ffeeognlgedtfotQim M p f HE WORLD OVER Christen Eagle II A -3 6 Beech 1/3 scale

F-86 Sabre Jet Avail. In 0 & H models (ducted fan) 1/8 scale

T-34B Mentor General information about F 16 (ducted fan) 1/6 scale these now r product re 1/8 scale l ^ k leases fofound in catalog

Kfir 1/7 scale MiG-15 (ducted fan) 1/6 scale MiG-15 (ducted fan) 116 scale

Byro-Jet ducted fan F-33A BeeclicraTt (for .6 0 engines) 116 scale

Pitts Special 1/3 scale MODEL AIRCRAFT HAVE NEVER BEEN BUILT LIKE THIS BEFORE! Scale Realism. Pulse-Quickening Performance. State-of-the-art technology. Unsurpassed Quality. These are but a few of the many reasons why modelers the world over look to Byron Originals for model aviation's best buys. It's a unique product line of superior technology, conceived and perfected by more than twenty- T 34C Mentor five years of manufacturing experience seasoned with a 116 scale Beech Baron 58 116 scale sincere concern for quality. At a time when others are com­ promising on design, realism and quality in order to cut costs, Byron Originals continues to strengthen its reputation by consistently offering more product for your money. Reach for realism. It's a modeling experience you can’t afford to pass up. For complete product line information, send $5.00 for our new omprehensive cátalog. It's full of color and B/W photos, rawings, product reviews and all the pertinent technical in­ Mirage (ducted fan) formation you need. Catalog price will be credited towards 1/7 scale l your initial purchase.

YOUR (Refunded with initial ORDER purchase)

CATALOG VISA

Byron Originals. P .0. Box 2 7 9 . Ida Grove. Iowa 5 1 4 4 5 , NOW! Ph: 7 1 2 -3 6 4 -3 1 6 5 ■ p THE 1X50 FLIGHT SYSTEM: POWER TO SOAR TO NEW HEIGHTS.

against the commutator in precision The Miracle of Electric Flight brush tubes to eliminate power loss We made practical, clean and and allow accurate timing. economical electric flight a reality. Ένο LT50 armatures And, contrary to popular belief, are available; o we accomplished it over ten years ago. torque Pattern Leisure Flight Systems have pro­ for direct drive vided reliable electric power for all ^ 9 applications kinds of intriguing model aircraft, from and the agile pattern planes to Modular construction makes the new Lei­ converted Old Timers. sure LT50 a better m otor. . . easier to maintain, modify or re-magnetize. Other Best of all, Leisure outstanding features include machined Systems have the power case and end bells, precision brush and performance to make tubes, shunted brushes, sealed ball bearings and adjustable timing. ■ 'jÅ electric flying both challenging and exciting.

high-speed Competition wind for gear drives. The Leisure Playboy is an extremely stable sailplane, a perfect kit for beginners and contest flyers Complete systems for alike. Scaled from the winning free flight both versions also include original of the 40's, our 6 7 V span Playboy is already 3for-3 in Old wired 6-cell NiCad batteries Timer competition. (7.2v/1200mAH), switch harness and prop adapter.

The Great Glide Oft % The Leisure LT50 also makes the perfect launch system for all kinds of radio controlled sailplanes. In fact, soaring couldn’t be any simpler than with reliable, convenient electric power. That should explain the over­ whelming popularity of Leisure Flight Systems for both direct and gear drive Leisure 109 Digital Charger. Gets the most from sailplanes at the 1982 Grand Cham­ every charge with ±1% accuracy. pionships. With limited sites and rising fuel Another favorite of the event was costs, the electric RC pattern class our newly-kitted Playboy Old Timer. could well be the wave of the future.

With Leisures Gear Drive conversion (3:1) Leisure’s LT50. 2nd Generation the powerful LT50 develops up to 2 lbs. Electric Powerhouse. * of static thrust. Gear Drive also features ball bearings. Delrin/brass gearing and glass loaded polycarbonate housing. One big reason for the phe- nomenal performance of the Lei- ^ ™ sure System is our exclusive Finalists at Leisure's First Annual Grand Stunning Pattern Performance. Championships show off their sailplanes. LT50 ball-bearing motor. A good demonstration of our Superbly engineered, the modular Discover exciting electric flight potent new LT50 Flight System is LT50 features removable light alloy for yourself. Send a self-addressed, the performance of our prototype end and brush caps for easy mainte­ stamped envelope for our latest cata­ “Shoestring.” nance. Machined to precise tolerances, log and technical bulletins. A tøA-sized, 34 oz. pattern plane, both caps are anodized black and air- the "Shoestring” flies for up to 10 min­ vented for optimal heat dissipation. utes on a single charge and can easily Inside, the LT50 puts coil Leisure complete the AM A class A routine. spring-loaded, shunted brushes up 11 Deerspring/Irvine/Califomia 92714

COURTESY TO SENIOR CITIZENS MAY

MODEL S’ 1983

BUILDER volume 13, number 136 621 West Nineteenth St., Box10335, Costa Mesa, CA 92627 0132 Phone: (714) 645-8830

STAFF CONTENTS EDITOR/PUB USHER Wm. C Northrop, Jr. FEATURES GENERAL MANAGER Anita Northrop W O R K B E N C H , Bill Northrop...... 6 ASSISTANT GENERAL MANAGER OVER THE COUNTER ...... 7 Dawn Holcomb FUEL LINES, )oe Klause...... 11 DRAWINGS BY R /C W O R L D , Bill Northrop ...... 12 Al Patterson H O W T O FLY PATTER N, Dick Hanson...... 16 OFFICE STAFF Edie Downs R /C S O A R IN G , Bill Forrey...... 20 A Valcarsel ELECTRONICS CORNER, Floy Mare*...... 23 Mike Whitney ELECTRIC P O W E R , Mitch Poling...... 26 SUBSCRIPTIONS Jo Anne Glenn BIG BIRDS, Al Alman...... 32 C H O PPER C H A T T E R , Ray Hostetler...... 34 CONTRIBUTING EDITORS “ 1 TO 1 R/C SCALE, Bob Underwood...... 36 Al Alman Eloy Marez R /C B O ATS, Jerry Dunlap ...... 40 Jerry Dunlap Walt Mooney Bill Forrey Mitch Poling PLUG SPARKS, John Pond ...... 41 Bill Hannan John Pond EXPAN D ED SCALE V O LT M E T E R , Mitch Poling ...... 46 Dick Hanson Fernando Ramos R/C AU TO NEWS, Dan Rutherford...... 48 Ray Hostetler Dan Rutherford Ken Johnson Bob Stálic k B O R N A G A IN FREE F LIG H T , William Langenberg...... 49 Joe Klause Bob Underwood H A N N A N 'S H A N G A R , Bill Hannan...... 54 F/F SCALE, Fernando Ramos...... 58 ADVERTISING FREE F LIG H T, Bobstalick...... 60 REPRESENTATIVES Bill Northrop Home Office, Costa Mesa Al Novotnik SCALE VIEWS 4 Beverly PI., Norwalk, CT 06850 Bus. Phone (203) 847-7478 TRAVEL AIR 2000, Peter W estb u rg ...... 38

MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC.. 621 West 19th St.. Box 10335. Costa Mesa. CONSTRUCTION California 92627-0132. Phone (714) 645-8830.

PLEASER, Stan W ils o n ...... 17 Subscriptions: $25.00 per year. $47.00 for two years. Single copies $2.50. Subscriptions R /C CLIPPER, Stu Richmond ...... 28 outside the US (except APO & FPO) $32.00 SHRIMPO S-3, M itch Poling...... 44 for one year only. All payments must be in US funds, drawn on a US bank. PEABODY PACKET, Walt M o o n e y ...... 51 Copyright 1983 by RCMB INC. All rights PEANUT ZLIN, Stephen H a le s ...... 55 reserved. Reproduction without permis­ sion prohibited.

Change ol address notices must be received six weeks before date ol issue that new Cover: Can anyone offer a more scenic spot for slope soaring than this? It's Grouse address takes effect. Send old address with Ridge Lookout, altitude 7707 feet, near Grass Valley, in northern California. The gentle­ new; old label preferred. Post Office will man launching his stock "Gentle Lady" is TWA pilot Eli Whitney . . . honest. . . Photo not forward copies unless you pav extra taken last summer, on Kodak color print film, by Tony Palethorpe. Oh yes. . . there is a large, grassy landing spot well out of the turbulence, behind the ranger station just visible postage. Duplicate issues cannot be sent at the left. Second class postage paid at Costa Mesa. California, and additional offices.

2 MODEL BUILDER

SIG KITS AROUND THE WORLD

Above: Ed Wisser (McKeesport, PA) added a lot of scale detailing to his beautiful 1/4-Scale J-3 Cub, including inspection panels, rivets, control pulley's and a full cockpit with upholstered seats and seat belts. Ed said, "You did an excellent job in designing this airplane to 1/4-scale kit form. Your plan drawing's are good and very accurate. The building instruc­ tions are also good and easy to follow. As with all Sig kits, this J-3 could be built by a beginner. There is nothing I can add to your instructions, you covered it all." He used Sig Koverall covering and installed a Kioritz Jr. 1.3 cu. in. gas engine. Ed expects to display this fine piece of craftsmanship at Toledo. SEE YOUR FRIENDLY SIG DEALER FOR ONE OF THESE FLIGHT-PROVEN DESIGNS KADET MARK II SUPER CHIPMUNK KIT RC 4 9 ...... $55.95 KIT KBRC-1...... $87.50 WING SPAN: 571/4" WING SPAN: 64" ENGINES: 25 - .40 ENGINE: .61 1/4-SCALE PIPER J-3 KOUGAR Anthony Cantarella of the Simi Valley (CA) Fliers did this Kadet MKII con­ KITRC-48 ...... $174 95 KIT RC-35...... $59.95 version to a low wing. He changed the dihedral to 1" under each tip, WING SPAN: 105" WINGSPAN: 51" recessed the wing into the fuselage 1/4" from the bottom and mounted ENGINES: .60 or l 5 Glow or Gas ENGINES: .40 · 50 the engine at a 45° angle. “The plane flies beautifully."

J. Holdsworth (Liverpool, England) wrote, “ I am a member of the Liver­ pool and District Model Aircraft Society and the Super Chipmunk always attracts a lot of attention from members and spectators at the club flying Butch Ranger and Dick Krueger (Watertown, Wl) built these two sharp field. During the plane's life it has been put through practically all looking Como .51 powered Kougars. Dick said, "Both fly super great. We aerobatic maneuvers and has handled beautifully. It is a model that can just can't say enough about the flight performance of these planes!" be truly recommended for performance, stability and looks.

See your dealer first! For direct orders, call toll free 1-800-247-5008. For mail orders, add $1.50 postage under $10.00. Over $10.00 postpaid. No C.O.D. Catalog 45 - $2.00. SIG MANUFACTURING CO., INC...... Montezuma, IA 50171 siGsr BUY FROM AUTHORIZED SIG DEALERS ^ sig

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Inc WATERLOO ROCHESTER DEPEW Carpenter Hobbes BEAVER DAM Anchorage House of Hobbes 1928 Del Prado Bhrd Les s Bicycle 4 Hobby Trackside Hobbes Oepew Hobby Center R D 3 Box 111 Park Electron«c» Hobby Hut 604 C Street 272 1043 JACKSONVILLE 900 LaPonte Rd 418 Mam Street 5866 Transit Road MILTON 713 Park Ave 4211 SpenerdRd 243 2643 Field s Hobby Shop, Inc KANSAS SAGINAW PH 684 5555 Kreb s Newstand GALESVILLE 3521 Mt View Dr 272 5651 602 S Edgewood Ave KANSAS CITY Tart * Hobby Shop #2 ELMSFORD 83 Broadway R C Unlimited ANCHORAGE LEESBURG R C H 08 B 1 E S C 326 Fashion Square Malt PITTSBURGH 825 Park D iv e Hobbycreft Inc. Top Vakre Hobby 5620 SUte Ave SAUIT STE MARIE Andy's Hobby Shop 36 Mam $tre«i ΒΊΙ 4 Watt s Hobby Shop PH 60 8 5 8 2 2 8 5 3 800 East Ormond Btvd 2740 North Hwy 44 12 7 LIBERAL Pinnacle Hobby Shop Fruit land Partk Ptara Miller s B4>e 4 Hobby Shop 129 E Portage Ave KINGSTON 116 Smrthfwtd St MARSHFIELD Suite 136 M « Wisconsin Hobby Center ARIZONA MELBOURNE 105 E Seventh TRAVERSE CITY J 4 J's Mobbes Inc READING 785 Broadway Iron Horse Hobby House Northway Mall GLENDALE E rne 's Hobby Shop SAUNA Ray's Rad «C o n tro l Shop 60 South 6 lh St F A F Hobb«e*. Inc 631 Apollo Blvd Mr Hobby 517 So Union R IO «MOND HILL 503 E Ives St W.lson Hobby MENOMONIE 7424 N 51st Ave MIAMI M*J State Mall PM 6189474949 READING 10 44 0 Jamaica Ave PHOENIX. Crown Hobbies PH 827 3032 UTICA Ott's Hobbes True Value Hardware ROCHESTER 536 N 10th St 1512 9th Street Exeter Hobbtes 7439 Coral Way TOPEKA Henderson » Hobbes Dan's Crafts 4 Things SIATINGTON L Mart Shopping C tr 3285 E McDowell Rd MIAMI Capita« R C Hobbes 2441 Auburn 24 Burstn Street MILWAUKEE PHOENIX Orange Blossom Hobbies. Inc 5839 W 21st WARREN Valley Hobbes 4 CoAectibes 102 Mam Street Casanova s Hobby The Hobby 8ench 1975 N W 36th Street WICHITA Prop Shop Hobbes SYRACUSE Wart s Hobby 4 D a ft WARMINSTER 19ih Avenue 6 Northern PENSACOLA Modeler Hobby Shop 23044 Van Dyke 1423 S Mirtkego Ave PHOENIX 947 Park Lane Shppmg Ctr 1 Block N ot 9 Mile 4300 W Genesee St J C RC Hobbes PH 414-672-2700 UTICA Hobby Bench 3319 B KENTUCKY WYANOOLLE 13 York Road CANADA American Hobby 4 Sports PM 2 1 56 72 5200 B A A IF ALBERTA Paradise Valley Mad PLANTATION BOWLING GREEN Stoner Hobby Center 2107 Whitesboro Street 4550 E Cactus Rd Universel Hobbes Pete's Hobby Shop 145 Maple St WAYNE B A 3 Transport Ltd. PH 315 724 4959 PHOENIX 141 South State Road 7 1224 India nota Ave PH AV 32355 Hyatt Hobby House Box 6 NORTH CAROLINA Gateway Shopping Center Arizona Hobby Craft Inc POMPANO BEACH LEXINGTON MINNESOTA PH 373-3953 CHARLOTTE PM 21 5687 2244 CALGARY ALBERTA 401 E Welkins Trade N Hobbies XCell Models. Inc BEMIDJI SOUTH CAROLINA SEDONA 2 1 5 9 $ E 9th St 347 Eastland Shoop-ng Ctr Hobby Hutch Science Hobbes. Inc Hobby World Canada 2615 Central Ave My Hobby Shop SARASOTA PM 606 254 2406 Paul Bunyan Mall GREENVILLE Box 368 Stn M Smith's Corner H 4 H Hobby Sales LOUISIANA BLOOMINGTON EDEN The Great Escape CALGARY ALBERTA Coke's Fix M 4 Hobby Shop Pteasantburg Shopping Center P M S Hobby Craft PH 602 282 1290 4121 S Tamiami BATON ROUGUE Jolly's Hobbies 4 Crafts Rt. 2 Bo* 222 1426 Leurens Road Calgary North Hill Centre TUCSON SOUTH OAYTONA Hobby Towne 7935 Southtown Center PM 9196270166 Ph 803-2358320 or 2424229 Tucson Hobby Shop Ace Hobbes 3112 College Drive CRYSTAL WINNIPEG, MANITOBA GREENSBORO MYRTLE BEACH Cellar Dwener Nobby Ltd 43S2 E Γ 2133 So RidgwoodAve MANDEVILLE Crystal Schwinn Cyctery TAMPA Mercury Hobbes. Inc 6324 Bass Lake Road Sports 4 Hobbes Unlimited Ed's Hobby Shop 1354 Mam SI 2144 Lawnda«e D iv e Hwy. 501 - Next to Fanjoy LITTLE ROCK Farmers Sundries 4 Hobbes R1 6 Box 734A ST PAUL PH 5892037 S *n Company Sherr.ll * House ol Hobbes 4939 E Broadway NEW ORLEANS Gulliver's Lawndale Shopping Center WINNIPEG. MANITOBA Gooch s Hobbes 3406 S University Ave PH 81 82 48 33 14 Pet 4 Hobby Center 1526 W Larpenteur HENDERSONVILLE SUMMERVILLE Hall Plaza Shopping Center GEORGIA 4035 Touro Street ST PAUL The Hobby House FWP Hobby Shop 646 Ρο-tage Ave 90B Bacons Bridge Road No 4 PH 562-8230 ALBANY WESTWEGO Mac's Models. Inc 1211 Asheville Hwy. ST JOHN'S NFLD PH 692 6683 TENNESSEE NORTH LITTLE ROCK Lowell's Ctark's Hobby 4 Craft Center 1322 N R

w o r k b e n c h

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• Spearheaded by the quote from Fred KomLosy’s comments in his Palm Beach (Fla.) Aeronauts newsletter, our While "Pug" Henry was having trouble getting a command after Pearl Harbor, your “ Whither Guest Model Airplanes” edi­ editor/publisher was finding it increasingly difficult to indulge in his favorite hobby while participating in the Naval ROTC program at college. Those are the freshman torial in the March Workbench column dorms at Resselaer Polytechnic Institute, and we're holding a just finished Thermic 72. stirred up lots of commentary from readers. If nothing else, the reaction confirmes our belief that no matter what . . . the ‘Boston Glider Chuckers'.” "I think we can keep this thing alive a becomes of the model airplane hobby Thing to do, Bob, is to convince the little longer if we try to emphasize FUN as we’ve known it in recent years, there gals that glider chucking is good fo r.. . rather than setting records. A lot of the will always be a hard core of designers, er . . . upper chest development. guys who flew with us last year came innovators, scratch builders, and experi­ And from Don Ross, Cresskill, NJ . . . along to get into a relaxed contest that enced fliers who will keep the genuine "I read with interest your March 7983 anybody could win. Events like the Time hobby alive for future generations. Workbench article in Model Builder. Target (joe Beshar’s ideas, I think) and We offer two letters of special interest. In general. I guess you are right that the the Mystery Time (the winning time is First, from Bob Buck, Boston, Mass. old time stick-and-tissue, problem solv­ picked from a hat after all the flights are "Was most interested in [your] "W ork­ ing model builder is dying out. How­ over), Toilet Paper Tow and this year’s bench" in March . . . ‘Whither Coest ever, a few of us are making a valiant Fly Ή ’ Run are sure to provide fun Model Airplanes?' I’ve moved to Beacon fight to preserve some of the old time without pressure. We’ve even got a few Hill in Boston . . . the city life (or a bit, to values. RC'ers who want to try rubber so they provide new horizons, etc. However . . . " Last year we held a Pacific Ace One can fly something slow for a change.” finding model building there (and Design Contest at Galeville, New York, According to a flyer that Don attached, associated hobby stores with wood along with the East Coast FF Champs. there will be another One Design con­ models and supplies), or in most any With almost no publicity, we got over 20 test, at Galeville, NY, in conjunction with metropolitan environment, is a mission contestants and we had a world of fun. the 1983 East Coast FF Champs in June. the FBI would be proud of. Our Toilet Paper Tow event and my on- This year’s one design is the “ Black "Course, I am the minority, but the the-field flight of 74 minutes in that Bullet” . Kits for the BB are available from convenience of plastic, Atari, and so event turned our contest into news that Schlueter F/F Models, 3508 Poinsettia many other diversions, certainly seems appeared in several magazines. So far Ave., Manhattan Beach. CA 90266. See to challenge the future of model build­ this year, because o f the few paragraphs our Jan. ’83 “ Over the Counter”, or ing. Guess one way to practice our o f publicity we got last year, we have write for information. hopes of model building's future is to over 45 people eager to enter this year's The new Fly ’N’ Run event works as offer our happiness in hobby to the contest. Most of them are over 45, but follows: You get a 15 minute time youth. we have a few young recruits who will window in which to get all the air time "By the way, I'm curious how down­ help to keep the hobby alive. In my area you can. You must retrieve your model town Boston might handle an active alone (North New jersey), five people and return to the flight line for each model builder chucking HLG’s amongst have called me and gotten active in launch, and flights of under ten seconds the Boston Common. Maybe I’m not modelling again . . . some after a 20-year don’t count. The kids should do well in such a minority . .. we’ll see. Suppose layoff!! One fellow is finishing a Puss this one. You may wind while retrieving jogging or roller skates would allow Moth covered with silk!! That's the first ... if you can! (Flmmm ... maybe they more meetings of the opposite sex, but silk covered rubber scale FF I've seen in maybe we’re just in time for a new fad many years. Continued on page 96 6 MODEL BUILDER OVER THE COUNTER

A ll material published in "Over the Counter" is quoted o r paraphrased from press releases furnished by the manufacturers and/or their advertising agencies, unless otherwise speci­ fied. The review and/or description o f any product b y R/CMB does not constitute an endorsement o f that product, n o r any assur­ ance as to its safety or performance by R/CMB.

• Do pinstripes have you down? Do you hate working with masking tapes? Well, Model Rectifier Corporation (MRC), 2500Woodbridge Ave., Edison, N) 08817, just might have the answer to your pin- striping problems. The answer comes in the form of Tamiya’s new Paint Marker pens. MRC is New "Hornet" Embryo kit from Micro-X. the distributor of these labor saving pens that look like felt-tipped marking pens chisel-shaped and measures four m illi­ 12 assorted colors. Seven of the 12 are (a la Marks-A-Lot, etc.). In use, the meters by one millimeter. This tip is used glossy: black, white, royal blue, green, Tamiya/MRC Paint Markers are actually to break the seal in the main body of the orange, red, and lemon yellow. Two quite different than common marking pen (thus allowing paint to flow) by colors are metallic: chrome silver, and pens. First of all, they are filled with pushing it against a piece of cardboard enamel paint, not ink. Secondly, the four or five times as if to make four or body of the pen is metal, not plastic. five dots or periods. Once the paint Thirdly, and most apparent when one begins to flow, you can use the Paint shakes a Paint Marker, there is a mixing Marker on wood, glass, metal, or plastic ball inside which rattles around like one to paint fine detail or large flowingareas of those aerosol "paint bombs” or spray with ease. There are no brushes to clean cans which we have all used at one time up when you are done, or paint jars to or another. spill in the middle of a project. The felt tip of the Paint Marker is Tamiya/MRC Paint Markers come in MRC*s new Tamiya Paint Markers.

World Engines' new O.S. 25VF DF ABC T and D Fiberglass Specialties' newest fiberglass cowls.

MAY 1983 7 Big Bore 5 radial glow powered engine from Technopower II. Three cylinder, 1.3 cid radial also from Technopower II. gold leaf. The remaining three are matte Block, Garden C ity, M l 48135, (313) stacks; the next cowl is for the T and T finish: black, flesh tone, metallic gray. 421-6358 has announced the availability Models 1/5-size Globe Swift; and finally Also worthy of note is the fact that these of four new fiberglass cowls for your a cow l for the Art Johnson P-43 as Paint Markers are expertly matched to scale and competition modeling con­ featured in the March ’83Model Builder. Tamiya's regular line of acrylic paints. venience. Write to T and D for further informa­ They are identified with the same names In the photo from left to right are: a tion, and send an SASE for a complete and numbers, too; and each Paint 1/4-scale cowl for Wayne Ulery’s Laser price list. Marker contains eight grams of enamel 200 (one-piece wheel pants and canopy ★ ★ ★ paint . . . enough for fifteen 1/24 scale are also available); a cowl for Jim Mes­ Identity Check Printers of Park Ridge, cars. Give ’em a try! ser's Ercoupe, which comes in two Illinois has announced two new addi­ ★ ★ ★ lengths, one as shown on the plans for tions to the World War II Warbird Check T and D Fiberglass Specialties, 30925 mounting a Quadra at a 45 degree angle, assortment. As of right now. you can and the other (1-1/4 inches longer) for have bank checks with backgrounds mounting a Quadra vertically so that showing eight popular WW-II aircraft. nothing sticks out except the exhaust The new, expanded assortment features

P-51 check from Identity Check Printers.

Brufen Products Galaxie III display cases can be ordered in any size.

World Engines Expert Mark 9 transmitter. Sailplane beefed-up with cured carbon fiber composites from Twin-K.

8 MODEL BUILDER WW-I style Standoff Scale bipe from Balsa USA. Nerf bars, rear cage, and wing for Bolink Digger 10. the P-51 Mustang, the w orld’s fastest and announced the availability of its newest World Engines, 8960 Rossash Ave., most popular single engine fighter plane kit, the “ Hornet” Embryo. It is a rubber- Cincinnati, OH 45236, (513) 793-5900, and popular R/C model; plus the F4U powered contest model for beginners proudly announces the availability of its Corsair of "Baa Baa Black Sheep" fame, and experts alike. With its 18-inch newest powerplant for ducted fan the P-38 Lightning, the B-29 Superfor­ projected wingspan, half-ounce weight, models, the O.S. 25VF DF ABC. tress, Avenger, Wildcat, AT-6. and B-25. and stick-and-tissue construction, the The new O.S. 25VF DF ABC is a power­ Identity Check Printers also produces model has been designed for maximum ful entry into the .20 size ducted fan check assortments for Piper, Cessna, and performance with the least amount of area. This front induction/rear exhaust Beechcraft buffs. For those hooked on construction effort. engine is housed in a crankcase that is nostalgia, a Golden Age of Aviation Included in the Hornet kit are full-size the same size as most of the 3.5 engines assortment which includes the Beech illustrated plans with building and flying currently used, yet its added displace­ Staggerwing, Curtis jenny, and |-3 Cub, instructions, quality printwood, 18-inch ment and higher exhaust timing pack is available. stripwood, colored japanese tissue, considerably more punch than any Aircraft Modelers can order 200 of plastic parts pack, and rubber motor for ducted fan engine previously available these exciting checks direct from Iden­ testing. The Hornet is designed to meet in this class. The 25 VF DF is Schneurle tity Check Printers by sending their the Embryo rules, including all bonus scavenged, with twin ball bearings, and current check for $10, a voided sample point requirements. Micro-X tech­ an Aluminum/Brass/Chrome (ABC) check, and a sample deposit slip. Mail to nology assures an easily-built kit that not p is to n /c y lin d e r c o n fig u ra tio n . Exact Identity Check Printers, P.O. Box 149-D, only looks good, but achieves flights of specs include a displacement of .248 ci Park Ridge, IL 60068 or call (312) 992-0882 long duration for the competitive flier! (4.07cc), bore of 18mm, stroke of 16mm for additional information. See your local Micro-X dealer, or and weight of 8.11 oz. When run on 15 ★ ★ ★ write to Micro-X, P.O. Box 1063, Lorain, percent nitro, the engine will develop Micro-X, manufacturer and supplier OH 44055, for further information. maximum thrust befween 20,000 and of indoor model kits and hardware, has * ★ ★ 26,000 rpm.

TML Manufacturing's new 4 hp Quadra (Q50I- Metal Concepts' carb for .65 engines.

MAY 1983 9 Bolink speed control unit for R/C cars. Twin-K R/C car racing "meatballs" in 1/8 and 1/12-scale sizes. (Please note: This engine is designed is done by means of a simple plug-in system on the market, and with the specifically for ducted fan usage and is pigtail braid.. . no soldering or return to expandable number of channels, a not designed to perform as a standard the factory is necessary. Another feature novice flier can start small, expand the aircraft powerplant. O.S. makes an is a new gimbal stick with all mechanical radio to fit later projects, and not be aircraft version of this engine, the O.S. trim. stuck with buying a new radio every time 25 VF.) The best news about the Expert Mark 9 he starts a plane that needs additional This engine is available exclusively is the price. World has priced the Mark 9 from World Engines. Systems to compete with any entry-level Continued on page 87 Now, for those who may be in the market for a new radio, consider the fact that World Engines’ Expert Mark 9 Radio Systems are now available on all the new frequencies recently approved by the FCC. W orld’s Radio Repair Dept, is also able to convert any Mark 2, 3, 4, 5, or 9 System over to the new bands, although they caution against jumping frequen­ cies unless there is a really good reason to do so. The existing frequencies (pre- FCC Rule Change) will still be legal for the next five years, and unless there is interference on those bands, there is no reason not lo continue operating on them. The Expert Mark 9 Transmitter can be purchased in four, five, six, or seven- channel models. Servo reversing and throw adjustment are standard on all channels. The transmitter may be bought as a four or five-channel unit and later expanded to six or seven channels, providing a radio system which can grow along with the user’s abilities. Expansion New CMB/3.5 Marine engine available from TEJA Engineering Co.

Craft-Air's new aerobatic sport trainer, the Scout 15. Wendell Hostetler's Plans’ 1/3-scale Piper Vagabond.

10 MODEL BUILDER Hungarian Moki 25cc two-cycle has mild tim ­ Dave Williams' bar stock .049 will turn One of Dave Williams' monoline 1/2A ing, but should pull 30 lb model. over 40,000 rpm with tuned pipe. speed models. F/G fuse on Cox 1/2A pan. misprint. I said and mean! 38,000! Dave told me that under ideal conditions, it has turned 41,000. Eat your heart out Gene Hempel! How is it constructed? What’s it look like inside? Here are a few general LINES observations. It has twin ball bearings, FUELSJOE K L A U S E schneurle porting, a steel piston and P. O. Box 2699 wrist pin, hard chromed steel sleeve, Laquna Hills, CA 92653 and a very specially designed and con­ structed tuned pipe. The third photograph will give you a • Any honest columnist probably will model. Whether something that massive bit more of an idea of its construction. tell you that one of the most difficult is still a model is a moot point to me. Just one glance at that massive crank­ parts of writing any column is to come Undoubtedly, many modelers will dis­ shaft will convince you that it’s designed up with a good lead-in. Well guys, this agree with me on that last comment. My to not come unglued. month I don't have a particularly good apologies for perhaps a narrow view­ The fourth photograph shows one of one .. . not that I ever do ... none­ point. Dave’s speed models. Beautiful work- theless, here goes. The background Regardless, the M oki is obviously well theme of this month is, “ Once again, constructed, its timing isquite moderate, Continued on page 89 you read it first in Model Builder.” and although I did not have an oppor­ Naturally enough, the subject is an tunity to test run it, its design would engine . . . correction, several engines. seem to indicate that it will be mild First on the list is one called the Moki. tempered to operate. Take a glance at the first photograph. OK, depending upon your viewpoint, Thai's a Moki. Please, resist the temp­ we’ll now go from the ridiculous to the tation to coin a slang expression about sublime, or vice versa. The second the name. The engine is manufactured photograph shows a bar stock .049 in Hungary, and without any money- engine built by Dave Williams of Yorba ing around, this Moki is monstrous! In Linda, California. Dave has been devel­ fact, its displacement is 25 cc! Unless my oping this design for more than a year, conversion calculator screwed up, that’s and it seems like a good possibility that a bit more than 1.5 cubic inches. Yes, it’s his efforts may soon result in a new a two-cycle glow engine, ringed, and speed record. It’s designed for tuned well . . . it’s big. pipe operation, and while I can’t go into Without going into a lot of other finite detail, let me say that I have seen it details, the manufacturers claim that it bench run at over 38,000 rpm on an This Rossi Brothers twin mount unit will readily power a 25 to 30-pound honest tachometer. Guys, that's not a will V-mount two .61 to .81 ci engines.

Partially completed Williams bar stock 1/2A engine. Crankpin One of the latest four-stroke engines to appear on the market is pressed into hefty crankshaft. is this .90 ci Enya. MAY 1983 11

MODEL BUILDER

If you were to attend and/orexhibit at New York, and Toledo, Ohio, respec­ Puyallup, Washington, White Plains, nearest to them. The exception to this is model trade shows that we will have Model Exposition, WRAMS, and Weak many of the products. same faces, Theonly exhibits,variation comes from and the smaller manufacturer/exhibitors located, and being the oldest showtype, of its it draws the largest crowd, and attended by the springtime season the is over;winter/ 1983 IMS, NorthwestSignals; located in California, Pasadena, tively. all of these shows, as we do, you see the Toledo show. Being more centrally consequently, the largest number of who only participate in the show that is • There are four open-to-the-public PUYALLUP

in W O R L D %'* By BILL NORTHROP Interesting HO articulated locomotive cars pulls passenger First in Precision Scale, Aircraft, Best and of Best Show, this 12 This This Spitfire Mk X II Modelers, was 1st in Yakima, Military Washington. Sport Scale, built by Frank Rouse. Valley Aero Iv out of a tunnel on one of several layouts on display. Curtiss Fledgling by Fred (Pas-M-Co) Pierce, of the Boeing Hawks. Fokker DR-1 was 2nd in Precision Scale, built by Erv Solberg, Remember the all sheet balsa Veco Dakota? Here's one with SRAC, Snohomish, Washington. pulse rudder R/C by Trevor Johnson, of the Boeing Hawks.

Harvey Wagner, Auburn, Washington, really put detail on Sprint cars looking wilder every year. This one built by Sand this USS Missouri, BB-63. It was second in Stand-Off Scale. Kahne was second in Plastic Models. exhibitors. If a manufacturer can only travel to one show a year, this is it. By the same token, many manufacturers plan the announcement of their new prod­ ucts to coincide with the Toledo show, and consequently, there usually aren’t any truly new products to report on until then. With all the above in mind, and considering that the Northwest Model Exposition is the newest kid on the block (second year), we felt we should, for the benefit of those manufacturer/exhibi- tors and modeler/spectators who did Second Prize in Sport 40 Class went to Gary Teeter for his "Miss Circus Circus" V-31, not participate, give you our overall Puget Sound Model Boat Club. impression of the show in case you’d want to consider attending next year. First of all, there’s the matter of pronouncing Puyallup. Al Alman has already tried to help in his column, when he moved from Arlington (you can’t go wrong on that one), Texas to Puyallup. When pronounced correctly, it sounds like "Pew-all-up” , but all shoved together into one syllable. We’re not sure if it’s an Indian name, or if someone was trying to imitate the sound of a large raindrop striking a water puddle. If coming by air, you fly to Sea-Tac (Seattle-Tacoma) Airport. We’re not sure about limousine service to Puyallup, but if you rent a car, it’s about a one hour Nice finish is obvious on Tony Huber's Little Toni, which placed first in Pylon static drive south on Interstate 5, and then east competition. PROPS Club. MAY 1983 13 The world's first (1910) seaplane, the Fabre Hydravion Canard, as modeled by Francis Reynolds of Redmond, Washington. Pilot had excellent visibility!

This Outlaw Off Road Sprint car by Bud Coffman, WORRCA, won Best of Show Car trophy plus first in class.

OrLine's latest is this giant scale Fairchild 22, for reduction drive or up to 2 cu. in. gas engines.

A line-up of unlimiteds on display. Dick Strep's "Miss Budweiser" placed 3rd in class. "Miss Lynwood Equipment", U-7, by Howard Price, RCU Club. Five sad tails from the Northwest Pylon Racing Association. Oh well, you can't on 512. There are a couple of other roads about nine miles to 1-5 on 512, there are win 'em all. to Puyallup from I-5 that look shorter, plenty of large motels to choose from. but using 512 makes it all freeway By the way, this writer was stationed years later? driving. in the Seattle area during a portion of Our impression of Puyallup is that it’s Accommodations, for those traveling WW-II, including Sand Point NAS, Pasco kind of a laid-back, semi-suburban, from far enough away to stay overnight NAS, and Whidbey Island. In late 1944or semi-farm town, about 10 miles south­ in the area, are more than adequate. early 1945, I was assigned to a new CVE east of Tacoma. The Western Washing­ Having conquered the correct pro- type aircraft carrier that was built in the ton State Fairgrounds occupy about 12 nounciation, we weren’t afraid to con­ Tacoma shipyards. It was the U.S.S. city blocks (three x four) on the edge of tact the Motel Puyallup, which is within Saidor, CVE-117. I was a meteorologist town, near the exit from 512. With a walking distance of the fairgrounds. (the Navy called it aerologist), and a complete baseball park, an amusement Only a stone’s throw away, is Jason’s plank owner (member of the commis­ center that includes a roller coaster, the restaurant, open 24 hours a day .. . not sioning crew). Do you need more than huge exposition hall, and many brightly real fancy, but good food . . . sort of a one guess as to what room number I was painted smaller buildings, and animal Denny’s with a liquor license. By driving assigned at the Motel Puyallup about 38 exhibit stalls, it must be one heck of a

14 MODEL BUILDER John Gorham flies the scale Hirobo "Lama" for the grandstand And Tony Frackowiak does the same with Miniature Aircraft audience in the fairground ball park. Supply s Schlueter Heli-Boy.

Excellent selection of scale models. Frank Macy (seated behind box) is bring­ Lots of precision aerobatic aircraft. Part of 450-model display. ing back many of famous Jim Walker models. Photo taken before show opened Sunday. colorful sight when the fair is in full jackets. on Sunday. Based on the favorable o peration. It is b ille d as the eighth The Northwest Model Exposition is reports from last year (in spite of the largest fair in the U.S. put on by the Mt. Rainier R/C Society, temperature), there was a substantial Of course, fairs are for summer with Bob Pfeiffer as overall director. increase in both exhibitors and specta­ weather, and as such, none of the Under Bob’s leadership, assisted by Bob tors for this second show. buildings, including the Exposition Hall, Bean, Don Sweasy, and about 75 of the The Exposition Hall is divided into are normally heated. Last year, during Mt. Rainier club members, the whole four bays, by solid walls, with a wide, the model show, the temperature was show was very well organized and open passageway in the center of each said to have reached a high of 42°F in the maintained a relaxed, laid-back atmo­ wall, connecting all bays. The largest hall! This year, two huge space heaters sphere throughout the weekend. This is bay, at the north end, was occupied by with powerful blowers had been sus­ its second annual show,and considering the exhibitor booths and model display pended from overhead, making it very its newness, it is doing very well, with a comfortable for light sweaters or sport gate count of over 12,000 by noon time Continued on page 87

Sleek Monocoupe 90A by Ikon N/West. Latest 1/5 scale Nice Grumman F6F-3 Hellcat placed in Military Sport Scale, Hawker Hurricane nosing in from left, not yet in production. by Bill Osterhoudt. MAY 1983 15 4. Guy Hanson holds the latest Team Hanson FA I model. 2. A 1/32 ply wall extending from the wing saddle to the top Jittery servo motion was cured by switching TX module and receiver. of the fuselage effectively seals the pipe from tank and radio. (D%«g By DICK HANSON

• Spring flying is here for most of us pipe at the No. 1 bulkhead, and be left Another project we have been w ork­ now, and with it come the latest winter with just one potential leak problem ing on is a direct drive (no gearbox on projects, ready for test flying. . . . the tailpipe. The pipe’s shape solves the engine) model for F.A.I. This model This hobby would get old fast if it this problem because it points almost has been rehashed thrice, starting with wasn’t for the limitless approaches to straight out of the aft fuselage so that a the Formula 750, and it is now 825 square design. Just when you think, “ I guess I’ve small silicone coupler and a short tube inches, 7 lbs. 10 oz. with retracts, and still topped out,” something new comes up complete the job. By sealing the pipe at goes like a shot. which starts the old brain humming bulkhead No. 1, we need only minimal The model in Photo 4 flew fairly well, again. For me, the greatest pleasures heat shielding inside the fuselage for but just wasn't solid-feeling. I was testing come from working the problemsout of radio protection. some potent servos in this plane, and a new project, be it a design, a kit, a A few well placed slots in the fuselage suspicioned that the problems it had radio, or whatever! take care of internal cooling. Exit slots may have been due to the servos jum p­ One problem which plagued me was for cooling air flow should always be on ing around in tiny, unpredictable move­ finding a good exhaust system for some the upper areas and preferably in low air ments. new projects. Photo No. 1 shows the pressure points on the fuselage. The best My suspicions were confirmed by new "Mac” muffler. Although the Mac place is just behind the canopy. The changing the transmitter module and is designed for Tipos and Curares, it’s combination of low air pressure and replacing the receiver. The new fre­ perfect for internal systems. The follow ­ thermosiphoning will keep everything quency tested was on F.M., and the ing photos (Nos. 2 and 3) show how the cool. Air intakes for cooling can be just results were profound. The model was pipe actually fits in my C.A.P. 21. about anywhere on the front lower now rock steady. The earlier lack of solid The real benefit of this ten-degree surface of the model. In our case it’s on feel was probably due to a spurious bent pipe is that you eliminate the need the lower edge of the fire wall on the signals going to the servos. for specially bent header pipes. In most radio side of the fuselage. It seems we are all presently caught in cases, rotating the pipe a few degrees There have been some writings about a technological paradox. As our equip­ will point the inlet at the engine exhaust the horrible problems of heat buildup in ment gets more sophisticated with port. A simple but effective trick. We fuselages using internal systems, but the accuracy reaching new plateaus, the also eliminate the need for a second most elementary rules of heat flow, same technology is filling the air with coupler at the header pipe which is properly followed, will keep you out of signals from radiophones, paging sys­ usually the case when installing special trouble; it's just like making a fireplace tems, industrial RC, and god-only- headers. work properly, the draft is at the front On the C.A.P., we can now seal the and the chimney goes up! Con tinned on page 84

1. The exhaust pipe is temporarily blocked up on the outside 3. The receiver is placed under the servos while the battery of the fuselage to show how it fits around the top of the wing. pack is placed under the fuel tank. 16 MODEL BUILDER By STAN WILSON . . . Here is a really versatile electric sport plane that can be built in either rudder/elevator or aileron versions with either 05 or 075 electric motors. It builds quickly, too!

• As a youngster of 34.1 do not remem­ I think that a model should look like a former. It almost jumped out of my hand ber the excitement that came with the real plane. on the first launch. It climbs to about 300 first glow engines. H ow ever, I was I wanted a plane which would be feet in the first 30 seconds. I have obsessed with the first stories about capable of simple stunts, capable of performed multiple loops, rolls, and flying radio controlled models using flying in 10 mph wind, and steady split-S maneuvers with very little loss in electric motors. I started using w ind­ enough for relaxed Sunday flying. I altitude. The only drawback of using the shield washer motors and motors from searched over 200 magazines for models standard 075 is its short motor run (three cordless trimmers. I destroyed four of which had these characteristics. After to four minutes). I cured this with a these home-brews before I bought my noting the dimensions of over 20 cabin throttle, which I will explain later. With first Astro 05. I stuffed it in a Super jobs and about 10 airfoils, I settled down this throttle, I can climb to the desired Malibu, and the thrill was worth the to put them all together. I eventually altitude, perform a few stunts, then effort. My next success was with the came up with what I call the Pleaser. switch to low speed and just putter Kraft electric Cardinal. I retired it with The original model now has over 100 around the sky for five to seven minutes. about 200 fligh ts. .. and several ounces flights using two power plants. I first I am currently flying my second of epoxy. I then built and flew the Astro used the Astro 05XL. This gave very Pleaser. With this one, I extended the Sport. This is a fine model, but I wanted pleasing flights, and was very stable. It wing by one bay on each side, which something that more nearly resembled a would climb to about 300 feet easily,and slowed down the glide speed substan­ real airplane. I have been building and could perform loops and very slow rolls. tially. I would not, however, recom­ flying rubber scale for over 10years,and I fly with a four-channel, miniature mend the longer wing for use with an 05. Cannon radio. For all of my flights with CONSTRUCTION the 05, I used coupled rudder/aileron. FUSELAGE: I designed the Pleaser to After mastering this power plant, I installed my Astro 075. What a p er­ Continued on page 72

Stan Wilson launches his Pleaser into hot This is what the Pleaser looks like just prior to covering and final assembly. The equip­ Oklahoma afternoon air. Hat is a necessity. ment is actually more complicated than the model!

MAY 1983 17 18 MODEL BUILDER

Storm systems, like this one which passed through Southern California last January, often bring fantastic slope soaring conditions with beautiful cloud formations and strong lift. Ross Keim's aileron Sagitta 600 is captured on film in the midst of a turn. area of R/C soaring is the White Sheet Radio Flying Club’s newsletter, the White Sheet (appropriately enough!). It is a very informative and entertaining mini­ magazine that runs about 20 to 28 pages R/c SOARING (6 x 8-1/4-inch format), and is expertly By Bl LL FORREY PHOTOS BY THE AUTHOR edited by Sean Walbank, with whom I frequently correspond. The following rather lengthy, but • If you are a soaring devotee, particu­ champion ... someone who is not so rather complete description of Sean larly one whof ollows the contest ci rcuits, wrapped up in himself that he can’t or Bannister’s wing construction technique you probably have heard of a guy named won't help someone else. You could say and philosophy is (believe it or not) only John Brown. John likes to go to the that I’m impressed with peoplelike John an excerpt from a larger story in the Nationals and enter his two meter class who give of their talents and abilities so White Sheet about the Algebra Vlil. I Icarus in unlimited class events . . . and that others may profit from them. believe you will profit from what you are win. He has thermal duration contests I love R/C soaring. I have from the about to read, and who knows, you may pretty well figured out, and he flies them very first time that I brought my first R/C even want to give this technique a try on very scientifically. Well, here’s some­ glider to a slope site in Westchester, your next sailplane. thing you may not have known about California back in 1975 . . . and someone “ THE WORD ACCORDING TO the guy: he’s an altruist; someone who like John Brown was willing to take the BANNISTER, BY SEAN WALBANK cares about others. time to teach me how to fly my Astro “ On Wednesday the 19th of May, a I call your attention to the photo of Flight Monterey. It’s not just the flying number of White Sheet RFC members two adults and two children sitting on that I love,it’salso the people,and glider were fortunate enough to attend a the grass of an athletic field. The person guiders are among the best in the w orld! ‘seminar’ given by Sean Bannister on the holding the glider fuselage is John If someone at your flying site needs your topic of F3B to the Boscombe Down Brown. If it isn't obvious to you, he’s help, take the time to be a friend and Modeling Club. To those of you who instructing a newcomer with a Wanderer help him or her . .. it's worth it! think that they have heard the name in the fine points of setting up an R/C NEWS FROM ENGLAND before, but can’t remember where or sailplane prior to the tyro’s first flight. If One of the most interesting and when (one assumes that you have so­ you ask me, THIS is the mark of a true worthwhile publications I read in the journed the last five years in Dahomey),

John Brown, three-time national soaring champion, instructs When the winds are up, Ross Keim can be found flying one a small group of first-time fliers. of 8is slope machines over the cliffs of Costa Mesa. 20 MODEL BUILDER Sean Bannister (Great Britain) waits for the start of "prep The British team held "repair demonstrations" periodically at time" at 1981 WC”s in Sacramento. He holds the Algebra V III. the 1981 WC*s. Geoff Dallimer, foreground, was chief fixer-upper. then it should be sufficient to remind made concerning the construction of E-205 is that it has a theoretical polar you that Sean Bannister has represented the Algebra into various sections as this advantage insofar asitsglideangle,but it Great Britain at all three World Soaring is how he dealt with the topic. is inferior in minimum sink (duration). Championships to be held, and at the " Airfoil Section: The Algebra uses an He believes that he can overcome any last one he placed second. He is general­ Eppler 193 at the root and there is a slight disadvantage that the E-193 might ly accepted to be one of the finest fliers linear transition out to an Eppler 201 at possess with its ‘inferior’ glide angle by in the world, and his Algebra design and the tip." (See this m onth’s airfoil, wrf) practice and smooth flying . . .his results its imitators are to be seen at competi­ “ In fact, the tip section isn’t an exact speak for themselves! tions throughout Britain... E-201 . . . what Sean did was to have a "Wing construction: As you can see “ ALGEBRA computer plot the transition from the from Figure 1,some of the construction “ The following piece is a long-hand 193 to the 201 out to an imaginary tip rib is already shown. Sean begins the wing version of the notes that I managed to jot of 14 cm chord and then used the by cutting the bottom sheet (from 1/8- down when Sean (discussed) his Alge­ section given for 17 cm which is the inch medium sheet balsa) to exact bra. This is the actual model which he actual chord width at the tip (the span of shape. The ribs are drawn on, and the flew at the last World Champs and, as he the current Algebra is three meters). The trailing and leading edges are brought is quite satisfied with it, he intends to E-201 has virtually the same zero lift up to the sheet. The majority of the ribs continue with its programme of refine­ angle as the E-193, and therefore there is are made from 3/32 sheet balsa, and ment over the next season or two. This no need for any wing twist (washout) to these are glued in with Hot Stuff. The policy of gradual refinement is one that be built in. If the wing were to be built ribs are spaced 30mm apart. Sean firmly advocates . . . once you have on a perfectly flat surface, then there “ There is no conventional spar in the decided upon a model, stick with it and would be four thousandths of an inch wing of the Algebra. This is not to say don’t change until you have a very good washout ... try measuring that! that it is weak however, as there are reason to ao so. Sean admits that when “ When questioned about alternative certain structural members which act in he first flew his Algebra, he thought that sections, in particular the Epplers 205, the same manner. One of these is the he had made a mistake . . . his contest 211, 212, and 214, Sean referred back to ballast tube which is made from 1/2-inch record shows just how wrong that first the principle of finding a section that o.d. high tensile aluminum. As this tube impression was.” (The photo of Sean you get on with and then sticking with it stretches from the root out to almost 2/3 Bannister reveals an almost perfect top for at least a year or two. Sean finds the of the span, it can be seen that it adds view of the Algebra VIII. wrf) E-193 competitive, and therefore sees no considerable structural strength. The "I have divided the points that Sean need to change. His comment on the original weight of the tubes came out to

Team Pantera fliers Roger Roth, Larry Jolly, and John Brown Dennis Brandt will probably enter his modified Sagitta 600 in pose for the author's camera at P.S.A. field. See text. the 1983 2MWC this June 11 and 12. See April MB, page 93. MAY 1983 21 RESIN BRUSHED 9-1/2 oz. for the pair, but Sean has had ONE SHEET OF ALONG L.E. FOR them turned down so that they taper POLYETHYLENE SHEET GLASS CLOTH which has saved about three ounces of ADDED HARDNESS weight out near the tips where it is important to keep things light. This ballast tube runs down the middle of the wing. BEADS OF RESIN ON POLYETHYLENE "As mentioned earlier, there is no BUILDING BOARD SHEET GO HERE . . . CAPILARY ACTION main spar, but in between each rib there \ ‘ < \ ATTACHES CLOTH TO THE SHEET is webbing which takes the load. On earlier Algebras, Sean used 1/2-inch ballast tube for most of the wing (see mum area for the top sheet to be glued vertical blocks of balsa as webs, but on Figure 2), but outboard of the aileron to. This process is much quicker than the the most recent version he has changed servo (again, approximately 2/3 of the original use of 1/2-inch balsa blocks. the material. Now he cuts one-inch wingspan) they taper down to just one After the top sheeting has been added, cubes of blue foam (2 in x 1 in x 1 in at the row of one-inch cubes in front of the thisstructure forms a wide I-beam which root) which he then glues between the tube. After the webs have been glued in is fully capable of spreading the loads ribs using a mixture of wing skinning place, Sean simply uses a ‘hot wire’ to cut imposed upon it. epoxy and micro-balloons. These webs off the excess material, and in this way are put in both in front and behind the he ensures that they provide the maxi­ Continued on page 81

Theoretical glide polars (left) and coordinates (below) for Eppler 193 and 201. Data from Model-Technik- Berater 2, Eppler-Profile.

EPPLER 193 X: 100.0 99.66 98.64 97.11 95.02 89.41 82.10 73.48 Y: 00.00 0.051 0.220 0.522 0.932 1.957 3.214 4.642 X: 64.05 54.31 44.67 35.40 26.70 1 8.78 11.97 6.525 Y: 6.112 7.436 8.332 8.603 8.213 7.284 5.957 4.352 X: 4.383 2.652 1.344 0.465 0.026 0.129 0.819 2.044 Y: 3.487 2.608 1.740 0.915 0.190 -0.375 0.838 -1.252 X: 3.791 6.049 12.03 19.78 29.00 39.28 50.15 61.06 Y: -1.588 1.841 -2.098 2.061 1.807 -1.430 1.019 0.645 X: 71.48 80.88 88.79 94.79 97.00 98.64 99.65 100.0 Y: 0.350 0.153 0.048 0.010 0.032 0.034 0.014 00.00 EPPLER 201 X: 100.0 99.65 98.65 97.07 94.98 89.37 82.05 73.43 Y: 00.00 0.058 0.250 0.589 1.042 2.141 3.454 4.923 X: 63.98 54.22 44.57 35.28 26.56 18.64 11.83 6.396 Y: 6.419 7.754 8.644 8.895 8.471 7.496 6.112 4.443 X: 4.264 2.547 1.258 0.407 0.011 0.187 0.964 2.258 Y: 3.545 2.632 1.731 0.876 0.128 0.488-1.046-1.574 X: 4.055 6.341 12.30 19.91 28.88 38.82 49.44 60.27 Y: -2.041 -2.437 -2.993 -3.227 -3.157 -2.776 -2.131 1.444 X: 70.75 80.30 88.42 94.62 96.91 98.60 99.64 100.0 0 .005 .010 .015 .020 C0 Y : -0.839 0.386-0.107 0.025 0.051 0.045 0.017 00.00

22 MODEL BUILDER ■

One of the many new electronic devices at the IMS show was this Ace R/C RF Interface unit which attaches to the Ace Datamaster and increases its versatility. Condor Hobbies' new Tele-Tachometer, a Tx/Rx system for obtaining airborne info. Electronics Comer By ELOY MAREZ

• This year’s International Modeler complete R/C systems, was a veritable Show had some unexpected competi­ cornucopia of electronic items. The tion. The beaches! The Southern Cali­ recently introduced Silver Seven Re­ fornia temperatures over the weekend ceiver, a companion to the transmitter of January 8 and 9 were in the 80s. Even of the same name, looks extremely so, thousands of us gave up the sea and interesting, with some impressive speci­ sun (and the bikinis) to spend the fications and modern design features. A weekend in Pasadena viewing the latest large number of accessories and test goodies on display by dozens of the equipment was on display, all intended nation’s leading model manufacturers to provide more flexibility in the use of and suppliers. The show received gen­ our equipment, or to help us keep it in eral coverage last month in the “ R/C top-notch shape. The newest, not-yet- W orld” column of this magazine. This advertised item from Ace, a most useful month, I will touch briefly on the new, and interesting device, is an RF interface and not so new, but still interesting and for the Datamaster. It greatly simplifies worthwhile, electronic products that the measuring and setting of transmitter were on display. channels, as it is no longer necessary to ACE R/C read the output at the receiver. This new As usual, the Ace R/C booth, one of device attaches to the transmitter an­ our main suppliers of everything from tenna with a clip, and plugs into the California Slope Designs Duncan Lites the smallest electronic component to Datamaster. A switch selects the channel for night flying: ready to install and fly.

Cannon R/C Systems Protacho tacho- DaCa Products displayed its new Power and Test Panel at the IMS show. The unit comes meter works off of prop or flywheel. in two models: digital or analog meter readout. MAY 1983 23 € > v o

Electronic Model Systems featured a Thunder Tiger Tachometer from Hobby Kraft Systems has nothing to hide . . . wide variety of servos and accessories. Shack is an optical, handheld unit. here is a look at the "guts" of the KPS-28. being displayed, and the pulse timing is ASTRO FLIGHT power needs: Astro Flight, Inc., 13311 read on the Datamaster. This year, we saw once again a com­ Beach Ave., Venice, CA 90291. To review, the Datamaster is a pulse plete line of motors, batteries, and CONDOR HOBBIES meter, used to measure the transmit­ chargers for all phases of electrics at the C ondor H obbies, 17835 Sky Park ter’s pulse timing, the basis of the servo's Astro Flight booth. Circle, Suite F, Irvine. CA 92704, was center and travel. Using one, you can Relatively new, and certainly impres­ here with a large assortment of elec­ center all channels exactly alike, and sive, are Astro Flight’s cobalt motors, tronic goodies gathered from all corners adjust their travel with great precision. brought to you by the same technology of the world. Most interesting, and You can set low rates to the exact degree w hich has brought m iniature stereo certainly unique, is something called a desired, and if you have two airplanes, systems to all those funny, headphone- ‘‘Tele-Tachometer” , which, believe it or you can adjust the trims for each one wearing people whom we see jumping not, accurately tells you the engine’s prior to flying. The more you use it, the and bobbing just about everywhere rpm, and actual airspeed of your model more you wonder how you ever got these days. . . . while you are in the air. It does this along without it. These are probably the most efficient with a radio system that is used in a The Datamaster RF Interface will be electric motors, in terms of power to manner which is reverse to our normal priced at less than $15, and w ill be weight ratio, of any being made today. way of thinking ... the transmitter is in available as an add-on for those who The secret is the stronger magnetic flux the air with the airplane while the already owns a Datamaster. Sometime in available from cobalt magnets. How­ receiver is on the ground! The airborne the future, a Datamaster II, or some­ ever, a lot of research was required to unit is very small, lightweight, and easy thing, with the RF interface included, arrive at the best combination of arma­ to install or move from one aircraft to will probably be available. tures, commutators, brushes, etc., But another. The receiver is a hand held For more information, write to Ace arrive they did, Astro Flight cobalt unit, which at first glance, one takes to R/C Inc., Box 511D. Higginsville. M O motors are available in four sizes, 05,15, be a tachometer, as it is in that size 64037, and include $2 for a 100-page 25, and 40. Contact Bob for complete range. It even includes an on-the- catalog of Ace products. information, and for all your electric ground adjustable stall warning. When

Owners of EK R/C equipment will be glad to hear that Full Did you ever hear a drowning glow plug? Northeast Engineer­ Command Systems now has EK replacement parts and accessories. ing's new audio transducer helps you get rapid starts. 24 MODEL BUILDER T O m E le ctro n ic Devices

•M o 01

WAS sr*o»t p ■ MO 01 Γ } 0

••mamawemve mrtu/r •MDOt* •Ml/a /r O .t 03

No, it's not a Star Wars movie prop, its a Powermax wind speed indicator! n ru n m tu a m • M O 0 4

Radio Controlled Models' most complete line of electronic lighting equipment. has available the Protacho, a small 3-1/2 X 5-7/16 inch direct drive tachometer Here is a complete line of Ni-Cd powered which reads engine rpm in three ranges. glow plug starters from McDaniel's R/C. Proper positioning of the switches will give you 0 to 3200, 0 to 11,000, or 0 to 31932 Calle Winona, San Juan Capis­ 28.000 rpm. Pickup from the engine is trano, CA 92675, has available the most done with a direct drive sensor, which is popular light system as used locally by held lightly against the spinner for the these night people. It’s a complete duration of the reading. A rubber tip system of high intensity lamps, lenses, cone is furnished on the sensor which wires, prebuill and tested printed circuit can also be held against the side of a board assembly, that comes ready to flywheel, for readings on engines so Just a few of the many accessories and install. Being lightweight and self- equipped. components available from Royal Electronics. contained, it is easily movable from one Contact Cannon R/C for complete model to another. Order yours directly information on this and all of its other the model reaches a preset speed, an from CSD for $24.95; Californians don’t fine products: 13400-26 Saticoy St., audible alarm goes off. Seems like an forget the six percent tax! North Hollywood, CA 91605. ideal way to test models, props, fuel, CANNON R/C SYSTEMS DACA MODEL PRODUCTS engines, etc. This device can also be Operating under new ownership, used with boats and helicopters. Con­ In addition to producing what is probably the smallest and lightest R/C DaCa still has available those handy, sidering the capabilities, it is not all that equipment in the world. Bill Cannon has extremely well designed and built field expensive at $149.95. been slowly but surely filling out his boxes and caddies. It also showed a new CALIFORNIA SLOPE DESIGNS product line to include more and more power panel, more accurately described Would you believe pylon racing at high quality items of necessity for the as the Power and Test Panel, in two night? Or night flying at all? Well, it is modeler. And what can be more neces­ models. It provides all of the normal being done . . . in both cases. One sary to the serious modeler than a electrical field requirements from a wonders if maybe they use bats for co­ precision tachometer; the volume of the single 12-volt source, for starter, 1.5 or pilots? noise by itself is not the best measure of Anyway, California Slope Designs, an engine’s performance. Cannon R/C Continued on page 76

Royal Products had an unusual way of calling attention to its L. R. Taylor and Co. displayed its fine line of power panels line of Titan servos. Take a look at that price! and chargers. The Power Pacer detects bad Ni*Cds. MAY 1983 25 --2 Γ· = · ·

Wilshire Model Center's Hans Weiss launches Bill Winans' Olympian F3E model over the Bill Winans poses with his Olympian, a beautiful Pacific Ocean. Unfortunately, this Malibu site may be sold soon. Larry Jolly Model Products kit, between flights. Both are superb fliers. -ELECTRIC < By MITCH POLING

• The two geographic leaders in electric visit Flans Weiss at W ilshire M odel The IBA PB-26isafiberglass-fuselaged, power, without much question, I feel, Center, and take a look at the latest Geist electric sailplane of 2.6 meter span (eight are Germany and Southern California. motors and the ready-to-fly models built foot), which is designed for the Keller 50 This is so because of individuals, and it by IBA Fertig-Modelle. or the Geist 40 series of cobalt motors, goes to show that one or two people can The IBA line of planes is quite impres­ and flies 4-1/2 pounds all up with eight really make a difference in how and sive, unlike most ready-to-fly planes, to 12 sub-C cells. This plane is compe­ what happens. The Boucher brothers they are handmade of balsa and ply­ titive; it was flown to first place in both (Bob and Roland) are what made it wood. They are finished in clear resin,so the European championships and the happen in Southern California,and Fred the natural color of the balsa shows German championships in 1982! I can M ilitky, Heinz Keller, and Fritz Geist through. The result is a model that really believe it after seeing the plane. were (and are) the ones who made it looks classy. The workmanship is im­ Such high quality and performance move in Germany. maculate, it says “ German precision” all from a plane that requires so little work Fred M ilitky passed away (of cancer) a over it. other than the installation of a radio and few years ago in Germany, and I would like to make a belated acknowledge­ ment of his achievements, which in­ cluded electric free flight, R/C elec­ trics, solar power, plus man-carrying electric flight, all in the early 70s, when most of us hadn’t even realized that electric flight was possible. His death was a great loss to the electric flight movement. Fortunately, in Germany, Keller, and Geist had taken up the challenge, and produced their samarium cobalt motors. These motors really revolutionized what could be done with electrics, making even pattern possible. The planes flown in Europe rapidly became quite sophis­ ticated compared to those here in the U.S. The benefits of these technological advancements are available here in the U.S. from Wilshire Model Center (3006 Wilshire Blvd., Santa Monica, CA 90403). Wilshire imports the Geist motors, and many of the German planes. During my Here's Bill with another LJMP kit (and MB plan No. 3831), the Electricus, which is a Christmas vacation. I had the chance to perfect beginner's electric model or S.E.A.M. 2-Meter/05 Class competitor. 26 MODEL BUILDER a motor does have its price though . . . it Hans the philosopher contemplates all the aerobatic maneuvers which can be performed is $259.95 from Wilshire Model Center. with this IBA PB-24 pattern/pylon model. Clear satin-like finish. On the other hand, those with a desire for high performance and having little airfoil (my guesstimate is that it’s about cheap, the price is $240, ready-to-fly time for building will find that this plane eight percent thick). It is designed for except for the radio and power package. will do all they could ask for. motors in the Astro 15 to 25 range, or At this time, a plane like this with a The other IBA plane, the PB-24, is Keller 30, Keller 50, or Geist 40 motors. It cobalt motor is the ultimate in per­ designed for speed, sport, and pattern. is obviously designed for speed, and I formance in electric flight, so you get Again, it is entirely made of balsa and think that cobalt motors are the best way what you are paying for. plywood, with the satiny smooth, clear to go to get the ultimate performance in The Geist motors for powering these resin finish, which shows off the wood this plane. The flying weight of the PB-24 planes are at Wilshire M odel Center too, grain so well. It spans 48 or 52 inches is about 4-1/2 pounds with a four- in both direct drive and gear drive. The (you have an option), with a very thin channel radio. Again, high quality is not model EM 40/14 is the most popular, the 14 refers to the number of sub-C cells usually used. There are also models EM 40/16, and 40/18 as well, for even higher Continued on page 80

Airtronics Kitty on takeoff over the Hans' student Jose Prado Is all smiles Pacific Ocean at Malibu, California. after his first solo R/C flight.

Inside the Carrera Primus lies a clever universal joint between the motor and the folding prop. Carrera motors and other accessories are carried by Wilshire Models.

Bill Winans' Olympian carries the Geist 40/16 motor with gear reduction and folding prop. Geist motors top to bottom: EM 40/14 With 16 sub-C cells for a power source, the combo really performs. with slip-on torque ring, EM40, and EM30. MAY 1983 27 Stuart Richmond really enjoys two things: "his ever-present Many flights require intentional spins, spiral dives, and holding stinkin' Sunday cigar", and flying his R/C Clipper on weekends. "down" elevator to escape Florida thermals.

By STUART RICHMOND . . . Here's a medium-sized Clipper for .09 to .15 engines that fills the gap between the rubber powered Clipper Junior and the original gas powered Clipper .. . with Carl's blessing!

• The most beautiful curves in the world turned in flights of over a minute. It was good rubber powered design to carry are on a woman’s body! I think the next my favorite model for a long time. the increased weight of an ignition most beautiful curves appeared in the During W W -ll’s earliest days, I was engine . .. the crash was complete . . . I graceful, elliptical wing planform of R.J. lucky enough to get a Super Atom as my had failed! Mitchell’s Spitfire fighter, and a series of very first engine. Quickly, I built another About 1970, while at the Nats with my historical free flight models designed by Clipper Junior kit, bolted on the Super sons, I met Carl Goldberg for the first Carl Goldberg. The Carl Goldberg de­ Atom, installed the Smith ςοίΙ and time. During that brief but ever so signs started about 1937 w ith the condenser, the Austin timer, the pen cordial conversation, I mentioned my Valkyrie, included the Clipper in 1938, in cell batteries and related wiring. fond memories for the rubber powered 1939 the C lip pe r Junior fo r rubber Test glides are remembered as being 36-inch wingspan Clipper Junior of power, and shortly there after probably pretty fast .. . and the wing seemed to bygone days. From the conversation, climaxed with the Zipper and Sailplane increase its dihedral a bit during those Mr. Goldberg kindly sent me a complete around 1940. glides over the tall grass. The maiden set of plans from the long-out-of- As I was too young in 1939 to know powered flight saw the wing’s dihedral about the curves on a woman’s body, I increase moments after launch . . . then production model with the beautiful was attracted to the Clipper Junior that increase more as speed built up from the elliptical curves. I put them away with was kitted by Comet Model Airplane Super Atom’s thrust. . . then rapidly the my few other modeling treasures for and Supply Company, and sold for $1.00 dihedral increased until the wing folded over 10 years. Frequently they were complete with enough rubber to make it and structurally failed, only seconds taken out and admired . .. then carefully really fly .. . and fly it did! It was the first after the launch. I was about 10 years old refolded and put away. model I ever built that consistently . . . I knew nothing about changing a About a year ago, I had the plans out

Two fuselage sides are built on top of the plan to ensure accuracy. The R/C Clipper's wings are strengthened by a spruce and balsa Hot Stuff bonds sides to 1/4-inch ply firewall. I-beam spar system. Center sheeting retains graceful curves. 28 MODEL BUILDER

1/4Μ1/2

The Basie Outlines. H Under Th, Pm a P ric Onto The W ith o Bo

30 MODEL BUILDER MAY 1983 FULL SIZE PLANS AVAILABLE - SEE PAGE 98 31 r

Al "takes five" inside the BIG Bird Carrier and reads his favorite Bruce Edward's beautiful Canadian Fleet biplane weighs mag. Note wing slings under van's ceiling. about 20 lbs and uses Quadra engine with Zinger 20 x 8. Shame on you, Eloy Marez, for belittling an American invention and tradition. Have you ever stopped to wonder how well your indoor plumbing wouldn’t work, or how impossible it would be for you to charge your batteries, if it weren’t for the ubiquitous backhoe, and its ability to make a place for all that outside pipe and conduit? Watching a good backhoe operator is akin to watching a good ballet; we’re talking about sheer poetry in motion. And also, being familiar with the old overnight ferry between Christchurch and Wellington. RUFFLED FEATHERS you wouldn't let emotions prevail, and New Zealand, I’d have to agree with you From the amount of letters and calls just had to confuse the issue with cold, that it probably was the original “ Love received, it’s apparent that I’ve ruffled hard facts. I've never denied that some Boat” . .. but how can even that kind of quite a few Mode One feathers. And of the top T.O.C. fliers used Mode One, stimulation compare to watching a really, all I did was postulate a very including Hanno himself. But so what? It “ natural” backhoe man working a septic obvious theory of evolution. Now I have only goes to prove that these particular tank? Gad, now there’s a memory. .. an inkling of what poor-old Charlie people are “ faulted” and unable to cope MAG-AERO K-21 Darwin must have had to put up with. . . with primary controls on the right stick The K-21 was not a very popular As most of the communications that I as God meant them to be; so, as a result, engine because of its lousy power-to- received on this subject were similar to they need a mechanical crutch in order weight ratio . . . weighing almost as the "open letter” by Eloy M are/ (al­ to get the job done. much as a Quadra does with its mount, a though none were as eloquently ver­ Fourth, and last . . . the disparaging decent muffler, and a six-bolt hub . . . bose). I’ll direct my comments to Mr. remarks about backhoes. Tsk! Tsk! and because it put out hardly more than Marez . .. especially as he seems to have volunteered to champion the Mode One Cause. First on the agenda, Eloy. is the fact that you referred to the kiddie programs I mentioned as "cartoons." You should have done your homework before pecking at your typewriter, because although “ Sesame Street” does have some animation, the bulk of it. and ” Mister Rogers,” and "VegetableSoup,” and "Electric Company” are not car­ toons, but "live” programs tailored to help lots (of all ages) learn. (And for your information, I happen to enjoy the skits on "Electric Company.” ) Second is the sneaky way you poked fun at my weight problem, all the while revelling in your being able to disappear by simply turning sideways. You couldn't know of the anguish I faced every year trying to convince those smug, skinny, flight surgeons that being overweight was not my fault: that I had a gland problem . . . and the gland, itself, weighed over 200 pounds. Here's another Bruce Edwards BIGgie doin' its thing . , . This one's an Aero-Fly powered by Third, like most all Mode One types. a Mag-Aero which hauls the 11-3/4 pound bird around pretty well.

32 MODEL BUILDER If done right, this "poor man's supercharger" or velocity stack does This low-cost K-Mart Spark Plug Cleaner comes complete with bag of make a performance difference. (Edwards' Fleet.) abrasive and gap gauge. Other brands are similar. half the Quadra's thrust. Two other stack is soldered to a tin plate which is reasons the K-21 has been ignored are its held to the Mag's carb by its long forward facing spark plug, and its exces­ mounting bolts; the Quadra stack is sively long magneto cover and mount. flared at the bottom, inserted into the Local BIG Bird lover, Bruce Edwards, white plastic carb plate and then has been working with and flying this epoxied to that plate. (Bruce roughed 21cc Mag-Aero in an attempt to over­ up both the plastic and the flared tubing come some of its drawbacks . . . and area prior to epoxying, and has had no here’s what he has to say: problems for the 15 hours.he’s put on it "Couldn't do anything about the since.) The 60 to 70-degree angle that forward-facing plug, although I don’t the stack tip is cut to should, of course, consider that to he such a problem: be facing forward to take full advantage there's a good half-inch of clearance of the ram effect: in a sense, a velocity between the prop and the plug lead. stack is nothing more than a "poor Pulled the head to see if the plug could man's supercharger .. . that works." be put to the rear, but found that was not And here’s Bruce’s explanation about possible because of the porting. how to get that Mag-Aero closer to the " However, I was able to do something firewall. . . about increasing the power and reduc­ "Take a 3mm Allen wrench and re­ ing that awfully long overhang. I'veseen move the flywheel cover/engine mount an increase o f 800 rpm (static) just by combination; this leaves the flywheel going to an RC-/-7Y plug, adding a sticking out 1.3 inches. A new mounting velocity stack to the carb, and using a plate is made from 1 /8-inch hard alumi­ 40:1 McCullough gas mix . . . with four num and a 3.2-inch hole is cut in this new ounces of Nitroethane added to the plate . . . and new mounting holes are gallon of fuel. After trying out a small drilled for the engine case and firewall. fortune in props, I found that the K-21 in The case mount bolts will have to be my "Aero-Fly” does best in the air with a metric and preferably of the counter­ 16x8 Zinger. sunk type. You’ll also have to cut a 3.2- " About the velocity stacks: they're inch hole in the firewall to accommo­ (approximately) two-inch long pieces of date the flywheel and it's a good idea to copper tubing, the one in the Mag-Aero have a thin ply bulkhead separate the being 3/8-inch ID while the Quadra's has a 1/2-inch ID. The smaller diameter Continued on page 74

Here's what last month's BIG Bird Stooge looks like all put together and in use. There’s some­ E&L Manufacturing's Big "E " is an Evra- thing beautiful about simple things that work really well. powered, sporty, tail-dragging low-winger.

MAY 1983 33 REVIEW UPDATE tail rotor as standard equipment. You As with all reviews, I like to follow up may recall that the SuperMantis that I and let you know of any changes the reviewed had an engine to main rotor products have undergone since that gear ratio of 5.6 to 1. This gives an time. In the July and August ’82 issues of extremely high rotor speed with the Model Builder, I reviewed the American engine running below its peak power R/C SuperMantis. Two weeks ago at the curve. The new gearing for the Super­ IMS trade show, I had the chance to sit Mantis (as well as the fixed-pitch Mantis) down with John Simone Jr., and to go will be 8.5 to 1. This brings the engine over the new additions to the Super- speed up and the rotor speed down. Mantis. I was quite pleased with what Now the engine as well as the main rotor John had to say. will run happier. From the main rotor to The SuperMantis’ performance will the tail rotor the ratio will be 1 to 4.75. To be enhanced with an optional tail rotor put all of this in terms that make some shaft drive. This eliminates the green sense, if the engine is running at 12,000 belt that has been with American R/C rpm the main rotor speed will be 1,412 Modified SuperMantis tailboom mounting for years. The shaft drive option kit rpm and tail rotor speed at 6,707 rpm. block. includes a new tail rotor gearbox as well Compare this to the old ratios of 12,000 standard kit. Well, they’re going to. It as the front-end gears from the main engine, 2,143 main rotor and 9,644 tail will be called the ‘‘UltraMantis’’ and sell shaft. The retro-fit kit will sell for $60.00, rotor. for under $300.00. The factory hopes to and will be adaptable to all present A few other notes tell me that there have it released a month and a half after Mantis or SuperMantis kits. (Highly will be an extended collective yoke for the Toledo trade show. This puts the recommended by yours truly. I haven’t those who want to try inverted flight. release date anywhere from late May to seen the kit yet, but the gear setup and This goes for around $10.00. If you do sometime in June. the ratios are correct.) want to try inverted, I would suggest that Standard features will include: cone There is also a cone start kit available. you stiffen-up the head rigidity more start with holes drilled in the side frames This consists of an extra “ starter” shaft in than what moving the damper pinsall of to accept the cone start assembly: tail front of the main shaft. At the bottom of the way in will do. Fit a piece of plywood rotor shaft drive: all red anodized the starter shaft is a timing gear. In place between the yoke and damper pins, at aluminum with black offset trim; long of the belt groove on the engine is least... yoke on the rotor head for inverted another timing gear with a one way There is also a new tail boom mount­ flight: and the new-style tail boom bearing (sprague clutch theory). A ing block (see sketch). This will eliminate mounting block. The only other changes timing belt runs around the timing the old screw-stripping-out-of-the- will be a slightly modified canopy, and gears. Now you have a cone start system mounting-block syndrome that hap­ an engine to main rotor gear ratio of 9.5 without all of the alignment problems pened with tail boom ground strikes on to 1. (Tail rotor stays at 4.75 to 1.) This will and vibration complications present in a the old attachment method. And, the let you run a tuned pipe with a higher typical cone start system. main frames are warranted for life engine rpm and still keep the rotor To fit the cone start to existing Super­ assuming that they are kept to factory speed at 1,400 to 1,600 rpm. There is also Mantis side frames, a few holes will have specs. (No extra holes drilled in the the possibility of an optional auto­ to be drilled to accept the cone start frames.) Sounds like American has been rotation assembly. bearing blocks. This shouldn't be too pleased with the performance, as well as To make a complete package, Ameri­ much of a problem for the average customer acceptance, of the molded can will be offering a scale fiberglass modeler to contend with. The cone start side frames. fuselage of the Hughes 500D and 500E add-on presently sells for $54.95, but At this point you might be asking why models. The 500E is a new version of the rum or has it that this price may be American doesn’t put all of this into a 500 with a slightly pointed nose instead coming down soon. The best news about the SuperMantis is that the newer-style ki,ts w ill have the new gearing of engine to main shaft to

Newton's Third Law states: "For every action Here's an easy way to visualize the function The tail rotor's sideways thrust causes some there is an equal and opposite reaction." of the tail rotor (just for plank pilots!). "side slipping" known as translating tendency.

34 MODEL BUILDER This sketch shows what happens to the tail rotor when collective This sketch shows what happens when a tail rotor command is given, pitch is added to the main rotor on a Heli-Boy helicopter. Note the change of pivot points. of the eggshell shape that has charac­ BACK TO BASICS: If the nose wants to go left, naturally terized the 500D. If you like both ver­ TAIL ROTOR THEORY AND MIXING the tail wants to swing to the right of the sions, then you can have your cake and SIMPLIFIED . . . WHY A TAIL ROTOR? chopper’s centerline. The tail rotor must eat it too. because the canopy alone It is Newton’s third law of motion that produce a thrust to keep the nose changes the D to the E. One fuselage, states, "For every action there is an equal straight. It does this by blowing air to the two canopies, and you can fly with two and opposire reaction." He would have right, which provides thrust to the left. different looks. The fuselage is fashioned made a good helicopter pilot because To make this easy for all you plank pilots from epoxy glass and will be high he realized that something affects every­ who are reading this, refer to Figure 2, quality. I know that at last year’s MACS thing else. Nothing could be more true where I have stuck an airplane onto a show, American showed some proto­ as we look at tail systems in helicopters. helicopter. Essentially, the propeller type 500’s that looked very realistic. The As most of the helicopters on the blows air back, and the airplane moves fuselages will sell for $175.00, and are market today have clockwise-rotating forward. recommended for the SuperMantis or rotors, I’ll use that rotor rotation for my LIKE A SMALL MAIN ROTOR UltraMantis, just so the SuperMantis has illustrations. Consider Figure 1. The You can also think of the tail rotor as a the tail rotor shaft drive. John suggests rotor rotates clockwise. Given Newton’s small main rotor which has been laid on that if you have a fixed-pitch Mantis, do third law of motion, the nose wants to its side. Notice that the tail rotor in­ not add the scale fuselage since the extra rotate OPPOSITE, or counter-clockwise. creases or decreases thrust by collective weight will not handle well with fixed All single-rotor helicopters must have pitch. Both blades change lift together pitch. some torque compensation device, so a to produce more or less lift in the Look for the 500 fuselages to be out at tail rotor is added to prevent the un­ horizontal plane. Collective pitch in the the same time as the UltraMantis. For wanted rotation of the fuselage. (I have main rotor produces more or less lift in further info, write or call American R/C purposely exaggerated the size of the the vertical plane. There is no such thing Helicopters, 635-11 North Twin Oaks tail rotor airfoil so that you can easily see Valley Road, San Marcos, CA 92069. the airfoil and the thrust that it is Phone (619) 744-7533. producing...) Continued on page 84

PIC OFF POINT MOVES PICK OFF POINT MOVES FORWARD, PIVOT POINT FORWARD, R. TAIL MORE R. TAIL INPUT PIVOT POINT

Figure 6 depicts the Kavan-type mechanical mixer going through a Tail rotor inputs look like this with the same Kavan mechanical type collective pitch command. mixer. The pivot point becomes the collective servo. This month's photos were taken at the 6th Annual IMS show in Pasadena last January by Roland Baltes. The P*39 pictured here is Joe Zimmerman's Best Military R/C Sport Scale winner (also Q.S.A.A. winner). ments would be made. A second reason for using the 1984 FAI rules for that one event is that just about two weeks after the Nats, we will be selecting an FAI team using those rules when we meet at Louisville, Kentucky. In a nutshell then, the Nats will encompass the usual R/C and CL events. However, the events listed as CL No. 27, Precision Scale and R/C No. 36 Precision Scale (FAI) will both be using the FAI • I don’t know . . . would you consider a be used internationally until the 1984 rules accepted at the last CIAM meeting year a small one, if it was a “ scale” year? event in Paris, it was determined that in Paris. As a result we will in essence Well, 1983 looks like a BIG sca/e year. they would be used this year at the Nats have four sets, or levels, of sport scale: Contests are bubbling up all over the at Westover. The reasoning for this Giant, Sportsman, Expert, and FAI (a place, scores of new kits are appearing decision was based on the following: as kinda precision, kinda stand off) Control on the scene, engines are popping up all we would not be eliminating any event Line will have the usual Sport Scale and over the place (especially four-stroke), or model, and would indeed be broad­ FAI. Now that was easy wasn't it!? and interest is running high among ening the base of competition, this A new feature of the Nats this year will "scalers” . In order that you can prepare would be of value. Any type of scale be something that old time free flighters for the super year, let me pass on a few model, be it an old precision, or one of will smile at and say, "Tain't completely little facts. the newer breeds of stand off (that many new.” There are a number of seminars One major event will be the first East people have considered "precision") and workshops being developed to Coast Nats in many a year! As has been would be acceptable as no measure­ provide for the non-competitively ori- true for the last two years, the Nats will offer Giant Scale, Sportsman Sport Scale. Expert Sport Scale, and FAI Scale. The last event mentioned, FAI Scale, will differ quite a bit from years past. The international community, more pre­ cisely the FAI, has highly modified the R/C and CL events. In essence, they have eliminated precision as there will be no "hands on” judging of the models in the future. Certain ateas of the judging will be done from three meters, and others from one meter distances. A ruler w ill not be used, however. A problem then developed concern­ ing this year's Nats. The old "AMA Scale” became the same as the prevail­ ing FAI rules during the last rule-making George Harlan of Irvine, California brought this 1 /4-scale Monocoupe 90-A. On Sunday, he took cycle. As the new FAI F4C rules will not home his Webra .91 powered model along with a Best Giant Scale trophy.

36 MODEL BUILDER Bob Parcell of Riverside, California showed this beautiful A-26 Another beautiful warbird was this P-38 by James Burnett of Irvine, Invader, and took home 2nd in Military Sport Scale. California. Model was Best Military R/C Precision Scale.

ented scale modeler as well. All AMA “ Tom” Sawyer State Park in Louisville, this change. It would seem to me that a special interest groups and manufac­ Kentucky. We will be selecting both the model would have to be somewhat turers have been contacted and asked if control line and radio control teams to more flyable than some, or most, of the they would participate in this program. represent the United States in Paris, old precision models. On the other NASA (National Association of Scale France in 1984. The complete program hand, it will probably require a model to Aeromodelers) has agreed to develop for this event was given in the March ’83 have a greater amount of detail than some programs. Well-known scale mod­ issue of Model Builder. The co-CDs for some of the sport scale models we have elers will be on hand to provide demon­ the weekend will be Monty Groves of been campaigning through the years. strations, and pass on hints and tech­ California and Dale Arvin of Indiana. The models, as friend John Preston niques for such things as detailing, While NASA is chiefly responsible for suggests, that have to have “ mud on the documentation, construction tech­ the development of the event, th’e rudder pedals” to fit the documentation niques. etc. These will not be limited Southern Indiana R/C Modelers will and the judges scrutiny, just are not specifically to R/C. provide the local support. The static necessary any longer. We can under­ At the Quality Inn HQ there will be judging will occuron Friday,and flying is stand how much detail will show up manufacturers’ display areas as well as scheduled for Saturday and Sunday. The when judged from the one-meter dis- hands-on demos and seminars. This facility at the park provides very nice stance used for part of the judging convention w ill take place toward the services for this type of an event. There is procedure. What won’t be nearly so end of competition week, most likely a large indoor area to accommodate evident, will be that part of the model Friday, Saturday, and Sunday. There is static judging, and there are very nice which is a tad over or under size, or the the possibility that Thursday may be flying areas. missing needles on the instrument faces. added as the response in these early The selection process will employ As an editorial aside, may I say that I stages of development has been quite those rules which will be in effect at Paris view this with mixed emotions. I mourn enthusiastic. The planning meeting in in 1984. Therefore, instead of selecting the passing of precision, but I certainly Springfield, Massachusetts revealed a nine members (three Precision R/C, understand the rationale for its demise. high level of interest in the Nats. The three Precision CL, and three Standoff Catering to the very small group, that local modelers were very helpful to the R/C) we will be selecting six members as was to be found in the precision ranks, committees, and local businesses have the Precision and Standoff have been was suspect. By moving in this direction, been very supportive. There are many merged into one event on the FAI level. I it is possible that we will see an increase points of interest for a family staying in would love to be able to give some solid in the “ population base” as the event the area, perhaps turning the Nats into a hints on how this event will work, but interests many more people. On the family vacation as well. golly, I’m just as far in the dark as most of other hand, I sincerely trust that it will A second big event this year would you must be. I am certain that out there not weaken the quality of the scale appear to be the Team Selection Event to in Scale-land there are a numberof be held August 12 through 14 at E.P. people pondering the many aspects of Con tinued on page 70

This beautiful 1918 Curtiss JN4-D2 "Jenny" earned Ron Karwacky This four-cycle powered Handley Page 0/400 by Steven Pfister of of Riverside, California a 2nd in Military Precision Scale. Santa Paula, California took 3rd in Military Sport Scale.

MAY 1983 37 ° I 133HS I '°

38 To order full size prints of these drawings, see ad on page 69. MODEL BUILDER 2 Of 2 2 Of SHEET SHEET

1 / - 1 t i i 1 \ & —I

' í í r ΐ Γ IM Λ . /

__ _j L 1 L l J-4

To order full size prints of these drawings, see ad on page 69. MAY 1983 39 Fiberglass Dumas Hotshot 45 at rest. Model Dumas Hotshot 45 at speed. Author's wooden version was slightly faster, but Jim's F/G Hotshot belongs to Jim Burba. 45 wasn't completely "worked-out" due to its relative newness. R/C PO W ER By JERRY DUNLAP BOATS

DUMAS HOTSHOT 45 IN FIBERGLASS anyway, it seems like a reasonable Burba, is a finish carpenter at one of our Recognizing that many model boaters decision on the part of Dumas Boats. I area’s ship building firms, and he knows prefer the convenience of a prebuilt don’t know if this same decision has what to look for when evaluating boats, boat, Dumas Boats released a fiberglass been made on all their fiberglass hulls. It whether they are models or full-size. version of the Hotshot 45 about halfway shouldn’t really affect the sales of the The area I feel is most critical on a through last year’s racing season. Having boat. fiberglass tunnel hull is the bottom of designed the Hotshot 45,1 certainly had The quality of construction on the the sponsons. When a straightedge was considerable interest in how the fiber­ Hotshot 45 was very good. Sure, you applied to the sponson bottoms of this glass version of the wooden kit would think to yourself.. . Like he's going to boat, the surfaces were flat, both length perform. I was able to talk Jay Brandon, knock his own boat? Well, the evalua­ and width-wise. This is something that “ Mr. Dumas Boats," out of a prerelease tion of the 'glass construction was done needs to be checked carefully on all version of the boat. What I mean by this by one of my model boating friends to is that the boat came without instruc­ whom I gave the boat. My friend, Jim Continued on page 90 tions that would normally be provided for the individual purchasing the boat. The most noticeable difference in this fiberglass hull, compared to previous fiberglass boat hulls from Dumas Prod­ ucts, is the lack of a gelcoat finish. The fiberglass Hotshot 45 is available only in a clear polyester resin version. There are a couple of advantages to not using gelcoat on the model. The first one is the price. It is less expensive to produce a clear resin hull than one with gelcoat. There is also a savings in weight when the gelcoat is not used. As most model Radio and fuel tank compartment details include rudder and throttle linkage, on-off switch boaters will paint over the gelcoat linkage, and water-tight plastic film can lid for charging lead access.

■ ■

Jim's Hotshot 45 features this trick weight compartment for trimming The use of an adjustable motor mount is highly recommended. K&B hull. F/G hull is foam-filled for floatation. 7.5 with Octura 447 or 450 prop is good combo.

40 MODEL BUILDER 1. Ray Van de Walker, CD of the SAM 49er 1982 Fall Bi-Annual 2. The only way to fly . . . Texaco! Note Otto Bernhardt's method of contest says, "The girls really ran this meet!" timing. Taken at SAM 49er contest, Taft, California.

At the same time this contest was being held, the SCAMPS were putting on their SCAMP Fall F/F Annual. Forthis reason, Pond did not enter the R/C p m s p a p k i events on Saturday, preferring to try his luck at free flight. Naturally, tne needle By JOHM POND valve was plugged up! When cleaned the motor could not be leaned out. About that time, as seen in Photo No. 3, Otto Bernhardt came by and said, “ Let • This columnist has been neglecting able amount of tule fog. To boot, the me try my luck on the motor." the Southern California contingent in weather forecaster had predicted rain The first thing you don't do is to prime his reporting of old timer activities on Saturday, but Ray knew what he was the motor with Coors! Despite objec­ simply because he could write a column doing as a contest director. . . he put in a tions, the motor was again assembled devoted strictly to the myriad of events reservation for good weather, and most with some careful eyeballing of parts, staged all year-round in California. of the time he got it!! and the motor would still not get above a However, the provincial look is some­ To show you how good Ray had things four-cycle run! General conclusion was thing this columnist tried to avoid, i.e., organized, Photo No. 1 shows the regis­ that the needle valve was too small in the reporting of activities only in local tration desk as manned by the girls: diameter (there are three or four varia­ areas. This can get a trifle boring after barely visible on left is Mrs. Fred Lem­ tions of Ohlsson 23 needle valves) as the awhile. berg in charge of frequency control, valve was all the way down, yet fuel However, with nothing cooking for Marge Bernhardt on registration, Wanda leaked by the sides! That’s O tto ’s story; I the rest of the year, and looking at a two Patterson on recording, and Mrs. Doig still don’t think Coors was the answer! to four-month dearth of old timer generally available for timing and relief. (For those who were unable to decipher contests, the information and photos No wonder Ray had time to fly and have the title on the hat, it reads, “ I love submitted by Ray Van de Walker, Con­ a good time! beer” .) test Director, was most welcome. Photo No. 2 will probably bring a loud Everybody has to have a big model, Ray reports the SAM 49er 1982 Fall Bi- outcry from the ERA girls when they see and Bill Cohen is no exception. Photo Annual held on November 20 and 21 how hard Otto Bernhardt is working. As No. 4 shows his huge, 10-foot Comet enjoyed good weather for that time of can be seen, this is a typical Texaco Clipper undergoing some trouble the year at Taft. Most modelers will flight . . . everyone is relaxed. This is shooting. One thing about these large recognize that at this late time of year, what we are talking about when we say models, you never suffer from lack of the valley does suffer from a consider­ to join SAM! spectators, advice, and misguided help.

3. Whadaya mean Coors won't make it run?H "King Otto" explains 4. Bill Cohen's ten-foot Comet Clipper always attracts a crowd, the intricacies of an Ohlsson 23. Note Pond's hat! especially when having motor problems!

MAY 1983 41 5. Gordon Codding of Kingman, Arizona sent in this 1940 vintage 7. Art Thoms of New Jersey, seen here with an .020 Request, showed photo of modeling activity at Western and Rosecrans. up for the R/C events at the AMA Lincoln Nats. Class A 1. Ross T hom as...... 19:32 2. Doc Patterson...... 12:58 3. Bill H a m n e r...... 3:34 Class B 1. Don Carll ...... 17:27 2. Ross T hom as...... 13:16 3. Doc Patterson...... 7:00 Class C 1. Ross T hom as...... 21:00 2. Doc Patterson...... 19:26 3. Fred Lehm berg...... 17:37 "Pure” Antique 1. Doc Patterson...... 25:59 2. Ross Thom as...... 24:04 3. Don Carll...... 18:44 Texaco 1. George Wagner ...... 37:22 2. Ted S a to ...... 25:01 3. Ron D o ig ...... 22:51 1/2A Texaco 1. Don Carll...... 25:52 2. Bob Angel ...... 24:35 3. George Wagner ...... 23:34 6. Al Grier says the only way to beat John Pond's Dallaire is to beat it with a claw hammer. Before wrapping up the report, it Omahawk Field, Nebraska. might do well to point out a new event being tried by the 49er Club. This is the Although Bill didn’t win Texaco, he did Looking over the results, if there had "Pure” Antique Event where all motors win the beauty for Old Timers at the been a Sweepstakes Winner, it would must be pre-1950 ignition, and models recent IMS Trade Show. As one wag put have been Doc Patterson going away. As are not to be scaled. It will be interesting it, "It may not be the most beautiful, but it was, George Wagner of the SAM 41 to see if this catches on. there sure is a lot of it." San Diego Aeroneer Club took top If Saturday wasn’t so good for weather, SAM CHAMPS 1983 Sunday afternoon between two and honors in Texaco, thereby earning him As probably most of the readers are possession of the "Bent Prop” Trophy three saw all the models that flew during aware, the Society of Antique Modelers for a year. this time emerge as winners. This was Annual Championships will be held particularly true of the Texaco Event. Let’s look at the results: on July 19, 20 and 21 at La Junta, Colo-

8. Frank Fisher (left) and Art White team up to get Art's Kloud King 9. Buck Zehr flew R/C O.T. and F/F O.T. on Wednesday and Friday airborne for an official Texaco flight. of Lincoln Nats. Busy boy! 42 MODEL BUILDER 10. Now this is what a well-built Kloud King should look like. Master craftsman Bob Oslan made this one and supplied the author with this picture of it. rado. More information will appear in Class C ignition, you can't fly Class C "SAM Speaks" as so ably edited by Jim glow for points. Here are the point Adams. events: We don't have much info on the free 1) Class A Glow or Ignition (not both) 11. Have you ever seen a C.H. Grant twin flight events, but we did receive a letter 2) Class B Glow or Ignition (not both) tractor? Jim Adams says this design is a bit from the Eastern SAM Vice President, 3) Class C Glow or Ignition (not both) tricky to launch. Taft, California. Woody Woodman, who is directing the 4) Texaco Only Old Timer R/C Assist Events. He has 5) Antique or "Pure" Antique (not run. If in doubt as to which ones these submitted the following schedule: both) are, refer to your 1982 SAM Rulebook. All events must be declared prior to You know these events are required to Tuesday, July 19 the start of the meet if you are compet­ be run! Class C R/C Glow ing for the All Events Championship. ENGINE OF THE MONTH Class A R/C Glow On the electric event, at present, this This month’s feature engine is another Class C R/C Ignition has not been fully defined as to whether one of those little known engines origi­ Electric R/C (morning only) there will be an 05 size event and/or an nating in the San Francisco Bay Area. We Wednesday, July 20 unlimited event(s). This is yet to be are indebted to David Brodsky for the Antique resolved. Contest Director Woodman kind use of his engine to make the Antique "True Ignition" does note that if entries in the regular correct drawings. (This writer no longer Class A Ignition events are too high, there is no question trusts manufacturer’s drawings, etc.) Class B Ignition that the electric event will be restricted The Apex Skylark as it was known in Class B Glow to one. the '40s, was produced by Apex Motors, Thursday, July 21 Just as soon as Jim Thomas, Contest Berkeley, California. Actually, the en­ R/C Texaco Manager, and his free flight contest gine was produced in three variations, R/C 1/2 Texaco director firm up the free flight events, completely ready-to-run for $14.75; a The 1982 SAM Rules will apply in all we will publish them. However, you can semi-finished kit for $5.75 each; or a cases except where the contest director depend on the BASIC EVENTS to be semi-finished kit with unfinished cylin- may change flight times and engine runs if he finds the field is overcrowded with entries in a particular event. Of special note is the so-called “ True Ignition” Event where nothing but pre- 1950 ignition engines may be used for power. However, a tricky deal evolves on the glow and ignition events. If you are trying for Sweepstakes (or All Events Champion), you must decide which of the basic events you will fly for points. In other words, if you goof in

12. This is Henry Struck's classic method of designing a removeable motor mount as re­ created by Don Dodds.

MAY 1983 43 14. Simply gorgeous Miss World's Fair being wound by Tom Alden. Note holding jig on inside of fender. 15. Dave Saso of SAM 21 really likes this 1/2A Texaco version of the Eastern States Gas weight dural with phosphor-bronze Champ. bushings, a crankshaft of hardened and 13. Bob Stalick sends this shot of John lapped steel, and a balanced dural web. engine with the spark lever perpendicu­ Rossello launching his nice-flying American The crankcase was made up of split lar (so that the spark would occur at top Ace. Near Albany, Oregon. aluminum castings utilizing phosphor- dead center of the piston travel), it was bronze main bearings. claimed the engine would do equally der at $5 each. A dural timer of "banjo” design, well in either direction. This meant you The Skylark was aimed at the machin­ employed auto ignition type adjustable advanced the timer against the direction ists and students taking machine shop points with the breaker cam and pro­ of the propeller rotation. How about practice. The semi-finished kit was peller washers made from dural. The that? extolled as a good deal for pleasure and carburetor was quite simply an Austin The last bits of technical dope would profit. The company claimed the type needle valve with a choke quite be the bore at 7/8 in. with a stroke of 7/8 finished engines would find a ready sale reminiscent of the Brown Jr. engine. in. giving .67 cu. in. displacement. Rated among their friends. The company Running instructions revealed that horsepower was 1/5, either air or water recommended using a regular auto coil the engine was rated from 400 to 5000 cooled. Weight of the air cooled version and battery for testing to avoid the more rpm, propeller size not specified. Inter­ costly coil which was also offered. estingly enough, when starting the Continued on page 91 For the neophyte machinist, a com­ plete set of assembly and w orking drawings were provided showing every operation quite clearly and simply. Fortunately, for the newcomer, finished Shrimpo arts in the kit included: cylinder assem- Cly, piston pin, piston ring, spark plug, timer spring, ignition parts, and gas OLD TIMER Model of the Month lines. Designed by: Malcolm Abzug To top things off, all materials and Drawn by: Al Patterson castings necessary to complete the Text by: Bill Northrop engine were provided. This also in­ cluded bolts, nuts, and gaskets. Spark coils would have to be purchased separ­ ately. • We’ve mentioned on several occa­ and gaining speed, picked up.” And For those who were interested in sions that many old-tim er designs were from here on, the model was called the saving a buck, for 75« less you could do published without names . . . Lanzo's S-3. your own brazing of the cylinder attach­ Record Breaker and Ehling Contest Now then . . . the byline for the article ments. However, the trick was that you Winner are good examples. At first gave two names . . . Malcolm Abzug and had to hone the cylinder after welding. glance, it appeared that we had another Richard Wachtell. Did Abzug design it, The directions for running the motor one for this month. The title for the or did Wachtell? The drawings were called for six parts of gasoline to one part construction article for this old-timer, in done by Abzug. Maybe Abzug designed of SAE 70 oil. The description of how to the November, 1937 issue of M.A.N. was it and Wachtell wrote the article. Or hook up the motor (without a wiring as follows, “ How to Build a Pee Wee Gas maybe Wachtell built the model from diagram) was rather sketchy. Unless you M odel.” But luck was with us this time. Abzug's plans. knew your ignition setup, this writer In the second sentence of the first Hmmm . .. S-3. . . Didn't we do an S-4 could see problems for the beginner. paragraph, the author casually mentions old timer a little while back? Yup . . . in One interesting fact was gleaned, and that, “ . . .in a few months, the first October 1980. we published Malcolm that was a setting of .010 gap for the Shrimpo was dodging pop flies at the Abzug’s plans from January ’39 M.A.N. ignition points. Good info! local ball park.” In the next sentence, he for a 36-inch span gas model called the For those collectors who have missed said, " , . .and the third Shrimpo, the S-4. Looks like Abzug gets design credit out on getting one of these engines present one, was designed and com­ for the S-3, doesn’t it? If anyone can complete, the cylinder was made of pleted at the end of last fall.” confirm it. let us know. special steel tubing with the manifold Okay . . . so far so good . . . Shrimpo it Anvway, the Shrimpo ... or S-3, is a and port housing brazed to the cylinder. is . . . or is it? In the second paragraph, clean little model with a 44-1/2-inch After welding, the unit was heat treated we are told about (what might have span. )ust right for an .049 or an .09, (stress relieved), bore reamed, and been, as it happened in late 1936) the depending on whether you like ’em honed to finish fit. first gas model to be flown indoors, and cool or hot. It should also be just right Cooling fins attached to the cylinder quite possibly the first one to be flown for 05 electric power and three-channel were pressed-on aluminum. The engine on a te th er, G -line style, or R.T.P. lightweight radio. The article calls for featured a silicone alloy piston; other ('round the pole). But now the author balancing at one-third of the wing chord parts were a piston ring of gray iron, a writes, “ With engine barely popping back from the leading edge. hardened and lapped steel piston pin over and set for a run of 45 seconds, the Enjoy your Shrimpo S-3 Pee Wee gas (hollow), a connecting rod of light­ S-3 rolled along the polished (gym) floor model! ·

44 MODEL BUILDER Plan No: Hdl'QJ,

MAY 1983 FULL SIZE PLANS AVAILABLE - SEE PAGE 98 45 This is the fully assembled Expanded Scale Voltmeter (ESV). The package that the actual meter came in doubles as a pattern for cutting the holes in the mounting box. This saves a lot of assembly time. Expanded Scale Voltmeter By MITCH POLING . . . Keep an eye on the voltage level of your six-cell Ni-Cd battery pack during its next charge with this economical ESV. Your batteries will have more power, and live longer too! • Do you have a six-cell pack for your dollars for the charger. A Sunday flier or it a try. It has only three electronic parts; Leisure 05, Astro 05XL. Cox Fibrini. or Sunday driver is hesitant to put that the meter, a zener diode, and a poten­ 1/12-scale car or off-road vehicle? If you much into a charger; he is, after all, in it tiometer, all readily available from Radio have, then you have most likely heard for fun. not competition. But if it were Shack. When it is finished, it is just about the advantages of "digital charg­ cheaper, wouldn't it be neat to have that plugged into the charger you already ing” . Digital chargers have a voltmeter extra edge on power and endurance? nave, then plugged into the battery that shows the voltage increase in Well, you, can, for less than fifteen pack, so there is no rewiring of anything hundredths of a volt as the charge dollars! An expanded scale voltmeter you are already using. That’s simple, and approaches its peak. When the voltage can display voltage changes in hun­ easy! Now. of you have one of those peaks (stops rising), you turn off the dredths of a volt too, and you can see the "black box” chargers with no meter, you charge, and go fly, or race. You have the meter needle move up to the peak. It’s can see what is going on. You won’t have maximum power and endurance, be­ dramatic, and as you can see the motion, to start with a fully discharged pack, and cause you have the most charge in the it is not a "numbersgame” , it’s more like you w on’t have to wonder if you are pack that it will accept before it starts to watching the second hand of a clock. overcharging. overcharge. That is more ‘‘real” in many ways, If all this sounds good to you, let’s get This method is so good that serious compared to a digital display, as you do started! You will need the 50 microamp competitors nearly all use it, whether in not have to worry about exact values. meter, 270-1751. a 9.1 -volt zener, 1N4739, car racing, pylon racing, or FAI glider This meter has been kept very simple, a 50 kilo-ohm potentiometer, 271-219. a competition. The only drawback to this to encourage those who have never project case, 270-221, and a pair of male/ is the price, usually close to a hundred built anything with "electronics" to give female connectors. All but the con-

There really aren't that many parts to the ESV, just a box, meter, Here is the wiring diagram for the ESV. This is intended for fast 50k pot, zener diode, and connectors. charging six-cell packs.

46 MODEL BUILDER Usinga 9-volt and a 1.9-volt battery in series, set the meter to full Remove the 1.5-volt battery and check the zero point on the meter, deflection. Each division is now .030 volts (1.5v/50). With the 9.1-volt zener diode, needle shouldn't move. nectors are from Radio Shack. The minus leads of the input and output nect them to the lug as before, by connectors will depend on what your plugs to the lug with the minus sign. touching them to the lug, then melt charger and battery pack use. Some of Solder the minus leads only; these are them on. As there are two ends to do this these connectors are “ rare birds” , so it always coded black if there is color way, it will take a little ingenuity to hold may be easier to buy whatever con­ coding. If parallel molded cord is used, it all together, but persevere! nectors are available and use them to the minus lead will be smooth, the plus Now connect the plus leads together, "splice” the meter into the charger lead will have a ridge or ridges molded along with the banded end of the zener. output cord, and use the charger output on it, and occasionally will have a white Make a hook at the end of the zener connector for the output of the meter. stripe as well. If Molex plugs are used, lead, put the pre-soldered ends of the Molex plugs, or the quick disconnect the plus lead will go to the pin on the leads in the hook, and melt them to­ plugs. 270-026, from Radio Shack, would triangular, "house roof” side of the gether. You are done, that's all there is to do fine. plug. Do the soldering by stripping a it! Use the drilling guide drawing that Now for the assembly. You will need a quarter inch of insulation off theendsof 25-watt pencil iron and rosin core the leads, then pre-solder them. Con­ Continued on page 95 solder. Start by soldering the zener diode to the center terminal of the potentiometer, with the banded end away from the potentiometer. Keep the soldering simple, just pre-solder the leads on the zener and the potentio­ meter, then hold them together and “ m elt” the connection together. This gives a good clean joint. Resist the temptation to wrap lots of turns of the lead around the pins, and so on. It makes a mess, and is hard to solder, and even harder to take apart if you need to later Solder the zener diode to the center terminal of the potentiometer with the banded side facing on. Keep it simple! Just touch them away. together, and that’s it! Now solder the potentiometer across the meter lugs, as shown in the photo. Again, pre-solder everything, then touch them together and solder. Note one lug is labeled with a plus sign, the other with a minus sign. Now solder the

The positive leads (red) are soldered together. Here we see the battery pack nearing the top of its charge. The meter reads 26 . To convert Banded end of zener soldered to them. this to actual voltage, multiply 26 times .030 and add 9-volts.

MAY 1983 47 Delta's newest 1/12-size racing car is the Super Phaser, seen here New set-and-forget charger from Delta. Just push a button to reset minus a body. Best handling 1/12 available? and when it senses 100% charge, it'll trickle charge.

By DAN RUTHERFORD R /C AUTO PHOTOS BY AUTHOR

• Why I do it, I am not sure... been a number of phone calls coming in have suggestions on exactly how to Do what? here, and most of the callers mention modify your particular car. I do know Promise in one article to cover a the Super Phaser as being the best that the folks at JoMac took a long, hard certain subject in the next. I’ve done it handling 1/12 car that they see being look at what Delta has done, and they do many times in my years of writing for raced in their area. Third, there is a have a couple of ways to modify the Model Builder . . . and still haven't wholesale change taking place in the Lightning 2000. learned. design of 1/12 cars as ail the other Along with release of the Super Phaser, So . . . I have no full-blown test of one manufacturers first figure out how the Delta has a few more things of interest, of the latest in 1/12 cars, the Delta Super Super Phaser works, and then how to the first of which is a new compound of Phaser. The road pack that I was waiting adapt their car to a similar setup. Check rubber for rear tires, the 1241 series. As for came in as a receiver only, and then it out, everybody is making changes; many of you have figured out, most of too late to bolt it all together and race it some are detail refinements, others are a the manufacturers use the same source at least a couple times. complete reversal on previously held for their rubber sheet, which they then However, I have run the car about a ideas. cut up into tires. There can be consider­ dozen times here in the cul-de-sac and it For those who don’t already know, the able variation in the rubber, as it seems is really super. It’s very smooth, turns real trick to the Super Phaser is theT-bar that the folks making the sheets can’t hit well, is easy to drive ... It seems to do used as a link between the rear pod and the exact same compound each and everything you want a 1/12 car to do, it the chassis pan. The shock looks trick, every time, which leads to speculation just does them all better than any other does an awful lot for getting the maxi­ that one manufacturer’s rubber is better car currently available. Yes, I know that mum performance from the T-bar idea, than somebody else’s. With Delta the is a fairly strong statement to make, but I and is very handy in setting the ride difference has always been that they make it for three reasons. One, I have height for the chassis pan. But the T-bar grade each and every ring of rubber so now driven the car enough to see what it is what makes the Super Phaser do its you can order the compound that you is capable of doing, and where it is better thing so well. It has also been proven to than other cars. Second, there have to work on other cars. However, I don’t Continued on page 85

Delta's self-contained starter battery for glow plugs. Meters indicate Associated's new shock absorber designed for the RC 500 suspension voltage of Ni-Cds, and condition of plug. car. Excellent design is adaptable to other brands.

48 MODEL BUILDER The author's old timer fleet rests on the slope of his backyard lawn. How many can you Playboy. Potentially the best performer. identify? Born Again Free Flight

By WILLIAM LANGENBERG . . . If you've ever wondered what all the fuss is about over the Old Timer and Nostalgia movements, read on, you'll see why they are gaining popularity and support.

THE GOLDEN AGE OF FREE FLIGHT What happened to those millions of based on a reluctance to repeat mistakes The year was 1940. Millions of young young men who were fascinated by full- made over 30 years prior. As the nos­ men in the United States were fas­ scale and model aviation around 1940? talgia craze swept the country, however, cinated with aviation and aircraft. The Some, tragically, went to war and never and dances, movies, plays, and clothes Battle of Britain was in full swing, and returned. Other, more fortunate, served reflected yearnings for the past, I suc­ Spitfire pilots were the current heroesof in the military, then came home to countless young aviation fanatics. In education, jobs and new families. The cumbed to the lure and built my first Old Timer... a Korda Wakefield. Thechoice America, the threat of war was stimulat­ remainder either were ineligible for ing new aircraft design and production, military service in World War II, or and the entire aviation industry was entered too late to see combat. As the coming out of the doldrums forced years passed and the entire group upon it by the Great Depression. matured, however, many of its members If there ever was a Golden Age of free once again became more homogeneous. flight in the United States, it probably THE GENESIS OF OLD TIME FREE FLIGHT culminated around 1940. U-control had As the young men of 1940 reached not yet developed popularity, and radio their 40’s and 50's, with relative job control was an esoteric science prac­ security and more stable family situa­ ticed only by a relatively few dedicated tions, many developed nostalgic modelers. The success of the Brown thoughts of their carefree youth. Among Juniors and other reliable engines had these pleasant memories was free flight: permitted gas models to challenge the rubber and gas powered models of their estabished rubber powered circa 1940. On such a note of nostalgia, brethen for predominance. Korda’s repeated in hundreds of cases, the Old Wakefield had won the last major inter­ Timer program was born. national contest in 1939. and Goldberg’s THE AUTHOR IS HOOKED Zipper had burst on the scene to popu­ For many years, the author resisted larize gas models seemingly overnight. Here's a pair of rubber powered models: the Old Timer movement, probably THE WAR INTERVENES Lamb's Climber and Korda's Wakefield.

Without reading the following identifications, how many of these .020 replicas do you recog­ nize? . . . They are (left to right): Stratostreak, Playboy. Ranger, Brooklin Dodger. MAY 1983 49 St rat ost rea k. Probably the most consistent winner. Brooklin Dodger. The author's favorite. was a good one, as the model was simple Neither possessing nor being interested events with Replica .02 Power. Engines to build, readily available, and almost in acquiring any ignition engines. I and kits are readily available, and the universally recognized on the flying opted to expand my Old Timer fleet into models are cheap and practically in­ field. In addition, it was not difficult to the Replica .02 Power category. destructible. The Stratostreak is prob­ improve upon my original model of this This decision proved fortunate for ably the biggest winner in this class, type, completed without assistance several reasons: Cox .02 engines are although the Playboy is also very compe­ before I reached my teens. The fact that powerful and readily available; there are titive. I personally favor the Brooklyn Korda's Wakefield is currently uncom­ several .02 kits on the market of well- Dodger, as it is distinctive, stable, and petitive is the only disappointment known designs; the models are simple competitive with a hot engine. experienced with it to date. and quick to build; they are small and 4. SAM rules state that, “ All changes Because Korda's model was disap­ easily transportable; and the completed must be in the character of the original pointing in terms of performance, I models are light and relatively durable. m odel. . . beef up the built-ups!” As the chose to build a second, more compe­ SUGGESTIONS FOR NEW Replica .020 Power models are particu­ titive rubber ship. As I had also built Ed OLD TIMER PARTICIPANTS larly susceptible to warps, I strongly urge Lamb's Climber as a youth, I produced As indicated in the accompanying they be strengthened by cross bracing, the plans and completed it the following photographs, my Old Timer fleet now additional ribs, etc. See the photographs year. There is no question, based on my numbers six models, built at my usual for details. experience, that the Climber is an snail’s pace of one per year. As there 5. The preamble to -the SAM rule attractive and strong compeitor. It may be other circa 1940 modelers who book states that competition flying of climbs rapidly to impressive heights, and are attracted by the photographs and Old Timer models," , . . is intended to be glides well in thermals. In dead air or may be reading this article, I offer the casual, enjoyable, and interesting for down drafts, however, my Climber following suggestions, to be used or both competitor and spectator alike.” I glides like a brick. There seems to be no discarded as you see fit: suggest that precept be kept in mind question that the higher aspect ratios, 1. Join the Society of Antique constantly when building, flying, and thinner airfoils, and longer moment Modelers (SAM). They publish an offi­ competing with Old Timer models. arms developed in rubber models since cial rule book and need your support. My experience with Old Timer models the 1939-1941 era have significantly 2. Old Timer rubber cabin and stick over the past nine years has been rich in improved their dead air performance. classes are frequently combined at nostalgia. It is good for the aging ego to THE FLEET EXPANDS contests. Accordingly, if you opt to build demonstrate that you can do at least one As existing Old Timer rules provide only one rubber ship of the most com­ thing better at 45-55 than you did as a for only two classes of rubber models, petitive type, Lanzo’s big stick model is youth of 7-17, i.e., build and fly an Old cabin and stick, there seemed no need probably the best selection. Timer. to augment my fleet in these categories. 3. Start your participation in gas Try it! You can boost your ego to o .·

Korda's Wakefield. Most recognized at the flying site. Ed Lamb's Climber. Climbs like a rocket, glides like a brick.

50 MODEL BUILDER

use very light 1/32 sq. WING Use medium hard balsa for the lead­ ZLÍN 526 AS ing edge. Lay out the leading edge, trailing edge, and the wing tips, then install the ribs. Glue in the 1/16 sheet saddles for the landing gear. Next, cut the dihedral breaks, and prop up the AKROBAT wing tips 7/8 of an inch. Then install the corner braces, and main spars. By STEPHEN HALES . . . This month's Peanut takes us back 14 years Bend the landing gear wire to shape to 1969 and the World Aerobatic Championships where the Akrobat using 1/32 wire. Install the landing gear flew as the Czechoslovakian contender. wire in the saddles, and glue securely. Carve the wheels out of balsa, and insert 1/32 aluminum tube bearings. The tail wheel is a 1/16 sheet disk glued to a straight pin. For covering material use good, Jap­ anese tissue from Peck-Polymers or Sig to cover your model. My tissue was put on with white glue, then shrunk with rubbing alcohol. FINISHING On my model, I sprayed a very thin coat of white paint on the entire air­ plane. The trim and yellow base colors were done with ballpoint and felt pens using a straightedge. The registration numbers were cut out of black tissue and doped on. The word "A krobat” and the “ Z 526 AS” were done freehand with a fine felt-tipped pen. FINAL ASSEMBLY Install a 1/16 aluminum tube, or a Peck-Polymers thrust button, in the nose block. Be sure to include the two degrees of downthrust. Use a 3-1/2-inch • The Zlin 526 AS was built specially for First, pin down the plan, then cover it prop; mine is from a North Pacific the Czechoslovakian aerobatic team. It with waxed paper. Build one side over Skeeter. The spinner is carved from was used to com pete in the W orld the cross-hatched areas. Use stock of balsa, fitted to the prop, and painted Aerobatic Championships, and as of equal firmness for the longerons. When white. Drill the 3/32 hole for the rear 1969. the Zlin was considered the top this side is dry, cover it with plastic wrap, rubber peg. Use a 3/32 aluminum tube aerobatic airplane in the world. There then build the second side directly over or a wooden dowel for the peg. Carve a were five planes made; the factory the first. Separate the two sides carefully plug for the canopy, and stretch form or num bers went from OK-W XA 1026 when dry. vacuum form the canopy out of .007 through OK-WXE 1030. They all had the Glue the tailposts together and use butyrate sheet. Install the main, and tail same trim colors, white with red and the top view for finding the cross-brace wheels. black, but the base colors were all lengths. Add the bulkheads and string­ FLYING different. OK-WXE had yellow as its base ers, then sheet the nose from A to B First, balance the model at 1/3 the color; this is the plane I chose to model. with 1/64 or 1/32 sheet balsa. Carve the wing cord. Install a loop of 1/16 rubber BUILDING THE MODEL nose piece to shape from a block of 5/16 12 inches long; put about 100 turns in Carefully select the wood to be used. medium hard balsa. Fill in the bottom of the prop, and test fly for proper flight You w on’t need any wood that is over six the fuselage from G to the tailpost with trim. Increase the number of turns a pounds per cubic foot density. My light 1/16 sheet. little at a time until you reach a max of model weighed eight grams without TAIL SURFACES eight or nine-hundred turns. rubber. Build the fin and stab out of 1/20 I hope you have as much fun with your FUSELAGE square balsa. If you don't have 1/20 sq.. Zlin as I have. Good flying. ·

The Zlin 526 AS Akrobat Peanut model pictured here is yellow with red and black trim. The author's method of obtaining the yellow base color is to give the model a light coat of white paint followed by a coat of yellow felt pen ink. MAY 1983 55 56 MODEL BUILDER Y q s q . h a r d l . e .

77Γ SHT. WING

ZLÍN 526 AS. PEANUT SCALE BY! STEPHEN J HALES REF. DEC. 69 M.A.N. 10/8/81

MAY 1983 57 Bill Noonan inspects his Fokker Universal rubber powered scale biggie after a successful flight. Bill is quite a gifted builder and flier. FREE FLIGHT SCALE By FERNANDO RAMOS Or. Harris prepares to launch his CO2 powered Fokker DR.1 Triplane. • Happy New Year! At this time (early When I had wound the model for the amount of thrust used for the required January) it seems appropriate to start off first time, another forgotten bit of power. Balance point is also important. this month's column this way, however, necessary information hit me between If you have removed a blob of clay or by the time you read this we'll be deep the eyes. What about the thrqst? I use other ballast from the nose or tail of your into the new year. I hope 1983 will be adjustable thrust from ends, and the model so that it wouldn't look bad everything you desire, and that there locating marks I had previously made hanging up, are you going to remember will be ample time for our great hobby! had worn off. Needless to say, this first how much clay or ballast was removed My time schedule doesn't always flight was a bit on the hairy side. What's on that fateful day when you go to fly it? permit me the opportunity lo go out the point of all this? Simply that a What about the flying surfaces? Were model flying as frequently as I would complete record should be kept on all of they deliberately tweaked, or is that a like. The other day I readied four models your flyable models. I say flyable. be­ I had hanging in my barn. It had been cause even though you may presently many months since any of these models feel that you have had enough flying out had flown. What I’m about to say is in the of some ole bird, you may, at a later time, form of a suggestion, so you will not find change your mind. Then you’ll be in the yourself in my siluation. On the rubber same boat that I was in the other day. models, I had forgotten what amount of For a rubber model, I would record power I had previously used. Prop size the following information: size and and pitch on the power models were length of the motor, how many winds also forgotten, etc. were used on an average, and the

George James is obviously pleased w ith his Walt Mooney prepares to launch his mono­ Bill Krecek holds the prop of his sport rubber Cessna C R-3 racer. plane crop duster. model "Baby Duration."

58 m o d e l BUILDER Would you believe this Grumman Wildcat of Dr. Harris' is covered Model Builder columnist Ken Johnson lets go of his Lockspeiser with Kleenex tissue? LDA-01 jumbo rubber powered scale ship. Excellent flier. warp? What about the prop? If you are ever I change to a different brand, there Another consideration might be the fuel like me, sometimes it is easier to steal a is a substantial difference in perfor­ used: sometimes an engine needs a prop from another model than to carve a mance. I always make adjustable flying hotter fuel to propel themodel properly. new one. Did the model you hung up surfaces (for more realism as well as for If the correct fuel is not used again, it use a wooden or a plastic prop? What trim changes), and these are usually could result in an unwanted crash. diameter was it? Do you get the picture? glued in place after establishing the You may remember that the model Write this information on a 3 x 5 file card, correct flight characteristics. However, ROGs beautifully, but does it take off and keep it in a file box. they can get bumped, leaving the model while going directly into the wind, or do With a power model, particularly with either too much or too little adjust­ you have to launch it with a quartering diesel or glow, the following should be ment. Naturally, this can lead to the wind? Maybe one tire has to havea bit of considered: prop diameter, pitch, and quick demise of a favorite model. There­ drag, in order to prevent ground-loop­ make. I have an abundance of good, fore, record exactly how these surfaces ing. All of these are important items to wood Tornado propellers, and when­ were set when the model was last flown. remember, yet so easily forgotten. Write them down. METHOD 1: GEORGE JAMES I remember, at the ’63 Nats in Los Alamitos, California, that the famous, grand old scale modeler, C.O. Wright Continued on page 68

F IG . 1 D IA G O N A L INSET THICKNESS -SHADED AREA REPRESENTS OF BULKHEAD B R AC ES y . BULKHEADS ETC. NN P R O F IL E 2nd STEP -THEN TOP & BOTTOM KEEL STRINGERS ADDED, FOILED BY OTHER STRINGERS.

F IG . 2 METHOD 2 : GEORGE JAMES

SPACER STICK NOT GLUED IN! PLAN V IE W H A L F

F IG . 4

F IG . 5 ✓ v STEP 1

TEMPORARY F IG . 3 YY XV a y x> <\\ XV /// 2 STEP - PROFILE BUILT SIMILARLY TO PLAN VIEW, THRUSTLINE / w J / .7 SHOULD BE MARKED FOR THE / \ v \ LOCATION OF SIDE PIECES FROM STEP 1. 1/16" SHT. \ '- X 7 \ S A N D TO X / SHAPE THEN LEFT SIDE GLUED AT RT. ANGLES TO ADD STRINGERS PROFILE, RIGHT SIDE SAME. & OTHER DETAILS

MAY 1983 59 Moment of release. Harry G riffin launches his latest creation, a twin pusher canard complete withFREE . .. a mallard's head? FLIGHT By BOB STALICK Avery Clark launches his K&B .21 powered Hutchinson Zingo . .. built from the R.M. Models kit. Hutchinson photo at Harts Lake.

• It's that time of year again. The winter Plecan, ex-Model Builder staffer, did the was arrived at by much thought, theory, indoor season is winding down (pun plans. It was the earliest model design calculation, and mainly by the size of the intended), and the outdoor season is I’ve run into that had a timer-actuated only straight dust mop handle I could looking up. For me, it’s time to pul away stabilizer with a different setting for find in the garage. Original airframe the microlite and .045 rubber and get power and glide . . . the “ first” VIT weight of 57 grams was surprising as no going with the Rossi-powered FAI ships. system. It also featured a spring loaded effort was made to use light balsa, only What a great hobby! Build and fly all retracting landing gear. So, for-those of what I had on hand. The name Throw­ year long. Lately, I seem to be doing you who saved your old issues of Me­ away was used as I didn’t bother with a more talking about building and flying, chanix Illustrated from the early ’50s, DT, as it took only six hours to build and I than actual building and flying. So, let’s you might try to locate the name of this figured, ’What the heck, it probably get on with this m onth’s talk about the mystery ship. If you find the name, drop won’t fly anyway.’ First flights were F/F scene. a line to the editor of Model Builder . . . made at one of our monthly Coupe and MYSTERY MODEL FOR MAY first in line gets a prize. And thanks to P-30 competitions. One short test flight For years this feature has been a Charles Cortwright for the lead. was followed by an official flight at 50 mainstay of the column. Just about when THREE VIEW FOR MAY: percent turns, in dead calm, foggy air I thought I had exhausted my supply of Throwaway P-30, by Bill Giffen (100-yard visibility), and yielded 65 unusual-looking, semi-vintage aircraft, P-30 is one of the few events that I seconds. It went on to win over two along comes a letter from Charles haven’t gotten involved in. However, I other coupes and another P-30, with a Cortwright with the enclosed feature know that the folks who fly it, love it. Bill five-flight total of 478 seconds. Needless model of the month (mystery style). Giffen, of the Canada Giffens, is one of to say, it now has a DT installed.” This one, published in M echanix them. He says, about the Throwaway, Bill didn't say so in his letter to me, but Illustrated, was an Atwood ignition, .60- "It’s my first attempt at P-30 and rolled I know that the Throwaway is equipped powered, six-foot wingspan ship. Paul tube fuselage. The rather small diameter with the standard. 9-1/2-inch plastic

Here's a closer look at Harry G riffin's indoor canard. Harry is securing . . . And just in case you had any doubts about the mallard's the left motor to the hook . .. flying abilities, this should put 'em to rest!

60 MODEL BUILDER BIC RAZOR BLADE HOT STUFFED BETWEEN THE TWO BALSA SHEETS

SIZE OF THE WOOD STRIP YOU WANT TO C U T ...... 1/8", 3/32" etc. prop (as required in the rules). He also flies the ship with one loop of rubber, so the power burst may be a bit puny, but I’ll bet the motor run goes on, and on, and on. For all of you airfoil freaks who read this column, please note that Bill uses the ubiquitous Adidas 9A a irfo il. . . coordinates unavailable, but if you’ve got the right size running shoe, trace around the outside edgeof thesole,and you’re close enough for this event. DARNED GOOD AIRFOIL .. . NACA 4406 More from the NACA stable . . . this m onth the 4406. The w ord on this section comes from an early article on airfoils from Gerald Ritz, who suggested that this was the section for FAI power, combining both controllability in the climb with speed and a better-than- average glide. At the time that Ritz’s article was written (early '60s), Bob Sifleet was using this section on his power models. Streamlined models, such as those in use today, especially with the power available, should benefit from using this month’s DGA. It’s just a thinner version of Rocca’s section from his World Champ’s FAI ship. For those who don’t like undercamber, try it flat- bottomed. A POTPOURRI OF INDOOR ODDS AND ENDS Tony Italiano announces the Second United States Indoor Championships at West Baden, Indiana. The dates are june 12,13,14,15. Fourteen events are on the schedule, and the location is rapidly becoming a legend in indoor F/F circles. The event is sponsored by the NFFS and NIMAS. Tony says that a full practice day is scheduled for June 11. Want more info? Drop Tony a line at 1655 Revere Dr., Brookfield. Wl 53005. ★ ★ ★ Dave Linstrum sends along informa­ Dick Williamson readies his RamRod 250 for an official flight at a WMC meet. This ship is a tion that the MIAMA club is sponsoring hot performer in Nostalgia circles. Hutchinson photo.

MAY 1983 61 3 -1 /4 " BY: BILL GIFFEN CALM AIR DESIGN 1 -3 /4 " TRIM = 3° DOWN - 2U RT. THRUST - RT.-RT. PATTERN COVERING = JAPANESE TISSUE - SPIRAL ON FUSELAGE WEIGHT = 57 GRAMSPOWER = 1 LOOP FAI RUBBER - lOgm. 1200 TURNS V DIHEDRAL WING = 2-3/4" EA. TIP 3 " FUSELAGE = 1/16" SHT. TUBE 3/4" DIA. 1/16"x 1-1/2"x 1/2" PLATFORM \ Throwaway Throwaway P-30 by Gift \ / 2 8 .5 " \ * / 17" \ ------/ ----- 1 /1 6 " SHT. ALL A lRFOILS = ADIDAS no.9 \ / c/g = 80% ===p°- 4 - * =□- 3 0 -1 /4 " FUSE FOR D.T. * / \ PYLONS - 1/8" SHT. = 4-1/2"x 3/4"x 1/2" 10" 1/16"x 1/8" / 1 /1 6 " SQ. 1 .5 " 1 /1 6 " SQ. \ 1 /8 " SQ. ------Έ 1/64" PLY NOSE PEG REINFORCEMENT X j 1/8"x 1/16" D IA G O N A L S WING & STAB. ro σ> MODEL BUILDER Harry Griffen’s technical center for indoor flying . . . the ultimate scientific approach to Magnetic sensor/switch inside winder tells winding rubber .. . H.P. calculator counts winds, torque meter measures torque. H.P. to: "add one . .. add one ..." etc. a one-design event at their 1983 con­ mallard’s head nose on the ship . . . it end that is facing the slant of the blade. tests. The design is Tom Hutchinson's flies, too! Over two minutes at its first- Remember to keep your fingers clear of “ 5

Dick Williamson's RamRod gets airborne. The lid of Jim Thurmond s indoor flight box has "all the right stuff" on it! Care to guesstimate Hutchinson photo. the ratio of weight between the models and the box?

MAY 1983 63 showed its ability to be tumbled, both Span: 5 0 ” Area: 425 sq. in. forward and backward under perfect Weight: 50 oz. all up control, at air shows near Seattle, Wash­ ALPHA 1 Engine: .1 5 to .25 RC ington. Functions: 3 or 4 channels The final portion of the publication is devoted to vortex motion and its appli­ The A lpha 15 is a s tu rd y , easy cation to aircraft, dealing with delta build, rock stable trainer/sport wings, increasing lift, controlling tip plane for 3 or 4 channel control and a .15 to .25 engine. Plenty vortexes for drag reduction, etc. We of power for loops and rolls. It found the book most interesting, and doesn't have any bad r:pin or snap roll tendencies and has excellent suggest that many of its ideas might slow flight characteristics. prove useful in the solution of model as Plywood fuselage and built up well as full-scale aircraft problems. wing construction is featured for sturdiness and durability. Priced at $10, The Kasper Wing may be ordered either from the Meheen Corp., Send $2.00 for our 100 7550 W. Yale Ave., Suite 220, Denver, CO page catalog. For all 80227, or directly from Witold Kasper, direct orders add $1.00 fÄCi l/t. Inc. handling fee. 1853 132 SE, Bellevue, WA 98005. Please Box 511D, Higginsville, Mo. 64037 (816) 584-7121 say MB sent you! MENTIONS IN PASSING 63 3/8" Span 1 '2 Scale .60 Engine T6, SNJ, Harvard 8 ' 1 -9 lbs.—Ready to Fly While visiting the book shelves, we note that cartoonist and aviation safety This model has been molded in poster designer Robert Osborn, who rigid eurathane foam with a recently produced a book Osborne on white epoxy jell coat surface Osborne, lists his wife, Mozart, model that picks up a great amount of planes, and fresh green figs as some of detail. Fuselage, rings, aileron, his favorite things! fin, rudder, stabilizer, elevator, A new Readers’ Digest book The f t cowl molded and ready for Unexplained, dealing with assorted assembly. installation of mysterious phenomenon, might have equipment and painting. All entirely escaped our notice, except for hardware, including scale wheels and struts. Many extras. one advertising caption which asked: "Who made the 2,000-year-old model Suggested List: $285 aeroplane?” Factory Direct: $228 KEN JOHNSON ON TV Send SASE for brochure Contributing Editor Ken Johnson was P O Box 308. Tawas City. M l 48763 featured on ABC television's "Ripley’s Great Lakes Model & Mold Co. (517)362 6078 Believe It Or Not,” flying his scale model idea. Worth a try on your local Xerox. However, I'm back for the duration Whitehead No. 21 monoplane. Regular HUMOR FROM MURPH (until Bill gets tired of me). In addition, readers will recall that this machine, one The “ CIA Informer," edited by Harry you have just reached the end of my of three that Ken has constructed, Murphy, is one of the best two or three May column. Cheers and thermals. · appeared as an article in the July 1982 newsletters about free flight that exists Model Builder. today. Not only is it chatty and informa­ The TV sequence concerned various tive, but it is also humorous. Some Hannan...... Continued from page 54 aircraft thought to have flown prior to recent examples: the Wright brothers' Flyer. Host Jack "Murphy's Law of M odel Designs:.. . Palance held, while Ken wound the Your buddies always think your designs The author holds degrees in both me­ rubber-driven model’s twin power look like someone else's. chanical and aeronautical engineering, units, and the cameraman did a com­ "Corollary to M urphy’s Law o f Model has served as a fighter pilot, and has mendable job of following the craft in Designs: All great designs are created by design experience spanning more than flight at close range. This remarkable accident. .. and destroyed by the same four decades. His projects have included model was also flown repeatedly during method. gliders, powered gliders, and ultralights. a recent Flightmaster contest at Mile "By the Numbers: Names of engines He has worked with manufacturers in Square Park, and we can vouch for its have always intrigued me. Recently, I Rumania, Canada (Canadair), and the clever construction and outstanding got to thinking of neat names, such as: United States (Boeing). flying abilities. Heinz .57; a Cutlass .442; Rocket .88; and It is Kasper’s contention that in spite of HISTORY BY CONTRACT for giant scale. The,Rocket .98. Then some 75 years of progress since the Which leads us, fittingly, into our final there is Catch .22, Sweet .16, or a neat Wright brothers left the ground, aircraft book review this month. H istory by one for a diminutive 002 engine would still fall short of the standards of maneu- C o n tra c t, authored by William J. be the Agent .007. How about thinking verability, safety, and slow landing O’Dwyer and Stella Randolph. Miss up some of your own. Maybe we should characteristics of the bird, and we Randolph had written Lost Flights of have a contest. How about the Roarin’ savored his remark: "birds seldom stall.” Gustave Whitehead during 1937, and .20? Then there was my masterpiece ... He also feels that the flying wing con­ later wrote Before the Wrights Flew. a sexy little number for sport flying, figuration represents the best approach During the 1960s, O ’Dwyer joined her in complete with a pink anodized head. I toward achieving such goals. an extensive search for additional in­ called it the Bo Derek .10." Having carefully studied the work of formation about Whitehead and his Hey, Murph. did you consider the the world’s best-known designers, Kas­ aeronautical activities, an odyssey which Dolly .44 (it’s a D class, so I’m told). per concludes that they all were lacking continues today. The fruits of their THE END in positive control at low speeds. His combined labors asof 1978, are collected For those who have stuck with me this points are clearly explained in easy-to- in History by Contract, which was pub­ far, and who have contacted me regard­ understand language, supported by lished in Germany, in a beautifully ing the whereabouts of the February explicit illustrations. produced volume. column, let metelí you that I gave up the To conclusively demonstrate his theo­ The book’s title reflects its authors’ space so that Bill could use the excellent ries in actual practice, Kasper con­ conclusions that the Smithsonian Insti­ article by Simpson about the FAI big-do. structed his full-size BKB-1 glider which tution has ignored or suppressed in-

64 MODEL BUILDER Ě e \ ^ \ ( Q ) Y MODELING’S ONLY ALL AMERICAN INSTANT GLUES BAR NONE! THAT’S RIGHT. FROM THE VERY BEGINNING OF THE “ HOT STUFF» REVOLUTION. IN 1971, “ HOT STUFF» PRODUCTS HAVE BEEN TOTALLY AMERICAN. C t ø CONTINUES THIS POLICY WITH THE INTRODUCTION OF “ HOT TIPS» OUR EXCLUSIVE NEW APPLICATOR TOP. “HOT TIPS”. DESIGNED BY MODELERS FOR MODELERS —EXCLUSIVE FEATURES— 1. FINEST TIP 6 Gives you best control for each application 2. LONGEST SPOUT For those hard-to-get-at jobs 3. EXCELLENT DRAINAGE Helps keep the clogs away 4. RETRACTING CAP One twist keeps cap far away from tip 5. DRIP GUARD Helps keep excess glue away from fingers 6. BUILT-IN TUBING HOLDER FOR 12 YEARS Tubing supplied to use if you wish MODEL BU ILD IN G ’S (1 /2 oz. & 2 oz. only) STATE OF THE ART „S3 INSTANT GLUES HST-1 'h OZ. 2.95 3 OZ. 3.95 “ HOT SHOT” HS-1 Vi OZ. HS-4 ECONOMY 2.95 HST-4 ECONOMY 2 OZ. 9.95 2 OZ. 9.95

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MAY 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 65 Herr H. Majer Eliminates GLITCH problems associated with long servo leads. Achtung M. Lechner Fritz Majier & Sohn, Verlag Eliminates need for voltage robbing chokes and other devices with leads over 15" long Industriestrasse 3 Æ m , D-8801 Leutershausen Modern CMOS IC technology West Germany Uses less than 0.5 milliamps at 4.8 volts The price is $25 and delivery may STOP Power lines are capacitor filtered require about five weeks. Available in 4 versions with connector installed; Single Channel, single servo drive (Single) GS- UNITED STATES Single Channel, two servo drive (Wye) GS-1Y INDOOR CHAMPIONSHIPS $14.95 - Two Channel, two independent servo drive (Twin) GS-2 A.J. Italiano, 1655 Revere Dr., Brook­ $17.95 - Two Channel, two servos per channel drive (Twin Wye) GS-2Y EMS field, Wl 53005, now has entry forms • Overall lead length is approximately 6" to 8" ready for the 2nd U.S. Indoor Cham­ 1 * · Modeler must furnish own longer extensions as required______pionships, to be conducted June 12 S o ecifv R adio S I.00 Shipping and Handling on Pre-Paid orders, add through 15 at the Northwood Institute, M ” 6% for California residents. Mastercharge and Visa. West Baden, Indiana. This may be the 6175 PALO ALTO DR.. ANAHEIM, CALIF. 92807 (714) 637-2161 last opportunity to fly models in this historic facility, which is soon to be sold. Categories offered include: Hand NO TIME TO BUILD? Launch Gilder, Paper and Stick, ROG TRY OUR OLD TIME" F/F-R/C AIRCRAFT Cabin, F1D microfilm, Easy B, Penny- FULLY ASSEMBLED COMPONENTS plane, Novice Pennyplane, Manhattan, Bostonian, Indoor Stick, Peanut Scale, AMA Scale, Peanut Speed, and Un­ limited Speed. A new event, “ Kit-Plan Scale” will also be offered. Rules and registration information may be ob­ tained by sending a stamped, pre­ addressed envelope to A.J. FINAL VISION IDEAL FOR BEGINNERS & EXPERTS 72” Span - 29 to 40 Eng.no Si*e (Los* Wheels) According to the late Jack Northrop’s 2-3 Channel Operation, or F/F Quality Built Components ol Balsa. Spruce & Ply son, who spoke during the 40th anniver­ Formed Spring Steel Landing Gear/Τβιΐ Wheel Assembly sary of Northrop University, in his final FULLY FRAMED - UNCOVERED $149.95 A

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

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surface any more than he has to. His From time to time our memories have to be refreshed, and as long as I've F/F Scale . . . . Continued from page 59 preferred method of building models involves holding the work in his hands. mentioned George’s latest way of build­ Instead of using one of my type of ing a fuselage, let me tell you about was flying his beautiful .049 powered fixtures, he lays out a structure using the another one of his building techniques Antoinette. Most likely, the model had plan view (top view) of the fuselage (see which I covered about a year or so ago. not flown since the previous Nats, but he Figure 1). The cross-members are placed This other method eliminates having to had a file card that had all the necessary just ahead of the bulkhead location, know how to loft fuselage cross-sections data on that model. He fired up the except at the front. This cross-member ... that’s for me! (See Figure 2.) engine, adjusted the rpm with a tach should be placed just behind the bulk­ You start by building a crutch of the according to his record, took a few steps, head. When this structure has dried, it is plan view (top view) of the fuselage. The and launched the antique airplane for then removed from the workbench, and two longerons are pinned down first. an outstanding ROG and flight. There the bulkheads are then glued immedi­ (Let's say, for the sake of discussion, that was no horsing around here. He knew ately behind each cross-member,except the material used here is 1/16 square his model, ana the data he had written the front one which is glued in front. The balsa.) Next, directly over the center down provided him with the necessary use of Hot Stuff Super 'Τ’ will speed this line, place another 1/16 square stick. information required for a winning process along. The top and bottom Using fine pins (dissection pins are great flight. I guess the bottom line here is stringers (one of which would normally for this), pin right through this stick to organization! Life seems to be more be the keel) are next to be glued onto hold it down. This is followed by placing exciting without it, b’ut certainly there the structure. Care should be taken to another 1/16 square stick on either side are more headaches. So, you too can fly see that they are aligned perfectly of this center stick. The cross-members with fewer headaches with a bit of straight. The following step is to add the are cut and glued into place everywhere organization. remainder of the stringers, alternating there is a bulkhead location. These George James strikes again! The other from one side to the other, so that a cross-members are perpendicular to day, I had a chance to visit George at banana shaped fuselage will not occur. the sticks that are on either side of the home, and to see his most interesting This whole operation is done in your center stick. The center stick is only a workshop. Like most of us, he has a hands, and in a sense, you can keep the spacer. zillion projects underway, each one a bit stringers aligned very easily, as rotating If you draw like I do, one side of the more interesting than the one before as the fuselage about and sighting down its plan view might not be exactly the same different techniques and ideas flourish. length are possible. as the other. If this is the case, just build I’ve talked about my method of building If the bulkheads do not fair with one one-half of the plan view, and when this multi-stringered fuselages on a fixture another by sighting down the structure, dries, build another half directly on top many times in the past. George, who carefully sand them with a long sanding of the first one. While those structures likes to work in the third dimension, so block. By doing it this way, a smooth are drying, proceed to the next step. to speak, has come up w ith a new flowing fuselage is possible. George The side view of the airplane is framed wrinkle to my jig method. In other finds this to be the quickest and easiest similarly to the plan view, however, words, George doesn't like to pin things way of building fuselages with com­ there are no sticks running down the down on a board and work on a flat pound curves. center. The vertical members are also 68 MODEL BUILDER Peter West burg’s SCALE VIEWS

SUPER-ACCURATE AIRCRAFT DRAWINGS. USE FOR SCALE DOCUMENTATION AND/OR FOR DEVELOPING MODEL CONSTRUCTION PLANS. ALL DRAWINGS ARE 28 X 40 INCHES BORDER- TO-BORDER, AND ARE SCALED AS LISTED BELOW.

1/24th scale: %" = 1 ft. Shts $ Czech Avia B-534 2 8 Waco ATO Taperwing 2 8 Douglas 0-35/B-7 1 4 Davis D-1K 2 8 Douglas XO-36-XB-7 1 4 Douglas 0-25C 3 12 1/10 scale: 1.2" 1ft. Shts S Douglas 0-31A/0-31B 3 12 Berliner/Joyce P-16 4 16 1 /12th scale: 1" = 1 ft. Douglas 0-38/0-38B 2 8 Curtiss BFC-2 Goshawk 4 16 Boeing F4B-4/-3 4 16 Douglas 0-43A 3 12 Curtiss F9C-2 Sparrowhawk 4 16 Boeing P-12E 3 12 Douglas 0-31C/Y10-43 3 12 Curtiss P-6E Hawk 4 16 Curtiss A-8 Shrike 3 12 Douglas 0-46A 3 12 Fiat CR-32 3 12 Curtiss Guifhawk IA 2 8 Fokker D-17 3 12 Great Lakes Trainer 4 16 Curtiss N2C-2 Fledgling 4 16 General Western Meteor 1 4 Hawker Fury Mk I 4 16 Curtiss 0-1B/A-3 Falcon 3 12 Grumman F2F-1 3 12 Hawker High Speed Fury 3 12 Curtiss P-1B Hawk 3 12 Grumman F3F-2 3 12 Hawker Persian Fury 3 12 Curtiss XP/YP-23 3 12 Stearman 4E Mailplane 2 8 Monocoupe 90A 2 8 Curtiss SBC-4 Helldiver 4 16 Travel Air 2000 2 8 Swedish Sparmann P-1 2 8

ORDERING INSTRUCTIONS Price includes 3rd or 4th Class mail. For Airmail or ders. Master Card or Visa orders add 5%, include card First Class in U.S., add 25% of total order. For Over­ number, expiration date, and signature. Send pay­ seas Airmail (includes Canada and Mexico), add 50% ment to MODEL BUILDER, P.O. Box 10335, Costa of total order. Remit by International Money Order Mesa, CA 92627. or U.S. funds drawn on a U.S. bank for overseas or­ Minumum order, $4.00 CALIFORNIA RESIDENTS ADD 6% SALES TAX

MAY 1983 69 Scale...... Continued from page 37 C.A.R 21 f o r F.A.I. COMPETITIVE AIRFRAMES FOR THE PATTERN event. I honestly can’t see this happen­ ENTHUSIASTS IS OUR BUSINESS. ing. The almost unbelievable improve­ Also We now offer a very scale-like C.A.P. 21, designed specif­ ment in the quality of Sport Scale entries ically for the new F.A.I. ‘'Turnaround” pattern. Here are over the last few years certainly reveals TIPO 750 the design specs: that modelers do wish to create a first WING - 925 sq. in., 80 in, span. STAB - 239 sq. in., 29 in. class machine. span. Construction - Solid foam & balsa. FUSELAGE - HIPPO TIPO Balsa/ply/foam. epoxy laminated. Epoxy cowl & wheel- At any rate, this team selection event pants. Recommended engine - OS Gear Reduction. (No ought to be a real horse race. I have FORMULA 750 ‘chainsaws' please!) Recommended finish - Monokote received inquiries from a number of (except wheelpants & cowl). Flying Weight - ± 9 lbs. people already indicating that they Built by Although performance is the real design criteria, the model intend to compete. There will be a form doubles as an excellent Stand-Off 1/4-scale bird. available from AM A to register for this DICK HANSON MODELS Please w rite o r call fo r prices and availability. event. Preregistration will be required. 5269 LUCKY CLOVER LANE The $50 fee will be split evenly between M URRAY, UTAH 84107 Phone: (801) 261 1402 costs incurred for the event, and for the 1984 team fund. You will be required to have the $5 FAI stamp on your AMA license. The FAI specifications for models SCALE DOCUMENTATION "ANOTHER GREAT WINDER" can be found in the FAI section of your DRAWINGS-PL A NS -PHOTOS -BOOK S IMPROVED AMA rulebook. In addition to the INTRODUCING SMOOTHER changes listed at the end of this column, & you need to be aware of the fact that f f íý 7 ^ AIRCRAFT Lilt - $64.95 engine displacement for four-stroke ( ( f Í s e m e s SCALE DRAWINGS Plus shipping engines has been doubled beyond that SCALE DOCUMENTATION AT ITS FINEST $ which is allowable for two-strokes. For ■ EARLY BIROS instance, you may use 1.20 ci as a four- IWWI stroke. Other weight and loading re­ ■ GOLDEN AGE JOHN MORRILLS "SIDEWINDER" ■ WWII quirements are as listed. We will make ■ POST WAR every effort to answer your questions ■ MODERN Precision Built Heavy Duty Winder! Turn Counter kit- $18.00 about the FAI rules. 1983 AIRPLANE CATALOG $ 2 .6 0 $1.00 FOR CATALOG Watch for the sale of a special “ Paris 7 REPLA-TECH '84” commemorative patch coming in D 3 3 / JIM CROCKET REPLICAS early spring. •m m a bo ~ ' INTERNATIONAL \ V / 4B5QO MC KEIMZIE HWY. P.0 BOX 12600 VIDA. OREGON 97488 FRESNO. CA 93778 OTHER THOUGHTS In 1977 when NASA was formed, I was elected to the position of president. I placed in the same location as the bulk­ have to be placed into notches. There­ really wish that in the time since then I heads, and are perpendicular to the fore, at this time you must decide the could point to a long record of achieve­ thrust line of the fuselage (see Figure 3). stringer spacing, and notch accordingly. ment for that group. I am afraid that we While this structure is pinned down, After only a few stringers have been are not that outstanding in any shape or take the left half of the plan view glued in place, take either a really sharp form. I offer no excuses for this other structure and glue it at right angles onto pair of pointed scissors, or a pair of small than the fact that early on in its life we the side view structure exactly on the side cutters, and snip out the now excess encountered some rather serious com­ thrust line. Use a right triangle to prop it internal structure. Add a noseblock, munications problems within our struc­ up until dry. Glue diagonal sticks from wheels, canopy, or whatever else may be ture. These made it very difficult to sell the top longeron to the side longeron, required. Guaranteed, this type of the group to prospective members. In and from the side longeron to the lower construction will save you lotsof time! · the last two years, I have been very longeron (see Figure 4). Do this all the proud of the manner in which NASA has way down the line. When dry, remove conducted scale at the Nats. It would from the workboard, and repeat the appear that we have provided a friendly, same thing on the other side. At this NFFS MEMBERSHIP AND RENEWAL APPLICATION relaxed, competitive atmosphere. M ail to: point you will have an odd looking Make check» payable NFFS Recently, I was elected AMA District diamond-shaped fuselage, but not for to the 707 2nd Street National Free Flight Society VI Vice President. This post requires a long. Davis. CA 95616 considerable amount of time, and I feel Take a look at Figure 5. You are going Subscription rates include annual fee of $.50 for membership in the National Free Flight Society The balance of the fee m that it is important that I not try to serve to need several lengths of balsa sheet cut each category is for Subscription to FREE FLIGHT, the NFFS in both capacities. In addition, I feel that into strips that will be wide enough to Digest Subscriptions are not available without membership MEMBERSHIP FEES AMO SUBSCRIPTION RATES (t and 2 yr) it is also important that we infuse new give the proper contour at a given blood into the leadership of the organi­ location. These strips are glued to each 1 yr f t $00 ($50 mwntwrahip fee plus $1« SO subscription) zation. By the time that you read this, diagonal brace. I would use 1/16 sheet 2 yr $27.00 ( I t 00 membership fee plus $2000 subscription) there w ill be a new president of NASA. t yr I7.S0 ($50 membersfup lee plus $7 00 subscription) from the front to just aft of the wing's Age to A under 2 yr H I SO ($1 00 membership tee plus *12 SO subscription) Please give this person your w hole­ trailing edge. From there back, I would hearted support. I know that the organi­ use 1/32 sheet. zation can make a significant impact on The next step is the fun one. By using a Ages are as of July 1 of the current year. Please circle applicable fees. the scale community. I will be continu­ long sanding block, sand each balsa strip ing to help in whatever way possible,and so that it has some contour. Do this with New member j Renewal Q Address change Q will run scale at the Nats again this year. each one. Now, sand carefully several bulkhead stations at one time, giving Current expiration date: Mo. Yr. N *m « AM A « FAI RULE CHANGES them the proper shape from the front to Proposals from the Scale Subcommittee the back of the fuselage. Because of the Address for the 1982 CIAM Agenda initial framework, contouring the fuse­ lage properly is done quite easily. With City. Stst* Z«p 6.1.6.C this type of construction, the stringers After the word ‘removed’ ADD ‘nor

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may anything except a dummy pilot be 5. Craftsmanship 10 ‘The evaluation is broken down into six added to the model . . (see minutes). 6. Scale detail 7 items.’ Reason: Model must be presented for Total 65 6.1.9. flight in the same condition as when Items 1-3 to be judged at a minimum Para. 2. Delete last sentence. static judged. distance of three meters from the model. Para. 3. Delete entirely. 6.T.9.4 Proof of Scale Items 4-6 to be judged at a minimum distance of one meter from the model. Judging a) Delete and replace with the fol­ Reasons: Entries in F4C in its present After the heading ‘Judging’ add: lowing: form are decreasing. The standard of Items 6.1.10.1 to 3 must be judged at a An accurate three-view scale drawing scale models in Standoff Scale is almost minimum distance of three meters, and or color drawing of the full-size aero­ indistinguishable from that of F4C en­ a handler who is not the contestant plane having a minimum scale of 1/72 tries. The above proposals to modify the should be present to position the model and a maximum of 1/24. A selection of proof of scale requirements and the as directed by the judges. Items 6.1.10.4 photographs showing the aircraft in side static schedule will make for one strong to 6 must be judged at a minimum view, front view, and plan view can class, and will also reduce the time distance of one meter. No measure­ replace the three-view drawing of early required to judge a model by 60 percent ments are to be taken. aircraft for which no drawings may exist. without impairing the accurate assess­ b) Delete first two sentences. ment of the model. Acceptance of the 6.1.10.1 Third sentence, add: An authenticated proposals will eliminate International Delete entirely and replace by: written or printed description is also ac­ Standoff R/C Scale as a separate class. Scale Accuracy. ceptable. The simplified Static Judging Schedule Firstly, have the model positioned in a Next paragraph. Delete last sentence: will also apply to F4B. pose similar to that in the best photo­ ‘If the drawings ... source.’ graph and check for any obvious dis­ e) Delete. (While you may experience some crepancies, also assess the 'character' Reason: See reason under 6.1.10 difficulty fitting this section into the FA I ana realism of the model. Repeat this below. section o f the AM A rulebook because of missing paragraph numbering. This will procedure with other suitable photo­ 6.1.10 Judging for Fidelity to set the flavor of the changes for you.) graphs. Then, using photographs and Scale and Craftsmanship (Annex 6A) Annex 6B, Judges’ Guide drawings, check: Delete and substitute the following: for Static Judging a) The side view, including the fuse­ lage outline, cabin or canopy shape, (Three-meter distance): The following proposed amendments cockpit aperture shape, engine cowling 1. Scale Accuracy K Factor to the Judges' Guide are major simplifi­ and spinner shape, outline of fin and Side view 10 cations and are a corollary to the simpli­ rudder, wing and tailplane sections, End views 10 fied 6.1.9.4 Proof of Scale and 6.1.10 wing stagger and struts on biplanes; Plan views 10 Static Judging Schedule proposed shape, angle and position of undercar­ 2. Color 6 amendments above. 3. Markings 6 riage legs and tailwheels or skid, size of (One-meter distance) General Para. 2 wheels and tires. 4. Surface texture 6 Delete first sentence and replace with b) End views, for dihedral, wing thick-

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL‘EM MODEL BUILDER SENT YOU! 71 precedence over the drawings when Bomb racks there is any doubt concerning any item Control cables of scale accuracy. Control horns 6.1.10.2 Fairings Bracing Delete entirely and replace by: Color. Turnbuckles Struts Correct color may be established from Lacing or stitching color photographs, from accepted, Aerials published descriptions, from samples of Venturis original paint, or from accepted, pub­ Brake pipes lished color drawings. Also check colors Undercarriage springing of national markings, lettering, and Tire treads insignia. Camouflage color schemes Wing slots. should show the correct degree of Navigation and landing lights merging of the shades. Pitot head 6.1.10.3 Walkways Delete entirely and replace by: Tanks Markings. Radiators Check the size and position of all Filler caps markings and lettering. Check that the Louvers style and thickness of all letters and Cooling gills figures are correct. Check that any trim Mass balances strips are of the correct dimensions and Instrument panel are correctly positioned. Check camou­ Cockpit or cabin interior detail · flage patterns. 6.1.10.4 Delete entirely and replace by: Pleaser...... Continued from page 17 Surface Texture. The texture and appearance of the surface of the model should reflect that build very quickly. Cut the sides from of the full-size aircraft. hard 1/16 balsa, the firewall from 1/8 Fabric covered types should be cov­ plywood, and the other bulkheads from ered in the correct material, and the 3/32 plywood. I like rounded corners, so outline of stringers and wingribs should I use 1/4-inch triangle stock for the be visible. longerons. Ply-covered or wooden monocoque Glue bulkheads two and three to one types should be correctly simulated and side at 90 degrees. After this dries, glue any sag between ribs and formers should the other side to the bulkheads. This be apparent if this is present on the full- forms a rectangular box as both bulk­ TAYLORCRAFT LTD'S size. heads are the same width. FOKKER D-VI 11 Metal stressed-skin types should show I then glue the bottom sheeting GIANT SCALE 9 SPAN FOR QUADRA simulation of panels and rivets. In all between the two bulkheads. This helps instances, the appropriate gloss, semi­ prevent warping when the firewall is matte, or matte finish should be correctly installed, and when the tail posts are reproduced. glued together. Next, glue in the fire­ 6.1.10.5 wall. I use rubber bands to hold the sides Delete entirely and replace by: together for this. Next, bevel the tri­ Craftsmanship. angular longerons starting about three Model should be checked for quality inches from the tail post so that the MAJESTIC WW I GERMAN FIGHTER, ίο» Ound»· and 2 4C«D of workmanship, with particular refer­ fuselage sides are as wide as the 3/16 fin Engines Scaled IromORIGINAL FACTORY DRAWINGS” Spec lacular scale lligM fully aerobatic excellent ground handling ence to filling of grain; clean, sharp at the tail post. Clue together the Very strong two piece w.ng Scale Γ = 1 mele» |30^>) 9 Ft W S . Ave* 23 lbs USE T-CRAFT 9’ «" WIRE WHEELS. 10.50 PR edges, especially trailing edges of wings fuselage sides at this time. Full size, detailed plans (P.P.I ...... $ 2 5 .0 0 and tail surfaces; correct gaps at hinge Complete the fuselage by gluing the Other superb giant scale plans, lull size 9 P T -1 9 . O u e d ra o r K lo n t z ...... $ 2 8 .0 0 line of control surfaces; close fit where remaining bottom sheeting and the top 108 " Farman Mosquito Quadra $24.00 80" Farman Mosquito 40- 90 Four-cycle $17 00 wings are attached to fuselage, and sheeting. Send cash, check or money Plans sont roiled UPS POST order to: PAltXiMetgn orders add 40% it general finesse. COWL: One of the advantages of TAYLOR-CRAFT LEE TAV air ma·) de *re

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to drill a 1/4-inch hole in each side of the plans to a window, printed side out, and right motor mount (viewed from the cowl at this location. After this, I cut two trace the left wing on the back of the front). Install the motor and radio of pieces of 1/16 plywood, each a 1/2-inch plans. Construct the left wing as you did your choice, and head for the nearest square. In these ply squares, I drilled the right. flying site. another small hole in the center. Using Sand the leading edge of both wings FLYING: The first flight of the Pleaser sheet metal screws, I attached the to an airfoil shape, and lightly sand the required only a slight trim adjustment of plywood squares to the brackets. Next, I ribs and trailing edges. Block up each tip the rudder/aileron, and she flew like a slid the cowl on so that the screws two inches and sand in the dihedral. dream. Aileron turns are fairly slow, could be seen through the 1/4-inch Epoxy the wings together, and epoxy a even with the long wing version. The holes in the sides of the cowl. I then one-inch wide strip of fiberglass cloth short wing version has a rather fast glide. glued the plywood squares to the insides along the bottom seam. It does not drop like a rock, but it is wise of the cowl so that the cowl was per­ The aileron version of this wing is to plan your landing approach. fectly aligned with the sides of the constructed the same way as the two- The throttle described below allows fuselage. All that remained for me to do channel version with the following you to come in slower, and ad power if was to glue on the front of the cowl, and exceptions: block up the tips only one needed for landing. I have always hand- sand the entire fuselage and cowl to inch each; cut out the ailerons; and launched the Pleaser, but it should ROG shape. Cut holes in the front of the cowl install the servo and torque rods. if you have a paved strip. Allow ample to allow for motor and battery cooling. TAIL SURFACES: Simply glue the altitude before your first turn. The This completes fuselage construction. appropriate balsa directly over the Pleaser handles the wind very well. I W/NC; The model flies very nicely plans, remove and sand. I use a piece of have flown in winds up to 15 mph with using rudder-only control with two hardwood to join the elevator halves. no trouble. inches of dihedral under each wing. The FINAL CONSTRUCTION: You have Build a Pleaser, and show those pat­ following instructions are for building completed the basic plane. You may tern guys what an electric ship can really without ailerons. now install the wing hold-down dowels, do. They’ll be amazed, and you’ll be Begin construction by cutting the hinges, and cut holes for the rudder and PLEASED. ribs from the appropriate sheet material elevator pushrods to exit. I cut these THROTTLE: As I like flying for relaxa­ as indicated on the plans. Next, over the holes rather large to allow for the air to tion, I wanted to be able to throttle wax paper-covered plans, pin down the exit after cooling the batteries. If you down. Astro Flight sells a throttle kit trailing edge, bottom spar, and bottom wish, you may use either a ready-made using a resistor which works fine, but sheeting of the right wing. Follow this by landing gear, or make your own from your flight times on low are the same as gluing the ribs in place, then the top music wire, or just fly without gear. Give on high. I wanted to be able to increase spar, leading edge, top sheeting, and the model a final sanding and vacuum this time while flying on low. I know finally, tac-gluing the wing tip in place. the dust off. Cover with your choice of enough about batteries to know that if After sanding the wing tip to shape, coverings. I used Super Monokote. You you wire them in a parallel, you will get remove it, and hollow it out. can trim with almost anything as it does twice the capacity. The switch provides Reglue it to the outboard rib at this not need to be fuel proof. I have found this extra time on low. All cells are in time. that the only motor thrust adjustment series for high, and two sets are in After building the right wing, tape the needed is one washer behind the top parallel for low.

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 73 flying BIG Bird, then most anyone can OVER 50 CONSECUTIVE STARTS WITHOUT RECHARGING . . . So what are you waiting for??? INTRODUCING THE ARE YOU CRAZY? NIST ARTER ” That’s what my wife wanted to know PAT PfNOING ,C H A "Gi when she caught me hotstuffing my left A new and completely revolutionary concept ot thumb and pinkie together. p o w e r for glow plugs in model cars, boats, air­ planes. helicopters, anything using the 1.5 vt. "W hy did I ask? You must be crazy to Standard plug for glow engines Rechargable. (up to 1000 times). Fits in your pocket, works do it on purpose,” she mumbled while sideways or inverted. Fitsthrough cowlings. Uses searching my cluttered workbench for a H e a d L o c k plug adapter. Stays on the plug, not in the propeller Incl charger & instructions. blade to commence operating with. 90 day guarantee After that, if anything fails In a voice almost free of bravado, I tut- (normal usage) we will repair or replace it fo r only SO. for up to one (1) full year!! SEE YOUR tutted her. . . and then applied some of DEALER OR CALL US - BANK CARDS OK. COD OK. YOU PAY SHIPPING . __ Golden West's “ Ultra Super Solvent” to $21.95 the bonded fingertips. In about a min­ S·« Your Ooalor ute, my fingers were separated . . . with 13506 Glendundee Dr. ease; no sore spots or pulled skin. Herndon, VA 22071 However, my smile of victory meant nothing to her. She eyed me curiously. SERVICE (703) 435-5805 "And what if that stuff hadn’t worked, or worse, burned away skin while still m w n c o - 2 I ňčíňíša '\ in series, but you can use your 12-volt car leaving your fingers glued together?” LOWER PRICES and NEW ENGINES § J battery as a power source with this new NEW· CAMPUS BEE - $24 95 jIK—M" switch. she asked. A-23 PEANUT $34 95 MI-TWIN $49.95 I Wife, Dee, was right, of course. .. but SODA CHARGER $8.95 CYRO DYNE CHARGER $7 95 U When flying, I usually pause at the off COMPLETE CATALOG $1.00 for a split second when switching from how else was I going to make sure that low to high. You may blow a fuse if you the solvent worked as advertised? She Peck-Polymers T » ™ also noticed the bottle of Pacer’s “ De­ BOX 2498 -MB______LA MESA, CA 92041 J do not give this brief pause. Keep your batteries up, and join the bonder,” realized what it was, and informed me in no uncertain terms that All that you will need to modify a stock QUIET REVOLUTION. · all other experiments were cancelled ... Astro Flight battery pack is about two so I never did give Pacer’s stuff the acid feet of ordinary household lighting wire, test. I have heard from a few users that a double-pole-double-throw miniature Big B irds...... Continued from page 33 Debonder does equally well in remov­ switch with an off center position (avail­ ing unwanted bonds and cleaning up able from Radio Shack), your soldering cured CA. Both products are touted as iron, and solder. flywheel area from the fuel compart­ being non-toxic and safe, and are defi­ This switch should be put between the ment. This alternative mounting method nitely very handy items to have w ithin original switch in your Astro Flight will shorten the engine overhang by reach.. . wiring harness and the battery . .. not 2-1/4 inches, which makes for a more THE 24-OUNCE ALTERNATIVE between the original switch and the compact and sturdy attachment to the Most BIG Birds have room for some­ motor. Wire your batteries in two sets. airframe." thing bigger than a 16-ounce fuel tank, (Two sets of three cells in series for the The Mag-Aero Bruce has been play­ but often a whopping 32-ounce vessel 05XL, or two sets of six cells in series for ing with has about eight hours flying either won't fit, or isn’t desired . . . and the 075.) Follow the diagram on the time mounted on the front of a home­ for those special occasions, Kraft now plans, and you will have a hi-off-low brew he calls the "Aero-Fly.” When offers their 24-ounce alternative. Not switch. It is operated using your throttle planning this bird, Bruce laid out three only has the tank size been tailored to servo linked to the switch. The only basic requirements: it must be quick to our needs, but the innards also; accord­ difference between this and a normal assemble; it must fit inside of a Toyota ing to Kraft, “ all components are com­ throttle is that off will be in the middle Corolla; and it must fly well with the 1.3 patible with glow, gas and oil, and diesel position. cid Mag-Aero. From what I’ve seen, fuels” . .. and this includes a “ new, To charge the batteries, turn off the there’s no doubt in my mind that all larger fitting for maximum fuel flow.” stock switch. For the 05XL, turn the new three requirements were met. Sporting It’s a step in the right direction, for switch to high and charge at the usual a Q u ickie 500 a irfo il, the protoype sure. No more forgetting (or not know­ time and current. To charge the 075, turn handled nicely, even though it was a bit ing) to replace the pick-up tubing with the new switch to low and charge from on the heavy side at 1-3/4 pounds. The something that won’t deteriorate in a your car for the normal time at twice the Mk II version will be one pound lighter gas or diesel mix. And because this new current. This is an extra feature because and should be “snappier." black fuel line is so l-i-m-b-e-r, the old the 075 requires 18 volts when charged Bruce sez that if he can design a good­ standard Kraft clunk is able to move around and do its job well. Must admit that I was curious about this fuel line so I JOHN POND gave it a two-day soak in raw gas. . . and so far it appears to bp unaffected. Although the new, larger fitting now Old Time Plan Service has an ID of .90, the fuel line and clunk only have an ID of about .60 . . . which The largest selection of plans in the world at the most made me wonder how well the tank reasonable prices. Each list $1.00 could deliver when something like a 3.15 All 4 for $3.00 Kawasaki was demanding its full takeoff No. 13 OLD TIMER F/F GAS rations. Kraft’s Dan Lutz assured me that they had tested this new tank with the No. 13 OLD TIMER RUBBER/TOWLINE big Kawasaki, and that fuel flow was not No. 13 OLD TIMER FLYING SCALE A through K a problem . . . AS LONG AS LARGE-SIZE No. 13 O LD TIM E R F L Y IN G SC A LE L through Z ID FUEL LINE WAS USED TO CONNECT New plans prices effective Nov., 1982- Nov., 1983 THE TANK TO THE ENGINE. According to Dan, “ There’s no fuel flow restriction P. O. Box 3215 because the smaller ID of both the tank San Jose, Calif. 95156 tubing and clunk are so far away from Phone (408) 292-3382 the engine.” I know that Quadra-size

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engines are compatible with the tank fouling and no detonation. that’s all you have to do ’cause the spark because I tested that combination. Shortly after moving up here, I found plug will come out looking all nice and Some of the guys I showed the tank to out that many guys in the Tacoma area shiny. Oh yes, please don't forget to questioned the continued use of "that have been using the Autolite No. 85 reset the gap. . . it do make a difference. plain old clunk . . . instead of a clunk- sparkplug with consistently good results. Keep in mind that no plug cleaner can filter.” As far as I’m concerned, a clunk- I haven’t had a chance to confirm their work miracles: any plugs with broken filter would be bad news . . . because findings yet, but these natives insist that insulators or badly eroded tips should be unless that filter is cleaned very fre­ their Quadras do even better with the replaced. You'll get a lot of mileage out quently (and who wants to have to keep No. 85 than with a 7Y. It very well might of this tool as it’ll help keep your car, getting into a tank), it's going to do its be that our cooler (and moist) climate van, boat, airplane, lawnmower, chain­ job and get choked up, which won’t has something to do with this. At any saw, and weed trimmer engines in prime help engine reliability one bit ... and rate, I thought I'd passthison; you might shape. will, sooner than later, be responsible want to try the Autolite plug in your own HALF-SIZE PLANS FOR $199.95??? for your nice BIG Bird going boom. As a engines. After all, who can’t use more Well .. . yes and no! You do get a lot matter of fact, I don’t use any on-board power? more for that $199.95 besides the plans, filters for this very same reason. Granted, CLEANING SPARK PLUGS like a complete “ Big E” kit that's partially in-line filters are a whole lot handier and No matter which brand you use, plugs pre built: the foam wings and turtle deck easier to get to than clunk-filters, but have got to be cleaned after every two are precovered; and the full length even they aren't checked and cleaned as hours of running time. Your reward for fuselage sides have all longerons and often as they should be. In fact, the only such diligence is twofold: superior uprights glued in place. time we think of the filter is when an engine performance, and interference- The four sheets of plans really do accident or near accident on takeoff free radio control. And the fastest, contain half-size drawings .. . but only occurs due to fuel starvation. I double easiest, and best way to handle this because they don’t have to be any filter the fuel coming out of my gallon chore is to use a spark plug cleaner. bigger with the amount of prefabrica­ can, and make every effort to keep the They’re available just about everywhere tion in this kit. There are enough on-board plumbing clean; so far it’s (K-Mart, Sears, auto parts stores, etc.), sketches and cutaways to simplify and worked well for me. and cost between five and eight bucks speed up construction and assembly This 24-ouncer should also find wide­ .. . and that includes a gauge and a bag (aided and abetted by good, clear spread use as a smoker tank. It’ll give of abrasive (this stuff lasts a long time, instructions) . .. and, in fact, designer those who “ love to smoke” a chance to although extra bags are only about a Ernie Pritchard touts, “ Twenty-four carry a bigger load, and pump out one buck). hours from box to sanding." However, helluva smoke-screen. These cleaners are simple to operate: based on reports from some “ Big E” MOVE OVER CHAMPION, first, put the abrasive into the cleaner; builders, I’ve got to be honest and tell HERE COMES AUTOLITE then, wipe the plug free of excessive oil you that Ernie lied; the guys I talked to Like so many of you guys. I've also and dirt, and following polarity, connect were ready for sandpaper in less than 20 changed over to RC-J-7Y plugs and have the plug cleaner to a 12-volt source; hours... been very happy with the results; that insert the spark plug, and, holding the This “ Big E” is a sporty-looking, 84- extra thrust has been most welcome, switch down, slowly rotate the plug inch low-wing taildragger that comes in especially as it’s accompanied by less counter-clockwise for one minute ... at 14-1/2 to 15 pounds (the firewall is

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 Airworthiness Inspection on all aircraft before they fly. Y’all com e... TIP OF THE MONTH It's Whaťs Up Front! This really has nothing to do with airplanes, but I thought perhaps it might make a lot of you guys feel better to know that . .. “Celibacy Is Not Here­ PUT AN H.B. ENGINE UP FRONT! ditary.” FLYING SAFETY IS NO ACCIDENT Al Alman, 2713 Alderbrook Court. North, Puyallup, WA 98373 (and please keep those cards, letters, photos and fly- in announcements coming, folks!). ·

Electronics . . . Continued from page 25

2.0-volt glow plugs, and fuel pump. In addition, it fast charges both transmitter H.B 61 P D P * and receiver batteries, and discharges • Perry Directional Porting them for capacity testing (automatically TOP PERFORMANCE on F.A.I. FUEL! cuts off at the proper point). The two H.B. Engines offer a full line of model engines, a complete models, one using an analog meter, and choice of accessories and replacement parts the other an LED meter, also provide Write for FREE COLOR CATALOG voltage and current readings of all h b -e n g in e s important functions. Completely solid M ad· in W Gørrnany state, the DaCa Power and Test Panel is HBAVARIAN PRECISION PRODUCTS CO. · Ρ.Ο Box 6. Oept C. New Canaan. Connecticut 06640 priced at $149.95; write for more info: DaCa Model, 14573 Grover St., Omaha, predrilled for an Evra mount). The plane tions, and to get crackin’ so your new NE 68144. has a delightfully low wing loading, BIG Bird will be ready for its debut . . . ELECTRONIC MODEL SYSTEMS which makes it a good match for the Evra and all you've gotta do to get complete EMS was showing an impressive variety . .. although many Quads, and such, are info is send me a 20-cent stamp and your of items, including complete airborne bound to find theirwayontothefrontof correct mailing address. Don’t drag your systems designed to work with all of the this BIG Bird. feet, because we expect a HUMUN­ major R/C brands. Two rather unique Before we go any further, a few words GOUS crowd .. . and preregistered guys items drew my attention, one being about the Evra are in order. I’ve known and gals are gonna have absolute prefer­ called a Logic Link. It is a plug-in module very few Evra owners who’ve been ence over the forgetful and lazy-bones for Kraft 7C, 7CS, and Signature Series happy with the engine, and they’ve all types. Love to see you th e re ... transmitters which replaces the fre­ had the same complaints: too much THE PUGET SOUND ROCS quency module, and is connected via a vibration, too little power . . . and Washington State’s first IMAA Chap­ cable through a Kraft 200-121 Switch impossible to hand-start. Well, as he ter (No. 108), the Puget Sound Rocs, are Harness to a 5C or 7C receiver. It then designed the Big E for the Evra, Ernie off and running with the “ Roc’s First allows complete operation of all system would love to see all those engines Annual BIG Bird Fly-In” scheduled for functions without transmitting a signal. installed on his airplane, instead of July 16 and 17 at the Mt. Rainier Radio Extremely useful when control adjust­ continually being used as doorstops and Control Society flying field . . . also ments or tests are necessary at the field! boat anchors . . . so for only $45 Ernie P. known around these h’yar parts as “ Hog Another interesting EMS product is will breathe new life and fire into your Hollow.” Gotta admit that we probably the “ Eagle" servo, 3.6 ounces of pure present clunker. By balancing both the won’t be able to quite match the '83 Ida muscle. Using proprietary electronics in shaft and flywheel, installing new rings, Grove BIG Bird Bash (at least not this a World Engines S-16 mechanics, the and changing the timing. Mr. Pritchard year), but we’re dedicated to making EMS “ Eagle” produces 156 inch ounces eliminates these three major problem this the best and most relaxed BIG Bird of thrust in a 1.7H x 1.14W x 2.60L areas, and ships back an engine that’ll Fly-In this part of the country has ever package. Transit time is reported to be .5 perform the way you expected it to in seen. seconds fo r 100 degrees; add itio na l the first place. So here’s a personal invitation from all features include ball bearings, and a If the Big E looks, or seems to be, us “ Rocs” to all you folks in and around watertight case. Many other items of vaguely familiar, it’s probably because the West Coast to help make our First interest to large airplane builders are Ernie really liked Ed Kazmirski’s “ Taur­ Annual Fly-In a weekend to remember. listed in the EMS catalog, write and ask us,” and designed a similar wing plan- I’m the Director, so you can seld all your for your copy. The address is: 6175 Palo form, thick root airfoil, and long tail queries my way; by the time you read Alto Dr., Anaheim, CA 92807. moment into his bird . . . ending up with this, we’ll have our flyers and a com­ FULL CO M M AND SYSTEMS a flying machine that’s smooth and plete informational package to send Under the leadership of owner Bruce gentle, and flies at a constant speed, back to you. Batch, Full Command Systems had on even in a dive. I like this new offering The MRRCS’ flying field is BIG and display a number of newly developed because it helps to fill the need for good, ROOMY, so don't worry about being items, including some futuristic-looking sport-type BIG Birds. For more info, the guy to cause an overcrowding transmitter designs which could easily contact: E&L Manufacturing, 8631 E. problem . .. just bring as many BIG Birds be the shape of things to come. Of Laredo Lane, Scottsdale. AZ 85253, (602) as you’d like to. We will be both AMA immediate interest to thousands of 941-0633. and IMAA sanctioned, so you'll have to owners of the old Texas-based EK Sys­ IMAA FESTIVAL have current AMA and FCC tickets in tems radios is the fact that Full Com­ Another reminder that time is getting order to fly) .. . but you certainly won't mand has a complete inventory of all short if you’re planning on being at Ida have to be an IMAA member in order to parts, from the smallest servo gear, to Grove on August 18 to 21 for IMAA’s participate in the fun. All AMA and complete replacements, as well as rapid third annual International Fly-In Festival. IMAA safety rules and recommenda­ and expert service available for all EK’s Now’s the time to make those reserva­ tions will apply, including the IMAA manufactured. 76 MODEL BUILDER Amongst all the familiar items, I was glad to see that Full Command is still making the airborne switch mount, which in my opinion was the best one ever devised. Like everything made in those days, it fits the Noble switch, provides free and positive switch opera­ BUILD WITH THE WORLDS' FINEST PARTS FROM DU«BRO tion. does not require drilling a hole in the switch knob, and has a small, neat, almost invisible operating knob outside HINGES KWIK-HINGE SLOTTER the plane. Anyway, for this, and all other SMALL NYLON HINGES EK parts and service, Full Command is Easy to install, precision molded, the place to go. Write to Full Command nylon hinges are flash free. Each Systems, 908 E. Rosewood,Spokane, WA locked together and checked for 99207. smoothness at the factory. Ideal smaller airplanes. Six holes in ea HOBBY SHACK side give DU-BR0 hinges holding power. Hobby Shack's electronic offerings Cat. No. 118 (6 per pkg.) $1.00 cover all phases of the hobby, not only Cat. No. 119 (15 per pkg.) $1.95 with a variety of imported and domestic products from other manufacturers, but STANDARD NYLON HINGES also with its own brand. It now markets Also easy to install w ith the DU-BR0 two complete R/C systems, the basic no­ Kwik-Hinge Slotter or a knife blade. frills Aero Sport, in four and six-channel They are as strong, smooth and safe systems, four servos, fully Ni-Cd as the smaller hinges. equipped. For the more advanced flyer. Cat. No. 116 (6 per pkg.) $1.10 Hobby Shack has its seven channel Cat. No. 117 (15 per pkg.) $2.49 Cirrus 850 XLC, which in addition to enough channels for most competition applications, also features full Ni-Cds, o o o HEAVY DUTY Va scale HINGES servo reversing, three dual rates, and a o o o Built to take heavy loads. DU-BR0 Three hardened steel, black oxided blades full one-year warranty. heavy duty hinges are %" wide by fit neatly in your No. 2 X-ACT0*knite handle ;1 3/8" long and .040 thick. They and work in conjunction with our alignment Another new and useful item which o o o use a 3 /6 4 " dia. cotter pin for max. jig that features three interchangeable snap caught my attention is a new Thunder o o o convenience and strength. on guides. For precise hinge installations. Tiger optical tachometer, claimed to Cat. No. 257 (15 per pkg.) $3.75 Cat. No. 216 Complete set $1.95 have better than plus or minus 3.5 percent accuracy over the entire oper­ ating range. In addition, it is switchable E-Z CONNECTORS S N A P -O N OR PEEN ON over three ranges, 0 to 8,000,0 to 16,000, Connectors, Especially and 0 to 32,000 rpm, and is also switch- made to hold tight on able for two, three or four bladed props. any size control arm. These DU*BR0 “SNAP-ON” All indications are made on a wide, high new snap ons can safely be BALL LINKS legibility meter, which also displays used over and over again. A Washer is provided for a Bolt on links, threaded links or battery condition on the proper setting permanent installation. links with rivit shafts take care ol any misalignment. Tough nylon link of the function switch. Power is pro­ Cat. No. 121 $.98 (pkg of 2) vided by one internal nine-volt transis­ snaps on and holds tight. Excellent tor battery. This is certainly a worthwhile 0U-BR0 KWIK-LINKS & for offset steering, throttle and servo hookups. (5 piece set) addition to any serious flyer’s accessory NICKEL PLATED SOLDER LINKS list. Tried and true spring steel Cat. No. 180 (Bolt On) $.85 Set Hobby Shack is located at 18480 Kwik-Links are ideal for any Cat. No. 181 (Threaded) $.85 Set Bandilier Circle, Fountain Valley, CA control linkage. Nickel plated Cat. No. 182 (Rivit) $.85 Set 92708. solder links will not corrode and make an attractive and KRAFT SYSTEMS easy to solder connector for A complete line of from two to seven- servo or horn. channel systems was on display at the Steel-Cat. No. 109 (2) $.75 HEAVY DUTY 4-40 Solder-Cat. No. 112 (2 w ith 2 link Kraft Systems booth, as well as every­ BALL LINK guards) $.69 thing for the car, boat, or airplane Shown actual size, this new hefty, modeler, from beginner to expert. ball link is perfect for any V< scale NYLON KWIK-LINKS AND MINI-KWIK-UNKS A new servo was being shown, similar application. Four piece set includes in size and weight to the popular KPS-24, Made for self threading, these a new, heavy duty nylon socket. Cat. No. 259 $1.25 which is designated the KPS-28. Its claim "sure lock" links for any throttle to fame is the fact that it provides 60 hook-up. The Mini-Links are only ounce inches of torque, compared to 45 W long. Standard-Cat. No. 122 (2)$.39 SOCKET HEAD BOLT for the KPS-24. The KPS-28’s size is 1.61 x Mini-Cat. No. 228 (2) $.39 AND BLIND 0.83 X 1.39 inches weight is 1.6 ounces; NUT SETS includes ball bearings; is watertight; PLATED STEEL T-PINS uses a sealed pot; and has a splined output shaft for offset output wheel Strong smooth and sharp in three For those who preler socket head bolts. '· settings and maximum strength. The r popular sizes. 100 pins per package. Includes 4 each ot Bolts. Flat Washers, Lock KPS-28 looks like a good choice for high Washers and Blind Nuts plus one Allen performance aircraft, in which it could 1” Cat. No. 252 $1.50 Wrench. 17 piece set. Two sizes. High be used for the primary flight controls, 1V4” Cat. No. 253 $1.75 strength steel. 1V4” Cat. No. 254 $2.00 and mixed with KPS-24’s on throttle and Cat. No. 129 (4-40 x 1)-$1.10 (4) auxiliary functions not requiring quite Cat. No. 130 (6-32 x 1)-$1.10 (4) so much servo power. For more information, contact Kraft DU*BRO 480 Bonner Road Systems, 450 W. California Ave., Vista, PRODUCTS INC. Wauconda, Illinois 60084 MAY 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 77 prefer that method, and the other is a pistol grip module, contoured to fit the “W h a ťs New at Wilshire?* nand. Throttle control on the latter ------2200 mm------Ι- system is through a trigger, and steering is through a large wheel. Adjustable dual ΒΙ­ Ο-7954 rate steering is available on both of them. Drop a line to MRC and ask for complete information, you’ll find it interesting. The address is 2500 Wood- bridge Ave., Edison, N) 08817. Ů NORTHEAST ENGINEERING As attractive as it is. Northeast Engi­ Molded foam wings with spar neering’s Driver Panel is not just another Γ J inserted — just cover with sup- pretty face . . . it’s one of the best buys in C a r m u / plied silkspan and brush on glow plug lighters that I know of. It is A S W 1 9 thinned white glue — a strong, consistent and reliable without being $ 9 9 95 tough surface! over complicated ... or overpriced. It is Another of the famous almost- •Specs: 2 channel · 86.6" span adjustable to match your favorite plug, ready-to-fly sailplanes from • 35 oz. · Wing Area 544.5 sq. in. will light two plugs on your twin, and for Germany. Semi scale, beauti­ • Wing Loading 10 oz./lt. you tinkerers, it is available in kit form. ful T-tail, super flyer! German/English Instructions The surprise for me was that there is an Send $2.00 for Wilshire "H i Tech" model info pak! improvement to it, in the way of an audio transducer, which, when attached wilshire model center to the output, tells you of the conditions 3006 Wilshire Blvd. · Santa Monica. CA · the plug is seeing, without having to 90403 · Phone (213) 828-9362 look at the meter or guess. It does this by transforming the pulses, which vary RC Sailplane and Electric Power specialists tor the U S A according to the demands of the plug, into sound. It works, it tells you valuable Irvine, CA 92714. information, inquire directly from P.O. Box 6201, Bridgeport, CT 06606. M cDa n ie l r/ c ''FLEX-OFF" McDaniel R/C, makers of the ever NOVAK ELECTRONICS FLEXIBLE METAL EXHAUST TUBING popular Ni-Starter and recently intro­ A small but versatile line of R/C duced Bo-Starter, had a new charger to equipment, Novak Electronics servos, show us. It is called a System Charger, receivers, and associated accessories, • LIGHT WEIGHT GALVANIZED STEEL ■ EASILY KENT, WILL HOLD ΙΓ ·* SHAPE and it is designed to charge both re­ has rapidly established a reputation for ■ FUEL PROOF-NOT EFFECTED I t HOT ceiver and transmitter Ni-Cd packsfrom quality and reliability amongst all its EXHAUST 0ft MOT FUELS ■ WDftH DRIVE CLAW INCLUDED your car battery, via the cigarette lighter users. Servos and receivers are small in •WEIGHS ONLY SLIGHTLY HORE THAN socket. Big Bob’s charger revives your size as a result of the combination of RUBBER OR PLASTIC TUBING four-cell 250 mil pack in 30 to45 minutes; advanced design and proper compo­ 500 mil pack in 60 to 90 minutes; and a nent choice. A full dress rehearsal of all -SIZES TO FIT HOST NJFFLERS- 1200 mil battery in four hours. Eight-cell Novak’s equipment was held for us No. I06F0 1/2« d la .x 12« 5.7S No. I07F0 5 /8 " 41«.X 12" 6.00 transmitter batteries are charged at a at this year's show. No. I08F0 3 /4 " d la .x 12" 6.25 No. I79F0 7 /8 " d la .x 12« 6.50 rate of 140 to 150 mils. Complete instruc­ The stars were the new NER-26 two- tions are included with each unit. The channel receiver, the NES-1A servo. The TATONE PRODUCTS CORP. price is $19.95 plus $1.50 shipping, for receiver is tiny, 1.45 x 1.3 x .7 inches, 1209 Geneva Ave. San Francisco. Ca.94112 the basic charger less the plugs neces­ weighs .75 ounces, and is made fo r 415-334-7189 sary to connect it to your R/C system. Futaba-type plugs. It is compatible with Another $5 bill will get you a charger all AM receivers, features a triple-tuned CA 92083. with the plugs of your choice. Full info front end, double-balanced mixer, and LEISURE ELECTRONICS from McDaniel’s, 13506 Glendundee diode noise clippers. It is available on all “ Everything for electric power” could Dr.. Herndon, VA 22071. 27, 53, and 72-75 mHz frequencies (old well be the motto of Leisure Electronics, MODEL RECTIFIER CORPORATION and new), and for Europe and Asia, all 35 as in fact it does “ have it all” , from The MRC display is always a main and 40 mHz frequencies. batteries in different types, to motors stopping point. . . with everything from The NES-1A servo is claimed to be the with special windings for both cars and cars and airplanes to submarines, and of world’s fastest midget servo, with a airplanes, and chargers with an input course, R/C systems being there in transit time of .27 seconds for 90 degrees and/or output to fit just about any abundance, you want to be sure to take of rotation. It weighs .98 ounces, with 1.5 requirement. The serious fan of electric your time and not miss anything. X .75 X 1.180 dimensions. It features a five power should certainly take a close look The R/C systems include the Vector pole motor, and can be used with three at the Leisure 109 Digital Charger, which two, three and four-channel systems, to five Ni-Cd cells. if properly used, should be one of the the latter even being available with dual­ Of course, we can’t overlook the NER best ways available to completely charge rate capability. All systems feature 1-9 competition-quality receiver, and those competition batteries without fear ceramic filter, triple-tuned front end the more modestly priced NER-6, both of that life-robbing overcharge. The receivers, and small, high torque servos. of which share most of the high specs of Leisure 109 incorporates a digital meter There is an MRC system which I think the NER-2S. For larger airplanes, there which accurately measures the adjust­ warrants extra attention. It is called the are two servos, an NES-2, and a high able current output, and then measures Grand Prix: a three-channel system power, ball bearing, watertight version the voltage so that charging may be designed for boats and cars. It takes a known as the NES-2H. A complete line stopped at the proper point. A timer is completely new approach to shortening of high quality Ni-Cd packs of all sizes, included, and the charger may be pow­ that link between the brain and the switch and extension harnesses are also ered from an automotive battery or the vehicle with a new concept in control available, making it possible to com­ Leisure 110 DC Power Supply, a 110 volt hardware. The transmitter is a belt pletely equip your vehicle, whatever it AC converter which provides up to attached unit, and is completely out of might be, with all Novak components. three amps of nine to 12-volt DC power. the way! There are two controllers, both Write to Novak Electronics, 2709-C A complete catalog is available, write to lightweight, one of which is a slightly Orange Ave., Santa Ana, CA 92707. Leisure Electronics, 11 Deerspring, traditional two stick unit for those who POWERMAX

78 MODEL BUILDER A new kid in town, Powermax, (well, new to the U.S., it’s old hat in England) appeared with a variety of accessories and kits for show and tell. Included was Soldering Tools an interesting Windmeter, a small, self- contained electronic unit that accurately answers the old question, “ Doyou think it’s too windy to fly?” Model 1200 delivers The Powermax Windmeter needs only 100 watts, heats instant­ to be placed in unobstructed air to read ly. Two tips included. the wind velocity on an easy-to-read Model 900 delivers 60 analog meter scale (up to 25 mph/45 watts. And Model 300 kph). Price is $33.99. More info on all delivers 30 watts. Great products is available from 359 Trousdale for all soldering jobs. Dr.. Suite A, Chula Vista, CA 92010. Send 25 cents for cata­ log and price list. K & S RADIO CONTROLLED MODELS, INC. Engineering, 6917 W. Boats, boating accessories, and pilots 59th St., Chicago, Illi­ were some of the things seen at the RAM nois 60638. Telephone: display. But naturally, we were more 312/586-8503. interested in the extensive assortment of electronic items, which break down roughly into three categories: lighting systems, control devices, and fail safe devices. The first group includes nav, strobe, and landing lights for airplanes, and complete lighting systems for cars. In the control device category, we have electronic throttles and timers. The last group, fail safe devices, comprises such worthwhile devices as battery cyclers, which can be difficult to locate on the Ave., Denver, CO 80223. battery alarms, battery backers, and a market in small quantities. Included is a L.R. TAYLOR & CO. personal frequency monitor that should large variety of ready-made harnesses A number of familiar “ faces” were on be just the ticket to help with some of for many of the most popular R/C hand at Taylor & Co., such as the Accu- the confusion that is bound to occur at systems currently on the market. Keep Charge, an automatic charger for 12-volt crowded fields as the new frequencies them in mind when that need comes up. wet or gel cell batteries, and the Multi- begin to show up. The RAM products Royal Electronics is at 3535 S. Irving St., Charger, designed to simultaneously sheet is certainly one worth asking for. Englewood, CO 80110. charge two transmitter and four receiver Write to Radio Controlled Models, 4736 ROYAL PRODUCTS battery packs. The Super Power Panel N. Milwaukee Ave., Chicago, IL 60630. Royal Products (not to be confused provides all of the voltages necessary for ROYAL ELECTRONICS with Royal Electronics, which is an a wide variety of field equipment, This Colorado-based company has a entirely different company), was show­ including quick chargers for the receiver wide variety of R/C equipment and ing its Titan Servo, in two sizes. The Maxi and transmitter, and a meter to monitor electronic accessories to offer the mod­ Titan has overall dimensions of 2.31 x .87 all of the important functions. eler. Some are unique, such as the X 2.5, weighs 1.8 ounces, and is rated at The Taylor Power Pacer, made in expanded scale optical tachometer, the 54.1 oz.-in. of torque. It is built around various models for different transmitter Protach, and the dual LED timer Cycle/ the successful Signetics 544 chip, and battery supplies, is a combination capa­ Charger which tests and charges five and includes other features like ball bearings city tester and charger; a very valuable eight-cell transmitter, and four-cell and carbon pots. The Micro Titan, at .64 piece of test equipment which will pay receiver battery packs. There are also a ounces, measures 1.52 x .5 x 1.25 inches for itself the first time it points out a couple of very interesting receiver kits, overall, with a torque output of 18.08 defect in your batteries, thus saving you two and four-channel, in 1.64 x 1.45-inch oz.-in. It uses an European SAK150A an airplane. L.R. Taylor & Co. is at 20831- cases, only .8 inches high, weighing only chip, coreless motor, and carbon pot. 1/2 Roscoe Blvd., Canoga Park, CA one ounce. These servos are available with cables 91306. Royal Electronics is also a good source and timing for most of the R/C systems SWITCH OFF! of many of the individual electronic now available here in this country. Royal Such was this year’s electronics at the components used in R/C equipment Products’ address is 790 W. Tennessee IMS. There wasn’t a great deal that can

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MAY 1983 WHEN CONTACTING ADVERTISERS, TELL ‘EM MODEL BUILDER SENT YOU! 79 prices are quite reasonable too, nearly at the "poor graduate student level” ,so we felt it was quite a bargain. But, I digress, back to the flying! The flying site is beautiful, it is just HEAD LOCK Éťft north of Pepperdine University, and is on top of a buff overlooking the ocean. Unfortunately, the site is for sale, even Single Cyl. $ 7.95 though it is not really suitable for REMOTE Twin Cyl. $11.95 building (it is unstable). Hopefully, the 1. Energizes your glow plug thru a remote jack state will buy it as a park, but that is uncertain in these times of “ no money." 2. Compatible with existing “HEAD LOCK's" Bill Winans was there with his Olym­ 3. For cowled engines, helicopters, scale etc. pian F3E with a Geist 40/16 powered by 4. Uses “ HEAD LOCK" push-twist action 16 red Sanyo sub-C cells. This electric airplane was advertised in the January 5 . We i g ht-less than Ι/ j ounce PAT 4221452 issue of Model Builder. It is designed by /1 not available. w rit* direct add 50a (S t outside US. I Larry Jolly, who is well known in electric M ODEL PRODUCTS CORP. BOX 314 Pompton Plains N.J. 07444 circles as a leading designer. The overall impression that you get looking at this plane is power, it is big (10-foot span), often driven harder (by competition and and sleek. The Geist folding prop hauls ATTENTION 1/4 SCALERS competitors) than the regular motors. this seven-pound plane up easily, the The Geist literature mentions currents of EPOXY GLASS COWLS FOR: climb is powerful and rapid. Once the 30 amperes if you want to push it that far. NOSfN PiCA StD MORQA h B A i SA u SA PlATT CONCEPT power is off, the plane flies like a fifir MOSterifR PCM T CPAfJ SHfBfR PlTTS f, % Wow! thoroughbred, it moves fast, but it has a SCAIÍ SuPfPCUB FOKKfRQ 7 BOL/NG P T2 P-26 F4B2 The best part of my visit to Wilshire F4B4 SPARROW HA Wx G££ B£l MOO Y MA CB R /£N $ low sink rate. It has a "M ercedes" look TURBULEN! CHRlSTf N £AGL£ BRlSlGHf l l A S STARDUSTER was talking to Hans Weiss, the owner " I SCALf J3 Bi BABY FLYBABY AlRCAMPfR PILOT in the air, smooth, fast, and powerful. JUNG MANN I 3 5 SCALE ft OTHERS and chief guru there. Hans knows his Bill is an excellent pilot, and he could electrics forwards and backwards, he WHEEL PANTS FOR make the Olympian do anything he ClTABR/A STAROU.'TER II PITTS SKYBOLT LIBERTY SPORT flies what he sells, and he makes trips to wanted, but I think an intermediate pilot CHRISTEN EAGlf PS E h a w k . STf ARMAN STINSON SR 9 Germany fairly often (to visit family) so MULLIGAN ft O THflS could handle it well too, and would have he knows what the state of the art is in a lot of fun learning how to use its high BRAZEO b HEAT-TREATED WIRE GEARS b CABAN ES Germany. Hans is something of a phi­ performance. Bill says it stays up longer LARGE SCALE PLANS AVAILABLE losopher as well, by the end of the visit than the floaters every time! I was very Send SASE tor latest list we had covered everything from elec­ impressed with it. The spoilers are very We supply Modelers with fiberglass parts for your trics to how the world could be im­ plans— Write or call us effective, and when they are deployed, proved (more modelers!). the plane comes down right now. If you T ft D FIBERGLASS SPECIALTIES TOS.’S BlOC* GARDEN OTN M, 18>3S Hans really backs up what hesells.and want a very high performance kit plane, PHONE (313) 421 6358 gives instruction both for electrics and I think that this is the best I have seen. sailplanes. The visit ended with an Bill also had an Electricus powered by be considered startlingly new, but it is invitation to come to the Malibu flying a Challenger 05 motor (Astro colbalt). good news, that while not mentioned site the following Sunday and see some This electric plane was also designed by individually, I did notice little in the electric flying. That was an easy invita­ Larry Jolly, and was a construction article way of price increases since last year. In tion to accept! Hans even has a map and in the March ’83 issue of Model Builder. fact, considering the general state of the checklist for his students, which I took Bill’s plane uses seven Sanyo sub-C cells economy, R/C systems are one of the along. and an 8x4 prop for a flying weight of 46 few bargains that I know of; they are For those who have not been to the ounces. This plane is like the Olympian better and cheaper than ever. I hope Malibu area, I have to say a few words. with its fast climb and smooth flight. Like you’ll plan to be with us at the 1984 There are a couple of sights you the Olympian, it has an air of authority, it International Modeler Show in Pasa­ shouldn’t miss if you do have a chance to goes where you point it. dena. · visit that area. One is the beach just It would be interesting to compare the north of Pepperdine University, it is Olympic 650 and the Electricus in flight, beautiful, and at this time of year (winter the 650 is much slower, so a beginner Electric...... Continued from page 27 months), deserted. To a northerner like would find it easier to fly. An inter­ me, that's amazing, because the day was mediate flyer would find that the Elec­ power. The EM 40/14 will turn an 8x6 at warm and pleasant, and Sandra and I tricus could cover more ground,and in a 12,000 rpm on 10 ceJIs, the EM 40/18 will spent a happy hour walking along the contest where the need is to find turn a 9x6 at 12,000 on 16 cells,according sand picking up sand dollars and broken thermals, this would most likely give the to the factory literature. On 12 cells, the seashells that had washed in from a edge to the Electricus. The sink rate of 40/14 will turn the Geist 16-inch folding recent storm. the Electricus is excellent, even though prop at 4600 rpm. The Geist folding prop The other sight is the Malibu Canyon the Olympic 650 has a little more area, I is one of the best available, with a road, which starts at Pepperdine Uni­ think the sink rates are about the same. machined aluminum hub and fiberglass versity, and winds into the canyon. The Hans Weiss had a Primus by Carrera blades. The EM 40 direct-drive models mountains here are spectacular, with (which has an extensive line of electric are $149.95, add $34.95 for the gearbox the rock layers tilted almost straight up. power units and planes). Hans carries for folding props. You can almost see the land being the Carrera line as well in his shop. The Geist now has a new motor for smaller pushed up. Primus has about an eight-foot span, and planes, the EM 30, which is about the Farther back is lovely ranch country, weighs four pounds with three channels. same size as the 05 Leisure and Astro where we bought oranges and tomatoes It was powered by a Carrera system, motors. It is samarium cobalt, and (in December!) for 10

80 MODEL BUILDER THE BEGIN-AIR TRAINER ALL HANDOUT AND MACHINED PARTS Wing Span: 54" Wing Area: 540 Sq. In. Weight: 3'/i lbs. Engine: Η B. .25 _ No. Channels: 3 or 4 . . I *cS Λ γΑΛ«'0 Flat bottom airfoil for easy G»"' stable flight. 403 Industrial Place Palm Springs. CA 92262 325-5494 BEGIN-AIR kit & H.B .25 Engine combo. $81 95 Plans and rib set only $15.95 p.p. DESIGNED BY: Buzz Waltz, Designer of the BIG BIRDY SAIL PLANE Plans for float conversion S6.50 p.p

in the drive shaft, plus the rubber rings installed until after the wings have been act as shock absorbers when the prop fully sheeted. A triangular section is cut PEANUT SCALE MODELS k m . « 95 / ZERO MILES M-18 opens up. The Carrera system is not out from the bottom sheeting, and then _ PIETENPOL ORUINE cobalt, and this did show in the climb the servos are mounted in place (ob­ PIPER CUB COUGAR / ANDRESON GIPSY MOTH rate, it was about half that of the cobalt viously, holes for the servo wires have LACEY M-10 GANAGOBIE Astro and Geist systems. (I guesstimate been predrilled in the ribs). After install­ MUSTANG that the Carrera climbed at 300 to 400 ing the servos, the sheeting is glued back Rubber Powered SPORT MODELS BABY ACE $6.49 feet-per-minute.) into place . . . as this isa fairly permanent ONE NITE 28 $6.95 With all this sophisticated equipment fixture, it pays to follow Sean’s advice of ONE NITE 16 $5.95 around, guess who had the biggest choosing a servo that you know is PRAIRIE BIRD · STHINGLESS $4.95 thrill? One of Hans’ students bought a reliable! Interestingly enough, Sean has KIT $5 95 PECK R.O.G. $1 95 Kitty. After flying it, he had a rough found no need to install electrical BUMPS CONTROLLED landing. While Hans and Bill flew their ‘chokes’ on the servo wires in spite of I I and 13 FOOT LONG.KITS OR READY TO FLY NOW IN THREE electrics, he patiently repaired the their length. He is of the opinion that a COLORS CRAY ORANGE and damage with epoxy, and at last, he was combination of FM radio plus twisting YELLOW LOW PRICES ready to fly. Hans looked him in the eye the wires together prior to installation H ARD JO FIND ITEMS CATALOG ST,00 and said “ You’re ready to solo!” So, he provides a satisfactory method of ‘shield­ PHONE (619) 442-A638 Peck-Polymers or (6191 «9-867S did the whole thing by himself; he hand ing’. As he has experienced no prob­ BOX 2498 MB______LA MESA, C A 92041 J launched it, and circled it above the lems over a number of years using this beach while he climbed. And did it method, who are we to argue? with a razor plane and a sanding block, climb! Slow and steady, it climbed up till “ After the wings have been sheeted, Sean is able to judge the lower surface it was almost too small to see, and it flew the tips are then glued in place. These curves. Admittedly, this is not a particu­ and flew! He got close to a ten-minute are made of soft balsa with a 1/32 ply larly scientific approach, but once again, flight and a perfect landing, all on his core making a sandwich construction it works, and it is certainly within the own! His was the biggest smile there for (see Figure 3). capability of the ‘ordinary’ modeler (is the whole day! “ Although this construction sounds there such a being?). On the subject of So, electrics are fun, from simple to quite heavy, Sean finds that tip weighs ‘undercamber; Sean suggests that if in sophisticated, perhaps that is why there under one ounce before the final shap­ doubt, too much rather than too little is is such an appeal in it, there is some­ ing takes place. The ply core has a the best bet. thing for everyone. Have fun till next couple of other advantages. Firstly, it "Covering: Contrary to some of the time! · makes the end of the wing more resis­ rumours flying about prior to the meet­ tant to minor ‘bangs’ (or ‘hangar rash’ as ing, Sean’s method of skinning his wings our colonial cousins describe it). Se­ with fiberglass is remarkably straight­ Soaring...... Continued from page 22 condly, by lining up the ply with the forward and is, therefore, applicable to trailing edge and a centre line drawn on the models we use on the slope. the leading edge, it provides a constant “ The cloth that Sean uses comes from “ The root section of the wing varies reference aid when sanding the wing tip Germany, but can be obtained over here slightly in construction as it carries the to shape. ... its weight is approximately 27 gm/sq wing joining rods in addition to the "On the subject of the leading edge, m (or 3/4 oz/sq ft). Although using ballast tubes. The first two ribs are made this is made up of two materials. As well fiberglass as a finish sounds heavy, Sean from ply (1/8 in I think) and these are as the standard balsa leading edge, there pointed out that it adds 3-1/2 ounces spaced one inch apart. After the holes is a 1/8-inch hardwood strip (ramin, I whilst covering in Solarfiim adds five for the ballast tube and the two wing believe) glued to the front (see Figure 1). ounces. Guess which is the stronger? rods (which are quarter-inch piano This obviously makes the leading edge “ To attach the cloth to the wing, Sean wires prebent 9-1/2 degrees for the more durable at the expense of a very uses a German epoxy, but he has recently correct dihedral) have been made and m inor w eight penalty. Sean recom ­ tried some resin available from Avicraft the tubes installed, vertical blocks of mends that you buy the hardwood from (Bromley) and he reports some very one-inch balsa are glued in between the a hardware store rather than a model satisfactory results." (I would use Safe-T- ribs filling all of the space. This whole shop as it is likely to be cheaper, and it is Poxy from Aircraft Spruce and Specialty, unit is made up separately and then is available in single lengths long enough P.O. Box 424, Fullerton, CA 92632, also a glued in place on the bottom sheeting. to use on each wing. good source of contact cements, and “ The top sheeting is glued in place “ The final step before covering the micro-balloons, wrf) using an impact adhesive (contact ce­ wing is to attach the epoxy sheet facing "Before commencing the application ment), although the sheeting is attached rib, and then to sand in the ‘under- of the resin (and hardener), it is neces­ to the leading and trailing edges using a camber.’ The epoxy rib is cut to the exact sary to cover your building board with a P.V.A. type glue (or Hot Stuff). It ought shape of the airfoil. By using it as a polythene (polyethylene) sheet . . . the to be pointed out that the servos are not template and carefully working away reason for this will be explained shortly! MAY 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 81 just baking soda, officer, re-e-ally!” Well, get a load of this page one story NEW! BLACK BARON in the Orange Coast Daily Pilot that appeared on January 8, 1983 entitled. "Laguna sued for $100.000.” EPOXY PRIMER "A woman who said Laguna Beach police arrested her on suspicion of possessing cocaine when the substance Spray it on raw in a film cannister turned out to be balsa or fabric. baking soda has filed a $100,000 claim Sands quickly & against the city.” I don’t want to quote from the Pilot smoothly. Then extensively here for copyright reasons, spray your but what followed the poor gal’s arrest favorite color of was kinda scary. A field test was con­ Black Baron ducted at the scene of the illegally- parked-car crime which proved positive Epoxy paint. A . .. some kind of narcotic was in the can. fuelproof, fool­ A second test was performed in police proof system. HQ after the gal insisted it was just baking soda . .. same results, but this time the police said it was either "co ­ caine, Novocaine. . . one of the caines." Picture yourself in this predicament! What would your reaction have been! I’d want a competent lawyer, FAST, and a soft chair to sit down in and quiet my shaking knees. Look for this label: OSVEMTES Well, somebody must have wanted a the world’s first third opinion, because the substance in rear view of the BLACK question was " . . .sent to the Orange . Black Baron. County Sheriff’s Department crime lab BARON for analysis, ‘we received a report back that they could find no narcotics in the substance. . .’ ” The county tests said, yep, it’s bakin’ sodie all right! So, back the film can went to Laguna Beach . . . CØVERTE and more tests there. 420 BABYLON RD„ HORSHAM, PA 19044 USA Test number three in Laguna Beach proved positive AGAIN . . . and the Sean covers both wings at the same time, Sean recommends leaving a strip of department went out buying different doing the top surfaces first. As to the cloth about 1/16 in wide at the trailing types of baking soda for testing! Lord, amount of resin used, Sean finds that edge. When the bottom surfaces have save me from Laguna Beach police if I 15cc of resin per sq ft of wing area been attached, this makes a very robust am ever caught there with my field box! (measured before the methanol thinners (and sharp) trailing edge. The final GOOD NEWS FOR SLOPE FLIERS is added) is just about right. sanding is done with 240 grade paper Just so that you d o n ’t th in k that "The wings are laid ‘back to back’ which Sean uses dry in order to avoid everything you see in the newspapers is (trailing edge to trailing edge) on the cutting through the cloth in his en­ bad news, pay attention to this next board (see Figure 4), and the resin is thusiasm.” story. The headline reads: “ Hilltop brushed through the cloth using a wide, Sean Walbank continues with instruc­ added to Niguel Park.” Big deal, right? I soft brush and working from root to tip. tions for making Bannister’s aileron w ouldn't have noticed it except that I Where the cloth comes into contact with hinges (basically the notch and tape got a call from Curt Stevens who pointed the polythene sheet, the capillary action method), for making Algebra tail it out be me in the Wednesday, January 5 of the resin will draw the cloth down feathers (carved out of 1/2-inch balsa!), issue of the Saddleback Valley News, onto the surface of the wing. To aid this and how to ballast the Algebra using Mission Viejo edition. action, Sean advises that a thick line of tungsten-silver rods which weigh almost It seems that quite a few slope glider resin should be brushed onto the lead­ 150 percent more than lead rods of the fliers have been using a site in Orange ing and trailing edges of the wings as this same dimensions. County, California known to them as gives you something to sand back to at a I hope you found the construction "Kite HilT'and known to the land devel­ later stage. techniques of one of Britain’s best opers as "La Paz Hill.” Well, last Decem­ "After brushing on the resin, a stan­ modelers profitable, I did. Thank you ber 21, S and S Developers donated 19 dard roll of lavatory paper (soft!) comes again, Sean Walbank, for sharing them. acres of hilltop land near the northwest into action. This serves two purposes. See you in York this July! end of Laguna Niguel Regional Park to Firstly, it gets rid of any excess resin (a BUSTED FOR BAKING SODA the County of Orange in Southern warning was issued here as it is appar­ For years now, I have been carrying a California . .. including this slope site. ently very easy to take off too much small, metal photo film can full of baking County designer Denny Turner said resin, and then the wing will need soda. Why? Because until recently, it was that improvements would be made to sealing). Secondly, and more important­ the only substance available that could accommodate the R/C glider fliers who ly, it allows you to evenly distribute the be used with FHot Stuff or similar CA continue to use this barren, steep grade resin over the surface of the wing. adhesives to form fillets or to “ kick o ff” for their flying. “ Sean reckons on d oing the top stubborn cures. "Improvements considered include a surface of the wing in an evening,allow­ Often, and I do mean often, I would paved road to the top of the hill, a ing them to dry overnight, and then look at that stuff and think, “ I hope no possible restroom building, parking lot, completing the bottom surfaces on the cops stop me with this stuff ... it could picnic area, and lawn area.” following evening. be tricky to explain as it looks just like Turner indicated that the R/C soaring “ When trimming the excess cloth cocaine or PCP or ???’’ But I was never pilots that were heard from regarding after the top surface has been covered, REALLY worried by it ... I mean, " It’s these improvements said that they 82 MODEL BUILDER didn’t want trees planted or a landing strip put in. What a nice thing for a WILLIAMS ArrLQ Q nPTLQ county government to hear: improve­ BROTHERS ALLLJJUKI l J ments, yes; lots of ’em, NO /Turner also said that $50,000 was allotted for the design work . . . and that this was "p ro b ­ i PILOTS ably more than would be needed.” STANDARD · SPORTSMAN The bottom line of the story was, RACING · MILITARY "some improvements could be ex­ pected soon.” THAT, my dear readers is WHEELS ► encouraging . .. not just for people in VINTAGE · SMOOTH CONTOUR BALLOON · GOLDEN AGE this area, but elsewhere as well. If more county designers and planners knew how little weslopers ask for in the way of i ENGINES improvements for existing county lands PRATT & WHITNEY · WRIGHT · IE RHONE . . . perhaps we would see more official flying sites. If the opportunity arises (and it did here in Los Angeles County about I?ARTS ► \ WHITNEY · IE RHONE two or three years ago) where there are WRIGHT · GNOME public hearings about proposed land use plans, or whatever, get a few bud­ dies together and invade the place. Let -GUNS] your voices be heard, in numbers, and V don’t wait for "somebody else” to do it, either, because nobody else will . . . it’s LEWIS · VICKERS · SPANDAU · PARABELLUM up to you! Don't be shy! And join the AMA while you are at it, the insurance is SEND $1 FOR FULLY ILLUSTRATED CATALOG r f llJ A S M good PR and a strong bargaining point DEPT. MB 181 PAWNEE ST. SAN MARCOS, CALIFORNIA 92069 M O l INC for organized flying. JUST FOR THE RECORD contest here for three years running the warmest 2MWC ever held (June in Two months ago when I introduced with the same ship. This year I was third the San Joaquin Valley of California is a the Larry Jolly Model Products new over all nationwide. I also won the LSF heck of a lot warmer than the Mojave or Pantera sailplane. I inadvertently omitted tournament this year and placed second Las Vegas deserts in mid-winter); and a few facts. Larry Jolly and I are good two years ago. Pantera has dominated there will be plenty of sunlight left to fly friends. We belong to the same soaring the skies over North Texas, Oklahoma, in before sunset and the end of the club, the Pacific Soaring Association. and Arkansas now for several years. It contest (no more trophy award pictures When Larry first showed me the very first has a well established contest record. in the dark!). Man, if you miss this one, I production line Pantera, he explained to I made partial kits and sold them for feel sorry for ya. me where the design originally came about four years, but time and expense AIRFOIL OF THE MONTH: E-201 from and how he modified it for the kit. got in the way, so Larry and I got I'll have to plead ignorance on this (Fuselage now one-piece molded ’glass, together, and hence the full kit. one, folks. I’ve never tried the E-201, so I wing now standard built-up construc­ I do not fly the polyhedral configura­ can’t speak from personal experience. tion, stab slightly smaller, fuselage tion any longer. I have gone to full foam However, this is the section that was slightly larger, modified tail fin and wings and tails, and of course ailerons. I mentioned more than a few times in this rudder.) still have the original ship; I keep it for a column in regard to the Algebra VIII F3B Well, to me the design was brand new, back-up and drag it out every year to fly ship that Sean Bannister designed and and for LJMP it was a new kit . . . so I the NSS contest. flew to second place in the 1981 WCs. called it "new ,” and soon after received This information is mainly for your This much I can say: the zero lift angle the following letter from Don Chauncey files as I thought you might be interested of the 201 does appear to be the same as of Plano, Texas reminding me of what to know Pantera is an older, well estab­ the 193 as Sean said; it is a thicker airfoil Larry told me regarding the Pantera lished design. Keep up the good work in (11.9 percent) than the 193 (10 percent) heritage. I thought it would be of your column. It is very interesting which might allow a slower stall speed general interest to you, so I am repro­ reading. for the wingtips as used on the Algebra. ducing it here: Good lift, It has a flatter glide polar (L/D polar) Bill. Don Chancey curve than the 193 which looks like it has I thought you might be interested in Thanks Don, I didn’t mean to imply a definite "drag bucket.” some more information on the “ Pan­ that the Pantera was an LJMP design, my The E-201 was originally intended not tera” . The ship is not a new design! Larry mistake. Besides, a design as good as the as a wingtip section, but as a root section first became interested in the design at Pantera deserves proper recognition. where its extra thickness allows extra the 1979 Nats where we had seven of the 2MWC: JUNE 11 AND 12 strength without the added weight of ships there between four people. Some This is just a reminder for those of you heavy spar material. The E-203 is its of these seven were almost two years old planning to attend the fourth annual thicker (13-1/2 percent) brother, also then. The Pantera is actually older than Two Meter World Cup that preregistra­ designed for this purpose. Now, if I the Saggita!!! Most of all, Pantera is a tion begins and ends in the month of could only read German. . . pure-bred Texas design. (All the good May (deadline: May 31, 1983). It’s not WHERE TO WRITE ships don't come from California!) too late to get a registration form from Please note that my mailing address is My original design had a foam core Ed Slobod at 9626 Jellico Ave., North- either 1843-C Pomona Ave., Costa Mesa, D-box with a vertical full depth spar. The ridge, CA 91325, but you had better not CA 92627, or c/o Model Builder, P.O. fuselage was made in two pieces consist­ put off writing Ed for very long . . . the Box 10335, Costa Mesa, CA 92627 .. . ing of the main pod and a special tail days are fast approaching! many of you out there still have me on boom. Larry didn’t feel the foam lent Above all, don’t miss this 2MWC. It is your mailing list as 487 Mesa Rd.. Santa itself to mass production, so he changed going to be the best yet (by far) in several Monica, CA 90402 . . . this is NOT COR­ the structure back to a conventional ways: it will be held on a grass field (not RECT and I would appreciate greatly any D-box of all wood. dirt and rocks as before); it will have the steps that you could take to remedy this The Pantera has been flown in the '79, best contest winches ever seen any­ situation for me. ’80, '81, and ’82 Nats placing in the top 10 where in any contest, there will be five Remember, the Q and A Forum that I in each. I personally have won the NSS standardized 12-volt winches; it will be mentioned in my February column is still

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 83 nose is straight, the tail rotor is pro­ (213) 764-1d9C)l ducing enough thrust to oppose main [Chafes J o . 3 rotor torque. No less, no more. A tail R/C GOODIES rotor is usually kind of touchy to fly. It 13400-26 Soticoy Street Lanier has a very narrow range where it will Φ α/tgaín Φοκ North Hollywood, Colif. 91605 P in to keep the nose dead straight. Any little Reg. change in the main rotor will require a MADE $109.95 tail rotor correction. IN ONE CHANGE PRODUCES ANOTHER U.S.A. Please refer to Figure 3. Now, as the SPECIAL 810 tail rotor blows air to the right, it actually R/C SYSTEM CASH pushes the whole helicopter to the left. Dry Tx This left d rift is corrected by giving a .19 - .35 ENGINE i Rx Nleads S39.95 touch of right cyclic. Makes sense, right? 2 CH ., 2 Servos $99.95 CH-4 Servos Other Lonier Models Available This drift of the fuselage is called trans­ 3 CH ., 3 Servos 114.95 Charger CRAFT-AIR lating tendency. Follow me closely on 4 CH., 4 Servos 129.95 Ship - $6.50 the next point, because you’ll realize something that you probably have never HEAVY DUTY directly thought about. 4-IN. SANDER CASH V 71-1/2· Each time you make a change in tail Adjustable table. $14.95 - Span rotor trim it varies the amount of thrust 10 discs $3.00 For Ship $ 3.50 produced by the tail rotor. This changes Miter guide $1.00 2-CH. 2-METER the amount that the helicopter fuselage cash $27.95 Radio COMPETITION SAILPLANE wants to drift. So there is a slight roll Ship $ 3.50 $25.00 correction needed to eliminate the OR different translating tendency. In short, CASH DISCOUNT PRICES SHOWN. 20% deposit MORE every time you trim the tail rotor, you’ll ^forC.O.D.'s. Catalog 75ς in U.S., $2.00 Foreign. CALIF. RESIDENTS ADD SALES TAX j have to retrim the right/left cyclic! You don’t have a bad roll servo, you simply have the translating tendency which changes very quickly and in small incre­ RELIABLE ENGINES A U NEW! ments. Here is a typical example for AT CUSTOM SCHNEURLE, anyone flying helicopters: Pilot is hovering, very small up-gust of REASONABLE PRICES CON 009 ENGINES! S' 'V wind hits nose of helicopter. Helicopter Midwest Model is the source (or: Racing & Stunt versions with special starts to lift higher, pilot reduces collec­ hard chrome & honing technology. tive pitch. Less collective pitch, less • IRVINE ENGINES FROM ENGLAND A lso, torque, but with the same tail rotor pitch • H.P. ENGINES FROM AUSTRIA Complete Inventory of individual stock the nose starts to go right. Pilot gives a • COMPLETE STOCK OF SPARE PARTS and custom parts for Cox touch of left tail rotor to keep the nose T.D. 020, 049, 051 & 09 engines. • COMPLETE SERVICE FACILITY straight. Pitch comes out of the tail rotor Competition parts & accessories for and the tail rotor blows less air. Now ^ Dealer Inquires Invited ^ Combat, Free Fit., C/L & R/C Racing, there is less translating tendency, but the Speed, Stunt & Team Race. WRITE OR CALL FOR MORE INFORMATION right cyclic is still in, so the helicopter Exclusive distributor for the MIDWEST MODEL I starts to drift right. Pilot gives slight left Λ Λ 5 Nelson 15 engine & parts. cyclic to keep the chopper over one For detailed catalog, send 50 cents to: spot. Helicopter now settles down to BOIitlR3 5 BOMfOVHU 3 3 E 11 í 40441 Kustom Kraftsmanshlp, Box 2699 original hover altitude, and the pilot Laguna Hills, CA 92653 Telephone: (714) 830-5162 adds throttle to stop the descent. From going, so if you have any questions that here the whole scenario starts again, but you would like to have answered, just there is more torque, nose wants to go drop me a line . . . I won’t consider any left, pilot adds right tail rotor, etc., Choppers.... Continued from page 35 question too simple or too complex to etc . .. (Good grief! wen) answer (within reason). · TAIL ROTOR COMPENSATION as a tail rotor having cyclic pitch like a The easiest way to keep the tail straight main rotor. There are also no “ fixed- is to use some sort of compensation Pattern...... Continued from page 16 pitch” tail rotors because for every system. There are basically two ways to change of lift in the main rotor, the tail this end, mechanical or electronic knows-what-else. The receiver now rotor has to change its thrust to vary the mixing. Please refer to Figure 4. Here is a becomes the weak link in that it must lift which keeps the nose straight. simple mechanical mixer as found on select from signals that are very close CONTROLLING THE TAIL ROTOR the SuperMantis and Heli-Boy. When together, and in some cases those When you give a right tail rotor collective pitch is added, the collective unwanted signals are unintentional command, you are really overcorrecting yoke swings forward. As there is no tail splatter that no one knows about. for main rotor torque. The tail rotor rotor input in this example, the point The price of new radios has dropped provides thrust to keep the nose straight, where the tail rotor pushrod attaches to dramatically over the past few years, so it plus additional thrust (when needed) to the mixer acts as a pivot point. The seems like it is time for someone to build continue to rotate the fuselage against "pick-off" point is where the tail rotor a super-dooper receiver that will handle main rotor’s torque. When you give a pushrod comes off of the mixer to the these problems. I'm sure that there is a left tail rotor command, you are essen­ tail rotor. market for a truly improved, though tially taking out some corrective tail As the yoke swings forward, the pick- more expensive, receiver design ... rotor thrust, and letting torque turn the off point moves forward, automatically Any takers? · nose to the left. Very rarely (if ever) will giving more right tail rotor. By this "right the tail rotor actually push the nose left. tail rotor,” I mean the tail makes the That’s why the nose always wants to nose turn right. Always think of thenose turn easier to the left than to the right. being moved right or left as the case may One way it lets torque take over, the be. other way it fights torque. When the To set mixing, hover the helicopter. 84 MODEL BUILDER Add power to start a vertical ascent and note which way the nose goes. If the nose goes left you are not getting enough mixing. Adjust the pick-off oint down. If the nose goes right, you NÄ , ave too much mixing, move the pick- SIZES! off point up. Competition-Proven Please note that when the pick-off point is moved up, tail rotor sensitivity will be increased. Conversely, when the OCTURA pick-off point is moved down, sensi­ tivity will be decreased. Feel free to asjust tail rotor throw by moving the link X-SERIES in or out on the servo arm after final mixing has been set. Figure 5 shows how the collective PROPELLERS attachment point acts as the pivot point for tail rotor inputs. As the tail rotor servo moves the lever, the pick-off point X-tra SpeedL.X-tra Performance! moves, which gives a tail rotor input. Figure 6 is the second way to add FOR PERFORMANCE YOU'LL BE PROUO O F... mecnanical compensation. Exclusively These, as all Octura Propellers, meet the most exact­ used in Kavan helicopters, this method ing requirements. Available now in beryllium copper. can be used on any helicopter (fixed or Fit 3/16" shaft. Check your local progressive hobby shop. ,__ collective) where the collective and tail RECOMMENDED rotor servos can be arranged to be ( X 4 4 0 /3 3 .5 OUTRIGGER X445 APPLICATIONS located side-by-side. Order a mixing I t X447 7.5 OUTBOARD lever with bushings from Condor Hob- .75 DEEP VEE < X450 bies, part number 2508 at $1.50. This is X455 surely the easiest way to add mechanical 7 .5 OUTRIGGER * 4 5 5 / 3 65 SCALE HVDRO m ixing to a h e lico p te r that has no X457 65 DEEP VEE provision for it. X460 Referring again to Figure 6, a collec­ X462 65 OUTRIGGER a oo •X 467 go DEEP VEE tive input swings the mixing lever while fÄ , and P"« the right servo (tail rotor) acts as a pivot / 3 indicates 3-Btaded Propene» point. This moves the pick-off point ca,a list forward which gives the compensation. “SINCE 1954” - To set this mixer, hover the helicopter OCTURA MODELS. INC. 7351 N. Hamlin Ave · Skokie, IL 60076 and add power to start a vertical ascent. Note which way the nose goes. If the nose goes to the left, you need more temporary, additional "kick” to the mixing, move the pick-off point toward compensation system. If the collective/ R/C Auto .... Continued from page 48 the collective servo. If the nose goes throttle is moved very slowly, the over­ right, you need less mixing, move the shoot doesn't do a thing. On the other think works best on your track. This has pick-off point toward the tail rotor hand, large, quick collective move­ been common practice for Delta in tires ments give maximum overshoot. (With servo. for 1/12 and 1/8 scale sizes, by the way. mechanical mixing the “ overshoot" is Again, let me note that the tail rotor Now they have a new compound that not available.. .) sensitivity will change as the mixing is looks great and works even better in the One thing you do have to be careful changed. 1241 series. So far, I have used it just on with, when setting up this kind of radio One more point. I have given illus­ the Super Phaser and in the AA (softest) trations and directors for clockw ise system, is to make sure that the elec­ compound, as the pavement here at the rotating helicopters. For counter-clock­ tronic mixing switches under the trans­ house is fairly slick. Also available are A wise machines the torque is reversed, so mitter panel are set for the direction of and B compounds. The A compound is all left movements become right, and main rotor rotation of the helicopter probably the most universal, and the vice-versa. you’re flying. Carefully check this point, one to try first. A word of warning is that ELECTRONIC MIXING then stand over the helicopter and add this 1241 compound is pretty soft, and This is the easy way to set mixing . . . collective pitch. Make sure the compen­ may cause some cars to hop in the from the transmitter, while you're flying. sation system fights torque by following corners. With all of its chassis tricks, the The system is simple to set up, as the tail the examples I have given you. Back­ Super Phaser is m uch less prone to rotor control rod runs directly from the wards mixing is worse than no mixing at hopping through the corners, but older tail rotor servo to the tail rotor. When all! Reversing the throttle (via the servo cars that are quite rigid may have prob­ the collective/throttle stick is moved, reverse switch) to get correct throttle lems with the very soft AA compound. the electronic mixing in the transmitter movement w ill reverse mixing too. Take As an aside, we have the same situa­ automatically gives a throw command to care here if you are running throttle and tion in 1/8 cars. With a Delta Super J, for the tail rotor servo. Normal tail rotor collective independently on the new example, when the traction comes up commands remain as usual, through the helicopter radios. You may have to use you have to put B rubber on the rear, or tail rotor servo. It might be easier to an opposite rotation servo to make the car will hop in the corners and won't understand if you just think of the things work properly. Anyway, when turn as well as desired. But on the same mixing function added “ on top of” any using electronic mixing, set the mixing track with the Delta Eagle (a suspenson ordinary tail inputs. knob first, then adjust the overshoot car, for those who don’t know), the A Two knobs control this additional knob to correct for the quick ascents. compound is used for the extra traction input. The ” mixing” (Revo on JR Apollo) Whether you choose mechanical or it gives; if it w on’t turn, you go softer on knob governs how much input the tail electronic mixing, either will give a the front tires, and the suspension will rotor servo gives with collective/throttle perfectly mixed helicopter that lets you do its job of eliminating any wheel hop changes. The "overshoot” (Acc on JP forget about all of the minor (but or bouncing. Apollo) knob senses how fast the collec­ pesky) tail rotor inputs necessary with no The other new item from Delta is a tive/throttle stick is moved, and gives a mixing at all. See you next month. · simplified version of their very popular

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 They got a chance to send along one of the new/old (take your pick) kits of < & Way *° ma'nta'n nicads the RC150. It is new because this is the first time this exact car has been mar­ <*·’■ ONLY *19* keted, it is old because all of the com­ ponents come from either the RC100 or RC200, in fact, some of the parts can be SIMPLE CYCLER used interchangeably on the RC300. Why pay lor another charger when you already own one? Cycle your Rx. and Tx. Plans (previously mentioned), to actively packs the easy way throughout the year. The SIMPLE CYCLER gives you an audible campaign the car this season are falling warning when your packs are discharged to the level recommended by the manu­ into place as friend John Snyder has facturer. Then safely recharge with your radio system's charger. You can easily agreed to build the car and race it. As determine the percentage of power consumed and that remaining in your pack. John and I race and practice together, I Simple, safe, cheap. Connectors not included. #RED 22 will get plenty of chances to drive and • See your local hobby shop · All products made in U S A work on the car. And in case you’re _ _ _ · Send a S.A.S.E. for full information. wondering why I’m not going to race the Π ιαΓΓΙ 4736 N. Milwaukee Ave. — Chicago, IL 60630 car, it’s because I am presently hung up IF UNAVAILABLE LOCALLY. ADD S1.00 FOR DIRECT ORDER. NO C.O.D. on the suspension cars, so my personal pecking order as far as race cars is concerned is the Delta Eagle suspension car first, Associated’s RC500 a close second, and the Delta Super J third, even Can you really afford to use less if it is a pan car. Beyond those three cars, than the best battery packs made? my interest in racing takes a serious SR: drop. That doesn’t mean the RC150 should be overlooked; it is a good, solid club SR aerospace grade battery packs racer, just as the Associated label sug­ give you gests. Besides, for the $75 retail price, • 3 Times the flying time how could anybody with an interest in • The ulimate in reliability car racing (and not already ownine a 1/R • 80 Packs to choose from for car) pass it up? How about the guy who transmitters, receivers, and electric powered cars and planes wants his kid to race with him? Maybe • Send a self-addressed, stamped you just want to rat around a parking lot business size envelope for full close to home, and you definitely do not details want to plunk down the hundreds of dollars asked for a contemporary race ,ΘΛΤ renes «MC car. BOX 287 BELLPORT NEW YORK 11713 Even though the Dirty Racing Team’s RC150 isn’t built yet, it does look like a Peak Detector charger. This new device step backward with a gear diff. good club racer. All you have to do is to does all the good stuff, it just doesn’t Actually, I don’t know the whole story build it right . .. and that may be a little keep you as informed as to what is going on Delta’s gear diff, however, I suspect tough, unfortunately. The instructions on. Operation is very simple: hook the that Art Carbonell has a lot to do with it, leave many things to the imagination; I charger up to the 12-volt power source, as he is extremely sensitive to what an am having trouble with some of it! You plug in your battery pack, select a one or R/C car is doing on the track, he is very see, I live in MRP’s backyard, and there three-amp charge rate, push the reset good at trying detail changes, and he is never have been many Associated 1/8 button (if the red light doesn’t glow able to see what effect each change has cars around, so I’m not familiar with all brightly), and then forget it. When the on the car. The way I get the story. Art of the details. Even if it takes a couple light goes dim, your pack is fully charged, was noticing some unusual differential phone calls we’ll get it running, and then and ready to race. Or more accurately, action on his Super Phasers which were pass along some help via pictures and your pack is charged and now being using the Associated ball diffs. The cure the written word. trickle charged ... no more watching (for a problem that I have never noticed Staying with thesubjectof Associated, meters, no more blown packs. Goahead, at all) was to simply use a new main gear, the front end setup on the RC12i has walk up and down the pit area before fitted with clean balls, for each run. Just been modified, production parts should the next race to see what everybody else using a new gear was found to pick up a be available as you read this. The main is doing, you might even find time to few inches on the competition at the exit change is to make the front end a help out the race director for a few of each corner. springer. minutes, better yet, you will have a With that knowledge, they went on to I heard from Gene Husting at Asso­ moment or two to "help out” with the work on a new diff that would give the ciated after my column on Kent Clau­ transmitter impound, altering every­ desired differential action in the turns, sen's RC12i (which won the Stock class at body’s trim knobs. yet not slip excessively when coming off the World Champs) was published. Whatever you do with this new found the corners. A gear-type diff was proven Gene relates that all of the detail setup spare time, your pack will still becharged to be the answer. Then it was up to Bill done by Kent was found here in the and ready to go when your heat comes Campbell to make one small enough to Dirty Workshop, so none of you have up. This convenience w ill cost some fit on the car. This diff does not get any reason at all to claim that you aren’t bucks; this new charger is $65, but it is plunked into the middle of the axle, as current with what Associated is doing. worth it, especially noting that the same you might suspect. Instead, it is installed OK, they have probably been doing thing with all the whistles and bells sells right where a regular main gear goes, so more fine-tuning since the Worlds, but for $125. you can see the packaging problems! But there comes a point in time when the car As long as we are talking about Delta that has all been solved, and the new is better than you are. If you have built a products, latest word is that they are just Delta gear-type diff will probably be car like Kent's, and still can’t crack that A now finishing the tooling for production available by the time you read this. It will Main at club races, it is time for more of a (get this!) gear-type differential for install easily on the Super Phaser, all practice and less fiddling. 1/12 cars. All of us have been happy with models of Associated electrics, and most One point that I mentioned concern­ the ball diffs, especially the Associated other 1/12 cars as well. ing Kent’s car, but did not elaborated version, now we are seemingly taking a SPEAKING OF ASSOCIATED. .. on, was that he had insulated the an- 86 MODEL BUILDER tenna from the graphite radio tray with the use of a nylon button. The reason for this is that mounting either the antenna or receiver on a chunk of graphite 4 CHANNEL detunes the receiver considerably, and NOVAh this applies to any brand of radiosystem. ELECTRONICS AIRBORNE Don’t do it! ·

R/C World .. . Continued from page 15 • 6 CHANNEL RECEIVER* tables. The next bay contained various • 4 MIDGET SERVOS (NES-1A) model association exhibits, along with • * p nn an information center and raffle booth. $i 7 u oo • 500 MAH SQ. BATT (SANYO) In the third bay, there was a large 1 1 u • AILERON EXTENSION concession area on one side of the • MINI SWITCH HARNESS passageway, and an indoor electric R/C car race layout on the other side. In the last bay, about half a dozen model Futaba/compatible plugs railroad groups had set up and were •SPECIFY FREQUENCY Matches all modern TX operating their layouts, the largest being Plug-in crystal incl. at least 20 feet on each side. Back to the Add $2.50 UPS model and manufacturer exhibit bay, Calif, residents, add 6% double swinging doors in the north wall Allow 3-4 weeks for checks led from the passageway to a huge set of Send 9% x 11% SASE for NOVAK ELECTRONICS 2709-C Orange Ave.. grandstands facing onto the ball park. A free brochure Santa Ana, CA 92707, (714) 549-3741 large dirt area just in front of the grandstands was separated from the ball park by a white, wooden, post-and-rail is a show worth attending. And modelers fence. A dirt track was set up for off-road in the northwestern states, if you support car racing, and the ball park area just the show by your presence, it will past the fence provided plenty of room become the major modeling activity in for live helicopter demonstrations. As your area . . . if it isn’t already! · buildings and fences completely sur­ round the fairgrounds and admission (adults $2, children $1) is paid as you Counter...... Continued from page 10 enter through one control gate, there is no need to display ticket stubs or hand radio capacity. stamps as you wander freely between ★ ★ ★ Nick Ziroli's AT-6 "TEXAN” the live demonstrations and the manu­ TML Manufacturing proudly an­ For 2 to 4 Cu. In. size Engines facturer displays. nounces the addition of the new Quadra GIANT R/C SCALE PLAN DESIGNS There was no program listing the Q50 engine to its quality line of R/C AT-6 TEXAN* 2.4' =1 101 Spon $27.00 p.p U.S.A. manufacturers who displayed, so we’re aircraft and model engines. The model FOKKER DR-I 2.7“ = 1 63" Trip· $25.00 p.p. U.S.A. F8F BEARCAT* 2 % * = ! 86 Spon $27.00 p.p. U.S.A. guessing that there were about 50 Q50 represents the top of the line, CURTISS P-40* 2V .* = I 94 Spon $27.00 p .p . U.S.A. F4U CORSAIR 2'/.' = l 93' Spon $27.00 p.p U.S.A. exhibitors, with Miniature Aircraft Sup­ producing 3.6 to 4 hp at 8000 rpm with Fiberglass Cowlings & Canopies are available also Send a stamp lor detailed brochures on our Giant Scale Accessories ply traveling the farthest (from Orlando, open exhaust, or with a tuned muffler (Our Plans are sent Postpaid within the U S.A i______Florida), whereas Brooke Model Prod­ specifically developed for this engine NICK ZIROLI 29 Edgor Drive. Smithtown N Y. 11787 ucts (that’s Ralph and Jeanie Brooke) is and available as an accessory. only two minutes away from Sea-Tac Designed for R/C use, the Q50 easily pounds; and wing loading, approxi­ Airport. powers props up to 24x8, and can be mately 24 ounces per square foot. From an exhibitor's point of view, this retrofitted into aircraft using the Q35 All 1.9 to 3.1 ci engines are completely show puts you in touch with a large and weighing up to 40 lbs. (18 kg). The enclosed in the cowl. The 3.0 ci Kavan segment of U.S. and Canadian modelers suggested retail price is $249 (U.S.) per twin is a perfect fit. T and D Fiberglass whom you’ll otherwise never see. It was unit. can provide you with a ready-made a similar situation with the Dallas show, A list of new TML distributors is fiberglass cowl and heat-treated landing which unfortunately, has folded. There available for an SASE. For further in­ gear if you wish (see address elsewhere is no doubt in our mind that this show formation, write to Klaus Nowak, TML in this ‘O ver The Counter"). will continue to grow and prosper. Manufacturing, P.O. Box 544, Huron The Vagabond’s simple construction One thing for sure, the Northwest is a Park, Ontario, Canada NOM 1Y0, or call and gentle flight characteristics make it hot-bed of R/C boating activity, as (519) 228-6514. an excellent plane for the beginner in evidenced by a total of 125 entries in the ★ ★ ★ giant scale. The more experienced will static competition! Most of these were Wendell Hostetler’s Plans, 1041 Hea- find the float version an exciting and racing-type boats, built to national rules th erw oo d Lane, O rrv ille , OH 44667, challenging model. specifications. In fact, the turnout of all (216) 682-8896, announces the release of The price for the Vagabond plans is types of models for the static competi­ its latest giant scale design, the Piper $24.50 postage paid (Ohio residents add tion was the highest in proportion to PA-15 Vagabond, designed to accom­ 5.5 percent); and just in case you were show size that we have seen . . . around modate engines from 1.9 to 3.1 ci. The wondering, yes, those two girls do look 450in all! Trophy plaques were awarded Vagabond plans follow the tradition of like they could be Ray Hostetler’s sisters the top three in each category. quality established by the Hostetler . . . they are! Introducing Linda and Actually, this writer was so impressed Skybolt, Liberty Sport, Bucker Jung- Elaine Hostetler, the original Hostetler by the static model display, that most of meister, Curtiss Hawk, P6E, and Art plans! the show photos taken feature these Chester’s Jeep. ★ ★ ★ entries. As stated earlier, we'll see the The Vagabond was designed from If you are a model engine manufac­ newest products at Toledo. factory drawings at a scale of 32.5 turer, what better way is there to cele­ In closing, we suggest that those percent. Specifications are: span, 114 brate a fifth business anniversary than to manufacturers who are playing the inches; length, 73 inches; wing area, introduce a new five-cylinder radial "wait and see” game wait no longer. This 2250 square inches; weight, 20 to 24 engine. This is exactly what Techno-

MAY 1983 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 87 supply you with just about anything you MODEL IGNITION ENGINES S ACCESSORIES need to beef up your models without adding weight. Write to Twinn-K for latest information on application and other particulars on these fabulous products. P Rf ) f T S ★ ★ ★ Balsa USA is proud to announce the release of its new Standoff Scale biplane, the Der Jager D 1X. Designed in 1969 by 77 Products now has NG K ME-8 miniature spark plugs, Marshall White, the Der Jager D IX is a designed specifically for Model Ignition Engines. current WW-I type homebuilt that’s just Threads and Hex size same as Modern Glow Plugs price is $5.00 each, total for fun. postage is $1.50 regardless of quantity. Will fit most original Ignition The deluxe Standoff Scale kit is 1/3- Engines and all Modern Ignition Conversions. size (80 in. wingspan) which makes it ideal for the large gas engines of 2.2 ci (213) 329-0273 17119 SO. HARVARD BLVD., GARDENA, CA. 90247 and up. Both wings are one piece, so there are no flying wires to hinder fast field assembly. The deluxe kit includes full hardware this year for easier installation. The (except hinges), rolled full-size plans three-cylinder radial is the same 1.3 ci showing all wing panels, formed ABS Perm aGril displacement as the Big Bore 5, and its cowl, wheel pants and aft deck, formed eight-inch diameter fills out the cowls of and shaped spring temper aluminum Lifetime sanding tools* ™ two-inch scale aircraft nicely. As with landing gear, giant instruction booklet Tungsten carbide grit, hardest the Big Bore 5, the three-cylinder radial with four pages of photos and instru­ material next to the diamond. swings a minimum prop size of 14x6, but ment sheet, decals, rubber cockpit unlike the Big Bore 5, its price is $695, padding, etc. All balsa, plywood, and Finishes faster, better, easier. which makes it the bargain engine of the hardwood is AAA quality. Die-cutting is Technopower line. fall out quality. Both engines are in full production Other specifications for the Der Jager 1"x9" and are available immediately. Write to D IX are: length 68 in., and weight 20 lbs. Technopower II, Inc., 16650 S. 104th $ 6 9 5 p P Price is $124.95 plus $2 handling,and $12 Ave., Orland Park, IL 60462, or call if C.O.D. Balsa USA pays UPS. Acces­ flat tool Technopow er at (312) 349-1998 fo r sories available are: five-inch Du-Bro S g 9 5 p p additional information. wheels, $7.99; 4-1/2 inch aluminum ★ ★ ★ Ohio res. add 6%S .T. spinner, $8.99; dummy engine, $9.99. While we are on the subject of en­ Contact Balsa USA, Inc., P.O. Box 164, Coarse and line gines, here’s one from CMB that’s Marinette, Wl 54143. (906) 863-6421. The tungsten carbide specially designed for marine use. New Der Jager D IX is available directly from grit brazed to for 1983 is the CMB/3.5cc Marine, the Balsa USA. steel, on each 9” ultimate .21 ci size marine engine! long tool, for ★ ★ ★ The CMB/3.5 is built with the same Dynamic Models, Drawer C, Port use on balsa, quality and design as its record-holding hardwoods, Jefferson Station, NY 11776, announces big brother, the CMB/90 Marine. The fiberglass, the availability for immediate delivery of beaded foams, specs on the 3.5 are: bore, 16.4mm; its new 1/4-inch-scale fiberglass WW-I I epoxy fillers stroke, 16.4mm; horsepower at 30,000 “ Castle” Class Corvette hull. and plexiglas rpm, 1.5 Standard equipment on the 3.5 The fully detailed hull shows all plate } r includes: flywheel; universal; slide »LIFETIME lines, port holes, panama ports, and carburetor with adjustable needle valve hawse pipe holes. It has a length of 63 REPLACEMENT H H 1 - iw H GUARANTEE trim; and muffled tuned pipe. inches with a beam of nine inches. While (when used as directed) Direct and dealer sales invited. Send being suitable for any corvette, it should Made in U.S.A. SASE to TEJA Engineering Co., 16201 be noted that this hull features“ joggled” Ask your Dealer or send check or Μ. O. (No COD's) to Brimhall Rd., RRT9, Box 399N, Bakers­ plating which makes the plating larger D.G. PRODUCTS field, CA 93309, or call (805) 589-0554 for and more noticeable. 209 Carrlands Dr. information. The hull is supplied complete with a Dayton, Ohio 45429 ★ ★ ★ full-sized, highly detailed plan that will Phone 513/294-1192 Twinn-K, the racing people from produce award winners. All of the Indianapolis, have new “ meatball” fittings shown on the plans are available power II, Inc. has done with its Big Bore decals in both 1/12and 1 /8 scale. Agreat from Dynamic Models. An interesting 5 glow powered engine. aid to a busy race director. The white alternative for this hull would be a The Big Bore 5 is the same physical size and black meatball decals are adhesive weather ship, as some of the hulls of this as the older five cylinder radials (six-inch backed for easy use ... just peel off and class were rebuilt after the war as ocean diameter), but it has a displacement of stick on for fast and easy numbering of weather ships. 1.3 ci, which is accomplished by elim i­ cars with a simple ink marker. Ask for catalog No. 124 if you wish to nating the cast iron liner and running The decals come 12 meatballs per have the 1/4-inch-scale corvette hull the piston in a hard chrome bore. The sheet and retail for only $2 per sheet. For with plans for only $124.95. For just the Big Bore 5 also has heavier articulating the 1/12 scale decals, ask for catalog No. plans alone, ask for No. 124P, full-size rods and an extra heavy crankshaft. Cast 0987, and for 1/8 scale, ask for No. 0988. corvette plans, only $10. aluminum rocker boxes help dissipate Write to Twinn-K, Box 31228, India­ The new, 1983 Dynamic Models 64- the heat generated by the increased napolis, IN 46231, (317) 839-6579. page catalog displays this hull as well as power of the Big Bore 5. This radial will Also available from Twinn-K is a wide over 25 more large scale fiberglass hulls run with a minimum prop size of 14x6. selection of graphite composite mate­ and over 400 fittings and accessories for The price is still only $795. rials. Ranging from sheets of cured the R/C scale model boater. The price of The icing on the five-year cake is the carbon fiber reinforcement (nine differ­ the catalog is $4 via first class mail, which Technopower three-cylinder radial ent sizes) to quarter inch, 90 degree is refundable on your first order. which has had a carburetor relocation corner strengtheners, Twinn-K can ★ ★ ★

88 MODEL BUILDER Power lor any size sailplane· low current t h e n e w p o w ' r t o w w in c h ! RETRIEVER MORE ZIP & LONGER BATTERY LIFE draw · anti-kiting & manual drum brakes •adjustable speed· parachute «turn-a­ round· toot switch· 115 lb. braided line — end use it with the RETRIEVER for : launch-a-minute flights «an end to line shagging delays and line crossings · drag tree operation without tangles· heavy-duty cables and clips «braided 30 lb. lin e · tow ribbon «hand sw itch· line guides and ball bearing swivels

m DAVEY SYSTEMS ■ CORPORATION ONf WOOD LANE, MALVERN, 9A.193S& plus shipping <2IS)644-0692 Write or call for more information plus shipping

Craft-Air has just released a new becoming very popular in the off-road aerobatic sport trainer named "SCOUT scene. Designed to give variable speed 15” . The Scout 15 was shown at the IMS control, this unit can replace your two- show in Pasadena, California, January 8 speed Tamiya speed control. The Digger and 9, and was tremendously received 10 speed control features a heavy-duty resistor mounted on a bracket which by both the public and trade alike. “ Matched Performance System” The Scout 15 is the ideal transition mounts right to the servo, and comes for TOP PERFORMANCE airplane from high wing trainers, to with a micro switch for reverse, com­ K&B ENGINES more sophisticated low wing aerobatic pletely wired and ready-to-go. Ask for 16 Airplane · a Mame planes. The Scout 15 is very easy to Part No. BL-4610 ($24.95). K&B FUELS K&B GLOW PLUGS build, and exceptionally easy to fly. This Items two and three are closely re­ 7 Blends a choices airplane is highly maneuverable, ex­ lated and are often used together; they “ Matched Finish System” tremely stable; and capable of doing are the Digger 10 side nerf bars and rear for BEST APPEARANCE nearly all the aerobatics of pattern cage. These tubular steel bars will K&B FIBERGLASS CLOTH K&B MiCfO-BaHOORS Fil l e r k&b super poxv resin k&b super »oxv t- inner airplanes. protect your 1/10-size off-road car from K&B SUPER POXV PR'MER K&B SUPER POXV °AiNT The Scout 15 has been available since nits from the side and rear. Both are K&B MIXING CUPS painted black. Ask for Part No. BL-5110 the end of February. For more informa­ ^ K&B MANUFACTURING tio n , w rite to C ra ft-A ir, Inc., 20115 ($8.95) for nerf bars, and No. BL-511 12152 Woodruff Avenue Nordhoff St., Chatsworth, CA 91311. ($10.95) for rear motor cage. — Downey. California 90241 ★ ★ ★ For a complete Bo Link catalog, send M etal Concepts, Inc., 10635 N.E. $2 (refundable) to the above address. Fuel Lines. . . . Continued from page 11 123rd, Kirkland, WA 98033, (206) ★ ★ ★ 821-9263, introduces its new high per­ Brufen Products, Box 334B. Elgin, MN formance carburetor for .65 engines. It 55932 is pleased to announce the release manship, is very evident. Although I am was developed for the high stress, of its new "Galaxie III” display case not personally a Ukie speed flyer, I look competition environment of the racing kits. Expertly designed and engineered forward to seeing his models fly in the model boat. Its body is heat treated in sparkling clear acrylic plastic, they will coming months. aircraft alloy aluminum made to fit a compliment your masterpiece and keep What else? What else? The fifth photo­ back plate bore of .550 (OPS). It can be it dust free. graph . . . that’s what else. It is truly a sleeved to other sizes. The carb’s barrel The new and unique fabrication pro­ superbly constructed engine. As you is brass with a bore of .390. It’s made cess installed in its modern 3024 sq. ft. suspected from seeing the rocker box so that control linkage can be taken off facility enables Brufen to precision cut on top of the cylinder, it’s a four-cycle either right or left sides, top or bottom, all parts to whatever size you require. engine. If you turn the photo upside to suit individual needs. Fuel intake can Four simple steps (no cutting, grinding, down, the name on the top is Enya. also be rotated 360 degrees to fit your or sanding) complete the assembly. Each Guys, it’s an Enya .90 four-cycle. Al­ requirement. kit is shipped complete with all neces­ though I only had it in hand for a day or As with all Metal Concepts products, sary items and illustrated instructions. two, I showed it to half a dozen model­ your satisfaction is guaranteed, or your Expertly cut and smoothly shaped ers. Their unanimous opinion can be money back. Price is $39.95 plus $2.50 bases and stands are also available in summed up as, “ Gads, I wish I had one!” mailing and handling. (Washington either walnut or basswood, ready for More about four-cycle engines in a residents please add sales tax.) light sanding and the finish of your moment. See the April "R/C Power Boats’’ choice. These will display your model at Take a look at the last photograph. If it column of Model Builder or write to its best, whether used alone, or with the looks a bit strange, it will be more Metal Concepts for more information. Galaxie III display case. obvious as soon as you recognize that it’s ★ ★ ★ Brufen Products invites those of you an adapter fixture for two engines If you are into racing on or off-road who require something special or un­ mounted in a Vee position. Made by R/C cars you should know about the usual in a display, to send them a sketch Rossi, it will readily mount any Rossi many fine products from Bo Link, 420 for a quotation. engine from a .61 to an .81. You can’t Hosea Rd., Lawrenceville, CA 30245, Send $1 for the Brufen Products help but realize that there are many manufacturers and distributorsof quality booklet and price sheet for a host of possible applications for it in our hobby. model car racing accessories. exciting new ideas guaranteed to set M oki, Enya, Rossi mount? Where can Here are just three of the many your display ideas on fire! · you get them, or information about outstanding accessory items and com­ them? Try contacting Condor Hobbies, petition hardware items available from 17835 Skypark Circle, Suite E, Irvine, CA Bo Link. 92714. Their telephone number is (714) First, take a look at the photo of the Bo 957-1331. Link off-road speed control unit. Bo Back to four-cycle engines. . . How Link’s “ Digger 10” speed control is would you like to be able to buy a 3.5 cc

MAY 1983 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 89 cut a hole in the inside of the sponson, H 7PI»I0 1 a K i VINTAGE B-G FLANS and then hollow out a compartment in ENDURANCE RUBBER MODELS the foam. He fashioned coverplates THE “EASY B" THE TIME MACHINE' PENNY from sheet aluminum, and uses gasket material to create a seal when the coverplates are in position. Small sheet metal screws are used to hold the cover­ 9 FT. WING SPAN plates in position. Adding or removing ALL RIBS a FULL FORMERS SHOWN ON PLANS 11 weight is a simple process, and it cer­ PLASTIC FNG.COWLS * 9 .9 0 PR. tainly is more pleasing to the eye than CLEAR GUN BUSTERS * 6.60 PR the stick-on weights that most of us use. 4 large PLAN SHEETS — P l a n s $ 1 6 9 5 Don’t misunderstand me ... stick-on 6 f t . WING SPAN MODEL P B Y -5 A weights work fine, but they certainly do ENGINE COWLS ( 6 .50 PR. P | a n S $ 1 2 9 5 little to improve the appearance of a GUN BLISTERS t 4.50 PR ADD * £ s o POSTAGE THE SLOWPOKE Sp»n 16 boat. CATALOG-OVER 50 PLANS *100 DEALERS WRITE ______. Jim used K&B Super Poxy undercoat WORLD H ý WIDE and paints to finish the Hotshot 45. He w»ghl 2 Ptnnv» Q- v Plame P»op SID MORGAN said there were very few pinholes or 13157 ORMOND,BELLEVILLE , MICH.48III u.sjl blemishes that needed filling prior to * * * STARSHIP applying the paint. Prior to painting any V& · Full Size Plana putty, and the surface can be block- • Full Size Prop Jig fiberglass boat, wash it thoroughly with • Picture Illustrated' sanded flat. thinner (of the same type as used to thin • Ultra Light Balsa Appearance-wise, the most notice­ • Mini Bearing the paint itself) to remove any substance • Micro Washers able difference between the wooden kit that might be on the hull. It is somewhat • Pirelli Rubber and the fiberglass Hotshot 45 is the difficult to see pinholes and blemishes in cowling. And this isn’t a really notice­ clear resin hulls. However, after apply­ able difference. There is a difference in ing a layer of undercoat, such things the method of installing the radio equip­ become much more visible. Jim’s Hot- ment between the fiberglass and the shot 45 is painted mostly white, with K&B wooden hull. In the wooden boat, the metallic blue used on the cowl and deck. radio equipment is installed in a forward STARSHIP *3»5 Trim tape was used to accent the paint compartment under the area of the scheme. driver. The ’glass version employs a Jim and I have had our two boats out INDOOR MODEL AIRPLANES by Law Qlllow molded pan for the radio and fuel tank 46 Pgt 6 Over 100 llu itra llo n a Im print)___ FREE together, and they are very comparable Full S I» Plan ShMta lor I.M.S. Eaay "B " .. *3.95 compartments. In the fiberglass version, in speed and handling. I think my PEANUT POWER by Hannan. »0 Pga...... *6.95 the radio compartment is immediately wooden Hotshot 45 might be slightly INDOOR 8ALSA »855 P NUT BALSA PACK S6.SS aft of the driver’s cockpit. JAPANESE TISSUE In 6 Colora faster at this time. However, Jim hasn't 12 Pack *3.50 Roll ol 10 larga *5.85 The actual methods of installing the had nearly the time to work with his ROLL OF MICROLITE COVERING______*3.25 radio, engine, and fuel tank are almost CONDENSER PAPER *2.50—WASHERS *1 50 fiberglass hull as I’ve had to work with RUBBER LUBE *1.50—CEMENT *1.50 identical to those used on the wooden my wooden version. Knowing Jim like I THRUST BEARING: Now Tiny .50 Naw Dual 1.00 version. As I do with any model tunnel do, he’s going to have this fiberglass NEW MARK 1 WINDERS—16:1______*11.95 boat, I strongly urge the use of a motor NEW SMOOTHIE WINDERS —6:1______*3.95 Hotshot 45 working well by the time we 6.1 Winder only (1.95 w ith *25 Ordar mount like those available from Prather get serious about racing this season. ALL OROERS 6 KITS ADO 10% POSTAGE Products or Teague’s Model Marine. Later this summer we are looking for­ Minimum postage $1.50 Motor adjustments on tunnel hulls are ward to entering our boats in the 100-lap 16PG. CATALOG $1.00 so critical when attempting to obtain team marathon at the NAMBA Nationals optimum performance that these I BOX C, OARBERVILLÆ, CA 9S440| in Vancouver, Canada. We realize that mounts are worth the additional $25. our tunnels won't be able to match the As with any fiberglass boat, some type speed of the outrigger or monoplanes, four-cycle engine? The advance pub­ of arrangement should be made to add but we’re hoping that reliability will be licity touts that it’s just about as quiet as flotation inside the hull. I’m not sure on our side. It should be fun. an electric. That may be a slight bit of what the instructions will suggest. How­ FAMILY FEUD? exaggeration, but it’s probably true that ever, Jim Burba uses a two-part expand­ This television game show reminds me it will not generate a lot of typical ing foam to fill the inside of the spon­ of what happens at model boating complaints about noise. As this is written sons. Sig Products has a two-part foam events when family members get in­ in late January, the information available that will work very well for this applica­ volved in racing activities. I’ve witnessed is that the first production models tion. It is also possible to fit pieces of the same scene played out at other should arrive in the United States in white sheet foam into the sponson competitive events where family mem­ about a month. The manufacturer? HP cavities. Some silicone sealer applied to bers were physically and emotionally of Austria. That same company also the foam sheets will keep them attached involved in the competition. I have even expects to market 8, 10 and 15 cc four­ to the inside of the hull. Just be certain to had firsthand experience with this cycle engines during 1983. make some type of provision for ade­ situation, as both my wife. Maren, and What else? Well, Webra also will soon quate flotation . .. fiberglass will sink! I son, Paul, have raced model boats. offer a .40 four-cycle. N ow it may be only know because I’ve had two fiberglass Maren races only occasionally, but Paul my imagination, but I have a distinct, boats sink after flipping. Luckily, I got visceral feeling that we’re about to be is getting to the point where he is doing both of them back. But I know of folks inundated with four-cyclers. .. And just as much or more racing than I am. He when I was beginning to understand the who never did find sunken fiberglass turned 11 in February, and has been two-cycle . . . Well, at least you read it models. Better safe than sorry is the old racing for the last four years. here first (hopefully). adage to follow here. Up until just recently, I was the only Guys, take care... · Jim did a rather interesting modifica­ one who would help Paul during a race. tion to the front inside of the sponsons. I’d start the engine, launch the boat, and As it is often necessary to add weight on then serve as pitman during his race. R/C Boats . . . Continued from page 40 the front of a tunnel boat to move the When things went well during a race it center of gravity forward, Jim decided to was a satisfactory arrangement. How­ tunnel hulls. Should there be hollow build a small compartment in the front ever, when things didn’t go right (and spots along the bottom of the sponsons, of each sponson. Having already filled that happened quite often), the rela­ they can be filled with automobile body the sponsons with foam, Jim was able to tionship sometimes became rather 90 MODEL BUILDER strained. My problem is I get just as “ pumped” helping Paul during a race as I do when I'm racing myself. My expec­ RELIABLE IDLE? NO 60 WILL tations and his abilities are not always in sync, and this has created some stressful EQUAL THE NEW 1983 MODEL situations. There are already enough stressful situations in everyday family FOX EAGLE III WITH ITS living without adding to them while we’re supposed to be having a “ mean­ IDLEMASTER HEAD. ingful, shared, father and son experi­ ence.” This past racing season, an incident happened that proved significant to Will idle reliably at 2000 RPM and both my son and myself. He flat beat me then take the throttle without in a 3.5 tunnel race. He did this with hesitation. someone else doing all the things that I'd been doing for him. This might be The Eagle III matches or surpasses compared to the “ cutting of the apron the power of the most expensive strings.” imports. Since then I have attempted to get NOW other model boaters to help Paul during REDUCED TO The Eagle III is rugged enough to his races. Typically, I'd start the engine, withstand the loads of a Davis $94.95 Diesel conversion safely. launch the boat, and then get out of the »26BOO FOX EAGLE III way. It seems to me that this arrange­ SIDE EXHAUST The Eagle III out-turns all 60’s ment is paying dividends for both of us. I including the Rossi, OPS, OS, don’t think Paul feels quite the pressure and Webra on 12", 13" and 14" when someone else is helping him propellors. during a race. I find it much more enjoyable to simply watch him race Note: The new Idlemaster Head The Eagle III runs beautifully on rather than attempting to serve as his Button can be retrofitted on anything from no nitro fuel up pitman and race helper. earlier Eagle II and Eagle III. to 30% nitro. Model boating does offer an oppor­ tunity for families to share an activity. Ugly to look at...Beautiful to fly However, it can also present opportuni­ #26543-S Head Button — $10.00 The 1983 Model FOX Eagle III ties for problems to arise if careful attention is not paid to the relationships between family members during the MANUFACTURING CO. activity. From my observations, I would Our Hot Line (501) 646*1656 FOX 5305 I0WS0N AVE FORT SMITH ARK 72901 estimate that over half the “ family racers” I’ve observed exhibit consider­ able amounts of stressful or negative differently.” think there’s something to be said for relationships. (Also known as Little I asked what some of the other sug­ making an effort to create a model that is League-itis. wrf) In almost all of these gestions were, and received the follow­ pleasing to look at. There are those who cases, the problems stem from the adult ing information: One person recom­ would contend that the only true mod­ male having a low tolerance of the mended the use of a smaller prop during elers are those who create replicas of limited abilities of his son, daughter, or the break-in period so as not to load the full-size airplanes, boats, cars, or what­ wife. The problem almost always occurs engine excessively. Another suggested ever. . . Well, let's not get into an when the adult male is attempting to the use of low nitro fuel, like 15 percent, argument about what constitutes help during the racing event. The results to be used to break-in the engine. The modeling. are heated exchanges of words between addition of a couple of ounces of castor One area that I’ve taken a little more the family members, often tears, and lots oil to a gallon of fuel during break-in was time with this year is the driver’s cockpit. of frustration. offered. However, the one item that was Close inspection of my 7.5 tunnel would I’ve been there. I'm not planning on common to all suggestions was a few reveal patches on the lifejacket of the going back. There’s always someone at runs with a rich setting on the needle. driver, black upholstery throughout, a the races that can call the race for your Breaking in a model boat engine is custom spoke driver's wheel on a alumi­ child or wife. You can still do the something that can be done while num dash with two instruments. important things like start the engine, running the boat. This isn’t the case with Granted, not one of these items will launch the boat, row after it, wipe it off, an engine used on a model airplane. make my boat go any faster. On the refuel it, and check the glow plug. But Should the engine on the model boat other hand, they won’t cause it to go any get one of your boating friends to take stop, you simply row out and get the slower either. I feel they add much to your place as helper during the actual boat. When the engine on a model the realism of racing a model of a real race. You’ll be amazed at the difference airplane stops, you have to make a boat. Making a model boat look nice can it can make in improved family rela­ landing. And should the engine stop be every bit as satisfying as making it go tionships. during the takeoff part of the flight, you fast. With a little effort it’s even possible BREAKING IN AN ENGINE can have a really bad experience. It is to come up with a nice looking, fast One of the members of the local boat better to take the time to break-in an boat. club called the other day asking my engine properly than to take the chance Jerry Dunlap, 119 Crestwood Dr. S.W., thoughts about breaking in new engines. of breaking it. Tacoma, WA 98498. · I gave him my usual suggestions .. . use OUT IN THE SHOP your regular fuel, set the needle valve at My project of recent days has been a rich setting, run the engine for 15 to 20 the repainting and detailing of my Plug Sparks. . Continued from page 44 minutes at the rich setting, and then Dumas Hotshot 45 for entry in the begin leaning the engine until it runs at Outboard Class at the Second Annual was 7-1/2 ounces. its power peak. Northwest Model Exposition in early Actually, for the price, the Apex “ That’s interesting,” he said. "You’re February. I know fixing up a model for a wasn’t a bad motor. One often won­ the fourth person I've talked to, and show isn't everyone’s idea of what ders what happened to its production. everyone seems to do things a little modeling is supposed to be about, but I No question about it, the war did stop a

MAY 1983 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 91 wind could come from the west (nor­ mally) or from the east, so flight lines ran north and south. On one side of the COVERUP! parking area, poles and pits ran parallel with Rosecrans. The telephone lines Sturdy, high quality, rich dark (I!?!), flight lines, etc., ran parallel to green vinyl-covered binders for BEECHCRAFT SKIPPER: Quarter-Scale. 90” wingspan, 1,200 sq. in. area, .90 or Western Avenue, a whole bean field your valued copies of MODEL larger engines. Plans, $18.50 away. Besides the telephone lines, there BUILDER Magazine. Gold let­ Other plans: was another hazard in the form of an old BEECHCRAFT BARON MODEL 58 2 W Scale 85 windmill in the field north of the model tering on spine and front cover. wingspan· 1000 sq in (3) 3x6 sheets $15 00 Beechcraft Fin Insignia $2 00 flying area. A perfect airplane magnet BEECHCRAFT BONANZA A36: 2*· Scale-86 just like Charlie Brown’s kite-eating wingspan· 1300 sq in (3) 3 x6V? sheets $17 50 tree!! Ah! those were the days!” Add $2.00 postage inside U.S. & Canada READERS WRITE Include $2.00 for plan rolled In tube Overseas orders add $10.00 postage Wouldn't you know it! About three Alabam a residents add 6% sales tax months after this writer was tearing his BUD CADDELL hair out (no cracks about what hair) for 1525 Badham Dr.. Dept M . Birm ingham . AL 35216 photos to accompany the write-up on 205 822-4312 the Old Timer Events held at the Lincoln, ______DEALER INQUIRIES INVITED______Nebraska Nationals, two fellows, Dean Everetts and Al Grier, sent in photos. As a matter of fact. Dean sent so many, this columnist was hard put to recognize half of the fellows. Ψ Anyway, after witnessing the sensa­ $15.98 HALF A SPACER tional flying by Olie Olson of Pond’s Dallaire, Al Grier says there is only one J ř NOSTALGIA way to beat that model. As can be seen in XV" ^ — GAS MODEL Photo No. 6, the appropriate way is One B in d e r...... $5.95 FROM THE 5 0‘s shown ... with a hammer! Three Binders . . . $15.95 * Most of the shots received from Dean Five Binders .... $25.95 Everetts were excellent. However, we MANUFACTURERS OF can only use a few at a time. Photo No. 7 RUBBER.GLIDER,AND (For more than 5, include r λ shows a long-lost modeler that this $5.00 for each additional GAS FREE FLIG H T K ITS DISTRIBUTOR AND writer hasn’t seen since winning at \ binder.) VCV V v / DEALER INQUIRIES Oshkosh with an .020 Request as de­ INVITED. signed by Frank Ehling. Weare referring, Shipping: Binders shipped in US. Ρ.Ο. BO X 5996 send stamp of course, to Art Thoms, who was im ­ by UPS only. For one hinder, add LAKE WORTH for catalog mediately identified much to the sur­ FL. 33461 S2 00. For each additional hinder', prise of Art. As can be seen, the model is add 75c. For binders shipped out­ still in great shape after all these years! side U. S.. add S3.50 for one bind­ belongs to Codding, rebuilt from an Another nice shot taken by Everetts is er. For each additional hinder, add earlier semi-gull wing design started in Photo No. 8 showing Art White cranking up his Kloud King as Frank Fisher casu­ S i.50. For A ir M ail rates overseas, New York before moving to California. Codding goes on to say, “ The kid ally holds on. Note the background: the please inquire. holding the model is unknown to me. lake surrounds the field which is actually PLEASE . All payments must be in U.S. That's me, second from the left, with located on the top of a large knoll. Up to funds, draw n on a U.S. bank. hands on my hips watching Bill Lane (our now, no one has put their model in the California residents add 6% Sales Tax club prexy) running his inverted Phan­ lake, but there is always a first time! tom engine in his Ceph gas model. I While we are at it, Photo No. 9 shows MODELS often wonder whatever happened to Bill the field to the immediate west. Outside Lane. of the trees, hay fields, corn, etc., it isn’t a BUILDER "As can be seen, the model was an bad place for retrieving in case of a fly 621 West Nineteenth St., Box 10335 excellent example to the rest o f us club away! Shown is Buck Zehr with his Super members having a mirror finish multi­ Cyclone powered Playboy. Buck did Costa Mesa, California 92627-0132 coat dope over silk covering. If you what this writer did; flew at the wrong tapped the covering with your finger, it time for lift! lot of would-be manufacturers, but sounded like sheet metal! Real tight and lust as soon as we get a few more there doesn’t seem to be much postwar hard. identifications on the rest of the photos information on this engine. "You can see the chalk lines desig­ sent by Dean Everetts, we’ll run them! THIRTY YEARS AGO, I WAS. .. nating the pits and flight line setup. The recent IMS Trade Show spon­ Gordon Codding of Kingman, Ari­ There was a parking area with old tele­ sored by Model Builder magazine zona is a veritable treasure trove of phone poles laid in a line to act as a stop turned out to be a bonanza for photos. nostalgia regarding early gas modeling for the parking slots which were chalk- Bob Oslan stopped by and gave this in Southern California. Being a member marked in neat rows. writer a shot of his gorgeous Kloud King of the Southern California Gas Model "Beyond the poles, an entrance-way as can be seen in Photo No. 10. Oslan Assn., Gordon got to know almost all the gave access to the test and assembly area needs no introduction to this column as early gas modelers. Fortunately for you, with two tables/benches (one on each his very well finished models have been the reader, he has also taken pictures of side) where all mechanics and helpers featured in this column before. that early era at Western and Rosecrans. assembled, not to mention a few side­ Of course, the model is radio con­ Photo No. 5, taken in 1939-40 at this walk supervisors, know-it-alls, and trolled as Bob no longer has those large marvelous Los Angeles area, shows the spectators. fields readily available. Actually, Bob test bench (left hand in this case as there " Spectators were not allowed beyond confided he is getting a little tired of were two) and general area, spectators, this line, as the flight lines extended shagging free flights. Well Bob, now you etc. Inspection of the photo shows the straight out from the entrance. The pits know what us old men are complaining lines for the pit areas in the background. ran all the way down the field, one on about! Haw-w! The low wing model on the left each side to allow for wind change. The Photo No. 11 is a shot of Jim Adams,

92 MODEL BUILDER the very able editor of "SAM Speaks,” who took time out to pose for a shot of his Charles Hampson Grant Twin Tractor as featured in an early 1934-35 issue of MODEL BUILDERS SUPPLIES Model Airplane News. While twin pushers are fairly easy to launch (simply push the model away from you), twin tractors are a little more 0 3 clumsy as you must hold both propellers C SPRUCE and the rear of the stick to launch. Jim I PLYWOOD COVERING SUPPLIES says it takes a bit of doing! I STALICK STRIKES AGAIN! FIBERGLASS MICRO X-ACTO A recent letter from Bob Stalick to this KEVLAR FILLERS DREMEL columnist reports that some progress GRAPHITE SAFETY EQUIPMENT STANLEY has been made on the “ Red Zephyr Project” by Erie “ Foggy” Moorhead. Bob sez that Erie has taken notice of being put on notice, and has retaliated \ 1 with some idle threats and vague prom­ ises. Action is quite slow at present, but there is always hope! More later. Bob submitted several pictures worth EPOXY TOOLS running in the column, although they are quite dated. Photo No. 12 shows the REQUEST OUR FREE MODEL BUILDERS CATALOG engine mounting arrangement on a New Ruler as constructed by that late AIRCRAFT SPRUCE & SPECIALTY CO. immaculate craftsman, Don Dodds. PO BOX 424 · FULLERTON, CALIFORNIA 92632 · (714) 870-7551 Note how the needle valve has been FIRST IN SPRUCE Second Co None in Building Supplies secured to keep the fingers from getting trimmed; this also keeps the valve out of the way of the timer. Also worth com­ Simply build directly off the plans as Many times, the action is much slower menting on is the fuel filter employed. published! when regluing a joint formerly bonded How many of you fellows use these HANDICAP REBUTTAL with Hot Stuff. things? They are great on a field full of Boy, did this writer ever stir up a Nothing to it now! If you are tired of dust and dirt. One would do well to hornet’s nest when he proposed handi­ holding the wood pieces,simply pick up study the simple, yet functional, setup of capping certain designs in the hope of your accelerator pump bottle and gently the Anderson Spitfire. encouraging lesser-known designs to be spray the stubborn connection. Voila! Photo No. 13 is another by Stalick, seen on the field. Almost instantly,a foam formsindicating picturing John Crosselo with a real neat First off, at the IMS Trade Show, this the joint is bonded. This little item will American Ace at a WMC Albany meet. columnist caught the dickens from be a real godsend at the contest when Many modelers will remember Crosselo Gene Wallock (P&W Models) for the gall you try to make field repairs with no for his Super Glider, a foam hand to even make a suggestion like that. His clean surfaces. launched glider that attracted consider­ argument is that it doesn't make any Gotta hand it to the Hunter boys, they able attention. difference what the experts fly as they are on their toes all the time! While we are talking about modelers will invariably win. True enough! But SAN DIEGO AERONEERS in the Great Northwest, we simply had to why the same monotonous models? How about a little history lesson. This run a close-up shot of Tom Alden’s Got a letter from John Sattler of San writer was struck by the way the San marvelous Scientific, Miss World's Fair Diego taking the writer to task and Diego Aeroneers have been so success­ while being wound. Photo No. 14 shows saying that I missed the point com­ fully revived. Anyone who reads the old the special winding jig and method of pletely. Instead of penalizing the model, M odel Airplane News issues between attachment to the car. Most fellows have we should be penalizing trie flyer! As 1936 and 1941 would be immediately an attachment that works off the trunk John sez, “ Make him pay dearly for his impressed by the amount of activity and latch. You won’t scratch your paint job expertise and constant winning.” Haw! news emanating from San Diego, speci­ that way! Sattler further claims that this would fically the Aeroneers. STUNT-A-THON cause a real can of worms to be opened According to George Wagner, news­ Frank Macy (Jim Walker II in disguise) which would only lead tomorehaggling, letter editor of the Aeroneers, the writes to say the Jim Walker Air Show arguing, and bickerings. In the overall Aeroneers first operated under the and Old Timer Controline Fun-Fly will picture it would accomplish nothing! name, “ The Aviation Advancement be held on October 9,1983 at Jim Walker As far as penalizing the models goes, Club” (pretty fancy handle!). This was Memorial Field (formerly Delta Field) in there are so many other good designs, the first organization devoted to the Portland, Oregon. Macy reports this like the Eastern States Gas Champ, New construction and flying of gas models. funfest is growing every year and attracts Ruler, KGS, etc., that you would end up The club started in the latter part of 1935. more and more spectators. As more doing the same thing to these designs. Of course, the first contest was won by details become available, w ew ill publish Experts are going to win, whether you Mel Anderson (1), Bill Atwood (2), and them. In the meantime, paste this date in are flying models or pitching pennies, it Joe Weathers (3). Due credit should be your hat if you like nostalgia by the doesn’t matter. given to Weathers for the first successful reams. HOT STUFF ACCELERATOR? gas model in San Diego. Of course, SAM 21 Even for a fast framer like this colum­ nothing succeeds like success, so two Received a nice shot of an Eastern nist, when he received a sample of “ Hot more meets in April 1937 and April 1938 States Gas Champ by David Saso of SAM Shot” , a cynoacrylare accelerator, the were staged by this organization. 21 (Photo No. 15). He says at half-size, it immediate reaction was, "I've got a By this time, July 1936, the club was is the greatest flying model he has had to problem with too fast cures now” . completely revamped under the name date. This 1/2A Texaco Event is the best! However, after inspection, it turns out of "San Diego Gas Model Club” . Not For readers wondering where Dave this is the greatest stuff for making those satisfied with that name, the club finally got the plans, the Gas Champ as pub­ joints stick that simply refuse to bond! adopted the name it now carries today; lished in M odel Airplane News or the This is particularly noticeable in repair "The San Diego Aeroneers” . Air Age Book are printed half-size. work where joints need to be reglued. Like all good things, the Aeroneers WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MAY 1983 93 Riverside Radio Control Club

SIXTH ANNUAL

USPJA JUDGES

A.IV!.A. SANCTIONED

EVENTS:

» SPORT AND GIANT

SCALE COMBINED

» SPORTSMAN AND

EXPERT CLASSES

» TEAM SCALE

» BEST OF ERA

A » SPECIAL: «-s t r o k e ^ SPORT SCALE

LOCATION Riverside International Raceway

15E ^ d e C a t ''0

May 21 & 22,1033

REFRESHMENT STAND

m o t e l s a n d r / v p a r k n e a r b y

REGISTRATION: B:00 A.M. SHARP

lor more information, please call DON LIEN, C/ O Í71AJ 6 Θ 9-0334

MIKE MILLER, C/MGRI7T41 B B 6-1973

make checks payable to: RIVERSIDE R/C CLUB

______4 05 5 MT VERNON AVE RIVERSIDE. CA 92507

NOTE: Only 2 mechanical options _____ (Flap and Landing gear options not

allowed, |udged as Might realism)

94 MODEL BUILDER finally dissolved in the mid-’50s when interest waned and just plain died out. For quite some time (about 25 years), the AC/DC AUTO CHARGER name of "Aeroneers” was lost to limbo. N o. 4 0 0 5 B In the fall of 1979, George Wagner, in cahoots with Don Hoyle and Leroy Brooks, hit on the happy idea of reviving THIS DELUXE HEAVY DUTY the Aeroneer name. Needing a SAM AC/DC AUTO CHARGER IS JUST PERFECT FOR SAFE. Chapter badly in the San Diego area, it RELIABLE. FAST was only natural to again revive the old CHARGING OF THE NICAD name. BATTERY IN YOUR PLANE. Surprisingly, when notices were sent BOAT OR CAR. IT HAS ALL out, 50 percent of those responding THESE FEATURES YOU were old Aeroneer members. All that ASKED FOR: was really needed was someone (or • Has adjustable rate * zero to six group of people) to exhibit some drive, amps. and spark the old club into life again. • Charges 4. 5. 6, 7. or 8 cells. Although the actual number of enthu­ - Charges 250 mahr up to 1.8 ahr siastic fliers is small, the club still con­ cells. tinues to grow on the premise that • Works from 1 IDv house current. • Works from 12v auto battery or gel model flying should be fun. Actually, cell. that is what SAM is all about!! $69.95 • Has equalizer circuit with pilot OBIT NOTICE light. This columnist just received a letter Astro Flight, Inc. • Has jacks for external voltmeter. from Gordon Codding who wrote a • Use on boats, cars, planes. 13311 Beach Ave. • Use on transmitter and receiver letter to Marge, wife of Raymond Hunter • Use for motor break in. Bowles, commiserating over Ray's death Venice, California 90291 on December 28,1982. It is so good, this (213) 821-6242 columnist simply had to reprint the letter (with some editing). "Received your notice on Ray . . . HARDWARE & sorry is hardly the right word. I went out d o c to r ACCESSORIES to find an appropriate card but there BR AVE-300 _ 7 S IZ E S simply wasn’t anything that said the i 8 t o 29 m m proper words or expressed the right sentiment. What can I say that hasn't

already been said in the American- BRASS PULLEYS WORKING BRASS English language? 3 m m TO 8 m m DtA. TURNBUCKLES " Besides, / don’t really feel Ray is OTHER PROCTOR ITEMS! -BRASS EYEBOLTS gone. I subscribe to an old idea that we -STRUCTURAL FITTINGS live on in the memories of those we SCALE · 1 / 5 STAND-OFF SCALE -INSTRUMENT HOUSINGS. 8.7 m m -P0ÚSHED FLAT STEEL 5.2 m m knew and touched. Sitting in front of me WINGSPAN - 94' ENG.-2.1 to 4.2 cu.m. RKS6ÍN6 WIPE. is a bottle o f orange dope with the label, 50 SQ. FT. ROLLED PLANS (2 SHEETS) -SPRUCE I ALUMINUM (NO SPECIAL COWL) $30.°° P.P. U.S.A. STREAMLINE STRUTS. Pico M odel Airplane Co. Everytime I see —AIRFOIL SECTION RIBS BLACK COCKPIT TRIM it, the company and the people come Send Check or Money Order to: -OLD STYLE PROPELLERS. NEOPRENE EXTRUSION C.J. WASSERMAN PROCTOR. P0. BOX 1333, LA JOLLA. CA 92038 alive. Everytime I look at my photos of 13640 S. WALL LAKE DELTON. Ml 49046 the Lockheed Vega I built, or the plans F o r specs e price on any item .call (7/4)278-9000 or send a self addressed and stamped envelope themselves, Ray and the company come C.J.M. PLANS For a complete 40page catalog, send $ 2.00 alive. This happens everytime I send out a plan of the Pico Lockheed. eastern states, has caused John Miske " Then there is the memory of the and his club members to volunteer to ESV...... Continued from page 47 original shop with that red and white run the O /T Stunt Event at the Nationals. streamlined model hanging in the win­ Rules will be the same as they have been dow (on the left side as you went in, as / for the last six years, but all questions comes with the meter to drill the project recall) and last but not least, Ray explain­ should be directed to John Miske, 415 box, and cut a couple of notches at the ing his clever use of brown gummed Clifton Blvd., Clifton, NJ 07013. ends of the box for the input and output paper tape to make cowls. On the other end (R/C and F/F), this leads to pass through, and you have a "No, he’s not gone, he's just on an writer has been engaged in telephone neat looking ESV ready to go. extended trip . . . a long visit someplace calls with Joe Beshar. Although Joe has Now for the calibration. The bottom else in good company with Clyde Austin, not yet committed himself, there is end of the meter is already calibrated by Bill Atwood, et al. every chance he will run the O/T R/C the zener, at 9.1 volts. We want the top " ‘Whatever happened to. . .V Well, and O /T F/F events at Westover. Details end of the meter to read 10.5 volts, so we he is visiting some old friends." will follow when this is confirmed. need a 10.5 volt source. This is easy, if Now, how about that! Think you Meanwhile, get your O/T models ready you have a "freebie” battery card from could put it any better! Thanks again for the 17th Annual SAM Champion­ Radio Shack, use it to get a free 9-volt Gordon! ships at La Junta, Colorado over July battery. Use a 1.5 volt flashlight battery THE WRAP-UP 19, 20, and 21. The location is great, the in series with it to get 10.5 volts (use a This year, as it now appears for the first site is out of this world, and it has good battery!). Just place the minus end time in 20 years, this columnist will be probably the best all around weather for of the flashlight cell on the plus terminal unable to attend the Nationals at West- model airplanes. Don’t miss this one. of the 9-volt battery, and you have it. over AFB in July of 1983. The main reason See you there! · Now connect the minus end of this is lack of a driving partner and the high combination to the minus lug of the cost of traveling. The 1982 trip to Massa­ meter, or to the minus pin of either the chusetts cost the pair of us $700 apiece! input or output plug. Connect the plus However, all is not lost. The rising end of the battery combination to the popularity of O/T controline stunt, plus plus pin of either plug, or to the banded the close proximity of the Nats to all end of the zener. Turn the potentio-

MAY 1983 95 cell .550 Ah pack will not have the same peak as a six-cell sub-C pack. TARTAN TWIN BABY CYCLONE They all show on the meter, and they PROP ADA CRANKCASE all show the same sort of rise, slow Eliminates drilling Ian down, and stop, so who cares if you hole in prop & 6 bolt h don’t have an exact point on the dial you can claim as being " it ’’? Because of this, I did not mark the meter in volts, and left it "as is". If you do wish to mark it in volts, assign the zero as 9 volts, and each mark as an increment of .03 volts, up to 50, as 10.5 volts. This can be handy if you 2 lengths avnilabrø*^| Fully Machines wish to use the ESV to check your trans­ short (* longer tht^j Ready to assemble, in^tuding bushing long (H longer than slandai mitter batteries, which it does very $48.50 & $1.50 postage nicely. Use either plug and an adapter to (We must know model when ordering) Available Soon* connect to the transmitter battery, and Send $ 1.50 postage Exhaust Stack. Rear Cover. Timer Bracket note the value when the transmitter is J & J Model Accessories, 2020-3 Lomita Blvd., Lomita, Calif. 90717 turned on. Hopefully, it should be 9.6 Phone: (213) 534-3400 volts or better, more than halfway up the meter. So there you are . .. you have a super meter dial until the meter reads maxi­ “ even," that is, all cells should be in battery charger for six-cell packs that mum (50). The meter is now set for a top about the same state of charge. Do this will tell you just how close you are to a reading of 10.5 volts. Now you are ready with a slow (1/10 rate), overnight trickle max charge, and a transmitter battery to go! charge, or discharge all cells individually checker too! Before you use the meter, a word to 1.0 volts. Otherwise, some cells will go Charge with an ESV, and run longer! · about troubleshooting. There is very to overcharge while others will still be little that can go wrong with it; the two undercharged. If the pack was low, the major problems could be that that meter w ill not show anything at all, if the Workbench. . . . Continued from page 6 positive and negative leads got mixed up pack is almost charged, you will see the in the wiring, or that the zener is way off needle start to move. In either case, should limit it to digit winders only.) in its rating (9.1 volts). Check all the leads once the voltage passes 9.1 volts, the CORRECTION and make sure the plus and minus leads needle will start to rise. Watch it closely In the March "O ver the Counter” , the are where they should be. Zener diodes at this point, as the charge is on the last new Ace R/C Ultra servo was described can be a problem. I have seen some that 25% or so. The needle should rise quite as having an output of over 50 inch- weren't even within 50% of their claimed steadily, and the motion should be quite ounces. The correct figure is 35 inch- value (usually they are too low). So, easy to see. When the needle starts ounces, which is still no slouch! one last check. Connect the 9-volt slowing down, the charge is almost BIG FOX battery to the meter as before, plus to done, and when it stops rising, the Just received word from Duke Fox that the plus pins or banded end of the charge is done and the charger should he intends to produce a 3 cubic-inch zener, and minus to the minus pin of a be turned off. airplane engine, which will be available connector or to the minus lug of the If you are conservative, turn the by late spring. To be modestly priced, meter, and see if the needle on the charger off once you see the rise slow the engine will have several advantages meter moves. It shouldn’t move at all, or, down. How far the needle goes to the over the currently popular “ chain saw” if it does, it should move only slightly right depends on a lot of things, so the units. (one mark on the dial or less). If it does rate is the most important item, not "The motor incorporates two sym­ pass this test, and the meter was ad­ some “ magic ideal” point at which you metrical crankcase counterweights justed to its maximum in the previous expect it to stop. A cold battery will which completely eliminate the rocking steps, the zener is OK. charge to a higher voltage than a warm motion of some of the motors on the Now for charging! Plug in the charger, one, i.e., the needle will get farther to market today, and this also reduces the and the battery pack, and start the the right. Once the pack has been flown reciprocating vibration to lower than charge. Be sure your charging battery is or run once, it warms up, and the peak average levels.” good. If it decides to go downhill during will be lower. The brand of the pack Duke also enclosed an outline draw­ the charge, the meter will not rise! This matters too; a Sanyo pack will charge to ing of the engine, which indicates could lead to overcharging your motor a lower voltage than a G.E. pack. Even several other features. The engine is pack. The motor pack should also be the capacity makes a difference. A six­ designed for beam mounting (3-1/2 inches to bolt hole centerlines), but a motor mount w ill also be available for YES-SIR YES-SIR, THREE BA0S FULL! radial mounting (3-1/2-inch square bolt pattern). A small diameter magneto mounts on the rear of the engine, and ή . ™ B a g Af t / o y u the carb is in the conventional model engine location, all of which should allow the engine to fit into more typesof I aircraft without unsightly protrusions. Firewall to back of propeller is 7'4inches. ¥ Weight of the engine less radial ^Λ/ne. MUne>€R. or Ρβ-ice. I mount is expected to be 4-1/2 pounds, WALT MOONEY NOW OFFERS 4 BAGS OF PEANUT SCALE PLANS and it should develop about four horse­ a l l w e l l TESTED OESiGNS, AT ONLY fSOO EACH power. e a c h b a g f e a t u r e s f o u r t e e n p e a n u t p l a n s . G-MARK 03 HINTS ONE OTHER, PLUS PHOTOS AND INFORMATION Bill Cannon forwarded the following notes from Don Stephens. Oklahoma SENO ♦ 1 . 0 0 FOR COMPLETE LISTING AND SAMPLE PLAN TO: City, regarding some of his experiences WALT MOONEY, 2*12 CABRILLO MESA OR with the G-Mark .03 engine, distributed SAN OlEGO, CALIFORNIA *2123 M in the U.S.A. by Cannon R/C Systems. "Dear Mr. Cannon,

96 WHEN CONTACTING ADVtRTISbRS. TELL EM MODEL BUILDER SENT YOU! MODEL BUILDER INDEX TO ADVERTISERS

Ace R/C, Inc...... 64 Repla-Tech International...... 70 Aeronautics, Inc...... 75 Dick Hanson Models...... 70 Satellite C ity ...... 65 Aircraft Spruce & Specialty Co...... 93 Hobby Horn...... 72 Shamrock Competition Imports...... 66 American R/C Helicopters...... 71 Indoor Model Supply ...... 90 Sig Mfg. Co., Inc...... 4,5 Associated Electrics...... 67 J & J Model Accessories ...... 96 Francis Smith's Ship Yard...... 68 Astro F light...... 95 K & B Manufacturing...... 89 Southern Sailplanes ...... 79 Bavarian Precision Products...... 76 K & S Engineering...... 79 SR Batteries...... 86 Beehive R/C Model Aircraft Co...... 66 Kustom Kraftsmanship...... 84 Tatone Products...... 78 Byron Originals ...... 73,Cover2 Leisure Electronics...... 1 Taylor-Craft ...... 72 Bud Cadell Plans...... 92 McDaniel R/C Service...... 74 T & D Fiberglass...... 80 Campbell's Custom Kits...... 92 Midwest Model Supply...... 84 Uber Skiver...... Cover 3 Cannon R/C Systems...... 84 Model Products Corp...... 80 Buzz Waltz...... 81 C. J.M. Plans ...... 95 Model Rectifier Corp. (MRC) .. Cover 4 Westburg Plans ...... 69 Coverite...... 82 Walt Mooney Peanuts...... 96 Williams Bros...... 83 Jim Crocket Replicas...... 70 Sid Morgan Plans...... 90 Wilshire Model C enter...... 78 Davey Systems Corp...... 89 Novak Electronics...... 87 Nick Ziroli ...... 87 D. G. Products...... 88 Octura Models ...... 85 77 Products...... 88 Du-Bro Products...... 77 Peck-Polymers ...... 74,81 Electronic Model Systems...... 66 John Pond O.T. Plans...... 74 HOUSE ADS Fox Manufacturing Co...... 91 Proctor Enterprises...... 95 Binders ...... 92 Futaba Industries...... 3 Radio Controlled Models...... 86 Classifieds ...... 97 Great Lakes Model & Mold Co...... 64 R/C Scale Olympics ...... 94 Full-Size Plans...... 99-104

WANTED Royal Products. SILRON. model CLASSIFIED ADS covering material any size or color Cash or trade Orval Lloyd, 1744 Rosecrest Dr Salt Non-commercial (personal items) rate is 25 cents per word, with a minimum of $3.00. Lake City, UT 84t08 Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency discounts allowed. Remember Jim Walker's Folding Wing Inter­ All ads are payable with order, and may be for any consecutive insertion period specified. ceptor? It's coming back (plus others) in Name and address free, phone number counts as two words. Send ad and payment to: Umited Edition: an exact replica of the best MODEL BUILDER, Classified Ads, Box 10335, Costa Mesa, CA 92627. one of all For complete information send $2.00 and S.ASE to A-J Fun-Pak (Inter­ ceptor). P.O. Box 548. Oregon City, OR WANTED - OLD MODEL IGNITION EN WANTED Spark ignition model airplane 97045 GINES Paying top dollar Don Chapton. 1252 motors, parts, race cars Circa 1930-1950 Bennington Santa Ana CA (714)838-5469 Russell Stokes Rt t Box 520. Keller TX WANTED — OLD MODEL ignition engines, 76248 cars, etc Paying top dollar Bill Simpson 7413 MODEL AIRPLANES and the AMERICAN Via Lorado Rancho Palos Verdes. CA 90274 BOY: Magazine size book (160 pages) of (213)377-3532 1927-34 era "Fantastic job. Brings back SCALE SAILPLANES kits plans, documen­ memories.' Photos. Over 40 Plans Ten day tation and supplies Send $2 for illustrated SAVE and get fast dependable service Send refund $9.50 postpaid MODEL AERO PUBN . catalogue Archaeopteryx Avion Associates SASE for price list, we guarantee satisfaction Box 135. Northridge, CA 91328. Box 120 Pottstown. PA 19464 H&H Hobbies. 5385 Pisces St. S W , Canton, OH 44706 RAS-STICK 19- 40 Fun Flyer. 51" foam wing, balsa fuselage. Complete kits. $49 95 Send RAZOR BLADES, single edge industrial first money order, we pay UPS Send stamp for quality — extra sharp. 100/$4 25.200/$8 00, TISSUE PAPER (Domestic) 20"x30" sheets, picture sheet. Dealer inquiries invited GT 3 0 0 /$ 1 1 75. 5 0 0 /$ 1 9 25. 1000/$37 S0 sixteen colors, 20C sheet SASE brings MODELS, PO Box 869. Rantoul. IL 61866. postpaid in U S. Cobbie's Gifts. Postbox 2. sample of all colors Contact Bill Wilson. Box phone (217) 893-4136. Deal. NJ 07223: (201) 531 -6842 8489. Lumberton. TX 77711 (713) 246-41 77

“ I bought one of your G-Mark .03 R/C same time the crackling quit, and the keep the fire hot at idle, but this is easily engines about a year ago. I tested it engine ran as steady and smooth as any fixed with a bead of high temperature pretty carefully, because I was looking .60. I found no noticeable loss of power, silicon rubber seal where the collector for a very reliable engine of about that and the idle was drastically improved ring contacts the cylinder, and where size to power a B-24 I’m building. Your . . . very smooth and steady. the muffler halves fit together. I hope engine worked out very well, and I "I believe a shim washer or spacer you continue to distribute these en­ recently ordered three more of them about .020" to .030" between the bottom gines. I just read about someone using through Campbells Hobbies. of the cylinder and the crankcase four Cox .049s in a Guillows B-17 kit. I "D uring the tests, I came across some (actually about the distance the bottom believe your G-Mark ,03s would work as interesting things I thought you might of the piston is above the bottom of the well or better, and I may just find out." like to know about. exhaust port at TDC) will improve the AMA HAS MOVED "The engine, so far, has never run on overall performance and reliability of It’s hard to believe that anyone in the any higher nitro fuel than Sig 10%. Based these engines. I found, also, that there model aircraft hobby doesn’t know it by on experiments with a Cox TD .049 with was no noticeable change in noise level now, but just in case this is the first Tarno throttle, using both the Sig fuel nor idling reliability without the muffler, model magazine or other communica­ and Cox fuel, I’m sure the .03 will do as the engine was when I received it, tion media you’ve come across in the even better on the Cox fuel. because compared to the exhaust past two to three months, AMA head­ "O ver the years, I have often won­ volume on an engine of this size, any quarters has moved from its old address dered why 1/2A engines ‘crackle’ when very small leak between the cylinder and of the past 47 years. they run. When the cylinder of my collector ring is a lot of leak. As of February 14, 1983, the AM A is G-Mark unscrewed about a half a turn "I found that oil and exhaust gas spew open for business at 1810 Samuel Morse while it was running, I thought the out around the collector ring in Drive, Reston, VA 22090. The new phone muffler had vibrated loose, but at the volumes, so there is no back pressure to number is (703) 435-0750. ·

MAY 1983 97 NEW ORDERING INSTRUCTIONS M O D E L 0 Price includes 3rd or 4th Class mail. For Airmail or First Class in U.S., add 25% of total order. For Over­ seas Airmail (includes Canada and Mexico), add 50% BUILDER of total order. Remit by International Money Order All Full Size plans purchased from MODEL BUILDER or U.S. funds on Overseas orders. Postage paid for Magazine include a reprint of the construction article, if APO and FPO orders. Master Card or VISA accepted. building instructions were part of the article. Include card number, expiration date, and signature. SEND TO: MODEL BUILDER PLANS SERVICE Add 5% to credit Card orders. Minimum order. $5.00 BOX 10335, COSTA MESA, CALIFORNIA 92627-0132 CALIFORNIA RESIDENTS ADD 6% SALES TAX

No. 782-C.P. J-3 CUB $2.00 Να 5831 PLEASER $4.00 No. 183-0.T. THERM ALEER $6.00 Very simple, 46” span sport R/C aircraft Beautiful streamline Cl. C gas soarer, 76" An official 1942 Piper Aircraft Corp. LU Stinson gull type wing. By Dan Veronica. for 05 electric power. By Stan Wilson. plan for 25" span rubber scale model. No. 12821 GRIFFIN III $3.75 No. 5832 R/C COMET CLIPPER $5.00 Mini full-house R/C sport aircraft, only No. 782-0.T. MOFFETT WINNER $3.50 O Roy Nelder's most functionally beautiful Goldberg's rubber powered Clipper scaled 28-inch span, .03 power. By Bill Cannon. to 54", for .09 - .15 R/C. Stu Richmond. 1940 winner, from Nov. 1940 A ir Trails. No. 12822 G R IF F IN V I $4.00 No. 583-0.T. SHRIMPO S-3 $4.00 No. 6821 DUCKLING S3.50 > Sharp little 44-1/2" span cabin gas model Mini full-house R/C sport aircraft, only All sheet wood R/C flying boat for mini K from Nov. 1937 M.A.N. Malcolm Abzug. 36-inch span, .06 power. By Bill Cannon. radio and .02-.049 engine. Ken Willard. No. 4831 FRANKLIN SPORT $9.00 No. 1282-O.T. DALLAIRE SPTSTR $5.00 No. 6822 ASCENDER $4.00 Electric powered, 2-inch scale bi­ Reduced (81-1/2" span) R/C version of Smooth flying, trike geared, tractor can­ LU plane for 3-channel radio. Bill Gilchri popular 9-ft. old-timer. By Ron Nokes. ard. Ace foam wings. .15 .25. Skip Ruff.

No. 4831 FR A N K LIN SPORT $9.00 No. 12823 GOSS. ALBATROSS $2.00 No. 682-0.T. THE HERALD $4.50

No. 183-C.P. TA YLO R C R A FT $3.00 No. 7822 W HITEHEAD NO. 21 $4.00 No. 282-O.T. VIRGINIA CHAMP $5.00 Capitol Model Aircraft kit plans for 30" Possible pre-Wright Bros, flyer in rubber Little-known, but sharp Class C pylon, rubber scale. Shows ribs and bulkheads. F/F, 40" span. It flies! By Ken Johnson. April ‘40 F.A.. 60" span. By Bob Little.

98 MODEL BUILDER Ν α 1821 Model Builder RAVEN $5.75 Latest in a long line of tailless R/C sail­ No. 781-0.T. BERRYLOID WINNER $5.00 No. 1280-C.P. WEDELL-WILLIAMS $3.00 planes. span 110", 2-ch. By Dave Jones. Winner of the coveted best finish trophy Plans from golden era Wanner rubber kit. at the 1938 Nationals. Harold Coovert. All ribs and bulkheads shown, 30" span. Να 182-C.P. SUPER G SHARK $i00 Να 6811 CURTISS P-40 $10.00 No. 11801 "M A M A M IA !" $9.50 An historic two-line controlled model of Latest, super-size pattern ship by leading classic lines; one of many by Vic Stanzel. Exact-outline giant/sport R/C scale for .9 0 power, 80" span. By Art Johnson. flier/designer/kit manufacturer, Joe Bridi. No. 182-0.T. HI-HO $3.50 No. 1180-O.T. FOKKER D-VIII $4.50 A 1940 convertible stick/Wakef ield; uses No. 6812 LETTERS 8. NUMBERS $1.50 Letters/numbers in round/square block, Very stable F /F flying scale ship for .23 demountable cabin/pod. By Ed Lidgard. plus proportional guide to make any size. ignition engines, 57" span. By Earl Stahl. Να 12811 XINGU S4.00 High performance F3B type sailplane of Να 681-O.T. ROCKETEER $4.50 No. 1180-C.P. FAIREY "BATTLE" $3.00 contemporary construction. Ken Stuhr. High-climbing Class C gassie from Nov. Fine proportioned 30" span rubber pow­ '38 Air Trails. By Maurice Schoenbrun. ered low-wing scale ship from Megow k it Να 12812 A.J. INTERCEPTOR $1.00 Replica of the famous Jim Walker folding No. 5811 BLANÍK L -13& L-13J $9.50 No. 10801 UDET FLAMINGO $6.75 wing catapult glider. By Dave Thornburg. Czech 2-place sailplane in 1/5 R/C scale. Easily built R/C sport scale aerobatic bi­ Optional power. Span 126". L. Houha. plane for .30·.40 power. Roland Baltes. No. 12813 SUNDAY FLYER $2.50 Easy beginner's 1/2A sport F/F. One-day No. 5812 C 0 2 BANSHEE $1.50 assembly. Ace foam wings. Ken Willard. A 40% reduction of Leon Shulman's Cl. No. 10802 OHMSICK ANGEL $3.50 A post-war gassie, for C 0 2. By Ed Toner. F/F Payload-like design for R/C and 020 No. 1281-O.T. FOLLY II $4.00 electric power, 43" spaa Randy Wrisley. Beautiful aerodynamic lines on this 6-ft. No. 581-0.T. MY SPARKY SZ00 gas job. Pic in July '37 MAN. Rod Doyle. Original design of longest running kit by No. 1080-0.T. THE S-4 $3.50 Comet. Many building hints. Ed Lidgard. Super-small gassie from 1939 M .A .N „ for .049 or Elf (!) power. Malcolm Abzug. Να 11811 WACO TAPERWING $17.95 No. 4811 NORTH STAR S4.00 Sensational 1/4-scale R/C model of Bob Military scale-like R/C twin for .15 size No. 1080-C.P. STINSON RELIANT $4.00 Lyjack's Waco. 2.5-3.5 eng. Larry Scott. engines. All wood. By Kalevi Sundquist. A 3/4" scale model from 1934 Ideal kit. Excellent plans for F /F rubber, R/C, eta No. 1181-O.T. HALF-PINT $2.50 No. 481-C.P. STINSON 105 $3.00 Tiny (24-3/4" span) pylon free flight gas Competition quality 50-inch rubber scale No. 9801 POOLBOY $4.00 model for Atom or .020. Louis Garami. kit plans by Megow. All parts detailed. Tiny (20" span) R/C biplane flying boat for .010-.020 eng., 2-ch. By Ken Willard No. 10811 HEATH PARASOL $7.50 No. 4 8 1 -0 .T. POU DU CIEL $3.00 No. 980-O.T. DOLPHIN $10.00 Lightweight quarter-scale for .60 power. Finely detailed 22-inch span rubber scale, Oct, '36 Flying Aces. By Ken Hamilton. Beautiful planked-fuselage 9‘ streamliner Span 94", two-piece wing. Bob Kitson. from 1939 M.A.N. By Thracy Petrides. Να 3811 DORMOY "BATHTUB" $15.00 No. 10812 N A V Y PT BOAT $3.00 Unusual 1/3-scale R/C (8' span) early ul­ No. 8801 FUJAVAK $5.00 Built on Dynamic's 1/2" scale, 39" fiber­ tra-light homebuilt, .4 0 .60 . Hank lltzsch. Sharp looking T-tail R/C powered glider glass hull. Gas or electric. By Art Bauer. for .049-, 15 eng., 80" span. Pavel Bosak. No. 3812 HANDLEY PAGE 0/400 $4.00 No. 10813 B U TTE R FLY ONE $1.00 F/F scale WW-I bomber, 66" span, for 2 No. 8802 SCHNEIDER CUB $6.50 This little rubber powered ornithopter 1/2A ’s. Major contest winner. B. Dennis. Famous R/C Aircraft No. 5, 3-time Nats looks like a big butterfly. Ken Johnson. winner, 6' span, .60 eng. Alex Schneider. No. 1081-C.P. N. AM ERICAN B-25 $4.00 No. 381-0.T. SUPER BUCCANEER $7.50 Most famous Antique gassie from 1937. No. 8803 POTTIER P-70-S $3.00 Miniature Aircraft Corp. 1/2” -scale kit F/F scale French homebuilt, 02 electric, plans. All printwood parts duplicated. Great for R/C. 90" spaa Bill Effinger. trike gear, 29" span, neatl By E, F ilion. Να 1081-O.T. OLD SQUARE SIDES $4.50 No. 381-C.P. WACO YQC-6 $3.00 No. 8 8 0 -0 .T. HAYSEED $4.00 Very realistic sport cabin from July '40 Super-detailed plan from Skymasters kit. Hot A/B pylon (no-window cabin) never Air Trails. Nice for R/C. John Sprague. All ribs and bulkheads accurately shown. before published, 4-ft. span. Carl Hermes. No. 2811 LIBERTY SPORT $17.75 No. 9811 SCALE EDO FLOATS $3.50 No. 7801 APPRENTICE $5.00 Designed for Sig Cub, these floats fit any Mammoth 3-1/4" scale biplane for belt- Continually popular genuine R/C trainer two-inch scale model. By George Wilson. drive 60 on up. Four sheets. Roger Stera for .19-.35 eng., 72" span. Bill Northrop. No. 9812 STINSON VOYAG ER $2.50 No. 2812 DYKE DELTA $1.50 No. 780-0.T. STRATOSPHERE $3.50 One-inch scale rubber model of classic Super-light indoor Peanut Scale model. Streamline cabin rubber ship from May design. Span 34". A.P. 'Speed' Wilson. Will fly 35-45 seconds. By Ken Johnsoa 1941 M.A.N., 36" span. By Henry Cole.

No. 981-O.T. BOOMER BUS $4.00 No. 281-O.T. HERON $3.00 No. 6801 JUNKERS J-10 $6.00 Another Henry Struck classic, from Feb. A 48" span Class A gassie from Dec. '39 Squarish low wing WW-I R/C Sport Scale 1941 Air Trails. For .19 to .29 ignition. Flying Aces. Cabin style. Frank Gagne. model for .45-.60 power. By Dick Allen.

No. 8811 MINI BIRD S4.00 No. 1811 WACO YKS-6 $6.75 No. 6802 SLICK $3.00 Two-meter version of Dave Thornburg's Classic cabin biplane in R/C Sport Scale. Pocket-size R/C stunter for 020 electric well known Bird of Time. Mark Smith. For .29 - .40 engines. By John Burns. power, 2-3 ch., 33" span. Jack Headley.

No. 881-C.P. SEVERSKY P-35 $4.00 No. 181-O.T.'32 WAKE WINNER S2.00 No. 6803 SANTA MARIA No. 10 $3.00 Miniature Aircraft Corp. 3/4"-scale kit Super-light 37" span rubber model uses Winner of 2nd Place in Wakefield at 1980 plans. All printwood parts duplicated. motor stick. Designed by Gordon Light. FAI W/C. By Paul Van Leuven, Australia.

No. 881 -Ο. T. ΤΑ IB I'S HO R N ET $7.50 No. 1812 PA U LHAN-TATIN $1.50 No. 680-O.T. STRUCK'S HO-CAT $5.00 Sal Taibi's 1940 design for Forster 99 en­ Interesting 1911 streamliner with curved Alumnus of famed '39 Lake Hopatcong gine. Span 88", chord 16", 1300 sq. in. dihedral, in Peanut Scale. By J-F Frugoli. ROW meet, predecessor to R/C Sea Cat.

No. 7811 SPINE-TAILED SWIFT $Ζ50 No. 12801 OMAC-1 $7.50 No. 680-C.P. GRUMMAN F3F-1 $4.00 Contemporary 1/2A pylon racer designed R/C Sport Scale pusher-canard executive Reprint of Miniature Aircraft Corp. plans to win. Easy glass fuse. Jim Gilgenbach. aircraft, 60 power. By Col. Bob Thacker. plus ribs and bulkheads from printwood.

No. 7812 BIG PROP CHARTS $1.50 No. 12802 AUSTER J-5 $2.00 No. 5801 F6C-1 CURTISS HAWK $9.00 Charts for determining best engine and Fine flying, 18" span rubber scale light- Navy version of P1-B Hawk in 2" R/C prop sizes for the "biggies". John Burns. plane. Double for Jumbo. Steve Gardner. precision scale. Very detailed. E. Martin.

No. 7813 GREAT EXPECTATIONS $1.50 No. 1280-0.T. STRUCK'S KGS $4.00 No. 580? GOLDEN EAGLE $4.50 West Coast/Mooney Bostonian design for So-called because proportions are KG-ish, FAI compietitive Std. Class R/C sailplane. beginner or expert. By Ernie Wrisley. but the looks are Zipper-like. Class B/C. Glass fuselage available. Tom Williams. MAY 1983 99 No. 5 80-0.T. SKYROCKET $5.00 1179 O.T. MISS PHILADELPHIA $8.00 No. 479-O.T. TLUSH M ITE $3.00 Class "C streamline gassie from Jan. ‘40 Maxwell Bassett's famed 8-ft. parasol gas From May 1938 Air Trails, a 4' span gas Flying Aces, span 62". By Larry Eisinger. model, kitted by Scientific. By MB staff. modal for Atom II) engines. Frank Tlush.

No. 4801 BRUSHFIRE $6.00 No. 10791 THE BIG STIK $12.00 No. 3791 DUSTER $7.00 Contemporary design being used by sev­ World's most popular R/C design in a new A 7/8 size "Big John" biplane for .61 en­ eral top pattern fliers. By Ken Bonnema. size (8’ΛΊ. For 2" engines. Don Anderson. gines and 4-channel R/C. Bill Northrop.

No. 4802 SUNBIRD $3.50 No.3792 MYSTERY $4.00 For the latest challenge, a 54" span hand No. 1079-0.T. PANTHER $4.00 Compact 64" span aerobatic R/C slope launch R/C glider. By Dave Thornburg. Classic low-wing kitted by Peerless, for soarer for 2-channel radio. Al Pattersnn. .19-.23 ign. eng. 46" span. Walt Schultz. No. 4803 BLACKJACK $1.50 No. 379-O.T. PRIVATEER $6.00 High aspect ratio hand launch glider for No. 10792 FIRST NIGHT $2.00 Very clean cabin design from Sept. '38 lower altitude roll-outs. Larry Sargent. Novice sport rubber ship, 24" span, OK M .A.N., 87" span. By Thracy Petrides. for P-30 event. By Godden & Moseley. No. 480-O.T. AERONCA TANDEM $4.00 No. 2791 GROSS VOGEL II S7.00 No. 1079-S5 HANKERCHIEF $2.00 Scale gassie from Feb. '42 Air Trails for Large (1700 sq. in.) plank-type R/C fly ­ Hull lines drawing for 50/800 R/C sailing Ohlsson .23. Span is 48". Ronnie Albert. ing wing, .1 9 to .60 eng. Charles Clemans. yacht. Uses Bingo sail rig. By John Hanks.

No. 3801 LES LONG'S "WIMPY" $10.00 No. 2792 C LIFFH A N G ER $3.00 No. 9791 SYNCHKUGYRO S5.00 Lightweight R/C 1/4-scale homebuilt for R/C slope soarer quickly built from Ace Twin-rotor autogyro for 2-ch. radio, .35 electric or gas. 94" span. By Le Gray. foam wings, 54" span. By Larry Renger. engine. Easy to build and fly. G. Chaulet. No. 3802 AEROSPORT "QUAIL" $2.00 No. 2793 STORM HAWK $2.00 No. 9792 CRICKET $3.00 A beginner’s rubber scale, span 26". Easy Sleek, 26" low wing sport rubber ship, Balsa profile fuse, Ac foam wing 1/2A reminiscent of late '30's. John Morrill. to build, and great flier. By Walt Mooney. quickie for 1 or 2-ch. radio. J. Headley.

No. 3803 OV-10A BRONCO $3.00 No. 979-0.T. LANZO '37 STICK $8.50 No. 2794 HALF-A SCALE RACERS $2.00 An out-of-the-rut rubber scale model for First R/C Nats winner, 4th in Famous Two-for-one plan with 'Little Mike' and expert builders. 36" span. Tom Houle. R/C series. Spans 9 ft. By Chet Lanzo. 'Shoestring' ukies. Jim & David O'Reilly. No. 380-0.T. FLAMINGO $6.00 No. 8791 SNEAKY PETE $6.50 No. 279-0.T. S/S PUSHER/CANARD $2.00 Rare old-timer appeared in 1938 JASCO Single stick, 32" pusher/canard rubber catalog, 89" span. By Roger Hammer. Contemporary .61 pattern ship. Howard Pete lines, fixed dual gear. Dick Hanson. ship from '33 M.A.N. By Harry Edsall. No. 1791 DFH-21 $4.00 No. 2801 TIPORARE $6.50 No. 879-C.P. CURTISS F-11C-4 $4.00 Top pattern ship in 1979. Flown by Dave Smaller FAI pattern ship for .15 power Reprint of Miniature Aircraft Corp. plans by top Swedish flier. Bengt Lundström. Brown at World Champs. Dick Hanson. plus ribs and bulkheads from printwood. No. 2802 JUNKERS JU-88D 1 $7.50 No. 1792 MAC'S "ROBOT" $6.00 Prize-winning C /L scale medium bomber No. 8 79-0.T .-2 CHALLENGER $4.00 Famous R/C Aircraft Series. No. 3. First easily converted to R/C. Roland Baltes. Easily-built Class 8 gassie with 50" span from May '41 Air Trails. H.A. Thomas. published in 1951 AM . Fran McElwee. No. 280-O.T. RED RIPPER $5.00 Sort of a 'squared o f" Zipper, from 7/40 No. 1793 LITTLE BIT $2.00 Flying Aces. 72" span. By Jerry Peeples. No. 7791 TURNER SPECIAL $9.00 Super-mini 24" stunter will fly on up to Roscoe's famed Thompson Trophy racer 35’ lines with Cox .010. Randy Heydon. in 2" = Γ R/C scale. Col. Bob Thacker. No. 1801 CESSNA 310 $6.00 This compact R/C scale twin spans 52" No. 1794 AVIATIK D-1 $3.00 No. 7792 PERCY $4.00 Rubber powered scale model of WW-1 and flies on .19 power. D. G. Prentice. Pulse-rudder slope glider uses panty-hose biplane fighter, span 26". Bill Noonan. egg/pod fuselage. 68" span. Jack Headley. No. 1802 DFH-23 $2.50 An .020 mini-pattern ship for 2 or 3-ch. No. 12781 GRUMMAN AG-CAT $12.00 No. 6791 CAP 20L-200 $10.00 radio. Span only 22". Bengt Lundström. Mammoth 2-1/2'.' R/C scale biplane, for Fully aerobatic large-scale low winger for 2" engines. Span 7.5'. Floyd Fitzgerald. 2 cu. in. or red.-drive engines. Jeff tracy. No. 1803 BRISTOL FLYING LAB $2.00 No. 12782 COUPE DE PLASTIQUE S3.00 An indoor rubber scale biplane from the No. 6792 LONGSTER $3.00 A proven contest winner with tube fuse­ master of obscure designs. Bill Stroman. F/F or R/C 1-inch scale 130" span) cutey lage and plastic propl Harry Steinmetz. for CO 2 . 01 0. or rubber power. Le Gray. No. 180-O.T. SUPER CLODHOPPER $3.00 No. 1278-O.T. THE "TRIANGLE" S3.00 Highly refined version of 1937 Moffet No. 679-0.T. VALKYRIE .020 $3.00 Rare Antique designed by Ehling. Used winner, from 1941 A.T. By Jim Cahill. Build this .020 Replica of Carl Goldberg's famous soaring gas model. Rudy Calvo. O&R 23. 1/2A with R/C. B. Shulman. No. 12791 A5A VIGILANTE $5.00 No. 11781 TRAVEL AIR D4D S8.00 R/C Sport Scale modern-day jet fighter No. 5791 DFH - 20 $7.50 Accurate 2-inch R/C scale model of fam­ for .40 size pusher engine. Pavel Bosak. Latest FAI pattern ship by top Swedish ous Golden Era biplane. By Bill Seidler. flier. Has built-in pipe. Bengt Lundström. No. 12792 EXCALIBER II $5.00 No. 11782 PAZMANY PL-4A $5.00 R/C tunnel-hull outboard constructed of No. 5792 DORNIER Cs 20 $2.00 Jumbo rubber scale model of VW power­ plywood, for K&B .21. By Jerry Dunlap. Contest-winning C O j scale free flight. It ed homebuilt. 56" span. Leon Bennett. takes off water every time. Walt Mooney.

No. 12793 STARDUSTER TOO $2.50 No. 579-0.T. TAYLORCRAFT $12.00 No. 10781 GUSSETS $5.00 Free flight rubber scale model of popular Quarter-scale in 1941! Famous 9-foot de­ Sporty, mid-wing, aerobatic "could-be" homebuilt bipe, 18" span. Steve Gardner. sign kitted by Miniature Aircraft Corp R/C scale, for .29 - .35's. Brad Shepherd. No. 1279-0.T. MISS TINY $4.00 No. 4791 H O LLY HAWK $3.50 No. 10782 AFTERNOON DELITE $3.00 Well known and sharp little 1938 gassie Scale-like shoulder wing sport model for Compact 54" span, highly maneuverable for .19-.23 ignition, 46". Barney Snyder. 3-channel R/C, .19 eng. Mike Hollison. V-tail R/C slope soarer. Randy Wrisley.

11791 POCKET SOARER $3.00 No. 4792 PETREL $5.00 No. 10783 ATAVIST $3.00 All sheet-balsa T-tail one or two-channel Rugged, competitive R/C sailplane with Quickly built, highly competitive, half-A 50" span glider, for .020. B. Lundström. 100” or 2-meter wing options. Jim Ealy. free flight, 252 sq. in. Bill Langenberg.

11792 CURTISS 18-T-1 $3.00 No. 4793 PELICAN $3.00 No. 1078-O.T. TLUSH'S INSP IRER $5.00 Rare tri-winged military seaplane in 3 /4 ” Far out, but well-tested F/F pusher can­ Modern construction featured in this ‘37 rubber scale, spans 24". By Bill Noonan. ard flying boat, .049-.09. Jim Fullerton. cabin ship, 78" span. By Francis Tlush.

100 MODEL BUILDER No. 10773 VOLKSPLANE $2.50 No. 9781 GREAT LAKES TRAINER $4.00 No. 34781 TORC TRAINER $6.00 1-1/2" C /L scale model of popular home- Sport scale biplane for 3-4 channels and R/C trainer combined with the nostalgia built. 36" span, .15 eng. Vern Schroeder. .19 engines, 40" span. By Bill Northrop. of old timers. Span 76". George Clapp. No. 1077-O.T. EUGENE II $2.50 No. 34782 LATHROP TRACTOR $2.00 Streamlined, retract gear Wakefield, built No. 9782 "LIVE WIRE" TRAINER $4.00 A stick fuselage rubber design out of the and flown in 1940. Design by Ed Lidgard. Famous R/C Aircraft Series, No. 2. First 1914 model building era. By Dave Stott. kit ever for R/C modeling. Hal deBolt. No. 9771 BOOMER $6-00 No. 34783 WINGS $2.00 A different, but efficient, twin-boom R/C No. 9783 R/C STEAM LAUNCH S6.00 An .020 powered biplane canard sport Standard Class sailplane. Bert Striegler. Natural finish mahogany planked 40" OA model. Stick fuselage. By Randy Wrisley. "African Queen" type. Kilburn Adams. No. 9772 BLUE BOOMER SI.50 Clever all-sheet balsa twin-boom pusher No. 9784 COBRA/KINGFISHER C/L $2.00 No. 347 8-0.T. .020 SWOOSE $2.50 for indoor or outdoor CO2 . Ray Harlan. Whip and 1 / 2A powered 2-for-1 project, An .020 Replica of a fast-climbing pylon great for young beginner. Dave Kingman. design by Jack Roeser. By Paul Marchal. No. 9773 HI DUMMY $2.50 National record holder and 1977 USFF Champs winning Pay Loader Ed Eliot. No. 3781 R/C VELIE MONOCOUPE $9.50 No. 2781 LI'L DUBLR $3.50 Light-weight 1/4-scale for belt reduction Two-for-one 1/2A R/C pylon racer and/ No. 977 O.T. "GUFF" $4.00 electric power, 90" span. Bob Boucher. or sport flier. Two wings. Brad Shepherd. Walt Good's 1938 Class ‘C gas winner, from ’40 AT. Span 72". Al Patterson. No. 8782 VEST POCK ET SE5A $3.00 No. 2782 XP 55 ASCENDER S2.00 For pulse rudder R/C, this 22" sjaan bug Rubber powered scale model of unusual uses Cox .020 Pee Wee. By Fred Angel. No. 8771 CLEOPATRA $6.00 WW II pusher/canard. By Tom Nallen. Scale-like, twin-engine R/C flying boat. No. 8783 "PHOENIX" C/L STUNT $3.00 Span 98". uses .40 engines. Pavel Bosak. Sharp looking profile C /L stunt ship for No. 2783 PEARL TRUCKER $4.00 High fterformance Class A/B gas model. No.8772 SBO "DAUNTLESS" $4.00 .29 to .36 engines. By Mike Parenteau. Oesigned for C /L Carrier or Sport Scale. Won Class A, '75 Nats. By Jerr« Murphy. Uses .40 size engines. By Roland Baltes. No. 878-0.T. .020 RECORD HOUND $2.50 Classic Henry Struck design. Could dom­ No. 2784 THE DUCKLING $2.00 No. 8773 TYRO A /2 NORDIC S2.50 inate .020 Replica class. Dave Sweeney. CO 2 or rubber powered amphibian. Slow All-balsa. Jedelsky winged competition and graceful flier. By John R. Walker. glider for FF beginners. W. Langenberg. No. 7781 "LIL QUICKIE" $5.00 R/C Form I model of George Owl's best. No. 278 O.T. REDWING $4.00 No. 877 O.T. PB-2 $7.00 All wood construction. By Hal deBolt. Class A/B cabin-type gassy by Alan Orth- Payload gas model winner from Aug. ’38 of. from 1939 Handbook. Al Patterson. M.A.N. Spans 8 feet. By Thracy Petrides. No. 7782 '30’s SPORTSTER S3.00 Small R/C parasol for ,020and mini-mul­ No. 1781 STINGER $5.00 No. 7771 OS2U "KINGFISHER" $6.00 ti or pulse rudder. Span 29” . Tom Houle. Proven Form I R/C Pylon racer. All Sport R/C Scale of famous WW II Navy built-up wood structure. George Baynes. floatplane. 48” span. By Eliot Kimble. No. 7783 GREAT SPECKLED BIRD $2.50 Unlimited rubber ship which won Mulvi- No. 1782 J.C. YATES MADMAN* S4.00 No. 7772 FLIGHT BOX S1.50 hill trophy at ’77 Nats. George Perryman. Half-A R/C (18% reduction) version of "Quick-Pit" field box especially designed famous C /L stunt ship. By Floyd Carter. for Combat. Good for all. Rich Lopez. No. 7784 "SICKLE" $2.00 FAl Combat ship with interesting mass No. 1783 FOLKERTS SK-3 $2.50 No. 7773 HOTBOX SI-50 production innovations. By Steve Fauble. Winner of Model Builder's 1977 Peanut Easily built design for new P-30 rubber contest. Flies 2 min. By Kurt Enkenhus. class. Use plastic prop. John Oldenkamp. No. 778-O.T. CURTISS ROBIN $6.00 A 1937 Sport Scale ship! From Comet No. 12771 HEIN K EL/B A K A $3.00 No. 777 O.T. NEW YORKER IV S3.00 kit, 72" span. Designed by Joe Konefes. Two WW II pseudo-scale 1/2A push-pull Frank Zaic's 1938 Stout Trophy winner, R/C twins. Ace foam wings. Ken Cashion. also for Wakefield. Patterson & Northrop. No. 6781 LOCKHEED P-38L $12.00 R/C Sport Scale, balsa and ply const., a No. 12772 DH "HAWK MOTH" $4.00 No. 6771 GIPSY MOTH $12.00 trophy winner, big, 8' span. Art Johnson. Superb rubber powered 1 inch scale (44" Exact quarter-scale (7-1/2 ft. span) R/C span) cabin monoplane. By Bill Noonan. of famous H.D. bipe. By Bill Northrop. No. 6782 PASKEY S4.00 Low-wing, trike, sport/pauern for advan­ No. 1277 3 SCOUT'S PENNYPLANE $1.50 No. 6772 SC-1 $2.00 ced flier, 42” span. .19. Randy Randolph. Excellent beginner's indoor rubber stick Slow combat ship designed for easy parts trainer. Full instructions. Jerry Murphy. replacement. Foam wing. By Phil Cartier. No. 678 3 R/C SAILING KETCH $10.00 Complete plans (4 sheets) for building an No. 1277-O.T. HURRICANE $2.50 No. 6773 PARAGON $1.00 Earl Stahl's 33" span 1940 rubber pow­ elect, aux. powered ketch. WaltMusciano. High performance outdoor hand launch ered low winger. Northrop & Patterson. glider, with O.T. stabilizer. By Ed Franz. No. 6734 BUSY B $1.50 Very thorough instructions go with plans No. 11771 LI'L GEM III $3.00 No. 677 O.T. ALL BALSA G.M. $3.00 for this competitive EZ-B. Ron Roberti. Competitive 1/4 Midget R/C pylon racer. All sheet balsa pylon-type 1 939 gassy for All wood construction. Austin Leftwich small 'C engines, 48" span. Tom Laurie. No. 678-O.T. MISS DELAWARE $5.00 Steve Kowalik's 1937 Junior Motors Con­ No. 11772 WEICK W-1A S2.50 No. 5771 POLLIWOG $3.00 sistency winner. Easy to build, 7' span. Unusual scale twin-boom pusher for CO 2 Easily-built pod-and-boom electric pow­ engine. 24" span. By Walt Mooney. ered single-channel glider. Jack Headley. No. 5781 UPTON'S BABY ACE $10.00 No. 11773 PLUTO $2.50 Exact R/C quarter-scale model of popular No. 5772 GUS $1.50 Easy-to-build profile stunt/sport/tramer homebuilt parasol. 78" span. Bob Upton. A typical stick-n-tissue rubber powered for .35 engines. 44" span. Dave Horvath. fuselage model. 24" span. John Walker.

No. 5782 MERLIN $3.00 No. 1177-O.T. INTERCEPTER $2.50 No. 577-O.T. G LA DIATOR $5.00 Single or mini-multi R/C aerobatic slope O.T. .020 Replica of famous Carl Gold­ Class C free flight from March 1941 Air soarer. Acq foam wing. By Kevin Flynn. berg design. 34" span. By Jerry Murphy. Trails, 68" span. M. Schoenbrun design.

No. 5783 RUDDER BUG $5.00 No. 10771 KRIER KRAFT $10.00 No. 4771 "MISS ARPIEM" $5.00 First in Famous R/C Aircraft series. Orig­ Large R/C sport scale model of famous A rare '38 Steve Kowalik old timer. Per­ inal 6' sjaan version. Good and Northrop. aerobatic bipe. 70" span. By Ray Nugen. fect R/C trainer, 64" span. Doc Mathews.

No. 5784 SAMURAI $3.00 No. 10772 YELOISE $2.00 No. 4772 BOX BOY $2.00 Latest FAl C/L Combat "weapon", des­ Manhattan class indoor "cabin". V-tail, This .29 powered C /L stunter built most­ igned by top competitor. Rich Lopez. and plug-in wings B>, Ronald Williams. ly of corrugated cardboard. Dave Jessee.

MAY 1983 101 No. 4773 VOLARE A/2 $2.50 No. 11762 BEARCAT $2.00 No. 6764 LI* LIGHTNING $4.00 Highly competitive 85" span Nordic A/2. Easy-to-build. all sheet balsa. 1/2A pro­ Hot Half/A-A competition F/F canard. Complex, but not difficult. Ron Roberti. file scale control liner. By Dick Sarpolus. One of many designed by Doug Joyce. No. 5761 ALBATROS S5.50 No. 477 O.T. CLOUD CHASER $1.50 No. 1176-0.T. LUSCOMBE "50" $5.50 This 30" span stick job from 1938 MAN R/C sport scale post-war German light- Scale ship from Dec. '40 F.A. Suites O.T. plane Span 74” , .36 eng. By Jeff Breece. is OT, FF trainer. Unlim. 8runo Marchi. or R/C Sport Scale. 90". Tom Mountjoy. No. 477-H SHRIKE- COPTER $2.00 No. 5762 SUPERM ARINE S-5 S3.00 Full-size parts and installation drwg. for C/L scale model of 1927 Scfineider Cup No. 10761 TRIDENT $3.00 winner. For .049 power. By Jack Bale. Tucker's Jet Ranger-Shrike conversion. Hall-A, 2-channel, R/C pusher canard. No. 3771 WACO UPF-7 $5.00 Easy to build, fun to fly Randy Wrisley. No. 576-S2 WIND $2.00 Stand-off R/C scale (1.8"=1‘) of one of the A 50/800 Marblehead yacht. Good per­ prettiest Waco biplanes. Span 54V R. Steely. No. 10762 TAMERLANE $2.50 formance in all weather. Forest Godby. FAI Combat ship for hot .15 engines, by Aeromodeller C /L editor, Dave Clarkson. No. 5763 SIMPLEX S3.00 No. 377-O.T. GAS CHAMP $5.00 Highly competitive, but easily-built A /2 The famous 1940 "Eastern States Champ" Nordic. Simple to trim. By Bob Stalick. by Russell Simmons, span 76". Al Patterson. No. 10763 MESSERSCHMITT M23b $3.00 Early lightplane ancestor of ME 109, for No. 576 O.T. SCRAM S5.00 No. 3772 DIRTY BEAVER $3.00 rubber power. Span 39". Bill Noonan. Clean Class C cabin job from July 1938 Hot Half-A combat ship for popular new Flying Aces. Span 83". Heit/Patterson. event, by MB's C/L editor. Dan Rutherford. No. 10764 BIG RED MACHINE S3.00 A /2 Nordic winner at 1975 Taft NFFC. No. 4761 WEST'NER S3.50 No. 3773 KEITH-RIDER "SUZY" $2.00 Uses NFFS tail boom. By Jim Haught. Six-tenths scale model of great old timer Winner of first Nationals based Thompson for pulse R/C. Redesign by Doc Mathews. Trophy Race for rubber scale. Tom Nallen. No. 10765 SCHWEITZER 1-26 S1.00 No. r»762 PROFILE G U A R D IA N $4.00 Scale 3-views, cross-sections and airfoils. No. 2771 SEALANDER I $4.00 Popular design for Profile Carrier event. NOT construction plans. By John Walker. Single engine R/C seaplane based on Gee A consistent winner. By Bill Melton. Bee float. 20 to 40 eng. George Wilson. No. 1076-OT CALIFORNIA CHAMP $3.00 No. 4763 VACUUM TABLE $1.50 1940 Wakefield with retract wheel, twin Dimensioned, half-size plans for easily- No. 2772 SEALANDER II $4.00 rudders, anhedral stab. Tom Engleman. Twin engine R/C seaplane based on Gee built vacuum former By Ron Williams. Bee floats. (2) 20-30 eng. George Wilson. No. 9761 SOLO S3.50 No. 4764 FLYING DIAMOND $1.50 Full-house R/C trainer, using cardboard Interesting all-sheet experimental sport No. 277-O.T. BERLINER JOYCE $6.00 tube wing spars, 19-40 eng. Stan Johnson. F/F rhomboid, for .010. By Ken Willard. Scale military bipe from 1935 mag. Span 6 ft. Great for R/C assist. Donald Evans. No. 9762 AERO 101 $2.50 No. 476-0.T.CABRULER $4.00 Rubber scale French home-built biplane. Never-before-published Class A cabin mo­ No. 2773 FOKKER TV $2.00 Spans 30-1/2" for Jumbo. Walt Mooney. del New Ruler, by designer Hank Struck. Profile scale WW I l.twin engine (.049) C /L No. 9763 MINI MISS AMERICA S1.50 bomber. Span 34-1/2". By Mike Keville. No. 3761 SEASQUARE S5.00 Indoor rubber scale model of famous OT A .19 powered flying boat for 3-channel No. 2774 OFFSPRING $2.50 gassie. Rules included. By Bob Stalick. radio. Span is 50". By George Wilson. Excellent A/1 Nordic glider. All sheeted surfaces cleverly built. By Ron Roberti. No. 976-OT WINGED VICTORY $5.00 No. 3762 FLIP S1.00 Classic and realistic gas model from 1937 Easy-to-construct, all balsa 1/2A sport/ No. 1771 CURTISS HAWK XP-23 $7.00 MAN. Radial cowl, 5' span. Joe Weathers. stunt control liner. By Dick Sarpolus. Two inch R/C scale of last biplane in No. 3763 ORCA S4.00 Hawk series. Much detail. Charley Smith. No. 976 S3 SONIC BOOM MK II $1.50 Hull lines drawing and dimensioned sail Hot FAI power model with all gadgets. No. 1772 SHOESTRING SLOW RAT $2.50 plan. Third in series. By Adrian Brewer. Sheet covered surfaces. Larry Sicuranza. Semi-scale slow rat racer for .29 to .40 No 3 7 6 -0 .T. A.T. TR A IN ER S1.50 engines. Consistent winner. Bill Melton. No. 8761 FOKKER TRIMOTOR S5.00 R/C Sport scale of famous Atlantic flier Sport rubber model from 1936 Air Trails. Good flier. 30" span. Chuck Blackburn. No. 1773 KORLA PLANKTON $4.00 Span 71". .40 engine. By George Clapp Lars Olofsson’s 1976 FAI power model No. 2761 DRAGONFLY $4.50 Won 2nd in '76 Nats A Gas. Bob Stalick. No. 876 O.T. RECORD HOUND $5.00 Shoulder-wing mono-wheeler with anhed­ R/C funship, looks like giant rubber stick ral stab. Span 72". Hank Struck design. model. Superb trainer. By Tex Newman. No. 177-O.T. SHERESHAW'S XP-3 S I0.00 Beautiful 10 ft. span twin-boom pusher. No. 2762 "KILLER" SAUCER $2.00 Left and right wing plans. Phil Bernhardt. No. 8762 JA VELIN MK. 5 $3.00 Modern Unlimited rubber design with a For C /L combat, or just attracting atten­ rolled balsa lube fuselage. Ron Roberti. tion. 22" diameter. By Howard Evanson. No. 12761 DON QUIXOTE $8.00 R/C scale model of Polish homebuilt, 86" No. 2763 AMERICAN "EAGLET" $4.00 No. 7761 TWIN OTTER S10.00 F/F scale 1930 lightplane, for rubber or span, pusher engine. Laddie Mikulasko. R/C scale twin eng. commuter transport. electric power.4 8 " span. By Tom Laurie. Span 86". ,30’s or ,40's By Roy Scott. No. 12762 STAR INTERCEPTOR $2.00 Winner of Senior 1 /2A Stunt at the 1976 No. 7762 SNIPER $2.00 No. 276-0.T. "LONG CABIN" $5.00 Nats. Two fuselage plans. Felipe Alvirez. C/L combat with variable length tubular Good looking, stable cabin gas model of boom. Unique construction. Bill Allen the 1937 era. Span 78” . Phil Bernhardt. No. 12763 "GOOD TIMES" $1.50 No. 1761 PATTERN SPITFIRE S5.00 Competition model for Rocket (Jetex) No. 7763 GYSOB $5.00 Scale-like .61 powered pattern ship flown F/F class. Easy to build. By Bob Stalick. Set new Class C record. Taft. May 1976. Span 88", .40 engines. By Ed Bellinger. at 1975 World Champs. By Tore Paulsen. No. 12764 CHEZ COUPE $2.50 No. 176-S1 MINI-MAXI II $2.00 No. 776 O.T. RASSITOOOUS $4.00 Coupe d'Hiver class rubber F/F model, An A M Y A A-Class model sailboat, with Novel canard design from '39 handbook. with balsa tube fuselage. By Ron Roberti. 1400 sq. in. sail area. By Ben Hogensen Span 60", 1/5 hp eng. By Herb Lozier. No. 1762 TEXAN 750 $5.00 No. 1276-O.T. RAMBLER $4.00 No. 6761 DFH18 S6.00 Good 72" span contest gas model from Popular Class B-C free flight, modified for Highly refined Swedish pattern ship from today's engines/rules. Jim Scarborough. 1939 Flying Aces. By Gilbert Shurman. '75 FAI R/C Champs. Bengt Lundström. No. 176 O.T. KORDA WAKEFIELD $2.50 No. 1276-S4 SOUND EFFECT $1.50 No. 6762 OLD WHITE AIRPLANE $4.00 The classic of all rubber powered comp­ Hull lines drawing and dimensional sail Sturdy, consistent, easily-built C/L stunt etition free flights. By Phil Bernhardt. plan for A-class sail yacht. Adrian Brewer. ship for .35 engines. By F ritzS Chappa. No. 11761 TRAVEL AIR RACER $4.00 No. 6763 GOTHA TAUBE $5.00 No. 12751 CLIPPER AMERICANUS $4.00 R/C Sport Scale of famous Thompson Super, 45” span. F/F scale, early WW I Composite scale R/C model of modern jet Trophy "Mystery Ship". Dale Sebring. ship, 020 electric power. Bill Stroman. airliner. Span 48", .09 eng. By Art Hall.

102 MODEL BUILDER No. 12752 FOUND S1.50 No. 675-0.T. DIAMOND DEMON $3.00 No. 11743 "C-QUELL" $5.00 Scale rubber powered seaplane of Canad­ Popular .020 Replica of Bay Ridge cabin Class B/C power model, co-designed by ian design. Span 26". 8v Walt Mooney. Cl. B job. Span 34". By Phil Bernhardt. MB's F/F Editor; 76" span. Bob Stalick. No. 12753 SOLIDIFLIER $3.00 No. 5751 FLEET BIPLANE $5.00 No. 1174-0.T. LANZO STICK $3.50 All-balsa A/1 Nordic with ribless Jedelsky Fast-building 2" Sport Scale R/C model Rubber stick winner, '40 Nats. Span 4 V . wing. Span 47". By George Perryman. of famous 1930 bipe. By Romey Bukolt. Still good in Unlim. By Phil Bernhardt. No. 1275-0.T. THE PIONEER S5.00 No. 5752 SEA FURY S3.00 No. 910741 LONE EAGLE $3.00 Earliest gas job by Ben Shereshaw. Para Semi-scale model of WW II British fight­ High performance rubber scale model Of sol. 80" plug-in wing. Bv Phil Bernhardt. er. for 1/2A R/C pylon. Jerry Holcomb. 1927 vintage monoplane. By Bob Oslan. No. 91074-O.T. BUHL PUP $6.00 No. 11751 NAVY FLYING BOAT $7.50 No. 5753 GREMLIN $2.75 Semi-scale 8 ft. span model published in "Composite" scale R/C flying boat bi­ Sharp little Half-A C/L Stunt model. Will 1936 MAN. Redrawn by Phil 8ernhardt. plane. 6 ft. span, 40-61. George Clapp. do complete schedule. By Tom Dixon. Να 8741 WOODY PUSHER $4.00 No. 11752 "TWIRP" $1-00 No. 575-O.T. MERCURY $5.00 Beginner's fuselage rubber powered ship. Easy to build 8r fly semi-scale R/C home- Designed by Ben Shereshaw, kitted by built, like C.W. Jr, .09-.15. Chris Moes. Teaches stick 'n' tissue. By Dave Gibson. Scientific. 72" span. B>< Phil Bernhardt. No. 11753 "LUNAR-TIC" $3.00 No. 4751 R/C AUTOGYRO $4.00 No. 8742 AMERICAN YANKEE $2.50 Classic-looking, high performance Half-A Semi-scale twin rotor R/C autogyro for All sheet balsa 1/2A profile C/L scale. free flight. Easy to build. Harry Murphy. .35 engines. Very stable. By Skip Ruff. Sport or Proto Profile. By Bob Sargent.

No. 1175-0.T. FOO 2-U-2 $3.00 No. 4752 OKIE BIRD $4.00 No. 8743 MACCHI MB 308 S2.00 A pre-Zipper design by Dick Obarski, re­ Red hot Class A/B free flight. Plans show Rubber scale ship for floats or trike gear. duced to .020 Reolica. bv Ron Sharpton. sub fin and rear fin types. By Jim Clem. Great flier, 26" span. By Walt Mooney. No. 10751 THE LITTLE ONE S4.00 No. 475-0.T. G.H.Q. SPORTSTER $5.00 No. 874-O.T. POWERHOUSE $5.00 Economy size, .40 powered pattern ship From July 1936 M.A.N.. also kitted by Taibi's famous design for Forster 99 ign. has rolled ply fuselage. By Dick Sarpolus. G.H.Q. By Louis Loutrel. Phil Bernhardt. Great for R/C Ο. T. By Phil Bernhardt. No. 10752 MISTER MULLIGAN S4.50 No. 3751 CURTISS F9C-2 $6.00 No. 7741 CURTISS A/12'SHRIKE' $6.00 Jumbo scale rubber model of famous Ben Navy airship-based "Sparrow Hawk" bi­ Between-wars Army attack, 1-1/2" scale. Howard racer, spans 56". Tom Houle. plane. 1-1/2" scale C/L. Charlie Smith. Combined U/C-R/C. By Charlie Smith. No. 10753 SUPER PUP S3.00 No. 3752 CALL AIR SNOWCAR $3.00 No. 774-0.T. OUT O’ SIGHT $3.50 Profile Ci'L stunt ship for .29 to .36 pow­ Radio controlled, semi-scale prop-driven Little known A/B gas, diamond fuselage, er. 42" span. Easy-built. Mike Parenteau. snow car. .30-.40 engines. Fred Sanford. pylon ship. Redrawn by Phil Bernhardt.

No. 1075-O.T. SKYLARK S4.00 No. 3753 GROOVY TUNA $3.00 No. 6741 TRIXTER BEAM S4.00 Pleasing Class A/B Louis Garami design. Top-notch Wakefield design from 1973- Popular early R/C kit model designed by Shoulder wing, 5 0 ” span. Phil Bernhardt. 1975 FAI U.S. team member. Jon Davis. Lou Andrews. Redone by Bob Aberle. No. 9751 BABY ALBATROSS S10.00 No. 375-O.T. 1936 WAKE WINNER $3.00 No. 6742 STEPHANIE’S STREAKER SI.00 Exact R/C scale model of famous Bowlus Englishman Albert A. Judge's Wakefield An easily built sheet balsa stick job for all sailplane. Span 122". Col. Bob Thacker. Cup design. Redrawn by Phil Bernhardt. beginners. Great flyer. George Perryman.

No. 9752 FIREDRAKE $3.00 No. 2751 TOP SLIDER $4.00 No. 674-0.T. RED ZEPHYR $5.00 Half-A free flight featuring fast climb, R/C Slope Racing glider. Will sport fly in One of the most famous of early kit gas flat glide, penetration. Larry Sicuranza. light winds without ballast. Ken Willard. models. Redrawn by Phil Bernhardt. No. 975-O.T. PURSUITEER $5.00 No. 2752 CUT-LESS $3.00 No. 5741 LINCOLN BEACHEY $2.00 Smart looking 1938 Pete Bowers design. Half-A R/C Pylon Racer for 2 ch. radio. Semi-scale .020 sport free flight of well Span 60", area 575. By Phil Bernhardt. Elevator and aileron. By Dave Katagiri. known early-bird stunter. By Art Reiners. No. 8751 SOPWITH TABLOID $4.00 No. 2753 FORD TRI MOTOR $3.00 No. 574-0.T. The T-D COUPE $5.00 Sport Scale WW I biplane for 3-channel Super-light rubber scale model of famous Classic high wing 1936 'C cabin gas job. radio. Span 42". .19 eng. By Chris Moes. Tin Goose. 3214" span. By Tex Newman. Span 64". Redrawn by Phil Bernhardt. No. 8752 VOLKSPLANE $2.00 No. 275-O.T. MYSTERY MAN $6.00 No. 4741 GLENN'S "T" $6.50 Great performing rubber powered profile Famous Elbert Weathers Class C gas job. Graceful 12' T-tail R/C soarer. All wood scale. Span 24". By John Oldenkamp. Used takeoff dolly. By Phil Bernhardt. framework. By Glenn Cunningham.

NO. 8753 FRITZ. HLG $1.00 No. 1751 R/C TYRO TRAINER $3.50 NO. 4742 CESSNA AW $3.50 A pylon style, high performance HLG, Powered glider with removable .049 pow­ Jumbo scale rubber powered model of a with DT system. Different! Jim Parker. er pod/hatch. Span 74". By Hank Cohan. 1928 classic. Span 48". By Jim Adams. No. 875-O.T. -38 M OFFETT CHAMP $3.00 No. 1752 BEACH'S FLYER $2.50 No. 474-0.T. PACEMAKER S5.00 Canadian Roy Nelder's beautiful rubber Stagger-wing-bipe, canard-tracter for .049 J. L. Sadler's famous Class C low wing ship. A real classic. By Phil Bernhardt. Super-simple, but wild! By Kloth/Beach. gas model. Redrawn by Phil Bernhardt. No. 7751 LITTLE BOMB $3.00 No. 175-O.T. FLYING QUAKER $5.00 No. 3741 OSPREY 1 $5.00 Minimum area 1/2A pylon racer for two First gas model kit by Megow, 1937. Pretty R/C scale homebuilt flying boat. channel radio. By Wm. R. Nielsen, Jr. Span 7 ft. Redrawn by Phil Bernhardt. Span 70". .40 engine. By Dave Ramsey. No. 7752 THE ALIEN S2.50 No. 12741 85' HARBOR TUG $8.00 No. 3742 LITTLE GEM $3.00 Pendulum controlled flying wing pusher Complete plasn (3 sheets) for R/C tug. Winning QM racer from Sig Doubler kit. for Brown CO2 power. Daniel Walton. All wood, 3 7 " LOA. By Francis Smith. By Austin Leftwich and Brad Shepherd.

No. 7753 ULTRA DART $2.00 No. 12742 WACO SRE S4.00 No. 374-O.T. POWERHOUSE .020 S2.50 Monster 39" span Delta Dart for sport Big (39" span) rubber powered scale cab­ An .020 Replica of well known Sal Taibi and Unlimited Rubber. Dave Linstrum. in biplane. A classic I By George Clapp. 1938 gas model. By Gene Wallock. No. 775-O.T. BOMBSHELL $4.00 No. 12743 MOON DUST $3.00 No 2741 LITTLE TOOT $6.00 Famous winner of Class C gas at the ’40 C/L Stunt ship for .35 engines. Foam or Exact 2-1/2" R/C scale plans by designer Nats, by Joe Konefes. Phil Bernhardt. built-up wing. Span 50". By Jack Sheeks. for homebuilt bipe. By George Meyer.

No. 6751 SQUARE HARE R/C $3.00 No. 1274-O.T. THERM'L THUMBER $4.00 No. 2742 LI'L SNIP $2.50 All sheet balsa trainer with long history. Hot Class A or B pylon type gas model. Easily built 1/2A combat ship. Designed Span 52". 19 power. By 8 all Northrop. Span 48". Redrawn by Phil Bernhardt. for W .A.M . competition. By Rich Lopez. No. 6752 SKYFARER $3.00 No. 11741 CESSNA 150 $2.00 No. 274 OT PACER "C" $4.00 Rubber powered 1" scale model of trike Small R/C semi-scale for 1 to 3 channels. Sal Taibi’s famous 1941 Nats gas winner. geared high wing cabin. 8y Earl Stahl. Modified Ace foam wing. By Fred Reese. 60" span. Redrawn by Phil Bernhardt. No. 6753 SHRIKE $3.00 No. 11742 HUGHES "300" $1.50 No. 1741 WATER STRIDER $6.00 Hot Half-A free flight, with good looks, Lightweight 2 2 " rotor span, rubber pow­ Low wing, single float R/C seaplane for and top performance. Bill Langenberg. ered in-or-outdoor 'copter. Roy Foote. .60 eng. Span 75". By Bob von Koňsky

MAY 1983 103 No. 1742 BRIAN'S BULLET S2.00 No 5732 WOODWIND $3*00 No.7721 FAIRCHILD51 $3.50 Excellent competition free flight trainer A/2 glider with sturdy, warp-proof, all One inch scale Classic for R/C. also F/F for Tee Dee .020. By Loren Williams. sheet wing Span 78" By John Krouse gas or rubber By Hurst Bowers No 5733 TEA KETTLE S1.50 No. 7722 SAM 5 $3.00 No. 174-OT EHLING '37 GAS JOB _S_5.00 Twin-boom pusher for the Brown CO 2 Top-notch competition Nordic A/2 Full Frank Ehling's 8 ft. span 1937 gas model. engine Span 15" By Daniel Walton wing plan. A winner By Ron Evans Stil! winning! Drawn by Phil Bernhardt. No 573-OT 1 AERBO 020 $3.00 No. 7723 COMANCHE "C" $4.00 No. 12731 QUASOAR II $5.00 Replica of 1941 Class A Nats winner Quick and easy to build. 58" span stand­ Beautiful 12 ft. span, V-tail, R/C soarer. Span 30" Redesigned by Phil Bernhardt off scale. 40 power By Jim Sunday Spoilers and air brakes. By Niel Liptak. No 4731 BRIEGLEB BG 12 $4.00 No. 7724 TRAVELAIR '2000' $5.00 No. 12732 PULL-Q $3.00 Easily built 100” scale sailplane for slope Two inch full scale Classic R/C biplane Easily built A/1 Nordic. Span 56-1/2". or thermal soaring By Chris Christen Proven contest winner. By Jean Andrews. Proven flier, 60 power By Bill Northrop No 4732 ESPIRITU DE SAN LUIS $2.00 No. 1273 OT INTERCEPTER $2.00 No. 6721 WAKEFIELD $3.50 Single or 2-channel semi-scale using Sig An .020 Replica of popular Goldberg de­ 45" foam wing. By Dave Thornburg Highest placing U S entry in 1971 sign. kitted by Comet. By Wayne Cam. World Championships By Bob White No. 4733 PEA POD $4.50 No. 11731 BIG JOHN the FIRST $7.50 A 36” long R/C sailboat easily made of No. 6722 MONGSTER $4.00 Modified prototype of editor's notorious 1/8" Luan mahogany Clever sail control. Two inch scale quarter midget EAA type monster R/C biplane. By Bill Northrop. Full size patterns By Tom Protheroe bmlane pylon racer By Ed Nobora No. 11732 BUMBLE BEE $3.00 No. 3731 CORSAIR "F4U/C” $3.00 No. 67 2 3 CALIFORNIA COASTER S4.00 Profile scale C/L stunter for 40 engines C/L Combat ship for .35 power. Features All sheet balsa R/C soarer featuring a 9 foam wing construction. By Phil Cartier. Jig built wing. By Jack Sheeks toot Jedelsky W ing. By Mat Tenmson No. 1173-OT TRENTON TERROR $4.00 No. 3732 SATAN MK III $3.50 No. 5721 SEAHORSE II S4.00 Gas |ob from 1938 Flying Aces. Span 6'. High performance, 520 sq in Class A Excellent trainer, designed for land or Simple lines Redrawn by Phil Bernhardt. free flight By Bob Beecroft sea. 19 to 35 power. By George Wilson No. 1731 SPROOSE GOOSE $5.00 No. 5722 HUMMING BIRD S4.00 Nc, 10731 SUPER DOUBLER $4.00 EAA type R/C sport biplane, mostly Radio controlled F/F Scale early E nglish Shoulder wing, pylon racerish sport R/C spruce, for 60 engines. By Bill Northrop lightplane. .049 By Walt Mooney for .35 to .40 engines. By Brad Shepherd No. 1732 SPECTRAL $3.00 No. 5723 WHETSTONE $2.00 No. 10732 SCALE EDO FLOATS $1.50 Single channel R/C soarer, 57" span, Half-A Combat ship to sharpen your re­ Scale floats for L anzo Puss Moth or your weighs 8 oz. Easily built. Andy McAfee flexes for contests By Steve Fauble favorite ship · 22” long. By Hal Cover No. 12721 DON QUIXOTE $3.50 No. 3721 YANKEE GULL $5.00 No. 1073 OT GOLDBERG ZIPPER $4.00 An 85" span R/C glider of classic lines. Expandable R/C soaring glider with 8' Most lamous of all OT gas models, enoed Easy to build 8y Dave Thornburg 4" to 12 -0" wing span By Le Gray cabin era. Redrawn by Phil Bernhardt. No. 12722 TOAD $3.00 No. 3722 MISS COSMIC WIND $3.00 No. 9731 QUARTER MIDGET P-40 $3.00 One-design pylon racer for .40 engines. Contest winning Quarter Midget racer Easily built R/C model of famous fighter Also for sport flying. By R/C Bees Fast, easy building. By Fred Reese for racing, sport, stunt. By Jack Sheeks. No. 12723 FORTY-NINER $150 No. 3723 SIEBEL Si 201 $2.00 No. 9732 FAIman7 $3.00 Great little ail sheet balsa F/F sport rub­ All sheet balsa profile freeflight scale for Small but potent power ship for .09 eng ber model Span 24" By Dave Thornburg .020 power By Jack Headley Simple, inexpensive. By Bob Stalick No. 11721 TORKY S2.00 No. 2721 MINNOW S3.00 No. 9733 POU DU CIEL $1.50 Half A Profile Proto U-Control speed Control-line Profile Goodyear racer, Cute little all-balsa semi-scale model of model Great for Juniors By Dale Kirn "Cosmic Wind " By John Penhallow famous homebuilt CO2 By Dan Walton. No. 11722 SEAGULL $5.00 No. 2722 FOKKER E III S5.00 No. 973 OT SPOOK 48 $4.00 R/C flying boat-amohibian for 29 to WWl R/C scale for 60 engines Rudder, Well-known gull wing design qualifies for .45 engines. Span 79” By Neil Whitman elevator, and throttle By Berm Huber Antique Old Timers. By Snyder & Muir. No. 11723 SKYRAIDER AD-4B $1.50 No. 2723 E-Z BOY S3.50 No. 8731 FOKKERDVI $5.00 Rubber powered. 27-1/2 inch free-flight Half-A competition free-flight for ’72 WW I biplane fighter at 2 "» V scale for scale. Great flyer. By Walt Mooney rules and all modelers By Al Vela R/C and 40 engines. By Philip C. Foster. No. 10721 STEPHENS AKRO $4.00 No. 1721 SHOCER S4.00 No.873-OT 1931 RUBBER MODEL $3.00 R/C Standoff scale of popular aerobatic Hot Class A/B Free Flight contender for Record setting 1931 fuselage rubber job ship, for .35- 40 eng By Brad Shepherd 1972 Rules By Mel Schmidt Span 38" New plans by Phil Bernhardt. No. 10722 MINI FAI $2.00 No 1722 PUSS MOTH $4.00 No. 7731 L.I.A.H.O. $3.00 High performing .010 powered miniat­ Chet Lan2 o’s famous rubber F/F scale Trike geared pusher R/C sport plane for ure F/F. Only 24" span. Loren Williams Puss Moth returns' By Hal Cover Cox .049. Different! By -Bob Janiger. No. 9721 COLEEN-12 $4.00 No. 1723 WHITE TRASH S4.00 No. 7732 SQUARE CAT $3.00 Graceful 8 ft. V-tail soarer has stope or A proven, trophy winning R/C sailplane Easy building profile carrier C/L for 36 thermal wing plans. By Randy Warner with 7 and 10 ft. span By Rick Walters engines No gimmicks. By John James. No. 9722 BABY BOOMER $2.00 No. 12711 CURTISS-WRIGHT JR. $4.50 No. 773 OT LANZO 8- GAS MODEL $6.00 Twin-boom sport free flight pusher for Two inch scale model of famous pusher Chet Lanzo's famous "Record Breaker." .020 power. By Art Reiners light plane R/C By Ralph Fidance Two large plan sheets. By Phil Bernhardt. No. 9723 LITTLE TOOT $4.00 No. 6731 WACO YKS-6 $4.00 No. 12712 TWIN TRAINER $4.00 Semi-scale R/C bipe for .40 engines. Soon R/C model for two 30 to .50 Winner of 1972 Nationals F/F Scale Gas Great performer! By Denny Elder event Span 33-1/4". By Bill Warner. engines. By Bill Northrop No. 8721 BONZO. R/C $4.00 No. 11711 NANCY $4.00 Nr 6732 DRAGGIN" FLY $4.00 Semi-scale model of Whitman racer, for Scale-like. 96" span R/C glider featuring Lightweight R/C glider for thermal soar­ Form II, FAI. Open By Fred Steffen easy construction. By Jack Elam ing Wingspan 7 feet By Duane Hyer. No. 6733 HUNTINGTON H-12 $150 No. 8722 COUNTERFEIT. A/1 $4.00 No. 11712 BI-PRENTICE $4.00 Rubber scale model of first US home- High performance competition A/1 Nor- Training type R/C biplane for fun flying built Span 19". By Walt Mooney die flying wing glider. By Bob Provart Uses .29·.50 e.ngmes. By Bill Northrop No. 673-OT ALBATROSS $4.50 No. 8723 TAYLORCRAFT. F/F $1.50 No. 9711 BEANPATCH $4.00 Class C gas ship designed by George Rubber pc-vered. 24-inch scale seaplane. An EAA scale-like model for sport R/C Reich. Redraivn by Phil Berhardt. An excellent flyer By Walt Mooney 45 powti By Bob 'Jpton No 5731 BANTEE $3.00 No. 8724 SHOESTRING, R/C S3.Q0 No. 9712 FAIRCHILD 22 $3.00 A 19 powered mini pattern ship for 2 or Easily built Quarter Midget racer, fits Scale old-timer for single channel radio 3 channels Span 48" By John Chapis. 10% thickness rule. By Brad Shepherd or freeflight .020 power By Tom Laurie

104 MODEL BUILDER IN THE BEST CIRCLES, IT’S ttber skiver

A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER

NEW PRICES AS OF APRIL 1, 1983 • Safe, Rear Draw-Bar Clutch Available in seven satin anodized handle colors: • Precision, Instrument-Quality Materials silver, blue, red, green, gold, black, & violet. • Strong-Holding Advanced Collet Design Complete set in fitted hardwood case: includes uber Skiver, together with two vials containing • Non-Rolling Hex Cross-Section four No. 11, and one each of Nos. 10, 12, 15, • Deeply Knurled, Non-Slip Grip and 20 ...... $16.50 • Long-Life, Stainless, Individual handles (specify color) $6.95 Vial of 6 blades (No. 10, 11, or 15) $3.00 Surgical Steel Blades (No. 12 or 20) $4.00 20

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