FEBRUARY 1976

volume 6, number 50 il!JLi·L11 M i l 'J5P THE MOSTLINER/CCOMPLETETHEOFAVAILABLESAILPLANES &ACCESSORIES c T N For Additional Info Write Info Additional For N T c 36” Span 250 Sq. In. 16-20 oz. 16-20 In. Sq. 250 Span 36” $ 1 S. In. Sq. 810 04 oz. 40-44 Span 99.9” 34.95 2 Sa 49 q I. 62 oz. 16-20 In. Sq. 409 Span 62” ulLn O ohos Cue, aois etc. Canopies, Chutes, Towhooks, Of Line Full ISAD CESR TM O H ICRIG MODELERDISCERNINGTHE FOR ITEMS ACCESSORY AND KITS

.. o 66 Acda Cl 91106 Cal. Arcadia, 626, Box *.0. AIRTR0NICS LS EIS ISFR O OTAD IH VALUE HIGHAND COST LOWFOR KITS SERIESPLUS AQUILA rCl 23 445-4600 (213) Call or w o Promn Sot oe hp rm h PgsO RCM PagesOf The FromShips Power Performing Sport Top Two QUALITY PLUS PERFORMANCE PLUS QUALITY QUESTOR Standard opee ih 0 foot 100 with Complete Heavy Duty Heavy eind y o Dwy Le Renaud Lee & Dewey Don By Designed AUNCH PAIL H C N U LA of surgical tubing, surgical of monofilament line monofilament and all hardware. all and IH STARTS HIGH ls $79.95 S59.95 Glass Std. $34.95 length $36.95 ult rcso ahndprsas£^ . Z ^~ s\£ a machined quality parts precision io ctig n pushrod and hardware. cutting minor n u ohr is Vr sml to simple build and easy Verysometo Requires fly. kits. other our in high same the include kits These oh is nld pinl Spoilers Optional Include Kits Both h H Promne Compacts” Performance Hi The

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Flight from theAtlantic Ocean to the Pacific by the Sr. Falcon “LIBERTY BELL” It was the toughest test ever devised for man, woman and R/C model airplane. Bob and Doris Rich wanted to fly a model from the Atlantic Ocean to the Pacific, a distance of 3,000 miles. Three THOUSAND miles. They would never know where the ship might have to land, or where it would have to take off. In only 2 months, they sought and obtained support from many members of the model industry, and the cooperation of the Academy of Model Aeronautics, completed their detailed plans for the project, built 4 Sr. Falcons, flight-tested 2 of them, and had everything in readiness well ahead of the take-off they had scheduled for October 1,1975. Promptly at 10:02 AM that day, the beautiful "Liberty Bell" lifted 32 oz. of fuel off the memorable earth of Kitty Hawk, North Carolina, on the shores of the Atlantic, and headed towards Raleigh, capital of the state. Many adventures and 120 landings later, on October 29. she circled and soared and dipped over the sunny afternoon waters of the Pacific at Oceanside, Calif. The great project was now an historic and successful fact. The next day, Liberty Bell made her last flight, a ceremonial demonstration outside the Museum of Science and Industry in Los Angeles, where she was to be displayed for several weeks. Many dignitaries were there to offer greetings and congratulations to the Riches and their hard-working crew — Ed Sweeney of Reno, and Bob Sutalski of Chicago. Included among the dignitaries was one of America's authentic heroes, General Jimmy Doolittle. With the completion of this first transcontinental flight, R/C Modeling has gained added stature. To Bob and Doris, the people of Carl Goldberg Models offer our heartfelt congratulations, too. You've proved again that with hard work and magnificent planning, a big dream can come true. Carl Goldberg

Bob and Doris Rich, Johnny Clemens, l Pres, of AM A in the middle, at Dallas with the LIBERTY BELL.

4734 WEST CHICAGO AVENUE · CHICAGO, ILLINOIS 60651

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 1 1=

WE ARE LAYING IT ON THE LINE

We believe our new .61 R/C engine to be the world's best. There are many factors behind this statement. Greater useable power is one. Power where it counts, pulling power, brute torque, and constant speed produce effortless smooth flight performance. Another reason is excellent non-critical fuel draw. The mixture setting remains constant from flight beginning to end without resorting to complicated pumps or pressure systems. Cost per flight is important to many and the Kraft .61 is a long life engine performing willingly hour after hour. Also important and so often overlooked are fast service and ready parts availability. These factors are assured by our long term reputation in the R/C field. The outstanding performance of the new Kraft .61 has been amply demonstrated in recent contests. It was used by 5 out of the top 10 finalists in Class D Expert at the U.S. Nationals. In the highly competitive Las Vegas Tournament of Champions, it was selected by 11 out of 23 contestants (over twice as many as any other engine). At the large Tucson Winter Nationals, it took first and second place, and 5 out of the top 10. You can count on our engine because we take pride in it and in ensuring your satisfaction with our products.

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450 WEST CALIFORNIA AVENUE RO. BOX 1268-VISTA,CALIFORNIA 92083 World's Largest Manufacturer of Proportional R/C Equipment MODELS 'Δ Δy t s E 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 fo r published designs w ill be at our regular rates. A ny prizes awarded do not represent an agreement to publish any design. 6. Entries w ill 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 be entered i f significant modi­ 7. Postage must be furnished if return of sub­ fications have been made to the stock kit. m itted entries is desired. 2. Do not send the actual model. Send only black 8. Deadline for entries in the first contest o f 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 will 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 month’s winner is W A LT WIN- BERG , from Richmond, B.C., Canada. His entry is a 75 inch span, original design biplane, powered by compressed air. The 5-cylinder rotary engine turns a 20 inch propeller, and each cylinder has a 1/2 inch bore and 1/2 inch stroke. The engine is believed to be a Knepper design, built in Portland, Oregon, around 1930. Believe it or not, total weight of the model is only 16-1/2 ounces! By comparison, a modern R/C biplane of the same span, usually weighs about 10 pounds. 4 FEBRUARY MODEL 0 1976

BUILDER volume 6, number 50

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

STAFF CONTENTS

EDITOR FEATURES Wm. C. Northrop, Jr.

GENERAL MANAGER WORKBENCH, B ill N o r th ro p ...... 6 Anita Northrop OVER THE COUNTER,Taylor C o llin s ...... 7 EDITORIAL ASSISTANT Le Gray FOR MS. ONLY, Char Rohring ...... 10

ASST. GEN. MANAGER REMOTELY SPEAKING, Bill N o r th ro p ...... 16 Dawn Garrott CHOPPE R C H A TTER, Jo h n T u c k e r ...... 20 ART DIRECTOR Paul Plccan PROD UCT? IN U$E, B ill N o r th r o p ...... 23 SECRETARY R/C SO ARIN G , Taylor C o llin s ...... 28 L. Gordon

SUBSCRIPTION MANAGER “ IS SOARING FOR THE BIRDS?”, Jim G r a y ...... 30 A. Valcarsel STRICTLY SAIL, Rod C a r r ...... 31

CONTROL LINE, Dan Rutherford ...... 36 CONTRIBUTORS F/F SCALE, Fernando R a m o s ...... 44 Rod Carr Fernando Ramos Chuck Hallum Char Rohring HANNAN’S HANGAR, B ill H a n n a n ...... 46

Bill Hannan Dan Rutherford FREE FLIGHT, Bob S t a lic k ...... 50 Walt Mooney Bob Stalick “PACIFIER” F/F FUEL SYSTEM, B ill H u n t e r ...... 54 John Pond John Tucker PRODUCT? IN U?E, Taylor Collins ...... 55

ADVERTISING REPRESENTATIVES PLUG SPARKS, Jo h n P o n d ...... 56 W EST: Bob Upton, 20626 Clarendon Ave. Woodland Hills, California 91364 (213) 884-2294 SCALE VIEWS EA S T : Walt Moucha, 38 Coppersmith Rd., Levittown, New York 11756 CURTISS FALCON, Peter Westburg ...... 25 (516) 796-4898

JA P A N : World Media, Inc., Eiji Noguchi, Director, Chinatown Bldg. 202, Yamashita-cho Naka-ku, Yokoha­ CONSTRUCTION ma (231), Japan. Tel (045) 662-8128. Cable W OM EDIAC. DRAGONFLY, Tex Newm an 11

Subscriptions $15.00 per year, $27.50 for “KILLER” SAUCER, Howard "C ra s h " E v a n s o n ...... 35 two years. Single copies $1.50. Add $2.00 for postage per year outside of U.S. (Except AMERICAN EAGLE "EAGLET”, Tom L a u r ie ...... 38 APO). Add 75 cents for Canada and Mexico. PEANUT LANIER PARAPLANE COMMUTER, Don B r o w n ...... 47 Copyright 1976 by MODEL BUILDER Magazine. All rights reserved. Reproduc­ LONG CABIN O.T., Phil Bernhardt...... 58 tion without permission prohibited. Published monthly by M OD EL B U IL D E R Magazine, 1105 Spurgeon, 8ox 4336, Santa Ana, Calif. 92702. Phone (714) 547-3963. Change of address notices must be received Cover: Very appropriate for observation of our Bicentennial year, the plane on the cover is called the American Eagle "Eaglet." Produced from 1928 to 1931, the little "Eaglet" one month before date of issue that new could be purchased for $250 down and the remainder financed over 24 months. This 48 address takes effect. Send old address with inch span model of the "Eaglet," scaled and built by Tom Laurie, is free flight with elec­ new; old label preferred. Post Office will not tric power. Further details, and a construction article, begin on page 38. Ektachrome forward copies unless you pay extra postage. transparency by Taylor Collins. Duplicate issues cannot be sent. Second Class postage paid at Santa Ana, Ca.

FEBRUARY 1976 5 "Yes, Mother, I really went to Switzerland!" Picture was taken and sent to us by a friend from Japan whose name we can't remember. He's a photographer for the Japanese magazine "R/C Technique." (I to r): Judges Tony Aarts (Holland), WCN (USA ), Camille Gerard (Luxembourg), Egon Gstohl (Liechtenstein), Pierre Pignot (France), and CIAM President Sandy Pimenoff, Finland. f r o m B · / / w o r k b e n c h · · ·

• You might as well get used to seeing short of encouraging, in that we agreed inches) and in thicknesses of 1,1.5, 2.5, and hearing the word " A L L S A ” . It’s that it would be nice to have a cheap and 3 millimeters. apt to be the main subject of conversa­ and available substitute for balsa . . . First quantities will be 6 to 8 pounds tion among modelers for some time to just like it would be nice to have that per cubic foot. Others (3, 12 and 16 come, and not without justification. oft-mentioned 60 miles-to-the-gallon car­ will be color coded in a light tint for To get right into it without further buretor, the anti-gravity personal flying identification! small talk, A L L S A is the name of a pro­ belt, and perpetual motion. Sure it’s a Eventually, there will be a choice of posed, space-age substitute for balsa. If great idea, but so what? grain characteristics, but first produc­ you think we’re “ leg pulling” at this Then, just a few days ago, about the tion will be equivalent to uniform quar­ point, forget it. the first of the year, we received Dave's ter-grain balsa. A special patent-applied- Dave Jones, Vice President of Envoy reply (Yes, he was still polite!). This for process creates the strength patterns Corporation, Phoenix, Arizona (no, they time, in addition to a personal note as­ that are normally associated with balsa. don’t make under-water lockers) is a suring us that this whole situation is a All of the usual finishing materials modeler, who may be remembered by very 'solid and serious effort, Dave in­ and adhesives will work in the normal some as having campaigned rather heav­ cluded more definitive information a- way. ily just a few years ago for a "pilot in bout A L LS A . We summarize it as fol­ It will cut and sand like balsa, ex­ every scale model cockpit.” lows, and leave it up to you whether or cept that chipping and splitting chara­ Late last year, Dave sent us a form not to get excited. cteristics will be much improved. letter, introducing “ A L L S A ” , and ask­ It will be available in late 1976. There you have the basic informa­ ing us what we thought about it. The Its strength/weight ratio will exceed tion about A L LS A . One problem about letter merely explained the concept . . . balsa in all instances. its introduction is the fact that there is a substitute for balsa that would have All normal block, sheet, and strip no way to make a test run of the pro­ all of balsa's attributes, would be read­ stock will be available, but in metric duct. Its first production will be fu ll ily available, and would cost appreciably dimensions. The first material produced production, and at that time we, and less. will be sheets one meter long (30-3/8 the developers, will know for the first Our response to Dave was somewhat inches), 15 centimeters wide (almost 6 Continued on page 93 I l f I I I A FREE SUBSCRIPTION TO WIN MODELS ■ 1111 builder/ MAGAZINE Out of the goodness of our hearts (heh, heh), we offer our readers the following opportunity to win a FREE ONE-YEAR SUBSCRIPTION (or subscription extension) to MODEL BUILDER Magazine: Send us the name and address o f any the earliest postmarked letter about tha t knife set. hobby shop in your area that does not dealer, you win the free subscription. . . Send references to: carry MODEL BUILDER. We will then for yourself or the person you name, if MODEL BUILDER, Dept. D, give them our sales pitch, and if they you already subscribe, you may choose Box 4336, Santa Ana, Ca. 92702, become an MB dealer, and if yours is to substitute an Uber Skiver precision or phone (714) 547-3963.

6 MODEL BUILDER OVER THE COUNTER

Sig "Klipper" for .09 to .15 R/C, with foam wing and molded cowl, $18.95.

• Sig Mfg. has introduced two new plete with the tail wheel. The fuselage pairs . . . two planes in each box, for R/C sport planes for .15 power. The sides are printed with the former loca­ $3.95. In addition to the usual print- Klipper and Super Sport combine a flat tions, so that all internal structure can wood, strip wood, tissue, props, etc., bottomed molded foam wing with a be built directly on the wood. Both the new Sterling kits will feature va­ built-up balsa fuselage to make an easy- kits are provided with all necessary cuum-formed plastic pieces, such as to-build, strong, sport plane for the hardware except wheels. The Klipper · cowls and wheel pants. In addition, the Sunday flier. The Super Sport is a tail- and Super Sport are available from bet­ kits will include the highest quality con­ dragger, shoulder wing, with lines that ter hobby dealers, or directly from Sig test rubber. Sterling’s Ed Manulkin are reminiscent of Doug Spreng’s Stor­ Manufacturing, Montezuma, Iowa, says, "The rubber is the finest quality mer. The Klipper is a high wing cabin 50171. that I have seen since my indoor build­ plane, which uses tricycle landing gear. * * * ing days of the mid ‘30’s, and I truly The sprung nose gear, nose gear mount, Sterling Models is introducing believe that this rubber even surpasses and steering arm are included with the a brand new line of kits . . . Peanut that.” The kit combinations to be of­ Klipper. The Super Sport comes com­ Scale. The new kits will be sold in fered will include the Fokker D-8/S.E.- 5; Monocoupe/Citabria; and the Waco SRE/Interstate Cadet. Another addition to Sterling’s ever- expanding line of scale R/C kits is their new Waco S R E . The kit will feature die-cut balsa parts, as well as molded plastic cowl, wheel pants, and engine cylinders. Price is to be announced. * * *

For the modeler who would like an Old Timer, but drives a VW, Micro Models has added the Miss America, in a scaled down 48 inch span, to its line. The Miss America, which is a com­ panion model to the Mercury intro­ duced in late 1975, features all ma­ chine-cut parts. The finished plane, with a Futaba 3 Channel radio and O.S. Sig "Super Sport" for .09 to .15 R/C, with 45" foam wing and molded cowl, S17.95. Max .10, weighs 30 ounces. This com­ bination thermals well with the Miss

FEBRUARY 1976 7 Sterling Models’ 1-5/8" scale Waco S R E , for .40 to .60 engines and R/C or C/L. Span 56-1/2", price S64.95.

America’s 308 square inch wing. The products. For gas powered Jerobee rette lighter socket with the adapter plane was scaled accurately from the owners, Leisure Electronics has a com­ cord which is included. Price, com­ original Miss America plans, and as a plete electric conversion chassis, includ­ plete, is $57.95. result, meets the S.A.M. rules for Anti­ ing power train. The unit comes with A separate charge/discharge/timer in­ que, R/C assisted competition. The nickel cadmium batteries, throttle rheo­ strument is also available, for $29.95. Miss America is available through hob­ stat, wiper output arm for the throttle This unit permits timer-operated dis­ by shops, or direct from Micro Models, servo, and electric motor with spur charging and charging of the power bat­ Box 1273, Covina, California, 91722. gear. Everything is wired up and ready teries for all of the Leisure Electronics * . * * to go. The purchaser need only trans­ cars. Designed to operate from your Leisure Electronics, producers of the fer wheels, radio and body from one automobile’s cigarette lighter socket, ready-to-run, electric powered Jerobee chassis to the other. Unit can be the power cord can be converted to 1/12 scale R/C race cars, has two new charged from your automobile ciga- clip ends if a separate 12 volt car or motorcycle battery is used. * * * Sandpaper, that long-time friend (or enemy?) of modelers, is made a little easier to handle with the introduction of Ruff Stuff, by Applied Design Cor­ poration. Ruff Stuff is a self-adhesive sandpaper that adheres to metal, plas­ tic, glass, rubber, wood, and other ma­ terials. It can be wrapped around a dowel or piece of tubing, or can be formed around a channel or other special shape for unusual sanding appli­ cations. Ruff Stuff is available from your dealer in medium, fine, and super­ fine grits. The 9x11 sheets are $.39 or in packs of six for $2.50. If your dealer doesn't have it, you can order Miss America, 1935 Old Timer, reduced in scale to 48" span by Micro Models. Kit price, S27.95. direct, in singles at 39 cents, or in a pack of six for $2.50, postage paid.

Electric conversion chassis and power train for Jerobee 1/12 scale race car, by Leisure Timer-controlled charge and discharge unit by Electronics. Price $57.95. Leisure Electronics.

8 MODEL BUILDER New series of two-to-a-box Peanut Scale kits by Sterling Models. Each pair sells for $3.95.

An ideal block for the Ruff Stuff is the Tee-Bar, also from ADC. These 2 inch wide aluminum extrusion “ T ’s” are available in 11 and 22 inch lengths. The longer bar would seem to be ideal for sanding leading edges, trailing edges, and similar applications. The long length will prevent sanding ripples into the surface. It's great for evening out wing ribs to produce a smooth covering job. Ruff Stuff can be cut to fit the Tee-Bar blocks, and is easily peeled off when the sandpaper has worn out. The 11 inch Tee-Bar sells for $2.00, while "Bunny". 73 inch span sailplane by Superior Flying Models. the 22 inch version retails for $3.00. Both Ruff Stuff and the Tee-Bars are Pines Gulls (flying sites, club rules, etc.) RC/Soaring San Diego Area Handbook available from Applied Design Corpora­ the great majority of the book contains is available for $1.50 from the Torrey tion, 5531 Shore View Drive, Palos information that is applicable any­ Pines Gulls, Box 1564, La Jolla, Cali­ Verdes Peninsula, California, 90274. where. Chapters in the book include fornia, 92038. * * * * * * “ Getting Started," “ Answers to the The famous Torrey Pines Gulls Club Most Commonly Asked Questions,” The newly introduced Bunny, from of La Jolla, California, decided that “ Learning to F ly.” "Soaring in Ther­ Superior Flying Models, promises to be a their club needed a manual of “ basics” mals,” “ Pitfalls,” “ Radio Installation.” cut above other "beginner" gliders now for R/C. What started out as a very and “ Contests” . The book gives a be­ on the market. The 73 inch span, all simple, mimeographed affair, at the plan­ ginner step-by-step education in the wood kit, features spruce spars to con­ ning stage, turned into a very profes­ basics of R/C soaring. Hobby dealers struct a D-tube type wing with dowel sional 40 page, printed, bound booklet. in the San Diego area, when confronted reinforced leading edges. The fuselage The RC/SOARING San Diego Area with a new customer interested in get­ is built up from machine cut sheet Handbook is a complete guide to R/C ting started, are selling the book with stock sides. All hardware, including an soaring. Although a small portion of the recommendation that the customer E.K. Products adjustable towhook, is the book relates only to the Torrey read it before buying anything else. Continued on page 90

Pressure-sensitive adhesive on back of "R u ff Stuff" sandpaper, by Applied Design Corp., 'Number One" adjustable towhook, by J.L . permits application to various backing shapes. "Tee Bars" also available. Wittman Co.

FEBRUARY 1976 9 (Mrs.) CHAR ROHRING 4494 Tanglewood Trail Saint Joseph, Mich. 49085

• I ’ve been under the dining room table since Thursday looking for a diode. I’m going across the carpet, shag by shag, because I want that diode worse than Bill does. He needs it to fin­ ish a receiver but I need it for his Valen­ tine. I can't think of a nicer way to say I love you, than to tape that diode to a red paper heart. To me, Valentine’s Day is the high point of the winter. It always comes YOU'R GETTING PRETTY GOOD AT THE RIBBON PICKUP JOE / in the middle of B ill’s three-month “ Constructathon.” He takes a break to air with a doughnut. Finally, they clothes before meeting Irene. give me a gift and take me out to dinner. called off the drop and Bill bought the "You look tired, Char," she said . . . During the evening our conversation rest of the doughnuts for me!” and just because I nodded off before somehow turns to airplanes and we dis­ “ Why would you want all those dessert! “ What have you been doing to cuss stimulating subjects . . . in great doughnuts?" asked Irene. “ They only get so pooped?” detail . . . such as sandbagging or the make you fat. Why didn’t you use your “ You’ve got me there,” I answered. open winch. We talk vacations, too, own recipe and then the little wire “ It’s just been a normal week." and that means flying contests. wouldn’t cut through?” After dinner we went shopping at a I ’ll have to admit that in the midst “ Y o u’ve got me there,” I answered. group of interesting boutiques in Sauga- of a Michigan winter, those beautiful The next time Irene was down was tuck. This is where I found the navy flying days of summer have an alluring, the weekend of the big glider contest. scarf with the little yellow and green dreamlike quality. I begin to think that “ Didn’t you run the food stand airplanes on it. being married to a modeler is the rarest once?" asked Irene. “ I ’ve got to have this, Irene. Do you experience of my life. But you’d be "Yes, Bill was president that year.” think eight dollars is too much?" I surprised how many people don’t un­ “ Did you make any money?” asked. derstand the charm of the hobby. Try­ “ Not really.” “ You always wear brown. What will ing to explain this charm has caused me “ Why aren't you running the stand you use it w ith?” she countered. some concern and embarrassment. this year?” asked Irene. “ Y o u’ve got me there,” I said. But I By now the rough edges of last sum­ “ You’ve got me there,” I sighed. was thinking, 'with everything.’” I knew mer's bad moments are rubbed smooth Then there was the time Irene and I Bill would love it. I bought it and tied by time. I can laugh a little now. I ’m met for Sunday dinner. We picked a it around my neck. thinking in particular about one local spot half-way between her home and Driving home that afternoon I had meet that boasted a doughnut drop. my home. Bill was at a two day contest no premonition of danger. I had an ac­ "Tell me again where we’re going,” and I felt I had to stay behind to get a cident that reshaped my little car. I tele­ said my well groomed, single girl friend, few jobs finished. phoned Bill and caught him as he Irene. She was visiting from Holland, Saturday I did errands, bought gro­ arrived home. He hurried to the spot Michigan, as she has from time to time ceries, did laundry, cleaned the oven where I waited with one ruined car, since our early days out of college. with one of those miracle sprays that one bored policeman, and one group of “ What exactly is a doughnut drop?” only takes two hours (and two layers of young thrill-seekers. No matter how I phrased the answer skin off the finger tips), called 10 “ Look at my car!" I wailed. it didn’t seem sane. “ All the guys put a mothers to help with a neighborhood “ Hey, that’s really cute!” said Bill doughnut on their power planes and youth project, and answered the door­ warmly. then tip the planes in flight and try to bell eight times for children having a “ The car?” I gasped. drop the doughnut on a target.” scavenger hunt. What other house “ No, the scarf,” he said. “ That’s “ W hy?" she asked. would have a signed picture of Amelia a pretty accurate Fclker Tri-plane. Did "Y o u ’ve got me there,” I said. Earhart, a paper-back book of World they have any with a DH-10?” We went to the contest anyway. War I planes, a snap shot of The Spirit “ You’ve got me there," I said. After finding a good spot to watch the of St. Louis, and a 78 RPM record of “ Aren’t you mad about the car?” action, I started again to tell Irene “ Come Josephine In My Flying “ Not if the scarf is O K ,” he said, put­ about the advantages of being married Machine?” ting his arm around me. to a husband who builds and flies Sunday I was up early to weed the Next time I see Irene I'll try to put models. WIN garden . . . which turned out to be this all into words. I'm sure she’ll under­ “ At the last doughnut drop,” I said, a LO SE garden. Then I cut the lawn stand now why the framework of the “ the doughnuts were too fresh and the with only minor interruptions, like run­ Maestro wing couldn’t be moved from speed of the planes would force the lit­ ning out of gas, and stalling out time the dining room table when she was tle holding wire to cut right through the and again because of the length of the down last week. Weights on it here and doughnut. Nobody even got into the grass. I did manage a bath and clean Continued on page 89 10 MODEL BUILDER Brian Newman, Brian McCleave, and Jeff Lee (I to r) about to release their squadron ot uragonthes . wonaer it tney let em go an at one time, or one after the other! THE DRA60NFLU By TEX NEWMAN . . . Want to get your young son or reluctant wife at the controls without developing an ulcer? Here's a try-it-you'll-like-it R/C model for "doubting Thomases" and raw beginners. Anyone can fly it!

• It seems we had just finished one of tween flying sessions. wide variety of engines and radios. The those fine dinners Mary Ann Lee cooks “ What we need is an R/C that flies original pair were powered with .047 up, and continued to stuff ourselves like that!” diesel engines and flown single channel. with apple pie and icecream, when Bob I can’t remember who said it first, They have been powered with .074 OK picked up a little stick fuselage rubber but at any rate, a couple of weeks later Cubs and McCoy .098. model and gave it a toss. It obediently we were out test flying our new When the decision was made to go to floated across the family room and “ Dragonflys.” Since then there have OS Max 10s, a whole new thing hap­ landed on the shelf where it lives be­ been a dozen built and flown with a pened! They really didn’t fly any faster, but just climbed like an elevator . . . in second gear. Consequently, we could make low, level, slow speed (5 mph) passes and climb back up out of sight. The eventual addition of eleva­ tors added funny loops to the list of aerobatics which already included wing- overs, hammer-head turns, and spins. Dragonflys have flown with Ace pulse system,rudder-only quite success­ fully. Mine, one of the original two, is still flying with a seven channel Kraft system . . . operating just rudder and throttle. The left stick on my trans­ mitter is for rent! As a beginner airplane, the Dragonfly just can’t be beat. The novice can learn which way is left . . . both coming and going. Also, where he is over the ground as well as how to use just a lit­ tle pressure on the stick, all in a short time. This approach to R/C flying pro­ vides the beginner with a large amount of success in a short period of time with minimum repairs. One of our novices, Dragonfly on a "glide-by” shows off its rock-stable design. A perfect raw beginner's model . . Brian McCleave, had fewer than ten if they'd only believe it! Funny thing is, the "Aces" love to fly it too! You better build one. flights on his Dragonfly when he soloed FEBRUARY 1976 11 12 FULL SIZE PLANS AVAILABLE SEE PAGE 94 MODEL BUILDER Brian McCleave adjusts the throttle linkage on his OS .10 powered Kraft 3-channel-with-brick installation in Brian McCleave's ship. Dig Dragonfly. Kraft-Hayes mount. Imagine the fuel economy! the "open top" fuselage! Easy to fiddle with radio, if necessary.

. . . full flight . . . take off through get back to work. Have a nice evening.” FLYING SURFACES landing. “ Phew!” The wing and stab are very conven­ Up until a year ago there was a large Enough of this, I could tell stories all tional in construction. The wing is built open field just two houses up the street night, but you’ll enjoy flying your own in two sections and joined with two 6 from my house. The neighborhood kids Dragonfly and having your own fun inch pieces of 3/32 music wire. These would all turn out for a flying session. more than reading. So let’s get to work. slide into 1/8 inch O.D. brass tubes We’d take off and circle the field to gain First of all, call up your old flying sandwiched between the main spars. altitude, then walk back to the front buddy and build a pair. They are ten The panels are held together with hooks yard and lay in the grass while each one times more fun in pairs. Besides, a and rubber bands on the bottom sur­ took a turn to fly for a while. 12 X 48 inch sheet of 1/16 plywood face. This allows the plane to be trans­ On one such summer evening, I was makes four fuselage sides and all the ported in a Volkswagen, and provides sitting in a chair on my drive way, other little plywood pieces needed for flexing on landings when the wheels flying, when a police cruiser passed two. first hit something other than the ominously down the street. The driver FUSELAGE ground. The one thing to remember is looked first at me, than out his window Cut out two fuselage sides. Glue on the 1/4 inch shim under each wing tip at the sky, then back at me again. He the 1/8 square longerons, making one trailing edge during construction. This turned around at the corner and came left and one right side. Add bulkheads provides tip wash-out and helps make back and parked in the driveway. A, B and C and pin in place over the top stalls enjoyable. Wing rib No. 3 has “ What are you doing?” view. Note where the 1/16 plywood 1/16 balsa sheeting on top to support "Flying an airplane.” I said. sheeting goes on the bottom to rein­ the wing hold down bands. "That’s what I thought. Where is force the wing and landing gear mounts. Build the rudder from 1/4 inch it?” Draw the nose together with the fire­ square balsa and cover it before mount­ “ Up there, over head . . . ah . . . wall and add nose plywood sheeting. ing in the slot provided in the top of would you like to fly it?" Bulkheads D and E are put in after the the stabilizer. “ Oh no, I ’d probably crash it!" filler block at the tail. Install the tail When building the stab, pin the lead­ “ Not this one! It’s real easy, my skid between pieces of 1/16 plywood ing edge, bottom spars and two pieces wife even flies it. Come on.” and cross-sheet the remainder of the of 1/4 inch square trailing edge down And so he did, for five minutes or fuselage bottom with 1/16 balsa. The over the plan. Next, glue in the 1/16 more, asking lots of questions. Finally top may be sheeted after the push rods bottom sheeting. Add the 1/4 inch he said, “ I hate to do it, but I ’ve got to have been installed. square trailing edge joiner, followed by

For transportation convenience, wing is joined in center, sailplane Even old timers would be jealous of that prop ground clearance! With style, with tubes and rods. Built it in one chunk if you care to. those large, skinny wheels, you can take off from most any surface.

FEBRUARY 1976 13 No: 27&/-Ů DRAGONFLY

t h e Plan SHEET 2 OF 2 2 OF 2 SHEET

14 FULL SIZE PLANS AVAILABLE SEE PAGE 94 MODEL BUILDER Brian Newman with his Dragonfly, and Jamie Newman with his Horsefly. The little rubber ship The author hand-launches Brian McCleave's was the inspiration for the big 'un. Tex will send the plans sometime soon. Dragonfly, just to show it can be done.

all four No. 1 ribs, all glued on top of time to be sure they are properly cen­ rear mount wire. Cut off any excess. the sheeting. When the top sheeting is tered on the disc. Sand the balsa parts Do the same with the other triangle, put on, it will sand down to a smooth No. 3 to a cone shape and glue over the starting at the top of the rear mount airfoil. dowels to complete the hubs. The tires wire. Bind the brace wires on each are contact-cemented on after the side where they cross. Check the align­ WHEELS wheels are painted. ment carefully and solder all the joints. The wheels may look tricky, but The 1/4 inch dowels are bound to the they are really very e

FLYING The Dragonfly will take off from a smooth runway with an .049. Bob makes the most beautiful takeoffs with his, but he never touches the stick until the plane is twenty feet in the air . . . while I am on the controls immediately, and somehow still manage to hit things before getting off. The Dragonfly is great for thermal or slope soaring, crop dusting, parachute dropping, but mostly for having fun. We are sure it will make you a happy MODEL BUILDER!

Tex Newman releases Dragonfly for Jeff Lee, son of co-designer Bob Lee. Terrain not so good for hot pattern toads, but fine for gliders and Dp's!

FEBRUARY 1976 15 R/C News, by BILL NORTHROP

This month's column includes a first-hand report, with photos, of the 1975 Tucson Winter Nationals, by Taylor Collins.

THE NEW AMA PATTERNS Every mention of Classes A, B, C, while FAI rules stop at 11 pounds. • As of January 1, 1976, the new and D, now has to be substituted with AM A allows “ boughten” aircraft while AMA patterns and skill classifications Novice, Advanced, Expert, and Master. FA I still insists (but can’t enforce) the came into effect. As a result, many of In addition, all but a few of the novice B.O.M. rule. If w e’re going (more or the paragraphs in the 1974-75 rule maneuvers are now based on the FAI less) to adopt FAI maneuvers in all of book, Section 35, will reflect the pattern schedule, so Section E of the our skill classes on the pretext of pre­ changes. AMA RC Pattern Judges Guide is all paring our fliers for FA I team capa- but eliminated. It should be understood that unless specified as a 100% FAI Pattern contest, all sanctioned AM A R/C Pattern events will be run under AM A rules, but with FAI maneuvers. Confusing? You bet! And to add insult to injury, some classes have simplified (?) FAI maneuvers, and Novice has retained a few of the original AM A maneuvers (such as the old Straight Flight Out, Procedure Turn, and Straight Flight Back) which, are not part of any FAI maneuver! It’s beginning to look more and more like we better wipe off the slate and start all over! If most pattern fliers agree that we should align our sights with the FAI, then let’s do it all the way and stop ‘‘Messin’ with Mr. In Between.’’ On the other hand, all pat­ tern maneuvers (not counting some of the Sport Biplane snap stuff) are com­ binations of rolling and looping man­ Col. Bob Thacker, the ever-present necktie, Charlie Smith and his beautiful P6-E. See and his 1st place Sport Scale trophy. euvers, and are therefore familiar and Classifieds about plans for 2 " scale model. judgeable even when seen for the first time. Getting away from the maneuvers themselves, we find more confusion. AMA allows lead sleds up to 15 pounds,

Jack Aycock, Colo. Springs hobby shop own­ Wolfgan Matt, Class D winner, collects addit D Novice winner, Rusty Van Baron holds er, 1st in Class B. Trophy Girl Denise Stauffer. ional award from Denise. Beats a trophy ! Denise, Denise holds his Dirty Birdy. Hmmm.

16 MODEL BUILDER Tucson Winter Nationals, with largest prize value ever offered for an unrestricted entry R/C contest ($10, 986.00).

Dave Brown called for Bob Reuther during the Quarter Midget Bob Reuther called for Dave Brown in D Expert Pattern event, races. Bob placed third. Sorry we don't have judges’ names.

bility, hadn’t we better make them use it in the top echelons of aerobatics. to the FA I limit of 5 kg (11.023 lbs.). FAI-acceptable equipment? The name of the game here is flying FAI R/C NEWS Well, it’s probably O K to go along sk ill. . . period! The December 1975 FAI meeting with the AM A "boughten" airplane rule As for the 15 pound gross limit, developed some interesting news and in pattern. By the time a flier becomes ready for takeoff, we agree . . . it sure future competition schedules. proficient enough to be a potential FAI is gross'. How or when that paragraph The 1977 R/C Aerobatics World team member, he has probably learned (4.2) got in there, we don’t recall, but Champs have been scheduled in Hanno how to "build his own model” to the no pattern flier, even with half a brain, Prettner’s back yard . . . Klagenfurt, satisfaction of the FAI. And besides, would try to perform maneuvers with a Austria. even the FAI can’t hold out forever. 15 pound model powered by a .61 en­ The R/C Soaring World Champion­ As much as we favor "rolling your gine. In fact, for safety reasons, we ships (no motorgliders) has been sche­ own,” it really is ridiculous to require intend to ask that this limit be lowered duled for South Africa, in April 1977.

Bob Heitkamp, Pikes Peak R/C Club, 2nd in No, Wolfgang is not calling Takeoff for his scale P-51. That's a real one, and it landed and taxied QM. Modified Deja-Vu, bronze and orange. by while he was in the middle of a pattern flight! How's that for concentration.

FEBRUARY 1976 17 Scale World Championships, includ­ ing R/C and C/L, plus a special R/C helicopter competition, is scheduled for Bolange, Sweden, on june 18 to 25, 1976. A tentative offer has been made by Mexico to host the 1979 R/C Aerobatic World Championships. R/C Aerobatic rules, including latest changes, are to be frozen for 3 years. R/C Pylon model specifications (1975 rules) are frozen 3 years. (Paris was cold in December 1975!) R/C Electric rules were accepted as provisional. R/C Helicopter rules were agreed to except for definition of model, size, and weight. Sport Scale rules were adopted as provisional. Next month we’ll go into the latest aerobatic rules that made it into the 3- year deep freeze. Beautiful pattern bird "Kosm o" by Benito Bertolani. of Italy, who, along with Wolfgang Matt, stayed over from the previous week's Las Vegas Internats to compete in Tucson. He placed 4th. DUSTERS DON’T DIE Bill Robinson, Rapid City, South Dakota, sent us some photos of his Duster, a design of ours that was pub­ lished in a 1964 issue of Model Airplane News. “ Just thought you might like to know . . . Old Dusters never die. Someone just adds a little here and cuts off a little there and . . . all of a sudden you have a military trainer type model (a trainer with just one cockpit?). “ A while back, MAN was selling out some old plans. The Duster was among them. I ’m sure it was your design, how­ ever, the name on the plan is spelled Northrup. (That's a battle we'll never win. wen) Last year I decided to make it my winter project. Since it was de­ signed during the reed period, I thought maybe a few modifications would be in order. I shortened up the wing area to about 1000 squares, with just a little di­ hedral on the lower wing and the top wing flat. I left the fuselage moments the same, but did knock off a little stab Citabria Pro. by Dave Linne, Phoenix, Arizona. Kraft power, Pro-Line radio, K& B Super-Poxy area. For the cabane struts, I used finish. Another Pro, built by Bob Godfrey, placed 3rd in Sport Scale.

Partial line up of the scale entries at Tucson. Kent Walters' Corsair (2nd) and Dick Schofield's Other end of the scale line-up. Jack Aycock's P-63 King Cobra (5th) can be seen here. 4th place B-25 is one of the two shown.

18 MODEL BUILDER eighth inch welding rod, which bends easy and seems to work OK. One of Halco’s heavier gear was used, along with 3-inch wheels, to cope with a rather rough flying site. Solarfilm was used on the wings, with a painted fuse­ lage and tail. The insignia is regular Monocote. Up front is one of the earlier HP 61’s which hauls it around in good shape. "On about the 5th flight, a bad cell in the flight pack caused an attempted subterranean flight. At first I thought it was a total, but a couple of our club members talked me into a repair job. At this writing I ’ve put on about 15 ad­ ditional flights. It flys well, however, rolls remain sluggish, even with all the aileron I could muster on that lower Sport Scale winners (I to r): Bob Godfrey (3rd), Col. Bob Thacker (1st), Kent Walters (2nd), Jack Aycock (4th), and Dick Schofield (5th). wing. Slow flight is fine, but it will not spin. Who cares?? I can live without wide Halco gear helps a lot. An inter­ name escapes us now, sent us a Japa­ spins. (It should spin quite well. esting thing about this "o ld " design is nese kit of the Duster. It had a differ­ Chances are your balance point is just that it very much resembles a hot ent name . . . something like "Sky a little too far forward... fine for rock- “ new" bipe. I won’t mention the Queen” or "Cloud King.” but the plan stable flying, but it cuts down on aero­ name, but it rhymes with (Censored. was an exact copy of the M.A.N. draw­ batic ability, wen) Inverted flight is a Any resemblance to a current popular ing . . . even to the point of cutting cinch, and requires very little down to design is purely complimentary, wen)." the rudder off of the fin to fit the keep the nose up. Takeoffs and land­ Another Duster tid-bit . . . some undersized plan sheet! Still have the ings are easy . . . I think maybe that years ago, a military modeler, whose Continued on page 90

ST powered Quarter Midget, out of control, flew through crowd, chest Mike Abernathy, official score runner for the Tucson Winter Nats, high, and buried engine in VW bus, where it stuck. Brrr! and his trusty steed. We know his help was appreciated.

Warren Newbury, Bakersfield, California, built this K & B powered Bill Robinson, Rapid City, S. Dakota, built this Duster, a 1964 des­ Bi-Prentice from MB plans and added ailerons. Sez it flies nice, slow. ign by MB.s editor, with modifications explained in the text.

FEBRUARY 1976 (9 Here s our resident whirly "B ird " with the Helix fuselage sitting atop And the "after" shot, the completed Helix autogyro, before trim the huge kit box in which it arrived from Germany. paint was added. Disc underneath starts rotor at takeoff.

• Now that the Christmas season is blem and are novel enough to keep ones over, ‘tis the time to be constructive . . . interest at a peak. For this writer, R/C and that’s exactly what I ’ve been these helicopters have really filled the gap, past few days. Santa was very good to but I have noticed a lack of enthusiasm me this year, in that he delivered my amongst the modellers . . . perhaps the “ Helix” autogyro kit from Wik-Modelle, kits are too expensive, or the learning Germany, and provided me with a four- process is too frustrating. day weekend in which to put it to­ Well, the answer to that one is to try gether. autogyros. They are very inexpensive In .the November ‘75 MB, I briefly to construct, for the most part they are mentioned that I had seen the proto­ extremely stable, and they present un­ type “ Helix” in Knittlingen, Germany, limited opportunity for experimenta­ and watched in-flight movies to the tion. Although autogyro activity is point of being intrigued by its novel very high in England, France, and Ger­ flight characteristics. I just had to have many, U.S.A. participation is almost one! While our flying sites are shrink­ nil . . . in spite of the huge number of Note blade droop in at rest position. Blades ing in both size and availability, I have full size Bensen Gyrocopters built and "flap " upward during rotation and lift. long felt that rotary-winged aircraft are flown by sportsman pilots. the ultimate answer to the space pro­ Autogyros certainly will not take the

20 MODEL BUILDER Stab is mounted plug-in style, similar to sailplane wing attachment. Stab installed. Note interior plywood formers and rudder spar. Tailwheel bracket bolts directly to fuselage. Kraft-Hayes engine mount bolted to fuselage firewall. place of helicopters, but they do offer "downward” through the blades in can quickly realize that autorotation is a tremendous potential for fun flying creating lift. Conversely, the autogyro is dependant upon many things. For ex­ with a limited capitol outlay (see April pushed or pulled through the air by the ample, shallowing-out the path of flight ‘75 MB for construction details of an engine and conventional propeller, thus (and thus the relative airflow), can extremely stable twin rotor R/C auto­ thrusting air “ upwards” through the place the resultant “ behind” the rotor gyro, by Skip Ruff). rotor blades, causing them to rotate axis (Fig. 2), with the net result being Helicopters and autogyros look alike much like a windmill. This rotation, that the drag component stops the in physical appearance, but the simi­ under certain conditions of blade angle, rotor completely. A low-lift/high-drag larity stops there. The helicopter main speed of rotation, and relative wind, airflow will also have the same effect rotor blades are driven directly by the will create a situation called “ autoro­ of stopping rotation. engine, and gulp huge quantities of air tation", which tends to keep the blades For the above reasons, the blade rotating without power. Much has been written on auto­ rotation and many varied opinions have been expressed as to “ positive” or “ negative” angle of incidence on the main blades. Perhaps a brief descrip­ tion of the forces involved is in order at this point. In Figure 1, I have exaggerated the forces deliberately to emphasize the gyplanation. As the blades rotate around the rotor axis, lift and drag is produced in relation to the relative air­ flow (angle of attack), irrespective of blade incidence. Lift is perpendicular to relative airflow and drag is parallel to relative airflow. At very high angles of attack, as illustrated above, the “ resultant” of lift and drag indicates an upward and foreward force . . . the up­ ward force provides "lift” and the fore­ ward force pulls the blade ahead in Engine and fuel tank bulkheads above, oval "autorotation” . If you care to experi­ Removable servo mount in place on main ring bulkhead to tail boom below. ment with the drawing yourself, you bulkhead. Buckets of room!

By rotating carburetor of HP .61 engine 9 0° in direction of normal Plastic engine cowling installed. By reversing running direction of operation (counterclockwise), engine will run in opposite direction. engine, normal right hand propellers may be used.

FEBRUARY 1976 21 Main rotor assembly is same as Wik-Bolkow BO-105 helicopter head. Installation of start-pulley on free-wheeling drive shaft. One-way Schluter "cardon" head with flapping blade mounts. clutch permits wheel to turn rotor, then free-wheel during flight. angles and correct airfoils are chosen to a small drag, or anti-rotative force, epoxy body shell. produce the maximum autorotative for­ which tends to decelerate the tip por­ Earlier versions of the "Helix” un­ ces in any given configuration. The an­ tion of the blade. The inner one-third successfully duplicated the mechanics gle of incidence varies from about -3° of the rotor disc is known as the stall of the Cierva autogyro . . . it wasn’t un­ to +3°, and the main rotor axis is usual­ region, which creates little lift, but con­ til 1973 that the present rotor control ly tilted back around I0 ° so that the siderable drag. The stall area also tends proved an unqualified success. This relative airflow insures a “ good bite” . to decelerate the blade. Only the cen­ rotor head, incidentally, is identical to It might be interesting to note that ter one-third of the disc exhibits the that used in the Wik-Bolkow 105 R/C during autorotation, the outer one-third foreward inclination of the "resultant” helicopter reviewed in an earlier MB of the rotor disc is “ driven" and is which accelerates the blade foreward in issue. Main rotor diameter is a very called the propeller region. The aero­ autorotation! Small wonder we have large 7’-8” , and rides on top of a 4 ’-4” dynamic “ resultant” inclines slightly difficulty in obtaining good autorota­ fuselage. Flying weight is between 7 behind the axis of rotation and creates tions in our helicopters! and 8 lbs., and requires a hefty .61 The word autogyro was coined by engine. the Spanish engineer, Juan de la Cierva, Since the Helix is a pusher type who built the first flyable gyrocopter in rotorcraft, I had the choice of carving 1922. By the mid-thirties, the helicop­ left-hand props, or reversing engine ro­ ter was gaining in popularity and the tation. Being lazy, 1 chose the latter autogyro almost disappeared. Igor Ben- and rotated the HP 61 front case cover sen, the gyrocopter enthusiast, revived 9 0 ° in the normal direction of rotation. the interest and now, gyrocopters are in By putting the prop on backwards, I great demand. had just what I wanted, a pusher Well, enough history and theory . .. engine! back io the “ Helix". The entire kit, Before takeoff, the main rotor must including fiberglass fuselage, is pack­ be brought into rotation. This is ac­ aged in a giant size, well constructed complished by winding a 30 foot cord box. It had to be good to stand all around a pully attached to the bottom that “ round-the-world” crunching dur­ end of the main rotor shaft, running ing the Christmas season! Internal the cord through the tail wheel fork, packaging was generally good, except then standing on the end of the line. that the landing gear was stuffed into When engine power is applied, the fore­ the fuselage without too much protec­ ward motion unwinds the cord, spins Main rotor shaft assembly. Free-wheeling unit tion and subsequently punched a couple up the main rotor, and keeps the model is at bottom of shaft, grips shaft from pulley. of holes in the otherwise beautiful Continued on page 80

Control links to main rotor swash plate. Front rod is for up/down Anti-rotating rod and mounting bracket, prevents swash plate from pitch control, side rod for L/R banking. turning with blades. All photos by author or son Kim. 22 MODEL BUILDER The Deluxe Miter Sander, assembled and ready to use. The long, grooved tongue is used when sanding dihedral bevel in root of large wings. Smaller work is held on tilt table, with proper angle set. " T " fitting keeps work lined up properly. PRODUCTS IN USE

Custom Craft Products' DELUXE MITER SANDER, by Bill Northrop.

• Everyone is familiar with that fa­ tion of model airplanes, however, like white glue, and contact cement. A flat, mous quote, “ A joint that fits together, any precision tool, the number of uses sturdy work surface is also handy, as stays together . . . and a little glue is up to the imagination of its owner. several of the basic parts are glued and helps.” Custom Craft Products, 19 Flor- In addition, the Deluxe version provides nailed together. gate Road, Farmingdale, New York for beveling the dihedral joints of large Instructions for assembly are quite 11735, concerns itself with the first foam and/or balsa wings. clear, and the whole process can take part of the quote. The company pro­ The Miter Sander is designed to be­ less than an hour. Only a few joints are duces a kit from which a precision vel, angle, or square up a cut on most held by glue alone, and these, of course, miter sander may be built. There is a all of the normal model building ma­ must be given time to dry completely Standard and a Deluxe model, and this terials. The Deluxe version will han­ before operating the unit. report concerns itself with the Deluxe dle work up to 14-1/2 inches long and To accurately bevel the root end of version. 3 inches deep. a wing for the dihedral joint, the di­ The primary purpose of the Custom Assembly of the kit requires only a hedral tongue is plugged in with the Craft Miter Sander is to provide accur­ minimum of tools and materials: ham­ grooved side up, and the tilt table is ately fitted beveled joints for construc­ mer, small and medium screwdriver, Continued on page 80

Miter Sander in use with a sheet plastic cover­ ed foam R/C wing. Tight, strong joint results.

FEBRUARY 1976 23 sIííIsííIsíjhs*! r J-

f. .ííťťg $ ' ■5 . SHEET 3 2 or

Prints of this airplane are available from Peter Westburg at $7.50 per set. See ad on page 82 MODEL BUILDER The 0-1G was a greatly improved Falcon, with a tailwheel, better faired fuselage, wing cut-out, and many changes in engine cowling, landing gear, and rear cockpit. This late 0-1G is also equipped with radio.

By PETER CURTISS A-3 FALCON WESTBURG PHOTOS FROM USAF MUSEUM • In the Air Corps, the Falcon was Conqueror, a 12 cylinder radial hex as a seaplane on a single pontoon and powered by either the Curtiss D-12 or engine named the Chieftain, and the wingtip floats was sold to Columbia. the 420 hp Liberty 12. The Liberty P & W Wasp radial of 410 hp. The The Falcon design persisted through powered Falcon was known as the 0-11. Wasp engined Falcon was not adopted the 0-39, which had a Conqueror engine The Air Corps also used the Falcon as by the Air Corps, but the Navy bought front end almost identical to that on the an attack plane, the A-3 series, to replace it, and as the OC-I and OC-2, it became Hawk P-6E, and large streamlined fair­ its aging DH-4's. In this guise, it had the predecessor of the famous Helldivers. ings over the wheels. Only ten were two guns up front in the fuselage and In civilian service, the Falcon was manufactured and four were lost in one in each lower wing firing outside used as a mailplane, one being flown by accidents while flying the mail in the the propeller arc . . . and up to two Charles Lindbergh. Another was 1934 crisis. hundred pounds of fragmentation bombs powered with a Wright Cyclone and The last Falcon was the Type II, could be carried. used as a mailplane, before being sold powered by a 745 hp Wright Cyclone The Air Corps experimented with to Cuba. The Falcon was exported to enclosed in an anti-drag ring. It looked other engines, notably the Curtiss many countries in this hemisphere; one much like the Douglas 0-38F, with a

Airplane No. 63 of the 13th Attack Squadron, Fort Crockett, Texas. This A-3B had a white flash on the cowling when flown by the 13th. Rear gun is a single Browning on a Scarff ring.

FEBRUARY 1976 25 26 Prints of this airplane are available from Peter Westburg at $7.70 per set. See ad on page 82. MODEL BUI LDER Front cockpit of an A-3B shows instruments grouped around left-hand .30 caliber Browning and right-hand .50 caliber gun. This airplane was equipped for blind flying instruction, with cover over windshield and hood fasteners. canopy and a fat fuselage. It nearly took the life of test pilot Lloyd Childs when the wings came off due to vibra­ tion in a shallow dive. Childs bailed out at 2500 feet. Structurally, the Falcon was advanced for its day, in the wide use of aluminum tubing for the fuselage frame and tubing and sheet in the tail surfaces. The art of welding aluminum had not yet been perfected, so all parts were riveted and bolted together. The wing structure was conventional hollow box spars with spruce flanges and two-ply spruce webs, truss type ribs with spruce caps and birch plywood webs. The basic color scheme was the usual Air Corps olive drab on the fuselage, struts and landing gear; chrome yellow on the wings, fin and horizontal tail. Insignia was standard stars and bars; lettering on yellow was black, and white on olive drab. ·

Front view of characteristic tunnel radiator. Classic Falcon tail, remembered by anyone who ever saw the airplane. Tail surfaces were dural Prop forged and twisted from aluminum slab. sheet and tubing, riveted together and covered with Grade A cotton fabric.

FEBRUARY 1976 27 * ^

Qu'Appelle Valley, Saskatchewan, Canada, scene of the 2nd Annual Friendship Slope Soaring meet. What a site!

cant part of the hobby. It is my feeling that it is going to take action, not more griping, to continue this growth. R/c SOARING ä Many fliers are becoming more vocal about contest rules which they feel are • As this is being written, Christmas is shone even the most vocal backwoods unfairly favoring landing proficiency approaching all too rapidly . . . but in preacher on Sunday morning. over flight performance. These people spite of my holiday problems (like what Hopefully, most of this noise is be­ may have a point to argue . . . if they to buy for my soaring-nut wife), I am hind us. Soaring is reaching a moderate have a viable alternative. The point is attempting to make this column sound level of maturity in the U.S. We are fly­ that any changes in our present rules like it should when it will be read in ing in-contests that are being recognized will have to be made through the February. as significant. The level of flying pro­ A.M.A. In order for a rules change to The year 1975 was one of griping . . . ficiency is becoming more uniformly become effective by January 1, 1978 griping about the A.M.A. and what it is excellent throughout the country. And (which is the earliest that any change and isn’t doing for a soaring, griping, the wheels are slowly starting to turn can take effect), the proposal for the about the N.S.S., about contests, rules, toward the U.S. competing internation­ change must be in by June 1, 1976. sailplanes, and people. Everyone had a ally. In short, though some of the grow­ (And to carry weight, it should have pet personal opinion about what was ing pains are threatening to kill the pa­ the backing o f the N.S.S. wen) wrong with soaring, and every opinion tient, the gentle art of remotely actu­ I personally have no axe to grind on was expressed with an urgency that out­ ated glider guiding is becoming a signifi­ any rules change. I fly the plane that I feel gives me the best edge in the com­ petition, and do the best I can from that point. As long as everyone in the contest flies to the same rules, I ’m happy. But, as food for thought, I would like to air some suggestions and ideas that I have received. One major bone of contention in 1975 was classification of airplanes. Many fliers feel that a class, limited to two control functions, encourages new­ comers into competition. Certainly, we need to encourage more people into competing, if the hobby/sport is to grow beyond its present level. One al­ ternative to classifying the aircraft, is classifying the fliers. Dave Harvey, of the Seattle RAM S Club, writes that they have been hold­ ing two-class contests, with the pilots Line-up of "Cutie Pie" sailplanes for one-design competition. Fiberglass fuselage and kit prod­ divided into “ Proficiency" and “ Com­ uced by G.B. Glass Products. petitor” categories. A point system was

28 MODEL BUILDER Start of Open Class pylon race at Friendship Slope Soaring meet. Contest was sponsored by G.B. (Gary and Brent Reusch) Glass Products. devised, based on performance in con­ be aligned into the wind. Landings are tests. For each first place win a flier re­ measured with the conventional tape, lieves 3 points, for second place 2 but a score is received only for landing points, and for third place 1 point. within the wedge. The idea is that this When a flier has acquired a total of 4 will eliminate the "luck” landings. Gol­ Exotic original design "M ariah", by Jack points, he is 'graduated' out of the ly fellas . . . those are the only kinds I Chambers. More information in text. “ Proficiency” category into “ Competi­ on fellas . . . if you don’t send me infor­ tor” , Dave tells us that in their first mation, I can’t let the rest of the world contest, the groups were almost exactly know about it!) equal in number. (One more factor should be considered. A 1st place Another direction to go with com­ against 100 contestants is much more petition is a one-design, or one-class significant than a 1st place against 10 contest. Milt Swan (M&S Ltd.), with contestants. Refer to the AM A pattern the sponsorship or several other manu­ classification system. A flier is unfairly facturers of six foot sailplanes (and promoted if he wins a few minor con­ M O D EL B U IL D E R ), put on the fourth tests. wen) annual Formula 72 contest in the Los Angeles area. This contest was limited The Torrey Pines Gulls club carried to planes of no more than 72 inches this idea a step further. They held a wing span, with a minimum wing load­ “ Pro-Am” contest. In their contest, the ing of 7 ounces. Milt used a small dia­ “ Pros” (better, more experienced fliers) meter rubber, short high start for all had the option of doubling their scores launches. With the much-shorter-than- by doubling the flight times for the usual launch, the three and four min­ tasks. If they failed to make the ute duration rounds were very challeng­ doubled time, they received a "0 ” for Many people are in favor of follow­ the round. Sporting chaps aren’t they? ing the example set by the full size ing. Incidentally, Dave Thornburg On the other side of the coin, there soarers . . . with events designed to­ drove all the way to Los Angeles from is growing support in the Southern Cali­ ward speed over long distances. This Albuquerque to win the contest with fornia area for a modification of the type contest (if the models in any way Top Cat. These are but a few of the many usual landing circle or runway. The perform similarly to the full size) will idea is to use only a wedge, rather than put a lot more emphasis on the aircraft ideas that are bouncing around. But a full landing circle. The ‘wedge’ is to design. But as with all speed or distance Continued on page 68 tasks, it requires much more in the way of manpower to handle turn flagging, etc. The San Fernando Valley Silent Fliers recently had a 20 mile cross-coun­ try race. A start point and finish point were selected on the desert, east of the Valley, and the fliers and their helpers were given a one-hour period to get into the air. From that point, any number of relaunches were allowed, as long as the model was being towed some di­ rection other than toward the finish. Each team had to furnish one person to serve as timer for another flier. Unfor­ tunately, I don’t have any more details on this most interesting contest. (Come Dave Jones and his original design for Formula Fully enclosed rudder hinge line on "M ariah." 72 contests. Weighs 21 oz. with Cannon Mini. Covered stab hinge, streamlined skid wire.

FEBRUARY 1976 29 IS SOARING FOR THE BIRDS???1' PART I

By JIM GRAY . . . This article is too good to pass up, and too long to run in one issue. Therefore, even though we dislike cutting it into parts, we are starting it in this issue, and will continue it for the next few months. It's scientific, but not heavy; informative, but not dull... in fact.. . it's fascinating.

• Fellow sailplaners, I ’d like to ask liberately ( I’m sure) lead me into some ally it’s covered with red Monokote), you a few questions. How many times heavy sink downwind, only to flap I ’ve been joined, both on the ridge and have you been “ working” a thermal away in triumph, probably cackling to in thermals, far more frequently than with your R/C model sailplane, only to himself, while I tried to make it back to ever before . . . by red-tailed hawks! have a hawk or other soaring bird join the field. Dumb animals? Stupid birds? Birds are not color blind, and I ’m con­ you for a few lazy circles? Did he stay Far, far from it, as you will see if you vinced that they recognize my red tail, and provide you with a good lesson in haven’t already seen from your own ex­ thinking at first it may be one of their thermalling ability and soaring effi­ periences. own kind. They’re right, of course, but ciency, or did he “ sniff” your lift and Rarely am I able to out-soar that in terms of spirit . .. not ability! As to after only a brief turn or two disdain­ kind of competition. These soaring attack, it happened only once, and I ’ll fully leave for “ greener” air? birds find and use lift I don’t even sus­ have to take you back a few years to Have you ever tried joining a hawk’s pect as being there . . . or, if I do, they tell you about it. thermal? Did he object, or did you climb in it faster and let it carry them Shortly after WW 11,1 owned a small both spiral upward in harmony until farther away than I dare to go. More Taylorcraft BC-I2D and flew it from a you were a mere speck in the blue? often than not, hawks seem to be indif­ small grass-covered strip at Painted Post, Have you ever been attacked by a soar­ ferent to my presence in the same ther­ New York. One day I took off in a ing bird . . . and have you ever chased mal; provided, however, that I don’t try crosswind that drifted me toward an one, only to have him suddenly “ peel to approach them too closely. They ap­ old, dead tree as I climbed out in the off” and depart the scene at a high rate pear to mind their own soaring busi­ pattern. As I went past the tree, and of speed? Have you ever had several ness, apparently taking my sailplane as perhaps fifty to one hundred feet above hawks gang up on you to drive you some kind of not-too-bright flying crea­ it, I noticed a large nest in the top of from their “ territory” , while shrilly ture to be pitied for its lack of knowl­ the tree. My first indication of attack scolding you all the while? Did one edge of the finer points of technique came incredibly fast, without any warn­ ever stay around and fight? and superior know-how. ing whatsoever. In a blur of speed, far These things, and more, have hap­ Only when I transgress the invisible too fast for me to react, a red-tailed pened to me or my fellow sailplaners boundaries of a hawk’s "territory” do hawk flashed diagonally downward, pas­ here in the Elmira, New York area . . . I invite censure . . . in the form of an sing between my windshield and propel­ and often enough that we believe soar­ unmistakable warning, even attack! ler. Apparently the hawk started his ing birds soar for fun and enjoy it as The warning is a sudden “ flip up” into dive from behind and above. Since in much as we do! a vertical bank, accompanied by a quick climb, I was indicating about seventy Being a newcomer to R/C soaring, flap of the wings and a sudden lowering miles an hour, so the hawk had to be I ’m always "turned on” by the excite­ of his undercarriage (landing gear) tal­ doing at least that; my guess is that it ment and surprise of events such as ons extended, ready to strike. This was probably closer to one hundred! I those described above, and I always clearly says “ Keep your distance, stran­ suspect he had been hunting at a higher enjoy trying to out-soar my feathered ger, this is m y turf.” altitude and saw the T-craft head for his friends, as long as things remain on a Strangely, since I painted the stab nest. Instant reaction . . . a natural de­ friendly basis. Once, I had a hawk de­ and fin of my small sailplane red (actu­ fense of home and family. Following the attack, I looked down and behind For others I ’m still searching for in­ formation and answers. So far, these answers seem to indicate that R/C soar­ ing and bird soaring may have much more in common than any of us has ever suspected. I hope you will be en­ couraged by what I have to say in the following pages to tell me of your ex­ periences, and share your knowledge with me. You will find that I am wrong in many cases: or at best, only partly right. Tell me, I want to learn! To­ gether we can be greater than the sum of our knowledge, for we can synthe­ size, invent, explore new ideas and . . . hopefully . . . have a lot of fun in the process. Churchill was reported to have said: “ Oh how I love to learn, and how I hate to be taught!” Let’s make it a point to make the learning process pleasureable and instructive for all of us, for the results may just possible ad­ vance the art of R/C soaring a few more steps along the way from the shire of speculation to the city of certainty. Continued from page 61 30 MODEL BUILDER By ROD CARR

• In the following account of this start, there were 6 boats: This month’s column is for the racing skipper. It concerns No. 374-BOOMERANG, No. 757-BINGO, No. 75-SOLING, itself with one start of one heat of the Pumpkin Regatta, held No. 413-WARRIOR, No. 392-WARRIOR, and No. 498- by the Richmond M YC last fall. The lake was not clear of sur­ M O O N RAK ER . I have sailed with almost all of the skippers rounding obstacles, nor was there an overabundance of wind. and wish to point out that they had one minute to decide Yet, this one heat will illustrate many of the do’s and don’ts of what to do, and had to make their decision based on their model yacht starting. I am indebted to Doug Barry, of the Tri- best estimate of the upcoming conditions. Nothing I say here State MYC, for the photographic coverage and for the time should be construed as derogatory, as I have pulled each of and effort that he expended to make this contribution. I cer­ the tricks at least 50 times myself. But as you read through tainly wish there were more skippers like him to help in the the scenario, ask yourself along the way, “ What would I have job of explaining the sport to novices and experts alike. done if I was the skipper of boat No. so-and-so?” YO U will It is generally agreed that the boat that gets the best start find this most useful. is the one that is in control of the situation half way down the In the photographs, the starting line has been indicated as a weather leg. It is not necessarily the first boat over the white dashed line between the two buoys. The direction to starting line, nor the weather boat, nor the fastest boat. In the weather mark is to the left. The average wind direction Eric Twiname’s book, ST A R T TO WIN, he lists the three was directly parallel to the starting line, calling for a start to things to aim for in starting, in order of importance: be made on a starboard reach, somewhat above a beam reach. 1. Clear wind, and no boat nearer than a boat’s length to Under the circumstances of geography and wind, this was the leeward. best the race committee was able to set. In the diagrams, each 2. Full speed as the gun goes off. boat is followed by a series of dots. They are a measure of 3. The bow to hit the line no more than a second or two relative boat speed (the more dots the faster the boat is travel­ after the gun goes off. ing), and a measure of recent path (a curved series of dots indi­ He feels that being late is less a sin than being slow at the cate a turn). Each picture and diagram is identified by the start, and neither being late nor slow, is as bad as being blan­ number of seconds away from the starting gun. Pictures be­ keted, or covered, or luffed by other boats so that you can’t fore the gun are indicated by minus seconds, and after the gun sail your own race. by plus seconds.

full way on, and with no one below you who would luff you up and make you miss the starting line.

Minus 50 Seconds

M IN US 60 SECONDS: At one minute to go, 5 of the starters appear to be “ shooting the line” in order to check the course to the weather mark. All are moving at similiar speeds. No. 374 is down to leeward of the pack and is risking being M IN US 50 SECONDS: No. 75 is starting to turn to starboard caught behind a “ snow fence” , so called because a light breeze in order to follow 757 up to windward of all the rest of the will actually lift off the water to get over a bunch of boats and boats. No. 498 is continuing to turn sharply and is seeing his leave a hole downwind of the bunch, filled with dead air. speed and momentum decrease as a result of it. No. 413 is Quite obviously, the start will be on starboard tack, so it be­ shooting the line with the intent of rounding up to starboard, comes a question of starting near the weather pin (buoy), with tacking and then gybing into position for the start. Mean­

FEBRUARY 1976 31 while, No. 392 is circling to weather of 374 and the latter is M IN US 30 SECOND S: Now the plot thickens. Both 757 and still sailing away from the line, a risky choice in such light 498 suddenly pick up speed. This may have been due to a airs. At this point, No. 392 should have hardened up and small puff local to them, or to the passage of a puff a ways up driven directly at the weather pin, circled it and been in good off the water, which only their tall rigs felt. In either case, it position for a start with good way on. must have had an extremely limited extent, for the four other boats apparantly have not felt it. They are both on port tack and will have to gybe (turn their sterns through the wind) to head back toward the line. In such light airs as this, gybing is preferred to tacking. The former will help maintain momen­ tum and keep the boat moving, while the latter will require the boat to coast, head to wind, and kill headway and maneuver­ ability. No. 413 is tacking and will lose speed as a result, as is 392. At this time, 374 is in the catbird seat, she is sailing on starboard tack, is aimed right at the pin, and controls every­ body to weather of her.

Minus 40 Seconds

Minus 20 Seconds M IN US 40 SECONDS: No. 392 chooses to bear off and head away from the line, downwind from the pack. No. 374 begins to tack to port, with which she hopes to be ready on starboard tack to drive for the line and luff anyone above h e r. . . a good tactic if she can find a puff with which to get moving. No. 75 has tacked and chooses to re-cross the line by driving directly for the pin, since she is not able to do otherwise with the ar­ rival of 413 on starboard tack (who has the right of way). No. 757 has placed herself directly to weather of 498, both of these boats being on port tack.

M IN US 20 SECONDS: No. 413 has filled away on its new tack and has only to gybe around the pin on time to have a good start. No. 75 has felt the puff previously used by 757 and 498, and re-crosses the line, also ready to gybe onto starboard tack and a good start on the line. No. 498 has gotten herself into trouble. She has gybed around and at some point come down upon 374. If she made contact while gybing then 374 should protest since she was on a tack and privileged while 498 was not on a tack, ie. gybing. If 498 had completed her gybe, and then made contact, then 374 should protest since she is the leeward boat and 498 must keep clear. In these drifting conditions, I would say that 374 suffered a significant change in course and speed as a result of 498, who is entitled to 2 foul points for her error in either case. No. 757 has wise­ ly stayed clear of 374, and is beginning a wide sweeping turn designed to conserve her momentum as much as possible. It looks as if 392 is still trying to tack and just does not seem to have the headway necessary to get the bow through the wind. And to make things worse, the "snow fence” is beginning to form to weather of 392, as many boats start to congregate at the weather end of the line.

32 MODEL BUILDER sharply and lost a good deal of her momentum. No. 392 is underway and looks like she will go high for the pin to avoid being backwinded by the fleet. There is no reason in such a position to blindly follow the pack. No. 392 should split off and see if she can get a shift, or by sailing in clean air, make up on the leaders who are fighting among themselves. No. 392 has the benefit of having only to concentrate on boat speed, and need spend no effort on tactics, as do the boats out in front. No. 757 is faced with trying to find a clear path to the line, and has elected to go above 498, who had no way on and couldn’t luff up, but below 75 who would have to keep clear of a leeward boat eventually. The projected path is marked on the diagram with a series of x’s.

M IN U S 10 SECONDS: With only 10 seconds to go, No. 75 is gybing for the line and looks like the one that will grab the start. No. 413 is in a good position as she will wind up to weather of 75 after the start, and even if behind, will control 75’s moves. The 374/498 raft-up is almost dead in the water, and I ’m sure the skipper of the former is not the least bit con­ soled by the 2 foul points his opponent should have been awarded. No. 757 seems to have a good turn of speed and now has the problem of getting to the line without being blanketed by the raft-up, or alternatively going to windward of them and starting third behind 413. Down in the south 40, No. 392 has completed her tack and should begin moving, as she is in clear air behind the mess at the line.

PL U S 15 SECONDS: Fifteen seconds after the gun, everyone has started properly except 392. But she is gathering way, and instead of bearing off, should be staying high, passing just to leeward of the pin and hardening up afterward. No. 757 has administered the coup de grace to the fleet and is now a boat length ahead of the opposition. This was primarily ac­ complished by the careful saving of her momentum in wide sweeping turns. The barrier formed by 413 and 75 is felt all the way back in the fleet. No. 75 is partially luffing 413 and preventing her from clearing her air. (Remember No. 1, in our list at the beginning? No. 413 was on time and moving as fast as the conditions would allow, but the boat to leeward of her proved her undoing.) The raft-up seems to be coming apart, but unable to get moving as a result of the blanketing of the 413/75 duo. „ Continued from page 81

ST A R T ! When the gun goes off, No. 413 is coming along nicely, finally having found the air that had been helping 75. No. 75 completes her gybe, but in doing so, has turned rather Plus 25 Seconds FEBRUARY 1976 33 34 FULL SIZE PLANS AVAILABLE - SEE PAGE 94 MODEL BUILDER At last! A flying "Round T U IT !" The "K ille r" Saucer is an exact 22 inch diameter disc. With The designer, Howard "Crash" Evanson, with combat streamer, it looks just like a tadpole, but a little more deadly. "K iller." An attention getter. 'KILLER' SAUCER By HOWARD "CRASH" EVAIMSON . . . The saucer will make your combat competition do a double-take, and while they're doing it, you can C H O P 'E M ! Also a great, attention-getting sport model.

• The flying saucer, “ Killer,” was ori­ or .29 engine. pen to draw all of the rib and spar ginally designed to be a new approach Construction of the saucer is as dif­ locations directly on the disc, both to fast combat. After many enjoyable ferent as its final shape. You’ll need a sides. Note that ribs are perpendicular flights with “ Killer” , I found that, dozen 3/32 x 3 sheets of balsa. Using to the grain direction. although it is as fast as any other com­ the full size plan as a guide, pre-cut as Next, pin disc to flat surface and in­ bat bird, it won’t turn quite as tightly many sheets as required to roughly stall all ribs, spars, and edge molding as the more conventional wing/boom form a 22 inch diameter disc. Butt- pieces on the exposed side. Make sure layout. However, the saucer never fails glue the sheets together, and when dry, that edge molding joints don’t coincide to attract a lot of interest among both establish a center and draw an 11 inch with the disc sheet joints. spectators and other modelers, so I feel radius circle, using a large compass. If Now turn structure over and install this makes up for its “ in the groove” a large compass isn’t available, use a spars, ribs, and molding to opposite flight characteristics. piece of dacron line, a tack, and a pen­ side. After this, add the control system, Please don’t interpret what I ’ve said cil. While you’re at it, you can draw a tank, and engine mounts. The elevator to mean that "Killer” is anything but pattern for the 3/4 inch wide edge on the original was built up, but shown a capable combat machine. It is really molding. as 1/4 inch solid sheet on the plans. To fun to fly, and would also make a fine, After cutting the 22 inch disc to install the 1/16 hinge wire, cut the ele- attention-getting sport flier with a .19 shape, use a soft pencil or bail-point Continued on page 76

The saucer is built up .. . and down, from a center disc of 3/32 balsa Structure complete, and ready for covering. Tough Coverite was sheet. Add ribs and spars to both sides and you're almost there. used on the original. “ Crash" refers to it as "bullet-proof." FEBRUARY 1976 35 Two big reasons for hanging out at the combat circles during the ·75 Nats. Linda Wheeler help­ ed work the pits and caused lots of single-plane crashes. Eat your heart out, Dewey! Photo by Rich "von" Lopez and his Firefly, co-designed by "Fast" Ed Bridant. New Midwest kit is now Tom Southern. TH A N K S, Tom! available. Design published in May 1975 Aeromodeller.

By “DIRTY DAN" RUTHERFORD ontrol line PHOTOS BY THE AUTHOR

• In the October ‘75 issue of MB I out­ worked. So let’s get into this thing a Several months after the ‘74 Nats lined briefly what had happened to a little deeper. were over, someone contacted Jean Senior contestant at the ‘74 Nats. And Here is basically what happened. Pallet, then chairman of the CLCB, ask­ I asked that readers of this column write Carlos Aloise )r. and Carlos Aloise Sr. ing why an obviously illegal plane to me if they wanted to know more or entered Profile Carrier. They compete (Carlos Jr ’s) was allowed to compete in were upset about what happened. The as a team and entered identical planes Profile Carrier. Good question. Jean response was pretty good, although a lit­ . . . Yes, identical. Right down to decided that he better do some check­ tle surprising in that I heard from not having the same AM A numbers! Mis­ ing and one of the people he wrote to only C/L people but F/F and R/C types take No. 1. The senior Carlos had his was Carlos Aloise Jr. No answer. Mis­ as well. All of the letters, except one, AMA number on both his plane and on take No. 3. voiced the opinion that something was his boy’s. Tliis was noticed by some­ Jean brought John Worth into the wrong with the way the problem was body, but the model was allowed as be­ problem who wrote to the Aloises ask- ing legal (the Aloises said that when the planes were built, Carlos jr.’s license wasn’t in effect so they put the father’s numbers on both planes so they would be covered by AM A insurance when test-flying). So Carlos Jr. flew his plane and won Senior Profile Carrier with it. The model was not legal and should not have been allowed in the contest. But it was. Mistake No. 2. The Aloise family cleaned up in Pro­ file Carrier and went home, no doubt to make plans for the ‘75 Nats. Hopefully, some of their plans included getting the right AM A numbers on their planes! Ira Keeler's "Bee-Ware", another fast combat A "Slow Bosta" by Chuck Stevenson, slightly ship posing as a slow. Photo by Lopez. damaged. A Slow disguised as a Fast. Lopez.

36 MODEL BUILDER Sherwood Buckstaff, winner of Open Fast combat at ”75 IMats, chang- Phil Granderson does his one-man-show routine while Lorna Samuel ing engines before final match against Col. Howard Rush. Southern. waits for match with Fred French. Mike Strieter can't believe it! ing that they respond to the first letter. concerning why your model was entered phy, he says there is no cause for con­ And Carlos did. He sent copies of both with the wrong AM A number on it. cern if a satisfactory explanation can be Pallet’s letter and Worth’s letter plus a “ Unfortunately your letter of April given. What if Carlos’ answer was un­ reply of his own, not only to Jean Pailet 4 doesn’t help because it doesn’t an­ satisfactory? And who was to decide if and John Worth, but also to all mem­ swer the basic question concerning the his answer was satisfactory or not? bers of the C LC B and the Executive AM A number on your entry. That’s the Remember, there was no protest, so Council. Carlos’ letter didn’t answer only question we’re asking of you . . . normal channels for protest processing any of the questions posed by Jean Pai­ any other questions are related to other were not being followed. let but did point out that a protest had details of the event. Then, in the last paragraph of the let­ not been filed as specified in the rule "We’re sure you wouldn’t want to ter, Worth threatens Carlos with his book and that he thought Pailet and keep the Nats trophy if you didn’t win 1975 competition status! Play our way Worth were trying to take his trophy it properly, in accordance with the or else, kid, is what Carlos is being told! away and doing it by their own rules. rules. So, if you can give a satisfac­ Should our AM A be run this way? I And he (Carlos) had a good point. In­ tory explanation there should be no don’t think so. deed, what was Big Brother up to now? cause for concern. We are only trying The whole matter was aired at the Didn’t take long to find out and to find out what happened, from you next Executive Council meeting and, as John Worth was the one to provide the rather than what other people have said. I understand it, John Worth was instruc­ answer. Below is Worth’s letter to Car­ "Please reply to the question as soon ted to write a letter of apology to Car­ los. I ’m tempted to only quote parts of as possible, so that this matter can be los. I certainly hope this was done, but the letter but will include all of it so settled soon and, hopefully, without do not know if it was or not. However, there is no misunderstanding on any­ affecting your 1975 competition status. as mentioned in the October column, one’s part. Sincerely, AM A Monthly Mailing No. 102 said, "Dear Carlos, John Worth” “ Previous Contest Board and HQ ac­ "The purpose of my March 27 let­ Now that made things pretty clear. tions were upheld," when referring to ter and the earlier one of Jan. 29 from Check the third paragraph of that let­ the incident with Carlos. Hah! The C LC B Chairman, is simply to determine ter. Worth not only suggests that Executive Council tells Worth he did the facts concerning your entry in the Carlos wouldn’t want to keep the tro­ Continued on page 82 Carrier event at the ‘74 Nats. It’s a mat­ ter more basic than any protest . . . we’re seeking your side of the story

Jim Parsons, Seattle stunt freak, and his Ster­ C/L Editor found this Boeing P-26 "Peashooter" hanging in a hobby shop. Built over 17 years ling Spitfire, lightened somewhat. "D irty " pic. ago by Gill Greedy, Lacey, Washington. Good as new. Ohlsson 23 on glow. Photo by DD. FEBRUARY 1976 37 -MID­

AMERICAN EAGLE EAGLET” By TOM LAURIE . . . Our Plane-on-the-Cover was originally designed for the old, 48” minimum span Jumbo Scale rules. Now it is a fine airframe for the VL electric motor. Build it to fit your fancy.

• The American Eagle “ Eaglet” was originally powered by a Cleone twenty performance and many construction de­ designed and manufactured by the six horespower engine, and later by tails of the "Eaglet". The three-view is American Eagle Aircraft Company, lo­ Szekley engines of thirty to forty five of exceptional quality, and it includes a cated at Fairfax Airport in Kansas City, horsepower. Approximately sixty seven color scheme and license number of a Missouri, in the 1930 period. The of the “ Eaglets” were built through particular “ Eaglet” which I chose for “ Eaglet” came about largely due to the July of 1931. The "Eaglet” could be my model. The scale locations of the depression of that period, when Ameri­ purchased for $250 down and the re­ wing ribs and empennage structure can Eagle Aircraft was finding it very mainder financed over twenty four members are shown, and were followed difficult to sell its more expensive bi­ months. This version of the “ Eaglet” on the model. Also, considerable de­ planes (Yea, WCN, that was the reason). was the Model 230. The next version, tail on the cowling sections and attach­ Ed Porterfield, the president of powered by the Szekley 45 horsepower ments around the engine are shown. American Eagle Aircraft, asked his en­ engine, was designated the B-31, and The source of the three-view was Don gineering staff to come up with an air­ is the subject modeled in this article. Pratt’s fine article on the American plane design that could be sold for The three-view drawing which I used Eagle Airplanes in an early issue of about one thousand dollars. The con­ contains all significant specifications, Sport Flying Magazine. A good copy of figuration selected by Porterfield was the "Eaglet” , which was the "brain­ child” of Noel Hockaday, who had joined American Eagle when they ac­ quired the Wallace Aircraft Company. The "Eaglet” was an ultra-light, four hundred and sixty seven pound, open cockpit, parasol monoplane. It was

The author/designer "winds" voltage into the Close-up of nose. The Szekely engine was built from modified 1-1/2 inch scale Wms. Bros. Eaglet's electric power supply before flight. LeRhone cylinders. Mini Robert Hinge Points used for strut attachments.

38 MODEL BUILDER V L electric motor whirring softly, the American Eagle "Eaglet" takes off for another realistic flight. Model is a little large for the V L Hytork motor, but the moderate climb makes the flight more life-like. the American Eagle insigna is shown on a model the size of the “ Eaglet", how­ sight to see. the three-view and fits the model per­ ever, it results in very realistic, scale­ CONSTRUCTION fectly. like flights (The scale speed of a forty- The model construction is of conven­ I originally selected the “ Eaglet” as a eight inch span model of the “ Eaglet” is tional scale model building. The wing subject for the Flightmasters jumbo approximately ten MPH). attachment is a little unique in that it Scale Event. It has beautiful propor­ The "Eaglet” took second place in a uses “ Mini Robart Hinge Points” to at­ tions for a flying scale model . . . good Free Flight Scale Contest for electric tach the wing struts to the fuselage and aspect ratio wing, long fuselage, nice power, sponsored by the Flightmasters, wing. These hinges are normally used to sized tail surfaces (I enlarged the hori­ this past summer at Mile Square Park. hinge surfaces on RC models. They per­ zontal tail approximately 10%), a land­ It was judged first in scale points. As mit easy wing removal when you want it ing gear which lends itself to good previously stated, the flights are most and they come apart rather easy in a shock absorbing qualities, and good pro­ realistic, and the takeoffs a beautiful crash situation, thereby saving the peller clearance if you are building a rubber version. I used an opaque projector to enlarge the three-view drawing to the 48 inch wing span. The opaque projector re­ duces the plan enlargement from a lengthy, tedious job down to approxi­ mately a one hour job. The three-view was enlarged by a factor of 6.86 to ob­ tain the forty eight inch wing span, so this would have required the use of a calculator for each measurement and the expenditure of an awful lot of time. I have found the projector very useful in selecting a subject for modeling, just slip a three-view in the projector and you can see in an instant what your sub­ ject looks like full size. (We'llpublish an article on building this projector .. . The Eaglet was first built for rubber power. The prop barely shows in this framework photo. i f our readers ask for it. H int! wen) Both rubber and electric power systems are detailed on the drawing. The “ Eaglet” was initially powered by rubber because of the Flightmasters’ Jumbo Scale Rules, which require rub­ ber power. I later converted to electric power. Both versions are shown on the plans, however, the electric powered version is the primary version shown on the plans. I used the V L Products, VO-101 Electric Flight System, which features the Hytork 48 Motor with a planetary gearbox driving the propeller at a re­ duced RPM. The system includes a three-cell “ fast charge” battery, a switch incorporating a charge plug, and a field charger. The field charger uses a twelve volt wet-cell battery, a five-minute timer, a rheostat to control charge rate, and a meter to indicate the charge rate. The V L Motor is somewhat marginal for Plan view photo shows the fine aerodynamic layout for free flight afforded by the parasol des­ ign. Only changes from scale include a smidge of dihedral and slightly enlarged stab.

FEBRUARY 1976 39

Μ 6" --- AMERICAN EAGLE AIRCRAFT CO FAIRFAX AIRPORT KANSAS CITY. KANSAS

Specifications: 34'6" SPAN . . . . 2V6" LENGTH . . . 467 lbs. EMPTY WEIGHT 867 lbs. GROSS WEIGHT ONE CREW . . . ONE PASSENGERS . One Performance: HIGH SPEED 80 mph CRUISE . . . 70 mph STALLING SPEED 34 mph RATE OF CLIMB 600 fpm SERVICE CEILING 10.000 feet RANGE . . . 225 miles FUEL LOAD . . 8.5 gal.

Construction: FUSELAGE, welded steel tube space frame, fabric covered. Open cock­ pit parasol design, with tandem seating for two, dual controls. One set of instruments installed which includes altimeter, tachometer, oil pressure Ä temperature. The gaso­ line guage is a float & indicator at­ tached to the gas tank cap. TAIL GROUP, welded steel tube, wire braced, fabric covered. WINGS, spruce beam spars, spruce truss ribs, spruce compression mem­ bers, wire drag bracing internally, strut braced externally, fabric cov­ ered.

COLOR SCHEME of this particular "Eaglet'

Stearman-Porterfield Red on a ll surfaces, wires & struts. A ll numbers & letters are cream-yellow. Engine & tires are black & prop is natural wood with brass edge armor.

42 Scale views courtesy of SPORT FLYING magazine. MODEL BUILDER model from severe damage. the plan view, assemble the two sides The wing attachment to the fuselage with the upper longerons down, since uses a small dowel which passes through they are straight. The fuselage is a con­ holes in each spar, and through loops in stant width in the area beneath the the music wire struts. A rubber band wing, so start by gluing the cross pieces holds the wing in place. in this area. After this part is partially The tail surfaces were hinged with dry, cut the longerons (outside only) soft wire at the outset, but were soon and align over the plans. Add the re­ glued in solid, as I was forever loosing maining cross pieces and the fuselage is tail surface adjustment. The thrust line now ready for the upper fairings, nose of the electric motor is easily adjusted, blocks, landing gear, and the wing sup­ and shifting the battery provides all the port struts. adjustments necessary for balancing. Glue the formers “ C ” through “ J ” to Let’s start construction of the model the top side of the fuselage. Cover the with the wing. The rib spacing is scale. area between formers “ C ” and “ D " The uneven spacing is from the three- with 1/16 sheet balsa. Add the stringers view and not the result of “ weak eyes” between “ E ” and " J ” to the top side of on the part of a tired old draftsman. the fuselage. The stringers have a slight Select good, straight-grained balsa for curve between formers “ E ” and “ F ” . Underside of nose reveals V L switch and the spars, leading edge, and trailing edge charging socket. Trexler wheels. Add the aft cockpit fairing which is sheets, as the wing depends on these made from 1/32 sheet balsa. members for its stiffness. laminated by the method used on the The wing support structure should I used a hinged plywood board, wing tips. They are made from four be added on. Bend the supports from blocked up at each end to the correct pieces of 1/32 x 1/8 inch basswood. .031 music wire to the configuration on dihedral angle, for assembly of the Spars and ribs are as noted on the draw­ the drawing. The loops that hold the wings. This method allows complete as­ ing. Finish the surfaces by sanding wing-attach dowels can be formed by sembly of the wing in one piece before smooth and again taking the time to re­ putting a piece of .045 music wire in a removing it from the jig. Approxi­ glue all joints. vise and wrapping the .031 wire around mately two degrees of washout should The fuselage longerons and uprights it. It should fit the dowel rather snug- be built into each panel. The location are cut from very hard 1 /8 square balsa. gly due to spring-back. Care must be of the blocks for this purpose is shown Assemble the two sides in the usual taken in forming these parts, as they de­ on the plan. manner, one on top of the other. Using termine the wing angle of incidence. The wing tips are laminated from The struts are faired to a streamlined 1/32 X 3/16 inch basswood, bent a- shape using 3/32 x 3/16 hard balsa, round a plywood form. Soak the wood notched slightly to receive the strut pieces (four required for each tip) and wire. Attach to the fuselage by glue­ "stretch around” the form. Hold in ing and wrapping with thread. place with pins until dry. Remove from The nose structure is added next. the form and coat with thinned-out Cut former “ A ” and the two “ B ” for­ white glue and return to form for dry­ mers from plywood. Lightly glue the ing. two nose blocks and the “ B ” formers to The wing assembly is completed with the fuselage and cut to shape, using the addition of the dihedral braces and the formers to control the contour. Re­ balsa blocks at the wing strut locations. move these parts from the fuselage and Drill 1/16 diameter holes through the hollow the nose blocks to the outlines spars at the wing center-line for the shown on the plans. Glue the rear for­ wing attachment, and at each of strut mer “ B ” to the rear block and glue this locations. Sand the wing smooth and assembly to the fuselage. Drill holes for take the time to coat all joints with glue the 1/16 dowel and the sheet metal re­ again before setting it aside. taining screw in the two “ B " bulkheads. The stabilizer and elevator is con­ Now assemble the nose block and the structed in one piece and the fin and Wing is joined at cabane struts. Cover plate two formers. hides joint. V L prop painted brown grained. rudder in one piece. The outlines are Continued on page 66

Three-quarter rear view accents long tail moment which provides excellent stability. Tail surface outlines are made from four laminations of 1/32 by 1/8 basswood strips. Photo taken at Orange County Airport, home of TallMantz Air Museum.

FEBRUARY 1976 43 A rare Boeing Model 202 (XP-15) to 3/4 inch scale, by Bob Gable.

FREE FLIGHT SCALE By FERNANDO RAMOS

• Jumbo Rubber Scale started out building and flying Peanuts than the planes and 30 inches for biplanes. Well, about seven years ago as an event for Jumbo size. folks, I think that the solution has been models with a minimum wingspan of 48 The rules were changed in order to hit upon! This past Jumbo event was inches. There was one more require­ get more appeal. With a three minute the best ever in the history of the con­ ment . . . each model must have some max, the minimum detailed models test. There were more entries, a more kind of pilot. A three minute max was were always winning. The more serious diversified cross-section of models, and set, so it was easy to see that any model scale modeler didn’t go for this, there­ the number of spectators was outstand­ that could fly for three minutes wasn't fore there was a rules change so that ing. going to be to scale! Most modelers flight points could not exceed the scale The date of the Flightmasters end-of- used some kind of old timer plan which points. The models still had to have a year Pcanut/Jumbo Contest was Decem­ was readily available from John Pond. pilot and a minimum wingspan of 48 ber 7th. I sure hate to boast about the The two first contests were considered inches. This change helped matters letter-perfect weather we usually get for extremely successful, because of the along for at least one more contest. contests, but it is true! Here it is number of entries involved. Much nos- The interest in Jumbo was still waning. December, and there are many areas stalgia was generated as these huge birds My personal reason for believing that that are cold, snowy or raining, but for­ took to the air . . . ah, shades of the there was a problem was that is was tunately, here in Orange County, we 1930’s! However, as time went along, just too costly to build and fly the big have short-sleeved weather. There were the number of entries dropped. So, in models. Most modelers weren’t willing twelve Jumbo models entered, even order to stimulate more interest, a pea­ to use their life-time supply of Pirelli in though there were at least six others nut event was suggested to go along one big motor. that didn’t qualify for one reason or an­ with the Jumbo. Spectators could then Something had to be done in order other. Two of the qualifiers were bi­ see the two extremes in rubber scale. for Jumbo Rubber Scale to survive. It planes. One of these bipes belonged to It was a good thought. The only prob­ was suggested that the minimum span Andy Faykun. It was a Tiger Moth, and lem was that more modelers took to be dropped to 36 inches for mono­ he was able to place third overall against

Jim Dean's fleet of rubber scale ships. Peanut Corben Ace, Jumbo Corben and Curtiss SOC-3. Ray Berens' Skyfarer in flight. It's a double­ New Jumbo rules call for 36" minimum span monoplanes, and 30" min. biplanes. size from old Stahl MAN plans. MB's is 30".

44 MODEL BUILDER Andy Faykun's Tiger Moth placed a respectable 3rd place in the Walt Mooney's spry little (but big enough for Jumbo scale) Aero 101. recent Flightmasters' Jumbo scale meet. Ship will be a construction article feature very soon. some rather tough competition. His This month I have quite a bit of mis­ will get rivets like you wouldn’t believe! best time was 60 seconds, which isn’t cellaneous information that I hope you Naturally, you have to adjust the card- too bad for a 30 inch biplane. Walt Mo­ can use. Scotch Brand Tapes (3M Co.) stock to fit the rivet detail you want. oney had the other biplane, that of an has a metalized tape that can easily be The advantage of using an electric type­ unusual Aero 101. (An up-coming MB useful for simulating metal panels on writer over the conventional kind, is construction feature, wen) anything from peanuts to gas jobs. It that you can regulate the key pressure One of the most impressive models has a very shiny surface which can be for rivet uniformity. (Incidently, one was that of John Oldenkamp, a model rubbed with very fine steel wool to dull super material which can be used for of the Farman Moustique. The all blue it down. I prefer to spray it with Liqua- this purpose, and several others, is Stra­ model was extremely light and flew in Plate after rubbing it down with the thmore board. This material comes in a very large circles, never exceeding about fine steel wool. This is done, of course, variety of thicknesses, and even the very 10 feet in height. Its best time was 50 in order to get good paint adhesion. thinnest is made up of several lamina­ seconds. I think if John had really This metalized tape can’t be used tions. It isn’t cheap, but it can be wanted to, he could have added more over compound curves. However, it is found in art supply stores.) power and set it aloft for more height super where straight curves or flat me­ One point to remember is that on a and duration. Jim McMahan, who was talized panels are needed. Also, by lot of aircraft, particularly WW II, the the eventual winner, had a terrific mo­ placing the tape over a piece of soft rivets are flush rivets. That is, the heads del of the Pilatus Porter. It had the pine (sticky side up) and using a small do not stick above the surface. Too best pilot of all the entries, and it flew blunt-tipped tool, like a ball point pen, often modelers disregard this. If a like a Wakefield model. Its best time you can make rivet detail. Just press Continued on page 82 was 80 seconds, and its scale score was the point down carefully, with just 78. I ’d say that is a pretty good balance enough pressure to make the right im­ between scale and flying. pression. Too much pressure will poke Walt Mooney also entered a mono­ through the tape. This system isn’t re­ plane, a rarely modeled Cessna EG 2. stricted to the metalized tape, but His best time with this black and red works well with cardstock also. This tape model was 46 seconds. Second place weighs only .1 grams per square inch went to Mike Mulligan, flying an Aer- and is .0025 in thickness. The size that macchi A L 60. This model put up I have is 2 inches wide and I don’t know some expectional flights, with its best whether it is available in other widths being 74 seconds. These times are ex­ or not. The stock number that is in­ cellent, considering that these are good scribed in my roll is No. 850 PAU size scale models. Next year we are 0548X. looking forward to another great Jumbo While still on the subject of simu­ Scale Rubber Contest with even more lating riveting, another way to do this is entries, and also with the possibility of by using an electric typewriter. Place George James and his Pilatus Porter. Another having a separate event for the biplanes. some very thin cardstock into the type­ Pilatus by Jim McMahan was 1st in Jumbo. More on this later. writer and push on the period key. You

Putt, putt, putt . . . Marlin Alpert's Longster bears down on our F/F Scale Editor. Jumbo meet Don Eggensperger's Fairchild 22 met old 48" at Mile Square, Fountain Valley, California, brought out a lot of great rubber scale ships. span rules. Flew very realistically.

FEBRUARY 1976 45 Cox powered free flight contrarotating rotor autogiro, by Bob Brown, England.

STAR SKIPPERS This is the name of a unique news­ letter published by Richard and Ed Whitten, P.O. Box 176, Wall Street Sta­ tion, New York, N.Y. 10005. After a • We start our column off on a sad frequently work on four or five pro­ lapse of time, the publication is back note this month; Harold Swanson, pro­ jects at a time, switching back and forth again, featuring model plans and tips for prietor of Modernistic Models, has pas­ as required to ensure simultaneous pro­ the junior-age model builders. Also sed away. This active member of the gress. We shall all miss him. featured are postal contests aimed es­ Flightmasters was a model builder for Hal’s model plan business was devel­ pecially at flyers through the age of 15 most of his life, having taken interest as oped over a period of years, and his years. Complimentary copies of the a youngster, when ill health prevented mother would like to see it continued. ST A R S K IP P E R are sent to all event him from pursuing more vigorous forms Any interested readers may contact her participants, and subscriptions are avail­ of activity. Hal liked A L L forms of for more details: able (eight issues) for $2.00. models, from plastic display types Mrs. Ruth Swanson THE PART MODELS PLAY through complex build-up types. His 5253 Corteen Place No. 10 Why models? Apart from educa- zeal for building was such that he would North Hollywood, California 91607 Continued on page 69

Hank Fasola, owner of Vista Labs, with a V L (natch!) powered Another twin-rotor autogiro by Bob Brown. This free flight model "Electro-Kite" free flight model. Photo by Joel Rieman. looks much like Skip Ruff's R/C model (plans in April *75 M B).

Farman Moustique Jumbo rubber scale in foreground, and Farman "D avid" bipe, also rubber Don't worry about wrinkles and warps in your powered. Excellent aircraft .. . and photo, by John Oldenkamp, San Diego, California. scale ships! Tiger Moth in R .A .F. Museum.

46 MODEL BUILDER

"Mystery Modeler" is an ex-well known FAI FEBRUARY'S MYSTERY MODEL F/F Champs competitor. Can you name him? throw will not do the trick, unless ship and waiting for IN A V to arrive, useful, and provide a rule of thumb for breaking something is what you intend. drop a letter to Micro-X Indoor Model use: Save this method for the more sturdily- Supplies, 5200 Seven Pines Dr., Lorain, 1. A glider should only be heavy built ships and the larger sites. Ohio 44053. Proprietor Gerald Skrjanc enough to be thrown to the ceil­ has all kinds of interesting goodies listed While on the subject of indoor build­ ing when you give it full effort. in the Micro-X catalogue, from 1/100 ing and flying, there is a fascinating 2. A glider should be able to be trim­ thick balsa sheet to complete indoor med to glide in as large a circle as world of free flight available to you by kits. Pirelli rubber is available, sliced in the flying site will allow. Tight just giving it a try. Sites are usually nearly any thickness you can imagine turning decreases flight time . . . more available for indoor than for out­ . . . 25 cents will get you the catalog. the wider the circle, the longer door free flight. Any gymnasium will the ship will stay in the air. do. The best ones to look for, if you BEGINNING HAND LAUNCH GLIDER 3. Good recovery is important. Us­ have a choice, are those which have the I would like to take a moment out of ually this is accomplished by a highest, unobstructed ceiling, and a this column to editorialize just a bit a- fairly forward center of gravity or wide floor area. Of these recommenda­ bout the advice given to beginners to a spiral climb. In small gyms with tions, the unobstructed ceiling is pro­ build and fly hand launch gliders. low ceilings (35 feet or less), the bably the most important. There is some kind of logic which climb and glide are usually in the When you’re not busy looking a- seems to equate simplicity with begin­ same direction, as in this month's round for the site, drop a line and a ners. The hand launch glider is essen­ 3-view. As ceiling heights in­ check for $3.50 to the National Indoor tially a simple device for flying. It is, crease, the trim can change to a Model Airplane Society (NIM AS), for a however, not a simple device to fly. I more conventional right climb, subscription to Indoor News and Views, have seen many youngsters and begin­ left glide pattern. This ceiling Box 545, Richardson, TX. 75080. This ners throwing hand launch gliders all height break-off point is some­ newsletter is the best and most compre­ over the place . . . usually into the where between 35 and 50 feet, hensive source of information about the ground, because someone has recom­ depending upon the site. In a indoor scene. Featuring plans, 3-views, mended such a starting point. very high site, 60 feet or more, hints and tips, and contests . . . up­ Hand launch gliders are notoriously the times will usually increase coming and past, N IM AS also has avail­ tricky to launch. The usual beginner’s with a right-left pattern, just as in able some excellent how-to-do it slide pattern is a strong vertical launch, fol­ outdoor hand launch glider. presentations on how to make and at­ lowed by a 180 degree transition and a Flying the Fluf-Duf should be such tach microfilm. Other slides on similar fast vertical dive. This is not only dam­ that the launch actually is a high over­ and informative indoor topics are avail­ aging to the model, but doesn’t do won­ head throw which is banked to the right able. Drop them a letter . . . and a ders for the ego of the builder-flyer. so that the model is arched into its glide check. Some of the old M&P kits . . . now be­ pattern. A full-bore, baseball-type While you’re plotting that indoor ing made and sold by American Balsa

DARNED GOOD AIRFOIL - BENEDEK B-6456-f

NOSE RADIUS 0.7

STATION 0 1.25 2.5 5 7.5 10 15 20 25 30 40 50 60 70 80 90 95 100

UPPER 0.75 2.5 3.6 4.95 6 6.9 8 8.7 8.95 9 8.9 8.3 7.5 6.4 5.05 3.7 2.6 0.5

LOWER 0.75 0 0.2 0.5 0.8 1.1 1.6 2.2 2.8 3.25 4 4.5 4.5 4.05 3.3 2 1.1 0

FEBRUARY 1976 51 FIN 1/64" " B " or "C " grain- warp-in warp-in slight right rudder (35' ceiling) Category I record holder total2-flight — 1:19.1 handers, handers, left wing panel and left side of stab stab should be the longer as noted above. Stab tilt, wing, and rudder warp opposite of that shown. Adjust for left/left pattern. TR IM — Right/Right for right handers. For left FLUF-DUF" BY DAN BELIEF 3/32" camber (approx.) Total length of fuselage — 163/4 Q0 _ £ Model Weight 5 — gram (0.18 oz.) Lead strip Nose weight FUSELAGE3/32" and medium PYLON " B " grain low ceiling (25 ft. or so) contends Mr. Hainer. NOTE: A modification is to by move suggested wing Phil and pylon Hainer assembly 3/4" to 7/8 forward of that shown. of fuselage. Also, mount Arrangement stab on better top suited for very

σι ΙΌ MODEL BUILDER Corp . . . have the right instructions for the beginner and are safe bets. Especial­ ly recommended are the “ U.S. Kid” and “ Flash". So, a word to the beginner. If you are just getting started in free flight, stay away from outdoor hand launch gliders, unless you’ve got someone who can help you, or unless you are willing to have a few ego-deflating experiences. You can forestall this ego-deflation, or maybe bypass it, altogether, if you follow this advice: 1. Build the model from a good kit. I strongly recommend the “ U.S! Kid”. Build it exactly, and I mean exactly, as shown and de­ scribed on the plans. Landing gear sandwiched between 3 pieces of Landing skid mounted behind engine pan (ST 1/16 sheet metal. Wire bent to match cutout type). Ring held in place by mounting bolts 2. When it is built and finished, in center piece. All epoxied and bolted tight. for pan. Note set screw. make sure it balances exactly as shown. 3. Warp in a bit of left rudder turn (1/32 to 1/16 is usually suffi­ cient). 4. Warp in a bit of wash-in in the right main panel of the wing . . . trailing edge down about 1/32 at the polyhedral break. Now, you’re ready to launch it. Do not throw the model straight up. It should be banked to the right and made to spiral up in a right hand circle. If it doesn’t, practice the throw until you get it to spiral to the right. Throw it with all of your strength, just as you would pitch a baseball. When you can get the spiral climb correct, the next thing to work on is the transition to glide. This should be a figure “ S ” turn from right climb to left glide. No loss in altitude should be no­ ticed. The glide should be flat and in Landing skid built into the fuselage. Skid is firmly anchored in fuselage, and small plate of metal wide circles, with no indication of spin- is fastened to bottom where wire exits, to prevent fuselage damage when skid bends. ing-in. Adjust stab incidence by breathing ON THE SUBJECT OF by sandwiching these skids between the on the trailing edge and bending it in LANDING SKIDS plys of a firewall. Didn’t work . . . the the correct direction. This will flatten It’s been my experience over the past skid would eventually pry the plys a- out the glide. Spinning-in can be cor­ 17 years of contest-going that what part and the firewall would fall off. Al­ rected by reducing the amount of rud­ some of us take for granted as standard though the light-weight 1/2A model der offset. Glide turn can be induced operating procedure is, in fact, a revela­ wasn’t a problem, any ship which had by stab tilt. Transitions can be im­ tion for others. more weight could be a pain. Tried all proved by moving the c.g. forward or Such an item would be the subject of different kinds of skid mountings, until by varying the launch angle or speed. landing skids on power models. I began the locals came up with the set-screw method. The accompanying pictures pretty well tell the story. The secret is simply to fashion a piece of sheet metal so that it matches the engine mount. The metal should be thick enough to be drilled to accept the skid wire. I use 3/16 sheet metal for all 3/32 and 1/8 diameter skids. The metal can be drilled out and lightened nearly as much as you want. All that needs to remain is enough metal to hold the skid and the set screw, plus the outline.. Made from aluminum or magnesium, these weigh in the neighborhood of 3 to 5 grams. On the larger models, this weight is negligible when compared to the absence of the landing gear problem. I make mine with no special tools Three skids shown in different mounting rings. Landing skid and pan. Most pans have space other than an electric drill, hacksaw and Note set screw in ring behind Kraft mount. at back to drill and tap for skid attachment. Continued on page 82

FEBRUARY 1976 53 The "Fuel Blipper" is a piece of 1/20 wire bent as shown, and inserted in holes drilled in the Roll the pacifier on a piece of 1/4 inch tube motor mount. It captivates the fuel line for easy "pinch control" during starting procedure. to reduce its site for Half-A engines.

"PACIFIER” F/F FUEL SYSTEM By BILL HUNTER . . . This article is being published as a favor to the author, who is continually being asked about the care and feeding of "Pacifier" fuel systems. Straight info from our best known Satellite!

There are many advantages in the use valid complaint, but like anything new, After filling pacifier, pinch fuel line of a pacifier pressure system. Easy in­ it takes a little getting used to. I am firmly and close timer. Connect line to stallation, light weight, no engine cut­ not going to attempt to convince any­ engine. (A “ pinch-off” timer is recom­ out at launch, and a general increase in one that they should switch fuel sys­ mended as opposed to a “ flood-off” for RPM. tems, but I will say that in my opinion, this first attempt). Close needle valve The most common complaint heard pacifier pressure is the only way to go, and then open 2-1/2 turns. Hold fuse­ from modellers concerning the use of a and it is well worth the effort to get lage in starting position with one finger pacifier system has to do with hard used to. pinching fuel line, and open timer. A starting due to easy flooding. This is a PR O C ED U R E: Starting the first time. quick check of needle valve setting can be made (in the case of a Cox .049 - .051) by putting piston at top dead cen­ ter, look into venturi and release finger pressure on fuel line. Venturi should fill to the top in about two seconds. If not, open or close needle valve accord­ ingly and try again. With a .40 size engine, follow the same procedure, adjusting the needle valve for a flow of about 4 drops per second. Close timer and dump excess fuel. Now you are ready to start. With bat­ tery leads connected, hold fuselage in Pacifier is mounted on a nozzle, made up of 1/8 and 5/32 O.D. brass tubing. Fuel tubing is added starting position, with fuel line pinched to the pacifier end of nozzle, then neck is bound over nozzle and tubing with a rubber band. Continued on page 67

Pacifier can be mounted in small wire clip which is bound and Another mounting method uses a piece of 1/16 aluminum sheet, soldered to landing gear leg. Outside rigging is handiest. cut as shown, and fastened to the rear plate of engine mount.

54 MODEL BUILDER The ready-to-run Jerobee Comando 1/12 scale car with "V ette" body, and the two-channel Transmitter with back removed. Note dry cell radio transmitter (steering and throttle/brake). power and plug-in changeable frequency xtal. PRODUCTS IN USE JoMac Products' 1/12 Scale JEROBEE RACE CAR, by Taylor Collins.

The Jerobee Comando 1/12 scale two ounce Pylon clunk tank is used to proved to be reliable and easy to use. race car is the high performance, racing provide longer running time than would A squirt of fuel in the exhaust port and version of the popular Jerobee Challen­ the stock Babe Bee tank. The Babe Bee a few gentle tugs on the starter gets the ger R/C car. The Comando, which single port cylinder is replaced with a engine running consistently. The ex­ comes fully assembled, ready to race, two port Tee-Dee type unit. haust restriction throttle provides a uses a two channel digital proportional The recoil, lawn mower type starter very smooth idle, which is well below radio system to operate steering and the engaging speed for the centrifugal coupled throttle and brakes. clutch. The radio system operates on a No. The independent front suspension 276 dry cell battery in the transmitter, makes the Comando handle its speed and uses four AA alkaline pen cells to quite well. The steering servo is pro­ run the receiver/servo brick. The trans­ tected from shock damage by a ‘Z ’ mitter has a spring-centered steering bend in the wire pushrod. Centering wheel with trim control, as well as a adjustments to the steering can be made ‘deadman’ type, spring loaded throttle. by extending or compressing this bend. The telescoping transmitter antenna is A band-type brake grabs the clutch angled up and to the left, making opera­ housing at low throttle settings, bring­ tion of the controls easy for a right ing the car to a smooth, but sudden handed person . . . but a southpaw may halt. have some difficulties if he wants to op­ The colored, vacuum formed body, erate the steering with his left hand. attaches to the nylon mounting posts The car is powered by a modified with two spring steel clips. The body Cox Babe Bee .049 engine. The stock is easy to install after the engine is Tun­ tank has been drilled out in Swiss Vrooom! You better be sharp on steering be­ ing. cheese fashion to save weight, and a for you jam on full throttle! It mogates! Continued on page 89

All the works are exposed with body removed. Radio batteries sit on top of receiver/servo case. You'll need fuel and starting battery to get Side-mounted fuel bottle feeds engine thru filter. Pull-starter just above flywheel. under way. Can be run without body. FEBRUARY 1976 55 Paul Plecan's "Gas Flea," built by Alvin Hagen, Belton, Missouri. He Buccaneer " C " Special, by George Dickenson, Somerville , N.J. Uses built one in 1939, and "just had to do it again." Arden engine. O&R .60 with bonded ignition for Kraft 3*channel.

p m S P A R K S By JOHN POND

ing the chairman of the K.S.A.K. I N “ Flygning” . The contest was attended by the Swedish Princes, Bertil and Carl- (Royal Swedish Aero Club), the model • This column has dealt primarily with )ohan, who were pleased to see the committee that represents all modeling old timer activities and developments in winning flights of 8, 12, and 8 seconds. for Sweden. the USA, and has had only passing re­ In those days, distance contests were With the formation of this very ferences to activities abroad. It was also held, in this case the winning dis­ active club, the Swedes began to ac­ indeed with pleasure that a letter was tances were 58, 88, and 59 meters. tively participate in the Wakefield Tro­ received from Sven-Olen Linder of Öre­ Model aviation still lagged and pro­ phy Event as early as 1937, placing bro, Sweden, with a most interesting gress was slow until Sven Wentzel and sixth and eighth. Some contestants felt history of modelling in that country. several other active modelers formed Wentzel won that year but had one of To the writer’s best knowledge, this is the Vingarna (Wings) Club in 1935. his flights disqualified for “ pushing” something that has not been printed in Wentzel later set up a model shop and the model on takeoff. American magazines and is well worth also went into model kit manufac­ In 1938, the first Nordic Glider preserving in this column. turing. So successful was Wentzel that Competition was held, with the Swe­ Modeling started very slowly in Swe­ the firm has survived and his sons still dish team taking top honors. While on den, with the earliest reports having run the largest modeling agency in Swe­ this winning streak, the Swedes took in model aviation starting in 1913 with a den. the Wakefield Finals in France, with few scattered modelers. It was not until Sune Stark, Wakefield world cham­ Gunnar Magnusson placing third. The 1921 that model flying gained national pion in 1951, was another of the ori­ following year in Belgium, Magnusson prominence with a model contest spon­ ginators of the Wings Club. Stark has won the Coupe de Belgique. Not to be sored by the Swedish magazine, maintained his interest in modeling, be­ outdone by a fellow club member, Sune Stark won the first Swedish champion­ ships in 1938. Modeling really got a shot in the arm

The 1937 Swedish Wakefield team (I to r): Sven Wentzel, Bjorn Andersson, Sune Stark, Olle IM. O. Gustavsson won Swedish O.T. Champs Lindhoch, and Ake Roggentin. with this Korda Wakefield. 56 MODEL BUILDER Note the cold weather gear worn by prolific Washington builder. Some guys never learn (See last month's col.). Erie Morehead paid Nick Rankin. Playboy .020 Replica at CAM S 1st Annual, Idaho. another S10.00 to Al Grell. That's a Lanzo Record Breaker, Erie. when the Swedish government decided bro, Sweden. This newsletter is almost ments. As Bunch had proven it before to sponsor model aviation during the magazine size, with drawings, articles, the war, there was a definite demand war years. From the beginnings of the cartoons. Even if you can’t read Swe­ for a .46 cu. in. motor. Vingarna Club, modeling expanded to dish, you’ll enjoy it! In those lush years right after World 40,000 members in two years! Of ENGINE OF THE MONTH War II, when everyone had saved their course, after the war, the money dried This month’s engine is the postwar money for four years, any manufac­ up, but the action had been set in mo­ version of the May Co. Silver Rocket, turer who had a half-way decent run­ tion. A Swedish merchant, Osvald Ar- which was first advertised in the July ning motor, enjoyed a successful series nulf-Olsson, of Gothenburg, put up the 1945 issue of Model Airplane News. of sales years. As 1948 approached, Swedish Glider Cup, an equivalent type Called the Rocket Victor Motor, the en­ things started to tighten up, and it was trophy to Wakefield, for A/2 gliders. gine was listed at $22.50 in a rather mo­ then that the Ohlsson & Rice firm de­ cided to drastically drop the price of its Sweden has had its share of successes. dest initial advertisement. 60 motor from $18.50 to $9.95. Wakefield saw Sune Stark, Arne Blom­ Corr’s Hobby Shop, in Washington, With the tremendous number of gren, and Lennart Pettersson win firsts, D.C., carried a steady ad for this motor along with two team victories. In gas, in its hobby parts advertising page. As automatic screw machines, lathers, etc., Rolf Hagel, a prominent flyer of long sales increased, the Corporate Products accumulated during the war, it was sim­ standing, was a joint champ in 1959, Inc., jumped to full page advertise­ ply a case of the big production com- a champion in 1971, and this year, 1975, Lars Olofsson won the FA I Po­ wer Class. The Swedish counterpart of Ameri­ ca’s Academy of Model Aeronautics (AM A) is the Swedish Model Flying As­ sociation (Svenska Modell Flyg Forbun­ det). Of interest is the fact that it re­ ceives some economic support from the Board of Education for youths of 7 to 24 years of age. The official modeling organ is "Modellflygntt,” issued by SM FF six times a year. As with AMA, they derive their other incomes from membership fees, contest fees, lotteries (!), and donations. At present, the S M FF membership is 5,000, with the primary interest being R/C and F/F. At present, a small group interested in indoor flying is trying to develop enough interest to hold an elimination for a possible indoor team to represent Sweden at the Indoor World Champion­ ships. Old Timer activity is quite heavy in Sweden, with most of the flying being rubber and glider types, as ignition mo­ tors are quite scarce. The largest club (over 40 members), "Oldtimer-Sallska- pet” , that flies old time models, also puts out a 32 page Newsletter called “Old Timer” . Edited bySven-olov Lin­ den, exchanges can be made by writing to Sven at Hovstavagen 15, 70763 Öre­ ROCKET Drawn by TEX NEWMAN

FEBRUARY 1976 57

Wanna buy a duck? No, it's Guy Kirkwood, not Joe Penner! Guy was MB's intrepid F/F Editor, Bob Stalick, releases his erratic Wedgy. trying to unload this ancient Thor at SAM Champs. No takers? Terrific glide compensates. CAM S Annual, Cour d'Alene, Idaho. panies squeezing out the smaller com­ petitor. Along with the Pierce, Everson, et al, the Rocket suffered the same fate as the myriad of engines on the mar­ ket, i.e., falling off of sales. Eventually, the Rocket motor production was dis­ continued. Rocket motors are surprisingly good running engines. Most modelers make the mistake of putting a .46 size motor, such as the Rocket, in a model designed for a .60. When properly combined, the Rocket motor can more than hold its own in competition. For those interested in specifications, the Rocket Motor featured a 13/16 inch bore, 7/8 inch stroke; displacement, .46 cu. in.; and a weight of 8 ounces. For flying nowadays, the Rocket engine un­ fortunately requires a 1/4 inch V-2 spark plug, which is in rather short sup­ ply. NAILED TO THE CROSS Newest 48 inch span, scaled-down old timer by Micro Models, the famous Miss America, designed Bob Cowles (old time friend) writes by Frank Zaic.Reduced version is for light-weight 3-channel radio systems. A great trainer. to state that the Tex Newman drawing of the Mighty Midget was in error, be­ (No. 2 style) as compared to the die together with a finned flatter head ing a composite type engine. cast No. 3 style, with the webs as profile, this would have been a good re­ The Mighty Midget with the widely shown on the sides. ference drawing. spaced fins and nearly round head pro­ Bob further goes on to say that if Might mention at this time that Tex file did not come with a plastic tank. the drawing had shown the cylinder has been drawing engines strictly from Further, it has the molded crankcase fins finely spaced and a straight taper the stock he has, and if some of his en- The 'LONG CABIN’ OLD TIMER Model of the Month Gordon S. Light. make the perfect R/C trainer, and the In spite of its unheralded introduc­ Long Cabin, with its scale-like appear­ tion, the "Long Cabin” continues to be ance, would be just right as a sport Designed by: Robert Long remembered by old time modelers . . . model for all members of the family to Redrawn by: Phil Bernhardt not so much for its contest record, as fly. for its clean, simple, functional, and Conversion to R/C is very easy. By Text by: Bill Northrop scale-like appearance. Best of all, it merely doubling the fin and stab spars, flew as well as it looked. leaving a gap for hinges, you’ve got the • Typical of that period, the August For modern old timer competition, control surfaces. If you intend to use it 1937 issue of Air Trails featured a con­ the Long Cabin should make an excel­ for sport flying only, drop the dihedral struction article which was merely en­ lent model for Antique, and in accor­ to about 4 or 5 inches per panel to im­ titled “ Cabin Gas Model.” Also, typi­ dance with the new displacement rule, prove maneuverability. For Texaco cal of Air Trails at that time, the de­ it can take up to .35 glow engine for competition, keep the ship as light as signer of the model, Robert Long, R/C Texaco. As we’ve mentioned be­ possible and go to a smaller engine, for shared the by-line with Model Editor fore, Old Timer cabin ships with radio fuel economy. · FEBRUARY 1976 59 Bill Henn, Jr. at the Old Time Eagle Annual, Lakehurst NAS, N.J. "BuffaloRoy" Edwards at Hill Country with his good flying .020 flew this Golywock. Air dock can be seen in the background. Comet Clipper with Ace pulse radio. Buffalo exploit in last issue. gines are not truly as represented, then Tex has been the victim of some sharp motor trades. We appreciate any and all constructive criticism . . . , keep'cm coming! 1975 FLYING WRAPUP If this column seems to be a bit re­ petitious in reporting contest after con­ test, it is because most of the good meets are held in the latter part of the year. So bear with us, we’ll get you and your club name in print yet! C.A.M.S. 1ST O/T A N N U A L Here’s a brand new club, the Cour ď Alene Aermodelling Society (CAMS) out of Idaho, which staged its first O/T Annual is some of that real cool North­ west weather. Ya gotta be a real die­ hard to let a free flight go in that “ good” weather this contest featured. Ove Pettersson, Vastra Frolundra, Sweden, competes with this Ohlsson .23 powered Swedish As reported by Bob Petro, the flying design, "Hum lan." Ignition engines are hard to come by over there. site more than made up for the bum first meet with his first F/F gas model. cold, windburned, and tired, a happier weather, as you could fly for miles in Won .020 replica and junior Rubber. bunch of fellows you never saw. Bob any direction. The Oregon and Wash­ How about that? Dad was sure busting promises an even better meet next year! ington boys, who drove over 500 miles his buttons over the results of his en­ SAM 21 ACTION to attend, had to admit this field was couragement. Hard on the heels of the SC IF Texa­ really something! The meet was topped off with the co meet and their decision to run sepa­ These grass areas are the result of awarding of very unique and clever tro­ rate events for free flight and radio con­ the farmers burning off the areas after phies made by Clarence Haught and his trol (see last month’s column), the harvesting (this actually promotes talented son, Dave. Despite being wet, Continued on page 62 growth!). When the rains come, a sufficent amount of grass grows, giving the nicest green carpet effect you would ever want for a rise-off-ground site. Incidentally, the way to keep a field is to assure the farmer that no vehicles (cars or motor­ bikes) will be allowed to tear up the grass. After keeping things in proper order, C.D. Clarence Haught left a twenty dollar bill as a token of thanks. Needless to say, the CAMS are welcome anytime! Flying was great despite the cold wind, with only one model being sacri­ ficed to the great thermal god in the sky. Worth noting was the junior new­ The still surviving 8th place winner in the 1937 Wakefield Champs, by Sune Stark. In back is comer, Mikael Mihalik, 14, entering his damaged fuselage of his 1951 first place winner!

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Bird s?...... Continued from page 30 thump of lift and hear the protest of tently, or does the bird seek lift as we the wings as they "oil-canned” , taking do? Are soaring birds hunting, playing, me and saw that little hawk flapping the sudden upward surge of air. In a or just victims of circumstance; and furiously to regain altitude. Of course few short turns I had that thermal cen­ why do they sometimes fly straight or I was faster, and long gone by the time tered, and my trusty Schweizer 1-23D in gliding flight instead of thermalling? he had reached another altitude advan­ and that little red-tailed hawk climbed How does a hawk know where to find tage. Had he hit my prop, it would together for over five thousand fe e t. . . lift and use it to best advantage. How have meant a dead stick landing under wingtip to wingtip! At sixty-two fifty I steep is the bank angle? Are the turns somewhat less than favorable circum­ decided I ’d had enough and it was time uniform and circular, or do they vary? stances! to shove off again downwind. By then Why? Many years later, another red-tailed my little friend had disappeared, so I All of these questions led to others hawk redeemed his breed in my view, split. Again, quite obviously, the hawk and still others. For some, I think I by saving me from a premature landing was out for fun and enjoying thermal have the answer, or at least one possible during a long cross-country soaring flying in my company; I’ll add that the explanation. flight. I was about 60 miles out on feeling was mutual. Birds of a feather, * * * course and getting very low. The six- you might say! Only recently I was astonished to thousand foot altitude I had started learn that a soaring bird must be taught with had dwindled to less than two These and other, similar experiences to soar, even as you or I. Experiments thousand, and I was in heavy sink. have made me more than ordinarily with turkey buzzards raised in captivity Within a very few minutes, unless I aware of soaring birds, their habits and show that soaring is not instinctive. found lift, I would have to pick a field their environment. So much so in fact, Even when carried aloft in an airplane and set up a good, safe approach; there­ that I ’ve decided to see what could be and dropped in a thermal, the vulture by cutting my goal flight short by more done about applying some of the les­ flaps right through it, oblivious to the than 125 miles! Quite obviously, that sons I ’ve learned . . . and hope to learn gift of lift. Soon, the bird must land, was a discouraging prospect for me to . . . to the sport of R/C soaring, and being incapable of sustaining the great think about. Instead, I decided to the problems of sailplane design. So effort required to keep it aloft. A bird “ think thermals” and look about for far, the approach has been rather theo­ of prey must soar to survive because the some sign of lift close enough to do retical, but I'm gaining on the practi­ great energy required for flapping flight some good. cal. Will you help? could not be provided for by its intake It was at that instant that I spotted For example, have you ever wonder­ of food. A large bird such, as an eagle a small red-tailed bundle of feathers in ed why a bird soars at all? Why do or condor, would have to hunt, catch a tight turn about 200 yards off to my some species use thermal lift while and eat its own weight each day in food left front, and somewhat higher in alti­ others seem to ignore it? How many to provide enough energy for flapping tude than I was. He very obviously had soaring birds of what kinds use slope flight. Fortunately, nature meets this a good thermal, so over I went to join lift, and when? Is it because it’s there metabolic phenomenon by providing him. It was gratifying to feel the solid and the bird stumbles into it inadver­ Continued on page 77

FEBRUARY 1976 61 radio assist contests, as the SC IFS, SCAMPS, and AM PS clubs are now put­ You have a CHOICE with ting on better than one contest per month strictly for free flight. If inter­ ested, write this columnist. ° Ηεο f in is h s·«* PENSACOLA PICKINGS More stuff from the effevescent SAM KsB SUPER POXV Editor, Jack Bolton (former Navy Helo SPRAY or BRUSH/SATIN or GLOSS Commander). Jack reports the first O/T F/F radio assist consist staged by his group came off in fine style. Of PAINT & CATALYST course, Bolton is good with that Play­ The easiest to apply and most boy of his . . . he had no trouble win­ durable EPOXY PAINT AVAILABLE— ning the R/C events. However, the free The "Ultim ate Finish" flight events were something else again, A development of the space age, Super Poxy Paint is formulated with Tom McLauglan’s Veco 19 power­ exclusively for models . . . mix and use ed Zipper winning Class I. Ron Sharp- SUPER POXV (NO WAITING TIM E-N O HAND ton, with a F00-2U-2 (what else!) pow­ M*tCMlD FINISH SVSYIK RUBBING). Fast cufing. Quick drying. ered by a Forster 29 cleaned house on Sets up rapidly. Minimum dust the boys in Class II. Not to be out­ adherence. Stays glossy longer. Least done, “ ole sleeper” Sharpton won the affected by ultra-violet sun rays or rubber event with his Korda, thus set­ manufactured fuels. ting up a win for the Sweepstakes Tro­ 11 BASIC COLORS phy. Before we forget it, Doug Singer ------SPRAY OR B R U S H ------won .020 Replica with a Dodger. Red · Blue · Yellow · Orange Interestingly enough, in the regular • White · Black · Aluminum · Metallic free flight events, Charlie Alba was in Green · Metallic Blue · Metallic Red the "super fly off” with his .020 Ran­ • our own K & B Purple · All above ger. It was unreal to see Charlie packed in Vi Pt. or Vt P t. cans competing against “ Buckets” Johnson plus 22 ADDITIONAL COLORS with his huge ST56 Class C job. Too available by mixing. BRUSH bad Charlie blew it with a 5 second motor run! CATALYSTS CLEAR · PRIMER • THINNER CDDAViup — Satin or Gloss SAN VALEERS-SCIFS WINTERNATS SP R AY IN G __1/4 Pt or i/2 Pt PRIMER CATALYST For use with K & B SUPER POXY- This meet, originated by the San Va- D D iicuiM P — Satin or Gloss 2 Pints or Quarts Ö H U 5M im i_1/4 pt or i/2 pt V Pt. only leers, has enjoyed even more success when it incorporated a full suit of old K & B FIBERGLAS - f o r covering K & B SUPER POXY R E S IN -fo r timer events. The SC IFS club, with The highest quality, toughest weave- * 3 ^ sealing and applying glass cloth Otto Bernhardt as C.D., ran what could fiberglass available, to r use with poly­ Created to include all the characteristics ester or epoxy resin. Excellent contour­ desirable in a resin and its application. be called a big Fun-Fly. ing qualities make it easy to apply to Easily workable: Requires minimum compound curves. sanding. Little, if any, clogging of sand­ According to reports received from Available in 3 weights — 38" wide — paper. Curing time adjustable by the R.G. Brickner, Editor of the SC IFS LIGHT Va 02. CLOTH, fo r all wood air­ amount of catalyst. planes— cover 100%. Durable: Does not become brittle “ Flightplug” newsletter, competition MEDIUM 2 OZ. CLOTH. For increasing structural 1 QT. CAN (including catalyst) strength around fillets, nose, or interior of plane. was low key, with plenty of hangar HEAVY 6 02. CLOTH. For joining wings or molding flying. Both north and south were well your own parts. K & B MEASURING/MIXING CUPS represented in the fine free flight K & B Micro-Balloons FILLER — Twenty-four one ounce, unbreakable Mixed with K & B Resin is perfect for plastic cups. Epoxy resin and most weather. fillets or tilling in defects (or repair­ model and craft cements w ill not ad­ Of particular interest to this colum­ ing later damage). Sands beautifully here. Accurately graduated, trom mil· to a smooth, strong hard finish lileters to fluid ounces. nist was the inclusion of cabin events, 1 02. CARTON Cat. No. 8172. 24 to Package as proposed by Sal Taibi. These events Send for your K&B are well worth reviving, as the writer Catalog, "Matched Finish K&B MANUFACTURING System" Handbook and has always been very partial to the more Super Poxy Paint Chart. DIVISION OF AURORA PRODUCTS CORP. Include 25c to cover realistic flying characteristics of cabin postage and handling. 12152 WOODRUFF AVE., DOWNEY, CA 90241 , models. In this contest there were Address to Dept. SR-3 plenty of Class C entries, but the Class A and B just died from lack of interest. Plug Sparks.. Continued from page 60 (called the Fuel Allotment Event) was Simply a matter of pushing harder, SAM 21 club staged a quickie Texaco won by Loren Schmidt, using his field men! meet in San Jose at Santa Teresa Park, at Elk Grove. He not only supplied the As previously noted, the trend has to see what sort of turnout could be field and the barbecue goodies, but also now become a fact, with nothing but expected for an R/C Texaco contest. won the contest. How about that for Comet Sailplanes being entered in Class With less than a month's notice, the a perfect day! C. Limited Engine Run Event (class A-BC) At present, SAM 21 has launched a Three Orwick powered, one Spitfire enjoyed twelve entries, while the ever- series of monthly contests designed to and one converted Veco 61 were the popular Texaco event pulled ten entries. be held at various locations, to find winners! Class A and B are still both Based on this success, and a follow­ the best field for O/T R/C operations. dominated by Rangers powered with up Fuel Allotment Contest held three Other sites besides Taft and San Jose .19 to .201 combinations, which gives weeks later, SAM 21 will stage a Texaco include the San Luis Dam Reservoir, you two chances to win a trophy. Zip­ R/C event early in the spring of 1976. the Elk Grove Schmidt farm, the Tracy pers appear to be a trifle overmatched Winners of the Texaco and Limited Airport, Manteca Amusement Park, and on a power per wing area basis. Engine Events were John Pond and Er­ Hill Country in Morgan Hill area. Before signing off the meet, numer­ nie Berio, respectively. The 1/8 ounce With a membership of 38, SAM 21 ous goofs were seen, with Brickner let­ of fuel per pound of model weight hopes to emphasize old timer free flight ting his Aerbo go twice without the

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Send To: BUD ANDERS - N.M.P.R.A. 16509 Saticoy St., Van Nuys, California 91406 Please send m e_____copies of the R/C NMPRA Pylon racing book. ($3.95 each) Add $1.00 for each book for post­ age and handling. Outside USA, $2.00 NON PROFIT NAME ______All money from the sale of this book ADDRESS ______goes to the NMPRA for the promotion CITY ______of R/C modeling. STATE ______ZIP ______

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 63 loop scavenging engines. Do not send OLDTIMER R/C money with your engine, he will bill SCALED FOR .049- .15 POWER you when he gets around to the work. "Small enough for a schoolyard - large enough to compote." Those interested should write Mark Fechner at 112 Clinton Avenue, Salt Lake City, Utah 84103. Really gor­ geous work, I know, I have a couple of Klondykes! Authentic Scaling EASTERN HOT FLASHES Full Site Detailed Plans 1935“MISS AMERICA" As captioned by Randy Carman, of Machine Cut Parts the SPOTS Club, quite a bit of O/T F/F Selected Balsa & Hardwood 48 In. Span 310 sq. In. radio assist activity has been going on in Meets S.A.M. Rules 30oa.— 3 chan. New Jersey and near by states. Matter $27.95 of fact, SAM Prexy Joe Beshar reports MICRO MODELS that no less than 14 contests have been D«al«r/Dlstrlbutor Inquiries Invited. P.O.BOX 1273 - A Mall orders. Add 10% (or postage & handling. held on the Eastern coast, so a quick COVINA. CALIF. 91722 Calif residents add 6% sales tax run-down is in order. The Old Timer Eagles staged its an­ nual R/C and F/F bash at Lakehurst CHICKEN HAWK NAS. Weatherwise it rained early Sat­ urday and blew on Sunday. The real redeeming feature was the well-run con­ test. Howard Carman and Cliff Schai- 4 Beck St S E. Murphy, et al. Warren, Ohio 44484 TGRN AGRO CO.Jnc. CHICAGO, ILL., BOB66 The C IA (!), Control Indiana Aero- modeller’s 3rd annual cpntest featured old timer events that wouldn’t quit! shutoff timer operating, also Doc Meara, tion motors in any great quantities, and With a one half mile diameter concrete however, both fortunately got their worse yet, those who do never seem to slab for takeoffs, participants had a models back. “ Lucky” Jerry Vernon let anyone know about it. ball. (who left a Zipper at Denver) probably As reported a few issues back, we As Harry Murphy pointed out, Sat­ has a sailplane in Mexico by now, as said we would advise you when Mark urday was a beautiful day, and Monday one could still hear the motor running Fechner resumes his excellent "Klon- was gorgeous, but Sunday was another after it passed out of sight overhead. dyke” conversion of green bead K& B kind. Seems like Mother Nature was Rough! Torpedo engines. According to the punishing those who had skipped Sun­ It was a great contest all around, latest issue of the US Aeromodellers day school! With a bad wind, the con­ with everyone thoroughly enjoying "Dope Bucket” newsletter, the 1976 testants immediately broke up into two themselves. Next year’s Winternats Klondyke engine production will start groups, the “ Hawks” and the “ Chic­ should be a good one! in May. kens” . The “ Chickens” included such ENGINES If you are interested in converting well known goof-offs as Bonaszak, Bar- One of the biggest complaints this your engine to ignition, Mark sez to telt, Cain, Burgess, Larsh, Pech, and columnist receives is to the effect that send only plain bearing engines. He will Murphy. That’s just about all the hot no one seems to be manufacturing igni- not convert schneurle port or modern shots there are in that area! 64 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER \\ HOT STUFF GETS IT TOGETHER FÄST AT YOUR HOBBY DEALERS NOW DEALERS AND DISTRIBUTORS SATELLITE CITY, P.O. BOX 1935 CALL (2131 899-2301 ARLETA, CALIF. 91331

Those “ Hawks” who did fly were Dick Schuyler, with a first in Class C, followed by Bill Schaffer, Bill Hale, and Buck Zehr. In .020 Replica, the heroes were Elmer Jordan (So-Long), CANNON IS beating both John Peck and Jim Robin­ son flying Brooklyn Dodgers. SMALLER! Curiously enough, Bill Hale after SMALLER LIGHTER smashing his O.O.S. on its third flight, IN SIZE! jj^lN WEIGHT! turned “ Chicken” . He had on the matching yellow jumpsuit that earned C 1 him the nickname of “ Ole Yaller." One of the favorite comments around J 1 ____ the field was, “ I'm gonna enter and then find a place to watch the football game.” Great idea in the wind! CO IB S . Next year, Murphy announces they will have four to five events. As he sez, “ Y ’all come!” I | r ATTENTION CALIFORNIA ENGINE COLLECTORS! In line with our policy of presenting L,\A everything with an old timer twist to it, this column is proud to announce that Dick Dwyer is staging the Second An­ nual M ECA Collectogether for Region Introducing a 2 (formerly Region 1 North) on March 27, 1976. Based on the tremendous SMALLER, LIGHTER RECEIVER success of the 1975 Collectogether, the ...The NEW TINI-MITE March session will be held at the Glen- Eight Channel Capability man Elementary School, 4620 Mattos Volume 1.61 cu in Weight 1 oz Drain 8 ma A Drive, Fremont, Ca. Action starts at NEW STICKS Open Gimbal for precise centering control THREE SYSTEMS FROM WHICH TO CHOOSE. 9 a.m. and quits when the "last dog is 1. TINI-BLOCK includes Receiver, and one Servo in rDROP^ dead.” the block IN SIZE 2. TINI-TW IN includes Rx and two Integral Servos Admittance is $1.00, but this is only 3. TINI-MITE includes New TINI-MITE Receiver, THE NEW to offset the free coffee and doughnuts individual Servos All three systems available in 2. 3 or 4 channels being served. There will also be numer­ Price the same for all three with same MINI-2 channel count ous door prizes, a raffle, and the ever- Transmitter 2x4 15/32* popular auction. If you need more in­ In addition they include transmitter, antenna receiver, servofs) or (block), mead Rx battery 6-5/32 in formation, write to Dick Dwyer, 1837 and charger Transmitter uses 9 volt dry Receiver 23/32x1 13/32x Flood Avenue, San Jose, 95124. Don’t battery monitored by LED voltage indicator 1 19/32 DELUXE SYSTEM, same as above includes Volume 1 61 cu in miss this one! meads, charging lamp, meter in the Tx, Weight 1 oz C02 NEW RULER charger for both packs Current drain 16 ma Rx & Tx in both Standard & Deluxe systems Operating voltage 4 8 to 6 volts ] After we ran the picture of the C02 expandable to a full 4 channels from a 2 Servo 23/32x1-3/8x1 1/2 in or 3 channel system at minimal cost powered New Ruler by that Czech mas­ Weight 1 2 oi 2 Channels 2 Servos — $149.95 ter, Milan Kacha, it was no great sur­ Frequencies All std 27 & 3 Channels 3 Servos — $189.95 prise to find this was constructed from 4 Channels 4 Servos — $239.95 72 MHz an American partial kit. Factory assembled only 27 MHz prices shown ECONOMY PRICED DELUXE Add $10 00 for 72 MHz STD Incorporates mead Due credit must be given to Ed batteries throughout, Write for complete brochure on entire line of Toner, who has a very nice line of .020 $119.95 plus chaigei Add $10 00 CANNON R/C SYSTEMS (27 MHr| tor 72 MHz and C02 powered Old Timers. The par­ r 13400-26 SATICOY STR EET^ $159.95. tial kits come with a reduced blueline NO. HOLLYWOOD. CA. 91605 copy of the original design plus printed (213) 764-1488 parts. Takes a lot of pain out of build- In Canada... H.&.W. ENTERPRISES · BOX 972 · REGINA, SASK. FEBRUARY 1976 65 BETTER JOHN POND THAN A Old Time Plan THIRD HAND! The largest selection of plans in the world at the most reasonable prices. Each list 75c

No. 5 OLD TIMER F/F GAS No. 5 OLD TIMER RUBBER/TOW LINE No. 6 OLD TIMER FLYING SCALE A through K No. 6 OLD TIMER FLYING SCALE L through Z

P.O. Box 3113 San Jose, Calif. 95156 Phone (408) 292-3382

Eagle Annual, held at Lakehurst NAS compression discs used on the full size in October. First time I was ever to a “ Eaglet” . The tail skid is formed from contest and I won first place in the thin sheet aluminum. rubber event using a Lanzo stick from A balsa block is used at the aft end your plans. My son flew a Gollywock, of the fuselage from former “ K ” to the but old dad beat him at this time. tail post. Notch it out to receive the “ I joined the Old Time Eagles Club. stabilizer spar and leading edge. Glue PANAVISE TILTS, TURNS, AND What a terrific bunch of guys! Enjoyed the stabilizer to the block and glue to ROTATES TO ANY POSITION. myself so much at the first meeting I the fuselage. Now add the vertical tail. IT HOLDS YOUR WORK attended. I couldn't drive home (bom­ The V L Motor installation uses 2-56 EXACTLY WHERE YOU WANT IT. bed!). With excitement and camaraderie by one-half inch machine screws and blind nuts on the aft side of bulkhead PanaVise has great strength yet is gentle like that, who could keep from getting enough to firmly hold delicate objects. high from adrenalin?" “ B ” . The switch and charge plug is That’s the name of the game, men! mounted on the bottom of the fuselage, Quite possibly the finest new tool using small sheet metal screws. (See you will buy this year, PanaVise is built to exacting professional Eaglet...... Continued from page 43 view “ A ” ) The remainder of this sec­ standards. We guarantee it! tion provides access to the battery and I used a piece of sharpened brass tub­ adjustment of the battery for pitch or Illustrated is the $19.95 general ing to cut the holes for the engine cylin­ CG adjustment. Two small rubber purpose Model 301. Three other ders. The cylinders were modified from bases and a wide variety of heads bands are used to attach the battery to are available. All interchange! Buy Williams Bros. LeRhone one-and-one- the hard wood stick bolted to the for- the basic unit, then add on to half-inch scale parts. Details of the con­ ware nose block. A 2-56 bolt and nut create a system. version is shown on the plan. is used to attach this stick to the nose The landing gear is bent from .031 block. Available through your dealer. music wire with 1/8 O.D. aluminum The wing is attached to the fuselage Write tor a free catalog. tubing slipped over the wire to repre­ by pushing the 1/16 inch dowel all the sent the tubing used on the full size way forward, then back through the “ Eaglet” . I used 1/4 inch lengths of Dept. 10S rear struts, then forward through the 1/16 and 3/32 O.D. aluminum tubing forward struts and is retained by two 10107 Adella Ave., South Gate, CA 90280 to center the tubing on the wire. Use small rubber bands. The wing struts In Canada: 25 Toro Rd., Downsview, Ont. epoxy to hold the tubing in place. The are made from 1/16 inch plywood. I M3J 2A6 two members of each side were bent used aircraft grade mahogany plywood, I A Division of Colbert Industries from one piece of wire extending as it is lighter and stays straighter then through the fuselage at the front mem­ birch plywood. Slot the ends with an bers where it is sewed to the fuselage X-acto saw to receive the Robart “ Mini” bulkhead. Don’t forget to install the Hinge Points. Use epoxy to fasten the ing the models. tubing as you form the gear, as you will hinges in place. The strut assembly is Buzzer Model Airplane Co. (Ed To­ have a helluva time putting it on later! completed with the addition of the ner’s business name) is located at 52 A second piece of wire is used for the jury struts and pin attachemcnt. A 1/16 Newbury Road, Howell, N.J., 07731, upper “ Wee" in the front view of the inch dowel joins the front and rear if you are interested in peanut scales gear. This part is also sewed to the same struts, at the jury strut attachment. (the firm’s specialty). No less than 17 bulkhead. A third piece of wire forms Cover the model, using your Japa­ plans of peanut flying scales are offered, the remainder of the gear and the wheel nese tissue, and thinned-out Wilhold plus a series of scratchbuilder plans, ran­ axles. Pieces of 1/16 O.D. aluminum White Glue for attaching the tissue. ging from 13 inch peanuts to the World tubing are used to enlarge the axles. After water-shrinking the paper, apply Championship FA I Sailplane from Swe­ Two inch Trexler Wheels complete the three coats of thinned-out nitrate dope. den, called the Rapier 13. landing gear. Note that the extension of I used Floquill Model Railroad Colors NAME OF THE GAME the rear legs of the gear extend through mixed with nitrate dope for the colors Among the many letters received by the bottom of the fuselage to provide noted on the three view. Use ink to re­ this columnist, none tickle him more shock absorbing ability in the rear and present the cowl split lines, door out­ than the type as written by Bill Henn, upward direction. A small piece of rub­ line and control surfaces. Use split Clifton, New Jersey. He sez, “ I have ber band is used to tie the upper and bamboo for control horns and thread just returned to modelling after a 35 lower landing gear Vee’s together. Bal­ for the control cables. year layoff, and attended the Old Timer sa disks are used to simulate the rubber Balance the model at the point

66 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER shown on the drawing by moving the battery fore or aft as required. Initial flights should be made over deep grass MODEL or weeds until necessary adjustments are made. Thrust line changes are easily ACCESSORIES made by the simple addition of small washers under the motor attach screws. My model required a single 1/32 inch washer under the upper left hand motor attach screw, which provided a small amount of down and right thrust. .. . this beautiful Monocoupe by Megow? Follow the instructions in the VL- One of the four most super-detailed 101 Electric Flight System instruction plans that Megow ever made. book when charging the battery. I used We have this, plus many others, print­ about thirty seconds of charge at two ed in clean black line. For catalog, send amps for initial flights. After initial ad­ .δΟ6. refundable with first order. WING HOLD DOWN SET justments are complete, give the battery GOLDEN AGE REPRODUCTIONS To attach wing to fuselage. The set P. O. Box 13, Braintree, Mass. 02184 includes: steel bolts, threaded blocks, a full charge and set her on a smooth moulded protective washers and all surface for a most realistic takeoff and mounting hardware. $1.49 per pkg. flight. You can almost hear the old strongly, then go rich and relax, making Szekley purring away, and you don’t it likely to catch your finger in the have to worry about cylinders flying off p ro p ! like they used to do on the real en­ The useful life of a pacifier is deter­ gines, over 40 years ago! mined; 1) by the brand, 2) whether or Good luck if you build the Eaglet, not you are testing or flying in compe­ and write to me in care of the M ODEL tition on a particular day, and 3) how BU ILD ER , if you have any questions. the pacifier is mounted. The thick wall NY-ROD KEEPERS The author wishes to acknowledge variety is best. They offer more pres­ To secure Ny-rod and Golden rods to the following sources of material used in sure and last longer. “ Binki” is an ex­ fuselage sides. Bend metal tab around rod and attach to fuse with double preparing this article: cellent brand, and can be found in the sided tape (included). $.79 for four. U.S. Civil Aircraft, Vol. 4 & 5 hobby shop. If not, you can find paci­ Sport Flying Magazine, Vol. I, Issue 1. fiers in the baby section of the local drug or department store. If purchased Pacifier...... Continued from page 54 this way, they are complete with all the by finger pressure, open timer, and be­ usual baby apparatus and must be disas­ gin usual starting procedure. As engine sembled. Best method of purchase is LANDING GEAR STRAPS fires on its prime and reaches near peak not to explain what you’re buying them Strong nylon for main gear. Includes RPM, release finger pressure on fuel fo r! screws. $.69 per set. line. (Fuselage should be held in such a How long a pacifier should be used is way so as not to depend on the fuel up to you and the type of flying you line control finger for a firm grip.) If are doing. Generally, one pacifier is engine begins to flood out, pinch the good for a full day of sport or test fly­ line and hold ‘till prop stops, and turn ing. Remember, however, the longer needle valve in about a half turn. you use it the less pressure it will sup­ You will find that in a rich condi­ ply, causing a gradual decrease in RPM . tion, the engine can be kept running by So if you are contest flying or final REMOTE SWITCH LEVER applying and releasing pressure to the trimming, discard a pacifier that be­ An easy way to operate on-off switch fuel line. This can be useful, as it gives comes limp and mis-shapen (when located inside plane's fuselage. $.98. you time to adjust the needle valve e m p ty ). without a re-start. One thing that helps How the pacifier is mounted has a to master this technique is to have the definite bearing on it’s life ... not only fuel line held in place so that when it is from the standpoint of how long it will released, it won’t jump away, out of last, but whether it will burst at some reach of the control finger. See "Fuel unfortunate time, such as, just after Blipper” in sketch. takeoff. Some modelers prefer to build Once you have located the proper a compartment inside the fuselage, and SKIS this is fine, if the compartment is coated needle setting for your engine, it will For trike or tail dragger planes. Easy (j start consistently at that setting with with fiberglass or epoxy resin and is to install - available in four lengths: [J only minor changes to peak. When fine- very smooth. The drawbacks to a com­ 8, 12, 15, 18” . Molded in runners for tuning your engine, a pacifier system partment are; the extra time involved, good tracking. $8.95 per pair. Nose I wheel ski - $4.50 acts much the same as a crankcase pres­ the extra weight of the coating, and the sure arrangement . . . that is if the set­ difficulty in arriving at a smooth un­ ting is too rich, the engine will burble blemished finish. Invariable, there will and die slowly with an abundance of be a sharp bump here and there, causing fuel spitting out of the venturi. If too repeated bursting of full pacifiers. The lean, the engine will run erratic . . . that bumps I am referring to are hardly visi­ is, high RPM first, then engine will seem ble and can hardly be felt. They are to flood out and then catch again, alter­ caused by sawdust in the air that lands nating low to high RPM ’s. Care must be on the uncured epoxy, causing the resin taken while adjusting for a lean run, as to build to a peak around the particle. there is a vast difference between high If this happens, and you are plagued and low RPM, but very little needle val­ with bursting pacifiers, put a balloon ve difference. The model will pull over it and band it. The easiest way to FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 67 COMPETOTE STANDARD DELUXE MITER SARDER MITER SANDER $ 1 4 .9 5

Sands Bevel Angles To 5 0 ° In Balsa, S tyrofoam ,P i ne,E»c W ork C apacity 1.5" Thrck x ll" Long • Does Every Thing Standard Model Can Precisely Sauare Up Blocks, Strips Etc. Reversaole Sanding Block Uses 2 G rit • Compact S i,, la'·*,.. Do PLUS: • Precisely Measures And Sands Sizes For Rough & Finish Operation • G o T lo í Fu°,d|'c 0S;^ » '' Dihedral Angle Into Foam O r Built A ll Parts P re-cut For Easy Assembly Up Wings „ Complete Hardware & Pre■ assembled • ίϊ;:,'· .'· '« .· .· !'.:::· · ' • Work C apacity 3 Thick x 14.5 Long Slider Track I We Accept C O.D. Orders, Checks \ CUSTOM CRAFTl 1 Add SI-50 tor pos». & handling N.Y. residents add sales tax m fa I y PRODUCTSL 1 9 F I O R G a TE RD. FARMiNGDAlE N.Y. 117 3 5

do this is to put a 1/8 diameter hole at the end of the balloon and squirt some fuel inside before slipping if over the \HTKOOUC\W pacifier. The hole will allow air to es­ cape from between balloon and pacifier making it easier to install in fuselage. The fuel will lubricate the pacifier. [n e w u g w t w « 0 ” 1 The alternative to an inside installa­ tion, and what I have switched to, is an external pacifier mount. SUPER CO VE»«) “HOT TIPS AND SNEAKY TRICKS” Cox engines using pacifier pressure systems are much easier to adjust, and hold a setting far better, if a "Kirn” needle valve, body and venturi are used. On 1/2A ships, a rolled pacifier will Just as tough as ever (100 X stronger than give maximum pressure with a mini­ mum of fuel, resulting in a neat instal­ silk). .. but 33-1/3% lighter. That means it lation and less weight. Timers that are strong enough and weighs less than silk when both are painted. are consistant, are hard to find these days. For the best timer we have found, What's more, it'costs less than silk because it see MODEL BUILDER MAGAZINE, March ‘75, for the Satellite City "YO U takes half as many coats of paint. It is also CAN MAKE IT” article on camera tim ers. far easier to apply. All you do is iron it on, We use Hi Johnson Model Products fuel bulbs to fill pacifiers, as they are shrink it drum tight and wrinkle free — strong and will not come apart under the squeeze necessary to fill pacifiers. adhesive and filler coats are built-in. It takes THERMALS. ·

only 29 minutes to cover a 60" wing, while Soaring...... Continued from page 29

they will keep bouncing if someone silk requires 65 minutes. Look for new doesn’t make the effort to put them in­ lightweight Super Coverite on your to action. Send in any rules proposal that you feel is worthwhile. If you dealer's shelf. It comes in 2 sizes don’t do it, it won’t get done . . . and then I’ll have to listen to another couple of years of griping! only: 38" x 46" or 15 foot * * *

rolls. Try it — the difference will New products that are on the hori­ zon would seem to mark a trend toward be obvious. more serious, competition-oriented sail­ plane that may or may not become available during 1976 is the “ Mariah.” This is a fiberglass and foam hybrid that will be the essence of aerodynamic RITE purity. Jack Chambers, of Mission Viejo, California, is the designer/crafts- man who has conceived and executed this work of art. And work of art is no exaggeration

WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ------EKIogictrol------R/C MODELERS BUY EK LOGICTROL FOR MANY REASONS, ONE IS THE BEST WARRANTY AND SERVICE IN THE WORLD.

For our full line brochure, write EK-logictrol. Dept. SRM.3322 Stovall St., Irving, Tex. 75061. Distributors, jobbers and dealers contact us for our new plan. Reliable radio control systems in describing the Mariah. No detail has been overlooked to assure the ultimate S iearm dh C 3 GENERAL in aerodynamic “cleanliness.” Jack is Aristocrat using his own very thin, undercambered airfoil on an 80 inch, high aspect ratio wing. The trailing edge comes down to a razor edge. All control horns are en­ 5· * WtmSRAN. 02 0R0WCR. row RADIO CONTROL OR FREE FUOMT. (S IΛ* WMSMK * OR RUMEN. COE. OR (MO ROWER A DT OR MOSTAlVA closed within the slender fiberglass ro* RADO CONTROL OR TO THREE CHANNEL* ONE OF THE OOLDCH ERA'S ORCATEST AN CRAFT AMO A 0CLI0MT το ·υη.ο A MSTOftT MAKER K f P ftt WORLD WAR |L ISM (epoxy resin) fuselage. The rudder is re­ AMERICAN cessed into the fin to provide an abso­ CLASSICS lutely gapless joint. The all-flying stab, BELLANCA which mounts atop the T-tail, has a “Skyrocket" molded fairing which seals the joint be­ Φ9 P IP tR CUB tween the fin and stab. The wing fil­ 54* WMDSRAN, 0( 0 ROWER FOR FREE lets are faired back progressively all the FLJDNT OR RAOK) CONTROL. RLAM5 ONLT 59* W1N9SRAN, .0(0 ROWER FOR Itoo way to the tail to eliminate any turbu­ ROLSE AMO SMALL MULTI-RADO CONTROL UNIT* CAM RE FLOWN FREE FL*HT ON lence that may be created at the wing/ ROWER OR RUMEN ON DIRECT ORDERS ADO IO% FOR RACKM fuselage junction. Attention to mi­ , M S ROSTADE VA RESIDENTS ADO 4 % TAX FLYLINE MODELS •SEE YOUR LOCAL HOBBY DEALER· I064J ASHBY PL PAIRFAX.VA 22030 nute details extends all the way to the wire tail skid which is filed to an airfoil competitor. Ten foot wings for the ing for the Birds?”, Jim writes about cross section! The present prototype Hobie Hawk will probably be available soaring birds and their relationship to of the Mariah uses a built-up wing, al­ soon, and a set of short, high aspect full-size and R/C sailplane soaring, if though production versions will have a ratio racing wings shouldn’t be too far only our feathered friends could talk! · foam wing. The Hoerner anti-vortex behind. The rumor mill says that Craft- tips are formed from fiberglass. Pro­ Air is working on a new giant sailplane jected price for the highly prefabricated Hannan...... Continued from page 46 that is aimed at FA I competition . . . kits is to be in the $250.00 range. tional and entertainment value to their and it supposedly is to be even larger A very well engineered, well built builders, they serve museums all over than the Leo that Craft-Air now kits! soaring accessory is in the works now the world, having certain advantages Cecil Haga is well on the way to pro­ from Scott Research. Greg Scott will over the full-size counterparts: First, ducing a 100 inch version of the very be manufacturing an all metal, die-cast, museums are almost universally short popular (and competitive) Legion-Air. releasable tow hook. The design will be of space, and thus simply cannot accom­ Two small “ fun” planes have appeared most unique, in that it can be operated modate as many large aircraft as might recently. The Rubber Duck, from Per­ as either a conventional open hook or otherwise be desireable. Then too, one formance Flight Systems, a foam and as a “captive” hook, which keeps the cannot get far enough away from a real plastic hybrid for thermal or slope, and plane securely on tow until released by airplane, cooped up in a room, to see it the Bunny, a cute, all wood six footer radio command. The all die-cast unit in one sweep of the eye. Thus, a model from Superior Flying Models. Both will include a built-in return spring and may give a much clearer understanding look like solid additions to the range of will come completely assembled. Sel­ of overall configuration. Also, models planes available for the sport flier. Ob­ ection of the mode of operation can be enable easy and graphic size compari­ viously, the hardware is keeping up with made immediately prior to hooking up sons, if constructed to a common scale. the state of the art . . . now all we have the tow line to the model. Since the Finally, many full-sized aeroplanes owe to do is use if effectively. hook will be cast from aircraft alloy an immense debt of gratitude to models aluminum, it should be nearly indes­ Jim Gray sent us a most interesting which have served to test theories with­ tru c tib le . article on soaring birds, and their rela­ out risking pilots. Perhaps the majority Other new developments to look for tionship to R/C soaring. Since I’m so of the world’s production aircraft first in the near future will include: A new long winded, we won’t be able to print flew in “ effigy” for wind-tunnel tests. kit from Pierce Arrow Co. . . . the it in one chunk, but we will spread it ALEXANDER GRAHAM BELL Pierce Paragon. This ten footer is a real over the next two or three issues. And Best known for his work in the com­ lightweight, with amazing handling I don’t want anyone telling me that munications field, Bell was also an avid characteristics. Paul Parszik’s j.P. Mo­ this column is for the birds! Jim, the aeronautical experimenter and kite en­ dels will be releasing its Javelin II. This flo o r is y o u rs . . . thusiast. He and his associates worked 134 version of the standard class Javelin I’d like to refer you to the interest­ for more than a decade in an effort to has undergone extensive revisions since ing several-part article by Jim Gray, be­ establish aerodynamic principles to im­ the prototype, and should be a real ginning in this issue. Entitled "Is Soar­ prove flight efficiency and safety.

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 pilots. Turns out that the stuff is total­ FOR THAT PROFESSIONAL LOOK.. ly worthless, and was intended only as a psychological crutch. In recent tests, some sharks actually ate it. Next thing we know, they’ll be telling us that there really is no Easter bunny either! $2.49 'BALLAST-LOK" AEROMODELLER ANNUAL $1.95 The 1975-76 edition, edited by R.G. "HOOKER” Moulton, and illustrated by A. A. P. ADJUSTABLE Lloyd features none other than "Plug TOWHOOK Sparks” editor, John Pond, both on the cover, and inside, in the form of an BOTH FULLY ADJUSTABLE article on his favorite “ Old Tim ers" sub­ AVAILABLE AT FINE HOBBY SHOPS EVERYWHERE ject. Other contents include 3-view drawings of Wakefields, A/1 and A/2 Add 35 cents postage and handling. California residents add 6% sales tax. gliders, F.A .I. free flight power models, as well as U/C and R/C sport models. ^ S C O T T RESEARCH CO., P.O. Box 22, Costa Mesa. Ca. 92627J Feature articles cover a wide array of subjects including rubber speed (by Charlie Sotich); unusual model engines; were more indirect. Among the young Pennyplanes (by Dave Linstrum); U/C ÍPEA POD and talented researchers who continued combat (by P.S. Richardson), and a OE SIGNED BY on their own after Bell’s efforts were host of others, including a selection of Tom Protheroe discontinued, was one fellow destined handy hints from California Flightmas- to become a leading light in aircraft de­ ters. If not available in your area, these AMVA sign. His name? Glen Curtiss. books may be ordered directly from the CLASS GOODBY TO VTO publishers. In fact, we suggest that you A? k 709 3 6 / 6 0 0 While the controversy over the new send for the complete Argus book list, e o ^ i A.M .A. free flight competition rules re­ which covers virtually all aspects of garding hand-launch rages on, Dave Lin­ model building. The easiest way to do strum, long-time editor of Model Air­ this is to obtain a couple of Internation­ plane News’ V.T.O. column of news, al Reply Coupons, available at low cost has decided it is time for a change, and from your local post office. Send to: has announced a contest to select a new Model & Allied Publications, Argus title. Prizes will include merchandise Books Limited, Station Road, King and M.A.N. subscriptions. All entries Langley, Herts, England. must be postmarked by March 1st, with MOONEYS CELEBRITIES the actual winning title to commence Walt and Carole Mooney attended a with the June, 1976 issue, which repre­ school reunion in Ripon, Wisconsin, and sents Dave’s ninth year with the maga­ managed to find time to attend a model zine. All entries should be sent to Dave, aircraft meet. The proceedings were c/o Model Airplane News, White Plains covered by TWO newspapers, and oc­ WRITE or CALL Plaza, One North Broadway, White cupied nearly full pages. We would like 213-661-79 28 to quote a few passages from one of FREE CATALOG $ 2 9 . 9 5 Plains, N.Y. 10601. STICKY ISSUE them, the SQ U IRE: KIT FEATURES Among the items declared illegal to "What a day it was for Ozaukee • c o m p l e t e s a il c o n t r o l MECHANISM • MACHINED WOOD AND METAL PARTS carry in passengers’ luggage, according County 4-H Aeronautics Project mem­ • COMPLETE BASIC h a r d w a r e p a c k a g e to a recent FA A directive, is model air­ bers and other area model plane hob­ • ALL RIGGING A A FULL SAIL PLAN • A BASIC COURSE IN SAILING plane glue! (If It’s hidden in your lug­ byists! On Sunday, Oct. 19, the Park- R C SAILPLANES A ACCESSORIES gage, how do you suppose th ey’ll sniff view School gym was the scene of a

AVATAR72 $32 .95 C U R IO $ 4 4 .9 5 it out? wen). never-to-be-forgotten model plane fly­ INVERTED FORTUNE ing session which saw local youngsters HI-STARTS - PAR ACHUTES-RUBBER Remember the “upside down” U.S. (and oldsters) learn the secrets of. mak­ DEALERS Λ DISTRIBUTORS STD. TERM Airmail stamp of 1918? Well, according ing model planes fly from one of this M S LIMITED to a UPI release, a single example of country’s leading aeronautical engineers K O. B O X 90748 L .A . C A . 00090 J this type was recently sold for a stag­ and model plane experts. gering $45,000! The anonymous pur­ “Walt Mooney, of San Diego, is an In 1907 he wrote: “ I have had the chaser wanted it as a Christmas present aeronautical engineer who has designed feeling that a properly constructed fly­ for his wife. There must be a message planes for Helio, Convair, and other ing machine should be capable of being here somewhere. manufacturers of commercial and mili­ flown as a kite; and conversely, that a ANOTHER BALLOON PUNCTURED tary aircraft. He is also a designer and properly constructed kite should be Old 1975 was a tough year for cred­ builder of private aircraft. His “ Honey capable of use as a flying machine.” ulity. As it turned out, there seemed al­ Bee” is on exhibit at the Experimental Bell assembled huge kites of complex most nothing that could be counted Aircraft Association Museum in Hales design, fitted together like honeycombs, upon as reliable, especially among world Corners . . . A graduate of Ripon and combining the'qualities of light weight, governments. Considering that they M.I.T., Mooney is also a pilot, one of strength and stability. In December of are all made up of politicians, perhaps the few who competes in aerobatic 1907, one of these tetrahedral kites this should not constitute too much of stunt flying with unpowered gliders. He lifted Army Lt. Thomas Selfridge some a surprise. And yet, we all seem to have is also the most prominent expert in the 168 feet above Cape Breton’s Baddeck an inner need to have faith in field of small free flight model planes B a y . SOMETHING. Latest hoax, revealed which are exact replicas of real planes. As it turned out, Bell’s chief contri­ by the Navy, was the World War II His articles and plans for these planes butions to advancement of aviation shark repellent, issued to all military appear in model plane magazines 70 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER THE REVOLUTIONARY NEW COVERING WITH THE BUILT-IN FINISH COVERS ALL YOUR FINISHING NEEDS!

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SU PER NIONOKOTE — the revolutionary covering you MONOKOTE TRIM SHEETS-Cut out your own trim de­ just iron on, available in a variety of colors and finishes— signs, numerals and markings from wet (pressure sensi­ • C le a r · 3 M e t a llic C o lo r s tive) adhesive trim sheets, 5" x 36" or 26" x 36". Choose • 10 Opaque Colors · 4 Transparent Colors from 10 colors. Also available in 4 checkerboard de­ • 3 Matte Military Finishes signs, 5" X 3&'. Ideal for covering foam wings. MONOKOTE MARKINGS AND NUMERALS-Printed and NEW SUPER MONOKOTE HEAT GUN-Designed for die-cut to apply the finishing touch to your model. Navy Super Monokote and other heat shrinkable materials. and Air Force insignia and numerals, AMA letters and Shrinks large areas without contacting the finishing numbers, 1", 2" and 3" sizes. surface . . . The fast, easy way to a flawless, uniform

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FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 RADIO CONTROL W A C O S . R . E MODEL

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FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 73 AIRCRAFT INSTRUMENTS .98 ENGINE ADDITIVE .98 LATEX FUEL LINE .98 STANDOFF SCALE WING SPAN 64” KWIK SET 0 .3 2 E V I S E H D A K IC T S O R Y T S MESSERSCHMITT Bf 109 E BSEA"^ SQ 6 MINUTE EPOXY PRIDE OF GERMAN LUFTWAFFE ENGINE .56 to ^7 ^ ' ---- RADIO 4-6 CHANNEL DISTRIBUTORS FOR MICRON Ί | Multi-Cylinder Engines SPAN AERO '$79.95, .MOLDED FIBERGLASS FUSELAGE Ä WITH r INTEGRAL FLITE GLASS MODELS kFIN. FIREWALL INSTALLED, FOAM CORES. MOLDED "CANOPY & EXHAUST STACKS, DECALS. ACCURATE HOBBY HOUSE 3 VIEW DWG. OF ME 109 E INCLUDING COCKPIT DETAIL, SCALE ROBART GEAR STRUTS, NO BALSA $5.95 WOOD INCLUDED. A TWO PART, TWO COLOR FOR EASY GAS MODEL PRODUCTS MIXING EPOXY ESPECIALLY FORMU­ DEALER 1IO VALLEY VIEW LATED FOR MODEL CONSTRUCTION. INQUIRIES INVITED. GRADUAL CURING. AVAILABLE IN SOUTHGATE KENTUCKY 41071 EASY TO USE POLY BOTTLES. 12 OZ.

Gillie’s Mini auto. Doug’s voyage star­ ted from Glasgow, Scotland, while mine VL-101 ELECTRIC FLIGHT SYSTEM began from San Diego, California. Our Featuring link-up destination was Paris, where we H Y T O R K 48 were met by enthusiastic model builder MOTOR & PLANETARY GEAR UNIT Complete flying weight 2VS oz.----- will power Georges Chaulet, who served as our Models 25 to 50" wingspan weighing up to 10 oz. guide and translator, in addition to * Send 25Í for Catalog showing com­ keeping up our spirits with his unique . / plete line of Electric Flight Equipment sense of humor. (He writes children’s and Accessories books for a living). UJ ► VL-101 System $19.50; Hytork 48, We toured the Musee de I’Air, Con­ «5* Prop and Instruction Book $9.00; Fast servatoire National Des Arts Et Metiers Chargers $14.50 to $29.50 (where the O RIG IN AL cross-channel > See your Model Dealer or order Direct Blériot is located) and even tried our M PRODUCTS (add 10% for Postage and Handling - luck in the French Metro underground DIVISION OF VISTA LABS Calif. Residents also add 6% Sales railway. Next we visited Maurice Bayet, y % 7023-D Canoga Ave. Tax) send Check or M.O., No. COD's Øy/ Λ Canoga Park, Ca. 91303 * Hobby Dealers send for Information Editor of M.R.A., the oldest of all French aviation magazines. Maurice knew most of the pioneer aviators first­ hand, and is a fountainhead of knowl­ throughout the world, and his works Along with best wishes for the new edge on such subjects. We then visited appear in “ Model Builder” year, we would like to thank you con­ (Hooray!) “ Baby Train” , a large Paris hobby shop, magazine in the United States . .. Dave tributors who have kept us supplied and went to the home of Mr. and Mrs. Gibson of Cedarburg suggested the mo­ with photographs, fresh ideas, news Jean Marc Geiser, who displayed a items and encouragement. At times the del flying session. Walt arrived at powered Rogallo (full-size) plus many column seems almost self-composing! 10 a.m. and worked with local model­ fascinating helicopter models. Both ers. A number brought their “unfly- And to you loyal readers who continue Geiser and Chaulet have done a great to favor us with your attention, our ap­ able” models with them with the pur­ deal of original pioneering in the field preciation. pose in mind of seeing what Walt Moo­ of motor rotorcraft, including R/C. ney could do with them. True to his From a personal standpoint, the Regretfully taking leave of our reputation, every single plane was ad­ highlight of 1975 was a chance to ven­ French friends, we Minied to the coast justed by him to fly for long flights. ture overseas for a first-hand look at and took the auto ferry to Southern “ All those present will remember aviation, and the opportunity to visit England. Mr. Jack Porter had kindly re­ forever the warmth and genuine interest with enthusiasts in other lands. While served rooms for us in Haywards Heath, of both Mr. and Mrs. Mooney. Walt we only have room for a capsule sum­ a delightful village within handy train kept the session going with endless mary here, we hope to expand upon distance of London. From here we sal­ anecdotes regarding flying sessions with some of our findings in the future. lied forth to visit Aeromodeller writer the world’s top model experts, and with Such an adventure involves careful Eric Coates and his charming wife. Eric a continuous stream of suggestions, ad­ planning and the assistance of many specializes in all forms of scale models vice, and aeronautical engineering prin­ people, and to all of them my gratitude and we were fortunate in being shown ciples that apply to model planes . . . is extended. Such people as J. D. Gil­ his workshop. Next, to the home of lies, Ted Hannan, Pearl Reynolds, Fay Yes, it was quite a day for model plane Mr. and Mrs. P. T. Capon, autogiro hobbyists, that Sunday in Cedarburg Corswirth, The Williams Brothers, Bob specialist, historian, and long-time mo­ and Sandy Peck, Fulton Hungerford, when the top man visited, rolled up deller for an all-too-short visit. his sleeves, and helped modeler after Dave Linstrum, Mr. and Mrs. C. G. Next on our agenda was a trip to the modeler make his planes fly. Walt Scott, Bill Warner, Walt Schroder, Bill Imperial War Museum, followed by a Mooney is a man and a half, and no Winter, and the staff of the San Diego tour of the London Science Museum. one there will ever forget the ex­ Aerospace Museum contributed to the Outstanding aviation and model ex­ p e rie n c e .” success. hibits in both places. Then, lunch with REFLECTION TIME The voyage was conducted with the Philip Jarrett, Assistant Editor of This column is being written shortly precision of a space mission, complete AEROPLANE MONTHLY as guest of before the end of 1975, traditionally a with vital timing, rendezvous points, P. T. Capon. Then, to Foyles book time for reviewing the events of the and even a Lunar Excursion Module, in store, reputedly the w orld’s largest, fol­ year, and looking toward the future. the form of my good friend Doug lowed by a tour of Beaumont’s, pro-

74 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER 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 without ra d io ...... $99.95 Car w ith Jerobee radio . .. $ 1 7 9 .9 5 Car with Futaba radio . . . $ 2 1 9 .9 5 Complete electric conversion chassis, w / power train .... $ 5 7 .9 5 Charging cord fits cigarette lighter — recharges in 20 minutes. LEISURE ELECTRONICS 11 Deerspring, Irvine, California 92705 Phone:(714)552-4540 Accepted

bably the largest exclusively aviation- oriented book store extant. A quick trip to Norman Jones’ Tiger WIN ONE OF THESE Club, and Cierva Rotorcraft Ltd., both located at Red Hill Aerodrome, then off to see artist/aeromodellers Ken McDon- nough and David Deadman, and their outstanding productions. 25 GREAT PRIZES!!! The following day, onward to the 1st Prize: Thayer & Chandler Model E airbrush & compressor kit worth S106 R.A.F. Museum of Hendon, followed by the Mosquito Museum, and winding 2nd Prize: Sullivan deluxe starter & 12v gel cell worth S64.9D up at the home of author/historian A.J. 3rd Prize: Dremel shop model kit =*971 worth $49.95 Jackson, famous for his Putnam series 4th Prize: Exacto kit #87 worth $29.95 aviation books. Then a tour of the Southend aero Museum, and a day later, 5th Prize: AHM heat gun worth $24.95 the fabulous Duxford air display, fol­ Purchase any roll of Coverite. send us the lowed by two days at Old Warden, instruction sheet with your name and 6th to 10th home of the Shuttleworth collection of address printed on the backside. Send in PRIZES: ONE ROLI. antique (Magnificent Men) type aircraft. as many sheets as vou wish BUT TO BE x — - OF CAMOUFLAGE WORTH $9.95 Ray Malmström, the Walt Mooney of ELIGIBLE FOR THE DRAWING, ail entries Famous WWI German lozenge pattern, England, was our next delightful host must be postmarked no later than Febru­ ary 28th, 1978. Send entries to Coverite. silkscreened in 4 authentic colors on in company with his charming family, Dept. MB1, 2779 Philmont Ave.. Hunting­ Lightweight SuperCovertte.TVvo scales: then back to Old Warden, where we don Valley. Pa. 19(MX5. V/i" & 2" flew models with John Blagg, and met Mr. and Mrs. Etheridge, David Ogilvy and Wing Commander Guttery. llth to 15th Ron Moulton, P. S. Richardson, and PRIZES: ONE ROLL the rest of the staff at Model & A llie d OF PERMAGLOSS Publications rolled out the carpet for us WORTH $8.90 in Hemel Hempstead, home of Aero- Lightweight Super Coverite with 4 modeller, Scale Models, and other fine coats of PermaGIoss paint bonded to Its upper surface. For non-painters magazines. A fine crew all! Ron took it's the "Cadillac" of coverings. Won't us for a guided tour of local aerodromes scratch, sag, shatter.______and a visit with Don Baxter, genial owner of the MODEL EXCHANGE, who gave us a rundown on the hobby I6th to 20th «# PRIZES: ONE ROLL shop business in England. OF LIGHTWEIGHT An unexpected bonus next, in the SUPER WORTH $7.25 form of a visit with Mr. Gerald Win- New lightweight Super is now 33%% grove, one of the world’s outstanding lighter. Weighs less than painted silk professional scale modelers. To actual­ costs less, goes on quicker & easier. ly sit at the workbench of this master Its our ever popular "knock down modeler was a rare and humbling ex­ trees" covering. perience. Mrs. Wingrove treated us to tea while we examined the dazzling dis­ 21st to 25th play of miniatures. PRIZES: ONE ROLL Aeromodeller John O’Donnell and OF SILKSPUN family were our next hosts. John is WORTH $6.75 probably the single most competitive- Our unique covering that looks like minded modeler it has been our plea­ tissue but is 100 limes stronger than sure to meet, and for years wrote the any other covering except our own free flight competition column in Aero­ Super. modeller magazine. FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 MODEL RACING PRODUCTS, INC. 12702 N. E. 124TH S T R E E T K IR K LA N D , W ASH. 98033 M 500 ROAD RACE KIT PHO NE: (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.

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almost an ounce), you may cut lighten­ FREE FLIGHT ing holes in the wing ribs, use balsa h a r d w a r e wheels (from O LD TIM ER Models, Box 18001, Milwaukee, Wise. 53218), and make formers F4, F8, F9, F10, F I4 and WINDING BALSA FI 5 from 1/32nd sheet instead of HOOKS STRIPPERS UNLIMITED TO PEANUT 10" AND 3β" LENGTHS 1/16 th . FLYING: I usually make up my dETEX EIRELE T0W rubber motors about half again as long PLATE as the distance from hook to hook, as COUPE HUBlřDT KIT HOOKE J R U B B ER SC A LE PLA N S FO R S IX (6) this gives me a little extra rubber but PITS: POPSTER 29, KAO FLIGHT-PROVEN, RARE & UNUSUAL still doesn’t affect the balance to any TORPEDO,ř OMR 19 AND 23 RACING PLANES: CROSBY, FLOYD great degree. The model should balance CATALOG “ BEAN, TWO FOLKERTS, SMIRNOFF dIM ERØEKET REPblEAS BEARCAT, and CHAMBERMAID. as shown on the plan (my Paraplane bal­ Complete set, postpaid, only $4.00 anced OK without any added weight). 1442 N. FRUIT AVE. order from: The angles of the flying surfaces and FRESNØ, EA. 93728 CLOUDBUSTER VENTURE thrust-line shown on the plan are as my P.O. Box 2921, Livonia, Mich. 48154 model trimmed o u t... You might need more downthrust and maybe a little Another stop, this time in Liverpool, at the home of Doug McHard. Here, tensive archives of Doug Gillie’s, savor right thrust. Doug and Roly entertained us well into the good Scottish meals (wouldyou be­ I flew this model with a 6 inch the wee hours, showing the extensive lieve fish and chips prepared by Testors prop, from one of the “ ready- collection of scale models, library and ITALIANS in a take-out shop?) and to-flys” , but any good 6 inch plastic engine displays. The following morning prepare for the flight back to Califor­ will be fine. The model will R.O.G., nia, and reality. All told, this pilgrimage but prop clearance is about zilch, so get was devoted to Doug’s guided tour of the famous M ECCANO toy factory. covered some 15,000 air miles plus an­ it trimmed and flying well before you Then, onwards to the highlands of other 2,000 on the ground. All as a try it! We haven’t located an indoor Scotland, breathtaking in beauty, and result of an interest in aircraft. My be­ flying site in my area yet, so my Para­ abounding in the friendliness of the lief in the strong ties generated by mu­ plane has only been flown outdoors. If Scottish people. The perfect place to tual interest was greatly reinforced. you fly indoors, you might need to use “ run down” , relax a bit and review our Everywhere we went, the reception by a prop with wider blades or a lighter rubber motor, as this model, powered experiences. In between visiting mu­ fellow modelers and enthusiasts was seums and airports, that is! Also, a time overwhelming. In a world rendered un­ per the plans, climbs like crazy!!! · out for an excellent meal and aircraft stable by selfish and incompetent poli­ slide show in the home of Tom and ticians, friendships take on a vital im­ Saucer...... Continued from page 35 portance. Perhaps unity created by Joan Black. Tom is a former Lancas­ vator apart along the hinge line, cut a such person-to-person communication ter crewman, and both are terrific shallow "V ” notch out of each half, offers the best ray of hope of a better photographers. just big enough for the wire, and then w o rld . · An all-too-brief visit to the home of glue parts back together. Tank and en­ 3-view draughtsman and aeromodeller gine mounting are not detailed, as this Frank French and family, followed by Peanut...... Continued from page 47 will vary with each builder. an awe-inspiring aerial voyage in a practice (don’t forget to put stringers The original "Killer” was covered French-built Cessna 172, flown by on the fuselage in pairs to keep every­ with “ bullet-proof” yellow Coverite and Charles McLean and Norrie Provan thing squared up as you go), and should clear doped about four times. (where else can one get imitations of present no difficulty. If you will be fly­ Now then . . . load the tank, fire up Dean Martin aloft?) ing your Paraplane only indoors, and the engine, and get a good “ out of the Finally a chance to delve into the ex- want a lighter model (this one weighs circle” launch. Happy flying! · 76 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER HIGH PCHfOKMAHCt

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“The rolled plywood fuselage ts extremely strong and durable and. In iact, is stronger than any other construction technique SULA JAN. 75 1st SULA MAY 75 3rd WING SPAN 1341η. that we have seen /or R/C aircraft fuselages. “ SULA FEB. 75 1st (SC)2 JUNE 75 2nd WING AREA 1005 sq. In. “The JAVELIN wing panels are locked to a center block which N-S MEET FEB. 75 3rd Prec. SULA SEPT. 75 1st & 2nd ASPECT RATIO 18 is pinned and rubber banded internally for a sleek wing mount N-S MEET FEB. 75 WING LOADING 7.2 ozisq.ft. which will pop-off if the aircraft ground loops. The rolled 3rd Disl. SULA NOV. 75 1st plywood fuselage with the itberglass nose cone is tough, straight, SULA MARCH 75 3rd (SCI2 YEARLY 1st JUNIOR and factory pre-painted with white epoxy with a m irror-like 3rd OVERALL1 finish. The fuselage requires no additional finishing." SULA APRIL 75 1st (SC)2 APRIL 75 3rd

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F/F Scale .... Continued from page 45 2R212 airfoils both of which have simi­ flush rivet appearance is desired, select larities to the RA F 34. He also recom­ ADJUSTABLE SERVO ARM either a brass or aluminum tube, the mends getting a hold of the following diameter you want the rivet head. two publications: “ Handbook of Air­ Sharpen the end of the tube so that it foil Sections for Light Aircraft,’’ Rice, is razor sharp. Wherever you want flush M.S. (1971), Aviation Publications, P.O. f rivet detail, just push the tube into the Box 123, Milwaukee, Wisconsin, 53201, surface very carefully. If you push too and “Theory of Wing Sections,” Ab­ hard you're liable to pull out a plug of bott, I.H. and A.E. von Doenhoff, material. This flush riveting detail Dover Publications, Inc. 180 Varick should be done only after you have Street, New York, N.Y. completely painted and finished your The first Flightmasters scale contest model. Usually, this type of detail for 1976 is scheduled for March 28, at looks best only around the cowl areas. Mile Square Park, in Fountain Valley. One useful tool I have around that This will be for rubber scale (no sepa­ I’m sure not many modelers have rate peanut event), gas scale, including This accessory will permit you to preset looked into is the insect pins. These C02. No electric power to be included the required arm length to match any pins are used for mounting and display­ since there is a separate contest for throttle or control surface movement ing insects. The advantage of using electric, April 25th, at Mile Square. that is desired. We now mfg. this these pins in modeling is that they are There will also be a special Thompson accessory to fit the following servos. long and very thin. The size I use has a Trophy event for rubber-powered mo­ Order by Stock No. diameter of .017. This small diameter dels of the Thompson racers. This is .984 each the event in which six models are is ideal for holding down very thin balsa Stk. No. 33 - fits KPS 9 stock without splitting it. Often, when launched at the same time. Rules for Stk. No. 67 - fits KPS 10 building peanut models, the use of regu­ this latter event will be forthcoming. · Stk. No. 4 4 - fits KPS 11 lar pins is almost like using nails. These Stk. No. 45 - fits KPS 12 B i r d s ? ...... Continued from page 61 insect pins also make it possible to use Stk. No. 46 - fits KPS 14 & 15 fewer pins, since pinning through the the means to drastically reduce the Stk. No. 47 - fits World Eng. wood is possible. The only source of bird’s energy requirement . . . soaring! Stk. No. 48 - fits D&R supply of these pins that I know of is During soaring flight, a bird can literally Stk. No. 56 - fits EK Servo Stk. No. 64 - fits KPS 14 & 15 II from biological supply houses. You’d “ rest on the wind”, and I’ve read that have to check the yellow pages of your albatrosses even sleep while soaring. Add .254 on direct orders. telephone book, or check with a high- I’m not sure of this, and I don’t know ROCKET CITY SPECIALTIES school biology teacher for a possible how the reporter of such a “ fact” could source. These pins are truly useful and tell whether the albatross was asleep or 103 Wholesale Ave., N.E. should be on hand for those delicate not; but that’s the story for what it Huntsville, Ala. 35811 jobs. may be worth. (Jim maybe the repor­ I received a nice letter from Frank V. ter was saying that albatrosses "s n o re upon their environment and food avail­ Hansen regarding airfoils. He comments when they sleep” instead o f “ sleep ability . . . and their inclination to that the excellent qualities of the RA F while they soar." w e n ,) “ p la y ” . 34 airfoil are due to its being a reflexed I expect that all birds of prey are airfoil. That is, that the trailing edge capable of soaring, but I’m not sure of The wings of land soaring birds are turns up a little. Excellent qualities are this. In any event, soaring extends the remarkably different from those of sea a trademark of reflexed sections, since hunting “ territory" of a soaring bird of soaring birds; the former having rela­ the moment coefficient (C Mac) is posi­ prey. It seems reasonable to suppose tively short, broad wings of low aspect tive and the center of pressure travel vs. that other birds, including scavengers ratio and the latter having long, thin, the angle of attack is favorable. Frank and fishing birds, can also soar . . . but high aspect ratio wings. W hy? I believe suggests looking into the M-6 and the may or not, or need not, depending the answer involves several hundred

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 77 ed in it to several thousand feet while drifting toward my point of observa­ tion. Perhaps they had “ worked” sever­ al thermals. In any case, they did not appear to be attempting to work back upwind toward the lake, but continued RACE CAR downwind . . . still in the thermal . . . until out of sight. ASSEMBLED WITH MOTOR - LESS “ I know that our sailplanes never got RAD IO G EA R anywhere close to the gulls, even at the Features: greatest altitude we reached; so I would • Cox .049 Engine With Pull Starter • Independent Front Suspension guess that their altitude may have been • "M ag" Wheels more like five thousand feet. • CycoladöBody “ This interesting phenomenon, re­ • High Strength Molded Frame • Centrifugal Clutch peated on three different occasions • Ackerman Steering several weeks apart, raises many ques­ tions in my mind: Did the birds con­ Speed - 20mph; Scale Speed - 240 mph; tinue downwind, hopping from ther­ Turning Radius - 4 feet; Track - 4 % in.; Gear Ratio - 7:0:1; Weight, Less Radio - mal to thermal in their version of a 21 oz.; Radio Area - 2" X 6 % " migrating flight? Did they ever return, perhaps in the evening? Why did they PRACTICALLY MAINTENANCE-FREE WILL ACCEPT MOST RADIOS IN allow themselves to go as far if not mi­ MINUTES - 3 OTHER MODELS TO grating? Were they pleasure soaring? Shown: No. 201 COMANDO - $38.95 CHOOSE FROM. Do gulls often fly overland or between bodies of water in this fastion? Are M o M o il P roducts Inc. gulls inherently lazy, using any kind of 12702 N orth·«! 12«th S o « !. KirkUnd. WMhington 98033 - (206) 827-8606 lift that is available to suit the need?” ) Thermals are scarce over large bodies amount of time soaring over water, far of water and far out at sea. Water is an from land. These birds fly in lift pro­ almost infinite absorber of thermal en­ vided by an entirely different mechan­ ergy during the daytime, giving it up ism . . . horizontal velocity gradients of again only after sundown. As a con­ FOX the wind. They are capable of "dyna­ sequence, sink is the rule over water m ic” soaring. Close to land, they slope during the day, and to some extent, GLOW PLUGS soar over cliffs and rocky outcroppings mild lift, or at least “ zero sink” in the and, of course, sand dunes but seldom, early evening. Interestingly, because of The World's Fin est if e ver in th erm als. land heating during the day, on-shore (The author recently inserted the breezes prevail and strike the seaside following correction to his own com­ cliffs, offering plenty of slope lift; while ment that seagulls do not thermal-wen) at night, because of the temperature re­ (“ It is an error on my part, stemming versal and change in heat flow, breezes from- lack of observation or lack of tend to be off-shore. This condition sufficient observation; having to do happens to coincide fairly well with the with my statement that gulls seldom, sea birds’ habits, probably because they STANDARD SERIES if ever, thermal soar. Wrong, wrong, adapted to these conditions in order to STD. STD. R.C. R.C. survive, finding on-shore breezes useful SHORT LONG SHORT LONG wrong! I stand humbly and abjectly for morning take-offs from cliffside 79C 79C 1.15 1.15 corrected, for the gulls themselves showed me to be in error! nests. “ While flying on three separate oc­ (“ I have since heard that thermals, 2-VOLT SER IES Lead Acid Battery casions this summer in the area of contrary to my belief, do occasionally Horseheads, New York (perhaps 20 form over bodies of water. For ex­ STD SHORT o c a ample, a French pilot recently flew to STD LONG ÖOK- miles downwind of Lake Seneca and Watkins Glen), I saw flocks of gulls the island of Corsica in the Mediterran- IDLE BAR SHORT IDLE BAR LONG 1 .1 5 ranging in number from five or so birds ian Sea from the mainland of France to more than fifteen birds . . . thermal . . . using thermal lift under well-devel­ oped cumulus clouds all the way. The RACING SERIES soaring. On each occasion, the birds were several thousand feet above ter­ pilot reported that the clouds extended STD SHORT -I /IQ rain and all birds were wheeling in a out as far as the eye could see over the STD LONG I.R-v? majestic spiral within what appeared to ocean, and he was tempted to fly to an­ IDLE BAR 1 7 C be a large thermal. Also, in each in­ other (Italian) island, but did not do so LONG I . / D stance, the wind was generally out of for lack of international clearance, and not for lack of lift. Thus I’ve learned FOX MANUFACTURING CO. the north at perhaps ten to fifteen 5305 TOWSON AVE · FT SMITH. ARK knots; yet the day was sunny and ther­ that two well-meaning errors and be­ mals abundant. liefs have been exploded by fact . . . “ After observing these birds drift­ Live and learn ... ”) thousand years of natural selection and ing downwind within the thermals, I Land birds nest in woods and forests adaptation to different environments. reasoned that they had been slope soar­ and find their food nearby in open Hawks, eagles and other land soarers ing or food hunting along the southern fields and scrub or brush copses border­ have available to them a plentiful sup­ shores of Seneca Lake in the vicinity of ing them. In this sort of environment, ply of lift in the form of thermals gen­ Watkins Glen, and had either inadver­ the long and heavy wings of sea soaring erated by differential heating of the ter­ tently been caught in a thermal, or birds are at a very great disadvantage. rain over which they fly. In contradis­ what seems more reasonable, had ac­ Land soarers must be able to fly in and tinction, sea soaring birds spend a large tively sought the thermal and had soar­ out among closely spaced branches and

78 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER 3 SEMI-SCALE R/C HELICOPTERS! DU-BRO

TRI STAR ^ ^ ONLY » 2 .9 .9 5

* HUGHES 500 BO D Y S H O W N N O . 510 BO D Y KIT TOGETHER CONSTRUCTION ONLY $34 95 • MINIMUM BUILDING TIME * • EASY STEP BY STEP INSTRUCTIONS • INTERCHANGEABLE A.B.S. MOLDED BODIES • SIMPLICITY IN DESIGN AND CONSTRUCTION OVERALL BODY LENGTH IS 36" FLYING WEIGHT 6 TO 7 POUNDS, ROTOR SPAN 45". KIT IS COMPLETE EXCEPT FOR ENGINE. 8 OZ. FUEL TANK AND A GOOD FOUR CHANNEL RADIO. BESIDES THE SCORPION BODY INCLUDED WITH THE KIT, CAT. NO. 508 - THE DU-BRO TRI-STAR IS AN EXTREMELY RUGGED. THERE ARE TWO EXCEPTIONAL LOOKING BODY KITS FOR SEMI-SCALE HELICOPTER FEATURING ALL METAL BOLT-TOGETHER THE TRI-STAR. THE ENSTROM NO. 509 ($29.95) AND THE CONSTRUCTION, A. B.S. MOLDED BODIES, HEAVY DUTY STEEL GEARS, HUGHES 500 NO. 510 SHOWN ($34.95) WHICH CAN BE IN­ 16 BALL BEARINGS THROUGHOUT AND CAN BE BUILT EASILY IN A TERCHANGED IN A MATTER OF MINUTES.WHIČH EVER YOU MINIMUM OF TIME. ADAPTABLE TO MOST .40 ENGINES. IT COMES CHOOSE, WE ASSURE YOU THAT THE DU-BRO TRI-STAR IS EQUIPPED WITH A DUAL COOLING SYSTEM, SPECIAL HEAT SINK, AN OUTSTANDING PERFORMER THAT WILL GIVE YOU COOLING FAN AND UNIQUE PULL STARTER SYSTEM. MANY HOURS OF FUN AND ENJOYMENT. DU-BRO PRODUCTS INCORPORATED1 480 Bonner Road W auconda, Illinois 60084 U.S.A.

WANTPearls Take U.S.F.F.ID W IN? 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 5250 Gulfton, Bldg. 3-D, Houston, Texas 77036

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 COMBAT N E W ! R/c BOAT • 45" LENGTH OVER ALL • 20' WATER SHOT PUMPS AND GUNS • POP-OFF SCORING DEVICES • MULTIPLEX SWITCHING • INTEGRATED DRIVE SYSTEMS • "DRY FOOT" LAUNCHING a n d MORE ! ! IL L U S T R A T E D L IT E R A T U R E - 50 Cents SWANK PRODUCTS CO., 729 W. 16th St., COSTA MESA, CALIF. 92627 PHONE: (714) 642-4227

notes on sailplane designs employing the first panel, or you’ll have dihedral IS IT A STRUT? short vs. long wings of different aspect in one, and anhedrai in the other. IS IT A RUDDER? ra tio s.) For beveling sheet, block, and strip Absent the woods and branches stock, the adjustable tilt table may be NO, IT'S A STRUDDERII which limit the spans of land soarers, used without the long dihedral tongue. the wings of sea birds can afford to be In this case, the “T ” alignment jig is long and thin. Such wings have inhere­ located in the groove on the tilt table, ntly lower induced drag, hence better thus keeping the material perpendicular gliding performance, than low aspect to the sanding block. Bevels up to ratio wings. The long, high aspect ratio about 50 degrees are possible. wings require deep, strong “ spars” and Users of cyanoacrylate glues, such consequently have much greater weight. as “ Hot Stuff” , will really appreciate Thus, kites, herring gulls, skuas, cor­ the precise bevels made on the Miter morants, gannets and other sea birds Sander, as this type of glue requires a have superb equipment for their envi­ perfect mechanical joint. And on any­ ronment. Nesting on cliffs, they can thing but the smallest of strip-wood almost always find slope lift in the pre­ joints, you can’t beat the precision vailing breezes, scarcely needing to flap work of this tool. in order to take-off. When grounded The Deluxe Miter Sander kit sells for on land, albatrosses (Gooney Birds) are $24.95, and the Standard model, which able to rise only with the greatest diffi­ handles materials up to 10-1/2 inches culty, and sometimes not at all. They wide by 1-1/2 inches high, sells for lurch and stagger, amid great flapping $14.95. The latter does not include the $ 2 0 ? 5 and scramblings . . . assisted by what­ dihedral tongue unit. · FO R MONOS, HYDROS, AND T U N N ELS ---IDEAL FOR DEEP VEES. ALL ever amount of breeze they can find ... ALUMINUM PARTS ARE EXTRUDED until airborne. There, they become the Choppers .... Continued from page 22 HIGH STRENGTH ALLOY, RUDDER epitome of soaring grace, beauty, and straight as it makes its take-off roll! BLADE IS STAINLESS STEEL, HORNS efficiency. ARE GLASS FILLED PLASTIC.FULLY During flight, the rotor is kept in con­ ADJUSTABLE FOR TURN AND Next month, ]im gets into the geo­ stant autorotation by the oncoming air- STRAIGHT AWAY TRIM. BRASS metry and structure of soaring bird’s stream. As mentioned above, a hefty WATER PICK-UP TUBE INCLUDED. wings, wen · engine is required to overcome the re­ S E N D 25 FOR CATALOG 1 sistance of the fuselage, the accessories, OCTURA MODELS Sander...... Continued from page 23 and the rotordisc, which in some cases P.O. BO X 536 locked to the flat, or zero position. can be of quite noticable value. ■ I «0011 «*0101 I PARK RIDGE. Next, the dihedral jig is slipped into the I l SUPPLIES J Constructionwise, the Helix is very IL L IN O IS 60068 tongue groove and the wing is set in straightforeward and can be completed place. By sliding the jig toward or in 4 days, including paint and trim. I thick foliage. Hence, natural selection away from the root, the proper di­ began by cutting out the fuselage for­ processes have given them shorter wings hedral is set, and the wing is rubber mers and cementing them in place. suited to this environment. Happily, banded to the jig. Now the root of the Three basic formers, gusset plates for short, broad wings of low aspect ratio wing is aligned with the sanding block the engine, landing gear, and rotor-shaft are superior for thermal-only soaring, by lightly operating the block while complete the basic structure. The main more so than the long, thin high aspect easing the wing toward the block. Once gear is held in place with two nylon ratio wings of the sea soarers. Wings of things are lined up, the wing is gently shear bolts, and the tailwheel fork is low aspect ratio provide great area at forced against the block with one hand, bolted into a small plywood gusset at little cost in weight, because the “spar” while the other moves the block back the rear of the fuselage. Five-minute strength need not be so great and and forth, sanding in the required bevel. epoxy was used throughout except for weight so heavy, as in sea birds. Short, Use the course grit first, then the finer. the engine and landing gear plates, light-weight wings are excellent for The opposite wing panel is done in where Stabilit Express is recommended. short turning radius, because of low the same manner, but watch those The horizontal stabilizers are built inertial moments, enabling their owners nearly symmetrical wings! The leading up from 3/8 inch balsa strips and to circle tightly and quickly in even the edge of the second panel must be at the covered with 1/16 sheet balsa. They smallest thermals. (See Appendix for opposite end of the Miter Sander from are held in place in the same manner

80 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER NEW...TEMPERATURE COMPENSATED NYROD A ROD FOR ALL SEA SO N S

NEW 8" METAL ROD IS PERFECT FOR THESE INSTALLATIONS - BEND AS NECESSARY NYROD inner tubing iiymimimunq NEW! 8" METAL ROD SU-PR-KLEVIS as most sailplane wings, with 1/8 inch music wire spars and brass tube guides. DUBBER POWERED FLYING MODELS The Helix has no elevator, since atti­ KITS · PUNS · ACCESSORIES tude is controlled by a conventional KITS swash-plate driving the stabilizer pad­ NOW AVAILABLE p£CK PIETENPOl $3.29 MILES S3.29 dles and rotor blades. Direction control TURBULENT $3.29 is maintained with a more-than- R.O.G. PIPER CUB $3.29 adequate rudder carved from a solid ANDREASON $3.49 SUPER EASY TO BUILD COUGAR $3.49 balsa sheet. MUSTANG $3.49 FLYS OVER ONE MINUTE The HP 61 engine was mounted on ZERO $3.49 a Kraft motormount without down- $1.39 SPORT MODEL KITS thrust or side thrust. The plastic engine STRINGLESS WONDER $2.49 PECK R.O.G. $1.39 cowl was then cut to fit and throttle HANNAN PLANS -90 TO PICK FROM push rod installed to complete the NEW "76" CATALOG 25« JAPANESE TISSUE — RUBBER LUBE — HUNGERFORD WHEELS HAND TO KIND ACCf$SO*/f5; KITS AND power pack. Kim, who is the engine A l l SIZES OF PLASTIC PROPEllERS HANS fO f BUBBfB řOW fffO MODUS expert in my family, insisted upon PECK-POLYMERS P. O. BOX 2498 MB LA MESA, CALIF. 92041 using a 12 oz. fuel tank because of the PHONE I7MI 440-3164 or <7141 466 8675 high fuel consumption. A Schluter swashplate is furnished, with the main rotor shaft. This little with the instructions. Final pain assembled, as well as the Cardon head, jewel looks exactly like a typical "stab­ scheme was K & B Super-Poxy Orange. which needs only a 10 minute assembly ilizer paddle-bar” roller bearing . . . it All that remains is to fly the beast to the rotor hub. The upper bearing is a roller bearing when the rotor is And that is where my 4 days ran out mount is then installed on the pylon autorotating, but grips the main shaft I'm not too sure I would have flown i and the main shaft inserted through the firm ly when the pulley drives the rotor. if I did have the time, 'cause I wantet fuselage. The biggest surprise of the en­ To make a long story shorter, 4 to study up on my gyrocopter theory tire kit was the free-wheeling clutch, channel radio was installed and the pro­ before launching it. I did, however which connects the starting pulley shaft per adjustments made in accordance come up with different method of try

S a ilin g ...... Continued from page 22 back, will probably have to fall off to clear their air, as tacking on a leg that is a straight shot to the next mark is suicide in all ■*- % but the most extreme cases. Before turning away from the lake, the photographer took V a shot that was 45 seconds into the race. The 757 boat had drawn out to 5 boat lengths, 413 and 75 were still gunwale to gunwale, 392 had passed 374 to leeward and was drawing up on 498. The eventual finish I do not know, but I am certainly a believer in the words of one skipper, who claims that a good start is 40% of everything required to win a race. In retrospect, the fellow who won the start, did so by ob­ serving the rules for light-air sailing. He kept his boat moving, made broad sweeping turns, avoided the influences of other boats, and took no chances in interacting too closely with other boats. As I pointed out, handing your opponent 2 foul points in no way enhances your own score. A collision may leave you dead in the w ater. . . dead right at the protest meet­ PLUS 25 SECONDS: As the parade to the weather mark be­ ing, but dead in the water as if you’d been wrong. gins, we see the benefits that clear air can bring. No. 757 has In future columns pointed at the racing skipper, w e’ll touch already stretched out a boat length and has come up to on mark rounding, tactics on the weather legs, and a little bit weather a little high of the course in order that any boat that of the racing rules which apply in such situations. The A M YA tries to overtake her will have to sail below her and through racing rules are now being studied by a committee headed by her bad air. A good tactical manuever on 757’s part and one Rich Matt and members Rich Whan and Sandy Littlejohn. that will consolidate her lead. The rest of the heat is left just Contact any of those fellows with your questions or sug­ about where it was, with little chance for escape, the only gestions for revisions. I’ll field questions directly at 7608 Gre­ boat with half a chance being No. 392, who ought to be able sham St., Springfield, VA. 22151, or in care of MODEL to sneak by to weather of all of them. The others, from 75 on B U I L D E R . · FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 WACO ATO · GULFHAWK ΙΑ·0-43Α X Jef’s Friends o ώ (with the h elp of o co m p u ter) to b e PR IC E LIST ώ the strongest, least expensive and $39.95 Postpaid T ο easiest flying craft possible. But R/C O TYRO MODEL & SUPPLY PETER WESTBURG ώ Modeler reported in their August 75 --1 issue that the W estern W ind d oesn't P . 0 . B o x 1 1 5 1 1 , Palo Alto, Ca. 94306 834 Seventh St. No. 6 >.. do what we claim. RCM gave the Phone: 321-2898 Santa Monica, Calif. 90403 oo Western Wind a poor write up for one reason, the product review was b a s e d on guesswork a n d hedrsay. I know why the starter pulley is there; As mentioned last month in this col­ RCM did not even bother to fly a that rotor just won’t self-start at any umn, you can get landing skids all bent W estern W ind. W h at a w a y to test a speed! to shape and in several diameters, di­ kitl W e know th at RCM is w rong. That's This next week-end, I’ll give it a rectly from N FFS Supplies and Service. why w e 're m aking this ch a lle n g e , W e go at the local fly in ’ field . . . (if I can Until next month, may all of your invite RCM, the modeling press and get up my nerve). ‘Till later then, with rafters be soft and your rubber unbreak­ p u b lic to, a full report, BCNU. · able. May your skies be blue and your 1. Observe a Western Wind being flown by one of Jefs Friends at a flights be maxes. May you be where the m utually a g re e a b le slo p e site so F/F ...... Continued from page 53 soft winds blow and the thermals are that RCM can see how well it flies. friendly. This, as heavenly as it sounds, several metal files. A tap will be needed 2. Test the Western Wind with a pilot is likely to happen the day after you’ve ch o sen b y RCM w ho shall atte m p t to provide the threads for the 4-40 set returned to work. to c a u s e it to crash into p ie c e s screw. Takes a bit of time . . . usually upon impact as claim ed in the Thermals. · RCM review. one evening will do it, but the results No Western Wind we have ever are really worth it. Using a set screw, C/L ...... flown has broken up on impact. In you can replace the skid with a differ­ Continued from page 37 fact however RCM crashes the West­ ent one should the original become bent something wrong, yet the official AM A ern W ind it will p ro b a b ly rem ain fly- a b le with no repairs w h atever. WE completely out of shape. You will need literature says the handling of the mat­ WILL SUBJECT THE WESTERN WIND TO to file a flat on the wire, where it will ter was upheld. From this, I guess we PUBLIC SCRUTINY. WILL RCM ACCEPT come in contact with the set screw . . . can assume that sometime in the future, so that the screw has a contact surface. one of us can be hassled about most The skid assembly is held in place by anything without any regard at all to the same bolts which hold the engine what the rule book says. If it was OK mount to the firewall. once, I guess it is O K to do it again. Oh If you have trouble locating sheet yes, you can get three guesses as to who metal of the necessary size, try the wrote the above quote in the AMA scrap bin of a local heating and sheet- Monthly Mailing. And the first two metal shop. Quite often, such metal is guesses don’t count, the question is so available from an auto junk yard, too. e asy! Give them a try. If you'd like to perform the test your­ To recap a little, I want you to no­ self, or perhaps just want to learn to If you don’t care to remove the skid tice that the whole thing started be­ slope soar, se e your h o b b y d e a le r or from the model, you can build it in as cause Carlos didn’t have the right num­ order from Je f’s Friends, Box 511, Bris­ part of the structure, but be careful. bers on his plane. So Carlos started the bane, CA 94005. On direct orders send S I2.95 plus Sl.OO handling. You must fasten it very securely in the whole thing when it comes right down C alifo rn ia residents a d d S 78 tax fuselage, using thread or wire, and to it. And he didn’t help any by simply please. C.O.D.s accepted. Dealer epoxy. Ideally, it will be surrounded by ignoring jean Pallet’s initial letter. This and distributor inquiries invited. metal, or held in place by J bolts. letter should have been answered, even Where the wire exits the fuselage, it if all he did was to quote the rule book ing it on for size! I talked my boys into should have a metal shield (see pix). I to Jean. The contest was over, no pro­ mounting it on the top of our pick-up used such a set-up on my Dixielander test was filed, so Carlos didn’t need to truck and drove down the road to see . . . the upper leg of the gear was bent defend himself in any way. But he how much lift was developed. Boy, was and inserted into the spruce leading could have at least acknowledged jean’s I surprised when the rotor streamlined edge of the pylon, and the gear exited letter in some way, which would pro­ into the wind and refused to rotate! on the bottom of the fuselage. The en­ bably have kept the matter from going After much experimentation with tire structure was bound with thread to john Worth, who really botched different speeds and angles of attack and epoxied together, then a piece of things up . (with no luck), I got the idea to spin 1/16 sheet magnesium was placed over Even though Carlos started things off the rotor by hand to get it started. the gear at the exit point. This did the with an illegal plane, lax C D ’ing helped Sure ‘nuff, given a good hand-spin while trick for 4 years. things along, and then Carlos ignored driving about 20 mph, it suddenly star­ Last October, the gear finally broke the letter from Pallet. The real pro­ ted into autorotation with the typical loose inside the fuselage. blems came when Pallet and Worth tried swish-swish sound, and really wound In parting, the gear will last a long to make up their own rules, ignoring es­ up! The lift was fantastic, and it was time if all joints are metal to metal. tablished AM A procedures. I have to go all we could do to hold her down. Now Anything less will not be satisfactory. “by the book” and so do you. Why

82 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Ί

PROFI ENGINES A NEW SERIES OF ENGINES FROM NELSON MODEL PRODUCTS.

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FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 THE LIBERATORS are here!

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an official protest in hand, there could S ig P-51 S tu n te r o n e m o re tim e. A s be no justification for approaching Car­ you may recall, I recently built a Sig COVERUP! los with questions, let alone threatening P-51 fo r p ra ctic in g the A M A S tu n t p a t­ his 1975 competition status. tern. I built my plane pretty much ac­ Sturdy, dark green vinyl covered Now you know what happened. But cording to the plans and I like it just binders for your valued copies of what came of the whole thing? Not fine, but Arlie Preszler, writing in the MODEL BUILDER. Gold logo. much. The word was put out that pro­ Headwind newsletter, goes over a few cessing at future Nats would have to be (?) mods he made to his Sig P-51. a lot tighter so something like this "I usually enjoy throwing a kit or wouldn’t happen again. OK, that’s two together after the contest season good, but what else got settled? No­ is over . . . sort of a no-brainer building thing. Evidently |ohn Worth and Jean orgy before settling into a time-consum­ Pailet still feel they did good, as they ing scratch-built design. When I saw have not said otherwise. that new Sig P-51, 480 sq. in., 41 oz. If you would like to voice your opin­ (12.3 oz./sq. ft.), I saw the opportunity ion about the Aloise incident, I would for a Veco 19 powered ‘A ’ ship for next suggest that you write to the V.P. of year’s WAM contests that would build your District and let him know how rather quickly . . . and with just a little you feel. He'll listen and take action if bit of weight reduction, would be real he hears from you. It’s your turn.how competitive. Now that I am into it, are you going to handle it? however, I wonder if it would really That’s enough of the serious stuff, build at 41 oz. straight from the kit. let’s move on. “ I could not force myself to build Only S4.95 each, two for $8.95, or From the Odds and Ends Depart­ as the kit provided. The first thing I did three for S12.95, postpaid in the US. ment of the Eugene Prop Spinners was throw out the 1/16 wing sheeting Canada and Mexico add 30 cents per newsletter, edited by Mike “ Nitroholic” and substitute contest grade 1/32 for a binder. Overseas add 50 cents each. H azel. weight saving of 2 oz. Lanny’s crash at California residents add 6% sales tax. “ An interesting engine reported on the Nats showed that a couple of pieces NOTE: One binder will hold 1971 and in Aeromodeller magazine is the Piorun of strapping tape and 1/32 sheet makes 1972 issues. One each for 1973 and 1974. 50 made in Poland. It features an ex­ a wing that is tougher than the rest of haust port which faces forward, toward the airplane. I also violated what the in­ MODELS the prop, and severely retarded timing. structions said and used ‘Sig Foam BUILDER (?) Really! Bond’ instead of ‘Sig Core Bond’ for “ Recently I bought a Sig kit. Packed sheeting the wing . . . it works fine for Box 4336, Santa Ana, Calif. 92702 in the box was one of those AM A F/F me and saves another 1 /2 oz. I cored identification slips which read, ‘This is the wings, leaving two foam spars, Bob should AMA HQ think the rule book an experimental model which may be Hunt fashion, and the cores I took out doesn’t apply to them? lost in flight.’ I certainly hope this is weighed a whole ounce. Sig cuts the Some may feel that HQ was some­ not an indication of things to come, as highest grade balsa that there is, but I what justified in hassling Carlos, as his this was a C/L kit! cannot understand rock hard material entry was not legal, due to the wrong "Exercise caution when working for the wing leading edge . . . this is a numbers being on the plane. I feel with a torch, lest you make an ash of Stunt plane, not a hand launch glider otherwise. As far as I am concerned, yourself.’’ that’s going to fly into chain link fences Carlos could have used a 40 on his Pro­ Thanks for the n/l Mike, but how . . . I saved another full ounce by substi­ file Carrier. Carlos entered a plane, come you didn’t show at our Turkey tuting my own Sig Contest balsa. The was allowed to use this plane, won with Combat Meat (sic)? Combat too ex­ wood for the flaps was better, but I still it, and nobody filed a protest. Without citing for you???!!! knocked off 3/4 oz. by using wood

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from my own supply. This all adds up to a supposed saving of 5 oz. on the wing assembly. I also added a little Model Aeroplanes dihedral to the wing, since the distance η A Splendid Gift from the centerline of the wing to the Bill Hannan’s Peanut ver­ sion ol the ■’Ideal” Nieu- engine th ru st lin e is 1-1/8 inches and a port Basswood and balsa • WORKING TURNBUCKLES Nobler’s is only 1 ” (a larger airplane) - construction tissue cov­ • RIGGING & CONTROL CABLE ered Complete kit . CONTROL HORNS r— It should help the flying characteristics, white tyred simulated spoke wheels, plastic prop · STRUT FITTINGS having the leadout location closer to the jnd thrust bearing, pnntwood. reed, rubber strip and detailed • S H O C K C O R D center of gravity. I also added adjus­ Instruction Manual 54 49 »55.00 securely packed and post paid I N J bu> ^\ add S'* sales la* • C O C K P IT TRIM table leadouts, a suspended bellcrank Peanut Plan Special l ise Peanut Si/e Kit Plans WW| and • P U L L E Y S mount, and accessible tip weight box. Golden Age Biplanes SI 50 post paid Scratch Builder Super • INSTRUMENT HOUSINGS Offer’ Plan set and pnntwood lor all five models. SS 00 post­ “ I was originally going to tolerate paid \ I buyers add 5'- sales tax t For iddition«! informotion. brochure end catalogue tend O.SOt PROCTOR ENTERPRISES INC. the slight weight penalty of the ABS VINTAGE AERO 20 page Catalog 51 00 P.0 BOX 9641 plastic parts to 1/4 inch plywood bases DEALER INQUIRIES INVITED SAN DIEGO. C A 92109 DEALER INQUIRIES INVITED and used them as molds. Soaking some u rco . AT 6 0 2 1 CONVOY C T . SAN D I COO C A. 1/16 balsa and pulling it over the VINTAGE AERO forms with stretch bandage and allow­ I THE GLEN · TENAFLY. N J 07670 Combat and a 15 for power, and WAM ing to dry, resulted in light-weight Ά ’ Combat with a 19 for power. molded balsa parts saving another company trying something new in a ounce. The fuselage sides are some­ Stunt kit, and if I can come up with Soon to be released is the Matador, what hard balsa, but the weight saving some constructive criticism when it’s another design from Rich "von” Lopez, would be very slight in substituting bal­ all done and trimmed out, I’ll pass it and for AMA (Fast) Combat. A C/L sa . . . besides the neat printed sheets along to the manufacturer. Meanwhile, Stunt ship is also in the works, but I are what I have been advocating for this kit is to be praised for its complete have no info on when it will be released. years. The tail assembly wood is of ex­ hardware package . . . it even has a tail- Soon I hope, for the Stunter will be the cellent quality and low density, but 1/4 wheel . . . and the excellent Sig nylon Genesis, designed by Bob Hunt. This inch stock is a little thin for competi­ bellcrank." will be the first .45 powered Stunter to tion use . . . I'm substituting very light That ought to give you some ideas to be kitted by any manufacturer. The 3/8 material. try out if you are a Stunt Freak. Inci­ Genesis is a well-proven design and Mid­ “ Well, so much for the quickie no- dentally, the strapping tape Arlie men­ west puts out good kits, so I’m really brainer building from a kit. I’m not tions goes from wing tip to wing tip on looking forward to this one. sure where things will end up, but if the both the top and the bottom of the I have a Lil Snip built and ready to 41 oz. on the box is correct, I should wing and the sheeting goes on over the fly, but the weather has been rotten end up with a 35 oz. airplane. After strapping tape. Adding the strapping lately, so I haven’t tried the plane out substracting the savings made above ... tape is a good trick, it’s been used in yet. Next month I’ll report on the kit that would be real nice . . . I’ll let you R /Ο for quite awhile, and will do a lot from start to finish, but right now I can know what happens. Please, do not towards preventing a folded-up wing, tell you that the Lil Snip is sure easy to take all this as an indictment against when the wing is subjected to high-G build. Nothin’ to it! Sig, for it is not. Many of the things I manuevers. Looks as if Midwest is If you read the F/F column in MB, and other compulsive scratch-builders definitely serious about the C/L market. you noticed that Bob Stalick mentioned do are not practical as kit features, and It is cranking out new C/L kits like me in his column in the November ‘75 besides, if Sig put all of their best wood crazy! As I write this, the Lil Snip, for issue. A couple of things Bob men­ into kits, I wouldn’t be able to pick and .049 Combat, is available. To be re­ tioned need to be set straight! First, I select the best whenever a new ship­ leased by the time you read this is the don’t fly a “beat-up 1/2A Gassie” in ment of contest grade material comes Firefly, designed by "Fast” Ed Brident F/F! I am currently using a plenty sani­ into the hobby shop. I appreciate a and Rich “von” Lopez, for both FAI tary Orbiteer in 1/2A and also fly B

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 R/C ELECTRIC FLIGHT SYSTEMS • Patent Pending

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86 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Gas, Nordic A/2, HLG, Peanut Scale and assorted rubber-powered Sport F/F planes. Last time I saw Bob was at the Hawks Power Bash, at Hart’s Lake Prairie, in Tacoma, Washington. He was FOR RC MODELERS having every kind of problem imagin­ able, right down to not even being able to get his foo-foo motorcycle to run! I / C 5 6 tried to help him a couple times but not BONDS VINYLS even Dirty Dan could help much. Most of his planes had so many things wrong with them, I couldn't figure out what to BUTYRATE fix first!!! And he says that I fly a beat- STYRENE - FOAM up 1 /2A Gassie! WILHOLD GLUES, INC. Also, Bob misunderstood my chal­ 8707 Millergrove Or., Santa Fe Springs, Calif. 906701 2943 W. Carroll Ave., Chicago, Illinois 60612 lenge to him, so I guess I’ll reissue the challenge right here in the C/L column. < NON-TOXIC · WATER RESISTANT I, Dirty Dan, being of filthy mind and hirsute body, do hereby challenge • A n t iq u e F.F. A V R O - B L E R I O T - Bob Stalick to a get-down, get-dirty . Coupe d'Hiver CAUD RON - PT-1- HLG/049 Combat contest. HLG to be •R/C Scale LINCOLN BEACHEY flown in rounds with both fliers launch­ Aircraft Materials • S p o rt ing at the same time. Last one down wins that round, each flight counts, and For the finest quality wood products the winner of 4 out of 7 flights wins. available. SPRUCE - PLYWOOD - The 049 Combat is to be flown pretty BALSA WOOD - FAA AIRCRAFT much by AM A rules as far as scoring is SPRUCE (up to 60" lengths). concerned, first to win 4 out of 7 1/64" Birch plywood. PREMIUM matches wins. Prizes are to be small grade balsa wood. Send S.A.S.E. for brown bottles containing liquid refresh­ a free catalog and order form to: ment and will be furnished by the loser. Superior Aircraft Materials As I am doing the challenging, I guess I P.O. Box 8082 say let’s do it at the ‘76 N.W. Regionals Long Beach, Ca. 90808 (a C/L contest) to be held Memorial Day weekend in Eugene, Oregon. All for more info, call (213) 421-3935 Distributor Inqulri·· Invited flying to be done Saturday evening. Monday to Friday, 9 A.M. to 9 P.M. Well, Bob, how about it? I already sent you plans of the GollyGeeWhiz, Have you tried any of the new, super none of the glue joints have failed. As Gene Pape says he thinks he can make a glues yet? You know, Hot Stuff and the planes were flown fast and hard Combat flier out of you, and you al­ Zap. If you haven’t, you are really (lots of square loops, square 8’s and ways seem to show up at the Regionals missing out on a new building (and 180° pullouts from wingovers) some­ a n y w a y . repairing) experience. They really work thing would have let go if the glue joints Now I have challenged Bob. Only as advertised. were weak. In fact, one of the planes question left is whether or not I really Building with Hot Stuff or Zap is a was twice bellied-in at about 90 mph can beat him. Can Dirty Dan beat Bob little more expensive than using Tite- when the motor went too lean (I’d Stalick? Hey! Is a bullfrog waterproof? bond, Willhold or 5 minute epoxy, I’ll rather break a prop and maybe break a I like to kid Bob, but he does write agree to that. But if you have more plane than listen to an engine do bad an excellent column for MB, much bet­ money than time, you’ve just gotta at things to its piston and cylinder). The ter than the C/L column! Check out least try building one plane with Hot plane was not hurt in either of it’s short, what he has to say, you’ll be glad you Stuff and then deciding if the glue is high-speed landings. So a plane put to­ d id . as expensive as you once thought. gether with Hot Stuff is plenty strong, Speaking of F/F, which we are in a I just finished building a pair of Ne­ I have proved that to my satisfaction. way, did you read about the past F/F mesis M’s and I used Hot Stuff almost But repairing bent planes is where World Champs? I did, and was very exclusively in the construction. Devcon Hot Stuff and Zap are really handy. pleased to see that the ceremonies pre­ 5-minute epoxy was used to glue up the Bent planes always have to be put back ceding the actual competition featured motor mounts, install the bellcrank together with everything kind of hang­ Combat matches and Stunt flying! platform, attach the leadout guides, and ing in the air, as they generally can’t be Most important F/F meet in the world to put on the center section sheeting pinned back to that nice, flat building and a stadium full of people going nuts and LE sheeting. Titebond was used to board. Also, many of the broken pieces over Combat and Stunt! But can you glue the TE pieces together but Hot are hard to pin into place. With a super imagine how disappointed those people Stuff was used to glue the ribs to the glue, you just hold whatever piece you must have been when they went to the TE pieces. Titebond was also used to are gluing in place, put on a drop of contest site expecting to see more Com­ glue on the capstrips, but only after glue, hold for a few seconds and reach bat and Stunt and, instead, saw a field they had been tacked in place with a for the next piece to be glued. full of contestants throwing missiles teeny, tiny drop of Hot Stuff at the I keep a bottle of Hot Stuff in my skyward only to watch them float back front and rear of each capstrip. Show-Biz toolbox for fixing Combat to earth?! Yuk, yuk! Think about that. Everything but the planes at contests . . . right in the mid­ So much has already been written above-mentioned exceptions was put dle of matches! Say you stuff in your about the next item that I hesitate to together with Hot Stuff. Yes, I even Slow Combat plane. The fuse breaks at even bring it up. However, C/L fliers glued the booms on with it! The planes the TE of the wing, the motor gets dirt are, as a rule, a pretty skeptical bunch both came out light, are durable, and of in its throat and your prop is now in and need more convincing than most to course, went together very quickly. three pieces. Two years ago you were try something new. Each plane now has a dozen flights and out of luck when this happened, but

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 not now. By the time your buddy can CUSTOM R/C CAR COMPONENTS change props, flush the dirt out of the venturi (or shove it in further) and put INC. a fresh load of fuel in the tank, you can have the fuse glued back together and be back at the handle waiting for the plane to be launched. This can be quite shocking to your opponent, if he hasn’t heard about Hot Stuff! Be careful, though. If you get a drop of Hot Stuff on your hand while fixing the plane, you may find yourself glued to the han­ dle at the end of the match! If you are serious about contest fly­ ing (or sport flying, as a matter of fact) you should always have either Hot Stuff or Zap close at hand for emergency re­ pairs. I wouldn’t think of going flying without having some super glue around for putting things back together. HRE WINS 1975 R.O.A.R NATIONALS My apologies to the best (and only!) EXPERT OVAL RACE! C/L flier in Dekalb, Illinois, the one and only Bill "Moose” Allen. I asked Bill to HRE performance makes the difference. Look at the send me any information he had con­ record in the big races. cerning the contest he put on last Labor Day. Bill sent a ton of stuff, but due to 1st. Expert Oval. 1975 R.O.A.R. Nationals me losing track of it for awhile and a 1st. Expert Road, 1975 R.O.A.R. sanctioned slight mix-up in the deadline date for WINTER NATS. last m onth’s column (it was cranked-out in only a couple hours and on very short notice), I was unable to report on COMPETITION CHASSIS...... $144.95 HRE Bill’s super contest. Please check out Includes all hardware, except engine, radio, the Round ‘n Round column in the Jan­ fuel tank, and body. Send for free catalog. uary ‘76 issue of MAN for Harry Hig- ley’s report on Bill’s contest. Aero Chal­ HRE Inc., P.O. Box 4658, Irvine, California 92664 lenge for Muscular Dystrophy. The WRAM SHOW 1976 F e b r u a r y 2 8 & 2 9 Westchester County Center, White Plains, N.Y. 1976 Promises to be the Biggest and Best Yet! j It's W RAM 's SHO W time again and 1976 is shaping up to be the largest Show e ve r... 3 full floors of the W estchester County Center with well over 100 manufacturer's booths, thousands of square feet for models and a whole third floor for the.Swap Shop. Make sure that you finish up your latest creation so you can have a chance to take home one of the dozens of | trophies to be offered in these events: W W I, POST W W I (Military), POST W W I (Non-Military), PATTERN. SPORT BIPLANE. OLD TIMERS, SPORT. PYLON GLIDERS. HELI­ WESTCHESTER RADIO AEROMODELERS. INC COPTERS, R/C BOATS, STAND-OFF SCALE. BEST JUN- w IOR AND BEST-IN-SHOW. Special Swap Shop Note Over the past few years, the Swap Shop has been inun­ dated with built-up m odels making it extremely difficult to fairly display them all. To provide maximum exposure of each built up model on display in the Swap Shop. 1976 !Show hours are 10 AM to 6 PM on both days. Swap Shop Registration tor complete models and air- IIt's a weekend you can’t afford to miss . . . trames will be limited to one per registrant. ·.see you there. Make sure you make your plans now . . . 1976 will be the IFor further information, write to Frank DeVore. biggest and best WRAM 's SHOW ever! 18 Grove Ave., Larchmont, N.Y. 10538.

88 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Moose put in an unbelievable amount of work to hold this contest, and Bill’s efforts are a great example of what can W .W .I MODEL ACCESSORIES be done by one person, let alone a whole club. Project Goodyear is coming along slowly. John Kilsdonk convinced me to try his Falcon Special and sent along a set of plans, so that is the plane we will be using. A custom-built Rossi has been ordered from George Aldrich (may take awhile to get it) and I guess the G/Y cheek cowl controversy has been set­ tled finally. VINTAGE LE RHONE ROTARY ENGINE KITS Ideally, the series of Project planes WHEELS AVAILABLE IN I 'h ' will be supplemented by photos, but AVAILABLE IN AND 2" SCALES my camera just had a seizure of some Va" THROUGH ENGINE CYLINDERS kind and I can’t afford to replace it 5" DIAMETER now, so we may have to wing it as far SCALE PILOTS as construction photos are concerned. AVAILABLE IN However, Badyear Freak John Penhal- r , r'/j", r low has come up with an exploded-view AND 2s/a" drawing of basic Badyear (OK, Good­ SCALES VARIOUS TYPES & SIZES year, Scale Racing, whatever . . .) con­ SEND 25c FOR COMPLETE ILLUSTRATED CATALOG struction that we can use and that will help som e. DEPT. MB · 181 PAWNEE STREET The Clary Corporation has filed for SAN MARCOS, CALIFORNIA 92069 bankruptcy. So what, you say? So listen up, turkey. Remember the Veco on top of the shade. She’ll surely under­ line of accessories? K & B sold this line stand why I don’t fuss about the skele­ Soiling Yachts for to A & L Mfg. about two years ago. ton wings of the DH-10 pinned to the A & L ran out of room for manufac­ grass-cloth wall paper in the family Radio Control turing the tanks, control horns, spin­ room. After all, that plane has only ners, etc. and sold the line to the Clary been in research for three years. I took Corporation almost a year ago. Now a peek at the paper behind the sections, TAHOE 600 Clary has problems and the old Veco and the whole wall has faded. So even line of accessories, so important to when Bill assembles his plane . . . let’s many C/L fliers, are going to be in short hope it’s his Bicentennial project . . . supply almost immediately. I’ll always have the outline of the wings You better truck on down to the and that cunning little rudder and ele­ hobby shop and load up on bellcranks, va to r. AMYA 36/600 CLASS Slow Combat tanks (T-28A’s), Stunt When I think about it, Bill would pro­ tanks (T-21E’s), wheels, landing gear bably have a tough time explaining my LENGTH 36 in BEAM 9 '/« |n clips, flap horns, Kirn-Kraft needle val­ interest to his buddies. I know what he SAIL AREA 600 SI) In ves, and whatever else you normally use would probably say if you asked him that is a part of the Clary Line. Hope­ why I keep a collection of seeds on the $ 3 8 .9 5 fully, somebody will pick up this line of coffee table in the living room. He accessories and market them under yet would probably say, “ You’ve got me another name. However, for awhile, t h e r e !" VALKYRIE you are just going to have to do with­ What he doesn’t know is that these AMYA 50/800 CLASS out certain items. seeds are all winged seeds and move LENGTH 5 0 In Not being able to get Clary tanks is from place to place by flying. That’s BEAM 11 '/2 In SAIL AREA 8 0 0 sn In $ 7 4 .9 5 going to make it rough, but there is a just my quiet little way of having a truemor going around that Pylon is go­ squadron of things that fly. I’m not Complete kits include molded plastic ing to market a line of new tanks simi­ going to tell this to Bill because I'm hull and components, all rigging, finished lar to those already used in R/C, but afraid I’ll wake up one morning to find sails and semi-fipished wooden parts. sized and shaped to more suitable for them all covered in green Monokote, use in C/L planes. I sure hope so. I am marked with his AM A number, and en­ TAHOE SAIL SYSTEM $27.95 getting tired of soldering tanks up, tered into competition somewhere in VALKYRIE SAIL SYSTEM $35.95 checking for leaks, worrying about leaks O h io . · forming, etc. and, in fact, I have already switched to using Pylon SS-4 clunk V/ČTOR PRODUCTS J e r o b e e ...... Continued from page 55 tanks on my Slow Combat planes. 11715 Adenmoor Ave. Downey, Ca. 90241 Lots more stuff to write about, but The only modification that we found Calif residents add 6* tax DEALERS WELCOME I must have just about used up my por­ necessary was to secure the clunk tank tion of this months MB. (Betweenyou to the chassis with a rubber band. The and Pond, we could fill one issue! wen) nylon strap that is supplied by the man­ R/Cer. If a mishap should occur, re­ See ya next month. · ufacturer allows the tank to flop a- placement parts are available from bet­ round more than we would have liked. ter hobby shops or from one of the M s O n l y ...... Continued from page 10 As the instructions and box label in­ Jerobee Service centers. The front there, you know. Now she’ll realize dicates, the Comando is not for begin­ wheel spindles seem to be the most vul­ why I don’t insist we use the reading ners. Its speed and handling response nerable part, but replacement is an easy lamp with the SE5 U-Control displayed are challenging, even for an experienced snap-in installation.

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 89 by sunlight. The big difference is in the coloring. Each sheet is different, TRIDENT II RACING TRIMARAN FOR R/C with mottled abstract patterns on simu­ lated gold leaf. The variegated gold pat­ FIRST PLACE IN 1974 AND 1975 36-600 ACCR REGATTAS tern is similar to the material used on • STYRENE HULLS AND DECKS »SEWN DACRON SAILS · HARDWARE vans and custom cars in the Southern • 36" L.O.A. · 36" BEAM · 6.5 LBS. DISPLACEMENT »600 50. IN. California area. The trim sheets are • COMPLETE PLANS COMPLETE KIT (LESS W IN C H )...... S100.00 ideal for making custom designs, let­ tering, and numbers on pattern planes, SAIL CONTROL WINCH S50.00 racers, sailplanes, whatever . . . your CUSTOM R/C DESIGN FOR ALL BOAT SIZES im a g in a tio n is th e o n ly lim it. Ron is also introducing two new POWER - 40 IN. LB. types of striping trim tape. Super FAST ---5 SEC. Stripe is similar to products already on V O LT A G E 4.8 - 6V. the market. It is ultra-thin, fuel proof LIGHT ---8 OZ. SMALL -2"x2"x5" and cures onto the surface in sunlight . . . making it almost like a painted FIRST PLACE stripe. Super Stripe is available in six IN '73 S/B ACCR. standard colors; in 1/16, 3/32, 1/8, and '74 36-600 ACCR & '75 50-800 ACCR 1/4 inch widths. Price is approximately 1/3 less than the competition. SHEET EXIT Glider Stripe is a non-fuel proof G U ID ES - striping tape. It is available in the same $.50 EACH colors and widths as Super Stripe, but at significantly less cost. A roll of 1/8 PROBAR DESIGN wide by 36 feet long will sell for $1.49. P.O. BOX 639 ESCONDIDO, CA. 92025 All of the Ron’s Products line will be available from hobby dealers, distribu­ tors, or direct from the J.L. Wittman Competitive racing is facilitated by ideal for getting started in R/C soaring, Co., P.O. Box 2857, Laguna Hills, Cali­ the interchangeable crystal feature of combining light weight, strength, and fornia, 92653. · the radio. The transmitter can be good looks, into an easy-to-fly package. changed to any of the six 27 mhz (in­ The Bunny retails directly from Su­ Remotely .... Continued from page 19 cluding 27.255-blue) frequencies by un­ perior Flying Models, 4027 South 275th plugging the crystal from the face of Place, Auburn, Washington, 98002, for kit. It’s filed under “Gonna build it the transmitter and replacing it with $25.00 post paid. one of these days . . . ” one for another frequency. The re­ * * * SNIFF THAT SILICONE! ceiver crystal interchanges in the same Ron (Easy Rider) Wittman is intro­ Richard A. Frost, Arlington Heights, m an n er. ducing several new items that should Illinois, M RC’s midwest rapid repair The lerobee Comando has proven to be of interest to all types of modelers. station, warns us about the use of sili­ be a reliable, rugged, and fast 1/12 His Number One towhook is designed cone rubber. We found his comments scale racer. It would be a good starting primarily for R/C sailplanes. This ad­ in the Milwaukee Flying Electrons Inc. point for anyone interested in R/C car justable hook is machined from alumi­ newsletter "Flypaper,” edited by Lee racing. For some good racing tips and num channel stock and uses a hardened Sharafinski. modifications, see the August 1974 is­ music wire hook. The hook position is Frost warns that the ordinary, over- sue of M ODEL BUILD ER. The Jerobee adjustable over 1-1/2 inch range. The the counter silicone rubber that model­ Comando, with the Greenwood Cor­ base of the mount assembly is drilled, ers may use, and is possibly used by vette Stingray body and complete radio and a flat aluminum backplate assem­ some radio manufacturers, is the toxic system lists for $159.95. · bly is threaded to accept the 4-40 acetic acid smell of vinegar, and it has mounting bolts that are included. The been known to corrode the wires and C ounter...... Continued from page 9 mounting hardware is truly hardware terminals in battery packs. The effect . . . not just a couple of sheet metal is similar to using acid instead of rosin included. The 580 square inch wing screws. The Number One hook will sell core solder, which is also a super no-no uses an original airfoil to give a broad fo r $1.95. in the world of electronics. speed range, making the Bunny versa­ Frost is not recommending that sili­ tile enough for slope or thermal flying. Ron’s Vara-Gold Trim sheets are cone rubber be avoided. Instead, he Flying weight can be as low as 24 similar to others on the market . . . urges that modelers and manufacturers ounces, or the Bunny can be ballasted they are self-adhesive, fuel proof, and use the “ non-toxic” type, marketed by up to 48 ounces for increased speed and are made of a very thin polyester ma­ the same makers of the toxic material. penetration. The Bunny should be terial that is very resistant to damage Both Dow-Corning and General Electric make the non-toxic type, but it is usually only available through industrial EASY AS 1,2,3! outlets rather than ordinary retail HUSO« 36's f in is h e d FIRST, SECOHD and THIRD at the stores. It is clearly labeled "non-toxic” , AMYA's 1975 eastern d iv is io n a l championship for the and also comes in colors. 36/600 class at Richmond, v ir g in i a , featured in the AUGUST ISSUE OF POPULAR MECHANICS, OUR COMPLETE KIT THOSE BAR-FLI DIE-CUTS includ es f ib e r g l a s s h ull/deck, f in is h e d s a il s , all We mentioned them in “ Workbench” HARDWARE AND RIGGING, REQUIRING 0NLV R/C, SAIL MINCH column of our November ‘75 issue, and AND LEAD SHOT BALLAST. — *125·* »ob AVAILABLE NOW they’ve been going like hotcakes. In case you didn’t see it, these are com­ LEISURE PRODUCTS plete sets of excellent balsa die-but parts for Phil Kraft’s Bar-Fli, a design 6920 BRADDOCK ROAD that was published in the August ‘68 ANNAN OALC, VIRGINIA 13003 issue of M.A.N. We’re selling them,

90 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER along with a set of plans for $6.00 post­ paid, and have about 50 to 60 sets left as of January 10. Interesting side-light. Phil Kraft or­ dered a set! In fact, we just learned that the model is completed, with a tail-dragger configuration and some other minor mods, and is acting as a test-bed for the Kraft .40 R/C engine. Old Bar-Flies never die, they just buzz on forever! ·

The 1975 TUCSON W INTER NATION­ A LS, by Taylor Collins.

Friday, November 28, 3:30 A.M.: I arrive at Tucson International Airport. The rental car agency people (the ones who try harder) tell me that the roof over their car parking area has blown away! I smiled, with not too much en­ thusiasm, and turned to struggle through the gale force winds to find the car. Friday, November 28, 10:00 A.M.: After a far-too-short nap at the motel, 1 drive the forty miles west to Marana Air Park. On the way I see a full size Bonanza on final at a small private air­ port . . . bouncing around the sky like a cork in a washing machine! Obviously this is going to be a great day for a con­ test. The guard at Marana Air Park tells me that all flying is cancelled for the day. The contest will start at 8:00 A.M. on Saturday . . . Back to the motel to ponder on the problem of ‘what does one do on the day after Thanksgiving in Tucson, Arizona?’ Several fliers had stayed in the area from the United States, Mexico, and Saturday, November 29, 8:00 A.M.: for a week after the Tournament of Italy. And even a distraction like hav­ The wind has subsided . . . from 40 Champions meet in Las Vegas and flew ing a full size P-51 land right in front knot gusts down to a more reasonable in the Winter Nats. Wolfgang Matt, the of the judges didn’t seem to bother him! 15 knots. Flying indeed has started ... current World Champion pattern flier Benito Bertolani, accompanied by despite near freezing temperatures. sent his plane and radio home to Lich­ his lovely wife, also stayed over from Don’t conclude that the 1975 Winter tenstein, and then decided to fly at Las Vegas to fly in the Winter Nats. Nationals went downhill all the way. Tucson. With a Dirty Birdy, Kraft Sig­ Benito is the Italian pattern champ. The weather got better, the pilots co­ nature Series radio, and a specially We must admit that Benito’s plane is operated tremendously and got most of made transmitter "tray” , all borrowed one of our favorites . . . conventional their flights in, and this large, annual from Phil Kraft, Wolfgang flew in the sheeted wings and fuselage, but covered pattern, scale, and racing contest went D Expert competition ... and WON! with colored tissue and clear doped. He into the history books without a hitch. Clearly, the World Champion title is uses a sinister looking extractor pipe- The fact that the contest was held well deserved by Wolfgang. Even with type muffler on an O.P.S. 60 in his ori­ at all is a tribute to the determination a borrowed plane, a borrowed radio, ginal Kosmo design. of the Tucson Radio Control Club. and miserable weather, he managed to After the Quarter-Midget races on Traditionally, the Winter Nats had been beat an assortment of excellent fliers Sunday, a fly-off was held between the sponsored by RC Modeller. When that magazine withdrew its support nearly everyone assumed that the Winter Na­ tionals were dead. But, through the ef­ forts of Craig Gottschang, the TRCC CARR SAILS president, and a lot of help from the 7607 GRESHAM ST. club members, the Winter Nationals for 1975 became a very successful reality. With great support from the R/C indus­ SPRINGFIELD, VA. 22151 try (including M ODEL BUILD ER), the STANDARD CM AH CARP SAILS Fin e st Amerlcan-made DACRON s a ilc lo t h . Tucson R/C Club raised nearly $11,000 V in y l, press-on numerals and In s ig n ia . in cash, trophies, and merchandise Heat sealed edges eliminate fraying. Coated,stainless steel Ubstay Installed. prizes. Rolled-edqe grommets In ta ck ,c le w 4 head. Bolt-rope m ains*1 lu ff mast attachm ent. The winner of each category re­ ceived a large silver bowl and check for Santa Barbara - - »30.00 10-Rater - - - »30.00 East Coast 12-Meter - » 30.00 50/ 8OO(M-class) - » 30.00 $300. Cash prizes and bowls were 36/600 - »25.00 internal. A-class- »35.00 west Coast 12-Meter - *30.00 S ta r US - *30 .0 0 awarded through fifth place in each of Vanguard "J"-boat - - IJjO.OO T&A Petrel - - *30.00 the six categories, for a total of $3,750 Scale vessels, special purpose boats, one-of-a-klnds: Write for a quote, and fo r our 1975 Brochure and Used S a ils l i s t . in cash and over $2,000 in trophies.

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 91 ------The most interesting sight in the M I N U = GLUE TIPS TEE ^ BAR races was that of 10 year old Billy ANY TUBE S< ALUMINUM EXTRUSION Hemple steering his Bearcat around the AN ^ SANDING BLOCK course at very competitive speeds. , lo*u»wiU. RUFF STUFF yo» "MliAiiuniindptfHi' Billy's dad, Bill Sr., does the calling, · y v l • . t-oaSui»*· and "flies’’ young Bill control-line style. -S X __ · Woo1! W«·» Out. 11 incFi - S1.69 · r mdiiA '· 9 9 C • Manny to Om 22 intfi $2.89 Billy also flew in B Pattern. Miraculously, the QM speedster that

RUFF STUFF M I N I a SANDER had a radio failure and whistled through the middle of the crowd at waist level ^ ^ "SELF ADHESIVE SHEET ADJUSTABLE TENSION f H i SANDPAPER” missed everyone and everything . . . “ «11 make your own special firmly holds paper except a VW Micro-Bus parked at the SANDING SHAPES FOR EASIER SANDING · rtilliwtuh · F*«*j*

92 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. Ace R/C Inc...... 95 Commercial: Rate is 40 cents per word with a minimum of $5.00 worth. No Airtronics...... 2nd Cover mail-order discount house ads knowingly accepted. American Balsa Corp...... 79 All ads are payable in advance and may be for any consecutive insertion period Astro Flight Inc...... 86 specified. Name and address free. Send ad and payment to. The M O D EL B U IL D E R . Applied Design Corp...... 92 Classified Ads, 1105 Spurgeon, Box 4336, Santa Ana, California 92702 Cannon Electronics...... 65 Carr S a ils...... 91 P R O F IL E S by Plecan. Two big 24" x 36" FOR SALE . . LOTS OF NOSTALGIA!! Cloudbuster Venture ...... 76 charts of famous Free Flight designs of the Old model airplane kits, catalogs, magazines, C o v e rite ...... 68,75 1934/1963 era. 77 authentic profiles, plus books, plans, motors, etc., from 1912 to Custom Craft Products...... 68 data (span, length, engine size, etc.) . . now 1970. Send 50d and S.A.S.E. for large list. Jim Crocket Replicas ...... 76 only $3.00 for FO LD ED charts. Calif, resi­ Stephen Maciag, 530 Allentown Road, Du-Bro Products Inc...... 79 dents add 6% tax. Paul Plecan, Box 1556, Parsippany, N.J. 07054. E.K. Products ...... 69 Dept. MB, Garden Grove, Calif. 92642. S P E C IA L C LU B O F F E R . . On 3 or more Flyline Models ...... 69 set sent to one address, 25% discount. M O D EL B U IL D E R Mag. collection for sale: Fox Manufacturing...... 78 Volume 1, Number 1, thru Volume 5, Num­ Gas Model Products...... 74 ber 43 (Aug. ‘75) complete. Best offer over W AN TED — Will buy multi-cylinder model Carl Goldberg Models ...... 1 $150.00. Also Champion VG-2 pure platin­ airplane engines. In particular, the older Golden Age Reproductions ...... 67 um element glow plugs in original boxes, spark ignition and certain glow ignition. All H RE Inc...... 88 standard 1/4-32 threads, $2.50 each, mini­ letters answered. Russel Sprague, 8800 mum order, $5.00. Fitzpatrick, 4 East 28 St. Je f’s Friends . . . ‘...... 82 Green Lane, Randallstown, Md. 21133. Suite 1033, New York City, N.Y. 10016. Jo-Mac Products...... 78 JP Models ...... 77 E X T E N S IV E CO LLECTIO N , magazines and K8iB Mfg...... 62 vintage plans. Lists $1.00. Guerrieri, 107 SC A LE PLA N S . . 2" P6E, three sheets 30 x Kraft Systems ...... 2, 3 Alameda, Redwood City, Calif. 94062. 72, blackline, $13.50. 1-1/4" control line Leisure Electronics...... 75 Vought SBU-1,2 sheets, $8.50. Smith Plans, Leisure Products...... 90 W AN TED . . KenHi Buzzer'd kit and/or Box 8, Snowmass, Colo. 81654. Model Builder Binders ...... 84 plans of early 1950's R/C model. State Model Builder/Pana-Vise Contest .... 4 price first letter. Bill Brenchley, 115 Pine Street, Ben Lomond, Calif. 95005. Model Builder Products...... 3rd Cover OLD TIMER MODELS: Beautifully built Micro Models ...... 64 and covered with transparent Monokote. Model Racing Products...... 76 Each model is custom built by Dale Myers. FLA SH ! ..8x10 black and white photo Will sell or trade for ignition engines. Box Model Rectifier Corp. (MRC) . . 4th Cover of Jimmy Allen dressed in flying suit and 66, Stewartstown, PA. 17363. Walt Mooney Peanuts ...... 92 standing in front of biplane. $3.75 each. Sid Morgan (Vintage Plans) ...... 92 George S. Talas, 3835 Covington Road, M8.S Ltd...... 70 South Euclid, Ohio 44121. EXHIBITION MODEL PLANS: Northrop Nelson Model Products...... 83 T-38A Jet Trainer used by Airforce Thun- N.M.P.R.A...... 63 derbirds. Called "Little Tiger" in Vietnam. Octura Models ...... 80 "SAILPLANE DESIGNERS HANDBOOK." A real knockout. $4.00. 26" long, 15" wing­ Easy, complete instructions. S5.96. Eric span. R. L. Stearns, 514 Holden St., Raleigh, Pana-Vise...... 66 Lister, 953 Klockner, Trenton, N.J. 08619. North Carolina 27604. Peck-Polymers ...... 81 John Pond O.T. Plan Service ...... 66 FORSALE: MODERNISTIC MODELS Pro Bar Designs...... 90 The late Hal Swanson's plan service: 5000 PEANUTS! PEANUTS! PEANUTS! New Proctor Enterprises...... 85 plans, $750 worth of new blue-line prints, Peanut plans and other rubber powered scale R/N M o d e ls ...... 87 and sport plans. S.A.S.E. to A ER O ER A , 300 steady customers, two large storage Rocket City Specialties...... 77 cabinets, etc. Bids start at $1000. Phone 11333 N. Lakeshore Dr., Mequon, Wi 53092 Satellite C ity ...... 65 (213) 766-5868. Scott Research ...... 70 Semco Model Engineering...... 67 which handles its own distribution. And Sig Mfg. Co...... 96 Workbench ... .Continued from page 6 from the very beginning, when, without Special Edition Plans ...... 64 time if the material will be all that any financial backing, we could not af­ Jack Stafford Models ...... 84 their best calculations predict that it ford the luxury, we have never had the Sterling M o d e ls ...... 72,73 Sullivan Products ...... 85 w ill be. services of news agency distribution. Superior Aircraft Materials...... 87 Dave . . . all we can think of is this Instead, we have built our own dealer Su-Pr-Line Products...... 81 . . . if it turns out to be better than and subscription list, and in a large part, Swank Products Co...... 80 balsa, forget the ship-building compan­ we owe our expansion to the many Tern Aero ...... 64 ies and their ocean-going tankers . . . modelers who have picked up the ban­ Top Flite Models ...... 71 they didn’t think about us when they ner in our behalf and obtained dealer Tyro Model & Supply ...... 82 took the major portion of the world's orders for us. VL Products...... 74 balsa! However, there are many stones (hob­ Victor Model Products...... 89 G O G E T U M ! by shops?) still unturned . . . so, in an Vintage Aero ...... 85 No matter how long we’re in this effort to avoid any further shocks to our Vortex Model Engineering...... 91 Peter Westburg ...... 82 business (and after 4-1/2 years, it looks tender feelings, we’re going to entice Wilhold Glues Inc...... 87 as tho u g h w e ’re stu ck w ith it), w e ’ll your assistance in locating all of the Williams Bros...... 89 never get over being put down a little poor, unfortunate hobby shops that W RAM Show 1976 ...... 88 when we discover another hobby shop don’t carry MB! Such a deal you World War II Scramble...... 61 owner who has never heard of M ODEL should not pass up! Richard Zasadney ...... 64 BU ILD ER. The put-down is even more As soon as you have read this . . . potent when the “ uninformed” shop pry yourself away, if you can . . . save mation as soon as possible. Upon re­ turns out to be right smack in the mid­ the rest until later . . . put on your ceipt of your information, we will con­ dle of an area that is densely populated private-eye ensemble, and find a hobby tact the hobby dealer and give him our with active modelers! shop in your area that doesn’t carry sales pitch. Of course, we are the only nationally MODEL BUILDER. Get the complete Now . . . IF the dealer places a stand­ and internationally circulated, privately name and address, and, if possible, the ing order with us, and IF your informa­ owned model publication in the U.S. name of the owner. Send us the infor- tion was mailed with the earliest date,

FEBRUARY 1976 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 93 STICK 'EM PATTERNS FULL-SIZE PLANS No. 11752 "T W IR P " $0.75 SERVICE Complete sets of pressure sensitive patterns Beginner's fuselage rubber powered ship. provide "printed wood". . . on your stock . . Teaches stick 'η' tissue. By Dave Gibson. (with instructions) for selected M O D EL B U IL D E R plans. Press all patterns for ribs, bulkheads, tips, etc., on No. 11753 "LU N A R - T IC " $3.00 proper thickness sheet balsa or plywood, Classic-looking, high performance Half-A No. 2761 D R A G O N FL Y $4.00 and cut 'em out! No tracing, no transferring, free flight. Easy to build. Harry Murphy. R/C funship, looks like giant rubber stick no plans tearing, no inaccuracies. Just like model. Superb trainer. By Tex Newman. making up your own kit with printed wood. No. 1175-0.T. FOO 2-U-2 $2.50 No. 2762 " K IL L E R " SA U C ER S1.50 A pre-Zipper design by Dick Obarski, re­ "Stick ’em Pattern" numbers correspond to For C/L combat, or just attracting atten­ duced to .020 Replica, by Ron Sharpton. plan numbers. Order with plans and they'll tion. 22" diameter. By Howard Evanson. be mailed together . . 3rd Class. Add 50/ No. 10751 THE L IT T L E ONE $4.00 per set to mail patterns 1st Class. Economy size, .40 powered pattern ship No. 2763 A M ER IC A N "E A G L E T " S3.50 CALIFORNIA RESIDENTS ADD 6% TAX. F/F scale 1930 lightplane, for rubber or has rolled ply fuselage. By Dick Sarpolus. electric power, 48" span. By Tom Laurie. No. 775-O.T.SP B O M B S H E LL $3.25 No. 10752 M IST ER M U LL IG A N $4.50 No. 575-O.T.SP M ER C U R Y $3.25 Jumbo scale rubber model of famous Ben No. 276-0.T. "LO N G C A B IN " $3.50 No. 11743 SP "C - Q U ELL" $3.95 Howard racer, spans 56". Tom Houle. Good looking, stable cabin gas model of No. 1174-O.T. SP LAN ZO ST IC K $1.95 No. 91074 O.T.SP B U H L PUP $4.95 the 1937 era. Span 78” . Phil Bernhardt. No. 10753 SU PER PUP $2.50 No. 8741SP W OODY PU SH ER $1.95 Profile C/L stunt ship for .29 to .36 pow­ No. 874 O.T.SP PO W ER H O U SE $3.95 er, 42" span. Easy-built. Mike Parenteau. No. 7741SP C U R T IS S A/12 S H R IK E $3.95 No. 1761 PA T T ER N S P IT F IR E $4.00 No. 1075 O.T. S K Y L A R K S3.50 No. 774-O.T.SP OUT 0 SIG H T $2.45 Scale-like .61 powered pattern ship flown Pleasing Class A/B Louis Garami design. No. 6741SP T R IX T E R BEA M $2.95 at 1975 World Champs. By Tore Paulsen. Shoulder wing, 50" span. Phil Bernhardt. No. 674-O.T.SP R ED Z E P H Y R $3.95 No. 12711SP C URTISS-W RIG H T Jr, $3.95 No. 1762 T EX A N 750 $4.50 No. 574 O.T.SP T O CO UPE $2.95 Popular Class B-C free flight, modified for No. 9751 B A B Y A LB A T R O S S S8.00 No. 11731SP B IG JO H N the F IR S T $5.95 today's engines/rules. Jim Scarborough. Exact R/C scale model of famous Bowlus sailplane. Span 122". Col. Bob Thacker. Watch this space for more patterns to come. No. 176-O.T. K O R D A W A K E F IE L D $2.00 No. 9752 F IR E D R A K E $3.00 The classic of all rubber powered comp­ Half-A free flight featuring fast climb, etition free flights. By Phil Bernhardt. flat glide, penetration. Larry Sicuranza. No. 7751 L IT T L E BOM B $2.50 Minimum area 1/2A pylon racer for two No. 12751 C L IP P ER A M ER IC A N U S $4.00 No. 975-O.T. P U R S U IT E E R $4.00 channel radio. By Wm. R. Nielsen, Jr. Composite scale R/C model of modern jet Smart looking 1938 Pete Bowers design. airliner. Span 48", .09 eng. By Art Hall. Span 60", area 575. By Phil Bernhardt. No. 7752 T H E A L IE N $2.50 Pendulum controlled flying wing pusher No. 12752 FOUND $1.50 No. 8751 SOPWITH T A BLO ID $4.00 for Brown CO2 power. Daniel Walton. Scale rubber powered seaplane of Canad­ Sport Scale WW I biplane for 3-channel ian design. Span 26". By Walt Mooney. radio. Span 42", .19 eng. By Chris Moes. Price includes 3rd Class postage and reprint No. 12753 S O L ID IF L IE R $2.00 No. 8752 V O L K S PL A N E $1.50 of building instructions (if any). Add 45

94 MODEL BUILDER ' pulse commander

New antenna mount.

Due to its small size, light weight, si city, and low cost, pulse proportional der-only flying is an ideal way for one vinyl clad aluminum case. budget who wants to get into R/C or sport flyer who needs a second system fun flying. Quality stick assembly.

The sensibility of small, rudder control airplanes continues to increase as the n to economize becomes more and more portant. Don’t let an economic pinch p >nt you from enjoying your favorite hob

Units are wired, tested, and guarantee Complete with airborne nicads and charge Trim furjition

Switch guard to prevent accidental turn-on.

BABY $69.95 nods) : / - - · * ••f-ATirørfie w§i.ght = 2.35 oz. / ' ' ' ‘ ‘ Recommended for .010 and Pee Wfte .020 - planes no.t greater than 3 6 ".span. BABY TWIN $72.95 (iog i5T) Í —Airborne weight = 2.55 oz. .* - For Pee Wee .020, Tee Dee .020. anlTslow. r. Λ * * * flying Bapfs Bee .049 planes up^to 4 0 " Span. STANDARD $71.95 nocie) • - ·■.·—Airborne’vÆe'ight'?^ 02. » " ;r . r-Ftor Babe Bee.anø stpv» flying Tee Dee .049 ships u p jQ 4 2 " span. 5Ť0MPER $74.95 Mocí?) 'A V A ÍL A 8 L E .O Pii.2 6 .0 9 ^ 27J B S f 2 X 0 9 5 ;·27:Τ45, 27.TÖ5 mHz " -Airborne weigh» -4. l oz.. . ■ - ·. . . ~ Λ ” Ϊ - * . · - · t-PřCamreérfded for bol -.049 to slow ' flying .15 ρρννεΤβι! ships. ; ...... '

Please send me your complete catalog. Enclosed is $1.00 which is refunded on my first order. (Add $ .50 for 1st class mail return) ACE R/C, Inc. Name Address BOX 511 D HIGGINSVILLE, MO. 64037 City Stale

FEBRUARY 1976 95 IDEAL FOR SPORT FLYING FUN OR THE NEW AMA BIPLANE STUNT EVENT

Full-Length Formed Plastic Designed by CLAUDE McCULLOUGH Fuselage Top KIT NO. RC-34 WING SPAN: 51” Molded Plastic Cowling And L E N G T H : 4 2 - 1 / 2 ” Wheel Pants * WING AREA: 790 Sq. In. Molded Cockpit Trim Parts 52.95 ENGINES: .45 - .60 Strong Pre-Bent Aluminum Seldom has a home built design caught on so quickly as LaMar Steen's beautiful Landing Gear aerobatic biplane. Many Skybolts have been completed and flown and hundreds of Formed Wire Cabane Struts others are under construction. LaMar was a RC flier for many years before becoming Die-Cut Balsa Ribs With interested in full-size construction and his model building experience shows in the Integral Jigs - Helps way the airplane looks and flies. Assure True Alignment Sig’s model version of Steen’s Skybolt was specially tailored by Claude McCullough Die-Cut Plywood Parts for the new RC Biplane Stunt pattern event. A full symmetrical wing section de­ Handy Printed Fuselage Sides livers outside and inverted maneuvers. Control reactions are quick and responsive. Build Directly on the Wood Difficult free-style gyrations and the full slate of FAI and AMA pattern stunts are Sig Quality Balsa and Plywood routine for this model. Unlike many full aerobatic designs, the Skybolt is not touchy Colorful Decals or tricky to fly. The landing gear position gives top notch ground handling. Large Full-Size Plan Illustrated Step-by-Step Booklet With Isometric SIG'S LATEST CATALOG! Construction Views Photos of Full-Size Skybolts "The Modeler’s Wishbook” Nylon Control Horns And Every workshop needs our latest Catalog. The complete Bellcranks line of Sig kits and supplies is shown plus practically Nylon Tail Wheel Bracket all other lines available. For sale at your local hobby Nylon Screws for Bolt-On shop or send $ 1 .5 0 for your postpaid copy. TO ORDER KITS AND SUPPLIES: See Your Dealer First! If he can­ Wing Attachment not supply you, order direct. Add $ 1 .0 0 postage and Molded Plastic Hinges handling in the U.S., $ 1 .5 0 in Canada. Minimum order Tuf-Steel R-C Links is $1.00. DO NOT send cash, send check, draft or money Aluminum Motor Mounts order. No C.O.D. Prices subject to change without no­ Blind Nuts, Screws and Other tice. Double check to be sure you have included your Small Hardware C A T A L O G 34 name, address and zip code. Sig Manufacturing Co., Inc. Montezuma, Iowa 50171

96 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER IN THE BEST CIRCLES, IT’S f i b e r s k iv e r

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

Safe, Rear Draw-Bar Clutch Available in seven anodized handle colors: Precision, Instrument-Quality Materials silver, blue, red, green, gold, copper, violet. 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 S12.95 Individual handles (specify color) S5.10 Long-Life, Stainless, Vial of 6 blades (No. 10, 11, 12, 15. Surgical Steel Blades or 20) S2.10 20

See your dealer, or order direct. Dealer inquiries are invited. PRODUCTS All direct orders sent postpaid in U.S. MODEL BUILDER California residents add 6% sales tax. 1105 Spurgeon, Box 4336, Santa Ana, California 92702 •ΛΕ the A out of ARF! MODEL RECTIFIER CORPORATION . 2500 WOODBRIDGE AVENUE . EDISON. NEW JERSEY 08817

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