NOVEMBER

1979

volume 9, number 94 621 West Nineteenth St., Costa Mesa, California 92627 Phone: (714) 645-8830

STAFF CONTENTS PUBLISHER Walter L. Schroder

FEATURES EDITOR W O R K B E N C H , Bill Northrop...... 6 Wm. C. Northrop, Jr. O V E R T H E C O U N T E R , Phil Bernhardt ...... 8 GENERAL MANAGER Walter L. Schroder T H E F L IG H T IN S T R U C T O R , Dave Brown...... 11 ASSISTANT EDITOR R / C W O R L D , Bill N o rth ro p ...... 12 Phil Bernhardt “ 1 T O 1” R / C S C A L E , Bob Underwood...... 14 ASSISTANT GENERAL MANAGER F U E L L IN E S , George Aldrich, )oe Klause. Otto Bernhardt...... 18 Anita Northrop R / C P Y L O N , Jim Gager...... 20 ART DEPARTMENT Chuck Blackburn L E G IO N A IR “ S H U T T L E ” R E V IE W , Steve Upton...... 21 Al Patterson B Y R O N P IT T S R E V IE W , Jerry Nelson...... 22 OFFICE STAFF R / C A U T O N E W S , Chuck Hallum ...... 24 Edie Downs Ceorgi Gilleran R / C S O A R IN G , Dr. Larry Fogel...... 30 Pat Patton S L O P E S O A R IN G , Dave Thornburg...... 32 A. Valcarsel W O R L D R / C S O A R IN G C H A M P IO N S H IP S , jack Humphreys...... 33 CONTRIBUTING EDITORS QSAA EASTERN REGIONAL, Doug Early...... 36 George Aldrich Walt Mooney P L U G S P A R K S , John Pond ...... 38 Dave Brown Mitch Poling Otto Bernhardt John Pond D U C T E D FA N D E S IG N , Bob Kress...... 44 Rod Carr Fernando Ramos H A L F -A S C E N E , Larry Renger ...... 46 Jerry Dunlap Larry Renger Larry Fogel Dan Rutherford R / C P O W E R B O A T IN G , Jerry Dunlap...... 47 Jim Gager Tom Hutchinson S T R IC T L Y S A IL , Rod C a rr...... 50 Chuck Hallum Dave Thornburg Bill Hannan John Tucker F R EE F L IG H T S C A L E , Fernando Ramos...... 56 Joe Klause Bob Underwood H A N N A N ’S H A N G A R , Bill Hannan...... 58 ADVERTISING MANAGER C O N T R O L L IN E , Dan Rutherford...... 62 Walter L. Schroder FR EE F L IG H T , Tom Hutchinson ...... 64 4th ANNUAL NIM AS RECORD TRIALS, Jose Tellez...... 68

SCALE VIEWS R/C MODEL BUILDER (ISSN 0194 7079) is BOEING F4B-3 & 4, Pete Westburg...... 27 published monthly by RCMB INC., 621 West Nineteenth Street, Costa Mesa, Cali­ fornia 92627. Phone (714) 645-8830.

CONSTRUCTION Subscriptions $20.00 per year, $37.00 for two THE POCKET SOARER, Bengt Lundström...... 16 years. Single copies $2.00. Add $3.50 per year for postage outside the U.S. (except BASSETT’S “ MISS PHILADELPHIA” O.T., Patterson, Northrop ...... 41 APO and FPO).

C U R T IS S 18-T-1 “ W A S P ,” Bill Noonan...... 52 Copyright 1979 by RCMB INC. All rights PEANUT MARTIN-BAKER MB-5, Mark Drela...... 59 reserved. Reproduction without permission prohibited.

Change of address notices must be received six weeks before date of issue that new address takes effect. Send old address with COVER: Pam Smith, Simi Valley, California, provides the final touch to a beautiful new; old label preferred. Post Office will Malibu Beach background for this Reed Packard photo of Bob Smith’s “ Sea Breeze," a not forward copies unless you pay extra 100-inch ERF (Entirely Ready-to-Fly) R/C sailplane. All parts of the ship are constructed postage. Duplicate issues cannot be sent. of molded fiberglass, with foam sandwiched into the flying surfaces for added rigidity. For further information . . . on the aircraft only . . . see page 99. Second class postage paid at Costa Mesa, California, and additional offices.

2 R/C MODEL BUILDER

SUP MUfiC SOARS ID VKTQRV ON THE WINKS Of 1 » AOUIAGRANDE! Airtronics designs captured top honors in the 1979 League of Silent Flight International Tournament. This grueling three-day multi-task competition between 100 of the country’s best sailplane pilots once again proved the championship quality of the Aquila and Aquila Grande. Skip Miller of Boulder, Colorado, won first place overall and first in unlimited class, flying an Aquila Grande with a Cox/Sanwa Medalist radio. Hoyt Holley of Bethel, Connecticut, won first place overall duration plus first in standard class flying an Aquila. Tim Renaud of Irvine, Californio, won first in junior class with an Aquila Grondé and Cox/Sanwa Medalist radio. The Aquila Grandé is the latest addition to our outstanding line of Airtronics kits. Designed for multi-task, unlimited class competition, the Grandé has already established its championship performance. It can help you to join the winner's circle. Check out the outstanding features of these great kits and radio systems at your local hobby shop.

COX HOBBIES INC. A subsidiary of Leisure Dynamics, lnc„ 1505 East Warner Ave., Santa Ana, Ca. 92702 FOUR FABULOUS FOAM-WING FUN FLIERS COMBINING THE CONVENIENCE OF A READY-TO-USE MOLDED FOAM WING WITH THE STRENGTH AND RESILENCE OF A BALSA FUSELAGE AND TAIL

SCAMP RC-45 2 OR 3 CHANNEL

Printed Fuselages Sides- Build Directly On The Wood *24.50 Die-Cut Plywood Formers and Doublers Formed Aluminum Main Landing Gear Aluminum Motor Mounts Nylon Control Horns Designed by MIKE GRETZ Tuf-Steel RC Links Threaded Control Rods Molded Hinges For .09 to .15 Engines * FLAT-BOTTOMED MOLDED FOAM WING Illustrated Instruction Book 45” Wing Span * BUILT-UP BALSA FUSELAGE Screws, Blind Nuts and 290 Sq. In. Wing Area * SHEET BALSA TAIL SURFACES Other Small Hardware 0 ROOM fo r s t a n d a r d s iz e r a d io s KLIPPER *25.95 INCLUDES PRE-BENT SHOCK-ABSORBING GEAR, NYLON GEAR BRACKET AND STEERING ARM.

COLT Designed by JEFF FOLEY *25.95 INCLUDES PRE-BENT SHOCK-ABSORBING GEAR, NYLON GEAR BRACKET AND STEERING ARM.

RC-43

SUPER SPORT Designed by MIKE GRETZ

COMPACT PERFORMERS RC-37 IDEAL FOR SMALL FIELDS

See your dealer first! To order direct, add $1 postage under $10. Postage free over $10. NoC.O.D. Send $2.00 for latest catalog of kits, accessories and supplies by SIG and other major companies. SIG MANUFACTURING CO___ MONTEZUMA, IOWA 50171 / > o m big hit in 1979. The record attempts, for CA 92627. Basically, the robots must not both heavier and lighter-than-air exceed 6 feet in height, 3 feet in width, BUI models, take place during the show, and 100 pounds in weight. They must at with the models flying over the heads of least be able to move forward, left, and spectators and exhibitors. With a maxi­ right, and will be judged on appearance, mum allowed wing loading of 3 ounces originality, functions, etc. per square foot, the HTA models are HTA models, in addition to a 3-ounce w o r k b e n c h light and slow enough to cause only maximum loading, must not weigh over small concern for safety while flying. 24 ounces ready to fly, and must not WHAT! SO SOON? Pilots, as well as models, must qualify to exceed a span of 8 feet. They will With the last major trade show of 1979 fly in the exhibit hall by demonstrating compete for longest time in the air. LTA models will compete by flying as many only three months old, it just seems too their ability on the Thursday evening soon to be talking about 1980 trade prior to the show. This year, TV cameras figure-8 laps as possible in a 30-minute time period. In addition. LTA's will shows. However, the Pasadena, Cali­ will be on hand to record qualifying compete for best handling ability by fornia International Modeler Show, the activity, for broadcasting on Friday flying through a gymkana course in as first for the 1980 season, is only three evening, which should assure a record short a time as possible. months away. spectator turnout for the weekend This is a show you shouldn’t miss! This third annual affair will again be affair. INDUSTRY NOTES held in the Pasadena Center, on January In addition to the R/C indoor models, 12 and 13, 1980, one week prior to the there will also be a first-ever competi­ A formal announcement to the indus­ famed professional football Super Bowl, tion for radio controlled robots. Com­ try, issued on August 7,1979, from Kraft and two weeks after the equally famed plete sets of rules for both the R/C Systems stated that, ‘‘Effective Septem­ Rose Bowl and Parade, all in Pasadena. robots and indoor flying models are ber 4, 1979, Phil Kraft will become The 1980 show will again feature the available from either R/C Model Builder Chairman and Mr. Arthur Leighton will Indoor R/C record trials, which were the or from IMS, P.O. Box 127, Costa Mesa, become President and Chief Executive Officer of Kraft Systems, Inc.” Just as we were going to press, a subsequent announcement came direct­ ly from Phil Kraft, dated August 31,1979, which reads as follows: “ To all my friends and associates in model aviation. “ It is with deep regret that I find my appointment to the position of Chair­ man of Kraft Systems, Inc., to be psy­ chologically incompatible with my per­ sonal objectives and consequently not in the best interests of the company or the radio control hobby. Therefore, I am terminating my employment and rela­ tionships with Kraft Systems, effective October 26, 1979. “ I could not have been associated with a finer group of people than my friends and associates at Kraft Systems. I firmly believe that ‘a business is people,’ therefore, the future of the company is in good hands. On July 12, 1979, Governor Bob Ray signed a Proclamation declaring July as Model Aviation month in Iowa. On hand for the occasion were Earl Witt, AMA President; Ken Morris, District “ The new president of Kraft Systems, VII Vice President, with his fam ily; Haxel Sig and Maxey Hester, representing the industry; Inc., Mr. Arthur Leighton, starts Tues- and various Iowa chartered club representatives, including the Des Moines Modelaires. Continued on page 116 6 R/C MODEL BUILDER Matty Sullivan "doing his thing" at the going away dinner put on by the industry for Walt Schroder during the WRAM Show. White Plains. New York, in February of this year. Inset photos were taken as other speakers addressed the group and Matty was mentally writing the script for his own comments. Whatever Matty had to say was obviously well enjoyed by (I to rl Nat Polk, Susan and Walt Schroder. Matty's delightful wife Marge, and Carrie Axelrod. Matty did not mince words when he talked about his friends, and they loved him for it. Photos and caption by WCN.

Matty Sullivan 19Π-1979

Malty Sullivan. 68, founder and chair­ mutual efforts to better the state-of-the- and Staten Island are a bit apart, and we man of both Sullivan Products and Sulli- art for model building. didn’t have the New jersey Turnpike at foam Corp. died on Friday, August 70, I know of no more innovative man the time. So. to collect the planes, Ray 7979. Sullivan Products, a hobby acces­ than Matty, his firsts in the hobby are too O ’Neal, and be there in an hour-and- sories firm, was founded in Ί94Ί. and numerous to recount here, but each did half was to move it all out and that was Sullifoam, a plastics manufacturing firm, add to the progress of the hobby. His the only way Matty could do it . .. all in 7955. steel lines, his braided steel lines, his out! He was a many time director of the Golden Rod, his fuel tanks, his engine I could go on and on. but it would Hobby Industry Association of America, starters, all originated with Matty, and serve only to be repetitious as Matty was and had received its meritorious award even up to the last days he was still in always there when he was needed, and of honor and distinguished service there pitching, so much so that just two we frequently needed him. award. He also received the distin­ days before his passing he was discussing To say I will miss him is toput it lightly, guished recognition award of the Dela­ 24-volt electric motors for his starter as there was no move or decision on my ware Valley Federation of Model Air­ with son Bob. And Bob told me that he part that he did not have part of, and the plane Clubs. managed final approval for the motor to hours spent on the phone when he Recently, he had been inducted into be used for this new and more powerful bounced things off me or vice versa are the Model Aviation Hall of Fame and electric starter. going to be some of the great gaps in my was a charter member of the Hobby He was always on-call for any help at life. So to Marge, his good right arm and Industry Association of America, the any time, and I well remember the beautiful wife, his daughter Carole and Hobby Industry Association of Delaware weekend in August of 1946 when he son Bob. plus the grandchildren, goes all Valley, and the Eight-Ball Association. phoned and told me to meet him at La my sympathy, and I know all of the He was a former national director and Guardia Airport and be ready to takeoff modelers throughout the world as well Fellow of the Academy of Model Aero­ for Chicago, as he had promised Russ . . . our good friend Matty will be missed nautics and had founded its scholarship Weber we would both be on hand to by all. Adios old friend. fund. help Russ put on a control line show at Walter L. Schroder * * * one of the Chicago stadiums. . . keep in Still another giant topples, and with it I mind, those were the days of DC-3's and lose still another good friend and the seven-hour flights to Chicago. But we industry loses one of its all-time leaders! made it. And then I remember the time It's becoming all too frequent, the that I called him during or right after passing of the giants of our industry, and World War 11 to pick up some planes and it’s amazing that we manage to keep up, pilots and drive up to Halloran Hospital but keep up we will because of the on Staten Island, New York, to help me ability of the younger members of the out with a modeling show I had planned industry pitching in to fill the gap. for the wounded G l’s. Exactly an hour- Be that as it may, I still have lost a and-half later Matty, along with Ray magnificent friend who was always there O ’Neal, arrived with at least five planes * * when needed and many times, accord­ and putona first class flying show for the ing to some, too often we teamed up on boys. Keep in mind that Philadelphia * NOVEMBER 1979 7 OVER THE COUNTER

• First bit of news this month is that MRC is bringing out an updated version of its popular Trainer Hawk all-foam ARF R/C job. (The news release calls it a 1979 version, but since 1979 is almost shot we'll say "updated.”) Apparently MRC knows when to leave well enough alone, as the only changes to the airplane were for cosmetic reasons, and consist of red and black pressure-sensitive decals for a sharper appearance. Other than that, it’s the same old Trainer Hawk, and flies just as well as ever. The engine is still the reliable Enya .15 TV and comes already installed in the fuselage . . . as does the The new fancied-up Trainer Hawk from MRC. tank, fuel lines, pushrods, and control horns. Only the radio is missing. Total of the 2-channel system pictured on the tional ship was designed by Mike Gretz, time to install an R/C system and do the back of this month's R/C MB. The trans­ who has designed quite a few of Sig's few simple steps to get the airplane in mitter features a 2-axis stick on the right kits, and features a 45-inch molded foam flying shape is only an hour or so. and a single-axis stick with ratchet feel wing and a sheet balsa fuselage and tail Eloy Marez did a Products in Use and separate trim on the left. What's surfaces . . . about as quick and simple as report for us several months ago, and more, this system can be upgraded to a you can get. The small engine size makes rather than repeat what he had to say 4-channel system when the flier is ready. a lot of sense too, when you consider the we’ll referyou to hisarticle in the Decem­ The Guidance System 3000 is sold with outrageous price of glow fuel these ber ’78 issue. Suffice it to say that Eloy either standard size or miniature servos. days. What is little more than a prime for was impressed by the Trainer Hawk in all You can also buy it for use with dry respects and felt that it was an excellent batteries or with factory-installed ni-cds. buy. And speaking of buying, the air­ In any case, all Guidance 3000 transmit­ plane sells for $99.95, which seems ters have a charging jack built into the especially reasonable when you con­ case so that even if it is bought with dry sider that the engine and muffler sell batteries, it can easily be converted to separately for about $48. Not a bad buy ni-cds with no factory modifications at all. necessary. You’re going to need a 3-channel R/C The Guidance System 3000 with two rig for your new Trainer Hawk, and it just heavy-duty MR-12 servos and provision so happens that MRC has exactly what for dry batteries retails for $149.95. The you need in its new Guidance System full ni-cd (transmitter and airborne) 3000 radio. This unit is a logical extension version with two MR-12 servos sells for $188.95. Both versions are available now. The Trainer Hawk and Guidance System 3000 radio are products of Model Rectifier Corp., 2500 Woodbridge Ave., Edison, NJ 08817. * * * Sig is introducing a new trainer/sport model for .09 to .15 size engines, to be MRC Guidance System 3000, 3-channel R/C outfit. called the "Scamp.” This fairly conven­

The Tower Hobbies 1979-1980 R/C Catalog, New 2 or 3-channel sport model from Sig, called the "Scamp." now available.

8 R/C MODEL BUILDER "Graphics," pre-cut letters and numbers from Coverite. Sterling's F6F Hellcat, primarily designed for C/L but easily adapt­ ed to R/C .

* * * big German manufacturers of large scale Sterling Models is also bringing out a R/C sailplanes. The instrument faces are new kit, this one being a profile version printed in full color on black paper with Heavy-duty hardware for big scale models, a pressure sensitive adhesive on the from C.B. Associates. of the F6F Hellcat for C/L Stunt and sport flying. Also, when the kit comes out (it back, and are pre-punched. All that is hasn’t been released yet), the plans will required is to choose whatever instru­ a .60 is enough to keep an .09 running for show how to install an R/C system for ment you want, remove it from the several minutes. sheet, position it over the instrument Other features of the Scamp kit are some wild aileron/elevator stunt flying. The kit includes die-cut balsa and ply­ housing (which is molded from black die-cut plywood formers and doublers, plastic), and stick it down. For the formed aluminum main gear, aluminum wood parts, a vacuum-formed clear plastic canopy, hardware for the C/L finishing touch, a clear plastic "glass” motor mounts, threaded pushrods, and version, and a full color decal sheet. The cover is snapped in place over the face, all off the little stuff such as control airplane is designed for .19 to .35 size resulting in a very professional and horns, hinges, screws, blind nuts, cle­ engines and spans 42 inches. realistic dummy instrument. vises, etc., etc. The foam wing is fuel- No price has been announced, and The sheet contains just about any proof as is, but for better appearance the kit is slated to be ready for the fall instrument you’ll find on a full-size and longer life should be finished with season. You can find out more from panel, plus some special sailplane instru­ either paint (Sig Plastinamel is a good Sterling Models, 3620 "G " St., Phila­ ments . . . even a nav-com radio is choice) or plastic film coverings (Econo- delphia, PA 19134. included. As far as we know, this is the kote or Solarfilm). only set of 1/4-scale instruments avail­ You can pick up a Scamp kit at your ♦ * * able, and certainly seems to be worth local hobby shop for just $24.50; the kits Jerry Nelson, of Midwest Model Sup­ the asking price of $9.95. For more should be available by the time this issue ply, sent us a sample of the 1/4-scale information, contact Midwest Model comes out. From Sig Mfg. Co., Monte­ instruments that are being imported Supply. P.O. Box 518R. Romeoville, IL zuma, IA 50171. from Modellbau Wanitschek, one of the 60441.

Nicely-made 1/4-scale instruments being imported by Midwest L.R. Taylor’s Accu-Charge, charger for 12-volt starter batteries. Model Supply.

NOVEMBER 1979 9 Impressive air-operated retracts from Sonic Systems. Dual Trim Arms from Robart, made to fit 99% of all servos ever built.

Also from Robart, a Differential Bellcrank and Feed Thru Bellcrank.

Clever little Bulkhead Switch Mount iron Waterproof sea Is for R/C boats, by G&M Rosie's R/C Products. Models.

Master Kit's "T.IM .T.", powered glider for training or sport flying. New heavy-duty servo mechanics, the D-8, from Dunham's R&R.

* * * the catalog. adhesive that doesn't attain maximum Tower Hobbies has advised us that its It's easy to see that the Tower Hobbies adhesion for about 24 hours, letting you rtew 1979-1980 Radio Control Catalog is 1979-1980 catalog is more than just a lift and reposition the figures if you hot off the presses and is better than catalog; it is a valuable reference tool don't get ’em straight the first time. ever. It’s quite a catalog, with 358 pages that no R/C modeler should be without. Graphics are cut from a very thin cast listing merchandise from over 150 manu­ The catalog is available by itself for $2.50, vinyl that is very pliable, making them facturers at discount prices. In addition, or you can get one free of charge with just the thing for going over compound there are two indexes (manufacturer your first merchandise order from curves. The adhesive is claimed to be and product) that make it easy to find a Tower. The address is Tower Hobbies, absolutely impervious to glow fuel and needed item quickly. If you have a P.O. Box 778, Champaign, IL 61820. The will stick on just about anything. Graph­ question about a certain product, you toll-free phone number from Illinois is ics come in 1, 2, or 3-inch sizes, in gloss can use the “ Tower Action Post Cards” 1-800/252-3336; from anywhere else, red, black, or white, and are paintable if in the catalog to write directly to the call 1-800/637-7686. those colors don’t suit you (the manu­ manufacturer for more information. * * * facturer recommends spraying the en­ Also included is a revised and updated tire sheet, then remove the figures after accessory completion guide in an easy- Decorating your new model is now the paint is dry). Each package contains to-use chart arrangement that enables easier than ever with Coverite’s new two complete sets of numbers (0 through you to determine what accessories you “ Graphics,” pre-cut vinyl numbers and will need to complete the kits listed in letters with a special pressure-sensitive Continued on page 111 10 R/C MODEL BUILDER igk INSTRUCTOR Conducted by DAVE BROWN 8534 Huddleston Or. Cincinnati, OH 45236

• The subject for this month is one I conditioning, the attached garage can polyethelene sheet, so that it could be have avoided until the late fall, as it is be made into a great workshop, but the cleaned easily or even replaced when it more appropriate when the building detached garage will require more work becomes too dusty. It is also important season is arriving. (I know I’ll get some to make it suitable (electricity is more of that you install some large furnace filters flack from those of you in climates a problem, for example). A spare room in the walls or door to keep dust out where there is no building season.) A in the house used as a workshop has the while allowing good ventilation. letter from Bob Spigener of Oklahoma advantage of being already heated, air Once the spray booth is built, I feel it City, which I received last spring, pro­ conditioned, has electricity, etc., and is is a good idea to set aside an area for the vided the inspiration. The Ideal Work­ quite convenient, but its disadvantages storage of completed airplanes, keeping shop, of course, depends somewhat on are many, such as small size, problems in mind that they must be charged and what type of airplanes you build, but the with paint and glue smells (not to taken in and out easily. This area should basic considerations are the same. The mention balsa dust and wives not mixing be partitioned off somehow, if only with first consideration is where to put your well), and limited ability to support any a curtain, to keep dust off of the models. workshop, and here is one decision that large machinery. Next comes the installation of any can have a profound effect on your The outbuilding has few advantages machinery, and I recommend that most enjoyment of it. The most common other than that the paint and glue smell of this be mounted along one wall to possibilities are: the basement or a will not bother your family as much, but simplify the electrical hook-ups. Make portion thereof, the garage, a spare nearly every other disadvantage men­ sure all machinery is easily accessible room in the house, or an outbuilding tioned applies. These advantages can be and not positioned too closely together. separate from the house. Although you overcome with a lot of effort, and for The remaining wall should be equipped may not have all these options, it is a many this is the only available option. with two-foot-wide benches and shelv­ good idea to consider the advantages Now that the place has been selected, ing for normal construction, and one and disadvantages of each possibility the selection of what tools and equip­ assembly bench should be positioned in before deciding. ment you’ll need will depend on what the center of the room. I find this bench The first possibility mentioned was the type of airplanes you intend to build, as invaluable, as it enables you to walk all basement, and this probably accounts well as how much equipment you can around an assembled airplane. All of for more workshops than all the other afford. Plan your workshop layout to these benches should be built as straight, options combined. The advantages that allow for the addition of more equip­ strong, and stable as possible. An old the basement has are that it is usually ment and tools at a later date. My own bowling alley slab makes a nice, flat, reasonably warm in winter (or at least opinion of an ideal tool selection, in straight workbench, if you can find one. easy to add heat ducts) and usually cool order of importance for general build­ I use a piece of tempered glass about in the summer. A basement typically has ing, would be the normal hand tools three feet square to wrap cores on, and plenty of electrical service readily avail­ (knives, saws, pliers, etc.) first, followed this seems to work well. To complete the able, and most have running hot and by (in order) a Dremel tool, a small ideal workshop, a Shop-Vac (vacuum cold water. Now, if this all sounds ideal, jigsaw, an air compressor and spray gun cleaner) is absolutely necessary to keep then perhaps we should consider the (if you intend to paint your models) or a the place clean, and some pegboard disadvantages of the basement work­ Monokote iron and gun (if you don't would be nice to mount tools and shop. They are typically somewhat intend to paint), a drill press, a disk or accessories on so you can find them. damp, and some even flood in the belt sanding machine, a bench grinder, With a few exceptions, my shop is set up spring, depending on your location. etc. Other machinery and tools will in this manner and it is very convenient Basement steps are typically steep and depend greatly on what your needs are to work in, with one small problem: it is narrow, which makes it difficult to carry and may include a table saw, a metal usually knee-deep in junk, and the airplanes in and out, as well as limiting lathe, a milling machine, or whatever. benches are usually a foot deep or more the size of any machinery you may want. Now it is time to start to lay out our with every conceivable piece of trash. The garage is probably the next most dream workshop. I would start out by Oh well, I never claimed to be perfect. common workshop area, and its advan­ building a spray booth in one of the rear It’s a short column this month, as I’ve tages are easy accessibility, and they^re corners. It should be about 10 feet been preparing for the Nats and for the usually dry. If it is attached to the house, square for convenience in using it, South Africa trip, and also I haven’t it has the same advantages as the base­ although 8 feet square would be enough received ANY letters lately with ques­ ment, in that it is convenient to sneak if you are short on room. It must include tions! Please, guys, just a postcard or a out to the workshop even when only a an explosion-proof exhaust fan and note scribbled on even a piece of toilet few minutes is available. The disadvan­ should have fairly high intensity (150W) paper would help, and they can be tages of the garage workshop are that a spot or flood lamps installed in the mailed in or handed to me if you see me garage isn't always heated well, and corners, as well as some smaller bulbs at a contest! Please send them to Dave even if it is, it is usually poorly insulated, for general lighting. I’d build it using Brown, 8534 Huddleston, Cincinnati, making it very hot in summer. With the simple 2x2 framing and cover it with OH 45236. · addition of insulation, heat, and air replaceable cardboard or possibly even

NOVEMBER 1979 11 Beautiful 2-inch scale Curtiss Hawk F6-C1 seen at the recent Scale Squadron meet at Mile Square Park, Fountain Valley, California. Built by Eugene Martin, Felton. Calif.,it will be featured as a complete construction article, coincident with Pete Westburg Scale Views, in R/CMB.

By BILL NORTHROP EWORLD PHOTOS BY AUTHOR WHAT WENT WRONG!? brainstorm session with LeGray, and our becoming popular, and “ oversize” R/C Back in the January 1977 issue of earlier experiences with radiocontrolled scale models only enjoyed scattered Model Builder, we introduced our old-time free flight models during a fun- interest among isolated enthusiasts. concept of Mammoth Scale. The con­ fly sort of thing at Taft, California. At the The N orthrop/Gray concept was cept came about as the result of a time, R/C assisted O.T.’s were just based on our "discovery” that large (8to 9-foot span), lightweight Old Timers flew at what appeared to be that realistic but somewhat elusive rate called "scale speed." This editor was fortunate in that Spirow Nicholau, an excellent O.T. free flight modeler, appeared with his beau­ tifully-built PB-2 (plans in August 77 MB) in which he installed an O.S. Gold Head 60, and a Futaba radio on rudder, elevator, and throttle. At the time,Spirow was quite new at radio, so it wasn’t long before we were handed the transmitter, as his orientation problems allowed the PB-2 to get higher and farther away. Within moments we had the PB-2 down to about 25 feet of altitude and buzzing . . . no, putt-putting past us at 2 to 6 feet from the ground. With Spirow nervously wringing his hands nearby, we shot one touch-and-go after another; on both wheels, left wheel only, right wheel only . .. and giggling all the while like a kid with a new toy. On the return trip from Taft, the R/CMB Editor's '72 Corvette becomes an aircraft carrier! Walt Schroder's Byron Pitts wouldn’t brainstorm session got into full swing. If fit in his Cordoba, so guess who took it from the office to his home. More in text. a large 8-foot span O.T. model could be

Doc Keith's Northrop A-17 taxies out at Mile Square. Grandfather of Flown by John Lockwood, Eugene Martin's F6-C1 is just about to the Douglas SBD, the family lines are very evident. flare at Mile Square. Note up elevator. A very smooth flying plane.

12 R/C MODEL BUILDER built ai under 6 pounds, why couldn’t it just as well be a scale model? Then you'd have a scale model flying at scale speed. Of course, this couldn't be a fully sheeted, fully detailed, fully painted scale model. It would have to be built like the big O.T. models . . . open structure, pre-colored covering mater­ ial, non-scale rib spacing, etc... . simply a blown-up rubber scale ship in the good old stick-and-tissue, sun-through- the-framework tradition. Actually, this editor had partially experienced the concept some years before, with his 7-1/2-foot span Gipsy Moth. Flown at the 1961, 1965, and 1966 John Martin’s ” First R/C” , a Royal Rudderbug, built and flown in 1955. John still living in Nats in R/C Scale, it appeared to take Joliet. Illinois, where this photo was taken. Wonder what the 'Caddy' model's doing there? more spectacular flying ability than was actually required. In 1961, it barely got off the ground when the ignition system to the Forster .99 failed . . . a probable life-saver for both plane and pilot. At the 1965 Willow Grove Nats, with an old and tired Fox .59, the 15-pound model put in an excellent low-altitude flight and took 3rd. In 1966, it placed 4th, performing an extra touch-and-go when the throttle refused to drop into full low. All of the Gipsy’s flights were slow, realistic, and very easy to perform, making an average flier look really good. Ah yes, quarter- scale is not new. The above reflections were also thrown into the brainstorming session, and the conclusion was that with proper structural design, getting away from scale construction, the Moth could have been built much lighter. The more we talked about open- structured, rubber-powered type scale models, the more we leaned toward the models of that Golden Era before World War II, and the designs that eminated The "Eugene Martin Flying Team". Dennis Griggs cranks on the HB 61 as John Lockwood from those years. The Mammoth Scale checks controls on the F6-C1. Builder and team manager Martin wears "supervisor" hat. concept was thus expanded to include the word "Classic.” and with them came 20. 30, and even 40- Fleet, the Byron Originals 1/3-scale Pitts, Our thoughts on power for these MCS pound small aircraft. Also, along came and the Bridi Rearwin Speedster are models never wandered beyond .60 the need for full-scale building tech­ really great, but the scratch-built “ mon­ because we simply felt it wasn’t neces­ niques, heavy-duty this, heavy-duty ster models” that are showing up here sary. Again, if an 8-foot span Texaco- that, and a great deal of concern about and there are getting beyond reason. style O.T. model could take the air at safety, and speculation about “ Where The building techniques required to 5-1/2 to 6 pounds, why worry? do we draw the line on size.” make them airworthy are far beyond the Well!!! Look what happened. Along We have to admit that a few kit capabilities of even above-average came the 2 to 3 cu. in. ignition engines. models, such as the Concept 1/4-scale Continued on page 110

_ What next?! Bob Seigelkoff (CB Associates) has now installed a Leon Shulman with his Fox 45 powered bent-wing Top Flite Con­ Kawasaki engine on his Grumman Ag-Cat (Dec. 7 8 MB). tender 40. Logictrol International Super Pro operates controls.

NOVEMBER 1979 13 • Some things seem to continue to occur over and over again with little or no change. The sun makes its appear­ ance on schedule and departs with the same predictable regularity. Prices seem to advance with no let-up. The IRS finds whatever way necessary to find ways of “withholding” our future. And each time we have the model aircraft we so lovingly constructed leave the ground, it finds a way to return to the ground, sometimes in unique and surprising attitudes. The more things seem to change, the more they remain the same, and the one thing which seems to continue ad infini­ tum is the question, “ What do I need for documentation?” I realize that we have treated this question in one form or another before, but I feel that it needs constant attention. To ignore the ques­ tion or most certainly its answer is probably one of the most discouraging aspects of scale modeling. Ray Stits was right when he touted his Sky Baby as being the "World's Smallest"...wingspan Just within the last several months at is just under eight feet! Power is an 85 hp Continental. Now inEA A Museum in Wisconsin. least a half dozen persons right in my immediate St. Louis area have related the sad tale of having completed or started a model, only to find that the information they had afterwards begun to accumulate did not match the model. “ What can I do?” they ask. I suspect it's 1 ™ much like jumping from a plane and then asking how the chute works. Please work diligently at bringing By BOB UNDERWOOD PHOTOS BY AUTHOR together the various items you need In way of illustration, may I use my curacies present: before you begin any construction. This long-standing love affair with the Whitt- 1) Rectangular fuselage cross-section should include the three-view, photos, man D-12 “ Bonzo." At the time I built shown does not exist anywhere on the and any other materials available. Read the last model, the one that went to the aircraft. carefully the printed material you have Internats in Sweden, I had accumulated 2) Struts or flying wires are shown to see if something might be revealed three different three-views. Not one of from the stab to the tail skid area of the there that will help clarify some confus­ those three was completely accurate. fuselage. They do not exist. ing items. One of them was, shall we say, laughable. 3) Nice slope on the lower portion of Separate your photos so that you can When I made the last of several trips to the engine cowl doesn't exist. compare various features with the three- Hales Corners to photograph, measure, 4) Canopy shape most inaccurate. view(s) that you might have accumu­ and study the “ Bonzo,” I asked Mr. Shown as a full plastic shape, when in lated. Make notes as to differences that Gene Chase about his knowledge of the fact it consisted of a combination of you might see and evaluate carefully three-view preparations. He related that triangular shaped rolled sheet and your decisions. Let others help you with he was not aware of anyone who had aluminum. Cutouts in side are incorrect. this task to compensate for the "blind­ visited the aircraft and done any mea­ 5) Rudder and elevator shape in­ ness” we often develop as we study suring, etc. correct. things. Break your study into sessions so Now, just recently, another three- 6) Wing flying wires incorrect. you return with a fresh look. It’s much view appeared in another model maga­ 7) Rib spacing most inaccurate. Actual like proofreading; mistakes often fade zine with the name of a well-known aircraft has 4-inch spacing with some 22 from view as we stare at them for long artist on it. Since it is not dated, I cannot ribs in each wing panel. Three-view in periods. tell when it was prepared; however, let question shows 10. Take into consideration the angles me point out some very definite inac­ Ah well, that should give you an idea that might be present in the photos. So often the camera angle alters the ap­ pearance. You’ll find this especially in rounded surfaces such as spinners, round fuselages, etc. It might help, if you should become confused as to the actual shape, to visit a local airport and see if you can find a similar type of shape to view. The most discouraging thing to me is the problem one encounters with three- views. It is not my purpose here to discredit the work of those persons who prepare three-views; however, the deeper I get into scale, the more I realize that very often the available material is quite inaccurate. As a result, when you try to reconcile your information, all you do is prove that what you have is wrong. Dick Graham's Piper Pawnee makes a low pass for the judges at Mint Julep meet. Talcum powder "dust" makes for sweet-smelling fly-bys! Photo by Dale Arvin.

14 R/C MODEL BUILDER Harold Krier's full-size aerobatic ships would all make excellent Lots of warbirds at Mint Julep contest. Photo shows just four, two models. Chipmunk in foreground. Great Lakes and Cub in back. P-51'sand two P-39’s. Photo by Dale Arvin. of the inherent problem involved. The A SEARCH forthcoming next month. above items do not even take into What are you seeking for the latest I know that many Scale people are account measurement problems. I did bird? eagerly awaiting the Scale '80 event and not take the time to go into that aspect of Chrome parts are a problem. Have intend to journey north to our Canadian it with the suspect three-view. you tried a L'eggs “ egg” container? The neighbors for the competition. It will be Now, where does that leave us? Con­ ends make great hubcaps. The "chrome” significant to see what level of participa­ fused, I suspect, would be a reasonable part is very thin, so exercise caution in tion develops for the event. There was a answer. It is easy to see that in the case of working with it. The disposal of the smaller number of persons represented many aircraft, a particular subject air­ product within the egg requires some when it was last on this continent, due to craft may not completely fit a three- thought, especially if you are married. the cost of transporting a larger number view, since thousands may have been Trying to duplicate a weld joint with its of teams over the big waters. Now that made over a period of many years. irregular metal material? Try R/C 56 the currency levels are somewhat differ­ adhesive. It will stick to metal well and ent, perhaps a greater number of Euro­ Through that period, updating and remains flexible. You can make it ripply pean countries will be able to afford it. changes will occur that will greatly alter and it will stay without running smooth. A second concern will be whether the aircraft. However, in the case of the It paints great. We mentioned it earlier there will be a control line competition. Bonzo, we are speaking of a one-of-a- for rivets using a mini tip on the con­ At this date, just two days before the kind ship. Certainly it was changed from tainer. Nats, the number of participants signed 1934 to 1939, however, the changes for the team selection program is larger became most subtle in the later years. SPORT SCALE: OTTOWA '80 In 1980 the U.S. will be sending a Sport in control line than R/C. It would be a One might argue that such accuracy is Scale team to Ottowa for the Internats. shame if the event cannot be official in not really necessary, and indeed, that Since the event is not yet an "official” '80 due to lack of participation from could be the case. It would be helpful, event until the approval of certain other countries (five are required). however, if one could be reasonably factors, the team will not receive finan­ There is doubt at this point that any certain that the material he is using is cial help from AMA. The scale organiza­ free flight participation will develop, accurate and has been developed by a tion (NASA) will shortly have patches on due primarily to the fact that Scale '80 study of the aircraft whenever possible. sale to develop monies to help pay for will be flown at an active airport. There is So much for the “sermon of the the teams. AMA will provide funds for still a chance that if enough local sup­ month.” Actually, it does not personally transportation, entry fee, and housing port could be generated, we might work disturb me as much as it may sound. I've for the Precision Scale teams (C/L and it out by flying at an alternate site which learned to discard what I’ve found to be R/C) and the team manager. Hopefully, is available. grossly inaccurate; however, it does we will be able to generate funds that RULES disturb me to think that newcomers to will take care of the Sport Scale team Your time is running out if you have the scale scene often become frustrated members as well. Be on the lookout for not yet written to your contest board because of the documentation problem. details on purchasing these patches concerning your feelings on the next rules cycle. Personally, I have received very little input from District VI mem­ bers. I'm beginning to have that sinking feeling about now, since I can’t decide whether people have given up on me as a basic idiot, based on my earlier votes, or whether everybody agrees with me totally. I prefer the latter, but suspect the former. Remember, you have to live with them for two years. ST. LOUIS ROBIN Early in July, an old timer visited St. Louis and made appearances at many of the local airports. The “ St. Louis Robin” was sponsored by Chapter 32, the local St. Louis EAA chapter, and was well received by historians, airplane buffs, Lineup of birds at Mint Julep. Big ships were fairly well represented, note the Aeronca C-3, two and modelers alike. (That’s not saying Citabrias, and Col. Art Johnson's big P-38 featured in June '78 MB. Continued on page 97

NOVEMBER 1979 15 FULL SIZE PLANS AVAILABLE - SEE PAGE 116 16 R/C MODEL BUILDER PHOTOS BY AUTHOR

By BENGT LUNDSTRÖM ... A nifty powered glider from Sweden, for single-channel R/C and an .020. Simple all-sheet balsa construction.

• The Pocket Soarer is a very small and BUILDING THE WING easy to build motorized sailplane with Make 24 wing ribs, all alike. Pin the good performance. The Jedelsky type ribs to the drawing with the front airfoil works better than the usual Clark 5x65mm block glued in place. Choose Y, and the tapered and swept forward lightweight balsa for this block! Then planform gives built-in washout. With a put on the rear sheet and cut away the model this size, the weight must be kept protruding parts of the ribs. Form the low, and the Ace Pulse Commander is upper part of the airfoil. Glue the recommended as it is still the lightest plywood root ribs in place and add the (and least expensive) radio gear. aluminum tubes for the wing wires. Compared to the photos, the drawing FINISHING has some simplified and improved After sanding, give the whole model 2 details in the wing mountingand the fin. or 3 coats of light dope. Do not apply BUILDING THE FUSELAGE heavy paint, particularly at the tail, Make the two fuselage sides and the which must be kept light. Give the bulkheads. Glue the sides to bulkhead fuselage nose a fuel-proof coating. No. 3 and together at the tail. Then put in FLYING all the bulkheads and ribs behind bulk­ If the CG is out of the recommended head No 3. Bend the sides together at range, adjust with lead. Make hand the front. Put on the bottom sheets. The glides. If the model stalls, raise the l.e. of torque rod from the actuator is installed thestabilizer with a piece of 3/32balsa. If now. it dives or glides too fast, raise the t.e. Glue the two plywood wing fillets to Then start the engine and fly. the fuselage and then epoxy the piano Always keep the plane upwind! A wires for the wing to bulkheads 3 and 4. sailplane of this size is hard to see and Note the dihedral angle. flies slowly. If you lose it downwind it is Now put on the top fuselage sheeting, very difficult to fly it back to you. Good the fin, and make the hatch. Bulkhead luck! · No. 2 slides in to keep the receiver from Radio switch is mounted in hatch. First bay interfering with the actuator. at wing root is completely sheeted for strength

Pee Wee .020 has lots of down thrust to prevent looping. Some The author getting ready for a flight. Swept-forward wing and builders might want to add an extra tank for longer engine runs. T-tailadd a distinctive appearance to the little bird.

NOVEMBER 1979 17 for either of these or SS-2, as we’ve mentioned before. They'll do a lot to lengthen your engine’s life. · BERNHARDT • Many modelers who are considering converting their engines to ignition operation are concerned with the possi­ P.O.Box 817 17119 S. Harvard bility of a power loss when operating on Edinburg. TX 78539 JOE KLAUSE Garden·, CA 90247 gasoline. Is it true, and if so, how much P.0. Box 2699 power will be lost? The answer is yes, Laguna Hill*. CA 92653 compared to glow fuel, you will experi­ ence some power loss when switching to Send in your questions, relative to glow or ignition engines, and these gasoline operation only if you have been experts will give you the correct answers. using nitro in your glow fuel. To get an idea of how your motor will perform on ALDRICH pistons in my diesel engines varnished gasoline, try running your glow engine easily and became very dirty looking. on no-nitro fuel, such as FAI fuel. This • We’ve been wondering how long it After just a few flights the pistons consists of an alcohol and castor oil would lake someone to ask us about cleaned up and remained very nice. mixture of about 4 to 1. Your engine diesels, or compression ignition engines, The Ethyl Corp. makes a product performance on this fuel would be. in view of the increasing cost of glow called Diesel Ignition Improver, or D.I.I. about the same if you were using a gas- fuels. Sure enough, we've had a number This is a blend of various igniters, and-oil mixture. Of course, if you add of people ask us about diesels and including amyl nitrate. Whether D.I.I. is nitro to your glow fuel you will boost its gasoline fuels, and now we have our frist still available, or available in small quan­ potency considerably. This extra power letter: tities, I don’t know. The object behind is not without a price. Although glow Dear Mr. George Aldrich: the use of amyl nitrate type igniters is to fuel can be power enriched by the addi­ After reading your article in the /u/y get better detonation. With 2 or 3% tion of nitro, the amount consumed by RCMB about the increasing shortage of added to the fuel, the compression the engine will be two to four times nitromethane. I decided to convert my setting can be backed off so that the greater than when running on gasoline. .049 engine to diesel because the 1/2A engine does not pound as hard, with no This means that a fuel tank for glow fuel is loaded with nitro, and when the loss in power. operation will have to be two to four price of nitro goes up so does my fuel. Besides the economy (glow engines times greater in volume than a tank for So I decided to go diesel with a diesel will run on diesel fuel too, if you want to gasoline for the same flight time. conversion kit. fight the ether), the big advantage to the I was wondering if you could give me a "What about the mixture of oil to diesel is its ability to provide 80% to 90% gasoline?” This question does not havea few hints on making diesel fuel, such as of its available power, even when badly additives, because this is my first go at a fixed answer, as it really depends on the set. They can be burping and sputtering type of engine you have. A lapped diesel engine. Any comments would be away and the model will still be flying appreciated. Yours truly. Brad Beeson. piston engine with a sleeve crankshaft like gangbusters. bearing will require a richer oil mixture Dear Brad: Diesels start and are set very easily Smart move! The diesel is the way to than an engine with rings and a ball once their behavior pattern is under­ bearing crankshaft. Many modern chain­ go if you’re trying to save money. We stood. And it’s great to go out to fly with used to put on demonstrations with a big saw engines use a gas-and-oil mixture of only your fuel and a spare prop. 15 or 20:1. Oil tends to foul the spark Flite Streak, powered by an Oliver Tiger Remember that ether is very danger­ .15. The little Oliver pulled the model plug if used excessively; however, not ous. It should always be kept in a FULL enough oil will cause excessive wear in about like a .29 glow engine and flew metal can. If you buy a quart and use a the moving parts of the engine. It’s far seven or eight minutes on a little 2 or pint, pour the remaining pint into a easier to change a spark plug than to 2-1/2 oz. tank. pint can. Don't leave it in the quart can. The only problem with diesels is the replace a cylinder and piston, so I (This applies to all fuels as well.) We also recommend that you don’t skimp on the fuel. It is available via Davis Diesel keep ether and diesel fuel in the refrige­ oil. If your engine has a lapped piston Development, but the culprit is the rator, with the container cap tightened and a sleeved main bearing and you are ether used as one of the base ingredi­ with a pair of pliers. Ether is safer when using a motor oil (S.A.E. 70) for a lubri­ ents. Ether has such a low flash point that kept cold and cold diesel fuel stays good cant, don’t use less than one part oil to it boils off, or evaporates very easily. A longer, as the ether does not evaporate four parts gasoline. If you use a castor oil good base diesel fuel is 40% kerosene, so easily. lubricant, don’t use less than one part oil 32.5% ether (commercial grade), 20 to Now all you have to do is to convince to six parts gasoline. If your engine is 25% aircraft mineral oil, and 2-3% amyl the little woman that the strange odor equipped with piston rings and a ball nitrate or nitrite or D.I.I. coming from the refrigerator is OK. bearing crankshaft and you are using Taking each ingredient separately, That, or pick up a used, apartment sized motor oil for a lubricant, don’t use less let’s discuss them. little job and put it in the garage. than one part oil to six parts gasoline. If Nothing liberates BTU’s like kerosene. We have had several requests lately to you use a castor oil lubricant, don’t use Use plain old lamp kerosene, not some­ warn everyone to oil their engines when less than one part oil to nine parts thing exotic like )P-4, etc. they get through flying. With a fuel that gasoline. Remember, a little more oil is Although it will work, you do not want contains nitromethane, the residue left better than not enough. When breaking- medical grade ether. Just plain old in the engine contains nitric acid. Ac­ in a new engine I recommend doubling commercial grade ether does a better tually, when the nitromethane fires it the oil content for the first hour of opera­ job. The only source we know of for forms nitrous oxide; that’s where the tion to insure a good mating of the mov­ small quantities of ether is HUMCO power comes from. If you don’t want ing surfaces. Laboratory, Texarkana, TX 75501. your engine's bearings rusted and the When breaking-in an ignition engine, All of the well-known lubricants such aluminum parts oxidized, put some kind the main objective is to produce a good as castor oil, Ucon, etc. will work, but the of light oil in your engine when you get running fit between all moving parts. The best we ever used is No. 110 weight through flying for the day. We've been greatest wearing of these parts takes aircraft mineral oil. It’s available at most using a couple of Teflon based lubes place when the engine is started for the any airport. The No. 110 nomenclature, lately that seem to really do a good job. first time, so during this period the if divided by two, gives the SAE oil One is called Tri-Flon and the other engine should not be required to do any weight. Before using this lube all the Break-Free. Check your local gun shop appreciable amount of work. Putting a

18 R/C MODEL.BUILDER load on an engine during the break-in period would cause excessive wear on critical moving surfaces before they have been properly mated. This in turn will reduce the total running life of the engine. Therefore, when breaking-in a new engine operating on ignition, heed the following advice: 1) Mount your engine on a sturdy stand equipped with fuel tank, batteries, coil, and condenser. 2) Install a medium diameter, low pitch balanced prop. A spinner is also advisable for electric starter use. 3) Set the ignition points so that they begin to open when the piston reaches the top of its stroke. 4) Fill the fuel tank with a low or no- nitro content glow fuel. If you have it, add a little extra castor oil. The reason for using glow fuel is that it will allow your new engine to run much cooler than gasoline would during the break- in period. 5) Start the engine in the conventional manner by hand or with an electric starter. After starting, open the needle A somewhat rare Ross Twin belonging to Alberto Ulrich and converted to ignition by Otto valve so that the engine runs at a rich Bernhardt. Crankcase and cylinders are anodized black, heads are gold. A very smooth runner. four-cycle setting. You may also wish to slightly retard the spark to further scavenged” when describing the cylin­ as far as model planes are concerned, reduce the speed. It should run so cold der porting of a model engine? I’ll bet all there’s a current craze that says big is that you can hold your fingers across the of us have at one time or another. It's beautiful. Now, I’m not knocking quar­ cylinder fins without burning them. even in the SAM rules (Sec. Ill, Para. 6), ter scale or mammoth scale. If that’s your 6) Let the engine run in this fashion describing suitable engines for conver­ thing, fine. However, for those of you for about ten minutes, then shut it off for sion to ignition for O.T. F/F competition. who are not as yet completely dedicated two or three minutes. Restart theengine Has a nice solid sound to it when talking to any particular size of models, here are and gradually screw in the needle valve to someone else, but the truth is that we some considerations that may lead you until an increase in rpm is noticed. Leave have been using the wrong terminology to conclude that smaller might be it at this setting for about five minutes. when describing our miniature engines! smarter. You will notice that the cylinder fin From the early days of the Brown )r. to It’s nice to have a large room that’s all temperature is a little warmer. today's non-Schneurle engines, the your own just for building models. But if 7) Now run the engine for periods of cylinder porting has always been cross you live in a small home or an apart­ about two minutes before shutting it off. scavenging and not loop scavenging. ment, you may have some problems. For Leave it off until the temperature has Cross scavenging is where the raw some unfathomable reason, wives and dropped to the point where you can incoming gas enters the cylinder and is mothers just don't seem to comprehend hold onto the cylinder. Then start and deflected upward by striking a baffle on the esthetics of a wing resting on a run it for another two minutes, each top of the piston. This baffle prevents cocktail table, with one tip in the kitchen time screwing in the needle valve slight­ the new gas from escaping through the and the other in the bedroom. If your ly. When the engine breaks into a two- exhaust port located directly opposite. models are in the four-feet-or-less cycle mode, start and stop it at least At the same time, the fresh new gas wingspan category, you’ll have a lot three times, letting it run five minutes helps expel the spent exhaust gas re­ more flexibility regarding space for each time and cool between runs. maining in the cylinder. This is the basis building and storage . . . ironing boards 8) Repeat the two-minute run-and- on which most all miniature non- are usually 4-1/2 feet long. stop cycles. However, each time you Schneurle engines operate today. How about those of you who have successfully unloaded your gas guzzling restart the engine, slightly advance the Loop scavenging is where the exhaust big cars in favor of the many-miles-to- spark, which will increase the rpm. Take port is located directly above the fuel the-gallon compacts? Have you ever your time and don’t be in a hurry to see bypass port (used by the fresh incoming tried to transport a really big model in a now fast the little beast will go. Many are gas to enter the cylinder). The theory Honda? With your Great Dane along for the engines that have been ruined by here is that the exhaust port is opened company? improper break-in. first by the piston on its down-stroke. What about costs? Modest size 9) Eventually the engine will reach its Then the fresh fuel port is opened, models, either kit or scratch built, simply peak rpm with the propeller being used. allowing the new gas to enter the cost less. The engines also have signifi­ If the engine holds a steady high speed cylinder, striking the opposite wall, cantly lower price tags. Last but not least, without slowing down, you may con­ bounding upward across the top and your fuel bill will be a lot less. Let’s face sider the break-in period to be over. down in the form of a loop, all the while it, a .60 tuned-pipe pattern ship usually Now you can switch fuels to the gasoline helping to push out the spent exhaust and oil mixture. You will find that the gas. Hence the term "loop scavenged.” I gets about nine flights per gallon at $15 or more per gallon. That’s well over a needle valve will have to be screwed in think you will all agree that this hardly considerably when running on gasoline. fits the description of our model tank of gas for your Honda, or forty cans of Alpo for the Great Dane . . . eight 10) Although your engine is now engines. · broken-in on glow fuel, do not overload meals. Forgetting about all those things, it when first switching to gasoline. KLAUSE Gasoline will cause your engine to run there just might be one other considera­ much warmer, and it is best to introduce • In this era of "Everything is .. . , ” it’s tion over which you have no control: your engine to this gradually. unlikely that anyone would be dismayed the availability of an adequate flying site. Incidentally, how many of you readers at hearing, "Happiness is a hobby.” Your chances of obtaining permission to have heard or used the term "loop Within this pursuit of happiness, at least Continued on page 91 NOVEMBER 1979 19 Before and after painting photos of Dave Latsha's Rivets, built from the new D&L kit. Manufacturer had some kit production problems, but should have kits ready to ship by the time you read this. Our Pylon columnist will do a review on this model as soon as possible.

P V L O N *6°FAST By JIM GAGER T u rn L e ft/ PHOTOS BY AUTHOR UNLESS NOTED

• Okay, you Turkeys . . . I’ve been w hen’s the last time you sent some the May Model Builder. nailed by several of you racers (North­ photos of your contest or a neat wreck “ Please see what you can do about rop too!) about the ever-popular ques­ or whatever? Just remember not to send having an application form published as tion: “ Where’s your Pylon column. Polaroids, they just don’t make it. They done for the LSF, NASA, NPJA.SAM, etc. Gager?’’ All I can say is that it’s awful have to be black and white (or B&W's, as “ Also, please mention that a Race tough to write an interesting article we say in the mag business), the larger Procedure Guide is available from AMA month after month without any input the better, and don’t write on the backs HQ at no cost. This Guide gives the from you guys to stimulate my creative­ with a ballpoint pen because the chemi­ Contest Director all of the information ness. You all surely have something to cal residue transfers the ink onto the required to run a successful pylon race. say, ’cause right at the busiest time of a photo. Instead, use a fine tip felt pen and The safety recommendations included contest you manage to find something separate the photos with a scrap of in the Guide were the basis for the distracting to talk about. Sit down and paper. Twenty-dollar bills work nicely. NMPRA’s response to the AMA Safety write me a short note about whatever is We received a brief note from Art Committee. A complete safety guideline bugging you or a subject you’d like to Arro, who edits the NMPRA Newsletter. listing will be forwarded to you upon read about, and quit griping that the Heeeeeerr's Art. . . AMA approval of our recommendations. only contest photos you see in this “ Dear Jim, We would appreciate the widest dis­ column are from the Midwest . . . “Thanks much for the NMPRA plug in semination of this information when it is

20 R/C MODEL BUILDER PHOTOS BY Bl LL NORTHROP

together and gluing the 1/4 by 1/8 top and bottom cross braces in the aft PRODUCTS IN USE fuselage, bulkheads 1 and 2 up front are added. Now put in the 1/8 ply forward bottom piece. This may be difficult, LEGIONAIR'S SHUTTLE SAILPLANE, by STEVE UPTON depending on how stiff this piece is. The front of this plane is very strong, so don't • The Shuttle is a Legionair kit designed by 1/8 plywood doublers to beef up the worry about it breaking. Now comes the for thermal or slope soaring. It has a existing balsa longerons fore and aft of wingspan of 78 inches and a wing area of the last ply former. fun part: gluing in the 3/8-inch diameter 819 square inches. If you’re in the aluminum wing joining rod. If the plane market for a fast-building sailplane that FUSELAGE is straight, the die-cut holes should be in combines uniqueness with perfor­ The fuselage was easy and fun to line. There is a 1/4-inch ply brace that mance, this plane is definitely the build. You start by building up the sides butts up against the aluminum wing rod. answer. The planform of the fuselage as usual, doing the needed modification The brace and wing rod are now lends itself greatly to exciting color at this time. The disc sander from Stricks wrapped with copper wire and the schemes. There are a few other things Enterprises came in extremely handy for whole mess is epoxied to death. Don’t that are unusual in the construction. An joints and gussets. After the sides are worry about the weight, since it’s at the example is the aluminum tube spar, a done you simply drop the bulkheads C.G. WINGS trademark of Legionair kits. It is an into the notches in the sides, taking care The wings are fairly easy to build, advantage because the wings are prac­ that everything is square over the plans. I because they almost serve as their own tically unfoldable on a winch. We have used 5-minute epoxy throughout the jig. The tube spar first has to be wiped doneall the test flying of thisairplaneon fuselage, since the strength is needed, with alcohol, then the ribs are glued on a slope in fairly heavy winds, and have especially in the open framework. I used with Elmers glue, since Elmers stands up found it to be a very smooth and easy Titebond only for the top and bottom flier. We will tell more about the flight balsa sheeting. After gluing the tail Continued on page 87 characteristics of the Shuttle after the construction part of this article. We found a modification that is neces­ sary in the fuselage. The fuselage con­ struction is all plywood in front of the wing and an open stick framework aft of the wing. Unfortunately, the point where the plywood meets the stick framework is a high stress point. Unless ou are an expert at soft landings in 20- not winds, as I found I was not, some beefing-up is needed behind the last ply Radio installation in the Shuttle. Cox Sanwa rig fits in with plenty of room to spare. Cables former. What we did was to splice in 1/4 used for controlling tail feathers.

Steve Upton with his Legionair "Shuttle" at Torrey Pines, famed for Two-meter wings have 819 sq. in. of area. Aluminum tube wing spar its fabulous slope site and nude beach below! Photo by Bob Upton. is typical of Legionair kits.

NOVEMBER 1979 21 PHOTOS BY AUTHOR & Bl LL JOHNSON N USE IN S T C U D O R P H BRON ORI NALS PTSS1, yJ NELSON Y R R JE by S-1A, PITTS S L A IN IG R O N O BYR THE who knows how many man-hours, their their manyman-hours, how knows who ih h ata poeue bt with but procedure, actual the with and photos 175 construction over with on. so and wheels, inch 4-1/2 for tensiometer wrench, end ball 8-32 class. first is kit the details, Pitts.assembly Byron the as product excellent Pitts tothe on Special. report product asked ado being about enthused overly after Byron Finally, the years. by several for research group of product development thethe followed have I • out, and anything that is somewhat somewhat is that called is anything and required out, item single Every final the to packaging original the From but had Ihavemy from workshop, never to wanted the Originals was Knowing Byron that spring. image Special, late Pitts in the released product, first ule cud sebe h etr air­ entire the assemble could builder required. as hints helpful only not explained, update. fully is revision step manualEach a 21 in additional photos an plus drawings, many prop, Zinger 20x8 a drive, belt the the as in ansuch isshopsupplied, hobby find local wouldn’t you that unusual ansuch with working of experience the I was effort, its make on firstcommercial Total parts count in the Pitts k it, not including the Byro Drive, comes to a staggering 324 parts! A ll first-class q uality, too. uality, q first-class ll A parts! 324 staggering a to comes Drive, Byro the including not it, k Pitts the in count parts Total Factory photos of some of the parts in the Pitts k it. Note how all of the small hardware is neatly packaged and numbered for easy identification identification easy for numbered and packaged neatly is hardware small the of all how Note it. k Pitts the in parts the of some of photos Factory 22 The instructions are very complete, complete, very are instructions The designsbiplane Several have emerged Most likely, the average model model average the likely, Most faue o te i. h wel pants wheel The kit. the of -features steps, but rather a long series of quick quick of series long a rather but steps, nottedious they’re fun; of lota actually Eachsteps step goesisthat one through. together, one put can they that claims process Econokote the with project the andfinish of evenings week one in craft simple as anything can be. Of particular particular Of be. can as anything simple h rjc a a oro oa a time. aatso or on hour a at working project the for perfect . . . processess are the interest actual Of right. probably are They hours. 8in covering, for ready factory The weekend. the of end theby mle daee ui ta toe with those than unit diameter smaller maxi­ develop that Engines engines. all nie Te uly culy ae tha takes actually pulley The engine. at­ that for same the is pulley not engine the totaches The engine. particular isis interest unit that fora each designed lmnm tahet lts molded plates attachment aluminum place of the prop driver, thus assuringthus a driver, prop the of place aisin attached similar pulley The rpm's. lower at performance power maximum a have speeds higher at power mum no h sds f h pns t h axle the at pants the of sides the into two have ABS) not fiberglass, (epoxy positive attachment requiring no no requiring maintenance. attachment positive as manner on the prop the driver normal location. A heavy steel axle/attach unit is unit A heavy steellocation. axle/attach h po die Br Die i as is Drive) (Byro drive prop The Let’sexaminea few of theengineering few of theengineering Let’sexaminea with no less than a 5/16-inch nut. When When nut. a less5/16-inch than no with gear landing aluminum the to attached ih -iue px ... mye 3 a maybe . . . epoxy 5-minute with ntle, h wel at s n per­ on is pant wheel the installed, rp h uis n lc it te fuse the into place in units the drop tohave youdo isAll painting. for except the into molded glass. are details fastener partlines the andfull-scale All weight. in manently. (after covering and painting) and attachand painting) and covering work (after of bit a not requiring nylon, minute job. minute utbe eesd aiy n h molded the in cavity recessed suitable quired, such as such attach athorn quired, the rudder atr poo f yo rv t O.. 6 RSR .60 .S. O ith w Drive Byro of photo Factory om part. foam into a is plate epoxied aplywood points, Available to fit most popular engines. popular most fit to Available covering! one was thatfield, positive observer the wing was flying a local the to taken first Pittsmywas When surface. simulated wing the ison wavyness fabric and tions much space available. I guess everyone guesseveryone I available. so space have much only we but interest, of points ribs type with and fabric built-up normal loca­ rib the Even warps. noticeable no has ideas on how to improve someone improve to how on ideas has h cbn srt ae odd from molded are struts cabane The light very is cowl fiberglass huge The nwee rifre n i re­ is ent reinforcem a Anywhere The foam The parts with are very well done Of course, there are many other other many are there course, Of / MDL BUILDER MODEL R/C strength of the tip. Simply cut the slot with two bäck-to-back hacksaw blades. Weight increase is nil. Speaking of dents, they can be filled in with spackling compound, obtainable at the local hardware store. The wings have 1/8 x 3/8 spruce spars laid flat into recessed slots. The spars seemed to be too tight in the foam. If you run the edge of a spar down theslot so as to widen the cavity somewhat, more room will be provided for the glue and allow you to keepthetopof thespar flush with the contour of the wing’s airfoil. The interplane struts are held in place with a long threaded rod and two 1/4- inch nylon bolts threaded into the rod ends. The bolt heads protrude from the wing. I substituted the bolts with 1/4- inch flat-head nylon bolts by Prather Products. Doesn’t work any better, but looks better. Of course, one must coun­ tersink the holes in the attach points. The elevator joiner is formed from The pre-molded foam parts that make up the bulk of the airplane. Parts can be covered or 5/32 wire, with a nylon steering arm painted as is, or can be fiberglassed to keep "hangar rash" to a minimum. used as a control horn. A flat is already ground into the wire for the set screw to firmly attach the unit to the wire. I was concerned, perhaps needlessly, about vibration loosening the set screw and terminating a flight much sooner than expected. A new brass arm consisting of two pieces of K&S .060 x 1/4 brass strip 1 inch long and spaced 1/16 inch apart were silver soldered to the 5/32 wire. Then a portion of the previous control horn was attached between the two strips and held in place with two No. 2 sheet metal screws. The exposed portion of the nylon arm is then attached to the elevator pushrod clevis. The aluminum landinggearissupplied with a large cutout for obvious weight reduction purposes. The cutout is to be covered over with Econokote. Didn’t Jerry Nelson poses with his massive monster model. Color scheme follows that used by Aus­ like that idea, so I cut out a piece of 1/16 tralian pilot Guido Zuccoli at the 9th World Aerobatic Championships this year. plywood, primed it with K&B finishing resin, and painted it the proper trim else’s product and this modeler is no workshop, car, etc.) can be a problem. color. Then it was attached to the exception. The suggestions offered are Seems that the wing tips on my Pitts are landing gear assembly with Silicon only to improve an already superior getting more than their share of dents. Sealer glue. Looks good and works product. The addition of a 1/16 plywood tip great. The Pitts is big, and hangar rash (the outline about 3/8-inch wide epoxied I elected to cover the Pitts with the dents that occur during handling in the into the tip greatly increases the impact Continued on page 99

Engine installation. HP .61 R turns a Zinger 20 X 8 at 6,000 to Tail assembly details. Stab brace is 1/4-inch aluminum tube. Finish 6,500 rpm with Semco muffler. is K&B Superpoxy.

NOVEMBER 1979 23 PHOTOS BY AUTHOR

Just before the start of the Finale. From I to r: Rick Davis (USA), F. Sasuga (J). Chuck Phelps (USA), Dave Martin (GB) (missing from photo but his car is there), Phil Booth (GB), Curtis Husting (USA). Bill Jianas (USA), Ronnie Ton (NL), Jeff Rold (USA), and N. Ishihara (J).

Phil Booth of Great Britain, the new World R/C Car Racing Champion. R/C AUTO NEWS • The 2nd World Championships for R/C cars at Geneva, Switzerland, July By CHUCK HALLUM 2-8, 1979, concluded with Phil Booth of Great Britain as the new World Cham­ pion. However, many (me too) had to wait several minutes after the race to find out who won because all the an­ nouncing was done in French. Was Bill Jianas catching and passing the leader? Was Chuck Phelps holding onto third, or second, or the lead? Where was Ishihara, the Japanese superdriver? Was he in second, or third, or where? I was not even able to understand the names of the drivers as announced in French, much less the position or lap count. Too bad that with five Americans and two Start of the Finale. Can you imagine the tremendous pressure on those ten drivers at this British drivers in the 45-minute Finale, point? All the cars look almost identical. they did not announce at least their positions and laps at ten minute (or so) and Booth a little over 22 sec. But Jianas, lot, which is the Geneva Sports Arena. intervals in English. Phelps, and Ishihara were all out at The track surface was very smooth and The finishing order and laps in the various times and Booth seemed to be had a considerable amount of gravel finals are tabulated below: staying away from trouble (launch disks) showing. During the first two days of FINAL PLACINGS on the track. Sasuga was not a dramatic practice the traction was very poor. By No. Laps driver and I really didn't watch or time the third day (another practice session, 1) Phil Booth (G B)...... 116 him, so he must have been on the track the result of a schedule change) the 2) Bill Jianas (USA) ...... 115 all the time. The rest of the drivers were traction was getting reasonably good. 3) Chuck Phelps (USA) ...... 115 in and out of the pits with all sorts of When initial qualifying started on the 4) F. Sasuga ( J ) ...... 114 problems and were definitely out of fourth day, the traction was good and 5) N. Ishihara (J) ...... 109 contention. just seemed to get a little better each 6) Rick Davis (USA)...... 102 The weather for all seven days of the day, with very little change during the 7) Jeff Rold (U SA )...... 91 race was very good. Usually it was a little day, but rather improving overnight. 8) Ronnie Ton (NL)...... 81 overcast in the morning, clearing early The traction never appeared to decrease. 9) Dave Martin (G B )...... 77 and getting to about 70° to 80° each day. Site preparation was very good, with 10) Curtis Husting (U SA)...... 38 The first few days the humidity seemed good spectator control arrangements, a Toward the end of the race Jianas, fairly high, and several days in the late fantastic driver’s stand, good pit area Phelps, and Ishihara were turning 21 sec. afternoon it was cool and windy. with ten starters, good timing equip­ laps, with Ishihara having the fastest one The race site was the Vernets parking ment and lots of dedicated personnel.

The Sunday race crowd. Pit side was just as crowded. At 7 Swiss francs ($4.50) a head for the spectators, the race was a financial success. Note the large Fiat disc course markers, just perfect for putting a stray car into orbit!

24 R/C MODEL BUILDER Dave Preston, Kieth Plested, and Phil Booth in the British pits K. Masuda, N. Tomita, and K. Kondo in the Japanese pits. All working on their carson Sunday. Phoenix cars painted alike, same with all Kyosho team cars. These dedicated people included not using large numbers. The job of lap on your side; e) sat on top of the dots; or only the race director (and assistants), timing and counting is much easier. For f) if you went through the discs and but transmitter control, radio frequency the semis and mains, numbers 1-10 are didn't come back, you would lose a lap. monitoring, lap counting and timing, used and there is a little extra confusion, The bad thing about a, b, and c was announcing, starting and race control, but the numbers are sure easy to read. that you never knew how the car would and of course the turn marshals. There The race schedule called for practice land, and it was very destructive to the was just enough pit area for everyone, on Monday, Tuesday, and Wednesday; cars. Mufflers collapsed, bumpers with some in the shade . . . and it was three qualifying rounds over Thursday mangled, wheels broke, radio com­ really hot if you were in the sun. A local and Friday; then on Saturday, requalify­ ponents popped out, etc. There were Boy Scout troop provided the turn ing and eliminations for 65th to 128th to quite a few runaway cars and engines marshals, ticket takers, and parking get eight move-ups to Sunday: and the first few days. Finally the organizers control attendants. As turn marshals finally on Sunday, qualifying with the were convinced to remove the discs they did pretty good, though at first top four going to the final and the top from the inside of the corner entering unfamiliar with what to do. But as the three of two ten-car semis going to the the back straight. Things were much racing proceeded they became very final. The original schedule was for two better then; all we did was blast into competent and good. I don’t know how days of practice and three days for initial boards and probably ricochet into the the same boys lasted the full week. qualifying, but first day problems with outside boards. But at least we only hit The first official thing drivers did 160 competitors caused the change. I the front or sides of the car. Sunday afternoon. July 1, when check­ don’t think any racedirector/committee After a couple of practice/qualifying ing in was to get driver and mechanic could have done any better. days there was “ open practice.” It was photos for I.D. cards and pit passes. It During the first days of practice we completely uncontrolled and I called it was also my first chance to check out the learned what those FIAT discs could “ Kamikazi Practice.” Nobody had fre­ track surface and layout and the driver's really do. These discs were about two quency flags, you just went out and took stand. There were two small changes to feet in diameter and about six inches your chances. At one time there were 24 the track layout as originally published: high. Fiat probably popped for them and drivers on the stand, two deep in places, a slight left jog (angle) on the back got the dubious honor of having its running cars. There was practically straight and a little esse on the infield name plastered on them. With rather always 18 or so. The good guy approach straight. The little esse made you be a poor traction it was hard to always miss was to turn on the receiver and see if the little careful, but if you lined up any­ them .. . there were about 45 of them car was getting commands. If so, switch where near correct it was still full around the course. Hit one of those crystals. If not, go ahead and take your throttle. Oh yes, we also picked up our “ truck hubcaps’’ and you: a) did a half chances. The “ black hat” approach (and racing numbers for the cars and heat roll and slid 30-50 feet; b) attempted to it was used) was to turn on the trans­ race group and frequency assignments. set an altitude record; or c) attempted to mitter, crash the car that was running, One interesting thing done in Europe is set a flight distance record. And occa­ keep giving output commands for a that car numbers are 1-8 in all heat races. sionally you: d) did a quarter roll and sat while, and then go out after things had

Pit lane, starter boxes on right. On pit stops, car had to stop inside N. Ishihara of Japan was quick, consistent, and was top qualifier dotted line in front of your number. A 3-sec. fuel stop cost about 8 every tim e he ran. secs, total.

NOVEMBER 1979 25 U.S. drivers discussing a problem. Jeff Rold (foreground) was top Driver's side of track and Sunday crowd. Big driver's stand, but U.S. qualifier on Sunday, but had engine problems. imagine 24 drivers up during "Kam ikaze" practice (see text).

Mike Reedy, Curt Husting, Debbie Preston, and Rich Lee horsing Carl Petri, Mike Rowland, and Chuck Phelps working with Roger around in U .S. pits. Curtis looking on. Phelps placed 3rd in Finale. cleared. There was no way to check who finish line the recorder hit the appro­ the fastest laps (I had Bill lianas the was on whai frequency. I don’t think this priate key and that number along with fastest) and a few European drivers not should ever be done again! the time was printed on a paper tape. far behind. But the Japanese all seemed Official transmitter control was pretty Counters in both the timing booth and extremely smooth, and a couple of them good. Transmitters were impounded by in front of the announcers advanced were right behind the Americans and 9 a.m.. at which time you got your each time a number key was depressed. ahead of the Europeans. numbered "bib” which all drivers had to So, the paper tape could be used for Initial qualifying started. In the first wear. You only got your transmitter both lap time interval and overall time. round several Americans looked good. when your heat group was up. Then But there still could be problems if there Bill Jianas was getting some super lap after the last heat, you could get your were problems on the track or long pit times, but was having some problems radio by turning in your numbered stops. I believe the equipment usedat the and not getting a good overall time. Art ” bib.” ROAR Nats is better, but not as accurate Carbonell had problems too. Jeff Rold The method of lap counting and timewise. No way can three or four ran a clean heat and got a good time. timing was pretty good, using the same people keep track of all that is happen­ Many of the Japanese drivers looked equipment (Longine) used for full-size ing with ten cars in case of protests. Lap extremely smooth, and Ishihara was the Grand Prix cars. Basically, there was a time interval alone cannot be used to quickest, cutting all the corners almost caller, a recorder, and an observer, and settle protests unless you know what was perfect. Tall gearing, a small carburetor all timing room comments were re­ happening to that car on each lap. and 50% nitro gave the Japanese cars corded on tape. When the caller gave By the end of practice it was clear that the number of a car crossing the start/ several of the Americans were turning in Continued on page 72

Bill Jianas (left) and Rich Lee. Jianas was the bridesmaid again, The best from Germany, Reiner Dosch and his girlfriend, the top taking 2nd in the Finale. Lee made it to the semis. pit cutie. Dosch was in top 8 on Saturday.

26 R/C MODEL BUILDER First F4B-4 out of the factory has the enlarged headrest for life raft storage, refuting one report that only the last 45 out of 92 were so equipped. Battery box on left wing fillet is clearly visible. Boeing photo via Johnny Burnett. all F4B-4's were alike. Early airplanes had the F4B-3 engine cowling with two carb air intakes on each side ahead ol the cabane struts, while later airplanes had a B0ENG*F4B-4 single intake on the left side below the forward cabane strut, with correspond­ ing changes in the louvers and bead by PETER WESTBURG PART ONE stiffening. All surviving tube-and-tabric F4B-1's • The Curtiss Hawk P-6E must share a serious tendency to skid. The words in and -2's were retrofitted with the wide honors with the Boeing F4B-4 as the the test report are: “ . . .recovery from a fin, rudder, and anti-drag ring. Strangely, classic fighter biplane of the Golden skid to the right with free rudder is very no F4B-3’s were fitted with the wide fin. Age. Models of each have been built by slow, and the airplane will not recover yet it was the -3 on which the skid the hundreds of thousands since they from a skid to the le ft." The 22nd problem first appeared. · first appeared. airplane was modified with the easily The late 1920’s saw the appearance of recognizable wide fin and was called the the first aluminum airplanes. Thanks to F4B-4. metallurgy, the metal had attained a Thirty-eight additional F4B-4’s were strength-to-weight ratio that enabled it ordered, plus one assembled from spare to fly. At Boeing, the cigar fuselage parts, for a total of 92 airplanes. A Monomail and the B-9 bomber were the reliable report states that only the last 45 first examples of the stressed skin, alumi­ F4B-4's had the fat headrest, in which a num airplane. During the same period, life raft was stowed, but we have not the Army's P-12 and the Navy's F4B been able to locate a single photo of an W l M ' fighters were produced in numbers. F4B-4 with a wide fin and a narrow -3 Anxious to extend the life of the little headrest, though many are available of fighters, Boeing designed an aluminum the earlier numbered F4B-4’s. If the early V- monocoque fuselage for the series, the airplanes were retrofitted later, a photo Model 218. should be in existence. The Navy ordered 75 as the new F4B-3, Scale modelers have a right to be the Army 135 as the P-12E. Early in the perplexed at the visible differences in Original, intermediate, and final fin areas. Navy test program, the first F4B-3 showed the models and individual aircraft. Not Small fin made airplane skid in turns.

These nearly identical views clearly show the differences between the F4B-3 and F4B-4. Headrest and fin are obvious differences, but engine cowling and exhaust system are also different. Photo courtesy of Warren Shipp.

NOVEMBER 1979 27 28 R/C MODEL BUILDER OEBR 1979 NOVEMBER

1 / 4 - 2 « MACE WIRES 29 Woody Blanchard Jr. displays his original design "Les Joindres." Sailplane features a variable Woody has a rather surprised look as he camber wing and a "flapler" over the center section of the wing. launches his 2-meter "La Petite Joindres."

. . . well, you know. This retriever is separate from the launch winch. In fact, it can be used with Rc SOARING a hi-start. It’s especially helpful when launching from a long thin field and/or by Dr. LARRY FOGEL PHOTOS BY AUTHOR in a strong crosswind. According to Don, the retrieve line imposes no significant reduction in launch altitude . . . and I • I was headed for the East Coast on This contest was co-CD'd by Gus believe that. It works in all weather and Burgin and Don Goughner. Each electric business and a weekend away from can be operated by the pilot if necessary. winch was equipped with an automatic home, so I tossed my Olympic 650, the With this retrieve device in place you transmitter, charger, and ni-start into my line retrieval system . . . the one devised can launch up to one plane per minute. baggage. (I described that neat package and built by Don. Two years ago he Contests need no longer be launch received the LSF Best Technical Achieve­ in the April ’79 issue of MB.) Once there, limited. to be fully prepared for the DCRC ment Award for this design. Since then contest at Manassas, Virginia, on Satur­ he’s been perfecting this device, which The Winch Master Retriever is avail­ day morning, I plugged in the charger, eliminates the need for‘‘shagging lines.” able for about $180 from Don Goughner only to find that one of the charging Let me explain this term for the benefit (Rt. 2, Box 112, Red Lion, PA 17356). This bulbs had burned out. Can’t fly with an of any newcomers to our sport. Ordi­ includes the spinner, cam release uncertain airborne pack! narily the electric winch tows your plane mechanism, the motor, mounting base, I made a few frantic phone calls to the aloft. Your plane separates from the and line. It does not include the battery, local model shops and electronic supply towline, then the winch operator acti­ parachute, or turnaround. Don says that houses just before they closed for the vates the motor to draw the line down you can buy 100-pound dry test braided weekend, but without success. Couldn’t before it can be blown into trees, nylon line for about $9 per pound .. . find a miniature bayonet base bulb become entangled with itself, or, worse about 1600 feet. He recommends a 6- anywhere. What to do? Fly the contest still, with other launching lines. That volt golf cart battery. I asked the obvious anyway? Try to find another modeler leaves the parachute near the turn­ question, "What made you start this who has a Kraft charger, then ask him to around. Now someone has to go out project?" He then told me that he fell let me borrow the charger he’s probably there and drag the parachute and line some 20 feet, breaking four vertebrae using to prepare for the very same back across the field. That's called and his wrists. That put an end to line contest? At best that’s inconvenient; at “ shagging line” . . . a time-consuming, retrieving for some time. Yes, Virginia, worst, impossible! nasty chore. necessity IS the mother of invention. Then it dawned on me. My charger Well, the 45-pound Winch Master Woody Blanchard, Jr., of Hampton, has built-in redundancy. The bulbs Retriever eliminates all that. It consists of Virginia, flew Les Joindres and La Petite (transmitter and receiver required load a large cast-aluminum Mitchell Spinning Joindres (the two meter version of the charging lights) are identical. All I have Reel, a clever cam release mechanism, larger craft) at the contest. Both are to do is charge my transmitter and an electric starter motor, a battery, and equipped with droopable leading edges; receiver in sequence (rather than simul­ the base. The launching line is drawn in that is, you can modify the Eppler 205 taneously). A few turns of the Phillips- at about 18 miles per hour, the speed section by changing the incidence of the head screwdriver and the switch game depending on the load. Watching the forward portion of the wing. Woody was over. By morning I was fully charged parachute return to the winch before it uses 5° down for launch and about two- in both regards. I’ll not take you through ever touches the ground is really a sight. thirds of that for more effective thermal- the gory details as to why I didn’t win the Naturally, automatically dragging it back ing. In addition, the larger plane has a contest, but I do want to share some of over the ground is a bit slower . . . and two-foot by 1-1/2 inch flapler (com­ the high points. through tall wet grass . . . or loose rocks bined flap and spoiler) mounted over

Woody shows how the l.e. droops on his Les Joindres for thermalling. Airfoil is even thinner on the La Petite Joindres than on its bigger Airfoil is semi-symmetrical with l.e. up. brother. Gap apparently doesn't hurt performance.

30 R/C MODEL BUILDER Don Goughner demonstrates his Winch Master Retriever, auto­ DCRC flier Rudy Coleman and timer. They're either listening to matic towline bringer backer. Text tells how to get one. thermals or a football game. means "the joints” . . . clearly appropri­ means take the Skyline Drive. [It’s wise ate. Using the French gives it “ a bit of to call ahead for reservations at Big class.” I for one appreciate such experi­ Meadow Lodge (703) 999-2221.1 Set up menting. Dreams are only worthwhile if your hi-start on the open fields at Big tested against reality. Here’s wishing Meadows. If the wind is out of the west Woody continued success. you’ll be in fantastic lift when you slip off Rudy Coleman represented the Long the hook. If not, you’ll find lots of Island Silent Flyers. He flew his 170-inch thermals anyway. span “ Plainsman.” Its D-tube built-up Gordon Codding, of Kingman, Ari­ wing has a Wortmann Fx-167K airfoil of zona, writes "Dear Larry, I’ve enjoyed 12-inch chord. The plane operates at 8.4 your column for quite a long time . .. oz./ft.2, carrying at least 6-1/2 pounds keep it up!! I enclose two photos that (without ballast). It’s a beautiful sight as might be of interest to your readers. it graces the sky. Here is my nine-foot span 1938 Cavalier gas model converted to an R/C soaring Don Clark participated and, in addi­ configuration. I altered the controls and tion, provided an “ Open House” for all moved the wing back one fuselage Don Clark looks silly in that hat, but it keeps "contestants, workers, wives, etc.” You section for better balance. A camera him cool. Text tells where to get one. can easily spot Don at a contest. He goes in the nose, with a separate nose usually wears a parasol hat that provides the trailing edge of the center section of section replacing the streamlined one the wing. . . 3° up forspeed, 3° down for an effective sunshade while allowing full shown. The former engine mounts are ventilation of the scalp. I couldn’t help thermaling, 20° down for launch, and used to attach the camera. A four- but wonder how much lift that hat 80° down when you really need a speed channel MRC radio provides all three would provide on a windy day. For those brake. According to Woody, this allows controls. I’ve added ailerons since these interested, the hat is officially called the you to dive straight down from 1,000 feet pictures were taken. The former throttle "Brocca Brella.” It’s made in Taiwan and without fear of overstressing the air­ control is now used to operate the is available from LuWan Enterprises, frame. camera (an old Kodak Brownie movie Inc., St. Louis, MO 63043. Les Joindres is built around the Wizard camera). fuselage designed by Dick Belt. I couldn’t By the way, if you find yourself with “The Cavalier was always noted for its wait to ask, "What does Les Joindres sailplane in hand anywhere near the fine glide. It just seemed natural to float. mean?” Woody explained that it simply Shenandoah Valley in Virginia, by all Continued on page 92

Old Timer enthusiasts should recognize this one. It’s an old 1938 Berkeley Cavalier, converted to an R/C glider by Gordon Codding. Span is 9 feet, and a Kodak Brownie movie camera can be fastened to the engine mounts for in-flight movies.

NOVEMBER 1979 31 SLOPÉ—SOARING By DAVE THORNBURG .. . Now that you've found yourself a place to fly, as Dave explained last month, all that's left is to take your bird out and have at it. Here are the basic principles of slope soaring. • Last month's article covered the two relatively light, stable, tight-turning the right-of-way fence, maybe 35 feet most important criteria for choosing a thermal ship with plenty of room for behind the lip of the hill. But the wind is slope site: a favorable prevailing wind ballast near the center of gravity, so you blowing squarely into the face of the cut, direction and the absence of upwind can adjust the wing loading to the wind and the traffic on the road below is light. obstructions. For good soaring on any speed when necessary. It’s the best you can do without driving hill (ridge, dam, embankment, roadcut If you must build a plane just for the way out into the country somewhere. or whatever) the wind must strike the slope, there are only two criteria: make The first trick is to park your car down face as nearly perpendicular as possible. it simple and make it tough. The plain the road a ways. Parked cars draw And the approach to the site must be fact is, slope airplanes just don’t last as attention, and the last thing you want is a free of trees, buildings, other hills . . . long as thermal ships do, so you don’t swarm of day-trippers stopping to picnic anything that might deflect or turbulate want to put too many hours of love into on your hill and watch you fly. It's tough the wind before it gets to the face. For their construction . . . at least until you enough to negotiate a safe landing on this reason, beach cliffs and lakeshore become proficient. A two-meter ship the top of a windy, turbulent hill when dunes are nearly perfect soaring sites: like the “ Wanderer 72” or the “ Soar the area is clear; when it's covered with the water offers no obstructions to the Birdi” or “ Drifter II” is perfect. Such kits sharp-shinned spectators standing about oncoming air, lets it flatten out wind- are inexpensive, relatively quick to like zombies, it’s nearly impossible. tunnel-smooth before striking theslope. build, and easy to repair. All three are Study your hill carefully. It has two But the big point made last month was designed on the theory that light ships obvious drawbacks: the road at the this: you shouldn’t write off slope smite the earth more gently than heavy bottom and the trees at the top. You soaring merely because you don't live ships do, and hence do less damage to cannot, you must not land on that road. near Torrey Pines. Most Californians themselves. It’s a good theory. Ever. If you do, you can be sure that an who fly slope do so from inland hills, If this type of plane seems too fragile eighteen-wheeler will get to your air­ hills that may not feel a sea breeze for for the slope, keep in mind that you plane before you do, and deal unkindly weeks at a time, hills where the wind aren’t going to begin your sloping with it. Or else a retired mugger in a direction and velocity vary with every career in 42 mph winds. It may be true Corvair will wreck his car in an unsuc­ passing thermal; in short, hills that are that sloping is "what you do on days too cessful attempt to avoid hitting it, and no different from the hills in Ohio or windy to fly,” but these are not the days then sue you for your transmitter as well. Kansas or Alabama or wherever you for beginners. For your first experiences, The trees at the top are hazards of a happen to live. pick days when the wind is light to less public nature. They have waited Why would a Californian deliberately moderate; about eight to twelve mph is patiently for you for years; see how tall pass up the smooth air of a Pacific beach ideal. Any slope that won’t generate they are. They are certain to gobble your in favor of an inland site? I’ve asked this light lift in light winds isn’t likely to plane eventually, so you might as well question a lot, and for people not improve much as the velocity goes up. check them out now. Do they have particularly noted for their sanity, they Increasing velocity almost always brings enough low branches for easy climbing? give me some surprisingly logical increasing turbulence, particularly in Do they have enough poison oak? Still, answers. The coastal slopes here in the area just downwind of the lip of the the site could be worse: the area behind Tomorrowland, it seems, are all too hill. And unless your hill is fairly high the hill could be full of water instead of often a) crowded, b) foggy, c) chilly, and (100 feet or more), you may find that trees. Dams and high lakeshores make d) barren of grass and trees. Add to these winds beyond a certain velocity actually good to excellent soaring sites, provided arguments the fact that most public generate less lift than milder winds, at that 1) the wind is blowing FROM the beaches charge entry fees whether the least in terms of how high you can soar water and not towards it, and 2) you're wind is blowing or not, and you begin to above the hill. I call this condition already an experienced slope pilot. get the picture: that little grassy knoll "blowing the top off the wave” : when Anyone who tries to learn slope soaring out in Aunt Martha’s pasture starts the wind is too strong, it simply flattens on a dam face, regardless of whether the looking more and more like the Wasser- out the crest of the wave of air that’s water is up- or downwind, is going to go kuppe. breaking over your hill, just as a strong swimming at least once. I still have vivid So you’ve decided to give sloping a seabreeze flattens and scatters the crests memories of waiting on the bank of a try. Good. And you’ve found one or two of ocean waves. reservoir for the wind to blow my water­ sites within driving distance that look as So pick a light to moderate day for though they might generate lift. Double logged Junior Falcon ashore.. . your initial slope experience. Remem­ Now let’s look at the probable lift good. The next question is: what’s the ber that you’ll be doing two important pattern of the slope. It's about a football best slope airplane for getting started? things on your first few times out; field in length, easily big enough to Should I build one of those low-wing learning how your ship behaves in slope make nice long passes up and down the fiberglass missiles you see in the mags? lift conditions, and mapping the pecu­ face; I've had good flying on slopes half How big should it be? How tough? liarities of your lift site. And your slope Should it have ailerons and rudder, or will have its peculiarities, rest assured. that length. But notice the shape of the far end. Instead of tapering away gradu­ just.. . No two hills are exactly the same to fly, ally, it forms an abrupt corner for the Hold it, friend! I’ve got an answer here and every hill changes with wind direc­ wind to blow around. That’s a danger you're gonna love, especially if you’re a tion and velocity. These are the things zone. Remember how the wind blew lazy builder like me: you probably which make slope flying interesting; if around corners when you were a nasty already own an excellent slope soarer the lift was always the same, you might little pinch-faced kid back in Brooklyn? right now! Almost every thermal sail­ just as well have a motor up front, It formed vicious whirlpools that at­ plane on the market today will fly well instead. tacked ladies’ skirts (hooray!) and ripped on the slope, particularly in the hands of Now let's run through a typical slope all the newspapers out of your grimy someone who hasn’t had too much flight and see how it goes. hand (boo!). These little twisters were sloping experience. You don’t need (in Say you’ve located a 300-foot-long no relation to thermals . . . they had no fact, you don’t even want) symmetrical roadcut that faces a big, open valley. The heat energy feeding them. They were airfoils and ailerons on your first couple place isn’t ideal; it’s only about 30 or 40 of slope birds. What you want is a feet high, and the trees on top begin at Continued on page 100 32 R/C MODEL BUILDER I»

The victorious South African team (standing, I to r): Frikkie Roos, Roy Spavins, and Nord Gerneke. In foreground are Noel Drew and Individual World Champion is Anton Wackerle, of Austria. Model is Jack Abbot, Team Manager. the extremely efficient Ame-Dassel D-751.

WO/?Z.Z>SOA P VbAOpHAM PIONSHIPS ^ 1 m ■ 1 ^ PHOTOS BY AUTHOR

By JACK HUMPHREYS . . . The 1979 World R/C Soaring Championships saw some outstanding perform­ ances by the world's best R/C pilots. The author gives a fascinating look at the men and machines present. • The story of the 1979 World Champs in trians who missed 7 of their 24 possible R/C gliders is five guys from South maxes. Africa. Roy Spavins, Frikkie Roos, Nord The speed fliers were not to be denied Gerneke, Jack Abbot, and Noel Drew the individual honors. First place went to refused to be intimidated by the awe­ Anton Wackerle, of Austria, with what is some Dassel "machine” and provided probably the best airplane in the world: the thermal challenge to the speed the Ame-Dassel. Second place went to fliers. With speed flights in the order of Ralf Decker, of Germany, who is prob­ 12-13 sec. and extremely consistent ably the best R/C sailplane pilot in the thermal flying (three missed maxes out world. His airplane is less stable than of 24 duration flights), they overcame most (extremely small tailplane) and the 10-11 sec. speed flying of the Aus- could probably only have been flown competitively by someone of Decker's skill. The origin of the success of the South Ί· Africans was threefold: weather which favored thermal soarers; intense prac­ tice before the meet, allowing precise reading of the thermal signs (particularly the friendly swallows): and most impor­ tant, teamwork! When asked, they attributed their success to their winch, and refused to allow team photographs without it. I would say that the teamwork required to operate what is undoubted­ ly a cumbersome piece of equipment under competition conditions was their Friedheim Schiborr, Germany, was 5th. Ship outstanding achievement. Remember, spans 2.8 m, best speed tim e was 11.4 sec.

Nord Gerneke, South Africa, with his Iron Butterfly. Nord injured his hand in a winch Alex Reinhardt put in the best performance for Canada, was also the youngest competitor at accident on last day. 17. Here he catches his Viking to make a relaunch in duration task.

NOVEMBER 1979 33 \V

Dan Pruss (Team Manager). Steve Work, and Skip Miller of the U.S. Terry Koplan and Steve Work, both of the U.S. team. Terry flew a team. Steve was 19th, flew a Bird of Time. Craft-Air Viking, placed 23rd overall. U.S. was 4th in team standings. unlike domestic contests, in this event Africans never winched their own air­ the other members of the team. I recall the competitors must set up and dis­ planes; another member of the team watching one of their launches that had mantle the winch for each flight and operated the winch. In these conditions a real potential for disaster. Spavins was within a strict time limit. The South one must have complete confidence in up for the second last distance flight but released prematurely about 20 meters high. The team reacted immediately so that the launching equipment was all prepared for a second try by the time Spavins got the airplane down. With an elapsed time of 1:15 of the 4 min. usable working time, he relaunched. Another premature release! Now the pressure was really on, but the team reacted quickly and efficiently to set up the second relaunch, which after adjust­ ments to the hook was off with barely 30 seconds to spare. It was while watching these two launches that we realized that under this extreme pressure no voices were raised and no one appeared ex­ cited, and we knew that Jack Abbot and the boys had a first-class act underway. Oh yes, Spavins maxed the flight! The Austrians put on such a massive display of technical prowess and Ralf Decker, Germany, flew this scale-like ship The Japanese team. I to r: Hasegawa, machine-like teamwork that for a time, to 2nd place overall, missed 1st place by a mere Kawamura, and Tsuji. Ships on ground have 2 points in over 14,000! extreme dihedral, others are Aquila Grandes.

The 6th place British team, I to r: DaveWorral (7th); Nick Neue, Team Manager; Neville Mat­ Roy Spavins, South Africa, placed 3rd with tingly, Hand Tower; and Neil Webb (35th). Fully sheeted surfaces on all models. his "Yellow Bird." Best speed time 12.4 sec.

34 R/C MODEL BUILDER Members of Gruppe Dassel, I to r: H. Sitar, H. Eckman, A. Wackerle. Seven identical Ame-Dassels, flown by the Austrians. Uses composite W. Sitar, and H. Klotz. Austrian team was 2nd. construction throughout. Note ultra-slick finish.

the greatest concern was that the day of the individual modeler was past in F3B. Flying identical airplanes in an identical way, dressed in identical red track suits. Gruppe Dassel was indeed intimidating. It is fortunate for the future of F3B that they did not run away with the contest, showing that individual effort at the building board, combined with team­ work at the contest, is still competitive. The most impressive airplane was the Ame-Dassel D-751. Looking more like a slope pylon racer than a thermal glider, this machine posted a 9.5-sec. speed flight but was able to thermal on very light air. The low aspect ratio wings (10:1) barely over 2 meters in span (2.115) are made with an epoxy-glass The 14th place Japanese team of Shuji Kawamura, Masami Tsuji, and Masaru Hasegawa. Ship skin over blue foam. The wings are on left appears to have flaperons and fully sheeted wings. formed in a female epoxy mold and come out at 220 gr. each, with a magnifi­ speed course deserves mention. They more exciting flying than we Americans cent finish. No spars are used, and ballast come off the line in front of base A, do a is carried in tubes in the wings. The tail is are used to. Their airplanes derive less 180° turn at altitude, establish their line from directed free-flightsthan from full- all-flying and the fuselage is an epoxy for the course while coming back, roll fiberglass molding. The rudder and size sailplanes. The challenge is there . . . inverted and begin a dive while coming are we willing to take it up? · ailerons are coupled for thermal flying back upside down. They exit the course and uncoupled for towing and course at about 60° inverted, dive vertically to a SAFE FLYING flying (competition transmitters in Eur­ height of 50 feet, pull out and enter the ope normally have this mixing and course level at incredible speed. They fly coupling/uncoupling capability built- the course almost level, slowing down in). Overall weight is about 1 kg, un­ all the way so that when watching the loaded, with a maximum ballast capabil­ finish, one is almost persuaded that this ity of 700 gr. The wing loading isgiven as is a slow run. Then the time is an­ 28-34 gr/dm2. The wing airfoil section is nounced: 10.3! an Eppler 193, and the canopy is used as an air brake. Amay has explained to me why the The Austrians’ method of flying the Europeans like these rules. This is much

Fredi Schenk (left), Switzerland, and Rolf Girsberger, Team Manager. Teamwork! Nord Gerneke launches, Frikkie Roos operates the winch, For roll control, each wing panel pivots at the root; there are no Noel Drew calls the flight, and Jack Abbot manages the whole ailerons. Makes for an ultra-clean wing. operation. Roy Spavins isat the turnaround.

R/C MODEL BUILDER 35 PHOTOS BY AUTHOR

Best of Show" winner was this beautiful Smith Miniplane by J.A . South, of Middleton, Ohio. Model looks pretty big, and seeing as the full- size Miniplane is fairly small, we'd say the model is larger than 1/4-scale. Looks almost as big as the Bud Nosen Gere Sport in the background.

QUARTER SCALE ASSOCIATION of AMERICA FLY-IN

By DOUG EARLY ... A report on the successful 3-day Mammoth Scale fly-in held in Kentucky, the first of what is to be an annual affair. Some very impressive "Big Ones" were present. • Held at Tom Sawyer State Park in watch every maneuver easily, and for us by Dean Copeland for Byron Originals Louisville, Kentucky, on July 6-8, the folks of the older generation with failing were something to behold. Watching Louisville area R/C clubs, the Kentucky eyes, you can still see these birds at quite Dean perform with the production Parks Department, and QSAA, along a distance. models of the Pitts S-1A, the P-51 Mus­ with its sponsors and donors, held the Another nice thing about these fly-ins tang. and the ducted fan Mig-15 is 1st Annual Eastern Regional Fun Fly-In. is that everything is so casual. No rush­ breathtaking! For a very exciting and thrilling week­ ing, no pressure, just plain relaxed fun. If you haven’t considered building a end, you'll have to attend one of these The pilots seemed to enjoy every min­ quarter-scale model as yet, after watch­ quarter-scale get-togethers! If you have ute, and so did the crowd of spectators. ing the demonstrations of what these never seen one of these "big ones” fly, You could feel the excitement in the aircraft can do, you’ll be convinced that you are in for a treat. Watching one of crowd as they watched the pilots per­ this is no fad, but a whole new aspect of these big birds take off, climb into the form various maneuvers at random. modeling. Ed Morgan and the QSAA blue, and do a slow roll (and I do mean Applause was readily given! The pilots (Quarter Scale Association of America) s-l-o-w!) is absolutely fantastic! No felt all their labor was worth every boys are to be commended for their hundred-mile-an-hour flights, just good moment. work in promoting this typeof endeavor. slow scale-like speeds where you can The demonstration flights performed It seems to work out just great and is just

Ray Hostetler, known for his excellent finishes, discusses fittings on The two Skybolts belonging to Ray and Wendell Hostetler. Wendell's his scratch-built Skybolt. received the award for Best Biplane.

Dean Copeland thrilled everyone with his exciting demonstration flights of the Byron Originals Pitts (see review on p. 22, this issue), P-51 Mustang, and Mig-15. In addition. Dean received the Best of Scale award with his Pitts. Note electric starter with extension shaft for the Mig.

36 R/C MODEL BUILDER C.D. John Sullivan, QSAA, and the sponsors and donors of the fly-in for putting on such a thrilling show. It was a super weekend for everyone. As for myself. . . well, I can’t wait to get started on my first quarter-scaler. Yep, I’ve been bitten! Like I said before, if you haven’t attended one of these gatherings, plan to do so. You’re in for a real treat! WINNERS BEST OF SHOW & PERPETUAL TROPHY Jim South. Middleton, OH “ Smith Miniplane’’ scratchbuilt BEST OF SCALE Dean Copeland, Omaha, NE “ Pitts S-1A” Byron Originals Awards for Best Finish and Best WW-1 were won by Sonny Abrams with this Jenny, scratch BEST MULTI-ENGINE built from Bud Nosen kit plans. Uses a chainsaw-type engine (maybe a Roper 1.90?). Bill True, Louisville, KY “ Cessna 310" Nosen kit BEST BIPLANE Wendell Hostetler, Orville, OH “ Skybolt” scratchbuilt BEST WW-I Sonny Abrams, Louisville, KY “ Jenny JN-4" scratchbuilt Nosen plans BEST FINISH Sonny Abrams, Louisville, KY “ Jenny JN-4" scratchbuilt Nosen plans BEST MILITARY Dave Platt, Plantation, FL "Bucker Jungmeister” own kit BEST MECHANICAL ACHIEVEMENT Vince Mariani, Findlay, OH “ Fleet Bipe” Concept Models kit BEST SCRATCHBUILT PRE-1940 Merlyn Graves, Downers Grove, IL “ Super Stearman” scratchbuilt BEST SCRATCHBUILT POST-1940 Merlyn Graves won the Best Scratch-built Pre-1940 award for this Super Stearman. Similar Gordon Void, Louisville, KY ship in background belonging to Joe somebody...can't make out all of his last name. Sorry! "Stinson Voyager” scratchbuilt BEST STAND-OFF SCALE the thing we need right now. and Beautiful" models. Tom Kuhlman, Findlay, OH There were many new and exciting With the exception of a little drizzle “ Pitts S-1A" Byron Originals kit things to see and talk about. New on Sunday morning (the Ohio Valley is BEST JUNIOR ACHIEVEMENT building techniques, new engines, unpredictable even in July), the fly-in BEST POWDER PUFF coverings, and new innovations (I saw a had beautiful weather the entire week­ No entries door stop used for choking the engine end. This made for lots of great flying. MINT JULEP BEST STAND-OFF outside the cowl). It was interesting to There was a powered hang glider, SCALE AWARD be able to walk around talking with demonstration and even free hot-air Dave Platt, Plantation, FL various fliers about their aircraft. Most balloon rides! These fellows thought of “ Bucker Jungmeister" own kit competition flying events have a time everything! They even raffled off the element and much pressure involved, in beautiful fully-built Byron Originals Pitts which the flier doesn’t have time to S-1A along with other goodies at the end converse with anyone easily. Not so at of the activities Sunday. the 1/4-scale fly-ins. Here they are relaxed and willing to spend time show­ Much praise has to go to all the ing off their craftmanship on these “ Big workers of the Louisville area R/C clubs.

Powerplant details on the Byron P-51 flown by Dean Copeland. Uses Bill Britcliffe brought this Nosen Gere Sport from Houston, Texas. a hot .60 mounted on a Byro Drive speed reducer. Powered with Quadra engine and EWH prop.

NOVEMBER 1979 37 F/F Grand Champion at the '79 SAM Champs was Bruce Norman Don Bekins was the overall R/C Grand Champion, shown here (again!). His wife Leslie was not far behind, either! holding two sizes of scaled-up Gas Birds. exhibitors and visitors alike. By twelve o’clock, it was hard to find a space for a display table. Noted this time was a considerable amount of sales, as compared to swaps. p m m m Dave Brodsky, of San Jose, reported he PHOTOS BY AUTHOR had many sales of engines from broken collections he had acquired. This was no By JOHN PONO doubt due to SAM members looking for good "runners” to use in their airplanes. Also to be noted were many displays of • For the first time in the history of SAM official recorder for three days when he engine manufacturers, such as Herb Championships held in the Rocky found the wind had left no models in Wahl (Brown Jr. Motors), Bruce Chand­ Mountain area, the "Lucky 13th” was flyable condition! That’s what is called ler showing his Black Knight engines, staged at Salt Lake City, Utah, July 24 dedication!! John Morrill (Simplex Motors . . . a new through 27. In many respects, the In a write-up such as this, probably the one!), Karl Carlson with Vivell .35 en­ weather resembled Denver (the usual best way to describe the activities is to do gines, Bob Bowen's introduction of the site) in that if you didn’t like the weather, them individually. Hence, if some things long-awaited Shereshaw Bantam Twin, wait fifteen minutes. As Mark Fechner seem a little disjointed or out of order and Mark Fechner with his “ Slag” pointed out, one can expect the wind chronologically, it is because we would engines (Thor .29 engines). Even Pond from all directions during the course of like to take the time to properly inform was there with his plan collection! This the day. the reader what transpired. made for a varied and interesting exhibi- Hosts for this important meet in the MECA GRAND COLLECTOGETHER tion for the people who were not annals of the Society of Antique Model­ Probably one of the best things to hit particularly interested in swapping or ers was the SLAM club (Salt Lake Antique the SAM Championships was the re­ procuring an engine. Modelers), with Lin Flaslam taking on storation, after an absence of two years, the dual job of Contest Manager and of the MECA Grand Collectogether on The wrap-up, staged by Dick Dwyer Contest Director . . . no mean feat! Lin Monday, July 23. Most SAM members (one of the MECA Collectogether or­ was sharp enough to realize he couldn’t belong to MECA and vice-versa, so ganizers), featured the awarding of handle the R/C end of things, so Doug when Mark Fechner announced the prizes for best exhibitions to Carter Gorton was drafted. Doug, incidentally, formation of a Grand Collectogether at Watts (1st), Tim Dannels(2nd),and Mark did a complaint-free job in running his Salt Lake, this was hailed by one and all. Fechner (3rd). Following that, many first O.T. R/C meet. It certainly did simplify things with all prizes were given out to the lucky ones. As Lin pointed out at the Annual SAM activities being held at the Ramada Inn. SAM BEAN FEED Victory Banquet, he would have been Monday morning, July 23, featured In line with keeping the activity going, lost without the able assistance of Jack the start of the Collectogether, with the SAM Annual "Bean Feed” was held Defond. Defond, of Cheyenne, Wyom­ Vicki Fechner holding down the admit­ at 6:30, following the close of the Grand ing, where he suffered the loss of his tance table. Despite the seemingly low Collectogether. home in a tornado, offered to act as pre-entries, the room rapidly filled with As originated by the Denver boys, the

Mitch Post and his Anderson Pylon, just before putting up the Ray VandeWalker brought this neat Brown Jr. powered Scientific winning flight in Fuel Allotment Antique. Streamliner. Harry Gould was indispensable helper.

38 R/C MODEL BUILDER Nick Nicholau, of SAM 30, flew this Privateer in the R/C events. Robert Schmidt's R/C Kloud King sports a very suitable decal on the Nick's models keep getting prettier all the time. side, wouldn't you say? Annual Bean Feed has previously been The only SAM business meeting held as many years as he wanted at the $5 rate an outdoor affair, generally staged on once a year occurs at the SAM Cham­ prior to the end of this year. The life the flying site. This year, the feed was pionships. This year, at Salt Lake City, membership rate of $75 was also to held in the Ramada Inn, on the second was no different. Held on Wednesday remain in effect until July 1, 1980. floor . . . indoors! This has occurred evening, July 25, a considerable amount Treasurer Banaszak later reported he once or twice before, so no one really of business was transacted. had received applicationsforsix new life complained about the indoor site. The Among the first was the raising of the members. only drawback, of course, was the lack of annual SAM dues. This was brought Lin Haslam then proposed changes to room; as a result, attendance had to be about by the mounting costs of the SAM the existing system of rules. After con­ restricted. Truly a shame for those who newsletter, “ SAM Speaks." The Presi­ siderable discussion and amendmentsto enjoy the camaraderie and were unable dent stated he had suggested to new amendments, the final motion as ap­ to attend. SAM Speaks Editor, George Armstead, proved looked something like this: As usual, the Bean Feed also was the that the publication be put on a quarter­ 1) All rule change proposals must be vehicle for late announcements regard­ ly basis instead of a bi-monthly rate. As received by the Contest Rules Coordi­ ing rule changes, special events, starting approved by the membership, the new nators (Free Flight and Radio Control) times, and in general, good advice on dues will be $10 per year. Life member­ no later than July 31 of the calendar year how to get to and find the parking areas ships were to be raised from $75 to $100. to be voted on for the following year’s on the field. In short,anythingtoensure The members also voted to make the regulations. a good time. increase effective July 1, 1980, with the 2) All rule changes were to be pub­ ANNUAL SAM BUSINESS MEETING provision that a member could pre-pay lished in the September issue (or third

One of the more unusual "slag" engines, a Buzz .60, by Karl Herb Wahl launches his favorite model, a Comet Clipper, powered Spiel maker. Flown in a Buccaneer C Special. by one of his Hurleman engines.

Carl Cogar Sr. winds his Lanzo Stick in the shade to protect the Larry Clark, hiding under hat, flew a Miss Delaware in the Antique rubber. Carl won Rubber Cabin, Rubber Stick, and Rubber Scale! event. Powered by an Ohlsson .60.

NOVEMBER 1979 39 Bill Cohen shows how he cranks the Forster .99 in his Anderson Not too many Clippers with inverted engines. This one, with a Pylon from his wheelchair. Bill hails from So. Cal. Madewell .49, won 5th in 30 sec. Antique for Walt Johnson. quarter issue) for vote. Vote to be using these engines. Ohlsson himself officers would be held via the next tabulated and results published in the kept up a running commentary on the MECA Bulletion to be issued to all December or fourth quarter issue of various phases of engine manufacture. members. Dick announced he had a SAM Speaks. Among the early films were pictures of slate of those willing to serve in each The Engine Review Committee Irwin as a slim young man. Looks like district. During the discussion, it was headed up by Mark Fechner then an­ middle-age spread has gotten most of brought out that additional nominations nounced that the Simplex 25 engine, as us!! could be proposed by members through produced by John Morrill, met all re­ MECA BUSINESS MEETING their District Directors. quirements of an original ignition en­ Although not an official part of the An animated discussion followed on gine. Henceforth, the Simplex 25 will be SAM Champs activities (MECA is a the status of the MECA Constitution, regarded as an acceptable Old Timer separate organization), the Model En­ which appears to be in limbo at present. ignition engine. gine Collectors Association held its Dwyer stated that the proposed consti­ In response to a query by the Presi­ annual business meeting at the Ramada tution would be printed in an upcoming dent, Tim Banaszak, acting on behalf of Inn on Tuesday, July 24. The meeting was issue of the MECA Bulletin for vote by Midwest Vice President, Woody Bartelt, headed up by Dick Dwyer, who was the membership. Meanwhile, discus­ announced that the 1980 SAM Champs acting on behalf of Hank Hilscher, sion centered on how business was to be were tentatively scheduled for either National Coordinator. SAM President conducted; i.e., by precedence, agree­ Wright-Patterson AFB. Dayton, Ohio, or Pond gave a short welcoming speech ments, etc. Chanute AFB at Rantoul, Illinois. indicating the pleasure of having the Although other business was brought At this point, President Pond an­ MECA Grand Collectogether in connec­ up, the foregoing represented the nounced that Bob Larsh, of the Central tion with the SAM Champs. majority of business transacted. At the Indiana Association, was circulating a Dwyer announced that theelection of close of this meeting, the writer ex- petition to restore glow engine usage to the free flight rules and would appear in SAM Speaks for vote. Pond stated this would also be a motivating factor in getting the COFFC to manage the SAM Champs at Wright-Patterson AFB. This argument was rebutted by Joe Beshar, past President, who felt ignition engines should be the only motive power for Old Timer gas jobs. In any respect, the matter will be resolved by membership mail vote. At the close of the meeting, Irwin G. Ohlsson then showed his 1936-38 films of the early days of engine manufacture. Featured were assembly sequences of Karl Tulp likes them big. His latest is a 1-1/2 size (12 feet) Lanzo Record Breaker. A real fair the Ohlsson Miniature, plus flight action weather model, it failed to place in the top 5 in R/C Texaco.

See. sez Mark Fechner, Thor .29's do run. Dick Dwyer hangs on Karl Tulp fine tunes the dwarfed Merco .60 in the 12-ft. Lanzo incredulously to Zipper fuselage. while son Frank holds on. That sure is a lot of Monokote...

40 R/C MODEL BUILDER "Happy Times" Loren Schmidt shows off his latest project, a Lanzo Joe Beshar and Ed Rangus take a break after an hour of trouble­ Stick. Plans in September '79 R/C MB. shooting ignition problems in Ed's beautiful Yates "Herky." pressed the hope that the next MECA wind. The trick in getting lift was to fly Immediate lubrication was the order of Grand Collectogether would be held in when there was a change in the wind the day. the general area of the SAM Champs direction. lack Jella and )oe Beshar successfully scheduled for the Midwest District, On Thursday, the strong wind had the flew both free flight and radio control. either at Wright-Patterson AFB or Cha- modelers grounded for two hours. The Jack scored firsts in R/C .020 and Class A nute AFB. strong west wind finally changed to F/F Pylon events, while Beshar regis­ THE CONTEST north. This was the signal for those tered two seconds, one on each side of The SAM Champs, spread over three fellows flying in Unlimited Antique to the fence. This trend appears to be days, featured the most bewildering get in their flights. Sal Taibi, who invari­ gathering more and more momentum as assortment of weather. Things didn’t ably flies early in the morning, was beat both styles of flying are being offered at start off too promising, with a heavy out in the afternoon by Mitch Post. contests. downpour on Sunday and Monday, Of all the tough breaks to suffer, Ed The much-feared Anderson Pylon (an making the salt ground somewhat boggy Rangus had two good flights with his early 1937/38 design) failed to dominate in areas. good looking Mel Yates "Herky," and the field. Only Mitch Post was able to Noted was the early morning wind then simply couldn’t get the Orwick score with one. In talks with Sal Taibi, (east) that drifted the models toward the running for the third flight. Despite a who also has one, it was his opinion that Great Salt Lake. On Thursday, five flying complete teardown and replacement of the model was highly overrated and felt scale models were lost in the lake and the ignition system, the team of helpers his Powerhouse design was equally were not recovered. Phil McCary re­ never did resolve the problem. Tough! competitive. (Columnist note: Sal is ported he had seen his model floating in Noted were a considerable number of telling us this after the tremendous the lake (how could a model eversink in fellows only rinsing their motorcycles string of wins run up by the Power­ all that salt?) and had to make plans to down. The warning from Contest Man­ house!) hire a boat. ager Lin Haslam was to scrub cycles One facet of the contest was rather In the R/C Texaco event, with models down thoroughly, otherwise the corro­ disappointing to this columnist, in that it climbing to 2,000 feet altitude, 180 sive action of the salt would set in seems the same old designs seem to win degree differences in wind direction immediately. Even the writer noted the all the time. Very few "new” designs were noted between this and the ground buildup on the wheels of his models. Continued on page 105 cJIAiss * PHILADELPHIA

OLD TIMER Model of the Month Designed by: Maxwell Bassett

Drawn by: AI Patterson Text by: Bill Northrop

MISS PHILADELPHIA Wow! Subtract 37 from 79 and what do you get? It’s 42 years since we first read Very nice Miss Philly by Bob Dittmer, a local So. Cal. modeler. an ad in the May 1937 issue of M.A.N. First flew as F/F, now sports Kraft radio and O.S. .40. about Scientific’s kit for Maxwell Bas­ sett's “ Miss Philadelphia” . . . $9.95 with under our bed . . . and this was done a small farm/college town. The stab had wheels, bamboo paper, dope, and igni­ without moving the bed! Taking advan­ to be built into the fuselage, and then we tion hardware. tage of the shaped and notched leading were faced with the problem of cover­ As mentioned on previous occasions, and trailing edges, we built the wing "in ing the stab and fuselage without any­ this was our first gas model, built in the air,” and managed to do it without thing to glue to where the two surfaces 1937-38, and quite a switch from small acquiring warps. met! As we recall, the fuselage was left stick-and-tissue rubber models. Lacking Toughest part of the construction was uncovered in that area. Today we would a large, flat area on which to build the the stabilizer. Steaming and bending the add some sheeting to solve the problem. fuselage sides, we received our parent’s 3/16 square spruce outline was a monu­ Another hint would be to use three permission to use the hardwood floor mental task to a young, lone modeler in Continued on page 105

NOVEMBER 1979 41 FULL SIZE PLANS AVAILABLE - SEE PAGE 116 42 R/C MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 116 NOVEMBER 1979 43 DUCTEDwfans By BOB KRESS . . . Ducted fans are rather demanding of precise design, but when properly done, are capable of amazing performance. This is the first of three articles dealing with 1/2A ducted fan designs. • This article is another in a seemingly Fig. 2 contains all points tested with near endless series which reflects my learning perfect inlets, either a bellmouth or a process in the ducted fan field. The short, open cowl, which is available from subject this time relates primarily to my company, Kress Technology, Inc. curing performance problems of the Other less perfect inlets were tested as production Midwest A4D Skyhawk will be discussed later, but at this point powered by the RK-049 AXIFLO fan. we are only concerned about how well To start with, the prototype Skyhawk various rotors performed holding the built and flown by Nick Ziroli and inlet constant. The tailpipe on the jet ’ powered by the author’s RK-049 AXIFLO pod was 4 inches long and had an exit prototype flew quite well nearly two diameter of 2.84 in., close to the "zero years ago at a takeoff weight of 30 oz. contraction” tailpipe diameter of 2.77 in. Needless to say, when the production The data points of Fig. 2 are super­ Skyhawk would not take off at a weight imposed on a basic thrust coefficient of 27 oz.. Midwest was somewhat both­ (Ct) grid. Thrust coefficient is defined ered. Thus began a chain of tests, as: FIG . 1. Air inlet details on the Midwest calculations, and changes which finally CT = 2.074 T/P Ό" X 104 Skyhaw k. yielded a gratifying success, although T = thrust in lb. not without aggravation and confusion. D = fan diameter in inches mean section lift coefficient (C l) lines on When a ducted fan jet model does not p = .002378, sea level air density in the chart. The explanation of this work is take off, one quite naturally, and usually slugs/cu. ft. somewhat beyond the scope of this correctly, suspects that the thrust is not V = revs, per second = RPM/60 article, but the results are shown. adequate. I previously emphasized Basically, for a ducted fan, the thrust Turning now to the data, the following correct inlet design, and the Skyhawk coefficient is a function of the rotor/fan observations and conclusions resulted inlet system shown in Fig. 1 was sup­ design and remains constant as the rpm from the testing: posed to be the epitome of correctness. varies. In other words, as you vary the 1) The original hand-made epoxy and As we shall see later, the inlet looked brake horsepower fed into a fan, it glass RK-049 rotor (diamond symbol) ran great, but had one major defect. At any changes thrust as a square function of at 19,700 rpm at an efficiency of roughly rate, the initial feeling was that the inlet rpm along a constant C t curve. In fact, 56%, with a thrust of 14.5 oz. Thrust was near perfect and we should look first one can rewrite Eq. 1 to state just that: coefficient was .92 and blade mean at fan performance. Thus began a series (Eq. 2) section lift coefficient .89, both quite of thrust stand bench tests of RK-049 fans T = C t PD<77 V2.074 x 104 = constant high values. This rotor flew the 30 oz. with various rotors and inlets from x7? 2 A4D Skyhawk quite well. which I learned a great deal that is of interest. If the engine brake horsepower vs. 2) Tests of the first production rotor ROTOR PERFORMANCE rpm curve is known, as for the TD .049 in (circle symbols) revealed what amounted Fig. 2 is a summary of all of the RK-049 Fig. 2, one can superimpose constant to an overspeed condition, 23,000 rpm rotor tests conducted to date . . . some rotor efficiency and constant blade with thrust dropping to 12-13 oz. This 42 in all! All test data points on Fig. 2 were carried out on one of Nick Ziroli’s TABLE I 1/2A Heinkel 162 jet pods using the ball- RK-049 AND RK-40 AXIFLO ROTOR TIP REYNOLDS’ NUMBERS bearing-wheeled cart, rail and spring Fan Engine RPM Riin. Clin. Rn RK-049 Cox TD .051 20,000 1.5 .625 66,700 scale test rig shown in the Fig. 3 photo. 233,000 RPM was by a Pro-Tach. Fuel used was RK-40 K&B6.5CC 18.000 2.55 1.100 Cox Racing Fuel containing 30% nitro.

l · n

BELLMOUTH INLET (OPEN SYMBOLS) !X

He 162 INLET (SOLID SYM80LS)

d ______j \ _ r “

RK-049 AXIFLO FAN

He 162 JE T POD

COX RACING FUEL (30% NITRO)

FIG. 2 - RK - 049 AXIFLO ROTOR TESTS 44 R/C MODEL BUILDER at 21.000, so that the rotor would ride up onto the peak at forward speed. Just like the prototype rotor. 4) The second production rotor (Mal­ tese cross) turned out to be right on at 14-1/2 oz. at 20,300 rpm. Tip angle was 27° and airfoils were, as specified, very nice renditions of the NACA 4410, for which the shape is shown in Fig. 2. I suspect that the TD .049 may have been varnished up a bit in this test and could have done better. Also, my thrust stand accuracy is about ± 1/2 oz. At any rate, the die was cast, so to speak, and I quit rotor testing while I was still ahead. My choice of the NACA 4410 airfoil was based on the fact that I had available excellent low Reynold's number lift and drag data for the NACA 4409, essentially the same airfoil except 1% thinner. I knew the NACA 4409 to be well behaved FIG. 3. The author's thrust test stand, accurate to about 1 /2 oz. at RK-049 tip and mean section speeds. A short digression into blade tip makes the point dramatically that rpm along a constant C t line. This suggested Reynold's number effects on ducted fan can fool you; it doesn't necessarily that the engine in the lower bunch was performance is probably in order at this equate to thrust. As a matter of fact, one not putting out full power. This turned point. As we have all been taught, can generate extraordinary rpm’s with a out to be the case, due to vibration, as Reynold’s number effects can cause flywheel with no thrust at all! This rotor will be explained later. Rework of the dramatic disasters in glider stall charac­ was particularly bad in flight, since the engine produced the higher bunch of teristics. We are used to this happening engine, already “ over the top” of the points clustered at a thrust of 15 oz. at with 6-inch wing chords at 10-15 mph peak of the horsepower/rpm curve 21,800 rpm. These rotors were flown and speeds. What is not always obvious to statically, would overspeed even more performed well, but were still running the modeler is that such effects can at forward speed. too high in rpm to suit me. Although the occur at speeds of hundreds of feet per Close examination plus some calcula­ tip blade angles of these rotors were second if thewingchordissmallenough. tions revealed a very embarrassing state 27-28 degrees, the tip camber and The equation for calculating Reynold's of affairs (and costly, since 2,000 rotors thickness were too low. What I wanted number is given below: were scrapped). My rotor drawings to see was a good thrust level in the (Eq- 3) Vp called for a tip section blade angle of 21 vicinity of 20,000 rpm, just short of the RN = -yr- where degrees, which, due to a calculation peak of the TD horsepower/rpm curve error (discovered during one of the Continued on page 114 post-test "what the heck happened” periods) should have been 25 degrees. FIG. 4 AIRFOIL LIFT AND DRAG vs REYNOLD'S NUMBER The prototype RK-049 rotor had a tip angle of 29 degrees, but the production rotor had a tip angle of only 18 degrees. In other words, the production rotor had been built 3 degrees below my drawings in pitch and 7 degrees below what it should have been, which ex­ plained the overspeed. This sent me scurrying to my produc­ tion RK-40 rotors, which fortunately were built at 24 degrees, 3 degrees higher than my drawing and only 1 degree off what they should have been. The first production rotor had one further defect: its airfoil sections were not properly cambered and shaped. 3) While awaiting delivery of the second production rotors, I experi­ FIG. 5 FAN ROTOR EFFICIENCY vs REYNOLD'S NUMBER mented quite successfully with hand remolding of rotors and recasting. The square symbols on the chart were for on^ single hand-reworked rotor where I thermally repitched and recambered the blades with a heat iron. They were also slightly built-up in section with balsa, which adheres to the nylon very well using cyanoacrylate cement. The recast rotor points were for rotors thermally reset in an aluminum thermal die made from plaster cast masters of one blade of the hand-reworked rotor. Eighteen of these were produced for flight test purposes. Data for these rotor tests (squares and triangles) fell into two distinct bunches,

NOVEMBER 1979 45 R/C MB's Debbee Holobaugh shows off Larry Renger's newest, the Macchi MC 72 seaplane by Tony Naccarato for 1/2 A C/L Schneider "Cheap Shot." Alas, it had problems. Fascinating tale of woe in text. Cup racing. Does 80 mph from a standing start! thrice? Post-mortem analysis finally revealed unto me a great truth. I had designed an unflyable airplane. The culprit in this 1 2 mystery is the wingtip configuration. I "e / -A inadvertently stumbled upon a tip design which completely negates rudder func­ By LARRY RENGER p h o t o s b y a u t h o r tion, a somewhat less-than-desirable feature on this particular model. The tips • Gee, folks, I used to think that I was a we go, fuel it up and light its fire, get prevent the model from yawing, but really hot shot model airplane designer. ready . .. LAUNCH! Up it goes, yup, they simultaneously reduce the effec­ Unfortunately, the last airplane I de­ looks like it’ll do power loops, better tive dihedral. Hey, gang, guess what signed and built was genuinely unfly- turn it .. . Hmmm, no response, may be a makes a single-channel model con­ able. I did, however, learn a valuable trim problem, so it wants to roll the trollable? The rudder yaws the model lesson, so I'll tell you about it. other way. Over on its back now, stick and the dihedral reacts to the skewed I wanted to do a high performance hard over in either direction; no re­ airstream like ailerons to roll the model. single-channel .020 model using my Ace sponse. Down it comes, and SPLAT! Surprise! Baby-Twin pulse proportional radio Well, after rechecking the radio, Well, that was the bad news. The good system. The engine was a Tee Dee .020 increasing the rudder throw, and appli­ news is that those same effects can be and the wings would be Ace tapered cation of epoxy and toothpick splints to put to good use on other models. This foam panels. Since it would be quick to multiple compound fractures, it is ready wingtip design ought to give your 2- build, fast flying, and very inexpensive, I to go again. Sure enough, same scene. channel aileron and elevator model called the design the “ Cheap Shot." Would you believe, bright lad that I am beautiful axial roll performance. Might Construction and finish all went well (stubborn), I did the entire routine Continued on page 87 and I ended up with a clean, solid model weighing 8 ounces complete with en­ gine and radio. I glide tested it and found that a bit of tail weight was required to trim the glide. The airplane glided really nice and straight. So, on to powered flight. I figured that it would tend to climb fast or even loop, with thrust being somewhat greater than weight, but what the heck, you can always roll and circle or do horizontal eights to get out of trouble. The radio was range checked and the engine run a full tank to clear it out after Innards of Tee Dee and Medallion .049's. Tee Dee on left has clear throat carb, big crankshaft long disuse. All checked out A-OK. Here port, twin ports in cylinder. Adds 3000 rpm, but drinks more fuel, too.

Darryl Stevens built this 2-channel hot rod with balsa sheeted foam The standard (unthrottled) version of the G-Mark .06 being imported wings. Pacifier tank and 5X3 prop make it very fast. by Cannon Electronics. Very nicely built. 46 R/C MODEL BUILDER PHOTOS BY AUTHOR

Hydroplane winners at District 8 Champs (kneeling, I to r): John Monoplane and Deep Vee winners (kneeling, I to r): Ron Erickson, Moss, 2nd in .21 Hydro; Randy Seiser, 1st .21 Hydro; Gary Jensen, 1st in .40 Mono; Je rry Dunlap, 1st in .21 Mono. Standing, I to r: 3rd in .40 Hydro; Ron Erickson (standing), 1st in .40 and .60 Hydro. Vic Roberts, 1st in .40 Deep Vee; Bill Hornell. 2nd in .40 Deep Vee. R/C P O W ER By JERRY DUNLAP SOMEONE ACTUALLY BUILT ONE OF a satisfying feeling to talk with this young THE BOATS REVIEWED IN R/C MB lad and his father and hear about their While attending the NAMBA District 8 experiences with the SkeVee 10. I’d like Championships in Kent, Washington, to hear from others who have built boats held July 21 and 22,1 had a rather unique after reading reviews in the magazine. experience. A gentleman and his son BILL HORNELL SETS UNOFFICIAL approached me and asked if I was the STOCK OUTBOARD TUNNEL same Jerry Dunlap whowrotethe review COMPETITION RECORD of the Dumas SkeVee 10 that had ap­ When is a record not a record? For peared in Model Builder. I pleaded those of you who actively race in the guilty to their inquiry and asked why stock outboard tunnel class, the follow­ they were interested in that information. ing report might be of interest. On July As it turned out, they had built the very 4, at the Longview Firecracker Classic, same boat and installed an O.S. Max .10 Bill Hornell, Renton, Washington, ran after they had read my review. The his Dumas fiberglass Hotshot 21 at 1:52.3 young lad (I'd guess his age about eleven on the NAMBA .9 mile competition oval. or twelve), really thought the boat was This is the fastest time ever posted for a lots of fun to run. He asked me a whole stock .21 powered outboard tunnel. batch of questions about the boat I’d Hopefully, the NAMBA Board of Direc­ reviewed and was also very interested in tors will approve the new outboard my .21 vee. The boy’s father said they racing rules submitted by this writer at had a good time building the boat and their meeting during the NAMBA Nats he was most pleased with the results. It in Seaside, California. Even though Bill’s was pure neglect on my part not to get efforts will not gain official recognition, their names because I’d love to have they nonetheless do deserve special include them in this article. mention, since it was three seconds Knowing that someone had built a faster than the record set last year by Ed boat because they read about it in an Fisher and his hybrid tunnel/hydro. article I wrote and were having a good Bill has done an extensive amount of time with it made me feel real good. work on the bottom of the sponson Unfortunately, I don’t receive much runners to get his Hotshot to turn feedback from the articles I write and smoothly and run cleanly down the For the second year in a row, David Jensen,; sometimes begin to wonder if anyone straights. The sponson bottoms were 6th grader from Seattle, won Top Junior ever does try some of the things I’ve carefully trued and all low spots filled Boater award in NAMBA District 8. His dad, written about. It really provided me with and block sanded. Running rails were Gary, serves as pitperson.

Bill Hornell lowered his own record in Scale Hydro to 1:23.3 at Dist. Frank Ward left his Deep Vees at home and entered an original 8 Champs. Boat uses twin K&B 7.5’s for power. outrigger canard with a Rossi .60.

NOVEMBER 1979 47 Randy Seiser's Gator 60 was 2nd in .60 Hydro class. Uses an OPS Bill Hornell, on the outside, duels with Jack Peters in the .40 Deep .65, really scoots. Vee class. Bill placed 2nd in class.

placed along the inside edge of the the sponson bottom and sides. The boat and ponds with me since he was just a tunnel and along the outside chine. is in complete compliance with the new baby. I think he was about three when Spray rails were added alongthe sides of rules proposed for the NAMBA stock he first drove a model boat, and this last the sponsons. A most interesting feature outboard class. Bill did more than just set year he has been doing some of the Bill added is the air deflectors placed in an unofficial record at Longview on the driving while I took photos of boats I was front of the picklefork. Bill inset the Fourth of July. He also won the heat reviewing. engine 1-1/2 inches and the engine is racing portion of the day’s activities with During the winter building season, I mounted so that the prop is surfacing. four first place finishes. Bill then backed put together a modified Dumas wood The engine turns a reworked J.G. G-22 up this fine performance by winning the Deep-Vee 40. The hull was modified by that has had some of the trailing edge Outboard Tunnel Class at the Olympic cutting the sides down and then rede­ removed from the hub. Trim tabs like District 8 race on July 14. Congratula­ signing the deck. The boat came out those used on deep-vees have been tions to Bill Hornell for this outstanding with a length of 30 inches and had lots of affixed to the back of the sponsons. effort in the .21 stock outboard tunnel beam. A K&B .21 inboard was installed Dubbed “ Worn Worn, Too,” Bill’s class. Hopefully, we’ll have an official and the boat proved to be fairly quick Hotshot is a good example of what hours class for him to set a record in very and extremely stable. I told Paul the boat of experimenting and making small shortly. was his and that he could race it when­ changes can do to make a kit boat per­ NUMBER ONE SON ENTERS ever he felt he was ready. Paul allowed form. Bill used lots of ideas that worked FIRST MODEL BOAT RACE me to race the boat the first couple of on his deep-vees in adding thestrakes to I suppose I could be accused of races and I even placed second in a getting short of material when I have to sixteen-boat field of Open Deep-Vee at start writing about my son entering his the Longview Firecracker Classic. Dur­ first modef boat race. But I’m really ing breaks in these first races, Paul would rather proud of this because Paul, age practice running the boat. seven, has been going out to the lakes It was at the NAMBA District 8 race in Olympia, Washington on July 15 that Paul decided he was ready to enter his first race. I think I was more nervous than he was. He did a fine job in each of the heats he raced and managed to place third out of a four-boat field. In his last heat he even forced Ron Erickson, the NAMBA record holder in the class, to cut some buoys in one turn. But since Ron was in the process of lapping Paul for about the second time it didn't make any difference. Ron still won the class. Paul had a good time. Dad was relieved and we’re looking forward to more races. SEATTLE MODEL YACHT CLUB HOSTS NAMBA DISTRICT 8 CHAMPIONSHIPS Bill Hornell holds his unofficial record holder The 1979 NAMBA District 8 Cham­ for the Stock Outboard Tunnel class. It's a Rear view of Bill's Hotshot, showing the ride pionships were conducted July 21 and 22 Dumas f iberglass Hotshot .21. plates on the back of the sponsons. at the Kent Lagoon, Kent, Washington.

Front shot of Bill's Dumas Hotshot shows the use of air deflectors. The bottom of Bill's Hotshot has been block sanded and ride Boat was timed at 1:52.3 for .9 mile oval. strakes have been added.

48 R/C MODEL BUILDER Youngest boater in District 8, 7-year-old Paul Dunlap, and Ron Dennis Caines (left) won .21 Outboard Tunnel at Dist. 8 Champs, Erickson hold their boats after racing together in .21 Mono class. Mike Wight was 2nd. Boat is the wooden Excalibur II.

This year’s double points event was second place overall and Ron Erickson Dennis Caines beating Mike Wight by hosted by the Seattle Model Yacht Club, had to settle for third. I ran a modified one second when both tied with 1,300 and Howard Nelson was the Contest Dumas wood Deep-Vee 40, Dave used a points. Both Dennis and Mike ran Director. The two-day event was blessed JVS Vee, and Ron ran his Schoeff Vee. All wooden Excaliber M’s. Bill McCay, a with excellent racing conditions and a three boats used K&B .21’s for power. former New Jersey model boater now good turnout of boats in the seven Ron apparently got all the mistakes living in Federal Way, Washington, used classes raced. The racing was divided out of the way in the .21 class, because a Hughey Tunnel to place third. into monoplane and deep-vees on he ran his OPS .40 powered Wardcraft to The hydroplanes took to the water Saturday and outboard tunnel and first place overall in the .40 monoplane following the tunnels and thirteen .21 hydroplanes on Sunday. class. Vic Roberts, another Longview hydros made this class the largest it has Saturday’s first class was .21 mono- boater, used a cut-down EKIM Deep- been in many years in this area. NAMBA plane/deep-vee heat racing. Since there Vee to place second behind Ron. A K&B record holder, Randy Seiser, Spokane, wasn’t even one flatbottom entered in 7.5 powered Vic’s boat. Bill Hornell used Washington, put together four wins with the monoplane heat racing, it should his Wardcraft with a K&B 6.5 to place his K&B .21 powered Gator to take first probably be called deep-vee heat racing. third. The final results in the .40 Deep- place. Another Gator driven by John This was the smallest class of the event, Vee 5-Minute Enduros showed the same Moss, Puyallup, Washington, placed as only a half dozen registered for the names as heat racing, only with some second and wrapped up the class high five-lap races. A good frequency mix changes in positions. Vic ran four very point award. Bob Hartsock,a member of allowed all six boats to race at one time, steady heats to take first. Bill ran very the U.S. Navy, took third place honors and this made for some excellent heats. fast, but flipped a couple of times and with his Hughey 21. This contest marked had to settle for second. Ron missed The first two heat wins went to the Bob's last race in our area, as he will be almost four minutes of racing in one transferring soon to another assignment. national record holder in the class, Ron heat when he broke an engine. This Erickson. However, Ron became in­ We have enjoyed having Bob compete event features two left turns and made with us during his two-year tour at volved in a pile-up in the third heat and for some exciting corners. flipped, and then cut a buoy in the Widbey Island Naval Air Station and fourth heat. This allowed your friendly Sunday’s competition started off with wish him good luck at his next assign­ race reporter to slip into first place .21 Outboard Tunnel, and the sixteen ment. overall by placing second in three heats entries marked the largest class of the The .40 and .60 hydroplane classes and third in the final. Dave Austin, of contest. There was some very close belonged to Ron Erickson, as Ron used Longview, Washington, moved into racing and the final results showed Continued on page 92

Three .40 Deep Vees round the right turn during racing action at Dist. 8 Champs. Ron Erickson's Wardcraft Vee, OPS .40, won .40 Monoplane class, 3rd in Deep Vee.

Ron Erickson's fine running Gator 40 with K8iB 7.5 won .40 Hydro Another of Ron Erickson's super-fast boats, a Wing Ding 60 with class at Dist. 8 Champs. OPS .65. Took top honors in 60 Hydro class.

NOVEMBER 1979 49 channel in this class. The longer I stay in the game the more polarized I find my view. There is no such thing as a partially controlled class. Either everything is controlled and the boats are all essentially alike, or onesets the size and sail area, then stands back TECHNOLOGY AND CLASS STABILITY During the ensuing 5 years common while the chips, lead, and dacron fly. The In model yacht racing, as in every practice has been to avoid them, but use two common arguments or complaints other competitive sport, the participants anything else that was not explicitly then can be resolved with some simple seek to gain a performance advantage. banned. prescriptions. If you don’t want to build This can be through careful fairing and The one-design classes share the a new 50/800 every year to keep up. then finishing of the hull underbody and its organization wide prohibition against get into a one-design. If you don’t have appendages. It can also be through mercury and uranium. In some cases enough chance to experiment with your intensive efforts in sail cut, set, and trim, only specific materials are allowed, such Newport 12 or Soling, get into a formula or lengthy practice sessions to hone as wood or aluminum for EC/12spars. In class and either experiment or finish tactical skills and boat handling. But the main, however, general dimensional dead last. One simply cannot have it deep down in every skipper’s heart tolerances are coupled with “ approved” both ways. there lies the belief that somewhere hull molds to control vessel size and What prompted this article was a list of there is a gadget or a super-something shape. Should some new material be put "modern technology” that has been he can buy which will give him that edge aboard a boat, and should it be blamed applied to our sport. They seem to fall over the fleet. Often, developments in for the boat's winning ways, the result into a materials category and an opera­ model yachts are reflections of present will be a hasty motion and subsequent tions category. The former must be dealt trends in the big boats we read about. prohibition of the offending chunk of with on a class level, while the latter may These developments are taking more gear by a vote of the indignant class stretch the general AMYA definitions of and more modern materials and trans­ members. In the one-designs, decreas­ what is a radio controlled model yacht. ferring them into the model yachting ing the weight of components means MATERIALS arena. In this column I intend to explore that a larger percentage of the total CARBON FIBER: Now available as a the resulting pressure that such tech­ weight ends up in the keel ballast. The tapered round spar 8 feet long. Also nology can put on existing class stability result is a stiffer boat which presents used as unidirectional stiffeners in hull and briefly touch upon ways that class more sail to the wind and should extract layups to produce functional hulls at 1 rules can respond. more power. lb. and less. The AMYRA presently provides for 2 TITANIUM: A metal being used for jib varieties of classes: formula and one- The development of one-design class clubs and main booms. Light and strong, design. The former are the well-known specifications needs to take on a more which makes it a candidate for masthead international classes of A, M, and 10-R positive tone. By this I mean that the fittings and chain plates. designations with the addition of the class secretary and his technical staff American 36/600 class. In all these cases, should endeavor to follow the lead of COMPOSITES: These are innumer­ general size, shape, and maximum the full-sized Etchells 22 class. This class able. I've seen 3-layer materials which, in allowable sail area are controlled by spells out precisely what is allowed on a 1/2 x 1/4 X 24-inch strip, will be stiffer either formulae (as in the A’s and 10-R’s) the boat, piece by piece. The philosophy than heavy fiberglass arrowshafts and or by maximum dimensions (as in the is "If it ain't in the specs you can’t have have 1/3 the weight. 36/600 and M classes) The only prohibi­ it." Some regulations in the EC/12 class TUNGSTEN: Has appeared in keel tion on materials is a general one in have this tone. The one which prescribes bulbs. This metal weighs 19.3 grams/cc which AMYA outlawed mercury and how many and which functions the vs. 11.4 g/cc for lead. This means the uranium. These were banned due to the radio may control is a good example. same weight bulb will only occupy 59% possibility of environmental or health Many have chafed at only 3 R/C func­ of the volume of the lead one. The bulb damage which might result from their tions, yet this allows 2-channel skippers will have a smaller frontal area and release to the environment. These two to be very competitive. I’m not aware of wetted surface, but will exert the same metals were the only ones mentioned. an ACCR being won yet by a third Continued on page 104

50 R/C MODEL BUILDER C U R T IS S 18-T-1 ...... 52 F R E E F L IG H T S C A L E ...... 56 c£EE-E±i£Hr HANNAN'S HANGAR ...... 58 PEANUT MARTIN-BAKER MB-5 . . . 59 AND C O N T R O L L I N E ...... 62 F R E E F L I G H T ...... 64 ^Ofi/TROL N IM AS R E C O R D T R I A L S ...... 68

Bill Noonan's Curtiss 18-T-1 afloat on a mirror-like water surface. This rubber powered model is featured in a construction article that appears on the following pages. A rare bird indeed!

NOVEMBER 1979 51 PHOTOS BY AUTHOR n o las yt Don' efoe huh i' fne l ng model. g in fly e fin a it's though, fooled be 't n o D yet! floats, on and y lL N A ... An bcr he-igrfom asgn b . by gone days m fro three-winger obscure n A . . . NAN O NO LL Bl By standing in The Big Hangar in the Sky. the in Curtiss Hangar Big Glenn The in of standing ghost the Imagine • hc qity ok hi paei aero­ in place their took quietly which but any of consequence, fame achieved 18-T-1 and interesting many Curtiss of the one of triplane, character the called the Curtiss-Kirkham “ Wasp” Wasp” “ Kirk- Charles by wasdesigned Triplane, Curtiss-Kirkham the called of inquiry probing through vealed ie n peoiu cat loig its through. elbowing way craft precocious and sive tion’s face becomes a faint the smile with appari­ theon the expression Suddenly, seems endless. procession the . . . series the all Jenny, his the bearing name; planes distinguished famous of parade speed of 163 mph. of speed 1918,in anplane” with unofficial "battle fastest world’s bethe to wasconsidered tois fame Its claim limited that itengine. re­ occasionally only history, never nautical hich w aircraft unorthodox view. from gone all Itdarts out and to inof plane. the charm and itswith fuselage brash give demeanor undeniable corpulent extravaganza of wings and wires coupled The youth. heralding the mistythe of heralding version an aggres­ aerial phantom a on out looking is He hog a eis f oiiain by modifications of series a through historians. are they Soon cavalcade. heavenly the callow for allowances making parent, noisy approach of an unmuffled engine, engine, anof noisyunmuffled approach P-40 the NC-4, the Falcons, the Hawks, ham in 1917 for his powerful K-12 K-12 powerful his for 1917 in ham 52 This little scenario serves to establish to serves scenario little This Curtiss’ smile is one of a tolerant tolerant a of one is smile Curtiss’ fe te a, h Mdl 8 went 18 Model the war, the After sometimes 18, Model Curtiss The WASP 3326. Ours is3326. good3325, cameold Ours which were types 18-T-1 the of Two Curtiss. to its ignominious end on a Detroit coal aDetroit on end itstoignominious ul fr aig nmee 32 and 3325 numbered racing, for built pitch block pitch blade blade pattern n RP DETAILS PROP Μ comes more apparent later on when when on later apparent more comes the thisfrom formers andcutting angles, 1/16 square balsa longer than slightly the Apply paper. along the wax cement edge of a of piece or hard Wrap Saran with filing notches to receive the stringers. the receive to notches filing 90degree at balsa sheet 1/32 of pieces may These fuselage. left sidesthe of and oh o ad otm opnns Do form and components. bottom view and side top both to "back­ Secure laminated abone.” up make similar to a to piece this Mate length. fuselage later. come they work­ your on place safe a in formers oe ii sok Te datg be­ advantage The stock. rigid more structural ork, two w laminating by had more be may benefits little a mind don't you if or, sheet, 1/16soft from be right the for formers cut to necessary o pec odwt pins. with wood pierce not time, this at notches stringer No bench. ih sal 0 ere qae s you as square degree 90 small a with in formers side left cement alterations, with snugly index should former each respective of bottom and their top at at Notches fit stations. for them check FUSELAGECONSTRUCTION career. trious you’ll like it! like you’ll pile in 1922, capping a less-than-illus- less-than-illus- a capping 1922, in pile place, checking for perpendicularity proceed. perpendicularity for checking place, necessary any making After backbones. ts n nern ltl bge. r it, Try bugger. little endearing an it’s admitto have will you designs, favorite planes may not be high on your list of of list your on high be not may planes eoe ntig le s oe i is it done, is else anything Before Protect the plans from surplus cement cement plans from surplus theProtect left and right cut accurately the Pile ae omr fr h lf sd and side left the for formers Take W hile three-winged hydro-aero- hydro-aero- three-winged hile W blade end prop kub-make kub-make two prop £* H h hub assembly / MDL BUILDER MODEL R/C !: + r t n fro side i _L Finished surfaces, uncovered and unassembled, showing the structural details. Fuselage and main float look like a fair bit of work, the rest is relatively simple. Only the top and middle wings do any lifting; the bottom wing has a symmetrical airfoil and just goes along for the ride.

When this assembly is thoroughly dry, and repeat the process at each stringer lightly scribe outline in appropriate remove it from plans and repeat the location, using former No. 3 marks as place, immediately in front of former 3. rocedure with the right-hand former primary reference. Follow this by filing Cut and remove stringers, backbone alves, carefully mating them to form 1/32-inch stringer slots, 1/16 inch deep. and filler pieces. Sand cockpit edge to the full former shapes. Check for any All stringers are medium hard balsa, achieve neat and symmetrical oval. distortion by sighting down fuselage 1/32x3/32. Confirm accuracy of notches Cut and rough-shape nose block from centerline. by occasionally inserting test stringers. medium balsa. Tack glue temporarily to The plans show stringer locations on Whenever you insert a left-side stringer, former 1. Carefully contour to conform former 3. These reference marks should counter its tension with a corresponding to fuselage shape, using progressively be transposed to the balsa former (both right-side stringer. When you finally finer sandpaper. Follow same procedure right and left halves) prior to cementing have all the little beggars in place and for fairing cone at tail. Cut nose block to backbone. have checked the fuselage forsymmetry, away from the former, and drill to accept Here’s the procedure we followed to apply cyanoacrylate glue to all stringer prop shaft thrust button. establish correct stringer notch loca­ notches. Fill in between stringers at tail where tions: Take any size flexible strip mater­ Trim excess length of stringers flush the two stabilizer halves cement to ial (3/32 square is OK) and lay it along with front and back (1 and 7) formers. Fill fuselage. Also fill in between stringers the fuselage side at stringer No. 7 between formers 1,2, and 3 and down to with hard 1/16 sheet to provide for 1/8- (counting from the top). Tape the strip the fourth stringer, with soft 1/16 sheet inch diameter aluminum rubber anchor lightly at the tail and nose. Mark refer­ balsa. Sand to fuselage contour. Cut tube. ence points on all formers. Loosen tape paper pattern of cockpit opening and FLOATS The center (main) float is constructed in the same manner as the fuselage. All stringers are 1/32x3/32 medium balsa with the exception of the chine (where side and bottom intersect) stringers, which are 1/16 square. The bottoms of all floats are covered with light 1/32 sheet balsa. Keep the chine edges as sharp as possible, as this is hydrody- namically important. Float struts are made of bamboo. The front struts are cemented to the back side of float former D. All four struts are made long enough to reach inside fuselage about 1/2 inch. These will be cemented to fuselage formers 2 and 3. Wherever struts pass through fuselage or floats they are surrounded with a 1/16 sheet balsa “ collar” to allow securing of tissue covering. Add .010 aluminum water rudder. The tip floats are simple boxes with pinched trailing sections. Lay down frames for four identical sides. Main components are 1/16 square balsa, diagonal braces 1/32x1/16. When as- Bill used a freewheeling device on the prop for longer flights. Some of the struts are made from cocktail straws. Monofilament "wires" add greatly to the model's strength. Continued on page 78

NOVEMBER 1979 53 bula ner point ____ _ interplane struts strinjers are V H ť balsa

index block

sohd balsa

lam inate a ll tips-e pcs - 5 /Ά basswood

54 R/C MODEL BUILDER

eagle on my stomach. Needless to say, all I could think of was, “ There goes my trip to Oshkosh.’’ At that time I had deter­ mined that luckily I had no broken bones, therefore no trip to the doctor was planned, in spite of all my aches and bruises. No way was I going to have him say that I would have to stay at home and rest! Murphy wasn’t going to ruin this trip! On the eve of our trip, Jack spent the night at my home so that our 4:00 a.m. starting time could be met by both of us Absolutely immaculate orange and yellow Travel Air 4000. Used to belong to famed aviation with little effort. We were to meet the writer Richard Bach, now sports name "Mary Morris" under cockpit rim. A real beauty. other fellows at 6:00 a.m. at Flabob Airport. That meant we had to leave Corona Airport by 5:30 a.m. As luck would have it, Corona was socked in, FREE FLIGHT SCALE and there was no way we could leave. We tried calling out to Flabob where a By FERNANDO RAMOS p h o t o s b y a u t h o r couple of the “ crew” were planning to spend the night, but no answer. We • This month I’m going to depart from this long haul. Jack and I practically did decided to drive over to see what was my usual format. On July 25, Jack Mc­ an annual inspection on the Charger, up. We arrived to find sunshine and no Cracken and I embarkedonanadventure checking everything imaginable to airplanes. They had left on schedule .. . that I would like to share with you. For assure that everything was in tip-top the bums! the past 10 years, it has been my desire to shape. Anytime you leave terra firma, it By 9:30 a.m. the weather had broken build and fly my own aircraft to Oshkosh, is wise to have everything going your enough that we could depart for Wis­ Wisconsin. After 5-1/2 years of construc­ way. As one of my Charger friends from consin. We reached Prescott, Arizona, tion, my dream has finally come to Atlanta says, “ I would rather preflight by noon, where we refueled and had fruition. my airplane a thousand times, than die lunch. The density altitude at takeoff For all of us interested in airplanes, once!’1 time was around 8,000 feet. We headed Oshkosh certainly needs no introduc­ We had planned to fly with three for Winslow, Arizona, climbing but not tion. It is often referred to as Mecca, and other airplanes, making a gaggle of too swiftly. We needed at least 9,500 feet rightfully so. It is a place where thou­ three biplanes and a Cessna Skylane. The to get over the next range of mountains, sands of aircraft and people gather to anticipation of this trip was nearly more and 8,500 feet was all I was able to get. see and talk airplanes, but I’m getting than I could handle. Add to this the fact We decided to turn back to a nearby ahead of my story. It really starts a couple that I had ridden a ladder two stories airport and spend the night. We landed of weeks prior to our actual departure, down while house painting, landing in Cottonwood, Arizona, both of us the with the preparation of my biplane for hard on the pavement below, spread- picture of dejection. Seems as though not too many things were going well. Murphy was smiling! At dinner we discussed and analyzed the problem. The propeller I have is not fixed-pitch, nor is it a constant speed (one that can be adjusted from the cockpit to vary the pitch); it is called an “ Aeromatic.” It changes pitch auto­ matically by the use of weights and the throttle settings. The problem is that the amount of weights were adjusted for flying at near sea level condition, and here we were flying from airports 5,000 feet above sea level, plus the very hot temperatures raises that several more thousand feet. Early the next morning we made a change in the weights, and were off again. We left Cottonwood with our destination for the second day being Liberal, Kansas. Very nicely restored Waco Cabin showed up at Oshkosh. Color is red and black. These ships We arrived at Liberal about 8 p.m., just are bigger than most modelers realize. a bit before the sun set over the horizon.

Piper Aircraft’s first low-wing retractable gear airplane, the one and only prototype ever Cockpit details of Piper shown at right. Tan­ built. A very interesting plane, would make a good model. Blue fuse, yellow wings and stab. dem seating, lots of window area.

56 R/C MODEL BUILDER One of our columnist's favorite aircraft at Oshkosh was this Puss Moth. It's not as big as you might think. Coloring is blue fuselage, orange wing and stab. Can you imagine how much one of these ships is worth today? Liberal is a common stopover place for again topped off the tanks and prepared many pilots going east or west, and we for the 15-minute flight to Whitman met several pilots enroute to Oshkosh. Field in Oshkosh. We arrived in the After securing the Charger for the night, prescribed holding pattern a bit late, we inquired about a room for the and I heard over the radio that the field evening and transportation into town. would be closed due to an airshow and The airport operator arranged for both, that it would not reopen for about 3 and soon we too were secured for the hours. We returned to Fond du Lac and evening. enjoyed watching about a hundred or On the third day, we arrived at the more varied aircraft land that were also airport early and changed the weight on too late for Oshkosh. Jack and I decided the prop for sea level conditions. We that it would be better to take off a bit had hoped to be in Oshkosh by evening. earlier than to get in line with all of the Our stops were planned at about two other aircraft waiting to leave Fond du hour intervals. This is more than enough Lac near the opening time of Whitman time in the cockpit, and it gave us an Field. We did and for about a half hour opportunity to get the kinks out for the flew lazy patterns over the beautiful next two-hour leg. Up to this point, the Wisconsin countryside. There were no weather had been just fine, with only other airplanes around to be seen. This one thunderstorm encountered north meant we could be first in line, which of us beyond Albuquerque. However, would uncomplicate the landing a bit. while flying north over the Mississippi When the radio said the airport was River, we ran into a rain squall which again open I headed for the prescribed forced us back to the town of Hannibal, area as spelled out by the EAA. I was Puss Moth cockpit details. Note the unusual in Missouri. It was evident that we would Continued on page 98 turn and slip indicator. have to stay the rest of the day and night there, as all indications were that the weather was not going to improve. As it turned out. Hannibal wasn’t too bad a place to get stranded, since this was the home of Mark Twain. One of the pilots out of Hannibal graciously gave us a ride into town (about 8 miles), and showed us some of the spots we should take in and where we should eat. He then took us to a motel which was within walking distance from all of these sights. The following day we had a two-hour delay in Burlington, Iowa, where the clouds were again right on the deck over the Mississippi. We finally got off and A big Howard, NC52928, in red and white trim, for the benefit of Flyline kit builders. These made our next fuel stop in Rockford, aircraft are not an uncommon sight at airports around the country. Illinois. Rather than land at the large municipal airport, we chose a 2000-foot grass strip. This was the first time I had ever landed on grass. What a thrill! After refueling, I asked the owner of the field if there was any place nearby where we could eat. He said that down the road were several places to choose from, and that he would get us some keys to a car. It turned out that the keys belonged to a brand new Oldsmobile. No questions asked. We found this to be a rather common occurrence in the Midwest. The people there were so very friendly and trusting. I’m afraid you wouldn’t see this happen too often in California. At any rate, we continued northward A real nice Tiger Moth. Color is yellow overall. Note original DeHavilland insignia on hub cap. to Fond du Lac, Wisconsin, where we

NOVEMBER 1979 57 been produced in a bewildering variety of sizes, ranging from tiny model engines through massive powerplants that al­ most boggle the mind to contemplate. And while the advantages of these engines are stressed, the disadvantages such as their unfortunate smelling fumes are not ignored. Like other forms of energy converters, diesels are now facing renewed scrutiny, since some of their previous disadvantages have been nearly eroded away by what may appear to be political and economic problems. Many photographs and drawings are featured which provide a graphic proof of the variety of diesel engines which have evolved over the years. Among these are the aircraft units, such as employed in the Junkers flying boats and others. No reservations? Only one, which may perhaps class me as an old stick-in- the-mud: all of the engine specifications "Erratic failures are loathed by engineers; it is much easier to fix a are presented in the International Sys­ dependable flaw." tem of Units. And while I am well aware • We think most model builders would sufficiently understood in relation to of the logic behind trying to convert the agree with that opinion, taken from the their effect on inventors and inventions, United States to this system, old com­ book Diesel. The Man and the Engine, but they are absolutely crucial. The very fortable habits are hard to shed. Even authored by Dr. Morton Grosser. The existence of diesel engines represents a though conversion "shortcuts” and story of Diesel the man is a fascinating triumph of patience and persistence tables are furnished, I found myself account of struggle against mechnical, over adversity. inhibited at encountering, for example, financial, and even romantic odds, Apart from the personalities directly power ratings expressed in kilowatts worthy of a Hollywood epic. In a most and indirectly involved in the design, rather than horsepower. "Decoding’' readable fashion. Grosser weaves his development and marketing of the this information interferes with ease of thoroughly researched history against a engines, the book is also devoted to a communication, at least for me. Doubt­ background of the social environment survey of the machines themselves, and less future generations will have an prevailing during the developmental the various applications to which they easier acceptance of it, but for us “ old years. Outside influences are seldom have been turned. Diesel engines have Continued on page 94

Randy Wrisley getsa good launch on his Jumbo Rubber XP-51. Cute semi-scale FA-61 Peanut by Richard Howard, based on Skip Spans 54 inches, weighs 16oz. with rubber. Ruff's R/C plan in MB. Pilot by Paul Steele.

Sherman Gillespie’s original Gadfly, built in 1954 and published in Ernie Wrisley's rubber-powered Andreason bipe. Can't vouch for the M.A.N., is still f lyable. Peanut version won 79 P.P.P.P. Contest. chick in the cockpit, but the registration numbers are authentic!

58 R/C MODEL BUILDER

If you want to try FAI but only have AMA size models, try lashing Mike Hoffelt holds while Frank Tomicich lights the fire in the Fox a .15 on with an aluminum adaptor. Works great! in his AMA Monoboom. How come the ground is so bent? and will be the same for our 1980 season pit crew with no damage to the airplane. the event, but I feel this minor compli­ of racing. Then this year on my second pit, in the cation is more than justified by the One change that we are considering is final, my airplane ran out of fuel just increased safety and reduction of dam­ allowing the use of fuel shutoffs, which after going crosswind, and I was unable aged airplanes. Vic Garner. are presently not allowed. A couple of to get it down before 3/4 of a lap. My pit­ I’ll have to agree with Vic that al­ reasons for that. Vic Garner and myself. I man restarted it and let go, headed into though the installation of a shutoff is a wanted to allow them when the original the wind. Naturally, it came in, dusted complication, the benefits to its use rules were drawn up, but the majority the prop and shut off the engine, also outweigh this consideration of compli­ decided otherwise, which, considering damaging the prop tips. As a result, I cation. Besides the safety aspect, which the popularity of the event, certainly finished 8-10 seconds behind M ike can’t be argued with even by those in couldn’t be referred to as a mistake. Still, Hazel (or second place. favor of keeping shutoffs out of events I would like to see . . . wait, let's hear like N.W.S.R., the ability to go out and As you know, I have a shutoff on my from Garner on the subject, as put forth get that super needle setting in less time airplane so that I can get needle valve in a letter to John Thompson and Mike than it would take to run out just one settings in short order. After I get the Hazel, Editor and Publisher of the tank of fuel has to be considered. With needle set I remove the shutoff and no newsletter Flying Lines. this in mind, the novice would be trace of it can be found 10 seconds later. helped considerably, as they are gener­ John and Mike, Sure enough, this adds a complication to I decided to respond to your Drizzle ally the ones who have trouble getting Circuit questionnaire even though I the needle just right, yet many don’t feel only fly the event (Northwest Sport like taking a lot of test flights for fear of Race) once a year. As such, my reply holding up the experts who also want to probably shouldn’t be counted in any test. tabulation you might make for popular­ Although Vic didn’t mention it, an­ ity of the event and/or proposed other advantage is being able to shut the changes. thing down if the motor is making funny However, here goes.. . noises. Granted, we aren’t talking about First of all, I do like shutoffs, and saving an expensive racing engine, but anyone can make a simple shutoff that even a Stocker represents some invest­ will work every time. Heck, I'll even ment, and to have to listen to a motor build the shutoff for people who can't literally die a slow death, all because use do it themselves. It might take 70 or 15 of a shutoff is not allowed, seems to be a minutes of my time per shutoff for waste. N.W.S.R. ONE PERSON’S OPINION OF AN I am sure the use of shutoffs would “EXPERT” IN MODELING permit safer races, due to being able to The above is the heading to a piece stop the engine when lines get crossed, done by Morrie Leventhal and appear­ etc. Take a pit stop and not lose an ing in the Control Line Flyer. And airplane. For my personal situation I following is that piece. . . cannot run more than 15% nitro in my First of all, there is no such thing as an fuel system anyway, so I won't be able to expert. If a person is willing to get go any faster. However, a shutoff would involved enough in his or her hobby to have prevented the problems that oc­ spend time testing, trying, failing, trying curred to me both in '78 and this year at again, asking questions, making phone the N. W. Regionals. In '78 I had run out calls to other modelers, then testing and of fuel after just passing this very slow- trying again, he becomes very good at flying airplane. I had to hold it up till he the hobby. He puts in the time, pays the got out from under me so I could land. dues and eventually wins ... then the whole world says he is an expert. My airplane got hit in mid-air. Had I What (he whole world does not know been able to pick my shutoff time I One of the reasons Texas Combat fliers don't is how long and how hard he worked at would have come down a few laps lose many arguments. Ernie stands on oppo­ earlier, behind the slowpoke and to my nent's plane to determine its lift capabilities. Continued on page 95

NOVEMBER 1979 63 Guntis Sietins placed 1st in F1A class in international postal meet Ted Stalick scored 4 maxes to win BCD Gas event at Hawks Spring last fall, sponsored by model club in Sao Paulo, Brazil. Opener, using a Spacer. Dad Bob applies starter.

by TOM HUTCHINSON r PHOTOS BY AUTHOR WHO’S AFRAID OF THE I’m baffled as to why so much effort is winner’s circle. Did you ever think about BIC BAD SCHNEURLE? being put into rehashing old designs to that? Time on the clock still depends (By Ralph Prey, w riting in the San use NEW engines, and the end product upon the basic principles of power-to- Valeers’ Satellite) is invariably an inconsistent power weight ratio and glide sink rate, plus “ Have you noticed recently that there pattern, ending up in a screaming other goodies such as altitude. But you are fewer and fewer entries in the AMA kamikaze crash dive. Is this progresss? can design a winning model, I’m sure, Gas classes? And more and more in the “ If I were a newcomer to free flight that incorporates these basic principles rubber classes? And have you seen any and went to Taft for the first time and without a Schneurle. But again, why isn’t really new AMA Gas designs that were saw these modified designs of the late it being done? Could it be that the developed strictly for the Schneurle '50s being overpowered with an engine Schneurle has SPOOKED a lot of poten­ engine? It’s the same ole Satellite design of the late 70s, I’d shake my head trying tially good designs from becoming a of 20 years ago that is being built with to figure out the logic of that approach. reality? And why not build a model smaller tails and auto rudder/stab to Certainly the rules are not that restric­ without a Schneurle? That’s a good handle the power. I’m not saying that tive as to limit originality, like in FAI question, I’d like to hear your answers.” the Satellite design isn’t good (it’s Power where they all look alike. I’m Ralph’s point about not needing a winning most contests), but it is an old sure, too, that I’d think twice before I’d Schneurle to be competitive is one that design that is being reworked. invest a “ C ” note in an engine and hours I've stated previously in the past. In free “ Where is the imagination and origi­ and hours of my time to build something flight, you're only judged on time in the nality among today’s free flighters to that the odds . . . were unbelievably air, not cost or power of the engine. If come up with an entirely new design just against its survival. Maybe that’s why we you design the model to suit the power for the Schneurle? There are many good aren't seeing many newcomers in the available, you should be competitive. ones out there who are capable of AMA Gas classes. The problem seems to be one of most designing an entirely NEW design, and “ Or look at it this way . . . maybe you people having more power than they not just rework a Satellite or a Duster. don’t need a Schneurle to be in the can handle, not the type of engine porting being used. There are a couple of ways to tame the beast. Easiest way is to use a milder fuel until you get the feel of the model, then gradually “ tip the can” until you reach your trimming limit (the nitro shortage may make this neces­ sary anyway). Next step would be to build bigger models. More wing area will slow down the climb and improve the glide, even if the overall weight is increased. Try about 650-750 sq. in. for a 3.5cc (Joe Foster uses 650 squares on his Buck), and maybe about 1000sq. in. fora .40. This may cause problems if you have a small car, so you might have to con­ sider other alternatives. I don’t agree with Ralph that it’s necessary to come up with a completely new design just for the Schneurles. Such Larry Delaney used up 2 year's balsa rations building this "Gool." Hump on top of wing houses designs already exist; you just have to spoiler DT mechanism. Spoilers can be seen in half-up position. look for them! Look for them in areas

64 R/C MODEL BUILDER outside Southern California, however. In other parts of the country, gas fliers have had to cope with short engine runs and maxes and have concentrated on designing and trimming for climb. Look also across the ocean, where British fliers have been trimming their Open power models for maximum climbs (400 sq. in. on a .29, for example) for years. It is possible to handle a lot of power without auto-surfaces (although don't overlook them as trimming devices, if needed), but the model might not look like a Satellite. I’ve found that a reason­ ably tall pylon, enough dihedral, and sufficient rudder area, combined with wash-in on the right wing, will give a fast, safe right/right pattern. Many of the ships that have inconsistent power patterns are being flown right/left and are marginal on rudder area. Noted British power flier George French once commented in print that as power increased, fin area had to be increased, comments? and I’ve found this to be true. Mel THE WINNING TEAM Schmidt also found this out when devel­ Most free flighters remember who oping his SHOCer design. If you're won an individual event at previous interested in developing a model that World Champs, but not too many pay can handle a lot of power, you might attention to the team winners. That’s begin by taking a look at Mel’s designs unfortunate, since success in the team (SHOCer and Maxhog) for ideas. My events is a much better indication of a "Flying Burrito Brother” and "Zingo” nation's prowess in an event than the designs are very similar to Mel’s, and will nationality of the individual winners. handle power very well. (A lightweight Becoming a World Champion depends Zingo will handle a K&B .21 Schneurle a lot more upon the vagaries of Lady on 450 sq. in., if you’re interested.) Luck than does winning the team cham­ Anybody out there have some pionship. Individual titles are won by one flyoff flight, which is not often a true indication of a model’s potential. Such factors as a tree on the horizon, position at the starting line, a broken strand of rubber, or a capricious thermal all have more effect on who is world champion than the model or the flier. A lot of well- respected, expert fliers have never won a World Championship outdoors: Ver- bitski, Lepp, Bob White, Joe Bilgri, Max Hacklinger, Peter Allnutt, Doug Gal- breath, and Henry Spence, for example, Avery Clark flew this fast-climbing Zingo with have come close to winning, but have K&B .21 at Hawks Spring Opener. never managed to grab the brass ring. The team championship, on the other chances are ruined, even though one hand, is based on 21 flights made all man on the team may do well. The during the day by 3 fliers. It is less subject Eastern bloc countries have realized this to the whims of Dame Fortune. It is for many years, and have concentrated possible to plan and train for the team on winning the team championship with championship, since a hard-working remarkable success. And they have suc­ team of consistent fliers and models has ceeded in producing individual winners a much better chance than a bunch of at the same time. brilliant individualists. The lowest plac­ I compiled table 1 while researching ing team member is the most important last month’s piece about the home field man on the team. If he gives up at an advantage. It shows the countries which early point in the contest, his team’s have won the team championships since Marian Joyce watts patiently to launch hubby Doug's A/2 canard. DARNED GOOD AIRFOIL

WORTMAN FX60-126, THINNED TO 10% —

STATION 0 2.7 5.2 10.3 14.6 19.6 25 30.9 40.2 50 59.8 69.1 80.4 89.6 100

UPPER 0 2.9 4.1 5.6 6.4 7.1 7.6 7.8 7.8 7.4 6.6 5.5 3.7 2.1 0

LOWER 0 -1.2 -1.7 -2.2 -2.5 -2.5 -2.4 -2.1 -1.4 -0.4 0.5 1.1 1.4 1.1 0

NOVEMBER 1979 65 OUTDOOR HLG UN - UN POLLY FINISHED WT: 24 - 30 GRAMS V - DIHEDRAL 2-5/8 EACH TIP I I

σ> R/C MODEL BUILDER 1953. Table 2 counts the number of team victories by event. Some interesting facts come out of all these statistics. Italy is the only country to win team championships in all 3 events. The Italians have also won the power championship more than any other country, while the Russians have dominated the A/2 event even more thoroughly. The host country has won a team victory only 3 times in the past 10 years. The North Koreans have won 3 out of the last 6 team championships. Meanwhile, the U.S. hasn't won a team championship since 1965. We’ve placed 2nd once and 3rd three times since then, but the most recent good team placing was in 1971, when the Nordic team finished 3rd. Maybe some home cooking will improve our team placings this year! THIS MONTH’S THREE-VIEW: THE UN-POLLY HLC With all this talk of VIT, laminar flow, circle tow, Schneurle porting, thermis­ Gene Bartel turns loose his Witch Hawk 1/2A. tors, etc., how about a break for some­ Gene was overall champ at Hawks meet. Fiesta of 5 Flags meet in Pensacola, FL. thing simple? Like a simple hand-launch glider, as in this month's 3-view. Not much to it: V-dihedral wing, no DT or TABLE 1 fancy finish, and you can get 2 wings, 2 WINNING TEAMS AT FAI FREE FLIGHT WORLD CHAMPS, 1953-77 fuselages, and 6 stabs from a 36-inch YEAR A/2 WAKEFIELD FAI POWER length of balsa. Looks like you could 1953 USA USA build it in less time than it takes to put in 1954 West Germany USA* USA* a DT on a regular HLG! And that’s the 1955 Italy Sweden England idea, to have a simple, expendable HLG 1956 Czechoslovakia Sweden* England that I could make fly. 1957 USSR — — This last part was critical, since I've had 1958 — Hungary Hungary trouble in the past in building H.L. 1959 Finland USA — gliders that were straight and well- 1960 — — Hungary aligned. It looked like my chances of 1961 Netherlands Poland Hungary getting a straight glider would be en­ 1963 USSR Italy Italy hanced by using V-dihedral in the wings, 1965 England Sweden Italy/USA since I’d have 1/3 the joints to make. 1967 Czechoslovakia* USSR England Most of my indoor gliders have had 1969 USSR USSR Italy V-dihedral, and nearly all had flown 1971 Austria Denmark Sweden* well. The few outdoor V-dihedral gliders 1973 Austria* East Germany France I’d built had usually been quickly lost,so 1975 USSR North Korea Austria Continued on page 103 1977 North Korea North Korea Italy ‘ Denotes host country

TABLE 2. TOTAL NUMBER OF TEAM VICTORIES, BY EVENT AND COUNTRY (F/F WORLD CHAMPS) COUNTRY A/2 WAKE POWER TOTAL Italy 1 1 4 6 USA 0 3 3 6 USSR 4 2 0 6 England 1 0 3 4 Hungary 0 1 3 4 Sweden 0 3 1 4 Austria 2 0 1 3 North Korea 1 2 0 3 Czechoslovakia 2 0 0 2

Mark Valerius and C.C. Johnson came up with this new design to handle power of new Mark Valerius turns loose his Class D ship at Schneurle engines (see Ralph Prey's comments in text). Resembles current FAI trends. Pensacola meet. Hot climb!

NOVEMBER 1979 67 PHOTOS BY AUTHOR

Flying site was again the Atrium of the Northwest Institute. Windows Stan Chilton, master craftsman, deciding which one he’s going to around perimeter are classrooms and dormitories. fly next. Sure has a lot of models in that box!

1979 INTERNATIONAL INDOOR RECORD TRIALS By JOSE TELLEZ . . . Once a year, the best indoor fliers in the country get together at Westbaden, Indiana, for the sole purpose of setting new records. No less than 13 were set at this year's meet! • For those of you who missed the 1977 to set the standards for the year. or 1978 reports published by MB, I will Whereas in 1977 and 1978, when we repeat that the Westbaden meet is held reported that large numbers of models yearly at the Northwood Institute’s had perished to the ceiling obstacles, Atrium. This beautiful and historic this year saw very few models suffer this building provides close to 95 feet of fate. Our thanks for this welcome change ceiling, thus qualifying it for Category II go to Roy White, who risked his neck (under 100 feet). ceiling walking 95 feet overhead (we The short-form impression of the hope his insurance agent is not an R/C meet was well characterized by Contest MB reader) to shroud the main obstacle Director, organizer, record keeper, (a suspended platform) with a plastic timer, and friend of everybody. Dr. John fence. Ron’s courageous act won him Martin, at the start of the meet. Looking the double case suds prize during the over the entrant's list he said, “ I see Jim awards ceremony. Richmond is going to be here, this is If you ever had an inclination to learn going to be like batting practice for Babe about indoor, you could do no better Ruth." than to attend one of these meets where For those of you who don’t follow you can listen to, ask questions from, indoor closely, Jim Richmond recently and observe in action the best indoor beat out all competitors in World Com­ fliers on this planet. An example of what petition held in England to become the you may expect is a synopsis of the first World Champion, and as you will see in day’s action. During this opening day we our report later, this title is well de­ saw Dave Lindley and Mike Van Corder W t m U B B Ě m served. Like Jim, the other registered (two sharp young Junior fliers) establish Dave Unstrum neglecting his duty as report­ fliers were true top-of-the-line indoor new national records; Dave for R.O.G. er and playing with his helicopter, an Obarski modelers, and they were at Westbaden and Mike for Novice Pennyplane. Mike design that set a record last year.

Stan Chilton carefully observes torque meter and turns counter as he On the way down from establishing a new record, Don Lindley's packs them in. Motor will be transferred to EZB on stand. "Agitator" autogyro. Would fly even if rotor came off in flight.

68 R/C MODEL BUILDER Ballet sequence by Stan Stoy. Swan Lake launch was good for 75 seconds. Stan flew his amazing "Folder" folding-wing HLG. Set new Cat. II record at 2:32.4.

ment shine even brighter. I have just given you the highlights of the opening day in terms of the results; what really makes Westbaden is know­ ing that the fliers you are questioning and observing are of the caliber to obtain those results we have described. Look at the way they pack their models, the way they assemble, wind or adjust; observe the way they measure and record torque, turns, rubber size prior to each flight, and then take careful records of performance. Look at the jigs, tools and tricks they use to do the job in record fashion; this is an experience well worth a trip to Westbaden. Ron Ganser was mostly trimming out his ships and getting ready for FA I eliminations. I had the opportunity, for instance, to talk to Stan Stoy, a young man with a well also set a new mark for Junior AMA earned reputation in the H.L.G. field. Paper Stick at 16:01, which gave him the Not only did my respect for this fine high point award for the overall meet. engineer become well established, but I This same opening session saw Bucky had a most valuable education and Servaites improve the existing FAI mark pleasant time learning how he has set by Jim Richmond in 1977, leaving the solved what I (and I am sure very many of new number to beat at 33 minutes and 24 you) have dreamed about for years and seconds. (This new mark was to be gave up because it was too complex. I topped later in the meet.) am talking about folding wings. To close the session late in the eve­ Start's gliders have a six-panel wing. ning, Mr. Jim Richmond showed us his For the launch, the two outer or tip championship class by putting up the big panels are folded down under the H.L. Stick for (would you believe) 44:42! central panels, then in turn these central Only four times in history has anyone panels fold under the inboard section anywhere under any ceiling height with panels. This folding process leaves the any kind of a model ever exceeded 40 glider at launch with a very short wing minutes. Westbaden is a Category II having an approximately symmetrical Jim Miller of Cincinnati displays a Curry Wot building, which makes the accomplish­ section. This configuration allows the bipe built from an Andrew Morehouse kit.

Current World Champion, Jim Richmond, shows off his "Cat Walker" Bucky Servaites' model climbing out. Note the prop flexing under which set FAI Stick mark at 37:52. the strain of the initial power burst.

NOVEMBER 1979 69 Stan Chilton, top EZB man, launching for a record. Stan made a Master indoor craftsman Ron Ganser transferring a wound motor brilliant comeback when his model was disqualified... see text. to his model. Winder counts turns, stooge measures torque.

mechanism is designed such that the action is rapid and positive and adjusted such that the wings pop out at the very top of the climb, producing an excellent transition. Since Stan does not need to compromise the size of the wing to obtain a good launch, he has a nice big wing which lets his models float grace­ fully down after the arrow-like climb. Having witnessed this performance, it is easy to forecast that future H.L.G. fliers will have to abide by Stan's new "tech­ nology” if they expect to becompetitive. Furthermore, I can forecast that in the not-too-distant future we will see F/F Jeff Everson, an enthusiastic Junior flier from power (particularly FAI) use some of Dave Linstrum instructs Roger Wathen Jr. and Miami. Had good times in Pennyplane. these concepts to take a quantum jump Sr., spectators at the meet, how to build an in performance. indoor. They were a success! model to be thrown to top height much From a spectator’s viewpoint, it is like easier than the usual big-wing glider. At watching ballet to see Stan or his brother, spectators during recovery operations. launch it behaves more like an arrow Mike, pick a spot on the floor, concen­ Autogyros seem to be attracting the than an airplane. A lever which Stan calls trate, break into a short run and toss a fancy and competitive spirit of the the "Q trigger” holds the wings folded climbing arrow which explodes at the indoor builders. We saw two which during launch, and this lever is held flat ceiling and is converted into a graceful deserve a report; the first, of course, the and forward against the fuselage by floater which circles down within a winner and record setter, designed and means of a small aerodynamic surface. consistent seventy-five seconds or more. built by Don Lindley from Naperville, As the glider slows down at the top of Incidentally, it is fortunate that Stan is a Illinois. Don shattered an old 1966 mark the launch, the aerodynamic forces surefooted rock climber, since he man­ with his "Agitator,” leaving 7:15 on the diminish and a rubber band rotates the aged to land his Folder a couple of times books. The second autogyro of interest lever backwards against the fuselage, on high and narrow ledges, thus putting was the double rotor machine built by allowing the wings to snap open. The on some exciting side shows for the Ron Ganser from Pittsburgh. Ron had

Bucky Servaites shows how to patch microfilm. Film is stored be­ High Point winners at Westbaden '79, I to r: Dr. John Martin, C.D.; tween two pieces of newspaper; cut a piece for patch, peel off one Stan Stoy, HLG; Jim Richmond, F1D; Don Lindley, Autogyro; side of newspaper, place on model, peel off second side of news­ Mike Van Gorder, Paper Stick; Mike Clem, Pennyplane; Richard paper very carefully with tweezers. Obarski, EZB; Walt Van Gorder, Novice Pennyplane.

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tried this arrangement before and had when the model was processed for were battling for the lead in this cate­ trouble with the rotors spinning at record purposes, it did not pass the gory; Mike Clem set the pace by break­ different speeds, causing the ship to inspection. Chord was over by a few ing the existing record established in capsize. This time Ron had coupled the thousandths of an inch! You can well 1977 by Marnie Meuser (daughter of F/F rotors by means of pulleys and a drive imagine the disappointment after a full expert. Bob Meuser). Mike's feat lived belt (thread). To maintain proper belt year of preparation. We felt very sorry as only a short while under the pressure of tension, there were pulleys mounted on we watched him pack up and disappear. Mike Van Gorder. who left future Juniors adjustable arms which were hinged by But hang on, the story has not ended. a challenge of 10:44. In the meantime, tissue tubes. The workmanship of this Taking advantage of the situation, Walt Van Gorder (Mike’s father) was fragile craft was so good we were sorry another of our EZB pros, Richard Obar- contributing to the decoration of the Ron was not a winner also. ski, from Pittsburgh, sent his ship up for a family’s mantlepiece by establishing a Friday's flying let us witness the battle respectable 18:52 and passed all the Novice Pennyplane time of 12:49. of the EZB category. Although these processing rigors. Having established a California was represented by Cezar models are not recognized in the cur­ top mark, Obarski received that evening Banks, who topped the open Penny- rent AMA or FAI books for records, a well-deserved trophy at the awards plane mark of 13:55 with his extremely there is a large following and unofficial banquet. However, flying was to con­ successful design, which is claimed to be scores are known around the World. A tinue for another day beyond the awards infallible! To prove this point, Dave real specialist in this class is Stan Chilton, banquet, and little did we realize that Linstrum, our good friend and F/F editor who uses scientific methods to build and when Stan Chilton packed up, he left for M.A.N., took two enthusiastic but fly, as reported previously by MB (Sep­ only as far as his hotel room, where he totally inexperienced spectators, Roger tember 1977). Shortly after the start of carefully peeled back the paper cover­ Wathen and Roger Jr. from Indianapolis, the session, Stan went up for a flight ing of the trailing edge of his wing, and guided them into building a pair of exceeding 21 minutes, good for a na­ chopped precisely 1/64 of an inch off Cezar's design. By Saturday, these total tional top time. Unfortunately at this from each wing rib, and reattached the novices were sending their models to time, science failed for Stan. When the covering to the trailing edge. On Satur­ the ceiling with times of four minutes model was initially built, it was accurate­ day, to show us that science, dedication with a tissue ship and six minutes with ly sized to employ the maximum dimen­ and perserverance pay off, Stan clocked the lighter Microlite covered model. sions allowed by the rules, and we have in at 20:24.5. This time, I hear, is not only We give first an A for the instructor, no doubt, knowing how Stan works, that a national record but also tops the British followed by A ’s for each student. this was done with all the precision and high time by about 20 seconds. Thumbs Also on Saturday, we witnessed the accuracy known to mankind. We all up, Stan. Stan commented that he was consistent performance of which our know that heat rises,and all the hot air in preparing material for publication on World Champ, Jim Richmond, iscapable. Indiana seems to concentrate at the this fine model, and we look forward to Jim had pulled an unfinished ship from apex of the Westbaden dome. Having its appearance. his model box and proceeded to give us spent a good part of twenty minutes in Another very popular category of the pleasure and privilege of watching this hot, humid sauna, Stan’s EZB suffered indoor models is the Pennyplane (these an expert work with sure hands, using a minor transformation. The fragile wing ships, as their name implies, are to weigh only makeshift jigs (bottles, pencils, ribs flattened out ever so slightly, so that at least one penny). The Junior fliers rocks, and fingers) to build in dihedral, NOVEMBER 1979 71 COMPLETE KITS WITH PRECISION CUT PARTS ALL HARDWARE FULL-SIZE PLANS

*··#··*

"RIDGE RAT" - $39.95 "PARAGON" - $69.95 49" span Slope Sailplane PIERCE 118" span Thermal Soarer Area - 436 sq. in., Wt. * 32 oz. Area - 1080 sq. in., Wt. - 48 oz. Wing Loading - 10.6 oz/sq. ft. AERO CO. Wing Loading - 6.3 oz/sq. ft. 9626 Jellico Avenue, Northridge, California 91325 Phone (213) 349-4758

wing posts, brace, and assemble a "Cat tute’s School of Hotel and Restaurant Any questions and comments are Walker.” The completed ship flew on Management, and if you choose, you welcome either through R/C MB or at Saturday to a new record of 37:52, can be housed in one of the rooms P.O. Box 733, Laguna Beach, CA 92652. topping Bucky Servaites’ time earlier in which surround the flight dome. I heard RECORD STATISTICS the meet. a contestant comment, "Where else can Mike Van Corder The only disappointment of the meet you wake up at 6 a.m., look out the Jr. Novice PP...... 10:44.7 was the small participation in Scale and window from your bunk, and see an Jr. AMA Paper Stick ...... 16:01 Peanut, especially when the flying site is indoor cabin fly by!” Jim Richmond so well suited to the event. Doc Martin Reflecting back on the meet, I would Open AMA Stick...... 44:43 committed himself to a big drive for a choose the participants as the highlight FAI Stick...... 37:52 super Scale event next year. The date is of the event, and you should plan to take Mike Clem now fixed and the building reserved for advantage next June of the opportunity Jr. Novice P P ...... 10:40.5 the last week in June (June 26 through to meet with this outstanding group. If Walt Van Corder 29), so hear this, all you scale types, and you forced me to pick the outstanding Open Novice PP ...... 12:49.8 start building. Remember that you will model from the meet, my choice would Don Lindley be able to mix with the best of indoor be Stan Stoy’s "Folder,” which repre­ Open Autogyro...... 7:15.0 modelers, you will be very economically sents a quantum jump in indoor H.L.G. Stan Stoy fed right on site by Northwood Insti­ technology. Open HL Glider...... 2:32.4 ********************** *** **1IX * I * I * > Cezar Banks Open PP...... 13:55.2 ♦ Open Novice PP ...... 11:45.7 4 Stan Chilton ♦ Open E Z B ...... 20:24.5 A V fa s y — PROPELLORS ♦ Bucky Servaites ♦ 23018 3 NOAMAHOiE AWE TOPRAMX CA 30502 PHONt 213-530-2313 FAI Stick...... *33:34 ♦ Richard Obarski ♦ Open EZB ...... **18:52 * ♦ ‘ Topped by Richmond * ♦ **Topped by Chilton * CUSTOMIZED * • * * * ♦ R/C Auto .... Continued from page 26 * 4 * * 3 and 4 BLADED ♦ good controllability in the sweepers and * Size 18“ .- 20" and 22" Dia. in 6” ,-8" and 10" pitch ♦ good top end. Pieter Bervoets, of the * These props are made to fit inside our 6" Dia. ♦ Netherlands, looked good and got a * spinner. ♦ good time, but teammate Ronnie Ton * Price $ 40.00 each. (Spinner not included) ♦ appeared to be really throwing his car * * around, with the differential losing time * Size 24".- 26" and 28" Dia. in 6",- 8" and 10" pitch ♦ and getting into trouble. The Italians * These props are made to fit our634" Dia. spinner. ♦ seemed to be driving their cars with * , S 48.00 each. (Spinner not included) ♦ differentials the same way (wild). Even * ♦ though the British cars had differentials, * ♦ they didn’t seem to be unloading as * ♦ much in the corners and appeared a * ♦ little smoother than cars from Italy or the * * Netherlands. When the first round * Individual 1 & 9 * results were posted it was: * Blades * 1) N. Ishihara (J) ...... 7:26.xx * * 2) Jeff Rold (U SA )...... 7:40.35 * Replaceable ♦ 3) Pieter Bervoets (N L)...... 7:40.44 * ♦ Ishihara had surprised everyone and * t Price ♦ was top qualifier of the round by 14 * i Extra blades - S 6.00 to S 10.00 each. ♦ seconds, or about 2/3 of a lap in 20 laps. * ♦ One thing that really helped him was no * * PAT. PEND. ♦ pit stop. The small carb allowed him to + ★ -*■ *·** ★ go about 9 minutes on a tank of fuel, but

72 R/C MODEL BUILDER BUD NOSEN MODELS > INCORPORATED BOX 105, TWO HARBORS, MINNESOTA 55616 All kits feature all wood construction, fast assembly, huge rolled plans, assem­ bly instructions, machine and die cut parts, all necessary hardware and much, much more. Designed for .60 engines on up. Write for our illustrated catalog— 50φ. 9’ PIPER J-3 CUB 9’ CHAMPION CITABRIA Standoff Scale Formed ABS cowl Kit - $119.95

3 or 4 Channels Flys like a trainer Kit - $99.95

1/4 size Standoff scale 3 or 4 Channels Kit - $99.95

3 or 4 Channels No foam or plastic Kit - $79.95

101" Big Stik 4 Channels. Kit - $129.95

113 size Standoff scale 4 Channels required Kit - $129.95 9’ “ MR. MULLIGAN” 1/4 size Standoff ·' scale 3 or 4 Channels Kit - $139.95

1/4 size Standoff scale Molded cowls Kit - $169.95 AUSTRALIA SWITZERLAND SOUTH AFRICA Ε Κ Logictrol Australia Blue Max OVERSEAS Radio Control World John Klassen Hobby Central Modellflug-Technlk AG 202/4 Oceana House 44 Macquarie Road DISTRIBUTORS 400 Cuyler Street Earlwood 2206 Alte Landstrasse 122 Lower Burg St. Sydney, Australia CH-8800 Thalwil Switzerland Capetown 8001 So. Africa Thunder Bay, Ontario THE THIRD ANNUAL CONSUMER TRADE SHOW

JANUARY 12 & 1 3 , 1 9 8 0 Pasadena Center, Pasadena, California HOME OF THE FAMOUS ROSE PARADE & ROSE BOWL SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF: MODEL AIRCRAFT MODEL ENGINES MODEL BOATS RADIO CONTROL SYSTEMS MODEL CARS o O f : MODELING ACCESSORIES INDOOR DEMONSTRATIONS STATIC DISPLAY COMPETITION IN MANY CATEGORIES SEE INDOOR R/C RECORD TRIALS AND FIRST R/C ROBOT CONTEST OVERSEAS EXHIBITORS CORDIALLY INVITED INTERNATIONAL MODELER SHOW. BOX 127. COSTA MESA. CA 92627; (714) 548-4700 most other drivers had to make a pit known it, as he whipped right past all the 6) Fruhwirth (A )...... 52 stop. By the time you pulled down the other cars and won his heat. In the 7) Rowland (U SA )...... 49 pit lane and drove to your specified meantime, Ishihara went out and bet­ 8) Errington (G B )...... 39 position, a pit stop could cost 8 to 10 tered his time, as did several of the other So now it started all over again on seconds. Japanese drivers. Sunday for the top 72 drivers. The One fact stood out: all the Americans incentive to be one of the top four (except Carbonell) and Japanese cars The top ten in the original qualifying qualifiers was high because everyone had straight rear axles, and practically all were: knew the semi races would be tough. the European cars had differentials. 1) Ishihara ( J ) ...... 7:18.57 The Sunday race program was three There was no doubt in my mind that the 2) C. Husting (USA) ...... 7:28.83 requalifying heats, with top four going straight axle cars were faster because 3) Carbonell (U SA )...... 7:29.89 to the Finale and the next twenty going traction was up. and the cars drove 4) Fusco (U SA)...... 7:34.50 into two 10-car semis with the top three much smoother (if you used a little will 5) Jianas (U SA)...... 7:34.57 finishers of each going to the Finale. power on your throttle finger). I had 6) Rold (USA)...... 7:40.35 Bill Jianas was really excited because 7) Bervoets (NL)...... 7:40.44 taken my differential out for the last day he had another chance to beat THE of practice. But when I talked to Phil 8) Phelps (U SA )...... 7:41.82 Japanese driver. Ishihara put the pres­ Booth he said he wasn’t going to remove 9) Sasuga (J) ...... 7:44.21 sure on again by turning a terrific 7:24.2 10) Takeda (J)...... 7:44.27 his because his driving style is now in the first round. Jeff Rold and Curtis Some of the names further down the list dependent on the differential, and he Husting both got some of the heat off didn’t think he could get the car set up were: 11) R. Ton, 13) P. Booth, 17) R. themselves by turning in 7:29 and 7:33 again for a straight axle. Hassig, 19) P. Greeno, 20) Sabattini, times respectively. Other drivers turning 24) U. Franke, 35) G. Ghersi, 38) K. The next two rounds of practice saw in good first round times were Phil Curtis Husting get in a very good heat, as Plested, and many more. Booth, Pieter Bervoets, Rick Davis, F. did Chuck Phelps. Rick Davis, Gene The Saturday schedule for the 65th to Sasuga, Rich Lee, Gino Ghersi, P. Hassig, Husting, and Rich Lee also got times that 128th place drivers was more of the and K. Takeda. same. Lots of crashes, problems, trash­ put them in the top thirty. But some of In round two the pressure was build­ the real clutch drivers did not have good ing, etc. Anybody who got any kind of a ing. In this round good times were times in the first two rounds. Jianas reasonable run made the semis, where turned in by Chuck Phelps and Ronnie hadn’t put one together, even with the there was a tough race to be in the top Ton. As you can see, lots of the big- fastest laps, but he stayed away from the three. Then again, any kind of a run in name, good drivers still had not made discs the last time. Art Carbonell had a the Saturday final was good enough to the program. differential go out on the first heat, and go to Sunday. The eight Saturday move- Repete Fusco started round three of challenged the discs the second heat ups were: Finale qualifying with a bang by running (and lost). Art said, “ This is just another 1) Grunder (CH )...... 60 a super race to come in second behind race,” relaxed and then zapped off a 2) Shudo (J)...... 60 Dave Martin (GB). Then Gene Husting good time. Little Repete Fusco had been 3) Kruhsberg (S)...... 59 pulled himself out of the five, as did having engine and car problems, but in 4) Dosch (D )...... 58 Ljungcrantz of Sweden, Errington (who his last heat you never would have 5) Codeluppi (J)...... 57 had moved up from Saturday), Kondo 74 R/C MODEL BUILDER

laps or so because the front plate on his We’ve Built the Case for engine was loose, probably sucking in air and screwing up the idle. Davis’ car looked pretty cockeyed, so he must Your Radio Control System have tangled with the dots, and was not running very fast. Toward the end of the race Jianas and Ishihara were both running laps in the mid 21 seconds and picking up time. The fastest lap I timed was a 21.3 second lap by Ishihara. Phelps was running right near 22 seconds, even without brakes, and Booth was at about 22.5 seconds. One U.S. driver looked like he took a couple of cheap shots at Ishihara, and I would have black-flagged or disqualified the U.S. driver had I been Single Case out there. So the question was, who was Reg S49.95 in the lead, and could Jianas or Ishihara Now S2 9 .9 5 catch them before the end of the race? So the race ended with no English- speaking people around me knowing - Π who won or the next positions. The finishing order of the Finale was presented earlier, but the remaining overall finishing positions were: 11) Kishi (J), 12) Suzuki (J), 13) Ljung- Double Case crantz (S), 14) Takeda (J), 15) G. Husting Reg. S69 95 (USA), 16) Sabattini (I), 17) Kondo (J), Only $39.95 18) Lee (USA), 19) Petri (USA), 20) Fusco (USA), 21) Hassig (CH), 22) Errington (GB), 23) Ghersi (I), 24) Bervoets (NL). I’m sorry I didn't watch Sasuga closer, because he was always in the top ten qualifiers. But my mind was boggled by Ishihara’s times: my ears came to atten­ tion by the screaming engines on the unloading differentials of Ghersi, Ton, It makes sense to want the best in protection for Sabattini, and Bervoets; and my eyes that major part of your radio control investment. That’s were dazzled by the driving of Ishihara why we designed highly durable, impact resistant, quality and Jianas. Sasuga was just another of cases custom built to fit your radio equipment. those smooth, quick, unnoticed Japa­ nese drivers. Sasuga went out and beat Completely foam-lined for added protection most of the name drivers every time. In fact, all the Japanese drivers looked these lightweight cases are now extremely smooth. Kishi, Takeda, and specially priced at just $29.95 e Kondo were also always quick. for a single radio system I would like to thank Johnny Brod- and $39.95 beck Sr. and K&B Manufacturing for for a double. providing fuel at cost and paying all shipping charges for the fuel used by most U.S. racers. It was a load off my mind when Johnny took care of the fuel ο Ό°° situation by shipping about 60 gallons of fuel to Geneva via his distributor (Hel­

TO ADDRESS mut Noll) in Germany. Also, thanks to IniΊ^^=Ιη\^ te BELOW 7316 NEWTON AVENUE NO.. MINNEAPOLIS. MN 55444 Phone (612) 566-9016 Stig Anderson of Viking Hobbies for holding the fuel until we got there. Thanks to MICRO-RACING for spon­ from the “ B" semi. They all looked seemed to be able to get by Ishihara soring (dollars) a good portion of the relaxed standing behind their cars, but I without too much difficulty on the first race program and a fabulous all-you- can imagine what they felt like inside. All part of the back straight, where accele­ can-eat-all-you-can-drink affair one had made it this far by being consistently ration really counted But early in the evening after qualifying. The food was fast. It is interesting to note that nine race Jianas had some trouble (hit some fantastic and plentiful and the drinks were in the top ten Sunday qualifiers, of those “ dots” and bent up the wing were large and cold. and six were in the original qualifying and body, I think) and was out fixingthe Finally, thanks to the Auto Modele top ten, with the others not far back. car for several laps. Husting led until lap Club de Geneve for putting on a fantas­ The start of the Finale was pretty clean, 38, when something let go and the car tic race. I hope the standards of prepara­ with Ishihara getting his usual good start, retired (it turned out to be a jammed tion and race conduct established at this as did Jeff Rold and Bill Jianas. Booth brake disc). After this I really don’t know competition can be upheld in the future. partially blocked Husting at the line, but who led or who was in the other posi­ NEXT MONTH: Technical evaluation this made little difference. Rold went tions. I would guess, though, that Phelps of the cars, drivers, and goings-on at the into the lead on the back straight with probably led for a while (to about 50 or 2nd World R/C Car Championships. · better acceleration than Ishihara. Rold 60 laps) when he completely lost his held the lead for about 15 laps when his brake pads and had to finish the race engine flamed out just past the start/ with no brakes. Ishihara also had some finish line. Curtis Husting then went into crash damage and was out for a while. the lead. Husting, Jianas, and Phelps all Rold continued to flame out every ten

76 R/C MODEL BUILDER SYSTEMS FEATURE • SMOOTH OPEN GIMBAL ACTION WITH CLOSED DUST COVER SHIELDS • TRIPLE TUNED FRONT END RECEIVERS • ACCESSORY PACKAGE WITH TRAYS AND EXTRA WHEELS OR ARMS

aero sport

I S } l ři! tZ m m m l

DEPENDABLE, BEAUTIFUL, ECONOMICAL, QUALITY CRAFTSMANSHIP & ELECTRONIC DESICN

aero sport aero sport aero sport aero sport 79" 105" 169" 189" Aero Sport Four Systems Include: 4 channel Aero Sport Two System» Include: 2 channel Aero Sport Three Systems Include: 3 channel Aero Sport Six Systems include S channel receiver, 2 channel transmitter, both for AA receiver, 3 channel transmitter, both for AA receiver. 4 channel transmitter, all Ni-Cads for receiver, 6 channel transmitter, all Ni-Cads for Alkaline battery operation (batteries not in­ Alkaline battery operation (battenes not in­ both transmitter and receiver airborne, dual both transmitter 4 receiver airborne, dual charg­ cluded)^ Aero SportNS-IC servos, dry airborne cluded)^ Aero SportNS-IC servos, dry airborne charger (charges both batteries at the same er (charges both sett of battenes at the tame battery box, switch harness, frequency flag, ex­ battery box. switch harness, frequency fla9, tim e),4 Aero Sport NS-IC servos, servo tray, ex­ time), 4 Aero Sport NS-IC servos, servo trays, tra servo wheels and full ISO day warranty servo trays and full ISO day warranty. Choice tra servo wheels, instruction book, frequency extra servo wheels, instruction book, frequency 72 mHi only. Of 7 2 o r 75 m M i. flag and full ISO day warranty. 72 mHz only. flag and full t BO day warranty 72 mHz only.

Hobby Shack takes particular pleasure in lowing you a choice of six different types to best knowing that we are offering the American modeler suit your needs. In fact all systems are shown in the the finest line up of radio systems and accessories at catalog w ith several servo options fo r the in itial pur: real money saving economical prices. For the past chase. This year we have introduced our brand new seven years we have been contracting fo r our radio stick assembly giving you open gimbal action with a systems to be manufactured by the largest and best dust shield to keep the dirt out. When you select an radio maker in Japan. This has allowed us to keep Aero Sport System you're getting quality, dependa­ pace with the new electronic technology and get bility, up to date engineering design, and back up ser­ quality craftsmanship. For 1979 we have four sys­ vice and warrenty. That's the reason we have always tems, giving you a choice of four radios to choose sold so many radio systems each year and know that from , depending upon your needs and progression we have the best fo r 1979. in the radio control hobby. There's only one ploce to get it. No one else that we know of as of this writing has a better two channel to offer you than our Aero Sport Two. Our two channel transmitter is an aluminum CHARGE IT ORDER BY MAIL vinyl covered case unlike all the other plastic cases. OR CALI US Only Aero Sport Two offers a triple tuned front end receiver the same as our other radio systems have. SAMUMBtKARD Shack. Area 714 Only the Aero Sport Two offers you three servo 18480 BANDILIIR CIRCLE ΠΡΟ OQQ types to select from when you make your purchase. FOUNTAIN VALLEY, 963-9881H O j ’ U O O We think the Aero Sport Two is the best two chan­ cards CALIF. 92708 nel you can buy at any price and our price is only Add $3.00 postage & handling $79.99. This year we have expanded our servos al­ California residents add 6% state sales tax La Mesa, CA 92041). These hold the wood in place without the hazard of splitting. Allow the spars to overhang HOT OFF THE PRESS!! end ribs by about 1 inch. Cement ribs in place on spars, with the exception of the NEW FIFTH EDITION root ribs on the middle and lower wing, which are angled to mate properly with fuselage contours. These ribs may be cemented after confirming correct Radio Control angle by slipping finished panels in place with appropriate dihedral setting. Cement leading and trailing edges in place, followed by tips, which have been laminated from two pieces of 1/32x1/16 The Radio Control soaked basswood, bent around a card­ Buyers Guide is the board or scrap balsa form. This is the authoritative guide to only place on the model (except prop) radio control products. It where white glue was used, all other is the master catalog of joints being secured with Ambroid or the industry with more Hot Stuff. (This is an R.O.W.,you know!) Leave laminations around form over­ than 2,300 products pic­ night. Waxing the edge of the form with tured, described, & pric­ a crayon or candle facilitates basswood ed. removal. The new edition has Add hard 1/16x1/4 balsa strut base more than 200 pages pieces as shown on plan. The pieces in showing the products of the center wing panels are drilled to more than 250 manufac­ allow clear passage of cocktail straw interplane struts. The struts are slightly turers. flattened to an oval cross-section. (Sub­ Included are the latest stitute balsa if you don’t drink cocktails!) model cars, boats, air­ Cementing 1/4-inch long balsa stubs craft, radio systems, (which fit inside straws) in place after the tools, books and ac­ wings have been covered makes it easier cessories. The Radio to accurately index the struts to the Control Buyers Guide wings. These stubs are on the underside is indexed and cross- of the top wing and on the top side of the bottom wing. Add 1/32 sheet gussets indexed for easy use. where ribs cement to trailing edge. This comprehensive Cut and carefully sand leading and catalog of the RC in­ trailing edges to proper airfoil shape. dustry is a must for every Tips should be sanded to semi-circular serious modeler! cross-section, tapering to fair in smooth­ Price: $7.75 ly with trailing edge. Construct top wing center-section. Please send m e ______. copies of the new 5th edition of the Secure this unit to workbench and slip Radio Control Buyers Guide. (Enclosed is $8.25 for each copy ordered right and left panels in place, allowing At Better — $7.25 retail plus $1.00 postage & handling). spar stubs to contact at center section center rib. The spar stubs will require Hobby tapering along the bottom to accom­ Shops N am e: modate the dihedral. Prop up tips 1/2 or Direct inch before cementing. Fill in between S tre e t: spar stubs with tapered "bridge spar” that makes allowance for the 5 degree sweepback. Add the four laminated V. C ity , S ta te . Z IP : ______Return to: RC Buyers Guide. Clifton House. Clifton, VA 22024 cabanestrut mounts. Laminationsshould be of two pieces of hard 1/32 sheet balsa, to make 1/16 inch thick parts. These will along for the ride. Think of the model as be drilled later to insert strut ends. Curtiss...... Continued from page 54 a parasol. The combined lift area of the TAIL two upper wings is more than enough. Construct vertical fin(s) and hori­ sembling model, tip floats may be held How flying characteristics would have zontal stab from 1/16 square balsa. in place under wing with 1/16 O.D. differed if we had followed conven­ Trailing edges are 1/16x3/16. Stab tips aluminum tube struts, fastened with tional practice is a moot point. are 1/16 sheet. Be sure to incorporate 1/32 wire, or you may prefer to use Cut 29 lifting airfoil ribs from 1/32 gussets as shown. Construction incor­ bamboo. We used the aluminum tube medium sheet balsa for upper wing porates 3/32x1/32 cap strips on ribs to held in friction fit with the wire fasteners. panels, and 14 streamlined ribs for the enhance rigidity. Sand surfaces to In case of rough landing, the float will bottom two panels. Pin both batches streamline shape. Note that each part separate from wing rather than transmit­ together for convenience of sanding allows the spar stub to protrude about ting stress to spars, etc. At least, that is and notching. Unpin and set ribs aside 1/4 inch. This makes assembly easier our theory. for a moment. when cementing surfaces to fuselage WINGS and provides a stronger installation. Being a Seat-of-the-Pants engineer, I Each wing panel follows the same Scallop trailing edges as shown. decided to try a theory that had been assembly technique; just don’t build six used with good success on another right-hand panels! PROP multi-wing model, and this is to make Secure hard 1/32x1/8 balsa spars over The four-bladed prop looks formid­ the two upper wings do the work, while plans with plastic "pin-downs” (avail­ able, but isn’t difficult to make. See the bottom one is streamlined and goes able from Peck Polymers, P.O. Box 2498, sketch for details. The blades are made 78 R/C MODEL BUILDER by laying up two pieces of 1/32 sheet balsa over a pitch block made from pine. Soak the sheet balsa blades in hot water DU-BRO PLATED BRASS for about an hour before applying white glue between laminations and binding them to the pitch block with a length of DURA-COLLARS an old rubber motor. Protect the balsa ENOUGH STOCK SO THAT THREADS WILL NOT STRIP CAN BE RE WORKED FOR blade with a piece of thin cardboard OTHER USES - NOT LIKE HARDENED STEEL A NICE IMPROVEMENT THAT HAS before binding. Make four blades, ALWAYS BEEN THERE STILL AVAILABLE IN SETS OF 4 COMPLETE WITH ALLEN letting each dry overnight on the block WRENCH. FOR MODELERS WHO DEMAND ONLY THE VERY before removing and shaping with 141- 3/16" BEST' 140- 5/32" ONLY .80 sandpaper to an airfoil section. 139-1/8" The center hub parts are cut from hard 138-3/32" balsa and slotted as shown to receive the 137-1/16" blades, which should have about a 40 to 45 degree angle at their centers. Wedge- fit all four blades and check for align­ ment and symmetry before cementing. Cut and sand hub so blades fair in smoothly, giving the prop a finished appearance. Drill hole in center to receive aluminum tubing which will motor accommodate the .045 prop shaft wire. This provides for free-wheeling. Prop FLEXIBLE control hook is bent in a conventional manner CAT. NO. and installed later, after prop and nose 165 block have received final coat of dope. A lightweight compression spring at the 20 ASSEMBLY hub front assists in disengaging free­ wheeling mechanism. O N L Y $ 1 .4 9 COVERING, ASSEMBLY, AND FINISH NO SHRINK . . NO STRETCH . . FREE RUNNING . . . MICRO ADJUSTABLE . The Curtiss 18-T-1 followed the con­ GREAT STRENGTH . . . QUICK. EFFICIENT temporary Naval aircraft color scheme. INSTALLATION PROCEDURE . HOT HUMID OR The top wing and stabilizer surfaces COLD DAYS DO NOT AFFECT THROTTLE SETTING . . . were chrome yellow and the balance of THE FINEST R/C ENGINE CONTROL CABLE ASSEMBLY AVAILABLE. the plane was either light gray or silver. Silver seems to make a more attractive model, so that is what we chose. All struts were painted with Floquil railroad n y l o n H I N G E S color, called “ concrete." THE FINEST HIGH PERFORMANCE RC AIRCRAFT HINGE AVAILABLE Model is covered with Japanese tissue. PRECISION MOLDED , TABS ARE EMBOSSED TO ^ You can use silver tissue, however, we ASSURE A "FAIL SAFE" BOND IN THE RECEIVING / elected to spray the pigment on white SLOTS 031 TAB THICKNESS FOR GREATER / tissue. Wing and tail covering does not need STIFFNESS AND LONGER LIFE STEEL any special mention. The only sugges­ HINGE PIN FIRMLY LOCKED IN PLACE tion we might make istospray theentire INSTALL DU-BRO HINGES AND YOU model framework with diluted clear KNOW YOU WILL HAVE THE VERY dope before covering. When flying off BEST. No. 116 ( 6 each! $1.10 / MINI \ No. 118 $1.00 water, the model is sure to get soaked No. 117 (15 each) $2.49 V SIZE / No. 119 S 1 95 once in a while. The doping slows down the water absorption, thereby prevent­ ing excessive weight gain. KWIK-HINGE We never did have much luck with covering with wet tissue, but the fuse­ lage might lend itself to this practice if SLOTTED you have had success with it. We chose FOR LARGE AND SMALL HINGES. to cover dry, cutting tissue widths THE ONLY UNIVERSAL SLOTTING TOOL THAT NOT ONLY CENTERS, corresponding to the distance between BUT GUIDES YOUR BLADE FOR former bays and wrapping about one- PERFECTLY ALIGNED HINGE quarter around the fuselage circumfer­ SLOTS EVERY TIME! ence. Start at the tail, and be sure tissue The black oxided. hardened steel grain runs parallel with fuselage center- blades fit neatly in a no. 2 x-acto knife handle and work in coniunction line. The main float is covered in the with our handy alignment jig that same manner. Cover float bottom (which features 3 interchangeable snap-on is 1/32 sheet) with tissue also. Shrink guides. Two for large and small leaf tissue with alcohol spray. hinges, and one for drilling 3 stan­ dard size holes to match any type of The covered model is sprayed with hinge you choose to use. ■ ALSA »ICKCH two coats of diluted 1-to-1 clear nitrate dope, with plasticizer added to prevent only $1.95 Cat. No. 216 excessive warping. Pin down wings and tail surfaces during drying. The third, and last, coat of dope has silver powder DU-BRO PRODUCTS1 added. We added about a toothpaste tube capful to an ounce of dope. You INCORPORATED don’t need more. This allows the trans­ 480 Bonner Road Wauconda. Illinois 60084 U.SA lucent quality of the tissue to be main-

NOVEMBER 1979 79 1979-1980 TOWER HOBBIES RADIO CONTROL CATALOG!

Absolutely the finest catalog ^ available in RC

0 358 illustrated pages

Φ Super discounted prices ------^ 1.1*1 ΙΛΙ Φ Over 150 manufacturers to choose from

Φ Complete information

Φ Easy to use indexes to help you find \ι>»·'ϊ .:1Ϊβ what you need quickly

Section introductions to answer your modeling questions

Devcon THE GUIDE TO ALL YOUR MODELING NEEDS! Introducing the catalog you've been waiting for - the NEW mat. This chart enables you to determine what accessories you 1979-1980 Tower Hobbies RC Catalog! This is the largest and will need to complete the kits listed in this catalog. most complete RC catalog ever published, by far! This new cat­ Other outstanding features of this catalog are the special sec­ alog is much more than just a list of available products at super tion introductions that appear throughout. These introductions low prices. It's actually a complete modeler's reference guide, were written specifically to add to the general knowledge of featuring two indexes (manufacturer and product indexes) to someone new to the RC hobby. Even if you've been a Tower make finding a needed item fast and easy. customer for years, we hope these introductions will answer We developed the actual descriptions from a modeler's point some of your questions, provide you with helpful hints, and of view! We know from experience the questions you need an­ entertain you! swered in order to make that important buying decision. If after Remember, this 358 page Tower Hobbies RC Catalog was reading the descriptions, you still aren't sure of something, you developed for you, the modeler, and contains everything you'll can use the TOWER ACTION POST CARDS supplied inside the need to enjoy your hobby to its fullest! This Radio Control catalog to write directly to the manufacturer for more informa­ "Bible of the industry" will be included free of charge with tion. This is just another customer-oriented service you've come your first merchandise order from Tower Hobbies. Or, it's to expect from Tower! We've also included a revised and up­ available by itself for $2.50 postpaid. ORDER TODAY! dated accessory completion guide in an easy to use chart for­ ILLINOIS TOLL FREE:

Aw 800- 637-7686 800- 252-3336 THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTH OF THIS ISSUE. ONLY. ALL SPECIAL PRICES ARE SUBJECT TO CHANGE IF RETAIL PRICES CHANGE DURING SALE PERIOD. MILLER No.2017 QUADRA 2 CU. IN. 29% TOP F LIT E 30% D R EM EL OFF SPRAY SET ENGINE OFF SEALING IRON M O D EL 381 M O T O -T O O ! L WITH FULL \ ACCESSOR IE This sealing iron is great for covering with Monokote, Solar- The Model 381 is the ultimate in Complete set includes a precision Develops 2 horsepower! An engine film, etc. It features adjustable hand grinders. It features variable temperature, teflon shoe, and a built genuine piston type air com­ suitable for large models with its speed control, ball bearings, and pressor, 12 ft. air hose, 16G siphon scale-like sound and realistic per handy shape. Excellent quality. full accessories. type spray gun & 14G air brush both formance. Comes with muffler, RETAIL NOW ONLYS13.98 RETAIL NOW ONLYS46.98 with open & fine spray nozzles. mount, and Tillitson pump/carb. $19.95 MBM313 $74.95 MBM153 RETAIL NOW ONLY $48.98 RETAIL NOW ONLY $99.98 $81.95 MBM228 $139.95 MBM260 G O LDBERG 40% K&B .40 RC ENGINE 35% DEVCON 36% OFF DREMEL 572 FALCON 56 MK II OFF No. 8011 OFF 5 M IN U T E MOTO SF EPOXY IN T H E M O ST ECONOMY POPULAR RC ENGINE EVER 9 O Z. SIZE MADE!)

Now in squeeze Features a unique design for high bottles for your This deluxe saw features a complete This all time best seller is now re­ designed with ailerons. 56" span. power; and a Perry carburetor accessory set of blades, discs, etc. convenience. Limit Uses a .30 -.40 engine, all balsa for excellent throttle response and of 3 per order. and flexible shaft. construction. An excellent trainer. easy adjustment - from a slow RETAIL NOW ONLY $3.98 RETAIL NOW ONLY $62.98 RETAIL NOW ONLY $28.78 smooth idle to a roaring top speed. $6.25 MBM151 $99.95 MBM154 $47.98 MBM020 RETAIL NOW ONLY $46.98 $72.50 MBM200 POWER PACER 22% G O LDBERG 40% SULLIVAN ELECTRIC B O L IN K B A T T E R Y OFF SKYLARK 56 OFF STARTERS ELECTRIC CAR TESTER M K II

A nicad battery tester, cycler, and charger. Detects weak and faulty Extensively improved construction, Hi - torque, hi - rpm 12 v. starters. cells. Charges at a safe 50 MAH strength, and flight performance! These heavy duty, long life starters This 2 ch. 1/12 scale electric car develop more torque and rpm's than comes already assembled w ith .05 rate. Reads battery capacity in 56" span. Requires a .30 -.40 size any other starters! motor, nicads, & charger. Goes over MAH. Compatible with all popular engine and a 4 ch. radio. This fun RETAIL NOW ONLY $24.98 25 miles per hour! radios. Order according to trans­ to fly balsa sport plane has pattern $38.95 MBM305 RETAIL NOW ONLY $79.98 mitter voltage. capabilities. It makes a great Dlx. model has V-groove In drive $99.95 MBM118 cone for starter belt. Starts copters, Bolink kit for above car - must RETAIL NOW ONLY $46.98 low-wing trainer. airplanes, boats, and cars. be assembled. BLX-155. $59.95 RETAIL NOW ONLY $29.98 RETAIL NOW ONLY$27.28 RETAIL NOW ONLY $59.98 9.6 v. MBM259 6v.MBM024 $49.95 MBM181 $41.95______M BM 306 $79.95______M BM117 C R A F T -A IR 33% C R A F T -A IR 34% C R A F T -A IR 30% S & O BATTERY 33% D R IF T E R II OFF TESTER OFF FIE LD BOX OFF HI - START OFF H E A V Y D U TY %ÁÍ Features reel, tubing, towline, •

, a 9 CHAMPAIGN, ILLINOIS 61820

THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTH OF THIS ISSUE, ONLY. ALL SPECIAL PRICES ARE SUBJECT TO CHANGE IF RETAIL PRICES CHANGE DURING SALE PERIOD.

! HOW TO ORDER HOW TO ORDER HOW TC ORDER HOW TO ORDER HOW TO ORDER

BY MAIL ORDER BY TOLL FREE PHONES

Ä If you have a Tower order form, please use it. If not, then just use any When you place your order over the phone we will ship it to you C.O.D., j piece of paper or stationery. Write down all of the items that you want and you pay for it when it's delivered to your door. When you phone in your order, please have the stock numbers written down ready to give to I along with their special stock numbers and prices. Total them up (Illinois the order taker. I residents add 5% sales tax) and add $2.50 for postage, handling, and full I insurance, to obtain the grand total. Obtain a money order, certified check, Continental United States: Illinois Residents Only: j bank check, or write a personal check for the grand total amount (personal checks may be delayed to allow for clearance). Foreign orders add $10.00 800 - 637 - 7686 800 - 252 - 3336 j (excess will be refunded with order). Date of postmark determines special ' period eligibility. Send your order along with full payment to: TOWER The "800'· WATS lines are open weekdays from 9:00 A.M. to 5:00 P.M., j] HOBBIES. P.O. BOX 778, CHAMPAIGN, ILLINOIS 61820. Monday through Thursday evenings 5:00 P.M. to 9:00 P.M., and 10:00 A. M. to 5:00 P.M. on Saturdays. Closed Friday evenings and Sunday. I STOCK NOW STOCK NOW I NUMBER DESCRIPTION RETAIL ONLY NUMBER DESCRIPTION RETAIL ONLY I MBM417 Air Capital RTF FB 100 ...... S 139.95 $129.98 MBM1 71 Fox .36 R C ...... $39.95 S25.98 MBM105 Airtronics Aquila ...... 74.95 52.48 MBM1 77 Fox 1.2 Cubic Inch T w in ...... 250.00 174.98 MBM106 Airtronics Olympic 11...... 49.95 34.98 MBM1 75 Fox -60 RC Eagle...... 69.95 41.98 j Μ BM 107 A-Justo-Jig Wing & Fuse J ig ...... 59.95 41.98 MBM 1 72 Fox 40 RC S ch n e u rle ...... 45.95 28.48 j MBM395 Andrews Aeromaster T o o ...... 84.95 51.98 MBM 1 74 Fox .45 RC Schneurle BB ...... 64.95 39.98 i Μ BM 112 Associated RC 200 Car K it 195.00 1 19.98 MBM392 Goldberg Falcon 56 MK II ...... 47.95 28.78 MBM411 Associated RC 300 Car Kit - NEWI! . 190.00 129.98 MBM 181 Goldberg Skylark 56 MK I I ...... 49.95 29.98 I M BM 113 Associated 6 Cell Car K it No.3012 . . 102.00 69.98 MBM 182 Goldberg Skylane 6 2 ...... 64.95 38.98 M BM 412 Associated 6 Cell Car Asmb. No.3024 119.50 82.98 MBM 183 Goldberg Senior F a lc o n ...... 64.95 38.98 j MBM114 Badger 200 1 A ir Brush K i t ...... 32.95 22.98 MBM 184 Goldberg H andi-Tote...... 16.95 11.88 j M BM 1 15 Badger 200^3 Deluxe K it...... 42.95 29.98 MBM403 Goldberg P6E Curtiss Hawk Bipe . 44.95 29.98 I MBM 116 Badger 180 1 Compressor . . 85.00 59.48 MBM 185 HB .12 RC BB w /M u ffle r ...... 39.87 28.98 MBM117 Bolink 6 Cell Car K i t ...... 79.95 59.98 MBM 186 HB .15 RC BB w /M uffler ...... 43.23 31.98 M BM 118 Bolink 6 Cell Electric Car K i t ...... 99.95 79.98 MBM 187 HB .25 RC BB w /M u ffle r ...... 56.00 40.88 i MBM 396 Bridi D eception...... 89.95 61.18 MBM 1 88 HB 40 RC B B ...... 69.44 49.98 MBM 121 Bridi Sun Fli 4 20 ...... 29 95 20.38 MBM 404 HB 40 RC BB PDP M a r in e ...... 93.50 66.98 ' MBM 1 23 Bridi RCM Trainer 4 0 ...... 54.95 37.38 MBM 189 HB .50 RC BB ...... 76.27 54.98 j MBM 125 Bridi Dirty Birdy - wood ...... 59.95 40.78 MBM 190 HB .40 RC BB PD P...... 84.34 61.98 I MBM 126 Bridi RCM Trainer 60 . 62.95 42.78 MBM 191 HB .61 RC BB PDP...... 119.26 87.68 Í MBM 1 30 Bridi UFO - fiberglass...... 129.95 89.98 MBM430 Hi Flight Mirage...... 59.95 41.98 I MBM 132 Coverite Balsarite 8 o z ...... 3.20 2.38 MBM 192 Hobbypoxy Formula 2 Epoxy 8 oz . 4.25 2.98 MBM 133 Coverite Glaskote p t ...... 3.20 2.38 M BM 193 Hot S tu ff Adhesive .5 oz...... 3.95 2.78 ) MBM 400 Cox Hydroblaster w/.049 & Radio . . 1 10.95 74.98 MBM 194 House of Balsa P 51D ( 29 to 401 . . 64.95 39.98 • MBM 137 Cox RTF Cub w/Engine & Radio . . 99.95 69.98 MBM389 House of Balsa .40 P-51D glass. . . . 109.95 79.98 i MBM 138 Cox RTF Cessna C e n tu rio n ...... 69.95 48.98 MBM 197 Jemco F4U 1 A C orsair...... 79.95 55.98 J MBM 418 Cox RTF Piper A rrow ...... 74 95 52.48 MBM424 K&B 19 R C ...... 50.00 32.48 ] MBM 139 Cox RTF Sportavia Trainer . . . . 89.95 62.98 MBM205 K&B .21 O u tb o a rd ...... 107.00 68.98 MBM 134 Cox Tee Dee 049 Engine - - - - 24.95 14.98 MBM406 K&B .21 RC Schneurle w/Muffler . . 72.50 47.98 I MBM 135 Cox Tee Dee 09 Engine ...... 26.95 17.48 MBM200 K&B .40 RC Engine ...... 72.50 46.98 I MBM 387 Cox Tee Dee 051 E n g in e ...... 24.95 15.48 MBM201 K&B .40 RC Pressurized...... 105.00 64.98 j MBM427 Cox Tradewinds Sailboat...... 169.95 84.98 MBM207 K&B 40 RC Sport Marine...... 82.50 52.98 j MBM 146 Craft Air Butterfly II ...... 49.95 32.48 MBM 203 K&B .61 RC w /M u ffle r...... 96.50 59.98 ] MBM 1 42 C raft-Air D rifter I I ...... 19.95 13.98 MBM 204 K&B .61 RC w/Muffler & Pump . . . 125.00 76.98 I MBM 141 Craft Air H.D Hi Start...... 49.95 32.98 MBM438 K&B .40 RC RE Schneurle w/Muff. . 110.00 69.98 j MBM 148 Craft-Air Field Box ...... 29.95 19.98 MBM419 Kraft RTF Electric Cardinal ...... 99.95 74.98 5 MBM 423 Craft A ir Piece O' Cake...... 24.95 17.48 MBM420 Kraft Electric M otorcycle ...... 79.95 59.98 1 MBM 409 Craft A ir Upstart (3/16 in c h ) ...... 17.95 12.58 MBM208 L&L On Board Ignition System . . . . 23.95 17.98 MBM 145 Craft-Air Viking MK 1 Sailplane. . . . 79.95 49.98 MBM210 Lanier Caprice...... 74.95 46.98 II MBM 149 DAE Series IV Power P a n e l...... 38.95 24.98 MBM407 Lanier Comet I I ...... 64.95 40.98 MBM 151 Devcon 5 min. Epoxy-9 oz . . . . 6.95 4.48 MBM213 Leisure 1/8 Dune Buggy...... 199.95 163.98 M BM 416 Dremel N o.730 Disc Belt Sander . . . 89.95 59.98 MBM432 Mark's Bird of Time G lid er ...... 59.95 38.98 MBM 152 Dremel 210 Drill Press...... 23.95 15.98 MBM215 Mark's Models Bushwacker w/Acces 52.95 33.98 ! MBM 153 Dremel 381 M oto Tool K i t ...... 74.95 46.98 MBM214 Mark's Models Wanderer 7 2 " ...... 23.95 14.38 MBM 154 Dremel 572 Deluxe Moto Shop . . . . 99.95 62.98 M BM 217 MEN Trainer 1 5 .2 5 ...... 31.95 22.98 MBM 155 Dremel 580 Table Saw ...... 99.95 62.98 MBM218 Microflame 4400 Dlx. Welding Kit . . 39.95 29.98 MBM 156 Dubro Lg. Nylon Hinges ( 1 5 ) ...... 2.49 1.88 MBM 220 Midwest RK 40 Axiflo Fan Kit . . . . 49.95 34.28 MBM 157 Dubro Flex Cable 2 0 " ...... 1.49 1.18 MBM221 Midwest Little S tik ...... 33.95 21.98 1 MBM 158 Dubro Kwik Fill Fuel Pump...... 10.98 6.98 MBM222 Midwest Cardinal A R F ...... 32.95 21.38 ! MBM 159 Dubro No. 203 Kwik-Switch Mount . 1.75 1.38 MBM223 Midwest Super Chipmunk ...... 33.95 21.98 MBM 160 Dubro Kwik-Hinge Slotter...... 1.95 1.58 MBM 224 Midwest Sweet S tik ...... 42.95 25.78 MBM 163 Dumas Atlas Van Lines U -1 ...... 52.50 33.98 MBM226 Midwest Attacker...... 44.95 28.98 MBM 162 Dumas Big Swamp B u g g y ...... 37.00 23.98 M BM 228 Miller No.201 7 Spray S e t ...... 81.95 48.98 MBM 164 Dumas Competition DV60 glass. . . 105.00 66.98 MBM 410 Monogram RC Electric Leopard Tank 49.95 29.98 MBM 401 Dumas Dauntless...... 75.00 47.98 Monokote Reg. and Trans. Colors. . . 9.00 5.38 ■ MBM 165 Dumas Hot Shot 24” Tunnelhull . . . 33.50 21.78 Monokote Metallic Colors ...... 10.50 6.28 MBM 166 Dumas Hot Shot 21" glass...... 72.50 46.98 MBM 230 MRC RTF Cessna w/Enya .35 RC . 449.95 277.48 MBM 429 Dumas Sail Control U n it...... 55.00 39.98 MBM 231 MRC RTF Cherokee w/Enya .40 RC . 499.95 314.98 MBM 167 Edson Adjustable Motor Mount. . . . 6.95 5.58 MBM 229 MRC RTF Hawk Trainer w/Enya .15. 99.95 74.98 Enya Engines ...... Call For Low Prices MBM 422 MRC Lamborghini Countach Special . 84.98 63.68 : MBM 168 Fox .15 RC Schneurle ...... 37.95 22.78 MBM 237 MRC 1/12 Scale Leopard Tank . . . . 199.98 139.98 MBM 169 Fox .19 RC Engine...... 36.95 22.98 MBM 233 MRC Porsche 934 Turbo ...... 74.98 49.98 MBM 1 70 Fox .25 RC E ngine...... 36.95 22.98 MBM 235 MRC FMC Combat Vehicle ...... 84.98 63.68 i| MBM 338 Fox .35 U /C ...... 26.95 17.98 M BM 421 Bud Nosen P-51...... 169.95 109.98 PHONE ILLINOIS TOLL FREE: 800-252-3336 (217) 384-1010 CONTINENTAL UNITED STATES TOLL FREE: 800-637-7686

THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTFfOF THIS ISSUE, ONLY. ALL SPECIAL PRICES ARE SUBJECT TO CHANGE IF RETAIL PRICES CHANGE DURING SALE PERIOD.

s t o c k NOW NUMBER DESCRIPTION RETAIL ONLY MBM238 Ohio Superstar Softglas Q t ...... $9.95 $7.98 Μ BM 239 OPS .40 RC Marine w/Tuned Pipe . . 155.00 119.98 NOW s t o c k ; Μ BM 426 OPS 60 Ursus w/Perry Carb...... 130.00 99.98 MODEL ONLY NUMBER - MBM241 OPS 60 RC Big Red w/Pipe 188.00 139.98 M BM 240 OPS .65 RC Marine w/Tuned Pipe . . 230.00 169.98 M BM 242 Orline Fokker D V II ...... 97.50 74.98 M BM 428 Orline Sopwith Pup NEW!!...... 119.50 89.98 MBM 248 Pacer X 30 Adhesive .36 o z ...... 3.50 2.28 6 Channel w/2 KPS-14II Servos S 149.95 MBM397 I MBM 249 Pacer Zap Giant 36 o z ...... 3.50 2.28 6 Channel w/3 KPS-14II Servos 174.95 MBM 398 MBM 251 Pica Cessna 1 8 2 ...... 99.95 66.98 6 Channel w/4 KPS· 1411 Servos 199.95 MBM 339 MBM 253 Pica T -2 8 B ...... 89.95 59.98 MBM 255 Pica W a c o ...... 89.95 59.98 6 Channel w/4 KPS-15II Servos 209.95 MBM340 MBM 256 Pica Duelist 2/40 89.95 59.98 Tower KPS-1411 Servo...... 25.00 MBM399 MBM 259 Power Pacer 9.6 v. Model 3 0 0 ...... 59.95 46.98 THIS SALE IS NOT RETROACTIVE MBM 260 Quadra 2 Cu. In. A ircraft Engine . . - 139.95 99.98 NOW STOCK MBM 262 Robart Incidence Meter ...... 15.95 10.98 MBM 263 Robert Super Pumper Mark II ...... 17.95 11.98 MODEL RETAIL ONLY NUMBER MBM 264 Robart Auto M ix ...... 9.95 7.48 KRAFT KRAFT KRAFT KRAFT KRAFT KRAFT MBM 265 Rhom 2 Gear Mains...... 87.00 56.58 MBM 266 Rhom 3 Gear F ire w a 'I...... 125.00 79.98 KP-2AW (Wheel) w/14IIA's. . . S139.95 S91.98 MBM 344 MBM 267 Rhom 3 Gear-Flat M ount...... 125.00 79.98 KP-2AW (Wheel) w/15IIA's. . . 145.95 95.98 MBM 345 MBM 268 Royal Photocell Tachometer...... 39.95 33.98 MBM 272 S&O Battery Tester...... 29.95 19.98 KP-2A (2 Stick) w/14IIA's . . . 139.95 91.98 MBM 346 M F.M 2 74 Sealector Custom Model Iron . . . 28.35 18.98 KP-2A (2 Stick) w/15IIA’s . . . 145.95 95.98 MBM 347 M BM 415 Sig Beechcraft Bonanza NEW!! . . . 69.95 52.48 139.95 91.98 MBM 348 MBM 275 Sig Piper J 3 C u b ...... 44.95 32.38 KP-2AS (1 Stick) w/14IIA's . . MBM 276 Sig Kadet T ra in e r...... 39.95 28.78 KP-2AS (1 Stick) w/15IIA's . . 145.95 95.98 MBM 349 M BM 279 Sig K a v a lie r...... 44.95 32.38 KP-3AS w /KPS-14IIA's...... 149.95 99.98 MBM 433 MBM 277 Sig Kougar...... 47.50 34.18 MBM 278 Sig Sm ith M in ip la n e ...... 54.95 39.58 KP-3AS w /KPS-15IIA's...... 155.95 103.98 MBM434 MBM 282 Skyglas Phoenix 5 ...... 55.00 36.98 KP-4A w/KPS-1411 A 's ...... 309.95 191.98 MBM350 MBM 285 Slimline Std. Muffler for K&B .35 .40 9.95 5.98 Solarfilm Reg. Colors...... 7.98 4.48 KP-4A w /KPS-15IIA's...... 321.95 200.98 MBM351 MBM 304 Sonictronics N o.1250 12 v. Fuel Pump 15.95 11.98 KP-6A w/KPS-1411 A 's ...... 339.95 212.98 MBM352 MBM 431 Spickler Quickie 5 0 0 ...... 43.95 32.98 MBM353 MBM 288 Southern RC Compensator glass . . 89.95 58.48 KP-6A w /KPS-15IIA's...... 351.95 219.98 MBM 290 Stafford B 24D Liberator...... 199.95 135.98 KP-5C w/14ll's or 1511's...... 389.95 274.98 MBM354 MBM 291 Stafford Twin Comanche balsa . . . 149.95 104.98 KP-5CS w/14ll's or 15ll's. . . . 389.95 274.98 MBM355 MBM 293 Sterling Puddle Jumper...... 17.95 12.58 MBM 294 Sterling Puddle Jumper MK II ...... 41.95 29.38 KP-7C w/14ll's or 15ll's...... 529.95 377.98 MBM356 MBM 295 Sterling Fledgling 41.95 26.48 KP-7CS w/14ll's or 1 5ll's----- 529.95 377.98 MBM 357 MBM 296 Sterling ’/,A Corsair...... 31.95 20.98 MBM 305 Sullivan Electric S tarter...... 38.95 24.98 KPS-14II Servo...... 44.95 34.88 MBM358 MBM 306 Sullivan Deluxe Starter...... 41.95 27.28 KPS-15II Servo...... 44.95 34.88 MBM359 MBM 307 Sureflite Skylane 182...... 39.95 25.98 KPS-18 Servo (Super Mini) . . . 54.95 43.98 MBM 360 MBM 308 Sureflite All Foam J 3 C u b ...... 39.95 25.98 MBM 309 Sureflite !4A J-3 - foam ...... 29.95 19.48 KPS-14IIA Servo...... 39.95 27.98 MBM361 MBM 310 Sureflite Spitfire foam ...... 39.95 25.98 KPS-15IIA Servo...... 42.95 29.98 MBM362 MBM 390 L.R Taylor Multi-Charger...... 24.95 19.98 MBM 408 L.R. Taylor Super Power Panel .... 89.95 69.98 KPS-20 Ball Bearing Water MBM 425 Top Flite Contender 4 0 ...... 49.95 32.98 Resistant Servo...... 49.95 38.98 MBM435 MBM 316 Top Flite Contender 60 ...... 56.95 36.98 MBM 320 Top Flite F4U 1 A Corsair...... 99.95 59.98 FUTABA FUTABA FUTABA FUTABA MBM 315 Top Flite Freshman Trainer...... 47.95 30.98 FP-2GS...... 109.95 72.98 MBM363 MBM 314 Top Flite Heat Gun...... 29.95 19.98 MBM364 MBM 317 Top Flite P-51D M ustang ...... 74.95 44.98 FP-2F w/S-7's...... 149.95 98.98 MBM 313 Top Flite Sealing Iro n ...... 19.95 13.98 FP-2F w/S-18's or S-22's...... 134.95 89.98 MBM365 MBM 413 Top Flite Trim Seal Tool...... 14.95 10.98 149.95 98.98 MBM366 i MBM 311 Top Flite 10x6 (6) Super Maple. . . . 8.10 5.68 FP-2E w/S-7's...... MBM 312 Top Flite 11x7 (6) Super Maple. . . 9.30 6.48 FP-2E w/S-22's...... 134.95 89.98 MBM367 MBM 321 Tower RC Long Plugs - 6 Plugs .... 8.94 4 68 FP-3S w/S-18's...... 144.98 94.98 MBM368 MBM 322 Tower 12 v. Starter Battery - w et. . . 25.95 12.98 MBM369 j MBM 323 AFI 12 v. Battery Charger...... 8.95 6.98 FP-3S w/S-20's...... 169.95 109.98 MBM 325 Tower Rubber Bands Vi Lb. No.64 . 1.50 .98 FP-3FN w/S-18's or S-22's . . . 219.95 139.98 MBM383 MBM 329 VK Cherokee ...... 72.95 50.98 MBM370 MBM439 Webra .61 RC Schneurle (Speed) . . . 229.80 119.98 FP-4FN w/S-18's...... 289.95 179.98 MBM440 Webra .91 RC Schneurle...... 268.35 144.98 FP-4FN w/S-16's...... 319.95 199.98 MBM371 : MBM331 Wing Mfg. The Love M a c h in e ...... 69.95 34.98 FP-5FN w/S-18's...... 319.95 204.98 MBM372 MBM334 X-Acto No. 5087 Knife & Tool Chest 29.95 20.98 MBM 336 Zinger Props 9x6 6 each ...... 7.80 5.48 FP-5FN w/S-16's...... 359.95 222.98 MBM373 MBM337 Zinger Props 10x6 6 e ach ...... 8.40 5.88 FP-6FN w/S-18's...... 339.95 209.98 MBM374 MBM338 6.68 Zinger Props 11x7 6 e a c h ...... 9.60 FP-6FN w/S-16's...... 369.95 234.98 MBM375 I S-7 Servo...... 39.95 29.98 MBM379 29.98 MBM378 J Remember, these are only a few of the several thousand different I S-16 Servo...... 39.95 22.48 MBM377 items that Tower Hobbies stocks. If you need an item that does I S-18 Servo...... 29.95 39.95 29.98 MBM437 | not appear in this issue, give us a call to see if we have it. The I S-20 Servo (M in i)...... chances are good that we do. By all means compare our prices SANWA I before you buy elsewhere; you'll be dollars ahead. SANWA SANWA SANWA SANWA No.8020 2 Channel...... 99.95 69.98 MBM380 ______THE NEW MINI-STARTER STARTS THE SMALL ONES FAST!

Quick, sure starts are a must in today's competitive environment. Whether you are a Vi-A Pylon Racer who doesn't want to be left in the blocks, or a free flighter who wants to go when the thermals are there, you need this Mini Starter. It is specially designed for '/. A glow motors, and features a 12 volt high speed permanent magnet motoi with a ball bearing front end The drive cup is designed to fit the Cox T.D prop nut 01 a small spinner, and a groove for a marine 0 ring is piovided A rubber boot for flywheel starting of Jerobee cars is also provided ( All these deluxe features for only S19.95. Available at your dealer now. Our nifty new Power Panel is specially designed to pro­ vide proper power forms to your starter, glow plug and fuel pump. It features high and low glow plug outputs and a center off reversing switch for your fuel pump. The perfect mate for our mini starter and gelt cells. ONLY

S24.95. ALSO AVAILABLE: 12 Volt Gel Cells . . 4-Amp. $28.95 . . . 6-Amp, $ 34.95 12 Volt Battery Chargers ...... $8.95 Everything for your electrical needs. Send Self- addressed stamped envelope for your free catalog. RSTRO FLIGHT IRC 13377 BEACH AVENUE, VENICE, CALIFORNIA 90291 PIONEERS IN SILENT FLIGHT

tained. All solid balsa parts such as the fuselage and on top of upper wing and cement to support pieces inside the nose block, tail fairing, float nose, and bottom of lower wing is white with black fuselage. Cut holes in the cabane strut tail cone should be prepared with two outline. The A 3325 serial number is cut mounts on the underside of the top coats of sanding sealer, before spraying from black tissue. A red band which wing center-section. The bamboo with silver. denotes danger area immediately below cabanes should slip into these snugly. Engine valve covers and exhaust stacks prop arc on the main float is 1/8x1 inch Eyeball the top wing for alignment and are painted black. We rubbed them with red tissue applied across float top. incorporate about 2 degrees incidence powdered graphite to simulate the Assembling a triplane calls for a little before Hot Stuffing the wing in place. worn metallic look. more care than putting the wings on a Slip center and lower wings in place, The prop is stained mahogany brown Taylor Cub. The procedure we used with the spar stubs (hopefully) touching and given two coats of clear dope. seems about as good as any: where they meet inside the fuselage. Numerals and insignia are cut from Cut and position bamboo cabane The center wing should have about 1 colored tissue and doped on. The large struts. These penetrate the balsa filler degree incidence, the bottom 0. Posi­ numeral five which appears on the pieces surrounding the cockpit, and tion the model upside-down on work­ bench, cushioning the top wing center- section with soft rags to prevent distor­ tion of dihedral. Now clear everybody Cm CURACAO MOOELBOUW out of the room and lock the door. This ~ ^ PRESENTS FOR THE U.S.A. MARKET is the time you will wish you had an MODELBOATS & - SHIPS, oldtimers as well as modern. auxiliary hand as there are a lot of wings flopping around. i All highest quality hobby kits. SLAVER Force interplane (straw) strutsthrough • Over 90 models to chose from t "AGILIS" the holes provided in center wing. Index • All features complete with english instructions incl. the struts over the short stubs in top and • Precision fittings and details bottom wings. These were described e Wide range of propulsion systems available earlier. Check wing gap with dividers to • Suitable for R/C. make sure everything is OK. Check wings from top, front, and rear, before applying cement to struts and wing roots. Spar braces should be cemented % to spars inside the fuselage. If everything looks good, pick up the model and

Complete catalog showing a number of other interesting kits will be sent to admire it. Unlock the door. you on receipt of US$4,- to cover airmail charges (refundable with first order). The fin(s) and stab are installed in a CURACAO MODELBOUW - P.O. BOX 470 similar manner. Set stab at zero degrees Curacao, Neth. Antilles incidence. No provision is made for mail orders retail · wholesale import and export design custombuild incidence changes. If this is necessary, install a small trim tab.

84 R/C MODEL BUILDER LOOK FOR MONEY SAVING , A S u p e r OFFER WHEN YOU BUY THE - * NEW STERLING SPACE SQUIRT. “SURfflEE U B C ifl ·’ I Background - Official NASA Photograph SPACE SQUIRT k it ω i

Length 24 Width 7% $24.95 Engine .049

A snappy Land Vehicle developed for 2 channel R/C, expertly designed featuring accurately die-cut Balsa, precisely vacuum-formed parts, Hardware and detailed Plans and Instructions. REAL SCALE-REAL ENGINES

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Flying wires are of 2-pound nylon approximately at front wing spar. Power success in tying a length of thread to the fishing leader, sprayed silver. These model with 8 strands of rubber, 24 stern of the float, allowing it to trail in wires, which are not difficult to install, inches long. Always lube before flying. the water and somewhat counter the not only add to the character of the R.O.W. takeoffs need quite a bit of drag forces exerted on the tip float. plane but also contribute a great deal to poop to break the water's surface. Eight Wind about 250 turns for initial test. If the structural integrity of the wings. strands seems to be adequate if flying a deep grass area is convenient, make Simply stitch the wires in place with a conditions are ideal, this being a slight hand-launched tests, checking for flight fine sewing needle drawn through the breeze and some slight wave action. The trim. On rise-off-water flights, try letting hollow straws and wing tissue. Apply idea with a single float model is to get it the wind come about 10 degrees off the Hot Stuff sparingly at intersections. in the air fast, before a tip float has time starboard (right) side when launching. FLYING to cause excessive water drag and slew Slight adjustment of the aluminum Balance model as shown on plans. the plane around. Some modelers have water rudder may be needed for water

HB-ENGINI Made in W.Germany PERFORMANCE · PRECISION · POWER DESIGNED AND MANUFACTURED TO MEET THE HIGH PERFORMANCE DEMANDS OF TOMORROW’S COMPETITION-TODAY! HB.21 PDP* (3.5 ccm) The HB-CAR ENGINE is an engine with •Perry Directional Porting one purpose in mind...TO WIN AUTO RACES! This is not an aircraft engine that was modified for cars, but a car engine intended only for cars.

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86 R/C MODEL BUILDER control. with transparent red and white Super well those models fly. The Shuttle and The Curtiss 18-T-1 is an unusual sub­ Monokote (or “ Moneykote,” as my dad Legionair sailplanes are produced by ject, and provides a challenge to the calls it). I decided on a simple color Legionair Sailplanes, 3017 Norwood, more experienced builder. · scheme, because I was using only two Arlington, TX 76013. · colors and the black trim would be just enough to set it off. I imagine a lot of H alt-A ...... Continued from page 46 Shuttle...... Continued from page 21 crazy things could be done with Mono- to the flexing of the wings. The 1/4 by kote on this airplane. even clean up those 4-point rolls 1/8 leading edge strip is put in, then FLYING AND TRIMMING dunno fer sure. there is the 3-inch top leading edge Before we first flew the Shuttle we So look at the picture. The tips are sheeting and 1-inch top trailing edge made sure we had all the rudder throw swept front inward about 5° and are 30° with 1/4-inch cap strips. Make sure the we could get, because we weren’t sure off vertical. They look very fast and sexy, root rib is properly angled for dihedral how the wide area of the fuselage would which is all they were supposed to do and positioned so that 1/8-inch of the affect the rudder on the first flight. The originally. Who knows, they might even aluminum tube is protruding at the root. Shuttle required quite a bit of left rudder work to help spiral stability on a free This excess is for the 1/8 ply root rib. The trim, which was corrected at home by flight. bottom of the wing panel is the same, putting more washout in the left wing. except that both the leading and trailing Other than that, the Shuttle flew like a BEGINNER’S WORKBENCH edge sheeting is 1-inch wide. The 1/8 ply dream. It seemed to fly like it was on Plastic film coverings: blessing or root ribs should be glued in after both rails: just a very groovy airplane. It does curse? Well, friends, I’ve found them to panels are finished and the1/16sheeting beautiful loops, doesn't roll very well, be, by far, my finishing method of trimmed flush with the ply rib. All that is and I couldn’t get it to spin at all. choice. I do 99% of my models with left now is to build the tips, which are cut plastic films even though I own a com­ However, with a straight wing and plete spray outfit with three sizes of on the plans. To join the wings to the ailerons, I bet it would do all kinds of fuselage, add the 1/8 dowel index pins guns. aerobatics. We were right about the On the good side, of course, there is and make sure the incidence of both amount of rudder it takes to turn this wing panels is the same and that the the fact that you have a one-step finish. machine, especially when it’s slowed Film covering is very fast compared to bottoms of the wings are parallel to the down on landings. I haven't tried to stabilizer. any paint finish I’ve seen. In addition. I thermal the Shuttle, due to a lack of find it much easier to get a top-notch EMPENNAGE flying sites where I live. But the Shuttle finish with film than with paint. It is The stab and rudder are 1/8sheet, but was primarily designed asa thermal ship. could be changed to 3/16 sheet. This surely a matter of practice, but there it is might be a good idea, especially if you Price of the 78-inch Shuttle is $56.00. anyway. are in the habit of cartwheeling your The airplane is also available with 100 On the bad side are several factors. planes on landing, or folding car seats on and 132-inch wings, at $66.00 and $78.00 First is cost: those film rolls ain’t cheap! long skinny stabs. respectively. These two larger models Second, not all films are appropriate for FINISHING use the same wings as the Legionair 100 all covering tasks (more on this later). The finished product was covered and 132, and most everyone knows how Third, you can’t get entirely away from NOVEMBER 1979 87 building, lack of fumes and clean-up, tips, cowls, around surface edges, etc. reduced sanding (ugh, physical effort!), without wrinkles if you have faith and and ease of repair (who, me crash?) courage. Pull in some areas, let it shrink more than outweigh the disadvantages. in others. Remember that these films For the beginner, much of the same sort can stretch as well as shrink. of considerations hold true. Learn to fly • I usually give the nose area of a power first, then build that super model later. model a coat of epoxy before covering, Time is definitely more than money; you then I epoxy the engine compartment can't usually buy time, and I, for one, including the film edges again after MODEL SUPPLY never have enough. covering. If you want your model to How, then, do you do a good, long- really last, paint all the edges of your lasting job of finishing with plastic films? "Y o u r Supplier, seams with clear epoxy everywhere that There is really only one way to learn, and fuel or oil might reach. Not Your Competitor" that is to do lots of models. I can, • All films are paintable, but for reason­ • Stocking over 150 however, offer some hints and tips to able adhesion, use very fine steel wool improve what you are doing; lines of merchandise on the surface first. • Definitely get a sealing iron specifi­ • If you want to mate paint and film, as • Fast service to all parts cally designed for plastic film covering. of the USA and also on on. say, a fuselage and stabilizer or The handle, small shoe, variable tem­ rudder, paint first, then film cover over foreign orders perature, shoe shape, teflon coating, it. Use trim tape to hide the seams if the • Special cash discounts and weight all make your job easier. color match isn’t perfect. up to 10% • Take your brand new iron and sand • When you are using two colors of the teflon surface very gently with 600 covering, do the lighter one first. The • Freight allowances up to 5% grit wet-or-dry paper. The teflon is • New Golden Dealer program dark one would show through. sprayed on and tends to have bumpsand • Cover the bottom surfaces first if • Weekly mailer spikes. Don’t be too concerned if a few possible; your seams will end up on the • Phone orders encouraged specks of metal show through when you bottom of the leading and trailing edges are finished, the finish will retain ade­ that way. quate non-stick characteristics. DEALERS ONLY • Try for at least 1/8 to 1/4 inch overlap CALL US AT 312-759-1955 • There are differences in the working to avoid bare wood showing up when characteristics of different brands of you heat shrink the film. MW 7791 films. Some are ideal for covering direct­ • Seal the edges well with firm iron MIDWEST MODEL I ly over foam, but won’t hold dimen­ pressure, then keep heat away from the sional stability. Others work at too hot a seams while shrinking the film. W M X i A ' l i *A*t ■ m '« ii temperature to do foam, but can hold • I like to use a thin strip at all fuselage/ dimension well enough to stabilize an surface right-angle joints. You need not ,1 M /./ MV#· mwr.LDiSTMHVTOH open structure. For example, Super try to do a perfect match of fuselage and S E R F IM . H E iL E R S FO K (H F.R 30 YE IR Ss ) Monokote will stabilize an open struc­ surface films then. ture beautifully, but you would have a • Co over your model and heat shrink paints on an engine powered model if terrible time doing an unsheeted foam the film twice. You will find that there you want it to last for a while. Finally, wing. Econokote, also from Top Flite, are residual stresses set up the first time there is appearance. A plastic film finish works much cooler, but doesn’t have which could cause wrinkles later. is judged by some people to be too the dimensional stability; it is more • On a lightweight structure, flat-bot­ shiny. A painted, rubbed and waxed flexible and creep prone, so you even­ tomed airfoil, shrink the bottom surface finish has a very special look . . . a gloss tually get warps and wridkles. The two first, then pin it down to a flat board and rather than shine. It is like the difference types of film are both good, it is just a shrink the top. You avoid warps this way. between well-used and polished sterling matter of selecting the material which is • For extra strength, use a tissue or soft silver and shiny new stainless steel. best for your task. cloth to rub the heated covering into a All of that aside as background, I like • Don’t be afraid to pull hard on the film firm bond with balsa structure. Work the plastics for my purposes. The quick while heating it. You can go over wing your way from one end of the model to ♦ ♦★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★i** + * * NEW MATH? 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88 R/C MODEL BUILDER WE, THE PEOPLE OF THE j UNITED STATES, IN ORDER TO { FORM A HORE PERFECT DEALER INQUIRIES INVITED ZAP j å p V y REVOLUTIONARY SUPER GLUE 7 SUPER STRONG . . . SUPER FAST. . . i / i r T T i n ADHESIVE SUPER CLEAN AND EASY TO USE! Λ μ/Ě ě i f w ' DIVISION The precision adhesive for PACER TECHNOLOGY & RESEARCH · Modelers · RC Automobiles 1600 Dell Avenue · RC Aircraft · Miniatures Campbell, California 95008 · RC Boats · Hobbies (408) 379-9701 Gef revolutionary SUPER ZAP at your hobby dealers. the other. If necessary, you can use a pin the field to the can. Let’s not pass middle of the flight. to puncture any air bubbles. judgment, however, until we have had a 17) He said he grabbed the wrong • Plan your decoration scheme before chance to check over the list. For the fun clip, the wrong radio, or just wasn’t you start covering. of it, put a check mark by those excuses thinking and turned on, all I know is the • Use a hot-air gun for shrinking, you you know took place because the source plane is in pieces. just can’t do as good a job with an iron. was reliable or you saw it happen. To 18) I got glitched! Hair dryers don’t work for this. make things more interesting, put a 19) I must have got too close to his I hope some of the above will prove double check mark by those excuses transmitter, he just swamped me. useful. If you have other hints you use, you have had to use because it actually 20) I thought I was right side up! please share them. We all keep learning happened. NEW Q-M KITS together. · 1) The needle valve was set too lean The stagnation in Q-M aircraft design and the engine died. may finally be over. Two recent addi­ Pylon...... Continued from page 20 2) There was too much vibration so tions of competitive aircraft kits are now the mounting screws came out. available or will be by the time you read available for release. See you at the 3) The prop nut came off and threw this. races, Art.’’ the prop. First up is the Midget Mustang being No sooner said than done. Art. An 4) Vibration caused the muffler to fall produced as a basic kit by )im DeYoung, NMPRA membership blank is included off the engine. 15958 Parkside, South Holland, Illinois. in this issue, somewhere in the back of 5) The engine just quit. The kit consists of a polyester glass the magazine. 6) I forgot to fuel up. fuselage, cheek cowl, and belly pan, From the Windy City Newsletter, of 7) The hinge pin must have fallen out. along with foam wing cores. the Chicagoland Radio Control Model­ 8) The wind just picked up the wing Fiberglass quality was about average, ers, comes the following tidbits of Food tip and it was too late. except for excessive pin holes in the for Thought. While it is aimed at the 9) All of a sudden the wing just removable cheek cowl; the foam cores general modeler, I bet that at any given folded. were cut straight and accurately. The race you can hear at least one of these 10) I forgot to put on the rest of the fuse and cowl weigh 5.5 ounces, which is excuses during the day. Thoughts are rubber bands. an acceptable and obtainable weight courtesy of Bob Berkley. 11) The nylon clevis wore out and while allowing adequate structural BRAIN MEAL (FOOD FOR THOUGHT) broke off. strength. Below is listed a number of excuses 12) I forgot to extend the transmitter The plans are slightly better than used by our fellow flying buddies on antenna all the way. normal with regard to materials used by those occasions when they must take a 13) I forgot to put the servo screw the designer. No written instructions long walk into the giggle grass, through back in. (i.e., step-by-step) are supplied, as it is the forest, or even to the parking lot. 14) I forgot to plug in the aileron assumed that only experienced builders Some of these retrievals are for planes servo. will attempt to construct such a spe­ still intact with nothing other than a bent 15) The servo just went crazy. It cialized aircraft. nose gear or a jostled wing. But others wouldn’t center or anything. The kit we constructed for this mini­ are simply the transport of garbage from 16) The battery just failed in the review was set up for a Rossi .15; a High NOVEMBER 1979 89 Embryo-Rubber Airborne batteries: GE 225-mil pack disagreeable thing I found with the This airborne flight pack results in a Midget Mustang was that the removable lightweight, smooth operating and cheek cowl fit poorly and too closely to dependable system. the engine. In order to have a smooth Interior fuselage space is sufficient to flowing fuel line and to eliminate the place the system far enough forward to possibility of collapsing the fuel line compensate for a slight tail-heavy condi­ between the cowl and a hot engine, I left tion, should careless building habits the cowling off. prevail. Our completed airplane bal­ The second kit to report on this month $4.75 anced right on the C.G. with no addi­ is like the proverbial promise. Recently tional weight having to be added and announced for sale by D&L Model Featuring the JETCO-MATIC wing-*»ob building weighed exactly 2-1/2 pounds less fuel. Products, 1141 Columbus Ave., Le- jig. Eo*y 2-nite construction. Dstbemtaliser equipped. “ If you con m a k e t h e AM A D e lt o - D o n A 3-oz. tank was fabricated from a moyne, PA 17043, they haveexperienced common plastic bottle in an effort to par some production problems which has I S·· »Oiif O#ol*r first. Direct orden r . T . i η λ ·)Εα I 1 pUo·· odd SI.00 for pocking. CATALOG .25* | off unnecessary flying weight. resulted in a bacidog of orders. The TEST FLYING manufacturers just recently assured this A. ZAIC CO., INC. 883 LEXINGTON AVE No control surface movements were writer that the problems have been 4 å B ^ BROOKLYN N Y 11221 specified on the plans, so going by past overcome and that the kits will be expei ience the review kit was set up as available shortly, if not already by the Point Model Products raked forward follows: ailerons 1/8 inch up and down; time you read this, assuming that you are landing gear was used. The wing was elevators 5/16 inch up and down; and reading this. covered and trimmed with Monokote, rudder 1/2 inch each side of neutral. What's the kit? Why, the old favorite and the tail surfaces were covered with Flying characteristics are very good; updated to today’s current state of the 3/4 oz. K&B fiberglass cloth and poly­ the Midget Mustang went exactly where art: RIVETS! ester resin prior to priming with K&B it was guided, control through full speed Right about now you’re thinking of all Primer and final painting with DuPont No. 1 pylon turns produced no bad the tales you’ve heard about this air­ “ Imron.’’ faults, such as tucking the nose down. plane snap-rolling and falling out of the The rate of roll was satisfactory and the sky when being pulled hard around the A Super Tigre aluminum motor mount pylons. DON’T ALLOW YOURSELF TO was modified to accept the Rossi engine airplane was stable through all flight modes from full power to dead-stick BELIEVE THOSE OLD PILOTWIVES’ and proved to be more than adequate TALES. They just aren’t true; in fact, if and adaptable for the job. landings. The aircraft is currently being used by you’ll talk with a knowledgeable aero­ A potpourri of radio equipment myself as my back-up ship, solely be­ dynamics expert, he’ll tell you that the selected to conform to my standards of cause I've become so used to flying my Rivets wing planform is one of the most quality resulted in thefollowingchoices: primary aircraft, which in itself is un­ efficient for racing purposes. Transmitter: Proline 5-Channel usual as they don't usually last so long. Besides, try telling some of those Air Receiver: Ace single deck (Just kidding ... I said that so you Force pilots that their aircraft aren’t safe Servos: Futaba S-20 "crashers" wouldn’t feel bad.) The only because the wings are swept back. Enough conjecture. I’ve seen theaircraft race in the hands of Gail Jacobson and Dave Latsha and can attest to its compe­ titiveness and smooth flying characteris­ tics. The plane in the hands of these two pilots has already racked up a number of impressive placings and set some very fast times. Our order is in for one, and as soon as we get it and have it flying you’ll get a first-hand report on it. * * * P.S. I just received the following contest announcement through Walt Schroder (sent to him by Lars Giertz), and it sure looks interesting; enough so that it might even be worth taking up Q-500. With 1000 bucks up front, they're sure to reach the maximum number of entries rapidly, so if you want to compete you’d HRE chassis kits are aerospace quality with aluminum better get yours in. parts anodized. They also have: ALUMINUM FRONT AXLE, Just one note to Lars: get your biggest, DISC BRAKES for consistent braking, AERODYNAMIC strongest, smartest worker for the C.D.’s WING for lowest drag, BALL or ROLLER BEARING and/or Starters job, then back himtothe fullest! Money tends to bring out some CLUTCH for trouble-free operation, NYLON SPOKED of the worst characteristics of anybody. WHEELS for appearance and life, POWER ADJUSTABLE “ Dear Walt, REAR END, an HRE exclusive. I wanted you to be the first to get the M chassis kits fo r K&B 3.5cc engine have an 8mm information on the upcoming National TITANIUM REAR AXLE; more strength, less weight. Q-500 Pylon Racing Championships. The event is hosted by the Manned Other HRE exclusives are; AIR PUMP FLYWHEELS, Space Center Radio Control Club at FRONT and REAR ROLL SUSPENSION kits, TECH NASA here in Houston, and organized MEMOS. by the Houston Area Pylon Racing Association. The date will be November SEND 20d (stamps OK) FOR BROCHURE 3 and 4 this year. “ Since the AMA in its great wisdom HRE, 18276 Foxglove Way, Irvine, California 92715 refuses for one reason or another to

90 R/C MODEL BUILDER recognize Q-500 as an official class in spite of its widespread popularity, and ENGLAND'S FINEST for since the class therefore is not flown at AMERICAN MODELERS the regular AMA Nats, we decided to take the bull by the horn and stage the fro m Q-500 Nats ourselves. "We already have acquired $1000 in cash for prizes, and the merchandise commitments are coming in with amaz­ ing generosity. K&B is sending engines, George Aldrich is furnishing fuel, etc. CESSNA "I am enclosing a set of aircraft rules. $56.95 These are the same rules that we race under here in the Southwest, and they have proven to be very workable and easily enforced. Of course, there are slightly different rules being flown in other parts of the country, so we need to publicize the official Q-500 Nats rules as quickly as possible to allow all competi­ tors to optimize his set-up. 1/8-Scale "We are scheduling two days of 55" Span competition with a list of 80 entries on a #MA-202 first-enter, first-served basis. All-wood kit. Much pre-sawing and diecutting. “ Currently, the popular engines for Formed gear, mount, some hardware. Q-500 are the K&B.40(No. 8011),COMO .40, and HB .40 PDP, all pretty much evenly matched when properly handled. The top pilots around here are capable of turning the course (2-mile Q-M) in HANSEAT the low 1:30’s. $149.95 "Anyone interested in the event can write for a complete info packet from Scale offshore HAPRA, 6400 Westpark, Suite 490, Hous­ cruiser ton, TX 77057, or call me at (713) 781 -9676 #MA-110 or (713) 723-6463. Best personal regards, Lars Giertz.” 51" long, 1/16 scale. Fiberglass hull, diecut HOUSTON MINIATURE PYLON and sawed superstructure. For electric or gas R/C. RACING ASSOCIATION 1979 Q-500 PYLON RACING AIRPLANE RULES AERONCA GENERAL: CHAMPION The airplane must be of common $164.95 configuration, i.e. with a forward wing and aft empennage. Engine and engine 1/4-Scale mount must be fully exposed. 105" Span WING #MA-204 Minimum area 500 sq. in. Minimum span 50 in. Minimum thickness 1.2 in. The outer one inch of wing may be tapered. The wing must have constant Includes motor mount, tank, and much hardware. A ll chord, no sweep or taper. Wingspan MORE COMING!! wood costruction, with die­ measured from tip to tip along the AVAILABLE FROM MANY LOCAL HOBBY DEALERS cutting and sawing. For .60 bottom of wing. or Direct (outside California) if your dealer doesn't stock. and larger engines. STAB Add 5% handling and U.P. charge. No C.O.D. please. Minimum thickness 3/16 in. FUSELAGE California Hobby Dist. (Since 1935), 415 S. Palm Ave., Alhambra, CA 91803 Measurements in front of wing: min. height 3 in., min. width 2-3/4 in. Op­ have spinner or safety nut. Local field FUEL tional canopy not included in above rules may require mufflers. 15% nitro, furnished by organizers. measurements. No wing fillets. All cross WEIGHT COURSE AND RACE PROCEDURE sections must be square or rectangular Minimum 3-1/2 lbs. at landing. As specified by organizers. · and corners may be radiused no more FUEL SYSTEM than 1/4 in. Fuel Lines.... Continued from page 19 LANDING GEAR The fuel tank must be transparent and Main gear must be fixed and have two may contain no baffles or sponge mater­ use someone else’s property are infi­ fully-exposed wheels of min. 2-1/4 in. ial. Crankcase or muffler pressurization nitely greater if you show them your diameter, spaced at least 4 in. apart of the tank vent is allowed. Devices that relatively small models. laterally. modify the fuel flow between tank and OK, now that I have you just about ENGINES carburetor are prohibited. The fuselage convinced that a modest size model is Any stock, non-ABC, non-Schneurle, must have a readily removable hatch very practical, let’s talk a bit about some front intake, side exhaust R/C engine up that allows easy inspection of the fuel engines and fuel, etc. If you’ve been to 6.6cc manufactured in numbers system. reading this column for any length of exceeding 500. Only modifications PROPS time, you know I have a high regard for allowed: removal of exhaust baffles, Any commercial, readily available, the Cox T.D. .049 and .051. They’re great removal of factory installed shims be­ two-bladed wood prop. Material may be engines, and the $24.95 price is quite tween head and sleeve. Prop shafts must removed from one blade only. reasonable by today’s standards. If you

NOVEMBER 1979 91 want a little more displacement and Both engines come equipped with weight. (I'm experimenting with hand- power, try a T.D. .09 at $26.95. How mufflers, and both feature Schneurle molded paper mache' rubber band about throttled engines in these dis­ porting. In future columns, we’ll give models now.) placements? They are available from you a more detailed review of these two "Plans are available for the basic custom tuners, but if you don't want to as well as the R/C Bee. For the present, model (at $3 a copy) from me at 3724 go that route, you can use a Medallion suffice it to say that they are well John L. Ave., Kingman, AZ 86401, al­ .049 R/C at $18.95, or a Medallion .09 designed and manufactured. Their per­ though I haven’t drawn up a conversion R/C for $22.95. They have a little less formance will amaze you, and the price sheet yet . . . but could do so if re­ power, but they are certainly adequate. is reasonable. How about operating quested. In fact, there are a number of costs? Well, how does six to eight hours old gas models that would convert into Further, by the time you read this, a new gliders very nicely . . . and they have Cox engine should be available. It’s of engine operation per gallon sound? Not bad at all. plenty of designed-in strength .. . like called the .049 R/C Bee. According to the Skylark, Soaring Eagle, and so forth.” Cox, it is “ A completely new engine I may or may not have convinced you to give small displacement modeling a Gordon then went on to describe other designed for the requirements of R/C items of more specialized interest. He flying, featuring a smooth proportional try, but you can't deny that I made a good case for helping to keep the notes that he invented a “ split tee” tail throttle with a quiet factory installed design back in 1952-53 while stationed in muffler, plus a new larger capacity tank Society for Prevention of Cruelty to Animals away from your doorstep for England. Interesting! incorporating a weighted fuel pick-up In the past, those concerned with R/C for extended inverted flight. The R/C starving a Great Dane. One parting thought. With the unavailability of Rossi scale have continued to seek greater and Bee features rear rotor induction for greater fidelity . . . all the way down to higher power than our popular reed .15’s and the demise of the Cox Con­ quest .15, do you think somebody might pointers on the instrument panel and a valve engines, and provides other im­ miniature pilot staring blindly at those portant features. The engine can’t run get the idea of putting an O.S. .10 or X-11 in an existing quarter midget? · instruments. All that’s static fidelity . . . backwards, is not sensitive to contami­ a detailed simulation of the appearance nation from dirty flying sites, and is of the full-scale counterpart. But what easier to start and adjust.” The retail Soaring...... Continued from page 31 about the fidelity of dynamic simula­ price will be $19.95. tion? Does the model adequately simu­ At this point, you may still be a little Here’s a ‘natural’ design for a large late the full-scale airborne performance? reluctant. It’s probably a visceral feeling soaring machine. We have hard rock How do the cruise speeds compare in that you’d like something a little more hills here and soft models don’t last long, terms of number of fuselage lengths substantial with an honest-to-goodness so we use hardwood and plywood on traversed per second? The full-scale throttled carburetor rather than an the big models (we also build some 1/4- Libelle cruises at about 60 knots; that is, exhaust baffle. Want no longer. Asthis is scale stuff and I have a couple of half­ about 5 lengths per second. How fast being written (July), there are two scale items in the framework stage now). does your 1/5-scale Libelle fly in lengths superb small engines on the market: the It might be possible to build the Cavalier per second? O.S. Max .10 FSR R/C, $38, and the just- from foam-and-balsa sheet or molded And what about flight efficiency? The released Super Tigre X-11 R/C, $37.95. something-or-other for even lighter full-scale Libelle can exhibit 'a lift-to- drag ratio of almost 40:1. How close can your model come to such high quality performance? What about the dynamic stability and general handling quality of the aircraft? The HP-18 was primarily designed to win contests. Ease of han­ dling was a secondary consideration. How easy is it to control your R/C scale model of that plane? Can we develop meaningful measures of handling qual­ ity in terms of spiral stability, phugoid -NEW- amplitude, dutch roll tendency, and HEAVY DUTY ELECTRIC RETRACTS other characteristics? • LIFTS A 4" WHEEL ON A ΐσ* STRUT (Center To Center) Are we ready to recognize that R/C • H E A V Y -D U T Y S L IP C LU TC H . P R E V E N T S JAM M ING scale models are indeed simulators of • LARGE TRANSMISSION GEARS their full-scale counterparts? Can we • 3/16*' W IR E S T R U TS introduce scoring that reflects the • W ILL HANDLE WEIGHT OF AN 11 TO 20 lb. AIRPLANE significant aspects of dynamic perfor­ • SLOW. SCALE TRANSIT TIME. 5 SECONDS • POSITIVE MECHANICAL UP AND DOWN LOCKS mance in addition to the static appear­ ance of these superb simulations? GMP-230 Three^ear s e t ...... $ 1 1 0 .0 0 And if you're really competitive, you'll G M P 2 3 1 Tw o gear s e t ...... $ 7 9 .9 5 G M P-232 N o se gear o n ly ...... $ 3 6 .0 0 certainly want to read Air Facts and Feats, one of the-Guinness family of books published by Bantam Books, New York, 1979 ($6.95). Here are all the -NEW- records over all the years . . . from GIEZENDANNER SOLID STATĚ AMPLIFIER ISWITCHI conventional to curious. Who knows,

• LATEST 1C SOLID STATE CIRCUITRY you might come up with a way to "do • ALLOWS USE OF SEPARATE BATTERY SUPPLY your own thing” and get into the next • ELIMINATES ADDITIONAL SERVO. SWITCH. OR edition. HARDWARE • PLUGS DIRECTLY INTO RECEIVER AUX. CHANNEL See you next month. · • CAN BE ORDERED FOR POSITIVE OR NEGATIVE P U LSE IN PU T S YSTEM S • CAN BE USED AS A GENERAL PURPOSE ELECTRONIC Power Boats.. Continued from page 49 SWITCH FOR LIGHTS. ETC. • NO R F IN T E R F E R E N C E • ONE-AMPERE SWITCHING CAPABILITY his Gator 40 and Wing Ding 60 to take • SMALL SIZE (1-9/16 « 1-3/16 * 15/16 inchcil these respective classes. Second place in WRITE FOR COMPLETE RETRACT. COMPONENT. • LIGHT WEIGHT (LESS THAN 1 OZ.I both classes belonged to Randy Seiser's AND PRODUCT INFORMATION $34.95 Pennsylvania residents add 6% state sales tax. 40 and 60 Gators. Both Ron and Randy Y ES. we HA V E GIEZENDANNER WIPERS used K&B 7.5’s in the .40 hydroplane class and OPS ,65’s in the .60 hydro class.

92 R/C MODEL BUILDER THE ULTIMATE IN RC FLYING FOX 20CC OPPOSED TWIN

The Fox Twin is the finest two cylinder model airplane motor ever twins, where a single carburetor would result in one cylinder running produced. Every design consideration and manufacturing care has rich and the other lean. Although the Fox Twin can turn a 17,18 or 19 been taken to make the Fox Twin a really practical power plant. inch propeller faster than most chain saw engines of equal displace­ The two cylinder opposed simultaneous firing configuration was ment, its true potential is achieved by letting it rev up. The result is the selected because equal and opposite piston motions cancel each ability to fly your airplane in a realistic manner, using a scale type pro­ other out vibration wise and produces a smoother running configura­ peller, but if you are performance minded, then put on a smaller pro­ tion than the alternate firing in line motor. In addition, the opposed peller and really move out. We recommend a 15-6 for average models. cylinder configuration cools better and fits most scale models better. Each Fox Twin is factory run at full power, assuring you that when The cylinder configuration is of the most modem and advanced you buy this and put it in your model, you can fly. The carburetor has schneurle porting, featuring Fox exclusive angle side flow bypasses. been adjusted and synchronized for atmospheric conditions at the The cylinder is glass hard and the pistons are factory. Unless you are at a rather high al­ made of the hardest piston alloy available. titude, no further adjustments should be The crankshaft is of hardened steel, and ex­ necessary. tremely massive compared to any other motor you have seen. The massive TWIN Fox Twin ...... 4250.00 crankshaft construction was necessary be­ SPECIFICATIONS: cause the terrific power of earlier experimen­ B o re...... 907 S tro k e ...... 937 tal cranks twisted in two for conventionally H.P. (at 14,000 R P M )...... 3 plus proportioned shafts. The dual carburetion FOX Weight ...... 2* 8oz. makes possible adjusting each cylinder for MANUFACTURING CO. 5305 TOWSON AVE FORT SMITH. ARK 72901 Standard accessories: Firewall type motor maximum power, a failing of most earlier PHONE 501-6A6-1656 mount, carburetor Interlink, fuel line "Y" fitting.

For More Information · Call: 1-501-646-1656. A MONO 3) Don Nauditt...... 900 1) Ron Erickson...... *1819 4) Bob Hartsock...... 554 ANNOUNCING 2) Dave Austin...... 1419 5) Bill Smiley...... 450 Fatt Stttp Climb FLat Slow Gild· 3) Dave Blacksten...... 1054 A OUTBOARD TUNNEL ^ 4) Dunlap & Son R / T ...... 1025 1) Dennis Caines...... **2194 5) Don Nauditt...... 825 2) Mike Wight...... *1516 ♦Clinched at least a tie for District High 3) Leo D reith ...... 1054 4) Larry Knudson...... 869 For tha new P 30 claee Points. hart it a modal daaignad w ith^ < ^ ^ V B MONO 5) Bill Am ick...... 691 tha novic· In mind and has the -v ----- \ potential to win In tha toughest compwrttiotr 1) Bill Hornell...... 1600 ♦‘Clinched District High Points. 2) Ron Erickson...... 1556 ♦Clinched 2nd in the class. THE POT ENT·· 30 3) David Jensen...... 1463 YOUR BOATING EDITOR HAS A Dalaxa kit features include 4) Vic Roberts ...... 1140 CHANGE OF ADDRESS Rolled balsa fuselage and wing mount with d* 5) Doug Sm ith...... 958 The Dunlap family made a change of Completed prop and nose plug tail plug A rudder Precut wing ribs spar notches Job rated balsa strips B DEEP VEE residence in August. The new address is Highest quality tissue lubed Contest rubber Detailed instructions flying tips to help you winl 1) Ron Erickson...... 1950 119 Crestwood Dr. SW, Tacoma, WA CAT NO R2 $0 05 PLUS *1.00 PAP 2) Bill Hornell...... 1900 98498. This boating section continues to check or money order to CHA& WERLE 3) Vic Roberts ...... 1269 reflect pretty much the activities of 3020 MORSE AVE NO 8 SACTO CALIF. 05821 4) Doug Sm ith...... 884 model boaters in the Northwest because 5) Jerry Dunlap ...... 761 no one has taken the time to send in Third place in the .40 class went to Gary A HYDRO results, photos, or comments. To en­ )ensen, and Bill Smiley took third in the 1) John Moss ...... *2300 courage readers to send me informa­ .60 class. Although not eligible for 2) Jerry Dunlap ...... 944 tion, I’m able to offer a limited number district points, Frank Ward and Bill 2) Jack Peters...... 944 of one-year free subscriptions to R/C Hornell ran their X hydros against the 3) Randy Seiser ...... 922 Model Builder to individuals providing .60 hydros. Bill was successful in lower­ 4) Doug Sm ith...... 821 photos and write-ups that can be used in ing the NAMBA Scale Hydro record to 5) Bob Hartsock...... 619 this column. People enjoy seeing their 1:23.3 with his twin K&B 7.5 Thriftway ♦Clinched District High Points in class. photos and names in model publica­ Too. Frank’s original hydroplane used a B HYDRO tions. So make yourself a hero among Rossi .60 and made several runs around 1) Ron Erickson...... *1750 your local boating friends and send in the five-lap course at 1:25. This was 2) Randy Seiser...... 1350 some photos and race results. I’ll also be Frank’s first race in the large hydroplane 3) Doug Sm ith...... 873 glad to answer questions and would class in four years. It looks like the fellow 4) Stan Hoagland...... 807 enjoy hearing comments about material who developed the Drag N’ Fli hydro­ 5) Vic Drew...... 776 presented in this column. Let me hear planes and Wardcraft Vee has another ♦Clinched at least a tie for District High from you. · winner in his outrigger/canard design. Points. C HYDRO Hannan...... Continued from page 54 The District 8 standings with only one 1) Ron Erickson...... 1792 race remaining are as follows: 2) Randy Seiser ...... 1700 timers,” I predict a stubborn resistance to change. Personal hang-ups aside, this book is highly recommended to anyone A HOBBYPOXY HOW-TO: interested in internal combustion en­ gines. Atheneum of New York is the publisher. PREPARING WOOD FOR PAINT COLONEL THACKER SEZ: “ I don’t like to repair a model. . .Ijust The Key to a good paint job is The secret to grain filling is not like to build it, taxi it out, fly it, land it, proper preparation. All surfaces how much filler you put on. but and be told how wonderful I am!” must be smooth and clean. how much you sand off. Generally Let's look at smooth first Wood speaking, you should sand the SATURDAY NIGHT FLIER has gram, and sometimes nicks first couple of coats right down Pat Curtiss favored us with a clipping and dents, and maybe knots and to the bare wood. This leaves the from the New York Times, which indi­ worm holes. For filling it's best to filler only in the low spots — cates what the Russian press thinks of select a material that's just slight­ which is precisely what you want. our hobby. Seems Yuri Borovoi of the ly softer than the wood itself. That Follow this with one more coat, way. you can sand the filler sanded smooth, and you should Literaturna Cazeta had this to say in his smooth without digging ditches in be ready for the top coat. review about American film star John the surrounding surface First seal Now to the clean part Before Travolta, declaring him to be washed-up the wood with a coat of Hobby- you paint you should remove all as an actor: “ Only one joy is left to him poxy Clear. Let it dry. Fill any dust, oily fingerprints and other . . . the childish habit of gluing together dents with Hobbypoxy Stuff bad things from the surface. A straight out of the can. let it dry. careful vacuuming, followed by a brightly colored model airplanes.” then sand it smooth For grain gentle wipe-down with cheese­ TALL IN THE COCKPIT filling I recommend Stuff, Hobby­ cloth dampened with thinner will Orange County Airport (near Los poxy Filler, or Hobbypoxy Under- do the job nicely. Don't use paper Angeles) has been renamed John Wayne coater White. Stuff, thinned to towels—they leave lint. Once it's Airport, in honor of the late actor. brushing consistency with Hobby­ clean, avoid handling the model Wayne had played a number of aviator poxy Thinner, goes on easy, sands too much. Now paint, using easy, and fills fast. But it's pretty Hobbypoxy (preferably) or any roles during the course of his career, soft Filler isa little harder to other product All Hobbypoxy filler perhaps the best remembered of which sand, but results in a harder sur­ materials, once completely dry or was in "The High and the Mighty.” face. Undercoater White is a true cured, are compatible with dope, Ironically, he reportedly had once two-part epoxy and gives the best epoxy, enamel and other model signed a petition opposing the noise at results, but takes more time. paints. the airport which now bears his name. Stuff and Filler are perfect for For more info send for a free balsa models, while Undercoater copy of "Poxy Painting Pointers" ANOTHER NEW AVIATION MUSEUM While works great on plywood. Jc*\v\ E . Fbxy We are always pleased to see fresh interest in the preservation of aero history. Mik Mikkelson brought to our A Division of Pettit Paint Co., Inc. attention the recent opening of the HOBBYPOXY PROOUCTS 20 Pine Street. Rockaway, N.J. 07866 Donald Douglas Museum and Library, located at Santa Monica Airport in

94 R/C MODEL BUILDER Southern California. A non-profit cor­ Russ Barrera: "I guess when all is said poration, the museum is devoted to all and done, when the last moment comes, phases of aeronautics and space but it is not the review of the life’s past that concentrates at present on subjects we go through, but a judgment on relevant to Douglas Aircraft Company. ourselves. Did we deserve to live? I went Manned by volunteers, the current through this once when we were going hours vary somewhat, so it might be best through the Strait of Gibraltar in an 1/12 SCALE R/C to phone before planning a visit. More 8-knot convoy during 1944. We were volunteers are needed, both to serve as being bombed. The Liberty ship (carried ELECTRIC RACE museum hosts and to assist in the restor­ 3/8 shells) bunks were elbow high. No CARS AND ation of aircraft models. Could be fun as place to stand or be in a position to move well as useful! fast. So, I did not take advantage of the SCIENTIFIC AMERICAN Catholic last minute prayer, but simply ACCESSORIES The July 1979 issue of this magazine is a told myself that I had lived the way I must for anyone interested in Wright thought best. And somehow, just being THE ORIGINAL & brothers aircraft. Although there are a honest with myself, I felt I gained a notch few questionable statements in the text, upstairs. As you can see, the bombs STILL THE BEST the discussion is well presented and missed us.” gives an unusually clear understanding FOR THE BIRDS IN QUALITY AND of the development of the Wright From Aeronautics, 1893, by Octave gliders which preceded the more famous Chanute, this abstract: "The mechanical SELECTION powered "Flyer.” The illustrations are difficulties in obtaining safe support exceptionally well executed and clarify from so intangible a fluid as air are, the functioning of the control systems of however, so great that man would long these pioneer aircraft. Our thanks to ago have given up the attempt if it had Byron Whartnaby for bringing this not been for the birds. It is a mistake to magazine to our attention. suppose that the problem of aviation is a ESCAPE CLAUSE single problem. In point of fact, it Howard Johnson’s restaurant offered involves many problems, each to be a cardboard punch-out "Solar Explorer” separately solved, and these solutions model bearing this unusual bit of in­ then to be combined. These problems formation on one corner of the card: pertain to the motor, to the propelling "The Solar Explorer can fly only in outer instrument, to the form, extent, texture, space. If flown on earth it usually crashes. and construction of the sustaining • 10 Best Selling Bodies All litter and parts used in construction surfaces, to the maintenance of the of this craft should be carefully disposed equipoise, to the methods of getting of.” Sounds familiar, doesn’t it? underway, of steering the apparatus in JEWELS ON DISPLAY the air, and of alighting safely.” Renowned Cartiers of New York, on Eighty-six years later the problems the occasion of introducing a new sport remain exactly the same. wristwatch, sponsored an exhibition of SIGN-OFFS vintage aircraft from the Cole Palen It is surprising how many letters we collection. Ed Whitten and Bill Warner receive here at the hangar with sign-offs both sent us copies of the program, other than the usual "Sincerely yours.” which was quite a tidy presentation in its Perhaps the most popular among model own right, featuring photographs and builders has been the simple yet in­ 3-view drawings! The display was held in spired wish: "Thermals.” A new one to an armory, and Whitten had this descrip­ us appeared on a note from San Diego • 4 Electric Cars Less Radio tion to offer: "Exhibition was great! But Aerospace Museum curator Ed Leiser: • 4 Cars With Radio & Electronic a frustration, as your eyes couldn’t do "Mirth is King." Think about it. · *I Speed Controllers justice to all the planes in an hour or so! A few had modern engines, and a C/L ...... Continued from page 63 couple had very small props. Made me think of gas powered scale jo b s.. .over­ being first. What separates the "also powered with dinky (non-scale) props rans” from a winner is persistence and buzzing. The Spad, Albatross, and some determination. Every Olympic Cham­ others were original with original en­ pion has it. gines." Therefore, if a modeler persists long HOW’S THAT AGAIN? enough and has the determination to From a 1963 issue of The Aeroplane win, then he is not an expert, but instead and Commercial Aviation News, this a damn good modeler. abstract purportedly from the DC-3 Definition of an "expert": "ex" means passenger manual: "Don’t be alarmed if a has-been, such as ex-president or ex­ • 4 Race Car Chargers the weather is bad or if you hear strange champ. "Pert" means a drip . . . there­ • 2 Electronic Speed Controllers noisesorif theenginesquit. In theentire fore, an expert is somebody who is no history of aviation there is not a single longer a drip. • 5 Racing Motors reported case of any aircraft ever failing I will admit to having others occa­ to return to earth.” sionally refer to me as an expert (the last FROM THE HORSE’S MOUTH? time being about three years ago), but Distributed World Wide thru Hobby Shops. Maj. Gen. John L. Hines,Chief of Staff, never having claimed to be one, I guess I Send $1.00 for Complete Catalog. U.S. Army, quoted in 1925: ‘‘ In my won’t take offense .. or thank him, opinion, the airplane is never going to whichever action would be appropriate take the place of the cavalry. The cavalry for defining an expert. Drip, indeed... will always have to supplement the CL-RPM RACING NEWS 12702 NE 124th Street airplane with its reconnaissance.” One of the most enjoyable of the Kirkland Washinaton 98033 WORDS TO LIVE BY newsletters to monthly cross this desk is (206) 823-2303 Frank Zaic reflecting on the passing of the Racing News. Edited by Sherry and

NOVEMBER 1979 95 R/C MODEL BUILDER . —a i R/C MODEL BUILDER R/C MODEL BUILDER Ě Έ | I 1 I U W - ^ V - R/C MODEL BUILDER R/C MODEL BUILDER if JLJ Æ m J a L ^ L a J f R/C MODEL BUILDER (BUT STILL GOODIES!)

MOST BACK ISSUES OF "MODEL BUILDER" ARE STILL AVAILABLE, THOUGH SOME ARE IN SHORT SUPPLY. ORDER NOW, WHILE THEY LAST! PRICES VARY ACCORDING TO QUANTITY REMAINING IN STOCK. NOTE SPECIAL ANNIVERSARY PRICES LISTED BELOW! Apr. 75 2.001 I SPECIAL ! ! ! May 75 3.001 ) Jun. 75 1.2SI ) Put a check mark ( ) by the back issues you MODEL BUILDER MAGAZINE S Jul. 75 · 1.251 ) wish to order. Magazines will be mailed by Sec­ A NN / VERSA RY BA CK- ISSUE SALE ! I Aug. 7502.001 ) ond Class, postpaid. Foreign orders (except Sap. 75 01.251 ) Canada, Mexico, FPO, APO) add 304 Per copy. ANY ISSUE MARKED WITH "o " 75 Cents Oct. 75 01.251 ) Allow about four weeks for delivery. If United Nov. 7501.251 I Parcel Service (UPS) is desired, add 80^ mini­ ANY ISSUE MARKED WITH " · " 50 O n is Dec. 75 01.251 ) mum for up to two magazines, or add S04 plus Jan. 76 01.501 ) lOtf for each additional magazine on orders for Fab. 7601.501 I three or more. Send check or Money Order (no Nov. 71 S3.001 ) May 7 3 0 1 .0 0 1 ) Apr. 74 01.001 Mar. 76 01.501 I cash, please, and no C O D ’s). A facsimile of this Dk . 71 2.001 ) Jul. 73 «1.001 ) May 74 1.001 Apr. 7601.501 ) order form may be used. Aug. 7 3*1.001 I Jun. 7 4 · 1.001 ■ton. 72 01.001 I Jun. 76 01.501 ) Sap. 7 3 · 1.001 I Jul. 74 01.001 Jul. 76 01.501 I Nam·: ______f * . 7· »■—i i Oct. 7 3 · 1.001 I Aug. 74*1.001 MM 7 2 · 1.001 1 Aug. 76 through Nov. 7301.001 I S/O 74*1.001 June 78,1.501 ) Add rats' May 72 2.001 ) Oac. 7 3 « 1.001 ) Nov. 7401.001 Jim. 72 3.001 I July 78 Sold Out Oac. 74 01.001 'Aug. 78 to date JM. M ·.—♦ ♦ Jan. 74 01.001 ) City: ______State: Jan. 75 0 2.001 each 2.00 ( ) F/M 73 2.001 I Fab. 7 4 · 1.001 I Fab. 75 2.001 'N ov 78 Sold out >■—( > Mar. 7401.001 ) Mar. 75 2.001 PLEASE PRINT^ z i p : . M ODEL B U IL D E R . 621 Watt Nineteenth St., Coata Mm . Ca. 82627

Greg Holland, also known as Toodles either themselves or racing too serious­ the effort expended. Some people seem and Chop, it comes across as being done ly. Hope that reads right . .. maybe it to be able to stay on this line, or just to by people who have a deep interest in doesn’t, however. Try this. It is possible the fun side of it (as opposed to the work C/L Racing and the promotion of same. to be heavily involved in something, side) and are able to recognize when Naturally. You would expect that from right up to the point of winning at any they have crossed over. Toodles and people dedicated enough to take on the cost, but there is a fine line that can be Chop know which side of the line they job of doing a newsletter. But the great used as an indicator that the fun quo­ want to be on and they seem to stay thing is that they obviously don't take tient is going down some in relation to there, as witnessed by the following, which appeared in the July/August issue of Racing News: BUSTED!! NEW! INTRODUCING GRAPHICS On the evening of lune 6, 7979, those notorious scroundels, the Levittown pressure-sensitive die-cut numbers and letters made of 100% Flying Bucks (Chop’s one of ’em!) were cast vinyl, meets military specs for outdoor use! scooped up in the largest raid ever by the Middletown Township police! The cops confiscated 1,000 pounds of evi­ just press 'em on anything dence to assure themselves of reaching paper th in their ticket quotas for the year! unlike mylar & transfer decals, Unfortunately, we were the evidence w ill not crack, peel or harden, (there were six of us, including the instantly fuelproof famous ” Tons of Fun” Racing Team)!!! paintable Our crime? Criminal (lying of model aircraft in an abandoned store parking BE conforms to any angle or curve lot!!!! BLACK WHITE RED choice of red, white or black Everyone and their uncle has been VERY ECONOMICAL using this place since the store closed (each sheet contains 28 characters — 2 full sets of five years ago! The three " officers of the numbers & AMA letters plus blank space for "cut-your- peace” cheerfully issued us citations for committing the abovementioned crime. owns") In the spirit of fair play, they also nailed 3" size — under 204 per number the youngster learning to drive and 2" size — under 114 per number those who were banging a tennis ball against the wall of the building! 1" size — under 54 per number Our club president took all of the 420 Babylon Rd., Horsham, Pa. 19044 tickets and went to see the justice of the Peace, who promptly informed him that

96 R/C MODEL BUILDER ASTER LIVE STEAM · CERMAGS · HOLZ MOOELL · PLAN PACKETS · AILEENES CRAFTS · COMO GEAR MOTORS · IRON · PLASTlCART · ALFA BUILOINGS · CONSTRUCT) TUBES· JOUEF TRAINS · PLYSPAN · ALMIRALL SOLDIERS · COREL SHIP MODELS · KAHLERT LIGHTING · POWER MAX · ALYMER SOLDIERS · OUX HELICOPTER · KRlK SHIP MODELS · η£ι i ER

t A Unique Catalog FOX ENGINES JG L R/C Propelle $f 49 95 Barracuda Giant 60 R/C S 124 2 SCIENTIFIC 35 S T S 18 88 JE TCO Elec Motor 49.95 90 R/C 136.3 R/C Spt Fisherman $34.34 POLK’S ot the most 40 R 'C Ma. 103.3 15 R/C 26 66 Nevigato· $ 21 21 Hi Start w/Reei Robt E Lee 31.31 8LUEBOOK 60 R /C Mar S 128.2 O F H O B B IE S W an te d 19 R/C 25 99 Tnerm.c 50 R/C 8 88 & Stake 39.95 Thermopolar 45.45 36 R/C 27 77 East W.nd 100" 31.31 MOKI ENGINE 60 R/C He i 128 2 T A R N O Merchandise 90 R /C Mar 155.5 40 R/C 32.32 Therm ic 72 16 16 2SCC World s Homelite 1 9 m the World 60 R /C Eagte 48 48 K R IK Largest Engine $200 00 MIDWEST Super 2 Eng. $122.22 Glow P'ug Std M R C Cessna Foam ARF $ 23.2 TOPFLITE Thousands Short A Long 69 SO 8elle Padd'e Wheeie· $110.00 Hawk Foam RTF RUBBER STRIP Glow P'ug R/C R/C P51 S 51.51 of Illustrations Gummer Tug 220.00 w/EnyalS $ 78.88 I m m. 1 6m m , 3mm, Short & Long .99 R/C P40 51.51 5 ^ 9 5 P T 109 4 5 " 225.00 Cessna RG RTF 4 6mm Spool 1 Ib S7 5 R/CP47 66.66 FUTABA R/C SYSTEMS w /Enya 35 319 19 K&B ENGINES R /C Guide Book 12.9 R/C Corsair 69 69 6 F N W S 1 8 $254 54 W.per Speed ARISTO DUMAS $ 59 59 R/C Coating Book 12.9 R/CP39 51.51 4FNw'S18 217 4661 R /C w 'M uH Boat R T S 224 24 R/C B**chcf·»! * 69 95 Star 30 $ 34 34 SULLIVAN Super Mor· kote 6-22 Above Avail 220V 27 19 R /C for Car 32.32 D V Soeed R/C Ciummin 69 96 Star 4i> 80 80 43 43 Std Starter $ 25.5 Met M onokote 7,33 3 FN w Nicads 164 63 40 R/C Boat R T S 224 24 64 Wet O f l ’ 2-95 Star 45 FG 13131 3 5CC R.C WMufi 4/47 Del Starter 28.2 Iron >5.55 3 Smgie Stick Tijrboirol 47.47 6V Charge» Huton 113 13 3 5CC Outboard 1/4 Starter 33.3 Heat Gun 22.22 H'S Drv w'S18 108 08 M R.C ENYA ENG W IL L E S C O 12V Oarg«» ’7« Dauntle» 52.52 vVir 69 69 STERLING 2F w/S18 10101 Manne Steam G low Meter 6 95 PT 109 28 28 3.5C:C lnboj»d 09 R/C S 25.25 Mini Fledgling $17 7 2GSW/S18 89 89 Engine Set $ 54.95 USCG Lifeboat 39 39 M i· W/MuM 49 49 .15 R/C 30 30 Fledgling 29.2 ASTER MARINE S.F Tug Smán 30.30 S?0 M m · Seivn 29 29 19 R /C 32.30 6 50CC R 'C Citabna 30.3 W IN G S K IN L IV E S T E A M SF TugLg 55 55 S10 Sail Winch 66 66 29 R/C 36 36 w/Muff 76 76 PT 1 7 70.7 Red Yal*. Blue. S i 5 Bali Beiii mg Servo 35 RiC 37 37 2 Cv' Eng.nr D V 10 8 08 Fokker D 7 69.6 Orange. Wht.. Lt Blue $240 00 37.37 MARX LUDER 40 R/C 64 64 & Boiler DV 20 22 22 Stinson 45 4 rW-4· $ 1.98 S18 Servo 22.22 MARINE MOTORS 45 R/C 64 64 3 Cv' Engine DV 40 34.34 Waco 51.5 9"W * 6 3.95 & Boiler 320.00 FP M CIIB Eiec Richa d w D*ai G 60 R/C 87 82 OV 60 4/ 47 I 2 A. Corsa.r 22.2 12"W ■ 6' 4.50 Per*erverance 6V Motor 20 20 Speed Control 5? 52 Gear $ 34 95 M R.C TAMIYA USS Missouri 36 3 I5"W * 6' 4.95 AH Metal Tufl 750 00 Probar Sa·) Winch 40 40 G.S GELL BATTERY Mm Richard 29 95Porsche 935 $ 59 99 Ma>> Pile Dec 39 95 Amer Scout 37.3 WERNER ENGEL MAR HDW I 2 V 4 , AM P $ 25 95 Tyrell 6 WHL 59 99Yacht Amer 41 4 SCH R/C 4 Services COX M.»*· P.le Hec 52 95 Brass Shaft & Stuffmq 6V4AMP 10 95 Combat Veh 66 66King Fish 22.2 w/Programmable Baby Bee 0 49 S 7 77 Mm. P.ir 29 95 Bo i High Speed 2V 5 AMP 9 95 Lamb. Countach 59.99 Computer $650.00 Subdr »ve 29 .95 Chr.S Craft 63 47 4 TO 051 12" Long $ 19 99 GILBERT ENGINES Po»she 9 36 54 54 R/C Bee (New) '388 ZOr.v* 29 95 18” Long 24.95 074 $ 7 95 Cheetah 70 70 Su»e Starter 12 12 6>ec Jet 24" Long 27.95 I I 8 95 Lamb Countach Comp Med .09 R/C 15 15 w'Micads 59 95 Std Shaft & Neediepomt Gto Head 1 00 66 66 4 FLOORS OF HOBBIES Med 15 R /C 19 19 Neptune Outboard 22 95 Bearing Plane A Wav 6 95 R/C Dunebuggv 60 60 MODEL ELITE 8 " $ 5.9 5 Bombs-A-Way 395 Fenan 312 $ 59 59 R/C Cub Tramer 05 Elec Motor $ 12.95 10” 6 5 0 Both for 8 33 Sherman Tank 122 22 ■ ■ I $2 50 Handling Charge R T F 77 77 Olympus Belt 1 2" 6 75G M A R K Leopard Tank >58 58 R/C Tradewindt Reduction Gea< 24 95 5 5 $10 00 Foreign Orders H C Brass Props 3/BL L&R Gepaid Tank 188 88 R .T .S . 118 18 061 R/C Engine Spear F.sh Boat FG 119 95 WE EXPORT TO FOREIGN DEALERS 1/2 3.25 H. Speed Motor 18 88 R/C Ce»ma RTF 1 -3/4 3.95 w/MuM 39 95Fantome Boat FG 199 95 40 Years of Mail Order Reliability W/Radio 122.22 12 Tw m R/C Nicads & Charger 23.23 2-1 /4 5 95 Islander Twin Call 1212» 279 9034 R/C Sportavia RTF Engine w/Muff 119 95 M R.C WEBRA 2-1/2 6.5 0 Eng Plane 89.95 for phone O 'd e rs with Visa & M C w/Radio 133.33 Heavy Coupling GOLDBERG Hummingbird 40 R /C $ 79 79 O U 8 R O 25m m 2.95 Falcon 56 $ 33 33 Etec Plane 49.95 40 R/C S 89 89 N Y Res add 8 \ Sa/ei Ten - Prop Drive $ 75.75 30m m 3.25 Curtiss Hawk 3131 MaQ'C F ly fle e Plane 6 4.95 60 R/C 98 98 In-store prices slightly higher - Prices subiect to change______

Trade Inquiries: T O T A L K ] 314 Fifth Avenue 346 Bergen Avenue TO Jersey City. NJ 07034 J L K S i New York. NY 10001 (212) 279-9034 (201)332-8100 (212) 233-5085 ENGINES · ARCHIVE BOOKS · EKO VEHICLES · LIL SQUIRT PUMP · RE EL R/C · ARISTO HO BUILDINGS · f IYR0F0AM AIRPi ANES · MAR* IU0ER MOTORS · RUBBER · ARiSTOUGHT E FOX MARINE ENGINE · MERITE SOLDIERS · SAITO LIVE STEAM · ARTESANA LATINA SHIP MOOELS » FuTABA R.C · MINI CARPETS . SCAl fXTRIPS » AURORA 8uS SYSTEM · G the worst thing that could possibly Because the MB-5 is a rather large and It was fun to stand on the apron of a happen would be a $300 fine each! That bulky Peanut, it is best suited for out­ small local airport and talk with Mr. )oe made us feel a whole lot better!! door flying. The big Tern AeroorTestor's Erale, who with his son, lovingly rebuilt Anyway, to make a short story long, 6-inch prop is very effective on this NR59H over a period of 10 years. His justice prevailed and the best deal we model and will handle lots of rubber for tales relate much the same kind of could get was three guilty at $5 each and good flight times. Before flying, check problems modelers encounter in the three not guilty, plus $26 court costs. that the CG is about 1/8 inch behind the "restoration” of a project. The task was EACH!! Think about it next time you go front spar. beautifully done and at no small ex­ out to fly!! The flight pattern on my model is pense. Mr. Erale related that tires which With that, I am afraid we will have to rather unusual but effective. The ship used to sell for $80 each now are more close this month’s C/L column. Yes, I turns to the left in a wide arc under the like $200 each. (It does sound like R/C. know I said there would be a deal on power burst and then turns right for the doesn't it!) The aircraft was located Bob Whitely’s model, but it is too long to remainder of the flight. For power I use a virtually in a junk pile on Long Island, fit in this month. Bob, why don’t you just 22-inch loop of 1/4-inch Sig rubber. This New York. Fifty years after its famous consider yourself as having been put on gives flight times of about a minute. trip, it returned to St. Louis to say hi! hold for a month or so?? · Since the model is light for its size (about Pictures will follow. 12 grams), the flight performance is not LOOKING FOR SUBJECTS Peanut...... Continued from page 59 unusual. Pirelli should boost the times If you’re presently looking for a still further. Have fun. · 1 project for this winter, why not try one with separate strips of tissue between the stringers. Either dope or thinned white glue can be used. In any case, use a 1 to 1 ...... Continued from page 15 syringe or a glue gun to apply the you couldn’t be all three.) adhesive. It’s twice as fast as a brush and For the uninitiated, the “ St. Louis a lot neater. Use steam again to shrink Robin” created history fifty years ago the fuselage tissue. If there are still loose over the city of St. Louis. Curtis Robin spots, they can more often than not be NR59H began an endurance flight on eliminated with a little water. July 13,1929 and continued until July 30, On my model I used dark green tissue 1929. It spent 17-1/2 days aloft for a on top and white on the bottom, as an record 420 hours. The test was begun for approximation of the British WW-II a newly developed 170 hp Curtiss Chal­ camouflage scheme, if you own an lenger 6-cylinder radial engine and airbrush, you can improve on this. For wound up being quite an event. The making the panel lines, rivets, and con­ pilots, Forrest O ’Brine and Dale Jackson, this TRAINING MACHINE (rom nur kit ami Instruct- trol surface outlines, a technical pen is ions. There Is nothing easier to fly flew the aircraft some 25,500 miles, For additional info &· our Catalogue send hard to beat. If you decide to use a fine consumed 3590 gallons of gas, and went $1.00 to LOU PROCTOR, P. O. Box9G4l. San Diego. permanent marker instead, put it on last, through 48 air-to-air refuelings. The C alif. 921 Of). Kit mfgd by Proctor Corp.6821 Convoy Ct.S. I) Ca. since dope will dissolve the dye. fliers earned $31,255 for their effort.

NOVEMBER 1979 97 Last evening, just four days before the Nats, the Abel family and a cheering section from the Underwoods witnessed the flight of the 12-lb. Mig 15 at Buder Park. The thrilling part of the event PRODUCTS beyond the actual flying was watching WORLD WIDE MARKETING FOR D & R AND OTHER FINE PRODUCTS Dan as his baby slowly gained speed and flew at his father’s guidance for five or so BULKHEAD SWITCH MOUNT 98^ laps, and then to take the handle himself MOUNTS ON: and blast it skyward for his own "first.” Bulkhead of airplane. Floor of car. That’s what it’s all about, friends. Inside of waterproof Next month the Nats! · boat boxes. ... Or any place you desire. F/F Scale .... Continued from page 57 Push-rod can go in any of three directions. amazed at the number of planes that Complete with mounting screws. appeared from seemingly nowhere. Landing at Oshkosh behind a serpentine 3501-B West Moore St., Santa Ana, line of aircraft was quite a thrill. The Phone (714) 557-1453 CA 92704 controller was expounding directions like you wouldn't believe to 30 or 40 of those from the pictures included this and have less than a two-foot span! aircraft, keeping them spaced both month. The stable of three in the one Come to think of it, you’d probably be vertically and horizontally. Oshkosh, by shot are those of the late Harold Krier. better off making it 1:1 in the first place. gosh, was finally realized! After check­ The famous Chipmunk in the fore­ Have you got a scale project you think ing in, we found our buddies from ground is shown after its last changes is unique? Let’s hearabout it. Along with Flabob and had a most enjoyable eve­ with a larger engine and three-bladed this, it would appear that the Nats will ning talking about aeroplaning. prop. The Great Lakes and clipped-wing see a ducted fan control line Mig 15. It wasn’t until we were at the field the Cub are also shown. These aircraft, I While it’s not R/C, the builder, Dan next day that we truly realized we were assume, have made their way to the Abel, a young man with a desire, has at Mecca, as we walked the many hun­ museum being set up in southwestern used a Scozzi fan and a K&B 7.5 with a dreds of acres of beautiful aircraft. Kansas in Harold’s name. pipe. Dan’s dad, Dave, loves different Airshows were scheduled every after­ The other aircraft would appear to be types of aircraft as well. Several years noon and they were most spectacular, what is popularly referred to as a chal­ ago, he flew an R/C model shaped like a and were varied enough each day that lenge. The Stits Sky Baby rests in the EAA Liberty Bell in the Nats pattern event. you did not get tired of seeing them. Museum at Hales Corners, Wisconsin. Dave has fostered many other scale and The area of most interest to me was The photo shows no size reference close scale-type aircraft that came out of his the antiques. These are the type of by, but be assured it is small. As I recall, exposure at his place of employment, aircraft that lend themselves more to you could probably make it 1/4-scale McDonnell-Douglas. modeling than some of the modern types. There are so many beautiful antique aircraft there in competition r that I do not see how tht judges can HAVE WE GOT choose the best one out of the lot. I took several black-and-white photos of A SYSTEM FOR YOU! aircraft that I thought some of you may Pro Line has a radio control consider building. One in particular was system to meet your needs in the a DeHavilland Puss Moth. To my sur- rise, this airplane is much smaller than I air, on the ground, and in the water. ad expected. The cabin is not much If you are starting out larger than a J-3 Cub. The cabin Wacos and want something better, and Staggerwing Beechcrafts are so look at the Pro Line CADET series. A plush that it would be most enjoyable If you’re the sporting or flying cross-country in these magnifi­ competition type, ask to see ==3 cent airplanes. *■ Pro Line's "middle of the line” We spent four most enjoyable days at I Oshkosh before we departed for the COMPETITION series. And if you >9 long trip home. There is so much to see need the extra features to win that that it would really take the whole week important contest, the Pro Line in order to see everything. Not only that, CUSTOM COMPETITION series new aircraft keep arriving throughout is for you. the week. One such example was a most When it comes to quality, outstanding Travel Air Mystery Ship. This machine was absolutely flawless, you can't beat Pro Line. and get this: it even had an automatic Watch for the new Pro Line pilot! Another incredible machine to 3-channel system. arrive later on, the only example of its It's coming! kind, was a trimotor low-wing Stinson. I can’t remember the number, but there All systems available with are no words to describe it! We found single or dual stick. out later that a replica Bristol “ Brisfit” fighter had also arrived later on in the week. Hard telling what other gems we missed seeing. Next time I’ll plan to Pro Line Electronics Inc. spend the whole eight days! 10632 North 21st Ave., Suite 11 Phoenix, Arizona 85029 Each day the warbirds put on a mag­ (602) 944-4626 a subsidiary ot Pace Industries nificent show. It is downright thrilling to hear all of those sounds produced by the radials, Rolls, and Allisons. You have to

98 R/C MODEL BUILDER be there to know exactly what I mean. Along with all of the airplanes, there are exhibitions of all kinds, flea markets, and symposiums on every subject relative to airplanes. Maybe a week isn’t enough to SLOPE AND THERMAL SAILPLANE see everything! Typically, on the day of our departure, the weather was stinko. All indications were that to the west everything was clear, but you sure couldn’t prove that at Oshkosh. We finally left about four hours beyond our desired takeoff time. We flew home a different way, heading for Lincoln, Nebraska, where the Na­ tionals were being held. We had figured on getting there early in the evening and spending the night with some of our modeler friends. We arrived at Lincoln Municipal about 5:30 p.m. We were loaned a car to get to the other side of the field where there is an ex-military airbase. Jack and I were both disap­ pointed at what we saw once we were there. We were told that all of the F/F activities were 40 miles out of town and that many of the modelers competing were staying in motels near the flying site. With this bit of information we SPECIFICATIONS: decided to cancel our plans to spend the W ing-99.75" wing span night in Lincoln, so we pushed on with Area - 760sq.An. 1 2 7 A sp e c t R a tio another couple of hours of sunlight left. R o o t A ir fo il - E p p le r 3 8 5 The rest of the trip home was fortu­ M o d 2 Τψ Airfoil Johnson J6 nately uneventful. We flew into eleven with 3° washout states and were greeted warmly when­ Stabilizer-120 sq. An. ever we landed to fuel or spend the Total weight less radio ■ 40 oz. night. The trip was an experience from the standpoint of navigation, which Jack did with great aplomb, and of learning COMPLETELY READY TO FLY the weather. The weather in California is Ideal for beginning fliers, the Epoxy fiberglass fuselage com­ quite predictable, and I’m sure you Sea Breeze is designed for the plete with push rods installed, Midwesterners would agree that that is definitely not the case back there. I now modeler who wants the best fully painted in white. Wings know what a genuine thunderstorm is available sailplane, but hasn't and stabilizer molded from and what visibility unlimited is as well. It the time or ability to build one. epoxy fiberglass, available in is certainly great to be able to see as far as Utilizing the most advanced choice of six colors (red, blue, the eye can see over the horizon. lay-up techniques along with our orange, brown, purple, or yellow). So, in closing, I hope you don’t mind Just install your radio and go fly! that I didn’t talk model airplanes this molded process and efficient month, but if you love airplanes like I do, airfoils, the Sea Breeze is strong, Painted — $229.95 I don’t think you’ll mind too much in me maneuverable, and easy to fly. Un-Painted — $169.9 5 sharing this most memorable trip with you. If you can ever make this sojourn DEALERS! Contact one of these fine distributors who handle our kits: • A/L DISTRIBUTORS * GREAT PLANES DISTRIBUTORS * MIDWEST MODEL SUPPL Y * TECHI-MODELS yourself, please do it. Especially those of * B PAUL DIST * PAN AMERICAN * WORLD ENGINES Additional Distributors Wanted you who are not that far from it. In spite of the fact that there are many thousands of i M i n r i n i people in attendance, there is more than n/C A I P C P A F T enough space to move around, so that 485 EASY STREET SIMI VALLEY. CALIFORNIA 93065 (805) 527-4004 the crowds become incidental. Believe it A m eriea · large*i manufacturer of rf»o«Y fib r r fla ii tu te la g e * or not, in spite of all these people, there does cost an extra 2-1/2 pounds or so. the way, the paint scheme was obtained was no trash to be found among all of The extra weight isn’t as bad as it may from the book. Aerobatic Airplanes, those acres of ground. These are a seem because of the 1400 sq. in. of wing published by Repla-Tech. Several inter­ fantastic group of wonderful people. area. The glass covering went on very esting Pitts paint jobs are offered in the I'm looking for a Bellanca Crusair to easily. Simply coat the surface with a publication. restore so I can go back and compete in minimum amount of resin, roll on the The only fault I could find on my Pitts the Classic division. If any of you out glass cloth, and then squeegee the kit was the fitting of the bottom wing to there know of any such bird, I would excess resin off the surface. Do be the fuselage. I had to remove over 1/8 appreciate knowing about it. Next careful not to run the factory supplied inch of foam from the fuselage to get a month . . . back to modeling! · squeegee with an excess of pressure, proper fit. The actual removal is quite since you will form ridges in the foam. easy, but I was concerned about remov­ Pitts...... Continued from page 23 After the glass was laid in place and was ing too much. Checking the correct factory supplied optional epoxy resin/ completely cured (resin takes about 24 wing incidence was obviously in order, fiberglass cloth covering. I didn’t have hours), three coats of K&B primer were but the instructions don’t state the the Econokote experience to do a brushed on and then sanded. A super actual amounts. I called the factory and complex color scheme, and I was also finish is the result. One would never was informed that the correct amount concerned about the hangar rash prob­ know that the basic structure was foam with the thrust line level is 3 degrees in lems on the foam. The surface produced plastic. Looks like a solid fiberglass the top and bottom wings and 1-1/2 with the fiberglass is very durable, but it airplane. Total weight was 16-1/2 lbs. By degrees positive (l.e. up) in the stab. I NOVEMBER 1979 99 place one could get in trouble is with dead-stick landings. The Pitts glides like a rock, and having some power on during the approach certainly is helpful. The roll rate can be adjusted to almost any rate you want; it’s just a matter of THIS MANY TEXANS aileron throw. The aerobatic potential is unlimited. Obviously, the aircraft can CAN'T BE WRONG! use more power. (I don’t think there is a Pitts design that couldn't use more power! That’s just the nature of the design.) Next step is to put one of the HP 120 twins on the Byro Drive. Doubling 142 KITS · AVIATION LITERATURE the horsepower should be quite inter­ NEW CATALOG SI.25 · ACCESSORIES esting. At $189.95 for the kit and $89.95 for the « RICK FULLER PftetO •{►MAJESTIC M O D ELS ·)· THESE VALLEY R/C FLYERS DIDN'T HAVE Byro Drive, the value is excellent. The TO USE 1144 GALLONS OF MAGNUM 3273 W EST 129 ST engineering level is outstanding. The kit PLUS 10 IN JUST 24 MONTHS CLEVELAND. OHIO 44111 goes together very easily in a series of simple “ fun” steps. Excellent results can Here's what they have to say: engine with a Perry Pump Carb powered be obtained by covering the model with Extremely clean burning with minimum clean up Econokote or with the fiberglass cloth & no goo or black residue." the Pitts. The Perry Pump carb was used "Cooler running even with a 14x6 on a O S. 60 ” instead of the HP Automix carb to process. It appears that the Byro Drive is "Minimum needle valve adjustments" provide additional power because of the a zero maintenance device that will "Runs longer per tank of fuel." larger diameter bore in the Perry. A provide hours and hours of use. The "A great idle with a smooth transition to the Robart Pump and a Robart Auto Mix is flying ability of the Pitts is excellent, with top end." required to operate the Pump Carb. I performance to match any flying skill of Less wear for minimal engine failure." had trouble with the idle on the carb the pilot. MAGNUM PLUS FUEL until the Auto Mix was installed, then Tne full-size Pitts factory has a slogan: in 5 different blends the idle was fine. A Semco adjustable “ The Pitts is something special.” So is MAGNUM GLOW PLUGS boat silencer was used because it was the Byron’s Pitts. · Wide Bar R/C for Cross Flow eng. only silencer I could find that would fit Narrow Bar R/C for Schneurle eng. inside the cowl. Slope...... Continued from page 32 MAGNUM C.L. HANDLE The HP as supplied with the men­ SEE YOUR DEALER tioned equipment turned the Zinger just plain turbulence,littlespinningtops 20x8 at 6,000 rpm. It appears that the of violence and destruction, garbage- ALDRICH MODEL PROOUCTS movers. P.0. Box 817 silencer is reducing the rpm significant­ Edinburg. Texas 78539 ly; the installation of a tuned pipe is Almost every slope has an area or two 1512) 842-3379 or 383 0327 required for the more advanced aero­ that generates this kind of turbulence batics typical of a Pitts. I would recom­ . .. even the famous cliffs at Torrey used a Robart incidence meter to check mend that the aircraft not be flown Pines. The only safe way to deal with the angles. As it turned out, the inci­ unless 5,700 rpm is obtained prior to such areas is to avoid them completely. dence settings were right on the money. takeoff. Another 200-300 rpm at the And you can spot many of them in I also found that the pre-cut interplane prop is a major power change. Probably advance. Study the face of your slope. wing struts fit perfectly. As noted in the 6,500 rpm is ideal and is easily within the Picture the river of air rushing against it, instructions, the belly pan under the capability of the ΗP 61R equipped with a pushing and crowding its way over it, wing has to be fitted. This is quite easy to tuned pipe. flowing in and around every nook and do, since the foam sands so well. On the first flight, with the engine cranny, every irregularity in its surface. The installation of the radio is no big running slightly rich and a prop rpm of Air is lazy, just like water. It won’t pile up deal. There’s lots of room. I used Kraft 5,850, tne takeoff was quick with a good and climb over the top of a hill if it can KPS-15H servos with my Signature radio rate of climb. Additional down trim was squeeze around the ends, instead. Don’t system. Regular servos would probably required (even with the 1-1/2° positive let your plane get caught in one of these work, but the heavy-duty servos sure in the stab). Loops, rolls, positive snaps, high-velocity end-squeezes; you might can’t do any harm. Don’t forget to use an and inverted flight was performed along as well try to fly out of a giant front­ extra large (Kraft KB-4F) battery pack with an uneventful landing. Flight char­ loading washing machine. with the heavy-duty servos. acteristics are very docile and quite Next question: how do you know that A Hirtenberger HP 61R Gold Cup suitable for the beginner flier. The only ALL of the air hitting your hill isn’t

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Get the double filtration perform­ ance of the Sullivan Crap Trap when you fuel up, too. Two different Strong, lightweight, "R EA LIS TIC sized filters keep those particles out landing gears eliminate erratic vibra­ of your tank. Fueler comes complete tion and feature short fulcrum for GLOW PLUG KLIP with 4 feet of Sulli-Cone tubing — ground hugging ability. Caster ac­ Fully assembled and unbreakable Strain not 3 feet of lesser quality tubing. tion. Adjustable pressure. Easy to relief feature ends broken wire problem And tubing WON'T COLLAPSE customize. Sizes to fit wheels from Free replacement if this Glow Plug Klip when defueling. Only $2.50 1%"to 3". ever breaks.

WARNING To All Modelers: Do Not Fly Near Overhead Power Lines

PRODUCTS, INC. 535 DAVISVILLE ROAD · WILLOW QROVE, PA. 19090 · USA (215) 6 5 * 3900 squeezing around the ends? If the hill is truly 300 feet long, I can almost guaran­ tee you that it isn't. But just to be sure, make the dust test. Go down to the foot of the hill, look both ways for environ­ MAMMOTH SCALERS mentalists, then throw a few heaping Our business is devoted to the manufacturing handfuls of dry dirt up into the air. Step of herd to get items for 1/4 scale modelers. We now have available a complete line of engine aside to watch the dust pattern over the mounts and m ufflers for most .90 to 1.5 engines face. If it rises briskly up and over the lip, such as QUADRA, SUEVIA and WEBRA. Com ing s o on . you’re in business; chances are your Scale Instruments and a few more goodies. glider will do the same. (If your hill is too high, you may have to perform this ritual ENGINE MOUNTS somewhere up on the face nearer the lip. Big hills often develop “ dead spots” at their bases, where there’s little air movement. Keep this in mind, come landing time.) ALUMINUM COWL 8 1/2'· Oia. X 5 1/2" Max .9 0 , Webra .91 Mokl 1 .5 , S u e v le 1 .5 Now that you're satisfied that your 17.50 16.95 18.95 JUNGHUSUR Cowl Blisters chosen slope does indeed generate lift, A ll Bounts d rilled and tapped. Cap screws inc. and Mounting Brackets you might want to apply this same dust- 6.50 test to the area just behind the lip. Does MUFFLERS QUADRA ENGINE MOUNT For .90 to 1.5 engines the dust roll and tumble violently across For upright or inverted use the top of the hill like boiling water in a pan? Then maybe, just maybe,you don’t want to land back there. Maybe you want to land someplace out in front of the hill, or down on its face. I think it’s probably safe to say that more airplanes ♦ A are wrecked behind the lip than out in QUADRA MUFFLERS Webr* *91..»7.95 Vebr. .91..I? . 95 v.bra .91..18.95 front of it, on the average slope. Until QM-IST 1.5...I7.95 Mokl 1.5...17.95 Mokl 1.5..18.95 Inverted Suevia 1.5 18.50 Suevia 1.5 18.50 Suevia 1.5 >9.95 you learn your site, you shouldn’t fly Side Tube Exhaust extension tubing included back there any more than necessary. a*-usT ls·95 Upright QUADRA THROTTLE CONTROL DI M C T . Well, we've put this off long enough. S>de Tube Add 10% or miniaiua of SI.SO 19.95 Let’s get the plane out of the car and for postage and handling. prepare her for flight. Check that wind Calif, residents add 6% for sales tax. UPS shipping when velocity again. Remember that if it’s 12 ever possible. C.O.D.'s OK mph on the flats out in front of the hill, DEALER INQUIRES INVITED Exhaust 1M-IBT it’s going to be 15+ right over the lip. This extension 19.95 QH-UB] Quarter Headquarters is the “venturi effect” mentioned last tubing included 21.50 P 0 BOX 12321 San Francisco. Ca. 94112 month. It's perfectly normal, not just a

NOVEMBER 1979 101 1 ballast. CANNON SPORT ENGINES And while you’re stuffing that ballast R/C SYSTEMS 7 R/c inside, give some thought to crash­ J CANICANNON R/C SYSTEMS NOW IS ABLE TO BRING proofing. What will happen to that dead THE MODELER THROTTLE-EQUIPPED ENGINES DESIGNED SPECIFICALLY FOR SMALL weight (or, more important, to your R/C AIRCRAFT. ALL MODELS OFFER EASY STARTING, RELIABLE IDLE, SMOOTH SPEED radio equipment) in the event of a TRANSITION AND GOOD TOP END POWER. 03 crash? Don’t stow something in there that will pulverize your receiver in a A. .061 $ 3 4 .9 5 ř/c crash . . . pad both the ballast and the R/C ENGINE radio to prevent it. And don’t assume ENGINE CANNON R/C you will never crash, because you almost IS TH E SO LE U .S . certainly will, sometime. That’s the - a · i m p o r t e r f o r meaning of SLOPE: Scrapped, Lost, Or G-MARK EN GINES.1 Pulverized Eventually. A cynical friend of mine used to say "We design thermal soarers to fly; we design slope soarers to crash.” He built some tough, heavy $ 3 9 airplanes in his day. Some hold him .122 R/C responsible for the current landslides in COMPLETE R/C BROCHURE- Malibu. .50 IN U.S. ($1.50 FOREIGN) TWIN But enough of this sandbagging. The hour has come to give her the heave. SEE YOUR DEALER $ 1 0 9 .9 5 Aim the nose slightly downhill, maybe OR ORDER DIRECT ten to twenty degrees, grip the fuselage ADD $2.00 FOR SHIPPING & HANDLING. 20% DEPOSIT solidly, and shove her smartly out into REQUIRED O N ORDERS. CAUF. RESIDENTS ADD SALES the gale. Is the receiver on? The first ten TAX. DEALER AND DISTRIBUTOR INQUIRIES INVITED. seconds of a slope flight are the hardest: ^ 13400-26 Saticoy Street Norlh Hollywood, Colif. 91605 ______(213)_764-1488j penetrating out away from the hill and into the smoother air of the lift zone. Be nasty little trick God has cooked up weight “ to make it fly downhill.” Back in ready to apply down elevator in case she especially for you. This venturi velocity is the Soap Box Derby days, I had a friend tries to balloon up over your head. Fly the headwind you have to cope with who added weight to the front of his car the airplane; don’t expect it to fly itself. during the launch, so you want to be “ to help pull him downhill faster.” Take command of it and drive it force­ absolutely certain that your plane is Stupid as it sounds, he seemed to win fully around the sky. If you go tosleep at heavy enough to penetrate it. Some about as often as the rest of us. Which the controls you’ll wind up back in the pilots prefer to avoid facing this venturi wasn't often. trees, or worse. Stay well in front of the by launching their plane down lower on lip, and do a simple figure-eight pattern, If you insist in fiddling with the making all of your turns upwind, away the face of the hill, where the wind isn’t controls. I'd recommend that you leave quite as strong. from the hill. Don’t turn downwind the elevator alone and try adjusting the towards the hill until you have plenty of If you have any doubts about pene­ rudder for more throw. There are times, altitude . . . a downwind turn on the trating, add a little ballast on the center on a windy slope, when a whole lot of slope can be a real disaster if you’re not of gravity. Some people put a half-ounce rudder isn’t half enough, and way too prepared for it. The second you turn or so into the nose as well, to bring the much would probably be just barely downwind the nose drops, the plane CG slightly forward for slope flying. I adequate. suddenly appears to double or triple its don’t recommend this, because it de­ Check that wind once more, right at speed in a headlong dive towards the sensitizes the elevator, and you might the lip of the hill. Have you ever flown in hill, the rudder controls turn to mush, just find yourself in a position where you that strong a wind before? Suppose you the elevator becomes your sworn need all the up-elevator you can get! But heave your beast out into it, and it’s too enemy, and your entire life begins don’t mind me; I’m one of those cranks light to penetrate. It’s going to blow flashing past in front of your eyes as you who believe that if you have an airplane backwards right over your helpless head realize you’re going to era.. . in good flying trim you should take care and end up either in the lip turbulence But wait a minute . .. what’s going on not to upset that balance. Adding weight just behind you or else in those infernal here, anyway? Why is a downwind turn to the middle of a see-saw won’t change trees. Whereas, if you add too much on the slope so different from a down­ its balance, whereas adding it to either ballast, your plane will penetrate fine, wind turn when thermal flying? Answer: end will. But if you feel that sloping is but it will slowly sink and you’ll have to it isn’t. Any time you turn downwind, largely a matter of flying downhill into land it down at the foot of the hill your plane has to accelerate (relative to rising air, you’re welcome to add nose- somewhere. Better to add too much the earth) in order to catch up with the river of air and regain its necessary QUADRA MARINE ENGINE #859 Aeromarine Super Drive $100.00 airspeed. This acceleration always costs UST91M M SALE MICE *125.00 you some altitude, and during the BO A TERS!! An ignition engine can turn a prop at the same speed as a 60 acceleration the rudder is bound to Aeromarine s Super Drive is designed for an ignition engine to turn a prop at 2 5 times faster than the engine speed. Ideally suited for seem a little sluggish, since it hasn’t got K| the Quadra Super Hustler. Sea Tiger and other ignition its normal airspeed back yet either. Even I engines Také advantage of fuel economy and investment after the airspeed returns, the rudder E j cost of a ignition enqme and use Super Drive in those large may still appear sluggish, because the Hydro's and Deep Vee's As with all Aeromarine products, this unit was designed and manufactured to the highest ma· plane is being carried so far downwind W H chine standards and will give smooth, reliable performance with during the time required for a normal I ~ a new sense of realism all the way to R.P.M .'s of 25,000 +. Super Drive has an all aluminum case for light weight and an turn. To an observer, even a perfect turn anodized finish which retards corrosion even in salt water. Each will look more like a long parabola than Vt" stainless steel shaft is supported by two double shielded, a half circle, and the plane will probably T h · F lr t t and O n ly B o a t M otor M ount siain,ess s,eel bal* bearings to insure smooth and easy running. come dangerously close to splattering For The Quadra Engln· itself all over the hill in the process. Now ***0 Standard 5" wide, 114.94 o0" Aeromarine Enterprises Inc. you see why slope fliers say “ too much Includes all mounting bolts. 709 Longboat Avenue . rudder is never enough." Black anodized to prevent corrosion. ^ "“ I Beachwood, N.J. 08722 ■s° (2011 240-3882 ίΤΗ Κ Interchangeable with most .60 and .90 mounts. .Distributor and Dealer Inquiries Invited Once you get the feel of slope flying, you’ll find it’s a great way to build stick 102 R/C MODEL BUILDER time, since it gives you a lot more flying time per launch than flatland soaring does. I like to use the slope to make intermediates out of beginners; as soon as they show me that they can land their H S FO R TUBIN G thermal ship approximately where they want to (or catch it consistently without losing teeth), they’re ready for the slope. Up on a windy hill you have to actually fly the plane, not merely interrupt its glidepath with an occasional radio command. Because the whole show happens right out front, within a hun­ dred feet or so of everybody, both student and instructor can see every mistake clearly, and the student quickly develops the visual-feedback loop so necessary to R/C flying. Of course, accidents seem to happen more rapidly on the slope, so the instructor has to be ready at a second’s notice to grab the controls; fortunately, the learning curve is steep for slope fliers. By the time the average flier has wrecked and repaired and jury-rigged and reflown two or three thermal soar- ers on the slope, he’ll probably have discovered on his own the Great Secret that the slope-soaring fraternity has guarded all these years: on a mediocre or better hill, virtually anything can be made to fly! Flying wings, flying saucers, fuel-soaked power planes (take out the engine, replace it with ballast, and remove the landing gear, if practical.) Even control line combat ships with radios servo-taped to their wings and fuselages! One of my all-time favorite slope airplanes was a “ profile” model of a J-3 Cub, complete with sheet dural landing gear and Du-Bro scale wheels. The cockpit area was see-through, and she looked very realistic in flight, in spite of being only 1 inch wide in the fuselage. Span was 54 inches, just about the right size to lead a 90-inch model of the Schweizer 1-29 across the sky. Yes, I realize that the full-scale Cub, with its 65 horsepower, wasn't much of a towplane, that I should have dolled her up to look like a Super Cub, at least. But it was like this, y’see: Sterling sells some nifty Cub decals, and Monokote comes in this incredible CUB YELLOW color, and it’s so easy to cut out two long black light­ ning bolts from trim sheet, and . .. aw, shuckins. Grandpa, them was surely the days! · *I airfoil, just rounded the edges and itself very well to an unusual HLG F/F ...... Continued from page 67 tapered the tips after assembly. If 1/20 trimming scheme. I left the glide a bit maybe I was on the right track. sheet is not available, pick out some of stally, but with a definite glide circle, by the thicker 1/32 stock from your dealer’s removing clay after initial glide testing. I based the rest of the design on Bill shelves or your wood box. When the model hits lift, it stalls, then Blanchard’s Polly, using the same fuse­ I finished my Un-Pollys with a couple slides off the wingtip into the glide lage and tail surfaces. I used a fully of coats of lacquer sanding sealer (Glid- circle, keeping itself centered into the parabolic planform to cut down the den’s is a good one) and a thin coat of thermal at all times. This is an excellent wing area, give a slightly higher aspect nitrate dope. I built one version with a trim for breezy afternoon conditions, ratio, and give a better spanwise weight 3/16-inch balsa wing and another with a since the glider will drift downwind in distribution by allowing more tapering 1/4-inch sheet wing. The 1/4-inch thick the thermal, rather than gliding through of the wing blank before carving the wing came out about 30 grams; the 3/16 or out of lift. This bobbing and weaving airfoil. This should cut down on the model was a bit lighter. Both ships per­ “ bounce" (hate to call it a glide) is not model weight, so I cut down the fuse­ formed about the same and trimmed out pretty, but it gets the time on the card. A lage stock slightly and decided to leave easily. I lost one while maxing out at the more normal trim can be used in calmer, off the DT until I started losing gliders. Hawks' Spring Opener this year, but it light-lift conditions. The stab was made of 1/20 stock to took less time to build the model than to MYSTERY MODEL speed up construction and aid incidence rig a DT. This month’s mystery isanothersimple alignment, since I didn’t sand in an I found that the V-dihedral model lent concept gas model. The designer came NOVEMBER 1979 103 you water-spray, but in a few minutes the glue dries and trimming can take CUSTOM TUNED ENGINES FREE FLIGHT place with sandpaper or X-acto blade.” AND COMPETITION HARDWARE I’ve been having my junior high ACCESSORIES students use this method and agree 100% with Al’s comments. The dope Specialists in standard WINDING BALSA method requires too much speed for or throttled Co* .049/. 051 HDQKS STRIPPERS inexperienced builders, but I’ve had and Rossi .15 anginas, u a u t t t r a o t o p o a m u t t a " a m o j i " t e n o r u a __ good luck with the white glue for parts 5 quality racing products. attaching tissue to models like the Peck JET EX SgSS·^ EIRELE TØW R.O.G. even with kids working on their For datailad information, first model. I’m probably too set in my sand 15 c stamp ta jSEWPE HUB D T K1Ť1&V ways to use it on my own models, but it’s Kustom Kraftsmanship (ϊΐφ ί " ^ τ τ Λ a good tip to remember when you do _____ C A TAL O O 9 t Ö O ----N covering in the house with a family that P.O. Box 2699 cJIM ERØERET REPLIEAS objects to the smell of dope. Laguna Hills, CA 92653 RETURN OF THE DGA: 1442 N. FRUIT AVE. THE WORTMANN EX 60-126 (714) 830-5162 FRESNB. EA. 93728 (THINNED TO 10%) Bob Stalick published about 60 DGA’s up with an unusual fuselage arrange­ "The major difference, comparing (Darn Good Airfoils) in his term as editor ment and a type of wing construction this method with dope, is that the water? of this column. You'd think that this that didn’t require any ribs to be cutout. glue mix stays wet and sticky for a much many different airfoils would be enough I saw one of these fly at the 1977 Nats, so longer time. It neither soaks in quickly to satisfy everybody, but I’ve received a few of them have survived. If you think nor dries as fast as dope. Strangely many requests to keep on with the you can identify the model, send in your enough, this quality allows working series, so after looking through a few entry to the R/C MB office and see if faster than can be done with dope, and a sources. I’m ready to begin, with some­ you’ve won the free subscription. covering job can be completed in a thing sort of different! shorter time. The secret is to put a coat of I spotted this airfoil in the June 1979 COVERING (WITH WHITE GLUE) water/glue all around the perimeter of Aeromodeller, along with an account of From the Phoenix Model Airplane the area to be covered, and then to get the Czechoslovakian champs. Ivan Crha Club newsletter, Al Lidberg, editor. the piece of tissue placed correctly the used this on his A/2 glider, using full “ Tissue covering is normally done first time. After using a small brush to sheeted construction and Monokote using dope as an adhesive. This is fairly coat the structure, use a finger to covering. Ivan claims that this model is convenient and offers few problems, distribute the mixture evenly around the 10 seconds better in calm air, despite the even for those with little experience. edge .. . this helps to ensure fewer gaps looks of the airfoil. There are some other methods, though, and lumps. Because lighter varieties of Actually, the choice may not be as and the use of a 50/50 mix of white glue tissue lose a lot of strength when wet, adventurous as it seems at first glance. and water is worth a try. I had tried this plan on placing the paper correctly the Wortmann’s airfoils are now being used method once before . . . just so I could first time. Using Japanese tissue, you almost exclusively by world-class com­ keep working in the house without probably will not be able to lift or slide petitors on full-size gliders (every com­ smelling up the place with dope fumes the tissue once it’s in place without petitor at the 1974 sailplane World . . . but wasn’t too impressed with the tearing. However, if it’s just about right, Champs used his airfoils). He has been results. More recently, with the return of you can press it in place and smooth the using computer techniques to obtain cold, rainy weather, I tried it again for a edges without too much problem. While velocity distributions which yield a couple of small models. With a little the water/glue is wet, everything looks wider range of low-drag speeds. practice the results are good enough to lost because the tissue picks up the At any rate, the thickness of the recommend that others try it, too. water and expands just like it does when section should give a strong enough wing, and if the low drag is true at model 23938 CRAFTSMAN ROAD \ Reynolds numbersalso.thezoom launch CALABASAS. CALIF. 91302 PHONE (213) 992-0195 capability should be high. Since this is a ‘HELI-CENTER NEW - 24 hour telephone laminar flow section (as designed), the line for night and day sheeted Monokoted construction may * R/C Helicopter books. ordering service — be necessary for best results. Notice that ► R/C Helicopter mufflers, headers, tuned pipes. WEST’ we keep you flying. the ordinates are not the customary 5, • Fuselages for Hcli-Boy and ■•0, 15 percentage of chord stations. · Heli-Babv. Hughes 500. Bell 222. A new concept promotion Boikow i05 and supporLaf RC licopter flying. Sailing...... Continued from page50 • All R/C Helicopter accessories & training aids. righting moment. fHrtr~T' Ϊ1 *! deals — call us. OPERATIONS • Complete range of nc; TELEMETRY: In this system the boat System 80 He lie carries some sort of a sensor, say one for • Demonstrations and Seminars for boat speed through the water. The R/C clubs — ask for details speed modulates a radio signal sent back • Exclusive field representatives ii »O to the skipper where it is converted to a your area. IN STOCK NOW tone in an ear plug. He picks the direc­ And NOW • The latest custom tion he wishes to sail, then trims sails and 'Heli-Boy' kit. specially selected · • The beautiful Boikow rudder to achieve maximum speed, as budget priced - BO 105 fiberglass fuselage kit reported by his ear plug. Such a system helicopter . \0 Four-bladed headsll has its information filtered through the radios >jO r · 'Heli-Babv' II kits. long response time of the hull’s inertia, but it does provide an edge. AUTO TRIM: A more direct approach • Dealer inquiries invited. is to monitor the thrust component of • Clubs call or write for demonstrations. the forces acting on the sails. Since the skipper needs to worry about tactics, cut

104 R/C MODEL BUILDER him out of the loop and install a pressure transducer in the mast heel. This will measure the thrust pushing the boat forward through the water. Lead the transducer output to a microcomputer. The microcomputer will control the sail control unit, trimming the sails in and out to maximize the forward thrust vector as wind vectors change, and as the skipper adjusts the helm. The sail trim function can be immediately over­ ridden by the skipper, such as in the starting maneuvers. While functioning it would endevor to maximize the avail­ able power which the rig could deliver to the hull. My research indicates this can be done for under $250 in off-the- shelf components. Systems like the latter will have to be very weight conscious and will make their first appearance in the A class, then evolve into the lighter 10-R and M’s. Some one-design classes will be unable to prevent their installation, while others will be protected. How the organization at large (AMYA) will react is unclear. Maybe now would be a good time to consider the near future. We are now settled in our new loca­ tion, and it's business as usual from the great Pacific Northwest. I am happy to of 121 trophies to be awarded? Anyone events are slowly catching on, as interest answer questions accompanied with a who says the SAM Champs is not truly has now spread to the youngsters. stamped, self-addressed envelope to the Old Timer Nationals had better In the merchandise lottery (in which Rod Carr, 4Π5 172nd Ave. N.E., Red­ attend one of these functions. about forty people received prizes), the mond, WA 98052. Not many of the modelers realized it, outstanding prize of a two-channel Cox Remember to send your $10 AMYA but it took a group of 13 people to Sanwa radio set was won by Cliff Silva. dues to the Secretary, 7013 Ansbrough assemble all the trophies. All trophies Dr., Citrus Heights, CA 95610. · Cliff, who has been a real hero flying free are shipped unassembled to save freight flight models from his wheelchair, might costs; hence, the problem facing the be able to relax a bit with a black box! Miss Philly .... Continued from page 41 President. It looked pretty desperate at To wrap things up, the President then laminations of 1/16x3/16 spruce to form 11:30 p.m. Tuesday, but thanks to Carter Watts, who made up the badly needed awarded commemorative plaques to all the tail outlines. No steaming would be the SAM officers who have unselfishly required. shafts, and Elaine Brodsky, who pro­ cured additional trophy parts, the tro­ served SAM during 1979. In addition, Lin When building the wing, we’d sug­ Haslam was awarded a special plaque for gest the addition of diagonal bracing if phies stood gleaming and ready for presentation at 7:45 Thursday night. his work as Contest Manager of the 1979 you intend to use plastic film covering SAM Championships. Nothing like such as Monokote. Although the lead­ Only 15 minutes to spare! Little did the majority of the modelers realize they recognizing the hard-working admini­ ing edge and spar are generous in size, strative crew! the wing still needs the skin strength were almost awarded do-it-yourself provided by inflexible bamboo paper trophy kits!! RESULTS covering to keep it rigid. Bracing will After opening remarks, the President Thought we’d never get around to make up for it, with very little weight turned the awarding of trophies over to them, huh? Well, this time we have the penalty. Lin Haslam and Jack DeFond. After the complete dope on the model and en­ The “ Miss Philly" should make a great permanent trophies were given out, the gine used. Based on the models that fuel-allotment event contender in R/C following perpetual trophies were won, you can be guided as to which Old Timers, as it was one of the best in awarded: Free Flight Sweepstakes competitive model you would want to the “ Flying Boxcar” era of gas powered Champion, Bruce Norman; R/C Sweep- select. modeling. Even with radio aboard, the stakes Champion, Don Bekins; Ernie weight should be right around 5 pounds. Shailor Trophy, Bruno Markiewicz; Use plenty of rudder area, but not much Pond Perpetual, Mitchell Post; Com­ elevator . . . it's not a stunt ship! · pressed Air Plaque, Karl Spielmaker; Sheelds Twin Pusher Perpetual, Fred Emmert. Plug Sparks . . . Continued from page 41 Becky Whitney, Miss SAM Champs of showed, the only two being the Herky 1979, made the presentations of the and Anderson Pylon. Otherwise, it was perpetual trophies while the President the usual run of Clippers, Playboys, did the honors on the Sweepstakes Rangers, et al that dominated the field. trophies. They (the rule changers) talk about One of the highlights of the awards handicapping this and that type engine, was the gift of a slag engine (Genie .29) but the writer thinks they may have kit to every contestant who entered and 60 Prop Drive or Quadra Power 60 sq. It. missed the boat in not penalizing the flew in the "Slag” event. Wotta sponsor! detailed construction drawings. P.P. U.S.A. $25.00 obviously better flying models. Food for Another sponsor who should be men­ Canopy & Fiberglass Cowl available Send 15« stamp thought, men! tioned for his untiring efforts is Bob for more details VICTORY BANQUET Boucher, of Astro Flight, Inc., who NICK ZIROLI Would you believe twenty-five first sponsored the Electric events both in 29 Edgar Dr., Smithtown, N.Y. 11787 place trophies, and that there was a total free flight and radio control. These

NOVEMBER 1979 105 Taylorcraft...... :31 MAMMOTH BARKLEY TRAINER 4) Ray Black STINSON VOYAGER Taylorcraft ...... :27 5) Jim Persson Fairchild Forwarder ...... :25 ONE QUARTER SCALE CLASS B PYLON 1) Bruno Markiewicz Alert/O.S. .25 Cv...... 10:46 2) Bruce Norman Zipper/O.S. .25 Cv...... 9:00 $ 3 7 . 5 0 3) Mitch Post Wing Span · 56" Alert/Delong .30...... 8:28 Engine Size · .19 · .35 4) Leslie Norman Ontario Residents Add 7% PST All Balsa Ply & Hardwood Construction DEALERS INQUIRIES Detailed Plans and Instruction Booklet Zipper/O.S. .25 Cv...... 8:27 $ 8 9 . 5 0 WELCOME 5) Ed Rangus Wing Span · 101.75" Zipper/Forster .29...... 8:05 Designed for Quadra Engines l+ U -5 ENTERPRISES l+ l CLASS A CABIN Plywood & Softwood Construction P.O. Box 82 Belmont, Ont. 1) Bruce Norman Kit by Art Lane Canada NOL 1B0 1-519-644-0375 So Long/Ohlsson .1 9 ...... 7:41 2) Wayne Cain 2) Bruce Chandler Dodger/Arden .1 9 ...... 6:21 Thermal Thumber/Black Knight 7:56 3) Leslie Norman RUBBER STRIP 3) James Robinson So Long/O.S. .15 Cv...... 6:04 FAI RUBBER: ENDORSED BY BEST Ranger/Arden .19...... 7:45 4) Larry Boyer U.S. RUBBER FLIERS. MADE IN U.S. 4) Wayne Cain Rockateer A/O.S. .15 Cv...... 5:55 SIZES: 1/4", 3/16", 1 /8", 3/32", 1 /16" Playboy Jr./Arden .19...... 7:41 5) Phil McCary 1mm THICK (.042). SPOOLED, 5) Joe Beshar Commando/Arden .19 ...... 5:10 GROSS WEIGHT 1 POUND. Fox/Bantam...... 7:22 RUBBER STICK PRICE $10.00 PER SPOOL PPD. IN CLASS C CABIN 1) CarICogarSr. U.S. ADDITIONALSPOOLS, $9.50 1) Jay Jackson Lanzo ...... 6:23 Dodger/Torp .32...... 11:57 2) Steve Joseph NEW PIRELLI 2) Bruno Markiewicz G ollyw ock...... 5:46 SIZES: 6mm, 5mm, 4mm BY 1mm. Playboy Cabin/Ohlsson .60...... 8:46 3) Wally Leiper PRICE: $14.00 PER HANK PPD IN 3) Mark Fechner Lanzo ...... 4:45 U.S. ADDITIONAL HANKS, $13.50 Bombshell/Spitfire ...... 8:06 4) Tom and John Keppler SOLE U.S. DISTRIBUTOR AND 4) Bruce Chandler Gollywock ...... 3:59 WORLDWIDE SALES. Clipper/Black Knight...... 7:33 5) Larry Delaney F. A .I. Model Supply 5) Les Payne Cloud Charger...... 3:53 Playboy Cabin/Cyke ...... 7:07 TWIN PUSHER P.O. BOX 3957 TORRANCE. CA 90510 RUBBER CABIN 1) Fred Emmert 1) CarICogarSr. M anulkin...... 1:28 FREE FLIGHT Johnson Sto u t...... 6:58 2) Tim Banaszak 2) Don Cogar Burnham ...... :49 30 SECOND ANTIQUE Johnson Sto u t...... 6:17 3) Clarence Haught 1) Leon Nadolsky 3) Fred Emmert Jr. Birdman...... :09 Gas Bird/Torp .2 9 ...... 12:22 Toft Stout...... 5:51 4) Bill Bell (Sheelds) 2) Leslie Norman 4) Phil McCary Burnham ...... :08 Clipper l/Cyclone...... 8:46 Sm oothie...... 4:26 .020 REPLICA 3) Bruce Norman 5) R.A. Hayes 1) Bob Petro Clipper l/Cyclone...... 7:58 Korda Wakefield...... 3:57 Dodger...... 7:14 4) Mitch Post 2) Mark Fechner Anderson/Spitfire ...... 7:28 RUBBER SCALE Ranger ...... 6:58 5) Walter Johnson 1) Carl Cogar Sr. 3) Sal Taibi Clipper l/M adewell...... 7:07 Lanzo Puss M oth...... 1:58 Playboy...... 6:55 CLASS A PYLON 2) Les Payne 4) Wayne Cain 1) Jack Jella Miles Magister...... :54 Interceptor ...... 6:53 Ranger/Arden .19...... 9:00 3) William Bell 5) Jack Jella H O B B IE S + SAVE 40% Enya .19R/C $32.44 Ft/C UNITS, AIRPLANES, Enya .35R/C $37.79 HELICOPTERS, CARS, Enya .35 $31.80 PLUS PARTS FOR ALL ITEMS é n VAs a l E

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106 R/C MODEL BUILDER Strato-Streak ...... 6:35 COMPRESSED AIR 1) Karl Spielmaker μ ic u d S Puts the Excellence in Your Models Hobart/Hoosier ...... 2:12 2) Tim Banaszak ★ 3 Indoor & 3 Outdoor “Peanut Scale K Hobart/Hoosier ...... 2:07 ELECTRIC .020 * MICROLITE - Plain & Silver! W u J Ä - 'Λ I 1) joe Beshar * Early Bird Tissue for Antique Aircraft! Is (- Playboy/Astro 020...... 1:09 CLASS C PYLON * 2 R/C Model Aircraft Kits!!! Exeter & TáylorcnjHt ^ \<« 1) Bruce Norman * 3 Outdoor 22" Span Rubber or C 02 H&wérKiťs! I Zipper/O.S. .35 Cv...... 18:10 2) Les Payne * Rubber Models with 18" Stripwoqd 9 Super Printwood! Playboy/Atwood .60...... 8:54 3) Robert Findlay * True OLDE World Japanese Tissue'White, Yellow, Orange Playboy/Cyclone...... 8:40 * New Super Lite Japanese Tissue in 6 Colors! 4) Larry Clark Albatross/O.S. .35 Cv...... 8:38 * Largest selection of Rubber Strip in the World! 21 SIZES 5) Jay Jackson Wasp/Torp .32...... 8:30 * Microfilm, glues, C-Paper, Indoor wood & Accessories!! SCALE GAS * Plan service over 17 Scale, Semi-scale & Peanut scale 1) Cliff Silva Corben/Bunch...... 18:30 * At better dealers everywhere! CAT, $1.00 2) Bruce Chandler * MICRO-X-Productr Picture: Margie Holding Fokker E-111/O.S. .10 Cv...... 16:59 Stinson & Piper Peanut Kits 3) Carl Cogar P.O. Box 1063-A Corben/TD .049 ...... 11:35 with Taylorcraft & Voyager 4) Jim Persson Lorain, Ohio 44055 22" Span Rubber C02 In foreground. Taylor Cub/Mac .1 9 ...... 10:37 5) Phil McCary Cub/Ohlsson .60...... 9:43 3) James Buice 4) Andy Anderson FUEL ALLOTMENT ANTIQUE Playboy/K&B .29 ...... 841 Quaker/Spitfire ...... 480 1) Mitch Post 4) Ed Solenberger 5) Lawrence Bekins Anderson/Spitfire ...... 13:58 Challenger/K&B .29 ...... 660 Playboy/O.S. .35 ...... 472 CLASS A-B IGNITION 2) Sal Taibi 5) Bruce Norman 1) Don Bekins Powerhouse/Forster .99 ...... 12:17 Playboy/S.T. .29...... 583 Playboy/O.S. .30 ...... 998 3) Mark Fechner CLASS C GLOW Lanzo/Cyclone...... 12:11 2) Ferrell Combel 1) Don Bekins Playboy/Forster .29...... 55 4) Cliff Silva Playboy/K&B .3 5 ...... 1120 Roll/Baby C yke...... 11:30 2) James Buice 5) Bruce Norman Clipper l/Brown Jr...... 10:01 Playboy/K&B .35 ...... 1096 "SLAG” EVENT 3) Ross Thomas 1) Clarence Bull Playboy/K&B .35 ...... 1072 American Ace/Genie .29...... 5:20 4) Ed Solenberger 2) Larry Delaney Challenger/K&B .4 0 ...... 911 Ranger/Thor .29 ...... 3:30 5) Jim Kyncy Playboy/K&B .35 ...... 871 Plane & Construction M anuel 3) ArtSuhr 'CURTISS HAWK POE I * STINSON RELIANT SR · ? ...... 3:25 Seal· 04 e"8pen »22.·° V4 Sc«!· 1W Span ·2β·© J'ScW M" 8ρ·η I12.M 2'8c

5) Tim Banaszak Sailplane/Spitfire...... 643 •CURTI88 OULEHAWK1A • · · 3' Se a l· S3- Span 818 <» · Naw V» Sc a le M V Soen 9 3 0 -·° Twin Cyclone/Thor .2 9 ...... 2:44 2) David Brodsky ----- WUJaXJd im V i: δ η .., ,Ο, «>0...— .n· Ha^!^ ------CLASS B CABIN Playboy/Cyclone...... 628 OutMM Ua Md as 00 Maka ■> I erymania la Richard Q. Barron w i h o i w e o m g u v 1) Jay Jackson 3) Edgar Smith Grand Blanc. Michigan 4843© • w u *1 o · for C o m o ·» · kWormaMon Dodger/Torp .29...... 8:20 Gladiator/Cyclone...... 554 2) Bruce Norman Clipper/McCoy .29...... 7:50 3) Bruno Markiewicz Authorized- FA CTO Ft Y A UTHORIZED SER VICE Boomerang/O.S. .20 Cv...... 7:32 4) Larry Boyer FOR ALL OF THE FOLLOWING BRANDS Clipper/Torp .29...... 7:27 (Radio 5) Leon Nadolsky Ace* Cannon Cirrus EK Logictrot Cabin Ruler/Ohlsson .23...... 6:35 Q ontrol Pro Line* Math as* RS* Micro Avionics Orbit D & D World Engines RADIO CONTROL Royal Simprop K raft* JoM ac CLASS AGLOW s e r v i c e 1) Ross Thomas •ALSO WARRANTY SERVICE Playboy/K&B .19...... 1076 2) Don Bekins EXPERT SERVICE ON ALL BRANDS Zipper/Cox .1 5 ...... 813 3) James Robinson Don McCarthy a Factory trained technicians with over 9 Dodger/S.T. .15...... 222 15 years in Radio Control Electronics. CLASS B GLOW 1) Don Bekins Playboy/O.S. .3 0 ...... 1145 Hours: Closed Sun & Mon; Tues ■ 10 am—8 pm; Wad —Fri · 10 am—6 pm; Sat · 10 am—2 pm 2) Joe Beshar (714) 638-8886 915 N. MAIN ST., ORANGE, CALIFORNIA 92667 ? ...... 914

NOVEMBER 1979 107 INDYR/C SALES. INC. 10620 N. College, Indianapolis, In. 46280

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Discounts COX SPORTAVIA R.T.F. Powered sail plane w/.049 GOOD THRU 11 25 79 RA 1204 FM CX R311 engine with Cox/Sanwa No. RA 1207 Lamborghini INOY FLITE PANEL 8022 S.S. radio. 1 can No. Combat Vehicle . 84.98 67.95 Cheetah...... 89.98 71.99 L i s t ...... 36.95 500 flight fuel and 1 Sure SPECIAL ...... 24.00 Save 40% Starter No. 760. List...... 251.05 SPECIAL ...... 138.08 OS 15 R/C W/M L i s t ...... 42.00...... 42.00 A SPECIAL ...... 31.08 Save 30%

Send for IN DY'S RA1003 Tyrrell P34 MARTINI PORSCHE Six Wheeler .... 77.98 59.50 No.935 Tuibo. . . 77.98 59.50 NEW HOT S T U FF Instant bonding cyanoacrylate ■ v " CATALOG

CRAFT-AIR FIELD BOX ϊ a “ jtz $ 1 .0 0 Polyethelene/ready to utc L i s t ...... 29.95 K R A F T 5 CH AN N EL or F R E E with order SPECIAL ...... 20.97 Save 32% COMPETITION SERIES '79 Dual or Single Stick RA1201 Porsche (Limited Quantity) 934 T u rb o ...... 74.98 57.00 V* List...... 389.95 Normal Indy Price. . . .305.00 SUPER SPECIAL _____ 249.95 With 1 extra servo . . . .277.00

3EROBEE CARS

CA R S WITH RA D IO S Save 50% M K 8B ...... 185.00 148.00 Challenger . . . 195.00 156.00 AlfaHJ>...... 250.00 199.95 % Š Ě Ě ORLINE OS 60 FSR 12V GEL & NICAOS V e n e ...... 225.00 179.95 w/Pump and Carb RA 1206 Porsche SOPWITH PUP .60 High capacity Indy 12V/6 amp (Limited Quantity) 936 T u rb o ...... 68.98 55.00 CARS LESS RAOIO L i s t ...... 119.50 hour get cell. List...... 166.00 M K 8 B ...... 60.00 46.50 SPECIAL ...... 71.70 SPECIAL ...... 112.88 List...... 29.95 Challenger . . . .70.00 55.00 SPECIAL ...... 21.95 Alfa ...... 125.00 96.50 obuitachLPSOOS HP Λ 24-hour Charger V e n e ...... 100.00 77.95 NEW IMPROVEO! List...... 19.95 Save 33% MK HAND F U E L PUMP SPECIAL ...... 15.95 Save 40% Especially designed for These are new G .E. A A 450 fuels containing nitro. pen cell nicads with tabt Lots L i s t ...... 10.95 of (4) ea. S1.85 - S7.40: (8) SPECIAL ...... 5.47 ea. $1.70 - $13.60: (12) ea. RA 1205 Lamborghini $1.60-$19.20. Countach LP 500S77.98 59.50 RA1206 Lamborghini Competition. . . . 89.98 71.99 Ferrari R/C Electric Car Save 37% SIG KO UGAR L. 119.95 ...... 1. 89.95 L i s t ...... 47.50 COX CESSNA CENTURION SPECIAL ...... 31.83 Save 40% W/engine and Cox/Sanwa S.S. No. 8022 radio. 1 can No. 500 flight fuel and 1 No. 760 Sure Starter. Prices subject to change L i s t ...... 230.55 SPECIAL ...... 138.33 without notice CIPOLLA .09 R/C MARINE Complete w/flywheel, muffler and water cooled head. L i s t ...... 39.98 SPECIAL ...... 28.95 C R A FT AIR BMW 3.5 C .S.L. Electric Car H.D. HiStart M R C T R A N S AM L. 119.95 ...... 1. 89.95 List...... 49.95 ELECTRIC CAR W/RA0I0 SPECIAL ...... 31.47 L is t :...... 72.95 Lamborghini R/C Car& Radio Save 35% SALE ...... 43.77 L. 1 2 9 .9 5 ...... 1. 99.95 CALL 1 ■ ---- TO LL FR EE INDY R/C SALES, INC. 10620 N. College, Indianapolis, In. 46280 CIPOLLA-MASTERS 1-800-428-4682 3.5 R/C Marine Complete $1.50 handling on all orders. Prepaid domestic orders postpaid, w/flywheel and water MARK'S MODELS SULLIVAN STANDARD foreign orders allow S10.00 (excess refunded). Orders check, M. 0 WANDERER 99 STARTER cooled head. or C.O.D. Also, BankAmericard, Visa, or Master Charge (bank L i s t ...... 38.95 List ...... 69.95 L i s t ...... 35.95 number). Indiana Residents add 4% Tax. S P E C IA L ...... 23.76 SPECIAL ...... 45.98 S P E C IA L ...... 23.37 ANTIQUE 1) Bruce Norman Dallaire/O.S. .60 ...... I860 0^ JOHN POND ^ 2) James Buice Cumulus/Fox .45...... 1492 3) Karl Tulp Dallaire/O.S. .60 ...... 1448 Old Time Plan Service 4) Don Bekins The largest selection of plans in the world at the most Gas Bird/Merco .60 ...... 1116 5) Jim Kyncy reasonable prices. Each list 75c Lanzo/HB .50...... 1088 No. 10 OLD TIMER F/F GAS ELECTRIC 1) Lawrence Bekins No. 10 OLD TIM ER RU BBER /TO W LIN E Playboy Cabin/Astro 15...... 889 No. 10 OLD TIMER FLYING SCALE A through K 2) Frank Tulp No. 10 OLD TIMER FLYING SCALE L through Z Playboy Cabin/Astro 15...... 631 3) Ross Thomas P.O.Box 3215 Eaglet/Astro 1 5 ...... 32 .020 REPLICA San Jose, Calif. 95156 1) Jack Jella Phone (408) 292-3382 Clipper II ...... 390 2) Ed Solenberger spot the weather? morning thereafter. He was an invalu­ Strato-Streak ...... 285 Winner Bruce Norman used a Dallaire able aide to Doug Gorton and was 3) Don Bekins Sportster to win Texaco. Interestingly completely unmentioned at the awards. Playboy...... 186 enough, this design has won the Texaco Now you know how it feels to be an 4) Barnet Kernoff event at the SAM Champs for the last unsung hero. Bill!! Playboy Jr...... 102 three consecutive years (wanna surefire Well, that's about it this time. Next TEXACO winnah?). O.S. .60 four-cycle engines month, we'll talk about the Old Timer 1) Bruce Norman are almost an absolute must for the events at the AMA Nationals. The sched­ Dallaire/O.S. .60 4-cycle...... 1249 Texaco event, with most fellows getting ule shapes up like this: Wednesday, 2) Bob Von Koňsky three to five-minute engine runs. Al­ three R/C O.T. events: Thursday, two Boehle/O.S. .60 4-cycle...... 1056 though glow powered models can climb control line events: and Friday, the big 3) Jim Kyncy to the same height in a minute and a half, day, will feature eight events. Quite a Gas Bird/O.S. .60 4-cycle...... 1053 they are down by three and a half variety of events!! · 4) Ross Thomas minutes to the four-cycle engine. The Eaglet/O.S. .60 4-cycle...... 785 biggest advantage the glow powered 5) Don Bekins models have is that they can climb Gas Bird/O.S. .60 4-cycle...... 774 quickly to a thermal spotted overhead. A. J. FISHER INC. FIELD PICKUPS On the other hand, the four-cycle This SAM Champs being the first in the model can cruise longer in search of Manufacturers of Quality Scale Brass Ship and Yacht Salt Lake area, many varied comments thermals. As writer Caldwell used to say, Fittings Since io 2S were heard. Among those were: (Sal "You pays your money and takes yer Plan· - Fitting· - Kit· - Book· Taibi) “ I never worked so hard to win a choice.” ILLUSTRATED CATALOG, S2.00 trophy in my life.” (Herb Wahl) ” 1 flew Karl "Baron Von Bearing" Spielmaker all models, they flew good, but not good showed up with a Buzz .60 engine, a real enough. I zilched.” (Barnet Kernoff) rare one. Karl put one of his timers and a "Smoothest air I have ever seen. Not a tank on the basket case and whadya bump in a carload." know . . . it ran!! To show how much With everyone moaning about the power the engine developed (for a shortage of maxes, Bruce Norman came slag engine), the motor was installed in over from the free flight area twice and flew a Buccaneer C Special. around four o’clock on Wednesday and Almost forgot to mention the unselfish Thursday and proceeded to win both work of Bill Brenchly, former SAM 21 the Antique and Texaco events. The member, who moved from Santa Cruz Antique event was won by three perfect to Logan, Utah. Bill showed up bright ZIP - 48067 flights. Maybe it takes a free flighter to and early Tuesday morning and every

ALTHOUGH INTERESTS MAY VARY HOT STUFF ALWAYS AVAILABLE AT YOUR HOBBY DEALER

SATELLITE CITY P.O. Box 836, Simi, CA 93065 * Phone (805) 522-0062

WORLD SEND S.A.S.E. FOR FREE TIPS TEXT AND ILLUSTRATIONS The "HOW TO" & "NEW IDEAS” Booklet

NOVEMBER 1979 109 R/C Old Timers. For example . . . our Sal Taibi-de- signed Powerhouse O.T. weighs 5-1/2 to 5-3/4 pounds (no two scales are alike). With an 84x14 inch wing, the area is over 1100 squares, and with a K&B 40and 11x4 prop, it will climb at a 60-degree angle until it’s out of sight, if allowed. Now try to tell us that a 9-foot J-3 Cub would need more than a .60 to fly properly! Many of Bud Nosen’s big models have been proving that for years. So . .. perhaps it’s time again to make W-1 . . . $59.00 W-2 . . . $119.00 the pitch for Mammoth Classic Scale. The aircraft and engine specs are fairly • Custom R/C design for all boat sizes · Power - 40 in. lbs. »Travel simple, but modified a little from the time · 5 seconds «Voltage · 4.8-6 (W-1) »Size -2x2x5 inches. January 1977 suggested rules, based on The Probar W-1 is mechanically operated by a separate, neutralizing some things learned in the meantime. servo. The Probar Propo W-2 is designed to plug directly into the receiver, 1. Models shall be large scale repro­ and requires no extra batteries. Specify Kraft, Futaba, or no connector. ductions of successful man-carrying Both winches are fully assembled and tested, ready to install. AH mounting aircraft of the 1918-1941 Classic Era, hardware, switch pushrod (W-1 only), and winch arm blank are supplied. employing lightweight rubber scale model type, open construction. STAINLESS STEEL HARDWARE: MISCELLANEOUS ITEMS: Turnbuckles, Chainplates, Goosenecks, Sheet exit guides, 3owsie, 2. Maximum total engine displace­ Boom vang pivots. Pad eyes, Tangs, Rudder posts. Mast head ment shall not exceed 1.2 cu. inches. Deck cleats. Boom cleats. Rigging wire, fitting. Dacron sheet line. 3. Minimum prop diameter on en­ Dealer inquiries invited gines over .60 cu. in. shall be 16 inches. PROBAR DESIGN P.O. BOX 639 ESCONDIDO, CA. 92025 4. Minimum prop diameter on en­ gines over .80 cu. in. shall be 18 inches. (The above prop specs serve to permit the use of engines larger than .60 where f * EXACT MINIATURES R/C World . . . Continued from page 13 big props are required in order to clear SCALE SHIP ACCESSORIES cowls and wide fuselages, but to prevent modelers, and the “ penetration poten­ full power development from smaller 10HOGAN Y tial” when they get in the air is frighten­ props.) STRIPING ing, especially in the hands of an inex­ 5. Belt and gear drives are permitted. perienced R/C pilot. Hopefully they are 6. Any scale is permitted, but the ANTENNA BRACkf-rTVS&EMBLY a fad that will disappear from the scene minimum wing area shall be 1200 for s3-BLA[>E PROPS before they cause real damage and monoplanes and 1800 for biplanes. create bad publicity for modeling. 7. Regardless of scale chosen, all s h a f t Tn g The point is this. We can build and fly primary components of model (wings, large model aircraft without going over­ tail surfaces, fuselage width and profile, p r o p s t ó Ts K c íÁ l O R D ER board on power and weight. Unfortu­ etc.) must be to the same scale. nately, the powers-that-be, AMA to be 8. W eight, ready to fly, but with Deafer Inquiries Invited exact, is too timid to step in and specify empty fuel tank, shall not exceed 15 reasonable absolute model aircraft pounds . . . period! BOX 402 PRICE LI limits. By absolute limits, we mean limits As has been learned at several large- OXFORD, MD. 50 Cents which apply across the board, regardless scale fun-flies in the last couple of years, 21654______of individual event rules. Anything the novelty of big scale models can soon heavier or powered by larger engines wear off if you do nothing more with the than specified would be out of the models than putt around the sky looking model category and would come under realistic. On the other hand, not many jurisdiction of the FAA. That we can fliers would care to attempt unscale-like build and fly big models without going axial rolls, consecutive loops, inverted overboard on weight and power has flight, and other undignified maneuvers been proven by the big fuel-allotment seldom attempted by Classic aircraft. (OK, so a Bucker is classic. Enter it in Sport Scale!) So, what do you do with YE 8 -8 IR. Y E 8 - 8 IR. THREE BAG8 F U L L ! ^ that Mammoth Classic Scale ship? At a typical full-scale antique and classic aircraft fly-in, no one is expected to subject their prize possession to the unsafe stresses of unusual maneuvers. Instead, the fun-like competitions, to give the owners a chance to show off their classics, are limited to fun-like events . . . short takeoffs, spot landings, slow flight, flour bombing, message WALT MOONEY NOW OFFERS 3 BAGS OF PEANUT SCALE PLANS drop, etc. ALL WELL TESTE0 DESIGNS, AT ONLY tS.OO EACH Here are some suggested tasks that EACH BAG FEATURES FOURTEEN PEANUT PLANS, could be flown at random during a ONE OTHER, PLUS PHOTOS AND INFORMATION gathering of Mammoth Classic Scale enthusiasts. SENO tl.00 FOR COMPLETE LISTING ΑΝ0 SAMPLE PLAN TO: 1. Shortest takeoff. From a starting WALT MOONEY, 29I2 CABRILLO MESA OR. line, measure to point where last part of SAN DIEGO, CALIFORNIA B2I23 aircraft leaves the ground. 2. Spot landing. Measure from spot to

110 R/C MODEL BUILDER first contact point of any part of aircraft .40! — (hopefully the wheels!). Other projects in the wind include 3. Parachute and/or bomb drop. our Assistant Editor Phil Bernhardt's The OCTURA CONNECTIONHhe Measure from target to point of contact. 3-1/2-inch scale Aeronca C-2 from Paul Drop should be from at least 100 feet of Matt plans, and Le Gray’s "Wimpy,” altitude. using plans blown up from Walt 4. Three-minute precision. Time from Mooney's 1/2A free flight version pub­ K E ΐ H E X takeoff to touchdown. Need not be lished in M.A.N. some years ago. The deadstick. Think that makes it easier? Try Wimpy, a Les Long homebuilt design, flexible shaft coupler it! Spot landing could be included. spans 8 feet and is powered by an Astro 5. Duplicate pylon time. Establish a 25 with belt-driven prop. By the time base time for five laps around a typical you read this, we may have the complete 3-pylon course, any size. Make up to 3 construction article, ready for publi­ subsequent attempts to duplicate the cation. base time, without any means of telling Hmmm . . . maybe we better finish up time. Speed is not important, but con­ that 9-foot C-3 that’s been in the works sistency is. for better than 10 years. . . 6. Slow/fast flight speed ratio. Best MY FIRST R/C score is greatest difference between "Dear Bill, slowest and fastest time between two “ Your article in the June issue of markers spaced about 200 feet apart. RCMB re your first R/C being a Royal For the more adventuresome, there Rudder Bug really sprung the memory can be additional events for balloon switch. bust, ribbon cutting, hankie pick-up, "My first R/C was also a Royal Rudder etc. Bug, also completed in 1955. Power was Note that static points are not brought a K&B 19 (it worked better upright), a into these rules whatsoever. In our Lorenz 2-Tube receiver was suspended The Octura Flex-Hex Coupling lor flexible opinion, these models should be judged on gum bands in the center of the cabin, shafts uses an interchangeable collet, (available lor .250. 187, 150 or 135 on flying only; the scale requirement is and those pounds of batteries! Also, diameter cable) to hold the cable securely to qualify the model for competition, please note the upright antenna. without traying the end as with sel screw and has no effect on the final results. "Every time I see a modern Cessna in connectors. Available to tit y„-24, Ά-28. OK, Claude? Scale models, but no static the air, I can’t help but wonder if the 7mm or 6mm threaded crankshatts. When points! designer flew one of these things.. . ordering specify thread and collet sizes Order directly only it not available at your local hobby Perhaps the main reason that our "You’ve got a great mag. Keep up the dealer — add 10% tor postage Illinois residents add original MCS concept didn’t take hold good work. John Martin. additional 5 % lor sales lax was the lack of specific construction "P.S. I sold it at Xmas time in 1959 and Sena 50c lor catalog and price list to: OCTURA MODELS, INC. projects that could prove the point. bought a top coat which lasted almost as "Celebrating our 25th year1" Within the next few months, we will long as the plane.” 7351 N. Hamlin Ave » Skokie. IL 60076 publish plans for our own MCS aircraft T-TOP AIRCRAFT CARRIER (if we wait until the model is finished, One photo this month shows our 1972 attention! you may never see it!). It's a Boeing 95 Corvette with an unusual load on its Nautical nuts may enjoy the play on Mailplane (bipe, natch!) blown up from luggage rack. When Walt Schroder’s words. A Corvette is supposed to be a Cleveland 1/2-inch Dwarf series plans. Byron Originals Pitts arrived in its huge sloop of war or a small destroyer, but in At 2-inch scale, the top wing spans 88 packing crate, we unpacked it at the this case, it’s an aircraft carrier. . . Actu­ inches with a 14-1/4-inch chord. That’s office and figured to stick it into Walt’s ally, the whole idea is the Pitts! · not much larger than the Powerhouse big Chrysler Cordoba. Forget it, Ricardo, wing. As the Powerhouse weighs less neither the trunk, the back seat, nor the Counter...... Continued from page 10 than 6 pounds, we see no reason that the front passenger seat with the back Boeing can’t come in under 10 pounds, dropped would accommodate the Pitts 9), plus two complete AMA’s and, as maybe even 9. We have to allow for fuselage with tail surfaces and landing stated on the fact sheet that came with heavier wheels, strut rigging, more gear attached. our sample, "enough blank space to hardwood reinforcing, etc. The plan is to Unable to convince Walt to tie the tail custom cut letters of your own choice.” use a break-away type phenolic or wheel to the rear bumper and trailer it Don't get too excited about that last aluminum plate engine mount so that home, we set it on our little Corvette, point, however. The blank space on our various displacements and prop sizes placed a small pillow over the aft fuse­ sample sheet (the 2-inch size) measured can be tried. Remember that 60-degree lage, and cinched it down with a bungee- 2-1/2x3-1/2 inches, so if you are thinking climb on the Powerhouse with only a cord holder. Now there's a way to attract about cutting out the name “ Rumpel-

T 2 8 -B Plenty ot dihedral (7°) tor lateral stability Radial cowl prevents speed buildup in a dive Large stabilizer and long tail moment give wide CG position tolerance Special airfoil and washout maintain stability down to a very low speed Tricycle LG makes good rough-ground handling and easy land­ ings. Bright color schemes help pilot orientation in flight INNOVATIONS Large flaps incorporated in basic design Over 700 sq IN MODELING ins. for light wing loading even when loaded with options 2657 N E l88lh Street Kit features: Our now-lamous detailed plans (2 sets) IWami Florida 33180 showing flaps, retracts. RC equipment etc Beautiful ons.iJTK 3-sheet detailed fuelproof decals Machined & diecut balsa, formed wire Nylon fittings (flap hardware included), canopy and ihe best cowling ever put in a kit Span 63', Area sq ", 4 to 6 channel Engine 60

111 NOVEMBER 1979 IN STOCK FOR IMMEDIATE SHIPMENT head. A sort of 90° bellcrank with two extra legs is mounted over the switch, VINTAGE R-C PLANS Q U A D R A S **7.6o the two two legs straddling the switch QUADRA REPAIR · $10.00 olus parti knob. As can be seen in the photo, the ZINGER & TOP FLITE Props - 10% OFFI legs push the knob from side to side Jim Masaar's ERCOUPE KIT - $195.00 when the wire is pushed or pulled. Simple, quick, and inexpensive . . one BARKLEY’S TIGER MOTH- $249.95 CONCEPT'S BIG FLEET KIT- $179.95* of these little goodies will set you back a (* 6" Du-Bro whit., a $15.95 value, whole 98 cents. QBH To get a catalog listing all sorts of other 1/4 SWAI_L· SUPER CRUISER” FREE with kitt bought from ut) 9 f T. WING SPAN 1/4-SCALE PLANS (for Quadra) interesting items, write to Rosie’s R/C ■> LARGE PLAN SH TS.- PLANS $ 20.00 STEARMAN BIPE. ERCOUPE Products, 3501-B West Moore St., Santa QUADRA OR GLO ENGINES ADO $ 2.00 POSTAGE $20.00 par sat. Ana, CA 92704. 24-Hour Service. . . Add $ 2 0 0 postage * * * Send Bank Check or Money Order to: CATALOG-OVER 50 PLANS 50$ DEALERS WRITE JIM MESSER'S C.B. Associates is cranking out all sorts S ID M O R G A N QUALITY MODEL PRODUCTS of good stuff for Mammoth Scale and other big models. Most impressive of 106 Valley View Dr., 13157 Ormond. Belleville,Mich.48111 u s .a the lot has got to be the monster 1/4- Allegany, NY 14706 scale tailwheel assembly, which comes stiltskin” for your new ship, better forget completely assembled and features a 2- it. On the whole, though, we have tosay field. Could it be that modelers need to inch DuBro low-bounce wheel. There that Graphics look like an excellent be reminded from time to time of some are four spring steel leaves, each one product and should be just the thing for of the great products in this hobby/sport 1/16 of an inch thick. The steering arm is getting professional-looking results in a of ours? Maybe so. At any rate, one of the two-arm type with a spring at each minimum of time. the items that fall into this category is the end for attaching to the rudder control Graphics are available at your local Bulkhead Switch Mount from Rosie's horns. The assembly mounts to the hobby shop or from Coverite, 420 Baby­ R/C Products. This clever little device model with two No. 1Ó bolts and weighs lon Rd.. Horsham. PA 19044. was designed for those who prefer to 4-3/4 oz. It looks to be very substantial mount the radio switch inside the model and should be just the thing for ships * * * and operate it via a wire through theside such as the Ag-Cat featured in the Once in a while we come across some of the fuselage. No modification to the December 78 MB. or maybe even a super-neat modeling item that has been switch is necessary; just mount the taildragger version of the Big Stik in last on the market for some time, yel is switch in place on the bracket, then bolt month's issue. Retail price is $19.95. seldom mentioned or seen at the flying the whole thing to a convenient bulk­ Next up are some really big elevator

Span: 50" Area: 425 sq. in. Engine: .15 to .25 R/C Functions: Three or Four Channels

50L213-Ace Alpha 15 l· MPIHI&1S $39.« Designed by Tom Runge

A big brother to the Alpha, the Alpha 15 is a sturdy, easy to uuild, rock stable trainer/sport plane for three or four channel control and a .15 to .25 engine. On a .15 this plane will easily take off of grass and has plenty of power for loops and rolls. It doesn't have any bad spin or snap roll tendencies and has excellent slow flight characteristics. Plywood fuselage and built up wing construction is featured for sturdiness and durability. Even at the reasonable price, the kit contains complete hardware: steerable nose gear, formed main gear, all control linkage and hardware; all you need to complete the model is tools, glue, finishing material, engine with mount, tank, wheels and radio. A perfect full house trainer/sport plane!

Pinse send me your complete catalog. Enclosed is $1.00 which is refunded on my first order. (Add $.50 for 1st class mail return, add $1.00 handling on all other .orders.) STATE BOX 511D, HIGGINSVILLE, MO. 64037i

112 R/C MODEL BUILDER GIAIMT 'Scale!

QUARTER SCALE BY POPULAR DEMAND (3" = 1 FOOT) • STANDARD PILOT COMPLETE WITH GOGGLES • VICKERS PUSTÍC MACHINE GUN KITS • GNOME ROTARY ENGINE CYLINDERS J Å l L U A m • VINTAGE WHEELS, 6% " DIAMETER ^ BROS. i n c > - - SEND 50* FOR COMPLETE CATALOG · DEPT- MB .181 PAWNEE ST., SAN MARCOS, CA. · 92069 and rudder control horns (would you Sonic Systems is bringing out a new strips. The span is 72 inches, area is 518 believe 1-3/8 inches from the base to the air-operated retractable landing gear sq. in., length is 36 inches,and uses .09to outside hole?) They are molded from that looks to be very nicely designed and .15 size engines (we’d opt for the .09 for a glass-filled nylon and come two to a built. They’re called “ Turfmaster'' re­ beginner). Flight controls are rudder package for 95 cents. tracts and feature two pneumatic cylin­ and elevator; throttle control is optional Big bipe builders (try saying that ten ders in each individual retract mecha­ but recommended. times fast with a mouth full of saltines) nism, one to bring thegear upand down Introductory price of the T.N.T is should consider C.B.’s new Wing Strut and the other for locking the gear in the $32.95. For more info, contact Master Fittings for mounting the interplane up or down position. The system in­ Kit, 6 Fox Rd.. Plainville, CT 06062. struts. Everyone seems to have a differ­ cludes an adjustable onboard pressure ent way of mounting struts, but this has regulator which eliminates slamming to be one of the simplest (and safest) when the gear is operated, helps elimi­ Dunham's R&R is introducing its new methods we’ve seen. Each assembly nate high pressure leaks and line blow- D-8 heavy-duty servo, designed espe­ (there are four complete assemblies in a offs, and reduces wear and tear on the cially for large models and other high- package) consists of a steel strip that is to gear and airframe. The mounting holes load applications. Actually, it's not a be solidly mounted in the end of the are interchangeable with Rhom retracts. complete servo, just the case and servo strut, and a glass-filled nylon base, which As mentioned above, this unit works on mechanics; you have to supply your is mounted in the wing with the top half compressed air; no special gasses are own motor and electronic guts. The case protruding above the covering. A bolt is required. measures 1-3/4x15/16x1-5/8 inches, used to hold the strut end to the base. The Turfmaster main gear retract which really isn't too big for a heavy- Nothing could be simpler! Of course, system retails for $89.95, and the trike it’s a pain in the tail to have to fool with gear set is $119.95. You can find out more those bolts every time you assemble and from Sonic Systems, P.O. Box 192, Whip- f i \ d P 9 9 disassemble your ship, but most biplane pa ny, NJ 07981. HIRT enthusiasts will agree that owning and * * * flying a two-winger is well worth the Latest piece of electronic wizardry added effort. A package of four Wing from L.R. Taylor & Co. is the Accu- Strut Fittings goes for $3.95. Charge, a charger designed for 12-volt, 4 Number four on the list of new C.B. to 6-amp wet cells or gel cells. The Accu- products is a multi-purpose universal 3- Charge puts out .5 amps, which is the prong bellcrank, also molded from maximum safe charge rate for these glass-filled nylon. It can be used for batteries. It’s also voltage regulated, cable control systems, reversing control automatically going into what the manu­ direction, making 90° changes in push- facturer calls a “ float mode” once the rod direction, etc. It comes with a nylon ME AND MY RC battery is fully charged. bearing and mounting hardware, for 4 COLOR The Accu-Charge sounds like a bar­ $1.50. (EXCLUSIVE RIGHTS gain at $24.95. Contact your dealer or FROM ROYAL CROWN COLA) Last on the list is an item we somehow order direct from L.R. Taylor & Co., managed to leave out when taking Your choice p l a n e 20831-1/! Roscoe Blvd., Canoga Park.CA photos for this column, and that is a b o a t c a r on poly FLI CAP 91306. ester/ cotton T-shirt cable pulley and mounting bracket for With cable control systems. The bracket is * * * glass-filled nylon (what else?) and the Its performance might not be dyna­ AMA WINGS AMA Wings pulley is machined from aluminum. The mite, but they decided to call it the 4 COLOR O.D. of the pulley is about 15/16 of an “T.N.T.” anyway. “ T.N.T.” stands for (PERMISSION FROM AMA) $6-50 inch, and the edge of the pulley is close “The No Tow,” which is the name of a Size S, M, L, XL + 50c Postage enough to the edge of the bracket that slick little powered glider being kitted the cable will not jump out of the slot by Master Kit. The airplane wasorginally when there is slack in the line, such as designed by Bob Wallace and was fea­ We do custom work for clubs, when disassembling the model for trans­ tured as a construction article in the special events, businesses porting. The cable pulleys come in a June ’77 issue of RCM. The construction Information sent on request. package of four for $4.25. has been changed slightly in various places to make kit production more All of these items are products of C.B. d ( ? Associates, 21658 Cloud Way. Flayward, practical; otherwise it’s the same good- ř-LI 9HIRT9 CA 94545. flying trainer it was designed to be. The airplane has a built-up balsa fuselage, 5132 DEL REY · LAS VECAS. NEVADA * * * flat-bottom foam core wing with leading (702) 878-1624 89102 and trailing edge sheeting and false cap

NOVEMBER 1979 113 ANEW ERA PUBLICATION which make use of Robart’s exclusive AEROBATIC AIRPLANES toothed trim arms. The Differential Bell- new releases- BY ROB’T. C. MORRISON crank is great for getting more control Bueker movement in one direction than the JUNGMEISTER INCLUDES other, such as when you want more up 11/2 radio control IB SCALE DRAW INGS! than down on the ailerons or elevator. scale 2-3 channel ■"γ $ 3 .9 5 PLUS sod POSTAGE You can also place the arms 180° apart to change servo direction. The interlock­ I CATALOGS $ l.oo | ing teeth on the trim arms assures a no­ by slip assembly. The spindle that the arms 33" wingspan, FOR ANYONE lock onto has a large bearing area for FASCINATED BY AIRPLANES .049 power, $18.95 don srull high strength and virtually no slop. Four mounting screws and a nylon nut plate great tor schoolyard scale are also included. This bellcrank looks like a very handy device and should find TRAVEL AIR a myriad of uses by modelers. Retail *6000' price for a package of two is $2.49. Next up is a Feed Thru Bellcrank, 48600 MCKENZIE HWY. which is designed for getting the control VIDA, OREGON 97485 .020 or rubber linkage outside the fuselage or boat herb cluke'v radio box. It is claimed to be sealed to oil power For the waterproof option, add $1.95 or water and, like the Differential Bell­ 36"span each. From Dunham’s R&R, 1100 North 1-2 channel R/C or free flight. $14.95 crank mentioned above features inter­ Lake Havasu Ave.. Lake Havasu City, AZ locking teeth on the spindle and trim 86403. arms and is totally adjustable. The Robart Feed Thru Bellcrank goes for It’s a well-known fact among R/C $1.98 each. boaters that “success and enjoyment are The third new item isa Dual Trim Arm, inversely proportional to the Η 2O in the which can be bought to fit just about any 23"wingsp< radio.” Of course, the best way to keep servo you care to name, including some o e a g u u for rubber < water out of your waterborne R/C that are now out of production. The C 0 2 power available soon. system is to put everything in a water­ adaptor and both trim arms have those S E E YOUR send 25< for proof box, but then you have the prob­ interlocking teeth, so that each arm can DEALER NOW catalog lem of how to get the pushrods to come be separately adjusted to any operating out of the box and maintain free move­ angle desired. FLYLINE MODELS, INC. ment while going through some sort of Since no two brands of servos seem to m o OO·» AVI HVK ( · 14 U iH lI nlCiHlt ito· ir*n vr> tom waterproof seal. Various types have have the same size spindle end, the been tried with varying degrees of Robart adaptors are color coded, the duty servo like this. The gear train success, but as far as we’re concerned, colors depending on which brand and features one of the thickest output G&M Models has the problem licked type of servos you are using. Two com­ gears of any servo currently on the once and for all with its beautifully made plete Dual Trim Arm assemblies (two market. Other features are wheel and seals. They are made to be bolted to the adapators, two screws, and four arms) adjustable arm outputs, reinforced side of your radio box and provide a very sell for $1.98. mounting lugs, and the ability to accept smooth, yet totally waterproof seal. A All from Robart, 310 N. 5th St., St. standard 20mm motors. Servo neutral package contains 3 seals, 3 mounting Charles, IL 60174. · position can easily be adjusted external­ studs, 3 packing nuts, and 2 stainless ly. Amplifier space is .8x.8x.6 inches .. . steel pushrod ends. In addition, there is F a n ...... Continued from page 45 enough room for most servoelectronics. an instruction sheet that gives an excel­ Waterproof seals or ball bearing lent and very detailed description on >*=wing velocity in ft./sec. outputs are available as options on this how to build a waterproof box. S = wing chord length in ft. servo. With ball bearings, the output Unfortunately, we didn't get a price ~V= kinematic viscosity of air = .1572 * gear is supported so that vibration and on the G&M seals, but if you’re inter­ 10 J ft.Vsec. @ sea level. the heavy loads associated with mam­ ested you can write to G&M Models, Rewriting the equation for mph and moth models do not cause servo dam­ P.O. Box 342, Broadview, IL 60153. chord in inches gives: age or decrease efficiency. RN = 775VmphJf' , where The D-8 servo mechanics, less options, / = wing chord length in inches are available now for $11.95 each. For Robart has some neat new linkage Application of the Reynold’s number the ball bearing option, add $3.95 each. hardware on the market now, all of formula to the tip section of a whirling rotor gives the following equation: (Eq. 5) RN = 4.624 RPM Ct Rt s i w m w m w w w tte ^ m RPM = rotor RPM Fiberglass Competition Deep Vees Rt = tip radius in inches for 6.5cc and 3.5cc engines Ct = tip chord in inches. Another item of interest is blade tip IMPBA and NAMBA LEGAL Mach number, which is: RACE PROVEN! M = V tip/K so und = .00872RPMxRt/ 1116 = 7.81 RPMxRt x 10 6 Table I shows some calculations of tip Reynolds’ number for typical applica­ STREAKER LI'L STREAKER tions of both my RK-049 and RK-40 39.3" long, 10.5" wide 32” long, 10” wide for 6.5cc engines for 3.5cc engines AXIFLO ducted fan rotors. 5" motor mount spacing 4" motor mount spacing The RK-049 rotor tip Reynolds’ num­ uses #66 hardware set uses #67 hardware set ber is quite low, being in the critical range less than 75.000, while the RK-40 Steve Muck's Ft/C Boats, 6003 Daven Oaks, Dallas, TX 75248 (214) 661-1572 has moved safely out of that range. There are two rather bad aspects of

114 R/C MODEL BUILDER Ace Radio Control, Inc...... 112 INDEX TO ADVERTISERS Polk's Hobbies...... 97 Aeromarine Enterprises...... 102 Gemini Models, Inc...... 117 John Pond O.T. Plans...... 109 Aldrich Model Products...... 100 Giezendanner, USA ...... 92 Probar Design...... 110 American R/C Helicopters...... 71 Gorham Associates...... 104 Proctor Enterprises...... 97 Astro F lig h t...... 84 H.R.E., Inc...... 90 Pro Line Electronics ...... 98 Authorized Radio Control...... 107 Hobbies + ...... 106 Quarter Headquarters...... 101 Avionics International...... 100 Hobbypoxy Products...... 94 Radio Control Buyer's Guide...... 78 Barron's Scale C la s s ic s ...... 107 Hobby Shack...... 77 Repla-Tech International...... 114 Bavarian Precision Products...... 86 Indy R/C Sales ...... 108 Rosie's R /C ...... 98 Bridi Hobby Enterprises...... 87 J & Z Products ...... 72 Satellite City ...... 109 Byron Originals ...... 118-119 J-5 Enterprises...... 106 S.C. Modeler...... 105 California Hobby Distributors ...... 91 JoMac ...... 95 Sig Mfg. Co...... 5 Cannon Electronics...... 102 K & B Mfg. Co...... 1 Bob Smith R/C Aircraft...... 99 Carr S a ils ...... 117 Kraft System s...... 3 Oba St. Claire...... 98 Cass Engineering...... 88 K & S Engineering...... 103 Sterling Models ...... 85 C o verite...... 96 Kustom Kraftsmanship...... 104 Sullivan Products...... 101 Cox Hobbies...... 4 Majestic M odels...... 100 Tower Hobbies...... 80. 81.82. 83 Craft-Air, Inc...... 75 Jim Messer's Products...... 112 Uber Skiver Knives ...... 120 Jim Crocket Replicas...... 104 Micro-X Models ...... 107 VL Products...... 117 Curacao Modelbouw...... 84 Midwest Model Sup p ly...... 88 Charles Werle...... 94 DuBro Products, Inc...... 79 Model Rectifier Corp. (MRC) .. Cover 4 Williams Bros...... 113 Electrocase...... 76 Walt Mooney Peanuts...... 110 World Engines ...... Cover 3 Exact Miniatures ...... 110 Sid Morgan Vintage P la n s...... 112 C A. Zaic Co. (Jetco Models)...... 90 Executive Engines...... 86 Steve Muck's R/C Boats...... 114 Nick Ziroli ...... 105 FAI Model Supply ...... 106 Bud Nosen Models ...... 73 HOUSE ADS A.J. Fisher, Inc...... 109 Octura Models ...... 111 Fli S h irts...... 113 Pacer Industries...... 89 Classifieds ...... 115 Flyline Models...... 114 Peck-Polymers ...... 117 Oldies But Goodies...... 96 Fox Mfg. Co...... 93 Pica Models...... 111 Plans Service...... 116 Futaba Corp. of Am erica...... Cover 2 Pierce Aero Co. . . \ ...... 72 Binders ...... 117 being in the critical low Reynolds’ number regime: WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 1) The blades may stall prematurely, causing large lift losses and drag in­ creases unless a proper airfoil is chosen. 2) Even if unstalled, increases in profile drag at low Reynolds’ numbers CLASSIFIED ADS cause a loss in rotor efficiency. Fig. 4 illustrates both cases. The drag Non-commercial (personal items) Rate is 25 cents per word wan a minimum of $3 00 polars of the cambered NACA 4409 Commercial Rate is 40 cents per word, with a minimum ol $5 00 No mail-order discount show a degradation in terms of less lift house ads knowingly accepted No advertising agency discounts allowed and more drag as the Reynolds’ number All ads are payable with order, and may be lor any consecuhve insertion period specked decreases from 165,000 to 41,700. The Name and address tree phone number counts as two words Send ad and payment to design C l of the RK-049 rotor tip section MODEL BUILDER Magazine. Classified Ads. 621 West '9th St Costa Mesa CA 92627 is approximately .7, as shown in Fig. 4. While the drag has increased at the WANTED Old-Time spark-ignition model MODEL ENGINES parts, castings props lower Reynolds' number, the airfoil airplane motors magazines and gas powered accessories, stick and tissue gas / rubber kits behavior is still acceptable. However, race cars ol the 1930 s and 1940 s Russell List 25C T Crouss. 100 Smyrna. West considering the drag polar of a symme­ Stokes Rt 1 Box 73J Keller. TX 76248 Springfield. MA 01089 trical NACA 0009 airfoil of the same HELP Old spark ignition & diesel engines thickness distribution as the NACA 4409 WANTED: Old model airplane engines, gas model race cars, kits, magazines, parts needed in good running shape for antique shows a different story. Note that the related items, 1935-55 Arthur Suhr. W218 model flying events. Brown Junior Super lack of camber in the 0009 causes a N5866 Maclynn Court. Menomonee Falls. Wl Cyclone. O&R 60 any twins especially Parts veritable disaster, the airfoil being 53051 needed: Atwood Champion & Merlin B points totally stalled at the design C l. So assemblies Call or write Ron Falk. 5265 McCOY SERIES 21 engines 19. $19.95. Gaylord Dr . San Diego. CA 92117 714/ camber is essential. Fig. 5 illustrates the 272-3783 (SAM »1716) Society Antique loss in rotor efficiency due to increasing 29RC. S31 95; 35RC. $32 95 New World Expert Single Stick radio control with 4 servos Modelers profile drag at low Reynolds’ numbers. $255 Used Ace Baby Twin pulse radio The profile drag increase for the NACA control $50 Smith s Hobby Lobby. 2123 SIG TWISTER completely ready to fly with 4409 is illustrated in Fig. 4. Between the Linda Road, Alexandria LA 71301 Phone Fox 36. lines, handle, etc S70 or best offer two Reynolds’ numbers of 165,000 and 318/443-6510 Greg Harlmann, 301 E Virginia. Santa Ana 41,700, the rotor efficiency would drop CA 92706 Ph 714/547-7959 6%, resulting in a 5.6% thrust loss. WANTED Mattel Vac-U-Form or similar machine — any offer considered — shipping FOR SALE — Large collection of 1930-1945 Happily, the new design RK-049 rotors paid. Carl Silverman, Box 1027. Stuyvesant rubber flying kits. Send SASE. Jerry Antczak. which recently were tested in the A4D Station. New York. NY 10009. 46064 Green Valley, Plymouth. Ml 48170 performed very well in flight at the (313) 453-1809 desired lower rpm. FOR SALE Flying Aces and Air Trails maga­ CARE AND FEEDING OF zines. 1936 to 1950 Send for list Bruce Thompson, 328 St Germain Ave. Toronto. HOBBY SHOP MEET - M E C A COLLEC- THE COX .049/.051 Ontario. Canada M5M 1W3 TOGETHER Got lots of hobby things you Properly treated, the engine is mag­ don't need9 Want to buy engines, kits. etc. nificent. You can hardly fail to achieve FORSTER 99 Less than 2 minutes break-in cheap9 Come to the Μ E C A collectogether outstanding results. Improperly treated, time. Like new Complete with spark plug, — swap-sell-buy Sat.. Oct 27. 1979 Mer­ it will buck like any thoroughbred. dual points. Minus prop nut, front washer Will cury S&L. 4100 Long Beach Blvd Long sell to highest bidder. Victor Zeanwick. 1064 Beach, CA 9a m.-1 p.m. Info: (714)826-0589 For ducted fan applications of the Calvin Ave., Muskegon. Ml 49442 eves engine, certain extra steps are necessary in the installation and flight preparation NOVEMBER 1979 115 FULL SIZE PLANS SERVICE No. 879 0.T.-1 CURTISS F-11C-4 $4.00 No. 479-0.T. TLUSH MITE $2.50 Including reprint of conitruction artid· Reprint of Miniature Aircraft Corp. plans From May 1938 Air Trails, a 4' span gas plus ribs and bulkheads from printwood. model for Atom (!) engines. Frank Tlush. (if any) No. 879-O.T.-2 CHALLENGER $3.50 No. 3791 DUSTER $6.00 Easily-built Class B gassie w ith 50” span A 7/8 size "Big John" biplane for .61 en­ 11791 POCKET SOARER S3.00 from May '41 A ir Trails. H .A . Thomas. gines and 4-channel R/C. Bill Northrop. All sheet-balsa T-tail one or two-channel 50" span glider, for .020, B. Lundström. No. 7791 TURNER SPECIAL $9.00 11792 CURTISS 18-T-1 $3.00 Roscoe's famed Thompson Trophy racer " s t i c k " ΈΜ PATTERNS in 2” = 1* R/C scale. Col. Bob Thacker. Rare tri-winged military seaplane in 3/4” j Complete sett of pressure sensitive pettemt rubber scale, spans 24” . By Bill Noonan. No. 7792 P E R C Y $4.00 i provide "printed wood”. . . on your stock . . Pulse-rudder slope glider uses panty-hose ■ for selected MODEL BU ILD ER plant. Pratt 1179-O.T. MISS PHILADELPHIA $7.50 egg/pod fuselage, 68" span. Jack Headley. ! all patterns for ribs, bulkheads, tips, etc., on Maxwell Bassett's famed 8-ft. parasol gas • proper thickness sheet balsa or plywood, model, kitted by Scientific. By MB staff. No. 6791 CAP 20L-200 $10.00 j and cut 'em out1 No tracing, no transferring, Fully aerobatic large-scale low winger for I no plant tearing, no inaccuracies. Just like 2 cu. in. or red.-drive engines. Jeff Tracy. j making up your own kit with printed wood, No. 10791 THE BIG STIK $10.00 t "Stick ’em Pattern" numbers correspond to World's most popular R/C design in a new No. 6792 LONGSTER $3.00 j plan numbers Order with plant and they'll size (8VS'). For 2” engines. Don Anderson. F/F or R/C 1-inch scale (30” span) cutey i be mailed together . . 3rd Clast. Add 654 for CO 2, .01 0, or rubber power. Le Gray. ■ per set to mail patterns 1st Class. No. 1079-0.T. PANTHER $3.50 • CALIFORNIA RESIDENTS ADO «% TAX. Classic low-wing kitted by Peerless, for No. 679-O.T. VALKYRIE .020 $3.00 .19-.23 ign. eng. 46" span. Walt Schultz. Build this .020 Replica of Carl Goldberg's No. 11731SP BIG JOHN the FIRST S6.96 famous soaring gas model. Rudy Calvo. No. 574-O.T.SP T-D COUPE $2.96 No. 10792 FIRST NIGHT $2.00 No. 674-O.T.SP RED ZEPHYR $3.96 Novice sport rubber ship, 24” span. OK No. 5791 DFH - 20 $7.50 No. 6741SP TR IX TER BEAM $2.96 Latest FAI pattern ship by top Swedish for P-30 event. By Godden & Moseley. No. 774-O.T.SP OUT Ό SIGHT $2.45 flier. Has built-in pipe. Bengt Lundström. No. 7741SP CURTISS A/12 SHRIKE $3.96 No. 1079-S5 HANKERCHIEF $2.00 No. 974-O.T.SP POWERHOUSE $3.96 No. 5792 CORNIER Cs 20 $2.00 Hull lines drawing for 50/800 R/C sailing No. 91074-O.T.SP BUHL PUP $4.96 yacht. Uses Bingo sail rig. By John Hanks. Contest-winning CO 2 scale free flight. It takes off water every time. Walt Mooney. No. 1174-O.T. SP LANZO STICK $1.96 No. 11743 SP "C-O UELL” $3.96 No. 9791 SYNCHROGYRO $5.00 No. 579-0.T. TAYLORCRAFT $10.00 No. 675-O.T. SP M ERCURY $3.96 Twin-rotor autogyro for 2-ch. radio, .35 Quarter-scale in 1941! Famous 9-foot de­ No. 775-0.T. SP 80M BSH ELL $3.26 engine. Easy to build and fly. G. Chaulet. sign kitted by Miniature Aircraft Corp. No. 277-O.T. SP BER LIN ER JOYCE $6.26 No. 4771 SP "MISS ARPIEM" $3.26 No. 9792 CRICKET $3.00 No. 577-O.T. SP GLADIATOR $4.76 Balsa profile fuse, Ace foam wing 1/2A No. 4791 HOLLY HAWK $3.50 quickie for 1 or 2-ch. radio. J. Headley. Scale-like shoulder wing sport model for 3-channel R/C, .19 eng. Mike Hollison. Price includes 3rd Class pottage and reprint No. 979-O.T. LANZO '37 STICK S8.50 of building instructions (if any). Add 664 First R/C Nats winner, 4th in Famous No. 4792 PETREL $5.00 PER PLAN for 1 tt Class postage. Add $1.00 R/C series. Spans 9 ft. By Chet Lanzo. Rugged, competitive R/C sailplane with PER PLAN for overseas orders (except APO 100” or 2-meter wing options. Jim Ealy. and FPO). Complete plant list 354. CALIFORNIA RESIDENTS ADO B% TAX. No. 8791 SNEAKY PETE $6.50 No. 4793 PELICAN $2.50 MOOEL BUILDER PLANS SERVICE Contemporary .61 pattern ship. Howard Far out, but well-tested F/F pusher can­ Pete lines, fixed dual gear. Dick Hanson. ard flying boat, .049-.09. Jim Fullarton. 621 WEST NINETEENTH ST. COSTA MESA. CALIFO RN IA 92627 cycle. Heeded, they will yield gratifying d) Add masking tape pieces inside tion, has been a pleasant one. They area results; ignored, you will gel poor hub. Stick to outer wall in appropriate fine group of people who have been results. locations for balance. very fair and reasonable in all of our Excerpts from the Midwest RK-049 VIBRATION REDUCTION dealings. "I have been involved with model AXIFLO instructions, which I wrote, A good engine vibration reducer aviation most of my life; in fact, it has follow. Cox was very helpful in advising system can be made by rolling a strip of been my and my family’s life. For what­ me on these topics, moreso than I have 1/32 ply X 1/4-inch wide twice around a ever success I may have had, I owe a encountered before in the model field. 1/2-inch rod or dowel. Hot Stuff it to great deal to the hobby. ROTOR BALANCE hold shape. Insert in front centerbody "My future plans are uncertain, how­ Check the balance of rotor and spin­ ring hole over the front end of the TD ever, I hope that all of my friends in the ner on a knife edge by inserting a firmly- engine and push it back until it is aft of fitting spindle through the hub, then hobby will keep in touch. If I can be of the gold colored engine prop hub. Glue any help at any time, please let me know. setting the spindle across two knife in place with Hot Stuff or epoxy. The I.D. Sincerely yours, Phil Kraft, President.” edges. Follow the process in the steps and O.D. of this plug must be sanded to below: fit. It should be a tight fit over front of TD * * * a) Mount spinner to rotor. Mark to crankcase. This process in effect firmly Leisure Dynamics, Inc. announced in allow removal and replacement in the “ grabs” the engine well forward of the a news release on July 23,1979, that on same location. Make sure spinner is mounts, greatly stiffening the engine that date, “ the company had acquired properly seated in rotor groove. If mounting against vibration. · for cash the assets of K&B Manufac­ spinner rocks while seated, you need to turing Division of A.U. Products Cor­ drill out the spinner attachment holes to poration. K&B, based in Downey, Cali­ 3/32 in. It is probably wise to do this Workbench . . . Continued from page 6 fornia, is a manufacturer of precision model engines and accessories sold to before attaching the spinner to the day, September 4,1979.1 hope he will be the hobby trade in domestic and export rotor. able to guide the company to provide a b) Drill through rotor and spinner, greater contribution to the sport of markets. working from the rear of the rotor, using "Louis F. Polk, Jr., chairman and chief radio control. rotor as a drill guide (1/8-inch drill). executive officer of Leisure Dynamics, c) Insert 1/8-inch spring wire or drill "Our seven years association with our said the existing management of K&B rod shaft. parent company, the Carlisle Corpora­ will continue under John Brodbeck, 116 R/C MODEL BUILDER COVERUP! Sturdy, dark green vinyl covered binders for your valued copies of FLY ELM MODEL BUILDER. Gold logo. VL-101 Electric propulsion system shown— using Hytork 48 motor and planetary gear box, S)-3 switch & charging jack, and B-33L fast charge ni-cad flight battery—total weight 2»/2 oz.— w ill power models 25 to 50" wingspan weighing up to 10 oz. Send 50c for latest catalog showing V L PRODUCTS full line equipment & accessories. Division of Vista Labs Hobby dealers send for information. i 7023-D Canoga Avenue \ Canoga Park, California 91303

Embryo Model II α Η ΟΙΤΜΓ■ „ "P R A IR IE BIRO " The New Super Champ Features the World's Snap-on mounts Only $4.95 each, two for $8.95, three to fit most air­ Complete 79 Catalog $1.00 Fastest Wing! Snaps on planes: $8.95 pr. KIT $3.95 and off in an Instant. for $12.95, four for $16.95, or five 16" WINGSPAN GUIDE OF RUBBER MODEL SUPPLIES No Uglv Mounting for $20.50, postpaid in the USA. Out­ P O BOX 2 4 9 · -MB Peck-M ym ers Bands or Bolts! side the USA, add 90 cents per binder. LA MESA, CALIF. 92041 California residents add 6% sales tax. Jet," a new version of its "Jet" cyano­ acrylate adhesive. Where other instant NOTE: One binder holds 1971 and 1972. Use one binder per year for 1973 to present. glues are water-thin, Carl tells us that the WS - 56” _ new Super Jet is much thicker, allowing ENG. .20*.35 (For UPS delivery, add $1.00 per binder) it to be used in ways not possible with Easy to build ir fly. All balsa & ply. const. ABS tips 8i cowi.hand-cut parts, rolled the usual “ quickie-stickies.” For in­ plans & snap-on wing system. S54.95 MODELS* stance, Carl says you can lay down beads of S.J. that will sit there waiting for the GEMINI MODELS, INC. BUILDER application of a second piece of wood. 311 Lakeview Ave.. C lifton. NJ 0701 1 621 W, 19th St., Costa Mesa, Ca. 92627 Pushing the two pieces together spreads (201) 772-9474 the glue into a thin layer, at which point pre-pav orders, we ship, dep. req. on c.o.d founder and president. ‘Mr. Brodbeck's it "goes off” in a few seconds. Not-so- reputation and experience in the hobby accurate fits will also stick better, as the newsletter from Flint, Michigan, edited industry will be an important addition to glue will harden, though not as fast, by Jack Pray, and he quoted from "The Leisure Dynamics,’ Mr. Polk said. even in areas that aren’t snug (a great Flying Machine,” Alabama. help to hackers like us who can’t make a “ Leisure Dynamics, Inc. is a Min­ THE POWER OF WORDS neapolis-based manufacturer of game solid joint!). The possibilities become The Lord's Prayer has 56 words. and hobby products and recently began interesting when you think about stick­ Lincoln’s Gettysburg Address had 266 to diversify into publishing. For the year ing leading edge sheeting to ribs and words. ended December 31, 1978, it reported spars, making large area laminations, net income of $2.8 million on sales of and installing bulkheads. S.J. will even The Ten Commandments has 297 words. $50.3 million." make small fillets, for extra strength. In case you hadn’t noticed, Cox We’re looking forward to this ad­ The Declaration of Independence has 300 words. Hobbies Inc., Santa Ana, California, is a hesive, and will tell you more when subsidiary of Leisure Dynamics, Inc. we've had the opportunity to try it in The AMA R/C Pattern has only 2,456 person. words. * * * A recent government order setting NUFF SAID the price of cabbage has 26,911 words!· Some industry news that’s not so This one was in the Aero Radio Club pleasant. John Gorham, of "Heli-Center West,” 23938 Craftsman Road.Calabasas, CA 91302, a Schluter R/C helicopter representative in the U.S., reports that his office was broken into recently, and CARR SAILS the following items were stolen: a complete business computer system; a 4115 172nd AVE. N.E. video system, along with many irre­ placeable helicopter flying tapes; John Gorham’s 1979 MAC Show R/C heli­ REDMOND, WA. 98052 copter winner. . . a scale version of the STANDARD ON ALL CARR SAILS R n ·* Amaresn-mada DACRON saiidoth Los Angeles Fire Department’s “ Ship 2,” Vinyl, press-on numerals and insignia a red and white Jet Ranger, with S.T. Blue H u l H S M adgas akmineta fraying Costed flat mass steal yb*ay installed Head engine, but no radio. The com­ Rosed-edge grommets in lack, daw t head puter and video systems will be extra Bolt rope mains! lull mast attachment hard to locate, but if a red and white Jet Santa Barbara ...... $30 00 10-RaNr...... $30 00 East Coast 12 Mater $30 00 50/800 (M-dass) $30 00 Ranger suddenly shows up, check it over 36/800 $25 00 mtarnal A-daaa $35 00 carefully. Waal Coast 1 2-Mater $30.00 Star 45 ...... $30 00 Vanguard J boal $40 00 T$A Pstral $30 00 NEW KINDA STICKUM Scala vassals, spaoal purpose boats ons-ot-a-kinds Writs lor a quota, and tor our Well, not entirely new. Carl Goldberg t979Brochure and Utsd Saits Ust Models Inc. is about to release “ Super

NOVEMBER 1979 117 Quick-Build BYRON ORIGINALS ~ Exact Scale Precision 4 ‘ Complete Byro driven pulley •Drive, w/prop & ensures vibra spinner, only 2% tion free service Less than one year ago, Byron Originals introduced its lbs. Pitts Special with optional Byro-Drive reduction unit. We Unique engine made some pretty strong product claims and were more mount offer» than ready to back them up. We have since learned, from wide range of position· for actual applications by customers both in this country and locating engine overseas, that the Pitts and drive unit have far exceeded and exhaust equipment ben­ our own ratings. Whether it be packaging, overall parts fit, eath cowl ease of assembly, fidelity to scale, flight performance, 20 X 8 maple materials quality, overall appeal or completeness, these ΙΒ0Π tightener prop and 3V4" offer» easy •pinner included with Byro-Drive. firsts from Byron Originals have firmly established a new Precision pufleys adjustment for standard of excellence for the entire modeling industry. designed end optimum per matched for peak formance and tensiometer ind­ performance extended belt icates exact No one will agree more than the proud and satisified recommended Pitts and Byro-Drive owner. He'll be the first to recom belt tension for peak perform­ mend a Byron Originals kit for your next project. And you ance and belt can count on him giving you a long list of reasons why. longevity Poly Flex * V We suggest you take his advice and look to Byron t elts-proven a f­ Originals for the newest and most intriguing concepts in ter years of tool Factory Direct Price shop applications recent modeling history. You'll agree it's like a breath of requiring up to 2 0 .0 0 0 rpms. fresh air. Prop. & Spinner Inc The Proven ^Pittswith Order Byro Drive model number for matching engine.

Model No. for Engine M FR 10- 60 & .65 OS. Max, frt. & r. valve RR-1 1 .61 & .65 Rossi, rear valve RF 12 .61 & .65 Rossi, front valve W FR -14 .61 speed Webra. *78-*79 SCALE KIT OF THE TEAR frt. & r. valve T F R -1 3 X.60 Supertigre, Wing Span:68 frt. valve. r. Wing A rea: exhaust 1 4 0 0 sq. in KF 15 61 Kraft Length: 62" HPFR 16 Silver Star or Gold Cup, frt. & r. valve O PSR 17 OPS .60 Speed, rear valve

Factory Direct Price

Pitts Kitts I at $212.95 ea. plus $12.00 shipping & handling. Fiberglassing kitts) at $39.00 ea. plus $2.50 shipping Byro-Drivets) Model No. (See chart at left) at $98.SO ea. plus $2.50 shipping. Foreign Inquiries Mig-15 kitts) at$l68.00ea. plus $8.00 shipping contact: Exportations, Ltd. Fiberglassing kit(s) at $22.50 ea. plus $2.50 shipping 17835 Sky Park Circle Suite E Irvine, Calif. 92714 Name U.S.A.

Address

1 have enclosed check or money order for $______Weight: ready-to-fly, j^Afuel. Please charge to Master Charge or Visa AccounL ★ Under 15 lbs. wiW iconokote finish. Master Charge * ______Exp Visa*. Expires ★ Under 17 lbs. with Epoxy/Fiberglass (Prices subject to change without notice) finish. Send to: Byron Originals, P.O. Box 279, Ida Grove, Iowa 51445. Includes ALL ITEMS to Kits... complete models as shown! Engine, radio, and final paint not included

Wing Span - 57“ MiG-15 Length - 55" w Ready-to-fly wt. · 8% lbs. A Wing area 600 sq. inches For .60 size engines and 4 channel radio

The First Practical Approach to Realistic Jet Performance That: • Is designed for the average R/C en th u siasts. • Allows short grass strip take-offs • Offers fast and easy starting without having to remove and assemble hatches. • Eliminates complicated belt-start procedures • Readily accepts most standard 60 size engines • Does not require high nitro fuel for satisfactory performance • Arrives factory installed (standard With factory installed equipment) and ready for engine. • Produces up to 8VS lbs. of static thrust with Schnuerle .60 and low nitro fuel. Quick Assembly

Scale Accuracy Ducted Fan Easy Access to Radio and Engine

Unlike other quick-build kits that often sacrifice authentic detail for fast assembly, Byron Originals has kept both authenticity and simplicity high on the priority list. All die-cut The ducted fan with exclusive wood parts and 11 foam components needed for completion quick-start capabilities. are designed with quick assembly, scale accuracy and minimized weight in mind. All foam modules consist of light­ weight yet impact resistant injection molded polystyrene. Fuselage consists of hand-layed fiberglass and arrives with

fan unit, thrust tube, radio compartment and push rods already k V installed. All decals and color scheme templates also included. All control surfaces utilize center point hinging requiring standard servos. Every last item, except radio, engine and final paint are included in kit. No shaping or carving required. No extension provided with kit. guesswork involved. Only quick, accurate and enjoyable Add $8.00 fo r building. shipping to any Optional epoxy/fiberglass kit for glassing wings and tail sur­ U.S. address. Items $168.00 faces available for $22.50. shipped by United Parcel Service. Factory Direct Price IN THE BEST CIRCLES, ITS liber skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch Available in seven satin anodized handle colors: Precision, Instrument-Quality Materials silver, blue, red, green, gold, copper, violet. Complete set in fitted hardwood case; includes Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, and 2 0 ...... $14.95 Deeply Knurled, Non-Slip Grip Individual handles (specify color) $5.95 Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) $2.10 Surgical Steel Blades (No. 12 or 20) $3.30 20

See your dealer, or order direct. £ Dealer inquiries are invited. PRODUCTS All direct orders sent postpaid in U.S. MODEL BUILDER California residents add 6% sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 Engines Arriving W orld Oct. 1979 OS THREE IN A ROW Dave Brown, for the third year in 15 R/C & 20 R/C a row, has won the Nationals in Masters Class R/C aerobatics using After we ship our dealers priority a World Engines Expert radio. This, orders on these we will show some plus his win at the Masters, proves inventory stock left so your dealer that these are contest caliber radios sold at sport flyers prices. Dave can get additional stock. These en­ used an OS 61 FSR in hisTiporare. gines are super compact, light­ 7 Ch. Single Stick (5S). . . $484.95 weight, beautiful, excellent throttle 7 Ch. Expert ( 5 S ) ...... $464.95 response, with muffler. 7 Ch. Single Stick (4S) .. . $459.95 MAX 15 R/C w/m... $42.00 7 Ch. Expert ( 4 S ) ...... $439.95 5 Ch. Single Stick (4S). . . $419.95 MAX 20 R/C w/m.. .546.00 5 Ch. Expert ( 4 S ) ...... $399.95

OS Supertigre 90 RSR Marine X-60 RE & SE The rear exhaust has begun to make 65 RSR Marine its notch in the competitive arena. These water cooled marine engines In airplanes with the buried pipe show much heavier construction this engine has proven to be a than anything previously offered. potent, reliable powerplant. It also Complete with flywheel and uni­ shows typical Supertigre's unsur­ versal. Large 7E series carb. passed stamina and longevity. Our Tony Frackowiak is running X-60's. 90 RSR M ARINE . .5299.00 65 RSR M ARINE . . S249.95 X-60 R.E. ABC _____ $129.95 X-60 S.E. A B C _____ $129.95

FS-60 4-CYCLE Supertigre This engine represents a real engin­ eering triumph for OS. A very quiet X-11 R/C running engine, it really does not We are now distributing the plain require a muffler. Glow plug ig­ bearing version of this engine. This price will go up December 1, 1979. nition. .60 cu. in. $225.00 The ball bearing version is expected July 1980. This engine has real Schnuerle porting and typically NEW!! MAX 50 FSR Supertigre, it is built on the strong side. Complete with nice muffler Promised in October. All new case and blue anodized head. Carb and shaft — not a stretch job. action is the same as the big Tigres. Priced same as 45 FSR . . . $109.00 X-11 R/C w / m ...... $37.95

61 FSR & 61 VF Supertigre

The ABC 61 VF was described 2-3 issues ago. 61 V F = a very strong X -2 S R/C rear exhaust engine for use with a This engine is a custom extra heavy pipe. The 61 FSR replaces the 60 duty twin ball bearing engine that FSR in the OS line. Changes: grew out of the X-21 S .E . This stronger case, larger crank, stronger engine has .25 cu. in. displacement. crankpin, larger rear bearing. 7D It replaces the popular ST 23 large bore carb. 5/16 prop shaft, R/C in the Supertigre lineup draw bar carb retainer. (a Schnuerle). Complete with muf­ fler and a blue anodized head. 61 VF ABC w/om. .$159.95 Price will go up December 1, 61 FSR w /om _____ $145.95 1979. 61 FSR w/m...... $159.95 X-25 R/C w /m ...... $69.95 world Engines 8960 ROSSASH AVE„ CINCINNATI, OHIO 45236 TELEPHONE (513) 793-5900 TELEX 214 557 400 FEET UR 2200 FEET OUT WE LOST DIRECT VISUAL CONTACT THROUGH A PRE-ARRANGED,TWO-WAY RADIO COMMUNICATIONS NETWORK WE CONTINUED TO FLY"

RESULTS: AT 4300 FEET WE CONTINUED TO HAVE A SOLID LINKUP BETWEEN THE R/C GUIDANCE SYSTEM AND OUR PLANE. AT 4400 FEET, STILL IN CONTROL. WE TURNED OUR AIRCRAFT AROUND AND BROUGHT IT IN / FOR A PERFECT LANDING.

MRC'S R/C GUIDANCE SYSTEMSj LONG TESTING, LAKEHURST NAVAL AIR STATION LAKEHURST, NEW JERSEY MARCH 1979.

OUIDANCB ■ YiTBM IOQQ 72.240»..

R/C Guidance Systems Available in 2, 3 and 4 channels

MODEL RECTIFIER CORPORA iON / 2500 WOODBRIDGE AVENUE / EDISON, NEW JERSEY 08817

—V