Anthony Itali ano 1655 Revere Drive 74820M08545 Brookfi eId, W i s 5 W aterways” -..ait you.

* The Futaba ójWnakes max­ realism. Built into our 6 channel imum model boating more than system are a dual throttle modeodeaan possible, it makes it simple. Using exclusive throttle/rudder mixing1 the total performance electronics of circuit and heavy duty, watertight the J-Series, the new 6JB gives you S 107 servos. And, as with all the control it takes for total scale J-Series systems, you’ve goUDirect Servo Cbntrol, modular ANf or FM RF boards, sophisticated logic cir­ give our 6JB a twenty-one gun cuitry, built-in servo reversing, adjustable, open-gimbal control salute, just tell your ship that her I J radio has Finally come in. sticks, ATV and even programming lor rudder and ihm ttlr Rm Hnn’ i Program your next cruise. Adjustable throw rudder and mixing controls are comealed in the bark of theT6JB transmitter. To "make a hit” at Christmas time...

GIVING THE BEST IS TO GIVE WHAT ONE WOULD BE MOST PLEASED TO RECEIVE...

A. K&B Super Poxy Paint. B. K&B Glow Consistent quality for which K&B products are noted f Plugs. C. K&B Fiberglass. D. K&B Micro- can be acquired only over years of constant research and Balloons Filler. E. K&B Super Poxy Resin. f F. K&B Primer/Primer Catalyst. G. K&B Mix­ development. From this accumulated knowledge the ing Cups. H. K&B Fuel. I. K&B Engines (Air­ tangible products of the K&B line are then produced plane and Marine). ^ using the finest materials available. Thus for over 33 years the most discriminating modelers have been selecting K&B products for their “ ***“" “ ‘ quality, durability and performance. So, to be sure to please... give K & B !

RESIN

SURřR ΡΟΧ» PRIMERS

For all these K&B Products and more see your local hobby shop

K&B MANUFACTURING 12152 WOODRUFF AVENUE DOWNEY, CALIFORNIA 90241 DECEMBER

1979

volume 9, number 95

621 West Nineteenth St., 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 O V E R T H E C O U N T E R , Phil Bernhardt ...... 7 ASSISTANT EDITOR R / C W O R L D , Sally Brown...... 10 Phil Bernhardt “ 1 T O 1” R / C S C A L E , Bob Underwood...... 12 ASSISTANT GENERAL MANAGER T H E F L IG H T IN S T R U C T O R , Dave Brown...... 15 Anita Northrop R/C PYLON AT THE NATS, Joe Klause...... 20 ART DEPARTMENT C H O P P E R C H A T T E R , John Tucker...... 26 Chuck Blackburn Al Patterson R / C S O A R IN G , Dr. Larry Fogel...... 30 OFFICE STAFF G L O S S A R Y O F G L ID E R G IB B E R IS H , Dave Thornburg...... 33 Edie Downs D U C T E D FA N D E S IG N , Bob Kress...... 34 Ceorgi Cilleran Pat Patton F U EL L IN E S , George Aldrich, Joe Klause...... 36 A. Valcarsel P L U G S P A R K S , John Pond ...... 37 E L E C T R IC P O W E R , Mitch Poling...... 42 CONTRIBUTING EDITORS George Aldrich Walt Mooney H A L F -A S C E N E , LarryRenger ...... 44 Dave Brown Mitch Poling Otto Bernhardt John Pond S T R IC T L Y S A IL , Rod C arr...... 46 Rod Carr Fernando Ramos F R EE F L IG H T S C A L E , Fernando Ramos...... 50 Jerry Dunlap Larry Renger Larry Fogel Dan Rutherford F /F S C A L E A T T H E N A T S , Bill stroman ...... 52 Jim Gager Tom Hutchinson C O N T R O L L IN E , Dan Rutherford...... 54 Chuck Hallum Dave Thornburg Bill Hannan John Tucker C / L C O M B A T A T T H E N A T S , Rich Lopez ...... 56 Joe Klause Bob Underwood HANNAN'S HAN GAR, Bill Hannan...... 58 FR EE F L IG H T , Tom Hutchinson ...... 62 ADVERTISING MANAGER Walter L. Schroder C O N T R O L L IN E A T T H E N A T S , joe Klause...... 65

SCALE VIEWS BOEING F4B-3 & 4 (Part II), Pete W estburg...... 29

R/C MODEL BUILDER (ISSN 0194 7079) is CONSTRUCTION published monthly by RCMB INC., 621 West Nineteenth Street, Costa Mesa, Cali­ A5A VIGILANTE, Pavel Bo sak...... 16 fornia 92627. Phone (714) 645-8830.

"EXCALIBER II” OUTBOARD TUNNEL, Jerry Dunlap ...... 22 Subscriptions $20.00 per year, $37.00 for two M ODELCRAFT’S "MISS TINY” O.T., Snyder, Bernhardt...... 40 years. Single copies $2.00. Add $3.50 per year for postage outside the U.S. (except STARDUSTER TOO, Steve G ardner...... 48 APO and FPO). PEANUT CHIRIBIRI N.5, Walt M ooney...... 59 Copyright 1979 by RCM B INC. All rights reserved. Reproduction without permission prohibited.

Change of address notices must be received six weeks before date of issue that new COVER: Contrary to what you are probably thinking, that beautiful 1/3-scale Pitts is address takes effect. Send old address with not from a Byron Originals kit. Credit for an outstanding example of scratch building new; old label preferred. Post Office will goes to Wayne Stanford, of Nampa, Idaho. The model is of all balsa and ply not forward copies unless you pay extra construction, uses a Quadra for power and a Kraft radio for guidance. Miss Linda Rife, postage. Duplicate issues cannot be sent. a student at Boise State University in Boise, Idaho, is the other lovely model in the photo. Ektachrome transparency by Tony Huber. Second class postage paid at Costa Mesa, California, and additional offices.

2 R/C MODEL BUILDER

Ě Ě era b ee - Ě lo M a a . 1/12 Scale National Winning Electric R/C Race Cars o R/C ELECTRIC #264 SCHKEE 6 CELL ASSEMBLED ELECTRIC R/C ELECTRIC R/C CARS LESS RADIO RACE CAR LESS RADIO WITH WITH ELECTRONIC RACING SPEED CONTROLLER CAR SPEED Designed as a full race top of the line CONTROLLERS SPEED CONTROL ROAR legal modified race car for those who have their own radio. #273 CHALLENGER 6 CELL The JoMac 487 and 486 fully proportional modular forward speed controls have ASSEMBLED BASIC R/C RACE Complete with #486 proportional race been designed to control the speed of CAR WITH SPEED CONTROL speed control, modified 05 race motor, electric motor driven model cars, boats, LESS RADIO. 6 Nicad batteries, battery charge cord, airplanes and similar models. The power Lexan Jerobee chassis. for the motor can be 3-7 series connected Designed as an assembled low cost Many accessories and bodies available 1.2 volt Nicad battery cells. These race car for those who wish to use their controllers are made to plug in and operate with most positive pulse radic own radio but prefer the smooth control Features Include: control systems. Versatile battery power of an electronic throttle. arrangement allows your complete * Motor mounts in front or behind axle. system to be powered from one battery ROAR slock legal. Many accessories * #740 mounting plate for radio servos, pack if desired. and bodies available. speed control, battery, antenna, and switch. * National winning #486 race proportional speed control with adjustable dynamic brake and 24 amp high torque adjustable output. * Lexan control flex chassis complete with bumper. * Assembled charge cord for 15 minute fast charge (works from 12 volt source). Replaces and is better than ' Adjustable independent front servo/resistor assemblies in these ways: suspension w/Ackerman steering. 1) Less expensive than servo alone. ‘ Modified rewound (32 turns of 22 2) More reliable than resistor. gauge) .05 motor balanced and 3) Truer proportional speed. epoxied for maximum speed and 4) Faster reaction time by at least .3 reliability — ROAR modified legal. seconds going from off to high * Painted Lexan Schkee Can Am body. speed and from high to off * #603 foam rear tires full legal 1 Ví " Features Include: because you don't wait for the wide and set screw wheels. servo to travel. #740 shaker plate mounting plate for * Heavy duty hardened round rear axle. 5) Smaller, more compact. radio, servos, speed control, battery, * 6 sealed fast charge G.E. Nicad 6) Lighter in weight. antenna, and switch. batteries wired and dip protected. 7) Easier to mount. #487 Electronic Proportional 12 Amp * #621 ball bearing front wheels and Specifications: Speed Control #605 foam front tires. High strength molded controlled flex * Rear axle ball bearing. Positive Pulse Input: 1.0 - 1.7 ms chassis * Mylar decal sheet. (adjustable) Assembled charge cord for 15 minute * 2 cells disconnect for 4 cell operation. Control Circuitry Supply: 4 Series fast charge (works from 12 volt * Speed: 34 MPH 56 KPH connected AA or Nicad cells (4-6 volts). source). Motor Supply: 3 - 7 Series connected Adjustable independent front Average Stall Current: 6 cells (05 motor) suspension w/Ackerman steering. = 487/15 amp 486/25 amp. .05 ROAR legal stock motor. #487 Modular Electronic Speed Cycolac molded body, no painting or Controller 12 Amp Output. This trimming necessary. unit is similar to the controller on Molded long wearing front tires & JoMac #407 radio system. sponge rear tires. #486 Modular Electronic Speed Heavy duty hex rear axle. Controller 24 Amp Output 6 sealed fast charge G.E. Nicad w/Adjustable torque and brake. batteries wired & dip protected. This unit is similar to the controller Mylar decal sheet. on JoMac #406 radio system that 2 cell disconnect for 4 cell operation. has won five (5) national Speed: 30 MPH 50 KPH championship electric races.

For Complete Information, Send $1.00 to: JoMac Products Inc., 12702 N.E. 124th St., Kirkland, Washington 98033 (206) 823-2303 SOME "NEW” PRODUCTS WE’VE HAD FOR YEARS PLASTINAMEL CORE-BOND Several companies have re­ These newborn Brand X foam wing cently discovered that mod­ adhesives with catchy names and elers like to paint their molded sooper-dooper slogans have remind­ foam airplanes. Sig has taken ed us that we’ve been hiding our light care of this problem for many under a barrel when it comes to Core years with a time proven and Bond. Over the years it has gained tested product. The most im­ a loyal following among some top portant feature of Plastinamel notch competition fliers because it is is that it can be painted direct­ light in weight and sticks down even­ ly on molded foam without any ly. Best of all, where beginners to protective primer or filler coats foam wing covering are concerned, being required. Fillers are it is not so likely to dissolve foam dur­ heavy and the performance ing construction as other types of glue might do. Cover your next foam of foam airplanes deteriorate CB-001 Pint $3.25 8 Brilliant Colors wing with tried and dependable Sig rapidly when they are over­ CB-002 Quart $5.75 White Orange weight. Weigh and compare! Core Bond. Black Yellow Red Light Blue Plastinamel Thinner Green Dark Blue PE-030 4 Oz. Jar $ .75 EPOXY PUTTY 4 Ounce Jar $1.49 PE-031 8 Oz. Can $1.25 8 Ounce Jar $2.75 PE-032 Pint Can $1.75 EPOXOLITE Hobby Dealers have almost had to EPOXOLITE add an extra shelf to accomodate all SILICONE FUEL TUBING „EPOXY PUTTY the fillers, putties, pastes and mixes MOOCL AlKWAMCi that have been showing up on the Silicone Tubing has been bust­ market lately. But there is only one ing out all over as the last word Epoxolite by Sig—the standard by in fuel line. Read some old Sig which all the rest should be meas­ catalogs, friends! Our Silicone ured. Notice when you read con­ Heat-Proof Tubing has been struction articles in back issues of heading the Fuel Line page for the model magazines, the number of more back issues than we can times plans call for Epoxolite fillets find. The Sig Factory Fliers or the text tells how to shape a scale haven’t tried any of the new landing gear fork with this material. - J f 1 competition brands, for how Designers automatically think Epoxo­ can they be better than a typ­ lite when putty is called for. Get the 'OTTWfc. to,, we. ical local example which, after EP-001 4 0z. Set $2.95 one and only original Sig Epoxolite- 5 years of use in a fuel tank, EP-002 8 0z. Set $4.95 not an imitation. never removed, is still like new Medium (.062 I.D. - .156 O.D.) and good for another 5 years. SH-288 (1 foot pkg.) $ .55 Experiences like this prove that SH-289 (25 foot roll) $10.50 our fuel line won’t harden in ^ SIG - KWIK-SET EPOXY GLUE Large (.092 I.D. - .187 O.D.) fuel or melt on a hot engine. SH-290 (1 foot pkg.) $ .60 Try Sig Silicone Heat Proof and FIVE MINUTE SET UP TIME SH-291 (25 foot roll) $11.50 see for yourself. Back when Kwik-Set appeared a on the market, a lot of mod­ elers bought their 5-minute SIG-BOND GLUE epoxy at the hardware store. But when our exclusive for­ ALIPHATIC RESIN BASE mula, specially designed for There’s no need to buy an aliphatic resin type of model airplanes, was made glue made by a non-modeling company. Sig-Bond available, that habit changed KWIK-SET comes from the people who know balsa and is in­ [POXY G lu t fast. So now everyone’s trying tended for model airplane use. A test in your work­ to get into the act. We’ve tried shop will confirm that this is a great adhesive for a lot of these products but general balsa wood assembly and construction, as Kwik-Set measures up and well as on joints involving hardwood. Good sanding more. TRY IT! YOU’LL STICK characteristics when used in external planking WITH KWIK-SET. seams. The plastic squeeze bottle serves as a self- contained glue gun. Get it all together with Sig Bond! KS-001 2 Oz. Set (1 oz. each A & B) $1.98 SB-001 2 Oz. - $ .75 SB-003 9 0z.-S1.79 KS-002 4 Oz. Set (2 oz. each A & B) $3.50 SB-002 4-1/2 Oz. - $1.19 SB-004 Pint - $2.98 KS-003 8 Oz. Set (4 oz. each A & B) $5.50

See your dealer first! To order direct, add $1 postage under $10. Postage free over $10. No C.O.D. Send $2 for the latest catalog of kits, accessories and supplies by SIG and other major companies. SIG MANUFACTURING CO., Inc...... Montezuma, la. 50171 from GONE TO WORK, STOP BACK LATER! Bill land to Redmond, Washington, has If you did not attend the WC at Taft announced the necessity of discontinu­ and get a copy, order yours now from N o r t h r o p ' * ing his model yacht sails manufacturing. NFFS Plans & Publications, 4858 Moore- His spare time has dwindled to the point park Ave., San Jose, CA 95129 USA. Price that he feels he can no longer handle is $10 plus postage. Book rate postage in w o r k b e n c h this "after hours” job properly. Fortu­ USA is $1, and 1st class (priority) is $2.25; nately for us, he will continue to write these rates also apply to Canada and the "Strictly Sail” column. His address is M exico. For Airmail to Europe, add • For the first time since starting this now 4115 172nd Ave. N.E., Redmond, $3.50, and to the Far East add $5 postage. magazine 8 years, or 96 issues ago, we WA 98052. Let him know what you’d like All payment must be in U.S. funds and are about to experience something that to read about in his column. payable to the NFFS. You may wish to is entirely new to us. This, the December order a copy of the 1979 NFFS Sym­ 1979 issue, is being “ put to bed'’ without posium Report at the same time . .. our presence! Although we are, at the FLASH price is $7.50, and the postage rates time of this writing, having all sorts of WINNERS OF 1979 FAI noted above apply for book rate and worry pangs, we are. . . er, attempting to WORLD AEROBATIC airmail. Support the National Free Flight write them off as “ first time nervous­ CHAMPIONSHIPS AT Society, an international fraternity of ness,” realizing full well that the other JOHANNESBURG, SOUTH AFRICA F/F. members of the crew can pull it off with INDIVIDUAL STANDINGS THINK SCALE! 1) Wolfgang Matt, Liechtenstein no more than the standard number of That’s the byword of the NASA (Na­ boo-boos that occur every month. 2) Dave Brown, U.S.A. tional Association of Scale Modelers), As mentioned in previous issues, we 3) Mark Radcliff, U.S.A. and the following message comes from are fortunate to be a guest of the South 4) Gunter Hoppe, West Germany its President, Bob Underwood,our "1 to Africans, who are hosting the 1979 R/C 5) Ivan Kristensen, Canada 1” columnist. Aerobatic World Championships in TEAM STANDINGS “ Dear Modeling Friend, Johannesburg. Although this would 1) U.S.A. “ The National Association of Scale permit us to return in time to be in on 2) Italy Aeromodelers is in its second year of the final days of closing the issue, we 3) West Germany operation. We presently have a mem­ have decided to make this our first 4) Switzerland bership roster of just under 400 and are vacation in eight years, and will “ tri­ 5) Liechtenstein becoming actively involved in the many angle” return by way of London, arriving areas of scale modeling, not only on a in Los Angeles on October 11. By the national level, but internationally as way, our other monthly duty, "R/C NFFS INTERNATIONAL PLANBOOK well. A very interesting sidelight of World,” will be more than adequately Conceived by Hardy Brodersen, NASA is that our membership comes filled by Sally Brown, who for the second edited by Dave Linstrum, and printed by from all three disciplines of the model­ consecutive year, has provided us with a Doug Galbreath for the National Free ing community: free flight, control line, fine account of pattern competition at Flight Society, this landmark volume is and radio control. In addition, unlike the Nationals. now available by mail order. It was some of the special interest organiza­ Hopefully we should be able to pre­ published as part of the F/F World tions, a large portion of our members fall Champs and contains over 109 drawings sent a complete account of the World in the sport classification.” R/C Champs in our January 1980 issue, (in 8-1/2x 11-inch form) of models flown If the above description appeals to and in the following month, Tom Hutch­ in that competition. The Nordic, Wake­ you, join the organization and help each inson will give us a detailed run-down field, and Power classes are well repre­ other. Dues are $5 per year, and can be on the Free Flight World Championships sented, and photos back up the techni­ sent to Bob at 4109 Concord Oaks Dr., St. at Taft, California. cal presentation of plans and text. This is CARR FURLS HIS SAILS a collector’s item and should be on any Louis. MO 63128. “ Strictly Sail” editor Rod Carr, whose serious F/Fer’s bookshelf. There are also AND IN CLOSING personal business recently brought historical articles and photos for O.T. The following excerpts are from an about a transfer from Annapolis, Mary­ fans. Continued on page 117

6 R/C MODEL BUILDER OVER THE COUNTER

• As you have probably noticed from sell for $99.95, motor battery and charg­ biggie was designed from photos of the recent ads, Kraft Systems is now market­ er not included. The battery is the same real plane and from drawings by Wylam ing an electric-powered R/C motor­ for either plane and retails at $24.95. and Pete Westburg. Wingspan is 94-1/2 cycle (!) and two all-foam electric R/C Now let's talk about the charger. It’s a inches. airplanes, a sort-of-scale Chipmunk and nicely made item with a clockwork timer After December 1, the plans will sell Cessna Cardinal. We have one of the and L.E.D., which indicates whether or for $30 plus postage. However, if you get motorcycles and Cardinals here at the not the batteries are indeed being your order in before then, the price is R/C MB office and have been having a charged. It plugs into the lighter socket $20 plus $2 postage. Plans are scheduled ball with them, and plan on doing in your car and will charge the afore­ to be shipped rolled by December 1. reviews on both in the very near future. mentioned motorcycle or airplane bat­ For more information, contact Bar­ The motorcycle is by far the most tery in 15 minutes. It comes ready to go ron's Scale Classics, 1213 Holly Spring intriguing of the lot, mainly because it's with all connectors installed. Retail price Lane, Grand Blanc, Ml 48439. so unusual; you’ve never seen anything is $24.95. like this before! Unlike your average Also relatively new from Kraft is the R/C car, a certain amount of skill is KP-3AS radio system, a logical extension Midwest has a new addition to its needed just to keep this thing up on its of the 2-channel KP-2A and KP-2AS series of Axiflo ducted fans. It’s the wheels. Too much or too little speed Sport Series radios. It was intended RK-20B, and is designed for high-per­ going into a turn, and it falls over just like especially for boats, gliders, or small formance .21 size engines such as the a target duck in a shooting gallery. powered planes designed for 3-channel K&B 3.5. Learning to drive it well is a real chal­ systems. A few of the features are open- This fan is different from previous lenge; you can’t do it right off the bat. gimbal sticks on the transmitter, plug-in Axiflo fans in that all the parts are already Maybe that’s one reason why the bike is crystals, plug-in receiver antenna, and a made and need only be assembled; it’s so appealing. choice of KPS-14IIA or KPS-15IIAservos. The motorcycle is officially called the They’ll let you have one for just $149.95. "Eleck Rider” and requires a 2-channel An optional ni-cd battery and charger radio for steering and motor speed kit is also available for $49.95 for con­ control. It sells for $79.95 in kit form, verting the system to ni-cds (it normally without motor batteries or charger. The comes set up for dry cells). batteries will set you back another From Kraft Systems, 450 W. California $24.95. We’ll talk about the charger in a Ave., Vista, CA 92083. minute. The Chipmunk and Cardinal are both completely molded from foam and Attention, all you Mammoth Scale fans require only assembly of the major out there! Looking for a real challenge? components . . . takes about an hour. If so, send off to Barron’s Scale Classics Radio installation takes another hour or and get a set of their plans for the Curtiss so. Our Cardinal impressed us as having F11C-2 Goshawk in exact 1/4-scale. The one of the cleanest molding jobs we’ve plans are full size, show all the patterns, ever seen, and we would assume that the and even include a construction manual. same is true of the Chipmunk. It is very Construction is all balsa and plywood. As docile and easy to fly and will run for 3 to we said, the model is exact scale, right 4 minutes on a charge. Both planes down to the airfoil section, size of the Five-cylinder running radial being offered require a 2-channel R/C rig, and both control surfaces, rib spacing, etc. This by Executive Engines.

DECEMBER 1979 7 not a builder's kit like the earlier Axiflo includes an aluminum engine mount, Cylinder liners are cast iron. Pistons are fans. There are only five major pieces in 7-1/8 inches wide, pre-drilled and aluminum with 2 cast iron rings. Valve the whole unit, these being molded tapped and complete with all mounting guides and seats are phosphor bronze. from ABS plastic, nylon, and glass-filled bolts. Another accessory is a Norco The crankshaft is supported by 2 ball nylon. A 4-1/2 ounce fuel tank is integral Cable Connector, specially adapted to bearings and the cam assembly by 2 ball with the unit, which should give a run of the engine, for use with standard 3/16- bearings. The master rod rides on needle several minutes. The fan is complete inch cable. The Norco connector goes bearings.” with hardware, instruction booklet, and for $5.95. The five-cylinder engine has .96 cu. full-size drawings. Interested boaters should write to in., the seven-cylinder version 1.35 cu. The RK-20B is claimed to put out 4 Aeromarine Enterprises, 709 Longboat in. Average weight is about a pound and pounds of thrust (not bad at all!) and has Ave., Beachwood, N) 08722. a half. The rpm range for both is listed at been tested in several different designs. • * * 1,000 to 5,000 rpm, although the size In addition, Midwest plans to produce a prop being used was not mentioned. kit for an airplane called the “ Jetster 20,” Whoopee! V-2 and V-3 size spark plugs are again available! Take a look at Each engine is test run at the factory an all-wood sport ship designed by Dick before being shipped to insure that each Sarpolus especially for the RK-20B. We’ll the ad on page 114. Prominent antique engine collector Dick Dwyer, of Replica one is in perfect working order. let you know when it becomes available. Engines, has made arrangements with Whether or not the running radials If you’re interested, write to Midwest are rugged and reliable enough to be Products Co., 400 S. Indiana St., Hobart, NGK to produce a number of 1/4-32 spark plugs. Dick sent us a couple to try practical for the average modeler, only IN 46342. out, and while we didn't have time to do time will tell. Introductory price of the a test, we have to say that they are five-lunger is $685, or $785 for the seven. beautifully made and well worth the You can also get the engine with the Aeromarine Enterprises sent us a asking price of $4.95. Modelers who crankcase, cooling fins and engine poop sheet on its new Sea Tiger engine, have tried these plugs state that they mount anodized black, for an extra $50. designed for large R/C boats. Displace­ perform very well indeed. To learn more, write to Executive En­ ment is 1.35 cu. in., and although it The plugs are available now from gines, 16650 S. 104th Ave., Orland Park, wasn’t specified, we suspect that the Replica Engines, 14600 Ramstad Dr., San IL 60462. engine was adapted from an O&R indus­ Jose, CA 95127. trial engine. The Sea Tiger is available set up for either ignition (8,000-9,000 rpm) * * * Jim Crocket isat it again! Freeflighters or glow (11,000-12,000 rpm). The engine It’s now official: the running radials know Jim as the fellow up in Fresno, is really well built, with roller bearings being produced by Executive Engines California, who makes all sorts of hard- throughout. The ignition version hasa 3- are finally available for public consump­ to-get and many one-of-a-kind items for pole magneto and fully enclosed water­ tion. And from the photos we’ve seen, various types of free flight models. All of proof points. The engine comes com­ they look pretty darn good. They are Jim’s products are of first class quality, plete with male and female universal available in five and seven-cylinder and his newest offering is no exception, joints. versions and are four-strokers, which although this time it has more to do with The Sea Tiger can be purchased with a accounts for the more than 300 compo­ the flier than the model. What it is, see, is recoil starter for $129.95, or for $275 with nents in each one. These engines are a "Survival Kit," a zippered bag and belt an Eastcraft Specialties' Lectra-Starter built to last, as attested to by the follow­ that is worn around the waist and which already installed. No extra servo is ing, quoted from the factory info sheet: can be used to carry all sorts of good needed to operate the Lectra-Starter, "Crankcase, cooling fins, pistons and things. . . a can of beer, tools, a can of and one charge on the ni-cd batteries cylinder heads are machined aluminum. beer, rolls of film, a can of beer, your will give 50 to 75 starts. Crankshaft, cam, cam followers, rocker lunch .. . maybe even a can of beer! Optional equipment for the Sea Tiger shafts and valves are hardened steel. The bag has a removable inside liner

Jim Crocket's "Survival Kit." just the thing for thirsty free flighters. "Seguin" steam tugboat kit from The Laughing Whale.

8 DECEMBER 1979 The Sea Tiger, a 1.35 cu. in. engine for large R/C boats, from Aero· Latest offering from Bud Barkley, a 1 /4-scale dummy pilot, marine Enterprises. that keeps things hot as well as cold. The a first-come, first-serve basis. Retail inches, area 503 sq. in., flying weight is bag itself is a rust color, the belt and liner price is $97.50. By the way, this company 3-1/2 lbs., and the ship will fly with .19 are gold. The Survival Kit is presently has an extensive line of R/C boat kits and to .45 size engines. Construction is all available direct only. Introductory price Ians. Why not write and see what they balsa and plywood, but that’s all we can is $19.95, plus $2 for handling and ave to offer? The Laughing Whale, Box tell you, as the info sheet states that shipping. California residents add 6% 191, Wiscasset, ME 04578. there are “ A lot of surprises in this kit. sales tax. Order from Jim Crocket Repli­ We will not tell you so you will be cas, 1442 N. Fruit Ave., Fresno, CA 93728. surprised and also amazed.” You'll have to check it out yourself at your local As is evident by one of our photos, hobby shop. there is yet one more 1/4-scale dummy The Quikray 500 goes for $47.95 and is That neat steam tugboat in one of the pilot for modelers to choose from, this now in full production. Find out more (if photos is a product of a company called one being made by Bud Barkley’s Vin­ they’ll tell you!) from Andrews Aircraft The Laughing Whale (no joke, that's tage Models. It comes in two pieces, as Model Co., U.S. Route 1, Topsfield, MA really the name of the company!). The most dummy pilots do, and includes boat is a 1/4" = 1' model of the “ Seguin,” material for making a scarf and a bit of 01983. · the only wooden steam tugboat left in fur for his jacket collar. .. really adds the the country. The kit is exact scale finishing touch. Also included is an SAFE FLYING throughout and can be powered by a excellent rundown on how to paint him small steam engine or electric motor and for a realistic appearance. Retail price is guided by R/C. The kit features plank- $10.95 (gulp). It’s a product of Bud on-frame construction, complete plans Barkley’s Vintage Models, Rural Rt. No. and instructions, material for the deck, 4, Smiths Falls, Ontario, Canada K7A 4S5. cabin, keel, rudder, spars, etc., and a complete fittings set that includes the * * * prop, shaft, log, stanchions, running Rounding out the list this month is a lights, steering wheel, lifeboat, davits, new kit from Lou Andrews, his first in stack, whistle, blocks and rigging cord. what seems like quite a while. It’s called Sounds like a mighty complete kit! the "Quikray 500’’ and was designed Overall length is 26 inches, beam is 5 with Quickie 500 and AMA Sport Pylon inches. Racing events in mind, and looks about The Seguin kit is being produced in what you'd expect a high-wing Quickie limited numbers. Orders will be filled on 500 racer to look like. Span is just over 50

"Quikray 500" racer and sport model from Lou Andrews. Midwest's new Axiflo RK-20B ducted fan for .21 size engines.

R/C MODEL BUILDER 9 PHOTOS 8V AUTHOR AND DICK PENROD Dave Brown, 1st in Masters, picks up his AMA Dave Brown and his wife, Sally, with their Tiporare. Uses an O.S. 61 FSR and 7-channel World and NSRCA trophies from Jim Vanderbeck. Engines radio. Dave had some problems on Friday, had to land without ailerons (see text).

- a * a L in ť P , lPanmrSIwr η·ί. m -a η*. a. Dit> m r.-n. μ 2 nt. n 1 VVtkw* l>*nWi p.vfw Λ Irrm/lwfitlm! Tříbil C g r W O R L D •J· aa a & i W t ! Urt, m tt kNrtcvnnVVwTir P-41N λ P.Bil (,Wf»««k r/'c. i. I ftsrlUw»*, 7ΛΧ.Λ 27 LV.WI »1 This month, Sally Brown takes over for an absent Bill Northrop with a ■p ■i LAÖWr· ťun AM C Λ IVwuA Tkwr. íf«· tJ blow-by-blow report on the R/C Pattern competition at the '79 Nats. t tn. u »v)ťini* 1'rartry /bUM :ti IWvW.- n*. m • NATS! How I do love the Nats! People, 11 >NH M>4M planes with radios, planes with lines, old tZMaiL T W i i ^ t £j(3n0"j.'iht Mal s> IWnVi.lk-S nxu friends, planes that are fast and sleek, !i U ' a _. ·»» 1 IA gliders that are quiet, helicopters, new friends, free flight, buying, selling, trading, helping beginners, talking- . [|7 Κλ Ι Τηούη Λ Μ A talking- TALKING, stimulating, frus­ ri Char V Λ«* ·. TT* Η trating, time consuming, happy, tired, η torwCHl 77» 1- glad-we-came-to-the-Nats-again feel­ Great way to set up your lines so that every ings. I am always amazed coming home pilot can see just where he is in the rotation. from the Nats at the variety of people Saves a lot of questions, also saves having and events which take place during that to call the pilots to the line, as they can see when they are due to fly . Somebody week in August, and although there are was really thinking! "discussions” and even a few arguments, the overall feeling is one of helping one thought!). After traveling around the another and cooperation. It is a rather airport for half an hour amid grumbles good feeling, especially when you get about signs not visible, we finally stopped home and pick up the newspapers and at the National Guard post for directions. It seems we were on the wrong side of read about the ten murders which took Carl Goldberg never misses the Nats. Hope he place while you were gone. didn't travel all the way on that thing! the airport and had to get back on the This year’s big event was held in highway for another couple of exits. We Lincoln, Nebraska, and its emblem was found out, were the people ... as did this and found our way to AMA an ear of corn, which we soon found out friendly and helpful as any we've met. headquarters, where we greeted them was very appropriate .. . miles and miles Dave, the kids and I packed up our with “ Where the H .. .’s the signs?” It of corn wherever you looked is what camper and left Cincinnati for Lincoln seems AMA had put the signs up twice, Nebraska is made of, on first glance. On on Friday, July 27. It took us approxi­ and it also seems an overzealous en­ second glance you see lovely state parks, mately 16 hours to reach our destina­ vironmental agency had taken them lakes, beautiful rolling hills with stately tion, but finally, on early Saturday after­ down within an hour! They had a call in old farmhouses. It did my definitely noon, we saw the airport signs and to the state department and eventually a country New England heart good (some­ rejoiced as the trip was almost over (we thing about taking the girl off the farm but not the farm out of the girl). Anyway the state is beautiful and so, as we soon

Mid-air! Bailey Reese's Curare (left) and Mark Doucey's Dirty Birdy came together with spect­ Bill Seidler presents Dean Koger (left) with acular results. The Curare is somewhat intact, but write off one Dirty Birdy. his trophy for 2nd place win in Masters.

10 R/C MODEL BUILDER Note the similarities in Joe Gross's Thunderbirds (in background) Ron Hesselbrock in deep discussion. His plane is a Tiporare. soon to and Dean Koger's EU-l's. All beautiful fliers. be an R/C MB construction feature. everyone was friends! All flying that would be done on the » site (helicopter, soaring, free flight, and indoor were all off the base) would be done within easy walking distance. All the control line events were along one side and behind AMA headquarters. In front of AMA headquarters was a large (very large!) cement area (it was an old taxi ramp), and all R/C flying was done there. Quarter Midget was scheduled for Monday-Wednesday morning from 8 a.m.-1 p.m., Pattern qualifying Mon- day-Thursday 2 p.m.-8 p.m.. Formula I Thursday-Saturday 8 a.m.-l p.m., Pattern finals Friday and Saturday 2 p.m.-5 p.m.. Roy Speights flew this Rossi-powered Curare Scale 5 p.m.-8 p.m. those evenings and to 5th in Advanced. Sunday morning. All of this took place Joe Brief ■ placed 5th in Masters, shown here within four hundred feet of headquar­ accepting trophy from Bill Seidler. few signs were allowed to remain! I had ters! Some change from Lake Charles. a good laugh and decided this trip would be worth it after all. Sunday (July 29) was transmitter pro­ The site was an old military base which cessing for the Pattern people, so atten­ had been made over and added onto, dance really began to liven up. Dave and until today it has a large Air National I helped process, and it really is fun .. . Guard unit there plus a reasonably busy you get to see every Pattern flier there. commercial airport plus many and We ended up with approximately 140 varied small businesses in what were old Pattern fliers, with the breakdown to military buildings. We even had a fire classes like this: 63 Novice, 30 Advanced, station next door to AMA headquarters. 23 Expert, and 24 Masters. This was down AMA headquarters was in fact an old fire some from Lake Charles in 1978, where station. AMA had many small and we had nearly 160, and I was amazed at medium rooms for doing various chores, the names missing: Chidgey, Helms, a medium large room which held a small Radcliff, Lowe, Oddino, Kimbro, to concession area and where all airplane name just a few. In fact, in looking back and transmitter processing was done, over the Masters Tournament list, only then a larger room for their AMA booth, about 14 of those 36 fliers were at the information, bulletin boards and scale Nats. I realize that for many of them it was a work-vacation problem, but we cages. This was quite a bit smaller than in Sally Brown was awarded an NSRCA plaque years past, but adequate as long as Continued on page 113 for all her work in that organization.

Tim Just, 1st in Novice, flew a Deception Brian Crosslev, 1st in Advanced, flew a Cliff Hiatt, 1st in Expert, also flew a Boot­ with Rossi, Kraft radio. Bootlegger. Rossi, Kraft. legger but with OPS engine, Kraft.

DECEMBER 1979 11 PHOTOS BY CATHY UNDERWOOD U.S. Precision Scale team for the 1980 World Champs, I to r: Bob Underwood with his Hiperbipe, Bob Wischer with his Piel Beryl, Hal Parenti accepts congrats from Sid Axelrod for his 3rd place win and George Rose with his P6E. in Sport Scale. Bearcat will be a future Top Flite kit. AT THE TO 1

By BOB UNDERWOOD NATSi

THE 1979 NATIONALS Elsie Abel and family, took care of the open age members to be found in R/C The fields of corn that surround it AMA Cub (Delta Dart) program, which finds it refreshing to watch youngsters cannot hide the little big city that is covered a three-day period. In addition, doing their scale thing. One might point capped by an unusual, towering capital Dad was supposed to be competing. As a out a variety in sexes as well; however, building. Unlike the normal squat, result, some of the coverage got a little nature seems to have limited that some­ domed structures we so often see in the thin at times. what. states' central city, the Nebraska govern­ Scale is really an all-week affair, While there were standard types of ment center soars skyward, topped by a starting early with indoor and stretching models represented, some adventurous 19-foot statue called the “ Sower.” all week to the very last day. This was the souls moved into those difficult and The Nats week this year enjoyed the first opportunity for us to see indoor unusual areas. Two examples that come fine hospitality of Lincoln, excellent scale, and it was super fun. Several things to mind are the Bristol Type 2 biplane of dormitory facilities at the University of come to mind as being significant about Bill Stroman and the Martin Baker MB-2 Nebraska, and for the most part, good the competition. The most important is of senior Guy Larsen. It was intriguing to weather that while "warm,” did not certainly the age span represented. The watch Guy's MB-2 "roar” from the floor show complete evidence of the fact that person accustomed to the almost all and cruise at a relatively high speed, neighboring Omaha is one of the five windiest cities in the U.S. The phrase "for the most part” has a real meaning for the scalers, since the "best” wind was saved for Saturday, when both C/L and R/C were flown. An unfortunate aspect of this was that since C/L was flown on one day only, the FAI team for the Internats in Canada next year was se­ lected in a very strong wind. But we’re ahead of ourselves! This article will encompass not only R/C but what we could cover in free flight and control line as well. This proved to be a difficult task for the Underwoods, since we were responsible for the AMA Sou­ U.S. Sport Scale team for Ottawa in '80, I to r: Ralph Jackson with his Windecker Eagle, Hal venir sales, and along with Dave and Parent! with his Bearcat, and George Buso with his Piper Navajo.

Garland Hamilton's Corsair was a victim of radio interference while Bob Karlsson just missed getting on the U.S. Sport Scale team with it was on the ground, took off by itself and clobbered a fence. his PT-22, placed 4th.

12 R/C MODEL BUILDER Two Hiperbipes... one's just a little bigger than the other. Alas, Bob Underwood's Hiperbipe is no more, a victim of deliberate radio interference on the last day. A new one is under way. George Buso accepts 1st place Sport Scale trophy from Scale Director John Preston, who was also in charge of F/F Scale events.

George Buso's Piper Navajo is a fairly large airplane, weighs 15 lbs. Two Webra Blackhead ,60's move the 83-inch airplane at a rapid rate. many spectators seated in the audi­ flight while perhaps sacrificing some Bob Wischer (right) accepts 1st place Precision torium enjoying not only the scale static points, or achieving a super scale Scale congrats from John Preston. It's on to Ottawa in '80! flights but the Easy B and Pennyplanes effort knowing the flight might be that were softly bouncing off the smooth marginal, and exploring the unusual compared to other types, in large sweep­ ceiling. Even though many were non­ types, each person worked hard at ing curves. I had just happened into the modelers, they appreciated the flight making it a memorable event. Larsen’s area prior to the flight and I had achievements and registered their ap­ I regret that I can provide no color the feeling that Guy’s dad, Vic, felt there proval with vigorous rounds of applause. from the outdoor free flight scale event, were a mite too much winds packed into As they moved their models from center since other duties prevented my being the low-winger, but it turned out fine stage, some of the successful modelers there. From what I understand, though, and the happy faces punctuated the seemed almost embarrassed at the there was a good deal of wind and the success as the timer called it official as spontaneous feelings of appreciation. site did not lend itself well to scale the model was still going up. Several of the flights, such as those of competition. Dan Domina and Clarence Mather, The control line competition, as noted Watching Bill Stroman enjoy himself went to the ceiling. It was intriguing to with the spidery Bristol was equally earlier, was plagued with the modeler’s watch the little gems slowly circle curse, wind. It is most unfortunate that great. The early trim flights contained upward and bounce gently against the some of those unstable elements that this should happen, since the control black. Dan’s model often set up an line entries were up with some 18 sport make one hold his breath. Then, gradu­ unusual oscillation that gave one the ally, the biplane was brought into trim in scale models and 11 precision scale, 7 of feeling that a miniature student pilot which were open entries. the very warm, humid air of the audi­ aboard had contracted a case of slow torium. Bill was frequently hatted, since motion hiccups. The wind hovered in the 15-20 mph he claimed the flash glare off his shiny, area all day from the 8 a.m. start to the perspiration-dotted pate made pictures Through all of this one could sense the 5 p.m. cutoff. Of those who made an difficult. dedication of each modeler. Whether attempt, most executed shortened or We were greatly pleased to see the the attempt was to wring out the longest aborted flights, and damage became

Earl Thompson's outstanding Focke-Wulf 44 placed 4th in Precision, Precision Scale static judges Bob Karlsson, Le Roy Weber, and Bill is the alternate for the U.S. team in 1980. Knepp giving Bob Wischer's Piel Beryl the once-over.

DECEMBER 1979 13 Another unusual entry, a Bristol Flying Lab­ oratory by Bill Stroman. John Preston photo. official flight, you take it, since no flight Condenser paper really shows the structure on Dan Domina's Cub, 1st in Indoor Scale. Guy Larsen with his very rare Martin Baker order is set up. It was obvious to many MB-2, 1st in Sr. Indoor F/F Scale. that the early flights were marginal. The to first in Jr./Sr. Sport Scale. She had, as hope then was that the wind would my girls described it, a "little tiny plane’’ almost a way of life. The models which die later, and so a waiting game began. which we believe was powered by an were flying on many multi lines, such as This is, of course, a great source of .049 on monoline. Kathy had her hands Ralph Burstine’s F4B-4 with its five frustration to everyone . . . contestants, full in the wind, but managed it sans lines, suffered from the monstrous drag officials, and spectators. It was just throttle and all. created. shortly before five that Ken Long made Dan Abel had the conversation piece his official flight that bested Dan Of the seven open precision scale with his 12-V2 lb. ducted fan Mig-15. Osdoba’s earlier flight. Hopefully, ar­ While he made an attempt, the model entries, only five made official flight rangements can be made next year to fly attempts. Mike Gretz topped the class did not make an official flight. During two half-days in an attempt to overcome the effort, various and sundry parts such with a total of 543.2 points to once again Mother Nature's slaps. lead the FAI team for 1980. Keith Trostle, as gear doors, etc. were shed about the flying an MB-5, was second with a total Sport Scale competition resulted in a circle. It is great fun to watch the starting of 473.8, and Ken Long and his Betty lower percentage of scalers making an procedure, since it appears that the Mig Bomber finished third with 470.5. The attempt, with only five out of the 10 is swallowing Dan’s dad, Dave, who alternate is Dan Osdoba’s Zlin, with open doing so. Interestingly, all eight of reaches clear down the model from the 428.8 points. This competition for the the Jr. and Sr. contestants made one or nose to place the starter against the team places became a war of nerves. The more official flights. K&B 7.5. control line competition is set up in a Two youngsters provided some inter­ Dan had volunteered to fly in the manner that when you are ready for an est for the day. Kathy Kirn flew a Bonanza Sunday airshow, and he and his dad worked until 1 a.m. to get it back into shape to fly. Sure enough, on Sunday afternoon, the show included a com­ plete flight much to the delight of all. (Not the least of whom was Dan.) A note of concern was sounded with the entry of several profile fuselage models. The controversy developed as to whether they filled the spirit of the rules, even though they may meet the letter of the rules. While they were at first disqualified from competition, this was later reversed on the basis of, first, the specific rule used for the disquali­ fication not seeming to apply, and Shades of "Jaws"! Dave Abel starts the K&B 7.5 in his son Dan's Mig 15 C/L model. Ship weighs secondly, that they had competed in 12-1/2 lbs., uses a Scozzi fan. An ambitious project to say the least! Continued on page 84

Mike Gretz's PT-19, 2nd in Sport Scale C/L. Ground handling proved A 3rd place win for Keith Trostle’s Martin Baker MB-5 earned him to be a real problem in high winds. a place on the 1980 U.S. C /L Scale team. Had highest static score.

14 R/C MODEL BUILDER INSTRUCTOR

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

Twas the new Christmas issue year’s masterpiece. Among the most to enable me to carve the appropriate And here at my place common mistakes I see is in the carving angle on each control surface. I made I was racking my brain and hinging of control surfaces, and I’ve my jigs out of maple on a tilt-arbor Trying to fill all this space decided to cover this in the column this tablesaw, and they have held up well When all at once month. To begin with, many modelers over the years. The cross-section of I heard such a clatter seem to think that a rounded joint is the each is shown in Fig. 2. 'Twas the mailman at last correct way to join the control surfaces The elevator and rudder jigs are faced I hope with a letter to the stab, fin, and wing. Inthe old days, with a piece of sandpaper to keep the I ran to the mailbox and hoped fora pair when we used cloth hinges, this was surface from slipping while you carve But I came back downcast and full of true, but today with the flex hinges or the bevel on them. The aileron jig dispair pinned type hinges, the rounded sur­ doesn’t need the sandpaper, as on it we "Some day I'll get smart and give up faces tend only to bind up the control simply shim the trailing edge of the this column" surfaces. Fig. 1 shows the wrong and the aileron parallel with the base of the jig I said with a voice slightly crackling and right way. and carve away. The use of the aileron jig solemn. I have said many times that it is is shown in Fig. 3. C’MON, GUYS, important that you get a tight seal The elevators and rudder are done in a SEND ME SOME LETTERS. between the control surfaces and the similar fashion, except that due to the (I want you all to know that the typist- surface they are hinged to. In order to fact that they are usually tapered, they wife had nothing to do with that!) accurately carve the bevel on the lead­ must be aligned by eyeball using a small ing edge of the control surfaces, I use a straightedge. Start by drawing a center As the Christmas season nears it is not few simple jigs which I have made up as line on the leading edge of the surface to only the season to be jolly but also the carving guides. I have three different be carved, then align it in the jig as per season when one should be getting jigs, for the ailerons, elevators, and Fig. 4 and carve and sand in the same way down to the basement to create next rudder. These all have different angles as the ailerons. This system works best if you can mount the jig in a vise so you can hold the surface securely while carving. If it slips, realign it before continuing. Once you have accurately carved the leading edge bevels, it is important that you install the hinges so that the pivot point is exactly at the apex of the bevel, Continued on page 108

FIG. 3 DECEMBER 1979 15 A5AVIGILANTE By PAVEL BOSAK . . . Jet models don't all have to be ducted fans, nor do they have to look strange with an engine and prop in the nose. From Czechoslovakia, an interesting example for .40 engines and sharp pilots. • After testing a pusher engine on a matic flight control system of the Vigi­ Maximum speed at sea delta model and conducting experi­ lante was the top electronic system in its level: 1,260 km/hr. ments with this concept on the model time. In the case of airplane A3J-1, new Service ceiling: 19,500 meters L-39 Albatros, which was published in construction techniques were intro­ DESCRIPTION OF MODEL the January 1978 issue of RCM, and after duced, and the airplane was used in the The model is made for a .40 engine; the great interest shown by model development of the Navajo B-64 pilot­ that is why its measurements are not big. builders (I received a lot of letters not less missile. Another constructional Thanks to its sweptback wings it is also only from the U.S.A. but also from specialty was represented by the some­ space-saving. That is also the reason why Europe, Brazil, and even from Singapore what unusual way of throwing bombs the wings are not removable. The final and the Philippines), I wanted to build backwards from the long tunnel bomb result is a far lighter and more compact another model of this same concept. I rack. In 1962, the designation A3J-1 was model. In comparison with an authentic decided to build a semi-scale model of changed to ASA. In the same year ASA scale aircraft, net wing area and elevator the A5A Vigilante, which best suited my airplanes appeared on the deck of the area are larger. Some unimportant concept. aircraft carrier Enterprise. The develop­ details are also left out. In spite of it, the The development of the full-size ment of the Vigilante went on in ver­ model looks elegant and is very impres­ Vigilante began in the later part of the sions ASB and RA-5c. These types are a sive in flight. fifties, when the U.S. Navy needed a little bit different in shape. Because of a CONSTRUCTION carrier-based plane which would be new fuel tank location, the shape of the Begin the construction with the fuse­ able to transport an A-bomb. The first upper fuselage part was changed. lage sides. There are four altogether; prototype was called the Vigilante YA MAIN TECHNICAL DATA two inner longer ones and two outer 33-1, and its maiden flight was on the Wingspan: 16.15 meters shorter ones. The inner sides are 31st of August, 1958. The first four planes Length: 23.25 meters strengthened with full-length plywood were in use by flight VAH-3. The auto­ Maximum speed: 2,230 km/hr. doublers, the outer ones in the place

Pusher engine installation in the Vigilante. Notethat each elevator The author prepping his bird for a flight. Highly unusual model has its own pushrod, cables used on original model. draws much interest wherever it is flown.

16 R/C MODEL BUILDER where the main undercarriage blocks are located. Cut the fuselage formers. On former F4 fasten the nose wheel leg and to former F6 attach the engine mount. Epoxy the inner sides and form­ ers together. Epoxy part of the fuselage bottom in place from the notch on the outer sides to about 4 inches aft. Epoxy the main undercarriage mounting block in place. Epoxy the half-finished fuse­ lage and outer sides together, as shown on the plan. When doing the top and bottom sheeting, epoxy the wood with the grain going across the fuselage. Whey dry, attach the main undercar­ riage so that your model can stand. Now do the front bottom part sheeting between the inner sides and also epoxy Half-fin ished basic framework. Long nose permits placing radio gear far enough forward to the nose in place. It can be cut from hard compensate for the engine in the tail. A very short-coupled model! balsa or from spruce. Do not try to save weight in the nose. Now close up the top fuselage part as far as the end. The outer sides must be a little bent in the rear fuselage part, and this we can do by epoxying a cross-grain balsa strip in the rear bottom fuselage area. According to the plan, build the stab and fin. Both of them are of the same construction: a balsa frame covered on both sides. In the rudder there are also spruce spars which go as far as the fuselage bottom. Sand the stab and fin and epoxy them to the fuselage. Cut a hole for the stab in the outer sides and in the inner ones cut a groove in the balsa Installation of Futaba radio in the prototype. Switch is mounted in hatch, a good idea... if as deep as the plywood doublers. Cut a nothing else, it keeps the hatch from getting lost. hole for the fin in the top fuselage part. Now epoxy the stab and fin in place. some extra weight into the nose, and nipples. Epoxy inside the top hatch a Now it is time for the wings. Accord­ thus the model’s weight is higher. strip of plywood and also the windows. ing to the plan, cut ribs and the web When pushrods are dry, finish the Now sand the whole front part of the W10. Epoxy ribs to W10 and at the same fuselage and wing sheeting. Epoxy the fuselage and cover the whole model time epoxy the spars in place. Cut wing tips in place, and also the fin. Now with thin tissue. Make the mold for the notches in the inner and outer fuselage cut from harder balsa the engine cowl, canopy and form your own canopy in a sides so that both wing halves meet in which is gradually formed into a cone. vacuum-former such as a Formicator. the fuselage center and rib W1 touches Finish up the balsa front fuselage sheet­ Now epoxy the canopy in place. For a the outer fuselage side. Epoxy plywood ing. Sand the whole model. Cut off the more realistic appearance you can place triangles W10 to the center of the webs. top front part of the fuselage; thus we a figure of a pilot in the cockpit. The last When dry, epoxy leading edge W9 and get a removable hatch for battery, job is to cut the rudder, ailerons, and trailing edge W11 in place, then make servos, and receiver. Sand the hatch elevators from balsa and fix them in bottom wing balsa sheeting. To our half- edges and epoxy plywood strips in place with nylon hinges. finished model add the tank, servo rails, place, as shown on the plan. After PAINTING THE MODEL servos, and pushrods. You can see on epoxying these strips, put the hatch back The whole model, when covered, is the plan how to place the pushrods and on the fuselage, but between the edges painted with clear and colored dope. servos. The tank in the original model is place a thin piece of plastic wrap so that Lines imitating sheet metal are done laced at the center of gravity. This is, these two parts do not become glued with drawing ink. This is surely not the owever, made possible by an engine together. While the whole thing is only method of painting, and anyone with pump or in-line fuel pump, such as drying, bind a rubber band around it. In can choose his own. The color scheme that by Robart. If you do not want to use the places where the hatch is held, on my model does not exist on any full- a pump, place the tank in the rear epoxy two threaded bicycle spokes in size plane; it is a combination of various fuselage part, but then you must put place. The whole hatch is held by two color schemes of different types. As a base for an original color scheme, use a magazine with a published description of the Vigilante. ADJUSTING AND FLYING THE MODEL Install the receiver, pushrods, and engine. Solder the wheels on and check if controls move smoothly. Put some extra weight into your model if neces­ sary to achieve the balance point. The engine has no side thrust, but does have 2° of downthrust. Now adjust engine throttle action. As a muffler you can use a Muffl-air or a standard muffler turned against the flight direction. In contrast to standard models, the pusher propeller is Air inlet ducts are open all the way down the fuselage, provide cooling air to the engine. Engine doesn't get cooled unless the model is moving, so don't spend too much time on the ground. Continued on page 99

DECEMBER 1979 17

FULL SIZE PLANS AVAILABLE - SEE PAGE 116 DECEMBER 1979 19 Quarter Midget flight line at the '79 Nats. Almost all are Prather Loren Holm provided a portable micro computer that provided heat Little Tonis. data, times, and standings at end of each round.

pylonJOE KLAUSE A T T H E 79' 7 NATSl i f l i g PHOTOS BY AUTHOR UNLESS NOTED ^ ™ ™ ™

• Some years ago, the Marx brothers some observations together with the by Kevin Nelson, of Waterloo, Iowa. It clowned their way to success in a movie nitty gritty numbers. was modeled after a pre-WW II, V-tailed titled "A Day At The Races.” During Nats QUARTER MIDCET European Buggatti. As you can see in week, there were six days of pylon races, Following the same practical schedul­ one of the accompanying photos, it's but there was no clowning around. ing of previous years, the Quarter quite a change of pace from the typical These guys were serious, and in their Midget rounds were held on Monday scheme of things, they were eminently through Wednesday. This year, how­ successful. Fine pilots, mechanics, and ever, Loren Holm, of Quincy, Illinois weather together with acres of smooth provided a portable microcomputer to concrete and competent officials . . . assist in organizing and promulgating what more could anyone want? Ob­ data for both Quarter Midget and viously, it was a good week. Here are Formula I. Within minutes of the end of each heat, there was a computer print­ out of the heat data ready for posting. Upon completion of a round, the print­ out included the overall standings and low time. Not only novel, but certainly very useful. Next time, Loren hopes they’ll also let him generate the matrix. As usual, there were several instances of instant rekitting. However, one of them generated a little extra attention. This time, someone planted his plane just about straight in, right between the number two and three pylons. You can easily appreciate that the adrenalin Bob Sonheim (left) helps Kim McLure refuel flowed heavy with that one! his really nice Prather Little Toni, powered What else was unusual? Well, one John Kilsdonk placed a very creditable 10th by Rossi .15. thing that caught my eye was the entry in only his second try at Nats Q-M.

Q-M impound area. That strange-looking bird in the foreground is A slightly damaged but repaired racer. Cartoon style markings read, a pre-WW II Buggatti racer by Kevin Nelson. "Oh Nooooo! Repairs by Mr. B ill."

20 R/C MODEL BUILDER Formula I flight line. Some really beautiful ships were entered this Eric Meyers, Champagne, IL , takes a break inside his trailer, equipped year. Total entry count was 56. with tools, workbench, the works. A workshop on wheels! envy those judges who must decide the handicap line-up? Sometimes it almost seems that it has to be a mental toss of a coin to give the nod to one aircraft over another one. If you think I’m exaggerat­ ing, take a look at the photo of Dennis O ’Brien's extraordinary Polecat. He was second in line! As mentioned, flight competition was intense. No one established supremacy, and nothing was settled until the tenth and final round. When it was over, here’s how they stood: 1) Bill Preis 39 2) Dave Shadel 38 3) Eric Meyers 37 4) Bill Grove 37 5) Jim Moorehead 36 Gary Hover, San Luis Obispo, CA, with Terry Tigre powered Prather Toni, 10th in F1. 6) Barrett Clay 35 7) John McDermott 35 Quarter Midget. 8) Ron Gilman 34 By noon Wednesday, the last round 9) Dave Pearce 34 and flyoffs were over. Here are the final Dennis O'Brien’s Polecat was absolutely im 10) Gary Hover 33 standings after the nine rounds: maculate, was 2nd in static judging. Congratulations to Bill Preis for his 33-Vi very consistent performance. Ironically, 1) Wayne Yeager ciety) came to the Nats. All four finished 2) Lyle Larson 32 his one second place finish in the fifth in the top ten .. . first, third, fifth, and round was his fastest heat time (1:18.7); 3) Dennis Sumner 31 tenth. Not too shabby by any standard. 4) Jimmy Bartels 29-Vi he simply was not flagged off first. FORMULA I Fastest overall time was 1.17.9 by Jim 5) Kenneth Heatlie 29 There were fifty-six entries this year. 6) Dave Pearce 28 Moorehead. The top ten of them finished within six In summary, it was quality competi­ 7) Don Fuller 28 points of each other. That’ll give you a 8) Richard Steine 27-Vi tion throughout the week. Friendships good idea of the quality of the flight were made and renewed, and chances 9) Douglas Brueshaber 27 competition. But let’s not forget the 10) John Kilsdonk 27 are that more than a couple said. “ Wait handicap judging. Who could possibly A couple of other comments: Fourth until next year.. · place Jimmy Bartels, a Senior, certainly deserves special mention for his very professional effort. Similarly. Wayne Yeager merits a kudo for his fast time of 1:31.8. Finally, four members of the CAPS (Canadian American Pylon So-

Bill Preis (right) won 1st in Formula 1 with 39 out of a possible 40 Second in F1 was Dave Shadel (left), Vista, CA, with 38 points. points, used an S.T. X-40 in a Toni. Only 6 points separated the top ten entries.

DECEMBER 1979 21 + EXCALIBER Π + By JE R R Y DUNLAP . . . This fully competitive outboard tunnel-hull racing boat by our "R/C Power Boats' columnist has been winning races and setting records since early 1977. It's the first to go over 40 mph. • The development of the Excaliber That record has since been broken a model outboard design has been some­ number of times. I used this same boat what of an evolutionary process cover­ for racing during the spring and early ing the last three years. Since finding summer of 1977 with pretty good results. one's roots has become a rather “ in” However, I could see that the boat was a thing recently, let me take a little time little bigger than it needed to be, and its to trace the roots of the Excaliber II potential was limited. model outboard tunnel. In July of 1977, three weeks prior to The original Excaliber concept was the 1977 NAMBA Nats in Reno, Nevada, developed by a good friend of mine, I contacted David about redesigning the David Knowlen, back in February of boat by making it smaller. At that time, 1977. Since designing the first Excaliber, he was heavily involved in other projects David has moved on to slightly bigger and couldn’t take the time to redesign things. He is the designer of the new the boat. He said he wouldn’t mind if I Circus Circus unlimited hydroplane and used his ideas to design a smaller ver­ its sister hull, the Squire Shop. At the sion. Using the basic design concepts time of this writing, David is serving as a provided by David, I scaled the boat design consultant for the Circus Circus down to 26-1/2 inches in length, with a unlimited racing team. David’s involve­ tunnel width of 7-1/2 inches. The new ment with full-size racing hydroplanes hull was completed just prior to the big goes back over twelve years to a time race in Reno. The 1977 NAMBA Nats was when he designed, built, and raced his its first race, and it placed first out of 48 own 280 class limited hydroplane. In entries in the outboard class. That hull The author (left) and Dennis Caines, 1st and recent years, David has restricted his went on to set an oval course record, win 2nd at Dist. 8 Points race in May '79. interest in hydroplanes to the research the District 8 Outboard High Point Excaliber II to win the 1978 District 8 and development phases of this sport. Award in 1977, and became the first High Point Award, and my Excaliber II Although he now designs full-scale stock outboard tunnel to be officially placed second to his. During the first racing boats, David was an avid model timed at over 40 mph. half of the 1979 racing season, the boat and airplane builder in his youth. As often happens when you hit upon Excaliber II belonging to Dennis Caines, When the K&B .21 Outboard first be­ something that works pretty well, others also from Olympia, was the leading boat came available in late 1976, David ex­ want to build your design. Such was the in District 8 Points. As the results show, pressed an interest in designing a boat case with the redesigned Excaliber, to the Excaliber II has been a rather suc­ for me to use with this new power which I now added " II” after the name. cessful design. source. He provided mewithasetof lines During 1978, John Havens, Jr., from The Excaliber II has been built by a in February of 1977, and the original boat Olympia, Washington, used the Excali­ number of people, both experienced was featured in a fall issue of RC Sports­ ber II design to establish a new stock and inexperienced model boaters. It man in 1977. The original Excaliber was outboard record in the NAMBAstraight- offers semi-scale appearance, and the 29-1/2 inches in length and featured a away of just over 42 mph. Although this construction isn’t too difficult. The boat tunnel width of 8-1/2 inches. I set a record has been broken by a hydroplane should be built entirely from plywood; NAMBA straightaway record of 35.95 design, I think it still stands for stock the specific sizes needed are called out mph in March of 1977 with this boat. outboard tunnel. John also used his on the plans. Use epoxy glues for all

A simple building jig for the center section is a must; this one is The center section framework attached to the building jig with made from plywood. C-clamps.

22 R/C MODEL BUILDER Center section bottom being attached to the framework. Clamps and masking tape and pins hold the plywood sheet in place. construction. I personally prefer to use Center section ready for the top pieces to be five-minute epoxies for building frame­ epoxied in place. works and slower drying epoxies for sheeting the hull and sponsons. Since the plywood will need to be cut to shape, it will be necessary to have access to either a band saw or a jig saw. A question that is often asked me is," How long will it take to build this boat?” There is obviously no way I can give anyone an answer to how long it will take them to build the Excaliber II. However, I did build the first Excaliber II, paint it with clear, and install my equip­ ment, in four days. I should also mention that those four days were spent entirely devoted to that project. . . like 12 hours Rear of the center section. a day. Well, let’s get started with the Front of the center section. construction of the Excaliber II outboard tunnel. since proper alignment of the sponsons THE BUILDING JIG depends on a squarely-built center building sequence. Time spent in doing A most important part of building this section. The interlocking pieces of the this process right will yield dividends model is the use of a building jig for center section require the building jig to during later phases of the building and assembling the center section. This jig is hold them in proper alignment while running of the boat. simply a flat building surface with the bottom is being attached. I have upright pieces attached to it where the included a photo of the very simple jig ATTACHING THE CENTER first three frames are located. The used for building the boat. Any type of SECTION BOTTOM importance of building a true center material can be used for the building jig. The 1/16-inch plywood for the bottom section cannot be overly emphasized, ASSEMBLING THE CENTER SECTION should be pre-cut prior to gluing to the The framework for the center section framework. The bottom piece should be is really quite basic, with four frames firmly clamped to the pieces at the back running crosswise, four frames running and front of the center section. Tape can lengthwise, and a nose piece. As shown be used to pull the bottom down against on the plans, the frames are notched so the outside frames. Weights or pins can they can be slipped together. The most be used to keep the bottom against the important thing to remember about the cross frames. Once the epoxy has set, framework is that it should be as true as the framework and bottom can be possible. The two lengthwise frames removed from the building jig and the forming the cowling can be inserted into bottom can be trimmed. the cross frames, and then the cross ATTACHING THE CROSS frames can be clamped to the building SECTION TOPS frame. Leveling the cross frames will Either 1/16 or 1/32-inch plywood can bring the longitudinal frames into align­ be used for sheeting the top of the ment when they are evened with the center section. A strip of stringer mater­ cross frames. This alignment process is ial is glued along the outside of the probably the most important step in the cockpit longitudinal frame where the

The center section with the top pieces glued in Sponson frameworks being glued up. Be sure to make a right and a left! place.

DECEMBER 1979 23 top pieces will butt against this frame. The top pieces can be pinned to the transom frame and clamped to the front frame. Pins and tape can be used to keep the pieces in position while the glue sets. When dry, trim the top pieces even with the outside frame. A cap piece can be cut for covering the back of the center framework. Prior to attaching the top pieces, it’s a good idea to paint clear over all the interior that will be covered by the top pieces. The top pieces can be given a thin coating of epoxy over the entire surface when they are being attached. This will help insure a water- resistant interior. BUILDING THE SPONSONS The sponson frameworks are built separately from the center section and attached to the center section. The sponsons can either be sheeted first and attached, or the framework can be attached and then sheeted. I use the The author's Excaliber II has the radio box built into the boat. Plexiglass cover serves as a base latter method, but I’ve seen others sheet for the driver and mount for the switch. Finish is K&B Superpoxy. the sponsons first. The construction of the sponsons is fairly simple. There is goes in place first, since the chine piece so the sponson side can be at­ one longitudinal frame and four cross stringer attaches to it at the bow of the tached. Masking tape and pins can be frames. A stringer is used for the bottom sponson. used to hold the part of this piece that chine and plywood is cut for the top Once the sponson framework is com­ attaches to the chine, and clamps can be sheet. Remember to build one right pleted, it is ready for sheeting or attach­ used to hold it in position along the top sponson and one left sponson! I only ing to the center section. I personally sheer. The sponson sides are trimmed to mention this because in the past. I’ve recommend attaching the sponson accept the sponson tops. Since the front glued two of the same sponsons up framework to the center section prior to of the sponsons have somewhat of a before realizing my mistake. One time I sheeting. This will prevent the frame­ compound bend for the plywood, it will even placed the crossframes in position work from twisting while the sheeting is be necessary to use lots of tape and pins upside down! The mistakes were dis­ being applied. Before sheeting the to keep this piece down on the frame­ covered very quickly, but it just goes to sponsons it will be necessary to bevel the work. The sponson bottoms should be show that even someone who has built outside edge of the chine stringer to 1/16 plywood, and the sponson sides lots of model boats can goof when not allow the bottom sponson piece to fit and top can be 1/32. The 1/32 will bend paying careful attention. Tack the longi­ flat on the framework. Pre-cut the much easier for the sponson top. Use tudinal frame to a flat building surface sponson bottom and use small clamps the same procedure for sealing the when gluing the top sheer piece and and pins to hold it in place while the sponsons as that used in sealing the epoxy sets. When dry, trim the bottom center section. chine stringer in position. The top sheer Continued on page 101

K & B Autotrim installation. A valuable device for adjusting the Stern view of the author's Excaliber II. Best performance is with a engine settings. J.G . E-20 prop.

Mike Wight's Excaliber II uses a separate waterproof radio box. Excaliber ll'sb y Mike Wight (left) and Leo Dreith. Cowling shapes Ready-made boxes are available, or you can make your own. can be easily modified for different appearance.

24 R/C MODEL BUILDER ,ι " ...... - ■ ,

FULL SIZE PLANS AVAILABLE - SEE PAGE 116 DECEMBER 1979 25 By JOHN TUCKER PHOTOS BY AUTHOR UNLESS NOTED

SCHLUTER HELICOPTER PARTY SATURDAY, SEPTEMBER 16, 1978 bers to specific duties to make the party A few days ago, I received in the mail a 7:00 a.m.: Training and practice flights an outstanding success. Items covered package from Dieter Schluter which 9:30 a.m.: Briefing on rules and tasks include the following: Announcements, contained literature and other bits of 10:00 a.m.: “ Party" begins information packets, press and maga­ information on how modelers conduct 5:00 p.m.: Flying stops zine coverage, posters, signs to flying their R/C Helicopter “ Fun-Fly” parties Evening: Get together for dinner site, printing, mailing, hotels, program, in Germany. Earlier this summer we had SUNDAY, SEPTEMBER 17, 1978 impound tent, food truck, wet-weather discussed the fierce competition which 8:45 a.m.: Impound transmitters plans, guards, fences, music, loudspeak­ is so prevalent in the usual helicopter 9:00 a.m.: Continue the “ party” er, camping, parking, equipment for contests, and the sometimes drastic 1:00 p.m.: All flying stops tasks, etc. results when each modeler "goes the 2:00 p.m.: Begin expert flight demon­ FLIGHTPROGRAM limit” as he tries to outdo his competi­ strations Now that we know how to organize tor. And this isn't limited to the U.S., 3:00 p.m.: Awarding of prizes the fun-fly, let’s examine the tasks either . . . it’s the same thing around the 5:00 p.m.: End of party themselves. The most important thing is world! To help foster the hobby, by As the applications are completed and to do your best, but don’t forget, you’re giving even the novice a good chance at returned to the party director, a start there to have fun. New pilots have a winning trophies, Dieter embarked on a number is assigned to each participant good chance to practice hovering ma­ series of fun-fly parties which we’ll try to and is printed ona “ Flightprogram.” The neuvers. Naturally, the better pilots will describe below. The primary object was Flightprogram is then mailed to the accomplish the tasks more quickly, but to eliminate the “ precision-pattern” modeler so that he can read about the the not-so-expert pilot has realistic goals aspect (which is almost always won by tasks and still have ample time to prac­ also. The helper will also influence the the experts) and establish a completely tice them before the party date arrives. performance, inasmuch as he actively different set of rules which essentially On the day of the party, each flier is also participates in the action. All tasks are set forth a “ task” to be performed as given a condensed version of the tasks performed in the same manner as you many times as possible in a given period along with other pertinent information, would expect a full-scale helicopter to of time. The grading system takes into such as parking and overnight facilities, perform them. Try to be realistic! The account only the number of completed location of restaurants (and toilets on basic idea behind the given tasks is the tasks, not the way the task is performed. field!), etc. assumption that on the top (roof) of a Admittedly, the modeler must have In the meantime, the director pre­ large house or building, there are a certain basic skills, such as the ability to pares a checklist and assigns club mem­ number of people who need rescue by hover within a fairly small area, and must also display the ability to safely control his helicopter at all times. Given these qualities, a beginner feels right at home while performing the tasks, without a lot of pressure competing against the more expert pilots. He is in a relaxed atmo­ sphere, having fun, and above all he will take home some sort of a prize (even if it is just a diploma or certificate of ac­ complishment). Once a time and place have been established for the “ party,” the paper­ work starts to fly! First, invitations are printed for distribution to the known fliers, the hobby shops, clubs, and newspaper announcements, along with model magazine notices. The invitations are usually two pages; the first page contains the date, location, and the schedule of events, while the second page is a data page requesting your name, address, telephone number, helicopter type, motor, radio type, frequency, how long you have been flying, what different types flown, how did you hear of the party, and your helper’s name. Yes, you do require a helper in these tasks, and he is not forgotten when the awards are handed out! The schedule of events contains an outline of the program, and might look something like this: FRIDAY, SEPTEMBER 15, 1978 10:00 a.m.: Helicopter seminars, dis­ cussions, etc. 2:00 p.m.: Training and practice flights

26 R/C MODEL BUILDER 10 Jahre SchlOter-Hubschrauber-Modellbau 16" CONSTRUCTION OF HOUSE

hat am 8. und 9. Oktober 1977 (Ϊ) HOUSE IS MADE FROM A LARGE In Můhlhelm am Main an der CARDBOARD BOX. ( 2) DIMENSIONS NOT CRITICAL EXCEPT HELPER MUST BE ABLE TO DO LIM ITED W ORK IN SIDE. @ ROOF MUST HAVE 16" SQUARE llelicoptcr Part y HOLE FOR HELPER ACCESS TO teilgenommen und bel diesem ROOF. BALANCE OF ROOF CAN heiteren Hubschrauber-Wettbe- BE WIRE MESH FOR VISIBILITY werb AND PROTECTION. a ls ______( 4) LEAVE ONE END OPEN FOR CRAWL-WAY. den______PLATZ belegt.

Herzllchen Dank fúr das Interes­ se und die Teilnahme an dieser Veranstaltung. may be used on one task only. In order remain in the immediate area of the j * } · Ρ ώ ί# / / l i k ! H to save time, all three maneuvers are house. In task "C ” the helper remains in performed in one flight sequence, but the vicinity of the table used in this HUBSCHRAUBER i . f // / the maneuvers are scored separately. exercise. Obviously, it is prohibited to iC//7LLÍL&f~^ MOOELLBAU Depending upon the number of partici­ fly above spectators or other modelers, DM4·! h N u t r OwW i Ik IW 5 6052 MuMMm am M im WMt Gatmani pants and the weather conditions, as and the helper must exercise great many rounds as possible may be at­ caution when hooking up the pylons! If A sample of the certificates awarded to all contestants at the Schluter Helicopter parties. tempted in rotation with the other fliers. the pilot cannot safety control his The final score is based upon the best model, the director/timer may ask him helicopter. For some reason or other, round achieved. to terminate his flight. Anyone can participate if he has a safe and mechani­ the building is surrounded by flood- STARTING waters, and boat rescue is not practical. cally sound helicopter, and flies it in a Time allowed for engine starting is 3 safe manner. To add to their problems, the building is minutes. Any time in excess of 3 minutes on fire and the helicopters must bring as is applied to the first task and thus PRIZES much water as possible to the building shortens the time fortask 1. Inany event, All participants take part in the award­ to help put out the fire (sounds kinda he cannot take more than 5 minutes for ing of prizes, provided they have earned like the borate bombers, doesn't it?). Of engine starting (he loses his turn). The at least 10% of the points in the highest course, as the building burns, there is a pilot may interrupt his round at anytime score. Since the points come from considerable amount of debris and for model adjustments, however, the different tasks (plus the bonus "joker” wreckage which must be cleared out of time continues to run. If any interrup­ points), there is no first place or other the way in order to affect a successful tion lasts in excess of 2 minutes, the order of proficiency. Prizes are awarded rescue. round is cancelled. strictly on the number of points received The tasks are scored by how many A transport container is attached to for your best round. The grand prize, the persons are rescued from the building; the helicopter by twine or string ap­ “ Schluter Gold Cup” and $165 in cash, is how much water has been transported proximately 5 feet long. It must be awarded to the modeler with the most and dumped on the fire; and how many attached to the model at a minimum of 2 points. The next three places receive pieces of debris have been removed places. The distance below the model is $100, $50 and $25. Donated merchandise from the area. Prior to beginning the up to the pilot; however, it must be of prizes are next awarded down the point tasks, the modeler may declare which of sufficient length to permit the helper to list, and all participants will be awarded a the three tasks he will perform best; this hook up people (pylons) to the contain­ certificate of achievement for their will permit him to double his points on er (in safety) and to be able to lower the efforts. that particular event! This is much like container into a basin of water. During Continued on page 78 having a “ joker” or “ wild card” which tasks "A ” and “ B” , the helper must

3 5 '------35’ ------rn· I rn------35'

DECEMBER 1979 27

Marine Squadrons VF-9M and VF-10M put their ship numbers on sides of fuselage ahead of scarlet-and-gold Marine Corps insignia. "U .S. M ARIN ES" appeared in black block letters on upper wing top surface. USMC photo via Johnny Burnett. vicing. Colors of the F4B’s were standard Navy light gray fuselage and wings, except for the chrome yellow top sur­ B0ENG*F4B-4 face of the upper wing. But markings were not always the same, particularly on Marine airplanes. The Marines re­ tained the red, white and blue rudder by PETER WESTBURG P A R T TWO stripes until camouflage was adopted in 1941, but fighters assigned to carriers • Research on the Boeing fighter un­ later F4B-4’s. Marine squadrons flew the had solid color tail surfaces, and when covered several interesting items not F4B-4, and these airplanes had leather the squadron was assigned to another hitherto evident to most of us. The covers on the aft landing gear struts to carrier, the color changed. The best bet compass was mounted on the aft face of keep them from being nicked by stones. for modelers is to stay with photos of the rear spar and on the centerline to get Apparently, the Marines operated from one airplane. it out of the magnetic field of the iron unimproved fields; the leather cover is Some Boeing fighters are still around. masses of the two guns on each side of never seen on Navy airplanes. A civil Model 100 was restored in Seattle the instrument panel. A small window in The most surprising discovery is an in late 1977 as a P-12 and it is flyable. The the top surface of the wing illuminated item not seen on any other plans or kits. Orange County Airport Museum has a the compass and the cover on the A battery box is mounted on the left restored Model 100, and the Planes of bottom ahead of the handgrip was wing fillet between the spars. The box Fame Museum at Chino, California, has transparent to enable the pilot to view it. appears in all photos of the area, on both a flyable P-12E (s/n 32-17) with a razor- A hole in the fuselage ahead of the Army and Navy Boeings, and it is surpris­ back headrest. The Air Force Museum, lower wing on each side appeared to ing that no one seems to have noticed it Dayton, Ohio, has a non-flyable P-12E have no useful function. It’s there on or thought about it. In those days, (s/n 31-559). The only true F4B-1 is some F4B-4’s and on all F4B-3's. It turned batteries were not as reliable as they are hanging from the ceiling of the National out to be a clearance hole for a dive now, and they required constant check­ Air & Space Museum, Washington, D.C. bomb cradle fitting on the lower lon­ ing and service. A hinged lid with blisters And should you care to risk the trip, you geron. Dive bombing was taken over by over the two terminals and two twist can view an excellent F4B-3, one of two-seaters, so the hole is not seen on fasteners was provided for easy ser­ several exported, in Bangkok, Thai land. ·

Rare cocarde on wing identifies this ship as one flown by Capt. F4B-4 9241, now in Smithsonian, being fitted with practice bombs. "Monk" Hunter, March Field, CA, 1932. Nick Carstens photo. Rear l.g. strut has leather cover to protect against stone nicks.

DECEMBER 1979 29 Two in-flight shots of the "Snark III," the super-fast slope pylon racer designed by Peter Edridge and Bill Drumm. It's the third in a series of slope gliders by these two talented modelers. Span is 8 feet, weight with ballast is 11 lbs., 8 lbs. empty. One of the sleekest slope racers ever. stab was given a symmetrical airfoil section. The four-pound empty weight could be doubled by ballast for even greater speed. Normal operation was *c SOARING about nine ounces per square foot. PHOTOS BY AUTHOR Snark II performed well but fell short of by Dr. LARRY FO GEL. challenging the eleven-pound planes that fly in unlimited pylon racing. • It takes two to tango. . . I mean, two to and even lighten R/C sailplanes. Snark III is designed to meet just such team up for outstanding success. Bill Once into the art and craft of re­ competition. Now the sweep is gone, as Drumm, of Novato, California, has flown design, he focused on attaining speed Peter feels it’s better to have the control R/C sailplanes since 1975 . . . ASW-15, and stability .. . the very qualities that surfaces perpendicular to the airflow. the Wik Kestrel, and various versions of put you in the winner’s circle for slope The span is now the full eight feet. The the Ridge Runner. Peter Edridge, of Mill pylon racing events. His first original chord goes from eleven inches at the Valley, California, watched him fly at Mt. design was the Snark I, a long-nosed root to seven inches at the tip. The airfoil Tamapais one day in February 79, and sleekslope soarer (trysayingthat lOtimes slims to become reflexed at the tip. was “ hooked.” Peter bought a Kestrel without stopping). The swept-wing Peter notes that too thin an airfoil hurts and proceeded to learn that flying is not configuration reduced the eight-foot- high-speed cornering. Layers of fiber­ as easy as it looks. He thought, “ Why not long wings to a 7.6-foot span. The 9 glass give the wing tremendousstrength. make the model indestructible for any percent thick airfoil was patterned after beginner?” . . . not the first time we’ve that of the Ridge Runner. He made the At full speed the now fixed stab provides seen that tried. But this was a natural for wings from 2.1-pound blue foam, a sturdy base for the elevators. The Peter. You see. he came to America from covered with 1/64plywood and lacquer- fuselage is now four feet long with a England in 1972 and found it impossible based paint. The fiberglass fuselage was long, narrow nose. Control surface to pursue his chosen career in the 38 inches long. The full flying stab was actuation is simple and clever ... a States (research in artificial intelligence made of sheet balsa. This very short- minimum bend Nyrod with clevis and pyscholinguistics). Instead he found coupled bird weighed in at about four hooked to a drilled wing skid. The employment in racing car design and pounds. In flight it was fast but some­ weight is placed farther from the CG, fabrication. Surely the same fiberglass what squirrelly. thus providing greater longitudinal technology could be used to strengthen stability. The empty weight is eight Longer fuselage (42 inches), less pounds. Three pounds of ballast make sweep, and greater tail volume made this plane fully competitive. Seeing it fly Snark II more stable. The airfoil was 11% is an experience you won’t forget. thick at the root and 8.2% at the tips. The chord went from 10 inches at the root to Remember, I said this is a team effort. 6 inches at the tips. The ailerons were Each man does what he does best. Peter moved outboard. Epoxy was used to designs and builds the birds, while Bill is hold the plywood to the foam to prevent any separation from the previously used adhesive transfer tape. The full flying

Peter Edridge with his Snark III. He does the Snark III requires a good run and strong heave A nylon wing tip skid, drilled for a clevis, designing and building, Bill does the flying. to get going, as Peter demonstrates. serves as the elevator horn. Neat idea!

30 R/C MODEL BUILDER Peter and Bill with Snark III at Thornton Beach. Photo gives a good Snark I, first in the Snark series. Fast but not all too stable. Note the idea of the plane's very low frontal area. full-flying stab, very short tail moment. the pilot. They invited me to watch an Hemet, CA 92343), plans to offer carbon "airshow” at Thornton Beach State Park fiber laminate spars for those who want (on the coast between Pacifica and San to make their ships "indestructible.” Francisco). We were to meet at 3 p.m. The outer black material is about .050 On the east side of the peninsula the inch thick. It is attached to the toughest weather was warm and sunny. I found foam I’ve ever seen. The 1/2-inch wide myself wishing for a coastal breeze so spars will come in 3/16 and 1/4-inch that I could see the new design fly. thicknesses. The 3/8-inch wide spars will Taking Skyline Drive into thecloud bank come in 1/8 and 1/16-inch thickness. I entered another world . .. the air was Sure, they’ll cost more than spruce, but cold and windy. At Thornton the wind think of the investment you’re pro­ was a steady 20 knots and too cold for a tecting. business suit, so I borrowed Peter’s They’re also having adventures in jacket. He launched the bird from about England. Keith Thomas of Frome, 150 feet above the white-capped surf. Somerset writes: Bill was in complete control and in a few “ Here are some photos taken at our seconds Snark III had gained more recent White Sheet Club scale glider airspeed than I like to handle. He’d dive competition. There are pictures of Brian and silently slip by at what must have Hendy’s Slingsby, which won the event. been eighty miles per hour. . . yes, I said He is a fine craftsman with a relaxed and silently. Usually you hear a swish as the relaxing manner . . . a real pleasure in sailplane flies by with any significant any competition where ‘nerves’ are all speed . . . testimony to the turbulence it too frequent. Usually. Brian flies alone creates. But Snark III was silent. and is quite happy to launch his large, Bill then demonstrated an inverted heavy model single-handed. Once un­ pass, tight turns, a loop, and even a slow der way, he nonchalantly strolls over to roll. I couldn’t resist the temptation the judges and provides a light-hearted From England, this photo of the White Sheet commentary on the flight in his own R .F.C .'s mobile windsock. They stop flying when he offered to let me fly the Snark. when he falls over. Keith Thomas in back. but I maintained significant altitude and lilting Welsh accent. Heys a character. avoided any high speed maneuvering. It " The DFS Reiher is a most interesting currently available 1/4scales. It lacksthe was still a thrill. OK, the challenge is out model, representing a great deal of ability to handle strong winds. Its taking to all those interested in R/C sailplane work. At 1:6 scale, the model suffers in fourth place is quite an achievement. pylon racing. Can anyone beat Snark III? ‘wow’ impact next to the more prevalent "Ken Henridge is shown with his 1:8 By the way, Bill Mueller, of Hi-Flight 1:4 models. That’s a great pity. It’s really Slingsby T-53. his first scale model. With Model Products (43225 Whittier Ave., worth a lot more than the ready-built a 25 mph wind the T-53 was doing 200

A seldom-seen D FS Reiher, nicely built by Pete Bradshaw. The 1/6- In the 25 mph wind, Ken Henridge's 1/8-scale Slingsby T-53B had scale ship took 4th at recent glider meet in England. to fly at 200 scale mph just to stay in one placet

DECEMBER 1979 31 Brian Hendy single-handedly launches his 1 /4-scale Slingsby Tandem Brian's Slingsby penetrates out over the valley. Sure looks realistic. Tutor...no mean feat in 25 mph wind. The model won 1st at recent White Sheet scale glider meet. mph scale speed just pointing into the "The fuselage was planked over form­ and as the controls all work pretty well, wind! On a calm day, though, Ken ers (later removed) and finished inside the model is almost boringly simple to would still be flying when all the heavy­ and out with 1-ounce glass cloth. It takes fly. The ailerons are immediately effec­ weights were grounded. As our canine one sentence to say all that, but it took tive, and careful use of rudder (often windsock shows, it was not Ken’s day! me weeks to build it!! The wings are opposite rudder) is needed to keep "The other photos show my CE-75 orthodox, with lots of ribs, tapered things smooth. It is a great pleasure just ‘Silene,’ which I promised to report on wood spars top and bottom, webbed to wheel round in circles trying to keep in greater detail. The model is 1:5 scale, both sides, the whole lot 1/16 balsa the angle of bank constant. . . tricky, but spans 3.6 meters (about 12 feet), and sheeted. Internal horns,spoilers, etc. are a pretty sight. Stalls are straight ahead, weighs 7-1/2 pounds, giving a wing expected in our contests, and the Silene nothing vicious; in fact the model is very loading of 14-1/2 ounces per square is no exception. These little details can docile. I recently met the designer, foot. Ailerons, elevator, rudder, spoil­ be time-consuming. The tail halves just Bruno Boulvois, who was over in Eng­ ers, and retract wheel are fitted, and an slide onto wire dowels, the elevators land with the Silene for certification tests aero-tow release will be added when I being actuated by a wire bent at 90° (imports are due to start soon), and we have the time. Two servos are fitted in which protrudes from the fin. I was very had a great time comparing the model each wing, making the linkages very pleased with this system, as nothing with ‘grand frere' (big brother). All those straightforward. The drawback is the shows at all from the outside. You little details I got wrong! Maybe next number of servos required; seven now probably guessed.. . as soon as I sheeted tim e.. . . Kind regards to you and yours, and one to come. Also required: two the fin, the whole shooting match Keith Thomas." Y-leads and two servo extensions. The jammed solid! Curses! At times like this, Next month . . . a kit review of a new canopy hinges up, and the whole of the patience can be handy. Super Slope Soarer. See you then. · cockpit fittings lift out to reveal sundry "The Silene flies superbly. The weight servos, retract mechanism, etc. and size bring a solid feeling of stability.

Keith Thomas sent these photos of his superb CE-75 "Silene" 1/5-scale sailplane which he has been flying a little over a year. He estimates that he has about 300 hours invested in this beauty. It's equipped with ailerons, elevator, rudder, spoilers, and retractable wheel. Full cockpit details.

32 R/C MODEL BUILDER A G LIB G LO S S A R Y O F ...... GLIDER GIBBERISH as By DAVE THORNBURG . . . A sort of mini-dictionary of words and jargon that can be puzzling to aspiring sailplaners. Want to know the real difference between a glider and a sailplane? Dave's article tells all.

• Recently I’ve been hearing strange models, almost never on the wings of certain predetermined positive angle of voices in the night. Not the kind they put thermal soarers. But it’s great for em­ attack. Of course, the fuselage can’t Uncle Gridley away for, but the kind that pennages. A semi-symmetrical airfoil is hold the wing at this angle of attack; it’s come trickling in by telephone, usually an attempt to compromise between the up to the stabilizer to do that (see right in the middle of dinner. Always high lift of the flat bottom and the low DECALAGE). But if the designer has these voices begin on an upbeat, and drag of the symmetrical. Something of done his homework, he has “ hung” the always they end in a question: “ I enjoyed this same effect can be had by adding fuselage on the wing at the angle of your column on wombats .. . but what Phillips' entry (q.v.) to a flat bottom attack that will provide minimum fuse­ does decalage mean?” or, “ You're airfoil. lage drag at the speed range in which he absolutely rignt about tip stability, but ANGLE OF ATTACK: expects the model to be operated. The what is washout?” The angle at which a wing or stabilizer Aquila, for example, has a lot of positive If these seem like common, everyday “attacks” the oncoming air. For the angle of attack molded into the wing words to you, try looking them up in the wing, this is usually a positive (nose-up) roots. This makes its fuselage very dictionary . . . you’ll find that glider folk angle, as shown in the drawing. At a streamlined at thermaling speeds, but speak a language that Mr. Webster given airspeed, a wing’s lift will be more very nose-down-and-draggy at extreme­ never heard of! So I spent a few nights or less proportional to its angle of attack: ly high speeds, when the wing is oper­ skimming the recent glider articles in high angle of attack, high lift; low or ating much closer to the zero lift angle. the model press with an eye for our negative angle of attack, low or negative ASPECT RATIO: jargon, those words and phrases that lift. Take a close look at the wing roots The ratio of the chord to the span, a folks new to the sport are most likely to on any of the popular glass or plastic simple number that tells you at a glance find puzzling. Then I sat down and glider fuselages (Aquila, ASW-17,Cumu­ how long and skinny a wing is. A 100- defined them, taking care to work in as lus, Windrifter, SD-100). The wing roots many of my own prejudices and crank are molded into the fuselage side at a Continued on page 94 opinions as possible. Finally, I pared this list down to a size that would just fit in two consecutive issues of R/C Model Builder. Here's the first half; you might want to keep it around to loan out to an occasional beginner . . . if you’re lucky enough to find one who can read. AIRFOIL: The cross-section of a plane’s wing, determined by the shape of its ribs (see drawing). The simplest airfoil is the Hat plate; it has no curve top or bottom, and generates lift very poorly. Because it’s so easy to build, the flat plate is often used for rudder and stabilizer airfoils, even by designers who know better. Nobody is currently dumb enough to use it for wings, but judging by the number of non-glider folk who are beginning to kit gliders, it’s just a matter of time. The commonest wing airfoil is the flat bottom. For 90% of American soaring, it fills the bill perfectly. It has a rounded nose (leading edge) and comes to a point at the rear (trailing edge). Its top surface is humped, like a turtle’s back­ bone. People who care passionately about airfoils will argue for hours about where the peak, or high point, of this hump should be: at 30% chord? At 40%? At 42%? Don’t get involved in these arguments, especially if they happen on the field. Take the frequency clip and go fly. An undercambered airfoil has a slight­ ly concave bottom. This generates more lift at a given airspeed, but also more drag, which reduces a plane’s pene­ tration. A symmetrical airfoil has exactly the same curve on the bottom side as it does on the top. It has very low drag, but very low lift, as well. It is used mostly on aerobatic slope soarers and power

DECEMBER 1979 33 DUCTED FANS By BOB KRESS . . . Part 2 of 3 in the author's series on ducted fans. This month's article deals with running the Cox .049, inlets for pod-mounted fans, fuselage inlets, and how atmospheric changes affect fan thrust. ROTOR/SPINNER WOBBLE shaft is rotated. You can tell if you The new Glow Bee heads reportedly Just in case you think you have the haven’t corrected the problem by vibra­ will yield substantial power increases, RPM-eating engine vibration problem tion and visible rotor wobble in opera­ particularly if high nitro content fuel is solved, the TD .049/.051 engines have tion. The tip of the spinner is blurred if used. the gold-colored aluminum prop hub wobble is present. Removal of the inlet screen on the TD splined to the shaft in a usually slightly will add about 250 rpm in the AXIFLO. misaligned manner. While this does not GENERAL Due to the protected location of the bother a prop much, since it only causes The usual Cox instructions on working inlet within the fan, it is felt that the the tips to run out of plane, it drives the down to one TD head washer should be additional risk of dirt ingestion will be RK-049 rotor/spinner crazy, since the scrupulously followed. Also, piston minimized. center of gravity of the combination is seating should be checked occasionally Use of high nitro percentages in the well forward of the hub. A wobble for slop and the ball socket reseated with TD .049/.051 engines doubtless yields condition is thus set up. Fortunately, the a Davis Diesel Development tool, if power bonuses. I have no experience in cure is fairly simple. necessary. Likewise, Davis can supply this area, since I have been getting good Attach the rotor tightly to the engine engine devarnishing brushes and pro­ performance on 25% nitro, with which on a trial basis. Set up a means for cedures, if that is necessary. The devarn­ these engines are happy. I would cau­ holding the engine firmly in an upright ishing procedure is really very simple. tion that high nitro is reputed to bang position on a bench. Locate the center Such things as a loose head or air leaks in heck out of the engine, so don’t move of the spinner hole with a wire firmly the needle valve assembly can cause big out in that area without good advice. By fixed to the engine in some way. Now losses in engine performance. The latter the way, the RK-049 AXIFLO rotor can rotate the rotor (with cylinder head can be cured by a piece of tight-fitting take any nitro you give it, having been removed to make it easy) and watch for plastic tubing placed over the needle whirl tested to 30,000 rpm. There is no wobble in the spinner hole. If there is valve threads. Also, make sure your fuel way a TD will drive the rotor past 23,000 wobble, note the direction the hub is filtered, before it gets to the needle rpm, due to its blade design. valve. would have to be tilted to correct the POD-TYPE INLETS AND wobble. Now remove the rotor without FAN INSTALLATIONS rotating the prop shaft and place a All of my RK-049 rotor tests were run 1/8x3/8-inch shim of aluminum foil on using the 1/2A Heinkel 162 jet pod the hub in a location such as to produce the desired tilt. Replace and fully tighten the rotor and recheck the wobble. Repeat the process until there is no visible wobble of the rotor as the engine

FIG . 8. The RK-049 fan with no inlet.

FIG . 6. An RK-049 fan fitted with a bell- mouth inlet from a Midwest Heinkel 162.

FIG . 9. Thrust test with the hatch both on FIG. 10. A flush top inlet. Doesn't look too and off yielded surprising results. good but really boosts the thrust.

TABLE MA POD-TYPE RK-049 AXIFLO Fan Inlet Tests Inlet Throat Area Throat Area As Thrust As Sq.In. % of Fan Swept %of Bellmouth Area Thrust Bellmouth 7.07 100 100 Original 1/2A He 162 Inlet 4.22 59 92 Same, Expanded Throat 5.43 77 90 Production 1/2A He 162 Inlet 6.15 87 100 No Inlet 7.07 100 74

34 R/C MODEL BUILDER TABLE MB fan inlet tests have been run by the POD-TYPE .40 AND LARGER CLASS FAN INLET TESTS author on .40 class fans, with results Fan Inlet Throat Area Throat Area As Thrust As shown in Table IIB. Sq. In. % of Fan Swept %ofBellmouth FUSELAGE INLETS Area Thrust Turning now to fuselage type inlets, RK-40 Bellmouth 16.4 100 100 the only really accurate tests run by the RK-40 Production author on installed inlet performance He 162 14.2 86 100 were conducted on the Midwest A4D, RK-40 No Inlet 16.4 100 65 designed by Nick Ziroli for the RK-049 RK-20 No Inlet 10.8 100 83 AXIFLO. Early flight tests of the proto­ Grumman 8-in. Bellmouth 39.48 100 100 type model showed good performance, 8-in. No Inlet 39.48 100 92 but the forward-facing inlets were 8-in. Design 698 somewhat reduced in size for the pro­ VTOL, Long duction version, in the interest of scale. Spinner 12.83 32.5 90 Poor takeoff and climb performance of 8-in. Same; short the first production A4D's still persisted spinner 16.07 40.7 94 after the foregoing rotor design defi­ 8-in. Same; Williams ciencies were corrected. The author Spinner 17.09 43.3 96 thus decided to place an A4D fuselage in Scozzi Sharp the thrust stand with the wings chopped Production off. The inlet system was that shown in Inlet 14.89 100 55 Fig. 1. This turned out to be a smart move. With the fan turning at 21,500 rpm, only in a full-scale turbofan!). previously shown in Fig. 3. Some tests of 11 oz. of static thrust was measured. different inlets were also run with a During the 1/2A Heinkel 162 inlet test Reference to Fig. 2 shows that approxi­ common rotor. The results are particu­ program, several basic inlets were tested, mately 15 oz. of thrust should be ex­ larly interesting. with the results shown in Table 11 A. All pected. Hence, losses of 4 oz., or 25% of As I have stated before, good jet data were run with essentially a “zero- the thrust were occurring. The next test model performance requires light model contraction” tailpipe (exit diameter run was that of Fig. 9, where thrust was weight, efficient engine/fan combina­ equal to the equivalent of the fan swept measured, hatch off. The surprising tions, and most importantly, a good inlet diameter, or .906 times the fan tip result was that thrust only increased to system. diameter for the RK-series fans). 11-1/2 oz. at the same 21,500 rpm figure. The basics of good rounded inlet lips, With the fan inlet apparently wide open, good internal contours, and auxiliary The bellmouth inlet was previously a big thrust loss was still occurring! I then inlet design have been covered in my shown in Fig. 3. The production inlet is theorized that the fan inlet, while wide prior articles. But I have never attempted that being produced by KTI for the 1/2A to qualify just how good or how bad Midwest Ffeinkel 162. A photo of this open, still had sharp lips, so the idea of closing the hatch and adding more well- things can get for particular cases. Thus inlet is shown in Fig. 6, and the cross- refined inlet area in the form of a flush begins my inlet test story, initially section is shown in Fig. 7. The no-inlet confined to the simple and ideal pod­ test article is shown in Fig. 8. The data of top inlet emerged. This inlet is shown in Fig. 10, rather awful looking, but as type inlet case. For openers, remember Table IIA, as well as those of Table IIB to that the model ducted fan, which runs at follow, will be discussed in conjunction results showed, very effective. With the a fan pressureratioof 1.02or less,cannot with the fuselage inlet data of the next top inlet installed, thrust jumped to stand any significant inlet losses (which section. 14-1/2 oz. at the same 21,500 rpm. normally would not even cause a sneeze Other enlightening pod-type ducted Continued on page 72

THROAT A R E A -X OF FAN WTEFT AREA FIG . 12. (top): Multiple inlets worked as well as top inlet in FIG . 10. FIG . 13. (above): Easier to make, single inlet is as good as F IG . 12.

DECEMBER 1979 35 hot head” had to be holding the cylin­ der round right up there at TDC where all the blasting was going on. This got us to checking the diameter of the portion that fit down into the cylinder. We immediately discovered that the factory heads were not really round, but had high spots. P.O .B o x 817 17119 S. Harvard The solution to this problem was to Edinburg, TX 78539 JOE KLAUSE Gardena, CA 90247 turn down the diameter of the insert P.O. Box 2699 portion about .200, press on a band, and Laguna Hills, CA 92653 remachine to the correct dimension. What eventually evolved was that the Send in your questions, relative to glow or ignition engines, and these band was machined .002 undersize, experts will give you the correct answers. heated over a gas flame for one minute, and then popped onto the cut-down ALDRICH blissfully perfect until the engine fires! head that had been frozen. With this shrink fit, the band stayed put and it was • We've been doing this column for And where does it fire? Why, at top dead virtually impossible to see that any new about a year and a half now, and over center (TDC), that’s where. Just think what happens to our nice straight cylin­ metal had been added. Then a few years this period have continually stated that der when that explosion goes off up later, when we were making our living we no longer do any engine rework. Yet hardly a week goes by that we don't get there at the top. Something eventually full-time in the engine rework business, the NMPRA made a rule change that dis­ inquiries as to what we charge to rework has to give, and what usually happens is the cylinder gets bigger up there at the allowed any added metal. some engine. top where the blasting is going on. In the hopes of squelching this and We found a way to get around this rule perhaps getting more readers, we are Most pistons have a wrist pin (not like by simply putting the head on an anvil going to start a series covering some of the little 1/2A monsters with their ball and pounding the insert portion down the “ tricks' we developed over the years socket/rod hook-up) that passes with a hammer until it spread out to get more performance out of an through the piston via at least one hole. enough that the head could be re­ engine. If any of you out there have Under load (running conditions), the machined to fit the cylinder properly. something in particular that you would wrist pin applies pressure to the piston We then re-cut the cylinder chamber to like covered, drop us a line and we’ll do which can make it grow to the wrist pin the correct shape and faced off the our best to do something on it. sides. In other words, the piston begins opposite side of the head so that the Let me state at the beginning that 80% to take on an oval shape . . . all of a head now took a short reach plug where it required a long reach before. Now you to 100% of what makes a great engine is sudden our piston isn’t so round any­ the fit of the parts. “ Tricks” can help in more. This condition is not very pro­ know how the "double bubble” head going faster, but all the “ tricks" in the nounced in so-called stunt and sport evolved and why the use of short reach plugs increased so much. bag won’t make up for badly fit parts. If engines, but as the power, rpm, and thus you fly C/L Stunt, R/C Pattern, Scale, heat, go up, this distortion can become Next month we’ll carry on from here etc., the best advice we can offer is to more acute. and get into how to stop, or at least limit, cylinder and piston distortion. · select a quality engine, break it in This sounds like everything has gone carefully, and leave the damn thing to hell in a hurry. And, in fact it is a good KLAUSE alone! description of what causes a big power Regardless, there are a bunch out loss in an engine that has been pushed POWER LOSSES there who want to make their engines past its design limit. Have you ever heard or even made run better or faster or something. In the Whether it be an extended over-lean comments similar to these? "This morn­ following months we'll try to cover run (cook job), a sport engine hopped ing my engine ran great; this afternoon things that work, as well as those that up too much or run on too much nitro, it's a real dog.. . " Or, "For the first don’t . . . in a sense, some guidelines of or any one of dozens of things, the couple of months it was fine, but recent­ do’s and some don’ts as pertains to our foregoing is basically what kills power. ly it's lost a lot of power. . . " Or, "It was a model engines. It is easy to see that when a cylinder super engine for years, but this year it's All other things being equal, the heart becomes bell-mouthed, compression sick.” Whenever I hearsuch a comment, of an engine (and about 90% of whether will suffer, and thus power is lost. it’s usually followed by, "What’s wrong?" it is a really good one) is in the fit of the Likewise, if a piston gets very out of Unfortunately, there is nosimple answer. cylinder and piston. There is no sub­ round, the cylinder can tend to follow, However, a review of most of the com­ stitute for a round piston (or piston and and the least that can happen is a loss of mon causes should help you to diagnose ring) running in a round cylinder. compression. what’s wrong. Theoretically, we could also add the We fought all of these problem condi­ To begin, let’s assume you are ab­ word "straight” in between the words tions in various combinations when we solutely certain that there has been a “ round” and "cylinder.” Unfortunately, got back into C/L Speed in the mid specific power loss . . . not just a gut things don’t always go as planned, and a 1960’s. Our pocketbook still pinches us feeling. For the average modeler, the straight cylinder does not always stay on the fanny everytime we think of all most practical way to know this is straight, nor a round one stay round. the money that went into engine parts. through the systematic use of a tachom­ One of the worst power parasites is a The first "trick” we picked up on was eter. If you don't have one, I strongly bell-mouthed cylinder, that is, one that that some cylinder heads ran faster than recommend that you get one. There are is larger at the top than at the exhaust. other supposedly identical heads. In many brands available, and each has its Most cylinders are relieved below the checking the portion of the head that good and sometimes bad points. My exhaust enough to avoid the piston went down into the cylinder, we found personal preference is the Royal Pro dragging through the bottom of the that the ones that ran the fastest were Tach. It reads up to 25,000 rpm in stroke, but not so much that excessive larger in diameter. What we came up selectable 5000 rpm increments. It works slap will occur. Therefore, what we are with was that the aluminum bar stock well in dim light, and best of all, it has a generally concerned with is the cylinder head expanded more when hot than the large meter that enables you to easily walls from slightly below the top of the steel cylinder. This meant that the best read a 100 rpm change. They’re available piston at bottom dead center (BDC) to head was one that, when hot, actually in kit form ($64.95) or completely as­ the very top of the cylinder. became a tight fit in the cylinder. Now, sembled ($94.95). Write to Royal Elec­ With everything round and straight why did this make the engine run faster? tronics Inc., 3535 S. Irving, Englewood, (the ideal situation), all things are We decided it had to be that the "tight Continued on page 90

36 R/C MODEL BUILDER Neat California Champ flown at the Nats by Bill Baker, assisted by Dave Sweeney lights the fuse on a friend's Playboy. Crosswinds Jim Rummery. Scene is Mead Missile Base, Nats F/F site. caused takeoff problems on the narrow runway at Mead. Omahawk Field, the location was switched to the club’s former site at the Omaha National Park. This turned out to be the best move; flights could be seen for much greater distances, as the field was located on a knoll above the sur­ p m s p m t rounding vegetation and lakes. PHOTOS BY AUTHOR Of course, the winning places were By JOHN POND dominated by the Omaha modelers, but the Smith Boys (as Ed and Paul like to call themselves) from Gainesville, Florida, O.T. EVENTS AT THE NATS display Old Timer models, serve as an took several high places. Particular Hard on the heels of the SAM Champs information center, and overall, provide delight is expressed by this writer as his (held during July 24-26, at Salt Lake City), for a meeting place for the fliers to swap long time buddy. Bill Bowen, recently the Old Timer events at the AMA Na­ tall tales. You could always count on the converted from free flight, won the tionals were staged during the following engine collectors to start a first-class Class A-B event by a convincing margin. week, August 1 to 3. This seemingly swap session. Most heartwarming sight was Ron unusual arrangement is the normal way The past three years has seen a dete­ Ross flying his model from a wheelchair the SAM Champs are scheduled; i.e., rioration in the Old Timer display booth. (shades of Cliff Silva!). As pointed out one week in advance of the Nationals. Riverside AFB provided such a terrible many times by this columnist, Old Under this system, a modeler has location (winds of 15 to 30 mph through Timers are the easiest way to learn radio three days to drive to the SAM Champs, the hangar space), the booth was demol­ control. When the model goes haywire, spend three days in competition, and ished again and again by the elements. take your hands off the controls and the have two to three days to get to the Lake Charles found no Old Timer booth, model is generally stable enough to Nationals. By saving money on gas and as did the Lincoln Air Park Nats this year. right itself. travel, many fellows are able to take in However, despite the lack of public­ No meet would be complete unless both activities. In addition, this only ity, the decentralized location of all someone launched with their receiver takes up two weeks of highly prized events (R/C 58 miles and F/F 42 miles switch off. The writer, in this case, was no vacation time! from the Air Park), and the general exception, as his Dallaire Sportster made At one time before the SAM Champs paucity of information on O.T. action, three complete loops before returning became large and popular, many mod­ the fun still went on. to kit form. This did not go unnoticed by elers did not attend the SAM Champs, as WEDNESDAY, AUGUST 1 Ron Hess, of the Omaha Hawks club, they preferred to fly events all week at Thanks to Olie Olson, the spark plug and at the Victory Dinner the columnist the Nationals. Friday gave them the of the Omaha Hawks, an excellent field was presented with the unwanted Switch chance to enjoy Old Timer free flight was provided for the R/C O.T. events, Award, much to the amusement of the models. Generally speaking, the writer held on about the best day of the assemblage. Ron explained how the would set up an Old Timer booth to Nationals week. Scheduled for the new switch worked and how this award was

Chuck Trdvik's hot R/C Buzzard Bombshell had a K&B 5.8 with Omaha Hawks clubsman Mit Grimes readies his R/C Flying Quaker exhaust pipe running through cabin and exiting on side. for a flight. Ron Hess holds. Site is Omaha National Park.

DECEMBER 1979 37 Doc Mathews really enjoyed himself with his R/C Buccaneer. Sniff, sniff...something smells funny! Must be the S .T. .35 diesel Powered by an S.T. .35 diesel, shown at right. that Doc Mathews was running. From Davis Diesel Development. model flew extremely realistically, and although it did not win, the flier had the best time of all! One of the better flights of the day was made by Ron Hess’ MK II Comet Clipper . . . unofficial, what else? As Ron pointed out, he was using his model to point out the thermals so other contestants could "piggyback" them. How about that? After several Nationals, Jim Root’s Cavalier, converted to R/C, finally came into its own with some fine flying times. The beautiful streamlined outline of the Cavalier made a picture background against the big cumulus clouds. This is what O.T. flying is all about; the enjoy­ ment of a beautiful model under picture- perfect sky conditions! Taking part in the general fun was Dee B. Mathews, O .T. writer for M odel Gene Lapansie sizes up his Westerner A prior Aviation, who showed up with a well- to an official flight. He won Class A , but with a different airplane. done Buccaneer powered with a Super Tigre .35 converted to diesel. Although Lovely Becky Whitney of Salt Lake City was utilized, in that it allowed you to prac­ ineligible to enter (SAM rules prohibit Miss SAM Champs 1979. Now don't you wish tice turning the switch on and off! diesel engines after 1950), the Super you hadn't stayed home? Luckiest guy on the field was Chuck Tigre ran smoothly and quite reliably. Trdvik, when his Bombshell went out of “ Doc” sez this is a product of the Davis (4:00 p.m. had been announced) to the control because the transmitter antenna Diesel Development Co., which spe­ contest, but as all the fellows had flown, wires inside the case came loose. At the cializes in converting standard glow the flying just naturally ceased and most last instant he was able to rescue the engines to diesel operation. went home fully satisfied with a day’s model from a death dive and land it If you are one of the fellows having a flying. quickly. This was strictly due to the good noise problem on your field or with your THURSDAY, AUGUST 2 range of the set with its antenna in a neighbors, the diesel engine (with a Tried for the second time at the disconnected state. Olie Olson fixed muffler) is about the neatest sounding, Nationals, the idea of Old Timer control those antenna leads in a hurry for quietest motor you would ever want. line flying was tried again. Although the Chuck! About the only quieter thing in motors is contestants were enthusiastic about the Best flying model on the field from the electric power; hence, the diesel does events, the turnout again was compar­ writer's viewpoint was Wally Miller’s offer certain advantages. ably poor to other phases of O.T. flying. “ Old Reliable,’’ a design by Marcy that An interesting facet of the contest If staged again next year, all control line appeared in the 1938 Zaic Yearbook. The developed, as there was no definite end editors and columnists will be contacted

Tony Italiano tried like crazy to get his 3rd flight in, barely made it. Rod Ross and wife in his go-kart, Mit Grimes on right. We love to Thermal Thumber with Ohlsson .23 placed 3rd. see people like Rod participate in O .T. R/C events!

38 R/C MODEL BUILDER What a MECA Collectogether is all about...fun! Karl Spielmaker, Mark Fechner quizzes Irwin Ohlsson about the ancestry of a part· Earl Moorehead, Clarence Bull, and Tim Dannels. icular O&R .60 model. John Pond (left) and Russ Stokes look on. for publicity. This could be a real attrac­ small loading aprons. Besides the tall longer if caution had not been exer­ tive feature at the Nats!! grass, the field was liberally sprinkled cised at the start of the meet. The most enthusiastic C/L contestant with trees of all sorts. Most of the The crux of Old Timer flying is the on the field was Doug Dahlke, who modern type free flight was limited to R.O.G. takeoff, and this did pose a single-handedly put himself from first to two-minute flights, as the wind would problem with only the narrow roads third by the dint of a lot of unselfish help take the models very quickly to the available for a takeoff surface. Naturally, to the other modelers. Doug needs no surrounding corn. most of the day found the runway cross­ proof to show he is truly interested in In view of the foregoing (the writer wise or quartering to the wind. How­ O.T. Stunt flying! had visited the site three days early), the ever, some of the more ingenious souls, Credit for a good judging job of the C.D. had the foresight to order good knowing which way their model circled stunt pattern should be given to Jim weather from Jupiter Pluvius who did under power, would launch crosswise to Root and Carl Hatrak. One thing for respond with an excellent day for flying. the wind and as the model turned it sure, if the judging was poor, it was All flying that day was for three-minute would rise into the wind, successfully uniformly poor! After all, isn't this the maxes, and could have probably been clearing the tall grass. The grass, inci­ name of the game . . . fun! dentally, did get to normally mild- FRIDAY, AUGUST 3 minded Gene Lapansie.whowas noticed This is the day everyone was waiting to comment on the takeoff area rather for . . . the day that eight free flight acidly. Being a religious man. this really events would be held on one day. If you indicated the problem in no uncertain don’t think this made C.D. Pond and terms. Recorder Carl Hatrak hustle, then you However, you can't keep a good free have another thing coming! Also, be­ flighter down, and it wasn’t long before fore getting into things, a vote of thanks maxes started to be recorded. This was to timers Bill Bowen, Jim Root, and particularly evident with George Perry­ especially Harrison Knapp, who came all man in the two rubber events. He never the way from San Francisco. did have a flight under a max in over This year, the Nationals featured a eight flights. Perryman is unbeatable! truly decentralized Nationals, with the In rubber, two rather convincing free flight site a mere 42 miles from crackups occurred almost in identical Lincoln Air Park. A few more miles and fashion. Marvin Bashaw launched his we might have been clear out of the tractor at a steep angle just about the state of Nebraska! time a breeze picked up. The model From a Californian's standpoint, the with its fully wound motor hurtled over field, Mead Missile Base, wasn’t that his head and straight into the ground. great, being crisscrossed by small paved Wally Miller thoroughly enjoyed flying his Instant kit! Tim Banaszak did it even roads leading to concrete bunkers and "Ole Reliable" all through the day. A fine flier. more spectacularly with a twin pusher;

No C.D. could ask for a more faithful crew. In back: Jim Root and Ed Rangus makes adjustments to his Anderson Pylon. Daughter Bill Bowen, timers; front, Jim Root Jr. and Carl Hatrak, Recorders. Sue (center) checks engine run. Carl Hatrak photo.

DECEMBER 1979 39 Jim Root threatens the Anderson in John Pond's Super Zilch if it doesn't run well. John placed 1st in C/L Ignition despite stiff Paul Smith releases his dad Ed's R/C Gladiator for an official in competition...see results. Class C. Both are from Gainesville. Florida. the motor sticks were flying all over the Guess the C.D. didn’t publicize it well place upon impact! enough, but believe it or not,therewere Why are we talking so much about absolutely no takers for the Beauty rubber? Because, for a change, the event! Anyone who had registered an rubber entries outnumbered those in official flight (40 seconds or over) could the gas events! have qualified. That’s all right, fellows, I In that same line, the Junior-Senior got pride, too. I know when I have a Rubber event annually sponsored by good looking model and when I don’t George Perryman enjoyed a fair turnout . . . haw-w! of young fellows this time. Probably the Towards the end of the day, Tony most heartwarming sight was to see Italiano discovered that all he needed young Joe Ulibarri pick up his very first was one more flight to place in Class B. trophy at the Victory Banquet. He had to One thing about Tony, he is one deter­ wait so long for his name to be called! mined fellow. Despitestickinghisthumb in the prop (gore all over!) and running The most realistic flier on the field (although no great shakes as a competi­ into the grass innumerable times, he tor) was a Miss America which was finally did crosswind launch theThermal Thumber properly and got off like a shot continually trying to give all bystanders a haircut. With that slow rate of climb, it from a cannon. was real fun to watch the model and the Like every other contest, .020 Replica antics of the people trying to avoid the was the most popular gas event. These simple glow-powered models draw like Bert Pond is justly proud of his compressed model. Everyone was having fun over air model with beer can tank. Budweiser, there! Continued on page 110 Lite, Falstaff, Schlitz. one unknown.

from us!) use those hooks, especially if you build The Miss Tiny was an excellent contest the model as a free flight, because ship in its day and could still be compe­ sooner or later the model is going to hit titive in modern O.T. events. Its first big something that will skew the wing, and win was in March of '39, when it won 1st, when it happens those hooks will really OLD TIM ER Model of the Month 2nd, and 3rd in a big meet in Pomona, tear up the cabin. We suggest using the Designed by: Barney Snyder California. For a while it was pretty much conventional dowel method instead; it's the airplane to beat, according to the safer and a lot a easier to do, too. Drawn by: John Muir Modelcraft ads . . . that is, until the The Miss Tiny would make a great Text by: Phil Bernhardt Modelcraft Spook came along. Then little R/C model if sensibly powered; the Miss Tiny was touted as a general all- an .09 or .10 is about max. Use the same Model experts stand in awe at the around sport model, the Spook being rudder size as shown on the plan, and performance of this new Tiny sensation. the airplane to build if you wanted to put the elevator hinge about 1-1/4 So begins the ad in the April 1939 issue bring home the hardware. Model inches forward of the t.e. at the center. of M.A.N. for Modelcraft’s then-new Builder featured plans for the Spook 48 Barney Snyder had an R/C Miss Tiny Miss Tiny gas model, a somewhat similar some time ago; it's Plan No. 973-0.T., hanging from the ceiling of his famous but smaller version of the 66-inch Pacific $3.00, if you're interested. hobby shop when it was located on Ace also kitted by Barney Snyder's The Miss Tiny spans 46 inches, has Redondo Beach Blvd. in Gardena, legendary model shop. Just for kicks, approximately 275 sq. in. of wing area, California. The model was covered on let’s look at the rest of that ad: “ Deluxe and would therefore have to weigh a one side and was open on the other, and kit contains spun cowl, silk, 2-1/2" Voit minimum of about 15-1/2 ounces to fly there was some sort of ancient single­ Air Wheels, cement, dope, die-cut ribs, in Old Timer events. It was designed for channel gear installed. The model hung plenty of good balsa, and full size plans. Class A and small Class B enginessuch as there until Barney sold the shop some Price: $3.95.” As if that isn’t enough, the Ohlsson .19, Arden .19, Bantam, or years ago. you could get the same kit with bamboo Ohlsson .23. By the way, R/C MB’s Miss Tiny plans paper instead of silk for a buck less! For The model looks pretty good as far as are duplicates of original Modelcraft yet another buck off, you got everything the structural design goes, but as usual, drawings and were supplied to us by but the wheels, covering, cement, and we managed to find something that Otto Bernhardt, who got them from dope. Or you could get the plans alone doesn’t look too swift. This time the Barney before he sold his shop. for 25«. (Compare that to the $3.00 roblem is with those hooks for the wing you’re going to have to pay to get them old-down rubber bands. Please don’t

40 R/C MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 116

DECEMBER 1979 41 A very unusual electric canard seaplane by Rick Ruysink, of Holland. One good feature of Rick's flying machine is that it takes off every Spans 5 feet, weights 5 lbs. Not the easiest plane to fly . time. Water handling is reported to be excellent. Y v '

ELECTRIC POWER / By MITCH POLING PHOTOS BY AUTHOR

• The electric planes in Europe, accord­ (wish mine did that!) but is hard to fly, as ing to the letter written by Dietmar Volks the response to the canard elevator is (West Germany) and published in the sluggish. He says it is not a good idea to March issue oř RCS, are much bigger turn the motor on again if the altitude is and more powerful than the ones here. less than 100 feet. The water handling is Part of this is due to the larger motors very good. Rick also flies a six-foot Astro available, which get into the 40 size 05 sailplane of his own design, which category. Rick Ruysink, of Delft, Hol­ flies very well. In fact, Rick placed land, sent some information on these second in the electric glider finals last and photos which show the philosophy year in Holland, and this was with the in Europe for aerobatic competition plane just barely tested. Rick also does a planes. His friend Frank Bremer flies a lot of 020 flying, and designs and flies his 6-1/4 lb., 66-inch span stunt plane using own radio equipment to keep the costs Igarashi 7-pole motor on Rick's seaplane. It a Keller 50-24 samarium cobalt motor down, as he is an aeronautical engineer­ swings a 9X4 prop on 18 cells. swinging a 10x7 prop. It uses twenty-two ing student with not too much extra 1.2 An cells for a power input of about money for the hobby. unit, and the climb is much better. It also 370 watts (1/2 hp). The plane shows the Bill Baker, my flying buddy from weighs 12 ounces. This can be a little on trend in Europe towards high wing Norman, Oklahoma, sent photos of his the heavy side, though special designs loadings, fast, groovy flight even in free flight electrics. The Nesmith Cougar can do quite a lot with the VL 101. Hal wind, low drag, and high power. The is about 32 inches in span and is powered Cover's winning indoor R/C electric plane appears to be about equivalent to by a Mattel E-Power module. Bill had to used one, and it weighed 24 ounces! a .40 powered stunt plane. I will be in go to four 100 mah cells to get any climb, Robbie Mehmen had a good-looking Holland this summer, and it will be and it is still slow in climb (from a hand Competition Models Eaglet free flight interesting to see how these planes launch), but is very realistic in flight. It model at the Pasadena indoor meet. This perform. I have seen the twin 25 plane usually places in the contests because of uses an Astro 020, and looks like it kitted by Astro Flight (the Electra 225) this. At twelve ounces, it is a little heavy should fly quite well. Robbie is only ten perform, and it is really impressive, for the Mattel unit. Eight ounces would years old; I wish I could have done as capable of pattern performance. Per­ be the ideal, but would be hard toattain. well at his age! haps it has been ahead of its time; it has Bill’s General Aristocrat is 36 inches, In general, scale models of about 200 been available for five years now! built from a Flyline kit, and uses a VL 101 to 250 sq. in. are about right for the Astro The Keller motors are very innovative. with four 100 mah cells. This delivers 020 F/F unit, with 12 oz. the ideal weight. They use samarium cobalt magnets, noticeably more power than the Mattel The Mattel unit is good for planes in the which are really space age stuff. They are ten times more powerful than the mag­ nets used in electric flight in the USA. In fact, the Space Shuttle has a 17-lb., 17-hp motor using these magnets. A pound per horsepower is better than most gasoline engines will do! I don’t think the Keller motors are quite that potent, but I hope to get one while in Europe and find out. Rick’s own plane is really unique, an electric canard seaplane! It is 60 inch span, 540 sq. in., 5 lbs. flying weight. The battery pack is 18 GE 1.0 Ah cells for a power input of 260 watts on a 9x4 prop. The motor is an Igarashi seven-pole job that weighs 14-1/2 oz., with a power run of 3-1/2 to 4 minutes. This sounds like it is about equal to the Astro 25 or a little Also from Holland, Frank Bremer and his super electric aerobatic ship, typical of the high- more. Rick says it ROW’s every time performance electrics being built in Europe. Uses the German Keller motor with 10X7 prop.

42 R/C MODEL BUILDER Robbie Meh men, 10, had this very nicely built Competition Models One the the few successful electric C/L models. Tony Naccarato's Eaglet on display at the '79 Pasadena IMS show. Astro 020 motor. Baby Flite Streak. Battery mounts outside on top of wing.

100 to 150 sq. in. bracket, with eight voltage going through the wires, and it is ounces about the maximum. The VL 101 not as simple as having the plane carry its is about in between these units, about own power. ten ounces and 180 sq. in. would be Cox markets an electric U-Control, about right. the Charger series, which fly well. They Electric U-Control is rarely seen, but it do need a full circle on pavement or a is quite practical, especially with the smooth floor to take off, but they do Astro 020. I flew control line in the 1974 surprisingly well in the air. The batteries and the 1975 Electric Championships are in the plane, and the two 100 mah and won first with a Baby Flight Streak cells deliver a little less than the power of with an Astro 020. I even did a loop! The a Cox .010. It would make a good F/F Baby Flight Streak is especially good unit too, for planes under 8 oz. because it is a smooth flier with gener­ Last but not least, back to R/C and ous wing area. The wing is thick enough Hank West's answer to Dale Black’s Miss to put the 020 R/C battery pack inside it, Fragility (an Astro 05 sailplane with all which I did. Tony Naccarato had an 020 built-up construction), only in the 020 Baby Flight Streak on display at the size. It uses an Ace rudder-only pulse Pasadena show, and flew it several times, radio,andthermalswell,but Hank hasto much to the delight of the audience. get it trimmed so it’ll do something Tony mounts the battery pack on top of besides circle! Once Hank has the trim the wing, which makes a simple installa­ settled, this will be a good one. It weighs tion. The overall flight weight should be 18 oz., and has a 60-inch span and an in the 10 oz. bracket. I used the R/C area of 300 sq. in. Until next time, enjoy battery pack (550 mah), but this gives all the many ways to go electric! · such a long run that I got quite dizzy (yes, I fly mostly R/C!). Next time I will use the F/F pack (250 mah) to keep the time down. And yes, you can run the power through the control lines, with the battery at your waist, and this has V L 101 installation in Bill Baker's General been done frequently, but it doesn’t Aristocrat, built from a Flyline kit. appeal to me. The battery loses half of its

Bill Baker's Nesmith Cougar uses a Mattel E-power unit with four Hank West and his fully built-up Astro 020 powered sailplane. Ace cells, produces a slow, realistic climb. radio, 5 foot span, uses straightforward construction throughout.

DECEMBER 1979 43 A before-covering photo of John Boyd's Velie Monocoupe, built from an Astro Flight kit. A Black Widow does a fine job of hauling this realistic flier around the sky. Structure is very light. Nose section is sheeted with 1 /64 ply for extra strength. tension, speed, and response rate in­ formation are all coming to you through touch, not remotely through the eyes. You can see too, of course, but that means that you have even more in­ " * formation. The only R/C models which 1/2·A s c m come close to the responsiveness of your average control liner are the hot By LARRY RENGER p h o t o s b y a u t h o r racing planes, and they usually only turn left. Try to take your aerobatic sport R/C • Why control line in an R/C world? I course, the fact that you don't need at through three consecutive vertical got the yen, the other day, to build a least a hundred bucks’ worth of R/C figure eights in under 10 seconds some­ control line model even though I am up gear to get into the air. You have only time. And there just isn’t anything in to my ears in R/C flying and equipment. your starting battery to worry about, and R/C which can come close to the per­ Lots of people have never bothered to you can share that with others. Of formance of a C/L combat model! get into R/C at all. After a bit of reflec­ course, control lines are a bit more As it happens, I fly free flight, too. I tion. I came up with several possible reliable than radios. You can see the have always wondered how come some reasons. The most obvious one is cost. A flaws in a mechanical system if you look modelers are at each other’s throats, 1/2A control line model kit costs less for them, but electronics are much more with the various factions acting like the than half of what an R/C model would subtle. Even simple broken wires and others were stupid or downright evil. for the same engine. This is related to cold solder joints often take some really Hey, guys, we are all modelers. There are both the model size and complexity. careful search to find. lots of anti-model people out there to Most control line designs are very old To me, however, as a well experienced bad-mouth without picking fights with (Midwest seems unique in bringing out modeler and owner of R/C gear, there is members of our own clan! I figurethatif fresh new designs over the last few one very great attraction to control line you are a modeler, the best type of years), so the design and tool-up costs models. The key is the feel and respon­ model is only what you happen to be have long since been paid off. The siveness of being physically in touch flying right now. Each of the other types volume of kits is much higher than for with your model. By George, you have has its advantages, disadvantages, and R/C, since they are quick to build and, the controls in your hand, you can feel unique thrills. Each phase of flying has its being flown primarily by unassisted how that model is flying. If it is a light, good guys and creeps too, probably in young fliers (that is where the Juniors responsive stunt model or a fast racer or about the same proportions as the are, by the way), they don’t last long. a heavy scale model, you can tell it with others. A second reason for the low cost is, of your eyes shut, just by the feel. The line BEGINNER’S WORKBENCH This month I think I’ll say a few words about how to clean an engine. Of course you and I never crash, but perhaps you know someone who has, and you just want to help him out. Even a crash onto clean asphalt justi­ fies an engine teardown and cleaning if you want to keep the thing running for anything like its potential life. There is no such thing as á clean crash. Also, there is no way to properly clean an engine without doing at least a partial disassembly on it. Grit won’t just blow out of your engine the next time you run it; it gets imbedded in the metal and just keeps cutting away at umpty-zillion revs per minute. Really neat C/L trainer, also by John Boyd, features a pop-off wing and pretty darn thick air­ Now, what equipment do you need to foil. Left-hand prop keeps the model out at the end of the lines, where it belongs. do a good job? Not much, actually. A

44 R/C MODEL BUILDER Newest engine from Cox, the R/C Bee. Not a Ted Strader has designed some of the nicest R/C models in recent years, and his "C orky" 1/2A reed-valve job. Details in text. flying boat is no exception. Simple yet attractive lines are typical of Ted's models. few scraps of clean, soft cloth, an old crankshaft, venturi, and up inside the John’s second model is built from toothbrush, a few pieces of dowel, piston. Even flush out the glow element Astro Flite’s Velie Monocoupe kit. He perhaps some steel wool if you want to cavity, you can store enough grit in there covered it with silkspan and Sig Lite- de-varnish the engine while you have it to damage your engine. If the cleaning Coat dope. He says it weighs in at 3 apart. For cleaning I like rubbing alcohol, solution has visible dirt in it, change it ounces over the recommended 25 but it must be followed by careful drying and do the whole thing again. You want ounces, and has a very tired Black and oiling to prevent rust. The proper the engine to be totally free of grit, and if Widow on it, but despite 10 mph winds, wrenches and screwdrivers for your you can see it, some will settle out on the it is a joy to fly! Says John: "Its slow engine are a must, too. Stripped screw parts you just cleaned. powered flight, modest climb, and long, slots are one of life’s greater frustra­ Dry all parts with towels, a hair dryer, long glides give it a sense of realism in tions. (When it comes to Phillips head or your hot air gun. You can even bake the air. Those relatively big Williams screws, by the way, Japanese ones use a them at 200°F in your oven. Oil all the Brothers wheels afford a nice roll-out on shallower angle than American; you parts, then reassemble. Try each fit to our grassy flying field." have to file a new taper into the tip of see if it is running smoothly. If not, check The next four photos were all shot at your screwdriver for them!) for remaining dirt, lint, or unnoticed the 1979 International Modelers Show in crash damage. Pasadena, California. First is Ted The minimum cleaning requires re­ Strader with the Corky. Ted kits this moval of the glow plug or head, and the Enough on that, let’s see what you design and flies it as a seaplane with engine backplate. Slosh and wipe out guys are doing out there. First up, John three channels on a throttled .049 Black everything you can get at and reas­ Boyd (3005 Mayfair Dr., Sioux Falls, SD Widow. Ted has contributed a tremen­ semble. It helps to turn the engine over a 57106) sent photos of a couple of new dous number of sport 1/2A designs to few times too. Although better than models. The first is, would you believe, a our hobby over the years. Look through nothing, this is really inadequate to get trainer for his son to learn control line your magazine collection and you’ll find grit out from the crankshaft bearing on. John obviously believes in doing them. Ted’s company is “ Special Edition area, and there is the risk of leaving things right. The airfoil is a 24% semi- Plans,” and Ace R/C carries his line of some water in there, too. symmetrical to give smooth, slow re­ kits and accessories. sponse with lots of lift. The model is For best results, do the above first to Cox has a new engine designed for the get the major crud out, then completely moderate size at 24-inch span and 120 R/C modeler, to be called the R/C Bee. I sq. in. wing area. He kept the weight disassemble the engine. That way you understand that it is a rear rotary, not a down at 6.5 ounces despite the added minimize the scraping of dirt in taking reed valve engine, and that it has a clunk the engine apart. Now, use the tooth­ feature of a wing held on with rubber tank built in! Top that off with a throttle/ bands to help reduce crash damage. The brush and a bath of fresh alcohol or even muffler combination and you have the soap and water to thoroughly scrub all engine runs clockwise with a 6x3 Tor­ 1/2A engine we have all been waiting bearing and other surfaces. Use the nado pusher prop to give the best line cloth and dowels to get inside the tension. Continued on page 98

Latest 1 /2A kit from Cox is the Warlock .05, a 32-1/2 inch sport Cute little outrigger hydro for .10 size engines, the " L il Rascal" model for 2 to 4 channels. Not designed by Lee Renaud! from Dumas. High performance and great fun on a limited budget.

DECEMBER 1979 45 • There is no substitute for a direct In Figure 1 we see A, running down­ knowledge of the yacht racing rules. wind on starboard tack. B and C are They are not simple, and many fine approaching on port tack. At this point B points can be debated. However, com­ should be thinking ahead. He could mon sense is usually the most reason­ have tacked at such time as to have kept able guide when one is confronted with clear of A (as at B*). B was unable to bear of only the few rules it really knew, a dangerous situation. A good example off to starboard due to the presence of port/starboard and leeward boat. B occurred at an early regatta this year. C. C should have been thinking ahead argued in vain that at a certain point she The location is not important, nor is the too. In his present situation he could not was unable to tack away from C, and identity of the race committee who tack because of B. and could only bear having no choice but to continue on made an improper decision in the case. off to starboard hoping to clear A. The ort tack, A became an obstruction for What is important is that the situation boats were 50/800's and the wind was er. C should have given B room by illustrates what happens to our sport 12-14 knots, so the situation was devel­ bearing off so both could clear A s bow. when winning-at-any-cost outweighs oping rapidly. the race committee should have penal­ the joy of sailing. Boat A must have been moving well, ized C for failure to give B room at an given the wind strength. Whether he obstruction. was a leg ahead or behind was not Each skipper was using a very limited important. In order to make the best view of the rules. Worse than that, they time on the course, he needed to keep preferred to cling to their "rights of up his speed. Even though he was the way” rather than anticipate the develop­ privileged boat on starboard tack, he ing problem and use common sense and could have easily hailed B and C and told good seamanship in avoiding the even­ them he would pass astern of them, as in tual crash. A*. His alteration of his course would have been small, and he would have It is unfortunate but true that race kept his speed. committees are often drawn from the So we see that as the situation devel­ ranks of those who don’t really know the oped, each boat had options that elimi­ rules. Even worse is the common prac­ nated a future collision. tice of having the committee drawn from among the competitors, those who What actually happened was that A are most liable to be involved. bore straight down, maintaining course and speed as the privileged boat should. The best approach is for the skippers Whether he hailed or not, B and C were on the water to avoid mixing it up. faced with avoiding him. C was pressing Continual hailing between crossing his effort and pinching up on B to the boats or overtaking boats goes a long point where B could not tack, for in so way toward maintaining order in the doing her stern would swing and hit C. C fleet. In our example, a simple hail from did not bear off and eventually a colli­ A that he would pass astern would have sion occurred. left B and C to scrap it out on port tack to their hearts’ content. Boat A may have John Krick, 1978 Star 45 ACCR Champion. At the protest meeting B was found been able to either cut B and C’s lead or His winning boat. No. 99, still sports a patch guilty of failing to keep clear of C and extend his by such a tactic. In fleet where our "Strictly Sail" columnist clobbered hence causing the tragedy. The protest it in 1977. E.F. Burnhans photo. committee was interpreting on the basis Continued on page 108

46 R/C MODEL BUILDER MISS TIN Y O .T...... 40 f R E j J U G H r STARDUSTER TOO ...... 48 F R E E FLIG H T S C A L E ...... 50 F/F SC ALE A T TH E N A T S ...... 52 AND CO N TRO L L IN E ...... 54 C/L COMBAT AT THE NATS ...... 56 HANNAN’S H A N G A R ...... 58 ^Pa/trol line PEANUT CHI RIBIR I N.5 ...... ""θ F R E E F L IG H T ...... 62 C/L AT TH E N A T S ...... 65

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Bob Haight's diesel-powered Bellanca Columbia chugging by on one of its flights at this year's Nats. The model was awarded the highest static scale points, but engine problems prevented its making an official flight (20 seconds minimum). Photo by John Preston. PHOTOS BY AUTHOR AND PAT CAMP this isthis for stab notadjustment so you will The original model had 1/32x1/16 caps1/32x1/16 had model original The balsa, medium edgeswith the Laminate aCC with be alsoCouldflown two-seater bipe. ular homebuilt The vertical tailis vertical scaleThe in andsize simplicity. shape, is and and lightness plan the for onsuggested shown is tail flat A shape. bottomstreamlined to sanded and were topand on rib each to added show. cutout; plansfin the by formed the slot the Note like pieces several in itcando you or can, youif piece one in origi­ the 1954, designed Stolp In pop­ scaleLouamodel rubber of pretty • really A . . . GARDNER STEVE By have separate build tofor elevators trim. airplane. the of grace the capture Too, Starduster SA300 the of version air­ this make horsepower added and wing elliptical beautiful of line long a giving it a span of 18It the follows inches. the is of version design 25%larger a Stolp Too, Starduster second The else. all above airplane beautiful a want who 48 help. will experience previous little soandshapes, odd a of curves full isstill to attempt an in closely very original seat second The Starduster. original the homebuilders for conceived biplanes alsraeotie rwelat;bs e slct n solntb ad.i' pplrarln)adbid or oe o match. to model your build and airplane) popular a hard...it's be (shouldn't one locate is bet best wheelpants; or outlines surface tail Stolp line. inmostthe plane the popular nalStarduster. This design was the first of Two photos showing the relatively simple framework. Wing t.e. laminations are not hard to make. Full-size Stardusters often have different havedifferent often Stardusters Full-size make. to hard not are laminations t.e. Wing framework. simple relatively the showing photos Two Start the model with the tail surface. surface. tail the with model the Start hs oe i a /-nh o h foot the to 3/4-inch a is model This While the model is relatively simple, it simple, is model relatively the While a cagd h sae f h fn or fin the of rudder. shape the changed has if the builder tosee mightyou ple, check exam­ aspecific building are you if but stab area is evident in this photo. this in is evident area stab h uhrwt i trciebpae Large biplane. attractive his with author The ad ad an te omr ta make that formers the paint and sand, pieces. small other and formers the all ae h fres u o sf bla as balsa,loads. Fill, any carry soft structural don't they of out formers the Make up the backrests and instrument panels. instrument and backrests the up The fuselage is started by cutting out cutting by isstarted fuselage The >2 motor. o ifrne n pcfceape. Be examples. specific in differences for heig Te gu wt eoy t the at epoxy with glue Then sheeting. emsad out. standseam drilling the hole for the 1/16 I.D. alumi­ I.D. 1/16 the when for hole thrust the drilling down the include to sure look to place another is This plans. the C hog te ml hls n h bottom the in holes small the through dries. it while itsquare hold to board building the on upside-down frame the jig can stillis you glue wet the While forward. working other to insure identical sides. Don’t Don’t they sides. because diagonals the of identical any omit insure to other ence in thickness will make the cowling cowling the make will thickness in ence differ­ The balsasheet. soft medium the align­ in errors eliminate to frame the on tions shown plansthe are to be cut on u ue bearing. tube num of medium balsa, starting at the tail andtail atthe starting balsa, medium of h o longeron. top the top the hold they importantly more and et Ad h bnppr rp then wrap, bondpaper the Add ment. eas eeyhn i pstoe by positioned is important, everything is This because straight. longeron bottom, the on curve pretty the hold on one top fuselage sidesbuilt of are the end and omitting the spar notches until notches spar the omitting and end the in fairings the of shape the to cut balsa uprights The and for the diagonals. hardbalsa for the longerons and medium outlines out of basswood. Make the ribs the Make basswood. of out outlines cover. or paint and shape balsasoft 1/8 of made are fairings gear landing The epoxy. with together glued of medium balsa and pin in place. Glue Glue place. in pin balsaand medium of to place in rib each lay and board the spar the Cut spars. the for mark locations to itthe against rib each of front the later. longat aftthe little a them leaving next, streamline atothick them Sand photos. and shape streamline to sanded balsa h rb i pae n ad h gussets. the add and place in ribs the edge to trailing the add Next prob­ later. lems avoid to accurately very notches mark where to trim it. Cut the spars outthe Cut it. trim to where mark eeping in mind that the stringer loca­ stringer the that mind in eeping rooves in the ones that need them, them, need that ones the in rooves roper forward rake angle. Carve the the on shown shape Carve the to angle. noseblock alsa rake forward roper Bend the gear wire toand fishshape itthe gear wire Bend stringer the cut and formers the Add made crossbraces with sides the Join Build the fuselage frames using very very using frames fuselage the Build Start the wings by laminating the the laminating by wings the Start ul te aae tus u o hard of out struts cabane the Build i te edn eg dw ad butt and down edge leading the Pin R/C MODEL BUILDER MODEL R/C Continued on page 98 page on Continued FULL SIZE PLANS AVAILABLE - SEE PAGE 116 DECEMBER 1979 49 Ken Smith shows off his highly unusual Peanut "Payen," a surpris­ Mik Mikkelson ready to launch his Blackburn Skua, slightly enlarged ingly good flier. It's amazing what these guys can make fly! from Earl Stahl plans. Site is Cal State Dominguez Hilts, Carson, CA.

FREE FLIGHT SCALE By FERNANDO RAMOS • Now that I have my feet back on the This leads me into how you can make the fuselage from rattling around in the ground, so to speak, after Oshkosh, I carrying boxes for transporting your box, and the box can be picked up have had a bit of time to get some models to and from the flying field. In almost vertically without fear of dislodg­ serious modeling done, preparing for my instance, I can never find cardboard ing the model. Very simple, yet effec­ the Flightmasters Annual. Not only that, boxes that are just the size I need to carry tive. Finish up with a shallow lid made to I have been working on some drawings my models in; therefore, I have to make fit the box, and then some heavy twine for my rubber entry for the 1980 Flying my own. Some of you might think that for handles on either end, if desired. Aces Annual. Even though there appears the effort is not necessary, since you can K&S, who handles all of the brass and to'be almost a year to go for this most just toss them into the back seat or aluminum tubes and other shapes which outstanding event, and one that you arrange them carefully in the trunk of one finds in his favorite model shop, has scale modelers ought to plan to attend, it your car. Well, I can’t disagree with you, a real neat tube cutter. For years I have is not too early to get your models built but my lesson was learned when coming used either a razor blade or Zona saw for and test flown. The competition is fierce home from a contest one afternoon. I cutting tubing. Recently I got a hold of in spite of the fact that the overall turned a corner just a bit too quickly one of these tube cutters and found it to contest is low key, with the emphasis on when I heard that distinctive sound of be a real useful tool around the shop. It fun. This is one place at which you do crunching balsa. Seems that a heavy is a miniaturized version of a regular not want to show up with an unproven object I had on the seat clear across from tube cutter. Each cut is a square cut, and model. One remark that shows the low my handiwork shifted in the turn and it will handle any size that modelers will key attitude of this contest was made to completely destroyed my model. usually need. Try one. me by Don Srull, who is already prepar­ The same corrugated material that While on the subject of tubing, K&S ing his fleet for next year; "Our models regular cardboard boxes are made from also handles streamline tubing. I know are so secret, we only fly them in the can be purchased from good art stores. that this is not new to most of you out dark!" From this material you can make any size there, but I have never used any except My method of getting my models box you need to accommodate your for exhausts on a WW-I BE-2e a few years back there next year has to be different models (see Fig. 1). Scotch makes a good ago. However, the other day, while than the one I chose before. I had tape which is used for wrapping pack­ finishing my Flyline General Aristocrat, I shipped four models in a box 18x30x30 ages for mail, which can be used to hold had everything completed except the inches to Hurst Bowers. Hurst in turn the corners in place. If you want to get struts. For some reason, I didn’t want to graciously carried them by car to the fancy, you can reinforce the upper ridge go through the trouble of shaping them contest. The cost of this operation was of the box with some 1/4x1/2 pine. I use from balsa, and to make special fittings staggering to say the least, and certainly, white glue and staples to hold the strips for attachment. I took some of the 1/4- I will not go this route again. Instead, I in place. Place rectangular pockets for inch wide streamline aluminum tubing plan to build a model or models which the wheels to fit into, then glue a couple and cut them to the correct length. I will come apart and fit into a carry-on of strips of balsa (1/4-in. sq.) vertically on then fitted the smallest of the Robart box on an airliner. Bill Noonan did this either side of the rear of the fuselage, hinges into each end. These were at­ and it worked out most satisfactorily. just ahead of the stabilizer. This keeps tached using five-minute epoxy. In the

Even died-in-the-wool hardcore F/F Scale maniac Fernando Ramos builds an R/C model once in a while, his latest being this Fairchild 22 from a Flyline kit. Weighs 2-1/2 lbs., flies beautifully with an O.S. .10. Color is red and silver. Spans 48 inches.

50 R/C MODEL BUILDER heavier models, and in particular, gas models. Therefore,on your next project, I recommend that you consider some kind of reinforcement where you would normally grip the fuselage (see Fig. 2). Probably a triangular gusset will be more than adequate on a rubber model. It may take a bit more for a gas model, but at any rate, it sure could save you some grief later. Next, I would like to mention a few items regarding covering. All of us appreciate a model which has an excel­ lent covering job. There is no question that covering is a kind of art form, and there are modelers who can do this task with little effort and with magnificent results. I have mentioned on many occa­ sions how you can cover a model and get pretty good results, so I don’t want to go wings and fuselage, I provide small which bottle I have poured from. Now into the same detail now. However, blocks that the fittings could be secured I’ve conditioned myself and I always there are a few items which I have not into. These in turn were also attached reach for the blue cap bottle first. Is that talked about before that could help with the quick-drying epoxy. The whole a hint or is that a hint!? some of you on your next covering job. rocedure took less time than it would First off, if you have an idea of where With hand launching being done there could be a problem, then by ave to make just one balsa strut. The more and more, I believe that there is a same principle can be used for cabane avoiding it your job should turn out need to reinforce the area of the fuse­ better. and interplane struts on biplanes. The lage where it is natural to hold it for weight is negligible and the appearance As an example, take a look at Fig. 3. If a launching. How many times have you fuselage you are covering has a string­ well worth it. Incidentally, the hinges given theole heave,onlytohavegripped will come apart during impact, so that ens) on the side, what can happen is that a bit too tightly on the launch, causing the tissue lays up on the fuselage side. everything isn’t destroyed on a hard or the tissue to rip or structure to give way? unusual landing. I brushed on a coat of This can happen more readily with Continued on page 110 Floquil, which covered them in one coat, and the hinges actually look like wing attach fittings. The next hint that I’m passing along will make some of you wonder whether it's worth the space in this column even to mention it. Well, I’m going to pass it along anyway. Most bottles of epoxy have two different colored caps. I use Devcon, and it comes with a blue and red cap on the bottles. Some have black and red, etc. OK, when I mix I always use the blue cap bottle first ("b” before “ r"), so that if I’m distracted by a phone call, or if a neighbor drops in to talk, when I Another of Fernando's just-finished projects is this General Aristocrat, also from a Flyline kit. get back to mixing the epoxy, I know Orange and black, weighs 8 oz., powered by a Cox .020 with Davis Diesel conversion.

DECEMBER 1979 51 Tom Comparet launching his electric A SL Valkyrie. Model was reluctant to take off, was destroyed in a hand launching attempt. FREE FLIGHT SCALE AT THE + ^ % By BILL STROMAN + PHOTOS BY LARRY KRUSE AND JOHN PRESTON NATS! ■ • To a Southern Californian, the Nats at and perhaps most important, helping Lincoln, Nebraska was looked forward Free Flight Scale by attending the events to with mixed feelings. The tales of high instead of complaining about the low winds, tornados that had more force attendance while staying at home. This than a Taft trash lifter, corn so tall that latter burns me more than anything else even a Jumbo Scale model would be lost when I hear it. forever, and no beer sold on Sunday!! So, with four models, a five gallon can However, on the plus side was the of gas, my Datsun pickup, and Bob enjoyment of seeing old friends, making Haight's tent trailer, plus his models, we new ones, seeing different models and set out for the Nats at Lincoln. I won’t go new techniques of how to make them, on about the trip there, as I’m sure you want to hear about the Nats, but we had a ball getting there, saw many sights . . . Golden, Colorado for instance. By the way, we didn't use the gas until I got back to LosAngeles; plenty of gas on the way at below a dollar a gallon!! Carl Miller's Comet Taylorcraft took 3rd in The first Saturday night was spent at Gas. One of the few glow-powered entries. the scale judges meeting; as I have a big mouth. Bob and I wound up being static this, there were four Fikes and eleven judges for all the events in Free Flight other designs from a Volksplane to a Scale that we were not entered in. This Curtiss XF-13-C1 monoplane fighter. may seem like a lot of work, and it is, but The Curtiss was made by Lloyd Wood how else can one really see how well Florissant, of Missouri, and looked great some of the models are made, and what in its yellow and silver finish; very new ideas can be picked up for future detailed, too! As most of you know, the models? Think about it!! 3-view of the Fike leaves much to be Sunday morning we gathered at Persh­ desired as far as detail goes. Bob Willey, ing Auditorium for Indoor Scale. As I of Lincoln, Nebraska, overcame this by was entered in AMA Rubber Scale, I using colored photos of a full-sized Fike helped judge Peanut. Bill Warner’s in his presentation, then duplicated Scale Director, John Preston, holds John 01 design of the Lacey was very popular; each detail on his model, right down to dencamp's entry, a Japanese homebuilt. there were nine of them. To balance the pitot tube under the left wing. The

Bob Haight of Las Vegas gets a good launch on his Bellanca Columbia. Bob's Bellanca was highest in static score, but the engine wouldn't Model is highly detailed and is a smooth, stable flier. keep running long enough to post an official flight.

52 R/C MODEL BUILDER Carl Miller's Lanzo Puss Moth flew well, but a low static scale score Don Srull’s Waterman Racer was tops in Outdoor Rubber Scale, kept it out of the running. That's George Perryman holding the tail. In spite of high wind, model turned in one-minute flights.

judges were very impressed with Clar­ bent wing tips, only one engine, and the ence Mather’s Davis DA-5. It even has a wings are in front; how common can tube motor stick inside with wire brac­ one get? Must be because it was a ing, and in spite of being very light, is biplane. Oh well, can’t please them all. detailed and not a ghost ship in anyway, After all the static judging was over, a real tribute to a fine builder. we all took our models into the main The AMA Rubber Scale event had room. This was big, at least to me. I had some very good models also. Among trimmed mine in a 20-foot ceiling gym in these were Ron Roberti’s Heinkel 100D Long Beach; someone told me that the with a great deal of detail, including top of this one was 65 feet or more. Put panel markings and even some oil spills the same winds in as I had in California near the engine. Don Srull haxf a model and R.O .C.’ed the model. What a disap­ of Walt Mooney’s full-sized Piper Vaga­ pointment, it only rose about 10 feet bond, with photos of the full-sized plane from the floor!! Clarence Mather was taken by Walt himself. As this plane was consulted about this, and he told me an early Vagabond, it didn’t have the that the high humidity had caused most black stripe on the side. Bill Knapp, one of the models to gain weight, and would of the judges in the event, told me that require more power to fly as well as in the stripe was not on thefull-sizsd plane California. A larger rubber motor was because of drastic cost measures to keep made, wound, and sure enough, the the company in business at the time. model climbed much higher. That Some thought my Bristol Flying Labor­ Mather sure knows his stuff, and like all Pilatus Turbo Porter garnered second highest atory looked rather odd. Can’t under­ free flighters in Scale is willing to share static score in Indoor Scale for Ron Roberti. stand this, as it’s a tractor, doesn’t have Con tinned on page 104

Bill Stroman continues to come up with strange and unusual scale A very nice Gordon Israel "Redhead" racer by an unknown builder, models. His Bristol Flying Laboratory was an entry in Indoor Scale. Built from Peanut plans in March "75 MB.

Bill Stroman's Stinson SM-2 Junior gets off on one of its usual good Kinner Sportster by Duke Horn was one of a growing number of flights. Won 2nd in Outdoor Gas Scale. Astro 020 power. low-wingers that flew at this year's Nats. Flies well with Mills diesel.

DECEMBER 1979 53 PHOTOS BY CHARLIE JOHNSON

Pat Wilcox, George Cleveland, and Jim Ong discuss possibility of the two pilots getting together in the center of the circle. Anyone for Bill Lee launches his well-known and respected Goodyear. It "Overlapping Circle Combat"? decided to run rich for the last 18 laps so turned only a 6: 0 1.

ontrol line By DIRTY DAN" RUTHERFORD

SORRY ing controversies, not discussing the controversial points (Goodyear cheek Last month I started the column off present one . . . because as far as I know, cowls, for instance) and blasting the saying that it would include a piece there aren’t any. The closest we have whole thing as far out of proportion as dealing with Bob Whitely’s Derringer come lately was a safety proposal to put possible. This type of thing was always model, then ran out of space and said it a ban on single-blade propellers. It was good for lots of points in the rule- would be in this month’s column. If you proposed, voted on with the majority making game. Politics played a big part; believed that, you were wrong again . . . deciding against immediate enforce­ get the "name” guys on your side and I have been desperately searching for ment (safety item, remember), the write letters. Great Fun. that particular copy of Stunt News and Speed fliers wrote their views on the But Ron has turned all of that around can’t find it. Every effort will be made to proposal and the CLCB listened to them, and uses the CLCB members and the get the material into the next column. finally voting to not take any action in procedures to come up with rules that Sorry. banning short-leg props. The Speed will help each event. Some of the rules CONTROL LINE RULES guys are evidently now going to tackle and events are very difficult to deal with, No, not another long tirade about the the problem by coming up with a sug­ so yes, we do still have a problem now CLCB (Control Line Contest Board) or gested construction technique for these and then, but nothing like we used to. the rules coming up here shortly. In­ props and this will be included, if at all When this new rulebook is out and in stead, a compliment of sorts. possible, in the new rulebook. your hands, there may be some new I have been on the CLCB for a few In my opinion, this change in the rules that you don’t like, but damn few, I years now, thanks primarily to District XI lifestyle of your basic CLCB representa­ would bet. Vice President Homer Smith who some­ tive is due to having Dr. Ron McNally as Knowing Ron, I imagine he won’t be how convinced me to "volunteer" for Chairman of the CLCB. He never seems completely satisfied, but I am convinced this job. At the time I was asked to do this to fly off the handle over certain propo­ that this rules cycle went better than chore, being on the CLCB was not sals or proposers, is able to communi­ any previous . . . so much better that I exactly a prestigious position. Still isn’t, I cate with short notes instead of bound congratulate him on a job well done, suppose, but as I spent part of my Labor volumes, understands the procedures and how many times do you see that Day weekend working on the final vote we work under, and knows how to apply kind of compliment paid from the pages of rules to go into the ‘80-’81 rulebook, I these procedures to get where we want of the C/L column? finally realized that today the CLCB is to go. This is an important point. In the Another help in dealing with rules has functioning as should be expected and past it seemed as though the rules cycle been the Advisory Committees repre­ has far fewer controversies than in years was played like a big game. Didn't make senting the special interest groups: past. a lot of difference how the rules came Combat, Speed, Precision Aerobatics, Remember that really stupid contro­ out, what counted was picking up on Carrier, and Racing. As a rule, these versy about cheek cowls on Goodyear models? The people racing the event didn’t care much about what kind of cowl the other guy used, but an indivi­ dual who didn’t even fly the event saw a "problem ” and in trying to correct something nobody even cared about, successfully caused a wild controversy and probably overlooked other items of much more importance in that particular rules cycle. It is not hard to remember more controversies, but that is past history and Father and son Rat Racers by Dave Braun. Big one has a K81B. Dave flies it for fun and to warm the real point is that we are remember­ up for the little one with the TD .049 and left-hand everything.

54 R/C MODEL BUILDER Mike Guthomson brought this Flite Streak appearing ship to the George Cleveland doesn't quite believe Rick Stubblefield s story Nats. Note strange cooling fin pattern in Fox head. about how he just won his match 6 cuts to 2 with his eyes closed. groups poll their members, or at least ALONG THE SAME LINE well, prefer to place themselves upon a conduct their own voting on the rules Directly below Bill’s letter was another pedestal, self-constructed or not, I that will affect their event(s). The results from a friend of mine, Steve Helmick. personally feel they deserve to be there are forwarded to each CLCB member, And it appears that Steve hit a nerve at and when looking down at the majority and even though it is emphasized that R/C MB, as his short note prompted a of R/C activities can indeed be outward­ the Advisory Committees are in fact only quite long and blasting response. ly smug, knowing that whatever those advising, their advice is followed, almost In a way, I can go along with both fellows below have built, they can do it to the letter. Helping along considerably sides. Steve is right in saying that most far, far better. here is the fact that a number of the R/C’ers don’t qualify as being model However, all of us have to realize, as original proposals are made by these builders, so the new title of this maga­ WCN points out, that all of us are into ACs. zine is indeed a bit of a contradiction. our selected activities to have fun. And The ultimate example here is the But the very definition of what is a model it seems that with the R/C activities, the Precision Aerobatics boys. They sent in a builder has changed a lot; there is the fun comes from actually going out and couple of proposals, asked that they be problem. I can point out to Steve (who flying the thing. There is today far less passed, and that was about it. Going in happens to be a very good model emphasis on actually building i t . . . buy they knew what they wanted, no fuss, no builder) that there are those still around it already built, throw together a foamie muss, and going out they probably got it who started model building a long time kit, whatever, but the flying is where it’s (I haven’t seen the voting results yet) ago and can justifiably say that we don’t at. without a single negative vote from the have but a handful of true model As I am one of few who take an active CLCB. builders in the whole world. Their part in modeling activities that are ANOTHER MONTHLY READER, definition of such a person would worlds apart, I feel qualified to illustrate UP TO 14 NOW eliminate anybody who bought any­ an example. In C/L modeling, where In the . .Three if by Air” letters thing ready made for their model. traditional model building skills are section, I see a missive from none other Steve flies a lot of A/2 Nordic, so builds required for any real success, I have than Bill Gieskieng, and in it he indicates complex and sophisticated models. But become (in my own ego-inflated esti­ that he now reads the C/L column. That the last time I was talking with him he mation) a fairly skilled modeler and have is fine, but also means that he hasn’t read was using a trick towhook somebody accomplished a few things of signifi­ it in the past. And after all of that writing else made and sold him. And the towline cance that I am proud of. So, from that Stalick did about challenging me to this reel was somebody else’s handiwork. point of view, I share with Steve and and that, you would think that Bill had Although I find it difficult to define, in others a downward slant in my vision long ago checked out the C/L column to today's terms, what constitutes a model when looking at R/C activities. see what we were up to on this side of builder, it is certain that the person who However, I also fly some R/C models, the challenge. met this criteria would be possessed of although I am not interested enough in For those who don’t know, Bill is a much less in the way of model building them to have gone flying for several genuine F/F nut and” has built some skills than someone like Steve is. So if the months now. For some reason my R/C rather inspiring FAI Power models. After F/F guys, and a lot of the C/L guys as Continued on page 99 years of me reading about Bill, being conditioned to relate his name to "flappers,” I think it only proper that he read, even if force-fed, some of the C/L ramblings. Perhaps Bill went far enough back in his issues to get to the column about the very special Trash Can Event, where a group of Combat fliers tried to stuff their 100-mph-plus models straight into a trash can, the winner getting a prize worth almost $300.00. ‘Twas a classic. Bill, something you as a modeler known to stuff in a plane or two could gleefully relate to. Say, Bill, the Denver area is known to have a few C/L enthusiasts. Might want to check it out, we have several events in Participants at the West Coast FA I Speed Trials, I to r: Bob Spahr, Doug Hinckley, Chuck C/L where flaps are in style.. . . Schuette, Luke Roy, and John Newton. See text for results. Photo by Trials C.D., Joe Klause.

DECEMBER 1979 55 Winners in FA I Combat, I to r: George Cleveland, 1st; Richard Stub­ Duke Fox, George Cleveland, Mike Guthomson. and Pete Plunket. blefield, 2nd; and Gary Fentress, 3rd. All used all-balsa models. The Fast Combat 1st,2nd, and 3rd place finishers. i!cOMBATTi N ATC By RICH LOPEZ

• The American National Champion­ green type of surface. The concentric out hard at work on Sunday, July 29, to ships are always a great pleasure to circles were well marked and accurately see to it that everything was just right for attend and participate in. I look forward measured out. Marlin McGee, the Com­ the week’s competition. The schedule of to renewing friendships with modelers bat Director from Oklahoma City, was from all over the country and even the world. It is a time to exchange ideas and pick up new techniques for model aviation. The 1979 Nationals in Lincoln, Nebraska, were exciting from the com­ petition point of view and satisfying from the social point of view. As always, there were many of the country's top pilots and personalities in attendance. The Combat site at Lincoln Air Park was very adequate, but not exceptional. The field was just that: a field, not a plush manicured putting

Riley Wooten and Jim Mears pitting for Bob Mears. Riley is a 5-time Nats Combat Champ Fantastic shot of David Owen bending over and the designer of the VooDoo. backward to get the kill on Tom Fluker.

I *

Charlie Johnson and Phil Granderson talking Duke Fox tunes the engine (guess what kind) over the situation. Phil was Fast Combat on a model he is about to fly . Dick I mhoff Debbie Imhoff worked the pits. She is shown National Champ in 1978. built it for Duke. here pull-testing Tom Fluker's model.

56 R/C MODEL BUILDER Marvin Denny and Richard Stubblefield have at it in a Slow Combat match. Marvin won. Howard "Ronald McDonald" Rush waits for Kit Gerheardt and Mike Guthomson to get Marvin Denny is happy about being No. 1. his Flite Streak ready. Rand Rozzle in back. He's now the National Slow Combat Champ.

Les Pardue finished 5th in Fast Combat, used Combat Director, Marlin McGee, did a great a TWA engine that showed some power. job of keeping the events running smoothly. minutes. Overall, the conditions were inio Junior, Senior, and Open. In the very good for flying Combat. past this event has been flown only as EQUIPMENT Open. I would have to say that by None of the competitors really had Junior Fast Combat National Champ, Greg Nationals standards, the Combat turn­ any revolutionary new equipment. In Strombeck. Greg won with a Matador pulled out was low. especially in the Junior and fact, one might say that the trend is to go by a Fox Combat Special. Senior events. Junior Slow Combat only back to some of the tried and proven had 8 entries, while Senior Slow Combat pieces of equipment. There were plenty events was the same as that of previous had only 4 entries. Junior Fast Combat of all-balsa designs and only a few of the years, with Junior and Senior Slow had 7 entries, while Senior Fast Combat foamies scattered about. The all-balsa Combat on Monday, Open Slow Com­ had 3 entries. The weatherman was very models won everything. None of these bat on Tuesday, FAI Junior, Senior, and cooperative in providing us with warm designs were anything that hadn’t been Open on Wednesday, Junior and Senior and calm days up until Saturday, when seen before. George Cleveland used his Fast Combat on Thursday, and finally the winds did blow. Fortunately every­ standard design to win Fast Open Com­ Open Fast Combat on Friday and Satur­ thing had finished by that time except bat, as did Richard Stubblefield to win day. for the unofficial 1/2A Combat event. FAI Combat. Robert Autry of Southern One change to note is that FAI Com­ Oh yes, we did have one rain shower on bat was broken down for the first time Tuesday for just a little while, about 30 Continued on page 74

Up from Mexico are Raul Monge and Leonardo Silva. Also part of Good action shot of Ron Esman and George Cleveland getting their the Mexican crew is Francisco Zuloaga, standing at left. man into the air first. A very efficient pit crew!

DECEMBER 1979 57 Moderation is O.K. unless carried to extremes! plete with all materials, sandpaper and glue . . . 25 cents CEE BEE Z STORIES comments on his experience as follows: 3/32" flat rubber . . . 1 cent per foot or Those who have followed the progress Ί knew that I could make an aeroplane $1.25 per 210 foot skein of the Gee Bee Z reproduction through that would fly, but I never dreamed that I 3/16" flat rubber. . . 1-1/2 cent per foot the mentions in this column might care could go one better and make a darned or $1.60 for 210 foot skein to read what the machine is like to fly in hangar that would fly too. However, I am How do those prices grab you, gum- the words of its owner, Bill Turner. starting in again and will be in operation banders? Excellent accounts by him have ap­ in a short time.' " AND SPEAKING OF RUBBER peared in Private Pilot for July, 1979 and Scale Staffel Vice President Bob Sport Aviation for July, 1979. Both THOSE WERE THE DAYS Boehme calls that form of power "Nor­ feature color photos by Japanese fashion Bill Kee, of Twin Falls, Idaho, enjoyed wegian steam," but declines to elabo­ hotographer Hiroshi Seo, which may our mentions of early models, and hopes someone will undertake a more rate further. e some of the finest air-to-air shots ever WRIGHT WAY TO CONSTRUCT taken. For those of you with overseas complete history. Meanwhile, here are a AN AEROPLANE connections, you might try to obtain the few more tidbits from a pre-war George D. Wanner & Co. catalogue, via Sears It was our privilege to sit in on a copy of the Japanese magazine Aviation session at the soon-to-be-reopened San journal, No. 75, which features a full- McCorrison: Diego Aerospace Museum. One of the color fold-out of both Turner's Gee Bee Japanese tissue, 21"x31" sheets . . . each aircraft on display will be a full-scale Z and Miss Los Angeles flying in very 5 cents close formation. And for our readers in 21" A.M.L.A. Soaring Glider kit, com­ Continued on page 68 the United Kingdom, the Aeroplane Monthly has also scheduled an article by Turner. During a recent talk. Bill remarked that it nad taken Ed Marquart and himself five years to build the repro­ duction . . . whereas the Granville brothers did the job in five weeks! AND SPEAKING OF GEE BEES Dr. Julian Steinberg met the most famous Gee Bee pilot under rather unusual circumstances: "Jimmy Doo­ little once used our bathroom back in 1932 when he was testing planes in Long Rollout of the Gee Bee Z reproduction at Brown Field emphasizes the small area of fin and Island; needless to say, the bathroom rudder. Owner Bill Turner is at the tail. became a shrine since 'Doolittle' was here. "In 19461 met him at an officers’ party in Hollywood when he came back with General Patton, and reminded him of his visit to our house when I was 19 years old. Now that I was 33 in 1946, he said I’d grown some." GONE WITH THE WIND From Aero magazine, March 16,1912: "The recent high wind experienced in Los Angeles raised havoc with some of the partially completed hangars at the new Griffith aviation field, and one building, that of Jay Gage, was lifted from its foundation and carried away over 50 feet by the wind. The machines which the structure sheltered were Highly detailed F/F scale Hawker Fury by Doug McHard, one of England's best-known scale uninjured. In a letter to Aero, Gage builders. A good subject for F/F. Photo taken by Pete Redhead.

58 R/C MODEL BUILDER

Well-known flier George Batiuk poses with his Wake. Photo taken at this year's Nats. with 2-piece wings? Are we free flighters DARNED GOOD AIRFOIL so bigoted that we can’t look at the Bogart 560-26 you’re interested, you can write Keith progress being made in other phases of This month's DGA was part of Bill Fulmer, 15688 Kern Rd., Mishawaka, IN our hobby? I’m sure we're NOT, and it's Bogart's paper in the 1971 NFFS Sym­ 46544, for details. just that we sometimes hesitate to try out posium, which introduced a new family A BIG FREE FLIGHT MODEL a new idea on our pet model design. A of free flight airfoils. This particular IS BEAUTIFUL 2-piece Satellite 1300 wing sounds very section has been proven very success­ According to Ralph Prey, writing in feasible to me. Sure would make it easier fully in Wakefields by Bob White and the San Valeers' Satellite. to decide whether to rebuild it after it Walt Ohio. Thesection has 5% maximum “ Building a Class D model is easy DT'd into a pole or cactus if only one camber at 60% chord, and is 6'/. thick at when compared to some of the smaller half of the wing was damaged. Next time 20% of the chord. The rear part of the models (it’s more like carpentry than you are at the local hobby shop, take a airfoil may cause construction problems model building . . . TH), even rubber long hard look at how the R/C boys because of lack of depth. ones where you have to carve the prop. make their 2-piece wings, and then MYSTERY MODEL OF THE MONTH And flying a big Class D ship can be easy check out your dealer’s shelves for the Here's an easy one. It’s a very distinc- too, if you go about it slow and easy on hardware.” Con tinned on page 92 the first dozen test flights. Many fliers flying big Class D ships will tell you that they feel it is easier to fly a big model than a small 1/2A or hot K&B 3.5 design. The big models are more forgiving of adjustments, provided you make your adjustments within reason and not make more than one at a time. “ Transporting a big free flight model can be a problem, especially in today’s small compact cars which so many of us have to use for gas reasons. But I notice the R/C types have figured that out, too. The 1/4-scale models almost all have a 2-piece wing. Same for the R/C glider boys; most all of their models use 2- piece construction. The FAI Power fliers have gotten on the 2-piece bandwagon for the same transportation reasons, so Ralph Prey says Big is Beautiful in free flight, too (see his comments in text). Here Bill Hunter what's the problem with having an AMA prepares his big Satellite for a flight at the Nats. Note fuel can...talk about a gas crisis! gas model like our big B, C, or D designs DARNED GOOD AIRFOIL - BOGART 560-26

DECEMBER 1979 63 i / - / / s AT THE X NATS! ontrol line By JOE KLAUSE X X PHOTOS BY THE AUTHOR • If you’ve been wondering about the health of the patient known as Control Line, there’s some pretty solid lab reports from the 1979 Nats. Normally, when we hear the term "patient,” we think of someone or something that’s sick. Well, in this case the patient seems to be very well indeed. AMA keeps Nats statistics in four general categories. They are, together with the 1979 entries, as follows: Indoor, Free Flight, 202; Out­ door Free Flight, 687; Control Line, 562; and Radio Control, 435. Now, I’m not a statistician, and I don't Jim Ricketts, Sioux Falls, SD, working on mean to urge any particular conclusion his scale racer. Note Fire Plug on his arm. upon the reader; however, it is inter­ esting to note the tallies for Junior, The Tom Flukers, Sr. and Jr. Tom Jr. flew Senior, and Open entries in the four the Goodyear to 3rd place for his dad. categories. Draw whatever personal conclusions you may, but guys, I cau­ win. In past years, there always seemed tion, if a particular category is your to be a percentage who were there just thing, that’s great, but please don’t bad- to have competed, with no expectancy mouth another group, or throw these of even placing. Now, it's good to facts at them to try to prove a personal compete for the sake of competition, point. Statistics can too easily be twisted but it’s tremendous when everyone around many ways. The data is shown in really feels they can beat everybody else. the table. As you can guess, the competition was So much for the overall numbers, let’s keen. In every event, none of the early get into the Control Line story. Combat, leaders strutted about until the last lap of Racing, Aerobatics, and Carrier were the last heat was over. That’s competi­ again very popular. If you’re a Combat tion! Here are some of the results, enthusiast, stop, do not pass Go, but together with the number of entries: proceed directly to Rich (alias Dirty Dan) Tim Gillott launches his Goodyear. Note the Von Lopez’ in-depth coverage else­ GOODYEAR (Open 28) "starting stick" in his right hand. where in this issue. 1) Bill Lee ...... 5:46.3 RACING 2) John Ballard...... 5:48.6 Call it a figment of the imagination, a 3) Tom Fluker Sr...... 6:03.0 visceral feeling, or what have you, but It’s only fair to mention that Tim Gillott my impression was that everyone who flew a fourth place 6:09.2, and that raced at this Nats sincerely felt he could included a plug change! * NUMBER OF ENTRANTS AT THE 1979 NATIONALS *

Category Entrants Entries Junior Senior Open Indoor F/F 76 202 60 (29.7%) 30 (14.9%) 112(55.4%) Outdoor F/F 178 687 127(18.5%) 82(11.9%) 478 (69.6%) U-Control 263 562 59(10.5%) 72(12.8%) 431 (76.7%) Bob Oge pitting his Goodyear entry. Another R/C 360 435 10(2.3%) 42 (9.7%) 383 (88.0%) Glo Bee Fireplug, on another arm!

Mike Hazel and John Thompson, the Nitro Kerry Turner about to pass Big John Ballard Tim Gillott with his Shark. Note finger... he holies racing team from Oregon. during a Fast Rat heat. must have forgotten his "starting stick"!

DECEMBER 1979 65 Tim Gillott about to catch his Shark. Tim was 2nd in Fast Rat with 4:53.5.

It’s a distinct pleasure to comment on the father and son team of the Tom Flukers. Dad does the pit work, and his son does the flying. Young Tom, a Texan Ron Esman, Fast Rat winner. Ron Senior, also placed in Slow Rat, Fast Rat, won with same engine in Dayton in 1976. A look down the Slow Rat pit line. The and Goodyear, and he took first in all Nashville Rats cleaned up again this year. three Senior Combat events! Take a look and say the Nashville Rats took first and at the accompanying photo of the second once again. Yes, they did, but Ballard’s favorite event. The winners: Flukers. All you Open competitors they had plenty of close competition. In Junior: Marc Robe better remember young Tom’s face. fact, they did not have the fastest quali­ Senior: Tony Smedley When you see it again, he’ll most prob­ fying times. Their reign may be just Open: Les Pardue ably be beating yo u.. . about over. Was it all the O.S. .36? No, If you’re not into Control Line Racing, FAST RAT (Open 24) Bill Lee and several others used K&B but have thought about it, why not try 1) Ron Esman...... 4:49.7 5.8’s. Times between 5:30 and 6:00 are this event? It’s not only inexpensive, but 2) Tim Gillott ...... 4:53.5 now very common. it's a lot of fun. Well, racing certainly 3) Paul Tune...... 4:57.7 FAI TEAM RACE (Open 10) wasn’t everything, so let’s look else­ With three pits in the finals, those 1) Gillott/Ballard...... 8:05.1 where. 2) Jackson/Nelson...... 8:43.6 times are excellent. Seven of the 23 PRECISION AEROBATICS entries were Texans, including Ron 3) Willoughby/Oge ...... 9:09.9 Some people refer to this as “ stunt." Despite the fact that some people say Esman. And how about this: Ron used That’s a no-no, and rightfully so, be­ they’d rather eat worms than fly a diesel, the same engine he won with at the ’76 cause their patterns are literally preci­ Nats! There has to be some sort of a this is a very sophisticated event. If you sion. Not only that, but their models think you’re pretty good at other racing lesson to be learned from that, but as yet have incredibly beautiful finishes. The events, this one just may cut you down I haven’t completely figured it out. entire event has evolved to a point of SLOW RAT (Open 24) to size. It's a real challenge. almost perfection. Doesthat leave you,a 1) Larry H ill...... 5:31.9 MOUSE RACE (Jr. 10, Sr. 6, & Open 13) beginner, out of the picture? No. This was an unofficial event spon­ 2) Paul Tune...... 5:35.9 PAMPA, the Precision Aerobatics Model sored by the Orbiting Eagles of Omaha. 3) Bill Lee ...... 5:40.2 Pilots Association,hasfourskill levelsfor Also, as his friends well know, it’s John One’s first reaction may be to sigh, local and regional contests. Don’t hesi­ tate to give it a try. As you’ve guessed, at the Nats, it was “ top drawer” competition. The accompanying photograph tells the story on the Open scoring. Congratula­ tions to Bob Gieseke, the first five-time Nats winner! At the Junior and Senior levels, here are the winners: JUNIOR 1) Andrew Harrissiadis...... 429.0 Three original Slow Rat designs by the Nashville Rats. They took 1st and 2nd for the fourth 2) Kenneth Purzycki...... 387.5 year in a row, but this year the competition was closer than in years past. 3) Jim McClennen...... 348.3

A pair of " L il' Rodent" Mouse Racers designed and built by Joe Mouse Race winners, I to r: Tony Smedley (Sr.), Marc Rose (Jr.), Klause. Write to Joe at Kustom Kraftsmanship for kit info. and Les Pardue (Open). All three flew " L il' Rodents."

66 R/C MODEL BUILDER Scores for the top five in Precision Aerobatics. Bob Gieseke became An original by Dennis Adamisin. An ordinary but very eye-catching the first five-time winner of the event. color scheme. Note four-point landing gear.

Les McDonald's immaculate Stiletto, which he flew to 3rd place. Keith Trostle's nicely-finished FW-190 seems to follow Al Rabe's Won PAMPA "Most Beautiful Stunt Plane" award. thoughts on realistic looking stunters.

SENIOR CLASS II (Open 12) 1) David Fitzgerald...... 473.8 1) Pete Mazur ...... 354.4 2) Kevin Capitanelli ...... 450.5 2) Bob Reynolds...... 342.2 3) Andrew Blank...... 428.0 3) Paul Kegel ...... 329.9 As someone who has perfected the That’s not a misprint. The first three figure nine, let me just say a hearty “well places were identical in both Class I and done" to all the winners. II. Well, control liners, it was a good Nats. CARRIER The site and weather were beautiful. The This has been a very popular event for event directors and helpers did a splen­ many years. The 79 Lincoln Nats was no did job, and everyone seemed to thor­ exception. Here are some of the results: oughly enjoy themselves. In fact, I can’t PROFILE (Open 24) recall a single hassle. Quite remarkable. 1) Frank Kelly...... 241.3 Hope to see you at the 1980 Nats. · 2) Pete Mazur ...... 240.1 3) Leroy Cordes...... 236.5 CLASS I (Open 10) 1) Pete Mazur ...... 357.1 Carl Miller with the Corsair he flew in Class I 2) Bob Reynolds...... 329.6 Carrier. Carl flew in many events. C /L and 3) Paul Kegel ...... 323.5 F/F , at this year's Nats.

Class I and II and Profile Carrier Fairey Firefly entries by Bob About to snag a line is Pete Mazur's Bearcat. Pete got 2nd in Profile, Reynolds. Won 2nd in both Class I and II. also won 1st in both Class I and II!

DECEMBER 1979 67 duced problems unknown in the origi­ nals! We’ve Built the Case for Some concessions to progress were of course adapted in the Valentine flying Your Radio Control System reproductions, primarily for reasons of safety. This included the use of aircraft bolts instead of the wood screws em­ ployed by the Wrights, and the substitu­ tion of chrome-moly in place of cold- rolled steel at points of high stress. For power, the Valentines selected a newer unit (but not much!) in the form of a 1929 Model A Ford engine. This was modified to include such niceties as a more efficient oiling system, compres­ sion release via valve actuation, and an external water pump which cosmetically Single Case r more nearly resembled the type em­ Reg S49 95 ployed by the Wrights. The choice of the Now S29.95 Model A engine was predicated upon its ability to deliver adequate power at low *■ P rpm within established weight param­ eters. Most modern powerplants fail miserably in this respect, which ac­ counts for the tiny “ toothpick” props flailing the air at outrageous rpm in so Double Case many homebuilts. Reg S69 95 When the Wright reproduction began Only $39.95 in San Luis Obispo, California, it was undertaken strictly on a speculation basis, since no sponsorship was available at the time. In fact, Tom Valentine and his wife were working in a restaurant then, and declare the project to be a “ monu­ ment to tips.” When the machine was finally flown it was remarkably successful in spite of It makes sense to want the best in protection for being inhibited by relatively inefficient that major part of your radio control investment. That’s propellers (again concessions to mod­ why we designed highly durable, impact resistant, quality ern “ improvements” ) and overheating problems with the engine, which limited cases custom built to fit your radio equipment. the average flight duration to about six Completely foam-lined for added minutes. All in all, a remarkable accomplish­ these lightweight cases are now ment and a magnificent example of specially priced at just $29.95 workmanship throughout, including for a single radio system Λρτ such formidable assemblages as the radiator, which is almost akin to a fine and $39.95 - piece of sculpture in its execution. Although the “ Flyer” featured in the San Diego Aerospace Museum is a non­ flyer, it is finely detailed and beautifully finished. By all means, plan toexamine it if you visit the area. THE ITALIAN WRIGHTS Shortly after the Valentine presenta­ 7316 NEWTON AVENUE NO.. MINNEAPOLIS. MN 55444 Phone (612) 566-9016 tion, a brief account of Wilbur Wright's flight demonstrations in Italy during tions and almost impossible deadlines. 1909 and subsequent activities of Wright Hannan...... Continued from page 58 Additionally, the studio ordered Wright aircraft in that country was given by and Lilienthal glider reproductions, Contessa Maria Fede Caproni Ramani, reproduction of the Wright Flyer con­ adding complications to an already daughter of the famous Italian designer structed, appropriately enough, by a crowded schedule, necessitating a Caproni. Although little known in the brother team, Tom and Bob Valentine. round-the-clock working routine. As United States, the early aircraft activities The Valentines and their associates other people were recruited to help, it in Italy were to have far-reaching effects constructed the flying reproductions for became obvious that those with no on aviation everywhere, and indirectly, the unfortunate Wright TV non-docu­ previous aviation experience were the on model building. For example, one of mentary of last season, and it was most most efficient workers, as they “ had not the first passengers to go aloft in a enlightening to hear their story of the been polluted with modern tech­ Wright plane was Dr. Pirelli. Yup, the aircraft and models used in the pro­ niques.” This was in keeping with the same one who founded the producers duction. Valentine brothers' belief that the of the rubber strip used today to power The basic Wright reproduction used Wrights’ methods had been demon­ so many miniatures. had not originally been intended for strated in the first place and should work The practical mindedness of Wilbur that purpose and was hastily modified in again. This was in marked contrast to Wright was well demonstrated by the an effort to fulfill the diverse require­ some “ reproductions” which have fact that he insisted upon supplying ments. This involved changes which incorporated “ modern corrections” to quantities of extra spruce with the first were performed under difficult condi­ pioneer designs that inevitably intro­ Wright aircraft sold in Italy, "for when

68 R/C MODEL BUILDER Six great reasons to give or get R/C g ifts from Cox. You've got five exciting, ready-to-run R/C models to choose from And the best selling radio that controls them all The classic Cox/Sanwa 8020. No other two channel system gives more quality for the money. Or provides such precision control for all these ready- built models. Ready-to-run R/C gifts are the best gifts of all. Because the fun starts on the spot. Unwrap them and run them—right on Christmas Day! The breakthrough plane in ready-to-run R/C is our Cessna Centurion Perfect for beginners, the easy flying Cessna sports a factory installed QRC .049 engine and 36-inch wingspan R/C's first ready-to-fly powered sailplane is the giant Sportavia. also with a factory installed QRC 049. That 70-inch wingspan makes for great soaring. And for great sport sailing or competition, launch the 36-600 class Tradewinds. It’s ready-to-float with a pre-painted hull and optional sail winch. In R/C cars, both the Ferrari 512 BB and BMW 3.5 CSL give you speeds up to 30 mph,superb handling, and more: fully assembled chassis; proportional speed control forward and reverse;high-impact, pre-painted body; and a .05 motor, six-cell rechargeable battery pack and extra gear sets all included Whichever Cox ready-built you choose, be sure to include the 8020 radio. Then, expanding a collection of fine Cox models doesn't require the purchase of another R/C system. And that s like getting a present anytime of the year.

Pill UVim . IU U , VAÍA LinjIllC J. COX HOBBIES. INC A subsidiary of Leisure Dynamics, Inc 1505 Ear l Warner Avenue. Santa Ana. CA 92702 Our own "remote control” summary of the venture appears in the October R/C Sportsman. But for the complete coverage, watch for Dr. Morton Grosser's book Gossa­ mer Odyssey, The Triumph of Human- Powered Flignt, to be published by Houghton Mifflin. THEM ARE THE CONDITIONS WHAT PREVAIL This old line from Jimmy Durante seems an appropriate title to this note from Bob Farrenkopf, of Ohio: “ We are having our usual beautiful summer weather, nice, calm and sunny all week, with wind and a chance of rain on weekends and other flying days. Ha." SUSPICIONS CONFIRMED? According to Crosswinds, newsletter of the Cleveland Free Flight Society, there are two classes of Scale, the most popular of which is Standard off-scale. (Emphasis ours!) INDUSTRY RECOGNITION Carl Hatrak sent us a colorful bro­ chure from VARIG, the largest of the Latin American airlines. In it was a sentence that caught our attention: "VAE (Varig Aero Sport) was accordingly created, as an organization for promot­ ing the liking for model airplanes, gliders and, in a special way, aero­ nautics.” DOWN MEMORY’S LANE Frank Scott favored us with this bit of wistful nostalgia: "I doubt very much COMPLETELY READY TO FLY that kids have changed as much as the times have. Seems a shame; we had a lot Ideal for beginning fliers, the Epoxy fiberglass fuselage com­ of fun leaning on the airport fence, and Sea Breeze is designed for the plete with push rods installed, spending rainy summer days in the dark, modeler who wants the best fully painted in white. Wings dusty, and terribly friendly hobbyshop. available sailplane, but hasn't and stabilizer molded from It was not uncommon for me to put 50 epoxy fiberglass, available in miles on my bike (the pedal kind, no the time or ability to build one. Yamahas then) in a day, just making the choice of six colors (red, blue, Utilizing the most advanced rounds of the area hobby shops, and I orange, brown, purple, or yellow). lay-up techniques along with our might not buy a thing (save for an Just install your radio and go fly! molded process and efficient occasional Coke to wash down the dust of travel). Such warm, friendly memories airfoils, the Sea Breeze is strong, Painted — $229.95 . . . and yet, not only is it unlikely that my maneuverable, and easy to fly. Un-Painted — $169.95 own son will experience such, but I DEALERS: Contact one of these fine distributors who handle our kits: would be appalled if he were to try to • A/L DISTRIBUTORS * GREAT PLANES DISTRIBUTORS * MIDWEST MODEL SUPPLY * TECHI-MODELS follow my bicycle trails through the * B PAUL DIST * PAN AMERICAN 'W ORLD ENGINES Additional Distributors Wanted mists of time. A pity, but the happy shops of yore have succumbed to chrome and electronic cash registers; the two-lane R/C AIRCRAFT road is a super highway, and worst of all, 485 EASY STREETΞΤ · SIMI VALLEY, CALIFORNIA 93065 (805) 527-4004 so many cranks and weirdos (and worse) A m r r ir a · Inrgrnl manii/arlM rrr o/ rpo«v /ibirglan /u irla fri loose.” repairs are needed,” not "if repairs are Free Flight Scale were girls! Congratula­ SILLY SIGN-OFF needed” ! Ultimately, according to the tions! Female builders are a distinct Whew, after that heavy philosophy we Contessa, the machine was repaired minority in any class, but lady SCALE had better close on a humorous note, many times, and once almost reduced to MODEL builders are scarcer than pro­ for which we can thank (blame?) Georges kit form. After that damage it was ductive bureaucrats! Chaulet, of France: It seems that some completelyrebuiltinsideachurch.. .an GOSSAMER DOCUMENTATION astronomers were observing the planet edifice that had to be almost demolished Anyone interested in modeling the Mars, and noticed some strange blink­ in order to remove the aeroplane! English Channel-crossing Gossamer ing lights on its surface. Perhaps, they WOMENS’ LIB STRIKES AGAIN! Albatross? If so, by all means obtain a thought, the Martians are trying to A traditional feature of the AMA copy of the September 1979 Aeromodel- contact Earth. After a great deal of Nationals is the publication of a news­ ler magazine, which features the first discussion, the astronomers agreed that letter which gives daily event results and accurate deliniation of the machine to it was necessary to communicate with miscellaneous banter about the pro­ be published. It is accompanied by a the Martians in order to find out what ceedings. We liked the introduction superb account of the epic flight, writ­ they were saying. Finally they evolved a heading this year, which stated: "Any ten by Ron Moulton, an official observer plan to place a series of enormous words misspellings, typos, and other errors are for the Kremer committee as well as across the Sahara Desert in order that inserted at the editor's discretion.” But Editorial Director for the magazine. Also they could be seen from Mars. Using returning to the womens' lib bit, we included are first-ιate photographs of carbon powder, letters some 1 0 0 miles noted that the top four places in Junior the men and machinery involved. high were traced across the desert, then

70 R/C MODEL BUILDER KWIK'HINGE SLOTTER BLAOE AND OUIOE FOR FOR LARGE AND MINI-HINGES SMALL HINGES. THE ONLY UNIVERSAL SLOTTING TOOL THAT NOT ONLY CENTERS, BUT GUIDES YOUR BLADE FOR only $1.95 PERFECTLY ALIGNED HINGE SLOTS EVERY TIME! Cat· No· The black oxided, hardened steel blades fit neatly in a no. 2 x-acto 216 knife handle and work in conjunction with our handy alignment jig that features 3 interchangeable snap-on guides. Two for large and small leaf hinges, and one for drilling 3 stan­ dard size holes to match any type of hinge you choose to use.

8ALSA RICKER HINGES' These nylon hinges are precision molded, SMALL NYLON HINGES inspected and assembled at Du-Bro to insure the finest quality available. En­ Just the right size for those smaller air­ tirely flash free for smooth, quiet opera­ planes. They're easy to install too, by tion. They are simple to install using a using the Du-Bro Kwik Hinge Slotting knife blade or the Du-Bro Kwik-Hinge Device. These rigid, nylon hinges are Slotter. (Cat No. 216.) For total holding embossed and have 6 holes in each side power, hese hinges are embossed and for maximum holding power. For safe­ have 6 holes on each side. Safer than the ty, each hinge is locked together at the removable pin type, our hinge pin is factory and checked for smoothness of o p e ra tio n . already locked in place. No. 116 (6 each) $1.10 No. 117 (15each) $2.49 N °· 118 16 each) $1.00 No. 119 (15each) $1.95

IT LOOKS LIKE AN EXHAUST STACK- BUT IT S REALLY d u - b r o WHEELS A MUFFLER!

SPECIAL TREAD (T) SMOOTH (R) SLICKS (S) K&B.40 Low bounce, shock absorbing wheels featuring the 6 spoke dura hub are of finest quality and are MUFFLER hand inspected. 1.75 T or R Wheels 1 -3/4" $2.40 Pair INCLUDES TWO 2.00 T or R Wheels 2" $2.60 Pair SPECIAL EXHAUST 2 .25 T, R or S Wheels 2-1 /4" $2.80 Pair PORT PLUGS. .J 2.50 T, R or S Wheels 2-112" $3.00 Pair ΠΓΠ 2 .7 5 T. R or S Wheels 2-3/4" $3.20 Pair BLACK ANODIZED BODY. 3 00 T. R or S Wheels 3" $3.40 Pair PRESSURE FITTING INCLUDED. 3.25 T or R Wheels 3-1 /4" $3.60 Pair 3.50 T or R Wheels 3-1/2" $3.80 Pair DU-BRO PRODUCTS INCORPORATED' 480 Bonner Road Wauconda, Illinois 60084 U.S.A.

DECEMBER 1979 71 WE, THE PEOPLE OF THE / UNITED STATES, IN ORDER TO 1 FORM A HORE PERFECT

DEALER INQUIRIES INVITED

REVOLUTIONARY SUPER GLUE SUPER STRONG . . . SUPER FAST. . . SUPER CLEAN AND EASY TO USE! ÉR) a d S e n 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 dealer's. the astronomers took up positions at inlet data of the prior section yields Fig. throat area expressed as a fraction of their telescopes to await an answer. 1 1 , which is a summary of my available bellmouth area (fan swept area). This has Finally it came: “ We’re not speaking data on inlet losses. At the outset, I must been done, since the throat area is the to you; we are talking to the Venusians.”· apologize to my engineering colleagues primary inlet parameter if inlet lip shape who will probably be revolted at gaps in is good and the internal inlet shape is F a n ...... Continued from page 35 data collected and the interpretive good, which was the case for all inlets of liberties I will take in the following Fig. 11. The throat area in the case of Furthermore, one could run a most paragraphs. My only defense is that data, fuselage inlets is the sum of the forward­ graphic demonstration of the effect by time, and resources are limited, prior art facing inlet area plus flush inlet area as simply dropping a sheet of paper over has not dealt to any extent with low defined in the sketch of Fig. 11. The the top inlet with the fan running; the pressure ratio fan inlets, and the need major conclusion of Fig. 11 is that more shock effect of the thrust change on the for guiding conclusions (however tenta­ throat area is apparently required to balance cart was most impressivel Flight tive) is pressing. avoid excessive thrust losses in long tests of the top inlet finally showed the internal inlets. A4D performance we were looking for. The Fig. 11 data on thrust losses of All of the thrust increase was reflected as pod-type inlets and long internal inlets A minor conclusion of Fig. 11 is power for maneuvering and climb, seem to plot up into two distinct bands, illustrated by the solid data points which above and beyond that needed to if only good rounded inlet lip cases are are all no-inlet (or worse) cases. The simply drag the model through the air. considered. Thrust of the particular inlet Grumman 8 -inch square-edged inlet Tne combination of the fuselage inlet as a fraction of the "perfect” bellmouth point shows less of a loss than the same data just discussed with the pod-type inlet thrust is plotted as a function of case for the RK-049, the RK-20, and the

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

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1/3 size Standoff scale 4 Channels required Kit - If $129 95 ______“vS* ’ “ MR. MULLIGAN” 10’ CESSN A 310 TW I

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e v e r y b o d y should have one little vise!

See Your Local Hobby Dealer Hobby Center, Horthwood ALABAMA Hobby Center, parma Gamco Hotiby Shop. Hunts* Hobby Center, K Randall Mock Electronics. Huntsville Reynoldsburg Hobbylaod. Reynoldsburg ALASKA Great lakes Hobbies. Sandusky Pay 'n Save, Anchorage Hobby Center, Franklin Park Mall toledo Hobbycrafl. Inc. Anchorage Hobby Center. Soulhwyck Mall Toledo Pay n Save. Fairbanks Hobby Ceour. Southland Shopping Center Toledo Hobbycralt City. Fairbanks Hobby Center. Westgate Shopping Center toledo Mechels Dept Store, Homer Trumbull Camera and Hobby Shop Warren Dales Promart Ketchikan Boardman Hobby. Youngstown Kanal Hobby, Kenai OREGON Hobby Shop. Petersberg Hobby Center, Albany ARIZONA Eugene's Toy and Hobby. Eugene Hoy's Train Work), Mesa Milwaukie Hobby Center. Milwaukie Crafts Ft Cetera. Peoria Tony's Cratts and Hobbies, lx, Portland Webster's Hobby Shop, Phoenix Handyman. Portland lensen Tools and Alloys, Ternpe Switch Stand Hobbies. Portland F Ronstadt Hardware Co. Tucson ABC Toy and Hobby. Salem ARKANSAS Eastwood Hobby. Salem lorenU's Painl t Walleoveiing. Mountain Home PENNSYLVANIA CALIFORNIA Dplown Sales he. Chambetshurg Handyman, All locations Herb's Hobby Hoose. Doylestown HeathkiL Anaheim Peterman's Hobby, Greensborg Historical Military Hobbies. Anaheim Gilman's. Helleitown The Stamp and Coin Shop, Bakersfield loreski Photo and Hobby. Monroeville The Iron Horse Brea AB Charles and Son. Pittsburgh D SI Hobby and Craft. Campbell Bill and Walts Hobby Shop. Pittsburgh Pay 'n Save Carmichael Borland's Hobby Shop. Pittsburgh Scotts Scale Model Supply, Cerritos Plam Hobby Shop Sharon Pay 'n Save, Citrus Heights Hobbytown. West Chester The Hobby Shop. Costa Mesa Qive a Qreat GVise! Boardman Hobby. Youngstown Mini Trains. Costa Mesa Charter Oak Harrfware. Culver City TENNESSEE Montgomery Ward, Daly City PanaVise ... a great gift idea. Everyone loves a PanaVise. Aardvark's Model Train Shop. Nashville The laughing Monkey Hobby t Craft Shop. Oak Ridge Mike's Model Shop. El Cayon It tilts, turns and rotates every which way to quickly and securely Fresno AG Hardware. Fresno TEXAS Bob's Village Hobby. Fresno position work exactly where wanted. Homers All locations Bertea's Hobby. Hermosa Beach Sturdy all metal construction. Model 301 original PanaVise shown. King’s Hobby Shop. Austin O'Brien lapidary Equipment Co. Hollywood Don Still's. Beaumont Hobby lohn's la Habra Model 381 has vacuum base. Available at your dealers, boxed Hall's Hobby House. Dallas Heathkil la Mesa ready to go, along with a variety of other PanaVise interchangeable Toys by Roy. Dallas ligg's Hobbies and Crafts, long Beach Oielo Vista Hobbycrafl El Paso Bob's Rancho Park Hobbies, los Angeles ______bases, holders and accessories. Bering Home Center. Houston lohn Cameron Supply Co. los Angeles BJ's 6etn and Minerals Houston Huthkit Los Anodes MINNESOTA (Cont.l Clear lake Models. Houston Jim Kennedy's Historical Model, los Angeles DELAWARE INDIANA G i G Model Shop. Houston Natick Store, los Angeles Hobbr-Art Wilmington Heubergers' Hobby Shop. Bremen Hub Hobby Center. Richfield Hobby Haven. Houston Hobby Castle. Merced Hobby Hamlel lx. Evansville Moeller's Hobby Center. Robbrnsdale Wins Hobby Center. Houston FLORIDA Tom Metrler Hobby Center. Inc. Indianapolis Myrtle Avenue lumber, Monrovia Semaphore Hobbies, lx. Bradenton MISSOURI Metallurgical Supply Co. lx. Houston Mclane's Historical Model. Monterey Spencer Cratl Hobby. Seymour Hobby Town, Kansas City Southland Hardware Houston Arts Hobby. Jacksonville Hobby Center. South Bend Pini Hardware. Kavato Colonial Photo. Orlando Astro Hobby House, Si Louis Warrens Hobbies. Houston Orange Tool Mart. Orangt H/R Trains Inc. St. Petersburg IOWA Toy Box. Springfield Peyton's Midland Seaport Models. Orange Maior Art and Hobby. Oavenpor! Warrens Hobbies. Pasadena Panorama Hardware, Panorama City GEORGIA Hobby Craft Shop. Marshalltown NEBRASKA Dibbles Arts and Hobbies. San Antonio Ace Model Shop. Pasadena Ancrona. Atlanta House of Trains. Omaha Dick's Hobby Shop. San Antonio Pay 'n Save, Redding Heathkil Atlanta KANSAS Fs Hobby Haven, Kansas City Hobby Center. San Antonio Montgomery Ward. Sacramento Dux Mixture Hardware. Atlanta NEW JERSEY Pay 'n Save. Sacramento Hobby Town. Overland park Ever Ready Sport and Hobby Center. Bloomfield VIRGINIA Montgomery Ward, San 8ernadino HAWAII Heathkil. Mission NEW YORK Model Masters lx. Annandale I i M Hobby House. San Carlos Nrkko Gem and Mineral. Honolulu KENTUCKY Hobby Hutch. McLean Browns Hobby Center. Bronx Hanover Hobbies. Mechanics* The Whistle Stop. San Diego Radio Shack. Hilo Heathkil. touisville Field's Hobby Center. Buffalo ID Penny. Norfolk San Diego Hardware Co. än Diego Radio Shack. Lilroe Willis Hobies. Mmeola LOUISIANA Southern Hobby. Norfolk Fox Hardware lx. San Fraxtsco ILLINOIS Heathkil Kenner Central Hardware and Elect. Manhattan Franciscan Hobbies. San Fraxisco Toy Craft Norfolb HSIQ Model RR and Hobby Aurora Ron's Hobbies, lake Charles H Heck! and Son. toe. While Plains ZepJyn Miniatures Norfolk Fredericksen Hardware. San Francisco Westchester Hobbies. White Plains West Side Hobby. Belleville MARYLAND Hobby Cralt Center. Virginia Beach The Hobby Company ol San Francisco, San Francisco Jansky Ace Hardware, Berwyn City Wide. Baltimore NORTH CAROLINA Sears Roebuck. Virginia Beach Trains - nothing but - Trains. San Mateo Duke's Ace Hardware Burbank The Hobby Horse. Easton Havelxk Hobby. Havelock Toy and Model. Santa Rosa Heatbkrt. Chicago WASHINGTON Booiger Brothers. Santa Monica Suburban Sport. Laurel Hayes Hobby House Fayetteville Model Craft ltd, Chicago Ernst Home Center. All locations Massie’s Hobby House. Temple City Crystal lake Hobbies. Crystal lake Uncle Harold's Key and Cycle, lx. Bellem WeimanReeds lumber City. Valexia MASSACHUSETTS NORTH DAKOTA Erich Fuchs Inc. Boston World ot Toys. Bellevue Ernie's Toyland Inc. Yuba City Hobby Comer. Decatur Gagers Tiiarco. Fargo Brooks Drugs. Oixon Lacey Hobby, Olympia COLORADO Hobbycralt, Oowners Grove MICHIGAN OHIO Hobby Hut. Renton Hobby Center. Ann Arbor Academy Hobby. Colorado Springs Schuham Hardware, Glen Ellyn Hobby Center. Chapel Hill Mall Akron North End Hobby, Seattle Hobby Center. Dearborn Ru Ian Party and Hobby Store. Colorado Springs Swanson Craft and Hobby. Hanovex Park Hobby Center. Summit Mall Akron Hobby Towp Tacoma toe's Hobby Centers. Dearborn Caboose Hobbies. Denver Mainline Supply Co. Joliet Schrocks Hobby. Canton Stadium Toy and Craft. Tacoma Heathkil. Detroit Heathkil. Denver Barretts Ace Hardware, loliet Hobby Center. Canton Southgate Hobby, Tumwater Joe's Hobby Centers. East Detroit Oownlown Hobbies. Oenvei leisure Time Hobby Shop. East Moline Hobby Center. Cincinnati Handley Rock Hobby Supplies lx. Vancouver toe’s Hobby Centers. Farmington leisure Time. Oenvei The Viking Hobby Shop. Mundelien National Hobby Inc. Cleveland WEST VIRGINIA The Hobby Hub. Inc #2. lansing link and Pin Hobbies ft and K2. Denver Hav-A-Hobby. Palatine Hall's Hobbies, lx. Columbus Fountain Hobby Center, Charleston tommo. Livonia Production Machinery S Tools lx. Oenvei Al's Hobby and Craft Peoria Hobby Center. Dayton Hobbyland ol Huntington Huntington Tom Thumb Hobby Center, Denver Al's Hobby and Craft Peoria Trxkside Hobbies. Rochester Hobby Center. Elyria Nitro Hobby and Craft Nitro The Hobby Hul. Grand Junction Signal House. Peoria MINNESOTA Hobby Center. Findlay Wilson's Hobby Shop. Parkersburg Don's Hobbies. Greeley Wilson Hardware Quincy Gagers Tnarco. All locations Wings Hobby Shop lx. Lakewood Fulton's Hobby.Shop. Wheeling S. East Denver Hobby. Denver Walker Hobby Shoppe St Charles Dons Hobby Shop. Mankato Slater Hardwood. Lancaster WISCONSIN CONNECTICUT Waoconda Ace Hardware Waxonda Hobby Town. Minneapolis 1C Penney. Mentor Midvale Hobby Shop. Madison The Caboose. 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Dept CH 2850 29th Street. Long Beach. CA 90806 Aircraft o f Distinction CORSAIR The F4U in World War II By Barrett Tillman. This book, the third in Barrett Tillman's series o f operational histories o f important Second World War aircraft focuses on the Corsair as no other book has been able to. Drawing on extensive research that included interviews with former Navy. Marine Corps, and Army Air Corps pilots, squadron action reports, and war diaries, the author has been able to capture the complete life story o f this remarkable plane THE AMERICAN FLYING BOAT from its first test flight in 1940 through its victory over the Mitsubishi By Richard C. Knott Zero to Korean service and its final retirement in 1957. Foreword by Admiral Thomas H. Moorer, USN (Ret.). The many devotees o f this legendary aircraft are sure to find every Commander Knott has written the only comprehensive aviation page o f Corsair The F4V in World War II loaded with interesting history to focus exclusively on the American seaplane. This fully and authoritative facts. 19 79/2 3 5 pages/Illustrated/Appendices/ illustrated and carefully researched study includes complete data on Bibliography/tl 5.95 all o f the Navy’s flying boats since the world's first successful seaplane was built and flown by Glenn Curtiss in 1912. Many o f these planes HELLCAT The F6F in W orld W ar II have never before been discussed in such detail. By Barrett Tillman But this is more than a book about machines It is also about the This is a fast paced operational history o f the most important fighter men who devoted their imaginations and their flying skills to the aircraft employed in the Pacific by the US. Navy and Marine Corps development o f an innovative aircraft that contributed to the during World War II. successful completion o f the Navy's missions in two world wars, as Developed as an air superiority fighter to defeat the Japanese well as to the overall growth o f commercial aviation. From the Mitsubishi A6M Type Zero,'' the Hellcat's full combat role is detailed wooden Curtiss F Boat to Convair's supersonic Sea Dan and Manin's here for the first time. A wealth o f previously unpublished phtxos and four engine jet Seamaster. The American Flying Boat tells it all in a carefully researched information from squadron histories, combat narrative style that manages to convey a considerable quantity o f data action reports, and official documents make this a unique in a pleasant and easy-to read package 1979/240 pages/IUustrated/ contribution to the annals o f aircraft lore. 1979/22B pages/ Í2 9 9 5 Illustrated/Appendices/lndex/tl 595

Book Order Department. Naval Institute Press, Annapolis. Maryland I have enclosed my check or money order for $ ______, including 21402 $1.50 for postage Sc handling. (Please add 5% sales tax for delivery Yes. Please send me the following: within the State o f Maryland.) MZ ______copies o f American Flying Boat ($29.95 each) Name ______copies o f HeUcat The F6F in WW/I ($15.95 each) A d d re s s ______copies o f Corsair. The F4V in WWII & Korea ($15.95 each) City/State/Zip ______personally have built about 2 0 of these well enough to catch the attention of Pate, Steve Strombeck on Leonardo kits. Howard Rush was flying some foam Duke Fox, who later went over to Silva, Mike Guthomson on Mike Heard, models that looked very good and flew examine the motor. Generally speaking, Jim Gall on Mike Greb, Don Gutschar on just as well. However, John Jo of South­ Duke Fox has now captured the Combat William La Jack, and Marvin Denny on ern California beat Howard with a market, with about 80% of the contes­ Joe King. In round three the kills went VooDoo and an antique Fox 36X Combat tants using his motors. His motors won something like this; Steve Strombeck on Special. Open Fast, Open Slow, and Open FAI, Robert Autry, Ron Jaden on Jim Gall, Charlie Johnson of San Diego brought where the real competition is taking Mike Guthomson on Greg Hissem, and along some of Mike Hoffelt’s Mono­ place. There were still a number of Les Pardue on Marvin Denny. Mike boom FAI and AMA Fast Combat Super Tigres in use, but the number is Guthomson’s kill on John Jo was the models. There is no doubt in my mind dropping off every year. Mike Guthom- only one in the fourth round. Les Pardue that Mike is a super builder and that his son did, however, place second in Open put a kill on Ron Jaden to place fifth, and designs are super trick, but I feel there is Fast with this G21-35. Lots of pilots were George Cleveland put one on Mike too much time involved in building his using G15’s and X15’s in FAI Combat, Guthomson in the final. designs. During the lunch break for and still others were using the hard-to- Other highlights of the competition FAI Combat, Charlie was test flying the come-by Rossi 15's. I did not see any Cox were that Tom Fluker of Gainsville, FAI Monoboom. At that time he let Conquest 15’s in use. The Fox seems to Texas, won three first places in Slow, Sherwood Buckstaff try it out; he liked it run very well, but it requires lots of Fast, and FAI Combat all in the Senior but wanted totry it out when it had some nitro: 50 and 60% was being used by category. And, last but not least, 48-year- wingtip weight. I got a chance to fly it many of the fliers. Most of the FAI pilots old Marvin Denny of Wichita, Kansas, after Buckstaff. The outboard wing blew were using 7x4 props manufactured by finally won a National Championship off halfway through the flight. Prior to Rev-Up, Top Flite, or Taipan. In Fast after over thirty years of trying. Combat, the competitors still like the that it felt real good. The majority of TRIVIA models were of moderate size; that is, Top Flite 8-1/2x6-1/2 pylon racing prop or the wooden Rev-Ups of 8-1/2, 8-3/4, Duke Fox put on a flying demonstra­ below 400 square inches of wing area. tion with a model that was given to him William La Jack of Detroit had some trick and 9-inch diameters with 6-1/2 to 7- inch pitch. by Dick Imhoff. Duke was also around ieces of equipment that he made every day to watch the goings-on at the imself, such as a torque wrench for COMPETITION Combat circle. Debbie Imhoff pre­ engine head and backplate bolts, a The main event is Fast Open Combat. I sented Duke Fox with a ceramic fox that custom control handle, fuel pinch-offs, took some notes on who got kills in this she made herself in appreciation for all syringe, and a custom hex wrench. event; there were 18 altogether. Leonar­ the support Duke has lent to the Combat William is a metal model maker for do Silva of Mexico got one on David event. Debbie also had the Combat Fisher Body, of General Motors. Denny, Howard Rush got one on Steve pilots autograph one of her T-shirts; this There were two TWA engines in use Gardinier, Steve Strombeck on Sher­ stunt is becoming a tradition with her. In during Fast Combat, Joe Ambrose used wood Buckstaff, Robert Autry on Bob Texas, anything that is big is said to be one while Les Pardue was using the Burch, and George Cleveland on Tom "big as Dallas.” In Seattle, items that are other. Joe's was unimpressive, but the Shaw, all in the first round. The second rejects are called “ Sub Standard,” while one Lee had ran quite well; in fact, it ran round saw kills by Robert Autry on Riley in Texas these same items are "Kulls.” In

76 R/C MODEL BUILDER INDY R/C SALES, INC. R Ή t r 10620 N. College, Indianapolis, In. 46280 1-800-428-4682 c CALL TOLL FREE d □ n MRC Gars MRC Cans Think Indy fo r Save 35% Save 36%

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RA-1204 FMC XR311 GOOD THRU 12-25 79 RA 1207 Lamborghini INOYFLITE PANEL Combat Vehicle . 84.98 67.95 Cheetah...... 89.98 71.99 L i s t ...... 36.95 OREMELMOTO-SHOP NEW SUPERTIGRE PRICES SPECIAL...... 24.00 No. 572 - features an ac­ EFFECTIVE AUGUST 9,1979 cessory set of blades^ disc, OS 15 R/CW/M etc., and flexible shaft. X-11 R/Cw/m List...... 94.95 Plain Bearing . . . 37.95 28.50 OS ENGINES SPECIAL...... 60.98 List INDY X-11 R/Cw/m Save 40% OS 10 FSR Std. . 31.00 23.25 Ball Bearing .... 44.95 33.75 OS 10 FSR R/C . 38.00 28.50 X-21 Marine RVFRI OS 15 Std...... 35.00 26.25 ex. R/C...... 94.95 71.25 Send for INDY'S RA10Q3 Tyrrell P34 OS 15 R/C____ . 42.00 31.50 X-21 Car R/E OS 20 Std .... . 38.00 28.50 Six Wheeler .... 77.98 59.50 MARTINI PORSCHE w/Spcl. SG Shaft. 84.95 63.75 No.935 Turbo. . . 77.98 59.50 OS 20 R/C_____ . 46.00 34.50 X-21 Car R/E NEW OS 30 R/C____ . 53.00 39.75 W/VU28 Shaft.. . 84.95 63.75 OS 30 S td ____ . 48.00 36.00 ST 23 R/C w/m .. 53.95 40.50 X-25 R/C Sch. Ring CATALOG w/muffler...... 69.95 52.50

OARS $ 1 . 0 0 OEVCON 5 MINUTE EPOXY or FREE with order In economy 9 oz. size. RA1201 Porsche L i s t ...... 6.95 934 Turbo...... 74.98 57.00 SPECIAL...... 4.17

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Choppers .... Continued on page 27

TASKS Task “ A” : Rescue of people from the burning house. Time: 2 minutes. The model has a container hanging on the landing gear, attached with twine. The Mexico, Richard Stubblefield has been Curtis, Debbie Imhoff, Rhonda Rozzle, model is resting behind a starting line, given the nickname of “ El Esponjoso” ; I Neal Rose, Bob Burch, Paul Curtis, Bill engine running and is ready to fly; the will let you translate it for yourself. A Bieda, John Jo, Rand Rozzle, and Rich helper is waiting at the house. The quick verbal survey of Combat pilots von Lopez are all to be thanked for all starter calls "Time” and the pilot takes revealed that most were in favor of a the work they put in during the week. off and flies to the house. The helper double elimination system for at least Special thanks has to go to Marlin reaches up through the roof of the the first round in Fast and Slow Combat. McGee, who took on the thankless job house and attaches a pylon (represent­ Perhaps MACA should consider it for of being Combat Director. ing a person) to the container. The next year. Although Dirty Dan Ruther­ The Combat Team from Mexico was model then flies back behind the start ford was not present in Lincoln, some­ extending invitations to any American line and drops off the pylon. This pro­ one was running around impersonating Combat pilots to attend the Mexican cedure is repeated until the 2 -minute him. Who could that be? Is it true that Nats on November 16,17, and 18,1979, limit is over. If a pylon is being hooked some zealous modelers on the second in Mexico City. Contact Francisco Zu- up when the time runs out, the maneu­ floor of the Sandoz Hall dorms were loaga at No. 175 — 2 —Piso, Mexico 4, ver may be completed, but the overrun starting Combat motors and flying D.F. of time will be applied to the next task. helicopters in a dorm room? Nobody is 1979 NATIONALS COMBAT RESULTS One point is awarded for each pylon foolish enough to do that, right? On a SLOW COMBAT JUNIOR (person) transported back behind the more serious note. Combat circle help­ 1) Glenn Fultz, Cincinnati, OH ers Alan Bumbaugh, Gayle McGee, Judy 2) Gregory Strombeck, Rockford, IL start line. Continued on page 84

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CONTINENTAL UNITED STATES (EXCEPT ILLINOIS): ILLINOIS RESIDENTS ONLY: 800-637-7686 800-252-3336 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 THESE SPECIALS ARE GOOD UNTIL THE 15th OF THE MONTH OF THIS ISSUE, ONLY. ALL SPECIAL PRICES ARE SUBJECT TO CHANGE IF RETAIL PRICES CHANGE DURING SALE PERIOD. M ILLER No.2017 QUADRA 2 CU. IN. 29% TOP F LIT E 30% DREM EL OFF SPRAYJ5ET ENGINE OFF SEALING IRON MODEL 381 MOTO-TOO WITH FU LL ACCESSOR IE This sealing iron is great for covering with Monokote, Solar- The Model 381 is the ultimate in Complete set includes a precision Develops 2 horsepower! An engine film, etc. It features adjustable hand grinders. It features variable temperature, teflon shoe, and a built genuine piston type air com­ suitable for large models with its speed control, ball bearings, and pressor, 12 ft. air hose, 16G siphon scale-like sound and realistic per­ handy shape. Excellent quality. full accessories. type spray gun & 14G air brush both formance. Comes with a muffler, and R E T A IL NOW O N L Y $13.98 R E T A IL NOW O N LY$46.98 with open & fine spray nozzles. a mount. Very economical. $19.95 MBM313 $74.95 MBM153 RETAIL NOW ONLY $48.98 R E T A IL NOW O N LY $99.98 $81.95 MBM228 $139.95 MBM260 DEVCON GOLDBERG 40% K&B .40 RC ENGINE 40% 36% OFF DREMEL 572 FALCON 56 MK II OFF No. 8011 OFF 5 MINUTE ΜΟΤΟ SI- EPOXY IN TH E MOST ECONOMY POPULAR RC ENGINE EVER 9 OZ. SIZE MADEII

Now in squeeze Features a unique design for high bottles for your This deluxe saw features a complete This all time best seller is now re- designed with ailerons. 56" span. power; and a Irvine carburetor convenience. Limit accessory set of blades, discs, etc. Uses a .30 - 40 engine, all balsa for excellent throttle response and of 3 per order. and flexible shaft. construction. An excellent trainer. easy adjustment - from a slow R E T A IL NOW O N LY $4.48 R E T A IL NOW O N LY $62.98 R E T A IL NOW O N LY $28.78 smooth idle to a roaring top speed. $6.95 MBM151 $99.95 MBM154 $47.98 MBM020 R E T A IL NOW O N LY $43.48 $72.50 MBM200 LATRAX CORVETTE GOLDBERG 40% SULLIVAN ELECTRIC BOLINK W/RADIO W on a 1 s t & a S K Y LA R K 56 OFF STARTERS ELECTRIC CAR 2 n d In th e ROAR NATSI_j j A d d MK II 8 A A pen cell b a tte rie s the radio, charge the car for 15 minutes, & you're ready Extensively improved construction, Hi - torque, hi - rpm 12 v. starters. to raceI strength, and flight performance! These heavy duty, long life starters This 2 ch. 1/12 scale electric car THIS IS A FANTASTIC VALUE! 56” span. Requires a .30 -.40 size developop more torquetorqu and rpm's than comes already assembled with .05 any other starters! m otor, nicads. & charger. Goes over Comes with a powerful 2 ch. radio engine and a 4 ch. radio. This fun (w/wheel stick)k) already installed, 6 RETAIL______NOW O N LY $24.98 25 miles per hourl to fly balsa sport plane has pattern $38.95 MBM305 R E T A IL NOW O N LY $79.98 cell nicad batterytei pack, & a quick Dlx. model has V-groove In drive $99.95 MBM118 charger. 16” length.en Runs up to 30 capabilities. It makes a great low-wing trainer. cone for starter belt. Starts copters, Bolink kit for above car - must be mph!mph] Electronic speed control. airplanes, boats, and cars. assembled. BLX-1355. R E T A IL NOW O N LY $109.98 R E T A IL NOW O N LY $29.98 R E T A IL NOW O N LY $27.28 R E T A IL NOW O N LY $59.98 $159.95 MBM212 $49.95 MBM181 $41.95 MBM306 $79,95______Μ ΒΜ Π7 CRAFT-AIR 33% CRAFT-AIR 34% CRAFT-AIR 30% S & O BATTERY 33% FIELD BOX OFF HI - START OFF D R IFTER II OFF TESTER OFF H EAVY DUTY Features reel, tubing, towline, V-- parachute, stake, tow ring, and Q ' O BATTER* TESTER strong construct­ ] It's ready to use. not a kit. made ion. For sailplanes I of lightweight indestructible pol of 100” wingspan Would you believe? A competition Tests 8 cell transmitter and 4 cell re­ I yethelene. 22" long & holds and larger. sailplane for only $13.98! It isn't ceiver nicad packs under load. E x ­ everything. A SUPER BUY! just a trainer, it's a contest winner! tremely accurate scales. Detects bad R E T A IL NOW O N LY $19.98 RETAIL NOW O N LY $32.98 7154” span. Uses a 2 channel radio. cells and/or abnormal current drain. $29.95 MBM148 $49.95 MBM141 R E T A IL NOW O N LY $13.98 R E T A IL NOW O N LY $19.98 $19.95 MBM142 $29.95 MBM272 P.O. BOX 778 Q CHAMPAIGN, ILLINOIS 61820

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If you have a Tower order form, please use it. If not, then just use any When you place your order over the phone we will ship it to you C.O .D., and you pay for it when it's delivered to your door. When you phone in piece of paper or stationery. Write down all of the items that you want your order, please have the stock numbers written down ready to give to along with their special stock numbers and prices. Total them up (Illinois the order taker. residents add 5% sales tax) and add $2.50 for postage, handling, and full insurance, to obtain the grand total. Obtain a money order, certified check, Continental United States: Illinois Residents Only: bank check, or write a personal check for the grand total amount (personal checks may be delayed to allow for clearance). Foreign orders add $10.00 800 - 637 - 7686 800 - 252 - 3336 (excess will be refunded with order). Date of postmark determines special pericd eligibility. Send your order along with full payment to: TOWER The "800" WATS lines are open weekdays from 9:00 A.M. to 5:00 P.M., 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. Closed Friday evenings and Sunday.

STOCK NOW STOCK NOW NUMBER DESCRIPTION RETAIL ONLY NUMBER DESCRIPTION RETAIL ONLY

MBM417 Air Capital RTF FB-100 ...... $ 1 3 9 .9 5 $ 1 2 9 .9 8 M B M 1 71 F o x .3 6 R C ...... $ 3 9 .9 5 $ 2 5 .9 8 M B M 105 A irtro n ic s A q u ila ...... 7 4 .9 5 5 2 .4 8 M B M 1 77 F o x 1.2 C u b ic In c h T w i n ...... 2 5 0 .0 0 1 7 4 .9 8 MBM 106 Airtronics Olympic II ...... 4 9 .9 5 3 4 .9 8 M B M 1 7 5 Fox .60 RC Eagle ...... 6 9 .9 5 4 1 .9 8 M B M 1 0 7 A -J u s to -J ig W in g & Fuse J i g ...... 5 9 .9 5 4 1 .9 8 M B M 172 F o x .4 0 RC S c h n e u r le ...... 4 5 .9 5 2 8 .4 8 M B M 3 9 5 A n d re w s A e ro m a s te r T o o ...... 8 4 .9 5 5 1 .9 8 M B M 1 74 Fox .45 RC Schneurle B B ...... 6 4 .9 5 3 9 .9 8 MBM 112 Associated RC-200 Car K it ...... 1 9 5 .0 0 1 1 9 .9 8 M B M 3 9 2 Goldberg Falcon 56 MK II ...... 4 7 .9 5 2 8 .7 8 MBM411 Associated RC-300 Car Kit - NEWI1 . 1 9 0 .0 0 1 2 9 .9 8 M B M 181 Goldberg Skylark 56 MK I I ...... 4 9 .9 5 2 9 .9 8 MBM 1 13 Associated 6 Cell Car Kit No.3012 . . 1 0 2 .0 0 6 9 .9 8 M B M 182 Goldberg Skylane 6 2 ...... 6 4 .9 5 3 8 .9 8 MBM412 Associated 6-Cell Car-Asmb. No.3024 1 1 9 .5 0 8 2 .9 8 M B M 1 8 3 Goldberg Senior F alcon ...... 6 4 .9 5 3 8 .9 8 M B M 114 Badger 200-1 A ir B rush K i t ...... 3 2 .9 5 2 2 .9 8 M B M 184 G o ld b e rg H a n d i-T o te ...... 1 6 .9 5 1 1 .8 8 MBM 1 15 Badger 200-3 Deluxe K it ...... 4 2 .9 5 2 9 .9 8 M B M 4 0 3 Goldberg P6E Curtiss Hawk Bipe . . . 4 4 .9 5 2 9 .9 8 MBM 116 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 ...... 3 9 .8 7 2 8 .9 8 MBM 117 Bolink 6 Cell Car K it ...... 7 9 .9 5 5 9 .9 8 M B M 186 HB .15 RC B8 w /M u ffle r ...... 4 3 .2 3 3 1 .9 8 MBM 118 Bolink 6-Cell Electric Car K it ...... 9 9 .9 5 7 9 .9 8 M B M 187 HB .25 RC BB w /M u ffle r ...... 5 6 .0 0 4 0 .8 8 MBM 396 Bridi Deception ...... 8 9 .9 5 6 1 .1 8 M B M 188 H B .4 0 RC B B ...... 6 9 .4 4 4 9 .9 8 M B M 121 B rid i S u n F li 4 - 2 0 ...... 2 9 .9 5 2 0 .3 8 M B M 4 0 4 H B .4 0 RC BB PD P M a r in e ...... 9 3 .5 0 6 6 .9 8 MBM 123 Bridi RCM Trainer 4 0 ...... 5 4 .9 5 3 7 .3 8 M B M 1 8 9 HB .50 RC BB ...... 7 6 .2 7 5 4 .9 8 MBM 125 Bridi Dirty Birdy - wood ...... 5 9 .9 5 4 0 .7 8 MBM 1 9 0 HB .40 RC BB PDP ...... 8 4 .3 4 6 1 9 8 MBM 126 Bridi RCM Trainer 6 0 ...... 6 2 .9 5 4 2 .7 8 M B M 191 HB .61 RC BB PDP ...... 1 1 9 .2 6 8 7 .6 8 MBM 130 Bridi UFO - fiberglass ...... 1 2 9 .9 5 8 9 .9 8 MBM 4 3 0 Hi-Flight Mirage ...... 5 9 .9 5 4 1 .9 8 2 .9 8 M B M 1 32 C o v e rite B a lsa rite 8 o z ...... 3 .2 0 2 .3 8 M B M 1 9 2 Hobbypoxy Formula 2 Epoxy · 8 oz. 4 .2 5 2 .7 8 MBM 133 Coverite Glaskote % p t ...... 3 .2 0 2 .3 8 M B M 1 9 3 Hot S tuff Adhesive .5 oz ...... 3 .9 5 MBM 400 Cox Hydroblaster w/.049 & Radio . . 1 1 0 .9 5 7 4 .9 8 M B M 194 House of Balsa P-51D (.29 to .40) . . 6 4 .9 5 3 9 .9 8 2l i MBM 137 Cox RTF Cub w/Engine & Radio . . . 9 9 .9 5 6 9 .9 8 M B M 3 8 9 House of Balsa .40 P-51D - glass. . . . 1 0 9 .9 5 7 9 .9 8 5 5 .9 8 MBM 138 Cox RTF Cessna Centurion ...... 6 9 .9 5 4 8 .9 8 MBM 1 9 7 Jemco F4U-1 A Corsair...... : . . . 7 9 .9 5 3 2 .4 8 MBM418 Cox RTF Piper Arrow ...... 7 4 .9 5 5 2 .4 8 M B M 4 2 4 K & B .1 9 R C ...... 5 0 .0 0 6 9 .9 8 MBM 139 Cox RTF Sportavia Trainer ...... 8 9 .9 5 6 2 .9 8 M B M 2 0 5 K&B .21 O utboard ...... 1 0 7 .0 0 4 9 .9 8 M B M 1 3 4 C ox Tee Dee 0 4 9 E n g in e ...... 2 4 .9 5 1 4 .9 8 M B M 4 0 6 K&B .21 RC Schneurle w/M uffler . . 7 2 .5 0 4 6 .9 8 M B M 1 3 5 C o x Tee Dee 09 E n g in e ...... 2 6 .9 5 18.88 MBM 2 0 0 K & B .4 0 RC E n g in e ...... 7 2 .5 0 6 7 .9 8 MBM387 Cox Tee Dee .051 Engine ...... 2 4 .9 5 1 6.9 8 MBM 2 OI K&B .40 RC Pressurized ...... 1 0 5 .0 0 4 9 .4 8 MBM427 Cox Tradewinds Sailboat ...... 1 6 9 .9 5 8 4 .9 8 M B M 2 0 7 K&B .40 RC Sport Marine ...... 8 2 .5 0 5 7 .8 8 MBM 146 Craft-Air Butterfly II ...... 4 9 .9 5 3 2 .4 8 M B M 2 0 3 K & B .61 RC w / M u f f le r ...... 9 6 .5 0 7 4 .9 8 MBM 142 Craft-Air Drifter I I ...... 1 9 .9 5 1 3 .9 8 M B M 2 04 K&B.61 RC w/M uffler & Pump . . . 1 2 5 .0 0 MBM 141 Craft-Air H.D. Hi-Start...... 4 9 .9 5 3 2 .9 8 MBM 4 3 8 K&B .40 RC RE Schneurle w /M uff. . 1 1 0 .0 0 6 9 .9 8 7 4 .9 8 M B M 148 C r a ft- A ir F ie ld B o x ...... • 2 9 .9 5 1 9 .9 8 MBM 4 1 9 Kraft RTF Electric Cardinal ...... 9 9 .9 5 5 9 .9 8 MBM 423 Craft-Air Piece O' Cake ...... 2 4 .9 5 1 7 .4 8 MBM 4 2 O Kraft Electric M otorcycle ...... 7 9 .9 5 1 7 .9 8 MBM409 Craft-Air Upstart (3/16 inch) ...... 1 7 .9 5 1 2.5 8 M B M 2 0 8 L&L On-Board Ignition System. , . . 2 3 .9 5 4 6 .9 8 MBM 145 Craft-Air Viking MK I Sailplane. . . . 7 9 .9 5 4 9 .9 8 MBM 2 1 0 Lanier Caprice ...... 7 4 .9 5 4 0 .9 8 MBM 149 DAE Series IV Power Panel...... 3 8 .9 5 2 4 .9 8 M B M 4 0 7 Lanier Comet I I ...... 6 4 .9 5 1 6 3 .9 8 MBM 151 Devcon 5 min. Epoxy-9 oz ...... 6 .9 5 4 .4 8 M B M 2 1 3 Leisure 1/8 Dune Buggy ...... 1 9 9 .9 5 MBM 416 Dremel No.730 Disc-Belt Sander . . . 8 9 .9 5 5 9 .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 3 3 .9 8 MBM 152 Dremel 210 Drill Press ...... 2 3 .9 5 1 7 .9 8 M B M 2 1 5 Mark's Models Bushwacker w/Acces 5 2 .9 5 1 4 .3 8 MBM 1I 5 3 D rem e l 381 M o to T o o l K i t ...... 7 4 .9 5 4 6 .9 8 MBM 2 1 4 Mark’s Models Wanderer 7 2 " ...... 2 3 .9 5 2 2 .9 8 ΜΒΜΊ54 Dremel 572 Deluxe Moto-Shop . . . . 9 9 .9 5 6 2 .9 8 M B M 2 1 7 M E N T ra in e r . 1 5 - 2 5 ...... 3 1 .9 5 2 9 .9 8 M8MI155 Dremel 580 Table Saw ...... 9 9 .9 5 6 2 .9 8 MBM 2 I 8 Microflame 4400 Dlx. Welding K it . . 3 9 .9 5 3 4 .2 8 MBMI156 Dubro Lg. Nylon Hinges (15) ...... 2 .4 9 1 .88 MBM 2 2 O Midwest RK-40 Axiflo Fan Kit . . . . 4 9 .9 5 2 1 .9 8 M B M I1 5 7 D u b ro F le x C able 2 0 " ...... 1.49 1.18 MBM 2 2 I Midwest Little S tik ...... 3 3 .9 5 2 1 3 8 MBMI158 Dubro Kwik Fill Fuel Pump ...... 1 0 .9 8 6 .9 8 M B M 2 2 2 M id w e s t C a rd in a l A R F ...... 3 2 .9 5 2 1 .9 8 MBMI159 Dubro No. 203 Kwik-Switch Mount . 1 .7 5 1 .38 M B M 2 2 3 Midwest Super C hipm unk ...... 3 3 .9 5 2 5 .7 8 MBM 1I 6 O Dubro Kwik-Hinge Slotter ...... 1 .95 1.58 M B M 2 2 4 Midwest Sweet S tik ...... 4 2 .9 5 2 8 .9 8 M B M I1 6 3 D um as A tla s V a n L in e s U - 1 ...... 5 2 .5 0 3 3 .9 8 M B M 2 2 6 Midwest Attacker ...... 4 4 .9 5 4 8 .9 8 M B M I1 6 2 D um as Big S w a m p B u g g y ...... 3 7 .0 0 2 3 .9 8 M B M 2 2 8 Miller No.2017 Spray S e t ...... 8 1 .9 5 2 9 .9 8 MBMI164 Dumas Competition DV60 - glass . . . 1 0 5 .0 0 6 6 .9 8 M B M 4 1 0 Monogram RC Electric Leopard Tank 4 9 .9 5 5 .3 8 MBMI401 Dumas Dauntless ...... 7 5 .0 0 4 7 .9 8 Monokote Reg. and Trans. Colors. . . 9 .0 0 6 .2 8 M8MI165 Dumas Hot Shot 24" Tunnelhull . . . 3 3 .5 0 2 1 .7 8 Monokote Metallic C olors ...... 1 0 .5 0 4 4 9 .9 5 2 7 7 .4 8 MBM 1166 Dumas Hot Shot 21" - glass ...... 7 2 .5 0 4 6 .9 8 M B M 2 3 0 MRC RTF Cessna w/Enya .35 RC . . 4 9 9 .9 5 3 1 4 .9 8 M B M I4 2 9 D um as S ail C o n tro l U n i t ...... 5 5 .0 0 3 9 .9 8 M B M 231 MRC RTF Cherokee w/Enya .40 RC . 9 9 .9 5 7 4 .9 8 MBMI167 Edson Adjustable Motor Mount. . . . 6 .9 5 5 .5 8 M B M 2 2 9 MRC RTF Hawk Trainer w/Enya .15. 8 9 .9 8 5 4 .9 8 E n ya E n g in e s ...... Call For Low Prices M B M 4 4 1 MRC Lamborghini Cheetah ...... 1 9 9 .9 8 1 3 9 .9 8 MBM 1168 Fox . 15 RC Schneurle ...... 3 7 .9 5 2 2 .7 8 M B M 2 3 7 MRC 1/12 Scale Leopard Tank . . . . 7 7 .9 8 4 5 .9 8 MBMI169 Fox .19 RC Engine ...... 3 6 .9 5 2 2 .9 8 M B M 4 4 2 MRC Lamborghini Countach LP500S 6 8 .9 8 4 2 .9 8 M B M I1 7 0 F o x .2 5 RC E n g in e ...... 3 6 .9 5 2 2 .9 8 M B M 4 4 3 MRC M artini Porsche 936 Turbo . . . 1 6 9 .9 5 1 0 9 .9 8 MBMI338 Fox .35 U/C ...... 2 6 .9 5 1 7.9 8 M B M 4 2 1 Bud Nosen P-51 ...... 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. ALL SPECIAL PRICES ARE SUBJECT TO CHANGE IF RETAIL PRICES CHANGE DURING SALE PERIOD.

STOCK NOW NUMBER DESCRIPTION RETAIL ONLY

M B M 2 3 8 Ohio Superstar Softglas - Q t ...... $ 9 .9 5 $ 7 .9 8 M B M 2 3 9 OPS .40 RC Marine w/Tuned Pipe . . 1 5 5 .0 0 1 1 9 .9 8 fix a te NOW STOCK M B M 4 4 4 Bud Nosen Big S tic k ...... 1 2 9 .9 5 9 7 .4 8 MODEL ONLY NUMBER M B M 241 OPS .60 RC Big Red w /Pipe ...... 1 8 8 .0 0 1 3 9 .9 8 M B M 2 4 0 OPS .65 RC Marine w/Tuned Pipe . . 2 3 0 .0 0 1 6 9 .9 8 M B M 2 4 2 Orline Fokker D V II ...... 9 7 .5 0 7 4 .9 8 TOWER HOBBIES ''TOWER HOBBIES TOWER HOBBIES M B M 4 2 8 Orline Sopwith Pup - NEW !!...... 1 1 9 .5 0 8 9 .9 8 MBM397 M B M 2 4 8 Pacer X 30 Adhesive .36 o z ...... 3 .5 0 2 .2 8 6 Channel w/2 KPS-14II Servos...... $149.95 M B M 2 4 9 Pacer Zap Giant .36 o z ...... 3 .5 0 2 .2 8 6 Channel w/3 KPS-14II Servos...... 174.95 MBM398 M B M 251 Pica Cessna 1 8 2 ...... 9 9 .9 5 6 6 .9 8 6 Channel w/4 KPS-14II Servos...... 199.95 MBM339 M B M 2 5 3 P ica T - 2 8 B ...... 8 9 .9 5 5 9 .9 8 M B M 2 5 5 Pica W a c o ...... 8 9 .9 5 5 9 .9 8 6 Channel w/4 KPS-15II Servos...... 209.95 MBM340 M B M 2 5 6 Pica Duelist 2 /4 0 ...... 8 9 .9 5 5 9 .9 8 Tower KPS-14II Servo...... 25.00 MBM399 M B M 2 5 9 Power Pacer 9.6 v. Model 3 00 ...... 5 9 .9 5 4 6 .9 8 THIS SALE IS NOT RETROACTIVE M B M 2 6 0 Quadra 2 Cu. In. Aircraft Engine . . . 1 3 9 .9 5 9 9 .9 8 NOW STOCK M B M 2 6 2 R o b e rt In c id e n c e M e t e r ...... 1 5 .9 5 1 0 .9 8 M B M 2 6 3 Robert Super Pumper Mark II ...... 1 7 .9 5 1 1.9 8 MODEL RETAIL ONLY NUMBER M B M 2 6 4 Robert Auto M ix ...... 9 .9 5 7 .4 8 KRAFT KRAFT KRAFT KRAFT KRAFT KRAFT M B M 2 6 5 R h o m 2 G e a r-M ain s...... 8 7 .0 0 5 6 .5 8 M B M 2 6 6 Rhom 3 Gear-Firewall...... 1 2 5 .0 0 7 9 .9 8 K P-2 AW (Wheel) w/14IIA's. . . $139.95 $94.98 MBM344 M B M 2 6 7 Rhom 3 Gear-Flat M o un t ...... 1 2 5 .0 0 7 9 .9 8 K P-2 AW (Wheel) w/15IIA's. . . 145.95 98.98 MBM345 M B M 2 6 8 Royal Photocell Tachom eter ...... 3 9 .9 5 3 3 .9 8 MBM346 M B M 2 7 2 S&O Battery Tester...... 2 9 .9 5 19.98 KP-2A (2 Stick) w/14IIA's . . . 139.95 94.98 MF.M 2 7 4 Sealector Custom Model Iro n ...... 2 8 .3 5 1 8.98 KP-2A (2 Stick) w/15IIA's . . . 145.95 98.98 MBM347 Μ BM 4 1 5 Sig Beechcraft Bonanza NEW!! . . . 7 7 .5 0 5 4 .9 8 KP-2AS (1 Stick) w/14IIA's . . 139.95 94.98 MBM348 M B M 2 7 5 Sig Piper J-3 C u b ...... 4 9 .9 5 3 5 .9 8 M B M 2 7 6 Sig Kadet Trainer ...... 4 3 .9 5 3 1 .6 8 KP-2AS (1 Stick) w/15IIA's . . 145.95 98.98 MBM349 M B M 2 7 9 S ig K a v a lie r ...... 4 9 .9 5 3 5 .9 8 KP-3AS w/KPS-1411 A ' s ...... 149.95 99.98 MBM433 M B M 2 77 S ig K o u g a r ...... 5 2 .5 0 3 7 .7 8 M B M 2 7 8 S ig S m ith M in ip la n e ...... 5 9 .9 5 4 2 .9 8 KP-3AS w/KPS-15IIA’s ...... 155.95 104.98 MBM434 M B M 2 8 2 Skyglas Phoenix 5 ...... 5 5 .0 0 3 6 .9 8 KP-4A w/KPS-14IIA's...... 309.95 196.98 MBM350 M B M 2 8 5 Slimline Std. M uffler for K&B .35 -.40 9 .9 5 5 .9 8 Solarfilm Reg. Colors ...... 7 .9 8 4 .4 8 KP-4A w/KPS-15IIA's...... 321.95 204.98 MBM351 M B M 3 0 4 Sonictronics N o.1250 12 v. Fuel Pump 1 5 .9 5 1 1.9 8 KP-6A w/KPS-1411 A 's ...... 339.95 216.98 MBM352 M B M 431 Spickler Quickie 500 ...... 4 3 .9 5 3 2 .9 8 MBM353 M B M 212 Latrax Corvette w/Radio ...... 1 5 9 .9 5 1 0 9 .9 8 KP-6A w/KPS-15IIA's...... 351.95 224.98 M B M 2 9 0 Stafford B-24D Liberator ...... 1 9 9 .9 5 1 3 9 .9 8 KP-5C w/14ll's or 15ll's...... 389.95 259.98 MBM354 M B M 291 Stafford Twin Comanche balsa . . . 1 4 9 .9 5 1 0 4 .9 8 KP-5CS w/14ll's or 15ll's_____ 389.95 274.98 MBM355 M B M 2 9 3 Sterling Puddle Jumper...... 1 7.9 5 1 2 .5 8 M B M 2 9 4 S te rlin g P u d d le J u m p e r M K I I ...... 4 1 .9 5 2 9 .3 8 KP-7C w/14ll's or 15ll's...... 529.95 377.98 MBM356 M B M 2 9 5 Sterling Fledgling ...... 4 1 .9 5 2 6 .4 8 KP-7CS w/14ll's or 15ll's_____ 529.95 377.98 MBM357 M B M 2 9 6 S te rlin g 'ΛΑ C o rs a ir...... 3 1 .9 5 2 0 .9 8 M B M 3 0 5 Sullivan Electric S ta rte r ...... 3 8 .9 5 2 4 .9 8 KPS-14II Servo...... 44.95 32.98 MBM358 M B M 3 0 6 Sullivan Deluxe Starter ...... 4 1 .9 5 2 7 .2 8 KPS-15II Servo...... 44.95 32.98 MBM359 h M B M 3 0 7 Sureflite Skylane 182 ...... 3 9 .9 5 2 5 .9 8 MBM360 M B M 3 0 8 Sureflite All Foam J-3 C u b ...... 3 9 .9 5 2 5 .9 8 KPS-18 Servo (Super Mini) . . . 54.95 43.98 M B M 3 0 9 S u re flite Z»A J-3 fo a m ...... 2 9 .9 5 1 9 .4 8 KPS-14IIA Servo...... 39.95 27.98 MBM361 M B M 3 1 0 S u re flite S p itfir e · f o a m ...... 3 9 .9 5 2 5 .9 8 KPS-15IIA Servo...... 42.95 29.98 MBM362 M B M 3 9 0 L.R Taylor Multi-Charger...... 2 4 .9 5 1 9 .9 8 M B M 4 0 8 L.R. Taylor Super Power Panel .... 8 9 .9 5 6 9 .9 8 KPS-20 Ball Bearing Water M B M 4 2 5 T o p F lite C o n te n d e r 4 0 ...... 4 9 .9 5 3 2 .9 8 Resistant Servo...... 49.95 38.98 MBM435 M B M 3 1 6 T o p F lite C o n te n d e r 6 0 ...... 5 6 .9 5 3 6 .9 8 M B M 3 2 0 Top Flite F4U-1 A Corsair ...... 9 9 .9 5 5 9 .9 8 FUTABA FUTABA FUTABA FUTABA M B M 3 1 5 Top Flite Freshman Trainer ...... 4 7 .9 5 3 0 .9 8 FP-2GS...... 109.95 72.98 MBM363 IP! M B M 3 1 4 Top Flite Heat Gun ...... 2 9 .9 5 1 9 .9 8 MBM364 M B M 3 1 7 Top Flite P-51D M ustang ...... 7 4 .9 5 4 8 .6 8 FP-2F w/S-7's...... 149.95 98.98 M B M 3 1 3 Top Flite Sealing Iro n ...... 1 9 .9 5 1 3 .9 8 FP-2F w/S-18's or S-22's...... 134.95 89.98 MBM365 M B M 4 1 3 Top Flite Trim Seal Tool...... 1 4 .9 5 1 0.98 FP-2E w/S-7's...... 149.95 98.98 MBM366 M B M 311 Top Flite 10x6 (6) Super Maple. . . . 8 .1 0 5 .6 8 M B M 3 1 2 Top Flite 11x7 (6) Super Maple. . . . 9 .3 0 6 .4 8 FP-2E w/S-22's...... 134.95 89.98 MBM367 M B M 321 Tower RC Long Plugs - 6 Plugs .... 8 .9 4 4 .6 8 FP-3S w/S-18's...... 144.98 94.98 MBM368 M B M 3 2 2 Tower 12 v. Starter Battery - wet. . . 2 5 .9 5 1 2 .9 8 MBM369 M B M 3 2 3 AFI 12 v. Battery Charqer...... 8 .9 5 6 .9 8 FP-3S w/S-20's...... 169.95 109.98 M B M 3 2 5 Tower Rubber Bands Vi Lb. No. 64. . 1 .5 0 .9 8 FP-3FN w/S-18's or S-22's . . . 219.95 139.98 MBM383 M B M 4 4 5 V K S o p w ith C a m e l...... 7 4 .9 5 5 2 .4 8 MBM370 M B M 4 3 9 Webra.61 RC Schneurle (Speed) . . . 2 2 9 .8 0 1 1 9 .9 8 FP-4FN w/S-18's...... 289.95 179.98 M B M 4 4 0 Webra .91 RC Schneurle ...... 2 6 8 .3 5 1 4 4 .9 8 FP-4FN w/S-16's...... 319.95 199.98 MBM371 M B M 3 3 1 Wing Mfg. The Love M achine ...... 6 9 .9 5 3 4 .9 8 FP-5FN w/S-18's...... 319.95 204.98 MBM372 M B M 3 3 4 X-Acto No. 5087 Knife & Tool Chest 2 9 .9 5 2 0 .9 8 MBM373 M B M 3 3 6 Zinger Props 9x6 6 e a c h ...... 7 .8 0 5 .4 8 FP-5FN w/S-16's...... 359.95 222.98 M B M 3 3 7 Zinger Props 10x6 6 e a c h ...... 8 .4 0 5 .8 8 FP-6FN w/S-18's...... 339.95 209.98 MBM374 M B M 3 3 8 Zinger Props 11x7 6 e a c h ...... 9 .6 0 6 .6 8 FP-6FN w/S-16's...... 369.95 234.98 MBM375 S-7 Servo...... 39.95 29.98 MBM379 S-16 Servo...... 39.95 29.98 MBM378 Remember, these are only a few of the several thousand different I MBM377 items that Tower Hobbies stocks. If you need an item that does S-18 Servo...... 29.95 22.48 S-20 Servo (M in i)...... 39.95 29.98 MBM437 not appear in this issue, give us a call to see if we have it. The I chances are good that we do. By all means compare our prices SANWA SANWA SANWA SANWA SANWA I before you buy elsewhere; you'll be dollars ahead. No.8020 2 Channel...... 99.95 69.98 MBM380 ______Task “ B” : Transporting water to put FINAL APPROACH Hobby Ho out the fire. Time: 2 minutes. The model Perhaps the above will spark your at hobby tptctaUia flies to a water basin (children’s play imagination in thinking up different OLD TIMER KITS (Full and Portia] kits): pool), lowers the container into the stunts which can be adapted to this type Micro Models . 020 Replica Kits »940 Soil Plane (C om et). 36" Span $11.95 water, fills it, and then transports it to the of fun fly. Already, I can envision a 1941 Playboy Sr. (Cleveland). 38" Span $9.95 house. The container has a 3/16-inch model equipped with a balloon filled Micro Models--Kit for . 10-. 15 engines: 1940 "Panther" (Peerless). 46" Span $27.95 hole in the bottom and the helper (in the with water and a servo-driven needle to Cal-Aero Model -Kits for . 10-. 15 engines. 50" Span house) is catching the water in a pan. If pop it over a small fire on the ground. Or 1941 Air Trails Sportster. $36.95 (SPECIAL...... $27.71! 1938 Power House (Tabi). $34.95 [SPEClAL***«* *Í26.2i; desired, the pilot may overturn the how about some war games, with the P I It Semi-KlI* (Rib and Former Partials): 1938 Pow er House (Tabi/M A N ). 84" Span $13.20 container on the roof. (The roof consists ever-popular bomb drop (flour sack) on (Stick Kit for Power House (by TabiJ. $15.95) of a wire mesh to protect the helper, but the target? The ideas are endless. If you 1936 Dallairo S p o rts te r. 102" Span $15.95 (Stick Kit for Dallaire [by Tabi). $24.18) has large enough openings for him to dream up any new ideas, drop me a line 1937 Buccaneer (Berkley). 84" Span $13.20 work the pylons and pan through it.) c/o R/C Model Builder and I’ll see that (Stick Kit for Buccaneer (by Hobby Horn]. $25.95) 1941 Playboy Jr. (Cleveland). 54" Span $8.80 This procedure continues until the time they get published. Many thanks to 1941 Playboy Sr. (Cleveland). 80" Span $13.20 is up. The helper then takes the pan in 1936 Miss America (Scientific), 84" Span $16.50 Chris Blum of Kavan, Santa Ana, for her 1938 M ercury (S c ie n tific ), 72" Span $14.85 which he collects the water to a score- help in translating the “ party” data from [All o th er P k W Semi-Kits are available) SCALED OLD TIMER PLANS: keeper, who measures the amount of Dieter’s German text. Until next month 1936 Dallaire Sportster, 15* Span. 40082" $12.00 water collected during that task. If the . . . BCNU. 1938 Power H ouse. 14’ S p an . 4325^" $14.00 OLD TIMER ACCESSORIES: time runs over the 2 minutes, it is applied BK §124 (? " ) Red R ubber B ands U l b .) $1.35 against the next task. One point is Austin Craft Ignition Timers: SM. Med. Lg. $3.25 Trcxler A>r Wheels: 2 3/4". $4.50/pr.; 3". $4.50/pr.. awarded for each fluid ounce of water ’ /2", $6. 30/pr.. 4 1/2". $7.20/pr. Air Pump. $3.15 collected. 1 to 1 ...... Continued from page 14 CQ2 ENGINES AND KITS: Brown COj Engines: Single Cyl. . $29.95. Twin. $39.95 Task “ C” : Clearing away the debris. (Soda Cartridge Chargor extra. $9.95; Cartridges. 1978. It is a certainty that either the Scale Box of 10. $2.85. Ansul adaptor for Ansul CO2 fire Time: 2 minutes. The model is behind extinguisher cartridges. $18.95. Parts available) the start line, ready to go. When the Contest Board or AMA in general will Baby Ace Kit (by Peck - Polymers) . 17[" Span $4.46 have to speak to this concern in the near One Nite 16 (by Peck - Polymers). 16" Span $3.56 starter calls “ time,” the helper (who is ELECTRICS- SYSTEMS AND KITS: behind the start line also) picks up a future. Astro 05 fully wired system. $54.95 [SPECIAL·· $38.47] Astro Flight Rapid Charger. $29.95 [SPECIAL·· $20.97] tennis ball, runs to the table and places The R/C portion of scale brought Electrn Lite Kit (by Mid Nite Models). 93" Span. the ball inside a ring which is attached to forth some six Precision Scale entries Competition electric glider. $59.95 [SPECIAL·· $39.96] and about forty Sport Scale. The judging ENGINES: the table top. He then runs back to the Cox Tee Dee .020 $21.21 Send $1.00 for our start line for another ball. At this time, in Precision was very tight, with the O .S . Max . 15 R /C $35.70 latest catalogue, (a range running form 360 for Ralph lack- Fox .36 R/C $33.96 copy will be sent the model takes off, flies to the table and free.upon request, pushes the ball off the table, then flies son’s Comanche to 394.4 for Steve Shipping charges: with an order. Sauger’s Lockheed Orion. Please re­ Up to $15.00 add $1.50 back to the start line. The helper runs to $15.01 to $40.00 add $2.00 Hobby Horn the table again and places another ball in member that in Precision Scale, the $40.01 to $60.00 add $2.50 ••hobby specialties*· Over $60.00 add $3.00 P .O . Box 3004 the ring. This is repeated until the time is flight score of 450 maximum points is (Calif, addressees add 6t Seal Beach. Ca 90740 accumulated by adding the three flight for State sules tax.) (714) 894-6223 up. One point is awarded for each ball pushed off the table. judges’ scores together. Therefore, when the contestant, for instance, * *********************************** * misses the spot after landing scores of, * ^ let’s say, 8 , he has blown 24 points. * ^ Therefore, the 34-point spread in static * made it certain that the winner would * come from the flight line. Bob Wischer’s * 1 * ÄIS IE - PROPELLORS Piel Beryl posted the highest flight score * ?30I8 S NOftMAN&E AVI TORRANCE. CA 9 0 » ? PHONL E 1» 5 » J 3 I3 * and garnered first place on the U.S. team * * for Canada in ’80 with a total of 761.4. * * George Rose with his P6 E followed with * * a 740.2, and Bob Underwood was third * with 733.6. The alternate is Earl Thomp- + CUSTOMIZED * son with his Focke-Wulf, just .2 of a point * * behind Underwood's Hiperbipeat733.4. * * The importance of just one maneuver is * * shown by the fact that had Underwood’s * * 3 and 4 BLADED * landing on Saturday night been in the * Size 18",- 20" and 22" Dia. in 6",-8" and 10" pitch * spot, he would have just missed first ♦ These props are made to fit inside our 6" Dia. * place by . 8 of a point. * spinner. * Some persons in attendance during * Price $ 40.00 each. (Spinner not included) * the earlier part of the week when the * * Precision Scale models were judged by * Size 24“ ,- 26" and 28" Dia. in 6” .- 8" and 10" pitch * the panel of LeRoy Weber, Bill Knepp, 4 These props are made to fit our 6%" Dia. spinner, * and Bob Karlsson, were confused to see * j $ 48.00 each. (Spinner not included) *· Bob Wischer’s model back on the block * ♦ * a second time for judging. It had been * * agreed upon before the start that the * * model judged first would be rejudged at » * the conclusion to determine the validity * Ind ivid ual * of the first judging. So oftem an unreal * * pattern is set at the first model, either * B lad es *- too high or too low, which presents a * * penalty to that model or leaves the * Replaceable * judges nowhere to go. If * Before the flying, two interesting * Price 4 - experiences occurred. Monty and Patty * i Extra blades - S 6.00 to S 10.00 each 4 Groves, returning from Oshkosh and if * the EAA Fly-In, stopped over in Lincoln * * PAT. PEND. 4 . on their way back to California. They *****★ *******★ ★ ********★ **·*■** + + + *■·*■·* + * were flying the Focke-Wulf in Swedish 84 R/C MODEL BUILDER Here’s whaťs new Finish and from Top Flite! Trim Products A L L NEW TRIM SEA L TOOL Now, you can stripe, seal and cover with ease, even in areas too small for a Top Flite sealing iron. ® Two specially designed tips T O P F L U E 'S (one for fillets and curves, another for flat surfaces, hard to reach corners and pin striping) Finishing • High and low heat settings for Hot Stripe, Super MonoKote and EconoKote Touch! ® The finishing trim touch $14.95 • Doesn’t collect dirt and oil on edges Top Flite's amazing new iron-on HOT STRIPE is the answer to all your airplane, boat and car striping needs. Step 1 Step 2 Step 3 Super thin and flexible enough Pin Striping In Tight Spots Fillets for intricate patterns and circular designs, with its easy, low heat iron-on application, NEW COLORS IN: HOT STRIPE is ideal for canopies, foam, and plastic • Super MonoKote parts. In a unique material Ideal for covering all types of models without the usual tedious work and mess of sealing, doping, saving dispenser, HOT sanding and polishing. STRIPE comes in large • Cream · Metallic Aztec Gold 40-foot rolls, 6 colors • Maroon · Metallic Copper Red and 4 widths. Plus our new Day-Glo Fluorescent Trim Sheets for high visibility. EconoKote Perfect for use on foam, compound curves, solid areas and strong structures, this economical low heat covering is also ideal for trim. • Midnight Black ANEW REPLACEMENT SHOE for your sealing iron is the economical answer to upgrading your worn out or damaged shoe for flaw-free finishes.

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AUGUST I979 87 of the Scale Judging Guide can be r accomplished. It is a difficult task at best, HAVE WE GOT but the effort is beginning to bear fruit. The presence of this effort can be A SYSTEM FOR YOU! noted by the fact that one contestant protested the amount of downgrading Pro Line has a radio control received by him for what the judges felt system to meet your needs in the was "un-scale” flying. The factors in­ air, on the ground, and in the water. volved would appear to be model speed If you are starting out and scale maneuver quality. These and want something better, factors are obviously judgment con­ look at the Pro Line CADET series. cerns and we do not have the space nor If you're the sporting or the facts to debate the issue now, but I know that while some may be quiet competition type, ask to see S 3 because they were downgraded, others Pro Line's "middle of the line” support the concept of more care being COMPETITION series. And if you I • ϋ given to judging the "scale-like” quality need the extra features to win that of flight. important contest, the Pro Line After a thorough briefing by Dale CUSTOM COMPETITION series Arvin, the scale R/C flying commenced. is for you. One concession which had to be made When it comes to quality, to fit the site was the positioning of the figure 8 . Since there was only about 600 you can’t beat Pro Line. feet of space from the flight line across Watch for the new Pro Line to the "no man's land” of actual airport 3-channel system. operation, the FAI 8 was used. Actually, It's coming! it would appear that most fellows prefer it, since it is easier to fly and judge. All systems available with (Anybody ever think about submitting a rules proposal?) Even at that, it was single or dual stick. difficult for some to keep within bounds. This was true of models such as the ducted fans belonging to Bob Violett Pro Line Electronics Inc. and Tom Cook, which really move out. 10632 North 21st Ave., Suite 11 Phoenix, Arizona 85029 Bob did an impressive job of flying, and had he not experienced flameouts (602) 944-4626 a subsidiary of Pace Industries would have been right at the top. Tom lost one fan on his twin ME 262 and with markings that Earl Thompson has mod­ The crowning touch came when they a lack of maneuvering room, the model eled. Unfortunately, their journey west­ asked if I’d like a ride. Hmmm, I thought. was lost. ward had to continue before we were It’s unfinished but then the fella flying Another factor that appeared to play a able to bring model and prototype built it and just brought it back from role in the competition was the heat. Earl together. What a scale pre sentation that Wisconsin. Why not! So off we went into Thompson’s engine went warm on the would make, to park the big one outside the bouncy yonder. No cockpit insula­ first flight and caused a quick landing. the scale cage! tion or upholstery made it sound like a Yours truly never did get a good run, and A second incident that proved inter­ trip in a tin can full of firecrackers. while one flight was satisfactory, the esting to the Underwood clan occurred Hiperbipe appeared more like a "Low- when representatives from a local flying Then he asked. "How about a barrel perbipe” compared to its usual flying service at the airport spotted the Hiper- roll?” So we did, except it wasn't a characteristics. bipe in the scale area. It seemed that a barrel roll since the spinner point never It was great to note the flying area big one had just been completed a week left the horizon line. The flight was filled with a great variety of types of super! Crisp! Exciting! The pilot and and half before (not actually completed models. Some years the flight lines have builder is a crop duster who has recently . . . no paint, wheel fairings, etc.). The 25 appeared to be factory assembly lines gotten into the Sportsman class in hours necessary for it to leave Lincoln with the same version of the same had been quickly gathered and it went aerobatics and is teaching himself. aircraft appearing over and over. With The R/C scale flying occurred on off to Oshkosh. Upon its return, our the excellent job the industry is doing, Friday and Saturday evenings between 5 model and it were brought together for it’s becoming much more difficult to some pictures and a videotape made by and 8 p.m. and on Sunday beginning at come up with a model that hasn’t been 8 a.m. It was impossible to begin at 5 the owners. done. each evening and, as a result, one round Three rounds were flown, and each was not completed each evening. This is person had an opportunity to fly in front an unfortunate circumstance, since it ‘SCALE CLAS of each set of judges. While there was tends to create at least a weather im­ some point spread between sets it was balance. Hopefully, this can be resolved. not excessive, and from the beginning it The flying judges had been selected would appear that in Sport Scale the and screened for full-scale flying experi­ necessity of having two consistent flights ence as well as scale model judging. A was important. Of course, in Precision, Plans & Construction M anual long session was held with Dick Carson, only one flight score is used. The weather ’CURTISS HAWK ΡβΕ I * STINSON RELIANT 8RS Scale Manager; Dale Arvin, Scale R/C factor did not completely even out, '4 S c a t· Ø4.1* Sp an ·22.·<> V4 S e e l· 12«* S p an *20 · ° r S c a l · W β ρ · " *12.®° 2*Seal· Μ* 8ρ·η ·1β.·® Director; and John Preston, Scale Di­ since Saturday was quite a bit windier, lV8c*l· 4?νβρ·η ·10·βο [ iV Sc·!· W βρ·η ·12.·<> •C U R T ie e QOSH AW K F11C« rector. John has been working diligently and since it was not possible to get in r Sc·!· «3- Span *16.·· through the Contest Board and NASA to one round each day, some missed the •CURTISS OULFHAWK 1A • · ■ 1 8 c m W Span ·ΐβ <» · Naw '•4 S eal· P4Vi~ Span *30·°° develop judges guides, and much of this opportunity to fly on Saturday. CMMNUS Add a»oo Mika al I a*ywt«nl· lot information was put into play. The The results of the event were as R ichard Q. B arron m s Hoity spring uv attempt was to work toward "scale-like” follows: judging of the flying. Through these PRECISION SCALE procedures it is hoped that refinement Bob Wischer — Piel Beryl

86 R/C MODEL BUILDER TATES

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A snappy Land Vehicle developed for 2 channel R/C, expertly designed featuring accurately die-cut Balsa, precisely vacuum-formed parts, Hardware and detailed Plans and Instructions. concerned the emphasis placed on model speed and maneuver quality. A For Radio Control or Outdoor Rubber & C 0 2 second protest tends to follow the same and a Complete Line of Indoor Models type of line, while a third one concerns MICROS Come to Micro-X for your Modeling Needs! prefabrication and the "builder of the model" rule. Strangely enough, this Be sure to order in time column spoke to the third item in the before the Holiday Season Rush! September 79 R/C MB, which came out during the week of the Nats. The con­ EXETER MICRO-X PUTS EXCELLENCE cerns, of course, still exist and will be .23-.35 Powered IN YOUR MODELING'! addressed by the Scale Contest Board. Fun acrobatic The problem of prefabrication is very with performance complex. As one Board member men­ as good as it tioned, every time someone produces a looks!! - S47.95 A kit, the "average” raises. This is natural. R/C By the same token, the ardent scale sport scale builder who works from scratch feels model designed that some compensation need be to fly in small made for six months to a year's work on a areas at slow single subject. In addition, he runs the speeds and risk of losing points for outline, while perform flawlessly the prefab kit has it built in. Such items at higher speeds! as decals, etc. fit into the picture as well. TAYLORCRAFT - 526.95 Yes, indeed it poses a complicated problem to solve. The bonus which used to be given to scratch built models caused problems as well. Sometimes "scratch” was inter­ preted to be from plans but no kit. Others held it to be from nothing but a picture or three-view. In addition, the reward of 1 0 bonus points proved to be a bundle in Sport Scale, where bare Stinson fractions of points separate models. aylorcraft My tendency now would be to state Send for C Micro-X-Pr Peanut Scale Indoor $4.25 that certainly there were some problems P.O. Bo* 1063-A Peanut Scale Outdoor 54.25 at the Nats. When you have a competi­ Lorain. Ohio 440 Semi-Scale-CO; Outdoor $5.50 tion involving so many personalities you ____ almost always do. But I would urge patience. With the advent of judging George Rose — P6 E modelers (NASA) awarded flight guides which are currently being voted Bob Underwood — Hiperbipe achievement awards. The basis of these on and the dedicated work of a number SPORT SCALE awards is not only thescalequality ofthe of persons toward training individuals, I George Buso — Navajo flight but the difficulty of the subject as sincerely feel that within the next few Ralph Jackson — Windecker Eagle well. In free flight, the awards were won years we can achieve much in this area. Harold Parenti — Bearcat by Tom Comparet in Indoor and by Bob There are a number of scalers about Steve Sauger won the Sterling Award Haight in Outdoor. The control line the country who have weatheied prob­ for highest static in Precision Scale and awards went to Ken Long in Precision lems and discouraging circumstances Harold Parenti took the best Military Scale with his Betty Bomber and to Kathy but continue to work patiently and Scale Award with his Bearcat. Kirn flying an .049 Bonanza. Radio quietly to overcome them. They realize In all three scale events, free flight, control flight achievements went to that perfection is probably not possible, control line, and radio control, the Steve Sauger in Precision Scale with his but that goal provides direction. National Association of Scale Aero- Lockheed Orion and Bob Violetťs A4 in Some time ago, I was told that a Sport Scale. baseball umpire is never wrong on a n There were several protests which safe-out call at first base. He is always r SOARERS - were generated by the competition this right, because what he is called upon to year. One we have already alluded to do is to make a judgment call. Your judgment may not agree with his, but he IN STOCK FOR IMMEDIATE SHIPMENT is not wrong. Neither are you. It is simply a matter of perception. What is needed QUADRAS $97.50 is work to bring these perceptions closer QUADRA REPAIR · $10.00 plus parts in line. This is exactly what the Contest Jim Messer's ERCOUPE KIT - $195.00* Board and NASA are attempting to do Concept's BIG FLEET KIT · $179.95* through the development of judging Barkley's TIGER MOTH KIT · $249.95* guides. Your input in the form of sugges­ * includes FREE DuBro wheels tions and understanding is needed. In 1/4-SCALE PLANS (for Quadra) some cases your physical help is needed Fifty 3-views of the world's ERCOUPE. STEAhMAN. to put the items into practice. most popular sailplanes, with SKYBOLT · $20.00 ea. basic data and manufacturer's ZINGER & TOP FLITE PROPS - 10%off In conclusion, it is interesting to note B A LS A · all popular sizes - 50% o ff names and addresses. that two of the protests include inaccur­ COCKPIT KITS for Ercoupe, Stearman, ate interpretations of the rules. In one $14.95, postage $1.50 Fleet, also Radial Engines - $15.00 ea. 24-Hour Service . . . Add $2.00 postage. case the protest stated, "Several air­ GRAHAM THOMSON LTD Send Bank Check or Money Order to: planes were picked up and (the) bottom of the airplane (was) shown while being 3000 AIRPORT AVENUE JIM MESSER'S QUALITY MODEL judged in (the) circle. This is a ‘no-no’ in SANTA MONICA, CALIFORNIA 90403 PRODUCTS 106 Valley View Dr., Allegany. NY 14706 Sport Scale.” That statement is not true, V as per rule 6 .1 , and has become increas- 88 R/C MODEL BUILDER _ m Aero Sport Six Systems Include: 6 channel _ _ ^ _ receiver, 6 channel transmitter, all Ni-Cads for ■Έ I I WT I I ■ ■ I I | | I U both transmitter t receiver airborne, dual Charg CHRISTMAS Km I I I I I I I I I ^ I V er 'charges both sets of batteries at the same ■ J l j l I I J v l l l l l I Λ Ι A time), four (4) NS-IC servos, servo trays. MW· W WWW I t V in extra servo wheels, instruction book, frequency flag and full ItO day warranty. 72 mHz only. Radio Control System 184" PRICES!

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Include: 3 channel Aerp Sport Four Systems Include: 4 channel receiver, 3 channel transmitter, both for AA receiver, 4 channel transmitter, all Ni-Cads for Add $3.00 postage & handling Alkaline battery operation (batteries not In­ both transmitter and receiver airborne, dual cluded). two (2) NS-IC servos, dry airborne charger (charges both batteries at the same California residents add 6 % state sales tax battery box, switch harness, frequency flag, time), four (4) NS-IC servos, servo trays, ex­ servo trays and full 180 day warranty. Choice tra servo wheels. Instruction book, frequency of 72 or 75 mHz. flag and full 180 day warranty. 72 mHz only. There is a kingpost at the center of the EIGHT "ELECTRIFYING” EVENTS!! horizontal tail on top. Wire bracing is 1. JR. FREE FLIGHT: Unlimited motor run. used to support the wings and the tail. ASTRO FLIGHT 3-mmute max, tor contestants under 16 Small “ X” s mark the points where the years ot age only 2. FREE FLK5HT SCALE: Mooney system lor bracing will penetrate the covering. If 6TH ANNUAL ELECTRIC scale judging and flight scoring desired, put a small pad of wood at each 3. OLD TIMER REPLICA FREE FLIGHT: For Astro 02 motor only, any old timer, 25 second “ X” where there isn’t already some CHAMPIONSHIPS motor run, 3-minute max. hand launch. structure. 4 UNLIMITED FREE FLIGHT: Any motor, any Free Flight CD: Bill Stroman, (213)868-1479 plane. 25 second motor run. 3-mmute max. Propeller diameter is restricted by the R/C CD: Bob Boucher. (213) 472-6344. 5. R/C POWERED SAILPLANE: A 2-minute skids, so either carve one to suit yourself motor run and 6 minute max, with spot landing bonus points. or cut down a commercially available ALL OWNERS OF ASTRO FLIGHT 6 SPORT PATTERN: Novice Pattern with spe­ plastic one. cial handicap bonus points tor planes with SYSTEMS ARE INVITED TO OUR less than 4 channels. Anyone can win this A realistic covering for this model can SIXTH ANNUAL ALL-ELECTRIC event! be condenser paper. To keep your light­ 7. SPORT SCALE: Stand-ofl scale. Mooney CHAMPIONSHIPS. TROPHIES TO judging system, extra bonus points lor multi- weight structure from warping, omit the THIRD PLACE AND FOR GRAND engine aircraft dope. Condenser paper is already pretty 8. ELECTRIC OLDTIMERS: A 2-minute motor impervious to the flow of air, so it really CHAMPION. PRIZES FOR ALL. run and 5 minute max. with spot landing COME JOIN US IN THE QUIET bonus points doesn’t need doping. If it is water shrunk it will be smooth until you get a humid REVOLUTION AT MILE SQUARE, Preregistration requested. day, when some wrinkles may appear. FOUNTAIN VALLEY, CALIFORNIA Each event: $2.00 All events: $6.00 All events for whole family: $10.00 These are not necessarily out of scale, ON JAN. 20,1980. Send check and registration to Bob Boucher. considering the date the original was Contest limited to Astro Flight systems only. 2301 Cheryl Place. Los Angeles. CA 90049 made. They will disappear again when NEW VOLTAGE BOOSTER the weather gets dryer. A close look at the photographs will reveal that they ATTENTION ALL ELECTRIC FLYERS!!!!!! NOW YOU CAN CHARGE ALL ASTRO were taken on a humid evening. FLIGHT ELECTRIC SYSTEMS FROM YOUR The original model flies in smooth left CAR BATTERY. THIS NEW ELECTRONIC circles. It is heavier than it should be at VOLTAGE BOOSTER MAKES 24 AND 30 3/4 ounce, counting about 1/4 ounce of VOLTS FROM THE 12 VOLTS AVAILABLE ballast in the nose. Best flight time so far FROM YOUR CAR BATTERY. SIMPLY is 25 seconds. Average flights have been PLUG RAPID CHARGER INTO BOOSTER about 18 to 2 0 seconds long. FOR HIGH VOLTS. Oh yes, a carved styrofoam pilot also • Charges Astro 10,15,25 and 40 · Light and compact, adds weight, but adds something to the systems. impression of scale. · • Uses regular rapid charger. · Both lighter receptacle and banana • Eliminates need for extra gel cell. plug output terminals. Fuel Lines. . . . Continued from page36 Available Dec. 1 Stock No. 40 25 List price $29.95 See your dealer or order direct. CO 80110. If that’s a bit steep on your budget, then you might consider a NEW 12 VOLT POWER SUPPLY Heathkit Thumb Tach; $29.95 for an ATTENTION ALL ELECTRIC AUTO FANS. easy-to-assemble kit. There is one draw­ ASTRO FLIGHT BRINGS YOU A POWER­ back to the Thumb Tach. On the high FUL TWELVE VOLT POWER SUPPLY FOR rpm scale, 1 0 0 0 rpm markings are only INDOOR RACING. JUST PLUG INTO NEARBY 110 VOLT OUTLET AND GET 12 slightly less than 1/16 of an inch apart. VOLTS AT 4 AMPS FOR YOUR AUTO Thus, you must interpolate for hun­ CHARGER. THIS FIRST CLASS HEAVY dreds, and about the best one can do is DUTY POWER SUPPLY WILL LAST FOR to estimate in several hundred rpm YEARS AND YET IT WEIGHS ONLY 4 chunks. POUNDS AND REPLACES HEAVY LEAD Ideally, one should record engine Banana plug output terminals performance subsequent to a thorough Lighter receptacle output. engine break-in. Keep a logbook for Input 110 volts from wall receptacle. each engine. Use a reference prop, glow Output 12 volts at 4 amps D.C. head or plug, and fuel for each particu­ lar type of engine, and record the Available Dec. 1 Stock No. 40 24 Only $29.95 RSTRO FLIGHT inc. atmospheric conditions at the time of 13377 Beach Ave„ Venice CA 90291 PIONEERS IN SILENT FLIGHT the test. At the minimum, note the temperature, pressure, and elevation. If you can obtain the dew point, so much ingly common in some areas. The rule There are many models which can be the better. Keep that prop, and only use only establishes that the judges remain a constructed even in 1/3 scale within it with the same fuel mixture and glow specific distance away from the model, those guidelines. element whenever you want to check not that they cannot view the bottom of Let us carefully weigh all our decisions the performance of theengine. On both the model. and proceed in an orderly, purposeful T.D. and reed valve engines, also record In a second protest, the originator manner. We all wish to enjoy the won­ the number of glow head gaskets to­ states, when concerned with model derful world of scale modeling. · gether with the type of glow head. Thus, speed, that “ this prejudice almost elimi­ you will have a reference or standard nates smaller airplanes and emphasizes Peanut...... Continued from page 59 against which you can check the per­ airplanes 1/4 scale or larger. Which, by formance of an engine, taking into con­ the way, are illegal per AM A rules.” This section wood pieces and cementing sideration the atmospheric conditions. also is not true. Nowhere in the rules is them in the proper locations. A fine OK, you’re down 1000 rpm. That’s a the scale which can be used limited. The gridwork of lines can represent the limits are placed on weight and engine radiator on the front face of the nose lot. There may be one or several reasons why. For convenience, I'll discuss them size. If a model can be constructed to fit block. within those limits it could be any scale, The cabane struts form a four-legged in two categories: mechanical and 1/4 or larger. Those limits are 15 lbs. for pylon above the cockpit. They meet at other. single engine, 2 0 lbs. for twin engines, the center and are cemented to the top MECHANICAL LOSSES and 1.25 cu. in. total displacement. longerons. Perhaps the most common cause of

90 R/C MODEL BUILDER power degradation in Cox engines is so- called "varnish.” It’s that brownish looking coating that accumulates on the cylinder wall, piston, and head. It’s due to incomplete fuel combustion. It’s unavoidable, it increases friction, and it HP ENGINES interferes with heat dissipation. How­ HIRTENBERGER — AUSTRIA ever, we can easily remove accumulated deposits. Simply remove the cylinder and piston and scour them with plain 0 0 0 steel wool. Wrap some of it around a HP120 GOLD CUP POWERTWIN piece of quarter-inch dowel .. . like a cotton Q-tip . . . to clean up the inside of the cylinder. Do not use wire brushes. If you do, you’ll probably damage the unhardened steel cylinder. After you've devarnished the cylinder and piston, wash them with a detergent and warm water. Then thoroughly rinse and dry them, apply some WD-40, and reassem­ ble the engine. I suggest you install a new glow head rather than trying to salvage one that’s really varnished. Further, often just installing a new glow head will bring back some power. Another very common power robber is a loose ball-socket joint where the connecting rod is connected to the piston. I’ve mentioned this previously as a problem area (see R/C Model Builder. September 79). Prudent use of a reset tool is the answer to this problem. End those big engine vibration problems with the smooth running HP120 power- Next on the list is loss of compression. twin. The perfect engine for 1 /4 scale airplanes or a tournament of champions scale Put a prop on your engine, juice it up aerobatic design. Marine version ideal for the new giant scale unlimited hydros or maximum performance racing boats. with a little fuel, and gently flip the prop The powertwin uses the widely acclaimed gold cup 61 major components (schneurle without pulling your finger away. If a porting, chromed sleeve, dykes ring). Engine is of an alternate firing type with a blade doesn't come around and strike single HP automix throttle. Crankcases can be reversed so that the exhaust loca­ your finger smartly, you may be losing tions can be fixed for proper exhaust manifold locations. Gear reduction units, compression. Now give it a hefty flip just special exhaust manifolds, tuned pipe, motor mount, will be available soon. as if you were starting the engine. The SPECIFICATIONS prop should rock back and forth several Displacement 19.8ccm(1.20cu. in.) times against compression. If not, look Weight 970 grams (34’/. oz.) for compression leaks. Maybe you have Length 6-3/8 in a scored cylinder and piston, or a poorly RPM Range 1800 to 14000 fitting set, or possibly they’re just worn Horsepower 3.13 out after long and faithful service. Suggested list price $350 Another area to examine is where the (Specification· sublet to change without nohee Otow ptug· no* indudad J head fits into the cylinder. Dowse it with fuel and pull the prop through compres­ Available at your favorite dealer sion. Bubbles around the head are a sure reason for power loss. Try several heads MIDWEST MODEL and new gaskets. If it still leaks, then the head seat of the cylinder is the problem. SU PPLY CO. In unusual instances, this could be a manufacturing defect. Other times it is Naperville Dr. · Romeovllle. IL 60441 · (312) 759-1955 due to cylinder distortion caused by overheating. Unless you have consider­ uniformly. stand than in your plane, the answer is able machining capability, the only obvious. solution here is a new cylinder. As for the fit between the crankcase What else can go wrong? Well, car- Other areas to check for leaks are the and crankshaft, some clearance is ob­ buretion could be the culprit. Don’t backplate and crankshaft. Bad leaks at viously necessary. But if you can feel hesitate to thoroughly clean the needle the backplate can be observed by using very noticeable radial play between valve assembly, and replace any seals the same technique described for glow them, they may be too loose. If fuel with new ones. This includes the plastic head leaks. Small leaks at the backplate really slops out the front end when the carburetor housing. If it’s old. it could be are more difficult to detect. Examine the engine is running, the fit is too loose. distorted and thus be a source of un­ mating surfaces of the backplate and When in doubt, replace them, especially wanted air leakage. crankcase. If the backplate has nicks, the crankcase. Finally, be absolutely sure of the etc., replace it. If it's the crankcase, you Another frequently overlooked cause integrity of your fuel system. This was might salvage it by refinishing it. Use a of power loss is the engine mount. Do covered in depth in the October ’79 flat surface such as a piece of glass and a you have a solid one with smooth issue of R/C Model Builder. Perhaps you piece of 600 grit silicone carbide sand­ parallel surfaces? How about the crank­ may want to review it again. paper. Place some newspapers on a case mounting lugs? Are all your mount­ That pretty well covers the common table, then the glass, and last the 600 grit ing bolts torqued equally? Crankcase causes of T.D. mechanical power losses, paper. Hold the 600 grit in place with distortion due to poor mounting can however, there are a few others that can one hand, and using a circular motion, easily rob you of a thousand or so rpm. affect reed valve engine power. Fore­ hone the back of the crankcase. Be Check it out carefully. If your tachom­ most of these is the reed itself. A cracked extremely careful to remove metal eter shows more power on a good test or deformed reed is bad news. Even if it

DECEMBER 1979 91 ANEW ERA PUBLICATION MODEL OF THE MONTH AEROBATIC AIRPLANES B&B Special 520 BY ROB'T. C. MORRISON The October column featured a photo of Carolyn Burks and her Class A model INCLUDES which she flew at Pensacola. Hubby Bill IB SCALE DRAWINGS! sent me this 3-view and a few more details on this good-flying model. The η τ $ 3 . 9 5 PLUS 5 0 ct POSTAGE weekend following the Pensacola meet, [CATALOGS $ 1.00 | Carolyn put up 9 straight maxes at a Cliff Cloud Climbers meet and won a first FOR ANYONE place trophy for the first time in her FASCINATED BY AIRPLANES 4-year flying career. The B&B Special is a joint design effort by Bill and his son Bob, starting with a 1/2A version (280 sq. in.) back in 1973. The Burks are a real free flight family. Bill, Bob, Carolyn, and 14-year-old Patti have won some 50-plus trophies with 48BOO MCKENZIE HWY. various size B&B's, including National VIDA, OREGON 9748Θ records and placing at the Nats. The 3-view is the 520 sq. in. size, for .19 looks good, try changing it, and then That completes the discussion on to .23 size engines. Other sizes are clean the housing, and recheck the mechanical power losses. Unfortunate­ available from Bill Burke, 14351 Olympic power. When you do this, it’s also a good ly, space is running short,so I'll cover the Dr., Dallas, TX 75234. idea to replace the gaskets between the other principle causes of power losses ROLL YOUR OWN tank, crankcase, and backplate. Reed next month. Until then, have some good By Louis Joyner, from the FFFliar, valve overhaul kits are inexpensive flying sessions, and remember to think newsletter of the Birmingham, Alabama ($1.60), and they contain new gaskets, a SAFETY. · FFFlyers. reed, all screws, and even a new spinner. Rolled balsa tube fuselage construc­ A good investment. When you overhaul F/F ...... Continued from page 57 tion offers several advantages over your reed engine, examine the back- conventional sheet box or built-up plate very carefully with a magnifying tive-looking FAI model by a famous building techniques. Rolled tube fuse­ glass. These backplates are die-cast, and designer. The wing and stab outlines lages or booms are quick and easy to can be cracked by overtorquing the should let you know the ancestry, and build, are more streamlined than square mounting or machine screws. Any crack the 3 engines should jog your memory. sections, and look better. There are, in the backplate is certain to cause a If you think you can identify it, send your however, a few drawbacks: you have to power loss. When you reassemble the guess to the R/C Model Builder office to have a form to roll the tube on; wing and engine, be sure everything is clean, and see if you’ve won a one year subscrip­ stabilizer mounting is more difficult; torque all machine screws equally. tion. covering with tissue is a little harder; and a round rubber model tube is harder to hold when fully wound. If you would like to try a rolled tube fuselage, here are some general tips and a few specific suggestions for different model types. The proper size form is essential! For constant diameter tubes (i.e., rubber model motor tubes) use a shower curtain rod (available at most hardware stores). For a Wakefield or Mulvihill model use 1-1/4 inch diameter rod; for Coupe or P-30, use 1~inch diameter rod. Other possible forms are aluminum tubing (expensive) or fluores­ cent light tubes (usually a little big). These two form sizes (1-1/4 and 1 inch) are a near-perfect match for standard width balsa sheet (4 and 3 inch) so little or no cutting is required. For a tapered boom the most readily available form is a pool cue stick. Choose an inexpensive one that is straight and has a constant taper. Billiard equipment suppliers are the best source (consult the yellow pages). A cue stick is suitable for booms for almost every model type except large gas models. Balsa used for rolled fuselages should, of course, be straight-grained and flex evenly across its width without any hard or soft spots. Thickness and density will depend on use. Here are some sug­ gestions: BOOMS: P-30: medium 1/32 Coupe: medium 1/20 Wakefield and A/2: medium 1/16 MOTOR TUBES:

92 R/C MODEL BUILDER P-30: medium 1/20 Coupe, Mulvihill, Wakefield: medium 1/16 with various treatments inside and out. BOOM CONSTRUCTION When you thaik retracts... Select balsa sheet of desired width and thickness, cut to desired length, then cut strip of stiff paper to same width as balsa THINK sheet and wrap around tapered form at point where ends of strip just meet; mark this point on form. Next, measure and mark boom length on form. Wrap another paper strip around form at this point and mark circumference. Mark and cut balsa sheet so that it tapers from ROM M R full width to end circumference. Next, soak balsa for half an hour in warm water, gently wrap around form using strips of masking tape to hold tem­ -μ M C · porarily. Be sure seam is straight! Then wrap rubber strip (old motors) around boom, being careful not to crush the * STANDARD MAINS * FLAT MOUNTED balsa. Let dry overnight. Remove from Reversible-Inboard or outboard cylinder* NOSE GEAR form, glue seam with Titebond or Hot Stuff, sand, dope, and cover with tissue. If you can stand the weight, cover with 3/4 oz. fiberglass cloth for added strength (highly recommended for power models). MOTOR TUBE CONSTRUCTION Follow same procedure described above, but tissue the inside (before rolling!) for protection against rubber lube. Simply dope one side of the sheet (which will be the inside) and tissue cover in the usual manner. Then soak and wrap as above. Outside reinforcing of the motor tube will depend on how much weight you can stand and whether you use a wind­ ing tube. For Wakefield, I spiral wrap the balsa tube with 2 -inch wide veneer edging tape (available at most hardware stores) using Titebond as the adhesive. The tube is then tissued. Other possible treatments include tissue only (P-30 and HAND VALVE Mulvihill) and fiberglass. COLOR CODED HOOK UR TURING

Inside reinforcing, for Wakefield OTHER MODELS AVAILABLE: motor tubes, consists of 2 layers of 1/64 » '.A X MAINS Cytimfer Owtfcoarrf-Not R .v.,.,b l. MAINS tor PLATT FW 190-09 - with 1/14" Pr.form*d Wir· 1 ply (about inch long) glued inside the 90 ROTATION MAINS tor P-40 Tomahawk or F4U Corsair front of the tube. At the rear, use a •HEAVY t/H" STRUTS on spocial ardor only. longer (1 -1 / 2 to 2 -inch) strip of 1/16 balsa, extending out the end of the tube about an inch. The 1/64 plywood is then R O M AIR-CHOICE OF CHAMPIONS glued inside. The balsa tube extending ΗΗΠΜ out the back is sanded to a slight taper © RHDM PRODUCIS MANUFACTURING CORP. and the boom glued on. Then sand, mtm 924 65th Street, Brooklyn, New York 11219 dope and tissue the whole assembly. Pour dope down the motor tube and pour out for extra protection from lube. duster kit just defied you to make it fly Competition Models is going out of It is easier to cut access holes, notches badly. All the wood was of top quality, business, since Sal wants to take it a little for stab mounts, rear anchors, etc., after the die-cutting was clean, all the parts fit, easier now. Kits will no longer be made, covering. and the flying directions told you just but those remaining can be ordered AN ERA PASSES how to make it fly. And a lot of reason for from Sal Taibi, 4339 Conquista Ave.. I guess all good things must come to the kit being so good was that Sal gave Lakewood, CA 90713. Sal informed me an end, but writing an epitaph for the every kit his personal attention, from that copies of the original kit plans, ubiquitous Starduster just doesn’t seem selecting and cutting every piece of including a sheet of airfoils, may be possible. With the possible exception of wood, to supervising the die-cutting and ordered through John Pond’s Plans Carl Goldberg’s "Zipper,” no other free making sure the orders went out on Service (see ad in this issue). flight design has impacted the sport time. And if he was at the same flying Au revoir, Duster! more than Sal Taibi's Duster. Since 1958, field and noticed you having problems, COX CONQUEST UPDATE every new free flight design worth its salt he’d personally walk over with some On August 29,1 received an answer to has had to be compared to a Starduster. friendly advice. If you flew a Duster, Sal my question, "What happened to the The secret to its success (and over­ was in your corner! Cox Conquest .15” from the Cox Mar­ whelming popularity through the years) If you want a Starduster kit, for col­ keting Department. was that ANYBODY could make one fly lecting, flying, or growing nostalgic "Dear Mr. Hutchinson: well enough to win contests. A Star­ over, this may be your last chance. "I regret that your May 8,1979, letter

DECEMBER 1979 93 BALANCED RUDDER: A bad idea, stolen from full-scale design, in which part of the movable rudder is hung out ahead of the hinge line to help "balance” the load on the controls. It has two distinct disadvan­ tages. In a turn (see drawing) it presents simultaneously two radically different airfoils to the airstream; one of them is a kind of "curved plate” and the other isa flat plate at twice the angle of attack of the curved plate. Common sense tells us that both these airfoils can't operate efficiently at the same time; by the time the curved plate assumes an efficient angle of attack, the flat plate has long since stalled. The result is a high-drag turn, and who needs it? The second disadvantage is that a copy of the appropriate parts numbers balanced rudder ALWAYS fishtails at and prices, and Cox was able to supply very high speeds. I ’ve seen lots of me in about 2 weeks. However, the 10% excellent builders try to overcome this handling fee sounds like an unmitigated problem, but I’ve never seen one suc­ ripoff, since the parts prices are full ceed. retail, and your local shop can’t get them CENTER OF GRAVITY: for you unless they’re an authorized Cox For our purposes, this means the fore- Service Agency. and-aft balance point of the complete Anybody out there got any ideas plane, with prop on and a full tank of about how to get Rossi parts? · fu . . . oops, excuse me, I mean fully charged and ballasted and ready to launch. Gibberish .... Continued from page 33 Careful, consistent pilots like Colo­ inch wing with an 8 -inch chord would rado’s Skip Miller carry a small "CG (quick! divide 100 by 8 !) have a 12.5 tester” in their field kit; a flat board fora aspect ratio; a 1 0 0 -inch wing with a 1 2 - stand, about 6 inches square, with two inch chord would have an AR of only 8.3. holes in it for a couple of dowels that Which one would fly better? The answer stick up like football goalposts. This depends on the current fad. Ten years device Skip sets on the ground or the ago, high AR’s were in, 18 to 20 being hood of somebody’s Continental, and of inquiry has been discovered un­ common figures. Today most of the hangs his glider between the dowels to answered. contest winners fall between 10 and 13. check the CG. The dowels are rounded "The Conquest .15 engine was not High aspect ratios are more efficient in on top, and large enough in area not to carried in our 1979 catalog because it has theory, but lower ones usually launch leave dents in the bottom of the wing. A been shelved for future development. better, turn tighter, and are structurally couple of wedge-shaped pencil erasers "Service parts are available from the stronger. As newer building materials slipped over them would be ideal. In Customer Service department by mail­ (carbon fiber, kevlar) come into use, serious competition, Skip checks his ing us your check for the price of the AR’s may eventually climb back up a bit. plane often; even relatively small (1 / 8 - parts needed, plus a 1 0 % handling But don’t hold your breath. Incidentally, inch) CG shifts can make a difference in charge.” if you know only the span and area, but how a plane handles, penetrates, and Cox is a bit quicker in handling parts not the chord of a wing, the aspect ratio responds to lift. orders than in answering letters. My formula is span squared divided by area. The important thing to remember local hobby shop provided me with a It works! about the CG is that it is always mea-

/ ------“SEGUIN” WOODEN STEAM TUGBOAT Scale V," - 1 loot LENGTH 26” BEAM 5"

This elegant example of Victorian design is the oldest Wooden Steam Ship under American Registry and the only Wood Steam Tugboat lefl She is a registered National Histone Landmark The model was developed from measurements taken from the real vessel and blueprints made available from the Maine Maritime Museum at Bath We furnish sufficient plans and materials to construct an authen­ tic · museum scale model which can be powered by a small steam engine and steered by radio control The Kit features • Simplified plank on frame construction in quality hardwoods • Complete plans instructions and detail information • Materials for planking, cabin deck furniture, keel rudder, spars and all other wood parts • Complete fitting set including propellor shaft and log brass stanchions, running lights chocks, steering wheel life boat and davits, stack and whistle blocks and rigging chord • Designed for steam power and R/C • Complete kit consisting of all above ...... $97 50

94 R/C MODEL BUILDER sured and marked on the wing, not the suppose). The stab’s job of holding the stab you approach the condition known fuselage, if your plane has rubber-band wing at the desired angle of attack is in free flight as "zero-zero trim,” when wing tie-downs. what the whole business of "flying” is both the wing and stab are flying at zero CENTER OF PRESSURE (alias "center of about. Too much decalage (read: "too angle of attack. In this condition no lift is lift/"‘aerodynamic center of the wing”): much up-trim in the stab”) makes the generated by either surface, and the This is the point on the wing chord wing try to fly at too high an angle of plane will begin to assume the flight where all of the wing's lift appears to be attack, so the plane constantly wants to trajectory of a rainbow, or a plucked concentrated. I think of it as a sort of loop or stall. Of course, it’s possible to chicken, striking the earth smartly at the invisible arrowhead that supports the correct this condition by moving the CG far end of the curve. plane, holds it up, while it’s flying. forward (read: "by adding weight to the Whole books could be written about The center of pressure isn’t a fixed nose” ), but what you wind up with is a decalage. The most painless way to point, unfortunately. On the kind of plane that mushes through the sky in a come togrips with it is to buy a 25c chuck airfoils we use (flat-bottom, semi-sym­ nose-heavy condition: slow and easy to glider and clear all the furniture out of metrical) it shifts around constantly, fly, it’s true, but a real dog, performance- the living room and start making glide depending on the angle of attack. At wise. tests, changing CG and decalage around high angles of attack it moves forward; Too little decalage, on the other hand, until it all begins to make sense. If you at low angles of attack it moves back. In can be even worse. As you reduce the feel self-conscious doing this, try wear­ normal flight it hangs out in the region angular difference between wing and ing a white lab coat and taking lots of of the airfoil’s high-point. Its relation to notes. Nod wisely whenever you think the center of gravity is crucial. An article in the October 1978 MB will tell you A. J. FISHER INC. more than you want to know about center of pressure. manufacturers of quality CHORD: Scale Brass Ship and Yacht VINTA6E H-C PLANS Fittinos since i »2S The width of the wing, usually mea­ plans - Fittinos - Kits - Books sured where it joins the fuselage. Con­ stant chord means the same width all the ILLUSTRATED CATALOG, $2.00 way out to the tip. Tapered chord is more common; the chord gets smaller towards the tip, as in most full-scale sailplanes. This makes the tips lighter (and that’s nice) but more important, it 9 FT. WING SPAN 4 LARGE PLAN SHTS.- P LA N S $ 2 0 . 0 0 reduces the size of the tip vortex (q.v.). QUADRA OR GLO ENGINES „ „ , 2 .0 0 POSTAGE DECALACE: The difference in angular setting (“angle of attack” ) between the wing CATALOG-OVER 50 PLANS 50 φ DEALERS WRITE and stabilizer. Decalage is the most SID MORGAN important single measurement on a ZIP · 4SOS7 model (and you thought it was bustline, I 13157 Ormond, Belleville, Mich.48111 u .s .a .

DECEMBER 1979 95 r into a right bank. Bend the wings down flat (no dihedral) and this bank won't HOT OFF THE PRESS!! occur. And that’s how dihedral makes turns happen. Of course, if you had a set of ailerons NEW FIFTH EDITION you could have rolled up into the bank without all this fuss . .. you wouldn’t need the dihedral OR the rudder, then. Radio Control But that would be cheating. Polyhedral (or the older form, poly­ dihedral) refers to a wing with center dihedral as well as one or more "dihe­ dral breaks” further out on each wing The Radio Control panel towards the tip (see drawing). Buyers Guide is the Most designers feel that dihedral is more effective when it’s placed out toward the authoritative guide to wingtip a ways, so it has a longer moment radio control products. It arm to work through for lifting the wing is the master catalog of up into bank. They're right. the industry with more DRAG: than 2,300 products pic­ The "wind resistance" of an airplane; tured, described, & pric­ the friction with the air that degrades a ed. plane’s performance. Two kinds of drag are important to glider folk, induced The new edition has drag and profile drag. Induced drag is more than 200 pages the drag penalty you pay for getting lift showing the products of out of an airfoil, the drag that’s "in­ more than 250 manufac­ duced” or caused by the lift. It’s approxi­ turers. mately proportional to the lift; when lift Included are the latest increases, induced drag increases right model cars, boats, air­ along with it. Which only goes to prove that you still can’t get something for craft, radio systems, nothing in a second-rate universe like tools, books and ac­ the current one. cessories. The Radio Profile drag is everything else: the fat Control Buyers Guide fuselage you should have made skinnier, is indexed and cross- the receiver antenna dangling out there indexed for easy use. in the airstream, the exposed wing dowels and rubber bands, the sloppy This comprehensive hinge job on the elevator, the unpatched catalog of the RC in­ holes in the Monokote. Reducing pro­ dustry is a must for every file drag is vastly more important on serious modeler I models than it is on full-scale aircraft, Price: $7.75 but few designers seem to realize this Γ yet. Perhaps it's because most model Please send m e . . copies of the new 5th edition of the designers still believe that full-scale A t Better Radio Control Buyers Guide. (Enclosed is $8.25 for each copy ordered aeronautical math applies to models as I — $7.25 retail plus $1.00 postage & handling). well. And sometimes they’re right. Hobby EMPENNAGE: Shops I Name: The rudder and stab collectively; the plane’s "tailfeathers.” or Direct FULL-FLYING STABILIZER (also called an I Street: “ all-flying stab,” or simply “ flying stab’’): C ity, State, Z IP: ______A stab that moves up and down as a Return to: RC Buyers Guide, Clifton House, Clifton, VA 22024 single unit, instead of being divided into a fixed stabilizer and a movable elevator, connected by hinges. In theory, a flying anyone is watching. To see exactly how dihedral makes it stab is a bit cleaner and more efficient DIHEDRAL, POLYHEDRAL: all happen, cut out the top view of an than a hinged one. In practice, it is Dihedral refers to the upward sweep airplane, or reasonable facsimile, from usually heavier and harder to build, and of each wing panel from the fuselage. I heavy construction paper, bend some always harder to design properly. The used to think that rudders made air­ dihedral into the wings, and hold it in whole trick is in finding the right chord- planes turn, and that dihedral was only flying position in front of a low-speed wise position for the pivot wire, or main to keep the wingtips from dragging the fan. As long as the plane faces the fan it axle. The pivot wire is the stab’s primary ground on landings. Then I built a plane will "fly" straight and streamlined. But load-bearer; any time you see a flying with no dihedral, and found that it suppose you swing the nose to the right stab with two identical-sized wires, you wouldn't turn. It seems that a rudder can a few degrees, like a weathervane. Now can bet there’s laziness or sloppy en­ steer the fuselage towards a turn, but the fan is blowing on the bottom of the gineering at work, because only the wire only a wing with dihedral can make the left (upwind) wing and the top of the at the stab’s center of pressure is carry­ plane bank and pull itself around right (downwind) wing. So the upwind ing the load. The other one is merely an through the turn with its own wing lift. wing is suddenly flying at a high angleof alignment pin. Because that’s really what makes a plane attack and generating tons of lift, while Finding that center of pressure can be turn: wing lift. In the popular press the downwind wing is getting hit by a a chore. The usual figures (25% chord for rudders get all the credit for the job, but wind from above, which means its angle flat plates, 30-33% for symmetrical just between us scientific types, it’s the of attack is either very low or possibly airfoils) are only approximate . . . each wing that’s doing the heavy work. even negative. Presto: the plane rolls up stab configuration varies a little. Bad

96 R/C MODEL BUILDER The Minimousetang is designed for two channel MINIMOUSETANG radio control operation with a % A motor The 35 inch wing span combined with approximately BY KEN WILLARD 15 ounce flying weight gives a wing loading of 9.2 The Mirwmousetang is a sport airplane designed by ounces per square foot The kit features quality ma­ Ken Willard with kit engineering by Model Engineer­ terials. rolled plans, building instructions, complete ing of Norwalk hardware package, canopy, and pre-shaped landing gear The building time for the Minimousetang is 7 to This quick building, fun flying plane will put you at 14 hours ease on the ground and in the air With a Cox ORC motor this plane can easily be flown in areas where The following items are needed to finish the model noise and size would not have permitted you to fly radio, motor, tank, covering material, glue. 1 %" mam before wheel. tail wheel. %» collars. collars, and motor mounting bolts Model Engineenng of Norwalk's "THRU-CUT'· die cutting, combined with "TRI-SOUARE-LOC as­ sembly in lite plywood and balsa makes construction simple enough for the beginner The inherent strength of our lite ply construction provides durability and lasting performance. You will Μ.Ε.Ν. l í í be spending more time on the flying field and less at the repair bench Model Engineering of Norwalk TRI-SOUARE-LOC enables us to bring you the best 54 Chestnut Hill · Norwalk Connecticut 06851 in lite plywood construction This method of squar­ ing. straightening and holding parts in relation to one DEALER AND D«STRieuTOR W OutRlES INVITED another revolutionizes construction

INTRODUCING THE NEW M.E.N. RC BUZZARD BOMBSHELL M.E.N.’s re-creation of a classic old timer free flight, strengthened and modified for RC. meets the Society of Antique Modelers requirements for RC Old Time Competition. May be flown Free Flight, Rudder Only, Rudder/Eleva­ tor, Rudder/Elevator/Throttle. M.E.N. Model Engineering of Norwalk 54 Chestnut Hill · Norwalk Connecticut 06851

DEALER AND DiSTReuTOR INQUIRIES INVITEO design only shows up at high speeds: what angle, will directly affect how far it ing craft. This makes all the differ pivot too far forward, surface too hard to goes. (My daddy can throw a higher L/D The air viscosity is identical for mocels move; pivot too far back, surface too than your daddy can.) Then there’s the and full-scale aircraft, but the model’s hard to keep centered. Either way, your question of wind: a plane will glide inertia, the energy it has available for servo loses. farther downwind than upwind. And wedging air molecules apart in order to GLIDER, SAILPLANE: how about the quality of the air ? A plane fly between them, is miniscule. The will glide farther in rising air than in Interchangeable words, to most peo­ energy of air turbulence, of upsetting sinking air, and all air is constantly rising ple. A few cranks insist that a glider forces, is enormous in comparison to a glides downward after release, a sail­ and sinking, even at 4 a.m. Wind tunnels model’s inertial stability. There are few aren't much help, because their air is too plane soars upward. This would seem to formulas that account for ihese things. smooth, too perfect. . . we need models make the definition largely dependent Reynold’s numbers are worihless; lift on the weather. In the 1920’s the British that fly well in real conditions, not ideal. and drag formulas are a joke. Someday formally declared a sailplane to be "a Models are not a bit like full-scale there may develop a science of model glider having a sinking speed of less than planes; the fact that they resemble them aerodynamics: meanwhile, don’t spend a lot of time worrying about glide ratios. . 8 meters (2.6 feet) per second.” Conclu­ in outward appearance only confuses sion: the British had long winters, with the issue. Models have ridiculously low Go fly. · very little to do, back before BBC. inertial forces, compared to man-carry- GLIDE RATIO (LIFT-TO-DRAG RATIO, L/D): A measure of a plane’s efficiency, the —IT’S A SNAP!—i glide ratio simply states how far the The New Super Champ 3É5&É; FREE FLIGHT Features the World's Snap-on mounts plane moves forward for each foot of Fastest Wing! Snaps on to tit most air- HARDWARE altitude that it loses. (Altitude is mea­ and off in an Instant. planes: $8.95 pr. sured in feet in all civilized countries.) No Ugly Mounting Example: a plane has an 8:1 glide ratio, Bands or Boltsl / and you release it six feet above the ground. If it glides eight feet forward for every foot that it falls, it should go 48 feet during a six-foot descent, right? And if it has a 1 0 : 1 glide ratio it should go 60 feet. Simple. Easy to buildTii fly. All balsa & ply. const. The problem is, these figures are ABS tips & cowl,hand-cut parts, rolled plans & snap-on wing system. $54.95 totally meaningless. ALL glide ratio figures for model sailplanes are totally GEMINI MODELS, INC. meaningless. You can’t "release” a 311 Lakeview Ave.. Clifton, NJ 070J1 plane at six feet of altitude. You have to (201) 772-9474 throw it. How hard you throw it, and at pre-pay orders, we ship, dep, req, on c.o.d.

DECEMBER 1979 97 stretching the tissue and making dents. Γ Apply the paint with a soft brush, or an i airbrush if you have one. Remove the I i 'US' G*° R/C GOODIES mask before the paint dries. a>; Assemble the model now, starting CALL ME P O BOX 192 VAN NUYS, CA 91408 with the top wing and proceeding with AT the bottom wings using the length of (213) 764-1490 I the interplane struts to set the bottom wing dihedral. Add the horizontal tail, tack gluing R/C SYSTEM KITS only at the leading edge. Glue the fin in 2 Thru 5 Ch. place and cover the fin bay over the stab • ALL UNITS CONVERTIBLE center section. This will have to be UP TO 5 CHANNELS covered wet because it must take on a natural curve as it shrinks. • 3-CH. SYSTEM WITH The stars and lettering were added 2 CE-4B SERVOS with a pen and white ink. Glue the fairings, wheel pants, and struts onto the $109.95 gear, using the photos for a guide. Add the tail wheel now, using paper strips for SHIPPING S3.50 (U.S.A.) springs. Finish with the aileron push- CALIF. RESIDENTS ADD rods, headrests, carburetor airbox, SALES TA X . spinner, windscreens, and rigging. Some • ALSO AVAILABLE: aircraft have windscreens on the rear CHOICE OF SERVO TYPES. SYSTEM HAS OPEN- FLITE PACKS, RX, ETC. cockpit only, so as to be able to stream­ GIMBALTX, PLUG-IN RX, RX NICADS, CHARGER line the aircraft with a front cockpit AND ONE ASSEMBLED SERVO. cover. The rigging is made from gray silk CATALOG - .50 U .S.A. ($1.50 FOREIGN) thread and is glued with Pliobond. Install a motor made up of two loops of 1/8 Sig gray rubber about 20 inches small details that you think you can long. Balance the model as indicated on Starduster. . . . Continued from page 48 cover without wrinkles. Cover the tail the plan with clay or lead shot. The dry and take care to avoid warps. The fin model flies to the left with 1/16 inch left When the wing panel is dry, remove it fairing is covered after assembly. from the board and sand toshape. If you rudder offset and 3/32 wash-in in the left The model is now given two coats of lower wing panel. Juggle the thrust line want a more accurate wing, add a thinned nitrate dope. Add a few drops of 1/16x1/32 cap under each rib to give it a for fine adjustment. castor oil to your dope to reduce the Enjoy the model, and by all means semi-symmetrical airfoil like the original amount it will shrink the tissue. aircraft. This will cut down on the flight write to me about it care of R/C MB if Add the trim now with tissue if the you build one. · time a little, but it sure looks neat, join base color is light. The model in the the upper wings to the center section photos is deep blue, so enamel was used H alf-A ...... Continued from page 45 with no dihedral. The lower wings have for trim. Masking tissue is very tricky, but 3/8 inch dihedral per panel. the method given here will do the job for. The engine even features a self- Carve the carburetor air box, inter- without damaging the tissue. Buy some engaging spring starter for the greatest plane struts, wheel pants, and spinner sticky-backed cabinet paper and cut the possible ease of starting. from soft balsa and fill the grain of the mask out of it with a very sharp knife. While we are talking about Cox Hob­ items to be painted. After the mask is cut, flip it over and cut a bies, here is Cox’s latest kit, the Warlock Cover the model with Japanese tissue 1/16 border around the mask through .05. This is probably the first Cox kit not or domestic tissue of the base color the backing only. Peel the thin strip of designed by Lee Renaud. We can credit chosen. The wings were covered wet backing off the mask and apply to the Scott Christenson for this little beauty. and were pinned to the board while they model, taking care to put the mask on Wingspan is 32.5 inches and it will fly with dried. Cover the struts and any other with as little pressure as possible to avoid two to four channels on a Tee Dee .049.

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98 R/C MODEL BUILDER SPECIALIZING IN RADIO CONTROL feflARK'S ODELS AIRCRAFT M P. O. Box 2134 Escondido, California 92025 MODEL AIRPLANE KITS FOR THE MODELER 57 years of combined building and flying experience have gone Into the design of each air^'ane in the Mark's Models line. Our active participation in both sport and competition flying assures the modeler he is purchasing a proven practical airplane. See these fine kits today at your local hobby shop. Send stamped, self-addressed envelope for free catalogue.

$44.95 $32.95 GJNNY •Bushwacker Accessories Wing Span ...... 40 in. Wing Span ...... 68.75 in. Wing A re a...... 555 sq. in. Wing A re a ...... 555 sq. in. $52.95 Pow er...... 15 cu. in. Pow er...... 15 to .19 cu. in. With Weight . . . . 3% lbs. (Ready to fly) W e ig h t...... 3 lbs. (Ready to fly) Accessories

Performance should be excellent, since runway. While landing, the propeller of built, most cars can be purchased as the wing is built up for light weight and my model touched tne ground a few complete, ready-to-race units. Even if strength. times, but that was because the landing bought as a kit, the car goes together Last item for the month is a new boat speed was too slow. If the landing is in jet easily and is readily recognizable as kit from Dumas Boats. The "Lil Rascal” is style nothing can happen. being from a certain manufacturer. a high performance Outrigger Hydro for The model is controlled as any other About the only creative thing a car racer two channels and a .10 size throttled F3A model. During the flying you can can do is paint the molded body in an engine. Construction is wood and metal, hardly recognize that there is a pusher individualized manner. not fiberglass in this case. I think the engine. The model is small, and that is One of the people I race with, Greg clear radio compartment cover in the why it flies fast with an O.S. Max .40 FSR. Sheehan, is just about the best example I photo was just for the show model; I It performs every F3A maneuver with can think of as enjoying a modeling doubt that it is part of the kit. Dumas has the exception of a spin. I think it could activity and yet not having any of the done a tremendous service for the R/C perform it, but I have not tried it yet. As I traditional model building skills (and boater by making a wide variety of hard­ found out during meetings with other without any desire to acquire these ware available. Their line of kits is broad model builders, the model itself is nice skills), and yet having fun racing R/C in size, complexity, and range of interest. and attractive. There have been discus­ cars. Greg absolutely loathes working You can get scale models, racers, speed sions about it, and a lot of people want to on his and his boy's car. He has Bob jobs, sailboats, and just sport models build it. If anyone decides to build a Welch paint his bodies for him, not even with all the goodies you need to hook up Vigilante, I wish many nice takeoffs. If wanting to get that deep (?) into build­ your engine without having to be a there is anything in my description that ing the cars. Last year Greg mentioned machinist. · is not understood well, I shall answer that it was a tough season, he actually every question by way of correspon­ had to reset his needle valve twice in the dence. · Vigilante...... Continued from page 17 something very unusual, and that is why when adjusting the needle valve you C/L...... Continued from page 55 must firmly hold the whole model. If a models just don’t fire that urge to go standard model moves a little bit it flying like the C/L and F/F models means nothing, but here an inch is hanging about the shop do. enough and your fingers are cut by the But what seems to be the ultimate propeller, which is nearly a saw. That is example, illustrating that it is not model why you must pay attention to it. On building skills determining the fun takeoff, let it run about 60-70 meters on quotient, is my heavy involvement in the runway, and do not move the eleva­ R/C cars. To approach these models tor. Then slightly touch it and the model looking for an outlet for modeling skills will take off. If the takeoff is too sudden, is almost a waste of time ... if the the propeller can touch the ground. I traditional model builder is doing the should like to mention that this has looking. never happened to me. Of course, I Take a look around at what is offered have been flying from a flat and straight to the car racers. Everything is ready

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season; the year before he had only set it letters, one each from none other than once!! What counts here is that Greg Bill Winter and John Worth. Seems the has fun racing .. . how can he possibly guys in D.C. are very upset with me be criticized for enjoying racing and not again. I would use their letters in this liking to work on the cars? column, as I have done in the past with THIS MANY TEXANS I personally do like to work on the one from Mr. Worth, but with the A M A cars, and although you will never catch sticking to a policy of not publishing CAN’T BE WRONG! me referring to it as model building, anything to the negative in their stuff, I there are a number of things to do with will follow that lead. the cars to make them more competitive What they questioned, primarily, was or match your driving techniques better. my stating that Winter had asked Horace In fact, in R/C car racing I have met some Cain to change something he had of the most competitive and intelligent written for his District Report column. people you could ever hope to find. I reviewed that letter and will stick with

A RICK FULLER Photo Right here in R/C MB you can read what I said. I will admit that Winter Chuck Hallum's column on R/C cars THESE VALLEY R/C FLYERS DIDN'T HAVE didn’t actually come out and demand TO USE 1144 GALLONS OF MAGNUM (Chuck is one of the people I had in that Cain’s text be changed, but keeping PLUS 10 IN JUST 24 MONTHS mind when writing the preceding sen­ in mind that the future of Model Avia­ tence) and discover that it is a difficult Here's what they have to say: tion rests in the hands of the Executive thing to win big in R/C cars... at least as Council, of which Horace Cain is a vocal Extremely clean burning with minimum clean up difficult as it is to win big in any other & no goo or black residue." member, he didn’t dare demand any­ 'Cooler running even with a 14x6 on a O S 60." model competition. thing, anyway, nohow. I would judge "Minimum needle valve adjustments." So I feel that I have tasted what it is like the request to have been as strong as "Runs longer per tank of fuel." on several sides of the fence and have possible, considering the circumstances. "A great idle with a smooth transition to the slowly gone from the antagonistic atti­ Besides, it was used to illustrate the top end " tude delivered by Steve to a more laid- strong feelings, backed up by equally Less wear for minimal engine failure " back one of letting whoever do what­ strong actions, of Mr. Cain. In the past MAGNUM PLUS FUEL ever they enjoy the most and then not we have had people on the Executive in 5 different blends picking on them for doing so. I will still Council (still do, as far as I am concerned) MAGNUM GLOW PLUGS get really irate when a guy clutching a who were only moved to go with the Wide Bar R/C for Cross Flow eng. foamie R/C plane asks me why I still flow, the headwaters being located in Narrow Bar R/C for Schneurle eng. bother with crude and outdated C/L Washington, D.C. Horace Cain seems MAGNUM C.L. HANDLE flying, however.... to think the flow is reversed, or should SEE YOUR DEALER AND THE SHOW GOES O N ... be reversed, as he is out there trying to determine what the AMA members ALDRICH MODEL PRODUCTS The October issue of R/C MB hit the P.0. Box 817 stands and very shortly thereafter an in his District want and then trying to get Edinburg. Texas 7B539 overpaid civil service employee de­ it. His response to Winter’s letter backed 15121 842-3379 or 383-0327 livered to me a couple of interesting that up in his stating that he represented

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Trade Inquiries: POLK’S 314 Fifth Avenue 346 Bergen Avenue New York. NY 10001 Jersey City. NJ 07034 (212) 279-9034 (201) 332-8100 (212) 233-5085 ENGINES «ARCHIVE BOOKS · EKO VEHICLES · Lll SQUIRT PUMP · RE El R/C · ARIS TO HO BUILDINGS · fLVROf 0AM AIRPLANES · MARX IU0ER MOTORS · RUBBER · ARlSTOnGHTBUlBS . fOX MARINE ENGINE · MERITE SOLOIERS · SAITO LIVE STEAM · ARTESANA LATINA SHIP MODELS · fUTABA R/C · MINI CARPE TS · SCAl EXTRICS · AURORA BUS SYSTEM . G MAR» thousands of flying buddies and that Horace Cain’s, this situation is at least their interests were more important to starting to change, but I don't think we him than those of one flying buddy off in can thank anybody other than Mr. Cain Here’s D.C. for that, do you? · In his letter, Mr. Worth tried to make FAI SPEED TRIALS How me feel as if I was an inaccurate and (By Joe Klause) irresponsible reporter. Lots of stuff Over Labor Day weekend, the West B alsarite about inuendo and distortion. Gotta Coast portion of the FAI speed trials was admit, he writes a mean letter. ... held at Santa Ana, California. O n the W o rks... The trick is that when writing for any same weekend, the eastern trials were Iron-on coverings tend to stick only to held at Dayton, Ohio. The average of length of time, you are bound to sooner the surface of balsa, often leaving trap­ or later make an honest mistake; the law each contestant’s two fastest official ped air, then sagging and coming of averages just has to get you once in flights was used to select the team awhile. I don’t feel I have made any members. Californians Chuck Schuette unglued. Balsarite sinks deep into the mistakes for quite some time, certainly and Bob Spahr qualified as the first and wood, then melts and intermixes with not within the past year or so, even if third members of the 1980 USA team; the adhesive of the covering as it is some people within the A M A feel I their respective times were 161.92 and ironed on. No trapped air, only deep have. Chalk it up to a difference of 155.75 mph. Charlie Lieber averaged permanent adhesion. Eliminates sag­ opinion. 158.91 at Dayton for second place. The ging, fuelcreep, warping due to mois­ World FAI Championships tentatively ture, and makes hard-to-reach fillets What I do know is that in looking back will beheld inPolandduringthesummer at all of the stuff I have written in M B and easy to cover. If you use Monokote, of 1980. · now R/C MB. my record has to come Solarfilm and Coverite, you must use off as being absolutely sparkling when Balsarite. It takes the gamble out of compared to what you read in M odel Excaliber.... Continued from page 24 covering with iron-ons. A viation, and more specifically, the BUILDING THE COWLING A M A News section of that magazine. IRON-ON COVERING BALSA Here we have people who have been The plans show a simple, straight “names” in the AMA and modeling, type of cowling for the Excaliber II. I ÍMT W00D but are they heard, or their cases, aired have seen many different cowling in AMA News? There are problems schemes used on this boat besides that within A M A , problems that for the good shown on the plans. You can see some of need to be discussed and then solved. these different cowlings from photos in Are these problems discussed anyplace the article. The aft cowling is removable WITH BALSARITE in Model Aviation, or is only the opinion to allow access to the fuel tank, mounted (defense) of A M A H Q managed to be in the aft cowling, and for making published? adjustments to the engine. For anyone COVERITE Of course, with columns like that of who might be interested, Vic Drew, 1628 420 Babylon Road. Horsham. Pennsylvania

DECEMBER 1979 101 ALTHOUGH INTERESTS MAY VARY HOT STUFF ALWAYS AVAILABLE AT YOUR HOBBY DEALER

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

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

INSTALLING THE RADIO SYSTEM has a fine radio box seal, and I've also m Ř o d i e í There are two methods available for had good luck with the radio box seals installing the radio system in the Excali­ from K&B Manufacturing. The Kwik ber II. Many model boaters prefer to Switch from DuBro Products does an mount their equipment in waterproof excellent job in the mounting of the ^ ^PR^DUCTS boxes and then install the box in the on/off switch for the receiver. WORLD WIDE MARKETING boat so it can be removed. An excellent F O R D & R AND OTHER FINE PRODUCTS If the radio is installed in the boat, K&B choice for a radio box for the Excaliber II Manufacturing has a kit for hooking up BULKHEAD SWITCH MOUNT 98^ is the one available from G & M Models, thethrottle linkage that works very well. M O U N T S O N : P.O. Box 342, Broadview, IL 60153. The I have used it on my boat and found it to Bulkhead of airplane. box, measuring 2x3x5 inches, would fit Rloor of car. be most satisfactory. For the rudder Inside of waterproof very nicely into the radio compartment. linkage, use 1/8-inch brass tubing with boat boxes. I have used this box in other installations threaded shafts soldered to both ends to ... Or any place you and have found it to be an excellent desire. attach Kwik Links to the servo and Push-rod can go In any product. engine. of three directions. It is also possible to build a radio Complete with mounting screws. Use of heavy-duty type servos is a compartment into the boat, and this is good idea on the outboard engine. The 3501-B West Moore St., Santa Ana. the method I’ve used with the Excaliber outboard unit can place a great amount Phone (714) 557-1453 CA 92704 M’s I have built. Four 1/4x3/8 hardwood of stress on the rudder servo, especially strips can be glued inside the radio the servo gears. Corona, Medford, OR 97501, can prob­ compartment so that a plexiglass lid can INSTALLING THE OUTBOARD ENGINE ably provide you with a fiberglass aft be screwed atop the radio compart­ I recommend using either the K&B cowl like that used on the fiberglass ment. Use either gasket material or Autotrim or the Hughey Adjustable Excaliber II he makes. I don’t knowwhat silicone sealer to make a seal between Outboard M ount on the Excaliber II. To Vic might want for making and shipping the plexiglass and the wood strips. achieve maximum performance from an aft cowl, but you could drop him a Waterproof radio box seals are available your outboard tunnel, it will be neces­ note and ask for a price quote. from a number of sources. G&M Models sary to adjust the height of the engine on the transom. The K&B Autotrim also \ allows for adjustment of the engine T he P e rfe c t X m as G ift — angle away from the transom. If an engine mount isn’t used, mount the This Year Get A Schluter ‘Heliboy’ engine where it is shown on the plans. FINISHING THE EXCALIBER II It is definitely recommended that an If you have been a good. kind, epoxy type finish be used on the Excali­ generous. lo\ ing husband (well, ber II. There are a number of good almost), this is the time the products available at most hobby shops family should know that you that will provide a good finish for the want a boat. It should be remembered that a good finish is directly related to good “ HF.I.IBOY" preparation of the hull for finishing. I FOR XMAS like to use auto body putty for filling Cut out this ad. tape it to the cracks and pin holes; it dries very hard in TV screen or refrigerator door a short time and is quite easy to work. and this year you will not be The boat should be sanded and filled waiting in the "return gift” prior to the application of any finishing line. material. After filling cracks and holes, I like to brush on a couple of coats of K&B clear, thinned about 25%. This helps seal the Call or Write ftS.C . MODELER wood and also fills the grain. When the S.C. Modeler, the I I H O B B Y S H O P clear has dried thoroughly, the hull is R/C Helicopter Experts, Helicopters Planes Cars Boats Radios sanded with 220 grit paper and a coat of Or See Your Local Dealer Parts tor RC Hobbiests K&B primer can be brushed or sprayed 1999 Larkin Avenue, Elgin. Illinoia 60120 on the hull. The primer will fill the grain Dept. 120 ______312-697-3737 y and also assist in making any blemishes

102 R/C MODEL BUILDER POWERFUL - RELIABLE - DURABLE AMERICA’S FINEST MOTORS AT A PRICE YOU CAN AFFORD FOX 15 SCHNEURLE BALL BEARING B o re ...... 590 Weight ...... 6 oz. Stroke ...... 550 RPM with 8-4 prop...... 14.000 Displacement...... 15 The new Fox 15 BB is truly an exceptionally advanced design motor The Fox version of schneurle porting provides lour separate bypasses arranged to produce maximum amount ol power as well as exceptional low speed charactenstics Pertormance-wise the Fox 15BB is in the same league as the most powerful lull race engines However, unlike others, the Fox is neither cranky nor difficult to keep running at idle and cruise speeds Some outstanding construction features are Fox patented crankcase; separate head button; flange mounted carburetor for quick change from control line to R/C; removable prop stud; special 10mm bore ball bearings, super durable 8620 crankshaft The Fox 15BB is your best bet for FAI Combat. Goodyear type control line racing, or Quarter Midget R/C racing, as well as sport FC flying. 11698 Fox 15 RB for C.L...... $49.95 21698 Fox 15 BB for R /C ...... 21750 Oversize Carburetor 90242 Conventional Silencer ...... 5.95 for Quarter Midget Racing...... 40716 Button Plug for Racing ...... 3.50

FOX 40BB B o re ...... 800 Weight ...... 11 oz. Stroke ...... 790 RPM with 10-6 prop...... 14,000 Displacement...... 399 The Fox 40BB is undoubtedly one of the finest 40s you can buy. We have concentrated on getting the Fox 40BB to pull a useable size propeller as fast as possible. We know of no other 40 engine, regardless of cost, which will pull a 10-6 prop laster. However this has been done without any sacrifice of idle or throttle characteristics. The motor features the Fox patented crankcase design which is extremely sturdy and crash resistant The flange mounted carburetor we feel is superior to the clamp in design because it produces no crankcase distortion. Improvements for 1979 include a completely redesigned bell shaped combustion chamber which runs faster than before, and a restyled extenor which we feel you will like. The measure of any engine is how it flies your airplane. In this department the Fox 40 excels It is very easy starting, docile lo handle, and puts out excellent power even in over-rich or over-lean settings. The parts are sturdy and structural failures almost never occur. The cylinder is nitrided for long life, the piston fitted with one free to rotate compression ring which practically never wears out.

14100 Fox 40 Schneurle BB for C.L...... $54.95 24100 Fox 40 Schneurle BB for R/C ...... 64.95 90412 Vi" Prop Extension...... 3.00 90252 Conventional Silencer ...... 7.95 90413 Vt" Prop Extension...... 3.00

FOX COMBAT SPECIAL FOX 60 EAGLE Bore ...... 907 Weight ...... 15 oz. Stroke...... 937 RPM with 11-7 ’Λ prop ...... 12.000 Displacement...... 604 Although schneurle ported engines generally produce more power, the baffle type configura­ tion still has quite a bit going for it A baffle type engine burns less fuel because the gas strikes a hot baffle which more thoroughly atomizes and vaporizes the fuel. A baffle engine is also more economical to produce. Unless you are power hungry and prepared to shell out substantial quantities of money for an engine and fuel the Fox Eagle 60 may be your best bet. Of all the baffle 60s on the market the Eagle is probably the most powerful and certainly one of the most economical. For 1979 the Fox Eagle has many significant refinements. The whole crankcase lower end has been enlarged to provide heavier wall sec­ tions and clearance for a more sturdy rod We Bore ...... 800 have developed improved machining Stroke...... 715 techniques and now the crankshaft bore is step Dlsplscement...... 359 bored to provide a close fitting seal area forward of the carburetor and absolute concentricity with Weight...... 8 oz. the front beanng. The port section and aft is bored larger to provide shaft clearance. The problem RPM with combat prop...... 18.000 of heat sag which we had on some earlier Eagles has now been completely eliminated The new First introduced in the summer of 1976. this new Fox Combat crankcase also features bosses on the front and rear of the motor which make the muffler attach­ Special was an immediate success. It won first place at the ment easier We no longer install exhaust valves except on special order, as most people use a Amencan Nationals and the Canadian Nationals, and first places muffler which makes the exhaust valve unnecessary The crankcase is now bead blasted which we think at many contests throughout the country Whenever the Combat gives a very pleasing contrast to the polished head Special was flown it was obviously faster than the rest of the field. and rear cover and the black hardware. If you have A suction type restnctor and needle valve are included with the to work tor your money, you should take a long motor. This suction ventun makes the Combat Special a surpns- hard look at the Fox Eagle. ingly docile motor for beginner type profile airplanes As mod­ eler's skill progresses and he wants to go faster, he will be able to 16099 Fox Eagle for C.L...... $59.95 switch from the suction intake to bladder type and this way the 26099 Fox Eagle for R / C ...... 69.95 same motor will progress right along with the modeler from the 90232 Conventional Silencer...... 9.95 first profile model up through the fastest compeitition type combat FOX models. MANUFACTURING CO. 13700 Fox Combat Special ...... $49.95 5305 TOWSON AVE. FORT SMITH. ARK 72901 PHONE 501-646-1656 90412 W Prop Extension ...... 3.00 HOBBIES + Super Deadbeat $53.99 Windrifter 29.99 Windward 19.99 —Mail Order Only— Performer 21.99 Pierce Arrow 20.99

HOBBIES + Mailorder Service for: JACK S HOBBYCRAFTS Half-mile east of Colima, P.O. Box 1342 on Whittier Blvd., in the Whittier, Whittwood Center - (Next to Von's) California 90609 » OVER 25 YEARS IN WHITTIER « Whittier, California 90603 Phone (213) 947-1710 Write for our FU LL SER VICE Catalog - $3.00. Price refunded with order for $25.00 or more. 24-hour service on all orders. appear that went undetected during the towards one solid color for the entire that are really great for experimenting initial filling and sanding. These areas hull, with trim tape, lettering, and with weighting the hull. can be filled and the primered hull numbers used for contrast. There are The Excaliber II is not the best tunnel sanded with fine grit paper. The hull can certainly many things a builder can do available for racing in rough water or now be primered again and final sand­ with the finishing of the model to add windy days. The tunnel configuration is ing done in preparation for the applica­ realism to its appearance. designed for maximum lift on flat water. tion of the color coats. I personally lean RUNNING THE EXCALIBER II When the conditions get rough and After three years of working with this windy, driving the Excaliber II takes Í BROWN CO-2 ENGINES design, some things have become rather extra attention. ENGINES ARE IN STOCK NEW CHARGE« obvious on trimming the hull. The prop I believe the Excaliber II should be AND S SIZES OE TANKS BROWN ENGINES COMPLETE CATALOG SI.00 that has proven most successful is the a fairly easy boat to build for even a HARD TO FIND ACCESSORIES KITS. ANO J.G. E-20. This is available from J.G. beginner. If assembled properly, it PIANS FOR RUBBER POWERED MODElS p h Q N E <7141 4 6 9 -4 6 7 5 Products, 8030 Fordham Road, Los A n ­ should prove to be a competitive hull for Peck-Polymers geles, C A 90045, if you can’t find one at outboard tunnel racing. I would be your local hobby shop. Be sure to check interested in hearing any comments BOX 2498-MB LA MESA, CALIF 92041 J any prop for balance before running on from those who build the hull. You can the outboard. An out-of-balance prop send these comments to R/C Model will cause increased wear on the lower Builder and they will be forwarded to end bearing. me. Good luck with building the Excali­ The Excaliber II is designed to ride on ber II and welcome to model outboard the last few inches of the sponsons. Most tunnels! of the Excaliber ll’s in this area are P.S.: I realize that the proper spelling running with six to eight ounces of for King Arthur’s sword is Excalibur. weight up front to keep the bow down Dave Knowlen, designer of the original on windy days. The boat is very respon­ Excaliber, purposely misspelled the sive to changes in the prop depth and name. · å m changes in the angle of the engine under or away from the transom. Shim­ t C r n m r w ming the engine under the hull will F/F Nats .... Continued from page 53 cause the boat to ride wetter; shimming his knowledge. Guess that’s why I like 142 KITS · AVIATIO N LITERATURE the engine away from the transom will NEW CATALOG S1.25 * ACCESSORIES this part of modeling. lift the bow. The flight of Srull’s Vagabond was The only way to find the best ride is to really realistic; it would have a long MAJESTIC MODELS’·^ spend lots of time experimenting with takeoff, then slowly climb to the top of 3273 WEST 129 ST engine settings and weighting the hull. the auditorium, circle there for a while, CLEVELAND. OHIO 44111 Prather Products has stick-on lead strips then glide down. The Old Perfesser should have been there to see it, it would have brought tears to his eyes. Authorized- FA CTOR Y A UTHORIZED SER VICE Another great flier was Guy Larson’s FOR ALL OF THE FOLLOWING BRANDS Martin Baker. His model was designed I R a d i o and drawn by him, built and finished to a A ce· Cannon Cirrus EK Logictrol very high standard. This may seem to be a little unusual in a world of ARF models ( Q o n t r o l Pro Line* Math as* RS* Micro Avionics Royal Orbit 0 & D World Enginas in R/C, but the real kicker is that Guy is a Senior, not an Open flier! Guy also had a s e r v i c e Simprop K raft* Jo Mac Heinkel 119 Peanut that was scraping the •ALSO WARRANTY SERVICE ceiling from time to time, and which was also built to his fine standards. EXPERT SERVICE ON ALL BRANDS While we were testing our models, a local man named Perry Peterson came Don McCarthy · F°ctory trained technicians with over up to us to chat for a while. He makes ’ 15 years in Radio Control Electronics. rubber scale models, many from the R/C Model Builder centerfolds, and was saying that he was probably the only Hours: Closed Sun & Mon; Tues -10 am -8 pm; W ed-Fri · 10 am -6 pm; Sat · 10 am -2 pm scale free flighter in the area, and that all (714)639-8886 915 N. MAIN ST., ORANGE, CALIFORNIA 92667 the clubs were R/C. Bob and I had him write his name and address down for us.

104 R/C MODEL BUILDER and by the time the week was over, we had found four or five other local men with the same interest. We gave them Perry’s address and hope that they may SEA TIGER ENGINE start a Free Flight Scale club in Lincoln. Displacement t 34 cu m By the way, we asked Perry if he was Suggested Retail Price $129 95 $275 entered; he replied that he wasn’t, as he Sea Tiger is a water cooled. 1 34 cu m displacement engine (22cc) designed tor R/C thought his models were not up to the boating The engine is available either ignition or standards for the Nats. A few days later glow, and wiM run at RPM s ot 8.000 to 9.000 he showed us some photos of his Peanut ignition and 12.000 to 13.000 glow The engine features a large water cooled head 4 models; they were fantastic, and we roller bearings on the crankshalt and roller really got after him for not entering bearings on the steel con rod The engine them!! I wonder how many modelers comes with umversals. a rear exhaust pipe, designed to work with tuned pipe type muttlers. out there have the same feelings as and is available with manual pull start or electric Perry. Please enter a contest; if you don’t Aeromarine Enterprises Inc. starting with a Lectra Starter unit mstatled This makes the Sea Tiger engine great for the scale 709 Longboat Avenue place high, at least you can gather a lot of and sport models, and it is ideally suited for Beacnwood, N.J. 08722 good ideas for that next model, meet those large models Cat No 852-857 f201t 240-3882 other modelers, exchange plans, and Piitrlbutot and Dealer Inquiries Invited have a good time. While Bob and I were repairing a meant that we had to judge the same landing gear strut (will make a better model two or more times; in fact, we one for t ne next contest), a young, pretty judged some Laceys four times each! As new releases- reporter from the Lincoln Star, named these were Juniors, I can't blame them B iicker Kathy Chenault, interviewed us. Seems for doing this, as it’s hard enough for a she was doing the Nats story for the young guy to build one model, let alone JUNGMEISTER 11/2" radio control paper, and wanted to know about four, then trim each one out to boot!! scale Indoor Scale. Bob and I told her all we There were several models worth knew (took about ten minutes) and mention in this event. Don Srull's Water­ thanked her for the chance to do so. man Gosling Racer looked like a brand Next morning we saw our picture on the new racer just out of the hangar. It had a 33" wingspan, front page of the paper, along with a great deal of detail, right down to the .049 power, $1895 good plug for Free Flight Scale. Thanks, control wires for the ailerons, rudder, Kathy. and elevator. His Crosby racer in Peanut great for schoolyard scale Monday morning, due to my big was just as nice, and flew well too; so mouth, we judged the Outdoor Rubber much for saying that the low-wing TRAVEL AIR Scale models. Itseemed thatsome of the models can’t fly well! John Oldencamp * 6 0 0 0 ' contestants were confused on the regis­ had built a Japanese homebuilt (sorry, tration time and the scale entry time, 9 forgot to write the name down) that was a.m. and 10 a.m. respectively. This left good looking, a low-wing also. Think some of the contestants out of the this is a new trend starting?? There was 020 or rubber herb flukes official contest, so we had an unofficial also a Dayton Wright racer with retract p o w e r 36 span contest too; can’t keep a good modeler gear that was outstanding. 1-2 channel R/C or free flight. $14.95 down!! Also, we decided that we would Finished up the Outdoor Peanut have time to judge the Outdoor Peanuts judging Tuesday, entered our gas entries on the same day. This saved many of the for judging, and drove out to the free fliers the problem of being at the flying flight site near Mead. First thing I site 40 miles away at 8 a.m. and having noticed was TALL GRASS. I had always their Peanut models in for judging by 10 read about this stuff for testing models, a.m. at the scale judging area. Can you but as a native Southern Californian, had 23**wingi imagine trying to explain to a policeman never seen the real thing! It’s great stuff, U 1I for rubtx that you were driving over the speed causes far less damage than the asphalt available soon. C02 pow limit on a two-lane road just so you we use at Mile Square, but it’s hard to could enter that 13-inch wingspan SEE YOUR send 25$ for R.O.G. from. This was taken care of by DEALER NOW catalog model on the back seat for a contest? laying four sheets of plywood edge-to- The one thing that was tiresome was edge to form an 8x16-foot area. This was FLYLINE MODELS. INC. that some of the models were entered in fine for the short takeoff of the rubber- (MuiMCMimttn DO·· AVt NOf <· 4 (imirvxM Peanut, and in A M A Rubber also. This powered models, but not enough for DATE REC’D. SOCIETY OF ANTIQUE MODELERS

MEMBERSHIP APPLICATION NO. I hereby make application for individual membership in the Society of Antique Modelers. DO NOT W R ITE IN TH IS SPACE

NAME ______BIR TH D A TE ______YEARS MODELING

ADDRESS CITY STATE ZIP Please check if you belong to any of the following: Note: Membership includes 15% discount on one year M ODEL B U ILD E R Magazine subscription. Give S. A. M. No. when subscribing. A . M. A. NO. . Enclose Membership Dues of $10.00 and send to: Society of Antique Modelers Μ. E. C .A . NO.. 1947 Superior Avenue S. A. M. CH APTER NO. Whiting, Indiana 46394 In making this application for membership to the Society of Antique Modelers, I agree to abide by the rules set by the Society and realize that the goals of S. A. M. and the Old Timers movement are to encourage participation above competition and is dedicated to the preservation and reproduction of vintage model aircraft. ------.------Signed ------—.------

DECEMBER 1979 105 damage though. Larry Kruse had a C O 2 powered LWF Butterfly from volume XI CENTRAL AVIONICS of the Historical Aviation Album, by Paul (formerly Kraft Central) Matt. When I saw his flight I knew that 7843 Ramsgate Drive he was the man to beat. His takeoff was long and smooth, the climb slow (the Knoxville, TN 37919 full-sized plane had a two-cylinder engine), then it seemed to cruise around HIGH QUALITY — PROFESSIONAL REPAIR for at least a minute and transcend into a AND PREVENTIVE MAINTENANCE SERVICE FOR: nice landing approach. As it turned out, Larry got first place, and it was well KRAFT — TOWER — KSE — KGL — PCS deserved. Duke Horn had a diesel-powered Complete Parts and Replacements Inventory Kinner Sportster monoplane that sure Licensed and Certified Personnel was a beauty. It had some problems with Independently Owned and Operated spiraling in at first, but soon had an official flight in. Carl Millerwasthemost Carl Smith fun to watch; each time he would fly his Fast — Safe Sales — Service glow-powered Taylorcraft, he would UPS Shipping 615-693-8605 talk the plane around during flight. If it would do the wrong thing, he would yell at it, and sure enough, it would correct itself. Very realistic flier, smooth and slow. Bob Haight’s Bellanca must have heard that it got the highest static scale ELY E L M points, for it became a real prima donna, and its diesel engine would not put out enough power to fly well, or should I say VL-101 Electric propulsion system long enough. O ne of the sights I will shown— using Hytork 48 motor and always remember was the Bellanca planetary gear box, Si-3 switch & slowly passing over my head at about charging jack, and B-33L fast charge eight feet as if on its way to Berlin. ni-cad flight battery— total weight Guy Larson’s C O 2 powered Nieuport 2Vi oz.— will power models 25 to II flew very well; in fact,after Guy got his 50" wingspan weighing up to 10 oz. "A four officials in, he fun flew it for therest Send 50c for latest catalog showing V L PRODUCTS of the day. Tom Comparet was not as for­ full line equipment & accessories. Division of Vista Labs tunate; his A.S.L. Valkyrie canard didn’t Hobby dealers send for information. 7023-D Canoga Avenue want to take off from the road. In a last Canoga Park, California 91303 chance attempt, Tom tried to hand launch it, but it crashed and was dam­ aged beyond repair. As this was one of our gas-powered heavyweights, so I sure were putting the miles on the truck. my designs, I really felt bad. asked john Preston, the man in charge, if What fantastic luck, no wind!! Perry The N.A.S.A. (National Association of we could have something better for the Peterson said that we were lucky indeed, Scale Aeromodelers) had a special next day. lust say what you need, and as they only get about two or three days achievement award for both Open and Preston will get it! Next day we had a a year like this on the prairie. Did an Junior/Senior, in Free Flight Scale. Bob one-lane paved road! Many thanks, official hand launch to get on the board Haight got the Open award for the highest static points in a model that flew John!! Back to the rubber flying, the day and relieve the tension with the Stinson, (missed an official by 1.8 seconds). Tom was windy, about 10 to 15 mph, but this then tried to R.O.G. Had some trouble Comparet got the Junior/Senior award didn’t seem to bother the modelers, as here, as our models would seem to turn for the most difficult modeling subject. many good flights were seen. Carl into the grass at each side of the road Both of these persons well deserved to Miller, of Ventura, California, had some with each try. We decided it must be the get the awards. high flights with his Lanzo Puss Moth crown in the road. Did do an unofficial that were something to behold. R.O.G. with a little more up elevator, but Although the next two events are not Wednesday morning we picked up the flight looked terrible . .. stalled all scale. I thought you may be interested in our models and went back to Mead . . . over the sky and wound up in a tree, no them from the modeling standpoint. On FW1 The qualities that make a model a NATS winner are the same ones that Sunday sport-scale liters look for Exceptional appearance to start with, ol course The 1223 FW 190’s stark and sinister shape has always excited modelers But even more important are friendly flying qualities Our designs 2657 N E 188th Street Miami, Florida 33180 have always emphasized safety at low speeds, and the FW 190 has in henled the ability to fly from 80-90 mph right down to a near-hover for Telephone 935-1436 landing The wide-track gear makes it an ideal first "tail-dragger Kit features: Full-size plans showing radio and retracing gear installation Color schemes (and decals) (or THREE different FW 190's.Separate 16-page instruction booklet with cutaway diagrams and in-depth Hying hints Diecut and machined balsa, nylon fittings, formed wirecowl, canopy, etc Span 65". Area 730 Sq 4 to 6 channel. Engine 60

106 R/C MODEL BUILDER Friday, Free Flight Electric was flown. Jim McNiell ran this event and did a fine job ENGLAND'S FIN EST for of it. Being a scale modeler at heart, I AMERICAN MODELERS made a 020 Replica of Carl Goldberg's Valkyrie, minus the 1500 pieces in tne wing of the full-sized one. John Pond has the plan for this, and it’s fun to build 1/4-Scale and a good flier. I found that an Astro 02 105" Span fit just right in the nose of it, and also that ifWIA-204 AERONCA it had more than enough power for a CHAMPION good climb, the one thing that many of the other motors seemed to lack. Got $164.95 there a little late, about 9:30 a.m., and the wind was up to about 15 mph. Two Includes motor mount, tank, fliers had maxed two of their flights the MORE COMING!! and much hardware. A ll first thing in the morning when it was AVAILABLE FROM MANY LOCAL HOBBY DEALERS wood costruction. with die­ or Direct (outside California) if your dealer doesn't stock. cutting and sawing. F o r .6 0 calmer, so I had my work cut out for me. Add 5% handling and U.P. charge. No C.O.D. please. and larger engines. Had one good flight, next one hit a downer, then I maxed my last flight. As it California Hobby Dist. (Since 1935), 415 S. Palm Ave., Alhambra, CA 91803 turned out, I got a fourth place . . . not too bad for a beginner. Many of the pancakes in a hotel room. Mix batter, modelers commented on my using an pour on dresser, brown with hot electric Austin timer. Well, it’s the lightest thing I iron, turn, brown other side. Want RUBBER STRIP could find, and was very consistent (after waffles? After browning, place on floor FAI RUBBER: ENDORSED BY BEST I learned how to adjust it). and step on with golf shoes!! Hope to U.S. RUBBER FLIERS. MADE IN U.S. The other event was Embryo Endur­ see you all in Dayton next year!! SIZES: 1/4", 3/16", 1/8", 3/32", 1/16" ance, and was flown on Saturday. This INDOOR SCALE RESULTS 1mm THICK (.042). SPOOLED, was the windiest day of the week; the PEANUT GROSS WEIGHT 1 POUND. wind was blowing up to 30 mph. As Bob JUNIOR PRICE $10.00 PER SPOOL PPD. IN and I had offered our table for the 1) Melanie Sanford U.S. ADDITION ALSPOOLS, $9.50 R.O.G. requirement to Terry Rimert, 2) Stefanie Sanford NEW P IR ELLI who ran the event, we figured we had 3) Liz Sanford SIZES: 6mm, 5mm, 4mm BY 1mm. the edge; we had tested on it!!! Well, SENIOR PRICE: S14.00 PER HANK PPD IN there were many thoughts of the best 1) Guy Larson U.S. ADDITIONAL HANKS, $13.50 way to launch the models. First, there 2) Collin Dimaio SOLE U.S. DISTRIBUTOR AND was the traditional launch intothewind; 3) Glenn Anderson WORLD WIDE SALES. this was done with some luck by some, OPEN but not many. Then we tried to launch 1) Clarence Mather behind a haystack, but the turbulence 2) Don Srull R.O. BOX 3957 was bad and we hit a priest, the haystack, 3) Bob Willey TORRANCE. CA 90510 and other things. Found that the best A M A RUBBER system was to launch downwind. Then JUNIOR 2) Michael Gilbert came the other problem: chasing the 1) Melanie Sanford 3) Susan Brown model. We found that if you got a one- 2) Stefanie Sanford SENIOR minute max, you had to be prepared to 3) Liz Sanford 1) Tom Comparet run about a mile or more. Then one had SENIOR 2) Guy Larson to find a 50-square-inch wing model in 1) Guy Larson 3) Glenn Anderson tall grass, or worse yet, taller corn. To 2) Peter Brown make a long story short. Bob and I both 3) Tom Comparet OPEN lost our Peck-Polymer Prairie Birds on OPEN 1) William Rogers our last max flight. We thought it fitting 1) Dan Domina 2) Gregory Thomas that we left a Prairie Bird on the prairie, 2) Don Srull 3) Don Srull hope some kid finds it and has a ball with 3) Greg Thomas AMA RUBBER it. Charlie Sotich won the event, Bob OUTDOOR SCALE RESULTS JUNIOR Haight came in second, and I followed PEANUT 1) William Langley with third. The Juniors were, in order, JUNIOR 2) Carl Linstrum David Turgeon, Stefanie Sanford, and 1) Carl Linstrum 3) Susan Brown Mike Watson. Terry handed out some very fine trophies and an iron-on trans­ fer for our T-shirts that said "NFFS Do you know that almost UNOFFICIAL W INNER,” very nice. any modern glow engine I'd like to say a few things in general can be converted to ignit­ about the Nats. The most important is to ion R/C operation? We thank all those who made it possible. stock many sizes by differ­ Dick Carson, Rolfe Gregory, John Pres­ ent manufacturers, conver­ ton, Bill Knapp, Chuck Dial, and all the ted to ignition and availa­ many others who worked so hard and ble for immediate delivery. got little thanks for it. One girl by the We also can convert your name of Janet Wolfe, who worked at the favorite engine to ignition. food stand, seemed to be always run­ All Work guaranteed to ning for more food, driving or loading meet your satisfaction. the truck, or helping Ruth Degarmo Complete line of ignition serve the food. Sure could have used that energy while chasing my models! accessories stocked at all Saw Johnny Clemens there, who told me times. he was writing a cookbook. He let me in 77 PRO DU CTS 17119 S. HARVARD BLVD. GARDENA, CA 90247 on one of the recipes: how to make

DECEMBER 1979 107 control surfaces in about a half hour and still maintain extremely good accuracy. SAIL CONTROL WINCHES If this isn't enough, I still seal the bottom of the control surfaces with tape, as in Fig. 6. Believe me, this is worth doing. You’re probably saying that this is great for a high-performance pattern ship, but why bother on my slow trainer airplane. Take my word for it, it does make a difference, and the difference will surprise you by requiring less con­ trol surface throw and results in more predictable, smooth controls. As this is being written I am preparing W-1 . . . $59.00 W-2 . . . $119.00 to leave next week for South Africa for • Custom R/C design for all boat sizes »Power - 40 in. lbs. «Travel the World R/C Aerobatic Champion­ time - 5 seconds »Voltage - 4.8-6 (W-1) »Size -2x2x5 inches. ships, and am also starting to campaign for A M A VP for District III. There has The Probar W-1 is mechanically operated by a separate, neutralizing been much discussion lately in all the servo. The Probar Propo W-2 is designed to plug directly into the receiver, magazines on the AM A. I’d like to say and requires no extra batteries. Specify Kraft, Futaba, or no connector. that we need good officers within the Both winches are fully assembled and tested, ready to install. A H mounting A M A for the next few turbulent years, hardware, switch pushrod (W-1 only), and winch arm blank are supplied. and this is up to you. If you don’t vote, STAINLESS STEEL HARDWARE: MISCELLANEOUS ITEMS: you have no right to complain later. Turnbuckles. Chainplates, Goosenecks, Sheet exit guides, 3owsie, Whatever district you reside in, please Boom vang pivots, Pad eyes, Tangs, Rudder posts. Mast head vote and end the general apathy among Deck cleats, Boom cleats, Rigging wire, fitting. Dacron sheet line. AM A members. Keep in mind that it is Dealer inquiries invited. NO T necessary to send in your renewal PROBAR DESIGN P.O. BOX 639 ESCONDIDO, CA. 92025 at the same time as your ballot, so send in the ballot the day it comes! SENIOR Next month’scolumn will probably be 1) Tom Comparet CUSTOM TUNED ENGINES written on a 747 somewhere between 2) Peter Brown Johannesburg and New York, and I’ll let OPEN AND COMPETITION you know how the team made out. · 1) Don Srull ACCESSORIES 2) Larry Kruse Specialists in standard Sailing...... Continued from page 46 3) Ron Roberti CAS, JUNIOR or throttled Cox .049/. 051 racing, double boat duels usually benefit 1) Liz Sanford and Rossi .IS anginas, the other boats more than the duelists. I 2) Melanie Sanford parts Λ quality racing products. always encourage others to engage in 3) Stefanie Sanford For detailed information, luffing matches and backwinding. While they are taking part in such activities I SENIOR sa nd 15 c stam p toe 1) Guy Larson can take advantage of a wind shift or OPEN Kustom Kraftsmanship clear air. They will slow each other, 1) Larry Kruse leaving me free to make significant 2) William Stroman P.O. Box 2699 gains. 3) Carl Miller Laguna Hills, CA 92653 LIGHT AIR SAILING (714) 830-5162 Every now and then, one gets to a regatta and finds no wind. Knowing how your boat will behave in such a situation Instructor. . . . Continued from page!5 control surface in as tight as possible and will pay off. I recommend patience, as shown in Fig. 5. taping them until the glue hardens. conservation of momentum, and stand­ I glue (epoxy) the hinges into the This may seem like a lot of work to ing next to a smoker. The latter will control surfaces first, putting the pivot some of our readers, but the jigs are provide you with valuable information point exactly on the apex of the bevel. reusable many times, and once made on what little air movement may be When this has set up completely I epoxy this system is extremely fast. I have happening. This is especially crucial if them into the other half, pushing the found that I can bevel an entire set of the wind is not making any ripples on the water. HINGE PIN OR FLEX-SECTION Light air sailing is dominated by the psychology and attitude of the skipper. If you have prepared your boat and believe it to be fast in light conditions, it will be fast. Conversely, if you’re sure that your boat can't handle the soft ' breezes, then you are doomed from the \ ------^ ^ IG . 5 start. I keep reminding myself that the trophies for the light air days are just as tall and just as shiny! If there is any difference, it is in the sense of accom­ plishment that comes after a day of intense concentration. Boat preparation starts with the choice of gear to be installed. If you will be faced with light airs, a proportional winch is a good choice. This gear will allow you to know the position of your booms when the boat is becalmed

108 R/C M O D E L B U IL D E R offshore, waiting for a puff. You can set the booms so the sails will produce drive from each errant puff ... if you know ANNOUNCING The OCTURA CONNECTIONI-the which way you want to go and have Feat Staap Climb FLal Slow Qjld· guessed right where the puff is going to come from!! Sails should be set flatter than normal, in an effort to keep the low KE*HEX speed flow attached to the sail so that it For tha n·« P 30 claea \N v ^ FLEXIBLE SHAFT COUPLER will produce useful thrust. In a way, we Haro la a modal óealgnmd tha novic· In mind and haa tha ------\ might say that too much camber or draft potantlal to win In tha toughaat comp^ltlon^ in a sail will try to change the wind’s ” ,ae' edf nHousPinTad" d direction too much. The inertia of the air THE POT ENT-30 Collel would prefer to continue moving in a Dalaxa kit faaturaa include straight line and will break away from Rolled balaa fuselage and wina mount with d4. Completed prop and noaa plugtail plug A ruddar the leeward side of the sail if we try to Precut wing riba.eper notches Job rated balaa atrip· Highast quality nsaua lubad eontaat rubber bend it too much. Detailed inatructiona flying tip· to help you wial When flattening the sails, do not haul CAT NO R2 66.95 PLUS 61.00 P AP check or money order to CHAS. WERLE on the luff excessively. Too much luff 3620 MORSE AVE NO· SACTO. CALIF. 99S21 tension will haul the draft too far for­

ward in the sail and increase the camber e x p l o d e d ASSEMBLED near the leading edge to a too tight fittings and swivels with sewing machine radius. Generalities are hard to give for oil. the vang. In still water I favor no vang at On the water remember the following: only $4§5 assem all, since the gooseneck will swivel much • Minimize rudder movement; steer assembly (including one collet) easier. In a chop, some experts tighten with the trim lever if you can. Additional Collets: $1.25 ea. the vang and try to get the leech of the • When starting, stay close to the line. Keep to windward if the wind is variable The Octura Flex-Hex Coupling for flexible sail to flop as the boat rolls and pitches. shafts uses an interchangeable collel. Whether this ooches the boat forward or to keep from getting blown away from (available for .250. .187, .150 or 135 not will have to be determined by some the line. diameter cable) to hold the cable securely practice with your boat on the water. • Ballast the boat slightly bow down to without fraying the end as with set screw There are not too many sites that I'm decrease wetted surface by lifting the connectors. Available to lit y„-24. V.-28, familiar with that have waves left when afterbody out of the water. 7mm or 6mm threaded crankshafts. When ordering specify thread and collet sizes the wind dies. Newport. Rhode Island, • D O N 'T PINCH!!! Keep the boat mov­ Order directly only il no! available at your local hobby off Fort Adams is one place. ing at any cost. Pinching can actually dealer — add 1 0 % lor postage Illinois residents add increase the slippage to leeward and additional 5 % tor sales tax Set the sheets to allow the slot to be Sena 50t for catalog and price list to plenty wide. In very light airs, one reduce the distance made good to OCTURA MODELS, INC. should really try to close the reach to weather. Celebrating our 25th year'" allow boat speed to increase the appar­ • When tacking, coast up to windward L 7351 N. Hamlin Ave · Skokie, IL 60076 ent wind. In no case should the boat more than you would on a breezy day. have the boom and club strapped in. If With light breezes, the boat will carry potentially boring, take the opportunity the class rules allow it, light air days are well up into the eye of the wind with to write down all the adjustments you good candidates for a jib twitcher. This is little flogging. Any distance made good finally choose. Next time, you can set up a pair of lines from a heavy-duty servo to weather is money in the bank. Never­ your boat “by the book” and just do a that exit the deck a couple of inches on theless, tack as few times as you can. The little tweaking between heats to maxi­ either side of the jib swivel and are then amount of rudder required to turn the mize its performance. tied off at the front of the jib club. boat slows it substantially. Every bit of I am now operating out of our new Hauling on one will swing the jib out and boat speed should be hoarded like King location and will field questions accom­ hold it out. Remember that the club is M idas’ gold. panied by a stamped, self-addressed being forced toward the centerline of A last word of good advice: if you go envelope sent to Rod Carr, 4115 172nd the boat by the upward tension in the jib to the lake on purpose when there isn’t Ave. N.E., Redmond, W A 98052. stay. Backstay tension should be at an any wind and practice, you’ll learn a lot The American Model Yachting Asso­ absolute minimum to unload the jibstay about handling your particular boat. ciation continues to serve the needs of as much as possible. In very light air, the Those skippers who wait to do their the skippers across all 50 states. The wind w on’t wing the jib for you, but the research on regatta day are inevitably annual dues of $10 are well worth the 4 twitcher will. Then you can take advan­ doomed to learn their lessons too late to Quarterly Newsletters which arrive on tage of the drive of all your square finish in the top half of the fleet. Since your doorstep full of the latest regatta inches. Minimize all friction by oiling light air practice is so low key and results, new rules for class members to

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DECEMBER 1979 109 vote on, technical articles, and many finish tends to be more resilient and has special interest columns such as Honest a bit of sheen. I have noticed, after many Ahab’s used boat listing. Send your years of using the Floquil/nitrate dope check to the A M Y A Secretary, 7013 Ans- finish on all of my scale models, that the GOTCHA, borough Dr., Citrus Heights, C A 95610. · tissue tends to be brittle. With the Gotcha! addition of the Crystal Coat, I think you F/F Scale . . . Continued from page 51 will find this not to be the case. .004" nnr' I have been asked how much paint to making the tissue tangent with some of add to how much dope, and now I get the verticals and diagonals. This is not the same questions with the Crystal only frustrating, it looksterrible! Ideally, Coat. For one thing, I have my wife save the tissue should be tangent only at the all of the jars that food comes in. M y corners. This, of course, is a bit difficult favorite is baby food jars, because I to do. With longerons of 1/16square it is seldom have to use any more material almost unnecessary to worry about, but than these will hold. So, if you know if you don’t want the tissue to attach to anyone with a baby in the house, you the vertical members, here’s what to do. might ask them to save you the jars. Any place that you suspect that the That’s how I get mine. If I’m using a color tissue will want to lay but shouldn’t, take that Floquil doesn't already have, such as a candle and rub it on the areas where that used on military type aircraft, I'll get With two separate filters — one you don't want the tissue to attach. Very a shade of Floquil that comes close, then finer than the other — inside each simple but effective. Another area mix until I get the shade I want. Usually Sullivan Crap Trap, you have a true where this works well is around the wing the total volume is equal toone bottle of filter system working for you. Larger tips. For the best appearance, the tissue Floquil. I'll pour this into a baby food jar. particles are trapped out of the way should be tangent only at the tip’s very I ’ll then add about one half bottle of the in the corners of the front filter and edge. If the longerons are 1/8-inch or Crystal Coat. If non-tautening nitrate smaller particles fall into a similar larger, I would recommend chamfering dope is used, this is the time to add TCP trap at the rear filter. And you can the corners and adding 1 / 1 6 square (tricresyl phosphate) for the plasticizer. stock, rounding off the corners. This watch it work in its see-through, This mixture is then stirred thoroughly. gives the covering a very high quality. The clear nitrate dope is added so that heat resistant Teflon barrel. Never Again, with a little awareness, you can the total volume is just a bit over half the trust your valuable model to an or­ do wonders with your covering tech­ size of the jar. Thinner is added to bring dinary filter again. niques. the mix up to spraying consistency. Don't forget to strain the paint before Only $ 1 . 1 5 When it comes to repairing tissue that has been ripped or torn, there are some spraying. easy ways to mend the covering without If you don't need that much volume, having to recover the whole surface. cut it down proportionally. Floquil in Let's say that in the middle of a wing this form lasts for many years. The (where else?) you have a nice hole addition of a bit of thinner on occasion IJ-2 where you cannot piece the tissue back will keep this product for a long time. It together. The easiest way to repair it is to is always best to keep leftover paint in a take a very sharp razor blade and cut a container that will just hold that amount. hole as round as you possibly can make The less air space there is in the jar, the it. (I realize that sounds funny, since we longer the paint will last. consider most holes as being round, but One last comment: Label the bottles. I GRAB HOLD I think you get the drift.) Now cut a piece always tell myself that I can't possibly Sullivan Insta-Just Plastic Con- of tissue round in shape that is just a bit forget what color I have just mixed. troline Handles feel good in the larger than the hole you are trying to fix. Unfortunately, this is not the case. It only hand and can be adjusted quick and Attach it by using thinner, then clear takes a minute to write down what color it is and for what airplane it was used on. easy. IJ-2 is especially suitable for dope. I have found that this method works much better than trying to cut By the way, I use lacquer thinner for the V2-A but will fit most sizes. Grab hold solvent. I will, on the other hand, use of one and shake hands with the away whole sections at a time, such as the space between two ribs, etc. Floquil’s Dio-Sol solvent when I'm using clouds. If there is a small tear or even a fairly only Floquil paint without the addition of nitrate dope. · Only $ 1 ,9 5 long rip, I choose to make the repair by using white glue. Take a small brush and place a fine bead of white glue on the Plug Sparks . . Continued from page 40 tear. If the edges of the tissue will not lay flat, take some drafting tape (a tape that crazy, and best of all, are quite crash- will not tear tissue when removing) to able. In other words, they don’t break as hold the torn edges down. In this case, easily as their big brothers! Generally put just a bit of glue on the torn portion, takes straight maxes to win this event, not under the tape. Remove the tape and this day was no exception. GLOW PLUG KLIP down the line and apply more glue until VICTORY BANQUET Fully assembled and unbreakable. Strain the whole tear has been glued. The glue This is something started back in 1964 relief feature ends broken wire problem. causes enough shrink that the tear looks by John Pond and Jerry Burk at the Dallas Free replacement if this Glow Plug Klip pretty good. NAS. This being the 16th Annual Old ever breaks. One more item regarding covering. Timer Reunion Banquet, some com­ Floquil makes a product called “Crystal ments should be made. WARNING! To All Modelers: Do Not fly Coat.” This is a clear, fairly thick sub­ Actually, no S A M business is ever run near overhead power lines. stance that is used over the normal at these get-togethers. After all, we Floquil paints to give a very high gloss to came to have fun. Generally, the pro­ the finish. For the most part, most of us gram features speakers, awards, and CUV would not want or need to have this kind whenever possible, films of bygone ^PRODUCTS. INC of finish on a scale model. However, by Nationals. This year had the 1952 Dallas P 0 Bo* C. 5Ä Da*itvill· Rd . Willow G«o«» Ρ» 19090 using Crystal Coat mixed with the Flo­ Nats (in color!). quil paint and clear nitrate dope, the Well, you’ve waited long enough.

110 R/C MODEL BUILDER Here are the results as based on the trophies handed out by Carl Hatrak. W EDNESDAY, AUGUST 1: R/C O.T. CLASS AB 1) Bill Bowen (Playboy)...... 10:33 2) Ron Hess ...... 5:36 3) Fred W ilk e ...... ·. 4:09 CLASS C 1) Olie Olson (Playboy)...... 17:49 2) Paul Smith (Playboy)...... 15:05 3) Charles Tvdrik (Bombshell) ... 11:42 TEXACO 1) Ed Smith (Cloud Cruiser)...... 20:10 2) Jim Root (Cavalier)...... 13:31 3) Mit Grimes (Quaker)...... 5:18 THURSDAY, AUGUST 2: O.T. C/L STUNT G LOW 1) Lou Wolgast (Smoothie)...... 261 2) Jim Renkar (Stuntwagon)...... 223 n r λ I IC Μ Τ scale accessories 3) Doug Dahlke (Warrior)...... 221 STUNT IGNITION rVIl/lLIO IVI· BY WILLIAMS BROTHERS 1) John Pond (Super Zilch)...... 98 RADIO CONTROL SCALE PILOTS · SCALE WHEELS FRIDAY, AUGUST 3: O.T. F/F CONTROL-LINE CYLINDERS ■ ENGINE KITS · MACHINE GUN KITS CLASS A GAS FREE-FLIGHT PLASTIC DISPLAY MODELS 1) Gene Lapansie (American Ace) 3:40 CLASS B GAS SEND SO

DECEMBER 1979 111 Modelers would do well to pay attention λ** F-4 PHANTOM ViA Sport Scale to the above. FLORIDA FLASHES SPECIFICATIONS Soen 30 o Terry Rimert reports the Rebel Rally Area 241 sq n We^re 19 22 0/ enjoyed terrific weather, warm with Engine 049 10 Rad« 2-5 Channe* little or no wind. Hot dog! Terry says they also have their "trash movers” without the benefit of dust. One came along and all the registration BLUE ANGEL cards maxed along with the paper cups SPECIAL FEATURES KIT #104 from the concession stand garbage cans. 1 preas&emMeO Soper deiaJed tutelagespon *c«w wen THUNDERBIRD 2 Tough light sheet loam »mg He thinks this one outdid anything in 3 Highly detailed clear canopy KIT #105 4 Easily accepts v»A retracts Taft, even if it is over swamps. 5 Predrilled alum»v#n motor mourJ 6 Senpte. quck construction The Atlanta boys, headed up by There's not another VjA sport scale 7 Conventional elevator ο» WMxietcv construction George Perryman, enjoyed their usual kit that even comes close. Quick, Θ Detailed phuto msťucton oooMet responsive and stable, it has a flat “benefit contest” by taking all rubber steady sink-rate on approach With "See your nearest hobby shop first.'' places, except for Ron Sharpton who retracts and throttle it brings tet-like For our full line brochure, write: realism to schoolyard scale Model Merchant, P.O. Box 3792, Irving.TX 75061 snuck in for a second in Mulvihill. Terry opines they make better rubber in Atlanta. Gotta be some reason! way to take care of the heat! ORIGINAL IGNITION As usual, the .020 Replica event had Entries were down to eleven in each 1) Bruce Norm an...... 864 the biggest entry, with Walt Rozelle event, as the winds did deter quite a few 2) Dick H u a n g ...... 265 nosing out Al Wright and Tom Mc­ fellows. Helmer sez they weren’t "chick­ 3) Edd Alexander...... 260 Laughlin. In Old Timer Gas, McLaughlin en” but just plain smart for not flying. Helmer Johnson concludes his write­ was unbeatable, although Frank Carney The meet, held at Benbrook Lake, a "tad up by pointing out what he said on his made it close. John Hemphill placed southwest” of Fort Worth, shows the contest notice. We excerpt the follow­ third. following results: ing: "You will betimingwhen not flying, O ur hero, Terry Rimert, again looped ANTIQUE so be sure to bring a watch. If you do not his Playboy. (Note on Playboys to Terry: 1) Bruce Norman...... 1004 own one, buy one now so you will know Playboys as built have entirely too much 2) Edd Alexander...... 954 how to use it. Borrowing a watch and not wing incidence. Drop the front of the 3) Richard G re e r...... 807 knowing how to read it isn’t fair to the platform a good 1/8-inch and then O LD TIMER fellow you are timing. Please get a timer watch it go!) Anyway, Terry ruined his 1) Ted White ...... 1186 before you go to fly. D on ’t go to the line McCoy .49, bending the crankshaft 2) Edd Alexander...... 766 and yell Ί want a timer.’ ” housing. He inadvertently left the hous­ 3) Dick H u a n g ...... 612 Sage words that could fit any contest! ing on the stove and forgot it for ten minutes. When it cooled off, he found the housing had stress relieved itself and YES-SIR, YES-SIR, THREE BAGS FULL I was again straight I Terry sez anyone with a bent aluminum housing should give it a try on an electric stove. It might not work every time, but what have you got to lose? 1980 SAM WEST COAST R/C O.T. CHAMPS Great news! As we go to press, the columnist has just received a letter from WALT MOONEY NOW OFFERS 3 BAGS OF PEANUT SCALE PLANS Jim Adams, Western SAM Vice Presi­ ALL WELL TESTED 0ESI0NS, AT ONLY tS.OO EACH dent, who has officially OK ed the holding of the Western SA M R/C O.T. EACH BAG FEATURES FOURTEEN PEANUT PLANS, Champs at Sacramento over the M em o­ ONE OTHER, PLUS PHOTOS AND INFORMATION rial Day holiday. The host club will be SEND tl.00 FOR COMPLETE LISTING ANO SAMPLE PLAN TO: S A M 30, and the site will be that in­ comparable dichondra field located 10 WALT MOONEY, 2 f 12 CASRILLO MESA OR miles southwest of Sacramento. SAN OlEOO, CALIFORNIA » 2 123 Held over three days, this will give some of the boys at the U.S. F/F Champs a chance to come up on Monday and fly the very popular R/C Texaco event. MAMMOTH BARKLEY TRAINER D on ’t miss this great contest that comes STINSON VOYAGER only once a year! THE WRAP-UP ONE QUARTER SCALE In reading the SCIF newsletter, The Flightplug, as so ably edited and written by Ken Sýkora, the columnist spotted some humor that was worth passing on. “At the June SCIF meeting, Bill Krecek recently found a pile of dirt and green mould at an engine swap meet. He Wing Span - 56" brought to the meeting restored like Engine Size - .19 ■ .35 Ontario Residents Add 7% PST All Balsa Ply & Hardwood Construction new (Krecek is a craftsman!) a real DEALERS INQUIRIES Detailed Plans and Instruction Booklet monster of an engine, looking likesome WELCOME early engine casting kit, or maybe just a shop project (home-built). A boat en­ Wing Span · 101.75” 1+1 J’5 ENTERPRISES 1+1 Designed for Quadra Engines gine? All eyes turned to the engine P.O. Box 82 Belmont, Ont. Plywood & Softwood Construction Canada NOL 1B0 collector expert, Bruce Chandler. Bruce Kit by Art Lane 1-519*444)375 lifted it up from the table, using both

112 R/C MODEL BUILDER hands. Suddenly he set it down, grabbed at his abdomen and immediately identi­ fied the engine as a 1932 late model ‘Hernia 49.’ ’’ M orn darn fun! · The Pipeline R/C World . . . Continued from page 1 7 ip e iia lliin f m filling the rveerf· mf Λ/C he· sure did miss these guys. P.0. BOX 1SM, FBEM0MT, CA »4M l Monday, July 30, was the first day of qualifying. The Quarter Midget racers A Complete Une of Boets, Hardwire had the morning (8-12) and we were to begin at 1 p.m. Betty Stream, our cate­ A Accessories from the Leading gory director, and Bill Seidler, our event Manufacturers director, were out early trying to get us set up, but the Quarter Midget guys had Also. Custom 1/12 gotten a late start and so were late finishing. There were two circles ap­ Scale Electric Car Parts. proximately 2000 feet apart, with two CATALOGUE S i.00 flight lines per circle ... a grand total of four flight lines going at once. There were two lines of 34 fliers and two with 36, and each line had three USP) A judges plus a timer. The circles were set in the JOHN POND middle of the large taxi ramp I spoke of before; 300 feet to the rear of us was A M A headquarters and the fire station Old Time Plan Service (the fire station required a 250-foot fire lane in front). In front of us was 300 more The largest selection of plans in the world at the most feet of ramp, then a grass area with two reasonable prices. Each list 75c single-story cement block buildings and a small tower, then approximately 1500 No. 10 OLD TIMER F/F GAS feet in front was the full-scale runway, No. 10 OLD TIMER RUBBER/TOWLINE where everything from F-4's to 737’s were active. When I expressed concern No. 10 OLD TIMER FLYIN G SCALE A through K over the closeness of the full-scale No. 10 OLD TIMER FLYIN G SCALE L through Z traffic, I was told there was plenty of room, especially if the fliers stuck to the P.O.Box 3215 300 foot distance rule (actually the San Jose, Calif. 95156 rulebook says the optimum distance out is approximately 300 feet; it does not put Phone (408) 292-3382 any definite limit on this, and even if it did, it would be impossible to judge). We finally started flying at 1:40 p.m., and department’s fire lane rule; moving to grumbled about the site (justifiably, I things seemed to be going well if you either side would gain us nothing, as we feel), but because they all came to fly discounted an occasional model seen to were parallel all the way with the active they did their best to comply with the disappear momentarily behind a land­ runway. Dick Sonheim, who was the new rules and in most cases succeeded. ing full-scale airplane. We had been category manager, finally held a meet­ The maneuvers were brought in and to flying approximately one-half hour ing with the pilots and gave them these me appeared too close, especially the when we were suddenly told to land all rules: the edge of the grass strip (ap­ Figure M's, loops, etc. It was especially models, as the FAA was shutting us down proximately 300 feet out) was the limit hard on less experienced pilots, as they for violating itsairspace(!)and we would on distance out to fly, and any infraction were so aware of the outer limits and not be allowed to fly again until this was of this would result in 1) first crossover, a tried so hard to avoid it that they got too corrected. It seems that many of our warning issued; 2) second crossover close in and were called for the usual fliers were doing their patterns directly would result in a call down and a zero zero line, which is behind the judges’ over the active runway. Well, that put flight from there on. Continued disre­ area. Actually I felt a bit more compas­ everyone in a hard place; we couldn’t gard of this rule would result in per­ sion on the part of the judges and move further back because of the fire manent shutdown by the FAA. The fliers officials was in order, as on at least two

DECEMBER 1979 113 f * IB Very frustrating!! EXACT MINIATURES We did finish the second complete NEW V-3 SIZE SCALE SHIP ACCESSORIES round and got over half the third round TEAK-8cMOHOGANY finished. Individual fliers were begin­ ning to emerge . . . Tim Just and Scott SPARK PLUGS ST RAPING Murray were flying high in Novice, Brian ANTENNA BRAci^TTAS&EMBLY Crossley and Roy Speights doing very well in Advanced. Expert was a horse NGK 1/4x32 ME8 .3-BLADE PROPS race from day one through the finals, particularly between Cliff Hiatt, Dave SHAFTING Wilson, Dave Doucey, and Mark Dou- > * PROPS TOj^ťCÍÁL ÖTTDER cey. Masters was led by Dave Brown with Dean Koger in close second. There were a couple of surprises; Joe Gross was Dealer Inquiries Invited flying the best I’ve seen him, as was Chuck Shade. Joe Bridi was again flying PRICE LIST-- B0X 402 well (this is a new Joe; I haven’tseen him 50 cm. OXFORD. MD. crash in ages . . . amazing how much t * ______21654 a higher you place when your airplane remains intact! Sorry, Joe, I couldn’t round, and even began a second. Flying resist). $4.95 e a . stopped at 8 p.m. Wednesday was the same weather, Tuesday (second qualifying day) was Plus 50i postage same conditions... for variety we had a sunny and hot, with a bit more wind than full-scale pilot after a thrill as he landed California residents add 6% Monday. This was to be the weather all on our taxiway, taxied full length and week; winds varying from 5 to 25 mph. parked it just to the right of the right The sun was nearly always bright, and hand circle, out near the grass strip. except for one morning, very hot. It was Believe me, he gave the four pilots in the especially bad on the runway, as the air at that timea real thrill. When asked if cement bounced all the heat back up, he didn’t see all the activity and planes, and I’d be very surprised if we didn’t hit he said, "O h yes, but I figured they’d stay 110° plus a few times. Pity the judges and out of my way!” (Heaven help usall from line crews! STUPID pilots of all kinds!) Anyway, he Tuesday also brought us another couldn’t be persuaded into moving his problem, that of the Air National Guard. plane from our taxiway, so we were 14600 RAMSTAD DRIVE Seems they fly these F-4 Phantoms every instructed to “not fly over him.” What with zero lines behind us and in front of SAN JOSE, CA. 95127 day. Very loud, these creatures, also very disconcerting if they happen to be us and now not flying over this guy, it taking off in the middle of your nice became a real challenge trying to figure occasions I saw a pilot go over the outer smooth eight-point roll! After the first out where to fly!! marker and be warned, only to become few we all wised up considerably and the The gentleman finally did come back nervous and get the very next maneuver callers would warn a pilot of a jet takeoff and move his airplane, and as things go it in “too close to be recognized” and so he could compose the thumbs. By far wasn’t but a few minutes later that we zeroed for that! On neither occasion the larger problem was that we were had a mid-air and one plane hit the was the pilot in a dangerous situation taking off from right to left and so were ground very close to where that full- (my judgment) and I think he should they, but that meant they were using the scale ship had been. The mid-air was have been allowed the benefit of the far right end of our taxi ramp to do just between Mark Doucey, who was at that situation. that . . . taxi out for their takeoff run. time fourth in Expert, and Bailey Reese, Flying began again after approximate­ They were taxiing out approximately 200 who was tenth in Novice. Mark’s plane ly an hour's delay. The pilots were very feet to the right of the right hand circle was the one trying to smash holes in the careful, and takeoffs and landings and were turning away from us but were runway. He ended up with lots of balsa seemed to pose the biggest problems. still on our taxiway. I would say we had pieces. Bailey’s Curare ended up land­ Takeoffs were worst, because the three approximately ten of these a day, usually ing minus a chunk of wing and one lower classes were required to do a 90° in groups of two. And each time we were aileron. It will live to fly again with some turn before calling complete, which of warned and had to shut down our flying, work. It is a shame, though, as neither course headed them directly into the or if they weren’t seen in time we had to pilot ended up making the finals, and area the officials demanded we not go! break out of our pattern and fly else­ before that happened each was most We did manage to get in one complete where until they cleared our runway. definitely a contender (neither had a backup plane, although each borrowed one and kept trying). We did manage to complete round three, fly a full round four, and begin a round five . . . this was mainly because we started almost on time and had no major shutdowns. Thursday was the final qualifying rounds. We ended up getting six full rounds for everybody. The flying had gotten much better through the week. For example, Jim Vanderbeck (NSRCA prez), a first-time Nats flier in the Expert class, claimed his first round flight was among the worst he has ever flown. "I was so nervous . . . everything was shaking The problem was that nothing was in unison!” Nerves are not reserved for the lower class members. The best get nervous enough to be glad when the

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Cover 3 Hobbies + ...... 104 Pica Models...... 106 77 Products...... 107 Hobby Horn...... 84 Pierce Aero Co...... 109 HOUSE ADS Hobby Shack...... 89 Pipeline, T he...... 113 Classifieds ...... 115 HOO, Inc...... 111 Polk's Hobbies...... 101 Plans Service...... 116 first flight is over. As I mentioned, flying amount of excitement was made by announcing, “I have a problem." We was better today. The aforementioned Dave Brown, who lost an aileron servo (Dave flying, me praying) spent five lim V. was fourteenth Thursday, yet he just as he began his eight-point roll. minutes trying to save that plane. It had qualified eighth. The top ten in all Being a very calm, unnervous person quit with just a bit of left aileron and the classes flip-flopped around faster than myself. I could only think he had a wind didn’t help, plus that large rudder the F-4’s took off! There were even some monumental brain-lock as he called his on the Tiporare isn't at all effective in ties, and in Novice a tie for tenth. And eight-point and proceeded to do a rolling the beast. Our model decided more than one pilot suggested “just one beautiful straight and level flight. He that knife-edge was a great way to fly, more round," hoping for more juggling. flew way past himself before quietly the only problem being that knife-edge The judging was such that on the first four rounds, everyone had equal expo­ sure to the judges, then on the fifth and sixth rounds they juggled the sets some­ CLASSIFIED AOS what, so equal exposure was of course Non-commercial (personal items) Rate is 25 cents per word wan a minimum of S3 00 impossible. Commercial Rate is 40 cents per word, with a minimum of SS 00 No mail-order discount There was some problem with judging house ads knowingly accepted No advertising agency discounts allowed (an annual event!), and with the jug­ All ads are payable with order, and may be for any consecutive insertion penoo specified gling, two of the most inconsistent Name and address free phone number counts as two words Send ad and payment to judges ended up on the same line. This MODEL BUILDER Magazine. Classified Ads. 62' West i9thSt Costa Mesa CA 92627 was very hard on the guys who had to fly for them and still try to gain on guys who W ANTED Old-Time spark-ignition model W ANTED Old model airplane engines, gas didn’t. But the scores tell all, and for this airplane motors magazines and gas powered model race cars, kits magazines parts, Nats the highest three scores were race cars ol the 1930's and 1940 s Russell related items. 1935-55 Arthur Suhr W218 counted for everyone, and the top ten Stokes Rl 1 Box 73J Keller TX 76248 N5866 Maclynn Court. Menomonee Falls. Wl from each class went on into the finals. 53051 HELP Old spark ignition & diesel engines For qualifying, a shortened pattern was needed in good running shape for antique KEVLAR 49 FABRICS Alsoglassandgraphite used for all classes, but the finals was full model flying events Brown Junior Super fabrics available For price list and info, send pattern for all classes with the Masters Cyclone. O&R 60. any twins especially Parts to: Hi-Pro-Form Fabrics. 962 Devon Drive using schedule C, where each flier needed Atwood Champion & Merlin B points Newark, DE 19711 chooses his own pattern under certain assemblies Call or write Ron Falk. 5265 WANTED: Two rolls 2" scale Coverite camou­ rules. Friday and Saturday were finals Gaylord Dr San Diego CA 92117 714' 272-3783 (SAM »1716) Society Antique flage covering Write Robert Frantz. 1201 5th days, and we flew from 2-5 p.m. each Modelers St.. New Brighton. PA 15066. or call collect day. The set-up was similar . . . two (412) 843-9717 circles, four flight lines, three judges per FOR SALE Flying Aces and Air Trails m aga­ line. There were ten pilots per line G LA SS CLOTH 0 6 oz . finest woven quality zines. 1936 to 1950 Send for list Bruce 38” wide, continuous length 5 yds Si 3 95:10 (separated by frequency, not class) and Thompson 328 St Germain A v e . Toronto yds $24 95 Dan Parsons. 11809 Fulmer NE each pilot got four total flights (two on Ontario. Canada M5M 1W3 Albuquerque. NM 87111 Friday and two on Saturday), of which the best three would count for final MODEL ENGINES paris castings, props AVIATION MAGAZINES Back issues Air placement. Friday was the hottest yet at accessories slick and tissue gas/rubber kits Trails. MAN. Flying Models List $100. List 25C T Crouss. 100 Smyrna West sample print. Jerry Derushie 932 King St 90° plus, with slightly higher winds Springfield MA 01089 East. #6. Hamilton Canada L8M 1B8 which made the heat more bearable and the pilots work harder. The largest

DECEMBER 1979 115 FULL SIZE PLANS SERVICE No. 1079-S5 H A N K ER C H IEF $2.00 No. 5791 DFH - 20 $7.50 Hull lines drawing for 50/800 R/C sailing Including reprint of construction article Latest FA I pattern ship by top Swedish yacht. Uses Bingo sail rig. By John Hanks. flier. Has built-in pipe. Bengt Lundström. (if any) No. 9791 SYN CH RO G YRO $5.00 No. 12791 A5A V IG ILA N T E $5.00 Twin-rotor autogyro for 2-ch. radio, .35 STICK 'EM PATTERNS R/C Sport Scale modern-day jet fighter engine. Easy to build and fly. G. Chaulet Complete sets of pressure sensitive patterns for .40 size pusher engine. Pavel Bosak. provide "printed wood". . . on your stock . . No. 9792 C R IC K E T $3.00 for selected M ODEL BU ILD EFt plans. Press No. 12792 E X C A LIB E R II $5.00 Balsa profile fuse, Ace foam wing 1 /2A all patterns for ribs, bulkheads, tips, etc., on R/C tunnel-hull outboard constructed of quickie for 1 or 2-ch. radio. J. Headley. proper thickness sheet balsa or plywood, plywood, for K&B .21. By Jerry Dunlap. and cut 'em out! No tracing, no transferring, No. 979 O .T. LANZO '37 STIC K $8.50 no plans tearing, no inaccuracies. Just like First R/C Nats winner, 4th in Famous making up your own kit with printed wood. No. 12793 STARDUSTER TOO $2.50 R/C series. Spans 9 ft. By Chet Lanzo. Free flight rubber scale model of popular "Stick 'em Pattern" numbers correspond to homebuilt bipe, 18" span. Steve Gardner. plan numbers Order with plans and they'll No. 8791 S N E A K Y P ETE $6.50 be mailed together . . 3rd Class. Add 65tf Contemporary 61 pattern ship. Howard No. 1279-O.T. MISS T IN Y $3.00 per set to mail patterns 1st Class. Pete lines, fixed dual gear. Dick Hanson. Well known and sharp little 1938 gassie for .19-.23 ignition. 46". Barney Snyder. CALIFORNIA RESIDENTS ADD 6% TAX. No. 879 O.T. 1 CURTISS F-11C-4 $4.00 Reprint of Miniature Aircraft Corp. plans No. 11731SP BIG JOHN the F IR S T $5.95 plus ribs and bulkheads from printwood. No. 574-O.T.SP T-D COUPE $2.95 11791 PO CKET SO A RER $3.00 No. 674-O.T.SP RED ZEPHYR $3.95 All sheet-balsa T-tail one or two-channel No. 879 O .T. 2 C H A LLEN G ER $3.50 No. 6741SP TRIXTER BEAM $2.95 50" span glider, for .020. B. Lundström. Easily-built Class B gassie with 50" span No. 774-O.T.SP OUT Ό SIGHT $2.45 from May '41 Air Trails. H A Thomas. No. 7741SP C U R TISS A/12 S H R IK E $3.95 11792 CURTISS 18 T-1 $3.00 No. 874-O.T.SP POW ERHOUSE $3.95 Rare tri-winged military seaplane in 3/4" No. 7791 TU R N ER SP EC IA L $9.00 No. 91074-O.T.SP BUHL PUP $4.95 rubber scale, spans 24". By Bill Noonan. Roscoe's famed Thompson Trophy racer No. 1174-O.T. SP LANZO S TIC K $1.95 in 2" = 1' R/C scale. Col. Bob Thacker. No. 11743 SP "C -Q U ELL" $3.95 1179-O.T. MISSPHILADELPHIA $7.50 No. 575-O.T. SP M ER C U R Y $3.95 Maxwell Bassett's famed 8-ft. parasol gas No. 7792 P ER C Y $4.00 No. 775-0.T. SP BOMBSHE LL $3.25 model, kitted by Scientific. By M8 staff. Pulse-rudder slope glider uses panty-hose No. 277-O.T. SP BERLINER JOYCE $5.25 egg/pod fuselage, 68" span. Jack Headley. No. 4771 SP "MISS ARPIEM" $3.25 No. 10791 TH E BIG S T IK $10.00 No. 577-O.T. SP GLADIATOR $4.75 World's most popular R/C design in a new No. 6791 CAP 20L-200 $10.00 size (8VS'). For 2" engines. Don Anderson. Fully aerobatic large-scale low winger for Price includes 3rd Class postage and reprint 2 cu. in. or red.-drive engines. Jeff Tracy. of building instructions (if any). Add 65tf No. 1079-0.T. PAN TH ER $3.50 PER PLAN for 1st Class postage. Add $1.00 Classic low-wing kitted by Peerless, for No. 6792 LO N GSTER $3.00 PER PLAN for overseas orders (except APO .19 .23 ign eng. 46" span. Walt Schultz. F/F or R/C 1-inch scale (30" span) cutey and FPO). Complete plans list 35i. for CO2. .010, or rubber power. Le Gray. CALIFORNIA RESIDENTS ADD 6X TAX. No. 10792 FIR S T NIGHT $2.00 Novice sport rubber ship, 24" span, OK No. 679-O.T. VALKYRIE .020 $3.00 MODEL BUILDER PLANS SERVICE for P-30 event. By Godden & Moseley. Build this .020 Replica of Carl Goldberg's 621 WEST NINETEENTH ST. famous soaring gas model. Rudy Calvo. COSTA MESA. CALIFORNIA 92627 is not a great way to land! Dave coaxed swing, as very many were in evidence in battle and the flying was very good. In and coaxed and had it nearly down all classes, with many more people fact, the major problems I saw were when BLIP up went the wing for a knife- asking about them. Tony Bonetti chose centering of maneuvers and drifting in edge again, so we went straight up the snaps in opposite directions for one the Figure M ’s and Square Horizontal (thank you, engine) and tried again. of his finals maneuvers. Tony does it very Eights. As you can see from the results, Finally we did get it down in rather a well, slows nearly to a stop before Dave won his third straight Nats, but by hard nose-first arrival, but it was in one beginning. It is a crowd pleaser and the narrowest of margins (four points). I piece. Actually it wasn’t hurt much . . . different! think that is called close!! One point scraped paint, bent landing gear, Saturday came, the last day of finals, from one judge anywhere along the way crimped steering cable, etc. The prob­ and so came the winds; 20-25 mph could have made the difference. I am lem? A broken wire on the aileron servo shifting from nearly straight down the very proud of Team Brown but equally motor. O h well, we livened up the day runway (right to left) to from over our proud of Dean Kogerand hiswife/caller, for everyone. right shoulder. It gave the pilots an Barbara. Can’t wait for South Africa with What with fewer people (40 as com­ added problem and made playing catch­ a team like that! They WILL know we pared to 140) it was easier to watch up awful hard for us (remember, we were there. everyone fly in the finals. Very impres­ have a built-in throw away!). It also The trophy presentation was held at sive was Dean Koger’s EU-1. That sure is made the outer zero line hard to miss, the field directly after the flying was over a nice airplane. I think the thing I like especially on the rectangular approach and tabulation finished. Bill Seidler gave best is its nearly constant speed ... it in the lower classes. Tony Bonetti, Dean out the A M A trophies and Jim Vander- goes up, down, and sideways at the same Koger, and Dave Brown had a heck of a beck gave special NSRCA trophies to the speed, giving the flight a very organized, stable impression. This year Joe Gross UNITED STATES had a new plane he designed, called the Thunderbird. It is a take-off on Dean's PATTERN JUDGES EU-1, as it uses a very similar wing and j o fa USPJA ASSOCIATION tail surfaces, but has a much smaller and different shaped fuselage. The strange NAME part is that it flies very similar to Dean’s and looks much like his in the air. Again, ADDRESS a very stable, solid airplane. It must φ · work, as Joe was flying the best I’ve ever CITY STATE ZIP seen him. Betty Stream, Sec/Treas., 3723 Snowden Ave., Long Beach, Calif. 90808 The Curare/Tiporare craze is going full

116 R/C MODEL BUILDER highest placing NSRCA member in each class (the winner of the class in each EM S SR-1 case). Betty and Suzi Stream were both awarded plaques from the NSRCA for S E R V O their time and effort spent in the past REVERSER three Nats and as editors for the K-Fac- tor. And yours truly received a beautiful Price - $10.95 plaque for my secretary-treasurer duties Plugs into your system between the Receiver and other faithful service. and Servo and reverses the direction of that The Nats was over for us Pattern types. servo with relation to the Transmitter Stick Oh. there was still plenty of action in the motion. Available for all popular positive or Scale areas, and on Saturday evening negative pulse systems with connectors in­ A M A held its workers party in honor of stalled. An extremely handy device when all the people who did the thankless installing your system in a new airplane. ME AND MY RC jobs, from cleaning up garbage to Master Charge and VISA 4 COLOR (EXCLUSIVE RIGHTS judging, timing, water carrying, etc. Dealer Inquiries invited Betty Stream was honored here again for FROM ROYAL CROWN COLA) £ her many contributions to model avia­ ELECTRONIC MODEL SYSTEMS Your choice p l a n e tion by being awarded A M A 's Distin­ P.O. Box 1242, Placentia, CA 92670 BOAT CAR on poly FLI CAP guished Service award. ester/ cotton T-shirt With Also honored at this get-together MASTERS AMA WINGS AMA Wings were members of the Sky Knights club, 1) Dave Brown who was the host club for this Nats. They 4 COLOR 2) Dean Koger (PERMISSION FROM AMA) were the most active host club we’ve 3) Tony Bonetti $6.50 had in ages. Dozens of members could 4) Don Weitz Size S, M, L, XL + 50« Postage be seen every day, doing everything 5) Joe Bridi from clean-up work to helping run an 6) Joe Gross We do custom work for clubs, event. Wherever they were needed, 7) Bill Thomas special events, businesses they were there. They were also highly 8) Chuck Shade Information sent on request. visible, as they all had brightly em­ 9) Marty Wittenberg broidered shirts proclaiming who they 10) Robert Redmon were. Thanks, Sky Knights. There was still the airshow on Sunday, • fU

DECEMBER 1979 117 Quick-Build Exact Scale

Precision 4" Complete Byro driven pulley -Drive, w/prop · ensures vibra­ spinner, only 2 \ tion-free service Less than one year ago, Byron Originals introduced its lbs. Pitts Special with optional Byro-Drive reduction unit. We Unique engine made some pretty strong product claims and were more mount offers than ready to back them up. We have since learned, from wide range of positions for actual applications by customers both in this country and locating engine overseas, that the Pitts and drive unit have far exceeded end exhaust equipment ben- our own ratings. Whether it be packaging, overall parts fit, oath cow l ease of assembly, fidelity to scale, flight performance, 2 0 X 8 maple materials quality, overall appeal or completeness, these tig h te n e r prop end 3V»“ affers easy spinner included with Byro Drive. firsts from Byron Originals have firmly established a new decision pulleys adjustment for standard of excellence for the entire modeling industry. designed and optimum per matched for peak formance and Tensiometer ind performance extended belt icotos exact No one will agree more than the proud and satisified recommended Pitts and Byro-Drive owner. He'll be the first to recom­ belt tension for peek perform mend a Byron Originals kit for your next project. And you ance and belt can count on him giving you a long list of reasons why. longevity. Poly Flex’ V- We suggest you take his advice and look to Byron belts-proven a! Originals for the newest and most intriguing concepts in ter years of tool shop applications recent modeling history. You'll agree it's like a breath of requiring up to fresh air. 20,000 rpms. The Proven GP/tf Order Byro-Drive model number for matching engine. Model No. for Engine MFR-10 .60 & .65 OS. Max. frt. & r. valve FIR-11- .61 & .65 Rossi, rear valve RF-12- .61 & .65 Rossi, front valve WFR-14 .61 speed Webra. frt. & r. valve TFR-13- X.60 Supertigre, frt. valve. r. exhaust KF 15 .61 Kraft HPFR 16 Silver Star or Gold Cup. frt. & r. valve OPSR 17 OPS .60 Speed, rear valve $212.95

Weight: ready-to-fly, t^fefuel, ★ Under 15 lbs. wimiconokote finish. ★ Under 17 lbs. with Epoxy/Fiberglass (Prices subject to change without notice) finish. Send to: Byron Originals, P.O. Box 279, Ida Grove, Iowa 51445. Ph. 712-364-3165 Includes ALL ITEMS to Kits... complete models as shown! Engine, radio, and final paint not included BYRON ORIGINALS I m L U t ii’ t,, m, g.„. i... smi *_J

Wing Span - 5 7 " MiG-15 Length - 55" Ready-to-fly wt. -8 Vi lbs. Wing area - 600 sq. inches For .6 0 size engines and 4 channel radio The First Practical Approach to Realistic Jet Performance That: * Is designed for the average R/C i thusiasts. * Allows short grass strip take-offs * Offers fast and easy starting having to remove and assemble hatches. * Eliminates complicated belt- procedures * Readily accepts most standard .60 si; engines * Does not require high nitro fuel for satisfactory performance * Arrives factory installed (standard With factory installed equipment) and ready for engine. * Produces up to 8Ά lbs. of static thrust with Schnuerle .6 0 and low nitro fuel. * Quick Assembly Scale Accuracy Easy Access to Radio and Engine

Unlike other quick-build kits that often sacrifice authentic detail for fast assembly, Byron Originals has kept both authenticity and simplicity high on the priority list. All die-cut The ducted fan with exclusive wood parts and 11 foam components needed for completion are designed with quick assembly, scale accuracy and quick-start capabilities. minimized weight in mind. All foam modules consist of light­ weight yet impact resistant injection molded polystyrene. Fuselage consists of hand-layed fiberglass and arrives with fan unit, thrust tube, radio compartment and push rods already installed. All decals and color scheme templates also included. All control surfaces utilize center point hinging requiring standard servos. Every last item, except radio, engine and final paint are included in kit. No shaping or carving required. No extension provided w ith kit. guesswork involved. Only quick, accurate and enjoyable Add $8.00 for building. shipping to any Optional epoxy/fiberglass kit for glassing wings and tail sur­ U.S. address. Items $168.00 faces available for $22.50. shipped by United Parcel Service. Factory Direct Price IN THE BEST CIRCLES, IT’S fiber skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

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

See your dealer, or order direct. Dealer inquiries are invited. All direct orders sent postpaid in U.S. MODEL BUILDUPJER PRODUCTS California residents add 6% sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 " \ OS 50 FSR WORLD ENGINES We are pleased to share with OS the an­ nouncement of the new 50 FSR. This middle size Schnuerle will take its place beside the OS 40 and the OS 45 FSR's. The 50 has a WORLD ENGINES slightly larger frame than the 40 and the 45 but it is substantially smaller than the 60. If you are using a 40 or 45 size Kaos, for instance, this might be just what you are WORLD ENGINES looking for to put some more excitement in your life. This engine is also going to be offered as a U/Controf engine. The wire size for the 50 is the same as the 45, whereas if you go to a 60, it is substantially heavier WORLD BIGINES and you have to have longer lines. Having another engine in this size range will be excellent for World E ngines as the demand for the 40's and the 45's has exceeded the supply. WORL0 1»GINES OS 50 FSR R/C ...... $109.00 U/Control V e rsion ...... $95.00 8960 Rossash Ave., Cincinnati, Ohio 45236 Telephone (513)793-5900 Telex 214557 ______/ M RC-Webra's Awesome Threesome... and internat championships to it's credit State Of The Art Carb... Each of these You're looking at three of the most power­ It's ready now for another decade of titles, engines has in common the new MRC- ful engines MRC-Webra has ever made. with increased RPM's, improved timing Webra Dynamix Slide Valve Carburetor An awesome array of brute force and con­ and advanced porting. featuring with these trolled performance. Each has been care­ extraordinary advan­ fully honed for the 80’s ... and each comes tages: State of the with our new slide valve Dynamix car­ buretor ... the most advanced and efficient Speed .61 carb ever designed... proven in competi­ Side Exhaust tion by the world's national and inter­ (1024 R/C) design national champions. increases RPM’s Advanced fuel metering system controls flow Adjustable lever for precise matching of carb to servo throw Elimination of sag at mid-range an end Speed 61 to hesitation. Rear Exhaust (1030R/C) See these three, hot Schneurle ported screamers at your hobby dealer... and get ready for the 80's and beyond.

Ready too for Speed .91 tomorrow is the Side Exhaust .91 R/C (1037R/C), the brute (1037 R/C) that took the 78 Tournament cf Champions single handed with 18 of 28 entrants using The (1030R/C) Schneurle .61 with rear it to harness pattern power. . exhaust is new with a beefy 17mm crank­ including the winner It too shaft, a hefty crankcase and jumbo ball now has the Dynamix carb bearings. It can handle top end heat in and it too is bursting with stride, easily reaching 1 85hp at 16,000 raw force for the big payloads RPM. It's the ultimate pattern engine. and Va scale craft of the 80's

And there's no secret about the proud past of these other two screamers. The big MODEL RECTIFIER CORP. (1024R/C) Speed .61 with a slew of nat 2500WOODBRIDGE AVE.. EDISON. NJ 08817