MARCH 1985

U.S.A. $2.50 Canada $3.00

IC D 08545 volume 15, number 158 j SELECT" 1 u s r

• 1 1 ». · ■. * : ■ Λ. Λ Λ Μ

ItN H P O S

The 8SGA (airplane) programming and trim panel. New See Back Panel for Details. programmable mixing and aileron dillerenlial control, plus 2 servo lest circuits and digital ATV control. The extra protection of PCM is just one feature of our professional aircraft (8SGA) The Wave o f the Future. and helicopter (8SGH) systems. A glance We call it pulse code modulation at the 8SGA back panel reveals the wealth (PCM), and only Futaba’s new 8SGA and of rate, trim and programming options 8SGH professional R/C systems have it. available to the competition pilot. Coded Protection. Fully Loaded. An exclusive Futaba-designed PCM Futaba's 8SGA incorporates 7 mixing microprocessor converts signals to a circuits, including programmable mix for digital, binary code. added versatility and performance. Both The PCM decoder-equipped receiver the 8SGA and 8SGH also feature built-in The receiver with a brain. Our new RTI8G is factory- will respond only to this code, rejecting Tachometer Timer. 3-way adjustable open programmed to ignore unauthorized signals. It also has noise and interference. gimbals, frequency modules and a quar­ a memory bank to minimize loss ol control problems tet of dust and fuel proof S130 ball-bear­ caused by adjacent and direct band interference as well as dead points. AM i Amplitude Modulation) Sub/tcl to initrtennet ing precision servos. For complete specifications, including a new brochure, just write Futaba. The FMIFrequency Modulation) wave of the future in radio control is here.

PCM (Pulse Code Modulation) 555 West Victoria Street Compton. CA 90220

Digitized binary codes reotace pulse width waves using Futaba's breakthrough PCM microprocessor. At up to 10 commands a second, discrete signals precisely control servo response.

Μ!mMi IN THE BEST CIRCLES, ITS fiber skiier

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch 10 Available in seven satin anodized handle colors silver, blue, red. green, gold, b la c k . & v io le t. Precision, Instrument-Quality Materials C om plete set in fitte d hardw ood case, includes Strong-Holding Advanced Collet Design 11 uber Skiver, together with two vials containing Non-Rolling Hex Cross-Section four No 11, and one each of Nos 10. 12. 15. and 2 0 ...... $16 95 Deeply Knurled, Non-Slip Grip Individual handles (specify color) $6.95 Long-Life, Stainless, Vial of 6 blades (No. 10. 11. or 15) $3.00 Surgical Steel Blades (No. 12 or 20) $4.00 20

See y o u r dealer, o r order d ire c t. 0 Dealer inquiries are invited. All direct orders sent postpaid in U.S. MODEL BUILDER PRODUCTS California residents add 6% sales tax. 621 West Nineteenth St., Costa Mesa, California 92627 MODEL MARCH 1985

BUILDER volume 15, number 158 621 West Nineteenth St.. Box 10335, Costa Mesa, CA 92627-0132 Phone: (714) 645-8830

STAFF EDITOR/PUBLISHER CONTENTS Wm. C. Northrop, Jr. FEATURES GENERAL MANAGER Anita Northrop ASSISTANT GENERAL MANAGER W O R K B E N C H , Bill Northrop...... 6 Dawn Johnson O V E R THE C O U N T E R ...... 8 PRODUCTION ARTIST T O U R N A M E N T O F C H A M P IO N S , EloyMarez. . . . 11 Howard Millman QSAA'S 1984 FLY-IN, EloyMarez...... 14 DRAWINGS BY Al Novotnik EUROPEAN SCENE , Cees Kaijim...... 18 ACCOUNTING DEPT. MANAGER GOSSAMER SLOWPOKE, Francis Reynolds...... 20 Michael Whitney BIG BIRD S, Al Alman...... 22 SUBSCRIPTIONS CHOPPER CHATTER, Ray Hostetler...... 24 Jo Anne Glenn EL P R IM E R O O N E -D E S IG N C O N TEST, BillForrey 26 Karen Carothers R/C S O A R IN G , BillForrey...... 28 CONTRIBUTING EDITORS PLUG SPARKS, lohnPond...... 31 Al Alman Fred Lehmberg Jake Doe Eloy Marez EN G IN ES O F THE W O R L D , Stu Richmond...... 36 Jerry Dunlap Walt Mooney ELEC TR O N IC S C O R N ER , EloyMarez...... 38 Bill Forrey Mitch Poling ACE VOLTMASTER REVIEW, EloyMarez...... 39 Bill Hannan John Pond Dick Hanson Fernando Ramos ELECTRIC PO W ER , Mitch Poling...... 40 Mike Hazel Stu Richmond THE STATEN ISLAND FERRY, WaltMusciano...... 44 Ray Hosletler Dan Rutherford Ken Johnson John Smith R/C PO W ER BO ATS, lerry Dunlap...... 46 Cees Kaijim Bob Stalick H A N N A N 'S H A N G A R , Bill Hannan...... 48 Joe Klause C liff Tacie IN D O O R , Ken lohnson...... 50 ADVERTISING FUN IS THE BEST R E W A R D , Bill Hannan...... 56 REPRESENTATIVES LE TTER IN G T E C H N IQ U E S , MarkFineman...... 58 Bill Northrop C O N T R O L LIN E, Mike Hazel...... 60 Home Office, Costa Mesa Al Novotnik FREE F LIG H T, BobStalick...... 62 4 Beverly PL, Norwalk, CT 06850 Bus. Phone (203) 847-7478

MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC., 621 West 19th St., Box 10335. Costa Mesa, CONSTRUCTION California 92627-0132. Phone (714) 645-8830. Subscriptions: $25.00 per year, $47.00 for WITTMAN BUTTERCUP, Air Trails Reprint . . . . 19 two years. Single copies $2.50. Subscriptions outside the US (except APO & FPO) $32.00 TWIN PUSHER O.T., Carl Schmaedig...... 35 for one year only. All payments must be in HALF-A TEXACO PLAYBOY SR., |im Reynolds 43 US funds, drawn on a US bank.

BIRDYORNITHOPTER, Ken lohnson...... 51 Copyright 1985 by RCMB INC. All rights

C O 2 W H E E LAIR 11 l-A, Walt Mooney ...... 53 reserved. Reproduction without permis­ sion prohibited.

Change of address notices must be received six weeks before date of issue that new address takes effect. Send old address with Cover: This could be a first . . . the first time a human being has been able to sit in, not new; old label preferred. Post Office will on, a model aircraft. On the other hand, Jerry Gardner's "m odel" is more precisely a half­ not forward copies unless you pay extra size aircraft The half-size "p ilo t" is Melissa Lee, age 4, of Las Vegas, Nevada. The photo was taken by Eloy Marez at the 1984 QSAA Fly-In. See story beginning on page 14. postage. Duplicate issues cannot be sent. Insert shows the pit area and Circus Circus clown, at the 1984 Tournament of Champ­ ions . . . also in Las Vegas. Story begins on page 11. Second class postage paid al Costa Mesa. California, and additional offices.

MODEL BUILDER Dedicated to Perpetuating ti>e Sport o f M odel Aviation The Model Aviation Historical Society introduces the second in a series o f historical model aircraft engine reproductions

Three bladed adjustable pitch Five hand-crafted spark plugs aluminum display prop and with hi-tension leads are the tubular steel engine mount included. formerly featured as an option are NOW INCLUDED in this complete historical reproduc­ tion package.

New cylinders now feature a steel sleeve cast in position.

Cast aluminum pistons will NOW feature mehanite rings.

Actual photos of one of our $795.oo reproduction engines. introductory offer (5H” diameter—.95 displacement) until May 15, 1985 (after this date the engine will return to its full price the M-5 of $850.00) O ur M-5 reproduction has been includes the previously critical dis­ thoroughly researched and tested. tributor and low compression. MAHS Γ Drder yours today Completely new dies have been has achieved the production of a good Model Aviation Historical Society created from original drawings and running M-5 as the original design and ■ 12 Cook Street, Rowayton, CT 06853 schematics. No original dies were used concept really intended. All engines I PLEASE NOTE: A $200.00 deposit or full and no parts were copied from old will be test run. This M S is not prepared ■ paym ent o f $795.00 per engine is required with production engines. New improve­ for RC but can be customized with an RC I your order. You will receive a registered ments have been engineered into this carburetor and throttle. Please write for an j numbered receipt for your deposit. This J number is your acknowledgement and delivery reproduction to correct former prob­ estimate on this optional offer. I position. All paym ents will be “ SAFE'* on lems of the original engines and this C 1985 Model Aviation Historical Society I deposit with the Fairfield County Savings Bank j until your order is shipped. I Allow 10-14 weeks after order receipt for delivery. I Postage, Handling and insurance ($10.00 per engine) j Sales Tax (Connecticut Residents add 7%%)

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I J New MiG-15 . . .

Λ For years, you and thousands of other modelers the has grown and matured considerably. Years of testing!u T \ world over have raved about how great an airplane the and product refinement have produced numerous state- Byron Originals MiG-15 is. You appreciated its simple of-the-art features that have since made our F-16, A-4 construction and operation, reliability, scale appeal, and F-86 kits world famous. These same features can unmatched performance and above all, its top value. now be found in our so-called “ Hybrid MiG” . Things Well, now you can find a lot more of the same in our like fuselage panel line detailing...retract ready plug-in new and improved wings, upright fueling and starting...improved aileron MiG-15. Since its design...and lots more. Features that mean even better first un­ performance and reliability, enhanced scale realism, eas­ veiling ier and faster construction and more convenient storage in 1979, and transportation. But, best of all. it's available now for our ducted immediate delivery right to your doorstep at factory fan line-up direct prices!

1/7 Scale

Specifications WingSpan ...... 57” Recommended power suitable Wing Area .. .. 600sq.in. Schnucrlc ported .60or Rossi .81 Length ...... 55” Channels required...... 4 (5 w/rctracts) Ready-to-fl>-weight Servos...... No less than 32 oz./in torque fw/Rossi .81 and retracts) .... 10'4 lbs.

Quick & Easy Transportation And Storage! An improved plug-in wing system makes transporting and storing the new MiG a snap...even for those with the smallest of compact cars and workshops. Wing construction has also been greatly simplified by eliminating (he old fashioned built- up wooden spar. A factory-installed aluminum spar has taken its place. Both wings remove by simply loosening four socket head screws. With wing panels removed, the MiG requires no more space than most .40 or .60 size models.

No Manufacturer Offers You More Kit Value For Your Money!

Byron Originals is no doubt known for offering you both quality and quantity for money spent. When you open our shipping cartons, you find a whole lot more than just a fuselage and a BIG roll of plans. Instead, you’ll find a whole array of all Ihe necessary items for assembly, except of course, the engine, glue, paint, etc. These are also available from us at super prices. So when you begin inspecting your new MiG pur­ chase, look forward to a unique jet package that's loaded with extras and sur­ prises...pleasant ones, that is.

Optional Pneumatic Quick Connectors For Added Convenience! The new MiG has also been redesigned to accept our optional Quick Connectors to further facilitate wing removal and attachment w hen retracts arc used. Simply loosen two socket head screws, air lines automatically disengage. Precision double O-ring seals assure positive, leak-free connections. New guide pin at leading edge of wing root provides proper wing alignment and stability. Canopy easily removes for quick access to radio gear. Also note convenient location of fuel selector and refueling probe. (Sec details opposite page.) Back by Popular Demand! The New Byron MiG-15 . . . Better in Every Respect!

Tor those who prefer fixed gear, we have an optional landing gear kit consisting of pre-bent nose and main gear, aluminum mounting plates, steering cable, wheel collars and all necessary wood and fasteners. It's been designed especially for quick and Retract-Ready Wings...Another Byron Exclusive! easy incorporation in the retract-readv wing. Wheels and tires are of course included in the MiG kit. Already a proven concepl in our A-4, F-86. Baron 58 and P-47, relracl ready wings are standard equipment in our new MiG. Light, yet durable aluminum mounting brackets are drilled, tapped and then precisely fused into the wing during the New & Improved Aileron Linkage System molding process. Landing gear pockets and wheel wells are also formed at the The new MiG also features a new torque rod bushing and same time. This exclusive feature makes precise and sturdy relracl installation a repositioned hell-crank for improved aileron stability. These new quick and simple bolt-in process. The MiG is designed for the well-known Rhom features, coupled with improved construction methods and A ir retracts— also available from Byron Originals at super competitive prices. materials, result in a positive linkage system you can trust at any speed.

The new “ Magic W and" from Byron Originals’ makes Byro-Jet starting easier, faster and more reliable than ever. Eliminates two-man starting and slippage problems associated with the conventional friction cup approach. It easily threads onto the well-known Sullivan Starter. A guide cone positions and firmly seats a socket over the prop nut. Once (he engine starts, the special one-way locking bearing allows the socket to freely spin along with the fan blade, permitting you to simply pull the starter extension away from the spinning blade. The "M agic W and" also Even Better Performance and Engine Reliability With features an exclusive sealed hearing that keeps out dirt and other abrasives. This means years of easy and reliable starling convenience. Byron Originals’ Sure-Flow Fuel Tank and Manifold. • Convenient upright fueling and starting that eliminates fuel leakage into canopy. • Quick and easy verification of proper fuel mixture before flight. • Helps achieve maximum power boost from tuned muffler. • Maintains constant fuel level directly in line w ith carburetor. • Helps to reduce foaming fuel reaching carburetor. • Allows utilization of a full 20 oz. of fuel for longer flight times. • Positive fuel shutoff helps prevent hydraulic fuel locks that can damage cranks during engine starling. • Fuel shutoff feature also helps prevent engine flooding by permitting you to effectively burn o ff excessive fuel that normally accumulates in engine during shutdowns. MiG Info Pack: $2.00. Complete Catalog: $3.00. Order Factory No. Item Price Shipping 6130010 MiG-15 K it...... $220.00 $8.00 6130071 Byro-Jet Performance Package w/Rossi .81 239.95 3.00 Byro-Jet Performance Package 6030340 Fixed Gear K it...... 16.00 * The same ducted fan specialists who revolutionized the hobby with their 6030202 Upright Fuel Manifold...... 26.05 * patented Byro-Jet are offering the most complete high performance 6130075 "Magic Wand" Starter Extension...... 29.95 · package ever. Combining state-of-the-art Rossi .81 engine with the Byro- 2630041 Rhom Air 1000 BM R etracts...... 85.75 * Jet and tuned pipe produces a ducted fan propulsion system that easily 6030203 Pneumatic Quick Connectors (1 pair)...... 8.50 · oul-performs anything else on the world market. On only 5°'o nitro fuel •When shipped with MiG, no shipping charges. Ordered separately, $3.00 this winning combination generates a full I I 1: lbs of static thrust at per item. (Alaska. Hawaii & overseas-call for shipping charges.) 20,000 rpms. Tests were conducted with a 24" long thrust cone with a 6 " intake and 4V:" outlet. Order today for fast U.P.S. delivery at our low factory direct prices! Byron Originals · P.O. Box 279 · Ida Grove, Iowa 51445 · Ph. 712-364-3165 • Although we don't have enough reliable Worry alone and the ignorance of the and authoritative information at this time medical profession regarding it makes (or to make any positive statements, it seems something less than mental tranquility. I'll that a tentative warning is in order regard­ keep you posted. In the meantime, I sug­ ing the use of Boron filament. If you don't gest you do not get yourself into a similar know what this material is, it's probably predicament." just as well. If you do know what it is At the time this issue was being pre­ and/or you've been thinking about using pared, we couldn't get in touch with Bill it, read the following very carefully. It was for a follow up. We'll do that as soon as MB's editor with the delta free flight flying wing that he crash-built for the Northrop Fly­ written by Bill Warner, of the Flight- possible. In the meantime, it seems like a ing Wing event (and crashed) held at Mile masters, and has appeared in a couple of good idea to back off until we know more. Square in November. For rest of story, see newsletters. PETER WESTBURG H annan's Hangar co lu m n in this issue. "BORON FILAMENT is to be avoided It is with a special sadness that we an­ Pete had to discontinue production of like the plague. Sure, it stiffens up your nounce the passing of Pete Westburg, on these classic plans several years ago. model and lets you build nice and light, Thanksgiving Day, 1984, at the age of 70. Although he could see better after the but what are you risking? At Sikorsky, they He is survived by his wife, Madeline, and operations, the strain of depicting the fine call the Boron Room the "Death Room." a daughter living in the Seattle, Washing­ detail he was so well known for could no Protective clothing, masks, and a ll the ton area. longer be endured. In his last years, he good stuff. When someone gets a bit of it Pete was best known in the aviation had been attempting to sell western in them, they cut it out immediately. Neal world for his superbly accurate and adventure novels through major book stuff. I tried using it, figuring that I cer­ detailed scale views of many military and publishers. tainly was smart enough not to have any civil aircraft from the Golden Era, the Pete was raised in Michigan City, Indi­ problems. Well, despite all my precau­ 1930's. Working closely with Pete, M odel ana, and came to the Santa Monica area tions, which included protective glasses, Builder magazine has presented all of his of California to work for Douglas, just be­ and taping all unused bits to a white drawings, each accompanied by photo­ fore World War II, as an aeronautical en­ paper so as not to lose any, some got graphs and brief histories of the aircraft, gineer. He held several patents, including away. When it gets away, it just disap­ over the past ten years. Because of eye one on a flap mechanism developed for pears. It has the thickness o f a human hair. problems, resulting in lens transplants, the DC-8. Except for a period when he It is non-magnetic, so you can't pick it up that way. It gets lost in the carpet. It goes was "loaned" by Douglas to the Davis into the flesh easily and accidentally. I Motorcar Company (Remember their found I’d get a bit into a finger despite my three-wheel passenger car?), he stayed best efforts. Finally, I began feeling a pain with Douglas until his retirement, still liv­ in my right foot. Somehow I had picked ing in Santa Monica. up a piece while barefoot (the bed is only The aircraft that Peter Westburg ac­ three feet from my work space). I called curately recorded in ink on mylar will live Kaiser Permanente about it and they did on forever, and his memory will be just as not know a damn thing, except that an X- well preserved, for having made that con­ Ray w ould be useless w ith something that tribution to the history of aviation. size. Los Angeles County and UCLA Medi­ SAM ACROSS THE OCEAN cal Center were also ignorant of what Those who are active in the old timer could be done. Finally, an end about movement are probably aware that the So­ .005" long worked itself out and my dear ciety of Antique Modelers has spread to wife, Phyllis, performed surgery and got countries other than the U.S., where it was out the offending bit, a piece about 1/16" founded. Although the interest is common long. Even then, it broke off several times to enthusiasts all over the world, the rules during the extraction process with tweez­ by which each country's SAM organiza­ ers, plus it keeps going deeper in when tion operates vary to some degree. Even in you try to get it out. this country, where some local variation "Since then, we have repeated the oper­ from the national rules is a normal pro­ ation several times for other bits, and it is cedure, there are strong differences of not fun. Also my foot still is hurting, with opinion about certain basic requirements: the boron filament somewhere inside. The Aeroplane M onthly, a vintage aviation journal engine specifications, and scaling up or articles sound the alarm that when it gets from England, is making a special bid for new down are two good examples. in the bloodstream, look out. Great! the readers in the U.S. More information in text As for differences of opinion between 6 MODEL BUILDER countries, the primary variance seems to be in the cut-off dates specified for the "birth" of competition-legal models. In the U.S., the cut-off dates are Dec. 31, 1938 for Antiques, and Dec. 31, 1942 for Old Timers. In England, the antique is referred to as "Vintage," and the cut-off year is 1942. This is quite understandable, as Bri­ tain was a little bit too otherwise occupied between 1938 and 1942 to be concerned with model airplane development. By the same token, their cut-off date for Old Timers is 1952 (Dates may not be exact. These were approximated by )ohn Pond over the phone). So now what happens at a contest? Currently, in the U.S., if you want to use a British design, you must use our cut-off, not theirs. In England, they can use U.S. models up to their cut-off dates, which in effect, means that they can compete with models equal to our Nostalgia class in th eir Old Timer events! The logic doesn't compute. On Dec. 1, four crewmen from the FFG Class Guided Missile Frigate HMAS Darwin, of the Why not this way... In both the U.S. and Royal Australian Navy, shown above, came to pay a visit to Model Builder's office. The four England, fly U.S. designs per our age Australians; Seamen Jeff Ryan, Dale Simpson, Graham Coles, and Sean M illington, are all elec­ tronic technicians, and serve aboard the Darwin, which was built in Seattle, Washington, and specifications, and fly British designs per had put in to the U.S. Naval Ship Weapon Systems Engineering Station, Port Hueneme, Calif., their age specifications. What the heck... before completing its shakedown cruise back to Seattle. Because the four seamen are modelers, the same U.S. designs; Playboy, Lanzo, contributing editor Fred Lehmberg, with the assistance of Ed Reyes, brought them to our office Dallaire, Bomber, MG, etc. will still prob­ for the visit (and a fun-filled lunch of beer and pizza at Luigi's, fust around the corner!) ably do all the winning! What brought all this about? Just recent­ ly, we decided to take a look at a couple of the British-made Ben Buckle kits being marketed in this country by Hobby Enter­ prises, Fruitland, Florida. The two designs that caught our fancy were the "Super Scorpion" and "Majestic Major." The Scor­ pion is a scaled up 'Topper," which in turn, was the Bay Ridge kit version of "Scotty" Murray's 'The Answer" (Aug. '84 MB), making it U.S. SAM legal. The "Majestic Major," however, is a scaled up "Junior 60," a 1946 British model by Al­ bert Hatfull. It's design is about on a par with the old Buccaneer Standard and Tai- bi's "Powerhouse," and about as equal a competition threat. To many old timer enthusiasts, half the fun is coming up with a rare or unusual bird from the past and to see how it fares against other designs, especially with the use of new materials, modern engines, Advice for the Propworn and best of all, radio assist. Why not allow a fair mix of models from other countries Dear lake: ★ ★ ★ of the world? Our flying field has one large tree locat­ Dear lake: Incidentally, the two Buckle kits we ed at one end o f the flying area. It seems I live in Florida and I'd like to know received appear to be excellent. High to attract model planes like a magnet no what the ideal wing loading for an R/C quality wood, machine cut ribs and matter how good the pilot(s). I wrote to sailplane is. blocks, nicely done drawings, etc. Jim the Federal Government regarding this Soarer in Sarasota Adams, SAM SPEAKS editor, is building problem and the U.S. Department of Agri­ Dear Soarer: the "Super Scorpion," and the "Majestic culture responded as follows: We should I don't live in Florida, but I'd like to Major" is a little further downstream. plant a similar tree at the opposite end of know that too. THINGS TO DO the field so that the magnetic attraction of Jake Larry Snedeker sends information on the the two trees would cancel each other ★ ★ ★ Second Annual Hamilton Four-Stroke Fun out. This would enable all models to sort Dear lake: Fly and Rally, June 29-30, 1985. Three of land in the neutral zone in between. Why don’t you write a book? I could al­ events, plus Stand-Off Scale Competition - What do you advise?? ways use a good book on a cold winter’s Multi-Wing - Sportsman. Any model po­ Bob in Panama C ity night, especially if I need something to wered by four-stroke engine(s) up to a Dear Bob; get the fire started. maximum of 50 pounds flying weight. Never argue with the Federal Govern­ Bookworm in Beckridge Motels are within ten minutes of the flying ment. Their advice sounds perfectly good Dear Bookworm; field, first prize in the raffle is a six- to me, and with a tree at each end of the I've tried my hand at writing. I sent a channel radio. For more information, con- field you'll be able to practice pylon rac­ 'Most Unforgettable Character' story about ing as well as wing repairing. Continued on page 95 Jake Continued on page 106 MARCH 1985 7 OVER THE COUNTER AH material published m "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 R/CMB does not constitute an endorsement of that product, nor any assur­ ance as to its safety or performance by R/CMB.

D.G.A. Designs, 135 East Main St., Phelps, N.Y. 14532, 315-548-3779, is now offering two-inch scale plans for its Davis D-1K and Kinner Sportser K. The company has photographically reduced its quarter- scale plans for these two aircraft, making them great subjects for the popular four­ cycle engines now available. Of course, two-cycle and diesel engines would also be appropriate. In two-inch scale, the Davis spans 60.3 inches and the Kinner Sportster spans 78 inches. Price of either two-inch scale plan is $15 postpaid in the USA or Canada, shipped rolled, in a sturdy cardboard tube. Photo documentation packs, consisting of twelve 35mm color prints, are available Radio Control Models (RAM) Big Boat, comes with Astro Flight motor. at $7.25 postpaid for each model. New York residents add 7% sales tax on all orders.

A*rof«x Mlnigraph 5

M cD onnell Robbe "Parat", for glo power or with electric drive system. F-1 0 1 B /F ★ ★ ★ ensions are slightly less than the lower dis­ by Kevin Keavonoy The O.S. FT-160 Gemini Twin four-stroke placement FT-120, but the radial mount engine is now available, through World has been designed so that the FT-160 can Engines, 8960 Rossash Ave., Cincinnati, be mounted using the same bolt holes for OH 45236, 513-793-5900. The FT-160 is a the FT-120. completely new engine, not just a bored- The FT-160 comes equipped with a radi­ out FT-120 Gemini. Displacing 1.62 cubic al mount, glow plug lead wires, needle inches, the FT-160 weighs 38 ounces valve and choke extension rods, feeler Current release from Zenith Aviation Books. without the radial mount. Physical dim­ gauges, and a complete wrench set. Car-

The O.S. FT-160, available through World Engines. Robbe "Geier" is glider or with electric drive system.

8 MODEL BUILDER The "Progress 4wdS" 1/10-scale off-road car from Cox. Du Bro "Kwik-Klip II"

Racing Wings stunt glider. Progress 4-wdS with body mounted.

Ace servo-operated switch unit. buretor is reversible for convenient place­ ment of choke and needle valve. Ace Nilite III on-board glow plug lighter. Suggested prop sizes, depending on the aircraft, include 16 x 6, 16 x 8 and 20 x 6. Price is $599.95. ★ ★ ★ Also from World Engines is the new Blue Bird line of engine accessories; a solid maple engine test stand, field box power panel, and electric fuel pump. The power panel is a 12-volt unit with outputs for starter, fuel pump, and glow plug. Plug voltage is adjustable, and meter is scaled to read both volts and amps. Reversing and cut-off switches control the pump. Battery leads, banana plugs, and al­ ligator clips are included. 1) The pump, for glow fuel only, has a Pneumatic Quick Disconnect, from Ace.

Two-inch scale plans for Davis D-1K from D.G.A. Two-inch scale plans for Kinner Sportster K from D.G.A.

MARCH 1985 9 Blue Bird engine accessory items from World Engines; fuel pump, test stand, and power panel. three position switch to control fuel flow either glass reinforced or non-reinforced in either direction. polyester. The 'Tempest" series is white in The test stand will handle engines from color, non-reinforced, and most durable .19 to 1.2 cubic inches in size. Prices of and impact resistant. The "Falcon" series Shrink covering for heli blades from Circus. the above items are $19.95, $12.95, and is gold in color, reinforced, stiffer blades, $6.95 respectively. less tip flutter, better performance and Check with your hobby dealer, or contact ★ ★ ★ thrust, but not quite as impact resistant. Steve Grzych for more information. Tell The "Magnum" series is black, reinforced, him you read about the props in M odel Crish Bros., Inc., Box 248, St. John, Indi­ Builder. ana 46373, 219-365-4061, long famous in the stiffest blade, with highest thrust and the model aircraft hobby as a manufac­ performance, less impact resistant than ★ ★ ★ turer of propellers, has been in the process the Falcon series. The "Voyager" series is Would you believe four-wheel steering? of redesigning and repackaging its aluminum color, non-reinforced, truer in In addition to four-wheel drive through a propeller line, and now announces four scale effect, blade stiffness equal to the guided ladder chain system, the new different series for style and performance. Tempest series, and recommended for 1/10-scale R/C electric powered off-road Each series is in a different and distinctive four-cycle engines. Sizes, two or three- "Progress 4wdS" from Cox Hobbies, Inc., color, and all have tip striping for addi­ blade styles, and right or left-hand rotation 1525 East Warner Ave., Santa Ana, CA tional safety when running. All props are choices vary with the different series. 92705, 714-546-2551, also has four-wheel steering that will really give your quick reflexes a workout. For road holding, the car features torsion bar front suspension and twin trailing arms at the rear. A Mabuchi RS-5405 electric motor transmits its power through the chain drive to all four knobby-tired wheels. Best of all, Cox will have all service parts available to keep your progress in action whenever you're ready to go. ★ ★ ★ Strengthen and provide protection for your helicopter main and tail rotor blades with colorful shrink material, available from Circus Hobbies, 3132 So. Highland Dr., Las Vegas, Nevada 89109, (702)

"G litch Buster" by Jomar. C ontinued on page 79

Jomar SC-1 speed control for 02 to 15 size electric motors. Jomar SC-2 speed control for 05 to 40 size electric motors. 10 MODEL BUILDER « » . « >

Left to right, 'Sam' Bennett, wife of T.O.C. sponsor. Bill Bennett, Tony Bonetti. Circus Overview of the pits at the 1984 T.O.C. The biplanes added a lot of sparkle and interest to the Hobbies Pres., big winner Steve Rojecki, and competition. We'll no doubt see more of them next time! M iss T.O.C., Terry Lehman. The 1984 CIRCUS CIRCUS TOURNAMENT OF CHAMPIONS By ELOY MAREZ . . . The trend setter for radio controlled aerobatic competition has made the event even better by originating credibility for biplanes, thus bringing it even closer to the real thing.

• The city that never sleeps, Las Vegas, less simultaneously. Caesars Palace Hotel/ try specifically to be in Las Vegas in early Nevada, found itself even busier than ever Casino was holding it's annual auto races November. The Tournament of Champions during the first days of November, as en­ November 9 to 11. They include the $10 was co-founded by Walt Schroder, former trants, crews, and fans arrived for three million Grand Prix which decides the na­ major sports events taking place more or tional championship; the Coors/Howard Hughes "Super Vee; and the Motor- craft/7-11 "Trans Am." All the inter­ nationally known big names of motor car racing were there. Over at the Riviera, boxing aficianados gathered for the World Heavyweight Championship bout between Larry Hol­ mes and James "Bonecrusher" Smith, to take place November 9th. And last but definitely not least was the $125,000 Circus Circus 'Tournament of Champions" November 7 to 11, an event which might not have drawn the same number of spectators as did the others, but which certainly drew them from as many states, countries, and from just as far away. Radio Control modelers from near and far gathered for one of the most interesting Canada's Ivan Kristensen "flies along" with an­ and significant events in the hobby and Maryland"s Steve Strieker flew his Stearman other pilot, using model "S pirit of St. Louis". many planned their vacations to this coun­ with realistic-sounding Sachs-Dolmar to 2nd.

Jeff Tracy, Shepparton, Australia, with his Kioritz Twin powered Co-builder Lash restrains Strickers Stearman. The Sachs-Dolmar eng­ Steen Skybolt, using JR radio. Hang one, Jeff! ine alternately roared and putted, adding to realism of Steve's flying. MARCH 1985 11 Doug Ferguson, and his Laser. Was dogged by engine problems for this, his first time at the T.O.C.

Giichi Naruke, Japan, and his Super Chipmunk, which was winner This close-up photo of Naruke's Chipmunk w ill help you to under­ of Best Aircraft Award, and 55,000! stand why he won the Best Aircraft award. editor of M.A.N., and Mr. William G. Ben­ man from Austria named Hanno Prettner was the largest such event yet, with a total nett, Chairman of the Board of Circus Cir­ was the first winner. He won $500 for his of $125,000 in prize money to be divided cus Enterprises, himself a radio control efforts. Through the years, the require­ amongst the contestants. This prize flyer, and sponsor of the tournament. Now ments for aircraft design and flight have money was broken down as follows: ten years old, the Tournament started in changed to keep this challenge fresh and First Place — $30,000 1974 with a then modest purse of $11,000 exciting. The formula has been successful; Second Place — $10,000 and was intended to present a challenge many innovations in engines, radio equip­ Third Place — $10,000 to radio control aerobatic flyers the world ment and aircraft designs were first seen over. A then relatively unknown young and used at the Las Vegas Tournament of Champions. It is truly the Indianapolis 500 or radio control modeling! As the Tournament developed, so did the skills of Mr. Prettner, who won every time in the past. The 1984 Tournament of Champions

John Britt wanted to make sure everyone Donna checks the shopping list while Tony Kalt helicopter team from Japan put on thrill­ knew when his Skybolt was upside-down! Bonetti puts in a flight with his Skybolt. ing demnstrations. This was tricky! 12 MODEL BUILDER The perennial aerobatic competition duo, Sally and Dave Brown, Gunter Hoppe, West Germany, prepares for a flight with his Webra wait for the engine to warm up in his Laser. Bully powered Super Star, from Topp kit.

Benito Bertolani, Lucca, Italy, thrilled specta­ tors, and contestants!!), with barnstorming The only Quadra at meet was in alternate flier demo flights after finish of contest. Mike McConville's Laser 200. He didn't fly.

Fourth Place — $6,500 $3000. Fifth Place — $6,000 In addition, the following supple­ Dave Wilson props the Webra Bully in his Bri- Sixth Place — $5500 mentary awards were to be made: sighella designed Steen Skybolt. Seventh Place — $5000 Best Model Aircraft — $5000 Eighth Place — $4500 Highest Placing Biplane — $5000 by a factor of ten percent. Ninth Place — $4000 This year's event was unique in that for This competition is limited to twenty Tenth Place — $3500 the first time the flight scores of contes­ contestants, ten from the United States, Eleventh through Twentieth Places — tants flying biplanes was to be increased and ten international flyers. The con­ testants from the US are invited based on their individual combined placement in both the 1983 National Masters R/C Pat­ tern contest, and the 1983 R/C Aerobatics Team selection. International competitors are invited from among the top finishers in the 1983 FAI World R/C Aerobatic Cham­ pionships and at the discretion of the con­ test management. The 1984 invitees were: Voichiro Akiba, Japan Benito Bertolani, Italy Tony Bonetti, USA John Britt, USA Slick looking Yak 55 by Werner Schweiker, West Germany, shows strong Laser and/or Super Star influence. Model design by G. Metterhausen. Continued on page 96

Alternate flier, Franz Mayr, w ith his Webra Bully powered Super Diabolo, by Tsugutaka Yoshioka, Japan, former World Champion. Star, was brought into action when Prettner was disqualified. OS 108 FSR Twin power, JR PCM-9 radio.

MARCH 1985 13 • Well, they did it again...for the eighth make us feel at home. Upon remembering representatives from France, Germany, time! 'They" are QSAA, the Quarter Scale the unpleasant experiences many of us Spain, and of course our own country. Association of America, and what they did have had in traveling with R/C airplanes, Both the model display and the activi­ was to host one of the best organized and it is refreshing to come to a place like this. ties at the flying field are similar to other best attended West Coast R/C events of the The Fly-In is listed in the hotel's various Las Vegas type attractions, the extravagant year! One could say that this comes with publications and event boards, there is a shows always being staged all up and experience and this is true to some sign in the casino area in front of the esca­ down the Strip. They both include so degree. But as the size of the event grows lator that leads to the model display area, much action you don't know where to with each year, the logistics of putting on and after the flying starts, directions to the look first, and you constantly have the such a show also grow! QSAA officials field are posted in the same place. Equally feeling that you w ill miss something. took it all in stride, expertly handling all impressive, and welcome, is the prepara­ Some of the Fly-In attractions are rather the polyglot multitude... 181 entries tion and serving of the meal at the Satur­ hard to miss though, such as the 147-inch strong... that descended upon them, and day night banquet, where everyone gets wingspan "Super Constellation" L-1029 by provided us with a perfect "10 Point" served at almost the same time, the food yearly attendee Alex Obolonsky, of Ep- weekend of large and larger R/C "Fly and is warm when it arrives, and the tables are pertshausen, West Germany. As stable as Tell." They were even able to deliver the cleared promptly so that we can get on a Senior Falcon, the "Connie" was pow­ perfect flying weather they had promised, with the program. ered by Webra Longstroke .61's, swinging this year's certainly being the best we have And as in past years, flyers and their 12-8 three-bladed propellers. Alex and had out at Dorado Dry Lake, the estab­ magnificent machines arrived from all crew must have used all of the weight sav­ lished home of QSAA's annual gathering. corners of the country . . . and the world. ing techniques available; as the total As in past years, the Eighth Annual Fly- In total, eleven states were represented, weight is only forty-four pounds. It's realis­ In started with registration and model dis­ from as far away as Florida and Arkansas. tic flight certainly brought back pleasant play in one of the spacious convention Flyers from the countries of Canada, memories, in the days of prop driven rooms of the "Showboat" Hotel/Casino, France, Germany, Panama, and South Afri­ airliners, this airplane was certainly one of which certainly goes out of its way to ca were there, as were model press the best looking.

Do you recognize scale champion Bob Nelitz, of Canada, w ithout his Best Biplane award to Noel Hess, Salt Lake City. The Curtiss F11C-2 Cub? Here’s his new Clipped Wing Taylorcraft, Best Civilian Aircraft. is Kioritz powered, weighs 30 pounds, span is 96 inches.

Another always winner. Forest Edwards, with his Best Mechanical Best Scale winner, George Harlan, Irvine, Calif., with his Monocoupe. Achievement trophy, for five-cylinder radial that powers his Fleet. Weighs six pounds, 96-inch span, powered by Webra 91.

14 MODEL BUILDER M i

Alex Oblonsky, center, and teammates. West Germany, won Best The Super Connie on a landing approach, looking about as realistic M ulti Engine Award with this 147-inch span Super Constellation. as you can get. A magnificent achievement!

More and more ladies gracing the QSAA Fun Fly. "Susana's Cub", Powder Puff winner, Connie Vaughn with her Pitts S-1. Quadra 50. with Susana "CB Associates" Seigelkoff herself. Futaba radio, black, yellow, and orange finish. Beautiful job. Another of the hard to miss models did not have to travel quite so far to attend, having to come only from nearby Tucson, Arizona, accompanied by builder Jerry Kikkert and pilot Billy Hempel. This one was a thirteen-foot model of Col. Bob Thacker's record-setting "Betty Jo" F-82 Twin Mustang. Also a stable flyer, though later grounded by landing gear problems, this Twin Roper 3.7 cu. in., powered big­ gie weighs around one hundred pounds. In spite of the weight, Jerry's twin took to the air as easily as its namesake, and did not seem to lack anything in the thrust or control department. This model uses a dual airborne system, based on the infor­ mation in our April 1983 issue. Not to be missed either was a 14-1/3 foot A Barbie Doll accessory you won’t find in Northrop YB-35 Flying Wing, the "X" toy stores! On Chuck Fuller's Jungmann. model of which first flew in 1946. The "Y" model is the handiwork of Darrell and prefix is that assigned to aircraft in a de­ Merle Meyer, the team that brought you Jerry Gardner's half-size Pitts had to win some­ velopmental stage, one step up from the the much publicized model of the thing! Best Static Display award. purely experimental "X " types. This Howard Hughes "Spruce Goose" Flying Boat. This latest effort is just as exciting and complex, using prop gearing and electric-pump circulated liquid cooling on its four K&B pumper-equipped .61's. It too suffered some landing gear problems, though when it did take to the air it did so with perfect appearing stability and control. Total weight of the Wing is fifty- four pounds. And if Quarter or Third Scale doesn't impress you, how about Half-Scale? That's right, fifty percent size! And expertly done right down to rivets and cockpit operated control surfaces. In this case, the model is Winner of Best Glider award, the LS-4 was flown by Roland Sommer, of West Germany, seen a Pitts Biplane, the results of months of here holding left wingtip. Engine can be retracted by radio. labor of love on the part of Jerry Gardner MARCH 1985 15 Popular Jorg Vogelsang, West Germany, with helper Manfred Topp, How's this for scale documentation!? Full size Bravo by designer left, and his Best WW-I winner, Fokker D-VIII- Weighs 45 pounds. Morrisey, model Bravo by Sig's Maxey Hester. Real look-alikes!

So this is a "Sonerai"! Built by Bruce Schamber, Naples, Florida, Best Sport Scale award went to Jerry Kikkert, Tucson, Arizona. His who also built and flies full size one. Both excellent fliers. P-82 spans 13 feet, weighs 100 pounds, flies on 3.7 Ropers. and some equally dedicated and talented The Marathon of Flight, flown for time all the way from Naples (Florida!) to share friends. First seen in an X-rated (uncov­ and distance over an established 200 mile his "Sonerai" with us. This is his second ered) version at Toledo last year, where it course, was won this year by Harry Dick­ one, the first one he built is in twelve flew away with the Director's Achievement inson and his able crew. Flying a 123-inch inches to the foot scale; and he flies that Award, the Pitts is now fit for family view­ Piper Tri-Pacer, pilot's Ron Meyer and Cal­ one also. In the same vein, there was Max­ ing, radiant in authentic red paint with all vin Orr logged 8.2 hours and 360.5 miles ey Hester's Morrisey "Bravo," a beautifully the markings. It spans 104 inches, weighs before a gas leak forced them to land executed model of another home-built eighty pounds, and is powered by a 22 earlier than previously planned. The lightplane. An extra treat in this case was horsepower "Limbach" engine, swinging model is Quadra powered; Harry esti­ the appearance of the full size article at an also scale 36-12 propeller. This model mates that they burned 3-3/4 gallons of the field, flown in by the owner/builder, was not flown at this time, being entered the 4-1/2 carried aloft at take-off. The radio who later shared some of his interesting in the Static Display category. Jerry stated system was by Airtronics. aviation experiences with us at the that a lot of midnight oil had been burned I certainly don't mean to ignore any banquet. getting the model to its present state in models or to belittle anyone's efforts, Mustapha Hadjab was back with us order to show it here, and a lot of testing space simply does not permit a fuller again this year, all the way from Paris, and checking had to be done prior to the description of all of the great models seen France. His entry was a seldom-modeled first flight attempts. If looks mean any­ and flown this weekend. For example, Stolp "Starlet," sister ship of the more thing, when the fateful day comes, this there is Forest Edwards' Fleet Model 2, popular "Stardustet" Excellent in every bird will take to the air'just like the Space powered by a five-cylinder four-cycle radi­ respect, an additional interesting detail Shuttle on its way to orbit. Good Luck to al engine of his own design and construc­ was the pilot, an exact quarter-scale dupli­ Jerry and his friends! tion. The prolific Bruce Schamber came cate of Mustapha himself, complete with

Addie Naccarato and her Astro Flight powered J-3 won Best Electric South African, Mel Barber, appears every year to take home trophy trophy for third year in a row. Span 105 inches, weighs 9.9 pounds. for travelling longest distance. DC-3 flies extremely well.

16 MODEL BUILDER Erich Dern, from Panama, with his Best Ultralight, a Pioneer "Flight· Best of Show Northrop YB-35 Flying Wing, by Merle and Darrell star". Span is 10 feet, weighs 36 pounds (Light?), Quadra 50 power. Myer, flanking pilot, John Elliot. Span 14-1/3 ft., 54.5 lbs, K&B's.

A beautiful Stolp Starlet, in red and white, won Best Scratch Built Take another look at the photo to the left. It's the pilot of the Stolp! award for builder/flier Mustapha Hadjab, from France. Model uses a Kavan FK-50, with on-board electric starter. curly hair and a neatly trimmed mustache. perpetual and annual trophies are pre­ Volgelsang, West Germany, Fokker D-VIII. Addie Naccarato, from Burbank, Califor­ sented. Such decisions must be difficult to Best Finish (K&B)—Bob Francis, Aptos, nia was also back again, with her Astro make, as many of the prize winners cer­ CA, CAP-21. Flight powered J-3 Cub, to fly off with Best tainly seemed to me to qualify for more Best Scale (Kraft Systems)—George Electric model . .. for the third year! Many than one category; for classes such as Harlan, Irvine, CA, Monocoupe. times previous attendee Jorg Vogelsang, WWI, Civilian, etc., and then also for Best Best Military (George Kileen)—Dwight from West Germany, was here again with Finish, or one of the other awards of that Cathcart, Ceres, CA, FW-190-A4. his big one, this year being a forty-five type. Obviously, the voting was done with Best Stand-Off Scale (Model Airplane pound, 126-inch Fokker D-VIII. It uses an great care, as we all agreed that the News)—Jerry Kikkert, Tucson, Arizona, all tubular steel fuselage, and is authentic models so honored were certainly prize F-82. in all respects, with the possible exception winners . . . and too, this year no one vot­ Best Mechanical Achievement (Larry that some of Jorg's maneuvers would prob­ ed for QSAA President Rex Perkins for the Vance)—Forest Edwards, San Pedro, CA, ably have torn the wings off the full sized Powder Puff Award! Radial Engine. one! Ah yes, it was truly a modeler's real Anyway, at the Saturday Night Banquet, Powder Puff (Anheuser Busch)—Connie life wish-book of projects to admire and to the following awards were presented. The Vaughn, South Gate, CA, Pitts S-l. dream about! parentheses endose the donor of each Junior Achievement (Suma Corp.)— Except for a very efficient frequency trophy. Edmund Root, Las Vegas, NV, Laser 200. control system, and the establishment of a Multi-Engine (Joe Bridi—Model Aircraft Best Scratch B uilt (Billy Root)— take-off direction and traffic pattern, flying Designs)—Alex Obolonsky, Epperthausen, Mustapha Hadjab, Paris, France, Starlet. at QSAA's Fly-In is not controlled or West Germany; Super Constellation. Best of Show (Radio Control Modeler) judged. Each registered flyer is given a Best Biplane (Coverite)—Noel Hess, Salt —Darrel & Merle Meyer, YB-35. ballot card upon which he enters his Lake City Utah, Curtis F 11-2. choice in nineteen categories, for which Best WW-I (Goldberg Models)—Jorg Continued on page 104

a* ■

Marathon of Flight winners (kneeling I to r): Ron Meyer, Calvin Orr, Ralph Perkins. Standing (I to r): Bill Comstock, Harry Dickenson, A Clipped Wing Cub and Morrisey Bravo use pieces of cord to push Keven Comstock, and Jeff Dickenson. Hazel and Maxey out to the flight line. Rex Perkins sets the pace.

MARCH 1985 17 wen) Personally, I think that restrictions like this are not unreasonable. For most modelers, 20 kg or 44 lbs is a limit they w ill never pass anyway, and if one decides to build bigger, it's not a bad idea that somebody competent checks whether the creature is airworthy! Of course, the latter remark goes for un­ der 44 lb. ships too. It does not make a difference whether you are hit by an out- of-control 50 lb. model, or by a wild 30 lb. ship; I bet you won't be able to tell the difference! I would like to present you one of those large models, in this case one that tips the scale at 42 lbs. It is a stand-off scale (well, sort of, at least) model of the well-known Laser 200. This huge model has a wing­ span of no less than 12-8" (3.80 m)! As one of the pictures shows, construction is quite conventional. The two-piece wing is of the built up type, with ribs cut from a dense polyurethane foam, the blue variety which we know as "Roofmate." The ribs are cap-stripped with balsa for added strength, and the remainder of the wing consists of spruce longerons and 1/8-inch balsa. Both wing halves slide on large di­ ameter aluminum tubes, fitted perma­ Jan van Agteren's Laser 2000 came in "E xtra Large" scale! nently to the fuselage. The fuselage construction features plywood formers • At this side of that big pond that's known allowed weight of 5 kg (11 lbs), but now and spruce and balsa longerons, where as the Atlantic Ocean, there is a lot of in­ in Holland as well as in Germany, the necessary covered with 1/8-inch balsa. terest in large model airplanes. Like every­ maximum allowed all-up weight is 20 kg The amount of Top Flite's Fabrikote that where else, it started out with larger than (44 lbs). There are no restrictions regard­ was necessary to cover this ship, was usual models of the Piper Cub type, at first ing engine displacement and/or power. If alarming. At the current rate of the U.S. underpowered by what was available on you want to fly an overweight model, you dollar, the price of the covering alone the glow-plug engine market. Later on, it need a special permit, as such a model is, would buy a very nice model airplane kit! moved up to more suitable engines like legally spoken, no longer considered to Radio installation is conventional; each the Quadra, and the access to better en­ be a model airplane, but a "real" air­ huge elevator half has its own servo, gines made modelers think of other plane. Such a permit is a sort of an air­ as did the ailerons. The radio used is a planes than the high wing, lightly loaded worthiness certificate, to be issued by the German Simprop, the same brand that is types. If you visited a model airshow in civil aviation authorities. (The bold type used by Hanno Prettner. Europe this summer, you would see not in the copy above was done at my re­ Somewhat less conventional is the en­ only a respectable number of Big Birds, quest. This is exactly what I have been try­ gine, fitted to this giant. It's an interesting but a large diversity of subjects too. ing to convince our AMA to do. Refer one, namely a German "AMT KING 100," Legislation has been adjusted to the in­ back to my "Workbench" column in lan- a 100 cm1 or 6.1 cu-inch twin-cylinder terest in larger models as well. Model air­ uary '85 MB. It's nice to know that at least planes used to be restricted to a maximum some organizations are seeing the light. Continued on page 81

If you had any doubts about the size of Jan's Laser from the above photo, this picture will The Laser's powerhouse! This is the AMT King 100, a 6.1 cu. in. engine. Tiny black box on confirm it without question! top of mounting block contains Becker electronic ignition system, working from 4.8 V battery.

18 MODEL BUILDER S teve W ittman’s “BUTTERCUP” Another classic scale design from the early days of R/C, resurrected from the July 1953 issue of Air Traits magazine. A great "Sunday Scale" model for glow or electric and three-channel radio.

• Continuing our revival of some of the main gear and the "indented" wing lead­ races. Buttercup was used to ferry spare ageless model designs published in the ing edge. racing props, extra wheels, other spare great former model magazine A ir Trails, The original two-place "Buttercup" was parts, and tools. we hereby offer Frank Van Buren's version designed by and built under the direction The 45-inch span model plans by Van of Steve Wittman's "Buttercup" which ap­ of Steve Wittman, and was powered by an Buren show some of the early radio con­ peared in the July Ί953 issue. 85 horsepower Continental. The tube-type trol system installation, which can be ob­ Many design features which later ap­ landing gear strut allowed light flexing in served for appreciation of what we have peared in the currently well-known Witt- all directions, and is easy to duplicate in today, but otherwise ignored. Proper ele­ man "Tailwind" become obvious as you scale with simple music wire. Wittman vator and rudder hinge line locations are study the drawings, which were deve­ apparently used this light plane as a fairly obvious. Just install double spars at loped from authentic scale-views by S.C. "hack" to accompany his two midget "Cal" Smith. Note the single-strut tubular racers, "Buster" and "Bonzo" to various Continued on page 107

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CLOTH HINGES 1/16'DlA WIRE PUSH ROD LEAVE OPEN 1/16“ DlA* 1*1/8' DlA WHEEL ESCAPEMENT RUBBER Mc COY Vj L X WINDING HOOK DIESEL 1 / 4 'SO LONGERONS \ ESCAPEMENT UPRIGHTS 8 CROSS ^uHe roup I δ 3/32“ PLYWOOO DOOR ON RIGHT SIDE DMECO'RC BELLCRANK PIECES MED BALSA 2-1/2’ DIA WHEELS MODEL BUILDER _ _ Plan No 1»* I

MARCH 1985 FULL SIZE PLANS AVAILABLE - SEE PAGE 106 19 60SS0MER SLOWPOKE By FRANCIS REYNOLDS . . . First installment of a two-part article about experiments in ultra-slow, radio controlled flight. Nothing here to build, but the author's trials and tribulations may spark some ideas.

• Variety is the spice of life, and it also adds interest to the hobby of model building. For variety, we may build a very small model, a very large model, a very simple model, a very complex model, or a very fast model. This article proposes a new challenge, very slow flying RC airplanes. Incidentally, this is not a construction article, and no plans are provided. If you are looking for another “ best ever’’ trainer or pattern ship, you w on’t find it here; but if you are a bit technically inclined, and your mind is open to new ideas and different goals, you will find this interesting. Many years ago I watched a friend, Slotted rear "w ing" on Gossamer Slow Poke I, as described in text. Don Mygatt, fly his A n tic at the local field on several occasions. Lou Proctor’s A n tic, as you know, has a light wing loading and was considered a big RC model before the 1/4-scale jobs came along. Don had built his A n tic especially light and had a .30 in the nose. His mode of flying this aircraft was to throttle down and cruise around the field, close, low, and impressively slow . The rest of us were ripping holes in the sky with screaming pattern ships and pylon racers. Don’s put-putting slowly around was very appealing. I also once watched Chuck Clemans fly his light, scale D em oiselle at about 10 Slotted forward wings on Gossame Slow Poke I. mph into a 10 mph wind. Fascinating! That is one way to make vertical land­ slow we can fly an RC plane, there are ings. Now some of the 1/4-scale models some good practical arguments in favor are also being flown impressively low, of flying slowly. Perhaps the most im por­ slowly and quietly. tant of these is safety. If you fly models My studies and resulting "Gossamer alone on a large vacant field, and can Slow Poke” models are an attempt to avoid hitting yourself or your car, you carry slow RC to extremes. I’ve had a ball have no safety problem, but most of us jogging alongside GSPII while it is in full have to fly where there are other people. flight, hedgehopping over fences (fence The damage that an RC plane can hopping over fences?), flying it in tight cause on impact is proportional to the circles around myself with the plane kinetic energy the plane has in flight. three or four feet off the ground, and Kinetic energy, you may remember, is in flying it in my yard (with a well-muffled turn proportional to the weight and the and throttled .10). square of the velocity. If we have an If you can fly an ordinary model, flying eight-pound pattern ship flying at 75 a slow model is a breeze (except if there mph, its kinetic energy is over 1500 foot is much of a breeze, then flying a slow pounds, enough to kill a person if the model is no longer a breeze). Flying blow is in the right place. Nine-inch prop on Gossamer Slow Poke I was backwards in gusts is fun, but to fly in a If you want to think about a still more turned by geared G-Mark .03 engine. A ll steady wind which exceeds the model’s frightening situation, assume a little photos taken in May of 1983. airspeed means recovering the model four-pound pylon racer flying at 150 ity and can lead to loss of flying fields. by techniques best known to free-flight mph. It is half the weight, but twice the However, what if we are flying a two- modelers. speed of our pattern ship. Because of the pound airplane at 7-1/2 miles per hour? Some RC sailplanes can fly fairly V2 factor, the pylon racer will have tw/ce The kinetic energy in this case is only slowly, and RC helicopters can hover, the flight kinetic energy of the heavier 3-3/4 foot-pounds, 1/400th the energy but ultra-slow, RC power planes fly pattern modfel. To make it worse, with of the pattern ship, and 1/800th the more like dirigibles than anything else, the higher speed of the pylon racer, energy of the pylon racer! How can including their sensitivity to wind, their getting out of the way becomes much there be such a huge drop from the 3000 slow but sure response to controls, and harder. It is difficult to dodge a bullet. foot pounds of the pylon racer? We their very low fuel consumption. Unfortunately, pilot errors and equip­ reduced the weight by a factor of two, Beside the novelty of flying slowly, ment failures do cause accidents. Even which divides the kinetic energy by two, and the challenge of seeing just how non-injury accidents give us bad public­ but the b ig reduction in energy results

20 MODEL BUILDER from reducing the velocity by a factor of lift to support the airplane at the lowest signing an ultra-slow RC model. What 20, which lowers the velocity-squared possible velocity. configuration shall we select, for term by a factor of 400! That, times the The equation for lift (at sea level on an instance? Before we make that selection factor of two on weight, gives us 1/800th average day) is L = Cl SV2 divided by 391, we first need to look at what makes an the energy of the pylon racer model. It where L is lift in pounds. Cl is coefficient airplane longitudinally stable (stable in would be very difficult to kill someone of lift, S is lifting area in square feet, and pitch). or even injure them with only 3-3/4 V is the flight velocity in miles per hour. The longitudinal stability of an air­ foot-pounds of impact energy. Therefore, to fly as slowly as possible, we plane is a bit complex to understand, Another reason for building ultra- need to maximize the lift coefficient, involving pitching moment coefficients slow models is lower cost. Ultra-slow air­ maximize the lifting area, and minimize and curves, and calculations that we planes have to be ultra-light and need the weight. don’t need to get involved with here. I little power. Although we usually don’t Drag has a secondary influence on think we can understand it in very think in these terms, model material how slowly we can fly. The less drag we general terms, however. costs are roughly proportional to the have, the less thrust and power we will All normally-cambered airfoils are un­ w eight of material we must buy. One- need, the smaller the engine we can use, stable (symmetrical airfoils are neutrally sixteenth balsa is cheaper than 1/4 balsa, the lighter our airplane will be, and stable). By unstable we mean, if a cam­ .lOengines are cheaper than .60engines, therefore the slower it will fly. Antique bered wing alone was flying in a balanced etc. Last but not least, little engines burn aeroplanes were poorly streamlined and condition, and a gust pitched it down much less fuel than big engines. The one had lots of high-drag rigging. Inter­ (decreased the angle of attack), the place where the cost of an ultra-slow RC estingly, they were able to fly fairly center of pressure or center of lift of the plane may hurt a little is in buying the slowly in spite of their high drag, not wing would move back and it would covering material. Ultra-slow planes because of it; yet they were not able to continue to pitch into a progressively need lots of area. fly vry fast because of their high drag steeper dive or "tuck.” Conversely, if We know that to fly fast we need to (and their low power). Such planes have the angle of attack were to be increased minimize the drag and maximize the a poor speed range. Their top speed isn’t for any reason, the lift would move for­ power; but what should we do fly as much greater than their stall speed. The ward and rotate the wing to progressively slow ly as possible, maximize the drag lighter the plane, the lower the drag and higher angles of attack until the wing and minimize the power? Not quite; we the greater the power, the greater the stalled. still have to keep the plane in the air. The velocity range. name of the game is to develop enough Let’s examine how we go about de­ C on tinu ed on page 91

MARCH 1985 21 m <3 ? . i M J i M i By A L ALMAN ' * 3

Sorry I missed being with you guys last overlooked and very insidious... month, but a most magnificent inguinal HERNIA HAZARD hernia had absolutely top priority. The It's true that people of all ages can get operation turned out to be a bit of a bear all kinds of hernias, but as the average BIG because I'd put it off for much too long Bird Lover is in his mid-forties, he's got an (gotta admit to being a professional over-the-hill body to safeguard and a very coward). As a matter of fact I'm still ATs OS FS-120 in Tatone's new engine test real potential safety problem...herniating unit. Of cast aluminum, it's rugged and fuel recuperating, so except for the following due to schlepping overweight BIG Birds proof. OS has CH Electronics Ignition Conver­ note of caution about yet another safety around. sion, runs beautifully. hazard and the product reviews at the end The average age of the 24 members in three years after I first got involved with of the column, GOFB (Good O l' Flying our IMAA Chapter 108, the Puget Sound BIG Birds. Like most everyone else back Buddy) Bruce Edwards did most of the Rocs, is about 47, and within one year six then, I also had heavy airplanes; they all work this month. Bruce, who's a very com­ clubmembers developed right and/or left weighed a good 25 pounds, or more... petent pilot, has been BIG Birding for inguinal hernias. And let me state here and during those early, tinkering days we about seven years and has learned how to that none of us had the slightest hint of also brought most of our shop tools to the get performance and reliability out of the any hernias prior to getting into the BIG field...just in case. ubiquitous Quadra. stuff. This was the first time on the table However...before he does his thing as for my five comrades, while I've been this But don't despair! There's no need for guest columnist, I've got to make sure that same route three times within the past six you to have to sweat a rupture because you're all made aware of the heretofore years...with my first operation coming there's hope and a way to salvation... Nay! Make that two ways to salvation! First, take advantage of, and use, the new breed of large two and four-strokers that are available. We're talking about much lighter and much smoother running engines...so that a properly built 10-12 pound, 8-9 footer is very much a reality. And even if you really screw up and turn out an obese 15 pound toad, a mere 3-1/2 pound engine like the ST-2500 w ill save the day. The second way to salvation and peren­ nial bliss? Simply don't exploit vour bod! Had I known that I was going to live this long, you can bet that I would have taken This great-looking Japanese "Claude" was built by Dwight Ballard, weighs 25 pounds, with better care of myself. Kawasaki Z 2 and has flaps. Seen at Double Nickel Squadron's 3rd Annual Fly-In last Sept And now to Bruce...

Bill Johnson and his new Flybaby. Powered by a small Quadra and Del Bowors, of the Puget Sound Rocs, with his 92-inch span, Saito 45 weighs 21 pounds. Flies great but not too aerobatic. powered Cavalier. A fine trainer combination.

22 MODEL BUILDER Greetings, BIG Bird fans. Here we are e d the International Miniature Aircraft As­ almost on the verge of spring, and if you're sociation's Fly-In Festival in L.A. this past lucky you'll get a nice day for test-hopping summer and didn't forget anything... that brand-new flying machine. How well thanks only to my checklist. Finding out that first flight goes depends on what you you've forgotten something when you're did, or didn't do, back in your shop. 1200 miles from home can lead to a tem­ No doubt you've cycled those Ni-Cds per tantrum...... through a few times during your hiber­ And by the way I had a great time at the nation, so that they're in good shape and festival. Both the picnic and the banquet ready for the new flying season. If not, featured good food and entertainment... don't put it off any longer; get 'em up to and what a surprise to hear IMAA prez snuff! Don Godfrey play lead saxophone so Are you gonna be starting the season well. We had four days of good Hying, with a new engine? Then don't wait till it's although the weather was somewhat too late; bench-run the animal so that you mixed. It was the first time I've ever gotten become familiar with it and get the needle sunburned on a cloudy, rainy day. Up here valves set right. Messing with a new en­ in the Northwest, rain just makes the moss gine that's installed in an airplane puts un­ grow thicker between our webbed toes. necessary wear and tear on the bird... We've come a long way these past few and it's not safe; so do mount it first on years. Not only has the IMAA been recog­ Altech Marketing's new import, Italian-made that strong, heavy test-stand for initial run­ nized by AMA as a special interest group, TRD 40. Initial running indicates this 2.44 cu. which means that a ll BIG Bird Lovers will in. engine has lots of power and low vibration. ning. Also, use fresh/good fuel. Bad, stale Flight test results next month. or contaminated fuel can and w ill give be well represented in AMA matters, but you fits because that engine is going to we also have a fantastic assortment of kits, (if you're really pleased with a product, it run ragged and rough...with low power engines and accessories, tailored just for certainly wouldn't hurt to send a "love- and a very unreliable idle. our needs, on the market now. But it's go­ letter"). But don't rant and rave; do it calm­ Okay, now that you've got the engine ing to take some effort from everybody to ly and clearly so that the guy who makes running well and the radio system in the ensure that we keep on getting quality that particular item knows where you feel green, install everything in that shiny, new items... and the name of the game is to let BIG Bird and secure it to your BIG Bird the manufacturer know if you're unhappy Continued on page 81 Stooge... What's that? You say you never got around to building a BBS? Well, now's a good time to do it. Believe me, this stooge is easy to put together and it's going to protect you from becoming a free lunch for any errant 18x8 or 20x10. I never crank up any biggie without it being safely tied down to my stooge... which in turn is an­ chored to the ground with six inch spikes. Now that your bird is safely restrained, fire her up and check out all the control surfaces and attachments/wires/braces for excessive vibration. After making sure that no controls are hooked up backwards, it's time to fine tune the engine in its new en­ vironment...and a few taxi tests to make sure all your wheels are aligned and run­ ning true (with two-three degrees of toe-in on the mains). When everything checks out okay and you're sure she's ready for that maiden flight...set her aside...and get out an old, faithful bird and go through the same patient checkout and preflight. Sounds like extra work, doesn't it? Well, the idea is to arrive at the field with two aircraft that are fully prepared for flight; and since you haven't flown for a number of months, twenty to thirty minutes of stick time with "old faithful" should clear away the cobwebs and get you prepared for the test hop...which, hopefully, w ill then be a piece of cake. And whoever shares your frequency will appreciate the fact that you did all your homework and won't have to tie up the airwaves tinkering with a balky engine or a flaky radio. Also, you should consider using a checklist. It's an invaluable aid and will keep you from leaving tools, fuel, or your transmitter at home. It'll also prevent tak­ ing off with either your transmitter or re­ ceiver switch off. You can probably make up a good checklist during the Monday night football game commercials. I attend­

MARCH 1985 23 FIG. 1 Airflow in forward flight. FIG. 2 Airflow transition as autorotation is entered. CHOPPER CHATTER By RAY HOSTETLER

• As promised, this month w ill be a com­ a cyclic flare is initiated to decrease the reduced immediately! plete overview of autorotations. First off, rate of descent and reduce the forward Early autos were done without auto­ autorotation is one word, not auto rota­ speed. As a positive by-product, rotor rpm rotation clutches by modifying the cen­ tion. Autorotation is what a helicopter increases momentarily. At the end of the trifugal clutch so it would engage around does when it loses an engine, auto rota­ flare the ground is so close (hopeful lyl) 1/4 to 1/2 throttle. Then when the centri­ tion is when you back your car over your that now the remaining rotor rpm can be fugal clutch released there was still helicopter by accident (or on purpose...)! traded off for a last bit of lift by pulling in enough rotor rpm to maintain flight and (In other words, when your hell engine the collective pitch. complete the auto. stops, you really ought to rotate, wen) MECHANICS NEEDED TO DO AUTOS RADIO NEEDED Secondly, you want to "sneak up" on au­ To successfully transition from forward To do a full down auto without first kill­ tos. Just like the series on forward flight flight to autorotation, you have to have a ing the engine, it is practically mandatory where we made small circles that got big­ helicopter with collective pitch. There is to have a radio with "throttle hold." Snap­ ger and bigger until forward flight was no no way you can autorotate a fixed pitch ping this switch "on" holds the throttle at surprise...that's what we'll do with autos, helicopter because the set pitch in the idle no matter where the stick is moved. too. blades w ill kill the rotor rpm when the en­ This way, at the end of the auto the throt­ BASIC DEFINITION gine dies. tle remains at idle while the stick is ad­ When you are flying along in forward Then you must have an autorotation vanced to give full collective pitch to flight, the rotor system produces lift to sus­ ("sprague" or "freewheeling") clutch be­ cushion the touchdown. The primary ad­ tain flight. When lift is produced, drag is tween the centrifugal clutch and the rotor vantage of the throttle hold is that it lets produced as a by-product. (This is known head. The theory is simple: With only a you monitor the progress of the auto on as induced drag.) There is also profile centrifugal clutch, the rotor engages at the way down. If it looks good, go for it. drag, which is the frictional resistance of low rpm (just above idle). If the engine If not, release the throttle hold and go the rotor blades as they pass through the stops in flight, the engine w ill drag the ro­ around for another try. (The throttle hold air, and parasite drag of the rotor linkages tor down to this idle rpm before the cen­ also avoids the necessity of an engine re­ and fuselage. When (or if) you lose an en­ trifugal clutch disengages. At this time the start after every practice auto!) gine, this drag will instantly start to slow rotor rpm is too far decayed to support Without throttle hold, the only way you the rotor disk. Rotor rpm is the heli­ flight. Splat! can do a full down is by setting up the en­ copter's staff of life and must be kept at all With the autorotation clutch installed, gine so it dies at low stick, low trim. Then costs, so reducing pitch to a minimum 1) the engine drives the rotor system as nor­ when you enter the auto and pull the trim reduces drag on the rotor disk and 2) starts mal, but if the engine quits, the auto­ back, the engine dies and you are com­ a descent which causes air to drive the ro­ rotation clutch allows the rotor to mitted to a full down! The full downs with tor system. Altitude is lost so that rotor continue to spin as the engine dies. Rotor engine off are best left to those who have rpm can be maintained. rpm is lost as drag decays it. This happens done quite a few full downs and have When the helicopter nears the ground, very quickly if the collective pitch is not some experience.

FIG. 3 Airflow stabilized in the auto. FIG. 4 Airflow in the flare momentarily increases rotor rpm.

24 MODEL BUILDER Steady state auto,I \ -

Start of the flare

Rotor rpm decays as flare parallels the ground

Level and pull pitch ^ \ \ V-""

FIG . 5 rmal auto profile. FIG. 6 Auto profile with high forward airspeed. ELEMENTS OF THE AUTO makes it a guessing game as to whether The autorotation can be broken down the flare will be in a "downdraft" or an into three basic units. 1) The entry, 2) the "updraft," each of which can give a hard descent, and 3) the flare and touchdown. landing. Let me preface this section by stating that To judge the rate of descent accurately if the entry is not right, the descent will be means that everything has to be stabilized. Low forward airspeed makes flare erratic, which will blow the flare and Put another way, the helicopter must be in less effective in breaking touchdown. Likewise, if the entry is OK a "steady state autorotation." For any com­ the rate of descent but the descent is not stable, the flare will bination of airspeed and collective pitch, not be timed right. And if the flare isn't the rotor rpm and rate of descent w ill timed right, you'll smack the ground... stabilize. THE ENTRY Full size birds are limited to approxi­ The entry is critical because it deter­ mately 10% above to 10% below normal operating rpm for autos because of rotor mines more than anything else where the S touchdown point will be. If you can't blade and hub structural limitations. On judge where to enter, forget about hitting the other hand, models have no such lim­ a spot. The entry is initiated by sm oothly itations, so rotor rpm can vary much more, particularly on the high end. Since full W ______reducing throttle/collective to full low. Too FIG. 7 Auto profile with low forward many people rush this step, which blows size helicopters are limited on rotor rpm, airspeed. the entry. The only time this should be varying the airspeed is the only other vari­ done ASAP is if you actually lose the en­ able to help hit a spot. Now models can descent, the flare must be right on target. gine. At the reduction of pitch, the pitch also vary airspeed to hit a spot, but con­ Autos do not have to be done this way to and roll attitudes should be straight and sider a model that is set for - 4 degrees of be successful! As sport fliers, we are not level. Entering the auto nose high or nose pitch. Advanced pilots can use -2 or -3 concerned with hitting a three-foot di­ low should be avoided, because improper degrees at the start of the descent. Then if ameter pad every time we do an auto. In pitch attitude messes up the rate of de­ they see they're going to overshoot the the autos I'll describe later, we'll shoot for scent right from the start. spot, they can decrease pitch another a more realistic glide angle which makes Forward airspeed should be moderate, a degree or two, which will increase the ro­ the flare timing less critical. Let's look at nice smooth cruise is fine. Too fast can tor rpm, giving a higher rate of descent, this third part of the auto in greater depth. lead to pitch overcontrolling, while enter­ and a shorter glide. THE FLARE ing slow is OK as long as you have If you've seen experts shoot autos, most As we saw in the introduction, the flare enough forward airspeed to keep the flare of them run this amount of negative pitch serves to reduce the rate of descent and effective at the bottom. More on this later. because the steep angle generated in the bleed off the forward airspeed. In a As the entry progresses, the airflow glide (like a brick) helps them hit the spot properly executed flare, the rotor rpm will around the rotor disk changes. In powered more accurately, and the high rotor rpm be momentarily increased as the disk is flight the air is essentially sucked in from gives the ability to juggle the exact touch­ above. See Figure T In the transition to au­ down point. Because of the high rate of Continued on page 98 torotation, the airflow changes from Figure 1 to straight on (Figure 2), to the airflow coming up through the disk from below (Figure 3). During the second or two that the airflow transitions at Figure 2, the only thing that drives the rotor disk is the inertia o f the blades. (If you put a pin- wheel out of the car window and hold it face to the ground, it won't turn.) In Figure 3 the relative (oncorhing) wind has fully transitioned, the rate of descent is stabi­ lized, and the incoming relative wind drives the rotor disk. THE DESCENT The descent looks simple, but it is a very subtle important point of the auto. During the descent the forward airspeed is set as desired, and most important, the rate of descent is judged to set up for the flare. Doing autos on very gusty days is bad news for models as well as full size Robert Gorham sticks another one on the pad during autorotation demonstrations at Merced. birds. When the descent rate changes, it This is the Jet Ranger body on Cobra mechanics, as described last month.

MARCH 1985 25 El Primero One-Design Contest By BILL FORREY

Group photo taken at beginning of contest. Look at all those El Primeros !

• The Desert Union of Soaring Thermal- ists, who fly in the Palm Springs/Palm Desert area of Southern California, held a very fun, low-key contest for a single­ design glider on December 2, 1984. The design chosen was a beginner's kit called the El Primero, which in Spanish means "the first." The purpose of this event was to involve as many new fliers as possible in club-related activities, foster an interest in R/C Soaring among local power fliers, gain some exposure for a really fine sail­ plane, and most importantly, to have some good old fashioned soaring enjoyment. In spite of the fact that this event got very little "hype" in the various club news­ The top six (I to r): Sam Niece, Dan Metz, George Ritter, Dave Johnson, Bill Forrey, and Dave letters and magazines (I gave it a mention Ingram. Use of one design tends to level competitive advantage. in my October column), there was a big turnout. By count of the entries, there magazines. veloped with the beginner in mind for were 28 fliers present and 25 airplanes Before I go on with an account of what ease of construction, durability, and stabil­ flown (obviously some were shared). This happened at this contest, perhaps it would ity. All of these qualities are well ex­ makes this event one of the largest single­ be a good idea to go over the details con­ ecuted. design contests in the Southern California cerning the design chosen for the event. The El Primero is a two-piece wing, two- area in recent years. I would feel confident The El Primero design was worked out by meter span, polyhedral floater. The wing in saying that with little more exposure, the manufacturer, Buzz Waltz, of Palm rod "keepers" or tube receivers built into there could have been 50 to 70 fliers Springs, California. Buzz has been a com­ the wing roots are unique in my experi­ present, easy! Perhaps next time there will mercial sailplane designer for years, work­ ence. They are hardwood strips, four per be! Watch for the announcement of future ing with Joe Bridi and others on many side for two rods, measuring 3/16 x 1/2 one-design contests in this and other different designs. The El Primero was de­ inch each and having an 1/8 x 1/16-inch

Beauty event semi·finalists. Many more of those present could have And the beauty event winners (I to r): George Boss, Chris Ritter, been included! and Rex Powell.

26 MODEL BUILDER John Werries and Bob West, from the "strictly power" club, the Designer and kitter of the El Primero, Buzz Waltz, launches his Palm Springs R/C Fliers. Note the "Body English". from the heavy-duty hi-start No problem.

Just in case you h a d n 't noticed! Buzz spon­ sored the contest, and the hosts were the DUST members. ners for best appearance. All standard and mini radio receivers and servos will fit, and the nose will accept 500 mah battery packs. The empennage is extremely simple. All surfaces are 3/16 balsa sheet and strip wood. If you spend more than 20 minutes Buzz Waltzes El Primero on an overhead on these surfaces, you aren't paying atten­ fly-b y. tion to your building! Numero Uno El Primero piloto, Sam Niece To order your El Primero, send $24.95 receives the spoils of victory, a four-channel dadoed slot cut down the center. This slot Airtronics radio, from "The Buzzer" himself. is then drilled round with an 1/8-inch drill (Calif, residents add 6% for sales tax) to after the two halves of each keeper are Buzz Waltz R/C Designs, 255 N. El Cielo, joined with glue. I had my doubts as to Suite 476, Palm Springs, CA 92262, (619) Modelers (Banning, Calif.) and Palm whether this arrangement would hold in a 325-5494. Fast turnaround is assured. End Springs R/C Fliers. The rest were sailplane severe load situation, but to my surprise, of commercial! pilots with at least some experience in fly­ it does, and it is a whole lot simpler to in­ What I have just written may sound like ing gliders. stall than any other wing rod joiner tube some kind of mini product review, but I The contest got underway at about 9:00 I've ever built. Yes, the two 1/8 music wire realize that many of you have never seen a.m. with the beauty event. All of the El joiner rods are sufficient for most launch­ an El Primero, as it is a fairly new design. Primero models were lined up wing tip to ing devices such as heavy duty hi-starts, This will give you a better idea of what it wing tip along the crowd restraint rope, and most of your common, club winches. is, and how it is constructed. and judged (by Bill and Kathy Forrey). They will bend under severe launches, One more thing! If you prefer a plastic About ten semi-finalist models were however, as they are intended to do to pre­ canopy over the stock balsa block canopy, selected and grouped together for a pic­ vent the destruction of the wing. This is a then include another $4.50 with your ture, and then the winners were an­ nice feature for beginners who may not order (plus $1.50 for postage if ordered nounced. George Boss (San Pedro, Calif.) know how much line tension is enough. separately). This really enhances the ap­ won first place with his beautifully paint­ The ribs are made by the time-tested pearance of the plane. I recommend it! ed and polished plane. The colors were and preferred method of machine cutting So now that you know a little about the primarily red with yellow, orange and and sanding. They are accurate and flaw­ kit, you probably want to know how the black trim (flying surfaces were Mono- less. All spar notches are cut for the one-design contest fliers did. Well, to a kote, naturally). Second place was Chris builder, and 1/8 x 3/8 spruce spars (I- man (there were no female contestants), Ritter and his model which was done in beam) are provided. The airfoil is flat- they all enjoyed the contest. There were blue, yellow, red, and white, to look like bottomed and 11% thick. many who had never flown a contest be­ a PT-19 trainer. Third place was won by The fuselage is also precut for the fore, and quite a few others who were fly­ Rex Powell, with his black and red Mono- builder and is the usual box-like structure. ing R/C aircraft for only the fourth or fifth The 1/4-square stringers inside the fuse­ time. About six of the fliers were "strictly" lage allow for ample rounding of the cor­ power fliers from the Pass Area R/C Continued on page 101

MARCH 1985 27 Identical molded fiberglass two-meter ships, built and designed by Soon to be published in Flug & Modell Technik magazine, the Floh Herbert Heil (left) and Ralf Markwort. See text (Flea). See te x t fo r details.

By BILL FORREY

• This month we will continue with a real been active since the early seventies. the town where Dr. Helmut Quabeck potpourri of soaring topics from the mail- Chris was one of the first ten LSF Level V's works, and as you might expect, he was bag, all of which should prove interesting (in 1979, I think), attended many SOAR able to meet and talk with Dr. Quabeck. to glider types everywhere. Nats, Great Races, and in the Southern Chris reports that all the German fliers are CHRIS ADAMS REPORTS California area, scores of SC2 contests. extremely nice, enthusiastic, and patient The name Chris Adams w ill ring bells Well, he is still very active in model sail­ with his rough German. If you have ever and bring back memories in the minds of plane flying, but in a different country! attempted to read technical German, you many R/C Soaring enthusiasts who have Chris is now "Dr. Adams" and is very ac­ can sympathize with both parties as they tively tracking down some sort of "target molecule" in the field of conductive, or­ ganic chemistry in the Federal Republic of Germany (West Germany). / Dr. Adams has sent in several letters from "over there" containing much good information about F3B and slope soaring, about construction techniques, and sail­ plane design. Perhaps I can fit most of it in this month. The slope pictures were taken near Nieder-Ulm outside Mainz which I read is a "local" slope in Chris's letter. He is studying in Darmstadt. It is interesting to see so many F3B-like sailplanes being flown over the hillsides of Germany. As you would expect, Chris is traveling all over Europe talking to the modelers, seeing the castles, and generally having a great time visiting foreign lands with his The Floh joins another glider in flight over wife, Ellen. On one trip, he was in Baben- Dohle 84, designed by Dr. Helmut Quabeck, the West German town of Nieder-Ulm. hausen to observe an F3B contest. This is modified (T-tail) by Herbert Heil. See text.

Inside of Ralf Markwort's and Herbert Heil's two-meter ships. Wing Floh interior. Front two servos control V-tail from Tx mixer. Rear mounts atop molded pylon. See text. servos control mixed flap and aileron functions (flaperons).

28 MODEL BUILDER Lewis Clark, of Lutmi Enterprises, and cross-country sailplane , the All parts pre-cut, kit style, for Ted Stinson's little Dragonfly glider. Vygeur prototype. See text. Futaba transmitter gives idea of size. try to communicate the details of the vari­ ous models. The contest was a kind of semi-finals to determine who could fly against the Germans national F38 team in the "higher class." The goal, of course, to displace them. In Chris's words: "The Germans were flying a modified F3B rule contest. Speed was tw o laps, o f which the best here did 10 seconds. Qua- beck says the team does 9 or less. Dura­ tion was six minutes as per the usual rules. Distance, however, was flow n man- on-man, with a random draw to deter­ mine who you were to fly against, and that is how it remained for the rest of the contest. Distance was as many laps as possible in four minutes, normalized for the flight group. The highest was 17 (laps), and Quabeck quoted the best normally do about 20 (!). I tru ly believe this as I see A large SB 11 at home on the equally large how the planes perform. Most planes slopes of West Germany. were a modified 'Dohle' with most having V-tails. The others had T-tails, and I'll drop as forgiveness in hard landings. An impor­ you a sketch of how the T-tails are made tant design feature is the use of a metal Bobby Gerbin, Anaheim, California, and his strong for possible construction notes in sleeve on the outside of the post at the THREE 1st Place trophies won at the '84 Re­ the magazine. (See sketch herewith, wfr) pivot point. This feature prevents the post no Nats. Recognition deserved and delivered! Almost all were three meters or larger, wide chords, but no polyhedral designs. Most flew flaperons, but others had flaps and ailerons or switches to change functions. "I saw Decker's model being flown by the chap who made the molds and most of the ship. That sailplane was quite light; a true piece of quality workmanship as you saw at the world championships in York. I was amazed at how little ballast everyone was using. Not more than a pound was added by the majority. "I have a few radical ideas, as I normally have, and I'm trying to work out the de­ sign bugs on an F3B ship I'll build when I return. I'm also working on a computer program for storing airfoils, plotting co­ ordinates, and viewing airfoils by over­ lapping them. It will be great for my library." T-TAIL ARRANGEMENT ON MODIFIED T-TAIL ARRANGEMENT DOHLE on Herbert Heil's Modified Dohle The above mentioned sketch is D raw n by C hris A dam s described by Chris as follows: "Above is detailed the use of a carbon fiber rudder post as the structural support on some Eu­ ropean T-tail F3B glider designs. The sup­ port shows good torsional rigidity as well

MARCH 1985 29 X y 1. o o o o o - . o o o o o . 0 0 0 0 9 .00100 . 9 9 6 7 4 . 0 0 0 2 7 . 0 0 1 8 1 - . 0 0 9 4 3 . 9 8 7 0 6 . 0 0 1 1 8 . 0 0 9 3 2 - . 0 1 0 4 8 . 9 7 1 2 2 . 0 0 2 9 3 . 0 2 2 3 9 - . 0 1 9 0 6 . 9 4 9 9 9 . 0 0 9 6 4 . 0 4 0 6 1 - . 0 1 8 9 4 . 9 2 2 6 4 . 0 0 9 3 6 . 0 6 3 8 1 - . 0 2 2 0 3 . 8 9 0 9 0 . 0 1 4 0 9 . 0 9 1 0 0 - . 0 2 4 2 7 . 8 9 4 9 3 . 0 1 9 6 0 . 1 2 4 3 9 - . 0 2 9 6 7 .8 1 9 3 1 . 0 2 9 8 9 . 1 6 1 1 9 - . 0 2 6 2 9 .7 7 2 6 1 . 0 3 2 9 9 .20200 - . 0 2 6 1 0 . 7 2 7 3 9 . 0 3 9 9 8 . 2 4 6 3 9 - . 0 2 9 3 1 . 6 8 0 2 1 . 0 4 6 9 8 . 2 9 3 7 6 - . 0 2 3 9 9 . 6 3 1 9 8 . 0 9 3 3 7 .3 4 3 7 1 -.02221 . 9 8 2 0 3 . 0 9 9 7 1 . 3 9 9 6 9 - . 0 2 0 0 9 . 9 3 2 0 4 . 0 6 9 4 1 . 4 4 8 9 9 - . 0 1 7 6 9 . 4 8 2 1 3 . 0 7 0 2 9 . 9 0 3 1 2 - . 0 1 9 1 4 . 4 3 2 7 9 . 0 7 4 2 2 . 9 9 7 4 3 - . 0 1 2 9 2 . 3 8 4 3 8 . 0 7 7 0 6 . 6 1 1 2 7 - . 0 0 9 9 4 . 3 3 7 9 0 . 0 7 8 7 0 . 6 6 3 9 9 - . 0 0 7 4 9 . 2 9 2 9 0 . 0 7 9 0 2 . 7 1 4 9 9 - . 0 0 9 2 6 . 2 4 9 7 0 . 0 7 7 9 6 . 7 6 3 9 0 - . 0 0 3 3 2 . 2 0 9 4 4 . 0 7 9 9 6 .8 0 9 0 1 - . 0 0 1 7 2 . 1 7 2 C 8 . 0 7 1 8 4 . 8 9 0 8 7 - . 0 0 0 9 1 . 1 3 7 8 9 . 0 6 6 8 9 .8 8 8 9 1 . 0 0 0 3 1 . 1 0 7 0 6 . 0 6 0 7 6 . 9 2 1 4 0 . 0 0 0 7 9 . 0 7 9 9 0 . 0 9 3 6 0 . 9 4 9 0 9 . 0 0 0 8 6 . 0 9 6 9 9 . 0 4 9 9 6 . 9 7 1 0 4 . 0 0 0 7 2 . 0 3 7 1 3 . 0 3 6 8 3 . 9 8 7 0 3 . 0 0 0 4 2 . 0 2 1 7 3 . 0 2 7 6 6 . 9 9 6 7 4 . 0 0 0 1 3 . 0 1 0 4 2 . 0 1 8 3 9 1 . OOOOO -.OOOOO . 0 0 3 1 9 . 0 0 9 2 7

LENTICULARUS CUMULUS FAKUS - Classic wave cloud formations formed Ft£y. Ί 0 > - VeLOC-m DlSTTlBoTlO^^ FoR by stable, low velocity air with insuf­ ficient vertical component; usually dis­ T tie s>3o - \o z > -& i. covered at the cost of a high aero tow. from shattering or splintering under ad­ given him problems in mounting and BITUMINOUS CUMULUS - Billowing verse loads. The post is attached through packing. clouds of smoke with strong lift but lit­ the entire fuselage and epoxied in place. SOARING DEFINITIONS: tle oxygen. This procedure lends itself well to built-up SAVE FOR REFERENCE FRACTO CUMULUS - Orographical cu's fuselage designs with spruce stringer sup­ Chris included a small clipping taken stuffed with rocks. ports (see drawing). European modelers from the Southern California Soaring As­ CUMULUS TERRIFICUS - Soaring a then use a fiberglass rudder-fin shell for sociation (a chapter of the SSA) newsletter, go-go. lightness as no additional strength is "Thermal," May-June, 1984. Have a few CUMULUS MAMMANTUS - Soaring a needed. The overall result is a light, laughs! no-no. strong, and dependable tail group. Best of CUMULUS ACCRAVATUS - Large, build­ ALTOSTRATUS OPACUS SQUELCHUS - luck in designs...Chris Adams." ing cu's just beyond your reach. High, thin overcast which moves in Chris later suggests that a variation on CUMULUS TEMPTATIOUS - Large, well and flattens those beautiful cu's when this theme could be used for V-tail designs formed cu's which lure you from your you are halfway to your goal. as well. intended course and have nothing but STRATUS SNEAKUS — Stratus which slips By now he has finished building a two- sink underneath. in beneath you just as you locate the meter glider using the Quabeck HQ- CUMULOFECES — Similar to above, but best part of the wave. 2.5/10 airfoil. Says it looks nice, and would brown in color. have preferred a V-tail for looks, but that CUMULUS CONCESTUS - Single cloud would have added too much weight and with two or more sailplanes below. C on tinu ed on page 85 30 MODEL BUILDER 1. Gorgeous shot of Ken Sykora's "Miss Canada” gliding in for a landing. Photo by Mikkelson. 3. Well built Scientific "Miss Worlds Fair" by Yes, it's very Korda-like. Dick Siefried. Taken at SCAMPS Annual.

• No question about it, contests are the Jim Adams, the outstanding SAM Speaks places to get the best photos, latest in­ Newsletter Editor, with a little seen En­ novations, and the present state of the art glish design called "Isis" (Photo No. 2). in flying. Imagine going to Condor Field This was designed in 1939 by Houlberg, one of the outstanding British rubber men. 4. Phil McCary with Smith M ulvihill Stick at Taft and finding no less than three Winner, at Taft. Mikkelson photo. different contests going on the same day: No reports on how the model flew. AMA F/F, Old Timers F/F, and O/T R/C, More rubber models were to be found with all meets enjoying good attendances. between the cars. Cot a real nice photo of This writer ran out of film as there were Dick Siefried with a very well built Scien­ "gold." so many good subjects. Later on, between tific Miss Worlds Fair (Photo No. 3). This Photo No. 4, again taken by "Jasper" discussions of meets, we'll get a bunch of design is one of the better flyers of the line Mikkelson, shows McCary with a good them in. that included All American, Oriole, Fire­ flying Smith Mulvihill Winner. Examina­ The free flight old timer area was the fly, Flea, and Clarion. One of these days tion of this model will show the wing has first visited and this columnist was struck someone w ill stage a Scientific-Only Rub­ a close resemblance to the Baby Playboy by the variety of rubber models entered. ber Contest. There certainly are enough outline. For that matter, you could say all Thanks to R.j. Mikkelson we have Photo models (not all mentioned) to hold a full the Cleveland Balsa Butchers designs were No. 1 showing SCIF Newsletter editor Ken fledged meet. similar, as all used the multi-spar con­ Sykora's "Miss Canada" doing a beautiful It was a real pleasure to see Phil McCary struction. fly-by. The design somewhat resembles back in harness at Taft. Phil has spent the We didn't have time to get results, but Dick Korda's very successful Wakefield last four or five years in the Reno-Carson we will list winners next month. Most winner as kitted by Megow. The Miss City area. Originally from Beverly Hills, photos were from the SCIF meet, but it is Canada, of course, was originally kitted by his line of business (Geology) took him to really hard to tell the difference between a Canadian concern, Easi-Bilt. Quite a few Nevada for mining and oil studies. How­ SCIF and SCAMP annuals as most all of of their designs are still available. ever, when that petered out, Phil came the same modelers turn out for both Also seen at the registration desk was back to the Golden State in search of that meets.

2. "SAM Speaks" editor, Jim Adams, with his "Isis", a British design 5. Tom Vincent takes a ribbing from fellow SAM 20 members for by Houlberg, well-known Wakefield man. Mikkelson photo. using Eut Tileston's "discard"!

MARCH 1985 31 6. Eut Tileston with neatly constructed 1/2A Texaco version of 8. A standard Cox .09 powered Strato Streak by Al Heilman. Flies Weathers' Westerner. Dowling photo. w ell fo r a Class A.

went to Tom Vincent, as he tied Eut Tileston and forced a flyoff in two events. Photo No. 6 depicts Eut Tileston with his 1/2A Texaco entry, a scaled Weathers Westerner. Note that Eut has done about everything needed to win: good flying de­ sign, right size for engine, weight held to 16 ounces or less, engine cowled and best of all, a folding prop! Eut has gone a step further in selecting the ideal model for the Antique Event, i.e., the New Cyclone Lancer of which we are again running another photo as seen in Photo No. 7. Lancers were originally produced in 49 inch and 72 inch versions. Tileston has scaled the models both ways (up and 7. The Lancer, by Eut Tileston. A sensational winning design. Has terrific climb. Eut has built down) with the initial success in Class A them in all sizes Limited Engine Run. The model shown SAM 49 FALL ANNUAL proceeded to show the boys how to win here is for the Antique Event using an OS Getting back to the other side of the an event(s). One of the most startling 90 four-cycle engine. The model perfor­ field, the writer arrived just in time for the climbs was to be seen on his OS 90 four­ mance leaves nothing to be desired, terri­ pilots' meeting where a multi-type entry cycle powered Lancer, which actually fic climb and good floating glide. was being opposed by the majority of climbed past vertical and practically out Needless to say, Eut Tileston won the flyers. Finally, on a vote, it was decided of sight! Texaco Event in a fantastic performance of that no more than one model could be en­ Eut is a member of the Northern Cali­ two straight thirty minute flights. Eut is tered per event per contestant. The one fornia A.M.A. Stunt Team, and as such, is now the proud possessor of the Bent Prop exception to this was the allowance of a a superlative flyer. With his background Trophy. This trophy was conceived and second model if the first broke up. and the models powered as they are, Eut given by Jack Jella quite a few years back However, all flying time on the first model is invincible! when free flight and radio control both was to be scrubbed and the second entry Photo No. 5 shows the boys poking fun competed for the trophy. This was quite treated as entirely new. at Tom Vincent, who inherited Eut successful until the R/C boys finally won It didn't take any great oddsmaker to Tileston's OS 90 four-cycle powered the trophy after several years of trying. Af­ figure out who was going to win this Westerner. Eut can be seen on the left, ter that, it was quite obvious the R/C boys meet. After his spectacular wins at the with Nick Nicholau and Bud Hadl finger­ could win, as the caliber of flying had im­ SAM 30 Annual at Marysville, Eut Tileston ing the "illegal" model. The last laugh proved to the point where half hour flights

10. Well built Lanzo Bomber by Gerald Martin, Hereford, Texas. 9. A Dick Tanis "Yankee Clipper" by Larrie Schaeffer, is a good Seen at the Rocky Mountain SAM Annual. performing model with an Anderson Spitfire up front. 32 MODEL BUILDER 13. The Allentown meet of August 1, 1937, showing the boys up bright and early to check their models out. Dig the running board luggage rack!

CLASS C 1 Eut Tileston (Lancer/OS 90 4C) 21:00 2. Tom Vincent (Westerner/OS 90 4 0 21:00 3. Don Hoyle (Mite/Atwood 60) 21:00 ANTIQUE (ORIGINAL IGNITION) 12. The Kloud Queen showing that it knew all 1. Otto Bernhardt Lanzo R.BTMcCoy 60) 27:53 2. Don Carll (Dallaire/McCoy 60) 21:02 about gaining altitude fast 3. Al Heilman (Lanzo Bomber/Spitfire) 4:45 1/2A TEXACO 1. Eut Tileston (Westerner) 30:00 2. Tom Vincent (Boehle) 29:37 3. Bud Hadl (Shrimpo) 29:19 TEXACO 1. Eut Tileston (Lancer/OS 90 4C) 60:00 2. Ross Thomas (Lanzo Bomber/O & R 60) 55:09 3. Tom Vincent (Dallaire/OS 60 4 0 50:51 ELECTRIC 05 1. August Fabian (Playboy/Astro) 16:55 2. Roland Boucher (Playboy/Leisure) 16:12 3. John Pond (Playboy/Leisure) 6:14 ELECTRIC TEXACO 1. Ross Thomas (Playboy/Keller) 25:35 2. Bob Sliff (Playboy Cabin/Astro) 18:01 3. August Fabian (Yates/Keller 50) 16:01 Needless to say, Eut Tileston was the star of the show. Those Lancer models of his are something else! 1985 SCHEDULE 11. May 6, 1939, and Mickey De Angelis is Seeing this column is quite Pacific 14. Gas powered version of the Jimmy Allen rightfully proud of his two-year-old Kloud Coast oriented as far as contests go, Jack "Bluebird.” Hot flier with an OS 40. Rumor­ Queen having registered 150 flights. Albrecht, SAM Contest Coordinator has ed to become a Hobby Horn kit. supplied the following schedule of major were quite commonplace. O/T R/C contests for 1985: Apr. 27-38 — 49er Spring Annual, Taft While on the subject of thermals, Al Jan. 26-27 — Southwest Regionals, SAM 49 Heilman, as seen in Photo No. 8, flew in Buckeye, Az. SAM 31 May 18-19 — SAM Champs Warmup, the afternoon into some rather ominous Feb. 24 — O/T Spring Annual, Alpine Madera SAM 21 clouds. The lift was splendid for this fast SAM 41 June 24-27 — SAM CHAMPS, Madera flying small model. Heilman used a Cox Mar. 9-10 — O/T Spring Annual, Marys­ SAM 09 Medallion to power the model and ap­ ville SAM 30 Sep. 21-22 — Pond Commemorative, pears to have the right combination. One of the interesting features of this contest was the introduction of the Elec­ tric Texaco Event. This new event was held in conjunction with the standard electric 05 event, rules for this event having been published and presently being tested on a probationary basis. The “gimmick" in the electric Texaco event was that one could turn his motor on and off as many times as the batteries would last. This encouraged August Fabi­ an to bring out a Yates 10-Ft. Cabin with a Keller 50 motor utilizing 24 batteries! Wotta pack! You have to have some power to move that huge model. In response to requests to feature model and engine combinations, the following results are presented: CLASS A 1. Al Heilman (Strato-Streak/Cox .09) 21:00 2. Ross Thomas (Sunduster/K & B .19) 17:07 3. Eut Tileston (Lancer/Elfin 2.49) 16:36 CLASS B 1. Ross Thomas (Sunduster/Johnson 29) 21:00 2. Eut Tileston (Lancer/Enya 46 4 0 19:40 3. Don Carll (Playbcy/McCoy 29) 18:07 ANTIQUE (CLOW) 1. Eut Tileston (Lancer/OS 90 4 0 30:00 2. Tom Vincent (Westemer/OS 90 4 0 30:00 3. Bob Angel (Lanzo R.B./OS 90 4 0 28:03

MARCH 1985 33 15. R.B. McKenna sent this shot of his Cleveland F11C-2 Curtiss 17. David Reynolds, Melbourne, Australia, won Beauty Event with "Goshawk". A real colorful bird. this Taibi Powerhouse at Southwest Regionals, V ictoria Vandenberg SAM 26 Oct. 5-6 — Marin County Annual, Olive SAM 27 Oct. 26-27 — Fall O/T Annual, Marys­ ville SAM 30 Nov. 16-17 — 49er Fall Annual, Taft SAM 49 As can be noted when comparing to the 1983 schedule, the Salinas group will not be putting on their annual, instead run­ ning the SAM Champs. Also the "fly-for- Bucks" meet at Colusa held in July has not been firmed up. The foregoing list concerns only the major contests quali­ fying as two day meets or better. The list is provided so that local clubs may sched­ ule their activities around the major meets. Hopefully, we will get a list of the scheduled meets of the East Coast (New Jersey, et al) area. All you have to do is to 16. SAM 29 member, Bruce Norman, at the write! O.T. R/C events, '84 Reno Nats. Lanzo Bom­ ber is Ohlsson 60 powered. Schroeder photo. FIRST ANNUAL ROCKY MOUNTAIN CHAMPS we will simply acknowledge the big win­ After a considerable length of time, we ners, such as Chuck Brannon winning first have finally heard from SAM 1 (One of in Antique R/C, first in 1/2A Texaco, and the original SAM chapters) regarding their second in L.E.R. Chuck and his son come Rocky Mountain Sam Championships. down from Wyoming for the Denver Larry Schaeffer has kindly sent the results meets. and accompanying photos. Great Stuff!! The big winners in Free Flight were Les Just what the doctor ordered to get away Payne (first in Class ABC Cabin, First in from that provincial look in the column. Class ABC Pylon, second in Towline, and 18. Paul Stranev placed third w ith his veteran Being the first Rocky Mountain cham­ second in .020 Replica) and Larrie flier, "Jim p", a local design. pionship staged by this club on October Schaeffer, who picked up what was left by 7, the turnout was encouraging enough to taking second in Class ABC Cabin, third dimensions have been taken directly from warrant a championship meet for 1985. in Class ABC Pylon, Second in Hand the original engine. This particular model Larry says the tentative dates for next year Launched Glider, first in Towline, and first had an air induction hole drilled in the are Sept. 7 and 8th. More on that later. in .020 Replica. Four modelers took 15 bottom of the shaft housing, the first This columnist dearly loves to run pho­ places out of 21 slots. Not a bad haul! model relying strictly on sub-induction for tos of little seen models and Photo No. 9 air. of a Yankee Clipper by Larrie Schaeffer is ENGINE OF THE MONTH Howler engines featured a patented fuel just the right answer. This design, by Dick We are again indebted to "Red" feed system. This fuel, metered by a nee­ Tanis, of New Jersey, is powered by an An­ Gariough, MECA District 2 Coordinator, dle valve, enters the crankcase by means derson Spitfire and, of course, radio con­ for the use of this month's subject, the of holes drilled in the crankshaft and trolled. Howler racing engine. crankcheck; the hole in the crankshaft Also noted on the field was Gerald Mar­ Although Joe Wagner, in compiling his registering with the hole in the bearing tin, all the way from Hereford, Texas, as American Engine Index, lists the Howler housing once every rotation. seen in Photo No. 10 with a Lanzo Bom­ in two versions, 1946 and 1947, this writer Thus, a definite quantity of fuel is eject­ ber. Gerald's model flies quite well as at­ was unable to find it in Model Airplane ed from the crankcheck into the crank­ tested to by the win in Limited Engine Run News or Air Trails. Finally, after two hours case. The fuel supply is definitely and a second in Antique. This columnist of searching, a full page advertisement disconnected from the mixing chamber notes more and more competitors using was found in the January 1946 issue of (in this case, the crankcase) during the this design. In response to many queries, Model Craftsman, with the manufacturer greater part of each revolution. The de­ plans to the model should be obtained listed as the Bone Tool and Gauge Co., signers of the engine claimed this gave from Chet Lanzo. 9910 Freeland, Detroit 27, Michigan. We could list the results but we don't The Howler we are featuring this month have the model-power combination, so is the MK II or 1947 model. As usual, all Continued on page 36

34 MODEL BUILDER SKY SCRAPER OLD TIMER Model of the Month Designed by: Carl Schmaedig Drawn by: Al Novotnik Text by: Bill Northrop In the late 1920's and early 1930's there were only two kinds of model aircraft... those that were intended to fly, and those that were not. The flying types were sim­ ply divided into indoor and outdoor, and glider or rubber power...no gas engines, no radio control, no pylon racers, no con­ trol line, etc., etc. And the king of outdoor rubber power competition was a strange... almost awkward looking thing call a "twin pusher." With its long, twin rubber motors, light airframe, and almost stall-proof canard configuration, the twin pusher, although not a great soaring bird, could stay aloft for long flights just on the dura­ tion of its motor run alone. A fine example of this type model is our Old Timer of the Month, Carl Schmaedig's "Sky Scraper," as published in the July 1936 issue of Model Aircraft Builder, and also in Frank Zaic's 1935-1936 M odel Aer­ onautics Yearbook. Carl, incidentally, was the designer of the "Miss Model Crafts­ man," which Frank acknowledges as be­ ing the inspiration for his famed "Miss America," originally kitted by Scientific, and now being kitted by several manu­ facturers as a popular old timer (see Bee­ hive ad in this issue). A model builder needs no special in­ structions to build this twin pusher. Note the wire "cans" which support the rubber in three places along each main motor stick. I wonder where the term "can" came from in naming these hangers? The wing is mounted flat about midway on the eight-inch long, 1/8 square "ele­ vation blocks," and the elevator is attached five inches from the nose. Test gliding without rubber and props was suggested. Move the elevator back if it stalls, move the wing forward if it dives (so it said). No mention was made of a balance point. Props (one left, one right handed) are mounted so that the top blade turns out­ ward under power. See how it was 50 to 60 years ago... try a twin pusher. You may like it, and think of the exercise you'll get chasing after it! · MARCH 1985 FULL SIZE PLANS AVAILABLE - SEE PAGE 106 35 The 14.33 cc FELGIEBEL ENGINE from NAZI GERMANY

Hitler used this engine in Nazi Germany to Felgiebel 14.3cc engine stands tall over Stu’s create air-mindedness in school-age children ever-present nickel, the last one he owns, we who would soon become Luftwaffe pilots. 2 understand!

VITAL STATISTICS r 1941 issue MAN carried a brilliant edi­ Dimensions: 6-1/8" long, 2-3/8" wide, torial by Charles Hampson Grant in which 5-7/16" high to the top of the head fins; a he said, "The German government was far moderate 19 ounces heavy. more absorbed in its airminded youth UNIQUE FEATURE than in its labor battalions, and educated Manufactured to EXPLOIT MODEL AVI­ the former in such numbers that they be­ ATION IN NAZI GERMANY! came the world's foremost airpower." And so, with strategic wartime material, • Franklin Delano Roosevelt and Adolph Nazi Germany turned out significant num­ Hitler both came to political power within bers of two-cycle ignition engines such as three weeks of each other...during the the W. Kratzsch company's KRATMO F depths of the Great Depression in 1932. 30B in 1934, the Kratmo F-10-B in Roosevelt and Hitler both died within 1936-37-38, and then followed the Eisfelds, three weeks of each other in April 1945. the Ortus, Argus, lkarus-10, Thaler, Blank- Both leaders were crippled throughout enmeister and others, including this their adult lives. Roosevelt, weakened by month's topic engine...The FELGIEBEL polio at 21, lived in a wheelchair. Hitler 14.3cc engine produced from 1939 was mentally weakened by virtue of being through late 1941 when most non-essen­ a manic-depressive. Hitler suffered bouts tial manufacturing ceased. of depression alternating with periods of Pictured is a reproduction engine super-physical aggressive drive, stamina made behind the Iron Curtain in and determination. The similarity of these 1983.. .the original engines are scarce to­ two world figures stops here. It was during day, as the allies did such an effective job a series of manic stages that Hitler in destroying Nazi Germany from the air. planned his Third Reich, came to power, Additionally, it was in violation of im­ and ultimately directed his World War-ll posed civil law ...for five years after WW- generals over their collectively sounder Engine had nearly square 26mm bore/27mm 11.. .for Germans to own, buy or sell, or stroke, turned a 17 x 6 prop at up to 6,000 judgement. RPM's. Intake tube, cylinder bypass cover, partake in items or activities related to So what does this history have to do and mounting flange all brazed together. model aviation. Under these conditions, with model airplane engines? Simple. Part it's little wonder that so few pre-WW-ll of Hitler's overall planning was to conquer white shirts and funny looking emblems German engines exist! through the overpowering aerial assault of on their sleeves. I NEVER REMEMBER, I've found an ORIGINAL late 1940 the Luftwaffe, his air force. In order to be NOR CAN I FIND TODAY pictures of that model Felgiebel 14.3 engine for sale in sure of enough air-minded youth to fill the type where gasoline-engined models were Vrane, Czechoslovakia, which I believe ranks...Hitler promoted heavily...or EX­ pictured. was the model for the repro pictured in PLOITED MODEL AVIATION ON A But during these years, industry was this article...the repro is one of five GRAND SCALE to directly cause air­ AUTHORIZED by the Reichsfuhrer to pieces hand-made by Ladislav Davidovich mindedness in young boys. I remember pump out gasoline miniature engines for ...the repro is valued at $150, which is far frequently seeing in Model Airplane News model aircraft use. The july 1938 issue of below the asking price for the 1940 and Flying Aces pictures of young model­ MAN carried a feature article on the grow­ original. ers with all-white large gliders posing in ing new German Air Force; the December A smaller 7.6cc Felgiebel was also

Plug Sparks . . Continued from page 34 induction of the piston) but the fuel orifice air was required, hence the hole in the opens only on the down stroke when bottom of the crankcase casting. greater uniformity of power impulses. As turned backwards. Tricky system!! No With a fuel system such as the one noted before, the quantity of the fuel was additional fuel can enter the crankcase as patented by the Bone Tool Co., the engine regulated by a standard type needle valve. long as the motor is flipped backwards. could be mounted in any position without Use of this system allows the modeler to As noted previously, the only air supply fear of flooding and/or hydraulic lock. quickly clear a flooded engine. As the sys­ to the engine in the MK I model was from For those interested in data and features tem works, the normal amount of air is the piston passing above the exhaust of the Howler, the engine has a bore of taken into the crankcase (through the sub­ ports. Later, it was found some additional .9375 in. and a stroke of .875 in. giving a 36 MODEL BUILDER Large open timer frame made point cleaning/ adjusting simple. Strategic metal materials had high priority in Nazi aero-education.

produced, and these two were the last of Felgiebel was an easy engine for young hands to disassemble and reassemble. Hitler recognized the Nazi engine lineage. wartime value in teaching mechanics and aeromodelling in school system before WW-II began. A translation by T. Kyslinda roughly says from Nazi records, "In the year 1939, the complication...a fine learning process for Today, one of these five repros is in a firm of A. Felgiebela was registered/auth- the Hitler Patriotic Youth Program. Houston, Texas collection, and another is orized to manufacture gasoline engines I had one of these "Repro" engines at in Aomori-Ken, Japan, with a collector. I'm for model aircraft use in the furtherance of the Toledo MECA Collectogether along awaiting arrival of the third one, that will one's own patriotic nation." The engines with several others. But the Felgiebel become a permanent piece in my own were made available to school children 14.3cc attracted more attention than my collection. Today's value of the five repros who were banded into school-sponsored other engines combined. By our standards is $150 each. The engine rates a "6" on model airplane clubs...they were not for it is huge...nearly a .90 cubic inch en­ appearance (typical for its day), is NOT sale in volume, but were mostly issued to gine. It has over an inch bore and over an rated on manufacture as it is a reproduc­ schools to make the students more air- inch stroke and was designed to turn a 17 tion, and is not rated on performance for minded as they grew up...to foster and x 8 prop at 6,000 rpm's. the same reason. · nurture an interest in powered flight among boys from 8 to 18 years old...so that the burning interest might prepare them for manned power flight not many Bosch ■Zvndktnt mil 10mm Geminde years later in Herman Coehring's Luft­ (wQhintiie auch waffe, the Nazi air arm. Hitler's Patriotic mil 6 mm 6e min del Youth Program was ultra-successful. The exploitation of model aviation with such determination will hopefully NEVER AGAIN occur. The design and manufacture of the Fel- giebel 14.3cc engine was very simple and conventional. The cylinder body was gleaming black and the bypass chamber was gas-welded to the left outer cylinder wall. The rear of the piston was slightly "slippered" to clear the crankcase cover ...two piston rings (not pinned) gave lots of engine life. The crankshaft ran in a sim­ ple bronze bearing...the bottom of the connecting rod was bushed and the rod was huge. The cutout on the piston's left wall was part of the timed intake porting of strictly conventional design. As you can see, the ignition timer was a huge "open" affair driven by a simple cam against a strong spring. Mechanical Drawing of This was an engine that any schoolchild the 7.6 cc and 14.3cc with a bit of mechanical aptitude could Oeieichnel 1st tier Motor AusK/hrungstelspiel I · 7,6cm1 Felgiebel Engine easily tear down and reassemble without ()MaSe gellenrur · · I-K b cm1 displacement of .604 cu. in. (9.9cc). high compression turbulent type com­ "hogged out" of alloy steel, hardened and Weight at 14 oz. was comparable to a pression chamber. precision ground. The steel timing cam Hornet 60 or McCoy 60. Other machined parts consisted of an was keyed to the crankshaft. Like the Hor­ The cylinder was cast from aluminum aluminum alloy piston with two pinned net and other powerful sixty size engines, alloy as a unit of bearing housing and rings, the tubular wrist pin with aluminum the timer was an automotive type with ad­ crankcase. The heavily ported cylinder pads, and a dural connecting rod with justable points. liner was machined from iron alloy, while ends bushed and a slot cut milled for As stated previously in past articles, the the cylinder head was made from alumi­ lubrication rather than an oil hole. num alloy. Claims were made for a special A 5/16-24 threaded crankshaft was C ontinued on page 72 MARCH 1985 37 tmm 278-5003

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ELECTRIC SWITCHES AND SPEED energize). Enclosed is a copy of the Recommended reading for those who have CONTROLS circuit. more than a passing interest in electronics. "I also modified the lomar SC-/ Speed Just to prove that we use letters as they ble, use a readily available timer so that Controller (Model Aviation) to shut the come, without any editing, here is one the unit can be duplicated by anyone motor down if input pulses are lost. En­ from John Schulein, San Jose, California: wanting to do so. For this and similar pur­ closed is a copy of this addition also. The "I am into electric flight and enjoy elec­ poses I can recommend some program­ switch modification requires no addi­ tronics as a profession and a hobby. I al­ mable clock modules available from tional IC's, but the speed controller ways read your piece in Model Builder Digi-Key Corporation, PO Box 677, Thief modification does require one new 1C and right after Mitch Poling! I personally River Falls, MN 56701. These modules are would like to have your column more some discretes." completely one-board, self-contained LED Right after Mitch who? I'll bet some of technical but realize that you have to clocks, requiring only the connection of a you thought that was going to upset me, write for a general audience. Keep up the transformer and some control switches. good work. didn't you? Well no, not really. You see, Such clocks can be made to stop without "I am interested in possibly building a some time back I received a request for losing the display by actuating the "set" Ni-Cd battery cycler using one logic, a one of my electronics indexes, with a control, and thus could be used as John comparator and a cheap digital watch check made out to...yep, you guessed states. The modules aren't expensive; the with start/stop timer mode. I would like to it...M itch Poling. Now THAT upset me! MA1023, with ,7-inch high digits, is only obtain the schematic for the Super Cycle Seriously, Mitch does a good job of keep­ $12.95 less transformer and switches. The battery tester that you mentioned in the ing those who like to trade watts for thrust catalog, which lists probably everything June issue for background information. current(l) with the latest equipment and else that the project will require is free, Enclosed is a self addressed stamped techniques. We seem to cross subjects and you can't beat that! When you order, envelope. now and then, which is to be expected tell 'em where you read about it. "In the December 1984 issue o f MB you due to the similarity, but as long as John mentioned some fail safe articles pub­ and the rest of you read both of us, the se­ Continued on page 88 lished in British magazines. I have some quence is not that important. interest in this subject also and would like Anyway, Mr. Schulein now has his sche­ To slicing signal (Bl-5). Take to gnd copies of what you have on this. On the matics, along with some other information fail safe subject, I have modified the Fritz I happened to have on battery cyclers. All Mueller electronic switch (jan. '83) so that we ask is that you share the results of your if the input signal hangs high or low (in­ experimenting with us. I have one more put pulses lost), the relay w ill open (de­ suggestion in this respect...if at all possi-

38 MODEL BUILDER PRODUCTS IN USE VOLTMASTER By ELOY MAREZ

• It is indeed doubtful if the radio from similar battery packs; four cells for control hobby as it exists today would be the receiver, and eight cells for the possible without the nickel cadmium re­ transmitter. This means that we are chargeable battery, or something of a interested only in monitoring certain different chemical makeup yet possess­ voltage ranges; around 4.8 for the ing the same electrical characteristics. receiver and 9.6 for the transmitter. An The importance of a healthy Ni-Cd expanded scale voltmeter (ESV) is just The Ace R/C Voltmaster, precision four-range battery has long been understood by the what the doctor ordered. Expanded Scale Voltmeter, shown with 500 R/C community, even though the bat­ What is an expanded scale voltmeter, Ma 'square pack' for size comparison. tery itself has not always been so. you ask? It is an instrument in which Fortunately for the average R/C’er, he electronic circuitry is used to magnify a does not have to understand all of the portion of the scale of an analog (pointer mysteries of Ni-Cd batteries to keep an type) meter. It overcomes the problem R/C system going, any more than he has of reading small changes in values on an to understand those of propeller design average sized scale. For example, as­ or the boundary layer just to get an air­ suming a voltmeter with a two-inch plane in the air. scale, adjusted to read ten volts maxi­ However, there is one very basic mum, a change of .1 volt ... a useful parameter of a Ni-Cd battery that can be value in Ni-Cd measurements .. . would easily monitored and measured, which move the pointer only .02 of an inch, a will tell you without any doubt about its nearly invisible excursion. Picture now condition and that of its individual cells. the same two-inch meter adjusted to That is its voltage,theelectronicpressure read only one volt at full scale. The same upon which everything else is depen­ .1 volt variation would now move the dent. A battery must be able to maintain needle .2 of an inch . . . a variation much its rated voltage throughout its useful easier to recognize and interpret. life to have its rated capacity; loss of This is similar to what we do to expand voltage leads to loss of capacity. the readings of a voltmeter, only that, Monitoring of the voltage of a Ni-Cd instead of having a capability that starts battery, if it is to be done at all, requires at zero, we adjust it to start just below not only an accurate instrument, but the lowest value we are interested in, one whose indications can be easily read and to end just above the highest. In a and understood. This requirement is variation of the 0 -1 volt example above, further fortified by the fact that Ni-Cd say we are most interested in reading 2.5 cells have an extremely flat voltage volts, plus or minus .25 volts. We would curve; very little change occurs during then design our ESV to read only from most of the useful life of the discharge 2.0 to 3.0 volts, which would give us a cycle, only to plummet rather rapidly at reading of mid-scale at our critical 2.5 the end voltage, about 1.1 volt. value, with the same .2 inch movement The situation does get simpler, as the Inside of the Voltmaster . . neither complex majority of our R/C systems operate Continued on page 93 nor crowded. Calibration important, but easy, requires charged battery and accurate V-meter.

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Voltage curve of the average Ni-Cd battery. Notice A ll electronic components are mounted on this small printed circuit board. Kit that the voltage stays fairly even for most of its assembly is simple and fast Complete instructions are furnished. useful discharge cycle, then drops very rapidly.

MARCH 1985 39 .. »■· *. ’■* The Sea Gull and Victoria Poling at the lake. Sea Gull flies well on Jack Pignolo's Astro Flight Super Monterey on old tim er floats. A Astro 075 and Astro 15 at 3-1/4 to 4 lbs. flying weight. strange combination, but one that works well.

By MITCH POLING The Astro Flight 15 Aircraft motor. Has 11 turns, formerly 10. Works best with a 7 x 4 prop. to the release at the tail of the plane, and I wrote about John Evan's electric photo tries. Twice the sailplane began doing bar­ he makes the takeoff a little longer, but plane in the January column, it is a very rel rolls around the towplane. Once the not much. G.l. Joe flaps in the breeze practical plane as well as being a tech­ sailplane climbed so much higher than back there while in flight, and the plane nical achievement. Well, John has fun the tow plane that the elevator could not has to fly quite slowly, with about half the with electrics too, it isn't all business! His compensate, and once the towplane climb, but still it is up to parachute release parachute dropping and glider towing zoom climbed and caused the sailplane height in about a minute. There was plane shows the same ingenuity and to pull the tow plane into a spin. The enough of a breeze to make G.l. Joe drift impressive flight that the photo plane plane has towed a 25 ounce sailplane and the length of the field. The kids went nuts, does. Here's John's description of the would probably tow one up to 35 "More, more!" John obliged with a quick plane. ounces." landing, and two more takeoffs and "The olive drab high winger is a scratch While at the Nats in Reno, I went flying parachute drops. design fuselage with modified Oly II tail with John, and he demonstrated the If you have a little kid, this plane is surfaces and a modified M.E.N. Cub wing plane. It is quite attractive . .. has a sort of ideal, they love the action! I have seen of 72 inches. It w ill tow sailplanes to alti­ "big puppy" appeal to it. John's little boy another parachute plane in action that tude and release them or take up a C.l. and some neighbor kids were obviously dropped G.l. Joe from a hatch in the loe and parachute. The plane weighed 54 entranced with it, especially after they cabin. This has less drag, but not as much ounces and flew beautifully with a Leisure found out it could take a G.l. Joe up! The appeal, seeing the doll flap in the breeze 05 geared 2.5-to-l using seven Sanyo sub- park was pretty small, smaller than I is half the excitement! C's and an o ld Kraft brick. By the way, it usually fly from, but it does just as John This plane flies beautifully, climbs like a uses the electric race car throttle, as do all says, a short takeoff "amble," and up and bandit, and is very efficient. Besides that, my planes. A micro servo and the rheostat away. it is a lot of fun. It would be a beauty on do not weigh any more than an electric The G.l. Joe is attached by his parachute floats. throttle and are less expensive than any of the electronic throttles I have heard about. 'The tow plane is now powered by an Astro cobalt 15 and twelve 1.2 Ah Ni-Cds. With an Airtronics XL 6-channel with mini servos it weighs 72 ounces. The perfor­ mance is incredible. It w ill jump off the grass w ith the 3-1/2 inch Trexler wheels in about 12 feet and climb until it is too small for comfort in about 1-1/2 minutes. It flies best w ith an 11/7 Top Flight wood prop (lohn is using a gear drive, did not mention what ratio-MP), but for towing I use a Top Flight 12/5. A release is built into the tail of the plane and a release is desirable but not necessary in the sail­ plane. With the two releases either flyer can abort the tow instantly should Glider towing and parachute dropping plane, by John Evans of Reno, Nevada. Uses modified problems arise, as they did on the first five M.E.N. Cub wing, modified Oly II tail surfaces, original fuselage.

40 MODEL BUILDER I saw some photos of it towing the sail­ plane. In Europe they have moved the tow point to the balance point of the wing, often with a tow pylon on top of the wing. That makes the tow plane a lot less sensi­ tive to the movements of the sailplane. For those who would like to try the elec­ tric car throttles on electric planes, I do recommend that you install it in a clear area in the plane, away from anything that heat can bother, such as electronics and insulation. John has very clean installa­ tions in his planes and there is free space around the throttle, which is usually just forward of the wing leading edge. Thanks for the report, John! I'd like to have a plane like that myself! Last month I reported some bench tests on the new Astro cobalt 15 aircraft motor. Since then I have had a chance to do some flight testing. I used it in my new seaplane, the Sea Gull, which I designed Leisure Playboy on old timer floats, also by Jack Pignolo. Water flying site is near his home to be general purpose. It will fly with any­ in Massachusetts. thing from an 05 to a 25. My initial im­ pressions from the bench tests were setup, that is, it should be ideal for pylon charge, but specify this clearly if that is confirmed in flight; the motor is a high racing, F3E contests, and free flight. If you what you want. speed motor and likes to rev up. When I wish to fly it in a sport plane and get Speaking of seaplanes, marine motors, used a 12-cell 1.2 Ah Sanyo pack, the best longer flight times, use a narrow blade 7x4 and such, Jack Pignolo sent some photos flights were with a Rev-Up 7x4 prop, or a 7x3. If you wish to have even longer of his electric seaplanes. He lives on the which has a narrow blade and draws less flight times, a gear box will make a big shore of a small lake in eastern Massachu­ current than most 7x4 props. My flight difference. setts, so floats are a natural way to go all times were about five to six minutes with John Evans used a gearbox on the older year long. Jack says he has been a model­ this combination, with very quick takeoffs model cobalt 15, which is an even hotter er for 40 years and has been flying elec­ from water and a lively climb. The plane motor (10 turns, as compared to 11 now), trics for the past three years, the latter of flies fast with this motor, about 20% faster and has excellent duration, well over six which has been the most fun yet, he just than with other motors. minutes. However, my favorite motor, and loves it! He hand launches his seaplanes All up weight of the Sea Gull is four the one I recommend to sport fliers who to keep out water spray. He found that pounds. It has a span of 60 inches and an like to fly easy going planes that make water will melt brushes like wet chalk rub­ area of about 500 square inches. I could long flights, is the marine motor, with 13 bing across a blackboard. At $8 a set for get flights of a little over six minutes if I turns. It will easily turn an 8x4 prop for silver graphite brushes, he says he can live went to a 7x3-1/2 Cox gray prop, but the over six-minute flights, and comes with a without ROW! He lands dead stick, then climb was sluggish, though the takeoff 1.2 Ah battery pack. So take your pick ac­ turns on and motors to shore. was prompt. cording to your preference! The motors Saturday and Sunday mornings are his The aircraft system comes with 800 mah alone are stock number 6615 for the air­ favorite times to fly. It's mostly calm, quiet, cells, so I flew with twelve of them to see craft motor, 6815 for the marine motor, and his fellow lake dwellers NEVER com­ what that was like. The plane weighed both at $90. If you order a marine motor, plain. The Super Monterey looks pre­ 3-1/4 lbs. with this pack. I used a 7x3 Top order a prop driver too, as it does not historic on floats, but flies great! The land- Flight wood prop, which gave a good come with one. The systems are 6515 (air­ takeoff and medium climb. Surprisingly craft, with twelve· 800 mah cells), and Continuecl on page 70 enough, with this prop I got five to six- 6715 (marine, with twelve 1.2 Ah cells), for minute flights too. The current drain with $170. Again, the marine system does not this prop is only 8 amperes. come with a prop driver, so order one. My conclusions? The aircraft motor is You can order either motor with either the definitely a max power in minimum time 800 or the 1.2 Ah pack for no extra

John Evans and his glider tug/parachute drop­ Interior of glider tug. Batteries placed well Mitch's new book on building and flying elec- ping hybrid. Colors are olive drab and cream. forward. Astro 15 cobalt motor. trie powered model aircraft now available.

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42 FULL SIZE PLANS AVAILABLE - SEE PAGE 106 MODEL BUILDER PLAYBOY SR. FOR HALF-A TEXACO

By JIM REYNOLDS . . . If you want to compete in the Old Timer Half-A Texaco R/C event and have a chance of winning, this is your model to build!

• Why build a Playboy, you ask? Because Model has a wing area of 315 sq. in., spans 50-1/4 inches and weighs 17-1/2 ounces. Use a dark it can WIN! The 1983 SAM Champs radio color on the bottom of wing and stabilizer for best in-flight visibility. Prather nose weight. assist results list seven events, first through fifth place, that a Playboy could enter. boy wing twice! The first wing was built Vanguard receiver, a Futaba 250MAH bat­ Fourteen out of the 35 places listed went using the same type structure as shown on tery pack and two World Engines S-22 ser­ to Playboys. That is forty percent. There the 1941 Cleveland Model and Supply Co. vos. The switch, battery, and receiver all were no 1/2A Texaco Playboy winners, but Playboy Sr. plans. It did not last long. After go behind the firewall. The servos are just there should have been. This 1/2A version two uneventful test hops, test flight num­ behind the CG. Access to the radio equip­ of the Playboy Sr. is aimed at solving that ber three was a disaster. The little bird ment is through a 1/8-inch sheet hatch on problem. caught a boomer, the engine seemed to the bottom of the fuselage. The full size Playboy Sr. has a wing span run forever, and then floop...it disap­ The servo rails were made from 3/32- of 80 inches and a wing area of 800 peared into the clouds. A little rudder, no inch plywood and were fitted between square inches. For no scientific reason a airplane; much more rudder, and finally it the side stringers. After the crash, I added wing area of 315 square inches was select­ popped out of the clouds in about a 60 some 1/8-inch sheet to the 1/16-inch sheet ed for the 1/2A Texaco version. The wing degree dive. The left wing had folded. Af­ fuselage sides where the servo rails join to span came out to 50.25 inches. According ter a long uncontrollable dive, the Playboy help spread out the load. Just some insur­ to SAM rules (eight ounces of weight per impacted in the middle of a paved runway. ance in case I had to make another "test" square foot of wing area) the model has to Miraculously, damage to the fuselage was crash. One-eighth inch square hard balsa weigh 17.5 ounces. minimal, but the wing was a basket case. push rods were used to connect up the I have a love-hate relationship with The second wing, the one shown on the controls. Plastic rods could be used, but wings. I hate cutting out wing ribs, notch­ plans, was built with upper and lower be prepared for some unwanted trim ing trailing edges, sanding, covering and wing spars and has 1/16 inch vertical web­ changes as the temperature varies. putting on identification numbers. I love it bing in between. It is strong. The control surfaces were hinged with when the job is done. Most Playboys, big or small, come out Rocket City nylon strip hinge material. Unfortunately, I had to build the Play- tail heavy. This one is no exception. For­ This hinge will Hot Stuff in place. The tunately, this one also came out under­ controls were set up so that rudder throw weight. A one ounce Prather nose weight was 3/4 of an inch each side of center. The put the CG at the required 50 percent elevator travel was plus or minus 1/4 inch. point and helped meet the minimum The elevator is more of a trim tab than an weight requirement. The weight looks like elevator, but it works. GM weight Silkspan a small flywheel and was added behind was used to cover the model; however, the prop. The hole in the weight had to be plastic covering w ill work just as well. bushed to fit the smaller Black Widow If you elect to cover with paper and prop shaft. dope, add a plasticizer to your dope mix­ The engine was mounted with 2-56 ture. It helps prevent banana shaped screws and blind nuts. If you can drill four stabilizers and other weird unwanted geo­ holes in absolute alignment, then use metric shapes. A mixture of 1/4 ounce Tri 3-48 screws and blind nuts, as they are a Cresyl Phosphate (TCP) with eight ounces perfect fit for the engine mounting lugs. The radio equipment used was a Royal Continued on page 107

Cox Black Widow has five head gaskets and a Golden Bee tank. With 8x4 prop and 5% nitro Access to radio compartment is through 1/8-inch sheet balsa hatch on bottom of fuselage. fuel, it'll run nearly seven minutes. Servos are World Engines S-22*s. Push rods are 1/8-inch square hard balsa.

MARCH 1985 43 Γ

the Staten Island Ferry By WALT MUSCIANO . . . First of a three-part series on the world's most famous ferryboat line. Plans for a model of the "Miss New York" will be next, followed by a model ferryboat terminal! Stay tuned.

• Ferryboats are the most fascinating of all and trucks. On an average working day, minute, moving only one and a half to ships; ocean going or harbor craft, the five operating ferryboats transport over two ship lengths during the stopping oper­ whether naval or commercial. The most 75,000 people and 3,500 cars and trucks ation. Most similar size ships take up to famous ferryboats are those which speed on the five mile run across New York Bay. four minutes and often move about four across New York Bay, day and night, be­ New York City's Staten Island Ferryboats ship lengths during the stopping oper­ tween the island of Manhattan and Staten have special features not combined in ation; (4) EXCEPTIONAL STABILITY is Island, weaving between the endless most other types of ships: (1) HIGH SPEED mandatory because the entire payload of stream of tankers, container ships, ocean is necessary so that each boat can make people and vehicles is above the main liners, and naval vessels which cross the as many crossings as possible in order to deck. Much of this load is mobile, be­ ferry's path on their way into and out of transport the large number of pedestrians cause the more than three thousand peo­ the world's busiest harbor. The large num­ and vehicles. The boats have a speed- ple carried by each ferryboat walk around ber of harbor tugboats, scows, and pleas­ length ratio of 0.90, which is equal to or the boat during the trips, usually from ure craft add to the traffic encountered by better than many ocean liners, and can at­ side-to-side as the boat passes the many the Staten Island Ferries. These famous tain speeds of over 18 miles per hour, points of interest; (5) EXTRA HULL COM- boats have been subject of attention by which is faster than many ocean-going PARTMENTATION is necessary because tourists, native New Yorker sightseers or cargo ships. Moreover, the double-ended the hull has no reserve buoyancy due to lovers on a moonlight sail, artists, writers ferryboats are equally fast when travelling the low freeboard, which is the distance and poets, as well as by movie-makers, ahead or astern; (2) MANEUVERABILITY between the waterline and main deck. however, their principal function is to pro­ is essential, because the Staten Island Fer­ So we see that what appears to be an vide a mass transit link between Staten Is­ ry route crosses the very busy shipping ungainly ship is in reality a swift and land and Manhattan for pedestrians, cars channel where all the other traffic has the maneuverable vessel with exceptional right-of-way. This is like driving a car back control and stability; a most unusual com­ and forth across the busiest city intersec­ bination for a ship which can carry over tion on a rigid schedule without the help three thousand people and an average of of traffic lights; (3) EMERGENCY STOP forty cars and trucks. must be quick because of the heavy ship­ For a typical twenty-minute voyage on ping traffic. These ferryboats can come to the Staten Island Ferry, we must first enter a full stop from full speed in less than a the ferry terminal building. After paying

The John F. Kennedy class joined the fleet in 1965. shown here on a trial run, the wake in­ The 1951 Verrazzano with the Statue of Liberty in the background. Present color scheme, as dicating the 18-20 knot speed capability. shown in the photo, is orange/yellow superstructure, with black scrpt lettering.

44 MODEL BUILDER the twenty-five cent fare, we can board the ferryboat from either of two levels in the building. Only the center portion of the lower deck of the ferryboat, which is called the Main Deck, can accommodate vehicles. These board the boat simul­ taneously with the pedestrians. We can sit inside in the comfort of the cabin and even enjoy a snack, or, as many pas­ sengers prefer, we can stand at the rail on the open deck to enjoy the sea breezes and admire the many interesting sights to be seen during the voyage. Some of these are the breathtaking lower Manhattan sky­ line, Battery Park and Castle Clinton, the Statue of Liberty, Brooklyn Bridge, Battery Maritime Building, Governor's Island and Castle William, Robbins Reef Lighthouse, and many other historic landmarks, plus of course, the many ships from all over the world entering and leaving the harbor. The speed is thrilling as the ferryboat cuts across the bay. At the end of the trip the ferryboat heads for the slip at con­ siderable speed, which makes the uniniti­ ated passenger wonder if this large craft w ill ever stop in time. When the boat reaches a ship length or two before the slip, the propellers stop turning but the ferryboat continues forward at good speed; then, when the bow is about half­ way into the slip, it is full speed astern! Amidst the churning foam created by the braking propellers, the bow gently nestles into the matching curve at the terminal and, before we can recover from the thrill of the amazingly professional docking, the passengers and vehicles are already dis­ embarking. Many passengers take the very next ferryboat back to relive this mem­ orable voyage. In order to accommodate the vehicles and passengers within a ship of limited length, the decks must be broad and blunt, however, the necessity for high speed dictates a slender hull. These con­ tradictory requirements result in a ship with a superstructure much bulkier and broader than the underwater hull. The double-ended design speeds loading and unloading at the terminals and shortens the travel time because the ferryboat doesn't waste time turning around, which would be very difficult in New York Har­ STATEN ISLAND bor anyway. One of the Staten Island Ferry's most im­ FERRYBOAT ROUTE portant accomplishments is its depend­ ability. Under the most violent weather conditions, which force even the sturdy tugboats to tie up at their docks, these sea­ worthy ferryboats continue operating, usually right on schedule! New York City has from time to time been hit with crip­ pling blizzards and powerful hurricanes, yet the Staten Island Ferryboats continued to operate throughout nature's fury. Al­ though there was some damage to equip­ ment during adverse weather, no loss of life or injury ever resulted from ferry oper­ ations. It is remarkable that since 1937, when the technically advanced ferryboats Miss New York, Mary Murray, and Gold Star Mother entered service, New York Ci-

Artist's conception of the Andrew J. Barberi class ferryboat which entered service in 1981 and Continued on page 100 1982. Vessel was designed by George G. Sharp, Inc., where author was a member of design staff.

MARCH 1985 45 Start of a three-minute enduro at the Electric Boat Race in Tacoma, WA. Clean silent electric Close racing action, as two "Sport Vees" boats should open up many racing sites not otherwise available. round a corner buoy. R/C POWER By JERRY DUNLAP _ _ BOATS

LET'S GO ELECTRIC BOAT RACING boaters begin taking an interest in electric anyone interested in driving the boat. Having been involved in model boating racing, I'm sure there will be a need to Those interested usually turned out to be for twenty years, I've spent considerable modify and update the rules. But I did kids whose dads were frantically attempt­ time organizing and officiating model mention that these rules are "Proba­ ing to get a gas boat ready for the next boating events. During this period, I've tionary." heat of competition. The basic rules that managed to come into contact with just The lack of promotion of electric model we would be using were distributed to about every aspect of model boating com­ boat racing is the second reason this anyone appearing vaguely interested and petition. In some instances, the contact aspect of our hobby has not experienced sometimes to anyone who just happened resulted in a bruised boat or two. Sailboats much activity. If electric model boat rac­ to be in the vicinity. Out of politeness, to hydroplanes, deep vees to tunnels, I've ing is to gain the same popularity as inter­ many club members listened to my spiel. raced them and organized races for them. nal combustion racing classes, it will need I cleared my workshop of spare hulls and With my emphasis of late being directed a number of individuals willing to assume parts that could be used in an electric race towards electric model boating, it was a a leadership role in the organization and boat. I really thought I'd done a good job logical progression to organize a race for promotion of events for this form of model of promoting the race among my local this category of model boat. It will prob­ boating. Although some of this leadership club members. ably come as no surprise to most of you may come from those already involved in And then race day arrived. One other when I state that very little has been done existing model boating competition, it is club member besides myself showed up to in the way of organizing model electric my belief that the amount of crossover participate. A couple of others did make boat racing. Electric powered model boats from internal combustion to electric rac­ an appearance to watch and help. But the have been around for years. In fact, most ing w ill be limited. After going forty or amount of participation from those al­ of the earliest radio controlled model fifty M.P.H. with a gas boat, a twenty mile- ready involved in the hobby was not as boats were electric boats. However, the an-hour electric boat may not have much great as I expected. It could have been majority of electric boats tend to be more appeal to a dedicated throttle jockey. that two months was just not sufficient in the area of non-racing semi-scale or I base this observation on what hap­ time for people to become converts to an scale model boats. It seems to me there pened to me as I attempted to generate in­ alternative power source. There's some­ are two main reasons for this lack of ac­ terest in my local boat club for an electric thing about 'Teaching an oid model boat­ tivity in model electric boat racing. race. Two months prior to the electric er new tricks" that may have some amount The first reason is the lack of a set of for­ race, I began bringing my electric models of application in this instance. I learned malized racing rules reflecting current de­ out to the gas competition events. During that it is going to take more effort on my velopments in electric power for model breaks in the racing, and these are abun­ part to generate interest in this type of usage. The many improvements in batter­ dant in a gas race, I demonstrated the model boating. ies, motors, and charging systems brought electric boats. I'd pass the transmitter to I was very fortunate to have a local hob- about by electric car racing has created an abundance of items that can be adapted for model marine applications. The elec­ tric rules of both the International Model Power Boat Association and the North American Model Boat Association were adopted prior to the technological ad­ vancements achieved by electric car racers in recent years. In hopes of incorporating some of these recent developments, I wrote a set of "Probationary Electric Racing Rules" to be included in the N.A.M.B.A. Rulebook. Two months ago those rules appeared in this column. It remains to be seen how Two "Sport Vees" belonging to Scott Hogman (foreground) and Jim Welch duel side-by-side. well these rules will work. As more model Scott and Jim were 1st and 2nd respectively in Experienced Class.

46 MODEL BUILDER Gary Keyes' Sport Vee leads Paul Dunlap's Dunlap Vee through a Gary Keyes leads Jim Welch, who's Sport Vee is about to eat a mark- corner. Hmmmm . . What comer? Where's the bottle!? er. Maybe this shot was taken before the one at left! by dealer willing to assist in promoting electric boats is their appeal as a racing electric model boating. This particular class for youngsters. I suspect most young hobby dealer is very involved with off­ people enjoy watching model boats. I also road racing. Because he has an existing know that many of them enjoy running a stock of electric car items, the base was al­ model boat. Unfortunately, the reality of ready established to branch out into elec­ operating a gas powered model prevents tric boating. It turned out that there were most young people from experiencing the a few off-roaders who thought it might be fun of model boating. Electric model fun to attempt to set up an electric race boats can allow youngsters the oppor­ boat. When questions arose about what to tunity to experience all the thrills of com­ get, the hobby dealer was ready with his petition without many of the difficulties catalog to show what was available. As that seem to accompany a gas race. My these fellows already had motors, battery Wakes in all the above photos prove that elec­ eleven year old daughter, Denise, isn't at packs, radios, and chargers, they were trics provide plenty of fast action for racing. all interested in the gas boats. But she able to get ready with a minimum invest­ What really saved the day, however, was does enjoy running the electric models. ment. Because of their experience with the use of the large recreation facility lo­ She especially enjoys the racing when electric cars, they had the knowledge on cated adjacent to the pond. While the rain there are candy and Coke machines in the how to set up the motors and radios. cascaded from the clouds, we set about recreation room! I was fortunate in another way when it preparing for the event inside the warm, The actual racing provided some in­ came to offering a race for electric boats. dry confines of the recreation room. This teresting insights. To add a little excite­ Model Racing Products, a leading supplier is one of the nice things about electric ment to the Experienced Class, it was of boats and components for this activity, boat racing. You can test your equipment decided to have the boats circle the was interested in the event. Their willing­ indoors and not worry about offending Start/Finish marker. Well, that decision did ness to provide awards for the race was anyone because of noise or exhaust. create some excitement. With sometimes greatly appreciated. That the guys from The extremely wet conditions just out­ three and four boats attempting to circle M.R.P. would bring down a batch of boats side the sliding glass doors discouraged the marker at the same time there were to race at the event was also encouraging. much pre-race testing. The weather condi­ collisions and swamped boats as well as It's comforting to know that someone tions almost discouraged me from even the excitement. In future electric events, I plans to attend your party after you've put setting out the course markers. But as don't believe we'll attempt this circling in some time setting things up. Although more model boaters sloshed into the maneuver. A better idea would be to in­ the M.R.P.ers have done several promo­ recreation room, I knew we'd have to run clude a couple of left turns along with the tional events with their boats, this was the the event.. . rain or shine. We definitely right turns. This would lessen the chances first actual race for their equipment. They had the rain. of boats having to cross paths with each were interested in running their boats in other. Circling a buoy can create some an organized event. Originally, I had planned to offer both bad situations. heat racing and enduro racing for this Although it might seem obvious, the THE PUGET SOUND MODEL BOAT event. The weather conditions dictated a need for waterproof radio compartments CLUB MODEL RACING PRODUCTS change of plans. Three enduros of three or waterproofing of radio equipment was ELECTRIC BOAT RACE minutes duration would comprise the brought out during the racing. Just be­ It is a credit to the type of individuals in­ day's racing program. Winners would be cause these boats aren't going as fast as a volved in model boating that anyone even determined by most laps accumulated in gas powered boat doesn't mean they aren't bothered to show up on race day. Sched­ the three sets. The boats we were using for going to get things just as wet. It is not uling a model boat race in the Northwest this race were either deep-vees or semi- enough just to install you radio equipment in mid-November is risky business at best. vees. The maximum battery pack was in the boat and then fasten down a hatch Race day provided us with an opportunity seven cells and the motor was to have a that doesn't keep water away from the ra­ to watch huge amounts of rain gush from retail price of under $25. In the hands of dio system. Electric racing action is every the sky. The biggest winner on this day those who knew a little about electric bit as rough as a gas event. The boats were was the weatherman, who had forecast setups, this combination proved to be getting knocked around during the course heavy rains for most of the day. pretty quick. I was impressed with the per­ of racing action. By the end of the day's Although the weather was most definite­ formance of the M.R.P. "Sport Vee." The racing, one fourth of the boats were elimi­ ly bad news, there was some good news. guys from M.R.P. have been working on nated from the competition due to radio We didn't have to spend all day in the this boat for a couple of years. It quickly failures caused mostly by water getting to drippy conditions. The Lakes Landing became apparent to me that I still have the radio equipment. Apartments in Tacoma, Washington some things to learn about setting up a It is interesting to note that even though served as our hosts for this event. The competitive electric race boat. the driving tended to be very aggressive man-made pond located in the middle of The racing was divided into two cate­ this large apartment complex provided an gories: Novice Juniors and Experienced. ideal site for electric boat competition. One of the positive aspects about model Continued on page 72

MARCH 1985 47 "The truth about aeroplanes is that, as man's most highly-engineered creation, they are inherently troublesome."

•'T h e truth about aeroplanes is that, as them until it's too late." (Frank Zaic) man's most highly-engineered creation, ON NON-MODELERS Bill Brown, running the Brown Junior ignition they are inherently troublesome." "When it comes to airplanes, they don't engine No. 1, built while he was a student in This month's lead-in line, from the pen know a Peanut from an apple." (Ralph high school. Hand held, no less! Photo by of Roger Bacon, appeared in a 1958 Saldivar) Walt Mooney. FLIGHT magazine. Bacon is also of the ON FLYING MACHINES flight, according to Dick Allen. As part ot opinion that: 'The only thing you learn "You discover one-third of its problems Canada's EXPO 86, plans are to include a from history is that you learn nothing from by pure calculation, another third from DC-3 Air Rally in Vancouver, with 50 air­ history." wind-tunnel and laboratory tests, and the craft from world exposition countries be­ QUOTES GALORE! last third during the naked reality of the ing invited to participate. As Dick puts it: Our quotations continue to attract com­ flight tests." (Lucien Sevanty, quoted in 'The logistics of assembling fifty DC-3s ments from readers... along with more REVUE AEROSPATIALE, via Georges might be even more interesting than the quotations! Ordinarily we employ only a Chaulet) actual flypast. Are there even fifty flying couple of them per issue, so our backlog "An engineer's tendency is to improve a DC-3s in the world?" (I'll bet there are threatens to swamp us at times. Since design until it won't function." (Cooper over 200. Can anyone give a calculated most are too worthy to be ignored or dis­ Lindy, via Duke Silver and Ken Hamilton) guess? wen) carded, we now offer this year-end clear­ ON FLYING A FULL-SIZE AUTOGIRO NOSTALGIA TIME ance from near and far: "I call it a "Heinz Flying Machine"... a Jean Francis Frugoli, of France, well ON ACCURACY IN MODEL BUILDING pilot can get into 57 varieties of pickle remembers the visits of U.S. Navy aircraft "Measure with micrometer; mark with and still walk away from it!" (Johnny carriers to Marseille's harbor during the chalk; cut with axe." (Attributed to Mark Miller, the first person to deliberately loop 1950s: "Some of the seamen came to fly Smith, winner of Giant Scale R/C Glider at an Autogiro, circa 1931) control-line models at our club's field. It the 1984 Nationals, by James Lueken, win­ ON POLITICS was during the great years of the Barn­ ner of Hand Launched Glider at the Nats) 'The whole aim of practical politics is storm er stunter, Berkeley models, and Jim ON TECHNICAL BOOKS to keep the populace alarmed (and hence Walker's control handle. I was proudly us­ 'Too many textbooks are written by pro­ clamorous to be led to safety) by an end­ ing a Dooling .29 I had bought for a for­ fessors whose main objective is to impress less series of hobgoblins." (H.L. Mencken, tune in Switzerland. Even now this engine other professors with how profound they quoted in the AOPA PILOT) is fascinating. It was a good time...we are!" (Bob Whittier) Whittier adds: "My And finally, Augustine's Law No. XXX: were young." own impression is that aviation books at "The O ptim um com m ittee has no CALAMITY CORNER least are passports to frustration and be­ members." Dr. John Martin, proprietor of the Flori­ wilderment." GOONEY-BIRD GATHERING da Hangar Pilot newsletter, has a problem: ON OUT-OF-PRINT BOOKS June of 1986 marks the 50th anniversary "My 60-pound Labrador retriever "puppy" "Books are like vitamins. You don't miss of the classic DC-3 making its inaugural ate my mailing list of over 200 names! I

Bill Northrop's British designed "Delta I" on takeoff at Northrop Moments after photo at left Bill forgot about tremendous power Flying Wing contest. Built first one 30 years ago from same plans. difference between TD .049 and McCoy .049 used in first one! 48 MODEL BUILDER Florida's Dick MacEntee admires eight-inch span Alco Sport Pistach- Sandy and Bob Peck examine Lacey M-10 Peanut buit in Japan by io Nut flown during MIAMA Inter-Gnats. Photo via Doc Martin. Shoichi Uchida, flown in Belgium Internets, then mailed to Calif. have a partial list of 100, but it is not up-to- ested in this sort of thing, but at least we on small flying models seems an ever­ date." Any subscribers who have not will all get to know each other. What can present problem with only partially satis­ received a MIAMA newsletter recently you lose? A few evening's work. PIS­ factory answers. Bob Whittier, of Massa­ should forward their names and addresses TACHIOS FOREVER: SIC SEMPER PIS­ chusetts, reports that Spray-O-Matic brand to Doc at 2180 Tigertail, Miami, FL 33133. TACHIOS." spray-can clear lacquer works better than (Spray your correspondence to Doc with How can one resist enthusiasm such as clear dope on tissue-covered surfaces. He dog repellant! wen) that? Full details are available by sending says it causes no over-tightening, and pro­ PISTACHIO PROXY PROPOSITION a pre-addressed stamped envelope to Doc vides uniform, streak-free coverage. Doc also reminded us of his forth­ Martin at his previously noted Tigertail ad­ Dr. Bill Harris, of Hawaii, is trying a coming World Inter-Gnats for tiny flying dress. We think he may indeed, have a more novel idea. His interest is eliminat­ scale models, which has been resched­ tiger by the tail... ing the complex bulkhead-and-stringer ap­ uled for April 13th and 14th, 1985. Martin FUZZY FLYERS proach to building elaborately contoured describes Pistachio Nut models as follows: Efficient aircraft should be smooth, scale models, by employing monocoque They are like Peanuts but smaller. right? Well, maybe. Some of Mother Na­ stressed-skin components. The examples They are harder to build and trim. tures best insect flyers are downright hairy. he showed were formed from glue-impreg­ You have to use tweezers sometimes. Burr Stanton, of Kentucky, builds sliced- nated tissue formed over a 1/32nd scale Having thus made us thoroughly appre­ foam indoor 'Guppys" featuring airfoils plastic display model Seversky P-35. Dif­ hensive, he presents the brighter side of which are both fuzzy and full of minute ficulties encountered include resistance to Pistachios: They are cheap to build, cheap holes. Yet, they perform magnificently, removing the parts from the forms, and ex­ to mail, small enough to flight trim in well enough in fact, that he has flown as cess shrinking. But advantages include your own home, expend less building many as seven simultaneously, no easy retention of fine molded-in details, and time and (most importantly) are lots of trick to perform. being able to use the kit decals for mark­ FUN!! And Dick Baxter has tried felt-flocking ings, not to mention the great weight sav­ He assures prospective entrants that in Wakefield model wings. His experiments ings. As Harris puts it: "It almost works... I addition to trophies, all entrants w ill were carefully conducted, including tests think I'll just wait for someone else's re­ receive complete results of the meet, even in which the model was flown with one search and development. I've amassed a if they place last. He is sending announce­ wing panel flocked and the other smooth. horde of plastic kits on the supposition ments to many different countries in an ef­ His conclusions? "I came away totally that it w ill happen sooner or later." fort to create a truly international affair. As confused." Next? He also mentions that the Honolulu In- he points out: "We realize that there are FURTHER ON FINISHES a limited number of people who are inter­ Creating a light-weight, warp-free finish Continued on page 83

All-balsa rubber powered Sommer Monoplane constructed by model ber-actuated variable incidence tail, his Peanut Dyke Delta, and Bill book author Amos Hadas, of Israel. Hannan's low A/R demi-delta with tissue covering on bottom only. MARCH 1985 49 This Pistachio Cub Coupe by Florida's Millard Wells has flown for A tiny Grapenut model of the Found, by Walt Everson, weighs in 45 seconds. Span is a monstrous eight inches! at 1.49 grams. The quarter gives you an idea of its size. the center of the room). I looked down to get my bearings. The flyers appeared so small 100 feet below! To get to the rim of the dish I had to crawl through several steel triangles of bracing (supporting the dish) that were very tight for my 160 pound frame. Finally I reached the rim and found that a previous retriever had left a 10 ft. pole to help in reaching stuck models. It was necessary to reach out ADVENTURES IN RETRIEVAL STANCES ALLOW CHILDREN TO CLIMB three feet from the dish (while hanging Part of the scene in indoor modeling INTO THE STRUCTURE OR CEILING OF onto the beam with one hand and the has always been the retrieving of those A BUILDING! pole with the other) to snag my model air­ hung-up airplanes. It happens to all of us. If it is possible to reach the model by plane. Carefully the ship was dislodged The turn on a new plane is not yet perfect­ climbing, proceed with caution. Remem­ and away it flew. It bumped again, stalled, ed or a warp develops (from setting in a ber, dust covers most surfaces that are out and dropped down four feet below the damp garage) or an open window creates of normal reach and dust is slippery. If the beams. Then it began its descent toward a draft, but nevertheless the model veers structure is wood inside it might be ricke­ the floor. After squeezing back through off course and hangs up on a beam. ty, loose, or rotted. Don't climb out to a the triangles, I brushed the dust off myself Maybe the rubber motor you select is just place where you can't get back safely. and noticed that my wallet was gone. The a tad too powerful and the craft climbs Consider taking along a pole or fishing squeeze was so tight that it pulled the right into the ceiling and lodges where it rod to lift the model free and release it wallet right out of my pocket. I went back cannot be bumped with a balloon. WHAT into flight. up to the dish again that day to get TO DO? I for one don't want to leave my At some larger indoor contests a climb­ another modeler's plane. My clothes were little beauty there at the flying site. er is chosen to retrieve aircraft. Let him do a mess by the end of the session. The first thing to consider is whether the the climbing if you can. Last year, while flying at the blimp han­ custodian of the building will allow the I'm sure some of you have some great gar at Santa Ana, my newest flapper stuck flyers to retrieve “stuck models." It is far stories to relate about retrieving your in­ up on the inside lower roof. To get to it better to ask permission to go after it than door ships. Once at West Baden, my meant a climb up a 20-foot wooden lad­ to just start climbing and get the guy mad microfilm model got stuck near the big der. I asked someone if I might go up for and perhaps cancel all indoor flying from dish in the center of the room. I was not it. The answer was affirmative. I was not then on. Imagine the insurance problems about to leave it there. So I took the eleva­ up on the roof more than five minutes involved if a modeler is injured at a local tor up five floors, walked up the last floor when an officer appeared beside me. school gym. If you are lucky enough to be and opened a door out to the lower roof. "Who told you you could come up here?" flying in a military facility (Blimp hangar After climbing a steel attached ladder, I he asked. "One of the regular flyers!" I or reserve armory) don't climb without found myself at the edge of a huge circular said. He retrieved my model himself and permission. If climbing is allowed, make roof. Up and across the roof I went and directed me to follow him down the lad­ darn sure the climber is not afraid of came upon a vertical door at the center of der. At the bottom he insisted that I take heights, or prone to dizziness, or have a the roof. Inside the door, a wood ladder him to the person who OK'd my retrieval. trick knee, etc. UNDER NO CIRCUM­ let down six feet to the top of the dish (in Reluctantly, I lead him over to the modeler.

Expert workmanship is evident in this microfilm duration model. It Millard Wells is adjusting the rudder on his 5-1/16" span PAMA takes a while to develop the skill and touch to build and fly them. Pistachio Ridotto (reduced)model. Photo by Bob Andrews.

50 MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 106

VZ0"3aha Sheet in Jilm Scene 1964- Philadelphia,Bz. Λ 25'Ormtiiopier &■ FToiaii SirdyFiltn MODEL BUILDER magazine ο Plan No: 3£53

pole was passed up to him. Carlo was then able to lift the model free and away it flew. He knew that I was injured in a truck accident many years ago and this type of climbing was beyond me. I ap­ preciated his effort.

ENCINO DEMO Recently your indoor editor was asked to demonstrate indoor models for two as­ semblies at the Encino (Grade) school. Photo of "B irdy" showing crank mechanism. Upon arriving, I discovered that I was the entire program! After a few minutes of He admonished both of us and stormed off. model trimming in the small auditorium I left for home that day feeling pretty low. the first group was lead in. Grades One On the brighter side, the Burbank ses­ through Three comprised about 120 kids. NEWS RELEASE sions are a real contrast. When the Black They were so excited to see the first The National Free Flight Society an­ Sheep group flies indoors at Luther Bur­ models fly. After 30 minutes of screaming nounces that the Fourth United States In­ bank gym, the custodian is a prince. Sev­ youngsters, the group was led out. In 15 door Championships will be held on June eral times lately my models hung up minutes the older kids arrived. An even 18, 19 and 20, 1985 at the Niagara Falls In­ there. A word to the custodian brought me bigger crowd. They were even sitting on ternational Convention Center Arena. a step ladder and a pole to dislodge the the floor just in front of me. After flying EVENTS: Hand Launched Glider, F1D, models. about 20 models, I gave a brief talk on the AMA Stick, Manhattan, Bostonian, Or- Last session, my new ROG lodged on a reason birds can fly, etc. The next day my nithopter. Autogiro, Pennyplane, Novice vertical pipe at 14 feet. Carlo Godel came school contact, I la Hebert brought a stack Pennyplane, ROG Cabin, Unlimited over and offered to climb up to save it. He of about 30 'Thank You" cards from the Speed, Peanut Speed, Easy B, Paper Stick, jumped up from a stack of mats, caught students. One card from a little tot said Peanut Scale, AMA Scale, and the MIAMA onto a thin ledge and hoisted himself up. "Hi there, how are you? I like your planes. Peanut Grand Prix. Pressing his body against the wall he Do you like them? Don't answer that. That This may be the largest indoor contest inched his way over to the model. A long was a dumb question. Love, TAMI." in the world, with enough events to satisfy

MARCH 1985 51 Free flight expert Bill Warner, of Los Angeles, always ready to help young modelers in trim ­ ming and flying. See his warning about use of Boron filament in "Workbench" columa everyone! The category III ceiling is 70 Philadelphia, Pa. low. Three weeks later the six models feet high. There will be lots of lodging fa­ During his high school days, he built were all complete. When word came that cilities and campgrounds. Many other ac­ and flew an ornithopter for his science the shooting date was near, a model box tivities are available for the family, such as class. This is the scene the movie people was modified to house the airplanes. The Fantasy Island, an art gallery, museums, had in mind for me. They needed several movie people were notified that I needed aquariums, boat rides, etc. Canada is just model ornithopters for the film. an airline ticket for myself and one for the a bridge length away. I asked how they had located me. It model box. I wanted to keep the ornithop­ For all the details, send a large enve­ seems that the crew was aboard an airliner ters with me on the flight from Los Ange­ lope, stamped and addressed, to: A.J. heading east when one fellow, Don Wat­ les to Philadelphia. The models and I ar­ Italiano, 1655 Revere Dr., Brookfield, Wl son, noted an article in the airline maga­ rived on Sunday evening and Monday we 53005. zine. The story was about indoor mod­ were taken to the school to test the room. NOTE: Entries must be in by no later eling and Ken Johnson's name was men­ Mr. Kirkland helped me into the 1905 than April 24, 1985. NO EXCEPTIONS! tioned. It stated that the L.A. Times was school where the scene was to be shot. "BIRDY TAKES WING" my employer, and that was enough for The room was very authentic. It was like About December of 1983, your indoor them to track me down. going back in time to my own high school editor got a call one morning. The voice Several weeks later, Jeffery flew out to days. I was told that the flappers could on the other end asked if I might be in­ L.A. to visit. After examining about 30 of only fly about eight feet high. WOW! terested in building several models for an my flappers, he left. Several months later How was I going to impress them on how upcoming movie. The lady explained that he returned with his camera. He shot vari­ high and how long the craft would fly? For I would be receiving a call from Jeffery ous models and we flew one in front of about three hours the models were Kirkland of the production crew. Later that my house, in the dark. Later he phoned trimmed to turn in a 12-foot circle and for day, Jeffery phoned and gave me the de­ and said that the movie people had made almost one minute of flying time. tails. A film was in progress, about a sol­ a choice of a style of ornithopter they That evening 35 motors were made up dier in a veterans hospital, under psy­ wanted. It was a combination of two de­ for the next day's shooting. chiatric care. Fie was in bad shape mental­ signs, but looking mostly like the "DiVinci At 10 a.m. a van took eight crew mem­ ly. The doctors felt that, by using recall, he flapper" he had seen at my home. Con­ bers and Ken Johnson to the school. The could be brought back to reality. The film struction was begun. The scene dictated gal sitting next to me was in wardrobe. follows his early years growing up in that the model be flown over the students The one behind was in makeup. The in class and then crash into the wall, then school was flooded with people. Student the kids would all laugh. actors were all dressed in winter clothes. The assignment was for six identical The temperature was about 98 and the hu­ flappers. I didn't know whether the design midity was very high. I asked to fly again would fly or not, so one test model was in another room to test the new motors. In completed. The living room test flights a few minutes the director brought a looked good. The craft was taken to our young man into the room. local flying session at Luther Burbank 'This is Mathew Modine," he said. High gym. The first flight looked great un­ "Mathew is the star and he wants to meet til it collided with another model and the you and see the ornithopters." He ap­ wing was crushed. After repairs, a second peared to be about 16. He related that he attempt was made. It climbed to about 15 was 25 years old. What a nice young fel­ feet and circled nicely and landed just be­ low. We chatted for about an hour as I hind a modeler about 30 feet away. I flew the models. He asked to have one of called to him not to move, but he didn't the ornithopters after the shooting was hear and took a step backwards. Crunch! complete. Of course, I agreed. Then the Back in the box it went. word came to start shooting. After more repairs, I decided the flapper The students were all seated, the crew was airworthy and began construction. A C O 2 rogallo indoor model. Hard to trim , as it prefers to fly straight. Trimming is tricky, Several paper color swatches were mailed but rewarding when successful. out and the color chosen was a light yel­ Continued on page 87 52 MODEL BUILDER

No, Doc Martin is not reaching out to pinch the Peanut Ansaldo's Jack McGillivray with his outstanding S.E. 5, during the Detroit ta il.. he just launched it! Photo by Frank Scott. Peanut Gran Prix. Photo by Frank Scott

Here's Millard Wells again (see "Indoor") fly­ ing his PAMA. Was crushed when an explod­ ing rubber motor startled person holding it!

Doc Martin gives his Elias Airsport 'Pistachio Mike Colling, England, flew this CO 2 Hovey Nut' about 300 scale ft. of altitude at launch, Wing-Ding during Detroit Indoor meet. during the Detroit Peanut Gran Prix. Scott pic. Frank Scott photo. and Frank Zaic's Streamliner by R.N. participants. Thanks to Frank Scott, we have some Bullock. F light magazine of that time Curtiss Hawk built by Canadian Jack McGill­ described the U.S. entries as “ very well- ivray, though 'not quite finished', was a splen­ photos and a few details. Formerly held finished specimens.” did flier. Frank Scott photo. at West Baden, Indiana, for 24 hours at a During the 1984 Anniversary event, stretch, this year’s meet was reduced to two classes were flown, one for four- the meeting made him a present of it. five hours’ duration because of the high ounce minimum model weight and one “The Mayor of Warwick conducted cost of building rental ($500 per day!). for an eight-ounce minimum, reflecting the prize ceremony: It was a truly In addition to Peanuts, the spon­ rules changes over the years. wonderful day and my Gutteridge soring Miami Indoor Aircraft Model Participant John Blagg offered this Wakefield did not let me down. It did Association flew Pistachio Nut models, report: “ On June 24th I made the 80- not make the fly-off, but it certainly which just may be the next sweeping odd mile trip to Warwick: a beautiful performed very well.” development in flying scale. These city for the Wakefield Anniversary. Winner of the four-ounce class was incredibly small aircraft range in size Probably this is one of the best non-scale Bernard Aslett flying a 1936 Lanzo from eight-inch wingspan (or six-inch meetings I have ever attended. I went reproduction, while first place in the length) down to a mere 5-1/16 span, yet dressed for the part (in vintage togs) and eight-ounce class was Phil Ball flying a they are capable of impressive flights. Ron Moulton's comments were as 1938 H i Ho. But really, every entrant was Dr. John Martin, moving force behind follows: ‘John, what a great shame that a winner in this historic Wakefield the Peanut Gran Prix, intends to increase such sartorial elegance is so seldom seen Anniversary contest. As Ron Moulton so promotion for the Pistachio class for on the flying field today!’ aptly put it afterwards it was, “ One of next year, planning for increased inter­ "There were over forty Wakefields of those delightful experiences that linger national participation, in what may all types from the early thirties up to the on in memory and refresh one’s represent the most practical category for mid-fifties. All had to rise-off-ground, energies and inspirations." proxy-flying ever conceived. and in the stiff breeze the attrition rate THE PEANUT GRAN PRIX In summary, very few recreational was as high as one in four. This was a study in contrasts to the activities can offer the variety found in “ Walter Getsla, who had been unable Wakefield Anniversary contest, as it was model building and flying. If you are to attend in 1934, made the journey over conducted in Detroit, USA, for tiny, among those who have always avoided from California (he is now in his 70s). indoor flying scale models. However, it contests, why not try one of these Mike Heatherington had made a repro­ too attracted visitors from other coun­ relaxed events? Part of the fun is in the duction of Walt’s 1934 model and after tries and was equally satisfying to its sharing! ·

MARCH 1985 57 The author's Jumbo Scale Lockheed Vega, Wiley Post's high altitude research ship, the Winnie Mae. Selected for its unusual features: drop-off landing gear (less drag, less weight), massive supercharger intake, two-tone blue trim , and LOTS of lettering! LETTERING TECHNIQUES By MARK FINEMAN . . . Interesting scale model subjects can often be covered with lettering that needs to be duplicated. It's either a choice of unmarked aircraft to scale, or learn how to apply lettering.

• Deciding which model to build next is idea how I would bring it off, but therein fore spraying a model. I've also found that an endless perplexity. Sure, there are lots lies a tale. it is better to apply several fine coats than of plans down in my files, hundreds of Construction was straightforward trying to get the full thickness of paint in magazines, and a shelf full of kits, but enough and I even managed to modify the one application; the first coat should be which one w ill ignite that little spark, will original plans so as to incorporate a de­ the finest misting possible, with subse­ set the gears in motion, and have me tachable, plug-in wing that has worked quent coats applied only when earlier hacking balsa 'til one in the morning? flawlessly. Inevitably, of course, I had to ones have dried. Sometimes the plan itself inspires me, face the worst of it: all that lettering. The Vega side trim was a matter of luck. sometimes it is a magazine article, photo­ The upper wing surface, as was the case I just happened to have two shades of blue graph, or three-view that insinuates its with many Vegas, had a dark center panel tissue that matched the original colors magic. I once designed a Cessna AW pea­ (dark blue in this case) with light registra­ perfectly, so the shapes were cut using a nut because I fell in love with a photo­ tion numbers. To accomplish this, the tracing of the trim from the plans and graph of the real ship; my Nikitin-Schev- panel was masked off with drafting tape doped in place. The white wing registra­ chenko fighter grew from a three-view and and then sprayed with dope. Drafting tape tion letters were cut from white contact an artist's impression of the airplane in is preferable to masking tape because it paper. Although these look O.K., I'm not flight. can be peeled off more easily, lessening sure I'd do the letters that way again as the In the case of the Lockheed Vega, the the chances of ripped tissue. The spray rest of the covering is semi-transparent, bug that bit me was hatched while I was painting was done with an old-fashioned but not the wing registration. reading one of the Smithsonian Annals of artist's atomizer. These are still available at Of course that still left the fuselage let­ flight volumes on Wiley Post. Out came art supply stores and look like two metal tering and the moment of truth was now the 36-inch span Comet plan of the Win­ tubes at right angles to one another with at hand. The words "Winnie Mae" on the nie Mae (still available from Golden Age a gap where the ends of the tubes inter­ fuselage were cut from the same light blue Reproductions, P.O. Box 13, Braintree, MA sect. Mix up some very thin dope, about tissue that had been used for the side trim, 02184), and I knew I had to build this the consistency of water, dip the longer then doped into position and shading ad­ 1936 jumbo job. Now high-wing cabin tube into the paint bottle, apply lips to the ded with a dark blue, fine line, permanent models can get a bit repetitious, so there short tube, and BLOW. Out will come a marker (Pilot brand, ironically enough). had to be something to set my ship apart fine mist that coats beautifully. No com­ Everything else, I knew, would have to be from the rest of the look-alikes, and the pressors, no airbrushes, no canned done with decals. high altitude version of Post's aircraft had air...just raw lungpower. To clean my Decals? I only had a detailed plan and it all: a distinctive paint scheme with two- atomizer I just poke some rolled up bits of a three-view. The model hadn't been kitted toned blue trim, drop-off landing gear paper towel through the paint tube with a in 45 years and probably hadn't come (read that as no landing gear) with belly length of wire, like cleaning the bore of a with decals even then. Some of the decals skid, massive supercharger intake, and gun. As long as a paint scheme requires were made using a clever trick that pro­ lettering. Not just lettering mind you, but nothing more complicated than masking duces astoundingly good results. A decal what seemed to be acres of lettering! This two separate colors, the atomizer should can be made by burnishing pressure- plane was covered with the stuff. At the work just fine. If you've never used one, sensitive lettering (Presstype, Letraset, etc.) time I had started construction, I had little though, practice on old newspapers be­ directly on to blank decal paper. Some 58 MODEL BUILDER blank decal material is nothing more than a paper coated with "decal glue," in which case you will have to spray the paper with a few coats of clear dope to act as a base and carrier for the lettering. Other decal material is already coated and needs to special preparation. You can obtain the latter by saving the scraps from com­ mercially produced decals, or by buying it directly in larger sheets. The stuff I use is manufactured by a company that makes decals for model railroading and is avail­ able in many hobby shops. Still another variation on this theme is to apply the pressure sensitive lettering directly to a bit of tissue the same color as the model's, trim it closely, and then care­ fully dope the lettered tissue to the model. The double layer of tissue is all but invis­ ible. You do have to work with a light touch since dope applied over the letter­ ing tends to crack it. Both the tissue...and decal-mounted lettering work exceedingly well, and as the lettering can be obtained in such a wide variety of sizes and styles, the types of decals possible are almost Nose detail. TWA markings are combination of cut tissue and pressure-sensitive type applied to endless. blank decal material, which is then applied to model in the usual way. But getting back to the Winnie Mae, that still left a great deal of extremely background of the copy has been peeled markings, but suspect that other ways of small details, such as the listing of the away and is now clear. making colored decals should be possi­ cities Post had passed in his famous This membraneous Decalon decal is ble, perhaps by working from a colored 'round-the-world flights, and various world still difficult to maneuver since most at­ Xerox copy. Fortunately for me, there are records painted on the aft fuselage. Here tempts to lift it from the water just make a heck of a lot of black aircraft markings. again fortune smiled. All of the lettering it turn back and adhere to itself. The decal One advantage of this system is that the was present on the plan, so the object be­ also has no adhesive attached to it. To get original artwork is always preserved, as came to get the lettering (actually copies around these problems, I devised my own you only work from copies, allowing un­ of the lettering) on to a decal. Enter system that works quite well: A small rec­ limited reproduction of the same design. "Decalon." tangle of waxed paper is cut just slightly Pressure sensitive lettering is getting ex­ By sheer dumb luck I happened to be in larger than the decal, and a few drops of pensive and I would like to use as little of an art supply store and asked if there was diluted Elmer's white glue are spread it as possible. One final word of caution: any way to make decals from scratch. The across it. Then, using tweezers, one end of the larger the Decalon decal, the more answer was "yes." For less than $4.00 I the decal is fished from the water and the difficult it is to position. For a large de­ bought two generous sheets of Decalon, whole thing is slipped on to the glue- sign, you may be better off breaking it an amazing product that should have coated slip sheet. It can then be handled down into smaller sections. wide application in model building. much like a conventional decal. Just lo­ If you cannot find Decalon decal medi­ Here's how it works: cate it into its proper position on the um in your art supply or craft store, don't First, one should have a copy (Xerox, model, adhere one end in place and slip write to me! Write to the company: San- 3M, Kodak) of the artwork to be made into out the paper. Blot with tissues to remove gray Corporation, 2318 Lakeview, Pueblo, a decal. In my case I just copied the letter­ excess moisture. Colorado 81004. · ing from the plan. The Decalon material I have only tried Decalon with black resembles double-sided Contact paper, that is, the decal medium has pressure sensitive backing paper on both sides. Next cut a piece of Decalon just slightly larger than the material to be made into a decal. Carefully peel away the brown backing paper and adhere the Decalon to the artwork; burnish thoroughly with a blunt instrument. Then peel away the white backing paper to reveal the original artwork copy with what appears to be a plastic coating over it (the coating is the eventual decal). T H l The decal at this stage must be soaked in water for a period of at least 30 minutes • Of OKI ΛΜΟΜΛ (a drop or two of household detergent seems to help the soaking process). Even­ tually the fibers of the remaining paper become soft and can be rubbed away with the fingertips. Be very sure to remove all of the paper fibers so that none will be transferred to the model. Now here is the really amazing part: You will then be left with a thin, plastic membrane that has picked up all the artwork from the copy! JtratfnnaJnHS,ah sever^ * imesJ n a r°w and you're ready for a waltz!). Both the rudder regi­ The part that had been the white paper s t r a r and the lettermg below the trim stripe are Decalon decals (see text). MARCH 1985 59 iiy u a By MIKE HAZEL PHOTOS BY THE AUTHOR

"Sure we can be bribed!" Stunt judges Bob Parker (left) and Jim Parsons seem to be en­ THANKS FOR THE MEMORY DEPT. wing in a profile that I've ever seen goes joying duties at '84 NW Regionals. Bergstrom. In one of the photos you will see what like this: The wing should slide easily into is simply a layout of photos. I have recent­ the slot with this method. It should not fit ing epoxy into the joint until it is full. Af­ ly started the practice of taking photo­ tightly. Line the wing up and tack into ter the glue has hardened, go back and graphs of my projects at key points of place w ith CA (cyanoacrylate... mwh) or do it again, as some of it w ill have soaked construction. These photos were of details five-minute epoxy. Then, tape all around into the wood, and there w ill be some with a tank and fuselage blank for a jet the wing-to-fuselage joint on one side of gaps. The joint should be completely full. speed ship. Critical dimensions can be jot­ the fuselage with masking tape. I like to Needless to say, there better not be any ted down, and construction layout can be tape the outboard side. Then, hang the leaks in the wing, or the controls w ill be sketched, but nothing beats a real picture piece by the leadouts, or prop up so the really stiff! for reference. tape side is down. Now, drip slow-harden- "The 'built-up' profile fuselage works That particular project was being built fine, but, if you aren't very careful about from plans, but modifications were being wood selection and glue, it ends up made that needed to be accurately docu­ weighing about as much as a solid one. mented. Now that the details have been Also, it can't be carved to a nice oval sec­ recorded for posterity, they will be invalu­ tio n, and is really a mess to repair when able on the next similar project. it gets broken. I like to run a piece of ★ ★ ★ spruce down the center of the fuselage in I have received a few letters from CL a position so that the stab w ill be glued readerland, and would like to share some to it. It adds very little weight, and makes tidbits from a couple of them: things a lot stiffer. It's also easier to build George Lieb, of Omaha, Nebraska, profiles without the wing opening, then wrote in response to the "invisible CL" sit­ drill a hole and cut the wing opening uation, and with some good construction later." hints. Next we hear from Tom Dixon, of Atlan­ " .../ agree with what you say about ta, Georgia. Tom has a few points to make many so

People's Republic of China FAI Speed team used this engine make U.S. FAI Speed team member Carl Dodge built and uses this .15 en­ effectively at World Champs. Looks similar to Rossi 15. Red head. gine. Beautiful workmanship. Both engine pics by Gene Hempel.

60 MODEL BUILDER Bob McKinney (left) readies his Profile Carrier Hellcat entry, while Author used a series of photos to document construction details for George Cox kibitzes. Note inboard tank, racing style LG. Williams. fu tu re use. See te x t. Hazel p h o to .

"RC airplanes became the latest adult The last couple of columns you have toy in a long line of passing interests. probably noticed that some attention has Probably RC helicopters are the worst in been given to the subject of the modeling a way, as nobody could b u ild a helicopter, industry, and the current relation of Con­ or would even try, without the kits that trol Line activity. It is one that I will con­ are available. I don't know how many peo­ tinue to pursue until some more important ple I've seen come into the local hobby points and opinions have been fully ex­ shop and plunk down the bucks, or more pressed. Please don't perceive all of this as usually, a credit card for a 'copter, radio, "cryin' the blues," but it's as Rodney Dan- and engine. These people seldom have gerfield says, "I don't get any respect!" any previous modeling experience at all. speaking for the CL fraternity. You just want to te ll them to save the Control Line continues to be a viable, money, because there ain't no way they're but admittedly not very visible, segment Midwest Skyraider by Gerald Schamp awaits going to get it put together and get it fly­ of the aeromodeling hobby. If the industry paint job. Mods to kit include; built-up profile fuselage, sheeted wing. Enya 40 engine. ing. It's the (plastic) 'ready-to-fly' disaster continues the trend of hawking instant- taken out to the n-th degree. gratification pseudo-modeling, with an ha. Bob Furr was the author of this infor­ "Essentially the manufacturers, with few emphasis on big ticket items, CL will mation. The first bit may be of interest to exceptions, are interested in selling, not probably continue to become less visible. carrier fliers. modeling. Control line is too low buck to Please let me make it clear that I have "Many carrier aircraft have flaps to in­ bother with. They are not interested in peo­ a healthy respect for all real aeromodelers, crease lift and drag at low speeds. For the ple who want to learn a skill, but rather whether in RC, CL, or FF. I particularly ad­ most part, modelers have stuck with sim­ the focus is on the 'modeler' as a con­ mire the individual who is genuinely pro­ ple flaps that hinge on the trailing edge of sumer, not as an artist. It is as if the mar­ ficient in all phases, but with the age of the wing. This works, is simple to build, ket provides ready-made Picassos instead specialization these are few and far be­ and to activate, but if you want to do a lit­ of teaching painting." tween. The real objection here is with the tle experimenting, you may be able to im­ "Maybe we need to start an anti-instant individuals who will buy their way into prove performance somewhat. Full size toy protest, like the anti-war movement of the hobby, pretending they are modelers, aircraft use a variety of lift increasing the 60's! We need a hippie revolution in and the industry members who cater to devices, including flaps, slots, and bound­ modeling, with back-to-the-basics, organic this. Enough soapbox for now! ary layer control. The last one you may models that you can make yourself. What ★ ★ ★ have not heard about. By using a large a novel idea! A ll it takes is time, curiosity, Now for some tidbits gleaned from the manual dexterity, patience, ability to read newsletter of the Orbiting Eagles Of Oma­ and think, and a willingness to try. Money is optional, but not really required." Thanks for your input, Tom. One point that is really hitting the nail on the head is the sentence, "all it takes is time, etc...." In our ever changing society, with increasing "sophistication," the true aes­ thetics of modeling have simply become an aspect that seems to be a concern of a decreasing number. The scenario of the would-be 'copter ace is one that I have also seen. The local dealers have this happen ail the time. I have heard several horror stories from dealers who sell stuff to an imitation modeler who wants no advice in regard to building and flying what amounts to an accident looking for a place to happen. I wonder how many of these types of peo­ ple are drawn into the hobby attempt by the types of advertisements that seem to be selling an "image" of modeling, rather than the real stuff. MARCH 1985 61 Bill Barr, Lexington, KY, lights fuse on "A un­ Bill Gaiser is happy with his Black Bullet (but Bob Stalick shows launch technique for his tie Freez" (Linstrum design) . First in Coupe it's blue!) Site is Harts Lake Prairie, Washing­ D Quell. Model is silk covered. Epoxy and at COFFC fall annual. Photo by Jennifer Barr. ton. glass clothup front. Photo by Bill Giffen. lander." However, this three-view is the "Zoot Suit." Except for the fin layout and the high incidence angle, it could pass as a Dixie­ lander. The original was powered by an El­ fin diesel 1.49cc disp. The plans do state that this model is suitable for any engine between 1.5cc and 2.5cc (.09 to .15) in­ cluding the K&B .15. The ship is trimmed to fly right-right in a corkscrew type of climb with glide adjusted by right stab tilt. The fuselage at first glance may appear signs are either OK or No! Ralph and Bob to be a typical all-balsa box, but in reality, w ill also serve as a two-man approval it's built with an open framework behind board after the list gets aired. John Pond the pylon .. . much the same as the made up a preliminary list which was a "Matchsticks" design. good jump off, but it had some errors and I guess the message behind all of this is: omissions in it. Anyway, that's how I stum­ if you can't prove the Dixielander to be a bled onto the Dixieland problem. Sorry! legitimate Nostalgia model, then why not Sometime, I'll send you some good news." try for the next best thing. . . the Zoot WELL . . . EXCUUUSE ME! Here all Suit. This three-view should get you on along I thought I had the right to make your way to doing just that. those determinations. After all, I am a big- MARCH DARNED GOOD AIRFOIL . .. time free flight columnist, aren't I? Well, The S-EX-G 9035 maybe not big-time. Well, maybe not. So, Last month, I covered some of the • After extolling the great virtues of all of you folks who wrote to me telling George Fuller's "Dixielander" design as me what a great idea the "Dixielander" the perfect answer to the Ram Rod in Nostalgia idea was can direct your atten­ Nostalgia gas, think how silly I felt when tion to Ralph Prey and/or Bob Larsh. Just I received the following letter from Harry to get your point directly to them, here are Murphy, one of the drafters of the original their addresses: Bob Larsh, 45 South Whit­ set of NFFS Nostalgia rules. ''Even though comb Ave., Indianapolis, IN 46241. Ralph the NFFS Sympo Report and Bob Stalick Prey, 4589 W. 97th St., Inglewood, CA of Model Builder say it's O.K., the 'Dixie- 90301. lander' has not been endorsed by the What would really help would be a dat­ NFFS Nostalgia rules (as yet, anyhow) for ed set of plans or a dated magazine article the simple reason that we can't find (Aeromodeller would be a good place to nothing-no-how as to it ever being flown look) or some dated pictures that show a in contests prior to 1957 ('Zoot Suit' is "Dixielander." Remember, the cutoff date O.K.). Until we can get a confirmation, (year) is 1957. The ship must have been you might wish to notify your area guys designed and flown prior to Jan. 1, 1957. that any NFFS sponsored Nostalgia gas Now, you scroungers. . . gopher it! event won't honor the thing. Meanwhile, THREE-VIEW FOR MARCH . . . I've got 'Birddog Bob' Larsh out sniffing The "Zoot Suit," by George Fuller the trail. If anyone can locate the origin, With the above rebuff in mind, I present it's him. for your Nostalgia consideration, another "Tony Italiano has Ralph Prey and Bob Dixielander-like creation from the hand of Larsh pounding out an eligible design list the Dixielander creator, George Fuller. to brush away all of the 'fuzz' on question­ This is the "Zoot Suit." In the Aero­ able designs. This is a good deal without modeller article, supplied to me by Peter a doubt, and a lotta work! Larsh did the Lloyd of Australia, it plainly states that Kevin Collins, top Nordic flier in N.W. and engine list and now he is volunteering to Fuller, a jazz musician, has designed and Strat O Bats treasurer, with his winning A/2 play policeman, with Ralph Prey to nail flown many models named because of his before heading for Seguin. Taken at Harts down the gas designs so that all the de­ profession. Among these is the "Dixie- Lake Prairie. 62 MODEL BUILDER parameters that Barnaby Wainfan stressed as characteristics of a good gliding airfoil. This month, I thought I would try my hand at designing an airfoil that would meet each of the parameters stated . . . thus, the Stalick-EXperimental-Glider 9035. If noth­ ing else, the title of the section should catch your eye. Essentially, this section has a 9% highpoint at the 35% mark. The un­ dercamber follows the mean camber line and is modest as far as usual practice goes; however, in order to get appropriate thickness for the construction methodolo­ gies, it would be difficult to have an airfoil much thinner. I have suggested two possi­ ble construction methods to use. Method No. 1 is a D-box style system using 1/16 sheet on both the leading edge top and bottom cambers. The spars are 1/16 x 1/4, and the spar web is 1/16 balsa vertical grain. A spar doubler is shown to enhance the strength near the root of the wing. Added strength could be gained by using carbon fiber on the outer surfaces of the spars. Method No. 2 is the standard sheeted leading edge system with a cap strip be­ hind the top spar. All sheeting in this ex­ ample is 1/32 balsa, including the cap strips. Spars are 1/8 x 1/4 on the top and 3/32 x 1/4 on the bottom. A spar doubler is shown once again, but this example continues throughout the span of the wing in order to provide a base for the sheeted leading edge. The spar doubler is 3/32 balsa with vertical grain. I'll be the first to point out that no one you can win yourself a free one-year sub­ a little, and that put him in a tie with has built a model using this airfoil. That's scription to Model Builder. If you built Frank, so we'll dish out two one-year sub­ why it's labelled as Experimental. I would one way back when, and have a story to scriptions to the winners! Congratulations be very interested if someone were to try tell about it, so much the better. . . you Phil and Frank, (wen) it out and see just how it performs. If you may find it published right here in M.B. THERMALS are game, give it a try and drop me a line It's what makes a mediocre free flight with the results. A picture of the model JANUARY'S MYSTERY MODEL WAS... model look like a world beater. It's what (and the modeler) would also be appre­ 'Tomahawk," designed by the late Paul makes for marvelous "still air" times. It's ciated. I hope you try it. Del Gatto and published in the Aug. 1950 something you cannot see, seldom hear, issue of Model Airplane News. Phil Oes- but occasionally feel . . . I suppose some MARCH MYSTERY MODEL tricher, of Fort Worth, Texas, had the cor­ can even taste it. It's the thermal. Recently, O.K., you old model freaks. Here's one rect answer with the earliest postmark. I came across this sketch in the Thermal to test your memories. Technically, this de­ Franklin Warner, of Newport, Washington Thumber that explains in easily under­ sign qualifies as a nostalgia model, al­ was also correct, though his answer was stood form, just how a thermal looks (as­ though it was carried in a national postmarked later... However, applying the suming that one can be seen). Look at the magazine in 1958. No, that doesn't qualify handicap to Phil's answer backed him up sketch and read along. it. . . it's the fact that this design represents the 21st delta designed and flown by the author of the construction ar­ ticle. It could be flown with any engine between .049 and .15 . . . noting that with a .15, it really came into its own. Enough hints. If you can name it and get your response in to Bill Northrop's hands first,

DARNED GOOD AIRFOIL - the S-EX-G 9035

S ta tio n 0 1.25 1.5 Z 5 5.0 7.5 10 15 20 30 40 50 60 70 80 90 100

U pper 0 1.30 - 2.28 3.26 4.57 5.55 6.86 7.84 8.90 8.82 8.17 7.84 6.20 4.57 3.26 1.0

Low er 0 0 - 0.3 0 0.65 0.78 1.37 1.63 1.96 2.61 2.2 8 2.22 1.83 1.63 0.98 0.65 0

MARCH 1985 63 MODEL BUILDER Peter Lloyd's version of the "Zoot Suit", this month's 3-view design Another shot of Bob Stalick and his D-Quell taken by wife Barbara, by George Fuller. Good choice for Nostalgia event K&B .61, 1300 sq. in. Scene is Parker"s field, in Oregon. Thermals, by their very definition, are downwind of the building thermal. shops. I'd suggest you send him an SASE air currents caused by the air at two adja­ Most of the successful detection systems for the list. Send to Joe Wagner, 12 Cook cent locations being at different tempera­ are based on noting the breakdown of the St., Rowayton, CT 06853. Tell him you tures. The difference can come about by shadow. The problem is separating out read about it in Model Builder. heating one location more than the other this breeze from the breeze that is the While you are at it, it's probably time to (the usual daytime condition) or one loca­ result of a simple local gust. Streamers, renew your NFFS membership . . . or to tion cooling more rapidly than the other fluffies, and the like, w ill tell you if a wind join, if you haven't gotten "A Round Tuit." (the evening or night condition). The is blowing and what direction, but cannot A year's subscription is $15.00. Send your difference in temperature does not have to distinguish a thermal. money, along with the usual name and be large . . . a couple of degrees is enough A PLUG FOR THE NFFS address information to NFFS, 8383 Zan- . . . as long as the distance between the As Charter Member No. 1 of the Nation­ canaro Ct., Citrus Heights, CA 95610. two locations is small. Obviously, if the al Free Flight Society, I would be remiss if FINALLY, THE END . . . BUT FIRST . . . distance is too great, the potential energy I didn't promote the premier organization Ralph Prey passes on this little tidbit due to the temperature difference will get for free flight activities in the world. The about patching those holes in silk or other consumed in turbulence caused by the NFFS does represent all of us who are in­ doped coverings that have an epoxy paint surface roughness while the cooler, den­ terested in the promotion of free flight. In over them. I have always kept a tube of ser air is moving to the warm spot. addition to the Free Flight publication, AeroGloss cement in my field kit for just The common concept of thermal forma­ orfe of the most complete currently avail­ that purpose. It has yet to fail me. When tion is shown in the accompanying sketch­ able, the NFFS also provides a number of I get a big rip in the covering, I glob a es. It conforms reasonably to observed other services. One of these services that bunch of A-G cement on the rip and conditions, doesn't violate any basic physi­ I availed myself of lately was the supply bridge the gap with it. Then, using mask­ cal laws, and is a convenient means of department. Finding myself in need of ing tape, I pull both sides together and visualization. It has the objections that the some new pacifier tanks and always on leave the tape in place for a half hour or warmed air is treated as a bubble with a the lookout for good quality Japanese tis­ so. Then, I gently pull the masking tape well defined outline that deflects the sue, I sent my order off to Joe Wagner, the off and the two ripped edges are drawn wind. This does not occur. The warm air proprietor of NFFS Supplies. In short order together and the hole or rip is sealed. A has no distinguishable boundaries and the I received the pacifiers and some of the little more A-G is applied over the top of wind mixes in with the warm air. Con­ nicest red tissue I had seen in some time. the rip to seal it off. Wait just anotherhalf siderable turbulence results, which effec­ The price was right, too. The pacifiers hour, and you are ready to go flying again. tively blocks the wind. A dust devil or the were 45

MARCH 1985 65 HAS GREAT PRICES

PLA N S $3.00 The Perfect Trainer H A N D B O O K PERFECT FOR or just lazy flying & C A T A L O G 4 CYCLE ENGINES BEN B#CKtE I ITS Playboy 1938 80" span. Forerunner of Ihe pylon layout offer a change of pace VINTAGE QUALITY These aulhentic kits ol the tree fighters of The ultimate powered glider with the accenl on and and power Vertical climbing and a Hat thermal yester year now with three channel radio and OLDTIMER VALUE 20 two stroke to 40 four stroke motors provide hunting glide 40 four stroke recommended. hassle free relaxed, economical Hying plus ______$43.95 care-free gala and competition Hying around the country. Buccaneer 1937 66" span 4 lb a.u.w Ideal bndge from lirsl plastic and loam Irainer lo more advanced Quaker Flash construction. Ace flyer. 1936 72" span 3Vr 1b. Inc radio. Simplest ______'______$49.50 construction with genuine reed outlines. Slow floating glide. $47.95 Majestic Major 86" span version of the famous Junior 60 Junior 60 2 piece wing for easy transportation Flies superbly on a 60 4-stroke 1946 version, 60" span 4lb. Inc radio. Very ______$72.95 rugged yet simple, the perfect introduction to R/C flying ___ $49.95 Red Zephyr 1936 72" span 4V4 lbs Super 60 The unique outline lhat sel the pace and held Long awaited return of an old favorite A safe world records in 1937 is now the easiest practical flyer for those who believe all aircraft R/C model lo fly. should have a tailwheel 3 channel radio for 35 ______$56.95 two strokes and 40 four strokes. ______$49.95 “TRENTON TERROR” FLYING QUAKER 30 - 40 engines 7 foot span 40 - 60 engines REALLY SIMPLE CONSTRUCTION $59.95 6 feet of Vintage fun BIG VERSION OF OUR BEST SELLER $43.95

“ SUPER SCORPION” HEPCAT 48” Span 86." Motors up to 40 F-S $56.95

$29.95 Fokker D VIII $49.95 Designed by Earl Stahl 57" span, not only an older tim er but a one- Lanzo Record sixth scale model for stand-off competitions. B reaker $56.95 An ideal introduction to scale flying. Suitable 8 Poet of Floating Glide. Superb under power for .19 two strokes to .30 four strokes. straight forward construction. Fully detailed Preformed U C and wire-work.' installation. THE MERCURY Champion of Champions

BAIMBN WHEELS $49.95 ANY MODEL AIRPLANE IS DEFINITELY IMPROVED WITH TREXLER PNEUMATIC BALLOON WHEELS 1936 72" span 3’/2 lb. Inc radio.

PRICES ARE GOOD ON ORDERS RECEIVED BY THE 30th OF THE MONTH OF THIS ISSUE ONLY.

When In Florida Visit Our Store. Dealer For Your Convenience: Call Any Day Inquiries Monday-Friday 9:00 am - 6:00 pm E.S.T. How To Order: Add $2.50 for insurance and handling. Saturday 9:00 am - 5:00 pm I enclose payment by: □ Check/M.O. Invited □ Visa □ MasterCard □ Exp. D a te ______HOBBY ENTERPRISES Card No. ______□ Please send my 2740 N. Hwy. 441-27 order C.O.D. Fruitland Park, Florida 32731 THANK YOU FOR YOUR ORDER! Add $2.00 904-326-4158

AVAILABILITY, SPECIFICATIONS AND PRICES ARE SUBJECT TO CHANGE WITHOUT NOTICE. The remarkable Windbag up/down, left/right (including owes its exceptional flying and steerable nosewheel) and handling characteristics to the Slow and Easy toFly throttle. The streamlined patented Flexifoil 'Softwing' cockpit is detachable and the This aerofoil shaped ripstop ITS A PARACHUTE, Windbag can be flown without nylon envelope that inflates it. Other available channels can with air through the leading IT'S AN ULTRALIGHT, IT'S A be used for example to do a edge as it moves forward is 'toffee drop' or to trigger a called a softwing since the only camera mounted to the side of rigid support is a tapered the Windbag. The cleanliness glassfibre spar in the leading of the pusher engine, the slow edge of the wing. Beautifully that make those still, late are: engine, mount, prop and flying speed and the 'no-hands' made, the big 12 sq ft wing summer afternoons so extra fuel tank. It is very easy to build stability make the Windbag does not require any finishing enjoyable. The impressive with all metalwork pre-formed superbly suitable for aerial and is virtually unbreakable ‘no-hands’ stability and th e ' and pre-drilled. The engine photography The drawing and yet packs down pocket visual impact of the lights mount, landing gear, noseboom shows a sim ple box w ith a size. that shines through \ and kingpost bolt onto the self-winding camera mounted There could be no better the colourful ' fuselage pod which is made to the side of the fuselage pod introduction to radio control translucent of 6m m multi-ply and so wing, high strong that you can With the wing m ounted on in the stand on it. The top of an alloy kingpost, the sky, foreplane’s alloy mount allows Windbag has an exceptionally it to be easily 'knocked o ff low centre of gravity and is C without becoming damaged totally self stabilizing From \ during hard landings. virtually any manoeuvre, as is a beautiful sight If you are learning to soon as you release the and guarantees to fly you will definitely controls, it will revert to level please the crowds appreciate this. flight. When in ‘stalled’ both on the field and at Even better the condition, with full 'up' and the flying displays. After the rugged, engine shut down or idling, the landing the steerable nosegear bolt-together aircraft will sink almost allows you to taxi back where construction vertically like on a parachute after a few flights, you will really allows for most repairs to be This manoeuvre can be used KIT CONTENTS appreciate the pusher engine done on the flying field rather to get out of any'panic' which leaves the craft and than having to spend all week Precision made 6ft Softwing - situation But more likely, you engine clean, since all exhaust glueing all the bits together no finishing required will soon be flying around and Compound tapered, virtually matter is left behind again. enjoying its excellent climb Easy to Build, Easy to Rig. unbreakable. GRP mainspar rate and outstanding On the field the Windbag Rugged 6 strut light alloy Easy to Repair! rigs in minutes It requires only manoeuvrability including main undercarriage The W indbag kit is three channels for the controls, loops with some 40's and Alloy mount for tough 3mm complete. Besides the radio definitely with a 60. ply foreplane geai;the only extras The combination of large Tubular alloy for kingpost you need balloon wheels and high ground and noseboom clearance is perfect for All alloy components pre­ those very low and slow fly-by's formed and drilled ' Steerable nosewheel gear with 'nose-up' and the i 3 Large diameter balloonwheels wheels only inches off • Pre-prmted 6mm birch ply the ground, or for for fuselage pod doing continuous » All materials for the touch- and-go's, streamlined cockpit typical • Comprehensive accessory pack manoeuvres including all radio control linkages, connectors, heatsink for two-stroke motors, screws, nuts and bolts and other hardware > Complete step-by-step with full size plan and exploded view

DEALER INQUIRIES INVITED

RELAXED AND EASY FLYING From your model shop or direct from ΠΤ

PRICE $ 8 9 .9 5 2740 N. HW Y. 441-27 For 40 or 60 two strokes or 45 to 60 four strokes FRUIT LAND PARK, FL 32731 904 326 4158 the wood to make it more pliable. Put the wood in place on the model (or Electric Flight mold...mwh) and use lots of masking tape or rubber bands to hold it in place. Technology In about two days the wood w ill be fully dry. When dry, the wood does not spring is Now . back as far as when it is soaked w ith water alone." Astro Challenger Cobalt motor ★ ★ ★ technology delivers unmatched flight per­ Last month's column included some dis­ formance. Pylon racers fly at 100 mph, Sailplanes climb over cussion on an AMA general rules proposal 1000 feet in one minute, and Quarter scale aircraft fly that would define usage of supercharger devices on model engines. I have since realistically. The age of electrics has come — easy, clean, been informed that this proposal has been simple and economical flying forSPORT AND COMPETITION withdrawn. What a relief! With that being in 05, 15, 25, and 40 sizes. Ask your Astro Flight Dealer for taken care of, let's discuss another area. motors and complete systems or Order Direct — and join the That area is the topic of engine mufflers. This subject always brings out some strong QUIET REVOLUTION! opinions, as any regulation enacted would Cobalt 05 . . . $75.00, 15 . . . $100, 25 . . . $125, 40 . . . $150. be a significant change in the Control Line ranks. In Precision Aerobatics, use of muf­ FLASH !! ASTRO FLIGHT motors sweep Reno flers is nearly universal, but it is not re­ Nationals! An outstanding 27 out of 28 Electric quired. The use is more a question of Class trophies were captured by ASTRO motors! aesthetics, and engine run characteristics. At present, the only muffler requirement QSTR0 FLIGHT inC for CL as dictated by AMA rules, is for the Scale event. Could someone please ex­ 13311 Beach Ave. · Marina Del Rey, CA · 90292 · (213) 821-6242 plain that to me? There is an event where generally lower power and quieter en­ gines are already in use. The latest news is that the Western As­ sociated Modelers (WAM) of Northern Californian are changing over several of their competition events to fully align with AMA rules. This means that after having a muffler rule for all their competition for many years, this is being dropped. Some­ one please fill me in on that.

We now have p la n· available for the fam ou· A-J Fireball. There is a CL proposal that would re­ Plans show all six production variants, plus FOUR modified quire muffling devices on all engines larg­ designs (including the Fireball Bipeand the beautiful Sportster X 1914 PONNIER SCOUT The set also includes the Fireball Floats with instructions and er than 1/2A. As quickly as that was a few other nice surprises. Order your Fireball Plan Pak TODAY 2nd Place, Expert Sport Scale, '84 Reno Nats and start building your own A-J AIR FORCE COLLECTION. Price proposed, others proposed that if this includes Mailing Tube and First Class or UPS delivery charges 1/4-scale, 2 ,0 0 0 sq. in., 8 -1 /4 lbs., uses any passed, certain events would be exempt. The price complete is $25.00 two or four-stroke .60 engine. So obviously, there is much disagreement P.O. Box 548 Oregon City, Plans & Scale Documentation on what to do. The typical argument in A u m \ OR 97045 as used a t Reno . . . . S 28.00 P.P. the past was the concern over lost power 1841 Whitestone with muffling devices. This is not very AVIS RARA Santa Ana, CA 92705 valid anymore. The technology with noise Control Line . . Continued from page 61 suppression has advanced somewhat, and shape of the wing and has the effect of in­ the engine technology certainly has, so pump (a turbojet works well) air can be creasing the area of the wing. Fowler flaps the power loss concern should not be pulled into the upper surface of the wing, are among the most efficient and are very there. smoothing out the airflow, reducing drag, common on high performance aircraft One anti-muffler proponent made the and increasing lift. While this may not be that need to land slowly. Sounds familiar, interesting point that combat planes need practical for models, it is interesting to doesn't it? to make the noise for safety concerns. The think about. "If you could create enough drag you reasoning was that if you did not have the would not even need a throttle on a car­ "There are two types of flaps that we awareness because of the noise, then safe­ rier aircraft. As many of the very high per­ ty would be compromised. might want to look at more carefully, split formance racing engines don't throttle Another point is that some feel we need flaps and Fowler flaps. A split flap is well, some builders have been experi­ the noise to be "visible." Well, this can mounted on the bottom surface of the menting with spoilers. RC gliders have certainly work against us, too. There is wing, and when open, the shape of the used spoilers for several years to allow upper curve of the wing doesn't change, them to fly into fields that normally they one strange contradiction on this point, however. Having been involved in flying but the flap changes the shape of the bot­ w ould just pass right over. One o f the best tom of the wing. Split flaps don't provide systems has both flaps and spoilers work­ demonstrations for large crowds, it be­ a lot more lift than simple flaps, but they ing in combination. The spoiler goes up came obvious that engine noise was an es­ do increase drag dramatically. as the flap goes down. This keeps pitch sential element of the excitement and impression that was given. Simply put, the "Fowler flaps are hinged so that they changes up and down to a minimum. The crowd expects the noise! But it is probably move backwards and down at the same use of flaps or spoilers alone can cause time. This is done by having the hinge violent up or down changes in a plane's safe to say this is the only situation where point below the wing. The simplest way attitude at full speed. Either could result the noise is not a potential problem. to accomplish this is to use nylon control in a rekit of your favorite plane... Another concern area is the obsoles­ horns to form the hinge. The control "Next time you have to make a piece of cence of current competitive equipment. horns are joined by a small bolt at the balsa curl to fit, such as on a turtle deck, This is one of the primary concerns of any outermost hole. As the flap goes back­ soak it in household ammonia. It seems proposed change. Obviously, different ward, it moves down. This changes the the ammonia has a temporary effect on types of events w ill be affected differently.

68 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Canard! H E W 1- Theory! Helicopters! CANARD: A REVOLUTION MODEL AIRCRAFT S C H LU TE R S R /C IN FLIG HT AERODYNAMICS HELICOPTER MANUAL Lennon Intro by Burt Rutan Theory of Flight Applied to 10 major chapters with 87 Included is canard aerody­ Models. Tables of Optimum subtopics Includes Basics of namics. flight characteristics, Airfoil Sections. The Scale Helicopter Technology. Rotor canards of the future, fighter Effect m Model Planes. Per­ Blades & Their Dynamics. a/c canards. & a special sec­ formance. Trim. Stability, etc. Flight Training. Performance tion covering Rutan designs. 266 pgs . 12 chapters, heavily Calculations. Construction 7Ά" x 9VT. 15 ch p trs. 78 pho­ illustrated Techniques, etc 255 pgs . tos. 75 drawings. 200 pgs.. 16061A ...... hundreds of photos & detailed sftbd. Pub 1984 drawings 1 4 2 1 4 A E ...... $17.95 21005A ...... S12.95 Now Only $14.95!

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BUILDING A FLYING Mode! Atrfimc< THE WORLD OF C d Please include $2 95 handling lee on all orders RADIO CONTROLLED MODEL AIRPLANES Enclosed is my check or money order lor * _ MODEL AIRCRAFT Winter Oevoied erckisnefy to Charge to my Q M C DVISA QAMEX DCARTE BLANOC □ DINERS CLUB Boddmgton 25 chapters. 227 trie technical.!»» of building A flying model aircraft includes p g s . 210 illustrations Topes S’ ------E . p ------ranging from basic aerody­ aerodynamics powe* sources namics to electric power & construction A flight tech­ Cardholder's Name _ ducted fan modets Emphasis niques 11 chapters. 294 pgs is on construction techniques Over 200 drawings A photos Si 8 the details ol proper installa­ Hardbound 7" « 9 Address _ tions 8' * 8' softbound 211280 $22.95 21108B $11.95 C ity ------MB3J Visit our office A warehouse at 729 Prospect A ve. Osceola. Wi MARCH 1985 69 winter this way! Jack is so enthusiastic about lake flying that he extends an invita­ tion to any electric fliers that have water planes to come and fly with him in his front yard! He offers a canoe for retrieval, and power for the chargers, in return for BYOCAD, which stands for bring your own coffee and donuts. He prefers his do­ nuts glazed and honey dipped, and black coffee please! Contact Jack Pignolo, 1-617-429-4215, Holliston, MA. Jack, if I wasn't on the other ocean, I would be on your doorstep right now! Maybe someday I w ill get a chance to see what that other coast looks like, and go flying with you! Jack's comment about brushes and water is quite true, in fact, car racers dip running motors into water to instantly seat the brushes. I have not had any brush problems with my Astro 05, 020, 15, 25, and Astro cobalt motors, but I do not have ventilation of any kind, so the plane is water tight. Water just does not get in, un­ less I dunk the plane (flip it over). This is why I prefer slower-revving motors, it is easier to get away with totally enclosing them, because they do not heat up. I have had brush problems with the Leisure LT 50; some water may have gotten into the motor somehow. My feeling is that for seaplanes, the best bet is a cool-running motor and sealed motor enclosures. Then you can ROW all you want! Find a prop that w ill let the motor run at least four minutes on the ground (static), and it will run cool in the air. And yet more seaplanes! The photo shows the cover of my book on building and flying electric model aircraft, and it features one of my float planes flying over ί UACKEY'S TRADE WIND KITE C0?\ Lake Washington (along with an inset of P.0 Box 2698, Mission Viejo, CA 92690 yours truly charging it). There is one Modelers like the TRADE WIND for practice minor error that I am aware of in the book, Light or strong winds, stable, maneuverable in the chapter on power packages, I have Complete kit includes Ripstop Nylon sail. Kev­ lar* non-stretch lines, handle/reel a drawing of a motor brake circuit. The Fokker Dr 1 screenprinted on R ed...... $26.95 circuit is all right, the statement that you Sopwith Camel printed on Y ellow ...... $26.95 cannot use a charge jack is wrong. You Red, Yellow, Blue w /o printing, ea...... $24 95 3-Pac o f above for tandem (ly in g ...... $59.95 can install it on the battery side of the Dealer Inquiry welcome CA re tid rn ti add lex switch. Anyhow, there is a section on sea­ Order yours today for practice or fun planes, read it and enjoy! MONOCOUPE 90A The annual Astro Flight all-electric con­ QUARTER SCALE test is coming up; it has just about every­ Q UADRA-4 CYCLE thing you could want to see or do with SEND $2.00 FOR COMPLETE electrics. This is definitely the place to be CATALOG OF FINE KITS if you want to see the state of the art! LIAM rUCJSlO· AEROBATICS PRACTICE COMBAT Seven-cell pylon racing, seven-cell sail­ . WITHOUT PEAR OF CRAS1C1IG wmioirr rbbotumhg Ikon N‘WST plane, and F3E will be on Saturday, Febru­ P O. Box 566 Auburn, WA 98071 At present, I have little hope of any (206)941-8248 ary 9, at Estancia High School, Costa general sweeping muffler rule being ap­ Mesa (near the Model Builder office). proved. While I agree that progress needs Registration is at 8, flying at 9 till 3. The to be made in this area, I also feel that it next day, Feb. 10, will be at Mile Square, E le ctric...... Continued from page 41 must be done in a transitional manner. and w ill feature Old Timer, scale, and This means a longer period of time in aerobatics. The free flight w ill be the next which to implement modifications. I be­ ings are so pretty that they bring tears of weekend, Sunday, February 17, at Mile lieve that more work needs to be done by joy to the eyes. It has had 200 plus flights, Square, so that those who fly both R/C not only the industry and the AMA, but and uses an Astro cobalt 05 turning an and free flight can do both. It's going to be also by the modeler in this area. The frus­ 8x4 direct drive on seven 1.2 Ah Sanyos. fun. See you there! trating thing about it all is that for every The floats are the RCM Old Timer floats, Speaking of contests, there is a possibili­ flying site or contest field that has a real #598. The Leisure Playboy has had over ty that there will be an FAI F3E World concern about the impact the noise has 500 flights, and uses an Astro cobalt 15 Championships. Joe Beshar, who is chair­ on its neighbors, there is another field geared, with twelve 1.2 Ah Sanyos, with man of the electric team selection com­ where the noise is of no concern because on-off by servo. Jack plans on using a Jo- mittee, would like to hear from you if you of remote location. Your input is solicited. mar throttle in the future. are interested in being on the team. Write In the winter, Jack leaves on the floats, a note to: Joe Beshar, Chairman, Electro Fly Safely! Mike Hazel, 1073 Winde- and lands on the frozen lake using them Team Selection Committee, 198 Merrit mere Dr. NW, Salem, Oregon 97304. · as skis. He's had over 200 flights in the Drive, Oradell, NJ 07649. By the way, the

70 MODEL BUILDER GET STARTED RIGHT- FLY KADET An economical trainer size that saves money in model, Club instructors and hobby engine and fuel costs. A chip off the old block with the same dependable performance that has made the Kadet family dealers know from experience name famous all over the world. that a Kadet is the best radio control trainer. Student pilots Designed by; need time to think and a chance Cl a u d e McCu l l o u g h to start developing some automatic reactions during those first few critical hours of practice. A too fast, jumpy, sym­ metrical winged trainer is not KADET JUNIOR the answer. Ask the thousands who have successfully soloed on LENGTH; 39" a sturdy, docile Kadet with a flat bottomed wing. They’ll tell you $50.95 that learning to fly “the Sig way" is the only way to go!

KIT RC-51 ALL KADET KITS HAVE THE FOLLOWING FEATURES: Full size plans, photo illustrated construction booklet, die cut balsa and plywood parts, speedy method of construct­ ing the fuselage by gluing the parts directly to the printed wood sides, aluminum motor mounts to fit any engine in Designed by stallation. formed main landing gear, coil spring nose c l a u d e McCu l l o u g h gear, nylon nose gear steering arm and bracket, nylon control horns, molded control surface hinges. Tuf-Steel This is the original model that started it all, intended for use RC links and rods, hardware package of bolts, blind nuts, with 3 radio channels and rudder control. Many thousands screws, etc. (The Kadet Mark I and Mark II have in addi­ of fliers have successfully soloed an “ Old Faithful” tion an injection molded plastic cowl.)

The latest refinement of the ideal trainer design in an FIRST - AND STILL BEST aileron control version with all-new construction It's selling "Learn to Fly the Sig Way" was the so fast, our production facilities are strained to the limit try- ing to keep up! AD pne·* *ut>»*ct to chjnf· wittioul notic· first of the step-by-step training pro­ grams currently being advertised. We appreciate the compliment from those who have followed our lead — it proves we were on the right track. The biggest advantage is that our trainers are the only ones designed from the start to fit together in a KIT RC-49 carefully graduated progression from one level of flying skill to the next. KADET MARK II HERE ARE THE OTHER STEPS IN THE "LEARN TO FLY RC THE SIG WAY” PROGRAM STEP 2 - INTERMEDIATE - FASTER SHOULDER W ING DESIGNS STEP 3 - ADVANCED AEROBATICS

STEP 4- EXPERT KAVAUER KOMANDER K,TRC32 After practice flying one or more of the three Kadet designs shown above as a Step 1 basic trainer, the RC student pilot will be ready to graduate to one of the νΠ Μ Ε Τ KIT RC-29-1 KIT RC 29-2 Step 2 intermediate models shown here and then move on to Steps 3 and 4 f t U m t l $75.95 $76.95 Available at your local SIG Dealer or call toll free for orders only 800-247-5008. For mail orders under $10 add $1.50 pstg. Over $10 ppd. Catalog 47 - $3.00 SIG MANUFACTURING CO., INC...... Montezuma, IA 50171

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 71 BUILDS ROUND ENGINES! For information send $3 00 to TECHNOPOWER II Inc. 610 North Street. Chagrin Falls, OH 44022

8. Dan Rome, M.R.P. Sport Vee, 13 laps· FREEH! ^tug Sparks . Continued from page 37 Howler was one of the myriad of engines 1985 Catalog of tools for Ψ S17.98 1/2A SPACER that made their appearance in 1946 and the Hobbyist 1947 in answer to the tremendous de­ NOSTALGIA mand of orders and requests for the latest • Miniature lathes / GAS MODEL • Milling/Drilling FROM THE 50's hot engine. Like so many of the manu­ machines facturers, this engine failed to attract the • Jig & circular competitive modelers, hence, another saws MANUFACTURERS OF company had to fold during early 1948. • Styrofoam f a ^ \ RUBBER.GLIDER.AND 40 YEARS AGO I WAS... cutter ( GAS FREE FLIGHT KITS Received the most interesting packages V N y > ] DISTRIBUTOR AND from Mickey DeAngelis, one containing • and m0re! 6 U/ 44S-9621 DEALER INQUIRIES newspaper clippings and photos, the INVITED. '"tod»’'1 hobby products co. P. 0. BOX 5996 other envelope containing the much send st amp sought after Kloud Queen and Miss Tren­ Dept MB P.0. Box 07846 Columbus OH 43207 LAKE WORTH for c a ta lo g FL. 334 61 ton plans. best way to find out what F3E is all about Photo No. 11 shows Mickey in those I believe it will be only a few years until is to go to the Astro contest in February! "good old days" in 1939 with his "Kloud we see model electric racing boats capa­ There is some excellent competition there, Queen," having registered 160 flights as of ble of speeds upwards of thirty miles-per- and the very latest state of the art in F3E May 6, 1939. Needless to say, this model hour. With those types of speeds, electric is used. * is an antique follow-on to the Kloud King. racing will attract a lot more attention. At Just to show you the spectacular per­ this time we are laying the foundation for formance of this model, Photo No. 12 R/C Boats . . . Continued from page 47 what could become a most exciting form shows the model climbing at a very steep of model boat racing. Just think, now is angle without stalling. Once we get the there was no hull damage suffered by any the time to get in on the ground floor of plan squared away on this jewel, there of the boats. Had gas powered boats been this developing new sport. should be some requests for it. involved in this amount of racing action, RACE RESULTS Getting back to the clippings on the Le­ there would have been considerable JUNIOR NOVICE CLASS high County WPA Aeronautical Society damage inflicted. Electric boat racing 1. Adam Grim, M.R.P. Sport Vee, 14 laps meet at the Allentown-Bethlehem airport, seems to allow a much “freer" style of 2. Denise Dunlap, M.R.P. Pantera, 13 the article states this was the largest con­ driving. I'm not sure if this is good or bad. laps test for this type, attracting over 175 con­ You can do some things with an electric 3. Robbie Morgan, M.R.P. Sport Vee, testants with 217 entries. This crowd boat that would be foolish to attempt with 5-1/4 laps attending the meet was estimated at over a gas boat. EXPERIENCED CLASS 3000. After my first "official" electric boat 1. Scott Hogman, M.R.P. Sport Vee, The most interesting item was the race, I'm looking forward to organizing 27-1/4 laps description of six automobiles full of com­ and promoting more. Without doubt, 2. Gary Keyes, M.R.P. Sport Vee, 25-1/2 petitors arriving from Trenton and Phila­ there are many positive aspects about laps delphia. As luck would have it, DeAngelis electric boat racing. There are also some 3. Bob Welch, M.R.P. Sport Vee, 24 laps provided Photo No. 13 showing the boys problems related to the fact that it is a new 4. Jim Welch, M.R.P. Sport Vee, 21 laps and their tents after camping Saturday activity and there isn't a whole lot of infor­ 5. Paul Dunlap, Dunlap Vee, 16 laps night. The newspaper reported the group mation available about setting up a com­ 6. Tony Bellezzi, M.R.P. Sport Vee, 13-1/2 formed two circles with their cars, much petitive electric boat. This lack of laps like the early pioneers did with their co­ information will become less of a problem 7. Jeno Bellezzi, M.R.P. Pantera, 13-1/2 vered wagons. Those who did bring tents, as more people become involved. laps slept under the stars.

72 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER ter Christmas Specials on JR Unlimited VIII Radio Systems Start the Slew Year O ff w ith the Top O f J/H, / j /H , l nlim ited Series R adio Systems at the Low est Prices Tver. Super Special Offer, Lim ited Q uantity. The JR Unlimited Series radio systems are truly the Unlimited VIII Pattern Rolls Royce of radio control equipment. Over w/(4) SOI standard servos the years, it has won every major R C flying event. If \<>u thought that uni were tin- v only $ 269.95 able to afford the best, cheek these JE k prices! Now. for a limited lime and Ju k ^ Unlimited VIII quantity sou can get I nlimited MA control tit an imusualls low MA Rk Scale price Pun sou better litirrs MA Dk w/(4) 501 standard sc s Cl Ml >n ■ , tiic IK t nlimited MA ftk only $ 279. lA I \ Unlimited VIII Helicopter Cheek the leaitiresol each f f l 3 w / ( 4 1 501 I ) only $ 289. Order Toll Free I Ml I It i a.Iii is I an Iv .irUeii-tl Vtf (8(10)782-0022 l^ ^ B ; H I Customer Si rs ice and Information 7021 7324

m m m s m t

Also Available In With 401 or 4001 Servos Variable Pitch Prop $399.95 For $399.95 J8C-4SM SCALE J8C-4SF PATTERN J8C-4SH HELICOPTER 8 CHANNEL SYSTEM: Plug-in R.F. 8 CHANNEL SYSTEM: Plug-in R.F. 8 CHANNEL HELICOPTER SYSTEM: Module, Ball Bearing Supported Module, Ball Bearing Supported Plug-in R.F. Module. Ball Bearing Gimbals. “ Double Trim" Ratcheted Gimbals, “ Double Trim" Ratcheted Supported Gimbals, Servo Reversing Trims, Servo Reversing Switches, Trims, Servo Reversing Switches. Switches, “ Double Trim" Ratcheted Adjustable Stick Length, Carrying Adjustable Stick Length, Carrying Trims. D.S.C. (Direct Servo Controller) Handle, Pilot Light, D.S.C. (Direct Servo Handle, Pilot Light. D.S.C. (Direct Servo allows operation of all 8 channels without Controller) allows operation of all 8 Controller) allows operation of all 8 turning on transmitter. Carrying Handle. channels without turning on transmitter. channels without turning on transmitter. Pilot Light. Adjustable Length Sticks, Available in Mode II on 53 MHz FM and Available on all 72 MHz AM/FM and 53 Available in Mode I and Mode II 72 MHz AM/FM Frequencies. MHz FM Frequencies. Configurations, (4) 801 Servos. Available Features: Aileron/Rudder Mixer, Features: Servo End Point Adjustments, on all 72 MHz AM/FM and 53 MHz FM Frequencies. Elevator/Flap Mixer, Elevon Mixer, Dual Elevator/Flap Mixer, Flap/Spoiler Mixer, Features: ATS System (Tail Rotor Rate Elevator. Dual Rate Aileron, Switch Aileron/Flap Mixer, Elevon Mixer, Triple Compensation), Hover Point Adjustment. Activated Preset Flaps. Multi Engine Rate Aileron Control, Dual Rate Elevator Pitch Curve Adjustments (Collective Function. Control, Dual Rate Rudder Control Channel). Dual Rate Aileron and Elevator. (Selectable or Automatic), Two (2) Inside Dual Rate Rudder with End Point Snap Roll Buttons, Outside Snap Roll Adjustments, Throttle Hold Function. Hi Button, Throttle Push Button Control. Idle Function. Inverted Flight Switch.

Circus Hobbies Inc., 3132 S. Highland Dr., Las Vegas, NV 89109 Send $1.50 for Product Information Package

Offer Expires February 28, 1985 All Prices Subject to Chunjge Without Notice. I united to Quantity on Hand. THE WINNING COMBINATION X-CEL WITH SUPER JET OR REGULAR JET!

Using Super Jet or Regular Jet w ith X-CEL in the new aerosol can has done away with much pinning, taping and even praying that parts are permanently joined. You’ll find even less time gluing and more time flying. Great for your unexpected field repairs. Whether you add a fillet or fill a gap always keep the combination on tap. SUPER JET X-CEL REGULAR JET 1/4 oz. (No. 383) $1.99 3 oz. (No. 389) 1/4 oz. (No. 385) $1.99 1/2 oz. (No. 384) $2.99 $3.99 1/2 oz. (No. 386) $2.99 1 oz. (No. 382) $4.99 1 oz. (No. 381) $4.99 2 oz. No. 388) $9.99 2 oz. (No. 387) $9.99 For best service, see your dealer for items you went. H not available, write direct: add $1.00 per item ($2.00 outside U.S.) Minimum order S2. CARL GOLDBERG MODELS, INC.

4736 West Chicago Avenue · Chicago, Illinois 60651

The newspaper further reported that time you saw a medical facility on the ing notified by postcard as they are ready, despite the large number of entries, the field? according to Dick Dwyer. If you are not meet went off very smoothly, employing As Mickey DeAngelis pointed out, those presently on the list, there may be a few six specially constructed lanes that kept were great days, as the meet was well left (only a guess). Price, including all ig­ everyone moving in regular order and stocked with trophies, prizes, and mer­ nition parts and wooden mount, shipped eliminated confusion. Spectators were chandise donated by the local merchants. First Class mail is $199.95. C.O.D. deliver­ quite sympathetic with those who cracked Best part was that the airport officials fully ies are slightly higher at $202.50. Remem­ up their models, twelve in all. They did cooperated by closing the field for two full ber, only fifty are being produced! appreciate the work that went into those days. How about that? More good news! Although it has been beautiful six and seven foot models requir­ REPLICA ENGINES a long time coming, Karl and Dick an­ ing many hours of painstaking work. For those who have been wondering nounce the following engines will be Results for the day showed that at least what happened to Replica Engines, things produced. (Prices quoted are tentative) one of the Trenton boys, Steve Vosa, won are really popping now that Karl has fully Baby Cyclone: Model D only. There will second with a Miss Trenton in the Dura­ recovered from his triple by-pass heart be no production limit. Engines will be tion Event that was won by Robert Gable, operation. This, plus his partner, Dick manufactured to demand. Price: of Reading (flying a Long type cabin, what Dwyer, being available for full time work, $194.95 else?) How about these results: has made a difference. Batzloff Triump 60: Only fifty (50) will be LIMITED ENGINE RUN The boys have finally gotten production produced. Write immediately to get on 1. Joe Horwath (Philadelphia) 12:00 of the 1937 Finned Head Brat engine start­ the list. Price $249.95 2. Bob Gable (Reading) 2:24 ed. At the time of this writer's visit to Bunch Warrior: At present, only 100 are 3. Martin Rohner (Staten Island) 2:17 Replica Engines, Karl was running the scheduled. Again, if you want one, get DURATION OF FLIGHT columnist's Brat (#008). Rather surprising on the list. Price $199.95. 1. Robert Gable (Reading) was the ease with which the engine start­ NOTE: (1) All engines will be test run! This 2. Steve Vosa (Trenton) ed, but unfortunately, Karl had picked out means you can use the engine if you so 3. Carmen Costello (Scranton) a "tight" one for Pond, hence, it will re­ desire. Everything that was manufac­ BEST CONSTRUCTION quire considerable break-in. tured in the original engine will be 1. Joe Kabrak Although it was apparent the engine faithfully reproduced. 2. Walter Eggert was quite stiff, it registered 7000 rpm, not (2) At present, an unspecified spark plug 3. Willis Hartley sounding at all like it was broken in. Esti­ w ill be provided with each motor, and Concluding, the Allentown Morning mates vary, but it appears the engine will a new coil and condenser plus a wood Call, in its report on Monday, August 2, run in the 9000 rpm range. All running mount, all as required to run the en­ 1937, stated the heat did take its toll in tests were conducted using an 8 x 5 pro­ gine, w ill also be included. heat shock. The meet was so well organ­ peller, something a little higher in pitch (3) Accessories: ized, that all injuries, heat prostration, than this writer would care to use: an 8 x A. Coils and condensers w ill be sold etc., were treated by the American Red 4 would seem more reasonable. separately. Cross First Aid Corp. on hand just for Those who have ordered the new series B. Super Cyclone and Anderson Spit­ these emergencies. When was the last of 1937 Finned Head Brat engines are be­ fire parts are no longer available. Write

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

THE TEAM DOES IT IN THE DIRT. oil-filled racing shocks. These custom Race the car that beat the Associated shocks use machined alloy cylinders and custom racing drill blank shafts for silky smooth action imports in the toughest kind of shocks off-road competition. Rugged, yet light, the suspension gives The All-American Associated Competition you all the adjustability of full size, full race RC10 took home the gold in modular buggies The A-arm/Ball joint design allows both the ROAR and ORRCA precise camber, caster, ride height and National Championships spring rate tuning. Even anti-roll bars Our RC10 turned back the and a VariLok dif are included. foreign car invasion with the Exceptional ground clearance and same racecar technology that low center of gravity also contribute has kept Team Associated on to the superb balance and perfor­ top of the RC car racing world mance of the RC 10 over all types for over 15 years. of terrain. T6alrcrott A RACE CAR. NOT A TOY. aluminum GET THE JUMP ON THE COMPETITION. Sure, you've heard that before. monocogue tub Go RC off-road racing with the But Team Associated designs leaders The National Champion and engineers only model RACE cars Front RC 10 Is available now and legal for The new RC 10 features fully adjustable, four Fully a ROAR and ORRCA nationally sanc­ 4 wheel skid plate wheel independent suspension, an aluminum independent tioned competition. alloy monocoque tub and race-proven hardware suspension Complete RC10 kits, replacement throughout. parts and spares are readily available through And the RC10 doesn't need expensive model car racing's most extensive dealer accessories and modificdtions to handle the network. roughest tracks The strength and durability is Take the challenge and build yourself a winner standard equipment Team Associated's RC10. Sealed gearbox VarILok RACE-WINNING ENGINEERING. For maximum traction ^ differential Smooth undercarriage the RC10 suspension maximum ground clearance is damped by long throw. Θ Model cars for Real rocers. Full race rear suspension includes bullet proof holt shall and u-joints with tapered and Associated Electrics keyed modular wheels. Quick release knock 1928 Eos! Edinget oft design tor last pit work and tuning. Santo Ana. CA 92705 (714) 547-4986

©1984 Associated Electrics 1 staged, the majority of NCFFC clubs feel­ CANNON MINI R /C & SPORT ENGINES ing that three events take too much time R/C SYSTEMS as it is. However, a full schedule for one L______/ U/CONTROL ENGINES PROVIDE HIGH RPM'S FOR TOP day will consist of the Limited Engine PERFORMANCE; THROTTLED R/C ENGINES COMBINE DEPENDABLE IDLE WITH SMOOTH Events, Class A, Class B, Class C, and the TRANSITION TO CONSISTENT HIGH SPEEDS. ALL START EASILY; MUFFLERS ARE STD. Antique Event. 03 U/C 0 3 R/c .061 R/C A The flying schedule that includes old timer R/C events has been formulated as follows: Feb. 3 — Stockton Winter Bash Mar. 3 - NCFFC (O.C.D. Host) April 14 — NCFFC (Sierra Host) May 5 - NCFFC (Stockton Host) July 14 — Stockton Summer Bash Sept. 15 - NCFFC (Sierra Host) Oct. 6 — NCFFC (Stockton Host) Nov. 10 - NCFFC (O.C.D. Host) (Since this article was turned in, several GLOW conflicts have been discovered. Watch for revised schedule next month, wen) All meets will be held at the Waegell FOR CARS & BOATS I V > GLOW PLUGS Ranch located off Hwy. 16 on Sunrise I 14,000-18,000 RPM ’ $ NOTINCLUDED. 4500 Road. This field can also be reached from Hwy. 50 by taking Sunrise Road south for I cash discount p r ic e s shown, v is a o r mastercard 5% I l/ I C A Higher. In Calif, add Sales Tax. Shipping $3.00. six miles. Starting times are 8:00 or there­ I 20% deposit req'd on COD's. Brochure $1.00 in U.S., abouts, with the meets generally closing I $2.00 Foreign. Std. Dealer and D istributor Discounts. at 3 p.m. If you need practice, here is a ^ 23400-2 9 Saticoy Street North Hollywood, Calif. 91605 (f great way to get some contest time in! JIMMY ALLEN BLUEBIRD GUMBO) Based on the terrific amount of interest generated by the Jimmy Allen Event offered at the Bong Field SAM Champion­ ships, Wisconsin, and the popularity of the J.A. Bluebird, according to Larry Ladd, a scaled version (1.5 times) of the Bluebird w ill be offered by Hobby Horn. Larry sends in Photo No. 14 to show just what is proposed in the way of the Jimmy Allen Bluebird. As can be seen, the model Earl Stahl's beautiful is much larger (57 in. wingspan) and is “ REARWIN SPEEDSTER” powered with an Enya 40 R/C. Larry ad­ 28" Wingspan — Rubber Powered Kit #108 $ 1 4 . 9 5 mits this is too much power, but says it Phone: (703> 273-9593 sounds great with the engine speed just Flyline offers 22 beautiful Scale Designs . above idle! 50c brings our Catalog Brochure At present, plans for production of the FLYLINE MODELS, INC. kit is still uncertain. If you are interested P.O. Box 2136. Foirlox. Virglnio 22031 U.S.A. in this item, the best idea is to let Bob Sliff 3 FOR $5.95 know about it. Bob can be reached at Hobby Horn, 15173 Moran St., (B), West­ Coming soon to a hobby store near you! one of the leading and most progressive minster, Ca. 92684, phone: (714) 893-8311 Send Check or Money Order To: free flight federations of the West Coast, at during office hours. Ρ.Ο. Box 261226 their Annual Business Meeting, approved San Diego, CA 92126 the staging of old timer R/C events in con­ READERS WRITE junction with their regularly scheduled Seeing that we published a photo of the Κα£$φ(Η κ<μ. meets. Cleveland Boeing 40 Mailplane, R.B. This is the most astonishing innovation McKenna, 1620 Artesia Blvd., Redondo / \ Dealer inquires invited. to date (except for the abortive effort to es­ Beach, Ca. 90278, sent a set of three pho­ tablish Old Timer events at free flight con­ tos of his Cleveland Curtiss F11c-2 to Tom Morrison, Super Cyclone En­ tests). The ramifications of this move are Goshawk. We reluctantly passed up the gines, P.O. Box 10658, Phoenix, Arizo­ two-fold. The first should hopefully bring excellent color shot and present Photo na. He has a complete listing of parts more modelers to the field. Based on two No. 15 of the model. available. to three different type contests being held For the benefit of readers who should (4) Hetherington 23 (As featured in simultaneously at Condor Field, Taft, as an like to identify Bruce Norman, of Ft. Model Builder, March 1979) sometimes example, there is bound to be an inter­ Worth, we are using one of Art Schroe- called the "Sheetmetal Special," is change of views with many modelers der's shots taken at the Rancho San Rafael available from Replica Engines. This switching back and forth between R/C and Recreational Area, Reno, Nevada, during project includes all tooling for parts. F/F. the NATS Old Timer R/C events. Photo Best offer takes! In an attempt to attract the present Old No. 16 illustrates how Bruce has expand­ All the foregoing is only the sketchiest Timer R/C flyers, Society of Antique ed his attitude regarding radio control outline of what is going on. For more de­ Modelers (SAM) rules will be used. This models. Gone is that slender figure der­ tails write: Replica Engines, 1837 Flood will automatically preclude the use of any ived from chasing free flight...haw! We Drive, San jose, Ca. 95124. You will get an model design after Dec. 31, 1942. Perhaps present Bruce in a three-quarter frontal answer, honest! later, as interest increases, the R/C portion view with his highly successful Lanzo N.C.F.F.C. UPDATE of flying may be extended to include the Bomber, Ohlsson 60 (front rotor type) po­ Bill Bowen reports that the Northern ever increasingly popular Nostalgia Event. wered. Turns out to be an excellent com­ California Free Flight Council (NCFFC), At present, no Texaco Events will be bination. 76 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER HOW TO GET A REAL CHARGE OUT OF YOUR NKADS.

The Ultimate Charger. Safe, Simple NiCad Charging . . . Automatically. When it comes to getting the most from RC car, boat and Each Leisure Auto Charger buggy NiCads, the Leisure 109 offers hassle-free, efficient and Digital is in a class by itself. effective NiCad charging. We built the sophisticated No tangled cords. No bat­ 109 with the features and func­ tery temperature to check. No tions you need for peak perform­ waiting and wondering. ance and extended battery life. Just plug in your batteries, With the 109's built-in digi­ set the timer and relax. Each tal LCD display and ampmeter, Leisure charger constantly you can select and set any con­ checks battery capacity and stant current charge rate from 0 to 4 Leisure 109 Digital. I >esii

FRESH POWER SUPPLIES! New Leisure GE and Sanyo 6 cell /sub C packs. Wired and ready to install in your plane, boat, buggy or car. the initial crash. Worth mentioning is the fact that hard work finally pays off. Dennis Parker won DGA DESIGNS Full Body Pilot Kit three places in three events, winning two firsts with his Zipper. The writer does note a crossover is allowed from old timer • Lightest Pilot (1934-42) to Vintage (1943-52). In the available Twelve page-Fully Illustrated U.S.A. contests, you are required to state • Lifelike vinyl la­ w ith complete details o n ... which event you have selected and you tex rubber parts • MUFFLERS are stuck with it! • Easy to assemble • ENGINE MOUNTS and finish On a free flight kick, Photo No. 18 is a • ENGINE TESTING EQUIP. • Build as either a shot of Paul Straney, well known Victorian barnstormer or •SCALE ACCESSORIES free flighted taken at the Richmond Na­ sportsman pilot • SMOKE KITS. ETC. tionals. However, he is still using his good • Kit contains pilot Send $1.00 for Catalog flying "Jimp," a local design that was head, hands, TATONE PRODUCTS CORP. popular with the VFFS boys. boots, helmet, 1209 Geneva Ave. San Francisco. Ca.94112 Roy Robertson, Contest Manager, says cap, goggles, full 415 334-7189 after such a successful beginning in Vic­ templates and toria, he is now working on a big inter­ easy instructions state meet with New South Wales. This •F u lly positionable & moveable should develop at the big SAM Seminar •Som e simple sewing required scheduled for January. We didn't get any times on the results Weight Price but let's take a look at what the Aussies 1/6 Scale 2oz.* $ 7.95 are flying in competition: R/C OLD TIMER 1/4 Scale 4oz.* $ 9.95 90" wingspan, 1,200 sq. in. area, .90 or 1/3 Scale 6oz.* $16.95 larger engines. Plans, $18.50 1. Winston Crowther — (Miss America) •Weight may vary depending on O th e r plans: 2. Derek Buckmaster — (1937 Bowden) material used in construction. BEECHCRAFT BARON MODEL 50: 2 V Scale-85 3. Warwick Bates — (Red Zephyr) wingspan-1000 sq in (3) 3 x6 sheets Si5 00 Beechcraft Fm Insignia $2 00 R/C ANTIQUE PRECISION BEECHCRAFT BONANZA A36: 2H Scale-86 1. Winston Crowther — (Miss America) DGA DESIGNS wingspan-1300 sq m (3) 3'x6V7 sheets S i7 50 2. Warwick Bates — (1937 Bowden) Bust Pilot Kit Add $2.00 postage inside U.S. & Canada 3. Graham MacDonald — (Miss America) Include $2.00 for plan rolled in tube Weight Price Overseas orders add $10.00 postage R/C BEAUTY (CONCORS D'ELEGANCE) Alabama residents add 6% sales tax 1. David Reynolds — (Powerhouse) 1 /6 Scale .75 oz. 5.95 F/F O/T POWER 114 Scale 1.5 oz. 7.95 BUD CADDELL 1/3 Scale 2.25 oz. $14.95 1525 Badham Dr.. Dept M. Birmingham. AL 35216 1. Dennis Parker — (Zipper) 205 822-4312 2. C. Wyer — (Thermal Thumber) d e a l e r in q u ir ie s INVITED______F/F VINTAGE POWER • Lightest bust pilot available 1. Dennis Parker — (Zipper) • Lifelike vinyl latex rubber parts PEANUT SCALE MODELS Kit. $5.95 2. R. Allbun — (Alert) •Easy to assemble and finish / ZERO MILES M-18 3. Paul Straney — Gimp) • Build as either a barnstormer ·/ PIETENPOL DRUINE O/T RUBBER or a sportsman pilot ^ PIPER CUB COUGAR ¥ ANDRESON GIPSY MOTH 1. Peter Ellis — (Korda) •Kit contains pilot head, helmet, LACEY M-10 GANAGOBIE cap, goggles, jacket, instructions. 2. Dennis Parker — (Lanzo Stick) Rubber Powered SPORT MODELS 3. G. Wyer — (Korda) BABY ACE $6.49 To top off a gorgeous day, only one See your dealer or order direct. ONE NITE 28 $6.95 Add $1.00 shipping for direct orders. ONE NITE 16 $5.95 crash was noted; Steve Watson's Red Send $1.00 for current catalog. PRAIRIE BIRD · STHINGLESS $4.95 Zephyr smashing on takeoff. Don't know if KIT $5 95 $1 95 Dealers inquiries invited PECK R.O.G it was "switchitis" or just a high speed stall. Tough act! NYS Residents add 7 percent sales tax. BLI Af PS CONTROLLED Send Check or M.O.. Allow 3 weeks for 11 and 13 FOOT LONG.KITS OR THE WRAPUP check to clear. Sorry-No C.O.D.'s. READY TO FLY N O W IN THREE COLORS GRAY. ORANGE and There is nothing like getting an answer YELLOW LO W PRICES to a letter sent out Feb. 8, 1973. Plenny D?A DESIGNS NEW! CATALOG No. 25 - $1.50 Bates, 2505 White Eagle Trail, S.E., Cedar 135 East M ain St., Phelps. NY 14532 Peck-Polymers Rapids, iowa, 52403, who figures better Phone 1-315-548-3779 BOX 2498 MB LA MESA. CA 92041 . late than never, finally got around to an­ swering the columnist's letter outlining a SAM ABROAD nice writeup from Dennis Parker, news­ few do's and don't's on models. Plenny SAM in Australia has taken off like a letter editor for SAM Australia, describing took the time to write some tips as he had rocket. Barely three years from start, the the latest O/T activity in Victoria, called discovered them on adjusting a Custom 2nd SAM Championship is planned at the "SAM Southern Regional," held on 17 Privateer. We feel some of this is worth Canowinda, N.S.W. Accommodations in November. passing on to other would-be hydro fans. this town were primarily for balloonists, as Dennis reports the weather was perfect First of all, Plenny states the Privateer is this area is considered the calmest in all at Laverton AFB. However, because the a good flying seaplane, his is now in its of Australia. base was still on an operational basis, the third owner's hands. Bates paid attention The Balloonary (headquarters normally free flight boys had to fly from an adjoin­ to strength and weight (especially the lat­ for the balloonists) has been completely ing field. ter) when he built the wing using a D- booked up by the free flighters, while the Although Dennis did not include pho­ tube. The fuselage was also built light, but radio people have taken all the motel and tos, we still have quite a few photos of the all outlines have been faithfully hotel reservations. The townspeople are boys still using the same models. An ex­ reproduced. probably wondering what hit them, as this cellent example of this is Photo No. 17, Plenny says when he builds No. 2 Priva­ promises to be the largest SAM Champ­ showing the Beauty Award winner, David teer, he would do the following: ionship in Australia to date. Reynolds, with a Powerhouse. The one he (1) Reduce the dihedral. This would help Along with the views expressed by Gor­ won with was Enya 60 powered, the immeasurably in crosswind handling. You don Burford, this columnist received a Anderson Spitfire having been removed in only need large dihedral for a free flight

78 MODEL BUILDER version. (2) Reduce the incidence of the wing and tail and particularly the incidence difference between the wing and tail. With a large amount of incidence in the wing, the model is slow to get up to flying speed. As soon as stall speed is obtained, the model lifts off in an almost ready-to- stall attitude. (3) Setting the wing at a very small inci­ dence angle allows the model to easily ex­ ceed stall speed before you rotate the hull by use of the elevators. No question about it, you have better control on takeoff. 2401 We know there is quite a bit of interest out there in old and antique seaplane fly­ ing, as can be noted by SAM 21 activity and Lake Elsinore fly-ins. Incidentally, SAM 21 took over the old South Bay Sea­ plane Society's activities. We do hope the foregoing is of practical help for all long- planning hull seaplanes under radio con­ trol. Any other ideas are welcome. We would like to share your experience. ·

Counter.... Continued from page 10

732-0022. All that's required to apply the covering is a hair dryer or heat gun. Main rotor covering is $1.99, in clear, red, black, yellow, transparent blue, transparent yel­ low, and white. Tail rotor covering is $1.49, and is available in red and white. There is enough material in one package to cover CAN BE USED both blades of even the larger helicopters. ★ ★ ★ WITH GASOLINE, The "Kwik-Klip II" is a new locking glo- plug connector for both standard and four­ GLO-FUEL, OR DIESEL FUELS cycle glo-plugs, by Du-Bro Products, Inc., 480 Bonner Rd., Wauconda, IL 60084. CAP FITS OVER - Operation is similar to the hypodermic MACHINED SMOOTH NECK OF needle syringe...thumb on top, fingers TANK PREVENTS TANK FROM SPLITTING FORMS A under the flange, then press to clip on, POSITIVE LEAKPROOF SEAL press to release. It w ill not loosen, rotate, or fall off, even during heavy engine vibra­ tion. As Du-Bro says, "One Bite on Tite." ★ ★ ★ Called the "Glitch Buster/' a new elec­ FRONT LIP tronic device by Jomar Products, 2028 PROTECTS FUEL LINES FROM EXTRA LONG CONNECTION Knightsbridge Dr., Cincinnati, OH 45244, BEING CRIMPED TUBE ON CLUNK FUEL PICK-UP 513-474-0985, features "six channels of OP­ TICALLY ISOLATED signal conditioning NO. DESCRIPTION SIZE which completely eliminates any electrical connection between the receiver and the 402 2 oz. SQ. FUEL TANK 1V,/’ H x l'3/,β" W x 23//' Lg. 404 4 oz. SQ. FUEL TANK 1V/* * H x 2V,6" W x 33//' Lg aircraft wiring system." Two separate battery 406 6 oz. SQ FUEL TANK 17e" H x 23/16" W x 3 7 /' Lg packs are used...one for the receiver and 408 8 oz. SQ. FUEL TANK 1 'V,6" H x 27,/' W x 47/' Lg a servo pack, which can be four, five, or 410 10 oz. SQ. FUEL TANK 2’//' H x 27,/' W x 47/' Lg even six cells. The optical isolation tech­ 412 12 oz. SQ. FUEL TANK 2V„" H x 27,/' W x 53//' Lg nique has been used extensively by the 414 14 oz. SQ. FUEL TANK 23//' H x 2 " /, / ' W x 53//' Lg. 416 16 oz. SQ. FUEL TANK 23//' H x 2»/,/· W x 57/' Lg military for their target drones with great 424 24 oz. SQ FUEL TANK 2V /' H x 3 '/,/' W x 7V2" Lg. success, and now you can use it in your "giant" aircraft to eliminate glitches that can be caused by long servo leads and GAS CONVERSION STOPPER N o. 400 heavy duty servos. Jomar has also improved its SC-1 and Specially formulated replacement stopper is all that is SC-2 Electric Speed Control units through needed to convert any size Du-Bro fuel tank to gasoline. the use of higher performance Mosfet N O T E : When converting to gasoline use Du-Bro transistors, and has done so at no increase Neoprene fuel tubing. Cat. No. 225 or equivalent. in cost. The SC-1 handles 02 to 15 size motors running on five to 20 cells, while the SC-2 handles 05 to 40 size motors us­ DU-BRO PRODUCTS INC. ing up to 26 cells. Units are $49 and $60 respectively, and feature very low "on" 480 Bonner Rd. Wauconda IL 60084 (312)526-2136 resistance and voltage drop.

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 79 GOLDEN GATE ^Y.S. POWER, 1T’S AW ESOME HOBBIES ATLANTA 60...... $222.75 Y.S. .60 RE or SE — $148.16 Y.S. .60 H SE — $148.16 OMEGA 60...... $205.88 Y.S. .45 RE or SE — $96.85 Y.S. .60 H RE — $148.16 SIGMA II 60...... $245.50 ACRO STAR 60..... $163.15 Y.S. 120 FOUR CYCLE - - (Coming) QUATRO 40...... $150.61 WHEELS (prices are each wheel) HARDWARE TOOLS & ACCESSORIES EXCEED 40...... $151.88 TETTRA SUPER WHEELS...... $5.13 IM SERVO MOUNTS...... $1.64 TETTRA TUBING BENDER.... $4.76 50, 55, or 60mm; type R, V, or U. IM CAM LOCKS...... $1.49 NIWA TOOL KIT...... $8.95 HATORI HEADERS MK ALUMINUM WHEELS...... $8.41 MK CONTROL HORNS...... $ .88 TETTRA GLOW PLUG WRENCH $4.30 & PIPES 52, 56, or 60mm; (Radial only) DIGICON HORNS...... $1.05 IM ENGINE TEST BENCH..... $4.28 #601 10cc PIPE.... $ 34.23 MK PLASTIC WHEELS...... $2.31 DIGICON TUBES IN TUBES ...$8.10 IM STAND FOR BENCH...... $26.73 #401 7.5CC PIPE.... $ 29.95 45, 50, 55, or 60mm; (Radial only) (for operational flaps) MK WIRE BENDER...... $7.75 Headers to fit YS, OS, Enya IM PLASTIC WHEELS...... DIGICON HINGES (12)...... $1.61 MSK TRANSMITTER CASE ...$28.00 Webbra, OPS, & Rossi 30,35mm—$1.97; 40,45mm-$2.23 TETTRA AIR FILTERS RETRACTS 50mm—$2.48; 55mm—$2.72; 7, 9, 12, or 14mm...... $2.77 MK FUEL TANKS (Spare parts available) 60mm—$2.97; 65mm—$3.22 ISHIPLA FUEL FILTERS..... $2.00 450CC (15 oz) SLIM...... $1.96 MK S60 or S40 ISHIPLA PUSH RODS...... $1.30 400CC (13.3 oz) SLIM...... $1.69 NOSE...... $ 17.33 TETTRA SPARE TIRES $2.21 PULL-PULL HARDWARE.... $3.46 360CC (12 oz) ROUND...... $1.38 MAINS...... $ 24.50 specify size and type PULL-PULL HORN...... $ .74 300cc (10 oz) ROUND...... $1.38 360CC (12 oz) OVAL...... $1.38 Shipping and handling; orders up to $20.00, add $1.95; $20.01 to $50.00, add $3.50, over $50. add $5.00; Except 320cc (10.7 oz) OVAL...... $1.38 Kits (oversized) add $7.00 and “engine only orders” add $3.00; California residents must add SV2 V0 sales tax. IM 1000CC...... $3.92 VISA and Mastercard accepted. Add $1.65 for COD. International orders welcome, additional shipping charges will be applied.

When in San Francisco, P.0. Box 4412 · Burlingame, CA 94010 · Tel.: (415) 467-3170 „ see all our products at 10 AM - 6 PM PST Mon.-Fri. Send $1.00 ΤΟΓ San Antonio Hobby Shop. (415) 941-1278 WE NEED DEALERS!!! information

★ ★ ★ obechi veneer, popular in Europe for announces two softbound books, each Robbe Model Sport announces two new many years, is now available from Ace. featuring a particular aircraft. The McDon­ aircraft for R/C; the "Geier" flying wing One millimeter thick, it comes in 49-inch nell F-101 B/F Voodoo is covered in the and the "Parat TF." The "GeieiT which lengths, either 12 or 24 inches wide. Aerofax Minigraph series, No. 5, by Kevin spans 59.6 inches, is a thermal or slope Next is a heat shrink tubing assortment Keaveney. The 8-1/2 x 11-inch book con­ soarer with full span elevator-ailerons, packaged in a reuseable plastic box. In­ tains 139 black and white, 10 color pho­ providing high-performance aerobatics. cludes seven sizes, from 1/16 to 5/8 di­ tos, and many detail drawings, in a The "Geier E" is the electric powered ver­ ameter. thorough study of this aircraft. sion, and the kit includes the EF-76 II elec­ Ace's Nilite glow-plug lighter, with British Aerospace Hawk is the title of tric motor, prop, adapter, and mounting "(deadlock" plug connector, is now avail­ another book on the BAe Hawk basic and hardware. Flown with an eight-cell pack it able with built-in meter to monitor the advanced jet, by Roy Braybrook. This 8 x still has a wing loading less than some condition of your glow plug. Available 10-1/2-inch book contains 168 pages, 120 non-powered gliders. with or without charger. black and white and 12 color photos of The "Parat TF" is a high wing cabin The Nilite III puts the Nilite on board various models. Inside stories on the de­ trainer type aircraft with tail-dragger land­ your aircraft and provides servo switching velopment of the Hawk as a weapons in­ ing gear, for .09 to .15 size glow engines. linked to the throttle, for dependable idle struction trainer, ground attack aircraft, Span is 49.8 inches. The "Parat E" is the in the air and convenient starting on the and air defense fighter are revealed. In­ electric version, using the same EF-76 II ground. The switch box used in the Nilite cludes history and flight test program, motor as the Geier, which is supplied with III package is also available for separate along with detailing service in other the kit. Construction features Siros® cov­ switching jobs rated for five amps at 250 countries. ered foam wings and simple box-type volts. These and many other fine aviation fuselage or die-cut balsa and ply. ★ ★ ★ books may be ordered direct from Zenith See them at your dealer, or contact A unique little 10-1/2-inch span hand by dialing 1-800-826-6600. Tell 'em where Robbe at The Office Center, Princeton launch glider, the "Acrobat Ultralight you read about it! Meadows, Plainsboro, NJ 08536. Looping Glider," is available from Racing ★ ★ ★ Wings Co., Box 261226, San Diego, CA ★ ★ ★ Ace Radio Control, Inc., Box 511, 116 W. 92126. Made of tough poly-styrene plastic, 19th St„ Higginsville, MD 64037, is intro­ the colorful glider, configured like an "Big Boat, Small Price," is what RAM ducing a bunch of new items. A pneu­ ultralight, has been demonstrated at vari­ (RAdio Control Models) says about its new matic quick disconnect for use with 1/16 ous trade shows around the country, and O Bee 30-inch Electric Inboard sport boat ID plastic tubing (primarily for retract is expected to be sold nationwide soon. If for beginner or expert. Plastic parts are hook-ups) features a "Luer" taper for you can't find them locally, check the ad trimmed, ready for assembly. Kit includes quick, leak-proof seal. Female fitting has appearing in this issue to place your in­ Astro Flight 05 electric motor, complete threaded bushing for bulkhead mounting. dividual order direct from the factory. drive train and steering hardware, a RAM Ace also has the 1/16 I.D., 1/8 O.D. tubing ★ ★ ★ Simple Throttle two-speed reverse device, in three-foot lengths. Zenith Aviation Books, 729 Prospect Ave., and fuse. Just add batteries and two-chan­ For covering those foam wing cores, Osceola, Wl 54020, phone 715-294-3345 nel radio. Price is $99.95. At your dealer,

80 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER AIRCRUISER “25“ BRIDI AIRCRAFT DESIGNS, Inc. MIDWING BASIC TRAINER 23625 Pineforest Lane TRULY A BEGINNERS Harbor City, California 90710 FIRST BASIC TRAINER Wing Span 48'' (213) 326-5013 Dealer Inquiry invited. $29.95 W ing A rea 4 3 0 Sq. In. Engine 15-30 K R A F TY “60” AIRCRUISER “60” DESIGNED AS A TRAINER 60 SIZE BASIC TRAINER AND SPORT FLYER A SEMI-SYMMETRICAL • A SYMMETRICAL AIRFOIL KRAFTY “25” AIRFOIL FOR ADVANCED Wing Span 61%" MANEUVERS DESIGNED AS A $56.95 EZ-1 W ing A rea 7 2 0 Sq. In. Wing Span 61V TRAINER AND SPORT 2 METER GLIDER .Engine 50-61 W ing A rea 7 2 0 Sq. In. FLYER EASY BUILDING Engine 40-60 W ing S pan 51Va" A N D FLYING W ing A rea 4 6 0 Sq. In. Wing Span 78 V Engine 20-30 WARLORD "40'' Wing Area 544 Sq. In $33.95 9 LOW WING TRAINER Est Flying Wt. 26 02. EASY BUILDING $20.95 Wing Span 51" AND FLYING Wing Area 540 Sq. In. $52.95 EZ-2 100 m Engine 30-50 A LARGER VERSION ° o $59.95 OF EZ-1 GLOW PLUGS idle ba» gio plugs lor radial 4 cycle LOADSTAR “40 and sport engines LONG REACH Wing Span 98 V TRAINER & SPORT ONLY Gio plugs fo» piped engines, Wing Area 790 Sq. In gives better response and higher FLYER R P M Also good for racing and duct Est. Flying Wt 45 oz. fans SHIPPING AND HANDLING Wing Span 72V Add 50C per pluQ. or $2 00 for 6 or Wing Area 760 Sq. In more $29.95 Engine 25-60 $1.75 ea.

SHIPPING AND HANDLING: $4.00 per kit $2.00 per Additional Kit Prices subject to change without notice Foreign orders write for shipping cost. California Residents add 6%% sales tax. Use Visa or Master- charge, personal check or money order, no C.O.D.’s. (Bank of America or Mastercharge, designate) BUY FACTORY DIRECT OR RETAIL OUTLET or contact RAM, 4736 N. Milwaukee Ave., the spinner and read 6500 rpm, with a 24 and always appreciate good feedback. Chicago, IL 60630. Add $2.00 for direct x 12 prop. Not bad, considering it was One product that so many guys seem to order. · brand new and running slightly rich! get emotional about is propellers; we Next time out, the owner wanted to see usually either swear by them or at them. his bird fly. He was strongly advised not Too many BIG Bird people don't even to do so by the majority of those present Europe...... Continued from page 18 bother to balance their props, assuming that at the field. Although this ship was well- they come perfectly balanced from the fac­ built, we noticed excessive play in the ele­ tory. T'aint so! We'd have to pay a lot more two-stroke boxer engine! According to the vator, caused by linkages and servo- per prop for that kind of balancing to be manufacturer, this very compact engine installation that were not up to par. He delivers 8 hp, but he does not quote the done by the manufacturer. And then there resisted his urge to fly, but when his son are the guys who know their props ate not rpm at which maximum power is reached. Martin was taxiing the Laser around at the Weight, complete with the ignition system balanced, but seem to think that it doesn't end of the day, he suddenly decided to but without the necessary battery, is just matter...which is really strange behavior give it a try and opened the throttle. The under 8 lbs. Compact, I said, and the fol­ for people who go to the trouble and ex­ take-off was very impressive, but after a lowing measurements prove it: Width pense to have their flywheels balanced. I few rounds around the field, the big Laser (without spark plugs) 9-5/8 inches, dis­ have never bought a BIG prop that was in obviously decided to call it a day, pointed tance between firewall and the face of the balance. True, some were close, but all its nose down and disappeared behind the propdriver 6 inches. Fitting the plugs adds needed the accuracy and sensitivity of the trees. 1-3/16 inches to the total width. The total High Point Balancer for the kind of bal­ Well, the site of the crash appeared to ancing that really counts; otherwise, that height of the engine, including the carbu­ be a muddy ditch, so the damage was less retors, is 5-7/8 inches. engine will never be able to put out all the than expected; it was not a total wipe-out. power of which it's capable. The engine features a battery powered The cause of this all? A broken elevator Of course vibration could also be due electronic ignition system, triggered by horn! No wonder. The builder had fitted to a poorly installed engine. If your engine means of a Hall sensor. This ignition sys­ standard .61 size airplane rudderhorns on isn't solidly mounted, and if the mount is tem is built by a German firm by the name the moving surfaces of this giant model!! of Becker, which is also one of the smaller Although its maiden flight was not suc­ bolted to a thin, poorly supported firewall, you're not being fair to your engine, air­ manufacturers of R/C systems. cessful, I thought this to be an interesting The first time the owner and (partly) enough large model and engine to tell plane or radio. In fact you're probably go­ ing to "buy the farm" in short order builder, Jan van Ageren, took this Laser to you about it. Hope you liked it, and more the field, the day was usecT to get ac­ next month! · because of excessive vibes. quainted with the engine, and to run it in. With the engine and mount installed After some initial adjustments to both the properly, and the prop balanced, and with Tillotson carburetors, the engine appeared just a few minor trim changes, your new BIG B irds. .. Continued from page 23 to start, hot or cold, at the second or third bird seems to fly great...or does it? How flip every time. It ran very smoothly and is do you know what great is? You haven't obviously well-balanced. I could not resist he went wrong. Most manufacturers are tried any other prop size to compare per­ holding my mechanical Deumo-S tach to "straight-arrow" and value your business, formance so you really don't have a feel

MARCH 1985 81 Altech with the Enya line of engines. Any- HANDY S A N D I N G w i t h hooo, I couldn't resist the offer to see what this new import was like and get to try it "The out. I couldn't help but wonder why Al­ tech was handling an Italian gas engine; L ittle st didn't seem to me that there was room for Miracle it on the market. My plan was to get it on the test stand of the $2.25 first and make sure that it was worth put­ Workshop repl. strips— $ 1.45 ting in a bird; there's no sense jeopardiz­ Add 20% for postage. ing an airplane if the engine has low A PROFESSIONAL TOOL power and/or high vibration. However, my Send 250 trip to the hospital and this protracted SUITABLE FOR ALL for catalog. recuperation period messed up those HOBBIES AND CRAFTS plans, so GOFB Bruce Edwards stepped in From the Makers of... APPLIED DESIGN CORP. to help me out. In spite of bad weather, Mini-Glue Tips, Stray-Tray, Tee Bar, Mini-Saw, 738 Penn Street Bruce has had a chance to run this TRD iRuff-Stuff & Jewel Stripes El Seeundo. CA 90245 40, and was impressed; it appears to have one helluva lot of power (it's only a 2.44 cubic incher) and a remarkably low level of vibration. In truth I'm reluctant to repeat the tach readings that Bruce got us­ El Primero ing my AccuTach 2 ...because they seem "T H E F IR S T ' - A n easy fly in g , easy quite high for props like a 20x8 and a building glider for first-time R/C sail­ 20x6-10 on an engine that's barely 2.5 plane pilots and experts alike. WINGSPAN: 78 in (2 m) cubes. WING AREA: 663 sq in This TRD 40 is compact, and at first WEIGHT: 26 to 30 oz $24.95 glance looks very much like a Quadra painted black. There was little in the way of instructions accompanying the engine BUZZ WALTZ and no parts list or parts breakdown. I did R/C DESIGNS talk to Altech Marketing about the need for better instructions and more data, and 403 INDUSTRIAL PLACE I assume future engines w ill include a PALM SPRINGS, CA 92262 complete information package. (619) 325-5494 As you can see from my photo, the TRD Send $1 for complete BUZZ WALTZ kits brochure (refundable with order). does come with a mount and a muffler... VISA, M/C, & MONEY ORDERS only. and inside the mount is a spring starter (which probably accounts for the for what the plane can really do. This atti­ props; you're very likely to turn a dog into manufacturer using the word "automatic"), tude is a hangover from our small airplane a fine flying machine. I use only wood so it is a nice little package. As is, the en­ days; almost without exception we stuck a props because I feel more comfortable gine weighed 5-1/4 pounds, not too much 10x6 on a forty and an 11x7-1/2-8 on a six­ with them...and because I'm convinced more than the flying weight of either a ty, and let it go at that. Rarely was there that replacing a wooden prop is cheaper Quadra or a Zenoah. any attempt to find the best prop/engine than replacing a crankshaft. As I'm going to have to take it easy for combination. As we've found out with our I appreciate you guys hanging in there a while, Bruce is also gonna do the flight BIG Birds, the type and weight and angu­ with me...and don't forget to preflight testing. He plans to install the TRD 40 on lar settings of a particular airframe make and postflight that BIG Bird as though you his Big "E" and, weather permitting, I prop selection important. I use a 20x8 on really were going to be in the cockpit should have some sort of flight evaluation my Quadra-powered Fleet bipe because each and every flight. for the April issue. it's the best combo I've found for this 21 TRD AIR 40 AUTOMATIC pound bird. On the other hand, I use an Got a call a few months ago from Altech 18x6-10 on my Zenoah-powered Big "E" Marketing, Inc., that sorta confused me a TATONE'S NEW TEST STAND because that prop allows this 15 pound bit. The guy at the other end started to tell For quite a while, Tatone has had a fully ship to sparkle in the air. So don't be afraid me about a great Italian-made engine they adjustable cast aluminum engine test to experiment with different size/pitch were importing, and of course I associate stand that handles everything from 1/2A to .80 size engines. Well, never being one to sit still and become idle, John Tatone has WILSHIRE is the One Place for Sailplanes in the U.S... come up with a whole new, bigger, foreign and domestic in stock from $29 to $1200 . . . and, if you’re stronger aluminum test stand designed for into Electric Flight, WILSHIRE carries the most complete line engines up to 1.2 cid. There's a lot of beef anywhere in North America. Call us or write for our Catalogs .. . in this unit, and it easily and safely handled my OS FS-120, which by the way SAILPLANE CATALOG ... $2.50 is set up with CH Electronics Throttle Coupled Spark Advance and runs beauti­ ELECTRIC FLIGHT CATALOG ... $2.50 fully on 50 percent gas, 40 percent Catalogs are updated continuously . .. more items, all with photos. methanol and 10 percent Klotz KL-1000. Get the latest, with “Shirley” the cat, on the cover! Mr. Tatone had a fine idea making a test stand out of aluminum; all the other com­ mercially available engine testing units are ire m odel center made of wood, and sooner or later will RC Sailplane and Electric Power specialists for the U.S.A. succumb to a diet of glow fuel. This Ta­ Stop in and see our new store at 2836 Santa Monica Blvd. tone stand should last a lifetime as fuel Santa Monica, CA 90404 (213) 828-9362 can't hurt it...and because it's made from aluminum, it acts as a heat sink, also. A real dandy item! 82 MODEL BUILDER A Let us introduce you to your first R/C helicopter.

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IMAA FLY-IN'S Our new site at Yelm, WA, was appreci­ per-month meetings. The HOTMAC (Heart Of Texas Minia­ ated by all who attended last year...and THE ZAICS ABROAD ture Aircraft Club) Squadron, Waco, TX, is this year it's gonna be even better... Frank and Carmen Zaic recently just about all set up for their 3rd Annual because we're moving the fence that's returned home from an European vaca­ Dr. Pepper BIG Bird Fly-In on June 8&9. near the runway a good 300 feet further tion. John Blagg described a reception for They already have both their IMAA and away. As usual, our Bash w ill be both them in England: "Mike Hetherington and AMA sanctions approved for this two-day IMAA and AMA sanctioned for everyone's I drove round to Hilda and David Bakers' affair at Speegleville Park in Waco. How protection, and food/refreshments w ill be London "magic-house." Names such as does an 80x300-foot paved runway sound? available. Capon, Fairly, Judge, Imrie, Parham, Moul­ And that ain't all; all 12 acres of grassy Don't know who the Bash Boss is gonna ton, Kemp, Barr and perhaps thirty more area's gonna be mowed and looking like be, yet...so just drop me a line and I'll see were there to greet the Zaics. Hilda and a putting green. to it that you get all the details. her two lovely daughters served endless For more info and a flyer, drop a line to DEFINITION OF A QUARTER—SCALER cups of tea and plates of homemade good buddy C.B. Horton, Event Director, In place of a Tip of The Month, thought scones. I found Frank Zaic quite charming 916 Wedgewood, Waco TX 76710. you might enjoy this bit sent in by Chuck and most modest." We feel the same way And just a week later, on June 15 and Curtis, Bozeman, Montana. about both Zaics, and welcome them 16, IMAA Chapter 48 will be hosting its Quarter Scaler...is a modeler with a back to California! 4th Annual Fly-In at Converse, Indiana. shade too much ambition, a chain-saw en­ STILL IN EUROPE According to Chapter 48 Prez Bill John­ gine, and a set of baby-buggy wheels. Although we reported the results of the son, this site is an ex-WWII training strip Al Alman, 605 168th Street, East, #95, Flemalle, Belgium indoor internats previ­ with 52 acres of concrete..."and sur­ Spanaway, WA 98387. Let's see what your ously, Fernand Van Hauwaert, the organiz­ rounded by almost nothing taller than winter projects look like, guys. Those er offers a few post-contest comments and grass." shop pix of framed-up birds are most wel­ announces another meet for 1985. The Bill sez they have commitments from come... and don't forget some inflight event was declared a success, having at­ Tom Cook (F-4), Bob Campbell (C-130), shots later on. Black and white photos are tracted entries representing France, Ger­ and Gary Bussell (Sopwith Pup) to be best, but clear, sharp color prints are ac­ many, Switzerland, Japan, USA, Czech­ there. Also included at the fly-in will be ceptable. · oslovakia, the Netherlands, and of course, concessions, overnight storage, camping, FLYING SAFETY IS N O ACCIDENT! Belgium. a pitch-in dinner Saturday...and surprises. One useful idea employed by Uchida of Bill didn't mention who the Fly-In Direc­ Japan, was a caption on the outside of his tor was gonna be (it may be Bill), so send proxy-entry model box clearly indicating Hannan...... Continued from page 49 your queries to: Bill Johnson, R.R. 1, Box that the aircraft was in transit for a contest. 62, Gaston, Indiana 47342. This eliminated any potential customs And on the third weekend of July (20 door Model Flyers, such as Walt Takatsuka problems in a most logical manner. and 21), the Puget Sound Rocs (IMAA and M ilt Ishii, have the free use of the fine A series of special awards were donated Chapter 108) 3rd Annual BIG Bird Bash Kilauea Gymnasium, and other par­ to the Flemalle contest, by such firms as and Tea Social will be off and running. ticipants are welcome to attend the once- the Credit Communal of Belgium, the Ad-

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 83 If you're fomilior with ZAP'" Z-7™ DEBONDER removes CA+ you know ir's o super- cured cyonoocrylores from fosr super-adhesive. You skin, work surfaces, ere., so also know there ore even if you're sometimes instances where you need slower than SLO-ZAP™ time to moke final Z-7™ will give you o positioning adjustments, second chance. or fill o gap. Z-7™ DEBONDER is odorless, SLO-ZAP™ allows you the will nor "croze" most rime (up to 2 minutes) to plastics and comes in o get everything just right. It's safer, worer based o high viscosity, maximum chemistry. We know you're gap filling, maximum fillet going to like ir. forming, slow cure Wirh SLO-ZAP™ and cyanoacrylate* Z-7™ DEBONDER you For o limited rime we will won't get stuck. include o 1/0 oz. sample Hk 0 of our Z-7,M DEBONDER with * Available now or leading every purchase of SLO-ZAP1" * SsK'S** hobby shops everywhere. * Use our ZIP-KICKEtf Mfor immediore cure Regional Warehousing and Sales Offices after obtaining finol alignment PC-20 t WT I Ounc«l7l * £»*·1

TECH_. FRANK TIANO ENTERPRISES 628 RTE 32N NEW PALT2. N Y 12561 • and (914) 658-9906 1600 DELL AVENUE r o b o r l CAMPBELL. CALIFORNIA 95008 310 N STM ST 20134 STATE (408)379-9701 w ell t ST CHARLES. IL 60174 CERRITOS. CA 90701 reat youi to (312) 584 7616 (213) 860 1276 IZ-7. ______T M ____ DEBONDER! 1 individuals including Rene Jossien, F.L. ing Contest Director Carl Hatrak to drop plaques are costly awards) he said enough Van Hauwaert, and Jacques Delcroix. And the category for 1985. fun was had to justify sponsoring another every entrant received an attractive cloth An unexpected entrant this time was the contest in November of 1985. pennant. "Northrop Wing" (what else?) of M odel Results: Towline: Certainly this is a prestigious and well- Builder's Editor/Publisher. This beautifully 1. Jim Adams organized competition that merits sup­ crafted model took off in fine fashion, 2. Bud Overn port. Now is the time to prepare for roared skyward impressively, but descend­ 3. C. Lindley Flemalle '85, which will take place during ed with equal vigor still under power, ter­ 4. B. Wainfan August. Full details may be obtained by minating in a sudden arrival, rather than a Gas/Electric: 1. B. Wainfan sending International Reply Coupons landing. The post-mortem opinions sug­ Rubber-Power: 1. Don Larsen (available from post offices) to: F.L. Van gested an excess of thrust as the likely cul­ 2. Lynne Wainfan Hauwaert, Grand Place, 1/52, 4110, prit, but the ship did bow out in a 3. Dick Baxter Flemalle-Haute, Belgium. spectacular style...and appeared re­ 4. L. Sargent CLOSER TO HOME pairable. Scale: 1. Dan Walton (Kansas proxy entry) The 18th Annual Northrop Flying Wing Editor's note: As I'm willing to publish WING BOOSTERS Contest is now history. This event num­ the "after" photo, I deserve permission to Avid newsletter support for the North­ bers among the most relaxed and enjoy­ elaborate (that means make excuses). rop Wing event has long been provided by able events of the year. A big attraction is The design is the "Delta I" from old Aer- the Blacksheep News, edited by Tony the remarkable variety of entries. With the omodeller plans. I built one back in 1956 Naccarato and Marylou Sberna. Black- "deadly serious" aspect of some competi­ to fly w hile w aiting a turn to fly R/C. This sheep squadron members are somewhat tions removed, builders seem much more was when we all flew on one 27 mHz fre­ unusual in their multiple interests, taking willing to try innovative designs. Thus, quently, 27.255, and with super-regen part in free flight, control-line, and R/C even the non-placers are winners too, in receivers...only one plane in the air at a events. The Burbank California based the sense that they attract plenty of in­ time! That first Delta I flew great; had group succeeded in proving their exper­ terest from the spectators, and enjoy the many, stable flights...but I overlooked tise by capturing U.S. Nationals trophies built-in rewards of trying whimsical and/or one important thing...it was powered in categories including Indoor Cabin, In­ radical designs. Flying styles also vary with a McCoy .049 glow engine. The Cox door Glider, E.Z.B., Peanut Scale, AMA widely, ranging from long-running, slow- .049 TeeDee I used on the 1984 model Scale, Indoor R/C, Manhattan, Indoor flying indoor-style rubber-powered put out about five times as much power! Control-Line, R/C Pattern, Control-Line models through rocket-like gas jobs that What would have been a mild turn with Carrier, P.30, and Free Flight Electric! grab for the sky in no uncertain manner. the McCoy, was a screaming spiral with There must be a message here... Winners have ranged from ultra-high to the Cox! When I rebuild it, I'll either use BERT POND OFFERS ultra-low aspect ratio layouts, proving the old McCoy, which I still have, or I'll Anyone for compressed-air engines? there are many possible solutions to any install an .020 TeeDee with the prop on Model plans? Model airplane and full-size given problem. backwards! aircraft magazine indexes? Copies of old A disappointment this year was a short­ Although Hatrak reported a $41 finan- model catalogs? Frank Zaic Year Books? 84 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Bertram Pond has 'em all, and at very a dozen for yourself! reasonable prices too. He also offers a My good friend Phil Mahoney of Lime copy service for individual pages in old Rock, Connecticut, did just that...only he THREE NEW PRODUCTS aero magazines in his archives, as well as gave one to me in the process! Actually, it FROM A COMPLETE LINE OF some hard-to-find supplies such as bam­ was in return for sharing with you the A PREMIUM HIGH TECH boo. Why not send for the complete list? techniques involved in covering with HOBBY FINISHING SYSTEM One dollar will cover postage and han­ Coverite Micafilm. Well, I haven't yet put dling from: B.P. Pond, 128 Warren Terrace, down my Micafilm experiences on paper, Longmeadow, MA 01106. Please mention but that's only a few months away (I have Model Builder sent you! an Old Timer to cover, and that's going to BOREDOM? NEVER! be my test bed). I could tell you a few NOW AVAILABLE A dedicated hobbiest never has time on things right now based on my prior work­ his hands...witness Eddie Rowe, of En- ing knowledge of the stuff (I like it.), but A T YOUR dicott, New York, who says: "Can you im­ I'll wait to do the subject justice. HOBBY DEALER agine a retiree who has so many other To make a long story short, Phil and I things to do, he can't find time for all of both thought you all should know about them? In addition to models, photography, this dandy little glider designed by Ed fishing, fossil collecting, gardening... that Stinson of The Laughing Whale, whose only scratches the surface. I don't care for scale boat designs are so well known. the drivel that passes for most TV or The D ragonfly is a quick-build, school- movies...I now have five kids building yard sailplane. We have contacted Ed, and models and don't have time for my full-size patterns and a perspective draw­ own!" · ing are on their way. We'll publish the Dragonfly as soon as we get all the materi­ al together. Soaring...... Continued from page 30 FIBERGLASS MOLD TECHNIQUES Back in the April and May, 1984 issues, I wrote a series of step-by-step instructions PHOTO NEWS FROM GERMANY for making fiberglass molds and fuselage To supplement the caption information parts. Two of the letters I received in about the German aircraft pictured this response to those two articles contained month, Chris supplied the following: added information which I would like to The Floh is a V-tail two-meter design by include here. UUI Herbert Ihn. It has slightly swept wings The first letter is from Brad Markin, of HOBBY having a 160 mm (6.3 in.) root chord and Burbank, California. Brad writes: "/ am SPRAYADHESIVE 140 mm (5.5 in.) tips. The Eppler 212 was writing in regard to your articles on fiber­ chosen as the airfoil with camber-chang­ glass fuselage construction. I have built • For styrofoam wing Sheeting ing capabilities (flaperons), allowing a fuselages in much the same manner, but • with Coverage Control Tint wide speed range. The model weighs 1100 11.1 oz. can—$5.98 to 1200 grams (40 oz) for a wing loading of 40 grams per square decimeter (13 ounces per square foot). With stats like these I'm sure it's plenty fast! GG3 Herbert Heil and Ralf Markwort's two- HICH TECH FOAMING meter is a really high tech design. Its wings are constant chord, 240 mm (9.5 AIRCRAFT CLEANER in.), and made in a mold. The skin is a • Antl-statlc Paint Prep sandwich of fiberglass, foam, and fiber­ • Cuts Crease & Oils glass. The airfoil used is the Eppler 178. • Repels Dust & Fingerprints This rather thin section is plenty fast and • Cleans & seals Plastic Finishes very stable. What makes this model very 1.2 Oz. Can-$3.98 unusual, however, is the lack of a spar! Herbert Heil's D ohle is next in line for FREE FLIGHT HARDWARE TOOLS «COLLECTABLES ALSO some details. The sketch mentioned earl­ S2to cover postage and handling SANDABLE ier in the column was taken from this par­ ticular aircraft. The T-tail mounts on top of dIM ER0EKET REPLIEA5 the CF pedestal or post. The plane has a P O Box 13600 FRESNO. CA 93778 • Quick Dry span of just over three meters, a root chord • Lightweight of 250 mm (10 in.), and weighs 2.7 kg (six • Extremely Sandable pounds). Chris reports that the German Want REV-UP Props? 12.4 OZ. can—$5.98 *• Dohle is quite fast, maxes all F3B distance Pylon Racing. Pattern C Sport events, and carries weight well. f.f. & U/C... Huge Inventory!!! Coming Soon: A New Aerosol spray The stabs are foam core, covered with Paint System That Will Set New 0.15-0.2 mm thick fiberglass skins. This Row About industry Standards combination is very light and adequately Color Coat Hobby Spray Paint strong. Thanks, Chris, for the input! Custom Tuned Engines? • Super High Gloss LAUGHING WHALE "DRAGONFLY" Combat. Racing. Free Flight & Sport • Super Fast Tack Free Time • computer Matched colors What has a 48-inch wingspan, Jedelsky Competition Accessories & Parts • Fuel Proof. Unquestionably wing structure, a ten-ounce flying weight, Com Custom Engines C Parts and a cost to build of less than $15.00? Well, if you guessed a German D ohle For Detailed Brochure. Send 751 to: you'd be dead wrong. At the other end of Hustom Kraftsmanship the soaring spectrum flies the diminutive P.0. Bom 2699 Dragonfly, a glider so cute you'll want to Laguna Hills. CA 92659 make up a dozen as door prizes at your (312) 584-7616 P .0 BOX 1247 Ph: 719- 830-5162 310 N 5TH ST ST CHARLES IL 60174 next club meeting. Maybe even keep half MARCH 1985 85 for $2.50 each including postage, except PresentingJJie quick...highly maneuverable for overseas (Check ad.). The second letter comes by way of Philadelphia, Pennsylvania. Bob Mackay writes, "I have been experimenting with various mold release agents from poly­ FLORIDA vinyl alcohol (PVA) to dry lubricants. I re­ cently found one called MS-122, available -vee runabout from Miller-Stephenson for only $4.15 per 16-ounce can, postpaid. It is available in ' two formulas: MS-122 (blue can) and MS-122R ($4.30) for those who like a dye (red) included to aid visualization. Believe me, a very light dusting is all that is re­ quired. Also, it does wonders on pushrods and other dry lubricant applications. Your imagination is the only limit!" Bob continues and says that this price applies for one to four cans on a "sample" basis through their "advertising program." EASILY ASSEMBLED...EASILY OPERATED... Ideal for running sites where pond size and noise are a Contact: Miller-Stephenson Chemical Co., problem. Clean, impressive performance and maneu­ Inc., George Washington Highway, Dan­ verability ...thanks to the “Jackson 38" electric out­ bury, CT 06810, (203) 743-4447, or in the board motor and Octura propeller. Strong... light... un- Los Angeles area contact: Miller-Stephen­ sinkable. Features inner and outer skins of high- son Chemical Co., Inc., 12261 Foothill impact polymer, separated and strengthened by a rigid Blvd., Sylmar CA 91342, (818) 986-4714. If microcell foam inner structure. Outer surface is abra­ sion-resistant... decorates beautifully. Length: 23.6 in; you live in the Midwest, contact the same Beam: 7.5 in; Weight: 2.3 lbs. company at 6348 Oakton St., Morton Complete as listed: hull and hatch, speed controller, wind Grove, IL 60053, (312) 966-2022. shield, driver, deck fillings, complete sel ol decals, pushrods. double sided tape, transport/display stand, screws and hard­ It should be noted that these prices ware. instruction book w/diagrams. plus assembled "Jackson were pulled from an April 1, 1983 pamph­ 38" electric motor. Req'd but not included: Batteries - same let which stated "All prices subject to as 1/12 cars - 6.0 to 7.2V and 2-Channel R/C gear. change without notice." So if you can't * Mfd Oy Kyosho Corp · Tokyo Japan Only $ 8 5 .0 0 plus 10% shipping & handling find this stuff at the hardware store, and ORDER DIRECT ONLY IF UNAVAILABLE FROM YOUR LOCAL HOBBY SHOP · ILL RES. ADD 6% SALES TAX you want to order some directly, you'd bet­ FOR BETTER AND FASTER R/C MODEL POWER BOATING ter call first! OCTURA MODELS, INC. 7351 N. Hamlin Ave · Skokie, IL 60076 NEW CROSS COUNTRY SHIP While at a recent SC2 contest hosted by with one difference: in preparing a plug "Everyone does things differently, and I the North (San Diego) County Clouds or a m old before laying up the glass, I would appreciate your opinion on my soaring club, I had a chance to talk to have always waxed first, then applied the methods." Dean Clark of Lutmi Enterprises. He came PVA (mold release). The nice thing about The reason I chose to apply the PVA down from San Luis Obispo with his H i- the PVA is that it is water soluble. With a first, and then the wax, is that I could jinks glider and a few catalogs from his deep draw mold (most likely not a sail­ never get the darned PVA to quit beading company. We talked about cross country plane fuse) it can be very difficult to re­ up over the wax when I tried it the other soaring for awhile when Dean asked me move a part. A little warm water between way. If you have access to a spray gun, if I'd heard about the new Vygeur sail­ the mold and the layup w ill dissolve the then it is possible to mist-on several very plane that he was marketing. He handed PVA and the part w ill pop right out. I have light layers of the PVA without any bead­ me a catalog, and I turned to the appro­ made parts (again, not sailplanes) that ing up over the wax. I don't have the spray priate page. could not have been removed if not for equipment, so I work PVA first, wax sec­ Quoting from the catalog: 'This high the PVA. Obviously, your method also ond. I can't see how this reversal of layers performance cross-country sailplane com­ works well, but it seems to me that some would change the warm water part bines good looks and excellent flying be­ of the PVA w ill be wiped off, and the rest removal trick, it should work either way. It havior. It is one of the smoothest covered up if waxing over it, preventing is a good thing to know in case of a sticky sailplanes to fly. Tip stalls have to be the PVA from really doing its job. I have part. forced. Vygeur has a wide speed range. never seen a pattern (drips, streaks, etc.) in When I made my one and only Hydro­ 'The wings are polyhedral...in three a part from the PVA being directly next to Cal mold, I used a thin layer of vaseline as pieces for easy transport...with flaps in the glass. Your m ethod m ight also allow a mold release over the plug. When the the center panel. The wing spars are the wax to be washed from the mold, heat of the chemical change from liquid capped with carbon fiber and are fully which is not desirable, as the more a to solid occurred, the vaseline impreg­ shear webbed. m old is waxed and used, the better it gets. nated the plaster a little bit. When I went 'The airfoil is computer designed for Ask ski boat builders! to apply the shellac (not mentioned in the maximum lift and lowest drag, and is a original article) the shellac beaded up flapped section. Thickness is 13% for "When removing a part, the PVA is (again) and in general wouldn't behave. strength. washed from the part and mold, and only "The front section of the top quality, the PVA need be applied to the mold for When it dried, it was too easily pulled hand-laid epoxy fiberglass fuselage is the next layup, waxing again after five to away from the plaster, leaving an unusable large enough to accommodate all your ra­ ten layups. mold! Perhaps if I had used some MEK to remove the greasy Vaseline from the pores dio gear, thermal sensing devices, and a "One last tip. If using HydroCal as your of the plaster, it would have been OK, but barograph. The plywood tail cone is easily mold, before waxing it for the first time, you know what they say about learning assembled to the front fiberglass piece. apply three to six coats of thinned orange from experience...and hindsight! "With a scale-size fuselage and sixteen shellac to the mold. It w ill seal the mold If you are looking for a way to make a feet of wing, the Vygeur is highly visible and make waxing much easier. Even when mold cheaply and quickly, I would recom­ in altitude and distance." brushed on, I have never seen brush mend the HydroCal technique. Back is­ Specifications for this sailplane read: strokes from the shellac in the part. sues are available through Model Builder fuselage, 78 inches; wingspan, 16 feet;

86 MODEL BUILDER surface area, 1881 square inches; aspect ratio, 22 to 1; wing loading, (minimum) 11 Schlueter Free oz/ft2, (maximum) 13.5 οζ/ft2; control func­ tions, rudder, flaps, elevator (spoilers at Flight Models builders option). 3508 Poinsettia Ave The semi-kit goes for $150 and includes Manhattan Beach. Co. 90266 two-piece epoxy fiberglass fuselage (front and wing fairing), plywood tail cone, foam Dealer cores for wings and stabs, and full build­ Inq uiries ing instructions. In v ite d The full kit includes all of the above e plus: balsa sheeting, rudder and tips, spars, and all necessary hardware. For these extras, the price goes to $225. p a c if ic ACF It might be noted that the photo includ­ BLACK BULLET ed with this article was taken at the PARTIAL KITS (plans & .printed wood) PACIFIC ACE o r BLACK B U LLE T 2 0 " . 13 2 5 - 3 0 .M 70 - Western Great Race this past July near 4 0 ':* 6 .6 5 - A D O 12.00 SHIPPING FOR EACH 1 TO 3 Taft, California, and that the plane being KIT O R O E R -C A RES. AOO & ·/. TAX held by Dean appears to have less taper in its wings than the catalog three-view. Per­ haps the airplane in the picture was mere­ ly a prototype, because the fuselage and stab are identical to the Vygeur. Anyway, I like the looks of the three-view much bet­ ter, and that is the way it is being kitted. If you'd like more information, write to Lutmi Enterprises, P.O. Box 1697, San Luis Obispo, CA 93406. Prices quoted above include shipping and handling. Dealer in­ quiries welcome.

BOBBY GERBIN, AMA JUNIOR WINNER In all the coverage of the AMA Soaring Nats I've read, I haven't seen much men­ tion of this fine young flier, nor have I seen his picture. I'm referring to Bobby Gerbin, of Anaheim, California. Here is the one flier in all the Nats to win three first place Indoor Electric .Continued from page 52 trophiesl Now, I don't know if there were other fliers who achieved this same goal in other events, but no other R/C sailplane and the cameramen were in place and Bir- HEAT SHRINK tubing assortment pilot did. dy (Mathew) was at the front of the room. Contains plenty o f 1/16,3/32, 1/8, The windows had been frosted with spray. 3/16,5/16, 3/8, and 5/8“ D. tubing, Bobby flew his trusty LJMP Icarus two- all at a price much less than if you meter in the Two-Meter and Standard class Outside, huge spot lights shown in bought them separately. events at Reno. For the Unlimited event, through the frosting. "Birdy" sat on the PNUEMA TIC QUICK DISCONNECTS he switched to his venerable Pierce Aero edge of the teacher's desk. At the directors An alternative to the machined metal Paragon. He won all three Junior events. queue he started his lines and I launched type disconnects. The nylon fitting has a "fu e r" taper for a quick, leak Now don't you agree that we should the model off camera. It flew into view as "Birdy" said, "A bird can take flight proof seal for any system. For use recognize achievements such as Bobby's? w ith 1 /1 6 " ID plastic tubing. I knew you would agree. whenever it chooses." The schoolmates Contains male, female, and locking watch the flapper in amazement and chat­ ring. ter as it circles over their heads. Again and METERED N/ LITE // again we did the scene. The rubber mo- This unit nor only lights your 1.2- 1.5V AIRFOIL OF THE MONTH: glow plug, but also monitors the con­ dition o f the plug with a meter to tell SELIG S3010-103-84 you if it's open, shorted, flooded, or Attention all hand-launch glider design­ weak! A rechargeable 1200 MAH N l— ers! This 'foil's for you. Quoting the de­ CD provides enough starts for any veloper of this section, Michael Selig, "In Normal flying session. Now have the pocket sired convenience with the viewing the Theoretical Boundary Layer monitoring capability o f a power Summary Table, the S3010 is expected to “ Matched Performance System” panel. operate efficiently at very low Reynolds for TOP PERFORMANCE 60K50-Pneumatic Quick Disconnect numbers. Because of this, it is well suited K&B ENGINES Set S I.4 9 for R/C hand-launch gliders." The airfoil is 16 Airplane · * Marine 60K30—Heat Shrink Tubing Assortment 10.3% thick and close enough to flat- Κ&Θ PUEIS K&B GLOW PLUGS S6.95 7 Blends e cnotces 38K85-Metered NUite II, Combo bottomed to be easy to build. Let me hear (with charger) $29.95 from you if you build a model around this “ Matched Finish System” 38K86—Metered N ilite II, L ighter Only airfoil, okay? for BEST APPEARANCE $1 9 .9 5 Well, that's it for another month. Stay K&B FIBERGLASS CLOTH k&B M.cio-Baiioons FILLER S e n t! S? 00 for our com plete catBtoQ ΆΜ 'ACE K&B SUPER POXY RESIN K&B SUPER POXY THINNER item* aro available at your dealer. |l you order close to the magazine rack of your local K&B SUPER P0Xv PRIMER K&B SUPER POXY PAiN" direct, add $ 1.00 handling ft* hobby shop for future issues of Model K&B MIXING CUPS Builder. Please note my address for any D k « b manufacturing ACE R/C. In c. and all mailings: Bill Forrey, 5815 E. La 12152 Woodrutl Avenue Palma, No. 281, Anaheim Hills, CA 92807. Downey. California 90241

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 87 PRESENTING

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around. Mr. Jean Andrews, helicopter pilot and indoor modeler tells me he is using THE SHAPE OF THINGS TO COME! it to attach condenser paper to indoor dur­ NEW computer-designed 14 x 6 by ation models. He cuts it half and half with Taipan. Ultra high-strength fiberglass re­ water and reports that it works great. Most inforced nylon. Outstanding perform­ ance for .60-.90 2-stroke and 4-stroke of the weight evaporates away when the engines! List S7.95/INTRO Price $6.95 water disappears. Worth trying. (5-Pack = $30.00) Speaking of cement, some of us remem­ ber the little bottle of clear cement that was enclosed in every Megow kit in the '30's and '40's. A small cork was stuck in the top. The strange thing was the smell of this glue. I haven't noticed a cement since with this same pungent odor. Does any­ one know what was in this concoction? The 1940's also bring back memories of those 5 and IOC Japanese silk and wire TAIPAN True Pitch = Top Value! rubber planes. The wheels were punched S ire R etail C ond or 10-Pack out of thin metal, I remember. I used to fly 7 x 4 0.75 0.49 4.50 them from our front porch. Do you sup­ 7 x 6 0.75 0.49 4.50 pose there are any of those little planes 8 x 4 0.85 0.55 5.10 '84 in New York and Los Angeles. By now still around? I sure would love to own one. 8x6* 0.70 0.4 6 4.20 it should be playing in your local theaters. 8 x 6 Many times. I've told my son Chris about 0.85 0.55 5.10 The best part of it for me is that I got the 9 x 4 1.05 0.69 6.3 0 the great fun we had with them. 9 x 6 1.05 0.69 6.3 0 credit line I had asked for when we started Please send photos for this column and 10x4 1.25 0.80 7.50 the picture. Go and see "BIRDIE" if you comments to: Ken Johnson, 10927 Anda- 10 x 6 1.25 0.80 7.50 can and let me know what you think of it. sol St., Granada Hills, Ca. 91344 · 11x5 1.50 0.97 9.00 HAIL COLUMBIA 11x7 1.50 0.97 9.00 (Top trade discounts for dealer/dist) Latest word from Ed Whitten is that the *8x6 unreinforced for beginner C/L Columbia University flying sessions are Electronics.. Continued from page 38 on again through March of 1985. For infor­ CONDOR HOBBIES mation on dates, call Mark Ferguson 212/ 17971 Sky Park Circle, Unit "D " 280-6972, Ron Williams 212 / 722-5262 or John's modifications to Fritz's and Joe's Irvine, CA 92714 Ed Whitten 212/724-0282. circuits will probably cure some problems Telephone: (714) 250-1425 Larry Peters advises that Glassboro, New in some applications, and they are pre­ Handling Charges: Jersey State col ege indoor flying is possi­ sented here as received. They are inter­ C.O.D. & Credit Cards - $ 4 .7 5 ble in January and March. Call Larry at C O lM fO t* Prepaid Order - $Z50 esting; be sure to take a close look at 601 /887-1404. them... right after you read "Dear lake!" The 2nd World Inter-Gnats proxy con­ MR. O'HARA'S BATTERIES tors were getting 20 winds, one after test is looming on the horizon. This meet Back in the December column, we dis­ another. For 2-1/2 hours we did the scene for 8-inch models is great fun and a real cussed some problems that a P.M. O'Hara where the flapper crashes into the win­ challenge to send in your airplanes to be in Minnesota was having. It seems that he dow, falls to the floor and the students all flown by the expert modelers at the MIA- had run into a couple of packs with leads laugh. The heat was so intense that two of MA club in Florida. The competition will broken off, apparently burned. A couple the big lights exploded, sending a shudder be worldwide. For details, contact Doc of readers had some comments on the throughout the room. Finally, at 6 P.M., Martin at 2180 Tigertail, Miami, Florida subject. First to be heard from was Larry the director said, "Cut and print." Every­ 33133. Sribnick, of SR Batteries, who wrote: one went out to the grass school yard Work continues on the doors at Hangar "Naturally, I read with great interest where a complete dinner was waiting for One at Lakehurst NAS, N.J. A full sched­ about the problems Mr. O'Hara was hav­ us. I sat across the table from Mathew and ule is expected for 1985. Call Dan Domi- ing with his wiring. Mr. O'Hara did not Al (the other lead). Back at the hotel I na at 609/448-2840. contact us about finding "burned" and turned the six used models over to the REMEMBER MUSELAGE "scorched" leads in his SR and Futaba "Birdy" people. The next day I flew back When I was a kid in school we used packs, or we would have tried to solve the to L.A. without the flappers. A month later muselage in the familiar glass bottle with problem for him long before this. I received a handsome check. the red rubber tip. It was mostly to glue "I think you came to the right con­ The film was released in December of paper to paper. Well, I guess it's still clusion about the probable cause o f

88 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Model Magic Filler COMPARISON CHART New From Model Magic Products Quick setting. Model Magic Product ‘X* Adhesion to: Model Magic Light weight. Non shrinking Balsa Excelent Very Poor Foam Fiberglass Epoxy Plus Strength 2 Part 8 Min Fillets Flexing Gap filling Use anywhere a two part epoxy Ding repair Spreadrig Is used. 25% Lighter Sandable Fuel Resistance Good Carveable Excellent Gap Filling Non 8 »l. o z. Sanding As medijm balsa Soft balsa Sagging Superior Strength Sands $5.95 Retail Hardness As Hard Balsa Soft balsa Fnishing Any finish/covering Not al and carves like basswood!) M.M . T ip : Shelf Life 'til used up Spoils in 5 -7 mo. 6 fl. oz. S8.95 Form beautiful fillets using plastic spoon. Tnt Acceptance Excelent ? Eaual to more than 8 wt. oz. Water Resistance Very Poor of regular epoxy. See your dealer first then write or call: Model Magic Products Tost methods and data avaiabto on request Model Magic Products Inc. P.O. Box 7784 St. Paul. Minn 55119 When you care enough to f i the very best, insist im PO Box N7B4 St Paul M N SSIH 71V 4.! V W on Model Magic Fler. Or Circus Magic Filer 715 4 2 5 -1 3 9 7 broken wires being mechanical failure for ------\ other brands of packs. Many packs have little or no strain relieving on their inter­ INTRODUCING WORLD'S nal wiring, and slack in the wires inside NSW HEAT GUN... the plastic case allows the wiring to move around from vibration, causing the leads Versatile Heat Gun provides 1000 watts of heat shrinking power for to fatigue and eventually break. getting the wrinkles out of the most "However, vibration proofing a pack is stubborn plastic film covering one of SR's major concerns. The connec­ materials Rocker switch in pistol tor leads on all of our packs, as well as the gnp sets high or low heat Air intake welded steel straps between cells, are baffles regulate air flow Nozzle included to direct air flow Excellent heavily strain relieved so even a direct companion to the World Engines and deliberate pull on the lead w ill have Covering Iron below to break the strain relief before any load (Catalog Number 20334) is put on the solder connections them­ selves. In addition, the heavy Polyolefin $22.95 outer covering we use on our packs is designed to compress the wiring against & COVERING IRON the cells so that no movement can take Covering Iron provides for a wide place which would eventually cause the MB, I think possibly you may have missed range of temperature settings up to leads to fatigue. the boat slightly in describing the correc­ 450 degrees Farenheit w ith 170 "Like you, I doubt that Mr. O'Hara’s watts of power Large non-stick tion for a problem a fellow was having shoe is contoured to make covenng MEN charger could be so out of adjust­ with broken or nearly broken wires in his compound curves and tight corners ment that it would be causing the prob­ battery packs. I read some time ago in one extra easy Sturdily constructed lem, but his reference to "burned" and of the R/C magazines (If I remembered w ith wooden handgrip and ceramic "scorched" wiring, covering, and foam where, I would tell you) that it is a charac­ heatmg element Automatic thermo­ seems to indicate that the cause is electri­ stat built into temperature control teristic of Ni-Cd packs that the enclosed (Catalog Number 20335) cal rather than mechanical. As is always wiring becomes corroded and brittle after the case, i f Mr. O'Hara w ould like to send a time, due to chemical action. The end S 17.95 the SR and Futaba packs to me, we would result is a broken wire. I did not believe be glad to repair them and try to deter­ this at first, but since then have been told mine the cause of the problem. In the the same thing by a number of knowl­ WORLD almost three years of SR Batteries, no one edgeable people. I had thought that a has ever reported a broken strap between 'sealed' Ni-Cd cell was really sealed, but ENGINES cells or a broken connector lead, so I am I guess not. 8960 Rossash Ave. more than interested in solving the prob­ "Incidentally, I believe I met you at the Cincinnati. Ohio 45236 lem for Mr. O'Hara. scale flying area during the Reno NATS; I Phone: (513) 793-5900 Telex: 214 557 “ By the way, we don't recommend the was the guy who needed a screwdriver to MEN charger for our 150 Series packs be­ fix his glasses." cidentally Cal, you read about in this cause our tests showed that the charger There is little I can add to Larry Scrib- column, referred to as the Black Death, would go to low rate at only a 50% nick's comments on the subject. Unfortu­ back in November 1983. This corrosion charge and we were concerned that peo­ nately, I seriously doubt if Mr. O'Hara still does occur, and it will eat wires to the ple would leave the pack on charge at the has the subject packs in a damaged condi­ point where they will break, but for some low 40ma charge rate too long and over­ tion so that he can send them in to Larry unknown reason it does this only to the charge the pack. A rate of 40ma w ill for the evaluation that Larry so kindly negative, or black wire. The phenomena charge a dead pack in only six hours. With offers to do. So we'll probably never know. was later referred to in one of the British any other charger I would have suggested But if anyone else should run into a simi­ magazines, called therein the "Black Wire a resistor in the charge lead, as you have lar problem, or any other with SR batter­ Blues." On that end of the pond, the writer mentioned in your column, but I didn't ies, please rush the pack off right away had even obtained some battery en­ know how the resistor would have affect­ without repairing it, Larry may learn gineer's opinions on the subject, the con­ ed the high rate cut-off circuit of the MEN something that will benefit all of us. census being that it was related to high charger. I did include a lot of conjecture as to rate or over-charging. But it only happens "Let me know how we can help." what the cause of this problem might be to negative wires; the O'Hara problems On the same subject, we heard from Cal in the December issue, so I won't repeat were occuring with positive (red) wires! Malinko, of Rialto, California, who wrote: it here. One thing it isn't is the corrosion "Concerning your column in the Dec. that Mr. Malinko mentions...which in- I do have some late input to this nega-

MARCH 1985 89 short pulses of high voltage to the battery, SMALL PRICE which apparently due to their short dura­ tion are safely carried by the low current capacity fuse. To test this out, I first charged the battery OurBIG O Bee 30 inchBOAT Electric Inboard is the perfect sport boat for be­ with the system tester, and dropped it with ginner or expert. The plastic parts my Ace Digi-Pace to establish the normal are pretrimmed, ready for assembly. capacity. Then, I charged it with the C-50, The kit includes Astro Flight 05 and again dropped it to see if it had motor, complete drive train and charged to the same level as before. Not steering hardware, a RAM Simple Throttle 2 speed reverse device and enough difference one way or another to fuse. Virtually unsinkable. Just add the batteries and a two channel radio. worry about. ONLY $99.95 Why should any difference be expect­ • See your local hobby shop · All products made in U.S.A. ed? Well, in addition to the fuse · Send a S.A.S.E. for full inform ation. mentioned, the JR radios have diodes and/or rate setting resistors in the charge 4736 N. Milwaukee Ave. — Chicago, IL 60630 circuits. The diodes prevent testing the in­ IF UNAVAILABLE LOCALLY, ADD $2.00 FOR DIRECT ORDER. NO C.O.D. stalled batteries with either voltmeters or battery dischargers. In my testing men­ tioned above, I discharged the battery tive corrosion problem. As stated, it is be­ manufacturer of the Power Pacer (not the directly through the plug installed on it, lieved to always be connected or caused cycler I have) to provide a replacement. before it goes through any other circuitry. by charging, but I have since run into a They did, and it works, but now I have to It is possible that these added components case to disprove this. I use Ni-Cds to pow­ multiply the indicated time by 2/3 to get would upset the M.E.N. charger's sensing, er my camera's strobe light; using a pack the correct timing!" but apparently they don't. I would like to which drops in and connects via two This ought to serve as a reminder that in mention, though, that this charger does spring loaded contacts. Every now and spite of the obvious similarity in the way not resort to trickle charging once the LED then, the unit will quit, due to corrosion the two units look, the old "Super Cycle" goes out. That is, it does not drop to a rate on the negative contact, which must be and the presently available Taylor "Power low enough for safe continuous charging, cleaned off before it will work again. Now, Pacer" are not the same nor are they made it should be removed after the normal the packs are not charged through these by the same people. Cal's hint is worth re­ fourteen to sixteen hour charging period. contacts, and as a matter of fact are not membering though, it is better to have a ELECTRONIC SWITCHES even charged in the strobe. So whatever 2/3rds reading timer than one that doesn't We hear from ski country... Bruce the cause is, it has to do with the current work at all. Agustus writes from Sun Valley, Idaho: flow through the negative conductors and I hate to shatter a myth that most of us "Always enjoy your column...it's the to the first break, I have seen wires in have lived with all our lives, but there are surest place for me to find a discussion of transmitters completely affected by this doctors around with legible handwriting. something I know nothing about: elec­ corrosion from the battery to the switch, The following note came in from H.W. tronics. Anyway, what I understand, I like. but no trace past. Wong, an MD in Eugene Oregon...I "A technical question...! build old Weird! And it could happen to didn't have the slightest problem reading timer ignition models and use a servo you.. .especially in your older equipment. it. And yes, it WAS handwritten: driven micro switch to kill the engine. Look for fuzz around the negative termi­ "Can I use the M.E.N. C-50/4 (charger) Seems p rim itiv e ...is there some way to nals of the battery, and if any is present, to charge the Rx and Tx packs in my new rig a switching circuit direct to the Rx to push back the insulation on the wire. If it IR (CIRCUS) Century VIII pattern radio/" cut off the ignition (3V, about 1 Amp.)/ is not clean and shiny, but black or black Fortunately, the Century Seven which Such a system would eliminate the weight speckled, you've got a touch of the Black belongs to a friend in Mexico and which of one servo and micro switch and reduce Death, and the only cure is to replace the I wrote about in the January column was drain on the flight pack. It would be per­ entire wire from the battery to switch, here at the time the Doc's letter arrived, so fect to operate it from the throttle circuit, plug, or whatever. I was able to run a couple of tests for him. but any one w ill do." So now you found out that I also fix eye­ The bottom line is "Yes!" Well Bruce, such circuits do exist, and glasses in my spare time! Cal M. also As mentioned back in January, this we've published two of them in recent sends in another interesting piece of infor­ transmitter is unique in that a fuse is in­ months. One was by Fritz Mueller, to mation about the Super Cycle, for which cluded in the battery circuit, which will which you will find an update this month. we are still furnishing shematics: go if any attempt is made to fast or quick- It originally appeared in January 1983. "One of the timer motors quit in my cy­ charge the battery. The M.E.N. charger Another circuit, this one by Floyd Carter, cler, and I asked L.R. Taylor, the present works slightly different, in that it sends appeared in the April '83 issue. They are slightly different in circuitry, but both ac­ complish the same thing; they work off the receiver pulse to operate a relay, which in turn can do either "O N" or "OFF" switching as desired. Unfortunately, the circuits involved are relatively complicated, and the savings in weight is not that great, actually on the order of grams. In this case, when turning something off is the only requirement, there is another approach... not any less primitive, but it will save the weight of a servo. It involves the use of a Push-On/ Push-Off switch, a type of switch which works exactly as it's name indicates. One could be rigged to operate so that a momentary application of FULL control of one of the channels would operate this switch from "O N" to "OFF" Radio Shack lists a "Soft-Feel" switch

90 MODEL BUILDER rated at 3 amps which will certainly do the job; No. 275-1565. There is also a smaller one, No. 275-1555, that merits a second look. In use, they can be mounted Soldering Tools adjacent to the servo so that the arm presses on the button, or remotely with pushrod operation. Try one Bruce, they Λ ψ> are guaranteed to turn you on...er, off! Model 1200 delivers Talking about ski country, you guys up PS 100 watts, heats instant­ there sure are lucky, getting that nice long ly. Two tips included. building season every year. Even Mitch, Model 900 delivers 60 who lives up in Washington gets a chance j ModModel 1200 watts. And Model 300 delivers 30 watts. Great to build. Us poor Californians are forced Model 900 to fly all year long...DARN! for all soldering jobs. ELECTRONICS CORNER BOOKSHELF Send 25 cents for cata­ log and price list. K&S For those of you who are interested in Engineering, 6917 W. electronics in general, Radio Shack has re­ 59th St., Chicago, Illi­ cently released a new book which you nois 60638. Telephone: will find useful and interesting. It is enti­ Model 300 312/586-8503. tled, of all things, "Getting Started in Elec­ tronics," bears part number 276-5003, and is reasonably priced at $2.49. The book starts off as basic as you can get...back there with Ben Franklin, but rapidly gets into modern solid state elec­ tronics and describes many of the com­ ponents and much of the language used in current!!) electronic equipment, much of which we see in R/C. Actually, except for a few IC's such as servo amplifiers, en­ cient." The larger the horizontal tail make that forward plane as large as we coders, and decoders, which find uses volume coefficient, the more stable the want (and move the CG way forward to keep it stable). only in R/C equipment, all of the other airplane. (It is called tail "volume” co­ If we make the forward plane the components and most of the circuitry we efficient because it consists of an area same size as the rear plane, we are half­ use is common to electronic equipment in times a linear dimension.) way between a conventional airplane general. Free flight modelers, however, use lifting tails. How can a lifting tail look like and a canard. Now we don’t know which The book is illustrated only with a reflexed trailing edge and produce is the wing and which is the "tail", so we sktcehes and line drawings, but they are longitudinal stability? The answer lies in simply call it a tandem airplane. Tandems all clearly done and are a great help in un­ the fact that the tail doesn't actually can also be made completely stable, derstanding the subjects they describe. It'll need to have a negative camber (reflex) again, by the same rules. The forward serve as a good reference, and even in­ or a negative angle of attack so as to wing must be more heavily loaded than cludes some circuitry which might find it's produce negative lift. It can provide the rear wing. Therefore, if the areas of way into your modeling, such as light stability if it has positive lift but less lift the two wings are equal, the CG must be flashers and voltage level indicators. per unit area (less loading) thanthe w ing. ahead of the halfway point between the Some of the Radio Shack components Stated another way, the forward surface forward wing’s 25% chord point and the are over-priced, though they do make up must operate at a higher lift coefficient rear wing’s 25%chord point (mean aero­ for it in availability, but this is one product than the aft surface in order to provide a dynamic centers). The farther ahead the that is well worth the asking price! · stable airplane. CG is, the more stable the airplane with What about canards? The same laws any configuration (if we have enough apply. The forward horizontal surface or elevator to keep the nose up). Gossamer.... Continued from page 21 foreplane (I refuse to call it the tail, So, knowing that I can make any con­ because tails are behind) must have figuration stable, what configuration did An airfoil with a reflexed trailing edge greater surface loading (greater inci­ I choose for my ultra-slow RC flying (S-shaped camber line) is stable. A wing dence and/or more camber) than the aft machine? The problem turned out to be made with a reflexed airfoil will fly stably surface, the wing. However, we can far from simple. I wanted to eliminate alone as a "flying wing." Some of us have built and flown control line combat or RC flying wings with symmetrical airfoils (which should have zero stability), but don’t forget the elevator! Because we JOHN POND balance the plane with the CG ahead of the center of lift, we must use up elevator Old Time Plan Service in order to fly level. That up elevator acts like a reflexed trailing edge, and we have The largest selection of plans in the world at the most a stable flying wing. reasonable prices. Each list $1.00 In a conventional airplane, the down­ load on the tail replaces a reflexed trail­ No. 15 OLD TIMER F/F GAS ing edge on the wing, making an airplane with an unstable wing section stable as a No. 15 OLD TIMER RUBBER/TOWLINE total system. Here, however, the "re ­ No. 15 OLD TIMER FLYING SCALE A through K flexed trailing edge” (stabilizer and ele­ No. 15 OLD TIMER FLYING SCALE L throu^i Z vator combination) is way back and separated from the wing by the aft fuse­ New plans prices effective Dec. 1983 to Dec. 1985 lage (the tail moment arm). An aero- P. O. Box 3215 dynamist refers to a large horizontal tail San Jose, Calif. 95156 area times a big tail moment arm as a Phone (408) 292-3382(Tues. or Fri.) large "horizontal tail volume coeffi­

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 91 clean (non-gooey) airplanes are nicer, too. Gemini M.T.S. Most designs consist of a series of (A SUPERIOR MULTIPLE TASK SAILPLANE) compromises. This one was no excep­ tion. A pure canard wasn’t promising, Standard Class R/C sailplane for and an equal-wing tandem design wasn’t sport, F3B, and AM A contests good for different reasons. So, I built the Specifications: Gossamer Slow Poke Mark One as a Wingspan 100 in. COMPLETE KIT WITH compromise between the two, a pusher Wing area 930 sq. in. PRECISION CUT PARTS. canard with a very large foreplane (or a Flying weight 44 at. ALL HARDWARE. AND tandem with a front wing smaller than Wing loading 6.8 oz. /sq. f t FULL-SIZE PLANS Wing section MB-253515 the rear wing). I still couldn’t balance it (15% semi-symmetrical) without a fairly long nose moment arm, Max. ballast 4 lbs. using a .10 engine, but it looked like it would balance with a C-mark .03 engine. Pierce Aero Co. To get the th rust needed to fly at the very low L/D available near Cl max, however, 9626 Jellico Avenue, Northridge, CA 91325 Phone (213) 349-4758 I put a Kress Technology, Inc. CP 020 Geared Prop Drive Unit on the G-Mark .03. This raised the power plant weight to P.A.W. DIESELS 3.6 ounces, but left it below the .10 power plant weight. England's Finest For a very slow model, a gear drive is .049 to .35. R/C and Standard an efficient way to go. We don't need Send $1.00 for list. much power. Remember, power is Clutton, Eric thrust times velocity, and our velocity is 913 Cedar Lane Tullahoma. TN 37388 very low; however, the drag of the big wing at the high lift coefficient is also reflexed trailing edge (low net camber) high, so we need considerable thrust. to be stable, flying wings are stuck with Big gear-driven props provide much low maximum lift coefficients, and more thrust than direct drive, small therefore, they have to fly faster for a props on the same engine; nearly 50% BUILD YOUR given area ana weight. more thrust with a 2:1 gear reduction. Why not use a conventional wing-in- For more data on this subject see Bob OWN ROCKET the-front pusher configuration? At first Kress' article, "Geared Props for School- glance, two reasons why not: 1) it is diffi­ yard Scale" in the July 1982 RCM. MOTORS! cult to balance a pusher without a big The prop should be as low pitched as you can buy (usually four inch pitch). WE CAN SHOW YOU HOW! fuselage nose moment arm, and long noses weigh ounces, increasing the Even four inches is twice as high as it minimum flying speed; and 2) a normal, should be for ultra-slow models; but if •4 0 POUNDS aft stabilizer flies with a little download. there is adequate power and torque, a The wing has to lift not only the weight four-inch pitch is OK. It is, of course, a THRUST! of the airplane but the download on the fact that to fly ultra-slowly (near the stall) tail, therefore, higher wing loading and requires more thrust than to fly the same • 50Φ EACH! higher minimum velocity. plane somewhat faster. As the velocity Let’s change that parasitic tail into one decreases, the lift coefficient must • With a rock tumbler and some simple hand tools increase to keep lift equal to weight. we II show you how to build YOUR OWN rocket that contributes some of the lift so we engines in your own garage or workshop for 1'5 to can fly slower. So how about a canard? Unfortunately, the drag coefficient in­ W10 the cost ot the commercially marketed motors The foreplane of a canard lifts. But no, a creases very rapidly at the higher lift • INTERESTED? Just send us $2 00 and we ll mail you coefficients (high angles of attack). The our brochure along w ith a WORKING SAMPLE o1 an canard doesn’t look optimum either electric igniter that YOU CAN MAKE YOURSELF from because the canard foreplane must higher drag coefficient has more effect materials you ll find around the house operate at a higher lift coefficient than on the total drag than the decrease in TELL YOUR FRIENDS ABOUT US! Were the 00 IT velocity has. In other words, the lift-to- YOURSELF ROCKET people the wing for stability, which means that the Cl of the wing must be less than we drag ratio is much poorer at high angles Write to Department MB 15. The Teleflite Corporation of attack. There is a most economical 11620 Kitching SL. Sunnymead. CA 92388 could otherwise make it, to keep it below the Cl of the foreplane. Less unit (max range) speed to fly any airplane, lift in the wing resultsinhigherminimum but it is neither the fastest nor the flight velocity again. For minimum slowest speed the plane can fly. the landing gear and to hand launch it, speed we must get maximum lift out of Let’s look at filling the requirements thus making it lighter and consequently the biggest area, the wing. for a high lift coefficient. Lots of camber slower. I wanted to make it a safe air­ There remains the tandem configura­ in the airfoil, but optimum model high- plane; one which would strike a person tion. A tandem with two equal wings lift sections don’t always look like full- without injury. The low kinetic energy is must balance about 40% (from the front) scale high-lift sections, especially when part of that solution, but I didn’t want a of the distance between the mean aero­ we are trying to fly ultra-slowly, because meat slicer up front either, so I wanted it dynamic centers of the two wings. The of the very low Reynolds number (no to be a pusher airplane. It should be very power plant I intended to use, a .10 with relation) of the very slow flying model. light, have lo ts of lifting area, and prop, muffler and two-ounce tank of For very low Reynolds numbers, we operate at a very high lift coefficient, in fuel, weighed twice as much as my need a thin airfoil and a sharp leading order to fly as slowly as possible. Cannon Super Micro RC gear with three edge (see article by Ted Off on page 23 Someone said, “ A flying wing ought to servos and a 250 mah battery. Again, I of the February 1975 Model Builder be a good choice, because it has no fuse­ had a balance problem with a pusher rhagazine). When we have lots of lage and no tail, therefore it would be design. I couldn’t get the CC far enough camber on a thin section, we end up much lighter” . Yes, but lightness is only forward unless I put the RC gear in the with "undercamber,” like a bird’s wing. part of the slow game. Actually, a flying front of a long (heavy) nose. Did I give We can do better than a simple, wing is one of the poorest choices for an up on the pusher idea and go tractor? highly-cambered section, though. ultra-slow flying machine. The problem Not yet. The safety of a pusher was is that because a flying wing has to have a important to me on this project, and Continued next month ...

92 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Voltmaster... Continued from page 39 CLASSICS! with any .1 volt change. It would be easily and accurately read. Things being what they usually are, the values we are interested in for R/C work are not as neatly even mathemati­ cally, but the same priniciples can be used. We thus expand a portion of the meter’s scale to indicate only the nomi­ nal voltage to be read, plus or minus a practical small percentage. This has been done by Ace R/C in the design of its “ Voltmaster” , a precision Expanded Scale Voltmeter which has the following voltage ranges: 4-Cell — 4.5 to 6.0 volts ~v- 6-Cell — 7.0 to 9.0 volts BEE Z 8-Cell — 9.0 to 12.0 volts 10-Cell — 11.2 to 15.0 volts 1/32 scale plastic model kits of Golden Age To closer simulate the actual working classic aircraft1 Colorful, highly detailed conditions of the batteries under test, miniatures Send $1 for fully illustrated cata­ the "Voltmaster” also provides a load, log of these and other kits and accessories. selectable between 200or 500 milliamps, DEPT. MB which can be applied as desired, at the 181 PAWNEE ST. press of a button. SAN MARCOS, uos me The Ace R/C Voltmaster, like most CALIFORNIA 92069 Ace equipment, is available in both assembled and unassembled versions. If of the plastic around the terminal if you of a dual op-amp, one half of which is yours is the former, you need only to get a little heavy handed with the solder­ connected as a voltage follower, and the read the few ideas presented here, the ing iron. And oh, it is asmall iron you are other as an imbalance detector. The in­ operating instructions furnished by Ace, using, right? My Voltmaster was assem­ coming voltage is compared to an and you are on your way to additional bled using a 12-watter, which provides internally generated reference voltage, Ni-Cd battery reliability. more than enough heat for the small and the difference causes a proportional If you've obtained the kit version, you components involved. current flow in the meter. The results are are only about one evening’s work from Following the parts identification and extremely good accuracy, dependent that same point. The kit is relatively location information, and the step-by- on the initial calibration, and a high simple to assemble, the instructions are step instructions, your Voltmaster will degree of stability. clear and concise. All of the components be complete before you know it. Cali­ Connections to the Voltmaster are are mounted on a single high quality bration is required, but the procedure is made through spring loaded connectors printed circuit board, and except for the simple and requires only a voltage on top, which may be readily changed as physical orientation on one integrated source, which can be simply a fully the need arises. The versatility of the circuit and a couple of diodes, only charged 4.8 volt battery, and an accurate instrument can be increased by having a correct soldering techniques need be voltmeter. The Voltmaster will be only as set of cables with the proper plugs to observed. accurate as this calibration step, so if at mate with your R/C system, as well as I will pass along a couple of sugges­ all possible, use a digit voltmeter for ending in small pins which can be tions learned from many hours over a this step. The whole procedure is clearly inserted in other connectors or placed hot soldering iron. When installing explained in the instructions, requires directly against the contacts of uncased components with printed-on identifica­ less than five minutes, and needs to be cells. The connectors are color coded to tion, or values, install them so the mark­ done only on 6ne range, the use of low minimize reverse connections, and it is a ings are up and visible for later checking tolerance resistors throughout assures good idea to also color code leads and in case of problem s. In the case of accurate calibration on all of the other cables. No damage will occur to the resistors, it is best to place them so the ranges. Calibration of the battery load Voltmaster or Ni-Cds in the event the color markings read from left to right, or function is automatic, and not otherwise leads are reversed. top to bottom, for the same reason. required. Though the Voltmaster is not exactly In the assembly of the Voltmaster, Circuitwise, the Voltmaster makes use delicate, all such instruments should be shrink tubing is installed in a couple of steps. . . you are instructed to apply heat with a cigarette lighter. Yeeck! For a NI-STARTER® neater and cleaner job, and for non- CHARGER N O W HAS L.E.D. smokers, use your Monokote heat gun. Power for glow plugs that fits in a shirt pocket! Later on, you are to secure the meter Fits any standard 1.5 volt glow plug. Stays on in the case; the recommended method plug, not in propeller! Locks onto plug using is to glue it in with silicone rubber. My Head lock® adapter. Rechargeable up to 1,000 choice for all such jobs is Sonictronics, times. Fits through cowlings. Charger and double-stick, “ Crazy Tape". It holds just instructions included. 90 day guarantee plus 9 as well, with none of that sticky residue month extended service warranty. Bank cards running out and getting into every place accepted. C.O .D .’s add $1.75 for it is not supposed to. Also, very impor­ shipping and handling. tantly, it secures instantly, no need to wait for any goop to cure. $24.95 And last but not least, when soldering See your dealer, or send this ad with order and to this and all other plastic case meters, get FREE SH IP P IN G ! U.S. only. use a heat sink (an alligator clip will do SERVICE nicely) between the solder joint and the 12421 Ransom Drive, Glenn Dale, MD 20769 · (301) 464-2260 meter case. This will prevent the melting MARCH 1985 93 things. Be careful not to get any kind of glue or cement into the engine system anywhere. S i ^Batteries Hot Line Cement former F-4 in place between the fuselage sides and add the two 1/16 by 1/8 longerons at the very top edge of the Save this new Hot Line phone sides. Now cement the firewall to F-4 after number to order or ask cutting some slight notches into the aft technical questions about surface of F-4 to allow for the engine re­ Call Monday to the finest R/C battery taining pins so the firewall can fit flush Friday between 9 a.m. packs made! with the former and the fuselage sides. and 2 p.m. Eastern time. We now accept Visa, Mastercard, Cement the bottom of the C 0 2 tank to the and U.P.S. C.O.D. orders. bottom cross piece of F-2. Send a self-addressed, stamped business At this point it is probably a good idea size envelope for full details. to try the engine and make sure it can be filled and run. Now add the fuselage top skin. The SR Batteries, Inc. Box287 Bellport, New York 11713 grain of the top skin should be crossways to the length of the fuselage. The aft bot­ ATTENTION V4 SCALERS airplane. And it’ll all be worth it, won’t tom of the fuselage sides are now brought it? · together at the extreme back end. They EPOXY GLASS COWLS FOR. will have to be cut away where the engine NOSER. PICA SID MORGAN. BALSA USA PLATT. CONCEPT FLEET HOSTETLER. RCM T-CRAFT. SHEBER P m S '/ , is V, system fuel line tubing loops near the en­ SCALE. SUPER CUB. FOKKER D-T. BOEING P-12. P-26 F4B2. gine, and for the engine cylinder head F4B4 SPARROW HAWK. GEE BEE MOD Ύ '. MACBRIENS TURBULENT. CHRISTEN EAGLE. BRISIGHELLA'S STARDUSTER Wheelair...... Continued from page 53 also. There w ill now be two roughly trian­ II. ·/· SCALE J3-B I BABY. FLYBABY AIRCAMPER PILOT gular shaped gaps between the bottom JUNGMANN I 3 5 SCALE Es OTHERS have a straight horizontal cut at the bot­ edge of the engine cowl and the lower aft WHEEL PANTS FOR: tom of the cowl from station F-3 aft. end in the fuselage sides. Cut and fit two CITABRIA STARDUSTER II. PITTS. SKYBOLT LIBERTY SPORT. CHRISTEN EAGLE P 6 E HAWK. STEARMAN STINSON SR-9. The firewall (engine mount), is cut from pieces of 1/16 sheet balsa to fill these gaps. MULLIGAN Es OTHERS 1/16 plywood. Note that its edges should Cut out two engine cowling side blocks BRAZED E> HEAT· TREATED WIRE GEARS & CABANES taper to match the fuselage aft contours. to fit aft of the firewall and install them LARGE SCALE PLANS AVAILABLE Attach the engine to the firewall, first mak­ and a rectangular piece of 1/16 sheet be­ Please send $1.00 for complete list. ing the holes for the three attaching pins. tween the firewall and the propeller. Now V ie supply Modelers with fiberglass parts lo r your Put the pins into the engine crankcase and carefully finish shaping the fuselage. Sand plans— Write or call us: push them through the firewall. Cut the the noseblock to a smooth rounded coun­ T ft D FIBERGLASS SPECIALTIES protruding pins so they extend through tour. Sand the bottom and top edges of 30925 BLOCK. GARDEN CITY. Ml 48135 PHONE (313) 421-6358 the firewall about a quarter of an inch and the fuselage to a radius as indicated bend them over to lock the engine tightly around the F-2 and F-3 body frame pat­ in place. Put a coat of model cement or terns. Carve the forward top cabin block to shape. Sand the aft engine cowling to treated wich care and respect, which epoxy over the bent pin ends. DO NOT fair with the firewall contours. involves not throwing them unprotected use any of the super glues for this. If any Now cut out the instrument panel form­ into the bottom of the toolbox. I found gets into the engine you have a disaster on er and install it in the front of the cabin my local camera store a good source of your hands! and add the 1/32 sheet combing on top of small leather or plastic zip-up cases, one Make the three body frames according it. Color the area forward and above the of which was purchased in just the right to the patterns on the plan. The uprights instrument panel flat black. Add the 1/32 size to hold the Voltmaster and its and the cross pieces are lap jointed at the associated leads and cables. corners rather than buffed to get more thick sheet balsa engine air inlet to the top of the fuselage. Actual use of the Voltmaster, as well as glue area at the joint. F-1 may be a little confusing on the plan. It is made exactly Give the entire fuselage assembly a some important information about the like the other two, but it has a balsa block careful sanding to get it as smooth as pos­ characteristics and idiosyncrasies of sible. Give it a couple of coats of sanding Ni-Cd batteries are included in the Ace forward of it which is later carved into the sealer and a coat or two of dope. Do the R/C instructions, and need not be forward top of the cabin and a block aft repeated here .. . with one exception; which helps hold the C 0 2 filler nozzle. same things to the tail boom plugs. the statement made therein that "it can’t Also the top cross piece of F-1 is deeper Cover the model with Japanese tissue. do its job if you leave it at home or in the than those on the other frames and will The original Wheelair 111-A was red and flight box” . Amen! later be partially cut away to accommo­ white. The basic surface color was white, date the filler. so the wing and tail surfaces of the model There is one caution however, for Cement the fuselage frames onto the in the photos were covered with white tis­ those of you still flying with alkaline sides and add the fuselage bottom panel sue. Movable surfaces and leading edges battery powered equipment. The Volt­ which is only forward of the wing. Hope­ of the wing and horizontal tail was red master can be used to test those batteries fully, the wing structure is already com­ and these were double covered with red also, though it’ll be a little tight on the plete so it can aid the fitting of the tissue on the model as were the vertical four-cell range. However, use the R/C fuselage bottom to the sides. Now rough fins, leaving white the horizontal stripes equipment itself as a load, and not the cut and hollow the block for the nose. on the two verticals. internal load of the Voltmaster. The Make sure it fits into the sides and bottom The registration "NX31223" is cut from drain is too high for alkalines, which are but don’t cement it in place until the nose red tissue. The letters are .8 tall, .6 inch designed for lower current drains. At the gear wire has been bent and installed in wide and have .1 inch stroke widths. They high drains involved, the cells will all test it. Fit the two blocks in the top of the for­ are doped onto the outboard wing panels, bad, and are also beingdrained at an un­ ward cabin, forward and aft of F-1. Cut the right top, and left lower surface. acceptably high rate. clearance required for the filler. Thread The fuselage sides below the windows Learning to use the Voltmaster is the engine assembly through the fuse- was painted white with pigmented dope. simple; getting to use it habitually might lage/former assembly and cement the The fuselage top and bottom, the tail not be. You might receive some inspira­ filler and its support blocks in place at F-1. boom assemblies, and the wing tips were tion from the knowledge that if used as AGAIN, DO NOT use any of the super colored with "Staedtler" red felt pen for recommended, this inexpensive instru­ glues here, they can easily get into the acetate. ment is someday going to save you an filler through capillary action and ruin Install thin clear plastic windows and 94 MODEL BUILDER windshield before the wing is cemented SCALE 1:6 PLANS to the fuselage. Final assembly consists of cementing [factor CURTISS JENNY BY RALPH BECK the wing to the fuselage, the tailbooms to the wing, and the horizontal and vertical tails to the tailbooms. Make sure every­ thing is done as accurately as possible. The original model tended to turn quite tightly to the left on its initial flight and re­ quired right rudder to correct the flight ! T pattern, so be careful not to get any left rudder bias into your assembly. It might also be advisable to only lightly cement AIR CIRCUS the horizontal tail in place so it can be shifted if necessary for pitch trim. SPECIFICATIONS. WINGSPAN 8 7 .2 3 IN A TRULY MAGNIFICIENT MOOEL AIRPLANE About 3/32 of washout is indicated in WING AREA 1410 SO.IN NOW AVAILABLE FROM PROCTOR: WEIGHT 9.5 lb s. A SET OF DETAILED PLANS. A STARTER the side view of the wing. This seems to ENGINE .80 & UP WOOD PART KIT. & A HARDWARE PACKAGE. work out OK on the model, and is also RAOIO 4 CHANNEL SEE OUR CATALOG FOR FURTHER DETAILS. about the way this wing structure tends to PROCTOR. BO. BOX 1333. LA JOLLA. CA 92038 For additional information, call (619) 278-9000. or write. warp when the tissue is shrunk and For a complete 40 page catalog, send S2.00. doped. If your model turns out with sig­ nificantly more or less washout or if the two wings differ, warp the wings in the heart of a hair dryer or over the stove to J.C. TIMER (0-l5min) match the plans. (If you do it over a gas stove, keep a hand between the flame and Π Μ I V

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 95 national... the oldest and most distinguished of all aviation magazines... Aeroplane Monthly is a mine of infor­ mation for the aero historian, an ency­ clopedia of facts and photos for the avaiation student, and an unrivalled source of three-view drawings for the modeler and artist. "Top class aviation writers, test pilots, and aircrew take the reader back in time as they describe the experiences, the men and the machines behind the British, US, and World aviation history. They examine the development of aircraft from World War I to the Korean conflict. They enable the reader to follow the pioneers... and to discover, for example, what it was like to pilot a Moth or Percival Cull over the Alps, across the Sudan or the dreaded » turned out many of the Bill Bames adven­ Timor Sea; to operate Wapitis o r D.H. 9A's tures. On the wall of the den can be seen in the Himalayas or the burning deserts, the original full-size oil painting for the or to do a plug change dangling over the November 1934 issue by Frank Tins­ waters of the Nile on an Imperial Airways ley... of the "Scarlet Stormer!" Empire Class flying-boat. They vividly re­ Bud presented to Mr. Verral a Bill Barnes live war experiences from the jungles of Air Adventurer T-shirt, which he happens Burma to the dirt and steel strips of World to have available in Small, Medium, Large War II Europe. They journey back to avia­ and Extra Large at $11.50 postpaid (Bud tion's earliest years to interview pioneers Overn, 1043-C, E. Chapman Ave., Orange, like Sir Thomas Sopwith, then come right CA 92666) Cal. residents add 6% sales up to date and dig out hot news stories JEX SUPER FLEX HEADERS tax. You can also obtain a Silver Lancer and snippets of aircraft preservation infor­ These durable stainless steel headers rubber stamp for $8.45, postpaid from Ge­ mation for the grapevine section. allow freedom of engine placement. You orge Ardwin, 60 Ely Ave., Box 56, Sabina, "The current issue includes a full-scale can turn and twist to get your exhaust OH 45169. report on Oshkosh 84, with pages of ex­ precisely where you need it. Great for MISLOCATED clusive photos in color and black-and- helicopters, powerboats and unusual de­ In Bill Simpson's report on Pattern at the white; a 'preservation profile' of a Focke- signs. Pressure tap included. Designed to Wulf Fw 44j Stieglitz: 'Wings of Peace'... fit the popular Japanese engines (O.S., '84 Reno Nats, he somehow moved Chip Enya, Y.S.), they also match up well Hyde from Yuma to Tucson, Arizona. Wait a series on between-the-wars airliners, w ith num erous oth er engines (see hole Hustedt writes to say that he and other and many other features of the kind which center dimensions). Side-exhaust head­ "Yumans" are proud of young Chip, and make Aeroplane Monthly unlike...and ers feature a 10° rake-back. Rear ex­ would like to have him back. unequalled by... any other aviation haust types have a 20° up angle. OK...we just beamed him over...He's journal. H ole Size Centers Length Price yours again! "Annual subscriptions in the USA are .20 SE 1 -3 /8 " 5 -1 /4 " $ 1 6 5 0 DEBONDER OFFER $25 (airfreight service) or $45 (airmail), .20 RE 3 1 /3 2 " 5 -1 /4 " 16.50 For a limited time, Pacer Technology & obtainable from John Barrios, Business .40 SE 1 -1 /8 " 5 -1 /4 " 17.50 Resource, Inc., Campbell, California, is Press International (USA), 205 East 42nd .40 RE 1 -1 /1 6 " 6 " 17.50 offering a free 1/3-ounce bottle of its Z-7 Street, New York, NY 10017.” · .60 SE 1 -1 /4 " 6 -1 /4 " 19.95 .60 RE 1 -1 /4 " 7 " 19.95 Debonder to every purchaser of a one- ounce bottle of Slo-Zap/CA. Slo-Zap gives CONDOR HOBBIES you up to two minutes to get loose parts T. O. C...... Con tinued from page 13 17971 Sky Park Circle, Unit "D " in perfect alignment before it locks every­ Irvine, CA 92714 thing in place. "It's a high viscosity, maxi­ Telephone: (714) 250-1425 Dave Brown, USA mum gap filling, maximum fillet forming, Handling Charges: Douglas Ferguson, USA slow curing cyanoacrylate adhesive that is C.O.D. & Credit Cards - $4.75 Tony Frackowiak, USA Prepaid Order - $ 2 .5 0 well-suited to large surface area jobs such Steve Helms, USA as wing sheeting, laminating sections, Gunter Hoppe, West Germany fuselage doubler construction, and many Dean Koger, USA that appeared in the magazine of that title more." Ivan Kristensen, Canada and which later became Air Trails! Z-7 Debonder removes cured cyanoa­ Wolfgang Matt, Liechtenstein Bud Overn, of Santa Ana, California, crylates from skin, work surfaces, and Giichi Naruke, Japan sent us the above information, along with fabrics. It's odorless, non-flammable, will Hanno Prettner, Austria a clipping from the New York Times, in not craze plastics, and comes in a safe, Steve Rojecki, USA which there was a story about Verral's water-based chemistry. Try some while it's Werner Schweiker, West Germany 80th birthday party, with a Bill Barnes free! Steve Strieker, USA theme, that was put on for him by some AEROPLANE MONTHLY Jeff Tracy, Australia of his friends. Guests were dressed in The following is a PR release that Dave Wilson, USA '30ish attire or aviator outfits. Slides of should interest aviation and scale model Tsugutaka Yoshioka, Japan magazine cover paintings by Frank Tinsley buffs. In addition, the following alternates were flashed on the wall. Suspended in "Britain's leading and oldest established were invited and were on hand: the atrium of the host’s town house was a journal for all aviation and aeroplane en­ Jim Kimbro, USA giant Bill Barnes airplane, and a live, thusiasts, Aeroplane Monthly, is launching Michael McConville, USA radio-style reading of a never broadcast a drive to awaken US aero buffs to the Franz Mayr, West Germany show was performed by his friends and many features it offers that are unmatched neighbors. by any other magazine. The aircraft flown by the contestants Mr. Verral still writes in the third floor "Published by Business Press Interna­ varied from the popular Laser 200 to Steve den of his home in New York where he tional, and a sister journal of Flight Inter­ Strieker's "PT-17," an ancient design that is 96 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER definitely not a contender in full scale aer­ obatic competition. The Director of the 1984 Tournament of Championships was Mr. Phil Kraft (USA). NO TIME TO BUILD? Phil's invaluable experience includes both TRY OUR “OLD TIME" F/F-R/C AIRCRAFT R/C and full size aviation. He is a former landing gear · pre-mounted tail wheel National and World Champion and form­ assembly · keyed stab for easy er T.O.C. competitor, as well as a designer, m o u n tin g . builder, and pilot of the well known "Su­ FULLY FRAMED — UNCOVERED per Fli" aerobatic airplane. Phil is prob­ (Add $8 00 (or shipping and handling) $174.95 ably best known around the world as the PARTIALLY FRAMED KIT founder of Kraft Systems, manufacturers of (Add $3 00 for shipping and handling) $79.95 radio control equipment. Chief Judge for this as well as all past DIRECT SALES ONLY Tournaments was the genial Dr. James M. KLOUDKING BEEHIVE R/C MODEL CO. "Doc" Edwards (USA). Doc's career in R/C Replica of 1938 F/F model modeling spans over thirty years; he has Box 744, Layton, UT 84041 • 72-inch span *.2 9 to .40 engine size competed successfully in R/C aerobatic N O T E : Utah residents add 5 75%sales tax • 2-3 channel operation · pre-bent AII aircraft shipped UPS C. O. D. s Welcome. competition and presently owns and flies a full size Pitts Special. The other judges were: while also trying to gauge the compe­ INDOOR MODEL SUPPLY Steve Nelson — USA tition, ended after three rounds with the 13" MINIATURE SCALE AIRCRAFT KITS ea $6.95 Geoff Franklin — England following standings: OUTSTANDING DETAILS. 3-VIEWS & HISTORY Henry Haigh — USA 1. — Kristensen — 13,581.90 ZIPPY SPORT A.R.V. AERONCA K 1937 Dave Lane — USA 2. — Rojecki - 13,579.39 Isao Matsui — Japan 3. - Strieker - 13,429.24 Travis McGinnis — USA 4. — Matt - 13,340.30 Don Panek — USA 5. - Schweiker - 13,252.20 Gordon Price — Canada 6. — Koger - 13,228.71 LaMar Steen — USA 7. — Frackowiak — 13,143.60 Bill Thomas — USA 8. - Naruke — 12,861.70 Bob Upton — USA 9. - Akiba — 12,834.10 William C. Weaver — USA 10. — Helms — 12,803.40 The flight maneuvers are all stated in 11. — Brown — 12,549.70 the rules, and are based on the inter­ 12. — Hoppe — 12,468.40 national "ARESTI" schedule for full size 13. — Bonetti — 12,400.74 WATERMAN RACER 1921 aerobatic aircraft competition. For the 14. - Britt — 11,333.30 Light Sheet T.O.C., the schedule is broken down into 15. - Mayr — 10,677.20 .045" Strip Wood Japanese Tissue four different programs: Known Compul- 16. — Yoshioka — 10,152.20 Hardware & Prop sary, Free, Unknown Compulsory, and 17. — Bertolani — 9,639.63 Heat Transfers Four-Minute Free. 18. — Ferguson — 9,540.10 PLASTIC CYLINDERS The 1984 Tournament Of Champions 19. - Tracy — 8,392.89 was not without it's surprises. The first 20. - Wilson - 7,915.71 THE TIME MACHINE PENNY THE EASY 8 1/8 OZ PLANE shocker came when the news was re­ The first day's results are studied with 18 Span\^ leased that Hanno Prettner's Steen great interest by contestants and spec­ "Skybolt" aircraft did not meet the rules tators alike, as this is the first indication of and that Hanno would not be flying this the possible outcome. Though everyone year. This was the subject of much dis­ knows that it is still early in the game, and cussion by the multitude of spectators, most anything is still possible. The first many R/C flyers themselves, and of course five places, the big money winners receive a variety of opinions were heard. In gener­ special attention, and the low difference, al, it was utlimately admitted by everyone 2.51 points between first and second that rules are rules, and that they have to places is noted. Nor is the difference that $6.95 RON WILLIAMS BOOK ON apply equally to everyone. great between the others of the top five; INDOOR MODEL AIRPLANES $14.95 Franz Mayr, from West Germany, Inter­ 150 points between two and three, and 88 272 pgs —over 300 illustrations national Alternate, was entered as the next between three and four, and between four we ship next day postage paid with free plan PEANUT POWER by Hannan. 80 p q s $8 S eligible. and five. The first seven places have all ac­ INDOOR BALSA PACK $6 95 P-NUT PACK $6 S The second surprise came on the morn­ cumulated over thirteen thousand points, JAPANESE TISSUE 10 Ige 5 col roll $5 S CONDENSER PAPER 27$2.50 MICROLITE $3.2 ing of Thursday the 8th, the first day of while all through thirteen have over twelve RUBBER LUBE $1.00 BALSA CEMENT $1 5 competition flying, and it came in the thousand points. We are all anxious to see THRUST BEARINGS. Mini Dual or Dual $1.C form of wind! Twenty-five miles per hour, what tomorrow brings...and those of us PIRELLI RUBBER .020 to 090” $2.3 6:1 WINDER $3.95 16:1 MARK 1 $11.S with gusts up to thirty-five, the radio said. who are not in this Champion class P-NUT CO-2 ENGINE $34 95 CHAHGER $8 £ We did not need to hear the radio reports, wonder how, or if, they sleep! P-NUT PROP PACK 4 props, shafts, w.&p. $2.S as we felt the cold wind and lost hats and Saturday, the second day, proceeded ADD 10% POSTAGE-MINIMUM POSTAGE $1.! 1983-4 CATALOG 18 ILLUST. PGS. $1.50 everything else that was not tightly se­ pretty much like the first, good weather cured. We all knew that it was too windy and more terrific flying. There is more BOX 39,GARBERVILLE, CA 95440 for safe flight. pressure on the contestants though, as The next morning, things started EARLY, they know that today's performance if cru­ where applicable. as flying was scheduled to start at seven cial and will determine the standings. The 1. Strieker — 14,535.14 (Biplane) A.M. in order to try to make up the lost top five w ill fly tomorrow for the big 2. Rojecki — 14,373.52 (Biplane) day. A little wind made many of us fear for money; places six through twenty will be 3. Kristensen — 14,241.70 the worst, but it soon calmed and we en­ announced at tonight's banquet and for 4. Hoppe — 13,864.50 joyed a comfortably cool day and similar them the 1984 T.O.C. will be over. The se­ 5. Matt - 13,855.50 for the remainder of the weekend. cond day's flying, after three more rounds, 6. Frackowiak — 13,805.90 — $5500 The first day of hotly contested flying, resulted in the following standings, with 7. Schweiker - 13,574.50 — $5000 with everyone obviously trying their best points and prize money as indicated 8. Koger - 13,498.31 - $4500 (Biplane) MARCH 1985 97 In actuality, only nine biplanes flew; other contestants, Ivan Kristensen amongst them had brought one, but expecting more of COX HOBBIES the high winds experienced at the start of the weekend, opted to fly their mono­ The NEW ERA of COX is now — plane as they are supposedly less affected And with this new era by the high winds. As it turned out, under continues our tradition of the prevailing wind conditions, and with producing and delivering exciting, the pilots present, there is no doubt that innovative, high quality hobby the biplanes dominated the field. For ex­ products. Available ample, had Kristensen flown his primary entry, a Starduster, assuming of course, the at hobby dealers same scores throughout, he would have everywhere. garnered a total of 18,021.41 points... No. 170 .049 TEE DEE more than either Rojecki or Strieker. Con­ Competition Racing Engine versely, had the latter two been flying Cox Hobbies, Inc., 1525 East Warner Avenue, Santa Ana, CA 92705 monoplanes, their final scores would have A Subsidiary of Aeromil Engineering been 15,805 and 15,404.07 respectively, therefore dropping them down to third and fourth places. P questioned by anyone, as the Super Chip­ Conjecture will continue of course, as munk entered by Mr. Naruke was flaw­ there are enough proponents of both sin­ V - 1 H oobby b b y HHorn , lessly constructed, painted, and gle and double-wing design to keep the decorated. discussion going. It will be interesting to The significant changes after two days of see what occurs at the next Tournament Old Timer - \ flying are the switching of positions one ...as well as to see whether Hano Prett- f i a m and three; second place remained cons­ ner w ill continue in this class of compe­ < P & < W tant. After that, with the exception of tition and if we will once again see him flying in the skies of Nevada. aa'V\odz[ eStraicc Frackowiak in seventh place who moved 1938 Record B reaker. 96". .4 0 - .GO 4 Strokes $65.00 up one notch, everyone seemed to slip Airfield entertainment included flight 1938 Kloud K in*. 63". .1 5 -. 30 Glo/4 Stroke $43.00 one or two places, with some reposition­ exhibitions by the "Eagle Aerobatic Flight 1941 Berkeley Brigidier. 56". .049 . 15 Glo $36.00 1941 Super Quaker. 78". . 40 .45 4 Strokes $74.00 ing down towards the bottom. The most Team," flying their colorful 260 horse­ 1936 Uuccanoer- 84" -$51; 1938 C lipper MK 1-72”—$39 important change of the day was Gunter power Christen Eagle I unlimited compe­ 1937 Dnllaire Spte’er 108" $63. 50;1940Ki.ngex-46L $27 tition biplanes. The team, comprised of 1939 Mercury - 72" $56; 1935 Miss Am erica-84" --$59 Hoppe, who took a giant step for the Ger­ 1941 Playboy Jr. 54" $29; 1941 Playboy Sr.- 80" $46 mans, moving eight places, from twelfth to Charlie Hillard, Tom Poberezny, and Gene 1938 Pow erhouse-84" $45.50. 1940 Snilplune-78"--$74 1940 So Long-50" $28; 1938 Trenton T error-72”-$32 fourth. No one, least of all the contestants Soucy, each a champion in his own right, 1939 Zipper 54" $48; 1939 Korda W akefield-44" $17 can say that any of the preceding days flies an exciting program of wingtip-to- These kits qualify for SAM events (FF & K/C). and wingtip formation maneuvers that has the feature highest quality machine cut i> Handed parts have been "little"; but tomorrow is certain­ (Superior to all the Competition), all sheet and strip ly the "BIG" day! crowd alternating between wild applause wood. wire. i> window material. Plans arc the orig. FF, but the models arc easil^:onvertible to 3eh R/C. Sunday morning dawned clear and and gasps of awe. Kits for Gas and Electric/Electric Systems > Acc. cool, with no sign of the winds that had Just as exciting, though flying a smaller 4k*s Buzzard Bombshell. 72” Span. R/C::FF $54.95 plagued and worried us on previous size of machines, are the flight demon­ 4K’s 70% Bombshell. 50.4" Span. R/C::FF $39.95 Hobby Horn Scnsoar G lider. 78” 05 Electric S1G.00 mornings. The pit area looks strangely strations by the Kalt R/C Helicopter Team, Midway Model Fast Eddie. Acrobatic/05 Elect $20.00 empty, as only the five finalists and their of Japan. Headed by Yoshiaki Nagatsuka, Midway Model Gnome R/C Hand Launch Gild. $34.95 Leisure Playboy Sr LT-50 Geared Electric $30.00 airplanes are present. There is a different the team performs all manner of near im­ Jolly Electric us Glider for 05/LT-50 Electric $32.50 Astro Cobalt 05 System (7 Cell) Direct $112.00 atmosphere at the field... it is time for the possible maneuvers, including a seldom Astro Cobalt Geared (2 to 1) System $147.00 flyoff, truly the nearest thing in Radio Con­ seen rotor-to-rotor hover of two machines, Leisure LT-50 Direct (6 Cell) $40; 7 Cell is $50.00 Leisure LT-50 Geared (2.5 to 1. 6 Cell) $65.00 trol to the Moment of Truth. The contes­ one of which is inverted at the time. The Astro Sport (improved) for 05 Direct $18.00 tants check and recheck their equipment, helicopter team's flying was also much en­ Leisure Wasp LT-50 Sport/A erobatics______$23.00 talk over the flight maneuvers with their joyed and appreciated by the crowd. SHIPPING & HANDLING: 64 Page CATALOGUE Up to $8.00 add $1.50, $2.00 PP/ 1st Class helpers, study the sky, take that nervous The crow d...it is hard to believe that an $8.01 to $20.00 add $2.25. A copy will be sent $20.01 to $45.00 add $3.00. free -whun requested- walk to the bathrooms, till finally, the offi­ event such as this, that is not open to the $45.01 to $70.00 add $3.SO. with mi order. cials call the first flyer, we hear an engine general R/C public, can generate such and over $70.00 add $4.00. HOBBY HORN CA Addressees add 6% tax. 15173 Moran St [B | and the first airplane takes to the air... to widespread interest. But it does! To see Send MO. Visa/MC( ·♦ E x p ). P .O . Box 2212 fly for $30,000. the best of the best fly, spectators were or Check (allow up to 30 W estm inster. Ca 92684 days for CK clearance.) (714) 893-8311 After six hard-flown rounds...and a lot present from all over the world, I personal­ COD Exact C harges plus of suspense while the final scores are ly spoke to fliers from South Africa, New $1.50 Hdl. (Cash Only) tabulated, the five finalists are announced, Zealand, Argentina, as well as to countless points and prize money as indicated: Europeans. All here to see "toy" airplanes; 9. Brown - 13,437.10 - $4000 1. Rojecki - 17,385.65 — $30,000 isn't ours a wonderful hobby? 10. Naruke — 13,151.20 — $3500 2. Strieker — 16,944.49 — $15,000 The Circus Circus Tournament of Cham­ 11. Akiba - 13,148.20 - $3000 3. Kristensen — 16,383.10 — $10,000 pions is held semi-annually, on alternate 12. Helms - 13,057.80 - $3000 4. Matt — 16,178.10 — $6500 years with the FAI World Radio Control 13. Wilson - 12,869.02 - $3000 5. Hoppe - 15,177.60 - $6000 Aerobatic Championships. Thus the next (Biplane) In addition, Steve Rojecki also received such event w ill take place in Las Vegas in 14. Bonetti — 12,651.67 — $3000 (Biplane) the $5000 prize money for the highest November of 1986; Circus Circus Hotel 15. Mayr - 12,255.50 — $3000 placing biplane, and the 1984 Tournament w ill probably accept your reservations 16. Britt - 11,879.32 - $3000 (Bipla ie) of Champions is officially over. now! · 17. Tracy - 11,257.81 - $3000 (Biphne) Officially, but not actually, as there is a 18. Yoshioka - 11,112.30 - $3000 lot to talk over ye;t. One of the first sub­ 19. Bertolani - 10,205.53 — $3000 jects is the matter of biplanes. With the Choppers.... Continued from page 25 (Biplane) ten percent bonus to be gained by flying 20. Gerguson — 9,821.60 — $3000 a biplane, most of us expected to see "opened up" to the relative wind. See Giichi Naruke of Japan received the twenty bipes; ten percent is a lot to make Figure 4. Note the large angle between $5000 Best Model Aircraft Award, a up by flying skills alone, especially in a the plane of the rotor disk and the incom­ judge's decision that was probably not group of talent such as was present here. ing relative wind. This large exposure of

98 MODEL BUILDER the disk to the relative wind increases rpm NEW! Novak ALL'S QUIET ON CHRISTMAS MORN with SKY LARK EH-1 (or only a short time because the flare NESC-1 Electronic The "All-Electric" R/C Helicopter! JUST $189.95 also kills the forward airspeed, which Speed Control reduces the airflow through the disk. $200 Complete When the forward airspeed is gone, it's Just 2 oz. Replaces now back up to the inertia of the rotor the H-D wirewound controller, throttle blades to keep the rpm of the disk, and servo and airborne this is precisely where tip weights come 4.8V R/C battery. into play. The more tip weight you have the longer the rpm will keep up which makes the collective pitch "cushion" at w t Whisper quiet, makes no mess and costs just pennies to fly. So the bottom more effective. But going too stable you can fly anywhere, indoors or out. Comes semi- assembled with 2 powerful .05 electric motors already installed. far with tip weight will ruin cyclic 4k Just hook up the 22' tether cord (inc.) to 12V car battery for 1 hr. response and feel in normal flight, so run­ (before recharge) of stick time to trim out and practice. Optional ning blades of pure lead isn't the answer, airborne battery straps on when ready to solo off the tether. either... CONDOR HOBBIES The flare is so critical because it deter­ 17971 Sky Park Circle, Unit "D ", Irvine, CA 92714 - Tel.: (714) 250-1425 mines how soft ground contact will be. Handling Charges: C.O.D. - $4.75; Credit Card - $4.75; Prepaid Order - $ 2 .5 0 Flaring too hard will result in "balloon­ ing," where you're left at two or three feet with zero airspeed and zero rate of des­ slower, and the glide w ill be steeper. cent, totally dependent on rotor intertia to Because no two autos are alike, there cushion the descent that develops as rotor has to be a chance to "feel out" what the speed bleeds off. flare w ill be like. We do this by starting Not flaring hard enough will leave you the flare at about five to ten feet off the DIESELS with the ground still coming up at the ground, depending on conditions. The helicopter at the end of the flare, neces­ harder the wind is blowing, the lower the FACTS YOU SHOULD KNOW sitating adding pitch prematurely to help flare w ill be initiated. Gently give very BEFORE YOU BUY stop the rate of descent. slight aft cyclic, and watch for results. If AN ENGINE The amount of wind present is primarily there is no apparent reduction in the rate responsible for determining how easily of descent, flare a bit harder. Conversely, COMPARABLE POWER EQUATION the forward groundspeed can be reduced if there is a reduction in the rate of des­ to zero. With 10 knots of wind, the DIESELISED FOUR-CYCLE cent, wait a split second for more airspeed 2-cycle engine Glow engine groundspeed will be zero when the actual to bleed off before adding more aft cyclic. . 1 0 . 1 5 = .21 forward airspeed of the ship is 10 knots. This cross

MARCH 1985 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 99 portant because the 25 grams of lead out Eliminates GLITCH problems associated with long servo leads. there keeps things going no matter what the rest of the blade weighs. But it is still Eliminates need for voltage robbing chokes and other devices with to your advantage to get a heavier set of leads over 15" long ^ blades if you have a choice. Modern CMOS 1C technology OVERVIEW Uses less than 0.5 milliamps at 4 8 volts I hope this article has been successful in STOP Power lines are capacitor filtered conveying a practical, step-by-step ap­ Available in 4 versions with connector installed proach to do full down autorotations. It S10 95- Single Channel, single servo drive (Single) GS-1 was prompted by a scene this summer S12.95- Single Channel, two servo drive (Wye) GS-1 Y where a prominent flier was teaching S 14.95 - Two Channel, two independent servo drive (Twin) GS-2 another accomplished pilot (other than EMS S17 95-Two Channel, two servos per channel drive (Twin Wye) GS-2Y autos) to do full downs. The expert flier U«Ct*0·»·- VOOfi 4»5»€«Λ • Overall lead length is approximately 6 " to 8'' changed the setup for autos through the 1 * · Modeler must furnish own longer extensions as required back of the transmitter, then proceeded to SD ecifv R adio S' 00 Shipping and Handling on Pre-Paid orders, add do several beautiful full downs to check it μ ’ 6% for California residents. Mastercharge and Visa. out. All set, right? 6175 PALO ALTO DR., ANAHEIM, CALIF. 92807 (714) 637-2161 Although the trainee's machine was never broken, he (the trainee) tipped it over several times at the bottom of the ond nature, and you can easily use throttle auto until he got one to stay on the skids. hold, there's nothing left to do except go The mistakes? They were all classic. for the full down. Choose a day that has The expert flier had dialed in his normal a moderate breeze (4 to 8 knots), because negative pitch. OK for him, but way too the wind will make it easier to zero out radical for a student. Because of this, the the ground run. It is almost impossible to entries were violent, the descent featured damage your bird if you plop in from a overcontrolling on fore-aft cyclic, and foot or two as long as your touchdown is never got close to steady state. The flares This M t iy little glider is back and struttin* Its stuff. Per­ forms many delightful stunts. The all balsa "74" features the level, and there is little or no forward were very erratic because the trainee had famous A-J Steam Formed Cambered Wing and the "SLEEKURVE” Round Edged Fuselage Precise and authentic motion. never really practiced flares before, and printed detail from the originals, with fuselage and rudder Always do some practice autos first to there were quite a few close ones where printed on both sides We think you'll love It...... one of the American Junior “Classics". get a feel for the current conditions, then the throttle hold was snapped off at the

“74" Gilder Single Fuo-Pak $1.95 M mM C 1 H J I do it! If you've "done your homework," the absolute last moment before a total catas­ “74"3-ln-l Fun-Pak 4.95 MU RAK* full downs will almost be uneventful. But trophe. The more I think about it, it's a “404" Builder Kit 3.95 "404" Almost Ready To Fly lilt 5.95 P.O.Box 548 after you've done the first one you'll do wonder that the machine ever made it Oregon City, OR 97045 another, and another, and another...they through without sustaining serious See you» Hobby Dealer TODAY II not in Mock, they may order it lor you. II not. order direct PwUge and Handling Charges *300 lor Ihr Mnt model are fun to do! damage. (Pak · piu* I OH lor each additional. TIP WEIGHTS Approach autos with the respect of a All of my initial autos with the Cobra new challenge, learn the elements, and PRACTICE THE ELEMENTS were done with an unweighted set of don't go all the way until you do. Above Gain altitude, circle around into the stock blades. Each weighed 120 grams all, learn from others' experiences. I know wind, bring the throttle to full low ready to bolt to the head. With these I did. · smoothly. Maintain straight and level blades autos were good, but there wasn't upon entry and establish a steady state au­ any spare rotor inertia at the bottom. If the torotation in the descent. Flare high at first flare was not timed perfectly there was a Ferryboats... Continued from page 45 to get used to what the flare does. At the tendency to "plop in" the last six inches. end of the flare, increase throttle/collective Nothing serious, but you could tell that for a power recovery and go around again. the disk was done flying at that point. ty's Staten Island Ferryboats have trans­ Don't use throttle hold at all. As you get Robert Gorham can do beautiful (what I ported about one billion passengers a used to the autos, make your power recov­ call kissy-kissy) full downs with the same total of five billion passenger miles eries lower and lower. After a while you'll combination, but it's due to the added ro­ without a single accident-caused fatality. be able to bring the power in and termi­ tor rpm that comes with running much In addition, the ferry boasts a 95% on- nate the auto six inches to a foot off the more negative pitch. Again, we're not after time record and the commuters, especial­ ground. Practice these power recovery au­ that style of auto, especially for the pilot ly, appreciate this amazing accomplish­ tos until you feel perfectly comfortable who is new to them. ment. with the entry, descent, and flare. While To help with the inertia of the blades for Actually, ferry service between Staten Is­ you're doing this, learn to judge the glide the last six inches, I milled out a set of land and Manhattan is about three hun­ in various wind conditions, and note how blades and epoxied 25 grams of tip weight dred years old. The Leni Lenapi Indians the flare changes with differing combina­ in each tip. Each blade weighed 140 made their crossing in canoes, and by tions of wind and forward airspeed. grams, ready to go. I used HobbyPoxy For­ 1640, the Dutch and English settlers had LEARN TO USE THROTTLE HOLD mula One to secure the weight, then begun using flat-bottom raft-like boats for The next important step is to learn to sanded the excess epoxy off with a com­ ferrying passengers and produce. A public use the throttle hold before you ever go for bination of sandpaper and a file. The ferry service began in 1708, and in 1817 a full down. Set up for the auto at a com­ epoxy isn't the easiest thing to sand, but the first steam powered boat was placed in fortable altitude and enter by lowering it is strong, and does an excellent job of service. By the late 1850's, the double- collective, then snap the throttle hold securing metal to wood. If installed ended ferry was introduced. Although it is switch on. Continue the auto to about 20 properly, tip weight is not dangerous, and closer to New Jersey, Staten Island be­ feet. At this point give some aft cyclic to I have no hesitation to use it. I've used it came part of New York City in 1898, and break the rate of descent, and snap the for years in my Kavan JetRangers. Anyway, after a disastrous accident, New York City throttle hold off. You want to be able to this amount of lead turned out to be just assumed ownership of the Staten Island easily snap off the throttle hold at any right for beautiful, realistic full downs, giv­ Ferry in 1905 and promptly modernized time during the auto. If it doesn't look ing enough intertia to give soft landings the service with five new boats named af­ good, snap off the throttle hold and do it even if the conditions were not perfect. A ter the City's five boroughs; Manhattan, again. truly super combination. One final note Brooklyn, Bronx, Queens, and Richmond GOING FOR IT on tip weights: When you use them, the (Staten Island). After the elements of the auto are sec­ overall blade weight is not quite as im­ In 1937 three new ferryboats entered

100 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUI LDER service; Mary Murray, Gold Star Mother, and Miss New York. These 2165 gross tons boats set the pattern for all future Staten HOBBY CAPITOL Island Ferryboats, and could accommo­ COLLECTORS OF FINELY CRAFTED RC AIRCRAFT date 3013 passengers and 26 vehicles. The overall length was 267 ft. and maximum beam was 66 ft. A single 4,500 hp recipro­ SEND cating compound steam engine enabled $2.00 FOR the design to attain 18.5 mph, which was A COMPLETE LIST outstanding for a ferryboat at that time. OF CUSTOM AIR­ CRAFT · ENGINES The draft was 12.5 ft. A crew of 14 could PLANS · KITS operate these $925,000 vessels. As the population of Staten Island in­ 46N.OAK ST. creased during the post-war years, more VENTURA, CA ferry service was needed, which resulted 93001 in three more boats in 1951. The Pvt. Joseph F. Merrell, Verrazzano, and Cor­ (805)643-7616 nelius G. Kolf were designed to carry 3016 RENEGADE · 64 "SPAN · RHOMM RETRACTS · FAST passengers, and 40 vehicles. With an over­ all length of 290 ft. and a maximum beam Legion, with the Verrazzano in standby of 66 ft., each 2285-ton ferryboat was po­ service. Of all the Staten Island ferryboats, wered with a single 4,000 hp Skinner the one which remained in operation Uniflo steam engine, with which it at­ longer than any other was the "grand old tained 18.5 miles per hour. These lady" Miss New York; veteran of 38 years $2,190,368 vessels were operated by a of service with the World's Most Famous crew of seventeen. Draft was 15.5 ft., Ferryboats, and one which truly contribu­ which proved a bit deep for the shallow ted to that fame and earned that coveted water at the terminals. title. Three more ferryboats joined New York Model Builder w ill publish a construc­ City's Staten Island Ferry fleet in 1965. tion feature for an 1/8-inch to the foot These were the John F. Kennedy, Ameri­ scale, or 1/96 size model of the "grand old can Legion, and Gov. Herbert H. Lehman, lady" of Staten Island Ferryboats, the Miss designed by the firm of Kindlund and New York, complete with ferryboat slip Drake. The new boats were 294 ft. long and terminal. Don't miss it! overall, with a maximum beam of 69 ft., ACKNOWLEDGEMENT and could carry 3,533 passengers and 45 The author extends his sincere appre­ vehicles. These 2109 gross tons vessels ciation to the Honorable Edward J. Koch, were the first Staten Island Ferries to be Mayor of the City of New York, and powered with diesel engines. In fact, four Leonard Piekarsky, Assistant Commis­ diesel generators produced electricity sioner, New York City Department of which was directed to eight electric mo­ Transportation, Bureau of Ferry and how the air was shaping up, and as a tors; four geared to each propeller shaft. General Aviation Operations, for their as­ result, the last 15 minutes of the allotted These were the only Staten Island Ferry­ sistance by providing technical and histor­ time was buzzing with activity. boats not fitted with a single continuous ic information as well as photographs The beginners were having a heck of a shaft running through the vessel and con­ which were most helpful during the time coping with the stress of competi­ necting both propellers. This 6,400 hp preparation of this project. We also thank tion. Many had experienced fliers launch powerplant drives the $3,884,000 ferry­ Roger T. Crew, Jr. and The Mariners' Muse­ their planes for them. At least three or four boats to a speed of 18.3 mph. A crew of um, Newport News, Virginia. · of these beginners had flying coaches call­ 14 operates the boats which have a draft ing out verbal instruction over their shoul­ of 13.5 ft. ders. This caused some added confusion The construction of the Verrazzano as coaches would say for instance, "Give bridge across the Narrows between Staten El Primero. . . Continued from page 27 it some down," and the bewildered flier Island and Brooklyn diverted considerable would pull "down" on the transmitter vehicular traffic away from the ferryboat koted glider. There were many others in stick, making matters worse as stall after service, however, the pedestrian traffic the bunch that were worthy of mention, stall ensued. If it weren't so serious and continued to increase and the demand for but the prizes were limited to three. the threat of crashing so real, it would this glorious five-mile ferryboat ride re­ Round One of the contest was a three- have been funny! As it was, many crashes mained. The ship designing firm of minute duration with runway landing. The did happen, but in almost all cases, the George G Sharp Inc. designed the next runway was, in my opinion, a little on the damage was very minimal if there was any Staten Island Ferries, the Andrew J. Barberi small side and was very hard to hit. The at all! and Samuel I. Newhouse. The author, as pilot had to make his approach from the This last observation should really be the Chief Draftsman of George G Sharp downwind side through qualifying "gates" noted. The El Primero design is very Inc., was involved in the design of the new in an effort to make the landing more TOUGH! I saw guys tripping on the loose boats. Because of the drop in vehicular "realistic" or scale-like. For this last item, ends of the crowd control rope and falling traffic, the new 3,335 ton ferryboats were the pilot earned a 25-point landing. He on their models, crashing into trees with designed to carry 6,000 passengers, but earned an additional 25, 50, or 75 points horrible sounds coming from deep inside no vehicles. With a length of 310 ft. overall for landing within the marked runway. the foliage, hitting power poles, fences, and a maximum beam of 70 ft., these ferry With the gentle breezes blowing a little bit and each other; models did cartwheels on boats are powered by four diesel engines sideways to the centerline (about 10 to 20 the ground and dorked away with glee, geared to a continuous propeller shaft, de­ degrees), the final approach was a real BUT in all the mayhem, only one plane veloping 7,000 hp and can attain 20 mph. trial of a pilot's landing skills. I believe suffered major damage...the fuselage A 15-man crew can operate these there were less than a dozen landings wi­ broke in two after a very steep dive into $30,100,000 boats. thin the runway for the three rounds. the ground. Surely this contest was the Today, six Staten Island ferryboats re­ The air during the first round was fairly acid test of the durability of the El Primero main in active service: The Barberi, New­ calm and void of any strong lift. The open design. Yours truly joined in the fun when house, Lehman, Kennedy, and American flight order caused many to "wait and see" he hit the power lines at one end of the MARCH 1985 101 PLANS CATALOG IllUSTAATCD LISTING OF MODCL BUILDER PLANS

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

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

No. 175 O.T. FLYING QUAKER $5.00 First gas model kit by Megow, 1937. Span 7 ft. Redrawn by Phil Bernhardt.

No. 4751 R/C AUTOGYRO $4.00 Semi-scale twin rotor R/C autogyro for .35 engines. Very stable. By Skip Ruff.

No. 2751 TOP SLIDER S4.00 R/C Slope Racing glider. W ill sport fly in light winds without ballast. Ken Willard.

No. 4752 OKIE BIRD $4.00 Red hot Class A/B free flight. Plans show sub fin and rear fin types. By Jim Clem.

No. 2752 CUT LESS S3.00 Half-A R/C Pylon Racer for 2 ch. radio. Elevator and aileron. By Dave Katagiri.

No. 3753 GROOVY TUNA $3.00 No. 475-O.T. G.H.Q. SPORTSTER $5.00 Top-notch Wakefield design from 1973- From July 1936 M.A.N., also kitted by 1975 FAI U.S. team member. Jon Davis. G.H.Q. By Louis Loutrel. Phil Bernhardt.

No. 2753 FORD TRI-MOTOR $3.00 Super-light rubber scale model of famous Tin Goose, 32’/S" span. By Tex Newman.

No. 275-0-T. MYSTERY MAN S6.00 No. 375-O.T. 1936 WAKE WINNER $3.00 No. 5751 FLEET BIPLANE $5.00 Famous E lbert W eathers Class C gas job. Englishman Albert A. Judge's Wakefield Fast-building 2” Sport Scale R/C model Used takeoff dolly. By Phil Bernhardt. Cup design. Redrawn by Phil Bernhardt. of famous 1930 bipe. By Romey Bukolt.

(Page 9 of series) 102 MODEL BUILDER No. 7753 ULTRA DART $2.00 er. for 1/2A R/C pylon. Jerry Holcomb. Monster 39" span Delta Dart for sport and Unlimited Rubber. Dave Linstrum.

No. 6753 SHRIKE $3.00 Hot Half-A free flight, with good looks, and top performance. Bill Langenbs*rg.

No. 5753 GREMLIN $2.75 No. 775-O.T. BOMBSHELL 54.00 Sharp little Half-A C/L Stunt model. W ill Famous w inne r o f Class C gas at the ‘40 do complete schedule. By Tom Dixon. Nats, by Joe Konefes. Phil Bernhardt.

No. 675-O.T. DIAMOND DEMON $3.00 Popular .020 Replica of Bay Ridge cabin Cl. B job. Span 34". By Phil Bernhardt.

No. 575-O.T. MERCURY $5 00 Designed by Ben Shereshaw. kitted by No. 8751 SOPWITH TABLOID 54.00 Scientific. 72" span. By Phil Bernhardt. Sport Scale WW I biplane for 3-channel radio. Span 42", .19 eng. By Chris Moes.

No. 6751 SQUARE HARE R/C $3.00 No. 8752 VOLKSPLANE 52.00 All sheet balsa trainer with long history. Great performing rubber powered profile· Span 52", .19 power. By Bill Northrop. scale. Span 24". By John Oldenkamp.

NO. 8753 F R IT Z . H LG

$ 1.00

A p y lo n style, high O < 0 performance H L G , w ith No. 6752 SKYFARER $3.00 No. 7752 THE ALIEN 5 2 .50 DT system. Rubber powered 1" scale model of trike Pendulum controlled flying wing pusher D iffe re n t! geared high wing cabin. By Earl Stahl. for Brown CO2 power. Daniel Walton Jim Parker.

MARCH 1985 (Page 10 of series) 103 hardly any damage done to the ship, but my ego hurt a little, so I paced off the dis­ FIVE BAGS of PEANUTS tance between the landing zone and the wires. The distance was 69 paces, oi about 50 to 55 yards. No way was I going to hit them again! There was one positive aspect of hitting those darned wires, be cause I was running over the seven-minute max, my time score turned out better thar it would have had I made my landing! The third round finished up at approxi­ mately 1:30 p.m., and more than one flier suggested holding a fourth round! This contest was obviously enjoyed by all. Sad­ ly, all good things must eventually end, and this event was now officially history. Awards were announced, pictures were EACH BAG FEATURES FOURTEEN PEANUT P U N S ------SEND $1.00 FOR LISTING & SAMPLE PLAN. taken, and several of the contestants and WALT MOONEY P.O . BOX 231192 helpers adjourned to the local Cocos res­ SAN DIEGO, CALIF. 92123 taurant for lunch. TOP SIX FINISHERS 1. Sam Niece...... 2396.72 durability of the El Primero, I might as 2. Dan Metz...... 2391.64 VINTAGE R-C FLANS well go over its flying characteristics. After 3. George Ritter...... 2355.48 that I'll get back to the contest, okay? 4. Dave Johnson...... 2277.94 The El Primero is a stable, gentle flying 5. Bill Forrey...... 2245.44 glider. Turns are graceful and controllable 6. Dave Ingram...... 2234.68 when the servo throws are kept at half-rate CLOSING THOUGHTS on the transmitter (or limited at the con­ A very heartfelt thank you must be es- 9 FT. WING SPAN trol horns). The glide slope (often called tended to the DUST club of Palm Springs, ALL RIBS 8 FULL FORMERS SHOWN ON PLANS 11 PLASTIC ENG.COWLS $ 9 .9 0 PR. L/D) is remarkably good, with long, flat and to Buzz Waltz for a contest that was CLEAR GUN BUSTERS $ 6.60 PR glides commonplace. Ability to thermal probably the most fun for the largest num­

4 l a r g e p l a n s h e e t s — Plans $1695 on lift that is light or strong is very good. ber of fliers in my experience. I will long 6 f t . WING SPAN MODEL P B Y -5 A Be sure to put washout in the wing tips remember this one! ENGINE COWLS « 6.50 PR. P|QnS $ 12 95 though, especially if you are a beginner, Some day very soon I would like to host GUN BLISTERS $ 4.50 PR ADD Ϊ2.50 POSTAGE or you w ill see a tendency of tip stalling. a one-design contest for the El Primero CATALOG-OVER 50 PLANS 11 0 0 D EALERS W R ITE Actually, this is true of all gliders with ... in fact, I'm going to make it my goal for 1985. So if you live within traveling dis­ WORLD WIDE tapering wing tips. For the purpose of the one-design con­ tance of the great LA "Basin," plan on at­ SID MORGAN test, no modifications to the model were tending. I w ill announce dates and 13157 ORMOND,BELLEVILLE, MICH.48lllu.SA. allowed. I would personally recommend locations later. Stay tuned! · the addition of spoilers. This isn't shown f L u n r f on the plans, but it would be a good idea for those who fly contests where spot landings are required. I came in too hot OS A A ...... Continued from page 17 on all three of my approaches during the contest and wished that I had spoilers to Best Static Display (Sig Mfg. Co.)—Jerry help kill that long, flat glidel Spoilers Gardner, Ft. Smith, AK, Pitts. would just make those tight landings that Best Civilian Aircraft (John & Donna much more predictable. LaComb)—Bob Nelitz, Greemore, On­ During Round Two, the sun really start­ tario, Canada, Clipped Wing Taylorcraft. ed to get warm. The breeze came up a lit­ Best Electric Powered Aircraft (Astro tle (2-5 mph) and the thermals started Flight)—Addie Naccarato, J-3. Along, wilhout· Scale·Kflp, popping. Not MANY thermals, mind you, Marathon of Flight—Harry Dickinson, another uncommonproject for next season I but some. A few lucky fliers found what Pomona, CA, Piper Tri-Pacer. T r * m . . . little thermal lift there was and went near­ Best U ltralight (Erich Dern)—Erich SW AN ISLAN D REI’U CATTONAi ly out-of-sight for five-minute maxes, but Dern, Panama City, Panama, Pioneer -l fo u most had 1-1/2 to 2-minute flights from the "Flightstar." W E T L A N D . Ο ίί£ Λ Ο Ι Ι 7 "J7&07-W&A HD hi-starts (myself included!). Longest Distance Traveled, Mel Barber, pour INPO m e F F T Round Three saw the wind pick up South Africa, Douglas DC-3. M e e t » s u iL tL T -«> irjtio u r ·.o ' . some more and the thermals virtually dis­ Best Glider Trophy (Roland Sommer) appear. Many seven-minute maxes were Roland Sommer, Germany, LS4. field and came crashing to the ground out recorded, however. There is definitely a lot of truth to the of control. Damage report: scratched There was a very nice wave forming over old saying that time flies when you are Monokote on the top of the canopy and a row of trees nearby which could be used having fun! In this case, when you arrive the bottom of the wing at the root. like a slope in the 5-10 mph breeze. Sever­ Thursday, with the long weekend stretch­ The one thing that kept running through al fliers took advantage of this meteoro­ ing out in front of you, it seems that you my mind as I witnessed all the could-have- logical phenomenon, yours truly among have all the time in the world to look been disasters was what John Cameron them, and recorded seven minutes on the closely at every one of the many airplanes Swayze used to say on those old Timex score sheets. This was the round where I present, to discuss ideas and techniques, commercials: "It takes a licking and keeps managed to fly into the power lines on my and to renew old acquaintances and pos­ on ticking." Nothing could be truer for the landing approach. I didn't even notice sibly make some new ones. But before El Primero. There may be better flying them until the plane came to an abrupt you know it, it's Sunday, you are taking two-meter gliders on the market, but there halt in mid-turn and fell out of the sky like pictures of the winners, saying goodbye to are none stronger! a dead leaf. I thought I was nowhere near friends old and new, and the crowd is be­ As long as I'm off on a tangent about the them! After the dust settled, there was ginning to thin out, as many start the trip

104 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Ace R/C Inc...... 87 INDEX TO ADVERTISERS Radio Controlled Models (RAMI .... 90 A dven ture M odel C ra ft ...... 101 R oba rt M fg ...... 85 A-J Fun-Pak ...... 68. 100 H obb y E n te rp ris e s ...... 66, 67 R ocket C ity Specialties ...... 95 Associated Electrics ...... 75 H obb y H o r n ...... 98 Satellite City ...... Cover 3 A stro F lig h t, I n c ...... 68 H obb y P roducts C o...... 72 Schlueter F/F Models ...... 87 A vis R a ra ...... 68 Ikon N'west ...... 70 Sig M fg. Co. In c...... 71. 87 Applied Design ...... 82 In d o o r M odel S u p p ly ...... 97 SR B a tte rie s ...... 94 Beehive R/C Model Aircraft Co...... 97 J.C. D evelopm ent C o...... 95 St. Croix of Park Falls, L td ...... 89 B rid i A irc ra ft Designs, Inc...... 81 K & B M fg ...... 87 S terling M o d e ls ...... 70 Byron O riginals ...... 4, 5 K&S Engineering ...... 91 Swan Island Replications ...... 104 Bud Caddell P la n s ...... 78 Kustom Kraftsmanship ...... 85 Tatone P ro d u c ts ...... 78 Campbell Custom K its ...... 72 Larry Jolly Model Products ...... 88 T8iD F ib e rg la s s ...... 94 Cannon Electronics ...... 76 Leisure E le c tro n ic s ...... 77 Technopow er II, In c...... 72 C.B. Associates, Inc ...... 96 M ackey's Tradew inds K ite C o...... 70 Teleflight Corp ...... 92 Circus H obbies ...... 73 M idw a y M odel C o m p a n y ...... 90 Uber Skiver Knives ...... 1 E r ic C lu t t o n ...... 92 M odel R e c tifie r C orp...... Cover 4 Buzz W altz R/C A irp la n e s ...... 8 2 Condor Hobbies ...... 88. 96, 99 Walt Mooney Peanuts ...... 104 Williams Brothers ...... 93 C ox Hobbies, In c ...... 98 Sid Morgan Vintage P la n s ...... 104 Wilshire Model C e n te r ...... 82 Jim Crocket Replicas ...... 85 Model Historical Aviation Society. . . . 3 W orld Engines ...... 89 Davis Diesel Developm ent...... 99 McDaniel R/C Service...... 93 Zenith Aviation Books ...... 69 D G A D e s ig n ...... 78 Model Magic Products, Inc...... 89 Du-Bro P roducts ...... 79 N ow len A e r o ...... 88 Electronic Model System s ...... 100 O ctura M odels ...... 86 F ly lin e M odels, Inc...... 76 Pacer Technology ...... 84 HOUSE A D S Futaba Industries ...... Cover 2 Peck-Polym ers ...... 78 B in d e rs ...... 107 Carl Goldberg Models, Inc...... 74 Pierce A e ro ...... 92 Full-Size Plans S ervice ...... 106 Golden Gate Hobbies ...... 80 John Pond O /T P la n s ...... 91 Illustrated Plans C atalog ...... 1 0 2 ,1 0 3 Gorham Model Products ...... 83 Proctor Enterprises, In c ...... 95 Oldies but Goodies (Back Issues) . . . 108 Hobby Capitol ...... 101 Racing W in g s ...... 76 Subscription F o rm ...... 108

IMPORTANT INSTRUCTIONS: Non commercial R/C STANDOFF SCALE PLANS WITH CON­ CLASSIFIED ADS (personal items) rate is 25 cents per word, STRUCTION MANUAL. Curtiss Hawk P6E. with a minimum of $3.00. Commercial rateis40 cents per word, with a minimum of $5.00. No Curtiss Goshawk F11C-2, Curtiss Gulfhawk 1A, advertising agency discounts allowed. Name and address free, phone number counts as two Stinson Reliant SR9, Stearman PT17, 1/6-Scale words, abbreviations count as whole words and w ill be spelled out. All ads are payable with $22.50,1/4-Scale $35.50. catalog $1.00 Richard order, and may be for any consecutive insertion period specified. Send ad payment to: G. Barron, 11506 Ohio Ava, Toungtown, AZ MODEL BUILDER Classified Ads. P.O. Box 10335, Costa Mesa. CA 92627 0132. 85363.

FOUR INCH METAL CUTTING LATHE. COMPLETE ENGINE KITS-Parts finished, WANTED: Information locating solid scale $87 25 basic unit Taig Tools 15048 E ready to assemble with instructions and wood model airplane kits, World War II. (Not Proctor Industry CA 91746 schematic. 049A radial mount of 049B lug profile, non-flying.) Eighteen inches maximum mount $6.95 each. Also auto or marine mount­ length F.A. Huff. 911 Georgia, Apt No. 4, Hun­ AERO CLUB OF ISRAEL needs your support ing brackets $1.00 each Auto or marine fly­ tington Beach, CA 92648 for aero-modeling activities. Send SSAE for wheel with universal joint set $5.00 each. Newsletter. Friends of the Aero Club of Israel. Brebeck Hobby and Sport Supply, 7 Marshall SEMI-KITS FABRICATED from your plans. Parts 147-02 B 29th Avenue. Flushing, N.Y 11354- Ave. Mohawk, NY 13407. cut from balsa, bass, pine, maple, and ply­ 1441 wood; custom sizes and shapes cut from your PLAN 'N PATTERN SETS: Save 50% on specs. Send SSAE for quotes, Model Wood WANTED IGNITION MODEL AIRPLANE building costs. Thirty great classic, R/C-Assist & Specialties, 4209 24th St.. Kenosha Wis. engines or parts circa 1930-46 Competitive Scale, including seven Giants. Send $1.00 (re­ 53142 prices Tom Forsythe. 31812th A ve. Box 141, fundable) for brochure W.E Technical Services, Box 76884-B. Atlanta, Ga 30328 TUPOLEV TU-2 plan, Russian WW2 twin New Glarus. Wl 53574; (608) 527-2066 engine bomber, 1/24 scale rubber free flight. $5.50 postpaid. SASE for complete list. David ADVANCED COMPOSITE MATERIALS— Diels, Box 101, Woodville, Ohio 43469. PLANS—Rying Scale Rubber or C 02, 5/8 Kevlar, graphite fiberglass, resin, foam, Kevlar in.=1 ft, Mustang F-51H, Spitfire MK XIV, Su­ cable construction manuals. Samples and data permarine Spiteful. Lockheed P-80B $5.00 ea. sheets sent on request. Free catalogue Ad­ OFFER OF THE YEAR. Mail order hobby busi­ postpaid. Bell Model Aircraft, 650 Pinecrest Dr., vanced Composite Technologies. PO. Box ness with international reputation and clientel Largo, Fla. 33540. 24722-N. Baltimore MD 21220 (301-882-6051) Modest investment required for purchase of Name inventory, and mailing list or equivalent. P.O. Box 56, Armington, IL 61721. NEW! VOLUME TWO. SCRAPBOOK OF DESCRIPTIVE PLANS-LIST: 1930's super-scale SCALE. Plans. 3-views, and whimsey. $9.95 Racers, Classics, Sport models. $1.00 & SASE DRAFTSMAN Your plans drawn efficiently and postpaid. W.C. Hannan. Box A, Escondido, Vern Clements, Dept. MB, P.O, Box 608, Cald­ economically. 20+ yrs. experience with model CA 92025. well, ID 83606-0608. aircraft, boats. Manufacturers and publishers in­ quiries welcome. Send SASE include phone nr KITS CUT from full-size plans: R/C. F/F. BALSAWOOD: 1/2 Hobbystore price. SASE for and requirements for quote. C McArthur, 1080 U/C Plans listing $2.50 Repli-Kit. 1454 description and prices. Balsa, 7631 Shady- Ygnacio Valley Blvd . #10. Walnut Creek, CA Highway 41 North, Inverness, FL 32650 glade Ave, North Hollywood, Calif. 91605. 94598 HORTEN 229 TWIN 40 DUCTED FAN Model RAZOR BLADES: single-edge, industrial, first- PLAN ENLARGING. Blueprints to 9 feet from Plans. Other scale flying wings. $1.00 for cata­ quality — extra sharp; 100/$4.25. 200/$8.50; your plan or book page! SASE enlarging log. Bill Young; 8106 Teesdale Ave; N Holly­ 30Q/$12.50; 500/$20.50; 1,000/$4050. Postpaid prices Scale Plans and Photo Service, 3209 wood. CA 91605. in U.S. Cobbie's Gifts, Postbox 2, Deal, NJ Madison Ave., Greensboro, NC 27403. 07723; (201) 922-9898. WANTED: Model kits, glow engines ac­ ANTIQUE MODEL IGNITION PARTS. O.K. cessories circa 1945-1965. Rubber, control line 500 PLANS CATALOG Old Time Replica Plans, Herkimer, GHQ, Bantams, others. Timers, point (speed). R/C. boats, cars. Berkeley. Cleveland. Scale. Sport Rubber, R/C Old Timers, $2.00 sets, tanks. Listing $2.00 pp. Chris Rossbach, Harter's, DeBolt, Dooling. McCoy, K&B. Jetex. refundable. Allen Hunt Plans Service Box 726B. R.D. 1 Queensboro Manor, Gloversville, New etc. for cash. Bill Franklin, 170 Eastview Ave.. Dunbar WV 25064-0726. York. 12078 Crystal Lake. Illinois 60014 (815) 455-5926

MARCH 1985 105 FULL-SIZE PLANS SERVICE day morning. I always like to think think as to quite not like are Mondays always that I though, morning. day ekn pltn a ahn, hc he which machine, a piloting weekend Mon­ another of facerealities to the home CO his spent who builder model the for blue Q oc ID CO O Q Q FIRST! NOTIFICATION MOVING?SEND I - < ee a arln a QA' FyI must Fly-In QSAA's at airplane an tered tech­ R/C modern that maneuvers tricate in­ the through created,sweated overand have a little bit of Walter Mitty or Waldo Waldo or Mitty Walter of bit little have a en­ and brought Everyone who possible. makes now expertise own our and nology, h ognzto, se t b rlee so relieved be to asked organization, the rest. Bunker,deserved Pat Secre­Tomand o 285- T SI EX $ .00 $5 $3.00 X LE P IM S .T. -0 5 8 2 No. T H IG L R E IP H 2852 No. Pepper deep inside . . . and is richer for it. for isricher and . . . Pepper inside deep n wee edd l weed long. weekend all needed where and to only not year, this present both were they course Of activities. modeling sonal per­ their to time somedevote could they of beginning Treasurer the and since tary o 25 AI 00 .0 5 $ E P U O C IR A 2851 No. "Fly and Tell," but also to help out when when out help to also but Tell," and "Fly well a taking are pioneers working hard 106 o 15 BOBA $6.00 BCAT O B 1851 No. .00 $3 .00 $5 RAPER SC Y K S .T. -0 5 8 3 No. Y D .00 IR $6 B 53 38 No. Y O B Y A L P -A F L A H 3852 No. o 35 BUTERCUP S6.00 P U C R TTE U B 3851 No. Magazine include a reprint of the construction article, if if article. the article, of part were construction the instructions of building reprint a include Magazine Talking about old friends, two of QSAA'sof two friends, old about Talking l 5 t sa lsi. y al Plecan. Paul By classic. span ft. 5 , ild u b ienker. W live C spaa 16" bipe, gerwing Scale Peanut ooney M m fro up Scaled be sae popul talght stag­ t h lig ltra u r la u p o p f o scale ubber ond. R ichm R Stu . R/C ch. 3 span, " 5 4 to From J a a '41 A ir Trails, the sim ple-to- ple-to- sim the Trails, ir A '41 a a J From predecessor, d in ilw a T 's n a ittm W Steve al ' s Dsg b Cal Schmaedig. arl C by Design 's. 0 '3 early Holywood mve B Kn Johnson. Ken By movie. d o o w lly o H r o eynolds. 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Treasurer. as Wilms Dave and tary, i, ae Rx ad l o te te hard other the of all and Rex, Dave, tie, Las Tamalpias, 4731 Ve­ at Nettie contact 1985 Fly-In, the attending about or where, any­ on anyone to open information membership, QSAA for Anyway, hitch? eight an is year it them told anyone if wonder usin Atr n nulfe successencore? unqualified an After question: haveone only I members, QSAA working Net­ For 451-9983. (702) 89120; NV,gas, asSecre­Smith Nettie are Replacingthem mdln bdy f ie o Reader's to mine of buddy modeling a an for do you can what this, as such hr i Otbr 95 o e! · see! to 1985 October in there ht hy a dn wt m soy they story my with done had they what ad hy olnt remember. couldn't they said Dear Jake Dear Digest, but when I called and askedandthem called I when but Digest, . 14O.. KE $5.00 E IK M .T. 1184-O o. N o 181 MP $8.00 P AM H C A C N O R E A 10841 No. o 182 2MEE $6.00 ETER 2-M . B U L K 11842 No. o 1284- T S L G S5.00 NG -LO SO .T. -0 4 8 2 1 No. o 181 C PL S4.50 E N LA IP B ACO W 11841 No. S3.50 GOOSE A D A S6.00 N A C 12842 No. EE V 3.5 P LA N U D 12841 No. o 15 VI NG S6.00 G IN IK V 1852 No. J u ly 1995 1995 ly u J A classic, 2 in = 1 ft scale design fro m the the m fro design scale ft 1 = in 2 classic, A e ad lt f u fins wl be will friends, our of lot a and We, t d abelhere e h l e b la ld o h c tta A ered m odel as seen in 1940 1940 in seen as odel m ered l uma' 5 . o r w o p Jr. n row B ". q s 450 an's hurm S il G tach ol l re e h l e b la ld o h c tta A Schanche. Kare By ly l. o p tro n il, o c 'fo /E E-201 R glider. ing, w 2-M egian orw N ubr o rd owl B Pe Bruning. Pres By l. w fo ered pow rubber smpe 00o rd 3c. / scale R/C 3-ch. ered, .030pow ple. sim A Pub­ winner. Gas B Class Nats 0 '4 The scale e lik life Bostonian, off-beat real A iln t 9i pn y e illard. W Ken By span. in 29 ith w biplane nglehardt E ill B . 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For Over­ or For order. Airmail total f For o 25% mail. Class add U.S., 4th in Class or First 3rd includes Price o yi Aces. g in ly F - b FORNI DENTS ADO 6 SAE X A T ALES S 6% O D A S T N E ID S E R IA N R O IF L A C E REIG INSTRUCTIONS ORDERING NEW ADDRESS NAME CITY M O D E L B U IL D E R , , R E D IL U B L E D O M ahd Ps ofi wil f war cpe nesyou u o sent. y be unless t o n n copies at­ a c be rd issues a T S te U rw M fo t uplica o label D n ld o ill w postage. e service, t extra ffic p o m pay Post ro p For tached. effect. takes Jake ______Change of address notices m ust be received one one received be ust m notices address of Change m o n th before date o f issue tha t new address address new t tha issue f o date before th n o m hm ades cud ie to? rite w have you embar­ could Do I be t. address rin ould p w in home I a them see that to rassed basic so they're er lake: Dear er Shy:Dear s sa bbl. ht hud do? 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G ike M By ft. 9 Span design. co pn , ra s. n Lry lly. o J Larry glider. in. slope sq. r o 0 3 3 area LG H ", 7 /C 5 R Span titive e p Farr. m o C im T By . and eng 2-ch. -.19 r ,15 fo plane bat reflexes! com k ic /C u R q e p ty /L C atfl 96 aao Antque o Texa­ or e u tiq n A parasol 1936 eautiful B o rfom 39 Scoty' Mayors. ' tty o c 'S y B A F 9 /3 2 m fro er pow Thousand Oaks, Ca 90003 90003 Ca Oaks, Thousand 36 idn Way 1316 Winding Considered Things All L ig h tw e ig h t, easy O /T biplane fo r rubber rubber r fo biplane /T O easy t, h ig e tw h ig L oe o te oprtvl Lucid, Comparatively the for Home ls B s r 8- 0 -4 8 m fro T asO G /B A Class risley. W andy R area. 0 0 4 span, 0 6 plane: Thacker. ob B ol. 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Dear Ready to Quit: well on fuel containing five percent nitro. Why don't you take up something eas­ This engine, prop, and fuel combination ier. like watch repair. will run about five minutes. The altitude Jake gained with a Playboy will test your COVERUP! eyesight. ★ ★ ★ Sturdy, high quality, rich dark If you want a longer engine run, which Dear lake: green vinyl-covered binders for What's the secret (or success in the U- will result in a slower climb, exchange the Black Widow tank and backplate assem­ your valued copies of MODEL control speed events? BUILDER Magazine. Gold let­ Circle Burner in Cicero bly for one from a Golden Bee. This com­ Dear Circle Burner: bination will slow the engine to 6000 tering on spine and front cover. The secret is to go faster than anybody RPM and increase the running time to else. almost seven minutes. Whatever you do, Jake stay out of the clouds! Come on and join the 1/2A Texaco ma­ ★ ★ ★ nia. Build a 1/2A Texaco Playboy Sr. and Dear lake: try for the winner's circle. · Are there any standard eligibility criteria for O ld Timer Free Flights? I've seen pre-1938, pre-WWII, and pre-1943. Which is it? Buttercup____Continued from page 19 Want to Know in Wantaugh Dear Want to Know: these points and add hinges. The light­ No one under the age of 25 whose first weight but warp-free tail surface con­ model airplane was radio controlled is struction is interesting, and not seen eligible to fly Old Timer Free Flight. before by this writer. Note that the 1/16 x Jake 1/4 stiffeners lie between the two outer ★ ★ ★ layers of 1/16 sheet. The outside edges are Dear lake: pulled together and glued, forming a sym­ I have been a free flight modeler all my metrical section. life. It has been my only hobby. Now, I Nothing complicated about the wing. One B in d e r...... $5.95 have discovered my w ife has worms. I am Additional rigidity could be obtained by Three Binders . . . $15.95 considering taking up fishing so we could sheeting the under side of the leading Five Binders .... $25.95 enjoy that hobby together. What do you edge back to the front spar, undercutting think? the ribs by the sheeting thickness to ac­ (For more than 5, include S5.00 for each additional Hesitant from Howell commodate the sheeting. To complete the Dear Hesitant: D-tube effect, add webbing from the spar binder.) Fishing is dull. I think the two of you to the top sheeting. Install webbing before Shipping: Binders shipped in U S. should take up raising racing pigeons. You adding the top sheeting. Note the continu­ by UPS only. For one binder, add build the coops, and let your wife provide ation of the top fuselage stringers onto the S2 00. For each additional binderr the food supply. top of the wing center section. Jake The fuselage is a simple box of long­ add 75c. For binders shipped out­ erons, uprights, and cross-pieces. The side U.S., add S3.50 for one bind­ non-functional wing strut attach points, er. For each additional binder, add not shown on the fuselage, are at the in­ Playboy...... Continued from page 43 S I.50. For A ir Mail rates overseas, tersections of the two non-vertical uprights please inquire. at the front and back of the door panel. of dope works well for me. Use regular PLEASE Ail payments must be in U.S. For those who want to enlarge the plans funds, drawn on a U S. bank. Butyrate until the covering reaches the to quarter-scale, you're on your own, as desired taughtness, then use plasticized California residents add 6% Sales Tax dope for the remaining coats the article gave no indication of the span of the original. Plans for a F/F or U/C ver­ P lS L eni ine. USel in ,he 1/2A T^aco sion were in the same issue, and if these Playboy was a Cox 049 Black Widow The MODELS' were one-inch scale, it came out to 25 h?,S fT addi(i°nal head shims feet, which could be about right. Would BUILDER (glow head gaskets) for a total of five. This someone help us on that? 621 West Nineteenth St., Box 10335 w L neJ UmS 3 cleLaned UP 8x4 Top Flite Super-M prop at about 7000 RPM. It runs Whatever size you decide on. Buttercup Costa Mesa, California 92627-0132 w ill be easy to build and fun to fly! ·

THIRTY FIRST ANNUAL niLEDU RADIO CONTROL EXPOSITION Come, join us and enjoy yourselves at, un­ questionably, the world's greatest radio con­ TOLEDO SPORTS ARENA trol model show. Open to the public all three ONE MAIN STREET great days. TOLEDO, OHIO Advance tickets may be ordered by sending a large self- addressed-stamped envelope to: Tickets, 38235 Castle, MARCH 29, 30 & 31 Romulus, Michigan 48174. Include a check or money order FR|DAY 9 am « made payable to "Weak Signals R/C Club" and you must please indicate which expo days the tickets are to be used. SATURDAY 9 a m '-Pm SUNDAY l Prices are $4.00 per day for adults and $1.00 per day for children 12 and under. All tickets along with a program will be mailed back on March 10, 1985.

107 OLDIES (BUT STILL GOODIES!) MOST BACK ISSUES OF MODEL BUILDER ARE STILL AVAILABLE, THOUGH THE SUPPLY IS DWINDLING. THE RE'S A TREASURE OF REFERENCE DATA IN EVERY ONE . . . FULL-SIZE PEANUT PLANS, SUPE RB WESTBURG SCALE-VIEWS, HOW-TO ARTICLES (MANY WITH DETAIL SKETCHES), F/C FLYING TECHNIQUES, R/C POWER AND SAILBOATING, AND MUCH MORE.

ACT NOW, BEFORE THEY'RE GONE FOR PRICES: All issues prior to January, 1981 . All issues January, 1981 and later ISSUES NO LONGER AVAILABLE Specify issues desired by month and year. Magazines FROM OUR STOCK: June -73 will be mailed Second Class, postpaid. Foreign orders (except APO and FPO) must add 60d per copy. Allow S e p t'71 (No. 1) M ay'76 four weeks for delivery in US. If UPS shipment is des­ Feb. '72 Dec. '77 ired, add $1.25 minimum for up to two magazines, or add $1.25 plus 354 for each additional magazine on March/April '72 July '78 orders for three or more. Remit by International Mon­ July - Dec. '72 Oct '78 ey Order or U.S. funds drawn on a U.S. bank for Over­ seas orders. Master Card or VISA accepted. Include Jan. - April '73 Dec. '78 card number, expiration date, and your signature. MODEL BUILDER, P.O. Box 10335, Costa Mesa, CA 92627-0132 Phone: (714) 645-8830 THE MODELERS' CHOICE • SUPERIOR EDITORIAL CONTENT

• HIGHER EDITORIAL TO ADVERTISING RATIO

• THE FINEST AND MOST COMPLETE CONSTRUCTION ARTICLES • PLAN SERVICE • UP TO THE MINUTE ARTICLES ON NEW PRODUCTS AND PRODUCT REVIEWS • CONTEST AND SHOW COVERAGE M a il to : MODEL BUILDER P.O. BO X 10335. COSTA MESA, CA 92627 (714)645-8830 M/C or CD $25.00 For one year subscription Subscription copies m ailed in envelopes, add $3.00 VISA # ______Π $32.00 Outside U. S. including Mexico and Canada in protective envelope .add $3.00. Expiration D a te ______Outside U. S . One year subscription only. S ignature______Please enter my subscription: ONew □ Renewal CJ Please send gift subscription to: A d d 5% Name Nam·______Gift Card From _ AdOresa . Addreaa . A d d r · · · ______City----- _ State - -Zip. C ity______Zlp_ C ity------Zip _ Country . Country. Country _ Prices subject to change w ithout notice. WORLD FLIGHT PILOTS JEANA YEAGER DICK RUTAN PHOTO BY DOUG SHANE

Voyager PHOTO BY PAT STORCH

BUILT WITH

WORLD FAMOUS ADHESIVES

TO DATE: NO ONE HAS EVER FLOWN AROUND THE WORLD NON-STOP WITHOUT REFUELING. NO GOVERNMENT, AEROSPACE INDUSTRY, OR INDIVIDUAL HAS EVER DONE IT! AMERICAN PRODUCTS / AN AMERICAN DREAM AROUND THE WORLD NON-STOP — WITHOUT REFUELING — ULTIMATE PERFORMANCE, THAT'S WHAT THE VOYAGER IS ALL ABOUT. THE FACT THAT IT IS ONE OF THE MOST BEAUTIFUL AIRCRAFT WE’VE SEEN JUST MAKES US DROOL MORE!! WING SPAN; 110.8 FT. · WING AREA 363 SQ. FT. · ASPECT RATIO: 33.8 · CANARD SPAN 33.3 FT. · ASPECT RATIO 18.1 TOTAL AREA 424 SQ. FT. · TAIL VERTICAL HEIGHT 10.3 FT. · FUSELAGE LENGTH: 25.4 FT. · BOOM LENGTH: 29.2 FT. BUILT WITH AMERICAN PRODUCTS, SOMETHING WE CAN ALL BE PROUD OF. MATERIALS: “ HOT STUFF,” GRAPHITE, FIBERGLASS, KEVLAR, EPOXY, NOMEX PAPER HONEYCOMB CORE, STRUCTURAL WEIGHT 939 LBS. · FINISHED EMPTY WEIGHT: 1858 LBS.

W ITH 16 INTERNAL FUEL TANKS (1489 GAL.), LOCATED IN WING, BOOMS TANKS, CANARD AND FUSELAGE FILLED, WORLD FLIGHT TAKE-OFF WEIGHT: 11326 LBS. — VERY NEARLY FIVE TIMES ITS WEIGHT IN FUEL! ANYWHERE YOU LOOK, YOU’LL FIND “ HOT STUFF’"“ PRODUCTS AROUND THE WORLD - IN OUTER SPACE - UNDER THE OCEANS OF THE WORLD

AT 'S o t je f f it e C & X / WE’RE MOST PROUD, WHEN AMERICAN “ HOT STUFF’’ BUILDS YOUR MODELS FOR MORE INFORMATION ON THE RUTAN AROUND-THE-WORLD VOYAGER, PLEASE SPECIFY “VOYAGER INFO" WRITE TO:

City P.O. BOX 836, SIMI, CA 93062 · (805) 522-0062 The army knows a good thing with heavy-duty off-road when it sees it differential, hexagonal universal It was only a matter of time MRC-Tamiya’s joints, heavy duty high impact before the U.S. Army plastic body, and picked up on off-road superbly realistic buggies as a new force detailing. But the best fast attack vehicle part is when you in weaponry. ✓ Quick, rugged, add the driver in light, and combat fatigues durable, the Fast takes the competition and mount the Attack Vehicle is now in a prototype intimidating M-60 machine gun. Anyone stage . . . being tested in battlefield still trying to keep up with you at this point and commando situations. by force will quickly put up the white flag. And who else but MRC-Tamiya, the ruler of off road It Puts All The Weapons In Your Hands buggies, could bring a copy of this new breed of road Speed is always an effective weapon. And our FAV warrior to you in such menacing detail. won’t let you down. It's even been built to accept our Part military . . . part racer... all performance Black motor, ball bearings, and oil-filled shocks. Use The Fast Attack Vehicle (FAV) combines the the camouflaged body to stay out of sight. Then spring military concept of stealth with off road toughness. to action and gun your vehicle to the front of the pack. Its RS-540 motor generates the kind of power and The competition won't stand a chance. speed you need to take the competition by surprise. It’s a "track attack" like never before . . . and you’re This off-road commando features a 186mm super wide in command. So get to your hobby dealer today, track wheelbase, a low center of gravity, and and start taking the off-road front and rear trailing arm suspension world by force with systems. Nerf bars on either side prevent MRC-Tamiya's rollovers. However, should you flip it, a Fast Attack roll bar protects the vehicle from Vehicle. damage. Other strategic features include front and rear-spring type shocks, a sealed gear case

M R C © BR· Model Rectifier Corporation 2500 Woodbridge Avenue, Edison, NJ 08817 MRC is a Trademark of Model Rectifier Corporation 2-channel radio control required (not included). Uses 6 or 7.2 volt. 1200 Mah batteries (not included).