MO BUI volume 10, number 100 ISSN 0194 7079

• CURTISS F6C-1 Eugene Martin's 2 " R/C Scale Classic • GOLDEN EAGLE New Std. Class Sailplane by Tom Williams • SKYROCKET - 1940 O.T. By Larry Eisinger • F.A.C. TRAINER F/F Sport Rubber by Frank Scott The i h Radio co of Whttt makes the Ι -series so unique' Full programming. Modular AM and FM queue) boards. ATV. Direct Servo Con­ trol. Dual rates dnd mixing circuitry. Human engineered controls of uncommon quality and precision. And the meticulous hand­ rails mans hip that has made us famous.

Tl»c acutpenbe U N 2ft p ^risciti^ l»uwt*tii 4. 5. 6 and S channel models, plus the 5JH/h Inside and out the Futaba "Supcmtlios helicopter and the are built for !he most critical radio control 6JB/be.<; version* enthusiasts sc»s«>».· And now the . the reliability, and technical wizardry/ "“« j new S124 servo, with to match the most demanding and skillful pat­ dual ball bearings and tern flyers!' noted Mode! AirpUmt .Virus. coreless high torque/high speed motor, is Fixing Models found the component available as a J-series option. assembly and circuit board layout "truly Closely examine the J-senes at your RC excellent" specialist. Isn't your model worthy of a Futaba? Futaba / ulaba t orporatioa of A mtrica 555 Hr« tVi m naStrrtt/C<>mpcim/CA <*>220

L B A T T (% CHECK

ö -® THINK TWICE m I B

The best Glow Plug and the best Fuel go together like a horse and carriage. You can’t get the best out of either without the other. For both — THINK K&B and be assured of consistent peak performance. K&B Glow Plugs with patented blow-out proof seals have proven their consistent performance over the years, and K&B FUEL is the fuel that has brought home more winners at the NATS and other prominent meets than any other fuel.

KB-IL KB-IS (long reach) (short reach) K&B GIVES GLOW PLUGS YOU A CHOICE The KB-IL and KB-IS Glow Plugs fea­ OF 7 FUELS ture a special platinum alloy wire — superior to that used in any other glow K&B MODEL ENGINE FUEL plug — that makes them more capable with X2C OIL of withstanding the fierce heat of to­ K&B 100+ for Free Flight, U-Con- day's "Hot” fuels. trol and R/C Flying K&B 500 for R/C Flying & R/C Race Cars — where both high and low speeds are required K&B K&B 1000+ for VaA Engines K&B SUPER SPEED for going "all GLOW PLUGS out” K&B MODEL ENGINE FUEL with Idle Bar with CASTOR OIL The "Idle Bar" Glow Plugs, long or K&B 100 for Free Flight, U-Control short reach, are the result of a con­ and R/C Flying cept first developed by K&B many K&B 1000 for y2A Engines years ago. They are a "must" where K&B F.A.I. 80/20 for Pylon, Free control from a low idle to a constant Flight and U-Control Speed — no maximum r.p.m. is required at a given Nitro. Qualifies for F.A.I. rules speed. K&B Fuel is consistent trom can to K&B Glow Plugs continuous demand can and year after year . . . the speaks lor itself. quality is always there.

K&B MANUFACTURING 12152 WOODRUFF AVE., DOWNEY, CA. 90241 MAY

1980

volume 10, number 100

621 West Nineteent h S t, Costa Mesa, California 92627 Phone: (714) 645-8830

STAFF PUBLISHER CONTENTS Walter L. Schroder EDITOR FEATURES Wm. C. Northrop, Jr. W O R K B E N C H , Bill Northrop...... 6 GENERAL MANAGER Walter L. Schroder “. . .T H R E E IF B Y A I R ,” Letters to the Editor...... 7 ASSISTANT EDITOR O V E R T H E C O U N T E R , Phil Bernhardt ...... 8 Phil Bernhardt T H E F L IG H T IN S T R U C T O R , Dave Brown...... 11 ASSISTANT GENERAL MANAGER R / C W O R L D , Bill Northrop ...... 12 Anita Northrop ” 1 TO 1” R/C SCALE, Bob Underwood...... 22 ART DEPARTMENT H O W T O F L Y P A T T E R N , Dick Hanson...... 24 Chuck Blackburn Al Patterson F U E L L IN E S , Henry Nelson...... 25 OFFICE STAFF F A I S O A R IN G , Dave Thornburg...... 26 Mary Ann Bell T R Y A N R / C G L ID E R P O S T A L , Ken Cashion ...... 28 Edie Downs R / C S O A R IN G , Dr. Larry Fogel...... 29 Debbee Holobaugh Pat Patton P L U G S P A R K S , lohn Pond ...... 36 A. Valcarsel H A L F -A S C E N E , Larry Renger ...... 42 CONTRIBUTING EDITORS E L E C T R IC P O W E R , Mitch Poling...... 44 Dave Brown Mitch Poling R / C H E L IC O P T E R IN V E R T E D F L IG H T , Mike Mas...... 46 Otto Bernhardt John Pond Jerry Dunlap Fernando Ramos M O DIFYIN G THE CO X CUB, Larry Renger...... 47 Larry Fogel Larry Renger R / C P O W E R B O A T S , Jerry Dunlap...... 48 Chuck Hallum Dan Rutherford Bill Hannan Tom Hutchinson C L U B S : H O W T O H A V E A G R E A T O N E , George Wilson 50 Joe Klause Dave Thornburg C O N T R O L L IN E , Dan Rutherford...... 52 Walt Mooney John Tucker Bob Underwood H A N N A N ’S H A N G A R , Bill Hannan...... 54 F R EE F L IG H T , Tom Hutchinson ...... 58 ADVERTISING MANAGER F R EE F L IG H T S C A L E , Fernando Ramos...... 62 Walter L. Schroder

SCALE VIEWS CURTISS P-1B, Peter Westburg...... 20 R/C MODEL BUILDER (ISSN 004 7079) is 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 years. Single copies $2.00. Add $3.50 per CURTISS HAWK F6C-1, Eugene Martin...... 14 year for postage outside the U.S. (except GOLDEN EAGLE, Tom Williams...... 32 APO and FPO). SKYROCKET O.T., Larry Eisinger...... 41 Copyright 1980 by RCMB INC. All rights reserved. Reproduction without permission PEANUT STEARMAN 4E, Tom Cadogan ...... 55 prohibited. F.A.C. TRAINER, Frank Scott...... 63 Change of address notices must be received six weeks before date of issue that new address takes effect. Send old address with new; old label preferred. Post Office will Cover: Lori Fragola, Lakewood, California, and Ron Sivils' "Magnum 12" sailplane, not forward copies unless you pay extra built from a Soarcraft kit by Mark Berg, make an eye-catching couple for this 35mm postage. Duplicate issues cannot be sent. transparency taken by photographer John Craney. The scene is "somewhere along the Southern California Pacific Coast". Second class postage paid at Costa Mesa, California, and additional offices.

2 R/C MODEL BUILDER COMPLETELY READY TO FLY Ideal for beginning flyers, the Breeze is designed for the mod eler who wants the best avail· able sailplane but hasn't the time or ability to build one. Utilizing the most ad­ vanced lay-up technics along with our molded process and efficient airfoils, the Sea Breeze is strong, maneuverable, SPECIFICATIONS: and easy to fly. Wing—99.75" wing span Epoxy fiberglass fuselage Area 760 sq./in., 12.7 Aspect Ratio complete with push rods installed, Root Airfoil Eppler 385 Mod 2 fully painted in white. Wings and Tip Airfoil Johnson 16 with 3° washout stabilizer molded from epoxy fiberglass Stabilizer— 120 sq./in. available in choice of six colors, (red, blue, Total weight less radio 40 oz. orange, brown, yellow or white). Just install your radio and go flyl UNPAINTED...... SI 69.95 PAINTED...... $229.95

DEALERS: Contact one ot these fine distributors who handle our kits: • ΑΛ. DISTRIBUTORS · GREAT PLANES DISTRIBUTORS · MIDWEST MODEL SUPPLY R/C AIRCRAFT • TECHIMODELS · B. PAUL DIST · PAN AMERICAN * WORLD ENGINES ADDITIONAL DISTRIBUTORS WANTED 4 8 5 EASY ST., SIMI VALLEY. CA 9 3 0 6 5 (805) 5 2 7 - 4 0 0 4 / iťs official! Sullivan is... THE CHOICE OF CHAMPIONS

At the 1979 National Model Airplane Championships, sponsored by the Academy of Model Aeronautics, winner after winner had the name “Sullivan” noted somewhere on their entries. A Sullivan tank. A Sullivan control line. Always, it seemed, a Sullivan something. Makes us proud to know that Sullivan is the choice of champions. Proud ... but not surprised. We take special pains with our products. They have to meet tough standards — the standards of serious modelers — us. Besides, we always knew our customers were champions.

Tanks — We’re #1 Starter’s Big Brother Over half of the winning contestants in #1 Line of Winners For years, Sullivan has had the superstar the 1979 National Model Airplane Cham­ of starters. The starter that turned on the Winning control line flyers at the AMA whole world. The one with higher torque pionships held in Lincoln, Nebraska who championships chose Sullivan lines at specified what tank was installed on their & RPM’s, heavy duty, long life motor, a rate of almost 3 to 1 over the next "instant-on” strip switch, safety hand entries said they were using Sullivan most popular brand. That's a lead that's Brand. Over half. No other brand could guard, and 2-year guarantee. almost as long as the four standard Now along comes the newest winner — even come close. lengths ... 35', 52', 60' and 70' ... of Champion modelers agree that, with the its big brother. A 24-Volt powerhouse with Sullivan’s Pylon Brand Control Lines enough torque to start almost anything. FULL TANK SYSTEM, Sullivan has really that most dealers stock. And, don't put it all together. With a built-in bubble Hard-to-start airplane, boat or car en­ forget, diameters run from .008" up to gines. The big ’/«-scale monsters. Almost space for the air and the tubing, you can fill .021". A size for all champions. it all the way to the top and enjoy extra- anything. long flights. Just like the other champions. Check this new winner out at your favo­ rite dealer's. And — if he doesn't have it yet — tell him to hurry 'cause he’s keeping a champion waiting ...you.

WARNING To All Modelers. Do Not Fly Near Overhead CUV Power Lines PRODUCTS, INC S3S DAVISVILLE ROAD · WILLOW GROVE, PA. 19090 · USA (215) 659-3900 * EXACT SCALE OUTLINES * SMOOTH AND STABLE ENGINE SIZE: 60 CU. IN. * RESPONSIVE TO CONTROL B f t r WINGSPAN: 65 IN. * BUILDS FAST WING AREA: 645 SQ. IN. * 4 OR 5 CHANNEL RADIO WEIGHT APPROX: 7 -1 /2 -8 LBS. FOR RC SPORT SCALE AND SPORT FLYING

KIT FEATURES: Unlike other models with plastic fuselages, the Kwik-Bilt Cessna doesn’t Cessna Factory 3-View Drawing depend on the shell for strength. The Cessna fuselage is based on a solid Formed Plastic Fuselage Halves balsa center profile, beefed up with plywood doublers. Tail, wing, engine Realistic Cessna Crimping For and landing gear are all mounted on this profile center. The plastic fuselage Ailerons, Flaps, And Elevators shells are really only streamlined fairings, decorations that add the scale shape, instead of functional parts of the fuselage. Minimal flight and Formed Clear Windows vibration loads are imposed on the shells. Even if they should crack, the Molded Plastic Engine Cowling structural integrity of the model is maintained. Molded Wheel Pants Precision-Cut Foam Wing Core Some kits use styrene or other types of plastic that are difficult to glue Solid Balsa Internal Fuselage Profile and paint. The ABS plastic parts furnished with the Cessna can be welded Sheet Balsa Tail Surfaces together in seconds with butyrate dope thinner, acetone or MEK. A wide Formed Aluminum Main Gear variety of finishing materials - Sig Supercoat dope, epoxy paints or enamels- can be applied to the ABS plastic used in Sig kits. Strong Coil-Spring Nose Gear Decorative Decal Sheet Step-By-Step Instruction Book Die-Cut Plywood Parts Sig Quality Balsa Molded Nylon Control Horns s>— Molded Plastic Hinges s Tuf-Steel RC Links and Rods ^ S IG ^ s Double Coated Servo Mounting Tape Aluminum Motor Mounts Nylon Nose Gear Bearing And Steering Arm KIT KBRC-5 Nylon Wing Screws Blind Nuts And Bolts $89.95 Assorted Small Hardware

1st 1979 Mint Julep - Rough River, KY, by Hank Pohlmann 1st 1978 Gateway Championships, St. Louis, MO, by Hank Pohlmann Son, Steve, holds as Hank Pohlmann starts up at the Lincoln Nats

See your dealer first! To order direct, add $1 postage under $10, postage free over $10. No C.O.D. PLACE YOUR ORDER NOW FOR SIG’S LATEST COMPLETE CATALOG-NO. 41- $2 PPD. SIG MANUFACTURING CO., Inc. Montezuma, la. 50171 Bfii N o r t h r o p '* w o r k b e n c h

F/F MODEL BUILDER DOWN M EMORY LAN E . . . We took this photo at a Delaware R/C Club invitational get-togeth­ The above sub-title is in response to er in the mid-1950's. Note that there is only one frequency line . . . 27! And who says large Steve (O’Bat) Helmick’s revised title on scale models are new? Look at No. 4336! Man in long-sleeve shirt with hand in pocket was Vern the January issue of the well-known Kroemer, now deceased, who was a leading R/C experimenter in the Philadelphia area. Most "R/C Bat Sheet” . . . well, at least “ R/C” every ship in that line was escapement controlled. Also recognize Carl and Betty Cantera. Hi! for January, though he says it actually Jr. (maybe that’s why he’s "outgoing!” ) Airplane Club, formed in 1946 at Jack stands for "Really Cool.” Since he's for which we wish to thank whoever is Davis' model shop in Detroit. Art Ryan being nice and not calling it "Raunchy responsible. Bill also notifies us that the was a founding member and AMA Control,” we won't say that "F/F" really new Membership and Subscription contact for the club. stands for "Frantic Fanatic” .. . but it Chairman is Kit Sonesen, 8616 Maple Main reason for Art’s letter, unfortu­ does have a nice ring (all right, Ron Grove Ct., Sacramento, CA 95828, and nately, was to enclose a clipping from a Roberti . . . down boy!). the Supplies and Service is now man­ July 1979 issue of The Detroit News, Steve writes a very informative free aged by Marty Thompson #1, 2012 which stated that Warren Bartlett, 57. flight newsletter for the Seattle-based Landon Lane, Sacramento, CA 95825. and his wife Betty, were killed on July 9, Strat-O-Bats Model Airplane Club, a F/F Geez .. . what with that NFFS mem­ when the plane he was piloting crashed oriented club which includes our former bership, we better take the radio out of as he was making a landing at Clearwater and present F/F editors as members, Bob our Starduster 900! Executive Airport, Clearwater, Florida. Stalick and Tom Hutchinson. For three Ironically. Bartlett had headed a drive to bucks a year and your address sent to LEST WE FORGET keep authorities from closing the Clear­ Kevin Collins. 7902 133rd N.E., Red­ Genuine modeling old timers, water airport, which was the center of mond, WA 98052, you'll get 12 copies a whether they attended or not, must controversy and criticism by some safety year. certainly remember the great Plymouth groups who claim the airport is unsafe. Gotta kick out of thisone in "R /C ” Bat International Model Airplane Meets of The newspaper did not give any details Sheet: A Canadian once said, "Canada the late 40’s and early 50's, before the of the accident. charges only 3 cents to mail a letter, but I.R.S. made it impractical for large they charge an additional 14 cents for companies to use excess profits for tax- OHIO NATS storage fees.” With a slight change in deductible sponsorships. Regardless of After a great deal of fingernail biting numbers, the same surely applies in the the secondary motive, modeling in and groans of "Where do we go from U.S. general received great benefit from here?” AMA officials have finally been While under the F/F title, we’ll men­ these meets, which were second in size able to firm up a Nats time and place... (s). tion that Australian Paul Van Leuven’s only to the AMA Nationals. In brief, R/C Pattern, Pylon, and Scale, second place 1980 World Champs Wake­ Thanks to a letter from Arthur Ryan, and all Control Line events will beat Wil­ field model will be featured in a near Farmington, Michigan, we are at least mington, Ohio. Free Flight, R/C Soaring, future issue of R/C . . . oh, what the hell, able to call our readers' attention to the and Helicopter will take place at Wright F/F Model Builder. The plans are well fact that the head of the Plymouth Field, Dayton. Indoor will be flown at the done and clearly illustrate two different meets, and at the time. Director of University of Cincinnati. The Western front end set-ups. Personnel Management for the Chrysler Ohio Radio Kontrol Society (WORKS) We have just received our honorary Corporation, was Warren E. Bartlett, of lived up to its name in bringing the membership card in the NFFS from out­ Detroit. Mr. Bartlett was also founder whole thing together, while working in going Membership Chairman Bill Booth, and president of the Strathmoor Model Continued on page 106 6 R/C MODEL BUILDER Ford tri-motor. More cars than you have ever η seen. Old Rhinebeck Aerodrome. Rhinebeck, New York, Older aircraft, dating back to WW-t. most « I · » if by m flying condition SST Aviation Exhibit Center, Kissimmee. (Letters to the Editor) Florida Small collection built around Boeing SST mockup. Some rare types Dear Sirs: Rucker. Alabama Nice museum, primarily USS Alabama Battleship Commission Mo­ In response to Dan Lakenmacher's request helicopters. bile. Alabama Small number of WW-II aircraft, in your March issue, here is some information Strategic Aerospace Museum. Belleview including rare Kingfisher Battleship and about aeronautical museums. First, the aero- (Offut Field). Nebraska Primarily post-war submarine a definite plus museum business seems to be pretty dynamic, bombers Large number of interesting aircraft Airpower Museum. Ottumwa. Iowa Small and museums come and go with surprising Planes of Fame, Chino (Chino Airport), collection ol primarily civil aircraft, very informal rapidity The older and larger ones are. of California One ol the better ones Many and friendly atmosphere Home of the Antique course quite stable, except that the aircraft on aircraft, including Zero and P-26 in Hying Airplane Association display change trom time to time either be­ condition. Examples ol very rare aircraft Hill Country Transportation Museum. Mor­ cause they cannot display all of their examples, Pima County Air Museum. Tucson. Arizona gan Hill. California Small collection of all types, so rotate them, or because they loan items Large outdoor museum, primarily AAF post­ including flying Ford tn-motor Plan to lunch at back and forth between museums Any listing, war Well preserved in dry desert climate adjacent restaurant, decorated with at least therefore, will slowly but surely get out of date I Adjacent to Davis-Monathon airbase where 100 exquisite scale R /C models around a real have been told that the Smithsonian keeps a surplus aircraft are stored, Base maybe toured Blériot. record of most museum aircraft in the U S on a by prior appointment Staggerwing Museum Foundation. Tulla computer tile, and that a printout is available at Experimental Aircraft Association Air Mu­ homa (airport). Tennessee Primarily Beech a nominal lee If so. an annual update would seum. Franklin. Wisconsin Large museum, Staggerwmgs and Travelairs. all immaculate provide fairly good data primarily civil aircratt including many unique and m flying condition Hard to Imd but ask tor The number of museums, particularly it you one-off homebuilts. Has only surviving Stuka airport, then ask at hangars include the smaller museums with only a lew Bradley Air Museum, Hebron (Bradley Chanute Air Force Base. Rantoul. Illinois aircraft, is amazingly large, numbering better Airport). Connecticut Wide range ol types Post-WW-II aircraft, sited along mam road than 100 in this country The listing therefore Some lost in recent tornado through base gets quite large particularly it you include Henry Ford Museum, Dearborn. Michigan address, phone number, curator, and ma/or Don 7 torget that there are many airports, both Small aircraft collection, but all rare types items. There are. however a lew softback large and small, that are virtual museums It Remainder ol museum almost overpowering in books published with lairly complete data may take a bit ol poking around to Imd which the scope and breadth of displays Very poor These of course become dated in time, but still hangars ha ve other than Cessnas and Pipers in labeling and description of exhibits are of great value. Four that I have found to be them, but they are there Visit on weekend Fredrick C. Crawford Auto-Aviation Museum. afternoons when possible, so hangars will be useful are: Cleveland. Ohio. Small but very interesting Aircraft Museum Directory. Quadrant Press. open while owners work on planes Some aircraft collection 19 W 44th St . Suite 707. New York. NY 10036 California examples would include Oakland Harrah's Automobile Museum, Reno. Neva­ 41 listings. 72 pages. $2 25. 1976 (Hangar 5). Van Nuys. Santa Paula. Palomar. da. Small aircraft collection, including JN-4 and Avialion & Space Museums of America. Jon Continued on page 100 L. Allen. Airco Publishing Co.. 219 Park Ave South. New York. NY 10003. 57 listings. 287 pages. $6 95. 1975 Museum and Display Aircratt ol the United States. Bruce Wm Orriss. American Aviation Historical Society. Box 99, Garden Grove. CA 92642. 103 listings, each aircraft listed. 76 pages, price not known. 1976 Veteran and Vintage Aircraft. Leslie Hunt, Charles Scribner’s Sons. New York. 9000 aircraft worldwide. 336 pages. $12.50. 1974 (4th edition) Now lor some of the major U S museums. I have visited all ol the ones listed, and all are very worthwhile, well worth extending a trip an extra day to see. National Air and Space Museum. Washing­ ton. D C Outstanding museum, with coverage from pre-Wrights to space. Write ahead of visit (three months) lor reservation to tour their Silver Hill facilities, where they keep the really good stuff. (Ask to see models on 4th floor of Smithsonian wen) Air Force Museum. Dayton. Ohio Best museum in this country, in my opinion. Primarily Army and Air Force examples, well restored. More emphasis on people than Smithsonian Quite dark. Take very fast film or a huge flash. United States Naval Aviation Museum. Pensacola. Florida Great museum NC-4 mind boggling. Most post-war aircraft outside where moist salt air is deteriorating aircraft rapidly Don’t delay visit it these are to be seen in reasonable condition Confederate Air Force, Harlengen. Texas. Less a museum, and more an operating airbase. Many CAF aircraft are not based at Harlengen. Most there are being actively restored, so you can see the interior as well as "Vou. know, I think we ought to go back to the exterior. United States Army Aviation Museum. Fort tree -flight." MAY 1980 7 OVER THE COUNTER

• Carl Goldberg Models is getting its feet wet in the field of R/C soaring by offering its first glider kit, designed by the old master himself, Carl Goldberg. The model goes by the rather dainty name of "Gentle Lady” and is intended for beginners to R/C and also for com­ petition in 2-meter glider events. Con­ struction is as conventional as could possibly be made for the benefit of the novice builder. This, with the helpof the outstanding instruction booklet (one of the best we've ever seen), should keep first-time builders from making any gross mistakes that can't be corrected. The kit is typical Goldberg: first-rate plans, die-cut parts throughout, good or wherever your parts just don’t fit at Tom Thumb Sky Tracings, a small hardware, shaped l.e. and other parts, together like they should. The new glue (right now, that is) plans service that etc. The airplane spans 78-1/4 in., has 663 is called Hot Stuff Super "T” and is quite specializes in 1/2A R/C sport and scale sq. in., and weighs 25ozs. with 2-channel a bit thicker (is that where the “ T” comes models. Three plans are now being radio installed. The plans and instruction from?) than regular Hot Stuff. It is offered, and several more are in various book also show how to build the wing formulated to have a cure rate of from 10 stages of design and building develop­ with removable tips (it's normally a one- to 25 seconds, giving you at least a little ment. The three models are: piece wing) in case you are driving a time to position your parts after they are 1) A stand-off scale Piper Vagabond, small (really small) car and can’t get the mated. Also, because it is thicker, it can 32-1/2 in. span, 191 sq. in., for two wing inside. fill small gaps left hy poorly-fitting parts channels and a Cox Golden Bee. The Gentle Lady’s contest record and can also be applied as a glue fillet in 2) The "Cheat-Uh.” a sport design for remains to be seen, but competition each joint for extra strength. How about two to three channels. Golden Bee or fliers shouldn’t let the name put them that? Here’s a cyanoacrylate that gives Tee Dee power. Span is 36 in., area is 250 off. The airplane is said to react very you the forgiving qualities of "conven­ sq. in., trike landing gear. quickly to lift, can be circled tightly tional" glues plus all of the strength and 3) The "Soar-Head Six,” a 72-in., without dropping a wing, and will most of the speed of regular Hot Stuff. V-dihedral glider for high-start, slope,or penetrate well. And. like regular Hot Stuff. Super "T” .049 engine power. Area is 520 sq. in., The Gentle Lady kit sells for $24.95and comes in 1/4, 1/2. and 2-oz. bottles. weight is 24-26 ozs., wing loading 6.6-7.2 is now on your dealer's shelves, or you From Satellite City. P.O. Box 836, 695 oz./sq. ft. can order direct from Carl Goldberg Laguna Dr.. Simi. CA 93065. The plans are drawn full size and Models. 4734 W. Chicago Ave., Chicago. include all necessary patterns. They sell IL 60651. for $5 each, or all three for $12. Best bet Tom Houle, who presented the con­ would be to send for the free catalog, struction article for that big rubber- which describes each design in more Satellite City has a new type of Hot powered Mr. Mulligan way back in the detail and which also gives full ordering Stuff, for use on less-than-perfect joints Oct. '75 issue of MB, is the man in charge info. Write to Tom Thumb Sky Tracings,

New type of Hot Stuff glue from Satellite City. A Piper Vagabond built from plans available from Tom Thumb Sky Tracings.

8 R/C MODEL BUILDER Two new kits from Sterling; above, the "K ris Kraf" cruiser, and right, the "Viper" 1/2A C/L stunt model. 11333 N. Lake Shore Dr., Mequon, Wl Pohlmann. as a replica of his own full- 53092. size 172. It’s already a proven contest * * * winner, too; among other meets. Hank used it to place first in Sport Scale at the Our own Bill Hannan has written a 1979 Mint Julep and also at the 1978 book that could be accurately called the Gateway Championships. BV BILL HANNAN "Bible of Peanut Scale.” The book is The new Cessna uses the same type of A WOULD OF TIN» FLYING SCALE MOOELS called Peanut Power! and covers in great "Kwik-Bilt” fuselage construction em­ detail anything and everything you ployed on some of the other Sig scale could possibly want to know about the kits, in that the real fuselage consists of a tiny fliers. Subjects include history, scale solid balsa center profile, reinforced research, construction, prop carving, with plywood doublers, to which the covering, finishing, detailing, design, engine, radio, landing gear, and tail are flying, troubleshooting, contest flying, all mounted. The 3-dimensional shape and a lot more. In addition, the book comes from molded ABS plastic shells features full-size plans and complete which are attached to the keel. The building instructions for a BD-IV.a good shells carry no flight loads and are in fact choice for first-time builders because of only for decoration, to add the scale its all-straight-lines design. shape. The rest of the model is of Bill has spent about 2-1/2 years on this “ regular" construction and is designed project, and I think anyone who sees it for quick assembly. will agree that it was time well spent. "Peanut Power", Bill Hannan's new book deal­ Some of the other features in the new ing with all phases of Peanut Scale. Peanut Power! is on an 8-1/2 x 11-inch Cessna kit are cut foam wing cores, format, 80pages, over 140 photosand 85 molded plastic cowl and wheel pants, the “ Sparrow." a two-channel (ailerons illustrations, and all presented in Bill's formed clear windows, simulated corru­ and elevator) R/C slope glider. It uses unique, informative, and always enter­ gations for the flaps, ailerons, and the 36-in. Ace tapered foam wings, a taining style. elevators; formed aluminum main gear, two-piece molded plastic fuselage, and The book is being published by Paul coil spring nose gear, full hardware a wood horizontal stab. Aileron hard­ Matt, of Historical Aviation Album fame, package, aluminum engine mounts, ware, a nylon clevis, and nylon elevator and sells for $7.95 plus $1 postage decal sheet, and even a factory 3-view of horn are also included, as is a set of (California residents add 6% sales tax). the full-size aircraft. minimal building instructions (to keep You can order from Historical Aviation The model spans 65 in., weighs 7-1/2 kit production costs down). Retail price Album, P.O. Box 33, Temple City, CA to 8 lbs., and requires a .60 and 4 to 5 is $19.95. 91780. channel radio. Going price is a mighty Specialty Models, P.O. Box 1819. reasonable $89.95. Canyon Country, CA 91351. From Sig Mfg. Co.. Montezuma. IA Φ * · Sig’s sport scale Cessna 172 Skyhawk is 50171. finally being released to the modeling Sterling Models has two new kits * m * public after many months of develop­ designed for .049 size engines. One is ment. The model was designed by Hank Specialty Models is producing a kit for the “ Viper,” a 1/2A control line sport/

Two new engine mounts from Tatone, for the O.S. .60 4-cycle Another addition to MRC-Tamiya's line of R/C cars, the Ligier JS9 (left) and most modern Pattern type engines. Matra Competition Special.

MAY 1980 9 Sig’s latest kit is a Sport Scale replica of Hank Pohlman's Cessna 172, for .60 engines.

speed needle is located in the barrel The “ Super Drive” is a new gearbox itself and moves across and partially from Aeromarine Enterprises that is Aeromarine's new "Super Drive" gearbox for obstructs the fuel jet as the barrel is designed especially for use with large chainsaw type boat engines. closed, thereby reducing the fuel flow. chainsaw type engines, to take advan­ stunt model that looks like a perfect step This type of carburetor is claimed to be tage of their low operating cost while at up from beginners’ type profile models. very easy to adjust and makes for no the same time giving the same per­ The kit features “ on the board’’ wing hesitation when going from idle to full formance as a nitro-guzzling racing .60. construction, due to the diamond­ power. The Super Drive turns the prop at 2-1/2 shaped airfoil, and a simple built-up Bavarian also has a new powerplant times the engine speed (for example, fuselage to provide valuable building designed especially for our rotary-wing 4,000 rpm at the engine gives 10,000 rpm experience. A good-looking fun ma­ friends, the Model 7000 Chrome HB .61 at the prop) and is said to be ideally chine. the Viper kit sells for $12.95. Helicopter engine. Highlights of the suited to the Quadra, Super Hustler. Sea The other model is a boat, a realistic- brute are Perry Directional Porting, Tiger, and other large ignition engines looking cabin cruiser, called the “ Kris double ball bearings on the shaft, currently in use. Kraf.’’ It is 19 in. long, 6-3/4 in. across the chrome-plated sleeve, large heat sink The Super Drive uses an aluminum beam, and is well suited to .049 gas or cylinder head for good cooling, and the case for light weight and is anodized to even better yet. electric power. The hull new carb described above. The whole prevent corrosion even in salt water. The is molded plastic and is strengthened thing comes complete with extra screws, two 1/4-in. stainless steel shafts are each with an easily built inner framework. Allen wrench, prop balancer, and in­ supported by two stainless steel double- Going price on this one is $19.95. struction manual. shielded ball bearings, for smooth and Both from Sterling Models, 3620 G St., For more info, w rite to Bavarian easy running. The unit measures 5 Philadelphia, PA 19134. Precision Products, P.O. Box 6. New inches wide by 2 inches deep by 4 inches * * * Canaan, CT 06840. Continued on page 102 MRC-Tamiya is bringing out yet an­ other electric R/C car kit. this one being Tatone Products is announcing two a Ligier |S9 Matra Competition Special new additions to its fine line of alumi­ used in Grand Prix racing. The model is num engine mounts. The Model 3200 isa 1/10 scale and features the same fine low-profile mount designed for the detailing and quality to be found in the new-generation .60size Pattern engines, other MRC-Tamiya kits. and Model 3300 fits the popular O.S. .60 Some of the car’s more noteworthy 4-cyde engine. Both are molded from features are the Mabuchi RS-540 motor, tough “ X-100’’ aluminum, are hand the same one used in the other MRC polished and have a satin sand finish. cars; the proportional speed control for These mounts are normally shipped both forward and reverse; the ball undrilled, but you can get them drilled bearings in all four wheels; the servo for your particular engine if you request saver in the steering linkage, which it, and they will do it for the best possible protects the steering servo from damage price: free for nothin’! in case of a crash; and the sandwich type The new mounts are now in most front wheels. These have a hard rubber hobby shops; the No. 3200 sells for $10, middle for good traction in thestraights, and the 3300 will set you back $14. See with soft sponge rubber on both sides your dealer or contact Tatone Products, for a good grip through the turns. The 1209 Geneva Ave., San Francisco, CA rear tires are solid sponge rubber. 94112. Suggested retail price is $89.98. You can find out more from MRC. 2500 Woodbridge Ave., Edison, NJ 08817. ♦ * * Bavarian Precision Products has a new R/C carburetor designed especially for the HB .40 PDP, HB .50 PDP, and HB .61 PDP. The new carb is a single-jet, two needle valve type that is easily dis­ tinguishable from the older carbs pre­ viously supplied on these engines. Features include a barrel which, as it rotates toward the idle position, moves axially across the carb throat toward the "Sparrow" slope glider from Specialty New carb (top) and .61 Helicopter engine fuel jet and high-speed needle. The low- Models. trom Bavarian Precision Products.

10 R/C MODEL BUILDER INSTRUCTOR

Conducted by DAVE BROWN 8534 Huddleston Dr. Cincinnati, OH 46236

• With the number of unanswered Dear Dave, would also like to know the limits for letters I have this month, I’d better not Let me first say that I enjoy your planes to be entered in the Pre-Novice soapbox too long in this issue, but rather column a great deal, and I hope it has a or Novice classes in Pattern. What get to answering a few letters. But before long and productive life in R/C Model engines, planes. e()uipment, etc. are I do, I'll answer the most common Builder. allowed? Would a Dirty Birdy 40 fill the question asked of me lately. Yes, I have My problems do not directly deal with hill? gone into business for myself and have the flight aspects of our favorite pastime, Keep up the good work, and good bought the Southern R/C accessory line but are associated with the construction luck in your upcoming contests Kevin and will be manufacturing it and selling of our planes. First, I would like to know DeVenny. it through distributors and dealers the proper procedure for applying dope I don't know offhand of any way to across the nation. Check with them if over films such as Solarfilm or Mono- make dope stick to most covering films, you need any of these products. The kote. but I do know that epoxy paints can be answer to the next most common ques­ I started flying on a Sig Kadet, which made to work reasonably well. I’d tion is Yes, I am still closely associated performed fairly well, until a bad land­ recommend that before trying to get any with World Engines and am continuing ing on asphalt tore the fin and half of the paint to stick to plastic films, you to do engineering work for them on a stab off. After repairing these. I decided roughen the surface slightly with some consulting basis. Now, with that out of to apply a color trim over the previously steel wool before primer and paint is the way. I’ll get on to some letters. solid white Solarfilm finish. I applied applied. Dear Dave, some Aerogloss dope over the intended Dear Dave. I am presently 75 and my first R/C is a portions and let it dry. Congratulations on your 2nd place at Hobby Lobby Recruit. Although I love When the dope had dried, I noticed the World Championships I have been F/F, I would like to try more R/C. I have a that the dope was starting to peel off. flying R/C models for two years now two-channel set. Could you recom ­ The surface had been cleaned prior to with a great deal of enjoyment. Right mend a more contest winning plane for doping, but the humidity was somewhat now I am flying an Ugly Stick and feel two channels? Also, I would like to know high. Now I wonder if I should employ rather comfortable doing so. My plane the hazards of flying in winter . . . the same method when finishing my flies well and is very predictable. I would damage to radio? Does the weather RCM Trainer, as I already have the like to learn to fly Pattern airplanes and affect the plane’s flyability? Should I materials for doping over Solarfilm. compete in Pattern competitions, hut I mount skis on my plane? How will my If you know a good way of applying have been steered away from low-wing engine (Cox Golden Bee) be affected, or dope over films, please let me know. I Continued on page 83 should I change from standard Cox fuel to something else? I enjoy your column and always look forward to reading it. leff Hamilton. Other than some standard class glid­ ers, very few competition airplanes use two-channel radio systems. However, a two-channel system can be used for many high performance airplanes, such as the Mach-None and the Fun-X 1/2A Pattern models. Cold weather creates some problems when flying R/C and requires some caution. The batteries in your radio system lose capacity in cold weather and cannot be expected to safely fly as many flights as in warmer weather. As far as the airplane and engine are concerned, they tend to perform better in cold weather, but you can expect the engine to be harder to start and should be particularly careful in inspecting any plastic parts, such as control horns, as they break far more easily when cold. Your normal fuel is fine in cold weather, but a little auto­ motive starting fluid or lighter fluid for "When you're facing the plane, did you say left was right?" priming may be helpful to aid starting.

MAY 1980 11 Chris Van Deventer III, Rockford, Tennessee, with his Thermic 210, a three-times blow-up of the classic Thermic 70, designed by Frank Zaic. Not evident in this photo are the built-up ribs for all flying surfaces. Only design change is addition of spoilersand ailerons. Flight report to come.

By BILL NORTHROP WORLD PHOTOS BY AUTHOR • Radio control, over the years, has had Ace has always been the “ Heathkit” of it-yourself R/C’ers (speaking in terms of many prominent leaders whose names, R/C modeling, as Paul has specialized in R/C systems) has dwindled to a very low faces, and accomplishments have been producing kits for many of the elec­ number, Ace R/C’s receiver, servo, and known to most everyone, past and tronic ideas developed by modelers transmitter kits continue to be popular, present. However, we venture to guess and/or published in the model publica­ both for money savings and for those that one of the most effective R/C tions. With his help, R/C’ers were able who wish to learn a little more about leaders, a person who has done more for to turn construction articles into work­ their radios than merely how to charge the hobby for a longer period of time ing reality. As examples, Paul made up them and turn them on and off. than most anyone, is relatively unknown and marketed complete kits for Walt In recent years, Paul’s son Tom has to the modeling public. We're referring Good's famed TTPW system, the fore­ been moving more and more into the to Paul Runge (pronounced Rung- runner of proportional radio control, left seat of Ace R/C. and so it was not ghee), and for the past 27 years, he has and Phil Kraft's single tube receiver and that much of a surprise, but still a been the owner and operator of Ace companion transmitter, both of which significant occasion, when Tom and his Radio Control, Box 301, Higginsville, launched many a modeler into success­ wife, Donna, took over complete com­ MO 64037, the same address as the day ful control of models by radio. Even mand as of the first of the year. he founded ihe company back in 1953. today, when the percentage of design- If we were to discuss all the R/C type things Paul, with the help of his charm­ ing wife Bobbie, has accomplished, including the publication of the famed “ Grid Leaks" memos, which became newsletters, which became a slick maga­ zine, we’d run out of space in no time. Better that you should ask someone who was around for the first Vari-Comp escapement, the first hand-held trans­ mitter, and remembered how to wire up a Gem relay, four pencells, and a Mighty Midget motor for real honest-to-God Galloping Ghost. Enjoy your retirement, Paul and Bob­ bie, and please come to see us! OUT OF THE WOODWORK Attending the WRAMS show in White Plains is always like a home town re­ union to us, as most of our active years in modeling, and particularly R/C. took place on the mid-East Coast. Seeing some of our OFB’s (Old Flying Buddies) every year is always a kick, but this year it was just a little extra special, as who should come by the RCMB booth but 12 R/C MODEL BUILDER "Jersey" Jim Martin, former U.S. FA I R/C Aerobatic team member (1973) makes first test hop of the Executive Engines (now Technopower) 7-cylinder radial in a 12-1/2 lb. biplane. Don Brown, with Quadruplex transmitter, and Tom Brett at a DCRC Symposium about 1962 or 63. Both were on the U.S. 1962 FA I R/C Aerobatic team. Tom became World Champ, and Don placed 5th. Team was 2nd. Willis Robinson placed 9th. See more in text. Don Brown, former manufacturer of one of, if not the first, proportional system, Quadruplex. Don still lives in the Pitman/Woodbury area of New Jersey, and has been getting back into the old game after many years’ layoff. Doug Spreng, Don, and Tom Brett placed 1st, 2nd, and 3rd at the 1961 Philadelphia Nats, to become the U.S. FAI R/C Aerobatic team to compete at Kenley RAF base outside of London in 1962. Doug was later replaced by 4th place winner Willis Robinson, of Las Vegas, when Doug had to withdraw. Tom Brett, now deceased, won that World Champs, and the U.S. team was 2nd, with Don in 5th place, and Willis in 9th. At the time, Don’s was the only proportional system at the Champion­ ships, and it stirred up a lot of interest, as it was engine problems that kept him from being the probable winner. After many successful years of devel­ oping and producing the Quadruplex systems, Don retired from R/C to pursue another interest for which he had a strong desire . . . full-size inboard boat racing. Flis decision was to "take a fling at it before I get too damned old to drive the things.” His usual thoroughness brought him a string of successes... Now, looking as slim and trim .. . and not a day older than when we last saw him about 12-15 years ago, he’s re­ discovering the fun of flying again, with a Mach I pattern bird. Son-of-a-gun .. . forgot to ask him what radio he's using. BROOKE MODEL PRODUCTS Ralph Brooke, two-time R/C Aero­ Sketch shows alternate flat gear set-up for synchronizing rotor blades in the Synchrogyro (Sept. batic World Champion and well-known 79), also shows suggested change of rotation direction for improved performance. See text. Continued on page 104 Photo above is of first experimental free flight Synchrogyro by designer Georges Chaulet.

MAY 1980 13 • Who doesn’t know of the flamboyant Curtiss P-6E Hawk fighter, with its talon­ decorated wheel pants? What a sexy airplane! Unfortunately, this is not the story of this colorful AAF pursuit ship, but rather its all-silver, not-so-gawdy granddaddy. the Curtiss F6C-1 Hawk (alias P-1A). The fighters of the mid-twenties were virtually monopolized by Curtiss and Boeing, and many of the designs looked so similar that it is a wonder that the pilots of the day could keep them straight. But it was Curtiss with his racing expertise who set the trends of the early decade, with the characteristic ever- sharp pencil nose of his biplanes being

the trademark of the early Hawks. The PHOTOS BY AUTHOR last of the double-bay biplane fighters, the Curtiss PW-8, won acclaim with Lieutenant Russell Maughan’s dawn-to- dusk transcontinental flight of 1924. From the PW-8. it was a quick design shuffle to the Army’s P-1A. A tunnel radiator replaced the wing skin radia­ tors, and tapered wings were fitted for greater maneuverability. While the Army was getting all the glory with the P-1 A, the Navy seemed content to play “ follow the leader,” and the P-1A Curtiss became the Navy’s F6C-1. The -1's were only five in number, being used as evaluation prototypes. Production By EUGENE MARTINF6C-1 ... A highly detailed 2-inch scale model of the models were F6C-3’s. Navy version of the Arm y's distinctive P-1 Hawk (see Pete Westburg's The Hawk flunked its catapult test, but scale drawings in this and the preceding two issues). Text includes a it did prove to be a reasonable carrier- wealth of detailing techniques of use to all scale modelers. based aircraft. (See the Red Ripper Squadron in U.S. Naval Fighters 1920 to forward of the center of gravity, which pounds. Interestingly, the extra weight 1980, by Loyed F. Jones.) The Navy didn't usually means good ground handling. had no effect on the performance of the particularly favor the Curtiss V-1150-1 Finally, the amount of scale detailing model. twelve-cylinder inline water-cooled required would be simple and at the RCMB’s editor asked me to include engine. It was too heavy and the vulner­ same time interesting enough to make a some construction and finish notes on ability of the chin radiator was discon­ very competitive model. building the Hawk. After restudying the certing. So, the Navy Hawks were re­ Since my building practices were plans and retracing my building steps, I engined with the P&W air-cooled Wasp. totally oriented to kits, I decided to keep decided there are only a few areas With this transformation to the radial the structure of my Hawk as much like worthy of comment. Being an all-balsa engine went the distinctive deep chin an out-of-the-box kit model as possible. airplane, there are no exotic materials to and the beauty of the needle-nosed The plans, therefore, are just like some­ chat about, and I’m not about totell you streamlined cowling .. . lost for the sake thing you would find in a kit. You can be scale buffs how to glue wood together. It of a mere 1-mph gain in speed. sure there are no surprises in store for is an honest model to build for anyone The genius of my Hawk model was you if you build this model. who can follow a set of plans. The actually a spinoff from an old “ Giant Kit’’ One of the most important design materials and hardware are called out by of the F-11C-2.1 had built thekit.onlyto features of my Hawk is its light weight. I manufacturer and item numbers. All discover when I went looking for docu­ set 7-1/2 pounds as my goal. The judi­ required patterns are also on the prints mentation that themodelwas totally out cious selection of woods and the use of and called out by name or number, or of scale. I used a Wylam plan book to Monokote kept the Hawk at its target both. check out the discrepancies, and as I weight. However, since the Scale R/C It should be noted that the wings get leafed through the pages, my fantasies Modeler article, a new landing gear has progressively thinner toward the tips. began to wander to some of the other been made (full scale, including shocks) This thinning happens equally on the biplanes illustrated. A two-page drawing which has increased the weight to 8 upper and lower surfaces of both the top of the F6C-2 caught my eye, and soon I was planning its probable success as a scale subject. I recalled a mention by Dave Platt in his book Scale In Hand. He said. 'How about the P-1? It should make an excellent flying scale model." Further examination revealed the streamlined cowl was deep enough to conceal the engine and exhaust system, and I would also not have to detail a radial engine. The fuselage was a simple box with no compound curves or intri­ cate structures. The wing sported a Clark-Y airfoil, and the tail surfaces were extremely generous. The landing gear had large wheels (to help avoid nosing All set for touchdown at Mile Square Park, Fountain Valley, California, during a recent "un­ over) and the gear was mounted well contest" held there. Well-known scaler. John Lockwood, was at controls for this shot. 14 R/C MODEL BUILDER MAY 1980 FULL SIZE PLANS AVAILABLE - SEE PAGE 108 15 least 20 grains per inch. Finally, front spars of the lower wing should be steamed and jig bent at the 1-1/2° dihedral bend points. Note: the F6C-1 is capable of very vigorous maneuvers. Therefore, use the best material you can find for the spars. Also, the flying wires are a functional part of this model. The nylon clevises on the ends of the wires allow for breakaway, if necessary, as well as ease in assembly. The tail carriage is built as a separate unit and is held to the fuselage with four No. 2 screws or four spots of 30-minute A close-up of the top wing, showing the fittings that must be installed before covering. Requires some extra care and patience when it comes time to cover. epoxy. I used the screws, allowing me to remove the tail easily if necessary. Also, I find it easier to build a model in modules which can be built separately and then be plugged together. The real planesare made this way, why not the models? As builders, we all want ways to control the amount of damage to our models in minor mishaps. If a tail carriage.attached in the manner described, snags an obstruction, it will break away from the fuselage rather than taking half the fuselagewith it. Let me emphasize again, the flying wires in the tail carriage are functional. The fuselage, as you can see, is of standard construction, except I like to use 1/4-inch square hardwood (spruce) main frame stringers. The hardwood Servo in bottom wing drives aluminum torque tubes that connect to the vertical pushrods that makes for stiffer construction. Here I actuate the top wing ailerons. Pushrods exit wing from hole in lower left of photo. would like to talk about glue. I find 30- minute epoxy or white glue a must in and bottom wings. Therefore, the upper inch boards. Set the two boards on one high stress areas. Five-minute epoxy wing, which hasn’t any dihedral, isn’t flat flat 1 X 12 X 72-inch board. Using nails, tends to pop loose like an old scab. on its lower surface from tip to tip, and it secure the two boards to the baseboard However, I discovered a marvelous use would rock on its center rib if set on a flat at the center only. Then lift and block for five-minute epoxy. The nose of my plane. The same is true if the wing is the two boards at the outside ends to the Hawk has four coats of five-minute turned over and set on its upper surface. bottom contour of the wing. When epoxy mixture on it. The mixture is five- Only the center line of the upper wing alignment is complete, secure the two minute epoxy thinned with M.E.K. to the will be true to the flat test plane. On the boards at the wing tip ends. A jig of this consistency of water. The M.E.K. will lower wing, which has 1-1/2° dihedral, type can be adjusted to accommodate keep the glue from hardening until it has the dihedral is not set to the flat-bottom both the upper and lower wing of the evaporated and will allow the glue to surface of the Clark-Y airfoil. The wing is Hawk. Note: the rear spar of each wing penetrate completely through the balsa. again constructed around a common already has the proper tapers built in Brush the mixture on all outside and center line, and that center line is where and can, therefore, be used to assist in inside surfaces on the planked nose the 1-1/2° dihedral is set. Therefore, if setting up the wing building jig. section of the Hawk. Besidesstrengthen- by chance the dihedral is measured on On both upper and lower wings, the ing the nose of the model, the mixture the bottom surface of the lower wing, it spars are one piece. They are not spliced will stop the wood from soaking up fuel would be somewhat more than 1-1/2°. in the center. Select the wood for the and oil. Building wings of this type can be spars very carefully. The grain should I would also like to pass along a neat difficult. The task can be made easier by not vary more than 15° in the entire method I have for aligning the cabanes. building the wing in a jig. A simple jig length of the spar. It should not have Once the bottom wing is seated on the can be made by using two flat 1 x12x 36- more than a 10° slash, and should have at fuselage and aligned with the stabilizer

The basic tail surfaces, N-struts and two small access panels. Simple Tail surfaces are controlled with cables strung through small nylon structure in tail. tubes. Also note short lengths of cable tube in stab.

16 R/C MODEL BUILDER MAY 1980 FULL SIZE PLANS AVAILABLE - SEE PAGE 108 17 The wing jig in use. Proctor wing attach fittings are silver soldered to cabane wires when everything lines up properly.

Rudder and elevator servos are connected to quadrants which drive The basically complete fuselage structure. Not really as difficult as the control cables. Standard Nyrod used for tailwheel. it may first appear. and thrust angles, the cabanes are fitted controlled quadrants, which operate the points. Tack and seal the Monokote to the fuselage and left extra long. Then control surfaces through flexible cables. around the attach points first. Then pull a box-like structure, much like a scaf­ However, most builders have their own and stretch, tack and seal the balance of fold, is temporarily tack-glued to the system of controlling a model, there­ the lower surface of the wing. When I fuselage sides. This is simply four balsa fore I do not show a control installation. attach Monokote, I stretch it, cold, almost to the point of breaking balsa. uprights with longitudinal crossbars I do, however, show how to make and That way, when it is heat shrunk, the onto which the wing can be set. These install the aileron torque rods in the Monokote will resist sagging in the sun. horizontal bars are pinned so that they lower wing. These rods have been are parallel to the fuselage crutch, which carefully tested. Do not make your rods The tops of the wings are done the same serves as a datum line. The wing is placed from plastic or music wire, as it will twist way, except the cutout situation is in the cradle, checked for trueness, then too much and cause aileron flutter. Also, reversed. After the wing is covered, the Proctor clevises are soldered to the do not change the size of the aluminum make small Monokote rectangles with trimmed cabane wires. Now the scaffold tubes. If you must change something, slots in them. Make them just large is removed and presto! Instant wing change to brass tubes instead of alumi­ enough for the attach point lugs. Care­ alignment. I would also like to state at num. The weight will not affect the fully attach and seal these rectangles at this point that the incidence angle of model, and the wear factor of brass is each attach point lug on both wings. The both wings is a negative 2°. This inci­ superb. fuselage and tail are covered much the dence is set on the flat bottom of a As for finishing, I chose Monokote as same way, by stretching, heating, ex­ Clark-Y airfoil wing; not through the panding, using cold, wet cloths, and center line of the wing. Again, when the covering. It is light, easy to handle, and reasonably strong. However, before finally heat shrinking. All surfaces of my designers using the Clark-Y set the Hawk are covered with Monokote. This incidence they use the flat bottom as the I covered the model, I completely assembled all components including all means even the cabanes, fairings, blis­ datum plane. The incidence of both ters, and cowl. Even the fire extinguisher controls, wires, wheels, motor,etc. After wings on the Hawk must be set at a -2° is covered with Monokote, except for on that datum plane. everything is checked and adjusted as required, disassemble the model for the red handle and black ends. The only paint I used was on the wires, spinner, The landing gear (standoff version) is covering. The wood is prepared by shown on the prints. The static scale careful sanding, the last sanding being wheels, cockpit detail, and final trim. version is on the second sheet. Both are with No. 400 paper. Then the entire Raised panel lines on the upper interchangeable and are attached to the model is painted with two coats of portion of the fuselage and at the access fuselage as a module. The gear can Balsarite. First I cover the lower panels of doors on the wings can be made by therefore break away if snagged by the wings. I used one piece of Mono- outlining the panel with 1/8-inch white some obstruction. I find that silver kote for each wing. The lower wing is striping tape. (If you use a darker color, it solder is the best way to assemble the easy; however, on the upper wing, the will show.) The tape bond can be landing gear. However wire-wrapped location of the wing attach pointscreates straightened by passing a sealing iron 60-40 solder joints will work also. They a problem. Carefully cut rectangular over it. Set the iron at lowest heat. Then are just bulkier. slots in the Monokote to accommodate cut a piece of Monokote from a pattern The controls of my Hawk are set up these attach points. Then slowly stretch to the exact size of the panel. Next, lay just like the real plane. I use servo- and work the covering over the attach the Monokote over the tape and seal it

18 R/C MODEL BUILDER The author put considerable time into the detailing of his Hawk, as these photos show. Monokote covering was used throughout, then the model was given two coats of clear epoxy paint as a sealer. Text tells how to make Monokote look incredibly like a fabric covering. to the tape. Now start at the center of the beads cut in half. Each half is Hot Stuffed inch black trim tape to give the illusion panel and touch seal it down. Work to the model, then a .020aluminum wire of depth. Flush panels are made from slowly toward the striping tape, sealing is slid into the remaining half-holes of trim sheet the same color as the model. as you go. Be careful not to overheat, the beads. The wire is cut to length and Then, before the backing is removed, especially next to the tape. Finally, wet, bent over on the ends. Finally the beads the edges are colored with a black felt- cold cloth in hand, quickly pass the are painted the same color as the model. tip pen. This gives the illusion of a seam sharp point of the iron along the inside It looks just like the real thing. The panel instead of a line. edge of the tape, and just as quickly pat it screws are common pins with a black I made my own instruments, however, with the wet cloth. When repeated on all slot painted on them. The hooks for the it would be easier to buy them from sides of the panel, the result will be a lacing are common pins Hot Stuffed into Tatone. The gas caps are made from a beautiful raised-edge panel. If the the balsa backing. The lacing is black 3/8-24 thumb-nut, the kind that holds panels are set progressively one on top upholstery thread Hot Stuffed to the the glass to your bedroom light fixture. If of the other, start with the lowest and pins. Finally, the laced panel outline is you set up your model for the slipper work to the highest. The results will be defined by a very fine black thread. The tank, the rivet detail on the tank is the impressive. One other point. Monokote crank is made from balsa painted black, old white glue routine. However, I find it has a grain. When simulating panels, and the handle is covered with black works much better with the sharp point rotate the grain. Light will then reflect friction tape. The bomb sight is made of a toothpick. The lettering on my differently from each panel, enhancing from an old ballpoint pen and its cap. All Hawk is done with dry transfers pur­ the beauty of your model. the holes or cutouts that are not func­ chased at the local stationery store, and The wire studs simulating the panel tional are simulated and are made from hold-downs are made from small wood black trim sheet and outlined with 1/8- Continued on page 90

Two more closeups showing the cockpit and tail surface details. Stab wires are functional and can be easily disconnected for stab removal, if necessary. Note elevator control cable passing through stab.

MAY 1980 19 Ο * Λ í 5 5" κϊ'ϊ; ■» 1 S. IDs Γ " rSi O3 0« o o o Λ $ *r ϊ: Λ a Λ,ο Ο Ο οΐο1 5 ■o S!S s: Oh op '»'Jí *· ο ο ο ο S ♦ M * — ' ϊ : ♦ -V Φ 3 « * spa :=Ε a o ř ! “ -I* "< = Sj,o o o o o % rtO ■ r s* 2:■*#>··;es ¥ a3*x ' Λ ■* *■ < o \ Í: 'L·. S s sis

χ\ΝΝ.w β» 0 0 0 S « Ι=| 0 Ι ϊ Λ2 : ο ο ο 2 * S£i 3 "?Γ ί 2 i3 2«*»» ο ο» *· ο** οΛοr> ο 5“ τ "i Οο ο οο ο L\ ■ τ η : γ : ■

L

f ) % Γ

20 R/C MODEL BUILDER Head-on shot of the original P-1B tested by McCook officials in I927. Tapered wings show up well, as does the experimental Hamilton Standard adjustable blade prop. Color is khaki overall with aluminum wheel discs. CURTISS @ ® MB By PETER WESTBURG

(Conclusion) <9 XPW-8A borrowed the tunnel radiator design, had thicker, shorter wings with a single bay of struts. Aircraft was still less maneuverable than the PW-9.

Instruments on the P-1B were mounted wherever there was room, as Tunnel radiator on P-1A was different from that of the P-18. Prop shown in this handbook photo. on Curtiss D12 engine is twisted from an aluminum plate.

Radiator on PW-8 was hundreds of small brass tubes laid chordwise This is a Curtiss P-1C, easily recognizable because it was the only on top wing. Faster but far less maneuverable than PW-9. Hawk without a headrest.

MAY 1980 21 PHOTOS BY GREGER MÅRTENSON Sm yas g oe f h publica­ the of one ago years Some • ee nw t m. eety came I Recently me. across the upon to listing andthat reflected known were that scaleness" “ of and degree kits the cating model A of of S list U a old ulated good form the in here tions d ta toe is eeae. Such generated. kits those that ads couldn’t I modeler. scale the early offered those efforts accuracy of degree kits, several mostthe of with had experience not had I While offered. kits those system indi­ grading of asort provided solutely accurate” could be found. Very be found. could accurate” solutely the someof in and there reflected were curacy but the completenessof asthe kit the completenessof but curacy order to make the models flyable. models the make to order in the accuracyconsideration into crept drastically, and a myriad changesof other left scaleness” “ the however, often, ab­ “ and scale” true phrases as "100% el I adto t te nrae n the in increase the to addition In well. larged, wing tip airfoils were thickened thickened were airfoils tip wing larged, smile a but help at bit that the comments ore o ifr to ta cn be can that modeler. the by ation obtained inform of sources ac­ the only not on placed been has last the general in kits the to happened uh o e eie. tb wr en­ were Stabs desired. be to much the model. This may also includefurther This model. may the also atincludefurther of form some include now kits the emphasis stronger much A years. few least a rudimentary documentation for for documentation rudimentary least a of many offered, advantages material slowest. (and WW-I discovered. be can era any dominate to seem periods time certain has aircraft as developed Of course, well. hr o hw hs kt dvlp and develop kits these how or where the developed probably has prior) almost such as but offerings, the W-II, W 22 t s o odru t nt wa has what note to wonderful so is It A whole wide range of available available of range wide whole A The average modeler might wonder wonder might modeler averageThe yBB UNDERWOOD BOB By with a considerable amount of work work of amount considerable a with has who world first translated aircraft the the translating seeexperts these would Here we is thought. an complex exciting the on product a become eventually required to bring the plans (if they evenplans they the (if bring to required con­ then is builder The photos. and at com­ magazinearticles contestsand petition through manufacturer the of tion isit amodeler veryoften model, the out the into linessome of aircraft great fluid manufacturer’s the in boards drawing desksand over huddled designers and atd n te rcs bgn, usually begins, process the and tacted atten­ the to comes then model The it. by a model, scratch-building into flyable modeling the of corner far-off some in is it and the kit While concept a amodel. great-sounding of proportions reduced makers do indeed have to work at have laying work makers to indeed do engineers of bevya picture To market. tte'0Wrd Champs. World '80 the at support the U.S. scale team that will compete compete will that team scale U.S. the help support to NASA by sold being patch square eue-ievrino h oofl 3-inch colorful the of version reduced-size A C L ' SCALE 80 ’ construction problems, or just plain old old plain just or problems, construction rdcin costs. production the of credentials the degree some due to the flying characteristics, extreme due to flying the the on have will the model of the impact of selection the for judgments exist) to a workable level. workable a to exist) eln i sm wy, a lc the lack may sales large enough generate ways,to potential some in pealing viewing the original scratch-built model model scratch-built original the viewing oes wie hy r eteey ap­ extremely are they while models, sales. to but of He model, the must not only form consider the in public building His one. adifficult isoften very facturer at o osdr ht o cud be could you that consider to artist’s want done nicely very a or aircraft oe r l o te ouetto you documentation the of all or some have already you advice, scaler’s good aheadlike time, of looks actually aircraft create the ultimate model, in mostcases in model, ultimate the create the changes dictate often will and others problems knotty to solution the seeking hisof percent time to spend fifty content bemay well builder Theasscratch well. ieig a so ms otn n air­ in often most show may widening available. oee wo a dsge i. Some it. designed has who modeler kind what on bemustpredicated model the problems, but at leastatmay want you but problems, the before alsomight You subject. the of rendering (he model (he the model is. If you have followed every haveis.followed If you model the accurate how tell startto even can’t you have not a do The kit manufacturer must consider levels. range ability Theseof wide factorsconsider must manufacturer kit The level must kit The like. the and details changed, and you may be able to spot to able be may you and changed, with help to sections nose stretched Check for noticeable. more ablybeeven tapering narrow, Enlargedprob­ stabareastips. will wing very have that craft pared aid that will guidelines develop you that help compromises and problems the to make an effort. an make to of some answer to going say are honestly you can’t I how form. kit into it put model provided by the kit manufacturer, by the kit manufacturer, provided model the of bypictures are you going If need. persons. to great be might it While necessary. basic costs fora easeand construction of solution. workable simple a into these structural placement, ent equipm in a into model are complicated produce to kit practical scratch-built the late atrrs ie o te my e sub­ be may to soldmakers and they other by or contracted line, facturer’s manu­ the in model one than more date accommo­ to vary may These lastthree changes. pant wheel and canopy, cowl, The span. and chord include wing increased often These changes. outline kit scalest” “ the of selection your in speaking to two or let’s aspend moment make certain that they are pictures pictures are they that certain make he cannot limit thesalestoafewtalented thesalestoafewtalented he limit cannot problems. Landing gear position often is often Landingposition gear problems. Perhapskits.in can they be found might balance and equipm ent placement placement ent equipm and balance The decision on the part of the manu­ the of part the on Thedecision The compromises necessary to trans­ necessary to compromises The ic mn o yu r seig kits, seeking are you of many Since is ad oeot o ms b pre­ be must you foremost, andFirst Look for very obvious dimension or or dimension obvious very for Look before certain changes were made to to made were changes certain and not photos of the actual the of photos not and you look for the kit. If youIf kit. the for look you very good R/CBUILDER MODEL idea what the of of

A closeup of that incredible Damo. Uses standard Damo cylinders Yes, it do run, and very smoothly, too. Swings a 24x8 prop at just for a total displacement of 63cc (3.78 cu. in.). under 7000 rpm. Plenty of power for the Scout. want a scale type plane to fly around on Sunday afternoon. If, on the other hand, you are aiming at either competition or the rigors of creating the "most scale­ like model," you may need to consider these types of factors. If they are impor­ tant to you, plan ahead by determining how or if you can alter the basic kit to make it more scale-like. The common fault, as we have mentioned before, is to build the kit before looking for the documentation, and then moan about the fact that what you have done is proven that what you've built is incor­ rect. A little analysis ahead of time can result in a more accurate model with Distributor is hidden behind a cylinder, and is little or no additional work. virtually invisible when cowl is in place. Spark A closing thought concerns a com­ plugs for this beauty must cost a fortune. ment I read some years ago about the ability to scratch build more economi­ several manufacturers. Often, slight cally than to purchase a kit. If one Plugs are fired by a magneto, apparently con­ variations will occur to accommodate considers time as an ingredient, I would tained inside the radial engine mount. available commercial items, such as suggest that such a thought is very much wheels, spinners, etc. Logic dictates this out of the question. If you are consider­ 63cc. (That’s a little more than the size of as a practical matter unless, of course, ing materials only, perhaps it is possible six .60’s.) It is a four stroke, uses a the manufacturer wishes to produce the if something other than balsa is utilized distributor, O.S. .40 carb. and a magneto item specifically for the kit. Sometimes and the modeler has a large scrap box of for ignition. The 9kg model uses a 24 x 8 they will do this. items. Remember that you probably will Grish prop which it turns at 6900 rpm. You may note some of the economy have to buy a 36-inch piece of stock to Idle is in the 1700-1900 rpm range. moves made in the interest of holding get a shorter amount, while the manu­ Greger states, “ The most impressive down the kit cost and reducing building facturer can cut down on waste overall. thing is, of course, the authentic sound." problems. These can include such things Check out the kits available and you’ll I’ll bet that’s true! as the use of flat stock for the stab and find some really nicely designed and ANOTHER PATCH PLEA fin, where the full-scale ship of course packaged items. The commemorative patch designed utilized an airfoil section that was much WORD FROM SWEDEN by Mike Gretz and being sold by NASA thicker and would require ribs and One of the most lasting effects of for Scale 80, the Canadian Internats, is sheeting. Fuselage cross-section may be participating in international competi­ going great. The colorful patch is three compromised for the ease of using slab tion is the development of many friend­ inches square and sells for $2, with the sides rather than a full circular or oval ships. In Sweden, in 1976, the Under­ proceeds to be used for the team fund. section. If it’s an older type aircraft, little woods had the pleasure of meeting One disheartening bit of information things like wing rib placement, under­ Greger Mårtenson and his wife during has been received, indicating that the cambered airfoils, and scalloped trailing the competition. While they were not five teams necessary for official compe­ edges may fade in importance to the officials at the meet, as is so often the tition in control line has failed to mate­ designer of the kit. It is common prac­ case, they provided many services and rialize. This will result in control line tice in many kits to use solid or sheeted friendship. missing two successive competitions surfaces in place of built-up for such Greger has sent photos which I feel and casts grave doubts on the future of things as fabric-covered ailerons, eleva­ might interest the readers. The quarter- the event. Considering the increased tor, rudder, etc., which are often found scale Bristol Scout in the photos sports a activity in control line at the '79 Nats, it is in aircraft well through WW-II. The most unique engine. His good friend, on indeed unfortunate. obvious advantage in doing this is to the left in the photo, is Mr. Dal, who is Team Manager, Monty Groves, is facilitate construction and help with one-half of the Damo Company which is presently working toward molding the strength. presently manufacturing the twin that is R/C teams into a winning crew\ They are There are other considerations that imported into the U.S. The seven cylin­ going to make a very determined effort you may wish to develop, but in reality, der engine uses standard Damo cylin­ to see that those two trophies do not all this is quite academic if you simply ders and has a total displacement of Continued on page 93

MAY 1980 23 By DICK HANSON . . . Part Two: The Stall Turn and Immelman Turn.

THE STALL TURN It is very easy to let a slight crosswind good fast idle to keep the nose up and This maneuver is really beautiful when shove the model over the flight line if the rudder was not applied soon enough. properly executed, and the way you you accidentally stall turn downwind Or, if you hold up elevator after you present it can make or break the mental and that maneuver was done at 200 feet have reached the vertical position, the image of complete control which you altitude. The judges invariably yell plane will simply drift over on its back. have been trying to establish with the "DUCK!!” and your image fades notice­ Every design requires a slightly dif­ judges. ably. ferent technique for the stall turn, so just Let’s analyze it carefully. Practice the maneuver in all wind sort out the tricks one at a time. The rulebook stresses exactly level conditions, and pay particular attention THE IMMELMAN TURN entry, exactly vertical apex, a tight yaw to the use of rudder to hold position Here is a maneuver that will give you a (does not say stall), and a close parallel during the approach as well as the chance to use your aileron dual rate return path. vertical climb and return path. Remem­ switch. Most models lose speed when We can liken it to a 1/4 section of a ber, you will get docked points for tilting they are turned or are climbing. The loop, where the model reaches a vertical the wings to hold position, so get used to Immelman requires both, so the aileron position, then stops and returns nose- using that rudder! sensitivity usually decreases noticeably. first along the same path. In order to get maximum points, the The tendency is to get a droopy rollout The worst condition for making the judges must be able to easily see the because the ailerons are not as efficient maneuver look good is a gusty cross- entire top of the model as the turn is when the plane is flying slowly. wind. If your luck is anything like mine, executed. Here’s a technique which we The positioning on the entry is the you better get comfortable with flying in like: Establish the heading (remember to same as for the stall turn. adverse winds. allow for wind drift), and call the maneu­ We prefer a plane which flies a We will assume that the plane we are ver just before the plane passes in front moderate pace and has good vertical using is a properly set-up pattern type of you. Pause about a second and start a performance, so our positioning is which does not suffer from a diving deliberate smooth climb of constant closer than normal for high speed stuff. tendency when rudder is applied. Many radius (1/4 loop). The vertical position models do respond this way, and it Again, approx. 300 feet out is just fine. should occur at a point in space about You will get docked points for wing makes the stall turn much more difficult 45° to the side of the judges stand and to do properly. wiggles, so make certain that you are horizontally positioned to allow for locked on course before announcing What happens is that the nose pitches wind drift. The altitude is arbitrary and is down when you apply hard rudder even the maneuver. Also, call the maneuver typically determined by the climb (1/4- soon enough to allow approx, one though you were almost vertical when loop radius). Execute the turn as pre­ the rudder was applied. While we're at second to elapse before the plane is viously described and call the maneuver directly in front of you and the judges. it, a design which rolls with rudder complete at about the same point in application is also difficult to coax into a Make the pull-up deliberate and space where the start was announced. constant, watching for wind drift all the nice tight turn. No discussion of stall turns is complete Start the approach at a moderate time. If there is a crosswind you can add without an answer to "What makes the rudder on the entrance and vertical altitude, say 50 feet, and position it so model flop on its back?” Usually this that any crosswind will work for you. For section of the half loop. Do not hold the occurs when the model reaches exactly rudder in as the model starts over on its example, if the wind is at your back, fly vertical (plus a degree or so past vertical about 200 feet out on a heading parallel in some cases) and the engine is not at a Continued on page 94 with the flight line. When the stall turn is executed it should be into the wind, not downwind. This allows the model to apparently come back down the same line it climbed on. Also, the plane will almost always stall turn into the wind more easily than downwind. It is important to keep air moving over the rudder if you expect good results. We set the throttle for a very fast idle as we climb into the stall and let the plane rapidly lose momentum. As the stall approaches we simply push hard rudder momentarily, just long enough to start the turn. Immediately we reduce throttle to a low idle and ease the rudder to neutral. The plane should drop hard and tight without a lot of wiggle and waggle. If you leave the throttle at a high idle, the stall turn will widen and the nose may not drop to vertical. If you hold the rudder too long, the model may over­ shoot the vertical dive and wiggle badly. If the wind is blowing toward your face, make sure you start at least 200-300 feet out, and again, make the turn into the wind.

24 R/C MODEL BUILDER beat nitromethane. In the idle department (for those so inclined), I only got the diesel down to about 4.500 with the 10x6. I don’t know how a stock HP .40 would compare, but suspect that some of the sub-3,000 figures people believe have some wish­ ful thinking in them. One point I have kept referring tobut P.O. Box 2699 17119 S. Harvard haven’t actually tested is the capability Laguna Hřib. CA 926S3 HENRY NELSON Gardena. CA 90247 of the diesel to swing a really big prop. 729 Valemont Drive For this I'll accept the data from Pete Verona. PA 15147 Chinn that the diesel does have that ability. However, I have to put in my 2

MAY 1980 25 just a touch of crow flavor to it. Still, I PLAIN feel this is a change for the better. SOARING Anything that helps eliminate the luck TALK PART factor can’t be all bad. TWO Of course, this rule plays right into the ABOUT FA I DESIGN Northern European philosophy of FAI, By DAVE THORNBURG . . . What's it going to take to make America so as an American I should oppose it on principle. The Europeans wish to (and competitive once again in world R/C soaring competition? ultimately will, probably by ’81) reduce distance flying to the same mechanically • Last month we talked about the fact thermalling, it has to be a postal precise pattern that speed has become. that FAI soaring is moving steadily away romance! In Belgium, the Austrians, for example, from any emphasis on thermal flying; That’s why I said, last month, that made no attempt to search the course that duration is now worth only 26% of we’ve got to unhitch our egos from the for the best air; they launched and flew the score, while speed and distance are thermal event and start designing for the in the same narrow band of air they used each worth over 33%. Most of the two “ mechanical” events, distance and for speed. When they picked their air countries participating in the program speed, if we want to play the FAI game. badly, or when the gods frowned sud­ seem to favor fast, heavy airplanes that That’s why the three-views this month denly and unexpectedly, they fell far perform not because of the air, but are not of polyhedral floaters (which I short of their vaunted 10.76-lap average. despite it. The Americans’ love affair still love best) but serious go-fast air­ This multiple-attempt rule in distance with the thermal is simply not shared by planes from 1979 that will hopefully still is just one more sign that the days of the very many of those strange and unpre­ be competitive in ’81. floater are over. Relaunching gives all dictable folk who inhabit foreign Now let’s look at the distance event. the advantage to a fast plane; if you use countries. Distance is still the most luck-prone of up your entire four minutes on the first The problem is one of geography. the three events; the pilot is restricted launch, you'll be lucky to have three fly­ Only countries with warm, sunny, mild both as to time (eight minutes) and place ing minutes on your second attempt. But climates can ever really come to know (between imaginary planes A and B). But if you finish your first attempt in, say, the joys of thermal hopping; the endless the luck factor in distance has, in the 2:40, then you have plenty of time to afternoons spent playing tag with vul­ past, been largely a negative one; bad air relaunch and take another crack at it. tures, circumnavigating fat cumuli as if could hurt you far more than good air This may strike you as a minor point, as they were islands in a soft blue sea, or could help you. Most competitive, well- you read it lying there in your Strato- having mini-contests with a flying buddy flown ships could pull nine or ten laps lounger, but I’ve seen times in FAI with one-hour maxes. How many out of average air (whatever that means), contests when I’d gladly trade a month’s modelers in Northern Europe would so it didn’t take much of a boost to hit vacation for an extra thirty seconds of take a chaise lounge to the thermal the magic twelve. But really bad air working time, straight across. When the field? could push even the best pilots under working clock is running, leisure time is Look at a globe and the picture five. hard to come by in an FAI contest. becomes clear. London is further north The November 1979 CIAM meeting Distance is a pure penetration event, than Newfoundland or Vancouver, B.C. took some of the sting out of this and the physics are right out of your high Gibraltar, at the southernmost tip of situation by removingthesingle-attempt school textbook. How much work (in Spain, is barely as far south as Oklahoma rule in distance. Now you can relaunch the form of pushing air molecules out of City. And Torino, where the sunniest and re-enter the course as often as your the way) can your model perform in the contest of the whole European FAI heart desires within your eight-minute process of falling 492 feet? Answer: an circuit is held, lies at latitude 45° north, working time. No doubt this rule is a amount of work directly proportional to approximately in line with Portland direct result of the Austrians (and others) the weight of the model. (Oregon), with Minneapolis, and with having eaten dirt a few times on the Discussions of the distance event Montreal. If a European falls in love with distance course in Belgium . . . dirt with always get bogged down in the L/D formula. Theoretical L/D ratios are marvelous and awe-inspiring, and I believe every model should have one. But they don’t . . . can't. . . consider the local turbulence a model encounters in flight; the little updrafts and down- drafts, the creases and wrinkles and knots air gets itself into when it isn’t inside a two-million-dollar wind tunnel. These are the things that sap a model’s energy, that make its actual L/D vary on every flight. Of course, if the local turbulence happens to be mostly rising air, then a lighter ship has the advantage. But only an optimistic American would expect lift on the course; a sober, realistic European would expect (and get) the usual creases and wrinkles and knots. Question: Which flies further, a five- pound model with a 12:1 L/D or a ten- pound model with a 12:1 L/D? Answer: (Textbook) They both fly the same distance. Answer: (From experience) The heavy model, four times out of five. Ralf Decker of W. Germany flew this 4-channel bird at the '79 World Champs in Belgium. It * Φ * spans 110 in., has 818 sq. in. wing area. Wing loading was 11.4 ozs. minimum to 17.6 ozs. max­ imum. Ralf's plane wasn't as fast as similar ships without dive brakes built into wings. Airfoil Whenever I deliver this build-big- varied from an E-193 at the root, to an E-180 at the tip. and-heavy sermon somebody always

26 R/C MODEL BUILDER LÚFTCHEN

,\ ______T______I------J f

) = L _ i I______^

lr I —

-H h- ______- 7------

The Luftchen, by Norbert Luka of W. Germany. Has 107-in. span, 714 sq. in. wing area. Minimum wing loading was 9.3 ozs., max was 20.2. Airfoil was an E-193. Luka's poor scores on distance (the luck event) kept the German team in 3rd place. asks, “ OK, OK, but how are we gonna using the winch almost exclusively). going to be at the Finals, rooting against launch these eleven-pounders? Do you There was simply no energy in our you. Virtually all of the competitive ships really think we can get a plane this heavy launches, compared to theirs. That’s at the ’79 meet were carrying 18 to 20 up to 500 feet without a Saturn booster?" why I’ve been preaching, to anyone who ounces in speed: by '81 some of these Sure. The Europeans are already doing would listen, that we need one-piece folk will have enough practice to hit the it. There were a number of models at wings for serious attempts at the ’81 high eights occasionally in speed. Or the Belgiun contest that carried twenty Champs, one-piece wings that will take maybe less. There is no natural barrier in ounces a square foot, and some of these 60 pounds or more of pull. Don't worry speed. Remember that 6.7 seconds were hand-towed! about portability . . . if you make the through the course is only a 100 mph Here’s how the Austrians hand-tow team with a 110-inch wing, America will average speed. And there’s at least one the Dassel (650 square inches, up to 17+ get you to the World Champs! glider in the world that’s hit 243 mph. ounces per foot). They use monofila­ * * ♦ Does an airplane of this caliber have to ment fishing line of around 150 lb. test, be built in specially machined molds and they stretch the sin out of it! One So here's the challenge: You're costing thousands of dollars? I don’t helper drags plane and towline off into allowed 176 ounces of total weight. Your believe it does. Mike Reagan in L.A. is the bush, while the tow-man chitchats maximum permissible wing loading is having good luck covering foam cores with the pilot at Base A. At the launch . .. oh, well, might as well admit it . . . with sheets of fiberglass, using only a signal, the tow-man trots off in the over 27 ounces a foot. That’s right, 27. large sheet of aluminum creased across direction of Base B. The other helper The FAI surface loading max is 24.51, but the center to the shape of his leading hangs onto the plane until 40 pounds of we Yanks usually talk in terms of wing edge for a "mold.” It’s an ingeniously tension is built up on the line. That's loading, right? So figure an 11% stab. simple system, compared to milled right, 40 pounds! (Take a set of pull- That means about 90% of the weight is molds. A source of carbon fiber forspars scales and measure forty horizontal “ carried” by the wing. Divide 24.51 by and webbing is Bill Meullerat Hi-Flight, pounds . . . it’ll pull you right off your .90 and you get. .. call it 27 ounces even th·’ folk who kit the Mirage. And don’t feet! These Austrians are built like and you’ll be safely within the limits. overlook Kevlar. Oldsmobiles.) When the helper finally Now divide 27 ounces into 176 and But a clean/fast/heavy airplane isonly turns loose, the plane goes up the line you get 6.5 square feet, or 936 square half the answer to the FAI battle. Equally like a missile, releasing at around 75° inches for the maximum size of your important is the team you put together into a climbing turn that has it back wing. That’s IF you want to push the to fly it. The lone wolf is at a terrific behind Base A again almost instantly. limits, the 27 ounces a foot. If you’re not disadvantage in FAI today; there’s just The tow-man has covered less than 300 ready to live quite that dangerously, too much to do and too little time to do feet, including the line stretching. Only then divide 176 by whatever figure you it, both on the field and in the work­ in zero-velocity or actual downwind think you can design to . . . say, 22 shop. I think there’s no question that conditions did the Austrians attach the ounces per foot. This will give you an what allowed the South Africans to slip line to the ground and use a hand-held even 8 square feet, or 1152 square past the Europeans and win the team pulley. inches. trophy, in spite of the handicap of their How high were they getting? Over 500 But here’s the kicker: if you plan to airplanes, was their incredible team­ feet. Observers agreed that the Dassel, divide by 20 or less, you'd better go back work. I’ve never seen five people func­ at nearly 18 ounces a foot, was out- to AMA flying. If you’re not prepared to tion so selflessly as a single unit when the launching the much larger American fly at least 20 ounces a square foot, floaters, at 10-12 ounces a foot (we were you’re going to lose, my friend. And I’m Continued on page 98 MAY 1980 27 - R/c G l id e r P o s t a l ! By KEN CASHION . . . Many modelers are thinking twice before travelling long distances to contests nowa­ days. One way to get fliers to compete is by holding a postal contest. Here's how to run a successful one.

• The other day, while sitting in a better than just “ 1st” ? (I once got a third gasoline line, I started making oneof my place trophy for a three-plane pylon lists. I am a compulsive list maker. It race in which all three planes crashed helps me organize my time, and though within two laps of the start. It is a cute I may not do more, I end up doing most conversation piece but not much pride oř the things that I want to do instead of a is taken in owning it.) lot of the things I do not want to do. Those fliers who wanted to compete Some of the things on the list were "Turn sent their entry fees and I sent them their down hot water thermostat,” "Turn off score sheets. To make it easy, there were air conditioner vents in unused bed­ no envelopes, but the sheets were rooms,” “ Start driving 50 mph to and folded so all addressing was already from work” (instead of 65 mph), etc. It done and return postage was attached. was then that I realized that I was They just had to fold it so the right defining my 1980 lifestyle and more address and new stamp was showing. I should be added to the list. “ Keep 10 would accept reasonable facsimiles of gallons of gasoline in safe place," "Limit score sheets, but not unless the entry fee sailplane contest trips.” . . . WHAT?! had been postmarked the day before What can I be thinking?! Is the world Postal contest was an invitational contest the first day of flying. All score sheets really running down so much that I have which concentrated on gulf (of Mexico) were to be postmarked for return within to limit my modeling? coast area fliers who have flown in a week of the last flight day; ten days After I had recovered from some of contests in New Orleans. Picayi ne. after that, the scores were declared my shock, the cars behind me honked, Mobile, Pensacola, and Panama City. official. The plaques would be engraved and I moved up two places in line. So Everyone knew each other, and the and mailed. Scores were tabulated and a what am I going to do about my model­ invitation extended to their friends in letter about the interesting aspects of their respective flying groups. Some ing? How can I keep the gasoline situa­ the contest was mailed to each entrant tion from impacting my modeling? people who wouldn’t go somewhere who sent in a score sheet. All others else to fly would fly in a postal, and First, I decided that smaller airplanes were marked as DNF. beginners get to fly on their own field cost less. They also can fly in smaller Such a contest permits trying a new with their usual flying buddies. areas, and I have more small areas near task, but the C.D. shouldn't burden the me than big areas. For instance, three Most areas have different kinds of local fliers with complicated flight and blocks from my home is a school ground fields, but by using two consecutive landing schemes. The flier must declare and a football field from which the light weekends (or a month), each group of an attempt before launch for the flight poles have recently been removed. For fliers could optimize his field’s flying to be official. Usually other fliers on the H.L.G., Peanut, 1/2A R/C, electric, and conditions. Tape measures and stop­ field were the timer/witnesses, so I small high-starts with a turnaround watches do not require subjective judg­ believe everything was run on the up- pulley, it is just fine. With the wind in the ment . . . you just read it and write down and-up. The duration portion of the right direction, the field is OK for light the numbers. Of course, timers (wit­ contest was LSF applicable. On the score standard class sailplanes . . . a little tight, nesses) must sign the score sheet beside sheet there was a place to specify if the but I could handle it. The small stuff I can each score. flier wanted LSF credit and for what take on my bicycle, now that I have How did mine go? I wrote an invita­ level. I sent each who requested it, made a model carrier on the back. (NO tion and explanation to each person I certification showing the necessary control line . . . I am dizzy enough as it could think of. In the same mailing I scoring information and delegation of is.) included the usual contest annunce- authority to sign my name to the LSF That will take care of 75% of my sport ment with the rules. For our contest we flight achievement voucher. flying. The rest of my sport flying re­ flew four flights of five minutes dura­ The entry form had blanks to fill in, so quires more room for my .35 R/C power, tion (no overtime penalty; not neces­ it became a survey of equipment, capa­ scale sailplanes, and unlim ited sail­ sary). Landing bonus was one point per bility, experience, etc. of Gulf Coast planes. So I have cut quite a few miles foot, measured up to 50 feet from fliers. It is always difficult to get this off. but not any flying. But what about landing spot. Task I la with landing bonus information on the flying field. It has my contests? What about the two or was also flown. Duration scores were been suggested that there be a series of three 16-hour round trips to Houston; added and plaques given through fifth postal contests to determ ine area or the 6-hour round trip to Mobile; or place. Since there would be few cases of “ champs.” I do know that you cannot two 9-hour round trips to Pensacola; frequency conflict and everyone had determine the “ king of the mountain” and 18 hours to and from Huntsville, plenty of time (and Dave Thornburg can from one contest. Now, I know that Alabama? Now, for an idea whose time inspire me witFi diabolical plots), we had there are spearchuckers in California has come. A Postal Contest. Yes, I know an R/C Hand Launched Glider event. who can throw a Mirage into orbit and that that wonderful magazine, R/C The winner would be the one with the that the ground there is one big thermal Model Builder, sponsored the world’s most air time of nine launches. No spot generator, but did you know that a 2- biggest postal Peanut contest, and landings. Plaques were awarded through meter Lite Kite was thrown by Melvin the AMA has a Jr. Postal, but this postal third place. Plaques were used because Duval of and in Pensacola. Florida, to contest is for sailplanes. (No, you don’t you can mail them in padded envelopes. flights of 2:05,1:30, 0:54, and 0:41? That mail in your sailplanes.) I have recently One of the nice things about a postal may not be too good in some areas, but conducted a sailplane postal contest. contest is that you know how much that is fine flying for around here. There are two basic disadvantages to a money you have for awards before the Disregarding the two longest flights, the postal contest. One is that it seems as awards are purchased, and you can have average of all flights (H.L.) was 24 cold and impersonal as a letter addressed the winners’ names, place, and number seconds. Don’t laugh. This was a first­ to "occupant," and second, the "heat” of entrants engraved on the awards. time effort for all of these fliers. The of competition is missing. The Picayune Doesn't “ 1st of 21 entrants” sound Continued on page 95 28 R/C MODEL BUILDER Rc SOARING by Dr. LARRY FOGEL • I’m often asked to recommend a handling quality. If, however, you’re model. It’s really a difficult question. trying to make a grape look like a plum, First, who’s the model for? Then, there’s you indeed have a challenge. the ease of construction, adequacy of Handling quality has long been of the kit (if one is available for that design), interest in the design of full-scale air­ the beauty of the finished product, its craft. First, planes were described as flight performance, and of course, the being simply "good," "bad," or "im ­ handling quality. Note that handling possible." In 1957, G.E. Cooper pro­ quality is not the same as flight per­ posed a finer scale ranging from 1 to 10, formance. You might have a very effi­ as follows: 1 is excellent; 2 is good, cient sailplane that’s difficult to control, pleasant to fly; 3 is satisfactory, but with or one that responds well to your some mildly unpleasant characteristics; commands but simply can’t "hack it." 4 is acceptable, but with unpleasant Flight performance can be described characteristics; 5 is unacceptable for in terms of efficiency (lift-to-drag ratio), normal operation; 6 is acceptable for speed range, maximum roll rate, the emergency conditions only; 7 is un­ stability margin, and other characteris­ acceptable even for emergency condi­ tics. The particular combination you tions; 8 is unacceptable, dangerous; 9 is want depends on the task to be per­ unacceptable, uncontrollable; 10 is formed. For aerobatic performance you catastrophic. Have you ever flown an want to sacrifice stability for maneuver­ 8, 9. or 10? ability. For thermalling you need that But, for our purposes, it might be stability, especially in the face of turbu­ more appropriate to examine handling lence. but too much stability may pre­ quality in terms of its components. First, vent you from staying in that tiny low- you want the flight control to be predic­ altitude thermal. table; that is, you want the same re­ In contrast to flight performance, sponse, given the same command to the handling quality concerns the ease with same aircraft in the same environment. which you can put the plane through If you have ever experienced a severe its paces. If the flight performance double-neutral, you knowexactly what I characteristics closely match the task to mean. Excessive friction in the linkage be performed, it’s easy to achieve good causes the neutral position to depend upon the last direction of control move­ ment. The result is unpredictable flight performance . . . a bad scene if ever there was one. You’d also like the response to be Similar to last month's stand-'em-up-on-a- immediate, if not sooner. The quicker wingtip photo, is this one of Bill Winans and the reaction, the better your ability to his 200-inch Carrera SB-10, imported from monitor the plane’s acceptance of your West Germany. commands. Naturally, big heavy birds are likely to respond slower, but let’s not Where does all this lead? To the have more lag than necessary. You can’t design of aircraft with handling quality imagine how excessive lag can com­ in mind, having adequate control sur­ pound the problem of a double neutral. faces in positions least affected by wing Cross-coupling also has an impact on wash and the turbulence caused by handling quality. It would be nice if other parts of the plane, making the Rick Schrameck's "Mach Schnell" FAI ther­ pitch and yaw remained independent of ailerons a little thicker than the wing at mal ship makes a fast pass at Torrey Pines. bank angle, but there's some cross­ the hinge line so as to ensure sensitive Has also been used in slope pylon races, coupling in all aircraft. The trick is to control near neutral, providing non­ where it really lives up to its name. minimize this complication. linear controls to compensate for non­ linear aircraft response, and perhaps even to electronic compensation for the cross-coupling. Meanwhile, there’s a growing interest in the design of F3B (FAI) competition sailplanes. Ken Raymond of the Torrey Pines Gulls has come up with a 100-inch span craft. The wing has ailerons rather than dihedral. The 10-inch constant chord goes out 20 inches, then the wings taper to a seven-inch chord at the tip. The 877 square inches of wing area carry 52 ounces with an optional pound of ballast. The airfoil is only 8% thick with Phillips entry and 2% camber. The high point is at 35% of the chord. The small Rick's "Mach Schnell" mixes it up with an Antares hang glider, one of the new- generation rudder is coupled to the ailerons for bowsprit Rogallos. smooth turning. Ken uses a nylon clevis

MAY 1980 29 an Eppler 205 section. The root chord is 11 inches without taper out to the polyhedral joint. It then tapers to an eight-inch chord at the tip. This new wing has 1050 square inches of lifting surface. The stabilizer has 140 square inches; the rudder six square inches. Rick claims the performance is now sufficiently good for a pilot kit; that is, for 20 similar aircraft to be built and flown to work out the bugs and finalize the design. It’s been fun to watch this plane mature from a gleam in his eye. Judge John Menard of Bonita, Cali­ fornia, gets his kicks out of designing and building very light thermal machines. His latest creation is of two- meter span. The wing fits in a forward notch and is held secure with a dowel Ken Raymond is also into the design of F3B competition sailplanes, shown here with his orig­ inal design 100-incher. Uses coupled ailerons and rudder, Futaba radio. that locks the trailing edge in place. The plane weighs about 20 ounces all-up and to lock the two halves of the wing from less than nine ounces to about 16 ready to fly. The airfoil has Phillips entry, together in the fuselage. This provides ounces per square foot wing loading. allowing it to penetrate far better than automatic quick disconnect . . . a safety The airfoil is an Eppler 193 with the might be expected for such a light craft. I measure should there be a hard landing. ailerons electronically coupled to the asked John, "Why not build larger The fuselage is also of clever design. rudder. This fuselage was built-up to birds?” He answered that there are Ken uses two 3/16-inch square spruce facilitate changing the design, but the enough problems in making small birds spars which are held together by 1/32- final fuselage will be epoxyglass fly really well. In fact, there might even inch plywood sides to form the vertical strengthened with carbon fiber material. be more problems with small-span box frame. The elevator control rod and models. antenna are carried within this box. The In the latest configuration, Rick traded Hans Weiss, the proprietor of Wilshire soft balsa, glued to the sides and top, is the ailerons for some polyhedral (to Model Center, 3006 Wilshire Boulevard, sanded to make an oval cross-section. eliminate aileron drag). The wing is now Santa Monica, California, is an enthu- There is a notch in one side of the fuselage so that the rudder control cable goes straight from the servo to the control horn without a bend. Two- ounce-per-square-foot fiberglass cloth covers the fuselage to provide strength. K&B epoxy paint completes this beauti­ ful bird. It flies fast and is very maneuver- able .. . almost aerobatic . . . but the primary intent is thermal flight, speed, and distance. We look forward to seeing this plane in F3B competition. Isn’t it remarkable how the new flat land com­ petition planes look more and more like slope ships . .. even aerobatic slope ships! Rick Schrameck of Carlsbad, Cali­ fornia, continues his development of the "Mach Schnell” for this same event. This 100-inch span aileron controlled Ken's model shows its ultra-clean lines in this photo. Compare area and wing loading (in text) glider operates at 60 to 90ounces; that is. with that of the FA I ships shown on pages 26 and 27 of this issue.

Radio components in Raymond's model are arranged in line to Wing and stab planform of Ken's F3B model show up well in this keep the fuselage as narrow as possible. photo. Constant-chord part of wing appears to be fully sheeted.

30 R/C MODEL BUILDER Neat method of wing attachment on Menard's glider. Ply tongues Judge John Menard displays his latest project, a 2- meter original at t.e. fit inside fuselage, are held in place with a dowel. Leading that weighs a mere 20 ozs. ready to fly. edge uses familiar dowel-through-a-bulkhead. siastic glider pilot who flies off the coast for standard class ships, and two to three of Malibu. John Hill of Los Angeles flies pounds are needed for unlimited sail­ his KA-6E at the same site. This 12- planes. "And in flying distance events, pound, 12-foot span fiberglass flier you’ll also need weight, perhaps half as cruises smoothly, even through con­ much as you need in speed events. siderable turbulence. The weight en­ Practice will tell you how much to use, sures speed and efficiency. Bill Winans and you should fly a few test flights, of Pacific Palisades flies his Carrera varying your weight, before you come SB-10 there, too. You really appreciate out for the meet.” its size when he holds the 16-foot wing The Pacific Breeze, newsletter of the vertically. Pacific R/C Soaring Association, ad­ Recently, I had a chance to chat with dresses those who are "tired of having Phil Kraft, who is no longer connected your Hot Stuff bottle bouncing around with the organization he created. We inside your flight box. Take the plastic went for another ride in his two-place cap off a spray enamel can. glue or screw Fournier motorglider. The task was to it upside down to the top of your flight calibrate the stall performance of his box, and insert the Hot Stuff bottle in the full-scale Super Fli in upright and in­ center portion . . . it’s a perfect fit.” verted flight. I was happy to be in the Chuck Welman, editor of this journal, Fournier! goes on to point out the usefulness of With all that wing and such a light loading. After landing, we talked of many Judge Menard's model goes straight up. empty 35mm film containers for holding things. Finally, I asked him to passon any small parts and lead shot to hold down advice on how to become especially Once the basic stick movements are items on your building board. He also skillful in R/C soaring. He suggested that clearly in mind, you can "fine tune” the points to the use of a carpenter’s wood you should spend considerable time maneuver as you watch the airplane rasp for rough shaping prior to sanding, with your transmitter in hand, even respond to your commands. This tech­ and the value of a small piece of solder while away from your soaring site. nique may be less valuable for thermal- embedded in the wing tip to balance the "Visualize your plane as it moves ling than aerobatics, but it should be wings before completing the covering. through various maneuvers in accor­ particularly worthwhile for improving If you enjoy reading about our hobby, dance with your movement of the your launching and landing. The better make note of a new book entitled controls.” At first, I thought he was your imagination, the more you’ll learn. Getting Into Radio Control Sports by joking, but he assured me that he was Try it, you'll like it. Jerry Murray (C.P. Putnam’s and Son, dead serious. He emphasized the impor­ Some hints: Stan Watson, editor of New York, 1979). This book is especially tance of planning and practicing man­ Soaring Flight newsletter, suggests that for the novice. It portrays various kinds euvers long before they actually occur in about a pound of ballast is required to fly of radio control, ranging from cars, flight. This way you clearly see the speed events with a two-meter model, boats, planes, and, of course, references necessary ingredients of each maneuver. while one or two pounds are required our particular joy . . . radio control sailplanes. This book includes a picture of Mark Smith, who designed the Jona­ than Livingston Seagull model (for the movie of the same name), the Wind­ ward, Windfree, Wanderer, and other notable planes. I’m proud to say that the jacket of the book shows a colored photograph of my Legionair. Again, I want to call your attention to Model Aircraft Aerodynamics by Martin Simons (Model and Allied Publications, Argus Books, Ltd., 14 St. James Road, Watford, Hertz, England, 1978), which offers a very complete and sophisti­ cated presentation for those who are Continued on page 89 MAY 1980 31 By TOM W ILLIA M S . . . The latest effort by one of the top R/C sailplane designers in the U.S., the Golden Eagle is a real floater, yet has as much speed and penetration capability as most heavyweight FAI models.

• The state of the art in high-perfor­ you’ll get more flight time per launch. to penetrate upwind hunting for or mance R/C sailplanes is advancing more However, the forward velocity is also returning from thermals. The only draw­ rapidly than any other phase of R/C proportional to weight (size being back would be that the landing velocity modeling. It is indeed the most exciting fixea), and the lower the forward speed, will be higher, which will hurt us older part of my entire engineering career to the lower the Reynolds number (Rn). men with slower reflexes. But wait! If we be a professional sailplane designer at You need not understand this term; just fully turbulate the airfoil, as on the such a time in model aviation history. I accept what its effects are. The airfoil Golden Eagle, we can reduce the stall am proud to present to you, here in the efficiency in the lower regions of Rn speed without any noticeable effect on pages of this outstanding modeling (below 1,000,000) goes down as Rn goes high-speed performance. magazine, my latest design. I hope it will down. Gadzooks! A dilemma! What is PERFORMANCE contribute to the advancement of the needed is an airfoil that will perform Your results are going to depend a lot sport and to your trophy case. well at very low forward velocities. To on how you build and how you fly, but if The Golden Eagle is by no means a meet this need, I designed the FB1151. It you can't wait to finish yours, we can tell trainer. On the contrary, it is a high- first appeared on the Windrifter, then you that the prototypes performed in performance contest type sailplane the Sailaire (by the way, the Paragon has every respect beyond the most optimis­ designed to make good pilots do even an almost identical airfoil). Unfortu­ tic dreams of this old designer. better. nately, this airfoil flies so slowly at 6-1/2 The Golden Eagle thermals as well as a DESIGN PHILOSOPHY oz./sq. ft. that it becomes ineffectual on Windrifter, has an impressive launch (sometimes called BULL) windy days. Yet this same slow speed angle (almost straight up), yet has It has occurred to the designer that makes it outstanding in the landing demonstrated extremely fast times in you may build a better sailplane or at circle and as a trainer. F3B speed runs . . . less than 11 seconds least derive more enjoyment from it if NEW DESIGN GOAL at 42 oz. flying weight. At this writing, no you know some of the design philoso­ What if we could design an airfoil that all-out tests have been made because no phy behind its creation. would fly faster at light wing loadings? wings with carbon fiber spars are yet Without burdening you with engi­ The sink velocity is proportional to neering formulas, suffice it to say that weight and has essentially nothing to do the lighter (lower wing loading) a sail­ with the airfoil. Therefore, we may still plane is, the faster it will go up in lift and, have the unexcelled thermal perfor­ conversely, the slower it will come down mance and super-high launches (if the in dead or down air. In other words, winch goes fast enough), and yet be able

Fiberglass tube is fastened into the wing root Wing structure follows standard practice; only unusual feature is that bottom of l.e. is sh with epoxy, and lots of it. Note 1/4-sq. plug top is not. This particular wing uses experimental carbon spars, recommended for FA I. at end of tube.

32 R/C MODEL BUILDER Stab structure is about as simple and light as you can get. The forward stab tubes are glued in place first, then the stabs are aligned on the wires and the rear tubes glued in. Completed fin and rudder framework. Big rud­ flying. The L/D has not yet been mea­ der requires only a few degrees of travel for sured, but it is believed, from observa­ quick turns. tions, that it is at least as good as the Sailaire (21:1). follows. Where more than one cement This sailplane was not designed for FAI type is acceptable, the preferred ad­ competition, but as a Standard Class hesive is listed first. sailplane that would penetrate the winds A) Aliphatic Resin (Titebond, Wilhold which are the norm east of the Rocky Aliphatic Resin, etc.). Mountains. B) Butyrate Cement (Ambroid, Aero The Golden Eagle will be competitive Gloss 40% Stronger, etc.). on the typical Southern California calm C) Cyanoacrylate (Hot Stuff. Jet.etc.). day, but, when the wind blows, it will be Use micro balloons or baking soda as in a class all by itself. fillers. If structures are fabricated with DECISIONS type C, each butt joint must have a fillet SPARS: As airfoils are made thinner, of type A added before covering. the stresses in the wing spar go up by the D) Contact Cement: volatile solvent 4th power. The spars on the plans are latex, the type used to bond plastic sufficient for all lightweight (no ballast) counter tops. Has strong odor (toluene). maneuvers and all but the most taxing Water base contact cement is not to be ballasted maneuvers. If you intend to used on the Golden Eagle. use this sailplane for F3B type speed runs E) Epoxy: Any brand of 5-minute or with heavy ballast, put in carbon fiber 15-minute epoxy is acceptable. spars (about $20, available from Hi-Flight WING Model Products, 43225 Whittier Ave., The relative performance of your Hemet, CA 92343). Top view of rear end of fiberglass fuselage shows how bellcrank notch is offset to the sailplane is directly proportional to how WEIGHT: A sailplane built lightcanfly right to clear rudder pushrod on the left. accurately you built your wing. The light or, by adding ballast, heavy, but airfoil shape of the ribs you cut may be one built heavy can only fly heavy. The within .005 inch of design shape, yet the 1/32 ply sheeting used on the fin is a ANTI-VORTEX TIPS: Make them! best of us do well to build a wing within heavy building material but needed for They're not hard to carve, they’re easy to 1/16 inch of being true and the best we rigidity. You can cut out some of it, as cover, and they are aerodynamically can hope for is .015 inches. After you well as the 1/4 x 9/32 center separator effective. Follow the instructions one finish all four panels, lay a straightedge and save one ounce in the process. step at a time. across all the ribs on each panel and Don't complain if your wood is light CONSTRUCTION you’ll see what I mean. To minimize this (soft); complain if it's rock-hard (heavy). Use of the proper adhesives is just as problem, make sure you have a building You’re not building an outhouse! important as using any other proper board that is flat and firm, yet soft WING ROD: If you’re going all-out building material. I feel that this is so important that I have specified the enough to take pins without pushing the for F3B speed with lots of lead, a second heads through your thumb. A board wing rod could be added just ahead of proper adhesive for each joint in the the spar. step-by-step building procedure which Continued on page 68

Rear view of the wing tip, showing what the Hoerner tip should look Fin makes extensive use of plywood, heavy but necessary for like when finished. Not that hard to carve. strength. Cutouts help get rid of some of the excess weight.

MAY 1980 33

FULL SIZE PLANS AVAILABLE - SEE PAGE 108 MAY 1980 35 Photo No. 2. Jack Alten and Playboy J r., another 1/2A Texaco ship. Photo No. 1. A rare Ehling "Triangle" build bY At 54 inches, it's bigger than the majority of 1/2A's. new 1/2A R/C Texaco event. An ultra-stable fl»er#

mt/ěšPAmPHOTOS BY AUTHOR

By JOHN POND

• This columnist knows that a lot of Although rather large for the 1/2A Texaco event. Jack reports it is probably modelers don’t remember the old “ Gas Lines” column started by Model Air­ the best sport flier he has ever had. Photo No. 3. A.P. Wilson of Tokyo, Japan, plane News in 1935, but any Old Timer Blessed w ith a long m otor run, the built this nifty Junior Clipper from memory worth his salt truly treasures these model slowly gains altitude to the point as no plans were available to him. Has single­ columns with their photos and accom­ where a very satisfactory flight is made. channel R/C. Jack Alten, who resides at 3027 Prune- panying writeups. Missile Mist, Jack has added gasoline This month, for a change of pace, this ridge Avenue, Santa Clara, CA, is very and a few other ingredients to come up writer would like to embrace the format enthusiastic over this new event, going with some spectacular results. His latest, of that early 1935-1942 column that was out to fly every lunch time in the field so popular with the modelers. As a adjoining the Hewlett-Packard Cor­ which the columnist uses, employs Davis matter of fact, many of the modelers can poration. By using slow-turning large diesel fuel, gasoline, and Missile Mist to still be reached at the addresses given in propellers and a Cox QZ muffler, no give a startling eight-minute motor run! those 40-year-old magazines. noise is readily heard at a hundred feet. Of course, it must be recognized that This month’s column will also feature Many people have approached Jack to large, slow-turning props are in order. the spectacular rise of a new simple ask how his glider stays up so long, as At present, both the Triangle and Play­ event known as “ 1/2A Texaco” in the they have failed to hear any motor boy are equipped with 8x5 Y&O pro­ Old Timer R/C circles. Photo No. 1 running! This is truly the way to go, as pellers turning about 5,000 rpm. Jack has shows a Frank Ehling design, the "Tri­ most people will put up with a hedge actually bench run some Cox reed valve angle,” as built by John Pond of 4269 trimmer or a loud lawn mower, but just engines with nine or ten-inch propellers Sayoko Circle, San Jose, CA 95136. let someone try to have fun with a model that have given as much as twelve- Pond states this model, originally airplane! Under this method of flying, minute motor runs! designed and flown with the Ohlsson no one complains! This, then, gives forth to a tradeoff. If .23 in 1938-39, flies very well with one of Jack also has been extremely active in the propeller is turning too slowly, the the Cox .049 reed valve engines, in this trying out various fuels to see what can model is unable to take off, regardless of case a Black Widow. Flis best flight to be obtained in long motor runs. Nor­ length of runway. On the other hand, date has been fifteen minutes, in January mally, with Cox standard fuel, most fast-turning motors make for such a fast of this year. Black Widow motors will run three climb that the model is practically out of Photo No. 2 shows Jack Alten with a minutes, using a 6x3 propeller. Starting sight in three minutes. This is one of the Playboy Junior of 54-inch wingspan. with a basic glow fuel, such as Fox problems that faces Ted Kafer with his half-size Ehling Contest Model. Weigh­ ing only 13 ounces, this model takes off very snappily and in a short time is almost out of sight. This has led SAM 21 to hold a meeting devoted primarily to the promulgation of rules where everyone would be competitive. The main points of con­ sideration were weight rules and fuel types. The first, a weight rule, was adopted so the average modeler would not have to purchase any of the special lightweight airborne R/C packages. In short, any standard R/C set can be used. Photo No. 4. Lynette and Judith Buckmaster d i,i.k , , . . , Because of Jack’s amazing research Mervin Buckmaster. show off the wing of th e irn J r , ° f A ,rb o rn e model "»flazine editor into fuels leading to extremely long ieir uad s latest project, a Shereshaw XP-3. motor runs, the club decided to limit all 36 R/C MODEL BUILDER Photo No. 5. The campaign hat is Ken Sykora's trademark on the Photo No. 6. Ted Kafer, Bob Stiff, and Ross Thomas just before elec­ flying field. Model is a Red Ripper with O&R ,60.Hatrak photo. tric flyoff at Pond Commemorative . All used Playboys. exotic fuels and those altered to pro­ size Luxor. Hartman later put these specifications, the .48 has a bore of 7/8 duce economy. After considerable together. in. and stroke of 13/16 in., giving a cubic discussion about the exact wording, the Feiler manufactured 36 of the .48 size inch displacement of .48. word for fuels was "unaltered.” Luxor engines, of which 33 were sold Continuing with the specifications of In the future, unless it is found that the through the Bridgeport Model Shop the Luxor motor, the rear crankcase rules have again been found to be during the summer of 1939. With sales at covers were turned from 24ST alu­ deficient, these are the rules SAM 21 will a very low rate, it was no surprise when minum. Installation and removal were use at all its contests: manufacture of these engines was dis­ facilitated by two spanner wrench holes 1) All models must be powered with continued. drilled in the cover. A steel liner of heat Cox reed valve engines (Babe Bee, The Luxor engines feature a cast treated 4140 steel was used for both Golden Bee, Black Widow, QRC, etc.). aluminum cylinder head and crankcase, engine designs. Pistons were cast from No modifications to engines are per­ utilizing two machine bolts for attach­ cast iron, machined and ground to a lap mitted. ment. For those who want the exact fit with the cylinder liner. No rings were 2) Fuel allotment consists of filling the employed. The 4140 steel provided the tank. strength for the crankshaft counter­ 3) Any unaltered commercially avail­ balance. The wrist pin was also made able fuel may be used. from drill rod. As with most motors of 4) Any Old Timer design conforming the day, the crankshaft bearing was a to the December 31, 1942 cutoff date bronze bushing. may be used. The engine came mounted on a wood 5) There shall be no size limitations. skid quite reminiscent of the early 6) Allmodelsshallweigh8ouncesper Brown Jr. motor packaging. A Cham­ square foot of wing area. pion spark plug and Smith "Firecracker” 7) Flights under four minutes shall be spark coil formed the basic ignition considered attempts unless declared an components. The timer featured con­ official flight by the contestant. struction of 1/16-inch brass stock and 8) Three attempts will be allowed to tubing with an adjustable stationary obtain two official flights. The longest point. single flight wins. Any flight over four To round out the assembly (and again, minutes shall be an official flight. make it look like a Brown Junior), a tin­ MOTOR OF THE MONTH plate gas tank of 2 oz. capacity was This month’s motor is truly a rare one; provided on the wooden skid. The tank one, this columnist will bet, that 50% of was neatly fitted with a Gits filler cap the engine collectors are unaware of. over a 5/16-inch fill tube. The writer is indebted to Karl Carlson for One interesting feature of this engine the use of his rare motor (complete with Photo No. 7. Art Watkins did či very nice job was the provision of knurled faces on motor mounted on wood skidssimilarto on this Michael Roll Berryloid Winner. both the propeller drive and prop a Brown Jr.) and to Dick Dwyer who supplied the information sheet written by Dwight Hartman. The Luxor engines bear a very marked resemblance to the popular Brown junior motor; however, the engine we are featuring is a .48 cu. in. displace­ ment. Actually, there were two sizes of Luxor motors built, the smaller being .30 cu. in. Designed and built by Stephen R. Feiler of 451 Lake Avenue, Bridgeport, CT 06605 (present address), only one of the smaller engines was actually com­ Photo No. 8 W.W. Wilson sent this photo of his Flying Quaker, complete with GHQ engine, pleted by Feiler. Later on, Dwight Hart­ built in I937. Heavy aluminum prop acted as a flywheel, necessary for the engine to run at all. man acquired parts for 14 more of the .30 MAY 1980 37 \ ·> 1 * Photo No. 9. Frank Tlush's original 1936 Texaco winner is still in remarkably good shape and still sports a Tlush Super Ace under that stream­ lined cowl. An advanced design for its day. washer to insure a good grip on the design in this special event, was a great receiving the SCIF newsletter can be­ propeller. Only the prop drive was success with over a dozen models show­ come a subscriber by writing to Ken splined to the crankshaft, and the rear ing up. This was a great promotion stunt Sýkora, 6716 Noble Avenue, Van Nuys, face was machined for the timer cam to encourage Old Timer activity. As CA 91405. Cost is $3.50 per year. flat. Merv sez, "No question about it, the Picture No. 6 was taken at the Cal Poly No performance figures are available boys over here are gradually spreading Flying Field during the 1979 Pond Com­ on this motor; however, the motor the good word and I reckon there will be memorative. These three finalists, Ted appears to be well made. As pointed out twice as many Old Timer models at the Kafer, Bob Sliff, and Ross Thomas, all had before, the look-alike motor offered end of this year.” Playboy Senior models. It is to be noted nothing new except for displacement We are indebted to Carl Hatrak for the that Sliff has the cabin version. This size, so was known only locally, never next photo, No. 5, of Ken Sýkora, the head-to-head competition is just an­ gaining national recognition. dynamic newsletter editor of the SCIFS other form of Old Timer enjoyment. All MORE PICTURES newsletter. The Flightplug. Ken is shown models were launched at the same time. Picture No. 3 shows a Junior Clipper as here with a rather rare airplane, the Red The last man down wins (in this case Ross originally marketed by the Comet Ripper (featured recently in RCMBI. Not Thomas). Could anything be simpler? Model Airplane Co. This model was too many of these are seen on the field. All three are very active in Old Timer built from memory and appears to be As of this writing, we do not have any flying. Ted Kafer, 1979 SAM 21 Presi­ quite accurate. A.P. Wilson, residing in reports of the model’s flying capability. dent, has a regular stable of models Toyko, is to be commended upon his As a sidelight, those interested in besides his Playboy. These include the ingenuity. Wilson states the model flies nicely with a Cox .020 engine and Ace Pulse Commander single-channel R/C. Cov­ ered with transparent Solarfilm, this model has attracted considerable atten­ tion from the Japanese R/C group in Tamagawa. Wilson wants to say hello to Larry Boyer and the rest of the San Diego boys he used to fly with at Kearney Mesa flying site (before the houses gobbled it up). Picture No. 4 shows the wing con­ struction of a Shereshaw XP-3 (an R/C Model Builder plan) as built by Mervin Buckmaster, Editor and Publisher of the Australian model magazine, Airborne. Mervin, who can be reached at 11 Cornwall Close, Gladstone Park, 3043, Victoria, Australia, has been extremely active in Old Timers. He is presently flying a Comet Sailplane, designed by Carl Goldberg. He states this model flies superbly. In news from Australia, Buckmaster notes there was a special Old Timer event at the recent Australian Nationals for the Walden Skyrocket. This design, an almost dead copy of the Thermal Thumber and used as the only model 38 Photo No. 10. Gordon Codding’s highly modified Pacific Ace, which Photo No. 11. Phil Bernhardt's Ehling Contest Gas Model has a real he calls "Mr. McCaw". Shown here before painting. snarl to go with the roar of its Anderson Spitfire.

Flamingo, PB-2, Lanzo Stick, several .020 models, and now a new 1/2A .049 Texaco model. A real active admini­ strator. Bob Stiff was the Editor of The Arcing Point, the official organ of SAM 49, the Southern California club for O.T. R/C. Sliff also runs a business known as Hobby Horn, which specializes in Old Timer supplies. He also helps Jim Adams get out the SAM publication SAM Speaks. Between these jobs, he does military duty with the National Guard. Kind of a busy guy! Ross Thomas, a relative newcomer to the Old Timer game, has made spec­ tacular advances. In less than two years Photo No. 12. Texaco activity at the SAM 49'ers Texaco meet in December of last year. Kraft Systems' Jack Albrecht (left) was the winner this time. he has emerged as one of the competi­ tors to be reckoned with. He has recent­ too many fellows know it, but the ly recovered from a complete loss of all Loutrel engine, which was the fore­ j . models and equipment in a destructive runner of the GHQ. was designed to run fire. Once a modeler, always a modeler! clockwise. When the engine was taken OBIT NOTICE over and renamed the GHQ. no one While sitting in the booth for John bothered to explain the engine ran this Pond Old Time Plan Service at the 79 way; hence, the many stories of how IMS Show, I was approached by Dan poorly the engine ran (counterclock­ Davis who reported that Steve Kowalik wise!). died several months ago. JUNIOR BIRDMEN DAZE Old Timers will recall that Steve had Just received a letter from Sears his moment of glory in Model Airplane McCorrison of 29 Wheeler Circle. Apt. News when he won the Consistency 189, Stoughton, MA 02072, who sent us a event with his Miss Delaware design. whopping bunch of Xerox copies of the Impressed by his win, the Ideal Model old Junior Birdmen days. Airplane Co. asked Steve for his design, Among the literature (which was hoping to kit it for popular comsump- primarily devoted to three-views, called tion. However, as reported earlier, the Ship Shape No., Model Builder's Scrap Ideal Co. found the market had changed Photo No. 13. At Heilman, prolific in both Book, etc.) was the announcement that somewhat, as the trend was towards F/F and R/C Old Timer events, working on the big New England Championship smaller models. Kowalik obligingly the innards of his Eastern States Gas Champ. Model Plane Tournament was to be staged at Franklin Field, Blue Hill and scaled the model down to five feet plus. Unbeknownst to Cliff, the SAM 32 The new model was called the Air Chief, Talbot Avenues, Dorchester, beginning boys (Perssons, Watkins, et al) decided at 9:30 on June 28, 1937. Glider, hand- a kit that sold well for several years. to build a series of these models to In later years, Steve became heavily launched stick rubber and R.O.G. cabin surprise Cliff and at the same time put a rubber make up the three events. High involved in Shriner work and did no little more fun into the competition. model work to speak of; hence, his scorer will win the Silver Wing trophy Unfortunately, Art was the only one to and an all expense paid trip to Atlanta. passing did not impress the bulk of show at the SCIF Year Ender meet at Taft, modeldom. We’re going to miss that Georgia, to compete in the National and even more sadder was the fact that Title and $400 in prize money. This plus gabby soul! the model was not trimmed out. The Picture No. 7 shows Art Watkins, of all sorts of entertainment, sightseeing boys have promised that 1980 will be the tours, Army demonstrations, etc., 325-11 Sylvan Avenue, Mt. View. CA year to oust Silva and his Roll model! 94041, with a beautifully built Michael formed part of the weeklong trip. Were Roll 1937 Berryloid Winner. This elegant Photo No. 8 comes from W.W. Wilson, those ever the days for rubber powered twelve-foot model is the first that we 1432 Basilon Lane, Nassau Bay, Houston, flying!! know of to be constructed since Cliff TX 77058, showing his original Flying Sears remembered this meet quite Silva’s, successfully built and first flown Quaker back in 1937. To be noted is the vividly. Doesn’t remember who won. several years ago and still going strong. GHQ engine with a left-hand prop. Not but does recall that two modelers

MAY 1980 39 showed up at the edge of the field with a gas model. The Junior Birdmen Official who was directing the contest immedi­ ately got on the public address system and announced that anyone who went near the gas model would be disquali­ fied immediately. This action was taken because Lawrence Shaw, the National Director of the Junior Birdmen move­ ment, became convinced that gas models were dangerous and did every­ thing in his power to discourage their development. No question about it, this attitude led to the demise of the Junior Birdmen shortly thereafter. By contast, the Scripps-Howard contests openly Photo No. 14. A mighty rare photo is this one by Bruce Lester, showing Maxwell Bassett's embraced gas models and proved to be original Miss Philly VI taking off on its Nats-winning 70:02 flight at Wayne County Airport outstandingly successful. in 1937. These old photos are really neat! Any more out there? Photo No. 9 was submitted by Mike Granieri, 3 Dryden Road, Box 78, Pot­ successful in Old Timer radio control contests will feature the following tersville, N) 07979, showing the original events. Mike can be justly proud of the events: Pylon Class C, Cabin Class C, 1936 Texaco Winner as built by Francis number of wins and places taken by this Pylon Class AB, Cabin Class AB, .020 Tlush. This photo was sent by Mike to design during the 1979 season. Inciden­ Replica Pylon, .020 Replica Cabin, Com­ show what the original looks like. tally, plans to the MG are available only bined Rubber, and 1/2A Texaco. Mike does apologize for the right- from Mike. For further information and site loca­ hand prop on it, as Tlush Super Ace CONTEST NOTICE tion, contact Robert Wubben, 4222 W. engines were made to run clockwise. Waltann, Phoenix, AZ 85023. The model is in excellent shape and has We published what we thought was won several awards at recent trade the complete Old Timer schedule for Photo No. 10 shows a model which shows. Of particular note is that Frank the West Coast, but it was no great Gordon Codding calls "Mr. McCaw” Tlush set up all his ships for clockwise surprise to hear from Robert Wubben of (macaw, one of the parrot species), a rotation of the motor. SAM 31. He states that "Cactus” Con­ highly modified 66-inch Pacific Ace gas Mike Granieri is well known for his tests will be held on April 26-27 and job. Fie has taken off the cabin, installed "M G ” design which has been highly May 3-4. These two-day free flight Continued on page 102

OLD TIMER Model of the Month Designed by: Larry Eisinger Drawn by: AI Patterson Text by: Phil Bernhardt

• Larry Eisinger’s "Skyrocket," from the January 1940 issue of Flying Aces, is another of those oldies that looks like a winner, yet is very seldom (if ever) seen on the O.T. contest circuit nowadays. features an RAF 32 airfoil, chosen be­ glued to a piece of soft 1/4 sq., then the In fact, after eight years or so of active cause of its good flight performance and top, bottom, and side longerons (1/8x O.T. flying, first with F/F and then R/C. also because it is thick enough to accom­ 1/4) were to be added, and finally the I’ve never once come across one of modate a nice, deep spar. And not just stringers. Just how straight a piece of soft these ships, not even in a photo. . .a real one spar, either, but three of ’em, 1/4 sq. is going to hold everything while puzzler, as the Skyrocket does look like grouped closely together and located you glue on the sticks, is hard to say. A It could be made to fly with the best of more in the center of the wing chord more accurate and easier way to do it the O.T.’s now being flown in compe­ than towards the l.e., as is usually seen. would be to make a crutch, glue the tition. The fuselage has an elliptical cross- bulkheads to it, then add the stringers. A Eisinger's Skyrocket was powered section with 12 half-rounded stringers crutch certainly is not going to bend and with a Brown Jr., which is actually a lot of around its perimeter. This type of struc­ twist like a single stick would. power for a model this size (62-in. span, ture is usually a bit of a pain, but is made For Old Timer events, the Skyrocket 500 sq. in.), so the wing was designed somewhat easier in this case by the fact has to weigh at least 28 oz. to meet the with plenty of dihedral and the tail that everything is a straight line aft of the wing loading requirement in both F/F moment was made extra long to keep wing t.e., making it easy to get the and R/C. Also, for R/C, a .22 is the the power pattern under control. (Even stringers lined up properly. Also, note biggest engine allowed. Either way you the stab has some dihedral, a trick that the bulkheads have a 1/4-in. square make it, the balance point specified in intended "to make the model more hole in the center. The construction the original text is at 38%, or 3-1/2 inches stable.” Vou figure it out!) The wing sequence called for the bulkheads to be aft of the wing l.e. · 40 R/C MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 108 MAY 1980 41 Bill Stroman was 1st in F/F Scale at the 1980 IMS Trade Show with Cockpit and gun detailing on Stroman's C-1 is typical of all of his his Lohner C-1, powered by D.C. Dart .035 diesel. scale models. And he fears not to fly such gems. for use in 1/2A Pylon, since it features interchangeable crystals. For details on this gem, send a legal size SASE to Novak Electronics, 2709-C Orange Ave., Santa Ana, CA 92707. *· The next aircraft pictured is a Curtiss 1/2·a sem Jenny. It started out to be just a build-up of the Sterling kit, but its builder, Lenny By LARRY RENGER PHOTOS 8Y AUTHOR Waronker, decided to improve things a • I love model shows! When the IMS contest. Congratulations, Tony, on an bit. He reworked the Sterling plans to Show hits Pasadena and the MACS outstanding feat, even if you didn't use get better agreement to factory plans comes to Long Beach, it is one of the an .049 to do it. (Prejudiced? Who, me?) and then started to work. That cowl and high points of the year. It is exciting to I’ll cut the yakking short this month to engine are metal! There is a super-fine see all the new goodies, and I especially leave room for lots of photos. The first brass screen for the radiator, brass shim enjoy the chance to talk with the real pair of pictures are of Bill Stroman and stock for the cowl, hardwood veneer people behind the products that make his Lohner C-1 free flight scale model. around the cockpits, wire wheels, silk things possible. This year at the IMS Bill took first in F/F Scale at the show for covering, bracing wires, rivets, and Show, for example, you could talk to the second year in a row, using a dif­ various scale fittings. The model is Mark Smith, Duke Fox, Bill Cannon, Bob ferent model each time. The Lohner is powered by a Tee Dee .020 and carries a Novak, Bill Northrop, Walt Schroder, powered by an .035 diesel, the Davies two-channel Cannon radio. The scale of Carl Goldberg, John Brodbeck, Bill Charlton Dart imported from England. the model can be judged by the fact that Wisniewski, Joe Bridi, Hi Johnson, He made up his own plans from the the apparently huge prop is only a 6x4! Charlie Cannon, Rose Rehling, and a book Reconnaissance and Bomber Air­ The smiling chap holding a seaplane is host of others whom I hope will forgive craft of the 1914-18 War. The second Ken Willard, and the model is his latest, me for not calling them out by name. photo is of the seat detail. Bill has a the “ Poolboy.” Ken got turned on by Bill Asasidelight tothisyear’sshow.a new completely detailed scale engine on the Cannon’s latest radio and decided he and unbelievable electric powered cowl which he removed to show me the wanted a seaplane to fly out of his indoor R/C world record of nearly 1-1/2 diesel. backyard pool. (I don’t know if he has hours was set by Tony Naccarato Jr. The Next photo is of Bob Novak’s new actually tried that takeoff yet, but the flight was so long that it precluded any two-channel receiver. Although pri­ model has definitely flown.) The gentle­ attempts by other competitors to make a marily aimed at the race car market, it man in the background in none other flight that day! That’s one way to win a seems to me that this is an ideal receiver than Bill Cannon, by the way. The

Another small scale model at the IMS Show was this JN-4 Jenny, Closer inspection reveals a fantastic amount of detail on Lenny's built from a Sterling kit by Lenny Waronker. Jenny. Uses a Cox .020 and two-channel Cannon R /C .

42 R/C MODEL BUILDER

Our Electric Power columnist's Grumman Widgeon was 3rd in Scale Bill Wendt brought his beautiful 1 /4-scale Farman Moustique but at Astro Flight Champs at Mile Square. Twin Astro 020's, 36 ozs. wisely decided not to fly it in the gale force winds. Astro 15. / POWER i * - By MITCH POLING PHOTOS BY AUTHOR \ • The Electric Championships spon­ gloves, cap, sweater, and all the other pattern, glider, Old Timers, and scale). sored by Astro Flight were first started in northern accessories, and stepped out The free flight events were cancelled 1974, and have been an annual event two hours later into balmy, summer­ due to the possibility of flyaways, but in ever since. This is definitely my favorite time, blue skies, 70° weather. Off with all the R/C flying there were no crashes contest, partly because it gives me a the down parka! It’s lucky for Southern or major damage. This speaks well for chance to get together with other California that the summers are hot and both the caliber of the fliers and the electric enthusiasts, swap stories, and smoggy, otherwise the whole USA would ability of electrics to handle wind. I had generally have fun. The other reason. be living there! the most exciting flights with the Briga­ I’ve got to admit, is the beautiful weather Saturday I went to T&A Hobby Lobby dier; on one flight I caught a standing that prevails in Los Angeles in January. I in Burbank to visit Tony and Addie wave from the mountains and finally had got on the plane in Seattle in freezing Naccarato and admire their winning to trim in full down plus down on the drizzle, enveloped in a down parka, indoor planes, which did nearly 30 stick to get it down after 8-1/2 minutes, minutes on ni-cds and an hour and a half well past the 5 minute max. On its last on lithium cells at the indoor R/C record flight, the winds were so strong that the trials at the IMS Show in Pasadena. I also Brigadier lost ground even headed saw their good-looking Astro 020 U- straight into the wind, and I landed it 500 control WW-II planes built from Guillow yards downwind! The Brigadier earned kits. On Sunday (Jan. 20) I got to Mile its first place in Old Timer, no doubt Square early and tried some practice about it. Bob Sliff came in second with flying. The wind was really strong, out of his Cabin Playboy, and Ross Thomas the east. The skies were clear and the came in third with his Playboy Sr. These temperature balmy, but my Berkeley planes flew very well, but were handi­ Brigadier was practically hovering, and capped in the wind with their geared the Widgeon was blown backwards on systems (the Brigadier was direct drive). its takeoff run! The wind was in the Steve Neu won the glider division 18-20 mph range, with gusts up to 25. handily with his original design Astro 15 When everyone else arrived, we all sailplane. This glider follows the Euro­ stood around, hoping the wind would pean philosophy of lots of power, go away, but of course it didn’t. I could streamlining, and not too much concern see that the contest was on the verge of about weight. The plane has superb being cancelled, so I flew my Cox S-Tee climb and wind penetration; just what with a prototype Astro 035 to show that it was needed for a day like this one. The really was possible to fly. The little S-Tee wing loading was actually quite reason­ practically hovered, but I finished the able; at 60 ounces and 1000 square flight and got a score in sport pattern; inches, it comes out to 8-1/2 ounces per then everyone else plunged in too. The square foot. Bob Sliff came in second Second place in Glider went to Bob Stiff's flying was rough at times, but every with his Super Monterey powered by an Super Monterey, held here by Ross Thomas. event was flown and completed (sport Astro 05, and Bill Calen came in third

Gorgeous Bird of Time with Astro I5, built by Craig Christensen, Steve Neu's original design glider that cleaned up in its event. Astro was another model not flown because of high winds. 15, weighs 60 ozs. Good penetration really paid off.

44 R/C MODEL BUILDER Unusual Blériot V II by Ferrell Papic was one of only two free Bill Stroman and his Stinson Jr. for F/F Scale. Astro 020, 234 sq. in., flights that flew before F/F events were cancelled due to wind. weighs about 10 oz.

Ron Duly has been experimenting with electric C /L models built Bob Stiff's Rearwin Speedster was built from an old Cleveland plan, from Guillow kits, showed up with this really nice Zero. spans 64 inches. Astro 15 with belt drive. with his Electrolite (Astro 05, kitted by to the contests! Steve says that though it is fully aero­ Midnite Models) which was very good Steve Neu, not content with showing batic, it is hard to fly in schoolyards looking. I would have to award the most us all how it is done in glider, brought because it is so fast. Half a dozen of us beautiful glider to Craig Christensen, out his scale Cessna Conquest, much to were pleading and begging for the who came all the way from Minneapolis, the dismay of those who remembered its plans, but Steve says that he just made a Minnesota, with his Bird of Time first place in scale and sport pattern last few marks on butcher paper and that powered by an Astro 15. Craig wisely year. Well, he did it again, easily. The plans don’t exist. What a pity; the plane decided not to try the high winds so that Conquest stomped the competition. It just begs to be published. Anyhow, his model would live to fly another day. flew like it was on rails, the wind didn’t Steve got first in scale and first in sport Craig got honorable mention for being exist for it, and I had to give it an 85 out of pattern with it. Everyone hopes he won’t the farthest travelling entrant. His travel 100 in sport pattern. Nobody else got bring it next year! 1 would like to box for the Bird of Time is quite com- even close, not even the 05 pylon racers. include a photo of it, but that will have to act. Travel boxes are a subject all So. it had to be a twin 15 or 25, right? wait until the next column, as I took a Cy themselves, as I well know, since I Wrong! It was powered with twin Astro color slide of it and have to convert it to bring at least three planes in such a box 020’s with 200 square inches! It had four black and white. Second in pattern went channels packed into its tiny fuselage, to Bill Calen with his Quicksilver Astro and five instead of four cells driving the motors. All-up weight was 30-32ounces. Continued on page 90

Ross Thomas again with another of Bob Stiff's Not too many Red Zephyrs are being built these days. Dale Black's nicely-built version uses models, this one a Cabin Playboy. a geared Astro 15, has an incredibly light structure. Not flown at the meet.

MAY 1980 45 HELICOPTER FLIGHT By M IK E MAS . . . Inverted flight with R/C choppers was considered impossible a few years ago, but our national champion has been doing it since late last year. Want to try it? Here's what's involved. • For years, there have been many comments about what helicopters would or would not do. Sure, they fly around and hover well, but that is about all. But then they were made to loop and roll and do a split-S and even do dead engine autorotations. Even with all of this, the die-hard fixed-wing types would always say, “ I'll get interested when you show me a low inverted pass." Indeed, that did seem like a formidable challenge and maybe even an impos­ sible one. However, great things are never accomplished without a challenge or the setting of a goal.

About eighteen months ago, I made AUTHOR BY PHOTOS up my mind to be the first one in the world to fly an R/C helicopter inverted. So, after determining in my mind just what had to take place, I made the necessary set-up changes to my machine and began to try inverted flight. You Seeing is believing! Yes, it can be done, and by using a radio with reversing switches on all see, there were quite a few things to flight controls, only a few mods to the chopper are necessary for any experienced chopper pilot to do the same. Model is a Schluter Heli-Boy. overcome. First of all, the collective, fore giving Day, 1979. In fact, on the second and aft, and rudder were all backwards flight that day, I was able to demon­ as soon as the machine was rolled over. strate over 12 minutes of sustained To get past this problem, I would hook inverted flight, inverted outside climb­ up one control backwards at a time and ing loops, and even hover. Even though I practice upright flight until I had it had won every major U.S. helicopter mastered. This took a great deal of time competition in 1979, this was the greatest and was nerve-wracking to say the least. thrill of my life! However, the practice paid off, and I was These first successful flights were able to fly around safely with the con­ made with a stock coning angle on the trols backwards. head to prevent boom strike in the event With this mastered, I again tried to do I got into trouble and had to give a hard inverted flight. Now I had an oppor­ rear cyclic command. tunity to study the machine, and I was Now I will try to acquaint you with the determined to fly the helicopter stock so servo set-up and what to expect from that I could experience the true feeling yourself and the machine. I used five of inverted flight. I practiced as much as servos and a standard Futaba 6-channel possible. Now my reverse control prac­ radio. The collective and throttle each Reports have it that Mike can fly so low you had a separate servo, and a sixth servo couldn't get your foot under the blades! tice paid off, and the Heli-Boy managed sustained inverted flight on Thanks­ Continued on page 89

Tank has to have an extra vent and also a dunk pick-up for inverted Arrow points to extra bracket on rotor head, increases pitch travel flight. If the engine quits when you're upside down. . . from normal - 1°', + 5° to - 5°, + 5°.

46 R/C MODEL BUILDER MODIFYING PHOTOS BY AUTHOR structions with the kit, but I but the kit, evenwanted with structions stability. assemble even if you never sawyouassemble if even amodel tendency to build a stall into more and more into astall build to tendency make a of rid also slight and get stability spiral to order In some has limitations. such, asdesign and model, scale further to model basic the in changes eurd bt feprmnain but experimentation, of bit a required spiral the Theseenhance changes greatly height. two rudder lower original inch the an of than 3/4 top the trimming and inch byedge 1/4 leading the tail vertical trimming the of area total the on biggest single factor in increasing the model's stability. model's the increasing in biggestfactor single ev r n h uems hl nterde horn. rudder the in hole outermost the and arm servo fly. to learn to easy isreasonably and before, airplane single-channel Cub Cox new The • ute ipoeet) n diin I durability. the improve addition, In improvement.) further in­ the per out trimmed be can (This increase to the wanted I improvements, as isdesigned a semi­ model basicCub the wings. Besides that, I also cut down Besidesdown Ialsowings. cut that, the To get the least amount of rudder travel, insert the pushrod wire in the innermost hole in the the in hole innermost the in wire pushrod the insert travel, rudder of leastamount the get To isinex­ It it. for going lot has a trainer made a few minor structural changes to structural minor madea few stallsloops. model the more violent until characteristics.The trainer the improve oe i te diin f oyerl to polyhedral of addition the is model Most obvious change, of course, is the addition of polyhedral to the the to polyhedral of addition isthe course, of change, obvious Most pensive, requires only an hour or so to or hour an only requires pensive, MAY 1980 MAY a good flier, but can be made into an even better trainer for first-time for trainer better even an into made be can but flier, good a pilots by making some simple modifications. Why not give it a try? a it give not is Why Hobbies Cox modifications. from simple some Cub making single-channel by The pilots . . . RENGER Y R R LA By Trimming the model longitudinally longitudinally model the Trimming Cub the in change obvious most The Several people have been making making been have people Several O X CUB X O niead mount. engine and ev la. oto sniiiy was sig­ sensitivity Control load. servo inserting a couple of thin washers between the between washers thin of by couple added is aand inserting too, helps downthrust little A and the rudder rehinged to reduce the the reduce to rehinged rudder the and n af n uig h inr ev arm servo inner the using and half in tion of downthrust and wing incidence incidence change. wing and downthrust of tion by acombina­ was improved eventually oeadotr udrhr hole. horn rudder outer and hole rudder the bycutting reduced nificantly aes e ice rm h etr line. center the from inches ten panels Beuse sureto angle to an right accurate On to details! The wing is cut on both isboth Theon wing cut details! to On strengthened was wing the Finally, tips. This is the This tips.

above due to the increased dihedral. dihedral. increased the to due above tremely stable and docile model which which ex­ model an wasdocile and stable however, tremely wanted, I What o o Hbyoy sne t los a allows alignment. it since Hobbypoxy, or con joint very "closed" a a in forms even and bond quickly strong up set will responsive with the modifications given modifications the with responsive cowl. u, fud ht h psrd was pushrod soIawaycarvedfoam smooth a to of the bit that found I Cub, loads. servo reduce to hinges thread 8 surface control rudder the Cut earlier. suchas the sealedI in wing. the foam cell give about a 1/32-inch shim. Gently Gently shim. the andreinstall all fourscrews 1/32-inch retighten a about give washers screws.thin engine two I added Unscrew downthrust. more of addition inches the ten on of tapeabout centered fiberglasspackage of a strip tape adding u tesro od tl more. loadsstill servo the out the fuselagedragging on it exited, where would give the same effect as different asdifferent same effect the give would time. esrl pc i mxn, otn, and coating, mixing, in pace leisurely as Dev- such epoxy 30-minute a prefer Epoxy reachstrength. to full joint the for canglue White this joint. for epoxy only the to panels tip the bond to course, under the top engine mounting lugs to lugsto mounting engine top the under four all screws loosen andcowl two the line. chord 2/3 used I addition, In line. chord 1/3 the You could use tape hinges or inset inset or my hinges On as hingesalternative. an tape pinned use could You I line. used figure- hinge loose the along to turn strongly in the direction of the the of tip. direction higher the in strongly turn to tips two de­ the of on angles couple a Different grees. within angle dihedral just asfine work as have wings long the sameboth 20°will to 15° from Anything cuts sandcarveand two or the sides a of “ pot" or workable life, not the set-up set-up the not life, workable its is or epoxy pot" an “ on time specified The a in result ill w misalignment again, be used, but several days are required required days are several but used, be from tip to tip on the bottom surface atsurface bottom the on tip to tip from length wings, and the model would tend tend and would wings, model the length the carved then and board a of edge mine blocked I them. in angle dihedral four the of each here Take warp! a off-angle asacts as an line, center wing the with line in precisely cuts those get that is, 1/2 hour for 5-minuteepoxy, two two 5-minuteepoxy, for is, that hour 1/2 least atsix pins from with together joint board. The resulting angle was 17°. 17°. was angle the resulting of The end the board. to parallel ends the panel from inches 3-1/2 at inch 1/2 up hours or more for 30-minute epoxy, etc. epoxy, 30-minute for more hours or theepoxy; of time” “ least timesthe four untrimmable even or Here trimmed it. poorly stabilize to directions both the align carefully Very air. avoid to trapped together panels two the Slide joint. the eachof half coaton a thin very main wing panels.I suggestuse wing mainyou that model. Allow all the joints to set up at up set to joints the all Allow model. Pinpanels.the both surfaces of bottom Trim the vertical tail as specified specified as tail vertical the Trim The final step of this procedure is, of procedure this of step final The I found the Cub to be stable, but very bebut stable, to Cub the found I the is model the to change Final by strengthened be may wing The Mix your epoxy thoroughly and smear thoroughly epoxy your Mix Continued 94 pageon Continued 47 Those who were into boating 15 or so years ago will remember the Octura "White Heat" hydro. Here a White Heat on the inside, races another hydro down the backstretch during a multi-boat race in the Chicago area during the mid-60's. All photos this month courtesy of Octura Models.

• Back in the March issue, I began this Deep-Vee Classic? A: The A Deep-Vee class will run column with a discussion of the weather A: Deep-Vee racing is a rather small together. Depending on number of outside my window as I wrote that event in District 8. It would take 40 deep- entries and frequency mix, we may run column. Well, I’m going to lead off vees from outside the district to warrant the B and C Deep-Vee classescombined. another column with a weather report. two days of deep-vee racing. Q: Will there be time for testing? As most of you regular readers (all half- Q: Suppose those 40 deep-vees regis­ A: The course will be open for con­ dozen of you) know, I live out here in ter, then what? trolled practice on Saturday, August 2. Washington. The Puget Sound region, A: Deep-Vee heats not completed on The water will also be open after each where Tacoma is located, is probably Wednesday will be concluded on Thurs­ day’s racing until 6 p.m., and depending best known weatherwise for its damp­ day. on time, it may be open briefly each ness. And we definitely do get our share Q: How long will the Deep-Vee morning between 8 and 8:30 a.m. of “ liquified sunshine." In sunny cli­ Classic race last? Q: When will the entry forms be mates, a model boater could get sun­ A: Four heats of 10 minutes will be mailed? burned enjoying this hobby. Out this offered. A: Entry forms will be sent to all club way, we just get rusty. I would have Q: Will you use an irregular course contact persons around the middle of settled for getting a bit rusty last week­ for the Deep-Vee Classic? February. end, when we had planned to hold a A: We hope to be able to use the Q: What is District 8 “ Sport 40” ? little fun type event at the local pond. proposed Deep-Vee course as devel­ A: The differences between District 8 Instead, the weatherperson threw us a oped by the Deep-Vee Committee. An "Sport 40” and District 9/19 “ Sport 40” real cold front and the pond up and irregular course will be used. are: 1) the length can be from 32 to 40 froze over on us. Now, there aren’t too Q: Will you race all Deep-Vee classes inches, and 2) any type B Class engine many things that keep us "crazies’’ off together? can be used along with a tuned pipe. the water even during the winter months; however, when the pond freezes over, you’re not going to do much model boating unless it’s with an iceboat or icebreaker. With any luck, the pond will thaw by this August in time for the NAMBA Nats. I can just about guarantee there won’t be any ice on the pond come August. I won’t make that guarantee about rain, however. AND SPEAKING OF THE NAMBA NATS The Puget Sound Model Boat Club has been busily planning the 1980 NAMBA Nats to be held August 3-9 on beautiful Wauhop Lake in Fort Steilacoom Park near Tacoma, Washington. Initial re­ sponses from manufacturers has been most encouraging. As of the end of January, we are lacking only four event sponsors. Equally exciting is the number of questions that have been asked about the 1980 NAMBA Nats. This is a good indication that interest is high for this summer’s premier model racing event. (The reader must remember that the author is only slightly biased, since he is the Director of the meet.) In hopes that some of you half-dozen regulars might be planning to attend, some of these questions are answered for you. Top photo shows Gary Preusse's TAS powered Cobra, typical of the boats raced in the larger Q: Why only one day for the Dumas engine classes. Bottom photo shows the Cobra and White Heat about to do battle. 48 R/C MODEL BUILDER Q: What type oi race format will be Deep-Vee or Offshore Racing is be­ anything else. I just wonder if anyone used in Scale Hydro? coming a somewhat heated topic in else thinks it a bit unusual. I'm certainly A: As stated in the R/C Unlimited NAMBA. There are a couple of items not questioning the validity of the rules, each Scale Hydro will be scheduled related to this hull type that are rather records. into three heats. These three heats will unique and interesting .. . at least to this In the NAMBA oval com petition serve as qualifying heats. The top six writer’s viewpoint. The deep-vee design records for X Mono and X Deep-Vee, qualifiers and one alternate will qualify is a dual purpose design. That is, the Bob Finn, from Texas, holds both records for the Championship Heat. There will same boat can race in both Offshore with a Rossi ,69-powered SuperStreaker. also be at least two consolation heats. Racing (and this type of event is rather The record is for the fastest time around Q: Will RV’s be allowed to park over­ open to discussion) and it can race in the NAMBA .9 mile competition oval. It night at the running site? monoplane class heat racing (usually is my belief, and maybe no one else’s. A: RV’s may park overnight at the five laps, using a mill start and starting that Deep-Vee records should be differ­ running site. However, there are no clock). ent from what we are doing in our heat rovisions for light, water, or sewer Another rather interesting circum­ racing format. ookups and the gates to the park close stance that is now occurring is the same This belief issupported in the NAMBA and lock at dark. deep-vee holding records in both Deep- Rulebook in the section dealing with Q: Will boats entering the Dumas Vee and Monoplane classes. I don’t Deep-Vee Class. The following state­ Deep-Vee Classic be required to have know if this is happening in IMPBA, but ment is rather pertinent to my conten­ drivers and hatch covers? it is in NAMBA. In the example I’m about tions: “ This race (Type ‘V Offshore A: Although we would encourage to cite. I’m not being critical of the Racing) is intended tosimulatefull-scale boats entering this event to use drivers record holder, boat manufacturer, or Continued on page 95 and hatch covers, the national rules do not make this mandatory. For its district events. District 8deep-veesare required to use drivers and hatch covers. But this is not a national rule . .. yet. Q: Will retrieving of boats be allowed in the 100-lap Team Marathon and in Enduro Racing? A: Because of the new safety rule about having a chase boat on the water while the boats are racing, no retrieving of boats will be allowed while boats are operating on the water. This applies to all events and practice times. AND LET’S NOT FORGET THE IMPBA INTERNATS A White Heat hydro under construction. Certainly appears to have sufficient structural strength! From the IMPBA 1979 4th Quarter An O&R Compact industrial engine (1.3 cu. in.) was used. Report, the following information was provided about the 1980 IMPBA Inter­ nats. The 1980 IMPBA Internats will be held at Bartow, Florida, August 11 through 16. It will be hosted by the Florida Associated Speed Team, better known as FAST. Bartow is located in central Florida, about 12 miles from Lakeland, Lake Wales, and Winter Car­ den. It is within aone-hourdriveofsuch attractions as Disney World, Sea World, Circus World, Busch Gardens, and Cypress Gardens, as well as many other attractions. Jay Maguire will serve as Contest Director. For more information, contact Jay at 2210 Maple Hill Dr., Lake­ land, FL 33803. GOING BACK TO THE QUESTIONS Another mid-60's photo, this one of Gary Preusse's TA S powered original design hydroplane. ABOUT DEEP-VEES Model boat design sure has come a long way in I5 years! MAY 1980 49 CLUBS“ a°GREAT ONE! By GEORGE W ILSON . . . Model clubs are a dime a dozen these days, but only a few are considered by their members to be truly great clubs. Our guest author tells how you can make your club one of these. • Many clubs seem to drift along and the rules may be temporarily suspended bers from being sued for damages that frequently struggle to stay afloat. It has by a majority vote of those present. may result from club activity. The club been the writer’s observation that most The by-laws should define the format can be sued as a corporation but is liable of the problems result from poor man­ for regular meetings. The business part only to the extent of the club's finances, agement. For this purpose, let us define of the meeting is not what people come which should be small in the case of a "management” as the art of getting to meetings for. Keep it short! Similarly, relatively small non-profit organization. things done by means of people; in this do not overdo the feature of the eve­ This fact in itself will make it impractical case, the club members. There is no ning. A 45-minute talk followed by a for anyone to sue the club. However, reason why a club cannot be a great question period is the general rule for incorporation of your club in no way experience for all concerned; the man­ success. protects you from liability for which you agement concepts required are simple. It is important to understand the are personally responsible. Make sure This article covers some of the ways that proper use of committees and a Board of you are personally covered by insurance can help to make any club a great club. Directors. Most controversial matters if you can be liable for damages to The purpose for a club's existence is are best handled by a small group of others. probably the most important factor in people. The annual contest, changes in The cost of incorporation for a non­ making it successful. The purpose and the by-laws, selection of a new meeting profit organization is generally less than the closeness with which the member­ location, and similar topics are best $100 and may be well worth it to the ship sticks to this purpose can determine handled by committees. Do not use membership and/or officers if some success or failure. It is better to have a valuable meeting time discussing the wild-eyed claimant decides to be unrea­ small group of dedicated members than specifics related to subjects that are best sonable. After incorporation, make sure to have a large group of members handled by a group of experts within the proper reportsand fees are filed in a complaining that their interest is being your club. Once delegated to a commit­ timely manner. These are minimal for neglected. This is not to say that a club’s tee, a matter should be handled entirely non-profit groups but insure the con­ catering to the many facets of the hobby by the committee unless it involves the tinuation of the protection afforded by will not work. But it does say that the long-term operation of the club or a incorporation. purpose of this type of club must be substantial financial obligation. Again, Club officers should remember two clearly known and its members must be the goal is to make your meetings of important things when they select peo­ well diversified in their interests. Such a general interest and to avoid tedious ple to be a slate of officers for next year, club may well serve as a council for the details. the members of a working committee, specific interest clubs in the area. Here, Many successful clubs handle essen­ or do any other task for the club. its purpose would be Public Relations tially all of their business through use of Whatever it is, select people who are and the exchange of information be­ a Board of Directors. This small group talented along the lines o( the job to be tween specific interest clubs. Its mem­ can meet relatively informally and make done and who want to be involved in bers should consist only of those inter­ decisions that would use hours of meet­ such a job. Sounds simple, but many ested in its purpose. ing time if handled by the club at large. times the popular contest winner is Even in the specific interest clubs, Again, long-term obligations and/or proposed for President when he has no there is generally a division of interest substantial financial commitments talent or desire for running things. It is between contest fliers, sport fliers, and should be voted by the club. by far better to re-elect a good President the technically inclined members. It is II the club can in any way incur liability who enjoys his job than to put a new my conjecture that many clubs have for damages, it should be incorporated. man in office who does not really want failed primarily as a result of wrangles This will protect the officers and mem­ Continued on page 98 over contests. If your club is really a forum for contest planning, admit it and have at it. Do not be surprised if the Sunday fliers are not interested in membership. A brief set of by-laws calling for the use of Robert's Rules of Order as guide­ lines for conducting meetings is a neces­ sity. The by-laws should state the club's purpose and requirements for member­ ship, such as dues structure; typically, full member, associate member, and newsletter only. A complicated set of by-laws is an invitation to wrangles during meetings and should be avoided. Here is the place to warn you about "Charlie Parliamentarian.” This char­ acter is always a member of your club but usually uses a pseudo-name such as John Smith or Eddy lones. He is an expert on Robert's Rules of Order and will interrupt your meetings at the slightest opportunity if you deviate from the rules or order. This is why Robert’s rules should be used as guides, not as iron­ clad requirements. If you expect this sort of problem, write into your by-laws that

50 R/C MODEL BUILDER ...... HANNAN'S HANGAR . . FREE FLIGHTFREE FLIGHT SCALE . F.A.C. TRAINER CONTROL LIN E PEANUT STEARMAN 4E AND fBEE_FLIGHr PpA/TROL LlN£ From master modeler Bill Noonan. San Diego, California, comes this photo of his latest Peanut, a rare 1924 Martinsyde Semiquaver racer. Bottom wing a symmetrical has the originalairfoil aircraft and justalong forgoes was flown the ride; bytop wing race all pilotdoes the Frank lifting. Courtney, Of special interest who is that is now pushing 85 yearsof and age living in San Diego.

MAY 1980 CJ1 At left is a Combat ship that Steve Wright is selling ready to fly. Can be had in this tapered version or with Voodoo style straight wing. Both are real good Sunday fliers and good enough for most contests. Above, a different design by Steve, features K&B .21 and minimum of parts.

PHOTOS BY CHARLIE JOHNSON

ontrol line By "DIRTY DAN" RUTHERFORD

ABOUT THE NON-EXISTENT (SO FAR) having all of the Mystery Model features, who first fired up the letter writing now NATIONAL CONTROL LINE SOCIETY maybe in the C/L column we ought to going on, some of them being published Got a few interesting letters right after have a Mystery Message contest once in in this magazine’s “ Three if by Air’’ the writers of said letters read over the awhile. I could give you the particular column . . . you know, how the F/F guys column in the March 1980 issue of magazine to look for, you would read say that the new title for the mag is RCMB. Several pointed out that they the C/L stuff more carefully and then contradictory or that the title is OK, had expected more and better answers turn in your version of the underlying keep the content good and all of that. to the problem of promotion of C/Land thought. The person who was correct, or Steve has always had a talent for the formation of a National Control Line the most imaginative, would get a stirring things up and is one of the most Society in particular. One even pointed freebie of some kind. enjoyable people I have ever run across. out that the closing statement of that It would be a lot like the old word Now he is at it again. The newsletter that particular piece was lacking. battles we used to hear around the Steve is involved with is entitled The Bat Now, I don't mean to be super tricky Combat circles and newsletters about Sheet, and being a free-thinking soul, he in my writing, even though I will once in how easy it was to go 120 mph with a and several others are always coming up awhile form thoughts and words into a Combat model . . . imagination and with plays on the title of the newsletter, mass (mess?) that somewhat parallels the creative thinking would play a much references to Bat Man and so on. Terrific subject. At the slightly less-than-con- larger part than the actual feat. newsletter. scious level, that is what I did with the Now there has been another title writing on the as yet unborn NCLS. STEVE HELMICK change, to more accurately reflect the With C/L, we have all of this latent That’s the name carried by the fellow newsletter and its audience of readers. It potential for outstanding growth; C/L is now called the R/C Bat Sheet, with just happens to be a form of modeling R/C standing for "Really Cool" . . . that is easily promoted. But without an maybe that is not funny to you right off NCLS, C/L as a modeling form doesn’t the bat, but the R/C Bat Sheet is a have any specific direction in which to newsletter devoted strictly to free flight go, which results in a few of us going off modeling with heavy emphasis on the in all sorts of directions, some of which high-technology FAI events. Now it’s lead to dead ends. And without the funny, right? NCLS, C/L itself doesn't seem to have MACA NEWSLETTER BACK either an opening or closing statement IN BUSINESS of any kind. That was the thought Word is that Ben Sanett, who had floating around in my head when writ­ edited the MACA (Miniature Aircraft ing a few months ago, and so the bit on Combat Association) newsletter for NCLS ended the way it did. quite some time, finally had to give it up. SAVE YOUR TIME. .. After a lapse of about two months, Frank To those rushing about, finding back McCune has decided to give it a shot issues of RCMB and planning on digging and is now into cranking out the good out the “ hidden message” in past C/L word on Combat and all related hap­ columns, you probably would be well penings. off to just save your time. I don’t do it If you would like to know, you can that often, although a couple of times contact Frank at Box 141, Blane, PA two years ago did it so well that even 17006. To join MACA, an act that will see WCN had the thought go straight past you getting the newsletter as well as his head, as evidenced by the parenthe­ being a part of all the things MACA does tical comments Bill used to slip into to promote Combat, send the $6 annual everybody’s text, not just mine. Ron Hester about to release son Russell's dues to Jordan Segal, 8314 W. Oak Ave., A thought. With the F/F column 1/2A at San Diego fun-fly meet. Niles, IL 60648. 52 R/C MODEL BUILDER ’79 BLADDER GRABBER Actually, I could have written about this contest a lot earlier, but never remembered to do it each time I was trying to meet another deadline. How easy it is to forget when you don't w in ... However, Mike Petri won’t forget this big meet, one of the legendary Fast Combat contests taking place annually. Mike and team partner Rich Brasher flew up for the Big One and disap­ pointed all of the northwest Combat fliers by working their way up to the final match, although neither was unscathed by the time they got there. Rich had some bad luck in an early match, so had one loss going into the final shoot-out (double elimination contest, so one loss does not put you out). I had gained (very) slight revenge using trickery in the Mike Hoffelt's new 1/2A Monoboom with a new style Tee Dee .049. Note trim tab for fine form of a slow start, getting in the air tuning. Is said to turn even better than a certain Dirty airplane. second against Mike. A bit of super timing on the part of the pit crew in simply went for the kill. Another thing By the time of the final match we had a launching the model helped surprise that made it so interesting wasthat while pretty good crowd of spectators who Mike with a quick kill before he even Mike is smoother. Rich has all of these appreciated super flying, and so both had a chance to come out of level flight. wiggles and really low passes at the Mike and Rich got a tremendous round So, going into the Final, both Mike ground to toss into the action. Just when of applause with the contestants them­ and Rich had one loss, meaning that you think you have Brasher dead, be­ selves probably applauding the hardest, their first match was to be the deciding hind and above him with his model fairly as they knew better than anyone what a one. And they both went for it. Mike low, he will tuck inverted. Even if you fantastic match it had been. Mike had started out fast, while Brasher seemed to can make the outside loop without won it, his earlier cuts coming in very wait patiently for a shot at the kill, crashing, he will then shake you off with handy, but matches like these don’t getting down a couple of cuts pretty a few flicks of the wrist, all of a sudden promote cheering for just the victor. quickly. It was a super match to watch, as being right on your tail. As usual, the Bladder Grabber prizes Mike seems to take every opportunity to So the final was really super. They were outstanding. Mike went home get a cut, even if while doing it he has to both went at it hard and heavy for a full with a complete Phase Linear system; lose the following position. Mike is load of fuel and Mike was almost ex­ amp, pre-amp, receiver, and ultra-trick aggressive, yet his flying is solid and hausted. I suppose Rich was feeling it speakers. I think the total retail price in smooth with only occasional wiggles or too. but he wouldn’t show it. With the this package is something like $2500, so it super-low passes made. Brasher, on the score about 3 cuts to 1 (I think) in favor of is a big-bucks thing. Rich took home other hand, only seems to bother with Mike, they went back up for some really another set of speakers, to go with the taking a cut if he thinks his opponent hot flying, as both knew it was past time ones he had already won as pari of might try to get ahead on cuts and then for the match-ending kill and neither complete system at an earlier Bladder punch the model in the ground. Rich is wanted to be on the receiving end of it. Grabber. there for one thing only and that is to get It ended up being a mid-air, which was In the future we will probably pass a the kill; he can often be seen to get in almost predictable. Sometimes you get supplemental rule to the Bladder Grab­ the streamer only to completely disre­ two guys flying and they have each other ber, preventing export of B/G prizes to gard it, instead working his way up to the pretty well dialed in, so know how to the Northern California area.. . knot. As Mike is a flier who wants to win avoid the kill. As the match goes on, BEFORE THE BLADDER GRABBER or lose in the air and with a kill, not by each tends to take more and more Going into the B/G, I had not flown a adding up the cuts scored. Rich didn't chances, trying to come up with the competitive Fast Combat model for have to worry about his opponent quick hit, and the result is often a mid­ several months, and so was real con- “ Chicken Crashing’’ on him and so air. Continued on page 91

Dale Long, Leonard Ascher, and Dave Braun pose with Dave's latest design for Slow Rat. A real screamer, it turned 14.9 first time Dave Braun calls his racer the "Super F li"; looks like it would make Combat types at home in out. the racing circles. Uses O.S. .36 with Nashville type tank/filler assembly.

MAY 1980 53 years. Plastic propellers are specifically excluded. More than one model may be entered by each contestant, but only one may be selected for final judging and scoring purposes. Non-modelers will not be eligible for judging duties, incidentally. The competitions are intended to be conducted each year in conjunction with the U.S. F/F Championships held at Taft, California. Certainly this award honoring out­ standing competitor and Jumbo scale enthusiast Ray Berens represents a most imposing inducement to competition- minded model builders. AND SPEAKING OF CONTESTS Interest is growing in the First World Peanut Gran Prix, being held in con­ junction with the World Indoor Cham­ pionships during June. West Baden, Indiana will be the site for those for­ tunate enough to attend in person, but proxy Peanut entries are anticipated, including some from foreign countries. • Our lead-in quote this month, by striving that the Wakefield Cup has Volunteer proxy fliers and helpers are Jean Rostand, ought to be reassuring to attracted. However, the sponsors of a needed, and additional details may be model builders. Seeking that elusive new award are aiming at exactly that obtained from Mike Arak, 10900 SW 61 “ perfect” design should keep all of us status and lofty goal with the introduc­ Ct„ Miami, FL 33156. youthful! tion of the Ray Berens perpetual trophy. THE GOLDEN GOOSE Scale modelers have a special obses­ Conceived and donated by Loren A. Ten bucks per head! That’s the fee sion in this continual quest for the ideal Williams, Cliff McBain, and Richard announced locally for gaining admission subject, since they are concerned not Seifried, the award is intended to "pro­ to view the Howard Hughes wooden only with flight performance para­ mote competitive flying scale models of flying boat, which has been the subject meters, but also the much more diffi- ever-increasing quality of subject selec­ of mystery and controversy for so many cult-to-define static scale points gather­ tion, fidelity to scale, construction years. However, a cliff-hanger to the ing capabilities. Of course, one's scale design, workmanship, and flight dura­ bitter end, no official opening date for specialty can affect the decision-making tion capabilities.” public admission has been set as of this processes. While the mammoth scale The imposing trophy, a 14-inch-dia- writing (late January). Perhaps “ Summa clan is proclaiming "Big is Beautiful,” meter German silver bowl mounted these days" we will finally have a chance Peanuteers might well counter with atop a two-foot high walnut base, fea­ to peek at the big bird. "Small is Super.” Meanwhile, a certain tures individual nameplates for each of CONGRATULATIONS! segment of builders, regardless of size the winners for its ten year projected To Tony Naccarato, of T&A Hobbies, preference, have a different formula for competition life. The event rules are for establishing a new indoor R/C fixed- subject selection. They are attracted by sealed in plastic on the back side of the wing aircraft endurance record of 1 easy-to-duplicate configurations, as trophy and have been written in a hour, 29 minutes, 33 seconds during the pointed out by Frank Scott’s motto: specific and unique way, whereby cer­ recent IMS Show. Certainly that was a “ Square is Beautiful!” tain design parameters are changed over remarkable demonstration, not only of A NEW CHALLENGE OFFERED a period of years. electric power system efficiency and In the entire history of model aircraft By way of a brief sampling, entries will model aircraft stability, but of Tony’s competition, few events have gained the be limited to Jumbo rubber-powered stamina! prestigious status of the Wakefield. scale models with a minimum mono­ GOLD FLIES Certainly there has not been any direct plane wingspan of 36 inches or minimum The rise of gold prices has astounded equivalent in the world of scale model­ multiplane span of 30 inches. These span even the most optomistic “ gold bugs.” A ing to attract the sort of international limits will be increased slightly after two Continued on page 88

George James (left) and Ray Berens with the new Jumbo Rubber George Chaulet's wife, Leone, shows off his latest creation, an R/C perpetual trophy presented in Ray's honor. vertiplane with O.S. .40FSR .

54 R/C MODEL BUILDER

awarded for placing first at a Team Selection Contest. 3) Three additional points will be awarded for maxing out at a Team Selec­ tion Contest. 4) The maximum number of points that may be earned in one event at any Team Selection Contest will be 15. 5) The CD of the Team Selection Contest will verify the participant’s plac­ ing and points earned, enter them on the Program Qualification Form, and collect a $5 fee to be sent to AMA HQ with the contest report. 6) The participant is eligible for the Finals when he accumulates 25 points in Team Selection Contests and sends a copy of his Program Qualification Form to AMA HQ. 7) Members of the 1981 Free Flight Team are also eligible for the Team Finals, provided they obtain a Program Qualification Form and fly in at least two Team Selection Contests. This method of Finals qualification would be a vast improvement over the current system, in my opinion. It would eliminate the “ suddent death” semi­ finals. Contest participation in FAI events would increase, with activity continuing throughout the entire Team It might be argued that those who live Selection cycle. New faces could enter in regions where there are a lot of fliers the program at any time, without having would have a much better chance of to wait for the next cycle. The Nats and qualifying for the Finals than those in USFFC would be important parts of the c-ther parts of the country. Well, that is program, since large contests would be the current situation, since the number worth more possible points. The year of of fliers advanced to the Finals from a the Finals would see more activity, with semifinals now depends on the number additional people trying to qualify. Most competing at the Semis. This proposal importantly, this method would select allows bonus points for winning or Finals participants for the most impor­ maxing out at Team Selection Contests tant trait of a team member: contest so that the better fliers in a sparsely flying ability. populated region can still accumulate I arrived at the figure of 25 points to points as rapidly as those in other areas. qualify for the finals, based on a flier In addition, the Nats and USFFC are finishing in the top five at an event with large contests with nationwide repre­ ten contestants at five contests. I feel sentation. Those from isolated areas that this kind of performance would be could compete there in addition to sufficient to demonstrate the consis­ contests in their own region. These tency and quantity of contest flying would be good opportunities to ac­ desired in a Finals participant. The 25 cumulate points and gain experience in points could also be earned in these national competition at the same time. Don Zipoy launches his "Crispy Critter" FA I ways: It might also look like a lot of travel model at Harts Lake Semi-finals. It's this A) Maxing out and winning two con­ would be required. Since most of the month's featured 3-view. tests with five entries each, plus beating Team Selection Contests would be one other contestant at a third contest. regional, the longest trip to any one contests to qualify for the Finals, so the B) Winning three contests with a contest would not be longer than a trip number of miles traveled would increase minimum of five contestants. to the present semifinals site. Most of only slightly. Those who would need a C) Finishing ahead of 12 or 13 con­ the Team Selection Contests would be lot of contests to qualify would benefit testants at two large contests. Each of established regional contests that the from the practice, and Program funds these examples would be the type of FAI competitor would probably attend would increase each time they flew. flier who deserves a place in the Finals, I anyway. The better fliers in a region I don’t think there will be a problem believe. would probably take no more than three with too many people qualified for the

MAY 1980 59 60 R/C MODEL BUILDER 1978 Taft Finals, except for the use of light-lift instead of dead-air rounds. It emphasizes consistency above all else and relies on picking the top three rather than the three winners. In such a contest the top three tend to be the survivors of an endurance contest, particularly in bad weather. Format C was used in Hastings. It is easier to administer than the other formats, and resembles the World Champs in format, but has the disad­ vantages of B without any real advantage. * · · MODEL OF THE MONTH: Don Zipoy’s “ Crispy Critter” Don is the epitome of a perfect contest director, running the best- organized meets in the country. He’s Dale Segle took a lightweight clockwork mechanism from a bathtub toy and made it into a DT been the perennial C.D. for the North­ timer for HLG's. Photo on right shows how it mounts into the fuselage, left photo shows DT line, release mechanism. Shaft made by soldering brass discs to brass tube, a la Seelig. west Regional FAI Semifinals since 1965. since nobody can imagine anyone else doing the job half as well. However, his Finals. If as many as half of all the current tions, followed by a flyoff in light-lift secret ambition has been to FLY at one of semifinalists qualified, that would be conditions, for the top three at the end these Semifinals, not just sit behind the only about 40 per event at the Finals . . . of seven rounds (or all those within 98% table. This year, he succeeded in quali­ not a lot more than at present. The FAI of a perfect score, whichever is the fying in FAI Power by putting up five committee could adjust the number of greater number). Three flyoff rounds, to straight maxes with the design shown points to qualify for the Finals up or 4, 5 and 6-minute maxes, would be here. When the big day arrived, how­ down before the start of the next selec­ flown. The winner (with the highest ten- ever. Don was bugged with timer and tion cycle, if this is a problem. (They round total) would be a team member. tank problems, registering four con­ could also decide to select only a certain B) Select three team members on the secutive overruns. The biggest cheer of number of top points qualifiers, but this basis of total score at the end of a three- the contest arose when he finally got in a would be a more complicated system to day, six-round per day, contest. One flight, followed by another that maxed administer. The idea of a minimum round each day would be flown to an FAI contests are not always grim compe­ points total for qualifying makes it easier increased max, in light-lift conditions. titions, I guess. for the participants to know when C) Select three team members on As is obvious, the model follows none they’ve qualified, rather than relying on basis of a one-day contest, with seven of the current FAI trends, although it has a final tabulation.) thermal rounds plus three forced flyoff a vague resemblance to Horcicka’s 1973 FINALS FORMAT rounds, as in A. In this case, the top six at Power winner (I don’t know, all these Nearly every program participant end of seven rounds (or all with 98% of high-thrust line power models look agrees with the idea of a Finals in one perfect score, whichever is the larger alike to me). The wing and tail date back location. Here are some ways the Finals number) would fly off. with the top to the early days of the Pan American could be run, listed in order of prefer­ three becoming the team. International Class Payload event. But ence: you’ll have to admit that you don’t see A) Select one team member in each DISCUSSION/RATIONALE many 20-year-old FAI Power models. event on each day of a three-day Finals. All three methods would provide for a (You don’t even see too many one-year Fly seven rounds under thermal condi- combination of thermal and light-lift rounds to select the team. At the last Taft Continued on page 74 Finals, the winners were the ones who did best when there was light lift (the latter part of the early morning round, when there was enough lift for a max; not the pre-dawn, dead-air conditions), as there would be in a World Champs flyoff. Format A would serve to select those who can come through and win on a given day. I emphasize winning, be­ cause there’s a big difference between coming out on top and merely placing in the top three in an event. A team made up of three fliers who came through by making the big play and winning the contest they had to win would be the kind of team most likely to do well at the World Champs. They would be the real competitors, particularly the ones who would win their team place on the last day. All who fly in the Finals would have earned their places by virtue of The USSR FA I Power virtuoso, Eugen their consistent contest success, and the Verbitski, in action at the 7 3 World Champs. added pressure of having to win to make Russians boycotted W/C in U.S. last year. Word has it that Verbitski is now in Cuba, a place on the team would allow the training the Cuban national team. cream to rise to the top. Gene Jensen in a Mt. Rushmore pose, hold­ Format B is similar to that used at the ing his Korda. Seen at Silents Please meet. MAY 1980 61 FREE FLIGHT SCALE By FERNANDO RAMOS • In last month's colum n, I briefly mentioned Bill Hannan’s latest effort, a book entitled Peanut Power. Sincethen, I have had a chance to review it, and I consider it a must for any F/F modeler, even though he may not be specifically involved with the building and flying of Peanut models. Bill is not only a fine writer, but also an excellent artist and photographer. These talents are well expressed throughout the pages of this outstanding publica­ tion. One quick glance at the table of contents and you will know that this subject area is well covered. The items include a brief history of Peanut Scale, selecting a subject, materials that can be used, adhesives, research, flying, a problem-solving chart, plus many more. The cost of this book is $7.95 plus $1 Ray Berens today, with the beautiful trophy for postage (California residents add 6% for the new Jumbo Rubber event commem­ orating Ray's achievements in large rubber for tax), and can be ordered from the scale models. See text for details and rules Historical Aviation Album, P.O. Box 33, for the new Jumbo event. N FFS calls it the Temple City, CA 91780. This fine effort Well-known rubber model expert, Ray Berens, "Wakefield of Scale Modeling." reflects 2-1/2 years of hard work! as he appeared in 1940. Unidentified model On the "what's new” scene, I received is typical of the type being flown at that time. a sample of Flyline’s latest project, the p oint. By d ivid in g 360° by 5, each .020 version of Megow’s Flying Quaker. cylinder, in this case, will beset 72° from The kit is of the usual Flylinequality.and like to outline briefly the method I used each other. Therefore, by using a pro­ the plans are typically Herb Clukey . . . on Flyline’s Kinner Sportster. The first tractor, I will make five separate angles super! The drawings show an R/C instal­ step, and one that gives me a bit of a indicating exactly where each of the lation. but I plan to make mine a sport pain, is drilling the five holes (five cylinders will go. These angles, repre­ F/F m odel. This kit makes an easy cylinders on the Kinner) in the block sented by lines, are continued to the introduction to the world of Old Timers that will support the cylinders. My edge of the block. I might add that I will at a minimum cost and with either F/F or method is certainly an easy one (see use a different colored pen from the one R/C. Check it out at your local model sketch). I first locate the center of the I used to draw the perpendicular lines. shop. block by the old traditional way of This way, I will not make a stupid mistake drawing lines from corner to corner so by drilling on the wrong line . . . I hope! that you end up with an "X” in the Radial engine aircraft are, for the most center of the block. I then draw perpen­ The block is now ready to drill. This part, tough to model due to the com­ dicular lines which intersect the exact should be done, if at all possible, with a plexity of the dummy engine. Even with center. These perpendicular lines will be drill press. I use a drill vise, and with the the use of Williams Bros, cylinders, it is used a bit later. aid ofa 90° triangle, I sel each linesothat still a chore, particularly since crank­ The next step is to find out at what it is vertical with the drill. Each cylinder cases aren't provided in the smaller angle each cylinder is set. Since radial hole is drilled, drilling all the way to the scales. So. what is an easy approach to engines usually have one cylinder at top middle of the block. Sometimes one of making radial engines? Well. I would dead center, this becomes the starting Continued on page 80

62 R/C MODEL BUILDER PHOTOS BY AUTHOR appealing little rubber job is the next logical step up from the Delta Delta the from There isup a step and magic nowhere • inflight, logical next isthe job rubber little appealing ise wns Fruaey sc a ship a such Fortunately, wings. tissued flier! Great Juniors. ith w popular this so models Club, Aces Cub A Flying AM and famous Dart the after Named . . . SCOTT FRANK By FAC eminently suited for the beginner, but but design, beginner, the for straight-line suited eminently simplified, its of is,because Club) Aces Flying far-flying The F.A.C. Trainer. our it’s if too, sive andinexpen­ easy build to quite be can through dancing sunlight the overhead, rubber- a in than evident more this is These resulting patterns, or templates, templates, or patterns, resulting These card­ thin to this) for good is cement h vtrn modeler. veteran the satisfythan more will qualities flying its F.A.C. the (named famed for andTrainer high silently wheeling model powered the balsa nose pieces and wing ribs areribs wing balsawhile pieces noseand the knife the guide to used then are fuse­ and rib wing the tracing by begin wing ribs. Uses triangular tail surfaces similar to Delta Dart. from tissue and doped on, really adds to the model's appeal. model's the adds to really on, doped and tissue from cut is Trim assembly. for ready and covered components, the All Dart. Delta to similar surfaces tail and piece nose triangular Uses the are parts curved ribs. only wing The simpler? be could What board, and then carefully cut to shape. to cut carefully then (rubber and board, glued then is This pattern paper. paper thin onto piece nose lage MAY 1980 MAY To build your own F.A.C. Trainer, Trainer, F.A.C. own your build To TRAINER copied, or ruthlessly slashed from your your slashedruthlessly from or copied, to prevent the workboard from becom­ from workboard the prevent to isimportant covering plastic This wrap. isdone. ship the in of part hardest wood the the pass. through out, theseparts cut one With only cut to trying of instead knife, the cutswith several light isit shape.to that cut Remember usually the wing on the building board, prop up prop board, building the on wing of the center the holding While center. the the remove the dried, When has place. thoroughly glue in very the glued are (except gussets center) and ribs alland plan the over place in pinned then food plastic clear of piece a with plan the andcover board a flat magazine)on such parts cut satisfactoryto using more pins and cut or carefully crack the the crack carefully edge spars or andtrailing leading exactly at cut and pins wing The model. your edge sparstrailing are and edge of leading part a ing o ly h pa (rcd photo­ (traced, plan the lay Now to dry. Lightly sand off the resulting fuzz resulting the sand Lightly dry. off to tissue the is be to this and adhered, allow bare structures a givethe you if coat cult diffi­ all at not is operation Thistissue. an inch bigger in all directions than the the than directions all in the bigger inch an with begin dried, has this When coat of dope. thinned andanother apply areas where those along dope clear of ise s tahd o l prs n this in parts the all and to sticky, attached is dope tissue underlying and tissue the the through right thinner tissue about of apiece cut and fuselage model lightweight with cover to ready and bound in similar fashion to the the to fashion similar in bound and cut to how (Know tubing aluminum carefully to the building board while while board them building weight the or to pin carefully and parts water the bottle) with spray Windex a with make will This frame. doped the onto brushthe thinner, ain dope using brush dipped Now, frame. the upon position tissuein laythe and becovered, to part lower longeron. lower a of blade the under it Roll tubing? of length a from cut is bearing thrust be the mayedges aresquare. bestleft though The propeller sandpaper, too with fuselage smoothed the dry, When place. into glued uprights andthe and down piece nose the The like parts. much flat built other is variety, profile surfaces mayalsobe flying the of all of edgesandsuch. trailing and Theleading re­ be can fin and stabilizer the dry, balsa, strip of built structures flat simply manner. After covering, lightly spray(as lightly covering, After manner. motor hook, formed from wire, is glued wire, from formed hook, motor place rear The thread. in sewing wrap­ cotton of with pings glued bound and nose then the under knife), hunting pinned are longerons lower and upper glue of bumps and to lumps sandpaper the fine remove with sanded lightly wing structure is completed by adding adding by completed is structure wing The place. gussets in its and rib center the glue andinches 1-1/2 tip wing each rounded with sandpaper at this time. this at sandpaper with rounded and board building the from moved When airplanes. Cub” A ‘‘Delta "AM and popular Dart" the of those like much the two upper spars. upper two the The fuselage, being of the built-up built-up the of being fuselage, The o te aiu asmle wl be will assemblies various the Now h fae fr h ti srae are surfaces tail the for frames The Continued 66 pageon Continued 63 7 ^ - \ / 8 " SQ LEADING EDGE X

1/16" SQUARE SPARS

DIHEDRAL PROP UP EACH WING TIP 1 1 /2 " WING

/ \ I/I6 " X 1 /8 " TRAILING EDGE —? /

64 R/C MODEL BUILDER I

^/^-I/I6"SHEET GUSSETS \ \

CONTROL SURFACE OUTLINES ARE OF THIN TISSUE STRIPS

” ” " 7 / \ \ 7 .

MAY 1980 65 they dry. This will help prevent warping. facilitate tying the knot. Wash the motor you’ll have to slightly crack the top of A single coat of clear dope, mixed 50-50 well in cool water before tying with a the fin. As an alternative to cracking, a with thinner, should suffice to seal the square knot. Trim the excess ends and small paper or balsa trim tab may be tissue; again, pin the doped parts down install on the model. glued to the fin’s T.E. Any tendency to to prevent warps. (The trick here is to pin Before proceeding to the areodrome, stall in the glide can be countered by them down right after the part is dry to it is well to give your completed ship a adding nose weight, or by adding turn. the tough. In that way they’ll not catas­ good preflight inspection (this holds The opposite holds for diving. trophically stick to the board.) true for any model, new or old). Begin Now that you've got your F.A.C. Preceed now to final assembly. This is the inspection by seeing that all of the Trainer trimmed out to fly the way it most easily done by applying a bead of parts are intact (no broken structure or should, you can pack a lot more turns model cement along the center rib of torn tissue), securely mounted in place, into the motor by unhooking the rear of the stabilizer and setting the fuselage in and free from warps (twisted wings and the motor from the rear hook and place on top of it. Make sure that the tail surfaces). If a warp has crept in, it can stretch-winding the motor with a winder. fuselage is perpendicular to the stabi­ be readily removed from a light model Of course, when you do this, be ready lizer. Attach the wing by sliding it like this by passing the affected part for a long, happy chase. through the slot formed by the lower through the steam issuing from a tea­ F.A.C. TRAINER MATERIALS LIST longeron and the nose piece, and ce­ kettle (wear gloves!) while gently twist­ • Balsa: ment it in place. Align the wing ac­ ing the part in opposition to the warp. (1) 1/8 X 1/8 X 36 curately with the fuselage and allow to Hold it thus until it cools. (2) 1/8 X 1/16 X 36 dry before adding the fin, sub-fin, About the last thing to check is the (1) 1/16 X 1/16 X 36 headrest, and windshields. The landing balance of the model. With any kind of (1) 1/8 X 2 X 7 gear is simply slipped over the nose luck at all, your model ought to balance (1) 1/16 X 2 X 12 piece and secured by sewing it to the just fine as you built it, but if not, simply (1) 1/32 X 2 X 12 nose piece with needle and thread. add a dab of modeling clay to the nose • 1/32-inch diameter music wire. Bend the hooked end of the propeller or tail until it does balance right. Finally, • 3/4-inch diameter wood or light shaft to shape and insert the shaft put just a wee drop of oil on the pro­ plastic wheels. through the bearing, slip on a small brass peller shaft. • 5-1/2 inch diameter North Pacific washer or two, and then the propeller. A The customary hand glides over tall plastic propeller. right-angle bend of the shaft will keep grass will probably accomplish little, so • Small brass washers. the prop in place and allow the free­ just wind the Trainer up about 50 turns • 1/16-inch O.D. aluminum tube. wheeling cam (molded on the prop hub) and launch it in a level attitude. If all • Blue and yellow Japanese tissue or to work. The addition of the rubber goes well on this flight, simply add about other very light model tissue. motor will complete the ship. Inci­ 25 more turns for each successive flight • Thin sheet acetate. dentally, it is unlikely that you will find until you approach the maximum for • Clue, model airplane cement, clear rubber bands of the proper size, so the your motor. dope. correct way to make up a motor is to cut Should you wish the model to turn, • 3/16-inch rubber, approximately two a length of rubber twice the length of gently bend the trailing edge of the fin in feet long. · the loop, plus about four inches to the appropriate direction. To do this.

66 R/C MODEL BUILDER Superscale detail your RC12E Our Lexon1 Toj-303/ Cosworth. vacuum-formed body featuring custom paint and hand- fabricated cold alrbox. mirror and ‘'Warsteiner'' sponsor decals (not included in kit). GO RACING WITH THE TEAM. If racing is the name of your game, take to the THE RC12E S TRACK RECORD AT THE NATS track with Team Associated. In RC car competition, ROAR Nationals Expert Class 1:12 Scale Electrics from Southern California to the South of France, Production Stock Modified we've built a track record that includes the World 4cell No event MRP RC12E Championships and over a dozen 1978 No event RC12E RC12E ROAR National Titles. 6ce!l 4cell No event RC12E No event 1979 6cell RC12E RC12E RC12E

•4 cell cats run indoors. 6 cell cors outdoors Chorl shows all expert closs main events under official ROAR sanction since the RC12E was inlroduced

The Team builds that experience into every RC300 and RC12E competition car kit. And now the phenomenal RC12E is even available assembled, tuned and ready- to-win. So whether you're ready for the high-powered gas class or looking for the easy mainte­ nance and tight dicing of 1:12

electrics, we've got it's a gas! The new 1:8 scale Associated you covered. RC300 sweeps the 1979 ROAR Wmlernats In Florida... 1-2*31 So join forces The Nots-winning RC12E features die-cut fiberglass chassis, lightweight racing wheels and tires, tough glass-tilled nylon pillow blocks and complete, detailed instructions with the Team. We've got the magic if you've got including racing tips from Gene Husting and Roger Curtis. Approved for ROAR competition. the touch.

TEAM ASSOCIATED Associated Electric/1928 East Edinger/Santa Ana/CA/92705 (714) 547-4986 PLEASE WRITE FOR COMPLETE CATALOG AND DETAILED INFORMATION.

0 1979 Associated Electrics Documentation of Race Results available from ROAR their alignment. Cement the tubes to the ribs and spars with epoxy. DON’T NEW VOLTAGE BOOSTER ECONOMIZE ON THE EPOXY. Apply ATTENTION ALL ELECTRIC FLYERS!!!!!! large epoxy fillets around the tubes to NOW YOU CAN CHARGE ALL ASTRO insure that the stress in the tubes is FLIGHT ELECTRIC SYSTEMS FROM YOUR CAR BATTERY. THIS NEW ELECTRONIC transferred to the spar. Plug the tubes VOLTAGE BOOSTER MAKES 24 AND 30 with 1/4-inch sq. balsa forced in. Leave VOLTS FROM THE 12 VOLTS AVAILABLE four inches unplugged for the wing FROM YOUR CAR BATTERY. SIMPLY rods. Type E. PLUG RAPID CHARGER INTO BOOSTER 21) Epoxy the dihedral wires to the FOR HIGH VOLTS. upper and lower main spars. 22) Sheet the underside from L.E. to • Charges Astro 10,15,25 and 40 Light and compact. systems. the spar. Make sure the underside is as • Uses regular rapid charger. · Both lighter receptacle and banana smooth as you can make it. In spite of • Eliminates need for extra gel cell. plug output terminals. what you may have guessed, been told, or may seem logical, THE SMOOTHNESS Available Dec. 1 Stock No. 4025 List price $29.95 See your dealer or order direct. OF AN AIRFOIL BOTTOM IS MORE IMPORTANT THAN THE SMOOTHNESS NEW 12 VOLT POWER SUPPLY OF ITS TOP. ATTENTION ALL ELECTRIC AUTO FANS. 23) Sheet the top of bay one. Type A. ASTRO FLIGHT BRINGS YOU A POWER­ 24) Reinforce W1 with 1/32 plywood. FUL TWELVE VOLT POWER SUPPLY FOR Scissors cut the 1/32 ply nicely. Type D. INDOOR RACING. JUST PLUG INTO 25) Attach the tip block flush with the NEARBY 110 VOLT OUTLET AND GET 12 top of W11. Type D. VOLTS AT 4 AMPS FOR YOUR AUTO 26) Plane the bottom flush with the CHARGER. THIS FIRST CLASS HEAVY DUTY POWER SUPPLY WILL LAST FOR rib and radius the bottom surface. YEARS AND YET IT WEIGHS ONLY 4 27) Trim endstocontinueL.E.andT.E. POUNDS AND REPLACES HEAVY LEAD lines. • Banana plug output terminals ACID BATTERIES.. 28) Carve and/or sand top surface • Lighter receptacle output. from spar forward to continue top • Input 110 volts from wall receptacle. contour of W11. This will form the tip • Output 12 volts at 4 amps D.C. profile. 29) Rough carve the top rear surface Available Dec. 1 Stock No. 4024 Only $29.95 RSTRO FLIGHT inc to approximate shape (no material is 13377 Beach Ave.. Venice CA 90291 PIONEERS IN SILENT FLIGHT removed from the extreme tip [out­ board) from the spar back). 30) Wrap a piece of 60 or 80 grit center. Slip one through the lower sandpaper around a piece of broom Golden Eagle . .Continued from page33 notch in the double W3 ribs. handle, a dowel, a piece of pipe or what 10) Slip in (don't glue) the fiberglass have you, about 1-1/2 inches in diam­ made by hinging two particle board wing rod tubes and fit and glue in the shelves together, covered with Celotex eter, and sand in the convex shape. The spar webs. Type A. Remove the tubes. T.E. of the tip should be square and 1/16 ceiling tiles, is recommended. 11) Add the spruce spar top pieces. A wing with a curved bottom is a little inch thick. See View C on the plans. Type A. Set the prepared 5-inch wire 31) Sand the L.E. to the proper con­ more complicated to build than a flat- spar splice piece in place before putting bottom wing, so follow the steps in the tour. It’s a good idea to make a template. on the spruce. 32) Sand the top of main T.E. to order given below. 12) Put in the spruce turbulator spars 1) Cut the ribs out of 3/32 sheet. continue the rib contour and to achieve from W2 to the polyhedral break and the a square T.E. 1/16 inch thick. Don’t try to drill the holes in W1 and W2, balsa ones in the tip section. Try to get just cut square holes with an X-acto. 33) Cover the wing with Top Flite these exactly flush with the rib tops. Super MonoKote. Make sure the Mono- You're going to fill them up with epoxy Type A or C. anyway. Kote adheres to every rib and spar. My 13) Install the spoiler framework. designs are "stressed skin” and require 2) Taper the tip trailing edge stock. Type A. Pin down the lower half of the T.E. and the superior strength of MonoKote, 14) Install the 1/4 x 1/2 x 1/2-inch properly applied. Our tests have proven, the lower main spars. Pin down the L.E. spruce screw eye base in the root rib. 3) Glue rib W1 to the T.E. Lean the top to my satisfaction, that MonoKote is Type C or A. both the strongest and the lightest outward 6°. Do not glue ribs to the main 15) Install the plastic spoiler horn. spar or L.E. The L.E. and main spar are in covering commercially available. Type B. place to aid in rib alignment. Type A. 34) Cut out the spoiler. Reseal the 16) Route the 25-inch nylon spoiler covering to the spoiler and all around its 4) Laminate two W3 ribs together. cable housing, as shown, through the Type D. Cut notches for the dihedral frame. Hinge the spoiler with Scotch ribs. DO NOT CUT THE TUBE SHORTER. Magic Transparent Tape 3/4-inch wide. wires. Type C with soda. 5) Cut notches for the spoiler in four This acts as a return spring. DO N’T of the W3 ribs. 17) Cut a 1/4-inch square piece of tin LEAVE THE SPOILERS OPEN IN THE 6) Attach all the ribs to the T.E. Type C from a coffee can lid, or what have you, SUN. or A. and cement to the spoiler. Type E. STABILIZER 7) Complete theT.E.; i.e., add the top 18) Epoxy the magnet to the rib. Type Divide the 1/8-inch O.D. aluminum piece. Type A or C. When the glue is dry, E. Install the dacron cable and check out tubing into four 2-inch lengths and one remove the pins and block up the T.E. the action of the spoiler. Use Scotch 7/8-inch length. Using a knife, cut the 1/4 inch in the root section, tapering to Magic Transparent Tape as a hinge. five pieces by rolling the tubing with the 1/8 inch at W11. Block up all ribs 1/16 19) Remove the wing from the board knife (knife 90° to the tubing) back and inch just ahead of the main spar to allow and sheet the bottom of the first bay. forth until the tube severs. The 7/8-inch for sheeting. Type A or C. iece is the bellcrank axle. Ream the 8) Glue all ribs to the main sparand to Repeat these 19 steps on the other half ole in the bellcrank with a drill until the the L.E. Type A or C. of the wing. When finished, proceed as tube is just free in the bellcrank, not 9) Rougnen the 5-inch pieces of 1/16 follows: sloppy. Ream the 3/32 hole until thestab diameter steel wire (not music wire) with 20) Slip the fiberglass wing rod tubes wire is a light press fit. the edge of a flat file and bend 10° in the in position in both wing halves. Check 1) When building two stab halves.

68 R/C MODEL BUILDER As radio control modeling becomes application. Additionally, dual rate more sophisticated, complex, and switches, push button controls, and diversified, it's obvious that the radio on the seven channel transmitters. control equipment used must be oj non-linear or exponential controls on the highest possible quality and any two channels can be optionally reliability. It must be capable of ordered. meeting the challenges of new applications and not becoming The Series ’80 line introduces two obsolete overnight. new servos. The KPS-20 is a watertight, ball bearing output type The Series '80 five and seven channel that also features a low tension systems incorporate single or dual carbon button wiper design for added motor allows this servo to deliver in open gimbal stick transmitters, plug­ centering accuracy and longer pot excess o f 56 oz.-in. of thrust and a in transmitter frequency modules in life. A high powered version of this transit time of 4/10 of a second for both AM and FM frequencies, five servo, the KPS-20H is also available. 100z rotation. different receivers, five different It is intended fo r heavy duty battery packs, eight different types of applications such as fo r use in Your Kraft radio control system will servos, and two different types of quarter scale aircraft, cars, and not become obsolete. With the many switch harnesses to allow ordering a boats. A newly developed high power options available you can increase system h af best suits your servo amplifier coupled with a 6 ohm the use o f your system fo r any type o f modeling you want. Kraft Series '80 is designed fo r your future.

W rite fo r our free 1980 catalog. 4 5 0 IV. California Ave.. P.O. Box 1268 Vista. California 92083. (714) 724-7146 TIVX 910 3 2 2 1471

«'OHTY to length. 15) Locate and drill a 1/8-inch hole The Va scale power plant for the bellcrank axle in the left side At Last . . of the future, TODAY only. 16) Cut the slot for the rear stabilizer Introductory Price The "U ltim ate 2" pow er p la n t wire in the left side. features 2 Quadra's coupled Inline 17) With wax paper over the plans, which produce: ’695.00 pin down the left side and glue on the 1. Smooth running, little vibration. tail post. Type C or A. 2. Very high torque for large High • Over 6200 R.P.M. 18) Glue on the 1/4 X 9/32 center post Pitch Props. • On a 24-10 prop. and the fin base (slot on left side). C or A. • Over 5’/j H.P. 3. High R.P.M. for speed and DO NOT ATTACH THE 3/16 sq. OR THE outstanding performance. TOP RIB YET. 19) Glue on the right side. Type C or A. 20) Remove from board and squeeze the forward end of the sides together and glue in the 3/16 sq. separator. Type C or A. 21) Drill through the left side to locate the axle hole in the right side. Ditto for the slot. Use a drill press if you can, but make sure the hole is perpendicular. Complete the slots with knife, Dremel, 4. Added reliability. or file. 5. More than 2’/j times the power ot 22) Set in the bellcrank. It can’t be a single Quadra. done later. The Aeromarlne "Ultimate 2" power 23) Glue on the 3/32 x 1/4 top rib. plant comes completely assembled Type C or A. with gas lines, throttle linkages and 24) Glue on the 1/4 sq. leading edge. an installed Eastcratt Lectra Starter. Type C or A. Each power plant Is factory tested & 25) See Section A-A on the plans. Cut tuned betore shipment. the 1/4 X 1/2 stabilizer roots to fit the fin. Make the roots in one piece and, after Aeromarine Enterprises, Inc. gluing on, cut out the sections covering the slots. Glue on the roots one at a time, 7 0 9 Longboat Ave., Beachwood, N.J. 0 8 7 2 2 each time drilling through for the axle. Type C or A. considerable time can be saved by continue the rear edge line of the 26) Trim the stab roots so that the cutting two sets of parts at once. Cut a leading edge onto the plywood. overall width is 7/8 of an inch. Insert the notch 3/32 wide by 3/8 long in the 3) In a similar manner, continue the axle (7/8-inch tube) through one side, center of the aft end of each rib and the top line of the fiberglass fuselage. through the bellcrank and through the tip block so that the trailing edge piece 4) Use your steel straightedge and other side. Check that everything is will be in the center (top to bottom) of your X-acto knife and cut out the fin square and true; IF NOT, FIX IT! You the ribs. Cut all parts. side. Check its size and duplicate it. don't want to go to the flying field next 2) Clue the frame pieces together, 5) Cut the tail post from th e l/4 x9/32 weekend with a crooked airplane. (The including L.E., T.E., tip, root rib, braces balsa pieceand slot for the hinges. Note: difference between a good builder and and spar. Type A or C. The tail post is 1/4 inch front to back, a poor one is not that the good builder 3) Glue in all ribs. Type C or A. 9/32 side to side. doesn’t screw up, the difference is that 4) Remove the partially completed 6) Now is a prudent time to cut the the good builder fixes his screw-ups.) stab half from your building board. If 1/4 sq. rudder post and fit the hinges. 27) Shape the leading edge and the you used type C cement, apply the type 7) Cut the 1/8 x 9/32 ply fin base to stab roots’ leading edges. A fillets now. length. 28) Clue in the axle. Use Type C. 5) Drill a T/8-inch hole through the 8) Mark the extremities of the slot for RUDDER root rib and the next one for the 1/8- the bellcrank. 1) Pin down the rudder post pre­ inch aluminum tube. Clue in the 2-inch 9) Cut away 1/4 inch of the bottom of viously made. long tube, using type C with soda or type the bellcrank stiffeners so as to require 2) Cut all the 1/4 sq. pieces and glue A. only a narrow slot for it to pass through in place. Type C or A. 6) Go back NOW and repeat the first the fin base. 3) Fit the 3/32 x 5/8 trailing edge into five steps on the other stab half. 10) Cut the slot (or notch) in the fin slots in the 1/4 sq. top and bottom frame 7) Use the bellcrank to locate the base. Note: The notch will be off center. pieces. Type C or A. correct position for the rear tubes and It is 1-3/16 long x 1/8 wide, all on the 4) Install the ribs. Type A or C. drill for the tubes. Before you glue in the right side. 5) Install the corner brace. Type A rear tubes, set the two stab halves 11) It is wise to drill a new 1/16 dia. or C. together with the bellcrank in between. hole 1/4 inch up from the old 1/16 hole 6) When dry, sand to an eye-pleasing Use the bellcrank axle, otherwise the in the bellcrank to raise the elevator symmetrical airfoil shape. wire will be too small for the hole in the control rod clear of the rudder control FUSELAGE bellcrank. Glue in the tubes. Type A or C rod to prevent interaction. Cut 1/4 inch Note: Fiberglass fuselages and other with soda. off the bottom of the bellcrank arm. hardware for the Golden Eagle are 8) Sand the ribcontour toa symmetri­ 12) Cut the center 1/4 x 9/32 separ­ available from Craft-Air, 20115 Nordhoff cal shape (see Section B-B). ator. St., Chatsworth, CA 91311. Send SASE for FIN 13) Mark the place where the center a complete list and ordering information. 1) Pin the 1/32 X 5-1/2 inch square ply separator is to join with the fin base and 1) If you wish to tint your canopy, piece, grain horizontal, so that the back taper the width of the fin base forward of here’s how. Get a pot full of hot water edge is coincident with the trailing edge this point symmetrically to 3/16-inch (hot tap water is about 135°-140°, which of the tail post. wide. is ideal; boiling water will ruin your 2) Using a straightedge and a pencil, 14) Cut the 3/16 sq. forward separator canopy) and add one package of Rit dye

70 R/C MODEL BUILDER A WHOLE NEW LINE OF 5 S/ZES: 4". 4'/2‘ SMOOTH INFLATABLE B IG W H E E L S 5V2" AND 6". FOR THOSE OF YOU WHO ARE BUILDING ONE OF THOSE "BIG ONE'S" . . . THESE TIRES ARE FOR YOU! THE TWO PIECE HUBS BOLT TOGETHER AND ARE ATTACHED TO THE LANDING GEAR BY A DURA COL­ LAR HIDDEN BETWEEN THE HUB HALVES. OR ON THE OUTSIDE . . . WHATEVER YOU PREFER. HUB CAPS CAN BE USED IF DESIRED. THE WHEELS CAN BE INFLATED (OR DEFLATED) THRU A TINY VALVE IN THE SIDE OF THE TIRE TO THE PRESSURE YOU DESIRE. EXCELLENT FOR THOSE J3 CUBS. AERONCAS. SR. TELEMASTERS, MR. MULLIGANS, TWIN ENGINE CESS­ NAS, ETC. TRULY A REMARKABLE AND REALISTIC

LOOKING WHEEL. 400R 4 ” Dia. S7 .9 5 Pr 4 5 0 R . . 4-1/2" Dia. . S9 95 Pr A * 9 500R . . 5" Dia S11 .95 Pr. V 550R 5-1/2" Dia. $ 1 3 .9 5 Pr 600R . . . . 6 ” Dia. SI 5 .9 5 Pr RO E-Z K&B 40 MUFFLER CONNECTORS IDEAL FOR PLANES, FEATURING OUR NEW B O A TS , NYLON SNAP-ON A N D C AR S. — RETAINER DESIGNED ^ TO HOLD TIGHT ON ANY SIZE CONTROL ARM These special nylon re­ tainers hold tight, no matter what thickness ot control arm used, INCLUDES TWO and can be used over SPECIAL EXHAUST and over again. For permanent installations, PORT PLUGS. washers are included for peening-on. Accepts pushrod and flex-cable stock for fast and easy BLACK ANODIZED BODY. adjustments. PRESSURE FITTING INCLUDED.

CAT. NO. 121

D U - B R O NICKEL PLATED KWIK-GLO KWIK HINGE SLOTTER SOLDER LINKS O L O P L U G THE ONLY UNIVERSAL HINGE SLOTTING CONNECTOR TOOL FOR LARGE AND SMALL HINGES, THAT NOT ONLY CENTERS, BUT GUIDES FOR ENGINES YOUR BLADE FOR PERFECTLY ALIGNED .10 AND UP HINGE SLOTS EVERY TIME. PERFECT FOR HARD TO GET AT PLUGS One piece brass barrel snaps on to plug for positive KWIK-LINK® starting. The tried and 24-1/2" true spring steel long w ith Kwik-Link. Ideal attached battery for any control lugs. linkage. 2 each. No. 109 . . . . 75c 1

DU-BRO PRODUCTS, INC. wauconda, Illin o is U.S.A. 11) Decide exactly where your radio r must be put; namely, ASFAR FORWARD AS POSSIBLE. Install the servo rails. HOT OFF THE PRESS!! Type E. 12) Install the antenna tube. Anten­ NEW FIFTH EDITION nas that hang out not only look amateur­ ish, they add considerable drag. Type E or C with soda. 13) Install thetowhook base, 1/4 x 1/2 Radio Control X 2 spruce. Type E. 14) Towhook. There is only one cor­ rect place for a towhook. If you know Buyers Guide where that is, an adjustable towhook simply doesn’t make sense. The one on The Radio Control the plans makes the best towhook Buyers Guide is the money can buy. Screw it in and glue it in authoritative guide to place with epoxy. It’s cheap (about 15i radio control products. It each), but that’s not why it’s on the is the master catalog of plans; it’s there because I don’t know how to design a better one. Captured the industry with more releasable towhooks are all right in than 2,300 products pic­ theory, but you’re going to have to learn tured, described, & pric­ the proper technique to get a better ed. launch from one. I know a lot of pilots The new edition has who think captured towhooks are great, more than 200 pages but they can’t outlaunch me. I’ve met showing the products of one pilot who knew how to use one. I don’t! Do your own thing. more than 250 manufac­ 15) Fashion the control rods from 3/8- turers. inch sq. balsa, rounded. Make the wires Included are the latest as short as practical. Use the 1/16 wire in model cars, boats, air­ the front and the threaded control links craft, radio systems, aft. Slot the fuselage on the left side for tools, books and ac­ the control link to exit. Wrap the rods to cessories. The Radio the wires with thread and glue. Type B or Control Buyers Guide C with soda. 16) Install the servos and temporarily is indexed and cross- fit the fin and rudder. indexed for easy use. 17) When everything works smooth 'Information about, more than 2Ö00 This comprehensive and free, attach the fin to the fuselage .model aircraft, cars, boats, engines, catalog of the RC in­ . . . VERTICAL. Type E. radio, systems and accessories. x dustry is a must for every 18) Fit the wing halves to the fuselage. serious modeler! Make sure the wing incidence is correct Price: $7.75 and identical on both halves. Robart makes an incidence measuring tool that should make this an easy job. Drill 3/16- Please send m e. copies of the new 5th edition of the Radio Control Buyers Guide. (Enclosed is $8.25 for each copy ordered inch holes through the sides for the A t Better — $7.25 retail plus $1.00 postage & handling). incidence dowels. 19) Sand and paint your fuselage Hobby (white, I hope). Remember, the prettier Shops Name: a sailplane, the better it flies. or Direct 20) Fashion hooks from paper clips Street: and attach to the canopy tray back piece and the fuselage floor. Type E. Use two V. No. 10 rubber bands to hold the canopy City. State. ZIP: ______on. Return to: RC Buyers Guide. Clifton House. Clifton. VA 22024 FINAL ASSEMBLY AND TRIM 1) Cover the fin, rudder, stabilizer, (dark blue, dark green, maroon, etc.). inch poplar ply. Type A or E. and wings. Dip in your untrimmed canopy and 6) Paint the tray, or cover with self- 2) Glue the hinges to the tail post and check it frequently until it is the shade adhesive trim. (Top Flite’s new Sparkle- rudder post. you desire. Now, freeze in the color by Kote is a good choice for this.) 3) Make sure your control rods are rinsing in cold tap water. Dry it off 7) It's a good idea to tack-glue a positive. Sloppy controls are the prime promptly to prevent water spots. strong brace to the canopy tray while cause of rudder and stab flutter. 2) Sand the fuselage at the parting gluing on the canopy to make sure it 4) Cut oval-shaped holes in the fuse­ line with 100 grit, then 320 grit. Take care stays flat during the gluing. You've got lage sides for the screw eyes and the not to round off the flat area where the one shot with a canopy; if you glue it spoiler cable. Put a flat washer on a No. 2 fin attaches. wrong, it’s scrap. Attach the canopy to X 5/16 sheet metal screw and install in 3) Use a letter P drill bit to drill the base. Type B. the last hole in the spoiler servo arm. Slip through the wing tube indentations. 8) Put 1/8-inch wide striping tape the looped ends of the dacron lines over (Letter drills are almost as scarce as hen’s around the canopy to cover the edge of the screw and check that both spoilers teeth — you can use a 5/16-inch bit and a the tray. start to open simultaneously. little persuasion). 9) Cut the notch in the aft top of the 5) Initially set the trims to zero, using 4) Install the 2-1/2 inch fiberglass fuselage to accept the tail post. a 7/16-inch servo arm on both elevator tube and fill the indentation to flush. 10) Cut the slot in the top of the and rudder and a 9/16-inch arm on the Type E. Sand flush. fuselage to allow the bellcrank to work servo. The Golden Eagle is very respon­ 5) Fabricate the canopy tray from 1/8- freely. sive to the controls. 72 R/C MODEL BUILDER

Keep the speed up! This is a high­ three times that figure, making results speed airfoil. If you slow it down, as you useless for model work.) The ordinates may be used to doing with your Paragon to the Gott. 342 may be found in a 1961 l it e S p a r or Windrifter, the Golden Eagle will fall book by F.W. Riegels, Aerofoil Sections. out of the air. On the other hand, it will This a very thin section, about 5.5% CARBON FIBER SPARS do some cute tricks the aforementioned maximum, which may require sheeted cannot do. With sufficientcontrol move­ surfaces for stiffness. Bill Hartill has used ment, it will loop so tight that if you bat this section since 1951 for Nordics with your eyes, you’ll miss it. It can thermal good success. The calm-air times of his inverted and it will do the nicest outside low-aspect ratio Nordics have been loop you could want. impressive. The launch is almost vertical, but the MYSTERY MODEL OF THE MONTH speed must be kept up. This is a different This looks like a smaller version of the FlileSpar is the result ol space age develop­ breed of cat and you’re going to have to Crispy Critter, and dates back to the ments In liber technology Hi-Flight Model put in some stick time to get the most same era. The sway-backed fuselage Products now oilers a carbon liber-loam out of it, but the more familiar you laminate lor use in model building. These gave a high-thrust effect and should become with its characteristics, the spars compare favorably with hardwood in provide an easy identification for those more pleased you will become with its weight while offering highly superior strength of you with good reference files of old FliteSpars are available in all common sizes capabilities. · from your local hobby dealer or direct Irom magazines. If you think you know it, Hi-Flight Model Products Send S.A.S.E for send your guess to the RČMB office in information sheet F/F ...... Continued from page 61 Costa Mesa. Don’t send it to me! That 43225 Whittier Avenue/Hemet. California 92343 just delays things. First correct indenti- old ones,either. Maybe that’s why Clyde fication wins a one-year subscription. White of Minneapolis named his FAI 6) Balance your ship from the center design “ Slam Dunk” !) WHO’S GOT KEVLAR? of the spar at first. After you have flown it Kevlar is one of the new miracle a few times, move it back as far as you DARNED GOOD AIRFOIL: fabrics from Dupont with lots of possible can before the ship becomes unstable. Gottingen MVA 342 applications in model building. It’s This will vary from plane to plane and This section first came to my attention about 50% stronger than fiberglass cloth, especially from pilot to pilot. in an article by Alexander M. Lippisch in lighter and stiffer also. Kevlar can be 7) I believe you will be pleasantly the April and May 1950 issues of Air used in the same manner as fiberglass surprised at how well the Golden Eagle Trails. I wish I had a copy of the article cloth, for molding parts, reinforcing will penetrate, but for all-out speed (can anybody out there help?), since areas, etc. Walt Ghio used Kevlar to runs, ballast will be required. It takes at this is the first reference I can find in make the motor tubes for his fabulous least one pound of lead to make any American publications to the problem World Champs Wakefields. noticeable difference in the speed of a of low Reynolds number aerodynamics. The only problem with this new 980 sq. in. sailplane. You may wish to add Along with discussing the importance of miracle ingredient is where to get it. much more. Reynolds number to model airfoils, he Most places that have Kevlar have such a 8) It is not easy to find all the warps in presented some results of wind tunnel high minimum order, and the price is a semi-symmetrical airfoil wing. That tests done at low Reynolds number by naturally more per square yard than incidence gauge mentioned earlier the Prandtl Institute at Gottingen, dur­ glass cloth, that an individual would find should help, but it is imperative that the ing World War I. The Gottingen 342 gave the cost prohibitive to obtain a small wing have NO WARPS . . . no washout, one of the highest L/D ratios of those quantity to experiment with. ]im Thorn- either. If a sailplane is a turkey in the air tested. Before giving a blanket endorse­ berry did a bit of digging, however, and and/or does unpredictable maneuvers, ment to this airfoil, however, it should found an outfit that will sell Kevlar in the chances are 1000 to 1 that it's got an be realized that the turbulence level in quantities as small as one square yard. untrue, warped wing. FIX IT BEFORE the tunnel was not measured. (The If you’re interested in being the first YOU FLY IT THE FIRST TIME. Your first NACA tested the NACA 6409 and other kid on your block with a Kevlar motor impression of a new ship determines, in widely used airfoils at an alleged Rey­ tube, or FAI propeller, or chicken stick, large measure, how well you will fly it nolds number of 42.000 in 1940 or so, but write to Hi-Pro-Form Fabrics, Inc., 962 later. the turbulence factor was so high that Devon Drive, Newark, DE 19711, and ask FLYING the actual Reynolds number was almost for a price list. They have Kevlar in

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.

WRITE FOR FREE COLOR CATALOG DEALER INQUIRIES INVITED

BAVARIAN PRECISION PRODUCTS CO. • P 0 . Box 6. 22 East Avenue · New Canaan. Conn. 06840

74 R/C MODEL BUILDER MEET KRIS

Kris Clauss "Kris Kra«"

Son of Designer V.P. Bob Clauss Length: 19 and Beam : 6% For .049 Gas Engine or Production Assistant Sally Clauss Electric Motor

K it B -28 $19.95

□ Catalog of entire line of airplane control line model kits R C scale and Trainer kits, boat model kits, accessories, etc 50* enclosed Name □ "Secrets of Model Airplane Building". Including design, construction cover­ ing, finishing, flying, adjusting, control systems, etc. 50' enclosed. Address □ "Secrets of Control Line and Carrier Flying". Including preflight soloing, stunting. Carrier rules and regulations, earner flying hints and control line installation instructions 50* enclosed. No checks Only U S. money orders or currency accepted City ______— - "“” β -.______J 1979-1980 TOWER HOBBIES RADIO CONTROL CATALOG 0 FREE with your first order with Tower

FREE to active Tower customers

Absolutely the finest catalog Æ Y T O W E R h o b b i e s ^ available in RC * O »O* 77· CWAWOAIGN HU*OtS «ltJO ·00«37 7Μ· •OO JIM 11* taj mm 1979-1980 R/C CATALOG $2.50 0 358 illustrated pages

Super discounted prices i i*ooei.s v .iV , 0 Over 150 manufacturers to choose from 9° e0/] Mi» ·* Complete information

0 Easy to use indexes to help you find what you need quickly

0 Section introductions to answer your jpX .W E B R A ...... ------— MF G. CO. modeling questions um um mimiiis in< vfr D e v c o n 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 TOWER HOBBIES P.O.BOX 778 CHAMPAIGN, ILLINOIS 61820 217 - 384- 1010 CALL TOLL FREE: ILLINOIS TOLL FREE: * W 800-637-7686 800-252-3336 TOWER HOBBIES P.0. BOX 778 CHAMPAIGN, ILLINOIS 61820 217-384- 1010 CALL TOLL FREE: ILLINOIS TOLL FREE: Ο« w 800-637-7686 800-252-3336 THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTH OF THIS ISSUE. ONLY. AVAILABILITY. SPECIFICATIONS, AND PRICES ARE SUBJECT TO CHANGE WITHOUT NOTICE. I TOP FLITE 30% DREMEL MILLER No. 2017 Q UADRA 2 CU. IN. 29% SEALING IRON OFF No. 381 SPRAY SET ENGINE OFF MOTO- TOOL KIT

41% OFF This sealing iron makes finishing A heavy-duty variable speed kit your model fast & easy. Works complete with ball bearing con­ Set includes a precision built genu­ Develops 2 horsepower! An engine great with any covering. Features struction & 34 accessories. Handles ine piston-type air compressor, 12 suitable for large models with its teflon-coated shoe, adjustable tem­ everything from rough shaping to ft. air hose, 16G siphon type spray scale-like sound and realistic per­ perature. tapered edges, rounded intricate detail work with speed, gun & 14G air brush both with formance. Comes with muffler sides, & pointed tip. ease. & accuracy. open & fine spray nozzles. and mount. Runs on gasoline. R E T A IL NOW O N LY $15.98 R E T A IL NOW O N LY $46.98 R E T A IL NOW O N LY $48.98 R E T A IL NOW O N LY S99.98 $22.95 MBM313 $79.95 MBM153 $81.95 MBM228 $139.95 MBM260 K&B .40 RC ENGINE 38% DEVCON DREMEL 572 GOLDBERG 33% FALCON 56 MK II OFF No. 8011 OFF 5 MINUTE MOTO SH EPOXY IN ECONOMY THE MOST 9 0 Z . SIZE POPULAR RC ENGINE EVER MADE!! 44% OFF A reliable, rugged. & easy-to-fly Ideal for model making, hobbies, balsa trainer. Redesigned, it fea­ Features a unique design for high general bonding, & repairs. Comes This deluxe saw features a complete tures a longer, wider nose & a power; and an Irvine carburetor in twin plastic squeeze bottles for accessory set of blades, discs, etc. strengthened wing with aileron for excellent throttle response and big jobs. Packed in heavy-duty and flexible shaft. hardware. 56" span. Requires a .19- easy adjustment from a slow plastic pouch with instructions. R E T A IL NOW O N LY $62.98 .40 size engine & a 3 - 4 ch. radio. smooth idle to a roaring top speed. R E T A IL NOW O N LY $4.48 $109.95 MBM154 R E T A IL NOW O N LY $33.48 RETAIL NOW ONLY $44.98 $7.95 MBM151 $49.95 MBM392 $72.50 ______MBM200 LATRAX CORVETTE GOLDBERG 33% O RD ER FORM W/RADIO I W on a 1st & a SKYLARK 56 OFF T O W E R 2 n d In th e MK II P.O. Box 778. Champaign, III. 61820 Toll Free 800-637-7686 ■ ROAR NATS! , fAdd 0 217-384-1010 III. Toll Free 800-252-3336 8 A A pen CUSTOMER ceil NAME ______NUMBER______b a tte rie s to the radio, ADDRESS charge the car for 15 minutes, & you're ready Extensively improved construction, CITY STATE ZIP to racel strength, and flight performance! PRICE QTY STOCK DESCRIPTION AMOUNT THIS IS A FANTASTIC VALUE! 56” span. Requires a .30 -.40 size NUMBER EACH Comes with a powerful 2 ch. radio engine and a 4 ch. radio. This fun (w/whee! stick) already installed. 6 to fly balsa sport plane has pattern MBM cell nicad battery pack. & a quick capabilities. It makes a great charger. 16" length. Runs up to 30 low-wing trainer. mphl Electronic speed control. MBM R E T A IL NOW O N LY $124.98 R E T A IL NOW O N LY $35.48 $52.95 MBM181 $199.95 MBM212 MBM C O XTRADEW INDS 53% CRAFT-AIR 33% MBM FIELD BOX OFF SAILBOAT OFF

P LEA SE DO NOT W R ITE IN SUB TO TA L THE SPACES BELOW IL. RESIDENTS ADD 5% S A LE S TA X Made of hi-density polyethelene, POSTAGE, INSURANCE. S2.50 ready to use. lightweight, easy to AND HANDLING clean. & practically indestructible. This new ready-built RC sailboat has SPECIAL POSTAGE 22” long Not a kit. Features a re­ a 60" height, and a 35.9" length. movable accessory well on the top Requires a 2 ch. radio. Easily sailed C.O.D.'s ADD $2.50 & drawer in the side. using one servo for rudder control. R E T A IL NOW O N LY $19.98 RETAIL NOW ONLY S79.98 GRAND TOTAL $29.95 MBM148 $169.95 MBM427 THANK YOU!! P.O. BOX 778 CHAMPAIGN, ILLINOIS 61820

THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTH OF THIS ISSUE. ONLY. AVAILABILITY, SPECIFICATIONS, AND PRICES ARE SUBJECT TO CHANGE WITHOUT NOTICE.

HOW TO ORDER HOW TO ORDER HOW TO ORDER HOW TO ORDER HOW TO ORDER

BY MAIL ORDER BY TOLL FREE PHONES When you place your order over the phone, we will ship it to you C.O .D.. Write down all of the items that you want along with their special stock and you pay for it when it's delivered to your door. Add $2.50 for postage, numbers and prices, on the Tower order form. Total them up (Illinois handling, and full insurance, and $2.50 for the C.O.D. charge (Illinois resi­ residents add 5% sales tax) and add $2.50 for postage, handling, and full dents add 5% sales tax). When you phone in your order, please have the insurance, to obtain the grand total. Obtain a money order, certified check, stock numbers written down ready to give to the order taker. bank check, or write a personal check for the grand total amount (personal Continental United States: Illinois Residents Only: checks may be delayed to allow for clearance). Foreign orders add $10.00 800 - 637 - 7686 800 - 252 - 3336 (excess will be refunded with order). Date of postmark determines special The "800" WATS lines are open weekdays from 9:00 A.M. to 5:00 P.M., period eligibility. Send your order along with full payment to: TOWER Monday through Thursday evenings 5:00 P.M. to 9:00 P.M., and 10:00 A. HOBBIES, P.O. BOX 778, CHAMPAIGN. ILLINOIS 61820. M. to 5:00 P.M. on Saturdays (C .S.T.). Closed Friday evenings and Sunday. STOCK NOW STOCK NOW NUMBER DESCRIPTION RETAIL ONLY NUMBER DESCRIPTION RETAIL ONLY $ 2 5 .9 8 M B M 1 0 1 A ce H ig h G lid e r ...... $ 1 9 .9 5 $ 1 2 .9 8 M B M 1 71 F o x .3 6 R C ...... $ 3 9 .9 5 4 6 .9 8 MBM417 Air Capital RTF F B-100 ...... 1 4 9 .9 5 1 3 9 .9 8 M B M 4 7 8 Fox .40 BB Schneurle w/M K-X Carb. 7 4 .9 5 4 9 .9 8 MBM458 Airtronics Warlock .40 ...... 6 4 .9 5 4 6 .9 8 M B M 175 Fox 60 RC Eagle w/New Carb .... 7 9 .9 5 74 95 5 2 .4 8 M B M 177 Fox 1.2 Cubic Inch T w in ...... 2 5 0 .0 0 1 7 4 .9 8 M B M 1 0 5 A ir tr o n ic s A q u il a ...... 3 3 .4 8 4 9 .9 5 3 4 .9 8 M B M 3 9 2 Goldberg Falcon 56 MK II ...... 4 9 .9 5 M8M106 Airtronics Olympic 11...... 3 5 .4 8 MBM107 A Justo Jig Wing & Fuse Jig . . 5 9 .9 5 4 3 .9 8 M B M 181 Goldberg Skylark 56 MK I I ...... 5 2 .9 5 4 3 .4 8 MBM411 Associated RC 300 Car Kit . . . . 190 0 0 1 1 9 .9 8 M B M 182 Goldberg Skylane 6 2 ...... 6 4 .9 5 4 6 .8 8 MBM1 13 Associated 6 Cell Car Kit No. 3012. 1 0 2 .0 0 6 9 98 M B M 183 Goldberg Senior F alcon ...... 6 9 .9 5 3 3 .5 8 MBM412 Associated 6 Cell Asmb. No 3024 1 1 9 .5 0 8 2 .9 8 M B M 4 0 3 Goldberg P6E Curtiss Hawk Bipe . . . 4 7 .9 5 1 1 .8 8 MBM114 Badger 200 1 Air Brush Kit 3 5 0 0 2 4 .4 8 M B M 184 Goldberg Handi-Tote ...... 1 7 .9 5 MBM115 Badger 200 3 Deluxe K it ...... 4 5 0 0 2 9 .9 8 M B M 4 6 4 Goldberg Jet Adhesive % oz. No. 386 2 .9 5 1 .88 MBM116 Badger 180 1 Compressor ...... 8 5 .0 0 6 3 .7 8 M B M 185 HB .12 RC BB w /M u ffle r ...... 4 2 .0 0 2 9 .3 8 MBM460 Bolink 1092 6-Cell Performance Car 1 3 0 .0 0 8 4 .4 8 M B M 186 HB .15 RC BB w /M u ffle r ...... 4 5 .5 0 3 1 .8 8 3 9 .9 8 MBM459 Bolink 1352 Econo Perfor. Car Kit. 9 9 .9 5 6 9 .9 8 M B M 187 HB .25 RC BB w /M u ffle r ...... 5 9 .0 0 4 9 .9 8 M B M 3 9 6 B rid i D e c e p tio n ...... 9 9 .9 5 7 4 .9 8 M B M 188 H B 4 0 RC B B ...... 7 3 .0 0 5 4 .9 8 MBM121 Bridi Sun Fli 4 20 ...... 3 2 .2 5 2 2 .5 8 M B M 189 H B .5 0 RC B B ...... 8 0 .5 0 5 9 .9 8 MBM123 Bridi RCM Trainer 40 ...... 5 8 .9 5 3 9 .9 8 M B M 190 HB 40 RC BB PDP ...... 8 9 .0 0 8 6 .9 8 MBM125 Bridi Dirty Birdy 40 wood . . 6 4 .7 5 4 5 .2 8 M B M 191 H B .61 RC B B P D P ...... 1 2 5 .5 0 2 .9 8 M B M 1 2 6 B rid i R C M T ra in e r 6 0 ...... 6 7 .9 5 4 7 .5 8 M B M 192 Hobbypoxy Formula 2 Epoxy 8 oz. 4 .2 5 1 4 .9 8 MBM130 Bridi UFO - fiberglass ...... 1 4 2 .9 5 1 0 2 .9 8 M B M 4 6 5 H ig le y 's S m o k e S y s te m ...... 1 9 .9 5 2 .7 8 MBM454 Super Coverite 47” X 15'white . . 3 8 .8 4 2 7 .9 8 M B M 193 Hot Stuff Adhesive - ’/> o z ...... 3 .9 5 5 5 .9 8 MBM132 Coverite Balsarite 8 o z ...... 3 .5 0 2 .5 8 M B M 197 Je m co F 4 U -1 A C o r s a ir ...... 7 9 .9 5 4 9 .9 8 MBM400 Cox Hydroblaster w/.049 & Radio . 1 1 0 .9 5 7 4 .9 8 M B M 198 Jensen Das U g ly S t i c k ...... 6 9 .5 0 1 2 1 9 5 6 9 9 8 M B M 4 2 4 K & B .1 9 R C ...... 6 0 .0 0 3 5 .9 8 MBM137 Cox RTF Cub w/Engine & Radio . . 6 9 9 8 MBM138 Cox RTF Cessna Centurion . . 7 9 .9 5 4 8 9 8 M B M 2 0 5 K&B .21 Outboard ...... 1 1 0 .0 0 4 9 .9 8 MBM418 Cox RTF Piper Arrow ...... 74 95 5 2 .4 8 M B M 4 0 6 K&B .21 RC Schneurle w/M uffler . . 7 7 .0 0 9 9 .9 5 6 2 .9 8 M B M 2 0 0 K&B 40 RC Engine ...... 7 2 .5 0 4 4 .9 8 MBM139 Cox RTF Sportavia Trainer 6 2 .9 8 MBM461 Cox Electric Sportavia ...... 1 3 9 9 5 9 9 .9 8 M B M 2 0 1 K&B 40 RC Pressurized ...... 1 0 5 .0 0 1 6 9 .9 5 7 9 .9 8 M B M 4 3 8 K&B .40 RC RE Schneurle w /M uff. . 1 1 0 .0 0 6 9 .9 8 M B M 4 2 7 C ox T ra d e w in d s S a ilb o a t...... 4 9 .9 8 2 7 .9 5 1 4.9 8 M B M 2 0 7 K&B .40 RC Sport M arine ...... 8 2 .5 0 MBM134 Cox Tee Dee .049 Engine ...... 7 9 .9 8 19 95 13.98 M B M 199 K&B .45 Schneurle Marine 9080 . . . 1 2 5 .0 0 MBM462 Cox RC Bee .049 w/M uffler ...... 9 9 .9 8 2 7 .9 5 1 6.9 8 M B M 2 0 2 K&B .45 RC Snl. w/Pump 9100. . . . 1 6 0 .0 0 MBM387 Cox Tee Dee .051 Engine . . 5 9 9 8 2 9 .9 5 19.98 M B M 2 0 3 K & B .61 RC w / M u f f le r ...... 9 6 .5 0 MBM135 Cox Tee Dee .09 Engine ...... 7 6 .9 8 MBM146 Craft-Air Butterfly 11...... 4 9 .9 5 3 2 .4 8 M B M 2 0 4 K&B .61 RC w/M uffler & Pump . . . 1 2 5 .0 0 8 4 .9 8 M B M 142 C ra ft A ir D r ifte r I I ...... 19 9 5 1 3.9 8 M B M 4 5 6 Kraft .61 RC Schneurle w /M uffler . . 9 9 .9 5 K r a ft R T F E le c tric C a r d in a l...... 9 9 .9 5 5 9 .9 8 MBM423 Craft Air Piece O' Cake ...... 2 4 .9 5 1 7 .4 8 M B M 4 1 9 M B M 4 2 0 Kraft Electric M otorcycle ...... 7 9 .9 5 5 9 .9 8 MBM145 Craft Air Viking MK I Sailplane. . . 7 9 9 5 4 9 .9 8 Kraft Motorcycle with R adio ...... 2 4 9 .9 5 1 6 9 .9 8 MBM409 Craft-Air Upstart (3/16 inch) .... 1 7 .9 5 1 2 .5 8 M B M 4 6 6 M B M 2 0 9 Lanier Transit ...... 4 7 .9 5 2 9 .9 8 MBM 141 Craft Air H. D. H i-Start ...... 4 9 .9 5 3 2 .9 8 M B M 2 1 0 Lanier Caprice ...... 7 4 .9 5 4 6 .9 8 MBM 148 Craft Air Field Box ...... 2 9 9 5 1 9.9 8 M B M 4 0 7 L a n ie r C o m e t I I ...... 6 4 .9 5 4 0 .9 8 M B M 149 D A E S eries IV P o w e r P a n e l...... 3 8 .9 5 2 4 .9 8 M B M 4 5 3 L a n ie r J e s te r...... 7 4 .9 5 4 6 .9 8 MBM151 Devcon 5 min. Epoxy 9 oz ...... 7 .9 5 4 4 8 M B M 2 1 2 Latrax Corvette w/Radio ...... 1 9 9 .9 5 1 2 4 .9 8 MBM416 Dremel No. 730 Disc Belt Sander . 9 9 .9 5 5 9 98 M B M 2 1 3 Leisure 1/8 Dune Buggy ...... 1 9 9 .9 5 1 5 9 .9 8 MBM 1 53 Dremel 381 Moto Tool Kit . . 7 9 .9 5 4 6 .9 8 M B M 4 3 2 M a rk 's B ird o f T im e G l i d e r ...... 5 9 .9 5 3 8 9 8 MBM 154 Dremel 572 Deluxe Moto Shop . . . 1 0 9 .9 5 6 2 9 8 M B M 2 1 5 Mark's Models Bushwacker w/Acces . 5 2 .9 5 3 3 .9 8 MBM155 Dremel 580 Table Saw ...... 1 09 9 5 6 2 .9 8 M B M 2 1 4 Mark's Models Wanderer 7 2 " ...... 2 3 .9 5 1 4 .9 8 MBM158 Dubro Kwik Fill Fuel Pump ...... 1 0.9 8 6 .9 8 M B M 217 MEN Trainer .15 .25 ...... 3 6 .9 5 2 7 .6 8 MBM 163 Dumas Atlas Van Lines U 1 ...... 6 0 .0 0 3 8 .9 8 M B M 2 1 8 Microflame 4400 Dlx. Welding K it . . 4 1 .9 5 2 9 9 8 MBM 162 Dumas Big Swamp Buggy ...... 4 2 .0 0 2 5 .9 8 M B M 2 2 0 Midwest RK-40 Axiflo Fan K it .... 4 9 .9 5 3 4 .2 8 MBM 166 Dumas Hot Shot 21" - glass ...... 8 0 .0 0 4 9 .9 8 M B M 221 Midwest Little S tik ...... 3 5 .9 5 2 3 .3 8 MBM165 Dumas Hot Shot 24" Tunnelhull . . 3 7 .0 0 2 2 .9 8 M B M 2 2 2 M id w e s t C a rd in a l A R F ...... 3 8 .9 5 2 4 .9 8 M B M 4 4 7 D um a s D V 10 g la s s ...... 2 5 .0 0 1 6 .9 8 M B M 2 2 3 Midwest Super C hipm unk ...... 3 9 .9 5 2 5 .9 8 MBM 164 Dumas Competition DV60 glass 1 15 0 0 6 9 .9 8 M B M 2 24 Midwest Sweet S tik ...... 4 7 .9 5 2 8 .9 8 M B M 4 0 1 D um as D a u n tle s s ...... 8 4 0 0 4 9 .9 8 M B M 2 2 6 M id w e s t A t t a c k e r ...... 4 7 .9 5 2 9 9 8 MBM448 Dumas American Enterprise ...... 8 5 .0 0 4 9 .9 8 M B M 2 2 8 Miller No. 2017 Spray S e t ...... 8 1 .9 5 4 8 .9 8 MBM463 Dumas Huson 36 Sailboat ...... 1 9 5 .0 0 1 1 4 .9 8 Monokote Reg. and Trans. Colors. . . 9 .9 0 5 .9 8 6 2 .0 0 4 2 9 8 MBM429 Dumas Sail Control U nit ...... Monokote Metallic C olors ...... 1 1 .7 0 6 .9 8 MBM167 Edson Adjustable Motor Mount. . . 6 .9 5 5 .5 8 M B M 2 3 0 MRC RTF Cessna w/Enya .35 RC . . 4 4 9 .9 5 2 7 7 .4 8 E n ya E n g in e s ...... Call For Low Prices M B M 2 3 1 MRC RTF Cherokee w/Enya .40 RC . 4 9 9 .9 5 3 1 4 .9 8 MBM168 Fox .15 RC Schneurle ...... 3 7 .9 5 1 9 9 8 M B M 2 2 9 MRC RTF Hawk Trainer w/Enya .15. 9 9 .9 5 7 4 .9 8 MBM169 Fox .19 RC Engine ...... 3 6 .9 5 2 2 .9 8 M B M 2 37 MRC 1/12 Scale Leopard Tank .... 1 9 9 .9 8 1 3 9 9 8 MBM170 Fox .25 RC Engine ...... 3 6 .9 5 22 9 8 M B M 4 4 2 MRC Lamborghini Countach LP500S 7 7 .9 8 4 5 .9 8 MBM388 Fox 35 U/C 2 6 .9 5 1 7.9 8 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 MONTH OF THIS ISSUE. ONLY. AVAILABILITY. SPECIFICATIONS, AND PRICES ARE SUBJECT TO CHANGE WITHOUT NOTICE.

STOCK NOW n u m b e r DESCRIPTION RETAIL ONLY

M B M 4 4 3 MRC Martini Porsche 936 Turbo . S 6 8 .9 8 S 3 9 .9 8 NOW STOCK M B M 4 7 9 O.S. Max .40 FSR RC w/M uffler . . . 9 9 .9 5 6 9 .9 8 MODEL ONLY NUMBER M B M 1 2 7 Bridi Super Kaos 6 0 ...... 7 4 .9 5 5 2 .4 8 M B M 4 2 1 Bud Nosen P-51 8 .5 ' ...... 1 6 9 .9 5 1 1 9 .9 8 M B M 4 4 9 O.S. Max .15 RC w /M uffler ...... 4 5 .9 5 2 9 .9 8 TOWER HOBBIES ^ TOWER HOBBIES TOWER HOBBIES 4 6 .9 5 3 1 .9 8 M B M 4 5 5 O.S. Max .20 RC w/M uffler .... M B M 397 Μ B M 469 O.S. Max 45 FSR RC w/Muffler . . 1 1 9 .9 5 8 3 .9 8 6 Channel w/2 KPS-14II Servos ...... S 169.95 MBM 4 5 I O S. Max 90 FSR RC w/Muffler . . . 2 2 5 .0 0 1 5 7 .4 8 6 Channel w/3 KPS-14II Servos ...... 194.95 M B M 398 1 10.00 4 9 .9 8 MBM 4 7 O Peerless 1 /1 2 E le c tric P o rs c h e ...... 6 Channel w/4 KPS-14II Servos ...... 21 9.95 M B M 33 9 MBM 2 5 I Pica Cessna 182 ...... 9 9 .9 5 6 6 .9 8 MBM 253 Pica T 28B ...... 8 9 9 5 5 9 .9 8 6 Channel w/4 KPS-15II Servos ...... 22 9.95 M B M 34 0 MBM 255 Pica W a c o ...... 8 9 .9 5 5 9 .9 8 T ow e r KPS-14II S e rv o ...... 25.00 M B M 3 9 9 Pica Duelist 2/40 8 9 .9 5 5 9 .9 8 M B M 2 5 6 M B M 4 8 0 M B M 2 6 0 Quadra 2 Cu. In. Aircraft Engine . . . 139 9 5 9 9 .9 8 T ow e r KPS-1511 S e rv o ...... 25.00 M B M 2 6 2 Robert Incidence M e te r ...... 1 5 .9 5 1 0.9 8 THIS SALE IS NOT RETROACTIVE MBM 4 7 I R o b e rt S u p er P u m pe r M K I V ...... 2 4 .9 5 1 7.98 M B M 2 6 4 Robert Auto Mix . . . . 9 .9 5 7 .4 8 M B M 2 6 5 R h o m 2 G ear M a in s ...... 8 7 .0 0 5 6 .6 8 KRAFT KRAFT KRAFT KRAFT KRAFT KRAFT M B M 2 6 6 Rhom 3 Gear Firewall ...... 125 00 7 9 .9 8 KP-2AW (Wheel) w/14IIA's. . . $149.95 $1 01 .9 8 M BM 344 M B M 2 6 7 Rhom 3 Gear Flat Mount...... 1 2 5 .0 0 7 9 .9 8 M B M 2 6 3 R o y a l P h o to c e ll T a c h o m e t e r ...... 3 9 .9 5 3 3 .9 8 K P-2 AW (Wheel) w /15IIA's. . . 155.95 105.98 M B M 3 4 5 MBM 272 S & O B a tte ry T e s te r...... 2 9 .9 5 19.98 KP-2A (2 Stick) w/14IIA's . . . 149.95 101.98 M BM 346 MBM 4 15 7 7 .5 0 5 4 .9 8 S ig B e e c h c ra ft B o n a n z a ...... 105.98 M B M 34 7 MBM 275 Sig Piper J 3 C u p ...... 4 9 .9 5 3 5 .9 8 KP-2A (2 Stick) w/15IIA's . . . 155.95 M B M 2 7 6 S ig K a d e t T r a in e r ...... 4 3 .9 5 3 1 .6 8 KP-2AS (1 Stick) w/14IIA's . . 149.95 101.98 M BM 348 M B M ? 7 9 S ig K a v a lie r ...... 4 9 .9 5 3 5 .9 8 KP-3AS w/KPS-14IIA's ...... 164.95 109.98 M B M 4 3 3 MBM 277 Sig < ou g a r M K 11 ...... 5 2 .5 0 3 7 .7 8 M B M 2 7 8 Sig Smith M iniplane ...... 5 9 .9 5 4 2 .9 8 KP-4A w/KPS-14IIA's ...... 32 9.95 209.98 M B M 3 5 0 MBM 304 Sonictromcs No. 1250 12 v. Fuel Pump 1 5.9 5 1 1.9 8 KP-4A w/KPS-15IIA's ...... 341.95 218.98 M B M 351 4 3 .9 5 3 2 .9 8 MBM 431 Spickler Quickie 500 M B M 3 5 2 M B M 2 9 0 Stafford B 24D Liberator ...... 1 9 9 .9 5 1 3 9 .9 8 KP-6A w/KPS-14IIA's ...... 35 9.95 229.98 MBM 291 Stafford Twin Comanche balsa 1 4 9 .9 5 104 98 KP-6A w/KPS-15IIA's ...... 371.95 237.98 M BM 353 2 1 .9 5 14.98 M B M 2 9 3 Sterling Puddle Jumper...... 299.98 M BM 354 MBM 294 S te rlin g P u d dle J u m p e r M K I I ...... 4 7 .9 5 3 0 .9 8 KP-5C w/14ll's or 15ll's ...... 41 4 .9 5 M B M 2 9 5 Sterling Fledgling ...... 4 8 .9 5 2 9 .9 8 KP-5CS w/14ll's or 15ll's ____ 424.95 30 5.98 M BM 355 M B M 2 9 6 Sterling ’ΛΑ Corsair ...... 3 5 .9 5 2 2 .9 8 549.95 389.98 M B M 3 5 6 M B M 3 0 5 Sullivan Electric Starter . . . . 3 8 .9 5 2 4 .9 8 KP-7C w /14ll's or 1511's...... M B M 3 0 6 Sullivan Deluxe Starter ...... 4 1 .9 5 2 7 .2 8 KP-7CS w/1411's or 1511's ____ 559.95 39 9.98 M B M 3 5 7 M B M 4 7 2 S u lliv a n 24 v. E le c tric S t a r t e r ...... 4 9 .9 5 3 3 .4 8 KPS-14II S e rv o ...... 44.95 32.98 M BM 358 MBM 452 Supertigre X 11 RC Schneurle w/M uff 4 5 .9 5 3 1 .9 8 M B M 3 0 7 S u re flite S k y la n e 1 8 2 ...... 4 4 .9 5 2 8 .9 8 KPS-1511 S e rv o ...... 44 .95 32.98 M BM 359 M B M 3 0 8 Sureflite All Foam J 3 C u b ...... 4 4 .9 5 2 8 .9 8 KPS-18 Servo (Super Mini) . . . 59.95 47.98 M BM 360 M B M 3 1 0 S u re flite S p itfir e f o a m ...... 4 4 .9 5 2 8 .9 8 27.98 M B M 361 M B M 2 5 9 L - R. T a y lo r P o w e r Pacer 9 .6 v ...... 5 9 .9 5 4 6 .9 8 K P S -1 4IIA S ervo...... 39.95 M B M 3 9 0 L R. T a y lo r M u lti C h a rq e r...... 2 4 .9 5 1 9 .9 8 KPS-1RIIA Servo ... 42.95 29.98 M B M 3 6 2 M B M 4 0 8 L.R. Taylor Super Power Panel .... 8 9 .9 5 6 9 .9 8 M B M 4 2 5 Top Flite Contender 40 ...... 5 4 .9 5 3 5 .9 8 M B M 3 1 6 T o p F lite C o n te n d e r 6 0 ...... 6 2 .9 5 3 9 .9 8 FUTABA FUTABA FUTABA FUTABA FUTABA Μ BM 3 2 0 Top Flite F4U 1 A Corsair ...... 9 9 .9 5 5 9 .9 8 109.95 69.98 M B M 36 3 M B M 4 7 3 Top Flite F8 F B e a rc a t...... 9 9 .9 5 6 4 .9 8 F P -2G S ...... M B M 3 1 5 Top Flite Freshman Trainer ...... 5 2 .9 5 3 4 .9 8 FP-2F w /S -7 's ...... 149.95 98.98 M BM 364 M B M 3 1 4 Top Flite Heat Gun ...... 3 2 .9 5 2 1 .9 8 FP-2F w/S-22's or 23's ...... 134.95 89.98 M B M 36 5 M B M 3 1 3 Top Flite Sealing Iro n ...... 2 2 .9 5 1 5.98 M B M 3 6 6 M B M 4 1 3 Top Flite Trim Seal Tool...... 1 5 .9 5 1 1 .9 8 FP-2E w /S -7 's...... 149.95 98.98 M B M 3 1 1 Top Flite 10 X 6 (6 ) Super Maple . 9 .0 0 6 .2 8 FP-3S w/S-23's ...... 144.95 94.98 M B M 36 8 M B M 3 2 1 Tower RC Long Plugs 6 Plugs .... 8 .9 4 4 .9 8 169.95 109.98 M B M 3 6 9 M B M 3 2 2 Tower 12 v. Starter Battery · wet 2 5 .9 5 1 2.9 8 FP-3S w/S-20's ...... M B M 3 2 3 Tower 12 v. Battery Charger...... 1 3 .9 5 6 .9 8 FP-3FN w/S-22's or 23's ...... 219.95 139.98 M B M 38 3 MBM 325 Tower Rubber Bands ’4 lb. No. 64 1 .5 0 .98 FP-4FN w /S -2 3 's ...... 289.95 179.98 M B M 3 7 0 MBM 4 4 O W e b ra .91 RC S c h n e u rle ...... 2 6 8 .3 5 1 4 9 .9 8 MBM 334 X Acto No. 5087 Knife & Tool Chest 3 4 .9 5 2 2 .9 8 FP-4FN w /S -1 6 's...... 319.95 199.98 M B M 371 MBM 337 Zinger Props 10x66 e a c h ...... 8 .4 0 5-88 FP-5FN w /S -2 3 's ...... 319.95 199.98 M B M 37 2 MBM 333 Zinger Props 11 x 7 - 6 e a c h ...... 9 .6 0 6.68 359.95 219.98 M B M 37 3 MBM 476 Goldberg 30 Second Super Jet - Vi o z. 3 .9 5 2 .9 8 FP-5FN w /S -1 6 's...... Μ B M 422 MRC Lamborghini Countach Special . 8 4 .9 5 6 3 .6 8 FP-6FN w /S -2 3 's...... 33 9.95 204.98 M B M 37 4 MBM 441 MRC Lamborghini Cheetah ...... 8 9 .9 8 5 9 .9 8 36 9.95 229.98 M B M 37 5 M B M 4 4 4 Bud Nosen Big S tic k ...... 1 2 9 .9 5 9 7 .4 8 FP-6FN w /S -1 6 's ...... MBM 4 7 7 Jemco Fun Scale M ustang ...... 4 4 .9 5 3 3 .6 8 S-7 S e rv o ...... 39.95 29.98 M B M 3 7 9 M B M 2 4 0 OPS .65 RC Marine w/Tuned Pipe . . 2 4 4 .0 0 1 7 9 .9 8 S-16 S e rv o ...... 39.95 29.98 M B M 3 7 8 M B M 2 6 3 Robart Super Pumper Mark III . . . . 1 7 .9 5 1 1.9 8 39.95 29.98 M B M 43 7 MBM 309 Sureflite MA J-3 foam ...... 3 4 .9 5 2 2 .6 8 S-20 Servo (M in i) ...... MBM 2O6 K&B .21 Inboard Marine w/M uffler . 7 9 .0 0 4 9 .9 8 S-23 S e rv o ...... 29.95 22.48 M B M 37 7

MRC MRC MRC MRC Remember, these are only a few of the several thousand different MRC MRC MRC MRC 99.98 72.98 M B M 47 4 items that Tower Hobbies stocks. If you need an item that does No. 2000 2 Ch. w/MR-12's . . . 249.95 169.98 M B M 47 5 n o t appear in this issue, give us a call to see if we have it. The No. 4000 4 Ch. w/MR-12's . - . chances are good that we do. By all means compare our prices SANWA SANWA before you buy elsewhere; you'll be dollars ahead. SANWA SANWA SANWA No. 80 20 2 C h an nel...... 99.95 64.98 M B M 38 0 sand away the corner. This will simplify drilling without affecting the overall shape of the block. A Full Blown Competition Radio The next step is to take a piece of 1/32 plywood and draw perpendicular lines at a Sport Radio Price! on it. Using the centerofthesetwolines, I will draw a circle, the diameter dictated by the front of theengine cowl. Another Inexpensive is the key word for ACE’S new line of R/C kits called the Silver Series. This line offers a circle is drawn about 1/4 smaller than unique combination of value and a wide range of versatility not found on today’s R/C market until now. How do we do it? By cutting out one of the biggest costs. Labor! We furnish you the kit, and you the first one. making concentric circles. furnish the labor. These circles are cut out using a circle This allows us to give you a top-quality product at an inexpensive price, comparable to the $800 radios. cutter on the drill press. When finished, I Here are some of its features; end up with a neat ring with four marks on it. This plywood ring is then glued SERVO REVERSAL SWITCHES-With ju « a flip o f a twitch, the aervo travel direction on ☆ each of the four primary channel* can be reverted. onto the front of the cowl block, using INDEPENDENT THROW ADJUST-On aD channel* the amount o f tervo travel can be con­ its marks to line up with the perpendicu­ ☆ trolled independently lar lines previously drawn on the block. FIFTH CHANNEL AD JUST-Servo postion when the tetract twitch it either tn the “Up” ot By using Super Jet, you don’t have to ☆ “D own" pontion is independently adjuttable wait until the glue dries. Next, I tack- TRIM LOCATION VARIABLES-The location of the trim* u at the butlder't dbcretion ao glue the block onto the fuselage using ☆ you can have »andard trim , c ro w d trim, or a combination of the two. the Super Jet glue near the center of the φ TRIM AUTHORITY PROGRAMMABIUTY-By chanpng “plup-in" fixed remtori. the amount of tervo excunion when the trim* are moved it programmable block, keeping the top cylinder perfect­

^ DUAL RATE-SwitchetRATE -Swi and adputment pot» ate fumtthed to provide DUAL RATE on up ly aligned. I prefer to tack-glue away to three channels from the edge so that when removing

EXPONENTIAL RATEF OPTION-Thit plu*-m option provide* non-linear lervo travel in ce- the cowl later, if the balsa splits, it won’t latron to stick movement on up to three channel* (SÍ7.9S) leave a ragged edge. Once the block has ELECTRONIC MIXER OPTION-WuhOPTION-With iht*this pluginplug-in module anytn) two function* can be mixed dried, it is shaped and sanded as re­ together either uni-directlonally or bi-directionally. (SI I.9S) quired. You will note that the transition PROGRAMMABLE PUSH BUTTON OPTION-In flight adjuttable from the shape at the firewall to the ☆ pre-programmed control surface movement may be obtained by push In* a button. (S8.9S) front of the cowl is greatly simplified due to the plywood ring. At this point, the THE SILVER SEVEN block will not be hollowed out; this will come later. $284.95! Fitting the cylinders to the block is the Full ni-cd system kit with next step. Care is required here. By using receiver and four servos. the plan, you have to determine how much each cylinder sticks out above the cowl block.The WilliamsBros.cylinders I used to simulate the Kinner were the Wright J-5’s turned around. These cylin­ ders have a taper to them, so that the holes previously drilled have to be Check with your dealer, writ#, or call reamed a little to accommodate them. I details. start with the top cylinder and work Complete Catalog: $1.00 (add H ver S e rie s $.50 for 1st C la · Mail return). around. By using a pair of dividers, I measure from the center of the block to the top of the cylinders. This assures me that each cylinder is the proper height from the thrust line. (Now you know l / C , In c T ] why the block wasn’t hollowed out BoxDnv c511D, u n u119 n itiW. msL19th.. Higginsville, u:__:___n . PinmMo. 64037 o ip 816cm 584-7121-itm earlier.) You will find thatsomecylinders go into the block a bit more than others, woven form, ranging from 3/4-inch Japanese tissue (try Sig of NFFS Supplies due to the shape of the cowl. wide tape to 60-inch-wide sheets. for Plyspan), DT fuse (available from Sig The cowl block is carefully removed from the firewall and hollowed out. At AND WHAT ABOUT NITRATE DOPE? or in bulk from Champion Products), It’s not only the newfangled materials and nitrate dope are items that your this stage, the engine, a D.C. Dart diesel, that are getting hard to find. Colored local R/C emporium probably doesn't was installed so that the cowl could be have on his shelves. The Scale Staffel trimmed to fit neatly around the engine Squadron Flyer gives these hints: “ As for cylinder. I used dress snaps to hold the m R o A ie í nitrate dope. I've bought cans of Ran­ cowl onto the fuselage. It wasn’t until I dolph clear dopeand thinnerfrom Wag- had the fuselage covered and painted Aero, Box 181. Lyons, Wl 53148. They'll that I mounted the cylinders perma­ nently onto the cowl. One extremely PRODUCTS send you a catalog of aircraft equip­ ment, an interesting catalog, if you important item here is to make certain WORLD WIDE MARKETING that each cylinder is in line with the FOR D & R AND OTHER FINE PRODUCTS write. It may be possible to obtain clear others when viewed from the side; it is BULKHEAD SWITCH MOUNT 98^ nitrate dope and thinners from some local airport, but I’m happy with this very easy to misalign them. Nothing M O U N T S O N : approach, having the cans delivered to looks worse than to see one Cylinder Bulkhead of airplane. leaning one way and another leaning Floor of car. my door about once every two years or inside of waterproof so!” · the other. boat boxes. One disconcerting problem arose ... Or any place you when I realized that the needle valve desire. F/F Scale .... Continued from page 62 Push-rod can go in any was smack in the middle of one of the of three directions. the lines which needs to be drilled cylinders. Now what? I couldn’t have the Complete with mounting screws. comes out right on the corner of the needle valve coming right out of the top West Moore St., Santa Ana, block; this can make drilling a bit of the cylinder. The first thing I did was Phone (714) 557-1453 CA 92704 difficult. If this should happen, simply to cut off the wire from the needle valve

80 R/C MODEL BUILDER CARL GOLDBERG

2-METER SAILPLANE GREAT FOR LEARNING RADIO CONTROL and A SWEETHEART FOR FUN AND COMPETITION One of the best ways to get into Radio Control is with Sailplanes. They use low-cost 2 or 3-channel radios, build easily, and fly slowly enough for novice reactions. Vet there's a real challenge and a thrill in finding rising air currents, and getting long soaring flig h ts!

'5.

LtV

S. V cJen lie cJ^a cly really is gentle and a lady. Very easy to fly, and stable. Reacts quickly to "lift." Simple to build, yet very clean, and efficient enough for com­ petition. Optional detachable wing tip panels for small cars. Can be flown by high- start, winch, slope soaring, or by small engines or electric power. Available in good hobby shops everywhere — see your dealer!

WING S P A N ______7 8 I V WING A R E A ______663 sq.in WEIGHT (With Radio,Ready To Fly).. 22-25oz LENGTH ______41* As Published in R.C.MODELER MAGAZINE

FOR 2-CHANNEL RADIO .AND TOW, SLOPE, OR .049 - .10 ENGINE OR ELECTRIC POWER

KIT SP-1 (No.60)

$24.95 AVAILABLE IN CANADA

CARL GOLDBERG MODELS, INC.

4733 West Chkago Avenue · Chicago. Illinois 60651 year series designed to promote com­ THE SPIRITS OF ST LOUIS R/C FLYING CLUB PRESENTS petitive flying scale models of ever- increasing quality of subject selection, fidelity to scale, construction design, workmanship, and flight duration cap­ abilities. Also, to perpetuate the sports­ WARBIRDS manship and camaraderie which dis­ tinguishes scale free flight modelers from competitors in any other form of model aircrafting. The rules are as UNLIMITED follows: GENERAL SPORT SCALE PYLON RACING 1) Scale d e fin itio n : same as AMA Rubber Scale. AT ST. PETERS. MO. R/C FLYING FIELD 2) Model to be powered by twisted or FOR FURTHER INFORMATION AND RULES, WRITE OR CALL extended elastic strands. DON HOELTING, 110 CASTLE DRIVE. FLORISSANT. MO. 63034 3) Scale pilot isoptional but preferred. 1-314·921-4983 4) No plastic propellers. 5) Wing(s) span: projected span shall which extends beyond the body of the Thompson Trophy Mass Launch any be used to determine minimum re­ needle valve. I filed a screw slot on the Thompson racer OK. quirements. end of the body of the needle valve. On )une 22, there will be an R.O.W. 6) C.D. shall verify span for correct­ Next, I mounted a small hook on the left Scale event for rubber and power plus ness and make sure model meets all engine mount and another hook inside special Embryo R.O.W. No R/CH other requirements prior to registration of the dummy engine cylinder affected. September 20 and 21, Flightmasters acceptance. By stretching a small rubber band be­ annual with multi-engine, a special 7) Model is to be flown and judged tween hooks, the cylinder stays snugly in added event. Lastly, on December 7, the with gear in down position. place. When I have to make an adjust­ annual Jumbo/Peanut with a special 8) Multi-engine, seaplanes, or float ment on the needle valve, all I have to do WW-II event for any aircraft involved equipped models maybe hand launched is pull the cylinder out and back, and with the December 7 Conflict. This will all years. adjust the needle valve using a small be a mass launch special event. 9) No model having placed 1st, 2nd, screwdriver. When the engine has been or 3rd may be flown in more than three adjusted, place the cylinder back into * * * contests in this series, wing(s) span the slot. This really conceals the other­ At the January meeting, the Flight- permitting. wise obtrusive but necessary needle masters presented a beautiful trophy 10) A contestant may enter more than valve. commemorating Ray Berens. Ray is an one model in flight competition. How­ The Flightmasters have a rather busy “ old time’’ rubber modeler, avid com­ ever, only one model may be selected schedule for 1980. Here is a list of dates. petitor, and the winner of most of the for final score and only that model may On April 20. a Stahl/Lindberg contest Flightmasters Jumbo Rubber Scale con­ be used for scale judging. at Dominguez Hills College for aircraft tests. This trophy will be a perpetual type (There is an eleventh rule where the designs by these men. . .oneagainst the trophy lo be circulated for a period of minimum span of the model increases other, event for any racing type aircraft. ten years. This will occur starting with about every other year until the year They must take off from a card table and the F/F Champs held at Taft, California 1990, when the minimum span will be 50 fly an 88-foot course. Great fun! this year and every year thereafter for inches for monoplanes and 36 inches for On May 18 the Scale Staffel is holding the ten years. Along with the usual multiwing. Plus the model can use a a scale contest at Lake Elsinore. events held at the F/F Champs, the event free-wheeling prop when the span May 4, the Flightmasters semi-annual (called "Ray Berens Perpetual Jumbo reaches 44 inches. At the 48-inch span, using the Flying Aces rules. There will be Rubber Scale") will also be a regular models can be hand launched.) the following events: Rubber, Peanut, event for free flighters to consider. The FLIGHT TIMING: Power, WW-1, Mass Launch, WW-II, and scope of this particular event is a ten- 1) Flight time shall be an average of

NEW MATH? NO// 2 + 2 =1PPP It's CASS ENGINEERING'S new 2 + 2 Super Drive that equals one Potent Power Package! Available for most engines .25 through .91. Twin, horizont­ ally opposed, alternate firing smooths out power impulses for low vibration and long belt life. Reduction o f 2:1 for large, high pitch props. Ball-bearing output shaft, tempered aluminum casting. DIMENSIONS OF UNIT SHOWN, USING The CASS 2+2 Super Drive will fit O.S. MAX .40 FSR ANY power NEED!! ENGINES: L = 4-3/4" Price: .25 thru .4 5 ...... S99.50 W = 6-3/4" .50 thru .91 ____ $109 .5 0 H = 4 3/4" (Engines not included) Wt. less engines 13-1/4 oz. If your dealer cannot supply, order direct

CASS ENGINEERING, Box 420, Rutherford, N.J. 07070 (201) 438-2897 939-7766

82 R/C MODEL BUILDER FOX “ EAGLE If” REAR EXHAUST Fox Eagle II Rear Exhaust @ $125.00 Tuned Pipe and Hardware@ $37.50

An average engine specimen is coming in al just that. 16.000 Ball Bearing Equipped / Features the ΛΛΚ X-C Carburetor r.p.m. on an 11-7. given good fuel and a balanced prop We haven't seen any other .60 run faster. This engine is a veritable All Fox Eagle M's are equipped with the new NIK X-C Carburetor, "powerhouse", if really delivers on a tuned pipe, competitive Your "Hot Line" acclaimed the world's finest. The unique bolt-on cylinder head with the very best in the world. American made, it's nice to be to the source: permits a superior bypass configuration. 100 hours of running αχχ w ., time is not unreasonable given clean air. clean fuel and reason- near the source when it comes to parts. Priced right too. no im­ (out) Mo-1030 able mixture settings. Our engines stand the test of time. port duty! Side Exhaust version is available also (#26200). a builder's needs can vary. Every Fox Eagle II is test run at our fac­ tory. We know whal we put in a box and we'd like you to put one in your new aircraft. 5305 TOWSON AVE. MFG. CO. FORT SMITH. ARK. 72901 Catch the Fox Fovar . . . better than the common cold I F © X the best two flights out of five official NY 11747, is alive and well and has come flights. out with a fine new catalog (cost $1.00) Instructor . . . . Continued from page 11 2) Official flight is when duration is 30 listing all of their kits and accessories. seconds or over. One area in particular should be of airplanes because they are so-called 3) Unlimited attempts under 30 interest to most scale modelers: an Air "unpredictable." Is this really lrue? And seconds. Pix catalog listing all of their photo­ if it is not, could you recommend a good 4) Unlimited flight time. graphs, from antiques to jets. This low-wing aircraft that I could fly and not 5) Position will be assigned from catalog is also $1.00, plus you receive a have to worry about unpredictable number one through last place. 4 x 5 photo sample. maneuvers such as snap rolls and spins·' 6) Flights will be timed between 8:00 Last but certainly not least is the neat Mike Haas. a.m. and 12:00 noon. suggestion by Bob Peterson of Youngs­ If you are comfortably flying an Ugly SCALE JUDGING: town, NY, who sent in the excellent idea Stick, I would not hesitate to recom­ 1) Mooney style, with severe penalty on how to anchor the motor peg in a mend some low-wing airplanes to you. for models not meeting the scope of this very clever way. The sketch says it all.· The Kaos, Kwik-Fly. and Taurus are the series. first to come to mind and all are very 2) Position will be assigned from "predictable.” I don’t happen to agree number one through last place. with those people who say that low- 3) Scale judging will only be on a wing airplanes are harder to fly: take, as flight qualified model. FINAL SCORING: 1) Lowest total of scale and flight Competition, Sport or Free-Flight Fun buy Jetco position decides winner. 2) In case of a tie(s), scale position The Best of Nordic-Towline prevails. $14 95 Kilt Contain Hardwood Sprut« Spoi . 3) Winner shall retain trophy until A -2 C lass and lonatiom. Tubuigi, Put· non D.«- C«l Balsa and Plywood. Qwolitv She·* next event. I Strip Bolto, Top«'ed T E Stock, TALON" Covering Matmal, and Sopor 0*to>lad A · / C lass The National F/F Society has termed K ii ■ G-9 Full S* re Plans. this event the "W akefield of Scale •TOP-KICK Modeling.” Maybe some of the pure K it ■ C -8 Spon; 4 7 " rubber competitors will give Jumbo The Tolon ond Top Kiel» always place Scale, as presented here, a go. Flight- o» the AMA Nals, F.A.I. Semi's ond mony regional-local contests. Still Span: 80 masters Cliff McBaine, Richard Seifried, the Nordics to beat. Get to be o and Loren Williams contributed mone­ $ 2 6 9 5 winner....build ond lly one today. tarily toward the purchase of this note- Quality kits with mony extra features. worth trophy. This in no way affects the regular Jumbo contest that the Flight- C.A. ZAtC CO., INC. Please see your Dealer first. If non M3 LEXINGTON AVE available, you may order direct. Pleas masters hold every December. DEPT. J-3 BROOKLYN. N Y 11221 add $ 1.0Q for packing. CATALOG. 2 i Classic Models, P.O. Box 681, Melville,

MAY 1980 83 IN THE BEST CIRCLES, ITS ttber «ikiicr

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-Rot ting 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 " — JRFg

AT LAST, SOM E Q MATTER FROM HOBBYPOXY ^■■■■■■■■ΒΗ ΒΗ ΙίΒΙ

We've taken our popular, two-part, white primer-undercoat formula and made it gray. Just gray enough to please all of you who have told us you want to see the dents, nicks and ripples when you're sanding. Now we make it a little more visible, and just as efficient as ever. Of course, it’s still available in white, too. For Wood, Plastic, Metal, or Fiberglass. Hobbypoxy primer-undercoater covers well, cures and fills fast without shrinking, is easy to sand and provides a smooth-as-glass surface... with great adhesion to wood, plastic, metal and fiberglass. Whether you’re a balsa builder or molded plastic buff, whether you brush it or spray it... you can now put a little "color'' in your life with Hobbypoxy P r i m e r - gray undercoat... as good as ever, and a lot more visible. Undercoater For complete information and a how-to-do-it Hobbypoxy Finishing Guide write, today. N o w In IMRRVPÍ1YV PRRRIIPTQ a Division of Pettit Paint Co.. Inc. lUIDUVrUAl I IIUUUulu 20 Pine Street. Rockaway. N.J. 07866

HOBBYPOXY... A select group of finishing products especially formulated for hobbyists, including: Epoxy Glues · Epoxy-enamel Paints · Fillers · Primer-undercoaters · Resins

an example, the Skylark 56, which is airplanes, as we now have more power­ incorporated a lot more rudder deflec­ simply a low-wing Falcon and retains all ful engines, but the 692square incheson tion although it had little effect when the nice tendencies of a trainer. the UFO is sufficient if you keep the used (or normal spin recovery, which Dear Dave, weight down. Ten pounds is excessively was ultimately the demise of theaircraft. / have a few questions that I think heavy; you should be able to build and I suspect that airflow distortion caused might interest some of your readers. I finish (paint) a UFO at eight pounds by the bubble canopy may have con­ have noticed in the last few years that easily. (I once built a Phoenix 6, which is tributed to tbe poor spin recovery, but more and more Pattern ships, especially similar in size, at 6 lbs., 14 oz. ready to fly, I'm not entirely certain. on the World Champs level, have been with retracts.) Armed with this information, our sporting flaps/dive brakes, and I am Variable pitch props look like they present consensus is that the design of wondering if the added weight in the have some potential for the future, but the aircraft is far more critical to the plane will he offset by a good amount of are on the frontier of technology and are performance of a successful lomcevak added performance? I would be putting probably best left to the experts for now. than pilot-induced responses, with them on three new Bridi UFO’s that lam Dear Dave, perhaps the exception of entry speed. At preparing for this coming season, and I’d like to inquire about your impres­ present, in order to pursue this line of will be powering them with O.S. .61's. sions on how to achieve a true (i.e., reasoning (would you believe guess­ Also, I have been wondering about the tumbling nose over tail) lomcevak. For work?), I am constructing a scratch-built UFO’s wing area. While most ships have five years we have tried several different O.S. .35 powered (unmuffled) 2-inch 730+ square inches, the UFO has only approaches to the problem in order to 692, and since they usually push ten accomplish a genuine lomcevak. Our pounds I am a bit concerned about the experimentation to date has employed EMS SR-1 heavy loading, although I have flown the use of aft CG’s and increased control SERVO them for the past year and have no surface size with maximum throw in an complaints, only praise. Any ideas f One effort to "muscle" the airplane into the REVERSER last question. Are variable pitch props, maneuver, but all this yields is a series of Price - $10.95 as far as Pattern is concerned, only a violent consecutive outside snap rolls passing fad, or are they worth the $125 and flat spins, a few of which have been Plugs into your system between the Receiver price tag? I enjoy your column, and look impossible to recover from. Damage and Servo and reverses the direction of that forward to it each month. Brian Beck. from these always has been minimal, servo with relation to the Transmitter Stick The use of flaps/dive brakes on cham- however. We felt that we were beating a motion. Available for all popular positive or pionship level Pattern airplanes has dead horse in our obsession until this negative pulse systems with connectors in­ been common lately in an attempt to past summer, when I put together a stalled. An extremely handy device when installing your system in a new airplane. make the spot landing easier and more styrofoam Midwest Super Chipmunk predictable. Now that the takeoff and powered by an O.S. .20, which would Master Charge and VISA landing are eliminated from the FAI perform the lomcevak perfectly (i.e., Dealer Inquiries Invited pattern. I expect to see fewer of these tumbling) each time. ’Twas wondrous to ELECTRONIC MODEL SYSTEMS devices due to the weight disadvantage. behold. It was built for four channels, P.O. Box 1242, Placentia, CA 92670 The current trend is to slightly larger had the CC as shown on the plans, and I MAY 1980 85 mass of a typical model is too low to overcome this. A large model with a VINTA6E R-C FLANS small horizontal stab will usually do a D ayglow lomcevak fairly predictably, as proven by Mark R adcliff’s Super Fli T.O.C. Perm agloss airplane. I’d guess your Chipmunk does it so well due to its small stab size. This is also the reason it is marginally stable and USE IT FOR spins easily. TRIM & ALL "YOU BOTTOM CAN SEE IT Dear Dave, SURFACES A MILE AWAY!" 9 FT. WING SPAN Please instruct me as to why flat spins 4 LARGE PLAN SHTS.- PLANS $ 20.00 occur. Entry as follows: normal upright QUADRA OR GLO ENGINES fiDD , 2.00 P0ST4GE spin entry, but possibly with excessive rudder. When spin reaches rotation speed, slowly start feeding in down CATALOG-OVER 50 PLANS 50 φ DEALERS WRITE elevator while still holding left rudder, COVERITE S ID M O R G A N left aileron and moderate to full power. // 420 Babylon Rd., Horsham, Pa. 19044 13157 Ormond, Belleville,Mich.48III us a As elevator passes through neutral, the spin rate accelerates. As you reach full Now if I may take the soapbox for just down the model goes flat and you can BROWN CO-2 ENGINES ENGINES A ll IN STOCK NEW CHARGER one more moment. The lomcevak. as hear the engine lug down, the opposite ANO S SIZES OF TANKS BROWN ENGINES seen in full-scale aerobatics, is rarely of unloading. If right aileron is added COMPLETE CATALOG $1 00 properly performed by miniature air­ the spin is even flatter. That is the entry HARO TO FIND ACCESSORIES KITS ANO for four-channel flat spins. RIANS FOR RUBBER ROWEREO MODELS craft. There have been articles written řHONt t r m 469 βόΠ I describing techniques of entry pro­ Three-channel ships without ailerons Peck-Polymers cedure. however, none I'm aware of do the same thing. I own 7/2 of a Cox BOX 2498-MB lA MESA, CALIF 92041 expound on the proper design for the two channel T.D. .049 powered Cox Q.T. maneuver, as we feel that design is the and we’ve spun left, applied down scale Stephen’s Akro which will utilize single-most important factor determin­ elevator slowly and spun the thing flat as what we feel are the necessary design ing success of the maneuver. Well, Dave, can be. characteristics: higher wing loading, there you have a few of our theories. We The other day I got a beginner's Q.T. double tapered wing, symmetrical air­ would appreciate hearing some of your to go flat on the very first flight. . . and it foil, and a surplus of power (torque). thoughts on the lomcevak. Dave Mallett. never came out. No damage. My An­ This should influence scale effect as it Your observation that models don't drews Η-Ray with three channels has relates to mass/inertia. although cre­ do this well or often is correct, and I have spun all the way to the ground with nil ating some less desirable flight charac­ some theories of my own on why. On damage. My Quickie 500 will do it teristics such as high stall speed and most models the stab area is large upright or inverted. We’ve spun the landing approach speed. enough to prevent this tumble, and the Southern R/C Alley Cal the >ame way. Recovery, when controls are neu­ tralized, seems to always take three turns For Radio Control or Outdoor Rubber & C 0 2 or more: some don't recover . . . spec­ and a Complete Line of Indoor Models tacular. MICROS Come to Micro-X for your Modelins Needs! Why does down elevator make models spin fla t? Please instruct me why it happens. It has me stumped completely, and no one yet has come up with a good answer. Stuart Richmond. EXETER R/C. MICRO-X PUTS EXCELLENCE The flat spin is one that has always stumped me also, but I must admit to .23-,35 Powered IN YOUR MODELING!! Fun acrobatic being a little light on knowledge of the with performance aerodynamics of spins in general. I as good as it theorize that the flat spin occurs when looks!! - $54.95 Vi A the inertial effects of the airplane com­ R/C pletely overcome the aerodynamics, but sport scale this is only a guess. Try this one on model designed Harold deBolt or Don Lowe, as they can to fly in small probably give you a much better answer areas at slow than I can. speeds and Dear Dave. perform flawlessly I look forward to reading your column at higher speedsl Power .049 to .09 every month. You have many helpful TAYLORCRAFT - $28.95 hints which are very useful in my flying and building. I am building my first Pattern plane and have one question (or you. I would like you to explain what anhedral in the horizontal stabilizer does to a plane, its advantages and disadvantages, etc. jerry Hunt. =1 Anhedral in the stab of a Pattern airplane is used to counteract the natural pitch down when hard rudder isapplied. Stinson 125 Taylorcraft This is its primary advantage; the dis­ Send for advantage I’ve found with anhedral is Micro-X· Indoor $4.75 that theairplane tendstobouncearound P.O. Box 1063-A :ale O utdoor $4.75 in pitch in a turbulent crosswind. There Lorain. Ohio 44055 le-COj O utdoor $5.95 are other theories on how to counteract this pitch down, including lowering the

86 R/C MODEL BUILDER stab, and I have been thinking of an­ other which involves slanting the rudder hinge line back considerably. Dear Dave, Here is an answer to a problem I was H oM m l PRODUCTS INC. having a while back and hope you or MANUFACTURERS OFJEROBEE R/C CARS some of your readers can use. Whenever WINNER of 70% of ALL 1/12 SCALE ROAR NATIONAL TROPHIES I did a square loop or an Inverted Top Hat. the engine would go lean and FOR OUR 10th ANNIVERSARY burble or sometimes even stop at the bottom of the maneuver. It took a while THE LATEST IN RACING TECHNOLOGY to find out what was going on, but I finally figured that when the airplane was coming straight down, the fuel THE ALL NEW would flow forward in the tank and LIGHTNING 2000 leave the clunk exposed to the air. Even at idle, the engine would burn enough fuel in the line to leave an air bubble big enough to kill the engine when it was EXPERT CLASS advanced to full throttle. So here is the 1/12 SCALE solution. Instead of using a regular clunk. I made a small reservoir clunk ELECTRIC RACING from brass tubing like so: CARS

FOLLOW US WE’RE STILL THE LEADER

Features Quality And Adjustability Unmatched By Any Other Electric Race Car

For complete catalog, send $1.00 to: JOMAC PRODUCTS INC., 12702 N.E. St., Kirkland, WA 98033

This reservoir holds enough fuel to requiring right rudder to fly straight. He This is such a basic solution to many run the engine until the maneuver is immediately knew of the problem (not problems that I am surprised we don't completed. I’ve never had an inconsis­ enough washout in the left wing panel). suggest that we all try it when we’re tent run since. I put extra washout in the panel and the having difficulty building or flying a new I sure hope you keep writing your plane flew like a completely different model. Cox and Bridi now have "hot column. It is really interesting and one of plane. lines" and I’m in favor of this concept to the few articles that is aimed toward the I saved myself a lot of grief trying to fly assist us all. more experienced modeler. Henry an unflyable plane by a $2 phone call to Keep up the excellent column andan Piorun. the guy who designed, flies and knows excellent magazine. Steve Benjamin This is probably the best solution I’ve the specific problems of a design. I also This is one of the great things about seen for this problem. All I can say is, "I saved myself the possibility of rekilting our hobby/sport. Almost all our industry wish I’d thought of that.” Thanks. $20 to $30 worth of airplane, engine and people are active modelers themselves Dear Dave. labor. and are anxious to help. I called Bridi about the problem I was I was surprised to see my letter in your Dear Dave. having with the T-10. I talked to the column when I received my February One thing that really bothers Novice plane’s designer. I had added washout issue today. Since I wrote you, I learned fliers is the right turn syndrome. Don’t to both wing panels to insure extra a very valuable lesson that you might know why. but it really gets to fliers. stability. It seems that the airfoil design pass on to your readers. There seems to be a certain point in the required NO washout to fly properly. When having trouble with an airplane, right turn that results in a violent split-S try and call the manufacturer. They're So. after talking to the manufacturer. I that doesn't occur in the left turn. Don't delighted to assist a fellow modeler who solved another problem. know if you have ever experience this, is flying their plane. Again, an inexpensive telephone call but it is there. Could you give some help I called Mile High Models and ex­ saved me a lot of headaches and prob­ in this? And how. when you were a plained about my problem of the plane lems in trying to get a plane trimmed novice, you overcame this. Cal Lane. not responding to rudder command and out. The right turn syndrome is very real, MAY 1980 87 u μ all right, and I must admit that the first "models” in favor of "miniature air­ Hobby llopn time I tried one was at my first contest, craft” : "Gramatically and Webster-wise, WB hob\ty ipeaM tin ^ when a right-hand traffic pattern ap­ I guess ‘model’ is not really accurate, but proach was required, and I darn near OLD TIMER KITS (Full and Partial Kits) it sure is simpler to say ‘model’ or f y n o Models--Full Kits—. 20 to .40 engines crashed. The only way to overcome this ‘modeler’ than ‘miniature aircraft’ or 1941 Playboy Sr.. 80" Span $44.96 1936 T u rn e r S pe cia l, 84" Span $53.96 is to practice shallow right-hand turns at ‘miniature aircrafter’ or ‘miniature 4X'a Models--FulI K il» --G a a a nd R u b b e r high altitudes until you feel comfortable aircraft builder/flyer.’ Nothing wrong 1940 Buzzard Bombshell. 72” Span, .35 Eng. $47.95 1940 B ab y B u z z a rd . 36" S pa n . .020 E ngines $12.95 before trying anything steeper or lower. with keeping things simple! 1941 Climber. 44" Span Rubber (41 Nats Win)$13.95 Why this syndrome exists has baffled me "Some people will always think of M idw ay Model Co. -Full Kit9-.10-.1S. R/C 1938 P ow erhouse ( T s ib i) . 50" Span $33.96 for many years, and after talking to an models as toys. So who cares? Beating 1941 Air Trails Sportster, SO" Span $33.96 English friend who commented that in them over the head isn’t going to R/N Models--Full Ktt-.049-.09 F/F or R/C 1941 Simplex. Scaled to 40" Span $19.76 England they have the same problem change their opinion. P i W Semi-Kits--All Parts Machine Cut with left-hand turns, I’d guess it must . .1 have always felt that there seems 1939 Korda Wakefield. 44" Span (Plan Extra) $6.00 1940 So L o n g . 50" Span (P la n E x tra ) $10.50 have something to do with driving on to be a basic difference in the philoso­ 1941 Playboy S r.. 80” Span (Plan Extra) $14.00 1941 Playboy Jr. . 54” Span (Plan Extra) $10.50 the right-hand side of the road. It sounds phy of Free Flight vs. R/C. R/C’ers seem (Plana--Korda. $2.50; So Long. $3.00; Pluyboy S r.. crazy, but I can’t think of anything else to be more image-conscious. In a sense, $3.00; Playboy Jr. . $2.50) F ly lin e Modele--Full K it--. 020 R eplica that is different. that’s understandable, since they have a 1937 Q ua ke r F la sh . 34" Span $14.36 That is about all for this month, and I noise and space problem, and if they can J i R Models--Full K its--. 020 Replica 1942 B ro o k ly n D o d g e r. 32" Span $10.75 still have quite a few letters left un­ impress the right people, it can mean RADIO CONTROL KITS answered, so we are in good shape for at flying sites in city/county parks, etc. I GLH It (Ace R/C). 32*". .051. Build-up Wing $16.11 Cesena 170A (Guillows). 45” . .049-.051 $27.00 least one more month. · don’t know exactly what some R/C’ers *A Pete (H of Balsa). 42" $26.95(SPECIAL***$22.911 Icarus (Midnite Models), 80" (2 Meter)Glider $35.96 are looking for, or what they want from F4U-1A Corsair (Sterling). 36". .10. 2-4 Ch.$28.76 the general public. I’m reminded of that FREE FLIGHT KITS Hannan...... Continued from page 54 Velie Monocoupe (Flyline), 22*". Rubber/CO 2 $8.96 cartoon which showed the modeler as P-61 Black Widow (Sterling). 37*". Rubber $18.96 parallel, if less spectacular increase has viewed by different people: Fokker Trlplane (DR-1), (Lee's). Peanut $2.95 Porterfield Collegiate (H i-Flyer), 17", Rubber $2.25 been taking place in the philatal com­ By his neighbors: a baby crawling Consolidated PT-1 (R/N Models). 36'. 020/049$ 13.45 munity, with surprising appreciation in around in diapers. Aeronca Chief (Comet). 54" Span, Rubber $5.00 ELECTRIC SYSTEMS AND KITS the value of air mail postage stamps. Eor By his wife: shoveling money out the Astro 25 TWIN System $200|SPEC1AL********$150.00] example, a British commonwealth stamp window. Astro 25 Prop Reduction Drive Unit $26.96 Astro Voltuge Booster (From 12V to 24+30V) $26.96 commemorating the first non-stop aero­ By a hobby shop owner: all talk, no Fornier RF-4 (Astro). 72" Span for 15 Motor $46.70 Bushmaeter (Astro). 60" Span for 25 Motor $42.46 plane flight across the Atlantic has risen spend. in value 184 times since issue. Now the By himself: a dashing silk-scarved Shipping and Handling: Send $1.00 for latest Up to $15.00 Add $1.50. catalogue, (a copy Commonwealth of Dominica is issuing a pilot. $15.01 to $40.00 add $2.00. will be sent free, new series of aviation theme stamps Anyway, not all R/C’ers are so image­ $40.01 to $60.00 add $2.50. upon request, with and over $60.00 add $3.00. an o r d e r .) virtually guaranteed to "fly,” since they conscious, but many are. (C alif. Addressees add 6% Hobby Horn are made with 23 karat gold! Included in "On the other hand, the average for State sales tax.) Sond ••hobby specialties·* M .O .. Check or Visa/MC P .O . Box 3004 the run are examples depicting the F/F’er seems to be in it primarily for the (· ♦ Exp.). COD = Exact Seal Beach. Ca 90740 Wright brothers, a Zeppelin, the Con­ Postage ♦ COD Fee. (714) 894-6223 fun and challenge. That, plus (for some) corde SST, and Neil Armstrong with his the competitive aspect, and (a big part) moon lander. The asking price? $19.59 the camaraderie seems to be enough each! Let’s see now . . . how much balsa justification. Seems to me that is what a would that buy . . . hobby is all about. SPEAKING OF AIRMAIL “ I don’t want to get into a shouting The U.S. Post Office is now in the match or make it an R/C vs. F/F or F/F vs. mailing-carton business. The one which AMA thing, but now and then certain caught our attention was sized 15x12x10 things prompt me to take pen in hand. MIDWEST inches . . . perfect for transporting a And frankly, our models/miniature Peanut! Price is a very reasonable 50 aircraft are toys! Sophisticated toys, MODEL SUPPLY cents. maybe, but toys nevertheless, in the THE MYSTERY SHIPS same manner as a set of golf clubs, "Your Supplier, According to the Associated Press, a fishing gear, sports cars, etc. Again, (if) couple of U.S. Navy fighter planes are the guy seems to have an image prob­ Not Your Competitor" missing in Durham, North Carolina. Not lem, I can’t help but feel it stems from a • Stocking over 150 missing on a mission, but missing .. . lack of self-esteem on his part. That’s a lines of merchandise period! The Navy says that two F2H-2 nasty thing to say, but it often applies to • Fast service to all parts Banshee aircraft were presented to the those who try to impress others with the city during 1968, and they wanted to of the USA and also on things they do. find out how the craft were being cared " .. .it is much more important to try to foreign orders for, displayed, etc. raise the general public’s awareness and • Special cash discounts But the Durham Mayor and City esteem of what modeling really involves, up to 10% Manager have no record of ever having rather than to try to come up with a • Freight allowances up to 5% received the Banshees at all, and have fancy name for the hobby/sport which • New Golden Dealer program asked the Navy to produce a receipt we enjoy. I would be willing to bet that if proving actual delivery. So far, the city you told someone. Ί fly miniature • Weekly mailer has not located the fighters and the aircraft,' he would be no more im ­ • Phone orders encouraged admirals have not found the receipt. pressed than if you were to say, ‘I fly DO WE REALLY NEED A NEW IMAGE? model aircraft.’ DEALERS ONLY Modelers are a minority group, let's "Public respect can come only CALL US AT 312-759-1955 face it. While still unable to settle through a better understanding and among ourselves whether we are knowledge of what is involved, and M W 7791 engaged in a hobby or a sport, some changing the name is one of the least MIDWEST MODEL seem even more concerned about the effective means of doing so.” way we are viewed by the general Chris also pointed out that we should SUPPLY CO. public. try to upgrade the understanding of all }U Wp—»««« > ■»»«».«« ■ NMI 11} /M iHt Chris M. Matsuno offers these aspects of modeling, regardless of any A FI LL UXE MODEL DISTRIHITOR thoughts on the matter, prompted by personal preferences. SENt'llSI. DEALERS FOR OVER 30 YEARS published efforts to eliminate the term IN A SIMILAR VEIN 88 R/C MODEL BUILDER Bill Warner, writing in the Flight- masters newsletter, offers food for thought from which we have abstracted the following: “ This is the time of year to JOHN POND mull. But then, I mull often. . . .at my age, I have decided that building and flying models as we do takes on a new Old Time Plan Service and changing significance with the passing of time. Each model represents The largest selection of plans in the world at the most not only the obvious challenge that reasonable prices. Each list 75c everyone knows, but it also represents an increment in time, a measure of your No. 10 OLD TIMER F/F GAS own mortality. What you see (flying) is No. 10 OLD TIMER RUBBER/TOWLINE the culmination of a labor that may have No. 10 OLD TIMER FLYING SCALE A through K started three weeks, three months, or three years earlier. You are watching No. 10 OLD TIMER FLYING SCALE L through Z something beautifully tangible, some­ thing you chose to invest your time in. P.O.Box 3215 That element is gone forever, but the San Jose, Calif. 95156 result is something to contemplate. Phone (408) 292 3382 . . .it may be that this heavy contem­ plation as to the symbols one reads into Administration, Government Printing da. Also, to prove a point about heli­ modeling is misplaced. But what does Office Stock No. 5011-004. This guide copters, I flew in fixed wing Novice cause up to keep up this seemingly describes the 1962 revised standards for Pattern at Tangerine w ith this same inexhaustable pursuit? Perhaps if the structural examination of full-scale machine. I was able to do all of the answer were known, then we would gliders. maneuvers and scored rather high, cease to pursue." Eric Lister’s Sailplane Designer’s considering that all the odds to do so for Which sort of brings us full-circle back Handbook is still in print and is worth the first time were against me . . . and to our lead-in quotation, doesn’t it? your time and effort. He describes with no practice! DOUG McHARD’S CARS fundamental aspects concerning the Or course, there is a much easier way Readers of WW-II FLYING MODELS. stability criteria and other aspects of to fly inverted, and using this method. I marketed byRCMB, will be familiar with sailplane design. He compares various am sure that anyone who can fly around the name Doug McHard.asthe designer well-known models in different regards, with a good collective helicopter can do of three of the featured models. In and presents a step-by-step procedure so inverted with good concentration addition to his model aircraft, Doug has for the design of R/C sailplanes ranging and practice. The method that I am long been involved with the production from those that are easy to fly all the way referring to makes use of reversing of model automobiles, to the extent that to those that promise really high switches on the transmitter. These they finally have become his full-time performance. switches will simultaneously reverse means of support. His company, Som­ See you next month. · collective, fore and aft, and rudder. The merville Models, now produces a fas­ end result will be that inverted flight cinating line of cast-metal car kits as well then requires the same transm itter as finished collector's models, each Chopper .... Continued on page 46 controls as upright flight. You will need a exhibiting the degree of detail for which was used to lock out the throttleservoat transmitter with reversing capabilities in Doug is renowned. a predetermined position while in flight. the board that can be brought outside Although a U.S. agent has not been This took some doing in order to have to a conveniently located set of appointed as of this writing, information the proper blade speed as the machine switches. An example is the Kraft seven- about these fine offerings may be ob­ rolled to inverted. To add inverted channel. 1976 or newer. Some mechani­ tained by sending an International Reply collective, I had to pull back on the cal changes must also be made in the Coupon (available from post offices) to: collective, and to go forward, pull back transmitter to accomplish the splitting of Sommerville Models on cyclic . . . all the time giving reverse throttle and collective. Westfield House rudder commands. This is somewhat like You should now prepare yourself to 104 High Street, Billinghay driving in four o'clock traffic with all the seethe helicopter from a totally different Lincoln LN4 4ED car’s controls backwards! and unfamiliar point of view. You will ENGLAND Using this method, I was able to fly the have to select a part of the machine to Tell ’em RCMB sent you! same Heli-Boy to first place in the Expert watch while inverted. You should also HOW’S THAT AGAIN? Helicopter category at the ,1979 Tan­ be prepared to react to a machine that Los Angeles newspaper columnist gerine Internationals in Orlando, Flori­ responds "backwards” : for example, Jack Smith, regarding man’s opposable thumbs that supposedly separate him from the apes who have otherwise THE similar hands: "This leads to the idea that if apes had opposable thumbs we "NEW STANDARD'' would find them building motels and model airplanes." · FOR GLOW PLUG CONNECTORS Soaring...... Continued from page 31 CHECK THESE FEATURES interested in understanding aerody­ P A T E N T p e n d i n g 1. Push, t wist, itslocked on. namics. Then there’s The Encyclopedia of Model Aircraft, edited by Vic Smeed Still $2.95 2. Push, twist, its off. 3.Will not . .. come off, even under heavy (Octopus Books, Ltd., 59 Grosvenor at your favorite ' ' Street, London W 1, 1979) w ith its hobby dealer engine vibration. 4. Will not account of R/C soaring within a larger u notvfäiiabit. wntwdirect. 5 0 ^ it) outtHi* u.sj. short out* 5. Positive spring perspective. Those interested in scale contact. 6. 30 inch lead wire. might care to reference Basic Glider Criteria as published by the Flight MODEL PRODUCTS CORP. BOX 314 Pompton Plains, N.J.07444 Standards Service, Federal Aeronautics MAY 1980 also had problems with the wind (Bob r later found he had a bad cell), so we HAVE WE GOT decided against a flyoff and ftipped a ' J ■ coin instead. I lost, so Bob got second in A SYSTEM FOR YOU! scale and I got third. That wrapped up the contest. We all Pro Line has a radio control had fun, and we also had a sense of system to meet your needs in the accomplishment by beating the odds air, on the ground, and in the water. imposed on us by the wind. In retro­ If you are starting out spect, I think the best strategy for and want something better, contests is to assume the wind will blow, and build planes that will handle it. look at the Pro Line CADET series. k However, Hank West, my flying buddy, If you're the sporting or and I have found that for some reason competition type, ask to see electrics generally do better in wind that Pro Line's "m iddle of the line" their gas-powered counterparts of the COMPETITION series. And if you τ ja same size and wing loading. This is need the extra features to win that especially dramatic in the 020 size, important contest, the Pro Line where we both have had a lot of experi­ ence with both gas and electric. Neither CUSTOM COMPETITION series of us like to fly gas 020 in the wind, but is for you. electric 020 does very well, maybe When it comes to quality, because of the smoother power. you can’t beat Pro Line. Some of the planes that did not fly Watch for the new Pro Line were very interesting. Dale Black's Red 3-channel system. Zephyr was beautiful, with a geared Astro 15, and Ron Duly’s U-control Zero It's coming! with the Astro 020 F/F unit was a work of art. Bill Wendt’s quarter-scale Farman All systems available with was most impressive, using a geared single or dual stick. Astro 15. The pilot came complete with a real leather flying cap and fur scarf! Ferrel Papic’s Blériot VII with an Astro Pro Line Electronics Inc. 020 F/F system was an unusual subject 10632 North 21st Ave., Suite 11 Phoenix, Arizona 85029 and one of the two free flights that did have a successful flight in the wind. (602) 944-4626 a subsidiary of Pace Industries Until next time, enjoy the electrics v. and don’t let the wind keep you down! · turns to the right while upright will be The OCTURA CONNECTION’-lhe left turns while inverted, and if you get F6C-1...... Continued from page 19 in trouble, you will have to climb out inverted and not just set it down. You the insignias are, would you believe, will also need to practice entry and exit made from Monokote. Finally, the fire from a safe altitude. extinguisher is made from balsa, Mono- The flipping of the reverse switches kote covered. It has a bamboo handle FLEXIBLE SHAFT COUPLER must come in at the proper point of roll and a fire extinguisher label from a Sears so that the reversed controls are at the catalog. right time, especially the collective. I An excellent source of detail and would suggest that you “ dry fly’’ your documentation on the Army version transmitter until you feel mentally (the P-1) can be obtained from Peter comfortable before trying to actually Westburg. My documentation on the fly inverted. F6C-1 came from Wylam book 2. After I Should you wish further information had all the detail on my Hawk, I used on inverted flying write to me care of steel wool and sort of burnished the RCMB simulated metal panels. I then took No. With inverted flight now a practical 400 wet-or-dry and lightly scratched the reality, many people are taking a dif­ Monokote, first one way, then at 90° to ferent look at R/C helicopters. the first way. This scratching is done to Good luck flying inverted! · simulate fabric. Scratch it only at care­ fully selected points. We are only going to create an illusion of fabric, and it’s Electric...... Continued from page 45 very Questionable that fabric threads Additional Collets: $1.25 ea. could be seen with heavy dope paint on 05 pylon racer, and third went to Bruce it. The Octura Flex-Hex Coupling tor flexible McAvinew with his Astro 05 Electra Fli. shafts uses an interchangeable collet, Now I was ready for the last step in (available for .250, 187, .150 or 135 Bob Boucher and I tied for second in completing the finish on my model. diameter cable) to hold the cable securely scale with one flight each on our planes. After cleaning the model with Hobby without fraying the end as with set screw connectors. Available to fit %.-24, V.-28, I flew a twin Astro 020 Grumman Poxy thinner, I mixed some Hobby Poxy 7mm or 6mm threaded crankshafts. When Widgeon, a small amphibian seaplane with satin finish catalyst. Instead of ordering specify thread and collet sizes. used by the Coast Guard. This model adding one part thinner, I added 1-1/2 Order directly only it not available a! your local bobby weighed 36 ounces and had 300 square parts. Thus, the Hobby Poxy will dry dealer — add 10% lor postage. Illinois residents add additional 5% tor sales lax. inches. It flies rather slowly, and in its faster, and two coats allows for better Send 50c lo t catalog and price list to one flight it could not make headway coverage. Using an airbrush, I gave the OCTURA MODELS, INC. against the wind; on its landing ap­ entire model two coats, one right after Celebrating our 25th year* 1" proach it stalled, fortunately with no the other. The effect was stunning. The ^ 7351 N. Hamlin Ave · Skokie, IL 60076 damage. Bob’s Porterfield flew well, but bonus was that all trim details were 90 R/C MODEL BUILDER sealed and stuck in place, and all the Monokote seams were almost com­ MAMMOTH SCALERS Wo now have available a ocrplcte line of pletely hidden. onginesnounts and nuf f lers for moat .90 to PRECISION After assembly, the finished Hawk is 1.5 engines such as QUADRA, WEBRA and etc. an impressive model. It’s large for a TOOLS biplane, with a 63-inch span (top wing) and a 44-inch fuselage. My F6C-1 Hawk ACCURATE handled very well in its ground test. It TOUGH was much better than any of the other biplanes I have flown. The forward gear Made of finest qua lity s te e l to and the big tires made even crosswind strict controls handling an effortless affair. In the air the Hawk is a rolling fool, and it’s no SET OF 6— Packed in see thru box slouch in the other departments either. The light wing loading really paid off in BLADE SIZES: several significant areas. Tne model 1/32 - 5/32 Write or call for catalog and price info. could be slowed down to a very realistic Stock No. speed without fear of stalling. In maneu­ Quarter Headquarters vers such as an immelman, square loops 426 $ 6 .9 5 and Cuban eights, the power-to-weight ratio helps pull the model effortlessly skill involved in Combat flying until they over the top. have either spent a whole day at the ONE HANDLE No, the F6C-1 Curtiss Hawk isn’t as circles or have gone to several meets. 5 DIFFERENT TIPS colorful as the P-6E Hawk, but it makes a Everything is so fast that they can digest it INTERCHANGEABLE contest-winning 2-inch scale model. It only in small chunks, possibly picking up was my first scratch-built effort. To date, Firmly held by non-slip a little from each match. Of course, if chucking handle. my F6C-1 has placed first in every they first get the chance to watch some Heat treated for hard & contest it’s been in except one. In that long use. Slow Combat, there is less of a problem. contest it placed second only to my own BLADE SIZES: 1/32, Sparmann P-1. Its highest honor so far is Even though Combat is in general a 3/32 & 1/8. Also Phil­ 1st place in team scale at the 1979 healthy event, I wonder if this over­ lips type & layout scribe Western Scale Nationals. If you choose powering speed and action is keeping to build the Hawk I am sure it will bring potential fliers from joining in on the Stock No. 425 $ 4 .9 5 you all the pleasure it has brought me.· fun. Even in SlowCombatthespeedsare SEN O 25C FO R CA TA LO G pretty good and the models turn quite tight; in fact, current Slow Combat C/L ...... Continued from page 53 models would kick the tail off earlier Fast ENGINEERING Rtf If Mf««f Jtffc Ur—i. (* .< ·»· /Ih··· i tM JI cerned about not being able to handle Combat models, back when there was the speed and turning abilities. Went only one Combat event. out on Saturday for a few test flights and had my hands full. I used my best model and best engine, although I did consider tying a streamer on to slow things down a bit. Ended up not using a streamer, as there were other fliers there and I cer­ tainly didn’t want them thinking that Dirty had any doubts about his ability to handle a Combat model! Realistic R/C Aerobatic Trainer The first flight was really scary, the model was about 20 feet ahead of me all the time and I had to keep it at least one mistake high. The second flight was a little better. By the fourth I was starting to feel much more comfortable, but during that flight I finally got an appre­ ciation for what haopening-by specta­ tors, even those who are into modeling, see when they stumble onto some for- real Fast Combat action. They just can’t believe their eyes and usually say that it has to be impossible to actually fly the models in any kind of control. Some even go on to say that winning must be based on sheer luck. Specifications: Wing Span 55-1/2". Wing Area 615 Sq. In. The problem, of course, is that they Weight - 4-3/4 lbs. Radio: 4 channel cannot see what each flier is doing, or at Features: least can’t see why he is doing it. They • Precisely Shaped & Machined Balsa Construction. see somebody like Brasher tuck in­ • Molded windshield & ABS Cowl & wheel pants. verted, just barely missing the ground • Preformed Aluminum landing gear. and seem to think he just go lucky. What • Aluminum Motor Mount. they don’t know is that he and many • Full Size Plans & Detailed Instruction Manual. others can do it every time, and in fact purposely get that low. trying to scrape MIDW EST PRODUCTS COMPANY Send .SO for the other guy off on the ground. 400 S. Indiana Street Hobart. Indiana 46342 complete catalog. It has been my experience that spec­ tators don’t even start to appreciate the MAY 1980 91 First all-scale Championship selection program in R/C Precision and Sport .S. Scale Haslers Scale. The best fliers will do battle in an event specifically for them." Only the cream of the crop in Scale from around the country will compete in the premiere Masters Championships this October. 1980 U.S. SCALE MASTERS CHAMPIONSHIPS OCTOBER 3, 4, 5, AT MILE SQUARE SITE (Fountain Valley, CA) HOSTED BY SO. CALIF. SCALE SQUADRON REGIONAL FLY-OFFS TANGERINE: (Event already down WESTERN SCALE NATIONALS (August 16-17): Participation is invitational only lor this year) So. Calif. Scale Suadron Bert Baker. C D MINT JULEP (April 26-27): 15712 Graham Ave *1 For more details on the U.S.S.M.C. program, contact: Dale Arvin, C.D Huntington Beach. CA 92649 3428 Charles Town Pike Phone (714) 893-3364 Harris Lee, U.S.S.M.C. Coordinating Chairman Jefferson IN 47130 c/o Scale Squadron Phone (502) 588-9109 (O) MILWAUKEE FLYING ELECTRONS (August 23-24): (812) 283-5719 (H) Russell Knetzgor. C D. 24742 Meridian 2625 E Shorowood Blvd MATTY SULLIVAN MEET (June 7-8): Dana Point, CA 92629 Milwaukee. Wl 53211 Melvin Katz. C D. Phone: (414) 271-1862 (O) Phone: (714) 760-9466 (0) 9200 New Bustleton Ave. (414) 962-0637 (H) 805 Cabot (714) 493-8083 (H) Philadelphia. PA 19115 AMA NATS Phone: (215) 676-7618 (H) (Check with AMA for rule book to be used) ALL EVENTS WILL USE THE 1978-79 AMA RULE BOOK. PRE-REGISTRATION REQUIRED AT ALL MEETS — CONTACT THE APPROPRIATE REGIONAL C.D. ‘This program is designed not to compete with the AMA Nats, but rather to complement it.

IS A ONE-DESIGN COMBAT EVENT piece of balsa, but that should also bean can’t convince people like Mathis that THE ANSWER? important consideration. the one-design event will be around for The direction I am going with all of Let me tell you who I personally would a long time, not subject to yearly changes this rambling is that possibly it is time for ask for help in designing a one-design in model design, then the manufactur­ a one-design, one-motor event for model. I’d ask Dick Mathis, commonly ers will not be interested at all. Having a Combat. The model should be easy to referred to as “ Fast Richard.” He knows couple of one-design kits available off build, fly slow yet turn relatively well. his way around C/L models, both from a the shelf of local hobby shops would be The easy-to-build part is pretty simple, flying standpoint as well as design. He of tremendous value when promoting as many Combat fliers have put their has flown Combat, so knows how the the event. Don’t ever forget it. mind to developing simple structures, model should perform for a novice flier. For the motor, I’m not too sure about and the techniques are well-known. Most important of all, F/R is in the what to do. It would be real nice to pick What is not quite so well-known are the business of kitting models. Let me tell out one consistent, super strong, readily ways to get maximum use from each you, this is probably the best way to available and fairly cheap motor to learn how to get a lot of parts out of each specify, but look around and tell me if piece of balsa. Many kit manufacturers you see one. The K&B .35 plain bearing have swept the profits off the floor and would have been a candidate, but it was RI * 9HIRT9 thrown them away, which is probably discontinued a year or so ago; any now why we keep seeing so many new found in shops are leftovers. The plain manufacturers replacingthose that were bearing Fox .36 is another choice, but I “ new” only months ago. Looks like an just heard that it too has been discon­ easy business to get into, and probably tinued, although that is a rumor that I is, as many models can be kitted with have not confirmed with Fox. only a few power tools, but the passing From there we can pick on a couple of of so many manufacturers has to be a big motors, but I started with the K&B and hint that turning a profit is not easy. Fox because their availability was always For the model itself, we would no quite good; most any shop had one or doubt have to stick with all-wood con­ the other at least. Easy availability of the ME AND MY RC struction, as foam techniques are still required equipment is another big 4 COLOR not universally accepted in Combat. factor in this talk about one-design, so (EXCLUSIVE RIGHTS Wing construction would need to be has to be carefully considered. FROM ROYAL CROWN COLAI £ simple, yet strong. The airfoil should Most have realized the good old Your choice p l a n e probably be kinda fat, as this drag will standby, the Fox .35 Stunt motor, has not b o a t c a r on poly FLI CAP slow top speeds down, yet can give more been mentioned. Although I still like ester/ cotton T-shirt lift to get the model to turn well. Most that motor for light and small Stunt With novice Combat fliers seem to be able to models, I'm not sure that it makes a very AMA WINGS AMA Wings cope with fairly tight turns, even after good Combat motor. It is designed to 4 COLOR minimal practice, but the speed be­ alternate between a two stroke and a (PERMISSION FROM AMA) tween maneuvers does mess them up. four stroke, something it does quite $6-50 The tighter turns also help in panic well, but when asked to stay on peak Size S, M, L, XL + 50* Postage situations where full up or down is power for a long time, as in the constant cranked in, not knowing which to do maneuvering of a Combat match, it has a We do custom work for clubs, first. tendency togo lean.sometimesquitting special events, businesses Before getting off the subject of the and then being very hard to get re­ Information sent on request. model itself, any talk about one-design started. needs to be backed up with a proven I will admit to having seen some Fox model that will be around, without .35 powered Slow Combat models that řLI dř 9HIRTC changes, for some time. Bringing up the worked well, but then the people setting name of Mathis was not an accident, as the needle valve usually knew what they 5132 DEL REY · LAS VECAS. NEVADA he is one of the manufacturers who were doing and were able to get that would be interested in kitting a one- setting that gave peak power in turns, (702) 078-1624 89102 design model. But if the Combat fliers yet was just slightly fast in straight and

92 R/C MODEL BUILDER level. We should by now know that novice Combat fliers, the people bound to be most attracted to a one-design event, tend to screw the needle in until the motor slows down and then to run it back, but just enough to get peak revs Master Caddy' back. This setting sounds great on the ground, but at the first loop the motor CADDY: $89.95»Weather, Fuel and Mar screams out in pain and then suddenly Resistant Surface in 4 Colors: Blue, goes silent. Red, Orange and Yellow»Lightweight· This discussion about motors should Tool Storage«Paper Towel Holder*One point out what might not be so obvious, Pair of Interchangeable Fuselage. Wing, and that is that any one-design event will or Boat Cradles that Tilt and Telescope probably be set up by the experts of for Field Repairs - Select any two. Combat. Hopefully these experts can Fuselage 2V-3V-5'-6Vir-8 V -9 V -11" look back far enough into where they Wings 14'-16” came from to realize that equipment Boats 6"-1 0 "-1 6 " (models, engines, tanks, etc.) specified (Optional Features Extra) Detachable power in any one-design event must be easy for module case that carries TX-starter power panel •12 v battery and coils starter and glo-clip cords the novice to work with and must also be -519.95 · Clear plastic 10 drawer organizer SB 50 somewhat tolerant of the typical mis­ ADD-ON FOLDING WHEELS $29 95 takes that are bound to be made. Performance can be tailored to suit See your local dealer first the requirements; let's just remember that we also must consider ease of or send for free literature. successful operation. OqC q Any comments about one-design mOOEL PRODUCT/ P. 0. Box 14078, Omaha, Nebraska 68114 Combat are welcome, especially from VI PATENT PENDING anybody who has had experience with such a scheme. Anybody out there ever With the larger models and many CUSTOM TUNED ENGINES have a Flite-Streak-only Combat meet, innovative approaches to engines, re­ COMPETITION ACCESSORIES for instance? · tracts, and other mechanisms being persued, I felt you might like to be Cox, OS Max, Rossi Λ Supar Tlgra Englnas reminded of the range of items they 1 to 1 ...... Continued from page 23 Specialists In custom T.D. 049/05 1 and carry. As an enticement, they have read anginas. Throttled T.D.'s available. spend any more time on that foggy isle machine screws with sizes beginning at Complete Inventory of stock Λ custom parts. off the coast of Europe, but are left on 0000-160, in stainless steel and brass . . . self-tapping screws 000 sizes .. . Esna Hard-to-get Items such as custom needle this continent, south of the Great Lakes. valves, racing wheels, quick fills, elastic stop nuts from 0-80.. . metric size fuel shut-offs, Λ many others. The dates for the competition are July Everything for R/C Λ control line racing. 19-26. The site is the Rockcliffe Airport in screws and nuts . . . taps from 0000-220 and in metric . . . cobalt cutters. . . bear­ Ottawa, Canada. The airport is the 1980-8 1 AMA rules special: property of the Department of National ings (needle, ball and tapered) . . . Goodyear .014 X 60' solid Unes $2.95 ppd. tubing, flat stock, angles, rod, etc., in Defense and is the site for the National For detailed brochure, send 25 cents to: Aeronautical Collection. You have an carbon steel, stainless, bronze, monel, invar, beryllium copper. . . Kustom Krattsmanshlp Box 2699 Laguna Hills opportunity to not only visit the FAI Calif. 92653 Ph: (7 14) 830-5 162 Internats and a beautiful area, but an By now I suspect you have the idea. aircraft museum as well. The materials are premium quality and TOOLS AND STUFF can be obtained in virtually any quantity ON A LONG WINTER EVENING About a year ago I reported that a you desire. Write for further informa­ When you have nothing better to do, company called Caltronic Laboratory tion to Caltronic Laboratory, 461 S. you might want to research some future existed which could provide a number Cochran Ave., Box 36356, Los Angeles, model project that will set you apart of very useful and frequently hard-to- CA 90036. Please note that you heard of from the rest of the bunch. You’ll find items. While the company has them in R/C Model Builder, since the probably have logo to one whale of a lot historically serviced "Industry, Labora­ airplane field is a newer one to them. I of meets to come up against any of these tories, Institutions, and Crafts,” the learned of their line through a live gems. model airplane group is just discovering steamer. (That’s a train modeler, folks, Ca 60 Transaero: Italian design from it. not a clambaker.) 1919, nine sets of wings with a 98-foot

wmg span combined with approximately 4 pound flying weight gives a wing loading of 14 oz per PIPER CUB J3 square foot The J3 kit features quality materials rolled plans building instructions complete hardware package ■Ml Looking for a framer mat looks and flies like an au­ die cut windshield and pre-shaped landmg gear ah thentic plane9 Try Model Engineering of Norwalk s decals included The building time for the J3 kit is 14 Piper Cub J3 a realistic rendition of a popular air­ to 30 hours plane that has a speed range of 8 to 40 M PM The following items are needed to finish the model t The MEN S wmg design gives realistic slow flight and pair 3 ” wheels, motor 29 to 35 motor mount excellent stability Model Engineering of Norwalk s mounting bolts a 8 oz tank fuel line, i tail wheel THRU-CUT die cutting, combined with TRI­ throttle cAbie 1 8 cottars i 16 collars foam saddle SQUARE-IOC assembly m lite plywood balsa and tape glue and covering matena) spruce make construction simple enough for the begmner The inherent strength ot our hte ply con­ struction provides durability and lasting perform­ Now Available A Wing and StabHUer KM for ance You will be spending more time on the flying Men’s Piper Cub J3 List price S 26.95 field and less at the repair bench TRI-SQUARE-LOC enables us to bring to you the best « lite plywood construction This method of squaring straightening, and holding parts m relation to one another revolutionizes construction m tile M.E.N. plywood »■nrtoow----X—1 wcriyEieefTog-----1------J ------iof Λ.· rtorwem------«X- The J3 is designed for three channel radio control operation with a 29 to 35 model engine The 7? inch 54 Chestnut Hilt · No»walk Connecticut 06851

MAY 1980 93 ANNOUNCING A NEW JIM CROCKET PRODUCT LINE

It gives me great pleasure to announce that I now am a distributor tor EMCO-LUX tools and accessories. I have used these tools for over 22 years in my hobby and professional work and credit them for the quality of work and the wide range of products I've been able to develop for my clients. I am well acquainted with their precision and durability and can recommend them without reservation not only for hobby and professional use, but also as an investment. For the past decade, quality tools have app­ reciated rather than depreciated in value. Full color brochures are available describing each tool along with price lists and order blanks. Because these are expensive and not all my customers are interested in the tools, I am not mailing them with each Free-Flight Hard­ ware catalog. If you would like to receive these brochures, please send your name and address, along with $1.50 to cover postage and handling. JIM CROCKET REPLICAS 1442 N. FRUIT AVE. FRESNO. CA. 93728

í WE'VE EXPANDED! \ those interested in the larger model, Well, back to my flying. Keep them how about Hiram S. Maxim’s $46,000 flying! · SCALE DRAWINGS fPH O TO S - BOOKLETS giant built in 1894? (What would it cost today!) Wing area was 4,000 sq. ft., with Pattern...... Continued from page 21 two 18-foot propellers. Weight was / REPLA-TECH 3-1/2 tons. It did lift itself off its takeoff back; the judges will spot it immediately. '^INTERNATIONAL rails, but it crashed. (The ultimate scale CATALOGS $2 00 01900 MC KINZII MWV Also, you will exit at an angle. As you VIOA, OOIOON I708B function!) Strangely enough, further reach the inverted position, release all span. Eight engines of 400 hp each, tests were abandoned. up elevator stick pressure and hit the designed for trans-Atlantic flights. Book (Lest you think I made these up, I ailerons. didn’t say if it ever made it. Prospective suggest you check out a copy of Weird If you watch and practice carefully, builder should own a balsa grove in and Wonderful Aircraft by Graeme you will find that it's best to start the roll South America and buy stock in K&B. Cook from your local book lending a split before reaching level inverted Dornier DO-X: 157-foot span, 12 place.) flight. This should eliminate any dipsy engines, range 1740 miles. Idea scrapped doodles as you roll. (A trick we learned dueto'Mimited height capacity.” Builder In a more serious vein, you might like from former AMA President and FAI should own K&B! to check out copies of two much more team member. Cliff Weirick, many years Supermarine PB-31E: Quadruplane, conventional aircraft books. They are ago. wen). WW-I multi-seater, anti-airship fighter from Crown Publications and theeditors If you are having a lot of trouble with equipped with two machine guns and a are John Taylor and Kenneth Munsion, the Immelman, check these points: 1-1/2 pounder cannon. Scrapped in 1917 whose fame is connected with Jane’s All 1) Has the plane been laterally bal­ due to poor performance. Couldn’t the World's Aircraft. The two books I anced so that one wing does not con­ keep its powder dry, no doubt. have, courtesy of my daughters and stantly drop? some birthdays, are History of Aviation 2) Have you sealed all hinge lines so O ’Neill Pea Pod: Tail-first monoplane and The International Encyclopedia of that lift doesn’t change as you pull up? with pylon-mounted engine at rear. An Aviation. They contain many beautiful 3) Do you have the plane trimmed to excellent choice for the non-flying scale pictures and illustrations (almost 3,000 fly absolutely hands off? NO up or down modeler, since the prototype never between them) and historical data stick pressure should be required for made it off the ground. (Sounds like it which seems to never end. They are not level flight. would be easy to trim out.) inexpensive, so check with your library 4) Is the model balanced properly? If Rotobuggy: From WW-II, standard for a copy to browse through to see if not, it may drop off heading during the Jeep mated to a special aerodynamic tail you’d like it. Even after a comprehensive rollout. This is because as you reach fin and rotor blades. Would glide to speed reading course, it would take a knife edge, the fuselage does the lifting ground after being released from an heck of a lot of trips to your local and a badly balanced model (usually aircraft. Perfect subject for converted bookstore to read them, since between nose heavy) will drop the nose a little. plastic model car buff. them, the 10 by 13-inch books contain 5) Are you using dual rate ailerons? And last but certainly not the least: For about 1,000 pages. You need a lot of aileron power to roll smartly at the top of the half loop, much REPLICA ENGINES more than desired for smooth rolls and presents th e NGK 14X32 ME8 loops. NEW SPARK PLUGS Practice makes perfect, but first, SENSATION of ’41 analyze your mistakes and work out the $5.50ea. R R «« corrections one at a time. It will reward ^TALISMAN .60 you with a feeling of satisfaction you engine castings kit · · · V-3 size HEX ------« won’t forget. · Thread length is half - " way between V-2 & V-3 Cub Mods.... Continued from page 47 Please Include S.A.S.E. could be flown by my 5-year-old. In order to tame the enhanced control when requesting Infoabout response, I used the innermost hole on A n y " reT product. THANKS the servo arm, cut the size of the mov­ 8castings ^drawings · · able rudder in half (the upper half is now S 36.50 postpaid Dealers inquiries invited fixed and only the lower profile is movable). Even so, the model flies nicely Cfll'f. residents add 6 ° /o t a x while using the outermost hole in the REPLICA ENGINES « 1 4 6 0 0 RAM^TAD DR »SAN I0SF,CA9512Z rudder control horn.

94 R/C MODEL BUILDER You are ready to go flying! The exact longitudinal trim will have to be found by experiment. Try the model as is. If it won’t climb well due to the downthrust, add about a matchbook cover shim FLY EL CTRIC under the wing leading edge. If the model stalls in the glide, add a bit of noseweight. Whatever you do, do it only VL-101 Electric propulsion system a very small amount at a time. shown— using Hytork 48 motor and Well, you now have a model which planetary gear box, SJ-3V switch & should recover from practically any­ charging jack, and B-33L fast charge thing your beginning modeler will get ni-cad flight battery— total weight into. It’s back to the days of "If you get in 2Vi oz.—will power models 25 to trouble, let go of the stick and shut your 50" wingspan weighing up to 10 oz. eyes.” Send 50c for latest catalog showing V L PRODUCTS I started out very impressed with the full line equipment & accessories. Division of Vista Labs capabilities of this pre-built model. It Hobby dealers send for information. 7023-D Canoga Avenue proved to be a good trainer in the hands Canoga Park, California 91303 of Pam Miller, a young lady I know. After the modifications, the performance as a trainer is as good as you can get. · as any big surprise that this event wasn’t conducted as a heat race. Like most full- GET ORGANIZED! scale offshore events, the boats ran Here s a set of 4 sturdy files mat holds over Postal...... Continued from page 28 4 years of you· favorite 8V| * 11 magazines about 150 miles all over the ocean and 4 MAG FILES $4.95 average will get better, but I don't came back to the finish line. Send S4 95 plus St 00 expect it to double. Here's my point: deep-vees shouldn’t for postage and handing to DOM INDUSTRIES Our winners were: race heat races for records in an event P.0 BOX 388-G DURATION MAX SCORE % OF called “ Deep-Vee.” If a deep-vee can DOVER. N.H 03820 = 2433 PERFECT establish a record in heat racing, that’s Trey Wood, fine with me. I just feel it’s time we 2) The engine must meet the specifica­ Mobile, AL 2363 97% started recognizing that Deep-Vee or tions of A, B, and C engines as stated in Clell Dildy. Offshore Racing Class should be some­ the NAMBA Rulebook; 3) The race shall Panama City, FL 2292 94% thing different than just another “ whip it be at least three (3) 5-minute enduro Melvin Duval, around the buoys for .9 mile” event. type races employing a countdown start. Pensacola, FL 2274 93% If you’re one of the people who gets The course shall be irregular in shape. It Don Olson, tired of hearing how NAMBA District 8 shall have at least one left turn in the Metairie, LA 2251 92% did something, you’d best skip to the front chute; and 4) Special rules: a Henry Waltman, next topic area. "Letters From Readers.” stand-off scale appearance is required, Mobile, AL 2240 91% In 1979 and again in 1980, NAMBA paint schemes are to reflect an attempt R/C HLC to make the hull appear like a full-scale Melvin Duval 1st District 8 decided to attempt to conduct a Deep-Vee event that wasn’t an ex­ boat, drivers are required, and no Don Olson 2nd retrieval of boats will be allowed. Rae Fritz 3rd tended heat race. The guidelines were Trey Wood has been in modeling for drawn up by Bill Hornell and adopted by I raced in this event with a .21 and .40 only one year. The contest was well the district at a regular district meeting. size vee last year and really had a good received with 21 entrants and I know by The rules are as follows: 1) The hull must time. Having to makesome left turns put name at least ISothers who will fly in the qualify under those rules covering a new wrinkle in model boat racing out next one . . . now that they know what Deep-Vees in the NAMBA Rulebook; this way. It made for very exciting races. they are missing. I must give the San Fernando Valley Silent Fliers credit for an international CANNON NOW - IT’S postal contest held about eight years " -----R/C SYSTEMS ago, but it suffered from being too large i 7 and taking too long from invitation (or WORLD'S SUPER-MICRO! announcement) to award mailing. SMALLEST Why not give it a try? · & WORLD'S SMALLEST R/C SYSTEM SERVO At only .4 7 o z ., the SUPER-MICRO Servo ■ makes this system possible. Flite packs Power Boats . . Continued from page 49 compatible with most R/C AM Tx of other Offshore racing, where a number of makes. Servo available separately, works boats race a fixed distance.” The rule with all positive pulse decoders. goes on with more information, but the : 2 C H . 3 C H . 4 C H . phrase “ to simulate full-scale Offshore $224.95 282.95 339.95 racing” is the key to my contentions. It should also be pointed out that a similar FLITE $159.95 197.50 statement is found in the IMPBA Rule- 234.95 PACKS: (3.14 o z.) (3.65 o z.) book pertaining to Offshore Racing. (4.16 o z.) I don’t know how many of you have 29/64X 31/32X 1-3/32" ever witnessed a full-scale offshore race, Thrust 15 o z .-in . - but I had that opportunity during August $47.50 of 1975. I was visiting with Steve Muck when he lived in Los Angeles. Steve Complete Brochure - .50 in U .S . (1.50 Foreign) arranged for us to observe the 1975 For Shipping add $4.50 (Systems); $3.00 (Flite Packs); or Marina del Rey/Hennessey Cup from WS4 $2.00 (Servos). 20% deposit req'd on orders. C o lif. residents one of the press boats covering the race. I odd sales tax. Dealer and Distributor inquiries invited. It was a fantastic experience and one I’ll not soon forget. I’m sure it doesn’t come I 13400-26 Saticoy Sir··! North Hollywood, Catif. 91605 Phon· 1213) 764-1468

MAY 1980 95 most important goals for 1980. To ac­ complish this goal, he has appointed national and district chairpersons for Offshore Deep-Vee and Deep-Vee Enduro to attempt to resolve the prob­ lems in the event. It will be most inter­ esting to observe the progress of these groups during the following months. Theirs will not be an easy task. Hope­ fully, some of these issues can be ad­ dressed and resolved. LETTERS FROM READERS Harold P. from Butte, Montana, wrote, "I recently purchased the wooden version of the Dumas Hotshot. Before I start construction I thought I would ask you for your ideas on any modifications you may have seen.” I have seen a couple of valuable modifications made to the Dumas wooden Hotshot that can be relayed. The first modification that seems to help is relocating the radio equipment farther forward than what is shown in the plans and directions. This can be accom­ plished by cutting open the bulkheads in front of the suggested radio compart­ ment and moving everything farther forward. The second modification that nd the spectator appeal was greater has proven very effective is cutting air than the 10-minute race around a regu­ vents in the forward part of the center lar oval that we had done in the past. The section. This bleeds out some of the air handling characteristics became just as going under the hull and seems to important as top-end speed. The need improve the riding characteristics of the to make left turns placed increased boat. The information on this modifica­ demands on driving techniques. The tion is shown in the sketch. required drivers added realism to the Roger S., of Des Moines, Iowa, in­ boats and didn’t slow the boats down. A quired, “ I am a new boater, but have diagram showing a typical course has been very active in R/C airplanes for been enclosed in this article. The course over 10 years. The last 5 years have seen is based on the NAMB A .9 mile competi­ me very active in all forms of pylon New from Iro^tor tion oval using five laps. We didn't use racing: QM, Q-500, Form 1, etc. The 1/4 SCALE the exact same course each time, but for point here is that I have quite a number purposes of records it could be stan­ of engines that would be right at home 1918 NIEUPORT 28 Cl dardized. in a boat if only the exhaust pointed the For additional information on this W.W. 1 Classic and our NAMBA’s new president, Stuart Rus­ Catalogue, send $1.00 to PROCTOR ENTERPRISES. CORP. right direction! In several of your col­ P.O. Box 9641. San Diego. CA 92109 sell, has stated that resolving the prob­ umns over the years, I have seen pictures lems in the Deep-Vee class is one of his of your own boats with a nice, neat bit of plumbing to couple the front facing exhausts to a pipe. A U-bend is what it MAKE 1980 YOUR appears to be. As you commented in one column, it’s nice to have the pipe off R/C HELICOPTER YEAR to the side, out of the way of the starting belt. "M y question is a simple one. Where BUY A SCHLUTER did you get these pipes? Are they a commercial product? Does someone HELICOPTER FROM make them to special order? If so, who? THE R/C HELICOP­ "Oh yes, being new to boating, I built TER SPEC!A LISTS— a Deep-Vee. But it just didn’t quite ‘turn me on,’ not at all like Formula I racing! • HELIBABYS So my next boat is a rigger. It’s like learning everything all over again, but • HELIBABY IPs it’s exciting.” • H E LIB O YS The U-bends that I use on my .21 and ALL IN STOCK NOW .40 K&B engines are fabricated from copper plumbing fittings found in LATEST: THE NEW plumbing supply outlets. It is necessary SCHLUTER BELL JET to make an adaptor plate to bolt onto RANGER FUSELAGE. SEE US A T TOLEDO. the exhaust flange. The U-bend tubing is then silver soldered to the adaptor pipe Call or Write ft S.C M ODELER using high temperature silver solder. S.C. Modeler, the *m HOBBY SHOP (With the rapidly escalating price of R/C Helicopter Experts, Helicopters. Planes. Cars Boats Radios Or See Your Local Dealer Paris for RC Hobbiests silver, I understand the price of silver 1999 Larkin Avenue, Elgin. Illinoi· 60120 solder is getting quite expensive.) Al­ Dept. 120 ______312697.3737 though Ron Erickson made my exhaust ______y headers, I have seen many made by 96 R/C MODEL BUILDER model boaters without a great amount of experience in the hobby. The secret is getting a good solder job. In some cases, two 90-degree elbows are silver soldered together to get the U-bend. PROPELLORS HAS ANYONE OUT THERE BUILT AND RUN AN EXCALIBER II 2J0I8 S NCWMANOíř AV£ TO*t*ANCC CA WVl? PHONE 213*39 2313 FROM THE PLANS IN RCMB? OUR PROPELLORS ARE DESIGNED AND I’d be greatly interested in receiving ENGINEERED FOR MAXIMUM THRUST photos and reports on any Excaliber II AND EFFICIENCY. outboard tunnels built from the plans featured in the December 79 issue. These can be sent to: Jerry Dunlap, 119 NO REWORK NEEDED TAKE THEM OUT Crestwood Dr. S.W., Tacoma, WA 98498. OF THE PACKAGE AN D PUT THEM RIGHT And remember, this column is always O N THE AIRPLANE. looking for contest reports, pictures of boats, opinions, and comments. · NEW SIZES!! * Peanut...... Continued from page 55 the gear should be extended at least half Dia. X 5, 6, 8 Pitch an inch. I personally prefer the low- Dia. X 6, 8, 10 Pitch slung, racy look of the prototype. * * * The wheel pants really add class and can be built from balsa or vacuum A V A IL A B L E IN THE formed from plastic. I used balsa wheels FOLLOWING SIZES: purchased from Oldtimer Models. These balloon type wheels can be easily sliced PITCH D IA. PITCH at the center and sanded on a block so 6W, 7W 5, 6, 7, 7.5. 8 that the assembled wheel is slimmed > 1 down to scale. A neat trick for forming 4, 5, 6 H the wheel struts is to roll moistened 1/64 4. 5. 6. 5, 6. 8. 10 sheet to an airfoil shape and pin down 5. 6, 8. 1 0 f until dry. Pry them open, coat the inside 6. 8, 10 v t with Titebond, and set into position 6, 8. 10 around the wires. The pilot’s headrest is 6, 8, 10 made the same way. The pilot is carved from polyfoam ★ ★ ★ ★ ★ ★ ★ ★ ♦★ »★ ♦♦★ ★ ♦A************ plastic, one of those small curlicues you find in cartons as packaging material. spray coating. This material is used to Floquil on Sig decal paper. When soaked Paint with acrylic tube colors, mixing a preserve artwork, such as charcoal in water, the paint skin remains fully small bit of burnt sienna and white for a drawings, and is ideal for our purpose. pliable and slides off for perfect appli­ flesh tone. Finish with a bead of 5- The windshields must be masked or the cation on the model. minute epoxy for the goggles and a spray will make them cloudy. Spray a As a final detail, small blobs of 5- touch of Floquil silver. Make sure you small puddle on wood scrap and brush minute epoxy were used to simulate don’t get dope or Floquil paint on the the coating into the smaller spaces or wing and taillights. Plastic model paints polyfoam. touched-up areas. The results are quite provided the tiny spot of color needed. Sand and dope the framework and impressive. ASSEMBLY AND FLYING cover with condenser paper. Cover the A No. 2 red sable brush is very expen­ By this time, let’s hope you tried the fit sheeted portions by applying the glue or sive, but certainly a worthwhile invest­ of the lower wing in the fuselage. Cuts dope to the border areas only. Shrink ment in your hobby if you want the and adjustments are more difficult after the tissue with a fine mist of water and satisfaction of great detail work. As you the finishing stage. Aside from this, the set each piece aside for finishing. It’s gain skill in working with this brush you most difficult part of assembly is the much easier to do the finishing prior to can expand on the details you wish to attachment of the upper wing. Begin by assembly. include on your models. If you print cutting a balsa or plywood template with FINISHING neatly with a pen, you can learn to do it fou r holes to match the basswood inserts Now’s the time to hunt up the Decem­ with a No. 2 brush and Floquil. The on the cabane struts. Cement the struts ber 78 and January 79 issues of MB. I Standard Oil of California fuselage to the fuselage and carefully center the know you have them, because no dedi­ stripes and eagles were duplicated with template. When the cement is set. cated subscriber ever throws away a copy. You’ll need the scale drawings and tw o more classics «s e e y o u r l o c a l h o b b y d i-a l e r · photos for the details and little touches from Flvlinc ,,,, of authenticity. Multiply the Westburg drawing measurements by 1.37 to scale up to Peanut size. A small calculator is handy for this. The sight of sunlight glinting through Γ ΰ νν · v. a tissue-covered frame may be a free 1/- Scale Λ Α ι single channel r/c g k a W W $15.95 f lighter's dream, but it’s not scale realism. or ·— Scale model aircraft finishes should be as close to opaque as possible. For the most 2-4 Ch. RJC A J P 5 H -049 Power f,* ht part, Floquil paint fills the bill. It covers 39" Wingspan FLASH ·*** beautifully in one coat and is fairly dense, yet light. Floquil dries with a flat finish, however, so an additional step is FLYLINE MODELS, INC. necessary to obtain a semi-gloss or gloss Farman Moustique Tz surface. My solution is to use acrylic (7031571-2038 MAY 1980 97 American team. Then I'd build a 24-volt self-retrieving COCKPIT winch, like the Austrians use for speed practice, and I’d wear out at least one set of batteries practicing speed and dis­ INSTRUMENTS tance (but mostly speed) every weekend 1/4 SCALE FOR POWERED between now and the semi-finals, AIRCRAFT & SAILPLANES weather be damned. And I’d start put­ • Full Color Dial Faces ting a lot of thought into my compe­ tition launch system. • Detailed Bezels with Clear Lens Once this sort of team has shown up at • Easy to Assemble and Install the Finals and blitzed their way into first, second, and third .. . and I hope it Avaitebte at your favorite dealer happens this year.. . we’ll be on our way MIDWEST MODEL to restructuring our selection process. What we’re ultimately going to need, to SUPPLY CO. stay competitive as a country, is a “ team BOX 518R ROMEOVILLE. ILL. 60441 selection finals” that does just that: 312-759-1955 selects the best of maybe ten or twelve three-man teams who enter from dif­ remove the template and attach the don’t want to risk the third time just yet, ferent parts of the country. Guys who fly upper wing, cementing it at the proper the4E now sits in my son’s room, holding together, practice together, maybe even incidence angle. The interplane struts its own in the company of some fine design and build together the way the are installed in pieces. First bend the (ugh) plastic models. · Austrians do. Such people are always basswood strips into place, then add the going to have a tactical advantage over a group of three guys who are separated 1/32 balsa sections. Sand, dope and FAI Soaring . . Continued from page 27 paint silver (for the Standard Oil of by thousands of miles, and get together California version). pressure was on. for two expensive, hectic, 10-hour Flying should present no unusual If I were making an assault on the ’81 practice sessions before winging off to a difficulties. The model has good propor­ Champs, I’d start putting my team World Champs together to represent tions and looks great in the air. Experi­ together right now. Ideally, I’d pick two their country in a competition that’s ment with different motor lengths. I’m other philosophically compatible pilots getting tougher and tougher, more and going to try some Pirelli when I get it, as to team with, and then sign on at least more team-oriented, and less and less my luck with the wind-up has been two non-flying helpers as well. Within hospitable to Lone Eagles. disappointing lately. It should be noted this five-man team I’d start to build a The question is, how much indivi­ that the Stearman has withstood two fanatical esprit de corps, an absolute duality is it necessary to give up in order motor breaks with no skin or fuselage determination to put all three pilots (and to compete at the very top of a sport that damage by the flailing rubber. Since I both helpers, of course) on the next is, at the grassroots level, a sport of loners and individualists? And the an­ swer, like most good answers, is another question: Flow badly do you want to win? ·

Clubs...... Continued from page 50 the job. It should be kept in mind that certain people enjoy doing a particular thing and are complimented when they are -NEW- asked to do it again. A mild complaint HEAVY DUTY ELECTRIC RETRACTS should not be read as outright rejection • LIFTS A 4 - WHEEL ON A 10" STRUT (Om«. To Cwit«rl of the job; frequently, the encumbent is • HEAVY-DUTY SLIP CLUTCH PREVENTS JAMMING • LARGE TRANSMISSION GEARS too polite to appear eager to be reap­ • 3/16" WIRE STRUTS pointed. Do not let the old complaint • WILL HANDLE WEIGHT OF AN 11 TO 20 lb. AIRPLANE that the same people do all the work • SLOW. SCALE TRANSIT TIME. 5 SECONDS make you lose the talents of someone • POSITIVE MECHANICAL UP AND DOWN LOCKS who does a good job and enjoys it. Some GMP-230 Threegear set ...... $110.00 people are competitors and some peo­ G M P 23I Tnogear s e t ...... S79.95 ple like to run contests. And once you GMP-232 Nose gear o n ly ...... « 6.00 have learned how to run a contest well, it is a shame to put a new person in charge who has to learn the ropes from -NEW- the beginning. Rather than replace a GIEZENDANNER SOLID STATE AMPLIFIER man who is doing well, see to it that he /SWITCHI gets the help necessary to make hisjoba • LATEST 1C SOLID STATE CIRCUITRY • ALLOWS USE OF SEPARATE BATTERY SUPPLY pleasure! • ELIMINATES ADDITIONAL SERVO. SWITCH. OR To be sure, a talented group of or­ HARDWARE • PLUGS DIRECTLY INTO RECEIVER AUX. CHANNEL ganizers will end up doing most of the • CAN BE ORDERED FOR POSITIVE OR NEGATIVE work. How many talented auctioneers PULSE INPUT SYSTEMS can you find in one club? The best way to • CAN BE USED AS A GENERAL PURPOSE ELECTRONIC SWITCH FOR LIGHTS. ETC. reward these people is continued recog­ • NO RFINTERFERENCE nition by the club. Should not the • ONE AMPERE SWITCHING CAPABILITY • SMALL SIZE 11-9/16 x 1-3/16 x 15/16 inch«! Contest Director get an award along w r it e f o r c o m p l e t e r e t r a c t , c o m p o n e n t . • LIGHT WEIGHT (LESS THAN 1 OZ.) with the competitors? How about a AND PRODUCT INFORMA TION. $3 4.9 5 standing round of cheers for a com­ Pennsylvania residents add 6* state sales tax. YES. WE H A V E GIEZENDANNER WIPERS mittee’s work? Enthusiastic praise by the President for a job well done is always in

98 R/C MODEL BUILDER WE, THE PEOPLE OF THE UNITED STATES, IN ORDER TO A FORM AMORE PERFECT

DEALER INQUIRIES INVITED ZAP REVOLUTIONARY SUPER GLUE SUPER STR O N G . . . SUPER FAST. . . SUPER CLEAN AND EASY TO USE! 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 Get revolutionary SUPER ZAP at your hobby dealers.

order. How about rewarding the Presi­ arranged for future meetings. A better make viewgraphs will make your pro­ dent with a dinner out for him and his way is to determine what would be of grams easy to prepare and enjoyable to spouse? interest and then go looking for a listen to and watch. The cost of view- Many clubs suffer from the presence speaker from inside the club or from graph materials is small today and many of a member who makes things unplea­ outside. It is surprising how many peo­ businesses have projectors that can be sant for the other members. Typically, ple are pleased when asked to speak. borrowed with a little finagling. he may monopolize the meeting time, The availability of a movie projector is an A great place to find subject matter for insist that his subjects get first priority, asset. Even better, the availability of a meeting discussions and presentations is criticize even those who are doing a viewgraph projector and capability to to review the magazines that publish great job, fly dangerously at the club field, or he may do any number of things that set the general membership on edge. An interesting solution to this problem has been devised by one club. Their experience over a couple of years indicates that it effectively solves the “ Joe Obnoxious” problem without resorting to kangaroo courts or parlia­ mentary means of solution. Their method is quite simple: require each member to be sponsored by another member each time he renews his mem­ bership and when he joins initially. Even the meekest member thinks twice be­ fore he sponsors Joe Obnoxious, realiz­ ing that if he does, he may not get a sponsor himself the next time around. If you expect any problem with two ob­ noxious members who could sponsor each other, require two sponsors. Clubs function best by minimizing the business conducted at meetings and by featuring a presentation that is of inter­ est to the members and in keeping with the club’s purpose. A frequent mistake made by Program Committees is to re­ view the membership rather than the subject matter to see what can be

MAY 1980 99 better diesel, too. The punch line is, “ There ain’t any free lunch.” Diesel isn’t VES-SIR, YES-SIR. THREE ΒΑΟβ FULL I V synonymous with miracle. BRICKBAT OF THE 70’S AWARD If you listen to me very long, you'll find that I usually take the side of the engine manufacturers when someone gripes about prices. Basically, model engines are a real bargain, and I suggest that anyone who wants to dispute that point should try to build one himself. WALT MOONEY NOW OFFERS 3 BAOS OF PEANUT SCALE PLANS (The exception I’ll occasionally make is, ALL WELL tested DESI0N8, AT ONLY tS.OO EACH “junk at any price is still junk.” ) Who should I name as recipients of EACH BAO FEATURES FOURTEEN PEANUT PLANS, the “ Brickbat” award but the brothers ONE OTHER, PLUS PHOTOS ANO INFORMATION Rossi. They can take pride in having built SENO ÍI.0 0 FOR COMPLETE LISTINO AND SAMPLE PLAN TO: the best (in design and construction) WALT MOONEY, 2912 CABRILLO MESA OR production .15 engine of the 70’s. But they deserve to be run out of town on a SAN DlEOO, CALIFORNIA-92123 rail for making many of those engines too large for legal competition. not have a person who will accept the I had personal experience with the 9 H.L. GLIDERS job on a long-term basis; this type of “ large” Rossis, as they sent me two pre- 3 S A T E L L IT E K IT S production diesels in 1974 (prior to the [KITS 7 OLD TIME GAS talent is not easy to find. The newsletter Send 25« for 5 R U B B E R . 3 NORDIC is best omitted if it is not done well. C/L World Champs in Czechoslovakia), 1980 catalog 9 COM PETITION GAS CONCLUSION which I found to be oversize. A letter to F U E L and DT TIM ER S - $10.25 each Good organization, a well adhered-to them in the fall of ’74 discussing this F. A .I. Model Supply purpose, and minimum debate make for condition brought a denial of its possi­ 1 % P O BOX 3957 TORRANCE. CA 90510 a healthy club. Enthusiasm is the real bility. However, a package did arrive spark. This can be provided in large later with two crankshafts which had a measure by actively recognizing jobs reduced stroke. A Unique Catalog well done. Don’t wait until the wheel The first disaster that I know of oc­ tf'SSSSn . squeaks. Use plenty of praise as a lubri­ curred at the 1976 C/L World Champs 200 pages cant! · when the Swedish team of Larsson/ «4.95 Rylin lost their 2nd place in Team Race 314 Fifth Avervie due to an oversize Rossi. The latest New Yori NY 10001 Fuel Lines. . . . Continued from page 25 major incident was the disqualification (2121 BR9-9035 lightest approach. of Doug Galbreath at the Taft F/F World Champs last fall. material of interest to your club. Do not It seems that the diesel conversions Of less devastating importance, both are being promoted as capableof swing­ be afraid to stray somewhat afield of Cliff Norman and Bob Hemingway were your immediate purpose; a talk by a full- ing a bigger prop than the glow engine. DQ’d at the FAI Speed Trials in Dayton in scale pilot would be most interesting to However, I wonder if it’s true. Remem­ 79. That they were not in the top three most model airplane enthusiasts. A ber, if I allow you to bolt on a diesel places hardly matters. In the ’76 case, couples’ night is always in order at least head, you have to allow me a new glow Rossi claims that examination of the once a year; combine it with a catered head. I’m sure that the glow can be engine in Italy by a certified laboratory dinner and it is money in the Peace-on- modified to produce more power at found the engine to be within the 2.5cc the-Home-Front Bank! 7,000 rpm, if that is what everyone limit. Regardless, it is foolish to push the In most clubs there is a person with requires. limits to the point that officials of normal some writing and editing talent whocan The fact is that the manufacturer ability, using conventional means,could handle a newsletter. With costs being designed and built his engine to operate find the engines to be oversize. what they are, make sure you can afford under a given range of conditions. If you It is unconscionable that a modeler the printing and mailing costs. Better operate outside that range, such things can buy an engine or even assemble an still, use the finagling technique again; as the cylinder timing, intake valve engine using all factory parts and have many businesses are very tolerant if the timing, and the head configuration that engine found to be of illegal dis­ cause is a decent one. In any case, it is probably should be changed. Of course, placement. The potential power advan­ best not to attempt a newsletter if you do the engine could be redesigned to be a tage gained by crowding the displace­ ment limit is trivial when compared to that gained from a better-than-average TREAT YOURSELF TO A piston/sleeve fit. It is accepted that in a sample of engines, some will perform CUSTOM BUILT better than others, but be illegal? Never! TIPORARE So for all those DQ’s and scrap parts, by DICK HANSON Rossi, here’s to you. · Our custom built airframes are used by many of the country’s top pattern fliers. For example, we furnished Letters...... Continued from page 7 basic components for 1/6 of the mod­ and Fla bob. els flown in the 1979 Masters Tourn­ Hope the above can be ol some use. It mould ament. Some were TIPORARES, some were not. be great it a directory could be built up and kepi Building pattern birds is a business current, with your subscribers acting as w ith us, not a sideline. We can save stringers so there mould be a good source. you considerable building time by providing you with good, basic Sincerely yours, construction. Jack F. Sweeney Write or call us concerning your La Honda. Calitornia requirements. We w ill be happy to Dan Lakenmacher's letter has stirred up 5269 Lucky Clover La. review them with you and quote Murray, Utah 84107 prices and delivery. considerable response, witness the above. We published Sweeney's letter because the

100 R/C MODEL BUILDER H O B B I E S + # Wanderer Glider 72" # Futaba 2-Channel Radio FP-2GS # 6 Foot Roll of Monokote (You pick the color)

HOBBIES + Mailorder Service for: HOBBYCRAFTS Half-mile east of Colima, P.O. Box 1342 JACK S on W hittier Blvd., in the W h ittie r, Whittwood Center - (Next to Von' s) California 90609 » OVER 25 YEARS IN WHITTIER « Whittier, California 90603 Phone (213) 947-1710 FULL SERVICE Write for FULL DISCOUNT Catalog $3.00. Price refunded with order for $25.00 or more. 24-hour service on all orders. format of naming the museum and its site, in western Canada. Although my main interest is in small scale plus giving a brief description, isagood one Western Development Museum of Transpor­ and sports models. I very much appreciate the to follow. As promised in the March issue, tation. Moose Jaw. Saskatchewan has a overall coverage that you provide in R/C we will compile a list, trying to break it down collection of aircraft, automobiles, and loco­ Model Builder. It’s a thorough page-by-page by states as new ones come in. The more of motives. read the minute the magazine arrives. you we hear from, the more complete the Assiniboia. Saskatchewan A Mr. Wheratt is With particular thanks to Bill Hannan, Wall list. restoring a Lysander. a Fleet Finch, Barkley Mooney, Fernando Ramos and Bill Noonan Here are some other listings from Cam Grow, (Serial No. 1) Fairchild 24, Lockheed Yours faithfully. Pringle, Edmonton, Alberta, Canada. Lodestar, etc, Located just west of main runway John Birme Air Museum. Rockliffe Airport near Ottowa, at Assiniboia Airport. Gloucester. England as well as the Canadian War Museum and P S Ret page 93 "Coals to Newcastle" if Canadian Science Museum, in Ottawa All Bob Boehme gets in touch with John Oliver of feature restored World War I and II aircraft. Dear Mr. Northrop, "Oliver Tiger" tame he will get the best Brit Ontario Science Museum Excellent collec­ "Free Flight" . Mystery model competition, diesel made Handmade, not advertised, and tion of museum quality model ships and aircraft It was a very pleasant surprise to receive the with a waiting list . but very worth the wait Museum of Science and Industry. Chicago, February copy of R/C Model Builder this Contact John Oliver (Engineering). 248 Illinois Small collection of lull-size aircraft morning and find that I've got a year’s free Ringwood Rd.. Ferndown. Dorset. England Western Canada Aviation Museum, Winni­ reading ahead in fact a great appeal to Tiger Cub 1 5cc Tiger 2 See. Tiger Major 3 5cc peg. Manitoba Collection ol early aircraft used anyone ol Scots ancestry

R/C MODEL BUILDER . ΤΓ i R/C MODEL BUNDER R/C MODEL BUILDER ( ] 1 111 R/C MODEL BUILDER R/C MODEL BUILDER tf A j| T R/C MODEL BUILDER

\ (BUT STILL GOODIES!) -j-

MOST BACK ISSUES OF "MODEL BUILDER" ARE STILL AVAILABLE, THOUGH SOME ARE IN SH 3RT SUPPLY. ORDER NOW, WHILE THEY LAST! PRICES VARY ACCORDING TO QUANTITY REMAINING IN STOCK. NOTE SPECIAL ANNIVERSARY PRICES LISTED BELOW! r ...... Apr. 75 2.001 I SPECIAL II! \ May 75 3.001 I Jun. 75 1.251 I Put a check mark ( ) by the back issues you MODEL BUILDER MAGAZINE'S j Jut. 75 · 1.251 I wish to order. Magazines will be mailed by Sec­ ond Class, postpaid. Foreign orders (except • ANNIVERSARY BACK-ISSUE SALE I I \ Aug. 7502.001 ) Sap. 75 01.251 I Canada, Mexico, FPO, APO) add 3(ty per copy. Oct. 75 01.251 ) • ANY ISSUE MARKED WITH " o" 75 Cents! Allow about four weeks for delivery. If United Nov. 7501.251 » Parcel Service (UPS) is desired, add S04 mini­ • ANY ISSUE MARKED WITH " · " 50 Cents! Dk . 7501-251 ) mum for up to two magazines, or add 80 4 plus Jan. 76 01.501 ) 1(ty for each additional magazine on orders for Fab. 7601.501 ) three or more. Send check or Money Order (no Nov. 71 S3.00I ) May 7301.001 ) Apr. 74 01.001 ) Mar. 76 01.501 ) cash, please, and no COD’s). A facsimile of this Dee. 71 2.001 1 Jul. 73 «1.001 ) May 74 1.001 ) Apr. 7601.501 ) order form may be used. Aug. 7 3 « I.OOt ) Jun. 7 4 « 1.001 ) Jun. 7601.501 I Jan. 72 01.001 1 Sap. 73 «1.001 ) Jul. 74 01.001 1 Jut. 76 01.501 ) N a m ·:______- — Oct. 73 «1.001 ) Aug. 7 4 « 1.001 ) Aug. 76 through M/A 72 #1.001 1 Nov. 7301.001 ) S/O 74 «1.001 1 Juna 78. 1.501 ) A d d re tt: May 72 2.001 > Dm . 73 «1.001 ) Nov. 7401.001 1 July 78 Sold Out Jun. 72 3.001 I Dk . 7401.001 I •Aug. 78 to date 4.001 1 C ity :______State Jul. 72 Jan. 74 01.001 ) Jan. 75 02.001 1 each 2.00 ( ) F/M 73 2.001 ) Fab. 7 4 « 1.001 ) Fab. 75 2.001 I •Nov 78 Sold out Apr. 73 3.001 ) Mar. 74 01.001 ) z i p :. Mar. 75 2.001 ) PLEASE PRINT / M ODEL B U ILD E R , 621 Watt Nineteenth St., Cocta Mata, Ca. 92627

101 M A Y 1980 we have not been able to find Roy Clough. If UNIVERSAL anyone knows of his whereabouts. Los Angeles or otherwise, let us know and we’ll BYRON EXHAUST check to see if he wishes to receive cor­ ORIGINALSu s 7 y respondence. · ;m fc< Mi U r* b·* S»»S HEADER for .60 size engines C o u n te r...... Continued from page

— > high and comes completely assembled /Use this template\ and ready to run. All mounting bolts and f to check if adapter! universals are included. 1 will accommodate! your .60 size engine. Sounds to us like a good way to cut down on the considerable cost of run­ ning a temperamental racing .60 while at the same time enjoying the reliability Whether you’ re into boats or planes, and ease of operation that a large the new universal exhaust header from Byron Originals is the answer to your ignition engine offers. Retail price on special exhaust requirements. Here are Assembly includes: 2 piece clamp, cap the Super Drive is $100. Optional cable a few reasons why: screws & lockwashers. 4 cinch straps, cast * Adapter can be either drilled to match engine hole aluminum adapter. 6" straight pipe. 90 connectors for 3/16 or 1/4-inch cable pattern or strap mounted degree curved header I4“ x6” and two are available for $5.95 each. * Adapter w ill accommodate most side and rear silicone sleeves. Also new from Aeromarine is a new exhaust engines * Header pipe can be trimmed to ochieve maximum Factory Direct $ 1 6 .9 5 type of stuffing box for flex cable drives. tuned efficiency when used in conjunction with It consists of a thinwall brass tube with an most commercially produced tuned pipes plus $1.10 shipping & handling internal teflon tube liner, a combination • Large throated, non-restrictive exhaust adapter ($2.30 shipping costs for foreign orders.) ensures optimum engine performance. (Prices subject to change w /o notice) that provides a rigid, almost friction-free • Header pipe can be rotated a full 360 degrees at Iowa residents add 3% sales tax adapter unit. The stuffing box will handle both • 3% ” -5 % " lateral adj from glow plug to centerline Send check or money order to Byron .150 and .187 flex cables. It comes 12-1/2 of pipe Originals. P.O. 279 . Ida Grove, la 514 45. inches long and can be cut and bent as NOTE: Exhaust adapter will not accommodate the Visa and Master Charge also accepted. O S VF, HB and rear exhaust O P S. engines required. List price is $6. From Aeromarine Enterprises, 709 To Ron Roberti ... in brief.. . another, we are modelers fortunate to have Longboat Ave., Beachwood, NJ 08722.· I have to admit tha 11 had to learn to fly R/C the interest and need one another regardless ot before I could learn to trim a Peanut Scale whether we're RC’er. Free Flighter. Control Plug Sparks . . . Continued from page 37 model, which I think is the ultimate in model Liner, Indoorer. OuarterScaler, etc. etc. etc. We flight. In lad, go to any indoor or tree flight meet need to stick together. After all the family is no! a cockpit, put in gull wings, and in­ here on the East Coast and I’ll bet hall the fliers that big creased the fin area slightly. there are R/C fliers Mr. Roberti, we real model Happy landings, Gordon has powerea the model with builders do it ALL Joe Beshar a McCoy .35 glow engine using an Thanx, Oradeil, New Jersey Austin timer located in the head and the Ed Baltera exhaust cleverly coming out of the eye. Absecon. New Jersey .. And so, on to other things Color is black, yellow, orange, red, . Well, keep up the good work, and I don't Dear sir, green, and corsair blue. (The photo care it you pul (R/C) on the cover as long as I would like to lind Roy C Clough Jr. Roy was you keep free flight inside and alive. shows it before painting.) Wow! The a model designer and had several designs feather outlines were done using felt-tip Yours truly, published in the old Air Trails magazine Russ Backer pens and a paper pattern. Mr. Clough lives in the Los Angeles area, and Codding runs a small plan service for Orange. California I don Ί know it he is still active in model airplane Dear Bill, Old Timers located at 3724 John L. work or not Avenue, Kingman, AZ 86401. He has Just got through reading "Three il by Air" I would like to correspond with him on several February issue referring to the letter from quite an assortment of plans, ranging Ron Roberti and others about the sub/ect /ust of his designs from full-scale drawings of WW-I air­ turns my stomach Maybe someone in your office may remem­ planes such as the SE-5, Sopwith, etc., to ber him and his work back in the 5Os Who cares what you call your magazine? I would appreciate your helping me finding a selected group of Old Timer gas Just keep up the good quality as in the past him models. Gordon is always trying new Who cares what area the aero modeler Thanking you, ideas such as converting old gas jobs to participates in as long as he enjoys il and does Harry W Hess rubber, making biplanes out of standard it as well as he can Mt. Vernon. Indiana monoplanes, and drawing up planes like What we should care about is being critical ot those that appeared in the old Bill one another and propogating separation. For Barnes pulp magazines. God's sake, let's extend our energy toward We also recall quite a few of Roy’s de­ togetherness and good fellowship and stop signs in Flying Models magazine, particu­ Photo No. 11 shows RCMB’s Phil bickering, which only destroys. Support one larly, his many out-of-the-rut aircraft. So far. Bernhardt’s entry in the Texaco event, an Ehling Contest Gas Model. Notice the snarl on this airplane to match the snort of the Anderson Spitfire. No fooling! “SERIES FIFTY” Old Timers The model really does perform superb­ FREE FLIGHT ο» RADIO CONTROL ly. Its ability to fly in extremely tight circles has led to more than one win on days when the lift was spotty. As if Phil vr JMK >M SO. IN. — didn’t have enough to do as Assistant UACMINCI) u CUT not. PARTS Editor of R/C Model Builder, he is the fORUlO LANDING Cf AH PARTIAL R/C MAPO·ART TOP CRADC SELfCT BALSA new Editor of the SAM 49 newsletter, 1938 POWERHOUSE OCTAIUO FULL SIZE PLANS PRINTEO ASSEMBLY INSTRUCTIONS The Arcing Point. Like the old saying SPECIAL ELECTRIC INSTALLATION INSTRUCTIONS $39.95 goes, “ If you have a job for someone, •EXCELLENT R/C TRAINERS- never give it to the guy who isn’t doing 1939 NR TRAILS SP0RSTER anything. Instead, give it to the guy who $39.95 is real busy; he’ll work it into his sched­ ule somehow.” m s w m m ® ® $ l « © m s & pj? Om Ik RAd DMtnOuto* loqui»··» Invited For those interested in obtaining The 102 R/C MODEL BUILDER Arcing Point, write to Phil Bernhardt, 17119 So. Harvard, Gardena, CA 90247. Photo No. 12 shows a typical lineup of Texaco models at a California contest. In this case, this is the SAM 49 Texaco Meet held at Taft in December, lack Albrecht, the QA man at Kraft Systems and even­ tual winner, looks over Don Bekins’ (bending over) Lanzo with Dave Brodsky between. Models to be seen in the photo are a Lanzo Record Breaker, Shereshaw Eaglet, GHQ Sportster, Fiske Hanley, Flamingo, and Gas Bird. Photo No. 13 is of Al Heilman, a member of the Southern California Ignition Fliers (SCIFS) and the SAM 49’ers. Al is pictured here working on his Russell Simmons Eastern States Gas Π Γ Λ I I C \Ř I SCALE ACCESSORIES Champ. This design flies extremely well as a free flight or with radio control. lYL/lLIOIVI · BY WILLIAMS BROTHERS Al Heilman will be remembered for RADIO CONTROL SCALE PILOTS · SCALE WHEELS the outstanding job he did as Contest CONTROL-LINE CYLINDERS · ENGINE KITS · MACHINE GUN KITS Manager of the Las Vegas SAM Champs. FREE-FLIGHT PLASTIC DISPLAY MODELS Despite the hot weather, this was a thoroughly enjoyable meet with all the SEND 50f FOR COMPLETE ILLUSTRATED CATALOG entertainment available in the evenings. .(J/feyAIMS DEPT MB Having an international airport within BROS. IN C ^ 181 PAWNEE STREET, SAN MARCOS, CA. · 92069 several miles allowed many of the eastern contestants to come out and The balance of the rules give the Chicago Aeronuts, flew Old Timers with truly enjoy Las Vegas. SAM needs more timing procedure, motor overruns as an enthusiasm that seemed to know no workers like Al! zero, five attempts, and the one best bounds. Bruce Lester is responsible for photo score wins. Probably the best epilogue anyone No. 14. Bruce took many valued pictures Think you are pretty good at flying could write for Buddy was neatly of the Nationals in the 1936-39 era and Old Timers? Try the event aboveand see summed up by Bob Hartman: "He was a still has the negatives. We hope to run just how good you are. We are anxiously man who loved and lived life to the full one of these ever so often to show what awaiting the report from SAM 40 to see extent of his person; a character who the original designs looked like. The how the contestants did. touched the lives of many in our Old model pictured here is Maxwell Bassett’s REQUIEM FOR BUDDY Timer activities, one who will be greatly Miss Philly VI taking off on its winning missed by all." flight in 1937 at Detroit's Wayne County Received a very long eulogy by Bob Airport. Hartman to Buddy Equitz, who passed THE WRAP-UP Bassett's winning time of 70:02 topped away on November 29,1979, at the early This month’s column has been pat­ Goldberg's Valkyrie time of 52:45. In­ age of 46. terned after the old “ Gas Lines" column terestingly enough, the first six competi­ Buddy was extremely active in the that was a regular feature of Model tors in this event all had times over 40 Model Engine Collectors Association, Airplane News in the late thirties and minutes! Tough competition. having a very good stable of engines early forties. We solicit your opinion as Bruce Lester, a Canadian, is now himself. Buddy also, as a member of the to whether you like this format or not. retired. SAM 40 FUN-FLY Among the many ideas we receive for events in Old Timers, SAM 40 has come up with the latest idea in fun-fly type contests, this one for R/C models. The first five rules have to do with contestants being required to time each other, only one class of flying is involved, models must conform to SAM rules,and the BOM rule is waived. Here’s what the fun is about: Rule 6. You have 5 minutes (300 seconds) to do the following: Take off and circle for touch-and-go in 25-ft. circle. Climb for balance of sixty-second motor run, cut motor, and glide for balance of 300 seconds and land with wheels in 25-ft. circle. Rule 7. Touch-and-go in circle is worth 50 points. Rule 8. On touch-and-go, wheels must not be over three feet above ground at circle or contestant must try again. Rule 9. Each second over 300, deduct one point. Each foot away from circle edge to wheels, deduct one point to a maximum of 100 points. MAY 1980 103 Midway Station, Kent, WA 98031. For Precision Sanding on Large, True Surfaces WINDSPIEL MOVES AGAIN "The remaining inventory and tooling of Windspiel Models has been acquired • W o n 't by Mr. Keith Smith and Mr. Doug w ea r out Klassen. A new company, Pacific Sail­ • M akes planes, has been formed to reintroduce the updated product line to the market­ sanding easy place." 1 inch No. 142—22 inch Quoting further from a news release just issued, "While Pacific Sailplanes’ 75 $299 main thrust will be scale sailplanes to For best results use satisfy the growing interest in that facet RUFF STUFF of soaring, the first kit to reach sailplane Adhesive Sheet Sandpaper” . No glue. No enthusiasts will be an entirely new time. Ideal for special sanding shapes, sport/competition thermal glider called to most materials 9"x11" sheets. Choice Fine, or Super Fine. 46c ea the Red Tail 100, named after California’s well-known soaring hawk. The Red Tail APPLIED DESIGN CORP. * 738 Penn Street · El Segundo, CA 90245 has been under development for over two years by its designer, Dr. Terry Hovey, and has evolved into one of the THE POTENT PEOPLE sleekest of the new generation sail­ READY TO planes. The wing is balsa/spruce con­ struction spanning 100 inches. The fuselage is hand layed-up epoxy fiber­ P-30 Class _ glass. Pr*-fab vinnerNX ^ MW' H i "The first of the scale sailplanes to be ▼HE POTENT 30 fo rm a n e ·! reintroduced will be the Windspiel « ·« “ ;5° p;p; Kestrel 19, with the Fokker FK-3soon to NEW! Reid H u ll's O. T. Kit features M ulvhill Winner (19411 . Pre-cut Ribs follow after careful redesigning and re­ Finished Winq Mnt., Rudders tooling. A full lineup of high perfor­ n o ?·? B lo c k Finished Prop. mance scale sailplanes will be released B . A. Wa she r . through 1981. Jap Pissue.Con­ test Rubber, “ For additional information Pacific K it R-3 117.50 WIN WITH POTENT Sailplanes can be contacted at 18930 AIRPLANES WATCH FOR Soledad Canyon Rd., Canyon Country, NEW KJT RELEASES S< CA 91351, or call (805) 252-2644.” WEPLEvTlN'i CO. SYNCHROGYRO ADDENDUM 3620 MORSE AVE,. »8 SACTO, C A L IF . 96821 Fi% lee tax in C alif. Still more ideas on the popular Syn­ WRITE FOP ATTRACTIVE DISCOUNTS chrogyro (Sept. ’79 RCMB) by the de­ ORALERS! signer himself, Georges Chaulet. Mod­ cal Scale kits by Toni Clark of West elers have had problems finding the The only advantage this type column has Germany. over the other is that names, addresses, proper gears to synchronize the over­ and a short resume of each modeler is The following airplanes will be of­ lapping twin blades for this 2-channel given. Sometimes we do like to hear fered: 72-inch span Tiger Moth for .60- R/C autogyro. Theaccompanyingsketch what the other fellow is doing. · .90 engines, 106-inch span Tiger Moth shows another way to accomplish this, for Quadra power, 80-inch span BE-2e and also suggests a change in blade for .60-.90 engines, and a 109-inch Piper rotation. R/C World . . . Continued from page 13 Cub for Quadra power. Plans and rib George says, "An alternate solution is sets for the large Tiger Moth and Piper to use standard parallel gears (about 2 pattern competitor for many years, has Cub will also be offered. inches diam.) and two universal joints, retired from dentistry and gone into the Ralph has already taken his first step like the ones employed on the prop model import business. His goal is to in promotion as he was an exhibitor at shaft of boats. I used that system on the handle only quality model products that the Pasadena I.M.S. Trade Show in mid- first Synchrogyro I built, a small F/F have not been available in the United January. model powered by an O.S. Pet. It works States. In accordance with this policy, his Name and address of the company is great, with an added advantage, which is first product line is the excellent Practi­ Brooke Model Products, P.O. Box 3714, that the angle between the blade shafts

"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

104 R/C MODEL BUILDER can be chosen according to your wish (about 25°). “ Note: The lift of the rotors can be SAIL CONTROL WINCHES slightly improved if the rotors turn according to the direction indicated on the sketch. When you are ready to launch the S/C 4. .. which is more easy than R.O.G. . . . keep the motor at idle until the rotors build up turns. This is because at full revs, the prop may produce a reverse airflow around the rotors, which impede their efforts to start turning. “ Hold the model slightly nose up until W-1 ... $59.00 W-2 . . . $129.00 you ‘feel the lift.' Some more incidence may be added to the 10° indicated on • Custom R/C design for all boat sizes «Power - 40 in. lbs. »Travel the plans, and I suggest 12°-15°. In case time - 5 seconds · Voltage - 4.8-6 (W-1) »Size -2x2x5 inches. of a stall, a little more down-thrust The Probar ZV 1 is mechanically operated by a separate, neutralizing should be added to the engine. servo. The Probar Propo W-2 is designed to plug directly into the receiver, “ And remember, as said Lilienthal, the and requires no extra batteries. Specify Kraft, Futaba, or no connector. Wright Bros., Ader, Caproni and Sikor­ Both winches are fully assembled and tested, ready to install. A ll mounting sky, that building is only 10% and trim­ ming 90%.’’ hardware, switch pushrod fW -1 onlyI, and winch arm blank are supplied. Another Synchrogyro was brought to STAINLESS STEEL HARDWARE: MISCELLANEOUS ITEMS: our office recently which used Bolink Turnbuckles, Chainplates. Goosenecks, Sheet exit guides. Bowsie, Boom vang pivots. Pad eyes, Tangs, Rudder posts. Mast head 1/12 Electric R/C car drive gears. Al­ Deck cleats. Boom cleats. Rigging wire, fitting. Dacron sheet line. though the shafts were angled, approxi­ Des/er inquiries incited mately one-third of the gear tooth area overlapped, providing plenty of strength PROBAR DESIGN P.O. BOX 639 ESCONDIDO, CA. 92025 to do the job. WARBIRDS UNLIMITED TONGUEINCHEEK trolled model gliders. In case you didn't notice the ad in our The following was published in the You mean those toy aeroplanes made last issue, we’d like to tell you more August 1979 issue of SAARF, newsletter of balsa and tissue paper. Good heavens, about the Stand-Off Scale Pylon Race, of the South African Association of he leaves a pretty little girl like you alone "Warbirds Unlimited,” to be presented Radio Flyers. The author’s name was at home while he goes out and plays by the Spirit of St. Louis R/C Flying Club, disguised. with toys. on June 14 and 15, St. Louis, Missouri. Good afternoon madam, I'm inter­ Oh, I don’t mind really, but it’s just This Scale/Pylon contest calls for static viewing families in this area and would that I get bored some times. Anyhow, scale and pylon competition limited to be pleased if you and your husband you can talk, what’s a good looking man models of World War II military prop- would possibly give me a few minutes of like you doing out on the street selling driven aircraft flown between the years your time. books? 1939-1946. The contest will be divided Well, I'm sorry but my husband is out Oh, it’s only a side line. I'm trying to into two phases: static scale judging and for the afternoon. However, maybe I can raise some extra cash towards a post pylon racing. Each aircraft must com­ help you, and anyway you may as well graduate course I’m wanting to do. Does plete a qualifying flight to compete, and come in and have tea, I'm alone and it your husband go out every Saturday then will be scored on total accumula­ will help to pass the time. What sort of afternoon? tion of scale and racing points earned. questions are you wanting to ask? Yes, and Sunday mornings! This event really grabs us, because as a Well, you see, we are doing research I see. . . When does he usually return? member of the R/C Contest Board some on a new series of information manuals Invariably late on both days. Why do years ago (and still) we remember when for a large publishing company. you ask? a proposal was made for a similar com­ You mean you are selling encyclo­ Oh, I just find it rather interesting. . . petition category to be an AMA event. pedias? How do you like your tea? and you say you don't mind all this? Unfortunately, the proposal got revised One sugar and a dash of milk thank Well, I didn’t object in the beginning, and watered down to become the color­ you. Your husband’s out on the golf but I must say it’s starting to get medown less Formula II pylon category, which course I suppose? a bit. Are these the questions you came fell by the wayside for lack of interest. If No, he's out flying. here to ask? only to satisfy our "l-told-you-so” Oh, he’s a pilot? No, it’s just that. . . w ell. . . if you were feelings about it, we’d like to see this Well, not exactly, he flies radio con- "Warbirds Unlimited” succeed. Briefly, up to 100 points can be earned AUTOGYRO PLANS for accuracy of outline, craftsmanship, FREE FLIGHT TWO C.L. Autogyro's colled and finish/color/markings in static HARDWARE scale, and up to 100 points for pylon root·. accilioaifl » MlCHfO« GYROFLYER /*//, / θ ' Length ------2 0 R o to rs racing (in eadj of 4 rounds of racing, 1st wins 25 points, 2nd — 20 points, 3rd — WINGING BALSA 15 points, and 4th — 10 points). Engine HOOKS STRIPPERS requirements are: .38 cu. in. minimum &■ (cumulative if multi-engines used), and G y ro / : 14.00 G y ro II :l 6.00 1.25 cu. in. maximum. Wing areas vs. 'dETEy SČŤŠT 1 CIRELETOW both for 7.96 SAVE 51% on displacement requirements vary from leo u p e l h u b b -t k it awoo··A r t I Gyroflyer I 1000 sq. in. for 1.25 cu. in. down to 440 sq. HUM!MAI .jJ air§ romart* »·, mao S end t o : · · · » · * v«v«rJJTmourn ro m ra o o o i a >· amm a * Y o u r S p a rk in. for .38, and wing root must be 10 NEW 1 eom • r C. FREDRICK percent of chord. CiliLoa | f ii~ o f CAMPBELL Write or phone C.D. Don Hoelting, (tJIM CROCKET REPLICAS ORIGINALLITY 110 Castle Dr., Florissant, MO 63034, PC BOX 3925 More designs 1442 N. FRUIT AVE. P A N A M A C ty (314) 921-4983. coming SOON This should be a great one! FRESNO. EA. 93728 F L . 3 2 4 -0 !

MAY 1980 105 But how on earth does one control one of these? Cm CURACAO MODELBOUW It’s a special kind of radio like this one. * ^ PRESENTS FOR THE U.S.A. MARKET Each direction one moves these sticks is MODELBOATS & - SHIPS, oldtimers as well as modern. a different control movement on the various flying surfaces. > A ll highest quality hobby kits. I suppose all this is rather expensive? SLAVER AGILIS" • Over 90 models to chose from Oh, I don't think so. I don’t really • A ll features complete w ith english instructions incl. know . . . my husband will know all the • Precision fittings and details details. • Wide range of propulsion systems available When did you say he would be re­ • Suitable for R/C. turning? I didn’t say because I don’t really know, but does that really matter? Well it’s, it’s just that I'dliketoask him how to go about starting. Well, um, I'd just prefer that he was here so that I could talk to him about.. .do you mean Complete catalog showing a number of other interesting kits w ill be sent to that this really flies . . . without an you on receipt of US$4.- to cover airmail charges (refundable w ith first order). engine? How does one get it airborne? I CURACAO MODELBOUW - P.O. BOX 470 Curacao, Noth. Antilles must have a chat to your husband. Look I mail orders retail wholesale im port and export design custombuild must rush off, now, please tell him I called and, uh, tell him I'll pop by later this evening, I’d like to ask him a few questions! · / " KITS · PLANS · ACCESSORIES \ Don’t worry, let’s leave them, what

PNUT KITS · NYLON bíabing s about those questions you wanted to ask BROWN CO 2 ENGINES me? Workbench . . . Continued from page 6 REAL JAPANESE TISSUE-PROPS Oh, I can't be bothered with that now, COMPLETE CATALOG $1.00 close cooperation with AMA. Complete MANY HARO TO FIND ITEMS let’s just talk. I have enjoyed this after­ KIT S 4.4 9 details of event dates and places, along Peck-Polymers noon so much already, let’s not spoil it with all related information, will no now. Do you mind? BOX 2498-MB LA MESA, CAUf. 92041 J doubt appear in the AMA magazine. No, I must say you are helping my my wife, I don't think I could leave you boredom! Will you be coming around ANOTHER MILESTONE alone like your husband appears to do. again after this to try to sell me your There doesn't seem to be any hard, Thank you, you will make me blush in books? fast rule in magazine publishing as to a second. Are you marriedI Would you like that? Little toy aero­ how individual issues are numbered, No, I will only think of that when my planes .. . indeed some people don’t and for that reason, we at R/C Model studies are completed. realize what they're missing. Builder chose the one most logical to What about girlfriends? Oh, they're not so little you know . . . us . . . the volume represents the first, Not much time, you know. why don’t you come through to the second, third, etc. year of publication Like some more tea or would you bedroom, I’ll show you. . . . we're into our tenth. The number is prefer something else . . . sherry per­ Good heavens! What on earth is that simply a count-up of the issues pub­ haps? on top of the cupboard? lished . . . a continuous count. So, if you Thanks very much. You know you That’s his latest creation. A one- haven't noticed, this is our number 100! have the most beautiful eyes I’ve ever seventh semi-scale model of the F239 Who'da thunk we’d still be at it 100 seen. subsonic low level strike fighter bomber. issues later as we struggled over that Your's aren’t bad either. Excuse me. And your husband flies this thing? little volume 1, number 1 issue of 40 I'll just wash the tea things. Have another Yes, it’s a slope machine utilizing four pages back in mid-1971? drink. radio channels with the option of two We wish to thank everyone who has No, come now, let me do those. more for bomb dropping and tail stuck with us during the first 100, and Where is the kitchen? 'chutes. hope we can offer enough to hold your

ίίΙΙΛ Τ CTI ICC” THE ORIGINAL HOBBY I O I w l ■ ™ CYANOACRYLATE ADHESIVE just the way YOU want it! V “HOT STUFF”™ “HOT STUFF”™ X ^ i l P F R GAP FILLING “HOT STUFF’™ —ΡΛ Y\P i ι ι \ ι ρ ζ z filleting ORIGINAL CLEAR FORMULA “ *” V I J POSITIONABLE low viscosity—deep penetration EXCLUSIVE VISIBLE FORMULA HIGH VISCOSITY INSTANT BOND RATE (3 to 10 sec.) low viscosity—deep penetration TIMED BOND (10 to 25 sec.) This is the one that started it all! INSTANT BOND RATE (3 to 10 sec.) (jse like regular glue without the wait 14.2 GR = V* oz...... 3.95 14 2 GR = 1/2 oz...... 4 95 14.2 GR = V2 oz...... 3.95

5$ g=r = fo z .: : : a II o a l l 3 a t y o u r d e a l e r s n o w : : : vlšo

S a f r Æ f e C it y P.O. BOX 836 · SIMI VALLEY, CALIFORNIA, U.S.A. · Phone (805) 522-0062

106 R/C MODEL BUILDER INDEX TO ADVERTISERS Ace Radio Control, Inc...... 80 Proctor E nterprises...... 96 Aeromarine Enterprises...... 70 Dick Hanson Models...... 100 Pro Line E le c tro n ic s ...... 90 Applied Design Corp...... 104 Heli-Center West...... 99 Quarter Headquarters...... 91 Associated Electronics...... 67 Hi-Flight Model Products...... 74 Radio Control Buyer's G uide ...... 72 Astro Flight ...... 68 Hobbies +...... 101 Repla-Tech International...... 94 Authorized Radio Control...... 109 Hobby Horn...... 88 Replica Engines...... 94 Barron's Scale Classics...... 109 Hobbypoxy...... 85 Rosie's R/C Products ...... 80 Bavarian Precision Products...... 74 J-5 Enterprises...... 103 Satellite City ...... 106 Bridi Hobby Enterprises...... 66 JoMac ...... 87 S.C. M o d e le r...... 96 Byron Originals ...... 102,110,111 J & Z Products ...... 97 Sig Mfg. C o...... 5 Cannon Electronics...... 95 K & B Mfg. Co...... 1 Bob Smith R/C A irc ra ft...... 3 Cass Engineering...... 82 Kraft Systems...... 69 Southwest Modeler's Show ...... 112 C. Frederick Campbell...... 105 K & S Engineering...... 91 Sterling Models ...... 75 Cosmocon Ltd ...... 109 Kustom Kraftsmanship...... 93 Sullivan Products...... 4 Coverite...... 86 Micro-X Models ...... 86 Tower H o bb ies...... 76,77.78.79 Craft-Air, Inc...... 73 Midway Model Co...... 102 Uber Skiver Knives ...... 84 Jim Crocket Replicas...... 94,105 Midwest Model Supply...... 88,98 U.S Scale Masters Championships . 92 Curacao Modelbouw...... 106 Midwest Products ...... 91 VL P roducts...... 95 DaCa Model Products...... 93 Model Engineering of Norwalk...... 93 Vortac C orp...... 96 DGM Industries ...... 95 Model Products Corp...... 89 Warbirds U n lim ite d ...... 82 DuBro Products...... 71 Model Rectifier Corp...... Cover 4 Charles W e rle ...... 104 Electronic Model Systems...... 85 Walt Mooney Peanuts...... 100 Williams Bros...... 103 FAI Model Supply ...... 100 Sid Morgan Plans...... 86 World Engines ...... Cover 3 A.J. Fisher, Inc...... 104 Octura Models ...... 90 C.A. Zaic/Jetco M odels ...... 83 Fli Shirts...... 92 Pacer Industries...... 99 Flyline Models...... 97 Peck-Polymers ...... 86.106 HOUSE ADS Fox Mfg. Co...... 83 Pierce Aero Co...... 104 Polk's Hobbies...... 100 Classifieds ...... 107 Futaba Corp. of America ...... Cover 2 Plans Service...... 108 Giezendanner USA...... 98 John Pond O.T Plans...... 89 Carl Goldberg Models ...... 81 Probar Design...... 105 Oldies But Goodies ...... 101

loyalty and interest until number 200 is heard about the California rains in attend the WRAMS Trade Show, when reached. Meanwhile, when this issue February of 1980. We were kinda smug the news came by phone on Thursday reaches you, join us in a toast to the about our level location in Costa Mesa, night, February 21, that the heaviest and future, as we will do the day it leaves for as the mudslides in Los Angeles suburbs steadiest downpour of all had backed up the printer! made the TV and newspapers. However, on the flat roof of our one-floor office REASON NUMBER TWO we didn't count on one, wayward tennis building, putting so much water pres­ Yes, another reason for celebrating ball! sure on the seal (we were lucky the roof when this one "goes to bed." You’ve We were in White Plains, New York, to structure held!) that we suffered heavy

CLASSIFIED ADS WANTED Profile Publications numbers 17 Non-commercial (personal items) Rate is 25 cents per word, with a minimum of S3 00 41, 46. 47, 96. 113. 127 129. 166. 205.208. Commercial Rete is 40 cents per word, with a minimum of SS 00 No mail order discount 214. 228 246 for collection Some duplicates for trading R C Sargent, 1694 Wright Ave house ads knowingly accepted No advertising agency discounts allowed Rocky River, OH 44116 All ads are payable with order, and may be for any consecutive insertion period specified Name and address free, phone number counts as two words Send ad and payment to WANTED Original Cleveland drawings. SF 7B M ODEL B U IL D E R Magazine. Classified Ads. 621 West 19th St , Costa Mesa. Ca 92627 Helldiver, SF16 Albatross and other old time rubber scale plans, prinlwood. and kits Sam Hackney. 1343 Quintero, Los Angeles. CA KEVLAR 49 FABRICS Kevlar has a higher MODEL YACHTSMEN — Proportional con 90026. (213) 626-9851 tensile strength and modulus than fiberglass, version ol any sail control unit R C " plus a 30% weight savings For price list and spinnaker control RC genoa control CUSTOM MACHINE WORK by active mod­ info, send to Hi-Pro-Form Fabrics Inc . 962 Plans $2 each — all $5 Rainbow, Box 796- eler SASE with your sketch lor quote Roy B Devon D r. Newark. DE 19711 MB. Westbury. NY 11590 Stewart. Zimmerman Dr Princeton IN 47670 MORTON M-5. Complete set of 1944 factory GLASS CLOTH 0 6 oz . Iinest woven quality. engineering drawings ol 5-cylinder radial 38" wide, continuous length Works equally UNIOUE, versatile, constant current ni-cd model airplane engine 48 pages in binder well with epoxy or polyester resins or dope battery charger U-build it from my plans Free with owner's manual and tune-up hints $9 00. Stock up. save 5 yds $13 95 10 yds $24 95 details Send SASE to Electro-Motivation sent first class Would like to buy one of these Postage paid Dan Parsons. Dept A 11809 Box 892 Montara CA 94037 engines Mark Wallach, 27 New St.. Nyack- Fulmer N.E., Albuquerque. NM 87111 on-the-Hudson. NY 10960 NEW K&B 7.5cc marine engine In the box, never run. Best offer J Hammer. Rt 5, Box TOLEDO WEST HOBBY SWAP MEET Got 020 REPLICA KITS Playboy Sr Strato- 1030. Rhinelander Wl 54501 Streak. Brooklyn Dodger, So-Long Free price some engines, kits, etc. you don't want7 Want to buy hobby items cheap? Come to "Toledo list J & R MODELS. 5021 W Sheridan Si SMITH PLANS Plans available again Curtiss W est" FREE ANTIQUE ENGINE APPRAISAL Phoenix. AZ 85035 Hawks. Grumman Duck, Vought Kingfisher — Bring your old engines, kits. cars, etc Find Brochure 50C Note new address Smith out what they are really worth BRING A 300 F/F KITS, rubber, Jap, silkspan, acces­ Plans. 9422 N Fairway. Sun Lakes. AZ 85224 CARD TABLE Valley Federal Savings & sories Send 45C in stamps for catalog: CHE' Loan, 21031 Ventura Blvd.. Woodland Hills. HOBBIES. 10900 Eastwood A ve. Inglewood. WILL BUY old model airplane ignition en­ CA Sat. April 26.1980 Info: (213) 340-0149. CA 90304 gines Also Jim Walker "Fireball" plans, kits, ask for Art or built-up Frank D Macy.5200SE Jennings COMBAT FLYERS ARF Planes Gotcha ' »11. Milwaukie. OR 97222. WANTED Old-Time spark ignition model air­ fast combat $35 "SC-2" replaceable wing plane motors and gas model race cars slow combat $35 Foam wing cores Send ENGINE PARTS Large stock1 Send SASE for Russell Stokes, Rt 1. Box 73J. Keller. TX S ASE. or call (717 ) 964-2086 The Core parts lists Hobbies Etc Dept MB 16661 76248 House, Box 300A. RD »2. Palmyra. PA 17078 Redmond Way, Redmond WA 98052

MAY 1980 107 FULL SIZE PLANS SERVICE No. 280-O.T. R ED RIPPER $5.00 No. 1079-S5 H A N K E R C H IE F $2.00 Including reprint of construction article Sort of a 'squared off’ Zipper, from 7/40 Hull lines drawing for 50/800 R/C sailing Flying Aces. 72" span. By Jerry Peeples. yacht. Uses Bingo sail rig. By John Hanks. (if any) No. 1801 CESSNA 310 $6.75 No. 9791 SYN CH RO G YRO $5.00 This compact R/C scale twin spans 52" Twin-rotor autogyro for 2-ch. radio, .35 No. 5801 F6C-1 C U R TISS HAWK $9.00 and flies on .19 power. D. G. Prentice. engine. Easy to build and fly . G. Chaulet, Navy version of P1-B Hawk in 2" R/C precision scale. Very detailed. E. Martin. No. 1802 DFH-23 $2.50 No. 9792 C R IC K E T $3.00 An .020 mini-pattern ship for 2 or 3-ch. Balsa profile fuse. Ace foam wing 1/2A No. 5802 GOLDEN E A G LE $4.50 radio. Span only 22". Bengt Lundström. quickie for 1 or 2-ch. radio. J. Headley. FA I competitive Std. Class R/C sailplane. Glass fuselage available. Tom Williams. No. 1803 BRISTOL FLYING LAB $2.00 No. 979-0.T. LAN ZO '37 STIC K $8.50 An indoor rubber scale biplane from the First R/C Nats winner, 4th in Famous No. 580-O.T. S K Y R O C K E T $5.00 master of obscure designs. Bill Stroman. R/C series. Spans 9 ft. By Chet Lanzo. Class 'C' streamline gassie from Jan. '40 Flying Aces, span 62” . By Larry Eisinger. No. 180-O.T. SUPER CLODHOPPER $3.00 Highly refined version of 1937 Moffet \" ’ s t ic k ’ ’ e m " p a t t e r n s winner, from 1941 A.T. By Jim Cahill. j Complete sets of pressure sensitive patterns I provide "printed wood". . . on your stock . . No. 4801 B R U SH FIR E $6.00 No. 12791 A5A V IG IL A N T E $5.00 * for selected M ODEL B U IL D E R plans. Press Contemporary design being used by sev­ R/C Sport Scale modern-day jet fighter I all patterns for ribs, bulkheads, tips, etc., on eral top pattern fliers. By Ken Bonnema. for .40 size pusher engine. Pavel Bosak. ■ proper thickness sheet balsa or plywood, j and cut 'em out! No tracing, no transferring. No. 4802 SUNBIRO $3.50 No. 12792 E X C A L IB E R II $5.00 For the latest challenge, a 54" span hand ■ no plans tearing, no inaccuracies. Just like R/C tunnel-hull outboard constructed of j making up your own kit with printed wood. launch R/C glider. By Dave Thornburg. plywood, for K&B .21. By Jerry Dunlap. I "Stick 'em Pattern" numbers correspond to j plan numbers. Order with plans and they'll No. 4803 B LA C K JA C K $1.50 No. 12793 STARDUSTER TOO $2.50 High aspect ratio hand launch glider for i be mailed together . . 3rd Class. Add 654 lower altitude roll-outs. Larry Sargent. Free flight rubber scale model ol popular j per set to mail patterns 1st Class. homebuilt bipe. 18" span. Steve Gardner. No. 480-0.T. AERONCA TANDEM $4.00 ! CALIFORNIA RESIDENTS ADD 6% T A X . Scale gassie from Feb. '42 Air Trails for No. 1279-0.T. MISS T IN Y $3.00 Ohlsson .23. Span is 48". Ronnie Albert. Well known and sharp little 1938 gassie No. 11731SP BIG JOHN the F IR S T $5.95 for .19-,23 ignition, 46". Barney Snyder. No. 574-O.T.SP T O COUPE $2.95 No. 674-O.T.SP RED ZEPHYR $3.95 No. 3801 LES LONG'S "W IM PY" $9.50 11791 POCKET SOARER $3.00 No. 6741SP T R IX T E R BEAM $2.95 Lightweight R/C 1/4-scale homebuilt for All sheet-balsa T-tail one or two-channel No. 774-O.T.SP OUT Ό SIGHT $2.45 electric or gas, 94" span. By Le Gray. 50" span glider, for .020. B. Lundström. No. 7741SP C U R TISS A/12 S H R IK E $3.95 No. 874-O.T.SP POW ERHOUSE $3.95 No. 3802 AEROSPORT "QUAIL" $2.00 11792 C U R TISS 18 T-1 $3.00 No. 91074-O.T.SP BUHL PUP $4.95 Abeginner's rubber scale, span 26". Easy No. 1174-O.T. SP LANZO STICK $1.95 Rare tri-wmged military seaplane in 3/4” to build, andgreat flier. By Walt Mooney. No. 11743 SP "C -O U ELL" $3.95 rubber scale, spans 24". By Bill Noonan. No. 575-O.T. SP MERCURY $3.95 No. 3803 OV 10A "BRO N CO " $3.00 No. 775-0.T. SP BOMBSHE LL $3.25 An out-of-the-rut rubber scale model for 1179 O.T. MISS PHILADELPHIA $7.50 expert builders, 36" span. Tom Houle. Maxwell Bassett's famed 8 -ft parasol gas No. 277-O.T. SP BERLINER JOYCE $6.25 model, kitted by Scientific By MB staff. No. 4771 SP "MISS ARPIEM" $3.25 380 O.T. FLAMINGO $6.00 I No. 577-O.T. SP GLADIATOR $4.75 Rare old-timer appeared in 1938 JASCO No. 10791 TH E BIG S T IK $10.00 catalog, 89” span. By Roger Hammer. World's most popular R/C design in a new Price includes 3rd Class postage and reprint size (8V4'I. For 2" engines. Don Anderson. of building instructions (if any). Add 654 No. 2801 TIP O R A R E $5.75 PER PLAN for 1 st Class postage. Add $1.00 Top pattern ship in 1979. Flown by Dave No. 1079-0.T. PANTHER $3.50 PER PLAN for overseas orders (except APO Brown at World Champs. Dick Hanson. Classic low wing kitted by Peerless, for and FPO). Complete plans list 354. . 1 θ-. 23 ign eng. 46" span. Walt Schultz. CALIFORNIA RESIDENTS ADO 6% T A X . No. 2802 JU N K E R S JU 880 1 $7.50 No. 10792 FIRST NIGHT $2.00 MODEL BUILDER PLANS SERVICE Prize-winning C/L scale medium bomber Novice sport rubber ship, 24" span. OK 621 WEST NINETEENTH ST. easily converted to R/C. Roland Baltes. for P-30 event By Godden & Moseley. COSTA MESA, CALIFORNIA 92627 leakage into the office portion. The area office carpeting. Assistant Editor Phil Short notice on this one, the 8th hardest hit wasthegraphicsdepartment, Bernhardt and graphic artist Chuck Annual M int Julep Scale Meet, also where the layouts for this issue (number Blackburn set up temporary headquar­ Quarter Scale Fun-Fly, April 26 and 27. 100, yet!) were completely saturated and ters in dry areas of the office and went to Located at the picturesque Rough River ruined. work on new layouts. Fortunately, none Dam State Resort Park, Falls of Rough, Our on-the-ball staff called the fire of the photographs, drawings, or typeset Kentucky, about 70 miles southwest of company, which arrived almost immedi­ copy were affected by the water. What a Louisville. For information, call C.D. ately (no kidding) and went to work. It way to celebrate number 100! Dale Arvin at (812) 283-5719 or Co-C.D. Don Childers (812) 283-7638. Events was necessary to relieve pressure on the THINGS TO DO two-by-four-foot sub-ceiling panels that include Sport Scale, Precision Scale, and were sagging under the water load by punching holes in several of them. UNITED STATES Meanwhile other firemen went up on PATTERN JUDGES the roof and pulled . . . you guessed it i t t . . . a tennis ball out of the downspout uspjA ASSOCIATION opening! They also hooked up a pump­ J o NAME ing system to pull an average of ten inches of water off of the 5,000 square ADDRESS foot flat roof. The resulting avalanche o f * flooded 19th Street! CITY STATE ZIP Before leaving, the firefighters Betty Stream, Sec/Treas., 3723 Snowden Ave., Long Beach, Calif. 90808 vacuumed 15 gallons of water out of the

108 R/C MODEL BUILDER BARRONS SCALE CLASSICS PLANS WITH CONST MANUAL When you build your model around ^ SPORT SCALE^T ITS FINEST ^ the best engine, doesn’t it CURTISS HAWK P6E $ 12.50 CURTISS GOSHAWK F il I 15.00 deserve the best exhaust system? CURTISS GULFHAWK ΙΑ $ 15.00 2IW S C A LE 6 3 IN SPAN If y o u chose Quadra as your engine, weight ratio available anywhere. And STINSON RELIANT SR9 $15.00 then you already know quality. And equally remarkable, the Quadra 2IN SCALE 84IN SPAN quite frankly, it means you should Charger reduced fuel consumption by PLEASE ADD $2.00 FOR P/H choose Quadra Charger by Cosmocon 25.7% while reducing noise by ALSO AVAILABLE IN 1/4 SCALE as your exhaust system. approximately 75%. Of course, a The Quadra Chjtrgp good is fully guaranteed. SEND $ 1.00 FOR COMPLETE. system authorized fey~ $68.80 U.S. plus $2 INFORMATION TO— creases power by 26.2% complete specs and to RICHARD G BARRON r.p.m.'s and has the 1213 HOLLY SPRING L A N E " " GRAND BLANC. MICHIGAN 48439 Cosmocon Ltd. R.R. 2, Uxbridge, Ontario, Canada L0C lKO. Quarter Scale. There's a Saturday night banquet, too. * * * A new club, the Indianapolis 500 Authorized- FA CTOR Y A UTHORIZED SER VICE Radio Controlled Model Airplane Club, FOR ALL OF THE FOLLOWING BRANDS has been formed with the express pur­ IŘ ad io pose of holding a championship Pattern Cannon O rui EK Logictroi and Sport Scale contest in the Indian­ (Qontrol Pro Lin«* Math as* RS* Micro Avionica apolis area. The first contest will be on Royal Orbit oa ο World Engine« June 14 and 15, with Novice, Advanced, S e r v i c e Simprop Kraft* Jo Mac Expert, and Masters Class Pattern, plus *ALSO WARRANTY SERVICE Sport Scale being presented. The site will be at Indianapolis Raceway Park, on the National Drag Strip. Verbal commit­ EXPERT SERVICE ON ALL BRANDS ments have been made by Dave Brown, Mark Radcliff, Don Lowe, Tony Bonetti, Don McCarthy < Factory trained technicians w ith over q Dan Kowallek, and others. For more 15 years in Radio C ontrol Electronics. info, contact Contest Director Leo J. Dickey, 1028 N. Illinois St., Indianapolis, Hours: Clos«d Sun a Mon; Tues - 10am —8 pm; W ad -Fri · 10 am—6 pm; Sat · 10 am—2 pm IN 46204. P.S. . . . $2,500 in cash prizes. (714) 639-8886 915 N. MAIN ST., ORANGE, CALIFORNIA 92667 * * * The 1980 NAMBA National Model irrefutable statistics that show exactly million are in the Armed Forces, which Boat Regatta takes place on August 3 why you are tired. And brother, it’s no leaves 15 million to do the work. Deduct through August 9, Wauhop Lake, in Fort wonder you're tired either! There aren't 14,800,000, the number in the State and Steilacoom Park, near Tacoma, Wash­ as many people actually working as you City offices, and that leaves 200,000 to do ington. The Director of this meet is our may have thought, at least according to the work. There are 188,000 in hospitals, own Jerry Dunlap, and for further info, this survey recently completed. insane asylums, etc. so that leaves 12,000 you can contact him at 119 Crestwood The population of this country is 200 to do the work. Dr. S.W., Tacoma, WA 98498. Also, Jerry million, 84 million over 60 years of age, Now it may interest you to know that has more about this meet in his column which leaves 116 million to do the work. there are 11,998 people in jail, so that in this issue. People under 20 years of age total 75 leaves just two people to carry the load. * * * million, which Ieaves41 million todo the That’s you and me brother, and I’m work. getting tired of doing everything by Hobby '80, Canada's largest hobby Then there are 22 million who are myself! and craft show, takes place October 24 employed by the government, and that Well, right or wrong, that makes us through 26. 1980, at the International leaves 19 million to do the work, 4 tired enough to quit for this month. · Centre, Toronto. This year, the show has been expanded to include crafts, with about half of the nearly 100,000 square MOVING? SEND NOTIFICATION FIRST! feet being set aside for displays and * Attach old label here 7 Attach old label here 1 demonstrations of crafts, ranging from NAME ! 1 macramé to pottery. Other demos in­ OLD clude the Grand Prix R/C race track, ADDRESS ADDRESS Metro Marine Modellers' indoor pond, live steam, model railroads, and slots, (Plcete Print) CITY J S T A T E Z I P 1 plus static displays of cars, boats, air­ 1 _ 1 planes, model miniatures and soldiers, Attach old label here ( \ Attach old label here and the largest plastics display in Canada. NAME For further info, contact Ted Curl, 924 NEW Brock St. North, Whitey, Ontario LI N 4J6, ADDRESS ADDRESS or phone (416) 668-8231, (416) 683-7766 (PI««M Print) (Toronto line). CITY STATE ZIP ARE YOU TIRED? The above title headed up the follow­ Change ot address notices must be received one month before date of issue that new address takes effect. For prompt service, old label MUST be attached. Post office will ing item found in a recent edition of the not forward copies unless you pay extra postage. Duplicate issues cannot be sent. Ship Modelers Association of So. Cali­ fornia newsletter, edited by Tom Palen. MODEL BUILDER, 621 West Nineteenth St., Costa Mesa, Ca. 92627 We have run across some absolutely MAY 1980 109 The First Practical Ducted Fan Propulsion System! After years of research, testing and improvements, the new Byro Jet propulsion system from Byron Originals signals the beginning of a new and exciting era in ducted fan performance, simplicity and affordability. Now modelers the world over can experience the thfill of realistic jet flight without the prohibitive expenses and hassles of tempermental racing engines, high nitro fuels, com plicated fan systems and incomplete semi-kits that require untold hours of building and countless trips to the hobby shop. The Byro-Jet is designed specifically for today's dependable schnuerle ported 60s. and low nitro fuel mixtures. And unlike other fan systems, its unique "pusher" design provides a un­ matched degree of thrust efficiency. By mounting the engine ahead of the fan and not behind it, a totally uninterrupted air stream is achieved within the thrust tube. Static thrust per­ formance in the 6 to 10 pound range is common with the recommended schnuerle .60s and our Custom Byro-Jet Pipe Systems. In operation, the Byro-Jet is as practical and convenient as any prop-driven installation. The entire engine, fan unit and fuel tank are within easy reach thanks to the combination access/intake port in the fuse bottom This makes refueling, carb adjustments and glow plug replacements a snap. The engine is extracted Complete Kit Concept simply by removing four bolts. Like all Byron Originals kits, the MiG and F-16 are de­ signed with our "complete kit concept" in mind This Authentic Scale Features Include «split rudder «wing simply means that every item needed to complete the fences «gear doors «antenna «cannons «accurate project, except propulsion, radio, paint and glue, is canopy frame outline «closed hinge lines «molded tn included in the kits. Only the finest state of the-art speed brakes & gun&ight camera construction methods and materials are utilized. This is our way of making sure that both construction and flying are fascinating and pleasant experiences.

Wing Span ■ 57” Length - 55" Wing Area - 60 0 sq. in. Ready-to-fly weight - 8% lbs.

Authentic Scale MiG-15 Factory Direct Price Spectacular Flight Performance! With 600 sq. in. of wing area and a ready-to-fly weight of $ 136.55 only 8 Vi lbs., this world famous, swept wing fighter is an plus $ 8 .0 0 shipping & handling impressive aerobatic performer. Thanks to a generous Byro- Jet end Starter assembly not included power to weight ratio, vertical performance ranks with most prop-driven aircraft. The relatively low wing loading and swept-wing design combine to make a surprisingly stable craft. In many respects, it handles much like a Items Included in kit: «Hinge» -12 Fuselage consists of hand layed fiberglass trainer. Anyone who has witnessed the many exhibition oz. fuel tank «Detailed canopy «Cockpit (polyester) with the following items factory flights across the country will agree the pitch stability ot floor «Nose cone «Armament «Special installed Combination fan bulkhead & wing mounting this aerodynamic configuration allows the MiG to hang on tools «Wheels «Nose wheel fairing •Landing gear «Control horns «All required spar indefinitely in a slow flight, nose-high attitude. Take offs fasteners «Balsa & plywood die cut parts Sealed radio compartment are |ust as impressive. Even from ordinary grass strips, the •Decal set (choice of 4 available) «Hand- Ny-rods MiG-15 will leap off in 100 feet. Landing characteristics layed fiberglass fuselage «Necessary Control rods linkage «Control surface (injection molded Vacuum-formed jet intake are much the same as any pattern ship. Recent radar polystyrene) · Premolded wings w ith all Alum inum vertical fin spars checks have indicated top speeds in level flight of just over pivots & torque rods molded in «Shock Thrust tube absorbing nose wheel assembly «Pré cut Aileron bell crank mounts 100 mph. All things considered, the MiG-15 is a trailing edge stock «Detailed & fully locating marks lor armament fascinating ducted fan accomplishment...a modeling ex illustrated assembly book «Three view with perience you can't afford to pass up. detailed painting instructions

Kit includes any one of four decal sets' In addition to your choice of decals, you will receive a matching set of painting' Econokoting instructions 4 view for both proof of scale and decal location and a complete material!, list outlining the recommended thinnera. primers ond paints A FAIMtastic Concept in Authentic Jet Flight! NEW

items included in kit: «Wheals «Hinges «Landing gear «Control horns «Special tools *12 or fuel tank «Nose wheel fairing • Necessary linkage «All required fasteners «Three complete decal sets «Balsa and plywood die cut parts «Scale flying stab assembly »Shock absorbing nose wheel assembly «Hand (eyed fiberglass fuse (polyester) «Detailed canopy and cockpit assembly «Detailed and fully illustrated assembly book «Pré shaped control surfaces (injection molded polyairyenel «Three view with detailed dacal and painting instructions «Injection molded wings with aluminum extruded wing spars already molded In and ready to plug into fuselage

Wing Span 47*' Length 74 Vi'* Effective wing area 750 sq in Ready to fly weight 9 Vi Ihs (less opt tanks & rockets)

Model shown with optional rockets and tuel tanks. Wings easily removed for transporting."

Hand-layed fiberglass Ipolyesterl Authentic Scale fuselage consists of the following items factory installed: F - 1 6 Combination fan bulkhead & Anyone who has witnessed the deluxe caliber of our wing mounting spar Factory Direct Price Pitts and MiG-15 kits will testify to the superb Ny-rods quality and complete nature of Byron Original Control rods $ 196.55 products. The new F-16 promises more of the same Thrust tube quality materials, expert engineering and craft- Scale, detailed exhaust cone plus $ 1 0 0 0 shipping & handling Molded in armament {Fan and starter ext nut included) manship. This exact scale replica of General Dynamics' lightweight fighter has been pain­ stakingly designed with scale details, quick assembly and performance in mind. In fact, the only deviation from true scale is a slightly thicker airfoil. BYRON ORIGINALS Every last detailed marking has been reproduced in decal form to ensure scale authenticity. Even the detailed cockpit interior is supplied at no extra cost. Every effort has been exerted to make sure this freedom fighter of the '80s is a mirror image of the original. Factory Direct Extraordinary Fight Characteristics! $ 49.95 Ever since our first public demos in Vegas last Fall, plus $ 2 .5 0 shipping & handling modelers across the country, and even overseas, have been raving about the unbelievable per The cutaway below clearly illustrates the un­ formance of this recent addition to the Byron complicated yet highly efficient Byro-Jet ducted Originals line. The verdict seems unanimous. From fan system. Entire unit is constructed of rugged, the standpoint of power reserves, landings, short glass-filled nylon and weighs only 11 0 2 . Removal of entire unit is achieved simply by grass field take-offs, slow flight abilities and overall removing four bolts. Switching the fan from the stability, the F-1 6 outranks any other jet model on MiG to F 1 6 is a quick and easy operation. Notice the market. the unique tuned pipe configuration and the convenient starting method,

IMPORTANT: You must check an engine below (B) to receive proper Byro-Jet Pipe and-or Fan Unit Send me: Byro Jets exclusive quick start MiG-15 Kit(s) @ $ 1 36.55 ea. plus $8.00 Shipping & Handling (Choice of four decals seo below) capabilities makes engine starting F-16 Kit(s) (a) $ 196.55 ea. plus $ 10.00 Shipping & Handling (Three decal kits included) fast, easy and safe No com F I 6 Tank & Rocket option (S> $26 95 (includes shipping and handling) plicated belt start procedures and Byro-Jet Fan Unit (5) $49.95 ea. plus $2.00 Shipping & Handling r>mph^nn no hatches to remove and Sullivan Starter Extension (3) $ 11.50 ea (includes Shipping & Handling) m reassemble Simply attach the Custom Byro Jet Pipe System (3) $48 95 ea. plust $ 1.50 Shipping & Handling iSaji^cw»» starter extension to your Sullivan ____ Epoxy/fiberglass^overing Kit (5) $22.50 plus $ 1.50 Shipping & Handling starter insert the assembly Check one MiG-15 Decal Kit: through the tail pipe until contact is 1. Chinese 2. Russian Aero Team ___ 3. Russian 4. Czech Aero. Team made with the rotor and hit the Determine engine to be used and check accordingly starter Webra .61 Speed β 1 03 0 Front Valve. R & S Exh. H P .61 Gold Cup Rear Valve. S. Exh. O S. Max 60 & .61 FSR. Front Valve. S Exh. O.S. Max .61 VF Front Valve. R Exh. Rossi .61 & .65 ABC Rear Valve. Rear Exh. O.S. Max .65 RSR Rear Valve. S. Exh. Webra .61 Speed # 1 0 2 4 Front & Rear Valve. S. Exh Undrilled Mount Also Available O.P.S. .60 & .65 Speed. Rear Valve. R. Exh. Name ______Phone Street or RFD _Apt. # City______State _l have enclosed check or money order for $_ In addition to increasing power output this unique Custom Byro Please charge to MC#______Exp. Jet Pipe System provides the necessary noise suppression and VISA# ______Exp. the means to completely conceal _C.O .D . (1.15 Additional Fee Per Order) tuned pipe within fuselage Available for both side and rear Iowa Residents Add 3% Sales Tax. Prices Subject to Change Without Notice exhaust 60 engines Sendlo: BYRON ORIGINALS. P.O. Box 279 , Ida Grove. Iowa 5 1 4 4 5 Ph 7 12 3 6 4 3 1 6 5 SOUTH W EST modelers

MODEL CONTEST CATEGORIES: OVER 100 MANUFACTURERS

AIRCRAFT NEW KITS BOATS Manufacturers NEW PRODUCTS COMMERCIAL EXHIBITS CARS Demonstrations ROCKETS LIVE DEMONSTRATIONS FREE FLIGHT Static SIX SPECIAL AWARDS U-CONTROL A.M.A. RAFFLE TRAINS Model Contest FREE PUBLIC PARKING PLASTICS DISCOUNT TICKETS

★ ★ ★ ★ Public Invited ★ ★ ★ ★ June 7th & 8th 1980 Women’s Building, Fair Park Dallas, Texas

ΛΛλΜΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΜΛΛίννΝΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛΜνννννΛΛηΛΛη/νννννυννν«ΛΛΑΛΜΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛ/ν\ΛΛΛΛΛΛΛΛΛΛΛΛΛΛΛ

* ¥ * ¥ * Good For 50# Off ζ Admission Price ¥ t 5 0 # t ¥ 50# ¥ ¥ DISCOUNT DISCOUNT ¥ ¥ SOUTH W ES T ¥ * ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ SATURDAY ¥ ¥ modelers SUNDAY ¥ ¥ JU N E 7 JU N E 8 ¥ ¥ ¥ ¥ 9:00 a .m .__6:00 p.m. 9:00 a .m .__5:00 p.m. ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ 50# WOMEN’S BUILDING STATE FAIR OF TEXAS 50# ¥ ¥ ¥ ¥ DISCOUNT Adults $3.00 Youth $2.00 Under 6 Free DISCOUNT ¥ ¥ ¥ ♦★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★A·* , O.S. 5 WORLD ENGINES S F T - I 2 0 s Q e iiu n j

O.S. FT-120 FOUR-CYCLE TWIN NOSEN CITABRIA

Peter Chinn, in cooperation with will be pleased with its resemblance O.S. engineers, has produced a to the typical full-size horizontally- beautiful 20-page instruction and opposed light-aircraft engines wide­ parts manual for this fine engine. It ly in use and also with its quieter, WORLD ENGINES is recommended for aircraft from more realistic sound. 9 lbs. to 15 lbs. and for moderate Mr. Ogawa, Mr. Mihara and Mr. acrobatic flight. Manuals are avail­ Sawada of O.S. are extremely able for $2.00 postpaid. proud of this engine. This is evident in the execution of every part, a The O.S. FT-120 'Gemini' is a gorgeous carton, wrenches, feeler horizontally-opposed twin-cylinder gage, radial mount and, in par­ overhead-valve fourstroke-cycle en­ ticular, the decal sheet. gine of 20cc (1.2 cu.in.) displace­ The Gemini FT-120 weighs 34.6 oz. ment. As with all O.S. designs, RPM range is from 2000 to 9000 a long period of technical develop­ on a 16x6 or 17x6 prop. The twin ment and prototype testing pre­ powered Citabria is modeled after a ceded its introduction to the market and we are confident that real one owned by Cincinnati's this is an engine that you w ill be Flying Neutrons, complete to the proud to own and operate. Scale same paint scheme and N number. model enthusiasts, in particular, O.S. FT-120 -$ 6 9 5 .0 0 WORLD ENGINES 8960 ROSSASH AVE., CINCINNATI, OHIO 45236 TELEPHONE (513) 793-5900 TELEX 214 557 SURROUNDED ON ALL SIDES ... Electronic noise is the bane of every flier. Almost without We took an R/C Guidance 3000 exception, every flying field has its share of signal interference on72.240 mhz and encircled it with that plays havoc with the most skilled flier and the best of radios. j high density radio interference. However, having already proved our R/C Guidance System was We had a 40 channel CB going built for unparalleled reliability, we decided to put it through a severe interference test. full blast; our 1A scale Citabria with ignition engine created its own vibration and electrical sparking Encircled by an inescapable noise; then we put on a 2 meter (144 mhz) ham radio. Nearby the blanket of interference, we put naval control tower was broad­ casting on four different frequencies. our R/C guidance system 0ff in another direction naval jets created their own chatter. We then through a severe control test. turned on six other R/C Guidance The actual test was performed at Lakehurst Naval Systems on adjacent 72 mhz Air Station, N.J., December 5,1979. We show here just frequencies. And still we continued a few of the interfering devices that our equipment to fly without even a momentary glitch. operated against. ATYPICAL FLYING FIELD MISHAP ... Result: We flew glitch-free. Output signal strong, We then created a situation you’ve receiver selective. \ no doubt experienced. Another flier on the same frequency, accidently puts on his radio. We did just that. Again our test radio ignored all commands but its own. And we remained in complete control. We don’t suggest you try this, as it was a test performed by qualified fliers and engineers under controlled conditions, with special safety precautions taken in case we did lose command of our aircraft. We do suggest you ask your dealer to show you an R/C Guidance System ... with double tuned front end, selective receiver and powerful transmitter output.

R/C Guidance Systems Available In 2, 3, 4 and 6 Channels Model Rectifier Corporation / 2500 Woodbridge Ave. / Edison, NJ 08817