NOVEMBER 1975

volume 5, number 47

UILDER S1.25 Kraft Systems is proud to announce our new Signature Series custom radio control system. Combining entirely new electronic design concepts with custom assembly and a cost-be-damned approach to component selection, it is the only choice for the NEW! serious radio control enthusiast. THE WORLD’S FIRST PROGRAMMABLE RADIO CONTROL SYSTEM

SIGNATURE SERIES

TYPICAL LAYOUT SHOWN. Panel label is engraved with MAY BE VARIED TO purchaser's name and date of manufacture. RETRACT LANDING GEAR - CUSTOMER REQUIREMENTS. SLOW ROLL BUTTON

Accurate Battery Voltage and R.F. Output Meters THROTTLE TRIM

ELEVATOR TRIM- DUAL TRAVEL AILERON

DUAL TRAVEL ELEVATOR - AVAILABLE IN DUAL AND Super precision instrument-type SINGLE STICK TRANSMITTER conductive plastic control poten­ CONFIGURATIONS. tiometers assure better than 0.1% resolution, less than 1% Open type control sticks are me­ non-linearity, and virtually unlim­ ticulously assembled to exacting ited life. Their very low friction tolerances. Stick lengths are ad­ design provides exceptional con­ justable. trol feel.

AUXILIARY NO. 2 · AUXILIARY NO. 1

RUDDER TRIM ‘ AILERON TRIM

Front panel slips off easily pro­ New multiplexed linear ramp en­ viding access to set up controls coder permits programming, is and adjustments. Controls can virtually drift free and gives linear even be adjusted in flight. control response. Customer may select location and function of programmable con­ These four switches determine trols. Each set is custom tailored direction of travel for controls to the individual’s requirements. specified.

Adjusts travel of rudder servo ap­ Four turn instrument quality pots proximately ± 10%. Dual rate provide smooth, precise adjust­ not available on this channel. ment. Γ These adjustments control both the These adjustments control the amount of servo travel. The Adjusts pre-determined control position selected by a push­ direction and amount of travel of the “ long" or normal position of the dual rate selector switch button control. This could be, for instance, a slow roll switch, retractable landing gear servo. Since may be adjusted for a variation of travel of approximately a spin button, or low speed throttle button. This control is over-all travel can be increased, a ± 10%. The short travel position of the dual rate selector customer specified. Push-button control selection may be special 180° servo is not required to switch may be adjusted to select a reduction of up to 50% requested as an addition to the dual rate controls. In other ensure positive locking action. from the long or normal travel. Servo neutral is not affected words, you may select both control options if desired. by these adjustments.

Limited production under the supervision of Steve Helms ensures meticulous quality and personal contact with the purchaser. Mr. Helms will also oversee repair service and follow-up.

SPECIFICATIONS SERVOS DUAL-CONVERSION RECEIVER Any of our standard servos may be Is a specially designed companion unit to the Signa­ Size: 2.6"x2.4"x0.8" · Weight: 2.6 oz. · Batt. Voltage: 4.8v nominal · Current Drain: 16 ma. nominal · No. of channels: 7 · selected. Each will be custom as­ ture series transmitter. A new, improved linear A.G.C. sembled and tested to ± 0.25% res­ and 11 pole piezo electric ceramic filter provide the Sensitivity: 1 microvolt nominal · Spurious Response: Image— 70db down; all others greater than 70 db down · Selectivity: olution and ± 1% linearity. most interference-free reception of any receiver on All servos are directly interchange­ the market today. It is the result of a continuous two- 3 db down at ± 5.4 KHz; 60 db down at ±8.07 KHz · All standard frequencies. able and only one direction of rota­ year design effort. tion is required.

WRITE FOR FREE CATALOG Worlds Largest Manufacturer of Proportional R/C Equipment 450 WEST CALIFORNIA AVENUE, P.O. BOX 1268, VISTA, CALIFORNIA 92083 FIRST CAME THE PACER-it started a whole new revolutionary category of model planes, the 1/2A pattern ship. Then people wanted a larger, fully competitive version with the same features--good looks, easy construction, sensible design, light weight, fuel economy, and solid performance at an affordable price. Here it is, the Super Pacer. For the economically minded pattern ship flier. All balsa and ply construction. Quick to build, light and sturdy to last long. It has to be a sin to get so much enjoyment out of the performance obtained at so little expense.

Try your dealer first. You can order direct if he doesn't have it.

Send me a Super Pacer. Enclosed is $32.95 plus $1.00 handling. Send me your complete catalog. Enclosed is $1.00 (add $.50 for 1st Class mail return.)

MB AC E l R /C .lIn c .) BOX 511, HIGGINSVILLE, MO. 64037 1” scale ofwinningest DRAG N FLY 40 MK II-HY2A unlimited hydro in the Gold A hot competition racing model for .40 engine. 36" long, Cup Circuit. Pickle-forked pre-cut birch plywood construction. Includes bow provides maximum plans (only) for realistic topside hatch control. Sturdy birch and to help keep water out and create a mahogany plywood con­ streamlined shape for top speed. struction. 36" long, for .40 HY-3-28” availab!e for engine. A good, basic com­ NEW- .20 engine HY-l-44” available petition hydro for .40 engine PAYn PAK PP-20 for .60 engine. This new stand-off scale model of the national unlimited hydroplane champ is 30" long, 15” beam, designed for .20 engine and radio control running. Rugged ply­ wood construction. A great performer. .. even for the beginner!

They don't come any faster, better designed, or better built. These kits are the leaders in stand-off scale as well as all out hydro-class competition. Stable and sure in the turns, and you can pull out all stops on the straightaway. ■ In calm or rough water, for fun or competition, Dumas has the easy riders . . . from hydro to deep vee. ■ Now available: Pre-packaged hardware kits with everything you need for running. Props for all models also available separately. A hardware kit for every model. See Your Local Dealer. If He Can’t Help You Write Us. See your hobby dealer or send 5CW for our complete catalog dumas

Dumas Products, Inc., 790 South Park Avenue, Tucson, Arizona 85719 CARL GOLDBERG The Best in Flying with...

VIKING-48” span. Hi-thrust for .049- Great CONTROL LINE MODELS, 051 engine. $7.95 from stable trainers — to stunt — to the exciting world of combat!

^ Well proven FREE FLIGHT CONTROL LINE MODELS MODELS, from simple to contest ships! SHOESTRING STUNTER-42” Top W1TTMAN BUSTER-40” Sharp stunt model for .19- 35 engine. stunt model for 19-.35 engine. FREE G14 $1 1.95 J RUBBER-POWERED MODELS, so G9 $11.95 easy to build, such fun to fly! FLIGHT MODELS RUBBER POWERED MODELS

U 'L Wl ZARD-Shaped balsa COSMIC WIND-43" span for wing, die-cut fuselage, 21" soar» for 049 engine. G5 $5.95 .19 to .35 engine. G17 $11.95 1/2A BLAZER— Die-cut balsa. 40” span, for 049 engine. G1 $6.95

SHOESTRING RACER-18" span All die-cut balsa. 0 2 $2.95

o

STUNT MAN 23-oTe-cul balsa BEAN-21*' span 23J4". lor .049- 09 engin·. Favorite 1/2A stunt model. For .049 Eng. 08 $5.50 G6 S5.95 RANGER 30-Die-cut balsa 30" RANGER 21— All die-cut balsa span, for .010- 049 engine. G2 $5-95 parts. 21” span beauty. D3 $2.95

€ SAFTI-FLITE 1 /2 A HANDLE l it t l e TOOT— Sporty Biplane, for SWORDSMAN 18-Die-cut balsa 18" 049 engine, all die-cut balsa span, for .020- 049 engine. G3 $5.50 Best handle made. G4 $5 .95 RANGER 28-M y ” pre-fab plus peper" Including lines, 28” span, 2 colors 05 $2.95 only 79c. HI

1/2A FLYING LINE Dacron Thread-5 6 It Strong, mm. stretch For small control line models, hinging, etc COMBAT HL1 25c P-40 FLYING TIG E R -18" span, all 1/2A BELLCRANK balsa pre-fab for 049 engine Ll'L SATAN-19" span, 1/2A and HORN Nylon G il $5.50 combat-stunt for 049 engine. CESSNA 180- The champion of provides smooth %A control line operation G12 S4.95 business liners. 21” span D4 $2 .95 Easy on dacron lines, too BCH1 25c

ENG. BRACKET for COX "290*' NEW! EB1 59c

LONG BOOMS! SPIRIT OF ST. LOUIS and NYLON HORN! A miniature duplicate, r ------VOODOO-36" combat-stunt JUNIOR SATAN-29” span, 21” wings pen. Q1 $2.95 I Carl Goldberg Models Inc. for 19- 35 engine. Single kit G13 $6 .95 combat- stunt, for .16 to .19 4736 W. Chicago Ave., Chicago, II 60651 Double kit DG13 $12.95 engines. G20 $5.95 I am sending 25c lor 8 pg illustrated Catalog with Basic Explanation ol R/C Equipment and Radio Control Definitions A ll ITEMS AVAILABLE IN CANADA Name ______For b u t service, see your dealer lor items you went H not eveilable. write direct: edd SOd per item IS I outside U.S.Í. Minimum order $1. Address CARL GOLDBERG MODELS INC. 4736 WEST CHICAGO AVE.· CHICAGO, ILLINOIS 60651 State.Zip -

NOVEMBER 1975 1 MODELS BUILDER presents the MASTER MODEL BUILDER Send all entries to: of the month MODEL BUILDER/PANA-VISE CONTEST 1105 Spurgeon St., Box 4336, CONTEST Santa Ana, California 92702 COLBERT INDUSTRIES, manufacturers of PANA-VISE, the unique hobby vise which turns and tilts to any position, in conjunction with MODEL BUILDER magazine, is sponsor­ ing a design competition for MODEL BUILDER readers. This monthly contest will be judged for originality and/or craftsmanship for all types of models (excluding plastic static scale). Entries will be judged purely on the basis of photo­ graphs and drawings supplied by the builder of the model. Emphasis in judging will be on originality, technical achievement, and craftsmanship, as found in the submitted material. A MODEL 301 PANA-VISE WILL BE AWARDED EACH MONTH TO THE WINNING ENTRY

3. If photos cannot offer sufficient information about the model, the construction drawings may also be submitted. Drawings should be dean, pencil draw­ ings with all pertinent dimensions indicated. A p rin t o f the drawing is acceptable. 4. A written description should be included with photos and drawings, explaining in fair detail any unusual features o f the design, and explaining any unique technical difficulties that the model may have achieved. 5. Please do not submit any designs that have been accepted for use in another publication. MOD­ EL BUILDER requests first option on publishing any submitted design. Payment for published designs w ill be at our regular rates. Any prizes awarded do not represent an agreement to publish any design. 6. Entries will be judged by the modelers on Requirements for entries: MODEL BUILDER'S editorial and art staff, and all 1. Any type model may be entered (aircraft, cars, decisions o f the judges w ill be final. boats, etc.). Kits may he entered if significant modi­ 7. Postage must be furnished if return of sub­ fications have been made to the stock k it m itted entries is desired. 2. Do not send the actual model. Send only black 8. Deadline for entries in the first contest of the and white photos, showing at least three views o f series is July 1, 1975, and winners w ill be announced the model. Include some familiar object in at least in the September 1975 issue. Subsequent entries w ill one photo to indicate the size o f the model. Try to be due the first o f each month and winners w ill be include photos o f any significant details. announced the second month following each dosing. This m onth’s winner is Capt. TOM NALLEN, F.A.C., Chicopee, Massachusetts. His entry is a rubber powered scale model o f the experi­ mental Curtiss XP-55 "Ascender.” This unsuccessful World War II design was of a tail-first or canard configuration, and as such, it ’s name, if pronounced with the right inflection, was very appropriate. The model was more successful than the prototype. Designed and built for the fabled Flying Aces Club’s Spring 1975 contest, it proceeded to take first place, using a combination o f bonus points (15 for low wing, 10 for pusher, and 20 for unorthodox), good scale points, and a best official flight of 36 seconds. As might be expected, the forward stab went through various modi­ fications, finally ending up as three laminations o f 3/32 balsa plugged into a 1/32 ply tongue. The 19 inch span model weighs 1.1 ounces, is covered with tissue colored with Floquil tinted nitrate, and is powered by two loops of 3/32 rubber turning a 7-1/2 inch prop. Best flight to date is 42 seconds. 2 MODEL BUILDER MODEL / NOVEMBER 1975

BUILDER volume 5, number 47

1105 SPURGEON, BOX 4336, SANTA ANA, CALIFORNIA 92702 (714) 547-3963

STAFF CONTENTS

EDITOR FEATURES Wm. C. Northrop, Jr. WORKBENCH, Bill N orthrop ...... 4 GENERAL MANAGER Anita Northrop OVER THE COUNTER, Bill N orthrop ...... 5 EDITORIAL ASSISTANT FOR MS. ONLY, Char Rohring ...... 8 Le Gray ASST. GEN. MANAGER R/C PATTERN WORLD CHAMPIONSHIPS, 1975, Bill N orthrop ...... 14 Dawn Garrott PRODUCT$ IN U$E, Taylor C o llin s ...... 21 ART DIRECTOR Paul Plecan R/C SOARING, Taylor C ollins ...... 22 SECRETARY CHOPPER CHATTER, John Tucker ...... 24 L. Gordon PLUG SPARKS, J o h n P o n d ...... 26 SUBSCRIPTION MANAGER

A. Valcarsel R/C AUTO NEWS, Chuck Hallum ...... 30

CONTRIBUTORS STRICTLY SAIL, R o d C a r r ...... 32 Rod Carr CONTROL LINE, Dan Rutherford ...... 34 Chuck Hallum F/F SCALE, Fernando Ramos ...... 38 Bill Hannan HANNAN’S HANGAR, Bill Hannan ...... 42 Walt Mooney John Pond FREE FLIGHT, Bob S talick ...... 46

Fernando Ramos PRODUCT$ IN U$E, Jean Andrews ...... 50 Dan Rutherford Bob Stalick SCALE VIEWS John Tucker DON QUIXOT, Modelar Magazine, Czechoslovakia ...... 20

ADVERTISING REPRESENTATIVES WEST: Bob Upton, 20626 Clarendon Ave. CONSTRUCTION Woodland Hills, California 91364 (213) 884-2294 1920’s NAVY FLYING BOAT, George Clapp 9 EAST: Walt Moucha, 38 Coppersmith Rd., Levittown, New York 11756 FOO 2-U-2, O.T. .020 REPLICA, R o n S h a r p to n /P h il B e r n h a r d t ...... 29 (516) 796-4898 TWIRP, D ave G ib s o n ...... 36 Subscriptions S I2.50 per year, S23.00 for two years. Single copies S I.25. Add S2.00 OKAY PEANUT, D o n B u t m a n ...... 43 for postage per year outside of U.S. (Except APO). Add 75 cents for Canada and Mexico. HALF-A “ LUNAR-TIC”, H a rry M u r p h y ...... 51 Copyright 1975 The MODEL BUILDER. All rights reserved. Reproduction without permission prohibited. Published monthly by MODEL BUILDER Magazine, 1105 Spurgeon, Box 4336, Santa Ana, Calif. 92702. Phone (714) 547-3963. Cover: Don't bother digging out your Post World War I Naval Aviation books, we've just Change of address notices must be received "discovered" a new modeling category .. "Composite Scale." This particular conglomer­ one month before date of issue that new ation was put together by George Clapp, Central Square, New York. It spans 6 feet and address takes effect. Send old address with lumbers along at "scale" speed with a Supertigre .40 rear rotor. See page 8 for the const­ new; old label preferred. Post Office will not ruction article. George was also indirectly the creator of Jeff Bradbury, who's holding forward copies unless you pay extra postage. the ship. He's George's No. 4 grandson! Kodachrome transparency by Mark Cowles. D uplicate issues cannot be sent. Second Class postage paid at Santa Ana, Ca.

NOVEMBER 1975 3 While in Germany, we visited the Graupner model company, in Kirchheim/Teck, for the second time in 7 years. On this occasion, we brought with us U.S. Team member Rhett Miller III, his mechanic .. . and father .. . Rhett. Jr., and AMA Pres., Johnny Clemens. Above: Mr. Johannes Graupner, a very gracious host, stands between Rhett Miller and MB's editor. We hold the "M o­ squito," a powered glider, and Rhett holds a Graupner Cirrus, built and flown by the late Howard McEntee, and donated to the Graupner collection by his wife, Elinor McEntee. •front Bii! /i tv o h • · • The bad news first. Beginning with The wing span and chord was 56 and This is not rumor, but fact, as supplied the January 1976 issue, MODEL BUILD­ 10 inches respectively, the airfoil not to us by John Yarger, president o f KGL. ER will increase its single copy price to quite full symmetrical. We also came C liffy becomes Vice-President and Gen­ $1.50. Subscription prices will become across a fair supply of the M.A.N. prin­ eral Manager, and was to assume office $15.00 for one year and $27.50 for ted plans, which we had purchased in on or about October 20, 1975. We wish two years, effective January 1, 1976. bulk. Until the supply runs out, we’ll him the best in his new location. If you’ve been thinking about subscrib­ sell these die-cut and drawing sets for a * * * ing, get your order postmarked before flat $6.00, including postage. If you The Remote Control Association of January 1, and take advantage o f the just use the wing parts alone, it could Central Florida, Inc., announces the 8th current rates o f $ 12.50 and $23.00. be a bargain. Address your orders to Annual Tangerine International R/C We won’t bore you with the reasons MODEL BUILDER Die-Cuts, Box 4336, Championships, December 27, 28, 29, for increasing the cost o f MODEL Santa Ana, CA 92702. and 30, 1975. Events will include For­ BUILDER, they're the same ones we’ve WE STARTED SOMETHING mula I, Sport Scale, A, B, DN, and DE given for previous increases . . . rising Our brief comments about AMA Pattern, and Sailplanes (Tasks I, IIA, prices of postage, paper, and services. Nationals history and the question of and I I I . . . Stand and Open classes). Of course, postage always catches most when it actually started, based on info Contact Clint Smith, 106 Hillcrest St., o f the blame, but we recall one case in from long-time modeler Bert Pond, Altamonte Springs, Fla. 32701, (305) New York City a few years ago where appeared in this column, July 1975 issue, 831-3492 for power events, and/or Stan it was the reverse. It seems that the has really stirred up some controversy. Pfost, 2110 Venetian Way (a blind alley Post Office employees found a rather So far, letters from Bob Meuser and no doubt), Winter Park, Fla. 32789, smelly package which was addressed to Jim Noonan would seem to confirm that (305) 628-4298. the city dump. Upon investigation, it the 1976 Nats just might be the 50th, and * * * turned out that a bachelor resident o f if it is, there probably ought to be more The Fourth Annual Miniature Air Ex­ an apartment had found it was cheaper made of it. po will take place on November 29 and to mail his small amount o f weekly gar­ We're cramped for space this month, 30, at the Registry Hotel, 7901 24th Ave. bage to the dump than it was to pay because of our extended ranting and South, Bloomington, Minnesota. For re­ the trash collectors to TAKE IT THERE! raving about the R/C Pattern World gistration and display information, con­ BAR FLI, ANYONE? Championships (Next month is “ equal tact Miniature Air Expo, Inc., 1458 In the process of making our recent tim e” for free flight. We’ll have a report 97th Ave. N.W., Coon Rapids, Minnesota house move, we came across several car­ from team member Don Chancey on 55433, (614) 757-1554. tons o f die-cut balsawood. The majority the F/F Championships in Bulgaria), so The corporation is made up of 441 of it turned out to be complete sets of we’ll give you a run-down on the Nats members, all from model and aero clubs die-cut parts for Phil K raft’s Bar Fli, a history thing in a future column. It’s a in the Minneapolis area, including C/L, design which was published in the Aug­ sorta fascinating. F/F, R/C, IMPS (plastic modelers), and ust 1968 issue of M.A.N., at which time BULLETIN BOARD American Aviation Historical Society we were the R/C editor. The die-cuts Cliff Weirick, formerly of Kraft Sys­ chapter members. were a little side business we had going tems, Inc., will join the staff o f KGL * * * at the time. Model and Supply Co., 6787 Wales Rd. The good news? This is the end of The Bar Fli was a trike-geared pattern N.W., P.O. Box 2482, North Canton, the column! Have a pleasant Thanks­ ship, on the small side, but .61 powered. Ohio 44720. Phone (216) 494-5583. giving! wen. ·

4 MODEL BUILDER OVER THE COUNTER

Sig's "Twister", C/L stunt ship for .29 to .40 engines. Astro Flight's R/C System Analyzer/Rapid Charger.

• Need a pilot for that new Messer- schmittor Focke-Wulf? Aircom Ltd., Box 302, Bloomfield Hills, Mich. 48013, has just what you need. Its first offering is a 1-1/2 inch scale World War II L uft­ waffe fighter pilot. Molded from a light­ weight plastic material, the full figure pilot features incredibly complete detail, including parachute, goggles, life jacket details, flexible oxygen hose and mask, compass, parachute belting and boot straps! Each kit is packed in a four color SEMCO long shank drill bits. blister pack with color photo views of the actual model. Each pilot figure comes with authentic archive photos and descriptions suitable for contest re­ ference. Aircom has other pilots in the development stage, including American and R.A.F. figures. The Luftwaffe pilot is available now from your dealer or direct from Aircom, Ltd., priced at $12.95. SEMCO 1/4-32 drill bit and tap set.

Astro Flight's Astro-10 Marine power system. SEMCO 1/4-32 die (glow plug thread size).

NOVEMBER 1975 5 -lit ciieetcf·^

Airborne pack voltage analyzer by Cyt-4 Industries. "Cheeter-Stiks” by Sonic-Tronics. Gfo'DiVtl

"Series F ifty" scaled-down Powerhouse for R/C by Cal Aero-Model.

CYT-4 Industries is marketing a clever a 1/4 inch hole in the fuselage side. electronic ‘‘gas gauge” for use with R/C Many versions of the Power Cyt are transmitter and receiver battery packs. offered, depending on voltage and the This 1 /8 ounce unit utilizes a light emit­ type o f battery being monitored. For ting diode (LED) that glows brightly more information, contact Cyt-4 Indus­ New "Glo-Devil" glow plugs by Sonic-Tronics. while the radio is operating. The sensing tries directly, at 617 South East Ave., circuit in the unit measures the voltage Oak Park, Illinois 60304. balsa profile fuselage, die cut ribs, die put out by the battery pack, and when * * * cut doublers, and pre-bent push rods the voltage drops to a critical level, the Sig Mfg. will soon be marketing Mike and landing gear. The 490 square inch LED goes out, indicating that there is Gretz’s control line Twister. This 48 Twister is designed to be powered by approximately ten to twenty minutes o f inch span profile stunt design w ill fea­ .29 to .40 size engines. Watch Sig adver­ power left in the battery pack. The LED ture coupled wing flaps for precise ma­ tising for availability and price. bulb is mounted in a snap-in plastic neuvers. The· kit will be of the usual Sig * * * housing which can be installed through high quality, and will include a shaped ‘‘For any type o f linkage hook-up

Tatone muffler for .19 powered R/C race cars. World War II Luftwaffe pilot to 1-1/2 inch scale, by Aircom Ltd.

6 MODEL BUILDER TO

-Γ V

The Ball Links are available in four configurations. One version comes with a 4-40 thread on the shank o f the steel ball for use on bellcranks, servo output arms, steering arms, etc. Another version uses a rivet in place of the threads to attach the steel ball permanently. A third version has a female 2-56 thread to allow the link to be used on the end of a conventional pushrod. The fourth version has a female 2-56 thread on each Ball links, in four configurations, by Du-Bro. end to allow two take-offs from a servo, such as is needed for aileron installations. Ball-Driver wrenches for Allen head bolts, from BWT Systems. . . . corrects for any misalignment and The single take-off links retail for $.85, eliminates binding” . . . such are the and the dual aileron link sells for $1.00. All are available from your hobby dealer two servos for aileron and elevator is claims for Du-Bro’s new Ball Links. or direct from Du-Bro Products, Inc., 20 ounces. The kit is delivered with foam These unique replacements for the con­ 480 Bonner Road, Wauconda, Illinois wing cores cut to size, motor mount, ventional control clevis use a molded 60084. and spinner, for $23.95. nylon hollow ball which snaps over a * * * * * * steel ball, similar to a ball type trailer Span Aero Products, Wildwood Lane, A time-honored nemesis o f modelers hitch. The swiveling action of the link Norwalk, Conn. 06851, ran A rt Schroe- has been solved by Wilhold Glues, Inc. allows for considerable misalignment in der’s famous Eyeball design through There has never before been a neat, the linkage without binding. Since the the dryer and shrank it down to an simple, and strong way to glue plastic links snap on and off, they are ideal for Eyelash. This 42 inch 1/2A performer canopies to wood or fiberglass fuselages. linkages that must be removable in order uses a foam wing and two channel con­ Wilhold’s new R/C 56 Adhesive is speci­ to disassemble the plane . . . such as trol to do maneuvers not thought pos­ fically designed for this purpose. The spoilers on gliders, for instance. sible with a small airplane. Weight with Continued on page 83

The "Eyelash" for .049 engines, by Span Aero.

NOVEMBER 1975 7 'John, are you trying to sneak another airplane kit into the house?"

(Mrs.) CHAR ROHRING 4494 Tanglewood Trail Saint Joseph, Mich. 49085

• Christmas nears, and once again all we could lend the extra one to a friend the evening. Only the ones with a small R/C families can look forward to that . . . who is using her mother-in-law’s ster­ “ R/C” on the gift tag get saved for night when the modeling gear must be ling embroidery shears to cut chicken last. Then the rest of us go to bed. put away to make room for the tree. parts. We don't think ahead to realize The real wonder o f Christmas is that At our house, we call this joyous occa­ we could save that extra kitchen shears the modeler thinks any gift he gets sion “ All Hobby Eve.” Naturally, an to swap for a cheese grater at the annual should be used at once. If you give him R/C family might have other hobbies, garage Sell 'n Swap. Modeling is a hobby an Olympic kit on Christmas Eve, you'll too. Everything must be cleared away. where two is always better than one. If find him bleary-eyed in the morning It’s time to clean our house, anyhow. this isn’t so, how can your husband live almost ready to sand the wings. If you I came to that realization this fall when so contentedly with seven transmitters give him a new stopwatch, be prepared the kids in the neighborhood started on top of the hutch? to have everything you do checked out calling the family room “ The Digs.” If you want to be super secretive to the fraction o f a second. Who really All of us must pitch in and put stuff about giving the right Christmas gift to cares how long it takes you to brush undercover to make room for decora­ the modeler, you might try asking his your teeth, or to get the weather report tions and atmosphere. Dan’s TR-3 motor fellow club members. They know what from the Coast Guard station? must be moved from the coffee table. he needs, wants, and should have. I keep What we women need to do is ex­ Becky’s giant rug-hooking project could a Christmas list going all year. If Bill change some unusual hobby related gift go into her room. Even the two card mentions a wanted article, I jot it down. ideas. I'd like to offer checking your tables holding my innocent collection of Then when shopping time comes around, state license bureau to see if you can get bulletin board clippings have to be put I simply refer to the list. There were him one of those lettered plates for his away. On All Hobby Eve there are only 26 modeling items under B ill’s name by car. I saw “ I FLY RC” at the glider away. On All Hobby Eve there are only May! nationals. You could make up some­ two options. Change religions by Wed­ A t our house we give B ill’s gifts to thing like “ RC 4 ME” or “ POWER RC” nesday or start cleaning up the mess! him toward the end o f the festivities. or “ I DIG RC.” “ RC WHOPEE” is cute A t least buying holiday gifts for your The minute he gets a modeling gift he but I think it’s one letter too many. In modeler is no problem. It ’s nice to know has to unwrap it carefully, spread it out most states you’re too late now for the there are 5,000 items he needs. Flip the slowly, examine each section thoroughly, 1976 personalized plates. In Michigan pages of this magazine and let your fin­ hold the parts up to the light testily, the deadline for 1976 was June o f 1975. ger d.rop anywhere. He wants it. He smell any little bottles cautiously, read This year one o f my friends in Wis­ wants it even if he already has one. the directions completely, and rub the consin is giving a home-made coupon You'll never go wrong. With us women, box on his cheek. The celebration starts book. The coupons read something like we think one of everything is enough. to go downhill as he escapes into the this. “ Good, anytime, for one half hour For example, it doesn’t cross our minds Land of Planes. Other gifts don’t make of wing holding during final Monokote to have two kitchen shears. It doesn’t him carry on this way. He tears through smoothing. Smiles included.” Another occur to us to put a second shears in regular presents like a customs inspector. reads, “ Good for one evening o f abso- the picnic basket. We never think that We can give these gifts any time during Continued on page 67 8 MODEL BUILDER 1920's Navy Flying Boat This model looks just about like any Navy flying boat you might have seen back in the early 1920's (if you happened to be around at the time), and flies in the same lazy manner. By GEORGE CLAPP PHOTOS BY MARK COWLES • U.S. Navy flying boats of the World model, and the other with hull and out­ planes with rigging far more complicated War I and twenties era were many, and riggers to the empennage, such as the than this non-scale subject. varied greatly in plan form. There were Curtiss NC-4 o f transatlantic fame. But About 1964, M.A.N. published Ken two general types, one similar to our I think i t ’s safe to say that all were bi- Willard’s "Little Swell,” a monoplane flying boat. Right away, I saw the possi­ bilities of making it into a boat such as I had been thinking of building. The hull of a flying boat can take considerable experimentation and build­ ing trial and error before you hit upon the right design. After reading that this was Ken’s third try, I decided to stick with his hull design and blow it up two times in size. The rest o f the ship is my idea o f a composite o f all o f these great old Navy Flying boats. Also, it is o f great satisfaction to see it lumber along until it hits that last ripple and becomes air­ borne. It then cruises around with no great performance, much as those ships did. There is little doubt that it could stand a 60 for power, but 1 preferred the challenge o f a strong 40, such as the Super Tigre ball bearing rear valve it now has, for realism. HULL CONSTRUCTION The hull is quite simple to build, with 6 steps clearly shown on the plans. It should be noted that the top view lines represent the exact shape o f the top piece o f the hull. 1. Use the top pattern right off the

NOVEMBER 1975 9

12 FULL SIZE PLANS AVAILABLE - SEE PAGE 88 MODEL BUILDER Close-up photo of engine mounting.Note waterproof shield around throttle linkage where it comes up through the lower wing. "R ustic" cowling is very typical of early 20's era . . . certainly no problem with cooling. Note fuel lines from tank to upper surface of top wing. split to hollow out, then glued back Cement down sponge rubber, then be o f Phoenix, Arizona, who helped me together. Slot in top accepts one-piece careful not to get contact cement on with the construction of this airplane plywood struts. sponge when attaching membrane over while I was there, in 1967-68. This ship MISCELLANEOUS it. is over six years old and has dropped The struts, motor mount, cowlings, RIGGING from about 20 feet up after a stall (I got engine, dummy radiator, etc., are pretty Entire wire bracing is done with No. excited and forgot to extend transmitter much self-explanatory on the drawings. 20 monofilament fish leader. After in­ antenna) into the water, with the only damage being a missing windshield. This WATER TIGHTNESS stallation, it is heat shrunk. Make sure you get a line that will shrink. I had is the advantage o f building them like a This cannot be stressed too much. brick CENSORED (Shame on you, You will note the toy balloon neck some that would not, and had to replace it. George! wen). May you get as much around throttle exit. Also, good quality enjoyment out of building and flying it CONCLUSION sponge rubber around radio access open­ as I have. · ing covered with toy balloon sections. I would like to thank Harvey Saddler,

Our cover star, Jeff, gives us an underside view of the flying boat. The author poses in an appropriate background. The floats are rigged Ship is a slow and realistic flier with the .40 rear rotor Supertigre. on a Cessna 172.

NOVEMBER 1975 13 The airport at Belp. about 10 miles south of Bern Switzerland, scene of the 1975 R/C Pattern World Championships. At the far left, you are looking south, toward the Alps. Just above the nose of the Dan-Air transport is one of the flight lines. The huge tent in the center housed the displays, the team pit area, the cafeteria, and the dining space. The other flying site is off to the right, at the north end of the runway. 1975 R/C PATTERN WORLD CHAMPIONSHIPS Photos and text by • Have you ever seen an R/C pattern . . . the World Championships o f R/C ship perform a "Langsam-Eh Rollah,” Pattern which was held in Bern, Swit­ BILL NORTHROP an “ Ócho Cubano," or a "Sombrero de zerland, on September 8 through 13, week adventure, and just figuring out Toppa?” Did you ever hear a judge called 1975. how to start is bad enough, let alone a "Punkterichter?” (We’ve heard ’em This writer was fortunate in being trying to condense it into a single article. called just about everything else!) If you invited to be one of the ten judges to We’ll attempt to do it by chronicling haven’t heard of the former maneuvers, officiate in Bern, along with Tony Aarts our own experiences, as well as discus­ then you've never witnessed an R/C (Holland), Dave Henshaw (Canada),Egon sing the contest itself. First, the travel­ Pattern World Championships, and as Gstohl (Liechtenstein), Camille Gerard ogue. for the latter, the Swiss either don’t (Luxembourg), Walter Burger (Switzer­ Transportation to Europe was pro­ have a word for “judge” in their lan­ land), Loris Kanneworff (Italy), Pierre vided for the team members, the team guage, or they simply prefer to give Pignot (France), Owen Giddings (Eng­ manager, and this judge, by AMA, these hard-working pattern officials no land), and Heinz Freundt (Austria). Ac­ through the National Aeronautic asso­ grander a title than "point w riter.” tually, there were eleven o f us, as Joe ciation, and MATS. In our case, it meant The above introduction doesn’t even Dible was there from Ireland as a stand­ leaving an unfinished October issue begin the "foreign” flavor which charac­ by, if needed. (that’s why it was later than usual!) terizes world championship competition, It would be no problem to write a and having to come back as soon as and of course, the case in p u n k t. . . er book about all of the main and sideline possible, or not go at all . . . the choice ...p o in t is the Weltmeister. . . cripes features experienced during this two was obvious. We were accompanied on the flight to Frankfort, Germany by team members Mark Radcliff and Rhett Miller, and manager Don Lowe. Third team member Dave Brown had taken an earlier flight, with AMA President Johnny Clemens. Johnny and Dave, along with Papa Rhett (why couldn’t they have been Tom and Dick, or George and Harry, instead of Rhett and Rhett!?), who had flown in commercially on Lufthansa, eventual- ly(!) met us at the airport, having pre­ viously rented two VW Micro-Buses and one Bug. After cramming model boxes, suit­ Bruce Turner, New Zealand, w ith Manager A. Masetto, of Argentina, who finished 72nd. cases and people into the three vehicles, Tom Prosser holding his model. and making several excursions around

Emil Giezendanner, brother of former World Benito Bertolani, Italy. Team wives had a Defending World Champ, Tsugutaka Yoshioka, Champ, Bruno, Team Manager Kurt Muller. unique way of collecting autographs, on them! tweaks the needle.

14 MODEL BUILDER the U.S. Air Force portion o f the Frank­ way o f Schwetzingen . . . yeah. The next for his luke-cool Coke, the waiter finally furt Rhine-Main Air Base in search of a day, Johnny Clemens and this writer caught on and brought in a dinner plate place to exchange some U.S. dollars for drove to Heidelberg and spent hours with a large spoon, and planted in the German marks, we finally all lined up nosing around the city streets, the in­ middle o f the plate . . . one ice cube! up on the same autobahn (German ver­ triguing shops, and the fabulous old cas­ The following day we all went to sion of a Freeway) headed in the same tle. The streets and buildings are spot­ the club flying field so this writer could direction, and took o ff for Heidelberg. less, gardens and window boxes are full critique the team flying. What a field! There were several reasons for going of beautiful flowers, the girls are gor­ Many o f our clubs should be so fo r­ to Heidelberg; 1) it was on the way to geous and wholesome and appear to have tunate. The property, surrounded by a Bern, Switzerland, 2) it was too early no visible means o f “ support,” the beer low cable-and-post fence, was out in to arrive in Bern, because we flew over is cool and tasty and plentiful, and open country, bordered on two sides when MATS said “ Go,” and our hotel prices are so high they’re out o f sight! by small, two-lane gravel roads. The rooms in Bern couldn't be occupied for Dinner at the little See Hotel was third side was the entrance road, and several days, 3) Dave Brown had a mod­ excellent, and partaking o f it was a cere­ the fourth side was backed by a farm eler friend near Heidelberg who would mony. When young Rhett asked for ice field. The whole area was covered in find us a place to stay, 4) there were model flying fields in the area where the team could practice, and, 5) why not go to Heidelberg, it ’s a beautiful and historic spot! With Dave in the lead, the caravan arrived in Heidelberg and we got out and stretched while Dave called his friend in the nearby town of Ketsch. By now, we had discovered a heretofor unknown fact about Dave. . . he had been sta­ tioned near Heidelberg for part o f his hitch in the U.S. Army in the 1960’s, had joined a model club there where he learned to fly R/C, and had gained fair command o f the German language . . . well, let’s call it “ pigeon German” . . . but it worked, and we had us a built-in interpreter! Dave’s German modeling buddy, Her­ bert Fuchs (pronounced "Foooks” ) showed us to a delightful little hotel on a lake just outside o f Ketsch, which West Germany's Gunter Hoppe strolls over to Mark Radcliff, about to make first flight for was about 15 miles from Heidelberg, by his position in front of the judges. the U.S. team. Manager Don Lowe stands by.

Ricardo Fombella, of Spain. Concentrating on Rene Schumascher, Switzerland. Manager Pujo Stephansen, Norway, w ith ever present judging can be difficult at times! Muller, and time keeper W illy Boni. cigar, "winds up" his "Maximum II." NOVEMBER 1975 15 A cheery "Good morning, suh!" from Isao Ben Castaneda, Mexico, turns to announce his Matsui, president of I.M. Products, Japan. takeoff to the judges.

Jeff Tracy, Australia, sets his throttle before Louis Castaneda, Mexico, with his beautiful Ruggero Pasqualani, Italy, does a deep knee starting the engine. Looks like a Phoenix. daughter-in-law, with Ben's "D irty Birdy." bend while our friend Graziano Pagni holds. lush, close-cropped, championship golf sightsee. It is a most beautiful country. course condition, green grass, about j 00 If only one word were permitted to by 200 yards in size. In the center, but describe Switzerland, it would have to nearer to the fourth, and a longer side, be “ spotless," though Germany is sim­ was a smooth, paved strip, with painted ilar. I t ’s impossible to find an empty landing circles. Along that fourth side bottle, or can, or scrap o f paper lying was a club house with a porch and lat­ along the roadside, whether in the coun­ ticed pavilion outside. The club house try, or when winding through the nar­ contained tables and chairs, and a store row, picturesque streets o f the small room to keep that luke-cool beer and towns. coke. On the other side of the pavilion Well . . . please excuse the MODEL BUILDER Travelogue, but this writer was a shed-type building which housed Judge Owen Giddings, England. toilets, a storage space for the dub trac­ doesn’t have the opportunity of travel­ tor and mowing machine, and a semi- ing to a foreign land too often, and we work/storage room for models. How do can’t resist the temptation of telling you like that!? somebody about it. Wish you could have After watching each of our fliers and been with us, the two Rhett Millers, then having a group conference and dis­ and johnny Clemens, when we took a cussion on ways to score well at the cable car ride to the top o f the Schilt- championships, we left the team to their horn, 10,000 feel up in the Alps and practicing, and along with johnny, drove ate dinner in a rotating restaurant. It back to Heidelberg to look at some was 68° when we left the base, and more . . . e r . . . flowers. snow was blasting past the windows as Next day, Sunday, we left the team we dined on . . . to more practice, and drove on to Bern, Judge Camille Gerard, Luxembourg. Being a judge at a World Champion­ passing from Germany to Switzerland ships has its good and bad points. On in the city o f Basel. There were uni­ the good side; you get a free ride part formed guards at the border, but unlike way across the world and back, you get the movies and television, there was no free room and meals during the days of gate, no machine guns, no tense music, competition, and you have a front row and Claude Rains didn’t come out to seat on the scene of the action. On the check our passports! We stopped on the bad side; you are "chained” to your Swiss side and turned in our German duty from the very first through the marks for Swiss francs. The music in very last flight every day of the contest, the little exchange office was American you have to watch the same set o f 16 rock! maneuvers approximately 156 times or Once we were within about 100 kilo­ about 2490 all together, and score every meters of Bern, we left the autobahn, Judge Egon Gstohl, Liechtenstein. one o f them accurately . . . and worst of prefering to take the small roads and all, you have very little opportunity to

16 MODEL BUILDER c

Aria Goldberg, Israel, and team members. As a reminder of the ugly Sally and Dave Brown, with Don Lowe holding. It was chilly and outside world, their car was repeatedly checked for booby traps. windy during this flight. Shades of Hutchinson!

Canadian Garry Reusch applies the starter as his father, Brent, holds Rhett Miller, Jr., Rhett III, and Don Lowe, before Rhett's first flight on. They produce several kits w ith fiberglass fuselages. on Wednesday afternoon, the only complete day with good weather. meet and talk with the fliers or to exam­ smothered in fruit sauce, or what have Unfortunately for the judges, there ine and photograph their models. you. To wash it down, you drank beer, was no such thing as “ between flights,” As the fliers alternate from one flight wine or coffee. If you asked for water, and this brings up one complaint we had line ("Piste” in Swiss!) to the other in milk, or iced tea, you got a blank look with the organization o f this World succeeding rounds, each judge obviously . . . Oops, back to the models. Champs. Prior to the affair, it had been “ sees” each contestant for two of his Between flights was a great oppor­ indicated that each night, a different four flights. Even as a “ footloose” re­ tunity to meet and talk . . . or attempt hotel which housed contestants would porter, it would be hard to see more to talk to the contestants. Luckily, most be designated as the host for the evening, than that, even if you were equipped European and Far Eastern countries where everyone could gather. This never with a motorcycle to run back and forth teach English in their schools, and with happened, and it really was a shame, between . . . e r . . . pistes. And chances only a few exceptions, it was possible because once back in Bern each evening, are, there would be two hot fliers up at to communicate. As for those who spoke everyone went their own way. In con­ the same time, so you’d have to miss no English at all, sign language and uni­ trast, at the World Champs in Doyles- one of them anyhow. versal modeling terms bridged the gap. town, Pa., 1971, AMA held an open The worst part of judging at a World Championships... or we should say ... the most frustrating, is to be so close to all o f these modelers from all corners of the earth, and not have the opportunity to spend time with them and to learn more about them and the models they are flying. Between flights, the contest­ ants spent most of their time in the huge tent that was erected on the air­ port grounds. Inside, there was a fenced- o ff area with bench/tables for each team to assemble, park, and/or work on the models. Along one side were manufac­ turers display booths, and at the opposite end were tables, benches and a complete kitchen for preparing meals. In Switzer­ land, whether in daily routine or at an airplane contest, there seems to be no such thing as a snack, or sandwich. You sat down to a bowl o f hot soup, a plat­ ter of hot vegetables along with some P. Constantinos, the only flier from Greece. Flying in the rain, with an umbrella to keep kind of meat, and a dessert of ice cream Crashed shortly after takeoff on third flight. the transmitter dry, Paul Behm, Luxembourg. NOVEMBER 1975 17 Judge Tony Aarts, Holland. Judge Pierre Pignot, France.

The new World Champion, Wolfgang Matt, of Liechtenstein. Hanno Prettner, Austria, 2nd.

Semi-scale Spitfire, by Tore Paulsen, Norway, flew very well, and was one of fastest at the contest. We have a construction article coming on this one.

The Compleate Judge's Stand. It was too high to write on, but it sure looked nice! house every evening in a large banquet room of the one headquarters motel. There was much more opportunity to Geoff Franklin (left). Team Manager, and Keith Maundrell (rt.), pilot, of the British team. Sorry, but we didn't get the name of the mechanic holding Keith's plane. Some rain, huh Geoff? socialize and talk over the mutual prob­ lems of airplanes, engines, fuels, com­ judges and jury. The judges were didn’t suffer in takeoff or landing be­ petition rules, etc. In our opinion, these "warmed up” by having two unofficial cause of the two-wheel gear, and it sure gatherings are as important as the con­ pattern flights to score immediately looked impressive in the air. In fact, we test itself. prior to the first official flight. This talked Tore into a construction article Oh . . . the contest. . . you probably gave us the opportunity to "adjust our for sometime in the near future. thought we’d never get around to it. As sights” and more or less get used to the Next was Domenico Bruschi (71), we said, the opportunity of traveling to background relative to the placing of from the little Italian-speaking country a foreign land and meeting and talking the maneuvers. With only four flights of San Moreno, and we couldn’t help with so many fine people from so many per competitor, we’re sure the first few but feel that Bruschi and his teammates different countries, can easily outshine to fly appreciated the fact that the judges could have done better without their the competition itself. However, on with were "in the groove” at the very begin­ caller yapping at them constantly the flying, which started Wednesday ning. and tapping them on the shoulders morning, Sept. 10, 1975. Anyway, Tore Paulsen (41), of Nor­ while they were flying. He talked Jean Tonnar, (66 . . . number is final way, followed Tonnar’s less than average them through every inch o f every ma­ ranking) of Luxembourg, had the honor flight with an above average score. Tore’s neuver to the point that i t ’s a wonder o f being our first contestant. . . which aircraft was particularly interesting be­ the pilot didn’t wrap his transmitter an­ reminds us of what we believe was an cause it was a tail-dragging, semi-scale tenna around the guy’s throat! innovation in R/C competition which Spitfire! One o f the fastest to be seen, Pujo Stephansen (45), Norway, a this writer introduced and which met it was the only "scale" model entered, W/C contestant for many years, still with success and approval by all the but we hope it might start a trend. It tucks his transmitter up under his chin

18 MODEL BUILDER Bengt Lundstroem, of Sweden, solved the problem of strip aileron French team members; Jean-Claude Lavigne, Manager, and Guy flutter. Now just eliminate the inner portion that doesn't do much .. Hardy, pilot. Apologies to mechanic on right, we didn't get his name

Bruno Giezendanner, Switzerland, ex-World Champ in 1969 and Tetsuji Okumura (left), member of the third place Japanese team, 1971, awaits go-ahead from timer. placed 5th in spite of losing complete flight from engine problems. his wife Naomi, both very nattily dressed in matching red and grey outfits, then Jeff Tracy (38) of Australia. Rhett Miller (9), was up next and did very well, though o ff to the right in position on several maneuvers. In his Horizontal and Rolling Eights, his “ Com­ pensator” actually disappeared behind our pen with which we were aligning his maneuvers for accuracy. You can’t do much better than that! M. Somenzini (60), Argentina, had to follow Rhett’s act, and twice former World Champ, Bruno Giezendanner (17), Switzerland, was next. His new design, we felt, actually hindered any success he might have had. It had a very short nose moment, long tail moment, tapered leading edge/straight trailing edge wing, and a fin and rudder that looked as Note huge tuned pipe/muffler under ship flown by Slávko Policar, of Yugoslavia, also used by though it had once been higher before the Austrians. It didn't seem to be very effective, either for rpm, or quietness. being chopped o ff low in a straight line. and keeps a cigar going throughout the to throttle back. Sorry, Bruno, we gotta say it was... flight. Aria Goldberg (69), of Israel, was ugly! Tsugutaka Yoshioka (4), the 1973 there to learn. Young Gary Reusch (25), Canada, World Champion from Japan, showed P. Constantinos (76), of Greece, made was next, followed by V. Amenduni right away that he hadn’t lost his form, two passes before starting his ‘M,’ thus (67), Argentina, and then Benito Ber- and drew the first round of applause zeroing every maneuver. It was a mis­ tolani (20), Italy, who ran out of time from the spectators. understanding, but he took it good- just 3 feet before his roll-out stopped, Salo Feiner (63), o f Mexico, scored naturedly and undoubtedly will never zeroing the landing. Mama mia! about a 5 average, his maneuvers way make that mistake again. Warren Hitchcox (28), Canada, with out o f position and far away. Bruno Hedegaard (62), Denmark, was wifey Shirley calling, missed his spin. Mark Radcliff (6), put up a good followed by Ricardo Fombella (75), A. Masetto (72), Argentina, dug his prop flight as the first American to appear, Spain, whose engine cut after takeoff, into the paving on takeoff, but had time but was o ff position on his ‘M ’ and Top then Gerard Werion (16), of Belgium, to change sticks to complete his flight Hat, and turned way out o f his landing who averaged between 7 and 8. Next (Zero for T.O., of course). roll heading. came Giichi Naruke (19), Japan, then Emil Giezendanner (18), Switzerland, Japan’s Tetsuji Okumura(S) never got Jose Roho Ara (59), Spain, Louis Cas­ finished next to brother Bruno with the o ff the ground because his engine refused taneda (56), Mexico, who appeared with Continued on page 85

NOVEMBER 1975 19 palu bn í deska J-1 DON QUIXOT M í··» M 1-35

1 2m e d

Courtesy of MODELÁŘ Magazine, Czechoslovakia 20 MODEL BUILDER Storage compartment side of molded jug is sufficient for the modeler Pump side of jug. Complete pump/charger/glow plug power unit can who doesn't have to take half of his workbench to the flying field. be removed for charging, leave the jug in your car or garage. PRODUCT* IN U$E RG's R/C PIT PAK___ By Taylor Collins • The R/G’s R/C Pit Pak is very ap­ Pit Pak pump will fuel even the largest propriately named. It combines all of the gas guzzlers in under two minutes. Tests essential pit accessories for power R/Cers showed that the pump would pull 10 into one neat and compact package. It inches of mercury on an automotive combines a fuel storage container, a fuel vacuum gauge. This means that if the pump, a rechargeable power pack, bat­ pump were located 10 FEET above the tery charger, glow plug power source, fuel level, it would still draw fuel. The and tool box into one neat, easy to pump is wired with a reversing switch carry unit. which allows defueling as well as refuel­ The high density polyethylene con­ ing the plane. The nickel cadmium bat­ tainer is available in red, blue, or green. teries (which are supplied with the Pit The tank, which will hold 1.3 gallons of Pak) are wired in series in conjunction Pump unit pulling almost 12 inches of mercury fuel, is molded to house two brushed with a dropping resistor to provide cur­ on automotive vacuum gauge. It w ill lift fuel aluminum cases. One side opens to serve rent for the glow plug clip. better than 10 feet above the container. as a tool and spar parts compartment, The charger unit uses a power trans­ cadmium batteries are available as an while the other side houses the fuel former which is wired through a #44 option for $17.95 per set. These heavy pump, batteries, and battery charger. light bulb. This bulb drops the charging duty batteries can be charged with the The fuel pump operates on 2.5 volts, current to a safe level for the “ D” size built in charger by changing to a #45 and at a current of slightly over one batteries which come with the Pit Pak. bulb. amp, will pump 12 oz. per minute. The Extra heavy duty 4 amp hour nickel Continued on page 84

Detachable power unit, complete w ith charger and 110 power cord, Glow plug clip line has connecting pins installed. Jug holds 1.3 gall­ fuel pump, batteries, and dropping resistor for glow plug outputs. ons of fuel. Bottle comes in three colors. A very compact unit.

NOVEMBER 1975 21 Bill Nibley, first in Unlimited at the 1975 LSF Tournament, flew his "The Colonel," Bob Thacker, flew this scratch-built, straight wing Pierce 970 "Alice." San Fernando Valley Silent Flyers member. version of the Hobie Hawk to first place in Standard Class. R/c SOARING Collins The 1975 L.S.F. Tournament story and results.

• Some guys have all the luck! One siderably rounder lines than the usual fellow I know of has a corner on the Windrifter. Loren scrounged a radio on market o f both varieties. . . good and the proper frequency, put it in the bor­ bad. One week before the L.S.F. Tour­ rowed SD 100, test flew the combina­ nament, Loren Blewett’s W indrifter took tion once, and headed for Mile Square o ff for parts unknown. It seems as and the Tournament. Two days, and five though his radio just got tired and took grueling flights later, Loren found him­ a nap. So naturally, his Windrifter, being self in serious contention for first place the stable creature that it is, reverted to in Standard class. a free flight mode, and disappeared The final flight task was a ten minute straight overhead. Efforts to locate the duration flight, with three minutes after missing plane from a full size plane were the max to get down. There were one fruitless, and after considerable searching hundred bonus points to be earned by from the ground, the search was given nailing the center o f the landing circle. up. Fortunately, Loren got a good launch. Since Loren was already registered Unfortunately, there was little but sink to fly in the L.S.F. Tournament, he to be found. Fortunately, Loren was thought he may as well try to borrow a able to find a few sparse patches o f lift. plane and fly. Tom Williams had a left­ Unfortunately, Loren wasn’t able to get over prototype o f theSD 100 Windrifter, the full ten minutes, but fortunately, Bob King, Phoenix, Ariz., w ith his own-design a plastic and plywood hybrid with con­ he was very near to the landing circle. "Jaws." Shark's head attaches to wing roots.

-

Col. Bob Thacker releases his Baby Bowlus (Sept. 75 MB). Soaring Nats Scale winner placed Bottom view of Bob King's "Jaws" is pretty third at the LSF Tournament. Ship could fly in power scale w ith Nelson engine conversion. ominous. He'll CD Southwest Regionals.

22 MODEL BUILDER Soarcrafťs Hugh Stock with Magnum 12. Kit to be released shortly. Radio problems at LSF.

Dave Reitz w ith prototype Rubber Ducky Co. "Mother Goose." Span 154", 8-1/2 lbs. L.S.F. Tournament. The tasks were one Mike Reagan w ith his "W hite Trash", best sell­ round of two-minute precision duration, ing MB plan, designed by Rick Walters. one round of seven-minute duration, one round of ten-minute precision dura­ ballasting their planes... some quite tion, one round o f speed over a one heavily, and some not so heavily. mile course (four laps around two py­ As it turned out, the whole trick was lons) and one round o f ten-minute dura­ to fly through lift on the course. Rick tion. Walters nearly landed in the middle o f Mile Square Regional Park provided the course after completing only one lap. its usual motley assortment o f weather, but found a small thermal and worked it lift, and sink conditions. Both days o f downwind to gain enough altitude to flying started with fog thick enough to finish the course in over six minutes. cut with a knife. Around ten or eleven Others found lift and zig-zagged down­ in the morning, the fog would lift, the wind between the two pylons to stay in sun would come out, and the lift would the lift, yet still did not have to stop be good for around a half an hour. Then to thermal turn. Still others (myself in­ the wind would come up, the lift would cluded) managed to find enough lift to get spotty, and I’d get called to fly! stay in close to the pylons and com­ It just ain’t fair... plete the course in fair time. I weighted Joe McClaran, Visalia, Ca„ shows the rudder The speed round separated the men down my borrowed Dart II with a pound dive-brake on his "Split Tee” design. from the boys . . . and from the hangar o f lead and went through three laps at pilots. All you had to do was cover the about 100 feet. Just after I made the Unfortunately, he flew through a blast four laps and you got an immediate 450 last turn and was heading for the finish o f sink and landed outside the circle. points. Speed points were awarded for line, my rudder servo got bored and It could be said that Loren ... Blewett completing the course in less than four went to sleep. I managed to land the .. . b u t he didn’t really. He came in minutes, according to a progressive scale. Dart a half mile downwind with only third in standard class, against some of It was possible to earn as much as 1000 the elevator functioning. But like I said the toughest competition I’ve ever seen. speed points for a time of 1:00 minute . . . some guys have all the luck. Not bad for a borrowed airplane, and a or less. The fastest time posted was Colonel Bob Thacker flew his modi­ borrowed radio. But like I said, some 1:55, by Fred Weaver. The trouble was fied Hobie Hawk through the speed guys have all the luck. that there were a lot o f people who course in the zig-zag fashion and wound Tliis was the year of the potpourri didn’t finish the course. Several tried Continued on page 76

Terry Koplan gets both feet off the ground while launching Don Bob Elliot, of EK Logictrol, applies body English to his Soarcraft Edberg's second place scale "Duster." Glasflugel 604 scale ship. Looks a little high for the spot.

NOVEMBER 1975 23 Manfred Heid, Kavan's test pilot, demonstrates the Alouette for our Chopper editor. Beautiful flying site is outside of Nurnberg, Germany, home of the Kavan production facilities.

By JOHN TUCKER

• Vacation time, or "H oliday” as the 239-3174. R-BEE 110 and R-BEE 210, and really climbs like a homesick angel! British call it, is over and it’s time to Has access to machine shop, will assist Johnny, how ’bout sending us more de­ get back to the workbench. Awaiting others. tails, photos, sketches, etc. on “ Anita"? my return from Europe was a beautiful John Ellson, 165 Kennedy Road S., This chopper sounds like it would have new DuBro "Tri-Star” kit with Hughes Apt. PH3, Brampton, Ontario, Canada, tremendous appeal to the experimenter 500 body. A rather cursory examination LGW3L3. (416) 453-4051. Kavan Jet (and it has to be good if Burkám de­ of the parts and mechanical components Ranger in building. Will share electronics signed it!). told me that I’d better clean o ff the skills. John also mentioned that the instabi­ table-top and start building ’cause it I also received a card from John lity, at low RPM, which is often en­ looks like a real winner. I won’t go into Burkám in which he mentioned his countered with the non-teetering rotor details now because the complete report 3 lb.,10 oz. “ Anita” scratchbuilt chop­ heads, such as Schuco Hegi “ Carden will be in next month’s issue of MB ... per. It ’s powered with a Super Tigre .23 Head,” is probably caused by not enough but, I ’m about 75% finished and can hardly wait to get it into the air. It ’s another fast-build model, full of engi­ neering surprises, and has a certain qual­ ity which can only be described as superb .. . and the price tag, in the very low two hundreds, just has to make the Tri-Star a top contender for sales! Let’s get rolling this month by wel­ coming some new builders into the Kop­ ter Korner and listing their present pro­ jects: John Pritchard, 8183 Elmer Hill Road, Rome, N.Y. 13440. (315) 339- 2365. Completed RCM Polecat, will share building and flying. Alfred E. Cave, M.D., 519 Magnolia Blvd., Long Beach, N.V. Completed Hughes 300, now building DS-22 and Bell 212. Wants first 3 issues of Model Helicopter News. Robert G. Benson, 71 Old Orchard Dieter Schluter, the man who really pulled the cork that made R/C helicopters possible. His Ct., Cedar Grove, N.J. 07009. (201) HeliBaby is sold and distributed in this country by MRC. 24 MODEL BUILDER Karl-Heinz Denzin, R/C designer/manager of The "H elix" autogyro, by Wik-Modelle. A product review is planned in the future. The flat Krick Modellbau .. . also chief packer. spool under the fuselage is explained in the text. Try to guess first, it'll blow your m ind1. forward sweep of the rotor blades ahead o f the feathering axis. I remember a couple of years ago, one o f my favorite choppers, the Kalt Cobra, exhibited this same instability as power (RPM) was reduced for the landing approach and descent. It got so bad at low RPM that it was almost out o f control, and full power was required in order to regain an element of control. Getting such a model back on the ground is really quite a chore! Anyway, one of the solutions was to sweep the main rotor blades for­ ward a few degrees, and this produced a much greater amount of stability. THE EUROPE SCENE: After arriving in London, on British

Airways, I spent the next 5 days visiting Schluter's rig for testing the drive belt used in the Heli-Baby. Looks like the aft end of a deep V as many hobby shops as I could and hull in the right side of the picture. trying to secure information on the po­ pularity o f R/C helicopters in England. reflected a huge stock of heli-kits, spare o f his shop time in turning out a fleet There was not too much evidence of an parts, radios, etc., and his personnel o f R/C models for the movie industry. overabundance o f activity, nor were were quite knowledgeable. As you might We next flew on Lufthansa to Frank­ there many kits in the shops for cus­ already know, Mick was World Champ fort, Germany, where I rented a car and tomer selection. I did, however, take a in R/C scale in 1970 and 1971, and is drove through Germany and France for train to Mick Charles Models, at King- also well known for his helicopter flying the next 2 weeks. First stop was Mulh- ston-Upon-Thames, and found his shop ability. A t present, he is utilizing most Continued on page 68

A Kavan automatic machine in action. About 5 separate operations Close-up of the rotor head on the Kavan Alouette. taking place at once. Note solid oil stream in center of photo.

NOVEMBER 1975 25 MB's modeling friend from Czechoslovakia, Milan Kacha, built this CO2 powered New Ruler from printed sheetwood and plans by Ed Toner. The stretched nose is a little out of scale, but was necessary to make up for the extremely light Brown motor. Photo by Miroslav Kvapil. p m $ p m $ By JOHN POND taken to enjoy the scenic wonders o f This year, with the O/T booth being the U.S. next to the Work Hangar Hobby Shops, Tim Banaszak reports, after having many o f the models put on display were • Did you stay for the second half o f seen the movies on early railroading and hung on the walls in attractive poses. the “ Double Feature?” The columnist, silver mining at theCoors Brewery, that Some of the more outstanding works of of course, is referring to the Denver SAM the Silverton Railway system is indeed art were placed in the more prominent Championships over the july 27-31 week everything as shown in the movie. The position for the benefit o f the specta­ followed by the Old Timer Events at sides o f the cliffs are practically sheer, tors and shutterbugs. the Lake Charles AMA National Model leading Tim to speculate what great lift THE ACTION Airplane Championships for the week for soaring gliders. A true modeler, even As was prominently advertised at the of August 3-10. Ya didn’t? Then you on vacation! Old Timer Booth, this year marked missed a second helping o f this most The columnist arrived Saturday after­ several new innovations in old timer acti­ enjoyable phase of modeling. noon and promptly commandeered vity. John Law, who has been actively Quite a few o f the modelers who took enough materiel and benches to erect promoting old time controline stunt, in both ends of the ‘‘doubleheader,” the Old Timer Booth and model display gave several exhibitions in the controline made side trips when traveling from Den­ area. In less time than it takes to tell area after the circles had been closed for ver to Lake Charles, Louisiana; a trip of about it, the modelers, engine collectors, the day’s competition. John drew quite 1100 miles. Having four days to travel and old timers took over the booth with a crowd o f interested spectators despite this route, quite a few detours were swap meets and bull sessions. the lack o f a P.A. system to announce

Ben Shereshaw's "Pioneer" from January 1938 Flying Aces, built by Radial engine mounts for Ohlsson, Forster, and K&B Torpedo Les Payne. Boulder, Colorado .. at SAMChamps. Plans in next issue. engines by Jim Crocket Replicas. Mounts for ,29s coming first.

26 MODEL BUILDER tacular climb. Sal said all those deep bellied designs took a beating that year. Matter of fact, Sal ruefully admitted he placed 56th in Class C, it was so bad! WEDNESDAY, THE O/T RADIO ASSIST EVENTS For a minute or two, the O/T F/F radio assist events held at Larks’ Field looked like a repeat o f last year’s show­ ing (or lack o f it). Things brightened up considerably with the arrival o f Jack Bolton, Doc Bob Lane, and the New Jersey contingent, headed up by Al Schwenkart. Without waiting for any favorable flying conditions, Bolton immediately fired up his Playboy Sr., and before the boys knew it, he had wrapped up both limited engine run contests! The writer, fresh from a Texaco first Puerto Rican modelers and their Old Timer planes at the Nats (I to r): Charles Paz, owner of Hobby Centro (and the Powerhouse), Germanico Becerril, Pete Moreno (Gen. Mngr. of Ch. 7TV at Denver, (and after considerable en­ Puerto Rico), and Jose Perez, owner of the Buzzard Bombshell. Anita thanks you for the rum! gine tuning) proceeded to win the Tex­ aco Event with the engine running for when the show would be given. a gang o f the old Hampton Roads “ Brain the incredible time o f nine and a half In keeping with this same line of Busters,” consisting of Dodson, Marchall, minutes. Most models weren’t even top­ thought, the writer has contacted )erry Johnson, Parmenter, and Taibi, Sal told ping this with total flight times! Imboden, President o f Western Associa­ of the time when Joe Ott visited the Although it had rained earlier in the ted Modelers, in regard to establishing Brooklyn Skyscrapers Club in early ’39. week (a real frog strangler!) the weather an old timer stunt event. Although John Ott described the hot flying models in was beautiful, with huge cumulus clouds Laws, in his demonstration, was using the Chicago area, but as Sal said, they overhead inviting all models to soar in glow engines, )crry states the emphasis discounted it as strictly Chicago hokum. the updrafts. It was then that Bob Lane will be on ignition engines, just like Jim Driving down the street adjacent to decided to fly his Saddler Pacemaker low Saftig’s Zilch series employed. A careful the Chicago Municipal Airport where wing. After looking over the assorted look will be given to the rules as out­ the Nationals were being held, Sal yelled, warps, it was the consensus o f opinion lined by John Laws, with an eye to "Stop the car, I want to see that model that all were counterbalancing. Bolton limiting the number of models that are go.” After viewing the climb, the Brook­ volunteered to fly the pretty magenta eligible utilizing ignition engines. lyn Boys had to admit O tt was right, and white model powered with an igni­ In addition as promised, Tim Bana- but it still could be beat. However, an­ tion Ohlsson 60. szek staged his Compressed Air Event other Zipper appeared, followed by Zip­ In less time than it takes to flip a during the evening hours. Tim displayed per after Zipper, all with the same spec­ prop, the model was airborne, making the fancy placque he had worked up as a perpetual award for the new com­ pressed air event. Although, Tim was the only entry and the only one to fly, he still claimed the win for 1975. C.D. Pond, timing the flight, noted that the flight was only 22 seconds and therefore should be dis­ qualified as the time was under 40 sec­ onds. A good natured argument ensued, where Banaszek, the originator o f the rules, claimed the flyer could declare any flight regardless o f time. When asked to produce the rules, the sheets were conveniently stored in the hangar some distance from the flying. When asked to make another flight, the tire pumps promptly blew out! The battle is still going on! Haw! Despite the above levity, the event does present an attraction if for no other reason than the fact that it is an event that employs a different method of pow­ er. It is Banaszak’s hope that the event will grow and become a standard O/T event at the Nationals. Tim has an­ nounced (based on his “ success” ) that he will challenge Hughes Hobart’s com­ pressed air record o f 1932. Rotsa Ruck, Tim! ANECDOTE TIME While sitting around the old timer booth in a first class bull session with MIGHTY MIDGET Drawn by TEX NEWMAN

NOVEMBER 1975 27 Jose Perez, of Puerto Rico, releases his Buzzard Bombshell (Super Cyke) while Tim Banaszak acts the part of a hard-working timer. Naturally, he's facing downwind! a spectacular sight against the clouds. Last year he cracked up his model and Like all beginners, the rudder and ele­ found he was using the wrong stabilizer. vators had been made too small for con­ Guess what this year, after stacking his trolling the glide. Gotta make the ele­ model? He had the wrong wing on! Just vators at least 30% o f the stabilizer and don’t pay to build backup models. the rudder 40% of the fin, men! About the proudest dad on the field Moments after this shot was taken, the rubber FRIDAY FREE FLIGHT ACTIVITIES was Dick Johnson, when his boy, Guy, in G.L. Cochran's Korda let go w ith a BANG! The eleventh year o f the Old Timer cleaned house on the old regulars with events at the Nationals enjoyed one o f three perfect flights using an Atom pow­ all through the contest while directing the finest flying days seen at Lake ered Strato-Streak. Garami couldn’t have traffic. The whistle was heard loud and Charles in a long time. The day was done it better! clear at quitting time! Tireless timers simply great, with the d rift just right, For the first time since the inception Bob Land and Frank Tartaglia should running down the cross revetment o f the of the Frank Ehling trophy for the best also be commended for making the con­ main runways. performing Antique model with a span test directors life a little bit easier. To start things out right, George Per­ over 6 feet, Sal Taibi finally won this Tim Banaszak was again claiming a ryman took the first flight, only to be coveted perpetual trophy with some record o f having three different twin frustrated by a 1/2A gas job. Having very fine flights by his Forster 99 Pow­ engines in his Powerhouse for the last just completed winding his rubber stick erhouse. Strangely enough, he will have three Nationals. This year, through the model, the 1/2A whistled right through to carve a small replica o f his Powerhouse generosity of Herb Wahl, Tom mounted the fuselage, cutting it and the wing in for the trophy to replace the Powerhouse a Hurleman Twin up front. Although half. Undiscouraged, Perryman finished put on by Dave Sweeney for his win in the motor was not fully broken in, be­ his cabin rubber flights and then went 1974! Hopefully, Sal will color it in his tween Tim and Herb they were able to back to the hangar to repair and again standard orange and green colors. The get the engine operating well enough to fly the stick job to a very convincing next winner in 1976 will indeed be real register three official flights. This new win. There are flyers and there are com­ lucky! twin Hurleman by Wahl looks and runs petitors ... no question about what The author would be remiss if he well. Right now, they are collectors “ Gorgeous Gawge” is! didn't acknowledge the tremendous items, but eventually the writer hopes In the flying, several anecdotes de­ amount of help given at the recording to see more of them used for flying. veloped, among which there was Joe desk by Carl Hatrak. Missing was the Puerto Rican Invasion! That about Dodson, who built two identical models. whistle that generally could be heard sums it up this year at Lake Charles. Luis Rodriguez, his son, and a big gang Join S.A.M. came in from the island just for the old Continued on next page...

Ron Sharpton’s Foo-2-U-2 in .020 Replica size. Plans on the opposite rion is really hung up on Foo’s. The full size job is powered by a page. A great flier and easy to build. Forster .29. Uncovered ship in back is Scientific Flagship, O&R 60.

28 MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 88 F00-2-U-2... served on film . Photos which substan­ signs that showed up frequently in this tiate the design are dated April 1939, strip? wen) OLD TIMER Model of the Month hence the reason for classifying it as an This m onth’s .020 Replica design is old timer rather than an antique. the brainchild of Ron Sharpton, a Flori­ Original design by: Dick Obarski The name "F o o " was taken from da modeler, who did very well at the Replica design by: Ron Sharpton the very popular comic strip, “ Smokey Nationals old timer events, placing no Redrawn by: Phil Bernhardt Stover,” which featured a black cat gen­ less than third in a field o f 35. The Text by: John Pond• erally in the corner of the end block model had been scaled to approximately saying “ Foo,” This became so popular 150 sq. in., which has been found to be • Full credit for preserving this Dick that some o f the large aircraft were the optimum size for .020 Replica types. Obarski design should go to Ken Freese, called “ Foo Fighters" and there was Foo-2-U-2 designs fly exactly like a transplanted Chicagoan, now living in even a “ FOO” Squadron. As close as can Zippers (from which the model owes the Sacramento area. Ken was so struck be determined by the writer, the word its ancestry), i.e., right turn under pow­ by Dick’s continuing development of "F oo” was short for a popular deroga­ er, and glide right. The model trims the Zipper, that he made scale three- tory phrase o f the time, “ Fooey on out very quickly and is a consistent views of the design and had them pre- you.” (Remember the “Notary Sojac" soarer. Try one, you'll like it! ·

PL UG SPARKS (continued) . .. (new for this year) team failed to place Only one remedy for that! timer events. Despite hard luck, dad and this time but that won’t last! They had OLD TIMERS REUNION BANQUET son, each managed to win a trophy. some good flyers who ran into tough Seeing that we had a good meal at Next year, the gang threatens to win luck. And talking about luck, Joe Dod­ the Belmont Restaurant last year, the them all! Great stuff! son was mumbling all afternoon after banquet was again scheduled for the Ron Sharpton, o f Florida, showed up watching many a model “ max” out from same spot, and 88 showed! This time with an Obarski Foo-2-U-2 that flew low altitudes, when his Stratostreak the crowd practically took the play excellently (plans to be featured in a flown early could manage only two away from M.C. Pond. When presented coming MODEL BUILDER issue). The minute flights from fantastic heights. with an A.M.A. fellowship, one wag columnist had a hard time selling a ban­ Interestingly enough, these old timer hollered "Now say something.” It’s a quet ticket to Ron, as he modestly stated events, will bring out all the old timers little tough to think of something clever he hadn’t won anything. All those sou­ eventually. This year, Caldwell Johnson especially when the Reunion featured therners play possum . . . Ron garnered (Slick Stick fame) came out for the first speakers such as John Worth and AMA two at the banquet! time since 1941. Joining with Taibi, Paul President John Clemens. Clemens dis­ One could go on and on describing Marchall, Joe Dodson, and Frank Par- played a pod and boom design he had the good flying, but needless to say, menter, “ Cadwell” (as he is called) had cooked up in 1946 and with it, some everyone had a good time. The Mexican to admit he has missed a lot of years. Continued on page 74

NOVEMBER 1975 29 ROAR Nationals shows who won what. The oval results are based on average lap times for the main events, and the road results are average lap times for quali­ fying (only one round for experts). Drag racing results are based on elimination rounds. Concours was judged on appear­ ance, engineering, workmanship, and operation. The track at Rattey's Raceway is something else. When the 7 5 Nats entry package came in ) uIy, the track looked confusing because of the numerous ad­ jacent lanes going in opposite directions. I also thought the lack o f space between lanes would make it difficult to turn marshal. Upon seeing the track, the con­ Excellent driver's stand gave a good view of the track. Driver's name and home state were fusion disappeared, since the driver’s posted for the benefit of the spectators. stand was 6 feet high and gave a good over-view of the tight portions o f the track. The lanes were wide enough in the switch-back parts o f the track to R/C AUTO NEWS have a turn marshal on the track. How­ ever, retrieving a stalled or troubled car By CHUCK HALLUM .... A first-hand report, with results, on the was difficult, since the pit man had to 1975 R.O.A.R. Nationals. look at each lane and dodge cars or stand on the dividers to reach and bring • Well, the 1975 ROAR Nationals for event called, but I understood the quali­ back the car. 1/8 scale cars is over. I had a good time, fying times would be used in case of Condition o f the track and site were and thought the races were conducted rain. Besides, I did the best I could in terrific. Traction was terrific, probably in a very professional manner. However, that first round of qualifying. There because the whole area was resurfaced there were many disappointed racers were many racers who felt they would in April. The banks on the two outside when the last day o f road racing was have done better in the second round of end corners added something new for rained out. expert qualifying and the main events, most drivers. Before the Nats, we heard The oval program (two rounds of including myself. that you had to turn in the opposite qualifying and the twin main events) The tabulated results o f the 1/8 scale direction to get around the banked cor- was completed on Friday, Aug. 22, 1975. Saturday saw the first round of road qualifying completed and the drag racing program was run Saturday night. On Sunday, the second round of Ama­ teur road qualifying was completed, but then the rains came. The second round of Expert road qualifying and the main events for both Amateurs and Experts were rained out. Since rain was expected the next day (and it did rain), and many o f the race personnel had to work Mon­ day, the remainder of the road race schedule was called off. The final road positions were based on the completed rounds of qualifying. The author's Expert Oval Main winner. Layout had battery, fuel tank, and steering servo to I was disappointed to see the road left, same as in his 1974 car. Dig the fancy resting spot!

Marker team pit, with Dell Fisher (left), Tom Wisvader (seated left), Mike Morrissey (seated) and Bill Jianas getting ready for oval and Dave Bloom (right). Tom was fast oval qualifier. qualifying. Jianas placed 3rd in Expert Oval Main. 30 MODEL BUILDER The large banked turn and the tight portions of the track . . . it was not as confusing when viewed from the driver's stand! A beautiful custom built track. the track was super, and I think the areas located. I was to set up the HRE Mike Morrissey's top expert road qualifier. local area racers are really lucky to have pit down the line and next would be Typical, but tank raised to help fuel feed. the track and a fellow like Bill Rattey. MRP. The Thorp pit was on the other ners. . . to which Roger Curtis replied I arrived at the track Tuesday even­ side o f the drivers stand. It looked as “ Boy, those guys sure must go slow.” ing after getting to Boston at about though most o f the car makers were to The banking did help the cars turn, but 5:30 pm. Only a few racers were prac­ be represented. not as much as I expected. ticing, since it was almost dark. Arturo A t the Holiday Inn, Team Associated One thing I didn’t consider was that Carbonell was on the track motoring was thrashing. They had been practicing the trim adjustment on the road course around smoothly, with the engine in a since the previous weekend and most of had to be made in the racing lanes. On fast four-cycle. The engine didn't have their cars looked like they had been the oval, some outside portions of the its typical bark, but I knew that would through a war... little did I know what track could be used for trim adjustment. change by race time. Team Associated my cars would look like the next day. Also, if a car had problems, it had to be had their canopy erected in a convenient Word had it that Gene Husting, Earl driven all the way around the track to spot and Marker, Delta, Scorpion and Campbell and Carbonell were down un- get back to the pits. All in all, though, B&S Specialty/Magnum also had their Continued on page 77

Gil Anderson's concours winner. He passed away 3 weeks before There's a Veco 19, exhausting through the manifold, under the scale IMats, so car was show n b y Ray D ix o n and Ed Heck. V-12. Belt drive to left rear wheel barely noticeable.

Ted Longshaw, from England, ran this rear suspension car. Appears Arturo Carbonell's oval car. Battery and fuel tank to the left for to have only torsional flex, but ran well. weight bias. Note the staggered front axle.

NOVEMBER 1975 31 Capital R/C Model Boat Club 12 Meter fleet shows how tight one-design racing can be. The Stars *n' Stripes in the back of the pack belongs to a past National Champion. A beautiful scene.

Winner Ron Stephanz, 1973 Class Secre­ tary and Eastern Divisional Champion Bob Harris, Major Hull producer Bill Huson from Leisure Products, 1976 Class Secretary Ray Ihlenburg, Chairman of the Mini-America’s Cup Committee ŠTMCTLY SAIL John Wing, and local hotshot from By ROD CARR Richmond MYC Tom Ihlenburg. With no frequency conflicts, the com­ • August is typically the month that 45 ACCR. This was the premier event mittee set up a schedule of 21 match marks the culmination o f the sailing for the STAR Class, which will probably races, allowing each skipper to sail every season. Starting with the July-scheduled be held in Pitman, New Jersey next other in head-to-head combat. The two Gosport Regatta in England, to which year, according to Dave Holmes, the top skippers at the end o f the day were skippers from many countries traveled, 1976 Class Secretary. When the fog had to slug it out on Sunday in a best 4 out we have word that A M YA’s M-class sec­ cleared we found: 1st - Rod Carr, o f 7 series. We managed two rounds for retary, John Ball, placed second in that 2nd — Forest Godby, 3rd — Bob Harris, a total of 42 individual races and the class, with Byron Sansom, from San 4th — Pat DeGroodt, 5th — John Hem- scoring ended up as follows . . . Harris Diego, taking 6th place. Hope that we’ll malin. With over 2500 of the STAR 10 wins, Black 8 wins, and Ray Ihlen­ get some more detailed information on 45 kits having been sold, the potential burg 8 wins. The tie for second was that event in the AMYA Newsletter, es­ exists for an exciting one-design class. broken by Ray having been beaten twice pecially on the winning Swedish skipper We found that a well tuned STAR will in his two meetings with Black during who took both M and 10-r class events!!! point much higher than a starved EC/12 the day. Here in Washington, D.C., we hosted and that one could tack within an angle With the stage set and a crowd of the 50/800 ACCR on the lake adjacent o f 75-80°. Next month we’ll discuss in 300 on hand, Sunday started with com­ to Dulles International Airport. After detail the configuration of the winning mentary from Rich Palmer o f Rich’s two days o f tough competition the stand­ boat, with suggestions for rigging and Hobbytowne. Harris immediately put ings wound up: 1st — Chuck Black, construction changes to the stock Dumas the pressure on by winning the first two BINGO; 2nd Rich Matt, BINGO; 3rd kit. heats. Black came back to even the score — Stan Goodwin, WARRIOR; 4th Bert * * * at 2-2, then traded victories for a 3-3 Lott, WARRIOR; and 5th Forest This past week-end, we helped the tie going into the last race. Watching Godby with a boat o f his own design. 2nd Mini-America’s Cup into the record theshiftingwinds, Black hovered to wea­ A good portion o f the action was video books. Here is a ritsy-snitsy event, it is ther o f the starting line with 30 seconds taped by John Huson o f Leisure Prod­ sailed in East Coast I2 ’s and is by in­ to go, then abandoned his previous star­ ucts, and is providing exciting viewing vitation only. This year’s selection of board tack start, to start on port and for all. contestants was enough to give pause ride a lift all the way to the weather On the following week-end, the hea­ to the faint hearted: The 1974 Mini- mark, opening up a lead that was neither vens opened up and it poured all day on America’s Cup Defending Champ Buddy spread nor reduced for the rest o f the the skippers assembled for the STAR Black from Tampa, Fla., 1974 ACCR race, an indication of just how well

32 MODEL BUILDER sail the course. A windward-leeward ar­ rangement is used with the starting line half way in between. The spice comes when the boats are on the leg between the leeward mark and the line. While here, and only here, they may be as­ sisted or interfered with by the other boats on the course . . . according to the rules o f course . . . such as port gives way to starboard, leeward boat can luff, etc. Getting your three boats around the course like a relay team then be­ comes a matter o f cooperation among team members, and maximum hindrance among the enemy. While sucn a game will probably be OK for 36/600’s, I’d be a bit careful if M’s were scheduled to r y, and would give long thought to tything bigger being suitable. Of couise, some enter­ prising designer may come out with a boat with a rubber gunwale and bow like a seagoing “ bump ’em’’ car. The skippers who have played report that some o f the guys who take home the trophies all the time don’t do so well at this when required to exist right in the center o f a 4 to 6 boat pack. And Gene Stagner's 776 Santa Barbara sailed in the conversely, some o f the tail-end Charlies Ray Hickock's LJ 50 No. 618, another "Big Boat" division of the Indy regatta. participant in the Indy regatta. are so used to being jostled that they are Chuck Black's 50/800 downright superb. Let me know if you matched the skippers were. The race try it, and what variations you adopt. under,” including some designers. I hope committee, consisting o f Rod Carr, Cas Might make an interesting format for that this may lead to increased inter­ Woodbridge, and Joe Schoonover, de­ inter-club challenge racing!!! change between skippers here and * * * clared Buddy Black the winner of the abroad. And with some luck we may 2nd Mini-America’s Cup. We are lucky I am happy to report establishing a be able to persuade them to let us pub­ to have again captured this amazing communication link with Max Lewis of lish some o f the new designs that are series on video-tape, with John Huson the Sidney (Australia) MYC. Max is the available. One I ’m most interested in is manning the camera and Chris “ Cosell” editor of ROUND THE BUOYS, a an “ A " boat which is reported to dis­ Harris providing the commentary. monthly newsletter that is trying to pull place only 28 pounds!!!! ZIPARDEDO- * * * together the scattered Australian model DAR, designed by Adrian Brewer o f the The local 36/600 fleet has been ex­ yachting effort. I will be excerpting Albert Park MYC took the RA class perimenting with an interesting variation news of interest from his monthly effort, Australian championships with the boat on team racing. The fleet is divided up and am happy to say that he is joining this year. He has also done a new 50/800 into two 3-boat teams. The object is to our AMYA as a means of getting the called SONIC BOOM, and just from the sail the course one-team member at a straight dope on American model yacht­ name alone it has got to be an interesting time, passing an imaginary baton by ing activity. He has put me in touch hull form. tapping the next team boat that is to with a number o f active skippers “ down I have some requests out for photo­ graphic coverage o f the Australian brand of our sport and will include in upcom­ ing columns anything that comes my way. Max reports that they have been known to sail from within automobiles with the antennas sticking out a partially opened window when the rains got too heavy. I’d say that they have the exact same form o f the disease that so many of us have in the US. * * * I’ve been asked a number o f times why more material is not published from around the country. The simple answer is that I am not sent any to speak o f from the clubs who are active. Happily there are a few exceptions to the rule and one is that sparkling new Indy MYC that I announced last month. They have held their first regatta, and the following was sent by their President Ted Brindle. Thanks Ted, I wish there were many more like you. Next time, Chuck Black's 50/800 winner, "Bingo". Note the strong boom vang used to control leech fill us in on exactly what each skipper tension off the wind.Rig weight was 14 ounces plus. Continued on page 75

NOVEMBER 1975 33 Jim Parsons w ith his Smoothie at the BMA contest in Seattle. Trans. Dist. XI V.P. Homer Smith is basic FF freak, but has been flying Monokote on open areas, DJ stripe, white dope on the rest. some .049 Combat lately. It's D irty Dan's "GollyGeeWhiz"' design.

ontrol line By "DIRTY DAN" RUTHERFORD

• As promised last month, we’re going sitting through a very emharassing and (?) Hot Rod Lincoln. If you don’t re­ to have a sing-along this month. Now painfull few minutes. member that song, better find somebody sing-alongs aren’t what you are used to After warming up on a whole bunch who does.soyou’N be able to sing along. running across in this column, but if of boop-de-boops, bop-bop-shooo-bops, I am going to write down all o f the you’ll just hang loose and play along, it etc., etc., Jeff finally started to sing. verses, but you’re going to have to make might be fun. Then again, it may be a Looks o f “ what am I doing here” were up the stuff between verses on your own. bummer. Let’s find out. passed around. Somebody wanted to Ballad o f the Folken “ A ” This song was written by a flying know what Jeff had been smoking. I “ Intro: The CD said, “ Son, buddy o f mine, good o l’ Jeff Rein. At a knew what he’d been smoking. That’s it ’s a real disgrace to fly a Combat recent contest, Jeff came over to a why I had wanted to leave in the first plane in a Slow Rat Race.” group of us and asked if we would like place! By then, Jeff was into the second to hear his song about Slow Rat. Now verse and we were all listening and ac­ “ Well, you’ve heard the story Jeff is basically a little weird and I al­ tually enjoying it. Further into the o f the Slow Rat Race when the ready knew for a fact that he couldn’t song, people were tapping their feet, Fox’s and the ’tigres were setting sing very well, so I started looking for using tool boxes for drums, and a crowd the pace. a reason to leave. But Jeff tied me to was gathering. By the end o f the song, Well, that story is true, I’m here his 189 lb. tool box with his best set o f Jeff was the hero of the day. to say, I was flying’ my Folken Combat lines and I resigned myself to The song is based on that old classic “A.” “ It had a ‘tigre motor that was really hopped up, that Folken “ A ” body made her look like a pup. I honed the cylinder as I recall, high nitro fuel, it just don’t stall. “ It had pressure feed and a piped exhaust, with an 8-8 prop you can really get lost. I wore a safety thong, but I ain’t scared, the lines are good, bell- crank fair. “ I went racing down in Eugene late in May, the sun was shining on that windy day. I was going so fast you should have seen my m ill, passing planes like they were standing still. “ All o f a sudden, in the wink of an eye, a black Flite Streak just hon acoones trying for a needle setting on his Rossi powered Goodyear. A "D oc" Anderson passed me by. Rossi, the open end megaphone makes the ear muffs a necessity. (What did you say??) I said, “ Boys, that’s a mark for

MODEL BUILDER A top CD in the N.W., Suzanne Saterlee works Don Schultz, judging stunt at the BMA affair, David Aoyama tuning his Mo-Bipe Profile all C/L events but is especially good as a Com­ indicates landing and appearance points earned Carrier plane. He placed 3rd in this event at bat CD! Who could argue with that smile!? by DD . .. combined! the '75 Nats, Senior category.

me.” by then the rudder was all crashed almost. The guy beside license to fly ’ and that Flite Streak you could see. me was white as a ghost. dropped down and let me by. “ Well, the fellows started rib­ ‘‘Well now, the boys all thought "Well, just when I thought I bing me for being behind, so I I had lost my sense, they were had the race in the bag, my thought I’d make the Folken “ A” getting scared and a little tense. hopped-up ’tigre started to sag. unwind. I got too close, he said ‘‘Go First it started smoking, bearings I had her high coming downwind, around.” I held my course and started to squeal, my Fireball plug and man alive, I pulled her into a forced his plane into the ground. blew a seal. dive. “ Flames were coming out o f the " I still had a chance with five “ I wound her up to 110, my stack when I started to climb on laps to go, but then my crank stop watch said I had hit top end. that Flite Streak’s back. decided to blow. I whipped that plane like never I knew I could catch him, I started I knew right then I had lost the before, that's all there is, there to drool. Wouldn’t you know by race that day. I was so mad I ain't no more. then I’d be low on fuel? yelled, ‘Folken ‘A ’. ” 1 pulled a wingover and side- "I figured it was time for me to “ Well, the CD came over to swiped Tom Tuck, crossed my make my move. I got that Folken look at my plane. He shook his fingers just for luck. " A ” right in the groove. head and said, "Man, you’re in- Our wingtips were clicking, we I said, ‘Look out boys, I got a sane· Continued on page 63

[O'/

Here he is, folks, the author/singer of that famous ''Ballad of the Kit Gerhart (left), 1st in Combat, and Ron Ridgeway. 2nd. Kit used Folken A ." The model is "Foamesis", foam winged "Nemesis." modified "Nemesis," Ron a VooDoo with long booms, bladder tank.

NOVEMBER 1975 35 ‘TWIRP’ By DAVE GIBSON

Designed for a 4-H Aeronautics Project, this little fuselage model embodies many of the important basics that will be used by model­ ers throughout their hobby career.

INTRODUCTION: • In developing this 4-H project, one o f the basic philosophies / tried to live up to was: Provide the maximum op­ portunity for long duration flight through simple planes that build quickly. The phrase to understand is "long dura­ tion. ” To me that means a flight so long that the laws o f gravity are exceeded in the novice's mind, and the experience spreads across the ego like a blush. This feeling is not lim ited to novices, o f course. A t a recent contest in this area, / heard a gym-full o f experts ap­ plaud the flight o f Charlie So tic h 's Vo/ks- ptane peanut, when this anti-gravity feel­ ing engulfed the crowd as Charlie’s plane flew almost forever. The idea is to generate this feeling in the members quickly, and to allow them to achieve it without all the search and Framework of the TWIRP discloses the frustration that follows the beginner simplicity of the structure. Beth "Tw irp" Gibson, for whom the model who tries to get into the hobby on his was named. Builder of planes and collector of own. It is the thrill and the accomplish­ If, at one time or another in your beer cans, also winner of President's Physical ment of flight which, / feel, are prime life, you struggled w ith manhole-cover- Fitness Award, push rods, bellcranks, and all! motivations. kits o f rock hard balsa that refused to The side o f our hobby that frequent­ fly on 'the rubber strip provided, you so they will feel no guilt because they ly shows itself to the novice is the d if­ know what / mean. do not share what they know w ith those ficult kit in a mass merchandising outlet / know there are people who say, who want to know. Fortunately for all (where perhaps no model plane maga­ “The heck with him! If you want to o f us, / also know many other people zines are sold), and because the plane succeed in this hobby, you have to try who do not feel this way. But as / have appeals to him and he has fantasies about and try again, on your own, like / did! ” worked this project out, and as it has its flight, he enters the hobby. Disap­ To those people / would suggest that gone on for so many months, / cannot pointment may turn him to other in­ they are rationalizing their own selfish forget that it was the 4-H and the School terests. interests. They are defending themselves Department that made it a ll possible. It

Meetings of the 4-H Aeronautics Project include some building, some flying, and some listening. This "4-H-er" stick model, held by Mark Theis, Leader (author) preparing blackboard for discussion on incidence and thrust adjustments. builder/flier, is prerequisite to TWIRP project.

36 MODEL BUILDER FULL SIZE PLANS AVAILABLE - SEE PAGE 88

was not the hobby, its organization or nights. As we move from the indoor As more complex and more expensive dubs, nor the hobby industry that did program to outdoor flying, the tradi­ projects are undertaken, we think in it; and that is something we should tional evening is an outdoor project o f terms o f fund raising. That may seem think about, isn 't it? building and flying the "Flash X'-18," impossible to some people, but the 4-H In planning what each plane in the from Frank Zaic. can organize for this sort o f thing. A n­ project should be, the costs, the new Our operation was established from other 4-H project in this area raises about learning experiences each should provide a cost standpoint, so that after an initial $500.00 each year on a chicken barbe- to the members, and so on, / decided on payment, small dues would pay fo r the que, and there are popcorn sales at pub­ a paper airplane, a North Pacific "Sleek project through the indoor season and lic events, cake sales, paper and can Streek, " and after that / would have to the construction of the first outdoor recycling projects, and so on. design some planes. Four planes make up model, as well as for glue, pins, building The project itself can't provide the our first indoor flying season. In addi­ boards, and materials. . . also soda, cook­ total learning experience, and to aug­ tion, but not a required part of the ies, and prizes on contest nights. The ment what is presented during the meet­ project, the members have access to my theory here is that the time period in ings, the reading o f magazines is en­ many plans for building other planes. which a plane is built and flown allows couraged. Youngsters find the cost o f And to break up the program, we have the accumulation o f funds to pay for it model plane magazines high, but / felt paper airplane and “Streek” contest and to make a dent on the next project. Continued on page 57

Does the last name ring a bell? Steve Kurth at work on a TWIRP. What it's all about. A model that will stay up longer than it takes to He's a project record holder. Note forest of pins. fall to the floor! Ross Jahnke's TWIRP after ROG. He's 11 years old.

NOVEMBER 1975 37 FREE FLIGHT SCALE PHOTOS BY FERNANDO RAMOS By FERNANDO RAMOS AND WARREN SHIPP • I have quite a few items that I want gated the hole in the plastic pearl. This ✓ - to cover this month. For starters, I want in turn caused the model to lose its to take the time to thank ail of you who thrust adjustment as the motor unwound have written, and say that I'm slowly (less tension). With all this going on one getting all o f the letters answered. I can see that trimming a model is quite have several responsibilities that often difficult. make it impossible for me to get to my My first six flights or so were pretty correspondence as quickly as I would much the way I wanted them, but as I like . . . but rest assured, I’ll answer your increased the power and the winds, my letters. problems really began. As I launched the In preparation for the Thompson “Toots,” it would go straight up, roll A couple of "Vultures" from Las Vegas, Chuck Trophy contest, I built a model of the over on its back, then straight down. West (left) and Bob Haight. Folkert’s SK-2, using the Cloudbuster’s I was in a quandry as to what was caus­ Racewing drawings (see ad in this issue). ing the model to behave the way it was, So . . . the moral o f the story is, at For the first lime ever in a model, I especially after the great flights I was all times try to keep the m otor peg on, incorporated Jim Dean’s adjustable getting from it with lower power. I or as close as possible, to the thrust thrust bearing. Well, I learned what not checked the thrust, and it was where I line. This will avoid any difficulties in to do when using this clever device. My thought it should be, yet each time the hold a thrust adjustment. Don’t use a first error was to use a plastic pearl. (Yes, model was launched, it did the same plastic pearl (other plastic spheres may I know that I recommended using these thing. be more suitable) on a model that re­ . . . but I'll explain). On the plans for the Well, after all but destroying the quires quite a bit o f power. I eventually Folkert’s the motor peg is shown con­ Folkert’s I finally figured out what was ended by using 10 strands o f 1/8 inch siderably below the thrust line. This in happening. In appearance, the thrust rubber. This amount o f power, along itself puts a tremendous strain on the bearing looked like it was holding its with the bind, caused too much wear on prop shaft (see Fig. I ). Add to this the adjustment, but as the tension o f the the plastic pearl. Glass or metal would necessity of down thrust, and you can motor pulled downward on the shaft do much better here. see what is happening. This continual (due now to the elongated hole in the Another lesson I discovered too late, strain on the prop shaft eventually elon- plastic pearl), up thrust was occurring! was that the adjustment screws on the

Close up of Bob Haight's Turner Special, "Miss Howard "M ike" by Granger Williams (Williams C h a m p io n ." Bros.). Flies well with M-6 airfoil.

38 MODEL BUILDER Steve Wittman "Bonzo" by Larry Moss, has only 13 inch wingspan. Art Chester "Jeep" by Tom Laurie, uses the R.A.F. 34 airfoil des­ Peanut size! cribed in the text, also has trick stab incidence adjuster.

Winner of Flightmaster's Thompson Trophy event, Vince Costanzo's "Chambermaid." Contestants lined up for the simultaneous launch rquired for the Thompson Trophy evept. Last one down is the winner of the heat, second from last is 2nd, etc.

Second place winner in Thompson event, Wedell Williams by George James.

"And awaaaay we go!" From the foreground, we see Ramos, McCracken, Haight, Moss. James, and West. If the scale factors don't get you, the mid-airs w ill! Folkert’s was to use an entirely different of-sight! airfoil than the plans called for. For Armed with this secret weapon, I one, the plans show an undercambered talked Jack McCracken and Tom Laurie airfoil, and the Flightmaster Thompson into using the airfoil. Jack was building Trophy rules do not permit the use of a Folkert’s SK-4, and Tom an Art undercambered airfoils. Several years Chester’s Jeep. All three of us went out ago, a friend o f mine in England wrote together to test fly and to my amaze­ to me about the merits o f the RAF 34 ment each model was unbelievably sta­ airfoil (don’t confuse this with the RAF ble. The more the models were flown 32), for racing type airplanes. Fie had (including my SK-2, until I ran into experimented with both rubber and gas trouble as previously mentioned) the powered models with incredible results. more we realized the potential o f this In fact, several o f his models flew out- airfoil.

Our intrepid FF Scale editor with his Art Chester "G oon" and Folkerts SK-2. thrust bearing were installed from the front. What’s wrong with that, you say? It just happens that the Folkert’s has a spinner, and with the spinner installed, you can’t get to them for adjustment. Who says you can’t teach old dogs new tricks!? One major modification I made to the

NOVEMBER 1975 39 In Fig: 2 you will see the coordinates R.A.F. 34 Top view of fuselage for this sensational airfoil. I would like most scale, etc.). Each “ p ilo t” was to to see more experimenting with this air­ draw a number (I or 2) to see which foil for low and mid-wing scale models heat his model was to fly in first. There­ using either gas or rubber power. One after, the models were changed around very important item involving the use so that those not doing so well would of the RAF 34 is to incorporate 3° of not always have to compete with those washout on the tips. D on't leave this which were. out! There were 6 models flown in each I’m presently working on a jumbo heat and there were 6 heats. This gave rubber model o f a Czechoslovakian Zlin each model a chance to be flown three XII. This is a low wing, high aspect ratio times. With the models fully wound, design that will have the RAF 34 airfoil. each “ pilot” was waiting for the count I'll report back after the flying begins. down to launch. I want to tell you that I might add that I also plan to install an Tom O’Brien was right (July ’75 F/F .020 Pee Wee into my Folkert’s as a Scale column). There is no sight quite test bed. If it works out as anticipated, like that of seeing 6 scale models take to I would like to build two more, one for the air at the same time! Most every rubber and the other for gas. model flew exceptionally well. The first With the contest only a few days model down was given a score o f 6 away, and my SK-2 about as ragged as a while the last model down was given a model can look after all the prangs it score o f 1. This occurred for each heat. took, I resurrected an A rt Chester’s Then all o f the flight scores were added Goon I had built about 5 years ago. It is to the scale scores to determine the rather ironic that when I first built the winners. This system isn’t fool-proof, model, I could never make it fly. For­ but it did work out satisfactorily for tunately, this changed for the contest. the first time around. The Flightmasters held their Speed Granger Williams had a super Floward Contest at San Marcos, with beautiful Mike which had an M-6 airfoil. The M-6 flying weather throughout the day. A f­ is very similar in appearance to the RAF ter the speed events were over, the 34, and the flight performance o f the Thompson Trophy Race was held. There Mike indicated that the M-6 is also an were 12 entries for this first outing, airfoil worth considering. The winner, which isn’t too bad. These 12 models Vince Costanzo, was flying a Chamber’s were first judged for scale, using the Chambermaid that he modified from Mooney system (that’s ranking them another Racewing drawing. Vince used from 1 through 12, with 1 being the Continued on page 77

COMMON PLATFORM BALANCE

40 MODEL BUILDER ANNOUNCING! MODELS? BUILDER m a*az'ne’s SECOND ANNUAL INTERNATIONAL Parcel Post Proxy Peanut RUBBER SCALE CONTEST!

EVERY PEANUT MODEL, FROM NEAR OR LOCAL MODELERS WILL BE ALLOWED TO FAR, WILL BE PROXY FLOWN, INDOORS, BY ENTER, BUT THEIR PLANES MUST ALSO BE SOME OF THE U.S.A.'S BEST RUBBER SCALE PROXY FLOWN, AND NO VERBAL OR PHYS­ FLYERS INCLUDING WALT MOONEY, BILL ICAL HELP WILL BE ALLOWED FROM THE HANNAN, CLARENCE MATHER, BOB PECK, OWNER . . . ONLY WRITTEN INSTRUCTIONS FERNANDO RAMOS, BILL WARNER, AND TO THE PROXY FLIER, AS ALLOWED FOR MANY OTHERS. ALL ENTRIES. Open to modelers from all parts of the world... any nationality... any age... any sex... come one, come all!

AWARDS to include TROPHIES and MERCHANDISE . . . ALSO, a KRAFT RADIO SYSTEM to the GRAND PEANUT of 1976! (HIGHEST OVERALL COMBINED STATIC AND FLIGHT SCORE) Other prizes include such items as; Peanut Scale kits and materials, Astro Flight and VL Products electric motors, Brown Jr. twin and single cylinder CO2 engines, Uber Skiver knives and sets . . . over 50 trophy and merchandise awards altogether!

Contest Director: CARL HATRAK Chief Static Judge: RUSS BARRERA Competition w ill be divided into five (5) classes: Pioneer, Scoring w ill be based on the total o f each entry's static World War /, Golden Age, World War II, and Modem. There scale points (100 maximum) and flight points (100 max- w ill also be individual awards such as; most distant entry, mum). Static judging will be according to AMA Indoor best shipping container, entry most damaged in shipping Rubber Scale rules. Flight points w ill be the average o f the (Don't try hard for that one!), best entry built from Walt two best flights out of four official flights (10 seconds Mooney plans, best model by a female, best entry by any minimum, 100 seconds maximum). Ties w ill be broken by modeler under 15 years o f age, oldest qualifying contestant, highest single score, or a fly-off. Number o f attempts to be youngest qualifying contestant, best biplane (Big John limited, subject to size o f total entry. DO NOT SEND UN­ Award!), best entry built from a Peck-Polymers kit, longest TESTED MODELS! A three-man ju ry w ill preside over all flight, most static points, plus a few surprises. decisions. SCHEDULE: Register by mail on or before February 1,1976. Models to be on hand on or before April 1,1976. Contest to be held approximately April 15 to May 1,1976. Send in now for your registration form, which includes an entry blank, a complete set of rules, and other particulars. Write to: MODEL BUILDER PROXY PEANUT CONTEST P. O. Box 4336 Santa Ana, California 92702 USA

NOVEMBER 1975 41 "And now, a Four Peanut Roll." So there, nobody's perfect . . even Bill Hannan flies R/C! F/F rubber flier Mark Smith watches. . . . flying on air is somewhat akin to walking on water . . . WHITTLE OUT AN AEROPLANE? Bad pun, perhaps, but we needed an CLASSROOM VOLKSPLANE the “ texts” used are SPORT AVIATION excuse for mentioning the book Jet, The • Some time ago we reported on a and MODEL BUILDER magazines. The Story o f a Pioneer, Sir Frank Whittle. Granada Hills High School aviation pro­ ultimate school project is constructing This is the man, o f course, who did so gram conducted by L.B. Cotter, Jr. a full-size Evans VP-1, and we’ll be look­ much toward making the jet engine a Initially, the class project was building ing forward to seeing photos o f it when practical concern. And, as in the case o f Walt Mooney designed Volksplane Pea­ completed. so many successful aviation innovators, nut Scale models, followed by a “ Change HMMMMM! he was a model builder who: “ ... de­ the Volksplane” contest, with modifi­ In a recent television interview, a voted hundreds o f hours, often when I cations left up to each student. To help 94-year old man credited his vigor to should have been elsewhere. It would inspire the budding enthusiasts, two o f eating peanuts every day of his life! be difficult to over-emphasise the im­ portance of the Model Aircraft Society to my subesquent career, partly because of the absorption o f the large amount of aircraft engineering knowledge which went with it, and partly because my abilities in model-making compensated in the eyes o f authority for certain short­ comings in other directions.” Thanks to Frank Zaic for bringing this item to our attention. ADDRESS CHANGES: Harold Swanson o f Modernistic Mod­ els reports a change in Zip code. His P.O. Box is right where it always was, but the bureaucrats evidently felt the need to change something. Why not send a stamped envelope for Harold’s latest list? Modernistic Models, Box Beautiful Miles Sparrowhawk from Mooney/MB plans, weighs 1/3 of an ounce. Photo and 6932, Burbank, Ca. 91510. model by Bob Clemens. Prop is free-wheeling. See the bent-over shaft? Continued on page 72

Realistic air shot by Doug McHard of his rubber powered Bf-109E. P-51 Mustang, constructed by Steve Walton, from a Peck-Polymers Plans are in the "Flying Scale Models of WW II" book. See p. 70. Peanut kit. Photo by Daniel Walton.

42 MODEL BUILDER

MODEL AIRPLANE PRODUCTS CATALOG NUMBER 27. Made in America

amwm m m m mm

L o n g Short Long Short Standard Series R. C. R C Standard Standard 40602 4 0 5 0 2 40201 40101

Long Long Short Shon 2-Volt Series R. C. (Lead Acid Batt.) Standard R. C. Standard GLOW 40603 40203 40503 40103

Long Lo ng S ho rt Racing Series td le b e r R a rin g Racing PLUGS 40604 40204 4 0 1 0 4

3 . The third feature originated by Fox. and as far as In Ira* than ten year* Fox Glow Plug* have be­ idle bar plugs are used in throttle motors, as these we know »till exclusive with Fox, is the use of a com e the W orld’s largest selling glow plugs: p n mař­ have a better capability of keeping the element ily. we like to think, because we offer advanced patented space-age insulating material. This mat­ warm during prolonged idle periods. The 2-volt design and quality products at moderate prices. erial will withstand a higher temperature than scries are similar to the 1.2-volt scries except that Som e of the features that have made Fox Glow Plugs glass but is not brittle and will not crack under the element is slightly smaller in diameter and more successful than others are as follows: stresses introduced by tightening the plug. longer in length und provides the resistance neces­ 4. A fourth feature that has made Fox Plugs popular sary for use in lead acid batteries. A lot of people use 1. Gold plated core pieces: This ha* a double advan­ is our method of manufacturing the idle bar hous­ a motorcycle-type battery and tap off one cell to tage of providing a superior weld between the ing where the idle bar is an integrally machined provide current for the glow plug. The racing series electrode and the core piece and in addition, plugs are not for general use and are intended only makes the best possible contact with the glow plug portion of the housing. This virtually ebininates for use in engines which have very dose squish lead. You will have virtually no contact problems the risk of a weld failure and having a piece of the plug drop into and destroy the engine. bands and seem to be unable to hold an elem ent in a with Fox Glow Plugs. 2. The second feature, discovered and originated by 5. A fifth reason why Fox Glow Plug* have been standard plug. Our racing series plugs have ele­ Fox. although now used by some of our com­ successful is that most engines seem to run better ment* made of a different material which is much petitors, is the use of a Rhodium-platinum ele­ with them. The way they got that way is that we stronger at operating temperatures and can resist ment material, rather than thr iridium-platinum have made thousands of plug* with varying di­ the shock waves which a dose squish band will set generally used in yesteryears. The Rhodium- mensions and selected the ones that seemed to off. This, unfortunately, makes it unsuited for use platinum combination has the advantage of ignit­ work best on a wide variety of engines. with a standard hobby battery or N l-Cad. Som e sort ing the fuel at a substantially lower element tem p­ The standard scries o f plugs are our best sellers. of a rheostat controlled power source must be pro­ erature than the iridium-platinum alloy. This Three arc usually used with a hobby battery fir in vided that will limit the input amperage between 5 means that when you do a touch-and-go or a simi­ som e cases a Nl-Cad. The short standard and long and 6 amps. The benefit, however, is a virtual end to lar maneuver your engine is less likely to quit standard are generally used in control line motors element failure. when you hit the throttle. where idling is unimportant and the short and long

FOX FOUR WAY WRENCH FOX TWO WAY WRENCH The Fox Two Way W rench was nriginall) developed in our own shops for the convenience of our own employees in The Fox Four Way Wrench is a professional grade tool working with Fox Engine*. The small end of each o f these specifically designed for tim e who like the four way design wrenches are all broached to fit the Fox Glow Plug and are but are not satisfied with the low grade die cast tools now on necked down so that they will reach inside of the fins. The the market. The Fox Four W ay W rench is the finest you can length of the T-bar is enough greater than certain die cast buy. The beautiful chrome finish of the Fox Four Way wrenches that it often makes the difference between the Wrench doesn't work one bit better than if it were a dull, battle-ship gray, but it does a world of good for your morale propeller staying on or being thrown off in flight. Use a Fox and pride and isn’t ‘'pleasure" what modeling is all about? Wrench and you will not be throwing propellers. Fox 2 W ay W rench · Fite 3/16 shaft m otors 70101

Fox 4 Way W rench ...... 7 0 1 0 4 F i t s V a shaft m otors . .70102 Fits 5716 shaft m otors 70103 o FOX 15BB FOX 40 BB

B o re...... 590 B ore...... 800 Stroke...... 550 Stroke...... 790 Disp . .15(.25cc) D isp...... 399 Wt...... 6 oz. W t ...... 11 oz. RPM ...... 26000 RPM ...... with With big-throat racing carbu­ carburetion and retor and prop racing prop with 60% nitro fuel 28,000 RPM with pattern carb and 10-6 The new Fox 15BB i* .»n all new motor unlike any that you have seen prop - 13,500 before. It uae« the basic Schnuerle purling concept. However, the motor has been put together in an altogether new fashion, which makes it possible to The Fox 40 BB offers many interesting possibilities. With a conventional shape and contour the bypasses the way the motor wants them. Also, the small throat carburetor it makes an excellent pattern engine for the medium structure is more rigid and warp free than most conventional design IS size radio control pattern type airplanes. For high speed work the same engines. The flanged type carburetor mount makes possible a wide choice of carburetor used on our Fox 78 will bolt right on and will provide enough flow carburetion. The Fox 15BB has probably the largest main bearing and for the engine to run quite smoothly in the 20.000 plus RPM range. The big crankshaft |mrt of any 15. size engine available in the world. The main .590 diameter crankshaft can be ground out on the inside to over 7/l6th diameter is .450 and on the OD and racing enthusiasts can safely grind the ID diameter, which is a bigger hole than you can get on any 40 size rear intake. out to 3/Bth· diameter. I nlike conventional ball bearing m otors, the new Fox The cylinder porting follows the most modern Schnueric type thinking and 15 runs loos» balls directly on the crankshaft in the highly loaded rear the round exhaust stack provides excellent attachment possibilities for a position and runs an SAE 660 cast bronze bushing in the front position. This carry away tube, standard concept muffler, or a tuned pipe. A variety of loose ball arrangement completely bypasses the retainer failure problem. cylinder options arc available. It is normally supplied with a single ring Another unique feature of the Fox 15BB is the unusual curvature in the two aluminum piston and a nitridrd cylinder. However, soft steel or brass cylin­ primary by-passes·. This curvature directs the by-pass gas over the top o f the ders liners can he ordered. Also ABC type alum pistons can be ordered. With piston and against the hack wall directly and then as the piston lowers, all of these options at your disposal you have a wider choice than is available sweeps upward, resulting in better piston cooling and a more complete from any other manufacturer. The Fox 40 BB was intended to be a com peti­ cylinder fill than convents nal straight bypass arrangements. It is rare that a tion engine hut it has none o f the crankiness often associated with com peti­ motor will perform outstandingly in a medium RPM range; and with no tion engines. For average sport flying you will be amazed how it will run and change in port timing can befitted with a small propeller and a hig carburetor run and run and give you no problems at all. and will perform equally well in the racing range. The Fox 15BB is truly an Fox 40 BB with suction type needle valve aesem ...... 1 4 1 0 0 exceptional motor with pressure type needle valve aesem ...... 1 4 2 0 0 FOX ΙδΒ Β -with Suction N. V. Aesem ...... 1 1 6 0 0 with pattern type carburetor ...... 2 4 1 0 0 with Needle Valve for P ressure ...... 1 1 7 0 0 w i t h r a c i n g t y p e c a r b u r e t o r ...... 2 4 2 0 0 with Throttle for Sport F lying ...... 2 1 6 0 0 with Throttle for Racing ...... 2 1 7 0 0

FOX EAGLE 60 FOX COMBAT SPECIAL Bore...... 907 Stroke . . . .937 Bore...... 800 D is p ...... 604 Stroke ...... 715 W t...... 14 oz. Disp ...... 359 RPM ...12,000 Wt ...... 7% oz. with 11-8 prop RPM ...... 19,000 with an 8-7 combat type prop

Tlie Fox Eagle 60. first introduced in 1972. has now undergone several minor redesigns and has evolved into one o f the W orld's most practical sport grade 60’s. While it lacks a few hundred RPM of being the equal of our new Schnuerle ported Fox Hawk, it is undoubtedly one of the easiest starting motors on the market. It always starts, hot or cold, and no starter is neces­ The Fox Combat Special is aapeciaiized type of motor designed especially sary even for beginners. A simple straight-forward construction makes for Com bat jiving. Its nrtrdle valve assem bly is designed to hold the pressure repairs easy to make if you should be so unfortunate as to have a vertical of bladders and to give reasonable adjustment with a pacifier or bladder landing. The Fox Eagle has the remarkable capability o f running as fast and tank. Construction of the engine itself follows normal double bearing prac­ reliably after 100 or 150 hour use as it does when it is brand new. Basically the tice except that the nose is very short to minimize turning radius inertia. The loop scavenge arrangement on our Eagle is a more econom ical design to piston is lapped meehanite and the piston and cylinder thickness have been produce than the Schnuerle port arrangement of our new Hawk and we think so matched that the cooling rate on both are nearly identical, which is what that for a great percentage of sport flyers a few r.p.tn. is o f less significance you need for superior hot restarts. In keeping with best construction prac­ than the dollars involved. Construction-wise the latest Eagle features a tice. the crankshaft main is a full half inch diam eter and made o f alloy steel. muffler mount that can he removed by means of two screws from the bypass The connecting rod has been machined from bar and is bushed on the lower side without removing the engine from the airplane. Like all larger Fox end. The cylinder arrangement follows a proven Schnuerle porting arrange­ Throttle Motors, the throttle can he operated from either side and above or ment. Considerable »-xperimenting has been done with the porting to achieve below the barrel. The cover over the front hearing protects it from dirt and a setup that will give an almost flat power curve over a fairly wide range of grime. The con rod is now bushed on the lower end. The Fox Eagle has two mixture. What this means, of course, is that if your bladder fails to maintain conventional type rings with the result that cranking com pression is proba­ constant pressure your engine still doesn’t sag on you in a match. The bly better than any other 60 on the market. The Fox Eagle 60 is also tighter Combat Special is also &uited for free-flight models and rat race type m odels. weight than most 60s and can often be used in airplanes planned for 45s It should be clearly understood that the Combat Special is not a motor for without any balance problems. Furthermore, remember that when you fly beginners and it was not intended to function on a conventional suction type with an American made Fox Eagle you have parts and service as near as your fuel system. te le p h o n e . FOX 36BB Com bat Special 1 3 7 0 0 Fox Eagle 60BB with Suction type needle valve aesem. 16099 with standard pattern type ca rb ...... 2 6 0 9 9 r ^ FOX 45BB FOX MOTORS Bore ...... 850 Stroke . . . .790 D is p ...... 45 with W t...... 12 oz. RPM ...14,000 BALL with 10-6 prop BEARING

The Fox 45BB is brand new for 1975 and introduces a whole new bag of MAIN tricks for the enthusiast to explore. The exhaust stack is round and will accept a 5/8 diameter soft alum tubing extension so the exhaust can be routed at your convenience. The crankcase rear cover is extended upward to form a generous size rear by-pass and make possible a matching front BEARINGS by-pass. Note these are substantially wider than on most Schnuerle motors. All walls on the crankcase caeting are 3/32 thick. The crankshaft is mounted J i · on the same two ball bearings our Eagle and Hawk are and has a more generous gas passage than any shaft rotor 60 we have seen. The flanged carburetor mount, besides providing a more warp free than usual way of mounting the carb, also makes possible a better intake intersection design than possible with a drilled hole. The con rod is machined from alum bar and is bushed on the lower end. The cylinder has been carbonitrided and is virtually wear proof. The piston is cast aluminum and is fitted with a single Hi-tcnsion ring that has been specially processed for a perfect cylinder fit. FOX HAWK 60 The Fox 45BB will fly a plane about as fast as most loop scavenged 60's. It weighs less, is smoother running, bum s less fuel, and costs less. The use of a 10” prop helps ground clearance problems. The Fox 45BB runs very nicely on FAI Fuel, yet will utilize nitro fuels to full advantage. W e think our Fox 45 Bore ...... 907 is the highest state of the art offered today. S tro k e ...... 937 FOX 45BB - Suction Needle valve aeeem ...... 1 4 6 0 0 Needle valve aeeem. for pressu re ...... 1 4 7 0 0 Disp ...... 604 T h r o t t l e f o r p a t t e r n f l y i n g ...... 2 4 6 0 0 W t ...... 15 oz. T h r o t t l e f o r r a c i n g ...... 2 4 7 0 0 RPM ...... 13,500 with pattern car­ buretor and nar­ row blade 11-7 prop FOX 78 RPM ...... 23,000 with large throat carburetor and 9-7 B ore...... 1.00 racing type prop Stroke ..1.00 D isp ...... 78 Wt. ....1 9 oz. RPM ..13,500 with an 11-8 prop 10,000 with a The new Fox Hawk 60 is undoubtedly America’s finest pattern 60. In 15-4 prop matters of power, fuel draw, smoothness and life, the new Fox Hawk 60 is equal or superior to the glam orous imports selling for $ 150.00 or m ore. Every part has been made carefully and attention has been given to make it look attractive as well as function well. For instance, the cylinder head is made from bar stock and anodized an attractive red. The cylinder section is made with integral steel fins, which make the cylinder liner so stiff that there is very little likelihood the cylinder liner can warp out of round in com pression areas. The cylinder liner itself has been nitrited and is file hard. The piston is made from a very special ultra-hard low expansion aluminum which is manufactured under patent protection. Each piston has more than twice the strength of ordinary aluminum pistons and has an expansion rate compara­ ble to that of iron, which makes it possible to fit the piston itself m uch closer with no seizing problem should the motor go over lean. If the motor does go The Fox 78 started out as a 74, ten years ago. Over a period of years the over lean about all that happens is that you lose pow er and perhaps burn out a stroke was increased to make it a 78. The by-pass was deepened. The 3 glow plug. The connecting rod is machined from bar and is bushed on both by-pass ports becam e 4. The piston was re-designed several times as was the ends with bearing bronze material. The wrist pin is retained with large crankshaft. The old 2 plug head was abandoned in view of today's reliable aircraft style snap plugs. Another important feature of the Fox Hawk 60 is its glow plugs. A great deal was learned about Gts. remarkable capability to put out as much power on alcohol fuel as most Today’s Fox 78 has more torque and power over a wider RPM range than ordinary engines do on nitro mixes. You will find that the Fox Hawk 60 will any comparable motor. It is light enough to fit in most airplanes calling for put out a good solid 1 V i horsepower on a FA I type fuel. If you do a lot o f flying, 60's - yet has the extra steam to fly hi-drag. power consum ing scale models. the extra few dollars of a Fox Hawk 60 costs can quickly be repaid by the fuel Independent tester Peter Chinn rated the Fox 78 as lop choice in its field. cost savings in burning a lower priced fuel. O f course, if you do want to burn Fox 78 with auction type needle valve assem ...... 1 7 8 0 0 more expensive fuels such as Missile Mist, then you really do have a world with RC type carburetor ...... 2 7 8 0 0 b e a te r . Fox Hawk 60 BB with needle valve aeeem for suction .16100 with carburetor for pattern flying .. 26199 with oversize carburetor for racing . 26198 FOX MOTORS with CAST

FOX 15 FOX 19

Bore ...... 590 B o re...... S tro k e...... 540 Stroke ...... 600 Disp . . . .15 (2.5 cc) D isp ___ ...... 19 W t...... 4 oz [ t/ Wt ...... RPM ...... 12,000 RPM . . . ..15,000 [Λ λ. with an 8-4 Prop _ with an 8-4 prop

This outstanding little motor has born manufactured now over ten years This is the third year of production for this new series Fox 19. During these with only minor modifications. Its success has been so great that a whole three years of production it has been rated by independent testers as the family of 15 sized profile m odel kits have been produced around it. The main most powerful of all bushing 19’s and equalled only by a couple o f double ball bearing is a full Hths inch in diameter and the engine is ported generously bearing 19’s whose price is more than twice that of the Fox. However, throughout. The piston is machined from meehanile bar and the cylinder is remarkable power output is only one of the things that make it such a from leaded steel. The newest series features an improved needle valve desirable motor. AU the functioning parts are generously proportioned and with normal use you can expect well over 100 hours life. Under crash assembly which can be readily replaced in the event one of your landings is conditions it survives remarkably well. In the event you really give it a rough less gentle than you had planned. The main bearing is cast SAE 660 bronze landing you will find it the easiest motor to disassem ble and repair you have which wears longer and has less friction than powdered metal bearings. ever worked on. The carburetor flange mount is distortion free. The cylinder Fox 15 with Suction Type Needle Valve Assent ...... 1 1 5 0 0 liner is thick and sturdy. The crankshaft main is a full 7 /16th inch in diameter. The motor starts very easily. The weight is light enough so that it will fit readily in most airplanes designed for 15’s and give you the extra power necessary to get it off grass or drag an overweight airplane around.

Fox 19 with Suction Type N eedle Valve Assem ...... 1 1 9 0 0 S t a n d a r d t y p e R . C . T h r o t t l e ...... 2 1 9 0 0

FOX 35 STUNT FOX 36

B o r e ...... 800 Bore...... 800 Stroke . . . .700 Stroke .715 D is p ...... 352 Disp .. .359 W t...... 6Mt oz W t.. .7Vi oz. RPM ....9500 RPM 11.000 with 10-6 prop with a 10-6 prop

The Fox 36 powerhead is a direct descendent of the Fox Blackhead Combat Special introduced in 1957. Through the years minor modifications have been made to each part as experience dictated. Today’s 36 features a The Fox 35 Stunt is probably the most successful model airplane motor of full half inch diameter main bearing, meehanite piston, leaded steel cylinder all times. First introduced in the winter of 1948, it was skyrocketed into the and of course a Fox one piece crankcase design. The normal carburetion limelight by winning first in the 1949 Stunt Nationals. In virtually unchanged model is ideally suited for sport flying in beginner type airplanes of the form it has continued to win more control line stunt contests than all other Ringmaster, Flight Streak, Magician category, as well as the built up types. makes combined. In the year 1974 the Fox 35 Stunt powered the W orld’s For high performance applications, such as combat or free flight where a Championship winning control line stunt model and powered the first place bladder or pressurized tank is planned, the open throat model is indicated. Open and Junior winners at the Nationals and also powered the Walker Flyoff trophy winner. These fantastic successes are not the result of any This is the same motor except the intake has been chopped and bored and super promotional schemes or luck. This particular motor has running the needle assembly has been replaced with our com bat type needle assem b­ characteristics that make it uniquely adapted to control line stunt. The RPM lies. With the RC version you have a choice of two carburetors — a smaller carburetor is the one that should be used for normal sport type and pattern change with airplane attitude in such a way as to anticipate what the model needs. The Fox 35 Stunt also makes a very excellent beginners engine type flying. The larger type carburetor is useful only where the tank place­ ment is very carefully controlled and the engine is intended to be used in because its low compression ratio makes for easy cranking. For 1975 the crankcase die has been com pletely rebuilt so that the castings arc clean and racing type events. With these applications the propeller should be selected so that the engine will turn right at 15,000 RPM on the ground. W ith A larger accurately made and in addition two small lugs have been provided for an improved type muffler attachment. This muffler attachment is so arranged propeller the carburetor does not function properly. that the muffler can be installed or rem oved within a m inute's time. The Fox Fox 36 With Suction Type Needle Valve A ssem ...... 1 3 6 0 0 35 Stunt is offered in only one configuration and one carburetion arrange­ Fox 36 Large Intake with Com bat type needle for ment. That is the same one that has won over 16,000 contests. p r e s s u r e t a n k o r b l a d d e r t a n k ...... 1 3 8 0 0 Fox 35 Stunt M otor with standard needle valve aesem 13500 Fox 36 With pattern Type T h rottle ...... 2 3 6 0 0 Fox 36 W ith optional oversize throttle ...... 2 3 8 0 0 RONZE MAIN BEARINGS

FOX 25

B o r e ...... 680 B o r e ...... 738 Stroke-----680 Stroke .. .700 D is p ...... 25 D is p ...... 29 W t ...... 6 oz Wt . . . .TVi oz. RPM ...12,000 RPM.. 12000 with 9-4 Prop with a 9-6 prop

The Fox 25’s power output is far greater than you would expect from an The Fox 29 has been in production since 1956, when it was first introduced engine of its size. It will easily fly most airplanes designed for 35 size engines as a r a c in g e n g in e . It w a s q u it e s u c c e s s fu l in d o m in a tin g B s p e e d a n d B p r o to and yet give you the lighter weight and fuel econom y of the smaller displace­ for several years. As years have gone on we have shaped the Fox 29 into a ment. On the other hand if you are visualizing a 15 size airplane going sport type product which is more docile to handle and we have worked som e like a bom b, the Fox 25 fits right into this thinking, as its weight is identical of the temperament out that is characteristic of racing m otors. In the Fox 29 with average 15’s. The difference in power is remarkable The Fox 25’s the throttle version has a longer crankshaft than the control line version to construction is conventional but quite highly refined. The main bearing is a provide the clearance the throttle needs. Therefore, on the Fox 29 there is full 7/16ths of an inch in diameter and is generously ported. The piston is more involved than just changing the throttle to get a throttle or non-throttle machined from cast meehanite bar and the cylinder ie from leaded steel. The motor. The m echanics in the motors, however, are identical — the cylinder, connecting rods are machined from bar. Under normal use you can reasona­ the piston, the rod, wrist pin, head, crank throw, mounting lugs and power bly expect the Fox 25 to give you over 100 hours running time. The flange head dimensions. type carburetor mount has proven to have less distortion than the types held Fox 29 with suction type needle valve aeeem ...... 1 2 9 0 0 in with set screws or clamps, and it makes it an easy switch from one type with large intake and com bat type throttle to another. n e e d l e v a l v e a e s e m ...... 1 3 0 0 0 Fox 25 with suction type needle valve assem bly ...... 1 2 5 0 0 with pattern type RC throttle ...... 2 2 9 0 0 with pattern type RC carburetor ...... 2 2 5 0 0 Γ FOX 40 FOX 45

Bore ...... 800 Bore ...... 850 Stroke___ 790 Stroke . . . .790 D is p ...... 399 D is p ...... 45 W t ...... 11 oz W t...... 11 oz. RPM ...13,000 RPM ...14,000 with 10-6 prop with 10-6 Prop

The Fox 40 Bushing Motor is brand new for 1975 and is chock full of interesting innovations. The cylinder porting follows the new Schnuerle layout. The crankshaft is a very generous 9/16ths diameter. The crank case The Fox 45 is a brand new engine for 1975. It is built in the same one piece is a very rigid one piece casting containing the cast bronze main bearing. The triple bypass type casting as our new Fox 40 and it utilizes the sam e lower end rear cover has been enlarged in a manner that makes it possible to make the parts. The additional displacement is gained by a larger bore. Its power three bypass cores to the dimensions dictated by best engine design, not by output is about equal to the old loop scavenged 60’s of three or four years ago. the manufacturing limitations. This arrangement has been patented and is The advantages, o f course, are that the 45 size engine weighs lees, bum s less not found on any other brand m otors. The castings themselves are very thick fuel, has less vibration, is less sensitive to weather variations or fuel mixes. and sturdy and will withstand a surpirising amount of abuse. Performance- One rather unique feature of the Fox 45 RC is its round exhaust stack. This wise you ran confidently say that your Fox 40 will easily outrun any other was designed with the thought in mind that a soft aluminum exhaust exten- bushings 40’s on the market today and most o f the ball bearing 40’s — all of tion could be readily fitted into it and could be bent around in a m anner mo9t i this with no sacrifice of easy starting or docile performance. The piston is convenient for the airplane builder. The simple, sturdy, patented construc­ made from meehanite metal and has been ground, honed and lapped to the tion makes repairs simple matter if you happen to have a misfortune. A great leaded steel cylinder. The flange carburetor mount provides a quick and d e a l o f th o u g h t h a s b e e n g iv e n to th e d e s ig n o f th e F o x 4 5 fro m a m a in te n a n c e I easy method of varying the carburetion for a variety of specific applications. point o f view. For instance, a moderately rough landing that might bend the W hen fitted with a normal RC type carburetor this engine is ideal for the crankshaft of som e engines would only bend the prop stud on the Fox 45 and medium size pattern type RC airplanes. For control line use intake stacks are this could be unscrewed and replaced at a nominal charge. The patented Fox available in standard diameter, which would ordinarily be used on a control Crankcase is quite heavy walled and is highly resistant to crashes. The line sport model or a wide open throat m odel which could be fitted with a pen cylinder liner and piston both are of substantial proportions and moderate bladder type tank for the highest possible RPM. cost and can be replaced should the need arise. The Fox 45 Crankshaft has a Fox 40 with suction type needle valve aesem ...... 1 4 0 0 0 very generous 9/16ths diameter main bearing which virtually eliminates the pressure type needle valve aesem ...... 1 3 9 0 0 probability of a crankshaft failure or a bearing wearing out. p a t t e r n t y p e c a r b u r e t o r ...... 2 4 0 0 0 F o x 4 5 w i t h s u c t i o n t y p e n e e d l e v a l v e a e s e m ...... 1 4 5 0 0 racing type carburetor ...... 2 3 9 0 0 with pattern type carbu retor ...... 2 4 5 0 0 FOX PRESSURE FOX REGULATOR TAPS The general advantage of a fuel pressure regulator is that you can adjust your high-speed jet for maximum power for takeoff without the problem of the engine going over lean later in the flight or in a prolonged clim bing-type maneuver. This results in more available power and better fuel mileage. Diaphragm pressure regulators have been around many years and have Model airplane motors are assembled by means of screws in threaded been used for a variety of purposes. The Fox Fuel Pressure Regulator is an holes and the nature of our hobby is such that from time to time the threaded adaptation of these well known principles to model size. hole gets burred over, jam m ed, cross threaded or otherwise damaged. A tap The pressure regulator should be mounted as close to the carburetor as is the tool used to thread or re-thread a hole. Taps fall in two general possible. A recomm ended installation on a standard RC Ship would be along categories — hardware grade, where the threads are cut; and precision, the side o f the engine and no further back than one inch from the carburetor where the threads are ground. Hardware grades are unacceptable for model center. For the pressure regulator to work, a special tank producing from airplane use. A precision ground tap usually will cost several times as much PSI to 2 PSI is required. Crankcase pressure will not do this reliably and as a hardware grade but you get a good thread from it. Through a special neither will muffler pressure. We recommend some sort of a balloon or arrangement with Greenfield, one o f the world’s largest producers of preci­ bladder-type tank which has rubber bands or springs around it. Later we sion ground taps, we are offering a selection of sizes and types used in m odel plan to offer special tanks for this purpose. The Fox Regulator is assembled airplane motors. A lubricant should be used when tapping a hole — and it with screws and can be disassem bled for cleaning or inspection or replacing just happens that model airplane fuel is as good a tap lubricant as you can the diaphragm. Also it has an external pressure tickle so that you can push a get. button for a second or two and prime your motor. W e predict that once you discover how completely reliable your engine performs on regulated pres­ sure you will never go back to the old way. T ip Size Where Used Order No. Fox Fuel Preeeure Regulator...... 90505

# 2 - 6 4 Fox 15-19-25 needle 712 64 # 2 - 5 6 Fox 40-45-60-78 Low speed needle 7 1 2 5 6 Carb Plug Screws FOX PRESSURE Idle Stud Screws FITTING # 3 - 4 8 Stunt 35 needle 7 1 3 4 8 Head and rear cover screws for 15-19-25 The Fox Pressure fitting is m achined from 3/16ths inch hex brass bar. It is # 4 - 4 8 Old 36X Needle valve 7 1 4 4 8 probably the smallest and most com pact pressure fitting on the market. W e High Speed Needle offer it with either 4-40 thread« or 6-32 threads. Pressure fittings are nor­ Fox 29-36 RC Carb mally used to pressurize the fuel tank. For pattern type RC m odels pressure Fox 15-19-25 RC low speed needle is usually taken from the muffler housing. For Rat Race type models pres­ # 4 - 4 0 Fox 29-35-36-40-45 head and rear cover screws 7 1 4 4 0 sure is usually taken from the crankcase. Muffler Core Screws 4-40 Thread Pressure Fitting...... 90501 # 6 - 4 0 H. S. Needles for all RC motors 29 and larger 7 1 6 4 0 L. S. needle 29 and 36 RC 6-32 Thread Pressure Fitting...... 90502 # 6 - 3 2 Fox Eagle 60, Hawk 60 7 1 6 3 2 78 RC Head and rear cover screws FOX CARBURETOR # 8 - 3 2 Needle Body Nut For all suction N. V. bodies 7 1 8 3 2 # 1 0 -3 2 Fox 15-19 Prop Shaft 7 1 3 3 2 ADAPTERS #y<-32 Glow Plug THDS. carb barrel nuts 7 1 4 3 2 # Ά -2 8 Prop Shaft Fox 25-29 35-36-40-45 7 1 4 2 8 W e believe that Fox Carburetors are as good as you can buy. They are # 5 /1 6 - 2 4 Eagle-Hawk and 78 prop shaft 7 1 5 2 4 more linear, simpler and more trouble-free than most. Nevertheless there are a host of other good carburetors on the market which you may prefer because of their color, shape, throttle response or because you just happen to have-one. The Fox Carburetor adapters is a simple casting made with a T ip Holder Use Order No. flange that will mount on a Fox Motor and has a vertical hole and two set screws to take the round-type carburetor. Due to the wide variety of car­ buretors available and the varying num ber of sizes of stem s, we have elected Starrett #162 C #2-64 #2-56 #3-48 #4-48 72101 to offei* an adapter which can be drilled ojr ream ed out to whatever size you #4-40 #6-40 #6-32 desire. Our A-bane pattern fits our Fox 15. Our B-base pattern fits the Fox 19 and 25. The D-basc pattern fits our Fox 40.45. Eagle and Hawk 60’s and 78’s. Starred #162 D #8-32 #10-32 7 2 1 0 3 Each adapter is supplied with two set screws threaded 6-40. Greenfield #333 #y«-32 #y<-28 # 5 /1 6 - 2 4 7 2 1 0 5 Fox Flanged Carburetor Adapter A size ...... 90601 B s iz e ...... 90602 D s iz e ...... 90604

FOX FUEL FILTERS FOX PROP -— REAMERS τ ' · · - W e believe the Fox Fuel Filter is the finest that you can buy for several r e a s o n s : 1. Our filter element is an ultrafine stainless steel screen. The fact that the element is stainless steel makes it immune to the corrosive attacks of fuel itself. Many fuel filters use a brass screen or bronze powdered metal filter Quite often the propeller that you want to use will have a hole smaller than element that soon corrodes and restrains the flow of the fuel. the shaft size on the motor you want to use it with. The Fox Reamers are 2. Our housing is a threaded two-piece assembly with a nylon gasket that designed to provide an easy, and accurate method of enlarging the hole to the can be taken apart for cleaning repeatedly. Many fuel filters cannot be next standard size shaft size without danger of splitting the propeller or disassembled at all and some filters that are assembled by pressing two getting the hole out of center. We offer two reamers - a standard reamer halves together will becom e loose and leak after awhile. which would be used for 95% of applications and a KB Special, which makes 3. Fox Fuel Filters have large diam eter nipple fittings that are designed to a step from *4 inch to in the peculiar manner that that particular engine hold tightly onto the relatively large diameter surgical tubing or silicone requires. All Fox Reamers are of standard four-flute design and are fitted tubing that is popularly used today. Since no carburetor will function satis­ with a T-bar. They can be carried right in your tool box and used on the field. factorily with fuel dust, dirt, or grass particles or solidified oil, we recom ­ These are a must for the tool box of every serious modeler. The standard mend using a filter on the line from your tank to your carburetor, and another model has progressive steps of from 3/16 to to 5/16 and finally The KB filter in your filler line. The price is so m odest everyone can readily afford the model has a quarter inch pilot and cuts to b e s t. Fox 4 Step Reamer ...... 7020170201 Fox Fuel Filter · sm all...... 90701 Fox KB Reamer...... 7020270202 Fox Fuel Filter - large...... 90702 FOX MOTOR MOUNTS MACHINED FROM BAR

MEDIUM SERIES LARGE SERIES Width Fits Part No Width Fits Part No. 1.217 P o x .29 new 50401 1.475 Fox 50601 Fox .36 new Eagle 60 Fox .35 all OS 60 OS .30 St 51 1.281 Fox -36X all 50402 St 56 Fox.36B B al St 60 Si .35 stunt Enya 60 1.320 K&B 35 50403 Merco 60 K&B 40 1.525 Fox 50602 OS 35 Hawk 60 OS 40 Veco 60 McCoy 40 Webra 61 1.385 Fox 40 50404 Η. P. 61 S T 35 rc 1.640 Fox 74 50603 S T 40 rc Fox 78 Webra 40 ST G-60 The Fox M otor Mounts are lighter, stronger, and m ore rigid than cast mounts or ones made from fiberglass filled plastic. Since vibration is directly related to the rigidity of the motor SMALL SERIES mount, a Fox Mount is more desirable. In the event that you make a crash landing, if a motor is supported by a good sturdy Fox Width Fits Part No. Mount the crankcase is often saved: whereas a weaker mount that will give away first on one 1.000 Fox .15 50201 mount and then the other, twists the crankcase. An advantage of the Fox Mount over wood O S .15 mounts is the ease in which thrust changes can be made. If I he mount is attached to a fire wall 1.135 Fox .25 50203 with blind nuts in back all you have to do is to loosen the four screws from the front and insert ST .19 a shim under the top or sides. In this way very precise thrust adjustments can be made. ST .23 OS .19 1.217 Special for 50204 Fox 35 Stunt

FOX SPINNERS — THE WORLD’S FINEST

CONVENTIONAL SUM JIM CONICAL STANDARD Moel modeler* agree Fox Spinners are the world's finest. They are machined from OIA solid aluminum bar with the wall thickness varying from the back plate to the nose CONTOUR NO. CONTOUR CONTOUR SHAFT SIZE piece according to the strength requirements. Since they are machined from bar they run true and have no balance problems. They were designed primarily with the 1Vi 60106 60206 60306 10-32 thought in mind that more and more people are using electric starters, and most low 1% 60107 60207 60307 10-32 coat spinners will not stand up to the beating they get from a starter. 2 60108 60208 60308 '/4-28 For 1975 wr have added a new contour which is similar to our conventional contour 2

PROP SHAFT EXTENSIONS

Prop Shaft Extensions Fox has made a specialty of prop shaft extensions. W e have evolved a light weight, com pact spool design and a special nut and washer design that will fit right on your prop shaft and move the propeller either one half inch or three quarter inch forward. Vi Long 10-32THD No. 90410 Also with Fox Extensions you can fit a Fox Spinner on your motor. In effect, this gives % Long 10-32THD No. 90411

you three different possible front end lengths — stock, V i inch overstock and H in ch Vi Long V4-28THD No. 90412 overstock. Think how many times you have juggled a motor block cutout or had badly V* Long V4-28THD No. 90413 fitting front ends when a little extra length on a propeller shaft would have made things Vi Long 5/16-24THD No. 90414 V t Long come out smooth. 5/16-24THD No. 90415 FOX 40-40 FOX MISSILE MIST DUKE’S FUEL FOX SUPERFUEL

As its name indicates. Fox 40-40 is 40% Fox Missile Mist is our finest general 10% Nitro 22% Oil Duke’s Fuel is a Fox Superfuel formula is basically 5% nitro methane and 40% alcohol. The re­ purpose fuel. It contains 25% nitro and popular middle o f the road formula pre­ nitroand 28% oil, which makes it the most maining 20% is a mixture o f natural castor 22% oil. However, it far out-performs the ferred by many for use for radio control oily fuel on the market today. This for­ oil with a small percentage o f Ucon type normal 25% home brew. One reason is flying as well as control line flying. The mula was first introduced in 1952 and has synthetic to keep the carbon deposits that the nitro is a mixture o f nitroethane excellence o f Duke’s Fuel is not due to any remained unchanged over the years. Fox down to moderate level. Most people use and nitro-me thane, in a proportion that secret formula but rather is due to the Superfuel is unexcelled in its applica­ 40-40 as an additive to a mild, low cost fuel runs as well on a hot day as on a cool day. quality o f the oils used and the fact that tions. mix when they need a little extra glow plug Furthermore, nitroethane is one of the Fox fuels are consistently true to their BREAK IN - Fox Superfuel, gives any heat or a little extra oomph. However, most powerful solvents known and a formula. The oil used in Duke's Fuel is a new motor extra protection against galling straight 40-40 is an excellent competition motor run on Missile Mist will have very blend o f choice natural castor oil and what and wear during those important first few fuel in itself where performance is the little carboning or gumming problems, is probably the most expensive synthetic runs. primary consideration and price is only even with an average type muffler. oil used in model fuel today. Duke’s Fuel MOTORS WITH WORN CYLINDER secondary. We recommend that all seri­ Another remarkable feature of Missile is backed with 36 years of flying and ex­ AND PISTON FITS - The extra viscosity ous modelers carry a can o f 40-40 with Mist is that your engine can be set quite perimenting with model airplane fuels. of Fox Superfuel will often hold compres­ them so they can give their regular fuel rich and the r.p.m. will drop off a smaller PINT ...... 30202 sion and extend the practical life of a mix a little extra help on those off days. O f amount than other fuels of comparable QUART ...... 30203 motor long after it will not run satisfactor­ course if you are flying serious combat, nitro content. A simple switch from a less­ GALLON ...... 30205 ily on lesser fuels. iťs wonderful to pull 40-40 out of the bag er fuel to Missile Mist has solved more DRUM ...... Special Order EVERYDAY FLYING - A great many when you find yourself matched with a engine running problems than you would motors just run better on Fox Superfuel. red-hot opponent. ever imagine. PINTS ...... 30102 QUARTS ...... No. 30403 PINTS ...... 30302 QUARTS ...... 30103 DRUMS...... On special order QUARTS ...... 30303 G A LL O N S...... 30105 G ALLO N S...... 30305 DRUMS ... .On Special Order DRUMS ... .On Special Order

niiyp n n 5305 t o w s o n · f o r t s m it h , a r k . 72901 FOX MANUFACTUHIIIU If II· Phone 501-646-1656

FOX WHEEL FOX COLLARS SILENCERS Fox Wheel Collars are run in our own shop specifically for model airplanes. One feature of our 1975 Fox Wheel Collars is the set screw, which is a #6-40 thread. This is a finer thread than generally used and holds better. The cup on the set screw indents the piano wire and gives a firmer bite. Another feature of the Fox Wheel ( ’ollars is that the outer collar is closed and rounded off in an acorn nut type manner. This covers up the jagged wire end you so frequently see on an otherwise beautiful model. For those modelers who like to have wheel pants. Fox has a flanged wheel collar design, so rigged that a plastic wheel pant can be held onto the collar by means o f a couple o f small self-tapping screws supplied with the set. Wheel collars, of course, do have other uses also, such as positioning the height of nose wheels, retracting gear mechanisms, bomb-bay doors and the like.

TYPE W IR E SIZE PART NO. FLANGED WHEEL COLLARS

2-wheel regular 3 /3 2 90331 TYPE WIRE SIZE PART NO. 3-wheel regular 3 /3 2 903 32 90341 2-wheel regular 1/8 2 -w he el 1 /8 903 43 3-wheel regular 1/8 903 42 We are currently offering Fox Silencers in the open or closed front 3 -w he el 1/8 9 0 3 4 4 2-wheel regular 5 /3 2 90351 mfiguration in the A and B size and the closed front only in die C 2-w he el 5 /3 2 903 53 3-wheel regular 5 /3 2 90352 ic. We have decided to not offer the flow through in the C size 3 -w he el 5 /3 2 903 54 t 2-wheel regular 3 /1 6 90361 because the larger size motors really require the more effective 3-wheel regular 3 /1 6 903 62 muffler in order to keep the neighbors somewhat pacified. You will ibserve from the picture that our new series mufflers have studs so hat the muffler can now be mounted from the by-pass side of the engine by means o f two long screws, or from the exhaust side by FOX GARNET FOX LUSTROX mean* o f two short screws in tlir «tuds above and below the stack. In his way you have two different options of how your muffler is Fox Garnet is a Lustrox actually is a super-fine no unted. natural product and is a polishing compound with flakes so material we have found small that they can float in between to be most successful normal running bearing surfaces for hand lapping mec­ and not touch either side. It has a SIZE WT. RTS STYLE PART NO. hanic pistons to steel polishing effect when a high spot on cylinders. It should be a crankshaft, for instance, hits a A 1 -1 /8 oz. Fox 15. Open Front 90211 mixed with oil into a paste form and high spot on the bearing. W e regularly use a small Closed Front 9 0 2 1 2 rubbed over the piston and then the quantity of Lustrox on all of our new motors with bushing mains and lapped pistons, us we have found B 1 -3 /8 oz Fox 19 Open Front 90221 p is to n c a n b e la p p e d in to th e c y lin d e r . that a motor which has been run in on Lustrox will last Fox 25, Fox 29 Closed Front 902 22 W ARNING: It should not be put into much longer. To use it. mix it with oil into a thin paste Fox 35 Sluní the intake of a running m otor or else in and dab a little bit into the intake o f your m otor while Fox 36 a few seconds time your motor will be running. After a minute or two the residue com ing out C 1 -5 /8 oz. Fox Eagle 60 completely ruined. the exhaust should change from black to white. At this Fox Hawk 60 Closed Front 902 32 Fox Garnet ...... 90812 point Lustrox has done its work. Fox Lustrox .90811 Ron Davis won Wakefield at the N.W. Semi- Finals, Labor Day Weekend, w ith this model. as such, swiveling on a pin. To get the remove oil that may have deposited on 3. Wing and Stab Jigs: From Ed Tur­ spring tension needed, the front part of it. ner comes the following suggestions. the casting is o f smaller diameter. A saw 2. Nordic Timer Start: The SeeligWhen water-doping tissue or silk, lay cut is made on the side to free it, and timer is a wonderful device . . . accurate, down 2 layers of newspaper on your the thing is sprung away from the spin­ positive, and very dependable . . . except jig or workboard. Weight the wing panels ner back plate by a cam. The stopping the thing is difficult to rig a Nordic timer or stab with lead weights. This will keep action is very smooth. One thing to to start upon towline release. Craig the panel flat (or with planned warps). watch out for is the prop-loosening ef­ Cusick suggests using monofilament line After the tissue dries, you can lift it fect o f any brake. Since fiberglass and slipped through a hole in the bottom o f right o ff the paper. epoxy props are notorious for this, after the fuselage, with an aluminum guide Store stabson 1 inch or thicker styro­ a run or two the prop should be re­ tube epoxied in place. Pushing the mono­ foam with thin corrugated cardboard tightened, as the resin does give a bit. filament line through the tube so that over the stab with rubber bands holding Additionally, the brake arm has been it interrupts the butterfly vane, which it down. found to be a bit too close to the prop, also stops the timer, does the trick. HINT, KINK OR TIP and unless it is closely restrained, it can Enough line should be provided so that I never know how to title this one, go into the prop and be sheared off, it doesn’t accidentally slip out under but here's a good one for you for this when the timer releases it. A new arm tow. Another variation o f this system month. Those o f us who fly in wetter can be made of aluminum or magnesium that I have seen is to continue the hole conditions and who persist in covering to replace the original. The new arm through the top o f the fuselage, so that our models with tissue or silk, know the should have a bent-in "dog leg” toward the monofilament continues past the effects of dampness on the tissued sur­ the rear of the brake so that when totally vane through the hole in the top. This face. The appearance is like that o f a released, it cannot move into the prop guarantees that the timer is stopped . . . colored prune. This effect can be cared arc. After a few runs, the brake shoe simply by visual checking to see whether for by many coats o f dope, putting on should be cleaned with a solvent, to or not the line is out the top. a top coat o f clear epoxy paint, or by DARNED GOOD AIRFOILS - Go 801 and Go 803

STATION 0 1.25 2.5 5 7.5 10 15 20 30 40 50 60 70 80 90 95 100

UPPER 1.2 3.8 5.15 6.8 8.0 8.9 10.2 11.1 11.8 11.6 10.75 9.45 7.7 5.5 3.0 1.7 0.4

LOWER 1.2 0 0 0.2 0.4 0.6 1.0 1.4 2.0 2.2 2.1 1.95 1.6 1.1 0.5 0.2 5 0

Go 803

STATION 0 1.25 2.5 5 7.5 10 15 20 30 40 50 60 70 80 90 95 100

UPPER 1.3 - 4.5 5.9 7.1 7.9 9.0 9.6 10.1 10.0 9.3 8.1 6.5 4.7 2.7 1.7 0.5

LOWER 1.3 - 0.1 0.55 1.3 1.9 2.7 3.4 4.4 4.9 5.0 4 .8 4 .2 3.2 1.8 0.9 0

NOVEMBER 1975 47 48 íMoroic T jivier Start iue 1 Figure M R A E L A E - B H O / T C A O N / E A E B S E O / V O E P Y R O M E M C / T S A L E H/ D R E H S HA/! O H E O , T E S N E H W E ngine - v h a s

PRODUCTION

B t o l s rake

D E D L O M OS/NO N / S O O H AST/C / T S A L E M R A OE BUILDER MODEL LAST/O / T S A ’L

S t a s s t q r a o e W /o 350 the longer it will fly. Turbulence On evaluation o f profile charts, one soon discovers that the optimum power 300 factor occurs at higher angles of attack, i.e.: at higher lift values (see Fig. 1). This is the reason that one prefers air­ foils with relatively high values o f CL max for use in gliders. When one now checks the power factors o f the airfoil sections under discussion, the results come as a surprise. For sure enough, the best one is not the thin Go 795, but the thicker Go 796, with its CL max o f approximately 1.12 (both these sections were featured in the October issue o f Go 803 MB). Its optimum value is only slightly 50 ------1— 1— 1------—— ------I—— I— better than the one for the Go 795. 0 2 4 6 8 10' Models equipped with these airfoil sec­ Angle of attack ------>> tions should fly longer. . . at least in Fig. 1 — Power factors of four theory. airfoils compared. BOUNDARY LAYER spraying the whole thing with Scotch- There are two principal airflow con­ Fig. 4: Go 803 Gard. This latter method was demon­ ditions which occur in the boundary Wind tunnel test data. strated to me by Gene Jensen at the layer, and both have their distinct ad­ there is not a pressure rise to cope with recent Tacoma Semi-Finals. The result vantages and disadvantages. The turbu­ at high angles, in fact, the opposite is lent boundary layer, with its slight vor­ is very effective. The only thing to true, and the boundary layer is generally remember is to do the spraying before tices is, for example, advantageous be­ in the laminar state. The skin friction cause o f its ability to transport energy the tissue gets damp and to allow several of the laminar boundary layer is approx­ hours for the Scotch-Gard to dry. It imately one-half that of the turbulent works. boundary layer, and is thus very low for AIRFOILS FEATURE, PART II the lower contour o f the airfoil, unless Last month, I began this treatise on it is induced to become turbulent airfoils, excerpting from several studies through badly finished wing surfaces, conducted by various individuals. This corners, ridges (spars, leading and trail­ month, the second of three parts is ing edges, etc.). presented, along with 2 selected airfoils On airfoils with highly concave bot­ used in the tests. tom contours the laminar range is re­ The Power Factor. When sinking stricted to relatively high angles o f at­ speed is considered, the lower the rate tack, say from plus or minus 4 degrees o f sink, the higher will be the duration upwards, and only then is its effect on of the flight. It is the ratio of altitude the overall drag o f the airfoil noticeable. lost during flight to the latter’s duration. At low angles of attack, separation of From the aerodynamic point of view, the boundary layer must be expected sinking speed is mainly governed by two on the bottom o f these sections aft o f factors... wing loading and power fac­ the leading edge, creating a strong ten­ tor. dency to dive. It should be clear that the Power factor is defined as the ratio drag o f flat-bottomed airfoils, which at o f the square o f the drag coefficient and angles o f attack as low as 0 degrees still the cube of the lift coefficient. This is a show an extended laminar boundary at very small fractional value, and is ex­ the bottom surface, is smaller. Conse­ pressed as CL3/CD2. The larger this Fig. 3: Go 801 quently this part o f the airfoil should reciprocal power factor, the lower will Wind tunnel test data. Continued on page 71 be the sinking speed of the model, and from the adjacent flow to the upper surface o f an airfoil. It is thus capable of preventing separation o f the airflow by a pressure rise, which takes place near the trailing edge of an airfoil. In other words, airfoils with turbulent boundary layer over the upper surface o f the sec­ tion attain higher lift coefficients than those where the boundary layer is lami­ nar. Hence one tries to create a turbulent boundary layer over that part of the upper surface, where a pressure rise is bound to occur. If, at very low Rey­ nolds numbers, turbulence o f the bound­ ary layer cannot be induced by the shape of the airfoil itself, then turbu- lators are used for this purpose (wires, surface spars in front o f the airfoil high Fig. 2 — Suggested leading edge point, strings glued to the covering, etc.) construction methods - On the bottom rear surface of the airfoil, things are quite different. Here "T h e flig h t is th e re w a rd ."

NOVEMBER 1975 49 PHOTOS BY AUTHOR AND EDDY FLOCK Weeds in background w ill cushion landing . . . if it misses car! misses it if . . . landing cushion ill w background in Weeds N USE IN S T C U D O R P Tense m om ent . . . the a u th o r lights fuse fo r th e firs t test flig h t. t. h flig test t firs e th r fo fuse lights r o th u a the . . . ent om m Tense ok e De 09 n x mount. n u o km n a T ox C on .049 Dee Tee tock S Competition Models' Half-A “ STARDUSTER" meets Satellite City's City's Satellite meets STARDUSTER" “ Half-A Models' Competition E ddy F lo ck, converted R /C er, lights fuse on his S tarduster. It fle w "rig h t o ff th e b o a rd ." ." rd a o b e th ff o t h "rig w fle It tarduster. S his on fuse lights er, /C R converted ck, lo F ddy E O ." F F U T S HOT “ 50 Pen bladder tank held by " T " pins. Address label cut fro m plans. plans. m fro cut label Address pins. " T " by held tank bladder Pen l ufcssrih ... n rs needed. arps w no . . . straight surfaces ll A ___ yJA ANDREWS. JEAN By Classic p ro file . Stab t ilt fo r le ft glide helps S tarduster tu rn in lift . . lift in rn tu tarduster S helps glide ft le r fo ilt t Stab . file ro p Classic aiy l, aiy rmmed, efc competton hp or novice. r fo ship n titio e p m o c perfect , d e m trim easily ilt, u b Easily wo fi s. t DT hardware. T D ote N . ts h flig o tw Tw o small trim tabs needed fo r clim b trim . F u lly adjusted in in adjusted lly u F . trim b clim r fo needed tabs trim small o Tw • My most recent high-performance high-performance recent most My • started nosing around for something to to something I it. for replace when around nosing California, started Elsinore, at field ing attempt something more advanced. more something attempt npiue t dutn, hud ul a build should adjusting, at ineptitude after hearing all this, and said to myself, myself, to said and this, all hearing after Starduster,” a like climbs It ‘‘ Starduster . the . . to compared were signs not since event have flight free I power a in though placed even grapes, sour iet o of ektig tefo te fly­ the on itself re-kitting f o job ficent e mr Dla at bfr I again I before Darts Della more few singular my to due I, some that including oie ta al h nw n fny de­ fancy and new the all that noticed /A ref gt a js dn a magni­ a done just had Free-fl ight 1/2A 350, Starduster X, and the standard standard the and X, Star- Starduster engines; Starduster f o Half-A 350, quantity for a dusters disclosed porium just lift in forth. so itself and centers Starduster,” one the like This as “ aStarduster,” trim . to . ’saseasy t . I . . . “ “ Self, why not build aStarduster?” build not why Self, “ 94 ad y us ws otne. I continued. was quest my and 1954, hs sgetos ee imse as dismissed were suggestions These ay ugsin wr md t me, to made were suggestions Many qik rp o h lcl ob em­ hobby local the to trip quick A Isat down and had a talk with myself myself with atalk had and down Isat Continued on page 81 page on Continued OE BUILDER MODEL PHOTOS BY AUTHOR This is the current status of a four-year design evolution for a highly competitive model that retains simplicity of construction. The author also explains his effective, but radical flight testing procedure. The "Lunar-tic,” as presented here, is through numerous actual experiments small engine classes than in the larger the current status of a four-year design with varying dihedral and polyhedral an­ bore categories. For the moment, let us evolution to perfect a high-performance gles, decalage and C.G. locations, fuse­ consider as constant the major influences I/2A -A free flight model with a dash lage lengths and moments, stab and rud­ that affect any single flight o f any free o f “ class.” The initial inspiration was to der areas, and various lightweight wing flight model. These might be, "Outhouse develop a model pleasing in appearance, and stab constructions, including geo­ Luck,” Mother Nature, The Thermal as well as highly competitive, that would detic types. It has been this modeler’s Gods, and the lik e . . . we may then be interesting to the experienced free experience that down-to-earth, seat-of- analyze the other variables on which any flight contest modeler, yet retaining suf­ the pants, trial-and-error, wins more given modeler may exercise "positive ficient simplicity to prevent ruling out contests than beer-parlor-paper-theories, personal control,” if he really so desires. those with less talent, plus comparing and consequently, this design has seen To continue with our game plan, let favorably with normal construction time the route of the contest battlefield. us also consider the Cox .049, fuel, and of a conventional 1/2A model. Trailing Hulan Mathies to a second props as constants, then what remains The “ Lunar-tic” is therefore a pleas­ place finish in I/2 A at the 1974 Lake are “two basic controllable factors.” ant divergence from the general run-of- Charles, Louisiana Nationals, stands as These may be categorized as, (1) indi­ the mill 1/2A designs with their solid mute testimony of its contest potential. vidual model design and trim , and (2) slab pylons, power pods, profile fuse­ (Any time I can place second behind this attention to detail. I feel very strongly lages, and squared constant chord wing California "super flyer" ... I feel I have and stab planforms. Yet, it strives to won anyway). marry conventional 1/2A model con­ After thirty years of active competi­ struction with just enough streamlining tion, I would suppose I should be per­ and complexity to make it an eye-catcher mitted a few basic observations as to on the flying field . . . even before it's what it takes to win. The 1/2A "free- ultimate power pattern attracts even for-all "a t any large meet is typical proof further comment. that the “ professional edge” is more Prototype models have progressed difficult to attain and maintain in the

First flight launching technique, takes model immediately away from ground hazards.

NOVEMBER 1975 51 CJ1 N) FULL SIZE PLANS AVAILABLE - SEE PAGE 88 MODEL BUILDER Detail of the stab hold-down, which goes through 1/16 I.D. alum­ Fuel tank filler and vent tubes come out through the leading edge of inum tubing into the fuselage. Yep, that is "d e ta il!" the pylon. Fuel oulet located conveniently for Tatone timer. that these two areas separate the men I prefer to think that this was more step description as to where the pins go from the boys. . . the winners from the closely related to ‘Attention to detail' would be a bit hypocritical. I will hereby losers. rather than ‘ luck.’ attempt to refrain from being overly Model design and/or trim theories get One may then conclude that the rea­ elementary in explaining this model’s banged around at every club meeting son one o f two identical model designs assembly so as not to insult anyone’s or “ hangar flying” session. Numerous flies well and the other bombs out, may intelligence. books and magazines hold a wealth o f simply lie with the initial model prepara­ I should like to note in the beginning detailed experience and technical know­ tion, plus the whereabouts of the mod­ that should you desire a very light mod­ ledge on this and associated subjects. I eler’s momentary frame o f mind when el, you may easily substitute 1/20 sheet do not profess to offer any new, world­ placed on the gradient between "pa­ for 1/16 sheet for the pylon planking, beating theories here, except to note tience” and “ panic.” stab, and/or some or all o f the wing ribs, that most o f the reference info appears I offer this analogy to suggest that and all gussets. Slanted tip ribs may also to be presented in “ general” terms ra­ the modeler himself may well be his replace the soft balsa blocks. I show ther than "specific” terms, and that it own worst enemy, and the measure of 1/16 sheet here, as 1/20 sheet is not is my belief that proper power trim any particular design’s success on the available to all, and I personally prefer varies greatly with each specific model trophy trail may be more with him ra­ a medium weight model o f 6-1/2 to 7 design. This stated, simply means that ther than his equipment. A self-psycho­ ounces, and they appear to better pene­ using your favorite power trim set-up analysis o f your personal competition trate midwest surface winds. Modelers on all o f your models, regardless of procedures might produce some rather in locales fortunate enough to have an design, just because you have done it interesting results for you. abundance o f dead air competition may that way for years, does not necessarily So, start over with a newly built have a desire for a lighter craft. mean you are milking all the potential “ Lunar-tic,” coupled with proper model WINGS possible from your particular model de­ preparation and a disciplined flying pro­ I prefer to completely finish both sign. cedure. You may well be amazed how the wing and stab before even starting Power patterns, whatever theory they fast your trophy shelf starts to fill. the fuselage; this is habit, but does per­ represent, perform one single function, As previously stated, the “ Lunar-lic’- mit continual checking of alignment and and that is o f getting the model as high project initially aspired to attract the the C.G. location during the fuselage as possible on the alloted engine run. attention o f the modeler with competi­ construction. „ . , Continued on next page. Aligning the proper power theory with tion experience. Therefore, a step by a given design is the real task. The “ Lunar-tic” design is no different, in that a definite power trim has been developed which would appear to sap the most from this design. It follows at the close of this article. Hand-in-hand with “ model trim ” goes our second basic controllable variable and that was “ attention to detail.” Wing and stab warps, side thrust, down thrust, rudder tab, proper wing and stab keying and alignment, C.G. location, correct decalage, dependable fuel system, fail­ safe D-T arrangement, overall model workmanship, etc., if given close atten­ tion in the workshop before first flight testing, will suppress those "test hop jitters” and insure a minimum o f re­ quired field revisions to attain the maxi­ mum power pattern desired. I once field trimmed a new "Lunar-tic" in two test flights on the morning o f a contest and The "posse” returns with two "runaway" Lunar-tics; the author's son, Dan Murphy handles the won first place with five straight maxes. reins, while neighbor Tim Stottlemyer, carries the errant models. NOVEMBER 1975 53 spar filler and 1/16 sheet for rear spar filler. I have found that similar rein­ forcement at the polyhedral breaks is CARR SAILS not necessary, as the front and rear 1 /32 sheet webbing suffices. Complete the 7607 GRESHAM ST. wing construction by cementing the 1 /32 sheet webbing between each rib in the SPRINGFIELD, VA. 22151 locations shown, plus adding center sec­ tion 1/16 sheet planking. Sand the en­ STANDARD CN All. CARR SAILS Finest Amerlean-made DACRON sailcloth. tire wing to prepare for covering. In the Vinyl, press-on numerals and insignia. Heat sealed edges eliminate fraying. beginning, you may have had a some­ Coated,stainless steel Jlbstay installed. what squeamish feeling about building Rolled-edge grommets in tack,clew A head. Bolt-rope mains'1 luff mast attachment. a wing from so many “ toothpicks,” but

Santa Barbara - $30.00 10-Rater - $30.00 note that the resultant full depth “ I- East Coast 12-Meter - $30.00 50/800(M-class) - $30.00 Beam” center spar forms a very rigid 36/600 - $25*00 Internat. A-class- $35.00 west Coast 12-Meter - $30.00 Star L5 - $30.00 structure. Vanguard M"-bont - - $L0.00 T&A Petrel - - $30.00 Pre-dope your new wing with two Scale vessels, special purpose boats, one-of-a-kinds: Write for a quote, and for our 1975 Brochure and Used Sails List. coats o f fuel-proof dope, cover with Jap­ anese tissue to your favorite color diagonal ribs for the top spars before scheme, and brush on a sufficient (PEΛ ΡΟΟΛ cementing in place by simply "eyebal­ amount of dope to seal the covering. 06SIGNED BY ling” a match with your tailored bottom Use relatively thin coats of dope, and Tom Protheroe spar notches. Again, omit notching the more coats, to prevent warping and to diagonal and short ribs for the ta b u ­ speed aging. AM Y A lators for now. O f course, delete the STAB CLASS centerline and polyhedral break ribs Again, start by cutting out the ribs 3 6 / 6 0 0 "WA” for the moment. The 45° angles from medium weight sheet stock and on the soft balsa tips are a snap. Simply notching only the straight ribs, as per cement soft 3/8 sq. stock in place. After the wing. Pin to the plans the 3/16 sq. the wing tip panel is removed from the L.E. and 1/2 inch wide tapered T.E. plans, carve and sand a flat plane to the stock, plus the 1/16 x 1/8 bottom main diagonal across the corners o f the 3/8 spar. Utilizing the same procedure as sq. section. Then carve and sand the lop was used in constructing the wing, notch to conform to the top of the airfoil, the T.E. appropriately, and cement all you will then end up with a perfectly stab ribs in place. Cement soft 1/4 x curved tip. Construct all four panels at 3/8 strips on the ends for the tip blocks. once and when cement has set, carefully Notch the diagonals using the straight remove only the tip panels from the edge method, and add the two top strips plans. o f 1/16 X 3/32 and single 1/16 x 1/8 Now fit and cement the tip panels spar. After this assembly is completely to the inner panels, incorporating the dry, carefully remove from the plans and

WRITE or CALL 3-1/4 inch polyhedral angle and add the gussets and planking as shown. Carve 213-661-7928 $29.95 1/32 plywood dihedral brace “ W K"and the tips in the same manner as was done FREE CATALOG rib "W A ” at this time. Follow by now on the wing tips and sand the entire KIT FEATURES adding the top spars to the wing tips stab to prepare for covering. Covering • COMPLETE SAIL CONTROL MECHANISM • MACHINED WOOD AND METAL PARTS only. The 1/16 x 3/32 turbulators may instructions are the same as for the wing. • COMPLETE BASIC HARDWARE PACKAGE be added more easily after complete PYLON • ALL r i g g i n g λ a f u l l s a il PLAN • A BASIC COURSE IN SAILING assembly of the wing and after it has Construct the pylon frame over the been removed from the plans. This is R'C SAILPLANES Λ ACCESSORIES plans by pinning down the 3/32 x 1/4 accurately accomplished by laying a spruce wing-retaining rail and remaining AVATAR 72 $ 3 2 .95 CURIO « 4 4 .9 5 straight edge between the notched end 3/32 X 1/4 balsa strips. The 1/16 ply­ HI-STARTS - PARACHUTES-RUBBER ribs of each panel, aligning it with the wood rear profile part is shimmed up DEALERS Λ DISTRIBUTORS STD. TERM proper notches, marking the notch loca­ 1/64 from the plans, which o f course, M S LIMITED I tion and cutting angle on each rib in is to position it on the centerline o f the P.O. BOX 30740 L.A. c A . 0 0 0 3 0 f between with a sharp razor blade, then pylon frame in the top view. With this carefully cutting each notch. portion o f the pylon frame still pinned Remove both newly constructed wing to the plans, cement in place the right Continued from previous page. halves from the plans and join them hand 3/16 x 1/8 upright and the two First, cut out all wing ribs from me­ together at the centerline, incorporating pairs o f contour parts " P I” and "P2.” dium weight sheet stock. Cut all not­ the 3/4 inch dihedral for each panel. After cement has dried, carefully remove ches as shown into the straight ribs WA, Cement the 1/32 plywood center brace the assembly from the plans and add the WB, and Wl, but do not notch any of “ WJ” in place with the remaining "W A ” left side parts. Do not plank the pylon diagonal or short ribs at this time. Pin the rib. Add the top spars of 1/16 x 1/8 and as yet. Construct the wing platform of 1/4 sq. L.E., 1/2 inch wide tapered T.E. 1/16 sq. to the inner panels and when 3/32 sheet and add the 1/16 x 1/8 stock, and two lower spars of 1/16 x cement has thoroughly dried, remove spruce wing rails as shown. Cement the 1/8 and 1/16 sq. to the plans. The wing the entire wing from the plan. Add the platform securely to the pylon frame. tip T.E. taper is accomplished by simply 1/16 X 3/32 turbulators, by the method Set this complete assembly aside until cutting o ff the thick edge o f standard described, and the 1/16 sheet gussets in the fuselage box is completed. 1/2 inch wide T.E. stock to be 3/8 inch the locations indicated. FUSELAGE wide at the tip. Notch the T.E. as indi­ Fill the space between the top and The fuselage box is initially of typical cated. Follow by notching and fitting bottom spars either side o f the center- upside down construction. Cut the top the diagonal ribs to match the bottom line rib "W A ” with scrap balsa, out to outline from relatively hard 1/16 sheet spars as you proceed. Also notch the "W B” rib. Use 1/8 sheet scrap for main and pin it directly to the plans as indi-

54 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER PRIZES!

$10,000 S TUCSON WINTER NATIONALS

Marana Air Park, Tucson Arizona November 28, 29 & 30, 1975

HOST: TUCSON RADIO CONTEST CLUB Co/Sponsored by the Following Magazines: R/C Modeler, Model Airplane News, R/C Sportsman, Scale RC Modeler, Model Builder, and Flying Models.

You may drive or fly directly to Marana Air Park, which is thirty miles northwest of sunny Tucson. Ideal Contest Facilities, modestly priced food and lodging, plus an Olympic size pool, all add to the excitement of the 1975 Winter Nationals.

See the world's best R/C Fliers via for the Largest Cash Prices ever awarded in a Non-Restricted Contest. Over $10,000 in Cash, Prizes and Trophies are pledged for this contest. All events will be conducted in accordance with AMA Rules, and excellent judging will be evident thru affiliate with and guidance by the standards of the U.S. Pattern Judges Association. We look forward to seeing you Thanksgiving Weekend.

PLAN NOW TO ATTEND ΓΗΕ LARGEST R/C EVENT OF THE YEAR

EVENTS: A Pattern / B Pattern / D Novice and Expert (Combined) / Standoff Scale / 1/4 Midget Pylon

ENTRY AND PRE REGISTRATION FORM (Please Mail by Nov. 10, 1975)

TUCSON WINTER NATIONALS AMA No. c/o Chuck Taylor, CD Class______Pattern_ MHz 1401 S. Brown Ave. Quarter Midget _ MHz Tucson, Ariz. 85710 Stand-Off Scale — MHz

NAME______ADDRESS______CITY ______STATE Zip

IMPORTANT: Pre-Entry Only. No Entries after Nov. 10, 1975. When Events are full, earliest postmark will determine acceptance. Back-up frequency for 1/4 Midget must be same as primary. Complete info packet will be mailed upon receipt of Pre-Registration Form and Fees. FEES: Ten Dollars ($10.00) Registration, plus Four Dollars ($4.00) per Event.

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 55 READY-TO-RUN ELECTRIC-POWERED THE QUIET WINNER Jerobee "Greenwood Vette" W/PR OPOR TION AL THROTTLE, DYNAMIC BRAKING, LEXAN CHASSIS, REAR TIRES AND WHEELS “ GLUED AND TRUED." Car w ithout ra d io ...... $99.95 Car w ith Jerobee radio . . . $179.95 Car with Futaba radio . . . $219.95 Charging cord fits cigarette lighter — recharges in 20 minutes. Master Charge accepted LEISURE ELECTRONICS 11 Deerspring, Irvine, California 92705 Phone: (714) 552-4540

over this fulcrum point so that the RACEPLANES eventual rear edge o f the wing will locate 1-1/2 inches rearward o f this point. In BETTER this finalized position, securely epoxy the pylon frame assembly in careful THAN A alignment to the top o f the fuselage box. Complete construction by adding the THIRD 1/16 planking on the pylon sides, run­ ning the wood grain vertically, and com­ HAND! plete final sanding. SCALE DWGS Prime the completed fuselage with one coat o f thinned dope, then a thinned Quick easy reference brochure identifying over coat of dope and K&B Micro-Balloons 700 Raceplanes, 1908 to present. mixture. Sand lightly and add another Send 50< for Brochure to·. coat of thinned dope. Cover the entire Available through your dealer. fuselage with tissue to match your color RS HIRSCH 8439 Dale St. Write lor a tree catalog. Dept. 21R scheme. Buena P ark, Ca. 90620 10107 Adella Ave., South Gate, CA 90280 Cement the 1/16 plywood trailing edge stab shim to rear o f the fuselage just forward of the rudder. This will cated. Cement the 1/16 sheet formers thereby preventing screw breakage when probably be a minimum requirement “ A” through “G” in their correct posi­ the screws are eventually removed. Carve and you need as much as 3/32, which tions, and when dry, cement the 1/16 and sand the front end to blend from may be somewhat determined by ini­ sheet sides in place. When cement is the square box cross section to the round tial hand test glides o f the completed dry, carefully remove this three-sided firewall, as noted on the plans. model. box from the plan and finish trim the Fabricate the rear fin from medium Add the 1/16 aluminum tubing for formers o f the open bottom to receive soft 3/32 sheet and cement it in place the D-T line guide just aft o f the stab, the 1/16 sheet bottom plate. Cement on the rear o f the fuselage box. Add the and short strips along the side as needed. the plate in place. Now carefully remove 1/16 plywood stab platform, 1/8 sq. Add snuffer tube and paper clip wire the front square former “ A ” and cement spruce stab stop, and the triangular 1/16 hooks to the fuselage side and to the the triangular balsa wedges inside as sheet top reinforcement strip as shown. slab as the plans indicate. Finish doping shown on the plans. Be sure you have None, or very little stab tilt is required, the entire model. Assemble engine, fuel trimmed the wedges to proper length, as so keep the platform parallel to the wing timer, and associated hardware to the the former “ A ” is to be replaced later. platform. Form the skid from 3/16 sq. fuselage, then assemble the completed Now cut the opening for your fuel spruce and epoxy it securely to the model and add wing and stab keys. shut-off, into which ever side you prefer, front underside o f the fuselage as shown. FLYING and fit it in place accordingly. If an Finish sand the fuselage box and fin This may come as a surprise to you, internal fuel tank is to be used (per­ assembly and tentatively assemble the but you are not quite ready for the sonally I am not yet totally sold on the fuel timer, engine mount, and engine, flying field, as most design articles will pacifier fuel systems for l/2A 's, as so including propeller. state at this point. Remember our anal­ far, the increased engine performance Rubber band the stab to the fuselage ogy on controllable factors of model has not been worth the oily mess), hog and temporarily pin the pylon, per the design and trim? Up to now, we just out the balsa required to receive your plans location, to the top o f the fuselage have a model design. The next step is metal tank and epoxy securely, replac­ box. Now rubber band the wing in place model trim, and I suggest you head for ing former “ A “ as you do. I use a Perfect in place on the wing platform. Carefully the “ kitchen" and not the “ flying field” No. 18 wedge tank, modified as indi­ locate the longitudinal balance point of to instigate this next phase. Build a fire cated. Next, mount the Tatone 1/2A this complete assembly by balancing it under the good w ife’s tea-kettle and mount to the 3/32 plywood firewall and on a single or double edged razor blade wait for the steam to roll. secure it in place with epoxy on the which has been stuck into a balsa block. I have always been amazed by those front of the fuselage box with the The horizontal blade serves as the ful­ who say desired warps should be built mount assembled. Remove the mount­ crum for our homemade teeter-totter. directly into wing panels. Those fellows ing screws and “ Tatone” mount before Next, pull out the pylon pins and must not reside in high hum idity areas the epoxy gets too solid so as to insure carefully relocate the pylon frame as­ of the midwest, or they hold some sec­ against the screws freezing in place, sembly, with the wing still assembled, rets I know nothing about. If I build

56 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER astab flat, it warps. If I build a warp into a wing, after covering and doping, it comes out flat or warped more than ADJUSTABLE SERVO ARM that which I built in. Therefore, since COVERUP! I end up with a “ tea-kettle session” Sturdy, dark green vinyl covered anyway, I just build all panels flat and binders for your valued copies of worry about warping or de-warping sur­ MODEL BUILDER. Gold logo. faces after everything else has been com­ pleted. This is where it counts anyway. No matter how you personally obtain the end result, the stab has to be per­ fectly flat. Make yourself a flat warp board at this time and retain the stab to it at all times when not in use. A slight right rudder warp is desired, which may need compensating later by This accessory will permit you to preset a tick of left thrust. The wing is to have the required arm length to match any about 3/32 washout in each tip; the throttle or control surface movement right hand inner panel is to have 1/16 that is desired. We are now mfg. this washin and the left hand inner panel accessory to fit 9 different servos. Order 1/16 washout. This may sound a bit by Stk. #. troublesome, but we said that “ attention- .984 each to-detail” will pay off. Now we may head for the flying field. Stk. # 3 3 - fits KPS 9 & 10 Only $4.95 each, two for $8.95, or Here again, we will probably do a S tk .$ 4 4 -fits KPS-11 three for $12.95, postpaid in the US. couple of things which differ from your Stk.#45-fitsKPS-12 Canada and Mexico add 30 cents per normal, personal first-flight test proce­ Stk. #46-fitsKPS-14& 15 binder. Overseas add 50 cents each. dures. A right-right power/glide pattern Stk. $ 4 7 -fits World Eng. California residents add 6% sales tax. is desired for the “ Lunar-tic.” First, we Stk. # 4 8 - fits D & R eyeball a check on our tea-kettle session NOTE: One binder will hold 1971 and Stk. $ 5 6 -fits EK 1972 issues. One each for 1973 and 1974. to insure all surfaces meet the afore­ Add .254 on direct orders. mentioned settings. If not, go back home MODELS' and stay there until they do. Second, ROCKET CITY SPECIALTIES we do not put the prop on backwards BUILDER 103 Wholesale A ve., N.E. as most suggest, and third, hand glide Box 4336, Santa Ana, Calif. 92702 Huntsville, Ala. 35811 your model a few times to appraise the amount of shim required at the rear maximum of fifty feet up in 4 to 5 of the stab. Naturally, a slight stall would seconds. It also gives you only 50 feet lime. Coupled with a well disciplined be better at first than too much negative. or less down, and it will seem much less competition flying procedure, your Fourth, we do not throttle back on the if your model is a bit erratic on its “ Lunar-tic” should fast become one o f engine, but run it wide open. Be sure to maiden flight. The engine w ill lean out your favorite models as it has fast be­ set your timer to get about a 2 to 3 anyway before it quits, and may just be come one o f mine. second engine run, and launch only in enough burst to drive your model into GOOD LUCK AND SIC ’EM!!!! · the following manner: Stand with your the ground. back to the wind, hold your “ Lunar-tic" Initial engine and trim settings mean in a perfectly vertical position, up and nothing, as you must continue to change TWIRP...... Continued from page 37 out away from you, looking at its bot­ them as they will affect your model they should not be denied access to tom. Tilt the nose slightly to the left differently as you get braver and increase them fo r this reason, so public libraries, (right of the wind) and simply let go, engine RPM and model speed, turn the school libraries, and a School Commit­ flipping the timer, o f course. prop around, go to hotter fuels, etc. teeman were contacted to see i f they You should get a very fast vertical Sure, you can eventually get there in 8- would add MB to the school and public climb with the slight wing warps and 10 test flights, but your model may library magazine racks. Some have added right rudder twisting the model in a have a few battle scars by then, and this the book, and others will at their next slight right turn and left roll as it goes may be the third or fourth trip to your budget year. skyward (yes, slight right turn, and left test site. People in general have been very co­ roll). If you have seriously completed In comparison, the "Lunar-tic” VTO operative with our program. Perhaps this your homework, your “ Lunar-tic’s” full-power-procedure takes your model is simply a characteristic o f our area o f power trim should be pretty close. Slight higher, directly away from the ground the country, possibly nostalgia has some­ revisions for power trim and stab tilt for sooner, which means it is further away thing to do with it, but I ’m convinced glide should complete your trim proce­ coming down should your workshop trim that the excellent reputation and the dure. be too far off. It is a simple matter of organizational ability o f the 4-H in our Before you order me a padded wagon geometry. Also, in 2 to 3 seconds under county was, and continues to be, an influ­ and an accompanying armless sweat maximum RPM, “ power-to-glide" transi­ encing characteristic in the cooperation shirt, consider this analysis comparison tion is more realistic, eliminating any we have found. As a result, we make to the more popular first-flight testing possible damage from a low speed stall every effort to insure that everyone in procedure o f the backward prop, sub­ into the ground. Final trim should come our group adheres to all the rules any­ dued and short engine run, using mild in just a few test hops on your first one may establish. fuels, and relatively horizontal launch. test field outing. Don’t knock it until In searching for an outdoor flying Fellas, with conventional methods, you you have tried it. site, / had been told by many people are testing a high-performance model in What “ Lunar-tic” building time may that the local private airport was defi­ a mode in which you never expect it to have cost you in the beginning, is more nitely out. / wrote to the owner asking competitively perform. The slow speed than made up in establishing you in a i f we might use the site. In a delightful horizontal launch will get you only a very competitive position in a short letter o f reply, he said, "The airport is

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 57 Trickiest area is at the wing tips. The bottom o f the wing sweeps up to the tip piece, which attaches first to the wing spar. The wing is built flat, and then cracked for dihedral. The directions on the plan say "shim stab in place." This may be confusing and d ifficu lt fo r novices, so an alterna­ tive method was devised. Make a loop o f elastic thread (available where sewing supplies are sold), put it over the fuse­ lage, under the bottom o f the stab, and around the end of the fuselage. Tiny shims (scraps o f balsa) can then be placed between the leading edge o f the stab and the underside o f the longerons until proper incidence is found. The area needing the most practice was in making ribs, but once the young­ sters learned the technique, things went smoothly. The project, / feel, is working well. Similar programs could be run in your area for the 4-H, Scouts, Cubs, Boys Club, YMCA, and so on, or for any group o f kids. You’ll find the kids are interested and interesting, and the learn­ ing process fo r members and the adult leader is pretty much an equal swap. You would be building your hobby and making a contribution to a bunch of kids... and yourself. Everybody gains This All New K&B .35 is specifically designed for all AMA something. Classes of flying where a .35 standard plain bearing engine FUSELAGE is required. The superior performance of this engine will fulfill 1. Use thumb tacks or pins to attach the plan to the building board. everything demanded of it in the most competitive U-Control 2. Cover the plan with plastic food Flying . .. and make you an ACE among your competitors. wrap so that wood will not stick to the Other features include: plan. 3. Cut the top and bottom pieces of "SQUISH BAND" HEAD Like all K&B engines it is tops in its the fuselage (these are called the “ lon­ provides maximum power for size class...you can depend upon it for gerons” ). Soak in HOT water for 20 of engine. power, performance and durability. SAFETY CRANK STUD minutes. Pin these to the plan. DO NOT practically eliminates the possibility See the K&B .35 "Series 75", now, push pins through the wood. Angle the of breaking or even bending the at your favorite hobby shop. pins so they hold the wood down. crankshaft. 4. Pour a small amount o f white glue Send tor your K&B Catalog, "Matched Finish into a little dish or plastic cup, and thin System" Handbook and Super Poxy Paint chart. ever so slightly with a few drops of Include 25* fo cover postage and handling. water. Address to Dept. MW-3. 5. Cut the “ uprights.” These are the pieces that attach to the 2 “ longerons.” aurora hobbycrafts Cut these pieces a little LONGER than DIVISION OF AURORA PRODUCTS CORP they should be. Use an emery board or a 12152 WOODRUFF AVENUE, DOWNEY, CALIFORNIA 90241 sanding block to sand these pieces to the proper length. If any piece comes out too short, replace it. open to the Hying public. Size o f air­ poses, the indoor record is 70 seconds 6. Use a small watercolor paint brush craft is not specified” . .. so we have an under a 22 foot ceiling. This version o f to apply a tiny amount of glue to both outdoor site! the plane was built with light weight ends o f the “ upright” and to the "lo n ­ But on to the “ TWIRP. ” The word (but not indoor) wood and was covered gerons” at the spot where the “ upright” refers to something silly, according to with regular tissue. is going to be placed. LET THE GLUE Webster's, but things which may be or There are one or two places in this DRY. When it is dried, once more brush or look twirpy can often fool this first plan where decisions have to be made. a small amount o f glue on the ends of judgement. Our "TW IRP” flies,generates The aft cabin roof and the wing trailing the “ upright” and pin the “ upright” in the blush on the mind, and is apparently edge pieces at the tip, are curved. This place. By using this method, you will forgiving of all the different "building was done to introduce forming o f balsa get a strong fuselage that is light in techniques" youngsters can generate. by soaking it, wrapping it around a weight. Covered in everything from condenser curved surface, and heating it dry... a 7. Make the hole for the motor peg paper, to art tissue, to Christmas tissue prelude to a later exercise in forming before gluing this “ upright” in place. wrapping paper, and even Japanese tis­ prop blades. AH these pieces can be 8. Build the rest o f the fuselage side. sue, the plane flies. It flies very well in­ made straight. Wing ribs are shown flat LET IT DRY ON THE BOARD OVER deed. While outdoor flying has too many bottomed or undercambered. The flat NIGHT. The reason for this is to prevent variables for accurate recording pur- bottomed version is recommended. warps. 58 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ?\ 'MAGNIFICENT STINSON RELIANT If you're a Sport Flyer, 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— it’s rugged (look at those frame photos), loads of room— and flies great— and can be built for Control line also. The Kit's a real joy— Top grade sanded— density Selected Balsa. Die Cut & num­ bered parts make assembly swift & sure with Step by Step plans. Formed gear— Alum en­ gine mounts— Scale decals— all linkage hardware: pushrods, aileron & elevator horns, bell- cranks— clevis, connectors, etc. Beautifully detailed rugged Plastic Cowl, Wheel pants— Strut fairings— and much more — See Your Dealer.

SPAN: 57-9/16" LENGTH: 38" ENGINE: .40 to .56 SCALE: 1-3/8" =1 FT. OPERATING SAILING MOREL STAR ★ f/SH

This little beauty will CHECK THESE FEATURES warm the heart of any • PLASTIC M0L0E0 HULL • DIE CUT MAHOGANY CABIN sailor, large or small. • 0ΙΕ CUT FRAME • DIE CUT PRINTEO PLANKED It’s an excellent sailing PLYWOOD OECK model. Hull design and • SAIL CLOTH • METAL FITTINGS long keel & ballast pro­ • RIGGING CORDAGE • METAL RU00ER vide excellent stability • MAST & BOOM MATERIAL in the water— And • METAL KEEL WITH LEAO BALLAST • STEP BY STEP PLANS AND it’s equally pretty INSTRUCTIONS • SAILING TECHNIQUE ON PLAN on the mantlepiece. • BASE SHOWN NOT INCLU0E0

HEIGHT 20V,e" LENGTH 14V6" BEAM 3Ve K I T B - 2 5

STERLING MODELS · 3620 G ST. PHILA.. PA. 19134. If no dealer available, direct orders accepted — with 10<* additional charge for handling and shipping (60c minimum m U S . $1 25 minimum outsxJe US ) □ Catalog of entire kne of airplane control ine model kits fVC scale and Trainer kits, boat model kits, accessories, etc 50« enclosed □ Secrets of Model Airplane Bud dog Including design, construc­ tion. covering. finishing, flying, adjusting, control systems, etc 25c enclosed □ Secrets of Control Line and Carrier Rymg ' Indudma prefbght. soloing, stunting. Carrier rules and regulations. C arner flying hints and control line installation instructions 25« enclosed No checks Only U S money orders or currency acceded

Name______Address ______City State Zip NOVEMBER 1975 59 STRAIGHT LINE shows you the direc­ tion in which the “ grain” runs. Cut the 10’ SPAN tissue so the grain runs from the front of the plane to the back. 1/4 SIZE CESSNA 310 TWIN 21. Cut each piece of tissue larger than the side o f the plane being covered. 22. M ix.half white glue and half water KIT $109.95 postpaid — Dealers Write in a small container. With the brush, paint this mixture ONLY on the edges o f the side being covered. In other words, paint only the longerons, not the up­ rights or the cross pieces. DO paint the uprights that hold the motor peg. 23. Lay the tissue on so that it has no wrinkles. Do not try to pull the tissue too tight. 24. When the glue is dry, cut away the excess tissue with a new, sharp double edge razor blade. (Break blade in half lengthwise with pliers so there will be two pieces, each having one cut­ Distributed in Canada ting edge.) By Logictrol Canada 25. When all four sides are covered, 200 Bannerman Ave.. Winnipeg. Man the tissue can be shrunk. Do this by spraying water on the plane. DO NOT • Fast Assembly • Moulded Cowls • 3 piece wing SOAK! Hold plane far away from the • For .60 Engines • Flies Like A Trainer • Machine Cut Parts sprayer, and give one spray to each side. • Rolled Plans • 12014" Span • Designed and Produced • Hardware • 18 lb. Flying Weight By Bud Nosen Let dry. Do not spray again unless tissue is still very baggy. Too much water may An almost exact copy of C essna's popular Twin Engine aircraft. Designed by Bud Nosen, flight tested cause warps. and modified to provide the smoothest flying kit of its kind on the market. Large lateral area makes the 26. Paint one coat only o f the follow ­ loss of one engine hardly noticeable. Engines over .60 not recommended or needed. ing mixture on the fuselage: 1 ounce NITRATE dope. Write for 1 ounce Nitrate dope thinner. our illustrated BUD N0SEN MODELS 20 drops Castor oil. catalog - 25 c 522 15th Ave., Box 105 C, Two Harbors, Minn. 55616 27. Cut cellophane for windows and windshield. Glue in place, using Tester’s 9. Next day, remove the pins, butthey meet at the rear of the plane. LET model plane glue. DO NOT MOVE the fuselage side. Leave DRY OVER NIGHT. STAB AND RUDDER it where it is on the plan. 15. Next day, gently remove the fuse­ 1. Follow the same building tech­ 10. Place a piece o f plastic food wrap lage from the plan. Cut and sand the nique you used on the fuselage. over the fuselage side you have already remaining cross pieces and glue in place. 2. BE SURE you leave these parts finished. Make sure the plastic has no Keep lining the fuselage up with the pinned to the board over night. wrinkles. plan so it will be straight. Pin the fuse­ 3. Sand (Gently!) each part down 11. Build the second side ON TOP OF lage to the plan )UST at the point where slightly to remove excess glue and some of the first side, and let it dry over night. the bottom cross piece is located. weight. Round leading edges. 12. Next day, remove the pins, and 16. Cut “ Former A," cut out center 4. Cover, but DO NOT SHRINK tis­ gently remove both sides from the board. section, and glue to nose o f plane. sue. The tissue grain should run the Reglue any pieces which may have come 17. Bend landing gear wire as shown. length of the stab and from top to bot­ loose. Wrap to 1/16 x 1/8 cross piece with tom o f the rudder. 13. Stand each side up on the plan thread, and rub some glue into the 5. Paint one coat o f dope mixture and pin it to the top view o f the plane, threads. When glue is dry, rub in some on one side o f stab and rudder, and pin starting at the rear. Pin only where the more glue. Now glue this piece into the these parts to board until dry. When bottom o f the fuselage is flat. Now cut, fuselage. dry, paint other side and pin parts back sand, and fit one bottom “ crosspiece.” 18. Cut the wheels from a foam meat to board. When it is the proper size, cut a second tray. Make center holes and glue in alu­ WING piece the same size. Glue one piece at minum tubes as shown. When dry, place Wing ribs can be flat bottomed or the bottom and the other piece above on landing gear and bend ends o f wire can have a curved bottom (called under­ it at the top. DO NOT glue in the “ cross up to hold wheels in place. camber). Novice builders should use the piece" to which the landing gear is at­ 19. GENTLY sand fuselage to remove flat bottom ribs. tached. excess glue. Sand the edges of the lon­ 1. Cut ribs. To do this, place a piece NOTE: gerons JUST A LITTLE BIT to make of cardboard, thin plywood, or any other Sometimes the cross pieces which them rounded. fairly hard material underneath the out­ connect the tops o f the fuselage sides 20. Cover the fuselage with tissue. The line drawing o f the rib. Make a series of are difficult to glue in place. One trick “ grain” o f the tissue must run along the pin holes through the outline and into to solve this is to glue and hold the length of the plane. To find out which the cardboard. Work around the rib. piece in place for a few minutes, and way the grain runs, hold a sheet o f tis­ 2. Connect the pin holes in the card­ then put blocks, books, glasses o f water, sue in front o f you. Make a one inch board, and cut out the rib. CUT the or whatever, on BOTH sides of the fuse­ tear from the top o f the sheet. Now rib larger and then sand down to the lage to hold the piece in place. make a one inch tear from the side of outline. Make sure when you do this that the sheet. Look at each tear carefully. 3. Make a second cardboard rib by you do not bend the fuselage to the side. One tear will be a crooked line, and the pushing the pin through the holes you 14. Glue the two sides together where other will be a straight line. The made in making the first rib. Cut out

60 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER FLYING MODELS for those who insist on the V E R Y B E S T

RADIO CONTROL STANDOFF SCALE Standoff Scale is the newest and most exciting thing on the R/C scene! By subtle design, these models achieve truly excellent flying qualities, equal to sport or pattern R/C types, at no expense to the scale a p p e a r a n c e . ______

P-39 AIRACOBRA $57.50 Span: 6 0 ' Eng: .40 to .60 · Kit RC-18

P-51B MUSTANG $54.95 f EXACT SCALE R/C Span: 60" Eng: .40 to .60 Kit RC-16 S.E.5A $57.50 P-51D CONVERSION KIT $8.50 Span: 5 3 ' Eng: .45 to .60 Kit RC-13

RADIO CONTROL TRAINERS CONTROL LINE CONTEST AND SPORT MODELS 4 i

TAURI $33.50 Span: 57" Eng: .15 to .45 Kit RC-4 BABY FLITE STREAK $4.95 Span: 2 4 )4 ' Eng: .049 to .099 Kit N-4 SCHOOLMASTER $13.50 Span: 3 9 ' Eng: .049 to .09 Kit RC-8 HEADMASTER $23.95 Span: 48" Eng: .09 to .35 Kit RC-11

FLITE STREAK $11.95 Span: 42" Eng: .15 to .40 Kit N-2

COMBAT STREAK $10.95 Span: 4 2 ' Eng: .19 to .40 Kit N-5

SCHOOLGIRL $12.50 SCHOOLBOY $8.50 JUNIOR FLITE STREAK $8.95 STREAK TRAINER $12.95 Span: 29" Eng: .020 to .049 Kit RC-9 Span: 29" Eng: .010 to .020 Kit RC-3 Span: 31" Eng: .09 to .25 Kit N-3 Span: 33" Eng: .15 to .19 Kit N-10

SEND 250 FOR 8 PAGE CATALOG PLUS MONOKOTE SAMPLE TOP FLITE MODELS, mc. ChS' ä

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 61 A new concept in glow plug design PRIMING: Simply prime engine through the all weather starting fatigue and allows glow plug, flip over twice, connect battery leads and start. No fuss, no muss. priming right through the plug IDLE: The Head Start Plug will allow you to itself. Simply prime, turn over twice, throttle down to the point that you can virtually count the revolutions. Improved connect spark and start...goes off 99 idling is another fringe benefit of this new times out of 100 on the first flip. concept. No need fo r expensive starters or PERFORMANCE: Improvement of your engine’s performance plus easy cold weather extra paraphernalia to carry starts are two additional benefits that the Head S tart G low Plug has to o ffe r. Per­ on the field. A sure-fire trouble formance is significantly improved in m ulti­ cylinder engines. free approach to enjoy CONTEST PROVEN: Bantam Model your day flying instead of Products has supplied some of America’s top competition pilots with plugs to field test playing nursemaid to a their performances. The results were cranky starting engine. phenomenal, proving time and time again their reliability and performance. Available at all hobby LONG LIFE WIDE CONVOLUTION-FILAMENT shops where better R/C products are sold. ST PLACE ENDICOTT, IM.Y. Standard Model - $1.75 ea. PATENT PENDING R/C Model - $2.00 ea. In Both Long or Short Reach DEALER & DISTRIBUTOR INQUIRIES INVITED MODEL PRODUCTS CORP P.O.Box 314 BANTAM Pompton Plains, N. J. 07444 and sand to shape. between the tip piece and the paper or thinner, and castor oil on one wing. Pin 4. Place one rib on top of the other wood used to hold it in place so the to board until dry. Then do other wing rib so they are exactly lined up. Push a glue won't stick everything together. and then the center section in the same pin through both ribs near the front, at LET DRV OVERNIGHT. way. the middle, and half way to the back of 12. Next day, fit in place the two PROPELLER the ribs. Remove all three pins. pieces that go from the leading and trail­ Carving of a propeller from a block 5. Cut 12 pieces (10 plus 2 extras) ing edges to the tip. When they fit well, of balsa requires more skill than is needed of 1 /32 balsa wood which are slightly glue in place. to build the TWIRP, so we have chosen larger than the cardboard ribs. Make a 13. When glue is dry, remove pins. to go with the ready-made plastic type. "sandwich” with the pieces of balsa Crack (just barely!) the leading and trail­ This permits the beginning modeler to wood between the two cardboard ribs. ing edges where shown. Put glue in the get in the air successfully without having Push pins through the pin holes you cracks, and pin the center section o f the to jump this hurdle. We highly recom­ made in the cardboard ribs in order to wing to the board. mend the Peck-Polymers plastic prop. hold the "sandwich” together. 14. Prop up the wing tips so they are It is lighter and has a more efficient 6. With a sanding block, gently sand exactly one inch o ff the board. Let glue blade shape than the popular “ Sleek the balsa wood until it is the same size dry. Streek” prop. as the hard cardboard ribs. 15. Cover bottom of wing and then If you wish to try carving your own, 7. Before taking out the pins, cut or top o f wing. Grain of paper must run a prop blank is shown on the drawing. sand in the "notch” on top of the ribs. from one wing tip to the other. If using The how-to o f prop carving, if done Fit a piece of 1/16 x 1/16 stringer into flat bottom ribs, do not put white glue properly, would take an article by itself, the notch to make sure the notch is the mixture on the tops or bottoms of ribs, we don’t have room for it here. Seek right size. except for the two ribs that make up the help of a modeler experienced in 8. Pin the leading edge and trailing the center section. Cover bottom of prop carving. It ’s not so difficult once edge o f the wing to the plan. wing with one piece o f tissue. Cover you get on to it. 9. Glue the ribs in place, making top of wing with 3 pieces (one for cen­ NOSE PLUG certain that they are not tilted to one ter section, and one for each outer sec­ 1. Cut nose plug pieces larger than side or the other. Let glue dry over night. tion of wing). shown. The "grain” o f each piece should 10. Cut the “ spar” which will fit into 16. Shrink one wing at a time. Make run in the opposite direction from the the rib notches to the proper length, sure no water gets on center section or piece in front o f it and behind it. and glue to each rib. other wing. Use one spray on bottom of 2. Cut the pieces for the part that 11. Cut the wing tip piece and glue one wing and then the top. Pin that fits into the square hole in "Former A .” it to the spar. NOTE: To make absolute­ wing to plan and let dry. Then do other Cut these pieces slightly larger than the ly sure that the wing tip pieces are glued wing the same way. Pin to board and let square hole. Glue them together with in straight, place pieces o f paper or scrap dry. Then do center section the same the grain o f each piece crosswise to the wood under the tip pieces so they rest way. Pin to board. one next to it. Let the glue dry tho­ flat. Put a small piece of plastic wrap 17. Paint one coat of nitrate dope, roughly. When dry, sand each side edge a

62 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER little at a time until the part just fits snuggly in the square hole. 3. Place this part PART WAY into the square hole. Put a heavy coat of glue on the forward surface of the part MOTORI and glue the nose block to it. BE CARE­ ITALY FUL NOT TO PUSH THE PART ALL ATTENTION! THE WAY INTOTHE SQUARE HOLE!! 4. When the glue is dry, remove from ALL OF THE NEW SCHNUERLE PORTED ENGINE square hole and make certain no wet MANUFACTURERS. glue is on edges. 5. Now put part all the way into the OPS welcomes you to the exciting world of improved square hole, and sand nose block square engine performance. with fuselage. 6. Make hole through nose block for OPS has been in production of Schnuerle design the aluminum tubing. Hole should be engines since their inception in 1965. pointing slightly down and just a hair to the right as viewed from back of plane. Since then we have built an envious reputation for 7. Widen hole on the back side (the producing superb performing engines. part that goes into the fuselage). All OPS engines presently being produced also have 8. Fit aluminum tubing into the nose block. Glue at back where you widened the ABC type of piston and sleeves. hole, by putting glue into widened area. When you see an OPS at your local hobby shop, pick 9. Bend music wire prop hook. From it up and check it’s features. Notice how free it is of the back of the nose block, run the music wire through the aluminum tub­ ring friction. We have no rings. ing, through the washers, and through We wonder how long it will be before all engines the propeller. Make bend in wire to shift to ABC design also. hold everything together. FINAL ASSEMBLY Send for multi colored brochure on all OPS engines along with helpful 1. Glue rudder in place. Make sure hints on engine operation and adjustments...... $1.25 Post Paid. it is straight up and down and is glued on the fuselage straight from front to S & cutťiócá (fa ftfie ttfio K back. 2. Put tlte stab in the slot provided. P. 0. BOX 26247-A, NEW ORLEANS, LA. 70186, 1-(504) 242-5967 Wedge the stab leading edge in place by putting small pieces of balsa over and under the leading edge where it passes through the fuselage. Later on, glue the FOR THAT PROFESSIONAL LOOK.. . stab in place once you have found the proper location by test flying and ad­ justing. \ r 3. Place (DO NOT GLUE) the motor BALLAST-LOK' peg in the fuselage. 4. Place (DO NOT GLUE) the nose 'HOOKER $1.95 block and prop in the fuselage. 5. The wing is held in place with a $2.49 light elastic band, or make a loop of elastic thread. BOTH FULLY ADJUSTABLE FLYING AVAILABLE AT FINE HOBBY SHOPS EVERYWHERE 1. Cut a short loop of 3/32 or 1/8 rubber. Wash it, tie the knot, run it in to Add 35 cents postage and handling. California residents add 6% sales tax. the fuselage through the square hole so the knot is at the back, and slide the motor peg through the loop. Wind in a ^^COTT^RESEARCH^CO^PO^o^j2^ost^Mesa^a^262^^ few turns and test fly. 2. If plane stalls, slide wing back on edge o f the stab. If this does not do it, and flying well, replace motor with 14 fuselage. If it continues to stall, raise sand away some o f the nose block or to 18 inch loop. Clean, knot, and lubri­ the leading edge o f the stab slightly by add a tiny bit of "up thrust” by placing cate. Then stretch-wind using a mechan­ changing the balsa pieces that hold it in a piece o f card stock between the nose ical winder. place. block and the bottom of the fuselage. Take as much care in adjusting as If plane continues to stall, add small 4. If plane spirals in to the left, add you did in building, and your plane will pieces of card stock between nose block more “ right thrust” (card stock between fly well. Build lightly and adjust care­ and body of plane, on one side, so that nose block and left side o f fuselage). fully. HAVE PATIENCE AND GO plane flies in tighter circle. Further corrections can be made by SLOWLY. · Further corrections for stall can be steaming the left wing over a kettle of made by adding “ down thrust.” Place boiling water and gently bending the pieces of card stock between nose plug left wing’s trailing edge down slightly. C/L ...... Continued from page 35 and top o f fuselage so that propeller Remove from steam and hold in your Then the CD said, ‘Son, It ’s a points down more. hands until set. real disgrace to fly a Combat If all else fails, add clay to the nose. 5. If plane spirals in to the right, plane in a Slow Rat Race.” 3. If plane dives, move wing forward. try adjustments opposite to those above. Thanks for the song, Jeff. Hope you If it continues to dive, lower the leading 6. When plane is climbing in circles sell a million and don’t forget your

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 63 sides? Bob Bruch, of the Polish Pit Crew and now a member o f the CLCB, has the answer. Bob suggests that we make a new rule giving appearance CANNON IS points for safety thongs, just as the SMALLER! rules now give appearance points for LIGHTER the plane. Everybody knows how much SMALLER work the Stunt guys put in on their IN SIZE! ilN WEIGHT! planes getting that perfect finish for the r Th 1 all-important appearance points. Can you k 1 11 C 1 imagine what would happen if there were appearance points for safety thongs? TirJl They would be making them out of macramé, putting jewels on them, hav­ SER IES ing them bronzed, etc., with each of i them trying to have the best safety thong money can buy. Scene at some future contest: “ Hey, 1 w Don Shultz, haven’t seen you out flying for quite awhile. Whatcha been up to and what are you flying today?” “ Well, hi there, Dirty Dan you o l’ \ ^ L m ' sack. Hey, I’m flying the same o l’ plane ^ but wait until you see my new safety thong! Boy, am I going to put it on ’em Introducing a today. I been working on this beauty for a month now and it is really sano. SMALLER, LIGHTER RECEIVER Had to import the silk, couldn’t find ...The NEW TINI-MITE anything locally that was good enough. Had to have the engraving done over Eight Channel Capability Volume 1 61 cu. in W eight 1 oz Dram 8 ma A three times before the guy finally got it NEW STICKS Open Gimbal for precise centering control perfect. Took a lot of work and a ton of THREE SYSTEMS FROM WHICH TO CHOOSE 'DROP' 1. TINI-BLOCK includes Receiver, and one Servo in money but I finally got a nationally- the block IN SIZE ranked safety thong. Hey, want to see 2. TINI-TWIN includes Rx and two Integral Servos 3. TINI-MITE includes New TINI-MITE Receiver, THE NEW it? It’s right here in the car. Even made individual Servos a special ‘safety thong’ carrying case for All three systems available in 2. 3 or 4 channels Price the same for all three w ith same MINI-2 it. just hang on a minute while I get channel count Transmitter 2x4 15/32* the combination for the lock.” In addition they include transmitter, antenna, receiver, servofs) or (block), mead Rx battery 6 - 5 /3 2 in "Uh, Don I think I heard them call and charger Transmitter uses 9 volt dry Receiver 23/32x1 13/32* my name at the Combat circle. Gotta battery monitored by LED voltage indicator 1 -1 9 /3 2 run, Bye!’’ DELUXE SYSTEM, same as above includes Volume 1 61 cu in meads, charging lamp, meter in the Tx. W eight 1 0 2 Super idea, Bob. Maybe progressive charger for both packs Current dram 16 ma thinking like this will cut down on the Rx & Tx in both Standard & Deluxe systems Operating voltage 4 8 to 6 volts I expandable to a full 4 channels from a 2 number o f controversies the CLCB al­ Servo 23/32x1-3/8x1 1/2 in or 3 channel system at minimal cost Weight 1.2 0 / ways seem to get involved in. 2 Channels 2 Servos $149.95 3 Channels 3 Servos — $1 89.95 Frequencies All std 27 & As long as we are talking about Preci­ 4 Channels 4 Servos $239.95 72 MH2 sion Aerobatics, I’ve got a letter here Factory assembled only 27 MHz prices shown ECONOMY PRICED DELUXE from Wynn Paul that might be of in­ Add $10.00 for 72 MHz STD. Incorporates mead batteries throughout, Write for complete brochure on entire line of terest to you. I wrote to Wynn asking $119.95 plus charger AddSlOO O CANNON R/C SYSTEMS 12) ΜΗ;) tor 72 MHz for help on a project I have in mind. As you’ll see, Wynn’s reply was any­ μ i i ■ ■ ’ 13400-26 SATICOY STREET’ $159.95. NO. HOLLYWOOD. CA. 91605 ' thing but overtly helpful, but it is in­ Æ m m W(213) i 764-1468 teresting. Incidentally, Wynn is the edi­ In Canada...H.&.W. ENTERPRISES · BOX 972 · REGINA, SASK. tor of the super newsletter put out by Precision Aerobatics Model Pilots Asso­ friends when you get to be a star! lot of people’s time is the rule in Preci­ ciation (PAMPA). * * * sion Aerobatics (the Stunt guys prefer “ Dear Dan: Correction: Gary Frost is still Presi­ P A over just plain Stunt) requiring a Since you have been getting the Stunt dent of MACA, and will continue to op­ safety thong. I still can’t understand News as a service to our beloved CLCB, erate in that capacity until the end of how the rule was voted into existence you sometimes take time out from cut­ 1975, contrary to my comment in the in the first place, as Precision Aerobatics ting streamers or wrapping wire around September issue. would seem, to me, to be the last pen bladders to look at the pictures or * * * event to consider when making safety drawings. Maybeyour local Stunt Freaks As a member of the CLCB, I get in, thongs mandatory. At any rate, the rules could help you with the big words like first hand, on all of the little contro­ now require a safety thong, and a lot of airplane, precision, or landing gear. Our versies that go around the country con­ Stunt Freaks (Precision Aerobatics ads are nice because sometimes they have cerning rules, interpretations of rules, Freaks?) don’t like the rule and want it diagrams or pictures. You can use the etc. Most of it is pretty hard to take removed. There is just such a proposal newsletter for wing covering if you dope very seriously. One guy will get all up­ now before the CLCB and it will be it, or some of our Stunt guys say they set about something, write a bunch of voted on soon. take it into the bathroom when the letters, drag others into the controversy, But there is also a group o f people Sears catalog runs o u t. .. anything that and here we go again. who want the safety thong rule left in can be helpful to our hobby, er, cause, One of the items that has taken up a the rule book. How do you satisfy both er, mania, er, obsession . . .

64 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER “ Anything you want to pull out of the newsletter and use in your column feel free to do so. This can be justified because it goes out to only about 350 people, while the magazine has a much larger reading audience. PROFI “ Am planning an article about Mono- kote from one o f the Stunt guys in ENGINES Alaska who uses it on his car, his tent and sometimes for a raincoat. Anyway, one of the TV series, Animal Kingdom, // sponsored by Omaha Life, had one of Goes Like 60 his Monokoted jobs on a couple of weeks ago . . . it was a white covering on a polar bear that had been burned 40F RC and you couldn’t even tell the difference. Only us Stunters knew because you could see the tiny raised portions where the trim was put on to show his eyes, mouth, and nose. There was a really great Nobler covered with Monokote at the NATS and the guy is going to do something for Stunt News, provided I can send him some Sterno cans for his iron . . . he ran out doing the polar bear. “ For a project plane, would you con­ sider doing one o f the Sig kits . . . P-51, Akrobat, or Super Chipmunk? They are obviously available and can be compe- tetive. Otherwise, why not try Don Shultz for his Avenger Stunter. It’s a good ship, so it seems, and his illustra­ tions can make even the worst article good . . . or airplane for that matter. Have you ever heard about the time he • Schneurle Porting did some illustrations for the Titanic? • Double Ball Bearings He was just starting on the Hindenburg • Silencer System with inserts for . . . try him he will be a really big help. adjusting noise level to fit local STANDARD “ Incidentally, that California whiz requirements. kid o f Stunt and cheerfulness, Bart • Heavy Duty Construction Klapinski, told me at the Nationals (he -N o Castings did a great job as assistant CD) that he • Precision machined - was doing a full article for MODEL QUIET INSERT no gaskets needed BUILDERonthe Nats (andhe did. wen) • Automatic mixture control . .. and he was taking more pictures than 9 EXTRA QUIET INSERT carburetor Playboy magazine at one o f those Cali­ fornia nude beaches. SILENCER SYSTEM SUPPLIED Send lo r additional inform ation. So long, keep in contact. AS STANDARD EQUIPMENT Wynn Paul.” X AVAILABLE AT YOUR FAVORITE DEALER What a strange letter. And for years I have been under the assumption that all Stunt folk were, well, just plain folk. j im soii m an p r o d u c t s * * * +4 6929 WEST 59TH STREET · CHICAGO. ILLINOIS 60638 · (312) 586- 7101 For the past year I have been making a semi-serious effort at Stunt flying. Not having time to build a Stunt plane, I the ground one day when something in fixer-upper). have been using planes that others have the control system let go. I had to have Finally got everything fixed, dropped built. My buddy, Ron Scoones, gave me another Stunter and happened to run in an old Fox Stunt 35 and went flying. a Midwest P-63 King Cobra that only across a Sig Chipmunk hanging in a hob­ Hey, this is neat. Plane really feels good. needed covering. Somebody else gave by shop. It looked good and was for Did some outside loops. Wow, super the plane to Ron and nobody knows sale for ten bucks. There was over ten line tension. Did some inside loops. who originally built it. Whoever it was dollars worth of Monokote on it, so I Line tension went away completely. sure builds heavy (lots o f 5-minute laid my money on the counter. Damn thing is warped and now I know epoxy), so I never have been too happy Found out why the plane was sold so why the line tension was so good in with that plane. Then Lee Pipkin gave cheap when I got it home. Some turkey outsides. Tried to get the warp out and me a Nobler that was complete except (I know who it is and I’ll get even with got most o f it, but the plane is still very for a cowl and the installation of a tank him some day) had built the plane, light on the lines on inside maneuvers. and motor. It was even covered. I put an crashed it, and then fixed it just enough And evidently a 3-1/2 oz. tank was in­ old Fox 36X needle bearing motor in to make things look good from the out­ stalled, as I can’t get a full pattern in the plane and flew it. Engine runs side. Took me over 4 evenings to get before I ’m out o f fuel. weren’t too good, so I put an extra head the plane ready to fly and I can do a lot After having 3 Stunt planes, all o f gasket in the Fox and now it is OK . . . o f fixing in one evening (my Combat which have seen quite a bit of flying, I Not good, just OK. The Nobler went in background makes me an experienced am ready to build one o f my own, but NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 65 I still don’t have the time to put toge­ bushed the leadouts with 1/16 brass tub­ not be my policy to recommend any ther your average, built-up Stunter. As ing to keep them from wearing through products without having a chance to I write this, we have several Combat on the metal crank. personally use, and try to destroy said meets coming up and I have been using I should have the plane done and products. more Combat planes than usual this year, flying before the next column and I’ll I have, however, used the BR-22 seal so I have a number o f them to get let you know how things turned out (I bought it from Bill) and it is just together pretty soon. then. the thing for Fireball plugs. Most every­ Enter the new Sig P-51 Stunter. It is * * * body is aware o f the fact that Fireballs obviously the fastest building Stunter Just got a line on some Combat stuff like to blow seals quite frequently. Too around, what with its foam wing and that Bill “ Moose” Allen is putting out. bad, as the element used in Fireball assorted plastic parts. So I bought one Here it is straight from B ill’s ad in the plugs is about the best around. Use B ill’s and got started on it. Did the wings August MACA newsletter. ceramic seal on your Fireballs and they first. Nothing to it. Lay up a wingskin BR-22 Ceramic Plug Sealant .... won’t let you down in the middle o f a from the balsa sheet in the kit, brush $3.50. A must for high nitro, high com­ match. on some contact cement (I used South­ pression Combat engines. Enough for I do have a set of B ill’s plans for the ern R/C’s Sorghum and it works great) 2540 plugs. Sniper Mk 7 but haven’t had a chance and lay on the sheeting. Trim the sheet­ Pen Bladders — No. 24 s iz e ... 13 to build one yet. ing, glue on the LE and the TE, slip in cents each. Should be used in doubles * * * the bellcrank, glue on the tips and you for the most consistent engine runs. Just got a note from Rich “ von” have the wing done. The fuse is almost Stainless Steel Fuel Syringes. . . Lopez that contained some good news. as easy. The fuse sides are printed, show­ $10.00. The only thing that will wear Rich has found a sponsor for the 1975 ing you where all the little parts go. out are the seals. Seals available upon MACA Top Twenty t-shirts. Midwest Glue these on, join the fuse sides, glue request. Products Co., o f Hobart, Indiana has in all the formers and you’re half way T-pins, 1/2 lb. box . . . $7.00, $25.00 agreed to foot the bill for the t-shirts. there with only one or two night’s worth at hobby shop prices. Super. Thanks a bunch to all o f the work. Next step is to put the wing in Sniper Mk 7 plans . . . $3.00. A whole people at Midwest. the fuse, which is where I am right now new concept. . . an adjustable design Hmmmm, wonder if the preceding so we won't go any further into the con­ that "tunes” in on the reflex action of has anything to do with the following? struction right now. individual fliers. Parts may be trans­ While thumbing through a recent is­ Good impressions: Wood is pretty ferred to other planes as a result o f the sue of Model Retailer, a trade publica­ fair for a kit, considering that wood is unique construction techniques em­ tion, I noticed a blurb about a new kit so hard to get right now. Plane is quick ployed. from Midwest (that’s right, of Hobart, ’n easy to build. Lots o f good hardware Combat Pak Plans... $2.00. This Indiana) that is soon to be released. The included. Price is right at $20.95. Foam handles 95% o f the needs o f the pit kit is the “ L i’l Snip,” designed by none wing is cut accurately and smoothly. crew during any kind o f match, and other than, ta-dah, Rich “ von” Lopez. Plans are easy to read and very clear you don’t have to lug everything you The L i’l Snip is designed around the (with one exception, more on that later). own around to do the job. If you need Cox TD .049 and looks like it is easy to Plastic parts fit and look good. what isn’t employed on the Combat build and pretty tough, too. This is the Not so good impressions: The plans Pak you’re in trou ble . . . and that’s first .049 Combat k it that is made for and the instruction booklet tell you where the other 5% is. the TD and hopefully the availability o f how neat it is to have a removable tank Grand Prix Super Tigre Reworks. . . good .049 Combat kit will spark some and that the P-51 is designed with this tell him what you want and he’ll quote. interest in this the cheapest form of feature. Great, but the plans don’t show Inquiries concerning any o f the above Combat flying. you how to do it! Obviously, the tank items should be directed to: Wm. J. Though not mentioned in the ad, the has to be modified to be removable, Allen, 418 Fairmont Dr., DeKalb, Illi­ L i’l Snip was published in the Feb. ’74 but I have yet to figure out how to do nois, 601 15. issue o f MB. Check your back issues it. I put extended vents in my tank and Do notice that I have simply listed for a sneak preview o f the new Midwest glued it in. The nylon bellcrank supplied the items that Bill sells and am not kit. (Plans are still available, wen) didn’t feel very free so I put in a Clary telling you that everything is very trick, * * * (used to be Veco) metal bellcrank and just what you need, or whatever? It will I had an idea the other day that may

66 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER or may not work out. Nothing ventured is worth two birds in the bush, or what­ ever, so I am going to try my idea and see what happens. Here is what I am DU-BRO 20" FLEX-CABLE MOTOR CONTROL planning. Every once in awhile I will s - m - 9 pick out an event and build what we’ll Provides the ultimate in 1 - Flexible Steer Aircraft Cable 1 * Brass Threaded Coupler call a “ Project Plane” for that event. -Γ control cable assembly. 1 - Threaded Kwik-Link I'll get all the good stuff together, try Highly flexible, free run 1 - Solder-Type Kwik-Link ID E A L FOR ning and adjustable at 1 - Nylon Sleeve it all out and we’ll see what works and R/C PLANES control horn. FC-149 . No. 165 . $1.49 what doesn’t. When I get done with the BOATS.. . CARS plane, practice some with it, and enter a THE ORIGINAL ^THREADED COUPLERS, few contests, we should know a little DU-BRO KWIK-LINK. bit more about that particular event and Designed for use on the Du-Bro Kwik-Link. what it takes to win. Brass, 1'/«" overall Potentially, the Project Plane series Control yoke assembly for any control with % " 2-56 thread will be a good thing. With a monthly linkage. Allows easy removal, for on-the- 1 /16" opening for piano wire or column available to me I will be able field adjustments. 4" rod and split coupling sleeve KL-49 . No i 06 49c cable. 2 each. to give you a running account o f the 12“ KWIK-LINK Roe and Kwik-Link. No 108 49c No. l i t problems or successes I am having. New products that become available can be " DEVCON®! tested on the planes and the plane itself STRIP AILERON can be used as a constant with which to LINKAGE “DEV-TUBE”tm compare the products. Photos can be HOOK-UP “ 5-Minute’ used to show problem areas of construc­ Epoxy in Complete fully . Revolutionary’ tion or new building techniques. All o f adjustable S new 2 in 1 this (and more, actually) can’t, or at 22-pc - dispenser. least rarely is, found in the construction set. articles featured every month in all o f Just snip off end of doubl the magazines. By the time a guy is Can nozzle and ready to publish his own design, he has be used push out already found the good combination on any equal and doesn’t tell you how he came across high, mid parts of epoxy and the hot set-up or the problems he had. or low wing plane. hardener - autom a­ With the Project Plane series, we will be tically. Just mix and able to really work with a design or en­ apply. When finished, gine on a continuing basis. DU-BRO KWIK-LINM close nozzles for future use with First Project Plane will be a Good­ The tried and true special cap. “ 5 m in­ year for the AMA Scale Racing event. spring steel ute" epoxy is famous I am already in touch with a few o f the Kwik-Link. Ideal for for super fast repairs big names in Goodyear and am presently - even in thin films any control linkage. and at low temperatures. trying to get some hot tips on equip­ 2 each. ment out of them. R-208 . . . 1 oz. . . . $1.70 KL-75 . no 109 . 7 5 cJ \ ______Specialty manufacturers take note: ------\ If you have any items, like props, land­ ( SOCKET HEAD BOLT AND BLIND NUT SETS ing gear, wheels, tanks, etc. that are For those who prefer socket head bolts. designed for the Goodyear event, send Includes 4 each of Bolts, Flat Washers, Lock them in so I can use them on the Project Washers and Blind Nuts plus one Allen > Goodyear plane. If your stuff works, ex­ Wrench. 17 piece set. Two sizes. High y l r A strength steel. ' 4 Sets pect a good plug for it in this column. 98c Freebies and outright bribes should SH4 No 129 4-40 X 1" . . 98c Set / ψ w / ^ SH6 n o 130 6-32 X 1" . . 98c Set ($ r be sent to: Dan Rutherford, 920 240th ______X St. S.E. #1, Bothell, WA 98011 or can be sent to Dirty Dan c/o MODEL DU-BRO KWIK-GLO STEERABLE NOSE BUILDER. GLO-PLUG GEAR Adios. · CONNECTOR Quality, shock For engines .10 & Ms O n ly ...... Continued from page 8 absorbing up. One piece nose gear. lutely no griping during application of brass barrel snaps 5/32" heavy smelly, nauseating, eye-burning gook,” on to plug for duty wire. positive starting. Complete with Still another says, “ Good for one week­ 24 - 1 /2 " long w ith end contest with the boys. No questions Nylon Nose Gear attached battery Blocks and lugs. An excellent asked!" This is inexpensive, but don't Steering Arm. get carried away. Only print coupons accessory for today's kind of NG-1 No 152 S2.95 Each you intend to honor. No reneging! (B ent) m odeler. NG -2 No. 153 S2.95 Each (S tra ig h t) Most people want to give generous N W -75.| No 154 $ 75 Each gifts. I seem to give according to my No 147 KG-200 . $2.00 (Nose Gear Wire) guilt. Let me explain. This year I had all my school children over in the fall so they could see our home and think of DU-BRO PRODUCTS' me as a person. They came with me, by INCORPORATED fours, on Friday nights, with my promise 480 Bonner Road Wauconda, Illinois 60084 U.S.A. to see lots o f airplanes after supper. The

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 67 ■ ■—

V a Ounce Monitors Your Battery— All The Time. POWER CYT.® Power CYT has a LED that continuously tells you the Standard Model, condition of your battery. There sa Power CYT for airborn without plug-in harness. and transmitter packs from 2 4 to 12 volts. When the Deluxe Model, switch is on. the LED indicates that ample battery power is with plug-in harness ...... $13.50 to $21.50 available to the system. When the LED goes off during Transmitter Model (9.6V)...... $16.50 an operating load, it meansyou have 10-20 minutes of power left. Power CYT draws 10 ma. average. It Can be used on either 3 or 4 wire servo systems. installs in minutes. GUARANTEED ONE FULL YEAR. Patent pending. See your dealer Dealer and distributor inquiries invited P Y T .A INDUSTRIES w 1 1 ^ fi17617 SouthSmith EastFast Ave..Avp Oak Park. Ill 60304 first Friday was a breeze. These four at the Toledo show. When I saw them I were girls. They showed mild interest was struck with the idea of painting Choppers.... Continued from page 25 and stayed apart a safe distance. They them a turquoise color so my students heim, just out o f Frankfort, and a fine, said, "thank you,” and went back to could string them between pieces o f ma­ long visit with Dieter Schluter, and a playing with the dog. The next Friday caroni to make Indian necklaces. We tour of his manufacturing plant. I talked was reserved for all boys. When Bill sprayed all the macaroni silver. . . plus with Dieter about the change in the started the engine o f his Aeronca C-3, a few desks and shoes. . . and strung the tail-rotor drive belt on the Heli-Baby the kids set up a wild screaming and “ turquoise” between the pieces o f “ sil­ (Sold in this country by MRC, and re­ Indian-type dancing that I've only seen ver," having the biggest washer in the viewed by John in the August 75 issue, topped by the grease fire in the school middle and graduating smaller up the wen) and he explained the situation as kitchen. Bill seemed to realize this meant, sides. My kids are giving these to their follows: The original round plastic drive “ I love it ! ” The din progressed quickly mothers this Christmas. I must admit belt used in the initial helicopter proved to maniacal proportions. Bill proudly Bill was disappointed with the few blue to be an excellent choice for the job it walked the plane at his heels. Around washers I left him. I owe him another was to perform. Unfortunately, the first the yard they went like collie and master big gift for that. He’s been a good sport 200 production belts were not "up to at the dog show . . . all the little boys all year. A good sport, you know, is one specs" and had to be rejected. Dieter trailed and screamed wildly. The inevi­ who will always let you have your own immediately designed the new flat belt table happened! It was just a tiny rib or way. for inclusion in all subsequent kits and two broken in the end of the wing. B ill’s Now about the presents we want, provided owners of the first 200 kits enthusiasm for third graders cooled girls. I use this approach. Wait until he with new belts free o f charge. The flat slightly. Variations o f this happened on is at a semi-crucial point in building. belts are nylon reinforced so as to avoid the next two Friday nights. On the fol­ He’ll be receptive and not hostile. Then stretching, and a new set o f pulleys was lowing two Friday nights, Bill under­ mention the item you want. Describe it also provided to match the belt. standably begged o ff and stayed at work. in some detail. Bill always says, “ Why Incidentally, Dieter explained that I feel I owe him an extra big present for don’t you pick it up tomorrow? Then the new pulleys are equal in size, where­ the inconvenience. you’ll have just the one you want.” as the round-belt pulleys were not. This I had another experience this year He doesn’t know it, but I can have the accounts for the increased tail rotor that filled me with guilt. All of you gift under the tree in three minutes! speed and the required 10 mm trimming teachers and Cub Scout pack leaders The procedure works so well I'm able of the blades for better control. out there will love this idea. I would to buy what I want in O ctober. . . on One of the highlights o f the factory recommend you buy your own supplies sale. So just work out any little routine visit was the production control and the and not use the supplies o f the modeler, you think he’ll fall for. And remember, jigs and fixtures used for component especially while he is out o f town. Bill it doesn’t hurt a bit to be wearing the testing. Matching the main rotor blades bought some bags of assorted washers sweater with the airplane on the front! for weight was interesting, as well as the alignment jigs used to precision-drill the holes for mounting. Dieter also demon­ strated his own test unit which gives VL-101 ELECTRIC FLIGHT SYSTEM readouts on various types o f blades, Featuring speeds, torque, etc. and at the same HYTORK 48 time indicates the reliability of the pro­ MOTOR & PLANETARY GEAR UNIT duct. Rest assured, the Schluter plant Complete flying weight 2VS oz.------will power leaves no stone unturned to produce Models 25 to 50" wingspan weighing up to 10 oz. the best possible kit for his customers! • Send 25é for Catalog showing com­ As luck would have it, Dieter’s Heli- plete line of Electric Flight Equipment Baby test pilot was also on vacation and Accessories and wasn’t able to demonstrate, but I • VL-101 System $19.50; Hytork 48, was assured he consecutively loops the Prop and Instruction Book $9.00; Fast “ Baby” in the plant’s parking lot! He Chargers $14.50 to $29.50 also confirmed that control response • See your Model Dealer or order Direct ψ PRODUCTS (add 10% for Postage and Handling - could be speeded up tremendously by DIVISION OF VISTA LABS Calif. Residents also add 6% Sales drilling holes in the paddle blades (per * % 7023-D Canoga Ave. Tax) send Check or M.O., No. COD's instructions) to reduce the gyroscopic Λ ν /Λ Canoga Park, Ca. 91303 • Hobby Dealers send for Information forces which stabilize the model. A quick tour through the stock rooms

68 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER \\

HOT STUFF TM. GETS IT TOGETHER F L A S H ! 'HOT STUFF" IS NOW $5iZ2 PER UNIT ! (Two large bottles) FAST THANKS TO TREMENDOUS AT YOUR HOBBY DEALERS NOW WORLDWIDE MODELER ACCEPTANCE DEALERS AND DISTRIBUTORS S ATE LLITE CITY. P.O. BOX 1935 CALL (213) 899-2301 ARLETA, CALIF. 91331 and shipping departments revealed a future from Kavan . . . I saw many ideas though, and both spent lots o f time plentiful supply of all parts and pieces I’d like to write about, but promised showing their collection of kits, finished for his impressive array o f helicopter I’d hold o ff until flight testing proved models, etc. kits, including the Enstrom DS-22, Heli- the ideas are really worthwhile! Before Of particular interest was the Helix Baby, and the beautiful Gazelle with “ leaving” Nurnberg, I want to thank Autogyro kit which has recently been collective pitch. (One of these days I’m the entire Kavan crew for their hospi­ released. The prototype model didn’t going to build that kit and see if it’s tality ... it was really great! They even have the radio installed that day, but really as good as they say!) As we left drove me around town and located a were shown excellent movies of its fly ­ the factory, Dieter directed us to a fabu­ complete set o f “ helicopter size” metric ing characteristics and examined the kit lous German restaurant a few blocks taps and dies! (No, I won’t loan them and finished model to the last detail. away, and we had a meal that was un­ out, Ha!). Earlier in the year, I had seen pictures believable! Thanks, Dieter, for your un­ A short 3 hour drive through the o f the Helix showing cut-away views, and paralleled hospitality and a fine day. German farmlands, brought us to a town I had it all figured out except the large Next, on to Nurnberg (home of the with the unlikely name of Knittlingen, disk on the bottom of the fuselage . . . world’s largest annual toy fair) and the where we visited the Krick Modelbau. and that really threw me for a curve! Kavan factory . . . or should I say fac­ Krick is noted for its excellent R/C air­ During a lull in the conversation, I ca­ tories? Actually, the Kavan complex con­ plane and scale boat kits. They probably sually asked Kurt to show me the pur­ sists o f several different plants, each de­ have one o f the largest selections o f old pose o f the disc . . . He gave me a know­ signed to have a separate function in ships and cannon in the world. Karl- ing grin and said, “ It ’s really very sim­ the overall scheme. The main headquar­ Heinz Denzin was kind enough to take ple, John. The disk is attached to the ters includes general offices, a model time to show us their production line main rotor shaft (coming out the bottom repair and experimental shop, stock and parts stocks. Karl designs most of o f the fuselage) and all you do is wind rooms, complete production machine the R/C kits, and incidentally, is an ex­ a long string around the disk, then bring shop, and other specialty shops, such as fighter pilot, shot down and captured the string back through a wire loop in glow-plug manufacture, silk-screen paint­ during WW II. He really has a story to the tail strut, and stand on the end of ing dept., wire forming depts., etc. Basic tell. I wish I had the time to repeat the string. When you apply power, the stocking of kits and parts, as well as some of the highlights. autogyro moves forward and the string packaging and shipping, is handled in a Right next door to Krick, is Wik- causes the rotor blades to spin-up as it separate plant located not too far from Modelle, home of the Bolkow BO-I05 unwinds! It also keeps it moving in a the main office. R/C helicopter kit (reviewed in an earlier straight lineduringtake-off!” Wow! How Another factory is essentially used issue of MB). Wilfried Klinger was not simple can it be? Watching the movies for the production of small machined available on our visiting day; he was later proved it was a great idea. Before I parts, and is resplendent with many d if­ out flying cross-country for his pilot’s left the factory, I placed an order to ferent automatic lathes and specialized license. His daughter, Wellgard, and test have one shipped back to me for a future screw-cutting machines. It was quite a pilot Kurt Schuhmann were on hand report.. . I’m looking forward to build- thrill to see the machinist move from one machine to another, loading each with a new supply of steel or brass rods, MOVING TO SOUTHERN CALIFORNIA? making adjustments, and checking the automatic operation, before proceeding MAKE SURE YOU GET A HOME to the next one! WITH A MODEL WORKSHOP ! ! I almost forgot to mention that Franz Kavan made sure I was provided with a FOR ALL YOUR REAL ESTATE NEEDS, CONTACT: pretty fraulein interpreter, since I don’t ANITA NORTHROP do too well with the German language “SE HABLA ESPANOL!” . . . Marianne drove me out to the model aerodrome north of town, where we SPECIALIZING IN: i ^ i (714) 979-1050 watched flight demos of two Jet Rangers (714) 538-9625 which had been modified with experi­ RESIDENTIAL ! \ i f f l l l l l V ___ mental devices, and also observed the COMMERCIAl : / T f l Office at: new Kavan Alouette being put through INDUSTRIAL ; f i £ m \ 688 W. Baker St., its paces by their test pilots! l a n d : real estate Costa Mesa, Ca., 92626 Look for many new ideas in the near

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 ing the Helix, since it ’s a little bit d if­ ferent. Greatest Book of The last stop was Paris... what a FULL-SIZE RUBBER FLYING beautiful city! During a city tour by bus, I noticed a Graupner 212 chopper hang­ SCALE PLANS, plus ing in a store window, along with a huge building, trimming, and SCALE MODELS biplane. Naturally, after the tour, I drove flying instructions ever back to find the shop, which wasn’t too published! OF WWII difficult, but finding the entrance door was something else! After about 20 min­ utes, I gained entrance to "Baby-Train,” Twelve half-inch scale Ο + Θ · Ο + 0 · a very large model shop specializing in rubber powered flying trains (what else?), huge R/C airplanes, and helicopters. There were loads of models by some of the 12 FULL SIZE PLANS radios, kits, engines, woods, and almost

world's best modelers, • OAUMMAM t V WILDCAT every heli kitted from around the world. •GRUMMAN t V HtUCAT including Doug Mc- • VOOQKT MU COMAIM No English was spoken here, but a cus­ • MinuMMi a n o • HAWK CM HUM »CAM I tomer, Daniel Haccard, interpreted for Hard, Clarence Mather, • •LWTRMARIN« V tX tlM • MmtAKHMItT II MM me to salesman Gilbert Lamou. Most Bill Hannan, Bill War­ • FOCKf WUlF TA l ii • MIL MM AINACOMA French helicopter activity is in back •CU tTO IM K ner, Bob Peck and • F V O THLMMMOLT yards, however, monthly local compe­ • MW MUST AMO tition meets have good turnouts. others. • COVE MIMO AMO TRIMMING • MAKING IT KtV One discovery, worth mentioning, is a French modification to the Graupner Compiled and pro­ Bell 212 main rotor control system. In FEATURE ARTICLES ON duced by I.E. Coleman, BUILDING, FINISHING, AND its original form, the 212 is basically a FLIGHT ADJUSTMENTS. Hillermatic control, where the stabilizer edited and published paddles are controlled by the swash- by Model Builder Ma- AVAILABLE NOW - $795 plate in cyclic, which in turn feeds input gazine. directly into the main rotor blades. In SEE YOUR HOBBY DEALER. OR ORDER the modification, additional mixing lev­ DIRECT. ADD $1.25 FOR FIRST CLASS. ers are attached to the main blade con­ CALIFORNIA RESIDENTS ADD 6% SALES TAX. trol arms, which now provides a "Bell FLYING System” input from the cyclic (much Box 4336, like the latest Kavan control on the Jet Santa Ana, Ca. 92702 Ranger). According to the reports, the SCALE MODELS system really makes that machine per-

Figure 2 GRAUPNER 212 MODIFICATIONS

Build mixing lever Figure 1 assembly to suit

Brass tube soldered to blade control arms

Ball lines swaged to m ixing lever

Add 2 control arms to swash-plate as shown

70 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER form like it should. See drawings for basic data. OLD-TIMER R/C SCALED FOR .049- .15 POWER "Small enough for a schoolyard · large enough to compete.” To pitch

Authentic Scaling Full Sice Detailed Plans Machine Cut Parts 1940 Mercury 4 5 " S p a n Selected Balsa A Hardwood 300 sq. in. 28oz. w/3ch.

$ 2 4 .9 5 MICRO MODELS P.O.BOX 1273 - A Mail orders:Add 10% for poslagr A handling COVINA, CALIF. 91722 Calif residents add 6% sales tax

THE LARGEST the PLANS COLLECTION! plankton boats catalog d e scrib e s Ο. T. F/F L IS T ...... 75* the most practical RUBBER/TOW L IN E ------75* radio controlled boats Ο. T. FLYING SCALE - - - 75* in the world. send 1.00 for it today. JOHN POND wait whippo Old Time Plan Service plankton boats P.O.Box 3113 110-m sunset drive San Jose, Calif. 95156 cocoa beach.fla.32931 Phone (408) 292-3382

build it exactly according to the plans, practice. The results were that the mod­ FINAL APPROACH and be perfectly satisfied with the way els actually flew better than wind tunnel While we are on the subject of modi­ it performs, but that’s not my bag ... testing had predicted. The measured fications, 1 have a few words I’d like to I love to experiment and modify and mean sinking speed was .85 feet per say. It has always been my “ bag” for the that’s what this writer’s article is all second, which amounts to a glide time of 25 years of R/C modeling to continually about. ’N uff said. · 192 seconds from a tow launched start look for ways to improve the perfor­ and 164 feet o f tow line (in still air mance of my models in respect to the conditions). These tests were conducted way I want them to look and to respond F /F ...... Continued from page 49 be given its full share of attention (see using gliders with aspect ratios of 19, to MY touch. I also believe that just equipped with turbulator wire (outrigger about anything can be improved upon Fig. 2). Dr. Lippisch once wrote: " . . . it is types), flown by Max Hacklinger, and with a little effort. And then again, there measured by X.F. Wortman. See graphs is that desire to add your own personal very important to know that the bottom part o f the model . . . and even a full- 3 and 4 for wind tunnel data. thing. It all comes back to the same basic Both o f these airfoils give impressive premise, that is, a great percentage of size g lid er. . . wing is the sacred side. In order to achieve optimum values of statistics and should be considered for the dyed-in-the-wool modelers have a current A/2 glider uses. That they are desire to keep abreast of new ideas and lift to drag ratio and sinking speed, the bottom part of the wing must be kept not currently in vogue is interesting, changes, and it is with that thought in but from my point o f view, the Go 803 mind that I write these articles on R/C as clean and smooth as possible . . . smooth enough to make a fly break its is not too dissimilar from the popular helicopters. Those individuals who feel Benedek sections. For the experimenter, I am “ knocking” a certain product by legs on it.” That should be clear enough. This feature will conclude in the it would be a worthwhile effort to give introducing modifications and changes some attention to either of these airfoils. are wrong. The designers o f these kits December issue of MODEL BUILDER have invested many hours and many Free Flight. DEFT DEFINITIONS dollars in producing a good package to DARNED GOOD AIRFOILS . .. Modeling is fun ... so I’ve been told. the customer for a reasonable price, and Go 801 and Go 803 Some free flighters are fun-loving and I feel that every one of them should be Both o f these airfoils were used in some just fly funny airplanes. Some, commended for doing such a fantastic wind tunnel and practical testing carried also, fly airplanes funny. I have been job ... I certainly couldn’t do it! With­ out as part o f the research behind the alternately praised and criticized for in­ out them, we wouldn’t have models to above article. In wind tunnel tests, the cluding in this column some “ humorous” experiment with, and only the scratch- results show that both o f these sections portions. Since there have been several builders would have the pleasure o f are very nearly identical over the whole issues that have passed since the last working out different details on their range o f practical angles o f attack. “humor” section, it is obviously time own brain-child. Perhaps there are mod­ After wind tunnel testing, models for another. elers who have no desire other than to were constructed to test the theories in Airfoils: Swords used for duelling in

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 ORDER TODAY 33 o m "ο ac Š O2 ®cu 3 CD 3Γ CO 2 Λ O 0) CD wj 0} CD EL 3 X CD a q. r. 05 CO 3 ο N> g CD =? a

o ac* o “ ro 5 The 1975 Radio Control Buyers Guide con­ α s I CD tains over 1300 listings. It has pictures, specs, < QJ V» descriptions, and prices for radio control boats, > 3- Ci ro Ο E. cars, airplanes, helicopters, sailplanes, radios & ro ο a *ö CD accessories. It is edited by Eric Meyers, former < * editor of the RC Products Directory. Contains ONLY $2.75 extensive indexes for easy reference. A must at your local hubby store. for every radio control modeler. flight. my best to answer them personally, or 3. Japanese tissue; 4. Condenser paper. Airstrip: In-flight performance by an in this column. Taking them one by one, we find that exotic stewardess. Thermals. · Silkspan is frequently featured in kits, Bank: Owns most o f your airplane. and is available in several grades; some­ Cessna 310: More than the sum o f Hannan-...... Continued from page 42 times called light, medium, and heavy. two Cessna 150’s. Another change, but this one brought Although formerly offered in colors, Clear the Prop: Procedure necessary about by moving, is the address of Gor­ most today seems to be white. The ma­ when taking the propeller from the U.S. don Codding, formerly of California, but terial has good wet-strength, and thus to Mexico. now a resident of Arizona. Gordon offers may be applied damp with relative ease. Cockpit: Area where chicken pilots a complete list o f plans and drawings It is somewhat porous, and generally re­ are kept. for 254 to cover postage and handling: quires several coats o f dope to be pro­ De-Icer: De man dat puts de ice on Send to: 3724 John L. Ave., Kingman, perly sealed. Strength is good, and de wing. Arizona 96401. shrinkage quite uniform. Suitable for Dive: Pilots Lounge. RUMOR M ILL large rubber-powered models and “ gas” Downwind Leg: When girl is standing One o f our East Coast spies reports jobs, but even the lightest grade is a bit sideways to the wind, skirt will be lower that a major kit company is preparing a heavy for tiny free flight models. on this leg. new line o f Peanut Scale kits. The more Domestic tissues: Here we open a Gross Weight: 350 pound pilot. the merrier! real “ can o f worms,” since this is a Knots: What stalls do to stomach. A COVER LETTER catch-all category, covering everything Loop: Prominent landmark associated Bob Whittier, publisher o f the Phineas from some pretty fine products clear with interstate highways. Pinkham Scrapbook wrote in to ask for through stuff suitable only for lining Propeller: Fan that keeps pilot cool. the real scoop on tissue. He says he has shoeboxes! Most domestic tissue has RPM: Initials of large corporation been away from modeling for a number very little grain, and will tear with equal that builds tachometers. o f years, and is confused by all the dif­ ease in any direction. It varies greatly Runway: Place where exotic stew­ ferent types, brands, claims and tech­ in thickness, weight, sheen, and porosi­ ardess starts her airstrip. niques that now seem to abound. Well, ty, and a great deal o f care is required Skyjack: Device for changing tires in Bob, you’re not alone, and we’ll take to properly evaluate it. Usually when flight. a shot at discussing the subject. one tries to determine the properties Stall: Place where airplane is kept. Although there are probably relatively and origin from sellers, evasiveness sets Taildragger: Pilot who lost bout with few manufacturers o f tissue, most offer in, which is in itself a warning to­ bottle the night before. several types. Additionally, many distri­ ward caution. Fortunately, most tissue is CONCLUSION butors apply their own names to such inexpensive, especially when compared Well, that just about ties up Novem­ products, adding to the apparent number to the various plastic film covering ma­ ber. I hope you'll stay tuned in Decem­ of choices. However, we feel that there terials, and one can afford to buy a few ber. Irt the meantime . . . keep all of are four main categories of tissue: 1. Silk- sheets for experimental purposes. As those cards and letters coming. I ’ll try span (Modelspan); 2. Domestic tissue; with most things in life, a certain amount 72 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER WANT TO W IN? P e arls Take U.S.F.F. Team Championship! Pearl Team #2 won the prestigious team honors at the U.S. Freeflight Championships at Taft. California, over the Memorial Day Weekend. In addition, Guy Kirkwood set a new Class A record of 43:31, using his FAI Midi-Pearl to make four flyoff flights after he damaged his own “A” ship. Pearl team members were Gene Simpson, Ed Cad- well, and Bill Moore. Flying Pearls in Vz A, A, B. C, and D, they outscored the toughest competition in the country. Want to win? Fly a Pearl—in any size—and be set for top performance. American Balsa Corporation V 5250 Gulfton, Bldg. 3-D, Houston, Texas 77036 of personal preferences enter in (one’s Japanese Tissue: This is the "good it certainly compares more favorably poison, etc.), so we suggest that each old days” stuff that most of the old- than the present rubber does with that builder should reach his own conclusions timers remember so fondly. Again, the o f a few years ago! But that is another by first-hand test. name has been applied (and misapplied) subject in itself. Rather than risking actual model to a wide spectrum of products. We Condenser Paper: The last commonly parts, we suggest test-covering simple have interviewed many veteran builders known, non-plastic covering material is balsa "picture frames,” in order to eval­ on this subject and also have run more condenser paper, originally produced as uate the shrinking qualities of each pro­ than a few tests ourselves over the years, an insulating material, used between the duct. Then too, examination with a and yet we still feel unqualified to make foil layers of electronic capacitors. It is magnifying glass or a jeweler’s loupe too many firm pronouncements on the manufactured in various thinesses, but can help to resolve the question o f poro­ subject! Our understanding is that the is non-porous, even in its thinest form. sity. There is little point in using extra best o f the pre-war Japanese tissue was Generally a pale translucent brownish light tissue, if an excess amount o f dope made by hand in small family-operated color, it may be dyed or painted. It is is required to render it air-proof. businesses, which no longer exist. Also, basically quite fragile, and is used mostly Colors: Some domestic tissues feature the best of this material contained actual for indoor models. It may be water- water-soluble colors. Thus, when you silk fibers, which were also the product shrunk, but has a powerful warping ac­ try to shrink it, you may be dismayed o f very small business enterprises (larger tion on delicate structures, and is thus to find the color streaking horribly. On than the worms who did the actual frequently employed in a rather “ baggy” the other hand, we’ve seen this done work, o f course!) Evidently, the majority condition. No doping is required for deliberately for effect, on such aircraft o f these activities have long since ceased, air-proofing purposes. as the Fokker D-VIII, some o f which as the result o f "progress” in Japan. All tissues may be applied with thick really did have streaked finishes. It is Then too, the Japanese have their ecol­ clear dope, a mixture of model cement also possible to “ beat the system” by ogy proglems, and some o f the tissue and clear dope, or thinned-out white applying a very fine mist o f water by firms were found guilty o f polluting glue. Each system has its adherants (!) airbrush. Why bother? Well, some very rivers with their dyes, and restrained and we suggest you experiment to find nice colors are offered in this type of from further production. the one which suits you personally, then tissue. However, Japanese tissue is apparent­ stick with it! Booo. Hisss. Domestic tissue seems to be some­ ly still being manufactured, and is avail­ what less puncture resistant than Japan­ able in colors, though not so many as Many o f the questions we receive here ese, but offers the advantage of ready formerly. At least three firms advertising at the Hangar imply that the “ experts” availability, a wide variety o f colors, in MODEL BUILDER can supply this MUST have all the right answers to mod­ both water-soluble and colorfast, and material, though the supply situation el building. We prefer to think that very low cost. In addition to mail-order varies from time to time, as with any there is usually more than one “ right model supply houses, this type o f ma­ other man-made product. As to quality, answer,” and that whatever solution terial can be found in some art and there are some who feel the new tissue works best FOR YOU is YOUR right craft stores. falls short of the pre-war levels, and yet answer! NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 73 3. G. L. Cochran 7:58 CUSTOM R/C CAR COMPONENTS CLASS B INC. 1. Sal Taibi 11:51 2. Wayne Cain 8:26 3. Ron Shaprton 7:51 CLASS C 1. Bruce Norman 11 :.43 2. Harry Murphy 8:47 3. Duke Horn 8:15 RUBBER STICK 1. Charlie Sotich 8:23 2. Geo. Perryman 7:57 3. Jim Quinn 6:53 RUBBER CABIN j æ s 1. Geo. Perryman 8:30 2. Luis Rodriguez 7:18 _____ 3. Rudy Schuh 7:08 JR/STC RUBBER HRE WINS 1975 R.O.A.R NATIONALS 1. Stephanie Perryman 3:26 EXPERT OVAL RACE! Wednesday, August 6 CLASS A-B R/C HRE performance makes the difference. Look at the 1. Jack Bolton 23:29 record in the big races. 2. A rt Peterse 12:27 3. Bruce Norman 7:40 1st. Expert Oval, 1975 R.O.A.R. Nationals CLASS C R/C 1st. Expert Road, 1975 R.O.A.R. sanctioned 1. Jack Bolton 21:21 WINTER NATS. 2. Al Schwankert Jr 7:08 3. Al Schwankert 4:40 HRE COMPETITION CHASSIS...... $144.95 TEXACO R/C Includes all hardware, except engine, radio, 1. John Pond 18:45 fuel tank, and body. Send for free catalog. 2. Bruce Norman 6:15 SPECIAL AWARDS: HRE Inc., P.O. Box 4658, Irvine, California 92664 Antique Trophy (Ehling Cup) Sal Taibi WINDUP The trophy awards for which the ban­ Compressed Air Placque Tim Banaszak Remember, when out at the model quet serves as a vehicle, were as popular ENGINE OF THE MONTH flying field, be alert. The hobby needs as ever. In spite of the number of Texan The time was 1936, and the Brown more lerts! · wins, the awards showed a surprising Jr. motor was setting the pace at $21.50, wide variety o f winners from all over with most all competition being in the the country. same price bracket. With this represent­ Peanut...... Continued from page 43 A special treat was served up in the ing a week’s salary at that time, the low Japanese tissue, with numbers and form of 16mm color films o f the ori­ Bunch Model Airplane Co., o f Los An­ letters cut from a blank decal sheet. ginal Old Timer contest held by th^ geles, caused a sensation by announcing Williams Bros. 3/4 inch wheels and 1/2 Stockton Gas Model Association in 1960. in the September issue of Model A ir­ inch scale cylinders were used to “ dress Only one film was shown as the meeting plane News a kit form o f their Gwin it up.” Note that the landing gear strut ran out o f time. Just think, we’ll have Aero engine called the Mighty Midget, from the wing to the wheel on each something left for 1976! priced at $9.85. side is a piece o f elastic (rubber band). Now if the writer can "con” the This was an exceptional break­ This allows the gear to flex without Editor into printing the results, you will through in price, following a trend start­ damaging the wing. The addition of know who did all the winning. Inciden­ ed by the Curtiss-Wright Institute people “ Les Pilotes” gives the model some cha­ tally, Northrop is to be commended for then marketing the Baby Cyclone. To racter as opposed to the "Em pty Cock­ always showing at the Old Timer Ban­ sweeten an already good deal, the Bunch p it” look. quet. It is this kind of support that Scorpion Major airplane kit was offered A small amount o f tail weight was promotes the hobby. in combination with the Mighty Midget required to balance the model. Flying RESULTS OF THE OLD TIMER for $12.00. Many a Southern Californian was satisfactory with an 8 inch loop EVENTS AT THE 1975 NATS flying field was dotted with this com­ of 1/8 flat rubber. · bination. Friday, August 8 Later on, the "m u ff” head design of Plug Sparks . . . Continued from page 29 ANTIQUE 30 SEC. the Gwin Aero was changed to a finned anecdotes about how the mouse-trap 1. Sal Taibi 8:21 head, and a kit o f this was produced as type retract gear frightened inquisitive 2. Bruce Norman 7:40 a Gwin Aero kit at $11.35. However, people. 3. David Sweeney 4:38 the Mighty Midget engine was the one (Main course o f the dinner featured that sold. Most surprising, even to this 020 REPLICA a half o f a squab, very well prepared, columnist at the time, was the ease with 1. Guy Johnson 9:04 and quite tastey. . . But a bit on the which his brother was able to assemble 2. Ron Sharpton 8:35 small side. A t one point in the festivities, the engine, and to top things o ff, it ran 3. Luis Rodriguez Jr. 8:33 Jack Bolton stood up and commended well! This was the author’s first expe­ John Pond for making such an appro­ CLASS A rience with a ringed piston type engine, priate selection for the banquet... "020 1. Bob Hunter 8:21 and the compression o f the rings was Replica Chicken!” wen) 2. Harry Murphy 8:12 looked down on. The starting procedure 74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER MODEL RACING PRODUCTS, INC. 12702 N. E. 124TH STREET KIRKLAND, WASH. 98033 M 500 ROAD RACE KIT T W .\T ^ PHONE: (206) 827-8607 NOW YOU CAN GET THE BEST HANDLING STOCK CAR KIT,

less body, for those who have a preference in body styles. Includes: Power pod with axle brake, 65 tooth drive gear, complete 14 tooth clutch and flywheel, nylon wheels with tires mounted and trued, aluminum chassis, offset kingpin kingpin front end assembly . . . guaranteed not to break, bumper, wing and mounts, hardware, linkages, and instruction manual.

ASSEMBLED AS SHOWN, LESS Model Racing Products Inc. BODY ...... $110.00 was a shade different, with the engine eling Society announced their first “ Old Bruce was officially made a SCAMPS requiring more choking to place enough Timer Bash’’ to be held at Bathdrum member, Bruce acknowledged the honor gas and oil in the chamber to build Prairie, Cour d ’Alene, on October 26. by saying, “ I always wanted to belong up compression. Five events were presented; Ignition Py­ to the Southern California Ignition The Mighty Midget was a new size lon, Ignition Cabin, Antique, .020 Re­ Fliers” (SCIFS). Between the hisses and engine, approximately a .45 cu in dis­ plica, and Combined rubber. Hope to catcalls, SCI F President Al Heilman, who placement, that opened up a whole new have results on this next month. was present, sat there grinning like a field o f model plane designs of smaller BOLTON STRIKES AGAIN! Cheshire Cat. Me too, Al! · size. With everyone highly prizing a fit­ That live wire, Cdr. Jack Bolton, an­ ted piston type engine, Danner Bunch nounces his newly formed Pensacola Vin­ Sailing...... Continued from page 33 should receive full credit for populariz­ tage MAC staged their first old timers was sailing, as these multi-class regattas ing ringed piston engines. Bunch proved contest on October 25 and 26. A unique are our only way o f comparing boats the validity of his design by producing feature was the return to the old rule from differing classes under racing con­ such complete engines as the Gwin division o f Classes I and II as used by the ditions. Aero, Tiger, Cobra, Warrior, and later Stockton Gas Model Association in the “ The first annual Indy Regatta was on, the Contestor. Truly a shame that original O/T contests. Featured at this held on August 16 and 17 at the Ramada Danner Bunch cut short such a promis­ meet were R/C assist, free flight gas, and Camp Inn, east o f Indianapolis, Indiana. ing engine design career. rubber power. The meet was held at The Indy Model Yacht Club was san­ IDENTIFIED! Spencer Field, and was directed by Jack, ctioned in early August with this being who also invites all to visit the Naval We ran a picture of Al Heilman a our first regatta. It was an open event Aviation Museum and the incomparable couple of months ago asking for some divided into two classes, over 50 inches "Trader Jones." For info, write Jack identification o f those in line. Bill Seid- and 50 inches and under. It was a week­ Bolton, Route 4, Box 113B, Pensacola, ler, formerly a very active modeler in end of exciting racing, with 33 races/11 Fla. 35204, phone 477-2055. the New York area, now living in Flo­ heats being run in light winds and sunny SAM SPEAKS rida, stated that besides the Findras skies. John Kelley, o f Adrian, Mich., was being identified, the blond haired fellow Latest information from Tim Bana- a master o f finding the puffs with 7 szak, Secty-Treas. o f SAM, indicates in back o f Heilman was Bill Kopnic, wins in the 11 heats o f “ big boats.” that Bob Elman, present editor of “ SAM owner of the Hobby Store at 71st St. “ John also mastered the ‘small boat’ Speaks,’’ will have to give up his duties and First Ave. in Manhattan. The mod­ class winning 8 o f 11 races. Jack Young els on the ground are Bill Seidler’s gull because o f health problems. In his place, of Wellington, Ohio, won 7 of his 11 wing design called the ‘Spytindyvill,' the irrepressible Jack Bolton (what races, while Bill Gitchel of Columbus, again?) has volunteered to take on the powered by Ohlsson 23 engines. If we Ohio, paddled his way to two victories thankless job o f producing the SAM Bi- wail long enough, we’ll get all the guys with his Petrel. The most exciting race Monthly. So, if you have anything of in that line named. o f the weekend was a match race be­ interest, be sure to forward it to Jack. OHLSSON MOUNTS tween John Kelley and Jack Young, He's gonna need all the help he can get! Just received the latest engine mounts each sailing LJ Boomers, that ended Address in previous paragraph. from Jim Crockett Replicas that were with Jack winning by a boat length. designed to accommodate Ohlsson 23 YOU CAN’T WINNUM ALL! “ Final standings were as follows: beam mount engines. They are also suit­ Best story to come out of Southern ‘ BIG BOATS’; John Kelley 16-1/4, able for Forster and K&B Torpedo en­ California in a long time is the case of Ray Hickok — 20-1/4, Dan Hubbard gines. A real machinist’s bargain at $6.95 Bruce Norman, Bruce and his wife, Les­ 31-3/4, Eugene Stagner — 39. ‘SMALL for a good looking radial type mount. lie, had been making the trip from Ft. BOATS’; John Kelley - 12, Jack Young CONTESTS Worth to the coast so often, the Sou­ 23-1/4, Ted Brindle - 29-1/2, Bob Thanks to transplanted San Francis­ thern California boys thought it better Huddleston — 34, Bill Gitchel 35-1/2, can, Bob Shafer, and Clarence Haught, to join ’em rather than fight ’em (based Ray Hickok - 37-3/4, Wally Gitchel the Idaho area is bubbling with old timer on the hardware hauls being made by 57, Bill Hubbard — 60. activity. The Coeur d'Alene Aeromod- Bruce). A t the SCAMPS meeting where In the 1976 AMYA balloting, the

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 Sailing Yachts Fot EASY AS 1,2,3! Radio Control HUSON 36's finished FIRST, SECOND and THIRD at the AMYA's 1975 eastern divisional championship for the 36/600 CLASS at RICHMOND, VIRGINIA. FEATURED IN THE AUGUST ISSUE OF POPULAR MECHANICS, OUR COMPLETE KIT INCLUDES FIBERGLASS HULL/DECK, FINISHED SAILS, ALL TAHOE 600 HARDWARE AND RIGGING, REQUIRING ONLY R/C, SAII WINCH AND LEAD SHOT BALLAST, AVAILABLE HOW — S1JS«» fob

LEISURE PRODUCTS 6 9 2 0 BRADDOCK ROAD ANNAN DALI, VIRGINIA 22003 AMYA 36/600 CLASS

LENGTH 36 in B EA M 9 'A In forced the plane to fly much farther, he sign, complete with shark’s head and SAIL AREA 600 sq In turned in a very respectable 2:17. Steve teeth. The head was molded from fiber­ $38.95 Work flew in lift that stayed on the glass and attached to the wings per­ course, and posted a 2 :0 1, never getting manently. The two halves, joined over more than a hundred feet downwind o f the radio compartment, attached to the the pylon poles. pod and boom fuselage. A large alumi­ VALKYRIE num skid projected from the bottom AMYA 50/800 CLASS Only six o f the 133 fliers flew in the scale competition. Ken Wagner flew his o f the fuselage behind the center of LENGTH 50 In B EA M H \ In $74.95 Libelle 301 into good lift on two suc­ gravity, to insure a nose down attitude SAIL AREA 800 sq in cessive flights and got the 3-1/2 minute on landings. Complete kits include molded plastic maximum time, as well as the bonus Ttiis would seem to be a good way hull and components, all rigging, finished spot landing points. Ken’s Libelle used to prevent zooming back up o ff the sails and semi-fipished wooden parts. balsa sheeted foam wings with a scale ground on hot landings. The wing can’t aspect ratio. It was nice to see a model come back up if i t ’s being held at a TAHOE SAIL SYSTEM $27.95 o f one o f the current fiberglass super­ negative angle o f attack by the skid. Dave Shadel, the man behind R.T.C. VALKYRIE SAIL SYSTEM $35.95 birds with the long, narrow wings ac­ curately reproduced. Ken’s outstanding Models, o f Escondido, Calif., flew his flight performance, together with good, brand new original. This twelve foot JJttfflPrAVcV· but not highest, static points, netted ‘Grand Daddy Windfrce’ used large flaps 11715 Adenmoor Ave. Downey, Ca. 90241 him the first place trophy. to control airspeed, with positive (down) Calif residents add 6 * tax DEALERS WELCOME Don Edberg’s Duster flew well, but flap to slow the plane up in thermals, suffered in the static judging from a and negative (up) flap to increase speed lack o f cockpit detail, still netting a penetration. Although Dave had only following were elected to two year terms 2nd place trophy. Col. Thacker’s Bowlus been flying the plane for one week, he as AM YA Directors: Ron Menet (Ca.), Baby Albatross (MB Plan, September still managed a second place trophy in Dennis Eason (Canada), Les Conner 1975) which won the scale event at the Unlimited class. (Mass.), and Dick Hein (III.). These are 1975 S.O.A.R. Nationals, didn’t fare so The most attention getting design at the fellows you should talk to with re­ well in the L.S.F. Tournament. The the Tournament was the Split Tee, by gard to your feelings about rule changes, 8-1/2 pound model o f the famous home- Joe McClaran.of Visalia, California. This procedural problems, and so on. They built glider won the static judging by a pod and boom T-tail uses a most unique are serving without any compensation, clear margin, but the thermal Gods were double rudder which can be spread open and their jobs get bigger every year as not with the Colonel, and two very short to act as a dive brake/spoiler (Not new, AMYA rapidly approaches its 2000th flights knocked the Bowlus to third but not common, wen). Joe used a member. In other races, )ohn Ball was place. Terry Koplan made an excellent mechanical mixer, similar to ones used reelected to the post o f 50/800 Class attempt on a very challenging subject. . . for V-tail installations, to actuate the Secretary, and John Maloney took the the Glasflugcl 604. The full size, Open rudders. A t less than full separation, reins of the S/B Class. Class super-soarer has a 32:1 aspect there is still directional control. The Remember to send in your dues to ratio, which Terry faithfully duplicated Split Tee is another brand new design, the AMERICAN MODEL YACHTING in the model. This creates a wing with a and Joe was still working the bugs out ASSOCIATION, 3917 Sunnyside Ave., seven inch root chord and a 2-1/2 inch at the Tournament. Let us know how Brookfield, III. 60513. They will be the tip, all o f this spread over a twelve foot it works o u t... OK, Joe? best five dollars you ever spent. And span. Better flight times would have put Co-contest directors Bob Hahn and register any sailing vessel for a one time Terry much higher in the standings. John Donelson saw to it that the over fee of one dollar while you are about it. The point spread between the Un­ I’d be glad to hear from anybody 800 launches went o ff smoothly. A limited and Standard class winners was either directly at 7608 Gresham St., Fountain Valley Cub Scout pack was somewhat unusual. The spotty lift con­ enlisted to retrieve winch lines on bi­ Springfield, Va. 22151 or through MOD­ EL BUILDER. Please let me hear what ditions gave the larger planes somewhat cycles. This was necessary, as no motor of an edge in the longer flights. In fact, your concerns are, as well as your ques­ vehicles are allowed on the runways at Col. Thacker, who won Standard class, tions. They will help make this column Mile Square. Local club members saw didn’t get the ten minute max on his more relevant to the needs o f the skip­ to the frequent changing o f winch lines final flight, posting a time a little over pers. · which eliminated much of the broken- seven minutes. But, his performance on line problem that has become traditional the other precision and speed tasks more from flying over Mile Square’s "expo­ Soaring...... Continued from page 23 than made up for the points lost for nential sandpaper” asphalt. As a result up so far down wind at the end of the the short time. of this preparation, and a hard working course that he had to stu ff the plane Several new designs showed up in winch crew, each round was completed into the ground just to be sure that it the Unlimited class. Bob King, o f Phoe­ within two hours. That figures out to was down. Even though this approach nix, Arizona, had his new "Jaws” de­ better than one launch-per-minute, over

76 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! Mo d e l b u il d e r a six hour spread on each o f two days. Congratulations, John and Bob, on a job well done! Next month I’ll start (as promised) on a series of articles on new techniques, and materials for sailplanes. We’ll take a look at conventional wing structure, and present some thoughts on how to im­ prove that type of wing, and then move on to some techniques for working with styrofoam wings. At that time I will also have some information on the results o f some new NASA research on low speed aerodynamics and a new airfoil that looks very promising for use on a thermal soaring plane. See ya next month . . . in the meantime whydonchagoflyina- thermal? 1975 L.S.F. TOURNAMENT RESULTS Unlimited Class Pilot Plane Score 1. Bill Nibley Pierce 970 5767 2. Dave Shadcl Original 5583 3. Rick Walters Rainbow Wings 5557 4. Rick Pearson Leo 5096 5. Terry Koplan Windrifter* 501 I 6. Dave Thornburg Windrifter* 4999 7. Neil Nolte Cumulus 4851 8. Peter Parszik Javelin II 4826 9. JimTomblin ASW 17 4787 10. Fred Weaver Aquila* 4726 ♦Standard Class planes entered in Unlimited Standard Class 1. Col. Bob Thacker Mod. Hobie Hawk 5345 2. Rod Smith Windfree 5330 held. Mile Square Park in Fountain Valley, 3. Lorin Blewett Windrifter 5312 Another idea I ’d like to pass along Ca. on December 7th. The new rules 4. Mark Smith Windfree 5134 this month is Tom Laurie’s stabilizer are that monoplanes must have a wing­ 5. Steve Work Windrifter 4961 trim adjustment mechanism. Boy, that’s span o f at least 36 inches and biplanes 6. Bob Slater Windrifter 4842 certainly a mouth full for an easy-to- must span at least 30 inches. Each mod­ 7. Jim Wiseman Hobie Hawk 4791 make unit. See Fig. 3. Tom used this el must have a pilot, and the models 8. Jim White Aquila 4619 in his “ Jeep,” and it really proved out must also R.O.G. The models receive 9. Howard Sears Pokey 808 4593 during the test flying stages. This me­ one point per second up to the number 10. Kelly Pike Hobie Hawk 4577 chanism, coupled with an adjustable o f scale points the model receives from thrust bearing, really allows versatility static judging. Hope to see many o f you Scale in getting a model trimmed out rather there. · 1. Ken Wagner Libelle 301 766 quickly. The idea o f going to a full 2. Don Edberg Duster 754 stab/elevator trim is that it will hold an R/C Auto . . . . Continued from page 31 3. Bob Thacker Bowlus Baby adjustment better, and these adjustments der 2 1 seconds on lap times, with the Albatross 701 can be made in very small increments. rest o f the Associated team not too far 4. Bob Elliott Glasflugel 604 650 Often, with the more conventional me­ back. Anyway, I unpacked and put my 5. Terry Koplan Glasflugel 604 587 thod of using copper wire to attach the transmitters and batteries on charge. elevators to the stab, the elevators Open practice on Wednesday allowed may move in any hard landing. If they each competitor to get about five prac­ F/F Scale . . . . Continued from page 40 are not constantly checked, a destruc­ tice sessions of 10 minutes in both the a nifty free-wheeling device, which also tive crash could result. oval and the road. Earl Campbell’s oval * * * permitted easy interchanging of propel­ car looked good and he was cooling it, lers. Vince has promised to get this Vintage Aero has once again come slowing and passing where it was very novel idea on paper so that I can pass it up with what I consider a very important safe. Jim Cade looked good, too. Mike on to you. item. They now have basswood in various Morrissey, who arrived that morning, Second place winner, George James, sizes in 26-1/2 inch lengths. Most bass­ John Thorp, and others (me too) were was flying a Wedell Williams. George’s wood that can be obtained in model struggling to get the right combination. model had all the numerals, etc., done railroad shops is a scant 18 inches long. I had trouble getting used to the front with silk screening, along with an unusual The number of goodies that Vintage straight, because I seemed to want to method o f finishing. This too will be a Aero has in its catalog is growing more make it parallel to the back straight. subject covered in a future column. all the time. It is available for only a Since the far turn was smaller than the All in all, the Thompson was the buck. Vintage Aero, 1 The Glen, Tenafly, near turn, I had a tendency to drive into most fun I’ve had at a contest for quite N.J. 07670. the outside wall. Most cars didn’t have a spell, and taking 3rd with my Goon In closing this month, I want to re­ enough steering because of the traction, kind o f helped. We are all looking fo r­ mind you that the Flightmasters Peanut/ but I had too much. In the amateur class, ward to the nest time this event will be Jumbo rubber contest is scheduled at Chuck Phelps looked rapid and con- NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 77 RG'S ’P itPak" • High Efficiency Roll Pump • Transformer Charger • Hot Glo-plug Power • Rugged Construction • 1.33 Gallon Tank • Nicads Included • Tool Caddy • Red, Blue or Green

A real savings at $39.95

P.O. BOX 406 ST. JOSEPH, Ml 49085 Michigan residents add 4 % sales tax PHONE (616) 429-3528

but controllable, and he was blasling ling the engine. After the race I looked through the big banked turn near the at the inside wall and saw that it came drivers stand, turning times around 8 back out closer to the inside line at that seconds flat. John Thorp was getting p o in t. . . a good place to stay away around the track consistently and Car- from during racing. I richened up the bonell was going smooth and rapid. My engine for the second heat, because after oval car was going good, with narrower restarting in the first heat the engine front tires, except in the last practice was lean. The engine 4-cycled through session, when it got squirrely. Later I the second heat but driving was much found both rear wheels loose. easier and the time was good enough In the road course Welch again looked for fifth qualifier. Mike Morrissey was JUWESS At V Urt·***» »MOO· V O W ' « α Λ VM t «0 *CuWnEP P f 5 ■■*·<·· « . r o tim ι ό « c nun n v v«* t to good and Bill Steele was going great running fast, but had trouble in both aueetp srcoct plans with his Taurus, getting times in the heats and didn’t make the cut for the O«cowor*n v. μ . <*»« wt n.·!· Mcaxs 0«M M 1 (A»*e *«ii « *ou nv low 2 l ’s. Earl Campbell ran his oval mains. ΟΊι λ r taw n t a us· mwooKiro· OKUm ftJLOM. « IMI TFS I i 00 car after controlled practice and was I believe Bob Sneeringer won the first amateur oval main and had a good time. d.T.c. d c /iq o getting times just over 8 seconds. I didn’t 1M mwwao· «c ^ feel too bad since my oval car had laps In the second amateur main Glenn Larue a m / « mpi «■ m i in the 7.9’s. won, with Chuck Phelps second, and sistent. After two days of practice, I learned winning time good enough to push The road cars in general looked a that you couldn’t really run oversize Sneeringer back to second place overall. little better. Most of the Associated team tires because they had bad hop prob­ In the first expert oval main there looked good because they had been prac­ lems on the faster tight corners and was quite a bit of dicing going on, with ticing several days. Bob Welch’s MRP down the straights. Chassis bend, lon­ several leaders. After about 25 laps Earl looked impressive with super go, stop gitudinal, probably also entered in the Campbell took over first with Bill Jianas and steering (that Alfa front end!). After bouncing on the straights, so a really and Roger Curtis following. Earl was some radio problems, Rich Lee jetted at lightweight chassis wasn’t good. After pulling away, but after a few laps he about 21 seconds. Morrissey, myself and hitting the boards many times I con­ hit the protruding inside wall on the more, were struggling with tires, engines, cluded the boards would always win. back straight and broke a rear axle. etc. Ed Pennewill’s Delta car wasn’t So I got to work on my oval car and Jianas then took over the lead and super-fast but had a good line and was made a front bumper which went fur­ eventually won the first main with his consistent. ther along the top of the chassis and Magnum car, having no problems. Roger The local racers were allowed on the installed longitudinal rails under the Curtis finished second and Earl Campbell track after 6 pm. Gary Swiman was out front axle mounts to strengthen the chas­ came back for third, both with Associa­ quickly and showed a new line around sis. Rear tires were worn to about 3.2 ted cars. the track. Gary’s line was right on the inch diameter and getting better all the Just before the start o f the second inside boards, on the turn after the back time. I just switched tires left to right. expert main, my pit crew got the needle straight, and the next long left hander, Friday morning saw some rain come, valve adjusted perfectly. A t the start, I too. so racing didn’t get started until about got my usual slow start, but pulled into A t the end of the day, both of my noon. I think there was a quick 5 minute the lead at about 10 laps. My HRE car cars looked like destruction derby spe­ round before the oval qualifying. In the was handling my way . . . a tad o f high cials. The permanent boards were mur­ amateur heats, Chuck Phelps, of Phoe­ speed understeer. . . back o ff the throt­ der on So-Cal specials. The low front nix, had his Scorpion car going good and tle for a fraction o f a second entering bumpers caught under the boards and Bob Sneeringer, o f the D.C. area, had the corners, then on again. I was able the lightened bumpers bent. There were his Associated set up to do just about to catch most cars on the straights, hesi­ bends in both chassis and the bodies what he wanted. In the expert quali­ tate, then take them on the inside of cracked. I bent a rear axle on each car, fying, numerous drivers looked good, either corner. which hasn’t happened since going to including Earl Campbell, Arturo Car- On my pit stop at 40 laps, the engine hardened axles in 1972. I had lots of bonell, Jim Cade, Tom Wisvader, Dave flamed out. By the time I got back on work to do that night. Chin and Roger Curtis. In my first heat, track, Don McKay had gone into the By Thursday most everyone was get­ I had just taken the lead when I hit the lead with his MRP car. After a few laps, ting the knack of driving the track. Mor­ inside wall at the end o f the back I was back in first place as McKay rissey had both of his Taurus cars going straight. The car went completely across flamed out in the pits. I was able to good. His oval car looked a tad twitchy, the track and hit the outside wall, kil­ stretch my lead to about 2 laps with 5

78 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER NEW...TEMPERATURE COMPENSATED NYROD A ROD FOR ALL SEASONS

NEW 8 METAL ROD IS PERFECT FOR THESE INSTALLATIONS - BEND AS NECESSARY NYROD inner tubing

NYROD outer tubing NEWI 8" METAL ROD SU-PR-KLEVtS

to go. Cooling it a little, I started taking our heat, and I got headed into the a safer line in the far corner. . . more boards several times, so we didn’t fare SCALE PLANS to the middle of the track . . . since I too well. In the last heat, Mike Morris­ byWESTBURG had really been cutting it close on the sey showed the way with his Taurus car. inside. Then with half a lap to go I Even with two pit stops in 25 laps, Travel Air 2000 (2 Sheets) smacked the outside wall! However, I he ended up with quick time o f the day. 1" = 1.0 Ft. $4.00 got the checkered flat at 75 laps, and Matt Azzara and Earl Campbell lost gears Waco ATO Taperwing ( ·· ) McKay was second, about a lap back. or wheels and Gene Husting blew an 1” = 1.0 Ft. $4.00 John Thorp ran a consistent race with engine. Lots o f work had to be done his Thorp car to finish third. The second that night. Blackline prints, 3 0 "χ 4 2 ” , mailed expert oval main times were good enough B u t. . . the drag races were resche­ folded in No. America. Add 50i per to push Bill Jianas back to third place duled for that night. I had to make set for First Class 8i 65tf for Air Mail. overall. changes to the car and get ready for the For rolled prints, add S1.00 per order. Then on into the amateur road quali­ big day and went to the motel, so the Send S. A.S. E. for complete list. fying. Bob Sneeringer again had his comments made here are second-hand. Associated motating, but a wheel came Several racers did not run in the drag PETER W. WESTBURG off. Jay Costa was flying with his Mar­ races, even though they had cars, because 834 Seventh St., No. 6 ker, turning laps around 20.6 to 20.8 o f required work on their road cars. Santa Monica, Calif. 90403 seconds in the clear. Any expert would The drag site was good, but the surface have taken his time, even then. did not have enough time on it to ‘‘come later, Kent Stroh, the race director, Saturday morning came quickly, since in.” Consequently times and speeds suf­ called the race. The decision was a hard I didn’t finish my oval car-to-road car fered. Cars which turn the 165 ft. in the one, but rain was forecast for the next conversion until 5 am. By the time I got low 3 seconds at home tracks were lucky day (and it did rain). to the track, the amateur road practice to get close to 3-1 /2 seonds. The concours event was staged under was Just ending. Expert road practice Carl Petri had his scratch-built rail the car parking covers o f Rattey’s res­ rounds o f 5 minutes started. Morrissey’s running good, but lost to Mike Carone’s taurant. Gil Anderson’s immaculate Fer­ car was going super. Steele, who had hybrid Associated in the finals. Mike is rari won. Details were fantastic. The looked good earlier, had done something back to two servos with a good brake interior, suspension and engine looked wrong cause his car looked like a hand- because o f reliable operation. In funny like the real thing. A Veco engine was full. Pennewill seemed to be going a cars, Chubby Caruso was going good for buried under the scale V-12 engine and little faster and smoother, and Swiman his frist try at the drags. Reba Steele differential. The radio equipment wasn’t looked impressive. Campbell, Husting, got third place when she could not ad­ noticeable either. High/low beam lights Curtis, Azzara, Lee, Carone, Kroellsand vance after red lighting, and her com­ and tail lights were functional. Tires for Albu all looked good too, although most petition crossed over into her lane (he the car even had identifying chalk marks o f them hadn’t run their road cars since didn’t advance either). So Bob Welch for L/R #5 etc., as in real cars. The Wednesday. Welch seemed to be having went to the final with his MRP against second place McLaren of Bill Miller trouble turning to the right. Later he Carone. Welch won the funny car class would have won concours just about found his servo had gone kaput. My when Carone blew a glow plug right out anywhere. car was good, but the engine was way o f his engine. Seems that Bill Steele is I was very sorry and shocked to hear lean and the brakes poor. I found my the caller for his wife, Reba. Bill watches that Gil Anderson died three weeks brake band liner had come loose. So I the lights and taps her shoulder when earlier o f a heart attack. One o f his last richened up the engine idle a little and its time to GO. Just wait 'till they get wishes was to have the car shown at the set to work on a new band liner. their timing down. ’75 Nats after spending the last year In the first round of expert road Again on Sunday, I didn’t get to the constructing it. Ray Dixson and Ed qualifying, Ed Pennewill’s consistent track until the end o f the second round Heck, o f Florida, did a terrific job of running paid o ff, as his Delta car got o f amateur road qualifying. Many o f final preparation and showing the car. best time in his heat. Eric Hahn jumped the times looked better. Eric Robarge The awards banquet was about the to the lead in his heat, running no wing must have jetted with his Delta, because best I ’ve ever attended. The food was on his car, and had a very clean heat to he beat Jay Costa’s time. Bob Sneerin­ very good and the awards (trophies and get a good time. Roger Curtis and Rich ger obviously didn’t have problems, merchandise) were terrific. Lee, with Associated cars, were in sepa­ ‘cause he now had third fastest time. A ROAR meeting was held after the rate heats, and both ran well to get Then into the expert heats a half banquet. Many topics were discussed, identical limes. Dell Fisher (Marker) and hour ahead of schedule. But soon after including concours, international com­ I (HRE), tangled a couple o f times in the first heat the rain started. Four hours petition (Ted Longshaw of England ex-

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 mula car oval nats will give that race the status it deserves. Second . . . two classes Need Help With Your Heli? > o f cars can still be run at the ROAR Nats and will allow running the stock We’ve Got It! cars as the second class (stockers haven’t run at the nats yet). The stockers could S. C. Modeler stocks everything for the Model Helicopter hobbyist. We have run the oval or the road course (back­ replacement parts and kits for all popular helicopters. And we'll custom build. wards?). Since drag racing always seems to cut Expert advice is available, into the schedule o f the other two clas­ too. We've built and flown al­ ses, I think one complete day should be most every helicopter model scheduled for drag racing only. That known and we now have over way, a reasonable amount o f practice can 1,000 hours of flying time. be had and the track allowed to “ break in.” Also, a detailed set o f drag race We have everything for the rules should be established, including modeler . . . Helis, Planes, double faults and proper staging (after Cars, Boats, Radios, and spare staging, a car should not be allowed to parts. move back to get a hole shot). Call or write . . . ask for That’s i t .. . finally. I had a great Lloyd Wheeler. time at the 75 Nats, even with the rain- out. But maybe that’s because I did well in the oval race. If you have any opinions on Nats events/conduct o f the restricted s.c. horsepower class, drop me a line c/o f t H O B B Y S H O P MODEL BUILDER or c/o HRE Inc., 995 North McLean Avenue, Elgin, Illinois 60120 (312) 697-3737 P.O. Box 4658, Irvine, CA 92664. See you next month. 1 975 ROAR NATIONALS RESULTS Amateur Oval (Main Event) Pos. Name Avg. Lap Time DAV I ES-CHARLT0N 1. Glenn LaRue 10.29 .15 RAPIER 2. Bob Sneeringer 10.69 0 IC6CL $29.95 PP. 3. Chuck Phelps (T.Q.) 10.76 R/C »35.45 PP. 4. Bob Williams 13.90 5. Neal Prantner 14.93 6. Bob Heilman 14.94 . . . this beautiful M onocoupe by Megow? 7. Bill Miller 15.23 One o f the four most super-detailed 8. Bob Kaczmarek 15.90 plans that Megow ever made. HOBBY- HIDEA*AY,0ELAVAN, I LL 9. Bill Hobson 16.90 We have this, plus many others, print­ 10. Ralph Gombach 17.65 ed in clean black line. For catalog, send (309)244-7389 61734 ,50c . refundable with first order. Expert Oval (Main Event) GOLDEN AGE REPRODUCTIONS 1. Chuck Hallum 8.99 P. O. Box 13, Braintree, Mass. 02184 2. Don McKay 9.33 3. Bill jianas 9.35 4. John Thorp 9.47 pressed the feeling of many European can really keep everybody interested and 5. Roger Curtis 9.88 racers), nationals events and engine aware o f what’s going on. I didn’t even 6. Earl Campbell 10.42 horsepower. Two important matters have to yell at my pit men about posi­ 7. Bob Welch 10.43 were resolved. The President, Roy tion and lap information. 8. Tom Wisvader (T.Q.) 11.37 Moody, is to appoint a Nationals Com­ I would like to thank all the fellows 9. Gary Swiman 12.16 mittee, probably to be headed by Bob who gave me assistance at the race, par­ 10. Jim Cade 12.18 Stevens, to propose regulations and ticularly Bob Sneeringer, Ed Pennewill events for future ROAR Nationals. Also and Eric Robarge. I ’m sure everyone Amateur Road (Best o f 2 there was approval for a committee to gives their thanks to Kent Stroh, mem­ Qual Heats) propose regulations for a restricted en­ bers of the EM ARC and NASCAR clubs, 1. Eric Robarge 22.15 gine horsepower class o f racing to be and all race personnel for putting on a 2. J ay Costa 22.69 headed by myself. I ’ve been proposing a super race at a super track. And special 3. Bob Sneeringer 23.20 class like this for two years, so they got thanks to Bill Rattey, for his great job 4. Chuck Phelps 24.47 even with me! The vote was heavily in in getting and keeping the track in top 5. Bill Coalson 24.50 favor of the restricted horsepower class, condition for the 75 ROAR Nats. 6. Neal Prantner 24.56 and I wish to thank all o f our readers PERSONAL COMMENTS 7. Ray Fortier 25.02 who wrote in. The response shows that One topic discussed at the ROAR 8. Ted Longshaw 25.22 lots o f racers who didn’t make it to the meeting was that o f making the May 9. Bob Rexrode 26.18 Nats are also in favor of a new class. Indy race into the Oval ROAR Nationals. 10. Mark Heck 26.22 The atmosphere of the 1/8 scale 75 There was considerable adverse reaction, ROAR Nationals was enhanced by Bob because lots of people could not get to Expert Road (One Qual Heat) Stevens, “ The voice o f R/C car racing,” that event plus the ROAR Nats. After 1. Mike Morrissey 22.44 who was on hand to announce all the considering the idea for a while, I think 2. Eric Hahn 22.59 qualifying and main events. Bob knows it’s a good idea for two reasons. F irs t. . . 3. Ed Pennewill 22.92 a lot about racing and the drivers, and making the Indy race the official for­ 4. Roger Curtis 22.93

80 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER 5. Rich Lee 22.93 6. ) im Cade 23.08 7. Dennis Towry 23.18 NORTHROP GAMMA 8. Gary Swiman 23.36 1172 SCALE 9. Mike Carone 23.53 10. Dell Fisher 23.58 Drag, Rail 1. Mike Carone 2. Carl Petri (Top Time 3.55) 3. Bill Campbell 4. Kim Myers Drag, Funny Car 1. Bob Welch 2. Mike Carone (Top Time 3.69) PLASTIC KIT FEATURES: THIS KIT MAY BE FINISHED IN EITHER OF TWO 3. Reba Steele TWO DIFFERENT ENGINES 4. Chubby Caruso CONFIGURATIONS: TWO DIFFERENT COW LINGS FRANK HAWKS' Concours TWO DIFFERENT NOSE SECTIONS "SKY CHIEF" OR 1. Gil Anderson 95 pts. TWO AN D THREE BLADE PROPELLERS DR. ELLSWORTH’S 2. Bill Miller 81.75 pts. TWO DIFFERENT CANOPIES "POLAR STAR" 3. Bob Welch 72.50 pts. DECALS BY MICRO SCALE PRICE: $2 .95 FROM YOUR DEALER OR ORDER DIRECT. ADOING 15% POSTAGE AND HANDLING Starduster.... Continued from page 50 ALSO AVAILABLE: BOEING 247 AND MARTIN B-10B basic Starduster. I decided on the latter, SEND 25c FOR COMPLETE CATALOG DEPT. M B purchased it, and took it home. JĚL.__ 8» » » > ί 181 PAWNEE STREET · SAN MARCOS. CALIFORNIA · 92069 I have been using Hot S tuff sparingly for field repairs and some construction, but had not yet attempted a complete construction job with it, so thought this would be as good an opportunity as any to try it also. Some o f the things I learned may be an aid to modelers who haven’t yet tried this newest addition to the modelers necessities. A little background is in order, be­ fore the sticks start flying. Sal Taibi designed the original Starduster in 1958, THE NEW PORTABLE and to my rather narrow mind it is one compact car of the two truly original designs MINI-ANT IC. SIZE. .19 T 0 . 2 9 ENGINES- e n j o y t h a t r e l a x e d ever laid out in the free flight field. ANTIC FLYING. $ 5 4 .50 & POSTAGE (The other? Valkyrie, by Carl Goldberg, which was the epitome o f the pylon FOR DESCRIPTIVE BROCHURE SEND 50ť IS'LOL PROCTOR·; PO BOX 9 6 4 1 , SAN designs that dominated the forties and DIEGO. CALIF. 9 2 1 0 9 - Mfgd at 6 8 2 1 Convoy Ct fifties). San Diego. Calif. First kitted in 1961, over thirty thou­ sand Starduster kits have been sold, rare commodity can be used! which has to make this one of the most “ Hot S tuff” is a generic term for one block comes into play next. Using No. popular designs in the free flight field. of a whole family of 'Instant Miracle 220 sandpaper, I lightly sanded the bot­ Between 1962 and 1967, the Starduster Glues’ just coming into use in the mod­ tom o f the panel without blowing the series, (the X, 600, and 900), won 80% eling fraternity. It is a clear fluid which, balsa dust away from the frame, then of the first, second, and third place tro­ when deprived o f oxygen, polymerizes went back and reglued all the joints. phies in Nationals competition, a truly into a hard crystal form. Its ’kick’ time The balsa dust acts as a binder on the remarkable feat, and the airplane is still can be regulated precisely by the chem­ joints this way, and the structure is com­ highly competitive today, seventeen ical formula used in its manufacture, plete and ready for covering almost years after it was first conceived. from two seconds to twenty-four hours, faster than I can write this. The kit for the Starduster retails for without affecting its final strength. Hot The one spot I deviated from the nor­ $7.95, and is one of the finest on the Stuff will kick, or harden, in about ten mal construction procedure (Aha! wen) market for the money. The spar stock is seconds in normal use. was on the laying o f the second fuselage still chosen for lightness, strength, and Building the Starduster with Hot side on the body framework. The Star­ grain quality (my kit had two fairly Stuff made the job almost obscenely duster fuselage is built by laying 1/8 x hard piecesof tapered trailing edge stock fast. To frame a wing, for instance, the 3/8 strips on the one printed fuselage for the wings, and one light-weight grooves are cut in the trailing edge stock side, and gluing them in place. The pylon quarter-grain piece o f tapered stock for with a flat razor file in order to leave is supported by 3/32 square on each side the stab), and the die-cut sheets are so a ‘fuzz’ in the slot. This fuzz acts as a o f the fuselage, which is then covered cleanly cut the parts outlines cannot be binder for the Hot Stuff. All ribs are by a second, unprinted, balsa sheet. I seen. inserted in the trailing edge slots and a was concerned that I wouldn’t know The plans, when unrolled, contain tiny drop of Hot Stuff is put on each where to put the Hot S tuff on the out­ three sheets o f genuine japanese tissue, joint. Immediately the leading edge stock side of the fuselage in order to be certain one orange and two white. This alone can be positioned against the ribs, and o f good glue joints on the inside, so should be enough o f an incentive to the spar inserted, and again a tiny drop used the printed fuselage side as a pat­ finish the airplane, just so this extremely o f Hot Stuff put on each joint. A sanding tern to mark the second unprinted side

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 upward movement o f the stab to 60° when dethermalized. FOR THE BEST IN In fact, I was so fanatical about build­ STANDARD CLASS ing it stock that I cut the word “ Star- HSTR0 FLIGHT inc duster” out of the plans in black tissue PIONEERS IN SILENT FLIGHT $54.95 13377 Beach Avenue and doped it to the top of the wing Venice. California 90291 where it is shown on the plans, and cut AS-W15 out the name-and-address label from the W ing span · - - - 1 0 0 " plans and used it where shown on the Area - · · 650 Sq. in. plan, on the left side of the pylon. Flying weight · 38 Oz A final check before flying showed all For 2 channel R/C wing and stab panels flat and the fuse­ Rugged molded STD. HI -START $24.95 lage straight, except for about 1/16 inch plastic fuselage ASTRO START $29.95 wash-in on the left inboard panel o f the Machine-cut ribs wing. ALSO: M O N T E R E Y Span 100" -$34.95 My adjusting procedure, as mentioned M A L IB U Span 7 5 " - $25.95 earlier, has sent women weeping into A S -W 1 7 ------Span 134"-$79.95 their homes, and strong men have blanched with fear and dived for cover at the first “ Pop’’ of my engines. I fol­ The historic The m e lowed my usual procedure in this test. B e l l a n c a "S k y r o c k e t " The first flight of my brand-new shiny orange Starduster was with a five-second The M engine run and the prop mounted cor­

S II.Í5 Afcuiocaupe rectly. I meant to turn it around to re­ duce the thrust, but forgot it. 41- WMMMM. .04» »Owtn. »OB «4 00 •O.IMAM- 22 V J- WINGSPAN FOR CMTnOi ue to thb£ ( CHemrtis F\£BIN J4 V2‘ WINGSPAN. .020 POWER RUBBER. C02.0R 010 POWER A BIT 4 M4ůt44IC£N1 MlWIlOh 0» 41* 4U.-T11* OF NOSTALGIA ANOA DEuOMI TOBUllO The wash-in in the left panel created »AYORiTF AIRCRAFT. FOS PULSE A NO SMALL WUlTl 17.25 RAOiO CONTROL UNITS CAN BE enough drag to pull the airplane around A TRUE CLASSIC FROM THE "OOLOCN ERA" FLOWN FREE FUOMT ON RUBBER. HITS INCLUDE TOP QUALITY PRlNTEO BALSA. into a tight left turn at about twenty feet o ff the ground, and it bored around The P1AHS 0ML1 in fifty-foot circles until the engine final­ S t e a r n u f n C 3 B ly quit. It then stabilized into a smooth H ' W1 NO SPAN, ftt* POWER. FOR S 2 Æ2 CONTROL UP TO THREE CHANNELS glide, and we came out from under the »STORY WAFER BEFORE WORLD WARM car to try it again. $12.25 I cut a small trim tab into the vertical fin, about one inch long by 1/4 inch FLYLINE MODELS deep, and bent it 1/32 inch to the right. HOBBY DEALER· 10643 ASHBY PL FAIRFAX. VA 22030 This straightened out the power pattern a little, and on the second flight the with a series o f pin holes. After the tional top wing spars, which some mod­ machine made three turns to the left framing and pylon was mounted on the elers add, were not put in, the fuselage under a ten-second engine run. printed fuselage side, I laid the second was not.feefed up, (and made heavier,) Another tab was cut in the fin, about side on the assembly and put a small and the regular tips were used on the hall the size o f the first one, and dis­ drop of Hot S tuff on each pin-hole. wings and tail rather than my fancy placed the same amount, and the air­ Voila . . . as they say wherever it is they "Hoerner’’ type tips. As a result o f this plane was VTO’d with a full fifteen- say that... a strong, light, virtually strict adherence to the plans I managed second engine run. This time the power warp-proof fuselage in less than an hour’s to come up with an excellent flying pattern was perfect. . . two wide circles work! machine. to the left under power with a smooth I was concerned with using Hot Stuff The one note I couldn’t find on the transition into a nice "Starduster” skid­ around the firewall, and seriously con­ plans concerned the warps to be put ding left glide circle. sidered using an epoxy, but finally into the wing. A quick call to Sal Taibi, So in three flights the machine was talked myself into simply sanding the the designer, assured me that the wing fully trimmed, even with my devil-may- face of the motor mount flat with a should be flat, with no warps at all! He care technique, well enough to be a com- sanding block and then sprinkling a small also told me the original weighed in at etitive ship. No glide trim changes were amount of balsa dust on the balsa before 6-1/4 ounces with a Holland Hornet necessary, and with the balance point I fitted the plywood engine mount in (remember that one?) and a Holland at the location on the plans, the machine place. The back of the plywood was Timer Tank. glided perfectly w ithout any incidence also sanded lightly, to remove any traces After finishing my version with ni­ changes being required. of resin which may have oozed out of trate dope, three coats, and one coat of Coincident with my testing o f the the wood since it was glued together. Hobbypoxy clear for fuel proofing, it airplane, one o f my acquaintances, Eddy Then I just held the plywood firewall weighed in at 6-1/2 ounces, with a Cox Flock, accepted a challenge to build a against the prepared balsa blocks and Tee-Dee .049, the Competition Models free flight, and chose a Starduster also. liberally dosed the joint with Hot Stuff. Tank-mount, a Tatone Half-A timer, and His was completed and tested at the A t first I thought I had used too much, a Tatone Bladder tank. same time, and his ship, due probably which makes the ‘kicking’ time much The only deviation I made from the to better building techniques, was trim­ longer, but within five seconds the ply­ plans (Aha again! wen) was to move the med in two flights, requiring only the wood felt warm to the touch and vapors dethermalizer snuffer tube from the addition o f a 1/32 plywood shim under and smoke began to issue from the joint. rear o f the fuselage to a point half-way the trailing edge of the stabilizer to fly In less than thirty seconds I had one of up the fuselage on the left side, to make perfectly. The punch-line?... He has the firmest firewall joints I have ever it easier to check that the fuse was lit built only radio-controlled bcasties be­ seen on a model this size. before launching. A short piece of Per­ fore this, and he really enjoys not having I was determined to build the airplane fect I/2A lead-out cable was strung to worry about crashing his airplane after absolutely stock. Therefore the addi­ through two small wire loops to lim it the it’s in the air!

82 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER HARBOR TUG "DOUGLAS GREG" COMPLETE FIBREGLASS R/C KIT OF THIS FABULOUS MODEL. BUILT AND DESIGNED BY CLAYTON THOMS. MANY HOURS OF ENJOYMENT IN RUNNING ON ELECTRIC OR STEAM. FULL DETAILS IN OUR 32 PAGE CATALOG. WITH SEVERAL OTHER TYPES OF R/C BOATS SEND St.00 FOR 3RD CLASS. OR $1.50 FOR 1ST CLASS. CUSTOM HAND MADE DIRECT ONL Y BY: DWIGHT HARTMAN.

2 ). 'J i. HeAtnm SPECIALIZED FIBREGLASS R/C PRODUCTS SINCE 1962 ARGENTA, ILLINOIS 6 2 5 0 1 PHONE 217 ■ 79S-2275

In summation, then, we have found the Starduster to be one of the most stable, forgiving free-flight designs on the market today. The tilted stab cou­ pled with its higher C.G. location seems to let it stall into lift more easily than a conventional design. Using Hot Stuff lets the airframe be The 1934 AERONCA C3 completed in less than three hours, ready 18" W in g sp an ...... 3.50 for covering. More than this you can’t The airplane had fool proof stability TYRO PLAYBOY SR. 80" SPAN making it an ideal instruction ship. ask. It’s so easy even an R/C fan can Old Timer R/C or F/F. Wing ribs, ply­ FOR FREE wood, pylon, and all curved parts milled. build one! (Now, was that nice, Jean? LNUT SCALE wen) · & C A T A L O G Formed wire gear. Stressed for R/C. Meets all O. T. requirements. SEE VOUR DEALER TODAY. IF UNAVAILABLE ORDER DIRECT. ADO 10% FOR POSTAGE & HANDLING OUTSIDE U S ADO 15% S39.95 Postpaid C ounter...... Continued from page 7 TCI?N A€RO CO., inc. TYRO MODEL & SUPPLY thick white creamy glue (which looks P.O. BOX 8B39B P. O. Box 11511, Palo Alto, Ca. 94306 like ordinary white glue, but don’t be CH ICAG O , ILL., ΒΟΒΒΘ Phone: 321-2898 fooled) dries clear, forming a strong, fle­ xible bond which is very resistant to shock and vibration. This product should .19 engines that are so popular with formed A.S.A. plastic pod, bonded to a put an end to loose canpoies forever. R/C 1/8 scale car drivers. The muffler, com­ fiberglass tailboom to produce a nearly 56 Adhesive can be used on ABS plastic, plete with mounting straps is available indestructible fuselage. The 625 square butyrate, and styrene foam. R/C 56 is from most hobby dealers or direct from inch wing spans 99-3/4 inches, yielding packaged in 4 ounce plastic squeeze bot­ Tatone Products, 1209 Geneva Ave., San a 15.7:1 aspect ratio. The 9% thick, tles with applicator spouts. Available Francisco, California 941 12. Retail price modified Eppler 385 airfoil is built with from your hobby dealer. For further is $7.95. standard D Tube construction, using * * * information contact Wilhoid Glues, Inc., spruce spars, sheeting leading edge, and 8707 Millergrove Drive, Santa FeSprings, With the introduction of the TRA vertical grain shear webs. The fuselage Calif. 90670. Quick Change T.D. Mount, 1/12 Scale comes sanded and sprayed with an epoxy * * * car racing buffs can now race in two primer that is compatible with most any BalIdrivers, from BWT Systems, 4523 classes with one car. This is a machined paint. The A.S.A. plastic can be glued Keeler Drive, Columbus, Ohio 43227, aluminum block motor mount which with nitro cellulose glues such as Am­ are ball-headed Allen wrenches which allows quick interchange between Class broid. allow tightening and loosening o f socket A Reed valve engines and Class B Tee- All wood components are machine screws from an angle. These handy tools, Dee engines in just minutes. No m odifi­ cut and sanded. The kit comes with all which are available with either a screw­ cation is necessary to the standard Jero- hardware, including Golden Rods, and a driver or “ L ” handle, are very handy for bee chassis. The mount attaches using blue tinted, vacuum formed canopy. The those hard-to-get-at engine mount screws, the standard chassis holes and the rear Albatross is a very deluxe kit, designed setscrews, or anywhere that socket head body post extender. This motor mount for the discriminating competition soar­ screws are used. BWT offers the Ball- will allow racing in two classes with ing enthusiast. Available direct from MH only minimal cost increase. The Quick Manufacturing for $69.95. drivers in 17 sizes from .028 to .500, * * * as well as metric sizes. The BWT Ball- Change T.D. mount is available from drivers are made of high quality alloy Thunder Road Automotive, 199 West Cal Aero-Model, 7142 Bluesails Ave., steel and are carefully heat-treated to First Street, Los Altos, California 94022. Huntington Beach, CA 92647, well withstand maximum torque. Price has not yet been announced. known for its line of .020 Replica kits of * * * * * * old timers, is now introducing the first Maximum noise reduction with min- The Albatross, from MH Manufactur­ kit o f a new series. inum RPM loss is what every R/C car ing, 2623 Honolulu Ave., Montrose, Designed for sport flying and econo­ racer looks for in a muffler. With Ta- California 9 1020, is an all-out compe­ mical operation, the “ Series 50” line tone's new expansion type tailpipe m uf­ tition sailplane for Standard class. De­ will consist of scaled down (to 50 inch fler, that is exactly what you get. The signed by Mark Levoe, it is the eleventh span) Old Timers for .09 to .15 engines cast aluminum muffler is specially de­ in a series o f clean, high aspect ratio and 3 channel R/C equipment. The first signed for use on the McCoy and Veco sailplanes. The Albatross uses a vacuum kit, now ready for delivery, is Sal Taibi’s

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 to have for dinner tonight, but at least you don’t have to wait until you get Rossi engine EXCLUSIVE U.S. DISTRIBUTOR home to find out how ... and what your batteries are doing. Another new Astro Flight product is 15/RC A the Astro 10 marine electric motor. It is designed for use in boats that would LIST PRICES: DEALER INQUIRIES require a .10 to .15 glow engine. The INVITED motor is housed in a molded plastic STANDARD ENGINE mount with flanges for bolt-down in­ 572.00 stallation in the boat. A four-bladed fan TUNED-PIPE ENGINE is mounted on the output shaft to pro­ 595.00 vide cooling normally supplied by an R/C ENGINE S83.95 aircraft propeller. The Dumas hardware kit H-7 contains all the parts needed for the boat drive train, and a Dumas M40-3 Bill’s miniature engines steel universal mates the drive adapter 1325 CAROL DRIVE, MEMPHIS, TENN. 38116 (901)397-0484 to the Astro motor shaft. A Dumas DV-20 boat has been used successfully with the power system. A LL NEW NEWLY MANUFACTURED A 12-volt rechargeable battery pack IGNITION 1/4 X 32 SPARK PLUGS is included with the Astro 10 Marine REMCO 29 motor. Total Price is $50. ENGINE Now you can once again run PRICE S42.50 your old ignition engines and * * * (engine only) join the Old Timer movement. Sonic-Tronics, who has long been Plus $1.25 $2.50 each, manufacturers of electric starters and for postage plus 50tí postage. other R/C accessories, is now manufac­ and insurance. turing a line o f glow plugs under the S51.00 Ignition coils, $6.00 trade name o f Glo-Dcvil, Long and short plus 50tí postage. Complete - reach versions are now being delivered with ignition in either the standard or idle-bar package (coil, Spark plug (not a "reject") equipped, R/C style, The idle bar plugs, condenser, plug, tie tack or lapel pin. A neat high tension lead). way to carry a "spare" I retail for $1.29 while the standard plugs Plus $1.25 for postage $5.00 plus 50 cents are $.98 each. Special 2 volt plugs will and insurance. List, 25 tí postage and handling. be available in the near future, as well as special Glo-Devil Racing plugs. These REMCO MFG. CO., P.O. Box 22414, Denver, Colorado 80222 will feature a special alloy space-age metal element which has never before been used in glow plugs. It is claimed famous 1938 Powerhouse. The kit fea­ to drilling and tapping engines for glow that the patented seal will withstand the tures pre-cut parts, formed landing gear, plugs, one can also use the tap for clean­ highest nitro content fuels and the nylon hinges and L.G. straps, full size ing up the existing threads in an engine highest R.P.M.’s. Yet, despite the special plans, and printed instructions. List head. features, these racing plugs will be only price is $31.50. To complete the picture, Semco also $1.29 each. For more information see MB’s editor had a hand in testing the offers a 1/4-32 adjustable die for $4.98, your dealer or contact Sonic-Tronics prototype of this series, and can verify which fits a standard 5/8 inch die stock, Inc., 2 South Sylvania Ave., Philadelphia, that it ’s a real joy to fly. We’ve indicated also available from Semco for $2.49. Penna., 19111. many limes in recent years that there’s This die is just the right size for cleaning Another new product from Sonic- no better trainer for the beginner in and deburring glow plug threads before Tronics is their Cheeter-Stik. This is a radio control than an inherently stable use in your cleaned up engine head! vinyl plastic “ engine flipper” that can * * * old timer free flight design. And by be fed to voracious props in lieu of reducing the original size down to the The newest item from Astro Flight fingers. The Cheeter-Stik is available in .09 to .15 range, you gain economy and Inc., 13377 Beach Ave., Venice, Ca. two sizes. . . a small one for the junior convenience of transportation. 90291, is an R/C system analyzer and modeler and small engines, and a large Cal Aero has discontinued production rapid charger, called the “ R/C System one for adult hands and large engines. of the 020 Replica series, but will con­ Analyzer Rapid Charger!" This unit, The tube which comes in contact with tinue to sell them as long as the present which retails for $38.00, is claimed to the prop is made o f a resilient vinyl stock lasts. eliminate the need for battery discharge material which will not damage propel­ * * * units, expanded scale voltmeters, and lers. Available in a choice of red, yellow, Semco Model Engineering, 14 Water quick chargers. or white handles, the large size sells for St., Waltham, Mass. 02154, manufac­ With this unit you can: $.99 and the small sells for $.79. Avail­ turers of an extensive line of glow engine Charge your receiver batteries in 15 able from your hobby dealer or direct mufflers, is adding some useful modeler’s minutes. from Sonic-Tronics. · tool to its products. Charge your transmitter batteries in Seven sizes of drill bits, either 6 or 15 minutes. Pit Pak...... Continued from page 21 12 inches long, are being offered by Test for a high resistance cell in two The Pit Pak is a most professional Semco. Available in 1/32 inch incre­ minutes. solution to a messy problem. It allows ments from 1/16 to 1/4 diameter, the Test for a shorted cell. the modeler to walk onto the field with prices are $2.98 and $4.50 each for Indicate the capacity remaining after his assembled plane in one hand and the the 6 and 12 inch lengths, respectively. a day’s flying in 10 minutes. Pit Pak in the other, knowing that he has A 1/4-32 tap and drill set is offered Measure the capacity of a fully everything he needs for an afternoon’s for $2.98. This is the thread size used charged battery in 10 minutes. flying (Transmitter? Yeah, well that too, for standard glow plugs, and in addition It will not tell you what you’re going if you’re an R/Cer!). We have found

84 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER that the Pit Pak can be slightly modi­ fied to be even more convenient. A machine screw and wing nut can be at­ tached to the lid o f the tool compart­ ment to allow carrying spare props on the outside o f the lid. Also, a small block o f styrofoam can be attached to the inside of the tool compartment lid. Holes cut into the foam can be used to store extra glow plugs. The only complaint about the Pit Pak is common to all available fuel pumps. We would like to see the slide toggle switch on the pump replaced with aspring loaded “ dead man” type switch. 19 to 25 Power Sport Pattern R/C

The pumps fill a tank so quickly that • Perform· like e .60 powered ship — Economical sue for lower cost and e. r All parts precision machined from premium grade materlats. it is no major inconvenience to stand t Self Jigging construction — No special tools or futures. by the pump while fueling the plane . . . and i t ’s much less expensive than for­ DELUXE HARDWARE PACKAGE INCLUDES getting the pump is running and pump­ Kraft Engine Mount Steering Arm ing fuel all over the ground. Canopy Pushrods Pre-Formed Gear Clevises We offer our congratulations to R/G’s Horns Hingos R/C for a well designed, well built ac­ Gear Retainers ... and many more! cessory that should find acceptance with ~ AIRTRORICS Quality Plu· Performance '* *·■·*·“ ‘••*>«•'•1 «·"«<· R/Cer’s everywhere. The Pit Pak is 200 Bannormon Avenue available from hobby dealers or direct 49 I. St. Joseph St. / P.O. Box 426/ Arcadia CA 91006 (213) 449-4600 Winnipeg. Manitoba $39.95. It is manufactured by R/G’s R/C, P.O. Box406, St. Joseph, Michigan, 49085. I CLOUDBUSTER RACE WINGS I P.S. Girls, the Pit Pak could be a nice Christmas gift for the man in your life! ·

R/C Champs .. Continued from page 19 same “ chopped rudder” design. It couldn’t roll axially, and dropped its nose coming out o f any rolling maneu­ Replicas ver. RUBBER SCALE PLANS FOR SIX (6 ) A | F i t / FREE FLIGHT Ivan Kristensen (7), Canada, did an FLIGHT-PROVEN, RARE & UNUSUAL l i L W iHARDWARE RACING PLANES: CROSBY. FLOYD 8 average flight that brought much de­ W inding BEAN, TWO FOLKERTS, SMIRNOFF Hooks. Etc. served applause, followed by Ben Cas­ BEARCAT, and CHAMBERMAID. taneda (43), Mexico, who short-changed Complete set, postpaid, only $4.00 For complete catalog and FREE us one point in the 8-point roll, and order from: Peanut Pilot send $1.00 to: finished his flight with 2 seconds on the CLOUDBUSTER VENTURE i_JIM CROCKET REPLICAS watch! P.O. Box 2921, Livonia, Mich. 48154 J1442 N. Fruit Ave„ Fresno, Ca. 93728 C Giuseppe Bertolozzi (13), Italy, was followed by Yves Van Gompel (50), might have been short, but the plane Ruggero Pasqualini (26), Italy, flew Belgium; then Isao Matsui (12), president sure as hell didn’t “ change heading in well but too close in, far exceeding the of I.M. Products o f Japan; Slávko Poli- the clim b” . . . for as long as it was in it! height and width angles. car (48), Yugoslavia; and Bruce Turner The rest o f the flight was very good, Paul Lagan (44), well known and (42), New Zealand, who was very likely though all rolling maneuvers were started versatile New Zealand modeler, put in a distracted by a helicopter which landed too late, resulting in their being o ff cen­ 4 to 5 average flight, though the height directly across from us during his inside ter. We believe he scored 4505 on this and closeness probably cost him one or loops. flight. two points per maneuver. Our third team member, Dave Brown The business of scores brings up an­ Last flier for the day, and the first (3) was next, and we chuckled to our­ other complaint about the “overtom- round at our site, was Andre Laffitte selves about his takeoff! During our puterized” scoring system. When final (31), of France, who averaged 6 to 7 on critique session in Heidelberg, we had results were tabulated, only the three our sheet. suggested that Dave, and the others, scores that counted (best 3 out o f 4) On Thursday morning, the fluores­ turn out of the takeoff as soon as pos­ were listed. Unless you took the oppor­ cent orange vinyl rain suit that we sible to avoid unnecessary downgrading tunity (if available) o f writing down bought in and for Lake Charles came from possible deviations during a long unofficial scores as they were posted, in handy . . . two days of rainy, cold, climb-out (FAI rulebook says maneuver you could not tell from the final tabu­ windey weather began with a light driz­ is completed when model turns 90 de­ lation which score was for which round. zle, as the second half o f the contestants grees out of flight path and says nothing Avery unfortunate and thoughtless omis­ flew Round 2 at our site. about how high this must be). On this sion . . . streamlining sometimes weakens Norbert Bertemes (55), Luxembourg, first official takeoff when Davewas about the structure . . . was the first one o ff, and it must have 5 feet o ff the deck, you’d have thought Gianfranco Terenzi (74), San Marino, been disconcerting to have the engine that Harold Goldklank had yelled followed Dave, and again, the babbling almost die every time the plane got 3/4 “ TO IN ” all the way from Brooklyn, o f the caller certainly must have been of the way through any outside looping because Dave stood his Phoenix on a distracting, as Terenzi had us running maneuver. wing tip and “toined!” The takeoff for cover. . . between writing zeros! Next was Norbert Matt (8), Liechten-

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 design (also known as the “ Las Vegas Hole Digger!” ); Harald Neckar (14), V VINTAGE E/C FLANS y ( West Germany, who had intermittant PLANES WORTH MODELING radio problems; Kenneth Flolm (26),

R / C MODELS WING SPAN PUN SHEETS PRICE Sweden; |an Van Vliet (36), Holland; and Ernst Totland (40), Norway. B-25H"MITCHELL" 71" 4 $ I 3.50 P U S T ÍC ENGINE COWLS...... PAIR $ 9.00 By now, the rain had stopped com­ pletely, and the wind had become calm, CONSOLIDATED PBY-5A 'CATALINA" 108" 4 $ 13.50 P U S T ÍC ENGINE COWLS...... PAIR $ 9.00 but the overcast was making it prema­ " GUN BLISTERS...... PAIR $ 6.00 turely dark. PIPER PA-8 "SKYCYCLE" 60” 3 $ 10 . 50 Hanno Prettner, who was next up, PUSTÍC CANOPY...... EACH $ 8 .5 0 took full advantage o f the relaxed wea­ ” ” P U S T ÍC ENGINE COWL...... EACH $ 7 . 5O ther, and put up an excellent flight. SEND 50 CENTS FOR CATALOG TODAY ! ! ADD $ 1 .0 0 POSTAGE PER PU N Because of the tabulation system, we DISTRIBUTED IN CANADA- DEALERS & DISTRIBUTORS WRITE­ don't know what his score was. It was RS SALES, 1027 CURKE SIDE ROAD, SID MORGAN,I3I 67 ORMOND all 8 ’s and 9's on our score sheet. LONDON, ONTARIO, N5Z 3B1 BELLEVIL L E , MICH , 1*8111 Charley Marincowitz (35), South Africa, followed with his profile-canopied Kaos. Wolfgang Matt was up next, but in­ terference on the monitor (27.045 mHz) ARE PEANUTS YOUR BAG?? forced him to switch turns with Benny Kjellgren (I I ), Sweden, who put his Mach WALT MOONEY OFFERS TWO OF ’EM NOW! I up for a nice flight, though a little too high on some maneuvers. Matt (1) fol- Continued at bottom of next page PLANS BAG # I - PLANS BAG *2 , STATEMENT OF OWNERSHIP r 14 PEANUTS PLUS 2 OTHERS 14 PEANUTS PLUS STAHLWERK MANAGEMENT AND CIRCULATION ORO-HUME 0 H 7 · FOKKER V -23 VP-2 · S.E.5 · MICROPLANO VELOZ (Act of August 12, 1970: Section 3685, MEYERS O.T.W. . LAIRD LC-DE f o r d f l iv v e r · s p e e d s p it f ir e Title 39, United States Code) PHAl Z PHOKKER . SLINGSBY DART MILES M-5 SPARROWHAWK · DH-6 1. Date of Filing: October 1, 1975. 2. Title of Publication: The MODEL PIPER VAGABOND · GEE BEE D WACO SRE · RENARO R-17 BUILDER MAGAZINE. PILATUS PORTER· ANDREASON BA-4B BUCKER JUNGMANN · CULVER DART 3. Frequency of Issue: Monthly. DH-6 · DRUINE TURBULENT WHITMAN'S VW POWERED RACER 4. Location of known office of publication HUNlNGTON H-12 · MISTER MULLIGAN STAHLWERK MK R-IIIB · MONOCOUPE 110 (street, city, county, state, zip code): 1105 PIPER PAWNEE ANO PIPER COLT FOSTER WICKNER WICO G M -I · > Spurgeon, Santa Ana, Ca. 92702. 5. Location of the headquarters or general business offices of the publishers (not print­ ONLY »5.00 EACH (POSTPAID) FROM: WALT MOONEY ers): 1105 Spurgeon, Santa Ana, Ca. 92702. 6. Names and addresses of Publisher, 2912 CABRILLO MESA, SAN DIEGO, CA.* 92123 U.S.A. Editor, and Managing Editor: Publisher: W. C. Northrop, Jr. 1105 Spur­ geon, Santa Ana, Ca. 92702. stein, Wolfgang’s brother, who obviously member from West Germany; Ole Har­ Editor: W. C. Northrop, Jr., 1105 Spur­ learned something from hanging around der (64), Denmark; John Beasley (65), geon, Santa Ana, Ca. 92702. Managing Editor: NONE. with the new World Champion. Ireland; Hub Dekkers (51), Holland; and 7. Owner: Wm. C. Northrop, Jr. and A. Paul Behm (57), Luxembourg, ave­ Rene Schumacher (22), Switzerland, Northrop, 1105 Spurgeon, Santa Ana, Ca. 92702. raged 4 to 5. who, being a “ home-town boy” some­ 8. Known bondholders, mortgagees and Ferdinand Schaden (23), Austria, was how arranged to have the rain stopped! other security holders owning or holding 1 per­ Again the language lesson. The “ Vrille” cent or more of total amount of bonds, mort­ o ff the form that earned him 8lh place gages o r o th e r securities: N O N E . in Doylestown. He also, at least in this was the last maneuver before going into 11. Extent and Nature of Circulation: the Rectangular Approach! A ctual flight, seemed to have obvious radio Average no. copies problems during takeoff and landing . . . Four fliers: Howard Menary (73), no. copies o f single each issue issue only. Very odd. Incidentally, his caller Ireland; Milan Merse (68), Yugoslavia; during published announced what sounded like “ Cylinder Denis O’Hara (58), Ireland; and Branko preceding nearest to Hote” for one maneuver. It followed Policar (54), Yugoslavia, managed to fly 12 m onths filing date A. Total No. Copies Printed Three Rolls . . . in case you need help. in the calm of Schumacher’s magic with (Net Press Run) 32,050 34,600 Bengt Lundstroem (23), Sweden, the weather. But then, the clouds opened B. Paid Circulation showed us the best takeoff so far, but up a downpour for Guy Hardy (21), of 1. Sales thru Dealers and France, who did extremely well consider­ Carriers, Street Vendors dropped to a 6-7 average for the rest. and Counter Sales 22,165 23,610 ing the drenching and the full scale heli­ Bob Hurst (61), Australia, gave us 2. Mail Subscriptions 8.470 9,485 copter activity directly across the run­ 4 spins! C. Total Paid Circulation 30,635 33,095 way. Finally, during the approach, his Ivan Olivier (49), South Africa, had D. Free Distribution by Mail, transmitter refused to work under water, Carrier or Other Means. the misfortune of flying in a teaming and he crashed. We need something in Samples, Complimentary downpour. He should have been allowed and Other Free Copies: 760 840 the rules to help the contest directors to stop. We judged by extrapolation E. Total Distribution decide when enough’s enough... Perhaps from under the Pepsi umbrella! (Sum of C and D) 31,395 33,935 they should be made to stand in the rain Konrad Weixelbaumer (29), Austria, F. Copies not distributed without protection while they're making 1. O ffic e use, le ft over. averaged about 7 in diminishing rain, the decision. Unaccounted. Spoiled and stopped his landing roll at exactly ]an Van Beek (47), Holland, flew in after Printing 415 405 10 minutes on Willy Boni’s stopwatch the heavy rain, and thunder, but finally 2. Returns from (He was the time keeper on our line . . . New Agents 240 260 the contest was stopped, and he was G. Total (Sum of E & F — Should equal from Urdorf, Switzerland). given a reflight a little while later, fol­ net press run shown )ohn Lysaght (46), Australia, was lowing another reflight by Guy Hardy, in A): 32,050 34,600 followed by Wieland Meier (30), Liech­ and scheduled flights by Graham Smith- I certify that the statements made by me tenstein; then Terry Cooper (33), Eng­ son (53), New Zealand; Mike Bone (39), above are correct and complete. land; Gunter Hoppe (10), perennial team England, flying Mike Birch’s Capricorn Wm. C. NORTHROP, Jr. Publisher.

86 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER CLASSIFIED ADS INDEX TO ADVERTISERS Non-commercial: Rate is 25 cents per word with a minimum of $3.00 worth. Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No mail-order discount house ads knowingly accepted. Ace R /C In c ...... 3rd Cover All ads are payable in advance and may be for any consecutive insertion period A ir t r o n ic s ...... 85 specified. Name and address free. Send ad and payment to: The MODEL BUILDER. Classified Ads, 1105 Spurgeon, Box 4336, Santa Ana, California 92702 A m erican Balsa C o rp ...... 73 Astro Flight Inc ...... 82 Bantam M odel P r o d u c ts ...... 62 ATTENTION SERIOUS 1/2A FLYERS! If ROSIE’S RC is alive and well and living in you need the extra power an .049 or .051 Houston, Texas. Prop Reamers (THE BEST) B ill's M in ia tu re Engines ...... 84 can give you, try a highly modified KIRN- 5/16” or 3/8" $9.95. Carb-Adapters (Fit Cannon Electronics ...... 64 COX Tee Dee engine, available in several Fox 40, 45, 60, Eagle, Hawk, 74,75) $5.95, Carr S a ils ...... 54 configurations. . . including RC versions. Ma­ w/Perry Carb. $21.90. Add 50Plymouth, Michigan 481 70. 100%. Offering assortment of engine screws Shamrock Competition Im ports ...... 63 which are replacements for those used on What is Always Needed and Never in Supply? Sig M fg. C o...... 7 th Cover such oldies as O8 1 R, Orwick, McCoy, Wasp, Screws, nuts, washers! Offering an assort­ S o n ic -T ro n ic s ...... Fox, Hassad, etc. Fillister head, Phillips ment of 2-56, 3-48, 440, 6-32 screws, nuts, 6 6 single slot: 2-56, 3-48, 4-40, 4-48, 5-40, washers of various lengths and heads. All Sterling M odels ...... 59 6-32. 600 pieces $10.00;1000 pieces $15.00. suitable for model airplane, car, boat con­ Su-Pr-Line P ro d u c ts ...... 79 Postage $1.00, - foreign, $2.00. Satisfaction struction. Over 1200 pieces. Worth $20.00. Tern A e r o ...... 83 guaranteed or money refunded. Chuck Bar- Special $8.95+$1.00 postage - foreign $2.00. tunek, 5051 Cartagena Cir., La Palma, Refund if not satisfied. Chuck Bartunek, Top Flite M odels ...... 61 CA 90 623. 5051 Cartagena Cir., La Palma, CA 90623. Tyro Model & Supply ...... 83 VL Products ...... 6 8 Victor Model Products ...... 76 Continued from previous page until the next morning, but Chris Sweat- Vortex Model Engineering ...... 77 lowed, and again, we don’t know which man (33), South Africa went up, and Peter Westburg ...... 79 we had to kneel down in order to see score it was, but it did not seem quite W illiam s B ros...... 81 as good as Prettner’s moments before. the model against the sky as it all but In the fast-descending dark, Keith disappeared when below the horizon. Maundrell (32), England chose to wait Chris’ model was copied in profile from

NOVEMBER 1975 WHEN CONTACTING ADVERTISERS’ TELL ’EM MODEL BUILDER SENT YOU! 87 FULL-SIZE PLANS No. 9751 BABY ALBATROSS $8.00 No. 775-O.T. BOMBSHELL $4.00 Exact R/C scale model of famous Bowlus Famous w in n e r o f Class C gas at the '4 0 SERVICE sailplane. Span 122". Col. Bob Thacker. Nats, by Joe Konefes. Phil Bernhardt. (with instructions) No. 9752 FIREDRAKE $3.00 No. 6751 SQUARE HARE R/C $3.00 Half-A free flight featuring fast climb, All sheet balsa trainer with long history. No. 11751 NAVY FLYING BOAT $6.00 flat glide, penetration. Larry Sicuranza. Span 52", .19 power. By Bill Northrop. "Composite" scale R/C flying boat bi­ No. 975-O.T. PURSUITEER $4.00 No. 6752 SKYFARER S2.75 plane, 6 ft. span. 40-61. George Clapp. Smart looking 1938 Pete Bowers design. Rubber powered 1" scale model of trike Span 60", area 575. By Phil Bernhardt. geared high wing cabin. By Earl Stahl. No. 11752 "TWIRP" 50.75 Beginner's fuselage rubber powered ship. No. 6753 SHRIKE S3.00 No. 8751 SOPWITH TABLOID $4.00 Teaches stick 'n' tissue. By Dave Gibson. Hot Half-A free flight, with good looks, Sport Scale WW I biplane for 3-channel and top performance. Bill Langenberg. radio. Span 42", .19 eng. By Chris Moes. No. 11753 "LUNAR-TIC" $3.00 No. 675-O.T. DIAMOND DEMON S2.50 Classic-looking, high performance Half-A No. 8752 VOLKSPLANE $1.50 free flight. Easy to build. Harry Murphy, Great performing rubber powered profile Popular .020 Replica of Bay Ridge cabin scale. Span 24". By John Oldenkamp. Cl. B job. Span 34". By Phil 8ernhardt. No. 1175-O.T. FOO 2-U-2 $2.50 A pre-Zipper design by Dick Obarski, re­ NO. 8753 F R IT Z , H LG $1.00 No. 5751 FLEET BIPLANE S4.00 duced to .020 Replica, by Ron Sharpton. A pylon style, high performance HLG, Fast-building 2” Sport Scale R/C model with DT system. Different! Jim Parker. of famous 1930 bipe. By Romey Bukolt.

No. 10751 THE LITTLE ONE 54.00 No. 875-O.T.'38 MOFFETT CHAMP $3.00 Economy size, .40 powered pattern ship Canadian Roy Nelder's beautiful rubber Price includes 3rd Class postage and reprint has rolled ply fuselage. By Dick Sarpolus. ship. A real classic. By Phil Bernhardt. of building instructions (if any). Add 45(ř PER PLAN for 1st Class postage. Add 504 No. 7751 LITTLE BOMB $2.50 No. 10752 MI5TER MULLIGAN 54.50 for overseas orders (except APO's). Jumbo scale rubber model of famous Ben Minimum area 1/2A pylon racer for two Howard racer, spans 56". Tom Houle. channel radio. By Ulm. R. Nielsen, Jr. Send self-addressed, stamped business size envelope for free copy of complete plans list. No. 10753 5UPER PUP $2.50 No. 7752 THE ALIEN $2.50 CALIFORNIA RESIDENTS ADD 6% TAX. Profile C/L stunt ship for .29 to .36 pow­ Pendulum controlled flying wing pusher er, 42" span. Easy-built. Mike Parenteau. for Brown COj power. Daniel Walton. S EN D TO : MODEL BUILDER PLANS SERVICE No. 1075-O.T. 5KYLARK 53.50 No. 7753 ULTRA DART $2.00 Pleasing Class A/B Louis Garami design. Monster 39" span Delta Dart for sport 1105 SPURGEON, BOX 4336, Shoulder wing, 50" span. Phil Bernhardt. and Unlimited Rubber. Dave Linstrum. SANTA ANA, CALIFORNIA 92702 the Midget Mustang, but used trike gear. the judges and said "Good Morning, We gave him all 8 ’s and 9 ’s, and in An interesting design. He took advan­ Sirs,” then flew well in spite o f the many cases, we have to admit to holding tage of the option to refly in the morning. gusty wind and an engine that was mis­ back a little for fear of having our score Neither pilot nor judge could properly sing badly throughout the flight. dropped (We’ve already expressed our see an airplane that was only a sil­ Dave Brown’s Phoenix showed its feelings about this procedure, but the houette in the sky. ability to penetrate, as he put up a siring Swiss came up with one b e tte r. . . or On Friday morning, we had 6 flyers o f 8 point maneuvers (on our card) dur­ worse . . . Anyway, the high and low to finish up from Round 2, including ing a very windy spell. scores o f each maneuver were dropped, Sweatman’s refly. First up was Keith Terenzi, of San Marino, was all over not the high and low totals. More on that Maundrell, followed by Sweatman, then the sky, repeating his many zeros o f another time). We were absolutely dum- Denis Chabert (37), France; Naphtali the day, but in the wind, even more founded later to find out that his average Harowitz (70), Israel, who gave us 4 spectacular. In trying to land, he did a score was some 240 points lower than outside loops; Erik Toft (52), Denmark; "bounce-and-go,” went around, and ma­ what we had recorded! and Kurt Matke (15), West Germany. naged to get his ship down in one piece, After lunch, we again saw Prettner Beginning with Round 3, we would amidst a huge round of applause . . . and Matt, who were flying only two apart start our second look at each of the con­ from judges as well as spectators. . . (What a spot for poor Charley Marin- testants, this time in cold, windy wea­ we were all glad to see him down! cowitz, of South Africa, to have to fly ther, with rain threatening . . . Hutchin­ After lunch, the wind continued, and . . . between the two top fliers in the son, Kansas, was beginning to look bet­ so did the flying. The velocity exceeded world!). Prettner’s flight seemed unin- ter all the time! Hutchinson at times. Mark Radcliff put pired. He lost heading several times and Without mentioning every flier for up an excellent flight. We gave him a drew several 7 ’s (on our card). M att’s the second time, we’ll pick out some 9 on the Slow Roll, but his Running Three Rolls were perfect, and he added interesting points from our notes on Eight blew downwind, losing symmetry. 8 ’s and 9 ’s for the rest o f his flight. each flight (We jotted these down on The rains came again and it poured In summary, the top ten fliers were; the flight schedules, between maneuvers). on and o ff the rest of the day. Matt (Wolfgang), Prettner, Brown, Yo- Ben Castaneda continued our lan- Saturday morning we were on the line shioka, Okumura, Radcliff, Kristensen, gauge lessons with "Ocho Corrido” and the first flier took o ff at 0710! We Mat (Norbert), Miller, and Hoppe. The (Running Eight to you gringos!). were going to get four rounds come top five teams were; USA, Liechten­ Bertolani almost clobbered a circling hell or high water (plenty o f the latter!). stein, Japan, W. Germany, and Austria. (in a thermal) hawk in the Figure M If ever there was a case of question­ Because o f space limitations, we will and then just missed a full size chopper able judging, it had to be on Rhett have to continue this report next month. which landed across the way, during the Miller's flight, which was the second We would like to comment on particular Running Eight. of the morning. He and two others had maneuvers that were most consistently Garry Reusch did a perfect tail slide to finish up Round 3 before we got into goofed. In some cases this was because when his ship refused to kick over into Round 4. At approximately 0720, when of their level o f difficulty, but in others a stall turn during the Figure M. He he flew, the sky was clear and the air it was simply a matter of attending to landed after the loops with apparent was dead still. There was no way we details. We’ll also comment on rules and radio problems. could fault his takeoff and gave him judging procedures Hopefully, some of By 11;00 AM it had gotten real win­ a 10. The rest of his maneuvers were as it will benefit pattern fliers who take dy, with the sun coming in and out. close to perfect as any I had yet seen, the sport seriously. Isao Matsui good-naturedly bowed to including those o f Matt and Prettner. See you in “ Remotely Speaking..

88 MODEL BUILDER IN THE BEST CIRCLES, ITS II toer skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

• Safe, Rear Draw-Bar Clutch Available in seven anodized handle colors: silver, blue, red, green, gold, copper, violet. • Precision, Instrument-Quality Materials Complete set in fitted hardwood case; includes • Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing • Non-Rolling Hex Cross-Section six No. 11, six No. 15, one No. 12, and one • Deeply Knurled, Non-Slip Grip No. 20 ... A total of 14 blades $12.95 Individual handles (specify color) $5.10 • Long-Life, Stainless, Vial of 6 blades (No. 10, 11, 12. 15, Surgical Steel Blades or 20) $2.10 20

See your dealer, or order direct. £ Dealer inquiries are invited. MODEL BUILDER PRODUCTS All direct orders sent postpaid in U.S. California residents add 6% sales tax. 1105 Spurgeon, Box 4336, Santa Ana, California 92702 Quality

'Μ m i

THE KAVAN STARTER USES A LOW CURRENT DRAIN, HIGH SPEED MOTOR WITH A 5 TO 1 GEAR REDUCTION VIA PLANETARY GEAR FOR MORE STARTING POWER. ADAPTERS AVAILABLE FOR STARTING WITHOUT A SPINNER FOR CARS AND BOATS AND ALSO DRILL CHUCK

AVAILABLE AT BETTER DEALERS EVERYWHERE OR ORDER DIRECT DEALERS SEE YOUR KAVAN DISTRIBUTORS

FIBRE FILLED PROP GLOW PLUG PRESSURE CARBURETOR

HOLDS SHAPE AND PITCH FOR MORE THRUST DOES NOT “WHIP" BETTER ACCELERATION IN LOW AND HIGH SPEED UNIQUE DESIGN ELIMINATES NEED FOR IDLE BAR, 5 HEAT BLIND MOUNTING NUT RANGES FOR HIGH OR LOW NITRO FUEL IDLE FEATURE ψ Ό

MACHINED FOR SUPER STRENGTH NOT STAMPED

> BALL LINK

WILL NOT “ POP OUT", FOR HAS SPECIAL MACHINED USE WHERE PERFECT PIN WITH SHOULDER SPECIAL COMPOUND ALIGNMENT OF PUSHROD FREE MOVEMENT WILL FOR HIGH PUNCTURE IS NOT POSSIBLE NOT SQUEEZE CONTROL AND KINK RESISTANCE HORN

MODEL AIRCRAFT INC., 1424 E. BORCHARD AVE., SANTA ANA, CALIF. 92705 TELEPHONE 714-8 35-77 88 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! KADET KOMMENTS Our little boxy buddy continues to make its mark in the modeling world. The Prop Snappers R /C of Port­ land, Maine honored it June 22nd with an All-Kadet contest, directed by Art Everett, club president. The photo at top left shows a lineup of 20 Kadets in the pit area. Events were held for fast-slow fly by, bomb drop, touch and go and spot landing. Bill Holt is shown at left making a last minute correction as he heads for the spot. The hand-rubbed paint job displayed by Bob Smith (below, left) won the Best Finish award at the meet. Note how these fliers have added variety to the appearance of their models with different shaped cabin windows, tied into the color markings. Since the Kadet has become the standard RC trainer for novices, it gets mentioned frequendy in club news­ letters. Here are a few samples: ISTHMIAN MODELAIRE (Panama Canal Zone) “Don Wangberg, the ex-Ukie flier, finally made it out to the field with his Sig Kadet. This plane is some­ thing else. You'd never guess it was such a big plane but it is and with rudder only flies like it’s a full house. Don had a little problem at first but fourth or fifth time got the hang of it and will be one of the clubs experts very soon." DC/RC NEWSLETTER (Washington. D.C.) "George Pickrell has been working so hard building planes for Maynard Hill (and JHU) that he’s down to one old beat-up Sig Kadet. George claims that plane is more fun than any high-powered pattern ship with retracts. He may be right because on one windy day he was flying while everyone else was afraid of the crosswind. ” George has a good point there. We find a lot of people who are expert pilots fly the Kadet for the simple rea­ son that its a lot of fun. Robert Vedell of Middletown, N.Y. has had interest­ ^SIG5t ing experiences with his .35 powered Kadet. On his very first flight he throttled back 1/4 throttle or lower KIT RC-31 and cruised sedately around for 55 minutes on the standard 6 ounce tank. How’s that for fuel economy? Bob says, “In the area of stability, this plane rates an * 2 9 .5 0 A+. Many other members of the club have flown my Kadet and all they can say is - Beautiful, A pussy cat!” LENGTH: 42- Although we originally intended the Kadet for smal­ ler engines, so many builders have been installing .35’s WING SPAN: 57- that we have decided the customer is always right. WEIGHT: 4 Lbs. Kadets now in production are up-rated to a .35 engine ENGINES: .19-.35 size recommendation. They feature beefed up wing spars, a larger firewall doubler and heavy-duty alumi­ FOR USE WITH num engine mounts. Be a square, join the unspeedy. Build a Kadet for 1 TO 3 CHANNEL learning or just living it up. (P.S. Let’s have some RADIO EQUIPMENT pictures of your version. Send to Klaude at Sig.) Designed by: Claude McCullough

THE IDEAL RC TRAINER A believe-it-or-not from Eric Wicklund, Mountlake SI6 KADET Terrace, Washington. Even the kit box flies good! See your dealer first. To order direct add $1.00 postage in the U.S., $1.50 in Canada. No C.O.D. orders. PLACE YOUR ORDER FOR SIG’S LATEST COMPLETE CATALOG - OVER 260 PAGES - $1.50 POSTPAID Sig Manufacturing Co., Inc. . . Montezuma9 Iowa 50171 Cornucopia of Power Variety is the spice of life, particularly for against the best. Within this cornucopia of power is modelers— they build and fly aircraft of every size and your next engine! application; pattern, racing or scale. They operate Sport flyers will like MRC/Enya's traditional easy helicopters, boats and cars; imagination seems their starting, low vibration and long life. Throttle valve types only limitation. provide ultra reliable idle that is easy to set up. The To meet this infinite variety of need, MRC/Enya throttle also provides smooth transition from idle to im­ builds superb power plants that range from the pee- pressive power levels that can match any competition wee .09 III through the newest Enyas— .40 and .45 II requirement. that meet today’s need for engines that can handle full All MRC/Enya engines feature design, metallurgy size airplanes with reduced fuel consumption— to the and construction commensurate with their intended brutish .60 III B that helped make Tsugutaka Yoshioka, application, insuring longevity, reliability and your satis­ the reigning World Champion. Enya has proven itself faction where it counts— in the air, on the road or pond! MODEL RECTIFIER CORPORATION · 2500 WOODBRIDGE AVENUE · EDISON, NEW JERSEY 08817