JUNE 1973 85 cents volume 3, number 19 CARL GOLDBERG MODELS THAT ARE REALLY

Semi-Scale Beauty in a Great Flying Model! GREAT TO FLY!

Tough, Roomy Cabin and Front End, For 2 to 4 Channel Proportional. Steerable Nose Gear. Span 62". Weight 4V4 - 5 lbs. . . . For .35 to .45 Engines. FEATURES: • See-through cabin, with die-cut plywood cabin sides • Shaped leading edges plus sheeting '/jA SKYLANE • Cleanly die-cut parts that fit For Single or 2 Channel, • Clark Y wing section, hardwood Pulse or Digital. Span 42". struts Weight 22 oz. For .049 to • Steerable nose gear, formed .10 Engines. . $ 9 .95 main gear THE FLYING FALCONS More Falcons have been built and flown in the past 10 years than any other

1-Piece Full-Length Sides R/C. For values and features in a functional, rugged airplane, your best bet is a Falcon. Every design element engineered for simplicity and fast-building. FEATURES: All Deluxe, with top quality fittings Cleanly die-cut ribs, fuse sides, Now With 1-Piece Full-Length Sides. Takes 2 to 4 Channel Pro­ Coil-sprung nose gear. . . formed formers, etc. portional. Span 56". Weight 3 '/2-4Vi lbs. For .15-.19- 35 Engines main gear FEATURES: New simple “ Symmet-TRU” wing • Semi-symmetrical wing section Shaped and notched leading and construction • Coil-sprung nose gear. . . trailing edges formed main gear J & S K y iA R * : • Shaped and notched leading and For Single or 2 Channel, F A L C O N 5 6 $19.95 trailing edges Pulse or Digital. Span 37". The Medium-Size Trainer. Takes Single to 4 Channel Proportional. Rudder- • Cleanly die-cut ribs, fuse sides, Weight I 802. For .049 formers, etc. Engines. . $8.95 Only or Multi-Training. Span 56". For .15-.19-.35 Engines. • New simple "Symmet-TRU” wing construction SR . F A LC O N $36 95 The Standard Big Trainer. For 4 Channel Proportional. Span 69". For 35 to •ol) tngines. C k o e s t iw q $2995 The Hnnds/Par Goodyear RarprRacer With FnmiøhEnough Ju ^F A L C O N $7.95 Area and Stability So You Can Fly It! For 4 Channel Proportional. Span 54"; Area 540 sq. in.; Weight 4V2-5 lbs. For .19-.40 Engines. FEATURES: ^Engines'31"6'' ^ ^ °Γ 2 Channe'’ PU'Se °Γ Dígital· Span 37"· For • Shaped leading edges plus sheeting • Symmet-TRU wing construction • Full-length sides, sheeted trailing edges * · * -«■ • Cleanly die-cut ribs, formers, etc. • Formed spring aluminum landing gear ,OOK «HAT A MODEL» i „ W * >·» « “ “ • Semi-symmetrical wing section.

RANGER 42 - H995 \■ -ha« - ?S’ longrøV ButΛ withL h Vthe help ...... The Versatile Almost- accomplished twe - d start AVAILABLE IN CANADA Ready-To-Fly Fun Model. Takes Single Carl Goldberg Models Inc. again.” Dr. Cecil L Wiley 2546 W. Cermak Rd., Chicago, III. 60608 to 4 Channel Propor­ Wilmington, Caht. tional. Also Free 0“ d!?! 25t ,or 8 Pi- Illustrated Cata- P.S. R /r μ1' ΐ · . Recommendations in Starting in Flight. Span 42"; Weight 26 02. For .049-.10 Engines. want and rJ i» r E,xplana,lon of R/C Equipment If not available, w rfte X e c t^ ííd 35etemS you ana Radio Control Definitions. (75C outside U.S.). Minimum offer g i ° Ρ" l,em Name______CARL GOLDBERG MODELS INC Address_ City____ 2546 WEST CERMAK ROAD « CHICAGO, ILLINOIS 60608 State -Z ip. WINGMASTER A NEW KIT FROM KRAFT

A new concept in R/C flying. Build it in 5 hours. Fly it for less than $200.00 total investment including all R/C equipment. RADIO: 2 OR MORE CHANNELS WEIGHT: 4 TO 6 LBS. WING SPAN: 56" POWER: .40 TO .60 t f i ' L J

COMBAT FLYING CLASS PYLON RACING "CUSTOMIZED” WINGMASTER Wrile for Free Catalog 450 WEST CALIFORNIA AVENUE, VISTA, CALIFORNIA »2003 World's Largest Manufacturer of Proportional R/C Equipment HADEI THE IDEAL R/C TRAINER FOR .19 .29 ENGINES UP TO 3 CHANNEL RADIO EQUIPMENT

LENGTH: 42” *23,s EASY TO BUILD Sturdy, built-up balsa construction and light wing load­ WING SPAN: 57” ing combine in the Kadet to produce a perfect sport WEIGHT: 4 LBS. or beginners’ model. The flying performance of the high-lift, flat-bottomed airfoil is responsive to control and inherently stable. A tricycle landing gear helps ground handling, take off and landing characteristics. Handy Pnnted Faselage Sides — Build In­ KIT RC-31 We predict that this compact bundle of dynamite will ternal Structure Directly On the Wood. quickly become THE standard RC Trainer. Molded Plastic Engine Cowling. Formed Nose Gear with Shock-Absorbing Coil. Torsion Bar Main Gear. Hardware Package Includes Nylon Nose Gear Bearing. Nylon Control Horns and Molded Nylon Surface Hinges. Die-Cut Plywood and Balsa Parts. Top Quality Balsa and Hardwood. Designed by CLAUDE McCULLOUGH Full Size Plans. Complete Illustrated Building and Flying Instructions.

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The MODEL BUILDER 1 NO ONE SHOULD BE WITHOUT.. The ODEL U l 1900 E. EDINGER AVE., SANTA ANA, CALIFORNIA 92705 The MODEL BUILDER is published monthly. Regular sub­ scription rates are S8.25 for one year and S14.00 for two years. Add S2.00 per year for subscriptions outside of U.S. and Canada. Add S1.50 per year for Canada and Mexico. Please enclose check or money order. Do not send cash.

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S t a t e ------Zip el uefeij ( ) One year at S8.25 ( ) Two years at $14.00 Begin with

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2 The MODEL BUILDER T h e JUNE

ODEL 1973

UILDER volume 3, number 19

STAFF CONTENTS FEATURES EDITOR Wm. C. Northrop, |r. WORKBENCH, B ill N o rth ro p ...... * ...... 4 GENERAL MANAGER Anita Northrop OVER THE COUNTER, B ill N o r t h r o p ...... 5 EDITORIAL ASSISTANT Le Gray R/C PYLON, Tom Christopher ...... , ...... |2 SECRETARY Debbie Hopper R/C SOARING, Le G ray...... 14

SUBSCRIPTION MANAGER RADIO CONTROL REPORT, F ra n k S c h w a r t z ...... - ...... 20 Jo Ann Jones CONTRIBUTORS PLUG SPARKS, Jack Transue ------...... ------...... - 25

Tom Christopher MAIN SHEET, D o n P rough...... 28 Ron Evans HANNAN’S HANGAR, B ill H a n n a n ...... 29 Bill Hannan PEANUT GALLERY, W a lt M o o n e y ...... 30 Dick Mathis

Walt Mooney SCALE F/F, F e rn a n d o R a m o s ...... 34 Fernando Ramos FREE FLIGHT , R o n Evans-*------...... 36 Γ rank Schwarts

Jack Transue CON I ROL LINE, Dick Mathis & Dale K irn----...... 39

ADVERTISING REPRESENTATIVES I ETHE RED CARS, Ted Maciag ----...... - ...... 41 EAST: Auke Venema, 79 Adirondack Ave. Spotswood, N.J. 08884 PHYSICAL FI I NESS, Bob Isaacson ...... - ...... 43 (2011 251 2860

WEST Bob Upton, 20626 Clarendon Ave. SCALE VIEWS Woodland Hills, California, 91364 AS-WI7, A s tro F l i g h t ...... 16 (2131 883-7681 HEINKEL He 72B-2, Flying Scale News & V iew s ...... - ...... 4 4

Subscriptions $8.25 per year, $14.00 two CONSTRUCTION years. Single copies 85 cents. Add S2.00 for postage per year outside of US. (Except WACO YKS-6, B ill W a r n e r ...... 9 APO). Add 50.75 for Canada and Mexico. DRAGGIN’ FLY, D u a n e H y e r ...... |7 Copyright 1973 The MODEL BUILDER. All O.T. ALBATROSS, G e o rg e R e ic h (P h il B e r n h a r d t ) ...... - ...... 24,26 rights reserved. Reproductions without per­ mission prohibited. PEANUT HUNTINGTON H-12, W a lt M o o n e y ...... - ...... 30 Published Monthly by The MODEL BUILD­ SWAMP RAT, SLOW COMBAT, D ic k M a t h is ...... 38,40 ER Magazine, 1900 East Edinger Ave., Santa Ana, California 92705. Phone (714) 547-3963 Cover: Bill Warner's 1972 Nationals F ee-Flight Scale Gas inner was this beautiful Waco YKS-6, built at 1 inch to the oot scale. This Ecktachrome photograph was Second Class postage paid at Santa Ana, Ca. taken cn a light overcast day at Orange County Airport, Santa Ana, California, along side of the Tallmantz Air Museum. That is Frank Tallman's Grumman "Duck" in the background. Photo by Bill Northrop.

The MODEL BUILDER 3 Here are 15 of 24 identically marked Aeromaster Bipes that make up the "Hawk Squad," an interclub group that flies demonstrations in the Omaha, Nebraska area. They have been most responsible for bringing about the "First National Multiwing Championships," a contest lim ­ ited to planes with two or more wings, to be held July 7 and 8 in Omaha. More info in text.

-from Bill lUorthrop's workbench · . ·

In case you hadn’t noticed, we’re hoped that this will be the successful an A-Number-One, genuine, eighteen kickoff for a popular annual affair. carat, saw-dust breathing biplane nut. We don’t see how it can miss. Since our earliest days of writing to The meet is being sponsored by the the modeling public, one of our pri­ “ Nebraska-lowa R/C League,” which mary objectives has been to promote consists of the Omahawks, Nebowa, two-winged aircraft for sport and com­ Frontier Flyers, and Cobra R/C clubs petition. Therefore, it is only natural with a combined membership of over that Olie Olson, Omaha, Nebraska, 200. Prizes will consist of trophies, should write to us about a contest engines, and first line biplane and tri­ scheduled to take place on July 7 and plane kits. 8, 1973, for which he is the C.D. To quote Olie, “ We are introducing The contest is a full fledged, AMA “ Free Style” to the pattern event, sanctioned R/C meet with Pattern (No­ flying the Class A pattern as school vice and Expert), Sport Pylon, and maneuvers o f the flyer’s choice com­ Sport Scale . . . and the big hooker is bined into one presentation through that it's limited to biplanes and tri­ smooth transition flight. Scoring of planes! (We’re sure you wouldn’t be all maneuvers will be per AMA. In thrown out if you showed up with a addition, transition will be judged 0-10 quadraplanc.) and overall free style presentation qual­ To be called the NATIONAL MUL­ ity will be judged 0-20.” TIWING R/C CHAMPIONSHIPS, it is Sport Pylon will be per AMA except

Who is this editorial contributor to MODEL BUILDER magazine? Fabulous prizes for correct answer{see text). Photo was taken in the Spring of 1941. Wonder how it flew.

that minimum airfoil at root (?) will be lowered to 10 percent, and mini­ mum wing area will be increased by 25 percent. Sport Scale will be per AMA provi­ sional rules. Sounds Great! LET’S RECIPROCATE Most R/Cers who have been in the game for a decade or more need no introduction to Dr. Walt Good. In case the name doesn’t ring a bell, let us very briefly explain that this member of AMA Modeler’s Hall o f Fame is probably as much responsible for the very existence of radio control model­ AMA's hard working District X Vice President, Alex Chisolm, and his wife Marlene, set up and manned this booth at the American Cancer Fund drive put on by Orange County (California) ing as we know it today as any single model clubs at Mile Square, Fountain Valley. Continued on page 61

4 The MODEL BUILDER OVER THE COUNTER

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To round out his retractable landing the bearings, packed four to a bag for gear package, Carl Goldberg is now 75 cents, have thin, tapered tabs with offering a powerful servo system for holes for glue penetration, and provide $29.95. The system includes a sturdy a precision fit for 3/32 wire. servo with a triple output fitting which * * * will operate a trike-gear, a two micro­ J&J Industries, Box 202, Oakhurst, switch control unit, and a 2-cell battery N.J. 07755 announces production of box . . . all wired up and ready to work. Tony Bonetti’s “Troublemaker". This Nice thing about this power package all balsa kit has been endorsed and is that is doesn't require a fifth channel approved by Tony for production by in the usual full-house control system J&J. in order to operate. The double micro- The $59.95 kit includes die-cut ribs, switchcontrolunitmountson the throttle pre-cut plywood and balsa formers, pre- servo and operates the gear by use of cut rudder and stabilizer, pre-cut full the high and low trims on the throttle length fuselage sides,pre-cut ply doublers, channel. If preferred, of course, a landing gear and fittings, aluminum fifth channel . . . and servo . . . may be engine mount, hardware, and rolled used to operate the switch control. plans. Hallum Racing Enterprises' cradle mount for Carl has also taken over the marketing K & B .19 engines’ in R/C cars. of D) Multi-Stripe, a product which we described several months ago. This unusual striping tape, available in five colors . . . red, white, black, gold, and dark blue . . . and in four widths . . . 1/16, 3/32, 1/8, and 1/4 inch by 36 feet long . . . achieves its final fuelproof bond after several hours in the sunlight. It is very thin, takes curves quite well, and becomes as permanent as a painted stripe. Another new Goldberg item is Roy K le tt’sAileronand ElevatorHorn Bearing. J & J Industries is producing Tony Bonetti's "Troublemaker." The designer-approved kit In keeping with the usual Kleti quality, is all wood construction. Price is $59.95.

Dumas' DEEP VEE 60, a 38" long, 14" beam deep V boat for rough gears. System w ill operate off throttle control or additional servo. water racing. All wood construction.

The MODEL BUILDER 5 packaged separately. * * * Dumas Products, Inc., 790 Park Ave., Tucson, Ariz. 85719, now offers a racing boat for rough water sailors. This is the Deep Vee 60, a 38 inch long by 14 inch beam Deep V boat for .40, .60, or larger engines. Plenty of room for radio gear and fuel . . . it’s a good boat for endurance racing: All wood construc­ tion, with die-cut poplar plywood frame­ work, with birch plywood bottom, sides, and deck. Price is $39.95. Something new in trophies and plaques by Cheslock Designs. Trophies are hand screened graphics * * * on plexiglass, plaques are aluminum on walnut base. Different. Windspiel Models, 3704 Montgomery Dr., Santa Rosa, California 95405, is adding several new R/C sailplanes to its line of imported and domestic silent flight aircraft. The LS-1, by Wanitschek, is a semi­ scale model with 98 inch span, 583 sq. inch wing. Kit includes epoxy-glass fuselage, machine cut wing and stab ribs, and all spar stock. Uses modified Eppler 387 airfoil. A V-tail version LS-V is also coming. Wanitschek also produces an epoxy­ glass replacement fuselage for the Graup- ner Cirrus weighing only 9 ounces. Another Wanitschek product being offered is the Orlice. This is the Czechoslovakian Standard Cirrus V-tail sailplane in 1/5 scale, with a span of 3400 mm (134 inches). This is a complete kit. The company is again stocked with

Satellite City's Satellite 1000 is available in partial kit form. K it includes full size plans and 130 Baby Kurwi’s by Wilhelm, who also machine-cut parts. SC also markets clear mylar for covering and "H ot S tuff", an instant glue. manufactures the Kurwi 68 Universal Glider. Su-Pr-Line Products now markets an 2 inch radius curve. Windspiel will shortly be coming out assortment of tubing-in-tubing and calbe- Masterod-KF is even more flexible, with the 604 Glasflugel version of the in-tubing push-rod systems. The origina­ and w ill operate around a Ά inch radius 22 meter Kestrel. The Soarcraft Kestrel tors of this method of carrying servo curve. 19’s are now in full production as output to control surfaces, the company In a completely opposite direction, complete deluxe kits, with white gel- has added several interesting variations to ProRod’s are totally rigid wood push coated fiberglass fuselages, pre-cut wing the original and still popular Nyrod. rods, drilled on center to take threaded and stab ribs, all hardware, canopy, and Su-Pr-Rod is a 44 inch long version of end-fittings, thus no gluing is required. tray with instrument console. the Nyrod, both of which will operate All rod sets include appropriate hard­ * * * down to a 3Zi inch radius curve. ware,such asclevises, double-end threaded Cheslock Designs RD 1, Box 130, Masterod is a flexible cable enclosed wire rods, keepers, etc. A ll hardware, Lincoln University, Pa. 19352, phone in tubing which will operate down to a plus additional fittings, are available and 215-932-3924, is producing an interes-

The JenEsco Engineering Refueling Manifold and Shutoff Valve. May be used with or without R/C glider Tow/Chute by White Co. Hand­ pressure. Keeps plumbing neat. Avoids fuel spill. made of quality materials. Price $8.00.

6 The MODEL BUILDER The "T odi" R/C glider by Dodgson Designs features flaperons that operate from minus 10° to plus 30°. Plane mill fly fast, slow, inverted . . . or what have you .... A in 't she cute?

Snappy Products flight and tool box will carry two gallons of fuel.

Todi's fuselage is combined fiberglass pod and rolled balsa boom, totalling less than 4 ounces. Kit includes materials for two wings; 100-1/2" and 76-1/2" spans. black graphics in aluminum. elliptical planform wing and stab, is a Graphics appear to be reproduced foremost design which holds, as of photographically. Prices range from March, 1973, eight AM A records! Cate­ The 1973 Cox Tee Dee .049 by Kirn-Kraft has 8 to 16 dollars. gory I A,B,C Junior (1971); Category I fine-thread needle valve, left-hand crank option * * * Open C at 73:24 (1971); Category I ting and different line of trophies and In Free Flight Circles, the names Open C record at 34:54 (1972); Cate­ wall plaques aimed primarily, at the Satellite, or Bill and Bob Hunter, don’t gory I Open B at 24:04 (1972); and moment, for R/C competition. raise too many quizzical glances. But in Category II Open C at 26:41. The 1300 The trophies are fabricated from case you’re that far out of it, this father sq. in. version also holds the Western bronze tinted plexiglass and screened in (Bob) and son team is in the top States special Class D record of 25:00. black, with graphics relating to Pattern, echelon of Free Flight design and com­ The Hunters, under the name "Sate- Scale, Soaring, and Pylon. Plaques are petition. Their series 70Satellite, featuring Continued on page 60

New fiberglass hull tug boat design by Clayton Thoms, in photo, is Boat is model of Harbor Tug "Douglas Greg." Length 42", beam being marketed by Hartman Fiberglass R/C. Price is $135.00. 11-1/2", and displacement is 33 pounds. Electric or steam power.

The MODEL BUILDER 7 8 FULL SIZE PLANS AVAILABLE - SEE PAGE 64 The MODEL BUILDER WACO YKS-6 By BILL WARNER . . . Even if it hadn't won first place in F/F Scale Gas at the 1972 Nationals, this beautiful model of a plane from the Classic Age of aviation would deserve top billing.

One o f my recent hang-ups is that drawing with just enough detail to make The NATS in Chicago requires a bit I cannot build models that I find it interesting, but not so much as to make different plane than the NATS in Califor­ uninteresting. If I wanted to take the your model look stark because you didn't nia. A light, flu ffy antique which might easy approach to contest FF Scale work, put it all on. do superbly at Los Al has no place in I think I’d build a simple homcbuili monoplane and just build it like the original. Most o f us, however, don’t work rationally when confronted with that LOVE-AT-FIRST-SIGHT 3-view or photo. When narrowing down subjects to build for a particular contest, I always very scientifically go through hundreds of subjects, narrowing down the choices by process of elimination. First, you throw out the ugly and common subjects. Next, you eliminate the ones on which you have too little data. Following that go the ones with paint schemes beyond your capabilities, ones with poor moments, high wing loadings, small stabs, ones which someone else has already built much better than you ever could, etc. Then you have a couple of beers and let a couple of your toughest competitors (Bobby Haight and Chuck West) talk you into a model which they just know will drive you up the wall. To compound the problem, buddies like this will also lay some nifty exterior and interior color photos o f the real aircraft on you just to make sure that you can’t resist! Clinching the whole Even in this close-up of the cabin area, the Waco doesn't look too much like a model. The thing was the great Paul Matt 3-view amount of detail is not as amazing as is the short time it takes Bill to crank it out! 9 The MODEL BUILDER 10 FULL SIZE PLANS AVAILABLE - SEE PAGE 64 The MODEL BUILDER This shot was taken by Joel Rieman at the NAR Flightmasters' Annual, where Bill and his Waco also took first in F/F Scale Gas. Some field stubble caught the upper left wing in a flip-over. Built in the "brick outhouse" tradition of P.E. Norman, the ship can really take it.

the rain and wind at Glenview. Taking from 1/32 inch (male) brass tubing a hint from the British, sturdiness was fitting into 1/16 inch (female) tubing. the byword from the beginning. Extra Removable battery (9v transistor) and gussets, plywood reinforcements, and a simple pull switch on the panel will extra-hard fuselage-box longerons proved completetheset-up.Panel, tail, and cabin later to have been well worth the added lights can be easily added to the circuit. weight. In test-flights and several crashes, Interplane struts are made of flattened the silk covering, knock-off wings, and aluminum tubing with Robart brand strong fircwall/cabin/undercart construc­ hinge points (nylon ball-socket pop-out) tion made those critical first few flights used for the attachment to the wings. possible. A front-heavy, clean design The “ N” strut was originally fastened also seemed to make sense considering together with 1/16 inch thick double­ the wind conditions expected. sided tape, but silicone rubber tub Armed with instructions from WCN caulking might be better. not to go into basics of construction, FUSELAGE etc. as anyone attempting this model Make sure front end is solid. Thin would be either a pretty experienced plywood (1/32 inch) firewall affixed to The Waco doing its thing. The name of the game is "Flying Scale." so fly it does. builder (or a nut), rendering any such Continued on page 46 coverage somewhat less than productive, I shall constrain myself from excessand superfluous verbosity in the interest of minimizing obfusetion . . . (Too late, Bill, you already done did it! — wen). WINGS Tips laminated with thinned white glue. I can’t remember whether or not I used spruce for the spars, but if I didn’t, the balsa I used was extra hard. The spars on top of the wing cost scale points, but sure keep that ol’ wing from bowing upward. Making ailerons adjust­ able with bendable aluminum sheet (not soft wire) "hinges” is a must for on-the-spot flight trim. The wingtip lights may be easily made operating by using model railroad "grain-of-wheat” bulbs wired to a simple male-female All gassed up and ready for a night flight to Las Vegas for dessert and a little gambling. Note the plug at the wing root rib. Built it up chart in seat-back pocket. Door latch works. Inside of cabin is covered w ith silkspan "liner."

The MODEL BUILDER 11 Ant's eye view of Quarter Midgets on the starting line in Jacksonville, Florida. Gateway R/C Club, Bill Atkinson, Starter. Let's get outa here!

have a few comments: QUARTER MIDGET RACING IS HERE TO STAY! The championship racedrew forty entries due to the rewards and prestige of the ÍPYLON event, not to mention the fun of it. I By TOM CHRISTOPHER As the rules, which are now up for adop­ tion by AMA, read, “ Engines stock R/C QMRC CHAMPIONSHIP RESULTS, type. Carburetor must be stock R /C . 15 March 18, Mile Square. size catalogued for the engine used. No 1. Jeff Bertken (Valley Flyers), reworking allowed on either engine or Francis P-51, K&B. carburetor. Both must be available 2. Kent Nogy (Valley Flyers), House FLORIDA PHOTOS BY RON KIRN through normal retail channels and made of Balsa Shoestring, K&B (Fastest in quantities of WOO or more. No Time 1:32). pressure allowed." φ The Quarter Midget Racing Club held 3. Chuck Brown (QMRC), Original Without a doubt, if this rule is its First Annual Championship Race Firecrackers K&B! adopted as read, it w ill cause some hard March 18, Mile Square, Fountain Valley, 4. Ray Emery (Vista, Calif.), Minnow feelings and confusion. There are two California. K&B. ways that this particular rule can be Jeff Bertken (Valley Flyers) emerged 5. Tom Christopher (QMRC),Stafford made workable. First, one must define as QMRC Champion for 1973. Jeff P-51, ST. the words “ Stock” and "Reworking” . flew a Francis P-51 built by Paul White 6. Gary Hawks(QMRC),Minnow, ST. Just what do these words mean to you? with engine by K&B. Jeff flew a very How can one enforce such rules? consistent race and finished five rounds Now that the reporting is finished we Why not have, along with a printed of racing with 17.5 points. There was a three-way tie for second between Kent Nogy (Valley Flyers), Chuck Brown (QMRC), and Bob Emery (Vista, Calif.). Nogy finished the fly-off in first with Brown and Emery following. Fifth place was captured by Tom Chris­ topher with 16 points. Sixth place went to Gary Hawks with a very impressive showing. Kent Nogy and I had perfect scores and were leading the event going into the final round when we then met in the supposedly deciding race. Kent really put it on me good, turning times in the l:3 2 ’s. It was all for naught however, as we both had cuts. Kent had one cut, and trying to keep up the blistering pace, I had three!! So again, the fastest aircraft seldom win out overall; it’s consistency Officers of the Chicago Pylon Club, (I to r): Bruce Balko, Contest Coordinator . . .Frank that counts. .. enter Mr. Bertken! Morosky, President . . . and Bob Browning, Vice-President.

12 The MODEL BUILDER s

A few of the boys "getting themselves up for a race" (I to r): Coy Smith, George Jordan, Burnis Fields, and James "T ick" Johnson. set of rules and safety regulations, a printed specification sheet with tolerance ratings for the approved engines that may be used. Realizing that many modelers will not alter their engines in any way, there are also quite a few who will! This spec sheet would be a tool that the engine inspector at each race could use. O f course, then there is the problem of getting a workable spec sheet from the manufacturer. There are many problem areas here; the manufacturer must make a production type engine within a close tolerance rating, and the official specs must keep abreast of the factory m odifi­ cations and changes that arc occuring constantly. Secondly, what about the idle rule? Continued on page 46 Oh yes, once in a while they stop fooling around and get on w ith the flying down there in Florida! In fact, they've been flying QM's for about 2-1/2 years in the Jacksonville area.

Coy Smith took first in the QM races at Gateway R/C contest, April 8, 1973, Jacksonville.

The MODEL BUILDER 13 R/C Soaring editor's "Big Juan" had (radio interference) 12 foot span, 1060 sq. in., weighed 6 pounds (12.8 oz/sq. ft.), was fast clean, and efficient. Needed spoilers or flaps for landing. Airfoil was NACA 6412 at root, 6409 at mid-span and tip, 8 " root chord. „ SOARING Status ain't quo . . . ya know . . . The minds of R/C sailplane designers are festering all about us . . . big things are in the works if we can believe telltale trends. Hang on . . . 'Tis mind-blowing season.

φ Let’s just visit for awhile. an unfortunate sign of success. Happily, So what.’s next? Other than continued You know, the growth and advance­ however, the volume o f quality products growth and evolutionary progress in the ment of R/C soaring has been nothing is much greater than the number of same general directions, where do we go less than phenomenal . . . and it’s just questionable items. Most manufacturers from here? starting to roll. In less than five years, allied with the soaring movement are With the existing quantitative and this relative newcomer to R/C flying more interested in the long-haul health viable foundation of the R/C soaring has emerged from isolated local activity of the sport than in the proverbial sport, the next milestone must surely to a well identified, if not tightly fast buck. be qualitative . . . improvement of the organized, national thing. R/C soaring Competition we’ve got . .. and more breed. clubs . . . exclusively soaring . . . are we get each season. A few years ago, Whatever the endeavor, competition springing up like dandelions in the front 25 or 30 contestants represented a large dictates progress . . . and soaring compe­ lawn. Every place your neighbor looks. turnout. The 1970 LSF RC Soaring tition is fast demanding higher perfor­ The East Coast Soaring Society, foun­ Tournament set a national attendance mance, performance that can be provided ded in 1969, is still expanding at a rate record with 85 pilots. In the last couple only by sailplanes which are considerably unknown to other facets of the R/C of years, competition scenes on both more sophisticated than most of those sport. The Western Soaring Council, coasts, as well as the S.O.A.R. Nationals, flying today. The configuration of just starting its second year, provides have registered well over 100 fliers. The up-coming pacesetters must offer step liaison for 16 AMA chartered clubs and problem has become one of too many increments in efficiency, flight speed, has an affiliated membership o f almost participants. An equitable method of flexibility, and controlability. 1,000 soaring sportsmen. The League of entry limitation is sorely needed. A There always w ill be isolated contests Silent Flight ... an organization in which unique situation. limited to single task interests such as membership is earned by documented The AMA Provisional Rules for R/C pure duration or speed. But the AMA performance . . . has some 600 lifetime sailplanes have received national accep­ multi-task concept will prevail, and will members throughout the world and well tance and enthusiastic support by leading continue to be the basis for most signifi­ over 1,000 more enthusiasts working soaring clubs. These rules have been cant contests. Growth in competition towards that goal. utilized to develop competition programs program format will be toward seven The R/C soaring market place is attrac­ which demand exciting and challenging more demanding and divergent tasks ting serious commercial attention. The performance. Contest logisticand scoring rather than retrogression to specialization. variety of domestic and imported kits systems have been refined to workable A sample program for important and equipment can satisfy most any re­ patterns, and reliable and predictable contests in the future will be of familiar quest. Perhaps the real measure that launch devices ar now taken for granted. format. Multiple tasks w ill include soraing has “ arrived" is the appearance of So national interest and organization Precision Duration with Bonus Landing, over-advertised items of marginal quality are evident. Commercial support is a Precision Time with Spot Landing, Speed or design integrity. The word “ junk” fact. Competition guidelines, format and/or Distance. The average skill level might be used by the less tactful. It ’s and equipment exist in proven form. of soaring pilots w ill continue to rise, and

14 The MODEL BUILDER Contest Directors may be forced to specify more demanding performance for maximum task scores. Longer times may be required in Duration; reduced measurements might be imposed for landing points; and better relative per­ formance will undoubtedly be necessary for high scores in Speed or Distance. Should tightening of standards not come to pass, it’s a certainty that the overall winner of tomorrow’s large, m ulti­ task contest w ill have to overcome fierce competition. Pilot proficiency has al­ ready reached near-mystic levels, so all that’s left to separate the top few from the top also-rans is (a) luck and (b) sailplane efficiency. Since luck is a Jerry Nelson's big Ka-6E may have been ahead of its time, if today's apparent trends continue. very chancy thing . . . brilliant observa­ These ships weigh up to the FAI lim it of 11 pounds, some even more. VVhitey Pritchard photo. tion . . . the big difference must come from sailplane design. as cross-country lift hunting capability. increasing speed. What’s the trend ... what will be needed? Unless short-sighted, over-restrictiverules To optimize thermalling capability, Most surely, the next generation sail­ are imposed, the N-G-S will incorporate flaps on many N-G-S designs will be used plane (N-G-S)willbelarge ... considerably internal ballast that can be varied to to modify the wing airfoil section. This larger than the average 1973 model. This suit flight conditions and flight tasks. will allow in-flight aerodynamic trim will be due to three interrelated reasons: In-flight controlability will be a big adjustments necessary to convert from (1) size, at least to some extent, equates factor in the successful N-G-S. Designers a high-speed, cross-country, lift-hunting to efficiency . . . remember, a full-scale will specify ailerons or similar roll- configuration to a slow-flying, lift-using Cirrus and a melmac model Cirrus have inducing devices on these long-winged configuration. No single airfoil section about the same minimum sink rate . . . birds. This will permit small, lift-centering or pre-flight trim can successfully com­ (2) on-board equipment complexity/ circles with aerodynamically clean V- pete with the performance range poten­ weight will increase to provide additional dihedralled wings. It will also permit tial with this control feature. control mechanisms; and (3) larger, safer, low altitude maneuvers as well as Seen only rarely today, the N-G-S heavier ships are less sensitive to the plane-saving wing leveling on landing will probably utilize a radio-released two vulgarities of wind. Chances arc that approaches in bumpy air. hook. Tomorrow’s pilots will want to spans of around 12 feet w ill be quite The N-G-S will take advantage of lift lock on to the tow ring to alleviate any common, and weights hovering around spoilers or drag flaps for accurate rate- possibility of premature release during the 8 pound mark won’t be cause for of-sink control into small fields and maximum climb-out. O f necessity, launch raised eyebrows. onto precision touch-downs. Therelative- systems for the N-G-S will be more power­ Compared to today’s standards, the ly large, heavy and more efficient glider ful than most now in use. Most likely N-G-S will be heavy . . . in both all-up will demonstrate L /D ’s not common with the N-G-S standard winch w ill be com­ weight and wing loading. Efficiency current designs. Landing approaches will parable to current 12 vdc systems is the keynote and higher flying speeds be tedious indeed withoutsupplementary Continued on page 54 will be desired for penetration as well controls to increase rate-of-sink without AS-/VI7 Three-Views, next page.

Bob Crumley's 13-1/2 foot scale AS-W12 has rudder, elevator, ailer­ Paul Forrette's 12 foot original. Foam core wing, Eppler airfoil. ons, flaps, retract gear, tail 'chute. Disposable water ballast next!

The MODEL BUILDER 15 ~c

131 131 inches 19* 25 2 2 = in ft 1 Eppler 387* 49.5 in Model

FX-62K

65.65 ft 24.75 ft 27.2 48 Wortraann Wortraann

performance at low Reynolds number. 3-View furnished as by Astro Flight with its AS-W17 kits. Scale Length Aspect ratio Glide ratio Technical Data Sailplane Wingspan Airfoil * wing chord and airfoil changed to improve cz

The MODEL BUILDER As if in purposeful opposition to our R/C Soaring editor's comments this month, our glider designer offers a moderate size lightweight model for lazy soaring among the summer's weakest thermals.

φ ΐ ι has been said by a man wiser than most that every job is a self-portrait of the person who did it. Duane Hyer's Draggin’ Fly is three-dimensional proof o f that statement. The Draggin’ Fly obviously is the product o f mind and hands dedicated to the task. It is the product o f a modeler’s modeler . . . to use an over used phrase one more time. Flyer’s Draggin’ Fly, as a building project, may not appeal to those sports­ men who consider model construction a necessary chore... or to those who judge the merit of a kitted design by its degree of prefabrication. But for the Model Builder . . . the craftsman who enjoys fine woods, appreciates accurate struc­ tures, and recognizes the intrinsic value of workmanship, the Draggin’ Fly presents an opportunity not to be long denied. The Draggin’ Fly is a small sailplane by most standards. . . only seven feet in span and two pounds or so, give or take a couple of ounces, all up weight. Total wing area is a shade under 600 square inches . . . call it four square feet. Its primary purpose in life is fun-flying.. . drifting about in lazy circles on those The designer and the plane. Note the strong free flight influence in the construction of the wing Continued on page 50 and stab. Wing airfoil is HLG type; curved to the high point and then straight to the trailing edge.

The MODEL BUILDER 17 18 The MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 64

The MODEL BUILDER 19 This Corsair was one of many planes on static display at the American Cancer Fund exhibit put on by Orange County model clubs. Mile Square, Fountain Valley, California. RADIO CONTROL REPORT By FRANK SCHWARTZ Our world-traveling R/C Editor reports on the excitement, humor, and frustration of a trip to Hong Kong and then Japan. Naturally, he visited hobby shops, and the offices of R/C Technique in Tokyo.

0 l t was reported previously that I particularly interesting from my point more interesting was the information would write on some R/C activities in of view. I’m always curious to see what about equipment and planes. Seems the Orient. It was my good fortune kind of equipment and planes are flown that the German line o f kits by Graupmer to be able to travel to Hong Kong and elsewhere. and a wide variety of Japanese kits are Japan just a few days after the Toledo In Hong Kong, I learned that the sold there. Show. Although it had to do with flying field is about twenty miles from The particular shop I visited in Hong business, I was able to take time to visit the city and that most of the flyers are Kong docs a large mail order business all a hobby shop in Hong Kong. It was (more and more!) sport flyers. Even over that area, and I am afraid I didn’t

A popular part of that Cancer Fund exhibit was this opportunity to A true R/C nut! This piece of art was given to Dean Hart, Missoula, fly an R/C plane, using buddy-box system. Good idea for other clubs. Montana, by a non-modeling friend. Is that what we look like?

20 The MODEL BUILDER A portion of the static display put on by R/C clubs in Orange County, California, for the Cancer Fund Drive. sec too much U.S.A. material being sold. and put them in my engine collection. the street and name of the company or I suppose we are rather insulted in our They told me they had not gotten any building, in Japanese, on a piece of paper own little world of U.S.A., that is, and for about two years. Ah, well . . . so you can show it to the cab driver. it always is a jolt to find that there are Also saw a number of Helicopter Something told me to check first, other products in use elsewhere . . . other kits of the types and brands becoming and after having the hotel check at the than those we assume are universally familiar in the Slates, both Japanese and magazine offices, I learned that they used in other parts of the world. German manufactured. Seems helicopters had moved. The clerk had written down For example, I found that little, if are catching on everywhere. the new address and name of the building any, American made R/C gear is used. Once I got to Japan, I really felt the and that the people were expecting me. In fact, the most popular equipment in pinch of the devalued dollar. A couple Great! I jumped in a cab, handed him that area, and their largest seller, is of years ago I was able to buy goodies the piece of paper and settled down Futaba. Most U.S. modelers are familiar for R/C at real good prices. This time I for a ride. with this line as it has been sold in the found them to be as expensive as here On my last trip to Tokyo, my hair United States by MRC, and the particular in the U.S. and didn’t get much. George became slightly greyer over a couple of units sold here are to MRC’s specs. Aldrich had asked me to get some special taxi rides. It is laughingly said that most The equipment is held in high esteem, glow plugs for him . . . a hundred if they Tokyo taxi drivers are sons of Kamakaze and their new six channel transmitter weren’t over fifty cents each, American pilots and handle their cars the same is much like equipment you and I use. money. Surprise! They had plenty of way. It was quite true. I had some hair The case is the same old rectangular plugs but the price turned out to be about raising rides. Most amazing was the way box and the sticks look very much like a buck ninety! Forget the plugs. you got in the cab, handed the driver the those o f Kraft's. They have a very nice But I'm getting ahead of my story. written instructions, sat back and prayed. feather-soft ratchet feel on the trim I had asked the owner, publisher, The fellow shifted from neutral to first levers. That is, you can feel it rather than chief editor and main loafer o f this and took off. He didn’t shift into second having a floating trim lever as on all magazine to write ahead to the corres­ gear until the engine surpassed peak equipment made and sold in the U.S.A. ponding Japanese magazine, Radio Con­ RPM, then the same for second and third. Actually, I wish some American manu­ trol Technique, and tell them I would Wild! This trip was somewhat different facturer would try these ratcheted trim pay them a visit and perhaps write about as I luckily got a gentle middle-aged levers. I liked them. Futaba makes a my visit. gent who drove quite sanely. He even wide variety of transmitter and servo So, armed with the Editor’s card pointed out the building I wanted and let styles, but this one was new and closely (of the Japanese magazine), I decided to me o ff across the street. resembled the popular U.S.A. styles. take a taxi over to their offices in Tokyo. Well, there I was. I went inside and Engines were mostly O.S. and Enya, This is much easier said than done. realized that I didn’t know where to go as well as Webra and FI.P. Prices were In Hong Kong, since it is owned by the next. I started up the stairs. By the good . .. much lower than in the States. British, all street signs are in English. third floor I knew I didn’t know where The devalued U.S. dollar still makes a Not so in Japan. Everything . .. that is I was going so I said “ Radio Control?” good purchase in Hong Kong... although about 99 and 44/100 percent . . . is in to a young man who came out o f one of it is not as good as it used to be. Much Japanese. Safest way to leave the hotel the office doors. He smiled and pointed to my disappointment I was unable to is to have the desk clerk write in J apanese in to where he had just come from and buy any Chinese diesels for my collec­ the name of your Hotel, and the address, there I was! tion. A few years ago, when I was there, so you can get back. Best way to get I had had some cards made with my I picked up some beauties dirt cheap somewhere is to have the desk clerk write Continued on page 52

The MODEL BUILDER 21 WOW!! Get a load of the beautiful ......

TWELFTH INTERNATIONAL CONTEST

OF THE ASOCIACION MEXIČANA DE RADIO CONTROL

Our resident Mexican reporter, Eloy Marez, explains in words and pictures why we should all pick up our gear and fly "South of The Border." . . trophy by Orbit! Miss Beatriz Luna, Mexičana Airlines stewardess.

® T h e Asociacion Mexičana de Radio dous feasts, gallons of Margaritas, that Yours Truly (2nd), and Ernesto Jiminez Control, o f Mexico City, hosted their incomparable Mexican hospitality, and (3rd). Twelfth InternationalContest, April 19th to us visitors from the States . . . just Then, the real fun begins, because to through the 22nd, in that city. The fresh from the meat boycott . . . steaks the Mexican aficionado, RC flying means contest site was the club flying field, just a silly millimeter smaller than quar­ RACING. Except for the Open Pylon known as ’Paraiso’ (Paradise), about ter beefs! race, which had the largest number of forty five minutes from the 'Zona Rosa’, The contest started on Thursday, the entrants, Formula One drew the most the fabulous Pink Zone of Mexico City. 19th, with the first event being the contestants. By the end o f the first This is the ‘in’ part o f town, where most glider competition. When all the ther­ round, it became evident that it was a two of the best hotels, shops, restaurants, and mals had settled, the first through third man race, between Salo Feiner of U.S. model flyers are located. places for Precision had been taken by Mexico City, and Bob Root, of Bellevue, The scheduled events consisted of Col. Robert Thacker of San Clemente, Washington. The rest of the pack was gliders (precision and speed), FAI Pattern California, and Roberto Guzman and there merely to make things more exci­ (Expert, Intermediate and Novice), and Manuel Lewinsohn, both of Mexico ting for the spectators. Racing. The unscheduled events included City, in that order. Places for glider It finally resolved itself to a fly-off sun burns (or at least sun tans), tremen­ Speed went to Franco Clavello (1st), between Salo’s Little Mike and Bob’s Loving’s Love. Everything else being equal, points and all, the first take o ff was to be decided by the toss of a peso, which Salo graciously declined, insisting that Bob was a guest and must take o ff first. The fly-off was a perfect example of racing at its best; a pretty even match of machines and pilots, with a constantly changing lead, beautiful flying by all concerned, and a last second smile from Lady Luck on Bob Root who emerged winner and hero o f the day. Another interesting thing about this race was that both finalists used gals for callers. Salo is always ably assisted by his teenage daughter, Rita, and Bob’s mechanic, caller and Jill-of-all-trades is is charming wife, Kathy. The latter couple became a favorite with the local Formula I flyoff in Mexico was between Salo Fiener (left) of Mexico, and Bob Root, Bellevue, Washington, US. Bob's Loving Love was the winner. flyers and general public in short order.

22 The MODEL BUILDER The 'Ciclon' Open Trophy, held by Misses Teru and Marta Garcia.

Not only did they come from a part of Benjamin Castaneda, 1st in Pattern Expert and the world that many Mexicans associate Lola Aguilar. He's son of Luis Castaneda. with polar bears, Eskimos, and air con­ flight. In the Expert Class, and possibly Bob Root being interviewed by Alejandro ditioning direct from the North Pole, inspired by the Woodcraft props donated Crespo, for Mexican TV. but they are enthusiastic modelers and as trophies by O rbit Electronics, the enough, Mexičana sent along one of its wonderful people. Bob’s airplanes are Flying Castanedas, Benjamin and Luis hostesses, Miss Beatriz Luna, to present different from the usual types, being (Son and Father) of Puebla, emerged as the “ goodies” and to give the lucky well constructed, and beautifully and First and Third place winners, respectively. winners a big hug. distinctively finished. He is also the The Second place winner was Feliciano On the subject of trophies, the winners designer o f the Firecracker FAI bird, Prat. of the Glider and Formula One events kitted by Fliteglass. By the end of the First Places only were awarded to were presented beautiful silver candy first day, he had been re-christened into winners in Intermediate and Novice FAI dishes and “ sombreros” , suitably en­ the Spanish equivalent of his name: pattern flying. These spots were won by graved, donated by the Secretariat of Roberto Raiz, pronounced Rah-eez. Oscar Ponce (Intermediate), and Francis­ Communicationsand Transportation, the The next two days, Friday and Saturday, co ‘Paco’ Gonzales (Novice). They were Mexican Government equivalent of the were devoted to FAI Pattern flying. awarded some of the beautiful Mexičana Federal Aviation Agency. Can’t help The number of entries was somewhat Airlines trophies previously seen at other but wonder what the reaction would be less than that seen at other contests in contests in Mexico. In addition, they, from one of our governmental agencies Mexico, but since most of the country’s along with Benjamin Castaneda, for his if they were asked for trophies for one top flyers were there, it was close, and First Place in the Expert Class, were of our “ toy airplane” events? the results were in doubt ’till the last awarded Round trip tickets on any The fourth and last day, Sunday, Mexičana flight to any place serviced dawned clear, calm and cool; a good by that airline. And if that wasn’t day for the races. In this case, FAI (in Mexico pronounced so as to rhyme Continued on page 48

Col. Bob Thacker, with 1st place winning Manuel Sierra was winner of FAI Pylon. (I've written 5 different captions and can't Cumulus. Elizabeth Mathelin holds Tx. N ot swiss cheese wheels. print any of 'em. Please be my guest!)

The MODEL BUILDER 23 FULL SIZE PLANS AVAILABLE - 64 PAGE SEE

The MODEL BUILDER Vernon Boehle (pronounced "Bailey") entered this 15 foot span. Baby Cyclone powered model in the Texaco event at the 1936 Nationals. p m SPARKS By JACK TRANSUE

ORIGINAL TEXACO PHOTOS BY TOM LAURIE

Ø T a k c a len foot span Nimbus, a few event was held from dawn until 10:00 the 1935,1936, and 1937 Nationals. ounces o f fuel, and a thirty minute AM and was called the Dawn Patrol. ‘‘The models that had been entered chase, roll them together and what have For those who may never have heard were weighed, and a fuel mix of gas you got? The Texaco Event. . . of the Texaco Trophy, we asked Sal and oil was allotted according to the total This is one of the oldest, and truly Taibi for a brief history of the event weight of the model at the rate o f A the most beautiful of the Old Time from its beginning up to the present ounce of fuel for each pound of model events. On April 1, 1973, we traveled time. weight. A seven pound model would to Taft California to participate in the ‘‘This contest was originally sponsored receive 1 % ounce of fuel. Many modelers SCAMPS (Southern California Antique by Texaco, the company that refines and leaded their models so they could get Model Plane Society) annual Texaco and sells gasoline under the trade name of themaximumfuelallotment of 1%ounce. Old Ruler contest. This year, the Texaco Texaco. The event was run as part of ‘‘Engine runs varied according to power

O.T. MODEL of the MONTH - The ALBATROSS, designed by George Reich

The Albatross was originally published in AIR TRAILS magazine . . . A pril 1941 issue. George Reich may be better known for his designs and accomplishments in Wakefield, but in our estimation, this is one of the most beautifully proportioned gas models of all tim e. The original Albatross used a Dennymite engine (ignition, of course). However, it was suggested by the designer that the lift­ ing stab thickness be increased to about 13/16" if a more powerful engine, such as an Ohlsson 60, is used. (George felt that a lifting tail of proper thickness would elim­ inate the need for downthrust.)

The MODEL BUILDER 25 FULL SIZE PLANS AVAILABLE - 64 PAGE SEE

26 The MODEL BUILDER Chuck Partch and his beautiful 10 ft. Nimbus, a Shereshaw design, C liff Silva, SKIF's, won the revived 1972 Texaco meet with this mod­ won in 1970 and 1973. Hez half of P & w with Gene Wallock. el of Frank Ehling's 1938 Texaco winner. C liffs time, 78-1/2 minutes.

Jim Adams (rt) receives new reproduction of Texaco Trophy (donated by K & B) from Sal Taibi for his win in 1969 with 8 foot K-G. setting and the size of prop used. With ideal model for the Texaco event but it run a contest using the Texaco event a 16 inch prop and the engine set never won. SCAMPS member Hugo rules. K&B Mfg. of Downey, California, at SA power, a Brown )r. engine would Lung built the Boehle 15 Footer in 1968 generously agreed to pay for a four probably run about I0 to 12 minutes and powered it with a Super Cyclone, but foot high reproduction of the original with 13A ounces of fuel. Baby Cyclone Hugo was no luckier than Boehle, always Texaco trophy, duplicated from old with the same fuel allotment would close but never a winner. photos. A preliminary contest was run probably run 20 minutes. The Texaco event was discontinued which was called the Texaco Trials. The The largest model ever built for this after 1937 in favor of the limited engine purpose of this contest was to evaluate event was Vernon Boehle’s (pronounced run of 40 seconds, which as performance the planes and the D-T systems. Every­ “ Bailey” ) 15 footer. Vernon had a large increased, hasbeen reduced to the present thing went well and the first meet was model for good visibility, and powered engine run of 11 seconds at the Nationals scheduled for April 1967. The contest it with a Baby Cyclone for a long Free Flight gas events. was a huge success . . . all the participants engine run. It should have been an "In 1966, the SCAMPS decided to Continued on page 58

Look at the beautiful lines on this 1936 Texaco entry designed and built by Leo Weiss. Dig the Another photo of Boehle and his 15 footer. Cessna-type gear! Also, whatever happened to knickers? Maybe Arnie Palmer can bring 'em back. Both appear to have about the same dihedral!

The MODEL BUILDER 27 0 O n e of the most exciting and compe­ titive classes in the American Model Yachting Association is the 50-800 Class. There have been over 200 of this class registered with the Association. The basic requirements are an over-all length of 50 inches plus or minus Ά inch, and a sail area not to exceed 800 sqaure inches. There are a few minor limitations on the amount of roach (curve on the trailing edge of the sail), battens not to exceed 2” (stiffeners in the sail), and a jib stay height o f 80%. There are several kits on the market, and also many scratch built models. The size makes them better all weather boats than the 36-600’s discussed last month. But cost increaseswith size. Nevertheless, it is now possible to travel just about anywhere in the U.S. and find a 50-800 that can be raced. While R/C yachting is still just beginning, this is the class in which you will find the most compe­ tition. The Class was started in Marblehead, Mass., by Roy Clough, when free-sailing was very active. The English, in their quest for a good handling, portable free-sailor designated them as Class "M ", for Marbleheads, and have had much success with them. It is also the largest class among the free-sailing groups. When the boats became a class in the AMYA, they were re-named 50-800 to avoid confusion between R/C and freesailing. The basic rules for the two types are the same. The past three years have seen the 50-800 grow from the fourth largest class to its present leadership. There seems to be no end in sight for this domination in class membership. There are several reasons for it, besides its good sailing characteristics; availability of good kits, many plans,and portability. The Annual Class Championship The very popular Soling 50-800 manufactured by Vortex Model Engineering. Over 200 have for the 50-800's will be held in San been registered w ith the American Model Yachting Association (AMYA). Diego on August 18 and 19 this year. The competition has been tough in the last two Championship Regattas, and we see no reason for that not being the case for the coming regatta. main sheet In 1971, two of us from San Diego By DON PROUGH traveled to Denver to attend the First 50-800 Championships. Kirk Kuykendall past and present Class Secretaries were 22 with 67 model yachts entered. The and I enjoyed the hospitality of the there. The weather was light and lighter. largest entry Class was the 50-800's, Denver Club. The racing was good and Again the California group managed to with 21 competitors. I managed to the wind went from 0 to 35 mph during stake its claim on the title and John sneak by Andy Littlejohn Sr.’s Boomer the two days. When the results were in, Converse, of Vortex, took home the (his own design) and Alvin Smith’s I managed to take first with a Soling Championship. Soling for a first place. protype from Vortex, with six wins in If the Spring Sail Regatta hosted by The 36-600’s put on a good show, seven races. My only loss was to Scottie the San Diego Argonauts is any indi­ with 20 skippers fighting it down to the Shroff, sailing a Phoenix. Fie produces cation then the upcomingChampionships wire. Bill Barton with “Equation", the boat that Ray Hottinger designed. should be a real test for the skippers. was first, second and third went to Bob The Second Class Championship was The largest Sail Regatta for R/C DeBow (Starlet) and Chuck Black held in Memphis, Tenn., and both the took place in San Diego on April 21 and Continued on page 49

28 The MODEL BUILDER Peanut Scale Kirby Cadet glider w ith 11-3/8" A LITTLE AVIATION PHILOSOPHY Wright Brothers type. span by Ken Simpson. Duplicate was inhaled by exhaust fan during indoor flight! "No bird soars too high if he soars FINGER LICKIN’ GOOD with his own wings.” Blake, (submitted Nothing more annoying than having his blimp models. Bigge also currently by ) .D. Gillies, Scotland). rubber lube all over one's hands, unless holds the world record for largest total Juan de la Cierva, o f Spain, was the it is having glo fuel and exhaust residue numberof kitesin the air at the same time. inventor of the autogiro, and also quite all over one’s hands! Try using the He accomplished that feat with a fleet a sage, as can be seen from the following: inexpensive "Wash ‘n D ri” packaged o f exceedingly small flexible plastic "We find new things by looking for them. "towlettes” . Some of the fried chicken creations. Most of us are too incurious, too self- emporiums give them away at no extra Here in the West Coast, Bill Watson distrustlul or too content with things charge with meals. The type we use here was pursuing a similar sort of objective as they are to make the e ffo rt" at the hangar, after wiping down the ‘ole by SLOPE SOARING in the Santa Ana Which sort o f lines up with the Nieuport, measure only 2 x 3/4 inches blimp hangar! Bill acheived this para­ thoughts of another great inventor, and in the package, yet unfold to 5Ά x 8. doxical distinction with an Escondido autogiro enthusiast, Thomas Edison, who They arc impregnated with some sort Mosquito which had been converted to a said: "There is no expedient to which of liquid soap that docs a good job of glider by replacing its prop with clay a man will not resort in order to avoid cutting through grease, etc. Everyone gallast. By moving a large cardboard the real labor of thinking.” should keep a few in their field kits. box lid at exactly the right angle, Henri Rousseau (1844-1910) was fa­ KITE TALES speed,and distance underneath the model, mous for his landscape paintings, but Offhand, one might expect that it Bill was able to sustain flights o f about was evidently something of an aero buff would always be windy in Washington, one minute duration. The only real too. In a recent art collection brought D.C., what with all the hot air in that limitation, in fact, seemed to be the from Russia, appeared a painting by vicinity . . . however, during a recent endurance of the operator. Rousseau entitled "Zeppelins", which kite contest there, the only flier to Bill also flew a model so tiny, that features a spherical balloon, an early successfully keep his entry aloft all he was able to wind its sock-elastic dirigible, and an aircraft resembling a afternoon was Bill Bigge, well known lor Continued on page 50

Stan Fink’s one-man Peanut Scale winding rig is simply made from Geared drive for rubber-powered models is new offering from Crow an old shoe box. Details in text. H ill Models. Good for short fuselage and keeping CG forward.

The MODEL BUILDER 29 FUDO TAKAGI PHOTO

You'd think a modeler had called the shots on this one since it has such nice free-flight proportions. FH wheels are almost standard these days!

This month we have expanded WALT MOONEY's department to include the PEANUT GALLERY, so that we may publish pictures of Peanuts built by some of our readers. This month's feature, the HUNTINGTON H-12, is another two-in-one model; the peanut on the next two pages, or the 19" span model from Plans Service.

^ T h is is a model of one ol the first stronger and heavier, so the plans were wood or spruce if desired. These are the homebuilt airplanes in the U.S.A. Not drawn this way. One side benefit from part of the airplane that must survive that all the first airplanes weren't really this modification is that a block nose as the hardest knocks. The wing tips and built at home, but this was designed after shown iseasier than bending the longerons the tail outlines were laminated. Use WWI and was actually intended to be for the former built-up front end. .012 by I/32nd basswood. Three layers built by amateurs. It used a two cylinder Construction of this model is as simple were used around the tail and five layers " V ” type engine, undoubtedly out of as a little box fuselage monoplane can be. were used for the wing tips. a motorcycle. It was truly an attempt Try to keep the model as light as possible If you are a regular reader of this to obtain an airplane for a minimum while still retaining adequate strength. magazine you’ve read Fernando Ramos’ first cost. Most of the balsa should be medium for articles extolling the virtues of the thin As a consequence of this effort it was the sticks. The leading edges of the basswood strips that are available at built very simply and therefore makes wings should be hard balsa or even bass model railroad supply stores. A ll I can a simple model. We have once again designed the model in a larger size, but in a format that w ill be reduced in the magazine to a full size PEANUT SCALE plan. You are therefore free to build a peanut Huntington H -I2 from the maga­ zine plans, or for a nominal price, you can purchase larger plans from the Model Builder Plan Service. Both sizes of the Huntington have been built and both fly well. However, it would be dishonest to claim that the model wasn’t tailheavy. Before it would perform a stable flight pattern it had to be ballasted to the CG shown on the plans and in addition, it was necessary to add the up elevator shown in phantom on the plans and in the photos. With these adjustments it was obvious that the Beautiful little 13" span Boulton & Paul P-9, by Maj- E.F. Heyn(Ret). Wheels were heat- nose of the model could have been made formed from acetate sheet. Power is a loop of 4mm Filati rubber.

30 The MODEL BUILDER coats of dope around the edges prior to water shrinking. This takes a lot of time; considering that the process has to be repeated for each structure. So you can see why I prefer the first covering method mentioned. Just for the heck of it, I timed myself to see how long it would take for me to cover and dope the Shark. Cover­ ing took about 30 minutes, alcohol shrinking about 15 minutes (each wing panel was done separately), and doping about another 15 minutes. Doping was also discussed by Walt Mooney, so I ’ll pass over this for now. With all parts covered and doped, the Shark was assembled. In place of the machine carved prop that is furnished in the kit, I used a plastic prop of larger diameter. Both the prop and the thrust button were reamed to accommodate an aluminum bushing. This is to eliminate any slop in the prop hook or prop. A great deal of efficiency is lost if the prop is not running true. It is better to have metal to metal or metal to plastic rather than metal to wood . . . friction prevents good performance. I also use a teflon washer between the prop and a thrust washer to eliminate friction. A couple of drops of light oil on this whole assembly is recommended. Making up the rubber motor is next. I personally like using SIG contest rubber. It is very consistent and can take lots of turns without the usual fear of breaking at the wrong time. For a Photo by Tom Hoyt shows Ken Johnson launching his Jumbo Scale (48" and over in span) Gee Bee "D ." Erie Model Aircraft Association, Erie, Pennsylvania. model the size and weight of the Shark, 1/8 inch, or 2mm rubber w ill do the job. it dries, it will be quite taut. Coat the order to accomodate several structures, A question here might be, how long outer edges of a framework, such as a otherwise you waste time and tissue. should you make the motor loop? rudder or stab, and place it directly on The traditional method of covering The way I start out is to make the loop(s) the tissue. As soon as the glue has dried is to brush several coats of dope on the 25 percent longer than the distance cut around the framework and repeat framework. Tissue is then applied by between the prop shaft hook and motor process for the other side. Obviously, applying thinner over the tissue, which peg. I moisten the ends of the rubber a drawback to this method is that you softens the dope, permitting the tissue in my mouth (This may cause your have to have various sizes of frames in to adhere. This is followed by several Continued on page 53

The Shark glides in after a test flight, prop free-wheeling. Model is One of Fernando's public school students, Steve Martlaro, demon- an excellent trainer for the beginning modeler, both in building tech- strates proper launching technique. With winder wound motor, you niques and flying adjustments. better be ready for a chase in the event a thermal happens along!

The MODEL BUILDER 35 Bill Purtell winds his Unlimited model, Stan Colson holding, Mrs. Purtell in middle. Ship has won most every Unlim. event on East Coast for years.

By RON EVANS

φ Two recent decisions which directly weekend, 1974. winds that caused so much trouble at affect FF’ers were published as this is In addition to the Finals site change, the last two Finals, but I doubt if the being written; one, to hold the U.S. the Semi's flying process is new (15 thermal conditions will be drastically Nationals at Oshkosh, Wise., August rounds in 3 days in each event, instead different from normal . . . normal for 1-6. 1973, and the other, to hold the U.S. of 8 rounds per event, all flown in one Taft, that is. Making the Team on the F.A.I. Finals at a non-central single site, day, one day per event) and the Finals basis of 5 flights at Taft may provide an most likely Taft, on the Labor Day will be flown in the manner of past easier time with retrieval, but whether it Semi's, but with only 5 flights per day, will attually result in a team better to select a team member. Each day’s qualified to compete in an European flying then yields one team member World Champs is open to question. in each event. Both of these changes And in all fairness to the Easterners who can be considered quite substantial, and must cross the U.S. to compete, it for the FAI at least, quite controversial. seems logical that any Finals at Taft As far as a non-Navy Nats goes, this should be countered by a subsequent writer is fairly certain it w ill result in a Finals in the East, right? . . .Wrong! No better all-around contest. The site is such proposal has been heard, nor is it larger than the Glenview N.A.S. which likely to be put forth. Anyone having has hosted the Nats since 1970, and site opinions on this subject is invited to size is o f great importance to competing submit them to Model Builder, but FF’ers . . . and the A.M.A. will have bear in mind that this is a family more latitude by not having to depend magazine. (And since Ron is a member upon the Navy for any “ favors". It of the family, submit opinions directly will place a greater burden upon the to him ! Address appears later. — WCN). Nats administration, but this has clearly SAM-5 A/2 AIRFOIL . . . Part 2. been the case with even the last few Since writing the SAM-5 article (July Navy-hosted Nats. ‘72 Model Builder) I have continued The result of the new F.A.I. program trials with different wing sections. This docs not get my approval quite so easily was not a result of any particular dissatis­ (for whatever that is w orth!). Since the faction with the GF-6 section shown on first “ Central” F.A.I. Finals, fliers have the drawings; just the hope that there questioned the validity of selecting our might be an airfoil a little bit better, Team in the windy and/or strong thermal somewhere. As mentioned in the text conditions typical of the Central U.S., at the time, the CH 407 has potential, The last 2 Finals at Albuquerque, New and in fact turned out as well as the Mexico and Caddo Mills, Texas, did much best o f my F 6’s.

Ken Oliver launching his FAI Power model. to add fuel to this argument. Moving The model I used at the Caddo Mills The ballet should have such form ! the Finals to Taft may indeed calm the Team Finals sported an aluminum nose,

36 The MODEL BUILDER You can hardly find Bruce Hannah's field box in this photo, it's so Sam Stallard. Montreal, Canada, with his “ Lively Lady" at the “ Great cleverly camouflaged! Box houses fuel, stater, etc. Grape Gathering" contest near Quebec. Prizes were bottles of wine! sub-rudder (never again!) and theCH 407 Champs or U.S. Nationals, but the slides wing section. Everything else was per never go past the next club meeting. How plan, including wing and slab construc­ about a national swap? If you like the tion. In the event that you arc looking idea, and/or have si ides to trade (tempor­ for something a little bit different for arily), contact this writer at 83 Blake St., your new Nordic, coordinates are en­ New Haven, Conn., 0651 I. closed. Other wing sections you might TRACK SHOES consider; the Drew ‘‘Lively Lady” airfoil, Vic Nippcrt once wore a pedometer the B 6356 B (with string lurbulator), (human mileage indicator) to a typical the Thomann F-4, or the B 6456 F. Galeville trim session, and found he SLIDE SWAP logged better than 10 miles on foot in Most clubs have a pretty good backlog one day. Arc your feet trying to tell of contest slides, dragged out at the you something? With the walking and banquet or when attendance is lagging. running that is so much a part of free Did you ever slop to think that what is flight, it will pay for you to look into a “ old hat” to you might be of great good pair of track shoes. Two welI- interest tosome other club? For example known brands that this writer can vouch not one member of my club (SCAMA) for are “ Adidas” and “ Pumas” . Adidas has ever seen a Class D gas job, other may ring a bell; about 90 percent of the than magazine photos, but at a Southern World's Olympic track men and women Cal meeting it wouldn’t be a real atten­ use them. A pair of either Adidas tion grabber. Get the picture? (That is (model “ Rom” ) or Pumas (Model no. a bad pun!) Also a few clubs have 163) will set you back between $15 and members who attend contests of great $20, and they arc worth every penny. Our F/F Editor, Ron Evans, with SAM 8 , at Galeville record trials. Where's your “ Typical interest, such as Free Flight World Con tinued on page 50 Group", Ron?

ST A. 0 1.25 2.50 5.00 7.50 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 60.0 70.0 80.0 90.0 95.0 100.

UPR. - 3 .4 6 4 .4 6 5 .5 4 6 .7 4 7 .4 0 8 .3 4 9 .0 0 9 .4 0 9 .6 0 9 .6 6 9 .6 0 9 .4 6 9 .2 0 8 .3 4 7 .2 0 5 .6 6 3 .0 0 2.20 0 .5 0

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Coordinates for CH 407 Airfoil

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The MODEL BUILDER Focke-Wulf 190 control-line model by Mike Fulmer features sliding canopy, functional access doors, even a scale auxiliary starting unit! f~ONTROL-LINE By DICK MATHIS and DALE KIRN

# This month, I have a sketch o f our ends up a foot away from the wing, is not so fast as in regular combat, where latest slow combat, which works OK. making the airplane hopelessly nose- you’ve had a long match if you’re both You can build one from the info given heavy. I think too much emphasis is in the air more than 30 seconds without on the drawing, with a little ad-libbing put on attacking ability and not enough colliding, crashing, or tangling lines. of your own, and have about as snappy on simple stuff like defensive flying .. . Second, a novice has a better shot at a slow combat as anybody. The impor­ and merely remaining airborne. breaking in successfully at slow combat. tant thing is having the shortest nose COMBAT THOUGHTS Third, the technology of theairplane and possible for better turning plus having a The first combat meet in the Dallas motor is not as advanced as in fast long enough tail moment and big enough (Snider Swamp) area transpired last combat. Fourth, the slow combat air­ tail for the same reason. Light weight weekend. It was supposed to be a small plane is more pleasant to play around isn't as important as strength in crashes, “ fun” thing where everybody, beginners with, than a hot fast one, on Sunday so don’t spare the epoxy and glass cloth. and pro alike, could get his jollies w ith­ afternoons when there is no contest. . . Next, we’re developing a slow combat out being too serious. To the organizing in other words, it ’s more o f a dual- design to eliminate the two quickest club's amazement, it came to pass that purpose thing. ways to lose a match: The easiest ways it was a little more hot and heavy than Don’t get the impression slow combat to lose are to crash and not be able that. The slow combat event was most is dull, however. A t the above mentioned to continue because the wing is shredded, popular and most spectacular. If this contest, we saw virtually every kind of and, second, to run out of gas, and lose is a trend, we’d better come up with crash, fly-away, collision and cut that on air time. The answer, we hope, is a some rules quick so kit manufacturers you could dream up, but at least, since thin, solid balsa elliptical wing, and a can get with it and we can all have designs they happened slower, the spectator and 4 to 5 minute tank, instead of the stock that will be legal when we go to out o f flyer could see what actually happened. tanks which arc good for 2 Ά to 3 town meets. The difference in speed between slow and minutes. The tank will have to be Slow combat is a pretty good thing fast combat must be 25-40 mph, and that specially made to give that much capa­ for several reasons: First, you get more is important. city, yet not be so long that the motor combat flying per match, since the pace Continued on page 52

Which head has the 1973 Cox Tee Dee .049/.051 ? The one on the Proper way to remove Cox cylinder. DON’T stick wrench in exhaust right, but don’t go by part numbers . . they're the same! See text. slots or your piston will end up looking like a splined axle end!

The MODEL BUILDER 39 The MODEL BUILDER A Fox (not Duke) car, the author's 1234 custom, and an old McCoy spur car (I to r( wait in line at W hittier Narrows track. TETHERED RACERS! By TED MACIAG . . . The T—Cars are still at it, and once again growing in popularity. Dooling engines are finding a firm challenge after all these years from the Italian OPS. Keep an eye on them.

^ T h is is shaping up to be the year of speeds of 100-1 10 MPH being a good run. ihc Dooling versus the OPS. The OPS The OPS looks like the wave of the engine is already making its mark in the future . . . if we don’t run into parts model racingworld with several European problems and monthly model changes as car and airplane records. Last fall, an with other Italian engines. OPS powered custom car owned by Heading up the old guard with the Franny Wolf broke the world cold Dooling powered cars are Lloyd and Roy fuel record with a speed of 155 MPH, Torrey who swap the “ all o u t” custom but the record was protested because ol class record between themselves. It is problems in calibrating the timer. How­ only natural that they and some other top ever, there is little doubt that the car is contenders should prefer the Doolings capable of that speed and even more. since they are still winning with them, Phil McDonald put an OPS in his already but the newer people with the OPS cars fast custom car and turned a 158, which are hot on their heels. is just a fraction o ff the track record at As with full scale racing, increases ■rr» Anderson, Indiana. Phil used some of in power must soon be followed by his super hot fuel for his run. improvements in cars and tires, since Cris Lupo whips cable to help car get started, The race car people still have a lot to added horsepower does no good if you then jumps on platform until run is finished. learn about pipes. Once these and the can’t get it to the ground. The tires wheels are great for speed plane dollys, tire problems are solved you can look that we are using now were designed so if you have any in the darker corners for a large increase in speeds. The OPS over twenty years ago and are going to of your workshop, don’t throw them engines are also finding their way into have to be improved in the speeds are away. other classes of cars, such as the Dooling going to take the large jump that the MONTHLY RACES Arrow, for running in the Class II or increased horsepower allows. European The regular races at Whittier Narrows manufactured class. Jim Pattee has put tires and wheels are being tried as a in California are now having a turnout one into an old Papina car for running possible answer but I feel that a whole equal to the yearly national races only in Class IV. When he gets the fuel new approach is going to be needed. With a few years ago. There is experimentation problems sorted out, and if the antique all the new modern materials being with new ideas and refinement of the car holds together, it should challenge developed it isonly a matter of time until older cars which is evidence of the the Arrows with speeds in the I40’s. better tires are found. They will work revived interest in what is considered by Only a few years ago the Class IV cars until more power is found and then the participants as the most sophisticated were considered the "dog” class with cycle will begin again. The old tires and of all the branches of modeling.

The MODEL BUILDER 41 to work on have kept down the speeds for this type o f car. There was a lot of talk at the track about buildingsmaller. 15 and .29 powered cars to compete with the Europeans in the upcoming 1974 World meet. Ed Bayneshasa.29 car and Jerry KMpnknight is starting on one to be powered by the new K&B 15. These smaller cars should become more popular because of the lesser cost and the availability of some really hot engines. FLYWHEELS To a lot o f people running boats and cars, flywheels are just a convenient place to wrap a starting cord or mount a gear. Actually, the flywheel has a very impor­ tant place in the drive train from the & ■ · '■ crankshaft to whatever is powering the Franny Wolf (Franny's Chrome) and his trophy winning OPS powered car. The OPS is making craft; be it wheels, marine screws or its way into many phases of the racing hobby. helicopter rotors. When an engine is running, the power is produced only during a small portion of the rotation of the crankshaft, the rest of the time something must carry the working parts around for the next power stroke. You might say that the horsepower is stored in the mass of the spinning flywheel until the next power portion occurs. The flywheel should always be mounted on the crankshaft and not on the driven gear or after a universal. When the gears are operated the ragged edge of destruction, as our car gears are, they would never hold together under the C ontinued on page 51

"M y Daddy smokes OPS’s!" Jim Pattee and his OPS powered Papina. R/C Pylon folk should drop by and take a sniff at the fuel some of these T ear guys are running in their engines.

Because of the recent increases in Dooling powered custom car, a wrist speeds and the trend toward heavier pin pad was pulled out of its usual cars, the cable size has been raised from position and sucked through the transfer .051 to .059. This is the size of landing port, destroying the beautiful split ring gears on smaller U-control planes! The piston. This piston had two half thick­ increase drag o f the cable slowed the ness rings in each groove which may not cars down, with everyone losing 3 to 5 have helped the speed but gave a great miles per hour from their usual speed. psychological advantage. The OPS However, I feel that this will be only a powered Arrow shredded out the gears temporary loss and the speeds will soon on a slow break-in run, so there is a lot be climbing again. The discussion now of car work ahead for us. is whether to have a light car and let Ralph Flaaten ran his old McCoy the heavy cable bow back during a run spur car. These flat, rather strange to shorten the radius of the track, or to looking cars are front wheel drive, and use a heavy car and hope that the cable if running properly have only the inside won’t affect it as much. front wheel touching the track. This In the February race at Whittier was thought at one time to be the most Narrows, disaster struck both of the efficient system, but losses in the drive Garold Frymire checks a tire on his own cars that we brought to run. On the train and the fact that they are hard design custom car. Note air intakes.

42 The MODEL BUILDER ®Modelcrs spend a great deal o f time designing, building, and trimming models which, when flown properly, will stay in the air for the maximum time. They drive hundreds o f miles annually in order to fly their creations in competition. There are many good models and the flyers who win are usually the ones who can avoid losing. That is, the compe­ titor who can fly all day without making costly mistakes will generally be suc­ cessful. The value of a high level o f physical fitness for Nordic and hand launch glid­ er flyers is obvious. However, flyers in other events might also do well to con­ sider their physical condition. It can be very rigorous to fly in a model airplane contest. Fatigue takes the pleasure out of flying, and adversely affects physical performance. When one is tired, it is difficult to concentrate, attention span tends to be shortened, and mistakes are more likely to be made. In short, a fatigued flyer is likely to make the dreaded “ bad flight” . Good planning can help to eliminate "For an old timer, he runs great!' fatigue. Get plenty of rest during the week preceding the contest and espe­ cially the night before. If it’s necessary PHYSICAL FITNESS FOR MODEL BUILDERS to drive a long distance to the flying site, arrange for suitable accomodations By Bob Isaacson before leaving. Some flyers can do just fine sleeping in their cars, while others Building a model to win is only half the game. If you aren't in physical need the convenience o f a motel room shape to properly launch, chase, and retrieve that F/F bird you're not in order to get adequate rest. giving it . . . and you, the chance you both deserve. Be prepared. The average person is not active normal for extended periods of time. 8. Pick activities which are interes­ enough in his daily living to maintain Activities include jogging, running in ting or fun. Some people find it very an acceptable level of physical fitness. place, swimming, bike riding, and vig­ challenging and relaxing to go out alone Therefore, he is likely to tire more easily orous games such as badminton, hand­ to jog three miles. Others hate to do during a contest. If this is the case, it is ball, and tennis. Calisthenics, weight anything unless it is a game. advisable to plan a daily exercise pro­ lifting, isometric exercise, golf and other 9. Obtain good equipment. This is gram. The type of program will depend slower games are not as good for cardio­ especially true o f footwear. If is fool­ on the needs of the individual. vascular conditioning because they do ish to try to jog in combat boots or to Some ideas to consider: not require vigorous activity for exten­ play tennis in sandals. 1. It is wise to consult a doctor to ded periods o f time. These activities 10. Always warm up slowly before see if there should be any limitations to are good for improving flexibility, gain­ taking part in any vigorous activity. vigorous activity. ing strength, and developing coordina­ Also, cool down slowly after vigorous 2. Decide what is to be accom­ tion. activity. plished: lose weight, improve cardio­ 5. Start slowly. You can’t get in 11. The day following an especially vascular efficiency, improve strength, shape in a single workout. You are hard workout, it is advisable to ease up a increase flexibility, develop coordination less likely to get s tiff and sore if you bit on the intensity of activity. This (strength, flexibility, and coordination gradually increase the amount and in­ will help to prevent soreness. are important factors in throwing a hand tensity of your workouts. However, you 12. If help is needed in planning a launch glider.) must be willing to work through periods workout program, check the local high 3. Set up a regular workout schedule. when you are a little uncomfortable. school, college, or recreation department It is easy to decide that you don’t have 6. Working out on hard surfaces is for a physical fitness class. Read Dr. enough time. However, if you believe very hard on the back, legs, ankles, and Kenneth H. Cooper’s book on aerobics. in the value of physical fitness, it is not feet. A jogger should try not to run too (Dr. Cooper provides charts for numer­ very smart to consider other things more often on sidewalks, streets, or hard run­ ous activities which show exactly how important. ning tracks. Grass is much softer. much workout is needed to keep fit. 4. Establish goals and then plan a 7. Try to find someone to work out He also includes various graduated work­ program. Remember, there are no short with. Pick a partner who is about as out programs for people o f varying cuts. Cardio-vascular efficiency can be fit as you are. If he is able to perform degrees o f fitness, and includes a simple improved through exercise by raising much better than you, you are more test to determine an individual’s level of the rate of the heart beat well above likely to become discouraged and quit. fitness.) φ

The MODEL BUILDER 43 44 The MODEL BUILDER ably in a wide left-hand circle with a right glide. Adjust glide circle with rudder, power circle with engine thurst changes. Ailerons may be dropped on "low” wings to bring plane into safe bank attitude. It is capable of beautiful R.O.G.'s, but may take a bit o f a breeze blowing over the fin/rudder area to keep it from ground-looping. HUNGERFORD SPOKE WHEELS DETAILING A "must" for vintage model aircraft Most details arc better left until after

Available in many sizes for small indoor test-flying damage is repaired. Save types, control line and small R/C. Send vacu-formed louvers, hypodermic white- stamped envelope for complete list. glue dot "rivet heads” etc. until last. • Dealers inquiries invited · Color-doping before test flying is a FH WHEELS ■ 1770 Lilac Circle waste. Clear dope will do. Finish Titusville, Florida 32780 plane only when you are satisifed that it is “ ready for action” . Waco...... Continued from page 7 7 "just-below-flush” . FINAL NOTE hollowed out block is adorned with EMPENNAGE This plane should beconsidered “ semi­ angled platform for Kraft-Hayes beam A removable tail-block is keyed into scale” . Many liberties have been taken motor mount. Use thin "tin-can’’ soldered the rear of the fuselage and held on with to make it rugged, flyable, and easy to nut-plates behind K-H firewall mounting. a metal screw. The stab moves as an build. A "Superscale” model of this Actually, the amount of down-thrust entirety, as does the fin/rudder. Moving aircraft would be a joy to behold, but shown on the plan could be increased by just the elevator or rudder is much less would give you ulcers crashing about in a degree or so. This was not possible on efficient as altering the shape of the nasty flying conditions. Hang glider the original, as I had the dummy motor surface reduces its docility. Movement pilots recommend that you never fly in the way of major adjustments, but it right or left of the fin/rudder pivoting higher than you would be willing to would improve the flight characteristics. on its vertical 1/8 inch hardwood dowel fall; I recommend that you never put A bit more right thrust might also help. is accomplished by a nylon screw with more work into a scale model than you Plywood gussets for the landing gear its head caged in nested aluminum tubing are willing to see go down the drain in wire attachments are recommended. working a nut affixed to a wire attached one bad flight. Don’t get discouraged, INTERIOR to the leading edge of the fin. The up- though. The Waco is gorgeous, it is Lordy, Lordy, if you’ve never tried and-down movement o f the leading edge forgiving, and as model subjects go, covering an airplane on the inside you of the stab is accomplished by two nylon it exudes sex. Who can resist? are in for a treat! Silkspan cover inside screws in nutsepoxied into the tail block NOTE: Although the model now to represent white naugahyde. Seats pushing the L.E. up against a couple of resides in Russ Barrera’s Model Museum are vacu-formed (Mattel) to save weight. small coil springs pushing down on it in San Marcos, the subject ship was Window cranks and minor hardware arc from above. These screw adjustments destroyed some months ago when a made by soldering a blob on a pin and arc, in my view, the best approach to crank let go, allowing the prop to filing to shape. The panel, which took field adjustments for flight trim. slice through the cabin. A sad end to about 20 hours to make, consists of a POWER/FLYING a beautiful matron of the North Las drilled plywood (1/64 inch thick) facing I recommend that the model be Vegas skies. Φ followed by a thin acetate sheet covering flight testedonly after extensive measure­ the instrument faces glued on a stiff ments of incidence angles, alignments, P ylon...... Continued from page 13 balsa backing. The whole thing was andde-warpingof flying surfaces. Keeping Our thinking is that this is supposed held together with tiny flush model wings at all times bound to 3/4 inch to keep the “ Hot Specials” from com­ railroad screws. Some of the instruments plywood boards to keep them tlat is peting! "S tock” means that an engine is were photographic reductions, while cheap flight insurance. Bind them down set up exactly as the manufacturer others, such as the radio dials, were right after doping and keep them flat by specifics within his production tolerance made from artists scratchboard (available constant inspection and de-warping over rating. In most cases, this will still at art supply houses). Placing a tiny, heat (twist in opposite direction from allow “ Reworking” . Remember now, folded map in the map pocket on the warp viewed along underside of wing or even after the engine has been reworked, back of the pilo t’s seat and “ sewing stab). For power I recommend a diesel. it can still remain withinthe specification, department” seat belts with heavy alumi­ The .06 (Icc.) Rebeli Diesel which and thus still be considered "S tock” . num foil ends are nice additions. "Plan­ carried the Waco was 10 years old when The two major custom engine manu­ ting” wee plastic model railroad bolt- installed. Having gone from California facturers are George Aldrich and Clarence heads at appropriate points also catches dry sunshine to Chicago rain with a two Lee. They both have assured us that the eye of the experienced scale judge. week interval, the diesel started on the their engines will perform and yet be The windows are mounted in thin first flip. If an .06 is not available, a “ Stock” by adhering to manufacturers' frames of steamed veneer by flowing hot .049 or an .09 with a throttle would specs. If these people can make engines thinned, clear cement or dope around do, I think. An easily-removable cowl perform better . . . idle, top end, etc., edges. Coating the frame first with o f fiberglass held on by 3 vinyl grommets and still be legal. .. good! cement, allowing to dry, and then moun­ pushed over aluminum stubs coming out Our thinking prior to this was that ting acetate window panes with film ­ of the firewall allows easy access to the the engine should be used as is, out of splicing cement also works well. Take motor. the box. This way of thinking would be extra time and whittle windows to fit The Waco seems to fly most comfort­ great if everyone was perfectly honest.

The MODEL BUILDER 45 The Great Age of Sait ... Lives Again in these Authentic Scale Mode! Kits

m y b e ea s y t o b u il d We know it seems unbelievable, but it's true. New techniques in the heretofore difficult rigging installation and ratline making, are simplified so that almost anyone can produce a craftsman-like job. Density selected prime balsa wood is a real pleasure to work with, and the step-by-step plan is simple and complete.

THEY'RE COMPLETE* With machine carved hulls, that require only a little trimming and sanding. Kits include many finely detailed cast metal fittings (as required for each kit) such as: Cannon, Life Boats, Windlass, Anchors, Steering Wheel - Wheel House, Water Cask, Lights, Stem Castles, Figure head, etc. Brass Chain, Black and Tan rigging line, Printed Cloth Sails, Decals, Display Pedestals and much more . . .

* Dry Kit p*int and cement not Included.

SCHOONER BLUE NOSE KIT G3 — Length IIW '

THEY'RE UNIQUE Because such amazing detail and authenticity is achieved in kits that are relatively easy to build. SPANISH Plans include full size, as well as GALLEON assembly drawings for each step of KIT G1 — Length 10" the way. Authentic color scheme shows on full color kit box lid.

THEY'RE HISTORIC Plying the Spanish Main, the Galleons carried the treasures of the New World back to Spain. Outfitted with cannon they were used USS FRIGATE both as merchant men and warships . . . The Blazing Guns of the Constitution helped to establish our Nation. Now CONSTITUTION enshrined in Boston Harbor, it is the oldest commissioned vessel KIT G2 — Length 11" in the U.S. Navy . . . Built by Angus L. Walters the Bluenose was one of the finest Schooners to take the water. It came to world-wide fame racing against the Gertrude L. Thebaud. Bluenose captured the hearts of U.S. and Canada to such an extent, that today it is on the back of every Canadian Dime. THEY'RE ONLY

• CARVED WOOD HULLS .95 • CLOTH SAILS AND THEY'RE AT YOUR DEALERS NOW 6 ea. • CAST METAL FITTINGS GET OVER AND SEE THEM . . . BUY ALL THREE! You don't have to STAND OFF to admire this SPECIAL THANKS The beautiful Citabria is manufactured by one of the oldest and respected CITABRIA names in American Aviation, The Bellanca Corporation, who so graciously provided us with the plans, photos and details of the full size aircraft. With this illustrious lineage, it is not surpris­ ing that the Citabria is just about unbeatable as a fun plane. Primary trainer, or for Aerobatics. CITABRIA IS FOR YOU If you're a Sport Flier, if you have a feeling for Scale, if you love R/C*, then this is your ship. It’s a beautiful machine that builds easy — goes to­ gether fast — plenty of room for any equipment — rugged for hard use — flies great — and is just about the right size. Span 54 " Area ^15 sq. in. Length 36“ fo r Engines .23 to .35 Scale: 1.6i“ Equals 12ύ"

ABOUT THE KIT ITSELF THE FUSELAGE WING AND TAIL SURFACES This kit is a real joy . . . Balsa Wood is Fuselage sides are die cut full length. Complete wing is built on work bench break or slip. Rudder and Stab are the finest grade, density-selected and Cabin sides and inner doublers are without having to remove it — so it's die cut sheet for simplicity and no sanded to micrometer tolerance; as is plywood as are the firewall and land­ flat and warp-free. Parts are die cut warp. Included is all the linkage hard­ the imported Finland Birch Plywood. ing gear bulkheads. It's easily as­ and carved Balsa sheet cover makes ware: pushrods. aileron and elevator Every part is numbered to insure fast sembled with die cut balsa bulkheads, for tough wing. Wing is installed like horns, bellcranks. clevis, connectors, and accurate assembly as shown on nose block, formed music wire landing it ought to be — with dowel pins and etc., plus giant authentic decals, plas­ the easy step-by-step plans. gear, custom dural engine mounts, etc. nylon screw in wood nut-block. No un­ tic windows, etc., etc. * C an b? down Control l me too instructions Cowling and wheel pants are rugged sightly rubber bands to deteriorate. on plan plastic. STRUCTURE Frame Photo reveals the excel­ lence of the design engineering of the kit. Although structure is relatively simple, it is one of | fine detail and ereat streneth.

SPAN; 87%# LENGTH:37%' WEIGHT: 12 OZ. over seven feet o f sheer grace and beauty... SCALE: 1.5 Equals 12.0

GREAT FLIGHT PERFORMANCE A FINE KIT A real soaring machine is this model Cirrus. Top quality Balsa used throughout. All parts Eiffel 400 soaring wing section seeks out and accurately die cut and numbered to insure fast takes full advantage of every thermal current. accurate assembly, as shown on the detailed Can be flown Tow Line - Free Flight, Single plan. Also included are shaped trailing edges, Channel or pulse R/C for Slope and Thermal finished nose cone, giant clear canopy, authen­ Soaring. Large Cockpit area provides ample tic decals, full size plans with step-by-step room for R/C Equipment. drawings and instructions, etc.

STIRLING MODELS · >1111110 AVI ond WISTIR ST · PHIlA . PA 19144 If no deal·' ovo'lobl·. direct ordo't occep’ed— with 10% oddifgn, contlrudion, co*enng. fmitKing. flying, adjutimg. control tytiomt. ole ?Sc enclosed [7] Socroit of Control lino ond Corner Flying Including preflight. soloing, tlunlmg. Como' ruiOl ond roguloliont. Corner flying Innlt 0 "d control Imo mtiolloiion intlruc'iont ?5c onclotod No checks Only U S money orders or currency accepted

N o m e ______i AVAILABLE IN CANADA A d d r e s s ______C ity ______S to le ______Z i p ------1. George Aldrich now has avail­ able the OPS ABC RV Racing PATTERN FREE 40, with side exhaust. A rear exhaust version will be available FLYING! v FLIGHT! J later in the season. 2. RAF. Jack Frye, of Englewood, Ohio, sends us word that his RAF ABCD engine is now ready and will be competitive for the 1973 season! F L Y WITH - 4 0 ’ s 3. John Maloney, of World Engines tells us that the new Supcrtigrc X-40 will be ready for the summer season. 4. K&B hints that there may be some more Racing 40's produced before “ Series 71F” K&B .4 0 “Series 71F” K&B .40 R/C the Nats. W/FRONT ROTOR W/FRONT ROTOR 5. Rumors are Hying that there will The K&B .40 R/C "Series 71F” has been The K&B .40 "Series 71F" is a standard be a ROSSI 40 very soon! Mercy! engineered with power to spare. Others version of the K&B .40 R/C. It is the These are just a lew choice stories that have tried to duplicate its performance* same powerful engine, less the Perry have been floating around! . . . none have succeeded! Ideal for that Carburetor and Exhaust Valve Control. beautiful scale airplane or pattern plane; Reference is made to the drawing of it provides all the thrills and perform­ Both engines feature K&B's exclusive the Supertigre X-40. There have been no tension, single ring and aluminum ance of the "big jobs.” No engine in its quite a few minor changes made since size class offers better control, from top piston and a hemispherical head speed to idle. Instant response is machined from solid aluminum bar this preliminary drawing, however, the achieved through an exhaust valve con­ stock. For Free Flight at its best, power basic mounting dimensions and size of trol linked to the specially designed your model plane with a K&B .40 the engine are reasonably correct. This Perry Carburetor "Series 71F" with front rotor. should give you Supertigre lovers a ■’Power to size ratio chance to see whether or not your plane will take it! Good luck with that rear exhaust system! *37.00 <31.00 The rear exhaust system will definite­ ly cause problems in the design, location and vibration of exhaust ducting. Last season we used an RAF in a Stafford Minnow. Although the engine finished every race entered, it was not competitive and encountered many problems with rear exhaust vibration and ducting, not to mention pilot vibration! A probable solution is to incorporate the exhaust system in the aircraft, with the engine assembly completely separate, as in some Rossi 15 powered free-flight versions. Side exhaust, currently, seems more See the complete line of K&B engines at your favorite hobby shop. desirable from a building standpoint. K&B MANUFACTURING The Formula I season will be under­ way by the next issue. Fmll race reports DIVISION OF AURORA PRODUCTS CORP. 12152 WOODRUFF AVE. DOWNEY. CALIFORNIA 90241 will be forthcoming. GOOD LUCK!!!!

The word RACE will see to it that there Race Schedule has been selected! For M exico...... Continued from page 23 will always be some who will do any­ Formula I, the 1972 National Champion­ with "pie” ), and the Open class, named thing and everything to try and win! ship will be held at Mile Square, Fountain a "Thompson” race, and sponsored by I guess this is only natural becuase it Valley, California, Nov. 22-25. The 1974 Enrique Velasco, one of Mexico’ largest happens in any kind of competition. Championships will be at an FMPRA hobby dealers, importers, and manufac­ We now say, “ If the engine will idle selected site in Florida. The 1975 turers of a line of excellent model for 10 seconds, hands o ff . . . wheels (all Championships will be held at Corpus products distributed under the brand of them) free rolling, and on smooth Christi, Texas. The Southern California name o f "C iclon” . pavement, have at it!!!” As the rules district will host the 1973 race. Chuck There are a few rules in the Open read now, there are some engines that Smith is handling the pre-contest plan­ class: engines of .40 or less displacement, are"out-of-the-box” stock and some that ning. This "Tournament of Champions” landing gear, cockpit with pilot, and are “ Reworked-and-still" stock. If you will have the top twenty or twenty-five some realism is desired but not enforced. want to win, you had best be in the percent o f each district represented. Prior to the beginning o f the races, second mentioned group! We would It appears that 1973 will be the year thecontest site had the usual atmosphere, like to hear your comments. of the engines in Formula I. Here are screaming engines, the last minute test The NMPRA National Championship the latest facts and rumors: High tsand general rush always seen at such

48 The MODEL BUILDER times. Only this time the events were and Third places went to Manuel Sierra, highlighted by the presence o f a team Roberto Mathelin, and Salo Feiner. from Mexico’s Government Television Just to keep it all in the family, Station, Channel 13, which was filming Roberto took home a most attractive material foraseries entitled “ The Fascina­ plaque, donated by his father, Gaston ting World of Aviation” , scheduled to Mathelin, owner o f Mathelin Modelismo, start May 1st. As the winner of of Mexico City. the only already completed racing event, Winners o f the “ Ciclon” Trophies Bob Root was interviewed, filmed, and for Open Class were: First, Salo Feiner; will doubtlessly be presented to Mexico’s Second, Luis Castaneda; and as a very TV audience as“ the Norteamericano with pleasant surprise and welcome change, • SATELLITE 1000 PRO-KIT# the winning ways. Third place was won by 17 year old The first race of the day set the pace Horacio Bcrruicos, also of Mexico City. AMA SATELLITE RECORDS for the entire day: fast airplanes, good The tremendous trophy seen in one 8 unbroken as o f April 1973 flying and lots of the general excite­ of the accompanying photos is also do­ CLASS B-C-D ments of racing. This first race also saw nated by "C iclon" and requires three fo r engines .29 th ru .41 the only sour note of the contest. wins in the Open Class to take home. KIT PK 1000 FEATURES . . . . It came about as a series of unfortunate There have been two previous two-time • 130 PRE-CUT PARTS circumstances, probably none of which winners, but neither one made it the o f the finest balsa and plywood. could have been prevented, but which lucky three this year. I have mentioned • FULL SIZE PLANS we must all heed as a warning. in earlier contest reports that our South- complete detail and contest trim. It was the end of the first race, of-the-Border flying friends are gung-ho pretty much a clean sweep for Bob Root, competitors, right down to that last • EXPLICIT BILL OF MATERIALS who pulled up into a perfectly executed inch under the checkered flag. Yet, an for straight wood on plans. three turn vertical victory roll, cut the almost unbelievable spirit o f friendliness $24.00 engine and set himself up to land. prevails. As an example, one of the DIRECT ORDER ONLY At about the same instant, one of the mentioned two-time winners for the NO C.O.D. PLEASE other flyers had engine failure, down­ “Ciclon” trophy was offered the only Add $2.00 U.S.A. Postage & Handling wind, and extremely low. In his attempt K&B Schneurle 40 in Mexico, by one Cal. Res. A dd 5% Sales Tax at a downwind landing, his airplane of his competitors, to give him a better SATELLITE CITY struck Bob on the upper part of left arm, chance at that big chunk of hardware. BILL HUNTER 9486 Sandusky Avenue from the rear. It was a scary few minutes The other U.S. contestants, not pre­ Arleta, California 91331 for all of us but not at all serious. I viously mentioned were Henry Bartle, 213-899-2301 have since heard from Bob and Kathy of Huntington Beach, California, and after their arrival back in Washington, Jerry Krause of EK Products, Hurst, A list of the known 50-800 kit and all is well. Texas. manufacturers follows: Black’s Boat That it could have been much worse All in all, we, the U.S. contingent Accessories (Warrior II,Harvey & Etchells is evident. That absolutely no one is had a lousy time. It is really terrible 22), 4761 Niagara, San Diego, Ca. 92 107; to blame is also evident . . . and this I place where you are forced to survive in Carr's Boatyard (Flying Eagle), 2 7 13 am convinced of, since I was on the accommodations not unlike to Beverly Blaine Dr., Chevy Chase, Md. 200I5; runway as an interpretor/assistant to Hilton . . . you are almost always Hartman Fiberglass (Mark I), Argenta, the Roots. The lesson I learned, and uncomfortable from being overfed . . . III. 6250I; Model Yachts and Things one which I will pass on to you racing you are tired from lack of sleep due to (50-800), P.O. Box I05, Collierville, bugs, for what it’s worth! Signals. Not being forced into night clubs, parties and Tenn. 38 107; Scoltie Shroff (Phoenix), only the Readeeccc . . .TU R N signals, belly splitting banquets . . . your hands 2410 Caramillo, Colorado Springs, Co. but a DUCK LEFT-DUCK RIGHT-DIG ache from handshakes . . . you get 80909; Vortex Model Engineering (Soling) A HOLE, or something that you as a talked o u t. .. and you almost miss your 2 10 E. Ortega, Santa Barbara, Ca.93101. team have practiced for in such an airplane on the way out because so many If you are interested in joining AMYA, eventuality. Had we previously practiced people insist on wishing you a good trip send your dues ($3.65 . . . penny a day) this, I believe I might have guided Bob home. YOU wouldn’t like it at all, to C.H. Black, 4761 Niagara, San Diego, out of the airplane's path. yet we, as neighbors to Mexico, can’t Ca. 92107. Any comments or informa­ Another lesson I learned is that if I ignore the goings-on down there. So YOU tion to pass on drop me a line, P.O. ever take up drinking seriously, I’m stay home, and our little group that has Box 639, Escondido, Ca. 92025. moving to Mexico and will make a been going down will continue to make See us in our booth at the MACS practice of being run into by airplanes. the supreme sacrifice and w ill go again, Trade Show, Anaheim, California, June Prior to the mishap, and all during the in an effort to preserve the continuing 3 0 - July 3 1 . · contest, there were no more bottles friendship between the modeling popula­ insightthanyou find at the neighborhood tion of both countries, · Mooney .... Continued from page 31 AAA meeting. Yet, after we all got The cockpit opening and side windows calmed down again, Kathy'scorn ment was Main sheet. . . Continued from page 28 are simulated with blue tissue doped that if they had had every drink that (Diegan). over the lighter fuselage covering. I was offered to them they would have In the Santa Barbara Class, Bill Barton don’t know how they ever got away stayed bombed all the way back to and I tied for first with 11 boats entered. with that tiny windshield, but there Seattle.. West Coast 12 Meter was won by Jack it is, make it out o f thin plastic. With Bob, almost a sure winner, out Thomas with 8 skippers competing. An open cockpit model deserves a of the race, the FIA (remember, in Jim Atkinson, one of six skippers, took pilot. Mine was carved out of a piece Mexico, you pronounce it) First, Second first in the Regatta Design Class. of very lightweight styrene foam. This The MODEL BUILDER 49 PLANS GrTHINGS PLANS · ACCESSORIES · SUPPLIES

BD-4 Peanut plans by Bill Hannan. Span 12-3/4", Fokker Fil Peanut plans by Walt Mooney. Span 13", stick and tissue ty p e ...... 75«! stick and tissue ty p e ...... 65«! FIRST CLASS postoge odd 25c. W . C. H A N N A N . GRAPHICS. P.O. BOX A MANY MORE! SEND A QUARTER FOR OUR CATALOG! Coiifornia customers odd 5% . E S C O N D ID O · C A L IF O R N IA 9 2 0 2 5 is used for packing radios and other power, Royall Moore suggests using dihedral after windy weather tows. This delicate equipment, is fairly easy to come a drop of contact cement on rubber can be corrected by merely using regular by and adds almost no weight to the motor knots to prevent slippage. modeling music wire for joiners. The model. The pilot is painted with plastic REALLY BIG SHEW! towhook is easily replaced with an model paint and cemented to the model Stan Fink has developed a simple FAI Supply version. with white glue or epoxy. Regular one-man winding rig for Peanut Scale Local fliers here have tried using dope or model cement will dissolve models, made from a shoe box. Stan tapered doublers of 3/32 x 3/16 inch styrene. cuts a hole just large enough to clear spruce glued to the main spars for about The model in the photos flies nicely a wound rubber motor, in one end of 12 to 15 inches o f the main panels, to and will make perfect takeoffs and the box,about an inch down from the top improve overall strength. This eliminates landings in a reasonably smooth area. (exact location might vary, depending the perennial weak spot just beyond the It is powered with asingle loop of 3 /16th upon the model’s configuration). The wing wire tubes. A break-away wingtip flat rubber 12 to 14 inches long, and aircraft can be placed into the top of made by joining the centersection to the requires about 1/16th ol down thrust to the box with its wings resting on the tips with double 1/4 inch balsa ribs (butt- keep the nose down under the initial box sides. Note that certain models glued as on a HLG) makes an easier- power burst. It is adjusted to fly in wide may fit best in an inverted position. The to-repair wing, and a fiberglass boom left circles. Best time so far is only 30 rubber motor is threaded through the adds a final touch. seconds, but it’s capable of much more hole (nose block removed) and the nose Contributions tothiscolumn are more under the right circumstances.® of the model is guided against the small than welcome . . . send them in! φ hole in the box. If necessary, the rear Hannan .. . Continued from page 29 of the model may be anchored with a Draggin' Fly . . Continued from page 17 rubber motor by blowing on the back rubber band placed around its fuselage summer days which seemingly were side of the prop. just forward of the tailplanes, but many designed especially for R/C sailplanes. CROW HILL MODELS models w ill not require this. There is no long list o f awards or New products for rubber-power en­ Brace the box against your foot, and important competition statistics to hang thusiasts are being offered by Crow Hill proceed to wind the motor with a out for review. The Draggin’ Fly has Models, Box 37, Mill River, Mass. 01244. winder. The tricky part involves getting never been registered on a contest flight One is a double geared motor unit, the wound motor on to the prop hook, schedule. An introduction to battle especially suitable for short-nosed scale as the motor must first be passed through remains to be made by subsequent models. It has the advantage of concen­ the hole, etc. Perhaps a slot above the builders . . . Hyer’s original is still pure trating the weight toward the front of hole would simplify matters. (E ith e r and true to purpose, the casual challenge the model. Twenty percent more turns that, or simply let the box go along for of sport soaring. and a more even torque curve are claimed, a rid e ! — wen) φ The Draggin’ Fly is not difficult to as compared with a similar amount of build, but it’s not a weekend project. rubber used ungeared. Free-Flight. .. Continued from page 37 There are a lot o f pieces .. . mostly sticks The unit is very cleverly and strongly They also last forever, or at least it seems and other straight cuts. The basic constructed, and features nylon gears, a that way. Most good sporting shops carry structure of the forward-cranked wing brass pinion, ball thrust bearings, a one or the other, and some Thom McAn panels is quite similar to modern compe­ winding loop, plus a positive action free­ stores now carry Adidas. tition tree-flight practice .. . check some wheeler. Provision has also been made for DRAGMASTER MODIFICATION . . . of those "Fast Richard" Mathis brain­ easy thrust adjustments. Supplied com­ While the "Dragmaster” kit is no storms. The V-tail hasn’t a rib in i t . .. plete with a carved balsa propeller, the longer being produced, there are still just geodetic capstrips and sheet balsa product sells for $5.95. The 73/i inch several to be found on dealer’s shelves movable surfaces. The fuselage is classic diameter props are available separately and in workshops around the country. . . . functionally as developed by years at 95 cents each. Crow Hill Models also The basic design is sound, but as Tom of practice and evolution. A review of offers lightweight stabilizer incidence Hutchinson has noted, the kit had Zaic’s Model Aeronautic Yearbooks will adjusting screw jack assemblies, for only changes which did not improve it any. substantiate its heritage. 50 cents each. The wing wire stock was much too soft, Ifyo u ’rea Builder you may be on your While we’re on the subject of rubber for one, thing, leading to much added way to the local balsa dispensary before

50 The MODEL BUILDER Su-Pr-ROD T.M. t h e A U WEATHER p u s h r o d BEATS THE OTHERS HOT O R C O LD \ T O L E f ln

44" LONG WILL PUT A ON YOUR FACE AND FLEXIBLE

PLAINFIELD. ILLINOIS 6 0 5 4 4 MAKERS OF ADVANCED PUSH RODS SYSTEMS: PROROD-NYROD-MASTEROD & MASTEROD-XF reading this far. If you have yet to achieve wood shims . . . plywood is best . . . of Quick; Be ready on the transmitter and that happy status, give the Draggin’ Fly various thicknesses so that you can get that nose down as the climb speed/ a chance to help you know an added accurately adjust stabilizer incidence on rate starts to slow. Don’t dive it into dimension of pleasure in your chosen the field. These shims should be about the ground . . . just round o ff the climb sport. You’ll find it to be a project of an inch long and '/ι inch wide. Remember and utilize the altitude. Let the flight long lasting and most prideful rewards. to make them in sets because they must speed stabilize, then let it glide hands-off You may even learn something. It be used on either side of the V saddle. . . . if it looks safe ... to almost touch­ won’t hurt. A couple of sets o f 1/32 and 1/16 will down. A bit of a flare by gentle back CONSTRUCTION give you enough combinations to make stick might soften the landing. One Building details are on the drawings .. . adjustments in 1/32 increments. thing to keep in mind for almost any where you need them . . . and won't be Check radio equipment operation . . . aircraft/flight situation: a little too buried in this text. So what’s left to and especially the movement o f control much speed is so much better than not say? Maybe a bit of philisophy rather surfaces in relation to movement of quite enough. than specific directions. How about control sticks. This is especially impor­ Give the Draggin’ Fly a chance and this: “ Waste a little balsa if necessary tant in rigging the V-tail arrangement. those early hi-start or winch launches to get good joints . . . and enjoy. This, Be sure you’re right. The surface on should be a pleasure. There’s no reason Friend, is modeling." the side of the direction of the turn not to enjoy first test flights . . . if you PREFLIGHT moves “down". This is opposite to do your homework and take your time. Do it at home . . . not on the field. the roll action caused by ailerons, so . . . and that’s it ... Φ We’re talking about pre-flight check-out don’t let that confuse the issue. Up's Essentially this menas toknow what your still up. T-Cars.... Continued from page 42 machine is before you commit it to flight. FLIGHT TESTS firing impulses of the engine if the Check for unwanted warps .. . washout The Draggin’ Fly is just the right flywheels didn’t smooth out the power. as called for on the plans if good stuff, size for meaningful hand glide tests . .. The best way to mount a flywheel but must be equal in each wing panel. if you know what you’re doing. It’s ison a tapered shaft. This method won’t Wing and stabilizer should be square to got to have air speed . . . and a reasonable allow slippage, and if made properly fuselage center line. Dihedral should be angle of attack when released. Otherwise to begin with, is the truest running the same distance above horizontal on it’s just going to go out there a-ways system. With a key, the entire horse­ either side of the fuselage. Balance point and die. The Draggin’ Fly . . . as most power is transmitted through a tiny piece should check at, or forward of, point sailplanes of reasonable size and loading o f metal to the flywheel. Also the shown on drawings. About 14 inch . . . flies at someplace around 15 mph, flywheel may not run true to the shaft. forward will be safe for test flights. maybe a bit less. If you can run at this If you must use a set screw, use only And while you’re checking, find out how speed, you oughta get in touch with one. Two or three can never be set to much weight change gets the CG right the U.S. Olympic Committee, ‘cause run true. Be sure that the flywheel is on the 33 percent point. Write it down 15 mph is like a 4-minute mile. (B u i balanced with the access holes to the set so you can remember it at the field. It's don Ί call 'em unless you can run that screw drilled and the set screw in place. an odd day that is calm enough that a fast for the whole 4 minutes! — WCN). If you are going to be running at high good balance check can be made outside. They might have a spot for you. But RPM’s (and who doesn’t nowadays), Do it at home . . . then, at the field in case you’re not of championship stock, don’t use cast flywheels but stick to “ by the numbers” . plan on giving that sailplane a heave as onesmachined from bar stock, be it brass, Make careful measurements of the you let it go. steel or aluminum. Ify o u th in k a broken stabilizer setting. The angle must be Chances are you’ll (a) hand launch blade is bad, imagine a chunk of brass negative to that of the wing . . . which the thing at least slightly nose high, and coming loose at several hundred RPM happens to be parallel to the top surface (b) . . . hopefully, due to “ a” . . . fling surface speed. Lighter aluminum fly ­ of the fuselage. Minimum angle should it at a higher speed than required for wheels are used where instant RPM be 1 degree, which measures out to be level flight. Thus, expect it to climb is needed and time can’t be taken to about I/ 16th inch. More negative is all immediately upon release . . . also and wind up a heavy brass one. Keep in mind right, but shouldn’t go much beyond 2 expect an immediately following stall if that these are used at the expense of degrees . . . about 1/8 inch. Prepare you don’t do something about it . . . smoothness and occasionally the drive

The MODEL BUILDER 51 ., cast aluminum versions). The hole in the center o f the shaft has been reduced to .175 I.D. ^ ENGINE MOUNTS (old one was .191 I.D.) and the shaft has Engines run smoother and cooler on Tatone Engine Mounts. been relieved around the port opening .. . The cast aluminum absorbs engine heat and provides a solid support for better engine performance. Tatone mounts are for less drag. The thicker shaft has one piece and easy to install and are most often specified enabled them to produce a much rounder on magazine plans and in kits. For your convience, we make crankshaft, and at the same time it a mount for 33% o f all engines made and always in stock, helped to pack the crankcase. The back I/2A Short or Long — $2.00 .09 Short only cover has been thickened .015 which .15 Short or Long -- 2 GUARANTEED .19 Short or Long — 2 also helps to pack the crankcase. .29··1«0 Short or Long -- 2 to satisfy .<45”. 59 Medium only — 3 There are several changes in the ,

52 The MODEL BUILDER town Internationals. that’s all. Not so in Japan. R/C car After a few minutes o f the traditional racing is big! There was to be a big slope Japanese lea ceremony (that is, you have soaring contest outside Tokyo that week­ green tea and relax a few moments), end but unfortunately I was leaving for we launched into a bi-lingual conversation the Stales and missed it. I did not see that at times, I thought, went very much as much interest in scale as I think there astray. I tried a joke . . . to Mr. Tsubota is in the States, but sport flying is big I said that my subscription to his and I would guess that 95 percent of magazine had run out and I had come all the engines, kits and R/C equipment are this way just to renew it! I was sure this made in Japan. There is a wide variety would convulse them and break the of kits and fittings that are never seen ice somewhat. Mr. Tadokoro translated in this country. Seme of them most ... Mr. Tsubota looked at me. Obviously exceptional, and I am sure they would the joke lost a whole lot in translation. enjoy some real popularity if imported Question to the Editor: Would he to this country. Unfortunately the U.S. like to know about R/C in the U.S.A.? dollar, at this time, does not enjoy a Answer: No. favorable exchange rate in Japan (and in Question:; Would he like to ask me many other countries as well) and, as anything at all? said before, there were no bargains Answer: No. to be had. Had I been able, I would have By this time we all realized that we brought some kits back. They really weren't getting across to each other, impressed me. For example, there so a young member of the Staff, Joe would be a kit for areally beautiful .60 Joeichi was called in. Joe is a modeler powered pattern type plane . . . in and also a ham operator, and is the new addition there would be a .40 size kit editor of one of their magazines, The and also a .19 size kit . . . all of the same Mobile Ham. This is a new magazine plane. Further, I found a wider variety devoted to Hams who operate their of kits and in all sizes than in this stations from automobiles . . . popular country. Oddly I found that dry cells in Japan as well as in the States. Joe’s are popular in transmitters as well as linguistic accomplishments mainly re­ airborne packs, especially for the sport volved around ham radio, and when he flyers. I would assume they are cheap found I had been an active ham operator and due to the small size o f Japan the (W4KFK) for twenty five years he plied delivery time from factory to consumer me with questions and we began to is short and the batteries would normally drift farther and farther away from be fresh. My only regret is that I did I W l / , . model airplanes. not have more time to browse the Finally, a most engaging modeler, hobby shops and visit more with my concept's n Mr. Yoshiro Sato, who is a friend of gracious hosts. Japanese R/C modeling MB’s editor, was called and shortly is big . . . really big and I was very open gim bals dropped in. Now the conversation picked impressed. They are ahead o f us in many up and we were able to get through to respects. from each other. Later Mr. Sato took me I have a few of the Japanese magazines to some of the local hobby shops and I would reluctantly lend (on short loan) was most kind and accomodating to me, to any interested parties who wanted to in that he spent most of the afternoon, see one. It is all in Japanese but the RS System s driving me to the shops and translating pictures tell most of the story. has taken a step forward by using the for me. It was his day o ff and he had Also I would appreciate hearing any modern molding techniques of D & R been flying that morning. His Formula commentslromany whoread my column. Products, and is introducing the first truly precision OPEN GIMBAL I racer was in the trunk of the car. Questions, comments and such are most STICK ASSEMBLIES. All parts are To sum up some interesting observa­ welcome as well as contributions for accurately molded of tough nylon for tions about Japanese modeling. First off, publication, pictures and the like. continuity between part to part and their magazine has a tremendous amount If Chief Editor doesn’t mind I’ll add stick to stick. All functions are supported by bearings, thus removing of advertising and the magazine itself if that I also collect old ignition engines any play or interaction between channels. the size and thickness of Popular Mech­ and if any of you have any oldies I No other stick assembly, open anics. It is full of drawings and kit could add to my collection, I’d appreciate or closed, can approach the D & R reviews and such, much like our maga­ hearing from you. stick for smoothness or accuracy. zines in thisxountry, only much more of Next month: more on sport flying. it. R/C modeling is not limited to Frank Schwartz airplanes. Gliding, boats, helicopters, 2400 West End Avenue dune buggys, cars and even an R/C Nashville, Tennessee 37203 φ model motorcycle (I’vegot the magazine 2407 SOUTH BROADWAY pictures to prove it) all enjoy much SANTA ANA, CALIFORNIA 92707 interest. R/C cars have died much the F/F Scale .. . Continued from page 35 TELEPHONE (714) 979-5822 same way slot racing has in this country. neighbors to raise their eyebrows!) then A few areas have a few adherents but tie a square knot followed by an over

The MODEL BUILDER 53 the MALLARD MODEL FIBERGLASS HULLS For the sport flyer or novice Create your own CUSTOM-BUILT craft — a true triphibian (water, land. snow). Extremely stable . . . simple to build superb water per­ formance. $39.95

the m k ii ISLANDER SPAN 50" AREA 437 SQ. A bit of old nostalgia — IN. ENG. 19-25 WT. 3 3/4 LB. water flying is easy with 3 CHANNEL — sturdy air­ these expertly designed air­ frame construction mounted craft. The answer to fun flying. 36 inch cruiser hull $27.95, 48 inch yacht see your dealer or write hull $35.95. Built-in supports for engine/ direct. $39.95 servo and deck. Virtually unbreakable. Basic white or color. Send stamped addressed the GEE BEE Una · envelope for details. No C.O.D. Add $1.50 shipping. New Jersey residents add 5% tax. 143 E. Main St.. Chicopee, Massachusetts. 01020 Fiberite Co., P.O. Box 61 ______W aldw ick, N .J. 07 4 6 3 .______hand knot, and trim o ff any extra length. is available from Marlow Engineering) is very complete and well drawn. The Lubing the motor is the next step. and stretch the motor as far as you think plans sell for $2.00 per set of four. Again, I choose to use another one of you can go without breaking it. Hold Next month we w ill describe the SIG’s products; SIG’s Rubber Lube. it this way for a few minutes, then ease 1st Annual Flightmaster’s Indoor Scale I’ve seen everything from silicone to off. Wait a few minutes and start Contest that was held at the Marine Air Preparation H used for this purpose packing in the turns, counting them Facility Blimp Hangar in Santa Ana, (Something about to each his own?) carefully, until the rubber motor breaks. California, φ Once the motor is lubed, safely secure Having another rubber motor of the one end of it to your workbench. samesizeand length already in the model, R/C Soaring .. Continued from page 15 Take your winder, (16:1 gear ratio is I w ill wind it 10 percent less than the utilizing 4 or 5 inch drums. Gasengine ideal and this, along with a 9:1 winder, number of turns it took to reach the powered generators feeding AC electrical breaking point of the first motor. This systems will be available at major compe­ -JOIN - is a pretty good rule of thumb to follow. tition events . . . highly variable winch EAST COAST SOARING SOCIETY With the rubber motor inserted into speeds. the Shark, a check for balance was made. More and more contests w ill be staged My model needed a little ballast on the at airfields with asphalt or concrete C y tail. Now for a test glide. The model runways . . . abrasive surfaces that can \ ill had a rather steep flight path. Knowing cause major damage to a heavy, fast­ the balance was right, the solution was landing sailplane. One touch-down can f l y w n f t h u to place a shim under the leading edge eat well into a mere 1/8 inch plywood 'v y / / of the wing, which gives a more positive skid. The N-G-S will have a landing wheel angle. After doing this, the glide . . . some will retract . . . with braking flattened out the way it should be. Yours function. The brake will provide control may take more or less shimming. on the rollout for greater accuracy in For the first powered flight, I usually precision landings. Without a wheel put about 25 turns of the crank (400 brake, these big turkeys would roll into actual at 16:1) and release the model the next county . . . tail high. into the wind. If it goes into a steep The N-G-S will be sleek and slick. climb, down thrust is required. This is No exposed attachments . . . no drag accomplished by placing a shim (paper inducing gaps. The workmanship will matches work well here since they will be masterful and pre-flight preparation not compress like balsa under the load meticulous. Open control hinge lines or created by the wound motor) on the top big, ugly control horns w ill be a tie of the nose block, between it and the back to today. On field support equip­ fuselage. If the model veers too much ment for riggingcheck-out,ballast changes, it to either right or left, a shim on the protective covering and tie-down anchors ECSS members attended a series of opposite side may solve the problem. will be standard in many field boxes. eleven soaring contests that were open to all AMA members. Members of the ECSS If not, a gentle twist of the rudder in What will the N-G-S- look like? It’s were included in a percentage point the opposite direction of the turn should a matter of taste . . . as w ith current system that led to the final ECSS cham­ do the trick. The important thing is designs . . . but probably they will be pionship at the close of the 1972 season. The ECSS has sponsored 21 contests to make any orali changes very gradually. quite scale-like. Seems reasonable that since its beginning in 1970. Contests As it turned out, the Shark didn’t as function more closely approaches were held in seven states this season, require any adjustments and long satis­ many more states and contests are con­ that of full-scale, form w ill follow. The templated for the 1973 season. fying flights have been achieved. N-G-S w ill be long-winged, clean and For additional information, a free Janick Model Engineering of 32 Farley graceful. Three-dimensional beauty... copy of the ECSS Journal, ‘SAILPLANE’, and an application blank, Road, Scarsdale, N.Y. 10583, has come airborne sculptor . . . all that stuff. forward your request to: out with four new Peanut Scale plans The use of thermal sensors in the Clive Sadler, ECSS Sec. for sale. These include Fairchild’s N-G-S will be more prevalent than 46 Oakcrest Drive Dover, DE 19901 PT19, Whittman’sTailwind, ReedClipped current practice, but they won’t be PiperCub.and the Jodel “ D” 150. Each standard equipment. The majority of

54 The MODEL BUILDER SCALE THE HEIGHT OF FUH WITH THESE NEW DUMAS MODELS Shelley Foss Tugboat U.S. Coast Guard Lifeboat Now available in answer to many modelers' requests Here’s a brand new scale model of the U.S Coast Guard a 36” scale model of America's newest type 90’ tugboat A 44' Lifeboat - that's bound to please the most exacting beautiful model that can be the pride of your model fleet. modeler. Makes an eye-catching display model and can be Plywood construction for long life For RC, free running, or display. electric powered with Oumas-Pittman motors for radio Kit TU-36 $47.95 ■ (For the real tug enthusiast, we have a limited control Kit includes die-cut mahogany frames and deck. number of 45” fiberglass hulls which are excellent for steam 1/8” x 1/2" balsa planking and all deck hardware. engines, etc. Hull, with plans and wood for superstructure, is Length 33” , Beam 9". $69 95 Inquire through your dealer or us direct for Kit TU-45F.) Kil S-200 $33.95

Do you get your biggest kick out of your models on the work­ bench, sitting on the mantle, or cruising nearby waters? Whichever your pleasure, there's a Dumas scale boat (a baker’s dozen, in fact) ready to provide you with hours of enjoyment. And you don’t have to be an experienced modeler to have fun with a Dumas kit. Our clear, easy-to-read plans and quality materials and accessories make a craftsman out of a beginner. In addition, all necessary hardware and accessories such as the famous Dumas- Pittman motors, adapt-a-drive marine transmission. Trojan 3Γ Cruiser new cabin cruiser in 1 shafts, props, etc. are available for all models. Γ scale Equally at home on mantle or lake Take a look at the Dumas line at your Rugged plywood construction lor gas or hobby dealer's or send 25C for our complete electric power catalog to get in on the fun. d u m a s Kit TR-31 $37.95

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Chris-Craft 35' Sport Fisherman One look at PT 109 - 33" authentic replica for 15 19 U.S. Coast Guard Utility Boat - 29" beautilully this 35" beauty and your resistance will melt. A cu. in. Glo Plug engine or electric motor and RC detailed model of the lamous 40' workhorse balsa wood kit designed for the experienced Kit includes deck hardware, mahogany plywood Balsa construction for electric power model builder and veneer construction or display Kit N 20 $26.95 Kit PT-109 $24.95 KitS-100 $16.95

The MODEL BUILDER 55 and in the air all around the country. There will be those who disagree with these predictions. They could be right. SANTA BARBARA ONE DESIGN. More than five hundred Others will flip a quick "thumbs down” sold — and »10 can still beat »500! while crying “ it ain’t for the average Length 70 in., mast 72 in., sail area 1100 sq. in., displacement 28 lb. Prefinished guy” . Well, neither is anything else fiberglass hull, deck, cabin and that's worthwhile, cause "average” means k e e l...... S165.00 "mediocre” and that’s just not very interesting. If the N-G-S isn’t for the “ average guy", it ’ll be because of his SOLING-M. Scaled lack of enthusiasm to become involved. from the exciting new Olympic-class three-man keel boat. Length 50 in., mast It won’t be due to cost prohibitions. 60 in., sail area 800 sq. in., displacement Three channels of radio w ill get the 18 lb. For American Model Yachting Association 50/800 "M " class racing. essentials . . . elevator with coupled Prefinished fiberglass hull and deck, ailerons, and spoilers with interconnected machined cast-iron keel . . . $125.00 wheel brake. The airframe may call for 25 or 30 percent more stuff, but BOTH KITS include finished Dacron? sails, spruce spar blanks, stainless rigging, that’s hardly a Wall Street wipe-out. brass fittings, and die-cast aluminum Too difficult to fly? Ask the guy rudder. For two- or three-channel r/c operation with the Vortex sail control who’s flown one . . . not a big, mean, unit. hot machine, but a big, good machine. Chances are he’ll bend your ear about S E E Y O U R the delights o f the larger, heavier ship. HOBBY DEALER! Spelled f-u-n. The N-G-S won’t be suitable for all flying sites, such as some of the smaller schoolyardsutilizedon the the West Coast. The N-G-S may never replace the 8-foot span, 3 pound sport/ competition machine. But one thing’s

210 E«

56 The MODEL BUILDER new ΗβατΗκιτ -CHonneL SYsrem

goes to 4 channels when you’re ready

New Heathkit GDA-1057 Systems, starting at $139.95. There’s no magic involved. Just tradi­ and relative power output meter that tional Heath planning and attention to doubles as a battery-charging indica­ detail. What appears to be a dandy kit- tor. The new compact GDA-1057-2 3- form 3-channel system, quickly and Channel Receiver has a molded nylon economically becomes 4 channels case and connector block for servos with the addition of an optional modi­ and receiver battery pack. It’s com­ fication kit. Order 3 now, add the patible with all Heathkit servos, and fourth later. It’s a system designed to the GDA-1057-4 mod kit converts it to grow as your plans do. 4-channels too. The Heathkit GDA-1057 System uses SPECIAL SYSTEM PRICE «1 - Order 3- the flight proven circuitry found in the Channel Transmitter, Receiver, Receiver popular Heathkit GD-19. The GDA- Battery, two GDA-19-4 Standard Servos, 1057-1 3-Channel Transmitter comes pay just $139.95. with a 2-axis stick assembly. Add the SPECIAL SYSTEM PRICE *2 - Order GDA-1057-4 modification and you put same system as above, substituting either 3 channels on the stick with the fourth GDA-405-44 Miniature Servos or GDA-505- controlled by a thumb tab. The GDA- 44 Sub-miniature Servos, pay just $149.95. 1057-1 Transmitter is available on all SPECIFY FREQUENCY WHEN ORDERING. R/C frequencies, and is housed in a Kil GDA-1057-1, 3-channel transmitter, slender new case for positive one- 4 lb s...... 74.95* hand action during launch or engine Kit GDA-1057-4, 4-channel modification pack for both transmitter and receiver, 1 lb...... 19.95* adjustment. Other top-flight features Kit GDA-1057-2, 3-channel receiver, include all nickel-cadmium battery 1 lb...... 34.95* packs with external charging unit, Kit GDA-405-3, receiver battery. 1 lb...... 9.95* Kit GDA-19-4, standard servo, 1 lb ...... 19.95* vinyl-covered front panel, adjustable Kit GDA-405-44, miniature servo, 1 lb...... 24.95* hand strap, telescoping whip antenna, Kit GDA-505-44, sub-miniature servo, 1 lb. ..24.95*

HEATH Schlumberger HEATH COMPANY, Dept. 238-6 I Benton Harbor, Michigan 49022 ■ The F R E E Heath kit □ Please send FREE Heathkit Catalog. I Catalog has ove r 350 Name______i fun to build kits. Address______t O rd er yours City______State______Zip______i today •M ail order prices; F.O.B. factory. RC-101 i ______i

The MODEL BUILDER 57 Have Fun- Fly the Proven System! wmmn* Pulse Proportional Rudder Only FIBERGLASS GLIDER KITS ASW-15 1 /6 SCALE / S35.00 send check or money order to DIAMANT 1/6 SCALE / $35.00 EARL WOLSLEGER & ASSOC HP-14 2Vi SCALE / $45.00 1024 n. parker, orange, ca. 92667 kits include fuse, canopy, plans & ribs ca. res. add 5% sales tax

PULSE COMMANDER R O SYSTEMS

C om pletely w ired and testeři w ith trans mitter, receiver, actuator NlCAD BATTERY airborne pack and CHARGE R. switch and con nectors. Transmitter battery not furnished

10G15 Baby System '72 S69.95 10G15T Baby Twin System '72 $72.95 Listed below are the winners, models for the seven Texaco meets that have 10G16 Standard System *72 $71.95 flown, and the winning flight times been run to date. 10G 1 7 Stomper System '72 $74 95 26,995. 27 045. 27 095. 27 145. 27.195 Year Contestant Model Winning Time Please Specify Frequency We have airplane kits designed especially for 1967 John Keller PB-2 39:10 pulse, as well as accessories and items from 1968 Don Whitacre Quaker Flash 43:03 other manufacturers in our 1969 K-G, 8 foot version 57:47 PULSE HANDBOOK CATALOG Jim Adams O nly $1.00 1970 Chuck Partch Nimbus 48:32 Completely updated, contains data on pulse: 1971 Russ Johnson Powerhouse 49:36 How Pulse Works, Installation. How to Fly, and much more. 1972 C liff Silva Ehling 1938 Winner 78:29 Price is $1.00 via B U L K T h ird Class Mail. 1973* Chuck Partch Nimbus 31:58 For faster delivery add 50rf for FIRST CLASS. * In 1973 the SCAMPS ran only the Dawn Patrol portion of the Texaco. Ace Radio Control, Inc. BOX MB “ Reflecting back through the seven published (plans or picture) or Higginsville. Mo. 64037 meets run to date, some models appeared kitted prior to January 1, 1939. to be consistent winners. The PB-2 b. The model must conform to the Plug Sparks . . Continued from page 27 was always in contention, flown by two outside dimensions of the original enjoyed watching their models soaring or three modelers. The Nimbus’ flown model. overhead for flights of 30 minutes or by Gene Wallock and Chuck Partch, have c. A irfoil shapes shall not be changed. more. The winning flight that day was a been in the first three places in every d. Wheel sizes shall be the same single flight of 39:10 posted by John meetthey haveentered. The Powerhouses or larger diameter. Keller of the SCIF’s (So. Cal. Ignition flown by F.L. Swaney, Russ Johnson e. Thrust line location shall be the Fliers) with a PB-2. and Hal Cover have always placed. The same (side and down thrust may “ During the first three revived Texaco most unusual Powerhouse was Hal Cover’s be added). meets many models were lost. Even powered with a Cannon .29. This model f. Empennage configuration may be though the wind d rift was not over 2 to 3 had an official flight with a 21 minute changed to permit dethermalizer MPH at any of these meets, when they engine run, and has placed high in every actuation. Character of the ori­ go out of sight straight up there is not Dawn Patrol entered. The Ehling Texaco ginal model shall be retained. much that can be done to retrieve them. model is another consistent winner, easy g. Dihedral angle(s) must conform to Some modelers were very badly shaken to fly . . . many of these have been lost. plans. up by the loss, others were philosophical “ The Powerhouse, Ehling winner and h. Covering material shall be at the about it, figuring it was part of the sport. the PB-2 are easy models to build and builders’ option. However; paper “ Starting with the Fourth Texaco low cost; probably around $30.00 for cloth, or similar materials, cannot Annual, the SCAMPS ran a Dawn Patrol balsa and covering, etc. The Nimbus’s be substituted for sheet wood Texaco event for the modeler who wanted however, are a model builder’s delight, or metal. to enjoy the long flight and still not lose planked fuselage, sheet covered and cap i. Wing span (planform) shall be no his model to the booming Taft thermals. stripped wing and stab . . . very similar less than five (5) feet. The Dawn Patrol starts at dawn and ends to the Cavalier in construction, but I j. There shall be no restriction on at 10:00 AM. The regular Texaco believe a much better flier. Both models wing loading or power loading. event starts at 8:00 AM and ends at were originally designed by Ben Shere- k. The model and its plans shall be 3:00 PM with no flights after 2:00 PM. shaw. Although the Valkyrie designed presented to the Contest Director This gives the contestant time to get by Carl Goldberg, never won a Texaco, for processing. The contestant back for the awards at 3:00 PM. The it always placed high and it was the should be prepared to do this at Dawn Patrol meet has cut down the winner in the first Texaco Trials” . the time of entry. losses considerably. Average winning Following are the rules used by the FUEL time in the Dawn Patrol is about 30:00 SCAMPS for their revived Texaco trophy a. Fuel shall be furnished by the minutes, while the average winning time contests: contestant. for the Regular Texaco event is about AIRPLANE b. Fuel shall be o f gas and oil mixture. 52 minutes. a. Themodelmusthavebeendesigned, c. Fuel allotment formula: Ά ounce

58 The MODEL BUILDER of fuel per pound of airplane weight. Maximum fuel allowed: 1% ounces. WORLD WAR ONE d. Fuel tank w ill be drained by the Contest Director (or his representa­ MODEL ACCESSORIES tive) prior to official flights. 2 " SCALE MACHINE GUN KITS e. Fuel will be allotted by the Contest Director just prior to an official flight. ENGINE a. The engine displacement shall not exceed one (1) cubic inch. b. The engine must be os spark igni­ tion type, using coil, condenser and LEWIS breaker points. c. No modified “ modern” glow plug 6 " LONG engines will be permitted. AM M O BELTS d. No exhaust collectors w ill be allowed. SCALE PILOTS LE RHONE ROTARY ENGINE KITS FLIGHT AVAILABLE IN i AVAILABLE IN 1W a. Two (2) flights will be flown. The r , i '/j", 2- AN D 2" SCALES highest flight time of the two will AND 25/e" ENGINE CYLINDERS be counted. SCALES

b. All flights shall be rise-off-ground VINTAGE (R.O.G.) WHEELS c. A flight will be constituted when AVAILABLE IN I the model leaves the ground and 3Λ" THROUGH AVAILABLE IN 5" DIAMETER remains airborne for four (4) min­ VARIOUS TYPES & SIZES utes. d. The model may be guided by one SEND 25c FOR COMPLETE ILLUSTRATED CATALOG wing tip on take-off. It shall h \ í l l í \ M 5 DEPARTMENT MB · 181 B STREET otherwise be unassisted. e. The timer will follow the aircraft SAN MARCOS, CALIFORNIA 92069 as necessary to keep it in sight. The contestant will furnish trans­ wen.) are basically built up from O.S. Max portation. The Old Ruler event that followed parts, with Bruce machining the rest f. Flight time will end when the the Texaco had to be one o f the wildest to make a truly beautiful engine. The model goes out of sight (O.O.S.) flying events this writer has ever entered. case has been finished in a black crinkle or lands. Just as the Dawn Patrol was ending the finish, thus the name “ Black Knight A ” , GENERAL wind came up and never stopped the rest and “ Black Knight B” , which should also a. The contestant has the burden of of the day and when we say wind we give you a hint as to their engine classes. proof in validating the age of the mean wind. It was reported that it got Bruce also produces several other con­ design. up to 45 MPH before the day was over verted glow-to-ignition engines, including b. AMA membership is required to and OOS flights of under 3 minutes were Cox .049, .09, and ,15's! These engines, enter. not uncommon. And they consider that with plug, cost a little over $30. Send a c. Situations not provided for by the a good contest day in England? stamped, addressed envelope for full above will be governed by SAM The contest brought out more than particulars to: Chandler Engineering or AMA rules. just contestants and airplanes. Bruce Co., 7858 Farralone Ave., Canoga Park, (Back to jack) Chandler, of Chandler Engineering Co., California 91304. It was our pleasure to have timed brought out a couple o f new ignition One more engine that came to our Chuck Partch on his winning flight, at engines he is going to produce. They attention was a home made original the 1973 Texaco Event and to show built back in 1941 by Larry Jenno, which how exciting even just timing can be, he was flying in a Megow Ranger. As the plane took us on an eight mile chase the photo shows, the engine is quite from the launching point. There have original and good looking. When running, been several flights over the last few years the engine almost sounds like a diesel that have ended over twenty miles from rather than ignition. Larry started the the takeoff point, so unless you have engine back in 1940 while attending unlimited flying space, it can be a little trade school. He originally intended the risky. (F o r re stricte d areas, an R /C engine to be a side port like the Texaco could be held, using verified Ohlsson, but then in 1941, when the designs, but allowing .60 gio engines Cannon came on the market, he changed with, say, 30 second engine run, rudder- it to side shaft intake, as it is now. Larry elevator-engine cutoff control, timers ended up running the engine in on a he'id position, and bonus points for initia l lathe to get the piston free enough and touch-down in a 25 foot diameter circle — seated in so that it would run. The

The MODEL BUILDER 59 NOW AVAILABLE! NEMESIS II COMBAT FOR SERIOUS COMBAT FLYERS ONLY! HOWARD RUSH'S FANTASTIC, SUPERTIGRE .35 POWERED. NATIONAL CHAMPION DESIGN, REPRODUCED IN KIT FORM TO BE EXACTLY LIKE THE ORIGINAL. DESIGN

* SUPERIOR CONTEST BALSA. SAME WEIGHT AND GRAIN AS SPECIFIED BY THE DESIGNER. * THIS IS NOT A MASS-PRODUCED KIT! IT IS MADE UP IN SMALL, CAREFULLY INSPECTED BATCHES, COMPLETELY MACHINE CUT. * ABSOLUTELY NOT AVAILABLE THROUGH HOBBY SHOPS. ORDER BY DIRECT MAIL ONLY: SENDCHECK OR MONEY ORDER.

• ADD 10% FOR POSTAGE. PRICES: SINGLE KIT $6.50, DOUBLE KIT $12.00, TRIPLE KIT $16.00. SATIFACTION GUARANTEED.

DICK MATHIS AERO DESIGN GROUP 1222 BRIARCOVE DRIVE, RICHARDSON, TEXAS 75080 ATTN: DICK MATHIS last lime the motor had been used was C ounter...... Continued from page 7 Stand-off scale WWII R/C model. The in 1945, and when he tried to start the llitc C ity” , 9486 Sandusky Ave., Arleta, subject is to be the Spitfire, and the engine again after 25 years it fired up California 91331, are now marketing, plans will show several different versions on the third flip . . . Larry said that the among other things, a partial kit for that may be built from the kit. only time he came close to losing the the Class B-C-D Satellite 1000. This joe and Dave have over 60 combined engine was during a typhoon o ff the “ Biggun” spans 83Ά inches and carries years of modeling experience, so their coast o f Okinawa while in the Navy. 1021 projected square inches of wing products should be well accepted. The The engine has a displacement of .14. area. Spitfire is due to be out about mid­ The kit is partial in that it consists summer. totally of full size plans ( with complete * * * wing layout) and 130 pre-cut balsa and Janick Model Engineering, 32 Farley plywood parts. A bill of materials is Road, Scarsdale, N.Y. 10538, is offering supplied for all required straight wood. a series of Peanut Plans. For full particu­ Those pre-cut wood parts are not to lars, see Fernando Ramos’ Free Flight be passed over lightly. Produced by Scale Column. P&W Model Service (Chuck Partch and * * * Gene Wallock), which is making partial jenEscoEngineering, 1649-1 W. Sepul­ kits for Old Timers, the quality of the veda Blvd., Torrance, California 90501, wood and the accuracy of the machine Phone 213-530-5244, is producing a cutting is perfect. beautifully made refueling manifold and The kit No. PK-1000, sells for $24.00 shutoff valve for all types o f gas-powered plus$2.00packingand postage (in U.S. A.). model planes, cars, or boats. Priced at Satellite City also markets covering mylar $5.95, the manifold/valve can be used in 1/4, 1/2, and 1 mil. thicknesses, and with or without pressure fuel systems, “ Hot S tuff” . . . a clear, non-toxic, one eliminates having to remove fuel, vent, TIP OF THE MONTH part, lOsecondadhesivewith the viscosity or pressure lines. Also eliminates risk Do you climb the walls trying to o f water. It is strong enough to have of flooding engine during refueling. figure out how to tie all those ignition replaced 1600 pounds of rivets formerly Only requires two lines from fuel tank. components down? Well, maybe this designed into the Boeing 747. Write to * * * will solve your problem; try bath tub the company for full particulars. Snappy Products, 16441 Vanowen caul king compound, such as Dow-Corning * * * Street, Van Nuys, California 92406 Silicone Rubber. )ust figure out where Dave Platt, well known scale modeler phone 213-988-1150, is producing a you want the battery box, coil, and con­ from England, and a designer for Top flight and tool box which will hold denser to go, squeeze out and apply Flite during the past five years, has up to two gallons o f fuel inside. The enough of a glob to hold each part, and resigned his position with Top Flite, and box features fold-up legs, three storage stick 'em to it. Let dry over-night with |oe Hancock of Ft. Lauderdale, drawers, fuselage supports, and very and you will have a permanent, shock- Fla., has formed a corporation to pro­ light weight. Box comes completely proof mount. If you ever want to replace duce kits and accessories. The new assembled, including all hardware, for any one part, a good hard tug w ill free company, Dave Platt Models, Inc., is $39.95. Without fuselage supports and it. We have found that if you break the based al 1300-C West McNab Rd., legs, but all hardware, price is $29.95. glaze on each part with 80 grit sand Ft. Lauderdale, Fla. 33309. Dealer and jobber inquiries invited. paper, it helps the compound to hold a The first product by the company, * * * little better. # not too surprisingly, will be a kit for a The Harbor Tug “ Douglas Greg” is

60 The MODEL BUILDER OAKCKAFT e á tre l 1 9 Proven — Highest Performance Model Sailplane currently available

1st Place'WWRpJI National & Regiorraí Goi

aJéuliíítóř i

írtgtH '. .. <\ ·. ' 49.5 in. .. .·’ ····*' · >'Λ * * »ight.\. , λ . />. 50 oz. min. ng Loading' &5 e fe .V .1 ^ oz7sq- ft.

■. t k.t.·. > .v. Amiable only from / * 'Qualitý-X/G Seif plaffe- '. / · ^W T O 7J.& 44-^ the latest molded fiberglass offering by separately. In addition Kirn-Kraft stocks indi­ Hartman Fiberglass R/C, Argenta, III. Hallum Racing Enterprises Inc., is the vidual replacement parts for Tee Dee 62501. Designed by Clayton Thomas, name given to a company recently .049/.051 engines. K-K also markets the tug is 42 inches long, 1154 inches formed by Chuck Hallum, well known the very fast !4 A Proto (Profile) across the beam and displaces 33 pounds. R/C race car competitor. Plans are to TORKV for $10.00 postpaid. No Complete kit, including hull, deck, and manufacture quality car components for C.O.D.’s. Mail order only. superstructure of molded fiberglass, sells the scratch builder and/or the enthusiast For further info on the 1973 Cox for $ 135.00 plus shipping charges. desiring to improve his stock kit car. Tee Dee ,049’s, read Dale K irn’s pre­ Catalog o f entire line is available for Currently, plans do not include the liminary report in this month’s Control $1.00, refundable with any order. production o f a complete car kit. Line column. * * * * * * First item from HRE Inc., is a cradle mount for the K&B Beco .19. Machined J(Jim). L. White, 19372 Worchester Dodgson Designs, 2904 So. West from T-6 aluminum alloy, the HRE-10 Lane, Huntington Beach, Calif. 92646 Camano Drive, Camano Island, Washing­ cradle mount is designed to mount the is offering beautiful, handmade towline ton 98292 produces the Todi (Toe-Dee), engine both at the mounting flanges parachutes for R/C gliders, suitable for an R/C Glider that has many features and at the thrust bearing housing, forming winch or hi-start launching systems. The separating it from the usual types. an integral unit that can be quickly bol­ canopy is made of tough, light, nylon Most immediately noticeable feature ted into the car. Unit also permits quick sail cloth, in high visibility colors. There is the 3 foot long flaperons. Operated by engine changes in the field in less are eight nylon twine shroud lines, four a flap-aileron coupler which is included than four minutes, including gear align­ of which are continuous from one end in the kit, but which may be purchased ment and backlash adjustment. to the other. A t the top, the four lines separately for $3.00, the flaperons may Mount is priced at $8.95, and is are formed into a loop to take the tow be moved simultaneously, down to 5 or available from HRE Inc., c/o Omni ring. A t the other end, all eight lines are 10 degrees to produce an undercambered Industries, 17751 Skypark Circle, Suite braided into an "Anti-chafe” lead line airfoil, to 30 degrees negative for high E, Irvine, California 92707. Dealer to which the swivel and tow line are speed flying, outside loopsand sustained inquiries welcome. attached. Tension keeps the chute coll­ inverted flight. Naturally, the coupler * * * apsed during tow, and during the des­ also provides aileron action at any flap Kirn-Kraft, P.O. Box 224, Anaheim, cent, vent and gore shapes prevent ex­ setting. California 92805, now has the 1973 cessive floating. Price is $8.00 each, five Control to the flaperons is through Cox Tee Dee .049 and .051 engines in for $35.00. · ______an instant connect system which allows stock. K-K immediately improves the just as instant disconnect, without dam­ breed by subtle but significant mod­ Workbench . . Continued from page 4 age, in case of an awkward landing. ifications. name you can bring to mind. His Fuselage is composed o f a molded The KK-01 is the Tec Dee .049 accomplishments in modeling are end­ fiberglass pod and a rolled balsa boom with left hand crankshaft and Kirn- less, and his leadership includes past weighing under 4 ounces. Kit includes Kraft front needle valve assembly presidency of the AMA. 3 plan sheets, step-by-step instructions, ($13.50). But get this . . . formed canopy and pre-cut base, two The KK-02 is same as above, plus a Walt just recently settled in Ger­ pre-cut stabilizers, pre-cut rudder,vertical pressurized backplate and opened-up many, where he will be continuing fin, and materials to build both the short venturi ($17.00). his work for the Johns Hopkins Applied (7614 inch) and long ) 10014 inch) wings. KK-03 is the same as KK-02, but Physics Laboratories for the next few All hardware is also included, except with righthand crankshaft ($17.00). years. Naturally, he has sought mem­ hinges and push rods. Price of complete KK-04 is the Tee Dee .051 with bership in a couple of R/C clubs in or kit is $55.00. All parts may be purchased the same features as KK-03. near the city o f Heidelberg where he,

The MODEL BUILDER 61 VINTAGE 1-C FLANS and wife Joyce, are living. Both clubs have limited membership, and Walt H i - S t a r t was quizzed by one of them as to his R/C experience. They were worried COMPLETE ASSEMBLY that they might have to provide him S f t p b y - sa INCLUDING: w ith a teacher! CONSOLIDATED CATALINA Tell you what . . . Let’s all write O ESIGN EO ar- R.C ■ SWCITZgtt 100' - 5/16" O.D. Surgical Tubing p l a n s : 4 SHEETS 3 6 X 7 0 " letters to Walt which he can pass on to 400' - Heavy Duty (126 lb. test) the doubtful R/C club officers in FOR THE MODELER WHO LIKES THEM- Nylon Twine ALL RIBS g, FULL FORMERS Germany; The address is Dr. W. A. SHOWN ON PLANS. b ig / Stake, rings, swivels and reel Good, Headquarters, USAREUR, (OVER 5 0 OTHER PLANS) $25 POSTPAID DCSOPS, APO New York, N.Y. 09403 t r y o n e t o d a y ...... Plans $ 12.00 READY TO DELIVER No need to lay it on thick . . . just Check or Money Order NIC W CATALO G 0 5 $ D C A L L P j W t l C O M E - mention the fact that you have some SID MORGAN DEALER INQUIRIES INVITED RON KOPP “vague recollection” about this guy 13157 Ormond. Belleville.Mich. 48111 8010 W. Waterford Avenue who won the R/C event at the 1938, Milwaukee, Wise. 53220 ______1939, and 1940 Nationals, who came up with TTPW (The first non-inter- acting proportional rudder and elevator control system), and a few other odds and ends like that. After all . . . don’t we owe him the favor? SOARING NATS CORRECTION Since our mention in last month’s workbench column, the 1973 R/C Soar­ ing Nationals has changed date and location. Word now comes that the contest site is Lewis College, Lockport, Illinois, and the dates are July 23, 24, and 25. Some accommodations (also co-ed) will be available on the college campus right next to the flying field. Write to Dan Pruss, C.D., Box 49D, Plainfield, III. 60544, (or phone 815- 436-2649) for a complete contest info, pack. Entry is by pre-registration only, and forms will not be accepted unless postmarked June 1 through June 30 (You vill rregister on time if you vish to flugen in das contest!) There will be Junior and Senior/ open classes (combined for scale), also standard (100 inch wingspan or less) and open (any wingspan) divisions. Team awards w ill also include Junior Team competition (see end o f R/C Soaring column for additional info). HELICOPTER BASEBALL Can you stand on the pitcher’s mound of a regulation baseball diamond and fly an R/C helicopter around the bases starting at home plate, making a spot landing at each base as you go, and touch down again at home plate in four minutes or less? If you can, you will qualify for the formal competition in Orbit Electronics’ Invitational Helicopter Competition to be held in cooperation with the MACS Do you have 0ne that smelle trade show on June 29 and 30, 1973. Competition will take place at nearby La Palma Stadium, with top winners like balsa, wood 9" being invited to fly an exhibition on Sunday, July 1, for the MACS show

62 The MODEL BUILDER at the Anaheim Convention Center. Write to Contest Director, Orbit CLASSIFIED ADS Electronics, 1641 Kaiser Ave., Santa Non-commercial: Rate is 25 cents per word with a minimum of $3 00 worth. Ana, Ca. 92705 for registration forms. Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No mail-order discount house ads knowingly accepted. The R/C Bee’s club of Placentia, Cal­ All ads are payable in advance and may be for any consecutive insertion period ifornia has volunteered to man the specified. Name and address free. Send ad and payment to: The MODEL BUILDER. competition, and the $5.00 entry fees Classified Ads, 1900 E. Edinger Ave., Santa Ana, California 92705 will be donated to the club’s treasury. Model Engine Specialists, established 1946, "TOW/CHUTE", Designed for R/C Gliders, WHO IS IT? hop-up, chrome fuels, chemicals, engines, Controlled Fall . . . Strong and U ltralight. . . parts. 25 cents brings information. Franny's Stays closed during tow. Just for the fun of it, we’re going Chrome Speciality Products, 513 Vesta PI., to present one far-back photo per Reading, Penn. 19605. Ph. (215) 929-1169. J.L. WHITE 19372 Worchester Lane Huntington Beach California 92646 month of a frequent or regular con­ Peanut Scale Supplies: Plans, balsa props, wheels. Send stamp for list. Stan Fink, 80 tributor to MODEL BUILDER. If EIGHTEEN PEANUTSCALE PLANS. $13.95 Crest Dr., Eugene. Oregon 97405. you are the first to identify the indi­ Send self addressed stamped envelope for list. vidual, you’ll receive a one-year sub­ MODERNISTIC MODELS Kirtland Hardware & Hobby Shop, 9138 Rt. Box 6932 scription to MB plus a genuine, zinc- 306, Kirtland, Ohio 44094, (216) 951-2220. Burbank, California 91505 Specialists in R/C and headquarters for the plated, wire-haired cookie pusher. new QUARTER MIDGET PYLON LEAGUE. T ’ain’t fair if you’re one o f the guy’s relatives, but if you are, and Sterling Models (Best Sport R/C Plane), there will be heavy public exposure you can come up with an even older Sullivan Products (Best Sport Control for his hobby and sport in front o f a picture than the one we’ve published, Line Plane), Ransome Airlines (Best new audience . . . to the best of our we’ll do something much better . . . we model o f a Pitts Special as done in the knowledge this is the first time a w o n 't send you a subscription to the U.S. Aerobatic Team Colors), Philadel­ museum has undertaken such an exhi­ magazine! How can you beat that? phia Maritime Museum (Best Antique bit. We believe that the degree of 180 IS MAX Ship to 1900). participation by modelers in Aero- The above is the title o f a 16 min­ Entry to the Aero-Crafts ’74 show Crafts ’74 will have a direct bearing on ute color film made by the National is open to any AMA member in the Museum support and involvement in Film Board of Canada of the 1971 United States and Canadian members o f modeling throughout the country.” World Championships for Free Flight MAAC. Write for entry forms and ENGINE CLINIC at Gothenburg, Sweden. The film is prize categories to: There is a distinct possibility that currently being distributed in the Uni­ Aero-Crafts ’74 one o f the country’s leading engine ted States by: Film Incorporated, The Museum o f the Philadelphia specialists will be conducting a trouble­ 1144 Wilmette Ave., Wilmette, Illinois Civic Center shooting column in the MODEL BUIL­ 60091. Information we have does not 34th Street at Civic Center DER very soon. If you’ve got an indicate the rental cost or availability. Boulevard engine problem, be it R/C, U/C, or Write to Film Incorporated for details. Philadelphia, Pa. 19104 F/F oriented, drop us a card or letter EXHIBITION ANYONE? Some additional particulars: and give us the symptoms. Maybe we The Museum of the Philadelphia Proxy entries may be submitted can help . . . # Civic Center, and the AMA are co­ through a friend of the exhibitor living Index to Advertisers in the Philadelphia area. Museum staff, hosting a large scale exhibition of mo­ Ace R adio C o n tro l, In c ...... 58 del planes, boats and cars in the spring helped by Philadelphia area model C lassified s...... 63 of 1974. clubs, will prepare entries for exhibi­ Dumas P roducts, In c ...... 55 This may seem like extra long dis­ tion. E.C.S.S...... 54 tance planning, but consider some o f No entry fee. A ll entries will be Fiberite Co ...... 54 the trophy sponsors: The museum submitted to the jury for prizes and Gee Bee L in e ...... 54 itself (most outstanding craftsmanship), inclusion in the exhibition. Carl Goldberg Models, Inc ...... 2nd Cover KLM Royal Dutch Airlines (best Fokker To quote Robert Nobel, curator, W.C. Hannan ...... 50 Heath C o m p a n y ...... 5 7 Aircraft of any year), TWA (Best model “ As a museum there is interest in FH W hee ls...... 45 of a TWA Aircraft in show), Naval presenting modeling as an art form, K 8 . B M fg ...... 48 Aviation Museum (Best model o f a demonstrating that craftsmen are very K ir n - K r a ft...... 52 Navy or Marine plane, any year), active in the U.S. For the modeler, Ron K o p p ...... 62 K ra ft Systems, In c ...... 1 MOVING? SEND NOTIFICATION FIRST! Marlow Engineering ...... 45 NAME Dick Mathis Design G roup ...... 60 OLD Model Rectifier Corp. (MRC) .. . 4th Cover ADDRESS ADDRESS Sid Morgan (Vintage Plans)...... 62 (Please P rint) CITY STATE ZIP Royal Products Corp ...... 3rd Cover RS S y s te m s ...... 5 3 NAME S atellite C i t y ...... 49 NEW Sig M fg . C o ...... 1 ADDRESS ADDRESS Sterling Models, Inc ...... 46, 47 (Please Print) CITY STATE ZIP Su-Pr-Line Products ...... 51 Tatone Products ...... 52 Change of address notices must be received one month before date of issue that new Vortex Model Engineering ...... 56 address takes effect. Send old address w ith new; old label preferred. Post Office w ill not forward copies unless you pay extra postage. Duplicate issues cannot be sent. W illiam s B ro th e rs ...... 59 W indspiel M o d e ls ...... 61 The MODEL BUILDER, 1900 E. Edinger Ave., Santa Ana, Ca 92705 Earl Wolsleger...... 5 8

The MODEL BUILDER 63 No. 12721 DON QUIXOTE $3.00 No. 6723 CALIFORNIA COASTER $3.50 An 85" span R/C glider of classic lines. All sheet balsa R/C soarer featuring a 9 PLANS AHEA Easy to build. By Dave Thornburg foot Jedelsky wing. By Mat Tennison No. 12722 TOAD $3.00 No. 5721 SEAHORSE II S3.75 D One-design pylon racer for .40 engines. Excellent trainer, designed for land or Also fo r spo rt fly in g . By R /C Bees sea, 19 to 35 pow er. By George W ilson

No. 12723 FORTY-NINER $150 No..5722 HUMMING BIRD $3.00 Great little all sheet balsa F/F sport rub­ Radio controlled F/F Scale early English ber model Span 24" By Dave Thornburg lightplane, .049. By Walt Mooney FULL-SIZE PLANS No. 11721 TORKY $1.50 No. 5723 WHETSTONE $1.75 (with instructions) Half-A Profile Proto U-Control speed Half-A Combat ship to sharpen your re­ SERVICE *3 model. Great for Juniors. By Dale Kirn flexes for contests. By Steve Fauble No. 11722 SEAGULL $4.50 No. 3721 YANKEE GULL $3.75 R/C flying boat-amphibian for .29 to Expandable R/C soaring glider with 8’- .45 engines. Span 27" By Neil Whitman 4" to 12’-0” wing span. By Le Gray No. 6731 WACO YKS-6 S3.50 No. 3722 MISS COSMIC WIND $2.75 Winner of 1972 Nationals F/F Scale Gas No. 11723 SKYRAIDER AD4B S1.50 Contest winning Quarter Midget racer. event. Span 33-1/4". By Bill Warner. Rubber powered, 27-1/2 inch free-fIight scale. Great flyer. By Walt Mooney Fast, easy b u ild in g . By Fred Reese No. 6732 DRAGGIN' FLY S3.50 Lightweight R/C glider for thermal soar­ No. 10721 STEPHENS AKRO S4.00 No. 3723 SIEBEL Si 201 $1.50 ing. Wingspan 7 feet. By Duane Hyer. R/C Standoff scale of popular aerobatic All sheet balsa profile freeflight scale for ship, for .35- 40 eng. By Brad Shepherd .020 power. By Jack Headley No. 673-OT ALBATROSS $3.75 Class C gas ship designed by George No. 10722 MINI - FAI $2.00 No. 2721 MINNOW $250 Reich. Redrawn by Phil Berhardt. High performing .010 powered miniat­ Control-line Profile Goodyear racer, ure F/F. Only 24" span. Loren Williams "Cosmic Wind." By John Penhallow No. 6733 HUNTINGTON H-12 $1.50 Rubber scale model of first US home- No. 9721 COLEEN-12 $3.00 No. 2722 FOKKER E-Ill $3.75 built. Span 19". By Walt Mooney. Graceful 8 ft. V-tail soarer has slope or WWI R/C scale for .60 engines. Rudder, thermal wing plans. By Randy Warner elevator, and throttle. By Berni Huber

No. 9722 BABY BOOMER $1.50 No. 2723 E-Z BOY $2.75 Twin-boom sport free flight pusher for Half-A competition free flight for '72 No. 5731 BANTEE S3.00 .020 power. By Art Reiners A .19 powered mini-pattern ship for 2 or rules and all modelers. By Al Vela 3 channels. Span 48". By John Chapis. No. 9723 LITTLE TOOT $3.50 No. 1721 SHOCER $350 Semi-scale R/C bipe for 40 engines. No. 5732 WOODWIND $2.50 Hot Class A/B Free Flight contender for Great performer' By Denny Elder A/2 glider with sturdy, warp-proof, all­ 1972 Rules. By Mel Schmidt sheet wing. Span 78". By John Krouse. No. 8721 BONZO. R/C $3.25 No. 1722 PUSS MOTH S3.00 Semi-scale model of Whitman racer, for No. 5733 TEA KETTLE S1.50 Chet Lanzo's famous rubber F/F scale Form II, FAI, Open, By Fred Steffen Twin-boom pusher for the Brown CO2 Puss Moth returns! By Hal Cover engine. Span 15". By Daniel Walton. No. 8722 COUNTERFEIT, A/1 $3.00 No. 1723 WHITE TRASH S3.00 No. 573-OT-1 AERB0.020 $2.00 High performance competition A/1 Nor­ A proven, trophy winning R/C sailplane Replica of 1941 Class A Nats winner. dic flying wing glider. By Bob Provart with 7 and 10 ft. span. By Rick Walters Span 30". Redesigned by Phil Bernhardt. No. 8723 TAYLORCRAFT. F/F $1.50 No. 12711 CURTISS-WRIGHT JR. $3.50 Rubber powered. 24 inch scale seaplane. Two inch scale model of famous pusher No. 4731 BRIEGLEB BG 12 $3.00 An excellent flyer By Walt Mooney light plane. R/C By Ralph Fidance Easily built 100" scale sailplane for slope or thermal soaring. By Chris Christen. No. 8724 SHOESTRING. R/C $3.00 No. 12712 TWIN TRAINER $3.00 Easily built Quarter Midget racer, fits Sport R/C model for two .30 to .50 No. 4732 ESPIRITU DE SAN LUIS $1.75 10% thickness rule. By Brad Shepherd engines. By Bill Northrop Single or 2-channel semi-scale using Sig 45" foam wing. By Dave Thornburg. No. 7721 FAIRCHILD 51 No. 11711 NANCY S2.75 One inch scale Classic for R/C, also F/F Scale-like, 96" span R/C glider featuring gas or rubber By H urst Bowers easy construction. By Jack Elam No. 4733 PEA POD $3.25 A 36" long R/C sailboat easily made of No. 7722 SAM 5 $2.50 No. 11712 BI-PRENTICE S2.75 1/8" Luan mahogany. Clever sail control. Top-notch competition Nordic A/2. Full Training type R/C biplane for fun flying. Full size patterns. By Tom Protheroe. wing plan. A winner. By Ron Evans Uses .29- 50 engines. By Bill Northrop

No. 3731 CORSAIR "F4U/C" $2.50 No. 7723 COMANCHE "C" S3.25 No. 9711 BEANPATCH $3.50 Profile scale C/L stunter for .40 engines. Quick and easy to build, 58" span stand­ An EAA scale-like model for sport R/C Jig-built wing. By Jack Sheeks. off scale. 40 power. By Jim Sunday 45 power. By Bob Upton

No. 3732 SATAN MK III $3.50 No. 7724 TRAVELAIR '2000' $4.00 No. 9712 FAIRCHILD 22 $2.25 High perform ance, 520 sq. in. Class A Two inch full scale Classic R/C biplane. Scale old-timer for single channel radio free flight. By Bob Beecroft. Proven flier, 60 power By Bill Northrop or freeflight .020 power. By Tom Laurie

No. 1731 SPROOSE GOOSE S4.00 No. 6721 WAKEFIELD $2.50 Price includes Third Class postage and EAA type R/C sport biplane, mostly Highest placing US. entry in 1971 reprint of building instructions. Add 35 spruce, for 60 engines. By Bill Northrop World Championships. By Bob White cents PER PLAN for First Class postage Add 50 cents for orders outside of USA No. 1732 SPECTRAL $2.25 No. 6722 MONGSTER $3.50 CALIFORNIA RESI DENTS ADD 5% TAX. Single channel R/C soarer, 57" span, Two inch scale quarter midget EAA type weighs 8 oz. Easily built. Andy McAfee biplane pylon racer. By Ed Nobora SEND TO: THE MODEL BUILDER PLANS SERVICE 12552 DEL REY DR. SANTA ANA. CALIFORNIA 92705

64 The MODEL BUILDER SPITFIRE! Royal has always strived to produce a line of kits that uncompromisingly combines scale beauty with fiyability. The Spitfire is í if E lV '™ no exception. This hand-cut balsa kit was scaled down from the famous WWII Spitfire which did much to repel the attack of the German Luftwaffe during the war and rekindled British hopes during their "darkest hour” . 73 For a truly unique R/C model, make the Spitfire your next scale project. See it now at your local dealer!

RC

Fuselage length: ...... 5 2 1/e "

W in g S p a n : ...... 6 4 V2 "

W in g A r e a : ...... 736 Sq. In.

Engine Size: ...... 6 0 -.8 0

Scale Ratio: ...... 1 3A " = y

All balsa and all scale ROYAL PRODUCTS Spun aluminum cowl CORPORATION

Hardware package included 6190 E. EVANS AVENUE, DENVER, COLORADO 80222 P rice : ...... $ 6 9 .9 5 Starting No N ot Every MRC W ebrals Called A Black Head Model Rectifier Corporation 2500 Woodbridge Avenue Edison, New Jersey 08817

Introducing the Speed .61 W ith čjinuerlé Parting T o p <9 Bottom

provid sport engine that exceeds thejpowor jautputof" fbrappeed 6li(l024 R/C) made in 60,engine^ )The modeler. Eeld Austria p -already _____ Jieing ■ · Wdbrai’s AiA6(fflx^Cf^rburetor insures i|l ‘bot“- enejforjjpefed and .power. —Hioptrbl affthis newr engine^s- trerhendo er riRS today’s Schnuerle porting system power levpl.reb-At At the-same _ time .this proven car ior fuel flow _____chám- buretór design „ retains anan- emci

add is to say that it’s all true. These thin basswood strips laminate easily using white glue or Sigbond for the adhesive. The outlines for this model were wrapped around a line of pins pushed into the plans to form a guide for the correct shape. The pins must not be spaced more than about an eighth of an inch apart Tom Stark's Free-Flight Rubber Scale winner of the 1972 Nationals, Benny Howard's classic "M r. Mulligan has now been kitted by Sig Mfg Co. to sell for $2.95. K it includes an 8-page building and flying instruction book. Wingspan is 20". in the sharp bend areas, and waxed paper over the plan is a must to keep the lamina­ tions from sticking down. You can cut out a cardboard pattern to laminate By FERNANDO RAMOS around if preferred, using masking tape FREE FLIG H T SCALE to hold the laminations to the form. This system has to be employed if you are using balsa wood for the laminations ®This month the Marlow Shark was Just roll yourfinger slowly o ff the surface. a straight, true framework. in the interest of lower weight, but Peanut Mister Mulligan by Hank Nixon, Vero Beach, Florida. completed, so I would like to cover a few When the covering is complete, instead Another idea for water shrinking light with basswood in the thinner sections it points dealing with the covering and of the traditional water shrinkingmethod, structures that may be new to a few isn’t absolutely necessary. I know of is to buy one of their ready- those shown on the plans. If you use flying of the model. As far as covering try using good old rubbing alcohol. (I readers is to place the covered wing or Standard assembly methods are used to-fly models and wear it out... finally balsa for the struts, use hard balsa and is concerned, Walt Mooney has discussed have used methyl and denatured ethyl tail in the freezer for several minutes. everywhere else. Simply make the parts salvaging the prop for use on the Hunting- stick to the plan thickness. The diagonal this in the last two issues o f MB and I ’ll alcohol as well). Why? Well, there are While cooling the structure, prepare a by pinning the outlines down over the ton. Any suitable plastic propeller isreally wire braces between the wing struts are only add a few remarks that may be of several good reasons. When you have a tea pot of boiling water. Remove the plan and then cement the cross pieces or OK. made from 4 pound test monofiliment help. light structure, the water could make covered framework from the freezer ribs in place. Don’t omit the gussets in Struts on the model shown were make fishing leader. The use of thinned white glue (60 it warp. Alcohol evaporates quickly and and pass it over the hot steam coming the corners of the surfaces. Without the of thin plywood and are thinner than Continued on page 49 percent glue to 40 percent water is a warping is all but eliminated. I have from the boiling water. Then pin it gussets the tissue covering w ill wrinkle in good mixture) may be new to modelers, found that applying the alcohol with a down on the workboard to thoroughly the corners for sure when it is shrunk. but it does work very well and reduces brush, as you would dope, does a dry. The theory here is, o f course, that Use the covering technique outlined the time it normally takes to cover any better job than spraying it on. the cold structure will not be affected by in last month’s Peanut Scale article to model. One word o f caution . . . the Once you have moistened the tissue, the hot steam, and will not warp. cover this model. thinned glue will penetrate right through pin the covered framework down to your While still on this subject, another Note that the landing gear wire is the paper and stick to your fingers. workboard to dry. This is best accom­ covering technique may be of interest. . . cemented into the fuselage but that it is This can be avoided by keeping your plished by using 3/32 or 1/8 x 1/4 inch pre-shrinking the tissue. This is done not cemented to the landing gear struts fingers moving while applying pressure. stock to raise the structure above the simply by taping the tissue on an open nor to the landing gear cross axle. This Should your fingers stick, don’t pull workboard. This permits air to circulate framework, such as a picture frame, will allow the wire to flex under load away or you’ll tear the tissue for sure. under the structure and still assures and then water shrinking the tissue. When without putting any of the load into the wooden landing gear structure. While this technique is not strictly scale, (the original airplane didn’t have a wire landing gear structure), it hardly affects the appearanceand is tremendously more durable. Details make the model, and there are several that can be used to advantage on this one. First, Fulton Flungerford’s wire wheels (FH Wheels) are used. I never cease to be amazed by their superscale appearance and their strength and durability. Williams Brothers' nose thrust button and cylinders are also used. After moistening the tissue, the parts are pinned down to a board to The completed Marlow Shark, ready for trimming test glides and avoid warps. Shimming parts off board allows air underneath. Alcohol first power flights. Fernando has substituted a plastic prop for the The propeller on the large version is by Bones of the larger Huntington H-12. Note built-up nose. Tail heaviness resulted in changing to evaporates rapidly, speeds up the drying process compared to water. machine carved prop furnished w ith the kit. Testors. The only way to get one that easier built block nose as shown on the plans.

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