MODEL S MARCH 1974 / volume 4, number 28

BUILDER ONE DOLLAR DUMAS COVERS THE WATERFRONT... with every type of model boat and the hardware to run ’em too!

Hydro — Typical hardware for Atlas Van Lines 40. Drag'n Fly 40 and 60 and similar models. Includes plated steel universal joints with hardened pins, turn fin for sponson mounting (not shown), welded brass strut with needle « · · · » ♦ » * bearings, adjustable aluminum mounting bracket, aluminum T TTTTFTT rudcler bracket, brass water pickup, and welded stainless I I i I I I I steel rudder. Photo shows threaded plastic propeller ' 1 1 (various plastic and bronze props are available), drive dog and prop nut for use with unthreaded I ! props, and needle bearing brass stuffing box. ·

Jill I III - II - li II Mono — Typical hardware for SK-Daddle20and 40 with inboard rudder n i ) » H B installation. (Outboard rudder mount similar to Deep Vee.) Trim plates (not shown) are available. Includes hardened aluminum motor mount, welded A j . brass turn fin, plated steel flywheel, brass or steel universal with hardened steel pin. brass water pickup tube and rudder assembly, threaded drive shaft for plastic prop with shear pin hole for unthreaded prop. Drive dog is used for certain types of special props. U ll Stuffing box has Oilite bearings.

Scale - Typical hardware for powering Trojan Cruiser, Coast Guard Life Boat and similar scale models. Single or multi-motor Deep Vee - Typical hardware for Deep Vee 20F. 40F. and/or shaft installations are possible using 60 and 60F — basically similar to that for hydros. the Adapt-A-Drive transmission unit illus­ Stuffing box contains needle bearings and trated, as well as for increasing or decreasing tube for greasing. Deep Vee gear ratio, changing distance between shafts and selecting counter-or same-way- rotation of props. Includes brass gears with Oilite bear­ ings, nylon coupling rods, universals, shafts, brass stuffing boxes, nylon struts and props. Rudder assemblies are brass with plated steel steering arm Servo-operated Dumas speed and direction control unit provides propor­ Please send me price list and: tional forward and reverse speeds and neutral- Famous Dumas Pittman motors are □ Complete Dumas Catalog (50c) available in 6-and 12- volt versions.

Name______* I Street______dumas City______I I State______Zip------i boats Dumas Products. Inc.. 790 South Park Avenue, Tucson, Arizona 85719 903 Church Street, Nashville, Tennessee 37203 M H Y CÄ P ifO l, U.S.A. one (615) 259-4612 (Est. 1951) Home (615) 352-4380 World's Largest Supplier of Deluxe Est. 1951 Est. 1951 Built-Up RC Aircraft For fast delivery, call us with those C.O.D. orders. We stock all major brands. No order too small or too large.

Carl Miller, longtime modeler and manager of Send 50«P PT-17-C BIPE. Pictured above is one of the finest scale airplanes Hobby Capitol, U.S.A., displays his three cus­ we have ever offered for sale. It is a 70-inch span, perfect scale tom built Spinx Akromaster planes. aircraft with superb detail, including bucket seat, pedals, exact for Big tubular structural construction in cockpit. The plane has an im­ If you're looking for a particular type ot air­ maculate finish with rivets, etc. A painstakingly constructed plane ready to fly, contact Carl. He’s got what radial engine is nestled inside that beautiful cowl for static judlng you need. Brochure points. Truly a labor of love, this outstanding miniature aircraft has over 500 hours of professional work In it. The price Is $800.00. Save With a Used Radio We receive many of our used radio sets from hobby­ ists who simply want to trade for a newer model, a different stick or servo configuration, or, like many people who buy a new car every year, just want something different. Often you will find that by choosing a good used radio from us, you can out­ fit yourself completely with radio, plane, motor, etc., for less than the cost of a new radio by itself. USED PROPORTIONAL SETS 4. C'ship CC-1 465MC Tx. 1 Digital USA 4-ch on 72. $ 10. $135. 5. F&M Pioneer Receiver 27 095 or 27 045. $15. 6. Min-X 6-ch, 2-stk on \» € ^ 72.160 $125. MULTI-CHANNEL REED SETS 7. C'aire 4-ch. 2-stk. Dual 1. 10-ch Kraft Custom Tx & ext. chgr $130. Rec. New. $70. 8. Servos for Bonner 4-RS 2. C'ship 10-ch TX & 2 Rec. OLD IGNITION TRADE-IN system. Each $15. Relayless. On 27.145 $30. 9. Receiver only lor Orbit \ 3. CG T-5 Tx & TR5 Rec. We buy and sell old time ignition engines. Box up 6-ch. with plugs. $25. Relay & 2 servos. $30. what you have and send to us for an honest ap­ 10. Bonner 4RS. Like new. 4. 10-ch Orbit Tx. relayless praisal. It could be worth a new proportional set On 72 40. Airborne Wt. 11 oz. Rec, 3 servos. On 27.145. $50. to you. We have many engines with which you can Clean set in original box. $160. 5. C'ship 10-ch TMS Tx. Rec also start a collection. RL. 3 se. jos $40 11. Micro 6-ch. 2-stk. 5 ser- % We welcome your built-up airplanes, used pro­ vos. $125. ,ø ’ 6. C'aire 10-ch. 27.195. Rec, portionals and old time ignition engines. Come 5 servos, Pak & Chgr. $70. SINGLE CHANNEL - USED c , V * 7 New Kratt Custom 6-ch. 3 trade with us. 1. F&M GG-1. On27.145. $25. servos, Pak & Chgr. $75. 2. Otarion OT-31, Tone Tx. 8 New 5-ch Rec. Relay type. $15. Museum piece. $20 3. Babcock BC-2 Tone Tx. 9. Antique Walt Good ground $15. base Tx. New. $50 Authorized dealer for Orbit, Micro-Avionics, Pro Line, Kraft, RS Systems and MRC radios. We pre-pay shipping on all new sets

Authorized distributor for EK Products and World Engines RC systems. Inquiries welcome.

MARCH 1974 1 OLDIES (but still g o o d ies;) ALL BACK ISSUES OF "MODEL BUILDER" ARE STILL AVAILABLE, THOUGH SOME ARE IN SHORT SUPPLY. IF YOU PLAN TO FILL OUT YOUR COLLECTION, YOU HAD BETTER ACT NOW ! PRICES VARY ACCORDING TO QUANTITY REMAINING IN STOCK. Oct/Sept 1971 November 1971 December 1971 First issue! Nancy, R/C soarer. Curtiss-Wright Junior Beanpatch, mul*. R/C Pattern World R/C 2 " scale. Peanut Jodel ^ Varet. Championships. R/C Twin Trainer Fairchild scale, Peanut Fokker D VI. 75" span, for ,40's. for fV>Njr F/F. LSF Tournament story. Peanut Laird LC-DC. R/C ^ 'mg Champs. Bi-Prentice, R/C bipe Volksplane 3V-1 1P-^rtats reports. trainer. 3-views. How to build light "w ire" wheels. Vol. 1, No. 1 $6.00 Vol. 1, No. 2 $3.00 Vol. 1, No. 3 $1.00

January 1972 February 1972 Mar/April 1972 SHOCer F/F by Mel Minnow U/C profile Yankee Gull R/C glider, Schmidt. scale racer. 8 ' to 12' span. White Trash, famous Fokker E-Ill R/C scale. Miss Cosmic Wind, QM R/C soarer. Al Vela’s E-Z Boy 1/2A R/C Pylon racer. Peanut Ord-Hume. E-Z Boy 1/2A, Al Vela. Peanut Scale Bucker Chet Lanzo's famous Peanut Ford Flivver. Jungmann. rubber Puss Moth. Fiberglassing over balsa, Siebel 1/4A F/F scale. Curtiss Robin 3-views. by Le Gray. Mr. Mulligan 3-views. Spoiler, FAI Combat. FAI power "Folder."

Vol. 2, No. 4 $1.00 Vol. 2. No. 5 $1.00 Vol. 2, No. 6 $1.00

May 1972 June 1972 July 1972 Seahorse II, R/C sea­ Bob White Wakefield. Fairchild 51, 1" scale, plane. For .19-.35. Mongster QM biplane R/C or F/F. D.H. Humming Bird, R/C pylon racer. SAM-5 A/2 Nordic. F/F or R/C pulse. Calif. Coaster R/C 1912 Avro G rubber. Peanut Fokker V-23. glider. Sheet wing. Comanche C stand-off Whetstone 1/2A U/C Three profile Peanuts. R/C scale. combat. Deperdussin 3-views. Travelair 2000 2” scale Ryan ST 3-views. Pesco Special 3-views. R/C, by Editor. Tethered Cars, R/C sail. Chester Jeep 3-views.

Vol. 2. No. 7 $1.00 Vol. 2, No. 8 $1.00 Vol.2. No. 9 $1.00

August 1972 September 1972 October 1972 Bonzo standoff R/C Coleen-12 R/C glider. Stephens Akro R/C sport pylon scale. Baby Boomer, sport sport scale. Counterfeit, tailless .020 F/F. Mini-FAI F/F for .010. A/1 Nordic. Paper (?) Glider, CO2 Peanut Bellanca bipe. Shoestring R/C QM. jet. 1972 Nats reports. Peanut Taylorcraft on Little Toot semi-scale Chester Special 3-views. floats, also big one. R/C for .40 power. Electric power analysis. Fairey Delta 3-views. Nesmith Cougar 3-views Internats R/C pylon.

Vol. 2, No. 10 $2.00 Vol. 2, No. 11 $3.00 Vol. 2, No. 12 $3.00

K November 1972 December 1972 January 1973 UJ o Torky 1/2A proto pro­ Don Quixote R/C glider. Sproose Goose R/C J file by Dale Kirn. T.O.A.D. one-design bipe for .60 power. Seagull, R/C flying R/C pylon racer. Spectral R/C glider for boat for .29 to .45. Mather's Penny Plane. single channel. Peanut Skyraider or 49'er, rubber sport F/F. Peanut Ole Tiger. 26 inch span. Peanut Stahlwerk. First "Plug Sparks" col, LSF Tournament story 1912 Blackburn mono­ Andreasson KZ VIII Tethered cars. plane 3-views. 3-views.

Vol. 2, No. 13 $2.00 Vol. 2, No. 14 $3.00 Vol. 3, No. 15 $3.00

Please send me the following back Vol. 1, No. 1 □ Vol. 2, No. 9 □ Name: - ______issues of Model Builder, as marked, post­ Vol. 1, No. 2 □ Vol. 2, No. 10 □ age paid. Foreign orders (except Canada, Vol. 1. No. 3 □ Vol. 2, No. 11 □ Mexico, FPO, APO) add 15 cents per Address:______Vol. 2, No. 4 □ Vol. 2, No. 12 □ copy. A check or Money Order (no cash Vol. 2. N o .5 □ please) for total amount of $______Vol. 2, No. 13 □ C ity :______State: is enclosed. A facsimile o f this order Vol. 2, No. 6 □ Vol. 2, No. 14 □ form may be used. Send S.A.S.E. for Vol. 2, No. 7 □ Vol. 3, No. 15 □ PLEASE PRINT ^ z ip :. complete listing to date. Vol. 2, No. 8 □

2 MODEL BUILDER MODEL ^ MARCH 1974

BUILDER volume 4, number 28

Ί ------STAFF I CONTENTS

EDITOR FEATURES Wm. C. Northrop, )r. WORKBENCH, B ill N o r th r o p ...... 4 GENERAL MANAGER Anita Northrop OVER THE COUNTER, B ill N orthrop...... 6

EDITORIAL ASSISTANT RADIO CONTROL REPORT, Frank Schwartz ...... 12 Le Gray R/C P Y L O N , Tom Christopher...... |4 ART DIRECTOR Paul Plecan PLUG SPARKS, Jo h n P o n d ...... 17

SECRETARY O.T. POWERHOUSE R/C, B ill N orthrop...... 22 A. Blackburn CHOPPER CHATTER, Jo h n Tucker...... , 24 SUBSCRIPTION MANAGER A. Valcarsel MAIN SHEET, D on P r o u g h ...... 26

F/F SCALE, Fernando Ramos ...... 32 CONTRIBUTORS H A N N A N ’S H A N G A R , B ,II H a n n a n ...... 34 Tom Christopher FREE FLIGHT, Bob Stalick ...... 38 Chuck Hallum Bill Hannan NFFS NEW S...... 41 Dale Kirn R/C SOARING, Le G r a y ...... 42 Walt Mooney CONTROL LINE, Dale K irn ...... 45 John Pond Fernando Ramos R/C AUTO NEWS, Chuck Hallum ...... 50 Frank Schwartz Bob Stalick SCALE VIEWS John Tucker DOUGLAS YO-31C/Y10-43, Peter W estburg ...... 27

ADVERTISING REPRESENTATIVE CONSTRUCTION Bob Upton, 20626 Clarendon Aye Woodland Hills. California. 91364 OSPREY 1, Dave R a m se y...... 7 1213) 883 7681 LITTLE GEM, A ustin L e ftw ich and Brad S h e p h e rd ...... 16

POWERHOUSE, .020 REPLICA, Gene Wallock and John Pond ...... 20 Subscriptions S 10.00 per year. $17.00 two years. Single copies S I.00. Add 52.00 for PEANUT SE5, W alt M ooney...... 35 postage per year outside of U.S. (Except APO). Add $0.75 for Canada and Mexico. THE GNAT, B ill W a rn e r...... 48

Copyright 1974 The MODEL 8UILDER All rights reserved Reproductions without per mission prohibited Cover: David A. Ramsey, Chester, New Jersey, built this 70 inch R/C scale model of the Published Monthly by The MODEL BUILD­ Osprey 1, a homebuilt sport flying boat designed by George Pereira. It is the subject of Dave's construction article featured in this issue, beginning on page 7. ER Magazine, 1900 East Edinger Ave., Santa Cover photo is from a 35 mm transparency by Robert Humbert. Ana. California 92705. Phone (714) 547 3963

Second Class postage paid at Santa Ana. Ca

MARCH 1974 3 f r o m B i l l

N o r t h r o p ' r w r o r l e b e n c h · ·

Sunday, Aug. 4th and carry through published that is seriously misleading, Wednesday, the 7th. Outdoor F/F starts that could cause trouble for the hobby’s Wednesday with A/1 and A/2 Nordic, relationship with a Federal agency, we and B Gas. Wakefield and 1/2A Gas are feel it is proper to help in correcting on Thursday the 8th. Friday is for Un­ the error. limited Rubber and FAI Power. Coupe In the January 1974 issue o f one o f and A Gas Saturday, and C Gas, Rocket, our national model publications, there is and Scale are the last F/F events, on an article on getting R/C licenses. The Sunday, August 11 th. article implies quite clearly . . . and very C/L starts on Wednesday the 7th with incorrectly . . . that one may use the 6 Jr. Combat, 1/2A Profile, 1/2A Proto, meter band with a Class C license. Jr. Stunt, Dive B & S, Scale Racing Jr. Further, it states that the 27 Mhz fre­ and Sr. Thursday includes Sr. Combat, quencies are “ assigned to R/C models,” 1/2A Speed, Sr. Stunt, Open Scale Rac­ which would be nice, if it was true that ing. Friday is FAI Combat, Jet Speed, no one else could use them. Finally, Mouse Race, Profile Carrier. Saturday the mix up o f frequency flag colors on the 10th has Open Combat, A Speed, THOSE NATIONALS AGAIN! 27.045 (red, not yellow) and 27.145 FAI Speed, Open Stunt, Jr. and Sr. Rat. (yellow, not red) has apparently been Wouldn’t you know it? We no sooner On show day, Sunday, there is Open picked up from the 1973 AMA Rule line up what could be the best Nationals Combat Finals, B Proto, B Speed, Open Book error (later Rule Book copies had site in many a year, and somebody Stunt and Open Rat. The final day, comes along to pull the cork out of our a correction stamped on it in big, red Monday, includes Slow Combat, For­ letters). gasoline tanks! If this keeps up, by 1975 mula .40 Speed, C Speed, FAI Team, the Nats is liable to turn into the biggest Our chief concern is with the first and Carrier I and It. statement, about the use o f the 50-54 postal contest the world has ever seen NOTE: A ll of the above schedules Mhz band. This is now, and we hope . . . or maybe it’ll still be held at one are tentative; subject to Executive Coun­ particular site and everyone around the will continue to remain, the Technicians cil approval. Also there are numerous Band, one for which an examination country will ship their models to have unofficial events, such as Old Timers, them proxy flown. must be passed in order to obtain a Rubber Speed, Navy and Peanut Scale. license and operate legally. Unfortunate­ “ joe Fumblethumbs, East Podunk, Penny Plane, etc. that will be added. ly, there are already too many modelers takes first in Class D Expert at the 1975 We understand at least one motel, operating illegally on 6-meters, attracted R/C Nats! His plane was proxy flown by the Holiday Inn, which is close to the by the minimal use in R/C. The effect Ron Chidgey." site, is already booked solid. Those o f this magazine article could be like O r “ Ron Chidgey just managed to wishing accommondations, other than throwing gasoline on an already disas­ beat out Harold Goldklank for last place. what is usually offered by AMA for trous fire. His plane was proxy flown by Joe workers and contestants, had better get For many years, we have been an­ Fumblethumbs.” on the horn. The Downtowner Motor noyed by the continued use o f 6-meter How about . . . “ Mel Schmidt placed Inn is 318-433-0541. Ramada Inn is radios by unlicensed modelers. Perhaps 1st, 2nd, 4th, 6th, and 8th in Class B 318-433-9461, Lakeview Motel 318-436- this is partly because it was so damned Gas, flying proxy for Bob Watson, Hardy 3336. (These three are on the shore o f hard for us to get our own Technician’s Broderson, Dave Linstrum (Dave Unst­ Lake Charles. We picked the Down­ license. Oh, it’s not that difficult, but if rum?), John Duncan, and Rol Anderson, towner.) Largest, most expensive, and you’re not a "natural” for electronics, respectively!" with many added attractions, is the you really have to work at it; bone up Oh well, back to 1974. Most info on Sheraton-Chateau Charles318-882-6130. on Ohm’s Law, send and receive Morse the Lake Charles Nats has been published Others include Belmont Motor Hotel Code at 5 words a minute, be able to in AMA Mailing, but if you haven’t 318-433-8291. Assunto’s Hotel Courts answer correctly a large portion of noticed, the activity schedule goes from 318-439-9436 (both near the field), about 100 multiple choice questions, Tuesday, August 6, through Thursday, Howard Johnson 318-433-5213, and and be able to sketch a couple o f basic August 15. (Please forward all successful Imperial 400 Motel 318-436-4311. circuits. explanations to the family about where Lake Charles is in one o f the hottest Anyhow, it was just enough o f a that second week of vacation went and and most humid areas of the country, so struggle for us that we feel it is some­ we'll publish them). take extremely light clothing . . . and thing special and should be reserved for In radio, Quarter Midget is set for lots of it, for frequent changes. August those who want it enough to work for Aug. 6 and 7 in the AM; Soaring in the also happens to be the rainy season, so it. We also think that R/C equipment PM. FAI Pylon is scheduled for Aug. 8 pack in some lightweight plastic rain­ manufacturers should require FCC Tech­ and 9 in the AM; Formula I in the PM. wear. A few years ago in Chicago, all o f nician License numbers from purchasers Formula I runs all day Saturday the the local stores sold out quick when we of 6 meter equipment. They’re easy 10th. All day Sunday, the 11th, goes to got a couple o f wet days. O f course, the enough to check in the FCC License Sport Scale, in conjunction with the Air rain will probably feel good, but you’ll Handbook. Show. Class C Pattern qualifying is flown need the plastic to cover your planes In fact, wouldn’t it be nice if radios all day Monday the 12th and Tuesday and equipment! could only be warranteed with licensed the 13th. C Pattern finals are flown, NO... NO... NO! modelers on ALL bands. A t least then with “ Museum” Scale on Aug. 14 and 15 It is not our policy to publicly point the FCC might have a better idea o f how AM, and A <& B Pattern finish up the out errors made in other publications, many o f us are using the frequencies. It program in the PM o f both days. Tent­ particularly ones in our hobby . . . might surprise them . .. atively, helicopter activity is also setup mainly because it’s all too easy to find A MEMORIUM for the 8th and 9th, PM. ourselves on the same, wrong side o f the We were fortunate enough some years In Free Flight, Indoor Events start on fence. However, when something is ago to watch Bevo Howard perform in

4 MODEL BUILDER his Bucker Jungmeister, and though he did astonishing things with the little biplane, none of it appeared reckless or without full control of his excellent flying ability. Report o f his death last fall, while “ doing his thing," left us wondering what could have caused it. He seemed to be the type who would retire after, not during his last perfor­ mance. It was therefore with some kind of inner relief and feeling of justification that we read this item in the January issue of "Worksheet,” newsletter for the Western Ohio Radio Kontrol Society, writer unknown: “ When Bevo Howard was killed dur­ ing an aerobatic exhibition in Green­ ville, North Carolina, last October, everyone who knew the handsome, age­ less aerobat was stunned, for Howard was such a perfectionist . . . such a precise, highly experienced airshow ex­ pert .. . that “ pilot error” was an almost inconceivable explanation for the acci­ dent (He hit a tree during an inverted pass and tore the upper wing o ff his Bucker Jungmeister). The probable cause o f the crash is stranger than any surmise, it turns out: An autopsy showed that Howard had been poisoned by a black widow spider, and the spider’s nest was discovered under the "Gee honey, 1500 scjuare feet for your hobby- seat o f his airplane. One o f the first things hit by such a sting is said to be workshop and looo square feet fo r th e the optic nerve, and it seems likely now that Howard’s sight was suddenly and rest of the house...... are you sure that£ severely affected by an insect bite that he either never noticed during the heat correct ?" o f flying or assumed had been nothing more serious than a bee sting.” LSF NEWS THINGS TO DO WHEREFROM THE METHANOL? Dan Pruss, Plainfield, Illinois, has The Soaring Nationals has been Our comments last month on the been elected president o f the League o f firmed up for July 22, 23, 24, and 25, glow fuel shortage situation proved at Silent Flight and will serve for two 1974, and will probably take place at least one thing . . . somebody’s reading years, 1974 and 1975. Dan, LSF/060, Lewis University, last year’s site. The this tripe! We received several letters is an airline pilot, and also is owner first three days w ill be for competition pointing out our apparent lack of know­ o f Su-Pr-Line Products, manufacturer and the last day is set aside for a sym­ ledge concerning the source of glow of Nyrod and associated items. posium, during which time there will fuel’s major ingredient, methanol. Also serving with Dan for the next be discussions about forming a national two years is Barbara Henon, LSF/250, organization. Well, you were right about our name Pacific Palisades, Ca., vice president; * * * being at the top o f the list of those who On June 15 and 16, 1974, the know nothing about chemistry . . . that John Nielson, LSF/240, Chicago, secre­ tary; Hugh Stock, LSF/134, Saratoga, Golden TRIAD Model Masters w ill be is with the following exception: Ca. re-elected treasurer. Walt Good, holding the Southeastern Control Line “ Willie was a chemist, but now he is LSF/063, former vice president, contin­ Model Airplane Championships, a doub­ no more, For what he thought was ues to serve as European coordinator. le A sanctioned contest. Site is the H20 . . . was H2S04!’’ Memorial Coliseum Parking Lot, Win­ One of President Dan Pruss’ first However, our statement that methanol ston-Salem, North Carolina. Wm. A. moves has been to establish a new Pardue, Jr., 1201 Surry Dr., Greens­ is a petro-chemical still stands . . . with address for radio processing o f incoming these additions; it was and still is made boro, N.C. 27408 is the Contest Direc­ mail during 1974-1975. The “ hot-line” tor. from wood, and, in recent years, it has address is P.O. Box 39068, Chicago, * * * been found even less expensive to derive III. 60639. (Write it down now, and pin There’ll be more information coming it from natural gas. it up over your workbench.) The along later, but for now, plan to come Obviously, with our limited know­ League’s permanent address continues to southern California on the weekend ledge o f these things, we would hardly to be Box 2606, Mission Station, Santa of May 11th and 12th. This is the date make such statements without knowing Clara, Ca. 95051. scheduled for the big Model and Craft the reliability o f the source o f informa­ We understand steps are being taken Show to be held at the Anaheim Con­ tion. K&B’s Johnny Brodbeck, from to have a 1974 LSF R/C Soaring Tour­ vention Center, Anaheim, California . . . whom we gained this enlightenment, nament in California. Site and date un­ right next to Disneyland. Over 200 ex­ points out that if the above is not known at this time. V.P. Barbara Henon hibitions are expected to occupy display true, then he and a lot of other people is to be Tournament Directoress. booths in the huge hall, and there will in the industry have been conned. And speaking o f . . . Continued on page 72

MARCH 1974 5 OVER THE COUNTER

• Astro Flight, Inc. is now producing a Field Charger which is specially de­ signed to rapid-charge both Astro 10 and 25 nickle cadmium power packs from motorcycle batteries. Special adap­ ter cords are also available to permit rapid, on-field charging o f 1972 and 1973 model Kraft, Pro-Line, and S&O radio receiver and transmitter packs (or any radio using 550 Ma GE half sub-C cells). The unit may also be used to determine the condition and state of charge of all o f these battery packs. The charger components are built into a compact field box which also carries the two motorcycle charging batteries, props, wrenches, epoxy, etc. (No cleaning solvents, rags, paper towels Flyline Model's 3/4 inch scale Bellanca "Skyrocket" for small R/C or rubber F/F. fuel pumps, electric starters, fuel cans, primer bottles, et al, are needed when you fly with electric power!). There is selector switch on Low (Astro 10) or also a compartment for your transmit­ High (Astro 25) and wind up the switch/ ter. timer. In 15 minutes you're ready to The charging components are mount­ go! ed on an instrument panel which carries The Field Charger lists at $29.95, a 0 to 10 Amp meter, a 15 minute less motorcycle batteries . . . which can switch/timer, a charging input and out­ be purchased at most cycle shops, Sears, put connector, and a selector switch. Wards, Pep Boys, etc. The motorcycle batteries are charged * * * through the panel connector by any Flyline Models is now producing its external 12 volt charger operating o ff 3/4 inch scale Bellanca “ Skyrocket.” 110 volt house current. An adapter This model o f a very historic classic plug is furnished, and Astro Flight will spans 34-1/2 inches, and with .020 pow­ have a charging unit available option­ er, w ill take pulse or small multi radio ally. systems. It would also make an excellent To charge the electric motor power rubber scale ship. Price is $7.95. pack, an adapter cord is furnished with Kit includes super detailed rolled plug and jack to be used at the aircraft plans, scale wheels, decals, and top New 60 R/C engine being imported from end. Plug everything together, put the Continued on page 63 England by Midwest Model Supply Co.

Sport Scale Boeing-Stearman Model 75 by Nick Ziroti, and Field Charger and equipment box by Astro Flight, specifically for Long Island Hobbycrafts. Inc. charging electric motor flight batteries.

6 MODEL BUILDER o m e v i Build an R/C scale model of this striking homebuilt flying boat, which once again proves that you don't need brute power to take off from water. . . just good hull design. By DAVE RAMSEY

• The Osprey I has to be one o f the landing becomes most interesting. After maining formers are added. neatest seaplanes I have yet seen. The many tries at making a good landing, I NOTE: Plan your equipment in­ full size Osprey is a single place, sport have arrived at this procedure: (1) Power stallation and make the cut-outs in the flying boat homebuilt, designed by reduced to establish a rate o f descent, formers before the formers are glued George Pereira. It is constructed mostly (2) when it is time to level out before in place. For added strength to the of wood, covered with fiberglass. The the flair, cut back on the power. With formers, tack glue the cut-outs back in only metal in the construction is the the power at idle, the nose w ill come place and remove them before the hull center truss which holds the engine and up and she will sit down just as nice as is sheeted. —» - the wing folding assembly. you could ever want. This does take The Osprey I is painted white, Hug­ practice, however, and after 30 or so ger Orange (auto paint), and black. The flights, I am still working on the land­ full size aircraft can be built for around ings. $1500, less engine, prop, and a lot o f The model is stressed for hard flying work. So for the time being I will have and will take a beating. Acrobatics are to content myself with my model. I no problem as long as you remember feel that the model Osprey I is the most she is a scale seaplane. impressive flying and looking seaplane One thing that puzzles people when I have built, and I think that anyone they first see my OSPREY, is how can building her will feel the same. it get o ff the water, at that weight, with The full size OSPREY I is built al­ only a .40 for power. All I can say is most like a large model, which makes it she’s got a good hull and 800 sq. in. o f very easy to build as a scale project. wing area. After all, the wing loading When my OSPREY was completed, is light and more power for this scale she weighed 8 lbs., ready to fly. Due to airplane only equals more problems. the high thrust line and pusher config­ FUSELAGE uration, the OSPREY does not act like The sides are cut first and the longer­ an ordinary airplane. With power on, ons are glued in place, along with the the nose wants to pitch down, and up 1/4 inch square balsa strips. The formers elevator will have to be held in. This is are used to align these pieces. When quite apparent when taking off. When the sides are completed, they are glued reducing power, the nose will pitch to formers F4, F7, and F8. Author Dave seals up the radio compartment up. When the fuselage is square and dry, before another flight. Been wading, Dave? With these power changes in action, the sides are pulled together and the re­

MARCH 1974 7 FIN AND RUDDER joint. Light weight fiberglass strips 1/8 inch O.D. brass tubing and then The fin is made up of three pieces should be used with the Epoxylite. The epoxied to the elevator. Epoxylite fillets of sheet balsa epoxied together. Before construction may look weak but it has are used where the stab is glued to the these pieces are assembled, make a slot not yet failed. fin. in the 1/4 inch balsa center sheet for the STABILIZER AND ELEVATOR WING push rod outer tubing. The fin is The stabilizer and elevators are built The wing is built in three pieces; the epoxied together with the tubing in­ up in the normal manner and the stab two outer panels and the center section. side. The fin is glued to the hull and an is epoxied at right angles to the fin. Golden-Rods were used for the aileron Epoxylite fillet is used to fair the fin The elevator horn is made from brass connections. The wing sections are and the hull and to add strength to the sheet and silver soldered to a piece o f glued together with 4 inches o f dihedral

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\MA/G 5 Λ 4Λ/ <**T* A A C A 0 9 -so >*-r iwfosa ivr koo ^s. tfverv /r· ·?* «MW *«J a« COA/T. 0 3 Ai4 JT tt+ O * under each tip. The motor pylon is FULL SIZE PLANS AVAILABLE - SEE PAGE 72 epoxied between the two center ribs own, cowls are available at $ 18.00, post­ it in place. Finally 1/32 inch plywood and squared up. The A-1 pieces are age included. See address at end of is wrapped around the pylon with added to each side o f the pylon. The article. The right side cowl is epoxied Epoxylite, forming the fillet at the cowl motor should be fitted and the nylon to the engine pylon and houses the gas and the wing joints. tubing fitted through A-1 aqd the wing. tank (8 oz. RST). The tank is mounted TIP FLOATS Brass cable was used for the motor- with the tubing outlets facing the front. The tip floats are easy to build, the servo connection. GE Silicon Seal was used to hold the only problem is bending the wood. If FIBERGLASS COWL tank in place. The left side is remov­ the sheeting is well soaked prior to If you don’t feel like carving your able, using 4-40 nylon screws to hold assembling, it will be easier to work.

MARCH 1974

Although designed and built primarily for personal amazement, the Osprey could be used in both Sport and "Museum" scale . . . problem is, you'd probably have to bring your own pond I Basic structure is quite simple. Engine pod could be hollowed blocks or fiberglass.

Ambroid works well with wet wood. between the hull and the hatch will the forces work in the opposite direc­ FINISHING keep the hatch from coming out while tion on the engine. I wore out a plain­ I suggest that you cover the OSPREY flying. The radio switch should be bearing OS .19 when used with a pusher with Coverite. Use finishing resin on the mounted in the hull. Vaseline should prop. A 10-6 Tornado prop (PUSHER) bottom of the hull for a glass like sur­ be used where pushrods exit. is used with the .40 engine. face. ENGINE FLYING My OSPREY was painted with dope. A .40 is recommended as the only ROW . . . Hold full up elevator and Hobbypoxy would also work well. Col­ size. A double ball bearing crank shaft add full power. When the OSPREY ors are gloss white, orange and black. is a must if you want the engine to last. climbs onto the step, hold about one WATER PROOFING Most engines work with tractor props, half up and she will fly off. Don’t yank A must! GE Silicon Seal makes a in which case a single bearing is OK. it off. good seal between the wing and the Since the OSPREY uses a pusher prop, Continued on page 56 hull, and should be applied after paint­ ing the model. To make this, place a piece of plastic sheet (Monokote back­ ing or Saran Wrap) on the bottom o f the wing and tape it in place. Squeeze out a silicon bead along the hull where the wing touches the hull . . . Don’t skimp. Fit the wing in place and screw it down tight, then back o ff one turn. Let dry for 24 hours. Trim the silicon on the outside when dry. Before assem­ bling the OSPREY for each flying ses­ sion, add a small amount o f vaseline to the silicon before attaching the wing. To waterproof the cockpit, make a hatch from 1/4 inch balsa that is 1/16 undersized all around when fitted into the cockpit. Paint with black epoxy. Attach 1/16 X 3/8 inch strips of golden foam (adhesive one side) to the hatch edges. The fit should be tight. A 1/16 Elevater is operated by Nyrod linked to brass horn which is soldered to tube/joiner. We'd feel wire loop is epoxied to the hatch so better if a wire pin went through tubing into each elevater half. that it can be removed. A rubber band

MARCH 1974 11 C.M. Duffield, Thomaston, Texas, built this Stephens Akro from Oct. Ί 2 MB plans. The 52" span model is 5 pounds heavy (!), and is powered by a Fox .36 R/C engine. Designer Brad Shepherd test flew the ship and reports excellent results. RADIO CONTROL REPORT «κκ • Probably very few readers, when company sends me a poop sheet or take a test and all that. Soon came the they read this or portions o f any maga­ something in advance of a new item and superhet receiver and the spots we were zines, are aware of the agonies o f the I’m glad to include it in the column for alloted in the so-called CB band. The author/editor. It would seem that the the benefit o f my readers. Other manu­ CB band which, is dovetailed in and words just glibly slide from the mind, facturers; if you read this magazine . .. around our 27 mhz R/C frequencies has down the arms and onto the keyboard or others, there is a moral to the story become a monster, created by the FCC. and, like magic, the column gets written. I just told. It ’s written that the Good Lord It ’s not the actual writing that’s hard. I’ve often spoken o f being "shot created the Earth and Skies in six days, Heck, I can sit down and bang this out down” by faulty installation of a bat­ and if Bureaucrats had the job they’d on the typewriter in three-quarters of tery pack which becomes sensitive to in­ still be setting up the paper work and an hour (even allowing for my poor tense vibration and for all appearances, then make a mess of it. The bureaucrats typing) . . . No, it’s not the typing . . . the plane goes ape . . . then ka-blam . . . mistakenly thought about twenty years it’s the problem of what to write about back to kit form. Most often our ago that a business type band was a good and how to say it. Nobody just wants modeller, Joe Propnut cries out as his idea and they set it all up. It was easy to read about Joe Propnut who flys a plane goes in, "I ain’t got it . . some­ to get a license, you just applied and Glitchmaster 6 in his Yahoo powered by body’s on my frequency!" sent in the money, got a cheap trans­ a Grinder .58. No, not at all. The reader If Joe Propnut flies on the 27 mhz ceiver and began to play like the ham (we think) wants to know what's going band this is a definite possibility. Back operators. Since the majority o f CB on generally in his particular field o f when R/C was in it’s infancy you needed operators do not observe the laws, in interest and perhaps new products, new a Ham or Technician’s license and you fact they break the law most of the trends and a general commentary on (in were on the 50 mhz band. Then we got time they go on the air, they have liter­ this case) R/C. So be it. Now, again, 27.255 Mhz and you didn't need to ally become a menace. They use cute that old problem, what the heck to write about . . . As far as I ’m concerned, the majority of the manufacturers who make hobby stuff and R/C kits and equipment must be totally lacking in what makes for good PR (public relations). They will spend money for an ad and yet the old column editor is begging for them to send him advance info so he can give them a (get this) FREE plug and tell his readers about the product, and with a few exceptions, they completely ignore this “ goodie.” Whatever product you have ever read about in my column was the result of either the manufacturer sending me poop about a new product (you haven’t read too many, have you?) or just digging it up myself. One notable A rt Snyder, a regular R.O.W. flier at Lake Elsinore, designed and is building this beautiful flying exception is Kraft Systems; usually this boat for .40 power. Will be presented in MB and fiberglass hulls w ill be available.

12 MODEL BUILDER Nick Ziroli's "T-Jug" on slow fly-by. A pop­ Fred Van Kueren's P-51D taxi's out for takeoff. Sport scale or no, it sure improves the image ular Sport Scale kit. to see a pilot in the cockpit. .. that little something extra .. .

Another view of Duffield's Stephens Akro. A little squarish, but there's no mistaking the familiar lines on Jerry Puleo's Messerschmitt. Very popular R/C sport scale design. Ahem . . . er, the er, p ilo t. . . is leaning over to tie his shoelace . . . Right?

“ code names,” like "Cowboy” and metropolitan areas, the R/C frequencies therefore can’t be traced. Then there is “ Fisherman,” and such rot, rather than on 27 mhz are totally unusable. It some law in FCC regulations that states their legal call signs. Many use too much would do well for any R/C'er who sus­ that you cannot divulge the information power, and all manner of violations of pects 27 mhz interference to contact you hear over the air between two FCC rules and regulations. There must an amateur radio operator and ask him other stations (assuming you are just be close to three quarters o f a million to m onitor the R/C frequencies and see "listening in” ). So there you have it, a o f these misguided folks messing up the if such unlawful CB operation exists. real dilemma. airwaves with trivia. The FCC cannot Strangely enough, there is little you can Nevertheless, i t ’s an ill wind that control them or police the bands and it do about it but complain to the FCC. blows no good, and the R/C frequencies is obvious to anyone who monitors the You usually can’t tell them who it is, we enjoy are part of the Citizen's Band CB bands that it is bedlam. since the CB'ers in 99 out o f 100 in­ allotment, and I hope the CB’ers, by The CB'ers, and especially the indus­ stances do not use their Call Signs, and Continued on page 54 try they support, have wielded some real heft in Washington as far as legisla­ . X . . tion is concerned. Strangely, the FCC has, I have been told, been making life difficult for the Amateur Radio Oper­ ators rather than try to clean up the CB mess they (the FCC) permitted to come about. Radio Amateurs are a knowledgeable bunch, all capable of sending and receiving Morse Code. They often build and design their own very sophisticated stations, and their contri­ butions to the science o f electronics and their countless acts o f public service in emergencies spans many, many de­ cades. But I digress. The problem for the R/C’er is that many CB’ers find the clear spots between their channels on 27 mhz most inviting, and coupled with one or more crystal manufacturers’ mis­ leading advertisements, they set up on Old Sterling Wizards never die, they just turn up with new paint jobs! This one by Bob Cousins, the R/C spots. As a result, in many has Testors .40, Solarfilm with auto lacquer, contact paper trim, 4 coats enamel overall.

MARCH 1974 13 Winners at the O.P.R.A. Championships, Dayton, Ohio, October 14, 1973. (I to r): Dave Brown, Gary Villard, Bill Hager, Ed Nobora, Don Love, Bill Gademer, and Bob Gademer.

joyed the hard working assistance o f many of the members o f the Forest City Flyers. As well, we were fortunate to have Basil Derrough, Canadian Na­ PYLON tional Pylon Champion (and member o f the Forest City Flyers) as Contest Direc­ By TOM CHRISTOPHER FOREST CITY FLYERS, LONDON, tor. All-in-all the contest started well, CANADA QUARTER MIDGET PYLON proceeded smoothly, and ended success­ RACE, SEPTEMBER 30, 1973. By Bob fully . . . in no small part due to the Rayzak. extensive number of prizes which could "The Quarter Midget Pylon Race on be given out thanks to the generosity of September 30, 1973 was sponsored by the R/C manufacturing companies. It the Forest City Flyers of London, seemed everyone had a good comment • We received a couple o f interesting Ontario, Canada, to promote pylon to make about the contest. race reports from Canada and Ohio that racing on a larger scale than had been “ The airplanes flew the 2 mile, 10 lap we are going to cover this issue. The previously realized in Canada. The con­ course suggested at the 1973 Toledo first is a report by Robert ). Rayzak of test was attended by twenty entries R/C Conference and sketched in the Sarnia, Ontario, Canada. Sounds as from Canada and the United States, April 1973 issue of MODEL BUILDER. though these people really have a fun was blessed with good weather, and en­ Fuel provided at the contest was 15% organization up there! This coverage pertains strictly to Quarter Midgets, while the Ohio race report by Bill Hager will cover Formula I, Quarter midgets and Open Pylon.

"Better win this one. Marv Kowalewski, or Winners at Forest City Flyers 1/4 Midget race, London, Canada, Sept., 1973. (I to r): Larry Butt fix your own TV dinner tonight .. . TURN!" 3rd, Ernie Nikodém 1st, and Berney Polzin 2nd.

14 MODEL BUILDER Larry Literovich, St. Catherines, Ontario, and They gotta be kiddin'! How can those guys look that unconcerned with those two "turn letters" his Fox 15 powered Cassut. almost on top of them. Telephoto or no, those planes are CLOSE! nitro (supplied by Joe’s Hobby Center, aileron but continued on and won the It ’s interesting to note that the times, Dearborn, Michigan) and engine idle fly-off. As well, Tom’s Rickey Rat lost 'quality o f planes, and enthusiasm for was spot-checked. The models were not its canopy and dummy pilot and the event is o f the same caliber through­ processed for adherence to other stan­ finished the race with no difficulty. out this country. It’s what makes the dard rules, since in this area, Quarter “ Best time o f the meet was the 1:57 QM event fun, challenging, and interest­ Midget racing is still a fun event. We turned in by Ernie Nikodém. Ernie’s ing for spectators, and assures an inflow stuck to a rule o f "process by protest time was the only one o f the meet of new people in QM Racing. We are only,” and there were no protests. As under two minutes, but was followed sure that this club will have many more it turned out, the winners used standard closely by Bernie Polzin, Westland, successful events that we look forward designs which quite easily fit the rules. Michigan, at 2:05, and Larry Butt, at to covering! “Certainly a strong factor contribu­ 2:11. These times are as good as those The OPRA (Ohio Pylon Racing Asso­ ting to the success o f this meet was the which have been reported for Quarter ciation) was organized to promote all considerable merchandise donated by Midgets anywhere in the modelling classes o f model pylon racing in Ohio the hobby industry. Because of this press. and neighboring states. This organiza­ generosity, we were able to offer a "Following is a list o f the entries tion has enjoyed success due to the prize to everyone who entered. Tro­ who placed in the first ten, and a set of efforts o f Bill Hager and a very success­ phies supplied by the Forest City Flyers statistics gathered at the contest. The ful staff o f OPRA members. Two o f the were given to third place. The prize contest was so successful that it has races that enjoyed tremendous success schedule also included a large perpetual already prompted a Quarter Midget this past year were held October 7 and trophy to be retained by the year’s event at the 1974 Canadian Nationals!" Continued on page 52 high point flyer in local Canadian pylon PLACE NAME PLANE ENGINE POINTS BEST TIME contests. This perpetual trophy was 1 E. Nikodém P-51 K/B 15 1:57 awarded with first place this year and 2 B. Polzin P-51 S-T 13 2:05 hopefully will provide incentive for a 3 L. Butt Snafu S-T 12 2:11 formal Canadian racing circuit next 4 K. Polzin P-51 S-T 12 2:21 year. 5 T. Jacobs Rickey Rat K/B 12 2:34 "All twenty entrants flew their mod­ 6 V. Scanland Minnow S-T 11 els but six were destroyed by crashes. 2:30 7 J. Powers El Bandito S-T 11 The flying was smooth for the most 2:48 8 F. Maidment Snafu part, and there were no threats to S-T 10 2:43 9 R. Rayzak Bonzo K/B safety. The safety theme was further 10 2:47 10 F. Case Cassut S-T enforced by the pylon course being set 8 2:55 far away from the pit and spectator area. "U n til the fourth heat the contest was a tie between Larry Butt o f Forest, Ontario and Ernie Nikodém of Tona- wanda, New York, both having perfect scores. In his fourth heat Larry exper­ ienced a failure o f his rudder pushrod so could not take o ff and scratched that heat. “The end of the fifth and final heat saw a fly o ff required for third place between Larry Butt, Kevin Polzin o f Westland, Michigan, and Tom Jacobs of Garden City, Michigan. This fly o ff pro­ vided some exciting racing and included a gentle mid-air collision between Larry Butt’s Snafu and Tom Jacob’s Rickey Forest City Flyers contest organizers for QM races (I to r): Roger Sutherland. Larry Butt, Basil Rat. Larry’s Snafu sustained a broken Derrough (Contest Director), Floyd Maidment, and Bob Rayzak.

MARCH 1974 15 FULL SIZE PLANS AVAILABLE-SEE PAGE 72 hn h “DULR ws n the in was DOUBLER" “ the When • visioned by this ‘feller’ who dreamed it it dreamed who ‘feller’ this by visioned and flying sport for model combination asago, years a stages 7 some developing ol Capo Qatr igt racer Midget Quarter the become Champion eventually World would it en­ that hardly up was it racer, pylon small a his "L ittle Gem." ittle "L his 16 and Leftwich Austin combination! winning A Continued on page 56 page on Continued Proof o f the puddin'. This southern gentleman talks slow but flies fast! Austin set an AMA AMA setan Austin fast! flies but slow talks gentleman southern This puddin'. the f o Proof record in "single pylon" racing that held until the event was retired. was event the until held that racing pylon" "single in record OE BUILDER MODEL ■ i* H '

W m ta T W K ' MU" E S řiU ,

This one hits home! MB's publisher had his first instructions in model building from the designer of "Miss Delaware," Steve Kowalick. A smaller version was latter kitted by Ideal and called the "A ir Chief." Red Barrows, San Diego, built this R/C version of original.

p m SPA R KS By JOHN POND

• Spark ignition with radio control! tion type engine. Not a bad idea when metal) o f the box. This is important! Yep, we promised it several issues ago you consider the real shortage o f meth­ Ground only the shielding of the and thanks to Fred Collins, we are anol. First, try the shielded high tension coil wire leading to the moving points pleased to give you the details that will lead as explained by WCN last month in to the foil o f the box. Not the wire! work with any radio set. While it is his ’’Workbench" column. If that doesn’t Likewise, the coil wire to the nickle- true some sets seem to work OK with work, your immediate attention is di­ cadmium charging plug (if you use one). nothing more than a shielded high ten­ rected to the electrical schematic. This Again, remember, only the shielding! sion wire from the coil, there are others is fairly self-explanatory but as Fred With this, the high tension lead does that still get bothered no end by the sez, there are some things to pay parti­ not need to be shielded. However, a make-and-break ignition points. In fu­ cular attention to! 1/4 or 1/2 watt, 10,000 ohm resistor, ture issues, we’ll give you the latest First off, all wiring used should be no soldered to the coil end of the high dope on transistorized ignition and how smaller than No. 18 AWG . . . gets too tension lead, will cure any problems in it works. That’s a promise! hard to push that current down those this area. Right now, we are concerned with small cross section wires. Use shielded Some other observations: Do not the average Modeling Joe who wants to wire (No. 18 or larger, 51 RG is fine) use electrolyte capacitors or wax sealed fly his Old Timer using radio control, on the ground wire and ground the condensers, as over a period o f time, but in the classic way, i.e., with an igni­ shielding to the engine and the foil (or the engine heat could melt them! Be

Winner of the TOT (True Old Timer) award goes to Al Heilman, who Here's Al today with his new. Super Cyke powered Quaker. He did we see above with his first Flying Quaker and Baby Cyclone, 1937. a better job on the wing tip this time! SCIF member Al from L.A.

MARCH 1974 17 Some of the materials gathered together that Box takes shape. Corner angles ensure tight Completed box with components in place. are required for building shielded ignition box. solder joints. Plenty of room in Dallaire Sportster. careful in grounding the shielding not to avoid any shorting o f the shielding graph. If you have any doubts that this to short out against the wire. Fred used to its connections! Heat shrink tubing system works, rest assured, as the sys­ a foil lined box, but the writer and over the shielding prevents shorting to tem is the same employed by Maynard Red Barrows used sheet brass boxes. the wire. Some shielded cable has an Hill and Walt Good in their record Brass sheet will do the trick nicely and outside insulation. Collins also sez the attempts using ignition engines for econ­ is easier to get than copper sheets. aluminum foil he used is 3M Scotch omy fuel runs. Besides, brass is primarily copper with Brand No. 425, which is a pressure CONTESTS tin added. (Sheet brass is available in type. 3M Scotch Brand No. X-1181 No gas! Or darn little of it. This most hobby shops.) If you use foil, Copper foil can also be used. O f course, seems to be the theme on some of the you can make a balsa box. The impor­ copper is much easier to solder, but opening contests. The Phoenix meet tant thing to remember is to completely finding a source is a real problem. was cancelled because o f lack o f pre­ cover the box with metal insulation In wrapping up this discussion, while entries. Reports received by this writer (foil) to prevent the ignition noise from credit is due Fred Collins for the initial indicate gas was indeed hard to find in leaking out! A ll shielded wires are info, Red Barrows deserves a tremen­ Phoenix, as gas service operators would grounded to the box. dous amount o f credit in building up only open for several hours and then sell Inside the box, care must be taken several setups for the writer to photo­ only limited amounts, preferring to

Bruce Thompson, Toronto Canada, with his pretty red and white Beautiful ignition conversions of glow type Torpedo engines by Scientific Red Zephyr. Design w ill soon be Ο. T. of the month. Mark Fechner. See text for more info.

18 MODEL BUILDER Something about the roar of a Spitfire that draws a crowd. Lin Haslin Neatly cowled Ohlsson 60 in Sailplane being tuned by Noal Hess, kibitzed by Jay Jackson and Braid Anderson. A Bombshell, what else! Ralph Day holds on. How about those Bonneville salt flats! save it for the local citizenry. from the KOI meet. Jim Kloth reported Same story from Jim Kloth in his entries were down in Old Timers this report from Florida on the King Orange year primarily because o f lack o f local International contest held at Jackson­ modeler activity. In mentioning the ville. Jim was able to get to the contest rubber event, it goes w ithout saying, from St. Petersburg on a half tank of "Gorgeous Gawge" Perryman took this gas. He noted the lack o f Florida con­ event, closely followed by Jim Kloth's testants, but surprisingly enough, there twin pusher. were more out o f state entries. Inasmuch as entries were low in the So plan ahead, men! If you are going glow class, the .020 Replica class was to a meet, check with your auto club combined, giving a rather lively com­ to see what is open. It isn’t as bad as petition. The .020 models placed one, it is painted if some pre-planning is two, and three. Those cuties are hard done before leaving. Matter o f fact, at to beat! a recent control-line contest in Chula Jim further states that with fields Vista, the Contest Director was a station shrinking all the time, the .020 Replica operator, and opened up for those con­ class is gaining tremendously in popu­ testants in bad shape for a return trip. larity. Actually, as Jim has found out, On that same thought, the writer is they are a good way to relax from the approaching Gene Spence . . . the man highly competitive AMA and FAI who has made free flight flying available Events. Also noted was an .020 size at Taft . . . about this situation. The Sailplane employing a Mattel electric writer proposes, if possible, that one motor. We’ll get more dope on that "Newcomer" Jim Noonan, 1915 twin pusher covered with gold-beater skin! Great flyer. station be prevailed on to open only for good flying combination. out-of-town contestants who can show "THE BIGGIE” There are five R/C events and 11 free their entry slip endorsed by the Contest Received announcement o f the SAM flight events. The only events missing Director. Shouldn't take too much gas, Old Timer Championships to be held (as previously reported) are the Un­ but sure would alleviate that uneasy at Lakehurst, New Jersey, July 2, 3, and limited Flying Scale, and Texaco type feeling o f how to get home. How about 4 from the "Armenian Air Force Com­ events, where motor runs are limited that idea to attract the modelers to mander," Joe Beshar, one o f the Contest by the amount o f gas they can carry. Taft, Gene? Directors. There simply isn’t that much room Anyway, we seemed to have digressed Holy Smoke! There are 16 events! for long flights at Lakehurst. —

Know this twin? Photo sent in by Bill Schambers, who says it is one Bill Schambers also restored and photographed this Rogers powered of only 26 made. It's a famous name. American Junior Fireball. Still a pretty airplane.

MARCH 1974 19 020 REPLICA POWERHOUSE

Old Timer Model Of The Month Famous Sal Taibi design, reduced to .020 Replica size, by GENE WALLOCK, text by JOHN POND.

• This m onth’s design, the Powerhouse, by Sal Taibi, first appeared in Model Air­ plane News in September 1939. The model had been featured in many pub­ lished photos prior to his, notably for its ability to rise o ff water. Up to this time, most designs employing the Forster 99 engine, ranged in size from 9 to 12 feet in wingspan. Taibi was the first to exploit the power potentialities o f the Forster 99 in a smaller model designed strictly for the 1939 limited motor run events. The Powerhouse reflects Sal Taibi’s philosophy of model building to a tee; keep ’em simple and they simply fly! The construction o f the original Power­ house was simple, strong, and light; the main reason so many have been built. According to Sal, he actually built a smaller version o f the Powerhouse, but the details o f this design have been since lost in limbo. Attesting to the popularity o f the Powerhouse design, an English kit produced in the 1941-1945 era called the Air Master, put out by the Cloud Mfg. Co., was an absolute dead ringer to Sal’s design. A smaller version was alleged to have been kitted, but the author has been unable to find a trace o f this one. The Powerhouse design is so popular that since being accepted in the Antique Class, it has taken all places in this event time and time again. The model flies in the classic cabin method; left under power, right in glide. The .020 version being presented is remarkably similar in power pattern. Gene Wallock is responsible for the .020 plan being offered this issue. The model flew so well, that your F/F Flying Scale Editor, Fernando Ramos, had to build one. Fernando reports the model checked out almost perfectly on the first fligh t-on ly two test flights were required! This model will also make an ex­ cellent vehicle for the new .020 Old Timer Free Flight Replica radio con­ trolled event presently being proposed by the Old Timer Eagles for the S.A.M. Championships at Lakehurst. Using the small Ace Radio single channel system for rudder-only (weight is only 2-1/2 ounces), this ship makes an excellent competition model. In a 20 second engine run contest, who needs motor control? With the undercambered wing FULL SIZE PLANS AVAILABLE-SEE PAGE 72 section, the Powerhouse can be a threat from most any altitude. Try one and see!

20 MODEL BUILDER F/F Scale editor Fernando Ramos built this .020 Powerhouse from Fernando says his Replica Powerhouse was trimmed out by the Gene's plans. That's right, it's STILL a scale model! second flight. Anything looks that good HAS to fly I

Rocket powered King-Burd (1936), built by John Hammond, Bert Pond, Longmeadow, Mass., winds his 1929 Burnham stick A.C.C. Club, Baltimore. Maryland. model during Chicago Nationals. He won event! Also noted was the addition ot a new With the combined membership, the As if you haven’t had enough trouble event, Flying Scale, rubber powered. problem of contest officials is consider­ getting your gas job o ff water, the That should attract a lot o f the SCAM A ably lessened. Finding qualified (and SCIF-SCAMPS have also added a rubber boys where Peanut Scale started at Pink- willing to work) people is always a head­ event. Maybe a switch of events may ham Field. For entry blanks and info, ache. With such a joint effort, old timer change your luck. write Woody Woodman (the other C.D.) activity in California should enjoy a INDOOR OLD TIMER SCALE? at 389 Floral Lane, Saddle Brook, banner year in 1974. This is a new angle cooked up by N.J. 07662 (or write this management One o f the interesting things that the Willamette (Oregon) Model Club. if handier). The Bean feed starts at evolved from the joint managership is Here in California we don’t have to fly 4:30, July 1, at Fox Trot Circle on NAS the addition of rubber scale to three of indoors during the winter, so the idea Lakehurst. See ya there! the .020/Commercial combination con­ has never been tried. The WMC is going BIGGER AND BETTER CONTESTS tests. Rules for this new scale event will to include this with its February 10 In reviewing the contest schedule for be soon forthcoming. One thing for sure, contest. Is there no end to this O.T. Old Timers in 1974, special notice the event will be much more informal fun? Here are the tentative rules for should be given to the fact that, for the than the Flightmaster detailed type con­ other clubs that might be interested: first time, the SCIF and SCAMPS Clubs test. Emphasis will be on the Fly o f fly­ 1. Models will conform to the same are jointly sponsoring all contests for ing scale. (Look out, John! You're gonna categories as established by S.A.M. the year. This is simply tremendous! get yourself in . . . more trouble! wen). Continued on page 60

Phil Oestricher, Ft. Worth, Texas, built this prop-saving Yogi, Earl Welch and Brown powered Miss America at Willamette M.C. powered with a Torpedo .15. O.T. meet. Can you name ship in background? It's not a Sailplane!

MARCH 1974 21 Resplendent in metallic blue and opaque yellow Monokote, our O.T. Powerhouse from a Chuck Gill Models kit is all set to go. Completed model, with Heath radio and Enya 45 and Tatone muffler, weighs 5-1/4 lbs., dry. Picture taken in last week of January. Weep, Easterners! ΕΓΏ

□ U d POWERHOUSE In which our editor combines a product review of Chuck Gill Model's O. T. Powerhouse kit with some hints on converting those glorious birds of yesteryear into R/C O.T.'s. "Let your fingers do the chasing!" By WCN.

• We don’t want to get into a long dis­ vaguely resembles an ignition engine, floating glide back to earth . . . Comes cussion on the pro’s and con’s o f especially if you’re lucky enough to the first ” pro” for R/C . . . the glide is adding radio control to an Old Timer own a Champion glow plug, but once going to dump our balsa, plywood, free flight, but a couple o f arguments you crank it up, the pure image is silk, dope, blood, sweat, and tears hunk on both sides o f the subject might help shot. However, we may be well ad­ o f yesteryear into a beautiful grove of to clear the air ( If nothing else, that vanced in overcoming that argument tall maples . . . on Ebenezer Scrooge’s statement ought to please our ecologist- (See “ Plug Sparks” in this issue). property (before Christmas). A touch o f modeler). Next in importance to the nostalgic remotely operated down trim, accom­ Authenticity is the strongest “ con” value o f hearing the deep-throated roar panied by a turn, and holding, into the argument against R/C in an Old Timer. of a relatively low RPM ignition engine wind, would save the day. The radio switch isn’t offensive because hauling its aircraft into the air, we have Yes . . . to the purist, the thrill of it could pass for the ignition switch. the unequalled thrill o f watching our the chase may be gone by adding R/C And the elevator and rudder pushrods creation climbing skyward in a beauti­ . . . but don’t forget . . . today’s true can be made unobtrusive enough . . . But fully stable, circling climb, followed old timer free flighter is in his middle that glow engine is a dead giveaway! It by a smooth transition, and then a forties, at least, and (he fact that the

Sullivan 8 oz. tank protrudes into cabin area. Extra diagonal bracing on top and bottom Tatone muffler on Enya .45 has extension to Heath servos on Orbit tray. No crowding! make up for soft plastic covering. carry away ook. Royal spinner. Keil wheels.

22 MODEL BUILDER Left wing panel carries prototype of new Model Builder decal. Generous stab typical of free Rudder tiller arm for inside installation, and flights, and a great asset to those who are learning to fly radio controlled models . . . honest I coat hanger joiner for elevaters.

Spruce 1/4 sq. spars and webbing are small weight penalty in exchange Rudder pushrod runs through tube guide epoxied to side of fuselage. for stronger wing. Radio controlled maneuvers can add flight loads. Rudder tiller drops onto arm when tail is strapped to fuselage. initials for Purist Old Timer spells "p o t" rate, and now that the oil companies One more “ pro” and we’ll get o ff could very possibly relate to waist-line are playing footsie with our very lives the soap box, or (empty) glow fuel dimensions! It’s not as easy as it used (3 cheers for the truckers), it’s even barrel. Perhaps it ’s an unexpected by­ to be to run across meadows and more difficult to find room to turn a product, but O.T. R/C could be one of streams, through back yards, climb model loose on the elements. the best promoters o f R/C . . . except fences, shinny up trees, ride on the run­ Let’s face it, men, pure or not, R/C possibly gliders . . . to come along in ning board . . . is fast becoming a necessity to Old many years. In our opinion, there is no "What's a running board, Pop?” Timer free flight, and maybe the mod­ easier way to get into R/C flying . . . “ Get back to your Super Kaos, I ’ll ern generation F/Fer better take another and that includes gliders . . . than with tell you later!” look at Dick Mathis’ dissertation on an inherently stable, powered sport free . . . of a rollicking jallopy, etc. Not R/C-F/F at the 1972 NFFS meeting. flight. In spite of many ads to the con­ only that, our booming population has Maybe that wasn’t egg on his face after trary, the only true basic trainer for eaten up flying space at a frightening all (Flair yes, egg no!). Continued on page 57

Servo rails extend through inside sheeting. Sheeting and gussets rein- Providing hinged tail surfaces only requires the addition of a few force longerons at notches for landing gear. extra sticks of wood. Note wire on T.E. for reinforcing.

MARCH 1974 23 Charlie Gilbert "at home” in his well equipped workshop. The chopper is one o f his scratch-built designs, and excellent flier. CHOPPER CHATTER By JOHN TUCKER

• This month, I'd like to introduce a HUGHES “ 500” DESIGN CONCEPT bably be a better design from a model­ good friend, Charles Gilbert, who is not (PART ONE) ing standpoint, I fell in love with the only a master craftsman and design engi­ “ You know, I haven’t been fooling idea o f building a Hughes “ 500” . On the neer but an ardent modeller as well. The with model helicopters very long, but in “ pro” side, I listed the following: accompanying photos will give you an a short time I came to one basic con­ 1. The full-size helicopter has out­ idea o f his excellent workshop and his clusion: There are too many kit-chop­ standing performance and maneuver­ model building prowess. Charlie has had pers flying around and I yearn to see ability. the R/C Helicopter “ bug” for a long something different. 2. The fuselage would be quite time and has successfully designed and “ I'm the type of guy who runs out­ roomy for the installation o f any type flown two scratch built choppers with­ side every time I hear a helicopter fly of mechanism I desired. out benefit of plans or parts! After much over and visit the airport to see them up 3. I haven’t seen or heard o f any 4- arm-twisting, I finally persuaded him to close. bladed rotors being used on models. give me some details on his latest pro­ “ After weighing all the pros and cons 4. All the mechanisms could easily ject, the Hughes “ 500” Chopper, so . . . o f the difficult full-sized machines, and be placed “ o u t” o f the cockpit areas, lets have him tell it in his own words: even though some of them would pro­ and most of all . . .

Charlie puts the finishing touches on the window outlines of one of Rotor head components for the 4-bladed Hughes 500, plus O & R the molds for the Hughes "5 00 " he is in the process of building. engine, plans and Revell plastic kit. We'll keep you posted.

24 MODEL BUILDER Front end of Charlies "open air" chopper. Note belt drive, cooling Rear view of same chopper. Note double Sullivan tank. There aren’t shroud, sealed radio and battery containers. Very clean machine! too many secrets about the mechanics involved!

5. I like the looks o f the little at the top o f the fuselage. I remedied plug was waxed and polished and finally “ critter” . this by taking a plaster “ splash” of the ready to pull a m old.” “ On the “ Con” side, I listed the area to make a separate fibreglass part to Now, if that isn’t enough to whet following: be patched in later. The final shell will your appetite, just wait 'til the next 1. The tail boom is too short. be cut out and the separate fibreglass issue when he goes on to tell about the 2. The tail rotor is too small. piece set in place. mechanics, unique starter drive, and 3. There is a lot o f window area to “ Several more coats o f Superpoxy that 4-bladed rotor which he hopes will be vacuum formed. primer were then added, sanding be­ enable him to slow ro ll the chopper! “ With these bits of information tuck­ tween coats with 180 garnet paper and Here’s another item to add to last ed away, I decided to have a go at it. At then wet-sanded with 220 and 400 wet- month’s “ Kavan Report.” It concerns the nearby Fullerton, California airport, or-dry paper. After going over each of weighting of the main rotor blades on the Edison Company has several Hughes the filed grooves to make them uniform, the Jet Ranger. “ 500s” and they were kind enough to and after puttying the small cracks be­ After building and balancing the rotor furnish me with a sheet out of the tween the plug and the flat surface, the Continued on page 66 Maintenance Manual showing all princi­ pal dimensions and a small three view drawing. “ I scaled this up, and with the help o f a plastic model, shaped the two halves of the plug to make a fibreglass mold. First, the halves were sawed to the out­ line shape and then doweled together, at which time the side view contour was carefully followed. After many hours of chiseling, planing, and sanding, the two halves were separated and mounted on flat pieces of chip-board with screws from the backside. I applied two good coats of Superpoxy primer and sanded smooth. “ Next, all the windows and lines were carefully layed out. The window areas were relieved 1/16 inch to allow for the thickness o f plastic window material Tino Villanueva, with his Kavan Jet Ranger, at a parking lot "somewhere in Los Angeles." (I intend to use Butyrate). This material Helicopters could certainly be the answer to space and travel problems. will be vacuum formed over a plastic mold that I will take from the plug. Since the side windows bulge out on this craft, it was necessary to use epoxy body putty to build these areas up and sand to shape. Next, all the dividing lines are carefully filed onto the plug using a triangular, jeweler’s Swiss file. These grooves were then "burnished” smooth by running a fingernail up and down them. Great care was taken to be sure there were no reverse curves on the plug which would cause the mold to be mechanically unseparable from the plug. One area where there is a designed "reverse-curve” is around the rotor shaft

MARCH 1974 25 PHOTO BY LAURIE CONVERSE cover and made his own wooden deck. wooden own his made and cover strong enough to take the pressure, it it pressure, the take to enough strong essary, it will only add to the heeling heeling the to add only the nec­ will if than it hand, essary, stronger and other heavier is the mast On break. will not is mast the if Obviously, wind. able from Everything mast. a good of factors making understood least the of One • hatch aSoling-M adapted Don 679. No. BarbaraSanta winning championship author's The s h aon of ntblt ta is that instability f o amount moment the Heeling is yacht. the f o moment avail­ the to presented is sail of to isamount greatest the mast that so place the in sail the f o hold purpose The been success or have f failure. degrees o varying the with broomsticks tried is to toothpicks construction yacht model in carv­ of out takesmystery the sailing . .Our editor PROUGH. DON By sheet main ul it ay ot ih hns above things with boat any into built ing your own mast. It's easy if you know how . . . sohere's how! . . . how know you easy mast. It's if own ingyour 26 s sal lmtd o od n alumi- and wood to limited usually is yacht cannot live up to its potential potential its rigged. to up poorly live if cannot yacht tremes, it is obvious that the model model the that ex­ obvious the is f o it Regardless tremes, waterline. the best by far. See text. far. by best he yia ms rs-etos N.3 is 3 No. mast cross-sections. typical Three The choice of mast making materials materials making mast of choice The i. 1 Fig. Fig. 2 Fig. Fig. 3 Fig. ces ht od h ftig i place in fittings the hold that screws time, same the at and weight, cess can mast the that is wood f o advantage display to able be ill w wood Secondly, determined by the rigging style of the the of style rigging yachtsman. the by determined factors cost The tubing. titanium and steelstainless include options other The eesr fr oto. od lo has small also the as; Wood such disadvantages, some control. where for flex necessary can mast the that soshaped important most and last shaped who The choice. mast. craftsman the the third f o pride poor the very a pine with make these items less common than than common less items these make e aee ad hpd o lmnt ex­ eliminate to shaped and tapered be choices, best two the and are Spruce cost. fir being Douglas one major the that any given type of material offers is offers material of type control given f o any that amount The be. should they availability. and cost f o because num, tubing, fiberglass fishing pole blanks, blanks, pole fishing fiberglass tubing, Recommended tapering woodenfor masts. od at hv mn advantages, many have masts Wood -mA U-1/8" - U otne npg 62 page on Continued OE BUILDER MODEL The sleek and graceful lines of the Y10-43, sitting in the sun at Clover Field, Santa Monica, Feb. 18, 1933, are evident in this photo. DOUGLAS Y0-31C/Y10-43 *S

• The one and only YO-31C was orig­ inally the fifth airplane o f the five YO-3I A's (MB, Jan. 1974), but so many design changes were made that it was given a new designation letter. The most apparent change was in the landing gear. The old split gear was replaced with a cantilever leg and low pressure tires in large fairings similar to the type used on the Curtiss Hawk P-6E. The cockpit was widened at the shoulder line and a blister added under the ob­ server to give him more room to work in. The result was a considerably cleaned up airplane but it still had the trouble­ some gull wing. The ‘C’ served with the 1st Wing at Langley Field and the 99th Observation Squadron; it was still in existence in 1947 at the University o f Illinois where it had been used for several years in classroom work. This short nose Y10-43 was the prototype of the 0-43A series. (Pete Bowers photo.) The number T in Air Corps designa-

Beautiful picture of a beautiful airplane. The YO-31C at Wright Field in the wintery snow of 1932-33.

MARCH 1974 27 4 · 2 * 2 · 4 · '4 · t h is

+ 1 4 · 4 3 3 0 ' + 4S SO' in Z3,000' 3 1 · SO 190 MPH 3 9 -S SO ' 22 ,7 0 0 ' 9 GALS. 9 GALS 29 9 SO' 332 SO'

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o m p a n io n VO-9IC SPECIFICATIONS Y P -4 3 SPECIFICATIOMS — C HIGH HIGH S SPCEO. C. WING WING LOAOING PERFORMANCE SERVICE CEILING AUXILIARY FUEL WING AREA OKORAL SWCCPBACK INCIDENCE VERTICAL AREA SURFACE WEIGHTS WEIGHT EMPTY USEFUL LOAD MAIN FUEL OIL BRUNSONS HORIZ SURFACE AREA WEIGHT GROSS HIGH HIGH SPCEO, S.L VERTICAL SURFACE ARCA WEIGHT EMPTY GROSS WEIGHT SERVICE CEILING AUXILIARY FUEL DIMENSIONS WING AREA ORAL DIME SWCCPBACK HORIZ SURFACE AREA WEIGHTS WING LOAOING PERFORMANCE OIL INCIDENCE USEFUL LOAD CAPACITIES MAIN FUEL o te N SERIES ARE (I) Υ 0 *3(3 ΙΑ ) /0 ·3 THE ΙΒ ; 0-4ΑΛ (2) 0-4 3 A ALLANE A Γ - I FOOT SCALE ______DIMENSIONS TAKEN FROM OR SCALED FROM ORAWIHGS FACTORY DOUGLAS ytsTBuRG *.Κ» Y0-31C/Y10-43 ­ c a n t

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o r ig in a l l y - through 32-291 32-291 BETWEEN BETWEEN SEA’S 9 0 # A I3 A /Í % LANDING GEAR 0 WITH JULY,‘82RE PANTS. LIVE 0E TO WRIGHT FIELD WITH OLIVE ORAB FUSELAGE. YELLOW WINGS A TAIL. ' t il e v e r IN SERVICE LATER WITH THE i ST WING NOO . GNO AIR FORCE AT LANGLEY FIELO, VA , I? H A D A STANOARO »LUC FUSELAGE Y0-3IC Η 31-608 I2TN, 2 2 NO * TH 99 OBSERVATION SQUAORONS » L W W · . YCLLOW A WIWOS TAIL »A S CHANGED TO Y10-43 GULL WHf.N WING WAS »V REPLACED A PARASOL WING FLO »» BY YKM3. These plans These first published in the October of 1973 WINGS issue magazine. OIL PRESTONE EXPANS. TANK GENERATOR GENERATOR CARS AIR PRESTO« or -L THRUST

Copies of the original 28 x 40 inch drawings of the Douglas YO-31C/Y10-43 are available at S4.50 a set.

rs) oo Order direct from PETER WESTBURG, 834 Seventh St., Santa Monica, California 90403. MODEL BUILDER MARCH, 1973 SHEET 2 OF SHEET 3 (fULL SIZE) U——J CROSS SECTION Oř KAOCO SKIN USED ON USED STABILIZER A ELEVATOR PtTt« »esTawo DOUGLAS Y0-31C/Y10-43 zol zol n l ITI ITI '«I View ΥΙΟ-43 TOP 01 AM AM 01 % 50 TOP A BROWNING BROWNING IS INSTALLED THIS COVER USEO WHEN SO CAL

MARCH 1974 'yUUUUUJUUUBlJ > 2 » » f - ■ w m j p I w — L ■ L a i . B B l e IP l 41Ν3Λ «ΛΟΟΝΙ* «ΛΟΟΝΙ* ItøJOOD INOtti MJIA C.lOlld MJIA e in w ie n o ίβ β Ι f S. W.S » C C PK SNOttÄNOl N3M1N SttOOlNOO 3IC-0A 3 IC-01 3 These plans These first published in the October 1973of WINGSissue magazine. Sti000 JttVU JifWOVWd· *)Vtt03MI0 u v i t i V S « f» lN 0 3 JO AHOttj — r = ·· p s m .

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Copies of the original 28 x 40 inch drawings of the Douglas YO-31C/Y10-43 are available at S4.50 a set. > a o C Order direct from PETER WESTBURG, 834 Seventh St., Santa Monica, California 90403. MODEL BUILDER The almost perfect lines of the Y10-43 with the original YO-31A vertical tail make it one of the most beautiful airplanes ever designed. Enough to make any good modeler's fingers start to itch! tions had nothing to do with physical differences between airplanes; it indica­ ted that the airplane had been purchased with supplemental funds instead o f the regular fiscal year funds. Five Y10-43’s were purchased in this way. A t long last, the gull wing was changed to a center section on a level with the pilo t’s eyes, the wheel pants were discarded and the original YO-31 A vertical tail was used. In spite of the cabane, the airplane had classic lines; the ugly duckling XQ-31 grew into one of the most beau­ tiful airplanes to grace the skies. But they were unlucky airplanes; No. 4 crashed in 1933, No. 1 in 1935; No. 5 in 1936 and No. 3 in 1939. Only No. 2 survived and it was turned over to an Lone YO-31C in service w ith the 99th Observation Squadron. Mitchell Field, Long Island. Long aircraft maintenance school in 1941. · stacks were added to eliminate glare during night flying. Number put on before stacks.

A Y10-43 while in service w ith one of the squadrons in the 12th Observation Group. (Pete Bowers photo.)

MARCH 1974 31 PHOTO BY Bl LL WARNER aiona hr ae xetoa model­ exceptional are there California ae hs is article. first this f case o in employ they techniques the f o some (seeplans Classifieds). Models Modernistic from Warner Gnat" ot "H Bill by constructed KR-21, Scale Fairchild Peanut ers, from whom one can learn many many learn can one whom from ers, Southern in all instance, For flying) and around. year building (both modeling them apart from others. Such is the the is Such others. from apart them bountiful is there where area an in ship. R/C Biplane Sport excellent make could this up, Blown apart. inch ahalf about be Must ribs! those all at Look hi ottnig oeig ht set that modeling outstanding their share to individuals to these time ask from to time, intention, my is It things. living to advantages many are There • hisin respectedknowledge isafor highly man who over to his column of most Fernando turns month, This h ujc,“Hnln,wnig n trg frbe oos b LRNE MATHER. CLARENCE by . . . andmotors" storagerubber winding, Handling,of “ subject,the SCALE FLIGHT FREE 32 o te at ee yas hv had have I years seven past the For Clarence excels in all phases o f model­ f o phases all in excels Clarence ahrs ehd of adig storing, handling, f o methods Mather’s modeling, and his numerous victories victories numerous his and modeling, eiin fyn irfl models. microfilm flying com­ petition, International in U.S. the presented event. rubber scale a lose I have him seldom seen and contests, in Mather elc ti. h floig r Clarence are following The this. reflect ih. e s ut sros bu his about serious unbelievably quite is He and light. handicrafted fully n. e a, n eea ocsos re­ occasions, several on has, He ing. Clarence with flying of pleasure the lrnes cl mdl ae beauti­ are models scale Clarence’s y ENNO RAMOS FERNANDO By cally, a Peanut scale model, built of of built model, scale Peanut a cally, any find can you if but itself, in story rae. sre of ie sol be inches. should 0.010 sizes f o f graduations o in series stocked A greater. other Some Pirelli. good to refers This plastic a utilizing and tissue and sticks rubber the affecting factors the of some and weight, and size, type, experience. model past The on based estimate an can conditions burst power and cruise it yet tests, power low for motor a such loop short a use rubber, new or model then not, If go. to way the is it Pirelli, for intended are and experience, his on scale for basedare opinions ideas motors and His models. rubber f o winding and rp wl fy n ubr rm one-six­ from rubber on fly will prop, Typi­ model! the fly to is way surest are pitch and diameter propeller the issize. wrong rubber the is it much the if wasted not that Also, so observed. be turns sufficient take will new a with tests first For alternatives. whole a is former The considered. be him. from dealagreat learn us . can . of . all flying However, powered rubber in beginners rubber may be thinner, or o f lower lower f o or thinner, be may rubber The important. the also is but . . . quality model rubber a f o requirements wind hand to easy is It peg. to rear hook the prop the from reaches just that sizeshould as the as well quality rubber o’ wry bu te ubr getting rubber the about worry Don’t be to have ill w width the and torque, wide. inch an f o one-eighth to teenth your be ill w Dolby or Sig, Filatti, n aig p rbe mtr the motor rubber a up making In “ ht ie o s? frt t il be will it first t use? A to size What “ OE BUILDER MODEL old before you use it. Some o f the best rubber I’ve had was six years old and ten year old rubber may be excellent! Store the rubber in plastic bags. It is better to use too small a size than one too large so make up such a loop. Allow two inches for the knot. “ The knot is o f great importance, so tie it well. Avoid getting any sort of oil on the rubber before tying the knot. This means that clean fingers should be used! Fold the rubber strand upon it­ self, forming a loop (Fig. I). Tie a loose conventional knot in the double strand near the cut ends (Fig. 2). Work saliva into the knot by chewing. Then pull the knot very tight... right to the breaking point o f the rubber. "Such a knot will hold quite well by itself . . . but one of two added steps is recommended. The easiest one is to moisten the loose ends o f the loop and tie a square knot against the first knot, also pulling it very tight (Fig. 3). Such double knots hold very well. "A n alternative step is to tie the rubber with thread instead o f using the square knot. A partner grips the cut ends o f the rubber with a pair o f pliers and stretches the rubber very tight. You Waco SRE in Peanut Scale, crafted by Fran Kastory of Pittsburgh, who used Earl Stahl plans loop moist thread around the taut reduced about 1/3 to get 13" span needed. Mooney's Peanut SRE was in the Nov. ”73 issue. rubber twice, right next to the knot, and tie securely (Fig. 4). In both cases models is more enjoyable if you develop difference between the various mixes o f trim the loose ends to one-eighth o f an a liking for the flavor of rubber and lubricants. The commerical mixes are inch o f the knot. lubricant! Then tie the rubber with the excellent. A mixture o f green soap and "Larry Calliau places the thread on knot and thread method previously de­ glycerine is the old standby, and a the loop side of the knot, but most scribed. Never trust a single knot on fifty-fifty proportion is fine. Green modelers place the thread on the cut such rubber. soap is usually available only as a end side. Larry has had excellent service “ In all cases, install the rubber motor tincture which means it is an alcohol with his method. )im Richmond uses so the knot is out o f the way; behind solution. The alcohol should be boiled no knots in the rubber, but just holds the rear peg or hook. off, and that is a smelly operation! the ends with thread and a little Plio- “ Rubber should always be well lubri­ Castor oil also is an excellent lube. I bond glue! Don't be surprised if you cated before using. The rubber must be prefer the soap mixes because they can have difficulty making jim ’s method wet all over. Many modelers lubricate be washed o ff the rubber more easily hold. He has some extrordinary talents. their motors a day or more ahead of for cleaning and retying. "Sometimes it is desired to tie rubber time so that the lube can soak into the “ Store motors individually, labeled that has been lubricated. First wash off rubber. I ’ve never been able to notice according to size and the rubber source. as much o f the oil or soap as possible. any difference between such motors The small brown envelopes sold in Then chew the loose ends for several and ones lubed just before winding. stationery stores work well. The two-by- minutes . . . flying rubber powered Also, I ’ve never been able to notice any three inch size is fine for small motors, and the three-by-five inch size for larger ones. “ If you are new to rubber powered models, practice winding at home. The commercial sixteen to one winders are excellent (Marlow Engineering, see ad, makes 'em. wen). Small hand drills may be satisfactory if the gears are tight enough, but the low ratios o f three or four-to-one require many cranks to fully wind a long motor. The type with two small gears on the shaft are much more likely to work well than the cheaper, single small-gear type. Be certain that the hook is securely chucked! Mount a screw hook on the wall or bench to hold rubber for practice winding and for breaking in motors. Remove any burrs from the hook by filing or sand­ ing. Stretch a lubed motor three or four times its length before starting to wind. Crosby CR-4 built by Pres Bruning is one of the Cloudbuster Venture "Race Wings" plan series, see their ad in this issue. Span of this rubber ship is 20 inches. Photo by Tom Hoyt. Continued on page 54

MARCH 1974 33 community of interest to enjoy satis­ factory, and stimulating model flying.” Perhaps the most unique concept of proposed organization is the fact that each member will be able to "reserve” certain aircraft types for his exclusive use, from a list o f some 1012 available. Highly detailed guidelines have been formulated by Commissioner Taggart, which provide informative, if somewhat puzzling reading for the flying scale model fan. We are hardly certain that the whole thing is not a ” put on” (I'll buy that, wen), but the concept is cer­ tainly different than anything we’ve previously encountered. Doubtless, a stamped envelope would bring you a copy o f this truly unusual prospectus. N.A. Taggart, 60 Park Lane, Chagrin If it flies, it just might land here Falls, Ohio 44022. Cont. on page 61 DOWN UNDER MODELLING Received a letter from Alex Toth, who recently returned from Australia, with this report: “ Visited one o f the biggest local hobby shops, where I was sold bass wood as 'sheet balsa.' When I requested the 36 inch long sheets be cut so that they could more easily be managed on the crowded train, the salesman broke them over the counter’s edge! Next, I purchased an Aussie kit, spanning 30 inches, and was horrified to find the C.G. location shown on the plans well ahead of the wind leading edge! Howz- zat!"* R.C.P.S.M.A.S.? A Radio Control Performance Scale Model Airplane Society is now open for participation. So begins an announce­ ment from N.A. Taggart. The aim o f the society is: " . . to review aircraft types by experiencing similar achieve­ A close-up of Paul Cherubini's cute little Peanut Laird "S olution" shown here last month. Used ments with models; and within this Cleveland plans, but "Megow-ized" the structure. Flies 45 stable seconds. Bob Clemens photo.

Greve Trophy Race at Flying Aces Club meet in Connecticut. Clever idea . . . no clock needed. All launched at the same time. Winner is simply the last one down! Overall winner by heat eliminations, as used in R/C pylon, etc. Chester "Jeep" by Chet Bukowski (foreground) was eventual winner here, averaging one minute flights! Caudron by Don Garowfallow, "Ik e " flier unknown. Photo by Bob Clemens.

34 MODEL BUILDER Low aspect ratio wings provide plenty of Note how stabilizer slot is widened at front to allow for incidence adjustment. Classic lines of area within the 13" span limit. the SE5 make it an excellent Peanut flier. Way back, the Megow kit was one of most popular.

PHOTOS BY FUDO TAKAGI PEANUT SE5 By WALT MOONEY Sometimes we tend to overlook the obvious, and what could be "obviouser" as a choice for the most appeal­ ing and nostalgic scale biplane of all times? Still managing to be a little different, it's the SE5 model, no "A ". • There have been a lot of models o f section of the top wing. The forward center section ribs. These are supposed the SE5A, but not too many models of pair are vertical in the side view and the to just fit on each side of the fuselage. the SE5. The SE5 is a little simpler than aft pair are hiding behind the rear wing The top spar is removed between them its later version, and makes up into a struts. Cut out a little of the top fuse­ and of course there is no covering on very nice Peanut Scale. It has plenty of lage sheet covering so the cabane struts the top between them. The bottom dihedral, lots o f wing area because of can be cemented in place on top of the wing is simply cemented on the bottom being a biplane, and good nose and tail upper longerons. It may help to make a of the fuselage. lengths considering that it is a World jig block to hold the top of the cabane Check the wings before all the ce­ War One aircraft. struts while they dry. This can be done ment is dry to see that they are parallel The model is fairly simple for a bi­ by taking a piece of 1/8 sheet balsa the when you look down on them from plane, so the discussion that follows size of the center section and cutting a above. will just touch on the more difficult tight notch at each location for the top Note that this SE5 had short exhaust features. The aft end of the fuselage of a cabane strut. Push the lop of the stacks and no head rest. It also had sides are constructed with a slot for the struts into these notches and then ce­ quite a large windshield. horizontal tail. Note that this slot is ment their bottoms in place on the And now, on to another subject . . . wider at the front than at the extreme longerons. This jig block is easier to A question that we are often asked is, aft end where it is only deep enough locate than the whole top wing. It can ‘‘Where do you find this or that model for the tail. The extra room at the front be twisted and nudged into perfect supply?” Another is, ‘‘Where do you of the tail slot allows you to shim the positioning before the cement dries. come up with a three-view?” I suspect tail leading edge up or down as required When the bottoms of the struts are that our illustrious editor won't let us for flight trim. firmly in place and the cement is really have enough room to give complete an­ Mounting the wings is perhaps the dry, pull the jig block o ff the top and swers to these questions (Try me. wen) most difficult task. There are four cement the top wing in place. but we’ll have a little go at it. cabane struts to support the center- Note that the bottom wing has two Continued on page 64

Coming next month, the Stinson Tri-motor A trimmed North Pacific plastic prop takes the pain out of carving one. Thin monofiliment Model "U " by Don Butman. fishing leader makes fine rigging wires. A little detailing goes a long way.

MARCH 1974 35 1/16ΤΗ BY 1/8TH LEADING EDGE COVER WITH LIGHTWEIGHT TIS S U E , NOTE ROUNDÁL PO SITIO N AND RUDDER STRIPES

POWER WITH ONE LOOP OF 1/8TH OR 3/16TH RUBBER

WING T IP PIECES AND GUSSETS ARE I / I 6TH THICK BALSA WINGS I/I 6TH BY 1/8TH TRAILING EDGE

TOP OF FUSELAGE BACK TO FORMER " F " * = IS COVERED WITH 1/32ND SHEET BALSA G MAKE CYLINDER CENTER R IB ( 3 ) REQ»D. MAIN RIB ( 1 2 ) REQ*D. B,C,D,E, STACKS MAKE RIBS FROM I / I 6TH SHEET BALSA

1/32ND SHEET BALSA FORMERS m w

1/4TH SHEET TOP CENTER STRINGER IS I / I 6TH 1/8TH BACK PLATE SQUARE? OTHERS ARE 1/32ND SQUARE.

NOTE THE DIHEDRAL ANGLE.

PECK POLYMER THRUST BUTTON 1/32ND SHEET BALSA T A IL SKID . HUNGERFORD OR 1/32ND DIA. PIANO WIRE WILLIAMS BROS. J HORIZONTAL FOR LANDING GEAR — WW I WHEELS 7 . . . 11 DO NOT CEMENT TO THE Λ LG STRUTS. 1 ALL PIECES ARE / / \ I/I TH THICK II V \ II 6 \ ______Δ

MODEL BUILDER MARCH 1974 Winner of the 1970 Coupe d'Hiver International event held annually John Mace, Seattle, Wash, and ST .15 powered "Yankee Doodle," in France was Jacgues Griveau, shown here with winning model. an FAI version of the Goldberg Sailplane designed by Phil Hainer.

By BOB STALICK

• Here it is . . . March already. Since hats, here goes try number three. MYSTERY MODEL OF THE MONTH the January issue of M.B. just hit the DARNED GOOD AIRFOILS The February Mystery Model was stands a few days ago, I’ve had the The foil of the month is the NACA Stan H ill’s Amazon 400, which was chance to sample some opinions of my 4407.5, which is a 7-1/2% version of the kitted by Berkeley in the mid-50’s, first M.B./F.F. column. I went to the standard 4409. This one is specifically although the kit version had an under­ local seer and Rrognosticator, J.W. Phog- designed as a power model section for slung fin instead of twin fins as on the bound, and asked him for his opinion AMA Gas, although Rolf Hagel used a original. This month’s model is one of on how the first issue went. I asked, very similar foil (with a pointed and the first high performance Unlimited "H o w ’d it go?” To which he responded, raised L.E. entry) on his FAI power Rubber models developed in the U.S.A. "There’s only one direction remaining. winner at the 1971 Internationals. This PLAN OF THE MONTH Try again.” I thought his comments section would also be in the ballpark for There are models which have earned were intentionally vague, but with re­ a stable, windy weather A/2 or Wake­ a good reputation, but for some reason, solve, I determined that I would follow field. In fact, it ’s just a good all-around- have never hit the popular modeling them, and try again. So, hold onto your er. Try it on your next one. press. Such a design is Al Riches'

/

Winner of the 1973 Northwest A/2 semi-finals, Wayne Drake, with his "Sky Spangled Star Banger." Photo by Bob Stalick.

38 MODEL BUILDER Mountie A/2. This ship is loosely based on Mike Woodhouse's Wichita series, and it has been a potent machine in the hands of Alan and his flying buddy, Ernie Avery, of the Vancouver (B.C.) Gas Model Club. Alan placed 7th at the 1967 Internats with the identical model shown on the three-view. Although addition o f the fibreglas boom in later versions has added strength to the fuse­ lage, the original is a bit more thermal sensitive due to its lighter load in the tail section. This is an ideal starter model for A/2 as it is of conventional construction and performs exception­ ally well in all conditions, coming into its own in light lift or thermal activity. TOWHOOKS While on the subject o f gliders, one shouldn’t overlook the importance of a good towhook. Several sketches of tow- hooks you can construct yourself are included this month. What is important in any hook design is the ability to tow Dick Dolby at Bong Trials, FAI, 1968. Model by Ed Dolby, Phoenix, Arizona. straight and kite the model when it’s close to the top of the line .. . without the towring falling o ff . . . coupled with the ability to get the model o ff the line easily at your command. Each of the sketches show different ways o f achiev­ ing this end.

1/16 Music wire ground to a point- reshaped as shown

The Evans design (No. 1), suggested to me by Ron Evans, uses a basic FAI Models Towhook assembly, with the wire replaced by a slightly longer piece of 1/16 music wire ground to a fine point and bent as shown. A sharp tug w ill flex the hook, allowing release on command.

Phoenix club members at the best model "fie ld " in the country, the dry lake bed, Blythe, Calif. retainer The Crowley design (No. 2) uses two back, allowing the ring to press against wires. One is 2 m.m. music wire and the retainer wire, flexing it down to forms the basic hook. The other is a release the ring. lighter piece of music wire, approxi­ The Lenderman design (No. 3) is the mately 1/32, which is soldered to the FAI Models hook with rubber band simplest of the three. I use this one my­ basic hook and bent to shape as shown. retainer (band is held to fuselage by self on an FAI Models Towhook assem­ Its use is that of a retainer for the tow­ small wire hook- then looped over bly, and it works well. Essentially, it’s ring. Release is by pulling down and end of towhook). Continued on page 70 Darned Good Airfoil - The N.A.C.A. 4407.5

STATION 0 1.25 2.5 5.0 7.5 10 15 20 25 30 40 50 60 70 80 90 95 100 UPPER 0 1.53 2.24 3.26 4.08 4.76 5.83 6.61 7.16 7.50 7.62 7.21 6.42 5.30 3.88 2.14 1.15 .075 LOWER 0 -.84 -1.08 -1.23 -1.23 -1.16 -.90 -.59 -.28 -.01 .37 .58 .80 .71 .58 .31 .13 -.075

MARCH 1974 39 40 MODEL BUILDER £ NATIONAL FREE FLIGHT SOCIETY NEWS

NFFS MEMBERSHIP BOOK The new membership book is now available for $1.50. The book will be especially helpful to members who are moving and want to find other free- flighters in their area. Free flight clubs having contests will find it useful for Scotty Harte releases Hawkeye 1/2A at mailing out flyers advertising their con­ Fresno Annual. tests. Manufacturers, of course, will desire a book for mailing out catalogs. to be a super sophisticated type. One Anyone wishing a NFFS membership member of the group, Dick Swensen, address book, send $1.50 to: B.J. Kelch, built a modified FAI “ Pearl" and is now R.R. No. 4, Box 475, West Terre Haute, qualified to participate in the team fly Ind. 47885. offs this summer. He did this by coming NEW ASSOCIATE V.P. in first at the semi’s at Bong last year. Hardly Brokenspar, our notorious The trick to winning a place on the Executive Director, has been appointed 1977 team is to START NOW! AM A Associate Vice-President. The CLUB CONTEST PRIZES National Free Flight Society is working Ken Johnson and his rubber Coupe ď Giro The contest season is coming up fast very hard to establish a closer line of or something. Photo by Carl Fries. and I'm sure that clubs across the communication with AMA, and this country are making plans for their learned at those meetings, my sheeted, appointment puts us just one step closer. club contests. Memberships in the Na­ glassed Excelsior wing weighs only 7-3/4 Our congratulations to Hardy! tional Free Flight Society make ex­ oz., and I have one 90% completed cellent prizes and may be ordered early. 1977 FAI WORLD CHAMPIONSHIPS that will weigh under 7 oz. Rather than spend 7, 8, or 9 dollars on , Now is the-time to start planning and The single most important conclu­ a trophy, why not spend 6 dollars on building for the 1977 FAI program. sion that came out of those meetings a membership in NFFS. If the person The fly offs will start in the summer o f is this: Build an aircraft and fly it. Then who wins is already a member (which 1975, with the final team fly offs the fly it again and again . . . 50 or 60 is usually the case!), we will just extend following year. flights on one air craft is not even his or her membership for one year. A plan of attack that some members enough. You must know exactly what Another thought would be that in of the Bong Eagles started was, I believe, that plane is going to do in all situations. addition to a small trophy, the Juniors an excellent one. Bob Whaley, then A note book must be kept and every be given a one year membership, it only President o f the Eagles, suggested that flight must be logged. List items such costs a buck and I know they will love anybody interested in FAI power air­ as temperature, humidity, prop, engine it. Pictures of NFFS membership win­ craft meet at his house to talk. The rpm, wind speed, whether it was sunny ners will appear in this column . . . if result of that meeting was a small club- or cloudy. the contest director w ill mail them to within-a-club. Meetings were held every The aircraft you build does not have me. 2 weeks and each member was given an area to investigate, with a report due NFFS MEMBERSHIP AND RENEWAL APPLICATION at the next meeting. A complete com­ (Make checks payable to; National Free Flight Society) parison of all previous FAI power win­ Mai! to; ners was made. Nose and tail moments R I Kflrh RR4 Rnx 47S were compared, as well as areas, pylon W. Terre Haute, Ind., 47885 2 yrs heights, airfoils, building techniques, 1 yr material strength, finishes, mechanical RESIDENTS OF FOREIGN COUNTRIES S6.00 $11.00 devices for A/R and V.I.T., engines, Age 19 AMA Members 6.00 11.00 U.S. and up Non-AMA Members 7.00 13.00 props, etc. Every known detail of power RESI- Age 15. 16. 17. and 18(Senior) 350 6.00 winners was thoroughly discussed. DENTS Age 14 and under(Junior) 150 250 Rather than try to design one plane Family membership* 1.00 2.00 and have everyone build it, the decision All members receive NFFS Digest. Name AlMA No. was made to let everyone build the air­ Family membership fee includes craft they thought had the best chance. all additional family members, but Address no additional copies of the Digest. Some chose flappers, others went with Ages are as of July 1 of current City. State Zip elliptical tips, some with squared-off, year. Please circle applicable fees. simple designs. Many o f the things that New Member Q ’ Please list family members the Eagles decided in 1969 were neces­ Name Renewal O sary for a winning aircraft, are now more common in this country. One Address Change □ AMA No. example is fiberglass covered sheeted Current expiration date: wings. Thanks to many o f the things Month Year

MARCH 1974 41 Super-Javelot F-WCCB thermal hunting over French wine country. « SOARING

• R/C soaring has been . . . pardon the . . . such as schoolyard flying sites. But the exception o f the few honest scale expression . . . “ roaring” along for even with all this going for it, one sub­ sailplane kits available, little else is seen several years now. What started in the element o f the R/C soaring sport is on the field that even approximates full- late 1960’s as a highly limited and quite lagging . . . scale sailplanes. scale lines and contours. It’s a real specialized aspect of aeromodelling has In flight, almost any R/C sailplane shame, too, because there are literally boomed into a widespread, fast matur­ provides a realistic appearance. Maybe hundreds o f full-scale sailplane designs ing, major element o f the sport. In this discourages or at least detracts from representing countries all around the addition to the intrinsic fascination and the initiative and enthusiasm necessary world. Not all are super-sleek look challenge o f soaring, unrelated factors to build anything other than a simple, alikes either. Many have real character, in today's world highlight certain o f its functional design. Or could it be due to interesting and unusual plan forms, and attributes . . . such as silence and safety a lack o f readily available data? With shapes that should stir the blood of any

Javelot cockpit. Tow hook release at left on panel. Spoiler actuator Wassmer WA-22 on final approach displays unusual dihedral config­ handle at far left. Convenience bar in good spot for removing teeth! uration. Ideal for modeling, but seldom seen on full size craft.

42 MODEL BUILDER MARCH 1974 43 earlier, rather unattractive WA-21 “ Jave- lot II" which was a 15-Meter modifica­ tion o f the larger and even uglier Javelot I. A t least one truly outstanding flight is credited to the WA-22. In early 1962, Michel Vergnieres, flying one of the first Super-] avelots o ff the line, soared to an altitude o f 32,500 feet above the home field at Issoire. In France, as well as other European countries, Wassmer Aviation is a well- known manufacturer of sailplanes and light, powered aircraft. The company has a production history encompassing licensed fabrication of the popular Jodel D.112, including a glider-tow version, and a proprietary design, the WA-40 Super IV, which is a four-place, re­ tractable geared sport-tourer. Nonpowered Wassmers, in addition to the Super-Javelot, include theWA-30 "Bijave” which is a two-seat, advanced trainer of some 55-foot span, and looks Super-Javelot F-CCCB displays latest paint scheme above fields near Issoire, France. to be a stretched Super-Javelot. A more contemporary design, the WA-26 scale enthusiast. In earlier days, man­ a lightweight, inexpensive, fabric-cover­ “ Squale" is their fiberglass, “ Queen de carrying gliders were little more than ed, sport soaring machine that is suitable L'Hangar” . .. or something like that... very large models . . . both in con­ for competitive fun in the hands o f a and a real French beauty she is. The struction and proportion. In the ‘30’s weekend pilot and you'd probably get Wassmer o u tfit has also produced such and ‘40’s . . . maybe even into the early the "obvious” answer; the Schweizer varied creations as the Fauvel-designed ‘50’s . . . the name o f the soaring game 1-26. And that answer would be correct AV-36 flying wing sailplane. was duration, not speed as it has been by most measures had there been one Size, weights, and performance of in the last decade or so. But even de­ more qualification . . . "American- the Super-Javelot should be o f interest signs of current manufacture can offer b uilt.” Without that last hooker, the to the R/C soaring enthusiast: excellent model performance potential answer could have been any number of Span . . . 49 ft. 2-1/2 in. (15.0 m) while retaining exact outline relation­ machines from as many countries. Cer­ Length . . . 23 Ft. 2 in. ship . . . if you’re a bit selective. tainly, the subject of this month’s Wing Area . . . 155 sq. ft. The general theme of scale R/C sail­ chalk-talk would fill the bill . . . at least Aspect Ratio . . . 15.7 : 1 planes has been touched upon . . . or a heck o f a lot of Frenchmen might Chord, Root . . . 3 ft. 7-1/4 in. maybe even beaten to death . . . from think so, and THAT many can’t be Chord, Tip . . . 1 ft. 7-1/2 in. time to time. But anyone who has had wrong. Their choice would probably be Section, Root . . . NACA 63821 the opportunity to see a well-executed the Wassmer WA-22 "Super-Javelot,” Section, Tip . . . NACA 63615 scale craft hold its own or even set the merci. Dihedral . . . 4 degrees pace in open competition can hardly The Wassmer WA-22 "Super-|avelot” Weight, Empty . . . 452 lbs. dismiss the subject. Like Konrad Nie- . . . French for Super Javelin . . . is a Weight, Gross . . . 770 lbs. max rich’s heavy, fast, but efficient, "every­ product o f Wassmer Aviation, Issoire, Wing Loading . . . 4.98 lbs./sq. ft. max thing-works-and - they- F LY ” beauties. France. It is a 15-Meter, Standard Class Speed, Min Sink . . . 46.6 mph Like Hans Langer’s potent AS-W15. sailplane or "planeur” . . . which rhymes Min. Sink Rate . . . 2.29 ft. sec. Like Bob Crumley's mind-boggling, with manure, especially when sounded Sink Rate, at 62 mph . . . 3.28 ft. sec. though complex and trouble-plagued with tight nasals, and which means L/D Max . . . 30:1 AS-W12. Like the highly competitive “glider" or if you prefer, “planing A bit o f third-grade slide rule exper­ soaring capability o f Bob Andris' Slings- machine.” The Super-Javelot is a popu­ tise w ill convert the full-scale numbers by T-53. Like Chris Christen’s little lar, high-performance aircraft which first into model values. Just to keep the Briegleb BG-12, featured in the April flew in 1961. options open, dimensions for both 1/6 1973 issue. Like look what john Donel- O f conventional structure for the scale (2 " = Γ-0") and 1/5 scale (2.4” son has done with the HP-14. . . and early ‘60's, the Super-Javelot features = 1 ’-0” ) are given: Hugh Stock with the Kestrel . . . really a steel tube fuselage with fiberglass 1/6 SCALE exciting performance, and very close to panels providing smooth contours from Span 8 ft.-2.4 in. exact scale outline. the wing forward. Fabric wraps the Length 3 ft.-10 in. The possibilities are just too great to framework aft o f the trailing edge. Wing Area 4.3 sq. ft. ignore. Flying surfaces are all-wood construc­ Weight, @ 8 oz/ft 35 oz (2 lbs. 3 oz.l In case the lack o f information or tion with fabric covering. Ailerons are in Weight, @ 10 oz/ft 43 oz (2 lbs. 9 oz. awareness is a contributing cause for the two parts on each wing, hinged parallel Weight, @ 12 o z/ft 52 oz (3 lbs. 4 oz.) dearth o f scratch-built scale sailplanes, to the kinked trailing edge o f the outer 1/5 SCALE something positive might result by occa­ panels. The Super-Javelot . . . as with Span 9 ft.-l 0.1 in. sionally presenting data on full-scale other designs in the Wassmer collection Length 4 ft.-7.2 in. configurations that are especially suit­ . . . incorporates rather distinctive (for Wing Area 6.2 sq. ft. able as model subjects. Maybe the "Si­ full-scale aircraft) dihedral. The inboard Weight, @ 8 oz/ft 50 oz (3 lbs. 2 oz.) lent Rhinebeck" prophesied in MB's sections have no dihedral. The outboard Weight, @ 10 o z/ft 62 oz (3 lbs. 14 oz) July ‘72 column will still come real. sections each carry 4 degrees. Weight, @ 12 oz/ft 72 oz (4 lbs. 8 oz.) Ask most any soaring b u ff to name The WA-22 is a development o f an Continued on page 68

44 MODEL BUILDER Ray Smith, Lawndale, California, took first place in the Southwestern Regionals C/L Scale event with this A-26A. Span is 72 inches, weight is 15 pounds, and power is two Fox -60 Eagle engines.

ontrol line By DALE KIRN

TEACHING SESSIONS their help, the Club could not have serious) stunt flyers to join the Precision Anaheim Stadium was the site for the handled the number o f youngsters that Aerobatic Model Pilots Association second annual “ teach 'em how to fly,” showed up that day. And the fact that (PAMPA). This organization was formed for Christmas. The Anaheim Model A ir­ Cox and Testors were there added at the 1973 Nationals and is picking up plane Club (control line division), Cox, prestige to the activity. momentum every month. A monthly and Testors spent the last Sunday in The number of successful flights that “ Stunt News" is mailed to all members. December for this organized activity. day were quite high. This was due to the Just read the December issue (18 Over 300 potential flyers showed up, fact that there was NO WIND and it was pages!!) and found it quite informative. and at one time there were ten circles about 75 degrees. California can be nice It includes such topics as contest results being used simultaneously! in the w in te r. . . sometimes. . . throughout the country, new products Both Cox and Testors are to be STUNT for stunt flyers, proposed rule changes/ commended on their efforts. Without Now is the time for serious (and semi- comments, e tc .. . —►

Skip Tracy (Phoenix, Ariz.) and Ole Tiger. H°w s this for "Crazy Carrier?" Ted Kraver's Curtiss A-1. Bamboo and balsa construction. Enya ST .15 FR, 7 x 6 prop cut to 6 inch diam. .35 power. Top speed 50. low speed 35! Flies well.

MARCH 1974 45 Youngster at post-Christmas training session, Anaheim Stadium, was Noal Hess, SLC, Utah, and his 2 inch scale Boeing F4B-4 which taught how to use his gift. Look out, Gieseke! placed 4th at the Southwestern Regionals. Fox .60, weight 8 lbs.

If you are interested in finding out The three new circles were beautiful! and several modelers were trying their more about this organization, write to: Two circles completely blacktopped best to establish records. In Senior A Wynn Paul, 1640 May wick Drive, Lex­ with a 90 foot radius. The other circle a speed, Jim Wade turned 144.75 MPH, ington, Kentucky, 40504. "donut” type. And a neat blacktop pit and the team entry o f Newton/Nighten- Results o f stunt at the Southwestern area made in the shape o f a " T ” . Then gale/Beatty clocked 144.17 in Open. Jim Regionals are as follows: 1st, Tom Lay; the rains came, and the parking area had Wade also established a new Senior 2nd, Rogger Barrett; and 3rd, Bob not been finished ... 1/2A Proto record at a "cool” 98.64 Whiteley. There was twelve entries. O f However, the meet was held in spite of MPH. Matt Kelly applied for a Senior special note was the "quietness" o f the the bad weather. A few brave modelers Class C (.40) record at 120.59 MPH. stunt planes flown at this meet. ("super-dedicated” would be a better The real activity in the speed circles SPEED description) actually flew in the rain took place in Phoenix, Arizona on the Who sez it never rains in sunny . . . and the cool (cold to us Californians) week-end o f January 20 and 21st. There California? Twas the day before the first 45 degree weather. were fifty-four speed planes entered!! contest (Jan. 5 and 6) at the new Los This was the first contest of the year And twenty-three of ’em were 1/2A’s! Angeles control line area (Sepulveda for the longer Class A speed lines Lot of new junior flyers coming up. Basin) and final preparations were made. (increased from 52 1/2 feet to 60 feet) And would you believe they came from

Class A (.151 record setters. Team of John Newton, Jim Nightengale, Bob Jones, Santa Ana, Ca., and his 1/2A Proto Profile. LH crankshaft John Beatty (I to r) in Open; Jim Wade (kneeling) in Senior. See text. and single bladed prop. Placed 3rd in Regionals. Bob's 12 years old.

46 MODEL BUILDER Larry Stephens, Phoenix, and his Douglas Roland Baltes, San Pedro, California, placed 3rd in Phoenix with this new Ju 88 D-1 Sky raider. K & B 40, 9 x 8 prop. One inch scale ship is powered by two ST .40 rear rotor engines. Three year project.

Senior Steve Jones and his 4th place 1/2A Proto ship. Used two-line Nice looking Douglas A-1E Sky raider by Marvin Martinez, Phoenix. control system and left-hand single blade prop, turned 76 mph. Uses ST .40 power. as far away as Dallas, Texas and Salt The team entry o f John Shannon/ engine with tuned exhaust. Lake City, Utah . . . gas shortage and Dubb Jett (Dallas, Texas) took first The 1/2A Proto (Profile) event was all? place in 1/2A Speed with one o f their won by Mark Heller (Scottsdale, Ariz­ Competition was fierce in Class A new tuned exhaust .049 engines at ona) at 73.56 MPH. K. C. Kellog took speed. Jim Rhoades (Salt Lake City) 108.92 MPH. They were flying the same second (Phoenix area) and Bob Jones established a record early in the day with plane they won with at the 1973 (Santa Ana, Calif.) took third. his Rossi .15 speed ship at 157.01 MPH Nationals (at 1 11 MPH). Jim Wade took In 1/2A Proto (Sr/Ορ), Jim Wade . . . and backed it up. But, he didn’t get second in I/2 A Speed with his proto almost duplicated his record flight. Was to hold it long. Newton/Nightengale/ plane at an impressive 104.49 MPH. Jim just a bit off, but still turned 96.68 MPH Beatty came back at him with a 159.23 doesn't have a tuned exhaust on his for first place. Jim Rhoades took second MPH flight . . . and backed it up for engine, but evidently has the right prop at 84.16 MPH and Mike Bussell placed the record. In Senior A Speed, Jim Wade worked out to make it go fast. Third third at 83.38 MPH. upped his previous record (144 MPH) to place in 1/2A Speed was 101.54 by Mike Another notable speed was first 153.00 MPH. Bussell (Dallas, Texas) with a DJS .049 Continued on page 60

First in stunt in 24th Regionals was taken by Tom Lay, with this Jim Rhoades, SLC, Utah, had Class A speed record for about 3 hours O.S. 35 powered, 55-1/2 " span ship. Pressurized off muffler. until beaten by Newton, Nightengale Beatty team. He turned 157.

MARCH 1974 47 £θ MODEL BUILDER "HOT G NAT" held by author's son, John Warner. This relatively simple apparatus was clocked at 67 mph . . . decelerating!

* » T ' C M T By BILL WARNER • Having had the distinct pleasure o f by purists, but lies well w ithin the pro­ Weight is a large factor in a speed proxy-flying Jack McCracken’s magnif­ vince of possibility for getting there- meet, the lighter models being the more icent rubber speed job at the 7 3 Nats ‘‘fustest with the mostest.” I believe that successful. The Hot Gnat weighs 4 grams over a 200 foot course ROG, I was rolling along the longitudinal axis sans rubber. McCracken's Nats winner moved to compete in the Flightmasters coupled with my gentle launching toss was a fragile stick-and-tissue ship with a meet later in the summer. After looking may result in a rules change for next light wing loading. down 200 feet, the Flightmasters’ year’s contest. Bill Hannan even made It might be noted that a thrust button requirement of only 88 feet and hand- the comment that he felt the prop was is added rather than using tubing. Epox- launched at that, seemed pretty easy. holding the plane back! NFFS rules at ied over thread windings, the button About a one-hour building period pro­ the NATS precluded hand-launching or does not push back in a crash, and I find duced a rework of my old Poly-Wog more than one 360° roll. Continued on page 64 design with a symmetrical aerofoil and a spine to resist high-speed testing crashes. The project was topped off with throw- tabs, a-la-HLG. I figured that there was no percentage in starting at zero and finishing at 100 for an average o f 50 MPH. The wing was mounted using a saddle o f 1/16 sheet on each side of the fuse­ lage to allow for a rubber-band mount­ ing . . . and sliding back and forth for balance during testing. As soon as the plane was flying an 88 foot course w ith­ out gaining more than a few feet above launch altitude, the wing was glued on solid. A celluloid aileron trim tab was added to help control torque reaction, though the plan was still prone to roll on high Throwing tabs on the wing assist in giving the GNAT a flying start. speed runs. This is known as dirty pool Wish Bill wouldn't design such complicated models!

MARCH 1974 49 Component layout the author is trying on his latest car. Is based on East Coast types seen at the Nationals.

R/C AUTO NEWS Bv Ch u c k h a l l u m One o f the biggest problems with R/C discussing are controversial, but you’ll slightly. Front bite can be decreased by cars is controlling the amount o f power see that they are equivalent to other going to harder tires o f the same com­ that can be delivered to the rear wheels. ways o f doing the same thing. You can’t pound, or narrower tires. A little less If the track conditions are off, such as afford (either money or lime) to have a aerodynamic force may also help. But when the track is dusty or is not used different car for each track, so you have there are numerous ways to decrease the for a while, the cars usually have mucho to make do with adjustments on the one low-speed rear end power delivery. power oversteer . . . you can hardly get you've got. To decrease torque delivery to the on the throttle before you lose the rear Let us suppose you have your car set rear wheels, the clutch can be ad­ end. The other critical time when power up properly for a given track and for justed to slip more at the lower speeds. needs to be adjusted is when your car is some reason the traction is down. What On the top end, the clutch is fully set up for a long, high speed track and can you do? First o f all, the most appar­ engaged and the car speed is not you have to run on a shorter, lower ent problem is that the car oversteers affected. The same relative thing can be speed track. There are numerous ways drastically at low speeds and a little accomplished by increasing the car that you can alter power delivery at the more than normal at high speed. The weight. Other means o f decreasing the rear wheels; we’ll discuss a few of them optimum is to decrease torque delivery delivered low speed torque may change in this month's article. to the rear wheels (without effecting top the top end speed. Going to taller gear­ Quite a few of the things I will be end) and possibly decrease front bite, ing (a lower numercial ratio) w ill almost automatically cause the clutch to slip more and may give more top speed. Low speed acceleration is decreased, but the car really comes on down the straight. If the track is long enough, the higher straightaway speed could compensate for the decreased acceleration. (Although this says you could normally use more horsepower). Other ways o f decreasing torque del- livery to the rear wheels are to decrease carburetor bore size or nitromethane content of the fuel. Both of these approaches decrease the top end cap­ ability o f the car. Changing fuel is very easy, except the needle valve setting changes. Changing carburetor bore size Another way to get the weight to the rear, while protecting the radio gear from dirt and fuel. is relatively easy to do also, and mostly requires a new idle setting. I have a tend-

50 MODEL BUILDER ency to use these more than the weight change. I do change gear ratios from- track to track occasionally. Mostly I change fuel upward, increasing nitro rather than decreasing. Normally, I set my car up for about 7-8% nitro (such as supersonic 100), juggling carburetor size and gearing. If traction improves greatly 1 change to 18-20% nitro and get a tor­ que increase and top end increase. (I always knew I was backwards!) This is like using Eagle 1200 or Supersonic 100 (caster oil lube only) and switching to Supersonic 1000, Eagle 1300 or Missile Mist, etc. There could be two reasons that the slipping clutch improves low speed rear traction when excess torque is available. Obviously, the slipping clutch delivers less power to the rear wheels at a given engine rpm, but the engine speed in­ creases due to slippage and the clutch shoes press harder on the liner due to centrifugal force, and some o f the torque is regained. What power isn’t delivered to Standard layout used during 1973 campaign is still a good system. the rear wheels shows up as heat in the clutch shoes and bell housing. I believe a second reason for traction improvement Well I guess that takes care o f the is that the engine is more decoupled clutch, etc. I think you all know how to from the rear wheels and the engine juggle the nitro content around so I power pulsations are not transmitted to won’t go into that. the rear wheels. When a clutch locks As for the carburetor, I use a Perry. up, it seems extremely d ifficu lt to apply The same things I do in general can be power to a car without having some done for any other carburetion schemes. control problems. With the same power Right now I have three sizes o f throat delivered to the rear wheels, I think the available; 0.156 in., and 0.175 in., and slipping clutch gives better car controll­ 0.200 in. On a 5 lb. car the .200 in. car­ ability than a locked up clutch. Belt buretor throat and Supersonic 1000 fuel drive has a tendency to put compliance is about all I can handle. (The 5 lb. car is between the engine and rear wheels like based on the Oct. '73 article on tires and the slipping clutch, and rear tire traction Standard shoe (Associated, Taurus) on left. Jan. ’74 article on aerodynamics). On Decreasing contact area by cutting away, as is good. shown on right, increases slip. Stiffer springs the shorter courses, Supersonic 100 and How do you make a clutch slip more? will also help. Continued on page 65 Well, as usual, there are two ways. First you can lighten the shoes, and second you can decrease the surface area of contact with the clutch bell liner. It is best to lighten the shoes. Figure 1 shows you how you can do this. It is o f greatest benefit to decrease mass as far from the pivot point as possible. Figure 2 shows where it is best to decrease the contact surface area. Close to the pivot point there is a lot o f mechanical ad­ vantage, so it is best to remove material from there. Decreasing the contact area has a tendency to increase temperatures and wear, so it is best to lighten the shoes if possible.

Lightening the clutch shoes will allow more slip. Shoe can be hollowed out as shown on left, or cut away, as shown on right. To keep weight down as much as possible, hangers are used for radio equipment. Tank is hung on the rear to bring weight as far back as possible.

MARCH 1974 51 6. Bill McCalla FORMULA I 1. Bill Hager 1:38.7 2. Gary Villard 1:38.8 SPRAY SATIN 3. Bob Singer and 4. Bill Gademer 5. Ed Nobora SUPEB ΡΟΧ» OR NOW i K v t n n r 6. Fred Johanson p a in t \ GLOSS “ October 14, was the last race o f the BRUSH* year for this area. We called it the Ohio Pylon Racing Championships. This con­ test was put on for the O.P.R.A. by the Dayton Wingmasters. We had a good turn out and the weather was perfect. At this race, we also awarded trophies to the champs in each class for the year. SUPER The guys worked hard all year to get PAINT & CATALYST points. We had a points system setup (A development of the SPACE AGE) to determine the winners. The champs in each class: The easiest to apply and most durable EPOXY PAINT AVAILABLE Sport Pylon - Bob Gademer Quarter Midget - Ed Nobora •BRUSHING CATALYST - a new addition to our lino. Formula I - Bill Hager The Finish, Satin or Gloss, lasts and lasts and lasts! Grand Champ overall - Bob Gademer "We had a three way tie for first MIX AND USE · NO WAITING TIME · NO HAND RUBBING place in Formula I. Some fly-off! This Fast Curing · Quick Drying was the best race of the day. The con­ test was a shot in the arm for the Least affected by ultra-violet sun rays or by manufactured fuels O.P.R.A. I think next year will be a great year. The results for the races were as 9 BASIC COLORS follows: Red, Blue. Yellow, Orange, White, Black SPORT PYLON Metallic Green, Metallic Blue, and our own K & B Purple 1. Marv Kowalewski 2. Gary Villard All above packed In V i Pt. or Vi PI. can· 3. Dave Brown plus 4. Fred Johanson 21 ADDITIONAL COLORS 5. Don Lowe available by mixing — ask for the K & B Color Chart available at your dealer. 6. Bob Gademer QUARTER MIDGET CATALYSTS 1. Don Love SPRAYING — Satin or Gloss — V i Pt. or Vi Pt. cans. 2. Bob Gademer BRUSHING — Satin or Gloss — V i Pt. or V i Pt. cans. 3. Bill Gademer 4. L. Penrod CLEAR and PRIMER · PRIMER CATALYST 5. Ed Nobora Vi Pt. only 6. B. Johanson THINNER FORMULA I 1. Gary Villard 1:40.2 For use with K & B SUPER POXY — Pints or Quarts 2. Bill Hager 1:38.2 3. Dave Brown 1:49.5 K&B MANUFACTURING 4. Fred Johanson DIVISION OF AURORA PRODUCTS CORP 12152 WOODRUFF AVE DOWNEY CALIFORNIA 90241 5. Bob Singer 6. Zink/Berry Team Thanks a lot for the reports, fellas, P ylon...... Continued from page 15 Hager and Gary Villard for first place. it’s always good to hear what’s going 14. The October 7 race was sponsored Bill ended up in first place because o f a on all over the country, and also in by the Alliance Balsa Bees o f Canton, better time. It was too late for a fly-off. Canada and Mexico. We w ill strive to Ohio, in conjunction with OPRA. The All in all we had a good day o f racing. publish a record of the official times October 14th race was held in Dayton, SPORT PYLON that we w ill recognize as MODEL Ohio, and was billed as the Ohio Pylon 1. Bob Mellen BUILDER’S official record times. At Racing Championships. The race was co­ 2. Marv Kowalewski present, until we have official notice, sponsored by the Dayton Wingmasters. 3. Bob Gademer Kent Nogy holds the Formula I record From the pictures and results, it seems 4. A. Hemenger at 1:20.2. The fastest QM time we have as though they have some awfully good 5. Marshall recorded for the two mile course is meets back there! 6. Ed Tisdial 1:48.8, and 1:29 for the QMRC (short "The Alliance Balsa Bees put on a QUARTER MIDGET course), both by Tom Christopher. The contest October 7, with Gary Villard, 1. Ed Nobora FAI Pylon record belongs to Bob Violett of Canton, Ohio as C.D. We had perfect 2. Fred Johanson at 1:28.8. weather for this one. You never know 3. Bob Penko At present, we do not have times for what it will do this time of year. There 4. Bob Gademer Open Pylon or 1/2A. If you know of was a tie in Formula I between Bill 5. Bill Gademer these times, or suspect that you hold

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R/C R eport. Continued from page 13 The full size plane from which Mel their gross misconduct, don’t ruin it for worked was built by Kilburn Adams of all o f us. St. Louis. Kilbum is also an R/C’er and I wouldn’t be at all surprised to re­ Mel says he gets some fantastic photos ceive some rather irate letters from of models by flying them from a J3 CB’ers concerning my preceding re­ Cub and taking in-flight photos high marks. My only comment to them, above the landscape! Sounds great and before they write is . . . be sure you maybe in a future issue we can show are following the letter of the law in the you some o f those pictures. operation of your station (in other Closing thought for you lovers for RUBBER SCALE PLANS FOR SIX 16) words, that you operate legally) before fine finishes: Hank Waechter of Nash­ FLIGHT-PROVEN, RARE & UNUSUAL you hollar. (Don’t worry, Frank. Any ville, Tenn., tells me that if you will RACING PLANES: CROSBY, FLOYD CB'er reading the mag is probably a BEAN, TWO FOLKERTS, SMIRNOFF strain ALL your dope and epoxy paints BEARCAT, and CHAMBERMAID. modeler, and knows all about the lousy before you spray (or brush) them, you Complete set, postpaid, only $4.00 situation, wen) will get superior results. I ’m told that order from: Good friend Mel Hart of 936 Don- the junk you stop from going into your CLOUDBUSTER VENTURE taos, S t Louis, Mo. 63131, is an old sprayer is amazing. Hank says to use a P.O. Box 2921, Livonia, Mich. 48154 ham operator and also a rather accom­ piece o f covering silk, or an even better plished R/C’er. In addition to doing filter is a piece o f the old lady’s stock­ one o f these records, please advise us! repairs on most makes o f R/C gear ing. (Make sure she isn't planning to We have heard rumors that Terry (Mel’s also an electrical engineer), he wear It again!) · Prather has lowered the Formula I builds a heckuva plane. Photos show record to 1:17! Wow! We cannot recog­ his museum quality Volksplane. It is F/F Scale . . . Continued from page 33 nize this as official until we have the exact scale, one-quarter size, which Put in about half or two-thirds o f the results! We would like to keep these makes a six foot span. Weighs in at total winds while the rubber is stretched, times up to date. If you break one o f 10-1/2 pounds and a Ross twin powers and the rest as you move in to the fixed these records please let us know as soon it. Even the hinges and control horns end. Stop when the distance from hook as possible! are hand made to duplicate the original. to hook is the same as it w ill be inside Our new NMPRA president, Glenn Super Coverite was used, with Sig dopes. the model. Spickler, was seen at the QMRC season Mel photographed all the instruments “How many turns to use? If the opener at Sepulveda Basin, Van Nuys, in the original plane and reduced them motor is new, put in about two thirds California. The January race was a huge to scale size. He turned the cockpit o f the maximum possible for the first success. Glenn was impressed with the details, like knobs and such, on his time. Increase the number about ten race and the way it was conducted. lathe. The throttle controls the radio percent each winding. Most rubber will Report in next issue! · on/off switch. loosen up or “ break in ” with four or

54 MODEL BUILDER S THEM! KIT FS-14 WING SPAN 64" LENGTH 55" · FOR ENGINES FROM .35 TO .60 $54.95

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five windings. Some of the older rubber because the same loop of rubber may may take more. A broken in motor will take fewer turns or more turns on HEY GLIDER MAN ! deliver more total energy than a new different days! Extreme temperatures, Want a higher launch? motor, thus producing longer flights . . . both high and low, usually reduce the How obout 1000(t I providing that it is the correct size, of turns possible in a motor. course. "Sometimes, motors that have been Got a small field ? Big enough to land — “The total number of turns that used several times with good results Big enough to launch I a motor will take depends upon many will suddenly become brittle and break things, including the loop length, the at low turns. Usually such motors will Tired of chasing the launch line ? rubber width and thickness, the quality harden up rather quickly while winding. Drop o PARA-POD ot your fe e t I of the rubber, and how many times it Thus, if you wind slowly and feel the with 22 porachute J 6 9-? has been wound. From time to time, rubber you can often avoid breaking it. 22“ ch u t· charts are published giving the turns The sixteen-to-one winders transmit a J3«5 Sil YOUR DIAIIR FIRST I per inch as a function of rubber width. strong torque back to your hand and so Usually, I cannot get as many as the help you sense the condition o f the P»·-«»* A IW ,. CM4— 1« n l« * w tt WMCO» charts show. Such charts are a good motor. Obviously, the number of turns b tW i- O ·· general reference, but you must feel that a motor will take is proportional Value Engineered Products to its length. So from the test loop you out each loop. Practice with a short 5651 Kelvin Ave . Woodland Hills. Calif. 91364 loop and increase the turns slightly can tell closely how many to expect. each winding until it breaks. "Test the model with a short loop as wound, mark its envelope with the “ Wind the rubber slowly, stopping described and change strand width if turns used. occasionally and feeling the hardness. necessary. For longer flights, longer “ Some modelers wind the whole That will give you an idea as to how loops can be used. I f the length is in­ prop and nose assembly, as well as the many turns it will take and when it is creased two or three times the original rubber, by means o f a front hook in the near breakage. As the rubber gets hard, length, a slightly wider size may be prop shaft. It is safer to use a winding you better wind slowly and move in needed to make up power for the tube in the fuselage, which necessitates fast! The winding in that case is merely additional weight. removing the assembly from the rubber. to use up the slack as you shorten the "A fte r a few windings, stretch the For small motors, up to 1/8 inch in length. If you come in any appreciable motor and inspect it for nicks or a width, plastic tubes, one-half inch in distance without adding turns, the rub­ loosening o f the knot. Rubber that is diameter, work well. A wall thickness ber will often form large knots which wound to capacity will often begin to o f 0.010 inch will hold the broken can jam up in the fuselage or even tear after three or four such winds. If strands. The tube should reach from the climb the rubber o ff the hook! And wound to just eighty percent o f capa­ rear peg to an inch or so beyond the that can spoil your whole day! city, the motors can usually survive sev­ nose. “ Developing this feel is important eral times as many. Each time a motor is “ Form a hook on each end of a

MARCH 1974 55 old Towner. Some o f the new plans Bob ISN'T IT ABOUT TIME YOU STOPPED BEING A HACKER? has for rubber include the Bristol Beau­ THE UBER SKIVER WAS DESIGNED TO MEET THE PRECISION RE­ fort and H.P. Hampden bombers. Yes, they are bombers! Considered for either QUIREMENTS OF PHOTOFABRICATION, MICROCIRCUITRY, GRAPHIC F/F or U/C are the Hawker Typhoon, ARTS PRODUCTION, ETC., AND AS SUCH BECOMES THE PERFECT P-47D, and Fairey Barracuda. Send CUTTING TOOL FOR THE DISCRIMINATING MODELER Bob a self-addressed envelope for his tu ftm. latest list of plans. April 28 is the date for the Flight- master’s 2nd Annual Indoor Scale Con­ test, to be held in the Blimp Hangar, Santa Ana, California. The time is from 0900 until 1230! AM A membership will be required for flying. ·

Osprey__ _ Continued from page 11 11 To turn, use rudder and ailerons. Even with those huge ailerons you will need the rudder, especially when the nose is pitched up. You w ill need less than half power for normal flying; trim 10 15 20 for level flying. • Rear Draw-Bar Clutch uber Skiver Precision Cutting Tool When landing, use the power to • Instrument-Quality Materials Available in seven anodized handle colors: control altitude; the nose will pitch up • Advance Collet Design silver, blue, red, green, gold, copper, violet. when power is cut and w ill slow down. • Hex Cross-Section Complete set in fitted hardwood case; includes Stay o ff the elevator as much as possible • Deeply Knurled Grip uber Skiver, together with two vials containing • Long-Life Stainless Steel Blades during landings. If landed too fast, she 6 No. 11, 6 No. 15, one No. 12, and one will bounce. If this happens, add some No. 20. . .A total of 14 blades $10.50 See your dealer, or order direct. power and up elevator. Dealer inquiries are invited. Individual handles (specify color) $3.95 Pkg. of 6 blades (No. 10. 11, 12, 15, Stalls are gentle and surprising. The All direct orders sent postpaid or 20) . $1.80 first indication of an approaching stall ...... is the feeling that your radio has stopped working. When in a stalled condition, MODEL BUILDER PRODUCTS the ailerons and rudder w ill become 1900 E. Edinger Ave., Santa Ana, California 92705 completely useless. In this condition, she w ill just sit there and that’s it. If you decide to pull in more up elevator, piece o f piano wire, 0.033 inch dia­ its latest Peanut kit, that o f the clipped she will drop a wing and spin. When the meter, about an inch longer than the wing Piper J3 Cub. The kit features stall occurs, add down elevator and full plastic tube. Remove the nose assembly top grade wood, proof-of-scale 3-views, power until speed has been gained. from the rubber, hook one end o f the step-by-step construction photos, spec­ SCALE INFORMATION piano wire onto the rubber, and slide ially designed nylon thrust bearing, Scale information is available from the plastic tube over the wire and the rubber motor, plastic propeller and George Pereira, Osprey Aircraft, 3741 rubber into the fuselage. An assistant wheels (Photo in last m onth’s "Over El Ricon Way, Sacramento, California, holds the model by the rear peg and the the Counter."). I personally feel that 95825. The cost is $3.00. front of the tube. this is the best kit Bob Peck has de­ I would like to express my thanks signed, and if built just like the direc­ "Hook the winder onto the other end to Mr. Pereira for his time and help in tions and plans, it w ill be a certain of the wire and wind the motor as building my OSPREY I. winner. planned. Stop the motor about an inch For additional information regarding from the front o f the model. Slide This is the first k it to incorporate the model Osprey I, or built up fiber­ the plastic tube out over the wire and a complete set of two-color mylar press- glass cowls, write to: David A. Ramsey, grasp the rubber about a half inch from on decals. A t first glance they appear Box 78, Chester, New Jersey 07930. · the end, very securely! Allow the short to be like a regular decal sheet, but end o f the rubber to unwind, remove instead o f having to dip them in water, Little Gem . . .Continued from page 16 the wire and hook on the prop. This you merely cut them out, peel from . . . not once, but three times, in the may seem awkward at first, but with the backing, and press them on. The hands o f one o f the foremost pylon practice, it goes easily and affords great model is simple to build and I w ill have racing devotees in the country. protection for the model in case of a flight report as soon as I have mine Austin Leftwich has used the con­ broken motors! Broken pieces jammed finished. In the kit is a flyer showing verted DOUBLER "L ittle Gem” since in the tube can be fished out with a the many plans, kits, and accessories winning his first World Championship wire hook. The hole in the nose o f the handled by Peck-Polymers, which are for Quarter Midget Racers at Mentor, model must be large enough to admit numerous to say the least. The price o f Ohio in 1969. Since that time, he has the tube, obviously, so build models the new kit is $2.95. won two more World Champs, and a that way. Bob Holman, P.O. Box 741, San host of other trophies, using the same "I have had one or two motors Bernardino, California 92402 is contin­ model refined to the degree shown on break after the tube was removed from ually adding to his already long list of this conversion drawing. the fuselage. I suspect those motors scale plans for F/F and R/C. As many We would like to quote a few things had a nick that slowly grew into a of you know, Bob handles all o f the from Austin’s most recent letter: break so inspect motors carefully before Aeromodeller scale plans, and he has “ Because o f my successes with the winding!” added several more from another source design, and also because it is so easy to Peck-Polymers, P.O. Box 2498, La in England. These are plans drawn by build (and fly), there are 8 other active Mesa, California 92041 has just released well known English scale modeler, Har­ competitors here in Atlanta who com-

56 MODEL BUILDER I’M CONTROLLED BY KRAFT’S NEW SPORT SERIES 2-3 CHANNEL RECEIVER-SERVO The receiver and 2 servos are integrated into a single case. A pigtail lead extends from the case and connects to a third servo. The third servo is actuated by a lever on the transmitter and can be used to actuate the throttle on simple aircraft, flaps or spoilers on gliders, and rudder or mixture control on boats.

KP-2-3B (System with dual stick transmitter) Third servo not included in price $139.95 KP-2-3S (System with single stick transmitter) Third servo not included in price $149.95 KPT-2-3B (Dual stick transmitter only) . . . $ 54.95 KPT-2-3S (Single stick transmitter only) . $ 64.95 KPR-2-3 (Receiver-Servo o n ly )...... $ 89.95 WRITE FOR FREE CATALOG ------4 50 W. CALIFORNIA AVENUE R A J F T VISTA, CALIFORNIA 92083 - svsrtMS INC K WORLD’S LARGEST MANUFACTURER OF PROPORTIONAL R/C EQUIPMENT

pete with them. Five o f them are novices trimmed free flight... The radio merely are furnished. Full size rolled plans, who wanted very much to compete in controls where the model goes, not printed building instructions, and a copy the event, but were unsuccessful in try­ how it gets there. Modelers who are o f the 1939 Model Airplane News con­ ing to master the race course with some building and flying O.T. R/C airplanes, struction article are also included. o f the strictly Quarter Midget design whether to recall the “ good old days” The model is kitted for building a kits on the market. Every one o f them or to find out "what they are like,” free flight version, and as such, is ade­ has managed to compete successfully are discovering that this is the truly quate. However, we intended it for with his version of the Little Gem. relaxing hobby they have been looking R/C, and therefore made some m odifi­ “ The enclosed sketch (incorporated for. cations. Since the mods would apply in the drawing) has been distributed Our building time is at a premium to most any OT-to-R/C conversion, we widely throughout the Southeast and these days and yet we’ve been wanting will hopefully clarify them as we go there have been 30 to 40 Little Gem’s to build an O.T. R/C in order to join along. produced from it. There were 17 Quarter the fun at various contests scheduled O.T.’s can be radio controlled with Midget events in 1973 within 350 miles for the coming season. It was therefore one to three channels. For one channel, of Atlanta. I managed to compete in 8 a happy day when we received a sample operate the rudder, with the engine cut o f these meets, Gail Jacobsen (Assoc. of Chuck Gill Models’ kit for Sal Taibi's by timer. For two channels, there are VP SCE for Quarter Midgets) was flying famous Powerhouse. two choices; rudder and throttle, or a Little Gem and was either 2nd, 3rd or The kit may seem expensive at rudder and elevator with the engine cut 4th." $44.95, but a mere look at the mon­ by a timer . . . we’d choose the latter. My sincere thanks to Austin for his strous logs o f balsa included should Three channel is the optimum; giving assistance in helping me prepare this dispel any feeling o f being “ taken." In full control o f the engine, in addition to conversion drawing. The record o f wins addition to the 5/16 sq. material for the rudder and elevator. If you want ailer­ speaks for itself . . . an inexpensive kit, a fuselage, you will find 1/4 sq. and 1/4 x ons, forget Old Timers and go fly R/C little imagination and who knows, you 1/2 wing spar stock, 5/16 sq. leading airplanes! Ailerons aren’t necessary, nor might even make the ‘Champ’ hustle a edge material, 1/8 x 1-1/2 trailing edges, are they proper for O.T.’s! little harder. From the correspondence and liberal amounts o f 1/8 x 3/8 for the There are two valid reasons for beef­ we’ve had over the past 4 years, he would many stab ribs. ing up the structure in O.T.’s . . . one like nothing better. He’s a real great The wing, stab, and rudder outlines, applies whether you build it for R/C ’sportsman’ and competitor who wants as well as the wing ribs (huge!) and or F/F, while the other applies to R/C all modelers to get the same enjoyment fuselage bulkheads are found on die-cut in particular. he receives from the hobby. I tip my hat sheets of 3/32 and 1/8 balsa. Also in­ The first reason concerns the use o f to him. · cluded in the kit are hardwood landing plastic covering films, such as Monokote R/C O .T .. . . Continued from page 23 gear mounts and motor mounts, balsa or Solarfilm. By their very nature, they R/C is a model that w ill fly entirely nose block, and pre-cut ply dihedral do not provide enough o f the “ skin without help . . . as does a properly braces. Pre-bent 5/32 landing gear wires strength" so necessary for the light-

MARCH 1974 57 at all, it would probably be in the stabilizer spar and trailing edge. There will be occasional extra air loads, and the trailing edge must be slotted to re­ ceive the hinges . . . which could weaken it slightly. í á The 1/4 sq. balsa wing spar stock which came with the kit would have Makers made an indoor flie r’s spine tingle with excitement! It made us go to the wood pile and dig out some 1/4 sq. spruce! of While in the wood pile, we also picked up a piece o f 3/32 sheet contest balsa for webbing. If you have any doubts about the value o f webbing between the top and bottom spars, talk to any­ one who has built and flown a few R/C gliders. When joining the two panels to the the SANTA BARBARA ONE DESIGN center section, we dropped the dihedral about 2 inches in each . . . from 8 to 6 inches. This is not enough to change the character o f the design, but will help smooth out the ship’s reaction to rudder and SOLING-M r/c racing yachts. operation. While working on the center section, notch out the trailing edge and epoxy about a 6 inch length of coat hanger wire reinforcing. This will pre­ 210 EAST ORTEGA STREET vent crushing by the wing hold-down rubber bands. Before covering that wing, stab, and SANTA BARBARA, CALIFORNIA 93101 rudder, especially if using plastic film; be sure to punch holes in all ribs so that (805) 963-1636 trapped air will not p u ff up the covering when it is heated . . . during application and shrinking, or later, when the model sits out in the hot sun. An "exhaust” hole, punched in the bottom center stope&thermal soaring sailplane section sheeting, provides the outside breather for this expansion and contrac­ tion . . . There’s a huge volume of air (DOÉIMíE inside that 7 foot span, 14 inch chord The "Hi-Performance Compact" wing! The heart o f the model . . . the nerve FEATURES center o f the radio installation . . . the contour-sanded wing ribs SPECIFICATIONS container for its flight power. . . is all ng span 72 me has machined balsa & plywood parts housed in the fuselage, and it is here length 39 inches where the most modifications must w e ig h t 24 ounces plug-in wing panels & stabilizer occur in order to convert your O.T. spruce spars for radio control. To avoid marring the outside ap­ all flying stabilizer pearance, the first step after completing 8 hour building time the basic structure, was to line the in­ side o f the lower cabin area with 3/32 M iS LIMITED it n o t af your dealer.order direct balsa. In addition to providing extra price $27.50 Celil Res edd 5$ Ta« dealer inquiries me bon 39745L A Calif 90039 strength, this also gives the radio-pro­ tecting foam rubber something to lean weight open structures usually asso­ the new, and oft-times unusual "aero­ against! A personal preference, though ciated with O.T. models . . . and most batic” maneuvers to which the craft not necessary, was the substitution o f modem competition free flights, for may be subjected! With these thoughts grooved hardwood torsion bar landing that matter. Once covered with tissue, in mind, let’s modify the Powerhouse gear blocks for the stock items. Set silkspan, or silk . . . water shrunk and for radio control (Sorry 'bout that, flush with the fuselage bottom, this doped . .. these otherwise flimsy frame­ Sal, you can’t fight modern times!) meant slotting the bottom longerons, so works become quite rugged. If you’re To outward appearances, the tail sur­ we added 1/8 inch gussets at these going to cover with plastic film, “ add faces are the first obvious sign of the points. more bones to the skeleton!" addition to R/C . . . The stab becomes Servo rails o f 1/4 x 1/2 maple were Radio control w ill probably develop stab and elevator, and the rudder be­ epoxied to the bottom side o f the lower several new stresses in free flight struc­ comes fin and rudder. A rule o f thumb "window sill” longerons o f the fuselage, tures, in addition to increasing those would be to split the vertical area 2 to and were locked in by the inside sheet­ which are normally expected. 1 . . . two fin and one rudder, and ing. The rails were spaced to accommo­ Because o f the lightness o f modern split the horizontal area about 5 or 6 date O rbit PS-3 servo trays, which radio systems, extra wing loading on to 1 . . . one part elevator and the rest worked fine to mount the Kraft-made the O.T.’s is not so much a factor as are stabilizer. If any beefing up is required Heathkit servos of our GDA-405 sys­

58 MODEL BUILDER KIT CL-20 ENGINE: .29 -.40 WING SPAN: 53U' ♦4.85

WINGSPAN: 34” WING AREA: 250 in. ENGINES: .15 to .25 C-L AKKOA\ASTBK SUPER CHIPMUNK Designed by Mike Grets * New Look Molded Plastic Cowling Designed by Mike Stott Patterned after the full-scale aerobatic design, this * Sleek Bubble Canopy With Molded Framing compact little beauty is rough, tough and sturdy. An ideal trainer for control-line stunt flying, it will do the Smooth Formed Plastic Wheel Panta entire AMA Precision Aerobatic pattern. Fast build­ Handy Printed Sides - Build Directly On The Wood KIT CL-19 ing, all-balsa construction provides light wing loading, * Heavy Duty Bellcrank stable flight and high performance. ♦18.95 * Colorful Decal Sheet Shaped Fuselage Formed Toraion Bar Landing Gear Shaped Leading and Trailing Edges * Complete Hardware Pack Including Molded Nylon Hinges All Remaining Parts are Die-Cut Balsa or Plywood ' Die Cut SIC B el·« And Plywood Shock-Absorbing Landing Gear * Dot·tied Full-Size Plene THE LATEST VERSION OF THE FAMOUS AEROBATIC AIRPLANE FOLLOWS THE LINES Formed Canopy AHO COLOR SCHEME OF THE MODIFIED FULL-SIZE CHIPMUNK FLOWN ST SKIP VOLK. Ready-Bent Landing Gear and Pushrod THE UNIQUE LINES OF THE COWL AND CANOPY SETS THE MODEL APART FROM THE Hardware Pack Includes Nylon Bellcrank, Elevator Hom and Hinge Material AVERAGESTUHTER OESICHER MIKE STOTT HAS INCORPORATED EAST CONSTRUC- Complete Building and Flying Instructions, Illustrated TIOM «ΙΤΗ STRENGTH AND DURABILITY TO PRODUCE A HIGH PERFORMANCE BEAUTY With isometric Drawings. g r ø J | AXIII ACTIPItIX G CO. , INC 401 S. FRONT STREET MONTEZUMA, IOWA 50171

tem. Who says the stuff isn’t getting 45 shown. We’re going to try a K&B standardized?! 35 Stallion, a Veco 19, a 60 of some ( PEANUT SCALE ACCESSORIES One each Nyrod and Golden Rod description, and get th is . . . next month DRUINE TURBULENT NEWI NEWI (How’s that for remaining impartial?) we'll tell you about our experiments KIT $2.95 CUPPED WING PIPER J3 CUB carry the servo motion back to the tail with an Astro 25 electric motor installa­ surfaces. The rudder push rod originally tion. How about that folks, an Electric 12 IN S P A N came out ahead of the stab, on top, Powerhouse! P-NUT but our Soaring Editor, Le Gray, on a When sanding out the fuselage prior weekend visit, so severely criticized us to covering, we noted a certain amount that we reworked it inside to a rudder of lateral flexing. Thinking ahead about tiller. A pain in the butt to hook up the Monokote that was going to be used, during assembly, but it sure looks a lot we grabbed some medium soft 1/4 KIT $2 95 MILES M l6 KIT $2.95 PIETENPOL AIR CAMPER better (Boy, will that ever make him square and added diagonal bracing top RUBBER POWERED FLYING MODELS! smug!). and bottom. The weight penalty was If N O T AVAILABLE AT YOU» DfAlf*. ORDER DIRECT ADD 35« FOR POSTAGE X NANDI INC CALIFORNIA *£S/DfNTS ADD 6 % TAX Depending on ultimate useage, you negligible, but the strength increase was SEND 25« FOR CATALOG - HARD TO FIND ACCESSORIES. KITS AND FLANS FOR SMAil RUBUR MODUS may or may not want to install a large tremendous. Set flush with the inside P. O BOX 2498 * Μ β fuel tank. Normal O.T. competition re­ surface o f the 5/16 longerons, they Ptck’ Pefymirs LA MESA. CAUF. 9 7 0 4 1 quirements are for 20 and 30 second don’t show on the covering surface, but engine runs, and in Texaco, a 1/4 look terrific when the light shines ounce o f fuel per pound. Since we also through. Incidentally, the ship is covered expect to fun-fly our Powerhouse, we in metallic blue and opaque yellow installed an 8 ounce round Sullivan Mono kote. bottle. (Hmmm. Wonder what it would The windshield and side window be like to slope soar that crate?) A installation may be of interest. They are 3/32 ply tank saddle was epoxied across all held on with DJ Multi Stripe! By the fuselage, and the front wing rubber next month, when we report on the dowel had to be changed to two short electric power experiments, we'll let you pegs. Epoxied through holes in the big, know how the window installation holds permanent motor mounts, we don’t up. Sure makes a simple job o f it, and expect them to come loose. it ’s decorative too! Speaking o f motor mounts, the nice Something else will have to wait until thing about the Powerhouse is the re­ next month too. In a way, when you movable sub-mounts. These permit flex­ consider all the Powerhouses that have ibility in engine installations . . . handy been built and flown over the years, it’ll for us as we intend to experiment with seem like an anti-climax to report on TATONE PRODUCTS larger and smaller engines than the Enya how our model flies . . . but we’ll do it ISO · O IN IVA A V . «AN FBANCIBCO, CA. »»II·

MARCH 1974 59 1974 COX TEE DEE .049 AND anyhow. The ship was just completed .051 ENGINES IN STOCK!! in time for this article, and in all probab­ ility, the first test flights w ill take place during the San Valeers Winter Nats, to be held February 16 and 17 at Taft, California, where we’ll enter it in the R/C Texaco event, modified to an 1/8 ounce o f fuel per pound o f airplane. Oh well . . . Isn’t that about par for the course? · C/L ...... Continued from page 47 place in Class B Speed (J r/Sr/Op) at KK-01L $17.00 191.01 MPH by Shannon/jett. Mike Tee Dee Bussell took second at 171.85 MPH. Tee Dee .049, with left-hand crankshaft (polished) and KIRN-KRAFT Front Needle Valve Assembly. First place in Class C speed was won by KK-01R $17.00 Norm Drazy at 175.20 MPH. Tee Dee .049, with regular crankshaft (polished) The weather at this meet was the best and KIRN-KRAFT Front Needle Valve Assembly. we’ve seen in years. It was in the mid- KK-01F $17.00 Tee Doe .051, with regular crankshaft (polished) 70’s both days, with low hum idity- and KIRN-KRAFT Front Needle Valve Assembly. (20-30%). No wind to speak o f on Sat­ er Plug Sparks Column. So, at 5:30 KK-02 $20.00 urday. A little wind Sunday morning, a.m., he sat down and wrote a letter Tee Dee .049, with left-hand crankshaft (polished), but it calmed down about noon. pressurized backplate. opened up venturi and KIRN- from which are quoted parts pertinent KRAFT Front Needle Valve Assembly. If attendance at this meet is any to the proposed SAM change the writer KK-03 $20.00 indication for this year, it sure looks advanced in an attempt to head o ff the Tee Dee .049, with regular crankshaft (polished), good. Perhaps the “ gas shortage” is not pressurized backplate. opened up venturi and KIRN- scramble: KRAFT Front Needle Valve Assembly. as serious as we th ou gh t. . . “ We fly in average winds o f 12 to KK-04 $20.00 SCALE 24 mph, with heavily wooded areas Tee Dee .051 (same features as KK-03) Interest in scale at the 24th South­ surrounding the field. One flying sight ALSO IN STOCK: INDIVIDUAL REPLACEMENT western Regionals was quite good this PARTS FOR TEE DEE .049 and .051 ENGINES. is only 75 yards from the Atlantic year. Four multi-engines planes and Ocean, bounded by the Connecticut UPGRADE YOUR OLD TEE DEE'S WITH three single engine entries. Ray Smith River. A1974 CRANKSHAFT AND CRANKCASE. (Lawndale, Calif.) took first with his NOTE: The 1974 Tee Dee engines have a stronger “ Your ideas about flying hands-off crankshaft and a ground finish on the crankpin. The neat A-26A. It really flies nice. He won radio under power are great, but there new type shaft WILL NOT fit into the old type with the same plane last summer at a will be a lot of crashed ships, poor crankcase ("No. 2" stamped on mounting lug). San Diego contest (see Sept. 73 issue R.O.G. characteristics, very little preci­ of M.B.). Marvin Martinez (Phoenix, sion flying, and darn few spot landings. Ariz.) was second with his BF-110D-3 “ We felt the same way about hands- bomber, and Roland Baltes (San Pedro, Calif.) was third with a brand new (three o ff radio and thought this was the way year project) JU-88D-1 bomber. · to go. A meet at Lakehurst using rules similar to those you propose was held Plug Sparks . . Continued from page 21 last June 24. In good spirits, we all entered with the intentions o f winning Description Price 2. The model must be scaled down Part No. with good ships and excellent pilots. TD-01 CRANKCASE $3.00 from the original, maintaining similar TD-05 CRANKSHAFT, regular rotation $3.00 structural type, airfoils, moment At the end o f the meet, a contestant TD-06 CRANKSHAFT, left hand $3.00 arms, dihedral, etc. meeting was held and it was unanimous­ FRONT NEEDLE VALVE ASSEMBLY 3. Model must be rubber powered. ly agreed never to have a “ hands-off” For Tee Dee .049 or .051 4. Model wingspan limited to 24 event again. “ I didn’t see many ships go home FEATURES. inches projected. in one piece, that day. I picked up the 1. 128 threads per inch for finer 5. Model must be tissued covered. adjustments. Condenser paper or similar covering winner’s plane with my four-wheel 2. Nylon seal over threads and not permitted. Jeep. His score was not high . . . He was needle valve body which keeps lucky! air from sucking down the 6. No folding props. thread area. Prevents "false” 7. Models must R.O.G. Landing gear "Radios and engines are expensive, needle settings. may be extended for larger rubber not to mention the cost o f balsa. On This custom needle valve assembly will help you the average, with fuel-control meets, we get more consistent engine runs - flight after flight. type propeller. 8. Model w ill be judged for fidelity still lose seven to nine ships out o f PISTON/ROD RESET TOOL every thirty contestants. To change For Tee Dee .049 or 051 to original scale. 9. All material sizes cannot be less back to "hands-off” would only increase BENEFITS: than to scale. Larger sizes permitted. the loss. You do not increase activity 1. Assures peak engine perform­ in the sport with more crashed planes. ance. 10. Six attempts to make one o ffi­ Extends engine life. cial flight. “ John, please try it before thinking Eliminates the possibility of 11. Official flight is 5 seconds or of a rule change. If it is run as an addi­ breaking crankshaft when en­ more. tional event, hold it last! I sure could gine is run at high RPM Hopefully, a good turnout will re­ tell the Old Timer R/C F/F boys what sult. We’ll try to keep track of this new not to do!" Tool made from hardened steel old timer phase. Well, Al, thanks for reading the Send check or money order. No C.O.D. available. ALL SHOOK-UP DEPT. column (hey, look WCN, somebody Mail order only. just received a letter from Al does read the stuff!) and for your KIRN-KRAFT Schwankert o f the New Jersey Old Time comments. You’re absolutely correct in SEND 10 t FOR LIST OF P.O. BOX 224 Eagles. He sez he couldn’t sleep all night your last paragraph. For this reason OTHER 1/ZA ITEMS ANAHEIM, CALIF. 92805 after reading the December Model Build­ the writer has backed o ff (see previous

60 MODEL BUILDER 724 Challenger IT

BOAT & HELICOPTER STARTER with Aluminum Dual Drive Pulley, offers choice of starting speeds.

See it at youft^DeaCm oMowl o/t QA^ite ciiftect jo/ι Catalog Siteet.

bO N IC -lR D N lcsE INC. 2 South SYLVANIA AVE. PH I LA.,PENNA. 19 I I I issue) and decided to try it himself. (MECA 659) has started an engine con­ Until that time, we won’t propose any version business known as Marks Model FLYLINE MODELS rule changes. Having two or three Engines, 112 Clinton Ave., Salt Lake CLASSICS IN 3/4** SCALE models on the work bench with various City, Utah 84103. Its here ! sizes o f horsepower, it won’t take long Mark will do engine conversion on The historic to run an evaluation. any size and make o f engine. Right now B e l l a n c a OTHER SIDE OF COIN he is specializing in Torpedo engines “S k y r o c k e t "

Just about the time the writer fig­ because o f easy adaptation. Deal works U . V2 ■ WINGSPAN. .020 POWEP FOR PULSE A NO SMALL MULTI tis tl ured all easterners liked the hot free this way: You send your engine and RADIO CONTROL UMTS CAN BE FLOWN FREE FLIOMT ON ALL BITS INCLUDE TOP OUALITr PRINTED flight with even hotter engines, Ed timer you want installed. If you don’t RUBBER POWER BALSA, SCALE WHEELS, OCCALS ANO SUPER DETAIL ROLLED PLANS BY HERB CLUHCT Goretzka, of Timonium, Maryland, have a timer, he will supply one for writes to say that the local F/F and R/C $4.00. The conversion consists o f com­ i\0f· Afo+ioctuipe boys are in agreement that the over­ plete refinishing, the case gets a matte finish (like Super Tigre), the head is 22 U2 - WINGSPAN FOR powered R/C jobs somehow don’t seem RUBBER. C02.0R 010 POWER A BIT to be consistent with the normal relaxed Klondyke gold, all black parts reblack­ OF NOSTALGIA ANO A DCLIOHT TO BLM.Q air o f old timer flying. ened. Tanks are plastic or metal, yer PLY LINE MODELS 10643 ASHBY PL Ed, along with others in his area and cherce. •SEE YOUR LOCAL HOBBY DEALER· FAIRFAX.VA New Jersey, have this feeling, but have Conversion price is $20.00 plus post­ Standard Distributor Discounts been talked down, by the more vocifer­ age. A ll work is guaranteed and engines ous. Ed sez, "I won’t shout, I’ll just do test run. Depending on size engine, dents. His class has received the benefits my thing and have fun.” Hey! How Bantam, O&R, Torpedo, or Cyke timers o f guest speakers, such as Frank Zaic, about that? It would be interesting are used for the “ Klondyke Specials." field trips and contests, with the ob­ jective of receiving education in all to poll the contestants for how they LAST WORD all feel. However, if you have an opin­ That guy, Bob Von Koňsky, can phases o f aviation. All has not been ion, ya gotta speak up! think up more work for the writer than smooth sailing, however, and problems Ed concludes by saying this O.T. he can successfully avoid. Latest idea is common to us all have been encount­ movement is gradually converting those to run an illustration or three view out­ ered. For example, the football players red hot competitors who are too busy line drawing o f old ignition engines so and school band members just couldn’t to smile and relax. We’ll gettum all yet! the fellows can get a feel for the old en­ quite see why they should have to share “ their” athletic field with “ toy airplane STAND CORRECTED! gine they are currently considering. flyers.” Cotter’s creative solution? The It is refreshing to the writer that Would also help for mounting, cowling, Great Indoor Rubber Powered Stick somebody actually reads this column etc. How about it friendly reader? I Model Flying Contest!, which was con­ and takes the time to straighten out the ain’t gonna do nuttin’ until I hear from ducted in the school auditorium. The writer. Latest example is a letter from you! Besides, it’s time for pizza and response from the students has been Jerry Persh o f Annandale, Va., who beer. See ya next issue! · most enthusiastic, and Cotter reports points out that the article on the Mini- that model aircraft are the best "teach­ Intercepter forgot that Persh, in 1969 Hannan . . . Continued from page 34 ing tools” he has ever known, and at Willow Grove Old Timer Nats events, NOTES FROM THE CLASSROOM points out that models formed his own registered four maxes in a row! Jerry We have quite a number o f school introduction to a life-long interest in states the Goldberg Intercepter is a fine teachers in our ranks, some o f whom aviation. design, capable o f meeting today’s com­ have managed to stir their favorite petition when properly adjusted and hobby into their curriculum. L.B. Cot­ THE INTERIOR BIT using a good engine. He’s telling us! ter, of Granada Hills, California, is With the ever-increasing accent on ENGINES more fortunate than most, in that he is fidelity-to-scale, it might be well to re­ With old ignition engines getting an instructor of Aviation Literature, examine every possible way o f produc­ harder to find all the time, it is a real and thus needs no excuse to introduce ing more realistic models. One o f the pleasure to report that Mark Fechner model building and flying to his stu­ more neglected areas is the pilo t’s com-

MARCH 1974 61 however, some rationalizers have risen REPLICA OLD TIMERS to defend TV as serving as an actual .020 POWERED INSPIRATION to modeling. They point AUTHENTIC SCALING - MACHINE CUT PARTS out that old aviation flicks are fre­ FREE FLIGHT - RUDDER ONLY R/C quently shown on late-late runs, and NEW! suggest examining TV logs for descrip­ tions o f forthcoming offerings. Some of these are admittedly real “ bombs” from a plot standpoint, but sometimes feature rare and exciting aircraft guaranteed to • · Goldberg's 1940 Sailplane Struck's 1940 New Ruler Berkeley 1937 Buccaneer make you reach for your 3-view collec­ 6:13 Scale 36" Span 31" Span / 150 Sq. In. 2:5 Scale 36" Span tion! $9.95 $9.95 $9.95 The Flying Aces Club o f Connecticut 1940 Megow Ranger $8.95 / 1937 Miss America $8.95 / 1940 Scientific Mercury $8.95 has even suggested compiling a list o f old movies which contain flying scenes, Standard terms to Dealers and Distributors. MICRO MODELS Mail orders: See your Dealer first. Add 75c since their titles do not always furnish P. O. BOX 1273 per K it fo r postage and handling. Cal. resid­ that sort o f clue. COVINA, CALIF. 91722 ents add 5% sales tax. Current fare also shown signs o f aviation influence every now and then. Helicopters and lightplanes are common “ props” on shoot-em-up series, as are airports. Then too, hang-gliders have turned up in such unlikely places as soap commercials and M.A.S.H. One o f the boys in “THE WALTONS” is a model airplane nut, and his efforts are frequently shown for a micro-second or two. Even Sanford and Son can be seen loading what appears to be an old tailplane into their junk truck at the end o f the show! KEEPING TRACK Model builders seem to suffer a common malady . . . a short attention span. Thus we find we can scarcely com­ plete one project before a more interes­ ting one comes along to distract one's partment. Materials required to furnish carefully avoided. Probably the best best intentions. Bill Krecek has gone so the inside are, for the most part, inex­ way to assure a clean appearance is to far as to draw up charts, in order to pensive and easily obtainable. The secret mechanically fasten the details, which keep track of all his current construction ingredient, as usual, turns out to be will then require very little, if any ad­ activities. The forms have categories for TIME. If satisfying results are to be hesive. As an example, the control stick Peanuts, Indoor, Jumbo, CO2, Gas, achieved, sufficient hours must be de­ can, in some cases, extend through the R.O.W., etc. Alongside each division is voted to the task. A few guidelines to floor-board and be glued on the under­ a check-off space indicating the status contemplate: side only, thereby presenting an abso­ of every project, such as: Proposed, 1. All balsa wood in the cockpit area lutely glue-free junction as seen from Ready-to-finish, Needing Repair, and which w ill be visible to a viewer should the top. Ready. be painted or covered. Otherwise, it will This combination mechanical/adhe- Needless to say, most o f us would look exactly like what it is . . . balsa sive method of installing components have a lot of blank space in the “ ready” wood. Painted paper is one approach has the added advantage o f keeping column, but a definitely crowded con­ for covering interior walls and floor. If everything ‘‘tied down” in the event dition in the “ proposed” area! · the coated variety is employed (such of a prang. Remember, the quality o f Main Sheet. . Continued from page 26 cockpit details is far more important as magazine cover stock), very little can pull out, or even worse, split the than the quantity. paint will be required, as compared to mast while being installed. Another common typing or writing-tablet stock. AEROBATIC SEAGULL ROUTINES disadvantage is that it takes a great deal 2. If pins are used to represent knobs, BY MARK SMITH of time to properly shape and finish throttles, etc., they will look exactly We are supplying the above well- a good mast. like pins. These items can be used as deserved credit line for any o f our read­ First step in making a wood mast the BASIS o f interior details, but should ers who may see the film “ Jonathon is to select a clear (no knots) piece o f be suitably modified so they will more Livingston Seagull,” since the producers, wood with straight grain. Next, trim nearly resemble the intended parts. for reasons best known to themselves, it to size for length and cross-section. While on the subject, pins are also a went out of their way to omit this im­ As an example, a 72 inch mast should poor simulation for rivets, and are portant information. Rest assured that be 3/4 X 9/16 inches and a 60 inch usually grossly overscale for that pur­ Mark Smith of Escondido, California, mast should be 1/2 x 3/8. pose. fabricated AND flew the model seagulls The next step is to determine the 3. Whenever feasible, the cockpit for the aerobatic and dive sequences shape of the mast and the taper from components should be painted PRIOR that appeared in the film, just watch top to bottom. For simplicity, the 72 to assembly. Trying to paint rudder for the bird with “ s tiff” wings. inch mast will be used fo r examples. pedals and such with a long, thin brush BACK TO THE BOOB TUBE Figures 1, 2, and 3 show the most after assembly, is not conducive to Time was when the television set common styles o f masts found in wood. neatness (or tranquility). was regarded as one of the worst detri­ Number 1 is not only poor looking but 4. Exposed glue joints should be ments to a model builder’s output. Now, will not allow the air to flow smoothly

62 MODEL BUILDER RETRACT POWER SYSTEM Η « * · ' FOR 4-CHANNEL FLYERS! POWERFUL NEW SERVO. SPECIAL SWITCHING SYSTEM AND 2-CELL BATTERY PACK-WIRED UP READY TO INSTALL. LIGHT! COMPACT! RETRACT A I- last! A way for 4-Channel flyers to easily SERVO (IN W IN G ) get into retracts. Our new power system is ready to go - just add 2 penlite cells, mount the trim-switch on your throttle servo, connect the retracts and that's it! When your throttle and trim levers are both moved all the way up or all the way down, your retracts w ill do the same! Servo has ample power, easily handles tri-gear operation.

RETRACT POWER SYSTEM Γ Carl Goldberg Models Inc. I 4736 W. Chicago Ave., Chicago. IL 60651 RPS-1 $29.95 I I am sending 25< for t pa. Illustrated Cats- ! log with Basic Esolanatlon of R/C Equlp- I mint and Radio Control Definitions.

P.S. For host service, see your dealer for items you want. If not available, ALL ITEMS AVAILABLE I Name___ write direct; add 50f. per item ($1 outsiJe U.S.). IN CANADA I Address. i l City_____ CARL GOLDBERG MODELS INC. I State. 4736 WEST CHICAGO AVENUE CHICAGO. ILLINOIS 60651 .Zip.

along the sides o f the mast. Number 2 is a tip about rounding o ff the sharp R/C GLIDER WORLD SPEED much better, but not as effective as corners use a piece o f 2 x 4 x 8 inch RECORD ATTEMPT Number 3. The reason for the flat back­ long pine for a sanding and shaping side on Number 3 is to attach the jack block, and have at it. Bring the wood wire, which holds the sail next to the down to a nice finish with 180 grit mast. aluminum oxide paper and check for Once you have selected the Number straightness. If all is well, finish sanding 3 type mast, scribe or pencil in a set with some 320 grit paper. Then use of lines to mark the width o f the jack your favorite wood finishing material wire table on the back (aft) side of the such as Superpoxy clear, varnish, or a mast. The so-called table is usually 1/8 clear urethane paint. inch wide. Make a corresponding set o f The spreaders should be attached marks down the front (fore) side of the to the mast about 28 to 30 inches up mast, as these lines will also be used from the base. The lowers are also for shaping. attached at the same point as the On the side of the mast, two thirds spreaders, and the attachment for the The Torrey Pines Gulls will host down from the top, make a mark at the top diamond supports should be 19 to 3 weekends of R/C glider speed rec­ front or leading edge. Draw a line from 20 inches down from the top. Drill a ord trials; April 6 and 7, 13 and 14, this to a mark that is one eighth o f an 1/8 inch hole through the mast and use and 20 and 21. A 1,000 dollars in inch back from the front edge o f the 1/8 brass rod to form the support for prizes for the fastest, record-breaking mast at the top. Now very carefully the tubing that will be the spreaders speed! Trophies for 1st, 2nd, and 3rd plane o ff this section. Now redraw and the diamonds. Next time we will place . . . record or not. All FAI and the double line on the front. discuss how to attach rigging wire, fit­ AMA rules will apply. Using the same method as above tings, and special gadgets. · Sponsors include: Kraft Systems, remove from each side a tapered section Model Builder, RS Systems, Astro from half way down the mast to the Counter.... Continued from page 6 Flight, Windspiel, Soarcraft, Airtron- top. The amount to be removed at the quality printed balsa . . . ics, Marks Models, Dumas Products, top on each side is 1/8 o f an inch. “ What’sprinted balsa, Dad?” Hobby Lobby, Williams Bros., RCM. Let’s double check what has been “ Get back to your Super Kaos, I’ll For more information, contact done so far. The top of the mast should tell you later!” the registrar: now measure 1/2 x 7/16 inch. * * * Linda Hoppe 7880 Caminito Glorita Next step to mark the sides o f the Long Island Hobbycrafts Inc., 722 San Diego, Cal. 92122, or; mast with lines to guide you in trimming Cross Bay Blvd., Broad Channel, N.V. The Torrey Pines Gulls the rest of the mast down to the proper 11693 has announced its latest Nick P.O. Box 1564 size and shape. Time and workmanship Ziroli stand o ff scale kit.. . the famous La Jolla, Cal. 92037 really show up at this point. To give you Boeing-Stearman Model 75. Decals and

MARCH 1974 63 PEANUTS!! O U R asr L A T E S T PLAN BEDE PLANS GENERAL ARISTOCRAT CABIN MONOPLANE BD-6 12” »pan. Stick and tissue construction. . . . 65 cents by Bill Hannon 1 6 " s p a n . For rubber power. Stick & tissue type. A c u t i e l ...... $ 1 0 0

FULTON HUNGERFORD SPOKE WHEELS. Fine light­ KARLSTRÖM weight units add the finishing touch to any vintage & DRAWINGS model. Many sizes available. WATERMAN RACER, by Dove Stott, F.A.C. SEND 25< FOR ILLUSTRATED CATALOG 12% >pan. Stick and tissue construction. . 65 cents Californio customers add 5% . W. C. HANNAN. GRAPHICS, P.O. BOX A PILATUS TURBO-PORTER Peanut plans by Hannon.75c FIRST CLASS postage add 35c ESCONDIDO · CALIFORNIA 92025

let and decals previously mentioned. another ad, and the manufacturer, be­ *£M0YM£#T He Suggested retail is $65.00. cause he now w ill have some proof that * * * he is using his money wisely when he R/C SAILING Midwest Model Supply Co., distri­ runs an ad in the magazine. The self FOR THE BEGINNER butors and importers . .. not to be con­ addressed stamped envelope, some times SNIPE TYPE fused with Midwest Model Products. . . called “ SASE,” will certainly help get a $16.95 ppd * will have a new R/C .60 engine in stock prompter reply because you’ve just re­ moved lack of envelopes or money for Length 25 3* Inches beginning March o f this year. Called Beam 8 >4 inches the "Meteor 60 Red Head,” this English stamps as an excuse for not answering Ballast Included import was used by Dave Haraker of the your inquiry. British R/C Aerobatic Team in Italy, In the Peanut Scale line (and they and features a single Dykes ring, vented spill over into other sizes also), we’ll piston design, bushed connecting rod, list a few suppliers we have used and double ball-bearings, Kavan carburetor, apologize for those we don’t include. removable prop stud (avoids necessity For high quality "w ire” wheels (balsa of replacing complete crankshaft if bent tires, silk spokes, and carefully scaled), in a crash), and muffler with pressure it’s hard to beat Fulton Hungerford tap. of 1770 Lilac Circle, Titusville, Florida TAHOE 600 Engine is manufactured under most 32780. These wheels aren’t exactly in­ Suitable for AM YA modern production processes, and pow­ 36/600 class expensive, but if you value your time er output is comparable with engines $31.95 ppd -· and want a super landing gear on an old currently available. Price, with muffler, time model, they are a must. length 36 Inches will be $84.95. · Several others handle nose plugs, Beam 9\s inches wheels, propellers, and miscellaneous Sail Area 600 sq in G nat...... Continued from page 49 supplies. These are: KITS FEATURE: the Peck-Polymers nylon button a per­ Peck Polymers, P.O. Box 2498, La • Preformed plastic boll, deck and components fect vibrationless bearing at high (or for simple 2 evening assembly. Mesa, California 92041. low) speeds. The little Guillow ’s 4 inch • Sails fabricated from Nylon Spinnaker Sailcloth. W.C. Hannan, P.O. Box A, Escondido, prop really buzzed for the .89 seconds • Complete hardware package. California 92025. • Step by step instructions include R/C details. that it took to run the 88 feet! A couple Marlow Engineering, 6850 Vineland, TAHOE 600 BALLAST PKG AVAILABLE; $3.50ppd. o f brass washers is all you need to take North Hollywood, California 91605. SAIL CONTROL UNIT (up to 36 in models) $ 2 2.95 Complete up thrust, as the plane actually lags Williams Brothers, 181 Pawnee St., SAIL CONTROL CONVERSION KIT USING YOUR behind the prop according to McCrack­ ROTARY OUTPUT SERVO MEC HANICS. S 10 95 ppd San Marcos, California 92069. en’s theory. VICTOR MODEL PRODUCTS Sig Mfg. Co., 401 S. Front St., It might be added that with a longer Boa 2168 Dept, h, Downey. C alif. 90242 Montezuma, Iowa 50171. loop of light rubber, this plane is a fair- ■§■ Calif, Res, Add 5% Tax Dealer Inquiries Invited Bill Hannan, of course, also sells to-Middlin’ sport flier! It would be plans, as do the following outfits: presentation booklet are included so better to make it without a symmetrical "Raceplanes,” by R.S. Hirsh, 8439 that you may duplicate any o f three aerofoil if endurance is your bag. Good Dale St., Buena Park, Calif. 90620. He versions; the Army Kaydet PT-17, Navy luck.______· has a very large collection of beautiful N2S-3, or Sammy Mason’s stunt ship, Mooney .... Continued from page 35 3-views (or more) o f many racing planes. “ Checkers.” The model has a 51 inch Cloudbuster Venture, P.O. Box 2921, span (top wing), 760 sq. in. wing area, First, LOOK AT THE ADVERTISE­ Livonia, Michigan 48154. and a dry weight o f 6 pounds. It ’s MENTS IN THE MAGAZINE. Almost Miniature Aircraft, Box 26263, In­ for .40 to .61 engines and 4 channel- always, if your local model supplier dianapolis, Ind. 46226. plus radios. doesn’t handle a supply you need, it is K it includes detailed plans, Williams advertised somewhere. Also if it ’s not Another outfit has things that will Bros, dummy engine cylinders, die-cut available locally, you can write to the probably interest all dedicated modelers, and pre-shaped plywood and balsa, hing­ manufacturer and manage to buy it. although they don’t sell model supplies es, control horns, torque tubes, wind­ If you do this, enclose a self-addressed as such. It is known as the Brookstone screens, formed wire wing mounts and stamped envelope. Also mention the Company of Peterborough, New Hamp­ landing gear legs, Goldberg tailwheel magazine that was carrying his adver­ shire 03458. Their catalog of hard to unit, wing hold-downs, aluminum en­ tisement. This makes two people happy; find tools affects me like Pavlov’s Bell gine mounts, plus the presentation book­ the editor, because he will probably sell affected his experimental dogs. I drool

64 MODEL BUILDER P r o ROD NYROD S u-Pr-ROD MASTEROD SIEROD-XF

The Leader in ADVANCED Push-Rod Systems for Over 7 Years PLAINFIELD, ILLINOIS 60544 a little. I doubt if there is a live modeler change when you have too much low around that won’t covet something in speed power oversteer. A lower numeri­ their wish book. Write for the free cata­ cal ratio will decrease delivered torque Box 26263 log and tell 'em Model Builder sent ya! to the ground. You may not be able to Indianapolis, Ind. 46226 use the additional top end but at least N t v / QO-page catalog FM-u only 50t ppa. We’ll try to cover Three View sources REV! MAPI an Sorias of scalo 3-views tor the to a small degree the next time we have the car will be more controllable. A belt solid modelers, scratch builders and plan drive which varies from Vhigh numerical collectors, in favorite scalest an article in the "Peanut Gallery.” · "0 · O tscriB t ton ______l i n e U Z i . MtPlan-l Ryan FR-I F ireball S 1 .0 0 t .50 ratio (6:1 to, say 4:1) will be O.K. on a MAPIan-2 Handley Page Heyford - 1,00 R/C Cars .... Continued from page 51 surface with good traction . .. but if it’s MAPIan-3 Blackburn FIrebrand V 1,00 ,50 MAPIan-k Ravy/Wr ight RV-I 1,00 ,50 the .156 or .175 in. diameter carburetor slippery, there may be some problems. MAP lan-5 Vultee P-66 Vanguard 1,00 .50 throat are about right. One thing you must be careful of NEVÍ M odernistic Plans Peanut Scale Seriest P-l Fairchild KR-21 13" span S 1 .0 0 Here in Southern California, Don when using tall gearing, is clutch wear. P-2 Mr. Mulligan OGA-6 " " i.00 P-3 hughes H-I racer " " 1.00 Amedo just chewed everybody up at the In most road courses, 4.5:1 is a pretty P-U Avla B-53U Fighter " " 1.00 good gear ratio. Clutch wear is reason­ P-5 Vaco 220 Taper wing " " 1.00 1973 series race with a 5 lb. car. A t the P-6 Beech Bonanza V-Tatl " " 1.00 next two races, he was wiped out be­ able, except with the super-power en­ P-7 Curtiss AE-3 Page racer " " 1.00 P-Q Gray Ghost (pusher) " " 1.00 cause he had too much power for the gines. A 4.25:1 ratio reduces torque P-9 P-5 IB Mustang " " 1.00 P-IO Chester's Goon " " 1.00 weight he was carrying. There were so delivery out of the hole and gives a P-lI P-5ID Mustang " " 1.00 many people practicing for the last little more top end, but the clutch will P-12 Stinson Reliant SR-8 " " 1.00 P-13 Howard DGA-I5P " " 1.00 series race that the traction was super only normally last a couple o f hours. P-lu Vought OS2U—3 K·fisher " " 1.00 P-15 Stearman PT-17 Kaydet " " 1.00 and his car worked great. The next two Going to 4.0:1 on a road course can P-16 Chester's Jeep " " 1.00 times out the traction was worse and he chew the clutch up in a few tanks o f gas. P-17 Cosmicwind Little Toni " " 1.00 P-18 Corbin Super Ace " " 1.00 should have backed o ff either on fuel, For an oval car where the acceleration SPEC iALl AH 18 in special plan I pack 13.95 carburetion, clutch or gearing . . . but he from low speed is minimal, a 4.0:1 ratio REV I Janick Peanut Scale Plansi H-I00 Witt»an Tailwind 13" span $ .75 didn’t want to lose performance, so . . . is O.K. H-IOI Piper Cub, dipped 12 3/U" " .75 L-IOO Fairchild PT-19 13" " .75 One other thing to consider is adding Seems as though what I ’ve said so far L-IOI jodel "D" 150 13" .75 weight by changing the flywheel. This is that on a sticky track, anything works SPECIALl A ll four plans for only S2 .0 0 1 may have a double effect. First the ve carry cut-to-s ize clear plastic for Mat­ (which isn’t too often), and you just tel Vac-U-Forms, 20 sheets per packagei weight is increased, and second the in­ have the horsepower. But when traction .005 SI.OO/pkg. .010 $!.25/pkg. creased flywheel inertia may decrease is off, there are lots o f little things you Postaget add 10% 3rd Class, 25% 1st Class. Plastic Scale Fits: A irtix. A irfra.e, Froa, the intensity o f the power pulsations. can do. All o f them decrease perfor­ Fujim i, Hasegawa, Hawk, H eller, L 6 S Labs, Eggshell - thin flywheels not only in­ mance on a good track but may improve MPC, Czech K2P, Monogram, R ich!»o, RARE- planes, Lindberg, Pyro, Revel I, Tamiya ...... crease the power pulsations delivered to performance on a poor or slippery Badger Air-Brushes, Im rey/Risley and Polly S paints, many decal lines 4 accessories. the rear wheels, but also decrease the track. Regular, free bulletins to steady customer.«. reliability o f the engine idle conditions. Same-day shipment on a ll orders, via fast In last month’s article on chassis ad­ and safe U.P.S. to L3 states, others go the There is some reasonable flywheel inertia justments, I neglected to mention wheel Quickest and best. Serv icemen, try us - we are experienced overseas packers. that is optimum. In other words don’t base. Longer wheel base has a tendency try to get the flywheel too light. to give a car more directional stability, tires and front axle caster may have to From what I can see, exhaust throt­ as long as the weight distribution and be used, particularly when traction is tles keep the crank case pressure up at relative aerodynamic forces remain fixed. poor. all times. When the throttle (exhaust) is If you just push the front axle forward, There are a few things which should opened, the back pressure is dropped, there is more weight on the rear be mentioned here which are not adjust­ the crankcase is filled and ready to go. wheels and less on the front. So what ments that can be made to a car, but In fact it appears that the greatest pro­ happens? . . . More high speed over­ rather, good racing practices that should blem is getting too much power when steer, but a little better low speed be adhered to in order to make the car the throttle is opened. There may be stability. Dump a stock car body on perform better or have a better chance some benefits (I’m sure there are) to this stretched chassis and you have o f winning. Most important, come pre­ working on an exhaust baffle, or butter­ something that is pretty good at low pared to race whatever you do have. Be fly, which opens gradually. speed, but watch out as the speed picks sure the radio batteries are good, all So far, I have only touched lightly up, because there is much less rear nuts, etc. tightened, have extra plugs and on gear ratio. Gear ratio should obvious­ aerodynamic down force than with a . . . I think you know all those other ly be changed if the engine peaks early sports car body. Short wheel bases, then, little things. on the various straight chutes on the have more turning agility for tighter Keep your car clean so that you can track. You should consider a gearing tracks. But to gain control, hard front tell when something is becoming worn

MARCH 1974 65 SO LONG, $735 O LD T IM E R 32" Span MINIATURES .020 FREE FLIGHT ALL CONTEST WINNERS

BROOKLYN DODGER, $735 32" Span STRATOSTREAK,$735 33 " Span PLAYBOY SR., $735 A t your dealer, 36" Span or add 75tf per k it for mail order.

CAL AERO - MODEL 7142 BLUESAILS DR., HUNTINGTON BEACH, CALIFORNIA 92647

steering and full throttle or partial throttle and full steering lock. Partial motion positions can be obtained more accurately if the servo motion is large. It is most important not to make changes too rapidly (unless the track is super sticky). Slower steering and throttle changes neither upset the traction balance nor cause the tires to lose traction. Well that finishes all the R/C car adjustments that come to mind. If I think o f any more I don’t believe I’ll admit to it. I’ll bet you didn’t realize how many adjustments there really are. On the other hand, maybe you have one or two more! Anyhow, next month all the adjustments and their effects will be summarized and tabulated, and Custom Built Fibreglass Since 1962 and then a computer program to optimize the adjustments will be pre­ Complete new catalog with HARTMAN FIBREGLASS sented . . . See you next month. · Chopper.... Continued from page 25 over 70 photos, full details blades exactly as shown on the plans ARGENTA, ILLINOIS 62501 and instructions, a higher degree of and prices, please send $1.00 PHONE AC 217 -795-2275 stability may be achieved by adding additional weight in each o f the blade out or has failed. Cleaning the car before it becomes a problem. But tips. Individual blade C.G. w ill move usually allows you to inspect it for remember, it is always better to balance outward and the increased mass will loose parts too. Normally it is best to all of the tires. produce a higher stability factor (rigidity clean the fuel filter about once or twice Some of the servo linkage setups are in space). Mr. Kavan recommends using per month during racing season and important too. If a high speed idle is the largest lead ball (included in kit) in also check the fuel line for cracks, etc. used, or you have an exhaust throttle, it each blade tip. Drill appropriate hole as (I lost a race because I didn’t do that.) is necessary to use a rear axle brake. The indicated in sketch, pound lead ball into Last month, I had several car chassis clutch bell cannot take the heat input the hole and secure with epoxy. The pictured. Did you notice that they were from both the clutch and the brake. surface may be refinished to shape with all pretty clean? Top drivers usually have With a high speed idle the brake should micro-balloons and covered. clean cars. be set to release quite quickly. Clutch Caution: the large balls weigh approx­ Wheel balancing seems to help a wear is a problem, and could be much imately 20 to 25 grams and are signifi­ noticeable amount, practicularly on the worse if there is too much overlap o f cantly large enough to improve stability. front. Balancing helps the tires wear brake and throttle (brake coming on Weights o f 40 to 50 grams are the smoothly. If they are not balanced, the while engine speed is still up). With a maximum recommended, although 80 tires seem to wear very erratically. On low idle speed there can be a little more grams are in limited use. The important the front end, the bouncing caused by motion for brake and throttle overlap. thing is . . . the greater the weight, the imbalance and out of round ness reduces The larger motion may mean a little greater the danger of blade failure or sub­ tire side force capability. The rear tires more controllability in the braking. sequent damage to persons or property if are usually softer and a lower density I personally like to use fairly long struck by a thrown blade. A t lift-o ff rpm, material. Imbalance is usually caused by servo motions on both the throttle and the forces are fantastic!! Getting hit with the wheel being out o f round rather than the steering. Sharp small radius turns or one o f these weighted blades would be rubber density variations as in the front long sweeping turns take full on or full like getting hit with a 100 lb. sack o f tires. The softness of the tire allows it to o ff throttle and steering. But for those cement . . . it would probably go right accept a certain amount o f imbalance intermediate turns, you need partial through anything it hits (like a bullet!).

66 MODEL BUILDER R/C TWIN FLOAT KIT FOR OFF-WATER FLYING FUN! Thi* kit contains two sturdy, seamless foam floats, ready for Painting and installation. Suitable for almost any .30-.60 engine *'*« model. FEATURES: · Tested and proven configuration • Use any type of waterproof paint • Suitable for fresh or salt water • Lightweight (less than 24 ounces) • Will support 12 pound aircraft • Complete installation instructions LENGTH: 3 6 " BEAM: 4 % ” PRICE: $39.SO SEND 25c FOR ILLUSTRATED CATALOG - t f c j A H S DEPT. MB . 181 PAWNEE STREET ___ SAN MARCOS, CALIFORNIA · 92069

NEW! $ 5 9 .9 5 RICXEY RAT • CURRENT FORMULA I RECORD HOLDER • HARDWARE, TORQUE RODS, DURAL GEAR • MOLDED COWL, CANOPY, PARTS • VIBRATION DAMPING, ALL-BALSA FUSELAGE • ONE PIECE CONSTRUCTION • HIGH ASPECT FOAM WING • ASSEMBLY JIG DETAILS

JACK STAFFORD MODELS 12111 BEATRICE ST.

S o.... keep il reasonable and safe. Make kit manufacturers include basic flying to bring to light interest in club activities sure the mechanical parts in the head instructions, perhaps it would be appro- and other special interests within the are in top condition at all times! (This po to include monthly information in hobby. Such a listing will be made applies to the “ nut on the stick” too! this column covering the areas o f pre­ available to all chopper pilots requesting Ha!) flight and learning to fly. More later... same. And speaking o f club activity, Next month, we’ll try to come up A considerable amount o f reader high interest is being shown in the with some words o f wisdom that answer response indicates a need for names, formation of a Southern California R/C- the question, “ Now that I ’ve finished the addresses and special help from “ local- Helicopter Association, particularly after ‘dern thing, how do I get it airborne?” area chopper pilots” . To this end, Model having been offered an exclusive flying We’ve had many questions from new Builder requests you complete the form site in the L.A. area, complete with chopper pilots requesting information on below and return it for filing in our paved heli-pads and wide, wide open radio installations, stick configurations, offices. We anticipate using the names to spaces for flying! Anyone interested? preflight and initial check-out proce­ determine R/C helicopter activity ... to Let’s get those data cards in the mail dures, tethering, training gear and how find out who can be contacted (by today! “ N uff said for this month, BCNU do you learn to fly? Although most beginners) for special skills, etc. . . and soon! · MODEL R/C HELICOPTER DATA CARD Complete and return to: MODEL BUILDER — CHOPPER CHATTER 1900 East Edinger Avenue Santa Ana, California 92705

Name: ______Age: ______Phone:______Address ;______R/C Helicopters: Interest only □ Building □ Completed □ Type model or kit:______—------Areas where help is needed:------———

List special skills you might share: Remarks: ______

MARCH 1974 67 All wood ailerons in two parts on each wing, operated differentially. CUSTOM R/C Perforated airbrakes above and below each wing, of wooden construction. INC. CAR PARTS Small end plate ‘bumpers.’ Total area of ailerons 1.44 m^ (15.5 sq. ft.).”

HRE - 300 Rear Brake Assembly (Aluminum drums, brake band Now how could he argue . . . or $6.95 mount, scrrws. liner.} prove you wrong? Besides, it’s all true

HRE · 200 Power Adjustable f Two bearing blocks, cep acrews. bell and readily available . . . and more . . . Rear End $ 16.95 bearings, pow er adjustm ent spacers.} from a recognized source. Incidentally,

HRE - 019 Engine Mount (fo r Vaco .19. machined aluminum. the three-view drawings, as well as the $8.95 cap screws, frontengine dam p.} photos o f the Super-J avelot, are direct from Wassmer Aviation, Issoire, France. HRE · 001 Chassis $8.95 (Made of .080.6061 T6aluminum.} Accurate and official. What else? A scientific eyeball analysis . . . it ’s the eyeballs that are scientific, not the HRE - 100 Front End ( fr o n t axle. Steering blocks, axle stubs. Assembly $26.95 steering arms, k ing pins Λ bearings, and analysis . . . indicates that the WA-22 cap screws./ Super-J avelot is well-suited to repro­ duction as an R/C model. The stabilizer area may be a bit marginal, but a quick numbers exercise using the formulae and HRE . 500 KYOEX Ki, $3.96 £ 2 & 5 5 S 5 E £ [ T ™ parameters suggested in the December

HRE · 240 Gear Bushing $1.49 (Steel bushing adapts Taurus gear to 1973 column will indicate variations (not shown) 1/4 O. axle; 1/4 I.O. x 3 /8 O.D.} that are needed . . . and how much . . . if any. Model construction techniques for HRE components can be used to upgrade your existing car (Associated, the Super-J avelot w ill vary with indivi­ Taurus, Thorpe, Delta, Marker, scratch, etc.). Or, you can use Associated, dual preferences, but a built-up fuselage, MRP, and/or Taurus wheels, gears, dutches, etc., to complete the HRE using 3/16 square longerons and up­ chassis assembly, and have fully adjustable front and rear ends to get the rights for the internal structure looks optimum R/C race car performance. promising. Would be a shame to not highlight the classic lines o f the aft fuse­ lage with fabric . . . or a modern count­ HALLUM RACING ENTERPRISES erpart . . . pulled taut over an open framework. P.O. Box 4658 Irvine, California 92664 The smooth contours of the forward fuselage can be duplicated fairly easily R/C Soaring . .Continued from page 44 The records maintained by the Soar­ utilizing soft balsa blocks and sheet Obviously, a model built to the 1/5 ing Society of America indicate that stock carved to the appropriate shape. scale would offer the greatest soaring there are no Super-Javelots registered The weight will be needed for proper potential . . . ‘cause it could better in the United States . . . at least, notas CG position, so why not have it come carry a reasonable weight for its area . . . of a couple of years ago. Could make from “ functional ballast” instead of and size and efficiency kind a go to­ it rough to develop scale presentation giving old dumb lead a free airplane gether. However, the 1/6 scale could be material, were it not for your local ride? Wheel installation can be solved ideal for the small field activity dis­ librarian. Fortunately, "Jane's All the w ithout much problem by using the cussed in the January 1974 column . . . World’s Aircraft, 1962-1963,” as well as technique shown for the “ Yankee Gull” if care was taken to keep the weight earlier and subsequent editions, contain in the March ‘72 issue. And any scale down to the 2-1/2 pound-or-less range. a generous amount o f data that could model looks ridiculous without a land­ But either size . . . or others . . . the impress most any judge. Like maybe ing wheel . . . assuming the prototype Super-) avelot should be a real crowd some o f the following regarding the had one. pleaser and attract much interest and wing, as quoted therefrom: The cockpit cover needn’t discourage admiration wherever shown and flown. "Incidence 4°. Single-spar wood the scratch builder. The simple way is And it would be a most unusual and structure, covered with wood forward to cut an appropriate section from one original model subject to create. of spar and with fabric aft of spar. of the large bubble canopies that are commercially available. However, if so inclined, the builder can readily create MOVING TO SOUTHERN CALIFORNIA? his own unit, and it will be quite comparable in quality to the store- bought items. MAKE SURE YOU GET A HOME The first step in “ rolling your own” WITH A MODEL WORKSHOP ! ! canopy is to carve a balsa form, in place on the model, to the proper out­ CONTACT: ANITA NORTHROP line and contour. Remove from the model and add 1/4 sheet balsa to the (714) 832 - 6200 (714) 547 - 3964 front, bottom, and rear surfaces which extends the form length and depth to provide material for final trim and clean­ O n t u Q i up on the finished canopy. Do not apply ANY kind o f surface finish, sealer, 21 or otherwise to the form . Just sand REAL ESTATE 18410 IRVINE BLVD. TUSTIN, CA. 92680 smooth, and then cover the form with a clean, soft cloth . . . such as a cotton

68 MODEL BUILDER WINDSPIEL/SOARCRAFT K e stre l 19 HIGHEST PERFORMANCE MODEL SAILPLANE

QUALITY ENGINEERED - ■ Beautifully finished white Gelkote fiberglass fuse­ lage • Custom-molded Canopy and Tray • Complete fuselage hardware • Resin filler for wing rod and hardware installation • Machine-cut wing and stab ribs • Complete Balsa and Spruce wood k it • Full plans and illustrated instruction manual with photos SPAN 134.5 in Identification Decals AREA. 852 sq. in. $69.95 L E N G T H . . . . 49.5 in. W EIG HT . . . 52 02. min. WING LOADING .8.5 oz./sq. ft. to 10 oz./sq. ft. Windspiel Models · 3704 Montgomery Drive Santa Rosa, CA. 95405 · Shop Phone (707) 544-2334 handkerchief. This should be stapled plan form should present no problems. Use spruce or similar hardwood for to the under surface and ends. Cut plywood templates for the ribs at wing spars. It ’ll take a lot o f sweat out Next, mount the form by some each "junction,” then sandwich the re­ of launches in rough weather, and at no device . . . such as a couple of large quired number of balsa rib blanks be­ weight penalty. When using spruce, eyebolts screwed into the bottom (not tween two plywood templates. Carve make the component one standard size through the hankie, Dummy) . . . so and sand the balsa sandwich to shape, smaller than would normally be speci­ that it can be secured to a stable base remove, and zap . . . tapered ribs. Repeat fied with balsa. For example, use 3/16 in some manner or other. Most hobby as necessary. It really works. square spruce in lieu o f 1 /4 square balsa. shops, catalog houses, or local craft and plastic stores can supply acetate or similar thermoplastic sheet. About 0.02 is the right thickness. From here on, it’s fun and games. Staple an oversize hunk of plastic sheet between two lengths of yardstick or similar "hand­ les,” put it into a 300° oven for a minute or two until the plastic gets limp and pliable, remove and use the handles to pull the plastic down over the mounted form. A pair o f gloves will be appreciated during this routine long after the echoes o f anguish have quiet­ ened. Besides, scorched flesh can stink up a whole kitchen. A not-so-good attempt can be re­ heated and worked again. A little ex­ perimentation with heat and time will be required. There are no set rules, except that of working quickly once the plastic is out o f the oven and headed for the form. And don’t put the form in the oven . . . and don’t ask how this advice was developed. Apparently, some builders use a Monokote-type heat gun instead o f the oven. Worth trying. This canopy thing may take several attempts before an acceptable item is fabricated, so enough material should be available to make 3 or 4 units. Remember that you’ll need at least one for the next show-and-tell bit at your club meeting. The whole thing is easy, but make it sound hard so you’ll be an expert in the eyes o f those who haven’t tried it. Like most o f ’em. "Qeez., it f lie s ...... lets find, a No reason that the wing can’t be conventional in structure. The tapered publisher."

MARCH 1974 69 things. Thermal ’’feel’’ isn’t as important during windy weather, and the lift is VINTAGE t -t FLANS more obvious anyway. FINAL COMMENTS ON NORDICS . . . EDO FLOATS 4 7" LONG CALM AIR DESIGNS AND FLIGHT PLANS $4.00 In the quest for the ultimate calm- air A/2 design, there have been many •theories advanced to attain this goal. A t this point, there have been some agree­ NOORDUYN MK.4 "NORSEMAN’ PIPER J-3 CU8 ments among the "experts” as to what FAMOUS CANADIAN AIRCRAFT FT Wing Span —o is ic n io iv . i.c.tw titm to look for. Here they are: ( ioeai fob r o s s ' iw in 'ob Y o u »') 84 WING SPAN - MULTI 1. Anti-fall-off towhook. w h e e l s · f lo a t s on p l a n s PLANS I I 3. »S PLASTIC c o w l: $ 7. 95 Plans: $12.95 2. Light wings. Not over 2 ounces per panel complete (less wire). WORLD WIDE 3. Small fin area for thermal seeking SEND SO 4 FOR 74 CATALOG TODAY / / trim. OEALERS ( DISTRIBUTORS INQUIRIES INVITED SID MORGAN 4. Rearward center of gravity (57- 13157 ORMOND, BELLE VILLE.MICH.48IIIU.S.A 62%). Good dead air time o f 2 min. 50 sec., plus. 5. High lift airfoil. 6. Good tow stability. 7. Fast, no spiral D.T. . . . for those 3:02 D.T.’s! Super stall recovery is not required or useful for several reasons: WALT MOONEY ALSO FEATURED 1. This type of setup is usually PRESENTS ARE CONSTRUCTION achieved by long TMA/high lift stab A FOLIO OF WELL ARTICLES (2) AND A combination, which can raise effective TESTED DESIGNS PAGE OF PHOTOS decalage to over 7 degrees, thereby kill­ SHOWING THE ing dead air time (too much induced INCLUDING 13 drag because the wing is forced to fly PEANUT SCALE ACTUAL MODELS beyond its optimum lift/drag coeffi­ PLANS, PLUS 2 SENO $5.00 (POSTPAID) cient). BONUS PLANS T0: WALT MOONEY 2. In light lift conditions, it is usu­ 2912 CABRILLO MESA ally best to "grease” the ship o ff the FOR OTHER SAN 01 ECO, CALIFORNIA TYPES. 15 IN ALL 92123 line, barely disturbing the glide, so stall recovery isn’t of vital importance. 3. More "bounce” for better thermal Weight will be about the same, but sidesaddled. But if the tow hook is seeking and centering power. It may with maybe something like twice the mounted either in front o f or behind sound like a paradox to say that the strength. the wheel . . . just to keep it on the “ firmest” anti-fall-off towhook is re­ A temptation to fabricate tail sur­ fuselage centerline . . . launches will be quired, when the need to float the faces for the Super-) avelot from sheet disappointingly shallow or very squirrel- model o ff the line is important, but if stock should be fought to standstill. ly, respectively. And elevator control you can feel a p u ff of lift, or see Such structure will only cause ballast can’t make up for the built-in problem. another model in good air in time to problems due to the short nose long Decorative trim should be applied for build up speed to max altitude at de­ tail moment ratio. A built-up, balsa realism. Ailerons and spoilers can be sired launch release point, the rest is frame is the only way to go. simulated quite easily with narrow . . . easy. Slow down until your ship appears Incidentally, plan on mounting the say, 1/16 wide . . . trim tape or strips to be hanging "s till” overhead, turn un­ towhook o ff to one side or the other o f of plastic covering material. Use black. til you’re facing downwind and whip the fuselage centerline. The landing Looks great when carefully applied top the reel straight back at your launcher wheel interferes with proper centerline and bottom. Use a ruler . . . keep it like a tennis serve. This should yield position o f the hook. The sailplane will straight. a no-bounce release . . . but it does take never know it’s being launched slightly Okay, men. Who’ll be the first? · practice. In conclusion, it’s important to real­ Free Flight.. Continued from page 39 chances are that just a little work will ize that no one has yet designed the just a simple rubber band retainer which improve its performance for you. perfect three minute dead-air A/2, but is tensioned enough to allow release SOME OTHER THOUGHTS the above recommendations should with a backwards tug on the line. The Along the same line, an A/2 can be prove useful for a starting point in rubber band is held in place on the made to perform better by trying differ­ giving it a try. The last thing to do is to fuselage by a wire loop. ent kinds o f towrings and towlines. For find a contest where there is dead air. I’ve given up trying, but since everyone Although there have been substantial instance; try two differently equipped is aiming at designing a ship for it, it developments in A/2 glider towhooks, towreels at your next flying session. The must be out there someplace. including the complex Russian Circular first one should be equipped with a no­ • towhook design, the basic requirements stretch towline and a large diameter, FEBRUARY MYSTERY MODEL in hook design remain unchanged. A thick ring for calm air and better ther­ Marc Tachett, Anaheim, California, hook must be adjustable and allow for mal "feel.” This provides a never-fail re­ was the first reader to mail in the correct any control which the flyer will give to lease system. The other reel should be answer to the Mystery Model contest for it. From that point on, i t ’s really the equipped with stretchy towline, such as February. He, and many others soon af­ model, the flyer and the air that deter­ monofilament, and a small, thin ring. ter, identified the model as Stan H ill’s mines winners or also-rans. Try fiddling This combination is ideal for absorbing Amazon. It was interesting to note that with your present hook design . . . windy towloads and saving wings and nearly every answer to February’s puzz-

70 MODEL BUILDER ler came from a modeler who had act­ ually built the m odel. . . either from the CLASSIFIED ADS Berkeley kit or, as in Marc’s case, from Non-commercial: Rate is 25 cents per word with a minimum of $3.00 worth. plans sent to him by Stan Hill. Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No This one turned out to be a bit of a mail-order discount house ads knowingly accepted. fooler, in that everyone guessed the air­ A ll ads are payable in advance and may be for any consecutive insertion period specified. Name and address free. Send ad and payment to; The MODEL BUILDER, plane correctly, but only a few seemed Classified Ads, 1900 E. Edinger Ave„ Santa Ana, California 92705 to know the designer! To quote part of a letter from someone who ought to SCALE PLANS. Big 30 x 42 Bluelines. All Finest kit plans of the '30's. Printed black know . . . 1" “ 1 foot. 3-Sheet sets: Douglas 0-25C, on white, showing all parts, all views. Send “ I don’t normally respond to 'Myst­ YO-31A/0-31B, Y 0-31C/Y10-43, 0-43A, SASE for newest catalog. J. W. Fitzgibbon, ery Model’ type items, but I really don't 0-46A, Fokker D-17; $4.50 each. 2-Sheet Box 13, Braintree, Mass. 02184. sets: Douglas 0-38, Davis D-1K; $3.00 each. think that I have any choice on your General Western Meteor, 1 sheet; $1.50. BACK ISSUES: Flying Aces, A ir Trails, February item since the Amazon shown Mailed folded and postpaid. PETER W. M.A.N., pulps, etc. List for SASE: is my wife Sandy’s design.” WESTBURG, 834 Seventh S t„ No. 6, AVIATION MAGAZINES, 24248 Crenshaw The letter, o f course, is from Stan Santa Monica, California 90403 Blvd., Torrance, Ca. 90505 (213) 325-3640 Hill. Stan goes on to point out that the Model airplane plans. Peanut, rubber, CO2, "DO-IT-YOURSELF AERODESIGN” - reputation o f the design suffered from gas. Free list. Send self addressed, stamped Sailplanes, FF, HLG, R/C Sport, Charts, Berkeley’s haphazard kit work, which envelope to: Modernistic Models, Box 6932 instructions - $4.95. Eric Lister, 953 Klock- Burbank, California 91510. brought about a massive error in the ner Rd., Trenton, New Jersey 08619. stab incidence. Par for the course... Graupner 212 Twin Jet Helicopter kit. Complete with all glue and training gear. FOR FUNI Miniature auto racing by As it takes the magazine at least a Cost $595, sell for $525. Bob Van Zee, radio control. Catalog and gift certificate, week longer to get to readers on the 567-34 Ave., San Francisco, Ca. 94121. $1.00 FREDZ - MODEL RACING SUPPLY. east coast than it does to those in South­ (415) 885-3064, or 221-1040. 184 Success Ave., Bridgeport, Conn 06610 ern California, we’ve decided to put a handicap system into effect. Starting 2. The Flyer (Maximus Idiocus): canard-pusher, twin-boom, twin-en­ with this month’s Mystery Model, ans­ Has been observed with models gined, 1/2A FAI Power model.” wers coming from local readers will have which appear to have been built be­ Sub-types: Tlje Creator, The Cogita- an 8 day handicap, from Postal Zone 1 fore 1960 and flown in every contest tor, The Enigma. a 7 day handicap, from Zone 2 a 6 day since then . . . and have. Notable 5. The Ideal Contestant (Ničemus handicap, Zone 3 a 5 day handicap, and characteristics are multiple colored Guyamus): so on down to 0 (zero) handicap for models... usually 41 or more shades Is usually seen at the site before any­ Zone 8. This should give everyone an o f red. Holland Hornet or K & B one else; assists others, especially the equal shot at winning. So, have at it, Greenhead engines and eyedropper CeeDee. Is also the last one seen on Easterners! tanks or pneumatic timers. Also the site, assisting with cleanup. He FREE FLIGHTERS WE ALL HAVE sports a series o f sliced scars on hands flies models about half o f the time, KNOWN and arms. Is usually found waiting in and is seen helping younger contes­ So far, I ’ve tried to include a little line near a large table or tent with a tants fly. Is never heard complaining, modelling ” humor” in each column and “ Timer” sign posted in front of it. prefers to compliment instead. Some- until forced to quit (by popular de­ Auditory cry: “ I’ve thought of build­ mand), I would like to continue. This ing a new model.” Index to Advertisers month’s attempt follows the great Sub-types: The Expert, The Rules American tradition o f classifying, iden­ Interpreter, The Old-Timer. Cal Aero-Model...... 66 Cloudbuster Venture ...... 54 tifying, and labeling everything . . . no 3. The Gadgeteer: (Fiddlimus Whir- C ra ft-A ir...... 55. 62 matter how big, no matter how small. rand Clickus): Dumas Products, Inc...... 2nd Cover We do it to insects, animals, fishes in Has been seen with the latest in Flyline Models ...... 61 the sea and out, words, models, en­ sophisticated equipment in hand. If Carl Goldberg Models. Inc...... 63 gines, etc. etc. ad nauseum. Unfor­ anything can be automated, it has W. C. Hannan ...... 64 tunately, no one has ever tried to do a been. Can spend hours moving from Hartman Fiberglass R/C ...... 66 complete categorization o f that most modeler to modeler, comparing his Hobby Capitol U S A ...... 1 lovable o f creatures: The Free Flighter. equipment to others at the site, Has HRE, Inc...... 68 Here is Model Builder’s attempt to fill a Rossi with 1975 stamped on its K & B Mfg...... 52 Kim-Kraft ...... 60 this much maligned void. The list is side. Usually has a larger head than Kraft Systems ...... 57 supplied in alphabetical order, by type. is normal for others on the field and Marlow Engineering ...... 60 An attempt has been made to state is characterized by a very neat and Micro Models ...... 62 typical characteristics, as well as sub- clean appearance. Miniature Aircraft...... 62 types and observable auditory cries. Auditory cry: “ Wait’ll you see the Model Builder Products ...... 56 1. The Craftsman (Buildibus Insani- next one.” Walt Mooney (Peanuts) ...... 70 tus): Sub-types: The Radio Controller, Sid Morgan (Vintage Plans)...... 70 Has been observed building models The Millionaire, The Other Guy. Model Rectifier Corp. (MRC). .4th Cover M S Ltd. . '...... 58 4. The Inventor: (Creatimus Non- 81 for years. Even boasts of the time Peck-Polymers ...... 59 one o f his creations flew, which Flyimus): Royal Products Corp...... 3rd Cover happened during the memory of no Has been seen with a stable o f out-of- Sig Mfg. Co...... 59 one at the site. Needless to say, the the ordinary models in hand. He Sonic-Tronics Inc...... 61 model made a perfect max and was goes to every meet with at least one Jack Stafford M od els...... 67 put away for safe keeping. Occasion­ new and unusual design. He has also Sterling Models, Inc...... 53, 54, 55 ally, the Craftsman is seen on the been found test-flying these crea­ Su-Pr-Line P roducts...... 65 field with a new creation in hand, tions . . . usually from within a large Tatone Products...... 59 but not-quite-ready-to-fly. Auditory crowd, much to their dismay. He is Victor Model P roducts...... 64 Vortex Model Engineering ...... 58 cry: “ My new one’s even better." the nemisis of the CeeDee, who Williams Brothers ...... 67 Sub-types: The Builder, The Perfec­ loathes his presence. Windspiel M o d e ls...... 69 tionist, The Measurer. Auditory cry: “ My next one is a

MARCH 1974 71 No. 10731 SUPER DOUBLER $4.00 FULL-SIZE PLANS Shoulder wing, pylon racerish sport R/C No. 3731 CORSAIR "F4U /C " $250 No. 3732 SATAN MK III $350 SERVICE for .35 to .40 engines. By Brad Shepherd No. 1731 SPROOSE GOOSE $4.00 (with instructions) No. 10732 SCALE EDO FLOATS $150 No. 1732 SPECTRAL $225 Scale floats for Lanzo Puss Moth or your No. 12721 DON QUIXOTE $3.00 favorite ship - 22" long. By Hal Cover. No. 12722 TOAD $3.00 No. 3741 OSPREY 1 $4.00 No. 1073-OT GOLDBERG ZIPPER $3.00 No. 12723 FORTY-NINER $150 Pretty R/C scale homebuilt flying boat. Most famous of all OT gas models, ended No. 11721 TORKY $150 Span 70", .40 engine. By Dave Ramsey. cabin era. Redrawn by Phil Bernhardt. No. 11722 SEAGULL $450 No. 3742 LITTLE GEM $2.50 No. 9731 QUARTER MIDGET P-40 $3.00 No. 11723 SKYRAIDER AD-4B $150 Winning QM racer from Sig Doubler kit. Easily built R/C model of famous fighter No. 10721 STEPHENS AKRO $4.00 By Austin Leftwich and Brad Shepherd. for racing, sport, stunt. By Jack Sheeks. No. 10722 M INI FAI $2.00 No. 9721 COLEEN-12 $3.00 No. 9732 FAIman 7 $3.00 No. 374-O.T. POWERHOUSE .020 $2.00 No. 9722 BABY BOOMER $1.50 Small but potent power ship for .09 eng. An .020 Replica of well known Sal Taibi No. 9723 LITTLE TOOT $350 Simple, inexpensive. By Bob Stalick 1938 gas model. By GeneWallock. No. 8721 BONZO, R/C $325 No. 9733 POU DU CIEL $1.50 No. 8722 COUNTERFEIT. A/1 $3.00 No. 2741 LITTLE TOOT $450 Cute little all-balsa semi-scale model of No. 8723 TAYLORCRAFT. F/F $150 Exact 2-112" R/C scale plans by designer famous homebuilt. CO 2· By Dan Walton. No. 8724 SHOESTRING, R/C $3.00 for homebuilt bipe. By George Meyer. No. 973-OT SPOOK 48 $3.00 No. 7721 FAIRCHILD 51 $3.00 No. 2742 LI'L SNIP $1.75 Well-known gull wing design qualifies for No. 7722 SAM -5 $250 Easily built 1/2A combat ship. Designed Antique Old Timers. By Snyder & Muir. No. 7723 COMANCHE "C " $325 for W.A.M. competition. By Rich Lopez. No. 8731 FOKKER O-VI $4.00 No. 7724 TRAVELAIR '2000' $4.00 No. 6721 WAKEFIELD $250 No. 274-OT PACER "C " $3.00 WW-I biplane fighter at 2"=V scale for R/C and .40 engines. By Philip C. Foster. No. 6722 MONGSTER $350 Sal Taibi's famous 1941 Nats gas winner. No. 6723 CALIFORNIA COASTER $350 60" span. Redrawn by Phil Bernhardt. No. 873-OT 1931 RUBBER MODEL $225 No. 5721 SEAHORSE II $3.75 No. 1741 WATER STRIDER $5.00 Record setting 1931 fuselage rubber job. Span 38". New plans by Phil Bernhardt. No..5722 HUMMING BIRD $3.00 Low wing, single float R/C seaplane for No. 5723 WHETSTONE $1.75 .60 eng. Span 75". By Bob von Koňsky. No. 7731 L.I.A.H.O. $250 No. 3721 YANKEE GULL $3.75 Trike geared pusher R/C sport plane for No. 3722 MISS COSMIC WIND $2.75 No. 1742 BRIAN'S BULLET $2.00 Cox .049. Different! By Bob Janiger. Excellent competition free flight trainer No. 3723 SIEBEL Si 201 $150 for Tee Dee .020. By Loren Williams. No. 7732 SQUARE CAT $2.50 No. 2721 MINNOW $250 Easy building profile carrier C/L for .36 No. 2722 FOKKER E-Ill $3.75 No. 174-OT EHLING '37 GAS JOB $4.00 engines. No gimmicks. By John James. No. 2723 E-Z BOY $2.75 Frank Ehling's 8 ft. span 1937 gas model. Stil! winning! Drawn by Phil Bernhardt. No. 773-OT LANZO 8’ GAS MODEL $4.50 No. 1721 SHOCER $350 Chet Lanzo’s famous ” Record Breaker." No. 1722 PUSS MOTH $3.00 No. 12731 QUASOAR II $4.50 Two large plan sheets. By Phil Bernhardt. No. 1723 WHITE TRASH $3.00 Beautiful 12 ft. span, V-tail. R/C soarer. No. 6731 WACO YKS-6 $350 No. 12711 CURTISS-WRIGHT JR. $3.50 Spoilers and air brakes. By Niel Liptak. Winner of 1972 Nationals F/F Scale Gas No. 12712 TWIN TRAINER $3.00 No. 12732 PULL-Q $2.00 event. Span 33-1/4” . By Bill Warner. No. 11711 NANCY $2.75 Easily built A/1 Nordic. Span 56-1/2". No. 11712 BI-PRENTICE $2.75 No. 6732 DRAGGIN· FLY $3.50 Proven contest winner. By Jean Andrews. Lightweight R/C glider for thermal soar­ No. 9711 BEANPATCH $3.50 No. 1273-OT INTERCEPTER $2.00 ing. Wingspan 7 feet. By Duane Hyer. No. 9712 FAIRCHILD 22 $2.25 An .020 Replica of popular Goldberg de­ No. 6733 HUNTINGTON H-12 $1.50 sign, kitted by Comet. By Wayne Cain. Price includes Third Class postage and Rubber scale model of first US home­ reprint of building instructions. Add 35 No. 11731 BIG JOHN the FIRST $5.00 built. Span 19". By Walt Mooney. cents PER PLAN for First Class postage Modified prototype of editor's notorious No. 673-OT ALBATROSS $3.75 Add 50 cents for orders outside of USA monster R/C biplane. By Bill Northrop. No. 5731 BANTEE $3.00 CALIFORNIA RESI DENTS ADD 5% TAX. No. 11732 BUMBLE BEE $2.00 No. 5732 WOODWIND $250 C/L Combat ship for .35 power. Features No. 5733 TEA KETTLE $150 SEND TO: THE MODEL BUILDER foam wing construction. By Phil Cartier. No 573-OT 1 AERB0.020 $2.00 PLANS SERVICE No. 1173-OT TRENTON TERROr $3.00 No. 4731 BRIEGLEB BG 12 $3.00 1900 E. EDINGER AVE. Gas job from 1938 Flying A Span 6’. No. 4732 ESPIRITU DE SAN LUIS $1.75 SANTA ANA. CALIFORNIA Simple lines. Redrawn by Phil Bernhardt. No. 4733 PEA POD $325 92705

times is seen with a trophy at the Well, there they are. Hopefully, you BUILDER’S EXPOSITION on Sunday, end of the day. will be able to add your own types March 31, 1974, from 10:00 a.m. to Auditory cry: “ What can I do to and descriptions to those suggested 5:00 p.m. at the Jefferson County Fair­ help.” above. Remember no single person ever grounds, 15200 W. 6th Ave., Lakewood, Sub-types: The CeeDee, The O ffi­ categorized any other scientific exer­ Colorado. cial, The Sponsor. cise, nor can one mind be completely This notice is a bit late, but any firm 6. The Trophy Hound (Glitterimus responsible for categorizing the crea­ wishing to have display space should Doggicus): tures on the free flight field. Others contact Tim Dannels, Model Museum Is seen on the field with the first are needed. Suggestions solicited. And Flying Club, 1265 Yates St., Denver, timer of the day. Continues flying before you get the wrong idea, the Colorado 80204. (303) 244-9062 after until the contest is over. Enters in above are not intended as value judg­ work, or 233-3292 from 8 am to 5 pm. every event, places in the top three ments or criticisms; simply exaggerated HELP! observations in their extreme. of all events entered . . . or else. We’re by no means involved in mak­ See you next month. · Never quite gets around to timing at ing a large collection of old engines, but a time-one-fly-one contest . . . and Workbench .. Continued from page 5 there are a few particular ones we’d has excuses for same. Drives a large like to get a hold o f in order to build up vehicle to accommodate his models be many indoor and outdoor exhibitions a display for our editorial office. If you and his trophies. Puts evil smelling o f R/C planes, helicopters, cars, boats have, or know of some clean and com­ fluid into most o f his models. and gliders. plete oldies, let us hear from you. We’re * * * Auditory cry: “Timer!” particularly interested in a 1938 Model Sub-types: The Complainer, The Mo­ The Model Museum Flying Club, with F Baby Cyclone, a 1940 type Mighty tor-Cycle Modeler, The Loophole cooperation from the major model clubs Atom and a Brown Junior, Model B, Finder. in Denver, is sponsoring a MODEL CorD. ·

72 MODEL BUILDER Blériot Relying more on determination and luck than knowledge of aerodynamics, Louis Blériot designed and produced the world’s first successful "true Blériot monoplane". This 1908 achievement gave birth to • wing span . . . . 51%’’ future record setting versions and eventually led • fuselage length . . 47%” • wing area . . . . 564 sq. in. to the aircraft that gained world wide recognition • e n g in e ...... 35-.40 by crossing the English Channel. • scale ratio . . . 1%” = 1 ’ • all balsa kit • authentic scale Spirit of St. Louis • p r ic e ...... $49.95 Not many years after Blériot made fame, another Spirit Of St. Louis history making flight winged its way over the For two unique projects which wing s p a n ...... 80 in. combine the excitement of scale English Channel and eventually settled down in fuselage length . . . 49%" with flyability, see both of these wing area .... 958 sq. in. France. This landing marked the end of Charles Royal kits at your dealer today! e n g in e ...... 45-.60 Lindbergh’s 3,605 mile flight across the Atlantic. scale ratio .... 1%” = 1 ’ In 33 hours and 39 minutes Lindbergh piloted his all balsa kit Ryan Monoplane, the Spirit Of St. Louis on a flight authentic scale p ric e ...... $49.95 the world would long remember.

d o y a l PRO °ucTS

_ i.iecT TENNESSEE /

Θ MRC has taken the A out of ARF! MODEL RECTIFIER CORPORATION . 2500 WOODBRIDGE AVENUE . EDISON. NEW JERSEY 08817

COMPLETE WITH RADIO MRC's Cessna 177 is complete in just about every important respect including an MRC Mark V five channel radio. Any beginner or confirmed sport flyer, can now own a fine scale model of this popular Cessna in completely finished, ready-to-fly-form. Make no mistake, this is not a formed sheet plastic ARF, but rather a fiberglass airplane that combines many familiar modeling materials for a look that was previously only achieved after many hours in your workshop. RUGGED AND READY Fuselage is rugged fiberglass, wing and stabilizer are fully sheeted, all control surfaces (ailerons, rudder and elevators) are hinged, all push rods are finished and installed, an Enya 35 is mounted, as is its tank; wheels are installed and the servo tray is in place. A strong tricycle landing gear features steerable nose wheel and Cessna style main gear. The entire aircraft is beautifully finished and striped in a three tone, fuel proof paint. IN THE AIR IN 1 HOUR Your entire work can be done in one hour and involves mounting the servos, connecting the finished pushrod to servos and placing the receiver and battery pack in place. That's about it, and you're ready for the best scale flying you've ever experienced. MRC's Cessna is ideal for the beginner who wants a trainer that looks great and can stand the gaff of his first flights. At the same time it's perfect for the flyer who wants a real looking airplane for stable flight and good maneuvers at those Sunday flying sessions. This airplane keeps you out of the shop and gets you onto the flying field .. . and isn’t that what it’s all about? Specifications: Wing span: 55"; Area: 500 sq. in.; Overall Length: 41"; Flying Weight: 5 lbs.; Power: Enya 35. with muffler; Radio: MRC Mark V with 4 servos.