NOVEMBER 1982 MODEL#* $2.50

BUILDER volume 12, mimSser 13® ICO 08545 P-51 Mustang 1/5 scale

[taggerwing Beech /5 scale

Christen Eagle II A 36 Beech 1 /3 scale 1/6 scale

V 35 B Bonanza 1/6 scale

F 86 Sabre Jet ^ Avail in Ο & H models (ducted tan) 1/8 scale

A 4 Skyhawk (ducted fan) 1/7 scale

T 34B Mentor General information about F 16 (ducted fan) 1/6 scale these new product re 1/8 scale leases found in catalog.

MiG 15 (ducted fan) 1/6 scale MiG-1 5 (ducted fan) 1 /6 scale

Byro-Jet ducted fan F-33A Beechcraff (for .6 0 engines) 1/6 scale

Pitts Special J / 3 scale

v Scale Realism. Pulse-Quickening Performance. 4»^. 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 1/6 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 prqduct for your money. Reach for realism. It's a mddeling e*periénce you canjt afford to pass up. For completeproduct line information, send $ 5.0Q for our new jpomprehensivre catalog., It's full of color and/B/W photos, pra wings,/product reviews and all the pertinent technical in­ Mirage (ducted fan) formation you need. Catalog price will be credited noyyards 1/7 scale k

CAP 21 1 /4 scale

CataTo^^^$5 00 ORDER YOUR (Refunded with initial purchase) CATALOG

Byron Originals, P.O. Box 279, NOW! Ida Grove, Iowa 51445. The SIXTH Annual CONSUMER TRADE SHOW JANUARY 8&9.1983 Pasadena Center, Pasadena, California HOME OF THE FAMOUS ROSE PARADE & ROSE BOWL SEE THE LATEST PRODUCTS AND VISIT WITH MAJOR MANUFACTURERS AND DISTRIBUTORS MODEL AIRCRAFT · MODEL ENGINES MODEL BOATS RADIO CONTROL SYSTEMS MODEL CARS MODELING ACCESSORIES SPECIALIZING IN RADIO CONTROL / s* '/ iont / Sa 7 7 7 ; y / / , PASADENA CENTER V / λ %////?///& 7^ holioav inn

INDOOR DEMONSTRATIONS DISPLAY COMPETITION IN MANY CATEGORIES

SEE INDOOR R/C SCALE AIRCRAFT AND BLIMP FLYING

ADMISSION: Adult admission is $3.50 per day, $Z25 for SWAP SHOP: Bring your saleable items to the Swao Shon Juniors (under 18). Weekend passes $5.00 adult or $3.00 area. NO DEALERS, PLEASE! Rent a whole taw Ä 00 Junior. Children under 9 admitted free when accompanied or half a table for $250. in addition to general admission by an a dult Discount tickets woth 50«! available at most sales ΙΜ ς η hobby shops within 500 mile radius of Pasadena. responsibleYou are responsible fo r lost orfor stolen conducting articles. your own ' MS " 0t

STATIC MODEL COMPETITION: Entry is free, open to all ages, no lim it on number of categories entered, but one en­ «WM try per category. Trophies and ribbons awarded in over 40 GIANT RAFFLE: Radio control systems kite » categories. Complete competicion rules at your local hobby wMI be raffled off Sunday afternoon. Ticket o n S ’? shop, or write/phone IMS headquarters. show. You need not be present to win. dunng

INTERNATIONAL MODELER SHOW. BOX 127. COSTA MESA NOVEMBER 1982 . CA 92627 PHONE (714)-548-4700 OR (714J-645-8830 1 M O D E L S NOVEMBER 1982

BUILDER volume 12, number 130 621 West Nineteenth St., Box 335, Costa Mesa, CA 92627-0132 Phone: (714) 645-8830

STAFF CONTENTS EDITOR/PUBLISHER Wm. C. Northrop, Jr. FEATURES GENERAL MANAGER WORKBENCH, Bill Northrop...... 6 Anita Northrop OVER THE COUNTER, John E llio t...... 7 ASSISTANT EDITOR R/C WORLD, John Elliot...... 10 John Elliot FUEL LINES, Joe Klause...... 20 ASSISTANT GENERAL MANAGER Dawn Holcomb HOW TO FLY PATTERN, Dick Hanson...... 21 DRAWINGS BY ELECTRONICS CORNER, EloyMarez...... 22 Al Patterson “ 1 TO 1” R/C SCALE, Bob Underwood...... 24 OFFICE STAFF Edie Downs CHOPPER CHATTER, Ray Hostetler...... 25 A. Valcarsel BIG BIRDS, Al A lm an...... 28 R/C SOARING, Bill Eorrey...... 31 CONTRIBUTING EDITORS Al Alman Joe Klause ELECTRIC POWER, Mitch Poling ...... 34 Jerry Dunlap Eloy Marez PLUG SPARKS, John Pond ...... 36 Bill Forrey Walt Mooney R/C POWER BOATS, Jerry Dunlap...... 42 Jim Gager Mitch Poling Bill Hannan John Pond R/C AUTO NEWS, Dan Rutherford...... 44 Dick Hanson Fernando Ramos SUPERSTABILITY (PART II), Charles McCutchen 46 Ray Hostetler Dan Rutherford Tom Huthinson Dave Thornburg HANNAN’S HANGAR, Bill Hannan...... 48 Ken Johnson Bob Underwood FREE FLIGHT SCALE, Fernando Ramos...... 55 ADVERTISING CONTROL LINE, Dan Rutherford...... 58 REPRESENTATIVES Bill Northrop FREE FLIGHT, Tom Hutchinson/BobStalick ...... 60 Home Office, Costa Mesa Al Novotnik 4 Beverly PL, Norwalk, CT 06850 Bus. Phone (203) 847-7478

CONSTRUCTION MODEL BUILDER (ISSN 0194 7079) is PEA POD MODS, KenCashion ...... 15 published monthly by RCMB INC., 621 West Nineteenth Street, Costa Mesa, Cali­ O.T. CHAMPIONSHIP STICK MODEL, Al Casano ...41 fornia 92627. Phone (714) 645-B830.

PEANUT AG CAT, HobyClay...... 49 Subscriptions: $25.00 per year, $47.00 for two years. Singlecopies$2.50. Add$3.50per MarkFineman ...... CESSNA CR-3, ...53 year for postage outside the U.S. (except FAIRCHILD RANGER “ 24” , Ace W hitm an...... 64,65 APO and FPO). U.S. funds only, please. Copyright 1982 by RCMB INC. All rights reserved. Reproduction without permis­ sion prohibited.

Change of address notices must be received six weeks before date of issue that new Cover: Ever since we first published Tom Protheroe's R/C sailboat "PEA POD", over address takes effect. Send old address with nine years ago, it has been one of our best-selling full-size plan offers. Though easy to new; old label preferred. Post Office will build, with its four-piece Luan mahogany door-skin hull, it was not considered one of the not forward copies unless you pay extra hottest 360-600 class yachts in the pond . . just a nice beginner's boat. However, Ken Cashion's modified version (How about "Mod Pod" or "Pea Souped"?), is a racing ma­ postage. Duplicate issues cannot be sent. chine that can hold its own with any boat in its class. Article begins on page 15. Second class postage paid at Costa Mesa, California, and additional offices. 2 MODEL BUILDER Contest competitors know they Futaba from draw ing board to mold • · · · ···- need all the control they can get. that base dies, these precision open gim­ i. · e · λ ίι .1 · · 3 a extra margin of control only one bals offer silky smooth action and Sport system delivers... the 7FG. sensitivity second to none. Dual mli*. mixing. \TY Our new Futaba 7FG/K has three and servo reversing " ^ controls an· located in dual rates with top panel switching Great gimbals deserve great ^ the 7 K C \ hark panel. to let you instantly adjust control sticks, so the 7FG gets knurled, non- Could there be more? surface linkages electronically (the slip alloy control sticks adjustable for How about modular RF boards. 7FG/E system uses both length and tension to give you A brand new receiver that's in a class exponential rates). just the right feel. by itself. Convenient transmitter stand and antenna storage. Even Hal pack l("s keep the our exclusive trainer system. v . " ne» K7I- receiver Kiiluhu's 7H i/K system compact, triple-tuning cun also he ordered with keeps il super selective. exponential rate i7K

KIT RC-42 Designed by - BRAD SHEPPARD $54.95 KIT RC-40 Engine: .35 - .45 LEDCSDQDCBCLEIIIQ □□ $38.50 Wing Span: 54" 4 Channel Radio CS0W7D GET INTO THE AIR FAST WITH A MOLDED FOAM WING DESIGN The models below come with Sig's own high-density foam wing, formed in one piece, ready to fly. The wing is fuelproof and needs no covering, but can be painted if desired. Tails are sheet balsa and fuselages are built up on printed balsa sides in a quick and easy assembly technique. The result is a rugged little sportster that can take the hard knocks of Sunday flying. All include the following: Die-cut plywood parts, formed aluminum landing gear, aluminum motor mounts, nylon control horns, RC links, threaded control rods, molded hinges, hardware pack of screws, blind nuts, etc. and an illustrated building and flying instruction book. In addition, the Colt and Klipper have a nose gear, nylon nose gear bearing and nylon steering arm. A formed plastic cowl is supplied with the Klipper and Super Sport. Many RC clubs have used this series for special fun-fly events because of the con­ venient size and economical price. Engine: .09 - .15 Engine: .09 - .15 Wing Span: 45” Wing Span: 45" 2 - 3 Channel Radio 2 - 3 Channel Radio KIT RC-36

Designed by - JEFF FOLEY

GS[LD[P[PC 1 [S Designed by - CLAUDE McCULLOUGH ( Β α ο ο , τ τ Every designer has favorite outline shapes and some of the familiar lines of the Kadet This scale-like (sorta-Cessna) little gem is an ideal subject to paint in full size color and Komander are mixed together in this model. Steerable nose wheel. schemes. Inspiration can be found at any airport or in aviation magazines.

Engine: .0 9 -.1 5 Wing Span: 45" 2 - 3 Channel Radio

KIT RC-45 $29.95

$29.95 Designed by · MIKE GRETZ Designed by - MIKE GRETZ Engine: .0 9 -.1 5 Wing Span: 45" g j Q D [ P S [5 2 S U P G D U n r 2 - 3 Channel Radio SG§ZÄ\DwLl[P Clean and simple lines characterize this functional design. That approach makes it a Remember the lightplanes of Aviation's Golden Age - the Cub. Champ, Taylorcraft, etc. snap to built and the wing loading can be kept to the lowest possible minimum. The Scamp is reminiscent of several of those classic lightplanes of the 1930's and 40's.

See your dealer first! To order direct, a d d $1 postage under $10, postage free over $10. No C.O.D. Send $2.00 for latest catalog of kits , accessories and supplies by SIG and other major companies. SIG MANUFACTURING CO., INC...... MONTEZUMA, IOWA 50171

MODEL BUILDER sier BUY FROM AUTHORIZED SIG DEALERS ^sig

ALABAMA GRAND JUNCTION DECATUR BOSTON LEE'S SUMMIT NORTH DAKOTA WAYNE MARSHFIELD Hyatt Hobby House BIRMINGHAM Aero Rail Hobbies Hobby Corner Eric Fuchs Hobbes Blue Hills 8 k · A Hike Inc GRAND FORKS MO Wisconsin Hobby Center Gateway Shopping Center Homewood Toy & Hobby 1141 N 25th St 737 W Pershmg Road 28 Fremont Street 229 S Main McGittms Hobbies Unlimited Northway Mali Plara 25 GLENVIEW BURLINGTON ST CHARLES 1228 9th Ave S RHODE ISLAND 503 E Ives St 2834 S 18th Street NORTH KINGS TOWN CULLMAN GRAND JUNCTION KJ I peer's Toys A Hobbes Eric Fuchs Hobbes Mark Twam Hobby A Cratt PH 701 772 5311 ME ΝΟΜΟΝ IE Hobby Hut Chaney's R/C Hobby Supplies The Hobby Hut 1314 Waukegan Road Burlington Mail 1355 S 5th WILLISTON True Value Hardware 112627 N Ave PH 312 724 2040 EAST LONGMEAOOW St. Charles Shoppmg Center C A C's R/C 7442 Post Road 1512 9 th Street 413 A 5th St SW SOUTH CAROLINA HOMEWOOD CONNECTICUT McHENRY Bars Hobby Suppl.es NE8RASKA RR 1 Boi87C L M art Shoppmg C tr GREENVILLE Homewood Toy A Hobby BRISTOL The Hobby Hangar 600 N Mam Street ELWOOD OHIO MILWAUKEE 2830 S 18th St Bristol Hobby Center Inc 5515 No Wdmot Road PH 413 7367711 Johnson Lake Manne A Hobby ASHLAND The Great Escape Casanova s Hobby MOBILE 641 Farmington Ave PH 312-497 3103 FITCHBURG R R 2 Box 43 Hobby Dispatch 1426 Laurens Road 1423 S MuskegoAve MYRTLE BEACH Dune Hobby C raft* Bristol Plaza MURPHYS80R0 McMannus H obbes A Novel LINCOLN 4? E Mam Suite 204 PH 4 1 4 6 7 2 2700 RJ Hobby A Elec Center PH 41 8 3 2 5 1 6 9 1 Ed's Hobby Shop Midtown Shopping Center PH 5 8 *7 2 7 3 633 Main St Chick Bartle tt's Hobby Town CANADA 1508 W alnut Street BERLIN HEIGHTS Hwy 501 Next to FanjOy MONTGOMERY DANBURY FRAMINGHAM 134 North 131h BAWlF ALBERTA OAKLAWN Fisher R C Daniel's Hobbies Sign Company Modelers Supply The Hobby Center NEVADA B 1 P Transport Lid Pat's Hobbies A Cratts 36 Center Street SUMMERVILLE (Ma·) Order Catalog Sales) 366 Main St 17 Salmi Road LAS VEGAS Box 6 5730 W 95 th Street HANSON BROOKVIILE FWP Hobby Shop Bo* 718S GLASTONBURY J J s Hobby Den PH 373 3953 QUINCY Hanson Hobby Country R/C 908 Bacons Bridge Road No 4 ALASKA Davis Hobbies 4972 S Maryland Parkway« CALGARY ALBERTA Fox Run Mail Quincy Hobby Center 12450 Amity Road TENNESSEE ANCHORAGE 8 » Mam St (Rt 27) NEW HAMPSHIRE Hobby W orld Canada 3632 Maine PH 293 2804 CLEVELAND KNOXVILLE Anchorage House ot Hobbies MILFORD KEENE Box 968 Stn M ROCKFORD The Hobby House. Inc Tennessee Model Hobbes 604 C Street 272 1043 Cerino’s R/C Hobbies PEABODY Leisure Time Hobbies CALGARY ALBERTA 500 New Haven Ave Rockford Hobbies, Inc. Eric Fuchs Hobbes 80 0 Huron Road Rt 62 Oak ROge Hwy Solway 4211 SpenardRd 24*2643 322 West Street P M S Hobby Craft 615 N Prospect Street Northshore Shopping Center CLEVELAND PH 615-482-2900 3521 Mt View D r 272 5651 PH 2 0 *8 7 8 1 6 0 3 LACONIA Calgary North Hilt Centre NORWALK ROCKFORD WORCESTER National Hobby. Inc NASHVILLE ANCHORACE Enc Fuchs Hobbies WINNIPEG. MANITOBA Wings A Things 5238 Ridge Road The Toy Marl Hobbyer all Inc AI's Hobbies Rays R C Specialties Laconia Man Cedar Dweller Hobby. Ltd 1122 Broadway FINDLAY U3Graytynn Drive 80 0 East Dimond Btvd 54 Chestnut Hill Road 12 Sherman St LITTLETON 1472 Mam St PH 815 963 7363 PH 757 5883 Jinx Model Supplies PH 6 1 5 8 8 * 1 6 4 8 Suite 134 WATERFORD Hobby Land PH 589 2037 URBANA 721 Rockwell Ave TEXAS ARIZONA Shoreline Craft MICHIGAN 101 Union Street WINNIPEG. MANITOBA Pastime Hobbes GREENVILLE ABILENE PHOENIX 5 Hayes S' P .0 Bo* 222 ANN AR80R ST RAT HAM Gooch’s Hobbies PH 443 1458 405 N Broadway Rider's Hobby Shop Weaver's Bikes A Hobbes The Hobby Center Exeter Hobbies Fitts Photo A Hobby Shop 646 Portage Ave FLORIDA PH 217 328 3213 115 W Liberty 222 M arkwith Ave 3421 S 1st 3285 E McDowell Rd No 9 Kings Hyway Plaza ST JOHN'S. NFLD BRADENTON WAUKEGAN BATTLE CREEK PH 5 1 3 5 4 8 1 0 3 5 ARLINGTON PHOENIX NEW JERSEY Capitol Hobby Centre. Ltd Lake County Hobbes K/RTLAND The Hobby Hub The Hobby Bench Semaphore Hobby Center Hobby House EDISON 6 Freshwater Road 1838 14th Street West 3102 N Sheridan Road 1035 W Territorial Rd Kirtland Hdw A Hobby Shop 903 A Pioneer Parkway West 19th Avenue & Northern C J R G SUPPLY DUNDAS. ONTARIO PH 312 662-4544 PH 964 9105 Rt 306 2 M.les S 190 AUSTIN PHOENIX CAPE CORAL 250 Plainfield Ave Skycratt Hobbies Inc INDIANA CLAWSON LAKEWOOD J 8 J Hobbes Hobby Bench A A J Models Inc PH (201) 985-8660 139 York Road INOIANAPOLIS Wings Hobby Shop Inc 610 Kenmston Dr Paradise Valley Mail 1928 Del Prado Btvd N « k’s Pet A Hobby FlEMINGTON SCARBOROUGH. ONTARIO Wests.de Hobby 1139 W 14 Mile Road 17112 Detroit Ave CORPUS CHRIST I 4550 E Cactus Rd FORT MYERS Hobnob Hobbes. Inc Toronto R/C Hobby Ultralight A R

NOVEMBER 1982 5 mm

N o r t h r o p ' * "When we get home Hiroshi, it’5 your tura to wash the windows.''

w o r k b e n c h I was almost tempted to propose elimination of craftsmanship judging • · · entirely, as the models are supposed to work at long range, where craftsman­ • Did you get your rules proposals for ship is (or should be) of no concern. But the 1984-85 period into A M A by Sep­ then, rewarding craftsmanship tends to tem ber 1, 1982? This was the deadline preserve the neat, fine workmanship for being serious about correcting those that is so much a part of the real hobby of rules that you've been griping about. building model aircraft. I've had one pet gripe concerning the A w hile back I said that 15 feet was judging of Sport Scale models, and I “ maybe” fine for distance judging. I guess this applies not only to R/C Sport have also proposed to eliminate the Scale, but also to Giant Scale, Sport Scale injustice of judging a three-foot span R/C Sailplanes, and also Control Line model and a 10-foot span model from Sport Scale. I’ve made the official p ro p o ­ the same center-to-outside distance. A sal for R/C Sport Scale, but perhaps I simple graduated distance-to-wingspan should also write one for each of the table has been proposed, ie, the bigger others (there’s still time as this is being the model, the further away the judges written). operate during the scoring of outline, The point is this ... all of the above finish, color, and markings. A whole model categories are judged statically bunch of concentric circles are not from 15 feet away . .. Fine (well, maybe. necessary at the judging site . . . just a Al IMovotnik, newly appointed Advertising Read on). But somehow, craftsmanship Representative for MODEL BUILDER. TOM HUTCHINSON became one of the items to be judged The relentless ravages of cancer finally string with "distance tags” attached,and ... from a distance . . . also. Judging overtook Tom, who passed away on M on­ “ Accuracy of Outline,” or “ Finish, Color day, A ugust 16, 1982, just u n d e r a m o n th staked down at the center point. Two or & Markings” is logical and correct for from his 42nd birthday. Tom has been the more strings can be made available, if Sport, alias “ S tand-O ff," alias “ Look at it Free Flight columnist for Model Builder the judges want to walk around, or if from far away” Scale, but judging crafts­ since January 1979, taking over from very there is no one available to turn the manship from a distance is ludicrous! good friend. Bob Stalick. Ironically, it is Bob m odel. Craftsmanship must be judged “ Close who has assisted us with Tom’s recent ★ ★ ★ Up” to do it properly. Craftsmanship is columns, and who will, in fact, be filling in There seems to be a lot of mixed for Tom while we locate another columnist. emotions about the “ Monster” models. not a function of authenticity, as is We offer our sincerest sympathies to accuracy of outline, finish, color, and Tom’s wife, Rosemary, and their two sons, Some are entirely against them; the markings. Any of these could be totally Mark. 7, and Michael, 5, and wish them the majority appears to be for them as long wrong on a given model, yet the crafts­ best in adjusting lo their new life. And to as size, weight, and power are treated in manship could be outstanding. To score' Tom . .. thermals. moderation; and some seem to be on an craftsmanship properly, the judge must The family requests that remembrances uncontrolled (emotionally and other­ be able to examine the model closely, be sent in Tom’s name to the Tuality wise) ego kick to see w ho can build the both to see it and feel it, if necessary. I Community Hospital, Medical Foundation, biggest, heaviest, most attention-get­ proposed this officially. Cancer Fund, Hillsboro, OR 97123. ting, etc. R/C aircraft. JOE RASPANTE In actual practice, if one judge is Word comes from Al Holmes that Joe I’m a member of the majority. scoring all three items, he can do the Raspante, designer of the classic “ Snow Although still basically in favor of the “ distance ' judging first, turn in his W hite” , passed away on July 25, at 74 years Mammoth concept (large but light­ scores to the C.D., and then move in of age, due to heart failure. We are only weight, with ,90’s or reduction drives to close to judge craftsmanship. If two or happy to report, through Al, that Joe was turn big props), the two to two-and-a- more judges are available, one can do very pleased with the Snow W hite article half cubic inch ignition powered biggies the close-up, and the other(s) can published in our August ’82 issue, just handle the distance work. barely in time for him to see it.______Con tinued on page 98

6 MODEL BUILDER OVER THE COUNTER

A ll material published in "Over the Counter" is quoted or paraphrased from press releases furnished by the manufacturers and/or their advertising agencies, unless otherwise speci­ fied. The review and/or description of any product by R/CMB does not constitute an endorsement of that product, nor any assur­ ance as to its safety or performance by R/CMB.

• Kraft Systems continue to add new items to its line of ‘Modeler-Designed’ accessories. Along with an expanding hardware line of the most popular sized items, new modeling accessory items are being developed and added, too. In the ‘Hardware’ department, Kraft Systems is now packaging engine mounting screws, with hex wrench, for 98

Sig KOBRA for .15 to .35 engines. Build either version. Both decal sets included.

NOVEMBER 1982 7 Hardened steel 6-32 hex screws from Kraft Systems. Wrench included. High-grade black neoprene tubing from Kraft. Handles any fuel. and dealers, contact Dan Lutz or Lucy The star attraction of both R/C model Skjegstad for more information on these and full scale boat racing is the unlimited fine products available from: Kraft hydroplanes, the "Thunderboats.” If Systems, Inc., P.O. Box 1268, Vista, CA you’d like to learn more about the R/C 92083, or call Dan or Lucy at (714) model versions, get "R.C.U. In Detail," 724-7146. by Les Ruggles. This 47-page book ★ ★ ★ contains over 30 illustrations and photos McDaniel R/C, the company that has of Radio Controlled Unlimiteds, along developed the Ni-Starter and the Bo- with inside info on how to build, set-up, Starter to assist in quick starting of your race, and win with these exciting model airplane, boat, or car engine, has juggernauts. been busy developing and producing Not available in stores; send check or new items to add to the enjoyment of money order for $5.95 plus 50

Wing Saddle Foam Tape from Kraft Systems. New belt-drive speed reducers for electric motors, from Astro Flight.

8 MODEL BUILDER system charger, Hi-power transmitter with open gimbal sticks, 1.15 oz. receiver, and four servos with the 4 and 5-channel systems. Other servos are optional at extra cost. Send 75c for a brochure to: Charlie's R/C Goodies, P.O. Box 192, Van Nuys, CA 91408. ★ ★ ★ Attention Sunday fliers! Do you have the high-cost-of-fuel blues and would you like to have a slightly smaller, compact sport/pattern model to fit into your small car? Then take a look at Sig’s new "3/4-scale Kougar,” the “ KOBRA.” Designed by Claude McCullough, the KOBRA can be built and finished to create either an F-16 like version, or if you prefer, the Thunderbirds T-38 Talon appearance. The kit is produced in the usual Sig manner; complete hardware package, jet type canopy with framing molded in, printed fuselage sides to build on, die-cut ribs and formers, formed landing gear, molded plastic fuselage top, full size plans and photo instruction book, plus mylar decal sets for both versions. Spanning 45 inches with 390 square inches of wing area, the KOBRA is ideally suited for .15 to .35 engines. Priced at $44.95 and it should be available as you read this. See your dealer first or order direct from Sig, postpaid. Sig Manfuacturing Co. Inc., 401 S. Front, Montezuma, IA 50171. ★ ★ ★ Astro Flight has just announced a series of improvements to its line of speed reducers, including longer output shafts to ease installation in the cowls of the 020 size to $24.95 for the 25/40 size. the price is a fantastically low $24.95 scale models and the noses of old timers See your dealer or order direct. available at your dealer, or direct. For or electric sailplanes. The longer shaft Just released by Astro Flight is its new more information on this and other has three adjustable positions to suit economy six-cell charger. The six-cell Astro Flight products, send a SASE to your installation needs. High-efficiency, charger is designed to charge all six and Astro Flight, Inc., 13311 Beach Ave., super-quiet timing belts are used in seven-cell NiCd batteries; 1200 mah, as Venice, CA 90291. place of noisy plastic gears and by using used in 1/12-scale cars,off-road, electric ★ ★ ★ belts, no rewiring of the motor is planes, and boats. This is the economy Contempo Hobby Products, manu­ required as it turns the same direction as version of the Astro line, but still retains facturers of the CAP 20L and Eagle, and the prop. The 05 reducer uses a 1/4-inch the important features you need (a Hobby outlet for the Magnum 11 engine shaft, easing prop fitting problems. Also, fifteen-minute timer to automatically for large scale model aircraft, has just the 05 unit fits Astro 05 and 075 motors, terminate fast charge and switch to the announced that arrangements have the 05 and 15 ‘Cobalts,’ and any other trickle charge mode, a quality ammeter, been concluded wherein Acmex Inter­ size 05. Reducers are available to fit and a built-in equalizer circuit for national of France, will now distribute motors from the Astro 020 through the automatically trickel charging your 25 and 40. Prices range from $14.95 for battery overnight). The best part is that Continued on page 98

Speed Stix, variable sanding grit round sticks, from Precision , Sanding Tools. New economy six-cell NiCd charger from Astro Hig 9 NOVEMBER 1982 Air Force redesignated A-26 as B-26, scratching the "Widow Maker" Steve Tilson's red and yellow "Airknocker" C-3 placed 7th in Sports­ from its rolls. This one by Parcell/Kelly team. man at Scale Squadron Regionals. %' WORLD ^ ----- JOHN ELLIOT

• Back in the early spring of this year, other than Tony LeVier,famed Lockheed R/C World ran a contest about a wild (skonk works!) test pilot and renowned aerobatic maneuver performed in a pylon polisher. Tony started off his twin-jet fighter flown by the renowned program with a sometimes humorously WW-II pilot Jan Zurakowski while he narrated slide presentation of his acti­ was a test pilot with Closter Aircraft, the vities, past and present. His stories maneuver being the ‘Zurakowski Cart­ relating to his experiences (and antics) wheel.’ Don Hambly, of Mount Hope, with the P-38 Lightning would fill a book Ontario, Canada, had responded to the with mind-boggling reading. Tony, now quiz and was kind enough to furnish basically retired, has completely some additional and fascinating history restored and now enjoys flying his about Jan. As an example, Jan once magnificent Velie Monocoupe. Tony crash-landed a Gloster Javelin and was had flown it into John Wayne Airport out of the cockpit and off the wing recently for a Concours static display, before the aircraft had even stopped! and won the 'Grand Champion' award "Head for cover, men, Lockwood's here again! According to Don, Jan had emigrated to with it. A beautiful bird. Needless to say, John's B-25 lays some eggs on M ile Square. Canada, became chief test pilot for Avro Canada, and was instrumental in testing the CF-100 and the CF-105 Arrow, later cancelled by the government. Don vividly recalls the time when Jan ejected from a CF-100 that crashed not too far from his home, leaving quite a hole in the ground. Unfortunately, theengineer didn’t, or couldn’t, make it out in time. Jan later retired and now runs a summer resort in Ontario, Canada. Interesting history . .. Thanks, Don. Along these lines, the very special guest speaker at a recent bi-monthly John Lockwood's newer and bigger B-25 settles smoothly on the deck after flight which meeting of Chapter 3, QSAA, was none included realistic bomb run shown above.

Terrific 6-cylinder in-line, built by Eldon Dwyer. Totals 3.6 cubes, uses K&B 61 top ends; turns 20 x 8 prop about 8500, weighs six pounds. Exhaust note is loud! 10 MODEL BUILDER Static show at John Wayne Airport (Orange County, Calif.) attracted Sun-glasses a necessity when looking at this polished, 1948 Cessna this rare 1930 Stearman, owned by Arthur Valdez. 195. That’s right, Mable, no struts! Belongs to Roger Readhead. local modelers had a field day with cameras gathering documentation for many a future scale project (MB has plans). Representative aircraft included such choice items as a 1930 Stearman, several ‘regular’ Stearmans in spotless civilian and military attire, a 1928 Travel- Air, a P-51A, (yes, an “ A” model), a very nice J-3 Cub, and try a gleaming Cessna 195 so highly polished it hurt your eyes to look at it. The local scale contingent was asked to provide a display of R/C scale aircraft and that they did. And, it was very well received, too. Little Osh­ kosh? No, but a first time effort, quite well done, proceeds went to a worthy charitable organization and, ‘bigger and Ed Maloney's P-51 A (yes, Ά Ί backs upscale model display personned by Diane Peterson and better' planned for next year. Bill Halpin. P-51 A seen at Planes of Fame Museum. ★ ★ ★ tom side up, and are quite inexpensive radio) prize list and the word ‘profes­ One thing about southern California (cheap is not an appropriate word) to sionalism’ has been heard. Current and a few other high density areas produce. contests, including various soaring around the country, one has to flip a ★ ★ ★ meets, have been fortunate enough to coin to decide what type of activity to Signs that our R/C hobby/sport is engage “ suds" producers as sponsors. partake of on almost any given weekend. really coming of age should perhaps, be We all know how Circus Circus has really Shall we hit a scale contest or fun-contest, reviewed lightly for the troops. Years lifted up a segment of our Hobby/Sport a Quickie 500 or Formula 1 race, or a ago, it was heard around the hobby that to new heights, and now the R/C Scale pattern meet, perhaps something to do the manufacturers of R/C equipment, as Masters has been most fortunate to be with R/C sailplanes . . . and we haven’t an example, should not (be allowed to) recognized by Datsun as a worthwhile even touched on R/C boats, or the participate in contests, as it was claimed Public Relations endeavor, witha$10,000 hottest growing thing on the west coast, an unfair advantage to others. In time, new car sweetening the kitty! R/C off-road racing. Something is going this subsided to a dull rumble, and like a This also leads up to interesting points, on, or happening, every weekend, and stomach ache, it went away. Over the again regarding competition in model­ in the case of R/C off-road racing, even years, ‘legal tender folding green’ has ing, not just RC, but the prime point in at night at lighted tracks (and don’t tell been added to the trophy (kit, engine. this dissertation. We know that many me, there’s nothing to do, as the line in that old song goes)! The same Saturday as the aforemen­ tioned full-size scale display, good friend Brian Curry, invited yours truly out for some slope soaring with his collection of variously configured flying wings. Watching Brian execute his overhead, backhand (?) launch and- away-it-goes technique with his 'wings’ was quite educational. Brian is pro­ ducing his ‘quick-wings’ out of foam, trying all kinds of airfoils, various amounts of sweepback, dihedral, wing- tip and control surface configuration, along with juggling control throw and differential. The wheel (flying wing, in this case) isn’t being re-invented, but a lot was being learned quickly, and filed away in the computer banks for later reference. Maybe Brian will treat us to a presentation of one of these 'quick- wings' soon. They fly very well, turn on a A lovely Travel Air 4000, restored by Torrance Parker. Two wings, a round engine, and open dime, some are most happy flying bot­ seats . .. what else is needed!

NOVEMBER 1982 11 ψ

Bob Frey's modified Sterling Spitfire. Scale stacks are operational. Inside of Mike Mann's Corsair wing centersection. Well organized and efficient.

Two of Brian Curry's R/C wings present odd shapes in the sky. countries have government subsidized athletes and modelers; controlline, A bit reminiscent of the Northrop flying wing, freeflight, you name it. U.S. modelers with drooped outer panels. compete in international events with assistance from the AMA and ‘out of Europe is being enjoyed? Would be neat Pretty logical way to launch a 'wing' when pocket.’ During ‘training,’ degrees of to know! On the west coast, Jim Shino- you think about it. Brian Curry. assistance are pro-offered by various hara has been heavily involved with hobby manufacturers and publications, 'Team Samuri,’ an elite group of Formula Roger providing certain guidance, i.e.; kits, radios, building materials, 1 types for several years. Quite a bit of ground support, and assistance, a for­ accessory items and travel aid, but now, help has been provided by Jim; planes, midable team is being welded together even this scene is changing by the engines, etc., in an effort to help bolster and should be well worth watching. We involvement of non-hobby industry Formula 1 racing. Jim has always liked have come a long way, fella... companies and individuals, or patrons. things that go fast and turn left. Years ★ ★ ★ In the 1st International Formation ago, he sponsored several dirt track cars July 24th and 25th saw the Scale Flying Champs report in the October for well known Indy drivers such as A.J. Squadron Regionals draw 51,yes Martha, issue, we may note that the Peter Stuy- Foyt and Johnny Rutherford. fifty-one contestants together for a vesant Cigarette Company sponsored Another area receiving the patrons 'flight to the finish’ contest in near the winning team. Simprop provided touch is R/C soaring. A gentleman by perfect, warm weather. This was the the necessary R/C systems, but there the name of Roger Roth approached first west coast contest wherein the giant was a non-hobby sponsor involved. Larry Jolly with the concept that Larry scale models competed with sport scale Interesting! How much non-industry select the talent, form and captain a on a same-rules basis. We will be seeing sponsorship of our hobby/sport in highly competitive soaring team. With more of the giant scale models compet­ ing effectively from now on. Their ‘presence’ (thank you, Dave Platt) in the air, a given subject being able to be flown more realistically and handle windy or gusty conditions, all this adds up to picking up flying points. In Sportsman, Steve Pfister, in his second contest (he was 2nd in the previously reported 4-stroke contest) won a well-deserved 1st place with his Aeronca C-3. John Bashore, Jr., flying the Don’s Custom Models Super Chip­ munk (giant scale) was second in his first contest! Better watch this young kid, guys . .. 3rd was Shane Cramer with his (giant scale) P-47. T’was the Jug’s first outing. Fourth was Mike Peck with a

12 MODEL BUILDER The Roth soaring team, equipment and personnel. Ball bearing winch motors, big Die-Hard, Honda generator. Team (I to r): Dennis Brandt, Mike Charles, Roger Roth, Larry Jolly, and Ken Nelson. OK, E.F., everybody's listening! very nicely done Sig Liberty Sport and Dick Skuglund was 5th with his Ercoupe. Inexpert, Kent “ The Cowboy" Walters did it again. What can you say except that he has done his homework. He has stayed with the same aircraft (although a different model) for years (and someone once said that a winning model should be retired after so many first places . . . nuts, let the competition get their act together), and knows it intimately, flies it extremely well, and his scale documen­ tation is excellent (I would have to give him a 10 on it. je). At this point, let me say that U.S. Navy aircraft were 1st, 2nd, 3rd, 4th, 8th, and 9th out of the first 10 places! Garland Hamilton, now a California In sunny but windy Hawaii, island of Maui, Al Tuttle's Byron Originals A4 awaits calmer conditions for first flight. resident, had an outstanding perfor­ mance with his Hellcat and netted 2nd the engine would quit. Simulated tem­ F-16 and astonished judges and spec­ spot, while being hotly pursued by the porary fuel starvation, the effect was tators alike by rotating to about a 60 Hellcat of Don Lien for 3rd. Mike Mann’s very real. .. degree climb angle and going upppp, beautiful 'bent wing bird’ was 4th (we Big Bert Baker, a last minute entry with after passing through the ‘maneuver hear rumbles of a bigger F4-U being his P-47 (giant scale and the mate to complete' portion of his takeoff. Looked developed by Mike). Jerry Ortego got Shane Cramer’s) eased into 7th ahead of great! Buzz Watson finally retired his his act together, stopped dropping his Larry Wolff's Panther Jet. Rich Meyer’s PT-22 after all these years, said it was landing gear, and brought his FW-190 Hellcat was 9th (three Hellcats in the first getting too heavy, and entered his (semi-giant) into a well-deserved 5th 10 and only one (1) P-51 in the whole super-clean Zlinn Z 50L. Will be in the spot. Chuck Fuller's big (giant scale) contest). Jerry Kitchen’s perrenial P-47 top five when Buzz gets it sorted out. PT-17 was one of the crowds favorites was 10th. It has been said that the kid (?) Bob Frey purchased a Sterling Spitfire kit with Chuck performing realistic turn­ needs a bigger airplane. Olaf? (a big seller back in the ’60s) and did a arounds (hammer-heads, etc.) duri ng his Many other new and interesting total revamp of it. Cut down the 'free- flight performance. The real pleaser was models were entered, such as John flight' stab to scale size, rounded the when, during his low inverted pass, Lockwood’s new and bigger B-25. ‘Catch fuse, installed retracts in the scale Chuck would blip the throttle on the big 22’ all over again. Harry Wood entered position, and had a scale operating Kawasaki and the crowd thoueht that his first contest with his well flown Bvron exhaust for good measure. Will be a competitive machine. Tony Arand flew a Royal B-17 in Team Scale and was good for 5th place; Boeing’s pride and joy flies very well, but a mite too fast. The Parcell/Kelly team left its B-25 at home and brought a new B-26 for its first outing. This is of the Douglas variety, bigger than the B-25 they have been competing with, and when sorted out, it will do well. Retired Commander of the Scale Squadron, Bob Olson (also caught sleeping on the job) managed to keep the landing gear in his new ME 109 for some good flights this time, to o . .. Four rounds flown, a smooth, well run con­ test, the best kind. Let's close out with a contest this month. For a one year sub to Model Builder, who invented and/or made popular, The Tennessee Waltz? And I Al Tuttle's Byron A4 w ill be the subject of a full product review, coming up shortly. don't mean ‘Tessie’ Brewer! ·

NOVEMBER 1982 13 MODEL BUILDER Pea P o « l M o d s

By KEN CASHION . . . Ever since first being published in the April 1973 issue of MODEL BUILDER, as originally designed by Tom Protheroe, the PEA POD has been one of our most popular building projects. Not meant to be the hot- est boat on the pond, it is an inexpensive and easy-to-build project for getting into R/C sailboating. Starting with this in mind, Ken went through a series of trial modifications and ended up with an inexpensive wood sailing yacht that can blow the sails off most any boat in its 36-600 AMYA class.

• It is not the purpose of this article to its was introduced by Tom Protheroe in so I already knew something about "up-date" the Pea Pod, nor is it meant to the April 1973 issue of Model Builder sailing. I also read books on designing infer that I am "correcting” the design (Plan #4733). For nine years the Pea Pod full-size yachts. Recently, our local or construction techniques. This article has been, I believe, the best beginner’s airplane modelers started “ let’s-get- discusses the modifications that I made R/C sailboat. I am talking about a into-model-yachting” talk. I was willing on my Pea Pod, which greatly improved sailboat for a model builder who wants to build a boat, but not go out and re­ its performance. You can do the same to learn about sailboating. If you want to finance my Honda and plunk down for yours. This is one of those old "hop- buy today/sail today, there are other money for a right-now, state-of-the-art up” or “ soup-up” articles we used to choices. racing sailboat. I decided if the activity read. The original Pea Pod concept and I am new to model yachting. I once built up, then I would get a more configuration are as valid today as when did a fair amount of full-size sailboating, competitive boat. If I ended up with the only boat on the pond, I wanted it to be one that I really liked (wood). I had always admired the Pea Pod's construc­ tion techniques, and knew that I would eventually build one. Because I am a competitor at heart and we would be racing. I phoned the designer, Tom Protheroe, with this basic question: Since it was designed so long ago, what would he do now to the hull, keel, bulb, or rudder to make it faster? His answer, in essence, was "Nothing.” It had gone through a thorough development pro­ cess, and if you started changing the hull, a performance gain in one area would cost you in some way somewhere else. We talked about its weight; it is heavy compared to fiberglass hulls. We talked about all aspects of the hull, and I am convinced that the hull is an opti­ mization of compromises. That means "generally as good as it is going to get.” My original intention was to build the boat as designed and learn how to sail, how to read the wind (as in sailplane flying), and learn the racing rules and tactics. But I immediately saw that the wide deck would permit the use of Lead photo shows general deck features, travelers, sheets, shrouds, and stays. This photo is travelers to good advantage. Travelers another view of deck, shows plywood doubler on bow to cover torn-out lacing holes. on the narrow deck of a modern racing

NOVEMBER 1982 15 MODEL BUILDER

I " TO ACTUAL AMYA, 9 1 9 SQ. 11' SW IVEL •2‘ MAST STEP a d d ROACH, USE SUIT Π JIBJ ADD I " TO BATTENS. p ) / V \ AREA 560 SQ." 1 -3 /* " s ^ SUIT IV '5 ' '3 ' '4‘ ' 2 ' M AST STEP (Λΐ~υ~υ~υ~ιτι

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ACTUAL

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AREA 5Θ3 SQ." AMYA 763 763 SQ."

n o n e : SAILS. LINES ON ALL ALIGNED TO THESE s c a l e WEAVE OF MAT. MUST BE

BY KEN CASHON I d r a w in g PEA POD MODIFICATIONS

BATTEN LENGTH.

0 —

— */2 NOTE'· 719 SO." ACTUAL 59 2 SQ. AMTA,

AREA SUIT SUIT I (ORIGINAL SAILS) SHEET 3 I / 4 HEM TYP. (IF NYLON, PUT SIMILAR HEM IN FOOT.)

PEA POD MODIFICATIONS SHEET 4 DRAWING SCALE'. NONE BY KEN CASHION MODEL BUILDER 18 hull would not be as effective. This started a process of converting what appeared to be racing disadvantages to advantages, or at least minimizing their effects. In the process of using the Pea Pod as a test-bed for winches (Let's stay serious, wen), sail configurations, and trim changes, I finally got that hull going as fast as it will go. I will not list all the things I tried, just the improvements. Unless stated otherwise, the construc­ tion approach and dimensions on this boat are the same as those presented on the original design. To avoid duplicating Protheroe's fine article, I have kept redundancy to a minimum. If you want to build a Pea Pod to some level of these modifications, you still have to purchase the original plan set. (See page 96) When I was designing sailplanes in Picayune, Mississippi, I was fortunate to be sharing air space with as good a sail­ plane as you could find: a Legionair being flown by a very good pilot. There­ fore, I had a good standard with which to compare my sailplane designs. The same thing has taken place with sailboats. On our pond, the "standard” is a state-of- the-art fiberglass hull,top-quality winch, fiberglass spars, and racing sails. This With hatch cover off, note winch, arm, and winch control servo. Note American Model boat design is a proven national winner Yachting Association hull registration inside hull. and the skipper is good. So when the Pea magnitudes of these points (in the case 36-600 is an American Model Yachting Pod is in a tacking war with that boat, I of two sails, jib and main) is the center- Association racing class. The specifica­ can tell if I am making the right changes. of-effort. Now this we can move, and tions state that the maximum length is 36 Now for just a little bit of sailboat where we put it is very critical to the inches and the sail area is no more than theory to introduce some words and speed of the boat in different winds. If 600 square inches by the AMYA formula. concepts . . . it will not hurt much . . . we project vertical lines from the CEand There are no roach or batten restrictions. you will understand the rationale for the CLP to the waterline, the distance More about this later.) modifications and be able to trim your between the CE waterline intersect and And now for the weight. The Pea Pod boat better. First, we need to know what the CLP waterline intersect is called weight is high, but we do not want to "center-of-lateral-plane” (CLP) means. "lead.” The CE leads the CLP by some make it lighter. The weight affects the Imagine having your sailboat hull float­ small amount, usually expressed in waterline profile and the wetted surface ing at the proper waterline as you reach percent of waterline length. We will area, etc., and if we change one param­ underwater and slowly start pushing on come back to this “ lead” anon. eter, we inadvertently change another, the side of the hull with your finger. At The hull has a "waterline profile” and eventually we end up with some­ some point on the hull, the boat will not which is the shape of the waterline (not thing that is not a Pea Pod, and this is a heel or turn, but move sideways through deck) as seen from below. People will Pea Pod article. the water. You have located the CLP. In argue by the hour about which shape is The hull has a keel which, besides the case of the Pea Pod, it doesn’t matter best, but with the Pea Pod, it should stay adding to the lateral plane area without where it is because we are not going to as it was designed. The Pea Pod waterline hindering turning ability too much, ties change it. We just need to know that it profile is far better than you might think the bulb (stabilizing weight) to the hull. has one, because the next thing we need by judging the deck width (beam). We The keel needs to develop lift to help the to understand is the "center-of-effort need to consider "wetted surface” or boat move windward. We know from (CE) of the total sail area. Each sail has a "wetted area.” That is just what it sounds control-line airplane days that wings center point which defines that place like, and we would like to keep it to a which are flat plates do not develop about which all wind pressure is equal. minimum. The wetted area on the Pea The location of the vectorial sum of the Pod is high for a 36-600 class vacht. (The Con tinued on oaae 66

ψ 0 2

MOTOR - As RECtO BATS .01 UTO. DISC CON- S i - iVINCU POWER SWITCH Q 2 - FILTER CARACITCR, 4.7 MFD. POLAR. RADIO SHACK (R S ) RS 2 7 2 - 14 2 2 2 7 5 - 4 0 6 Rl -fILTER RE?irrCRt lO OH/A, 174 WATT S 2 - SEE T E K l HS 272 - 'W D l - WINCH REVERSE OlPDE RS 2 7 6 - H 0 6

S< -MAGNETIC SW TCP, R7C POWER TO R/C R S 4 9 - 5 1 2 R/C ~ BATS. 1 Ö ,EQUIP. S5 - R/C POWER SWi-GN AGNE SWl r UŘCtf T RS 275 -406 Easily made keel ballast molds, as described in text. Wheel grease eases separation, cuts down burning. 19 NOVEMBER 1982 The Rossi .15 tuned pipe engine that has been so popular with FA I speed flyers around the w orld. Ugo Rossi holds rear exhaust version of new .61. The ,61's on table are side exhaust ver­ • It's tempting to begin this column sions of this tuned pipe engine. with, “ Recently, when I was . . Sound trite? Of course, it is, but frankly, I'm sounds vaguely familiar, it probably somewhat at a loss as to how to begin means that you are or have been an this one without using some such hack­ owner of a Rossi engine. At the very neyed expression. Anyway, since just least, you’ve seen the name imprinted about all of us commonly use such on an engine box or instruction sheet. phrasing, why be concerned? By now, you’ve surmized that I visited So . . . some weeks ago, I was in the Rossi factory in Brescia. Actually, it’s Europe. The itinerary included Italy, and in a nearby country suburb called Cella- while driving across the far northern tica, but yes, I did have the pleasure of sector, I had to (HAD to? wen) pass touring the factory and spending several through the city of Brescia. If that name hours with the Rossi brothers. All very -< Note that the new .61 piston on the left has enjoyable, and to say the least, Ugo and a smaller bore than the old style on right. Con­ siderably more power. Details in text. Continued on oape 71

The brothers Rossi; Ceasare, in plaid shirt, and Ugo, with a table full To meet increasing demand for the Rossi engines, an additional of the new Rossi .61 engines. manufacturing building is under construction.

Several of the milling machines used to machine the ports in the High precision lathes that are used in the manufacture of Rossi sleeves o f engines. engines.

20 MODEL BUILDER By DICK HANSON

• We recently went through an experi­ kind of an uneven look, like a barrel roll. problem was resolved, but ourcuriousity ence which threw some new light on Changing the aileron linkage to produce was not. trimming procedures for model flying considerable differential (more up than When we set up the original 700 Tipo, machines. down), solved this problem. we reasoned that a little negative stab Four of our local fliers had just com­ The standard Hippo 825 also suffered incidence would work best to eliminate pleted new birds and were in the process from "up-pitch” in both knife-edge any up-trim in the elevator. According of shaking the bugs out of them. . . I had positions. The trimming procedure on to ail the feedback we could get, the also just completed a new 750 inch Tipo this bird was not an easy one. To begin premise was right. However, a number for myself, so that made five very similar with, I had installed the stabilizer on this of builders noted that the leading edge designs (one 700 inch Tipo, two 750 inch plane approximately 1/16 positive, i.e., of the wing had to be shimmed slightly Tipos, one 800 Hippo and one 825 Hippo the leading edge of the stab was high. down to get the best results and elimi­ Tipo.) Although we knew this to be the case, nate down trim in the elevators. The 700 Tipo had an "up-pitch” we reasoned that shimming the trailing The 825 and the 750 models have problem in both knife-edge positions. edge of the wing down slightly would lighter wing loadings than the original Shifting the balance point aft resolved correct any problem . . . WRONG! Also, 700 inch model, so we decided to reduce the problem by eliminating the up trim adding about 6 ounces of lead to the stab slightly the stab incidence. The old in the elevators. reduced the elevator trim to zero but adage, "If a little is good . . . ” finally got The one 750 model needed nothing the up-pitch persisted. It also made the us. What we had unwittingly done was but some basic throw adjustments. My elevator a little goosey. Ultimately, the change the drag profile of the fuselage 750 was quite nose heavy but I tried it stab was cut out and reinstalled in the anyway. The rolls were lumpy and the normal (slightly negative) position. The Continued on page 72 "up-pitch” problem was evident. I shifted the radio (servos, receiver, and battery) to the extreme rear of the wing saddle area . . . this almost totally cleaned up all trimming problems. Next, I changed the tuned exhaust pipe from a very long type (new S.T. 60 design) to a short C.M.B. 60 pipe. This setup stopped all pitching tendencies. The results here were very subtle, but positive. I am still scratching my head on this one. The angle and alignment were about the same on both pipes. The shape and length were the only real differences. However, it worked! As a side note: A very interesting experiment was playing with the coupled flaps (J.R. radio) to see if trim change on my 750 was affected. The changes in aileron setting (using the flaperon trim lever) produced little, if Mounting the stabilizer at incorrect angle w ill cause model to fly w ith the tail higher or lower any noticeable change. .. than desired, and can cause pitching problems. Also causes elevator trim settings which con­ Next, the 800 Hippo rolled badly . . . tribute to pitching problems.

Changing incidence of the wing and stab w ill alter angle of attack the fuselage assumes in flight. This can have same effect as completely redesigning the fuselage or the relocation of all major components!

NOVEMBER 1982 21 commercially available products of this type available. One that comes to mind is called a "Thermic Sniffler” available from Soaring Products, Box 117, Ken­ sington, MD 20795. There is also a German made device called a “ Ther- mikdetektor," from the well known Simprop Company. It is novel in that it does not transmit back information via a transmitter, but instead flashes a strobe light, claimed to be visible in sunlight and up to 500 meters, I’ll let you do your own conversion as an exercise in metrics! I don't believe it is currently available in the U.S.; if interested, contact Simprop Electronics, Walter Claas GMBH & Co., Ostheide 5, 4834 Harsewinkel 1, West Germany. FREQUENCY SYNTHESIS Since the good news early this year that 1982 will be known as theyear of the new R/C frequencies (if everything proceeds according to schedule), a new term is being heard: synthesizers. Don’t let it scare you, it is not something else With just a few mods, older 27 mHz transmitters can become reliable 6-meter units, though that is going to show up on the top of lacking many of the modern bells and whistles. See text. next year’s transmitters so that rich kid in the club can out-point you at the next pattern contest. Frequency synthesis is an already established method of gen­ erating a large number of desired fre­ Electronics Comer quencies from one, or a relatively small By ELOY MAREZ number, of frequency generating devices. Down here at the thumbs-on level, it THERMAL SENSORS the bargain, and are also available for means that we may someday be seeing I recently had a call from home .. . anyone else interested in the subject. R/C transmitters with output frequency Corpus Christi, Texas, that is, from a It might also be possible to adapt some controlled by a calibrated knob, marked glider guider named Wright Singleton, of the components found in the weather in either frequency, or channel num­ who asled for information about ther­ radiosondes, the type that are hoisted bers, which we merely rotate to the mal sensors, or detectors, the kind that aloft by those big balloons and which desired spot. There are a number of ride aloft in the sailplane and radio transmit back altitude information in advantages, such as the elimination of information about altitude gained or addition to whatever else they are frequency conflicts at contests and the lost back to the flyer. Wright has the programmed for. Possible sources for over-crowding of some certain fre­ radio link working to his satisfaction, but them are: quencies as happens now. There are is looking for help in detecting the Fair Radio Sales some obvious disadvantages, such as the altitude changes, then encoding and 1016 E. Eureka worst case example of some kid playing decoding the information back here on Lima, OH 45082 with daddy’s transmitter, turning it on, the ground. Meshna and spinning the frequency dial, thus I often wish that there was some way Nahant, MA 01908 cleaning out everyone who happens to to get to the general public, and con­ Just recently there was a rather be in the air at the time. vince them, or at least let them see that interesting flying object over the skiesof The subject is already being discussed weare far from a bunch of grown upkids southern California that some of you by the manufacturers, including some playing with toy airplanes, to have them might have missed hearing about. It first built-in safety features to prevent catas­ understand the degree of sophistication came to light when some airliner flying trophic results due to unknowing, that is involved, and the amount of at 16,000 feet reported something unthinking, or uncaring operation. precision that is involved. This project of familiar, though unidentified, at the I have one possible safety to add: How Wright's is another example. He must same altitude. It turned out to be some about a time delay, so that the trans­ detect, and measure accurately, air aviation fan who, probably in protest mitter is completely dead for, say five pressure that only changes 0.00052 per over the high airline rates, had attached minutes, after activating the frequency square inch for every foot of altitude 39 weather balloons to a lawn chair. .. change knob? This should eliminate change. It has been done before, of yep, an aluminum and plastic lawn chair, some of the problems possibly caused course, both commercially and by a few and headed for the wild blue yonder. by fumble-itis, and provide enough time of the hardier do-it-yourselfer’s. Mr. His equipment consisted of a camera, for the serious flyer to be sure that he is Dick Jansson, a very well known name in which he forgot he had, taking no doing things properly. the early days of R/C, did some excellent pictures; a CB radio, which he dropped; Anyway, for tnose of you who are papers on the subject, which appeared and his rather novel altitude control interested in learning more about the in early issues of RCM, and “ Grid consisted of a BB gun, with which he subject, an excellent source of informa­ Leaks,” an excellent though skinny pinged away at the weather balloons. tion is Plessey Semiconductors, 1641 technical bulletin published at one time What does this have to do with Kaiser Ave., Irvine, CA 92714; (714) by Ace R/C. Maynard Hill and Ben Wright’s project? Well, just maybe this 540-9979. It is a manufacturer of inte­ Givens also did some early experiments guy has 39 radiosondes for sale, cheap! grated circuits of many varieties, includ­ and shared them with us in the pages of Seriously, if any of our readers have ing a number designed specifically for Flying Models. Copies of all these further information on the subject, radio communication and synthesizer publications are now in the hands of which they are willing to share, please circuits. They have had an excellent young Mr. Singleton, assuming that the pass it along. book on the subject, entitled “ Fre­ post office department kept it’s share of Currently, there are not a whole lot of quency Synthesis 1C Handbook"; 267

22 MODEL BUILDER pages of information about frequency forget the airborne componenets. In synthesis in general, and the application most cases, the latter did not survive the of Plessey IC’s in particular. Complete years, due to the more unfavorable circuitry is included, with even printed environment in which they lived and circuit board layouts for test and evalua­ worked, and then too, the present-day tion. Unfortunately, the book is no equipment is far superior in design and longer available . . . and I would agree operation. But it is compatible, and with you that it is dumb to mention it, matching an oldie but goodie trans­ except that an updated 500 page version mitter, converted to six meters, to one of will be available in about six weeks, today’s receiver/servo combinations according to a company representative can be an inexpensive way to get that with whom I spoke on the phone. second bird in the air. Taking into consideration deadlines, The surest way to success is to write lead times, etc., involved in the produc­ the manufacturer of the equipment of tion of MB, we are talking about mid- your choice, if he is still around, and ask September in real time, so you'll if there is conversion information to six probably be able to get availability and meters. Some of them still may be able price information from Plessey about to supply you with coils, which will the time you are reading this. certainly make the project easier. If such And by the way, if the address is information is not available, enclosed is vaguely familiar, but you can’t quite a fairly simple but proven six meter place it, it is because you were once a transmitter schematic, which will not be black box flyer; that is the address of the too difficult to build on most PC boards last home of Orbit Electronics... which previously held a 27 MHz RF CQ SIX section. The crystal is a current funda­ Those of you fortunate enough to mental frequency type, and though have ham licenses, and who fly on six transistor types are given, most transis­ meters, are further fortunate enough tors now in place in one of these vintage to have a very inexpensive source of R/C 27 MHz sets will also work in similar equipment! Part of it, anyway, in the circuits at 53 MHz. form of the many older 27 MHz trans­ However, don’t forget that the old mitters still around, in good shape, with center-tapping (if used) antenna will the possible exception of needing a new have to be replaced, or, if possible, set of Ni-Cds. disassemble the coil and solder a single As we all know, there were some straight piece of wire in it’s place. excellent R/C systems being built long And please . . . any frequency other before the advent of today's multi­ than 53.5 . . . that is the one I use! switch, air-conditioner and stereo MORE FROM DEEP Acutech Specialties' FS-25-R Power Indicator. equipped models. And for a number of IN THE HEART O F... Fully described in column. years, most of the differences were all From Euless, Texas, to be exact, Suh, external, with a few exceptions here and we present Acutech Specialties’ new FS- both, to my knowledge, this is the first there. Most of the manufacturers were 25-R Power Indicator. It isatwo-function such device to appear which gets its using well proven successful circuitry, device, which senses and measures both information directly from the transmit­ and in the case of their six meter equip- transmitter output power, and through a ter’s emitted signal. ment, were merely changing a few plug-in cable assembly, receiver battery Both mentioned tests are made auto­ components here and there, and fre­ voltage, providing both visual and aural matically, though some simple cali­ quency wise, it is not too long a journey indication of their status. bration is required upon installation to from 27 to 53 MHz. The transmitters of Though there are similar transmitter the transmitter, for which easy-to-follow many of these old systems will be found and receiver battery voltage monitoring instructions are provided. Basically, it to be easily available, for the asking, in devices on the market, some which light gives you a green light when the trans- many cases, though we can just about LED's and some which make a noise, or Con tin ued on page 72

NOVEMBER 1982 23 that all flight judges will be given special purple glasses which result in the model becoming completely invisible during the flight. All manuevers will be verbally described by an appointed "maneuver observer.” A special set of words and phrases have been provided in the rules proposal that the observer may not use. These include such items as "W ow!", “ Ugh!” , “ What was that?” , and no la u g h in g is a llo w e d u n d e r any circumstances. SC-4 seeks to add a new mechanical option. A modeler, Wilfred Wacker, has been very upset about the fact that certain types of aircraft just aren't allowed to drop things as a mechanical option. Noting that bombs, parachutes, tanks, etc. may be dropped from military aircraft, he was incensed that his Cessna was excluded from such scoring. There­ fore, he has suggested the "Samsonite luggage drop test” as a possible mechanical option. This option may not be used by anything but non-military types. The judging guide suggests down­ grading for such things as spilled con­ tents or incorrect “ luggage trajectory." Rumors have it that two other luggage companies are planning to use such drop tests in their ad campaigns, forcing the removal of the word “ Samsonite” from the rules proposal. These are a few of the new proposals which we have to look forward to in the ’ ldont know if I should try sca-ie ot- not. next cycle. Be certain to provide your I can't eve-n slide o n a decal without. opinions on these as the rules proposals fness in<^ itcip." move through the cycle. Holding an Ace T’was 1969 that I first began flying with a particular brand of radio. I have been quite satisfied with it during that time, encountering very little problem over the years. Last year I got the itch for a new radio and began to cast about for something to buy. I was kinda looking for a little special work in that I had hoped to find some way of separating the throttles on a twin under certain circumstances. Several persons sug­ gested that I check with Tom Runge at Ace. I received a very nice reply to my • His trenchcoat was wrinkled and his house needs painting, we see an escala­ inquiry suggesting several ways my gait the tired slouch of the spy. The tion of events like Grass Sport Scale, needs might be met. I didn’t act quickly information he brought, however, was Precision Rug Cleaning, and Giant after that, but then Bud Atkinson and his really hot and he sold it at the right price. Garage Cleaning. Experience suggests wife, Alice, shared a cabin with the The bits of microfilm revealed some that there will be many cross proposals Underwoods at Rough River. Bud owns fantastic items which we can bring to aimed at SC-1. a couple of the Silver Sevens and kept you, the reader. He had a list of the new SC-2. This rules proposal seeks to end leaving them sitting on the table in the scale rules proposals for the next cycle. forever the problem of color documen­ cabin all weekend. Such things just work What a list they are. tation for scale models. It proposes that on a guy! SC-1 is probably one of the most all subjects be painted purple. Each scale In looking into the Ace line, I dis­ interesting ever seen. Submitted by L. modeler will be provided with a purple covered some interesting choices. Cer­ Jones, SC-1 proposes a completely new marker pen to color their documenta­ tainly if you wish to "build your own,” event called Home Sport Scale. We tion. The score given for color, finish, their kits are available allowing you to became quite suspicious when review­ and markings will be awarded on the plan your own layout and goodies. I was ing the proposal and noted several basis of the modelers ability to stay surprised to learn that you can also have unusual provisions. For instance, one inside the lines when he colors the them build the outfit to your specifica­ portion stated that “ judges will not documentation. A "colorer of the docu­ tions as far as stick and trim locations, consider the roof or windows.” In mentation” part of the rule is designed etc. In addition, there are items which checking we discovered that "L. Jones” to assure that the modeler has done the should appeal to scale flyers in particular. was Linda Jones and she figured the only actual coloring and not their six year old For instance, you can have the arrange­ way she could ever get the house painted son or daughter. ment that couples the ailerons and was to make the house a part of the AMA SC-3 has been submitted by the same rudder, provides differential ailerons, rules structure. We see some sinister modeler and will undoubtedly solve the can be switched in and out with no possibilities should this event become a other biggest problem of scale model­ reality. Aside from the fact that our ing; that is scale speed. The rule requires Continued on page 73

24 MODEL BUILDER Fan and clutch on High Point Balancer. Note four holes drilled in Anti-rotation link (arrow) for swash plate is slipped on main shaft clutch, needed to balance unit. just below head, for balancing. CHOPPER By RAY HOSTETLER PHOTOS BY THE AUTHOR

• Before I get to the main topic, two I had never flown a model helicopter sure the engine wasn’t too lean, as a lean things impressed me this last month. above 1,130 feet, and I had heard stories run can cause vibration. Again, nothing. 1) There is always so much more to learn, about high level operations. I had Back home I double-checked rotor and 2) Humans are prone to error. In American R/C's Super Mantis running head balance, all was fine. I did a total case you’re wondering what brings all of very nicely back in Long Beach; I dis­ balance job, see photos. Everything this on, let me explain. assembled the blades and tail boom for above the swashplate was kept on the This spring I started flying full size Jet the trip to Arizona, then rebalanced head, even the anti-rotation bracket, Rangers with Grand Canyon Helicopters. everything upon arrival at the Canyon. and I substituted the collective rod Most of you probably know that the Once settled I took the Super Mantis (which stays in the mainshaft) with a Grand Canyon is in Arizona, but you out one afternoon to see how it’d do at short piece to simulate the collective may not be aware that the south rim is 7,000 feet. I re-tuned the engine while a pushrod’s weight. 7,000 feet above sea level. This brings friend held the ship overhead. All was Back out again, same thing. interesting circumstances to model good so we put the helicopter down and Well, if it wasn't the main rotor, it must helicopter flying. I advanced the throttle. Immediately at be the tail rotor. I put the whole tail lift off I had a vibration. I tracked one assembly on the High Point balancer (as blade high, then the other high, no luck. per July '82 MB) and clunk! One blade I fooled with the mixture some, to be was way o u t. . . must have forgotten to

Complete head ready for balance check. Hiller rod and simulated collective rod left on head. Note high angle on collective yoke .. . 9-1/4° pitch needed for hover at 7.000 ft.! Low pitch Pro Tach in use at the field. Main rotor being tached as quasi-governor is advanced from idle . . . set at 2-1/2°. 1,240 rpm indicated. NOVEMBER 1982 25 check the gears, pulleys, or belt drive system. That evening the whole ship was apart as I carefully inspected and balanced anything I could get my hands on! Everything checked out with only minor balance adjustments. I reset the tail rotor belt tension as I had it before, and back to the field the next morning. That shake was still there! What else was there? I balanced the M/R head again, still fine, and decided to pull the tail rotor assembly and recheck it. Clunk . . . out again. This proves point number two. I removed the weight I had applied earlier and things were back in balance again. Evidently, before I had not had the blade-holders screwed down even­ ly, or something like that which would throw out spanwise balance. Back out to try it again. Finally I was getting somewhere. Vibration was down quite a bit, but the boom still had a visible buzz. I took it back to the car and loosened the tail boom belt tension. I FIG. 1 TYPICAL FIXED PITCH ROTOR HEAD had it set halfway back in the slots, so I let SCHLUTER HELI-BABY, AMERICAN REVOLUTION .40.IBOTH WITHOUT it slide full forward to the loosest tension TEETERSPRING):GMP CRICKET, (WITH TEETERSPRING). possible. Back out to the pad and finally, dead smooth flight! balance it before ... I straightened for the fun of it I stuck the fan-clutch As I look back at the whole episode, 1 everything out and balance it again. Out unit on the balancer. One side immedi­ believe it was the out-of-balance clutch to the field, same vibration was still ately dropped down and stayed there. that started the whole thing, accented there, as pesky as ever. I tracked and Five minutes later I had four 3/32 dia. by the belt tension being a shade too retracked the blades in and out, no holes in the clutch to make it balance. tight. Then my human errors compli­ change. Back home. Two 1/8 inch deep and two 1/16 inch cated things a bit more, enough to raise O.K. Time to sit back and analyze deep (see photo). I thought that this was my frustration level. After all, I’m sup­ things. Main rotor tracked and balanced. out a lot for a clutch spinning at 10,000 posed to know what I’m doing . . . Tail rotor tracked and balanced. Maybe r.p.m., and I thought I had finally found The other interesting thing is that the the cooling fan is out of balance. .. That the culprit. vibration problem was not even ap­ evening I pulled the engine, fan and Next morning I was back out at the parent back at Long Beach! I am learning clutch unit. Put the fan on the High Point field. Essentially the same vibration was that high altitude makes everything balancer, it was out just a touch. Not still there. Not quite as bad, but I still work very hard. (My wife likes this enough to cause the moderately heavy classified it as a moderate shake. Now I excuse . . . The altitude must be getting vibration I was experiencing. So I started started to get frustrated. I figured that to you.) At sea level the engine and drive to re-assemble the clutch to the fan. just the only thing left to do would be to system can loaf along. At 7,000 feet everything is to the limits. Actual avail­ able engine power is down but power to the drive system is up. Blade pitch in the main and tail rotors is considerably higher, putting a greater load on the head bearings, gears, etc. Another thing I noticed was the difference in full scale ships vs. altitude. For instance: At sea level the pedals work smoothly with minimal effort. At 7.000 feet the control force is con­ siderably higher. More power and more pitch required at altitude. (You can’t feel this difference in the cyclic as the system is hydraulic boosted. With a non- boosted system the cyclic forces are higher too.) All of this has to apply directly to the model helicopter as well. As far as performance of the Super Mantis goes, yes, it will fly up here. At 7.000 feet and 70 degrees (which by the way happens to be 9,200 feet density altitude) it will hover up to three or four feet, just at the limits of ground effect hover. For forward flight you have to push it forward very slowly and take advantage of effective translational lift, otherwise you’ll find the skids digging into the ground. FIG. 2 TYPICAL COLLECTIVE PITCH ROTOR HEAD. Approaches must be made with cau­ tion. Adding throttle too late at termina­ AMERICAN'S SUPERMANTIS. (SHOWN) SCHLUTER HELI-BOY (SIMILAR) tion could be costly, but since I’m 26 MODEL BUILDER flying my Quasi-Governor (Sept. '82 MB) on the Super Mantis it really makes the approaches easier. Blade speed does not fall off at all on descents, so cyclic and collective control remains extremely steady at all times. Now all I have to do is find a way to fit a Webra Speed .61 into the Super Mantis. Then I’d have a real high altitude combination. For those of you at sea level or nearly so, you had better appreciate your conditions. I know I will when I can get back down to where the air is thick enough to breathe. To finish up this experience, I’d advise all of you with a Mantis or Super Mantis to balance your fan and clutch unit, and set the belt tension as loose as possible. If you have a new ship, let the boom slide to the most forward position. If it slips a little, then tighten it up slightly. As a case in point, it also proves again that the balancing method described in the June and July '82 issues of Model Builder works extremely well. If the rotors are balanced and a vibration persists, look elsewhere in the machine. BACK TO BASICS Last month I started a series of articles for the beginner. I briefly compared the fixed pitch helicopter with the collec­ tive pitch ship. This month a look at the rotor heads of each. In Figure One you have a simple fixed pitch head with all parts labeled. Figures FIG. 3 TYPICAL COLLECTIVE ROTOR HEAD Two and Three show two types of typical KAVAN'S JET RANGER, (SHOWN) HIROBO SCALE HELICOPTERS (SIMILAR). collective pitch heads with everything identified. I would like to go into more detail on the operation of the heads this etc. A requirement for new helicopter your chopper. Sometimes on purpose. month, but space will not permit it. I pilots. Starting Belt: First drink before flying a already have eight drawings to simply Shin: Area on lower leg for testing helicopter. (Soft drink that is .. . rh). explain rotor head operation, so I’m just hardness of rotor blades. Expert: Someone who has crashed going to stop here and save it all for next Ground Effect: Standard answer to the more helicopters than anyone else. month when I can devote the space to it question "Why did it break into so many Come to think of it, it is about time for that it deserves. pieces?” my own cyclic pitch. See you next ORGANIZE! Auto Rotation: Backing your car over month! · A new helicopter club has formed in the Southern California area. Aptly named the “ R/C Helicopter Club of Southern California” , it is based in the North Hollywood area. President is Pete Adler, and Newsletter editor of “ The Rotor Head" is Lynzie Flynn. Anyone interested in joining up or receiving the newsletter should contact Mike Flynn, of M-K Model Products, at 11526 Bur­ bank Blvd. #12. P.O. Box 284, N. Holly­ wood, CA 91603. Mike will be able to supply you with the information you need. To close out this month you can start to work on your helicopter vocabulary; courtesy of the "LARKS Flypaper” from Eustis, Florida. Crash: Result of mixing pilot and helicopter. Hover: To remain motionless while suspended over a fixed point. Often seen at hangings, but seldom at heli­ copter flyings. Collective Pitch: Request from United Way, Red Cross, etc. Cyclic Pitch: Monthly plea to wife for money for new blades, gears, etc. Tail Rotor: Censored. Tail Boom: Noise made when tail hits first. Training Gear: Diapers, rubber pants, ''You better go back and read Ray's article on setting the pitch for hovering at sea level!" NOVEMBER 1982 27 * I I R&R Models' "Stinger" looks something like a big tail-draggin' Kaos. Fully aerobatic at 17 I pounds with a Quadra. Γ I

A “ Bevy of BIG Birds" at Hill Country, Mor­ gan Hill, Ca. M ajority of modelers are staying w ith sensible size biggies. reflexes honed to a fine edge . .. and »I here’s how ... By connecting the smallest diameter hose to your shop-vac, and using a crevice tool at the business end, you (try to) suck the bugs out of the air while they’re whizzing around making the JUNE BUGS: THE TRUE STORY ing you with the unmistakable impres­ usual kamakaze attacks. The small June bugs taste just like buttered sion that the beetles are a blight. diameter hose is easier to handle than popcorn . .. according to Texas racoons Well, once again I’ve had to change the larger, less flexible one, and the and armadillos who've scarfed down my thinking, ’cause the scope of June narrow, tapered crevice tool makes it both kinds of treats. But R/C’ers, how­ bug operations has been expanded; quite sporting since the opening is ever well they like buttered popcorn, these wee beasties can now be used to mighty small (like using very light tackle usually try to ignore these pesky bugs; help keep eye-hand coordination and for trout). The end result: your timing although within the past few years our modeler’s inherent creativity has added an entertainment category to this June bug (also known as May or June beetles) thing. You see, guys found they could get their jollies by Hot-Stuffing these nasty little critters. . . whichsometimesturned out to be an act of self-defense (you oughta see how big some of these suckers grow in Texas). Now it's true that this kind of perverse entertainment cuts into building time and uses up Hot Stuff like you were feeding it into a machine gun .. . but oh how sweet it is to occa­ sionally succumb to a bestial urge and watch that accursed enemy go up •i (down?) in smoke. And last month I Bob Johnson, of R&R Models calls "Snapper Twoo" a much needed, non-scale bipe. Being a jumped on the anti-beetle bandwagon two-winged Snapper weighing less than 20 pounds, it should fill the bill. «I with both feet by stating that I sure w ouldn’t miss "those damned June bugs” after moving to Washington, leav­

28 MODEL BUILDER and coordination are fine-tuned because the bugs are so difficult to suck up while on the wing. "Aha,” you say, “ that’s all well and good, but who needs those stupid bugs in the summertime. It’s during the winter that my reflexes go to hell. And besides, what if I happen to live in Limestone, Maine, where I never even heard of these May or June beetles . . . and wouldn't recognize one if it fell on me?" Take heart, oh liver in Limestone, ’cause you and everyone else who resides in the hinterlands will be able to reach the same exhalted state of readi­ ness as any good old Texas boy. There’ll no longer be any reason for you to covet a Texan's bugs because you, too, can be John Morris' Byron Mustang begins takeoff. Bird has over 50 flights. John has some mods to knee-deep in these whirling dervishes offer other builders. See text and drawings. any time of the year and benefit from their presence. JuBe’s, Unlimited, is planning to flash- freeze these beetles; they’ll be bagged in quantities of 1000, 5000 and 10,000. After receiving your bag of bugs, just scoop out the amount you prefer and let them thaw out at workshop temperature (you’ll need at least 55 degrees in order to have busy beetles), turn on your shop vac. . . and you’ll be on yourway toward becoming a better and much safer pilot. Price-wise, we expect to market the "JuBe’s” at a penny a bug for the 1000 and 5000 count bags, and 3/4 of a cent apiece for the 10,000 size bag. This largest amount was really designed for clubs and large groups, as just 1000 beetles would last one BIG Bird Lover for about a year (JuBe’s, Unlimited, recom­ mends you thaw out and use 50 June bugs every few weeks in orderto keep in top shape without overdoing the training). And don’t worry about infesting an area that hadn’t previously had June bugs . . . because we only flash-freeze male beetles. You see, only the males are attracted to, and flit around, lights; the females shun these lighted areas and therefore are never bagged with the males ... so you’ll never sweat the dubious honor of having a "June Bug Blight" named after you. Watch for our ads giving firm prices and JuBe’s, Unlimited ordering info. . . MORE KICK FOR THE MUSTANG A whole bunch of guys are interested in the Byron P-51, and John Morris, of Louisville, Kentucky, is one of many who already has one. He’s been winning Modification to retract mechanism on Byron P-51 by John Morris seems to indicate he chose to awards and/or hardware just about ignore instruction regarding the filling in of "gear up" cavity, resulting in occasional failure to every time he’s entered a contest or fly- come down. Skip Ruff (Byron P-51 review, Jan '82 MB) filled in cavity per instructions, and in; but even though he’s a fine pilot, the uses higher air pressure to keep gear up tight during flight. John's method is recommended if road to success has been a rocky one for you're not using enough air pressure. John .. . because the stock P-51 needs as it's designed to do. However, due to will make the difference. However, you modifying to enhance its longevity and friction created by the locking pin being must get the gear up and down travel flying characteristics. snug in the cavity, the gear will very adjusted before the Loctite sets because So, for the countless guys who love often not unlock and free-fall as they are the gear will not give on the pivot axle the Mustang, and are interested in, or supposed to. with Loctite on it. I've had a pivot pin already have, this most familiar of "By simply rounding off the edge of guide break (E) due to heavy side loads warbirds, here are some valuable tips the Up-Lock Cavity (C), thereby elimi­ on landing. PUT THIS BIG BIRD DOWN from John on how to keep her nating this friction, a loss of air pressure STRAIGHT! truckin'. .. will allow the gear to free-fall to the " Proper main wheel alignment is LANDING GEAR down position every time. necessary to avoid ground loops at taxi " With the molded-uplock (A) in the "As for the gear folding under landing and rollout speeds. .. and ground loops Up-Lock Cavity (B), the gear will lock up loads, red Loctite on the pivot axle (D) are the things that cause side loads .. .

NOVEMBER 1982 29 and side loads cause things to break. "I was never able to perfect operation of the landing gear and gear doors from single servo operation. So, I took the easy way out and used another channel and servo to open and close the main gear doors. (And using vasoline as a lubricant on the moving parts of the landing gear works very well.) "Most fellows can’t bring themselves to put from 90 to 775psi in the dinky plastic bottle that’s used for an air tank, however, it takes this amount of pressure (o insure proper operation of the gears. I just stay between the second and third line on the pressure gage and haven’t had any problems. CAUTION: you must tie the air hoses in the fittings with wire or else they’re going to blow off at these high pressures. "The plastic wheel hubs will wear quickly and cause wobble, which will allow rubbing on the strut; keep the axles well lubricated. Dale Bassant, Grapevine, Texas, built this Great Lakes 2T-1E from Frank Comyns plans as "About the strut .. . I loaded the published in March '82 MB. Powered by 2.4 Kioritz. Has been flown by now. upper part with vasoline, then pushed the lower part in and secured it with the and epoxy (it's not mentioned in the On a grading scale of one to ten, I rate knee. The grease helps dampen bounce instructions). Dario "US Quadra” Brisighella’s plans at as well as keeping the struts lubricated. FINISH the top and compare all others to his. A little messy, but it works! " The finish is entirely automotive Now I know there are other good ENGINE AND DRIVE UNIT laquer. I believe it's the lightest type draftsmen and craftsmen out there "Let’s start with vibration . . . learn to finish and the easiest to work with. The cranking out plans, but none I’ve seen so live with it! There has been some specu­ weight of my bird, ready-to-fly, with far are better than Dario’s . . . and in lation that the prop hub has caused the onboard starter, retractable tail wheel, most cases they're not quite as good. So biggest part of this vibration. But I don’t eight servos (less fuel) is 23-Ί/2 pounds "Mr. Quadra’s” handiwork is the yard­ think so because I disconnected the . . . and the wing is double-glassed with stick I measure all others against. . . and, drive unit and after starting the engine two-ounce cloth. unfortunately, too many nowhere mea­ found that the vibration was still the FLYING sure up in this comparison. same (it's only bad at idle speed). "What can I say? She’s beautiful! She's If you've been lucky enough to get a “ Due to the extreme tension on the easy to fly for anyone with some experi­ look at Dario's “ Starduster Too" plans, drive belts, I elected to move the front ence under his belt. She’ll loop, roll and you know what I mean about quality. His driveshaft support further forward to four-point with ease. The only problem plans are so complete, so cram-packed minimize the driveshaft overhang at the is that she tends to run out of elevator if with info, drawings and sketches, that forward bearing, hopefully eliminating you get too slow on landings. . . and she most guys want to jump right in and start some of the drivesha ft flexing forward of will really slow down. If you happen to cutting wood. In fact, even if you never the bearing support. Also, the drive unit lose the engine, just point her nose plan to build the "Starduster Too,” the I have has the idler pulley removed. down and save the speed for flare; it’s all Ians are worth the thirty bucks just "And be careful installing the rubber you can do. And don’t forget to check ecause of all the great usable how-to’s universal Joint. If you tighten the clamps everything frequently (also known as and building hints. . .such as fabricating improperly, you’ll squeeze the rubber preflight and postflight, ama); if you do your own steerable tailwheel, making into the bearing support, causing fric­ you'll have a chance to enjoy your and rigging flying wires, support struts, tion . . . and worse, putting pressure Mustang as much as I’ve enjoyed mine. ’’ shock-absorbing landing gear, etc. against the crankshaft end, which puts THE GOOD, THE BAD .. . AND WORSE I especially appreciate all the well- the thrust washer into an early grave. Got some strange queries about plans. detailed cross-sectional data and bulk­ "It’s a good idea to use blue Loctite on Seems that a lot of your potential head views his plans contain. And the spinner screw because if it vibrates scratch-builders want to know who there’s no guessing as to what any part of loose it’s going to make a mess out of turns out good plans .. . but most of the his planes are supposed to look like, nor your prop blades (I'm speaking from letters give no indication as to what kind do you have to waste time searching for experience), not to mention the really of birds are favored. Okay, you want my the important info that’s usually missing bad vibes it can cause. two-cents worth, so here it is. .. from other plans. TAIL WHEEL RETRACTION First, you must understand that I've At this point you may be thinking that "I use the Goldberg Nose Wheel Unit got this "thing” about plans; they’ve got I’m on the payroll at US Quadra.. .so let for the Mustang's tail wheel. However, to be legible and complete. I hate the me state here and now that although I you could use a B&D unit and save the faded blue-line drawings that all too think his plans are great, I do not agree extra servo and linkage. often are skimpy on bulkhead views and 100% with Dario’s philosophy about BIG RUDDER cross-sectional data. Plans should be so Birds. A prime example being the dif­ "I elected to use two flexible cables to complete that anyone with some exper­ ference in our thinking about servos. I the rudder. I believe it cuts down on ience shouldn’t even need instructions most certainly favor the use of proven, flutter over the pushrod type system. in order to build that design with little or robust HD servos, while according to (Single pushrod control systems belong no problems. Turning out a well-built, Dario “ the KPS 14 or 15 servos (or their in the smaller .40 and .60 size ships; not good-looking BIG Bird is enough of a equivalent) will suffice.” (At least we do in a BIG Bird! ama) challenge without having plans so lousy agree on the need for a 1200mah battery WING they turn every step into a frustrating pack.) "Knock on wood, I haven’t had any of guessing game. And it always seems that And while on the subject of Dario’s the flutter I’ve heard about, even after 50 the guy who turns out poor plans also plans. I’ve got to tell you about his latest flights. I did wrap the center section of turns out equally poor instructions and the wing with 6 inch wide, 6 oz. cloth near worthless pix. Continued on page 94

30 MODEL BUILDER Steve Kaneshiro launches Bob Angel-Sanchez's "Focus" at SULA-hosted semi-finals, in Carson, CA.

Steve Kaneshiro and his Eismann "Focus” , which he modified by installing a wing joiner Rc SOARING box around the joiner tube. E-387 airfoil. By BILL FORREY Photos by the author. before the contest began. Not anymore. This year, I competed in the F3B • I would like to begin my column this provide you with the basics, they won’t program. I made it to the semifinals month by thanking all of the many get you very far in competition. hosted by the Soaring Union of Los eople from the various clubs who F3B has come a long way in two years. Angeles (SULA) before breaking my osted FAI contests this year. You guys Back in 1980 at the last team selection Gemini MTS and having to drop out. It can really feel proud that you helped finals, the hot setup was a strong Sagitta would have been a whole lot more fun select the team that represents us in Eng­ and a Hi-Flight winch. Not this time. I for me if that hadn't happened, but land next year. I know from first-hand would say, at least in the Southern what-the-hay, I got a chance to see some experience that sometimes all your hard California semifinals, that the level of really fine F3B flying, and that was worth work goes unthanked, and even unno­ competition has doubled in every way. it. ticed, but believe me, it is appreciated, The pilots who are competing are, in There were at least 20 serious com­ and it is noticed. Thanks again. general, more skilled in the rigors of the petitors out of the 45 (approx.) entrants, This month I would like to write a little speed, distance, and duration events. and I would like to tell you about some about what the fliers in the Southern They are flying more highly refined of the more interesting things I saw. California area are flying, and how they sailplanes, and launching them off ever Roger Roth, Larry Jolly, Mike Charles, are putting together their F3B systems. If stronger winches. There is more pres­ and a few other like-minded Pacific you are familiar with F3B flying, then you sure to win now than in the past when Soaring Association fliers showed up know that it demands a whole lot more the semifinals were just the last practice with one of the most sophisticated than just a good airplane and matching event before the finals. You could pick equipment systems that I’ve seen in F3B flying skills. While these two things will the pilots who were sure to win . . . competition. They really spent some time and money putting together what you see in the pictures on the opening page of this article. What they decided to do was couple the best F3B glider kits with the strongest winches capable of launching them. They chose to use Eismann Focuses (Focii?) as their primary flying machines. The Focus is a balsa wood and fiberglass skinned, foam core wing glider. It uses a rather thin Eppler 387 airfoil which has a good performance envelope, and a molded fiberglass fuselage with all the room you would want for receiver and servos. This German kit is marketed in the U.S. by Wilshire Model Center, an MB advertiser. What I like best about their choice of gliders is the very little building required after your initial purchase. That purchase will set you back 275 to 300 bucks, which sounds rather steep, but if you were to develop a similar glider, you would have spent even more money, so it's not as bad as it sounds. That’s not even Dick Odle launches Mike Bame's "Illusion" (2-meter) from his Gorilla "Sport W inch." Mike considering the time you would have normally hits over 900 feet on launch. Shutter speed of 1/1000 not fast enough to stop action. spent in the development of the thing, NOVEMBER 1982 31 Trent McGee launches his Eismann "Camaro" during early round of Roger Roth, Pacific Soaring Ass'n FAI Team Manager, with teams semi's. Wortmann Fx 60/100 airfoil. Molded F/G skins . . hollow. equipment: Focus, two winches, generator, extra line spool. and I don't know about you, but I don’t Now for the external changes. Right in practice before the contest, was used have a whole lot of time and money to off the bat, the most obvious deviation during the contest, and in fact, finished be spending on a design that could be a from the normal way of making winches the contest for a total of an estimated 213 real turkey. is the frame which allows the end of the launches before it was replaced. The PSAers were launching off of 12- output shaft to be supported by ball Incredible! volt starter motor winches. But not just bearings, and with the increased power, Since monofilament necessitates care the standard 12-volt motor that you this was probably a very good idea. The in preventing chafing or kinking of any could buy at your local auto parts store. second thing I noticed was the housing kind to maintain its strength, a superior Although it looked like your run-of-the- built around the outer bearing. In that turnaround needed to be developed. So mill 12-volt, long-shaft motor, it certainly housing is a small pin which, when Roth did some searching and came up was not. Internally, there were many pushed in, contacted the teeth of the with a very good one. changes made .. . nothing really exotic standard bicycle freewheel sprocket What he rigged up was an aircraft . . . that gave their motors “ 40% more which served as a ratchet (No bicycle cable pulley block with a Micarta cable torque and 50% more power.” First, they chain to mess with). pulley recessed inside. It looked like the removed the brass bushings at each end The other things which were present pulley was made of phenolic material of the armature and replaced them with to complete the system: a small Honda . . . similar to a fiberglass composite. Its needle bearings. Second, they removed generator hooked up to a battery dimensions were roughly 1/8 inch wide the field coils and replaced them with charger which kept the 12-volt deep and 2 inches in diameter. four permanent magnets. Third, they cycle marine battery at 15 volts between It was necessary to go to this type of rewound the armature in such a way that rounds, hand held push button switches pulley to prevent the monofilament line they could double the number of wires in place of the usual foot pedal, and the from actually burning on the more that current flows through. This meant twin battery cable leads which powered commonly used bicycle hubs, which are that they needed to double the number the primary and backup winches from typically 1/2 inch diameter and can’t of brushes at the commutator, which the same battery. revolve at high enough speed to keep they did, and at the same time, they Finally, the towline that the Roth team the line speed from exceeding the hub replaced the usual brass brushes with used was 100-pound test, tournament speed and causing friction and burning. more conductive carbon brushes, which grade, Andes or Maxima brand, mono­ The pulley was then hung from a short are several times more expensive (but filament fishing line. Roth claims that length of steel cable on the end of a long don’t last as long). the line they used in the semis was used stake which was driven into the hard soil

Handy hint for aching backs! Roger Roth tightens down a servo wheel, Mike Bame launches Gary Ittner's TAI-PAN, first place F3B winner while Focus sits patiently in simple bracket. at semi-finals. Plane is tw o years old.

32 MODEL BUILDER of the flying field. Obviously, the pur­ pose of hanging the pulley 8 inches off the ground was to minimize ground friction and allow the pulley to pivot with the aircraft on launch. Really a good system. In actual service, the PSAers were not using their winch system to full capacity. They always pulsed their Focuses up the line until they were ready to dive for the zoomie at which point they pushed the nose over, poured on the power briefly, and pulled out for the extra altitude. If the Focus had a good spar system, it could take a full-power launch and survive. As it was, they found out the hard way just how much power was too much power, and broke a few of them in practice prior to the semis. Roger Roth, the PSA FAI team manager, expressed his disappointment in the Focus design to me recently in a phone call. He feels that "in the air” the Focus is a superior F3B machine to most ships used in competition. But, he feels that the wing's structure is a bit of a handicap due to the built-in stress riser at the end of the wing joiner tube. The Focuses that he has seen broken always break at this point. What has been done to alleviate this problem was to skin the fully sheeted balsa wing with lightweight fiberglass cloth. As the Focus already has a fiber­ glass layer under the balsa, a layer over the balsa creates a sandwich which is Gorilla occupied and fixed on that little he really was trying to finish his F3B quite a bit stronger. two-meter. Then, as it took off, there glider in time to become familiar with it Steve Kaneshiro, of the Soaring Union was silence mixed with a few laughs and in practice so he could go to Chicago of Los Angeles (SULA), carried this a step "Oh-my-gods” and finally, as he came this summer. But, you know how it goes further. He added a plywood box around off the line, screams of approval from when you’re a senior in high school. the joiner tube, and extended it out a the onlookers. I thought it was very Some of you will recall Alex as the kid little farther than the end of the tube to reminiscent of the reactions that the who showed up in Joliet last summer for act as a type of shear web near the root. Canadians got last year. the LSF tournament flying Ed Slobod’s What I think he accomplished was a Dick Odle, master mind of the new prototype Gemini MTS. Well, that par­ stronger joiner area, but he is still left “ sport winch technology,’’ also ticular glider has really been through the with a stress riser at the end of the box launched in glorious fashion, but with mill in the last year... webbing. This is a definite improvement, not quite the same results. He was only Jerry Kraincock borrowed itthisspring but not the ultimate solution. It needs a getting 800 to 850feet. (Only?!!!) Yes,he to set some cross country records in the spar to taper off the loads created by the claims a reluctance to really push his desert. He lost a stab a third of the way R015 very hard on tow. Such modesty. A joiner. Continued on page 93 Is anyone listening at Eismann? I hope lesser ship would have folded within so, ’cause I'd buy a Focus with those split seconds, pun intended. structural improvements. Do you remember two years ago a guy Last month I told you about Gorilla named Gary Ittner making first alternate winches and Glider Missiles. Well, they to the U.S. soaring team? He flew a were present at the semis, and they were rather normal-looking polyhedral ship awesome! Pictured with this article is called theTAI-PAN. He also set a national Mike Bame’s "Illusion” launching off record or two with this same ship. Well, the Gorilla winch. The photo was taken start paying attention to this guy, ’cause at 1000th of a second shutter speed, and I he’s pretty good. He took first place at still couldn’t competely stop the action. the semifinals that I attended. And he Mike, unfortunately, didn’t finish the flew against some pretty tough compe­ competition due to pilot error during tition, too. the speed run, but as one contestant put Gary is a consistent, patient flier it, "it was worth coming here just to see (Where have you heard those virtues Mike launch off that winch!” extolled before?). He maxed all his Last month I indicated that not only distance rounds, got 3 of 5 maxes in were 800 foot launches possible, they duration, and was as consistent as any­ were a reality. Well, they are, but so are body in speed. His best speed time was 1000 foot launches. That is the number 26.5 seconds (he hit two in the 28 second M ike Same was hitting on his best bracket, and two in the low thirties). launches, give or take 50 feet. How many people can do that with a Every time Mike would go to launch, a two-year-old glider? scene similar to that which was enacted Another one to watch is Alex "The at Sacramento during the World Champs Kid” Bower. He usually flies borrowed last year would occur. Eyes were sud­ planes, but don’t let that give you the Dennis Brandt with his Eissmann HA I. denly shifted over to the area that the wrong impression about him. You see, Flaperons, rudder and elevator. Eppler 178. NOVEMBER 1982 33 The Airtronics Olympic 650, as reviewed in this column. Parts fit extremely well and framework is strong. This one covered in transparent yellow Solarfilm. All up weight, with Astro 05 XL, is 46 ounces. Span is six feet. - ELECTRIC POWER< By MITCH POLING

• The Boeing Hawks had their first a uninamous “ Yes!!” . The speeds were in the 50 to 55 mph official electric pylon race on June 27 at I should tell the rest of the story . . . range, which is about right for hackers the Hawks field in Kent, Washington. As Dave then asked for a volunteer to take like me. I entered the Challenger 05 but far as I know, this is the first electric over on all the work he had been doing didn’t get to show how it could do, the pylon event to be held in the U.S., to get the races set up. Talk about receiver failed and I barely made a semi- besides the ones in California. The everyone doing one step backwards! It controlled crash landing. The damage inspiration, hard work, and determi­ all goes to show that a good man is hard wasn't too severe, but ended the flying. nation of Dave Katagiri was the driving to find, but I'll bet there will be some I can state that the fuse setup (by John force behind it all, and I would per­ more electric events here in the near Szary) that I showed in the September sonally like to thank him for all the future. Dave won the event, and Ben column works well, the fuse blew and effort. He even designed a plane for it, Almojuela was second. Both raced with saved my expensive cobalt motor. The the Ohm-My-Gosh, which is a delight to the Ohm-My-Gosh and the Leisure 05. 50« fuse is well worth the investment! I fly and definitely faster than any of the The last heat was very exciting, with strongly recommend this; use the spade other electrics that were entered. At the Dave and Ben close on each other; only lug fuses by General Motors (sold also by end of the races, Dave asked if we all the fact that Ben cut a pylon kept it from Radio Shack) with spade lug connectors. wanted another race, and the vote was being either a tie or the reverse result. These are easily installed; just cut a lead, clamp or solder in the spade connectors (Radio Shack), and plug in the fuse. These fuses come in just the right values, 10, 15, 20, and 25 amperes. The 20 ampere fuse did a good job of protect­ ing the Challenger motor. I am using 10 and 15 ampere fuses to protect my Astro 035 and 05 (old system) motors, and they have more than paid for themselves. I have had quite a run of crashes lately (would you believe, five?), and these Radio installation in Oly 650 (I to r): elevator and rudder servos, motor push-push switch, fuses have saved four motors from an airborne pack, receiver. Power batteries and motor in nose. untimely death. That’s a lot of money

"Amazin', ain't it Henry? You can make an airyplane out of all them Peter Ballentine, Mitch's nephew, with Oly 650. "Ashington" shirt little sticks and pieces!" Precision cut parts fit well. refers to volcanic ash covering Washington. Rain washed it away.

34 MODEL BUILDER "Look, Ma, pylon racing without noise!" Dave Katagiri leads Ben Almojuella down the back straight. Stayed like this to finish.

finished and have been flying an Sig Lite Ply, and all wing spars are spruce. Dave Katagiri, spearhead of electric pylon acti­ Olympic 650, kitted by Airtronics, and The wing tips and tail assembly can be vity in Seattle area. His "Ohm My Gosh" design powered by an Astro 05XL. This is a made removable, which I did, so I can 300 sq. in., weighs 33 to 35 ounces with combination that I would not hesitate to take it on trips with me. The motor Leisure 05. recommend to a beginner in electric mount is simplicity itself; the front saved. I originally started to use fuses to power, or, for that matter, for a beginner plywood former has a hole machined in comply with the race rules, which in R/C. The price of the kit is very it that is exactly the right size for the require them, partly to protect spec­ reasonable, under $30, and when you front bearing of the 05, and all you do is tators (electric motors can be tough on open the box, it’s a modeler’s dream. drill two holes to mount the motor to the people!), but now I’m using them on all The kit is beautifull It is as close to a work former with two bolts. Access to the my planes. Thanks, John Szary, for an of art as any kit I've ever seen. The balsa motor is simple, via the hatch that serves excellent fusing system. In addition to its and plywood parts are machined, not as a canopy. The entire building took convenience, it is quite flat, and easy to cut, and the wood is immaculate, not a me about three weeks of sporadic tuck away in the fuselage. The fuses also flaw in it. The kit shows obvious tender building .. . about forty hours . . . the come in pretty colors! It looks right, loving care from the Airtronics people. I same as it takes me to build my own installs right, and works right, showing have gotten very picky about what I designs. This is fairly fast for me, a total that the best ideas can be simple ones. build, because I usually design and beginner might take four weeks if he The rules of the pylon race are simple; scratch build my own, and I didn’t build had about two hours a night to work. In any 05 motor, limit six cells, sub-C, on- a couple of kits lately (they will stay all, this is the easiest building powered off control, fuse required, fuselage nameless) because I was so turned off by glider I have owned. cross-section minimum to be 3-1/2 x 2- the bad wood and die-smashed parts. I did find that the motor battery 1/4 inches, minimum 290 sq. in. wing The Olympic 650 was a pleasure to build, should be installed directly behind the area, minimum wing thickness 7/8 inch, and I usually don’t like to build kits! The motor, that is, in the nose, for correct unreworked props, no landing gear fitting of the parts was flawless, there was balance. There is just enough room for required, hand launch. The ten-lap nothing that didn’t fit! The directions this for the Astro 05XL pack; other packs course is triangular, with two 300 foot were excellent, complete with photos to might take some fitting and cutting. The legs and one 60 foot leg. These rules show you the steps. I managed to thwart radio gear went in the cabin, which have worked very well indeed, no one their purpose by losing them shortly looks quite empty without the motor had any complaints at all. and compe­ after I looked at them, so I proceeded to battery in it! I decided to put the servos tition wasquite even, with theskill of the build using just the directions on the in the rear of the cabin; if I were to do it pilot the deciding factor. Try a race, plans. The plans are so complete that I again, I would put them in the front. you’ll like it, and with the electrics, you had no difficulty in doing this, every­ Things get quite cramped in the back of don’t have to be a motor or plane expert thing you needed to know was on the the cabin, both vertically and side-to- to compete. plans, which are exceptionally clear and side, and the Bantam Midget servos Occasionally a product comes along well drawn. The structural design is were a tight fit. On-off switching was that is really outstanding, and when it again, exceptional, with simplicity and does, it’s a pleasure to report on it. I just strength the watchwords. The fuselage is Continued on page 78

The Ohm My Gosh is a clean, simple design. Plans w ill be in MB soon. Dave and his plane at Boeing Hawks field, pylon racing site. Note Join the fun! "fuel" container in background.

NOVEMBER 1982 35 1. Contest Manager, SAM Champs, George Armstead, takes a moment 2. Tom Acciavati, SAM Champs R/C Contest Director, makes him­ to run Super Cyke in his Goldberg Valkyrie. self heard with the bullhorn. way Hotel serving as the central head­ quarters. The so-called "bean feed” turned out to be a beautiful setup of tables, smorgasbord, and open bar, all by the cool poolside. The main conven­ tion room was more than adequate for the Annual SAM Business Meeting, the By JOHN POND "El Grando” MECA National Collec- normally make all the SAM Champs together, and the SAM Victory Banquet. nuemmwere missing. The fact the contest did "T " stands for Trophies and were not turn out to be the biggest in SAM there ever a flock of them! Thirty-one history is no reflection on the SAM 7 events with trophies to fifth in each • Having just returned from that long boys. They did a super job. If you means 155 trophies to be given out, not haul to Westover AFB, Chicopee, Mass., weren’t there, too bad, you missed a to mention all the special awards. the most asked question has been, great time. Armstead did a fantastic job on mer­ "How were the SAM Champs?” For an “ A” stands for Accommodations chandise awards. Nobody went home answer, the 16th Annual O/T Champs which were outstanding, with the Rode- empty-handed! were GREAT! Let me spell it out for you. "G” stands for Good weather, Good flying, Good competition. Great cama­ raderie, and just all around Great fun! What else can you ask for in an old timer meet? “ R” stands for the Record number of events held. By and large, the SAM 7 sponsored Champs was the largest ever featuring 23 free flight events and nine radio assist events. Contest Manager, George Armstead, certainly set himself a mark to shoot at! "E" stands for Entries. At last reports the actual number of contestants was 152. Although this was the second biggest Champs for entries, this colum­ nist was a little disappointed the meet didn’t draw over 200 contestants. Of course, the number of entries was over 800. No question about it, times are 3. Typical lineup of modelers for the Texaco event. A great time to get acquainted with tough and quite a few fellows who fellow contestants, Westover AFB SAM Champs.

4. Chet Lanzo, Ohio, is all smiles after winning Texaco event. 5. Latest electric powered model by John Pond is Dick Shumacher C.D. Acciavati checks weight. "G ulliver". Familiar Pond color scheme.

36 MODEL BUILDER 8. Neat, legal launch, takeoff demonstrated by Sal Taibi and his Ohlsson 60 powered cabin Playboy. 7. Bert Pond with his unusual low aspect ratio excellent meet. Best part of all was that compressed air design. Note "brand" of air Ed had organized event directors to help tank being used! run the myriad free flight events sched­ uled for each day. Okay, let’s get on with the pictures. This time we are not going to let any other publication scoop us for photos. Many thanks are due to Harold Johnson, 1415 Trollhagen Dr., Minneapolis, M in­ nesota 55421. Incidentally, if you would like to get a copy of the photo presented, send Harold a buck or so. I am sure he’ll be happy to accommodate you. So, first things first! Let’s start with the people who made this contest such an 9. Steve Bocher, New Jersey w ith his hot outstanding success: Photo No. 1 shows flying scaled down Playboy Sr. our indomitable Contest Manager (with his back to us, natch!) tuning up the Novak and his crew. With a huge tent Super Cyclone in his Valkyrie. Armstead and numerous subsidiary canvas flys, the must have had at least 15 models ready free flight area was exceptionally well 10. The perennial Henry Struck, with his to fly, but was unfortunately unable to organized. {any doubts?) 1937 Wakefield design, just get them in the air because of the press As reported before, practically every recently approved by SAM. of running a contest. event had its own director. In addition to T is also Teamwork. This, to the Photo No. 2 depicts Tom Acciavati, this, Armstead had organized a retriev­ author, is the most important ingredient erstwhile SAM R/C Rules Coordinator, ing team that did yeoman work in of any contest. First you need a Contest in his capacity as Contest Director for getting many a model out of the trees. Manager who is willing to devote weeks the R/C portion of the Champs. Tom This gang employs the old bow and of his time setting up the contest site, was lucky to have the girls, Evie Wood­ arrow method. Retrieving is done as accommodations, printing of all bro­ man, Dorothy Cranieri, and Miriam follows: An arrow is shot over the limb chures, handling of all entries. . . Oh, I Clark to help out. Jim Clark sat in the last holding the model. A very light string is could go on forever with this thankless couple of days to also help out. Things attached to the arrow. Once the arrow is job! His very capable assistants; Ed ran very smoothly! looped over the limb, then successive Novak on F/F, and Tom Acciavati for Over on the free flight side of things, heavier cords or ropes are pulled over R/C. were more than qualified to run an we don't have a solitary picture of Ed the limb.

6. Bill Hamner and wife Phyllis, with his Orwick 64 powered Flying 11. "Krazy Karl" Spielmaker, with his unusual compressed air ver- Quaker. Nice models. Bill! sion of Army WW-II target drone.

NOVEMBER 1982 37 13. And another Pacific Ace! This one by Jack Guetens, 1Z Did we say "another Pacific Ace"? This time it's Joe Fitzgibbon, Cheshire, Conn. of G.A.R., Braintree, Mass., and Bob Schlosberg. Once a strong enough rope is over the previous winners engraved on a new limb, two fellows then work the rope base (and the trophy heavily polished by back and forth, literally walking the Jack Alten, 1981 winner), this is the model off the branch. Very few models trophy to win! were damaged this way! Of course, you Before getting over to the free flight had to be light on your toes to catch the side of things, this columnist wants to model as it fell out of the tree! run Photo No. 5 of his latest creation, an Needless to say, we’d get some shots 05 Leisure powered model known as of Novak and his busy little beavers. We “ G ulliver” . This was a 1941 design couldn’t let this go unrecognized! recently approved by the SAM Board of Wandering around the Texaco Event Directors as an old timer. With theslight is always this writer’s favorite occupation pot belly design up forward, this lent having pioneered it at the 1974 Lakehurst itself admirably to the compartment for Champs. Photo No. 3 shows a typical the six-cell battery unit. Although the lineup of the boys waiting to be weighed motor was brand new (electric motors and gassed up. In lines like this, many need breaking in too!) and an untried fellows have found it is a great way to get model, the writer was pleased to place acquainted with your fellow competitor. fifth. (It’s better than a poke in the eye.) More friendships have sprung up this Photo No. 6 reflects the family interest way! in the SAM Champs, as many many 16. Rodgers Barton, Texas, shows how to Of course, if we are talking about modelers brought their families along to fly five events with tw o models. More on this Texaco, we simply have to run a shot “ enjoy” the fun. The photo shows Bill in te x t. (Photo No. 4) of the winner, Chet Lanzo, Hamner, from Colorado, with an excel­ Of course, we have to have a little who found the only real good thermal of lent flying Flying Quaker. Although the nepotism in the column. Photo No. 7 the day. Others tried piggy backing, but lines of this particular design do not shows Bert Pond with an unusual low it was too late. scream beauty, the large tails, which aspect wing design for his compressed Actually, Lanzo’s win was most appro­ were such a detriment in free flight, are air engine with aluminum beer cans for priate, as he donated the E.R. Roberts just the ticket for R/C soaring in the the tank. Look carefully and you’ll find R/CTrophy (won in 1937!) to SAM to be clouds. Just think, a model that truly the name of the beer on the first can! used as they saw fit. Naturally, it fit right represents the old turkeys we used to Bertram P. Pond (actually no relation) of into the Texaco idea, so, with all the build and best of all, it is competitive! 128 Warren Terrace, Longmeadow,

15. Sid Sutherland, London, England, with his Mills 1.3 Diesel 14. Ted Dock, Warsaw, Indiana, with rare 1941 Goodrich Trophy powered "Colibri", a Louis Garami design. winner, from 1943 M.A.N. 38 MODEL BUILDER 18. George Murphy, Schenectady, N.Y. with his Atwood Super 20. C. E. Bowden's "Blue Dragon". Gee. John calls it ugly! Built by Champ 60 powered Ehling "4-1/2 Hour Flyer". Whatta name! Danny Sheelds. Yes, caption writers, Sheelds. Kind of a neat way to fly! could be heard quite clearly all over the We never get tired of publishing field. Other than that, this writer has to photos of Sal Taibi’s models taking off. commend George Armstead and his co­ This is such a truly unassisted legal horts for their selection of weather! launch, it is a real pleasure to watch. Right after Sal Taibi, we have to run a Photo No. 8 shows the Playboy Cabin we photo of his buddy, Henry Struck, as can talked about three or four months ago. be seen in Photo No. 10. Henry may be Sal was really primed for this meet and getting a little grey around the temples, won no less than six trophies! As Sal rue­ but he can still build and fly models with fully remarked, he left at least three the best. The only drawback to old age is models in the trees surrounding West- that you can’t seem to move as fast any­ over AFB. more when retrieving your model! Incidentally, by now, you the reader, The rubber model shown is a faithful must have gained some insight as to the copy of the 1937 model he sent to size of the base. Actually John Worth, England to be proxy flown in the Wake­ Executive Director of AMA and Ed Izzo, field meet. That was the year Fillon of District I Vice-President, showed up France won. This design has just recently with the idea of possibly getting the use been approved by the SAM Board of 24. The "Red Ripper", from Flying Aces, by of the base for the Nationals. As it stands Directors, so it won’t be long before the Gerald Donohue, Central Falls, R.l. Power is a now, Lakehurst NAS is tied up for at least plans are available. Wahl Brown Jr. Special. one or two years with the Army and its Continuing on with our parade of Mass., 01106, used to run a hobby shop contractors occupying the base with Champ pictures. Photo No. 11 shows in 1930 under the name of Peru Model their projects. “ Krazy Karl” Spielmaker with a most Shop in Peru, Indiana. Bert made the Photo No. 9 shows Steve Boucher with unusual compressed air design. He has best compressed air engines, as all the his hot flying scaled Playboy Senior and taken the outlines of a standard U.S. C.A. records will attest. at the same time gives some idea of the Army drone (as used for target practice) After all these years, Bert is again proximity of the trees. Actually, the and lightened it sufficiently for a C.A. making compressed air engines with viewer is looking directly across the field motor to fly it. At last reports he didn’t improved tanks (found out that he at the free flight headquarters. The run­ do too bad! didn’t need to wrap them with piano way is laid out for the prevailing wind, Carl has been a long time enthusiast of wire as metallurgy has improved). Bert but like Murphy’s law, if something can compressed air flying, always offering makes them in all sizes, shapes, and go wrong, it will! some inducement for fellows to build arrangements. The most popular model Actually, complaints about the and fly in this rare event. One year, he is his three-cylinder version that wins weather were quite moderate, consider­ put up a couple of hundred dollars to most of the meets. If any of the readers ing the contest was run in New England, get the boys out! out there are interested in acquiring a with no rain and only one windy after­ For the benefit of those who patronize compressed air engine complete with noon on the second day. That was a Golden Age Reproductions and don’t tank, write Bert for particulars and price. black day for free flights, as the crashes know who or what Joe Fitzgibbon looks

17. John Mc&viney, with his real nice looking Simmons Eastern 19. Forster 99 powered Super Buccaneer by Nick Notte, Hartford, States Gas Champ. Super Cyclone 60 engine. Conn. Very realistic flier! NOVEMBER 1982 39 22. Smart looking Wally Simmers designed Midwest Jabberwock, by 21. Bucky Walter, SAM 39, makes his Lanzo R/C Stick really Watt Hartung, Detroit, Mich. Simmers went for hot climb. perform in the Antique Event. like, Photo No. 12 is offered, showing were all English Tea boxes, as a reminder Speaks. Joe with a Modelcraft Pacific Ace 3 0... a of the Boston Tea Party. More darn fun! The MECA “El Grando” Collecto- great flying model! Joe has been quite SAM ANNUAL BUSINESS MEETING gether was also held in conjunction with successful in his line of flying scale plans, We mentioned the Annual welcom­ the SAM Champs. Quite a few collectors and of late, his kits to go with the plans. ing SAM Bean Feed held in rather displayed their wares for swap and sale, Business must be pretty good to have his luxurious quarters by the swimming but the average modeler simply wanting panel truck properly identified. He has pool, but we didn’t mention the Annual to find a “ runner” engine was shut out been very good to SAM 7 and has SAM Business Meeting. Highlights of by the $4 door fee. This, in this writer's sponsored many an event for that SAM the meeting included reports from the mind, was okay for the collectors, as they Chapter. Treasurer, the Engine Test Committee would require tables and chairs, but it While on Pacific Ace Models, Photo (Sal Taibi reported the Μ & P Forster 29 & did stop a considerable number of No. 13 shows Jack Guetens, of Cheshire, 35 motors were approved for old timers modelers from attending the “ El Conn., with his version. This very popu­ as was the Herb Wahl reproduction of Grando” . Gus Munich might look into lar class of models has really caught on the Ohlsson Gold Seal), and the an­ this inequity if he is interested in at­ back east. With good rubber again avail­ nouncement by Don Garafalow, Elec­ tracting more people to a National able, rubber powered models are really tions Tabulator of the following SAM Collectogether. making a comeback. officers for 1983-84. Getting back to the flying, the Texas Photo No. 14 only proves the point all President: Mike Granieri boys made a real killing in the R/C the more. Ted Dock, of Indiana, built Secretary-Treasurer: John Pondevents, winning 12 of 25 trophies. Whew! and flew this little-known design 1941 Eastern V-P: Woody Woodman To show how they came prepared. winner of the Goodrich Trophy (you Midwest V-P: RobertLarsh Photo No. 16 shows Rodgers Barton with know the other guys . . . not Goodyear). Rocky Mtn. V-P: James Thomas only two models, but with four setups to Main reason for not building this model Western V-P: Sal Taibifly five events. Traveling long distances is that it did not appear in print until 1943 Paste those names in your hatband always poses a packing problem, so the thus leading many modelers to believe it men, so you won’t forget it! more events you can incorporate in one was an ineligible design. New business under the incoming model, the more room there is in the Getting back to gas jobs, Photo No. 15 President, Mike Granieri, consisted of car. Barton was able to fly in Class A, shows Sid Sutherland all the way from donating $500 to the AMA building Class B, Class C (all glow events) and Merrie Olde England with a Louis fund. Woody Woodman made a pro­ Class AB and Class C ignition events. Garami design called the "C olibri” . posal to restore the office of Historian One thing for sure, he did keep busy! Although Sid didn’t win, he had a real with John Pond in the office. This was Couldn't resist showing a shot of this ball at the SAM Victory Banquet giving passed, but the actual duties and re­ writer’s favorite ignition model, the out awards to worthy people who ran sponsibilities were not outlined. A the contest. Appropriately, the prizes writeup should appear shortly in SAM Continued on page 80

23. David Hicks, Washingtonville, N.Y. built this neat Louie Garami 25. Vought V-143 built from Comet 504 kit plans by "Molecule" with sheet monocoque fuselage. P.A.W. diesel. Bob Schlossberg.

40 MODEL BUILDER CHAMPIONSHIP STICK MODEL

OLD TIMER Model of the Month Designed by: Al Casano Drawn by: Al Patterson Text by: Bill Northrop

• Writing the text for this feature each month is very time consuming. The article itself is usually quite short. The time consumed, however, seems to be unavoidably longer than necessary. Writing it only takes a few minutes, but when I open up the old magazine to refresh my memory on the featured old tim er, my eyes and mind begin to wander.Take this month,forinstance. . . Al Casano’s Championship Class C Stick Model was published in the May 1940 issue of Air Trails. On the cover was a three-quarter front view of a TWA DC-3, highly silhouetted against a sun­ rise or sunset, with a single round- roofed hangar in the background, com­ plete with drooping windsock. The inside front cover contains a full-page ad by Megow, announcing a huge contest. First two places were all-expense paid trips to the 1940 Nationals in Chicago. On the contents page (4) was an ad for the Class A .199 Bantam engine, Ben Shereshaw’s pride and joy. The next 20 pages were all devoted to full-scale aviation; ads for aviation schools, photos of the latest in military aviation, a story on early flying in the stratosphere, articles about lightplanes and soaring, and even a short fictional adventure about two air cadets competing for

Continued on page 84

NOVEMBER 1982 41 A Ward Marine Offshore 33 primed with K&B Super Poxy white Ward Marine Offshore 33 with three-color paint scheme; yellow, red, primer and ready for final coats of paint. and orange. Very visible on the water. R/C P O W E R By JERRY DUNLAP BOATS

SPORT 40 - that no outrigger designs will beallowed. unlimited hydroplane was not very THE CANARD CONTROVERSY When I think of outrigger designs, boats successful. At some of the races it was The Sport 40 Class of the North Ameri­ like the Wing Ding, Crapshooter, Water unable toeven qualify and I’m not sure it can Model Boat Association has received Spider, Gator, and Hughey Rigger come ever completed one heat of racing some degree of coverage in this column. to mind. during the entire season. As a full scale It has been my belief that this class One of the boats entered in the Sport unlimited, the canard design was not provides a good entry level for those 40 Class at the 1982 N.A.M.B.A. Nationals what one might consider a blazing wishing to compete in a class of semi­ was the canard design hydroplane success. scale type unlimited model boats. In belonging to Ed Fisher. The canard It should be noted that the full scale some areas, the class has obtained quite design features rear positioned sponsons 1981 “ Circus Circus” canard unlimited a following of participants. as compared to a conventional hydro­ was designed by Ed Fisher and his dad, Although most of the rules governing plane having front sponsons. The boat’s Charles. Mr. Bill Bennett, one of the the class tend to be somewhat general in appearance is more like something out owners of the Circus Circus Hotel and scope, there are some specifics regard­ of “ Star Wars” than a boat that races as Casinos as well as the unlimited hydro­ ing length, engine type, and hull design. an unlimited hydroplane. However, the planes, first saw one of Ed’s canard The rule concerning hull design became boat is a model of the 1981 “ Circus hydroplane models run in 1978. He was a focal issue of a protest of a boat at the Circus” unlimited hydroplane that sufficiently impressed to attempt to 1982 N.A.M.B.A. Nationals conducted in participated in the 1981 American Power build and race a full scale version of Ed Los Angeles in early July. One of the Boat Association Unlimited Hydroplane Fisher’s model boat. During the 1978, rules dealing with hull design specifies circuit. The 1981 “ Circus Circus” 1979, and 1980 unlimited racing seasons,

Plain paper is used to cover bottom of this Offshore 33 to protect Top deck is masked off using Flex-Mask and regular masking tape, it from overspray.

Flex-Mask is used to define color separations on this Offshore 33. Masking tape is used to cover the areas that have already been Base coat is yellow, with color panels of orange and red. painted. 42 MODEL BUILDER the “ Circus Circus” hydroplane was a conventional cabover design. In 1979, the team had its most successful season. I believe the boat finished third overall in season points and driver Steve Reynolds was named Rookie Driver of the Year. (It should be pointed out that the full- size 7987 Circus Circus hydroplane was never actually completed according to the Fishers’ design, having been modi­ fied before completion by other “ experts." It would have been interest­ ing to see the results, had the Fisher design been left alone, wen) The basis for the protest against Ed’s canard Sport 40 was the contention that the boat was actually a “ reverse outrig­ ger." The canard’s sponsons are affixed to the back of the hull by means of a Masking tape and paper protect areas already painted, as last color is applied. stubby wing rather than booms or extensions used on front sponson out­ rigger designs. Apparently there were some who felt that the design provided an advantage over conventional Sport 40 boats. There’s no denying the boat is fast. Ed Fisher holds the Sport 40 record with the boat at 1:18.57 for the five lap, .9 mile oval. That record time is only about five seconds more than the record Ed holds in the 40 Open Hydroplane Class. The best time I can recall for a conven­ tional Sport 40 hydro is 1:31. As you can see, the time difference is considerable. Of course, one can't protest a boat because it's too fast. Therefore, the protest was based on the hull’s design. As one of the three members of N.A.M.B.A.’s technical committee, I was called upon to render a decision about Another view of the Ward Marine Offshore 33 in its three-color yellow, orange, and red paint the classification of the hull. Actually, scheme. Can't say you didn't see it! the question was more, "Is the boat an rather unhappy with the outcome as hull designs in the Sport 40 Class. The outrigger?” Well, I have an image of their protest was not allowed. This first solution would be to continue to what constitutes an outrigger model incident brings up a challenging issue in allow any hull design that complies with hydroplane and I listed that earlier in what is supposed to be a restricted class the existing rules. If the hull configura­ this discussion. Okay, if it isn't an of model boat racing. What happens tion ran as a full scale unlimited and it’s outrigger, what is it? I stated I felt it was a when someone comes up with “ a better not an outrigger, it can run in Sport 40 hydroplane employing reverse suspen­ idea?” If the individual can comply with Class. The canard fits these rules. sion when compared to a typical hydro­ the rules of the class and still come up The second solution would involve a plane with sponsons attached to the with “ a better mouse trap” should he be rewriting of the existing rules to restrict forward section of the hull. As I under­ penalized for being innovative? Cer­ the boats to hull designs that comply stand the final outcome, the protest was tainly there are no easy answers to these with what might be termed "conven­ disallowed and the boat declared legal questions. I can appreciate the concern tional designs.” So, what’sconventional? for N.A.M.B.A. Sport 40 Class. At the of the competitor who brings out his I would say boats that have a design time I’m writing this article, I don’t even conventional hydroplane design and configuration like the round nose Slo- know how the boat did in the class. has his boat devoured by something he Mo-Shun type boats or the cabover, Since my opinion was given over the doesn’t even recognize as a model picklefork designs like the Miss Bud­ telephone, I don’t know the type of hydroplane. weiser or Atlas Van Lines. N.A.M.B.A.’s reception the decision received. It It appears to me that there are two would seem that some folks would be possible solutions to problems regarding Continued on page 84

Automobile body putty used to fillet wooden air dams added to Automobile spot and glazing putty applied to Prather 3.5 Tunnel Prather 3.5 Tunnel. after the boat was primered. NOVEMBER 1982 43 R/C AUTO NEWS By DAN RUTHERFORD

PHOTOS BY AUTHOR MRP's latest lightweight, molded Lexan body shell for the Tamiya off-road cars. This is the Ford 150 xlt. • Not much shaking this month; the out. It worked quite well at the recent FUNNY STUFF... Associated RC500 is only half built as I ROAR Nationals where Team JoMac, We were back at the ROAR Nationals write this, so no test of it this column. with Ralphie Burch driving, won Prod­ at Rattey’s a few years ago and I was Associated's other new car, the RC12Í, uction class, as well as being Top Quali­ kinda traveling with the JoMac/MRP still has to get a thrashing before I can fier, with a water-dipped motor. Burch’s Racing Team, as I knew them better than commit thoughts to paper. So we will motor was fast enough that his quali­ everybody else. The team of Pete and take a trip down Sillyness Lane where I fying time in Production would have RePete Fusco was then sponsored by tell you of some of the funny things I also placed him as Top Qualifier in MRP in 1/8 racing, and as the race was have seen happen in RC car racing. Modified class! In the Production class it almost in their backyard, they were out First thing is actually a recent hap­ is known that at least 8 out of the top 10 in force. Now before we get too far in pening, the deal where Floyd Manley, were using water-dipped motors. When this story I have to tell you that I really writing in the M.A.N. RC car column, Stock class came up, quite a number of like Pete and RePete and there is just no referred to the water-dip method of the few remaining doubters of this denying their effectiveness on the track electric motor break-in as being dumb method’s effectiveness had seen the when there is racing to be done and and it could quickly ruin a good motor. light with one electric motor wizard in races to be won. But at this time in their There is also some confusion about particular putting it to good use . . . And careers they both had 1/8 cars that exactly what I said in the article that I have a picture to prove it! You won't looked like rolling disasters. Way down detailed the water-dip break-in method; find the picture with this column, I’m deep they were MRP cars, sure, but they I happen to know where the confusion is saving it for a special time, as well as had been modified so much as to be coming from but prefer to say only that waiting to see how Mr. Manley handles barely recognizable, the caked-on nobody other than Team JoMac was the situation from his end (of course I layers of dirt kept even Bob Welch reported as having actually used this wrote to him!). (designer of the car) from easily identi­ method of break-in. If you are confused (There was also a sketch illustrating fying them and there were certain, uh, please go back and reread the original motor water-dipping in the latest issue “ unique" features, such as the receiver article in the April '82 issue of MB. of the lapanese magazine R/C Tech­ mounted in the center of the car, Racers, the water-dip method does in nique. However, I don't know what they directly on the pan. That in itself is not fact work as so many of you have found were saying about it! wen) real unusual, or wasn’t at the time, but in

\

Springer rear conversion kit for MRP's 1/12 racer, number 529 gets NiCd conversion pack for Kraft K-Line radio system. Receiver pack it, price is $14.00. is five-cell unit . . . what the serious racers want.

44 MODEL BUILDER was getting fuel to the carb, needles were open and not blocked, the ammeter said the plug was OK . . . It just had to make noise. I fiddled with it for 10 minutes or so. Nothing. Then, when blocking off the stinger on the pipe to force fuel from the tank to the carb, noticed that there wasn’t any air at all coming through the pipe when the engine was being cranked by the starter. I mentioned this to Dick. There was a long pause... “ Hey, Dan, you’ve got four cars of your own to get sorted out, I’ll just go work on it some more myself.” "I thought you said you didn’t have the engine apart during the winter.” "I didn’t. Here, I'll take the car back to my pits, you've spent enough time on it already.” “ Wait a minute, Reed, I think we’re onto something here, I’ve already got enough time invested that I should be allowed to figure it out." Funco Buggy from Parma. Latest 1/10 off-road .050 thick body w ill out-crash competition. “ No, no, I’ll just go back and work on it some more, it has to be just a simple this case the tank normally was placed previous evening gluing up some new problem.” where the Petes had the receivers. No sets. And he didn’t have much spare So I let him take the car, planning on problem, Pete simply strapped the fuel time (evidently) as there was dried glue sneaking up on him just as soon as he tanks on top of the receivers with rubber not only on the tires and wheels, but on had time to undo whatever he had done bands! Like I said, the cars were dis­ various parts of cars. I had wondered during the off-season. And you might asters, it was difficult to believe they how he was going to true the tires as have guessed the problem already. Dick would actually run and yet come time there wasn’t a tire machine around, and had very carefully made a new gasket to for the main events one or the other, or about the time I forgot about it, there go between the exhaust flange on the both, would be there and going for a was heard the sound of a snarling K&B 21 K&B 21 and the header pipe for the National Championship. being run at full throttle. Not an unusual muffler. All neatly trimmed on the With these two cars sitting on a table sound at a race track, but this time the exterior... But no hole in the center! right next to the gate to the pits, a couple screaming (this was a year or so before Living up to my nickname of Dirty Dan, I of RC guys, airplane types, stuck their we had decent mufflers, remember) was made sure to tell everybody at the track heads in to see what was going on. Don coming from the pit area. When, after a that day what he had done, wrote about McKay and I happened to be sitting minute or so, the moaning of the engine it in our club newsletter, and now I’ve close to the gate and one of the visitors hadn't quit, a few of us walked over to told you. He really should have let me asked to see an Associated 1/8 car, he see who was doing the rod test and why. completely diagnose the problem had been reading RCM and heard they Here was Pete, sitting flat on the ground instead of sneaking off like that. .. were the hot tip in race cars. The two holding one of the cars by the rear After a race in Portland, Oregon, a guys looked at the cars, looked back at bumper, the engine was singing at high bunch of us were at a pizza place, each other, looked at Don and me, and throttle and he was casually using the standing in line waiting to order. Dick back to the cars again and obviously asphalt in the pit area as a sanding Reed (the same) and I are talking when couldn’t believe what they were seeing. board! I just couldn’t believe it, but then Continued on page 87 They left the track after coming to see he takesthestill-runningcar,which now the state-of-the-art in RC cars thinking has trued rear tires, over to a table, hangs that the race cars were whittled out of the rear end off the edge, advances the y > aluminum with an axe. . . a very dull axe. throttle once again and with a hand­ A couple of days later it was time for held X-acto knife trims the excess rub­ another qualifying run or two and the ber from the inside and outside of the Fuscos had run out of glued and trued wheel. When finished, and with the rear tires. So Pete spent part of the motor finally silent (but the cloud of exhaust smoke still very heavy in the air), Pete seems almost as surprised at the crowd he has drawn as we are at what he is doing .. . Not many things surprise Pete, I guess he figured everybody trued their tires that way! Our club always has a Play Day or two prior to the start of the racing season, just to give everybody a chance to get the race cars sorted out without the pressure of actually racing. As I carry the reputation locally of being a Motor Wiz, during these Play Days, a number of racers w ill be by to get something sorted out. This day Dick Reed, a good friend and equally good racer, came over complaining that no matter what he tried the motor just Parma off-road knobbies. Will fit over Tamiya wouldn’t fire. I checked all the usual Heavy Duty 1/10 scale shocks from Parma, two-piece wheels. stuff, as Dick already had, the motor fit Tamiya buggies, smoothes out bumps. NOVEMBER 1982 45 SIIPIRSIABIIITY

By CHARLES McCUTCHEN

WHAT CAUSES SUPERSTABILITYÍ Airfoil theory says this cannot happen. angle of attack rises. The ballasted plane is a symmetric But the theory assumes that the airflow At some point, as the bubble gets airfoil. According to airfoil theory, a stays attached to the wing surface. longer, it gets unstable, as evidenced by symmetric airfoil has its c.p. at the 25% Superstability occurs only if the leading the pitching undulations of the model. chord point at any angle of attack below edge of the wing is fairly sharp. Airflow Presumably the bubble forms, is at least stall. It is therefore neutrally stable. The coming up from under a sharp leading partly swept away, and then reforms. c.p. of a negatively cambered wing is edge fails to follow the surface. Instead, One cannot be certain that this does not forward of 25%. It moves with angle of it curls round a separation "bubble", a occur with the balance farther forward attack, travelling back as the angle of miniature roller of air, becomes turbu­ than 30%, the value behind which visible attack is increased, which makes the lent, and comes down to the upper undulations occur. Creation and sweep­ wing stable. Ordinary flying plank surface (Schmitz, 1942; McCulloch and ing away of bubbles may occur in too models and full-sized flying planks are Gault, 1951). rapid succession to make the model stabilized this way. They have either At low angles of attack the bubble is undulate. The four-part Fig. 6 is negative camber or a turned-up trailing small. In effect, it seems to add a ridge to Schmitz’s interpretation of the flow edge. In the models, the balance is at the top of the leading edge, giving the patterns at different angles of attack. 20% or farther forward. The c.p. of a wing negative camber, and moving the Schmitz tested various airfoils in a low positively cambered wing is aft of 25%. It c.p. forward of 25%. As the angle of speed wind tunnel. Fig. 7 gives his results moves forward with increasing angle of attack rises, the bubble gets longer and for a flat plate. At a Reynolds number of attack, which makes the wing unstable. thicker, and apparently gives the upper 42,000 the plate has a stable center of The ballasted plane will fly with its surface of the wing as a whole an pressure travel starting at 22% of the balance, and therefore its c.p., any­ effective positive camber. The presence chord at a lift coefficient of .1. This where between 22% and 37% of the of the separation bubble can be demon­ behavior is not wildly different from that chord. Its c.p. moves aft from 22% to 37% strated by spanwise threads on the of my ballasted plane shown in Fig. 3, as the angle of attack rises. The wing acts upper surface. They reveal a region of whose superstability starts at a lift as if it had variable camber that changed forward-moving flow next to the surface coefficient of .264 with the c.p. at 21.4% smoothly from negative to positive as extending aft from the leading edge. It of the chord at a Reynolds number of the c.p. is moved back through 25%. extends farther and farther aft as the 29,000. Schmitz's text contradicts his data on this point, saying, on page 107 in TRANSITION RANSITION the translation, that the center of pres­ LAMINAR TRANSITION POINT VORTEX , sure is "fixed from -6° to +6° angle of TURBULENT SEPARATION TURBULENT SEPARATION I attack" (corresponding to lift coeffi­ I I IBOUNDARY IBOUNDARY LAYER cients of -.4 and +.4). Schmitz was aware 1 M LAYER that ballasted planes would fly stably, —•~rr~‘ ^ —

• Our lead-in line this month is by Doug starts. Actually, in the case of the West Junior Chris Scott, one of three to "go the distance" during the West Baden 24-hour Lamont, Editor of SOARING magazine, Baden atrium indoor site R.O.T. might Peanut Scale Gran Prix. and is perhaps an appropriate introduc­ be more suitable, since the "ground” is tion to some contest reports and news, in fact, the world’s largest terrazo tile categories. Results at end o f column. which we think may be enlightening floor! This option was well-received, Special Awards: even to non-competitors. and proved quite rewarding to some of Best Proxy Fliers: Frank Scott and Dave PEANUT LE MANS the lesser-duration type models. Lindley. This year’s West Baden, Indiana, 24- In keeping with the relaxed atmos­ Best Achievement: Jack McGillivray hour Peanut marathon was another phere associated with Peanut meets, for his Yugoslavian twin, which turned in success, attracting some 73 entries, were such features as the rendering of the remarkable duration of 1 minute and representing five countries including classical music via tape recordings; the 57 seconds! Canada, England, West Germany, Swit­ serving of ice cream floats, courtesy of Best Duration: Millard Well’s Wee zerland and the U.S.A. ThankstoContest Heather and Suzan Arak, and even a Bee, 2 minutes, 33 seconds. Director Dr. John Martin and partici­ celebration of proxy chairman Mike Grand Peanut: Warren Shipp’s Avro/ pants Charlie Sotich and Frank Scott, we Arak’s birthday. Cierva C.17 Autogiro. are pleased to present the results and Classes flown were; Pioneer (for pre- A personal thanks to my proxy crew, some of the event’s flavor. Complete WWI aeroplanes); Warplanes (WWI and consisting of Chief Pilot Charlie Sotich listings are given rather than the more WWII combined, this year); Golden and able assistants Don Lindley, Frank usual abbreviated results, to emphasize Age; Modern; Weirdo, and a special Scott, Chris Scott, and Vito Garafalo. If the scope and variety of this "occasion.” Fike/Lacey category intended to purge any readers may be considering next Note that some seemingly unlikely the Modern class of these persistent year’s Gran Prix, the time to get started is subject choices were proven remarkably winners. Note that canards, once NOW! And if you haven't tried partici­ effective. considered Weirdos, had proven so pation by proxy, you’re missing a lot of New this year from the sponsoring efficient that they are no longer given truly remote-control fun! M.I.A.M.A. club, of Florida, was a rule any special consideration, but must offering a 10-second bonus for R.O.G. compete in their regular vintage Con tinued on page 74

CO2 powered Farman Jabiru, by Bob Ebbe Jensen, Johanneshov, Sweden, displays tw o of his flying scale C02 models. On left is a Clemens, on its way up the dome of the 100 Halton "M ayfly", on the right, a Crawford monoplane. year old West Baden atrium. Frank Scott photo.

48 MODEL BUILDER

Author/designer Mark Fineman releases the stubby little CR-3 for another stable flight. CESSNA CR-3 By MARK FIN EM AN . . . Winner of several F.A.C. Thompson Trophy competitions, and flying well enough to go O.O.S. at the 1982 F.A.C. Nats, this stubby racer is a real performer . . . once trimmed. • There are certain airplanes that I think short nose moments, present similar radial encased in a tightly fitted cowlj of as ‘ brutes,'’ usually radial-engined problems to both the designers of real with raised rocker arm blisters. In its; jobs that look like airborne power- aircraft and to model builders. Since brief career, the CR-3 won every race in plants with airframes lacked on as an these competitions are limited to scale which it was entered and established a afterthought. Of course the Gee Bee models of planes that actually raced, new world’s speed record for aircraft of racers fit this description, but so too do when the rule change was announced, 500 cubic inch displacement, 237.35] some lesser known Golden Age racers, modelers had a tough job of picking an mph. Its career, alas, lasted little mor such as the subject of this article. Ces­ appropriate subject. than two months, when Livingston wa sna’s strictly business little powerhouse, The CR-3 forced to bandon the fiesty little ship the CR-3. Although we usually think of Cessna after its landing gear failed to com When the Flying Aces Club's mass as primarily a manufacturer of light- down on a flight to Columbus. Ohio launch air race events came to be planes, for a short period in the mid-'30s The pilot went safely over the side, but dominated by inline ships, particularly they were deeply involved in the the CR-3 augered in at several hundred the Chambermaid, the FAC high com­ national mania called air racing. The miles per hour. mand modified the rules so as to limit CR-3 was the last of their custom built The Model the Thompson Trophy to radial-engined racing ships, and was created especially The history of the CR-3 model i$ aircraft and the Greve Trophy to inlines. for Johnny Livingston of Monocoupe almost as intriguing as that of the real Radial-engined planes, with their fame. The little red-and-yellow speed­ racer. Several years ago, Dave Slot generous frontal cross sections and ster was powered by a 145 hp Warner designed a Peanut CR-3; a good lookin

Strictly business scale model. After two years, the cockpit was still This model is somewhere around Johnsville Naval A ir Station, Penn-' not detailed. sylvania. where it flew O.O.S. during 1982 F.A.C. Nats.

NOVEMBER 1982 Note return address and phone on trailing edge of left wing. Bright No, it's not a case of the blahs! Mark is showing why it's important yellow and red colors should make it easy to spot. to use the nose plug retainer rubber band. little bird that never quite lived up to its John’s model spanned 24 inches and Peanut version, it was slightly smaller promise. When the air race rules were was a devilish handful. Its fuselage was than John’s (22 inch span), sported a modified, FAC competitors scrambled so large in diameter that his "mechanic” different airfoil, enlarged tail surfaces, for appropriate subjects, only to find needed two hands just to hold on to the and more robust construction. As the air that existing plans suffered numerous peg while John cranked in the turns . . . races are not strictly scale events, I tried shortcomings. FAC pilot John Stott and when that wad of Pirelli occasionally to make my model sharp looking but scaled up the Peanut plans of Uncle disintegrated, the spectators were without slavish attention to detail. After Dave, making appropriate modifications treated to a sight reminiscent of Johnny more than two years, I still haven’t along the way. His CR-3 was no small Livingston’s racer excavating a hole at gotten around to detailing the cockpit! success, capturing the Thompson 400 miles per hour! Although the model was completed in Trophy at the first modified-rules com­ Although my version of the plane was petition and at the 1980 FAC Nationals. also based on an enlargement of Dave's Continued on page 92 John, like many scratch builders, had not made meticulously detailed plans, and those of us who wished to duplicate his successes were left to our own devices.

The CR-3 doing its up, up, and away thing. After losing the CR-3 at the F.A.C. Nats, Mark immediately got to work on a new one, and so A smooth and steady flier. we are privileged to have these skeleton photos.

54 MODEL BUILDER Leon Bennett launches his magnificent (90" span) DH Moth Minor. With 24 strands of 1/4-inch rubber, it weighs around 24 ounces. What a sight in the air!

FREE FLIGHT SCALE By FERNANDO RAMOS

• Bill Noonan and I just got back from same model box I carried to Dayton a writing that company what I think of the 3rd Fying Aces Nationals, held at couple of years ago. This, of course, their system, and plan to use a limousine johnsville Naval Air Station, in Pennsyl­ didn't make any difference to him or any service the next time around. My wife vania. This was also the site of the first others standing around working for the ended up driving us to the airport. F.A.C. Nats. The day of our departure, I bus company. What was really aggravat­ When a trip starts out like that, you got my most understanding wife to arise ing, at that early hour there weren’t too wonder what is in store for you later on. at 4:30 a.m. to drive us to the Disneyland many passengers, so there was enough The flight there was with TWA, and they Hotel in order to get a bus to LAX space to carry several coffins let alone a saw to it that we were constantly fed airport. While Bill was purchasing our modeling box! What I didn’t know until during the whole trip. When we got to tickets, I was being hassled by a fairly my return, is that the maximum size of Philadelphia, it was raining pretty hard. young bus driver who refused totakeon any luggage or parcel is a scant We rented a car and drove to War­ my model box. His excuse was that it was 13 X17 X 32 inches. Most suitcases exceed minster, which was home base for most too large to carry on board. This is the those numbers! Needless to say. I'm all of the contestants. We were expecting Bill Stroman and Bob Haight to arrive somewhere around 1 a.m. in the morn­ ing. As it turned out, it wasn’t until about 2 a.m. that we heard the door open, and two tired modelers arrived. You might be wondering why we didn’t go together. They decided to leave from Las Vegas, as Bob lives there. As we arrived early, we had a chance to acclimate ourselves to the heat and humidity typical of that part of our country. We also had a chance to get a little extra test flying to see what the excess moisture did to our models. It may be psychological, but that air does have a negative effect on the way the models perform. Our models are more Mass launches are always spectacular, these being WW-I types. Bob Haight in foreground used to the air with particulate matter flying a Pfalz D -lll. floatine around in it! We were led to an

Ralph Kuenz and his Lockheed Altair. First Walt Eggert flew this .020 powered Fokker Mark "Cessna CR-3" Fineman with his drop "Wooden Wonder" with retracts. DR-I triplane. off gear version of the Winnie Mae. NOVEMBER 1982 55 Allan Shanzel’s C02 powered DR-I is an excellent flier. Another photo of Leon Bennett and his "Super Jumbo" Moth Minor. A new class? excellent flying site by Bill Kalp, who was let me say, that there is nothing more simultaneously. The quality and caliber one of the men responsible for arranging gratifying than seeing many friends who of models is outstanding! They seem to for this grand event. It is interesting to you don't get to see more than once get better each time I attend one of note that the people back there are so every two or three years. . . and meeting these gatherings. Most of the models are helpful and congenial. Everyone takes new ones! Such is the case with the rubber power, and range in span from the time to help no matter what the issue F.A.C. Nats .. . with flying scale being Peanut to Jumbo. One exception is Leon may be. the focal point. It’s worth every penny Bennett. If you remember, Leon had a By late Friday afternoon, the arrival of spent to have this experience!! D.H. Moth Minor of 50 inch span that the contestants started at a regular pace. I hope the pictures I've submitted will flew like a bird at Dayton. This year he By dinner time, most everyone had tell the story. In the two days of flying, it had another Moth Minor, but this one arrived. One large suite was reserved so is almost impossible to cover all of the was a scant 90 inches in span with a 22 or that we could all get acquainted. Fellas, exciting moments that are taking place 25 ounce weight (I can’t remember

Chuck Moses preps his "Schlepp", Swedish target tug aircraft. Unusual camouflage markings on this enlarged Stahl P-51 by Chuck Moses.

Wee W illie Stroman isn't really leaning on Srull's jumbo Santos wing Don Srull did well with his various sizes of Santos Dumonts. to test the strength, he's helping stuff wound rubber.

56 MODEL BUILDER Seen at the Silver Hill facility of the Simthsonian; Fieseler Storch. Arado 71. Note seahorse insignia.

Nice looking Hurricane. Unusual and rare 1922 Bellanca CF. Wing/strut is a trademark.

which!) He’s honestly trying for quarter- exchanged as modelers headed for scale rubber, and he is sensibly doing it home. At this time, no one yet knows in increments. Needless to say that it where the ’84 F.A.C. Nats will be, but I takes some pretty fancy equipment to know that I want to be in attendance. I wind 24 strands of 1/4 inch rubber! It’s would recommend that you start saving quite a sight to see in the air. One now and plan for one of the greatest remark is that the larger the rubber is, experiences in modeling! the more fragile it becomes. Unlike an Bill and I did not Ftead for home R/C model, where "beefing’’ is a com­ immediately, but were given a ride to mon practice, a rubber model can’t Silver Springs, Maryland byTomSchmitt. handle the additional weight. This was to be our home base while we The most respected name in scale toured the D.C. area and visited with modeling is that of Earl Stahl. He has friends. Ray Rakow came by our motel been to each of the F.A.C. Nats, and his and escorted us to the M etro, and modeling influence can be seen in showed us how to get around by this dozens of models flown. I wish I could convenience. We spent most of this day Twin row Anzani 10-cylinder engine. Note remember how many scale models he at the Aerospace museum and library. air scoops and offset prop blades. has designed and were published in the You can’t believe all of the resource model magazines. . . it’s a lot more than material that is available to modelers. It you can imagine! is a most frustrating experience to have arrangement for a tour of the Paul By late afternoon, you could see the so much information at your finger tips, Garber facility. There are no words to heat and humidity takes its toll as but not have the time to see a fraction of describe the goings on at this facility. All modelers headed for the motel and the it! That evening, Ray drove us to Don I know is that I saw a lot of airplanes, and swimming pool. That evening there was Srull’s home, where we visited with Bill parts of airplanes, each with its own a banquet honoring the winners of that Winter and John Worth, among many particular history . . . simply unbe­ days events. They also handed out a few other friends. Don really has a fantastic lievable!! copies of the ultimate award, the Blue workshop and collection of prize­ From Silver Hill we headed for Fairfax, Max. It requires 16 wins to receive this winning models. Don is truly an excep­ Virginia, to visit with Hurst Bowers, at most prestigious of awards. These are tional builder and flyer, as well as the hospital where he was recovering accumulated wins in F.A.C. type of designer, and he has the trophies to from open heart surgery. I'm happy to contests. prove it. report that Hurst is doing very well, Sunday's flying was no different than Tuesday’s schedule was an eventful looked good, and was headed for home Saturday’s, in respect to the skies again ride out to Silver Hill with Bill Stroman in a day or two. He tried putting off the being dotted with scores of beautiful and Bob Haight. Eventful, because we surgery until after the F.A.C. Nats, but models. Like so many things is life,every got lost several times and got a flat tire his heart didn’t see it that way. From good thing has to come to an end, and on one of the expressways. When we here, Don came by to pick us up and such was the case for another excep­ finally arrived, we were met by Allan tional F.A.C. Nats. Many goodbye’s were Schanzel, who made the necessary Con tinued on page 90 NOVEMBER 1982 57 Gosh, Jerry, I see you've snagged your lines on my handle . .. why don't you just let go and I'll see w h a t I can do.

+4------« = — By DIRTY DAN" RUTHERFORD ontrol line PHOTOS BY CHARLIE JOHNSON

• On the off-chance that a few of you which can be a problem with other will take to heart some suggestions exotic cleaners. concerning winter storage of your With the exterior of the engine models and engines and related sup­ cleaned, you now have to decide port equipment, that is the direction this whether or not to take it apart. Per­ column will take. sonally, I used to disassemble engines at For most of us, the motors are the the drop of a hat just to fiddle with the most important of all of our modeling internals. No more; if the sucker is still equipment, as you gotta have good ones putting out the power and starting to be competitive and they are fairly reliably, it is left alone. Still, even with an expensive pieces to buy, seemingly engine that is doing the job, it is sug­ costing even more if they need to be gested that the back door be removed replaced, especially if a little preven­ for a look at the rod, more specifically tative maintenance would have saved the lower end bearing of the rod. It the replacement costs. The motor should seems that in all high-performance first be removed from the model and engines, one of the most highly stressed cleaned well. Many ways to do this; I just pieces is that rod. and as access to it is so plug the exhaust and venturi and spray easy, why not check it once in awhile? on a household degreaser, finding that With the back door off, squirt some Fantastic Spray Cleaner works. Squirt it alcohol or other mild solvent in, just to on, let it sit for a few minutes and hose it remove any traces of oil. A light film of off with water. If it doesn’t come clean, a oil between the crankpin and the lower second application, as well as some rod bearing could fool you into thinking brushing with a scrub brush, should the clearances are OK. With the oil make it look like new. Recently I had an gone, grab the rod with your fingers (if What's wrong with this picture? Just a min­ engine that was being cleaned and while you can); most of us have to use a tool. I ute, Chuck, I'll just loosen that wing nut and all the normal junk came off OK, there slip fuel tubing over the jaws of a grab my handle again. were a lot of cooked-on stains on the hemostat and use this to jerk up and to scratch and otherwise tear up the rod head, presumed to be from the oil in the down on the rod, using a combination of when checking lower end clearance, fuel. This can be very difficult to remove, “ feel" and actually watching the rod’s hence the soft-jawed hemostat. although it did finally come off after movement to see if the clearance is The rear bearing can be looked at, soaking the head in Sears Gum and Pitch within tolerance. Admittedly, this is not even though just looking will rarely tell Remover, a product normally used to a super accurate way to do it but it is still you anything about it. If the crank turns remove gum and pitch (surprise, sur­ possible to determine whether or not freely, no notchiness is what you are prise) from high-speed wood working the rod is OK, questionable, or ready to trying to detect; all you can do is look tools, such as router bits and saw blades. pop. Any rod that is questionable should closely to be sure that the bent-over tabs Some scrubbing was necessary,although also be regarded as having gone bad, so on the retainer are all still there, as they not much, and the remover didn't seem there are only two choices here. And it tend to fly off first and then the retainer to have any bad effects on the aluminum, should be obvious that you do not want lets go in a big way with large chunks of it

58 MODEL BUILDER getting wedged in between places they don’t belong. If the forward face of the back plate is unmarked, just install a new gasket and close 'er up. Scratches from the crankpin or rod hitting the plate indicate the need for an extra gasket; just be sure both of them are new. When installing the back plate (or any other parts), it is a good idea to use new fasteners, especially if your motor doesn’t already have alien- head cap screws. The head can be pulled off for a look- see, even though you won't see much and are taking the chance of moving the cylinder a slight amount, plus the always- a-hazard (at least with some motors) chance of finally stripping thethreadsof a hole in the crankcase. Better to just check to be sure all the head bolts are tight, but if you can’t resist a look inside, check for scratches on the interior wall of the liner, detonation damage to the top of the piston and the combustion chamber, and anything else that looks out of the ordinary. When replacing the head, it is best to use new head shims (gaskets), but not absolutely necessary. A in't Rat Racing fun? Larry "Conan" Hill thinks it is just great but Forrest Adkins thinks other­ Do be sure the new ones are the same wise. About 20 laps of this had everyone running for cover at Nats. After Larry taught Forrest thickness as the old. a lesson (for trying to pass) he let him fall back to his rightful position (second place). What to use as an oil for storage is an old debate; everybody has their favorite all the tubing with new stuff. . . it is just be stored is one of those 19-point Stunt brand. The really important item, how­ too cheap to consider taking chances. . . jobs, no worry about where to store, ever, is to use an oil of some kind, and to I prefer Prather’s line of silicone tubing you’ve probably already got a dandy not have any fuel left in the motor. The for almost all applications. spot in the living room for it. . . nitro evidently causes some damage that To avoid alternate shrinking and Tools just need to be cleaned well, shows up as corrosion. The alcohol expansion of the covering, again storage very few of them are used only forflying serves very well to draw in water and that is not the best way to go. Not as big a sessions, so will be seeing a lot of use in causes rusting. And don't use a castor problem as it may seem; with plastic the building season. Fuel won’t be used oil, it just gets all gummy over the winter. films it just means that come flying much; do your best toget each type into Doesn't seem to actually hurt anything, season you will have to reshrink the as small a container as possible to avoid but it usually means totally disassem­ covering (something you may have to do having a lot of dead-air space in the bling the motor to get the stuff cleaned in any case) and there is the argument container. While doing this, filter all of out. I use Marvel Mystery Oil as an after­ that by storing the model in the garage the fuel through a coffee filter or run oil, and also use it as a storage oil. where it is mostly cold but can also be something equally appropriate. I can Just slop the stuff in through the plug warm once in awhile, the structure and recall Charlie Johnson using a gas of hole and the venturi, turn the motor covering will tend to stabilize over the some kind, normally used to keep over a bunch of times to spread the oil months. Could be, just be sure to check everyplace, wrap the engine in a bag of for warps come spring. If your model to Continued on page 89 some kind, and then store it where there aren’t large temperature changes or high humidity. This means avoiding the temptation to just chuck it out in the un­ heated garage or up in the attic. Models seem to be easier to prepare for storage, especially if you take the time to clean them after each flying session. All that is really necessary is a better-than-usual cleaning job. For instance, with the motor out, the motor mount area can be cleaned. If using wooden motor bearers, they can be sprayed with K2R Spot Remover, which just sucks all the old oil right out of them, although a couple of applications may be needed to get it all. Tanks should be cleaned, preferably removed from the model so vent and feed lines can be checked thoroughly. Hard (metal) tanks need a complete cleaning; flushing with alcohol works fine. When clean, be sure to get the interior of the tank well-oiled so it won’t rust over the months. All replaceable fuel lines should be main­ tained, for those who are on a very tight budget this means just looking closely, Rich Lopez, Steve Hills, and Spider Man Myles Lawrence (I to r), after Rich won Fast Combat. for all others it means simply replacing If Rich does well, Steve lets him roll up lines (and Myles gets to hold a wing tip). NOVEMBER 1982 59 M B's Free Flight columnist, Tom Hutchinson, with his Maverick Tom's assistant columnist and ex-MB columnist. Bob Stalick, holding 1 /2 A design. Tom's Drag master A/2 design. NACA labs and is promoted as a good power model airfoil. It uses the same camber line as the more popular 4409 FREE FLIGHT foil, but moves the high point to the 30% area. The result of this is that the section By BOB STALICK should be less sensitive to balance point shift or size of stab. The bad news is that • What is this? A new writer for Model not seen much anymore, but at the time it is a somewhat slower airfoil. As it is not Builder Free Flight? Well, if you’ve been it was a feature on several successful undercambered, but has a "dropped" reading this column for a long time, you designs. The designer was an up-and- leading edge, it should be a decent may remember the name of Bob Stalick coming free flighter who competed in choice for large AMA gas models. It is . .. that’s me. I used to write the regular the FAI Team Selection program until he probably too thick for modern FAI free flight column back in the "old met with an untimely fate. If you know power models and 1/2A gas models. days.” Here I am again, this time pinch- the design, drop Bill Northrop a line Give it a try on your next big gas design hitting for your regular columnist, Tom with the correct answer, and he will . . . you might like it. Hutchinson. Tom has asked me to fill in reward you with a good goodie .. . pro­ A Flight of Airfoils for him while he overcomes his current vided you are the first in line. Since I began writing this column in bout with the big “ C” . Hopefully, for Model of the Month: B-Quell AMA Gas. 1974, I presented a new airfoil each him and for you, this will take just a short One of the nice benefits of being a month until Tom took over the writing time. In the meantime, I’ll try to carry on columnist is that you can promote your job. He continued the practice. Some of with the quality of the column as you own model designs. This design is the B the sections have been used successfully would expect from Tom. Wish me luck! version of the highly successful C-Quell by modelers around the world . . . many Mystery Model design that I have been flying for the of the sections presented on these pages For you old time readers of the NFFS past 8 years. The C-Quell is a Model have come from world famous (and Free Flight Digest, you should recognize Builder plan and is still available. Some successful) modelers. I havesincecopied this one from a 1966 issue. It’s a Wake­ notes on the ship are in order: each of the DGAs printed in Model field, and it’s not by Bob White .. . even 1. The ship owes its heritage to Al Builder since 1974 and would make this though it has twin fins. The V-dihedral is Vela's Mexi-Boy for the proportions and set available to anyone who is interested, planform shape. 2. The ship owes Bill and Bob Hunter for its wing and stab construction . . . direct from Satellite City. 3. The fin location is owed to any number of British designers. All other features of the model are original. The design is the most competitive Big Gas model in the Northwest and has been for several years. For two consecutive years, it was in the flyoffs at the Annual Hawks Power Bash, winning first one year and second the next. In each case, the flyoffs went to the 5-second engine run (Cat. II). Although the stabilizer is huge by current standards, the model grooves exceptionally well in a right-right pat­ tern. The transition is smooth and the glide has to be seen to be believed. Power isthe new K&B .21, but an OS Max 25 would also be a good choice. It may look difficult to build because of the elliptical type surfaces, but don't be fooled . . . a long sanding block does Ron McBurnett preps his 1/2A Megabucks at wonders in shaping ribs... Also at Harts Lake Prairie, Gene Jensen waits Harts Lake Prairie, Washington. Model is pro­ Darned Good Airfoils: NACA 4309. w ith Pirelli ready to snap in Wakefield ship. totype for his FAI Power model. This month’s DGA comes from the Is th a t a piggybacker also w aiting ? 60 MODEL BUILDER for the cost of duplication and postage . . . provided there is enough interest. As we are talking about 100 plus airfoils, the booklet is 15 pages long. Two dollars a booklet would cover all costs. If you have some interest, drop me a line, and if I get enough inquiries. I’ll produce a run of them. Contact Bob Stalick, 5066 N.W. Picadilly Circle, Albany, OR 97321. The Latest Flap from the FAI Free Flight Program Once upon a time, the National Free Flight Society and the Academy of Model Aeronautics noticed that the FAI F/F program was in need of some over­ haul. These groups appointed FAI types . . . one per AMA district to the FAI F/F Committee. This committee met in Detroit to iron out the format for the program. Ideas flew back and forth . . . and finally, a new program was adopted . . . presented to the membership of the FAI fraternity and passed into immor­ tality. Over the years, the program has been modified and refined, but the basic concept has remained intact and valid. As an integral part of that program was the concept that the finals site would be rotated every two years from East to Central to West . . . provided a suitable site could be located. In fact, the committee even stipulated what was East, Central, and West. From the Atlantic Ocean to the Mississippi was East, from the Mississippi to the Rockies was Central, and the Rockies to the Paci­ fic was the West. A site selection committee was appointed to look into the suitability of the proposed sites. One result was Hastings, Minnesota. From nearly every contestant’s point of view, this site was a debacle. In fact, the contest was not completed due to the poor weather and site conditions. A second contest had to be held later to finish up the team. Consequently, a set of guidelines were drawn up entitled “ Site Selection Criteria for FAI F.F. Finals.” These criteria have been used ever since to determine the suitability of preferred locations. Sites are rated on everything from weather history to site size and terrain, from availability of support staff to contest and event directors, and from field amenities and proximity to motels and highways. It is probably the most complete document available to guarantee a good location for an impor­ tant even such as team selection. Now, here’s the rub. A small group of AMA vice presidents wants to require "Big airplane equals big positive feelings.

DARNED GOOD AIRFOIL - NACA-4309

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

UPPER 0 2 2.8 4.1 5 5.9 7.1 7.9 8.5 8.3 7.6 6.7 5.5 3.9 2.2 1.2 0

LOWER 0 -0.9 -1.2 -1 .4 -1.4 -1.3 -1 •0.8 -0.5 -0.4 -0.3 -0.1 0 0 0 0 0

NOVEMBER 1982 61 that the program rotate its final sites. The purpose is noble. . . to insure equality of opportunity and interest in the AMA FAI F/F program regardless of geography. But, if the sites aren't there or aren’t MYLAR STRIPS proposed, no amount of requiring will APPROX. 1-1/2"x 1/2" automatically cause it to happen. The followingsuggestion (orproposal) to this issue is offered as a solution. Give priority to a site (other than West) if it meets the criteria, if it is located in the East or Central part of the U.S. If we use the original format, the 1982 finals MYLAR STRIP HOT-STUFFED should have been held in the East. That means that the 1984 finals should be held INTO SLIT 10% BACK in the Central region. I would suggest FROM L.E. that we promote fliers in the Central region to hunt for and secure sites for 1984. If one of two are located, then these folks should propose their sites to the committee and the fliers. The vote I 10% I 10% I OF CHORD should be between or among those Central sites that are proposed. If none PHIL HAINER'S HAND LAUNCH GLIDER TURBULATOR FLAP. are suitable or proposed, then an alter­ nate site, e.g.: Taft, should be made available. A M A ’s greatest Free Flight Contest month with more of the latest on the The result of this proposal or sugges­ Director . .. Pete Sotich. free flight front. In the meantime, find a tion is that we have prioritized the I wonder whatever happened to the thermal and fly. · region as the choice for the finals. Only best design innovation on power if no suitable offers are forthcoming, models . . . Very High Thrust Lines NFFS MEMBERSHIP AND RENEWAL APPLICATION M ail to: should the finals be held in another (VHTL). Make checks payable NFFS region. In order to determine suitability, I wonder whatever happened to Jetex. to the 707 2nd Street National Free Flight Society the committee should review the site I wonder whatever happened to Davis. CA 95616 selection criteria for each proposed Pneumatic timers. Subscription rates include annual fee of ISO for membership location. in the National Free Flight Society The balance of the fee m Did you know that the National Free each category is for Subscription to FREE FLIGHT, the NFFS We don’t need the greatest site for a Flight Society began 17 years ago? Digest. Subscriptions are not available without membership finals . . . but we do need an excellent Did you know that Frank Zaic pub­ MEMBERSHIP FEES AND SUBSCRIPTION RATES II and 2 y* I site. Selecting the best team is the lished his last yearbook 17 years ago? Age I 9 l i over l y r *1» 00 ft SO membership fee phn t t « SO subscription! and residents of primary goal, but maintaining the pro­ Did you know that old timer events fortun countries 3 ft 131 00 (St 00 membership fee plus R t 00 subscription! gram’s participation has to rank right began 21 years ago . . . and at the time, t yt 97 ΛΟ It 50 membership fee plus V 00 subscription} behind it. the decision was made to limit old timers 3 yt 911.90 I$1 00 membership fee plus »1? W subscription) Hand Launch Glider Turbulator Flaps to designs that were at least 20 years A sketch in this issue of Model Builder old!? Ages are as of July 1 of the current year. Please circle Free Flight shows a new hand launch Did you know that Marilyn Monroe applicable fees. glider development by Phil Hainer, Sr., would be 55 years old this year? New member Renewal Address change Q of Seattle. According to Tom Cashman, Did you know that the first NFFS of the Bat Sheet, the glider was launched Symposium occurred 14 years ago? straight up, as near to vertical as possible. Do you remember when a small car Name AM A #

As the airspeed dropped off, the glider was a Chevrolet or Ford? Address would show a bunt type transition with Do you remember when the U.S. Navy just a bit of a stall at times. Best of all, sponsored the AMA Nationals? a p reports Tom, it seemed non-critical as to Either Tom or I will be back next launch angle, bank, etc. Several people took turns throwing the ship, and although several bad transitions occurred, most of the time, it would roll out into the glide without a significant altitude loss. Phil theorized that the flaps are held flush during the high speed launch, but spring out to provide a lot of turbulation and kill the stall that would normally occur. This seems to bean idea that’s worth more experimentation. Phil tried to get the angle of the mylar strip to be nominally tangent to the arc of the airfoil section and 10% behind the leading edge. Hmmm, I wonder if the idea would work on indoor gliders? Some Points to Ponder Every once in awhile, I begin to wax nostalgic about the past. When I do, I always amaze myself. Here are some of the latest: I wonder whatever happened to the greatest free flight contests ever held at Bong Field . . . The Gatherings of Eagles. I wonder whatever happened to the NOVEMBER 1982 63 This plan, printed on the front and back of a single sheet, was printed in blueprint style . . . white lines on blue back­ was included with an Ace Whitman kit, produced by the ground, while the reverse side with instructions and sketches Whitman Publishing Company, Racine, Wisconsin, beginn­ was in black on white. Incidentally, there was no printwood. ing in 1938. Span is 28", based on 7/8" = 1 foot scale. The parts layouts were to be cut out and “ pasted” to blank Harold Johnson, Minniapolis, MN, supplied the "like balsa sheets supplied with the kit. new” plan from his own Ace Whitman kit. Original plan

64 SEE FULL SIZE PLANS AVAILABLE - SEE PAGE 96 MODEL BUILDER

mend that you buy it from one of the listed vendors. You should consider making Suits II, III, and IV (shown on Drawing 3). Start with Suit II. The idea is that when a flat sail is under wind PIPER VAGABOND pressure, the highest point of the airfoil chamber is at the 50% chord distance. Remember that a sail is a vertical, Wingspan: 33" flexible sailplane wing stuck on a stick. We know that the position of the airfoil high point should be around 25 or 30%. That's what a panelled sail can accom­ plish; the extra material will create the proper airfoil high point at the proper location. This article will not address how to design sails, find the CE’s, etc., but for now, like the man says, “ Trust me.” Drawing 3 will show you where to place the sails for the optimum trim. Sails have roaches, which is the mate­ rial outside of a line from the top of the sail to the lowest point farthest aft of the sail. This material is not counted in the AMYA sail area formula for 36-600’s, so you can get a lot of "free” sail area in big roach sails. To keep this area from flopping around, battens are slipped into batten pockets. I hate to be so elementary, but this article is to help the For Rubber Power or Gas Engines beginner start sailing at a level that it took me a lot of testing time to reach. Now for the "how -to" part; I will Free Flight, R/C or C/L address these changes in each major component. For .049-.051 Engines HULL There are options available to you, and the whole idea is to optimize for Kit K-7 24.95 your weather conditions. It is said that wind comes in three speeds: light, medium, and heavy; and you can design ignorance wonderful?) a boat for any two, but not all three. So PEA POD...... Contued from page 19 The best spars are light and reasonably pick the ideas that look like they apply to stiff (the price is a little stiff, also). Spars your area. much lift, but fat, symmetrical stunt and are made out of aluminum, boron, The hull consists of a deck, two sides, combat wings will develop lift at very graphite fibers, fiberglass, etc. This mast and a transom. The outlines and con­ high angles of attack without stalling. will be made of wood from the simplest struction should be as on the original, Just remember: the keel is supposed to source because with the weight of the but the reinforcing blocks should be develop lift, and water acts like real thick hull, it would not be worth the money to epoxied as shown on Drawing 1. Drill air. get a super-light mast. The boom and jib holes for the nails that hold down the The bulb performs a righting motion club are airplane push rods of fiberglass. spruce strips around the outside of the on the hull when the wind forces the As for the rigging, just do it like I have in deck during assembly, and you will be sails over. Most of the racing 36-600 this article and you will have rigging that less likely to split the strips. I assembled bulbs are long, low-frontal-area, stream­ is easily adjustable, reliable, field- my hull with Flobby-Poxy Formula 2 (45- lined bullets, so that must be the best serviceable, strong, reasonably low minute work time) and used a heat gun shape. BUT, in my ignorance, I do not wind-resistant, non-stretching and, to thin the epoxy so it would penetrate have to accept that. I took a very sim­ really important, cheap. better. You will notice a scroll-like piece plistic approach that I think improved Winches. . . we could purchase a top­ of plywood on the bow of my boat. That the Pea Pod. (Please, don’t all you racing line winch and it could be used on a boat is to cover the lacing holes I tore out skippers start writing in and destroying twice the size of the Pea Pod .. . which is while I was pressing the sides down to our myths.) Since I wanted lateral area kind of an over-kill. Sanwa makes a servo the deck during assembly. Perhaps this and lift, I made the bulb like a constant winch which is used successfully on reflects on my building ability rather chord, short-section wing. I know that many Tower Tradewinds; Futaba FP-S25 than on the design. some boats (Tower Tradewinds and (ref: FLYING MODELS MAGAZINE, Symmetry is the thing to achieve when Dumas Huson, among others) have the August 1981) and World Engines S-16 building the hull. Leave cutting the keel and weight in a one-piece wing, but (ref: FMM, October 1981, and MODEL hatch opening until after the deck and we want the weight way down there so AVIATION MAGAZINE, May 1982) have sides are attached, so the deck w ill we do not need so much of it. So now my often been used. I made mine from a remain as flat and rigid as possible bulb contributes to the below-surface $1.25 toy motor, and it cost $3.70, in­ during the earlier assembly steps. Cut lift and the lateral area, and does not cluding the three switches and two the hatch before the transom goes in. I have much more frontal area than an diodes. tried to utilize the top of a sandwich equivalent-weight bullet. I can add a Now for the sails; there are two kinds, container for a hatch, but it was not wafer of lead to the bulb to change the flats and panelled. Flats are (ready for watertight and could not be sealed with weight when I change sail configura­ this?) flat when you lay them on a flat tape, so I made a ply hatch cover that tions (as the wind speeds dictate). See, I surface, and panelled sails have bag could be sealed. By the time you read have turned another disadvantage into a down the center. Flats are easy to make, this, I will have my hatch cut to the size tuneable parameter to optimize the Pea panels are not. Should you decide that and shape shown on the drawings. Few Pod for the prevailing conditions. (Isn’t you want a panelled sail, I would recom­ hatches are truly watertight, so plan to

66 MODEL BUILDER lite AU Mm Qéfeh NE5045 1C Decoder Shielded double tuned with flutter circuit, front end coils- noise filter and voltage regulator Shielded RF Choke~

Seimans S042P 1C double balanced m ixer Test and tune point extern- Five-Channel receiver shown — one to seven -ally accessible channel operation possible. Dean'* connector version available with either End-Block or Pig­ tail-type connectors. 12G70— Silver 7 Receiver, Kit $38.95 These receivers are also available assembled with or without Years of development have produced one of the finest state-of- connectors. Connector and Switch Harness packages are avail­ the art receivers ever made. Flight tests all over the country have able for the kit. proven this receiver will fly where others fail. Solid, glitch free per­ P.S. We have lowered our servo prices! Write or call for details. formance in the air when the plane is at any attitude is the proof of a receiver's abilities and here’s where the Silver Seven receiver excells. SPECIFICATIONS •Weight - 1.4 oz., ‘ Diminsions - 3/4" x 1-11/32" x 2-1/4" Those that are familiar with the Silver Seven transmitter's quality •Power Supply - 3.6 — 6V, ’ Current Drain - 10 ma nominal and performance know what to expect of this new receiver. Of •Sensitivity - Less than 2 microvolts, ’ Image Rejection - 6 db | course, like our Digital Commander, the Silver Seven receiver is com- •Two Signal Intermodulation rejection - 46db, patable with any modern R/C transmitter from one to seven channels •Power Supply rejection - Greater than 40 db and will operate any positive pulse servos. Easily tuned with a volt­ meter

NOTE: Just to make sure there Is no mis-understandlng, this receiver is NOT a "narrow band" unit. It Is useable with the new frequencies we w ill be getting soon but w ill not be useable after the eight year "phase- in" period is up. Watch out for false clalmsl BOX 511D,HIGGINSVILLE, MO 64037/816-584-7121

use tape for sealing. A larger hatch epoxy cures, remove the inside tube and rigged. Hardware choice is up to you, would have permitted me to do much the 3/8-inch piece. Do not bevel the but you will have no difficulty doing neater work below deck. For a hatch tube bottom to match the hull shape. what I did. cover, use transparent plastic or built-up KEEL Boom and jib club: I used fiberglass plywood. This boat is going to be sailing Here there is a choice. The original is push rods. Make sure they are light, stiff, in rough weather. Do not worry about a fine and is what I have, but if I were and can be easily drilled. The method I lot of taping, because a magnetic switch building another Pea Pod, I would use used to secure the sails to the boom and is used to turn the radio off/on and all the one shown in Drawing 1. club is a good idea (Drawing 2) but, in pond-side sail adjustments are made RUDDER reality, the method shown in the original from above deck. Once you set it up, Build as an original except push a drawings may be as good and is much there may be weeks when you will not piece of 1/8-inch diameter bronze easier. The original boom vang is also untape the hatch cover until the end of welding rod five inches long into the quite adequate. Make sure that it is the sailing day. After the hull is off the rudder post tube. This is strongly recom­ possible to switch sails at the pond and building board or work bench, fill the mended. If you solder this rod in, put move the jib fore and aft on the club, nail holes with pieces of toothpicks. solder in each end of the tube before because it is desirable to control the Install the rudder log blocks (Drawing epoxying the shaft to the rudder. (If you ratio of the jib area fore and aft of the 1) before adding the varnish to the use “ Hotstuff" or equivalent, de-oil the club swivel. inside of the hull. When drilling for the inside of the tube and the outside of the BULB rudder shaft log, turn hull deck-down. rod.) De-oil the outside of the brass and This is a major change to the original This hole should be as close to 90° to the rough it up before epoxying it in the “ hull package.” Build the bulb as per deck (when viewed from rear and side) rudder. Shape the rudder into an airfoil. Drawing 1 and the photos. The bulb as possible. Drill through the hull bot­ Set up the steering for about two inches can be made in two or three pieces. The tom, rudder log blocks, and deck in one total movement when measured from bulb without the streamlined bottom operation. Cut three pieces of 5/32-inch the rudder trailing edge. cap weighs 3 lbs. 1 oz. With the cap, it ID brass tubing 1/2, 3/8, and 1-7/16 SPARS weighs 4 lbs. 13 ozs., and with the wafer inches long. Rough up the outside of the Mast: Use the same materials as on and cap, 5 lbs. 8 ozs. These are not tubing so the epoxy will grip better. Slip the original. Really shop for the straight- absolutes, as long as the bulb weight can a 5-1/8 inch piece of 5/32-inch OD brass est 7/16-inch hardwood dowels avail­ be adjusted from about 3 to 5-1/2 tubing inside the three pieces with the able. I must have handled at least a pounds. These weights are used in 3/8-inch length in the middle (this hundred dowels at six stores before I got combination with different sail patterns. center piece is to help assure alignment the two I wanted. Build the mast as Just remember that as the wind tries to and spacing of the shaft log). Push this shown in Drawing 2. What mathematics blow the sails over, the bulb will resist. “ assembly” through the hole, epoxying did I use to determine mast length? I But also remember that as you add the outer tubes to the rudder log blocks. measured the maximum distance from weight the waterline gets a little longer The outside end of the 1/2-inch piece the inside rear-view mirror to the back, and the wetted area increases. should be about 1/8-inch below the inside lip of my Honda Civic hatchback. I put the bulb work off as long as i upper deck surface. Confirm that the It does seem to be the optimum length could because it is always such a drag to inside piece rotates smoothly. After the . . . really. I transport my boat fully convert HER kitchen into a foundry. (Go NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 67 sail patterns have a more rearward CE than the original sail. However, the CANNON F I R S T ooi 1 9 8 2 = original sails can still be used with these R/C SYSTEM S new positions. [ 1 There is a way to check proper sail WORLD’S SUPER-MICRO! position. When sailing toward the wind (about 45° off) and a gust starts to heel SMALLEST SERVO, Rx & COMPLETE R/C SYSTEM the boat, you can readily see if the SUPER-MICRO Servo, .47 oz., 29/64 x 31/32 "lead” is correct. When the boat is X 1-3/32", 15oz.-in. thrust. Works with most blown over, does it quickly try to come oil positive pulse decoders. MICRO Rx (4 CH. about and head up into the wind? If it max.), 19/32 X 7/8 X l -9/16", weight .54oz. does, the CE should be moved forward (2 CH .) (5 CH . uses larger MINI Rx). Flite by relocating the mast and/or deck/ packs compatible with Tx of most other makes. swivel connector forward. When you move the mast, move the shrouds ac­ ITEM SYSTEMS FLITE PACKS cordingly. 2 CH. $ 2 3 4 .9 5 $169.95 (2.9oz.) If the rudder cannot turn the boat into the wind, the CE is too far forward. 3 CH. 292 .95 2 0 7.50 (3.39 oz.) Remember, however, that when the 4 CH. 349.95 2 4 4 .9 5 (3.88oz.) boat is heeled way over, the rudder is 5 CH. 359.95 2 4 7 .95 (4.16 oz.) part rudder and part elevator, so some steerage loss is to be expected. You may *SERVO $47.50 MICRO RX $89.95(4 CH.) have to let out on the sheets and dump *Micro or Dean's plug; others S2.50 extra. some air, which will allow the boat to come back toward vertical, where your SHIPPING: Systems - S6.50; Flite Packs - S4.50; Servos or rudder will be more effective. Rx - S3.00. 20% deposit required on C .O .D. orders. Calif, A backstay has been added and re­ residents add sales tax. Brochure - .50U.S., SI .50 Foreign . quires a mounting plate (Drawing 2). 13400*26 Solicoy Sire.! North Hollywood, Calif. 9t60S Phon. (213) 744.1486 The travelers shown on the same draw­ ing are simpler than those I made, but will work every bit as well. The purpose of the traveler is to exert downward pressure on the boom, decreasing the amount of twist in the sail. The travelers are adjustable. Start with the traveler block (ring) stops (hubs) in the center as “ Matched Performance System” if they were tied off at the deck. As wind for TOP PERFORMANCE K4B ENGINES increases, start opening the area for the '6 A.roiane · - Ma-re block to slide. It is an easy addition to the WARDCRAFT OFFSHORE *48 Fuels *4B GlOA Plugs boat and another opportunity to learn ' Θ f"CS 4 ;no BES N -SB 5,=E= »:»■ '-ΛΝΕ» test braided nylon line and a bowsie for P.O. Box 2579 Lynnwood, WA 98036 *48 S^PEB POXv PF MEP *48 SuBE° ooxv pa.n* *4B V XAG C.PS adjustment. The loops on the leader are Frank Ward Dealer Inquiries Invited. secured by crimped sleeves. The sheets Days: (206) 543-6534 KAB MANUFACTURING 12152 Woodruff Avenue and down-hauls are also 85-pound Eves: (206) 775-3969 mt*0^ Downey. California 90241 nylon with medium size airplane control line clips. Do not use fishing clips or outside to pour the lead.) Get plumber’s smear the outside surface (as viewed swivels, as they foul and pull open. No lead in 5-pound ingots from a plumbing when assembled) with quick-set epoxy. one likes to see his mast go down out in supply shop. It will seem that the big Use a heat gun to help the epoxy flow. the middle of the pond. chunk will never start melting but it will, When cured, trim the edges as necessary The jenny strut (Drawing 2) is for eventually. Do not try to melt it in an and fit bulb to keel; securing with one stiffening and trimming the mast. There aluminum can. Get as much lead-to- #10, 1-1/4 inch long flat-head wood are times when you want the mast can-bottom contact as you can (file the screw. bowed forward or backward, but never oxidation from the bottom of the ingot Epoxy bulb to keel, fill cracks with to the side. Smooth inside the jenny strut before you start heating it and you will Plastic Wood, Bondo, or other filler arm notches and just barely grip the stay save many kilowatts), turn on the stove material that is not water soluble. Cover so it will not pop out by itself, but the vent fan, and disconnect the smoke with one more thin coat of epoxy, final line can be removed to adjust the detectors. Make the molds out of tin can sand, and decide if it is smooth enough. tension. If you must often unrig your stock like the photos show. Use the You could put glass cloth over it, but it is boat, you might decide to use quick- dimension of the template in Drawing 1. not necessary structurally. Put a strip of disconnect turnbuckles and solid stain­ Make the three molds 9/16, 7/32, and tape or Trimkote over the bulb/wafer/ less steel fishing leader for shrouds and 1-1/4 inches high and fill them to the cap seams, and fill the bottom counter­ stays. top, so they will be the correct weights sunk areas with oil-base modeling clay. I stained my mast mahogany to match when shaped. Use plenty of that old You can put two disks of Trimkote over the hull and put polyurethane on it black wheel-bearing grease inside the the countersunk holes if you like; I have before I put the jackline on. Leaving mold. An old rough file will clean up the done both. Permanently fill the bulb-to- 1/32 inch between the mast and the pieces quickly. keel screw recess with putty. Install keel bottom of the screw heads. The screws Make the bulb, wafer, and cap fit as in hull, 90° to deck, with rudder and keel are available at most good hardware flush as possible. Drill and countersink in line as viewed from the stern. stores, but they are not sold in the little for two flat-head wood screws, then DECK FIXTURES AND RIGGING plastic boxes . . . you have to ask for screw cap and wafer to bulb bottom; Thebrass work is installed as shown on them. The solid .020 diameter stainless now shape as one piece. Sand, separate, Drawing 1. This puts all brass forward of steel jackline is available at sporting clean with acetone, and immediately the original position, because the large goods stores specializing in fishing

68 MODEL BUILDER SETTING STANDARD Leading the way for years with innovative and trendsetting designs American R/C Helicopters has set the Standard of Excellence with the intro­ duction of the Mantis. Very popular, this .40 powered R/C helicopter offers a whole lot more than it’s modest price would indicate. Precision craftsmanship and high quality provides performance that can’t be beat! In-house production puts us a step ahead. Our quality is uncompromised and our service unparalled. As manufacturers we have an extensive inventory, so you won’t find yourself waiting for that overseas parts shipment. We pride ourself in our courteous, reliable service. Compare and discover for yourself the exceptional value that is built-in each and every helicopter we sell! DEALER and DISTRIBUTOR INQUIRIES INVITED . . . KIT SPECIFICATIONS: SUPERMANTIS ★ Rotor Diameter - 41 Vi” COLLECTIVE PITCH Collective Pitch ★ Tail Rotor Diameter - 9” MANTIS MODIFICATION with functional ★ Length (nose to tail) - 43" mechanical tail Fixed Pitch Converts Mantis ★ Height - 13 Vi” $189-00 to SuperMantis rotor compensation $85-00 $225.00 ★ Weight - 6 lbs. Prices subject to change without notice.

★ A m e r i c a n For Further Information Call or Write: (714) 744-7533 ^ R /C Helicopters, Inc. 635-11 North Twin Oaks Valley Road ★ San Marcos. CA 92069 equipment. Obviously, the screw head In R/C yachting, the effects of interfer­ My winch is sufficiently powerful, and slots are to be aligned with the mast, ence from other transmitters, vibration, very fast while running on 2.4 volt 1100 then given a drop of “ silvery” solder flux and crash damage is the least of any MAH NiCds. The winch battery lasts for (no one could afford real silver solder modeling form (excluding non-powered about four hours of sailing. The motor, these days. . . I used Stay Brite). Solder indoor lighter-than-air R/C). gears, and batteries were all bought the wire in the slots with the wire under There are two potential problems, from electronic surplus mail-order a little tension to keep it tight and however: corrosion from the high houses. I said SURPLUS . . . know the straight. A 30-watt iron works fine. Be humidity, and electrical interference risks when you buy surplus batteries, sure to wash the flux off everything. from the winch motor and gears. The etc. The long crane is necessary for the best way to take care of the moisture is to Using wire on the sail control unit to backstay to clear the large roach sails. If put your R/C equipment on a remov­ contact the micro-limit switches is a you know that you will not use the large able board which will be in the boat only good idea because by bending the wires roach sail configuration, make the short when sailing; or you could put the you can adjust the extreme ends of crane. You will see in the photos that my receiver in a plastic bag with desiccant travel of the arm. The diodes across the crane is really an extension. I have not material, but do not seal the batteries, as switches permit reverse current around removed it since I put it on the first time. they have to vent when recharging. You the open limit switch. The switch that You will also see where I have extended MUST get a sponge about 1x1x4 inches, controls the winch direction can be the original mast to the height recom­ cut lots of slots in it to increase the sur­ made in several ways. I suggest you take mended in this article. face area, and poke it into the lowest a small toggle switch (DPDT) and open it Over the rudder post hole, I epoxied a part of the hull. Then when you get to remove the spring or whatever causes block and mounted cleats to secure the water in the hull (and you will) it will not it to snap from one position to another. ends of the sheets. The deck eyelets for slosh around and get all over everything. Make sure that you still have good the antenna and fixed sheets are small During a regatta, if it is VERY windy, I contact pressure when you reassemble servo eyelets, but the “ feed throughs” wring out my sponge between heats. I it. You can attach the winch control for the running sheets need to be larger do not mind the repeated taping of the servo push rod to the switch toggle any and quite smooth. The freer the sheets hatch cover because "this is racing’ an’ number of ways. I modified a slide from the inside eyescrew to the traveler, racin’ is sirus biznis." When sport sailing, switch to accomplish the same thing. the sooner that elusive little zephyr will before I leave the pond, I wring out the The general difference is the toggle will waft the sails into position, get the drive sponge and let it dry. I always leave the have a “ wide” center OFF and the slide system rigid, and the hull moving. I like hatch cover off while the boat is stored. switch will have a "narrow” center OFF. to think that I would have eventually If you use a commercial winch (or For the rigging shown, the arm is 5 evolved the sheeting system I have, but servo), the electrical noise will not be a inches from the arm pivot to the main the truth of the matter is that it is problem. If you build your own, as I did, sheet eyelet and 5-3/8 inches to the jib identical to that shown in the July 1978 it may be. M oving the R/C w iring sheet eyelet. An arm moving through a issue of Model Builder; another one of harness away from the winch and winch 140° arc will do fine. Swing rates from 4 the excellent Rod Carr articles. wiring will help take care of the problem. to 10 seconds will be OK. Mine is 2 RADIO CONTROL The circuit shows arc suppression for the seconds! Any two-channel radio gear will work. motor brushes. The magnetic switch is not my idea,

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 You need do this on only one side of the ASTRO CHALLENGER COBALT MOTORS fabric, as it will soak through. NOTE: Do not do this with the sail lying on some­ SUPER POWER FOR WORLD CLASS COMPETITION thing; I thumbtack mine to an open

We built our first cobalt motorm 1975 for out SOLAR-powered doorway. I tried using dope to seal the unmanned airplane SUNRISE. The SUNRISE motor weighed 16 edges, but it shrinks the material too ounces and produced 3/4 HP Last year we built the SOLAR much. After the glue cures, I cut on the PROPULSION SYSTEM FOR THE DUPONT SOLAR CHAL­ pencil line with sharp scissors. The LENGER that made its historic flight from Pointoise, France, to Mansion. England, on July 7 1981 The SOLAR CHALLENGER dacron I cut with a hot knife which I COBALT MOTOR was only three inches m diameter but made by putting a little blade of sharp­ delivered almost 3 HP" By using this advanced technology ened brass shim stock on my 45-watt we bring you our new ASTRO CHALLENGER COBALT soldering pencil. It hastoheatlOminutes MOTORS, super-performance motors for the serious competitor, for the modeler who demands the best and before I use it and then I have to be very simply won't settle for second best The heart of these careful while cutting, but it is FAST and motors is the new. high-energy, rare-earth COBALT gives a good edge. magnets They supply much higher magnetic flux and are not damaged by overloadi ng To efficiently utilize this Make VERY SURE that you have drawn magnetic potential we have incorporated (1) a high-grade Challenger 05 .... S75.00 the finished luff edge (front of sail) with silicon steel armature lamination. (2) a high-performance a straight edge. You must crease the commutator capable of running at 35.000 RPM and 350° F . and Challenger 15. . . $100.00 material on that line. Fortunately, the (3) a now silver graphite cartridge brush that can safely Challenger 25 . . . $125.00 commutate 25 amperes The net result is a really super-power material holds this crease well. Unfortu­ Challenger 40 . . . $150.00 motor that is ready for world class competition THE NEW nately, it will also hold a crease where ASTRO CHALLENGER COBALT MOTORS — NOTHING ELSE Motors made to order.Please COMESCLOSEÖ you do not want one. When sewing, use allow 30 days for delivery. a #11 ball point needle; straight stitches Send stamped self addressed LARRY JOLLY SETS ELECTRIC SPEED envelope for specifications to: of 8 to the inch; and polyester thread on .\\ RECORD OF 92.85 MPH (2-WAY AVERAGE) a light tension. When using zig-zag CV WITH ASTRO COBALT 05 AND flC T D ffl C l If* LIT ΙΠ Ρ stitches, use a stitch about 1/4-inch -FASTEDDY".. s u b j e c t t o H b I If U r u l b Η I III L wide. Sew on batten pockets so they Y ^ FAI CONFIRMATION. 13311 BEACH AVENUE VENICE, CA 90291 really are pockets, with the opening toward the luff. Put a drop of Hotstuff on and it is a good one. The switch is a Radio lower aspect ratio. I do not think that the end of stitching line so the wind won’t Shack 49-512 NC. I removed the glass boat would have been any faster with whip the thread loose. Use a soldering tube with the reed switch from the Suit I and no bulb wafer. If you are going pencil to burn the holes for the corner plastic housing, put connectors on both to build just one suit, unless you live in grommets. The battens for Suits I and II ends (this redundancy is to your advan­ dead air, build Suit II, or buy a panelled are plastic shirt collar stays. For Suits III tage) and lightly epoxied the glass tube sail to Suit Il’s dimensions. and IV, I used 3/8-inch strips from the to the underside of the deck in a place I have made sails from 1-1/2 oz. plastic "FOR RENT" type signs found in that I could easily locate from above ripstop nylon, 3.0, 2.8, and 2.5 oz. hardware stores. This material is .015 deck. To the magnet that comes with the dacron, and have tested a 2.2 oz. pan­ inches thick. Use a single-edge razor switch, I added a bright streamer so I elled Suit II sail made for me by Chuck blade to scrape the paint off the signs. . . would not be likély to launch with the Black. The2.2oz (or the 1.8oz.) dacron is I mean battens. More than one strip will radio off — a sort of "remove before generally the preferred material. I do be needed for the very long battens for float" tag. You can hear the switch click not recommend the new mylar material added stiffness. even with the hatch cover taped on. for this boat. Nylon is harder to work So now . . . which material? What SAILS with than dacron and is not as airtight as I weight? What kind of sail? We need to At last! All the other work does not would prefer, but it is cheaper. I test all understand that sails develop no thrust matter unless we understand from my patterns in ripstop before I cut up my on the hull unless the jib and main whence comes our power. If you have good dacron for what might turn out to sheets are tight. Keeping them tight is made the original sails, you can cut off be a dog of a sail. . . like my big roached the trick. Therefore, anytime this tension the sleeve luff, then hem and attach the panelled main (not shown!). is not there is “ drift” time. The panelled hooks. The original boom is too long to I lay out the sail pattern full-size on sails, with more material (or bag) have use with the backstay, but you can re­ paper, showing the outline and batten more drag when the tension is removed. move the backstay and replace the pockets, lay sail material over it (you can When this drag is coupled to a very light boom when you want to use those sails. see through the material) and with a hull, the skipper must be very careful or The original sail pattern I am showing as pencil draw on the material. If it is nylon, he will lose steerage. It takes time (some­ Suit 1.1 have sailed in "scale” gales with I run a bead of Hotstuff-type glue over times a lot of time) to get the drive Suit II with the bulb wafer in place, and I the outline, with the glue spreading 1/8- system rigid again. Then why use pan­ do not think that I needed the Suit I’s inch on either side of the pencil line. elled sails? Because they are faster. They do have more drag and less acceleration than flat sails, but when they are rigid, they develop more thrust. They are HP GOLD CUP noticeably faster at “ terminal velocity.” Our group races on a course that is 150 feet to aside. The shorter the course, the ENGINES better flats would be. The more flexible • ULTIMATE IN RELIABLE OPERATION • CHROMED LINERS the material, the more luffing during a • DUAL BALL BEARINGS tack change, and the more drag; but the • HEAVY DUTY CRANKSHAFT lighter material would permit better • THERMEX TREATED CRANKCASE control over the shape of the sail. There • PARTS AVAILABLE are no easy answers, but that is what

AVAILABLE AT YOUR FAVORITE DEALER makes it so much fun. Try to learn how to optimize your equipment for the wind MIDWEST MODEL and the course. SUPPLY CO. CONCLUSION box sint no«Eoviui.iu-tout tn-m-nss This is not a super-light, efficient hull “Serving dealers over 40 years” using mylar sails, but there are many times when you will enjoy the weight of

70 MODEL BUILDER ANOTHER MODELER-DESIGNED ACCESSORY FROM. . . X \ < = MODEL ENGINE HEAT SHRINK WING SADDLE FUEL LINE TUBING FOAM TAPE (4 ft.) (1/16” dia.)

Special formulated high grade Ideal sleeving for plugs and con­ Pressure sensitive adhesive on one black neoprene tubing for ail glow, nectors. Shrinkable by using your side (1/16" X 4’). Easy to apply. gas and oil, and diesel fuels. soldering iron or cigarette lighter. Makes neat looking wing to Part No. 200-249 $1.49 Part No. 200-250 $ .98 fuselage fit. Can also be used to seal access hatches, cowlings, etc. Part No. 200-251 $1.59

Kraft Systems · 450. W. California Ave., Vista, CA 92083 · Division of Carlisle Corporation

NOW FEATURED AT YOUR LOCAL NEIGHBORHOOD KRAFT DEALER this boat. When sailing, the inertia will THEORY August 1979 Motors, Gears, Batteries ermit steerage when lighter boats will September 1979 Jerryco, Inc. Eave lost theirs. Rounding a buoy and TRIMMING August 1974 5700 Northwest Highway tacking is much easier when you are March 1979 Chicago, IL 60646 carrying a lot of inertia. The inertia is also SAIL CONTROL May 1978 Poly Paks, Inc. an aid in choppy water. High inertia SPARS April 1977 P.O. Box 942 usually hurts in two conditions: trying to May 1977 South Lynnfield, MA 01940 · stop in a hurry (not applicable in sailboat racing) and trying to start in a hurry INFORMATION American Model Yachting Association (definitely applicable in sailboat racing). 2716 Briarwood Drive West Fuel Lines .... Since the Pea Pod is heavy (mine weighs Continued from page 20 Arlington Heights, IL 60005 9 pounds), there is logic for the flat sail: SOURCES Ceasare Rossi were both most gracious higher acceleration. With the listed Sails hosts. Again, thank you gentlemen. modifications, the Pea Pod is very nearly Amen Design Group Now, I think you’d probably rather a boat for all seasons, because you can 38 Burlington Drive peruse the accompanying photographs learn so much from it and it is a good Petaluma, CA 94952 and captions, than read through wordy boat on which to try new ideas. Black Sails descriptive paragraphs about the fac­ My Pea Pod was named before I sailed 4761 Niagara Avenue tory. When you’re finished, come back it . . . ADAGIO . . . a dance or music San Diego, CA 92107 to the text and I’ll close with some “ with much posturing but not much Winches information on the latest developments movement." I may need to rename it . . . Sail Engineering in Rossi engine technology. maybe ANIMATO . . . "with spirit." P.O. Box 8439 OK, so much for the photographs. I have a lot of things I want to try in the Richmond, VA 23226 They tell a story all by themselves. Here future on model yachts, and I am not out Dumas Products, Inc. are a few technical aspects of the latest of ideas; I am, however, out of ideas to 790 South Park Avenue .61 Rossi tuned pipe engine. To begin, it try on the Pea Pod, and this was a Pea Tucson, AZ 85719 is a smaller bore ana longer stroke Pod article. Should you have any ques­ Hardware engine than previous .61’s. However, tions, please feel free to write to me at A.J. Fisher, Inc. the important point is that it is more 236 Tennyson Cover, Picayune, MS 1002 Etowah Avenue powerful and less noisy! Specifically, it 39466. Royal Oak, Ml 48067 generates 2.6 brake horsepower on an Please join the American Model Winches and Hardware 111/2 X 9 prop at 14,000 RPM. The noise Yachting Association; they have a fine Vortex Model Engineering level is less than 80 decibels. Very journal. And .. . definitely . . . start 210 East Ortega Street impressive indeed. It will be available in racing. Model yachting is the only form Santa Barbara, CA 93101 either a side or rear exhaust version. of model racing in which tactics play PROBAR When? By the time you read this you such a predominant part. I recommend P.O. Box 639 should be able to purchase this engine the following Model Builder issues for 503 Smoketree Glen from either Rossi Sales of North America additional information. Escondido, CA 92025 (Bill’s Miniature Engines) or Condor

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 Affi/TORQUE TUBE Electronics . . . Continued from page 23 / AILERON LINKAGE mitter is operating at 90% or better of it’s normal power; or the receiver battery These strong, lightweight TORQUE TUBES are easily voltage is 4.7 volts or higher. installed in foam or built-up wings. Rom-Air Torque Tubes will When the transmitter power drops to assure the most positive, solid aileron control ever, no more between 90 and 80%, or the receiver flexing piano wire, no more trim changes caused by battery voltage drops below 4.7 volts, a yellow LED is lighted, and a 90 db alarm high or low temperatures. / g/ beeps at two times per second. ^ J The most dangerous condition, that of a transmitter power drop below 80%, or a receiver battery voltage lower than I ■ 4 , 4.35 volts, is indicated by a red LED, and an increased beeper frequency to five times per second. . j UGHTENOUGHFORTHE As seen in the accompanying photo, Λ SMALLEST R/C SHIP, STRONG the Acutech Power Indicator installs ENOUGH FOR THE MOST POWERFUL!. directly onto the antenna, with two J PATTERN SHIP! metal snap-on clips, sitting directly on Available ttolŤ»;your local dealer or order direct. top of the transmitter case. It is powered by an internal 9-volt alkaline battery, · ROM AIR — CHOICE OF CHAMPIONS reported to have a useful life of 30 hours. ΗΗΠΜ Off, as well as Tx, or Rx testing is selected © RH0M PRODUCTS MANUFACTURING C0RP. by a small slide switch on the front of the 924 65th Street, Dept. C, Brooklyn, New York 11219 unit. Now, we have all heard about the undesirability of attaching anything metallic to the antenna of our trans­ mitters, and this was one of the first tests I made of this unit. Using my MB Field Strength meter (September, 1981), I Ψ established some standard readings for a $15.98 ’ HALF A SPACER number of transmitters without the Power Indicator in place, and then, with NOSTALGIA T a / no other changes in locations or dis­ FARMAN 451 "MOSQUITO” G A S M O D E L A True GENTLEMAN S PLANE' FROM THE 50's tances, with it attached per the instruc­ Very easy building & a Delightful, gentle viston m the air' (No stmg to th e s e Mosquitos') tions. In no case was there a discernable PLANS 2 SIZES Full site, highly detailed drop in power! GENTLE GIANT (108 )to< QUADRA ...... $ 2 4 .0 0 GENTLE LADY (80') tor 40 60 4

72 MODEL BUILDER GB « M W IMAGINATION

A FOOTPRINT? — NO! IMAGINATION PUT TO GOOD USE? — YES! The imaginative 'Back Plate Design on the HB.25 gives you the choice of how to mount the engine. RADIAL or BEAM MOUNT, whichever works best! TOP PERFORMANCE ON F.A.I. FUEL! This is just one of the things that makes the HB.25 The HB.25 features Double Ball Bearings, more than just another face in the crowd. V4x 28 Shaft, Perry Carb and it’s complete with a Muffler of its own. Write for FREE COLOR CATALO G 'Other HB Engines with the Integral Radial and Beam Mount feature are: HB.20, HB.15 and the HB.12, they HB-ENGINES also come complete with Mufflers. Made mW. Germany

BAVARIAN PRECISION PRODUCTS CO. · p O Box 6. Depi C. New C i. Connecticut 06840

Canoga Park, CA 91307. It covers the title I think the most important factor is Giant, cutting the required time to be subject extremely well, and should that Ace is trying to fill the personal there significantly. In addition, the definitely be on the shopping list for needs of the modeler. This can be most Sunday air show was dropped, making it those involved in, or contemplating significant to the scale modeler, as he possible to utilize as much time as might entering this exciting phase of the very often has special needs and whims be needed to complete at least four hobby. for specific projects. I realize that other rounds. (That number was flown last I understand a more advanced publi­ systems have various options available, year in Seguin). The scale flying on cation on the subject is now in the but the problem often develops that the Sunday is to be advertised as the attrac­ works by the same author! I wonder if it modeler doesn’t have the accessibility to tion or "air show," if you will. will include plans for a 1/4-scale flying the manufacturer to bring about special Additional reasons for lack of atten­ lawn chair? After all, it flew, was wit­ arrangements. Since you are dealing dance in scale at past Nats have included nessed and documented, and is now a with modelers, you will find a sensitivity things like location, site conditions, cost part of aviation history! to your needs which is not always of entry, etc. It is now just two weeks Talking about aviation history, do you present. If you wish to investigate before the 1982 Lincoln Nats, and I have suppose there is any truth to the report further, contact Ace R/C, Inc., Box 511, received the "final” tubulation of that Icarus is supposed to have said “ Hey 116 W. 19th St., Higginsville, MO 64037. entries. (Some possible late entries fellows, watch my victory ro llllll... · *I Phone (816) 584-7121. could occur). The results are: Sportsman ’Tis a Puzzlement Sport Scale, 4; Sport Scale Experts, 20; The song from Rogers and Hammer- Giant Scale, 4; and Precision, 2. Even an Scale...... Continued from page 24 stein’s "King and /" seems appropriate expensive calculator will only come up in this little discussion. Last year I had the with a total of 30 entries. What did I do surface movement, and retains inde­ opportunity to handle the R/C scale wrong? pendent trim capabilities. So many older event at the Nats for the first time. For I would sincerely appreciate some type aircraft fly poorly without coordi­ some time, including last year, I heard feedback from those of you who can nated rudder-aileron movements that many persons voice opinions as to why afford a twenty cent stamp as to reasons this would be a most welcome addition. the scale event had become less popular for the lack of Nats scale activity. This I enjoy the servo reversing switches, at the Nats while, in general, scale could include personal reasons such as throw adjustments, and the trim throw activity was showing a definite increase economy (job problems), timing, etc., adjustments. It’s handy to have a maxi­ about the country. The reasons most and changes you feel that might be mum amount of trim throw for those often given were that first, you were helpful. Direct your comments to me at first flights, but then have the capability required to turn in your models on 4109 Concord Oaks Dr., St. Louis, MO to back off on this as you’ve worked the Wednesday, while not flying until Satur­ 63128. Be assured that I will pass them on bugs out in subsequent flights. The cross day and Sunday; secondly, the amount to the remainder of the Nats Council. trim I felt at first might be somewhat of time available was insufficient. Products, Comments, Help, and Stuff strange, but it’s so much easier to use the A sincere effort was made this year to At Reno, we found the wandering left hand to trim the elevator and alleviate these as much as possible. Static soul, Dale Willoughby, with his trusty ailerons (Mode II) without having to judging time was moved to Thursday for packs of aircraft photos he gathers reach across the box. Precision and Friday for Sport Scale and from trips around hither, thither, and NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 73 H81 Black, one part H10 White and one part H49 Cub Yellow. Mix them together, add an equal amount of Part B Flat Hardener and you've got WW-II Olive Drab. ø C 3 To go along with the OD, we next SPRUCE PLYWOOD COVERING SUPPLIES matched NEUTRAL GRAY 43, FS 36173, so you can paint the undersurfaces of those USAAF aircraft. The formula (or this color is: Four parts H10 White, two parts H81 Black and one part H26 Light Blue. Again, use Part B Flat Hardener for the proper matte finish. A word of caution. These formulas were developed using HOBBYPOXY epoxy enamel standard colors. You won’t be able to use any other brand of paint to achieve the same result, as their pigment concentrations and colors are not the same as ours. And while on the subject of color accuracy, it should be noted that the apparent hue and value of any color will shift depending on the type of light it's AIRCRAFT SPRUCE & SPECIALTY CO. viewed in, and that matte colors will PO BOX 424 · FULLERTON. CALIFORNIA 92632 · (714) 870-7551 appear darker as the surface gets glossier FIRST IN SPRUCE-Súcond to None In Building Supplies and lighter if you spray them a bit "dry." The formulas given produced an exact * * ************************ * match to the Federal Standard chips we ♦ worked from, when mixed 1:1 with Flat ♦ ♦ WANDIT™ * Hardener. To assure accuracy, please * t %T P I N * Dealers Invited mix each component color thoroughly 4- + tune yejr warranty) before blending with other colors. And 4 be sure the Flat Hardener is thoroughly 4 .10 ft. CORD mixed as well to achieve the proper 4 Wet or Ory 4 BARON 58 (As featured in June 7 9 Scale R/C Modeler) 4 Stick on Abrasives degree of flatness. 4 A Keen Machine' that gives exceptional PLANS We know these color formulas will be 4 sanding control for an excellent finish BEECHCRAFT BARON MODEL 58: 2 V Scale-85 of great interest to scale model builders 4 89-95 Sasic mel 1 flat Wand and 1 each wingspan-1000 sq in. (3) 3 x6 sheets $15.00. 4 Beechcraft Fin Insignia .. $2.00 and hope you'll find room in your 4 of 6 grits. 4 108 95 Builder Special mcl. 2 flat 1 hall BEECHCRAFT BONANZA A36: 2H Scale-86 magazine column to publish them. Our 4 round wand and 5 each of 6 grits wingspan-1300 sq m. (3) 3’x6W sheets $17.50 lab is now working on Sea Blue 35042, 4 129 95 Deluxe includes 3 Hat 2 half All plans have easy to read tsometnc details and come 4 round wands. I buff wands and rolled in a deluxe mailing tube. Add $1.50 for postage Intermediate Blue 35164 and White 4 10 each of 6 grits Overseas postage S8.00. Ala res. add 6% sales tax 4 37875 for all those Corsairs, Hellcats, and 4 Additional Wands and Abrasives available other WW-II Navy aircraft. After that 4 See your local hobby shop BUD CADDELL 4 1525 Badham Dr.. Dept. M. Birmingham. AL 35216 we’ll do RAF and Luftwaffe colors. We'll 4 AODIS ELMORE Eve No «214ι 288 5789 205 822-4312 send you the formulas as we develop 4 PO Box 266 · Mesquite Texas 75149 DEALER INQUIRIES INVITED 44 444444444444444444444444 them. In closing, we’d like to thank Claude yon. I’m not certain whether he had just specifically toward the scale model McCullough for all the help he provided come from hither or thither, but he has builder. We know that one of the most on this color-matching project. produced new sets of photos. A new difficult aspects of producing an authen­ Darn! Where in the heck are Russian page containing 52 new subjects, added tic finish is matching the exact color of colors? · to the hundreds already available, can the prototype aircraft. Even when a be found in the new catalog. Each entry color chip is available, it isn’t always easy gives a brief paragraph of information for the average modeler to know how to Hannan...... Continued from page 48 about the aircraft, registration numbers, mix that color from existing paints. number of photos, etc. To make life easier for the scale model Contact: Scale Model Research, P.O. builder, we’ve put our laboratory color PROXY PEANUTS IN EUROPE Box 685, Orange, CA 92666. experts to work creating formulas for Belgium is again hosting an indoor A recent communication from Pettit mixing the most-asked-for World War II contest at Flemalle, near the industrial Paint Company, makers of Hobbypoxy, camouflage colors, using standard city of Liege. Sponsored by the "Club de offered the following information con­ Hobbypoxy paints. Petite Aviation," classes will include cerning color mixing and matching. I The first one we worked up is the Sainte Formule (similar to U.S. Manhat­ suspect after the beginning items in this ever-popular and very elusive OLIVE tan), F.1.D., E.Z.B., Penny-Plane, and column, someone may think this is a DRAB 41, also known aspre-1964Federal Peanut Scale, for which proxy entries are put-on as well. It is not. The material is Standard 34087. As you know, the color invited. Previous Flemalle meets have taken directly from the communication of OD was changed in 7964, but the Feds, attracted in-person participants from and would appear to be a most helpful in their perversity, gave the new color Belgium, Holland, England, France and source for scale builders. Pettit has the same FS number as the old discon­ Germany. Flying is conducted in the mentioned that future colors will be tinued color. .. much to the chagrin of Andre Cools Omnisports hall, which added to this list. In addition, they would model builders everywhere. Fortu­ measures some 144 feet by 108 feet. like to know about other colors that nately, we were able to obtain the Although an exact ceiling height was not might be needed. (What hundred do proper FS chip and our lab has come up supplied, the site is rated Category 2. you need?) with a perfect match. Here’s the Although it is too late to enter the HOBBYPOXY PRODUCTS is proud to formula: August, 1982 event, details of the 1983 announce a special project directed Two parts H66 Dark Red, two parts championships may be obtained via

74 MODEL BUILDER r ! BO B HUNT, Managing Editor says: f l y · " “ADHESIVES? HOT STUFF & SUPER PHOTO PKDTR /AMAOA ARE THE ANSWERS!” Dear Bill and Bob, After thirty years in controline, the R/C bug has finally bitten me, and I love it! My experience in the C/L Stunt event has underscored the importance of light, straight and strong airframes. Your products, Hot Stuff and Super ‘Τ’, have helped me to reduce airframe weight, while adding measurably to strength. Once perfect alignment has been achieved, Hot Stuff adhesives allow a quick bond between surfaces resulting in more accurate, easier to trim planes. The speed of assembly allowed with Hot Stuff and Super ‘Τ' has become my favorite feature. I can now build as fast as parts can be assembled! Now that I'm building R/C planes, more uses for this fantastic duo of adhesives are being realized. I've found ' Super ‘Τ’ great for kit building where parts don't always fit perfectly. Hot Stuff is great for positioning glass cloth when joining foam core wings. I simply tack the cloth at the edges as I work the wrinkles out, then fill the weave completely with Hot Stuff. Whether C/L or R/C, Hot Stuff and S u p e r‘T’ are the answers when the question is which adhesive! HOT STUFF R , ™ Bob Hunt, IS

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NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 75 worth it except for the modeler’s per­ w sonal gratification? (Right on! wen) Flying: Boy, oh boy. Here were top flyers, but alas, all were faced with 5000 foot elevation, with the temperature SIZES! giving a density altitude one day of 7800 Competition-Proven feet. Plus light and variable breezes to occasional gusts much of the time. But also, calm early mornings when one flies O C TU R A at the equivalent of lower altitudes. And suddenly things are much different. There is astonishment on the part of X-SERIES each flyer, wondering why his model is not performing as it should; and with PROPELLERS only three flights, one doesn’t get it all mastered. Turns must be milder . . . a lot of X-tra SpeedL.X-tra Performance! planes literally fell out of tight turns and dropped like rocks. Take-offs were hazardous, with not enough power. FOR PERFORMANCE YOU’LL BE PROUD O F... Some wound up ground-looping, or These, as all Octura Propellers, meet the most exact­ staggering into the air, faltering and ing requirements. Available now in beryllium copper. Fit 3/16" shaft. Check your local progressive hobby falling from low altitude, while others shop. finally "made it." All rather exciting (on X440/3 RECOMMENDED APPLICATIONS one’s heart, that is!) Comment: Nearly X445 all the models were tail-draggers. Nearly X447 X450 7.5 OUTBOARD all landings were wheel-landings, which X455 made sense, but once rudder control X455/3 .65 SCALE HYDRO was lost, anything could happen; X457 .65 DEEP VEE ground-loops, nose-overs, or a combi­ X460 nation of both. Some flyers lucked-out X462 •X467 and had beautiful roll-outs. Never a dull moment. Outstanding performers to my eyes were: The Belgian De H Mosquito, which sounded like a finely-tuned sewing machine and flew great! The PBY Catalina in Danish markings. It was also a sweet-sounding job, that performed International Reply Coupon from: F. Nearly all flight activity was in full view of very well, but at about three times scale Van Hauwaert, Grand Place 1, b 52, the audience. All-in-all, everything was speed. Two Tiger Moths, one from Β-4Ί10, Flemalle, Belgium. pretty well organized. Canada and one from New Zealand, THE OTHER SIDE OF Since we had purchased the "sup­ both flew realistically and smoothly. A THE SCALE SPECTRUM porters" package, we were given badges 1/5th size Tiger Moth from Sweden also Although the Reno R/C Scale Inter­ to permit entrance into the hangar that flew well, as did a 1/4 size Sopwith Pup nats are being well covered by Bob housed all the models for display and from South Africa. Other models flew Underwood, we felt that a report by judging. There were a lot of models . . . great until they "lost their footings" scale model builder Bill Kee, of Twin both Stand-off and Precision types. All in the thin air and crashed. Made one Falls, Idaho well worth sharing, from an were very fine . .. sort of made you want sick. enthusiast/spectator's point-of-view. to go home and learn how to build A West German fellow, confined to a We have slightly edited his story, which again! wheelchair except when flying at which he entitled: OPINIONS, COMMENTS, What caused me to "flip " the most? time he used a stool-like affair, flew, in NIT-PICKING. Rib-stitching and rib tapes. Now there is my opinion, the most perfect flights The Opening ceremonies of the something I must attempt . . . a study in from the take-offs (straight and true) Championships started on time with the patience. Some "pinked" tape was, of through landing roll-outs, on all three raising of each team's national flag, and course, way over-scale. However one flights. Smooth and precise. the playing of a stanza or so of that West German model had nearly scale A Canadian Sea Fury looked fine until team's national anthem over a GOOD pinked edging, small enough to catch it too fell out of a turn. Such a thing public address system. Very impressive, your eye. He had to have made a die of happened so fast that even when looking and it made one's (mine, anyway) spine some sort to accomplish this. right at the model, one’s mind hadn’t feel "funny" . . . flags were raised in The WWII and more modern models caught up before the sound of the alphabetical order, which made the U.S. do not appear (to me anyhow) as crunch. .. last. At the start, the FAI flag was raised detailed as the biplanes, but the detail The Reno R/C club members did an in the center of the 17 poles, then the was all there upon close observation. outstanding job of preparation, policing AM A, Nevada state flag, followed by the Sometimes the color detracted from the area, and clean-up. All wore jump­ Australian, Belgian, etc. After the flag- quick notice of detail. (There is an suits with their club logo on the backs, so raising, the Sacramento R/C club’s show important message here to all builders they were easy to spot. team put on a fast and enjoyable per­ of scale models, w.c.h.) Bonus extras: In addition to the model formance, and the remainder of the Workmanship, both in Stand-off and flying, we witnessed tests of the Lear Fan afternoon was devoted to judging and Precision, was of the order one would and OMAC-1 canard. Then there were practice flights. expect; very good. Nothing "half- the antiques and home-builts from I immediately felt "at home" at the done." Comment: Once a plane taxied California. Of special note was the FW Stead field, a former air base, out in the out for take-off, there was no difference bipe in Swedish markings, flown by wide open spaces where you could between a Stand-off and a Precision Monty Grove’s son, the prototype for stretch eyeballs and elbows in a quiet, model, in spite of all the extra work that one of the R/C entries. And a real, live easy-going small-airport atmosphere. goes into a Precision job. Is it really Tiger Moth in Swedish markings, cor-

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RESULTS 11. Millard Wells U.S. Micro-Velz P io n e e r: 12. Millard Wells U.S. Wee Bee 13. Jack Little U.S. Fairchild 24 Placing/Pilot C o u n try Su b ject 14. Phil Cox U.S. Druine Turbulant 1. Dr. John Martin U.S. Santos-Dumont canard 15. Millard Wells U.S. Huntington H-12 2. Ranier Lotz W. Germany Santos-Dumont canard 16. Walt Everson U.S. Waco E Chiribiri 3. Mike Arak U.S. 17. Bill Criss U.S. Bellanca 4. Tabloid Ken Groves Canada 18. Jerry Skrjanc U.S. Farman Moustique 5. Tom Sutton U.S. Annular wing 6. Jim Miller U.S. Ponnier M o d e rn : 7. Bob Clemens U.S. Nieuport IV mono 1. Jack McGillivray Canada Yugoslavian 45T (twin!) 2. Jim Miller U.S. Piper Vagabond W arplanes: 3. Lou Liefer Canada Volksplane 1. Dave Kiefer U.S. Sopwith Tripe 4. Siegfried W. Germany F.R.E.D. 2. Jack McGillivray Canada S.E. 5 Glockner 3. Mike Arak U.S. Nieuport 17 5. Jim Miller U.S. Itoh 4. Dr. John Martin U.S. ? 6. Dave Kiefer U.S. Pitts 5. Tony Sutter U.S. Heinkel 100 7. Mike Arak U.S. Piper Vagabond 6. Alfred Genther Switzerland Douglas A-26 8. Bob Clemens U.S. BD-4 7. Walt Everson U.S. P-51 Mustang 9. Bill Criss U.S. Cougar 8. Bill Hunter U.S. Fokker triplane 10. Millard Wells U.S. Piper Vagabond 9. Stephen Oxley U.S. Hellcat 11. Bill Hunter U.S. Piper Vagabond 10. Jack Little Morane-Saulnier N U.S. ju n io r: 11. C.E. Roth P-51 Mustang U.S. 1. Bryan Varney U.S. Cougar 12. Millard Wells U.S. Lockheed P-38 W eirdos lu n io rs : 1. Warren Shipp U.S. Avro/Cierva Autogiro 1. Mike Escalante U.S. Bristol Scout Z Bill Hannan U.S. Chauviere Gyroptere 2. Chris Scott U.S. Martinsyde 3. Dave Kiefer U.S. Sopwith triplane Golden Age: 4. Jack McGillivray Canada Yugoslavian 45T 1. Alfred Genther Switzerland Bucker Bu 131 5. Millard Wells U.S. Curtiss triplane 2. Bob Clemens U.S. Farman Moustique 6. Alfred Genther Switzerland A-26 3. Dr. John Martin U.S. Dornier Merkur 7. Bill Hunter U.S. Fokker triplane 4. Millard Wells U.S. Winnie Mae 8. Tony Sutter U.S. Annular wing 5. Bill Hannan U.S. Chauviere Gyroptere Fike/Lacey class: 6. Warren Shipp U.S. Avro/Cierva Autogiro 1. Ken Groves Canada Fike 7. Millard Wells U.S. Curtiss triplane Z Jim Miller U.S. Lacey 8. Jim Miller U.S. Piper Cub 3. Butch Hadland England Lacey 9. Phil Cox U.S. Buttercup 4. Don Lockwood U.S. Fike 10. Walt Everson U.S. 8ucker Jungmann 5. Don Lockwood U.S. Fike

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 77 up to 400 feet in about two minutes, with plenty of altitude to clear obstructions in the first circuit around the field. The controls are positive but not jumpy. As with all electric gliders, you need between a quarter to half throw on down trim on the power climbout, otherwise the nose will pitch up and it could cause a stall. The glide, motor off, is not fast, not slow, something in between, with good penetration into the wind. I would not hesitate to fly the Oly 650 in winds up to 15 mph, though it would be hard to do for a beginner. The glide, like all electric gliders, requires from half to full up trim on the elevator. Stalls are straight ahead, no tendency to fall intoaspin,and the plane will recover by itself if you leave it alone. Turns are super simple; gentle ones require only rudder, steep ones require some ele­ vator. You could fly the entire flight rudder only if you wished. The plane senses even small thermals with a definite “ bump” ; it pitches up if it runs straight into one, or banks away if it brushes one. I have not had any good thermal days yet, so my times are between ten to fifteen minutes with just power. This usually consists of three responding to a 1/5th scale entry from Bob Peck, Sandy Peck and their asso­ power runs up to about 400 to 600 feet, that country. A model shipped halfway ciates appeared recently on a San Diego then glides. I can even do loops from 'round the world, and what happens, TV program. Although of brief duration, level flight, impressive for a plane this but a full-size one in identical colors flies the presentation was comprehensive size with an 05. As the battery is easily in. Who wouldn't be excited? and included coverage of Peanut kits, an accessible, two packs would have you The awards presentations were held interview with Bob, and demonstration flying continuously until you are worn facing the flags, with the antiques and of a remotely-controlled camera outl Landings are a delight, verrrry homebuilts parked close around as a mounted in one of the Peck-Polymers smooooth, just float in, to a zero speed background; a Ford trimotor occupying electric-powered blimps. flare a couple of inches above the grass. the central position. National anthems SIGN-OFF This plane never fails to pull the spec­ were again played, following trophy ‘‘There’s a child in all of us ... for­ tators, as the Solarfilm is transparent presentations. All-in-all, the entire week tunately, to help overcome our 'adult­ yellow; they can see the structure, and was well worth it, and I'm glad I ness’." ANON · all of them have wanted to build one attended. after they see how strong it is, and how FAREWELL NICK Electric...... Continued from page 35 perfectly the parts fit. So, I'll admit, this is Another fine model builder, Dominic a rave review, but the Olympic 650 is J. Bressi, has passed away. A retired civil worth it, it is rare to get so much value engineer and long-time member of the done by the Radio Shack push-push for your money as you do for this one. Flightmasters club, Nick specialized in switch actuated by full down elevator. Try it, you’ll like it! Congratulations, small flying scale models, and was a The plane was covered in Solarfilm, and Airtronics, on a job done right. familiar competitor at Mile Square free weighed 46 ounces with two channels, Among the many items that Bill Gil­ flight contests, as well as at indoor events Cannon receiver, and a 250 mah receiver christ sent me in his letters was a com­ near his Sacramento, California home. pack. The span is 72 inches, the wing ment on using voltage regulators to run We join his many modeling friends in area is 650 sq. in. the receiver from the motor battery extending sympathy to Nick’s wife, The flights were excellent, right off pack. His experience was not so good; Deborah, and family. the board (true I), no adjustments neces­ he was using an Ace R/C flight pack with PECKS ON TELEVISION sary at all. The climb is a good steady pull Bantam Midget servos, and a Kraft transmitter. His plane had glitches on takeoff and in the air; the latter seemed NOW YOU CAN BUILD THE EXOTIC HOWARD HUGHES RACER to be relative to the distance and direc­ tion from the transmitter antenna. It almost took over the flying, and in a later φ % scale 8ft wing span flight, resulted in a crash on takeoff. He φ Fiberglass fuselage 4 lbs has used a regular flight pack for the φ Foam receiver since then, and has had no φ Weight approx 34 lbs problems, so he is pretty sure it was the φ Engine 4 horsepower regulator. He would like to know what φ Retractable landing gear experiences others have had with regu­ (optional) lators; his address is Route #1,Oskaloosa, Iowa, 52577. Also available improved version I really don't know much about the B-17- 1/10 scale -3343.00 regulators myself, as I always fly with the P-51· 1/4 scale .5349.00 250 mah receiver batteries sold by Astro Call or write for special introductory NNESCR4FT Flight. I would imagine that not all price on HUGHES RACER. P -O . 8 0 * 6 2 3 regulators are "within specs,” and it Chatsworth. California 91311 Allow two weeks for delivery. T e le p h o n e 213-998 8533 would be a very good idea to check with a voltmeter how much voltage the 78 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 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1981 ROAR Nationals! Boston-Mike Lavacot/Team Associated wins Indoor Modified. Reedy motors win M modified classes for 4th year in a row. 79 MORE PHOTOS W REPLICA OLD TIMERS George Murphy came in for his share FREE FLIGHT OR RUDDER ONLY R/C partial kits ^ of attention with his Frank Ehling Model .020 GAS OR ELECTRIC POWERED F U L L K IT S called the “ 4-1/2 Hour Flyer” . George T H E . t s l took this columnist’s drawings scaled up From 1936 from the 1935 Zaic Year Book and made The FLYING QUAKER 81" Span $21.50 additions and corrections to put the plan From 1937 Goldberg's 19M0 Sailplane The OUAKER FLASH in first class shape for anyone wanting to 6 13 Scale, 36H Span 67" Span $17.50 $11.95 reproduce this particular model, as can Additional .020*: 30M Buzzard Bombshell. $11.95, Both are Rib. Tip, and Former Partial Kits. They 38" Playboy S r . . $12.95. 31M New R u le r. .$13.95. feature Machine Cut and Sanded Parts. Full Size be seen in Photo No. 18. 36" Miss Am erica. $12.95, 36" C lip p e r MK II. $11.95 Construction Plans (* Megow's Plan), and Extens In the early days, most of Frank 36" M e rc u ry, $13.95, 30.5" R a nge r. $13.95. 36" ive Building Notes. For Free Flight or R/C. they Super Buccaneer. $11.95. 30" Request. $12.95; both meet all SAM FF and R /C re q uirem ents. Ehling’s models went unnamed. Frank 35" Tw in Cyclon e , $12.95, 36" C ava lie r, $13.95 freely admits he never bothered to put a "SERIES 50” OLD TIMER ”>0 WINGSPAN The LONG CABIN’ title on any of his designs, preferring to AIR TRAILS SPORTSTER. $39.95 78" Span. Classic Cabin. Plan Included. let the model editors cook up a title. P O W ER H O U S E. 539.95 19 3 7 $20.00 09 T O .15 3 C H A N N E L R C Some like the G.E. Cabinette were in­ At your Dealer or correctly named, as Frank had originally add $2.00 per order^ord e r^ for UPS. Ca. Res said “ Gee! Cabinette!” You can save ______8044 Legion Place. No.6. Midway City. Ca 92655 add 6* for T a x■ . M that bit of trivia for your next club meeting. receiver is getting when the battery pack (heat), but does reduce the capacity Now how about Photo No. 19, show­ for the motor is getting low. I do know somewhat, to 1.1 Ah., compared to 1.2Ah ing a good old Super Buccaneer as built that if there are glitches, turn the motor for the yellow Sanyos. Thanks, Heinz, by Nick Notte of Hartford, Connecticut? off if at all possible, then the voltage of that does clear up the mystery for me, at Without a doubt, this was the best selling the motor pack will go up and the least. I have found that the yellow kit in the early days. The model was regulator will do better. I have used Sanyos are quite tolerant of chargi ng at 4 rugged, flew very smoothly and checked droppi ng diodes to run the receiver off a amperes, if you are using a digitial out easily. It was a natural for early R/C six cell pack in boats, but never in charger, and stop the charge as soon as gear, and many a modeler built a Super planes. I find that the Cannon receiver I the voltage stops rising (don’t wait for a Buccaneer for a possible R/C conver­ use likes three dropping diodes. Each drop!). My Sanyo packs have given sion. diode subtracts about a half volt from excellent service under these Of interest to the modern modeler is the pack voltage. This is also common conditions. the fact that Bill Effinger, original pro­ practice in the 1/12th scale cars. If Well, now, let’s race electrics! · ducer of the Buccaneer under the name anyone is bold enough to try it in planes, of Berkeley Models is again producing let me know the results, I am interested. plans for this model. Plans are also being Try three diodes first, and try a range test Plug Sparks .. Continued from page 40 made to again kit this famous old model. with the motor pack low first. Don’t try it Ta-Dah! Weare proud to presentwhat with your favorite plane! Eastern States Gas Champ, as originally we regard as the ugliest gas model of all Heinz Koerner sends some good designed, built and flown by Russell time, the “ Blue Dragon’’, the 1934 items quite often too; he explained the Simmons. As Sal used to say, Russell and English Record Holder as designed by difference between red and yellow his brother would come to the contests Col. C.E. Bowden. Photo No. 20 shows Sanyos beautifully. I’ve mentioned that dressed in their Sunday best. The jokes the handwork of Danny Sheelds, of the red Sanyos are popular in Europe and kidding would stop at the end of the Baltimore, Maryland. A very faithful and are more tolerant of overcharging meet as invariably Russell would cop a reproduction except for the Brown Jr. in than the yellow Sanyos. The red Sanyos first place. Photo No. 17 is an excellent the nose. The original had a Comet 30cc are available from Wilshire Hobbies in reproduction by Jack McSwiney, using for power. this country. Anyway, the red Sanyos the power as originally designed for it Actually in describing the model as have a thicker and heavier insulation . . . a Super Cyclone. Jack’s model was a ugly, one must remember in those early between the layers in the battery. This good flyer, but was plagued with grem­ days no one knew how to design a gas makes it more tolerant of overcharge lins. Gettum next year! model. Most of us put tails on them in

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80 MODEL BUILDER UUH6N P€RFORMflNC€ COUNTS _£P-1 MRV€RICl· CHRNNCL RADIO for .40 .61 €NGIN€ 1032 square inch wing area 59” span 44” length weight: 4.5-5 lbs. BASIC D6SIGN RDVRNTAGC...... • The Canard improves vertical performance while reducing wing loading. • The Spoilers eliminate adverse yaw while improving initial roll rate. • Pusher Propulsion eliminates propeller disturbances over airfoils.

Full size plans with templates & instructions $25.00 includes shipping in mailing tube. California residents add 6% Sales Tax O. V. €NGIN€€RING P.O. Box 427, Palmdale, CA 93550 the same proportions as rubber models. not the most beautiful finish in the years ago, this kit could still be found on With such large tails and about triple the world. Sheelds further reports that the dealer’s shelves. If one were to prowl flying speed, gas models were very Bowden is still active, experimenting around some of the older stores in the touchy to trim. with boats, rockets, etc. You never seem sticks this writer is willing to bet at least In those days, to set a record (if you to get old when you spend your time one of the old Wally Simmers designs happened to have a gas model that modeling. could be found, i.e., Jabberwock, Golly- flew!) you simply gassed it up and Another model that isn't so pretty is wock, Dyna-Moe, etc. All good flyers. turned it loose. Needless to say, many the Lanzo R/C model that won the first Some interesting statistics were re­ gas models were lost under this system. R/C trophy, the Roberts Cup. Bucky ceived from George Armstead, Contest Even the Colonel's record of 12 minutes Walter, member of SAM 39, the same Manager. He reports the average con­ plus was set with the motor still running club that Lanzo belongs to, built this testant age was 50.3 years. We’re getting and disappearing into the clouds. This model as seen in Photo No. 21. Bucky has older men! Youngest entry was 14 and record, incidentally, was never broken been having a lot of good luck with this oldest was 81 (no! not me!). Here’s a in England, as the rule changes in 1937- model as can be attested to by the tricky one: only 15 out of 143 were under 38 prevented it. number of wins. Bucky thinks this Lanzo 40. Does that tell you what this columnist For those who are interested, the design is a good one for the Texaco has been preaching? (And what this Colonel still lives in retirement in a large Event. Just goes to prove, beauty is in the editor has been preaching! Youngsters manor. Daney Sheelds reports in a visit eye of the beholder! cannot find stick-and-tissue model to see the old boy, he was astonished to Getting along, Photo No. 22 of Walter airplane kits in any type of store, as they see six rooms just jammed tight with Hartung, Detroit, Michigan, is offered to could four to five decades ago. That's models. Bowden was a prolific builder, show that Midwest Jabberwocks are where we all came from! We are an but finished them about all the same quite competitive in old timer rubber endangered species. Maybe that quali­ way. Muslin cloth with white paint... cabin events. Up to about five or ten fies us for federal assistance! wen)

For information send $2.00 to TECHNOPOWER II Inc. 16650 So. 104th Ave., Orland Park, IL 60462

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 This writer honestly believes people like to see their name and face in print. After all, we all like some form of recognition, even if it is a brickbat! Flex-I-Grit We probably could have written how Bruce Norman spread-eagled the field in capturing the Sweepstakes R/C A». Flex-I-Grit: A tough, Trophy, or we could have pointed out new sanding film bonded the excellent flying by Sal Taibi and to polyester. Won’t crack, peel, clog, scratch or Bruno Markiewicz in free flight, but break-down. Can be heck, we know that! This columnist does 9 used wet or dry. Re- hope the foregoing presentation of useable. Outlasts ordi­ photos pretty well sums up the 16th nary sandpaper. Assort­ Annual SAM Champs. Okay, let's see ed grits available in gar­ those results so that in ten years you can net, aluminum oxide and settle a bet. silicon carbide. Send 25 cents for catalog and FREE FLIGHT price list. K & S Engi­ Class C Cabin neering, 6917 W. 59th 1. Sal T a ib i...... 360 St., Chicago. Illinois 2. Al Bailey...... 346 60638. Telephone: 312/ 3. Larry F a ir...... 340 586-8503. 4. Jim Walston...... 338 5. Bruno Markiewicz...... 332 Class A Cabin 1. Jim Walston...... 360 2. Bob Edelstein...... 335 3. Bruno Markiewicz...... 332 4. Woody Bartelt ...... 305 5. Jim Robinson ...... 293 Class C. Cabin Glow/lgn Some other facts gleaned from Arm­ Or how about Photo No. 24, showing 1. Sal T a ib i...... 320 stead’s report was that there were 275 Gerald Donohoe of Central Falls, Rhode 2. Bruno Markiewicz...... 315 entries in free flight for 23events and 220 Island, with a Red Ripper. This design is a 3. Tom Lucas...... 276 entries in R/C for only 9 events. A slight real goer, but darn few fellows build it as 4. Nick W yeth...... 274 bit of overbalance here. it seems to be an off-beat design. Gerry 5. Ed Konefes ...... 261 Cabin-Rubber Playboy designs continue to dominate says there is nothing wrong in the way 1. Jim Fiorello...... 360 the competition. In R/C, 18 out of 45 this model performs. 2. Carmen Botticello...... 348 trophies were taken by Playboy designs! Finally, the last photo we present (No. 3. Stan Colson...... 338 Maybe we ought to adopt a handicap 25) is of Bob Schlessberg holding a 4. Bob Bissett...... 304 system based on the number of wins so rubber powered flying scale of a Vought 5. Alex Dashko...... 291 that other designs would be built. This V-143. This was originally a 50-cent kit Class A Pylon system worked in WAM Flying Scale back in the late thirties. Many people 1. Sal T a ib i...... 360 Controline. Why not in old timers? have asked whatever happened to the 10 2. Jim Walston...... 323 and 25 cent kits, but Bob Peck of Peck 3. Bill H ale...... 320 Armstead also points out the free 4. Mitch Post...... 312 flight events were dominated by the Polymers can answer that with the 5. Gene Martha ...... 310 popular designs. As some examples, statement that the boxes alone cost 30 Sec Antique how about Strato Streak in 020 Replica, more! In any respect, rubber powered 1. Bruno Markiewicz...... 450 So Long in Cl. A Cabin, Alert in Cl. B flying scales are very popular with the 2. Mitch Post...... 360 Pylon, Brooklyn Dodger in Cl. B Cabin SAM 7 modelers. Bob’s model is an 3. Herb W ahl...... 357 and Playboy in Class C. It would appear excellent representation of a well built 4. Bob Edelstein...... 335 these designs have proven their point. and neatly finished model. Flies too! 5. Bob Bissett...... 318 How about something different? Before we get to the results, perhaps 020 Replica-Pylon some of the readers will be a little disap­ 1. Mike Poorman...... 360 Now you take Photo No. 23. Here is a 2. Bob Bissett...... 295 shot of Louis Carami's well known pointed we didn’t describe the Champs 3. Kevin Barrett...... 293 “ Molecule” , but very few built to date. It a little more in detail. But what the heck, 4. Fred Schlegel ...... 285 is models like this that need encourage­ once you have seen a green tailed 5. Merl Shammo...... 280 ment. Certainly is a pleasure to see dragon with polka dots you have seen all 020 Replica Cabin different designs. green tailed dragons with polka dots. 1. Bill H ale...... 304 2. Bob Edelstein...... 286 3. Rich M clellan...... 277 4. Jim Walston...... 269 GIANT SCALE CHOKE 5. Henry H ill...... 227 HL Glider 1. Jim F iorello...... 320 For TILLOTSON 4 and WALBRO 55 2. Peter M ann...... 313 carburetors 3. Dick Sherman...... 303 4. Denny D o c k ...... 250 Easy installation—uses two existing 5. Ed Konefes ...... 171 carburetor screws Pylon Glo/lgn CIC Positive acting, spring loaded choke 1. Tom Lucas...... 306 arm 2. Bob Edelstein...... 305 Can be servo or manually operated 3. Sal T a ib i...... 248 4. Harry Fager...... 235 Floating neoprene disk "chokes" 5. Allan Mårtenson ...... 111 better than a finger and easier. 8.95 Twin Pusher 1. Dave D odge...... O.O.S. 2. Bill Bell 3. Mike Poorman TATONE PRODUCTS CORP. 4. Karl Spielmaker 1209 Geneva Av« San Francisco Ca 94112 14151334-7189 5. Tim Banaszak

82 MODEL BUILDER Class C Pylon 1. Woody Bartelt ...... 697 Z Tom Lucas...... 577 DU-BRO 20" FLEX-CABLE 3. Bill H ale...... 480 4. Mitch Post...... 349 MOTOR CONTROL 5. Bruno Markiewicz...... 348 Provides the ultimate Scale-Gas in control cable 1. Bill Bell...... 132 assembly. Highly 2. Sid Sutherland ...... 79 flexible, free running and adjustable at control horn. Pylon Glo/lgn Cl. AB No. 1 6 5 ...... $1.49 1. Bruno Markiewicz...... 302 2. Jim Robinson ...... 291 3. Louis Black ...... 249 HEAVY DUTY PLATED 4. Harold Fager...... 244 FOR THE BRASS DURA-COLLARS 5. Jerome Persh ...... 211 7/32” Baby R.O.G. 1. John Stott No. 243 Z Bob Champine PERFECT 1/4" 3. Gene Hartmangruber No. 244 Compressed Air 2 For 1.00 1. John Stott...... 227 2. Danny Sheelds...... 165 r ------'N 3. Loren Schmidt ...... 149 NOSE JOB HEAVY DUTY 4-40 ' 4. Karl Spielmaker...... 145 5. Chet Bukowski...... 133 Rubber Stick BALL LINK 1. Ray Factor...... 360 2. Sal T a ib i...... 356 3. Gene Martha ...... 353 4. Alex Dashko...... 348 STEERABLE NOSE 5. John Stott...... 336 (i GEAR Small Cabin (Glo/lgn) Shown actual size, 1. Bruno Markiewicz...... 480 Quality, shock this new hefty ball link Z Jim Walston...... 360 absorbing is perfect for any 1/4 3. Bob Edelstein...... 318 nose gear. scale application. 4. Jim Robinson ...... 302 5/32"heavy Featuring a strong, 5. Sal T a ib i...... 302 duty wire. 4-40 threaded steel Scale Rubber Complete with ball and a new, heavy 1. John Stott...... 295 Nylon Nose Gear duty nylon socket. Z Bob Moulton ...... 286 Blocks and Also excellent for R/C car 3. Bob Bissett...... 280 ^54 Steering Arm. steering linkage. CAT. No. 259 4. Chet Bukowski...... 269 No. 152 s? 9S Each 5. Ray Factor...... 243 tB #*tit* $1.25 Class B Cabin No. 153 S2 9S Each tS lM 'tjM l DU-BRO KWIK-LINK*!< 1. Sal T a ib i...... 653 No. 1 5 4 S 75 Each 2. Bill H ale...... 355 i Nose* Gear W No. 109 . . 75c 3. Paul Nelson...... 270 BLOCKS For 5/32’ Λ .3 ** \ 4. Chet Bukowski...... 264 DU-BRO HEAVY DUTY 5. Eric Mårtenson...... 232 wire. fí .020 Electric 1. Bob Edelstein...... 275 No. 156 . . $1.25 Z Larry Fair ...... 271 HINGES 3. Arnoldo Hernandez...... 271 4. Fred M o v e l...... 203 W ith 5. Joe Beshar...... 120 VA" Class B Pylon STEERING ARM Removable 1. Bruno Markiewicz...... 347 ASSEM BLY ^ C otter Pin Z Herb Wahl...... 344 3. John Lessig ...... 341 Nylon steering arm s = © = = · 4. Mitch Post...... 341 with brass bushing 5. Jim Robinson ...... 305 and set screw fits Shown actual RADIO CONTROL 5/32” nose gear wire Texaco size, these 1. Chet Lanzo...... 2748 strong, nylon Z Jim Buice...... 1684 — hinges are 3. Loren Schmidt ...... 1641 built to take heavy loads. Dimen­ sions are 3/4" wide x 1-3/8" long 4. Arnoldo Hernandez...... 1400 NEW 5. Steve Boucher ...... 1223 SNAP-ON X .040 thick, using a 3/64" Class B E-Z diameter cotter pin for maximum 1. Bruce Norman ...... 1561 CONNECTOR convenience and strength. 2. Art Peterse...... 1528 INCLUDED Ideal for 1/4 scale models 3. Hugo Mercoli...... 1182 $1.25 15 Per Pkg. 3 .7 5 No. 257 4. Jack Swain...... 1129 5. Rodgers Barton ...... 1080 1/2 A Texaco 1. Joe Beshar...... 1427 DU-BRO PRODUCTS1 Z Stew M urray...... 1358 3. Rodgers Barton ...... 1229 INCORPORATED 4. Don Schnieder...... 1217 4Θ0 Bonner Road Wauconda. Illinois 60064 U.S.A. 5. Art W hite...... 1110 NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 83 Next was "Model Matters,” featuring The Dope Can (it really didn’t mean Flying Near Airports? Be Careful! anything else in those days) by Gordon Light. Then came an article on prop Free Flight or Radio Control flying near airports, or in any situation which might fittings by Dick Korda, top rubber involve the possibility of models being in the vicinity of full-scale aircraft modeler of the day. operations, must be avoided—or conducted so as to eliminate any dangerous OurOT Model of the Month appeared situations. Models should not be flown in the proximity of full-scale aircraft next. If you remember Al Casano’s operations unless the flyer has someone else with him for the sole purpose of designs, you’d probably agree they were watching for full-scale aircraft and supervising the flying so as to prevent accident functional, but not always pretty. The possibilities. sometimes angular outlines cut into PROTECT YOUR RIGHT TO FLY! what would ordinarily constitute the esthetic beauty of many other designs of the time. In my opinion, however, this Safe Flying Is No Accident! stick model was simple, clean, func­ tional, and had a "just right” look about it. Being chicken about heavy rubber motors, I really liked the 3/16 square fuselage construction! On the next page. Herb Weiss pre­ Antique sented an article on model helicopters, n - , ANTIC-BIPE 1. Bruce Norman ...... 1800 “ Ceiling Walker” style, but more exotic. I rO C fO r V4 SCALE KIT 2. HugoMercoli...... 1777 Following three-views of a Douglas 3. Joe Percy...... 1733 DB-7 for France came Part II of Henry 4. Dick Huang...... 1632 Struck’s "New Ruler" article (now 5. Esio Grassi...... 1378 you know how I found Casano's Stick Class C 1. Ralph Turner...... 1026 model .. . wandering through the mag 2. Bruce N orm an...... 999 when writing about the “ New Ruler!’’) 3. Steve Mozuwkewich...... 966 After another three-view and a brief 4. Jim Buice...... 920 article on building a Stinson 105 solid 5. Joe Percy...... 870 model (you know what a solid model is,

MAJESTIC WW-1 ERA TWO SEATER, WHEELS OR FLOATS Well, that wraps up another beautiful don't you? Even plastic models aren’t VERY DETAILED SCALE DESIGN, YET EASY ASSEMBLY SAM Champs. Seems like they get better solid!!) We come to the model ads that SPECTACULAR FLYING QUALITIES, FULLY ACROBATIC. every time. In the next issue we will run make old timer addicts drool; kits for a 64IN. WINGSPAN. 7.5 LBS.. USING .45 ENGINES AND UP. an account of the Old Timer Events at few bucks, all kinds of juicy ignition C O M P LETE KIT, LESS WHEELS. ENGINE 8 PROP S 149.00 +-SHIP (soma 820 parts, detailed construction manual A 5 sheet plans) the Nationals. These were the very start engines . .. how about an OK Twin 1.2 PROCTOR. P.O. BOX 1333, LA JOLLA, CA. 92038 of national recognition of old timers, the cu. in. displacement for $35.00 . . . the For additional information, call (714) 278*9000, or first being held at Willow Grove, PA in Atom for $12.95, M iniature Aircraft write. For a complete 40 page catalog, send $ 2.00. 1965. Getting to be old hat now! · Corp. scale kits. Midwest’s "Jabber- wock” for $1.00 postpaid, and so on. Class A See?! An hour-and-a-half shot already O.T. Stick . . . . Continued from page 41 1. Rodgers Barton ...... 1260 on only 66 pages, and I’ve been through 2. Joe Percy...... 1212 the magazine hundreds of times since I 3. Bruce N orm an...... 1194 assignment to a highly rated fighter 4. Dick Huang...... 1137 squadron. picked it up 42 years ago. · *I 5. HugoMercoli...... 1111 The model section started on page 25, Electric with an inside cover photo and head­ R/C Boats . . . Continued from page 43 1. Loren Schmidt ...... 620 lines for key articles. 2. Dick Huang...... 480 First there was the "Thermaleer” by 3. Bruce N orm an...... 426 Dan Veronica, a beautiful, streamlined reestablishment of the Deep Vee Class 4. Steve Boucher ...... 326 was brought about by those who didn't 5. John Pond...... 274 Class C gas model with a span of 76 inches. Full-size ribs for the Chester wish to race in an unrestricted design Class C Ignition event like Offshore Class. 1. Bob Walter ...... 1260 "Jeep” -style tapered wing, and full-size bulkheads, help in enlarging the plans Possibly the real question that needs 2. Buck Z e h r...... 1249 to be answered is, can you legislate 3. Jim Buice...... 1113 for construction. In fact, it’s so pretty, 4. Dick Huang...... 1064 we’ll have to do it some day soon for equalized competition? Basically, I think 5. Chet Lanzo...... 1025 Model Builder. the second proposal would be an attempt to do that through restriction in state-of-the-art hull design. However, I don’t think it’s possible to equalize THE model boating by simply restricting the type of hull that can be allowed. Your Ed HEAD LOCK "NEW STANDARD" Fisher types would still hold a con­ siderable competitive edge over most III FOR GLOW PLUG others in the class. Guys like Ed are super at boat setup and driving ability. That’s a CONNECTORS difficult combination to beat under any CHECK THESE FEATURES circumstances. U S PAT. 472WJ2 I personally do not favor banning a I.Push, twist, its locked on. model just because it happens to be fast. J 2 75 2. Push, twist, its off. 3. Will not However, if sufficient numbers of at your favorite come off' even under heavy N.A.M.B.A. members feel the Sport 40 hobby dealer engine vibration. 4. Will not Class needs more stringent guidelines concerning hull types, it would certainly μ no, out,«. UJ.I. short out· 5. Positive spring be possible to exclude canard designs contact. 6. 30 inch lead wire. from the class. The canard design would MODEL PRODUCTS CORP. BOX 314 Pompton Plains, N .J.07444 still be a legal hydroplane design for open hydroplane classes. It w ill be 84 MODEL BUILDER THE F O X . 1 9 B B -R C * Exhaust Port can be rotated into any of four positions. ★ Swings an 8-4, 8-5 or a 9-4 size Prop.

Bor·: .650 Strok·: .600 Oitpl: .199 #22000 FOX . 19 BB-RC 589.95 #90266 Tilt-Down Mulfler 19.95 R.P.M.: 14,250 with 10-6 Prop #90267 Till-Up Mulfler 19 95 Fuol Consumption: .4 oz. minut· #50203 Engine Mount . 8.00 This beautiful new FOX .19 BB-RC engine starts easily by hand. That’s a nice and important feature. Large 11 mm. front main and rear main Ball Bearings to withstand the radial loads of electric starters and belt drive or spur gear systems for large props (or race car use). You can even choose your exhaust position. Loosen four machine screws and rotate the cylinder left, right or facing rearward for your cowling considerations. It delivers a really smooth idle and screaming performance when you want it. Expect more from this .19, it tears holes in the sky. Economical on fuel too! We think you'll like it. #30402 Gold Star Pt. S 2.75 #30403 Gold Star Qt 4.50 F O X FU E LS : #30405 Gold Star Gal 13.95

55 Gallon Urums of Fuel are available #30102 Superfuel Pt. $ 3.05 #30103 Superfuel Qt 5.05 Drums shipped Freight Collect #30105 Superfuel Gal. 16.75 - payment in advance. #30202 Duke’s Pt. $ 3.40 #30203 Duke s Qt. 5.60 GoldStar (Drum) $180.00 #30205 Duke’s Gal. 18.95 Duke's Fuel (Drum) 320.00 Missile Mist (Drum) 500.00 #30302 Missile Mist Pt. $ 4.20 #30303 Missile Mist Qt 7.60 5305 TOWSON AVE FORT SMITH, ARK 72901 Many Full Size Engine 3-Views are available on request for your designing convenience. #30305 Missile Mist Gal. 25.90

interesting to see if any rule changes are These types of fillers can set up quickly, spraying. Although some have accused forthcoming in the Sport 40 Class. so you’ll want to use a bit of speed when me of dipping my boats in a bucket. I’ve PAINTING A MODEL BOAT applying them. The automobile body never employed that technique. The There are a couple of schools of putty can cure within ten to fifteen only type of paint I apply with a brush is thought about painting model boats, minutes. I prefer the quick curing clear epoxy used to seal a wooden boat. especially model racing boats. The first material as it allows more time to work In most instances, spraying will result in group would contend that the main on the model without waiting around a smoother finish than brushing. It’s also purpose paint serves is to seal and for the filler to set. Care should be taken one heck of a lot faster to spray paint a protect the model from the elements when applying the filler material to not model. and stuff you spill on it. This purpose can apply more than is needed ortoget iton Not everyone has access to spraying be accomplished rather easily by just areas that don’t need filling. This material equipment. There are some spray cans slopping on some type of paint and really hardens, and extra sanding can be available that provide a fine paint for heading down to the pond. The second avoided by judicial application. These model usage. Pactra’s Formula U spray group would contend that the purpose materials can be sanded very smooth cans offer a variety of colors. I’ve seen of painting the model is to enhance the and make very nice fillers. some very nicely finished models using beauty of the model or attempt to When doing the initial sanding of a this product. Models powered by glow duplicate a realistic paint scheme. wooden model, I use fairly course engines will need a paint that is fuel- Depending on the model and what I’m sandpaper; 60 or 80 grit works well to proof. If spray cans are to be used, make attempting to accomplish, I subscribe to sand the filler material. Use of a sanding certain the material iscapable of resisting both positions. block is definitely recommended when the high nitro fuels used to power many In many cases, I’ll simply brush on a sanding a model boat. Be especially racing boats. coating of clear epoxy on a wooden boat careful when sanding edges that are I use a small airbrush to paint my to seal it so I can try the boat out. This wetted running surfaces. Such edges models. Depending on how much you approach is used extensively when I’m should not be rounded, but left sharp to want to spend, such devices can range developing a new design. Why bother sheer the water. Rounded edges on from around $25 to over $100. Unless spending a bunch of time and effort on running surfaces allow the water to cling one plans to really do some "trick” paint an untried model until it’s completely to the hull and increase contact surface, schemes, the less expensive models will "debugged?” Once the boat is running resulting in slower speed. suffice for most model painting pur­ roperly, it can be painted. Most folks Most fiberglass hulls require little poses. Some of the spray units can be owever, don’t bother with developing preparation prior to painting. One area operated by use of propellant cans. I new designs. Instead they purchase a kit. tha sometimes needs attention is the personally think these cans are rather In such cases, the builder will probably seam where the hull deck and bottom expensive if one plans to do much want to paint the boat prior to running. are joined. Automobile body putty or a painting. Small air compressors can be Unless, of course, he just can’t wait any polyester filler should be used to fill any purchased to provide the needed air longer to get the boat on the water. And gaps on a fiberglass hull. Care must be pressure to operate the airbrush. I that happens to me rather frequently. taken when removing excess filler from wouldn't recommend thattheindividual PREPARING THE BOAT FOR PAINTING a fiberglass hull using coarse sandpaper. just getting started in this hobby pur­ The two main materials used for If the fiberglass hull has a gelcoat finish, chase this equipment. If it appears that model boat construction are wood and the gelcoat can be scratched by the this is an activity you’re going to enjoy, fiberglass. Models built from wooden coarse sandpaper. It is recommended then consider this type of equipment kits will take more time to prepare for that fiberglass hulls be sanded with a 200 investment. painting than pre-built fiberglass grit or lighter sandpaper before painting. There are a number of brand names models. We’ll take a look at preparing This sanding w ill help assure better available to use in painting a model boat. wooden boats first. adhesion of the paint to the fiberglass Among those most popular are Hobby­ After the wooden boat has been surface. If the fiberglass surface is too poxy, K & B Super Poxy, and Formula U. completely assembled, it will be neces­ smooth,the paint will be unable to My personal preference is K & B Super sary to fill in all the pin holes, gaps, or achieve a good bonding. Poxy epoxy paints. The fast setting seams with some type of filler material. I APPLICATION TECHNIQUES characteristic of this paint is especially have had success using automotive body AND MATERIALS appreciated. I’m sure there are those putty as a filler material. Hobbypoxy also Painting is generally accomplished by who find other brands to be more to makes an excellent fiberglass filler. either brushing on the material or their liking. It might be like selecting a

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 or epoxyglass. Automotive spot and glazing putty . .λ ο Way to maintain nicads works super for filling in the small holes and cracks revealed by the primer. This ^ O N LY *19« material comes in tubes and is available at most stores carrying automotive paint supplies. Spot and glazing putty is fine SIMPLE CYCLER for filling small surface blemishes. It is Why pay for another charger when you already own one? Cycle your Rx. and Tx. not intended to be used to fill gaps and packs the easy way throughout the year. The SIMPLE CYCLER gives you an audible cracks. Use body putty for those warning when your packs are discharged to the level recommended by the manu­ situations. facturer. Then safely recharge with your radio system's charger. You can easily Use 200 or finer sandpaper when determine the percentage of power consumed and that remaining in your pack. sanding the primer coat. I usually sand Simple, safe, cheap. Connectors not included. »RED 22 just about all of the first primer coat off • See your local hobby shop · All products made in U S.A the boat. Use a tack rag to clean the boat _ _ _ · Send a S.A S.E. for full information after sanding the first primer coat and * τ » α Γ Π 4736 N. Milwaukee Ave. — Chicago. IL 60630 apply a second coat of primer. As this is IF UNAVAILABLE LOCALLY. ADD S1.00 FOR DIRECT ORDER. NO C.O.D. usually the final primer coat, I try not to load it on the boat too heavily. Fine grade sandpaper is used to smooth this primer coat. If more holes, cracks, or “She’s surprisingly easy to handle . . . and * gaps are still visible, repeat the priming process until the imperfections are she can really get up and go ' corrected. This is really the most crucial part of the finishing process. The finish­ ing colors will not cover up hull blemishes. If you don’t have the preparation process done properly, the final painting is only going to accentuate this lack of effort. Primer is also an excellent material to use when learning how to operate a spray gun or airbrush. If you do get runs with primer, they can be easily removed. APPLYING THE FINAL COLORS S p o r t s t e r Before launching into a discussion of applying the final colors, let’s consider WING SPAN: 56" LENGTH: 39- COVERITE the actual color or colors to be used. I WEIGHT: 5-6 LBS. POWER: .40 420 B AB Y LO N RD. HO RSHAM , PA. 19044 sometimes think model boaters forget favorite type of beer. If it's something colored paint is applied. As mentioned that their boats need to be seen by you like, you don’t need to spend lots of earlier, I suggest painting wooden boats others. This is especially true of model time justifying your preference. I would with clear epoxy paint to seal the boat. It racing boats that occasionally stop or flip encourage the new model boater to try isn't necessary to do so with a fiberglass during the course of a competitive the different brands available for finish­ hull. event. A model racing boat that stops ing a model boat. They all work well. It I have used a couple of different types during a race becomes a hazzard. There becomes a matter of finding the one that of primer and the one I prefer is K & B are some colors, like black, dark blue, you can make work the best for your Super Poxy white primer. This primer and dark green, that are extremely own particular needs. dries quickly and can be sanded easily. I difficult to see on the water. Just painting the boat a bright color will not guarantee THE PRIMING PROCESS spray the primer on good and heavy and it’s safety upon the water, however, it This particular step may be the most don’t worry about any runs that might doesn't hurt to have a boat that has a important phase of preparing the hull appear. The primer sands so easily that high degree of visibility when it becomes for final paint application. I cannot runs can be taken care of with ease. It's an object to be avoided. imagine attempting todo a final painting amazing how many blemishes appear I’ve been asked how I learned to paint without first priming the boat. I say this after the boat has been paintea with model boats. The answer is fairly simple. because many pinholes and small cracks primer. This is especially trueforwooden You tend to achieve some degree of go undetected until some type of boats and boats made of clear fiberglass proficiency with those things you do frequently. I’ve painted my share of model boats. Reading about how to paint a model boat is not going to make MOVING TO SOUTHERN CALIFORNIA? you proficient in this task. It should be mentioned that I’ve also screwed up MAKE SURE YOU GET A HOME my share of paint jobs. WITH A MODEL WORKSHOP ! ! I know the reason behind most of the paint jobs I’ve messed up. It's called FOR ALL YOUR REAL ESTA TE NEEDS, impatience. When I load my airbrush I CONTACT: want to get the job done as quickly as ANITA NORTHROP possible. It’s getting in too big a hurry that causes most of my problems when painting. MLS The biggest problem for me and NORTHROP probably for many others is trying to put on too much paint at one time. The end Real Estate Inc. result of this is usually a big sag or run in the paint. It’s impatience that causes this 621 West 19th St., Costa Mesa, California 92627 (714)642-5062 to occur. The sage advice here is, “ Slow down and do it right the first time.”

86 MODEL BUILDER I’m not going to discuss painting with a brush since I don’t use that method. I Η I J I N K S will share a couple of thoughts about The Ultimate In Sailplane using a spray gun or airbrush as I do have Performance some experience with this method. FAI-F3B - Thermal and Slope Using an airbrush is notallthat difficult . EPOXY-GLASS FUSE * FOAM WING to master. It’s quite a simple tool actually. * 3 CHANNEL RADIO REOUIRED Before attempting to squirt paint on Wing Span 99 5: Area: 813 sq in.; Coupled Aileron and Rudder your model boat, get a feel for the Elevator; Speed Brakes: equipment. Read the instructions on the Special LD 985T95I-C Airfoil for paint to see how much the paint should Superb Penetration and L-D

be thinned for proper spraying applica­ INTRO e λ μ μ Calif. Residents add tion. Practice spraying some smooth PRICE 1 Z D . 6% Sales tax > surfaces. I use the metal and plastic trash Direct Order Only cans I have in my workshop to adjust my airbrush. An important thing to LUTMl ENTERPRISES remember when using an airbrush is to "When we soar, others hurt" move the gun across the surface you are painting. Do not stop the spraying P.O.Box 1697 San Luis Obispo. Calif. 93406 RiöÄ^DiiyRiö DO motion as this causes the paint to build up in one area and runs can result. With afraid to ask the owner how it was Everything an engine should be. a little practice you will be able to accomplished. A beautifully finished Smooth, powerful, easy starting, develop a smooth motion that will result model shows pride of ownership and light and reliable. Backed by in good coverage. Start the spraying at very few modelers are hesitant to tell Homelites I year limited warranty. the ends of the model, not in the middle. you how they achieved that beautiful Engines come complete with Have the spray coming out of the air­ finish. With practice and time, you too mount, choke. Tatone muffler and brush as the airbrush approaches the can learn how to finish a model that precision 6 bolt hub. model. Don't stop spraying until you brings praise and compliments. · Nothing comes close. have swept past the model. When you are done, clean your equipment thoroughly. R/C Auto . . . . Continued from page 45 APPLY THE BASE COLOR FIRST If the boat is only to be painted one he notices that my boy, Joshua, is color then that’s the base color. How­ working his way down the line of peo­ ever, if the boat is to be painted more ple, asking for quarters. Dick wandered than one color, it is a good idea to paint off to ask him what he was doing, turned SPECIFICATIONS: 2.5 cu. in. the entire boat the lightest shade you out that Josh had lost his comb and was Engine weight 4 lb. 6 oz. plan to use. As an example, most of my trying to round up enough money to Solid state ignition boats are painted red, white, and blue. buy a new one before I found out about Roller bearing at flywheel Patriotic, huh? I think they're pretty it. The kid was only 7 at the time so Ball bearing at rear colors. White is the lightest color, and I begging from strangers was forgiven. Hemi-head chamber And we spent what he had collected on Schneurle ported paint my boats white as the base color. 2 pc. con rod— bearings The white base also makes the red and beer, so it had all worked out. Chrome plated cylinder blue brighter in hue. I have always had Only a very few of you reading this Magnesium case better luck painting dark colors over ever raced the 1/12 scale Gas cars, Balanced crank light colors than the other way around. powered by Cox reed-valve and rotary- Pyramid reed intake valve (TDs) 049 motors, and should Built-in choke Once the base color is applied, we get to nn Height: 7.25" the fun part. probably be thanking your lucky stars $279.00 retail Width: Shaft center to TAPING AND MASKING for that, although we used to have some widest point 3.0" I occasionally paint boats for others great times here locally racing the Total Width: 5.25" for a fee. I charge according to how things. Anyway, the engines ran hot. I Mounting plate to prop: 6.0’ much I have to do. As soon as I have to mean, real hot. To give you an idea of See it at your local hobby shop. start masking and taping for color just how hot they ran, one time Don separations, the price goes up dramati­ McKay was corner marshalling and a car He'll order it if not in stock. cally. It takes time to mask and tape a got stuck on the boards right in front of CONTEMPO HOBBY PRODUCTS model, but the results can be well worth him. Of course the thing died on idle, 11611 CANTARA ST. · NORTH HOLLYWOOD. the time and effort. but Don picks the car up, flips the CA 91605 When it comes to taping the lines for flywheel with his thumb and the sucker ^^^Ajjivisionj)f^Contempo^ntemnses^^^ the color separations, a product that I’ve started right up . . . No glow clip or found to be excellent is Flex-Mask. It battery, remember. The racer whose car told the “ racing secrets” ! Word of this comes in 1/4 inch wide rolls and bends it was had already gotten down from the got back to us, of course, which made us easily around tight corners. Regular driver’s stand and was in his pit area, work all the harder to get competitive. masking tape can then be applied over finally Don got his attention ana the guy And ever since, just because it is my the Flex-Tape, leaving a slight amount of finished the race. Hey, I saw it happen nature and to show them up for the fools Flex-Tape exposed. If quite a large area and still find it very difficult to believe. they were, have gone out of my way to needs to be covered, butcher paper can One story that may not be a real tell every racer every trick in the book. be used to protect this area. Tape the yukker is still one that I like to te ll.. .Just The racing got better and today we paper to the masking tape. Newspaper to get even, I suppose. When several of enjoy really good, clean races still, partly shouldn’t be used for covering such us started racing 1/12 Gas cars, which as a result of these ducks quacking about areas because the newsprint can rub off were quite popular around here for a the “ new guys" being told all of the on the base color and leave a mess. This number of years, a very few people, Don secrets. is especially true if the base color is white McKay included, would always be giving A FACTORY DRIVER or yellow. Two inch wide masking tape us hints on how to make the cars more IS HEARD FROM... can be used to cover areas from reliable and to handle better. A larger Here is something that I really am overspray. group of established racers, with at least hesitant to use as it is one of those letters If you see a boat whose paint job is one National Champ in their midst, where I got a copy and not the original. especially pleasing to you, don’t be actually got mad because we were being That usually means copies were sent to NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 87 to weed out the few (who are easily in M A R K V I the minority, by the way) who always seem to be causing the problems. More COVERUP! HAND DRILL/WINDER accurately, the factories need to look at their drivers and see who is doing them Sturdy, high quality, rich dark some good in the long run, and then to green vinyl-covered binders for rid themselves of the ones who only your valued copies of MODEL give them a bad name in exchange for a BUILDER Magazine. Gold let­ win or two. tering on spine and front cover. At the risk of appearing to place myself on high as a shining example »HEAVY DIE-CAST NYLON CASE (which I am not), my attitude in racing »METAL GEARS is, all that matters is a good race. The »ADJUSTABLE GEAR TOLERANCE fight can be for fourth place in the "C” »BALL THRUST BEARING ON SPINDLE main, but so what as long as it is a good Catalog - $1.00 race? Toward that end, and for reasons JIM CROCKET REPLICAS already mentioned earlier, I have never P.O. BOX 12600 had a secret trick up my sleeve, in fact will go out of my way to make new FRESNO. CA 93778 techniques known to all in our club. When 1/12 electric started to get hot is based on situations synonymous to the around here, I was the first with an two I'm about to relate. Associated RC12E, was winning most "The first deals with a factory driver of the races and not because I am a fast getting caught practicing on the track racer, which I’m not, but because I had after it was closed by the race director the best car. There were racers in our until the next day. The track closure was club who mumbled about my car hav­ obviously so no one would have an ing a trick motor in it; we ran Stock advantage. Getting caught was naturally class and use of Stock motors was One B in de r...... $5.95 grounds for disqualification. The race assumed but not enforced with a tear- Three Binders . . . $15.95 director then chose to have the drivers down procedure. Man, I had the same Five Binders .... $25.95 vote as to whether or not the driver in motor in the car that came with it. It question would be disqualified. This hadn’t even been opened up and these (For more than 5, include action was in my eyes, questionable at guys evidently weren't able to see that I S5.00 fo r each additional best. Without disclosing the driver’s was beating them in the corners, not on binder.) name, a vote was taken. The majority the straights. Finally, two of these same voted to let him race. As it turned out he racers had to use a real cheater motor Shipping: Binders shipped in U.S. won the main event. to beat me, an act for which they still by UPS only. For one binder, add "The second incident was when the owe me an apology. But what is the $200. For each additional binder, officials had decided to put nine cars in point in winning, or even in racing, if add 75

88 MODEL BUILDER WILSHIRE MODEL CENTER CARRERA u.s. $ PRICE WANITSCHEK ASW17 - 2 Ch. 87" řoam/balsa ARF .149 95 Bonnie (Delta) Flying Wing 79" 2 Ch...... 135 00 Favorite 2 Ch. 90" foam/balsa ARF...... 159.95 Ornith 4 Ch. foam/balsa 140" ARF...... 350.00 Favorite (ribs) 103" 2 Ch...... 105.00 Jantar 4 Ch foam/balsa 110" A R F...... 350.00 Nimbus - 2 Ch. foam Balsa 118" ARF...... 169.95 ASW19 3 Ch foam/balsa 108" ARF...... To be announced Sagitta · 3 Ch. foam balsa 87" ARF ...... 225.00 ROEBERS ASW17 - 2 Ch. ribs 1 2 6 " ...... 158.00 Cobus 2 Ch foam/balsa ARF 79" ARF...... 149.95 S B. 10 foam/balsa 2 Ch. 126" ARF ...... 225.00 RL II foam/balsa 2 Ch. 118" ARF...... 159.95 S.B. 10 foam/balsa (cut out) 2 Ch. ARF...... 225.00 RL III foam/balsa 3 Ch 100" A R F...... 179.95 S.B. 10 foam/balsa 3 Ch 126" ARF...... 235.00 Twin Astir 4 Ch. foam/balsa 140" ARF...... 285.00 Kestrel foam/balsa 4 Ch. ARF 1 5 0 "...... 299.95 Shark 4 Ch. electric, foam/balsa 100" .215.00 Mistral foam/balsa 5 Ch. ARF 178"...... 398.00 S.B. 10 foam/balsa 4 Ch. ARF 1 92 "...... 349.95 IBA/READY TO FLY Primus ribs (electric) 3 Ch. 1 0 3 "...... 84,95 PB20 St. all balsa 3 Ch. 8 2 " ...... 185.00 Lift #1001 foam/balsa 2 Ch. 99" ARF...... 140.00 PB26 DV special electirc 102" ...... 259.95 Lift #1002 foam/balsa 3 Ch. 80" ARF ...... 149.95 EPPLER PROFILE BOOKS (In German) Trlco #2002 foam/balsa 3 Ch 80" ARF...... 195.00 Eppler MTB I ...... 6.95 Trico #2001 foam/balsa 2 Ch. 99" ARF...... 134.95 Eppler MTB I I ...... 6.95 Loft foam/2 Ch. 79” ARF...... 99.95 NACA MTB I I I ...... 6 95 Draco #3001 foam/balsa 2 Ch. 126" A R F ...... 184.95 FRANZ PERSEKE (In German) Draco #3002 foam/balsa 3 Ch. 110" ARF...... 260.00 "Das Segelflugmodell” Vol. I & II each...... 16.95 Draco #3003 (ribs) 4 Ch. 138"...... 164.95 ASW19 foam 2 Ch. ARF 87"...... 99.95 SPOILERS Graupner #93 per pr...... 13.95 MULTIPLEX Wanitschek #5019 per pr...... 35.00 Akro foam/obechl 3 Ch. 71" ARF...... 169.95 Multiplex #2640 250mm 9.75" per pr...... 21.95 KÁRO AS 3 Ch. all fiberglass 79" ARF ...... 259.95 Multiplex #2641 350mm 13.75" per pr ...... 26 95 Alpina 4 Ch foam/obechi 160” ARF...... 265.00 Carrera #92326 per pr...... 19.95 Flamingo ribs/3 Ch. 100” ...... 139.95 Carrera #92325 per pr 1995 Fiesta ribs/4 Ch. 128” ...... 159.95 Carrera #92329 per pr...... 18.95 EISMANN Carrera #92330 per pr...... 25.95 Focus foam/balsa 3 Ch. 100" ARF...... 275.00 INSTRUMENTS Camaro foam/balsa 4 Ch. speed b ra k e ...... 295.00 Wanitschek #5080...... 9 95 Ampere / electric / same as above 110"...... 299.95 Wanitschek #5081...... 7.95 Hai / foam/balsa 3 Ch. 82" A R F...... 220.00 Candy foam/balsa 2 Ch. 39" ARF...... 145.00 RETRACT WHEEL Pik 20 foam/balsa 4 Ch. 160" ARF . 525.00 Wanitschek #5003 ...... 42.50 KURT KROEGER ROLF WERNER KA6 foam/balsa 4 Ch. 144" ARF...... 395.00 SB11 · all fiberglass 206" RTF...... To be announced Samun · all fiberglass 98" RTF...... To be announced BAUMANN Wisper all fiberglass 99" RTF...... 395.00 GUNTHER ISENSEE "Das Ding’VAileron Torsion Bar 38" per pr...... 9.95 GEIST Hot Dog 3 Ch. electric foam/balsa 50"...... 173.95 CATALOGS Hot River 3 Ch. electric foam/balsa 104" . __ 220.00 Carrera - 216 pages - 1981 The last they will print (in German)...... 10.00 Order direct from: Geist (in English) electric systems...... i oo WILSHIRE MODEL CENTER Hours: Mon. - Fri. 10 - 5:30. Sat. 10 -5. Closed Sunday Χ Τ ί Ζ Ι Γ 3006 Wilshire Boulevard Santa Monica, California 90403 Phone: (213) 828-9362 Visa and M aster Charge accepted car, I could have moved up a couple of checked full length for nicks and kinks; only for storage; I prefer to actually fly positions, possibly even won the race any bad spots at all relegate them to the with lines that are clean and dry, no oil at in question. But such thinking is stupid, status of "borrowers lines,” to pass out all on them as the oil tends to attract as every year I look back and see all of to those who never seem to come to dust. At the most, I will wipe a set of lines the really close, exciting races I have contests prepared. The lines in perfect down with a very light oil at the start of a had, even if most of the fights to the condition are wiped down with a rag day’s flying, frequently wiping them finish weren’t for first and second. soaked in WD-40. This product is mostly down with a dry rag just to be sure they Think about it, racers, as we aren’t solvent, which is why it penetrates so are clean. In no case are lines directly talking about just sponsored racers well, the solvent cleans the lines, yet out of winter storage used for flying here. Every driver putting his caron the there is also a light oiling action to without another cleaning. track knows something that can help prevent corrosion. Lines are too impor­ Any rechargeable batteries need a somebody else. If we all spread the tant to use any that are at all bad and too general cleaning as well as once-a- knowledge around there will be more cheap to justify cutting corners. Remem­ month charging during the winter. With winners and much better racing. · ber that when sorting your flying lines NiCd batteries there isn’t much to do from the borrower’s lines. And come except to charge them. Wet-cell bat­ flying season, it is necessary to again teries should be checked for fuel level C/L ...... Continued from page 59 clean the lines, as the wipe with WD-40 is and topped if necessary. Store any photo-processing chemicals fresh, in his fuel cans to avoid storing fuel in small containers. This gas (a “ gas” like air, not Schlueter Free the liquid kind) just sorta floats on top of whatever it sees as the bottom of the Flight Models can, whether it is the upper level of the 3 fuel or the actual bottom of the can, p r e s e n t s n e w forming a barrier between the fuel and air. Interesting trick, one that I have "PACIFIC ACE” v\, never tried. partial kits.^coN- Flying handles get the once-over TAIN PRINTED WOOD AND COMPUTER around here; they are generally very DRAWN PLANS) reliable although wires can fray and plastic parts wear. The flying lines are KIT NO. Ö PRICE what need a very close look, the only PA-40—NEW 40 " SPAN VERSION-ALSO FLIES GREAT ON .020 GAS. $6.65 way to do it properly is to string them PA-30 "OLD TIMER" 30” SPAN-A GREAT P-30 CONTENDER. $4.70 PA-20 "O LD TIMER" 20" SPAN-SCHOOLYARD FLYINGATIT'S BEST $3.25 out. I place sawhorses out in the street EXTRA PRINTED WOOD PER SET: PA-40, $ 3.90; PA-30,$2.60; PA-20,$1.45 and string the lines between them, UP TO THREE KITS. ADD $2.00 POSTAGE CA RESIDENTS ADD 6% TAX. clamped at both ends to keep them off 3508 POINSETTIA AVE, MANHATTAN BEACH, CALIFORNIA. 9 0 2 6 6 the ground. One at a time they are

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 89 the piston and the squish band on the Eliminates GLITCH problems associated with long servo leads. head. By carefully holding the solder in position arid then turning the engine • Eliminates need lor voltage robbing chokes and other devices with over, the piston will mash the solder flat leads over 15" long against the squish band area of the head. • Modern CMOS 1C technology With this done, it is an easy thing to pull • Uses less than 0.5 milliamps at 4.8 volts the solder back out of the motor and STOP • Power lines are capacitor filtered then to mike it. The thickness of the Available in 4 versions with connector installed: mashed end of the solder is your head Single Channel, single servo drive (Single) GS clearance, although I suspect that there Single Channel, two servo drive (Wye) GS-1Y is a tolerance here of a thou or so. No $14.95- Two Channel, two independent servo drive (Twin) GS-2 matter, what you want are consistent EMS $17.95- Two Channel, two servos per channel drive (Twin Wye) GS-2Y results; always use the same solder to • Overall lead length is approximately 6" to 8 " measure clearance, write down the ______* Modeler must furnish own longer extensions as required. clearance and refer to these notes when performance comparisons are made. It's S pecify R adio §1.00 Shippingand Handling on Pre-Paid orders, add 6% for California residents. Mastercharge and Visa. a neat trick, easy to do, repeatable, the 6175 PALO ALTO DR„ ANAHEIM, CALIF. 92807 (714) 637-2161 tools don’t cost much, and you don't have to tear the engine down just to check the clearance. ·

Make Glow Ä Diesel F/F Scale___ Continued from page 57 SACHS now®5 FIGHT INFLATION! Converts in minutes—no special tools required. drive us to a Chinese restaurant for a FROM GERMANY .... .049 swings 7-3 @ 13,000-OS .90 20-6 @ 6.500 sensational meal. Then over to Ned WHERE QUALITY COUNTS Send 404 & SASE for literature. Kragnes for more talk about airplanes Davis Diesel, Box 141, Milford, CT 06460 big and small. Ned was the first man to Call after 6:00 p.m.: (203) 877-1670 fly a jet (the Bell P-59, I believe) in this FROM MODELERS TO THOSE country. Needless to say, he had lots of WHO CHASE FREE FLIGHTS! was a bit of bother, more than most great stories to recount, and many wanted to go to, but if interested in max beautiful scale models for us to view. performance from your engine, you The next morning we stumbled out of $399.95 F.O.B. RENO, NV. really should be able to set it or at least bed and headed for Dulles Airport, and (As long as the supply lasts!) determine what is stock and then be the trip home. If it sounds as though we able to proceed from there if the engine were busy every minute of our trip, doesn't hum the way it should, or seems W loped Jactozy you’re right! We packed a lifetime in a to be hard on plugs. The neatest way I week, and enjoyed every minute of it. have ever come across to do this is now 932 MOANA WEST SHOPPING CENTER I’m already looking forward to 1984! · RENO, NV 89509 ( 702) 827-2603 making the rounds of the RC car racers, and the trick is to simply stick a short batteries in a warm,dry placeand do not length of 1/32 diameter resin core solder Stability...... Continued from page 47 forget to charge them once in awhile, a in the plug hole, rotate the prop shaft a statement I repeat, as it is easy to forget, couple of times (by hand, of course!), dihedral angle, the two wings meet the and it really is important to keep them pull the solder out and using a micro­ air at different angles of attack. Fin charged up. Dry cell batteries can also meter, measure the squeezed down end deflection can be regarded as aileron be stored, but by the time you go flying to read the head clearance. deflection plus sideslipping by the again, will no doubt be pretty weak. It is real late at night as I write this; fuselage, and the latter has relatively Figure out a good use for them, one that possibly that wasn’t too clear first time small effect. Thus, whereas aileron does not involve the heating of glow through. So we’ll try again. A short deflection causes a rolling torque direct­ plugs, as the normal 1-1/2 volt dry cell length of the solder is bent so as to have ly, fin deflection makes the model crab isn't too good at doing that job, even an “ L” shaped leg on one end, this “ L” when in the best of condition. through the air, and the crabbing makes should be just long enough to reach the model's dihedral apply a rolling WHAT’S THE HEAD CLEARANCE? from the glow plug hole to the side of torque. At high speed, especially when A simple question that not everybody the cylinder. The length of solder is the model flies steeply upward or down­ can answer properly, can you? Used to inserted in the plug hole, positioning it ward, the force of gravity may be much be that just setting the head clearance so that the “ L” end is between the top of smaller than the aerodynamic forces on the model, and the rolling torque will produce continuous rolling. In the ^ ) glide, thanks to gravity, the bank pro­ 0^ JOHN POND q duced by rolling causes sideslip, and the sideslip acts via the model's dihedral to generate a contrary rolling toque that Old Time Plan Service arrests the rolling at an equilibrium The largest selection of plans in the world at the most angle of bank. The sideslip causes a side reasonable prices. Each list $1.00 force on the fin, which makes the model All 4 for $3.00 circle. No. 12 OLD TIMER F/F GAS The common cure for spiral diving in the normal regime is to have the rolling No. 12 OLD TIMER RUBBER/TOWLINE torque proportional to g load rather No. 12 OLD TIMER FLYING SCALE A through K than (speed)2, so that when the pull-up is No. 12 OLD TIMER FLYING SCALE L through Z sluggish in the normal regime, the New plans prices effective Oct. I , 1981 rolling torque is correspondingly re­ P O. Box 3215 duced. Ways of doing this are wingtip weight, wings of unequal length, and San Jose, Calif. 95156 stabilizer tilt. The first two generate Phone (408) 292 3382 rolling torque by displacing the c.g.

90 MODEL BUILDER laterally from the center of lift. The last makes the airplane crab toward the low end of the stablizer, and the model's dihedral generates rolling torque. IMPLICATIONS OF SUPERSTABILITY NEW REALISM! FOR MODELLING NEW PILOTS FOR A MORE "Modelling" here means using a model to predict the behavior of a larger NATURAL APPEARANCE airplane. Making a model smaller is known to reduce its lift/drag ratio. It will FEATURES: probably also increase its stability, so it 2 " SCALE (2 s/e " HIGH) will fly with its balance both farther SEPARATE GOGGLES forward, and farther aft than will its OR SUN GLASSES larger counterpart. This could lead to DEEP TORSO sinister forms of overoptimism. EASILY ASSEMBLED REFERENCES Abbott, I.H., and von Doenhoff, A.E. EASILY PAINTED (1958). Theory of wing sections. Dover, INSTRUCTIONS New York. pp. 458 and 550. STANDARD SHOW SIMPLE SPORTSMAN Althaus, D. (1980). Profilpolaren fur ACTUATING SYSTEM der Modellflug. Neckar-Verlag. ViI- Separate head permits tilting, turning or actuation with your model air­ lingen-Schwenningen, Federal Re­ public of Germany. Pages 102-109. craft, boat or car control system. Ask for these pilots at your dealer. If Lanchester, F.W. (1910). Aerodonetics. he will not supply, order directly from the factory. Constable, London, p 4. SCALE WHEELS · ENGINE KITS · DISPLAY MODEL KITS McCulloch, G.B., and Gault, D.E. MACHINE GUN KITS · ACCESSORIES (1951). Examples of three representative SEND $ t FOR COMPLETE CATALOG DEPT. MB m o l iwc types of airfoil section stall at low speed. 181 PAWNEE ST . SAN MARCOS, CALIFORNIA · 92069 NACA Technical Note 2502. Schmitz, F.W. (1942). Aerodynamik des Flugmodells. C.J.E. Volkmann Nachf. E. Wette, Berlin. In the second edition, published by Karl Lange Verlag, Duis- 6th Las Vegas berg in 1952, data have been added to Figs. 3,41,43,52,58, and 60, while Figs. 4, Annual October 8, 13, 15, 16, 20, and 78 have been Fly-In 28 to 31 redone. The third edition, (Karl Lange, INTERNATIONAL 1957) has been further corrected. The first edition is available in English trans­ lation from the National Technical Information Service, Springfield, VA 22151 as index number N70-39001. All the figures have been redrawn in the translation. ·

Peanut...... Continued from page 49 little extra on the interplanes for trim. Notch out the fuselage sneeting to allow them to mate to the longerons with the tip of a sharp No. 11 blade. When these cement joints are about set, glue on the top wing, adjusting everything into alignment. Slide in the lower wing and recheck alignment. FLY-IN WILL BE DEDICATED TO THE The canopy will only look right if U.S. AIR FORCE THUNDERBIRD DEMONSTRATION SQUADRON vacu-formeo. Mask off and color with yellow enamel to match your tissue. Side windows are outlined with narrow strips ★ Four Big Days Of Fun And Enjoyment of plastic tape painted yellow and black. ★ Headquarters — Showboat Hotel The cabin fresh-air scoop is made sepa­ ★ Static Display rately. Don't forget to put in a 5/16 scale ★ New Flying Site, El Dorado Dry Lake pilot and build up the overturn structure ★ Banquet — Saturday Evening from slivers of bamboo painted gray ★ Tables, Available To Manufacturers before mounting the canopy. ★ All Aircraft Quarter Scale Or Larger The exhaust stacks must be lightweight ★ Pre Entry Only, Deadline September 27, 1982 and they are huge. Try this. Carve and ★ Limited To First 200 Aircraft sand a crescent-shaped piece of foam FOR DETAILED INFORMATION, SEND A LONG. long enough for both stacks and slightly "jjv Headquarters under-diameter. Spiral-wrap with five or STAMPED SELF ADDRESSED ENVELOPE TO: six layers of 1/8 inch wide tissue strips Pat Bunker. Q.S.A.A. Sec. held down with white glue. When set, 6532 Bourbon Way SHOWBOAT H otel. Casino O Lanes sand the "papier mache," coat with Las Vegas. Nevada 89107 • f HIIMOftt lAJ VtCAS NEVADA IttX more white glue and cut off to the (702) 870-6076 proper lengths. Drop a little acetone on the foam core to dissolve, swab out the goo, and presto . . . light, realistic stacks NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 91 If you really want to build this Peanut 1939-1941 GAS MODEL and just can't figure a way to make the canopy, I’m willing to sacrifice one of my CLASS A, 46" SPAN (SAM approved FF/RC) apparently irreplaceable Mattel plastic sheets. Send me a buck to 5604 Cedar- B $11.95 ■ $21.50 wood Street, Farmington, NM 87401, CLASS C, 72" SPAN (SAM approved FF/RC) and I’ll make you one. ·

B $14.95 ■ $27.95 Cessna...... Continued from page 54 80" R/C ASSIST (SAM approved R/C only) time for the '80 FAC Nats, it took B $19.50 ■ $36.95 another two months of fooling around to trim her out, including the construc­ tion of two enlarged tails. But by the Fall a PARTIAL KIT: Plans, Ribs, Wing & Empennage Tips. of 1980, it was flying well enough to ■ FULL KIT: Partial Kit PLUS all Plywood, Wire, Sheet & Stripwood required. capture the Thompson Trophy at our Covering & Cements not included. Fall meet, a feat that was repeated in LEHMBERG ENTERPRISES, 2646 BOLKER PR.. PORT HUENEME, CA 93041______(0.05) 984-6639 1981. This model is not for the inexperi­ enced or the faint-hearted. It required a great deal of patient trimming, and, for ATTENTION Va SCALERS reasons bordering on the supernatural, 82 NATS! has shown a fondness for landing in EPOXY GLASS COWLS FOR trees . . . very high trees at that . . . but HOSE* PICA SID MORGAN BAlSA USA PlATT CONCEPT QUARTER MIDGET. fLEET HOSTETLER PCM T CRAFT SHE BER PIT7S '/, ft '/$ with those two trophies now on the SCALE SUPER CUB FOKKER D 7 BOEING P 12 P-26 F4B2 F4B4 SPARROW HAWK GEE BEE MOO Y MACBRlENS shelf, I have forgiven her these eccen­ THE NELSON. 15 TURBULENT CHRISTEN EAGLE BR/SlGHELLA S STARDUSTER tricities. Perhaps my accumulated // V, SCALE J3BI BABY FlYBABY AIRCAMPER PILOT JUNGMANN I 3 5 SCALE & OTHERS experience will make things easier for 1s t ! . 0 t h ! . & you. WHEEL PANTS FOR: ClTABRlA STARDUSTER II. PITTS SKYBOLT LIBERTY SPORT Building the Model For complete brochure on this CHRISTEN EAGLE P 6 E HAWK STEARMAN STINSON SR 9 Fuselage: This is constructed using the great engine, & other quality MULLIGAN it OTHERS competition products, familiar half-shell technique. Although send 50 cents to: BRAZED b HEAT-TREATED WIRE GEARS & CA BANES most of the stringers are 1/16 square, the LARGE SCALE PLANS AVAILABLE upper “ backbone" and top-and-side KUSTOM KRAFTSMANSHIP Send SASE tor latest list stringers are 3/32 square stock. All of the Box 2699 Laguna Hills CA 92653 We supply Modelers with fiberglass parts for your stringers, as well as the 1/16 sheet Call: (714) 830-5162 plans— W rite or call us: bottom keel, should be stripped or cut T ft D FIBERGLASS SPECIALTIES from firm balsa. Only the general loca­ Dealer inquiries invited 30925 BLOCK GARDiN CITY M l«8'35 PHONE (313) 421-6358 tions of the stringers are indicated on the former patterns, because a neater Paint flat black inside and out. spinner. Install a 12-inch loop of 3/32- job will be achieved by notching the The three-bladed prop lets the dia­ inch rubber and check the balance. formers as you go along. Note that meter be small enough for take-offs. The rigging, for a biplane, is relatively Former 3 is doubled and cross-lami­ Plywood makes tougher blades than simple. I use two-pound nylon mono­ nated. A 3/32 square wing rail is added balsa for about the same weight. Form a filament on a small needle, pushed to the completed fuselage between little twist in them by soaking and through at the proper points. Fasten Formers 3 and 6. The wing rail may be strapping to a two-inch can or bottle at with a small dab of thinned Ambroid on tapered if you wish to build in some 15-degree forward skew. Use small a pointed stick after all slack is pulled. wing incidence. amounts of epoxy to hold the parts Not necessary structurally, but it looks The cowling is of composite construc­ together and blend the hubs to the good. tion. It is best made as a separate unit blades by sanding with an emery board The scale trim tabs are right for flight and then glued to the fuselage after both to achieve static balance. Pitches in the adjustments. Bring your small brush and have been finished. Begin by making a range of 1.7 to 2 times prop diameter a little acetone to your test-flying ses­ drum-like structure with 3/32 square seem to work best for my light, under­ sion. Soften the cement on the proper stringers, top and sides, and 1/16 square powered models. Bend the .020 wire side of them to set needed adjustments. stringers between, from Former 1 to 2. shaft over and epoxy to one of the Mine flew naturally in wide right circles, The front of the cowling is made up of toothpick hubs before cementing on the which is best for biplanes. several circles of 1/8 balsa, cross-lami­ nated, the last few of which make up the dummy cylinders and crankcase; the DICK HANSON MODELS nosebutton is an integral part of the Our Flying Hippo 825 is pretty light on his feet.We latter structure (see photos for the have supplied a number of these to active competition details.) I found it necessary to incor­ fliers.internationally as well as here in the U.S.A. porate a rubber band noseblock hold­ The new 750 sq. inch Tipo also gets around. According down in order to insure that the prop to the feedback we recieve.both types are doing assembly would not slip out at an inop­ extremely well at local,regional and national contests. portune moment during a race. Custom built airframes of these and other winning The “ drum” is covered with stiff designs is still our main business but we are adding paper, after which the front of the cowling is sanded to the correct contour. kits this year of the Tipo's and two new designs— The rocker arm blisters are tedious to The Formula 750 and the "Cheep Trick',' A 625 sq. make from scrap, but are authentic and a inch rear exhaust 40-46 Bird. nice touch besides. The completed If we can help you too-Call or write- cowling was given several coats of DICK HANSON MODELS sanding sealer and sanded with 400 grit "Hippo" Tee shirt with each order shipped 5269 LUCK γ CL0VER LANE paper between coats before being Phone: (801) 261-1402 MURRAY, UTAH 84107 painted. The cowling has never been damaged, even when the model has 92 MODEL BUILDER dived straight in. Tail surfaces: These are quite straight­ RUBBER STRIP forward. In order to keep the tail sur­ ENDURANCE RUBBER MODELS faces reasonably light, I used 1/16 inch FAI RUBBER. Made in U.S.A. THE EASY B" THE TIME MACHINE" PENNY stock for both the sheet outlines and the SIZES: 7/4". 3/16", 1/8" 3/32", supporting members. Consult the plan 1/16", by 1mm thick(.042"). to distinguish between 3/32 x 1/16 BOXED 16 ounces of rubber per box. components and those that are simply PRICE: $ 12 50 per box, ppd in U.S.A. 1/16 square. When the fin-and-rudder structure has been assembled, use scrap PIRELLI 3mm o n ly : $18.00ppd to build up the lower portion so that it KSB TIMERS conforms to the fuselage contours. The tail surfaces are made in such a way that a FUEL SHUTOFF 30 SEC. $11.95 generous stab slot remains for adjust­ 6 M IN . D T THE SLOWPOKE Scan ts ment purposes. After trimming, the slot $1 1.95 can be tissued over. SEND SMFOR 1982/83 CATALOG Wing: The trailing edge is made from p s F. A.I. M odel Supply Weight 2 Penny*Pen Q_ two lengths of 1/16 square stock lami­ • P O lalá tllAttic O P rolf p • ‘•■»a nated together with thinned white glue. P O BOX 3957 TORRANCE. CA 90510 A similar procedure may be followed for STARSHIP the leading edge, using two 1/16 x 1/4 semifinals, Ed was launching off Gary 2 Yard Birds 12 • Full Size Plans Plastic • Full Size Prop Jig pieces, even though I had used a cut Ittner’s hot FAI winch, which he pushed • Picture Illustrated to the limit, and good 'ol Numero Uno • Ultra Light Balsa piece of 1/4 inch sheet on the original. Mini Bearing The re m a in in g c o n s tru c tio n is finally broke its center section a hun­ Micro Washers dred feet up. Well, it crashed kinda hard Pirelli Rubber coventional. $3.95 Finishing: Except for the cowling, and finished off the center section some which is painted red, the entire model is more. covered with yellow tissue. As durability The only problem was, Alex was was a more important consideration planning to borrow #1 for the semis the than weight, the model was covered following week. w ith domestic tissue, not Japanese The morning of the contest (6 a.m.) he STARSHIP $1.00! tissue. The red trim (side stripes, wing finished covering the new center sec­ with Williams Book or $20 Order tion. This time he made it stronger than INDOOR MODEL AIRPLANES by Ron Williams and tail scalloping, and wing registration 264 Pgs. and Over 200 Illustrations plus 2 FREE numbers) was accomplished by doping before, with a bigger spar which he Full Size Plan Sheets for I.M.S. Easy r,B " .. $12.95 INDOOR MODEL AIRPLANES by Lew Qltlow red tissue directly to the yellow base. extended all the way out to the Mono- 46 Pgs. A Over 100 llustratlons (reprint)-----$3.95 The same was true of the black "27” race kote for extra depth. Too bad he didn’t PEANUT POWER by Hannan. 80 Pgs...... $8.95 INDOOR BALSA $6.95 P NUT BALSA PACK $6.95 numbers on the wings and fuselage have time to put on the cap strips!! Can JAPANESE TISSUE In 6 Colors you imagine what that 15% thick airfoil 12 Pack $3.50 Roll of 10 large $5.95 sides. You may want to make peg ROLL OF MICROLITE COVERING______$3.25 anchors at fuselage Formers 7 and 8 in looked like sans cap strips!?? CONDENSER PAPER $2.50-WASHERS $1.50 order to experiment with their effects Alex nick-named his conglomeration RUBBER LUBE $1.50-CEMENT $1.50 of Gemini parts, "Rent-A-Wreck.” And THRUST BEARING: New Tiny .50 New Dual 1.00 on the flying characteristics of the NEW MARK 1 WINDERS —16:1______$11.95 finished ship. The wheels, of course, are nobody would have taken a serious look NEW SMOOTHIE W INDERS-6:1______$3.95 in the retracted position, which was at the darned thing if Alex hadn’t flown 6.1 Winder only $1.95 with $25 Order simulated with black tissue semi-circles this untrimmed, unproven MTS to the ALL ORDERS A KITS ADD 10% POSTAGE and inked pants outlines. Control sur­ best top speed of the meet I!! It's true, he Minimum postage $1.50 faces were likewise inked with a .5 mm was the fastest. Try 26.1 seconds. I think 16 PG. CATALOG $1.00 technical pen. he’s headed for a new nickname. I BOX C, 04B8CBVILLE, CA 954401 Flying The final outcome was: Ittner, first My CR-3 uses an 8-inch plastic prop (TAI-PAN); Odle, second (RO-15); to buy either a 3/8 or 1/2 inch extruded and is flown on four strands (two loops) Bower, third (Gemini MTS); Jolly, fourth aluminum channel and a steel bar of fresh 3/16 SIC rubber, 30 inches long. (Focus); Mike Reagan,fifth (Lyre Bird 9); (square) of the same measurement. Trimming, as suggested earlier, was Mike Charles, sixth (Focus). Check to see that the bar slides freely in something of a nightmare. My model We can apply F3B technology to our the channel or it will be useless to you. required about two degrees of negative own designs and improve them. Here’s The channel will generally run a few stab incidence and a small amount of one idea that we can use to strengthen thousandths wider than the bar, and this noseweight (don't forget that the cowl- our wings. If you’ve ever broken a wing won’t be a problem, but check anyway. was deliberately made to be heavy). In while launching a glider or had it blow Next, you need carbon tow, epoxy, addition, several degrees of down and up in a high-G maneuver, this might and the proper size spruce spar cap. right-thrust were shimmed into the interest you. If you don’t have an outlet for carbon noseblock in order to get the craft to fly Most of you have probably heard of or epoxy near you, try California Custom right under power. Just remember that carbon fiber spars. They’re the ones with Yachts, 531 N. Francisca Ave., Redondo the real CR-3 exhibited dangerous lots of strength, right? You’d better Beach, CA 90277; phone: (213)821-6762, instability and vibration on its early believe it! The following method of UPS freight service anywhere in the U.S. flights. The problems were corrected in making carbon fiber spars was devel­ They have both the 1 inch carbon tow (6 the racer and they can be in your ship, oped by Mike Bame (as far as I know), inch also) on 100 foot rolls, and the too. · and is a very effective way of beefing up epoxy (West Systems, by Gougeon your next set of wings. Bros.). You might try Aircraft Spruce and As I have illustrated, this method is a Specialty, 201 W. Truslow Ave. (P.O. Box Soaring...... Continued from page 33 composite spruce/carbon spar, not truly 424), Fullerton, CA 92632 for Safety- a pure carbon spar. However, this Poxy, which is reportedly a good epoxy into his record flight, and it was never method could be used for a solid spar with low toxicity and good wet-out recovered. No great loss, there was just as easily. qualities. another set around Ed’s garage that What you need to do is decide how Basically, the procedure is simple. First wasn’t being used from an earlier wide a spar you need to make. Three- you take a good mold wax (or floor wax Gemini prototype. eighths of an ince is a pretty common with a lot of carnuba in it) and wax down Then came what looked like the end size, but for a really beefy spar, 1/2 inch the channel with it. Repeat the waxing for MTS number 1. A week before the is better. Once that is decided, you need once. Wipe out any excess wax. Then NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 93 be practical) that could break those wings. Another FAI/F3B spinoff that I could see being useful to the more advanced builder is fiberglass wing skins over foam cores. This is by no means a really new idea, but one that is now becoming more popular among those fliers seeking that little extra gimmick to make their sailplane more flashy or efficient. In principle, the idea is again, simple, but this time the execution of the idea will require special tools. The idea is to lay up a fiberglass skin on a thick sheet of mylar then transfer this skin to the foam core and press it tight against the core by means of a vacuum bag and pump. The mylar keeps the outer glass skin as smooth as . . . well . . . glass, and the atmospheric pressure (up to 14 pounds per square inch is available) bonds the epoxy and glass cloth to the core with completely even pressure. VINTAGE R-C FLANS The special tools would, of course, be the vacuum pump and the foam core cutter. The cores can be cut by someone OLD TIMER KITS, (Full and Partial Kits) P i W Semi-Kits Combined with full stripwood other than you. Hi Johnson’s catalog is a nd plan. (Now incl. Wire. Window, etc. M a t.) full of cores that you can order. Write to (W o f e ; These may be purchased lust as semi- kits, o r w i t h plans--write or c a ll for prices.) Super Wings, 11015 Glenoaks Blvd., f t . w ing span 1936 Buccaneer-84"-$51; 1938 Clipper MK 1-72”--$39 9 Pacoima, CA 91331, or phone (213) 1937 Dallairo Spts’o r-108”-$61; 1940 R anger-46"-$27 ALL RIBS a FULL FORMERS SHOWN ON PLANS 11 1939 M ercury-72"--$56; 1935 Miss Am erica-84"- $59 PLASTIC ENG.COWLS ) 9 .9 0 PR. 899-4312. I believe custom cores can be 1941 Playboy J r .-54” $29; 1941 Playboy Sr-80"-$46 CLEAR GUN BLISTERS $ 6 .6 0 PR. purchased also . . . you provide the 1938 Power House-84"--$43; 1940 Sailplane-78"--$74 1940 So Long-50"--$28; 1938 Trenton Terror-72”- $32 a LARGE PLAN SHEETS — Plans $16.95 templates to their specs. 1939 Zipper-54"- $48; 1939 Korda W akefield-44"- $17 Mike Bame will also cut foam cores to MIDWAY MODEL CO. Semi-kits Combined w/strip 6 f t . WING SPAN MODEL PBY-5A 1936 Flying Quaker-84"-$49; 1937Quaker Flash-67"$38 ENGINE COWLS « 6 .50 PR. RdflS $ 12.95 your specs, but I suggest you write to 1937 Long Cabin-78"-$42; 1937 Air Chief-67" -$40 GUN BLISTERS > 4.50 PR ADO tg ^ O POSTAGE LEIIMBERG ENT. Semi-kit--Cut parts and plan nim first and tell him what you would 1939 Feather-Merchant. 80" Span (scaled=R/C$19.50 CATALOG-OVER 50 PLANS J I 00 DEALERS WRITE like to have cut. He could advise you on MIDWAY MODEL CO. Full kits R/C or FF many things related to foam core wings. 1939 AirTrails Sportster. 50". .10-.15 R/C $35.96 WORLD WIDE 1938 Power House. 50". .10-. 15 R/C $35.9G His address is 830 26th St., Santa Monica, 1935 .020 Miss America, 36" FF or lch R/C $12.95 SID MORGAN 1940 .020 Clipper MK II. 36" FF or lch R/C $14.95 CA 90403. 13157 ORMOND, BELLEVILLE, MICH, 48III U.S-A. 1940 .020 Comet Sailplane. 36" FF/lch R/C $14,95 As far as the vacuum bag equipment 1940 .020 Buzzard Bombshell. 30" PF/lch R/C$11.95 OLD TIMER AND CONTEMPORARY KITS-Full Kits goes, well, next month I’ll show you how 194! Strato Streak (F A I) 33". 020 FF. lch R/C$14.95 important! In the end, the less epoxy left Sal Taibl's JA Spacer F F . (Campbell) 42" Cut $15.98 I did it with some readily available stuff Super 30. P-30 Rubber (Campbell) 30" Cut $11.49 in the fibers, the stronger the spar will for very little money. Fun Bird '30·. P-30 Rubber (Flite-Rite)30n $13.95 be, so don’t just glop on a lot of epoxy. Consolidated PT-1 Bibe, .020 or Rubber $15.26 That’s it for now, remember, if you Pacific Ace Partial Kits (Schluter): 20" Span $3.25 Next, place the spruce cap in the chan­ want this column to reflect your inter­ 30" Span $4.70; 40" Span $6.65-(Rubber Powered) nel, making sure that you don’t trap air 1941 [Electric) Playboy Sr (Leisure) 67"/05 $30.00 ests, I’ve got to know what they are. If [Electric] Porterfield Collegiate (Astro)67"/I5$40.00 here either. Now, place a thin plastic you have something that you feel other Leisure 05 Flight System (Pattern or Racing) $55.00 sheet over the channel (trash bag plastic Astro 15 Flight System, Direct Drive glider guiders should know, write me at Leisure Geared 05 System (complete) $75.00 would be okay). The square metal bar 487 Mesa Rd., Santa Monica, CA 90402. Astro 15 Belt Drive System (complcto) $115.00 goes over the plastic next. HOBBY HORN PLANS SERVICE SCALE PLANS Good lift. · Dougins DC-3. 72". Twin 15’s. 1.75" = l' $10.00 If you have an encyclopedia set, or ------H Q q i j,pr plans and SHIPPING AND HANDLING: anything heavy (100 pounds or more Up to $8.00 add $1.50, scale drawings available Big B irds...... Continued from page 30 $8,01 to $20.00 add $2.25, 64 Page CATALOGUE would be about right), stack it on top of $20.01 to $45.00 add $3.00. $2.00 PP/lst Class $45.01 to $70.00 add $3.50. A copy will be sent the assembly. This will compress the and over $70.00 add $4.00. free— when requested- fibers together and hopefully squeeze . .. the Waco ARE. I just received my set CA Addressees add 6% tax. with an order. ______yesterday and spent a most pleasurable Send MO, Visa/MC( #+Exp.) H O B B Y H O R N out excess epoxy. Let it cure overnight or Check (allow up to 30 ••hobby specialties·· or longer. two hours just “ browsing” through days for check clearance.) P.O. BOX 2212 them. Now it's true that Brisighella’s COD=Exact Charges + $1.50 Westminster, Ca 92683(Í If you did it right, the bar should pop HdK (Cash Onlv)[All UPS] (714) 893-8311 right out. With a little force, the spar cap getting old, but no matter how adversely should also pop right out. Trim off the any of his other functions have been excess epoxy that oozed out overnight affected by age, his mind and his hands take your 1 inch carbon tow and cut it to using a file and sandpaper. That’s it! If it can still work together in harmony and strips the size of the channel. Mix up sounds simple, that’s because it is simple. turn out great plans . . . the kind that some epoxy and pour it into the channel This process adds very little thickness to make you behave like one of Pavlov's (a small bead down the length will do the spruce cap so that it can be easily dogs as soon as you roll them open. Tell nicely). Spread this bead out. Now incorporated into a stock kit by sanding you what, if you don’t get the instant carefully place the carbon tow on top of the spar notches in the ribs a little bit. If hots to build this tail-draggin’ cabin the epoxy and with a squared off pop- you so this, beef up the shear webs too bipe, then you ain't got no soul and sicle stick carefully dab the epoxy or all will be for naught. You shouldn't should stick to kits that have those through the tow. You will probably need need to fear a good 12-volt winch again! “ training wheels” found on the "smaller to put a little more epoxy over the tow This type of molded spruce and car­ stuff.” and work it through to fully wet out the bon spar was used by Mike Bame on his Before I received these Waco plans, I fibers. “ Illusion” two-meter which was figured that I’d live to the ripe old age of Continue to add layers of tow, being launched off the Gorilla winch at the 150 ... ’cause that’s how much time I very careful not to trap air between semifinals at Carson, California. There was gonna need to complete all the BIG layers and to wet out the fibers. . . very probably isn’t a winch made (that would Bird projects that are lined up. Now,

94 MODEL BUILDER Ace R/C, Inc...... 67 Rhom Products...... 72 Aircraft Spruce & Specialty Co...... 74 INDEX TO ADVERTISERS Satellite City ...... 75 American R/C Helicopters...... 69 Schlueter F/F M odels...... 89 Associated Electrics...... 79 Sig Mfg. Co., Inc...... 4,5 Astro Flight...... 70 Kraft Systems, Inc...... 71 Francis Smith’s Ship Y a rd ...... 77 Bavarian Precision Products...... 73 K&S Engineering...... 82 Sterling Models ...... 66 Byron O riginals...... Cover 2 Kustom Kraftsmanship...... 92 Tatone Products...... 82 Bud Caddell Plans...... 74 Lehmberg Enterprises...... 92 Taubman Plan Service...... 99 Campbell Custom K its ...... 72 Lutmi Enterprises...... 87 Taylor-Craft Plans, Ltd...... 72 Ray Cappola Custom K its ...... 84 McDaniel's R/C...... 98 T&D Fiberglass...... 92 Cannon R/C Systems...... 68 Midway Model Company...... 80 Technopower II ...... 81 Contempo Hobby Products ...... 87 Midwest Model S upply...... 70 TEJA Engineering...... 78 C overite...... 86 Model Products Corp...... 84 Uber Skiver Knives ...... Cover 3 Jim Crocket R eplicas...... 88 Model Rectifier Corp...... Cover 4 Wandit ...... 74 Davis Diesel Development, Inc...... 90 Walt Mooney Peanuts...... 94 Wardcraft Marine...... 68 Du-Bro P roducts...... 83 Moped Factory, The ...... 90 Wescraft ...... 78 Electronic Model Systems...... 90 Sid Morgan Plans...... 94 Williams Bros...... 91 FAI Model Supply ...... 93 Northrop Real Estate...... 86 Wilshire M odels...... 89 Fox Mfg., Inc...... 85 Octura Models ...... 76 Futaba Industries...... 3 O.V. Engineering...... 81 H O U S E A D S Dick Hanson Models...... 92 Peck-Polymers ...... 98 Binders ...... 88 Hobby H orn...... 94 John Pond O.T. Plans...... 90 Classifieds ...... 95 Indoor Model Supply ...... 93 Proctor Enterprises...... 84 Full Size Plans...... 96,97 International Modeler S h o w ...... 1 R/C Modelle ...... 80 Model Builder's Biggies...... 99 K&B Manufacturing...... 68 RAM Radio Controlled Models...... 86 Oldies But Goodies...... 100

FOR SALE: Two Helicopters; Shark 60 and CLASSIFIED ADS Revolution. Both for $350. Mike Turner, 3200 E. Genesee, Saginaw, Ml 48601 Non-commercial (personal items) rate is 25 cents per word, with a minimum of $3.00. Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency AVIATION MAGAZINES from 1947: MAN. discounts allowed. Air Trails, R.C Modeler, etc Send large A ll ads are payable with order, and may be for any consecutive insertion period specified. S.A.S.E. and 50® lor list Pappy Colvin. P.O. Name and address free, phone number counts as two words. Send ad and payment to: Box 251. Wilcox, AZ 85643. MODEL BUILDER, Classified Ads, Box 335, 621 West 19th St., Costa Mesa, CA 92627. WANTED: Built, for Static Collection; Sterling Kits; ff P-2 Monocoupe, ft P-5 Stearman PT-17. WANTED: In excellent shape, mfgr's desk WANTED — OLD MODEL ignition engines, if E-4-P-40. and ffE-15-P-61. Super clean! Will models with stands: WR or RB-57 (long wing cars, etc Paying top dollar Bill Simpson. 7413 pay for photo. LJ. Blum, P.O. Box 997, Ocala, version), U-2, X-15, all other X-1 through X-5, Via Lorado. Rancho Palos Verdes. CA 90274. FL 32678. D-558-I and II Skyrockets. L.J.B. P O. Box (213) 377-3532 997, Ocala, FL 32678 ENGINE COLLECTION SALE: The collection VIDEOTAPE — Two hour tape of 1982 1 /8th consists of 450 powerplants, many in excel­ Air Force scale fly-in. Unedited. $40.00 P.P., lent condition, included are spark ignition, specify VHS or Beta format. Wright Enter­ glow, diesel, and C02 units All have appro­ CLEVELAND'S 1400 AUTHENTIC, prototype prises, 13315 Chico Rd. N.E., Albuquerque, priate plugs and accessories and have been practice scale flying model plans, 1/32-1/4 NM 87123 carefully inspected and described in an eight- size Pictorial catalog including prices $1.50. page list, offering 115 groups of four en­ Price list alone 60® or SASE and 25C. KITS CUT from full size plans. Send $2.50 for gines each. Send one dollar and legal size Cleveland Models, 10307M1 Detroit, Cleve­ catalog. Repli-Kit, P.O. Box 2066. Inverness, S.A.S.E with 2 stamps to: Granger Williams, land, OH 44102, FL 32650. 181 Pawnee. San Marcos. CA 92069. thanks to Dario and his new “ ARE" NON-SCALERS! ARISE have their “ flying weight" changed to plans, my lifespan has just taken another AND BE COUNTED... read . . . “ Wishful Thinking Weight." jump. It’s been slim pickin’s for the sport According to every one of these guys, There is one thing terribly wrong with flyers who don't want, or need, scale building and flying the "Snapper” was Dario’s plans; only two (the "Starduster type birds. These guys want fast building, pure delight; a couple of them admitted Too" and the "Waco ARE"— are avail­ good aircraft that look better (more that they pretty much hated to build, but able (so far). realistic) than a Big Stick, but that don’t found this kit to be less objectionable HIRSH SAW TABLE ADDENDUM have to be a miniature of anything full- than anything they had tried. In my infinite widsom I gave you size. The finished product has eye-appeal. everything you needed to know about And Bob Johnson, (R&R Models, 1611 “ It looks like it might have been a home- the saw table (BIG Birds, July ’82) . .. Red Bud Dr., Northwood, Ohio 43619; built,” is the remark I kept hearing, over except the Hirsh Company’s address. 419/691-6525) seems to have answered and over again. Even spectators like its You see, it never dawned on me that the the call for help with his “ Snapper.” simple, clean lines (the two I flew had table might not be available in all parts of Although I haven’t (yet) built one, I have cowls, which really dressed them up), the country, and as a result, a lot of had the pleasure of flying two of them; and were anxious to see the birds frustrated guys wrote demanding to both Snappers weighed 17 pounds and perform. Both airplanes had pilots in know the Hirsh Company’s address so were "snappy” (pun intended) per­ residence, which added a bunch to the they could find out where the nearest formers with out-of-the-box, stock "home-built" image. dealer is. Quadras. The two owners kept raving My coordination and sense of timing I apologize for leaving so many hang­ about the quick building; I would have have gone downhill enough to make me ing, but here, at last, is their address: The been more than happy even if the bird feel uncomfortable with most fully Hirsh Company, 8501 Central Park Ave­ took twice the time, considering how aerobatic BIG Birds (that’s why I love my nue, Skokie, Illinois 60076. much of a superb flying machine it is. C-3 and other puddle jumpers). But not And while you're looking at the saw I’ve since talked to a few other "Snap­ so with the "Snapper.” In spite of being table, take the time to check out their per" owners and found out that 16-17 a pretty clean, fast machine, she's honest router and sabre saw table, and their pounds is a very realistic gross weight, and predictable; like handling a good $29.95 work bench; all good items. .. unlike so many other kits that should road car. Gotta admit that both “ Snap-

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS, TELL EM MODEL BUILDER SENT YOU! 95 FULL SIZE PLANS SERVICE No. 782-C.P. J-3 CUB $2.00 Να 2821 ACRO SPORTSTER 40 $6.00 An official 1942 Piper Aircrafi Corp. Sport/patlern low winger, open cockpit, Including reprint of construction article plan for 25" span rubber scale model. tail dragger, .40 powered. Peter Neuer. (if any) No. 782-0.T. MOFFETT WINNER $3.50 No. 2822 MESSERSCHMITT M33 $200 Roy Nelder's most functionally beautiful Semi-scale, "bathtub" style, CO 9 po w e r­ No. 4733 PEA POD $ 6.00 1940 winner, from Nov. 1940 A ir Trails. ed sport free flight. By Jack Headley. Orig. Protheroe plans and templates, plus reprint of Nov.'82 mods by Ken Cashion. No. 6821 DUCKLING $3.50 No. 282-0.T. VIRGINIA CHAMP $100 All sheet wood R/C flying boat for mini Little-known, but sharp Class C pylon, No. 11821 CESSNA CR-3 $2.50 radio and .02-.049 engine. Ken Willard. April '40 F.A., 60" span. By Bob Little. Competition rubber scale of little known racer, by F.A.C. member Mark Fineman. No. 6822 ASCENDER $4.00 No. 1821 Model Builder RAVEN $5.75 Smooth flying, trike geared, tractor can­ Latest in a long line of tailless R/C sail­ No. 1182-OT CHAMP STICK MODELS250 ard. Ace foam wings, .15-.25. Skip Ruff. planes, span 110", 2-ch. By Dave Jones. A 38" span Class C rubber ship from the May '40 issue of A ir Trails, by Al Casano. No. 682-0.T. THE HERALD $4.50 No. 182-C.P. SUPER G SHARK $200 Pod/boom, twin ruddered, Class B pylon No. 1182-CP FAIRCHILD "24" $5.00 An historic two-line controlled model of gassie from May 1941 AT. Gene Chaille. Classic Ranger version, 28" span rubber classic lines; one of many by Vic Stanzel. scale, fro m A ce W hitm a n k it. T w o sheets. No. 5821 BUCKER JUNGMAN $15.75 No. 182-0.T. HI-HO $3.50 Aerobatic quarter-scale model for geared A 1940 convertible stick/Wakefield; uses No. 10821 KRIER GREAT LAKES $16.95 90, 1.2 direct, or Quadra. By Gene Pond. demountable cabin/pod. By Ed Lidgard. Three-inch scale at its best. For Quadra engine. Under 20 lbs. By Larry Scott. No. 5822 CRYSTAL AMANITA $100 Να 12811 XINGU $4.00 A ll sheet bass and balsaw ood 1 /2 A sport High performance F3B type sailplane of No. 1082-0.T. NEW RULER $6.00 C/L for all skill levels. By Tyrone Parker. contemporary construction. Ken Stuhr. One o f best H ank S tru c k gassies, fro m April/May '40 A.T. Constr. article incl. No. 582-0.T. CONTEST WINNER $3.00 Να 12812 A.J. INTERCEPTOR $100 High climbing diamond fuselage rubber Replica of the famous Jim Walker folding ship from '38 Air Trails. Henry Struck. wing catapult glider. By Dave Thornburg. Να 9821 SAND FLI $4.00 Easy built, .049 powered flying boat-like No. 4821 LOCKHEED VEGA $7.50 No. 12813 SUNDAY FLYER $250 2-ch. R/C sport biplane. By Bob Banka. Exact 1-1/4" R/C scale model of Jimmie Easy beginner's 1/2A sport F/F. One-day Mattern's Vega, 50" span. Walt Musciano. assembly. Ace foam wings. Ken Willard. No. 9822 ELECTRIC BRIGADIER $4.00 No. 1281-O.T. FOLLY II $4.00 Early post WW-II Berkeley kit design re­ No. 4822 AIR XX "PYLONER" $1.50 Beautiful aerodynamic lines on this 6-ft. AIR XX (20" Antique IndoorRubber) of turns as 05 electric R/C. Mitch Poling. gas job. Pic in July '37 MAN. Rod Doy la typica l O .T. gas m odel. B y Ken Johnson. No. 9823 DAPHNE $2.00 No. 11811 WACO TAPERWING $17.95 Sharp little 20" span rubber scale model No. 4823 SCHNIEDAIR $2.50 Sensational 1/4-scale R/C model of Bob of a cabin homebuilt. By Perry Peterson. Composite of typical Schneider Cup rac­ Lyjack's Waco. 2.5-3.5 eng. Larry Scott. er, fo r CO2 or rubber. By Walt Winberg. No. 9824 THE PAWN $2.50 Contest-proven, foam wing Half-A con­ No. 482-0.T. TIGER SHARK $6.00 No. 11810.T. HALF-PINT $2.50 trol line combat machine. By Paul Smith. Enlarged, R/C version of nostalgic Victor Tiny (24-3/4" span) pylon free flight gas Stanzel G liner. 61" span. Harold Lanser. model tor Atom or .020. Louis Garami. Να 982-0.T. ARROW $4.50 Cl. A '40 Nats winner and record setter. No. 3821 GREAT LAKES 2T-1E $17.95 Minimum of $5.00 on credit card orders. Pylon. Detailed instructions. Bill Gibson. One-fourth R/C scale model of popular Classic Era bipe. 3 sheets. Frank Corny ns. Complete list of over 400 plans, SOi NEW ORDERING INSTRUCTIONS No. 8821 BOTHORNE $1.50 No. 3822 SIMPLE SIMON $3.50 Tailless rubber ship for Boston Cabin or Really simple 1/2A sport R/C for 2-4 ch. Price includes 3rd or 4th Class mail. For air­ Hawthorne Flying Wing rules. B.Wainfan. Uses Ace foam wings. By Frank Roales. mail or First Class (Priority) in U.S., add 25% of total order. For Overseas Airmail (in­ No. 882-0.T. SNOW WHITE Sia95 cludes Canada and Mexico), add 50% of to­ No. 3823 PEANUT HOT CANARY $200 tal order. Remit by International Moner Or­ Joe Raspante's famed 8 ft. span Beauty Sharp slaggerwing biplane racer, big for a winner. Plans direct from original model. der or U.S. funds drawn on a U.S. bank on Peanut but meets rules. By Bob Sweitzer Overseas orders. Postage paid for APO and FPO orders. Master Card or VISA accepted. No. 7821 MONARCH $5.00 No. 3824 1912 BLACKBURN $4.00 Include card number, expiration date, and R/C 6 ft. span swept, flying wing glider Free flight 1-1/2 inch scale model of fa­ signature. with fuselage, fin/rudder. By Bill Young. mous antique monoplane. By Sid Miller. CALIFORNIA RESIDENTS ADD 6% TAX. No. 7822 WHITEHEAD NO. 21 $4.00 MODEL BUILDER PLANS SERVICE No. 382 O.T. TWIN PUSHER $3.50 Possible pre-Wright Bros, flyer in rubber Record setting rubber ship from Aug '36 621 West 19th. St.. Box 335 F/F, 40" span. It flies! By Ken Johnson. Model Aircraft Builder. Ralph Kummer. COSTA MESA, CA 92627-0132 pers” made me look as though I was in tive” (?) part. look for. And please remember, guys, complete control and knew what I was If you don’t give a hoot about scale, that I can’t return the B&W prints that doing all the time. What more can you but appreciate an easy building, nice are used! (Correction: If you want ’em ask of an airplane? looking, excellent flying machine . . . back, put a sticker with name and The "Snapper” has been joined by then do give R&R Models a toot. address and "please return” along the another kit called the "Stinger,” which PHOTOS AND COLOR NEGATIVES bottom edge of photo, wen) looks a bit like a super-size Kaos (a la tail Like any other columnist, I’m always Now, most of you don’t have a dark­ dragger). It uses the same 86 inch wing on the prowl for good pix . . . but I’ve room, very few use B&W, and shoot only and, not too strangely, also grosses out at had to return quite a few ’cause they color. No sweat, ’cause I can make good 17 pounds. And almost ready for kitting weren’t usable. So to help us both out, B&W prints from color negs (no slides) is Bob's new "Snapper Twoo" (dontcha here’s the skinny on photos... and promise to take care of each and love that spelling) that he touts as being B&W glossy prints (at least 4x5) are every frame as if they were my own “ a much needed, non-scale, non- preferred; please no Polaroid prints negatives. Please include a SASE so I’ll descriptive aerobatic bipe.” Since Mr. because: 1) the quality is usually poor, know you really want the stuff back. And Johnson didn’t lie about the "Snapper," which makes for l-o-u-s-y magazine keep in mind that the pix don’t have to I’ve got to believe what he says about his pics, 2) they’re much too small and be limited to flight line and flying shots; new bipe, especially the “ non-descrip- always lack the necessary detail we all interesting workshop activity and con-

96 MODEL BUILDER R. y M O D E L 'c BUILDER'S 4 0 BEST S ELLER S ! SEE PAGE 100 FOR ORDERING INSTRUCTIONS. COMPLETE PLANS LIST SENT WITH EACH ORDER.

No. 6781 LOCKHEED P-38L $12.00 No. 7724 TRAVELAIR '2000' $5.00 R/C Sport Scale, balsa and ply const., a Two inch full scale Classic R/C biplane trophy winner, big, 8‘ span. Art Johnson. No. 2761 DRAGONFLY $4.50 Proven flier, 60 power By Bill Northrop No. 3771 WACO UPF-7 S5.00 R/C funship, looks like giant rubber stick No. 7721 FAIRCHILD 51 *3.50 Stand-off R/C scale 11 8" Γ) of one of the model Superb trainer By Tex Newman. One inch scale Classic for R/C. also F/F prettiest Waco biplanes. Span 54V R. Steely. No. 8741 WOODY PUSHER $4.00 gas or ru bber By H urst Bowers No. 12711 CURTISS WRIGHT JR. $4.50 Easy to build & fly semi-scale R/C home- No. 879-C.P. CURTISS F-11C 4 S4.00 Two inch scale model of famous pusher built. like C.W. Jr, .09-.15. Chris Moes. Reprint of Miniature Aircraft Corp. plans light plane R/C By Ralph Fidance No. 9781 GREAT LAKES TRAINER $4.00 plus ribs and bulkheads from pnntwood Sport scale biplane for 3-4 channels and .19 engines, 40" span. By Bill Northrop. No. 4801 BRUSHFIRE $6.00 C ontem po rary design being used b y sev­ eral top pattern fliers. By Ken Bonnema. No. 2801 TIPORARE $6.50 Top pattern ship in 1979. Flown by Dave Brown at World Champs. Dick Hanson.

No. 8723 TAYLORCRAFT, F/F $150 No. 6771 GIPSY MOTH $12.00 Rubber powered, 24-inch scale seaplane Exact quarter-scale (7-1/2 ft span! R/C An excellent flyer. By Walt Mooney of famous D.H. bipe By Bill Northrop. No. 579-O.T. TAYLORCRAFT $12.00 No. 1722 PUSS MOTH S4.00 Quarter-scale in 19411 Famous 9-foot de­ Chet Lanzo's famous rubber F/F scale sign kitted by Miniature Aircraft Corp. Puss Moth returns' By Hal Cover No. 10753 SUPER PUP S3.00 No. 680-C.P. GRUMMAN F3F-1 $4.00 Profile C/L stunt ship for .29 to .36 pow­ Reprint of Miniature Aircraft Corp. plans er, 42" span. Easy-built. Mike Parenteau plus ribs and bulkheads from printwood. No. 8781 R/C VELIE MONOCOUPE $9.50 NO. 47 42 C ESSN A AW $3.50 Light-weight 1/4-scale for belt reduction Jumbo scale rubber powered model of a electric power, 90" span. Bob Boucher. 1928 classic. Span 48". By Jim Adams.

No. 4751 R/C AUTOGYRO $4.00 Semi scale twin rotor R/C autogyro for 35 engines. Very stable. By Skip Ruff No. 9792 CRICKET $3.00 Balsa profile fuse, Ace foam wing 1/2A quickie for 1 or 2-ch radio. J. Headley. No. 1174-0.T. LANZO STICK $3.50 Rubber stick winner, '40 Nats. Span 4VS'. No. 1731 SPROOSE GOOSE $5.00 Still good in Unlim. By Phil Bernhardt. EAA type R/C sport biplane, mostly No. 574-O.T. The T-D COUPE $5.00 spruce, for 60 engines By Bill Northrop Classic high wing 1936 ’C' cabin gas job. Span 64" Redrawn by Phil Bernhardt. No. 11781 TRAVEL AIR D4D S8.00 Accurate 2-inch R/C scale model of fam­ No. 773-OT LANZO 8' GAS MODEL $6.00 ous Golden Era biplane. By Bill Seidler. Chet Lanzo's famous "Record Breaker." No. 11731 BIG JOHN the FIRST $7.50 Two large plan sheets By Phil Bernhardt. Modified prototype ol editor's notorious No. 874 O.T. POWERHOUSE $5 00 monster R/C biplane By Bill Northrop Taibi's famous design for Forster 99 ign. No. 1080-C.P. STINSON RELIANT $4.00 Great for R/C O. T By Phil Bernhardt A 3/4" scale model from 1934 Ideal kit. No. 4733 PEA POD S4.50 Excellent plans for F/F rubber, R/C, etc A 36" long R/C sailboat easily made of No. 1723 WHITE TRASH $4.00 1/8" Luan mahogany Clever sail control A proven, trophy winning R/C sailplane Full size patterns. By Tom Protheroe with 7 and 10 ft span By Rick Walters No. 5761 ALBATROS S5.50 No. 7801 APPRENTICE $5.00 R/C sport scale post-war German light- Continually popular genuine R/C trainer plane. Span 74", .36 eng. By Jeff Breece. for .19·.35 eng., 72" span. Bill Northrop. No. 176 O.T. KORDA WAKEFIELD S2.50 The classic of all rubber powered comp­ No. 174-OT EHLING '37 GAS JOB $5.00 etition free flights By Phil Bernhardt Frank Ehling's 8 ft. span 1937 gas model. Still winning1 Drawn by Phil Bernhardt. No. 477-O.T. CLOUD CHASER $1.50 This 30" span stick job from 1938 MAN is OT, FF trainer. Unlim. Bruno Marchi. No. 12792 EXCALIBER II $5.00 No. 175-O.T. FLYING QUAKER $5 00 First gas m odel k it by Megow, 1937. R/C tunnel-hull outboard constructed of Span 7 ft. Redrawn by Phil Bernhardt. plywood, for K&B .21. By Jerry Dunlap. No. 9783 R/C STEAM LAUNCH S6.00 No. 12741 85' HARBOR TUG $8.00 Natural finish mahogany planked 40" OA Complete plans (3 sheets) for R/C tug. "African Queen" type Kilburn Adams. All wood, 37" LOA. By Francis Smith.

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 97 OVER 50 CONSECUTIVE STARTS WITHOUT RECHARGING excellent response to the Homelite built. Magnum 11 engine. INTRODUCING THE Modelers and customers should write NI-ST ARTER " to Contempo Hobby Products for the P A ! P I NO INC. name of their closest dealer. Contempo A new and completely revolutionary concept of power tor glow plugs in model cars, boats, air­ Hobby Products, 11611 Cantara St., planes. helicopters, anything using the 1.5 vt. Standard plug for glow engines Rechargable. North Hollywood, CA 91605, or call (213) (up to 1000 times) Fits in your pocket. Works 768-2800 for more information. sideways or inverted. Fits through cowlings. Uses Head Lock ™ plug adapter. Stays on tne plug, ★ ★ ★ not in the propeller. Incl charger & instructions 90 day guarantee. After that, if anything fails The latest offering from W.E. Technical (normal usage) we will repair or replace it for only 56. for up to one (1) full year!! SEE YOUR Services is its one-sixth scale, R/C DEALER OR CALL US - BANK CARDS OK. COD model of the famous British "Puss OK. YOU PAY SHIPPING $21.95 Moth.” This is one of the first large R/C See Your Dealer versions to be made available. Spanning vL 73-1/2 inches and using a .20 engine, full 13506 Glendundee Dr. Herndon, VA 22071 scale lightplane flight performance is assured. A .40 may be used by those SERVICE (703) 435-5805 desiring more spirited performance. Scale rib spacing is provided, along with rearward folding wings, as on the real aircraft, for easier handling and flight THE PEANUT-PEOPLE PRESENT preparation. Markings and details for PEANUT S U L E MODELS SPORT MODELS BUILDING NEEDS several historical Moths are provided on the plans. Plan and pattern set. No. RC6S-3 includes three full-size blueprint sheets, instructions, and a complete bill PROPS. TISSUE. RUBBER. WINOERS. of materials. Price is $14.95; please add MUSTANG PRAIRIE BIRD — BLADE SHARPENERS. BEARINGS. K IT $5.95 PROP SHAFTS. LUBE. WASHERS. $2.00 if you wish it sent in a mailing tube. WHEELS. FUSE. CO-2 MOTORS. MILES M-18 Z ER O B A B Y A C E $6.49 BOOKS. PLANS and MORE. W.E. Technical Services, Inc., P.O. Box DRUINE P IETEN PO L O N E N ITE 28 $6.95 C O U G A R PIPER C U B 76884, Atlanta, CA 30328. ONE NITE 16 $5.95 GIPSY MOTH A N D R E S O N ADVENTURE MODELS STRINGLESS WONDER $4.95 GANAGOBIE L A C E Y M-10 ____ P O N Y B U M P ★ ★ ★ PECK R.O.G. $1.95 11 -FT. R/C AIRSHIP All Rubber Powered PONY J KIT $249.00 If you would like the satisfaction of Bales and Tissue Kits $5.95 RUBBER OR CO-2 POWERED building your own ply and halsawood COMPLETE CATALOG $1.00 h a r d t o f in d ite m s fo r rubber m o d e ls a n d airships aircraft model, but at the same time desire close tolerance parts that don’t M 3 P.O. BOX 2498-MB LA MESA. CAUF. 92041 P eck· P olym ers PHONE (714) 469-8675 or (714) 442-4636 need refitting during assembly . . . a kit with which you can open the box, add glue, shake well, and it’s done . .. con­ struction photos are also most welcome the information that goes with each sider the "Shrike," by Wolff-Pak. This 'cause these help to get a lot of guvs off picture . . . but DON’T write it on the shoulder-wing, 60-inch span, tail-drag- their collective duffs once they see what back of the photos; list all the data on a ger, for .25 to .45 engines and 3 to 4- others are building. And it’s okay to have separate piece of paper (do the same if channel radio, builds from an all wood you or your dog in these pix . . . so try to you’re sending negs), please. kit of machine cut balsa parts, and pre- get that canine to smile. TIP OF THE MONTH cut, shaped, bevelled and drilled ply and If you can, photo coverage of BIG Bird "After things have gone from bad to hardwood parts. Fly-In’s, and especially IMAA Fly-In’s, worse, the cycle will repeat itself." The Shrike’s complete hardware would be absolutely great and very Al Alman, 2609 Burningtree Ct., package includes an ounce of CA glue, much appreciated. Oops . . . almost Arlington, TX 76014. · spinner, fuel tank, silicone fuel tubing, forgot to mention that the only nega­ hinges, horns, pushrods.tail wheel, glass tives I can work with are 35mm; I’m not cloth, wing bolts, screws, aileron horns, set up to handle any other size. Counter...... Continued from page 9 etc. Landing gear is preformed and slips So there it is guys. All you need to into bulkhead. Fuselage sides are know in order to get your pix into “ BIG the Contempo hobby line. Claude notched, as are the wing leading and Birds.” And don’t forget to include all Mischler, owner of Acmex, expects an trailing edges. Average assembly, less covering, takes four to six hours. A 20- page manual leads the way through MOVING? SEND NOTIFICATION FIRST! construction. ^A ttach old label here J~ Attach old label here 1 Introductory price is $68.00 and avail­ NAME ! 1 able at your local shop, or contact Wolff- OLD Pak, 4517 Morning Wind PI., Ft. Wayne, ADDRESS ADDRESS IN 46804, phone (219) 432-4324. · (Plene Print) CITY \ STATE ZIP \

|__ Attach old label here / ^ Attach old label here Workbench. . .. Continued from page 6

NAME NEW in the 20 to 30 pound range don’t bother ADDRESS ADDRESS me. In fact, the latter models don’t have to wait for almost dead-calm conditions (Pleese Print) CITY STATE ZIP in order to fly, as would some of the Mammoths. Change ot address notices must be received one month before date of issue that new While the Super-Monsters (the 50 to address takes effect For prompt service, old label MUST be attached. Post office will 150 pound beasts with huge single/mul- not forward copies unless you pay extra postage. Duplicate issues cannot be sent. tiple engines) are interesting to look at, MODEL BUILDER, Box 10335, 621 West 19th St., Costa Mesa, CA 92627-0132 and the power and weight of them is mind-boggling, they really aren't

98 MODEL BUILDER MODELS BUILDER’S BIGGIES

No. 8781 R/C VELIE MONOCOUPE $9.50 Light-weight 1/4-scale for belt reduction electric power, 90" span. Bob Boucher. No. 12781 GRUMMAN AG-CAT $12.00 Mammoth 2-1/2" R/C scale biplane, for No. 5781 UPTON'S BABY ACE $10.00 2" engines. Span 7.5‘ . Floyd Fitzgerald. No. 8771 GIPSY MOTH $12.00 Exact R/C quarter scale model of popular Exact quarter-scale (7-1/2 ft. span) R/C homebuilt parasol. 78” span Bob Upton. No. 2811 LIBERTY SPORT $17.75 of famous H.D. bipe. By Bill Northrop. No. 91074-O.T. BUHL PUP $6.00 Mammoth 3-1/4" scale biplane for belt- No. 6811 CURTISS P-40 $10.00 Semi-scale 8 ft. span model published in drive 60 on up. Four sheets. Roger Stern. Exact-outline giant/sport R/C scale for 1936 MAN. Redrawn by Phil Bernhardt. .90 power. 80” span. By Art Johnson. No. 6781 LOCKHEED P 38L $12.00 No. 11811 WACO TAPERWING $17.95 R/C Sport Scale, balsa and ply const., a No. 6791 CAP 20L-200 $10.00 Sensational 1/4-scale R/C model of Bob trophy winner, big, 8' span. Art Johnson. Fully aerobatic large-scale low winger for Lyjack's Waco. 2.5-3.5 eng. Larry Scott. 2 cu. in. or red.-drive engines. Jeff tracy. No. 3811 OORMOY "BATHTUB" $15.00 No. 579-0.T. TAYLORCRAFT $12.00 No. 3801 LES LONG'S "W IM PY" $10.00 Unusual 1/3-scale R/C (8' span) early ul­ Quarter-scale in 19411 Famous 9-foot de­ Lightweight R/C 1/4-scale homebuilt for tra-light homebuilt, .40-,60. Hank lltzsch. sign kitted by Miniature Aircraft Corp. electric or gaí, 94" span. By Le Gray. No. 10811 HEATH PARASOL $7.50 No. 10771 KRIER KRAFT $10.00 No. 7812 BIG PROP CHARTS $1.50 Lightweight quarter-scale for .60 power. Large R/C sport scale model of famous Charts for determining best engine and Span 94", two-piece wing. Bob Kitson. aerobatic bipe, 70" span. By Ray Nugen. prop sizes for the "biggies". John Burns. No. 1176 O.T. LUSCOMBE "5 0" $5.50 Scale ship from Dec '40 F A. Suites O.T SEE PAGE 96 FOR ORDERING INSTRUCTIONS. or R/C Sport Scale. 90". Tom Mountjoy. COMPLETE MB PLANS LIST SENT WITH EACH ORDER.

"model airplanes” in the normal sense October '82 cover, and lo and behold, of the words. We must also keep in mind there was an unopened letter (relax Post NOW!!! that we, our models, the people around Office, it came by UPS!) at the bottom of A complete plans and book service for the us, and in most cases, the sites on which the shipping container. After reading scratch modelers ot: we fly, are covered by AMA’s insurance, the letter, it became obvious that there and though no personal injury Super- was a lot more we could have told you BOATS-PLANES-TRAINS-CARS- Monster accidents have occurred at this about artist Bob Benjamin in our Octo­ STEAM ENGINES writing, the higher potential exists ber Workbench column. The TAUBMAN large, illustrated wherever they are flown. “ As I have mentioned in our various ^ca ta lo g ot over 750 plans PLUS the Understand this: I am not against the phone conversations, I am an active 82/83 Plans Handbook No. 2 for building and flying of these Super- modeler in the areas of control line, gas '■'"'boats and cars for $3.00 plus $1.50 Monsters .... I'll beat everyone out the and rubber sport free flight, old timer postage for domestic third class mail door to go see them. But I am against free flight (through SAM 8), R/C.. . with (Canada and Overseas surface mail— their being included within AMA's the emphasis on scale, and am succumb­ $2.00. Overseas Airmail $4.50). coverage of model airplane activities. ing rapidly to thetemptationsofantique Those interested in warships, liners and Therefore, I have proposed that: "Model engine collecting. I also fly the 12"-to- merchant marine, send an additional aircraft weighing in excess of the current the-foot type airplanes; specifically, my $1.00 for the Wiswesser catalog. maximum amount specified in any AMA 1946 Cessna 140, and am active in EAA /s. ★★**★★******. competition category shall not be per­ locally. 82/831“ * ^ ·Plans Handbook mitted to fly in AMA sanctioned compe- "My artwork energies are devoted to No. 1 Free Flight Planes etitions, in AMA insured activities, or at aviation subjects, and I actively solicit No. 3 - Trains and Steam Engines AMA insured flying sites.” There is no custom work to individual client specifi­ No. 4 - Radio Control Planes need for AMA’s responsibility to go cations. In 1980, I completed two large No. 5 - Scale Drawings for Planes beyond the maximum limits imposed by aircraft paintings on commission for the Cost per each, plus the Taubman illus­ the model specifications in its current Commander of the Royal Flight of the trated catalog for plans and books $2.50 rule book. In the 1982-83 book, that Sultanate of Oman, for presentation to plus $1.00 domestic third class mail, Can­ weight limit is 40 pounds. His Majesty the Sultan on Omani Na­ ada and overseas surface (overseas air­ As a side note: perhaps the company tional Day in November of that year. mail $3.50). More than one Plans Hand­ that now insures the AMA membership "I'm affiliated with the Aviation Art book, add $2.00 per each plus $.50 can provide individual insurance to International gallery in Scottsdale, Ari­ postage.(When sending inquires, please modelers who wish to build and fly zona, and am one of the original 13 include an S.A.S.E.). aircraft in the Super-Monster category; members of the International Society of over 40 pounds and powered by engines Aviation Artists, a new honorary group TAUBMAN larger than the specified limits in the dedicated to the promotion of profes­ AMA Rule Book. sional quality fine art devoted to aviation PLANS SERVICE THAT OCTOBER COVER subjects. ISAA’s credo reads in part, ‘to 11 College Drive Box 4G - Dept. MB Just today we were repackaging the promote and preserve the beauty and Jersey City, N.J. 07305 painting which was reproduced on our wonder of the pheonomenon of flight

NOVEMBER 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 99 OLDIES (but still g o o d i e s ;) MOST BACK ISSUES OF MODEL BUILDER ARE STILL AVAILABLE, THOUGH THE SUPPLY IS DWINDLING. THE RE'S A TREASURE OF REFERENCE DATA IN EVERY ONE . . . FULL-SIZE PEANUT PLANS, SUPERB WESTBURG SCALE-VIEWS, HOW-TO ARTICLES (MANY WITH DETAIL SKETCHES), F/C FLYING TECHNIQUES, R/C POWER AND SAILBOATING, AND MUCH MORE.

ACT NOW, BEFORE THEY'RE GONE FOR EVER!! PRICES: All issues prior to January, Ί 981 ...... $2 All issues January, 1981 and later ...... $2 ISSUES NO LONGER AVAILABLE Specify issues desired by month and year. Magazines FROM OUR STOCK: will be mailed Second Class, postpaid. Foreign orders (except APO and FPO) must add 6CW per copy. Allow Sept '71 (No.1) June '7 3 four weeks for delivery in US. If UPS shipment is des­ Feb. '7 2 May '7 6 ired, add $1.25 minimum for up to two magazines, or add $1.25 plus 35tí for each additional magazine on March/April '72 Dec. '7 7 orders for three or more. Remit by International Mon­ July - Dec. '7 2 O c t '7 8 ey Order or U.S. funds drawn on a U.S. bank for Over­ seas orders. Master Card or VISA accepted. Include Jan. - April '7 3 Dec. '7 8 card number, expiration date, and your signature. 621 West Nineteenth St.,Box 335,Costa Mesa,CA 92627-0132 Phone: (714) 645-8830 by paying homage to its environment, located east of the Mississippi. The Monoplane, is being removed from the the machines, and the men and women home office in Costa Mesa will continue next printing of our Full Size Plans list, whose efforts have thrust us toward the service (all right, you farmers, stop and the plan itself is no longer available final frontier.’ ” giggling!) current advertisers west of the through Model Builder. You may still It’s quite an honor to have an artist of Mississippi and overseas. obtain the plan, however, from Model & this caliber grace our cover with his CHANCE OF ADDRESS, AND... Allied Publications, Ltd., Box 35, Bridge work. Bob his agreed to do others for us, By the time this reaches you. Bill Street, Hemel Hempstead, Herts, HP1 hopefully coordinating subjects with Forrey, our new R/C Soaring columnist, 1EE, England. Ask for Plan No. FSP/567 construction articles, as occurred in the w ill have a new address. It is 1843 (as originally published in the November October issue. At some time in the Pomona Ave., Unit C, Costa Mesa, CA 1954 issue of Aeromodeller). The last future, limited edition full-size (22 x 28 92627. We don't know as yet what his known price, according to our MAP inches) litho prints, suitable for mount­ new phone number will be at home, but Plans Book, was 2.40 pounds British, plus ing and framing, will be made available. during normal 8 to 5 working hours, it 45 p for postage. Check your bank for These high quality reproductions will be will be (714) 645-8830. If that number current exchange rates. individually numbered and personally sounds familiar, it's because you may PETTIT PAINT POINTERS signed by Bob Benjamin. Estimated price have called Model Builder recently. Yes If you haven’t done so already, check is expected to be about $50. If this offer . . . Bill is becoming a regular member of Bob Underwood’s "1 to 1” R/C Scale this interests you, please drop us a note, or MB’s staff as of September 1, 1982 . . . month for information about mixing call, so we can determine the quantity not just to write the soaring column, of Pettit Paint Company’s Hobbypoxy required. course. He’ll be working into the posi­ paints to match specific military aircraft NOVOTNIK JOINS MB tion of Art Director, taking over some of colors. Arriving too late to add to his The model industry rumor mill is the duties now belonging to this writer, column, here are two more military faster than the speed of light, so the who will give them up without a fight! color formulas. following is already history to members NO CHANCE OF ADDRESS To get U.S. Navy Sea Blue, FS35402, as of that fraternity. However, for those of For Al Alman, that is. Perhaps they used in WW-II on Corsairs, Hellcats, etc., you who are "out of touch" .. . Al found out what he’srea//y like, or maybe mix three (3) parts H81 Black, two (2) Novotnik, a long-time member of the they don’t allow you to move up to parts H33 Stinson Green, and one (1) Model Airplane News staff, has joined Puyallup, Washington until you know part H24 Dark Blue. Model Builder Magazine as Advertising how to pronounce it. But in any event, For Intermediate Blue, FS35164, which Representative. Al will operate from his Al’s address, until further notice, remains was used in combination with Sea Blue home at 4 Beverly Place, Norwalk, CT at 2609 Burningtree Ct., in Arlington, in early WW-II three-color U.S. Navy 06850, and his Model Builder business Texas 76014. Hmmmm . . . maybe those camouflage schemes, mix four (4) parts phone is (203) 847-7478. June bugs took exception to his deroga­ H70 Gray, three (3) parts H66 Dark Red, While the world is his territory with tory comments and ate up the tires on and one (1) part H24 Dark Blue. respect to the solicitation and accept­ his VS bus! Of course, with both formulas, add an ance of new advertising, Al will also CHANCE OF PLANS equal quantity of Part B Flat Hardener render service to existing advertisers Our Plan No. 3824, the Blackburn for the proper matte finish. · 100 MODEL BUILDER IN THE BEST CIRCLES, IT’S ttber skivor

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