NOVEMBER 1986

U.S.A. $2.50 Canada $3.00

ICO 80545

volume 16, number 178

WORLD'S MOST COMPLETE MODEL PUBLICATION

FEATURES

ONSTRUCTION

Bboard THE SR SERIES: TRAINER SYSTEM: MORE, FOR LESS Airtronics radios offer you the The SR Series has a built-in appearance, features, and feel of R/C Trainer System compatible high-priced R/C transmitters. The with Airtronics XL and Cham­ flight-proven SR4R and SR6DR pionship radios. radios provide reliable R/C opera­ This feature allows two tion for beginner and expert alike. transmitters, coupled by cable, The fully compatible SR Series to control a single aircraft, features plug-in RF modules, a enabling the ------Trainer system, and precision instructor to gimbals for the feel and control take over con­ of our more expensive R/C trol during systems. flight training. VALUE: FEATURES: I______Airtronics’ economical SR • Servo reversing for easier Series radios offer modelers installation the best features, appearance, and • Plug-in RF module allows for reliability for your radio dollar. rapid frequency changes The same state of the art • High Quality Rechargeable circuitry, modem construction Nicad batteries techniques, and advanced ergo­ • Adjustable length and tension nomic design used in our more sticks sophisticated, higher-priced sys­ • Dual Rates (SR6DR Only) on tems, is incorporated into the elevator and aileron SR design. • Fully compatible Trainer FLEXIBILITY: System SR4R and SR6DR systems can • Electronic Trims (SR6DR only) be expanded, as eliminate neutral shift your flying expe­ • Balanced Mixer — AM or FM rience increases. Receiver for superior noise and Interchangeable image rejection plug-in RF The Airtronics SR Series— modules allow when it comes to quality, features, modelers to and affordability, no one is quickly and easily change frequency remotely close. bands, and switch from AM to FM operation. Airtronics’ complete new prod­ uct catalog is available for $4.00. COMPATIBILITY: Please send check or money order The SR4R and SR6DR utilize to the address below: thoroughly tested and flight-proven transmitter electronics and the same quality receiver found on our more expensive systems. ^AIRTRONICS SR Series component technology ^ 11 Autry, Irvine, CA 92718 is fully compatible with all of (714) 830-8769 Airtronics’ quality radio systems, A t Airtronics. we want to be known servos, and accessories. as the best, not just the best known. New! The Leisure Lanzo Bomber electric R/C kit. Easy to build, light weight motor glider for ’’old timer” competition or,pen flying.

Leisure introduces lunch hour

Scaled from one q f the most popular old timers o f all, the classic Playboy Senior, the R/C flying. Leisure Playboy is a stable, easy to fly design Just right for electric flight.

Want to try an electric R/C When you own a Leisure elec­ airplane with quickie clean up after each flight. Turn on the 500 performance? radio, flick the airplane motor switch on tric flight system, your R/C flying The Leisure Wasp can give you exciting and you’re flying. isn’t limited to weekend trips to a aerobatic flights o f remote flying site. Leisure has made 8-10 minutes that quiet, clean and economic electric you will never forget. flight a practical reality. Now any Because these R/C airplanes are park, field or vacant lot becomes electrically powered, if your flying site your flying site, anytime, any­ neighbors don’t see you they will never where, even lunch hour in the city! know you’re there. When we’re talking electric power, we’re talking quiet! To power the Leisure Playboy, Lanzo Bomber, Wasp and the many other electric R/C kits now appearing Leisure offers a complete line o f fine accessories includ­ ing chargers, battery packs, switches and connectors. on the market, Leisure offers its’ 500 Leisure’s total system approach to R /C electric makes it and 600 series 05 electric motors. Com­ easy to get into. I f you haven’t tried R /C electric flight pact and powerful, these economically you're missing out on a lot qffun! Leisure Electronics is the natural The Leisure 500 series 05 stock motors are choice for all your R/C electric require­ low priced but powerful. Available in direct drive and geared versions these motors are an inexpensive ments. Sixteen years ago we pioneered introduction to electric R/C. the use of electric power in R/C cars and The Leisure Playboy and the new airplanes and we have been constantly Lanzo Bomber are excellent R/C elec­ introducing new products to make your tric airplane kits for the beginner and electric R/C hobby more convenient more accomplished flyer alike. and exciting. See your R/C hobby Originally designed for free-flight, these dealer or send a stamped, self-addressed The Leisure 600 series 05 motors are ball bearing, business size envelope to us for our stable airplanes combine powerful take­ all metal motors. Also available in direct drive and eared versions, these motors deliver maximum power for latest catalog and technical bulletins. off and climb capabilities coupled with f>nger flights. minimum sink rates to give long, enjoy­ able flights and slow landings. For the priced motors are manufactured to pre­ more advanced flyer the Leisure Wasp cise tolerances and material standards to can accomplish aerobatic maneuvers insure maximum reliability and long life. Leisure within a small airspace - just the thing Think of it, no more hard starting, 22971 "B" Triton Way, Laguna Hills. CA 92653. for limited flying sites. troublesome engines and no oily mess to MODEL 0 NOVEMBER 1986

BUILDER volume 16, number 178 898 West Sixteenth St., Newport Beach, California 92663 Phone (714) 645-8830

CONTENTS STAFF EDITOR/PUBLISHER FEATURES Wm. C. N orthrop, Jr. GENERAL MANAGER W O R K B E N C H , Bill Northrop...... 6 Anita Northrop D E A R J A K E ...... 7 ASSISTANT GENERAL MANAGER Dawn Johnson O V E R T H E C O U N T E R ...... 8 ASSOCIATE EDITOR B IG B IR D S , Al A lm a n...... 10 Richard Dowdy PRODUCTION ARTIST C H O P P E R C H A T T E R , Dick Grossman...... 12 Kimber Jett-Baird S IM P L Y S C A L E , Cliff Tacie ...... 14 DRAWINGS BY Al Novotnik E LE C T R IC P O W E R , Mitch P oling...... 16 ACCOUNTING MANAGER E L E C T R O N IC S C O R N E R , Eloy M a re z ...... 18 Robert Ruiz A T T H E N ATS, George P. Burdell...... 2 2 OFFICE STAFF A. Valcarsel R A M B L IN ' W IT H R IC H M O N D , stu R ich m o n d ...... 2 6 Mike Glenn

B Y R O N FAN-FLY, Mark Frankel...... 2 8 CONTRIBUTING EDITORS Al Alman Fred Lehmberg IN S ID E E N G IN E S , Mike B illin to n ...... 3 2 Mike Billinton Eloy Marez ENGINES OF THE WORLD, Stu Richm ond...... 3 6 Jake Doe Walt Mooney Jerry Dunlap Mitch Poling P L U G SPARKS, John Pond...... 3 7 Bill Forrey John Pond Dick Grossman Fernando Ramos R /C S O A R IN G , Bill Forrey ...... 4 2 Bill Hannan Stu Richmond E U R O P E A N S C E N E , Cees Kaijim ...... 5 0 Dick Hanson Ray Roberts Mike Hazel Dan Rutherford C 0 2 POWER, PART TWO, Bill Hannan...... 51 Cees Kaijim Bob Stalick Joe Klausc C liff Tacie H A N N A N 'S H A N G A R , Bill H a nn an...... 5 6 ADVERTISING REPRESENTATIVES FREE F L IG H T , Bob Stalick...... 5 8 Bill Northrop FREE F L IG H T S C A L E , Fernando Ramos...... 6 2 Home Office, Costa Mesa Al Novotnik FOR TEACHERS ONLY, Ray Roberts...... 6 3 4 Beverly PL, Norwalk, CT 06850 C O N T R O L L IN E , Mike H a ze l...... 6 4 Bus. Phone (203) 847-7478 Al Tuttle PLANES A N ' FACTS A N ' CHICKUM TRACKS, Fred Lehmberg...... 6 6 417 Ehilani St., Pukalani, Maui, HI 96788 THREE-VIEW Ph. (808) 572-0563 MODEL BUILDER (ISSN 0194 7079) is pub­ MITCHELL W IN G B-10, Modelar Magazine...... 3 5 lished monthly by RCMB INC., 898 West 16th St., Newport Beach, California 92663. Phone (714) 645-8830. CONSTRUCTION Subscriptions: $25.00 per year, $47.00 for two years. Single copies $2.50. Subscriptions out­ side the US (except APO & FPO) $32.00 for F O O T R O T FLIER , John R e id ...... 19 one year only. All payments must be in US funds, drawn on a US bank. BEBE CONTEST SPECIAL O.T., Alan Onhof...... 41 Copyright 1986 by RCMB INC. A ll rights DUNLAP 11cc TUNNEL BOAT, Jerry Dunlap...... 4 6 reserved. Reproduction without permission prohibited. R A C E K R -7 , Lubomir K o u tn y ...... 5 3 Change of address notices must be received six weeks before date of issue that new address takes COVER: "Day's End," by Bob Benjamin, depicts a scene in early 1940, high above Ihe Pacific, as two Grum­ effect. Send old address with n e w .. old label man F3F-2's of the U.S.S. Enterprise's VF-6 return to the fleet after a test of navigation skill over the top of a lay­ preferred. Duplicate issues cannot be sent. Post­ er of thick cumulus clouds. Exuberant at having located their carrier precisely, the two young naval aviators, master send address changes to Model Builder, one of whom is the squadron leader, chase each other in mock combat down through the large breaks in the clouds. It is "Day's End" for more than just their exercise, as within the next year the day of the Navy's biplane 898 W. 16th St., Newport Beach, California fighter will end as well. The original of this 20”x40" painting is available for purchase through Ray Hudson 92663. Associates Inc., 106 Central Way, Kirkland, Washington 98033. (206) 822-1263. Second class postage paid at Newport Beach, California, and additional offices.

2 MODEL BUILDER — Sonny Myers Says: ------I’m RIDING IN IT··· I Want The STRONGEST Glue! Satellite City's "HOT STUFF”

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L Industrial Strength INSTANT ADHESIVES Satellite City P.O. BOX 836, SIMI, CA. 93065 (805) 522-0062 KDUBHR M A R K II TEACHES THE NOVICE TO FLY LIKE AN EXPERT

Designed by CLAUDE McCULLOUGH

u s. air force ENGINES: .40 to .50 WINGSPAN: 50" WING AREA: 540 Sq. In. WEIGHT: 5-1/2 - 6 Lbs. LENGTH: 45-1/2"

ABS PLASTIC PARTS - EASY TO GLUE AND PAINT KIT FEATURES: Pre-Cut Foam Wing 36 Page Photo-Instruction Book with SMOOTH CONTROL RESPONSE Handy Printed Fuselage Sides - Build Step-By-Step Instructions FULLY AEROBATIC Directly on the Wood Hardware Package Includes: Formed Plastic Fuselage Top Molded Control Hinges SYMMETRICAL WING SECTION Jet Style Canopy with Molded Framing Nylon Control Horns Molded Plastic Cowling Nylon Nose Gear Bearing BUILDS FAST Sheet Balsa Wing Covering Nylon Nose Gear Steering Arm BUILT-IN ANTI-STALL STABILITY Sheet Balsa Tail Surfaces RC Links Rugged, Ready-Bent Landing Gear Aluminum Motor Mounts COMPACT SIZE Die-Cut Plywood Parts Wire Aileron Horns Fiberglass Wing Tape Nylon Screws for Bolt-On Wing Attachment FOR 4-CHANNEL RADIO EQUIPMENT

A carefully tailored design that will do every stunt in the book - even the lomcevak - and yet is not difficult for low time pilots to handle. The wash-out incorporated into the foam wing allows the model to be slowed down to a walk for the landing approach and flared onto the runway in a main-gear-first touchdown without undue stalling or snap-rolling tendencies. The Kougar is highly recommended as an introduction to low- wing flying and for AMA pattern competition...... ° ° κ κ · All prices subiect to change without notice.

If You Bought Colored Fuel L in e ...... YOU DEFINITELY PAID TOO MUCH! oniS n'SSL s ...... w hr Pay More For Fancy Colors? required tubing diameter Sig was the first to introduce silicone fuel line tubing to the model aviation market way Ιϋ ΐΛ 1 0 250« backin 1964, and our premium tubing still comes in its original natural white color. Some sh-661 25 ft. roll $13.25 0< our competitors would have you believe that adding blue, red, or yellow dye to their - RGE1092 D 187 o d tubing and charging you a higher price makes their product better. But don’t you believe ^ [ _____ SH-290 if t . pkg...... s .85 Sig’s ori§inal silicone fuel tubing has all the important characteristics you need in a sh-646 2 ft. pkg...... !....!!. *1.15 quality fuel line. not for gasoline SH-291 25 FT. ROLL...... J12.95 ...... Heat-Proof - will not melt even if resting directly on the hottest part of a running model engine. SH- ^ 011 ft^ kg.0 ...156α°$)Λ0 * Won’t Harden In Fuel ♦ Resistant To Cuts And Tears shTn 251 tproLl...... ml9° There Is None Better At Any Price (OR COLOR)! See your dealer first! If not available, call 800-247-5008 toll free for orders only. For mail orders under $15.00 add $2.50 postage. Over $15.00 ppd. Catalog 48 - $3.00 SIG MANUFACTURING CO.. INC...... Montezuma. IA 50171 h o w y o u Can Build Better Cars and Choppers FLYING MODEL HELICOPTERS: FROM BASICS TO COMPETITION Diy Ettonhai to» any RC chopper pilot You «nil become a belle» jxlol wrth th e * detaJed mjtruction* covering naming advanced firing aerobatics and

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American Express Diners ■ FLYINC Hit COWTROL MODELS _ _ learn how to takeott and land Smooth* perform tncjY Club. A Carle Blanche. SHIPPING & HANDLING lor orders to 129.99 are 12.95, orders 130.00 or more 13.95. The lee charged covers cost ol shipping 4th class bookposl or UPS We will ship the best way NO CODs. Wl residents add 5 % sales lax. BETA N£W 109982D OUR PRICES A R E G U A RA N TEED 75 DAYS FROM THE COVER DATE OF THIS PUBLICATION who form the hard core of modeling, the ones who are truly concerned about the fu­ ture of modeling and AMA, but we also hope the message reaches others less in­ terested and brings them to the realization that with very little effort on their part, they can contribute to the well being of the great hobby. It was brought to our attention, prior to the Nationals, and prior to the meeting of the nominating committee, that John Worth's name had been put up for the posi­ tion of president. The first reaction to that was, "Wow, we gonna have us a dictator!" However, rational thinking shows it to be a move toward smoother and more efficient operation of the organization. Here is John's own statement in this regard. "If you think it would be 'improper' for AMA'S JOHN WORTH the Executive Director to be on the ballot, bership decide." ■ f r o m consider the following: Unfortunately, the Nominating Commit­ “This is not a power play on my tee did not choose to see the value of this part. . . quite the opposite. I think the AMA offer, and John's name does not appear on Bill President's position should be subordinate the ballot which you will be receiving to the Executive Council. If elected, that's soon. Northrop'* how I would conduct the office. That posi­ However. . HOWEVER . .this does not tion is consistent for me... it has been the mean that John Worth cannot be elected w o r k b e n c h basis of my 22 years serving the Council. AMA President starting in 1987. You can still "No conflict of interest is involved, be­ make him President, by simply printing cause the positions o f President and Execu­ nine letters, "John Worth," in the space for a • One of the most important elections in tive Director would be compatible and write-in vote. An all-out effort by Model AMA history is about to take place. Ballots complementary, rather than adversarial. Builder readers w ill do the job. for electing the President, in addition to Combining the positions w ould assure RCMB Inc. is strongly in favor of John Vice President of Districts 1, 5, and 9, are oneness of interest and direction. Three Worth's election to the AM A presidency. due to be mailed out shortly, and if every­ very well known aviation organizations This w riter has known John since first meet­ thing runs according to average, about have combined the positions of President ing him at an R/C flying get-together in 20,000 votes, or only 20 percent of AMA's and Executive Director: the National Aer­ Hampton, Virginia at the NACA (now total membership of 100,000, w ill officially onautic Association (NAA), of which AMA NASA) facility, Langley Field, back in 1957- register their preference for, and determine is an independent division; the Aircraft 58, where he was employed as an aeronau­ the office of AMA president. Owners and Pilots Association (AOPA), a tical research technician. In 1963, he was It's obvious that those who vote have much larger organization than AMA; the elected President of AMA, an organization more interest in AMA than the majority of Experimental Aircraft Association (EAA), with a 1962 deficit of $9,000 and fighting members who join primarily for the insur­ another division of NAA. Also, the Ameri­ for its very existence! Working in effect as ance coverage. It's also quite clear to this can Society of Association Executives, the both President and as Executive Director editor that the AMA voters represent a high national organization for all associations, (on an unpaid basis) with the retirements of percentage of the hard core, continuously has this arrangement and recommends it Russ Nichols, John managed to get AMA on active modelers, and that many of these are for other organizations. a break-even basis by the end of 1963. In Model Builder readers. Therefore, it is felt "I believe this concept should be offered 1964, he relinquished his presidency to that we are talking to a majority of the active to the membership for choice. The best way take over the full task of Executive Director modelers and those who are interested in to assure that would be to have the current and 21 years later, by the end of 1985, the the future of modeling and its national or­ President, myself, and anyone else on the AMA had over 110,000 members, a building ganization, the Academy of Model Aero­ ballot. Such a ballot would avoid accusa­ and museum of its own, and an operating nautics. tions that the Nominating Committee budget of over 3.5 m illion d o lla rs .. .much Many of our regular readers may be won­ would not allow the membership to decide of which was largely attributed to John dering why we are taking any interest in this what kind of presidency they might prefer. Worth's efforts. matter at all, as it's pretty well known that "There should be no doubt that I am fully Here is some more background on John we, as well as other private enterprise qualified for the job, based on past and cur­ Worth that many newer AMA members and model publications, strongly object to the rent experience. It should be noted, too, modelers may not be aware of. way in which AMA has gone into direct that a significant savings in annual officer John Worth is a member of AMA's Hall of competition with us by expanding the AMA expenses should be realized from combin­ Fame, is an AMA fellow, has received the membership newsletter to the status of an ing the positions; at least $ 15,000 over three Federation Aeronautique (FAI) prestigious all-out slick magazine, which effectively years. Tissandier Diplome (for leadership in inter­ reduces our operating revenue by cutting "I believe in letting the AMA system national aviation activities), has been secre­ into our primary source of income, the sale work, through elected and appointed tary of the FAI's committee for International of advertising space. officerships and committees. With an or­ Aeromodeling (CIAM) for many years, has However, our main concern is the future ganization so dependent upon so many been named this year by the NAA as one of of modeling and the effectiveness of AMA. volunteer positions, I think it is vital for the only four elder statesmen of aviation (the Model Builder's donation to the new head­ democratic processes to work without in­ only part of this recognition he objects to is quarters building in Reston, Virginia is evi­ terference or pressure from the presidency. the word "Elder!"). He was formerly a mem­ denced by the plaque on the railing as you My goal would be to m inim ize controversy ber of AMA's Free Flight Contest Board, was enter the building, overlooking the model involving the president and any decisions Chairman of AMA's Radio Control Contest museum area. Our continued friendship or actions would be in accordance with Board, is an AMA Contest Director, and was with key members of the organization rises council consensus. formerly an officer in AMA's FAI team selec­ above the controversy over more material "This concept deserves an opportunity tion programs. He was also an active mem­ things. It is for these reasons that we address for presentation to the membership. You ber of AMA's Frequency Committee for the following, particularly to those of you can make that possible if you let the mem- many years.

6 MODEL BUILDER How You Can Build Better Boats, Planes, Cars and Choppers MANUAL OF ELECTRIC RADIO FLYING MODEL HELICOPTERS: FROM CONTROL CARS BASICS TO COMPETITION Burkmshaw loaded wrth information on choosing a Day Essential lor any R/C chopper pdot You m l eat and R/C equipment batter*» pamhng gearing become a better plot with these detailed instructions THE BUGGY BOOK suspension wiling up I» a race toe pirp and much covering banting advanced ttyrfig aerobatics and Burtatha* The most complete more Handy tips shorn you now to In common competition flying«and a r' more------—* You ------m i be dome loops book available on run rune R£ obtems and ho* to get the most from your hobby mnobme* 19? pap butties Great mlormabon from Ecommended tor all teveh ol eipertne 95 pgs 110761 A E ...... $15.95 the editor of Rsdio Control 123 « Λ * Uodeisl Uodet Cars Ms you m 110681A E ...... S 10.95 on everythmg you oeed to know about the noting «odd ot ofl RADIO CONTROL IN MODEL BOATS road R/C Complete coverage ot Cundefl learn the bes1 methods lor R£ boat opera construction operabon & more twn Detaded t« t and hundreds ol photos eipteui lor bcpm rrs $ experts 96 pgs ------*ftch equipment ts best mstafrbon choosing the S »/i|v,· did Bods Shipped proper boat Special equipment operation mamte 109611AE ...... $9.95 Oct 15 1986 nance «nd much more loaded wdh peat bps and tricks 160 pages sflbd 110760A E ...... $15.95 .$12.95 Helicopters JscfJikrhw heikopter SCHLUTER-S R/C HELICOPTER MANUAL Hand 10 Mmor chapter! * A 17 subtopcs Includes 8a v a ol Hehcopter lechnotogy Rotor Blades ( Thmr Dynarwcs Figtt Trammg. Performance Cakutabom Construcbon Techrugues dc 255 pgs hundreds oi photos $ detailed drawings 10 7492A E ...... $14.95

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Wl residents add 5% sales tar L BETA NEW 1099820 Visit our office & warebcxsse · ι 729 Prospect Ave Osceol» Wl OUR PRICES A R E G U A RA N TEED 75 DAYS FROM THE COVER DATE OF THIS PUBLICATION who form the hard core of modeling, the ones who are truly concerned about the fu­ ture of modeling and AMA, but we also hope the message reaches others less in­ terested and brings them to the realization that with very little effort on their part, they can contribute to the well being of the great hobby. It was brought to our attention, prior to the Nationals, and prior to the meeting of the nominating committee, that John Worth's name had been put up for the posi­ tion of president. The first reaction to that was, "Wow, we gonna have us a dictator!" However, rational thinking shows it to be a move toward smoother and more efficient operation of the organization. Here ip John's own statement in this regard. "If you think it would be 'improper' for AMA'S JOHN WORTH the Executive Director to be on the ballot, bership decide." f r o m consider the following: Unfortunately, the Nominating Commit­ "This is not a power play on my tee did not choose to see the value of this part. . . quite the opposite. I think the AMA offer, and John's name does not appear on Bill President's position should be subordinate the ballot which you will be receiving to the Executive Council. If elected, that$ soon. Northrop'* how I would conduct the office. That posi­ However. . HOWEVER. . .this does not tion is consistent for me. .. it has been the mean that John Worth cannot be elected w o r k b e n c h basis of my 22 years serving the Council. AM A President starting in 1987. You can still "No conflict of interest is involved, be­ make him President, by simply printing cause the positions o f President and Execu­ nine letters, "John Worth," in the space fora • One of the most important elections in tive Director would be compatible and write-in vote. An all-out effort by Model AMA history is about to take place. Ballots complementary, rather than adversarial. Builder readers w ill do the job. for electing the President, in addition to Combining the positions would assur& RCMB Inc. is strongly in favor of John Vice President of Districts 1, 5, and 9, are oneness of interest and direction. Three Worth's election to the AMA presidency. due to be mailed out shortly, and if every­ very well known aviation organizations This writer has known John since first meet­ thing runs according to average, about have combined the positions of President ing him at an R/C flying get-together in 20,000 votes, or only 20 percent of AMA’s and Executive Director: the National Aer­ Hampton, Virginia at the NACA (now total membership of 100,000, w ill officially onautic Association (NAA), of which AMA NASA) facility, Langley Field, back in 1957- register their preference for, and determine is an independent division; the Aircraft 58, where he was employed as an aeronau­ the office of AMA president. Owners and Pilots Association (AOPA), a tical research technician. In 1963, he was It's obvious that those who vote have much larger organization than AMA; the elected President of AMA, an organization more interest in AMA than the majority of Experimental Aircraft Association (EAA), with a 1962 deficit of $9,000 and fighting members who join primarily for the insur­ another division of NAA. Also, the Ameri­ for its very existence! Working in effect as ance coverage. It's also quite clear to this can Society of Association Executives, the both President and as Executive Director editor that the AMA voters represent a high national organization for all associations, (on an unpaid basis) with the retirements of percentage of the hard core, continuously has this arrangement and recommends it Russ Nichols, John managed to get AMA on active modelers, and that many of these are for other organizations. a break-even basis by the end of 1963. In Model Builder readers. Therefore, it is felt "I believe this concept should be offered 1964, he relinquished his presidency to that we are talki ng to a majority of the active to the membership for choice. The best way take over the full task of Executive Director modelers and those who are interested in to assure that would be to have the current and 21 years later, by the end of 1985, the the future of modeling and its national or­ President, myself, and anyone else on the AMA had over 110,000 members, a building ganization, the Academy of Model Aero­ ballot. Such a ballot would avoid accusa­ and museum of its own, and an operating nautics. tions that the Nominating Committee budget of over 3.5 million dollars. . .much Many of our regular readers may be won­ would not allow the membership to decide of which was largely attributed to John dering why we are taking any interest in this what kind of presidency they might prefer. Worth's efforts. matter at all, as it's pretty well known that "There should be no doubt that I am fully Here is some more background on John we, as well as other private enterprise qualified for the job, based on past and cur­ Worth that many newer AMA members and model publications, strongly object to the rent experience. It should be noted, too,' modelers may not be aware of. way in which AMA has gone into direct that a significant savings in annual officer John Worth is a member of AMA's Hall of competition with us by expanding the AMA expenses should be realized from combin­ Fame, is an AMA fellow, has received the membership newsletter to the status of an ing the positions; at least $15,000 over three Federation Aeronautique (FAI) prestigious all-out slick magazine, which effectively years. Tissandier Diplome (for leadership in inter­ reduces our operating revenue by cutting "I believe in letting the AMA system national aviation activities), has been secre­ into our primary source of income, the sale work, through elected and appointed tary of the FAI's committee for International of advertising space. officerships and committees. With an or­ Aeromodeling (CIAM) for many years, has However, our main concern is the future ganization so dependent upon so many\ been named this year by the NAA as one of of modeling and the effectiveness of AMA. volunteer positions, I think it is vital for the only four elder statesmen of aviation (the Model Builder's donation to the new head­ democratic processes to work without in­ only part of this recognition he objects to is quarters building in Reston, Virginia is evi­ terference or pressure from the presidency. the word "Elder!"). He was formerly a mem­ denced by the plaque on the railing as you My goal would be to minimize controversy ber of AMA's Free Flight Contest Board, was enter the building, overlooking the model involving the president and any decisions Chairman of AMA's Radio Control Contest museum area. Our continued friendship or actions would be in accordance with Board, is an AMA Contest Director, and was with key members of the organization rises council consensus. formerly an officer in AMA's FAI team selec­ above the controversy over more material "This concept deserves an opportunity tion programs. He was also an active mem­ things. It is for these reasons that we address for presentation to the membership. You ber of AMA's Frequency Committee for the following, particularly to those of you can make that possible if you let the mem- many years.

6 MODEL BUILDER Still an active model builder and flier, his and jobs to be done before retiring. We can not come to me and ask for support for this current interest is in electric power, with the help him by making it easier and more ef­ write-in effort. As mentioned before, I heard goal of advancing this activity as a solution fective for him to operate. He can do that about his nomination, and the fact that it to obtaining and keeping flying sites, so best by combining the Presidency and Ex­ was rejected, during our visit to the 50th that losses due to noise problems can be ecutive Directorship in a unified effort Anniversary celebration at the end of the reduced. aimed at increasing the AMA membership. Nats in the USA's own Sauna Bath, Lake Worth is also on a first name basis with His goals are: to provide more flying sites Charles, Louisiana. W ith his bid pretty well model industry and organization leaders all through more effective PR, to promote ignored by the Nominating Committee, he over the world. He has been married 36 more effective use of R/C frequencies, to ob­ had discontinued any further efforts toward years and has four grown children making it tain the most effective use of AMA's new attaining the goal. I brought up the write-in in the world on their own yet still part of a computerized capabilities, and to offer idea while John was changing his electric close-knit family. He is 62, in good health, more effective insurance programs. powered Le Crate during the Saturday flight and ready to give more good years to AMA. John Worth doesn't regard the presidency demonstrations, and later that day, when he Under his directorship AMA has grown as an ego trip. . . he has more honors than had had time to think it over, he informed from 20,000 members to over 100,000, with anyone else in AMA. To him the presidency me that he endorsed the idea and would a HQ staff that has grown from four em­ offers a more effective way, combined with supply the information needed to set up the ployees in 1963 to 45 now. The extremely the Executive Directorship, to do the big campaign. With the knowledge that he is successful second half of AMA's 50 year his­ jobs that still need to be done, to provide going ahead, many others have joined in tory is largely a measure of John Worth's ef­ modeling with greater prestige, stature and his support. We hope you w ill too. forts. But he is not yet ready to rest on his recognition. Write in "John Worth" for AMA Presi­ laurels.. . he has more mountains toclim b One final co m m e n t.. .John Worth did dent! ·

Dear lake: In the June 86 MB, in the process o f list­ ing colors of things that fly, you said George Washington threw a silver dollar across the Delaware. Washington crossed the Dela­ ware, but he threw his silver dollar across the Potomac. In the future, please consult a historian before providing us with errone­ ous information again. Thank you. Rudy in Miami Township Dear Rudy: You are correct, of course. George Washington did throw his pocket change across the Potomac. It was Martha Washing­ ton who threw George's wooden teeth across the Delaware, when she discovered that George had been out fathering our country. Jake *. * * Dear lake: Is there any explanation for the reluc­ Advice for the Propworn tance on the part of Dutch aircraft designers to abandon their traditional Goettingen air­ foils and move on to the more advanced as being naturally present in a newly con­ Many modelers don't see satisfactory sections such as Wortmann or Whitcomb, structed framework. results because they have not stored the whose performances benefits have been Method #1: Pressure induction is difficult aerions properly before application. In free clearly demonstrated? to do uniform ly and requires an exact mat­ form their life is much, much shorter than Fluid Dynamicist in Frostport ing form and a fairly expensive press. It is when impressed into a structure or applied Dear Fluid Dynamicist: just like the way Uncle Ben does it on his to it with the proper solution. Storage is The Dutch aviation industry may have a packages of rice when he presses in all difficult; putting them under your pillow, reputation for being somewhat behind the those vitamins—in fact, aerions are sort of however, works well. times, but other areas of Dutch research are like vitamins. Making a form for pressing I could send you some aerions if you at the forefront of technological advance­ vitamins into grains o f rice, however, is a lot want to try out my liquid application ment. Composites is one such area where simpler than making one to fit your air­ method, but realize, please, that they may the Dutch are showing the rest of the world plane. And sometimes the more fragile lose their strength in transportation. how it should be done. In a recent survey, structures don't look just right after the Ed in N.Y.C. 87 percent of all Dutchmen said they process. Most of us reject this method. Dear Ed: owned at least one pair of graphite shoes. Method #2: Liquid application is really I'm sorry, but I can't recommend your air­ Jake easy and works well. You first have to dis­ frame refurbishment techniques to * * * solve the aerions in a solution made up of modelers in general. A few experts might Dear lake: acetone, androcilicon extract, and a little make it work, but there are too many haz­ About those aerions that provide lift—I spit. This is applied quickly with a brush. ards associated with the process for me to agree with you, aerions do exist and are The solution evaporates fast and some of endorse it for anyone else. most important. Obviously, however, I the aerions are lost, but enough remain to I bought an aerosol spray can of aerions should discuss with you my method for do the job. Aerions are dangerous if in­ from Neiman-Marcus and tested your the­ reintroducing aerions into a decayed haled, (in 1983, Mr. Harlan Bedlow's nose ory. First of all, too many or the wrong kind airframe. absorbed so many aerions that it rose to the of aerions (Rh positive instead of negative) There are two methods: the first by pres­ center of his forehead and stayed there) so a could alter the molecular structure of your sure induction and the second by liquid ap­ mask should be used and there should be airplane. When I sprayed a second coat on plication. Perhaps you haven't realized that very good ventilation. The aerions can also aerions are available in a free form as well be dissolved in dope and applied similarly. Con tinued on page 70

NOVEMBER 1986 7 OVER THE COUNTER All material published in "Over the Counter" is quoted or paraphrased from press releases, furnished by the manufacturers and/or their advertising agencies, unless otherwise speci­ fied. The review and/or description of any product by MB does not constitute an endorsemen t o f that produc t, nor any assur­ ance as to its safety or performance by MB.

• Let's begin our look at new products this month with a visit to the book shelf, where we find the new 1987 Zenith Aviation Books catalog. W ith more than 400 new ti­ tles included, the '87 catalog should have more than just a few books to interest the aviation nut. In addition to more than 3,000 aviation-related books listed, there are many video tapes available as well. One of the new book titles is Northrop F-5/F-20, a comprehensive look at the Top Gun's chase plane, one of the world's most advanced military jets. Also featured is the F-20 Tiger- shark, billed as "Chuck Yeager's favorite fighter jet." Learn all about this first combat plane built without a government contract. More than 100 photos, including 8 pages of color, show you these planes inside and out, with closeup views of cockpits, weapons, and markings. If you are planning a model of one of these jets, this is the book to have for your documentation. You'll find Cox Hobbies' Eagle II Sailplane for R/C flight. it, along with 3,000 other books and tapes, in the new 1987 Zenith Aviation Books cata­ programmed into the Galaxy Computer. All helicopter version as well. For more infor­ log. It's free from Zenith Aviation Books, control adjustments are input through an mation on this radio system, contact Circus Box 2MB, Osceola, Wisconsin 54020. easy to use key pad, and are displayed on Hobbies, 3132 S. Highland Dr., Las Vegas, * * * the LCD readout on the front of the radio. Nevada 89109. Circus Hobbies has introduced the latest The Galaxy Computer 8 features 8 chan­ * * * in R/C radios with the Galaxy Computer 8 nels with servo reversing on all channels, a Davey Systems Corporation has designed Multi-Function Micro Computer Radio fail-safe system for battery and signal loss, a new convertible kit for either 05 electric Control System.(What a mouthful!) It is stop watch, alarm timer, 5-year lithium bat­ or .20 four-stroke flight. Called the Caliph, claimed that the Galaxy Computer 8 is the tery for CPU memory backup, PCM and this sport/trainer features simple construc­ first transmitter that can handle seven com­ PPM transmission, full NiCd batteries with tion, step-by-step instructions, full-size pletely different models by entering all the charger, 4 JR4001 servos with trays and rolled plans and machine and die-cut details about each model. After program­ mounting hardware, direct servo controller selected balsa and plywood. Inside the box ming such essentials as trim positions and cord, servo extensions, and operating you'll find sheet balsa fuselage sides, rud­ function code, you need only select that manual. The Galaxy is available in mode 1 der and elevator, as well as formed landing code and then fly any model you've or mode 2 in a pattern version, and a gear and hardware. The Caliph has a 48-

Zenith Aviation Books' new 1987 catalog. Electric or four-stroke Caliph from Davey Systems Corporation.

8 MODEL BUILDER Control horns from DP Precision Molding. VL Products' electric motor and battery for free flight models. inch wingspan with 390 square inches of your plane. Each horn comes with four 3/4- Helicopter pilots are going to love this area, and a modifed Clark Y airfoil. You can inch long stainless steel Phillips head bolts new starter from Du-Bro Products. Called get the Caliph for only $44.95, at your for easy mounting. The bolts self-thread the Helicopter Sure Start, this starter allows hobby dealer, or write to Davey Systems, into the horn base providing an anti­ for "no pressure" starting procedure, and One Wood Lane, Malvern, Pennsylvania vibration mount. Prices for these new horns alignment of starter can be as much as 20 19355. are from $2.00 a pack for the unplated color ♦ * * nylon, to $3.00 a pack for the chrome- C ontinued on page 86 Now available for big bird fliers are these plated horns. Each package contains two new control horns from DP Precision Mold­ horns and mounting hardware. If ordering ing. These horns feature tough nylon in a T- by mail, include 75 cents for handling. base style, designed for 1/6 to 1/4 scale air­ Send your order to: DP Precision Molding, craft. Seven colors are available, including Dept. B, Box 20639, Columbus, Ohio blue, yellow, orange, red, white, gray, and 43220. black, to complement the color scheme of * * *

Attach Marketing’s Coast Guard Lifeboat

+ ______Sure Start helicopter starter from Du-Bro. Galaxy Compter 8 radio system from Circus. Astro Cobalt 60 FAI electric motor. NOVEMBER 1986 9 By A L A L M A N £ 1 *

ROCS 4th ANNUAL BIG BIRD BASH & more relaxing for the pilots and easier view- TEA SOCIAL ing for the spectators. Another safety Once again we were blessed with fantas­ precaution we stayed with was having a tic weather for the entire weekend. A steady qualified pilot act as safety observer for 10-knot breeze made the 80-degree days each flier. seem a lot cooler so, in spite of the cloud­ This year an even wider variety of air­ In case you decide to upgrade your Q-35 to a Q-40, this is the shortblock yo u 'll be using. less skies, over 1500 spectators (mostly fam­ planes showed up, including W W II ''heavy ilies) heeded our call and came to gawk, metal" and multi-engined birds. And not And the spectators really had BIG Bird ask questions, eat lotsa hot dogs and only were there a number of mighty fine fever; there were "oohs" and "aahs" and ap­ nachos, buy virtually all of our raffle tickets, looking BIG Birds on display, but spectators plause for virtually every flight, although and have one helluva good time. were also treated to some exceptionally THE hit of the fly-in had to be amiable Erv We also had a great pilot turnout; 47 fel­ good flying. It appears that many more Solberg doing his WWI routine, complete low BIG Bird lovers accepted our invitation builders have become proficient BIG Bind w ith handlebar mustache, Kaiser hat, and brought along 66 different flying fliers. monocle, scarf, long coat, sword, boots, machines. And this diversification is one of And all types of engines are now being walking stick, a BIG Fokker DR-1...and, of the many reasons that fly-ins have become used. Although a fair amount of converted course, a very real "Blue Max" hung around so popular with pilots and spectators alike. chain-saw and weed-trimmer engines are his neck. And nobody enjoys this little skit Because these get-togethers are low-key still providing the power, many of the bigger any more than Erv, himself...in spite of his and give pilots a chance to really socialize two-cycle glow engines like the 1.08 Boxcar, having to wear a long coat on pretty hot and share their knowledge, there's no need Super Tigre, OPS, Bully, and Super Tartan days. for competitively similar aircraft...so guys have also become favorites...as have the While taking pix I commented to him build whatever turns them on. 1.2s and twin four-strokers. about sweltering under that coat. "But this Every pilot received a copy of our field Apparently the advantages of throttled- isn't all that bad," he answered, a BIG grin and fly-in safety rules, and we had no com­ coupled spark-advance have also become showing through the sweat that streamed plaints. It's taken a few years, but now just evident because a number of both two- and down his face. "You should have been about everyone who's into building and fly­ four-cycle engines used this CH Electronics down there at Morgan Hill in California. ing biggies appreciates the need for airwor­ ignition system. And we even had three Now that's what I call HOT!" thiness inspections and eliminating any diesel-powered craft in the lineup, too. After shooting the bull with Erv for about taxiing into, or out of, the pit area. They've Some of the AMA Northwest Show Team 15 minutes, I suddenly realized that beside come to understand that each of us has the members who have BIG Birds (that meet being a genuinely down-right nice guy, he's right to expect every other pilot to be our engine/noise requirements) helped also a bit of a con man. Somehow he'd equally safety conscious. maintain spectator interest with a Snoopy talked me into having a Fokker D-VIII ready Once again only three planes were al­ bipe; an awesome, smokin' Chipmunk; and for next year's fly-in. Actually, he promised lowed in the air at one time, which didn’t a Senior Telemaster that proved to one and to help me put together an outfit just like his hamper anyone's flying; this rule makes it all that the tail can, indeed, wag the dog. so that we can do the W W I bit together,

Ron Kemp's Quadra-powered Byron Corsair, with Annco retracts. A ------" 1 : Ί* beautiful flyer, you can see her leap ahead when the gear retracts. A 3.7 Sachs-Dolmar handled Karl Hibb's 25-pound Chipmunk easily.

10 MODEL BUILDER Another scratchbuilt bird, a nine-foot, Zenoah G-38-powered Cessna Dave Weigandt's scratchbuilt Hiperbipe only weighed a tad over 17 180, by Steve Stephans. pounds, so the ST-3000 had no problem making it fly. which was an offer I couldn't refuse. O ur new control tower proved its worth on both Saturday and Sunday. It's amazing how much more positive control you have when high enough to see everything clearly and, of course, better control means a safer fly-in. In fact, the only safety problem that did come up was caused by two idiotic ultralight pilots who were tooling around late Sunday morning. At first they stayed well beyond the spectator side of the field...but then, even though they were low enough (about 800 feet) to see what we were doing, both congenital idiots flew into our flight area (which put an immediate stop to our flying) and proceeded to land on the north end of the active runway. Fortu­ nately one of our own guys, who is much Erv Solberg, complete with WWI uniform, including a "Blue Max" hanging around his neck, on Continued on page 94 his way to intercept a group of SE-5's with his trusty Fokker DR-1.

Hangar One Hobby's P-40 kitted with Ziroli's plans. It’s said to be a This A-36 Apachelno, it's not a P-51) probably won't be kitted by fine flyer. Hangar One Hobby. Too bad, it's a dandy airplane.

NOVEMBER 1986 11 DD CHATTE BY DICK GROSSMAN

• It is common to refer to the Hughes velop a new helicopter for this program. payloads. 300D, 500D, etc. in identifying those Boeing and Sikorsky are also joining forces I do a R/C helicopter demonstration there helicopters, but in so doing, we are being a in this project. It w ill be interesting (to put it every year. High winds made it tough on the little fast and loose with the name mildly) to see what kind of helicopter will full-size birds as well as my GMP Shuttle, "Hughes." That famous movie mogul, avia­ come out of this effort. 30 billion dollars which handled the wind well. It was amaz­ tion pioneer, inventor, and all around mys­ sure attracts a lot of attention! Bell and Boe­ ing to watch the Bell UH-1H Huey's doing tery man has long since departed the scene. ing are also working together in the devel­ spectacular hovering maneuvers in the high The helicopters bearing his name are still in opment of the V-22 OSPREY, a tilt rotor air- winds. I recently read Chickenbawk, by great abundance, but their parentage has plane/helicopter. In Europe similar projects Robert Mason, a book about helicopter fly­ changed considerably. One of the real are underway. Germany's MBB (Bo 105 etc.) ing in Vietnam, and the images from that workhorse helicopters is what we refer to as and Aerospatiable of France (Ecuriel, book made seeing those Huey's a bone- the Hughes 300C. It is a piston engine Gazelle, etc.) are planning a new attack chilling experience! machine, and as a model is offered by helicopter under a program referred to as THE NATS Gorham Model Products as a modified PAH-2. Britain, Spain, Italy, and the Nether­ The AMA National Championship was Cricket, by KKK (distributed by California lands are also in the light attack helicopter held in Lake Charles, Louisiana. First place Model Imports) with an ignition engine, market with the development of their in FAI was Curtis Youngblood of Bryan, and by Morley Helicopters as an inexpen­ TONAL helicopter, a combined effort of Texas. Curtis was flying a GMP Competitor. sive 40-size scale helicopter suitable as a Agusta, Westland, and Fokker. A close second was Robert Gorham with trainer. In 1982 Hughes Helicopters, Inc. If the significance of all this escapes you, his now famous GMP Cobra-Jet Ranger. sold their entire production of Hughes 300s what it means in my mind is that helicop­ Mike Mas of Miami, Florida, was third fly­ to Schweizer Aircraft, a small New York ters are now and w ill continue to be a major ing a Schluter Champion. Mike is a former company owned by Paul, Stuart, and Les factor in commercial and military aviation. national champion and is making a come­ Schweizer, who is currently manufacturing The new designs and technology are going back in competition after being retired for that machine. to make R/C model helicopters a very excit­ several years. The reason he retired was sim­ The next step in the Hughes chronology ing hobby for years to come. ple. When he was competing, no one else was the purchase of Hughes Helicopters, GLENVIEW had a chance to win! Ted Schoonard was Inc. by McDonnel Douglas. Production of A few of the pictures you see in this fourth flying his Schluter Champion. the 500 series including the 500 E and 530 month's column are from Aviation Expo, an Other results: is being continued by McDonnel Douglas open house held annually at the Glenview Intermediate: First—Michael Dance, M il- Helicopters Co. There's more to the story. Naval A ir Station at the Glenview Naval burn, George; Second—Michael Sedman, Hughes Aviation Co., a separate company, Base. This is a satellite event in conjunction Agoura, California; Third—Nick Black, was purchased by General Motors in De­ with the Chicago Air Show which is a week­ Muleshoe, Texas. cember 1985. Incidentally, McDonnel end of air demonstrations over Lake Michi­ Scale was won by Stephen Mintz of New Douglas manufacturers the AH-64 Apache gan viewed by hundred of thousands of Orleans, Louisiana. helicopter and is currently involved in a spectators lined up on the beaches, ip Based on the reports I received from a NOTAR project—the development of a boats, and from the downtown Chicago number of people, the National Helicopter helicopter resembling the Hughes 530, but skyscrapers. The show teams included the Championship was conducted under with no tail rotor! (Hence the name French Aerobatic team L'Escadrille flying deplorable conditions. The site selected NOTAR.) Alpha Jets, Biplane aerobatics, and helicop­ was a partially graded dirt field where some The most talked about project in the ter rescue demonstrations performed by grass had grown, power lines on one side, helicopter world is the U.S. Army's 30 bil­ Sikorsky H-52 Seaguard helicopters and some colosseum-like building on the lion dollar Light Helicopter Experimental equipped with flotation pods. Painted in other. It was so bad that 35 out of the 37 (LHX) program. McDonnel Douglas Heli­ the Navy orange and white, these graceful contestants signed a protest, and the copter and Bell Helicopter are working to­ birds land and takeoff on wheels using tran­ helicopter contestants were permitted to gether under the name SUPERTEAM to de­ sitional lift to allow them to carry greater secure a better field if they could find one.

Sikorsky H -52 Flying Life Boat returns from air-sea rescue demon­ A Navy Huey performing at the recent Glenview Air Show. stration in Lake Michigan.

12 MODEL BUILDER Hughes-Schweizer 300C owned by Omniflight Aviation flies the traf­ Merlyn Graves demonstrates nose-in hovering the hard way with his fic reporter for station WGN. Schluter Champion. They borrowed the flying field of the local facturing, maker of Tru-Spin rotor blades, Vibration is nature's way of telling you that model airplane club. The temperature got and an assortment of replacement cano­ your helicopter isn't built right. There are a up over 110 during the day—as you might pies, main shafts, blade weighting and cov­ lot of things that you should do while you're expect in Louisiana in the middle of sum­ ering material, and many other helicopter building so that the end result will be a mer. Incidentally, several of the contestants products. His rotor blades are sold by the smooth-flying machine. We'll talk about had radio failures which they suspect was thousands all over the country. They are those another time. Let's start from the caused by keeping the radios in the aircon- well-made and less expensive than the finished product, a helicopter with the ditioned motel rooms all night and then OEM and imported blades sold. But all any­ shakes, and work back. Vibration is the bringing them out into the severe heat. body talks or writes about (myself included) symptom, poor alignment is the disease. I recall that in the 1985 Nats, the contes­ are the exotic and expensive blades im­ Once the helicopter is together, it is difficult tants were forced to compete on a field that ported from Germany, Japan, and Sweden. to use mechanical measuring devices to was slanted, overgrown with grass, and at a Curtis Youngblood put a set on his GMP find the problem. Use your eyes! Did you remote site not contiguous to the rest of the Competitor, and went out and won the Na­ ever look at a picture drawn by a poor artist? contest. I think it's time for some letter tional Helicopter Championship! Gener­ Remember how apparent even minor errors writing! ally, the percentage of people who can in size, proportion, and perspective be­ EMPENNAGE really discern the difference in blade air­ come, even to an untrained eye. You can Horizontal and vertical stabilizers on full- foils, center-of-gravity, and the like, are use the same ability to zero in on your size helicopters have important aerody­ found in the same frequency as those who vibration problem. namic functions. On our models they seem can distinguish between 1961 Chateau La- (1) Main rotor blade balance. This should to be more cosmetic than anything. The ver­ fitte Rothschild and El California Cheapo. I have been done when you built the tical fin can be designed to protect the tail have used the Tru-Spin blades since they helicopter, but you're at the flying field now. rotor; the horizontal fin seems to have a first came out three years ago, and I am still Remove the rotor head and lock the blades very minor effect on flight, and many fliers using the first set I owned! down by tightening the pivot bolts. Lift the omit it entirely. The blade is straight, the airfoil seems to rotor head by the flybar and cradle it on Rotary Wing Concepts sells a fiberglass work well, and they are strong. I have never your forefingers. It should hang with both vertical and horizontal stab, with a seen one split. Jeff says he used the stron­ blades exactly the same height. Let your threaded aluminum clamp. Intended as a gest resin available, FAA approved for eyes wander and pick out reference points replacement for the wood fins used on the home-built, full-scale aircraft! Yale has a that are horizontal like the floor, buildings, GMP Cobra and Competitor, I'm sure they complete line of OEM replacement blades, the horizon. Your brain w ill tell you if one would work with other helicopters as well. shafts, canopies, and many other items— blade is lower than the other. Add some They also have their own boom support and they're made in the good old U.S. of A., tape to the higher blade until it comes into clamp. For further information, contact and couldn't care less about what the Yen or position. your hobby shop or Rotary Wing Concepts, Deutschmark is doing. (2) Static coning. Put the rotor head back 1201-D Alex Road, W. Carrollton, Ohio VIB-B-B-B-RATION. What causes it? on the helicopter. Set it on a table and spin 45449, (513)866-6104. the blades with your hand. Use some ob­ FOREIGN INTRIGUE ject in the background as a reference point Big things are happening in the model for the tip of the blades. Your eye w ill helicopter world! In Germany the Graupner quickly tell you if one blade is passing that firm has taken over the worldwide distribu­ point higher or lower than the other. tion of the Heim helicopters, and has made (3) Flybar balance. After flying your many improvements to that fine machine, helicopter, observe the position of the particularly in the area of packaging, in­ blades. If you can, lock them down without structions, and some improved compo­ disturbing that position. They may not be nents. The real blockbuster (excuse the parallel due to difference in the chordwise Freudian slip) is that Robbe, the gigantic CG between the two blades. W ith the rotor head on the helicopter "teeter" the flybar model and toy manufacturer has taken over on its pivot and try to determine if it is Schluter. If you've ever seen the quality of Robbe products, (or even just seen their balanced. If your rotor blades are not parallel, the flybar w ill need to be weighted catalog) you have to be excited over this. on the side of the larger angle formed by the Miniature Aircraft of Orlando, Florida, will be handling many of the Robbe blades to correct the "dynamic balance" of the rotor head. helicopters as well as Schluter and Heim. (4) Start shaft. If your helicopter has a HE D O N T GET NO RESPECT start shaft, hold the starting cone between Maybe now Jeff Urcan w ill get a little re­ Yale weight kit is non-metallic, weighted epoxy spect. Jeff is president of Vale Hobby Manu­ for adding weight to rotor blades. Con tinned on page 78

NOVEMBER 1986 13 static. Five of the top ten models were biplanes, with four of those being early vintage. In the U.S., WWI biplanes with under­ cambered wings are not universally popu­ lar in R/C competitions, mainly because of their ground handling characteristics and their vulnerability to wind conditions. The difference between U.S. competitions and World Championships, however, is that in the U.S., concessions are not made for these models. They must compete on an equal basis with all other model types, tak­ ing off and flying their pattern down the designated runway, even if it is crosswind. At World Scale Championships, however, it FAI WORLD SCALE CHAMPIONSHIPS fortable and on time. seems the runway is moved to accommo­ W orld Scale Championships are or­ The bad news is that we finished a bit date these models, even if it is at the disad­ ganized through the FAI (Federation Aer­ lower in the competition than we had antich vantage of the other model types. We actu­ onautic Internationale) to provide interna­ ipated. As I've reported previously, the R/C ally found ourselves flying across the tional, nonpartisan competition in scale team was entering the competition with 100-foot crowned width of this 4,000-foot modeling. World Championships are held what are considered "high complexity bo­ long runway rather than down it because every two years, hosted by volunteering nus" models; Skip Mast's 30% bonus C-130, there was a light crosswind which the countries. Steve Sauger's 25% bonus Stinson Trimotor, judges felt was unnegotiable by the light The 9th World Scale Championship in and my own 20% bonus SM-81. Surprisr biplane models! Yes, you can fly a model off FAI Scale was hosted by the Norwegian ingly, the formula required for success was a 100-foot paved, crowned runway, but if Aero Club at Kjeller Airport near Oslo, Nor­ not high complexity, but rather, moderat^ you're flying anything other than a "floater" way. Kjeller Airfield is an active Norwegian complexity, light wing loading, and high it's impossible to make takeoffs and land­ military facility with a 4,000 foot paved run­ ings look scale. way available for our use. M ilitary activities Overall, the quality of the models in the were curtailed during the event, mainly be­ competition was by far the highest I've seen cause most of the military personnel were anywhere. It's common to make compari­ away on vacation! sons w ith the models seen at Scale masters For the United States team, it was the old competitions here in the States, and using good news—bad news story. The good that as a reference, I don't think I'd be far off news was that because of the efforts of many saying that only a small percentage of the hard-working individuals (Nino Dironza of models seen at a Scale Masters finals would AMA Travel Service, Tony Ristuccia and approach the static quality of the models Nick Capriotti of the New York area, and seen in Norway. That should not be inter­ Narve Jensen of the Norwegian Aero Club), preted as being a knock at the Scale our travel arrangements and movement of Masters. On the contrary, I mean it as a our model boxes went nearly without a compliment. I feel that we have at least a hitch. I say nearly, because I did have the half-dozen modelers active in Scale misfortune of having my catalog case filled Masters competitions at the present time with support equipment (starter, battery, who could be World Champion in Scale if Dremel, tools, etc.) permanently "mis­ they chose to participate in FAI competi­ placed" by the airlines on the way over to tion. Perhaps some of them w ill do so in the Oslo. I suppose it's just one of those things future with the coming changes in com­ you must expect every so often if you're go­ plexity bonuses and weight limits. ing to travel by air. SAS was so good to us in The winner and new World Champion is the rest of our travel arrangements that I Max Merkensch lager of Germany. Max was can't fault them too much for the loss of my Phillip Avonds of Belgium deserves to smile competing with a Bristol "Scout" which case. They moved our model boxes for us as about this F-15 Eagle; it placed sixth in the was immaculate. It appeared to be modeled world scale champs, despite inconsistent baggage, saving a enormous sum for AMA, engine runs. Model features twin K&B 7.5s after an aircraft in a museum, since it fea­ and the flights themselves were most com­ in m odified Turbax fan units. tured no weathering and was in a "factory

Take a look at how natural the Gemini Twin 1.20 looks in Austalian This is how complex it can get guys! Young(21) Jurgen Steinberger Lloyd Oipple's Fly Baby. The model is 1/4 scale, and Lloyd made of Germany placed seventh with this beautiful BE 2e biplane. It is the extra cylinder head covers from a m old made from the originals. scary to risk craftsmanship like this in the air!

14 MODEL BUILDER Ninth-place winner in Control Line was Ron Sear's PT-17 Stearman. This is the second world's championships for this model, and it’s The winner and champion! The first place Bristol Scout of Germany's still going strong. Based on the Sterling kit, and highly modified. Max Merkenschlager putts away after takeoff. new" condition. Max flew the model as if it lip's bid for a higher placing was thwarted. lems that both Skip and I experienced, I was on rails, even in a stiff wind. It was sur­ One of the favorite models among the ended up in twenty-second place among prising to many competitors to see a lightly competitors was our own Steven Sauger's the 47 entrants. Perhaps I should start prac­ loaded model with an undercambered air­ Stinson A-1 Trimotor. Although Steve ticing what I preach and just keep it simple foil penetrate as if it had a thick, non-scale received a very good static score, it could scale! airfoil. have been even higher with improved color In R/C, we finished fifth among the 17 documentation. Steve flew as well as I've countries entered, so that isn't too bad. We The Swiss team took first place as a coun­ ever seen him fly, finishing in 10th place had anticipated heavy competition from try with some outstanding models. Hans- overall and leading the U.S. team. the Russians and the Japanese, two new en­ ruedi Zeller flew his well-known DeHavil- Skip Mast's C-130 "Flercules" was a real trants to FAI F4C, but the Russians decided land 88 "Comet" to second place with a crowd pleaser. Everyone kept asking "when to pull out at the last minute, and the good static and some outstanding flying. is the four-engined model going to fly?" Japanese team was new to FAI F4C and is Konrad Oetiker, the third place finisher, Skip placed a very respectable fourteenth apparently still on a "learning curve." Their received the top static score of the competi­ with a good static and quite good flight models were very good, and after a shaky tion with his Bucker 133C "Jungmeister." scores. The SM-81? Well, a mediocre static start, they flew quite well, but I get the feel- Peter Mueller received very high static score made it difficult to be competitive for points for his Grumman FM-2 "Wildcat," me, and combined with the engine prob­ Con tinned on page 80 but the lack of a really good flight kept him down to the 13th spot. Ducted fan models are becoming more common at World Championships since our own Charlie Chambers first flew his "Cougar" at Reno in 1982. This year, Phillip Avonds of Belgium wowed them with his twin ducted fan model of an F-15 "Eagle." A large model, it was within the FAI 6 Kilo­ gram (13.2 lbs.) weight limit, and Phillip demonstrated that it could fly even on only one of the modified Turbax K&B 7.5 fan units. Phillip received a well-deserved high static score for the model and proceeded to make his first flight of the competition his maiden flight! Unfortunately, on his last flight, one of the 7.5s decided it was time for the forward portion of the crankshaft to part Number two in the world, this DeHavilland 88 Comet was built by Hansruedi Zeller of Switzer­ company with the rear portion, and Phil­ land. Twin four-strokes and Zeller's talents guided the Comet in realistic flight •rrj

Like everyone else, the Japanese team really liked Steve Sauger's S tin­ The American team: Julie Abel, Jeff Perez. Ron Sears, Mike Gretz, son A-1 Trim otor. Here they try for the best camera angles, getting Dolly Wischer, Steve Sauger, Skip Mast, and Cliff Tacie. closeups of Steve's excellent craftsmanship.

NOVEMBER 1986 15 watched him tune in this plane from the first flight. The major change that trans­ formed it from an easy-going clim ber to the 7TRIC express climber was the prop rework. Jack takes standard 16-to 18-inch props and then carves them to a thin undercamber. Then watch out, up it goes! If you are flying a gear on belt drive, this is the way to go for extra POWER performance, the undercambered props really perform. O f course, the Keller 50/24 By MITCH POLING on eighteen cells is pretty potent too! Jack's work is immaculate, the plane is a pleasure to look at, like a piece of finely worked furniture. Electrics make a fine piece of art as well as fly well, I even displayed one of my • The Boeing Hawks Annual Electric Fly-In big, and you are fooled into thinking that it planes in an art show! There is something was June 28 and 29 this year, in Seattle. w ill just gently climb into the sky like a bal­ that looks "alive" about a well-made elec­ Seattle is notorious for wet, cold summers, loon. It ain't so! It leaps off the runway in tric, as contrasted to the "mechanical" look and the meet was no exception! We did get about eight feet, and then Jack points it up of gas planes. Other machines have this live some sun breaks on Saturday, but we also at 45 degrees, and it goes up like an express! look too, in full-scale machines I would got some rain breaks too! Sunday was bet­ elevator. It can stay in that 45-degree climb choose the 1936 Cord automobile and the ter, I even got a sunburn. Here is Bernard forever, it seems, and in 30 seconds Jack is DC-3. Well, enough philosophizing! Cawley's report on the results: up near 800 feet, in 45 seconds he is over a\ And, speaking of art, Bruce Klees takes it There were 22 entrants for the two days, thousand feet. He is competing against gas al I the way, with the wing of his Electraglide 19 on Saturday, and 8 on Sunday, with one old timers in the local contests, and w in­ II. It has a panoramic painting of the moun­ to four planes per entrant. Bruce Klees ning. I think they w ill change the rules! Jack tain range around his flying field in An­ came all the way from Anchorage, Alaska, is a very skilled builder and flyer, and I have chorage, Alaska. He had an Anchorage art- and Craig Christensen all the way from Minnesota. The planes ranged in size from 153 squares and 18 ounces to 1/40 squares and 7 pounds. There were sport planes, old timers, scale, sailplanes, seaplanes, and sport pattern. Quite a variety! The awards were as follows: Most impressive (by entrant's vote)— Saturday: lack Hewes' 1,000 square-inch Privateer powered by a Keller 50/24 on 18 sub C cells. Sunday: Ben Almojuelas Electra Sportster powered by an Astro cobalt 15. Longest flight — Saturday: 28:15, by Craig Christensen of Lakeville, Minnesota, flying an Astro cobalt 40-powered Olympian. Sunday: 33:15 by A l Weber o f Surrey, British Columbia, flying a Mabuchi RX-540 pow­ ered Olympic 850 (Airtronics). Jerry Holcomb's Sea Pig seen at the Boeing Hawks Electric Fly-In. Although it rained, it wasn't enough for the Pig to land in, so Jerry opted to land on the grass-successfully! Most aerobatic — Saturday: Ben Almojuela and his cobalt 15- powered Electra Sportster. Sunday: Dave Katagiri and his Astro cobalt 05 Uno pylon racer. Longest distance traveled—Bruce Klees, from Anchorage, Alaska. He brought an Electraglide II which had a beautiful moun­ tain scene painted on the top of the wing. Best crash to Lee Urbaniak o f Cheney, Washington, whose Astro Sport lost an ar­ gument with our runway. Thanks are due to the sponsors, includ­ ing the Boeing Hawks, Astro Flight, SR Bat­ teries, Holley's Silent Flight, Adams Elec­ tronics, and Cox Hobbies. Because of their generosity, we broke even financially and had more prizes than entrants. Plans are al­ ready being made for next year, with some low key competitive events scheduled as well as the fun-fly events. In general, we all enjoyed, at least in between rain showers and cold wind! Thanks, Bernard for the report. There were some very interesting planes at the meet, so here are some of my impressions: The most impressive plane was undoubt­ Scale lineup at the Boeing Fly -In: Ben Almojuela's Monocoupe, Jerry Holcomb's Guppy, Al edly Jack Hewes' Privateer. This plane is Weber's Porterfield, and an Aeronca from a Comet kit. 16 MODEL BUILDER Jack Hewes' big Privateer ain't slow! Keller 5 0 /2 4 on 18 cells has won Bruce Klees and his mountain art, reflecting the scene around his against gas old timers in local meets. Undercambered prop helps. Anchorage. Alaska flying site. Too pretty to fly! ist paint it for him, and it is certainly output transistor. A relay is used for no soar beautifully if there are any thermals. dramatic! The plane flies well too, though I power loss at the top end. Al has this down Most flights were over six minutes. It han­ might hesitate to risk the painting! to a fine art, his speed controls run very dles wind very well for such a small plane. Jerry Holcomb's planes are always im­ cool. Mine weighs 28 ounces with a Cannon re­ pressive, his Sea Pig attracted a lot of atten­ There were three ready-to-fly models ceiver, two S22 World Engine servos, and a tion. It flies very smoothly on the Kyosho there, and all turned in impressive perfor­ 175 mah SR Battery receiver pack. The 240 LeMans prop drive. This is an excellent mances. The Etude is familiar to all by now, power is a geared 035 turning a special prop drive, the LeMans units are well-made, and is an excellent introduction to electrics prop, which is very thin and undercam­ the brushes on the LeMans motors are ac­ for R/C fliers (beginners should have help). bered. This prop is very efficient, and really cessible and use pigtails and independent The Zero is new, and it is surprisingly good. makes the performance of the plane. The springs, and the motors are designed for It flies quite well on the stock 240 LeMans battery pack is six 600 mah Sanyo cells. I high efficiency. drive, but then on Sunday (sorry, I didn't get peak-charge my packs, so I routinely get 5 These motors represent the state of the art the flier's name!) it was flown with a geared to 6 minutes on this plane. Bob Aberle in ferrite 05 motors. I recommend them if Astro cobalt 05 on seven 800 cells driving a tested the same plane for Flying Models you need extra power but are not prepared 9 x 6 prop. That really made it come alive! It magazine and was getting only 2-1/2 to 3 to use cobalt motors. They are drop-in re­ likes to fly fast, do not let it slow down. minutes, but I think this was a combination placements in size and mounting for most When it slows down, it sinks rapidly. All the of overweight (32 ounces, using a large ra­ commercial 05 motors. Jerry, by the way, takeoffs were hand launched, as the plane dio) and undercharging. The stock charger landed on the grass; a flying boat does this wants to ground loop, and once the plane supplied with the plane may be set up for very well. Not so for float planes, I proved accelerates, it flew like gas, fast and aero­ 20 minutes or longer charges, which is that a couple of years ago at this electric fly. batic. Landings are best fast, with a wheel conservative. You go head-over-heels! Jerry uses his elec­ landing, not three point. Three-point land­ Last, and not least, I award the "stiff upper trics to test concepts for full-size, home- ings are rough. I think that the plane would lip" award to Craig Christensen, who built planes. This one, with its wing tip really be potent with an Astro cobalt 15 on watched his beautiful cobalt 05 glider with wing floats and generally simple lines, direct drive on ten cells, probably on a 9 x 6 an expensive Futaba PCM receiver fly away looks like a natural for a home-built. prop. Vertical performance should be very to the east. If any of you live in the Seattle Electrics do make very good proof of con­ good then. In flight, the Zero looks real, it is area, and have heard of this glider being cept models for full-scale. The power-to- a very satisfying scale plane. Not bad for a found, please contact me at (206)524-9706 weight ratio and the flying style is very simi­ plane that assembles in less than two hours! or Bernard Cawley at (206)655-7183. The lar. Jerry flew the Guppy too, which uses a I flew the MRC Cessna 172, which is a only theory for why this happened was that belt drive 035 but it needs more power, a ready-to-fly from MRC. It assembles in less the glider was quite far away, and a stall cobalt 020 from Astro would make it really than two hours, and it flies so well that it started loss of control, then the fly away. We come alive. The Guppy does make an ex­ was nearly voted the most impressive air­ cellent electric, Tony Naccarato proved that plane on Sunday! It climbs quickly, and w ill Con tinued on page 74 several years ago with his indoor electric Guppy. Ben Almojuela once again showed how smooth and aerobatic his Electra Sportster is with an Astro cobalt 15. This is an abso­ lutely natural combination, the Sportster is designed by Hal DeBolt, a really pro designer, and the plans are available from Model Aviation magazine. The plans show a cobalt 05, but I strongly recommend the cobalt 15 instead. Ben also flew his Monocoupe scale plane, it flew very nicely on a geared cobalt 15. This is based on the Sterling kit, but with light balsa and mini­ mum plywood. Al Weber flew the Astro Porterfield, he found that with a larger wing and thicker airfoil, the Porterfield w ill soar very nicely, and on Sunday he proceeded to prove it. The stock airfoil is a bit thin, if you wish more soaring ability, thicken it to 127o. Al also showed off his latest version of servo amplifier speed controls, this one featured The unknown flier and his electric Zero. With an Astro cobalt 05 for power, it flies real fast- optoisolation, and, of course, a Darlington but sinks rapidly when slowed up. Flies like a gassy, fast and aerobatic.

NOVEMBER 1986 17 pun—MUST be April!) with charged and otherwise healthy batteries. He then goes on to describe his personal experience, in­ cluding one model which sat for five years which, when examined had the plague. Others, much older, but in constant use, were luckier in being corrosion free. He at­ tributes this to his habit of keeping all Ni- Cds freshly charged, with those not in ac­ tual flying use being given a topping off charge every three months. I do remember now that a lot of the cases I have seen of this possible fatal malady were in equipment in which the batteries were completely dead, due to having sat for long periods of time. But I can't really say that such was the case at all times. It is something with which I can experiment and which I intend to do. I can't report the L3 J a 3 i j * 3 4 k l l 3 3 results in the next issue, it'll take longer than that, but as of now I have some Ni-Cds on constant trickle, and some attached to a By ELOY MAREZ load, some connected with black, and ' 3 3 5 * 3 3 5 * others with other colored wires, being dropped down to zero volts. We'll see what time tells us. • THE SAGA OF THE CORRODED BLACK I can see that instead of referring to this WEE R/C WIRE continues. In our August column, we malady as black wire corrosion, I should be Not too long ago, I put out a call for infor­ included some information that came to us doing so as "negative wire corrosion." Actu­ mation on how to build actuators—and from Ian McQueen in Japan. There is yet ally, and I remember mentioning this once stated then that I have complete faith in my more input on the subject, the first being before, the first place I ever saw this readers, and that we'd soon have such infor­ from the aforementioned, Mr. McQueen. phenomenon was in O rbit reed equip­ mation. Sho 'nuff, the same T. O ff men­ Ian has done further research on the sub­ ment, all of which used blue wire for the tioned above sent in some information, ject, and has put together a three-page negative leads. The fact that Beno has ex­ gleaned also from British publications. Co­ paper on it. He feels that the problem is perienced this problem in his JR transmitter, pies are available to YOU—and to YOU, for caused by the chemical makeup of the which, in a complete deviation from all the usual SASE. Being copies of copies, the black insulation, a point which I do not electronic industry standards, uses brown photos w ill not be too clear, but the dia­ agree with. Anyway, there are valid reasons wire for the negative lead, makes me even grams, schematics, and text are; and I’m for why we each think what we do, and Ian less reluctant to accept the McQueen the­ sure the actuators can be duplicated by any­ is making his findings available to all of us. ory about the black insulation. one with a little ambition. His treatise on the subject is available to MORE ON THE SUBJECT OF NEGATIVE Ted closes his letter with a comment any of you that wish to pursue the matter, WIRE CORROSION comes from Ted Off, which we have proven here in the pages of either directly from him at 2-18-7 Kami- Ventura, California, who signs himself"T. EC: “Obviously, pulse is not dead." Meguro, Meguro-ku, Tokyo 153, Japan, or Off!" I love it! Anywho, Mr. T. sent in a copy Amen—and long live all you tinkerers! for a SASE, directly from me. of some words on the subject by a Mr. Dave MORE FOR WEE R/C'ERS! THE NEXT INPUT ON BLACK WIRE Day, (D. Day?) (Is this the April issue?), w rit­ Some months ago, I discussed the prac­ CORROSION comes from Beno E. Echerd, ing in the British RCM&E magazine. His tice of dissecting nine-volt (actually, 8.4 of South Padre Island, Texas, which is close writing adds another quite interesting bit of volt) rechargeable Ni-Cd batteries in order to my home of Corpus Christi. Beno writes: data to be considered; one which I had not to obtain some super-small and lightweight "I read your article on 'Black Wire Corro­ previously thought of, but which I can cells to be made into packs for small air­ sion' in the August 1986 Model Builder support. plane use. As I remember, these batteries, with great interest. In my case, it was Mr. Day writes that he has worked as an and thus the cells themselves, are rated at “brown wire' and the unit was a JR Century R/C repair technician, and has seen many 70 to 80 milliamps, which is not bad at all VII. . ." cases of black, er, negative, wire considering the size. Beno then goes on to describe the spread corrosion—all accompanied by dead flat Well, along comes an improvement— of this corrosion, leading to a prohibitively Ni-Cds. He further states that he has not expensive repair. seen the condition in connection (BAD Con tinued on page 82

Just a few of the many Ni-Cd battery configurations available from a The B&P Associates strap-on Ni-Cd battery pack for electric starters. new supplier, B&P Associates from Deep in the Heart of Texas. T w o versions are available, w ith your choice of 4.0 or 7 .0 amp cells.

18 MODEL BUILDER The FOOTROT FLIER By JOHN REID. . .An extremely simple electric free flight with R/C assist through rudder control, this model comes to us from New Zealand. Its namesake is a deservedly obscure local comic strip. Why not build one? • The Footrot Flier is designed for rudder- many converted free flight designs, this can designs like the Rudderbug and Trixter only, radio-assist, "freeflight." be the beginning of a series of stalls. An ex­ Beam, by a high thrust line/low C.G. This is It is possible to add a rudder to most free pert knows to turn again out of the stall but not quite the same as just adding down- flight power models, but the dream of steer­ the result is still an untidy flight pattern. The thrust! The effect of the low C.G. increases ing serenely about the sky in search of ther­ most common compromise is a nose-heavy as the nose rises and speed drops—when a mals isn't always realized. Rudder-only trim that looks anything but serene. stall threatens, in fact. The Footrot Flier co­ models tend to nose up after a turn. For Power stalling was reduced in early R/C pies this layout. It can be trimmed to fly quite slowly and won't stall under power unless severely provoked. Some rudder-only models simply refuse to turn out of a stall. The rudder seems to stop working at the crucial moment. The cause is usually blanketing of the rudder by the turbulent slipstream from the nearly stalled center part of the wing. Washout only makes this condition worse, locking the aircraft into straight flight earlier. The rudder of the Footrot Flier is carried well down into the clean air beneath the tail- plane. There is always plenty of rudder re­ sponse. A "Findragger" layout would make even more sense, I suppose. Rudder-only landings are a bit firm at the best of times. Wind velocity gradient near the ground is the reason. (Downwind land­ ings are smooth with a nice flare-out!) So, to avoid bent landing gear and reduce loads on the fuselage (thus allowing lighter struc­ ture), a torsion-bar spring is incorporated. Motor is an Astro 020, connected to the circuit by a 10-amp fuse. This makes a simple on-off This sounds sophisticated but is the sim­ switch, and protects the motor armature as well. A simple and clever solution. plest, wire-bent landing gear you can imag-

NOVEMBER 1986 19 20 FULL-SIZE PLANS AVAILABLE-SEE PAGE 106 MODEL BUILDER mainspars which go in later), and the ribs to the building board. Tilt the center ribs using the dihedral template. The trailing edges glue to the top of the ribs; make sure that they are sitting right down on the washout template and the ribs. Now add the top spars, the main extending to the center rib, the small ones only to the edge of the sheet­ ing. Fit the top sheeting now and let every­ thing harden for a while. I hope you used a length of cellulose tape on the plan at the leading edge, and along the washout template so that you can re­ move the wings from the board. If so, add the bottom mainspars (right to the center ribs), and the outer part of the wingtip ribs, which are not cut out for spars. Fasten the wings to the board and washout template again, w hile the glue hardens. Sand the wings to remove glue lumps that would show through the covering. Cover each individual wing at this stage. Water shrink and apply three coats of thinned The Footrot Flier passes its torture test w ith flying colors. . .landing gear is capable of sustaining dope, elasticised with Castor oil. Fasten considerable force when subjected to the Adidas stress test, standard procedure in New Zealand. down the wings, for the last time, and leave until the rest of the construction is finished. ine. Look at the plan. This landing gear is so CONSTRUCTION Those wings won't warp. The two wings are flexible that, earlier in its career, when the Cut all the bits out first. Note that the epoxied together at the correct dihedral motor switch was located under the fuselage sides fit very economically on a with no further bracing. The center section fuselage, the Footrot Flier would sometimes four-inch wide sheet. The tailplane mount of the original model was a bit different, but turn itself off when landing. triangles are added later so that the top the way shown here is lighter and simpler. The model in the photos is over five years edge of the sides can be aligned with oppo­ FUSELAGE old. The tissue is faded and patched, but no site edges of the sheet. If the front ends of Now the fuselage. Join the sides at the structural repairs have ever been needed. each side are at opposite ends of the sheet, bulkheads squaring carefully. Join the rear the bottom rear edge of each side forms a After hundreds of flights, it still climbs up to of the fuselage sides and sheet the bottom thermal height on the original Astro 020 common line. Think about it and save from 1/4-inch behind FI (so that the landing and cells. As far as my eyesight permits. Not balsa! Just take care that there is not too gear can be fitted later), to the back, grain that I manage to find thermals very often, much variation in density across the sheet, cross-ways. which w ill result in unbalanced sides. but the Footrot Flier does 5 to 6 minutes RADIO anyway. Glue the tailplane mount triangles and This is the time to install the radio. I used the three 1/8-square rear stiffeners on each Construction is very simple, but you must the smallest Ace Pulse Commander outfit, fuselage side. Make the bulkheads (ice for an installed weight of 2-1/2 oz. This gear always keep weight in mind as with any cream sticks w ill probably be right for FI), electric aircraft. Wood sections are fairly is a delight, but I'm not sure whether it's still and glue on the stiffeners for the tailplane available. My disrespectful comrades at the small so medium density balsa is O.K., ex­ and fin. Put all this aside to dry and turn to cept for the tail surfaces, which should be flying field swear that the propeller is cos­ the wing. metic; the flapping rudder providing the light, and the wing top and bottom main- WING spars, which should be very firm (or spruce thrust. Make 18-inch washout templates with a The installation details on the plan are for if you intend to add elevator control). straight taper from 3/16-inch to zero. This Please order some tissue before you start. It this outfit. It is made into a “brick" which raises the rear of the outer ribs. Washout can be transfered from one model to an­ really is the only suitable covering material isn't usually needed with a low aspect ratio, for this type of aircraft. other, in moments. The aerial plugs into a rectangular wing planform. But it does Fahnstock clip, that is epoxied to the inside Be sparing with glue, which is heavy. If make the stall even more gentle, which is of the cabin. A lump of plastic foam, under you use cyano the building sequence welcome if the rudder is placed where it the wing, holds the whole thing in place. doesn't matter. Otherwise follow the se­ won't be blanketed! The slide switch is mounted sideways on quence below to avoid delays while glue Fasten the leading edges, the center bot­ hardens. tom sheeting (leaving a gap for the lower C ontinued on page 84

Rudder control on the Flier. A uthor used Ace Pulse Commander for Comic strip characters Wal' and his dog adorn the cabin of the Footrot control, on-board weight only 2-1/2 ounces. Keep it light! Flier. Author taught himself to fly R/C with similar model.

NOVEMBER 1986 21 Formula 1 fliers came from all over for the Nats. Dave Shadel. second from left in the front row, won with a perfect score. AT THE NATS By GEORGE P. BURDELL. . .Here's a casual look at the 60th National Model Airplane Contest, held this year at Lake Charles, Louisiana. Enthusiasm, along with the humidity, was high.

• This was the 60th National Model Air­ site's notoriety for intense, humid heat. homa, as well as the sites of earlier Nats. plane contest. It was held in late July and Maybe the sport fliers didn't all come, but Watching model builders at the Nats is early August in Lake Charles, Louisiana, and there was plenty of competition and en­ exceeded only by flying and competing we thought you'd like to see some of the thusiasm just the same. yourself; I think I'll start gluing sticks right historic model airplane action. This was And where w ill the 61st Nats be held? Lo­ now. . .how 'boutyou? · smaller than the average Nats, partly due to cations being considered are: Indianapolis, the location, and certainly partly due to the Indiana; Sebring, Florida; Muskogee, Okla­

The FAI F3D R/C Pylon event had competitors from Mexico, Great Britian, and the USA. The moment of truth comes when the starting clock runs down and the starters bring the racers to life. Above left, Bruce Richmond, from Dallas, holds his model, a Super Tigre X-40-pow ered Li'l Toni from Prather Products, with a Rev-Up prop, and Pro-Line radio. The pilot was Brian Richmond from Orlando, Florida, who recorded a one minute, twenty second flight. With Dub Jett on the engine, the team won the event by over 100 points ahead of the second place finishers.

22 MODEL BUILDER Tom D'Eville of New Orleans was the mechanic for his son, Greg A r­ Dennis Duvalle, from Indiana, and his brother Richard, from Idaho, cher, who finished fourth in 1/2A speed. Son has been flying since hadn't seen each other for over 10 years. Here they try to sort out 1982. Father has been model building since 1936; fifty years! problems in Dennis' Miss Dara UC stunt model. They did fix it too!

\ * *

The end of a fast pit stop in U /C Rat Racing. The view is through the AMA President John Grigg congratulates Abbie Olson for her second legs of Vic Garner, from Livermore, California. Fuel bottle is on the place in Junior Slow Combat. Proud dad, Mike Olson has been a mod­ left Left hand is electrified with the glow plug battery. This is prec­ eler for over 30 years. Mom holds Ί/2Α model overhead. At right, ision teamwork, more demanding than pilot-caller relationship in Aim ie Olson has been flying combat for seven years. Angela Olson in R/C Pylon. Vic finished fourth in this racing event. front is seven. Olsons came from North Dakota to fly at the Nats.

We found Duke Fox at the Com bat circles, signing large embroidered Right after clicking this picture, there was a snowstorm of foam as the jacket patches. Whatta treasure to take home from the '86 Nats! two models hit nose-to-nose, completely breaking up.

NOVEMBER 1986 23 Dorothy Odum, Marion, Illinois, with a gorgeous Outdoor Rubber Scale model ot an Earl Stahl 0-57 Taylorcraft. It flew great, but Dorothy was losing static points because she couldn't find any scale documentation. Dorothy got her AM A license in 1981, began building models in 1982. She'll be 60 years young on her next birthday. Her great-flying Taylorcraft was using 10 strands of 1/8 FAI rubber.

Tony Hutchins of Portland, Indiana finished second in Junior Payload with this Danny Murphy designed, ,020-powered model. Dad Bill Hutchins was Tony's mechanic. A t right, Tony test glides his m odel before launching on an official flight.

Raymond Audet, right, of Simsbury. Connecticut, flew this Goldrush Bryan Shadel. of Carlsbad, California, turned 11 at the '86 Nats. Here hand launched glider. His timer is Max Chernoff, who was at the 1933 he shows his C L model, which won him tw o second place plaques. It's Nats when Maxwell Bassett flew his Brown Jr.-powered model to rev­ a Cox TD ,049-powered racer. Bryan's model was timed for ten laps olutionize modeling. Max Chernoff is a retired computer scientist in 1/2A Profile, and he went 70 mph in 1/2A Speed competition.

Bill Zimmer from Varna, Illinois flew this Barnstormer in Old Time James Lee from Topeka fires up his Trixter A-B Tw in as son Todd Stunt. Used a '5 2 vintage Fox .35. Model was a Lew Andrews design. holds. Twin Fox .19s really hummed in Old Time Stunt event.

24 MODEL BUILDER Malinda Anderson, with her dad Fred, finished First in Senior C Gas. Her dad finished eighth in Payload. Check out dad's body english at launch!

Bob Schnieder of Houston, Texas, celebrated 50 years of modeling with this Monocoupe. Built from a Flyline kit of the Megowcoupe, Frank Thomas, of Niceville. Florida, helps six-year old Jimmy Namey its very first flight was an official. Model weighed 20 ounces. learn how to make a glider fly. Dollar gliders were very popular.

The Nats is a fine place to renew old friendships. Dale Kirn, left, and Orville Stuart waits to time Robert Placier's Starduster 900. Model Stu Richmond were on the '53 Air Force Team, and hadn't seen each used a Como .40, finished sixth in C Gas. other since. They're sharing a Cox engine; Dale works for Cox.

NOVEMBER 1986 25 R A M B L IN ’ THROUGH EUROPE With. Richmond By STU RICHMOND. . .We've just about used up our 15-day visa in Czechoslovakia, not to mention our cash and barter items! Saying goodbye to friends is always tough, and this is no exception. Read on, dear reader. ..

• Last month we took you through the Bohumir gave Lynn an artistic scarf with MVVS engine manufacturing operation in scenes from his home. He gave me two Brno, Czechoslovakia. Visit arrangements 1/72nd scale MB-200 plastic kits. I brought had been made by |an Carcic. Shortly after one to my friend at the local hobby shop in 4 p.m. the same day, Jan took us to the area's Orlando; the other is kept for scale premier engine collector who was an R/C documentation as it would make a nice R/C pattern flyer and who also worked as the pi­ simple twin-engined sport scale project. lot of a large 16-foot wingspan camera­ Bohumir and I got along just fine; we carrying drone that was used for airborne spent the whole day together, but his time study of insect infestation in crops. The was mostly spent as my interpreter, rather three rolls of film I'd brought for the day than the two of us having a "one-on-one" were exposed, so I'll tell you what I saw. conversation. We've since done that, as the The attention-getter in the apartment was day's meeting has led to a continuing pen­ a nine-cylinder radial engine, four-cycle, pal friendship. The day was long and mind- and about twenty inches in diameter. It had boggling for us all. Jan Carcic had planned a streamlined fairing behind it with all sorts and pulled it off w ith the same precision as of instrumentation and looked like a he builds the "30 point" John engine. I'll quarter-or third-size replica of a Ford Tri mo­ never forget standing on the sidewalk, far tor's left or right outboard engine, except it Insignia of SVAZARM, the Czech equivalent from home, and not wanting to say goodbye of our AMA organization. swung a three-bladed prop. A good number to Jan and Bohumir. We made commit­ of 2.5cc (.15) racing engines were on the shopped patiently as we had a truly super ments among ourselves. We were ready to shelf, and since I was an American, I was day. Everyone was tired as we sat in the write them in brotherly blood, but that specifically shown his Ohlsson .60 with the hotel's lounge. We ordered drinks, mostly wasn't necessary. They formed their opin­ round die cast tank mount from 1947. It was beer. Lynn longed for a bit of Jack Daniels ion of Lynn and me; I formed my opinion of kind of beat up, but he owned it with pride. on the rocks, but none was available. We them, and these opinions are non- I wished I could have shown him the like- were deep into beer country, and it was changeable, as friendship among model new O & R .601 had in the car, but time was great! The subject of electric starters was builders crosses all economic levels, all too short. O ur host was one of two five-man brought up as I asked what items Jan and color lines, all religious beliefs, crosses all teams who flew these surveillance models. Bohumir might like from the United States. political systems, and survives with I found it extremely interesting that the I told that I would send each of them a 12- strength! These are my beliefs. Futaba R/C system, or some of the compo­ volt Astro Flight 1/2A electric high speed As I arrived back in the USA some four nents were ejectable from the camera starter...perfect for the tiny diesel engines weeks after this full day, I had nice letters drone in case of trouble. they build and fly. Later I learned Bohumir waiting from Jan Carcic, Bohumir Krajca, O ur host's pattern model was quite con­ does not have a car, and I now think Jan's and Josef Sladky. From Bohumir I share ventional; rear exhaust-piped engine with Skoda had a six-volt battery like the early with you a paragraph that says: above-average workmanship, as I recall. Volkswagens, rather than 12 volts. The "It was really a pity that you could not stay The visit was brief, unexpected, and fun. starters are there as this is written and some­ longer here. I was looking forward to dis­ We left to meet the women who window- how I'm sure they're in use successfully. cussing with you many topics attached to modeling, etc., but time was too short. But I highly esteem the fact that only a few hours spent together were enough to estab­ lish a true, beautiful friendship among us. No wonder that it was hard to both you and me to give farewell, realizing that the possi­ bility of personal meeting in the future is practically next to none. But such is life. I only hope that your visit to Czechoslovakia has given you all you expected from it." Josef Sladky from MVVS had his letter translated and then sent to me. It said: "Many thanks for your photos and infor­ mation about the CAM-AXIAL engine. I really was pleasantly surprised. I have not yet digested the engine fully, but the design is rather interesting. You definitely have caused me a great pleasure. I am about to spend three weeks of my holiday in Yugos­ lavia. When I return, we w ill have a careful look at this interesting engine and maybe Stu and Lynn with some of the loot they brought in to trade with modeling friends. All was well we w ill give it a try. Many thanks again and appreciated and value well given for value received. kindest regards from me and from all the

26 MODEL BUILDER A watercolor given to Stu by 9-year-old Kamil Jindrich, depicting Czechoslovakia s famous L-39 aircraft in various color schemes and attitudes. A cherished momento from the trip. An East German publication, the equivalent to Charles Hampson Grant's "Model Airplane De­ model magazine called FLUC U N D weight limit which is 5-1/2 pounds—and sign and Theory of Flight'" MODELL TECHNIK. Over beer in his that allows bigger cobalt motors and up to MVVS team, who were pleased by your hometown of Gottwaldov where he teaches 22 cells)." photos." at the university he told Arne and me of 05- Along with Zdenek's letter came a 1:1 set A paragraph from Jan's letter reads: powered R/C pylon racers using inexpen­ of plans for a model called RACE CAT. . . "I still feel much sorry for your having not sive ferrite motors like Astro's 05 or 30-inch span, about 200 square inches, and been able to stay longer here with us; I Mabuchi's 540 sucking off of 7 Sanyo cells. 33 ounces with 2 servos and an electronic wanted to show you much more things They're reaching near 80 mph. The follow­ speed controller. . . it looks sleek as can be! which I believe you would be interested in." ing is taken from one of Zdenek's let­ Airfoil is only 6% thick and prop is shown We were about at the end of our 15-day ters. . .I thought you’d find it interesting at a 6-inch diameter, or about where I run stay in Czechoslovakia. I started to think out due to quietness, speed, and streamlined my’A midget props. No wheels. . . hand lo u d . . ."How can I bring these people to model building: launch, and slide it in. the United States... how can I get them to "This small devil is able to reach about 80 Now this is something the USA hasn't see our Nationals...what if I could get them mph even with cheap ferrite motors. That seen much of yet.. .05 electric R/C pylon to the IMS show in Pasadena, or to Toledo." means that the FAI course (10 laps of 400 racing. I have worries about the 33-ounce One nice thing about model builders is that meters) is flown in less than 150 seconds. weight with seven 1.2ah cells. . .and I'm we always seem to dream ahead of things With more expensive cobalt motors; e.g., known to build light. My Astro Cobalt 05 we'd like to do in the future. Keller 25/sp, Geist 30/6, or Astro 05 Cobalt, C ontinued on page 90 Oh... I almost forgot! When I got back flying time could be less than 120 seconds. home there was mail from Doctor Zdenek I think it is amazing for such a small racer. Janacek (yes, he has his doctorate) who is so This category seems to be replacement for interested in electric-powered R/C models the official FAI electric pylon racing which along with a neat plan from a German is more expensive (there is 2.5 kilogram

MT-Bauplan 802 RACE CAT Elektroflugmodell der Schnuppi-Klatse

Konstruktion: Werner Oettweiler Technitche Daten: Spannweite: 800 mm Lange: 660 mm Gesamtflache: 14.4 dm· Fluggewicht: ca. 950 g Gesamtflachen- bclastung: 66 g/dm · RC-Funktionen: Ouerruder. Hobenruder. Motorschaiter

BauplanmaBstab: 1:1

Verlag fur Techmk und Handwork GmbH Postfach 11 28 7570 Baden-Baden

Three-view of a 05-powered R/C pylon racer Jan Garcic gave Stu two of these 1/7 2 scale M B -200 plastic kits, one of which he'll use as scale popular in Czechoslovakia. Speeds reach up documentation for a future R/C sport scale project. to 80 mph!

NOVEMBER 1986 27 BYRON’S FAN-FLY By MARK FRANKEL. . .Byron's annual soiree for the jet set once again brought out the best in ducted tan flying craft. The weekend was filled with notable jet aircraft, many of which are pictured in this article.

• Although he couldn't have known it at Tom Sewell's two examples of the "J" are graceful. Furthermore, at a scale of 40% full the time, Jim Bede was providing the theme built around wings that look like they were size, the model is large enough to carry a for the annual ducted fan rally at Ida Grove, borrowed from a Kaos. Watching these great amount of detail. Iowa, when he mounted a small turbojet in models perform reinforces the Kaos illu­ One functional detail that really im­ one of his BD-5 airframes. No fewer than six sion. They leave the ground quickly, they pressed me was the use of a "clamshell" BD-5J's appeared at the Fan-Fly, ranging in are highly aerobatic, yet very docile. At the thrust reverser that actually stops the model size from Tom Sewell's small stand-off scale other end of the spectrum, Kerry Sterner's during its landing roll. The Byron BD-5J kit Dynamax-powered models to a full-sized, 17-pound model is very majestic and stable. is scheduled for release shortly, and I sus­ man-carrying example built and flown by It seems to land at a moderate jogging pect that it will become one of their most Dave Hoover of Sussex County, New Jersey. speed and its top speed is about 560 miles popular models. In addition, the Byron factory displayed two per hour. The Byron BD-5J falls between Several impressive scratchbuilt scale prototypes of the forthcoming kit in 40% Sewell's and Sterner's models in size. This models were flown during the weekend. scale, and Kerry Sterner tru c k ^ in his huge design appears to be the best of both Ivan Munninghoff and his son Paul of 1/2-scale replica of the "J" used in the James worlds. It has convincing speed and aero­ Colorado Springs, Colorado, arrived with Bond movie Octopussy." batic ability, yet it is large enough to be their F-16XL. The "XL" is a delta-winged vari-

Scott Forster's highly detailed F-16A from the Byron kit. This model Col. Bob Thacker and his SAAB Viggen. This model is powered by a features functioning gear doors, full cockpit detail, and a boarding Byrofan/Rossi .81 propulsion unit. It represents a 10.5 % scale model, ladder for static display. and flies at 13 pounds.

2 8 MODEL BUILDER Bob Violett with some of the Sportshark models he markets. There A lineup of Byron F-16 models that were flown over the weekend. were a good number of Violett 'sharks in the air all weekend.

Ivan Munninghoff's latest design, an F-102A delta fighter patterned after the Convair aircraft. Model featured functional speed brakes, completely detailed cockpit with opening canopy. Mike Kulczyk's Gloster Meteor, an extremely fast twin-engined jet

Ivan Munninghoff's F-16XL that began as a Byron F-16A kit. The XL John Carlson's M iG 21. The model is 1/7 scale, derived from a 1/32 has more wing area, assuming a different personality from its delta­ Revelle plastic kit. The MiG wasn't ready to fly at the Byron Fan winged counterpart weekend, but should prove to be an excellent performer in the air. ant of the F-16 Fighting Falcon. General Dy­ Another delta was brought by John Carl­ model powered by a Byrofan/Rossi .81 and namics has built two prototypes which are son of Richfield, Minnesota, a 1/7 scale it performs magnificently. The canard al­ currently undergoing flight test at Edwards model of the MiG-21. Unlike the Munnin- lows the nose to rotate early in the takeoff Air Force Base. Ivan developed his delta ghoff deltas, the MiG-21 has a horizontal run, and the model breaks ground in a sur­ from a Byron F-16 kit. With its huge wing the tail. John's model was scaled from a Revelle prisingly short distance. Bob flies the Vig­ "XL" assumes a totally new flight 1/32 scale plastic kit and it is powered by a gen smoothly and displays its rapid roll rate personality. Dynamax/O.S. 77 propulsion package. Like in a very prototypical fashion. Ivan and Paul also displayed another the Munninghoffs, John hopes to fly his Another impressive scratch subject was delta model that they are developing, the F- MiG in the near future. flown by Mike Kulczyk of Austin, Texas, a 102. This is an early supersonic delta of the Yet another delta scratchbuilt subject Gloster Meteor. This is a twin-engined Brit­ 1950s which they have modeled at 1/8.5 which was displayed and flown at the Fan- ish jet of the late 1940s. The Meteor always scale. W hile the F-102 was not quite ready Fly was Bob Thacker's Saab Viggen. This is seemed to be a daring model subject due to for flight during the Fan-Fly, it was expected a delta-winged fighter with a canard, a the outward placement of the engine nacel­ to fly by early July. It looks like this model horizontal stabilizing surface mounted for­ les. The loss of either engine in flight should w ill have excellent flight characteristics. ward of the wing. Bob's Viggen is a large produce horrible yaw problems. But this

NOVEMBER 1986 29 A closeup look at Scott Forster's exquisite F-16A.This is such a real­ A huge 1/2-scale BD-5J, designed and built by Jim Werst and Kerry istic model, it should be in the movies! Sterner. The model is powered by a Byrofan/Rossi combo.

A Bob Violett Sportshark used by the Cloud Dancers display team. Scott Forster's Sportshark. quite a popular model! characteristic doesn't seem to deter Mike camera. models are superb non-scale aircraft that who made sure that his engines ran reliably W hile the scratchbuilt projects are in­ were designed for maximum performance. and in unison. The Meteor is a small model teresting, the majority of jets at the Fan-Fly Either airplane flies well enough to be com­ but it doesn't lack performance. Mike made were derived from kits. Bob Violett's Sport­ petitive in pattern events, yet they are easy several high-speed passes down the runway shark and Tom Cook's Starfire were repre­ to build and noncritical to fly. Both models that were difficult to track w ith my video sented by numerous examples. These offer an excellent introduction to jet flight.

John Carlson's MiG 21, a 1/7 scale from a1/32 scale Revellekit. The MiG wasn't ready for flight, Ivan and Paul Munninghoff's F-16XL, derived but should prove to be an excellent performer in the air. from a Byron k it of the F-.16. V e ry impressive.

30 MODEL BUILDER Dennis Crook's Starfire, from the Jet Model Products kit. A sleek and A closer look at Col. Thacker's Viggen. Flying recently in California, efficient flyer. it suffered some damage in a crash, but is repairable.

One of the factory P-16's rounding onto final approach at the Byron Harry Wood's F-16 displays its smoke system during an aerobatic International airport routine put on during the weekend festivities. The most prevalent model at the event was the Byron F-16.1 once remarked that the Byron F-16 was becoming the J-3 Cub of the jet field, and the F-16 attendance at this event certainly confirmed that statement. The F-16 kit has been in the field for more than six years now, and it is interesting to see its evolution. Some modelers, such as Scott Forster of Vermont, have built exam­ ples with intricate scale detail. Scott's cur­ rent F-16 sports an opening canopy, full cockpit detail, complete rivet detail and panel lines, functioning drop tanks, highly detailed markings, wheel well doors and a boarding ladder used for static display. On the other hand, some modelers, such as Harry Wood of Long Beach, California, Ivan Munninghoff's distinctive F-16XL in flight overhead. The delta configuration makes this jet have undertaken the development of addi­ easily identifiable in the air. Substantially more wing area gives it a different flight personality. tional flight options. Harry's F-16, which is said to weigh nearly 16 lbs., has a smoke system which provides Thunderbird-type exhaust smoke on command. It was truly impressive to see Harry's F-16 streak over­ head with a plume of thick white smoke which was turned on and off during aero­ batic maneuvers. One of the most interesting sights of the weekend was a glimpse of the new "mega- project" that the Byron group hopes to fly in August. It is a perfectly scaled 450-pound model of a B-29 powered by four gasoline engines swinging four-bladed props. W hile

Look out. . .expected to be flying in August, the Byron Factory's B-29 will weigh around 45L Continued on page 72 pounds when completed, with power by four gas engines swinging four-bladed props. Yoww!!

NOVEMBER 1986 31 • By their evident faith in the rotary-valve "model size" advantages by commandeer­ engine, both these well-known Austrian ing the highly effective ABC metallurgy manufacturers of model engines—HP and (more normally used for the model engine Webra—make similar and interesting com­ piston/liner) for use in the rotary valve itself. ment on the relationship between four- With piston/liner also using the ABC stroke valving systems and the "conditions method, it can be seen that the complete of use" of the normal model engine. How­ use of nonferrous and high-conductivity ever, it is equally noteworthy that their view materials, all having very similar thermal The T4-80 is reliable, with a minimum of prob­ lems for the purchaser; it's durable, and easy to differs from that of the main thrust of expansion properties, is this manufacturer's operate as well. A distinct value for the money. Japanese model engine design which has route to successful application of the placed total reliance on the much more "Cross" rotary valve layout in the model chromed brass insert which doubles as part widely developed poppet valve. engine. combustion chamber and part valve sealing In the full-size field, the considerable at­ MECHANICAL DETAILS area at the most critical point. Combustion tractions of the rotary valve (potentially very The crankcase is a one-piece cylin- shape is "wedge-style with the plug set over low friction and unrestricted rpm levels) der/crankshaft housing finely die-cast in at the side opposite squish area. have not proven sufficient to overcome the aluminium alloy. The cover for the rotary The rotary valve is also brass, but is, how­ difficulties of valve sealing and consequent valve's rubber belt drive is also integral with ever, chromed externally along the length compression loss. The model engine, on this casting. of its bearing surface. Inlet entry and exit is the other hand, offers a far more favorable The cylinder-head is similarly cast in alu­ via milled slots in the periphery of the environment for the rotary valve: scale ef­ minum alloy. Its most dominant feature is valve, w hile the exhaust leaves the combus­ fects lessen thermal distortions, w hile the the rotary valve housing running horizon­ tion chamber via a similar milled slot and fi­ usual model engine fuel/oil mixture con­ tally through the head and 1/4 inch above nally exits to the atmosphere axially siderably reduces wear problems and at the combustion chamber height. It seems prob­ through the valve end. The other end of the same time enhances the compression seal able that, thermally speaking, the rotary tubular valve is sealed by a steel plug which at the rotary valve/cylinder head interface. valve could run direct w ithin the alloy head also secures the belt-driven, half-speed alu­ Putting their beliefs firm ly into practice, material, but for reasons of longevity and a minum pinion and which, itself, ensures Webra's T4 four-strokes (in 6.5,10.0, and 13.3 more precise matching of expansion prop­ correct valve end float. Location of this pin­ cc. sizes), uniquely supplement these erties, Webra has opted to use an un­ ion onto the valve is by a very small dowel pin, and is a vivid indication of the very low friction expected and obtained from this ro­ tary valve. The crankshaft is of hardened steel and finish ground. The crankweb is heavily counterweighed by much material removal from the crankpin side. The crankshaft pin­ ion, which provides the initial belt drive to the overhead rotary valve, is, in fact, milled in one piece w ithin the shaft material, and

The angled exhaust stub allows many different m uffler outlet positions.

3 2 MODEL BUILDER though complicated in manufacturing terms, simplifies subsequent engine assem­ bly and keeps the half-speed pinion down to manageable size. The piston/liner uses the ABC method, but to ease production and enhance engine life, the high-silicon piston is fitted with a cast iron Dykes piston ring set at crown height. The gudgeon pin isfree-floatingand is fitted with brass end pads. The free fit is necessary so that engine disassembly can proceed by prior withdrawal of the pin through the hole in the rear of the crank­ case. Both ring and piston are turn-finished, and the piston is internally milled to reduce weight. The liner is a simple brass tube, in­ ternally chromed and honed, and has a thick flange at the upper end. No location pins are provided, so, before any removal, the liner should be marked to ensure cor­ rect realignment of running surfaces. The connecting-rod is an aluminum alloy die-casting with phosphor bronze bushings at each end, each drilled with two lubrica­ tion holes. Webra's conventional twin-needle (TN) carburetor at 6-1/2 mm bore size is used here, and is eminently suited to the low/me- dium rpm levels like with this engine when Webra's rotary valve four-stroke represents the simplest possible layout and fewest parts. used in R/C scale applications. Beyond 11,000 rpm, this carburetor size ally lit (though apparently for quite different POWER TEST becomes an increasing restriction to reasons). At the low rpm end, the plug was Open Exhaust/5% nitromethane/10% depress hp levels below that which could being given too much time to "cool off" be­ Castor oil with 5% ML70 synthetic be realized by allowing the rotary valve its tween power strokes, whilst at the high rpm oil/Webra No. 3 plug. head in rpm terms. end, it was clear that the plug was not pro­ The low speed pulling power of the T4/80 OTHER ENGINE POINTS viding sufficient ignition advance for those (as foreshadowed by that 24 x 8 Zinger per­ A large squish clearance of .062 inches is speeds. Between 5,000 and 11,000 rpm plug formance) became evident during monitor­ used in conjunction with a significantly performance was very steady. ing of Torque figures, in particular, the band low compression ratio of 6.8/1. This is a little surprising for a methanol engine and maybe is an indication of the occasional uneasy relationship existing between the four-stroke cycle and the glow plug. The im­ portance of the combustion chamber de­ sign is recognized and continues to be the subject of much experiment in the model four-stroke. In this area, the rotary valve lay­ out presents some problems but equally some advantages over the normal poppet- valve layout; i.e., it offers an unobstructed valve throughway area which can be made very large, and avoids the problem of pop­ pet valve to piston clearance if extreme tim­ ings and/or high-compression ratios are used. However, the rather rigid geometric rotary valve alignment tends to restrict that flexibility of port positioning characteristic of the poppet valve. Actual valve timings on the T4/80 are nothing extreme. At present, an inlet period of 260 degrees and exhaust of 248 degrees with an overlap of 38 degrees are quite usual for the expected speed range. RPM CHECKS A wide range of Graupner nylon propel­ lers were used during this test. These are highly suitable for today's model four- stroke engines because their rigidity and mass perform a useful flywheel function to control the severe impulses from the single­ cylinder four-stroke, and their consistency and quality are becoming legendary. The rpm ranged from 12,050 down to an unexpected 3,043 on a 24 x 8 Zinger. At both these extremes, performance was more certain if the glow plug was continu­

NOVEMBER 1986 33 Webra T4/80 Four-stroke.

Dimensions & Weights: Capacity—.813 cu. in. (13.32 cc.) Bore—1.004 in. (25.5 mm.) Stroke—1.027 in. (26.08 mm.) Stroke/Bore ratio—1.023Λ Timing periods—Inlet—opens 12° BTDC —Inlet—closes 68° ABDC —Total period 260° —Exhaust—opens 42° B8DC —Exhaust—closes 26° ATDC —Total period 248° Combustion volume—2.3 cc. Compression ratio (Geometric)—6.79/1 Squish clearance—.062 in. (1.57 mm.) Squish area—.13 sq. in. Squish angle—0° Crankshaft dia.—.4722 in. (12 mm. nominal) t Crankpin dia.—.2751 in. (7 mm.) Gudgeon pin dia.—.2362 in. (6 mm.) Connecting rod centres—41 mm. Crank nose thread—.3064 in. x 20 TPI (8 mm. x 1.25 mm.) Carburetor bore—6.5 mm. The T4's combustion chamber is wedge-head, squishing towards the glow plug. Note the circu­ Height—4.52 in. (115 mm.) lar brass insert at the center of the cham ber-this insures similar thermal expansions against the W idth—2.36 in. (60 mm.) brass(chromed) rotary valve shown alongside chamber. Length—3.38 in. (86 mm.) between 4,000 and 8,500 rpm. A peak Mounting holes—52 mm. x 25 mm. x 4 torque of 107 oz. in. at 6,400 rpm was mm. holes. W idth between bearers—43 mm. reached together with a final maximum Frontal area—7.66 sq. in. (49.4 sq. cm.) bhpof .93 at 10,700 rpm. This figure is lower Crankshaft weight—3.55 oz. (100.6 gm.) than the manufacturer's claim of 1.15 ps. Piston weight—.45 oz. (12.75 gm.) (1.134 hp), but in the absence of information Overall weight (with silencer)—21.5 oz. as to fuel used and rpm point, the compari­ (609.5 gm.) son is less than meaningful. Fuel consumption figures were recorded Performance: at the various rpm points (approximately Max. BHP—.93 @ 10,700 rpm (Open Ex­ 600 rpm steps), and showed that maximum haust & 5% Nitro.) efficiency occurred near to maximum bhp Max. Torque—107 o. ins. @ 6,400 rpm point. The figure of 860 Specific Fuel Con­ (Open Exhaust & 5% Nitro.) sumption units (SFC) is a quite respectable Rpm on Standard figure for a methanol engine in "standard" p ro p cllrfv Open Ex. Silencer trim, and not being pushed hard in that par­ 24 x 8 Zinger 3,043 2,990 ticular direction. The fuel consumption it­ 18 x 7 Mastro (OPS) 4,540 4.453 self showed the usual variation with power 18 x 6 Graupner 5,255 4,957 15 x 8 Graupner 6,830 6,620 increase and ranged from 10 to 15 cc./min- 16 x 6 Airflow 6,910 6,695 utes pro rata, a quite economic figure com­ 12 .5 x 7 Graupner (3 pared with other engines tested so far by blade) 7,920 7,715 11 x 7 Graupner (3 Brass nipple under main bearing is the usual blade) 9,860 9,500 Continued on page 72 four-stroke breather and oil drain. 10 x 8.3 Graupner (3 blade) 10440 10,250 12 x 6 Graupner 10,600 10 40 0 10.5 x 6 Graupner 12,050 11,900

Performance Equivalents: BHP/cu. in.—1.144 BHP/cc.—.07 Oz. in./cu. in.—131.6 Oz. in./cc.—8.03 Gm. metre/cc.—5.63 BHP/lb.—.69 BHP/Kilo.—1.52 BHP/sq. in. frontal area—.12

Manufacturer: Webra Modellmotoren Gmbh & Co. Eichengasse 572 A-2551 Enzesfeld Osterreich. Simple crankshaft pinion is built as part of crank, so no assembly problems here! Gudgeon pin has brass end pads. Piston turned from solid aluminum alloy.

34 MODEL BUILDER M itchell

B-10

NOVEMBER 1986 3-VIEW COURTESY MODELAR MAGAZINE 35 The MK-12B's needlevalve has a soon-to-be pat­ ented hook on its end to catch pieces of dirt ΜΚ-12β from the fuel.

VITAL STATISTICS: 2-3/4 inches long to the drive washer, 1-1/2 inches across the mounting lugs, 2-3/8 inches to top of cooling fins. Weight is quoted at 153 grams, plus or minus 5 grams (about 5- 1/2 ounces). Bore is 15.5mm; stroke is 13mm; displacement is 2.46cc (it's a .15) made in the Soviet Union. UNIQUE CHARACTERISTIC(S): En­ gine, when vigorously shaken, rattles in­ ternally. Engine is a P-O-S.

The Russian alphabet is all screwed up; some of their letters are upside down, some of their letters are backwards, some look both upside down AND backwards! But then they must think OUR alphabet is all screwed-up too. Except for this month's en­ gine, we’re probably even; we just haven't recently mass produced anything as bad as this month's engine. The Russian letter "B" is equivalent to our Packaging for the MK includes a 16-page instruction booklet with certificate of manufacture. letter "V," so this month's engine is really a Here Stu's friend Dwayne's engine number 02 sits with Stu's engine. Cost is about $12.00. Russian MK-12V. . .as in v ic to ry .. .but I'll real eye-openers like their mini-priced MK story using a slightly earlier version of this stick with the "B" as in BAD, as this engine made for the masses and the latest version engine, but it broke its crankshaft w hile be­ really is. It's one of the worst of modern of the maxi-value, in-line Krasnorutkij .60 ing gently broken in (I'd not even gotten a Soviet production. It even took an Ameri­ jewel. Both of these engines are highly suc­ picture of it running), and I gave up in dis­ can Sullivan starter and good o l' Yankee in­ cessful and they parallel model engines gust. By the time I got a replacement en­ genuity to get it to run! Read on for details. likewise made in China, like the Silver gine, I'd lost interest in having a second en­ There truly is some great model engine Swallow for the masses and the world-class gine possibly break in my face while designing and manufacturing taking place 2.5cc "CS" made for FAI free flight running. The replacement came with red in the Soviet Union today. If you stay with competition. this column long enough you'll see some About a year ago, I started op this month's Continued on page 85

Here's a closer view of the engine's needlevalve with its hook at the end. Stu awarded this engine a 1 in manufacturing excellence. Not A fter a lot of hocus-pocus, a squeeze here, a caress there, and a few too excellent! unprintable phrases, and it runs! No mean feat!

36 MODEL BUILDER • The 20th Annual SAM Championships were a resounding success according to George Armstead, Contest Manager, who stated better than 180 contestants registered for this four star meet. As can be seen in Photo No. 1, we have caught George in the act with his stem out­ look. The headquarters tent shown was lo­ cated halfway between the free flight and p m SPARKS I ' By JOHN POND radio control competition centers. We snapped Joe Beshar playing hookey from his job as R/C Contest Director. Joe has been plugging .020 F/F Electric without too much success, so he felt he had to get out and show the boys what they are missing. Photo No. 2 shows Joe recovering his model barely in front of the trees. Didn't re­ member the name of his helper (he has been around for quite some time) but he couldn't have had better coaching in the electric event than from a former winner. Joe was fortunate to have help like Woody Woodman (traffic control in takeoff area), Mike Granieri (fuel allotment and timer), Don Garafalow and the Chief Recorder whose name escapes me, plus Dorothy Granieri who put in many hours on the frequency control board. A great gang who did a great job! This columnist was lucky to get Photo No. 3 of Bill Schmidt, the announced win­ ner of R/C Assist High Point, before he lost his good-flying 1/2A Texaco Sailplane. Bill claims the model just went out of sight right overhead before he could dive it back into sight. Didn't ask, but who puts return ad­ 1. Contest Manager George Armstead shows 2. R/C Contest Director Joe Beshar took time dresses on radio models? good form in how to be authoritive. to fly his .020 electric Playboy Cabin model. W hile snapping shots and swapping lies, Ft. Worth boys were so sold on the Chester Rather than make you, the reader, wait until (as you know, the second liar hasn't got a Lanzo Bomber design after the Old Timer the end of the column for the results, we are chance), Pond ran across Walt Eggert with Events at the Reno AMA Nats, they have putting them right up front. See for yourself his stable of models. Most of these were de­ scaled and built Bombers to every imagina­ what a good meet it was! signed and built as possible Megow gas ble class. This may sound like they are in a FREE FLIGHT kits. Seen in Photo No. 4 in front of Pond is rut but the performance of the model does the Megow Chief being documented for an not appear to diminish when scaled. The 1936 WAKEFIELD RUBBER <16» old timer of 1940. Walt had some interest­ results prove that! 1. Peter Michel (UK) (Copeland) 349 ing stories of his days with Fred Megow and Might also mention the weather was 2. Reg Parham (UK) ('35 Light) 343 Paul Karnov (Quaker man). Several of Walt's pretty fair although two of the days did suf­ 3. R. Thompson (Wriston Diamond) 330 designs like the Chief failed to make pro­ fer from high humidity and stiff winds. Two 4. John Stott (Copeland) 330 (Lanzo Duplex) 306 duction as Walt left Megow's employment minute flights for free flight was truly the 5. R. M oulton at that time. lim it on that field as those trees loomed up NOSTALGIA CAS ,0l-.08(9) One more picture of interest: Photo No. 5 very quickly when retrieving downwind. 1. John Bortnak (Can.) (Y-Bar) 360 shows part of the Fort Worth-Dal las gang on In R/C assist, the boys have done their 2. R. Lipori (Zeek) 360 the runway. Holding the Lanzo Bomber is homework in the Limited Engine Events as 3. Jim Walston (Hewitt Record) 338 that generous and likeable doctor, "Bo" all had flyoffs. The biggest was Class C with 4. D. McLeod (Can.) (Y-Bar) 320 Buice with Joe Percy ready to crank up. The eight flying. I know, I wuz dere, Charlie! 5. J. Barker (Zeek) 261

3. Bill Schmidt, Topeka, Kansas, lost this good-flying 1/2 A Texaco 4. Walt Eggert and John Pond look over the documentation for Walt's R/C Sailplane. Has not returned, as of this date. design, the Megow Chief( in center). PhotorCortright.

NOVEMBER 1986 37 6. West Coaster Loren SchmidtfSAM 51} on 7. Part of the English Invasion, William and 5. The Ft. Worth boys. Bo Buice and Joe Percy the sticks for his Berkeley Buccaneer. Wife Adam Beales w ith Korda and Lam b Climber. take a second for a photo. Busy boys! Miriam checks watch. SAM 35 sparkplug Dave Baker in background.

8. Reg Parham, England, with an excellent-performing Gordon Light 9. Don Knight holding an unusual Wakefield Canadian Winner, a Fred 1935 Wakefield Winner. Photo: Johnson. Rogerson design of 1935. Photo:Johnson.

OHLSSON 19-23 SIDEPORT (6) 1. Tom Lucas (Playboy/Atwood) 444 3. G. Donahue (Zipper A) 340 1. Herb Wahl (O.O.S.) 281 2. Bruno Markiewicz (Sailplane/OR 60) 409 4. Frank Fay (Kerswap) 281 2. Bob Bissett (Miss Valiant) 173 3. Woody Bartlet (Alert/OR 23) 330 5. J. Bocckinfuco (Playboy) 266 3. Elmer Jordan (Coronet) 120 4. Bob Edelstein (Playboy/OR 60) 294 .020 REPLICA CABIN (b) "SLAG" ENGINE (3) 5. Ed Rangus (Zipper/Forster) 250 1. Mike Cook (Bombshell) 288 1. Bob Edelstein (Ranger) 291 CLASS A CABIN CAS (12) 2. Barney Onofri (So Long) 286 2. Hank Ochsner (O.O.S.) 182 1. Bruno Markiewicz (Cabruler/Arden) 360 3. B. Oliver (So Long) 279 3. Jim Walston (Thermal Thumber) 120 2. Bob Edelstein (So Long/Arden) 360 4. Bob Bissett (So Long) 270 IIM MY ALLEN RUBBER (4) 3. Elmer Jordan (Coronet/OR 19) 352 5. Bob Edelstein (So Long) 261 1. M. Moskow (Bluebird) 238 4. Jim Walston (Cabruler/Arden) 343 CLASS C PYLON (13) 2. D. McLeod (Can.) (Bluebird) 170 5. Mitch Post (So Long/Hornet) 321 1. Hans Ochsner (Gas Champ/ 3. J. Bortnak (Can.) (Bluebird) 165 RUBBER CABIN (30) OR 60) 508 4. Bill Bell (Bluebird) 157 1. R. Factor (Korda) 500 2. Mai MacLean (Meteor/OR 60) 399 COMMERCIAL RUBBER (15) 2. J. Phelps (Korda) 469 3. John Bortnak (Can.) (Zipper/OS 35) 360 1. Ed Konefes (Convertible) 360 3. Sal Taibi (Verdier) 443 4. M itch Post (Zipper/Torp 32) 351 2. Dick Sherman (Convertible) 340 4. Stan Colson (Korda) 423 5. G. Donahue (Red Ripper/Brown) 336 3. Stan Colson (Korda) 245 5. J. McCay (Hi-Ho) 355 TOWLINE GLIDER (8) 4. T. Langley (Pacific Ace) 200 .020 REPLICA PYLON (15) 1. Stan Colson (Floater) 360 5. John Stott (Schnozzle) 196 1. G. Martha (Playboy) 348 2. E. Martinson (Thermic 70) 338 LARGE PYLON GAS (6) 2. M. Schindler (Playboy) 343 3. John Bortnak (Can.) (Beaumont) 307

10. Peter Michel, England, did Bob Copeland's design proud, winning 11. The old master, Henry Struck, turned out for the rubber event the Wakefield event at Westover AFB. Photo: Johnson. w ith his 1937 W akefield design. Good-looking diamond fuselage.

38 MODEL BUILDER 12. Ed Konefes,(no, not brother Joe!) with a slick-looking compressed 13. Georgia boy Jim Walston, with hot-flying, Atwood-powered Play air-powered original design. A smooth and quiet flyer! boy Cabin. W ould you believe he didn't place?

14. The Class B version of the Com et Interceptor as produced by Bob 15. Bill Bell from Baltimore holding his Bluebird, a snazzy design for Edelstein. Photo:Johnson. the Jimmy Allen event. Photo: Johnson.

4. Jack Jella (Cosmo) 254 SMALL PYLON CAS (8) 3. Frank Fay (W inged Yankee) 286 5. S. Landy (Thermic 72) 234 1. D. M acLeod (Can.) (Alert) 360 4. W. lohnson (Thermal Thumber) 285 SMALL CABIN CAS (5) 2. lo. Barker (Alert/Homet) 300 5. lim C offin (O.O.S./OS 15) 284 1. Bruno Markiewicz (Cabruler/Arden) 360 2. Jim Walston (Cabruler/Arden) 360 3. Bob Edelstein (So Long/Arden) 332 r r 4. Frank Fay (Spearhead Jr.) 189 5. Elmer Jordan (Coronet/Arden) 186 / 7 5 RUBBER SCALE (14) 1. T. Langley (Taylorcraft) 264 DRAWN BY ALLEN POND 2. Chuck Bokowski (Puss Moth) 249 3. Joe Fiorello (Puss Moth) 195 ‘ T MOUNTING 4. John Stott (Curtiss Robin) 190 15/16*' LAYOUT 5. Ed Novak (Curtiss Robin) 182 CLASS A CAS (13) 1. Clarence 11 -isnd"- Myerscough (Ranger) 476 2. Bob Edelstein (Ranger/Bantam) 458 3. Mitch Post (Thermal Thumber) 454 4. Jim Walston (Stormer/Arden) 353 5. John Bortnak (Can.) (Interceptor) 319 BABY R.O.C. (Mass Launch) 1. S. Ligarski (Cloud Chaser) LMD HAND LAUNCHED GLIDER (24) 1. Dick Sherman (Hervat) 360 2. J. Langelius (Huguelot) 276 3. Joe Fiorello (Hervat) 233 4. B. Oliver (Huguelot) 233 5. Walt Eggert (Huguelot) 230 POWER SCALE (1) 1. Ken Hinton (UK) (DH Tiger Moth)) 120 CLASS B C ABIN CAS (9) 1. lim Walston (Dodger) 360 2. Brune Markiewicz (Dodger/KB 29) 360 3. C. Myerscough (Dodger/Remco) 358 4. Hans Ochsner (DodgerIRemco) 259 5. B. O live r (So Long/OR 23) 236

NOVEMBER 1986 39 17. Old Timers never fade away, they just look that way! Carl Hatrak, 18. Englishman Ken Hinton comes over for the SAM Champs regular­ kneeling, with Bert Pond, Mickey PeAngelis, and John Pond. ly. Won the gas power F/F Scale with DeHavilland Gypsy Moth.

CLASS C C ABIN (12) 1. Mitch Post (Playboy/Cyke) 360 2. C. Myerscough (Playboy/OS 40) 355 3. John Bortnak (Can.) (So Long) 347 4. John Lessig (Super Quaker) 333 5. C. Martha (Dodger/OR 33) 315 COMPRESSED AIR (5) 1. John Stott (McMahon) 327 2. Karl Spielmaker (Drone) 218 3. Ed Konefes (Orign.) 308 4. Tom McCoy (Robin) 43 5. Robt. Pattison (Drone) 39 LARGE CABIN CAS (S) 1. Ed Konefes (Bombshell) 324 2. D. McLeod (Can.) (So Long) 315 3. Bruno Markiewicz (Playboy) 308 4. Tom Lucas (Playboy Cabin) 201 5. T. Lewis (Powerhouse) 41 TWIN PUSHER (Mass Launch) 1. lohn Stott LMD .020 ELECTRIC (3) 16. Dick Sherman with Gordon Light 1935 Wakefield Winner. Believe it or not, this old goat won 1. Joe Beshar (Playboy) 285 the Hand Launched Glider event! Photo: Johnson. 2. Bill Baker 178 3. Fred Koval (Bombshell) 157 4. Steve Boucher (MC/OS 60) 1714 5. Joe Percy (Bomber) 1006 RUBBER STICK (24) 5. Bob Walter (Bomber) 1704 CLASS B IG N IT IO N (18) 1. Bill Baker (Lanzo) 818 CLASS A IGNITION (16) 1. Bill Schmidt (Playboy/McCoy) 1599 2. R. Lipori (Ritz) 645 1. Bill Schmidt (Playboy/Arden) 1260 2. Jim Reynolds (Bomber/Orwick) 1530 3. Stan Colson (Lanzo) 512 2. Eut Tileston (Corsair/Elfin 2.49) 1116 3. Bruce Norman (Bomber/Forster) 1520 4. R. Thompson 510 3. Jim Reynolds (Bomber/Elfin) 1109 5. J. McCay (Stickler) 370 4. Bruce Norman (Bomber) 1078 Continued on page 97 CLASS B PYLON (10) 1. Bruno Markiewicz (Zipper) 655 2. Elmer Jordan (Zipper) 360 3. John Bortnak (Can.) (Diamond) 360 Bebe Contest Special 4. Herb Wahl ((O.O.S./OR 23) 355 5. Mitch Post 352 30 SECOND ANTIQUE (10) 1. John Bortnak (Can.) (Gas Bird) 461 2. C. Myerscough (Gas Bird) 455 3. B. Markiewicz (Gas Bird) 360 4. Herb Wahl (Clipper/OR) 352 5. Elmer Jordan (Clipper) 346 NOSTALGIA (.081-,65) (10) 1. Bob Edelstein (Spacer) 360 2. D. MacLeod (Can.) (Y-Bar) 356 3. John Bortnak (Can.) (Y-Bar) 323 4. S. Landy (All American) 307 5. P. Nelson (Kiwi) 286 RADIO CONTROL ASSIST OLD TIMERS 1/2A TEXACO (38) • Here's a rubber-powered flyer from the flying weight of three ounces. The wing­ 1. jim Reynolds (Interceptor) 1755 July, 1939 issue of Flying Aces. Designed span is 36 inches. Power is 14 strands of 2. Bob Walter (Lanzo Bomber) 1717 by Alan Orthof, the Bebe was described 1/8-inch rubber. W ith a high aspect ratio 3. A rt Peterse (Swoose) 1652 in the prosaic language of the day as "A wing and stab, the Bebe should be a fast, 4. loe Percy (Bom ber) 1520 lulu in any language!" Designed as a steep climber with a quick pullout on 5. R. Langelius safe and sane craft for sane modelers, top, ending with long beautiful glides. TEXACO (36) the Bebe Contest Special averaged Careful, the prototype was said to fly out 1. Tom McCoy (Lanzo Bomber) 2535 flights of better than two minutes, with a of sight on several occasions! · 2. Bruce Norman (8omber/OS 60) 1903 3. Jim Reynolds (Bomber/OS 60) 1828 wing area of 100 square inches, and a

40 MODEL BUILDER

By BILL FORREY

IT'S YOUR TURN a Reynolds number that high, it would have • This month's column is going to have a to fly around 440 mph! strong emphasis on what you guys out there The polars that I have for the NACA 2410 have been sending in over the past few are profile polars, but again, at a Reynolds weeks and in some cases, months. It is my number of 3 m illion exactly. So even for this pleasure to turn over the thoughts and ideas close relative of the NACA 2409, the data I of this column to you; for one reason, it's have is useless. I hope you can forgive me easier for me to simply edit ideas rather for the omission of this data (You're proba­ than originate them, and for another rea­ bly thanking me!), and I'll try harder next son, it w ill pump a little additional fresh air time. into what / hope never becomes a stale Additionally, wind tunnel data like that column. which I found above rarely matches the AIRFOIL OF THE MONTH: NACA 2409 data generated by computer programs such A while back I received a phone call from as the famous Eppler program, especially Paul Carlson at the Great Race 10 w ith his two a guy named Randy Hough. He lives in Bel­ when the wind tunnel data is fifty years old meter Prodigy sailplane. Took the Lee Renaud mont, California (about halfway from San or older! It's kinda like comparing apples Memorial Trophy at the Nats with the best Jose and San Francisco). He asked me for and oranges! combined score in Classes B.C, and D with the some data on the Gottingen 795 airfoil, and If any of you out there have a good source Prodigy. then we got to talking about an airfoil that of data for odd-ball airfoils and old NACA greatly improves their light lift performance he had tried on a Sagitta 600, the NACA sections, please let me know. for this type of flying. We feel that the 1-1/2 2409. This airfoil, said Randy, penetrated SUNRISE HLG meter rule is overly restrictive, and serves very well, appeared to have plenty of cam­ A while back I wrote to a club officer of no constructive purpose. ber (2%), and flew "better" than his stock the Portland Area Soaring Society (PASS) in­ "I have sold many plans, and the kits are Sagitta wing with the Airtronics version of quiring about a hand launch glider which doing well. However, I am limited to pro­ the Eppler 205. The wing loadings of the was showing up in the winner's circle quite ducing my kits on a spare time basis, and I two ships, both of which were polyhedral frequently. It was only ID'd as an original still have some jigs to set up. my goal is to by the way, was between nine and ten design, not a kit. My curiosity was aroused. produce a kit of highest quality, with guar­ ounces per square foot for the stock Sagitta The reply I got back came from the anteed performance." 600, and eight and a half for his NACA 2409 plane's designer and pilot, Craig Robinson, Sunrise specs followed: version. Both ships were two meters in of Portland, Oregon. I quote from his letter: Wingspan: 66.75 in. span. "Dear Bill, I am very pleased with your in­ W ing Area: 443 sq. in. Because I haven't featured an "Airfoil of terest in the PASS club, and would like to Flying Weight: 11-13 oz. the Month" for the last two issues, I thought thank you for inquiring about my Sunrise Airfoil: E-387 it would be best to lead off with one this R/C HLG design. Kit Price: $34.00 time. If you decide to try this section on a "The Sunrise was designed three years 'Thank you very much for your time and glider, please let me know, and that goes for ago and has placed in every contest entered interest. Please call or write if you have any other sections that you've seen printed here with three first places, one second, and two questions. Sincerely, Craig W. Robinson, previously. third places. This airplane was designed be­ 2105 S.E. 85th Avenue, Portland, Oregon The profile polars that I have for the fore the 1-1/2 meter rule and is over the 97216, (503)777-5250." NACA 2409 are not truly profile polars at wingspan limit for AMA (Class A) Craig's letter brings up a sentiment that I all, rather the total lift, drag, and L/D polars competition. hear quite often regarding Class A wing­ for a wing of aspect ratio 6:1, and those at 'The PASS HLG fliers have found that in­ span limitations, namely, why have any? Reynolds numbers 3,110,000, a far cry from creasing the aspect ratio/wing area of the The argument goes: if bigger airplanes can't where we fly! Fora nine-inch chord to reach many good kits and designs available be thrown as high as the little ones (and

Bob Taylor built this Randy Wrisley designed Whisper and claims that Sunrise HLG designed, built, and kitted on a limited basis by Craig it is all as advertised, a real floater. Robinson of Portland, Oregon. Winner in Class D HLG.

42 MODEL BUILDER they generally can't), then they have a built- in handicap which evens things out against their better L/Ds and sink rates. Also, the bigger the ship, the wider the minimum di­ ameter thermal turn, which works against the bigger ships because of the often tightly cored low-level thermals, this further offsets some of the L/D-sink rate advantage. I tend to agree with Craig and the PASS club, and I know of at least one other club in my area which feels the same way. How­ ever, I'm not in favor of changing the classifi­ cation for one reason, I think that the span limitation forces you to improve your build­ ing, designing, and flying skills to be com­ petitive. I find that challenging. Besides, there is nothing in the rule book which for­ bids you to have a hand launch contest for Class B, C, or D sailplanes, is there? As I see it, the Class A airplane (under 1.5 meters projected span), even though it is called "Hand Launch Sailplane” in the rule book, is only a definition of a limited span glider, that's all, just like two-meter, 100-inch, or unlimited span classes. Anyone for a Class Paul Carlson again, this time with 100-inch Prodigy. Off the Ground Models may kit this plane D hand launch contest? I think I'd build a as an U nlim ited or Standard Class ship at builder's option. really lightweight, 90-inch Mirage! give the manufacturer a chance, after all, If you have any opinions on this subject, I they can't make money if their customers welcome them, and promise to air them hate their products. Chances are they w ill here in "R/C Soaring." want to stay in business! Thanks for being so A PROBLEM WITH SHRINKAGE persistent with your quest for an answer, Over the years, I've been communicating Phil. We all learned a lesson. with a modeler, gunsmith, antique model WRISLEY WHISPER, WATTA W ONDER! motor and firearms collector, mechanic, "Way back in August 1984 issue of this and jazz musician (whew, that's a lot of magazine there was a construction article knowledge), by the name of Philip (Phil) on a glider that at first I thought was a Mahony of Lime Rock, Connecticut. The towline F/F model, and second, thought subjects are far ranging (as you might would never be able to turn if it was R/C. guess), but his original purpose in writing Well, in talking to its designer, accom­ was to challenge me to an article on cover­ plished model builder, Randy Wrisley, I in­ ing models with a covering material that he advertently offended him by suggesting that saw I had used in a product review of an it couldn't handle much with that kind of di­ Old Timer called the Lehmberg Feather hedral in just the tip panels (which were Merchant. Well, that article may yet be w rit­ tiny!). He asked me if I was the betting kind, ten, but Phil's problem was solved early this and if I would be interested in putting my year at the WRAMs Show. Evidently, a cer­ money where my mouth was. I backed tain trio of colors of this brand of covering down. He invited me to fly the model at were turning up with very little ability to dawn the next day. I accepted. shrink. The other colors were shrinking just To make a long story short, it did indeed fine, so the manufacturer traded Phil out of fly as advertised: slowly and majestically, his three colors and gave him three different and it did turn rather well, if a lot flatter than Team Captain and pilot of the winning Great ones. I had noticed that this material didn't any other plane I'd ever flown before! But it shrink as much as I would have liked it to in Race team Larry Jolly with the LJMP Comet. these same three colors, but I managed to massage out nearly all of the wrinkles by stretching it taut as I sealed the edges, be­ fore shrinking it. I didn't mind the few wrin­ kles there were in the compound curves anyway. Since this one model, I have covered two more using this material and encountered absolutely no problems at all, and one of the colors I used was the one I'd had trouble with before. The point to all of this is that if you encounter a problem with a product (any product) that in your opinion is defec­ tive, return it to the manufacturer. Nine times out of ten they'll fix you up with an­ other product (any product) that in your opinion is defective, return it to the manu­ facturer. Nine times out often they'll fix you up with another product (or replacement) that is going to work for you. At the very worst, they'll return your product to you with a suggestion or two on how to fix what you bought. Don't do what a lot of guys do; The Sunrise, covered and RTF. High aspect ratio wing is very attractive and efficient.

NOVEMBER 1986 43 Super Pieceadis held by Keith Shaw. E-387 airfoil, 20:1 aspect ratio, 15 oz/ft., with Ken Bates on the sticks, finished 76 km course in '83 Steve Grochowski and the Slope Master. Larry Fogel says it can really to win. perform. See text for details. did fly well. I was making flights of three (/ do, / do!) It's a Whisper out of Model covered. The wing and stabilizer are cov­ minutes from about 100 feet at 7:30 a.m. Builder plans in the August 1984 issue. It ered in yellow Micafilm. The all up weight with no apparent lift. I was amazed! takes me a while to get around to some pro­ is 10 ounces. I tried everything to keep the Well, Bob Taylor, of Fullerton, California, jects. Actually, I didn't order the plans (For weight to eight ounces, which it is sup­ was amazed enough by the article that he shame!), but scaled up the drawings in the posed to weigh. I don't know how they did built one for himself. He sent me the photos magazine. I deviated in construction meth­ it. The radio is a Futaba 4L with micro (S-33) to prove it. (I guess everybody thinks they ods (/ promise not to tell!), but the dimen­ servos and 100 mah battery. need to prove something about the Whis­ sions and shapes are all true to the plan. "It flies fantastic. The VERY lightest lift it per!) I quote from his letter: The fuse is not covered to save weight in the w ill fly in with ease. I have sloped it with al­ "Hello Bill Forrey, do you see the picture? tail, and the fin is 1/16 sheet balsa, also un­ most dead calm conditions; i.e., two or three mile per hour breezes. At the slope where I fly, the other guys rub their eyes and shake their heads when they see me fly my Whisper, and they are all sitting around waiting for the wind to come up. It w ill do loops and inverted flight too! "I agree with the article when it states the Whisper w ill do almost bankless turns with little elevator needed. It's a very stable plane too, as good as any I have built. I can't say enough good things about this plane. I consider it a good candidate for a hand launch model. The next one I build will be strong enough for a (hand) launch. Yours truly, Bob Taylor." FLYING W ING OVER TORREY PINES Former Model Builder "R/C Soaring" columnist, Larry Fogel, dropped me a note two months ago to let me know of a new fly­ ing wing kit on the market. He thinks it's a "fine plane, worthy of the publicity," and from what I can see, I would agree. So with no more from me on the subject, I'll turn over this section of the column to my Stan Watson's Pegasus with modified NACA 4412-R412C. At 184-inch span it's one of the big­ gest; 22:1 AR; dry wing loading 16 oz/ft; no flaps or spoilders. Completed the Great Race 76 predecessor: km course first time out during initial testing. "Although not in print for some time,

Mark Stidham and fellow Rockford Skyhawks pose with Graupner Airtronics Sagitta XC, a team-owned sailplane, with Rockford Sky- Discus scale model. Fast, remarkable L /D , good thermal ship. hawks.

4 4 MODEL BUILDER Larry Fogel is still very active in sailplaning. He reports a new addition to his aerobatic armada. And that doesn't happen un less the sailplane can really perform! "It seems that Steve Grochowski enjoyed his Gryphon (Flying wing from Bob Martin Models), but he wanted it to be faster, more agile, and, of course, less clumsy in his Volkswagen. The answer: cut the wing to 51-inch span, thin the airfoil to 8%, and add two slightly toed-in vertical stabilizers. The resulting Slope Master zips through inside and outside loops, rolls, snap rolls, tail flips, and whatever else your finger commands. It weighs 17 ounces using Futaba S-33 micro servos and a mechanical sliding tray coupler. "I'm usually skeptical of flying wings. No respectable airplane should go around without a proper tail. They're too short- coupled and therefore unstable. But here Ken Bates and his horse with no name. This 169-inch span, modified E-214 with no flaps com­ that's the very key to agility, and, if you pleted the Great Race course in 1985. balance your Slope Master properly, it stays straight and level, hands-off. "You can find out more about the Slope Master in kit form by contacting Steve Grochowski, 4791 Neblina Drive, Carls­ bad, California 92008, (619)434-4492." The photos were sent by Steve himself, and he included a nice-looking business card with a line drawing of the Slope Master printed in raised blue ink with the name "Sun Fair Aircraft Design" on it. Looks like Steve means business! TERRY LUCKENBACK ISF LEVEL V #48 For the uninform ed, LSF stands for League of Silent Flight. The LSF is a non­ profit organization of worldwide renown devoted to the betterment of R/C soaring in general and the self-improvement of its member's flying skills in particular. The LSF has given level numbers of correspondingly more difficult achievement from Level I to Level V. The familiar LSF decal and roman Dale Folkening's Dynasoar: E-193 section; 16 oz. loading; piloted by Jack Hiner. A heavy wind numerals being somewhat omnipresent at ship. soaring contest attests to the popularity of the program. ing. Skill in slope soaring is mandatory, as and fly in six contests (minimum of 20 con­ Well, in a letter dated June 11, Rich Level V is intended to delineate extensive testants) where your total points equal Border, Co-Editor of the Millstone Valley Si­ experience in all facets of R/C model soar­ 12,000 (using the LSF points system) and lent Flyers' newsletter, the Excess Ballast, ing. The earned silver 'V' w ill be displayed you must win three of the six. O f course, writes that we now can recognize Terry immediately above the red 'IV.'" you must finish all of the requirements of Luckenback as the newest Level V'er. To give Under the watchful eyes of two witnesses Levels l-IV before attempting V, but that's you some perspective on the significance of of LSF Level II or higher, not related to the pi­ pretty obvious, right? an LSF Level V award, let me go over the lot, the Level V aspirant must do the follow­ Well, if you are interested in the above prerequisites. ing: complete a thermal flight of two hours; mentioned LSF Soaring Accomplishments "Level V (Advanced): Level V is formu­ complete a slope flight of eight hours (oh, Program, you should contact the LSF at P.O. lated to recognize advanced knowledge, my aching bladder!); complete a goal and skill, and determination in R/C model soar­ return flight out to 10 kilometers and back; Continued on page 70

NOVEMBER 1986 45 Building the Dunlap 1 lcc Tunnel Boat By JERRY DUNLAP. . .Here's the solution to the "what to do with the K&B 11cc outboard" puzzle. This tunnel boat design has a scale-like appearance, and has nearly broken the 11cc oval record time.

• In the spring of 1985, K&B Manufactur­ by an inch. Scale-like appearance is something I've al­ ing released the 11cc outboard for model My latest tunnel designs incorporate ways attempted to incorporate into my tun­ boating use. The immediate problem for things that have proven successful on nel designs. I feel the 11cc tunnel has a very those of us with this "Big Fella" was what model tunnel designs, especially those scale-like appearance. hull to use with the motor. The answer for model tunnels designed by my friend, Rod GETTING STARTED most model boaters who had the 11cc OB Geraghty. C o m p a rt to boats I designed a It w ill be necessary to transfer the plans was to simply bolt it on to their 7.5 tunnels. couple of years ago, the 11cc tunnel features onto the plywood used for framework and This rather simple solution seemed to work sponsons that are narrower and with in­ sheeting. One method to accomplish this for those who had 7.5 tunnel hulls like the creased sponson angle. The tunnel center initial task is to make templates for all the Prather 75 Tunnel. section is much thinner. The engine is parts. This can be done by affixing the plans However, it was my feeling that the 11cc recessed forward in the hull. The cockpit to a heavy paper such as tagboard. Tag- OB deserved a hull of its own. I designed a extends farther forward allowing radio board is fairly stiff yet can be cut with scis­ 38-inch tunnel in 1985 that worked fairly equipment to be moved forward in the hull. sors. A product like 3M Super 77 Spray well. In hopes of keeping the boat from fly­ ing off the water too easily, a narrow tunnel width was used. Well, the narrow tunnel width did seem to keep the boat from blow­ ing over down the straightaways, but the boat occasionally rolled over in corners. My first attempt at designing a 11cc tunnel proved "sorta successful." The boat finished second in our district's 11cc Tunnel Class and was capable of running very close to the record time for 11cc tunnel oval racing. But because of the cornering problems, I felt some design changes were in order. It was an unexpected November snow­ storm that gave me the time to get back to the drawing board. The school district for which I work elected to close down for three days during the storm and the weather didn't allow much outdoor activity that wasn't related to playing in the snow. The new boat was shortened to 36 inches in This 11cc tunnel boat was designed specifically for the K&B 11cc outboard motor. The tunnel length and the tunnel width was increased boat has had considerable success, coming close to the fle e oval record running time.

46 MODEL BUILDER NOVEMBER 1986 FULL-SIZE PLANS AVAILABLE-SEE PAGE 106 47 One way of transferring the plans to the ply­ A flat surface is used for assembling frame­ wood is to use a spray adhesive. The frames work, which is built over the plans. Sponson Cowling frame is added to the framework. Use are cut out and the plans then peeled off. frames and cross frames shown here. of thick instant glues is recommended.

The completed framework. It's important to The sheeting for the tunnel bottom being app­ The sheeting for the sponson bottom attached check framework for warps at this time. lied to the framework. and clamped to the framework.

The radio compartment has lots of room. Use of a super heavy-duty servo like the World The bottom half of the hull is sheeted and ready Front cowling of 1/2-inch balsa shown ready Engines servo is necessary fo r turning the 11cc for sealing before attaching decking to frame. for shaping to final form. K&B outboard motor. Adhesive can be used to stick the plans to the glue to set almost immediately, allow­ be sure of the fit. Begin the sheeting process the tagboard. It is rather difficult to use just ing for very quick framework assembly. Be­ with the application of the tunnel floor to the plans for templates since the paper is fore removing the framework from the the framework. The thicker instant glues thin. building fixture, attach the top sponson will provide sufficient time to align the Another way of transferring the plans is to sheer pieces. sheeting. If you feel confident in your abil­ stick them on the frames and scrape them After removing the framework from the ity to apply the sheeting, you can apply the off after the frames have been cut. It takes a building fixture, place the framework on a glue to the framework, spray the sheeting little time to do this, and you also lose the flat surface and check the hull alignment. with the accelerator, and slap the piece on plans. The bottoms of both sponsons should be the framework. Just be sure you have it right After all the frames have been cut, they level with the flat surface. If the framework the first time. should be checked for fit where they inter­ is twisted, gently apply pressure to the Before applying the sponson bottoms to lock with other frames. Trial assemble the framework to remove the warp. The impor­ the framework, check again for framework entire framework prior to placing it on the tance of a straight framework cannot be alignment. The sponson bottoms are glued building fixture. It is very important to do overly stressed. Continue checking hull on next and then the sponson side pieces. the final framework assembly using a build­ alignment throughout the building process. Bill Hunter of Satellite City, providers of Hot ing fixture. The building fixture is simply a The framework can now be completed by Stuff products, once asked why I was still piece of wood the same width as the inside cutting away the part of Frame 1 that needs using clamps to hold pieces to the frame­ of the tunnel. I use 1-inch plywood for removal. The frame for the motor mount is work when the use of an accelerator makes building fixtures. glued to the cockpit sides and the reinforc­ clamping unnecessary. Well, I like to make Using spray adhesive, stick the tunnel ing pieces for this frame glued to the cock­ sure the sheeting is properly aligned and framework plans to the building fixture. pit sides. In front of Frame 5, glue the pieces you do have a little working time with a Place a sheet of waxpaper over the plans of 1/8-inch plywood to which the bottom product like Special T if you use it without and assemble the framework on the build­ will be glued to form the pickle fork. Clue the accelerator. I've also found that the ac­ ing fixture. Map tacks can be used to hold the 1/4-inch x 1/8-inch spruce stringers used celerator can be used to hasten the curing the longitudinal sponson frames to the on the tunnel bottom, deck, and for the bot­ by spraying after the sheeting has been ap­ building fixture. Score the inside of the tom spon m sheerto the framework. Using plied to the framework. Before gluing the cockpit frame where it bends between a sanding block, level the framework pieces sponson deck and center sections to the frames 2 and 1. After the framework is prop­ to accept the plywood sheeting. Be espe­ framework, paint the inside of the hull with erly aligned on the building fixture, begin cially careful when sanding on the sponson clear epoxy. The sponson sheeting and gluing the framework pieces. The new frames to keep the bottoms of these frames center section sheeting are then applied to thicker instant glues like Hot Stuff Special T flat. complete the sheeting to the hull. For those are excellent for framework assembly be­ SHEETING THE 11cc TUNNEL interested in saving some weight, it would cause they w ill fill gaps in the framework. Before gluing any sheeting to the frame­ be possible to use 1/32 plywood for sheet­ Using an accelerator like Kick-lt w ill cause work, it is a good idea to trial fit the piece to ing all parts except the sponson bottoms.

48 MODEL BUILDER The rear sponson frames are attached to the rear cowl using 4-40 bolts and blind nuts. The top to the rear cowl is then glued in place. Sideview of the rear cowling.

Spruce strips are glued to the inside of the tunnel sides. The inside tunnel strips are located 1/4-inch up from the tunnel bottom. The tunnel bottom showing the inside sponson steps and sponson strips.

When trimming and sanding the sheeting INSTALLING THE RADIO EQUIPMENT frame on the inside of the radio compart­ pieces, take care to not round the inside There is lots of room in the 11cc Tunnel for ment that serves as the seat for the hatch lid. and outside tunnel edges. All gaps and installing the radio equipment. A servo tray The plans show where this is located. Be­ seams should be filled with a waterproof- can be made from 1/8-inch plywood for fore attaching the frame inside the radio type filler. I like to use automotive body mounting the rudder and throttle servos. compartment, use it as a pattern for the filler and glazing putty. They work easily The choice of a rudder servo is very impor­ hatch lid. The hatch lid can be made of 1/8 and are very durable. tant. It requires considerable servo power to plywood, but I think plexiglass or lexan pull the K&B 11cc OB through a corner. A looks nicer. Drill holes through both the MAKING THE COWLINGS standard servo just isn't going to get the job frame and hatch lid that will allow 4-40 The front cowling for the 11cc Tunnel is done. On my first boat for the 11cc OB, I bolts and blind nuts to be used to hold the very easy to make since it only requires glu­ hatch lid down on the frame. A minim um of ing a piece of 1/2-inch balsawood over the tried coupling two heavy-duty servos to­ gether. I experienced more problems than it 10 bolts evenly spaced around the lid is cowl frame. Although balsawood is easy to Suggested. work with, it might be a good idea to use was worth. So, I got a super heavy-duty Another important aspect of the radio basswood for the front cowl. Basswood World Engine servo. This is a really large servo with lots of power. The size is no prob­ compartment hatch is a good seal between works fairly easily and it is much stronger the frame and the lid. There are a number of than balsa. The front cowl often seems to be lem because of all the room in the radio compartment. I have found this servo and products that w ill form a seal. The foam the first part of the boat to meet something the IMS super heavy-duty servo to work just tape used for sealing wings to fuselages on like a buoy or the beach. fine for the 11cc Tunnel. A standard servo model airplanes works well. Building the back cowling isn't too diffi­ will work fine for throttle control. The lid itself is important. I mentioned I cult. The cowling itself only has a couple of For through the hull seals, I have had like plexiglas or lexan. The reason, besides pieces. However, how the cowl w ill be held good success w ith G&M Models' seals and looks, is I think it seals better. to the cockpit sides presents some choices. Robart seals for connecting the rudder Assuming your hull doesn't leak, there Some modelers like to use snap fasteners to servo to the rudder linkages. Sullivan Prod­ are only a few places water can get into the hold cowls in place, other like dowels and ucts Flexible Cable-Type Stock #508 works radio compartment. These are through the sliding pin arrangements. Personally, I like well for the throttle linkage. All my tunnel seals and hatch lid. Careful installation of to use a 4-40 bolt and blind nut arrange­ boats are now using solid linkages for steer­ these items should go a long way in helping ment. A piece of 1/8-inch plywood is glued ing. 1/4 x 1/4 spruce stringers work fine, or ensure a dry radio compartment. to the inside of the rear cowling frame and a 1/4 dowel can be used. If one wants to FINISHING THE 11cc TUNNEL hole is drilled through the cockpit side and spend the money, it's possible to use arrow Earlier in the article the need to paint the through this piece of wood. A blind nut is shafts for the linkages. inside of the hull was mentioned. This placed in the wood backing piece and the THE RADIO HATCH LID needs to be reinforced because water will bolt holds the piece down to the cockpit Keeping water from the radio equipment sometimes get into the sponsons. If the in­ side. I bolt both rear cowl frames to the is critical and the radio hatch lid is an area side is not sealed with something the wood cockpit sides and then glue the cowling top where this can occur if it is not built prop­ w ill absorb water. Another method I use to to the cowling frames. In this way, the erly. There are three important parts to seal the interior of a hull is painting with framework is held in place while the top is keeping waterfrom gaining access to the ra­ glued to it. dio compartment. The first is the wooden Con tinued on page 76

NOVEMBER 1986 49 • Without doubt, the famous Tournament of Champions has been the inspiration of a new competition class, now gaining popu­ larity in several European countries. Aero­ batics with large scale-like designs is the name, and the competitors are not only pi­ lots who grew bored with their super fast and often screaming F3A ships, but this class attracts new blood too! In Germany and the Netherlands this new competition class is code-named RC l/X, RC 1 being the former code of what's F3A nowadays. In the Netherlands only very simple re­ quirements are set up: the airplane must be a recognizable reproduction of a full-scale one, and in particular the shape of wing, fuselage, and rear surfaces must resemble those of the real one. M inim um span is 2 meters (6 feet, 8 inches) for monoplanes, and 1.80 meters (6 feet) for biplanes. Maxi­ mum weight, ready for takeoff, is 12 kg (26 lbs., 10 oz.). There are no restrictions with regard to engine capacity or power, and to stimulate diversification in airplanes en­ tered, a bonus of 10% is given for biplanes. The list of maneuvers, to be executed in the given order within a box of 3 x 60 degrees is as follows: 01. Double Immelman k =3 02. Stall turn k - 1 03. Adverse rolls k - 3 04. Split-S k - 1 05. Outside looping k = 2 06. Split-S (from inverted pos.) k - 1 07. Figure 8 (horizontal) k - 3 08. Turn w ith’/z roll k - 1 09. Square looping k = 3 10. 1/2 Cuban eight k - 1 11. Cuban eight k - 2 12. Immelman k - 1 13. Spin 2 x 360 degrees k - 2 For the experienced pattern pilot this Menke Knol and Willem Wolterink, builders of the 92-inch Reed Falcon. Built from a 3-view from Turnaround schedule won't look too a German magazine, the ship weighs 26 lbs., is all wood, w ith foam ribs, and is powered by a 4.8 difficult. In Germany they have an A and a B cubic inch engine. Colorful finish is Super MonoKote. schedule, to cater both for the experienced 2.7 cu. inch Saito four-cycle twin. The 16- powered ships, but, more important, also a and the novice competitors. Because of the pound ship performs excellently, and the number of pilots w ho have never been in­ lesser number of pi lots in our smal I country, engine provides power to spare. Jan earns a terested in flying pattern before! a single schedule was chosen, with the living with his well-stocked hobby shop, ENGINES need to avoid discouragement of would-be and is the Dutch importer for both the Saito In the May issue of MB I wrote about my competitors in mind with regard to the and the Tony Clark products. Other designs positive experience with the longstroke maneuvers listed. competing are the Diabolo, the Laser, and OPS 30 Maxi engine. At 1.8 cu. inches, this Until now, the best pilot at the meetings an interesting Reed Falcon biplane (92 glow engine performed very well w ith rela­ has been Jan van Beek, who has been the inches), powered by a 4.8 cu. inch two- tively large props. I also hinted at the possi­ Dutch F3A champion several times. He flies stroke. The realistic maneuvers of these bility of an extensive test report by Mike Bil- a 95-inch CAP 21 from one of Tony Clark's large model airplanes attract considerably fabulous Practical Scale kits, powered by a more spectator interest than the smaller .61 Con tinued on page 70

A 99-inch span Diabolo, powered by a 3.6 cubic inch A M T King. It The Diabolo again, and no, it didn't crash! It disassembles easily for weighs 18 lbs., and is suitable fo r aerobatics. transport All wood construction, except foam ribs, by Menke Knol.

50 MODEL BUILDER More About C02

• We are privileged to present information By BILL HANNAN. . .In Part Two model had not flown! And, the audience and rare photographs this month, received we visit Bill Brown, who popular­ must have been properly impressed, be­ from Bill and Dave Brown, of Brown ized C02 power in America. cause Campus Industries did go into pro­ Junior Motors, Incorporated, concerning a duction with the A-100 as well as the pioneering C 02 engine. larger Bee C 0 2 engines. Both engines fea­ During 1940, Bill Brown IV, well-known tured small refillable tanks, which elim i­ for his ignition engines, decided, as he put nated the need for a model to carry the it: "half-seriously to make a C 02 engine." bulky and heavy soda capsule. A friend had taken him to see some in­ During the 1970s when Brown designed door flying scale models being flown in a his metric series of C 0 2 engines, the Philadelphia, Pennsylvania armory. A l­ smallest of the line, the A-23 "Peanut" en­ though Bill was impressed with the gine featured a bore and stroke of 3 mil­ models, he felt they might offer more real­ limeters.. .nominally 1/8 inch, reverting ism and fun if powered by actual engines, to the size Bill had selected for his first rather than twisted rubber strands. He successful C 0 2 engine, some thirty years conducted an informal survey among the previously. model builders and they were quick to ■W ------FOREIGN ACTIVITY agree. O f historical note is the advertisement Brown next constructed an R.O.G. ap­ from Aero magazine for April 6, 1912, proximately the size of the flying scale which describes "NOMIE" brand rotary en­ models he had seen and conducted a se­ gines which could be operated from C 0 2, ries of tests with it to study the torque and compressed-air, or steam. It is assumed that duration characteristics of the rubber mo­ the "NOMIE" name was derived from the tor. Through an elaborate set of calcula­ "GNOME" brand of full-size rotary engines tions, Bill arrived at the internal dimen­ used during that era. sions he felt would be required to achieve German enthusiast Klaus Jorg Ham- similar performance from a C 02 engine. merschmidt attended the Jiriho Smoly The "magic answer" was a bore and stroke Memorial Contest conducted in Czechos­ of 1/8 of an inch. Such an engine was lovakia. Featured were events for C 0 2 pow­ built, employing a timing valve in its Bill Brown seated at his drawing board during ered models, and the turnout was about a crankshaft, but unfortunately it was not 1942. The small jeweler's lathe behind him dozen non-scale designs and some 18 scale was used in making his first C O 2 engines. successful, and Bill returned to his draw­ types. In spite of breezy weather condi­ ing board. capsule. When this engine was being tions, many good flights were made, with It was about two years later when he ar­ demonstrated in a model aircraft to pro­ winning models achieving durations of rived at the design shown in our photo­ spective share-holders in Campus Indus­ about 100 seconds. graphs. Bill and his wife Dorothy were liv­ tries during 1946, it proceeded to disap­ The winning Czechoslovakian scale ing in a small apartment at the time, and pear into the sky, never to be seen again. modeler, Tonda Alfery, has written of his the engine was made on a tiny jeweler's Although everyone felt regret about the suggestions for extending duration in lathe in one corner of their dining room. loss of the model and its historic little Modelar magazine, and thanks to transla­ Featuring a spring-loaded poppet valve, it powerplant, Bill Brown calmly explained tions by Fritz Mueller, we have some high­ operated directly from a C 02 "soda-fizz" that it would have been much worse if the lights: Alfery points out that the specific

Two of the author's C02 models. On the left is the Brown Junior .005· Brown tank and filler progress over the years: from top left, a Campus powered Farman F.451, winner of the Open Free Flight Gas Scale at A-100 steel tank, two variations of Campus Bee steel tanks, and three the 1977 Nationals. On the right, a Nieuport monoplane powered by sizes of m odem aluminum tanks. Second row: an early Campus charger a Brown Junior A-23 Peanut engine. Between the models is the only made from sheet steel, next a cast version, then a large capacity C O 2 ground support equipment needed: a C 02 capsule and charger. storage tank, followed by two variations of cast chargers.

NOVEMBER 1986 51 The early Brown CO 2 engine prior to assembly. Note spring and pop· Brown C O 2 engines, from left: A Campus A-100; A-100 with remote pet valve, which was replaced on later engines by a pressure-loaded tank; Campus Bee; Brown designed O.K.; Micro-jet; an .005 engine; ball valve. Photo: Bill Brown. and at right, the Brown Junior T w in , since discontinued. N Ο Μ IE rotary MINIATURE MOTORS CARBONIC ACID GAS MOTOR FOR MODEL AEROPLANES Cuu bo used with cuiuprcsecil air. steam or liquid gun. Iuvuluublo for Model Aeroplanes. Boats, Funs, Dynamos, Gyroscopes, etc. LIGHTEST and MOST POWERFUL MINATURE ENGINES IN THE WORLD Type “A" 3 cylinder, L» Η. P. weighs complete lti ounces, speed 2,500 R. P. M. Typo "IP* 0 cylinder, & Jl. P. weighs complete 2t> ounces, speed 1,'JOO It. P. M. POWER, RELIABILITY, DURABILITY and EFFICIENCY GUARANTEED Distinctive features arc fully protected by letters of patent, our’engines hold all records for power driven model flights. GUARANTEE; Buy a "NOM IE” and if it is not all wo claim in every [respect your money will be refunded without question. Price—Type “A” complete $15.00, Type "B " $30.00, F. Ο. B. FOR SALE BY ALL LEADING MODEL DEALERS, Olt WRITE US DIRECT NOMIE ENGINE COMPANY (L*d), Aviation Field, Cicero, 111.

Advertisement from the April 6, 1912 issue of Aero Magazine offers the Nomie rotary powerplants for models, which could operate from carbon­ ic acid gas(C02), compressed air, or steam. They were available in 3-cylinder and 6-cylinder form. weight of C 0 2 is substantially greater at uid, but even then its specific weight stead­ tions, running times up to 100 seconds are lower temperatures, which means that in a ily increases as the temperature is lowered. possible. given space more C 0 2 can be stored when Thus, best flying temperatures are between With the many advantages of C 02 en­ cold. Refrigeration handbooks can provide 59 and 77 degrees Fahrenheit. Simple im­ gines, why are they not more popular? K.J. exact figures for the theoretical-minded; plements, such as a thermometer, refrigera­ Flammerschmidt explains that there is a however, the idea is that the running dura­ tor, a sensitive weighing scale, and a stop­ shortage of them in the marketplace. Fur­ tion of an engine is determined by the watch will enable experiments to be ther, some brands were sold with serious weight of the stored C 0 2. A well-filled tank conducted. defects which prevented proper operation. contains gaseous as well as liquid C 0 2 and Another simpler way to extend C 02 en­ He feels that if substandard engines con­ must be cooler than 87 degrees Fahrenheit, gine duration is to employ larger diameter tinue to be marketed: "...young people w ill because that is the critical temperature propellers. With a suitable propeller, en­ never come back to aeromodelling after a above which C 0 2 w ill not remain in liquid gine duration may be increased from 30 lot of trouble—these people have it easier to form. seconds to over 50 seconds, and with the switch on a TV set or a home computer or a It is obvious that C 0 2 is heavier when liq­ proper propeller and temperature condi­ girl friend!" ·

A selection of fuel tanks tested with the modified Hitek C 02 engine, Some of the many scale model flown in the Czechoslovakian C O 2 by K.J. Hammerschmidt Long tubular tank at left can be placed in- power contest. All employed the Czech Modela engine.

52 MODEL BUILDER

W HILE O N THAT SUBJECT « Don Typond offers this comment: "Now that I'm grayer and mellower, I'll relax and fly Bostonians indoors." STATIC SHOW & SWAPSHOP Wade Johnson Jr., director of the North Carolina Model & Hobby Expo, tells us that all manner of miniature aircraft, ships, boats and cars w ill compete on November 29th and 30th for trophies in 15 different static display events. To be held in the Charlotte Merchandise Mart, the show will feature as special guest, World War II fighter ace Robert S. Johnson. Information is availa­ ble from Carolina Model & Hobby Expo, 3452 Odell School Rd„ Concord, North Carolina 28025. Please tell 'em Model Builder sent you'all. . . . QUETZALCOATLUS KINGKONGI? The 1933 motion-picture King Kong ap­ peared on local television recently, and among the creatures who threatened ac­ tress Fay Wray was a pterodactyl, which at­ Philosopher/author/modeler Richard Miller Jeremy Booth shortly before he proxy-flew tempted to fly away with her. This particular celebrates his 62nd birthday, showing he has Dave Linstrum's Top Gun Bad Cat Bostonian prehistoric bird was a short-necked variety not lost his indoor glider launching technique. over the border into Mexico. who flapped quite convincingly until plucked from the air by gorilla King Kong. example, the "living wing" apparently was fragile nature of the pioneer design. Thus, THE COLONEL SAYS equipped for lateral control via wing­ testing is proceeding with great caution to Explaining a decline in local R/C scale warping, and the rigging mechanism re­ minimize risk to the pilots. Modern con­ contest participation, Colonel Bob Thacker sponds perfectly to such actuation. Another trols have been installed for safety reasons, modestly suggests: "Some fellows won't remarkable discovery was Whitehead's fa­ however they will be employed only as enter if they know they can't win. In my m iliarity with a reflexed airfoil for the wing, emergency overrides in the planned series case, I'm so famous it doesn't matter if I win which contributes importantly to pitch of performance evaluations when prelimi­ or not." stability. nary testing is finished. Initial power experi- CLIFF ROBERTSON TESTS WHITEHEAD Both O'Dwyer and Cartabiano are very The Whitehead #21 full-size reproduc­ safety-minded and are well aware of the Continued on page 92 tion testing continues amid a flury of politi­ cal controversy and media coverage. One of our photos shows the craft in tethered flight above its trailer, where it remained for about a half-mile under the guidance of test-pilot Andy Kosch. Model builder Bill Wargo also piloted the craft successfully. On July 11th, film and television star Cliff Robertson (also a former modeler!) took over the helm for three public demonstra­ tions of the Whitehead, and expressed his delight with the reproduction's perfor­ mance. We were fortunate in visiting with project leader Bill O'Dwyer in person, and with Mike Cartabiano, chief of engineering and flight testing, by long distance telephone. Both men were enthusiastic about progress to date, and have found the design much The Whitehead reproduction in tethered flight during pitch and roll stability tests at about 35 more advanced than originally realized. For miles per hour, behind tow car. See text for details. Photo: O'Dwyer.

Now you see 'em: Bill Warner shows the landing gear of his Crocodile Now you don't see 'em: Warner's Embryo model with its landing gear Airlines Embryo Endurance model in extended position. in retracted configuration.

NOVEMBER 1986 57 explanation would do it justice. Enjoy it, just as Don intended. NOVEMBER MYSTERY MODEL This is a true nostalgia model and an in­ ternational winner as well. As yet, I haven't seen one flying in the Nostalgia meets here in the N.W., and maybe it's because the available plans are both difficult to under­ stand and poorly printed. It may also be be­ cause the ship is not easy to build, due to a completely planked oval-sectioned fuse­ was an O&R .23-powered old timer that was lage. Whatever the reason, this ship could called The Victory, as I recall. be just the ticket for you if you are thinking Just last summer, Don built one of Phil about something a bit different and still Hainer's Air Express 330 kits. He trimmed it competitive in the Nostalgia events in your out one day in the rain and proceeded to get area. But before you set out to build one, himself in a flyoff, winning second place. you'd be well off to identify it. If you know During the summer of 1985, a number of the name of the model, drop a card or letter the area free flighters, spearheaded by the to Bill Northrop, do Model Builder maga­ efforts of Bill Giffen, decided to honor zine. The winner w ill receive a free sub­ Don's dedication to the local contest scene. scription to my favorite magazine. Don was presented a classy engraved silver DARNED GOOD AIRFOILS—Bill East's serving tray with matching cups. This award Hybrid Power Section was presented to him at the end of the an­ Some time ago, Australian Power flier, Bill nual Autumn Thrash, just weeks after we all East, presented a paper to the Australian • I first ran into Don Zipoy at the Harts learned that Don had contracted cancer. Free Flight Symposium detailing a system Lake Prairie Free Flight site just south of Ta­ After hospitalization and chemotherapy, that he uses to develop his own airfoils. This coma, Washington. The year was 1963 or Don appeared to be on the recovery trail. I system has allowed him to prepare a special so. Don was the contest director of one of saw him at a contest in June and he looked section utilizing the best characteristics of the larger meets in the area. The contest better than he had for several months. On airfoils that he likes. This month, and again was well organized and all pertinent rules July 16,1986, Don Zipoy went searching for next, I w ill present two of Bill's airfoils. This were enforced in a friendly but firm man­ his final thermal. He was 57 years old. For month is his hybrid Power section, next ner; it was a Zipoy trademark. In later years those of you who did not have the pleasure month, his A-2 section. Here's Bill: I became more appreciative of the efforts of knowing him, you will never know what "Sometimes I find it difficult to decide that Don expended on behalf of the free you missed. For those of us who knew him, what airfoil should be used when designing flighters in the Northwest. His directions to his passing leaves a tremendous void. An­ new models. Recently I have combined air­ the fliers were concise and tinged with hu­ other of our best has gone leaving a larger foils to provide a single hybrid airfoil to give mor. For ten years or so he was the C.D. of responsibility to those of us who remain. me desirable performance on a few the famous Boeing Management Associa­ Don, all of us enjoyed you while you models. In this paper I have included two tion Scholarship contests. Once again, the were here. You left us much too soon. May such airfoils which I have plotted. These air­ organization was impeccable as was the your last flight be the greatest of all, my foils are, in effect, the average of several suc­ contest operation. friend. cessful airfoils. The camber lines on these Don rarely flew in these contests. On the OCTOBER THREE-VIEW—The Turkey airfoils are the mathematical average of the rare occasions that he did take a model out Buzzard by Don Zipoy top and bottom coordinates of the three ba­ of the car and put it into the air, it was I know that many of you may have seen sic airfoils used to produce the hybrid air­ usually a well-preserved ship that he had this drawing in an earlier day. It seemed ap­ foils of each type. built years earlier and kept in excellent con­ propriate to share Don's sense of humor "I make no claim of better performance dition. My memory serves up only two with the current readers of the Model from these hybrid airfoils compared to the models until last year. One was his unique Builder Free Flight. Needless to say, this basic airfoils; innovation is used and no Crispy Critter, FAI power ship. The other three-view just needs to be studied, as no reference w ill be made to airfoil theory

L. Payne preps his Sparky for an official flight at the SAM 1 meet in Colorado. Photo: David SA M 1 members pose w ith Sparky models. All configurations of Ed Lidgard's classic design were Ramsey. present. Meet was held in the Denver area recently. Photo: David Ramsey.

58 MODEL BUILDER relating to entry angle, nose radius, etc. "For those wishing to plot hybrid airfoils (a calculator is handy to speed up calcula­ tions), these airfoils can be produced very quickly provided, of course, pencil, rule, and curve are available. Basic Airfoils Used "For the two hybrid airfoils shown (A-2 next month) the following basic airfoils were used, these being selected by popular choice. A-2: 1. Hacklinger HA 12 2. Benedek 6456F 3. Kaczanowski CF 6 Power: 1. Rhode St. Genese 28 2. Rhode St. Genese 29 3. Neelmeyer "Most airfoils can be used to plot hybrids; however, it is best to group suitable airfoils together; i.e., undercambered, flat bot­ tomed, for A-2 and power respectively. The hybrids are similar in appearance to the original airfoils used; however, the coor­ dinates are quite different. Many different hybrids can be designed to give such desired features as smaller nose radii, thicker trailing edge, more camber, etc. Using John Malkin's collection of airfoils, approximately 80 hybrids can be plotted. "Another useful method which I use to modify is the thickness percentage error de­ airfoils are long time standards in the power nuals. These w ill undoubtedly appear as fu­ velopment method. This is a simple model field. ture three-views and mystery models. For method to either increase or decrease the Next month, Bill's A-2 (FIA or Nordic) those of you who look for these features in thickness of airfoils for a particular need; section. Stay tuned. the Free Flight Column, hone your memory i.e., tailplane companion. To illustrate: as­ LYMAN ARMSTRONG STRIKES AGAIN of things English. sume that an 8-inch chord airfoil is to be One of my most persistent and generous BUNT SYSTEMS REVISITED plotted, and the thickness is to be increased correspondents is Lyman Armstrong, who The bunt system for FAI Power (F1C) 2.5% above the original. First, take a 1/10- lives in Yuba City, California. Lyman is one models has become the standard for inter­ inch division rule and divide the 8-inch of the old timers in modeling, and fre­ national competition. Recently, I have been chord into 10% stations (.8-inch divisions), quently submits comments on recent col­ experimenting with various systems myself then divide the first 10% into smaller divi­ umns (none of which will be reprinted in an attempt to obtain a lightweight, yet sion: .2-2.5%. Then plot the top and bot­ here). Lyman recently made me an offer that foolproof bunt arrangement. To inform tom coordinates as a percent of a 10% I couldn't refuse—he offered a collection of those readers who might not be familiar chord. The foregoing example is simple, vintage English model magazines and an­ with the bunt system, it is a timer-actuated but for other chords it is just a matter of ap­ plying some arithmetic. "For thin airfoils, work in reverse; i.e., a 5- inch section stretched to 10 inches will yield an airfoil half the thickness. 'The hybrids I have shown and the meth­ ods used to obtain them could be of some use to those scratch designing new models." So, dear reader, if you are still with me, take a look at Bill's hybrid power section. As he indicated, it is a mathematical combina­ tion of the R. St. Genese 28 and 29 along with the Neelmeyer sections. All of these NOVEMBER A IR F O IL - Bill East's Hybrid Power Section

STA 0 1.25 2.5 5.0 7.5 10 20 30 40 50 60 70 80 90 100

UPR 1.8 3.57 4.12 5.08 6 6.69 8.13 8.38 8.01 7.35 6.31 5.03 3.48 1.79 0

LWR 1.8 .88 .239 .19

NOVEMBER 1986 59

The late Don Zipoy with his latest model, an In October, 1985, Don Zipoy was presented a plaque by the free flighters of the Northwest for A ir Express. Don's passing leaves a large his years of selfless servise as Contest Director par excellence. Presenting the engraved silver void with free flighters in the Northwest. platter to Don is Bill Giffen. device that increases the positive incidence of the stabilizer at the conclusion of the power run to bring the model into a horizontal flight condition during the tran­ sition from vertical climb to glide. The tail- plane angles for Mario Rocca's latest FAI Power model as detailed in the February 1986 NFFS Digest are as follows: Power - —.20 inches; Bunt = +.41 inches; Glide - -.35 inches. Simple mathematics will show you that the change from power to bunt is a total of .61 inches and from bunt to glide is .76 inches. Recently, I took a good look at Ralph Cooney's Summerwind derivative model and his power to bunt change was approxi­ mately .3 inches and from bunt to glide was about .45 inches. Ralph's model balances in the 60% range; whereas Rocca's model balances at 48 inches. This difference in balance points helps to explain the differ­ ence in the incidence angles needed for the transition from power to glide in these two models. The farther forward the C.G., the greater the change in incidence needed to effect a change in the flight characteristics. Ralph Cooney's bunt system uses a spring-loaded line to pull the stab into place for the bunt (see Fig. 1), which when released, allows the stab t.e. to raise to the glide position. Although the system works well, it does put a great deal of pressure upon the timer arm which carries the other end of the spring loaded line that forces the stab into the bunt mode. It struck me that a better system might be to use a spring-loaded arm that would not require the timer to carry such a load. As I began to work on different systems to carry out this scheme, I ran across the same kind of gadget as developed by the Englishman, Stafford Screen. This system appears as Fig. 2. For your information, the system de­ signed by Screen weighs in at 10.5 grams, in my version. This is compared to a similar but non-bunt system that I use that weighs in at 8.5 grams—so the device does not add a big weight penalty. Jim Booker readies his 1/2A Maverick, a Tom Hutchinson design, for an official flight in pursuit Continued on page 75 of a Category II record.

NOVEMBER 1986 61 43469.1 might add that Dave sends along a survey sheet to see what you like or dislike about the kit, and what can be done to im­ prove it. . .also what other airplanes you would like to see kitted. Dave wants to please!! Here is an update on the use of Solartex. For those of you w ho may not know, Solar­ tex is a superior fabric covering material used primarily on powered models, specifi­ [PM gpa cally R/C models. It is an iron-on heat- shrink fabric that easily goes around severe compound curves. It is relatively light in By FERNANDO RAMOS weight, and finishes up quite nicely. sJ'Sii'J'a- I decided long ago, that I would never again cover a powered model, .020 size in­ cluded, with tissue again! I had built a • There isn't any better way to start this tion of price. Obviously, this was an over­ model of the Avro 504 which had an inor­ column than to report about a brand new sight on his part. For further information, dinate amount of lettering on the fuselage product on the market! Dave Diels certainly drop Dave a line. His address is, Diels En­ and wings, and after a few test flights, there needs no introduction in this column since gineering, Inc., Box 101, Woodville, Ohio were punctures where the lettering was. he has been furnishing us with rubber scale The weight difference can be measured in a plans at an incredible rate! Well, Dave has couple of ounces. I have found that the an­ out done himself by coming out with a ter­ tique color has the least, if any, pigmenta­ rific kit of the Boeing F4B4. tion, therefore should weigh the least. I ex­ The model is 1/24 scale, giving it a wing­ pect that white probably weighs the most of span of 15 inches. The kit features printed the colors available. wood, the printing being done with an iron. O f the several models that I have covered The lines are a bit heavy but not too bad. with this material, I have always brushed on Dave is planning to use silkscreening on fu­ a couple of coats of clear prior to spraying ture kits. The quality of the wood is very the color. No matter how careful I was good and lightweight. However, the one brushing the clear, brush marks could be item that really got to me was the decal seen on the final finish. Needless to say, this sheet. It contains everything you would ever was quite disconcerting. The solution to want to put on a model like this.. .real avoid this from happening, is an easy one. quality! Just spray the clear dope instead of brush­ ing. I would recommend that you start by The construction of the model uses the thinning 50/50 dope and thinner. This is half-shell method. This type of construction done so that the dope can penetrate into is fairly popular, ala Guillow, but can be the fine weave of this material. You w ill made a whole lot easier, if you use the fix­ never get the dope to soak through, which ture I designed some time back. (I've dis­ is so typical of silk and other similar fabrics. cussed this several different times over the There are two reasons for this. One is that years. It really makes the half-shell method the weave is very close, and the other is that a breeze to use.) the adhesive used for attachment is uni­ At any rate, I think Dave is on the right formly distributed on the backside. Even track for providing us with an opportunity thinner cannot flow through. to build one of the great classic military One major criticism I have with this planes of all time. With all of the informa­ material, is that over large sheeted areas, it tion that Dave sent me, there was no men­ duct tape. tends to trap bubbles. By poking the bub­ bles with a pin, and then applying heat, the bubble disappears, but then returns. There is a new tool on the market that looks a lot like a flower frog (A gadget for holding flowers in a vase), except this has fewer spikes. The object is to perforate the surface with many fine holes, then the air cannot be trapped. A friend of mine bought one and tried it on both balsa and foam surfaces, and commented that it worked perfectly! W hile covering a fuselage with Solartex recently, I encountered the same problem I have using Japanese tissue. That is, trim­ ming the material on a stringer that already has tissue attached to it. I found a solution for trimming tissue, so I figured the same principle can be applied to fabric-type materials. For those of you who may not know what I'm talking about, I'll review it for you momentarily. (See Fig. 1.) The idea here is to attach the material properly in or­ der to get the proper contour, and to be able to time it neatly and precisely. The first thing to consider is attaching the material

C ontinued on page 74

MODEL BUILDER FOR TEACHERS

Glue together Bend the tabs tor the wing and tail ONLY h a c k in g in flm order. N'- before gluing the fuselage together. Fuselage assembly order By RAY ROBERTS

Dear Fellow Teachers, This month I have the in­ structions for building up the CESSNA 210 wing and fuse. If you want a strong model that flys well, you must glue the parts together carefully. The fuselage part numbered 1 will be in the center, with numbers 2 and 3 on its left and right. Glue the parts in order as shown in the drawing. INSTRUCTIONS 8. Coat with glue all of the surfaces to be joined, and fit them together quickly and accurately. 9. Next put these parts be­ tween two pieces of wax paper! 10. Place the laminated parts with the wax paper inside a stiff book. Again make sure the wax paper covers the parts to protect the pages of the book. 11. Stand on the book for 15 to 25 minutes. 12. Let the parts dry overnight. 13. Place small pieces of wax paper between the wing and horizontal holding tabs. This w ill keep the parts from gluing to­ gether while pressing. 14. Glue the wing and wing backing parts to­ gether. Keep the arrow marks for­ ward to the leading edge. 15. Place the wing and wing backing parts in­ side some wax paper. 16. Place in a book for press­ ing as was done with the fuse, and let dry overnight. NEXT MONTH: How to put the parts together, balance and adjust the Cessna 210. (How to make the catapult will also be included.)

NOVEMBER 1986 63 .15 Combat (same rules as AMA Fast Combat) Phil Granderson, Portland, Oregon AMA Slow Combat Dick Salter, Seattle, Washington AMA Fast Combat Gary Byerley, Spanaway, Washington By MIKE HAZEL PHOTOS BY THE AUTHOR Stunt (all classes combined) Randy Schultz, 509.5 points, Seattle, Washington • Your wandering columnist meandered of events. This turned out quite well, which Scale (sport class) up to British Columbia on July 21-24 to take I understood was contrary to the wishes of Orin Humphries, Spokane, Washington in the Canadian National Championships. the overall Nationals administration which Profile Carrier All three control modes were featured, but was basically R/C oriented. Despite some Bob Parker, 228.6 points, Renton, unfortunately there was not a site secured silly administrative and operational obsta­ Washington that could accommodate all activities. That cles that the CL segment had to put up with, Class I & II Carrier being the case, Control Line, R/C, and Free the officials from Vancouver Gas Model Richard Wallace, 303.6 points, Sequim, Flight all had their own individual contest Club were able to put on a good show. Washington sites. As expected with the lower than antici­ Mouse Race (class II) The Control Line events were held in pated entry, the com petition ran at a Paul Gibeault, 10:24, Edmonton, Alberta Richmond, which is a suburb of Vancouver. relaxed and easy pace. Here are your Goodyear The site was very nice, and adequately han­ winners: Paul Gibeault, 8:09, Edmonton, Alberta dled the entry. N W Sport Race Having the Nationals in this locale was a Henry Hajdik, 8:40, New Westminster, unique situation, as it has always been British Columbia more centrally located. This being the case, AM A Rat Race the number of expected contestants was a Dick Salter, 5:46, Seattle, Washington large question mark. The Expo, being held A Speed in Vancouver, was expected to be a drawing Ron Salo, 164.92 mph, Burnaby, British card. As it turned out, the Expo appeared to Columbia be somewhat a deterrent for a few. The Formula 40 Speed Expo is a very large event, and while ac­ Paul Gibeault, 150.69 mph, Edmonton, commodations were available, they were Alberta quite expensive. This probably kept the en­ Record Ratio Speed try down more than anything. There were a Paul Gibeault, 149.82 with Formula 40, few CL pre-entries that did not show. I un­ 90.76%, Edmonton, Alberta derstood that this was the case on the R/C * * * site, also. NEW PRODUCTS DEPARTMENT The entry was also affected by another Fox Manufacturing has just released a phenomenon, for which I do not know the new glow plug, which should be in your lo­ name. That is, it is always farther for the East cal shops by the time you read this. It is be­ Coast people to come West, than vice ing targeted towards the four-cycle engine versa. This has been typical of the US Na­ users, but should also have other applica­ tionals. Someday some geography profes­ tions as per the press release: sor w ill perhaps explain how that works. "Fox Manufacturing is proud to introduce This year there was a new wrinkle. Since the new Fox four-cycle special glow plug as it was anticipated that the majority of CL an addition to its fine line of motors, glow contestants would come from stateside, US Racing pilots have at it at the Canadian Nats: plugs, and accessories. The new four-cycle competition rules were used in the majority John Thompson, Roy Andrassay, Rich Salter. special, the 'miracle plug,' is a totally new concept in glow plug design, with several new features that enhance its ability to re­ tain heat and boost performance. The mira­ cle plug has an extra heavy rhodium and platinum element enclosed in a restricted- entry cavity to protect it from cooling. These features combined with a built in pre-combustion chamber eliminate the need for an idle bar while providing maxi­ mum power and reliability. Also, the nose is extended on the miracle plug to permit easy installation in motors where access is restricted. "We call this new plug the miracle plug because it is much more than just a four­ cycle glow plug. The miracle plug has the ability to ignite the fuel in your two-or four­ cycle motor at the proper time under a wide range of conditions regardless of heat input. The miracle plug does this better than any other plug we have tested. It is a superior glow plug for two-cycle operation and it w ill provide smoother throttle response, in­ creased reliability, and better performance even with low nitro fuel. W ith its special heat retaining capacity that makes it a great

6 4 MODEL BUILDER four-cycle plug, the miracle plug has the ability to prevent flame-outs in two-cycle motors even under the most adverse condi­ tions. Tests also show reduced fuel con­ sumption in many cases." Hokay, this product is going right to the testing department, and we should have some results to report next month. I don't have any four-cycle engines to try this in, but some of the two-cycle applications may prove to be useful. It sounds like Scale and Carrier planes may benefit here, as they do run throttles and sometimes suffer from flame-out problems. Several of the Stunt fliers also use an idle bar plug for a smoother transition and steadier engine runs. This new plug may also be of benefit here, too. More later. ♦ * * Are you West Coasters looking for a big Ooops! Mouse racer has just bounced off pitman Paul Gibeault's hand during high-speed catch. meet to attend to wrap up the season? You may want to consider hitting the big AAA affair in El Monte, California on October 18 and 19. This will be held at the Whittier Narrows site, and w ill feature just about every Control Line event. For more informa­ tion, send a self-addressed-stamped- envelope to: Morrie Leventhal, 1788 Niobe Avenue, Anaheim, California 92804. Better hurry! • ♦ * The newsletter from the Orbiting Eagles club in Omaha, Nebraska is always chock- full of good stuff. Here's an interesting piece that was written by George Lieb: "Wonder why getting hit by a prop hurts so much and can cause so much damage? Prop blades are very thin and are going a very high rate of speed. Some racing props Bob Parker's profile Bearcat is just a couple of inches away from snagging arresting cable during are also very sharp. Occasionally FAI speed landing phase of Carrier Event at the Canadian Nationals in British Columbia recently. planes have the prop tips go supersonic! scream and a cloud of smoke emitting. take a look at that cloud of smoke. Actually (Rpm of 34,000+. . .mwh) Many bullets This, no doubt, is very harmful to your en­ it's always there, but during a shaft run you are slower than this! Here is a chart of prop gine, right? Wrong! Very seldom is any dam­ have little, if any, prop blast to blow it away. tip speeds for several sizes of prop and rpm. age done. Let's take a look why. First, let's Also consider that with the engine running high rpm it is consuming more fuel, thereby "Diameter 10,000 rpm 5,000 rpm 20,000 rpm throwing out even more exhaust. 6 inches 178.6 mph 267.7 mph 357.2 mph Next, consider the fact that the engine is 7 inches 208.3 312.5 416.7 running with almost zero load. That engine 8 inches 238.1 357.1 476.1 running during a shaft run is probably more 9 inches 267.9 401.9 535.8 happy than a fresh new green engine being "The reason prop tips seldom go above "broken-in" with an oversize prop. Please about 550 mph is that drag increases rap­ don't misunderstand this discussion as say­ idly near supersonic speeds." ing a shaft run is a healthy thing, it isn't. I These figures give one some thought as to have had engines break when it happens, the occurrence of a prop shedding a blade. but more often than not, everything is OK Prop blades seldom go very far, but do afterwards. move a short distance very rapidly. George's The thing that you do not want to do is to figures serve as a sobering reminder to exer­ panic, grab the plane and stuff the nose end cise great care around running engines. Al­ into the ground in an attempt to stop the en­ ways pay close attention to prop condition, gine. This w ill do more damage than any­ and avoid reaching around a running en­ thing. What you do want to do is to either gine. Think safety! pinch the fuel line, or get your finger over Backtracking to that chart, how close the carb. A tuned pipe speed plane can be have you come to having a prop go super­ instantly shut down by blocking the ex­ sonic? Methinks the only way I w ill ever haust outlet in the rear. achieve it is to put the prop in the baggage A shaft run w ill usually induce a bit of section of a jet fighter. vibration, so for that reason it is a very good * * ♦ idea to check out the airplane structure. En­ gine mounting bolts and control systems Ever have the experience of your engine have a bad tendency to loosen up. Also losing the prop while it's running with the look for any stress cracks that may have sur­ resultant high rpm scream? The cause can faced in critical areas. be the prop coming apart, or simply com­ What s wrong with this picture? Note direction of lines! Mel Lyne and Phil Granderson m ix it That's all for now, fly safely! ing loose. When that happens, and the en­ up with a line tangle during hot combat flying Mike Hazel, 1073 Windemere Drive NW, gine keeps running, there is a hellacious at the Canadian National Championships. Salem, Oregon 97304. ·

NOVEMBER 1986 65 CHICKUMS SArt £>~~ s

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Ψ. 4 N* « 5.* v y *·*“ foT<* % - Ιϋ ^ ρ ω :- Vb „ L !K g N E » st5

2646 Bolker Drive, Port Hueneme, California 93041 (805) 984-6639

• The latest effort of the lads has been the were discussing a problem given us by a should have figured this out. To get right design of a flying laboratory to test all sorts friend who is involved in the Channel Is­ down to it, of late you haven't been sailing of things in flight, using a down-link to send lands Harbor to Anacapa Island Outrigger w ith a full sea-bag, and it looks as if what data back to the ground crew. This aircraft Canoe Race. He asked us whether it is best you do have in it isn't rolled and tied right!" w ill do its thing in much the same way as to use paddles with a small area and a large Chickums went over to the cooler, Sillie the Remotely Piloted Vehicles of Israel and number of strokes per minute, or use pad­ moved aside, and Chickums drew a long, the US—which have been used with out­ dles with larger area and fewer strokes per cold one. standing success. The aircraft has already minute. This is an interesting prob. .." I These remarks drew heavily on my been named PAYPOD and will be pub­ broke in again, yelling this time. Sillie broke management reserves. I fell back to my lished in Model Builder in the coming for the water-cooler. withdrawal position, studied my fingernails months, MNWAITCDR (Mr. Northrop W il­ "You guys don't seem to realize that we w hile hummingan off-key tune, brushed an lin' And If The Crick Don’t Rise). It is a really are running a Top-Priority project! We have invisible mote off the creased knee of my interesting project and uses available prod­ to get PAYPOD and her informative pay- Brooks Brothers jumpsuit, looked up at ucts of Ace R/C, Radio Shack (some equip­ loads in the air as soon as we can, or ASAP, Chickums from the tops of my eyes and ment is modified, of course) and other sup­ as they put it in governmentese! Why aren't calmly requested him to explain the value pliers. There are no problems with you working o n . . o n . . . " I was looking at of the alleged propeller research. I con­ PAYPOD, and those with the down-link are, the piece of paper I had picked up ",. .this tinued the humming and fingernail exami­ for the greatest part, generally solved. propeller research!" This picked up my re­ nation, knowing the Brooks Brothers crease Perhaps the lads might be induced to give lay again! "How do propellers relate to will stand alone. After all, this product us a status report update! They are in the Project PAYLOAD?" I sat down heavily in offers something in return for the fact that Hangar hard at work on this sterling and my Director's chair without bothering to you can't buy a pheasant under glass lunch Highest Priority project! brush off the pin feathers. with the savings gained by buying your As I entered Hangar 3 ,1 was most pleased Sillie had gulped down his third glass of jumpsuit from C & R. to note that Chickums and Sillie were deep Speaking a trifle loudly to offset the tune water. Chickums looked at the ceiling and in serious consultation. I picked up a piece I was humming, Chickums began, "Chief, calmly replied, "Let's call the paddle epi­ of paper from the floor and pretended to modelers want to try special props from sode an effort to improve public relations. study itasl listened totheirconversation. (A time to time and often can't find them avail­ Let's call the propeller research an effort to useful trick learned in Management Class.) able. Sillie and I did a little thinking about improve relations with Mr. Northrop. He Chickums was talking. prop design and developed some very sim­ likes this sort of thing and you have only ". . .and itfollows that this is the most effi­ ple equations and some offsets to draw a one P&F&CT in his editorial offices at the cient and, therefore, the design best utiliz­ blank from a 6-inch diameter to a 37-inch moment. There will be a delay in getting ing the work potential available for the two diameter in increments of 1 inch. Frankly, any kind of article off on PAYPOD. Jefe, you options under consideration!" Sylvestor Sillie and I were going to confine our calcu­ nodded his head sagely in agreement. I lations to a diameter of 16 inches, but could not contain myself and broke into Dennis Stimson dropped by—you know theirconversation. This, of course, is always Dennis, we have been trying to talk him Management's droit de sire, which means back into the hobby—and he promptly dis­ this action, and others that do not apply at appeared when he saw us punching our this time. calculators. He returned before too long "I could not help but overhear your con­ with the offsets from 6 inches to 25 inches. versation with Sylvestor" I interjected. He had plugged our equations into his "Have you made a breakthrough on the al­ computer and that is what we will show in timeter problem w ith PAYPOD or the a little bit as Table I! Denny saved us a lot of problems with the down link frequency-to- fingerwork on the computer and we are voltage analog problem with the ground most grateful! We think you should give support equipment? I think you lads are do­ him a break on a kit!" This made me start ing an absolutely superb job on this humming a littler louder! Chickums con­ project!" I thought about the Management tinued, "Sillie did a lot of this work, so, Old Ground Rules about praise w ithout a Catch Chum, why don't you take the stick?" 22. "O f course, with the money you have Sillie paused a moment. Obviously, if been spending you should come up with the pitch angle G was constant for all values something!" My bases were covered! of x, the pitch would increase as the section "Actually, Jefe," drawled Chickums, "we moved out toward the top; and each blade

66 MODEL BUILDER element would advance at different rates, Therefore, we shall discuss the achieve­ Chickums—I'm afraid I was going to over­ resulting in a very confused propeller and ment of the design objectives and omit their look it!" said Sillie. 'The only thing left to performance very similar to that observed development. define in Figure 2 and Figure 3 are the when a gang of monkeys have designs upon "The trailing edge of all sections con­ dimensions A and B. B sets the flat line for a football! Therefore, one of the options tributing to thrust w ill lie on a straight cen­ the pitch desired and 2B sets the blank line, available to us is to design a propeller with terline passing through the center of the which controls the blade thickness. B is cal­ a helical pitch, or a propeller where every shaft. All taper shall be on the front side, culated as .008P. The block line maximum blade element advances an equal distance which, with the position of the trailing thickness A is calculated as .IP and at the p in each revolution. Such a propeller is edge, establishes the arc of radius R passing shaft controls pitch and at the noted Sta­ shown in Figure 1. If values of x are chosen through the shaft center and the tip leading tion, blade thickness. In Table I are the coor­ in multiples of .1R between 0 and R, the edge. This is shown in Figure 2. Placing the dinates, or offsets, defining propeller pro­ pitch angles G may be constructed for taper on the front side only also provides a files for diameters from 6 inches through 37 each. For each value of x the horizontal stiffer configuration, for the propeller thrust inches. Dennis saved us considerable time component of the blade width, or chord, tries to bend the propeller forward, which on our calculators by his generous assist­ will be Cx and the vertical component is places all the wood in compression, rather ance, Chief!" I went back to my humming Hx. The chord line for the majority of the than some in tension. This is using the max­ and the study of my nails. "Chickums, sections, or blade elements, w ill coincide imum strength of the wood. Also, run the would you have a few words regarding the with the flat propeller backside, so H x is grain of the wood parallel to the centerline. layout and carving of these propellers?" called the 'flat line,' which we shall talk This is for reasons of maximum strength "The first thing to do," said Chickums, "is about shortly." and it w ill also make the blades easier to to determine diameter and pitch desired. A Sillie paused, again, for so long that I was carve." 'normal' propeller has a pitch half its di­ ameter. Above this is considered high pitch; about to say something (I had stopped my Chickums broke in at this point. 'The 'flat humming sometime ago and forgotten my below is low pitch. The second thing to do line' is the line that defines the pitch. The is select the wood. Use wood like maple fingernails) when he began again. 'This 'blank line' determines the blade thickness and 'real' mahogany from Africa or Hon­ gets a little sticky. Obviously, the position of in the area of the hub. In Figure 3 the point any section w ill determine the blade shape, duras, not the light Luan, or Philippine ma­ where the blank line becomes constant and the propeller must be tapered in such a hogany. Do not use oak or you w ill bend thickness at a value of A (at Station .25R) shafts and crack cases. Be sure the grain way to give both a proper flat line position will provide a slightly thicker blade. If you runs parallel with the block centerline in­ to insure helical pitch and maintain the prefer a thinner blade, this point may be side and profile views. It is assumed that desired blade shape." Chickums suggested moved toward the shaft, but no closer than that we "freeze" some design parameters so you have calculated the dimensions A, B, Station .07R. Remember, blade thickness and 2B. The size of the wood must be of that we could maintain a standard blade de­ near the hub is required for strength at high minimum thickness, .1P; minimum width, sign and prepare a blank that insures the torque operation or larger diameters." carving of a true propeller. I think we will .34R; and minimum length, 2R. Draw a "I'm glad you brought that up, not go into the derivation of the design, for centerline for the length of the face side. the resulting equations can be easily Using offsets from Table I, plot the desired screwed up before you read them. There is profile on the light cardboard, marking a an award at the Annual Typesetter's Con­ sharp center line, and cut out the blade pat­ vention that is given to that craftsman who tern. Drill a hole equal to or smaller than has demonstrated that he has best set type the shaft size in both the block center and to completely change the meaning in­ the pattern. DO THIS ACCURATELY!! Place tended by the writer and thoroughly con­ the drill in the block hole, slip on the pat­ fuse the reader. The donor of the award, tern, line up the pattern and block center- who was a disciple of Ben Franklin, was lines and draw the profile. Turn the pattern named Murphy and was honored in his about the drill, line up the centerlines, and own time by having a law named after him. draw the other profile. Remove the pattern

NOVEMBER 1986 67 1.000 0 .4 8 4 1 .1 2 5 0 .5 4 5 1.200 0 .5 5 2 1 .3 5 0 0 .6 2 1 1 .6 0 0 0 .6 3 6 1 .8 0 0 0 .7 1 6 2.000 0 .6 7 2 2 .2 5 0 0 .7 5 6 20ΤΗ ANNUAL 2 .4 0 0 0 .6 6 4 2 .7 0 0 0 .7 4 7 2 .8 0 0 0 .6 1 6 3 .1 5 0 0 .6 9 3 3 .2 0 0 0 .5 3 2 3 .6 0 0 0 .5 9 9 3 .6 0 0 0 .4 0 0 4 .0 5 0 0 .4 5 0 NORTHROP 4 .0 0 0 0.200 4 .5 0 0 0 .2 2 5 0.200 - 0.200 0 .2 2 5 - 0 .2 2 5 0 .4 0 0 - 0 .1 0 8 0 .4 5 0 - 0.122 0 .6 0 0 0.000 0 .6 7 5 - 0 .0 6 3 0 .8 0 0 - 0 .0 2 4 0 .9 0 0 - 0 .0 2 7 FLYING WING 1.000 -0 .0 0 4 1 .1 2 5 -0 .0 0 5 1.200 0.000 1 .3 5 0 0.000 VALUE OF C i 5 .0 0 0 VALUE OF C: 5 .5 0 0

CONTEST STA ORD ORD STA

0.000 0 .3 5 0 0.000 0 .3 8 5 0 .2 5 0 0 .3 1 5 0 .2 7 5 0 .3 4 7 0 .5 0 0 0 .3 4 5 0 .5 5 0 0 .3 8 0 0 .7 5 0 0 .4 2 0 0 .8 2 5 0 .4 6 2 1.000 0 .5 2 0 1.100 0 .5 7 2 1 .2 5 0 0 .6 0 5 1 .3 7 5 0.666 NOVEMBER 2, 1986 1 .5 0 0 0 .6 9 0 1 .6 5 0 0 .7 5 9 2.000 0 .7 9 5 2.200 0 .8 7 5 2 .5 0 0 0 .8 4 0 2 .7 5 0 0 .9 2 4 3 .0 0 0 0 .8 3 0 3 .3 0 0 0 .9 1 3 • Sponsored By: MODEL BUILDER Magazine 3 .5 0 0 0 .7 7 0 3 .8 5 0 0 .8 4 7 Bill Northrop, Publisher 4 .0 0 0 0 .6 6 5 4 .4 0 0 0 .7 3 2 4 .5 0 0 0 .5 0 0 4 .9 5 0 0 .5 5 0 5 .0 0 0 0 .2 5 0 5 .5 0 0 0 .2 7 5 • AM A Sanction #787 — AM A License reqd. 0 .2 5 0 - 0 .2 5 0 0 .2 7 5 -0 .2 7 5 0 .5 0 0 - 0 .1 3 5 0 .5 5 0 -0 .1 4 9 • Site: Mile Square Park, Fountain Valley, CA 0 .7 5 0 - 0 .0 7 0 0 .8 2 5 -0 .0 7 7 1.000 - 0 .0 3 0 1.100 -0 .0 3 3 • Time: 8:30 a.m. to 1:00 p.m. 1 .2 5 0 -0 .0 0 5 1 .3 7 5 -0 .0 0 6 1 .5 0 0 0.000 1 .6 5 0 0.000 • Jr., Sr., & Open combined in all events VALUE OF Ci 6 .0 0 0 VALUE OF Ci 6 .5 0 0 • Entry Fee: $3.00 (Jr. - $2.00) each event STA ORD STA ORD EVENTS: 1. Rubber Power 0.000 0 .4 2 0 0.000 0 .4 5 5 2. Glider (164 ft. towline) 0 .3 0 0 0 .3 7 8 0 .3 2 5 0 .4 1 0 0 .6 0 0 0 .4 1 4 0 .6 5 0 0 .4 4 9 3. Scale — any power 0 .9 0 0 0 .5 0 4 0 .9 7 5 0 .5 4 6 1.200 0 .6 2 4 1 .3 0 0 0 .6 7 6 (20 sec. official) 1 .5 0 0 0 .7 2 6 1 .6 2 5 0 .7 8 7 1 .8 0 0 0 .8 2 8 1 .9 5 0 0 .8 9 7 4. Gas — 15 sec. eng. run, or 2 .4 0 0 0 .9 5 4 2 .6 0 0 1 .0 3 4 3 .0 0 0 1 .0 0 8 3 .2 5 0 1 .0 9 2 Electric — 25 sec. motor run 3 .6 0 0 0 .9 9 6 3 .9 0 0 1 .0 7 9 4 .2 0 0 0 .9 2 4 4 .5 5 0 1.001 • combined event · 4 .8 0 0 0 .7 9 8 5 .2 0 0 0 .8 6 5 5 .4 0 0 0 .6 0 0 5 .9 5 0 0 .6 5 0 In case of controversy, opinion of Contest Director and Judge 6.000 0 .3 0 0 6 .5 0 0 0 .3 2 5 0 .3 0 0 -0 .3 0 0 0 .3 2 5 - 0 .3 2 5 will be final. 0 .6 0 0 -0 .1 6 2 0 .6 5 0 - 0 .1 7 6 0 .9 0 0 0.000 0 .9 7 5 -0 .0 9 1 Chief CD Scale & Flight Judge 1.200 - 0 .0 3 6 1 .3 0 0 - 0 .0 3 9 1 .5 0 0 -0 .0 0 6 1 .6 2 5 - 0 .0 0 7 Carl Hatrak Bill Stroman 1 .8 0 0 0.000 1 .9 5 0 0.000 3825 W. 144 St. VALUE OF Ci 7 .0 0 0 VALUE OF C i 7 .5 0 0 Hawthorne, CA 90250 STA ORD STA ORD

i NOTE: Proxy entries encouraged. Send models to flier 0.000 0 .4 9 0 0.000 0 .5 2 5 of your choice, NOT to Model Builder or C D ’s. 0 .3 5 0 0 .4 4 1 0 .3 7 5 0 .4 7 3 0 .7 0 0 0 .4 8 3 0 .7 5 0 0 .5 1 8 1 .0 5 0 0 .5 8 8 1 .1 2 5 0 .6 3 0 1 .4 0 0 0 .7 2 8 1 .5 0 0 0 .7 8 0 1 .7 5 0 0 .8 4 7 1 .8 7 5 0 .9 0 8 and pivot." 1 .8 0 0 0 .4 9 8 2.100 0 .5 8 1 2.100 0 .9 6 6 2 .2 5 0 1 .0 3 5 2.100 0 .4 6 2 2 .4 5 0 0 .5 3 9 2 .8 0 0 1 .1 1 3 3 .0 0 0 1 .1 9 3 2 .4 0 0 0 .3 9 9 2 .8 0 0 0 .4 6 6 3 .5 0 0 1 .1 7 6 3 .7 5 0 1 .2 6 0 TABLE I 2 .7 0 0 0 .3 0 0 3 .1 5 0 0 .3 5 0 4 .5 0 0 1 .2 4 5 3 .0 0 0 0 .1 5 0 3 .5 0 0 0 .1 7 5 4 .2 0 0 1 .1 6 2 Profile Offsets 5 .2 5 0 1 .1 5 5 0 .1 5 0 -0 .1 5 0 0 .1 7 5 - 0 .1 7 5 4 .9 0 0 1 .0 7 8 6.000 0 .9 9 8 0 .3 0 0 -0 .0 8 1 0 .3 5 0 - 0 .0 9 5 5 .6 0 0 0 .9 3 1 C equals half diameter R 6 .7 5 0 0 .7 5 0 0 .4 5 0 -0 .0 4 2 0 .5 2 5 -0 .0 4 9 6 .3 0 0 0 .7 0 0 7 .5 0 0 0 .3 7 5 0 .6 0 0 -0 .0 1 8 0 .7 0 0 - 0.021 7 .0 0 0 0 .3 5 0 VALUE OF C t 3 .0 0 0 VALUE OF C i 3 .5 0 0 - 0 .3 7 5 0 .7 5 0 -0 .0 0 3 0 .8 7 5 - 0 .0 0 4 0 .3 5 0 - 0 .3 5 0 0 .3 7 5 0 .7 5 0 - 0 .2 0 3 0 .9 0 0 0.000 1 .0 5 0 0.000 0 .7 0 0 - 0 .1 8 9 STA ORD STA ORD 1 .0 5 0 - 0 .0 9 8 1 .1 2 5 - 0 .1 0 5 1 .4 0 0 - 0 .0 4 2 1 .5 0 0 - 0 .0 4 5 VALUE OF C: 4 .0 0 0 VALUE OF C: 4.500 0.000 0.210 0.000 0 .2 4 5 1 .7 5 0 - 0 .0 0 7 1 .8 7 5 - 0 .0 0 8 0 .1 5 0 0 .1 8 9 0 .1 7 5 0.221 2.100 0.000 2 .2 5 0 0.000 0 .3 0 0 0 .2 0 7 0 .3 5 0 0 .2 4 2 STA ORD STA ORD VALUE OF 0 .4 5 0 0 .2 5 2 0 .5 2 5 0 .2 9 4 VALUE OF C: 8 .0 0 0 Ct 8 .5 0 0 0 .6 0 0 0 .3 1 2 0 .7 0 0 0 .3 6 4 0.000 0 .2 8 0 0.000 0 .3 1 5 0 .7 5 0 0 .3 6 3 0 .8 7 5 0 .4 2 4 0.200 0 .2 5 2 0 .2 2 5 0 .2 8 4 STA ORD STA ORD 0 .9 0 0 0 .4 1 4 1 .0 5 0 0 .4 8 3 0 .4 0 0 0 .2 7 6 0 .4 5 0 0 .3 1 1 1.200 0 .4 7 7 1 .4 0 0 0 .5 5 7 0 .6 0 0 0 .3 3 6 0 .6 7 5 0 .3 7 8 0.000 0 .5 6 0 0.000 0 .5 9 5 1 .5 0 0 0 .5 0 4 1 .7 5 0 0 .5 8 8 0 .8 0 0 0 .4 1 6 0 .9 0 0 0 .4 6 8 0 .4 0 0 0 .5 0 4 0 .4 2 5 0 .5 3 6

68 MODEL BUILDER 0 .8 0 0 0 .5 5 2 0.850 0.5Θ7 1.200 0 .6 7 2 1.275 0.714 1 .6 0 0 0 .8 3 2 1.700 0.884 2.000 0 .9 6 8 2.125 1.029 ΙΜΙ-STARTER®» 2 .4 0 0 1 .1 0 4 2.550 1.173 CHARGER NOW HAS L.E.D. 3 .2 0 0 1 .2 7 2 3.400 1.352 Power for glow plugs that fits in a shirt pocket! 4 .0 0 0 1 .3 4 4 4.250 1.428 Fits any standard 1.5 volt glow plug. Stays on 4 .8 0 0 1 .3 2 8 5.100 1.411 plug, not in propeller! Locks onto plug using 5 .6 0 0 1 .2 3 2 5.950 1.309 6 .4 0 0 1 .0 6 4 6.800 1.131 Deadlock4'1 adapter. Rechargeable up to 1,000 7 .2 0 0 0 .8 0 0 7.650 0.850 times. Fits through cowlings. Charger and 8.000 0 .4 0 0 8.500 0.425 instructions included. 90 day guarantee plus 9 0 .4 0 0 -0 .4 0 0 0.425 -0.425 month extended service warranty. Bank cards 0 .8 0 0 -0 .2 1 6 0.850 -0.230 accepted. C.O.D.'s add $1.75 for 1.200 0.000 1.275 -0.119 1 .6 0 0 -0 .0 4 8 1.700 -0.051 shipping and handling. 2.000 -0 .0 0 8 2.125 -0.009 2 .4 0 0 0.000 2.550 0.000 $24.95

VALUE OF Ci 9 .0 0 0 VALUE OF Ci 9.500 See your dealer, or send this ad with order and get FREE SHIPPING! U.S. only.

STA ORD STA ORD 12206 Guinevere Road. Glenn Dale, MD 20769 (301) 464-2260 0.000 0 .6 3 0 0.000 0 .6 6 5 0 .4 5 0 0 .5 6 7 0 .4 7 5 0 .5 9 9 0 .9 0 0 0 .6 2 1 0 .9 5 0 0 . 6S6 1 .3 5 0 0 .7 5 6 1 .4 2 5 0 .7 9 8 1 .8 0 0 0 .9 3 6 1 .9 0 0 0 .9 8 8 cJIM ERQEKET REPblEAS 2 .2 5 0 1 .0 8 9 2 .3 7 5 1 .1 5 0 FAI RUBBER 2 .7 0 0 1 .2 4 2 2 .8 5 0 1 .3 1 1 SIZES: 1/4". 3/16". 1/8". 3/32". 1/16" 3 .6 0 0 1 .4 3 1 3 .8 0 0 1 .5 1 1 . 042 thick one pound box. 4 .5 0 0 1 .5 1 2 4 .7 5 0 1 .5 9 6 FUEL Price: $13.00 includes 4 oz. Slick Lube 5 .4 0 0 1 .4 9 4 5 .7 0 0 1 .5 7 7 BALLOON 6 .3 0 0 1 .3 8 6 6 .6 5 0 1 .4 6 3 Price: $12.00 no lube (Slick costs $1.751 7 .2 0 0 1 .1 9 7 7 .6 0 0 1 .2 6 4 Postpaid in US via UPS' Cal. add 6% tax 8.100 0 .9 0 0 8 .5 5 0 0 .9 5 0 9 .0 0 0 0 .4 5 0 9 .5 0 0 0 .4 7 5 65 F/F kits, incl. Starduster, Coupe deVille 0 .4 5 0 - 0 .4 5 0 0 .4 7 5 - 0 .4 7 5 FUEL PRESSURE FITTING four Satellites (now available), Dragmaster, 0 .9 0 0 -0 .2 4 3 0 .9 5 0 - 0 .2 5 7 Zingo FAI Power, Tilka Wakefield, P-Sffs, 1 .3 5 0 -0 .1 2 6 1 .4 2 5 - 0 .1 3 3 two pacifier tanks. Crocket hooks. Slick 1 .8 0 0 -0 .0 5 4 1 .9 0 0 - 0 .0 5 7 lube, Seelig & KSB timers. Front ends. 3 2 .2 5 0 -0 .0 0 9 2 .3 7 5 - 0.010 FREE FLIGHT prop kits, two kinds fuse, winders, all kinds 2 .7 0 0 0.000 2 .8 5 0 0.000 HARDWARE Si STUFF of hardware, books, and much more. VALUE OF C« 1 0 .0 0 0 VALUE OF Ci 1 0 .5 0 0 1985 catalog - 75«! Cal. add 6% tax. NEW CATALOG $ 2 for Post. & Hand. F. A .I. M odel Supply STA ORD STA ORD P .O .B o x 12600 Fresno,CA 93778 1 % PO BOX 3 9V TORRANCE CA 90510 0.000 0 .7 0 0 0.000 0 .7 3 5 0 .5 0 0 0 .6 3 0 0 .5 2 5 0 .6 6 2 VALUE OF C: 12.000 VALUE OF Ci 12.S0C 1.000 0 .6 9 0 1 .0 5 0 0 .7 2 5 1 .5 0 0 0 .8 4 0 1 .5 7 5 0 .8 8 2 STA ORD STA ORD 2.000 1 .0 4 0 2.100 1 .0 9 2 VINTAGE R-C FLANS 2 .5 0 0 1.210 2 .6 2 5 1 .2 7 1 0.000 0 .8 4 0 0.000 0 .8 7 5 3 .0 0 0 1 .3 8 0 3 .1 5 0 1 .4 4 9 0 .6 0 0 0 .7 5 6 0 .6 2 5 0 .7 8 8 4 .0 0 0 1 .5 9 0 4 .2 0 0 1 .6 7 0 1.200 0 .8 2 8 1 .2 5 0 0 .8 6 3 5 .0 0 0 1 .6 8 0 5 .2 5 0 1 .7 6 4 1 .8 0 0 1 .0 0 8 1 .8 7 5 1 .0 5 0 6.000 1 .6 6 0 6 .3 0 0 1 .7 4 3 2 .4 0 0 1 .2 4 8 2 .5 0 0 1 .3 0 0 CONSOLIDATED 7 .0 0 0 1 .5 4 0 7 .3 5 0 1 .6 1 7 3 .0 0 0 1 .4 5 2 3 .1 2 5 1 .5 1 3 PBY-5A "CATALINA” 1 .3 9 7 8.000 1 .3 3 0 8 .4 0 0 3 .6 0 0 1 .6 5 6 3 .7 5 0 1 .7 2 5 9 FT. WING SPAN 9 .0 0 0 1 .0 5 0 1.000 9 .4 5 0 4 .8 0 0 1 .9 0 8 5 .0 0 0 1 .9 8 8 ALL RIBS 8 FULL FORMERS SHOWN ON PLANS 11 10.000 0 .5 0 0 0 .5 2 5 1 0 .5 0 0 6.000 2 .0 1 6 6 .2 5 0 2.100 PLASTIC ENG.COWLS $ 1 0 -9 0 PR . 0 .5 0 0 -0 .5 0 0 0 .5 2 5 -0 .5 2 5 7 .2 0 0 1 .9 9 2 7 .5 0 0 2 .0 7 5 CLEAR GUN BLISTERS $ 7 .6 0 PR. 1.000 -0 .2 7 0 1 .0 5 0 - 0 .2 8 4 8 .4 0 0 1 .8 4 8 8 .7 5 0 1 .9 2 5 1 .5 0 0 0.000 1 .5 7 5 -0 .1 4 7 9 .6 0 0 1 .5 9 6 10.000 1 .6 6 3 4 LARGE PLAN SHEETS — P la n s $ 1 8 .9 5 2.000 -0 .0 6 0 2.100 - 0 .0 6 3 1 0 .8 0 0 1.200 1 1 .2 5 0 1 .2 5 0 6 f t . WING SPAN MODEL PBY-5A 2 .5 0 0 - 0.010 2 .6 2 5 - 0.011 12.000 0 .6 0 0 1 2 .5 0 0 0 .6 2 5 ENGINE COWLS $ 7 .5 0 PR. P | o n S $ 1 4 . 9 5 3 .0 0 0 0.000 3 .1 5 0 0.000 0 .6 0 0 -0 .6 0 0 0 .6 2 5 -0 .6 2 5 GUN BUSTERS $5.50 PR. ADD $ 3 QQ POSTAGE 1.200 -0 .3 2 4 1 .2 5 0 - 0 .3 3 8 CATALOG-OVER 50 PLANS^i 1.00 DEALERS WRITE VALUE OF Ci 11.000 VALUE OF C i 1 1 .5 0 0 1 .8 0 0 0.000 1 .8 7 5 -0 .1 7 5 2 .4 0 0 -0 .0 7 2 2 .5 0 0 - 0 .0 7 5 WORLD WIDE 3 .0 0 0 - 0.012 3 .1 2 5 -0 .0 1 3 STA ORD STA ORD 3 .6 0 0 0.000 3 .7 5 0 0.000 SID MORGAN 13157 ORMOND. BELLEVILLE. MICH.48III U.S.A. 0.000 0 .7 7 0 0.000 0 .8 0 5 0 .5 5 0 0 .6 9 3 0 .5 7 5 0 .7 2 5 Chickums assumed his "now, get this" 1.100 0 .7 5 9 1 .1 5 0 0 .7 9 4 look. "Here is where you can goof! You are 1 .6 5 0 0 .9 2 4 1 .7 2 5 0 .9 6 6 line in the proper place—which is the bot­ 2.200 1 .1 4 4 2 .3 0 0 1 .1 9 6 ready to mark the blank line. The part to be tom of the leading edge. In both Figure 2 2 .7 5 0 1 .3 3 1 2 .8 7 5 1 .3 9 2 removed is on the front side, which for a and Figure 3 the blank line is shown dotted 3 .3 0 0 1 .5 1 8 3 .4 5 0 1 .5 8 7 tractor, normal rotations; is under the pro­ because it is on the other side of the object 4 .4 0 0 1 .7 4 9 4 .6 0 0 1 .8 2 9 5 .5 0 0 1 .8 4 8 5 .7 5 0 1 .9 3 2 file just drawn. The backside is the un­ drawn. Don't screw up at this point, for 6 .6 0 0 1 .8 2 6 6 .9 0 0 1 .9 0 9 marked block side. From the backside lo­ most of the work has been done! The blank 7 .7 0 0 1 .6 9 4 8 .0 5 0 1 .7 7 1 cate the stations where you want the is ready to carve! 8 .8 0 0 1 .4 6 3 9 .2 0 0 1 .5 3 0 dimension A, and set it off. From the back­ "Hangar 3 has several nice Swedish carv­ 9 .9 0 0 1.100 1 0 .3 5 0 1 .1 5 0 11.000 0 .5 5 0 1 1 .5 0 0 0 .5 7 5 side at the tip, set off 2B. Connect these ing knives, and a good blade makes the job 0 .5 5 0 -0 .5 5 0 0 .5 7 5 -0 .5 7 5 points with straight lines and saw the block a lot easier. With long shaving strokes, re­ 1.100 -0 .2 9 7 1 .1 5 0 -0 .3 1 1 lines. Spot-glue the piece just sawed off move wood from the backside, working for 1 .6 5 0 -0 .1 5 4 1 .7 2 5 -0 .1 6 1 back into place, and saw out the profile. Re­ a flat backside from the trailing edge to the 2.200 -0 .0 6 6 2 .3 0 0 - 0 .0 6 9 2 .7 5 0 - 0.011 2 .8 7 5 - 0.012 move the spot-glued piece and draw the flat flat line leading edge. Leave a little material 3 .3 0 0 0.000 3 .4 5 0 0.000 line on the blank. Remember to draw this at the trailing edge for sanding later. Work

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 pacity (just over 3.6 cu. inches). It features self-contained CDI-ignition with only a MOVING TO SOUTHERN CALIFORNIA? very small flywheel, and comes complete with muffler, at 1.5 the price of the G38, MAKE SURE YOU GET A HOME which is not too bad. WITH A MODEL WORKSHOP ! ! I hope to be able to try one in the near fu­ FOR ALL YOUR REAL ESTATE NEEDS, ture; this one should enable my Big Bird to clim b straight up out of sight! · CONTACT: ANITA NORTHROP Dear Jake...... Continued from page 7

my scale Japanese Toni, it turned into an As­ Fashion Island tro Hog. Second, and probably more im­ portant, objects that you did not intend to Investments U | coat, but accidentally came into contact with the aerions due to spillage or over­ Newport Beach, California Phone (714) 645-8830 or 642-5062 spray could suffer disastrous side effects. As I write this, my daughter is sitting on a stepladder, practicing her lessons on our pi­ ano, which is floating near the ceiling. 2 CHANNEL PISTOL CRIP Aerions are a natural phenomenon, not WHEEL R/C 0Π 75 MHZ to be tampered with by man. Take a lesson from Icarus. Why do you think he flew too Easy handling for high close to the Sun? It was all those aerions he speed racers with 2 high pressed into his wax wings. torque servos Battery Jake box receiver and switch * * * Join collectors, restorers, replica builders, histo­ rians. and modellers all over the world in the only harness Dear lake: authoritative organization devoted to Those Mag­ .95 I've got a 72-inch Mosquito with twin Su­ nificent nying Machines. per Tigre 40s. It looks nice and it only Receive five Issues a year of WW1 AERO featuring all *69 weighs a little over 19 pounds, but it doesn't types of aircraft 1900-1919. each Issue containing [>rtq ΜΌ rMfWifV) histories, photographs, construction drawings, en­ (ly all that well and I've been trying to un­ gines. performance data, models, and lore written by experts Learn about projects all over the world load it. I put it up for sale in the club news­ Discover the most complete source for Information, letter, but no takers. It didn't go at the auc­ parts, models. Published regularly since 1961. 146 Bergen Ave. Jersev City N j 07504 tion either, so I hung it up in the local hobby SAMPLE ISSUE $4.00 Telephone I2011352 8100 Dept 27 shop to try and generate some interest. Still WORLD WAR 1 C e A > p & n * i- , IN C . T tS LIS 1 800 225 POIK »l055CtST no nibbles. Any idea how I can get rid o f it? IS Crescent Road. Poughkeepsie. NY 12601. USA For Sale in Fargo Dear For Sale: on both sides. Fair the hub area into the flat shouted, "Try a Moore!" and the stand The only way I know of to get rid of a six- line, but don't overdo it. You can take would close again. I think that was '39, '40, foot, twenty-pound Mosquito is with a fifty- material off later a lot easier than adding it! or '41. W.L. could be a nasty one at times! five gallon drum of Raid. "Turn the prop over and carve the front "Well, lads, let's send it off to Model Jake side. The block line w ill be the point of Builder—you did a good job!" I praised maximum camber, which should be about them. "By the way, which of the outrigger 1/3 the section chord. Working both blades canoe paddles were the best?" I carve WITH CARE until the prop 'looks questioned. R/C Soaring. . Continued from page 45 right.' Starting with about #100 aluminum "The little ones paddled best, Jefe, of oxide paper and a small sanding block, be­ course," said Chickums. "Sillie, Old Chum, Box 647, Mundelein, Illinois 60060. They gin the finishing—progressing to lighter let's toddle off to the Long Jump and see if will send you all the info you need to join, paper grades. Start checking balance when W illie has a new and cold Aussie Import in, along with the appropriate aspirant's form. you first start sanding. Be careful with the like she's been promisin'! See ya around, Rich wrote a short letter describing leading and trailing edges until you get to Jefe!" The lads went out into the bright sun. Terry's goal and return ship. I quote from it the lighter paper grades. Balance through­ See ya in the Chicken House, y'hear? · now: out the entire shaping of the blades—it's "Dear Bill; enclosed is a picture of Terry easier in the long run. Finish with several Luckenback w ith the plane that he finished with #400. Fine-balance with dope." Euro Scene. .. Continued from page 50 Level V with. I understand that he is number Chickums went over to the cooler. "That's 48. it!" he said over his shoulder, "You've drawn linton. The other day I received a friendly "The plane is a scratchbuilt of his own de­ it, you've carved it, go spin it!" letter from Mike, in which he told me that sign. The fuse is glassed I ight ply to the back This was quite an output for the lads! I he already tested this engine before he of the wing. From the wing back is glass couldn't help but think back to the SAGMA joined MB, but that he was working on a boom molded over a male plug. The fin is (San Antonio Gas Model Association) days report on the twin cylinder 3.6 cu. inch OPS wood over foam. The stab is 200 sq. in. and the props that Mr. Moore (was it Tom?) 60! He expected to finish the dyno-tests wood over foam, carbon fiber, Kevlar, glued carved. They were expensive, $1.00 for any w ithin a few weeks, so you won't have to with epoxy, and vacuum bagged. The stab diameter, but they were GOOD. We used wait too long to be informed about this very weighs 2 oz. and is fixed to the top of the fin them in contests and reworked .25 cent interesting European engine. with two bolts and uses a movable elevator Modelcraft props for funsies. I remember Certainly not European, but definitely of about 25% of the total. The wing was lent W.L. Vavricka (we called him W.L. and also very interesting is the Zenoah 62, the to him by Glenn Gold; it is 11 feet, about never wondered what the letters stood for) big brother of the successful Zenoah G38. 1200 sq. in., with a E214 airfoil. The plane took a bunch of Moore Props to the Nats It's being imported here now by Tony Clark, was flown at about an 18 oz/sq. ft. wing one year and tried them on the Flo-Torque and demand was such that I haven't been loading. Good lift, Rich Border. test stand in the manufacturer's booth. The able yet to lay my hands on one of them. "P.S. I really like the airfoil of the month. Moores were by far superior! The booth was Weight is said to be only 2200 grams (under How about printing some of the best airfoils shut down! When it reopened, the fans 5 lbs.), which is extremely light for the ca­ at about ten inches so we can copy them?

70 MODEL BUILDER Thanks." That's a good idea, Rich. Any interest out there guys? Your response may determine where you see the airfoils published. TOM GRESSMAN REPORTS: GREAT RACE GNOME & PRODIGY The "Hi-Performance Compact" I sure appreciate all the good info Tom RADIO CONTROL SAILPLANE Gressman sends my way from the Midwest 60” Wing Span region of our great country. If I were to give him a nickname, it would be easy, he's Mr. 375‘ " Wing Area Grapevine! From his listening post in Wis­ consin, Tom hears just about everything 12to 15oz. /2 c h R/C there is to hear in the world of R/C soaring. Optomized Eppler 205 Airfoil His latest communiques, a letter from early July and a phone call from early August, re­ S 3 4 . 9 5 Hand Launch·.»Slope- ·· High S tart/W inch vealed much info on two fronts. The Great Race X in or around Oswego, At your Dealer or add $2.00 per order^o r d e r i Illinois, on the weekend of June 21, was w m w * * r as®®aa «ea£R&irs for UPS Ca. Res quite an affair with high winds of around 15 P . O . B o x · 1 MIDWAY CITY, CA 32655 (714) Θ35-6563 add 6^ for Tax mph and high temperatures of around mid 90s. Larry Jolly and team won with Larry's from Tom. He had news from the 1986 F3H World Championship winning Comet AMA Nats. Paul Carlson had taken first in 2- WE SET THE PACE! X-country ship. When you're hot, you're Meter, second in Standard, and third in Un­ Michigan’s most complete supplier of hot! And there's no denying Larry is hot! His limited Classes!!! All with his little Prodigy model kits & accessories—if It’s winning distance was 33 miles of the 76 2-meter. featured in Model Builder Magazine kilometer course, a remarkable feat consid­ I called Paul to confirm, and it was all we probably carry it in stock. ering the fact that there seemed to be a true. The Prodigy's L/D was crucial in the We love to help beginners as well "ceiling" at approximately 3,000 feet which wind and heat (108 degrees!). There evi­ as the dyed-in-the-wool enthusiasts. no one could punch through. dently was an area downwind that was Give us a try! The accompanying photos tell a great generating some ridge or wave lift, and typi­ MEMBER deal of the story, so I'm going to close about cal "gas baggers" were unable to get back to Radio Control the Great Race 10. the field from it, not so the Prodigy. His per­ Hobby Trade Continuing with the "when you're hot, formance with his Prodigy earned him the Association you're hot" theme, Tom mentioned flying prestigious Lee Renaud Memorial Trophy 'HOBBY CENTERS the Off The Ground Models Prodigy 2- awarded to the flier who racks up the Meter sail plane at the Great Race. I too have 7845 Wyoming · Dearborn. Ml 48128 · 933-6567 highest total score in the three classes (B,C, 17900 E. 10 Milo Rd. · E. Detroit. Ml 48021 · 773-8294 flown a Prodigy, and like Tom think it is a and D). A remarkable feat, Paul, con­ 35203 Grind Rlvir · Farmington Ml 48024 · 477-6266 remarkable design. Quoting from Tom's gratulations! 105 $. Uvarnols · Rochottar. Ml 48063 · 651-8842 pre-AMA NATS letter: The first place winner in Class D (Un­ "Bill, in addition to the great Race data, I limited) and winner of the Hi Johnson want to pass on some information on a Memorial Trophy was Leon Kincaid who gratulations, Joe! Give somebody else a remarkable new design-kit. was flying a 3-Meter Scooter. Second place chance at the glory. "At the Great Race, I was fortunate to be in this class was Tom Brightbill and his NEXT MONTH. . . able to fly the Prodigy, twice. This sailplane Windsong. First place in Class C (100-inch, I've still got a bunch of stuff to share with has an incredible L/D, it changes speed Standard Class) was Jack Hamilton flying a you from the mail bag, some of it is well quickly and smoothly, and it has a very slicked-up Legionair-type sailplane called worth waiting for too, so be patient. I've got wide speed range. Even at low speeds, the the Skyjack. Beyond these, I don't know enough to fill another column yet, and I Selig S4061-096-84 section (see MB "R/C anything, and would refer you to official want to thank all of you guys who spend the Soaring." April 1986, page 43.) remains effi­ AMA press releases. time to drop me a line. I can't always answer cient. The airframe is capable of zooming JOE WURTZ, WEST COAST WINNER your letters right away, but I eventually get off a 12-volt cross country ship class winch. Joe Wurtz has one of the hottest winning caught up with everybody. "At the NSS contest in Madison, last streaks going out here on the West Coast. Thermals! Bill Forrey, 5815 E. La Palma - Saturday in June, Paul Carlson (OTGM He took first place at the SBSS International 281, Anaheim Hills, California 92807, founder and designer) took first place over­ Slope Races, first place at the Western (714)777-4514. all (2M and Unlimited Classes) with the 2- States Soaring Championships, and first Meter Prodigy. The larger Prodigy w ill be place at the Western Great Race hosted by available in about six months and probably the Thousand Oaks Soaring Society. Con- will allow for 100-inch or three-meter con­ struction (118 inches). "I did most of the timing for Paul, and he is a very good stick—but the Prodigy has it MAMMOTH SCALE PLANS all—it can be zoom launched hard— top CESSNA 180 -108" Wingspan BOEING F4B2 - 90" Wingspan L/D and still slow down to ride out that CURTISS P40D -102" Wingspan DOUGLAS 025C - 80" Wingspan light, small diameter thermal or now well- BERLINGER/JOYCE P-16 - (102.5") F/W FW56 'Stosser' · 103.5" Wingspan defined lift. I've also heard that one of these PAZMANY PL-4 -105" Wingspan WACO/YKS-6 · 99" Wingspan gems took first in 2M in Grand Rapids F/W FW44J Stleglitz' 89.5 Wingspan RYAN S-C - 112" Wingspan (number of entries in 2M? but about 70 con­ DOUGLAS A1H 'Skyraider' (120") T-28B - 102" Wingspan testants total). SHOESTRING · 95 wingspan STEVENS AKRON - 100" Wingspan "My suspicion is that this design w ill be­ F6F HELLCAT · 98" Wingspan WATERMAN ARROWBILE - 92 Wingspan come the one to beat in AMA/NSS thermal BERLINER/JOYCE OJ-2 -102" S an 8EBE JODEL D9 - 102" Wingspan Plans______are mailed by ______air; in a heavy-duty tube. P40, T28B, Skyraider, Hellcat, competition—I'll have one! Stevens Akro and OJ-2 are S33.00. Alt others are $24.00. Please add $5.00 for "Take care, Bill. I hope these photos postage and handling. California residents add 7% sales tax. Overseas orders add and/or observations are of value. Thomas $12.00 for air postage. M. Gressman." W ell, Tom's suspicions turned into MAMMOTH SCALE PLANS. 3351 Pruneridge Ave„ Santa Clara. CA 95051 · 408-244-5814 prophecy. A month later I got a phone call

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 71 Complete Fibreglass hull and superstructure ot this forty two inch Tug model with many optional parts including metal crew castings. For steam or electric power and R/C. Full sized detail plans and color photos available. We also build Fibreglass hulls for the 1/50th scale model of the Steamboat Delta Queen,a 1/96th scale C -2 Cargo Ship and two R/C sailing yachts, the East Coast twelve m eter & 50/80 0 AMY A class yachts. For full details, photos and prices, please send $2.00. 24 years of service to the model builder. Dwight H a rtm a n M ade in the HARTMAN FI B R E G L A S S R/C U S A BOX 86, DEPT. MB Since 1 9 6 2 233 M E L R O S E ST. THE CLASSIC HARBOR TUG 'DOUGLAS GREG" 21 7-79 5-2 275 ARGENTA. ILL. 62501

possible, practical layout of four-stroke Eliminates GLITCH problems associated with long servo leads. principles and having an almost irreducible number of parts, together with a sophisti­ Eliminates need for voltage robbing chokes and other devices with cated and highly effective rotary valve and leads over 15" long ^ head design. It is to the manufacturer's Modern CMOS 1C technology ' credit that despite pursuing this relatively Uses less than 0 5 milliamps at 4 8 volts lonely design course (with consequent re­ Power lines are capacitor tillered duced feedback from other manufacturers) STOP Available in 4 versions with connector installed. that the T4 works so successfully and practi­ S 10.95- Single Channel, single servo drive (Single) GS-1 cally at a quite wide range of rpm. Mechan­ $12 95- Single Channel, two servo drive (Wyel GS-1 Y ically, this simple layout would appear to S14 95- Two Channel, two independent servo drive (Twin) GS-2 offer considerable reliability and a mini­ EMS S17.95- Two Channel, two servos per channel drive (Twin Wye) GS-2Y mum of operational problems to the user. In IttCTttOMC MO Of i W fM S • Overall lead length is approximately 6" to 8 practice during this test, the T4/80 was a • Modeler must furnish own longer extensions as required ___ flexible performer, durable, and easy to Soecifv Radio S1 00 Shipping and Handling on Pre-Paid orders, add operate. · μ y 6% for California residents. Mastercharge and Visa. 6175 PALO ALTO DR.. ANAHEIM, CALIF. 92807 (714) 637-2161 Fan-Fly...... Continued from page 31

it is not a jet project, the 8-29 captured the attention of everyone at the Fan-Fly, and it A T LAST... served to illustrate Byron's dedication to en­ A Free Flight Model gineer, produce, and demonstrate the outer Retrieval System that limits of the scale modeler's art. In a similar works . . . EVERY TIME vein, the plug of a B-1 fuselage was on dis­ play. Maybe next year we w ill be treated to FLYER « 2.00 Kit $10.93 Plan Only «3.10 An ultra light weight, long range RUBBER POWER ~ " ^ • O W L I n’TSr^ " the sight of a huge four-engined jet bomber PEANUT 8CAL. C! *” BOARDWALK B miniature transmitter combined with a highly sensitive receiver and directional with variable geometry wings. FLY1NO MODELS |J Ca”'"o f* ' The BD-5J theme of the Fan-Fly was rein­ $2.00 for U.S. Delivery. CA Res. Add 6 % antenna will quickly help you track and locate your plane. forced each afternoon when Dave Hoover K it $10.93 lit off the Microturbo in his full-sized ")" NEVER LOSE ANOTHER MODEL! and taxied out to take the active at Ida $ 3 . 0 0 Send SASE For Brochure Grove International. Dave's cockpit micro­ phone was transmitted to the announcer's RACER Jim Walston R etrieval Systems stand at the Fan-Fly site so that all remarks K it $7.95 725 Cooper Lake Rd. S.E. from the cockpit were heard by the crowd. $ 3 . 0 0 Smyrna. GA 30080 This was a particularly interesting touch, 404/434-4905 since Dave is a very glib individual and does an amusing job of describing his air- show routine as he is flying the maneuvers. ones, and so to prevent visual confusion, The routine is very precise, and Dave made the silencer figures have been omitted from excellent use of the Iowa terrain by follow­ Inside Engines. Continued from page 34 the power graph. At rpm about 11,000, secu­ ing the hills at very low altitude, appearing rity of the silencer fitting was marginal, and in front of the crowd unexpectedly. this writer. continual retightening proved necessary. The BD-5J demonstration was followed SILENCER OPERATION IDLING SPEEDS by an expanded version of the now famous Subsequent rerun of the above tests, but The TN carburetor allowed the following WWII air battle reenactment, "Striking with the standard Webra silencer fitted, re­ idling speeds with good transition to mid­ Back." This display has achieved worldwide sulted in a small average loss of 200 rpm at range rpm and above: recognition. Many non-modelers have each point and small reduction in maxi­ Graupner 12.5 x 7 (3-bl) - 2,300 rpm been made aware of the sophistication of mum hp down to .91 at 10,200 rpm. Graupner 15 x 8 - 2,200 rpm our hobby through this demonstration. The Equally, fuel consumption was slightly re­ Mastro (OPS) 18 x 7 - 900 rpm display is so realistic that several movie pro­ duced. In many cases the various figures SUMMARY duction companies have expressed interest proved too similar to the open exhaust The Webra T4/80 combines the simplest in using the Byron's aircraft and pyrotech-

72 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ROAR 1:10 NATIONAL CHAMPION ORRCA NATIONAL CHAMPION

IM PO R T FIG H TER .

THE TEAM DOES IT IN THE DIRT. oil-filled racing shocks. These custom Race the car that beat the shocks use machined alloy cylinders and imports in the toughest kind of drill blank shafts for silky smooth action. off-road competition Rugged, yet light, the suspension gives The All-Americon Associated you all the adjustability of full size, full race RC10 took home the gold in buggies The A-orm/Boll joint design allows both the ROAR and ORRCA precise camber, coster, ride height and National Championships spring rate tuning Even anti-roll bars Our RC10 turned bock the and a VoriLok dif ore included. foreign cor invasion with the Exceptional ground clearance and same racecor technology that low center of gravity also contribute has kept Teom Associated on to the superb balance and perfor­ top of the RC cor racing world mance of the RC 10 over oil types for over 15 years of terrain. T6 aircraft A RACE CAR, NOT A TOY. oluminum GET THE JUMP ON THE COMPETITION. Sure, you've heard that before monocoque tub Go RC off-rood racing with the But Team Associated designs leaders The National Champion and engineers only model RACE cars Front RC10 is available now and legal for The new RC 10 features fully adjustable, four Fully c ROAR ond ORRCA nationally sanc­ 4 whee l skid plate wheel independent suspension, an oluminum Independent tioned competition alloy monocoque tub and race-proven hardware suspension Complete RC10 kits, replacement throughout. parts and spares ore readily available through And the RC10 doesn't need expensive model cor racing's most extensive dealer accessories and modifications to handle the network. roughest frocks. The strength and durability is Take the challenge ond build yourself a winner. stondord equipment. Team Associated's RC10. Sealed gearbox VorILok RACE-WINNING ENGINEERING. differential For maximum traction the RC 10 suspension Smooth undercarriage moxlmum ground clearance is damped by long throw.

Model cars lor Real racers. Full race rear suspension Includes bullet proof halt shall ond u-Jolnls with tapered and Associoted Electrics keyed modular wheels. Quick release knock 1928 East Edmger o il design tor last pit work ond tuning. Santa Ana, CA 92705 (714) 547-4986 © 1984 Associated Electrics No plane is complete w ithout its pilot! your newest (or oldest) plane kit to the But then again you don't want just any limits! "run-of-the-mill" pilot at the stick of your Made of Latex rubber, accepts any pride and joy. type of model paint, 1/6 scale head d i­ Use our good ol' "Cap'n Eddy", now ameter: approx. 1 5 /8 " , 1/4 scale head available in both 1/6 Scale and 1/4 Scale diameter: approx. 2". sizes.-.painted or unpainted! He's an ex­ perienced fighter pilot from WWI, earning 60K63-Ace 1/6 Scale Pilot...... $4.98 more medals than any other pilot in that 60K63P-Ace 1/6 Scale Pilot, painted era (unfortunately, all records of his feats ...... $9.95 were captured by German high command and destroyed.). 60K64-Ace 1/4 Scale Pilot...... $7.49 He's still active as the official test pilot 60K64P-Ace 1/4 Scale Pilot, painted for ACE R /C and he can help you take ...... $12.49

COMES PAINTED OR UNPAINTED Available at your local dealer! f you must order direct add $2.00 for Postage and Handling. For a complete catalog send $2 .0 0 to the following address... ACE R/C 116 W. 19th St.. P.O.Box 511DN, Higginsville, MO Zip Code 64037 Telephone (816) 584-7121

Don Hughes and I have been writing teriorate with heat. back and forth a lot lately, his planes have Don also talked about magnets, a new been featured in earlier columns. Don is type of magnet is the neodymium magnet. one of those rare types that can clearly see Popular Science, in the August 1986 issue the logical and simple answer to a problem. talked about these magnets in motors de­ After he tells you, you say, "O f course, why signed for a hybrid gas-electric car. There didn't I think of that!" Anyway, the subject they are used in an eight-pound motor that this time was the ferrite motors and the loss produces 20 horsepower. This is double the PEANUT SCALE $7.95„ of magnetic field over time. When these power possible w ith samarium cobalt mag­ Caudron Fokker D 7 Post Biplane motors are driven hard or stalled out and nets ("cobalt motors"). An eight-pound mo­ 24 SCALE MODELS $9.95, get hot, they lose some of their magnetic tor capable of 20 horses is fascinating, it field, and this continues till the motor is would make full-scale electric ultralight Sopwith Dolphin D.H. Pussmoth really only 70% or so of its former self. This planes quite practical, even w ith the nickel 1917 Standard gets very frustrating, especially when you cadmium batteries of today. SENDSASE FOR BROCHURE try to prove it is something else causing the Don may try some of these super mag­ SIERRA NEVADA MODELS lack of power. nets, but in the meanwhile he has been do­ P.O. Box 6195 Incline Village So, now for Don's idea: these permanent ing some neat stuff with the ferrite 035. One NV. 89450 magnet motors also act as generators. So, of the big problems with the present ferrite spin the motor at some fixed rpm, and mea­ motors (and some cobalt motors too!) is the sure the voltage at the motor leads (the mo­ brush/commutator system. They are too nics for future film sequences. tor is disconnected from any battery pack). small, and they "choke" the motor. Don lets I understand that the Fan-Fly and the Gi­ Do this when the motor is new, and periodi­ the motor breathe by installing larger com­ ant Scale events may be merged into one, cally as it ages. Don did not say, but I think mutators and brushes. These modified mo­ week long program next year. This sounds the voltage w ill go down as the magnets get tors really scream; he turns them at up to like an excellent idea since it will allow bad. You will probably need a digital volt­ 22,000. It is bound to come! Move over, more modelers to attend both events. · meter for this, or an ESV. I have not tried this hopped-up Tee Dees! The motor and his yet, but I w ill and let you know of the re­ custom gear drive weigh four ounces and Electric Power. Continued from page 17 sults. I think a common 1/4 or 3/8 shop drill run on eight 450 cells. This turns a Top w ill provide a handy source of constant Flight 9 x 6 cut to 8-1/2 x 6 nylon prop at all hope it comes back! rpm. By the way, cobalt magnets do not de­ 7,300 on a 13-39 gear drive. But then the next question that Don posed! Is it progress when you finally overpower your model Lim ited Supply and cause it to crash? It happened at Fresno, Don plane went into a loop, shattered the Tuned Pipe with Header wings, and stuffed into the ground. Speed FITS: O.S. Max .40-,45 FSR IT i f r kills! Thanks for the info, Don, and with Thunder Tiger. Royal .40-.45 that, let's go out and electric fly, fly, fly! · KJ /V L Y HP .40. K&B .40. HGK .40-.45

$ 2 4 . F/F Scale.... C ontinued from page 62 Includes: Tuned Pipe with Silencer, Header, properly in order to get the proper contour, Silicone Joint Tube, Mounting and yet be able to trim it neatly and pre­ Please Add $2.00 Postage and Handling per order. Strop and Screws, and Clamping cisely. Whatever you do, don't do it as illus­ Californio residents add soles tox. Wire for silicone tube. trated, because your efforts will look just awful! To avoid this, do the following: The RJL Industries, Inc.® bottom of the fuselage should be covered first, followed by the sides, then the top. The 1831 Business Center Drive Duarte, CA 91010 (818) 359-0016 reason is simply to have all the seams down-

74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOUI MODEL BUILDER ward rather than the other way around. The same technique is used on full-size aircraft. Once the bottom has been attached and WILSHIRE is the One Place for Sailplanes in the U.S... trimmed, cut a piece of Solartex to be used foreign and domestic in stock from $29 to $1200 . . . and, if you're for one of the sides. Leave enough width at into Electric Flight, WILSHIRE carries the most complete line the bottom that can be used to hold the anywhere in North America, write for our Catalogs . .. material while pulling around the bottom corner. Attach along the top edge and at SAILPLANE CATALOG ... $2.50 either end. Before attaching the bottom ELECTRIC FLIGHT CATALOG ... $2.50 side, take a piece of duct tape the length of Catalogs are updated continuously . . . more items, all with photos. the side, and tear it so it is about a half-inch wide. (Duct tape tears very easily.) Lay the Get the latest, with “Shirley” the cat, on the cover! tape on the bottom edge as shown in Fig. 1. Next, take the extra material along the bot­ tom, and pull it around the bottom corner. w U shire m odel center At this point, apply heat on just the corner RC Sailplane and Electric Power specialists for the U.S. A. itself, and nowhere else! Fold the extra Stop in and see our new store at 2836 Santa Monica Blvd. material around the bottom and tape it m m m Santa Monica, CA 90404 (213) 828-9362 down. You w ill be cutting over the duct tape. At this point, you may be asking why duct tape? Any tape will do providing it is you'll obviously need to put down two thick enough so that you will not cut pieces of tape, but handle as before. If you through the fabric underneath. You can have been doping the first coat as you go SC-4 ELECTRIC probably use masking tape, but care has to along, take a piece of Scotchbrite pad, and be taken. Possibly two layers of masking SPEEDCONTROL go over the whole model, particularly tape would be better. . . but I had a roll of NFW (or 1986! FULL RANGE throllle along the seams before doping again. If you duct tape on hand! for ALL 0 i lo 40 si/e motor»,. New haven't been doping before, do so now and There's a trick to putting down the edge design uses optical isolation. Range use the pad between coats. It removes any just trimmed. Never hold the iron so that it and neutral adjustable lo match anv fuzzies that might show up without tearing is over the unsealed edge. The fabric could radio. Voltage regulator, on-board into the tissue. shrink and pull away from the structure be­ protection diode, and motor OFF failsafe (or reliable operation. 4 fore the edge was completely sealed. So, * * * VIOSFFT transistors provide on' hold the fuselage with the bottom facing At a recent Flightmasters meeting, Mac resistance BELOW .01 "> ohm for .IS you, and run the iron in downward strokes Macjunkin showed up with an interesting volt loss at 10 amps. Can handle over along the seam until it is completely sealed. test bed. He had made a model of the XP59 40 amps continuous. ... The rest of the fuselage is done similarly. for rubber power. It is a combination S ir Using this technique gives the seams nice, jet/prop airplane. Before he did any test fly­ JOMAR PRODUCTS straight edges. ing, he made a quickie of the same airplane 2028 KNIGHTSBRIDGE DRIVE Getting back to the tissue issue! One of out of foam exactly the same size as the CINCINNATI, OHIO 45244 the major reasons I do not build many built-up model. He made the tail plane ad­ WWII rubber models is that the covering of justable, and what was really clever, he 513-474-0985 the fuselages is such a pain. They usually used a nail poked into the top of the model have to be covered in individual strips be­ for ballast. Naturally, he was able to move blood pressure goes out of sight! tween stringers. Sometime back, I devel­ the nail fore and aft until he got ihe best I'm off to Geneseo...!!! oped a method which has minimized the glide, along with tail adjustments. Once agony and time consumption associated Mac established this good information, it Free F lig h t . , Continued from page 61 with these type of models. As stated before, was transferred to the built-up model. This, start at the bottom and work up. I like to put in turn, made testing the more fragile my strips of tissue on moist. This virtually model an easy task. By the way, normal bunt timing sequence eliminates getting any wrinkles in the cov­ In closing this month's column, I want to is as follows: Engine flood off at 6.9 sec­ ering. I also like to use thinned out white thank those of you who take time to write. onds, bunt actuates at 7.5 seconds, auto­ glue for attachment. (60% glue to 40% Many of you want specific information. If rudder actuates at 7.5 to 8.0 seconds, glide water.) you do not enclose a self-addressed enve­ actuates (and bunt de-actuates) at 9.0 to 10.0 Putting on the first strip is a breeze! When lope, the chances of a reply are slim or seconds, d.t. actuates at 3.0 minutes. Some dry, trim and apply a coat of 50/50 nitrate none. I hate going to the post office for any folks actuate the bunt and the auto-rudder dope and thinner. If you prefer not to dope reason, and when I am forced to do so, my at the same time using the same lever on the at this stage, don't worry about it. After cut- ti ng out the next strip of tissue, lay a piece of ”RU)C FUSELAGES’ low-tack masking tape right down the cen­ ter of the stringer which the strip of tissue • l/5th scale H-S00C/0 • l/8th scale Bell w ill attach to. This can be a bit tricky since For .60 size mechanics. ω/retracts For .60 size most stringers are only 1/16-inch square. mechanics.. Brush a coat of the glue onto the stringer * "Baby Egg" 1/7.5 scale with the tape on it and to the adjacent one. H-S00C for the "Shuttle" SLING WING ACCESSORIES” Again, apply the moistened strip of tissue • fins, brackets, & goodies onto the glued surface and pull taut in all For R/C helicopters ...... directions. When this strip has dried, take your sharp razor blade, and cut right along the edge of the tape. The tape acts as a ‘ R o t a r y guide, making trimming a snap! Pull the tape back on itself when removing. This c W i n g truly simplifies a rather tedious task. Keep in mind as you go up the sides to alternate C oncepts, in c. left and right. You don't want to take a (513) 866-610H 1201-0 ALEX R D . W. CARROLLTON, OH 45449 chance on distorting your fuselage. dealer inquiries Invited When you get to the last strip of tissue,

NOVEMBER 1986 75 work, and VIOLA! You have a jig that has enough flexibility so that you can skew it for NEW ..WURMOWPRODUCfsW wash-out or wash-in, but sturdy enough to FOURMOST RECOIL TUBING serve as a foundation for your next under­ A four foot length of super-tough fuel-proof camber project. Now, use it just like you urethane tubing pre-formed into a FOUR-INCH would any other undercamber jig." (see COIL. It allows placement of your field box and sketch). can a convenient distance from your aircraft or boat. After use the tubing will retract to its NEW KIT MANUFACTURER-SIERRA r earlier space-saving form. NEVADA MODELS Price:$3.95 Recently, I received a very nice kit from Sierra Nevada Models, P.O. Box 6195, In­ cline Village, Nevada 89450. The kit was the scale model D.H. Puss Moth, a 24-inch rubber-powered ship. The kit featured selected printwood, stripwood cut to size F U E L L I N E and length, W illiams Brothers wheels, plas­ tic prop, tissue, rubber motor, and a two- PIPING PRO BLEM ? page set of plans complete with building in­ structions. Other models in the series in­ WE HAVE THE clude two other 24-inch scale ships—the Sopwith Dolphin and the Standard—all at '· f i t t i n g " $11.95 postpaid. Three peanut scale kits are SOLUTION also available, a Caudron, The Wiley Post, and a Fokker D-VII. You should be inter­ Six·: ,3/32 I D Price: *2.00 LARGE OR sm all Size: 1/16 I D. Price: *1.50 ested in these quality products. Try them 1 Tee. 1 Elbow. 1 Union. 1 Plug 1 Tee. 2 Elbows. I Pen Bladder Tee out. 4040 24th Ave., Forest Grove, OR 97116 FOUBMOST PBOOt/CTS Telephone: 1503) 357-2732 SOME WORDS OF WISDOM IN CLOSING How to estimate your salary: To estimate your salary from your hourly wage, double the wage and change the decimal point to a comma. Thus, $3.00 per hour becomes $6,000 per year. This figure is about 4% RUBBER POWERED FLYING MODELS low, but with taxes the way they are, it KITS · PLANS · ACCESSORIES doesn't make much difference. KITS - TISSUE - LUBE - PROPELLERS j Estimating the temperature: Count the number of times a lone cricket chirps in SHAFTS - BEARINGS - WHEELS fifteen seconds and add thirty-seven. This LARGE CATALOG OF QUALITY SUPPLIES. gives the temperature in Fahrenheit. (Now, KITS AND PLANS FOR RUBBER POWERED where is a cricket when you need one?) MODELS. ALSO CO-2 ENGINES, BLIMPS, Selling things door to door: After knock­ ELECTRIC AND MORE. ing, stand at least four feet back from the FUU CATALOG $2.00 door. NEW NO. (619) 446-1818 Playing Poker: Don't enter a poker game Peck-Polymers unless you have sixty times the betting lim it in your pocket, when you have doubled this BOX 2498-MB LA MESA. CA 92041 amount, quit! So, with these words of wisdom in mind. I'll quit too! · seelig timer, others use a modified Seelig 5 to 1/4-inch hard balsa and cut ribs whose function timer which is available from tops are the same as the undercamber of the Doug Galbreath for $28.50. Doug's address ribs that the wings w ill have. Make enough Tunnel Boat. . Continued from page 49 is 707 2nd Street, Davis, California 95616. ribs to cover the wingspan, spaced at about BUILDING TIP-FROM THE BUGS 3-inch intervals. Now take some more 1/4- Hobby Poxy Formula II that has been BUZZ NEWSLETTER inch to 1/2-inch strips long enough to make heated w ith a heat gun. When heated, the "John Bonang developed an undercam­ the longest wing panel that you intend to Formula II becomes easy to brush. This not ber jig for wing building; this jig was very build—attach the strips to the ribs at about only seals the boat, it also strengthens the simple in construction: Take some 1/8-inch 1-inch intervals. This w ill form a lattice hull.

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FOX .36 BB DELUX ...... A super performer for the beginner or sport flyer. Combines excellent fuel economy with maximum durability Todays descriminating modelers and crash resistance to provide a fine want the very best in an R/C motor. motor for sport and trainer models. The best performance, the best ATTENTION BEGINNERS... value, and the best service. Whether Every FOX R.'C motor is test run FOX .40 BB DELUX ...... you are a beginner, a seasoned sport at the factory and the carburetor needles For the demanding flyer who wants flyer, or the toughest competition are set for normal R/C fuel. You can more power for the ultimate flying pilot, you want more from your motor take your motor out of the box, bolt experience. This is one of the than ever before...and we think that it in your airplane and fly without lightest .40’s on the market and with our new DELUX series of motors any major adjustments to make. itfs reduced case size it w ill fit into has the power you need to fly with As far as we know, no other R.'C any .40 size model on the market. th e be st. motor is tested and adjusted in this manner. ONLY $ 99.95 each

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Through proper preparation, it is possible Darker colors are then sprayed on the turned in some fairly fast heat times, com­ to achieve a glass-smooth finish on a model. The 11cc boat I ran in 1985 was ing withing six seconds of Ed Fisher's wooden hull. The key to a smooth finish on painted like the "O'Crady's" tunnel raced NAMBA record 1:28 for the .9 mile oval. a wooden hull is filling the grain. Before by Bob Herring during the 1984 Formula I I have found the Octura X457 works very getting to filling the grain, let's consider fill­ V-8 tunnel series. That boat did look as nice well when the weather is cool. On very hot ing gaps and seams. As mentioned earlier, I as a scale model. The 11cc Tunnel would days or at higher elevations, the X455 seems like to use automotive fillers. These prod­ certainly lend itself well to many scale tun­ to do better. There's no way this boat can be ucts are readily available and are often nel boats. When it comes to painting, the trimmed effectively without the use of a cheaper than model products sold for the limits are set by the painter. motor mount like the Prather or Teague 7.5 same purpose. Automotive fillers set RUNNING AND RACING THE outboard motor mount. I have placed an 8- quickly and work easily. lice TUNNEL ounce fishing sinker in the very front of the After the hull has been filled and sanded, I have had the opportunity to test and race front cowl. This helps to keep the bow I recommend a couple of coats of K&B Su­ my 11cc Tunnel for half of the 1986 season down and improves the cornering. per Poxy Clear Paint be applied. Thin the and feel it is very competitive with other The 11cc Tunnel w ill corner w ithout the clear about 25% so it penetrates the wood. hulls. I haven't been able to beat Ed Fisher aid of a turnfin. It will also turn to the left After the coatings of clear, apply a heavy and his Geraghty Tunnel, but then not too without tripping like many tunnels with coat of K&B Super Poxy Primer. Don't worry many others have done that either. I have turnfins tend to do. Although I haven't yet about runs, as this paint sands very easily. After this first primer coat, it is easy to see any areas that need additional filler. Fill any cracks and then sand. Another coat of primer is now applied and sanded. The 49 Scott Street wood grain on the hull should now be Riverside. NJ 08075 filled. If it looks like another coating of (609) 764-8256 Sitar Blades the best blades primer is needed, shoot it. ever produced Call for info If these preparation steps are followed, Specializing in the hull should be ready for final painting. I am not one to spend great amounts of time R.C. Helicopters doing "trick" paint jobs on my race boats. Schluter - Heim - GMP - Sitar My 11cc Tunnel is painted with K&B Super Poxy white and then trimmed with decals, rub-on letters, and numbers. Clear paint is J.R. Radios and Accessories Store Hours Need Technical Help? sprayed over the rub-on letters. Full Assembly & Tues-Wed.. 9-6 We have the most Repair Services Thurs.-Fri.. 9-9 experienced & When spraying more than one color on a Sat. 9-3 knowledgeable people model, I find it works best to spray the entire Closed Sun.-Mon. in the field. model with a base coat of the lightest color.

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 77

pipe length. However, in my case, the en­ INDOOR MODEL SUPPLY gine was already in my Shuttle and I had no way to tach it. I started an inch longer than Don's recommended length, and ran it. I didn't sense any substantial rpm increase, so I cut the header one-half inch. It seemed to pick up, so I went another half-inch. I also M.»5 (I 15.95 *5 95 took a little pitch off the top end, bringing it THE SLOWPOKE Span 16 2 Yard Bird· Plastic down to 7-1/2 degrees, and adjusted the ,6.9» Prop pitch curve so I had very little change in 12" Spi pitch from% to full throttle. This was just the ticket! The engine came onto the pipe *5 9 5 ' and really started to sing. That Shuttle really Th· Novice Penny Ptene tears now, and it pulls through those loops with power to spare. The extra weight hang­ ing behind the CC allowed me to put a

1200 mah battery up front without disturb­ Span IB $6 95 ing the balance. It also fits neatly inside the Shuttle Jet Ranger fuselage made by Great TOP FLYING MODELS •FLAPPING FLYER” IN AND OUTDOOR Lakes. At this point you w ill have to deter­ RUBBER POWER Ϊ4* $p«* 1/· o z need it! mine if it's worth the money. We know that P-NUT CO-2 ENGINE Φ · * Drilled Nose Bi the last 10% of performance takes 90% of Formed L. Gear the time and 90% of the money. If you need I will be manning the Model Builder AAA Light Sheet booth at the Chicago Model and Hobby eI AAA S trip W ood j a different muffler for a scale fuselage, this Japanese Tissue 1 Fascinating 1 Hardware & Prop may be just the ticket, and the fact that it can Show October 10-12. This has become one 2 Minute Flights be moved around somewhat gives you of the best shows in the country in one year. 22” KORDA EMBRYO 20” DAPHNE some flexibility in installation. Remember Catch it if you can. · *1 that extra power in a helicopter helps pre­ I vent crashes—that is its primary purpose. P e a n u t...... Continued from page 53 You don't have to feel that you're a "hot rod" when you soup up that engine. Call or write Don Chapman Design Corp., 6223 Taylors- and wire, with ,5mm paper covering to 13- SCALE AIRCRAFT KITS simulate the gear. eI OUTSTANDING DETAILS. 3-VIEWS A HISTORY ville Road, Dayton, Ohio 45424, NOSE BLOCK AERONCA K 1937 (513)236-8853. ALCO SPORT 1929 WATERMAN RACER 1921 NOSE-IN HOVERING This part is made from light balsa, with ZIPPY SPORT A.R.V. HEATH PARASOL 1928 the radial bearing from 1mm plywood. ea. $6.95 A new flier came up to me once and said 272 pgs RON WILLIAMS BOOK ON he had learned to hover successfully, and Prop shaft must go 3 degrees down, and I300 illuet. INDOOR MODEL AIRPLANES.. . . $14.95 was now trying to learn nose-in hovering, 1 degree to the right for proper flight. INDOOR BALSA PACK $6.95 P-NUT PACK $6.95 COVERING JAPANESE TISSUE 10 Ige 5 col roll $6.95 and having a terrible time of it. I gently told CONDENSER PAPER 2/S3.25 MICROLfTE $3.25 him that nose-in hovering was not step two Modelspan or thin Japanese tissue is RUBBER LUBE $195 BALSA CEMENT $195 best for this model. I used white model- THRUST BEARINGS. Mini Dual or Dual $1.00 in the learning process. He could first go on eIRUBBER 025 to 090. 005 me 4-1/8 & 3/16 $2.65 to forward flight, loops, rolls, autorotation span, and colored it with blue as on the 8:1 WINDER $3.95 18:1 MARK 1 $11.95 —and then tackle nose-in hovering. This is original craft. The color scheme on the fi­ P-NUT CO-2 ENGINE $34.95 CHARGER $11.95 nal version of the R-7 was red, white, and ADD 10% POSTAGE-MINIMUM POSTAGE $1.50 not to minimize the importance of this CATALOG 18 ILLUST. PGS. $1.50 technique. It is basic to all the FAI and AMA blue stripes with black trim in front of the I hovering maneuvers. However, it is much canopy. The wing was blue on top, and BOX C, GARBERVILLE, CA 95440 more difficult to do than simply flying a red on bottom. Other color schemes in­ helicopter towards yourself. It is balancing cluded all white, with green on cowl, dur­ 1800, when the rubber was new. You must the helicopter in reverse-almost like learn­ ing its initial testing at the Brno-Slatina air­ find the best rubber and prop pitch you ing to hover all over again. Here's how you field. When Mr. Souc was training in the can for contest flying. do it: R-7 for the Magneburg Championships, FLYING (1) Trim and balance your helicopter. If it's the colors were all-yellow, with cowl in The Racek is an excellent flyer. It doesn't nose heavy, or if you have a lot of forward red, the prop silver with red edges and have any problems when all is in accor­ trim to help you in forward flight, these w ill blue spinner. dance with the plan. Look at the down- work against you because the helicopter RUBBER thrust, rudder, c.g., etc. once more before w ill want to come in toward you and you I used my best orange Pirelli rubber, you test fly to be sure everything is proper. w ill have to keep pushing it away with back weighing 1.2 grams. Maximum turns were The best contest flights I obtained were cyclic. (2) To get started, fly around in a circuit and bring it in toward you as if you're going to land, nose into the wind. When the Gemini M.T.S. (A superior Multiple Task Sa ilp la n e ) helicopter is still about 30 to 40 feet away, and 15 to 20 feet high, apply back cyclic Standard Class R/C sailplane for and reduce the throttle slightly to bring it sport, F3B, and AMA contests into a hover. Now it's just a matter of keep­ ing it in a hover. All your controls are Specifications: reversed except throttle and collective. Wingspan 100 in. COMPLETE KIT W ITH Keeping it high enough and far enough Wing area 930 sq. in. PRECISION CUT PARTS. Flying weigh r 44 or. ALL HARDWARE, AND gives you more margin for error. If you get Wing loading 6.8 or. /sq. f t FULL-SIZE PLANS confused or disoriented just give it full Wing section MB-253515 power and forward cyclic to get it flying, 115% semi -symmetrical) $99§5 and turn it sharply to get it heading away Max. ballast 4 lbs. from you. The hardest part for me was in continually giving it back cyclic to keep it Pierce Aero Co. away from myself. Be sure and give yourself 9626 Jellico Avenue, Northridge, CA 91325 Phone (213) 349-4758 plenty of empty space to practice. You'll

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 but a low static score held her to tenth “AWE-FUN” place. Jeff Perez was the high U.S. finisher, ending up in seventh place w ith his B-17. Jeff CONGRATULATIONS had a very high flight score, but a low static 1985 NAT’S WINNERS kept him out of the top places. Ron Sears was prepared to take his new C-123 "Pro­ Rich Irvine, 1st, Masters vider" when only one week before we were David Snow, 1st, Sportsman ready to leave, he crashed it during a prac­ Chip Hyde, 2nd, FAI tice session. Ron ended up competing with Pete Callas, 2nd, Masters his Stearman PT-17, which had received fifth Rick Constable, 2nd Expert high static of 2550 in Paris in 1984. This Rene Grebe, 3rd, Expert 40% of the top 25 fliers at the time around, a lower static, 2257, made it Sam Kilpatrick, 4th, Expert 1985 Nats flew our designs. tough for him to finish any higher than his Todd Kopl, 4th Sportsman ninth place. Ron Hesslebrock, 5th, Expert Thanks Again, Guys! Once again the Russians walked off with Dave Wenzel, 5th, Sportsman the first three places individually and first place as a team. Their models are good, but Our latest refinement of our TIPORARE design is the new I really feel the statics received were dis­ TIPO +. It’s simple, light, and accurate. Great for FAI or AMA proportionate to the quality of the models present. In addition, I had occasion to schedules. For AWE-FUN performance, add any side or rear watch the flying this time, and I was not as exhaust .60. impressed as I had been in the past with the Now available: TIPO+, TIPO 750, HIPPO TIPO (825), and flights by the Russians, even though they received top scores. SLIM ZLIN. R/C INDIVIDUAL STANDINGS, Write or call for full information. 9TH WORLD SCALE CHAMPIONSHIPS M MIKKENSCHIAGER GER BRISTOL -scour DICK HANSON MODELS ALL SHIPPING VIA UF>S H ZELLER SU1 M COMET AVAILABLE DIRECT FROM UPS CHARGES EXTRA K OETIKER SU> m e -KINGMIISTER- 5269 LUCKY CLOVER LANE C FOSS GBR CMLOTf I DM IfcS PHOME: (S O I) 2 6 1 -1 4 0 2 D MAJHRTON AU5 D€ HATH LAND DROVER MURRAY. UTAH 84123 P AONDS BEL MJCfAar 1 STEINBCRGER GER BE it ΚΛ It Of WON SWE 81 -TICERMOTM C. MAPELLI IIA SORREL C.UPPY- S SAUCER USA ST1NSON M And it Flies so Well Too! U/C INDIVIDUAL STANDINGS, 9TH WORLD SCALE CHAMPIONSHIPS I V EIDOSOV USSR ANTONOV AN 2B i V BUtATNIMX USSR AIR-1 1 A EWVtlNKO USSR U-Z $22.95 4 M KA/IROD POl TUN sot i * # 5 M REEVES GBR Z52t-ACROBAT- Kit #113 h ■ TRUflOVf GBR HUNK!I HI2I9 1 NOW AVAILABLE FOR 7 I «RE/ USA B-17 -FLYING FORTRESS' B l POOGORSKI PCX 9B MOSQUITO- THE 1st TIME, THE MUCH SOUGHT * R SEARS USA STEARMAN PTI7 la I ABU USA pip er o - c u r Sizzler F/f jjx titi0n 9th FAI W ORLD SCALE CH A M PIO N SH IP R/C Team Results 1. Swiss 16252.9 "INLAND SPORT” 1/4A-S3, L/2A-S4, AB-S5 Old Timers, Antiques, RC, Ut, F/F, Scale 2. Germany 16224.9 37'/»" Wing / .049 R/C, .020 or Electric 3. C. Britain 15670.6 Illustrated Plans Book — S1. Piione (703) 273 9593 15338.7 FREE with an Order ^ 1 4. Italy Flyline offers 22 beautiful Scale Designs 5. USA 15025.8 50c brings our Catalog Brochure. B&D MODELS 1 6. Sweden 14420.1 FLYLINE MODELS, INC. P.0. Box 12518 7. Belgium 14414.4 P.O. Box 2136. Foirfox. Virginia 22031 U.S.A. Reno, Nevada 89510 8. France 12644.6 9. Norway 12607.8 10. Denmark 12565.3 PO TEN T 30 11. Japan 12250.3 • CARBON FIBER Poland 11534.8 A Lightweight * —Industrial Prices— 12. * Fast Building P-30 # 13. Australia 10441.4 •Carbon Fiber-Tape & Laminates With A Pre-Rolled # 14. Netherlands 8112.9 \ Motor Tube. · •Composite Materials TIbbu·. Prop, and · • Kevlar®-Tape & Cloth 15. Austria 7438.4 / φ Machine Cut Riba · Send S A SE for sales sheet to: 16. Finland 6931.3 Rubber Included · AEROSPACE COMPOSITE PRODUCTS 17. Canada 6807.9 28 Cross wood Rd. · Farmington, CT 06032 Only $12.95 * 9th FAI WORLD SCALE CHAMPIONSHIP COMMANDO FOR 1/2A TEXACO $25.95 time. I am sincerely hoping that you are B-70 FREEFLIGHT 17.95 U/C Team Results TAU8E 1/2A RC 22.50 finding this an enjoyable project. Good 1. USSR 18410.1 Luck! · 2. Poland 13845.1 Send S.A.S.E. For Brochure 3. G. Britain 13490.5 Add $3.00 for Shipping end Handling. 4. USA 13297.0 CO D Add $2.00. Calif. Ree. Add 6% Tax Simply Scale. C ontinued from page 15 Matter Card A Vita (916) 965-3569 Sat. A Sun. 5. Norway 1999.0 Pherli Model· P.O. Box 804 Folsom, CA 95630 ing that something is getting lost in their This could be the last World Champion­ translation of the FAI rules. Watch out for ships for F4B, Control Line Scale. To make them in the future! this competition legal, the Norwegian club 70 seconds in a Prague hall 30 feet high, Our Control Line Team from the United entered as the fifth team, "competing" with on 1400 winds of the motor. It can fly in States didn't fare much better. Most popular a profile P-51 w ithout even a throttle. Inter­ a small space, because its turning di­ on the team was young Julie Abel. As ex­ est internationally has dropped in this ameter is small. But in a larger space you pected, Julie's picture graced the front page event, and unless something happens soon can increase the flying circle, and the Ra- of the local paper on the first day! Julie's fly­ to generate more participation or a waiver cek will climb, giving you longer flying ing was solid with her Clipped Wing Cub, is made on the number of teams required to

80 MODEL BUILDER BADGER... Tools to help you finish like a pro For the serious modeler looking for an extremely versatile air-brush that can blend, shade, stipple and do special effects such as smoke and weather damage, etc., the dual-action internal mix BADGER Model 150 is ideal. Bottom feed makes it suitable for the left or right handed modeler and is equally balanced. This teature also allows for quick color changes. The jar feature allows you to work large scale. air-brushes and The 150 offers a choice of three head the hi-production assemblies and depending on which is spray g used you can spray any material that is spray patterns. The reducible to the consistency of heavy 400 is available with fine, cream (i.e. acrylics, dyes, inks) and medium or heavy spray tips most paints used by hobbyists, and adjusts for round or fan craftsmen, artists, etc. spray Operates with BADGER Hurncane Model 180-4 '/> hp. The BADGER Model 200 single action compressor or larger unit. internal mix bottom feed air-brush will produce the same professional spray BADGER'S Foto/Frisket Film helps you © BACO 1983 as the Model 150 without the flexibility customize and make special lettering, of being able to change fluid amounts logos, insignias, etc. It is a 2 mil adhesive while spraying. The Model 200 has backed vinyl custom mask and stencil Ask your favorite hobby or craft store about fine many of the fine features of the 150 material which is easy to cut and will not BADGER products. For a complete color and is ideal for the beginning modeler buckle along cut edges when sprayed on. catalog BA 300 Vol. 7 send $1.00 to or anyone not requiring the Available in convenient sheets or rolls. cover postage and handling to Dept. MB84 controllability of a dual action air­ Prices slightly higher in Canada. brush. Use BADGER'S Fluid Filter to eliminate lumpy paint or foreign particles that would BADGER'S 400 Detail/Touch-Up Gun is normally pass through the air-brush the ideal'aid for finishing larger R/C and cause plugging. Designed for use BADG€R AIR-BRUSH CO. models. This lightweight gun bridges with air-brushes that use jars or bottles, 9128 W. BELMONT AVE· FRANKLIN PARK, IL 60131 the gap between the small precision it slides on and off for quick cleaning. DistinCanadaby H088YINDUSTRIES·24RonsonDrive Rexdaie.OntarioM9W1B4 make a World Championship in an event official, there w ill be no future C/L World For Precision Sanding on Large, True Surfaces Championships. Overall, although we weren't tremen­ dously successful in the competition, we all • Won’t enjoyed the trip. Norway is a beautiful wear out country and the people are extremely • Makes friendly and make you feel welcome. The sanding easy hotel accommodations were excellent, and it's obvious that the Norwegian Aero Club No 141-11 inch No. 142-22 inch put a lot of effort into making the ninth $2.50 $3.75 World Scale Championships a success. (Add 20% for postage ) One last time I would like to thank all For best results use those fine people who unselfishly con­ RUFF STUFF Self Adhesive Sheet Sandpaper- No glue No tributed their time and resources to assist drying time Ideal for special sanding shapes the U.S. Team in our trip to Norway. Thanks Adheres to most materials 9**x11" sheets Choice to Hazel and Maxey of Sig Manufacturing of Medium. Fine, or Super Fine 92C ea. for our shirts, jackets, fuel, etc., etc. Thanks APPLIED DESIGN CORP. · 738 Penn Street · El Segundo, CA 90245 to Airtronics for their support and contribu­ tion of the radio to our raffle. Thanks to Scandinavian Airlines System and Nino for helping see us off in New York, storing Dironza of the AMA Travel Service for mak­ our vehicles during our trip, and greeting us ...A BLAST ing the travel arrangements and handling again on our return. Gears don't turn our model boxes in the most economical smoothly without a lot of greasing from FROM THE PAST! people like Tony and Nick! manner. Thanks to all those folks in Detroit; JIM WALKER'S CLASSIC GLIDERS the Skymasters, the Flying Tigers, George After competing in three World Champi­ South, Henderson's Hobbies, and Tom onships, you might ask, "Will you do it '74” 3 P a k ...... *4.95 McCoy for their moral and financial su|> again?" We'll see. "404" INTERCEPTOR port. Thanks to the Mid-Hudson R/C Soci­ * * * .. Folding Wing Glider ety and their generous contribution to the That's about it for this column. I'm head­ * · U-Build-lt Kit ...... *3.95 Scale Team Fund. Thanks to Al LaFamina, ing out the door to the Nats at Lake Charles. Director of Component Overhaul at Pan Perhaps I'll have a new perspective on the f f · Ready to Fly ...... *7.95 Am in New York, for the tour through the Nats for you, since this year I'll be doing «X. Add $3 postage and handling for first 2 packages. 10% each additional Pan Am maintenance facility. Thanks to static and flying judging and not Bjorne Minge for the tour through the Nor­ competing. ^ AmatcatJujtwr wegian Air Force C-130. And thanks espe­ Flight maneuvers continue next column P.O. Box68132 A IR C R A FT CO. cially to Tony Ristuccia and Nick Capriotti with the loop! * Portland. OF! 97268

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 81 bled from the individual cells w ill also have that same capacity. There is more good news in connection with this battery, which is officially known as the VARTA TR7/8. It can be charged at the usual C/10 rate; or ten mils in this case, but is also rated for rates as high as C/5. This means that you can charge it in half the time, at 20 milliamps. There is no informa­ tion given by Varta about yet higher charg­ ing rates, but I am sure that it can be done. "R eady for Take-off" The question is just how high, and what w ill it do to cell life. Actually, the matter of quick and fast charging is seldom addressed by the battery manufacturers, other than mentioning that such charging should be done only with voltage and/or temperature monitoring. Rates such as used by the electric flyers and R/C car guys are unheard of anywhere else and one battery representative that I at­ tempted to talk to about this subject told me frankly that they didn't even want to know that their cells were being subjected to such treatment. Anyway, the Varta representative in this country is Varta Batteries, Inc., 150 Clear- exploded **·w to show Shuttle's elegant simplicity brook Rd., Elmsford, New York 10523. I have seen these batteries at electronic sup­ Until now. RC Helicopter mod­ els have required time for build­ pliers locally, but unfortunately, I do not in g and set-up. The ‘ S h u ttle " is know of a mail order retail supplier. I w ill re­ easily and quickly ready for its But - th t on· you buy c o m ** fully Λ p s m fd first flight. It comes fully assem­ search that possibility, and report on it later bled and painted...just add the if I come up with one. In the meantime, if engine and radio and fly! It can easily be ready tor the flying field the same day It is pur­ any of you know of such a source, please let chased. Hirobo's Shuttle is a fully acrobatic helicopter. Don't be misled by its simplicity; the Shuttle has full collective pitch, bell hiller mix and... autorotation; so it is a competition me know and save me some time, I can use class helicopter which suits both experts and beginners alike! The Hirobo Shuttle is now all I can get. available at your lo ca l hobby store. Suggested retail price...*245.00 BATTERIES ARE VERY IMPORTANT to us R/C'ers, and the subject of a lot of my mail. Included this month is the following letter from Don Springer, of Columbia Falls, Mon­ tana. He writes: "Sure enjoy your column in M odel Builder. Though electronics is strictly Greek to me, I still enjoy reading your column and getting new ideas or better in­ /QOftHAM TEAM sight on this hobby.

Sand $2.00 tor an Illustrated catalog A technical literature. "I have a question for you that I hope you can answer for me. I would liketo put an on­ board ignition system on some of my planes. I do not want to use a Ni-Starter for

Oomam Modal P ro d u c e 23961 Craftsman Rd.. Cat abases. CA 91302 TSL (818) 9924195 / TW X 9104945933 my power supply. Would it be feasible to use a 9-volt battery w ith the voltage stepped down to 2 volts. If so, how is the voltage stepped down, and can the voltage be ad­ justed between 1-1/2 and 2 volts?" Well Don, since you threw that word "feasible" in there, I have to tell you right off that the answer is, "No!" But I'm not going to leave you like that; I'll attempt to explain Keep It Scale and Simple! C liff Tacie, why not. ATTENTION 1Λ SCALERS 49404 Michelle Ann Dr., M t Clemens, The reason is simply capacity! Electroni­ EPOXY GLASS COWLS FOR: Michigan 48045. · cally, dropping a high voltage down to a NOSEN. PICA SID MORGAN. BALSA USA PLATT. CONCEPT FLEET HOSTETLER RCM T CRAFT. SHE BE R PITTS »/* ft % smaller required value is quite common, SCALE. SUPER CUB. FOKKERD-7 BOEING P-12. P 26 . F4B2. F4B4 SPARROW HAWK. GEE BEE MOD V MAC BRIE NS Electronics... C ontinued from page 18 and requires only the addition of a series TURBULENT. CHRISTEN EAGLE. BRISIGHELLA S STARDUSTER resistor. The value of the resistor can be cal­ II. ·/» SCALE J3 BI BABY FLYBABY ft OTHERS named "Varta." This is a name that we culated divided by I (Current). We know the WHEEL PANTS FOR: CITABRIA STARDUSTER IL PITTS. SKYBOLT LIBERTY SPORT R/C'ers are not too familiar with. It is a Ger­ voltage to be nine: from previous experi­ CHRISTEN EAGLE. PS E HAWK. MULLIGAN b OTHERS LARGE SCALE PLANS AVAILABLE man company, but with worldwide repre­ ence, we know that a glow plug draws Please send $1.00 for complete list sentation and not unknown in the elec­ about two amps of current. Our answer tronic industry here in the US. It then, 9 divided by 2, is 4.5. Ohms, in this We supply Modelers with fiberglass parts tor your plans— Write or call us: manufactures just about all kinds of batter­ case! There is also a wattage requirement in T & D FIBERGLASS SPECIALTIES ies made, from the old-fashioned zinc- the case of a resistor, which can be just as 30925 BlOCK GARDEN CITY. Mi «8136 carbon to lithium. Anyway, its Ni-Cd simply calculated using another form of PHONE (313) 421-6358 replacement for the 9-volt so-called "tran­ Ohm's Law. However, all of this is simply for BRAZED h HEAT- TREATED WIRE GEARS» CABANES sistor" battery is rated at 100 milliamps. Ob­ the sake of discussion, and so that you w ill PHONE (313) 261 9064 viously, this means that any pack assem­ have the information in case you need to

82 MODEL BUILDER F - 1 5 Eagle 1/7 Scale Finally . . . a Practical Twin Ducted Fan Project.

Thousands of satisfied modelers currently flying Byron Originals jets serve as proof that when we release a kit. you can be sure it is a project you can confidently build and fly . . . not just a dream designed, built and flown by its designer and a few others. Our new F-15 Eagle is no exception! The F-15 is designed around the proven Exceptional Performance Byro-Jet Propulsion System. With its twin Byro-Jet Fans turning at nearly True Byro-Jet Style . . . 20.000 rpm and producing 24 - Take-off distance, on a paved runway, is less than 2 4 ' / j total pounds of thrust, the 250 feet. With a little practice, nose high landings are Eagle delivers all the speed, predictable. The F-15 climbs with authority at a good, steady rate of climb and maneuver­ rate and has a solid, positive, groovy, responsive feel. ability you expect from a Engine - out performance is outstanding . . . slight trim changes Byron Originals jet. enable hands-off straight and level flight - no need to land until you're ready! Plus, the Byron F-15 offers unlimited scale possibilities and it's priced com­ petitively with other twin engine jets of comparable size.

The Unique and Exclusive Components of our new F-15 are far too numerous to even attempt to describe in any magazine ad. For a Detailed Info Pack (includes brochure, owner's manual, set of reduced construction drawings and kit pricing) send $2.00. Get the full story on the F-15 and its long list of exclusive features.

Specifications Custom Retractable Main Gear · Revolutionary New Nose Wing Span - 70” Channels - 5 w/retracts Gear Design · Pneumatic Landing Gear Brake System · Length · 8'9" 7 w/speed brake and Functional Pneumatic Speed Brake · Detailed Fiberglass Ready-to-fly weight - 28 lbs. landing gear brakes Fuselage with Factory Installed Formers · Plug-in Wings, Power - Twin Byro-Jet Performance Systems Stabs and Fins · Easy and Precise Construction Methods. w/O.S. .77 orequiv. Byron Originals·Box 279*lda Grove, IA 51445 Ph: (712) 364-3165 apply it somewhere else. lightcell, only about 1-1/2 times as long. It is tion of your choice, are priced at $10.62. The point is that at two amps drain, the 9- rated at 7000 milliamps; the D Ni-Cd is C&D also has available a strap-on Ni-Cd volt battery, which in an alkaline version rated at 4000. Included in the list are the pack for your favorite type of starter; 12 volts only has a capacity of 500 milliamps, popular 1200 milliamps sub-Cs, and if you in your choice of D or F cells. would last less than fifteen minutes in this need a tad more, an 1800 mil C. As I said, For complete information, including application. Probably even less, as such ALL sizes. prices, contact B&P Associates at P.O. Box batteries are made to provide their rated ca­ Prices? Reasonable—the AAs, rated at 22054, Waco, Texas 76702-2054; (817)662- pacity at very low rates, such as needed by a 540 mils, with solder tabs are $2.63 each. 5587. O ur in-house man there is Max Blose, transistor radio or calculator. Generally Four of them, welded up into any configura­ an active R/C’er with whom I spent a num- speaking, the harder a battery is asked to work, the shorter its life span. If asked for a recommendation, I would REPRODUCTION PARTS vote for Ace R/C's "Nilite III" on-board igni­ tion package. The $32.95 kit includes everything needed, from the Ni-Cd cell to FOR ANTIQUE IGNITION ENGINES the plug connector. I especially like the • SPARK PLUGS • POINTS switch box through which the throttle link­ • TANKS age runs, allowing you to set the turn-on • TIMERS point exactly where you want it. Another • NEEDLE VALVES • COILS nice feature is that a charger is included, • EXHAUST STACKS • PROP DRIVES and finding one for a single Ni-Cd cell can be a little frustrating. Keeping a little fire on that plug at idle sure does help some engine installations! m m STILL MORE ABOUT BATTERIES We have another battery supplier on the M 1 , scene, which looking from my viewpoint as a consumer, is great. A little competition s a p should not only provide us better products, but should do so at lower prices. Anyway, this month, we want to introduce B&P As­ sociates to you EC readers. It can supply you OVER 600 ITEMS FOR MORE THAN 60 ENGINES with any size Ni-Cds from AAs to Fs, either singly with or without solder tabs, and in SEND $2.00 FOR CURRENT CATALOG any configuration you need or can dream up. MICRO MODEL ENGINEERING To refresh your memory, a size F cell is the 1301 W. LAFAYETTE ST., STURGIS, Ml 49091 same diameter as a size D, the large flash­

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 tailplane, grain crossways again. The top forward sheeting has the grain fore and aft STAINLESS STEEL PRECISION and incorporates a 1/64-inch ply doublerto reinforce the motor mount. This will break BALL BEARINGS in a crash, of course, but is easily fixed, and your motor w ill survive. Add the little bit of 1/8” , 3/16” & 1/4” 1/16-inch sheet across the nose, the built in INSIDE DIAMETER headwind, and cut a hole for the motor. LANDING GEAR ν' Mixed Assortment Bend up the landing gear. You may wish Shielded Class 7 Precision Open to change it from the plan, to bring the wheels back in-line with the wing leading edge. As shown, there is a slight tendency Assortment of 24 Bearings - $ 1 8 .0 0 to ground loop if there is no wind at all. I wouldn't change it myself. The low C.G. Including postage. Calif, residents add 6% sales tax. and side stance mean no tipping, even in a CHECKS ACCEPTED - NO COD. moderate crosswind. The long tailskid lowers the ground angle, which helps to re­ Champion Industries Inc. duce the ground looping tendency induced 2233 Milo Drive by the forward position of the wheels. Palm Springs, California 92262 Bind and glue the landing gear wire to (619) 320-0411 the forward hardwood crosspiece (another ice cream stick). Set it in place in the fuselage, notched into the fuselage sides, and prop everything up to check alignment. The inner end of each axle should be off the ground about 1/8 inch, and toe-in should be 2 to 3 degrees. Thanks to Euclid, the toe- in should just appear automatically, if you bend the landing gear according to the month's efforts, I have to start packing for a plan. two-week adventure there and in Panama. I Glue the forward crosspiece in place fol­ expect to have the time of my life .. .b u ll'll lowed by a further crosspiece (yet another be here next month! See you then. · ice cream stick), beneath FI, to retain the landing gear. Complete the bottom “Matched Performance System” sheeting. for TO P PER FO R M A N C E Footrot Flier.. Continued from page 21 Cover fuselage and tail surfaces with tis­ K&B ENGINES sue, give three coats of thinned and elasti- Airplane Marine the "brick" and is operated by pull threads cised dope and decorate to taste. Only K&B FUELS K&B GLOW PLUGS 9 Blends 4 Choices that poke out of holes in the fuselage sides. odds and ends left to do now. I don't think you should consider using Fasten the elevators temporarily in place “Matched Finish System” radio equipment weighing more than say 3 with masking tape to maintain alignment for BEST APPEARANCE 0 2., unless you are somehow still able to K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER and join with dowel or the bamboo sold as K&B SUPER POXY RESIN K&B SUPER POXY THINNER keep the overall weight under about 17 oz. kebab skewers. Then sew in place to form a K&B SUPER POXY PRIMER K&B SUPER POXY PAINT In particular, the linkages to the rear must h i nge. The adj ustment device shown on the K&B MIXING CUPS be light. Perhaps you're thinking that an As­ plan is fiddly to make, but aids trimming. K&B MANUFACTURING tro 035 would handle more weight. But Complete tail-surfaces, tail-wheel or skid, 12152 Woodruff Avenue then you would have to reinforce the struc­ fit main-wheels and wing retaining dowels. Downey. California 90241 ture which would add even further to the The prototype Footrot Flier used home­ weight. Then more wing area would be made balsa main-wheels, but I think the ber of great weekends contesting in desirable. You've designed a new model! Williams Bros, type would be fine. Guadalajara, Mexico. Max, I expect to see Not that I'm trying to put you off. It might Motor (not engine) bearers are made of you in Costa Rica next May—and I won't ac­ turn out very nice! hardwood (something a little more substan­ cept no for an answer. If you're still building the Footrot Flier, the tial than ice cream sticks this time) and Speaking of Costa Rica, finishing this top sheeting goes on between wing and epoxied to the sides of the motor. Epoxy nuts under the mounting plate and install motor with sidethrust as shown on the plan. MAP Plans & Drawings The w iring shown on the plan is effective and light, though somewhat crude. The SCALE Scale drawings of military, civil, private and light aircraft, as well as charger is connected by alligator clips to DRAWINGS scale drawings o f m ilitary vehicles. the apropriate terry clip and motor termi­ A f R O Free flight plans — vintage, scale, competition and gliders. nal. If you use the neat, but heavy, charger U-Control plans — vintage, scale and com petition. socket and switch supplied with the Astro 020, fit these to a 1/64-inch ply panel under MODEL Boat plans — sport power and sail, competition, yachts and steam, the forward part of the fuselage. In any case, B a n s car plans. do make provision fora 10-amp. fuse. Mitch Mocte^or Plans for steam engines, petrol engines, traction engines, locomo- Poling has recommended this on many oc­ 1 tives, buildings, cannons and clocks. casions. The fuse w ill save your motor ar­ mature when you run off into the long grass RADIO CONTROL All type of radio control aircraft — scale, competition, sport and AIRCRAFT during takeoff. gliders. May I remind you to stick the wings to­ Every type of plan for the scratch builder. All cata- ...... Λιυ„ gether now? Fit small 3/32-inch sheet locat­ logs $1.50 each, or all 5 fo r $6.00. Specify catalog de- Jlvl LU rrtnlitn rLHIMo sired, and make your check or money order payable to 1304 Palm Avenue ing pieces under the wing center section. JM Lupperger Plans California residents add 6% tax. Huntington Beach, CA 92648 These should fit neatly into the corners of Allow 2 — 4 weeks delivery. 3 ' the fuselage opening to prevent the wing moving in flight. In case you think the struc-

84 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ture looks a bit flimsy about the wing open­ ing, remember that when the wing bands are in place, the wing center section be­ THE ASTRO CHALLENGER comes part of the fuselage. 1984 nats winner I think that’s all. Now the trick is not to de­ stroy the whole thing during initial trimming. TRIMMING FOR FLIGHT was the sensation of the 1984 Support the Footrot Flier with a finger un­ Bob Boucher's RENO NATS. Its fantastic rocket der each mainspar, near the fuselage. In Astro Challenger electric like climb and floating glide put it ready-to-fly condition, with batteries dis­ powered sailplane > way out in front of the competi­ charged, it MUST balance with the top rear tion. The distinctive wing planform edge of the fuselage level. Move motor bat­ with elliptical tips maximizes aerodynamic efficiency teries to achieve this. The procedure for trimming a free flight and at the same time gives this contest champion a very model, which the Footrot Flier basically is, gentle nature that is perfect for beginners too. The deluxe kit has been published thousands of times. features all balsa construction w ith precision machined w ood parts. However, I would suggest before going to The kit is designed for the Astro Cobalt 05 geared system (#6505) including seven the flying field, some hand glides in the 800 mahr nicad cells. W ing span is 72 inches and wing area is 620 sq. in. Bob's back yard from a kneeling position are in original m odel weighed 39 ounces com plete w ith astro 05 cobalt system, electronic order. This devout pose w ill probably not motor control (4023), and three channel radio. Challenger Kit #1020 bring you divine assistance, but you w ill find out if anything is horribly wrong, and the model has less distance to fall. Leave the The Astro Cobalt 05 w o rld class com petition m otors provide the highest possible propeller off for the hand glides, so that the power in the smallest possible size and weight. motor shaft won't get bent if you drop the The cobalt 05 direct drive motor weighs only 5 whole thing on its nose. ounches but turns a 7 x 4 prop at over 14000 FLYING rpm! The geared 05 turns a 12x8 folding prop At the flying field, if you have a smooth at 5500 rpm! This tremendous power makes runway, the following procedure seems to electric flight truly exciting. All Astro Cobalt _ __ minimize the risk of damage to the model: motors use precision machined modular construction, ν ,τ :* f J L Set the elevator about 1/16 inch down, with twin ball bearings, rare earth samarium cobalt magnets. the adjuster. Now give the motor batteries a Super high temperature wire, silver brushes and gold pin connectors. Gear short charge, sufficient for a run of about 15 boxes use precision machined housings, tw in ball bearings and stainless steel seconds. Gradually increase charges, and gears. Astro Cobalt motors are truly a breakthrough in the state-of-the-art. keep each hop strictly straight ahead. At Item #6605 first the down elevator w ill probably pre­ vent take-off and w ill certainly prevent a stall. Reduce the down elevator and in­ crease the charge until you are ready to go Bob’s Challenger uses the Astro Electronic Motor Control #4023 to turn the for broke. I taught myself to fly R/C this way, motor on and off by radio command. The motor control is specially designed with one of the Footrot Flier's ancestors. fo r electric sailplanes and old tim ers has Here is thegeneology of the Footrot Flier. a built in dynamic brake to stop the prop Overall appearance is my hazy recollection £ when the motor is turned off. Dynamic of a sweet little, Bostonian-like, rubber- ® braking is needed to stop the prop and powered design by Sherman Gillespie. I allow it to fold. The high power 30 amp wish I had access to the plan now. It ap­ relay handles up to 40 size motors. peared in MAN in 1948, I think, and was Item #4023 called “ Yard Bird." That name really meant something then, to jazz fans anyway. Sur­ face outlines are more or less Pietenpol. The name and crew members are from a VISIT YOUR ASTRO DEALER AND SEE THIS WINNING COMBINATION comic strip farm created by New Zealander,

Murray Ball. This may be a local curiosity proudly made in the U.S.A. by and hard to find at the newsagent, but you are in for a treat if you do stumble on it. l RSTRO FLIGHT IIIC I would like to hear from anyone who 13311 BEACH AVE. · MARINA DEL REY. CA 90292 · PHONE (213) 821 6242 tries the Footrot Flier, and help if any prob­ lems arise. If you write, please enclose a Fellow club member, Dwayne Brown, re­ the bottom of the connecting rod's hole is self-addressed envelope and International cently showed me a new-in-box Russian en­ too big for the shaft's crank. The top of the Reply Coupon. gine he'd bought in a Dallas hobby shop rod is loose too. The rear disc rotary valve Good Luck and Good Fun. John Reid, awhile back for $12.00, and it was complete fits loosely on its pressed-in-place pin; Teal Valley, Nelson, R.D. 1, New Zealand.· with printed instructions, a stamped black there's a rattle there too! And wonder of steel wrench (it fits nothing on the engine), wonders revealed a steel drive pin that's four mounting bolts, and the thinnest- part machine-made and part filed by hand EOTW...... Continued from page 36 walled fuel line I've ever seen, and it carried to fit. Its long end loosely fits in the inside of serial number 02. Interest renewed! the crank and its short end loosely fits a slot anodizing on the cylinder jacket, spinner, Dwayne's engine had internal rattles too, in the rotary valve and drives the valve and prop washers and a neat near-1/16-inch and it too was a MK-12B! I was still sure the around as it all rattles. deep blow hole in the casting above the left "B" still stood for "BAD," and testing We photographed the steel drive pin up engine mount. Its serial number is 82663, resumed! close, and put my engine's needle valve in indicating high volume production. . .and The decision was made to photograph the picture so you could see it was evidently it had loud internal rattling noises (not the the innards of Dwayne's and to run mine. shaped by holding (by hand) the end of the prop washer on the shaft) when shaken Photographing Dwayne's was easy; getting needle to a spinning grinding wheel and vigorously! I put it in a plastic bag and filed mine to run was sumptin' else! It was easy to turning to get it sort of tapered. Dwayne's it away. find the source of the rattling. You can see engine was certified as being produced on

NOVEMBER 1986 85 from the fuel. Just check that front prop contra piston was contributing to the rattle! RELIABILITY IS OUR PRODUCT washer too! The needle valve on both en­ Then with a slightly different setting the “High-Am p” Powerpole · gines rock back and forth about six total contra piston would seal and compression Modular'Silver Plated" Connector spray bar. If it wasn't for the spring steel de­ would return and the engine would fire. Af­ Rated 30 Amps at 600 DC Color Co-ordinated tent pressing against the needle valves, ter a bunch of handcranking, it was obvious they'd rattle too!! I needed help in the form of my Sullivan Connectors The translation of the box's panel facing starter. Turning the needle mixture lean Designed for anything electrical the camera is: with the hand-ground needle valve was requiring quick disconnects. compression stupid. It would go from full rich to too lean in less than a quarter turn of the needle, The Ideal Power Pack Connector tor your electric MICRO ENGINE 2.46cc plones. cars or boats Designed tor a high vibration for models since the needle wasn't round in cross sec­ environment Cycled ten thousand limes without type 1 price 8 rubles tion. A bit of Yankee ingenuity and R/C py­ electrical (allure They'd like to think the ruble is worth one lon racing experience got me to squeeze the fuel line as the MK-12B started. That way Anderson Power Products, Inc dollar.. .so the price is about $8 in Russia. $12 in Dallas is a very modest price indeed. I could squeeze a little more and lean the The instruction manual (16 pages) shows engine out for best running. Much fid- a drawing of the earlier engine I'd had dling/turning with the needle found a spot break.. .but pasted over the picture is a where no squeeze was required, and that's drawing of this slightly later MK-12B. The where the damn thing sprang to life and earlier engine was rated for peak power at ran! 18,000 rpm, but that figure is crossed out I had the ProTach turned "on" and the and 14,000 has been written in by hand. I camera was all focused and ready as I got personally felt the engine if run at 14,000 near that ready-to-run setting. When it ran I SORRY NO PERSONAL CHECKS rpm (or 18,000 rpm) would be kinda like a got the rpm reading and the picture both in OR C.O.D. ORDERS hand grenade with its pin pulled, sitting the first ten seconds and moved back a safe Only certified checks or money orders accepted there on my test stand waiting to "go off" distance. I couldn't believe how steady it Minimum order $ 10 00. tor three packages of 4 and scare the hell out of me again! Power is ran—it didn't miss a beat—no wavering rpm Powerpoles (S3 0 0 per package plus $1 0 0 ship­ rated at .28 Kw. Can anybody out there tell figures (there's nothing tight enough inside ping and handling) CT residents add 7 5% sales tax Prices subject to change without notice me the conversion? the MK-12B to bind!), no sputtering, it ran Specified fuel is one-third technical ether Dealer Inquiries Invited. out the whole tank! I did it three more (the kind used for priming diesel-engined For lurlher information and deoler prices send SASE times, the rpm stayed rock steady at 10,750 and Bus Card to: trucks in Siberia on cool mornings), one- and there was no vibration! Each time I third kerosene (like the same trucks burn), moved the needle valve a click or two to try SERM 0SR/C and one-third oil, half the oil is specified to for more revs, it quit. Each time I moved the SNAP CONNECTORS be bean oil, like castor. I used my standard compression screw, it almost quit. It was an Cedar Corners Station Florida diesel mix, the Master Airscrew 9-4 experience. All they gotta do is put a good Box 16787. Stamford, CT 06905 for .15s and had one bad time getting this ol' American Sullivan starter in with every thing to run. Russian MK-12B manufactured. I wonder Regular readers of this column have how many of the other 82,662 MK-12B's (re­ learned that model diesel engines have a member my serial number?. . .82,663)ever STRIPPED GLOW PLUG THREADS? 4-stroke heads are expensive and difficult to replace. We slug-like, tight-fitting, well-machined piece got started!!! replace your damaged threads with a stainless steel of metal that is called a contra piston and it RATINGS: Please remember I rate 10 as 1/4-32 insert, long or short. Much stronger than original fits in and seals the top of the cylinder and is aluminum or brass threads. Engine disassembly NOT excellent and 1 as poorest. The MK-12B gets necessary 2-strokes repaired also. Cashiers check or driven down by the threaded screw on the no points for design, as it's a direct copy of money order only (no cash) $13.95 per Insert plus $2.00 cylinder head to reduce combustion vol­ the German Webra Mach 1 engine. It gets 1 return freight (within continental U.S.) Send to: W.P.S., 15205 Raymer St., ume above the face of the piston. When the point for manufacturing excellence (the Van Nuys, CA 91405 · (213) 873-4596 screw is backed up, the contra piston slides spinner fits the crankshaft nicely). It gets 5 up (driven by compression) against the performance points for being a uni-speed February 23rd, 1980 (I think). There's a screw's bottom surface. W ith proper fuel/air engine. Value is $12 for mine, as it has been close up shot of Dwayne's number 02 en­ and proper combustion volume, the engine run. Dwayne's is worth $25 or more. Igor, gine. Fingernails were used to slide out the will run. On this engine, as the adjusting I'm sorry! · front ball bearing so you could see it more screw was turned w hile starting was at­ plainly. Dwayne's needle valve didn't get tempted the engine would occasionally the personal grinding attention mine got, lose all compression. That meant the contra Counter...... Continued from page 9 but it does have a soon-to-be-patented hook piston was a lousy fit in the cylinder; fuel (it shows better in its shadow) on its pointed and air would squirt out of the threads for degrees off center. High compression or end that's designed to catch pieces of dirt the adjusting screw. I was wondering if the flooded engines start with ease with the Sure Start, which has an adapter to convert all cone start systems to the Sure Start Sys­ tem. Made of aluminum and steel, the Sure B a t t e r ie s Start is for you! See your hobby dealer, or V WM M SR Batteries' buying power means big φ \ write to Du-Bro Products for more informa­ savings to you! These are factory fresh Sanyo 6 and 7 cell car tion. They're at 480 Bonner Road, Wau- packs with Tamiya connectors. We get conda, Illinois 60084. deliveries every month and the * * * packs go directly from Sanyo, to us, to you. You can be sure they're Astro Flight, 13311 Beach Ave., Marina 6 cell Stick or Del Rey, California 90292, has announced fresh new packs that haven't Hump packs $23.95, been sitting around for 7 cell Stick (one on top) or the availability of the new Astro Cobalt 60 months, or even Hump packs $27.95. FAI flight motor. This special super power years Add $3 per order for shipping and handling in motor is designed to win in FAI F3E electric o *continental U.S. Checks, Visa & MasterCard accepted. sailplane competition. This motor will turn Add $2 for UPS COD's. NYS add 715% Sales Tax. Questions? a 14x7 carbon folding prop at over 10,000 Call the SR Hotline 516-286-0079 between 9 am and 3 pm. rpm, and was used by Mike Charles at the SR Batteries, Inc. Box 287B Bellport, N Y 11713 FAI team selection trials, consistently scor­ ing 50 to 100 points over the competition.

86 MODEL BUILDER Benfom's unique Uni-Matic 2:1 gearbox doubles prop speed Bentom Zero In On Fun Bentom's tree-flight, rubber-powered Each Bentom model kit includes: Each kit includes a pre-assembled Military Series aircraft models are replicas of • 2 Props gear drive for added thrust and extended the fighter planes that controlled the skies of flight time World Warll. • 2 Sets of Rubber For more information about Bentom Crafted from rugged injection molded • Balance Weights models contact: California Model Imports, polystyrene foam, these flying models • Contact Adhesive P.O. Box 1695. Dept. B, Garden Grove. CA feature 19-20" wing spans and 50 gram • Lightweight Decal Set 92642 (714) 991-1720 flying weight. No tools are required. All you need is paint: everything you need for assem­ Collect, build and fly Bentom's complete CALIFORNIA bly is included in each kit. Military Series of Famous WWII Fighters. 7HODEL IMPORTS

The Astro Cobalt 60 is available in three windings: the FAI-F3E eight-turn winding is specially designed for maximum power Schlueter Free u u from thirty Sanyo mah NiCds. The FAI Pat­ Flight Models H o b b y H o r n tern 10-turn winding is designed to 3 5 0 8 Pomsettia Ave produce maximum power for the three or Manhattan Beach, Ca. 90266 O ld T im e r four minutes necessary to complete the FAI f r o m I f τ aerobatic schedule. Twenty-six to thirty Sanyo 1200 mah cells are used, and the 2.76. 1990 So Lonq $(T$30. 36 slower rpm and longer run. Typically, it w ill 1936 Buccaneer 89" $59.96. 1938 C lipper MKI 77"$U1.56 turn a 15x8 prop at 8,000 rpm for six to eight 1937 Dallaire 108" $75.16. 1935 Miss America 89"$71.96 1991 Playboy Sr 80" $51.16. 1991 Playboy Jr S9"$J1. 16 minutes. These motors are built in the USA 1938 Powerhouse 89" $53. 56. 1990 Sailplane 78" $89. 76 PARTIAL KITS (plans & printed vwod) 1938 T renton T e rro r 72" $90.76. 1990 Ranger 96$31.96 to exacting standards by Astro Flight. See PACIFIC ACE o r BLACK B U LLET 2 0 " . I 2 2 5 - 3 0 ''M 7 0 - 4 0 *:» 6 ,B 5 -A D O 12.00 SHIPPWG FOR EACH 1 TO 3 1939 Korda Wake 99" $19.16. 1939 M e rc u ry 72" $58. 36 your hobby dealer, or contact Astro Flight KIT ORDER —CA RES. ADO 6 *1 . TAX These kits qualify for SAM events (FF i R/C ), nnd directly. And be sure to tell them you read feature highest quality machine cut k sanded ports (Superior to all the Competition), all sheet und strip about their products in Model Builder. charge plug connectors, and accessory wood, wire, k window material. Plans arc the orig. * * * pack with extra screws and spacers, all for FF, but the models are easily convertible to 3ch R/C. KITS: Sailplanes. Electric power, or Gas. If you enjoy building and flying small free $24.95. From VL Products, 7871 Alabama Hobby Horn SENSOAR Glider. 78 " (or 05‘s) $18.00 Ave., -16, Canoga Park, California 91304. Midway Model GNOME R/C Hand Launch Glider$29.00 flight planes, here is a propulsion system Jolly Models FU N G E R R C H LG , S8" Span $29.00 designed just for you. VL Products has ♦ * * Midway Model FAST EDDIE Aerobatic ; 05 E!ec$19.00 Jolly Models ELECTRICUS Electric Glider 05's$32.50 created a new mini electronic propulsion Chopper fliers, attention! Here's a new Leisure PLAYBOY SR 67" for Cear 05 Elect. $30.00 system, called the EPS, for small free flight product designed by helicopter fliers that Astro ASTRO SPORT 37" for Direct 05 Elect. $22.50 Leisure WASP 37“ for Direct 05 Electrics $22.50 models. With the HY-70 motor, you can fly you'll love! It's called Yale Weight, a non- Midway ULTRA MK IV 86" for Geared 09 EP $39.00 metallic, two-part epoxy compound for Midway FLYING QUAKER 89" .90 .*5 9 stroke $69.76 most anywhere. The HY-70 weighs only Ι- 9k's/Midway DENNY JR. 72“ Alum Cowel $63.96 ΙΑ ounces, including the B-52 flight bat­ adding tip weight to your main blades. The 9k *s .Midway BUZZARD BOMBSHELL 72" $51.9b tery. It w ill power planes with up to 30-inch Yale Weight kit includes a complete set of FULL LINE OF ELECTRIC SYSTEMS l Parts” A'va!l. SHIPPING & HANDLING: 64 Page CATALO GUE wingspans. Easy to install, the battery just instructions, a mixing cup, stick, and ap­ Up to $8.00 add $1.50, $2.00 PP/let Class snaps into place for instant starting, with no proximately 80 grams of epoxy compound, $8.01 to $20.00 add S2.25. Λ copy will be sent $20.01 to $95.00 add $3.00, free -when requestod- wiring needed. The battery can be given a enough to do one set of blades, for only $95.01 to 570.00 add $3.50, with an order. fast charge with a VL EFC-500 or other fast $4.25. Yale Weight complies with AMA/FAi and over $70.00 add $9.00. HOBBY HORN CA Addressees add 61 tax. 15173 Moran St (B | charger and in two minutes it's ready for rules for adding weight to your blades; it Send MO, Visa/MC(iH Exp), P .O . Box 2212 another flight. The gear ratio on the HY-70 cannot be detected with a metal detector. or Check (allow up to 30 W estm inster. Cn 92684 days for CK clearance.) (714) 893-8311 motor is 7 to 1. The VL system includes the Most important, Yale Weight is formulated i COD= Exact Charges plus | Aft Hrs (719) 895-1203] B-52 "snap in" flight battery, two props, so that it does not delaminate from the rotor $1.50 Hdl. (Cash Only)

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 THERE'S NO OTHER SOURCE LIKE IT! Radi Thousands of photos and descriptions for up-to-date information on: •Aircraft «Cars «Boats «Radios r E •Systems «Engines «Hardware «Books •Finishing Materials «Accessories 1 T , •Videos and More «R/C Dealers

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To be eligible, sim ply fill out and return the reader survey form in each issue of the RCBG 10th edition. Winners w ill be chosen from a random drawing of all 'Reader Survey ' participants. 5 s * If your local hobby shop does not stock copies of the Guide, please send your request with payment of Ί 3 " (ΊΟ " plus postage/handling: *3**) to: Radio Control V

Clifton House«Clifton, VA 22024 • You moy use your VISA or Mastercard to charge the payment ! V Λ by sending the card number and expiration date with your order. δΟΛτ

blade during flight. The size of the slot de­ least 60 fittings alone, not including the full ball bearings. The rear wheels may be termines the amount of additional weight plastic detailing. See the new Coast Guard adjusted to give no roll-induced steeering, of the epoxy, and Yale Manufacturing will Lifeboat at your favorite hobby dealer now. roll-induced steering for maximum turna- slot your blades for 32 grams of weight for * * ♦ bility, or roll-induced stabiliing for begin­ $3.00 per set. For more information, con­ For the offroad racer, Parma International ners. The glass-filled, molded chassis tact Yale Hobby Manufacturing, Inc., 20 announces the exclusive introduction of monocoque with epoxy undertray gives H olly Lane, W allingford, Connecticut the PB Mini-Mustang 1/10 scale offroad maximum chassis stiffness and strength 06492. racer. The car is available in three fully up­ with minimum weight. An added bonus is a * * * gradeable versions; 4WD, including 2- low component count; each "corner" of the Altech Marketing has introduced a new speed gearbox; 4W D single speed; and car uses identical parts. Contact Parma In­ boat to the Billig Boat line, the U.S. Coast 2WD single speed. The PB Mini features a ternational, 13927 Progress Parkway, North Guard 44-foot Lifeboat. Designed for the high-efficiency single belt secondary drive Royalton, O hio 44133 for more details. modeler of average ability, the kit is easily using one high torque belt to drive the two * * * assembled, with an ABS hull, suitable for differentials, and the option of a two-speed Offroad enthusiasts should take note of R/C installation. The detail includes side automatic gearbox, offering optimum ac­ this new Big Bear Datsun truck from Model stakes, marker lights, radar, horn, search­ celeration and higher top end speed. Caster Expo/Euro Imports. With a foot-wide wheel­ light, winch, door with porthole, latch and and camber are independently adjustable base and a chassis that rides two inches hinges, as well as a handrail. There are at on all four wheels and the kit comes with above the ground, the Big Bear with heavy- duty rear spring suspension and indepen­ dent coil spring front suspension should be (714) 642-3799 able to roll over most any terrain with ease. The high-powered Mabuchi RS-480 motor provides enough torque to tackle most any incline, and the four gigantic semi­ pneumatic tires with deep "V-shaped The ‘super’ systems treads provides traction for any situation. The 1/12 scale Big Bear is easy to assemble, Maneuver, mix, adjust, and comes with good-looking decals to reverse and monitor. I complement your custom paint job. The We.introduced expo rates! Big Bear truck is available at hobby shops Three, six and eight channels everywhere, or through the mail. Contact Model Expo/Euro Imports, 23 Just Road, “STILL THE BEST!” Fairfield, NJ 07007. e M IL L C O T T * * * Millcott Corporation Cox Hobbies, Inc., has a way to introduce 177-F Riverside Ave. Newport Beach CA 92663 you to R/C flight the easy way; it's called the Eagle II Sailplane, an affordable, single-

88 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Only an experienced kit designer could bring you a field box that’s engineered this well.

Transmitter fits “sticks-in" for carrying, or “sticks-out" for starting and run-up.

Full one-gallon fuel can or bottle fits securely on Adjustable, easy-to-remove, end platform . sponge-padded cradle tilts 45° to both sides, takes fuselages up to 5'/<" wide.

Power panel compartment Easy-access compartment accepts all popular brands. for tach, cleaners.

Starter compartment accommodates all Battery compartment divider popular brands. isolates power panel.

Large, vented battery compartment with removable front panel.

Two large-capacity tool drawers with self-locking Velcro strips handle up to 13" props.

Slim-line profile and balanced load for easy carrying. Special woods for light weight and high strength. The Super Tote. From Carl Goldberg Models. yo u r kind of sense. sharp photos and drawings. From the logic of its layout to See the C.G. Super Tote at the high quality of its precisely cut your favorite RC dealers, or order materials and complete hardware one now. package, the Super Tote is a winner. It’s time you had a field box Your equipment is right where that was as well-engineered as the you want it, and with its balanced planes you fly. load and narrow profile, it even carries better than the others. And just like our planes, we CARL GOLDBERG As a seasoned RCer, you can make assembly easier with a fine spot it right away. step-by-step instruction booklet MODELS INC. This is the field box that makes that’s illustrated by lots of clear, 4731 WEST CHICAGO AVE . CHICAGO. IL 60651 We’re Back— And Bigger! The 2nd Annua, Two Giant Halls—Full of R/C ModEL & Hobby Planes · Cars · Boats · Trains · Games! • Boat Pond · Car Track

Show • Static M odel Com petition

October 10-12,1986 Admission: Adults: $5; Children (6 to 12): $2.50; (Trade Days: October 9-10) Children (5 and Under): Free. O’Hare Expo Center · Chicago For More Information — Sponsored by Call Toll-Free: 800-323-5155 Radio Control Hobby Trade Association (RCHTA) In Illinois, Call 312-299-3131

tight. . . but they're doing it in Europe and it sounds like fast fun! Another quote from Zdenek's letter says: f t "Electric pylon racing attracts me but, on the other hand, I know my nervous system A w ill hardly sustain it. It is good for excita­ S lf c .9 5 tion rather than for relaxation." The SQUARE EAGLE P-30 My old Astro ferrite motor and a new As­ SECCND, Gpan 190U ana 1905 Nats tro charger was sent to flying Professor Zde- FIRST, Senior ana Junior 1961 Nats CORPORATION F IR S T ANO SECQNO, Open 19B0 Nate nek when I got home. . .and along with FIRST, Gpen 1979 U5FFC this manuscript I've sent our editor the S T IL L WINNING! RACE CAT plans the three-views and specifications. Earlier we brought the free BUILD YOUR flight flyers the A3 FAI small glider class that was unknown in the USA. . .maybe we're THE 0LUE RIOGE SPECIA L THE BLUE RIDGE DART OWN ROCKET bringing something new home for the R/C 13 1/2* span, stick and 1A" span, a ll Qalsa, tissue construction only 7 glue Joints, pylon flyers. . .and those who like some­ spectacular clime. great flie r. 55.95 MOTORS! thing small, something quiet, and some­ THE COUPE ce WIl LE WE CAN SHOW YOU HOW! thing FASSSSST! (coupe d'nlver) Cur finest kit. Veteran j But meanwhile, our visa or permit for the contest winner U2\ 15-day stay in Czechoslovakia is getting S 2 A .9 5 •40 POUNDS close to expiring. . .we must be out of the country on schedule. We're tired because THE L IT T L E ZEPHYR THRUST! 11 1/2· span inaoor we probably averaged 300 to 400 miles a trainer, two to four A • 50Φ EACH! day and we've done so much each day. We m in u te f l i g h t s common. Two fo r $<*.95 retreat to G.H.Q., our hotel, late June 25th • With a rock tumbler and some simple hand tools with plans to cross out of the country into we II show you how to build YOUR OWN rocket British O.T. Fuse (red Add 12.50 shipping on engines in your own garage or workshop for 1 - 5 to Austria early on the 27th, our 15th day. On spiral thread) ID metres sil orders in the 1110 the cost ot the commercially maiketed motors $3.75 continental U.S. the 26th we lay back, repacked the trunk of • INTERESTED? Just send us S2 00 and we II mail you Arne's five-cylinder Mercedes, check our Machined Parts Quality Balsa our brochure along with a WORKING SAMPLE ol an U E'V E GONE OUT ON A L2VO TO PROOuCE THE B E ST! electric ignite» that YOU CAN MAKE YOURSELF trom Czech finances and realize we have enough QUALITY FREE FLIGHT KITS materials you li find around the house (just) money to pay our bill, eat on the 26th, AND SUPPLIES TELL YOUR FRIENDS A80UT US! We re the 00 IT buy six quarts of Mobiloil and a Purolator YOURSELF ROCKET people FOR COMPETITION AND SPORT. SINCE 1975 filter for the car. Leftover Czech money w ill Dealer inquiries Catalog 50c Write to Department m b - h The Teletlite Corporation be worthless in Austria. Arne had pre­ invited. 11620 Kitching St. Sunny mead CA 92388 bought enough diesel fuel coupons to get x-BLUE RIDGE MODELS^ us to Austria. Nowhere in Czechoslovakia 80X 429. SKYLAND. N. C. 28776 do you, as a foreigner, drive into a station of 55 inches. See the Eagle II at your nearest and say, "fill 'er up." channel R/C sailplane with a high-start hobby shop, or for more information, con­ We reminisced on the 26th. . .let me launching system included. Aerodynamic tact Cox Hobbies, 1525 E. Warner Ave., share some exciting fun moments with stability is assured by the new computer- Santa Ana, California 92705. Be sure to let you. . . my name has been Stuartu Rich­ design technique with optimum Reynolds them know you read about it in Model mond; my wife has been Lynn Richmon- number used as a design criteria for best Builder. · dova. Among things I'm bringing out is a overall performance. A newly developed modeling text book from Berlin, German single-channel radio with greater selec­ R a m b lin '...... Continued from page 27 D em ocratic Republic (East Germany) tivity comes installed in the fuselage. The which is a modern day counterpart of Eagle II is constructed of smooth, low- with seven 800mah cells weighs over a Grant's famous Model Airplane Design and density polystyrene foam, with a wingspan pound, so weight looks like it could be Theory of Flight with graphs, charts,

90 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER YALE HOBBY MFG., INC. THE LEADERS IN MODEL AIRFOIL TECHNOLOGY Tru-Spin Wins 1986 Nats! All laminated blades are made of maple and a softwood. Main Λ1st Place FAI—Curtis Youngblood and tail blades are matched by weight, drilled and packaged w ith covering material. Our blades come with a "money back TRU-SPIN REPLACEMENT M AIN AND TAIL BLADES guarantee" or replacement of the item against manufacturing ^ NEW & IMPROVED S tock # defects. 1017 Jet Ranger Main Blades. Laminated*...... $18 95 1001 Competitor Main Blades—28". Laminated...... 15.15 1002 Custom Competitor Main Blades—25", Lam inated*...... 16.90 1003 Competitor Tail Blades. Lam inated...... 3.85 1004 Cricket Mam Blades...... 7.95 1005 Cncket Tail Blades...... 3.25 I029A Cobra Custom Mam Blades, Laminated*—NEW ...... 16.90 YALE HOBBY MANUFACTURING, INC. 1029 Cobra Main Blades. Lam inated...... 13.95 1030 Cobra Tail Blades. Laminated...... 3.85 20 Holly Lane. Wallingford. CT 06492 1006 Superior Main Blades. Laminated* ...... 17.95 |203) 265-4185 1007 Superior Tail Blades. Laminated...... 4.00 1008 Heliboy Mam Blades. Laminated...... 13.25 N E W H E A T YALE VACU-FORM 1010 Heliboy Tail Blades. Lam inated...... 4 00 SHRINK COLORS PLASTIC CANOPIES 1009 Super Miniboy Main Blades— 18". Laminated...... 12.25 S to c k # Stock # Replacements for: 10I9A Miniboy Main Blades—Comp Airfoil, Lam.I bVie...... 12.25 1082 Large— R e d ...... $2.20 1071 Competitor__ ... $12.59 I0I9B Miniboy Main Blades—Comp. Airfoil. Lam 18 "...... 12.25 1083 Large— B lu e ...... 2.20 1072 Cobra...... ___12.59 1020 M iniboy Main Blades— Ιό Ά . Lam inated...... 12.25 1084 Large—Yellow ...... 2.20 1073 Cricket...... 12.59 1011 Miniboy Tail Blades. Laminated...... 3.95 1085 M ed iu m — R e d ...... 1.85 1074 Shuttle...... ___12.59 1028 Star Ranger Mam Blades*...... 20.95 1086 M ed ium — Blue ...... 1.85 1075 Superior...... 20.95 1031 Star Ranger Tail Blades...... 4,00 1087 Medium—Yellow ___ . 1.85 1076 H eliboy...... 12.59 1012 Baron-60 Mam Blades. Laminated*...... 15.09 1088 M ed ./S m — Red...... 1.65 1077 M iniboy...... ___12.59 1013 Baron-50 Mam Blades. Laminated*...... 14.09 1089 Med./Sm.—Blue ...... 1.65 1078 H elistar...... 19.95 1015 Baron-50 & 60 Tail Blades. Laminated...... 3.85 1090 Med./Sm—Yel...... 1.65 1079 C ham pion___ . . . . 19.95 1014 Baron-20 Mam Blades. New Improved Airfoil...... 7.95 1091 Small— R e d ...... 7 5 1080 Baron-50...... ___12 59 1016 Baron-20 Tail Blades, Laminated...... 3.50 1092 Small— B lu e ...... 7 5 1081 Baron-20...... 12.59 1018 Mantis-40 Mam Blades, Fixed Pitch...... 10.95 1093 Small—Yellow ...... 7 5 1021 Super Mantis Main Blades. Lam inated...... 13.25 1094 Super Sm — Red ...... 7 0 YALE FIBERGLASS 1052 Eagle Custom Main Blades. Laminated* ...... 17.20 1095 Super Sm.— Blue ...... 7 0 CANOPIES 1053 Eagle Tail Blades. Laminated...... 3.85 1096 Super Sm.— Yel...... 7 0 S tock # 1058 Helistar Main Blades*...... 17.95 1032 C om petitor...... $25.95 1059 Helistar Tail Blades...... 4.00 YALE REPLACEMENT 1034 Cricket ...... 2 4 95 1067 Champion Main Blades...... 20 95 M AIN SHAFTS 1033 C obra...... 25.25 1068 Champion Tail Blades...... 4.00 S to c k # 1035 Superior...... 45.95 1069 Shuttle Main Blades...... 8 95 1043 C ric k e t...... $6.50 1051 Helistar...... 4 4 95 1070 Shuttle Tail Blades...... 3.50 1045 C o b ra ...... 8.75 1044 C o m p e tito r...... 8.75 1036 Heliboy...... 27.95 'Blades come with machined, wooden blade holders and bushings 1037 M in ib o y...... 25.75 Blade holders attached please add $3.00 per set Add $3.00 per set to 1046 Heliboy...... 11.95 route slots for YALEWEIGHT 1048 Superior...... 13.25 1038 Baron-50...... 25.95 1039 Baron-20...... 1047 M in ib o y ...... 12.50 ...2 4 95 YALE ACCESSORIES 1049 B a ro n -5 0 ...... 7.00 1066 Reinforcement Brackets for Lower F ram e...... $6.00 1050 B a ro n -2 0...... 5.10 1054 Yaleweight K it...... 4 25 1064 Two Pound Yaleweight Kit...... 27.00 HEAT SHRINK COVERING 1065 Eagle Blade Holder K it...... 6.00 1022 Fits Superior Blades— Black/60"...... $2.20 1055 Competitor Blade Holder K it ...... 6.00 1023 Fits Superior Blades—W h ite /6 0 "...... 2.20 1056 Superior Blade Holder K it...... 6.00 1024 Fits Competitor/Heliboy Bids—B lk/60"...... 1.85 1057 Baron 50 & 60 Blade Holder K it...... 6.00 1025 Fits Competitor/Heliboy Bids—W ht/60"___ 1.85 1060 Quilted Blade Covers Fit C om p/C obra**...... 19.95 I024MS1024MS Fits Cricket/Baron-20 Bids—B lk/40"...... 165 1061 Ouilted Blade Covers Fit Sup/H eliboy**...... 19.95 I025MS1025MS Fits Cricket/Baron-20 Bids—W ht/40"...... 1.65 1062 Quilted Blade Covers Fit Baron 50 & 6 0 * * ...... 19.95 1026 Tail Blades—Black/l 2 " ...... 75 1063 Quilted Blade Covers Fit Cricket/Baron-28* * ...... 19.95 1027 Tail Blades—White/12 "...... 75 * 'Q uilted covers are to protect your TRU-SPIN ROTOR BLADES when 1026SS Fits Cricket Tail Blades—B la ck/8 "...... 70 helicopter is not in use Quilted covers come as a complete set for mains and tails. I027SS Fits Cricket Tail Blades—W hite/8"...... 70 SHIPPING AND C O D CHARGES EXTRAI MASTERCARD & VISA ACCEPTED' Tips are guaranteed not to round off—send S2.50 for return shipping. 1097 Wrench— 3 m m ...... SI 1.95 Call our INSTANT 1098 Wrench—2'Amm...... 11.95 SHIPMENT HOT LINE at 1099 Wrench—2 m m ...... 11.95 1100 Wrench— I V iw m ...... 11.95 (203) 265-0408 1101 Mixing Arms |Com p./Cobra)...... 24 95 SEND SI.00 FOR PRICE LIST 13.95 1102 Training Gear—28 size...... Dealer Inquiries Invitedl 1103 Training Gear— 40/60 size...... 14.95 British or American. . . nobody seemed to care. Since I was now the band leader, I UNIVERSAL IN-COWL AIRCRAFT MUFFLERS tried and tried to get them to play the tune fo r .1 9 -4 0 .4 5 -.6 0 75-1.3 engines for my alma mater that goes w ith "I'm a ram­ • Most versatile mufflers ever offered blin' wreck from Georgia Tech and a hel­ luva engineer." (Now you see where the title • Designed to fit inside cowls with limited space, for this series comes from). If we hadn't c a n also b e used o n HELICOPTERS o r BOATS bought them that big bottle of red wine, • For UPRIGHT, INVERTED or SIDE m o u n te d engines they may have made it. . .but they kept picking up what sounded like the music to • Exhaust tubes point to almost any direction "Lili Marlene," which was a Nazi marching • Worm drive clamp for universal mounting song and is and forever w ill be banned and illegal to play in Czechoslovakia, I'm told! UPRIOHT or INVIRTID or can be bolted directly to the engine INOINE •ASIC DIMSNSIONS Anyhow, after the third 90 cent expenditure f «roust tubes net mown JT-401 Y9-AO 1 6 0 0 INCLUDES: Exhaust pipe extensions with clomps. it was closing time. . .everybody left, but JT-401 AS-AO 1700 JT-901 75-13 WOO worm drive clomp, muffler alignment "Π we couldn't find our way home! • TubMoom to -men plate, gasket and mounting screws ' l l on rwwWJ en yie or And please remember, all this fun and ad­ •*mn umq on boon venture happened through model airplanes and a chance meeting at a model trade show. 4&6Q The evening before we drove out to Aus­ 7»U tria our hotel dining room was near empty IMVIITIO INOINI U**10MI/II0f/INVI*TID UfBIOMT,HO I INO j ie w feOO JT-40S » tO MOO .•’404 W 40 WOC *-*06 W-40 WOO as we ate. Arne's Mercedes, by this time, f-4C3 JCrtCCOO A 403 46 βΟ σΟΟ A«C>* 46iC UOO A406 4HOUOO H 003 » U WOO f l 903 ISU WOO js«o4 jms woo A«0 6 »ts woo was almost conspicuous. . .we probably •cent·»!»'·"κ» IVOAI to Kiccwnes ■yM Kj»C*«*OAn m m m £ m m were too. We had a friend with us for din­ ner, and the friend identified a lone diner in If not avatoOie at ycxx hobby shop. ORDER DIRECT for 164 School St. ImfnedkTte shipment Check. MO. Vha MC or COO Daly City, CA 94014 the far corner as the chief of the secret occepted Add $250 for UPS, $200 for COD and 6 \ police in the area. In walks another man soles tax for C c 0 re s id e n t FREE CATALOG (415) 756-3400 who is identified as the retired head of police for the whole area. Our pulses raced Iveta Patrman. We saw Arne change a flat to 20,000 rpm although we think we've tire in two minutes flat near a Russian Army done nothing wrong. Why are they here? camp. Arne and I got "smashed" in a wor­ They talk quietly, and we swallow with diffi­ kingman's bar on 12 cents a pitcher of draft culty. Indigestion is imminent. After 10-15 beer. I bought a pair of summer-weight minutes they both get up and leave. We idle shoes with Velcro fasteners. My United back to 1850 rpm, pay our bill, and get the States Postal Service cap, with a nice long hell out. During the 15 days, we saw R/C fly­ visor was left with Jiri Patrman. An "Arne- ing once, on a Sunday, at the end of the lon­ ism" sez it's better to be rich and healthy gest real airplane runway I've ever seen in than poor and feeble. We find a Skoda car my life. showroom, and want to go in to look and Remember I was awarded a bronze touch and raise the hood (bonnet), but friendship medal and a diploma of atten­ there's a policeman standing in there and dance at a U-Control championship meet, we don't want to interface, but we can see a and I told you they'd turn out to be diplo­ new Skoda costs about 10 years' wages! Fre­ matically important? We go to our hotel quently we got slightly lost while driving. rooms upstairs, but Arne tells me to be sure One time Arne stops and asks a pretty and wear the medal in the morning, and young thing in his best Czech, "Where are have the diploma handy, we w ill be driving we?" She shrugs and replies she doesn't out of Czechoslovakia very early on the know. Arne hollers out in straight English 15th day and heading to Austria and the Hir- with Swedish accent. . ."If you don't know tenberger Products factory, where we have where we are, how in hell do you expect us an afternoon appointment to see how the to know where we are?" Lynn and I roar world-famous HP model airplane engines with laughter at the frustration and com­ are made. It's a great manufacturing opera­ ment. Another time while thoroughly lost, tion and I think you'll like the many pictures it became quite apparent we were passing a in the next section of "Ramblin' Through Russian ICBM installation. Europe." · Then there's the night in Babylon when we walked a short distance through the woods and along a path from our hotel to Hannan...... Continued from page 57 the "Hunters' Hut" which is a bar/lounge/dance hall with a live band. If ments will employ modern ultralight en­ you like the music to "Roll Out the Barrel," gines, however eventually a reproduction of that's typical Czech folk music; you'd love a Whitehead unit is scheduled to be con­ the evening. We loved it! It's gay, rollicking structed. music and we ordered a bottle (Imperial Bill O'Dwyer, a former Air Force instruc­ quart) of Russian champagne for the three tor, B-24 and B-17 pilot, emphasizes that he of us and a big bottle of red wine for the and his group are not trying to detract from photos, drawings, upper/lower airfoil coor­ band. The champagne cost about 90 cents. the work of the Wright brothers, but merely dinates, thermal theory, slope soaring, Sometime during the second 90 cent ex­ seeking rightful recognition for another balsa structures, prop carving, and more penditure I learned to lead the band, and creative individual who worked so dili­ printed as Theory and Practice of Model Lynn was dancing with the nice young fel­ gently in helping solve the mysteries of Flying. I have a watercolor artwork by nine- lows at the next table who were about the aviation. year-old Kamil Jindrich of the country's fa­ ages of our three sons. Sometime during the FAREWELL mous L-39 jet military aircraft. We have a third 90 cent expenditure it was fairly obvi­ Al Mooney, founder of the Mooney Air­ Christmas caroling scene by 13-year-old ous that I was NOT a Czech but was either craft Company, is no longer among us.

92 MODEL BUILDER Well-known for the design of such classics as the Eaglerock biplanes, the Culver Cadet NOW!! and his extremely efficient lightplanes, Mooney had also worked for Lockheed- FROM Georgia for many years. The modeling world also lost two impor­ BEEMER-MULTIPLEX tant contributors recently, with the deaths of Gertrude Guillow and Joe Ott. According to the July Hobby Merchandiser, Mrs. G uil­ INTRODUCING low, widow of Paul K. Guillow, served as THE president of the Guillow Model Airplane company until her retirement in 1977. Joe Ott, much-admired model aircraft COMMANDER designer and kit manufacturer, passed away PPM-PCM R/C SYSTEM during June, according to theAMA publica­ tion Cloud 9. We shall miss them all. 9 CHANNEL DUAL UNUSUAL AIRCRAFT CONVERSION NARROW Bill Young is expanding his line of scale BAND PCM-D5 RECEIVER. drawings and photos. We're viewed sample drawings including the Stephen's Akro (Bill THE SAME DEPENDABLE won a recent R/C electric power meet with GERMAN HI TECH QUALITY a smoke-trailing version of this), a Culver Dart drawn by Carlo Godel, the Northrop AS THE WORLD RENOWNED N9M-A flying wing, the Northrop JB-1 ROYAL MC EXPERT "Bat," and the Granger Archaeopteryx, fly­ ing wing. Bill's photos include such rare birds as the Ford Flivver and Pitcairn PCA-2 THE NEW COMMANDER Autogiro, and are top-quality prints ideal for proof-of-scale purposes. Why not drop a • SERVO REVERSING. stamped, pre-addressed envelope for a • THROW REDUCTION ON ELEVATOR complete listing? Bill Young, 8106 Teesdale & AILERONS. Ave., N. Hollywood, California 91605. • EXPANDABLE TO SEVEN DAEDALUS DOINGS CHANNELS BY USER George Ardwin forwarded more details • MIXERS PROVIDED IN THE regarding the Massachusetts Institute of ALLROUND AND HELI EXTENSION Technology scheme to fly a human-pow­ MODULE. ered aircraft from the island of Crete in the • PCM OR PPM FROM FRONT OF Mediterranean to the Greek mainland, a TRANSMITTER. distance of 69 miles. The proposed craft w ill have a 102 foot wingspread and weigh • VERY USER FRIENDLY. kind of day right after the first CNN (Cable about 68 pounds. The flight is expected to • USER EXPANDABLE (HOWEVER News Network) phone call concerning the require more than four hours, and among OUR V.I.P. SERVICE WILL DO FOR Testor F-19 Stealth. Seems a story about our the potential pilot/engine candidates tested YOU AT MODEST COSTS.) Stealth fighter written by a Dayton, Ohio thus far, a girl has demonstrated the best journalist had crossed the AP (Associated athletic duration. PRICED FOR THOSE Press) wires and attracted some attention. A year's study of the problems involved, WHO CANNOT AFFORD A "Shortly after that phone call, a local TV funded by the Smithsonian Institute and MERCEDES BUT COULD station just appeared. . .at our front door MIT, is expected to cost $74,000. Construc­ CONSIDER THE BMW tion and testing of a prototype aircraft will . . .with cameras and lights in hand! They wanted a scoop. require at least another $99,000, to be do­ SEND FOR NEW nated by Anheuser Busch, and the actual "O f course we were more than delighted ENGLISH COLOR project vehicle and associated expenses to oblige. Even though they didn't uncover CATALOG may account for another $195,000. Addi­ the story they were hoping to find about 'leaks' or secret documents, the reporters OR tional sponsors are being solicited. . . . CALL US STEALTH MODEL STEALS SPOTLIGHT were fascinated with the model and pro­ Seldom do model airplanes attract the at­ duced a very nice piece for local broadcast. (602) 483-9577 tention of nationwide television and "As they were wrapping up, W MAQ TV newspapers, however the recent release of from Chicago called. Their big tractor- SEND $3.50 FOR CATALOG the Testor Corporation's F-19 Stealth fighter trailer 'Up-link' (for satellite transmission) plastic model kit was an exception! The was on the way. The guys from ABC Rock­ NAME remarkable publicity afforded this ford nearly fainted. This was turning into a pumpkin-seed-shaped model with a wing bigger deal than they imagined possible. platform reminiscent of the 1937 Strela, has "The 'Up-link' never made it thanks to ADDRESS created a demand that keeps the injection- late-breaking news, but our John Dewey molding machines running 24 hours per traveled to Chicago for a story broadcast on day, 7 days a week trying to catch up with the NBC station's 5 o'clock report. CITY hobby shop orders. 'The next day, radio stations began call­ So how did this happen? With the permis­ ing. San Francisco, Denver, Philadelphia, sion of John Dewey, we have abstracted the Phoenix, Cleveland, New York, Sacramen­ STATE ZIP following from the Testor Topics newsletter: to, and on and. . . . Both KABC and KNBC "W hat a Tuesday! Tuesdays around the in Los Angeles featured Stealth on their May BEEMER R/C WEST DISTRS. office are normally uneventful. Mail is 28th evening news. No major market was 7725 E. REDFIELD RD. usually light, orders tend to trickle in after lefti uncovered. SUITE 105 weekend business has been tabulated. "th e big news, however, came from CBS. SCOTTSDALE, AZ 85250 "But this May 27,1986 Tuesday was differ­ On Wednesday June 4, 1986, Testor and (602) 483-9577 ent. We suspected it would be a different Stealth were featured on the CBS Evening

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ΈΜ MODEL BUILDER SENT YOU! 93 The TENTH ANNUAL MODEL HOBBY TRADE SHOW INDUSTRY MEMBERS ONLY — FRIDAY, JANUARY 9, 10AM-6PM GENERAL PUBLIC — SATURDAY, JANUARY 10, 10AM-6PM GENERAL PUBLIC — SUNDAY, JANUARY 11, 10AM-5PM Pasadena Center, Pasadena, California HOME OF THE FAMOUS ROSE PARADE & ROSE BOWL 300 East Green Street (Corner of Green & Marengo) Pasadena, CA 91101 SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS OF: • MODEL AIRCRAFT · MODEL ENGINES *GIANT RAFFI F I • MODEL BOATS · RADIO CONTROL SYSTEMS £ ,.,1 JV i.A n i " • MODEL CARS · MODELING ACCESSORIES *SWAP SHOP ! ADMISSION: Adults - S5.00, under 13 S3.00, under 6 - free, if with an adult Discount tickets worth 50 cents at most hobby shops within B IS T in the W CSTt 500-mile radius of Pasadena, California. STATIC DISPLAY COMPETITION IN MANY CATEGORIES SEE INDOOR R/C AIRCRAFT, BLIMP, BALLOON, CAR, AND BOAT DEMONSTRATIONS

[INTERNATIONAL MODELER SHOW OFFICE: P.O. Box 10127, Costa Mesa, CA 92627 Ph: (714) 548-4700 or 645-88301

States. The contest site was the Pelota Room Ridonownaileyi planelofty M wcondt I Dave Aromarin. Movirr f \ r * Span in mm 114 10.8 Amazing Hot-Air Balloons! in the Miami, Florida Jai-Alai Fronton, 1 Mi1U»d Wells Wee 8c* 151 16 1 • PROXY n n e s (AJ Μ Λ * A/afc, IE) Wall tvervon. IH> Carl ftedlry. (M) Dot Martin. (W) Mil­ thanks to publicity director Kevin Koffman. lard Welh. (K) Oavr Kie4e* 4Pi ft. plastic High-Flyers assemble in Curiously, the flight durations were minutes - Heater Module included - slightly less than those achieved last year, Mark Allison, of Murietta Hot Springs, Obtain fuel from hardware store -Fly prompting Contest Director "Doc" Martin California, whose Pilatus Pistachio was free or tethered - Altitudes over 1000 to conclude: . . maybe we thought we proxy flown to a first-place by Mike Arak ft possible! Eerie appearance at night! knew more about Pistachios than we really said: "I was shocked by my w in in Category $9.95 each (Reg. retail $ 14.95). Add do. They are tricky, inconsistent, and hard I especially amidst such prestigious and in­ $2.00 postage (Pa res add 6% tax) to trim, so don't build one if you have a short timidating company! I only expected to be VISA-MC-CHECK-MO. fuse. . .Pistachios are not for everyone. But listed under 'those who also entered.'" boy, what a thrill when they behave!" Mark had not constructed a scale model for The Inter-Gnats featured five divisions some 23 years, but obviously had not lost Balloons UnlimitedJnlimite Mfg. Co. this year, and results were: the knack. drvnondivoa of Eelect* Design Inc Our congratulations to the M.I.A.M.A. Category 1 event (Under 2 gmv) Sutic 2-Fllght Total Proxy-Flyer* Score Average Score club, who promise another Inter-Gnats next w 1 Mari Allnon IUSAI (A) Pilatvn Pbrtn 84 S SO 2 114 7 year. P.O. BOX8048 LariLancaster, PA 17604 l BuKh Hadland itnfUnd) IWI Sayers Mono 74 0 51.9 127.9 1 Millard Weil» (USA) Huntington 14-12 US maa61.5 127.0 SIGN-OFF 4 l»*0 Sugrmoto (Japan) ID form er Komet S92 ma*S9.2 1164 5 AJ Onther (Swm) IH) J-) Cub 828 12.6 115.4 Frank Zaic favored us with this quotation 6 Dave AionMrm (USA) Movkt fury IMJ 4S6 115 791 News with Dan Rather. There were 7 John Martin (USA) f arman Sport 482 216 720 attributed to astronomer Nicolaus Coperni­ fabulous shots of our model and interviews 8 Dave Aromrun lUSAj 6ienot V8IA1 57.9 9 0 669 cus (1473-1543): "And since a property of all Catrgory II (vent (2 ID 1 p m I with its designer, John Andrews, and John 1 N

94 MODEL BUILDER to our pilots. Unfortunately, ultralight fliers once again ★ 7 Giant Scale ...... (18 Sheets) reenforced the bad impression I have of ★ .60 Size ...... (38 Sheets) a MA them. Yeah, I know, there are some good ★ .40 Size ...... (38 Sheets) ★ Propollor Docals in W.T. only (6 guys flying those things but, quite frankly, TO Sheets-3 sizes on ea.) most of the ultralight people seem to be so ★ Kill Markings------(12 Sheets) irresponsible and inconsiderate, I get the 6 0 0 S H E E T j ★ Nomenclature Markings (3 Sizes-12 Sheets) in Black or impression that they're all related to the Ovef White copy. Hell's Angels of the late fifties and early ★ Letters and Numbers 11 (1·%2··.3" 4**· 4-13/16“ In 10 Colors)

sixties. 1 1

it Stars in 10 Colors (11 Sizes plus

We don't charge any landing or registra­ PRESSURE SENSITIVE l l • W A T E f ■H 33 ER one Sheet of Assorted Sizes) tion fee because we don't have to; our radio raffle brings in close to $1,000, and that's Major Decals pass w ith (lying colors! S ’evtd6/tccAar-e what keeps us solvent and able to extend DISTRIBUTORS INQUIRIES INVITED the courtesy of no fee to our guests. The proceeds from the raffle also allow us to af­ Call Paul Major (413)525-4110 I l l d j O ? C lC C d lS ford only ten dollar yearly dues, a control Custom decal s tor M anu tact u re r s a g=lt; I tower, new sanitary facilities, rolling the field every spring, and having it mowed NORTHEAST SCREEN GRAPHICS 21 FISHER AVE . EAST LONGMEA00W ΜΑ 01021 TEL 413 525-4110 every week throughout the grass-growing season. of Nick's that not been kitted yet. Hangar And even if we weren't touting raffle One can handle that, too. control tickets, we'd still make an effort to get as Although he thoroughly enjoys test-flying many people out there as possible...be­ all kit prototypes, Tom confessed, "the DR-1 cause a fly-in is very much a spectator sport, is the most fun airplane I have owned." horns and you've gotta have that interaction be­ But not every bird he builds ends up be­ For your 1/6-1/4 scale model airplane. tween pilots and onlookers to make it click. ing kitted, a good example here being his A- Only two birds pranged that week­ 36 Apache. According to Tom, "it would Chrome-brite plated nylon: 1 pkg end...and neither was due to radio prob­ cost too much to kit, but it is a fine flying (2 horns & mtg lems or interference. The hot weather ad­ machine...and contrary to what many peo­ hardware) only $3.00 Unplated colored versely affected their airfoil, propeller and ple think, it's nota P-51." This particular pro­ nylon (Blue, Yellow, engine efficiency, literally putting them totype spans 107 inches, weight 36 pounds, Orange, Red, White, Black, or Gray): 1 "behind the power curve.'' Fortunately, has Annco retracts, and does well with a 3.7 pkg only $2.00 neither aircraft was badly damaged. Sachs-Dolmar up front. or match 5-9 pkgs take Even though we've always marked the So, if the lack of time precludes you from 10$, 10 pkgs or more take 30$. Please include 75c postage & routes to our field with the traditional paper scratchbuildingone of Ziroli's biggies, Han­ handling on all orders. plates tacked to trees and/or posts every gar One Hobby can probably help you get DP PRECISION MOLDING DEPT. F mile or so, this year we also put a 3- x 4-foot your dream machine flying. Give 'em a P.0. BOX 20639 · COLUMBUS. OH. 43220 A-frame sign (you know the kind...like buzz; they're good guys! many markets have out front to tell about QUADRAS upgrade your aging Q-35 to a Q-40 series their specials) on the main road so pilots The Quadra people are on the move with engine. The instruction sheet says: would know where to turn. And it paid off! a hot Q-40, a hot Q-65, a Q- retrofit oppor­ "Converting the Q-35 to a Q-40 series is Not only did this sign help incoming fliers tunity for older Q-35s, and a one year made extremely easy with the simple ex­ and spectators to find us, but it also brought warranty. change of the Power Head or short block, in a lot of "walk-ins." There must be untold older Quadras out onto which one needs only install the igni­ And our 120 percent effort paid off, be­ there, and many have probably been sitting tion and carburetion components from the cause the scattered few complaints we did on a shelf fora while...so, here's a chance to original engine. The procedures are hear were about the lack of clouds, and w ithin the next two weeks we received a \ dozen letters from folks who'd been specta­ tors, thanking us for our hospitality and the SILENT^ SPARK * great time they'd had. Can't think of a better way to get your cockles warmed! "ENGINEERED FOR COMPETITION" AL D/EM Since we were rewarded with such good Get maximum performance from your 4-cycle engines. Our new strokes, I strongly suspect that there's gonna "S IL E N T SPA R K " ignition system has features to make your single or be a unanimous vote to start planning for twin 4-cycle powerplant even more enjoyable! our 5th Annual BIG Bird Bash. . .imm e­ A uniquely designed high-energy ignition pack that offers: diately. • REDUCED RADIO INTERFERENCE HANGAR ONE HOBBY • GREATER RELIABILITY I guess because their advertising budget • INCREASED PERFORMANCE is kinda small, quarter-scale kit manufac­ • REVERSE CHARGE PROTECTION (RCP*) turer Hangar One Hobby, 1402 Madison •SMALL SIZE, LIGHT WEIGHT Avenue, Montgomery, Alabama 36107, CD-1 (One cylinder) .. S79.95 CD-1A (CD-1 with built-in RCP" NiCd pack . . $104.95 (205) 262-8235, isn't too well know n.. . CD-2 (Twin cylinder) . . $99.95 CD-2A (CD-2 with built-in RCP* NiCd pack .. $124.95 which is a darned shame because they turn BP-1 (NiCd pack with RCP*, 4.8v, 500 mal . . $24.95 out quality stuff. BP-2 (NiCd pack with RCP*, 4.8v, 800 ma] . . $36.95 I couldn't fault their work two years ago and, after looking over a Bearcat kit yester­ •R C P *: (Reverse Charge Protection) insures no cell damage if switch is le ft on and pack runs down completely. It allows safe battery deep discharge cycling for maxi­ day, I found that quality still is Hangar One mum charge capacity. honcho Tom Wilkinson's top priority. They specialize in making kits for many Write or call for descriptive literature and product listing, $1.00 of Nick Ziroli's plans...so, if you've been (deductible from first order). turned on by, say, the Bearcat, P-40, or Fok- ker DR-1, but don't have the time to scratch- TRAN-SIL Products Inc. build, then you should get in touch with 200 So. Orchard Dr., North Salt Lake, UT 84054 Ph. (801) 298-7254 Tom. And if your druthers are for something NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 95 "We mold the hom in any of seven differ­ ent colors (blue, yellow, orange, red, white, black, or gray). You may notice that our yel­ low matches the Cub yellow used on quar­ ter scale J-3s. O ur colors were chosen to compliment the most popular model color schemes. New and exciting 2 channel sport "We also manufacture horns with a PT-19 R/C TRAINER and scale, electric and fuel chrome-looking metal plate. These are de­ powered aircraft from Cox signed specifically for those of us who Hobbies! show our planes. As you can see from your Check out the nostalgic R/C samples, this is not a 'chrome paint.' Each PT-19 (with new 'Ranger' engine) part is placed in a vacuum chamber and and the sporty R/C Cessna aluminum is vaporized onto the prepared Skylane. nylon surface. The part is then dipped in a For easy, relaxing, quiet flight, tough polyurethane topcoat. This is to pro­ the Cox Canario (complete with tect the aluminum plating. By the way, this charger and battery) is the bird is the same process used to plate parts in COX CANARIO for you! Try one today. plastic model kits, and is called Vacuum See the complete line of Cox powered Metalizing." models and accessories at your I just received the horns this morning so I Hobby retailer today ... haven't had a chance to use them yet...but I Enclose $1.00 with SASE for your certainly like what I see. They've definitely mini-catalog! got more "beef" than standard horns, yet don't have that "obese" look about them. I COX HOBBIES also like having a choice of colors, espe­ CESSNA 1525 E. Warner Ave. cially when these colors won't wear or chip Santa Ana, CA 92705 SKYLANE off. WARTHOG CAMOUFLAGE straightforward and only a few simple hand Quadra Aero Engines, P.O. Box 958, Ux­ Hobbypoxy has just come out with for­ tools are required." b rid g e , O n ta rio , Canada L0C 1K0, mulas for "European One," the three-color I read over the eight-step conversion, and (416) 852-3500. scheme used primarily on the Fairchild A-10 if you're reading this then you shouldn't COLORED HEAVY-DUTY CONTROL "Warthog" Thunderbolts operating in Eu­ have any problems with the upgrade. And HORNS rope and have also included some interest­ you can have the ignition your way...either Have to admit that I'd never heard of DP ing background info from "U.S.A.F.E., A points or capacitive discharge. Precision Molding (Dept. C, P.O. Box Primer of Modern A ir Combat in Europe," According to one of Quadra's charts, the 20639, Columbus, Ohio 43220) before, but by Michael Skinner. Q-40 puts out 2.8 hp at 9,000 rpm com­ couldn't help being impressed with their 'The aircraft's camouflage scheme is an­ pared to the Q-35's 2.3 hp at the same rpm. different colored heavy-duty control horns. other example of the designers devoted to Unfortunately, Quadra, like most other en­ Here's what DP's Dean Poeth, II, told me: making everything exactly right. They gine manufacturers, doesn't tell you what The horns are molded from 6-6 nylon, started from scratch; after all, the USAF had size props they used to obtain those 9,000 and each horn comes with four stainless no experience in painting battlefield jets. readings, and I suspect that neither were a steel Phillips head bolts. These bolts self 'Their first efforts were shades of gray, practical size. However, the .5 hp edge the thread into the horn base providing an an­ dozens of them. These worked well in the­ Q-40 has should make your BIG Bird more tivibration mounting. The bolt heads ory, but in practice the pale A-10 'sausage' nimble. mount up to give the installation a neater stood out prominently against the thick For pricing and more specs, contact: appearance. green forests of central Europe. The design­ ers went back to the drawing boards and came up with the mottled green and gray BERT BAKER S Scale Flight Models European One, the 'Lizard' camouflage 3326 121st PLACE S.E. now on the aircraft. 'The A-10 was also one of the first aircraft EVERETT, WA 98204 to have its red, white, and blue national in­ signia replaced with the new low-visibility black outline, the current standard." And here are the European One formulas (remember to use H 0 5 Flat Hardener): FS 34102 Light Green 4 parts H65 Bright Red 3 parts H49 Cub Yellow 3 parts H81 Black 2 parts H33 Stinson Green 1 part H70 Gray 1 part H10 W hite FS 34092 Dark Green 4 parts H33 Stinson Green 4 parts H81 Black SUPER 80”Span, 1/6 Scale P-47D Bubble Top or Razorback 3 parts H47 Bright Yellow DELUXE 80’iSpan, 1/5 Scale A6M5 or 3 Zero 2 parts H70 Gray KITS Both designed for 1.5 cu. in. and up engines FS 36081 Dark Gray Kits include: · Epoxy glass fuselage and cowl 6 parts H81 Black • Formed Canopy · Foam Core Wings $235 ea 5 parts H70 Gray • Foam Core Tail · All Wood and Skins 1 part H47 Bright Yellow • Control Horns · Instruction Booklet INCLUDES SHIPPING 1 part H66 Dark Red Call 206-337-0868 for more information UPS N US- FS 37038 Black (Markings) Hobbypoxy H81 Black

96 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER PAT 4J?M52 ‘HEAD lock” remote c Copyright 1977 MPC All rights reserved This product is designed for use on cowled engines, helicopters, boats, cars and general safety by removing the glow plug con­ nector from close proximity to the whirling propeller The "REMOTE" unit consists of a miniature "HEAD LOCK" connector and a remote jack that are electrically coupled by 12 inches of odels to fit teflon insulated wire and a 12 inch ground lead A bracket is sup­ M plied with the jack for convenient mounting. The "JACK" is com­ HEAD LOCK patible with all "HEAD LOCK" connectors. ENYA & O.S. 4Str. Rtno ti C trntcUr SIN GLE CYL. $7.95, ENYA SPECIAL $9.95, TWO CYL. $11.95 & All Std. Plugs MODEL PRODUCTS CORP. BOX 314. Pompfon Plains. N.J. 07444 n not available wnto direct add si oo (S2 oo outside US)

Now you're all set to do a Warthog, or any Orwick) 1802 other warbird that's operating in Europe. In 4. Steve Boucher (MG) 1731 fact, this mottled camouflage would proba­ 5. Buck Zehr 1671 bly look just as good on any scale-like bird ANTIQUE CLOW (28) where you're not concerned with 1. Bruce Norman (Bomber/ documenting the paint scheme. ST 60) 2097 COROLLARY OF THE MONTH 2. Joe Percy (RC-1/ST60) 1989 If a cluttered workbench is the sign of a 3. Ralph Turner (MG/HP40) 1743 cluttered mind, what does a empty work­ 4. M. Granieri (MG/ST60) 1435 bench suggest? 5. H. Layser 1420 Al Alman, 605 168th Street, East, #95, ELECTRIC .050 Spanaway, Washington 98387, (206) 535- 1. Fred Koval (Playboy) 420 1549. It's just about the building season for 2. E. Thomas 380 most of us, so get next years project planned 3. A. Sheppard 243 well and go to it...and please be careful ANALYSIS OF THE MEET while using those tools. Pain hurts! FLYING Although the meet was a resounding suc­ SAFETY IS NO ACCIDENT! · cess with 180 contestants, the financial bur­ den was apparently carried (again) by the Plug S parks.. Continued form page 40 radio control boys as entries were 277 as compared to the free flight entries of 296. The latter, of course, does not include the age of 25.18 entries per event. 4. Bob Whiter (Bomber) 1461 mass flyoffs of the Twin Pusher and R.O.G. The sad part on behalf of the R/C contin­ 5. C. Thuet 1197 Events. gent, was that someone, in procuring the CLASS C IGNITION (28) Based on 28 events (not counting the trophies, failed to remember that the R/C 1. Art W hite (Bomber/ mass launch events) for Free Flight, this Events were voted in as Basic Events three or Hornet 60) 2089 breaks down to 10.57 entries per event four years ago. This meant only three 2. Bruce Norman (Bomber/Ohlsson) 2039 trophies instead of five were available for 3. Bob Walter (Bomber/ while the R/C events (only 11) show an aver­ Forster 35) 1993 4. Jim Reynolds 1642 WILLIAMS A CQOT? TT7 C 5. Buck Zehr (Sailplane/ Hassad) 1581 BROTHERS CLASS A GLOW (25) 1. Bill Schmidt (Playboy/KB 19) 1260 2. Jack Ross (Bomber) 1256 < PILOTS STANDARD · SPORTSMAN 3. Bruce Norman (Kerswap/ST 19) 1252 RACING · MILITARY 4. Buck Zehr 1223 5. Joe Percy (Bomber) 1187 WHEELS ► VINTAGE · SMOOTH CONTOUR CLASS B CLOW (29) BALLOON · GOLDEN AGE 1. Art Peterse (Swoose/K & 29)1479 2. EutTileston (Lanzo/Enya 40) 1442 3. Bruce Norman (Bomber/OR 29)1429 ASSa - i ENGINES A W / 0 PRATT & WHITNEY · WRIGHT · IE RHONE 4. Ralph Turner 1404 5. Joe Percy (Bomber) 1176 CLASS C CLOW (35) ]?ARTS>1 1. Jim Reynolds ( /ST35) 1794 PRATTDATT™ £ &β WHITNEYVA/UITkICV -· IE1C RHONEOUAkl C 2. Ralph Turner (MG/HP40) 1623 WRIGHT · GNOME 3. Joe Percy (Bomber/ST 35) 1556 4. EutTileston (Lancer/OS 40) 1502 5. Bruce Norman (Bomber/OR 60)1425 —GUNSJ ANTIQUE, IGNITION (21) 1. Bill Schmidt (Bomber/ McCoy 60) 2496 LEWIS · VICKERS · SPANDAU · PARABELLUM 2. R. Thompson (Bomber/ SEND S2 FOR FULLY ILLUSTRATED CATALOG ^ H '/’ Ii f v U uL A a X M OR 60) 2060 DEPT. MB 181 PAWNEE ST SAN MARCOS. CALIFORNIA 92069 WPS 3. Jim Reynolds (Cumulus/

NOVEMBER 1986 97 Many of the competition-minded boys say this makes Texaco a luck event, but you can't argue the point this type of meet The Model Aviation Historical Society would draw over 100 contestants for one series o f historical model aircraft engine reproductions event! Joe Beshar, R/C Contest Director, always a stickler for the printed rules, stated the w in­ the Bantam .19 the M-5 ner of the Texaco Event was based on the to­ tal of two flights. Just the thing we wanted to

Fire handcrafted spark avoid as it would take all day plus half the plugs with hi-ten

98 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER accepted diesel design and converting it to a glow plug operation. Having a bore of 0.5 in. and a stroke of 0.55 in., this gave a displacement of 1.75 cc (0.10 cu. in.). At the time of introduction, the 175 was the smallest glow plug engine in a production status. Price was announced as 70 shillings complete with coil and con­ denser, plus propeller (the British call it an airscrew), a not unreasonable price at ap­ proximately 15 dollars American. Hoping to take advantage of the small plane market, the FROG people also offered a casting kit known as the FROG 45 for those who liked to do their own work and save money at the same time. By the end of 1948 it was fairly obvious the competition had caught up and passed the FROG engine for performance and Steerable Nose Gear price. Noted in the April 1949 issue of Aero- V2A Steerable Nose Gear Quality, shock absorbing nose gear Vu " modeller was a special announcement by VK" nose gear wire. Small, lightweight and heavy duty wire Complete with nylon Henry J. Nichols offering the FROG 175 at easy to install Complete with mounting nose gear blocks and steering arm screws No. 152 Bent No. 153 Straight reduced prices to sell off the unsold lot No. 234 1/set No. 154 Nose gear wire only - no blocks presently in stock at the factory. The engine had a rather short-lived manufacturing history. The engine had quite a few good features such as a non-spill breather-filler cap, detachable cylinder head, an updraft intake and rotary valve, lever control for the fuel regulating valve plus a special plug for Steering Arm Assembly clearing the jet. The lever valve could be Nylon Steering Arm 1V«“ Steering Arm Assembly. Nylon used to shut off the engine for free flight 1 V„" nose gear wire attaches to arm steering arm with brass bushing and set Hardened socket head screw passes screw tits Vj," nose gear wire. Snap on E-Z operation (most early 1945-48 engines in­ through a heavy brass bushing connector included corporated a feature similar to this setup.) No. 166 1/set No. 155 1/set The FROG 175 could be operated either upright or inverted with no problem other than reversing the locations of the filler cap and the fuel outlet fitting. Running weight of the 175 was six ounces. Performance Steel Landing Nylon Landing figures with a nine-inch propeller gave Gear Straps Gear Straps 6,000 rpm and static thrust output of 0.75 These strong nylon straps are molded to lbs. Made ot steel — light and strong Includes lit ’/,'■ and 7B" music wire The FROG 175 came complete with an 4 straps and 8 screws No. 238 V," 4/sets integral fuel tank, a feature started by No. 158 4/pkg No. 239 VK" 4/sets Colonel C.E. Bowden in many of his early designs dating back to 1936. This feature was also carried in some of the American designs such as the O.K. Cub, Fox .075, etc. ANNUAL SAM BUSINESS MEETING Held at the Quality Motel (formerly The Rodeway) on July 4th at 8 p.m „ President Taibi opened the meeting by announcing Spring Steel Axle Shatts Nose Wheel Brake And two new officers, Jack Bolton as Eastern V-P, Link Hook-Up Plated brass. Bolts to any dural landing and Bob Angel as the new Western V-P. gear, easy installation. 4 sizes (length x Complete 10 pc. nose wheel brake and Inasmuch as there was no old business, diameter). linkage hookup. Features case hardened No. 246 1V." x V," 2/pkg steel brake drum and other tine quality Joe McCay submitted a proposal on behalf No. 247 1 No. 249 2" x V 2/pkg LANDING LANDING GEAR ACCESSORI ville, Illinois. This was officially accepted. Dates w ill probably be over the Fourth of July weekend. After several proposals, a motion by Eut Tileston to freeze the R/C rules for five years was passed by a vote of 31 to 11. (Ed. note: With only 42 votes participating in a mem­ bership of 1800, Pond has subsequently called fora referendum to poll the member­ Right Angle Wheel Spacer ship for approval/disapproval of the five Eliminates wheel lock up. Positions wheel Nylon Gear Blocks year freeze action. A voting sheet has been at the proper distance trom strut to keep Includes two nyion blocks, four bolts, lock issued by Sal Taibi). wheel spinning Ireely. Use with Dia washers, nuts, one nylon spacer For VM" wire wire Woodman announced twelve new SAM No. 342 3/pkg No. 156 1/set Chapters consisting of two Canadian (69 & 86), one English (1066), one Italian (62), one Australian (1788), two California chap­ DU-BRO PRODUCTS INC ters (00 & 02), one Pennsylvania chapter 4 8 0 Bonner Rd. Wauconda, IL. 6 0 0 8 4 NOVEMBER 1986 99 (66), one New York chapter (61), one Okla­ homa chapter (205), one Louisiana chapter (59), and one Florida chapter (77). Technopower’s An announcement was made that the 1987 SAM Champs would be held at Seguin AFB, Texas and run by SAM 29 and as­ sociated chapters from Houston and San NEW Antonio. The Fourth of July weekend has been selected for the contest dates. SAM CHAMPS (cont'd.) Getting back to photos (and we have a flock of them), let's look at some of the B IG B O R E characters who annually attend the Champs. Seen in Photo No. 6 is Loren Schmidt who formed the contingent of seven West Coast members at this meet. Those in attendance were Loren Schmidt, John Pond, Bill Bowen, and Eut Tileston, representing the R/C portion w hile three flew free flight: Sal Taibi, Clarenece Myer- scough, and Jack Jella. A very good show­ ing for that distance! Loren is seen w ith a Buccaneer; the origi­ nal, not the Super Buccaneer as there are significant differences in wingspan, fuselage structure, etc. This Champs had the best representation from England thanks to David Baker who organized the "safari" to the 50th Wakefield Champs at Taft and then the subsequent trek to Massachusetts. Seen in Photo No. 7 are some of the English lads, the Seales brothers, W illiam (I.) and Adam (r.) w ith a Korda Wakefield and a Lamb Climber re­ spectively. Seen in the background is the spark plug, Dave Baker. Ken Hinton of Bury St. Edmonds, Suffolk, makes a yearly habit of attending all the American SAM Champs. Ken is shown in Photo No. 18 with his winning gas-powered • 7 Cylinder • Master Rod Runs on Needle DeHavilland Gypsy Moth. Fine flyer! Ken • 4 Cycle Bearings has a son that is a real competitor in English • Overheard Valves • Rocker Boxes Are Investment Cast. SAM contests. • Glow Ignition Balance of Engine is Bar Stock More of the English group! Photo No. 8 • Displacement 2.0 cu. in. • Hardened and Ground Steel Cams depicts Reg Parham, one of the early pi­ • Red Line RPM 9000 • Hardened and Centerless Ground oneers of English modeling. Reg is 69 and • Flying RPM 8500 Valves doesn't look a day over 59!! Haw! Parham is • 6-5/8” Diameter • Weight 30-1/2 oz. holding a 1935 Gordon Light Wakefield • Hard Chrome Bore W inner that flew so well at the Fairey Aero­ FOR INFORMATION, SEND S3.00 TO • Cast Iron Piston Rings drome at that time. The design is still a fine • 14/6 -16/8 Prop Range TECHNOPOWER II INC. flyer as attested to by the numbers built! Behind that bewhiskered visage in Photo • Extra Heavy Crank Shaft 610 North Street Chagrin Falls, Ohio 44022 No. 9 is Don Knight of London holding a Supported By Ball Bearings Fred Rogerson biplane that won the Cana-, Fore and Aft MasterCard VISA’ dian Wakefield eliminations in 1935. Don • Phosphor Bronze Valve Guide reports the model flies well. Unfortunately time did not permit this writer to communi­ cate with Don about the time we went fly­ ing w ith Dave Baker north of Barnet. Nice FIVE BAGS of PEANUTS day, nice flying, nice com pany.. .what else could you want? To round out the competition on the field, we feature Photo No. 10 of Peter Michel also of England, with his excellent replica of Bob Copland's 1940 Wakefield. Pete showed the boys how Bob would have done it as he beat out Reg Parham by six seconds, winning the Wakefield rubber event. With the advent of good FAI rubber again available, the amount of entries in the rub­ ber events is no less than astonishing. Even the grand old master, Henry Struck, came out for these events. As seen in Photo No. EACH BAG FEATURES FOURTEEN PEAIIUT PLANS------SEND $1.00 FOR LISTING 4 SAHFLE PLAN. 11, Hank is holding his 1937 Wakefield de­ WALT MOONEX P.0. BOX 231192 SAN DIEGO, CALIF. 92123 sign. No, it's not the original model al-

100 MODEL BUILDER though Henry does have quite a few of his old designs stuck away in the rafters. We'll have to get him to dig up a few of those old JOHN POND designs after the success of the Cabruler and Ho-Cat. Getting away from the rubber-powered Old Time Plan Service models for a photo or so, Ed Konefes, brother of the well-known Joe Konefes, is The largest selection of plans in the world at the most quite a modeler himself. Ed built a very reasonable prices. Each list $1.00 neat-looking, original design compressed air model as seen in Photo No. 12. Ed be­ No. 16 OLD TIMER F/F GAS lieves in taking it easy as he uses a foot- No. 16 OLD TIMER RUBBER/TOWLINE actuated pump instead of the old-fashioned tire pump. Although he only placed third in No. 16 OLD TIMER FLYING SCALE A through K this event, the writer thought Ed has a very No. 16 OLD TIMER FLYING SCALE L through Z smooth flying model. However, in that New plans prices effective Dec. 1985 to Dec. 1986 wind, anything was liable to happen and generally did! P.O.Box 90310 You would never know that Jim Walston San Jose, Calif. 95109-3310 comes from the Atlanta, Georgia area as he Phone (408) 292-3382 (Tues. or Fri.) is always up north for most of the big con­ tests. Over a period of time, Jim has built up Texas. Now for a couple more items and we a stable of good flying models. The Playboy will wrap this column up. P.A.W. DIESELS Cabin seen in Photo No. 13 is a real per­ MECA "G R A N D O " COLLECTOGETHER England's Finest former with a red hot Atwood Champion Got back from a picnic in time to see the .049 to .35. R/C and Standard turning up. Not too many modelers use this end of the MECA "Grando" Collectogether engine as the rear induction tube does pre­ Si.00 FOR LISTS & USEFUL INFO after opening it up before going off to Eric Clutton sent mounting problems, but one of those Meriam Schmidt's sister party. The MECA 913 Cedar Lane Atwood Champs properly set up with the Tullahoma. TN 37388 affair was held at the Quality Motel which right prop, won't take a back seat to any made it extremely handy for all SAM other engine of that era. members. increased his stock even more. No longer One of the interesting gas model designs Met quite a few of the fellows that one will one have to hunt high and low for igni­ is the Goldberg (Comet) Interceptor. There doesn't get to see, being on the East Coast. tion timers, driver washers, etc., Woody has are actually two distinct model sizes offered Mike Cook, one of the pioneer MECA boys them in all varieties. Give him a try at Micro on the original plans. Although not built in was there with this usual swapping mate­ Model Engineering, 1301 West Lafayette, as many numbers, the five-panel wing offers rial. Woody Bartelt, who has been concen­ Sturgis, Michigan 49091. more wing area and a consequently lighter trating on producing those hard to find Also was greatly pleased to see his old wing loading. However, there is no free small items for the old ignition engines, has friend, Marty Schindler win the prize for lunch as the added wingspan makes the model more fragile, as the power of an Arden is enough to fold those thin wings. Bob Edelstein poses with this particular ver­ HAVE YOU TRIED FULL-SCALE? sion in Photo No. 14. Bob was smart enough to drop the single wheel landing YOU CAN BUILD THIS CAR YOURSELF. gear and add an extra wheel to insure smooth takeoffs in gusty weather. Would you believe it? Another good model that failed to place! We are rapidly running out of space but wanted to run a few more photos like Photo No. 15 of Bill Bell with the most popular Jimmy Allen design of all, the Bluebird. As can be noted in the results, everyone flew this design. Perhaps we should give bonus points for Jimmy Allen designs other than the Bluebird. Photo No. 16 is a decoy. Dick Sherman is seen with his neat flying Gordon Light 1935 Wakefield Winner. Dick confounded the expert by winning the Hand Launched THE BUGATTI TYPE 35R Glider event. Watch out, there is life in that old bird yet! If you want attention, this is a way to get itl Imagine the thrill of driving a vintage full-size Talking about old goats, Photo No. 17 is Bugatti from out of the nostalgic past, with an up-to-date drive train and reliable service avail­ able anywhere. Plus, high performance. 0-60 In under I0 seconds, and good mileage. the living end. Seen are Carl Hatrak in the front with Bert Pond, Micky DeAngelis, and John Pond. Yes, that is "old slim" after a nine • Finished cars available, or build it yourself. week bout with walking pneumonia. That's • Fiberglass body, steel component parts. taking off twenty pounds the hard way! The • Full choice of custom colors. model? Oh yeah, the twin pusher is August Ruggeri's World Record design of 1933-34 • Kit prices start at S 1995.00. out of New York City. We could go on and on with photos but we have to stop somewhere and simply say we (and I mean "we") all enjoyed another RUSSELL AUTO MOTIVE ENG. tremendous SAM Champs. All of us are 1411 Bullard Lane, Tustin, California 92680 · (714) 832-1409 making plans for Seguin AFB next year in

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 101 t i PLANS CATALOG r s / t r / s * ILLUSTRATED LISTING OF MODEL BUILDER PLANS

Continuotion of our complete Full-Size Plons List, with on illustration of each model listed.

See the regular Full Size Plans advertisem ent for ordering instructions and special sales.

No. 3860.T. CAVU $4.00 Cute little 44-inch span 1938 parasol No. 2863 VOYAGER $5.00 for .06 to .10 engines, by Ken Willard. No. 1861 TOSSETTE $5.00 C/L Aerobatic Stunt Champ for .40-.46- A 58-inch span R/C glider lor school- size engines. 64 " span. By Piotr Zawada. yard or slope soaring fun. Ed Depue.

No. 4861 ROOKIE II $11.75 Large, comfortable, updated R/C sport/ Να 186-0.T. BR'KL'N DODGER $5.00 trainer, 60 90 2/4-cycle. By Bill Winter. Sal Taibi's 56-inch span free flighter is No. 286 O.T. JR. ENDURANCE $2.75 still competitive in B or C class events. 1937 rubber-powered model from the Peerless Model Airplane Co. 18-in. span.

No. 3861 MICRO GIANT $5.00 Fast-moving aerobatic two-channel R/C No. 4862 CENTAURI $4.00 No. 2861 SOUARE TRAINER $6.00 for reed-valve Cox .049. Tyrone Parker. Control line profile sport/stunt twin for A 72-inch span R /C trainer designed for OB.t 0 4 9 to .06 engines. By Jim LaBarge. thebeginning R/C'er. By George Wilson. - 7 i i:/ ίτ ΊΗ Γ II I i__

K 5 H S » * Αβ

Να 2862 R/C FLOATS $3.00 No. 3862 RAPID, A/3 $3.00 No. 4860.T. STOUT WINNER 54.UU Simple to build floats for up to six-lb. Easy-to-build, one-meter span F A I free Winner o f '3 9 Stout Trophy, 41" span, airplane. Balsa and pine construction. flight towiine glider. Jaromir Jindrich. diamond-fuselage rubber, by Bob Toft.

102 Number 43 of Series MODEL BUILDER No. 5861 ELECTRIC BEAVER $5.00 A scaled-up Bostonian design for R /C Developed as standard for the 2-Meter No. 7 8 6 -O.T. KORDA D/T $4.00 electric flight. 57"span. By Steve Gray. World Cup, it's great for all. Buddy Fox. Slightly larger version of Korda's 1939 Wakefield winner, with early type D/T.

IS*

^ * SH ' ’ ---- ’ - z - 1 .

« O k * . t~* t .

t c j v ·· y • -

9 > . r , · * * % · *■ · tr . \ n No. 686-0.T. SUPER ZOMBY Ά ' $5.00 J t &

No. 5862 SAMOLOT DKD-111 $4.00 Fast climb & floating glide made it one N o . 786-C.P. MEGOW SPITFIRE $5.00 Walt Mooney's two-times Peanut Scale of best '41 designs. By Leon Shulman. A 5 0 -inch span Golden Era classic rub­ version of a Polish lightplane. 28” span. ber scale. All ribs and formers shown.

No. 7861 VIKING $4.00 No. 8861 VINDICATOR S7.50 No. 586 O.T. GULL $4.00 Sleek swept, tapered foam wing 2-ch.. Hi-tech, Cobalt 15-powered aerobatic Wakefield winner Gordon Light's 1936 R/C for TD .049. By Mike Saponara. electric. 'Glass fuse avail. Les Adams. rubber endurance ship. 4 8 " wingspan.

No. 6861 BUMBLEBEE $11.75 No. 7862 GUARDIAN MK 8 8. 9 S5.00 No. 886-O.T. SNUFFY VI $5.00 R /C Sport Scale model of an unusual Latest versions of top C/L Profile Navy Sharp pod/boomish pylon Cl. A/B gas, Czech cropduster, 6090. L. Mikulasko. • Carrier. Contest proven. By Bill Melton. 50” span, '4 0 4 1 design by Bob T o ft.

NOVEMBER 1986 Number 44 of Series 103 k COVERUP! K&S For Tubing Sturdy, high quality, rich dark green vinyl-covered binders for

fc S ! METAL C EN U «· your valued copies of MODEL Λ& ilflllll'W Ϊ I >1 BUILDER Magazine. Gold let­ Μ Μ ·ηι··ϋι·ΐ tering on spine and front cover. \ J we ill IIW»·)

Our carefully engineered line of metal products has unlimited uses in the de­ velopment of all types of projects. All of your metal needs available in one place.

ALU MINUM TUBE ΧΤΊ S H E E T M E T A L 14" * W) STOCK SIZE PRICE T U 8 E 112") STOCK SIZE PRICE NO EACH STOCK SIZE PRICE NO EACH fob 1/16 25 NO EACH 250 005 Brass 70 101 3/32 30 262 3132x2 16 1 10 251 010 Brass 1 10 ICO 264 Ϊ/ 8 30 1/8·1/4 1 20 252 015 8rass 150 103 5/32 35 266 5/32*5/16 1 30 253 032 B ia u 2 70 104 268 3/16*3/8 3/16 40 1 « 254 008 Tm 50 106 7/32 45 256 016 Alum 106 1/4 BRASS STRIPS (13n . _ _59_ _ 5 0 . JM 032 Alum 107 230 016*1/4 20 9/32 55 257 064 Alum - T § ” 231 016*1/2 30 258 Am i Brass ROUN D BRASS TUBf n r » J lZL· 232 016*1 50 25Θ 025 Copp 1/16 30 016*3/4 260 . 233 _ - i S _ 3/36 30 234 016*2 9Q BR ASS ANGLE 11 n One Binder ...... $5.95 127 1/8 171 1'6*1/8 30 235 025*1/4 25 128 5'3? 35 236 025*1/2 40 172 5/32*5/3? 50 Three Binders . . . $15.95 129 3/16 45 237 025*1 173 3/16*3 16 55 130 7/32 50 238 025*3/4 4 174 7/32*7.32 60 Five Binders .... $25.95 131 1/4 56 239 025*2 175 1/4.1/4 .65 132 9/32 60 240 032*1/4 — 30 * BRASS CHANNEL 12·» (For more than 5, include 133 5/16 66 241 032*1/2 — 50 191 1/8 55“ 134 11/32 70 242 032*1 $5.00 fo r each additional ΖΈΙ. 182 5/32 135 3/8 75 243 .032*3/4 60 183 3/16 $5 136 13132 85 244 032*2 binder.) t s t 184 7/32 137 7/16 90 245 064*1/4 70 “ 60“ 185 1 7 Ϊ ^ 138 15/32 95 246 064x1/2 Shipping: Binders shipped in U.S. 139 1/2 100 1 00 247 064*3/4 SOL! B R A S S RO D nr·» 140 17/32 T k ~ 1.05 248 064*1 020 08 by UPS only. For one binder, add 141 9/16 - i r o _ 1.10 249 064*2 160 08 142 19/32 >'32. .. 1 20 161 3/64 ______12 $ 2 2 5 F o r each additional binder·, 143 5/8 1 25 162 1/16 20 144 149 1/16 Sq. 21/32 1 40 W 163 3/32 25 add 75c. For binders shipped out­ 150 3/32 Sg C O P P E R T U B E 112 '} 164 1/6 40 151 1/8 Sq oO side U.S.. add $4.00 fo r one bind­ 117 1/16 25 166 5/32 50 152 5/32 S g 70 ΰ β 3/32 30 153 3/16 Sq 80 R O U N D P L A T E O S P R IN G W IR E er. For each additional binder, add 119 6/32 40 154 1132 S fl ...... 90 (1 21 120 1/8 .30 S1.50. For A ir M ail rates overseas, 156 1/4 Sq 137 . 032 08 SOFT BRASS FUEL TUBING 195 047 08 please inquire. _____ nan______BRASS STREAMLINE TUBE 12" 197 . < » _ . ... « 121 (Γ/8 ί .40~ ia Tsm·* r 7» 063 08 PLEASE . All payments must he in U.S. funds, drawn on a U.S. bank. Send 25 cents for catalog and price list. K&S Engineering, California residents add 6% Sales Tax 6917 W. 59th St., Chicago. Illinois 60638. Telephone: 312/ 586-8503. MODELS' BUILDER 898 W. 16th St. Newport Beach, CA 92663 SUBSCRIBE TO

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104 MODEL BUILDER INDEX TO ADVERTISERS Ace Radio C o n t r o l...... 74 RC Sw eitzer Enterprises ...... 93 Aerospace Composite Products...... 80 R/C Buyers G uide ...... 88 Airtronics, Inc...... Cover 2 R e p la T e c h ...... 98 American Jr. Aircraft Co...... 81 Indoor Model Supply...... 79 Rotary Wing Concepts...... 75 Applied Design Corp...... 81 I M S ...... 94 Russell A utoM otive Eng...... 101 Associated Electrics...... 73 Jack's Models ...... 92 RFM Design R esearch...... 76 Astro Flight Inc...... 85 Jim Crocket Replicas ...... 69 RJL Industries, USA ...... 74 Badger Airbrush Co...... 81 Jim Walston Retrieval Systems...... 72 Satellite C ity ...... 3 Balloons Unlimited Mfg. Co...... 94 J.M. Lupperger Plans ...... 84 Scale Flight M odels...... 96 Beemer R/C West Dist. Inc...... 93 Joe's Hobby C en ters...... 71 Schlueter Free Flight Models...... 87 Blue Ridge M o d e ls ...... 90 Jomar P ro d u cts...... 75 Sermos R/C Snap Connectors ...... 86 Byron Originals...... 83 John Pond O/T Plans ...... 101 Sid Morgan Vintage Plans...... 69 B&D Model Products...... 80 J 'T e c ...... 92 Sierra Nevada M odels ...... 74 California Model Im ports ...... 87 K&B M fg ...... 84 Sig Mfg. Co. Inc...... 4 Campbell Custom Kits ...... 97 K8iS E ng ineerin g...... 104 SR Batteries...... 86 Carl Goldberg M odels ...... 89 Super Cyclone Engines ...... 98 Leisure E lectronics...... 1 Champion Industries...... 84 T & D Fiberglass...... 82 Major Decals...... 95 C overite...... 79 T e c h n o p o w e r...... 100 M am m oth Scale P la n s ...... 71 Chicago Model 8i Hobby Show .... 90 Teleflite Corp...... 90 Micro Model Engineering ...... 83 Cox Hobbies ...... 96 The Helipad ...... 77 Midway Model Co...... 71 DP Precision M o ld in g ...... 95 Tran-Sil Products, Inc...... 95 M illco tt Corp...... 88 Dick Hanson Models ...... 80 Model Aviation Historical Society . . . 98 Uber Skiver Knives...... 108 Du-Bro P ro d u c ts ...... 99 Model Products Corp...... 97 W P S ...... 86 Electronic Model Systems...... 72 Model Rectifier Corp...... Cover 4 Walt Mooney Peanuts ...... 100 FA I Model S u p p ly ...... 69 McDaniel R / C ...... 69 Williams Bros...... 97 Fashion Island Investments...... 70 Northrop Flying Wing Contest...... 68 Wilshire Model C e n te r...... 75 Flyline Models, Inc...... 80 Nowlen A e r o ...... 72 World War I Aero Magazine ...... 70 Fourmost P ro du cts...... 76 Octura Models ...... 78 Yale Hobby Mfg. Inc...... 91 Fox Mfg. Co...... 77 F u ta b a ...... Cover 3 P.A.W. DieselsIEric C lutton ) ...... 101 Zenith Aviation Books...... 5 Peck-Polym ers...... 76 GM Precision Products...... 76 HOUSE ADS Pharis M o d e ls ...... 80 Gorham Model Products ...... 82 Full-Size Plans L is t...... 106 Polk's Model C raft H obbies...... 70 Illustrated Plans List ...... 102 Hartman Fiberglass R / C ...... 72 Pierce A e ro ...... 79 Model Builder Subscriptions...... 107 Hobby H o rn ...... 87 Pro-Line Mfg. Co...... 78 R/C Model Cars Subscriptions...... 104

Λ» ACCICICn ADO ,MpORTANT INSTRUCTIONS: Non-commercial VsL/\OOlriCLs AUO (personal items) rate Is 25 cents per word, PEANUT PLANS scaled from plans and with a minimum of $3.00. Commercial rate is 40 cents per word, with a minimum of model kits of the 1930's. There are over 90 $5.00. No advertising agency discounts allowed. Name and address free, phone Peanut plans to choose from. Price of our number counts as two words, abbreviations count as whole words and will be fully illustrated catalog, including postage $2 spelled out. Ail ads are payable with order, and may be for any consecutive in USA, Canada and M exico All others. $3. insertion period specified. Send ad payment to: Jim Crocket Replicas, P.O. Box 12600, Fresno, CA 92778. MODEL BUILDER, Classified Ads, 898 W. 16th, Newport Beach, CA 92663. DRAW YOUR OWN RIBS. FORMERS. Pro­ gram for HP 200 series computers Easy to use ID . .020 and Pee Wee .020 engines, parts, FOUR-INCH METAL CUTTING LATHE, Send $1.00 for details. Neil Kaminar, 28380 Big etc., .020 OT. replica kits, AM A F/F kits, R/C $104.50 Basic Unit. Taig Tools, 15048 Proctor. Basin Hwy., Boulder Creek. CA 95006. glider kits. F.X. Ryan, RT-1 Box 66. Amenia, Industry, CA 91746. N.Y. 12501 SCALE DRAWINGS of flying wings and other unique aircraft. Send $2.00 for catalog to: Bill WANTED IGNITION MODEL AIRPLANE en­ REPLICA TEXACO LOGO, 1'/«" decal, fuel- Young. 8106 Teesdale Ave. N. Hollywood. CA gines or parts circa 1930-46. Competitive prices. proof, four-color. Send $1.00/S.A.S.E. "Bobby 91605. Tom Forsythe, 31812th Ave, Box 141, New Gla­ Langsflyers." 32 Clinton St.. White Plains, N.Y res, Wl 53574; (608) 527-2066. 10603. IMPORTED DIESELS: AM. Aurora. ED, Mills, SCALE R/C PLANS Curtiss, Grumman. MVVS, PAW. Silver Swallow & Taplin; Standard SCALE DOCUMENTATION. PLAN ENLARG­ Vought planes. Send S.A.S.E. for list. Smith & R/C; 045 - 49 ci; Sport, Contest & Vintage ING Photo packs, three views, drawings for Plans, 19163 Shadowood Dr, Monument, Colo Also: Merco, MVVS & PAW glow engines. Send 1.600 aircraft. Super Scale R/C plans for Giant. 80132 $1.00 for current information. CARLSON EN­ Sport. 30 page catalog $3.00. SASE informa­ GINE IMPORTS. 814 East Marconi, Phoenix, tion Scale Plans and Photo Service, 3209 AZ 85022. Madison Ave, Greensboro, N.C 27403. (919) ANTIQUE MODEL IGNITION PARTS, O.K.. 292-5239 GHQ, Forsters, Delong, Bantams, others. Ex­ cellent timers, Needle Valves, Tanks, Point Sets, WANTED: Sterling boat kit B-15. Chris Craft ''Cor­ Cylinders. Catalog 1986, 50 p g s , $4.00 pp. vette" Also fitting kit. Please wnte J Geoghan. OLD MAGAZINES & BOOKS, model, aviation 6603 Whitley Terrace L.A. Ca 90068 (1930/1980) Huge inventory lists, $2.00 & CHRIS ROSSBACH, R.D. 1 Queensboro LSASE: Vern Clements, RO. Box 608, Caldwell, Manor, Gloversville, New York, 12078. Idaho 83606-0608. GEE BEE'S— Precision scale, not semi-scale FUN! ADD TO YOURS and improve your (accurate plans, accurate models). Plans List; modeling skills. How7 With our many fine pub­ descriptive, photos, educational, R/C conver­ WANTED: Ignition model airplane engines and lications and out-of-the-ordinary items for model sions described, also includes other Golden model race cars made before 1950. Jim Clem, builders Send for expanded catalog today. Era scale models, sport, FF, CL $1.50 & 1201 E. 10, P.O. Box 524. Sand Springs, OK Only $1.00. Hannan's RUNWAY, RO. Box A. Es­ LSASE. Vern Clements, 308 Palo Alto Dr.. Cald­ 74063; (918) 245-3649 condido. CA 92025. Many h a p p y customers! well. Idaho 83605.

NOVEMBER 1986 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 105 FULL-SIZE PLANS SERVICE 106 sub­ a on produce parts help miscellaneous basis afew to contracting than Lykens other the of manufacture the in volved course, less postal costs. lesspostal course, all writer and this orders informs Herb Brown. taking same, of Lykensshipping capacity the the in Only advertising in agent an­ periodical and goxes, tanks, as such Brown, name!), middle Brown's Bill is (that Jr., (Brown engines of manufacturer ful monies have been turned over to Bill, of of Bill, to over turned been have monies nouncements. in­ directly not is Ohlsson), Hurleman, at most of the local Eastern functions. Easternfunctions. local the of most at of Herb's Engines at the Collectogether Collectogether the at Engines Herb's of fax County, Virginia, Schindler can be seenbe can Schindler Virginia, County, fax as around get doesn't he that retired, is Now Martin display. engine best-looking the gines. Herb, who himself is a very success­ isvery a en­ himself Brown who Lykens Herb, gines. of status the regarding LYKENS BROWN Fair­ of Basedout did. asformerly he much o 181 ER $4. 0 .0 4 $ R IE L F T O R T O O F 11861 No. o 182 1cTUNNEL BOAT 15. 0 .0 5 31 T A O B L E N N U T 11cc 11862 No. o 86O. SNUFFY S5.00 I V Y F F U N S . .T 886-O No. .00 $6 T S E U Q E R E TH .T. 986-O No. S6.00 R TE R O P IC R T C E L E 10861 No. zine include a reprint o f the construction article, it building building it article, construction f the o areprint include zine o 96 CHOCT OR $ 00 .0 2 $1 R IO R R A W W TA C O H C 9861 No. S5.00 E K A W T IS R IA G A L P 10862 No. instructions were part of the article the of part were instructions o 86 VI CATOR $7.50 R O T A IC D IN V 8861 No. S6.00 R E ID A -R C .T. 1086-O No. At present, Bill Brown has built the major the hasbuilt Brown Bill present, At Brown's Bill as acting been has Wahl o 96 MI ESQUI 10.00 $1 E IR U Q S E T S E W ID M 9862 No. Had a great time interviewing Herb Wahl Wahl Herb interviewing a time Had great All Full Size plans purchased from MODEL BUILDERfrom Full purchased Sizeplans All rr.sga w Zaad 3512ic sa. . Reid. J. span. 3 5-1/2-inch Zealand. ew N i f 2 lcrc ude-nl r m fro ly dder-on ru electric, 020 l tfu h lig e D A fast 3 6 ” tunnel boat design fo r 11 cc cc 11 r fo design boat tunnel ” 6 3 fast A ubad or o r Jry unlap. D Jerry er. pow r to o m outboard SEND TO:MODEL BUILDER PLANS SERVICE 0" pn ‘04 dsg b Bb oft. To Bob by design gas, /B A ‘40-41 Cl. span, pylon " 50 pod/boomish Sharp Adams. Les avail. fuse 'Glass electric. aero­ slow for ship pattern Tail-dragger competitive. very but build, to Gray. Simple Steve By up. and 05 for span, et '1 r ris B Fak Ehling* Frank By Trails. ir A '41 Sept. 65" to scaled Porter Turbo Pilatus /C R Cabin-type Class A /B high climber from climber high /B A Class Cabin-type Litchenburg. Johnny up. and 0 .6 batics. Schoenbrun. . M & LaTorre M. winner. ey Gldao"lk Cas contest C Class ladiator"-like "G Very Isaacks. Bob by combined, ideas Best itc, oat 5pwrd aerobatic 15-powered Cobalt Hi-tech, built rudder-only trainer, for 10-15 eng. 10-15 for trainer, rudder-only built aosRC rrf eisN. . Most 6. No. Series ircraft A R/C Famous 9 t6th 898St..Newport W Beach. CA 92663 BUILDER MODEL#

o 76 T KORDA D/ $4.00 /T D A D R O K .T. O 786 No. o 76CP ME SPI RE $ .00 $5 E IR F IT P S W O EG M 786-C.P. No. o 7 2 AN MK 88 9 00 .0 5 $ 8< 9 8 K M N IA D R A U G 62 78 No. o 8 OT SPR OMBY Ά' S5.00 ' Ά Y B M ZO SUPER O.T. 686 No. .00 $4 G IN IK V 7861 No. o 86 RC DER WI S4.00 H C IN W R E ID L G R/C 62 68 No. o 56 SA OT D 11 S4.00 111 KD D T LO O AM S 5862 No. S11.75 E E B LE B M U B 6861 No. No. 5861 ELEC TR IC B E A V E R S5.00 S5.00 R E V A E B IC TR ELEC 5861 No. yidr, clnes o bae bt by­ but brazed not (cylinders cylinders, S4.00 L L U G O.T. 586 No. yet, give him a call at (814)237-7504.at call a him better give yet, or 16868, Pennsylvania Mills, Grove 77, Box at Pine Brown Bill sug­ to Herb gests en­ write you each problem. a have you with if So, plugs gine. spark V-2 provide to been not have items, small other valves, GONEWEST promises also Bill date. this as of produced needle as such Items done.) are passes machined crankshafts, crankcases, parts, of Old Timers unto the younger set. younger the unto Timers Old of torch pass the to istime it getting and aren't younger any we remember, to something the since died had who those of read were somber rather a on close we Champs, SAM model and motorcyle. What a way to go! to way a What motorcyle. and six model around Bruno found patrol Force The Air contest. the of close the at field the on last banquet. That is quite a number, just just number, a quite is That names banquet. last 34 Banquet, Victory the At note. o'clock in the evening beside his errant errant his beside evening the in o'clock collapsed had Markiewicz Bruno that hear odr Minimum order S1000 credit orders to d 5% v e Add signature. and date, expiration ber. num card Include Master Card VISA accepted or ders FPO and or­ APO for d PostageU a S. or orders. p funds Overseas on Order Money International Remitt)y der For Air­ Overseas order. total Class of U55% in S., add mail (includes Canada and Mexico), add 50% o f total or or f total 50% Canadamail o add (includes Mexico), and First or For Airmail Class 4th mail or 3rd Priceincludes lgty agr eso o Kras 1939 Korda's of version larger Slightly CALIFORNIA RESIDENTS ADD 6% SALES TAX The banquet was further saddened to to saddened further was banquet The kfed inr wt ery ye T. /T D type early with winner, akefield W e sae Al is n fres shown. formers and ribs All scale. ber For the wrapup of the report on the 20th 20th the on report the of wrapup Forthe are.Cnetpoe. y il Melton. Bill By proven. Contest Carrier. 5-nh pn odn r lsi rub­ classic Era Golden span 50-inch A C fr 09 B Mie Saponara. ike M By 2-ch. .049. wing D T foam for /C tapered R swept, Sleek f et 4 dsgs B Lo Shulman. Leon By designs. '41 best of Latest versions of top C /L Profile Navy Profile /L C top of versions Latest ol u.i' ra o l. ud Fox. 8uddy all. for great it's Cup. World zc rputr 6-0 L Mikulasko. M L. 60-90. cropduster, Czech at lm & laiggie ae t one it made glide floating & climb Fast eeoe a sadr fr h 2-Meter the for standard as Developed unusual an f o odel m Scale port S /C R eso ofaPls lgtln. span. " 8 2 Scale lightplane. Peanut es Polish a f o o-tim tw version ooney's M alt W electric flight. 57” span. By Steve Gray. Steve By span. 57” flight. electric A scaled-up Bostonian design for R/C R/C for design Bostonian scaled-up A W akefield w inner G ordon Ligh t's 1936 1936 t's Ligh ordon G inner w akefield W ubr nuac si. wingspan. " 8 4 ship. endurance rubber NEW ORDERING INSTRUCTIONS

o 46 ROOKE I 11. 5 .7 1 $1 II KIE O O R 4861 No. o 26 RC L S S3.00 TS A FLO R/C 2862 No. S3.00 /3 A . PID A R 3862 No. o 2 00 .0 5 $ R E G A Y O V 3 6 28 No. o 181 5 a95 9 .00 $4 ia S H T O M PUSS .T. O 1722 No. -5 H D 12851 .00 No. $5 R E G D O D 'N L 'K R B .T. -0 6 8 1 No. o 36 MI ANT S5.00 T N IA G O R IC M 3861 S4.00 No. S4.00 ER N IN W T U TO S O.T. 486 No. I R U A T N E C 4862 No. o 16 T T 5.00 $5 TTE E S S TO 1861 No. o 26 S AE NER $ .00 $6 R E IN A R T UARE SQ 2861 No. o 36 .. 4. 0 .0 $4 U V A C O.T. 386 No. weeks prior to the Champs working from from working Champs the to prior weeks of the table and all appeared like ghostly ghostly death. his like appeared commemorating spires all and table the of end at the placed were him by won trophies read. were events flight free the in winners o 26 .. R ENDURANCE $2.75 E C N A R U D N E JR. O.T. 286 No. cation in February. This writer is going to to going is writer This February. in cation Mildred, Bruno had spent the last three three wife, last his the spent to had According Bruno time. Mildred, the at 63 Bruno's name came up seven times. The The times. seven up came name Bruno's ista l rf a! · man! gruff old that miss Edu­ of Board Detroit the from "graduated" morning to midnight getting his models models his results! the in getting showed certainly It ready. midnight to morning revealed autopsy was Bruno attack. a of heart official died had Bruno the Kowalik, long as a carpenter foreman as he only only he as foreman carpenter a as long The evening was further depressed as depressed the further was evening The In a newspaper clipping sent by Chet Chet by sent clipping newspaper a In .00 $5 PB-1 EING BO 11851 No. Bruno didn't enjoy his retirement too too retirement his enjoy didn't Bruno rie,6-024cce B Bil inter. W ill B By 2/4-cycle. 60-90 trainer, lght owlne gie. ao r Jindrich. ir Jarom glider. e lin w to t h flig LaBarge. Jim By engines. .06 to .049 rt/ o sp /C R updated fortable, com Large, E asy-to-build, one-meter span F A I free free I A F span one-meter asy-to-build, E r fo in tw t n tu rt/s o sp file ro p line ontrol C ht az' fmu rbe cl ship. scale rubber famous Lanzo's Chet /C R on construction scale Proctor-like W inner of '3 9 S to u t T roph y, 4 1 " span, span, " 1 4 y, roph T t u to S 9 '3 of inner W le lk O.. kfed r ni ited! Unlim or akefield W .T. O like Flies for reed-valve Cox .049. Tyrone Parker. Tyrone .049. R/C Cox reed-valve for two-channel aerobatic Fast-moving Cute little 44-inch span 1938 parasol parasol 1938 span 44-inch little Cute /-cl WI ihe. y ak lltzsch. Hank By fighter. WW-I 1/4-scale C /L A e ro b a tic S tu n t C ham p for .40 . 46- 46- Zawada. . tr io .40 P for By p span. ham C " t n 4 6 tu S engines. tic a size b ro e A /L C imn-ueae ubr b Bo ft. o T ob B by rubber, diamond-fuselage o .6 o . nie, y e Willard. W Ken by engines, 0 .1 to .06 for a Tiis 6ic sa fe fihe is flighter free span 56-inch Taibi's Sal still com petitive in B or C class events. class C or B in petitive com still Peerless M odel A irplane Co. 18-in. span. 18-in. Co. irplane A odel M Peerless ad r lp saig u. d Depue. Ed fun. soaring slope or yard Sim ple to b u ild floats fo r up to six-lb. six-lb. to up r fo floats ild u b to ple Sim ilson. W George By for 'er. /C designed R trainer beginning the /C R span 72-inch A 8ic sa R/ ldr o school- for glider /C R span 58-inch A 1937 rubber-pov\*red m odel fro m the the m fro odel m rubber-pov\*red 1937 . n ctio stru con pine and Balsa airplane. eisaeti 12 egn fyn boat flying engine 1/2A twin Semi-scale o F/ r -h /. y il Eckmeier. Bill By R/C. 2-ch or /F F for OE BUILDER MODEL

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? HIGH PERFORMANCE CARS. Handling today 's high-powered, high-speed radio controlled cars is easy. Just reach for your Magnum. Junior. Futaba's pistol-grip Magnum Junior has it all. For starters, you have a choice of three different servo options to suit your space and performance needs. Servo reversing and throttle ATV take the has­ sle out of installation. Even the steering wheel throw and spring rate are easily adjustable. New FPMC8 electronic speed control. Proportional On the track, the Magnum Junior's dual rate lorward and reverse, with adjustable braking. Capacity: lets you fine-tune steering response instantly. 7.2v/20A (30A surge). Now there is a way to make your Magnum Junior system even faster. Our new MC8 speed control lets you eliminate the MC8 is perfect for off-road cars. the throttle servo and resistor as well as the Get all the control you need to handle your receiver battery pack. Using solid state FIIC car. Go with Futaba. the world leader in electronics that can't wear out or corrode. radio control.

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c 1986 Futaba Corp SUPER H O T SUPER SHOT! Introducing the new MRC-Tamiya Super Shot. The 4x4 off-road racer that puts the heat on the competition. All the “options” are standard With the introduction of the new shaft driven 4x4 MRC-Tamiya Super Shot, you’ll find Tamiya has designed this racer with all the most popular “options” as standard equipment. The result? A precision built, all-wheel drive buggy that’s practi­ cally ready-to-race right out of the box. Ball bearings, Technipower and other things to go We went all out with this one. We designed a totally new buggy from the ground up, and built in all the best hop up features MRC Tamiya has to offer. Like extra ball bearings, to help make the Super Shot one of the smoothest running, all-powerful R/C buggies to date. We didn’t stop at three or four, though. We put all 24 ball bearings in all the key areas. The rear gearbox has seven, the front has nine, and the front and rear drive shaft mounts have eight. You just can’t add any more! Then there’s our Technipower powerplant. Tamiya’s fastest, torquiest motor available today, with 20,300 maximum RPM’s of earth-moving strength. Underneath, we’ve installed large volume, adjustable oil-filled shocks with damper cylinders for a superior ride. 4-wheel independent, double-wishbone suspension. Lightweight wheels for quicker acceleration. And semi-pneumatic pin spike tires for unparalleled traction. We’ve also included a sturdy monocoque chassis, a huge rear wing and a protective roll cage. Even BEC for a faster return on investment Of course, the Super Shot uses BEC (Battery Eliminator Circuitry . . . not included) that reduces weight for more speed and faster acceleration. The MRC-Tamiya Super Shot. We’ve got what it takes to give you the winning edge .. . and it all comes as standard equipment. So get super hot. Get the Super Shot.

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