JANUARY 1984

volume 14, number 144

74820 08545 BYRON Dean Copeland and .^►„ORIGINALS Byron Originals winning CAP 21 hK. Ml G m i. lowi. ptl

FULLY AEROBATIC % SCALE C A P 21 1 9 8 2 N A T S WINNER AWARDED 3rd PLACE GIANT SCALE 1982 NATS NASA FLIGHT ACHIEVEMENT AWARD 1982 NATS QUALIFIED FOR SCALE MASTERS CHAMPIONSHIP

F a c to ry D ire c t $236°° Plus £ Q Λ Λ DELIVERY NOW! s hipp ing Featu Wings and Aileron Linkages. Aileron linkages automatically engage and Exclusive plug-in wings makes for easy VISA disengage with installation and removal of transport and storage. Simply loosen four w in g s . bolts to remove wing panel.

A Rare Blending of Value & Performance Experience true scale real­ FEATURES: In Complete Kit Form! ism and performance with minimal assembly time. • Highly detailed Byro-Foam components are indexed & ready for assembly

• Aircraft aluminum wing SPECIFICATIONS spars molded in position. •W ing Area - ► Unlimited aerobatic per­ 9 2 0 sq. in formance. All AMA FAI m a neuve rs. •Ready-to-fly w t. - • Spring aluminum land 1 5 lbs. ing gear designed to take abuse. • W in g S pan - 8 0 " • Durable, easy-to- repair Byro-foam construction. •W ing Loading - 37 oz. psf. • Exclusive plug­ in wings/aileron linkage •L e n g th - 6 5 "

• Decals includ­ •C h a n n e ls - 4 ed as shown ab ove. P o w e r - > Co m p le te Q uadra K it C o n ­ c e p t

BYRON ORIGINALS, P.0. BOX 279, IDA GROVE, IA. U S A. Ph. 71 2-364-31 65 Telex 439012 IDAG The catalog that even body's been talking about is now available at your favorite R C dealer. You’ll find 80 pages of color photos, complete descriptions, and all the technical information you need. It's the complete collection of all of 01 exciting lines.

Ifyour dealer doesn't have them in stock, ask him to g< you one from his distributor. Hut burn supply is limited, and this is one catalog you don't want to be w ithout.

ACCESSORIES

Look at our complete selection of accessories. High performance motors, special fittings, starters, quick chargers, propellers . . even thing you need. You'll even find an exciting line of sound effects generators for extra realism.

Check out our ' catalog and

turer I

delay. pick up your M O D E L S JANUARY 1984

BUILDER volume 14, number 144 621 West Nineteenth St., Box 10335, Costa Mesa, CA 92627-0132 Phone: (714) 645-8830

STAFF EDITOR/PUBLISHER TABLE OF CONTENTS Wm. C Northrop, Jr.

GENERAL MANAGER FEATURES Anita Northrop W O R K B E N C H , Bill Northrop...... 6 ASSISTANT GENERAL MANAGER Dawn Johnson DEAR J A K E ...... 6 PRODUCTION MANAGER O VER THE C O U N T E R ...... 7 Bill Forrey

ELECTRONICS CORNER ...... 11 PRODUCTION ARTIST SIG CUPPED W ING CUB REVIEW, Al Alman...... 12 Howard Millman ELOY'S BIG B IR D , PART 1, Eloy Marez...... 18 DRAWINGS BY Al Patterson R /C B O A T S , )erry Dunlap ...... 20 ACCOUNTING DEPT. MANAGER KRAFTKIT VAGABOND IN REVIEW, Dan Rutherford...... 22 Michael Whitney ELECTRIC POWER, Mitch Poling...... 24 SUBSCRIPTIONS R/C SOARING, Bill Forrey...... 28 Jo Anne Glenn H O W T O FLY PATTER N, Dick Hanson...... 32 CONTRIBUTING EDITORS PLUG SPARKS, John Pond ...... 33 Al Alman Eloy Marez Jerry Dunlap Walt Mooney BIG BIRDS, Al Alman...... 40 Bill Forrey Mitch Poling PLANES A N ’ FACTS A N ’ C H IC K U M T R A C K S , Fred Lehmberg...... 44 Bill Hannan John Pond R /C A U T O NEW S, Dan Rutherford...... 46 Dick Hanson Fernando Ramos Mike Hazel Dan Rutherford PYLON AT THE NATIONALS, John g . Smith...... 48 Ray Hostetler John Smith CH O PPER C H A T T E R , Ray Hostetler...... 50 Ken Johnson Bob Stalick H A N N A N ’S H A N G A R , Bill Hannan...... 54 Joe Klause FUEL LINES, Joe Klause...... 56 ADVERTISING REPRESENTATIVES FREE FLIG H T, BobStalick...... 57 Bill Northrop C /L S P E E D W A G O N , HaldeBolt...... 62 Home Office, Costa Mesa Al Novotnik 4 Beverly PI., Norwalk, CT 06850 Bus. Phone (203) 847-7478 SCALE VIEWS MODEL BUILDER (ISSN 0194 7079) is PeterW estburg...... BOEING F4B-4/-3, 60 published monthly by RCMB INC., 621 West 19th St.. Box 10335. Costa Mesa. California 92627-0132. Phone (714) 645-8830

CONSTRUCTION Subscriptions: $25.00 per year. $47.00 for SUNRISE 2540, Buzz Waltz...... 14 two years. Single copies $2.50. Subscriptions outside the US (except APO & FPO) $32.00 OHM-Y-GOSH, DaveKatagiri ...... 26 for one year only. All payments must be in US funds, drawn on a US bank. 1/2A BRIGIDIER O.T., Jim R eynolds...... 38 Copyright 1983 by RCMB INC. All rights MORDECAI MURPHY’S DART, Walt M o o n e y...... 51 reserved. Reproduction without permis­ sion prohibited.

Change ol address notices must be received six weeks before dale of issue that new COVER: The lovely lady gracing this month's cover is Karen Johnson, also known address takes effect. Send old address with as Miss Costa Mesa, California. Karen is holding up the tail end of Eloy Marez' CAP new: old label preferred Post Office will 20. the subject of a two-part "How To" article on putting together a large scale not forward copies unless you pay extra model with safety, reliability, and beauty as primary concerns. See "Eloy's Big postage. Duplicate issues cannot be sent. Bird. Part 1" starting on page 18. Kodachrome transparency by Eloy Marez. Second class postage paid at Costa Mesa. California, and additional offices. 2 MODEL BUILDER YOU CAN BE FLYING CHRISTMAS MORNING With One Of These Hot New A.R.F. Kits From Circus Hobbies

YOUR CHOICE OF: P51, Cessna or Mirage Kit with Engine and Circus IV Radio System with 2 Servos and Cox 400 Starting Kit All for Only $159.95 Dragonfly Engine $ The Dragonfly engine is optionally available 159.95 on request with P51 or Mirage Kit in place of Our New Kits Are A Snap the Black Widow engine. If you want a stunt Each of them assembles in minutes, tank and throttle control, the Dragonfly is just then simply install the airborne and what you’re looking for and if ordered at the fuel tank and you may be ready to fly same time as the kit, it is only $4.95 before the rest of the presents are additional. Supply is short so please hurry. unwrapped. Simplicity in assembly linked with high quality components CIRCUS IV like the Cox .049 engine and Circus With (2) 505 Servos IV radio system and you’ve got a 500 MAH Bauery Pack. Receiver, package that guarantees you’ll spend Switch Harness and Charger less time in the hangar and more time included. in the air. All Prices Subject to Change Without Notice Limited to Quantity on Hand. Offer Expires Jan. 31, 1984 Cox 400 Starting Kit

Additional servos with this offer $9.95 each (limited to 2).

Orders Only - Toll Free Customer Service and (800) 782-0022 Information (702) 732-0022

3132 S. Highland Dr., Las Vegas, NV 89109 Send $1.50 for Product Information Package ASTRO-HOG - What a name! What an airplane! This is the classic design that got R/C aerobatics off the ground. It was the first successful low winger, designed in 1957 by Fred Dunn. Astro-Hogs swept 1st. 2nd. 3rd and 4th place at the '58 Nationals. Model Airplane News proclaimed in mock disbelief, "An airplane to top anything so far in multi RC. OUT OF THIS WORLD MANEUVERABILITY. Good pilots do four point rolls - so help us!" And that was before proportional radios. Berkeley Models put out a kit and hundreds of fledgling R/C’ers learned to love the Astro-Hog's near perfect aerodynamics. Those ageless flight qualities are still perfect today. THIS MAY JUST BE THE ULTIMATE EVERYDAY R/C AIRPLANE. Its thick semi-symmetrical airfoil, gobs of wing area, and light wing loading make it a real workhorse and a pleasure to fly. The Astro-Hog will do anything you want to do, yet flies slow enough to let you enjoy it. Inside or outside loops, snap rolls, For .45 to .60 Engines spins either direction, and inverted flight are effortless. Sensational 71" Wingspan stability. Perfectly powered with an old, but still good, pre-schneurle .60, Wing Area: 824 Sq. In. like those you find at most club auctions. Or it's a real dreamboat with one of those quiet new 4-stokes. Weight: 7 - 7-1/4 Lbs. For a super enjoyable R/C experience, try an Astro-Hog. THERE'S NO THE ALL NEW OTHER AIRPLANE LIKE IT! A s t r o AN R/C LEGEND RETURNS

PRICE TO BE ANNOUNCED

SIG MFG. CO. owns the old Berkeley kit line. This modern version of the Astro-Hog is based on their factory plans and tooling and is a copy of the original design with the following Sig Kit Designed By MIKE GRETZ improvements...... * Easy-to-install strip ailerons instead of barndoors and bellcranks * Bolt-on wing mounting * Stab mounted on top of fuse instead of rubber banded to the bottom * Tricycle landing gear for perfect takeoffs and landings (Plans also show how to build original taildragger version.) * Simplified construction throughout PLUS THE USUAL STANDARD SIG KIT FEATURES......

See your dealer first! For direct orders, call toll free 800-247-5008. For mail orders, add $1.50 postage under $10.00. Over $10.00 postpaid. No C.O.D. - Send $2.00 for latest catalog. SIG MANUFACTURING CO., INC...... Montezuma, IA 50171

4 MODEL BUILDER - sig. BUY FROM AUTHORIZED SIG DEALERS ^ sig=t

GRAND JUNCTION QUINCY EAST LANSING NEW MEXICO OKLAHOMA BELLINGHAM CULLMAN Aero Rail Hobbies Quincy Hobby Center Rider's Hobby Shop ALBUQUERQUE OKLAHOMA CITY Hobby Hive Chart·/ * R/C Hobby Suppi·« 1141 N 25th St 3632 Maine 920 Trowbridge Road Valley Hobb«« Campbell's Hobby House 111 E Magnolia 601 5th St. S W Plara 25 ROCKFORD FARMINGTON 4522 4th St NW 3500 N MacArthur CASTLE ROCK PH 205 734 2402 GRAND JUNCTION Rockford Hobbi«. Inc Joe's Hobby Center. Inc PH 505 345 9688 TULSA Aero Motive Products HOMEWOOD The Hobby Hut 615 N Prospect Street 35203 Grand River Ave CARLSBAD House of Hobbes 607 Sp.nl Lake Highway Homewood Toy A Hobby 1125-27 N Ave WAUKEGAN PH 313-4778266 The Schettiers 6914 E Admiral Place KENT 2830 S 18th St CONNECTICUT Lake County Hobbes FARWELL 1009 N Eighth St OREGON Kent Hobby MOBILE BRISTOL 3102 N Sheridan Road Lockwood Aero 4 Hobby Shop NEW YORK CORVALLIS 1313 W I* D ix* Hobby Craft* Bristol Hobby Center. Inc. PH 312862-4544 3060 N County Line Road BROOKLYN Trump’s (DJ's) Hobb«« Suite 110. 4 3077 Dauphini Street 641 Farmington Ave INDIANA FLINT Brooklyn's Model Masters 1875 N W 9th St PUYALLUP MONTGOMERY Bristol Plara INDIANAPOLIS Rider’s Hobby Shop 1307 Gravesend Neck Road PH 503 753 7540 F irgrove Model Supply Modelers Supply PH 583-7273 Westside Hobby 3012 Corunna Road PH: 212-339-9250 PORTLAND 10611 136th St East (Mail Order Catalog Sales) DANBURY 5235 Rockville Road KALAMAZOO BROOKLYN Strictly R/C PH 845-7675 Bo* 7185 The Hobby Center IOWA Rider’s Hobby Shop Walt's Hobby Shop 7868 SW Capitol Highway SEATTLE PH 205 283-2634 366 Mam St COUNCIL BLUFFS 3417 So Westnedge 7909 5th Ave PENNSYLVANIA Webster Supply Co ALASKA GLASTONBURY Bud's Hobbies 4 Crafts LAPEER PH 212-745-4991 BATH 17818 Aurora Ave N ANCHORAGE Davis Hobbies 133 W Broadway Pipps Hobby 4 Toys DEPEW Dick Wetzel's Hobbes TACOMA Anchorage House of Hobbles Fox Run Mall DES MOINES 112 West Nepressmg St Depew Hobby Center 514 E Mam St Bill's Hobby Town 604 C Street 272 1043 NORWALK Iowa Service Company PONTIAC 5866 Transit Road PH: 2158378681 14914 Pacific Ave 4211 Spenard Road Al's Hobbies 2706 Beaver Ave RC Hobbies PH 684 5555 LANCASTER PH 206-5318111 3521 Mt View Drive 54 Chestnut Hill Road WATERLOO 921 Huron EAST ISLIP The Right Bo* WALLA WALLA 8225 Old Seward WATERFORD Bob's R/C Supply ROCHESTER Hobby World Lancaster Shopping Center Harley'S R C ANCHORAGE Shoreline Craft 432 Ardmore Treckside Hobbies 232 E Mam Street LANSOALE Route 1 Box 277A Diamond Center 5 Hayes St P.0 Box 222 KANSAS 418 Mam Street PH: 516-277-4499 Penn Veliey Hobby Ctr PH 509 529-2618 800 East Dimood Blvd PH 443 1458 KANSAS CITY SAGINAW ELMSFORO 837 W Mam St WEST VIRGINIA Suite 136 FLORIOA R/C HOBBIES Teit's Hobby Shop n Andy's Hobby Shop LEHIGHTON CHARLESTON ARIZONA CAPE CORAL 5620 State Ave C 326 Fashion Square Mall 36 Mam Street Carpenter Hobbes Fountain Hobby Center PHOENIX A A J Models. Inc LIBERAL SAULT ST MARIE KINGSTON Rt 5 Box 337 200 W Washington St. Exeter Hobb»s 1928 Del Prado Bhrd Milter s Bike 4 Hobby Shop Pinnacle Hobby Shop J 4 J's Hobbes. Inc MILTON WISCONSIN 3285 E McOowell Rd CAPE CORAL 105 E Seventh 129 E Portage Ave 785 Broadway Kreb's News tand MARSHFIELD PHOENIX Unde Bob's Country Store SALINA TAWAS CITY RICHMOND HILL 83 Broadway M 4 Wisconsin Hobby Center The Hobby Bench Hobby Supply Mr Hobby Great La k« Mode* 4 Mold Co. Wilson Hobby NAZARETH Northway Mall 19th Avenue & Northern 4730-0 SE 15th Ave Kraft Manor 412 M ario Street 104-40 Jamaica Ave Tramland U S A MENOMONIE PHOENIX PH 813-9450900 1857 South 9th TRAVERSE CITY ROCHESTER 105 Beividere Street True Value Hardware Hobby Bench CAPE CORAL WICHITA Ray's Radm/Controt Shop Dan's Crafts 4 Things PITTSBURGH 1512 9th Street Parad·*· Valley Mali Universal Hobbies The Hobby Shop 517 So Union 3S2 Empire Blvd BiU 4 Waft's Hobby Shop L Mart Shopping Ctr 4550 E Cactus Rd 9801 W Sample 954 South Oliver PH 616-947-4949 ROCHESTER 116 Sm.thtetd St MILWAUKEE SEDONA INTERLACHEN KENTUCKY UTICA G 4 G Hobb«« READING A «ln 1 Hobby My Hobby Shop Field's Hobby Shop. Inc. LEXJNGTON 1339 Dewey Ave Iron Hone Hobby House South Gale Man Smith s Comer Strickland Road X-Celi Models. Inc 2441 Auburn 60 South 6th St 333 So 27th Street ROCHESTER PH 602 282 1290 P O Bo* 1063 347 Eastland Shopping Ctr WARREN Panco Hobbes READING PH 4148454555 TUCSON LEESBURG PH 606-254-2406 Prop Shop HobbiM Ott's Hobbes 2676 East Ridge Road MILWAUKEE Tucson Hobby Shop Top Value Hobby LOUISIANA 23044 Van Dyke 536 N 10th St Casanova's Hobby 4352 E Speedway 2740 North Hwy 441-27 BATON ROUGE 1 Block N. of 9 Mile SYRACUSE SLATINGTON 1423 S MuskegoAve WICKENBURG Fruit land Park Plaza Hobby Town· WYANOOLLE Walt's Hobby 4 Craft Valley Hobbes 4 Collect lb e * PH 414872 2700 Lane's Toyiand A Hobbies MELBOURNE 3112 College Drive Suite A Stoner Hobby Center 4300 W Genesee St. 102 Mam Street WAUSAU 81 N Valentine Ernie's Hobby Shop MANDEVILLE 145 Meple St UTICA WARMINSTER Pope's Hobby Lend ARKANSAS 631 Aooilo 8>vd Mercury Hobbies, Inc PH: 313-283-2355 American Hobby 4 Sports J .C R/C Hobbes 640 South 3rd Ave FAYETTEVILLE MIAMI Rt 6 - Box 734A MINNESOTA 2107 Whitesboro Street 13 York Road CANADA ColHer's Air Crafts Crown Hobbies METAIRIE BEMIOJI PH 315-724-4959 PH 215872 5200 BAWLF. ALBERTA 1610 Foxhunter Road 7439 Coral Way M 4 M s Hobby Art 4 Craft Ctr Hobby Hutch NORTH CAROLINA WAYNE B 4 P Transport Ltd LITTLE ROCK MIAMI 5229 Veterans Blvd Paul Bunyan Mall CHARLOTTE Hyatt Hobby House Box 6 Shamil's House of Hobb·« Orange Blossom Hobbies. Inc NEW ORLEANS BLOOMINGTON Respcap Inc. - Scene· Hobbes Gateway Shopping Center PH 373-3953 3408 S University Ave 1975 N W 36th Street Pet 4 Hobby Center Jolly's Hobb·« 4 Crafts 2615 Central Ave PH 215887 2244 CALGARY ALBERTA Hall Plaza Shopping Center ORLANDO 4035 Touro Street 7935 Southtown Center EDEN RHODE ISLAND Hobby World Canada PH 562-8230 Bob's Hobby Center. Inc WESTWEGO CRYSTAL Coke's Fix it 4 Hobby Shop EAST PROVIDENCE Box 968 Stn V NORTH LITTLE ROCK 7333 Lake Underhill Road Clark's Hobby 4 Craft Center Crystal Schwinn Cycfery Rt 2 Box 222 A 4 R Hobb«« CALGARY. ALBERTA Madijo Hobby House PENSACOLA 729 Westbank Expressway 6324 Bast Lake Road PH 9198270166 56 Alee St P.M S Hobby O af! 4212 McArthur Drive Bobe's Hobby House MAINE DULUTH GREENSBORO PH 401 438-2754 Calgary North Hill Centre CALIFORNIA 5719 North W Street WATERVILLE Carrs Hobb«« Sports 4 Hobb«« Unlimited SOUTH CAROLINA WINNIPEG. MANITOBA BURBANK PLANTATION JFK Hobby 4 Craft Ctr Inc. 2014 West Superior Street 2144 Lawndale Drive GREENVILLE Cellar Dweller Hobby. Ltd T A A Hobby Lobby Universal Hobbies JFK Mall RICHFIELD Lawndale Shopping Center The Great Escape 1354 Mam St 3512 W Victory Blvd 141 South State Rom) 7 WESTBROOK Hub Hobby Center HENDERSONVILLE Pleasantburg Shopping Center PH 589 2037 COVINA POMPANO BEACH Castle's Hobby Center 16 W 66th Street The Hobby House Ph 803-235-8320 or 242 4229 WINNIPEG. MANITOBA 1211 Asheville Hwy Covina Hobby Center Trade N Hobbies Rte 302 597 Bridgton Road ST PAUL MYRTLE BEACH Gooch's Hobbies PH 6928683 140 N. Citrus 2159 S E 9th St MARYLAND Gulliver's Ed's Hobby Shoo 646 Portage Ave PH: 331 1910 PH 305 943-1997 WALDORF 1526 W Larpenteur HIGH POINT Hwy. 501 Next to Fanioy ST JOHN'S. NFID EL CAJON SARASOTA Berne's Craft 4 Hobbes. Inc Doug's Hobby Shoo ST PAUL TENNESSEE Capitol Hobby Centre. Ltd Mike's Model Shop 2291 English Road H 4 H Hobby Sales Waldorf Shopper's World Mac's Models. Inc KNOXVILLE 6 Freshwater Road 229 East Main KING 4121 $. Temiami MASSACHUSETTS 1326 N Rk* Street Tennessee Model Hobbes OUNOAS. ONTARIO FRESNO SOUTH DAYTONA AMES8URY PH 6124898060 King R/C Skycraft Hobb»« Inc OW Hwy 52 Rt 62 Oak Ridge Hwy · Sofwey Fresno Hobby A Crafts Ace Hobbes Goodwin s Photo 4 Hobby MISSISSIPPI PH 615 482 2900 139 York Road 3026 N O d e r Ave 2133 So Ridgwood Ave 30 Main Street BILOXI PH 983-3969 SCARBOROUGH. ONTARIO WINSTON-SALEM NASHVILLE FULLERTON PH 904 761 9780 BOSTON Chuck's Hobb«« The Toy Mart Toronto R-C Hobby California Model Supply TAMPA Eric Fuchs Hobbes 502 Edgewater Gulf Dr C-3 The Hobby Corner 1869 Lawrence Ave E 136Ό Oakwood Drive 113 Graylynn Drive 1056 South Brookhurst Farmers Sundries 4 Hobbies 28 Fremont Street PH 6013886346 PH 615-883-1648 PH 418755 1766 HAWTHORNE NORTH DAKOTA 4939 E Broadway BURLINGTON OXFORD TEXAS WILLOWDALE. ONTARIO PH 813-248-3314 GRAND FORKS Chuck's Model Shop Eric Fuchs Hobbes Creative Sources ARLINGTON Keith s Hobby Shop 14106 Hawthorne Blvd GEORGIA Burlington Mall 1010 Jackson Ave McGiftms Hobbes Unlimited 5205 Yonge St 1228 9th Ave S The Hobby Hub LAKEWOOD ALBANY CHICOPEE MISSOURI 903 A Pioneer Parkway West PH 2224721 Hobby Warehouse PH 701 772 5311 Lowell'S J 4 J Hobbes GRANDVIEW AUSTIN ANCIFNNE LORETTE. QUEBEC 4128 South Street 1601 N Slappey Blvd 133 Frontenac Street Flo Mow Co MINOT Pane Temp* Phoenix Aeroplane Factory HobbyShop J 4 J Hobbes LAKEWOOD PH 912-888-2095 PH 413-592-1472 700 Blue Ridge Ext. 610 Kenmston Or 1459 Notre Dame Jet Hangar Hobbies MARIETTA Mmot Inti. Airport EAST LONGMEADOW LEE'S SUMMIT CORPUS CHRIST I PH 4188724113 12554 Centralia Road WILLISTON Complete Model Supply Bill s Hobby Supples Blue Hiiles B«ke 4 Hike. Inc Leisure Time Hobbes ARVIDA QUEBEC PH 213-860-7612 West side Shopping Center Tn County Hobb·« 600 N Mam Street 229 S Mam 1326 Airline LeModeie Redu't Enr LIVERMORE 806 Sandtown Road 103 22nd St West PH: 413-736-7711 ST CHARLES DENTON 118 Mathias CP 341 Hobby Haven ROSWELL FITCHBURG Mark Twain Hobby 4 Craft OHIO PH 4185482136 BEAVERDAM Yeliowbird Hobbes 1756 First Street Tommy's Hobbies McMannus Hobbes 4 Novel 1355 S 5th 117 W Hickory HAUTE RIVE QUEBEC PH 415-443-5828 Buckeye Hobby Shop 1270 Alpharetta St 633 Mam St. St C hari« Shopping Center EL PASO Le Centre Du Modehste LOMITA Brannon Square 7940 LugabiH Road FRAMINGHAM NEVAOA Hal s Hobby Shop Allard 1223 Lestrat The Flying Machine Model Ct. SMYRNA Fisher R-C LAS VEGAS BERLIN HEIGHTS MONTREAL. QUEBEC 2441 S Narbonne Ave Danel's Hobbies No 57 Sunrise Center Hobby Junction 17 Salmi Road JJ.'S Hobby Den PH 915-755-1914 Can-Air Hobb·« MT VIEW 3260 South Cobb Drive 36 Center Street PEABODY 4972 S Maryland Parkway« FORT WORTH 5850 Goum Blvd Ouest San Antonio Hobby Shop VALDOSTA Enc Fuchs Hobbes NEW HAMPSHIRE CLEVELAND PH 514-332 3565 Sears Shopping Center The Hobby House. Inc Mott's Hobby Shop Jim's Hobby Shop Northshore Shopping Center KEENE 7241 Grapevine Highway SASKATOON. SASKATCH PH 415-941-1278 Northside Plara WORCESTER Leisure Time Mobbws 800 Huron Road Collins' Aero-Craft NORTHRIDGE CLEVELAND PH 817 2810921 PH 912 2448991 Ray's R/C Speciaftes 322 West Street HOUSTON 238 First Ave North Smith Brothers HAWAII National Hobby. Inc. 12 Sherman St. LITTLETON Clear Lake Models PH 6524775 8941 Reseda Blvd 5238 Ridge Road HONOLULU PH 757-5883 Hobby Land 117 Cammo S Shopping Ctr YORKTON. SASKATCH SACRAMENTO Hobbie tat FINDLAY WRENTHAM 101 Union Street PH: 713-488-6315 Radio Control Hobbi« Graphic Hobby House 1423 Tenth Avenue Jinx Model Supples 8's Tire 4 R/C Hobbes NEWINGTON HURST 39 Betts Ave 2610 Marconi Ave ILLINOIS 721 Rockwell Ave 383 Burnt Swamp Road Enc Fuchs Hobb«« Roy's Hobby Shop AUSTRALIA SAN BERNARDINO BELLVILLE PH 617 384-8237 LAKEWOOD Fox Run Mall 1309 Norwood SYONEY. N S W Harper's Hobby Shop West Side Hobby MICHIGAN Wmgs Hobby Shop Inc. NEW JERSEY SAN ANTONIO Pyrmont 2009 222 No. 0 St. 2629 West Mein Street 17112 Detroit Ave ANN ARBOR EDISON Clayton Hobb«« Burimex SAN FRANCISCO CHICAGO Rider's Hobby Shop C J R/C SUPPLY PH 221 5383 Franciscan Hobbies Stanton Hobby Shop LANCASTER 5707 E Mobud 137 Pyrmont Street 115 W Liberty 250 Plainfield Ave. UTAH 1935 Ocean Avenue 4734 N Milwaukee Ave Slater's Inc. PH (02)692 0694 BATTLE CREEK PH (201) 985 8660 OREM CRYSTAL LAKE Plara Shopping Center BRISBANE. QUEENSLAND SAN JOSE Hobby House MARLTON Miniature Aircraft Prod. Chuck Sheldon s Hobby Shop Frank's Barber Toy 4 Hobbies 1141 N Memorial Drive Underwood 4119 1035 W Territorial Rd Hi Fly HobbtaS 811 W 400 N 3157 Alum Rock 111-113 North Mam Street LIMA The Hobby Warehouse PH 964 9105 Route 70 4 Cropwell Road SALT LAKE CITY SANTA BARBARA PH 815-4590247 Callahan Hobbes 30 Kingston Road CADILLAC PH 609-983 8060 Douglas Models ENGLAND Atkins Hobbies GLENVIEW The Flight Center POMPTON PLAINS 1229 E. Elm St 2065 E 33rd South NORFOLK. NR17 IDG 14 W. Anapamu Street Nipper's Toy* 4 Hobbies 916 S Mitchell MANSFIELD Hobby Hut VERMONT Pegasus Mortals. Ltd PH 805963-3404 1314 Waukegan Road CLAWSON Top Flite 567 Route 23 SW ANTON Caston. Attleborough SANTA MONICA PH 312 7242040 Nick's Pet 4 Hobby PH 201-835-2077 15 N Mam The Hobby Shop C0LUM8IA. S AMERICA Evett's Model Shop McHENRY 1139 W 14-Mile Road PROSPECT RAMSEY RFO 1 Rt. 7 Aeromode tos Britannia Ltda 1636 Ocean Park Blvd The Hobby Hangar COLDWATER Hi-Way Hobby House Lighthouse Hobby Supply Co PH: 213-452-2720 5515 No Wilmot Road Hobby Heaven 507 E North Street PH 802 524-2715 Apartado (P.0 Box) 5 2 5 » Route 17 VIRGINIA Bogota 2. Columbia SANTA ROSA PH 312-497-3103 7 S. Monroe Street RANDOLPH TOLEDO ANNANDALE PH 212-7309 Toy & Model MURPHYSBORO PH 517 278-5894 The Hobby Stop Cart's Hobby Center Model Masters. Inc. NEW ZEALAND 711 Coddmgtown Mall RJ Hobby 4 Elec Center DEARBORN 508 Route 10 4907 Summit Street COLORADO 1508 Walnut Street WAPAKONETA 6920 Braddock Rd INVERCARSILL Joe's Hobby Center PH 201 366-4300 RICHMOND AURORA PH 618887 1981 7845 Wyoming Ave Deb's Toy Shop Model Shoo RED BANK The Hobby Center Tom Thumb Hobby Center OAKLAWN PH: 313-9338567 129 E. Auglaize St 55 Arcade Dm St Hobbymasters. Inc 1709 Willow Lawn Dr PH 89439 10718 E Colfax Pat's Hobbies 4 Crafts EAST DETROIT 62 Whit# Street YOUNGSTOWN WASHINGTON VENEZUELA PH: 303-3616159 5730 W 95th Street Joe's Hobby Center WALLINGTON Boardman Hobby Center BELLEVUE CARACAS 1070-A COLORADO SPRINGS PH 4248131 17900 E lOMiie Bednarr Servtcentar 6820 Market Street R/C Model Shop Hobby World. C A (D«st t Custom Hobbrn PH 313-733-8294 R/C Hobby Supples ZANESVILLE 2813 E Platte Ave Thompson Rade Supples 14020 N E 21st St. Apartado Postal 75054 356 Mam Ave PH 7479914 110 $ 6th Street PH: (02) 34 33 02

DEALERS: Write For Details On How Your Name Can Appear In This Column

JANUARY 1984 5 FLASH! 1983 FAI World Precision R/C Aerobatic Championship Pensacola, Florida INDIVIDUAL RESULTS

Dr. Gerald Seeman, President of the Associa­ 1. Hanno Pretner (Austria)...... 5814 tion for Unmanned Vehicle Systems, presents 2. Bertram Lossen the 1983 AUVS Pioneer Award to Maynard (West Germany) ...... 5659 Hill at the Annual Meeting of the Association 3. Dave Brown (United States)... 5613 in Salt Lake City, Utah. Maynard, a past pres­ ident of the AMA, is one of several aeromode! 4. Ivan Kristensen (Canada) ___ 5589 ers who has taken his R/C and modeling skills 5. Wolfgang Matt (Liechtenstein). 5519 with him into the real world of remote con­ 6. Yoichiro Akiba (Japan)...... 5417 trolled, unmanned vehicles for m ilitary and 7. Steve Helms (United States) .. 5395 /ro m civilian applications. TEAM RESULTS Bill Important note . . . we will continue to 1 United States...... 8092 produce the IMS (International Modeler 2. Japan ...... 7887 Show) in Pasadena, California, in the Northrop'* usual early January time slot. 3. West Germany...... 7872 “ HELLO, THIS IS DAN” 4. Canada ...... 7740 w o r k b e n c h We won't be hearing this cheerful 5. Austria ...... 7656 salutation when calling for Dan Lutz, of Kraft Systems, for quite sometime to involving bone graft, and has already RUMOR MILL come. Dan was recently involved in a had the knee cap rebuilt. Although no Various stories have been circulating head-on auto collision on his way to paralysis was evident at the beginning, around that (1) Model Builder has been work and suffered a broken neck and some has developed since the first sold to someone in Florida, (2) we have one badly shattered leg from the knee operation on his neck, though doctors sold Model Builder and are moving to up. He will go through a series of Florida, (3) we are moving to Florida and operations to rebuild his leg, probably taking Model Builder with us, and (4) Continued on page 104 we're moving to Florida but will con­ tinue to produce Model Builder in California. Of the above choices. No. 4 comes the closest to the facts. Being pretty hooked on living out our time on earth by the sea, we realized that we simply could not afford to retire, when the time comes, on the costly, limited shoreline of southern California. While spending time this summer with my ailing mother in Sarasota, Florida, we had the opportunity to examine the shoreline of the Gulf Coast of Florida in the Sarasota area, and discovered that real estate there is much more affordable now, but just beginning to take off in value as it did in southern California about 10 years ago. With the thought of future retirement, we de­ cided to purchase a home on the water in Sarasota and rent it until we are ready to move, which could be June of 1984. However, not wishing to burn bridges behind us, we will rent our home in ADVICE FOR THE PROPWORN Dear Jake: Newport Beach for about two years, just —By Jake I note with alarm that a beer company to make sure we haven’t put ourselves Dear lake: is sponsoring a model airplane show out on a limb that we don’t like. I've found that if you cut Odor Eater team. What’s our hobby coming to if a During that period, at least, we will shoe inserts into half inch strips, they purveyor of demon alcohol is allowed to keep Model Builder’s office in Costa make a great wing saddle sealed tape. associate with us? Something must be Mesa and operate it remotely, pretty Feel free to pass this helpful hint on to done! much as was done during May, June and your readers. —Appalled in Apalachicola July of 1983, when I had to be there with —Novel Idea in Nova Scotia my mother. It was during this three- Dear Novel Idea: Dear Appalled: month period that we discovered, with a Sounds like a winner! I bet it even I’ll drink to that. few improvements needed here and helps eliminate embarrassing under­ —Jake there, that it was possible to operate the wing B.O. (balsa odor). ★ ★ ★ magazine in absentia, with our fine —Jake office crew taking charge. ★ ★ ★ Continued on page 97 6 MODEL BUILDER OVER THE COUNTER 1 — r ~ · :■/:■/' ;: / .Tx: v;:x< /: . '-'■/ ■ '■ « + -:-:f fir, . r t ·■· .· |> :jx -ipf:f:f:f>r* M[;■/ .t \:k > My:::y - / ■ A m ·:^ m - ■'■'■■::J ' > : .'··:·:·:·<:· : . χ·χ ·χ ·χ .·χ>'χ:;: ; x s.·;.·;./.; f ýýiýýy, * a r /&■: & & & . sssul

All 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.

• Ace R/C, Inc., never restson its laurels when it comes to keeping its customers supplied with the latest in electronic hardware. It seems that Ace is always expanding or improving its product line. This month we have four new gizmos that you are going to want to check out pretty thoroughly. First on the list is the Ace Voltmaster. The Voltmaster is not just another ESV. Jeep In order for the readings given by an Quarter-scale A rt Chester from Coverite. ESV to be valid, the unit MUST be ticated, precision device which is as . . . 1200 mah and up . .. can be moni­ precise and accurate. Most ESV’s cur­ accurate as any expensive laboratory tored with validity. rently on the market are off by 0.1-volt unit. You can be confident that the Take the guesswork out of using an which can make a tremendous differ­ readings it gives are true. ESV ... use a Voltmaster. ence when critcal levels are being The Voltmaster very precisely mea­ The second new product from Ace is monitored. The Voltmaster is a sophis- sures transmitter and receiver battery the Overnighter. Tne Overnighter is a voltage while it is under load to deter­ unique DC to DC multiple output mine whether the battery is reaching a charger for use in field or automobile discharged state. Green, yellow, and red charging your transmittersand receivers. scales indicate a go-caution-no go How many times have you dinged situation. Unique features include four your scale or pattern bird carrying it in voltage ranges (including 12-volt for the motel room so you could charge it starter batteries), a Load Engage switch . . . have you had to sleep on the floor so to m onitor the recovery rate of the cells the plane could have the bed? (an important parameter in determining No longer do you have to find an cell condition), plus a Load Status switch outlet to charge up. The Overnighter so two different loads (200 ma and 500 charges either one or two transmitter 8 ma) can be engaged so that large packs cell packs and one or two receiver 4 cell

Satellite City Hot Shot Refill, 6 OZ. bottle. Radio Controlled Models (RAM) Big Battery Cycler.

JANUARY 1984 7 tit

Quarter Midget Pylon racer from Jim Deyoung. packs from your 12-volt car battery. Both or large capacity packs are no problem. receiver charge rates are individually Finally, we come to the number four programmable at 25, 50, 90, or 120 ma, new product, the Dual Metered Vari- the overnight rate for 250 to 1200 mah Charger. This is the most versatile batteries. Both transmitter outputs can charger you’ll find! The DMVC has two be set at 50 or 90 ma for standard or SR variable outputs, both of which can batteries. produce up to 250 ma so you can charge Perfect for any modeler who travels two one to ten cell packs from 100 mah Replica Orwick .64, Klause and McCollum. and flys. Can be permanently mounted, to 2500 mah capacity. Perfect for stan­ or remain portable, in your van, RV, or dard receiver and transmitter packs, SR For more information, write to Satel­ trailer to provice even more conveni­ packs, or large packs with 1200-2500 mah lite City, P.O. Box 836, Simi, CA 93062- ence than at home because of the cells. Will also charge your 12-volt 0836, or call (805) 522-0062. multiple outputs. A fully regulated, starting battery. ★ ★ ★ constant current device so if the vehicle A meter accurately measures the Altech Marketing, of Fords, New engine is running it w on’t be affected. current being produced on either out­ Jersey, welcomes the addition of a LED’s indicate proper charge and on puts so you don’t risk overcharge. marine version of the 60 Four-Cycle condition. NOTE: the 12-volt source For more information, write or call engine made by Enya. The water jacket battery should be of high capacity such Ace R/C, Inc., P.O. Box 511,116 W. 19th around the cylinder fins of the crankcase as a car battery. St., Higginsville, MO 64037, (816) provides adequate cooling for this The third new product in the Ace 584-7121. engine even when it is installed below lineup is the Chargemaster multiple ★ ★ ★ the deck of a model cabin cruiser. The output charger for use with standard AC Satellite City announces a new six- high torque output allows the modeler house current. It charges up to two ounce, economy size refill for your Hot to use large propellers on his boat, transmitters and four receivers simul­ Shot pump spray. The six-ounce bottle providing realistic speeds and excellent taneously overnight. The charge rate is will refill your Hot Shot cyanoacrylate fuel economy. programmable up to a 120 ma current. accelerator twice . .. and save you a The characteristic exhaust of this Also, the Chargemaster can be switched dollar in the deal. engine is authentic-sounding, yet low in to a trickle rate for continuous charging. The Hot Shot Economy Refill comes overall noise output, which will add to Leave your batteries on trickle charge single-boxed for $6.95. Ask for it at the pleasure of running this engine. The indefinitely and you will always be ready your local hobby shop. If you need to shrouds over the valves and pushrods to fly at a moment’s notice. LEDs will order it, ask for Satellite City catalog help to keep the water out. You’ll also monitor proper operation. SR batteries item No. HS-6. appreciate the choke assembly which

.-.ulL

• * 1 **■.' S.· ; i ·.·.·.· L_ t U X—* ON 1 DC TO DC CHARGE1 1 1------1 OVERNIGHT STATUS _ 1 CHARGER 0N

1 |A(K K/C.lnc.| 1—RX— 1 ■ _____ C ^ J

. — '» s c m o N ttv

e

Ace R/C, Inc. assorted new products: (left to right) Voltmaster, Overnighter, DMVC, and Charge Master. Everything for any charging application.

8 MODEL BUILDER LEFT & ABOVE: New at Wilshire Model Center, Sanyo "C utoff" Ni-Cds for electric power. Compare size with sub-C cells (left) and A A cells (above). the Simple Cycler for smaller packs. that has all the power you need for The Big Battery Cycler deep dis­ limited engine run contest work or just charges your battery packs to the manu­ sport flying. At $5.75 per cell, they are a delivers easier starting. Get your hands facturer’s recommended minimum vol­ real bargain for the flier looking for that on the Enya 60 Four-Cycle M arine tage level for safety. You can easily competitive edge. engine at your neighborhood hobby determine the percentage of charge Contact Wilshire Model Center, 3006 shop. If he doesn’t have one, get your used and remaining in your pack, as well Wilshire Blvd., Santa Monica, CA 90403, dealer to order one from Altech M arket­ as getting an early indication of cell (213) 828-9362, for further information. ing for you, and get your boat out of failure. ★ ★ ★ drydock fast! The Big Battery Cycler is available at Attention Old Timer fliers! Klause and The specifications for the Enya 60 your local hobby dealer for only $24.95. McCollum (Replica Model Engines) Four-Cycle Marine R/C engine are: For more information regarding this or announces the availability of replica. displacement, .60 cu. in.; bore and other US-made Ram products, send Orwick .64 ignition engines. These are stroke, 0.945 x 0.866 inches; bearings, SASE. exact copies of the engine produced by two (jail bearings on crankshaft; car- j ★ ★ ★ Henry Orwick in the “ mid-1940s.” As buretion, Enya G-type, 5.7mm intake; While we’re on the subject of things they are .64 cu. in. displacement en­ cylinder liner and piston material, steel electric . .. Wilshire Model Center has gines and were designed prior to 1950, liner, ringed aluminum piston; weight, some new batteries in stock that electric these engines may be used in SAM Class 21 ounces: power, 0.9 hp; and rpm power enthusiasts are going to go crazy C contests (both F/F and R/C Assist). range, 2,700 to 11,500. over. We speak of the new Sanyo Red Each engine comes with its own For further information on the new Cutoff Cells. handsome, custom, wooden case, to­ Enya 60 Four Cycle Marine R/C engine, Sanyo Red Cutoff Cells are a little gether with a presentation grade contact Enya Model Products Co., P.O. larger in diameter than AA-sizecells,yet descriptive brochure. All engines are Box 286, Fords, NJ 08863. Phone: (201) they are the same length. Rated at 800 serialized, and are superbly finished. 572-5792. mah capacity and weighing only 7-1/2 The price of these classic Orwick .64 ★ ★ ★ ounces for a six-cell pack (a six-cell, replicas is $250.00 (plus $5.00 for in­ Radio Controlled Models, Inc., 4736 sub-C pack weighs 11 ounces) you can sured, first class mail shipment within N. Milwaukee Ave., Chicago, IL 60630, see how the electric power flier would the US, California sales include 6% tax). also known as Ram. has announced the benefit when faced with a limited motor For further information, contact Joe release of another handy, miniaturized run contest format. Unlike AA cells, battery cycler . . . this time for large these Cutoff cells can handle the high capacity, 4.8-volt receiver packs . .. that current loads of competition motors. has the same accuracy and efficiency as What this all adds up to is a lighter model

Associated Off-Road motor (No. 6500).

Associated Modified Ó-R (No. 6510, 6511).

JANUARY 1984 9 B&R Hobbies glow plug starter, rechargeable.

short duration races. Not recommended Enya .60 four-cycle marine R/C engine. for general road-course, off-road racing. Klause, Klause and McCollum, P.O. Box • High torque band for off-road use. Contact Associated for more infor­ 3255, Laguna Hills, CA 92653, (714) • ROAR and ORRCA legal. mation. Associated Electrics, Inc., 1928 830-5162. Associated’s Reedy Modified Off- East Edinger, Santa Ana, CA 92705, ★ ★ ★ Road Competition Motors are for all- (714) 547-4986. It’s your turn electric off-road R/C car out off-road competition. Both motors ★ ★ ★ racers! Associated announces its newest have the following features: Contact Cannon R/C Systems, 13400- electric motors for your enjoyment. • Latest wind for best performance. 26 Saticoy St., No. Hollywood, CA 91605, Associated’s Off-Road Stock M otor • Magnets super zapped for maxi­ if those neat-looking, new G-Mark (part No. 6500) is based on the Yokomo, mum strength. engines caught your eye! What you saw as used at the 1982 World Champion­ • External brush and spring assembly were Cannon’s latest offerings for R/C, ships, Stock Class. This off-road motor is for easy replacement. glow powered aircraft . .. the G-Mark built to specifications developed by • Adjustable brush timing with timing .15 Single is a .15 cu. in., 6.3-ounce, front Mike Reedy, and features the following: gauge on motor. rotary valve, Schneurle ported, ball • Wind: 28 turns of 22 gauge wire. • Broken-in and tim ing dyno set. bearing, slide carburetor, integral • State of the art ceramic magnets. • High torque special fo ro ff road use. muffler (boy, that’s a lot of adjectives!), • Remagnetized in Reedy’s motor lab • ROAR and ORRCA legal. two-stroke engine. The G-Mark ,30Twin for maximum strength. The Model 6570 is a standard modified has all of the features of the .15 Single, • Broken in and tested prior to ship­ race motor developed to give best all but it is obviously different by virtue of ment. around performance needed to win. its second cylinder. The going price on • External brush and spring assembly The M odel 6577 is a “ Sprint” model. for easy replacement. Developed for dirt track oval racing or Continued on page 102

New G-Mark .15 Single imported by Cannon R/C Systems. New G-Mark .30 Twin imported by Cannon R/C Systems.

10 MODEL BUILDER L3 3 3

Q1 By ELOY MAREZ

AIRBORNE GLOW PLUG the starting period. Apparently, a little POWER SUPPLY FOR TWINS less electrical heat combined with the The larger the airplane, the more natural heat from combustion is enough important it is to keep that fan up front to keep things turning merrily along. Two-volt sealed battery as recommended for turning until the wheels touch the For twins, a perfectly adequate glow glow plug idle power for twins. Cells are the ground. One of the ways to insure your- plug power source is a two-volt, sealed the same size as other D cell types, but differ internally. Note manner of connection also self from that unwanted flameout, lead acid battery, more commonly differs from Deeds. Weight is approximately especially during extended periods of referred by us R/C’ers as a "Gel Cell” , six ounces. idling, is to apply some current to the which is actually the trade name for such plug (or plugs) during that time. I have batteries manufactured by Globe Battery cylinder engine. They are a sealed found that somewhat less than the rated Division of Johnson Controls. Remem­ battery, which makes them useful in this one and a half volts is necessary for this ber, these are not Ni-Cds, which have a application, with a nominal cell voltage purpose, as the heating demands from rated voltage of 1.25, and which are ade­ of 2.0 volts. The smallest size made is a D- the plug are less while idling than during quate (and recommended) for asingle- cell size; the normal, large flashlight size, with a 2.5 amp rating. A single cell, used to light two glow plugs connected in series, will thus apply one volt to each plug, enough to cause it to glow dimly but adequately, for between one and two hours, depending on the plugs used. As most of us only use this feature during idle, this should be more than necessary for any single day's activities. A diagram of the wiring is furnished Circuit used in providing glow plug power to twin cylinder glow engine during idle. Two-volt for those of you with a brand new twin cell is activated by throttle servo. Switch is positioned for "o ff" during charging, engine off. and little experience with it. Naturally, the microswitch is actuated by the throttle servo, and set to cut in just above where the engine seems to run more reliably and smoothly with the application of glow plug current. A capacity chart is also enclosed so you can calculate the exact operating time avail­ able with your particular engine and plugs. Any switch with a rating of at least one amp will do the trick. To the best of my knowledge, these cells are not available through normal hobby channels, but they are in common use outside the hobby field, largely in the alarm industry, and are readily avail­ able from electronic suppliers and mail order houses. As they are apparently changed after a certain period in alarm systems, they are mostly unused, and have been trickle charged all the time. They are available practically new and in excellent condition for unbelievably low prices. I recently purchased a 12-volt

Continued on page 64

JANUARY 1984 11 SIG’s CUPPED WING CUB

By AL ALMAN ... Model Builder's The author poses with his new pride and joy, a Sig Clipped Wing Cub. Red and blue paint "BIG Birds" columnist reviews the scheme is a refreshing change of pace from more "standard" colors. Sig Clipped Wing Cub, a quarter- into a mighty fine airplane. This is what plete; not only does it contain the usual scale version of possibly the most Sig wants you to believe so they’ll sell goodies, but Sig has wisely included a widely recognized and famous more Scale Cubs .. . and after framing good, leaf-spring tailwheel, a sturdy of all mass-produced aircraft of all up two of these birds, and completing cowl and dummy engine, and 4-40 rods time. If the Piper Cub brings back one, I can tell you straight out that they and clevises (clevii?). the memories for you, maybe this are not lying. Mike Gretz did a superior And all the information you might job, design-wise, and Sig, in turn, put the ossibly need is found in the instruction should be your next modelling effort into making it a first class offering. ooklet, or on one of the four-pages of project.... The 31-page building and flying booklet easy-to-read plans. . .which include the contains 109 photos, seven drawings, templates for the windshield and the • Still find it hard to believe that in 45 and very good instructions, and the struts. On the last page, just prior to years of modeling, this is my very first booklet, by the way, is full-sized, like this flying instructions (which are good) Sig Piper Cub. Sure, I’ve turned out other magazine page; no squinting or magni­ spells out why each model must be indi­ puddle jumpers, like Champs, Taylor- fying glass needed in order to read tiny vidually balanced; common sense to crafts, Porterfields and such . . . but print or to make out the detail in some modelers, but surely a revelation never a Piper, which is kinda strange shrunken photos. They'veeven included to many others. considering that I learned to fly in what an informative two pages about “ The I want to point out right here that this probably was the first of the (somewhat) Clipped-Wing Cub Story,” with photos, birdie builds as easily as any of the clipped-wing Cubs back in '43. and made a color photo pack available “ smaller greasy kid stuff” you’ve ever As a matter of fact, this review includes as an option for those who want, or must done . . . except that she’s a couple of a number of other firsts, also. Seems as have, the scale documentation. tads bigger. There's nothing new or though I’ve never gotten around to You’re gonna have to search hard to different or radical about the Cub’s con­ building any other Sig kits, either, even find any hardware package more com­ struction, and is therefore a pleasure to though Glenn and Hazel started doing business in Montezuma 31 years ago. And it’s not that I’ve been a total stranger to Sig’s planes, having test flown countless Kadets and Kavaliers . . . and even acquired my own “ Bolt,” MiniPlane and Kougar through some “ wheelin' and dealin’.” But this was my first Sig kit from start to finish. And for a change I somehow managed to build this bird absolutely according to the instructions. Like most folks, I usually do a number of things “ my way,’’ but I found that this time I didn't haveto exercise superhuman restraint and discipline to keep everything stock. This BIG Sig is designed well enough that I had no doubt about the integrity or strength of any part of the airframe. There was just no need to modify. . . . Big boxes full of BIG Birds are not un­ common anymore, so the Cub kit didn’t look so huge to me.. . although the UPS person thought it was quite an armful (she was well under five feet and couldn’t have weighed 80 pounds soaking wet). It stands to reason that no manufac­ turer is going to belittle his product.and Sig is no exception; naturally their ad reads as though they’ve come up with a To some, cutting out the ailerons may very well be the most "radical" part of the building. mighty fine kit that can be transformed The 1/4-scale model builds just like a smaller R/C aircraft, well-suited for beginners.

12 MODEL BUILDER up with a noticeably spackled finish. Naturally this type of finish brought about endless questions from modelers and non-modelers alike . . . but by keeping a straight face when explaining that the "bumps” were needed for ta ­ bulation and better boundary layer control, I’ve been able to both save face and bring practical, hands-on aeronau­ tical engineering to the masses. Too many authors tell you that con­ struction is straight-forward . . . and then contradict themselves by citing an almost endless number of exceptions. Sig’s BIG Cub really is as straightforward as a kit (large or small) can be. so even Soooo nice and stable . . . a peachy bird for anyone to learn on .. . the Clipped Wing Cub someone brand new to modelingshould seemed to be perfectly matched w ith a Magnum .91S and Top Flight 16-6. find it an enjoyable challenge . . . and not end up frustrated and angry with a work on. Part of this enjoyment came S tuff fo r all construction, the b ird jigsaw puzzle that has missing, poorly from the good die cutting and good grossed out at only 14-1/2 pounds. I use fitting or hard-to-find parts. That’s one selection of wood I found in my kit . . . the word “ only” because after she was of the many reasons why I feel that the and the quality was so consistent that I all ready to go in her traditional coat of Sig Cub would make an ideal first flying did not have to balance the plane Cub Yellow, I suddenly(?) decided that I machine for anyone getting into BIG laterally; the weights of the left and right must have a different color scheme. By Birds, or R/C in general. After learning wing panels of the framed-up, one- the time I got through screwing around basic skills while working on this air­ piece wing were in complete agreement with inconsistent and sputtering spray plane, the new guy ends up with a very with each other. cans, and an old, senile Badger Airbrush realistic looking and flying aircraft .. . Thanks to the exclusive use of Hot (which I promptly threw out), I ended and that's what much of the “ BIG Bird magic” is all about. These larger planes lend themselves so well to more of a scale look, that the only honorable thing to do is to go that "extra mile” and take the time to add detail. (I can’t believe this is me extolling the virtues of scale RIGHT: The Magnum .91S four-jtroke ... but don’t worry, I still haven’t suc­ looks like a brute and runs like one, cumbed to the bite of the scale bug. I too .. . lots of power! Position of the don’t think I’ll ever be able to spend needle valve proved inaccessible with precious flying hours putting on thou­ cowl on. Didn't really need adjusting, sands of rivets or hundreds of panel however. Author rigged up a glow plug lines. My less-than-world-class cockpit power system with a wheel collar act­ ing as plug clip . See " H o w to F ly interior and dummy engine do the job Pattern" on page 32 for alternate for me, ’cause all / need is an acceptable method. Ground wire goes to mount­ 30-40 foot way-stand-off scale aircraft.) ing lug. Silicone rubber seals wires at Of course another part of the “ magic” is bottom. Radio Shack mini-plug is in­ to fly your biggie in a realistic manner; side small box on firewall. no Saturn-Rocket takeoffs or 85 “G” turns allowed. I mentioned that this review included a number of firsts, but only spelled out half of them; here, then, are the other BELOW: Here's the usual "bare three happenings. . . . bones" all-framed-up photo. Con­ struction is basic, easy. A good instruc­ In regards to covering, I used lerry tion booklet comes with the kit. Nice Nelson and Company’s new, lightweight feature for inexperienced builders. Ceconite . . . and it's the first time I’ve ever messed with an iron-on that didn’t have its own adhesive. It's sort of easy to get spoiled and start taking things for granted, and that’s what happened to my thinking about coverings. Most of the stuff sold in hobby shops has its own heat activated adhesive, so using any­ thing else seems to be double the work and the cost. . . and this is accompanied by the feeling that a manufacturer’s got one helluva lot of nerve expecting meto use a product that w on’t stick to anything without outside help. Well, after quelling most of my preju­ dices about adhesiveless iron-ons, I pro­ ceeded to cover the Cub ... securing the Ceconite to the airframe three different ways. On the wings I used Nelson’s "Super Seam” straight from the can, and without any prior coats of

Con tinued on page 65

JANUARY 1984 13 By BUZZ WALTZ . . . The Sunrise 2540 is a fundamental, four-channel R/C trainer. If you want versatility in a design, you've found it . . . the Sunrise 2540 can be flown with anything from a .25 to a .40 cubic inch glow motor, and built with either a flat bottom or semi-symmetrical airfoil. • My sole purpose in designing the Sun­ the hardware section are not available at made a master rib, I lay the master on my rise 2540 low wing trainer was that I am a your hobby shop, have the owner sub­ sheet of 3/32 balsa and cut out each rib Sunday fun flyer and I like to fly low and stitute them with parts of another brand using an Uber Skiver knife with a No. 11 slow as well as being able to do basic and similar quality. blade. aerobatic maneuvers when I want to. I constructed the airplane using Satel­ Take two pieces of wax paper and put With the flat bottom airfoil, the Sunrise lite City Hot Stuff Super “ T” and Hot them over the plans. This protects the does both of these things well. Shot spray. On the firewall and landing plans and prevents the parts from stick­ Some of the important features in the gear mount and wing dihedral braces I ing to both the plans and the building design of this airplane are that you can used five-minute epoxy. surface after they have been glued use any power selection that you wish For your convenience, I have included together. from a .25 to a .40 engine (hence the a list of balsa and plywood materials that As I have previously mentioned, both name). However, I designed the air­ you will need to finish your Sunrise 2540. wing panels may be built on the plans at plane around the HB .25 engine. The HB You might want to look it over after you the same time. .25 engine provides plenty of power as have read the building instructions. Take your 1/16 x 3-inch sheet material well as the economy of using a no-nitro WING CONSTRUCTION and cut two sheets exactly in half length­ engine. As you will see while you are The wing construction is very simple, wise to give you four pieces 1/16 x 1-1/2 building the wing, it is strong enough to and you can build both wing panels on X 36. This is your top and bottom trailing take a .40 engine if you wish to do so. the plans at the same time. As the wing edge material. You are now ready to The fuselage is wide enough to ac­ has a flat bottom airfoil, there is no need start building the wing. commodate any radio gear that you for a special wing jig, thus building time Pin the 1/16 x 1-1/2 x 36 trailing edge might want to install. is much shorter. You will need a building piece in place on the plans. With a Another feature that I have incorpo­ surface such as a flat table or workbench pencil, draw a line 3/16 of an inch from rated into the design is the use of a Dural and a Celotex ceiling panel (for sticking the aft edge of this sheet along the edge. main gear rather than the conventional pins into) for the top of the table. This is a guide line for gluing on the 1/4 x wire landing gear which is always The first step in building the wings is to 1 tapered trailing edge piece. See plans mounted into the wing. I have always cut out the wing ribs. Using three sheets for detail. liked the Dural gear and felt it isstronger of 3/32 X 3 X 36-inch balsa sheet, cut out Using a wing rib as a gauge, butt the and much easier to mount floats to at a 20 ribs. I do this by first making a master back of the rib up to the trailing edge later date for water flying. rib out of some scrap 1/8 ply that I have piece and pin the bottom leading edge The wing and fuselage are constructed laying around the shop. I cut out the rib piece into place. Again using the rib as a of balsa and plywood. The wood to pattern from the plan, and I glue it to the guage, glue into place the top leading make this airplane should be readily 1/8 ply using 3M spray cement. Then, I edge piece (3/8 x 3/4) making sure that available from your local hobby shop. cut out the rib and the various notches the 3/4-inch side is in the upright If some of the parts that I have listed in with my Dremel jig saw. Now that I have position. See plans for detail.

14 MODEL BUILDER

ABOVE: Bottom view of the Sunrise 2540 reveals its clean lines, simple structure.

LEFT: Empennage details. Ele­ vato r and rudder are made fro m 3/16 sheet balsa, and are designed to swing free of each other. Note elevator pushrod exit is fuselage rear.

RIGHT: Servo installation details. Note wing hold down blocks.

Now cut and glue into place the 1/16 x sheet, cut cross-grain your shear webs dihedral braces. 1/4 balsa cap strips. Also at this time, cut that go between the top and bottom Your next step will be to join the wings and glue into place the 1/16 balsa center spars. A good way to determine the together. Remove both wing panels section sheeting. This is made from a height of the shear webs is to use one of from the plans, then trial fit the two 1/16 X 3-inch sheet. Make sure that these the ribs as a gauge. Now glue in the centers together to determine how pieces are cut cross-grain. shear webs. When the shear webs have much sanding will be needed to have Now glue the bottom wing spar (1/4 x dried, glue in the top spar (1/4 x 1/4). the pieces fit flush with each other. This 1/2) into place along with the ribs. Glue Trim any excess wood from the tips of is done at this time. After the two pieces in all ribs except the center two. These the wing and cut your two wing tip fit perfectly flush, block up each tip are glued into place after the wings are blocks from a piece of 1/2 x 3-inch balsa 1-3/4 inches and sand the centers again joined together and the dihedral braces sheet and glue them into place. so that they fit perfectly flush and are epoxied into place. While everything is drying, this would Using a piece of 3/16 x 3-inch balsa be a good lime to cut your two 1/16 ply Con tinued on page 68

The H.B. .25 engine provides plenty of power fo r the Sunrise. A 9-5 Zinger prop was used on a u thor's plane. Oural landing gear is used for easy conversion to floats. Plenty of beefy shear webbing used.

16 MODEL BUILDER JANUARY 1984 BIG Bird PART ONE By ELOY MAREZ . . . Eloy's BIG Bird is in reality a German-made CAP 20, but don't think this article is a product review on the airplane kit . . . What you are about to read is one man's idea of what products and hardware should go into a BIG Bird when performance, safety, and reliability are FIRST!

• Well, I finally came around! When the large R/C model movement started to gather momentum. I would read about them, and look at them, and think things like: “ Well. I guess they are OK, but it’s not for me.” Possibly some of my reluc­ tance at that time was due to the fact that a lot of the earlier large models in this part of the country were hangar queens, great examples of design and workman­ ship, but rarely if ever flown. I just couldn't see all that work going into a display model . . . I gave up "solid” models as a child the day I finally got it all together and watched my first successful rubber powered airplane climb up and fly ! The acquisition of a Rocket ’46 engine later on d e fin ite ly ended all interest in non-flying models of any type. However, the last few years have seen almost a complete end to non-flying Eloy's Big Bird is in reality a CAP 20 in 3/10-scale from a G. Metterhausen kit. All building biggies around Southern California,and techniques and accessories that went into this plane are described in the text. an increase in my interest. The gang has lower half. The CAP-21, the latest of the I do not want to write so much about definitely come out of the closet, garage, series is most easily identified by its fuse­ the model itself, as I would like to share or wherever, urging their large creations lage mounted landing gear, a la Cessna: with you some of the techniques, mate­ to do what R/C modeling is all about, fly. both models of the -20 have wing rials, and new products that I discovered After some experience with a Great mounted fixed gear. during this, my first exposure to a big Planes Cosmic Wind, a terrific flying air­ My airplane, a "Metterhausen” CAP- “ BIG Bird.” It is my hope that it’ll bring plane, though something of a small big 20, is from a small German company, and your first takeoff roll with a similar bird, I was hooked and ready to tackle unavailable here in the U.S., so I won’t project not only sooner, but faster and the big time! spend too much time discussing it. Basi­ easier. My choice was one of the most beauti­ cally though, it is 3/10th scale, it has 1450 ENGINE ful meant-to-be-modeled low-wingers square inches of wing area at 88 in. wing­ In the firm belief that it’s what’s up around, a French CAP-20. This should span. and mine, ready to fly, weighs in at front that counts, let’s start with the not be confused with the CAP-20L, 19-3/4 pounds. It has an epoxy-glass power plant used. My choice for this which is a much better-known airplane fuselage, foam core wing and tail sur­ project was another West German prod­ here in the U.S., the CAP-20 is the prede­ faces. and was extremely easy and fast to uct, the Kavan FK-50, distributed here in cessor of the 20L, and was designed as a build. In fact, from picking it up at the U.S. of A. by World Engines, in Cin­ trainer and sport machine, while the Customs to its first test hop was around cinnati. This engine has met with mixed latter is intended for aerobatic competi­ three months, which amazed all my responses in this country, generally tion. There are many differences, but friends, as I am known as a rather slow starting with, “ W ow.” and ending up the easiest to spot is the completely builder. I kept thinking to myself that I with, "That’s much too pretty to fly.” rounded rudder on the -20; the -20L has must be forgetting something as the True, nobody who has seen this 1/4- a perfectly straight trailing edge on the project was moving along so quickly. scale, two-cylinder version of a "C onti-

Eloy's two-way fuselage stand allows easy transportation and storage (left) and on-field setup convenience (right). Neat and simple!

18 MODEL BUILDER ConvtreJoo Metric to Inc*

With the cowling removed from the CAP-20, the fine workmanship of the Kavan FK-50 is evident. It flies the 19-3/4 pound CAP-20 realistically and with complete authority. The FK-50 is a two-cylinder, four-stroke "Continental” . Note rocker arm details. Note dimensions (right). MARK I nental” light plane engine can deny that (3.0 ci), the overall dimensions are the external workmanship is flawless, shown in the enclosed sketch. The beautiful in fact, and for those so in­ weight of theengine is 2450grams (5-1/2 thread known as a “ buttress” thread, clined. it deserves the place of honor in pounds), and it is rated at 4.1 horse­ more commonly used in attaching bar­ any engine display. However, the Kavan power. The maximum recommended rels to firearms. The overhead valves are FK-50 is not just another pretty face, it is RPM is 8000. Bore and stroke are 34mm rocker arm operated, in turn worked by built to run and fly, and the impressive (1.338 in.) and 28mm (1.102 in.) respec­ cam operated pushrods, as in full-sized external workmanship is also found tively. Internally, we find a 15mm (.59 in.) aircraft engine practice. An accessory internally. crankshaft supported in three places by gear section in the rear drives the valve The FK-50 is a two-cylinder, four­ heavy ball bearings. The aluminum cam. oil pump cam, and will later include cycle, overhead valve, alternate cylinder pistons have two rings, a top compres­ the electronic ignition system pickup. firing, glow engine. An ignition system is sion ring, and a lower oil scraper ring, all The prop is attached with a heavy 8mm in the works, and will be available later riding in a steel cylinder. The head is at­ in the year. The displacement is 50cc tached with a special pressure sealing Con tinued on page 71

The receiver of choice for the CAP-20 project was the Kraft KPR-8 The radio compartment of the CAP-20. Shows dual elevator FM narrow band, dual conversion unit shown here. Solid control! servo arrangement for flight safety.

JANUARY 1984 19 R/C POWER BOATS R.O.W. With Buzz Waltz’ R/C Designs Begin-Air Trainer and Floats!

• What’s going on here? Is Dunlap trading in his boats for floats? The answer to that question is both "n o "a nd "yes.” After nearly twenty years to I* churning up lakes, ponds,and rivers, I’m not ready to place the model boats in storage. On the other hand, after all those years in model boating, it's most enjoyable to know you are capable of doing other things with a radio system than just beating around the buoys. WHY FLY? Do you enjoy challenges? I believe that most of us . .. because we have an interest in models, be they airplanes, boats, or cars .. . enjoy the challenge of doing something with our models. When I first became interested in the R/C aspect of model boating back in the mid 60s, there was really much more emphasis on the aircraft aspect of radio control. Although I wasn’t interested in A new dimension in R/C boating . .. UP! . . . with the Begin-Air Trainer on floats. R/C flying back then, I was fascinated by things radio controlled planes were built some R/C gliders. After the gliders, engines are less expensive, and will capable of doing. About that time. Dr. I did another .40 trainer and a .10- operate very well on fuel costing half of Ralph Brooks was the World Champion powered sport job. what it takes to make a racing engine in R/C pattern flying. I spent hours I only bring up this rather boring howl. watching Ralph wring out his stunt account of my past flying experiences to Isn’t the name Buzz appropriate for planes at one of the local R/C fields. point out that it is possible to participate someone who flies and sells model I cannot remember which year I first in more than just one aspect of radio aircraft? I had the opportunity to talk started R/C flying ... it was either 1973 control. I know of many model boaters with Buzz Waltz at the 1983 Northwest or 1974. The original reason I got into the who also enjoy sport flying R/C aircraft. Model Exposition when he dropped by model aircraft aspect of this hobby was I’m a serious model boater. I’m a sport the Model Builder booth while I was to help a junior model boater who flyer. I don’t run my model race boats manning the station. We got to chatting, wanted to try R/C flying. As I was his except to improve the performance or and I mentioned that I’d always been sponsor, we had the necessary radio enter races. Radio control flying pro­ interested in giving flying off water a equipment and engine. He built a vides a different type of challenge. shot. When Buzz offered me the oppor­ Falcon 56, installed our Veco 19 and Flying offers me an opportunity to keep tunity to build and review his Begin-Air Kraft three-channel. We learned how to my skills at a high level and not create Trainer and float kit I gladly accepted. fly with lotsof help from our local hobby extra wear on my competition boats. THE BEGIN-AIR TRAINER dealer. Bob Pfeiffer. Actually, it wasn’t as Once you master the rudiments of As the kit w on’t be found at your local difficult as I thought it might be. After R/C flying, I believe it is less expensive hobby shop, you may obtain one directly seven or eight years of model boating, than R/C boating. Assuming you’re not from Buzz Waltz R/C Designs, 255 North I’d mastered two out of the three neces­ constantly crashing, the engines last El Cielo, Suite 476, Palm Springs, CA sary control functions to fly motor, longer, and so do the glow plugs. The 92262-6914. The cost of the kit is $39.95, rudder, and elevator. After learning on the Falcon 56, I built a couple of .19- powered sport planes using three chan­ nels, and then built a four-channel plane powered by a .40-size engine. Then, I

Buzz Wsltz kits these very functional R/C air­ craft floats seen here ready for covering. Float construction is simple, but effective. Materials used are balsa and hardwood.

20 MODEL BUILDER Included in the kit are hinges, landing gear, control horns, wheel axles, and a motor mount for a .29-size motor. The printed construction instructions are very complete, and they are keyed to two blueprint type pages of illustrations of various construction phases. You could conceivably build the plane just from the illustrations, if you had previous experience with this type of model construction. The actual assembly of the Begin-Air Trainer is typical of model aircraft using box-like fuselage construction tech­ niques. The full-size plans provide all the necessary information for frame locations and reinforcement material. The wing halves are built over the plans. The wing section is a flat bottom airfoil. I don’t plan to give a piece-by-piece account of the construction of the Begin-Air Trainer. In a kit like this there are lots of oieces. The use of super glues like Hot Stuff, Zap, Jet, etc., helps speed up the building process. I find that I prefer the thicker glues like Hot Stuff Super *T' on balsa construction because The Begin-Air Trainer on takeoff roll (?), in flight, and on final approach over water. it doesn’t run off the parts as easily as the thinner glues. However, depending on the glueing application, both thick and thin super glues are handy. WHY BUILD A BALSA KIT? With so many nice looking, good flying, almost ready to fly foam and plastic airplanes available, the question of building a wood kit model is worth exploring. To lead you to believe that building a model like the Begin-Air Trainer is not time consuming would not be truthful reporting. Building a kit does take time. An individual who does not enjoy time spent assembling a model would be rather foolish to invest in a kit Lots of room inside the fuselage for the Futaba radio. Note battery pack and receiver aircraft. You are better off with an ARF mounted in foam and wrapped in plastic bags. model if time is a concern. Personally, I receive a great amount of and $3.50 will cover the cost of shipping. how narrow the box was when I con­ satisfaction from the time I spend in the The kit is very reasonably priced com­ sidered the completed size of the model. actual building of a model. For me, there pared to similar types of model airplanes. The money saved by using this narrow is a feeling of accomplishment in taking One cost saving item is the box in which box without fancy labeling is passed what initially seems like hundreds of the topgrade, band saw cut components on to the buyer. After all, you fly what’s are contained. I was really surprised at in the box . . . not the box and pretty Continued on page 75

ABOVE: A K&B .40 provides plenty of power for the Begin Air-Trainer. M odel is covered with Coverite and trimmed in Mono- kote and striping tape.

L E F T : The Begin-Air's fuselage is box-like and strong. The wing is built-up and likewise very strong.

JANUARY 1984 21 VAGABOND 40 By DAN RUTHERFORD . . . "D irty" Dan gives it to you straight in this review of Kraft's Vagabond 40 pattern plane. If you are desirous of learning how to fly aerobatic maneuvers with precision and grace, this may be the flying machine for you. What else but a Kraft KP5K radio for the K ra ft K it Vagabond?

• I’m not known for wishy-washy articles about products . . . if I had trouble, I’ll tell you instead of ignoring the problem. 1 have recently become semi-seriously interested in Pattern flying. I am not an expert level flier; and as I only care about what works, I don’t have much tolerance for “ foof.” Late last winter I decided a try at some Pattern flying would be interesting. I had been flying a Quickie 500 type of model and a Warlock 40, neither of which delivered much in the way of smooth, solid performance; pretty good for the usual "junk flying” where you just slap the sticks around, but it was becoming obvious to me that the real skill was in doing what appears to be simple maneu­ vers accurately and in the same spot in the sky each and every time. Three consecutive loops, for example. Any­ body with most any type of model can perform the maneuver in at least a recognizable fashion. Fly straight and level, pull up ... and wait. Easy. But that is junk flying. I wanted to place all three loops right on top of each "D irty Dan" Rutherford jigns V for victory . . . and for Vagabond! No Dan, it's not a Delta car! other, bottoms at the same altitude (real low!), to enter and exit the maneuver As for what is in the kit, the plans are problems building the model. But when right on the money. The models I had on neatly done, and the model can be built the instructions said to install the tank hand simply were too limited ... or using them alone. In fact, in a couple floor, I didn’t, knowing (from experi­ were limiting me . .. same thing. cases should be, ignoring the written ence) that the triangle stock backing up Looking around, the Kraftkit line instructions. Yes, there is a mistake or the firewall would then be impossible to caught my eye, especially the Vagabond two in the short-and-to-the-point in­ install. 40. Not an all-out Pattern model with structions. And there is very little elab­ While that may be a little picky, pipe, retracts, and such, but a fairly oration on construction hints, equip­ especially considering the fact that many simple model featuring built-up all ment installation, etc. I suppose the Vagabonds have been and will be built wood construction (which I prefer over assumption is that by the time you get with total disregard for the instructions, foam), a healthy tail moment arm, around to building a model likethis,you a little caution is advised. There are a double-taper wing construction, sym­ should already know what you are couple construction techniques (well metrical airfoil... and Joe Bridi’s name doing. Fair enough, but I continually see illustrated with clear, although small, right there on the box. Nothing like a modelers who build a model like the pictures) that I personally don’t use. For solid reputation for designing good Vagabond as their third or fourth effort, instance, the leading edge sheeting is flying models to use the kicker. The and if they have started in the hobby added to the ribs prior to the installation Vagabond 40 has a strong resemblance “ cold,” no previous experience at all, of the leading edge itself. I suppose that to the Super Kaos series, highly recom­ they do in fact need some extra help. works, but I like to have the leading mended by many where I fly. For what it’s worth, I didn’t have any edge stuck in there just to keep every-

22 MODEL BUILDER PRODUCTS IN USE

L E F T : The Vagabond's tail feathers are constructed from sheet wood. The author has a table model jig saw and loves to cut lightening holes!

BELOW: Radiosystem installation. Every­ thing to the rear for balance!

L E F T : Y ou see, it does f i t ! C.B. two-inch spinner. Mas­ ter Airscrew propeller, and Kraft motor mount (No. 200-206). Author perma­ nently installed tank when he chose to eliminate the hatch. The idea was to get maximum rigidity in nose.

BELOW: Stock rib doublers are 1/16 ply, but author chose to use 1/64 p ly in ­ stead. H o t S tu ff was used to adhere 3/4-ounce F/G cloth to balsa wing sheet­ ing. Note drill starts to lighten gear blocks.

LEFT: Tight fit! A .60-size Kraft mount is a tight squeeze in the Vagabond's nose. The Fox .45 is not exactly petite, e ith e r!

thing lined up perfectly. The installation pieces are machined; there is no die wood anyway, instead, I whittled out of sheeting locks in the structure, and I cutting in this kit, an extra that is always fuselage sides from 1/8 x 48 stock (kit want all the ribs as straight as possible. welcome. Even so, a few pieces did not pieces are 3/16). Whatever works for you.. . match the plans. The fuse sides in More of a "problem ” was the fact that The overall auality of the wood was particular were off considerably, there in each wing panel at least two ribs were what I would call above average. Always was just no way to arrange the three or too short at the trailing edge. They wanting to build as light as possible, I did four pieces making up each fuselage weren’t off by much as a small scrap use some wood from the "private stock” side and have it match the plan just right. easily filled the gap and corrected the shelf, but most modelers would be quite Actually, this wasn’t a problem for me, as situation. happy with the kit wood. All the wood I had never intended to use the stock Continued on page 75

JANUARY 1984 23 and do the detail work later. It is a big plane of 67 inches span, 1200 square inches of wing area, 7-1/2 lbs. all up, 12% semi-symmetrical airfoil, with a Jomar speed control running a Keller 50/24SL motor with one flux ring. Twenty sub-C cells were used, driving an 11-7 prop at 8000 rpm. Heinz commented that there were By MITCH POLING several Jomar throttles at the field, and they all worked very well. Heinz doubled the leads on the printed circuit board going to the MOSFETs with buswire to carry the heavy current (I would guess about 20 amperes). This is very impres­ sive performance for the Jomar, the big samarium cobalt motors are really the ultimate test for a speed controller. Joe Utasi (Jomar) says that he will be coming out with a heavy duty speed controller for the big cobalt motors in a month or two. It will use four MOSFETs and will • We have two electric fun flies to out, in fact, Heinz says it was the most weigh just under two ounces. report on: The KRC and the Boeing powerful glider at the field. I can believe The Jomar throttle is handy because its Hawks. First, the KRC, as reported by that, I have a Keller 50/24 motor, and it cooling plate can be made part of the Heinz Koerner. Unfortunately, Heinz is "awesome". By the way, the Keller fuselage. The throttle pulses at 7000 Hz, had only colorprints, and I didn’t get motors are now available in the U.S., which gives the motor a high pitch "around tuit” to convert them, so I'll they are distributed by Leisure Elec­ sound on start up. Apparently, the have to forgo photos of the KRC event. tronics. You might contact them for Ampere Flyer (the European electric Heinz says that the number of model­ prices. power newsletter) reported this as 50 ers in attendance is always increasing, Don Scrull brought his electric Sparky, Hz, which caused some to worry that the and I can believe it. His picture of the which featured excellent workmanship. throttle could cause demagnetizing of lineup looked a lot like the ones I have Don used a Carrera folding prop with inexpensive motors. Frankly, I have taken at the Astro Flight Champs, which added blade area so that it had the shape never heard of any such problem with is always a big contest. They had entrants of a rubber band prop. From the sketch any speed controller, but I suppose it is from as far away as Canada and Florida, Heinz sent, it looks like Don extended more fun to find something to worry Heinz said. Only the MB writer was the blades about 30%. and likewise with about, especially if everything goes too missing! Well, I was in Alaska at the time. the chord, for an increase of 80% more well! Heinz, but next year I just might turn up! blade area (per blade). Don says it is The flux ring mentioned earlier, by John Grigg, the AMA president, much more efficient than the original the way, is a steel ring that slips on over showed up at 6:30 a.m. (I agree John, it’s prop. Heinz did not say, but I am sure the motor. It serves to confine the the best time to fly!) with two entries, that Don did the extension with balsa. magnetic field more (holds it closer to the Electricus with an Astro cobalt 05 Heinz did several demonstration the motor), which gives more torque with seven cells, and a Gemini (a Euro­ flights with his Udet Flamingo biplane. and less current demand under load. pean design?) with a Keller 50/24 on 14 Heinz hadn’t finished the detail work on Without the ring, the motor will turn at sub-C cells. This one had a 14-inch Geist it yet, but, as he says, that is the advan­ higher rpm, on smaller props, with, of folding prop, with a very rapid climb- tage of electrics, you can fly them first course, more current demand. Thus, the

Bernard Cawley and his Schoolboy . . . no, he's not trying to start Bernard Cawley, again, this time controlling his Showmaster fro m an engine . . . only trying to figure out wha-happen'd to receiver. the ground. Rain finally stopped at Boeing Hawks contest. (Klees.)

24 MODEL BUILDER Bill Kubiak shows us the original "old tim er" design which he built. Note the 11-7, all-balsa, The new Leisure Off-Road motor makes an hand carved prop. Nice mount for the Astro belt drive. excellent aircraft motor. Brush setup is the best type .. . pig tail and spring loaded. same motor can be used with the ring to Anyhow, Heinz says his biplane takes turn a large prop on a scale or sport off in 25 to 75 feet from grass, depending started, and the humidity got very high, plane, or without the ring to turn a on the headwind. Its performance is so the flying was curtailed. On Sunday, smaller prop on a speed or pylon plane, good enough to encourage Heinz to go the wind was down, it was 89°F and less without changing the battery pack ahead with his other project, his four- humid, so there was more flying. arrangement. motor Lockheed Constellation which Heinz was also the clinic director. The Such rings make a noticeable differ­ has been on display at two of the KRC windier it gets, the more people go to ence on powerful magnets like the meets. It has the same area as the the clinic, and Heinz got some help this cobalt ones, but less so on the ferrite Flamingo, but it will have more lift due year. Don Le Gower took care of elec­ magnets (regular motors). I see about to its flat-bottom airfoil. tronics, and Heinz’s son Adrian took half an ampere difference on regular Heinz also flew his Olympic II with a care of general repairs and replace­ magnets, I have not measured cobalt Mabuchi 550 motor on eight sub-C cells, ments. Bob Kopski held flight seminars motors with and without rings, so I can’t 3.3:1 reduction, with a 15-inch Carrera with questions and answers. Some of the say how much difference there is for folding prop; and his four-m otor (020) problems that came up in the KRC clinic those. plane. This one did wingover turns to please the crowd. After that, the wind Continued on page 100

RIGHT: Electric model of French util­ ity plane, the MH1521 Broussard. Beautiful w orkm anship is obvious upon close inspection.

Bernard's Schoolboy innards. S22 servos are a nice fit as well as being a good servo at a good price. Upper servo operates microswitch, low­ Bruce Klees, of Anchorage, Alaska, poses with his Omni transmitter and Super Sniffer w ith er servos operate elevator, and rudder. (Klees.) Astro 035. Bruce is the electric expert in the frozen north.

JANUARY 1984 25 The Boeing Hawks 1st Annual Electric Race (1982) saw quite a few Ohm-Y-Gosh models flown by: (top, left to right) Don Shepard, Bill Smith, Bill Warner, Dave Katagiri, and (bottom, OHM-Y-GOSH left to right) Mitch Poling, Ben Almojuela. and Bernard Cawley. By DAVE KATAGIRI . . . Here is a popular 05 electric racer and fun plane that has really "taken o ff" in the Pacific North­ west It has a 300 sq. in. wing area and a very fast 15 oz. wing loading. Why not start a one-design race in your area?

• Ohm-Y-Gosh is an electric powered, Cox 6-4 grey plastic prop performed two-channel sport racer and interme­ the best with these systems. diate aileron-elevator aerobatic flyer. Several prototypes were made by The clever name for the model was a local flyers which were powered with ABOVE: Bill Smith poses with his Ohm -Y- contribution from Avis Cawley, wife of the Leisure Competition system using Gosh which features a neat air scoop. Bernard Cawley, of the Boeing "Hawks'’ six cells. Flight duration with this system BELOW: Dave Katagiri with original model. R/C club. The model began as a simple is about five minutes of high perfor­ Large stab yields excellent pitch stability. test vehicle on which to experiment with mance flight. As an audible loss in rpm the second generation “ 05" electric begins, the motor should be shut off. flight systems. The design also satisfied The Pattern wind motor will run a two other objectives: one was to develop couple of minutes longer, but with less a new club event (not that we don’t have performance. enough already), and the other was to A switch-off with down elevator have an aerobatic sport flyer that could proved simple and adequate. A roller be used in several local fields where coaster maneuver consisting of a pitch- engine noise would otherwise prevent up followed by a quick full down will their use. shut the motor off. Ohm-Y-Gosh is sized for the 05 flight The Ohrr-V-Cos/i design is based on a systems that employ six or seven 1.2 wing of 300 square inches to set the wing amp-hour cells. Leisure Electronics loading at 15 ounces per square foot. At offers the 601 (Pattern) and 602 (Com­ this loading, the gliding performance is petition) flight systems. Astro Flight has similar to that of a 200 square inch 1/2A its 05XL system as w ell as the new model. Where it differs from the latter is Challenger (cobalt) 05 system. None of in power loading. Its performance is these systems includes a safety fuse short of its glow engine counterpart; which is highly recommended. Four however, Ohm-Y-Gosh will cruise at 58 fuses were blown by the author while mph when powered with the Leisure logging 70 Mights which certainly saved a Competition flight system (six-cell). This motor or prevented a fire in each case. A is a very respectable speed considering 20 amp fuse was used satisfactorily for all that it is an average two-way level entry systems except the 05 cobalt on seven cells which required a 25 amp fuse. The Continued on page 79

26 JANUARY 1984

By BILL FORREY PHOTOS BY THE AUTHOR

11th ANNUAL FALL SOARING FESTIVAL The first weekend of last October was reserved on my calendar just for the above named big event. The Fall Soaring Tom Copp took top honors at this year's Fall Festival (FSF) is hosted every year by the Soaring Festival hosted by the CVRC in Visal­ Central Valley Radio Control dub (or ia, Calif. He flew this aileron Sagitta 650. simply, the CVRC). The flying site for the FSF this year, as it has been for the last minutes. couple of years, was the CVRC home The runway landing was thrown in to field, just a few miles outside of the town encourage “ scale-like” landings. A • Major R/C soaring events can be as of Visalia, in California’s San Joaquin quick look at the photos this month will much a social happening as a sporting Valley. reveal a few non-scale-like approaches one. If you've ever been to a multi-club I won’t bore you with a lot of blow-by- and “ dorks.” For the most part, the fliers or multi-state contest, you know what blow descriptions of who did what and did have scale-like landings, if your used I'm talking about. The exchange of when, but I would like to highlight a few your imagination! My favorite landing ideas, such as building tips, flying tech­ of the more memorable things that went was Ed Case's one-point landing with his niques, weather phenomena, etc., is as down at the FSF. Bird of Time. . . or should I say 100-point important to this glider guider as the The contest format was a T4 thermal landing! improvement in flying skills brought duration with a runway landing. T4 is I would never have believed that a about by the actual competition. Friend­ basically a “ 15-minute add-’em-up” four-foot by sixteen-foot strip of grass ships started and renewed at the big contest where the fliers try to complete would be so hard to hit! No, the sixteen- events can be as exciting and fun as any­ three flights for a total of exactly 15 foot dimension wasn't the runway’s thing else. All of these are convincing minutes. A point-per-second penalty is length, it was the 100-point section's reasons for attending and competing given for flights over or under the magic width, as it was for the entire runway...... but throw in a barbeque, a troup of 15 minute mark, but the flier has his The runway was sectioned off into 100, belly dancers, and the biggest trophies option of just how long each flight can 75, and 50-point strips, each one succes­ you ever saw, and you come up with an be up to his last flight. The only limitation sively larger and easier to achieve, but irresistable combination! is that no flight may exceed seven also more embarrassing! To qualify for the “ humble pie” 25-point landing, all one had to do was hit the field and manage to stay out of the launching area and pits! To add insult to possible ego- injury, the fliers were required to pass

Tom Brightbill, winner of the 1983 Hi John­ Keith Kindrick is always a contender for the Dave Johnson, Portland, Oregon, took third son Memorial Trophy, flew this beautiful number one spot. He flies a beautiful, multi­ place w ith his Dodgson Camano. He flies the Saratoga Windsong very well. E-214 airfoil. c o lo r Gemini M TS (Bame 253515 section). E-205 version. Colors: white. It. blue. navy.

28 MODEL BUILDER Larry Jolly launches Dennis Brandt's colorful Pantera into the sky. Hold it right there. Col. Bob Thacker, I have to load my camera! Three Davey Systems Retrievers were present (only two were used Note hard working winch personnel .... consistently) to launch 135 pilots in six rounds, finishing early! BELOW: Beauty event contenders line up for judging. through a "gate” of foam rubber pad­ ded fishing rod blanks with bright orange flags. These were placed in front of the runway and eight feet wider than the runway .. . that's a total of 32 feet separating the poles .. . but wouldn’t you know, several very well schooled pilots managed to impede their forward progress on those blasted things! Just ask Larry Jolly! The contest format was very low-key and very fun. If I were a beginner, I would not feel intimidated by it at all. The pressure is off until the last round by which time the "jitters” are pretty well gone, and you are enjoying yourself! No lift on your first flight? Don’t sweat it! team flier), Larry Jolly (repeat Nats Thacker (whatta guy!), and MANY, You have two more flights! If your club winner, Larry Jolly Model Products), MANY MORE! In case you didn’t notice, hasn’t tried this format, I’d recommend John Brown, Jr. (repeat Nats winner). these gentlemen came from as far away it as a good one for those newcomers to Bob Dodgson (Dodgson Designs, second as Seattle, Washington, and San Diego, try. Break ’em in easy! place finisher in 1983 Nats, Unlimited California. Now, as for who was there ... well, Class), Tom Brightbill (highest three- Mark Smith brought his newest design 135 fliers showed up with sailplanes to fly class point winner at the 1983 Nats, Hi to the FSF, and I had the opportunity to and the money to pay for the entry ($15). Johnson Mem. Trophy), Dave Johnson time for him on one of his flights with his Among them were the more renowned (repeat winner in Northwest Champs), as yet un-named craft. Needless to say, west coast fliers by virtue of their Jerry Arana (repeat RCM Trophy Race Mark flew beautifully, as he always does, abilities or status as manufacturers: winner), Rich Spicer, Dennis Brandt, Al but beyond his skills as a pilot, that Mark Smith (Mark's Models, US FAI/F3B and Keith Kindrick, Al Doig, Col. Bob darned sailplane looked good! By that I

Steve George, of Visalia, zeroes in on a 100-point landing with his modified Paragon. Five Rich Spicer demo's his glider's dive brakes, runways were chalked out on the field. Scoring went 100, 75, 50, and 25 points. Original design featured pylon mounted wing.

JANUARY 1983 29 Lutmi Enterprise's Lewis Clark poses with the Hijinks multi-task Dennis Brandt poses with his Beauty Event winning Pantera. The sailplane. Model flies very well, and looks nice! plane was basically red with orange, yellow, white, silver, black trim.

Ed Case made this rather funny looking “ scale-like'* landing with Dell Henry did a masterful job of CDing 135 pilots with help from the very good results ... 100 points! Model is the Bird of Time. CVRCclub. Bigger pilot turnout than the Nats! Very nice trophies!

mean aeslhetically and aerodynamically new generation soaring machine ring need to land them. Now, just because I it looked good. It is your typical three- because I’m sure his new design will be included a photo of Larry knocking over channel AMA thermal plane with a few very competitive. Unofficial word is that one of the “ gates” on one of his ap­ twists: its polyhedral wings are constant Mark is shooting for a December or proaches doesn’t contradict what I’ve taper in plan form, it has carbon fiber January release date. just said . . . if you had seen the incred­ spars, it has a fiberglass fuselage,spoilers Larry Jolly was also there, but not with ible sink that he had just flown through, for glide path control, all-moving hori­ prototypes. He flew his new Unlimited and if you had been in Larry’s shoes, you zontal stabilizer, and (oh yes) it has fully Class Meteor, and I commandeered his probably would have tried to cut short sheeted wings. Keep in mind that what I personal competition Standard Class your base leg too and tried desperately saw was only a prototype, and as you Pantera. Both models are winners in the to make your final! Larry wasn’t alone in very well know, prototypes aren’t always truest sense of the word: they handle, his desperation, three other sailplanes waht the kits are. I do find it encouraging they cover ground, they thermal, and got caught in the same sinking, stinking, that Mark has entered the multi-task. they are very controllable when you “ downer" and landed out . . . never

An embarrasing moment for one of the world's premier pilots. Larry Bob Dodgson demonstrates a rather steep approach with his Wind- Jolly tips the gate flag in front of the runway. Heavy sink got him! song. With flaps down and ailerons up, the plane can be "aimed".

30 MODEL BUILDER SECTION COORDINATES even getting close to the runway! HQ- 2.5/8 As I said, I commandeered Larry’s X 0.00 .005 .012 .025 .050 .100 .150 .200 .250 .300 .350 .400 .500 .600 .700 .800 .850 .900 .950 1.00 Yu 0.00 . 008 . 013 . 021 .031 .043 . 051 .057 .060 . 062 .064 .063 .061 .054 . 044 . 031 .023 . 016 . 007 0.00 Pantera for this contest, and what a VI 0.00 -.004 -.007 -.009-.011 -.014 -.015 -.016 -.016 -.016 -.016 -.015 -.011 -.006 -.000 .003 .004 .004 . 002 0.00 sweetheart it is to fly! If you have ever flown a really nice handling sailplane (I HQ- 2.5/9 prefer the Paragon as a . . . paragon . . .) X SAME AS ABOVE Yu 0.00 .009 .015 .023 .034 .047 .056 .061 .065 .067 .069 .068 .066 .058 .047 .032 .024 .017 .008 0.00 you will immediately feel and recognize Yl 0.00 . 004 -.008 .011 -.014 -.017-.020 .021 -.021 .021 -.021 -.019 .016-.010 .003 - 001 -.003 . 003 .002 0.00 the same qualities in the Pantera. How­ ever, put the nose down and LOOK T m boundary layer tranaitlon FIG.1 S. · boundary layer aeparation OUT! The Pantera will gladly eat up the U - upper aurface real estate for you. L - lower aurlace

In this type of contest, or any type of / contest where a bonus landing is part of — Re= 50000 s . u , the format, glide path control becomes —100 000 / c , ( o ) ' very important. Winners don't miss very — 200 00 0 many 90 to 100-point landings. What I HQ-2.5/8 like best about the Pantera is its wonder- r fully balanced feel while under the s o / influence of its spoilers. With the balance os- Separation bubbla warning cja) Λ Δ upper aurface oi point right under thespar,there isavery V lower aurface mild and predictable pitch change when T l you pop the spoilers to full deflection. S’ (The nose tends to point down.) If you -μ-f- deploy them slowly ... on a count of I I I io is 10/ 20 05 one, two, three . . . the pitch change is likewise very gradual, and you can slow T - boundary layer tranaitlon it down with a little up stick very easily. FIG.2 $ - boundary layer aeparation U - upper aurlace Aristocrat might have been a better L - lower aurlace name for the Pantera as it comes into the landing area just floating along with its Re = SO 000 nose in the air! 100 000 I’m not the best contest pilot around, 200 000 but that bird allowed me to take a ninth place out of the 135 fliers at the FSF. HQ-2.5/9

Continued on page 87 0 5- Separation bubble warnmo / Δ upper uooer aurlace V lower aurlace

FIG. 3 SECTION CHARACTERISTICS FOR FLAPPED AIRFOIL HQ 2.5/9

H Q -2 .5 / ) * F la p * 2 % 1 1 1 Ί ...... • · * 1 « = rs ffo o o too 000 f ^ A

*« / / 5 0 00 0 - bococc/jotioc i v - - M

>r r i i / y /T r r w v I t

M H i n t 5

io ” o . 15°

World F3B Champion Ralf Decker and his Quabeck airfoil data courtesy of Dr. Helmut Quabeck and Werner Thies (as it appeared in Flug winning plane. Uses Quabeck 2.5/8, 2.5/9. + Modell-Technik in the January, February, and July 1983 issues).

JANUARY 1984 31 S G > r j h p q

By DICK HANSON • We have had a smashing month, our hands on some 12-inch pitch props, some novice flyers, but I would like to thanks to a couple of radio failures. I 13 to 15 inches in diameter for compari­ offer a comment or word of encourage­ guess bad luck decided to be my com­ son. ment. panion this summer. As we fly the 4-cycle engine more, we I have seen many raw beginners On a positive note, we have resolved find that it has quirks that are different progress to very proficient flyers in just some past questions on prop design. I than those we learned to handle when two years of competition. The key of would appreciate any information you learning the two-cycle engine. Here are course, is determination and construc­ may have on similar testing. The problem some hints we hope can help you. tive practice. I’ve mentioned before, was the lack of performance on large 1. M ount the engine sideways with and will probably say again, that learning diameter propellers . . . specifically, our the exhaust stack down. This allows you to fly is much like learning to play a .60 0 5 VF just didn’t seem happy on 12- to prime plus purge excessive priming musical instrument. You advance in inch diameter, 8-inch pitch propellers. easily. plateaus, and the rate of advancement is We didn’t want to reduce the dia­ 2. Use a heavy leather glove or a determined by your adherence to a meter. so we took a different course of starter . . . these engines are real finger constructive lesson plan. However, If action. We narrowed the blades and eaters . . . they lay in wait for you to be you feel that you only have the ability to thinned them out. The performance casual, then BANG! GOTCHA! be a beginner-class flyer, rest assured, came up as did the static rpm. The tach 3. Use on-board glow plug heat with a you will be. showed about 13,000. This setup gave a separate o n /o ff switch . . . the ideal Two or three years ago we did a series good, steady, moderately fast level speed is usually too high for light on flying the AM A pattern. Subse­ flight, plus very good vertical perfor­ models, makes landings and taxing d iffi­ quently, some other magazines did mance. This test was repeated with cult. similar abbreviated articles. As yet, we another even narrower propeller. The Remember, a 2000 rpm idle is only don’t have any competitive background horizontal speed remained unchanged, 1000 heat pulses per minute, and that is in FAI flying using the new guidelines but the verticals seemed a little weaker very marginal for most glow plugs. We for noise and space, but we have been ... nothing conclusive. find that 1500 rpm idle is desirable, and working hard on developing models The question now is does a short wide the idle heat makes transition to and which will fit the rules and be easy to fly. rop pull as well as a long,skinny prop/f from this speed easy. To do this, we have had to rely on past oth nave the same pitch and both run I have enclosed a drawing showing experience with our Tiporare designs. at the same rpm? The short, wide prop how we do this. The total weight gain is Time will tell which style of flying is should be slightly less noisy, but I’m five ounces. Originally, I thought that I the most favorable among United States leaving the noise level out of the ques­ could find a fuel set up that would FAI contest flyers, but as the old saying tion for now. I would appreciate any eliminate the need for idle heat but . . . goes, "You got to start somewhere,” so comparable test results. no luck! we will attempt to offer a program that is While you were pondering this, con­ 4. Drive pins for the propeller are not basic and should give you additional sider the next test we have been running. mandatory but are of help. There must ideas on equipment and techniques This time on the OS 1.2 4-cycle engine. be a better setup than drilling a hole which work well in FAI flying. We found that the 4-stroke engine just pattern for all those bolts in every prop! To those of you who get M o d e l didn't lose rpm on vertical manuevers, Maybe some kind of a cup that captures Builder in nations other than the USA, and although the 14-8 props worked the prop and locks it to a backplate. At you may find our approach to the new well, they didn’t seem to be working the any rate, you will find that the props pattern differs from yours. If you have engine at its potential. Because the tend to require a lot of compression on ideas which you think can be of benefit narrow 12-8 props helped the 2-cycle .60 the drive washer. to us, please write to me care of Model engine, we thought we would try the Now that we (hopefully) have the Builder, P.O. Box 10335, Costa Mesa, CA modifications. This time using a 15-10 rules for 1984 Pattern solidified, it looks 92627. prop narrowed considerably. The results like we can all try turnaround pattern . . . were quite good. novice or expert, it doesn’t matter. Just P.S. The tests we were to include on As you may know, noise is not a join in. the new O.S. Wankle are not complete problem with these engines, in fact you Also, in case you hadn’t noticed, FAI as yet, but weare really encouraged with can barely hear them much of the time. Pattern is not flown in novice,sportsman, the performance so far. Along with this test we are trying to get etc., divisions . .. this may sound bad to Till next m o n th ,.. ·

RETRACT MOTOR MOUNT ANNULAR CRIMPS OR F L A P SERVO SUB "C " NICAD GLOW PLUG CLIP f G LO W PLUG MICRO SWITCH / AUTOMOTIVE WIRE CONNECTORS 146A WIRE THROUGHOUT

Lightweight glow plug clips can be made from 1/8 diameter brass tubing. Crimp the tubing using a dull tubing cutter, then slot with a Dremel Moto-Tool and disk cutter. Solder the wire well, allowing the solder to flow back into insulation. Bend wire 90 degrees after soldering. Slide medium size, thick wall silicone rubber tubing over the connection. This is the tensioner as well as the insulator. We have tested the circuit shown above with all the glow plugs we could find and all worked well . .. except Champions.

32 MODEL BUILDER ABOVE: (2) Classic shot of a Joe Ott Mr. Mulligan b u ilt by John Gomez, SAM 32. Dowling photo.

LEFT: (1) No idle boast about this International Pacific Ace Championships . .. over 25 entries! flying. Tom Brennan, leader of the rubber faction, is to be highly commended for his follow-on act, the ]oe O tt flying scale event, where any Joe Ott design is permitted. Of course, some of Joe O tt’s p m m m designs weren’t the best for scale as the emphasis was on flying, but because of By JOHN POND Joe’s versatility, there are a tremendous / backlog of models to pick from, ranging / \ from 16 inches to 50 inches. • This columnist commented several most popular being the old Modelcraft Photo No. 2 illustrates the foregoing months ago that it takes special gimmicks design, Pacific Ace 30. This special event very nicely. The Ben Howard Mr. M u lli­ to draw the contestants nowadays. The has proven to be extremely popular as gan DGA-8 (DGA stands for Damn Good recent meet staged by SAM 27 is the Photo No. 1 shows only a small portion Airplane, incidentally) model was built proof of this. of the entries ... the balance, flying of by Maj. (ret) John Gomez of San Ramon. As pointed out a year or so ago, when course! John is a SAM 32 spark plug and prolific SAM 27 and the Marin MAC were having The SAM 27 Annual was held next to builder. His Joe Ott version of the their hilarious challenge contests, they the Olive Tennis and Swimming Club, Stinson SM-1 last year was the sensation decided discretion was the better part of the field being an adjunct of this presti­ of the first Joe Ott contest. Unfortu­ valor and ended up by joining forces. gious sport center. The field had been nately, his model flew too well and was This has led to an annual contest consist­ under water for better than six months. lost for most of the day. ing of free flight and R/C, both O/T When it finally dried out, the marsh grass As a sidelight, the reader might be oriented. The free flight section is was abundantly high. It took two days to interested in the fact that Joe Ott spon­ dominated by rubber type models, the clear an area suitable for both types of sors this event. When first informed of

3. One hundred total years of modelling: Charles Werle and John Pond hold model which is very similar to what was flown back in 4. John Drobshoff won the Texaco event with this O.S. .60 4-cycle 1933. Dowling photo. powered Lam o Record Breaker. John is seen here tuning engine.

JANUARY 1984 33 5. Nick Sanford (R) describes how he w ill fly his Ralph Lowe V-Tail 6. A "beeg one"! Jim Caughram is nearly dwarfed by his Yates to Wild Bill. Lost tail under power. Dowling photo. Ten-Foot Model. Beautiful transparent covering. (Dowling.)

the idea, Joe was q u ite enthusiastic kit put out by Charlie Werle. This kit was featured the Limited Engine Run events about the Ott contest. Joe Ott (Ott is so complete, sporting an entirely hand which can be run off more quickly and short for Otto) is an amazing fellow. At carved propeller, that all it seemed one allows the contest to be closed earlier 83, he looks, acts, and talks models like had to do was to put an open bottle of (approximately 3 p.m.). This gives the he did 50 years ago. His latest creation, Hot Stuff in the kit box, shake well, and long distance traveler a real break in the R/C trainer, the Golden Eagle, as out would come a completed model. traffic as he can get through most of the manufactured by the St. Croix Co., is an There have been numerous requests for cars before getting piled up in all the excellent example of his adaptability to Charlie to resume production of this kit. Sunday drivers. new ideas and the production of original Write to Werle Mfg. Co., 3620 Morse, As a major breakthrough, John Drob- designs. Latest word has it, this model is No. 8, Sacramento, CA 95821. shoff finally won the Texaco event using an excellent R/C trainer. Werle is presently producing a line of a Lanzo Record Breaker powered by an The rubber portion (and for that all balsa stick type models ranging from O.S. 60 four-cycle engine as can be seen matter, the whole contest) featured an an R.O.G. to a high performance stick in Photo No. 4. John has been out extremely low-key air. While the flying job to a sport twin boom tractor. These racticing and the results are now was excellent, it seemed there was are presently being made for a local eginning to show. always time to spare for visiting, bull distributor, but if your club is looking for While we are on a “ Russian kick,” sessions, and trying out new models. something to get the beginner started Photo No. 5 shows Nick Sanford (origi­ Photo No. 3 shows what can happen to on, you might do well to contact Charlie nal name anglicized) with a beautiful you when you are getting along in years. about the availability of his line of Ralph Lowe V-tailed model known as You seem to retrogress. The all balsa models. They are beautiful performers. the Swallow. Unfortunately, whether it biplane being wound by Charlie Werle Getting over to the radio controlled was due to inexperience with V-tails, or and held by John Pond is an excellent portion of Old Timer flying, a pleasant the model was too sensitive, Sanford was example of one type of model built in shock was in store for the boys as Don able to tear the tail off under power. the early thirties. As noted on the photo Bekins was the Contest Director. Assuch Truly a shame to wreck this gorgeous caption, Pond and Werle have known he did not fly competitively. This was model. each other for over 50 years. Notice Otto kinda nice as it gave the boys a real break Sanford built the model after Pond Bernhardt (no spring chicken himself) in for a change, and did serve to lower the had drawn full-size plans based on Zaic’s the background getting a big kick out of high competition mood. latest year book. This writer (as well as the proceedings. For a change, the Texaco events were Sanford) can remember fondly the Modelers will remember the out­ held on the first day (Saturday) which marvelous floating characteristics of this standing Reid Hull Contest Stick model allowed flying until four o’clock. Sunday model back in 1937. Powered by an

7. Here's a really beautiful flying shot of Otto Bernhardt’s Raider 8. Whaddaya doin' Solenberger? Waiting for the blankety-blank seconds before the model shed its wing and crashed. O tto only frequency pin? Seen here is a beautiful 1/2A Texaco version of the had it airborne 20 seconds! Dowling photo. Alva Anderson Pylon. Dowling photo.

34 MODEL BUILDER 9. John Pond's Orwick powered R/C Sailplane (Carl Goldberg design). 10. Ron Dombrose comes loaded to every free flight meet with This is what you do with your old free flights. Mike Clancy assists gassies. Shown here are just a few! Gee, another couple of Carl Pond. Dowling photo. Goldberg designs: Interceptor, Sailplane.

Ohlsson Gold Seal, il did 28 minutes on Ten-Foot Yates Cabin model. Jim reports the air, the sky was raining model parts its first official flight. This flight proved to that if you build the model exactly as the for a while. Photo No. 7 shows Otto be no fluke as many other graceful plans show, the model comes out too Bernhardt's well-built La Torre Raider in flights were recorded thereafter. heavy (Yates was like Joe Weathers as he full flight. Unfortunately, around the 30- Ralph died of a heart attack at his used lots of oversized wood). Jim aban­ second mark, the wingsabruptly sheared residence in San Jose in the forties. We doned the first fuselage and built a new back and the fuselage became immedi- feel extremely fortunate that Frank Zaic one a half-pound or so lighter. This has agely a javelin, impaling itself in a line of had the three-views after all these years resulted in a lovely eight-pound model oak trees bordering the field. It took the and has finally made them available to that has a beautiful glide. As can be seen better part of an hour to fish out the the modeling fraternity. We had all in the photo, Jim used transparent important parts, like the radio set, figured the model design died with monokote to show of fhis superlative motor, etc. Another pretty model bit the Lowe. Great day in the morning! framing job. dust . . . so to speak. If you think this writer is a nut for big This contest featured quite a few aerial Bernhardt qualified as the modeler models, take a look at Photo No. 6 breakups. Whether it was over controll­ who came the longest distance to the showing AMA Contest Coordinator, ing or not, the structures being too meet driving from Gardena (below Los Dist. X, Jim Caughram, with his huge weak, or some vertical shear currents in Angeles) to Novato (30 miles above San VIVELL TWIN "60" SCALE DRAWN BY ALLEN POND

6"

JANUARY 1984 35 11. La rry C lark's Foo-2-U-2 seems to fly better every year. (Available 12. A rt Watkins, SAM 32, tunes his Ohlsson 19 powered Bay Ridge as/WS Plan No. 1175-O.T.) Mike, a Ray Heit design.

Francisco). Otto is a very active modeler model, the forerunner of the pylon sand the structure clean, this writer ran and is the real spark plug of SAM 49. He models. This 1/2A Texaco model per­ into some fantastic stuff twenty years has gone into the model business full­ forms so much better than its big ago that fills the bill admirably. A paint time producing ignition conversions of brother, it is astonishing! Ed Solenberger remover called "Stryp-eeze” is the glow engines, shielded ignition systems, (left) has had a long string of victories in greatest thing since peanut brittle. All timer assemblies, spark plugs, and many this event .. . using this model exclu­ one has to do is to brush the solution other accessories so necessary for the sively! onto the doped area over the wood, upkeep of the ignition engine. For those Ever want to know what to do with then wait ten minutes. The tissue then modelers who may be unaware of his your old free flights? Well, don’t throw pulls off easily! If it doesn’t work the first business, Otto runs a company known as them away! Photo No. 9 is an example of time, a second application generally cuts 77 Products, 17119 So. Harvard,Gardena, a twenty-year-old free flight model through the heaviest of dope jobs. CA 90247. Being a tool and die maker which was converted to R/C . .. four Not all paint removers work. As a (machinist par excellence), many pro­ years ago. (Finally finished it this year!) matter of fact, this product was the only jects not normally available through Powered by an O rw ick 64, the R/C one that worked on dope. Over a period standard sources can be obtained from model shows every bit as much promise of years, the Savogram Co. (Los Angeles) Otto. In short, besides his standard lines, as the free flight model did. The photo has changed the name of the paint he is a specialist in modeling parts. shows Pond cranking the motor with remover to “ Kutzit” . The new product Getting on with the photos. No. 8 is a long-time R/C glider expert, Mike although good, does not quite cut it like familiar sight . .. waiting on the fre­ Clancy, holding. the old Stryp-eeze, but it does an quency pin. The model shown is a half­ As a tip for those who hate to pull off adequate job, i.e., removing paper from size version of the Alva Anderson Pylon the old tissue or paper, then having to the base wood. One word of warning on this stuff: inasmuch as it inhibits dope and dis­ solves it to the point where the covering can be easily removed, it also attacks the glue join ts. This w rite r has found it necessary, after getting the complete structure down to wood, to lightly sand the frame to get rid of any of the inhibitor on the surface, then to reglue all the dihedral joints. You’ll be sorry if you don’t! Well, we have been yakking enough about the contest, miscellaneous trivia, and that sort, so it is about time we gave you the results. We do not have the results of the rubber events as Tom Brennan took off before the end of the meet. SAM 27 ANNUAL RESULTS CLASS A 1. John Pond ...... Playboy Jr. 2. Ron Kiel ...... Playboy CLASS B 1. Ed Solenberger ...... Playboy Jr. 2. Nick Sanford ...... Playboy Jr. 3. John Pond ...... Playboy CLASS C 1. Ed Solenberger...... Playboy Jr. 13. An old shot of the 42nd Fresno F/F Annual, Contest Manager, Jim Crocket Diesel 2. Jim K y n c y ...... Anderson powered Consolidated fíoamer. 3. Charles C ritc h ...... Ehling 36 MODEL BUILDER ABOVE: (14) This is an actual shot of Danner Bunch taking off in his S.E. 5, circa 1931-32. RIGHT: (15) Iťs 1934. and Danner Bunch is showing off his latest rubber design, the Stratosphere.

TRUE ANTIQUE 1. Otto Bernhardt ...... Lanzo 2. Nick Sanford ...... Swallow ANTIQUE 1. Jim K yn cy...... Dallaire 2. Nick Nicholau ...... Dallaire 3. John D ro bsh o ff...... Lanzo TEXACO 1. John D ro bsh o ff...... Lanzo 2. Charles C ritc h ...... Dallaire 3. Paul Forrette ...... Cumulus 1/2A TEXACO 1. Jim K y n c y ...... Interceptor 2. Ed Solenbereer ...... Anderson 3. Nick Sanford .. . Little Diamond ELECTRIC 1. Jim Ogg ...... Mike another, he stocked (or would order) fury and the resultant rationing of 2. Jim Kyncy ...... Playboy just about any engine the modeler materials, foodstuffs, etc. 3. Al Fabian ...... Playboy evinced an interest in. Although metal could not be obtained Of note in the Electricevent,unknown About 1940, after the Comet engine for such non-military products as model to Frank FJeacox, founder of SEAM, fiasco with Jack Keener, Vivell struck up engines. Keener had an excellent back­ (Society of Electric Airplane Modelers), a deal to produce an improved version log of parts and materials. Hence, during the dates of the event were switched, called the Vivell 35. The engine had no the war, the reader would occasionally putting Texaco and the Electric event on sooner hit the hobby dealers’ shelves, Saturday. Poor Frank drove all the way than World War II broke out with all its Continued on page 91 from Los Angeles on Sunday! Anyway, he did give the boys a good showing in how to make Old Timer Electric models fly. Also worth mentioning was the Satur­ day evening banquet featuring French cuisine. Maryann and I thought the food was out of this world! The French vintage wine was $16.00 a bottle! For that price it had to be good! Movies of the Sacramento State Fair Championships from 1933 to 1940 were presented by Nick Sanford. This is when the State Fair was the big meet of the year. Real nostalgia seeing shots of a slim Irwin Ohlsson, Bill Atwood, and a host of other famous modelers. ENGINE OF THE MONTH When you talk about Earl Vivell, you are talking about one of the earliest hobby dealers in San Francisco. This writer can remember vividly purchasing a Baby R.O.C. kit in 1929 at his shop located opposite the old Alexandria Theatre at 18th Avenue and Geary Street. Vivell eventually expanded his shop to become a distributor of model engines 16. Sid Sutherland, England, poses with his Class C Megow Soaring Eagle. M odel is Super in the 1935-40 era. At one time or Cyclone powered. (Built from John Pond plans.)

JANUARY 1984 37 By JIM REYNOLDS . . . The popularity of the 1/2A Texaco Old Timer event is on the upswing. If you are looking for a model to compete with, or just have fun with, this 82 percent Berkeley Brigiclier will fill the bill.

• I ho 1/2A Texaco version of the Brigi- 1/2A Texaco. By reducing it 18 percent, point right, without punching holes in (lior (the spelling of the Brigidier is the wing span c arne to 45 inches and the the fuselage covering. The plans show Berkeley’s not mine, not Webster’s) was wing area was just under 300 square the location of my radio equipment. My built to generate some interest here in inches. It looked good on paper. There servos were put in with thin servo tape, the San Antonio area for the Texaco was enough room in the cabin area for but servo rails could be used. too. event. From what I have road, heard, and two Ac e R/C Bantam servos, a 225 mah The landing gear wire slides up into a personally experienced. 1/2Λ Texaco is battery pack, and a Royal Vanguard slot made by some 1/16 ply pieces glued a truly lun event If you have been flying receiver. to the 1/32 ply fuselage doublers. It is more, and enjoying it less, give 1/2A There is nothing unusual about the then epoxied in place. Texaco a try. Brigidier's construction. The wing and The needle valve of the Blackwidow Any SAM approved Old lim er model the tail were completed first, so they was too short to clear the top of the can be used, that is. models designed, could be attached to an uncovered firewall. An extension was made by kitted, oi plans published prior to fuselage. This way you can move the RC December 31. 042. It can be scaled up equipment around to get the balance Continued on page 80 or down to any si/e. The engine must be a Cox Babybee, Goldenbee. or Black- widow. The fuel tank is limited to the 8 cc stunt lank that comes with the Goldenbee or Blackwidow. And finally, the model must weigh a minimum of eight ounces for each square foot of wing area. The object is to stay airborne 15 minutes on 8 cc of fuel. I chose the Brigidier as a 1/2A Texaco model because I had built a Berkeley Brigidier kit when I was a kid. back in the 40’s. It was my first gas model. The model was never llown with power because I could not afford the engine. However, with the correct weight rock in the nose, it had a beautiful glide! I have never forgotten that model. The original Brigidier had a wing span of 55 inches and a wing area of about 445 At 16-1/2 ounces, this 300 square-inch wing area O/T is a real feather. Three-minute engine square inches. It seemed loo big for runs produce nearly out-of-sight climb-outs. Author's model was covered using Silkspan.

— 38 MODEL BUILDER JANUARY 1984 FULL-SIZE PLANS AVAILABLE - SEE PAGE 98 39 A Saito Twin .90 four-cycle engine powered Don Harris' (Seattle, Wash.) Orline Sopwith Pup very nicely. Model weighed 10-1/2 lbs., and flew realistically. THE ROC’S FIRST ANNUAL BIG BIRD BASH The story is timeless . . . and simple. Man gets his loins all fired up by a challenge, and then proceeds to get on wilh it. And so it was with the newly formed Puget Sound Rocs (IMAA Chapter 108), who with much guts and gusto started planning for a July BIG Bird Bash on the very same cold January morning that all fifteen decided to throw in together. The “ guts” figured into it because the Rocs had no roost of their own .. . although the Mt. Rainier Radio Control Society (MRRCS) came to the rescue and donated their field for our two-day fly- in. The "gusto” part because it wasn't as if there hadn’t been any BIG airplane activity in the Northwest; the boys in Northern Oregon and the Canadians from Boundry Bay had already held at least one (each) happening of their Two different models of the Fleet Finch. Both are Quadra powered and weigh 21 to 22 lbs. own. But all of these had been limited in Bruce Edward's version is in the foreground, Leonard Bosman's is in the background. attendance mainly because no large scale publicity campaigns had been There’s absolutely no doubt that we like the crowds of spectators during that attempted. create more genuine interest, and pre­ third weekend in July, literally fell all So, the Rocs dove right in. In addition sent a better, more respectable image over themselves getting to the Mt. to the usual mailing of flyers to area than any other group of flyers. I know Rainier field to see what it was all about. clubs,hobbyshopsand known modelers, for a fact that neither the Tacoma paper Because it wasn’t our field, we got we also utilized the AMA and IMAA nor any of the three TV channels that some flack about the expected number club lists, and the IMAA membership list taped us would have shown any interest of spectators; a few prophets of doom for District XI. This was how we con­ whatsoever if we had been trying to get peeked at their crystal balls and forecast tacted most of the 40 pilots whoattended coverage for the smaller, noisy, "greasy- uncontrollable hordes who would pil­ the bash. A few of the pilots and the 2000 kid-stuff.” None of those media people lage and plunder, and in general lay plus spectators were reached via news­ had ever seen, or heard of quarter-size waste to their flying site. Of course none papers and some exceptionally good TV birds powered by chainsaw, weedtrim- of this happened because none of these exposure. mer, and BIG four-stroke engines, and "soothsayers” were BIG Bird Lovers;

Gordon Hoffer’s Byron CAP 21 weighs 15-3/4 lbs. equipped with The only Christen Eagle entered in the Roc’s Fly-In was flown by Quadra engine and Mickey Mouse pilot. Larry Cochrane (Lewiston, Ida.). Weighed 21 lbs.. Quadra powered.

40 MODEL BUILDER Emil Neeley's Monocoupe 90A weighed 15 pounds and proved to Scratch-built Curtiss Robin by Puyallup's Bruce Gale. Bruce had be very aerobatic. Quadra engine pulled it along very nicely. Model flown the full-size Robin and couldn't resist making a quarter-size had beautiful cream colored finish with red and black trim. version. A Quadra 50 motivated its 35 lbs of gravitational attraction. they were Pattern and Quickie people are gonna come from. Our roster grew annual fly-in. Besides a number of who had never been fortunate enough by a whopping 25 percent due to the Canadians, and guys from Oregon and to experience the very predictably warm interest and curiosity we generated that eastern Washington, we welcomed a and friendly interest . . . and respect. . . Saturday and Sunday. few Northern Californians and a baker’s shown by visitors. The novelty of a How about the 40 pilots? Well, they dozen from Idaho. Pattern or Quickie contest soon wears had one helluva good time and are Wasn’t at all surprised by the eleven thin because all the birds look the same looking forward to the Roc’s 2nd four-strokers that snowed up, which was (and in fact, must be, in order to stay Annual BIG Bird Bash in 1984. . . and all one more than the total amount of competitive), and all fly the same boring were in total agreement that lots of Quadras on the field . . . but still can’t schedule. Even a Sunday at the local RC flying time and no competition or account for the complete lack of WW-II club’s field becomes uninteresting trophies made them very happyfof Warbirds among all those 56 aircraft; before too long due to the very unrealis­ course, the nice flying weather helped). Mustangs, Jugs, and Corsairs are usually tic sound of the “ angry mosquito” glow Only three of those 40 made any men­ perennial favorites. Pitts and CAP’S engines and the "Saturn Rocket” way tion about being bothered by the trees never did show up in force, either. Only these overpowered and inefficient (the Mt. Rainier Field is scenic, but not one Byron, and one scratch-built Sheber planes are flown. quite optimum for a bevy of BIG Birds), Pitts were present and accounted for, But give these same spectators a with one of them adding that he thought while only one CAP 20 and three CAP bunch of BIG Birds, and they’ll linger the situation actually made him fly 21’s made it to our social. Most of the happily for hours . .. staying behind the better. It was. truly, an outstanding first birds were well built, very well finished, barriers although chomping at the bit for a chance to get some good, close-up pictures. The basic reason for this differ­ ence in attitude and interest boils down to the fly-in being what it is. . . a relaxed, low-key social gathering of BIG Bird people. As it’s not a contest, every pilot builds and brings his favorite birdie (or two), so the field is covered with a myriad of different, colorful biggies. Because the planes are not look-alikes, and because no one has a set pattern to fly, each flight then becomes delightfully different. On both days, the hundreds of on­ Al Alman's quarter-scale Sig Clipped Wing Cub flew just like the full-size Cub. Power is supplied lookers present requested some picture­ by a Magnum .91S 4-cycle engine. Weighs 14-1/2 lbs. at T/O. See the product review, page 12. taking time, and both days we closed the flightline for about a half hour, giving everyone a chance to take pictures and talk to the pilots. This desire to get more involved with the planes and their pilots stems from the spectators ability to identify (with) the miniature aircraft; they look just like the full-size birds seen flying overhead and parked at local airports. And because all of this is topped off by the final touches of realism . . . size and sound . . . the non­ modelers are hooked. I can't imagine a BIG Bird Fly-In without spectators, and more than I can imaginean EAA Fly-In at Oshkosh without their usual, never- ending crowds. There are other sound reasons why spectators figure so prominently in our plans; they’re a solid source of revenue when raffling off that six-channel rig, figuring your fair share of the food wagon’s gross, and levying a reasonable parking fee. Also, even more im por­ Television and newspaper promotion helped attract many spectators. Two more rows of seated tantly, this is where many new members people land standing people behind them) were left out of this photo. Nice, orderly crowd!

JANUARY 1984 41 Ray Blatťs 1/3-scale Sheber Pitts in red, white, and blue paint scheme Another rendition of the Monocoupe 90A, this one by Ron Alder, of looked good in the ait and on the ground. Model weighed 25 pounds, Tacoma, Wash., weighed in at 14-1/2 lbs. Used geared O.S. Max .60 and needed its Roper 3.7 to be effective flier. fo r power. attract a maximum amount of pilots and planes . . . and we took up the slack by raffling off a six-channel R/C rig at the field, which really brought in the bucks. The lucky pilots whose names were pulled every hour received BIG Bird type goodies .. . props, tanks, fuel line, heavy duty servo arms, plugs, oil, ad­ hesives, a kit, and even free eats. As for the gory details . . . yes. there was some of that goin’ on, too. Between a bad solder joint that caused some very functional flying wires to fail, tree tops that had more than the usual amount of vacuum, and a pilot vying for “ The Dum- Dum of the Year Award,” a few of the nicer aircraft were totalled. However, nobody bought the farm due to a fre­ quency problem, and we were using all Sandpoint, Idaho, was represented by Ted Farmin and his Nosen Citabria. Weighs 20 pounds the new freqs, too. with a Webra 1.20 up front. The quality and caliber of the flying and reflected the amount of pride their have come to appreciate the mutual was the best I’ve seen considering most owners had . . . but, of all these impres­ safety and peace of mind it offers. In of us came out of the closet not too long sive labors of love, my favorite was the keeping with the safety theme, we ago. And this is probably because our scratch-built 96-inch DeHavilland Tiger limited the number of pilots in the birds are staying together much longer Moth that belonged to Ray Broomfield "b ox” to fo u r . . . also making it manda­ . .. so we’re getting to fly them more. from Salem, Oregon. Her low wing tory for each pilot to have his own safety We really have come a long way in the loading upped her effective power man. It all worked out very well; every­ past five to six years; we’ve learned how loading, allowing the 23-pound Quadra one had the opportunity to fly just about to design and build better, and lighter, powered beauty to F-L-Y just like the as often as he wanted to . .. and I gotta so that success is now the rule rather real Moth . . . majestically. point out here that we only had two than the exception. Although there’ve been those who’ve "hangar queens” sitting on their duffs. Here’s good news for that third week­ bitterly resented and opposed the air­ Most everyone had come to fly . . . and end in July '84; the Rocs have just worthiness inspection because they fly is what they did. acquired their own big, flat, open, flying took it as a personal affront, this safety Incidentally, this first annual fly-in of field, so you can look forward to a bigger procedure has now become a standard ours was free; no landing or registration and better 2nd Annual BIG Bird Bash. part of every IMAA Fly-In . . . and pilots fee at all. It was a successful attempt to Just circle that third weekend in July on your new calendar very year, ’cause that’s when our annual fly-in's are going to be held. FUEL PUMPS . . . ARRRRGH! I thought the fuel pump problem had finally been solved with the Black & Decker "Jackrabbit.” Remember how I described in glowing terms how well built it was and how well it worked. At that time the pumps I personally knew about, and tried, were a year old and showing no bad effects from heavy use. However. . .upjumpedthedevil.and in the few months since then, both of those Jackrabbits have gone to hell in a handbasket. They lasted longer than most pumps sold in hobby shops.. . but that just ain't good enough. How come we can put men on the moon and receive good pictures of Saturn’s rings, Mighty impressive deHavilland Tiger Moth by Ray Broomfield, Salem, Oregon. This was a but can’t turn out a hand pump that will biggie: 96-inch span, 23 lbs., and Quadra 35cc engine. hang in there and w on’t go to pieces

42 MODEL BUILDER Vince Rainier. Post Falls, Idaho, brought this 28 pound Gere Sport Terry M uggli, Spokane, Wash., brought more than one bird to the with a Kioritz up front. Fly-In: the ,90-powered Cosmic Wind (pictured) and a Zlin 250L. and quite frankly, I don’t even want to talk about it anymore!!! LOOSE SERVO ARMS Everything seems to run in groups and bunches, the most recent example being a rash of letters describing the horrors of havi ng servo arms come loose . . . with the end result being total disaster in most cases. According to the letters, none of these guys forgot to reinstall that small servo arm retaining screw: it loosened up and backed out after being secured. Dick Smith, who hails from Waynesboro. Virginia, was one of the lucky few, his bird is still flying. The story goes like this. . . "As your November column included comments about securing servos, At Alman's Quadra-powered Fairchild 22-7-AT. Flies well at 21 pounds. Would you believe thought I would share with you another that it's very close to scale? problem relating to servos. This one has inside of a year's use? I’ve been using Come to think of it, I, too, used to to do with the screw holding the control mine for a good six months and so far, so transfer fuel by pressurizing the con­ arm to the servo. good . . . but, as I don’t believe much in tainer with a Sig Pressure Pump before I "The other weekend I suffered minor coincidence, these two failed pumps got fancy and started using a 12-volt (very lucky) damage to my Balsa USA have me concerned. Right now the best battery and power panel. Sig still makes Sopwith Pup when the control arm advice I can give is not to buy a lackrabbit the 32 ounce, the 1/2 gallon, and the apparently came off the elevator servo if you haven't already done so. .. and to gallon size pumps . . . and they’re avail­ just after (?) takeoff. The flight was keep a close and jaundiced eye on the able complete with container, or you different, to say the least! Had it been one you may be already using. can get the fuel pressure pumps only. any other aircraft but the Pup. it would Bruce Edwards, who’s pump was the Think I'm gonna go back to this pressur­ have been totalled. first to distintegrate, says he’s going back izing bit; can’t remember ever having "The only way I could control altitude to using an airbulb to pressurize his fuel any trouble with it. was to vary the Pup’s air speed using can with. He never had any problems We do have one local BIG Bird type throttle. Fast engine . . . climb slightly: with this rather simple setup, and who swears by (not at) his IM hand idle . . . lose altitude (approximately 20 switched to the lackrabbit only because pump. He says he’s been using it for a degrees nose down); in between speed it transferred fuel faster. I'm awfully long time, and it’s still goin’ strong. . .. straight flight. sorry that these B&D units don’t appear However, at this point, I feel sorta "It was soon obvious that a normal to have any guts, but at least thisendsup snakebit and kinda reluctant to recom­ landing procedure was out due to the on a constructive and positive note. mend anything in the way of pumps . . . Continued on page 97

Bob Nevins needs this big, dirty old truck to haul this half-built 15- Darrel Lockling brought this beautiful scratch-built Fokker DR I foot behemoth around. He wouldn't even hazard a guess as to when from his home in Keizer, Oregon, to fly with the Roc's. Plane was it might be ready to fly. constructed from Scratch-A-Plane plans. Quadra powered, 20 lbs.

JANUARY 1984 43 Editor's note: This ",Planes an' Facts an' Chickum Tracks" is the second of a series which began with the August '83 Model Builder. Puzzles, Ground Effect, Humidity... and A Lot About Air • We are starting this m onth’s "Planes lyst which developed the interest in prompt in sewing on replacements for an’ Facts an’ Chicken Tracks" with one aviation that so many of us in the hobby the buttons that "pop off". Li'l De-Icer is change in the title and one addition. The yet maintain. On behalf of us all, I thank also retained on the staff in the event change is "C hickum " instead of "Chick­ you for that, too, Zack. that P&F&CT is successful in bidding on en", honoring a new member of the It isn’t very widely known, but Chick­ government contracts. Another good P&F&CT staff, and the addition is the ums is a highly competent mathemati­ reason is that she came highly recom­ new masthead. cian. Fat Stuff speaks Chickum talk quite mended by Zack! At the outset, I want to thank the fluently, a talent that completely eludes Everything in the heading has signifi­ creator of "Smilin’ Jack” , Zack Mosley, me! However, I can easily read his cance. The Camel is representative of and the Tribune Company Syndicate for chickum-track mathematical treatises. the first P&F&CT about the "Sopwith granting me permission to use Fat Stuff, This is fortunate for all of us, for Chick­ Camel Effect", which appeared in the Chickums, and Li'l De-Icer in our mast­ ums handles all P&F&CT math needs, August 1983 issue of Model Builder head. During the many years this strip and he is most thorough and diligent in magazine. Incidentally,youshould keep appeared in the newspapers, these and this function. Whenever we are working this issue (and other P&F&CT issues) in a many other characters created in Zack’s together, I have to be very careful where temperature and humidity controlled artwork became much more than car­ I step in order to avoid his copious out­ environment, for air can wreck any toons ... they became living personal­ put. Our budget is too small to accom­ chances of willing these valuable issues ities who married, had children, aged, modate a mathematician’s salary, but of Model Builder to your issue. Air can and sometimes died in his stories of Chickums has settled for buttons, which be bad, very bad! winged adventure. Zack Mosley strongly are dispensed by Fat Stuff. The budget To continue, the hangar sign repre­ supported aviation (as he still does) and I does allow for an occasional shirt as a sents the 1935-1941 flying site of the San am certain that his artwork was the cata­ bonus for Fat Stuff, but Li’l De-Icer is Antonio Gas Model Association, where

GROUND EFFECT ON THE FOKKER TRIPLANE

44 MODEL BUILDER this writer learned all about the care and the rest of the masthead consists of air! 1/10 pound. In the cage there is a swing. feeding of gas model airplanes. The How could they fly otherwise? Let the bird sit on the swing. Now, care­ great bunch of guys in that club also Silli just presented a problem, which I fully put the cage on a balance (Silli’s taught him sportsmanship. That means have to pass on, dumb as it is. Believe word for a gizmo to weigh things on). learning how to smile, congratulate, and me, keeping your help now-a-days is What does the whole thing weigh? shake the hand of the no-good, cheating also a problem! Right, even the most casual unlearned louse who manages, through chicanery Consider a big, light, airtight bird savage would agree with Chickums that and the help of his friend, the timer, to cage. Let’s say it weighs ten pounds. beat you out of the contest on his last Now, let’s put a bird in there that weighs Con tinued on page 81 official flight! The wind tunnel depicts experience obtained during WW-II at NACA, Langley Field, building and CALCULATION OF MOLECULAR WEIGHT handling models used in the free flight AND DENSITY OF AIR and spin tunnels. Many of the modelers I met then are now S.A.M. members and friends of today . . . forty years later. (A) (B) (Ax B - 100) Some issues containing John Pond’s Molecule Percentage Molecular Product/100 excellent "Plug Sparks" mention names that make me pause, recollecting per­ bymol.wt. weight sonalities and events that are so wonder­ N itrogen (N?) 78.09% 28 21.87 ful to remember ... an unbelievable time, really. O xygen (O?) 20.95 32 6.70 The little fellow hiding behind the A rgon (A) .93 40 .37 books at the far right is the P&F&CT Other goodies .03 — — librarian and director of research, Syl­ vester Silverfish. Again, due to budget 100.00% 28.94 problems, Sylvester suggested his as­ The equivalent molecular weight of air = 28.94 at 32°F and suming that title in lieu of more money. 14.7 psi. Silli (he hates to be called that) and Chickums have some language in com­ Density at 32°F = 28.94 oz/22.4 ft3 = 1.292 oz/ft3 = .08075 lb/ft3 mon. They seem to work very well together, although I sense what may be a To calculate the density of air at 59° F (for example) we must personality conflict. I don’t really agree have a multiplier. Converting degrees Fahrenheit to degrees with Silli when he confides that it is a Rankine (absolute temperature scale), we add 460°. Therefore, food problem. I am firm in my conten­ tion that Chickums prefers buttons! 32° F = 492° R and 59° F = 579° R. As densities vary inversely The only thing left in the masthead is with temperature, the multiplier in this case is 492/579. air. Oops, that isn't quite right. There are two birds! That correction will take care Density at 59° F = 1.292 x 492/579 = 1.224 oz/ft3 = .0765 lb /ft3 of the purists. . . OK, Woody Woodruff? The birds are there to demonstrate that (See text for further explanation and significance o f this data.)

JANUARY 1984 45 Sixth photo of a series shows finished results of author’s method of painting car bodies.

By DAN RUTHERFORD AUTO PHOTOS BY AUTHOR

• There are dozens of ways to paint . . . Fantastik all-purpose spray cleaner, At this point it isn’t particularly logical bodies for RC cars; I have tried numer­ available in super markets, does the job to toss in a comment about materials and ous techniques, some that worked, and and is easy to get. After spraying with tools ... but I will do it anyway. When some that didn’t, as well as having Fantastik, rinse the body well with clean using the traditional masking tape, you watched three of the best . . . Bob water, let dry, or cheat as I do and dry it will find that one and only one brand Welch, Jim Welch, and Cary Kyes .. . with a heat gun. will give decent results, and that is the apply their talents, masking tape, and While taking decent pictures of a clear 3M brand. It probably won't be available paint to stretch-molded hunks of Lexan. body is almost impossible, a close look atyourlocal Discy Hardware store, and it And while I went back to fairly basic will show that we have installed the is always the most expensive to buy. It is, paint schemes a couple of years ago, I masks for the number backgrounds. however, the only brand of tape worth have also been known to bend a fairly These masks are made easily by laying a pulling off the roll. Use it. mean piece of tape. strip of two-inch wide masking tape on a As for tools, not many are needed,and Of course, this article will reflect my smooth surface; I use a large chunk of an X-Acto knife with a sharp #11 blade current practices. I do simple paint jobs steel that has been surfaced, but a piece will get you by adequately for most for a few good reasons: I have settled on of glass will also work. A pattern of the cutting operations. However, a superior a color scheme that I like to look at, and background is laid in place on the tape, a tool is available, and that is the Uber it is one that is highly visible on the race simple run around with a sharp knife will Skiver available from (free plug music, track . . . no all-black race cars for the net you a number background. My please) Model Builder. Punching up a DRT! Preparation is the key to being pattern is made from 3/16 thick plexi­ product sold by MB sounds really sus­ competitive on race day, and rather than glass, although most any hard material pect, but I guarantee that the Uber spend all night doing bodies, I would will be acceptable. I used to make them Skiver, other than having a strange rather check the car from one end to the out of 1/8 plywood. sounding name, really does the job, and other. Although I have all the trick-o spray equipment, including the neces­ sary compressor, it is one big hassle to do several colors, cleaning the gun between colors, and then cleaning all when done. This is one reason I simply use spray cans, even though it limits the tricks you can do with the paint. Besides the bodies have to be considered disposable, which makes it pretty tough for me to ration­ alize spending hours doing one, only to ruin it in less time than it took to paint it. That can happen once in awhile. Referring to the first picture, you will see MRP’s recently redone (widened and reflared) Camaro body in clear, placed upon an Associated RC500. What you can’t see is that prior to doing initial fitting of the body, it was sprayed inside 1. How to paint your R/C car, step one. Place clear plastic body over the chassis (in this case and out with a degreaser solution I have an Associated RC500). Mark cut-outs to be made later. 46 MODEL BUILDER 2. Side and rear windows are masked off completely, windshield 3. The MRP Camero body, ready for color. Number background is almost completely masked, only final trimming required. masks are in position as is the mask for the center color.

4. The body completely painted, ready for cut-outs, application of stickies, and wheel wells. 5. Detail shot of side scoop formed by cutting out window and folding it back on itself. Gives motor a cool air supply to fins. I haven’t used anything else in years. I body on the chassis, we can now make mount really low, and it is best to would suggest ordering just the handle sure that the numbers don’t fall where determine where interference crops up, and a vial each of number 10 and 11 cutouts will be made later for such or even if the body can be used at all, blades as these two numbers are the things as front body posts and exhaust before paint blocks your view. And in ones you will find yourself using the outlets. At this time the body is centered the case of a body we have used pre­ most. To keep the blades sharp, drop in on the chassis and then adjusted fore viously, an old one can simply be mashed on a shop specializing in knives and and aft, remembering that we quite in place over the top of the new one, such, buy a high-quality sharpening often will ignore the molded in guides then the location of the cutouts can be stone, and you’re set. for the wheel wells, usually placing the traced directly onto the new bod. Back to the body .. . and with it still in body well forward to get more steering. Windows are the next things to be clear, we stick the background masks in In the case of the MRP Spyder Can-Am masked, and if you will look closely at place. Be “ creative” in placement of body, we will mount it as much as 1/2- the first three pictures, you can see a these masks at your own risk. In our area, inch forward of its intended location. As dark masking tape outlining all glass 95% of the bodies have a number at the it happened, when readying this par­ areas. In the third picture, thissame tape front, centered on the body, plus a ticular body, we did line the wheels up can be seen running down the hood, number on each side, again roughly with the wheel wells as it was our first dipping around the area of the door, centered, this time between the wheel time using this body, and the RC500 and then back up around the rear deck. wells. The lap counters here are accus­ turns so well that body tricks are not This is great stuff, available in many tomed to looking in these areas for the required. hobby shops under the KHP (Karoden number of the car. No way am I going to With the body in the desired location, Hobby Products) label. We use both take the chance of having my car not get a Sharpie marking pen is used to mark sizes (it comes in 1/4-inch and 1/8-inch counted on each and every lap, so my the locations of body posts, stinger widths) for masking, in this case we used numbers are right where the counter outlets, glow plug access hole, fuel tank the 1/8 size. expects them to be. access, antenna location, etc. This is all The KHP tape is very flexible, it easily At a recent race we had one fellow done on the outside of the body, of goes 'round the tightest curves, and it complaining about being missed a lap or course. If we are moving the body sticks well. Best of all, it is a fairly dark two and, sure enough, he probably did forward, we w ill also make sure that full- red color, so it’s easily seen through a get missed at least once. But he was size tires are on front and rear, and then layer or two or regular masking tape. We racing a dark-colored car, using thin we trace around them on the exterior of use this to advantage by running the white outline numbers, and had placed the body. KHP tape around the outlines of the his numbers on the side of the car to the While we don’t do it on the pictured windows where its flexibility is much rear of the rear wheel well! Now that is body, when mounting a body for the needed. Then to finish off the job, wide just asking for trouble, and while we first time, we will sometimes make all of widths of 3M tape are used to fill in be­ won’t force him to change number the necessary cutouts just to get the tween. Any overhang is easily trimmed styles or placement, we also won't spend body low and to see what hits first. In the away using an Uber Skiver by sighting much time listening to him tell us that case of the RC500, most GT bodies will fit down on the outline of KHP tape and our lap counters are screwed up! without interference, but quite a num­ With the masks in position and the ber of Can-Am bodies can be tough to Continued on page 95 JANUARY 1984 47 PYLON at the U.S. Nationals By JOHN G. SMITH . . . Model Builder's newest contributing editor covers the airborne racing at the Chicopee Nationals. Just a few of the 80 Pylon racers entered at the 198:

• Racing's premiere event. Formula 1 Fifty-three contestants with 80 air­ day and a half to allow the scale contes­ Pylon, was played out under hazy, hot planes from as far away as California and tants more time on the weekend. (I skies here in the East at Westover A.F.B., Texas slugged it out for one full day and guess racers aren’t so bad after all.) Chicopee, Massachusetts. The site was a half to finally decide the winner. The There were no serious threats to the nearly ideal being located at the North­ racing was ably managed by Contest national records. Gary Hover’s 1:14.80 east end of an unused runway. The only Director, Adam Sattler of District II with was close as anyone would get. Dave minor problem being trees nearby on the starter, Guy Beaudoin and all the Shadel had the second fastest time at one side. The smooth pavement surface workers coming from District I. Bernice 1:14.81. The East's own tried their best. allowed for long approaches and even Williams, local AMA Contest Coordi­ Tom Castallano, "velvet thumbs,” suc­ longer landing rollouts. nator, handled the job of figuring out cumbed to interference on blue and Processing was held at the Nats head­ the matrix, and Patty Thibodeau worked white, an electronic malady which cost quarters hotel, the Quality Inn. The job at the tabulating table handling all the so many planes during Nat’s week. Bob of determing who was to take off first in scoring chores. Out at the starting line, Wallace, Pete Reed, and Keith Palmer of each heat was handled by Bert Williams the faithful few, led by starter, Guy Connecticut did their best to bring the and a staff of dedicated assistant judges. Beaudoin, all around nice guy (sorry Formula 1 Nat’s trophy to the East. All For the second year in a row, Gary about the pun) and fellow racing foe, three had minor problems, and only Bob McPike of California was given the kept all the eager racers in line. and Pete placed in the top ten. number one position (Top Dog) with his Things went about as smoothly as any The highlight of the racing, at least for pair of immaculately finished Denight race of this magnitude can go. The me, was eleven-year-old Chris Cheyer specials. The job of judging was made all course had to be changed once due to a of Connecticut. Chris has to be the the more difficult by the large number 180° shift in the wind. Racing was youngest ever Formula 1 contestant to of excellently finished planes. changed from three half-days to one full enter a Nationals. Both times when I

ABOVE: Keith Palmer revs up the engine of his racer while turn caller Tom Castallano holds. BELOW: Chris Cheyer, at 11 years old, is probably the youngest Formula 1 flier at any Nats.

Gary McPike with the number one Pylon racer at the 1983 Nats.

48 MODEL BUILDER ABOVE: Pete Reed, long time Formula 1 competitor, switches on his radio at the starting line. No shoes! LEFT: Don McStay, of Franklin, Mass., flew his first Nats race in Formula 1.

went out to the starting line to take make one of the best scale-like takeoffs you who read this column send to me pictures of Chris he couldn’t get his ever, only to climb up, over, and down the rules and regulations of your local engine started. His father began to think to destroy itself in fine fashion. Seems Quickie 500 event so that I can see what my camera was a hex. Quite an achieve­ Pete forgot to turn on his receiver. the rest of you are doing. ment and thrill for an eleven-year-old. Bob Wallace of Avon, Connecticut, I received my first letter this month Don McStay of Franklin, Massachu­ put it all together to take first place, with from Jim Boccinfuso, Vice President of setts, raced at his first ever Nat's and third place Dave Latsha taking fast time the Long Island Flying Eagles. Thanks for about his third Formula 1 race. In with a 1:32.36. The only low point of all the kind words, Jim. I hope to hear from contrast to Chris, Don is a lot older than this was the less than premiere equip­ more of you in the future. eleven. ment provided, and the number of Next month, I plan to go into my The contestants owe much thanks to beers being consumed by some of the method of skinning a Q-500 wing . . . the group of dedicated workers at contestants in racing, and some of the putting on, not taking off that is. I will pylons one, two and three, and those at other events. also report on the happenings in For­ the starting line, Dennis Thibodeau, Irv Much thanks has to go to Contest mula One-40 in this area. · Thurrott, and his beautiful daughter Director Adam Battler and his crew of Jessica. My appologies to the rest of the willing workers. Good job guys and gals. John G. Smith. workers as I didn’t get their names. Maybe next year at Reno, AMA will try The FAI turnout was rather poor with Quickie 500 as a non-official addition to only four racers for the “ quiet event.” the racing. I think the turnout would be Pete Reed got everyone s attention phenomenal. I am going to make an when his FAI racer screamed down the effort to help it happen. pavement towards the scatter pylon to I would like to request that those of

ABOVE: Guv Beaudoin, official starter, sends off another heat. BELOW: The ready area at the '83 Nats looked like a swap meet.

ABOVE: Number One of the For­ mula Ones, Gary McPike talks with his caller before start-up.

RIGHT: Tom Castallano with his racer. Tom is a local hot shot who had the unfortunate experience of losing his Denight to radio inter­ ference.

JANUARY 1984 49 from short grass to very long grass, pro­ vided the plywood is large enough to keep the grass down by the tail. This sys­ tem has been used extensively at most helicopter contests with very good results, and has the additional bonus of being portable. The problem with the plywood surface is that the novice doesn’t have the skil I to land within the disk. You have to be able to hover reasonably well in order to put CHOPPER down on a four-foot diameter pad. So, the best area for the novice is the sealed By RAY HOSTETLER asphalt or smooth concrete surface. This CHATTER brings me to the type of training gear I would recommend to be used. TRAINING GEAR Whether to use training gear or not • This month I'll pick up where we left of wear and tear on the helicopter. . .. is not even a question. Use some sort off last month by defining proper flying Undoubtedly, the cleanest type of of system to widen the gear’s stance and sites for initial hovering, training gear surface is a closely-mowed grass area, give greater stability for those shaky setup, and what kind of help to look for. with an emphasis on closely. Long grass novice landings. AREA SELECTION is notorious on tail rotor blades. One Probably the easiest gear to make, and Where you plan to fly is important, it area that I feel the helicopter manufac­ the most widely used, is the dowel rod / will also dictate what type of training turers could improve in is to offer as an arrowshaft and Whiffle Ball combina­ gear you should use. First, the worst area accessory a high skid gear. Have you tion. The dowel rods should be 1/4-inch you can use is a gravel parking lot. The ever flown a Competitor out of grass? It’s diameter on the smaller ships, and up to small stones and dust can be extremely a real trick to keep the tail from settling 3/8-inch diameter on the larger heli­ hard on tail rotor blades and particularly in and eating a set of tail rotor blades. copters. The diameter of the rod also engines. I heardofan instancewhereone High skid gear would really ease these depends on how long each rod is. fellow literally wore out his engine in problems for those flying out of a sod Thirty-six-inch rods at 1/4-inch diameter one afternoon by flying out of a gravel area with average length grass. work great on smaller helicopters and area. Also, the dust generated by a On the other hand, grass can be one provide good stability. Larger ships will hovering helicopter gets all through the of the worst areas to learn to fly off of. It need at least a three-foot rod (a four- mechanical parts of the ship, doing the is very unforgiving to any right-left foot rod is better) with a 3/8-inch most damage to the collective linkages sliding of the helicopter, causing tip- diameter. and head. overs if the machine is not smoothly Several different patterns can be used For those of you who don’t really lifted straight up. (But if you're going to with the training gear. The simplest understand how dust and grit wear out crash, grass will absorb more impact and being a crisscross or X pattern with the an engine, I will explain: the carburetor lessen the damage.) center of the X under the helicopter's ingests dirty air, which passes through One other option is to throw a ply­ center of gravity. You can also use a tic- the front and rear bearings, working its wood disk on a grass area. This works way up into the cylinder wall. Then the extremely well on almost any surface Continued on page 84 piston grinds the dirt against the wall, using the dirt as an abrasive. The grit dramatically increases the wear between the two surfaces so that the engine loses all compression, and all power, too. Asphalt can be nearly as bad as gravel, especially if it’s older stuff and starting to deteriorate. The deterioration leaves very small stones and extremely gritty dust, which is just as hard (if not harder) on an engine as “ regular” dust. New asphalt surfaces work well, espe­ cially if they have been given a coat of sealer. This gives a nice smooth surface with a bare minimum of grit. Concrete is a step better than most average asphalt, even more so if you can find a finely finished area. However, most concrete lots suitable for flying are usually finished slightly rough. This can literally wear holes in your skid tubes. If you fly off of concrete, you’ll probably want to use some type of plastic tubing over the front and back of each skid. The cheap, clear type found in auto supply stores works just fine. A foot of this can easily be enough for three helicopters. The best thing that you can do for an asphalt or concrete area before flying is to spray the immediate area clean with a water hose. If this isn’t possible, you can sweep the area thoroughly with a broom. This may sound like a lot of trouble, but it will be worth it because it will save a lot

50 MODEL BUILDER

England’s Denis Fairlie made this delightful vintage Deperdus- The author's all foam, passionate pink Spitfire as described in sin. Span is 48 inches. Power is by OS .15. A 3-channel the text. Model comes from Japan, and is manufactured by radio control system handles the guidance. Bentom . two-flight duration from four attempts. there are the chorus girls dancing atop has directly benefited from the influx of Rick demonstrated his Charybdis at Mile the wings of a whole series of “ in flight’’ tourists. Square Park recently, and offers to aircraft, including a phoney-looking S.E. PINK SPITFIRES? furnish additional information and 5, a Fairchild 71, and some Hollywood Yes Virginia, there were such things! proposed contest date to anyone who prop department’s idea of a Lockheed According to Tommy Wilson, Editor of may care to send him a stamped, pre­ Vega, which appeared to be made of the Scale Staffel Newsletter, the ma­ addressed envelope. plaster. Even a Buhl Pup and a Sikorsky chines were painted this way during AERIAL PHOTOGRAPHY flying boat made brief appearances. World War II to assist their photo Model aircraft articles are where you Sure the plot was corny, but where else reconnaissance missions, as the unusual find them. Bill Pepin, of Albuquerque, can you see scenes like that? New Mexico, was kind enough to alert HUGE HUGHES SUCCESS Continued on page 77 us to the August 1983 POPULAR PHO­ According to a clipping sent to the TOGRAPHY, which featured an article hangar by Bill Warner, the Hughes by Larry Sribnick on how to install a Spruce Goose flying boat has been Kodak Disc camera in an Airtronics drawing more visitors than anticipated. O lym pic 650, for purposes of aerial About 10,000 people see the attraction photography. each Saturday and Sunday, and even FLYING DOWN TO RIO during week days the average is more Ever watch the old movies on late- than 6,000 a day. As long waiting lines are night television? Some of them can yield involved, the Wrather Corporation unexpected bonuses. For example, the (display operator) has added attractions, 1933 film Flying Down To Rio, which such as jugglers and actors made up to apparently introduced the dance team resemble Howard Hughes, whocirculate of Fred Astaire and Ginger Rogers, also through the crowd to help reduce featured a remarkable assortment of boredom. Such financial success should aeroplanes. Picture a Monocoupe with a ensure perpetuation of the exhibition, piano behind the seats ... which evi­ as well as helping to maintain interest in Fritz Mueller's stick·n-tissue, rubber-powered dently could actually be played! Then its sister exhibit, the Queen Mary, which auto gyro. Abstract design.

The German team at the Flemalle, Belgium, indoor scale contest: Sherman Gillespie's ten-cent kit Aeronca features original 1935 (left to right) Siegfried Glockner, Demoiselle 20; Benno Sabel, wheels, but the propeller is a modern plastic type. This is one Santos-Dumont 19; and Jurgen Weil, Demoiselle 20. We like Peanut th a t flie s as good as it looks. your shirt, Benno!

JANUARY 1984 55 the answer. Numbers 1 through 9, and a single zero were used. Initially, thesmall numbers were stamped on the outside of the cylinder about an eighth of an inch above the cylinder threads. Later they were stamped on the side of one of F u e l i „UNES the exhaust ports. In recent years, when JOE KLAUSE i. AÄJ internal factory identification was not P. O. Box 2699 always deemed necessary, some cylin­ L«i(|ima H ills. CA 92653 ders were not numbered. Here is a brief synopsis of what the numbers meant. • Some years ago, I was warned of the not quite as universal. The crankshafts No. 1. A two bypass cylinder with a danger of making casual assumptions. I on many of these are identical, however, large exhaust port that permitted sub­ remember being told by my senior, some reed engines that were installed in piston induction. It was originally made "Consider the word 'assume.' Think of plastic cars such as the Sandblaster, the for the 290 and 291 series engines that the first three letters, the next one, and Van, and others, had different style were used in plastic cars. Later, it was then the last two. Now, if you assume too crankshafts. Reed valve crankshafts vary used in the first Black Widow engines. At much, you’ll make an (first three letters) even more. However, for the general that time the top cylinder fin was not out of (next letter) and (last two letters)." scope of this column, the crankshafts milled to accommodate a maintenance I’ve never forgotten that incident. and crankcases of the following engines wrench. Subsequently, the Black Widow Nevertheless, I still always assume that are interchangeable: cylinder had two narrow slits for each no modeler would purposely do any­ Black Widow Dragonfly exhaust, and the top fin was milled, but thing to damage an engine. My faith in Golden Bee QRC the cylinder was not numbered in this this assumption has been fortified by the Baby Bee configuration. many modelers who have asked ques­ The only difference in this group is the No. 2. This denoted a single bypass, tions such as, "Is it okay to put a T.D. .049 anodized color of the Black Widow and sub-piston induction cylinder. The top cylinder/piston on one of my reed valve Golden Bee crankcases. fin was not milled. This type was used on engines?" Obviously there’s a concern The tank and back plate are sometimes the Golden Bee, however, the cylinders about not causing damage. Another considered to be parts of the lower ends were not always numbered. common question, which came up in a of .049 reed engines. Again, there are No. 3. A two bypass cylinder that telephone call this past week, is whether many variations, so I’ll just comment on initially did not have the bottom of the an .051 cylinder/piston assembly can be a few. The backplates of the Black exhaust ports milled low enough to pro­ installed on an .049 crankcase. Seems Widow, Golden Bee, and QRC are the vide sub-piston induction. Later, the like a good time to review some parts of same. The tanks of these engines are also exhaust milling permitted sub-piston the Cox .049/.051 engines. the same except for color and some induction, and the outside was ground PARTS INTERCHANGEABILITY variation in fuel throat diameter. All .049 for use with an exhaust-restrictor type The basic reason why so many Cox reeds and their retainer springs are throttle, and the top fin was milled. •049/.051 parts are interchangeable is interchangeable as are the gaskets. No. 4. This was made for T.D. .049 because of engine stroke. All of these Glow heads are also universally inter­ engines. There are two bypasses, each engines, whether they’re T.D.’s or reed changeable. Cox number 325 is a low with three separate milling cuts, and the valves, have a design stroke of .386 compression head. The 1702 is the high bore is tapered. The exhausts allow sub­ inches. Similarly, the threads on the compression one. piston induction and the top fin is cylinder and crankcases are the same, That completes the parts interchange- milled. and the crankpin diameter and the con­ ability of interest to most readers. If you No. 5. This has the same features as necting rods also match. Thus, you can need other specific information, just number 4, however, the bore is .410 freely interchange cylinder/piston as­ send me a stamped self-addressed enve­ inches. It is used on the T.D. .051. semblies between all .049/ .051 engines. lope together with your questions. No. 6. Twin bypass, no sub-piston Please note, however, that I spoke of Before moving to the next general induction, and milled top fin. Some cylinder/piston assemblies. All .049 subject, let me give you one caution. were externally ground for restrictor engines have a bore of .406 inches. The Putting a T.D. cylinder/piston assembly throttles. bore of the .051 is .410 inches. Naturally, and a «1702 glow head on a reed engine No. 7. The same as number 2, but with the pistons can’t be interchanged be­ will really improve performance, how­ a milled top fin. cause of this difference, but there are ever, you will increase the risk of frac­ No. 8. Single bypass, narrow exhaust, two other reasons for keeping assem­ turing the crankshaft pin. So, be fore­ no sub-piston induction. Top fin not blies intact on the .049’s. On the .049 warned. milled. Used in cars. reed valve engines the bores of the COX CYLINDER NUMBERING No. 9. Unfortunately, I do not have cylinder and the piston are straight. The Occasionally, I am asked about the samples of this cylinder. My only infor­ T.D. cylinder has a slight taper. Likewise, numbers that are stamped on Cox mation is that it was only in very limited the T.D. piston is tapered. Although .049/.051 cylinders. Where are they production. both pistons will physically feel like they located? What do they mean? Well, No. 0. Again, I have no samples, but it fit both cylinders, they should not be those two short questions can’t be reputedly is the same as number 6. arbitrarily interchanged because per­ answered with two short sentences. It’s Now, if all that sounds reasonably formance will usually be lost in both more like a short but interesting story. definitive, let me add a bucket-size grain instances. Here goes. of salt. There are variations to the above. With respect to T.D. crankshafts, Cylinder numbering is simply a means Some are minor, such as the size of the crankcases, backplates. prop drives, of identification. The practice was not numbers, and are understandable. carburetor retainer nuts, needle valve begun primarily to aid the modeler. Others are major and unfathomable. For assemblies, and venturies, they’re the Rather, it was begun at the Cox factory as example, I have two number 6 cylinders same on the .049 and .051. In fact, the an internal identification system. At one that both have .410 inch bores and .051 only difference between the lower ends time, there were literally millions of T.D. pistons. I can only conjecture as to of these engines is the color of the cylinders manufactured during a year. how and why they were produced. plastic carburetor housing. The more There were subtle but significant differ­ Guys, next time around, hopefully I’ll common .049 housing is black, and the ences in cylinders depending upon the have a series of photographs of some .051 is red. many different engines that were being interesting Cox engines. Until then, The interchangeability of parts of the made. These differences were not obvi­ have a happy and blessed holiday lower ends of reed valve .049 engines is ous, and so a simple number provided season. ·

56 MODEL BUILDER By BOB STALICK

Dr. Phil Barber, of Vancouver, B.C., launch­ Bob Stalick and Josh Chamberlain (right) es his Barber Pole gas m odel at a recent pose with a Simplex A - 1 free flight model. meet near Albany, Oregon. Peter Johnston • I know this is the January issue of The model was built by Josh from 3-view. watches the action. Dee Grell photo. Model Builder. I also know that you receive it in December. You need to of Washington (after winning a BMA 45 degrees and attached with dope. The know that I am writing this column in scholarship), I still thought that he had to spars in the main panel are reinforced September, so it’s difficult to think about be a high school student. After he with carbon fiber top and bottom. The Christmas and New Years Day .. . but obtained his degree from the U of W and wing is covered with a single layer of Merry Christmas and a Happy New Year began working for Boeing, I thought he tissue, and the stab is covered with a .25 for 1984 just the same. was still a high school student. When he mil mylar attached with contact cement. As it is September, many free flighters got married, I had difficulty imagining The fuselage is balsa/plywood with a \im (including myself) have just completed that he could be old enough. He has to Walters fiberglass boom. M y towhook is flying in the FAI semifinals. This column be at least 25 years old (maybe older), a m odified Iseanko, essentially a ‘Bat- contains something for each of the FAI and to me he still seems to be a young­ Hook’ Mk. II and I use VIT for circle outdoor free flight events. So let's get on ster . .. Maybe, it’s me! towing some of the time." with it! Kevin has proven to be an excellent A- For readers who don’t cotton to the JANUARY THREE-VIEW: KEVIN 2 (or F1A, if you prefer) flier. It is his "simpler is better” theory (as I do), let COLLINS’ “ NUMBER 7” F1A NORDIC major event. This model is undoubtedly me tell you more about the achieve­ I first met Kevin Collins through the his best performer yet. It represents ments of this glider. .. with Kevin as the local contest circuit when he came to Kevin’s no nonsense approach to the pilot. The model currently holds the the meets in the family car driven by his event. Kevin credits Jim Walters with AMA record for its class. Kevin made parents. He was too young to drive. many of the ideas incorporated in his seven maxes plus the following flyoff When he was a student at the University design. He said recently, " It is the flights: 240, 300, 360, 420, 480, and 399 fourth A-2 I have constructed with the seconds. This means 12 consecutive same basic dimensions. I am continuing maxes, until the 13th flight when he to use these on newer gliders. The D- "only” made 399 (6 minutes and 39 box has a .6-ounce glass cloth applied at seconds). To max on his last flight, the

Dick Williamson launches his P-30 model into max air. Dee Grell photo. JANUARY MYSTERY MODEL

JANUARY 1984 57 DARNED GOOD AIRFOIL RHODE ST. GENESE 31

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

UPPER Z 6 7 4.7 5.67 6.92 8 8.94 10.12 10.66 10.82 10.33 9.5 8.16 6.5 4.5 2.25 0

LOWER 2.67 1.2 0.66 0.34 0.17 0 0 0 0 0 0 0 0 0 0 0 model would have had to make nine minutes. The old record was set by Lee S K E T C H 1 Hines in 1976. Kevin broke it by more A ______5 2 , than four minutes. D E T A IL A D E T A IL B In addition, Kevin won the Northwest ff Æh P p Semifinals in A-2 with the same model, A-1 !! aDP the (light was poor. The Montreal stop system avoids this problem. Tom Cash man took the time to m i _1 show Ted his system, and now both of » i i i Ted’s Wakefields sport the Cashman Montreal stop. Ί The notion behind the Montreal Stop is that the motor pressure on the prop i'll shaft determines when the prop should ------c r stop, not the length of the expended motor. This system is not affected by TOM CASHMAN'S MONTREAL STOP SYSTEM variations in thickness or length of the S KE TC H 1 motor. Sketch 1 shows the hold plunger (Part A) in the hold position. With the rubber The workings are simple: The motor is motor wound, the prop shaft (Part 8) presses against the stop plunger (Part B). The wound, and the prop assembly is at­ other components identified are: (1) aluminum prop hub; (2) thrust bearing; (3) shaft tached to the motor. The stop plunger bushing; (4) hole drilled into prop block face plate; (5) hard aluminum prop block (B) in the sketches is pulled forward, and face plate; (6) number not used; (7) prop block. the free turning prop shaft presses D E T A IL A against it holding it away from the face Hold plunger components: (A-1) 2/56 nut soldered to the top of (A-2) to act as a grip; (A-2) a brass control line lead-out eyelet of 1/16 in. inside diameter, nominally plate of the nose block. The model is 1/2 in. long; (A-3) 1/16 in. music wire running the whole length of the hold plunger. iaunched and when the pressure of the D E T A IL B prop shaft decreases due to the ex­ Stop plunger components: (B-1) 2/56 nut soldered to (B-2); (B-2) 1/16 in. music pended rubber motor, the stop plunger wire running the full length of stop plunger; (B-3) brass control line lead-out eyelet, spring forces the plunger down to the same as (A-3). face plate and into the hole drilled into Not shown in either detail is the compression spring used. It is either hand-wound it. The prop stops rotating and the blades or taken from the flint spring of a Bic or Cricket cigarette lighter. fold. The model is now gliding. S KE TC H 2 The hold plunger is shown in the release position. At this stage, the model is in Tom has added a little, but important, flight. The prop shaft (8) is still pressing against the stop plunger (B). feature to his Montreal style hub . . . a S K E T C H 3 hold plunger (A). This plunger is spring The hold plunger is still in the release position, however, because the motor has loaded to push itself out of the face plate wound down, the prop shaft is no longer pressing against the stop plunger (B), and hole. The hold plunger allows you to it has in turn sprung down into the hole in the prop block face plate (4).

Continued on page 96 58 MODEL BUILDER JANUARY 1984 59 60 MODEL BUILDER S P A N - 30 r r (M 0 .0 ) THE Speedwagon—

By HAL deBOLT . .. Model Builder turns back the clock to 1944 with Hal deBolt's account of the first AMA Control Line speed record and the model that set it. Learn how C/L got its start!

• History can be interesting, especially if even if you are not a controliner, you word" among the model fraternity it concerns your favorite hobby-sport. can see new attempts at them being leaders. The War created problems for Witness the growing interest in all sorts made during every Nationals meet. modelers, along with everyone else. No of "old tim er” models these days. One It all got underway during WW-II and engines were produced, balsa and all participant tells of seeing some 300 "old practically exploded after the War. materials became hard to come by. Gas timers” at one event! Control line reached its "Hey Day" rationing was stringent. Free flight Then too, model aviation is mellowing during the early '50s, and by far the most models had a tendency to fly away. It with age. Many of today’s modelers popular contest event was speed flying. took gas to get outside the city to the were not even born when some of our Thousands of contests were held each free flight fields. Free flights created more recent categories were originated. year and the majority of the modelers problems, C/L was new and could be None of us were here when it ALL flew in them. Today's comparison would exciting, the fuse was lit, and it did not started! be R/C which may have equalled the take long for control line to blossom into This is a story of the beginning of activity. popularity. control line flying, and in particular, Previous to WW-II, free flight was the About 1943, the AMA finally recog­ how the C/L speed records began. "th in g ” . A few modelers lead by Jim nized Control Line as an established Today you find such records listed Walker and Victor Stanzel had put lines category. Rules were needed. The monthly in AMA’s Model Aviation, and on models, however, C/L was a "dirty AMA’s rule writers were free flight

The Patuxent Model Engineers: (L to R, back row) Bob Dishong, Paul Heisler, Roy Shine; (front) Hal deBolt, Claude Hartman, Marty Kania. Note original Bipe [MB Plan No. 7832) in foreground (right), and Speedwagon in foreground (left). 62 MODEL BUILDER oriented, which will explain the similar­ was for Class C. Shortly after, fellow their own right. ity of the first C/L speed rules to those of modelers, Matty Kania established a The first Navy recreational hobby free flight (in those days). Fortunately, Class B record of 75 mph, and these facility was organized at the Patuxent the first rules were short-lived, as you attempts started the ball rolling. Matty Naval Air Test Center in Maryland read them you can understand why the labeled his design the C7H, and a during the war. The "Patuxent Model C/L modelers screamed bloody murder version of it was later successfully kitted Engineers” became a very progressive for a change! by Megow Model Aircraft. club in a really short time. The facility In brief: Speedwagon . . . the name has a was in an abandoned “ civilian” barracks 1944 AMA Control Line familiar ring? Where did it originate? (the Test Center was brand new) which Speed Regulations Probably on Madison Avenue where had flight circles right outside the door. Class C some “ ad cat" made a bundle with it. In Such a useable facility generated great activity amongsomeseasoned modelers, Maximum engine size: .61 cubic inches the 40s, heavy trucks were monstrous, Line length: 70 feet ponderous things. The Reo M otor Com­ new C/L designs and models seemed to come right out of the woodwork! Official flight: 10 laps pany introduced a new line which was labeled "Speedwagon,” even though a When the AMA released the new C/L Minimum model size: more descriptive name would have regulations, this enthusiasm naturally Wing area: 200 square inches led to a desire to have a crack at it. Club Fuselage cross section area: 10 square been "Tortoise” or "Rhino.” However, members soon had the designs and inches it sure was a cute name for an aircraft models completed, as a result it was not Weight: 48 ounces aimed at speed! long before records were established in Landing gear: Minimum wheel size: If you were into C/L in the '50s, and all classes by the Patuxent Model Engi­ Two inches. Model must take off thus think that we have the wrong 3- neers. and land on the SAME wheels. view for a Speedwagon, take heart. Your The Speedwagon was the most unique The Speedwagon established the first recollections are of the MANY which AMA C/L model speed record, and this followed and were Speedwagons in Continued on page 98

JANUARY 1984 63 from a larger iron or a soldering gun. STRUCKS 1940 SERIES 5 0 ” Old Timer R/C The resultant coating will last many times longer than a lead solder tinning, 1939 - « ς NEW RULER and also seems to extend the life of the AIR TRAILS Partial Kit tip. SPORTSTER 0 €> $39.95 $33.00 SERVO POWER CONVERSION There is no doubt about it, our hobby 1938 .29 to .36 (.90) Clow Span. 835 Sq . in. “C" or "D " Ignition has reached a highly sophisticated state, In addition to the Just Released New Ruler, the involvinga lot of different industriesand POWERHOUSE following partial kits are also available. JL 9 $39.95 The 1936 FLYING QUAKER (Megow’s) 84“ $21.50 skills. It is doubtful whether one single 50" SPAN 380 SQ. IN. 32-38 OZ.' The 1937 QUAKER FLASH (Megow’s) 67"span $17.50 person anywhere understands every­ The 1937 "LONG" CABIN. 78" span $20.00 3 CHANNEL, .09 TO 15 POWER The 1937 AIR CHIEF (Ideal’s). 61" span $20.00 thing about all thedifferentsciencesand "SERIES 50" Kils are Full Kits witn Machine Cut 6 Partial kits are Rib. Tip. and Former kits, m ey techniques involved in putting even the Sanded Parts. Formed Landing Cear. Partial R/C feature Machine Cut and Sanded Parts. Full Size Hardware, Detailed Full Size Plans, and Printed Construction Plans, and building notes. They simplest R/C trainer in the air. One of Assembly Instructions. | 2 or J Ch R/C G*ar Reqd.l meet SAM FF and R/C requirem ents. these rather difficult areas is that of servo COMING: 54" Quaker. 48" Flybaby; 48" Miss America COMINC: 120" KG -2; 84" Miss Delewarc. 96" Lanzo RB 48" Cleveland ^V iking; SO" Clevelaryd Cloudste r. power, the measurement and calcula­ At your Dealer or tion of which is definitely beyond the T r a ·Φ © Μ ΚΜ ΠΪ add $2.00 per order, scope of this publication . . . there are for UPS. Ca. Res 1 ^ P O Box #9. Midway City. Ca 9?6S5 add 64 for Tax. entire volumes devoted to the "kinetic energy of rotation” , which we are as high a rate as C/3; 800 milliamps for certainly not going to try to duplicate three hours. here. All such information is interesting, INTRODUCING SOLDERING IRON TIP CARE and it would be nice to understand it Even after the selection of the best and to be able to do one’s own testing THE NEW possible soldering iron and solder for and calculations, but for practical pur­ the job at hand, it is still extremely easy poses, it is enough to know that the FOX 29 BB to make consistently bad solder joints. higher the ounce-inch figure claimed by All one has to do is to let the soldering the servo manufacturer, the more iron tip get dirty and/or oxidized. It muscle is going to be available to move happens very easily, for many reasons. our control surfaces. And of course, we Naturally, one of the major reasons is the must rely on the reputation of said fact that it is hot, and surrounded by manufacturer to accept that its testing oxygen; it burns. Other reasons are im­ was accurate and that its claims are valid. purities in the solder or flux, and when A point to remember is that some of working on manufactured equipment,a the bigh torque figures we are reading protective spray that might have been since the advent of larger and larger applied to protect the printed circuit models are not gained on a calculator. board from oxidation. True, some of these increases are the As important as keeping the tip clean result of more efficient motors, and The Fox Schneurle 29 is the brand can be, it is also easily done. A moist carefully designed minimum friction new replacement for our popular sponge kept on the workbench, so that gear trains, but ultimately what is doing Baffle 29. With today’s modern the tip can be pulled over it on the way the real work is a transformation of the technology, our latest model Fox 29 from the soldering iron holder to the energy stored in your airborne batteries. produces half again more power than work at hand will almost always ensure a The higher the claimed torque of any our older 29, and does it on little or no clean bright tip for each solder connec­ given servo, the higher is going to be its nitro. The new 29 is interchangeable tion. In time of course, the tip will erode current consumption. The mere addi­ with the earlier model Fox 29’s. Isn’t enough to need a more thorough clean­ tion of a set of high powered servos to it time to trust your model to a ing and reshaping, which should be your existing R/C system will not trans­ powerful new Fox engine? done with a fine tooth file and fine sand­ form it into an adequate setup for your 23000 Fo* 29B8RC Schneurle...... 359.95 paper. After that step, it is very important large, heavy airplane: it is equally im por­ 13000 Fox 29BBCL Schneurle...... 44.95 that the tip, especially the part that was tant that you also includea largecapacity 90236 TIII Up M u ftie r...... 14.95 filed down to new, shiny copper, be re­ battery, or provide for between-flight 90237 Tilt-Down M u ffle r...... 14.95 tinned, which is recoating the tip with recharging of any small battery being solder. used . . . or both! MFG. CO. Tinning the tip is easily done: heat the As if it isn’t enough to try to under­ iron, and apply the flux and solder, stand this torque business, with which 5305 TOWSON »VE FORT SMITH ARK 72901 wiping off any excess solder with a soft, most of us are unfamiliar, we sometimes Our Hot Unt: (501) 646-1856 slightly damp cloth. A better, longer last­ read about a foreign made servo for ing tinning job will result with the appli­ which the figures are given to us not in cation of silver solder to the front part of the ounce-inch figure which we are the tip. Silver solder has heat transfer used to, but in gram-centimeters, which Electronics . . Continued from page 11 qualities just as good as those obtained we are not. I’m sure the problem exists from lead solder tinning. Silver solder also on the other side of the pond, battery of six of these cells, all of which comes in hundreds of types and makes, where our foreign readers try to de­ were subsequently charged and were one of the easiest to obtain, being cipher the claims the U.S. radio manu­ tested as good, for only $4.95! Look for readily available from model shops or facturers are making for their servos. them in your local stores if you are in a mail order suppliers, is named ” Stay- That part of it, at least, is simple. To metropolitan area, or in the ads of the Brite.” This solder comes in a bubble convert ounce-inches into gram-centi­ electronic magazines if you are not. pack which includes a length of low meters, simply multiply by 72.01. Con­ Though the cell in the accompanying temperature, silver bearing solder, and a versely. to convert gram-centimeters photo is made by General Electric, they small bottle of the proper flux necessary into ounce-inches, multiply by 1.389 are also found with at least a half dozen for its use. It takes a little more heat than x 10 other names such as Gates, etc. A num­ normal lead solder, so if your small iron R/C EQUIPMENT AT THE NATS ber of two-volt chargers are available by itself will not develop enough de­ The AMA recently released some from our own suppliers: Hobby Shack grees Fahrenheit to make the Stay- interesting information on theoperation and Royal Products that I know of. and Brite melt and flow properly, help it of our R/C equipment at this year’s Nats maybe others. Charging may be done at along with the application of more beat at Westover APB, in Massachusetts. All 64 MODEL BUILDER registered transmitters were tested by trained personnel, using some rather • 6 CHANNEL RECEIVER* elaborate and accurate equipment, ac­ • 4 MIDGET SERVOS (NES-1 A) cording to various bandwidth and other standards according to FCC rules, and • 500 MAH SQ. BATT (SANYO) deemed necessary for proper operation • AILERON EXTENSION under high density conditions such as • M IN I SWITCH HARNESS one might find at a large event of this nature. Two rather interesting facts emerge. One is that there wasn't any interference reported on the new R/ C channel*. This proves conclusively that all of that doomsday talk and action, such as the club that reportedly banned all of the new frequencies from their field, has been based more on hearsay and inex­ perience than on experience or fact. Note of course, that this is with all tested equipment on the field, it will still be possible for one improperly operating transmitter to ruin things on other R/C frequencies at your field. The word seems to be. "proceed with caution, but proceed!” Futaba/compatible plugs. Matches all modern TX. Plug-in crystal included. ^Specify Frequency. Add S2.50 UPS, Cam. residents, add 6%. Allow 3-4 weeks tor Secondly, the team processed 600 checks Send 9 !4 * l VA SASE tor tree brochure transmitters, 100 on the six-meter band, 2709-C Orange Avenue, Santa Ana, CA92707, (714) 549-3741 and 250 each on the old and new fre­ quencies. Of these 600 transm itters, munication or supply involved with this in reader-world will not recognize these NONE failed to meet the AMA estab­ new service. names, but you country and western lished criteria, and all were passed and So file away the above address for music fans certainly will. I recently heard flown, some with as many as 15 models future use. and remember that all Kraft a radio interview with Earl Thomas in the air at the same time. As I have factory service, including warranty Conley, during which he told about his stated before, a transmitter, (or a re­ work, regardless of the age of your recent interest in R/C airplanes. De­ ceiver. or a servol does not an R/C system, is to be handled for you there. scribing himself as one w'ho likes to do system make . . . the above reported For those of you in the local area who things on his own. he went on to tell successful operation also speaks well for will want to drive there, go east of the about buying, assembling (apparently the receivers being used. San Diego Freeway on Oceanside Blvd.. some type of ARF). and trying to fly his It is also interesting to know just what Apple Street parallels it to your left. The first airplane, with the expected results. R/C systems were being flown; the 1919 number is about a half mile up from He talked at some length about R/C; it following is an alphabetical breakdown the freew'ay. seems that he has been bitten by the of the brands flown and the quantity of CQ SIX METERS bug, and remarked that "it am t easy", each; I had a note from Kenny Kern, K9BEH. talking about apparent control reversal, Ace R/C 47 of Bedford. Indiana, who encloses the and other problems that the student Airtronics 37 following information regarding Six R/C pilot has to contend with. He also Circus 78 Meteroperation: "Recent FederalCom- mentioned that lean Shepherd's hus­ Futaba 133 munications Commission rules changes band (Mr. Shepherd???) is deeply in­ Kraft 111 include the following: volved in the hobby. World Engines 22 '97.99. Stations used only for radio So it appears that this is a job for one of Pro-Line 17 control of remote model crafts and you instructor types out there in Nash­ The following brands were repre­ vehicles. ville. Tennessee . . find Mr. Conley and sented in quantities of less than 10 each: 'An amateur radio station in radio don't let him crash his number two Cannon. Cirrus. EK Logictrol, MRC. control operation with a mean output airplane. And you can do me a favor at Royal. Sanwa. Tower. RS Systems, Orbit, power not exceeding one watt may. the same lime. If you get that whole and Heathkit. when used for the control of a remote country and western music crowd in­ KRAFT SYSTEMS SERVICE model craft or vehicle, be operated volved. or at least interested, and you As of October 1983. all service and under the special provisions of (his learn of a day when Crystal Gayle is repair work on Kraft Systems R/C equip­ section, provided that a writing indicat­ coming out to the local field, be sure to ment, including warranty work, is to be ing the station call sign and the licensee’s call me early enough so that whatever done by an independent company. Kraft name and address is affixed to the airline is still in operation at that time can National Service, Inc., located at 1919 transmitter.' " get me there! · Apple St.. Suite G. Oceanside,CA92054. What this means to you flying hams The telephone number there is (619) out there is that to be 100". FCC legal, 433-1628. you must have a "w ritin g " stuck on your Sig C ub. . . . Continued from page 13 This rather unprecedented move, a transmitter, which includes your name, first in the industry, means only that address, and call sign. Nothing is said dope; it worked fine. On the fuselage I Kraft owners will no longer be dealing about the internal or external position­ used Balsarite. and found that when the directly with the manufacturer when ing of the "w riting." and as most “ w rit­ heat was applied, it did its job well. The their equipment requires service. How­ ings" do not adhere verv W'ell to a vinyl tail section was treated with a thinned ever, this does not mean that the work on covered transmitter, even when clean out mixture of aliphatic glue, and when your system will be done by inexperi­ . . until we are told different in the heated by the iron, that also literally enced or untrained personnel, and both future. I am going to assume that a label fused the Ceconite to the wood. I know ownership and operation of this new with the proper information, on the that dope will also do the deed, although facility is in the hands of long-time Kraft inside of the rear cover of my trans­ I haven't used any for years, and there­ service center technicians. The location mitter. will suffice. fore had none to try. is close to the Kraft factory, and there CQ NASHVILLE The Ceconite responded well to heat should not be any problems of com­ You punk rockers (yeech!) out there from both iron and gun. and in short

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 65 in performance between using a "four- stroke plug” or the very familiar, long, WILLIAMS Λ Γ Γ ϋ ίίΠ Ρ TT7C idle-bar plug. As for fuel, all of these BROTHERS engines run best on five to ten percent nitro and no more than ten percent oil. My Magnum, I’ve discovered, goes i PILOTS bananas over five to six percent oil. Also, STANDARD · SPORTSMAN RACING · MILITARY gotta point out that four-strokers really squeeze the mileage out of an ounce of WHEELS ► fuel. Whereas you need a 16-ounce tank VINTAGE · SMOOTH CONTOUR to get about ten minutes from a two- BALLOON · GOLDEN AGE stroke ninety, the same displacement in a four-stroke will easily yield 16 minutes Alfo, i ENGINES from an eight-ounce tank. How about ^ PRATT & WHITNEY · WRIGHT · IE RHONE that? There is one idiosyncrasy of the four- stroker that was, initially, very annoying, IJARTS ► but has since almost stopped bothering PRATT*o » tt & · \AyWHITNEY La iTkiCv · - icLE d RHONE u a u c me: you’ve got to leave the %#(@*& WRIGHT · GNOME plug connected till she warms up con­ siderably (which tends to make one very impatient) . . . otherwise she runs rough —GUNSJ . and could die at low throttle. The "last first.” an aircraft that needed , Λ 1 * ' =SSSSS^ S ^ £ no nose or tail ballast, was a nice surprise, Is— ' W ' LEWIS ■ VICKERS · SPANDAU · PARA8ELLUM and due mainly to the additional weight of the Magnum (a good eight to ten SENO $1 FOR FULLY ILLUSTRATED CATALOG ^ Í i u i a s w DEPT. M8 181 PAWNEE ST. SAN MARCOS, CALIFORNIA 92069 ounces more than a two-cycle ninety). My bird, named "Dee," balanced at 31.6 order the whole plane was covered and Magnum .91S four-stroker was bolted to percent of her Mean Aerodynamic looking good. Preparing the framework the firewall. This must be proof that you Chord (MAC), which I could find no for the Ceconite was not all that bad or certainly can teach an old modeler new fault with. And outside of adding 1-1/2 time consuming, but did give me a tricks. degrees of right thrust and coming in severe case of nostalgia. Y’see, back in As I mentioned before, these BIG one full turn on both elevator clevises. I the late forties, I used to earn my aero­ Birds are slowly, but insidiously, getting still haven't changed anything after well batic lessons by cleaning up around the me to think more and more in terms of over two dozen flights. I'm able to do hangar, and helping with maintenance scale. Y'know, I never used to be con­ many aerobatic maneuvers with ease, .. . and some of that included giving a cerned about cutting into a cowl (if I although I plan to move that balance hand recovering tail and control surfaces used one at all) for access to the needle point back a little at a time. with the then brand new and experi­ valve, and for whatever clearance was I’ve been downright happy with many mental Ceconite. Anyhoooo.afterwork- needed for the head and exhaust. Now other aircraft over the years, but this ing with Ceconite again, I honestly feel things are different! I spent a fair amount combination of Sig’s BIG Clipped-Wing that the bit of extra effort it takes to pre­ of time positioning and double check­ Cub and the potent, but quiet. Magnum pare the framework is more than offset ing the Magnum just to keep from .91S four-stroke are as close to being the by .. . (1) the outstanding strength and having to butcher that nice smooth cowl proverbial "marriage made in heaven" durability of Ceconite; (2) its depend­ . . . and I gotta admit that it was worth as anything could be. There’s more than able 10% shrink factor, which means the effort. Even though the carb had to enough power to loop from level flight, that it won’t turn reasonably well built be positioned so that I can’t get to the and that four-stroke "sound” is abso­ surfaces into pretzels; (3) the fact that, needle valve with the cowl on, I found lutely fantastic. Not only does Deesound unlike most other iron-ons, once taut, all my worrying was for naught; four- just like a full-scale lightplane as she this stuff doesn’t seem to need retouch­ strokers seem to have such b-r-o-a-d putt-putts overhead, but the greatly ing or reheating; and (4) it looks so real­ needle valve tuning that backing off a reduced engine noise level will go a istic because it is the same material used tad on the rich side from optimum gives long, long way toward keeping non­ on real birds. an easy-to-start, reliable running engine modelers happy . . . which, in turn, will My messed-up spackle-like finish was . . . that barely needs any more messing help to keep many flying sites. not the fault of the covering, nor of lerry with for a while. I also found that a four- Sooooo, we’ie going to see a lot more Nelson’s "Filler Coat” primer. I got ex­ stroke will stop running almost immedi­ in the way of BIG four-strokers because cellent results applying the filler with an ately if tweaked too much . . . unlike its you don't need a chainsaw or weed- old sponge brush and found that it did, two-stroke cousin that can easily damage trimmer engine on a 20-25 pound air­ indeed, fill better than many coats of itself by continuing to run when too plane in order to enjoy the magic of BIG dope. I haven’t gotten around to trying it lean. Birds. A .90 or 1.2 four-stroke mated to on any other kind of covering, but it I was initially concerned aboutstarting an 8-foot, nine to ten-pound CAP 21 or should do equally well. The primer is the Magnum as the engine couldn't be Zlinn w ill produce lots of snap and zip ready for sanding in about an hot* 1 and choked, nor was priming through the . . . while the same engine on a bird like is easy to work with; what’s really dandy longer, curved exhaust very practical. this 14-1/2 pound puddle jumper will fill is that it can be thinned (for spraying) Usually, heavy choking, followed by a the bill for “ older” guys like me. In and cleaned up with plain old tap water. flip clockwise, gets a four-stroker run­ either case, you w on’t have to build I ended up liking everything about my ning; however, as my carb was inacces­ differently, stress for the kind of vibes finish . . . the Ceconite. the light blue sible, an electric starter took care of that the bigger gas engines have, or mess and orange with white pinstriping, and chore very nicely. with the size engine that, logically, the filler; everything, that is, except the And I learned about plugs and fuel, intimidates many modelers. This Cub’s bad case of acne my attemptsat spraying too. Although most instructions specify ability to perform so well on "just a .90” had caused. a particular plug for optimum perfor­ is no secret; she's got a wingloading of My "first" in the power department mance (usually made by the engine 26 ounces per square foot, which is was a real education; instead of using manufacturer, would you believe). I've mighty light for a BIG Bird and effectively the ignition converted Fox .78 which I found, as most other four-stroke owners jacks up the power loading. The end had originally planned on, my new have, that there is virtually no difference result is an airplane that flies on her

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

Gemini M.T.S. Sunrise...... Continued from page 16 (a s u p e r io r M u l t ip l e Ta s k Sa il p l a n e ) straight with each other. Now the wings are ready to join together. Standard Class R/C sailplane for Pin one wing section to the building sport, F3B, and AM A contests board, being sure to have some wax paper underneath so that you do not Specifications: glue the wing to the plane. Mix up some COMPLETE KIT WITH Wing span 100 in. five-minute epoxy and apply it to the Wing area 930 sq. in. PRECISION CUT PARTS. Flying weigh t 44 oz. ALL HARDWARE. AND other section. Butt the two sections to­ Wing loading 6.8 oz. /sq. ft FULL-SIZE PLANS gether making sure that this section is Wing section MB-253515 also blocked up the same distance as the (15% semi’symmetrica!) $ 9 9 ? 5 Max. ballast 4 lbs. other. With the two wings together, you can now epoxy the 1/16 ply dihedral braces in place, as shown on the plans. Pierce Aero Co. Trim the center ribs to fit. and epoxy in. 9626 Jellico Avenue, Northridge, CA 91325 Phone (213) 349-4758 Let the wing dry at this time, but do not remove it from the building board. passed on to me by other four-stroke When everything is dry. you can glue on INDOOR MODEL SUPPLY lovers that seems to be the gospel: these the top trailing edge (1/16 x 1-1/2). You ENDURANCE RUBBER MODELS engines like props with wide blades and can also glue on the top leading edge THE EASY B" 3 IMS Gliders » *" So*n perform better with them where it sheeting as shown. counts . . . in the air . I intend to cut down Now, remove the wing from the plans, that cut-down 17-6 to a 16-6 and see how and turn it over so that you can mount well a real paddle-blade does. the 3/16 x 3-1/2 x 3 ply landing gear mount onto the bottom of the center FLAPPING FLYER 3 PARLOR PLANES Please don't let the relatively light gross weight fool you into using low section of the wing. Make vour piece power servos and a 500 mah battery from a 3 16 plywood sheet. Cut out a pack. The Cub is aerobatic enough to hole the size of the gear mount in the need the muscle of at least 40 oz-in bottom of the center section. Location is servos and the capacity of a 1000 mah or shown on the plans. Insert the mount 1200 mah pack; otherw ise y o u 'll be but do not epoxy at this time. Turn the playing the “ can’t w in" game of Russian wing over and block up both tips. This Roulette. . . . makes sure that the gear mount is level Again, let me point out that this is a and flush with the building board. Now really good kit. I know that many reviews epoxy the mount into place. Cut a sound too good to be true and smack of piece of 1 8 X 1 '2 balsa stir k. trim to fit being a whitewash . . . which they are. and epoxy into place in back of the gear This one a in 't! Sure, the kit’s not perfect, mount as shown on the detail At this but I’d have to get down to the real time you can cut and epoxy in place the picky, nitty-gritty . . . and that’s not what 3/8 triangle braces as shown in the gear you want to read about. Does she build mount detail. easy, look good, and fly even better, is After all is dry, remove the wing from what you want to know . . . and I’ve the board, and turn it over so that you already given you the answer. I can’t can mount the Dural gear. Drill four think of any airplane. BIG or small, that holes in the gear and plywood mount. 13" MINIATURE SCALE AIRCRAFT KITS ea $6.95 would make a better trainer. She’s L sing 4-40 bolts and blind nuts, install OUTSTANDING DETAILS. 3-VIEWS & HISTORY the gear at this time. This has to be done .045" Strip Wood. Light Sheet. Hardware & Prop. stable, predictable, easy-to-see. and has Heat Transfers. Japanese Tissue a great body; you feel like you’re flying a before the top wing center section PLASTIC CYLINDERS in ALCO and HEATH sheeting can be glued into place. ALCO SPORT 1929 ZIPPY SPORT A.R.V. real Cub. Coordinated turns (rudder WATERMAN RACER 1921 HEATH PARASOL 1928 and ailerons) make her look smooth and After the gear is installed, remove and AERONCA K 1937 Span 16" Length 9" finish the sheeting on the lop of the INDOOR MODEL AIRPLANES by Lew Gitlow graceful, and slipping into a landing 48 pgs. 100 illust. (reprint) + FREE PLAN. . $3.95 (rudder and aileron opposite to each wing. Cut and install the top cap strips. PEANUT POWER by Hannan. 80 pgs ...... $8.95 other . . . also known as cross-control­ The wing is now ready for shaping and INDOOR BALSA PACK $6.95 P NUT PACK $6 95 sanding. Be sure to shape the leading JAPANESE TISSUE 10 Ige 5 col. ro ll...... $5.95 ling) can actually bring on tears of joy CONDENSER PAPER 2/$2.50 MICROLITE $3 25 and happiness. But please . . . she de­ edge as shown on the plans. RUBBER LUBE $1.50 BALSA CEMENT $1.50 serves more than just a common, vulgar­ After vou have sanded the wing to THRUST BEARINGS. Mini Dual or D ual...... $1.00 shape, vou can now fiberglass the center PIRELLI RUBBER .020 to .090" & .125...... $2.35 sounding, two-cycle, methanol-burner 6:1 WINDER $3.95 16:1 MARK 1 $11.95 up front. If you’re hep to taildraggers. section on both the top and bottom. For P-NUT CO-2 ENGINE $34 95 CHARGER $8.95 you probably won ’t need to read the last this I used two-ounre fiberglass, four P-NUT PROP PACK 4 props, shafts, w.&p .. $2.95 inches wide. I recommend using the Sig SCALE CYLINDERS 5 pack. 3/8& 1 /2 "...... $1.00 page about flying. If, on the other hand, I M S. P-NUT PLANS ALL 5. 10 sheets.....$15.00 "training wheels" have been your way finishing resin to glass with, for it is easier ADD 10% POSTAGE —MINIMUM POSTAGE $1.50 of life, don’t omit page 31: it contains to sand alter it has dried. Be sure to glass 1983 4 CATALOG 18 ILLUST. PGS. $1.50 some good poop. About the only thing I both sides of the wing. BOX C, GARBERVILLE, CA 95440 could add would be to crank two to At this time you ran make and fit the three degrees of toe-in on your mains: ailerons, but do not glue in the hinges. wing, just like the "Big Boys” do. I’ve yet to see where this w on’t turn a This is done after the wing and ailerons Almost forgot to tell you about the tiger into a pussycat. are covered. Make the ailerons out of prop I used, which was a Top Flite 16-6.1 I guess I was destined to wait all these two pieces of 3/16 x 1-inch balsa. Take also flew with a 15-6, a 15-8 and a 17-6 45 years for my own Cub because this kit the aileron horns and fit them into the (cut down from a Zinger 18-6). and and engine combination was never wing as shown. Leave a space of about an though all of these did well, the 16-6 was possible before. But it was worth the inch between the two horns at the clearly a better choice; the engine was wait cuz I’m in luv with my Cub! · center of the wing. able to unload and there was hardly any Next, lake the aileron material and indication of lugging, even when going drill a 18 hole in the edge of the through a loop. And here’s a tidbit material for horn attachment as shown 68 MODEL BUILDER on the plan. Cut slots in milling edge of the wing and the leading edge of the aileron material at the locations shown. AC/DC AUTO CHARGER Install the ailerons and sand off the end flush with wing tiji. Again. DO VO T N o. 4 0 0 5 B C l.I 7 IN PLACE Remove ailerons and finish sanding, THIS DELUXE HEAVY DUTY then cover the wing and ailerons. I AC/DC AUTO CHARGER IS finished the model with Super Mono- JUST PERFECT FOR SAFE. kote. RELIABLE. FAST Now that we have built the wing, let's CHARGING OF THE NICAD move on to the fuselage. .. . BATTERY IN YOUR PLANE. BOAT OR CAR. IT HAS ALL FUSELAGE CONSTRUCTION THESE FEATURES YOU To make the fuselage sides you will ASKED FOR: need five pieces of 3/32 x 3 \ 36-inch • Has adjustable rate - zero to six balsa sheets, Using the plan as a tem­ amps. plate, cut out two each of the top halves, - Charges 4. 5, 6, 7. or 8 cells. bottom halves, and wing saddle dou­ ■ Charges 250 mahr up to 1.8 ahr blers. Glue the top and bottom halves cells. together as shown. Make sure that the • Works from 1 lOv house current. • Works from !2v auto battery or gel top half is exactly 4-1/8 inches back from cell. the bottom half. See plans. $69.95 • Has equalizer circuit with pilot You can now cut the tank compart­ light. ment and cabin doubler pieies. These Astro Flight, Inc. • Has jacks for external voltmeter. pieces are made from 1/8 balsa sheet 13311 Beach Ave. ■ Use on boats, cars, planes stock. Also at this time, cut all the ply­ • Use on transmitter and receiver • Use for motor break in. wood and balsa bulkheads using the Venice, California 90291 patterns supplied on the plans. Make (213) 821-6242 sure that you drill a 1/4-inch hole in bulkhead "B ” as shown on the plan for be necessary for proper fit and clear- wing hold down dowel. When gluing in anc e. the fuselage doublers, make sure that Turn the fuselage over on its top. and you build one left and one right fuselage using 3/16 balsa, sheet the front half of side. Glue in all the tank compartment the fuselage making sure that the sheet­ and cabin doublers, as shown on the ing is cut cross-grain. Cut out the hole (ilans. Be sure that you leave a 1 8-inch for the front nose gear and sheet the BEECHCRAFT SKIPPER: Quarter-Scale. gap between the tank compartment bottom of the engine compartment. 90" wingspan, 1,200 sq. in. area, .90 or doubler (B-1| and the wing saddle Also, glue in the 1 /2-inch triangle pieces larger engines. Plans, $18.50 doubler and cabin doubler for bulkhead as shown in the plans. This will enable Other plans: BEECHCRAFT BARON MODEL 58: 2 < ; Scale-85 "B". Next, glue in bulkheads "B ” and you to later round off the front of the wingspan-1000 sq In (31 3 x6' sheers $15 00 "C " to one fuselage side. Only glue the fuselage to match the spinner, giving the Beechcratl Fin Insignia $2 00 BEECHCRAFT BONANZA A36: 2V» Scale-86 bottom jiart. not the top angled part, plane a more streamlined look. wingspan-1300 sq in (3) 3‘x6Vi sheets $17 50 this is glued later. Use a square to make Turn the fuselage back over on the Add $2.00 postage inside U.S. & Canada sure that the bulkheads are 90 degrees to bottom. You can now· glue in the bulk­ Include $2.00 for plan rolled In tube Overseas orders add $10.00 postage the fuselage half. After the bulkheads heads “ D " and "E” . Again, onlv glue the Alabama residents add 6% sales tax have dried, join the other side. Use the bottom half, not the angled part. After top view of the fuselage on the plans and everything is dried, start at bulkhead BUD CADDELL 1525 Badham Dr Dept. M. Birmingham. AL 35216 cut out the tank floor from 1/16 sheet "C ". apply glue to all the angled sides of 205 822-4312 balsa and glue into place between the bulkheads and slowly bend in the DEALER INQUIRIES INVITED doubler B-1 and B-2. You can now epoxy fuselage sides to the bulkheads. Add loge. Stop here and make the horizontal the 1/4-inch plywood firewalll into some moisture to the outside of the stabilizer. place making sure that it is square with fuselage as this softens the balsa and STABILIZER CONSTRUCTION the sides of the fuselage and that you allows it to bend more easily. This is Use the plans as templates and make have angled it down approximately two where Hot Stuff Super “ T" really helps, two front pieces and one back piece degrees for proper down thrust. because you do not have to hold down from 3/16 x 3-inch balsa sheet. Glue the Using your motor mount and the the sides very long. three pieces together and sand smooth. plans, drill all the necessary holes for the You can now glue in the 1/4 x 1/4 balsa Cut hinge slots in the locations shown. mount, throttle cable and steering stringers along the top of the fuselage Slide the horizontal stabilizer into place cable. Mount the motor mount with 4- between the bulkheads all the way back in the slot in the rear of the fuselage, and 40 bolts and blind nuts. Apply a small to the tail. Be sure to glue these a little bit place the wing in the wing saddle. Make amount of epoxy around the edges of higher than the fuselage sides. See detail sure that both wing and stabilizer are the blind nuts so that they will remain in on the plans (bulkhead "B ” ). When parallel to each other. If not. trim either place when you remove the mount. Cut sanded, a flat gluing surface can be wing saddle or stabilizer slot so that they out bulkheads A-1 and A-2 from 3 16 made for the 3/32sheeting. Cut and glue are. W'e recommend that you trim the sheet stock. Drill hole's in A-1 for fuel in the 1/4 x 1/4 balsa cross braces in the stabilizer slot. lines and cut out the bottom of A-2 fot cabin top as shown. Also, glue in the 3/4 Once they are aligned with each the shape of the* fuel tank. Install the fuel X 1-inch windshield block. Do not shape other, you can now' cover the horizontal lines and tank at this time. Glue into at this time. Trim the 1/4 x 1/4 balsa stabilizer leaving bare the parts inside place as shown on the plan bulkheads stringers attached to the fuselage at the the fuselage so that the epoxy will A-1 and A-2. with A-2angledslightly for­ back so that they fit together evenly and adhere to it. Epoxy the stabilizer into ward as shown. glue. Do not glue the bottom pieces to­ place and bring the bottom rear fuselage From the 1 2-inch balsa material left gether at this time. They are joined after pieces together. Pin these until the over from the wing tip bloc ks, cut the the horizontal stabilizer is glued into epoxy has hardened. Again, make sure two side cowl pieces and glue into place. place. that the stabilizer is parallel to the wing. At this time, install the nose gear and Starting at the top of the fuselage, at Adjust as necessary. If you like, the the control c able. Some trimming ol the· the windshield block, sheet cross-grain stabilizer can be braced with some steering arm and the side cowl block will with 3/32 balsa to the rear of the fuse- scrap 1/4 x 1/4 balsa sticks.

JANUARY 1984 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 69 FRANCIS SMITH’S SHIP YARD BOX 118 NORWOOD. PA. 19074

( CONSTRUCTION PLANS A VAILABLE) (AS FEATURED IN MODEL BUILDER MAGAZINE) 9 5 ’ PATROL BOAT 85’ HARBOR TUG 4 8" LONG 10.5· BEAM Price$250.00 36"LONG 10.5" BEAM Price $225.00

All wood kits saun from aircraft quality birch plyuood, spruce and first-grade balsa...one piece plyuood Keel, plyuood Bulkheads, plyuood Main, Middle and Bottom Decks. ..All plyuood Super­ structure.. .HARBOR TUG: Balsa planked; PATROL BOAT: Plyuood sheeted... Portholes, Stanchions, Guard Rails, Rudders, Tiller Arms, Skegs, Struts, Stuffing Boxes, Drive Shafts, Propellers and Fittings are furnished...All Deck harduare is pre-cut, ready to assemble from detailed drauings. FOR FURTHER INFORMATION, SEND SASE INCLUDES SHIPPING U.S.A.

Once this has dried, you can sheet locate the hole for the front 1/4-inch the holddow n blocks for 1/4-20 threads. cross-grain the bottom rear of the fuse­ wing hold down dowel. Drill a 1/4-inch Remove the wing and drill the holes in lage with 3/32 balsa as you did the top. hole and epoxy the dowel in place. Use the wing slightly larger for the 1/4-inch After all has dried, trim the 3/32 balsa details on the plans for references. nylon wing bolts to pass through. Tap sheeting top and bottom flush with the Cover the fuselage and the ailerons the hold down blocks. Hot Stuff the fuselage sides. Sand the fuselage sides, and hinge the ailerons to the wing. Be threads and retap. top, and nose to shape. Finish sanding sure to use epoxy when installing the Place the rudder on top of the fuse­ for covering. hinges. I also recommend that on all lage, and with a soft pencil draw around At this time, install the wing hold control surfaces that you drill a 1/16 hole the part which is to be epoxied to the down blocks as shown, as well as the through each hinge and pin with a fuselage. Cut away the covering inside triangle stock gussets on top of the toothpick using some Hot Stuff as the of the line. Be careful not to cut into the blocks as shown in the detail on the adhesive. This should be done on the balsa below the covering. This gives you plans. ailerons, rudder and elevator. a good wood-to-wood bond. Mix some ELEVATOR CONSTRUCTION Locate the holes for the landing gear five-minute epoxy and lay a bead along Cut from a piece of 3/16 x 2 x 36-inch and install at this time. Before you cover the bottom of the fin and place it on the balsa one elevator strip 1-1/4 x 21 inches the fuselage. I recommend that you mix fuselage. Use small pins to hold it in as shown on plans. Round the edges and some resin and give the engine compart­ place while hardening. Using a square, cut the slots for the hinges in the loca­ ment two coats. This helps to fuel proof lay on either side of the fin and on the tions shown on the plans so that they the wood. Cover the fuselage. I always horizontal stabilizer to make sure that match those you have already cut for the cover from the bottom to the top. That the fin is perpendicular to the stab. horizontal stabilizer. Cover the elevator way when someone is looking at your Hinge the elevator to the horizontal and set it aside. covering, the seams cannot be seen. stabilizer and attach as earlier described. FIN AND RUDDER CONSTRUCTION Drill the holes for your engine in the Attach control horns at the locations From the remaining pieces left over mount. Attach the mount to the firewall. shown on the plans. from the horizontal stabilizer construc­ At this time insert the nose gear in the To make the pushrods for the rudder tion, cut out the two vertical tail pieces. steering arm and insert in the bottom and elevator. I use a 1/4-inch dowel. I Cut the hinge slots as shown and sand to hole in the mount. Push up enough to measure theapproximatelength needed shape, rounding the edges. Trial fit the slide on the 5/32 retaining collar. Slide for the rods and cut. In each I drill a 1/16 pieces together using the hinges, and the rest of the nose up thru the top hole hole all the way through the dowel finish sanding. Note the gap between in the mount until flush. Slide the 5/32" about 1/2 inch from the end, and then I the rudder and the fuselage for move­ collar to the bottom on the mount and cut a lengthwise slot from the hole to the ment clearance. Separate the rudder tighten. Slide the steering arm up to the end of the dowel approximately half­ from the fin and cover both. After cover­ mount and tighten the screw. Attach the way through and round off the end. I ing, you can permanently hinge these engine to the mount. then cut the 12-inch DuBro rod with pieces together. Be sure to use epoxy on Slide the wing into the wing saddle clevis in half. Using Hot Stuff, I insert a the hinges. and measure for the holes in the rear of length of the wire rod (with L bend) into FINISHING THE MODEL the wing for the wing bolts. Drill the two each pushrod end and wrap with heavy Place the wing on the wing saddle and holes the appropriate size for tapping thread and apply more Hot Stuff. On the 70 MODEL BUILDER end with the clevis. I make a lazy "Z ” bend for the rudder control. The one for the elevator is left straight. Install the radio as shown and connect the control rods for the rudder, elevator, throttle, and steering. Install the wheels, propeller, and spinner. Competition-Proven To mount the servo in the wing, I cut a rectangular hole starting at the back of the spar just large enough for the servo OCTURA to fit into. I cut two piecesof 3/8 x 1/4 ply approximately 1-1/2 inches long and epoxy to the top of the wing. Using X-SERIES rubber grommets, washers, and •small wood screws, I attach the servo. Last but not least, I attach the w ind­ PROPELLERS shield to the fuselage. I use Hot Stuff for this. Cut the windshield from 5 mil clear plastic (acetate or mylar) using the X-trii SpeedLX-tra Performance! pattern on the plan. I like to attach the windshield last. That way I eliminate the FOR PERFORMANCE YOU’ LL BE PROUD O F ... chance of damaging it while installing These, as all Octura Propellers, meet the most exact­ the radio and other gear. ing requirements. Available now in beryllium copper. Bolt the wi ng to the fuselage and using Fit 3/16" shaft. Check your local progressive hobby the balance point marked on the plan, shop. ___ ( X 4 4 0 /3 RECOMMENDED check the plane for proper balance. If APPLICATIONS weight is needed, place it as far forward 3 5 OUTRIGGER < X445 X447 as you can. With a full tank of fuel, the 7 5 OUTBOARD 75 DEEP VEE

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDFR SENT YOU! 71 row band, double conversion . . . truly the first of the 1991 receivers to become available. I have a much-flown KP-7C transmitter which I know I can always depend on, and decided to do some testing of the new FM receiver with it . . . not in the CAP-20 initially. As a matter of fact, there was a lot of testing of a lot of radio equipment before it could be in­ stalled. I am using a dual receiver system, as mentioned in my article in the April 1983 issue of MB. I am more convinced that this is the only way to go with any large, expensive model. This required BUILD YOUR flight testing of two receivers, six servos, η and two battery packs. Even the switch OWN ROCKET harnesses were not exempted from flight testing. More about this later. MOTORS! After due deliberation, and some ιι WE CAN SHOW YOU HOW! advice from my friends Jack Albrecht The engine comes with everything and Dan Lutz at Kraft Systems, the servos you need to run it and maintain it. from chosen for the project were another •40 POUNDS plugs (Kavan No. 37 recommended) to recently introduced Kraft product, the tools. Being European, it is assembled KPS-28. This is one of the latest genera­ THRUST! completely using metric hardware, all tion of servos featuring ball bearings, A necessary wrenches, open and Allen, water tight case, sealed pot with carbon • 50Φ EACH! are furnished. There is even a small button wiper, coreless motor, and metric screwdriver used to set the valve splined output shaft. It measures 1.61 x • With a rock tumbler and some simple hand tools, we II show you how lo build YOUR OWN rocket clearance! Plug wrenches, and plug clips .83 X 1.39 inches, at a weight of 45g (1.6 engines in your own garage or workshop lor 115 to are supplied, as is an owner’s manual oz) with a claimed output torque o f. . . 1/10 the cost ol the commercially marketed motors. which includes an exploded view and get this, 60 oz.in. The reported speed is • INTERESTED? Just send us S2 00 and we ll mail you out brochure along with a WORKING SAMPLE ol an parts list. .4 seconds for 100 degrees of travel. electric igniter that YOU CAN MAKE YOURSELF Irom This model requires a spinner, of There is a large variety of output arms materials you'll find around the house which there are many available. My and wheels, and all mounting hardware TELL YOUR FRIENDS ABOUT USI We re Ihe 00 IT YOURSELF ROCKET people. choice was a CB Associates 3-1/2 incher, is furnished with the KPS-28, however, of excellent quality, as is the rest of no servo trays are available. As most of Write tu Department MB 2. The Telelllte Corporation the builders and flyers have found, the 11620 Kltchlng SI Sunnymead. CA 92388 CBA’s hardware, some of which was used at other places on the airplane. double grommet mounting method These spinners all use a heavy aluminum which results from the use of servo trays backplate for true running and balance, can also result in too much give under faci that this is a twin. It’s the sound . . . and a heavy plastic cone which is avail­ heavy servo powers and control surface we simply don’t have four-cycle ears! able in various colors. I did have to drill loads. Therefore, a single grommet From experience, most of us can tell out and retap an adapter nut, but that is mount, with the servos mounted directly what a two-cycle mill is doing just from to be expected for most large foreign to plywood or hardwood beams is rec­ the sound, and instinctively know when engines. I find that metric nuts and bolts, ommended. and was used. it doesn't idle properly whether it is rich taps and dies, are more readily available Two Kraft KB-4F mah batteries com­ or lean. Not so with the four-strokers. now in large hardware and automotive pleted the major components of the Initially, my FK-50 would die at idle, stores than they were a couple of years airborne equipment. With the servos maybe cough at me once or twice as it ago. being mounted out in the wing, re­ did, and I knew not whether it died rich My days of U.S. Air Force flying taught quiring the addition of 24-inch long or lean. I'm still not all that sure, but I me some basic facts of aviation, such as extensions, the subject of receiver de­ proceeded on the principle that you . . . there are tew things as useless as the tuning and subsequent glitches that adjust in any given direction, if you were runway behind you, and the fuel you did sometimes occur with these installations right, things improve. If not. they get not put on board. I like to carry enough was discussed with my friends at Kraft. worse! I was able to achieve an accept­ of the latter to land with the fan turning, And of course, there was the question of able idle, and to be able to kill it when even when I lose track of time. At first the two receivers being operated in desired by further movement of the look, there doesn’t seem to be much close proximity with some problems to transmitter throttle trim. What more can available in fuel tanks between the com­ be expected, as discussed in my original you ask for? article on that subject. As ii turned o u t. it At the top. the Kavan FK-50 is indeed mon 16-ounce units, and a giant 35- all turned into a plug in and go situation. impressive. Again, the sound is different, ounce import. But fortunately, one was I have experienced no problems with with a sort of tapering off in the sound as recently introduced. It is a 24-ounce either the long servo leads, or the close- you adjust its peak, until you reach the tank from Kraft Systems, with the same by receivers. This is with an internal rpm where the prop tips begin to sound distinct functional shape and fittings antenna also! off. Or, you can just watch to see how found on its smaller capacity tanks. This much effort your pitman is making to tank is just what the doctor ordered . . . However, this does not mean that hold the airplane ... a lot of thrust is one was procured posthaste and in­ such problems cannot exist, for example developed! The instructions say that stalled. the introduction of an ignition system 8000 rpm is maximum. Naturally, you RADIO into the loop could cause some funnies. have to do some matching of the prop to This is always an important considera­ Kraft System’s answer to that isashielded your particular model. M ine swings a tion, but more so for a large airplane servo extension, which consists of a four Zinger 20-10 at 7300, and seems to be the with the weight, speed, and expense of foot long length of shielded cable made best choice for this size and weight this one. One of my more practical up of three No. 22 conductors. The con­ model. One of my local friends flies his friends calculated the loading ol the nections have been made at ihe receiver FK-50 in a 33-pound Nellitz Cub: he CAP-20 as $330 to the st/uare foot! end: you determine the total necessary swings a 22-8, which gets that big yellow About the time the project started, length and attach the furnished con­ monster off in 50 to 60 feet, and will do a Kraft Systems released information nector at that point. For those of you loop from level flight. about its new KPR-8D receiver, FM. nar­ who prefer the single receiver route. 72 MODEL BUILDER with dual aileron servos, there is also a “ Y" connector to which two of these ex­ tensions may be added. In addition lo SWEITZER ENTERPRISES the shielding and possible interference P.O.BOX 834 , HILLSBORO. OR. 97123 suppression claimed for the shielded extension, you also gain the benefit of reducing the voltage drop caused by the resistance of the small wire normally PROUDLY PRESENTS ! used. As stated. I have experienced no problems with the long unshielded 90" WINGSPAN leads, but have since changed to the QUADRA POWERED shielded leads primarily to avoid the voltage drop. 3 Sheets — The Kraft number for the shielded 3 Ft. X 8 Ft. leads is 200-284, priced at $13.95. The “ V” harness. No. 200-037. is priced at $7.75. As funny as it may sound to the un­ \ 0 $ initiated, the installation of the radio system in a model with two cubic feet of fuselage space can be problematical. You just don't fill the cavity with foam w rubber and put things in the middle of it. HOG AND AHALF In this case. I made a plywood box for the receivers, with 1/4-inch plywood Designed and te ste d by DAVE WEIGANDT sides running along the side of the fuse­ c o m p l e t e WING SHOWN PRICE S 35.C O p.pd, lage and extending into supports for the MATERIAL LIST ■( Fiberglass Cowl and Accessory servo mount. Quite often, we find 8x10 COLOR PHOTO Package Available Soon) grommets, eyelets, and woodscrews PRICE INCLUDES MAILING TUBE »ADDS 3.00 FOR AIRMAIL furnished for servo mounting, as they ] were in this case. I don't feel quite comfortable with the wood screws, and know there are cheaper materials therefore resorted to something I have around, and maybe there are some that used often and which has never failed are easier to use, but I also know there VINTAGE R-C PLANS me, threaded hardwood. Hardwood are incompatibilities that can show up at beams can be readily drilled and tapped, the worst possible time . . . right when after which a drop of Hot Stuff is dropped you put on the final color. I for one don’t into the hole and allowed to set. The tap care to have to sand off a paint job and is then run through one more time, start over! 9 FT. WING SPAN resulting in a clean firm and secure Therefore, the tail feathers all received ALL RIBS 8 FULL FORMERS SHOWN ON PLANS 11 PLASTIC ENG.COWLS $ 9.90 PR. thread. In this case, I used a hardwood their coating of 3/4 oz. fiberglass, two CLEAR GUN BLISTERS $ 6.60 PR beam along the rear of the plywood coats of resin, two coats (one brushed A LARGE plan sheets — Plans $16 95 servo mounting platform, for screw and one sprayed) of primer, all with wet 6 f t . WING SPAN MODEL P B Y -5 A securing and lateral rigidity. Along the sanding in between, and they were E NGINE COWLS t 6.50 PR. R c T IS $ 12 9 5 front,I used blind nuts. A drop of white ready to be joined to the fuselage. This GUN BLISTERS I 4.50 PR ADD $2^0 POSTAGE glue on the bolt as it is threaded in locks being an epoxy-glass body, I have found CATALOG-OVER 50 PLANS $100 OEALERS WRIt E it in place under all conditions. In the the best material for joining, forfilleting, case of the KPS-28, and most other servo and for filling, to be Dave Brown’s 30- WORLD 0 WIDE grommet/eyelet mountings, you'll have minute epoxy. In the latter two cases, it is SID MORGAN to use No. 3 bolts for mounting. mixed with, you guessed it . . . K&B 13157 ORMOND , BELLEVILLE , MICH ,48111 U.S.A. The Lite Ply top is secured with a num­ micro-balloons. The mixture is ready to Solartex has a weave, a texture not un­ ber of woodscrews: lightening holes sand after an hour or so in the California like silk or other light fabrics. It is quite were cut into all plywood pieces with a sun. and sands cleanly and smoothly easy to apply, works with a wide heat hole saw. The batteries were wrapped in with none of the gummy characteristics range, and is rather forgiving of mistakes. baggies, foam, and rubber banded to of many epoxies. Using this epoxy I was able to cover all four wing panels the firewall. The antennas come out of mixture and K&B primer, all joint seams, and the ailerons without a single wrinkle. the bottom of the receiver box, and run pinholes, and imperfections disap­ No preparation of the wing was neces­ through small fiber tubes along opposite peared completely and can not now be sary other than fine sanding, and vacu­ sides of the fuselage, coming within four seen under the final colors. uming. I have found the latter to be very inches of each other back in the tail. I The wings are something else. I would important when applying any iron-on had some reservations with this setup, have liked the type of finish available covering, as the fine balsa dust will in­ for reasons which I will explain when I with the above materials and proce­ hibit the bonding of the adhesive. The discuss the control system, but again, dures, but due to the area, I was con­ light color, in this case, yellow Super not a single problem with radio contact cerned about adding too much weight, Poxy was applied first, without any has been experienced to date. In every and started looking for some alternative wiping down of the covering with any way, the Kraft Systems radio has per­ system. I have previously successfully solvent. So far so good, now I let it dry formed flawlessly! married one of the film coverings on thoroughly . . . I gave it two days and FINISH wing and tail to a painted fuselage, with some sunlight, and it was ready for the Next to the ever existing question of good results, but in this case, as I was second color. what the color scheme is to be, the most after a painted wing, this wasn't possible. My evaluation of Solartex included important one is what and how it is to be About this time, I heard about Hobby some masking tests, using some of the applied. Over theyears, I have settled on Shack’s new Solartex, and I decided to common methods and materials. It K&B Super Poxy as my standard finish. It investigate it as a possible covering for seems to prefer vinyl to regular masking is easy to use, and even with hobby type the CAP-20 wings. After some applica­ tape, and while some lifting did occur on spray equipment and limited talents, tion. and painting tests, all of which it the final covering, it was minimal, and one can achieve a no-apologies finish passed with flying colors (ouch!). Solar­ was easily rebonded after allowing suf­ everytime. I use K&Balltheway through, tex was chosen as the best for this ficient time for the paint to cure, and by from resin to primer to color. Yes, I particular application. placing a piece of tissue paper under the JANUARY 1984 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 73 It must be pointed out however, that it MODEL IGNITION ENGINES & ACCESSORIES does not have the gloss of some of the plastic coverings, and the weave is still evident under the Super Poxy. Its advan­ tage is the fact that it accepts painting, and there would be more realism in its use on a model of a fabric covered air­ plane than would a slick plastic. I don’t believe that for me it will become a replacement for other coverings I have 77 Products now has NGK ME-8 m iniature spark plugs, used before, but is a welcome, new material to choose from. designed specifically fo r Model Ignition Engines. Threads and Hex size same as Modern Glow Plugs price is $ 5 .0 0 each, total To be continued next month. postage is $1.50 regardless of quantity. W ill f it most original Ignition Engines and all Modern Ignition Conversions. R/C Boats . . . Continued from page 21 CA TALOG A VAI LA BL E. $2.00 unrelated pieces, and arranging them (213) 329-0273 17119 SO. HARVARD BLVD., GARDENA, CA. 90247 into something of beauty. I have re­ ceived compliments on the appearance of my Begin-Air Trainer, and I take pride in the fact that I actually built the entire Eliminates GLITCH problems associated with long servo leads. thing myself. This is the true essence of model building. There are many of us • Eliminates need for voltage robbing chokes and other devices with who truly enjoy model building. It is to leads over 15" long this type of individual that the Begin-Air • Modern CMOS 1C technology Trainer will be of interest. • Uses less than 0.5 milliamps at 4.8 volts PERSONAL RECOMMENDATIONS STOP • Power lines are capacitor filtered I would recommend that anyone • Available in 4 versions with connector installed: building this model (or similar models $10.95 - Single Channel, single servo drive (Single) GS-1 like the Sig Kadet which employ plastic S12.95- Single Channel, two servo drive (Wye) GS-1 Y material for the front windshield) substi­ _ S14.95- Two Channel, two independent servo drive (Twin) GS-2 tute 1/32 plywood for the plastic. The ■ " 3 7 Γ Τ · ) · · S17.95-Two Channel, two servos per channel drive (Twin Wye) GS-2Y plywood will actually strengthen the ^EŽSB sS b BSI · Overall lead length is approximately 6" to 8" block in front of the wing, thus prevent­ 1 * · Modeler must furnish own longer extensions as required ing it from breaking loose if the wing SDecifv R adio S1.00 Shipping and Handling on Pre-Paid orders, add should catch in grass or on water. w ’ 6% for California residents. Mastercharge and Visa. Ground loops, or in my case water loops, 6175 PALO ALTO DR.. ANAHEIM, CALIF. 92807 (714) 637-2161 are not that uncommon when landing in windy weather. On the Begin-Air Trainer the plastic windshield serves no real iron as it was passed over the covering. corner and pull it back over itself .. . scale purpose. The view into the cockpit Thus, the masking process, which took a never pull masking straight up! K&B area only reveals the fuel tank. I’ll full day, was done with vinyl tape. . .and Super Poxy must be unmasked before it probably replace my plastic windshield shelf paper! cures completely, though there is plenty the next time I catch a wing tip and break The finished paintscheme, an authen­ of time to do so before it gets critical. the plastic. If the plywood is painted tic one of a full-sized CAP-20 somewhere Still, with a model the size of this one, some dark color, it will look like a back there in la belle France, is extremely and with that much masking to take off, windshield. eye-catching. The putting on of all those it is best to paint one part (say, the wing) ABOUT THE FLOATS squares you see in the photographs is and remove all masking materials from it The float kit carries a $26.95 price tag easier than it looks, and was well worth before you paint the fuselage. with $2.50 required for shipping. The the effort. Each square is masked indi­ The fuselage received the same treat­ floats could be used on any type of vidually and entirely at one time, having ment with the tape and shelf paper as model aircraft in the .29 to .60 range. The been carefully and accurately cut from did the wing, with theexception that the float kit contains all the hardware re­ vinyl covered shelf paper. I have found letters and numbers were masked off quired to mount the floats to the aircraft the best one for our purpose to be with Fliteglass Liquid Mask. This pro­ except (he mounting screws. Like the named “ Con-Tact," which has a peel-off cedure is simple also, apply the Liquid airplane kit, the float kit consists of top backing similar to our model coverings. Mask to the area the design is to be quality balsa all hand cut and machined. Naturally, the dimensions and loca­ painted onto, transfer the pattern to the The construction of the floats is similar tions of the squares have to be estab­ masked surface and carefully cut it out to the fuselage construction. The floats lished from your reference material and with a new. pointed model knife. I have are asymmetrical and you will want to a base line has to be drawn on the found that Model Builder Products Uber remember to build a left and right float. surface. From here on in, the procedure Skiver, with its No. 11 blade, is the ideal It took me three hours to build this is similar to that used for laying floor tile: tool for this purpose. The circle seen in because I did one sponson . . . ah, make locate the first one and the others alter­ the photos was cut out with the Uber that float ... in an evening of building. nately to it. Be extremely careful with Skiver taped to the pencil end of a com­ To help in low speed maneuvering, I that first one, as any inaccuracy in its pass, and a piece of plywood taped in installed a rudder on the back of each placement will be maintained and in­ the center for the point to bear into. A float. To improve highspeed tracking creased throughout the entire scheme. light touch is required to cut through during take-off, I added a piece of On non-scale paint jobs, the same pro­ the liquid mask, though if you get a little spruce measuring 3/8 x 1/4 x 7 to the cedure could beusedtopaint rectangles, heavy with the muscle, it is not really a bottom of the floats. This acts like a keel diamonds, or any other flat-sided figures. problem, as only a slight scratch is made on the bottom of a boat. The strips were After all the squares and tape are in in the paint underneath, and it is filled Hot Stuffed to the Coverite. They are place, go over all edges once again to be with the color subsequently applied. positioned one inch away from (he sure that they are all down in place. One last word about Solartex. It went inside edge of the floats. These strips are Pulling the shelf paper masking off is on and accepted paint beautifully, and on the forward section of the float as this just like taking off any other. Start at a will certainly be used on future projects. is the part of the float that is in the water

74 MODEL BUILDER when the plane is on step prior to takeoff. .40-SIZE ENGINE RECOMMENDED N E W • T h e POW'RZOOM winch is tor the serious (Iyer who FOR FLOAT VERSION d e m a n d s extraordinary launching power for any sailplane, Although the Begin-Air Trainer is particularly F3B. scale and cross-country. Included is the anti-kiting intended to be flown with only a .25-size /a n ti-b a c k la s h brake. 2200 ft. of braided nylon 160 lb. line, manua I motor, I feel that a person interested in ‘°w drum foot brake. alieW specially engineered motor and much the float version would be better off m o re l it is capable of drum speeds of 5000 rpm while launchinga using a .40-size motor. The strength of 3 meter sailplane. You choose the speed when you select pulleys. the fuselage and wing of the Begin-Air Trainer is more than sufficient to accept the bigger engine. I experienced no problems installing a K&B .40 in my Begin-Air Trainer. It was necessary to obtain another motor mount, however, as the one included with the kit is intended for the .25-size engine. I believe the extra power is very useful when making water takeoffs. Once the airplane is off and flying, the engine can be throttled back. The Begin-Air Trainer w ill fly n ice ly at quarter throttle with the K&B .40. Although I've used K&B Marine en­ gines for years, this was my first experi­ ence with a K&B engine in an airplane. Because I was familiar with the carb on the K&B 7.5 Outboard. I was able to set * Plut shipping W riteorcatl for more infor mat ion the low speed needle valve on the .40 aircraft engine after a little fiddling around. Before attempting to fly the tion, I’d have to say I’m really hooked on airplane, I ran two tanks of fuel through R/C float planes. The Begin-Air Trainer the engine. This engine starts easily, has on floats has proven itself to be an FAI RUBBER a good idle, and with the needle valve excellent flying model. The one I’m SIZ ES: 1/4". 3/16". 1/8". 3/32" set properly, has a smooth transition flying uses only m otor, rudder, and 1/16". 1 mm thick (.042). between idle and full throttle. elevator control. I’d rate the flying BO XED: 16 ounces of rubber per box. FOR THE BEGINNER characteristics as excellent. There are a PR IC E: $12.50 per box, ppdin U.S.A. I wouldn't recommend that the be­ number of excellent trainer type model ginner start with the float version unless airplanes available, and I’ve flown a few (California residents he has someone with float experience to of them. The Begin-Air Trainer in my 6% sales tax) opinion ranks right up there with the assist him. I believe it is easier to learn Coupe deVille how to fly off of a hard surface. Although best-known R/C trainers. $23.95 plus UPS I haven’t flown my Begin-Air Trainer I did find out a couple of things that Finished Prop. with wheels, I know that it would work are helpful to know about flying the Very Very complete very well. After all, that's what Buzz had Begin-Air Trainer with floats. The first Send 504 for in mind when he designed the plane. hint was shared earlier when I discussed 1984/1985 catalog Once you have gained experience and the floats and thespruce strips serving as F. A .I. Model Supply confidence in flying off of a hard surface, keels. The other hint has to do with the you can always add the floats. use of elevator during takeoff. I was experiencing problems in getting the manner on a hard surface. SOME THOUGHTS ABOUT FLYING model to run in a straight line long COMPARED TO BOATING SOME SODDEN THOUGHTS enough to build up flying speed. The The Begin-Air Trainer is an excellent Many newcomers to model boating model would get up on step and just arrive at the pond for the first time with buy as a wooden kit. The quality of the when it got going it would turn right or material and its preparation is certainly engine, hardware, and radio installations left while still on the water. I found that that best can be termed "shoddy.” Most among the best this writer has seen. The by adding up trim prior to takeoff this finished model is very pleasing in ap­ of the time the boat runs rather poorly, if situation occurred less frequently. The at all. because of this inattention to pearance, and its flying characteristics only thing you must be aware of is the are excellent. details. If something goes awry with a need to feed in down elevator immedi­ model boat, the consequences are R/C float flying can be an interesting ately after takeoff to prevent a possible and exciting challenge to the flyer who usually not that severe. Such, however, stall condition. In discussing this with may not be the case if something goes has mastered basic R/C flying skills. I can Buzz Waltz, he informed me he used the heartily recommend it to anyone who amiss in a model aircraft. same procedure when he was flying his For a model aircraft to fly at all, close has considered giving it a try. full-size Piper Cub float plane. Now, if only we get some snow this attention must be paid to all aspects of Although water takeoffs presented installation: radio,engine, linkages, and winter . . . I can remove the floats and some initial problems, the landings were put on snow skis! · alignments. A boat will run even though and are great. I love to land on water. there might be some things not working You don’t have to worry about missing properly. In order for an airplane to fly. the runway, or landing too short or too Vagabond ... Continued from page 23 all systems must be working properly. A long. I fly off a pretty big pond, and have linkage failure in a model boat may yet to come close to running out of The good news is that all else fit really simply mean you have to row out and landing area. I also think that water is well. Now that one sentence looks a get the boat. A linkage failure in a model much more forgiving than hard landing little puny compared to the preceding airplane may mean you have to go out surfaces. I’ve bounced my Begin-Air lines complaining about fit, but what are and pick up the pieces. Trainer on a couple of water landings you going to say about stuff that falls in FLYING OFF WATER that would surely have broken at least place just as expected? Thanks, I sup­ If my first experiences are any indica­ the prop had I landed in a similar pose.

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 Vagabond very nearly out of sight. The only way you can tell the model is slowing is that it keeps taking more and BIG BATTERY CYCLER more rudder to keep it hauling straight up. With a fully lean setting, it will in fact CYCLE 600MA TO 4000MA BATTERIES pull out of sight vertically. It will slow down slightly, as it takes a touch of Now you can cycle your big 4.8 volt batteries with the same efficiency as our famous rudder, but by that time it is as close to Simple Cycler for smaller packs. The BIG BATTERY CYCLER gives you an audible gone anyway, so who cares? warning when your pack is deep discharged to the level recommended by battery With top end power assumed, the Fox manufacturers. Then recharge with your regular charger. You can easily determine still shines in a couple other areas. the percentage of charge used and remaining in your pack, as well as getting an early Mid-range torque is really good with a indication of cell failure. # RED 26, Only S24.95 broad spread of power. I normally fly • See your local hobby shop · All products made in U.S.A. with the motor on the fat side in an effort · Send a S.A.S.E. for full information, to make the manuevers appear as if they n a m 4736 N Mj|waukee Ave _ Chicago, IL 60630 were performed at a constant speed. Come in low and level with the motor IF UNAVAILABLE LOCALLY. ADD $1.00 FOR DIRECT ORDER. NO C.O.D. just loafing along, slowly pull in some up. as soon as the motor is loaded it kicks into a still slightly-rich two-stroke and landing gear blocks are located. The ply pulls that Vagabond through great, huge Box 1063 Lorain, Ohio 44055 has been further lightened with holes. m lU K W A * Phone (216) 282-8354 loops. On tbe backside of the loop, the You may be able to see drill starts in the motor (unloaded now) richens up again, Models upper edges of the gear blocks . . . Hey, and you hit the bottom of the loop Peanut Scale all those grams add up! All balsa blocks Piper Vagabond running at almost the same speed as including wing tip blocks were hol­ when the loop was initiated. Back up Piper Cub lowed. a trick learned well in C/L Stunt. Stinson 125 into the second loop, and it all starts Aft of the wing, the lower side of the again. It’s great! Outdoor kits each . . .5 4 .9 5 fuselage was built upas shown.the stock Light Indoor kits each.. .54.95 Admittedly, it is easier to use more used is 3/32 sheeting. Way back at the power for this and most other maneu­ tail, large holes were cut in all parts. vers, smashing into them with brute Sport Scale Models 22" S pan While I hate to do it. now is the speed and whip-lashing your way PC-6 Porter appropriate time. I suppose, to mention around. The Fox will perform in that Taylor Craft that after all this lightening. I still had to manner as well. I suppose it is my C/L Stinson Voyager add some lead to the tail to achieve background that keeps me going back Rubber or CO2 Power proper balance. Quit laughing! I figure PC-6 Porlar to the rich setting in level flight and then Kils each . . . $ 6 .9 5 that I still came out ahead in all-up listening to the motor changing pitch as weight, as the lead added to the tail is the demand for power comes up and Sport Models much less weight than that represented then eases off. An Embryo Model by structure closer to the balance point. The Fox is also very easy to handle. It with 18 ” Span To stifle those who may still be laughing, idled acceptably well from the first run. designed lo win! my Vagabond came out. ready-to-fly After an hour or so. the idle could beset for beginners and (less fuel) at 72 ounces. This with a Fox Experts . . . S6.95 lower, as low as any other motor in use at .45 (a motor with a relatively heavy case), our field. Hand starting, my preferred HARD-TO-FIND ITEMS FOR a 60-size Kraft aluminum motor mount, way of making noise, is easy. Hook up and an aluminum C.B. spinner. So there! YOUR BUILDING NEEDS the glow lead, pull the prop through Helping a lot in this "think light” until you feel a bump, pull it through Early Bird Tissue for Antique Aircraft ...... S5.95 scheme of things was the use of Hot Stuff True Olde Japanese Tissue. 10 in 3 colors . . . S6.95 one more time, and then flip with vigor. Japanese Tissue. 12 in 6 c o lo rs...... S3.95 and Super 'Τ' exclusively for all glue I am able to get one-flip starts at least Microlite P la in ...... $3.25 Silver ...... 53.95 joints. The only glue on this model that 80". of the time if I really concentrate, as Microfilm — 53.75 Glue — $1.60 Solvent — $1.25 didn't come from Satellite City was the in "I'll bet you a beer that you can't one- Condenser Paper, 3 sheets ...... $3.75 adhesive on the back of the Monokote. Plan Service over 17 Scale. Sport Scale & Peanut Scale Even the reinforcing cloth on the wing's flip that Fox again!” I can do it every Rubber Strip 020 thru 085 ...... each $1.75 center section is glued down with Hot single time. 3/32 thru 5 / 3 2 ...... each $1.95 Stuff (the cloth itself is 3/4-ounce K&B). When flying at the field, what I have Winder 6:1 ____ $3.95 Mark 1 16:1 . . . $11.95 just written is obvious to all in atten­ Complete Line ot Brown CO2 Motors For power, the Vagabond got a Fox .45 Balsa Wood Outdoor & Indoor Sheets & Strips stuck up its nose. Now. before talking dance. But their next comment is no Add 10% Postage — Minimum Postage $1.50 about the Fox, you have to understand doubt similar to what you are thinking, COMPLETE CATALOG $1.50 that Duke's motors have an interesting and that is, "The motor runs great and following. In many on areasof the world starts easy, but what about the carb?'' I If you have gotten this far. you are they are regarded as the best buy for the know that Fox carbs have a bad rep. I probably interested enough to have money, in the case of a couple models also know it is to ta lly undeserved. checked out the pics and have seen they are seen as the only way to go for Duke’s only mistake was in (years ago) where I cheated a lot in building this max power. However, in other areas designing a carb that was quite good at model. Most everyplace you look there people will laugh, or at least chuckle carbureting fuel, but that couldn't be are holes cut in parts. 1/64 ply substituted when you tell them. "It's a Fox motor." I easily adjusted by less-than-expert for 1/16 and so on. This is cheating live in such an area. You can fly for two modelers. I can remember many times, because to do a completely factual weeks straight and never see a Fox here. both in local contests and at the Nats, review, the model really ought to be In fact, your chances of seeing a for real stopping by the C/L Profile Carrier circle built completely stock .. . and I would fox, complete with baying hounds and and seeing Fox carbs adjusted to abso­ build it that way if I had the time to build sadistic, mounted "sportsmen" in pur­ lute perfection; dynamite top end, crisp a Stocker and then a tričko version. suit are greater than seeing a Fox engine mid-range, an idle so low it was sinful. Feeling favorably disposed to the someplace other than in the bottom of a But those three needle valves .. . each "light is right” credo, I slotted the ribs aft tool box. had an adjustment that generally af­ of the spar and cut a hole in them However, I am here to tell you this fected the others . .. some were just too forward of the spar. The use of 1/64 ply latest version of the Fox .45 ball bearing much for the average R/C flier, simple as has already been mentioned, and you motor is a runner! Even with a slightly that. These guys didn't have a clue as to can see it doubling the ribs where the rich setting, it will pull the 4-1/2-pound what they were doing, evidently couldn't 76 MODEL BUILDER read instructions. and had ears of stone. Duke unjustly got the blame, of course. "ANOTHER GREAT WINDER" The new carbs. as used on this engine POWER TO SOAR as well as all other Fox R/C engines, will IMPROVED (gradually) put to rest old prejudices. SMOOTHER TO NEW HEIGHTS You just install the needles to the setting suggested in the instructions and fire Li« - $64.95 that thing up. It will be rich, but that's Plus s hipping OK. In fiddling with the needles you will find that there is a suitably wide range of acceptable settings, particularly on the JOHN MORRILLS "SIDEWINDER" idle mix needle, but that a click or two either way will definitely change the Precision Built Heavy Duty Winder! note of the engine’s exhaust. The high T u rn C ounter k it - $18.00 speed needle is especially nice; fly the $1.00 FOR CATALOG LEISURE LT50 model a bit fat. land, and go in one click 0.10 cu. in equivalent glow engine dis at a time to fully lean it out in the air. JIM CROCKET REPLICAS placement. For two-meter sailplanes, or When close to the magic setting, each P.O. BOX 12600 sport scale aircraft. click will make a noticeable difference FRESNO. CA 93778 in power levels.a trait which I appreciate in fine-tuning an engine. control surfaces. So, any teeny little The operating instructions also detail thing, whether it is slow servo or an out- how to modify the taper on the end of of-tolerance stick I notice immediately. the high speed needle valve. This taper, Mr. Lutz says he became aware of this believe it or not. determines the mid­ months ago, and has taken steps to range mix as the throttle goes from low- correct the problem. KELLER 25 to high-speed and if you want this mix We are finally to the point where most richer or leaner. Duke tells you how to review articles tell you how fantastic the 0.2$ cu. in. equivalent glow engine dis­ do it. builder is (“ flew straight off the board, placement Hies am .19 to .25 powered The only problem I have had with the no trim required” ). Well, this Vagabond plane. For 100-inch sailplanes, and sport engine is the idle needle not being did take a little trim, but not much. A scale aircraft. Manufactured for Leisure by Keller Motoren of W est Germany. retained adequately by the "clicker” little fiddling was required, i.e. drooping fingers. A nylon tie around the "clicker” the ailerons, but that is actually a fine- device solved that nicely. tuning technique which we w on’t get While I am still experimenting with into here. I did get some terrific aileron props, right now I am using a 10-7 fiber- flutter the first couple flights, but this filled Master Airscrew that has been turned out to be caused by some soft, thinned slightly (do this at your own weak wood in the left aileron. With a risk), and the tops have been raked a new one installed there has been no KELLER 50/24 little. What I would really like to be using further problem. is a true fiberglass prop in 10-6 or 10-7 The model flies just about the way I 0.56 cu. in equivalent gloss engine dis­ sizes, but they seem scarce lately. Fuel expected, and wanted, it to. While it is a placement. The standard by which all other that works fine is Sheldon’s 10% brew Sport/Pattern model, as opposed to an electric m otors are compared Only 0 56 and I prefer (dare this be published?) a all-out Pattern job, the Vagabond leans cu. in. equivalent gloss displacement, but K&B plug. heavily to the Pattern side of the equa­ pulls like a .50! For F.5E competition The Fox does present a problem in tion with the “ Sport” designation imply­ sailplanes, or .-»O-size pattern scale planes. mounting; the case is huge. Luckily, I ing that some compromises in structure found that a Kraft number 200-206 metal have been made to ease construction Discover exciting electric flight mount fits perfectly, and after punching and keep the manufacturing costs down. for yourself. Send a self-addressed, the mount full of holes it was fairly light For instance, the canopy is favored by stamped envelope for our latest and still very rigid. Motors that put out many sport fliers, as is the use of solid power like this Fox does don’t deserve sheet tail surfaces. catalog and technical bulletins. anything less than a rigid mount. Still, the Vagabond is better than I am; The radio. Ah, yes, the radio. Let me it will do all those strange maneuvers in tell you about that. You see, the deal the AMA rule book, if only I can learn to to get a Vagabond kit for review had move the sticks the right way and at the L e i s u r e already been arranged with fellow old right time. Rolls are super, or at least 11 Deerspring Irsine California 92"Ί4 Ford lover, Dan Lutz (you really ought to they are now that I have taken the time see his beautiful roadster!), when he to fine-tune everything; just a slight after flying my Vagabond he is building asked if I had a radio for it. he was told touch of down when inverted is all that is one. I have already built and flown a that I had one, but the problem was it required to perform nice, smooth rolls. second Vagabond, this time with a Mac’s wasn’t a Kraft system. So, he loaned me Rudder action is great, even with the muffled tuned pipe on a second Fox .45, the K Line KP5K shown, mainly to keep model almost stopped at the topof a stall tail-dragger gear, more weight-saving the com petition’s radio from turning up turn, rudder will stick kick it over, you tricks, built-up stab, a little anhedral in in a Kraft model! The problem I am now never need to squirt it over with throttle. the stab, and Micafilm for covering. It faced with is that Eloy does the radio While the Vagabond is stable, it is also came out even lighter. 68 ounces, but stuff for MB . . . and I don't want to. Or nicely responsive, which helps a lot in a that's anotherstory for another tim e .. · can’t, depending upon whom you ask. couple of my favorite maneuvers: I can tell you that overall I like the square inside and outside loops, and radio. Very solid control, no interfer­ square eights. I like to do these with the Hannan...... Continued from page 55 ence problems of any kind, relatively bottoms just about eye level; any hesi­ fast servos and the dual rate is something tation from your or the model and we're color was ideal camouflage against I play with most every flight. Flowever, talking super stuff ... no relation to a cloudy overcast skies. the sticks are looser (not sloppy, just certain glue! A color profile of one such Spitfire loose) than I prefer. Again, this probably Here’s the bottom line; A flying appeared in the January 1983 Air Inter­ goes back to my C/L flying days where I buddy, Rick Cochrun, has never cared national. and it was em ployed as a had direct control of the model and its much for 40-size Pattern models, but reference in finishing the little Bentom JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 77 FOR THE BIRDS Mike Fineman, of Hamden, Connec­ TAKE IT OFF WITH ticut, sent in an article from the journal SPEED STIX of Science, along with the following comments: "Modelers of rubber-pow­ DISPOSABLE SANDING TOOLS ered scale airplanes are aware of the rift use WET OR DRY that exists between those who subscribe SANDING GRADES 100— 120— 180 to the Academy of Model Aeronautics rules and the much larger contingent REGULAR SPEED STIX that flies according to Flying Aces Club A * $4.85 9 STIX (1/4-3/8-1/2 diameter) rules. One important distinction is that the AMA continues to insist on rise-off- MINI SPEED STIX ground take-offs, while the FAC prefers B * $2.95 6 STIX (V8-3/16-1/4 diameter) hand-launched starts. Therefore, it NEW! f l a t STIX came as a surprise to discover in the PRECISION SANDING TOOLS C *$3.75 6Wedge STIX (3/4-1/2-1/4 width) Science article that a similar debate is 2930 SKYVIEW AVENUE currently raging among evolutionary ORDER TODAY!! POSTPAID!! PUEBLO. CO 81008 biologists, ornithologists, and other (DEALER INQUIRIES INVITED) Evenings call (303) 542-6200 learned types, about the ortgins of bird flight. In one camp are those who favor ballast inside the nose spinner, to shift the "arboreal” origin, i.e., that birds the center of gravity forward. The model were originally non-flying tree dwellers flies smoothly and impressively, and we that first evolved a crude kind of gliding found it an interesting change of pace that eventually was transformed into from the more usual stick-and-tissue powered flight (these are the hand- types. launched crowd). “ A newer theory, the cursorial, holds ITTY-BITTY MODELS that birds were originally ground-dwell­ Writing in his popular Indoor News ing critters that developed flattened and Views (Box 545, Richardson, Texas appendages as an aid to hopping. The 75080), editor Bud Tenny had this to say ability to become airborne would allow regarding the tiny (eight-inch span) these animals to patrol more cubic Piper Super Cub Pistachio Nut scale models flown at the % scale volume of airspace in order to hunt recent West Baden indoor competition: more efficiently for their insect dinners. Send $2.00 lor Catalog "The single outstanding thing which I Naturally, we can consider this theory remember about the Gran Prix was how the ROG theory, in model terms, as Ikon N’WST well the Pistachio models flew, and Dept. M.B. these animals started on the ground Butch (Hadland’s) was head and shoul­ and evolved a flight system that allowed P.O. Box 566 Auburn, WA 98002 ders above even many of the regular them to become airborne! ______(206) 941-8248______Peanut models in flying ability.” We "Alas, none of this helps to settle the wonder how the Reynolds number correctness of the AMA vs. FAC rules rubber-powered Spitfire shown in one fanatics will rationalize this? of our photographs. Sent from Japan by debate. While the AMAers might hold Ichiro Yamada, the kit features mostly PRONUNCIATION that ROG is more evolutionarily ad­ foam components, which may be as­ Saying aviation words and names vanced, FACers could argue that hand- sembled using the furnished contact correctly has long been a challenge, launched flight is more fundamental. . . cement or white glue. especially as many of us have only READ depending, of course, on which theory Spanning 19 inches, the semi-scale the names, and have not heard them you subscribe to.” model may be assembled in a single said by anyone in authority. A good CURTISS AEROPLANES evening. Ours was slightly modified as example is the model company name Thanks to Ken Hamilton and Max follows: The inner rear portions of the MEGOW, which we were surprised to Buchman, we are able to quote a few fuselage halves were lightened by re­ learn is supposed to be pronounced choice testimonials of satisfied custo­ moving excess foam wall thickness. The “ May-go.” In the case of the famous mers from a Curtiss factory sales bro­ vertical tail was reshaped to more nearly biplane manufacturer WACO, it is sur­ chure, circa 1920: "M y Curtiss JN-4 was resemble the Mk Xversionof the Spitfire, prisingly how often one hears it said like the first ship sold in the United States for and a hand-carved pilot by Joe Bickinella thetown inTexashavingthesame name. commercial purposes. It has had 125 was installed before adding the vacuum- (Texas town: "Way-co” ; biplane: "Wah- hours of actual flying time, and has formed kit canopy. Finally, the model co” ). But the most mangled of all model never had a forced landing or overhaul was sprayed pink. Finding a spray paint aircraft company names must surely be of the motor. We keep the ship in which would not attack the foam took a GUILLOW, which we’ve heard in many readiness for emergency calls, and bit of doing, and in fact took far longer variations. Thanks to Sears McCorrison, although I havethreegoodautomobiles, than assembling the model! we have a direct quote from Alson E. I consider the JN my most dependable The most unusual aspect of the kit is Smith, former president of the company, means of making long trips,” wrote Dr. the gearbox drive from the rubber which appeared in a recent newspaper F.A. Brewster. motor to the propeller, which e .bles interview: "Gull-oh” ! And this one: "A ll the flying I have the model to be wound by hand, yet is NEW AVIATION MUSEUM done has been in the Curtiss machine, fully free-wheeling when the power Bill Warner favored us with a news and I stand ready to tell the world that runs down. The propeller may also be release about the new Seattle, Washing­ the propeller does not fall off, and the replaced in case of breakage, and a spare ton Museum of Flight. Appropriately, engine did not even once hesitate,” is furnished in the kit. the organization is opening in a 1916 wrote Mary Roberts Rhinehart. Designed by Takao Igarashi, the Spit­ building which once served as the first SIGN-OFF fire is one in a series which includes a Boeing company location. Completely Ever get the feeling that the world is Zero, a Mustang, and a Messerschmitt, refurbished, the facility wil be devoted being overwhelmed by technology? which are now being imported. While to pre-1938 aviation history. Another Perhaps this quote from Woody Alien the wording of the instruction sheet is structure will house the post-1938 exhi­ will help put matters in better perspec­ rather quaint, to be charitable, the kit bits, in a room which will contain more tive: “ .. . the most advanced computer assembled easily, and the only trim aircraft than any other aero museum in in the world does not have a brain as adjustment required was the addition of the world. sophisticated as an ant.” ·

78 MODEL BUILDER Dealer inquiries invited

FULLY AEROBATIC

Kit includes - Epoxy fiberglass Standard Specs fuselage and canopy. Foam wings, foam rudder and foam full elevators, all with balsa sheeting VISA, MASTER CARD, Weight and instruction C.O.D. manual and all necessary hardware. allast system — includes 24 aluminum spar holding 23 < Postage and handling $2.50. Retail $119.95 Calif, residents add 6% sales tax.

AERONAUTICS INC. 20291 Beam Circle, Huntington Beach, CA 92646 eronautics

plan using shims to align the trailing Remember, the battery pack weighs 12 Ohm-y-gosh.. Continued from page 26 edge to prevent warping. Install short ounces and the motor weighs six. The filler spar sections between ribs to form equipment layout shown should balance speed trap measurement. Obviously, a the aileron spars, and add scrap filler on a 30 ounce model. Select matched diving entry technique would make a reinforcement at the hold-down bolts. sheet wood for the fuselage sides and more impressive figure, but it would not Notch the ribs on top where the longerons. Pre-assemble left and right calibrate the aircraft. aileron torque tubes pass through, and hand sides with verticals and longerons. Locally adopted race rules favored a relieve the aileron spars for the hinges. Mark locations of all body formers on six-cell pack as it was a stock configura­ Note the off-center location of the input the inside. tion. The race course layout was the arms of the torque rod. Keep the in­ Check to see how the sides bend AMA (provisional) 1/2A. 300-foot tri­ board end of the torque rods snug to around former C. Check the bend up angle with a 60-foot base between prevent aileron lash and possible flutter. side down over the top view. Mark pylons two and three. Winning times Attach the leading edge sheet from center lines on body frames to aid in were just above two minutes for a 10-lap the leading edge to the top spar. The alignment. Assemble the two sides race. Further refinement should see wing will now be stiff enough to be starting with frames C and D, then B. times under two minutes. A constant removed from the board tofinishaileron Align the sides over the top view before chord wing of 295 square inches was set torque rod installation. Don’t glue the cementing the tail post and motor as a minimum wing area in the spirit of torque rod at the aileron end yet. Mark mount. “sport” racing, just as “ Q-500” and its the bottom sheet with a pin by poking Assemble the top, bottom, and detail constraints have set standards for that holes through the sheet from the top parts per plan. The plv skid plate on the class. Stability of rules for any race class side. Mark the aileron outline on the fuselage bottom can be omitted if land­ seems to be a must for longevity of that bottom surface using a straight edge to ings are always on mowed grass. class. connect the pin holes. Don’t cut out the EMPENNAGE CONSTRUCTION WING CONSTRUCTION aileron yet. Position the torque rods and The tail assembly should be made of The wing features a fully sheeting finish gluing the back half of the top medium grade wood. The prototype was upper surface to maintain its shape, and sheeting and the trailing edge strip. covered with Super Monokote which is made full span using 36 inch long Next, poke a pin through the top was stiff enough to take sustained dives. stock. Full span ailerons may be simpler, sheet using the bottom holes as guides. Some cover materials tend to be more but for lighter weight, the plans show Mark the aileron outline on top. Add the elastic resulting in a flexible horizontal inset, conventional ailerons. tips and sand the entire wing to prep it tail prone to flutter. The horizontal tail is The suggested sequence of assembly for covering. intentionally large to ensure stable is to glue the ribs to the leading edge, Now cut the ailerons loose, and trim handling in pitch. Prefit the tail assembly bottom spar, and bottom sheet at the and sand them to fit neatly. Attach the to the body to check its alignment trailing edge over the plan. Glue the top ailerons after covering the wing and relative to the wing/body. spar and shear webs. ailerons separately. Avoid getting glue FINAL ASSEMBLY AND COVERING At this point, the structure can be on the hinge pins and use care to keep Position and align the wing and hatch removed, and the bottom sheet forward the toraue rod and hinge axes in line. on the fuselage. Tape the leading and of the spar and rib cap strips may be FUSELAGE CONSTRUCTION trailing edge to the body. Mark locations glued in place. Reattach the wing to the The fuselage is designed fairly stoutly. of the two wing hold down bolts, and JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL ‘EM MODEL BUILDER SENT YOU 79 save all of this fun by covering with one of the lightweight plastic materials. The completed model weighed 16.5 ounces. Just in case you have a pet model that you would like to scale for 1/2A Texaco, EPOXY RESIN CONTINUOUS FILAMENT here is how to figure the dimensions. All you mathematicians can leave now and • 525x4.6x3.7*3. · IO»ftlOx7.ll*6 * · GIANT SIZES come back for the flying in the next 7x4. 7x 55 $4.95 3 BLADE $14.95 18X8.18X10 $34.95 paragraph. For years, whenever I wanted LEFT or BIGHT HANO. • 8x4.8*6 8*8 · 12.6*6 Military 20X8.20X10 $39.95 9*4.9*6.9*7 $7.96 4 BLADE $24.95 22X8. 22X10 $49.95 to scale a model up or down to a new VO*TEX TIPS AVAIL • IOx4.10*8.10*8. · PITCH GAUGE · 1/2A and gum sites wing area, I would pick some wingspan 2 to 3 WEEK DELIVERY 11*8.11*7.12*4. up to 12in $79.96 straight ligand that sounded right, do the math, and see 12*8 $9.96 t'flht hand only what the results were. Most of the time I »«■lari invltad would do this trial-and-error exercise two or three times until I got the wing The , 1*9 0 3 · 4 6 9 * 3 9 2 8 tor M.C./VtSAACOO PROP or mall Cmh.CHack or M.O. to area I wanted. I knew there had to be a 10· Emerald St. *room fleld,Co. 8 0 0 2 0 better way. and there is. The magic formula is: tln ew wing area" = percen|ofo|{, mode, FLYING V old wing area Ohm-Y-Cosh is an intermediate de­ The Brigidier had a wing area of 445 sign requiring prior flying skill, but it square inches and a span of 55 inches. I is not a difficult model to fly. wanted 300 square inches so . . . 300 On the first flight, have the elevator divided by 445 equals .674 and the trailing edge trimmed up about 1/16 of “ Matched Performance System’’ square root of .674 is .821. Now .821 an inch above neutral. Hand launch times the 55-inch old wing span equals a for TOP PERFORMANCE firmly and with a slight nose up attitude. K&B ENGINES new wing span of 45 inches. See, it 16 Airplane · 4 Manne The airfoil used on this model has high works. k&b f u e l s k&b glow plugs drag at low speed, so don't let it climb The first flight of the Brigidier was 7 Bienos 4 choices too steeply after launch. Level it out as made with a Cox Blackwidow turning a “ Matched Finish System" soon as it is at a safe altitude, and let it 5-4 plastic prop, a half-full fuel tank, and for BEST APPEARANCE gain speed. a slightly rich needle valve setting. It K&B FiBEBGuASS CLOTH K&B M-cro-Baiioons Fil LE« The model rolls 360 degrees in about took off as if it knew just what it was Κ&Θ SUPER PCXV RESIN K&B SUPER ΡΟΧΪ THINNER two seconds which should be easy to K&8 SUPER POXx PRIMER K&B SUPER POXV PAINT supposed to do. Neutral elevator gave a K&B MIXING CUPS handle in the excitement of a race. nice climb. When the engine quit, full For aerobatics, consider mounting the up elevator trim produced a flat guide. ^ K&B MANUFACTURING motor battery flat against the bottom of 12152 Woodruff Avenue Five minutes later it was rolling down the - . Downey. California 90241 the wing. The aileron servo must be runway. submerged flat into the w ing’s depth in The controls are set up so that elevator match drill the holes with a 1/8-inch drill this case; this will allow the model to travel is plus or minus 3/16 of an inch, at right angles to the top surface of the achieve a more uniform roll rate. Bill and rudder throw is plus or minus 5/8of trailing edge and forward hatch. Thread Warner made a version which used this an inch. The landing gear has about two the hold clown plates in the fuselage feature with a fixed wing and battery degrees of toe-in. This is supposed to with an 8-32 tap. Now ream the corres­ hatch on the fuselage bottom. make tail draggers take off in more or ponding holes through the wing just Electric powered flight is a very enjoy­ less of a straight line. It seems to work. large enough to pass 8-32 nylon bolts. able alternative to the usual form of The next flight was made with a 6-4 Place a drop of Hot Stuff (or Zap, etc.) flying, and best of all, it allows the use of wood prop and a full tank of fuel. The into each wing hole. This will harden the many flying sites which would otherwise engine run was right on three minutes wood to resist compression loads and be unusable. · and the altitude gained was almost outof wear. Treat the threaded holes too and sight. In fact, with two of uswatching, we retap the threads after curing. Brigidier.... Continued from page 38 lost sight of the model twice. I had to Fully sand all surfaces and remove all spiral down to regain visual contact. dust to receive the selected covering drilling a hole in the needle valve and Fortunately, the white fuselage would film using the manufacturer’s instruc­ soldering in a short piece of 1'32 music flash in the sun each time the model tions. Attach the tail parts and rig the wire. The engine was held in place by would make a turn. The flight would elevator controls. The pull for off switch four 3-48 screws and blind nuts. have maxed out at fifteen minutes, hut installation is depicted on the drawing. The control surface hinges were made my neck gave out before the lift. Full Some trimming of the dacron v-control from Rocket City nylon strip hinge down elevator trim brought the Brigi­ string length may be required to desen­ material cut 5/16 of an inch wide, if you dier down. sitize the shut-off point and still func­ have never used these extruded nylon Subsequent flights have been made tion reliably at full down. When satis­ hinges, give them a try. Use a number 11 with different fuels and prop combina­ fied with the adjustment, apply a small blade, cut a slot the thickness of the tions in an attempt to gain maximum amount of Hot Stuff on the dacron blade, push the hinge in place, and then altitude with the longest engine run. I do string knots. add Hot Stuff. There is no open hinge not have the answer yet. but do not be PREFLIGHT line, so the glue cannot run in and lock afraid to try low or no nitro fuels and Check all control surfaces not only for up the hinge. Simple, fast, clean, and props of seven or eight-inch diameter. deflection, but also for proper direction. effective hinges are a real pleasure! So far. I have enticed a dozen local Place a soft, half-inch thick balsa block The m odel was finished w ith GM modelers to give 1/2A Texaco a try. in front of the motor battery. It will weight Silkspan and butyrate dope. To What more can you ask for. uncom­ function as an energy absorber in the save weight but still have color, the plicated rules, fast building, inexpen­ event of a crash. It may save both motor Silkspan for the wing and tail was dyed sive models, and a minimum of R/C and battery in one those sudden stops. purple with Tintex. When the dyed equipment. Build a Brigidier and join Restrain the aft end of the motor battery Silkspan dries, it is all wrinkled, but that the fun. · if you use a two by three cell stick is all right if you cover your models wet. configuration to prevent it from inter­ If you cover dry, it might be worthwhile fering with the aileron horn and links. to iron the stuff first. Of course, you can

80 MODEL BUILDER Tracks Continued from page 45 the weight would be 10-1/10 pounds, or Mighty Wire Bender better put. 10.1 pounds. "Now.” says Silli, “ if the bird flies off Finally! A bending tool that covers a larger spectrum the swing, what does the scale read? of craftsmen and modeler's needs. Does it read 10.0 or 10.1 pounds?” As I mentioned to Chickums. “ This is The K & S "Mighty Wire Bender"! It bends 1/4" really a dumb question. If the whole music wire, but will also bend square and rectangular shaped metal. Clamp the base in thing is sealed up tight, the weight has to a vise and you're ready to go. After a few be the same. The downward force nec­ practice bends, expert results can be essary to lift the bird is eventually trans­ achieved. Instructions and illustrations mitted to the cage floor, and then to the accompany each tool. gizmo ... I mean, balance!” From Items that can be produced with a little Chickum’s look of disgust, I deduced I practice are clamps, brackets, landing had goofed. Just using my head a little Stock No. 322 gear, hangers, etc. It is designed made me realize my error. An object in for maximum torque to handle flight .. . whether a bird, a plane, or most bending problems. Retail Price $19.95 Superman ... is not held up by an Send 25 cents for catalog invisible hand and arm attached to the and price list. ground. It is supported by an upward force generated by airflow over its lifting surfaces. When in level flight, this force K & S Engineering. 691 7 W. 59th St.. Chicago. II 60638 31 2/586-8503 is just equal to the object’s weight, which is a downward force caused by the mass attraction between the object’s mass and that of the earth. This is in accord with the findings of Professor Newton, who is famous for his apple-on- they are making the final approach in the-head routine. If the upward force is their landing pattern, just off the surface greater than the weight, the object they display a remarkably low flight path climbs. If the upward force is less, the angle and sink rate, even with engine object descends. If the upward force is off! Then, they apply full flaps with just zero, try model cars. enough down elevator to make a fairly The object in Silli’s problem is a bird. greased-in landing! We have stated the weight of the airtight The loon has similar flight character­ cage without the bird is 10 pounds. This istics and landing pattern, also going also includes the weight of the air sealed long distances dead-stick. However, the inside the cage. To satisfy Woody’s Purist loon apparently never learned the old Nick Ziroli’s F4U “CO RSAIR” flap and down-stick routine, for it makes A memorable W W II Navy Came# F.gnte* il t a superb fly·/' Corps, the cage displaces an amount of For 2 to 4 Cu. In. size Engines air equal to its volume, and the glass and a terrible landing at high speed with a GIANT R/C SCALE PLAN DESIGNS frame are microscopically thin, so the tremendous splash! I marvel that they AT-6 TEXAN” 2.4· =1 101 Span $27.00 p.p. U.S.A. FOKKER DR-1 2.7* = 1 * 63* T r ip · $25.00 p .p . U.S.A. weight of the air inside the cage is survive such landings . . . Silli just m ut­ F8F BEARCAT" 2%* = 1 86* Span $27.00 p.p. U.S.A. balanced by a force equal to that weight tered something about any landing is a CURTISS P-40" 2%*=!· »4* Spon $27.00 p.p. U.S.A. F4U CORSAIR 2'Λ* = 1 *3* Spon $27.00 p.p. U.S.A. by the displaced air. This fact is in tune good one if you can swim away from it Fiberglass Cowlings & Canopies are available also Send a stamp for detailed brochures on our Giant Scale Accessories with the findings of Archie the Creek, with your neck still straight. (Our Plans are sent Postpaid within ihe U S A.) about 250 B.C. So, to satisfy the above This kind of performance is due to NICK ZIROll 29 Edgor Drive, Smithtown N.V. 11787 mentioned WPC and still keep it simple, what is called “ surface effect,” or look at the following equation: "ground effect.” You will recall the is greater than that flowing forward on Cage + air - weight of displaced air = same thing happening with model air­ the lower surface. This effect is known as weight on balance = 10 lbs. planes, especially free flight sailplanes. the Kutta-Joukowski Circulatory Theory If we place the bird on the swing: As a lifting surface gets closer to the of Lift. Cage + air - weight of displaced air + bird ground, its lift is increased over that Another thoughtful fellow named weight = 10.1 lbs. which it generates in “ free space,” Bernoulli discovered before 1750 that When the bird flies off the swing, the where it doesn't sense the presence of a the static pressure of a fluid is decreased air weight within the cage is not changed, confining boundary, such as the lake if it is in motion at a given velocity. Air is but rearranged about the wing so that a surface, ground surface, or walls of a a fluid and the normal atmospheric sufficient difference in pressure exists wind tunnel. Twofinegentlemen, work­ pressure is about 15 pounds per square between the bird’s upper and lower ing separately, discovered the reason for inch, static. Therefore, if the wing is at wing surfaces to produce an upward this when they developed their revolu­ rest, it has a pressure of about 15 psi on force equal to or greater than its weight tionary Circulatory Theory of Lift, which both the top and bottom surfaces. If the of 0.1 lb. Therefore, the scale will read is to aerodynamics what the Tectonic wing is in motion at a given velocity, and 10.1 - 0.1 = 10 lbs when the bird is off the Plate Theory is to geology. Very briefly, the circulation velocity increases the swing and in the air! Chickums is smiling, this theory states that there is a normal velocity along the upper surface while now. Or is it a smirk? circulation about a wing in motion. Air decreasing the velocity on the bottom. Before the subject of birds is ex­ on the upper surface of a wing ap­ Bernoulli says the pressure will be hausted, passed by, or given up proaching the trailing edge will go greater on the bottom than the top, thus whichever best applies . . . have you down, then forward on the bottom sur­ producing “ lift.” This effect will be watched ducks land on the surface of a face to the leading edge, where it goes better described in a future article on lift lake? They are weighty birds for their up and aft to the trailing edge, etc. As the and airfoils in a proposed P&F&CT, so for wing area and, because of this high wing wing is moving forward, the velocity of the present, please accept the foregoing! loading, have a high level flight speed. In the oncoming air is added to the circula­ So, what’s with our ducks and loons? fact, they must maintain a high "flap tion velocity on the top surface and is As these birds approach touchdown rate” in level flight, and their flight path reduced by the circulation velocity on with their engines off, air isapproaching curves downward whenever they the bottom. This means that the velocity their wings at a high velocity with strong "coast” for a few seconds. Yet. when of the air flowing aft over the top surface circulation.The closer to the surface the JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL‘EM MODEL BUILDER SENT YOU! 81 happen with 32 ounces of O.·. or 40 Can you really afford to use less ounces of A. or the molecular weight of than the best battery packs made? any other gas, even water vapor. Isn't it SPÍ marvelous! Now. standard air is accepted to be 78.09“ N .. 20.95“.· O j. and 0.93“.. A. Let's

SR aerospace grade battery packs add up the products of these percent­ give you ages times the above molecular weights • 3 Times the Hying time in ounces. We get: 21.87 + 6.70 + .37 = • The ulimate in reliability 28.94 oz. • 80 Packs to choose from for This is also known as the equivalent transmitters, receivers, and molecular weight of dry air. At STP (32°F. electric powered cars and planes 14.7 psi). its molecular weight (mol. wt.) • Send a self-addressed, stamped in ounces will occupy 22.4 ft’, so the business size envelope for full details molecular weight in ounces divided by 22.4 ft 1 gives us an STP density of 1.29 oz/fť, or .0807 lbs/ft*. ΒΔΤ TtocS *NC BOX 287. BELL PORT. NEW VORK 11713 To apparently digress a moment, the Lehmberg definition of a standard is that tance to the model builder as it is re­ it is an accepted value for everyone to NO TIME TO BUILD? quired for the combustion of our en­ use as a basis for establishing another TRY OUR "OLD TIME" F/F-R/C AIRCRAFT standard, (It sure sounds like you got FULLY ASSEMBLED COMPONENTS gines' fuel, to provide propeller thrust, to provide lift and directional co ntrol. .. double standards, Fred, wrf) The aero “KLOUP KING” AND. if it were not so available for us to industry and NASA both use 59°F (15°C) breathe, we could forget all theabove. It as the standard temperature and . . . is required in the “ drying'' of our dopes strangely enough . . . 14.7 psi as the stan­ and the “setting” of some of our ce­ dard pressure. Therefore, as the above ments. Even Hot Stuff must have air with calculations were made at 32°F. they a little water content to set. There are must be changed to what they would be many uses for air. In fact, we are so used at 59°F. Now, stick with me on this, for anything that is good for you must hurt a IDEAL FOR BEGINNERS & EXPERTS to it that we take it for granted and 72" Span — 29 to 40 Engine Size (Less Wheels) ignore it. and we are very fortunate that, little . . . that’s what my mother used to 2-3 Channel Operation, or FIF tell me, anyway! Whenever you make a Quality Built Components of Balsa. Spruce & Ply unlike most people, it won't disappear Formed Spring Steel Landing Gear/Tail Wheel Assembly when ignored! The remainder of this calculation involving a temperature FULLY FRAMED - UNCOVERED $149.95 A(V! $8 00 Snw-M Harvfxvs P&F&CT will be devoted to air. sneakily YOU MUST CONVERT IT TO ABSO­ NEW' NOW IN KIT FORM WITH LUTE TEMPERATURE. There's one case FUSELAGE SIDES PRE BUILT avoiding the use of chickum tracks. A Th.» n » fed AM sa 00 SI future P&F&CT will be devoted to this that you don't, but forget that. The abso­ All A/C SA«po<3 U P S N o r· UTAH RESIDENTS lute temperature is based on the tem­ ADO SALES TAX light subject, for a knowledge of what it D»**f loQurriM inntM) does is very important when we try to perature where all molecular activity has bird gets, the greater will be the amount predict what an out-of-the-ordinary STOPPED. That is zero on every absolute o( air directed over the top surface, as model will do. Air is difficult to discuss temperature scale, and it's one standard the surface effect is making the trip over without the use of Chickum's expertise that doesn’t follow the Lehmberg defini­ the bottom surface more difficult. This with chickum tracks, but as my friends in tion. That temperature on the Farenheit increases the circulation velocity, further Yorkshire would say, “ Let’s give it ago !" scale is -460°. Now. if you ADD 460° to increasing the pressure difference be­ That 99.7 percent of good flyin’ field any temperature in degrees Fahrenheit, tween the two surfaces, thereby pro­ air . . . once your model gets away from you will have the temperature in degrees ducing more lift than would be obtained the contamination devices . . . is com­ Rankine. which you are to use in calcula­ at the same velocityin free space! It must posed of nitrogen, oxygen, and argon, tions. We w on’t discuss the centigrade be an exciting and heady experience for all elements. Nitrogen and oxygen are (or Celsius) scale for now . . . it's not re­ those birds! Come to think of it, the loon peculiar elements. Nitrogen atoms look quired. If European readers complain. may be holding off touchdown as long for other nitrogen atoms, oxygen atoms I’ll mend my ways. Let's return to the dis­ as he can, for he knows what will happen look lor other oxygen atoms, and then cussion in the preceding paragraph. at the end. they hold hands in pairs! They are now Thirty-two degrees Fahrenheit con­ Platz. Tony Fokker's top designer, called nitrogen and oxygen molecules verted to the absolute scale is 492°R must have skimmed a rock or two into a and are written N.· and O j. Argon is (32+460). and 59°F is 519°R (59+460). The German lake as he watched the ducks. straight, and is written A. Each of these density of .0807 lb s /ft1 at 32°F is temper­ His Dr.I triplane was a tricky craft to land, elements has a proportional weight . . . ature corrected to 59°F by dividing .0807 so he used a good-sized airfoil be­ atomic weight . . . which is equal to by 519 and multiplying by 492, which tween the wheels. To heighten the molecular weight for monatomic mole­ gives us a density of .0765 Ib/ft * at 59°F. effect, he even placed it at a positive cules and doubled for biatomic mole­ The value NASA uses is .07647 lb s/ft'. . . angle of attack! Platz used this feature cules. The molecular weight (alsoknown Chickums just commented that our on all his successive aircraft, the D.V, D- as mol. wt.) of N j is rounded off to 28. For calculations "ain't too shabby!" VI, D-VII, and the E.V, later called the Ο; it is exactly 32, and for A it is rounded Reviewing the above calculations D.VIII. The Sopwith Tripe had a simple off to 40. Now, prepare yourself for an brings up some things to ponder on. As spreader bar. I have seen Nick Ziroli fly amazing fact! eacli component that makes up air acts his Dr.I at the field maintained by the Take 28 ounces of N> and put it in a as though it occupies its own allotted Long Island Radio Control Society near box with a volume of 22.4 cubic feet. (To volume (by percentage) in the 22.4 ft 1 the old Gyrodyne Plant on Long Island. further make this amazing, if you are box . . . even if all components are It landed and took off BEAUTIFULLY. He European, read grams for ounces and thoroughly mixed . . . the addition of also flies a Sopwith. Is there a difference liters for cubic feet, the ratio is the same. something else, such as water vapor, in landing the two craft? How about As J. Durante often said, "You ain’t seen must displace the other components in droppinga line to Bill Northrop's"W ork- nuttin' yet!”) Now, bring the tempera­ relation to their amounts present. Let’s bench” about this matter, Nick? I love ture to 32°F. If you had the foresight to simplify this a little. The low quantity of your Dr.I . . . it is such a realistic flier! put a barometer in the box, it will read argon allows us to say that air is com­ Air has been mentioned, off and on. 29.92 inches, or 14.7 pounds per square posed of 79% N j and 21% O j. Therefore, during the foregoing, which was quite inch! This is called Standard Tempera­ if we have a box containing 10,000 mole­ intentional! Air is of particular impor­ ture and Pressure (STP). The same will cules of air (believe me. this is a TINY 82 MODEL BUILDER box!). 7900 are N j and 2100 are O j. No w , let’s scatter 100 molecules of water vapor into this tiny box . . . they must displace 21 O. molecules and 79 N> molecules, OU-BRO leaving the same number of molecules in the box, 10,000. Now, you will please BRASS PLATED DURA-COLLARS. Cat. No. 137 - 1/16“ Enough stock so that threads will not 138 · 3/32” note that besides removing the O j S o c k e t strip and can be re worked for many 139 - 1/8” needed for proper fuel combustion, this H e a d other uses. Sets include Allen Wrench. 140 - 5/32” will (because of the N j removal) also 141 - 3/16” cause a reduction in density, reducing B o lt Available in sets ot 4 $.80 per set propeller “ bite” and reducing lift. BALL WRENCH SET I heard that! I know I just heard a Fits 4 40 and 6 32 head Heavy duty snicker from someone, surely not wr/? bolts Leads into any cap Cat. No. 243 · 7/32” Whoever it was. I distinctly heard hifn screw head trom any angle 3 3/4“ blades 244 - 1/4” say, "If air weighs about 1.25 ounces/ft1 SI-00 -2 per set and water weighs 62.4 pounds/ ft ', how No. 132 S5.25 can the addition of water make air lighter?” (It must have been an Arlesian. D U * B R 0 ined and true spring NICKEL PLATED SOLDER LINKS Fred, they know all about water! wri) K W I K - L IN K S steel links are ideal lor Nickel plated links will not corrode and make an The only answer to this very logical any critical control linkage. attractive and easy to solder question is, "W hat does the water mole­ connector for servo or control cule look like?” It is written Η.Ό. When No t 09 (2) S.75 horn. No 112 $.69 Available with 4-40 thread Available with 4-40 thread we check on the atomic weight of H, we No 304 (2 )St 00 No 305 St 00 find that it is 1. Hydrogen,incidentally.is another biatomic molecule,so H: weighs SOCKET HEAD CAP SCREWS 8-32 NYLON FLAT & SPLIT/ 2, in any case. If we add 16 for the INSERT LOCK WASHERS atomic weight of oxygen (not 32 for O j), NUTS the molecular weight of water is 18. Once again, if wecould put 18ouncesof water vapor at 32°F into 22.4 ft*, the density would be .8035 οζ/ft*. Are you satisfied that water is lighter than a ir. . . as a vapor? No 3?9 To return to the problem of the 100 10 Per Package $1 00 water molecules, we have calculated the 9 per package equivalent molecular weight of air to be 28.94. Therefore, we can say that 10.000 molecules would have a weight in some unit of 289.000. Due to the mol. wts. of N j and O j being 28 and 32, and due to the fact that we have reduced the number of N_ molecules by 79 to 7821 (7900 - 79 = 1 I E W 7821), we have a relative weight of Nj of 218,988(7821 X 28 = 218.988),and because we have reduced the number of 0> V a s c a l e molecules by 21 to 2079 (2100 - 21 = 4-'/«” DIAMETER 2079). we have a relative weight of O j of 66.528 (2079 x 32 = 66,528). Adding these two figures gives us a total relative weight of N j and O j of 285,516 When the relative weight of 100 molecules of water at 18 each is added to this number, the total "wet” relative weight of air is 287,316 (285,516 + 1800 = 287,316). Com­ paring this to the relative weight of w h e e l s 10,000 molecules of dry air, the ” w et” air 8.00-4 Inflatable has a density ratio of 287,316/289.400 or .993, so it is lighter by almost 1%. Tires W ith Bolt Someone said, “ Big deal!" Well, this corresponds to a very pleas­ Together Hubs. ant flying day. in either summer or winter, when the temperature is 70°F and the relative humidity is 64V If you are drenched with perspiration and the “CUF3" wheel covers are made temperature is 80°F. the water content of lexan and can be painted with can double or triple. Under these condi­ any hobby paint if desired. tions the air density can be three percent lower. S'andard axle dia. is 5/32". If "Big deal?” cesired. hub can be drilled out You bet it is, for an endurance model, to 1/4" dia or one with marginal power! Theengine is supplied with three percent less fuel, Ϊ for if the O j is three percent less, the AUTHENTIC "CUB” WHEEL COVERS INCLUDED needle valve setting will be too rich and will have to be reset in order to maintain the proper fuel to oxygen (not fuel to DU-BRO PRODUCTS, INC. air) ratio for optimum burning. The big 480 Bonner Road Wauconda, Illinois 60084

JANUARY 1984 WHEN CONTAi ING ADVERTISERS, TELL ‘EM MODEL BUILDER SENT YOU' 83 rate. The lower density also decreases sive. the drag, but this “ help" is more than You’ll also want to use W hiffle Ballson offset by the "hindrance” . the ends of the rods to prevent them Do not try to relate moisture in the air from digging into the ground. What size to water injection to get better perfor­ Whiffle Balls you use will depend on the

Wing Are*--564 Sq" mance from an internal combustion surface you'll be flying off of. For asphalt engine ... it is not at all the same thing. and concrete, the size is not critical at all - ■ J V S < W l With water injection, the water is fed as a because small or large, they’ll slide liquid into the already mixed fuel and easily. If you try to fly off grass, use a air. W hiffle Ball as large as possible. Small To summarize, excessive humidity has W hiffle Balls on grass are almost as good The SENSOAR glider somewhat the effect on performance as as nothing at all as they will have a ten­ A HOBBY HORN Exclusive·! A HOBBY HORN Kit! an increase in temperature or altitude dency to dig in and catch, which leads to The SENSOAR Glider kit is a high quality kit with Machine cut l sanded parts. Select quality balsa does. An error most of the engine and tip-overs. and spruce. Detailed plans, and w ritten instructions. propeller testers make in their research For THERMAL or SLOPE or 05 ELECTRIC POWER. Another thing that is possible to try. VALUE PRICED at $16.00 is in not recording the temperature, but not as high on my list, is float gear off barometric pressure, and relative humi­ of grass. Personally I haven’t used floats, dity at the time of test. Correction of so I’ve got to be careful what I tell you. P l W Semi-Kits Combined with full stnpwood their data to a standard base would and plan. (Now incl. Wire. W in d o w , etc. Stat.) but I do understand that they will slide (Note: These may be purchased Just as semi­ greatly improve the value of the enor­ fairly well on grass if they are spaced far kits. or with plans write or call for prices.) mous and truly laudable efforts of the 1936 Buccaneer-84"-$5l; 1938 Clipper MK !-72"--$39 enough apart. In other words, if they are 1937 Da Uni re Spts’er-108"-S 6l; 1940 R anger-46"-$27 researchers. strapped directly to the skids, the base of 1939 M ercury-72"--$56; 1935 Miss Am erica-84"---$59 194i Playboy J r.-54*'--$29; 1941 Playboy Sr-80"-$46 Incidently. 22.4 cubic feet of air has support will be too narrow, with the 1938 Power House-84"--$43: I940 Sailplane-78" -$74 6.02 X 10-M molecules of all its compo­ 1940 So Long-50"--$28: I938 Trenton Terror-72'·-$32 vertical C.G. of the helicopter too high. 1939 2lpper-54"--$48; 1939 Korda W akefield-44"-$17 nents, whatever they should be. To Again, this will lead toward a ship that MIDWAY MODEL CO. Semi-Kits ČombineJ w 'strip 1936 Flying Q u*ker-84”-$49: 1937 Quaker Flash-67"$38 visualize the enormity of this number, will tip over too easily. If you do use 1937 Long Cebin-78"-S42. 1937 A ir Chlef-β ΐ" ------$40 you must first fix in your mind how truly floats, remove the conventional skids S T R U C K ' S 1 ΗΛΟ 74" Span, 835 Sq. in. small each is. Using the most powerful and crosstubes altogether, and use M A l l f m i i I a »SEMÍ'KIT (P,an lncl.)~$33.00 I16W rUICI Combo (Full) Kit ------$ 6 3 . 0 0 electronic microscopes they may be dowel rods bolted directly to the bottom SCALE PLANS and DRAWINGS detected. We all agree THEY ARE SMALL! 62". .60s $ 1 0 .0 0 of the fuselage which lead out to the S SO HEINKEL HE-IOOD. Out of the 22.4 cubic feet, cut out one SHIPPING AND HANDLING: 64 Page CATALOGUE floats. Up to $8.00 add $1.50. $2.00 P P /lst Class cubic inch. From this cut a tiny cube Once you have a system set up. use it $8.01 to $20.00 add $2.25, A copy w ill be sent barely containing the atoms comprising $20.01 to $45.00 add $3.00. free--when requested-- until you can make clean vertical lift-offs $45.01 to $70.00 add $3.50. with an order. one molecule. Do this with every mole­ and landings. Once you can do this, get and over $70.00 add $4.00. HOBBY HORN cule. Now, Hot Stufl all these cubes CA Addressees odd 6 % t a x . •»hobby specialties** rid of the training gear, it has served its Send MO. Visa/MC( *+Exp.) 1 5 1 7 3 M o r a n S t r e e t [ B ] together. How long would the string be? purpose. It's similar to the kid on the or Check (allow up to 30 P.O. Box 2212 days for check clearance.) W estm inster. Ca 92683 It would reach from the earth to the sun bicycle who uses training wheels for too j)COD=Exact Chargee ♦ $1.50 (714) 893-8311 J and a bit more, including a 6.33 million long and the wheels actually hinder his (714) 89S-1203 1 [| Hdl. (Cash O nly)[A ll UPS) mile detour to avoid a meteorite swarm! progress. He knows how to balance the This is assuming, of course, that the sun bike and can ride straight, but when he remains 92 million miles distant! turns the training wheels hit the ground RELIABLE ENGINES It is hoped that the reader found this and upset him. So don’t get too depen­ AT m onth’s P&F&CT interesting, under­ dent on training gear. If you see some­ REASONABLE PRICES standable, and raised some questions in body flying around in forward flight with his mind about air and our applications his training gear still on. he’s been too Midwest Model is the source for: of devices requiring its presence. Tem­ reliant on the gear! • IRVINE ENGINES FROM ENGLAND perature and pressure was to have been One thing I'll guarantee you is that covered, but space just didn’t allow it. As • H.P. ENGINES FROM AUSTRIA when the training gear does come off. the old movie script called for the your first few landings will feel like • COMPLETE STOCK OF SPARE PARTS redhead in the radish patch to say. you're trying to set down on the head of • COMPLETE SERVICE FACILITY "Tomorrow is another day!” a pin. The standard gear just seems so Dealer Inquires Invited Please drop a note to either the editor narrow after all of that nice, wide or this writer, c/o Model Builder maga­ support! WHITE OH CALL FOR MORE INFORMATION zine with your commentson P&F&CT. In There are some other contributing MIDWEST MODEL I particular, tell us what you would like to factors to this new sensitivity, which is see covered in future articles. I will not all psychological. When the training m b o x s o n b o m c o v a u a w m i answer all letters, bul please enclose a gear comes off. the helicopter will be SASE! lighter, which will give crisper altitude See ya in the chicken house, y’hear? control. The vertical C.G. of theship will word for this optimum ratio, stoichio­ Alfred Lehmberg be higher, so the rotor will have more metric, is a lot easier to write than "most 2646 Bolker Drive power over the fuselage. The last is a efficient ratio of fuel to oxygen required Port Hueneme. CA 93041. · combination of the other two; the for best burning” . Of course, when the weight of the gear dampens the input fuel is decreased to maintain the stoich­ because there is more mass (rods and iometric ratio with less available O j, the Choppers . . . . Continued from page 50 balls) farther out from the center of the engine will provide less RPM and less main shaft (mass times moment). Once power. This means less climb. As the air tac-toe pattern of rods with the two the gear is taken off, the dampening is density is lower, the prop doesn't have fore-aft rods on the helicopter's skids no longer available. Now that you’re set as good a "bite,” which further reduces and the two right-left rods ahead and with an appropriate area and suitable the rate of climb. This lower air density behind the main shaft. The only problem training gear, you're ready for some means lower lift, meaning more engine with the tic-tac-toe pattern is that it is help. power is required for level flight, thus, heavier than the X pattern, and could be ASSISTANCE there is less available for climb. So, any a w e ig h t p ro b le m on ma r g i na 11 v The least painful way to trim out a heli­ decrease in air density has a com­ powered ships. Whatever pattern vou copter is to let someone who can already pounded effect to decrease the rate of use, the best way to anchor them to the fly do it for you!. . . Even if you have to climb! On the glide, the lower density ship would be with nylon electric wire drive five hours one way to get some will reduce the lift and increase the sink ties. These are neat, clean and inexpen­ help. DO IT.

84 WHEN CONTACTING ADVERTISERS, TELL ‘EM MODEL BUILDER SENT YOU! MODEL BUILDER The SEVENTH Annual CONSUMER TRADE SHOW JANUARY 14 & 15, 19S4 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

msdjtu INDOOR DEMONSTRATIONS DISPLAY COMPETITION IN MANY CATEGORIES

TT·.-'

SEE INDOOR R/C SCALE AIRCRAFT AND BLIMP FLYING

ADMISSION: Adult admission is $3.50 per day, $2.25 for o n~ w r; a yuur 5a,eaDie items to the Swan ςκηη Juniors (under 18). Weekend passes $5.00 adult or $3.00 «·?■ « ° R ALER S, PLEASE! Ran, a w h < T Ä „ S M Junior. Children under 9 admitted free when accompanied " half a able fo, $2.50. in addition to (nnerat a d L i" i„„ by an adult Discount tickets woth 50έ available at most You are responsible for conducting your own sales IMS ňn* hobby shops within 500 mile radius of Pasadena. responsible for lost or stolen articles! MS 1

SHOW HOURS: Saturday 10 to 6, Sunday 10 to 5. STATIC MODEL COMPETITION: Entry is free, open to all ages, no lim it on number of categories entered, but one en­ « « « > ■ try per category. Trophies and ribbons awarded in over 40 GIANT RAFFLE: Radio control systems kite categories. Complete competition rules at your local hobby will be raffled off Sunday afternLn TieLt? ' 9,'nes' etc- shop, or write/phone IMS headquarters. show. You need not be pre»S to win ' °Π " ,β duri"9

INTERNATIONAL MODELER SHOW, BOX 127, COSTA MESA CA qoco-, PHONE (7141-548-4700 OR l 7 U U « . 0oo« ’ ^*> 2 / the contest day. If you are kind and then came the big moment. I was flying, courteous, most pilots are willing to help got it light on the skids, stabilized every­ a novice trim out his helicopter. thing. and lifted off into a hover. It What the "experts" are not tolerant of started to drift left, I gave some right is a ship that has been thrown together cyclic, no effect, more right, now it's with little regard for instructions, setup sliding right, give some left, more left procedures, or craftsmanship. In this . . . hey! This thing sure has slow cyclic case, the expert is essentially faced with control! I quickly found this out about rebuilding the helicopter. Don’t expect throttle and altitude control too. Up him to even attempt this at anytime. The anywhere to ten feet and back down to best he can do is run through things that two feet. To make a short story shorter. I must be improved before flight can even nearly cut down a few trees at the perim­ be attempted, i.e. (1) loosen up ball links eter of the yard before I got things back on their respective balls; (2) take any under control. Compared to our Jet- binding out of the swashplate; (3) make Rangers this thing was a pig! sure pushrods don't rub on the side This was really a humbling experience frames; (4) free up the tail rotor pushrod for me and instantly taught us that and bellcrank, etc., etc. sophisticated helicopters are more A ship that has been put together with difficult to setup, but much easier to fly. I great care, painted nicely, and fitted think you can see the point I'm making, with an engine which has been bench- so on to intermediate help. run before installation will be very INTERMEDIATE obvious. The expert can tell this right off, I’m going to stick my neck out a bit * 9 .9 5 which at least makes him feel that his and tell you that under certain circum­ easv'inev Line f|y'ng is the advice will be listened to. stances this is the best help you’ll get. easy, inexpensive wav into aeromode,ing,andj ^ lnto Hopefully, I've convinced you that the Why? Walker s famous models have first thing to do is obtain some assistance. Well, the intermediate learned how to been responsible for getting I’d like to look briefly at the three forms fly not too long ago. He still remembers & ,kidsin,otheS y . of help that you might find in your local what it’s like to struggle at maintaining a Whip-Power planes devpi- area. hover. Because of this he’ll be pretty årPethby ,he late Jim Walker, NOVICE patient with you and give you plenty of f'® the easiest and safest way ° ' f arn C/,L flying. No messy7 This would be someone that has just time to catch on. tuels or spinning props to dis- started, too. I would classify him some­ He has also flown a few different heli­ r i^ rf 9ets. Just a where between skidding around on the copters by now, so he’s quite aware that regular fishing rod or bamboo pavement and holding a completely they are all different animals. Which pole provides the power to controlled hover, ready for forward means that no matter which ship you perform loops, wing-overs flight. have, he’ll be very careful going over it and inverted flight. Develops basic aerobatic skills and If you have novice help that can’t fly, and checking it out before he flies it. simple modeling techniques at least the two of you can sit down and Another reason the intermediate is quietly and safely. compare notes and setup. You'd be good help is because he probably hasn't When you're ready for amazed how much the two of you can helped out that many novice pilots. He's powered flight, try the Fire- learn together. This is similar to what dad interested in teaching someone because baby II (19-1/2 in. wing) or the and I went through. Jr. Fireball (24 in. wing). Both watching a novice progress under his of these dynamite models use Neither of us had ever flown a heli­ supervision gives him personal satisfac­ any standard .049 engine. copter, yet we could double check each tion. See your dealer and ASK other and "argue" how things ought to Still another advantage of seeking the FOR THE AMERICAN be done. Of course. I could only go so help of the intermediate pilot is that his JUNIORS! far with dad because he owned the heli­ ships are still set up fairly soft, so he'll set American Junior copter and made the final decisions. .. . your ship up the same way. If his heli­ Heritage Models, Inc. If your novice help can hover, you are copter is not set upquitesosoft anymore, P.O. Box 505 best off if your ship is the same as his. at least he should remember that he Donald, OR 97020 He's found out what works with his heli­ needed his ship set up soft to begin with, (503) 370-7558 copter, and should be capable of setting and he’ll be sure to set your helicopter the same make helicopter up like his. up that way. If not available, order direct. Check, money order. Visa/Master- Where you might run into a problem is No doubt he’ll also have a good hold Card. please. Add S2.00 for where the ships are completely different, on all the critical mechanical aspects of handling and postage especially if one is fixed pitch and one is the helicopter. Sometimes with novice collective. I would advise you to proceed help these basics are not so well mas­ To make it worthwhile, plan on leaving carefully here, bec ause going from one tered. With expert help, you can expect in the morning, flying in the afternoon, helicopter to another can be a major the best mechanical knowledge in most staying overnight, flying the next morn­ change. cases. ing, and then driving back that after­ Another example: Dad and I had been EXPERT noon. Not only will you have a chance to flying our JetRangers with good success. Except for the usual exceptions, the fly with an accomplished pilot twice. We could both hover at will, fly around, expert will be able to look over, fly, and you'll also have that evening to think and shoot good approaches to a hover. analyze your helicopter quicker and about what transpired during the first We had just left novice and could be more effectively than the novice or day Sometimes sitting down and doing classified as intermediates. I had won a intermediate pilot. The expert pilot will some mental "flying” exercise can save Heli-Baby at a contest, and we were probablv be the most temperamental hours of actual stick practice. In the end, anxious to get it in theair. After all. it was help, too, because he’s used to doing you'll find the overall exposure so valu­ much less sophisticated than a Jet Ranger things accurately and correctly the first able you II want to do it again. and we wouldn't have any problems time, and has obviously reached his This is also a prime reason for attend­ with it. . .. expert level due to these good habits. ing helicopter contests .. . even if you We took it out in our backyard one He ’ll be less tolerant of sloppy setup and can't fly yet... CO! Save your questions night. (We had nice floodlights in the craftsmanship. There will also be less ex­ and write them down to present to the backyard so visibility was no problem.) change on a one-to-one basis, chances experts. And there is always some time We fired the Heli-Baby up and made are he'll be te llin g you what to do left to do initial trimming at the end of initial pitch and tracking adjustments. without expecting much argument. MODEL BUILDER 86 Lectro fy I BA o( Gvmatuj Power systems in stock for Lectro or similar sailplanes: All balsa, pre-built & sanded, ready for finish — the easy way to • Astro 05 Sport, 7 cells get into electric! Just join wings, • Leisure Pattern 05, 7 cells finish & install motor/radio — and • Geist 30/7 or 30/8, 7 or 8 cells outstanding flyer! Specs: 2 meter • Keller 20/7, 7 cells $195 .0 0 span · 3 channel (rud., elev., • Graupner Jumbo 550, motor) · for 7-10 cell systems. ______8-10 cells VISA

NEW ! Sanyo Red - “C utoff” cells - 800m a in a 1 oz. package about the size of A A wilshire model center cells! Latest technology — lightens w ing 3006 Wilshire Blvd. · Santa Monica. CA loading for sport or com petition. J 90403 · Phone (213) 828-9362 New W ilshire Catalogs! RC Sailplane and Electric Power specialists for the U.S.A. High Tech Sailplanes . . S2.50 Electric flight systems S2.50 Hours 10-5:30 Mon.-Fri. 10-5 Sat. Closed Sur1. There are generally two types of trying to take off and hover the helio. I experts. One has theexpert'sknowledge believe the helio is set up properly and ATTENTION 1/4 SCALERS with the understanding, caution, and balanced. I have experienced rolling EPOXY GLASS COWLS FOR: flexibility of the intermediate. He still over to the right upon take off. as well as NOSEN. PICA SID MORGAN. BALSA USA. PLAU. CONCEPT FLEET. HOSTETLER RCM T-CRAFT. SHEBER PIUS H Er % remembers how it felt to learn, even not being able to control it once it does SCALE. SUPER CUB. FOKKER 0 7. BOEING P-12 P-26. F4B2 though it has been a long lime for him get off the ground. I have checked and F4B4 SPARROW HAWK. GEE BEE MOD Ύ . MACBRlENS TURBULENT CHRISTEN EAGLE. BRISIGHELLAS STARDUSTER now. He’ll realize that what feels slow rechecked the helio balance, blade II. V, SCALE J3-BI BABY. FLYBABY Al RCAM PER PILOT and slightly sluggish to him will be what balance, blade pitch, as well as reset the JUNGM ANN 1 3.5 SCALE Ft OTHERS the novice needs to start with. The rotor swashplate several times. WHEEL PANTS FOR: rpm guide in last month's issue is a good "I don't have any vibration or carls CITABRIA. STARDUSTER II. PIUS. SKYBOLT. LIBERTY SPORT. CHRISTEN EAGLE P 6 E HAWK STEARMAN. STINSON SR-9. place to start, and he'll know how to use [troblems . . hale to admit it. but I just MULLIGAN 6 OTHERS it. This individual would be your best can’t fly it!" BRAZED b HEAT-TREATED WIRE GEARS &CABANES help without any question. ]. goes on to state that he’s looked for LARGE SCALE PLANS AVAILABLE The expert you'll have to watch out fot a helicopter club in the southwest Please send $1.00 for complete list is the guy who sets up ships one way, Chicago area, but hasn't found one. He We supply Modelers with fiberglass parts for your usually tighter than a banjo string (very would be willing to help organize a club plans—Write or call us: high rotor rpm), then flies like a wild- or at least get a list of the helicopter T & D FIBERGLASS SPECIALTIES man. As there is only one way to set up a pilots in the Chicago area. Please drop a 30925 BLOCK, GARDEN CITY. Ml 48135 helicopter by his standards, he'll set up note to ). and give him your name and PHONE (313) 421*6358 your training ship as close as he can get others who fly within a four-hour drive to his. This is the last thing you want. He of Chicago. Here's a chance to pass on wing; and the airfoil is the Eppler 205. has forgotten what it fell like to learn, our expertise, and trim out J.’s ship for Bob Dodgson. Tom Neilson, and Tom and/or expects it to come naturally for im. . . . Brightbill were at the FSF with their everybody else. Incidentally. ).’s letter is fairly typical Saratoga Windsongs, and Dave Johnson If you happen to have an expert in in that he’s built ashipcarefully,checked was there with his Camano TOO. All four your area that has forgotten what it felt and rechecked everything, but when it very aptly demonstrated that you don’t like to learn. I offer this very realistic comes to flying it. there is still some have to limit yourself to a bent-winger to refresher course: as most pilots fly doubt as to whether the ship is trimmed have fun or be competitive. double-stick, make a bet with him to right or wrong, or whether it's just the This was the first time I had had the learn to fly single-stick. Or. in the case of pilot going through learning pangs. opportunity to observe the Windsong in single-stick pilots, learn to fly double- Again, the above testimonial acknowl­ action, and I must say I was impressed! stick. This will literally make an expert edging the need for help is the best As you may know, the Windsong has the put training gear back on his own heli­ argument I can give novice pilots. Once Eppler 214 wing section with camber copter and slow the rotor speed down. the novice’s ship is trimmed out for a changing capabilities. The trailing edge In the end. the expert remembers w'hat smooth hover, he sees that his ship will of the wing can be reflexed (negative it was like to learn, and becomes a more fly. and now it's up to him to master it. flap) along its full length for those times versatile instructor because he can now What do you know, another month is when you want to scoot across the sky fly two different modes of transmitters. gone and I still haven't come to the toward that thermal you know is out Try it! subject of trimming out the helicopter! there somewhere. Yet. when you arrive, the trailing edge can be returned to WHERE TO FIND IT Next month for sure. Hope to see you then. · neutral, and you now have an excellent Where to find assistance, that is. To thermalling section to work with . . . and bring things to a close for this month. ΓΙΙ the E-214 is one of the best. print a letter from ). Gibbon. 2629 W. Soaring...... Continued from page 31 As you can see from the photo of Bob 35 PI., Chicago. IL 60623. ). writes: landing his Windsong, you can achieve "I have been reading your helio (Would have done better if I’d had a some remarkable glide path angles with articles and recently broke down and second one-hour practice session with those flaps and reflexed ailerons! Yes, bought a helio. I purchased a CMP it!) the flaps go down and the ailerons go Cricket. Futaba FB 5LK, and an O S. Max A brief rundown of the Pantera specs up! The amount of drag created by this F-H; much to my wife's dislike. I have would include: span, 100 inches: wing co n fig u ra tio n has to be seen to be experienced several costly crashes while area. 930 sq. in.: stab area is 14% of the believed! If you can aim a glider, you can

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 87 THE REMOTE CONTROL ASSOCIATION OF CENTRAL FLORIDA PRESENTS THE 16th ANNUAL • WARD/NOEL $100 • INTERNATIONAL 4 CYCLE HADDOX • PATTERN MINIATURE SCALE $500 DUCTED FAN AWARD SPORTSMAN AEROBATICS AWARD ADVANCED CLUB EXPERT 1983 MASTERS CHAMPIONSHIPS

• SCALE • RACING AMA SPORT SCALE FORMULA 1 SPORTSMAN 1/4 MIDGET EXPERT GIANT SCALE

• HELICOPTER TANGERINE NOVICE INTERNATIONAL R/C CHAMPIONSHIPS U S . S<-mI« I h s le r s INTERMEDIATE EXPERT SCALE ^’Ί·»μΐαα!&^ 1984 REGIONAL HELD AT: R/C WORLD OF FLORIDA • 450 RUNWAY THE WORLD S FIRST PLANNED COMMUNITY FOR MODELERS • 50 AWARDS ORLANDO. FLORIDA DECEMBER 26,1983 — JANUARY 1,1984

MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY DEC. 26 DEC. 27 DEC. 28 DEC. 29 DEC. 30 DEC. 31 JAN. 1 IMAC PATTERN PATTERN PATTERN 1/4 MIDGET FORMULA 1 SCALE 1983 NATIONALS ALLCLASSES ALL CLASSES ALLCLASSES RACING RACING ALLCLASSES ALL CLASSES 8 A M -5 P M 8 AM - 5 PM 8 AM-NOON 8 A M - NOON 8 AM -NOON 8 A M -5 PM REGISTRATION 8 A M · 11 AM SCALE 1/4 MIDGET FORMULA 1 REGISTRATION RACING RACING AND STATIC NOON- 5 PM NOON-5 PM 8 AM -NOON

SCALE 3RD HELICOPTER ALL CLASSES ANNUAL 8 A M -5 PM NOON-5 PM PATTERN QM S FI •NITE FLY' (OFF-SITE) REGISTRATION REGISTRATION REGISTRATION HELICOPTER ALTAMONTE INN ALTAMONTE INN 6 PM 8 A M - 5 PM *1984 AMA 7:30 PM 7:30 PM ONSITE (OFF-SITE) REQUIRED

SPONSORED BY: · MODEL BUILDER • RC MODELER · CENTRAL FLORIDA HOBBIES • KRAFTSYSTEMS · MINIATURE AIRCRAFT SUPPLY • SIG MANUFACTURING · “ HOT STUFF” ADHESIVES, SATELLITE CITY • K & B MANUFACTURING · MIKE HADDOX • BOB’S HOBBY CENTER · JACK WARD / TED NOEL • SUNSHINE HOBBIES · PLAQUES INTERNATIONAL • MODEL AIRPLANE NEWS · COLONIAL PHOTO AND HOBBY

PRE-REGISTRATION $15.00 · $5 .00 EA. ADDITIONAL EVENT (MUST BE PAID BY DEC. 20) ALL REGISTRATION AND INFORMATION REQUEST TO: LATE REGISTRATION $25.00 · $5.00 EA. ADDITIONAL EVENT TANGERINE FOR INFORMATION ONLY SEND S.A.S.E. 1361 ACRES DR. APOPKA, FL32703

NAME ___ AMA FCC

ADDRESS STATE ZIP

EVENTS FREQUENCY FEE

NOTICE: 72-240 MAY NOT BE USED

88 MODEL BUILDER For information send $3.00 to TECHNOPOWER II Inc. 610 North Street, Chagrin Falls, OH 44022 land a Windsong, because that’s what meant a lot, as Tom and I were con­ the approach looks like. AIMING! The tenders for the top ten .. . and it looked aircraft slows down, points down, and by like I hadn’t knocked him out of the NEW R/C golly, GOES down just as you direct it competition yet! Rats! . . . controllably! Well, I’d better knock myself off this BOOKLET This technique is less forgiving than topic, or I’ll be breaking my own promise Answers the questions the spoiler method, but equally effec­ not to bore you with blow-by-blow most often asked by tive in the hands of a good pilot. The stuff! those who want to spoiler technique says, “ Slow it down by Let me say this in closing, if you don’t get started in R/C flying: PLUS, it in­ killing lift over the wing, and point the fly thermal contests, you are really troduces you to the nose up to keep it in the air.” Recovery missing out on the fun. Don’t go with the best airplane to start from this attitude is instantaneous with “ i’m afraid I’ll embarrass myself ” attitude with, the GOLDEN the retraction of ihe spoilers as the if you are a novice . .. everybody was FALCON! entire wing suddenly gets its efficiency green at some point in time, we under­ To receive your copy back. With the flap method. “ Dump the stand. If you are a “ hot shot” pilot, or SEND $2.00 TO flaps, create more lift and drag, point the you think that’s what you are, you need nose down to prevent a stall, and don’t to compete in a big contest like the FSF ST. CROIX OF PARK FALLS, LTD. retract the flaps unless you want to drop just to see if you rank, never mind where P.0. Box 279P - Park Falls, Wl 54552 out of the sky.” The flaps slow the plane you rank! You’re in for a surprise, down almost too effectively, so that if mister! inch wing area; foam core wings with ply you should raise the flaps for any reason, Q & A FORUM: wing skins and no spars; separate flaps your wing suddenly loses lift ... at slow A PROBLEM WITH FLAPS and ailerons (ailerons double as spoil­ speed . . . precipitating a dramatic in­ AND PITCH CHANGE ers); fiberglass Sagitta 900 fuselage with crease in sink rate. The long and the Over the last couple of months I have an extended, straight hinge rudder; short of it is that you’d better be sure of received a couple of interesting letters symmetrical 9% thick, foam and balsa your commitment to land when you from an R/C sailplane designer and flier stab with 14-1/2% o f the wing’s area. Fly­ deploy those flaps, or you could be in from Walkersville, Maryland. His name ing weight without ballast is about four trouble. Now, good pilots don’t often is jack Cash. (When I first saw "). Cash” pounds, I’ve never bothered to weigh it. err to this degree, so it really isn’t a on the outside of the envelope, I thought "In your column you mentioned that problem at all . .. just an adjustment in we might have a celebrity in our ranks.) you thought that a lot of stab would be technique. he responded to my request for infor­ necessary to stabilize the E-214. You I'll never forget watching Tom Bright- mation regarding the Eppler 214 airfoil were absolutely right, I started out with a bill's second flight of the second day in use on an R/C sailplane. As theoretical stock Sagitta 900 stab and had to fly with where he searched in vain all over the data is nice to argue over, it’s even better the CG near the 25% chord location. sky for a thermal until he was about 150 to have firsthand experience with an air­ With this setup, the ship was stable at feet off the ground and almost ready to foil section so that you can make em pir­ only one flap setting, reflex the flaps and set up for his landing. It was then that the ical comparisons. We don't fly theoreti­ it became almost uncontrollable (defi­ Windsong telegraphed that sometimes cal aircraft.and w edon’t all likethesame nite tendency to tuck from level flight). faint signal, “ Hey, I feel lift!” back to its flight characteristics. As Jack’s letters are With the flaps drooped, the ship was master, and Tom responded. My re­ fairly long, I’mgoingtoquote only some controllable, but a lot of down elevator action to the thermal that he had found of the juicier parts: was required to keep it moving. The was that it was too little, too late. Boy. ". . . I’ve just finished reading your larger stab cured these problems and was I wrong! Tom banked that big bird September column in Model Builder. allowed me to move the CG back to up to about 20 degrees and started and I’d like to submit my observations about the 35% chord location. circling. Slowly .. . painfully slowlv! . .. and impressions o f the E-214. As I “ Also, you mentioned that the flap the Windsong grabbed altitude. I kept mentioned above, I'm in the midst of my hinge line is supposed to be at the 75% thinking, “ It’s not enough,’’ but a own design program which, by coinci­ chord location. The flap hinge on my minute later that big,graceful,scale-like dence, is based on the E-214. A thumb­ ship is at about the 80% chord location Windsong was 50 feet higher, and nail sketch of my current ship is as and the Windsong’s is somewhere another minute into his flight! This follows: 774-inch wingspan; 950square- around the 85% chord location as are the JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 89 speeds as the flap is much more powerful than your elevator. The trick to slowing your plane down at high speed is to use your flaps slowly, as you have already

90 WHEN CONTACTING ADVERTISERS, TELL’EM MODEL BUILDER SENT YOU! MODEL BUILDER A GREAT CHRISTMAS IDEA! A C U T ABOVE Precision cutting instrument out­ lasts the competition by ten to one.

The Uber Skiver was designed to meet the precision require­ ments ol photofabrication, microcircuitry, graphics arts pro­ duction, etc., and as such becomes the perfect cutting tool for the discriminating modeler.

ONE. I OAy

• Long Life Stainless Steel Blades Availiable in seven satin anodized handle colors: silver, blue, red, green, gold, black, and violet • Rear Draw Bar Clutch C om plete set in fitted hardwood case; includesUber Skiver, together with two vials containing • Instrument Quality Materials fo u r No. 11, and one each of Nos. 10, 12, 15, and 2 0 ...... $16.95 • Advance Collet Design See your dealer, or order direct Dealer inquir­ Individual handles (specify color)...... $6 95 • Hex Cross Section ies invited. Orders are shipped First Class mail Vial of 6 blades (No. 10, 11, or 15)...... $3 .00 • Deeply Knurled Grip in the U.S., Canada, and Mexico. Overseas A ir • Blades can be resharpened mail add 25% of total order. Remit by Inter­ (No. 12 or 20)...... $4 .00 national Money Order or U.S. funds. Postage paid for A P O and FPO orders. VISA and MASTERCARD add 5%, and include expir­ MODEL BUILDER PRODUCTS ation date and signature. California residents add 6% sales tax. P.0. Box 10335, Costa Mesa, CA 92627, Dept. A.V. successfully? Well, right now the Ger­ try the HQ, I'd like to know how you mite and the Thermite parts. The net mans have a pretty good answer, after make out! result was the Vivell Twin 60. all, they took first place individual and Well, I'm out of space again for Now operating out of a new location, first place team at this year’s WC meet in another month . . . and I’m only half- 2470 27th Avenue in San Francisco (this York. Yes, I know it takes more than a through with this m onth’s stuff . . . oh was his home), Earl offered these motors good airplane to do well in F3B, but half well, see ya next time. at $45.00 each less coil and condenser. the fliers at York were capable of be­ Bill Forrey, R/C Soaring Editor. Model Here was a fine little twin, built to the coming world champions on the basisof Builder. P.O. Box 10335, Costa Mesa.CA fine precision practices of Jim Brown. piloting skill, so what was the "racer’s 92627. · Although it is hard to say how many edge” ? It could have been the fact that engines were produced, the Vivell Twin they have developed a very good com­ was around for five years, counting the promise system of aerodynamics. Plug Sparks .. Continued from page 37 period of modifications resulting in the Introducing the HQ 2.5/9 (and its Mk II version. counterpart, the HQ 2.5/8). Ralf Decker run across an advertisement of the Vivell Vivell also became interested in the used these airfoils on his un-named F3B 35 stating, "a few engines available." experiments of Emile Vollenwieter to model (see picture) in the following Availability of this engine was about the produce the E-V magneto. Emile was no manner; HQ 2.5/8 (2-1/2% camber. 8% only thing that kept control line flying Johnny-come-lately to the magneto thickness) at the root of the wing, tran­ alive. business having designed the Scintilla sitioning to an HQ 2.5/9 (same camber, Free flight meets were mighty few Magneto for full-sized aircraft. 9% thickness) at the wing tips. He used a and far between as the Civil Air patrol The E-V magneto turned out to be flaperon system with coupled elevator would spot any high thermalling model quite successful, being put primarily on for pitch change compensation. The and promptly turn on the air raid sirens motors in speed cars and boats. Not to flaperon was hinged at the 78% chord thinking it was a Heinkel or something. be outdone. Vivell immediately intro­ position (22% of chord from the trailing During this time, the alliance between duced the final version of the twin edge). With this system, Ralf had a Offenbach Model Distributors and Jim featuring the E-V magneto. Although it model that was well suited for speed Brown broke up. Ever alive to an oppor­ never did really catch on, (cost and with the trailing edge reflexed five tunity, Earl Vivell promptly made a deal maintenance being some of the prob­ degrees, well suited fortherm alduration with Brown (not to be confused with Bill lems), this magneto probably would and distance with the trailing edge at Brown of Brown Jr. engine fame) to have have gained considerable popularity in neutral, and a model that could launch Jim do his machining of engines under old timer ignition powered models. high and land slowly with the trailing his name. The Vivell 49 was the first, Getting down to basics, specifications edge dropped five degrees. closely resembling the Brown Thermite for the Vivell 60 Twin reveal the engine For a good look at its “ theoretical” engine. has .726 in. bore and .687 in. stroke profile polars, see the graphs accompa­ Vivell. who had always been interested giving a displacement of .60 cu. in. Rated nying this column. The drag bucket is in radio control (even to the extent of at 3/8 horsepower, the engine weighed narrow with the HQ 2.5/9, but aspointed building drones for the Army during only a surprising 14 ounces, less than a out last month by Michael Seelig, it’s in WW-II), had Jim make up a twin based Hornet or McCoy engine. the right place! If you should decide to on the Brown layout of the Little Dyna­ First advertised in a "Hobbycrafts” ad. JANUARY 1984 91 "Tom and his father built the Interna­ Schlueter Free tional while I kept track of the proceed­ ings. Finally came the call to see the Flight Models completed model. The McCoy .19 had 3508 Poinsettia Ave been mounted, and the model was Manhattan Beach, Co. 90266 hanging over the edges of the kitchen table. Old dad Brown, a practicing engineer in his own right, was trying to figure out what the phrase, ‘Install your favorite dethermalizer' was supposed to mean. Finally, we concluded it was not necessary for flight, being something the experts used in contests. (Remember we were still laboring in splendid isola­ tion.) "We packed the airplane and gear into the car and took off for the local abandoned airport which was a pretty good free flight site. Boy!! Were we engine to make a set of drawings. In that trusting souls! same line, this writer is looking for “ Imagine if you will, a warm spring engines like the Bon, BRL, C annon, afternoon with a light breeze pushing Pierce, etc., for drawing subjects. The big puffy white cumulus clouds across writer fully realizes that asking for the the sky. The next thing we had to decide use of these rare engines is like asking was how much gas to put in the integral for a thousand dollars, but any help tanks of the McCoy .19. I don’t remem­ would be appreciated. Now that we are ber anyone saying anything about a test getting into the ninety mark of engines glide. We finally decided to top off the drawn, we need subjects that are not the gas tanks with the comment that we ‘‘garden variety” of engines. would hold the model for a minute or so THIRTY YEARS AGO, I WAS... to burn off some gas. With the engine Robert Benjamin, Model Builder’s roaring, a minute was more like ten cover artist, has gotten to be quite an old seconds. timer fan. In his latest letter. Bill writesof "What happened next still leaves me his experience 30 years ago. shaking my head. All we had done was to "My story is about 30 years old as I balance the model. We fired up at full committed the terrible sin of being born power and hand launched the model during the latter years of WW-II. I am level. The model dropped from lack of not old enough to have been in the real flying speed, snipped off a dandelion, a Sacramento hobby shop enjoying old timer era. and then curled up into the nicest exclusive distributorship in that area, in "I got started in 1949 when dad climbing spiral you ever saw. Boy. did it the September 1946 Model Airplane brought home a Strombecker solid scale ever climb! . . . and climb! . . . and News, the first photo showed an en­ kit of a Lockheed P-80. Between dad and climb! Luckily, when we couldn't hear closed timer. According to Don Belote, I, this model was built, and I became the the motor anymore, it finally quit. Nowit noted engine collector in Toledo, the classic case of a kid who thought he was will come down, we told ourselves as we first model featured an open timer the only modeler in town. started what we would come to recog­ assembly. This particular version has "When I was ten (I had discovered nize later as the classic downwind chase. never been seen by this writer. flying models), the family moved to the "Well, the model didn't come down. The manufacture of this engine re­ small town of Essex, Massachusetts. It This virgin airplane with the perfect flects all of Jim Brown’s practices: was during the mid-fifty tim e that I power pattern, hooked a thermal in a cylinder machined from solid bar stock, discovered a fellow believer by the perfect glide circle. The sad ending piston turned from special cast iron name o f Tom Brown who was also came after a chase of a mile or so across stock, piston honed and lapped to each suffering from the ‘only modeler syn­ several pastures. I had lost sight of the individual cylinder, crankshaft ma­ drome. ' model against the base of a huge cloud, chined from solid alloy steel bar stock, "Tom had a Baby Spitfire .045 engine, but Tom apparently saw it as he ran up to hardened and ground to a fine toler­ so I had to get a similar engine, a Space a fence to vault it. What he didn’t see was ance, and finally, the large cooling fins Bug, Ir. I wished fervently they could those little white electrical insulators! machined from aluminum and spun have been Bantams and Ohlssons but The initial shock knocked him back­ onto the cylinder. Other materials these engines were before my time. To wards about six feet. involved were bronze for the main get on with the story, Tom and I got into "The model was gone. Obviously, the bearing and aluminum alloy for the control line flying. After mowing a model in the first test flights wasn’t going connecting rod with bushed bearing considerable amount of grass, Tom very far, so Tom d idn’t put his name on caps. graduated to a McCoy 19 front rotor it. We spent the next several weekend According to the starting directions, while I, not to be upstaged, acquired a scouring the area including some neat the Vivell people still stuck to the old McCoy 35. swamps and patches of poison ivy, but reliable mix of one part of SAE 70 oil to "After terrorizing ourselves with the the model never did turn up. three parts of white gas. A 13-6 propeller new found power and noise of these "Getting over the shock of losing a was recommended. Most interesting engines, we did learn to fly profile model, we put together several 1/2A was the admonition very few modelers control line models. At this point. Tom's free flights that flew pretty good. Al­ pay attention to: “ Keep the gas/oil dad ventured the opinion that we should though we discovered some ‘grown-up' mixture clean. An absolute must for try something more challenging . . . control line flyers, and gained a measure reliability in contest work.” thereby hangs a tale. of sophistication in that phase of model­ In conclusion, this columnist wishes to "The challenge turned out to be free ling, we were still on our own. Not yet acknowledge the generosity of Karl flight in the form of a Berkeley Interna­ having figured out what a dethermalizer Carlson, one of the premier engine tional (remember Woody Blanchard’s was, we put a few more in the woods. collectors, for the use of the Vivell Twin. PAA Load model?) with a monstrous six- "I can recall committing some unpar­ There is nothing like having the original foot wingspan. Hot dog! donable sins after getting my hands on a 92 MODEL BUILDER il Bulle(, Twin Slack Torpedo .29 and a few ★★★★ ★★★★ others, only to let the goodies go when Γ WOLFF-PAK the local guru advised me they wouldn't DESIGNED FOR pull like a new Fox .35. Bet there are other brilliant ones who did the same SPORT & FUN FLY thing! " Not until the last few years did I get back into free flight. The problem now is to catch up on what I missed. The nostalgia of fat, curvey old timers, circling in the afternoon sun, or just hanging in clear doped splendor on my shop wall, has drawn me back to an era I I thought I missed by being born too late. "I lost track of Tom Brown in the early SPECIFICATIONS MM sixties. While I have been active as a Wing Area... . 540 sq. in. modeler almost without pause since those days, I have no idea where he is. Span...... 60" Maybe he will read this. I surely would L e n g th ...... 4 3 " like to hear from him again." W eight...... 3-4 H lbs. I ...... 2 |-·45 cu. in. Deluxe Kit $64.95 THE ORIGINAL STOCKTON OLD TIMER ANNUAL VISA/MASTERCARD 4517 Morning Wind Place It seems just like yesterday, but it was Ft. Wayne, IN 46804 I 23 years ago in 1960 when the first (219) 432-4324 after 6:00 p.r I Radl° ...... 3’4 channel Spinner. Fuel Tank, Fuel Stockton Old Timer Annual was held at FEATURES Line, Pushrods, Control Mather Air Force Base. The dual spon­ • Machined Balsa & Horns, Hinges, Clevises, Carl Goldberg,Plywood it is actually a 1939design Couplers, Hardware. sorship of the meet between the Stock- as identified• Positive Positioning by M ilt himself. CLEVELAND QUALITY PLANS ton GMA and the S.F. Vultures degener­ η Construction Basic Kit $57.95 Not only does it have subtle differ­ B«ii in Ik * B utin ttsl’ Rool colWctor» item» 't in t · ated to a sole club sponsor, the Stockton B »Semi Symmetrical Airfoil Spinner, Hardware. í L 1919 " World * g>eo*»«i »rvo-κο ΐβ variety— 1400 ences, but the designdoesflydifferently. o lanť Not hurriedly, tp a rid y drown flying loy« group. " 1 /3 2 to 1/4 t it * authentic flying model loyoul plan» u n like a Z ipp er with tight spiraling After a period of eight years, the lo t R/C. C /l. f / f . rubber, »talk. To· muteumt and climb, it prefers wide circles. It’s a good »enow», detail modeler» Once bought, you'll never buy another brand Antique Model Plane Society (AMPS) flicloriol cotalog S i 50. Price lit! section alone 60c OuHtde USA leicept looking aircraft we should see more of. took over the running of this meet. In Can ond Me* I by A ir $1.00 extra. None tree Not »old thru dealer» At least the Florida boys headed up by CLEVELAND MODELS. 10307M Detroit Ave . Cleveland. Ohio 44102 *1 the last six or seven years, this original Ron Sharpton think this design flies meet has been held in conjunction with great! 3. Ron Whitman, Playboy ... 10:49 the Fresno GMAC Annual, which in its Reviewing more gas designs, Photo O /T RUBBER 43rd year has become one of the most No. 12 shows Art Watkins with the 1. Joe Norcross, Lanzo ...... 8:04 prestigious free flight meets in the West. extremely popular Mike for 1/2A Tex­ 2. John Pond, Ying ...... 8:00 Having the original old timer meet with aco. However, Art is using the Ray Heit 3. Terry Thorkildsen, Lamb . 7:28 it doesn't hurt the status one bit! design for Class A. Ever since Barnet 30-SECOND ANTIQUE Due credit should be given to Jim Kernoff of Tyro Models kitted this old 1. Dick Lyons, Miss Tiny . . . . 7:38 Perssons and Don Wrench for co-direct­ Consolidated kit, the design has grown 2. Larry Clark, Miss Delaware 6:08 ing this meet. Sitting out in the hot sun to tremendous popularity. 3. Cliff Silva, Gas Bird ...... 4:48 with no shade would tax the patience of The writer had one that was real tough CLASS A most. To top that off, Perssons brought to check out. On the initial launch, the 1. Ron Dombrose, his motorcycle for those (like this writer) Mike model gently hunted under power, Interceptor...... 8:05 who came poorly prepared to chase requiring one washer of downthrust. 2. Larry Clark, Miss Valiant 7:10 their models. Was that cycle ever handy Sure can spend a lot of time adjusting 3. Dick Lyons, Miss T in y ___ 7:02 as the thermals were out in force that Ray Heit designs like the Scram, Ike, etc. CLASS B day and it took some doing to stay up Haw-w! 1. Al Rasmussen, Zipper . . . . 8:48 with the model. We have to acknowledge the contest 2. Ken Kullman, Alert ...... 8:24 The writer took a flock of pictures, manager without whom there wouldn’t 3. Jack Jella, Ranger ...... 7:42 especially of many little-seen designs be much of a contest. . . from an official CLASS C like Art Watkins’ Tsetse Fly, a Ying to run the meet, to any sort of trophies 1. Terry O’Meara. Clipper .. 15:00 rubber model by Pond, the Contest or prizes. These are the guys that make 2. Tom Keppler, Playboy ... 10:38 Directors, etc., only to find he had made the meets attractive. In that line. Photo 3. Larry Clark, Albatross . . . . 8:07 35 exposures on a single frame. Rats! No. 13 depicts Jim Crockett making RUBBER SCALE (Hey Pond, doesn Ί it just make you want some engine adjustments on the diesel 1. Bill McConahie, Douglas 0-38 to scream?! wrf.) powering the Roamer, a Consolidated 2. Jim Murphy, Cougar However, we do have a few photos, so kit. Not many know this design was 3. Jeff Whitman, Lacey all is not lost. Photo No. 10 leads off the originally called the Pursuitaire, kitted TRUE NOSTALGIA Old Timer activity at Fresno with a shot by Model Designs, of Glenn Ridge, New Received several photos from Art of Ron Dombrose with a Sailplane and Jersey. The kit sold for $1.95! (First Suhr before his untimely death and have Interceptor. Actually, Ron comes to a advertised in Model Airplane News, been looking for a slot to use them. meet with at least five to six gassies. That February 1940). Good flying model, but These photos are of Danner Bunch back Sailplane he is holding is about the fifth difficult to build and hold surfaces true. in the early thirties. Sailplane he has built. Although he has After scaring all the contestants to Photo No. 14 is a picture of Danner been around a long time in free flight death by announcing the trophies were Bunch taking of in his S.E. 5. “ Best darn contests, Ron likes Goldberg designs. not available, Jim Perssons was able to airplane I ever flew,’’ was Danner Can’t go wrong on those models! arrange transportation, and the trophies Bunch's comment about the S.E. 5. Larry Clark, past president of the were duly handed out as per the results Actually, Dan came from Indiana in SCIFS, showed up to take a flock of below: prizes this time. As can be seen in Photo response to a call for pilots and planes to No. 11, this Foo-2-U-2 has been around STOCKTON O/T ANNUAL RESULTS be used in the classic movie, “ Wings.” for a few years. Although this M ilton 020 REPLICA Dan stuck around to also participate in Hugelot design closely resembles the 1. Jack Jells, Stratostreak ___ 11:45 other films like the “ Dawn Patrol,” “ Ace early Diamond Zipper developed by 2. Bill Langenberg, Dodger 11:33 of Aces,” "Hells Angels,” etc. However,

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL’EM MODEL BUILDER SENT YOU! 93 3. Jim Caughram, M ik e ...... 52% 4. Paul Forrette, Powerhouse 44% 5. Steve Roselle, Gulliver . . . . 20% Best part of the whole contest is that those who flew received Old Timer collector kits. SAM 49 Hard on the heels of this giveaway contest, came a report from Chuck Thompson, newsletter editor of SAM 49, about Ernie Payne’s Texaco contest, both full-size and 1/2A. Ernie gave cash prizes of $15.00, $10.00, $5.00. and $2.50 for the first four places. With a great day, a good time was had by all including the SAM 41 boys from San Diego who had been invited to participate. Results: TEXACO several events wide open when normally P E A N U T sail M O D E L S K it. $5 95 1. Ernie Payne (SAM 49) they would be dominated by one or two / ZERO MILES M-18 2. Chuck Thompson (SAM 49) ·/ PIETENPOL DRUINE of the club members. This is a great idea! 3. George Wagner (SAM 41) PIPER CUB COUGAR This keeps up the interest all year as no 4. Lee Norcross (SAM 49) ANDRESON GIPSY MOTH one knows just which trophy the leader MUSTANG LACEY M-IO GANAGOBIE 1/2A TEXACO is going to get. 1. Ross Thomas (SAM 49) Rubber Powered SPORT MODELS One of the striking similaritiesof 1/2A B A B Y A C E $6.49 2. Don Hoyle (SAM 41) ONE NITE 28 $6.95 Texaco events as held by SAM 41 and 3. George Wagner (SAM 41) ONE NITE 16 $5.95 1836 is the terrific flying ability of these 4. Art Way (SAM 41) PRAIRIE BIRD ♦ STHINGLESS $4.95 small aircraft. The biggest problem KIT $5.95 PECK R.O.G. $1.95 facing the modeler is letting the model SAM ABROAD ENGLAND BLIMPS CONTROLLED get too far downwind. These models do Sid Sutherland, 52 Broadwalk, South 11 and 13 FOOT LONG. KITS OR not penetrate too well, hence many READY TO FLY. N O W IN THREE W oodford, London 18, England, reports COLORS GRAY. ORANGE and models are being lost, radio or no radio! YELLOW. LO W PRICES. Word to the wise, men, keep 'em SAM 35 has practically engulfed the NEW! CATALOG No. 25 - $ 1 .5 0 upw ind! nation as O/T activity can be seen SAM 21 everywhere. Peck-Polymers Photo No. 16, sent by Sutherland, BOX 2498 MB LA MESA, CA 92041 . Pond Contest: Did you ever hear such a nutty name for a contest? Well, it’s shows how one should really to to an after a time, the rash of World War I true. When SAM 21 held its annual Old Timer contest! Pictured is sid hold­ airplane movies fell off to a trickle, and picnic, a casual contest was proposed by ing a Megow Soaring Eagle powered by pilots like Bunch had to look elsewhere John Pond, offering his fleet of R/C O/T a Super Cyclone engine originally for employment. models to all of the members. Wow! owned by Freddie Kiel (Kielkraft fame). About this time, Dan started up a Wild idea! Naturally, the model is covered with silk hobby shop and tentatively made a few Those members interested in flying and painted with Hobby Poxy. But the kits for the local modelers. These proved selected their model from a number piece de resistance is that fabulous old to besuccessful.soa full line of competi­ drawn from a hat. The number one man, car in the background! tion model kits were launched. Photo of course, had the first pick of the list of The reader will note the SAM 35 No. 15 was taken in the 1934era, and in it Pond models numbering some 24. There license number on the model. This Bunch proudly holds his latest creation, were no strings attached to this deal, just makes for a six number license, but it Stratosphere. This was a good looking bring yourself, and the propellers, fuel, does advertise the organization. The design that flew well, but was com pli­ etc., were provided. photo was taken at the North World cated to build by the standards of that Came the day of the picnic and only Aerodrome in Essex, site of the “ Battle of day. For that reason the kit never did sell five of the group decided to fly the Britain” film. well. After a few more dips into the kit models on hand. Most of the fellows fell To top the fun off, the 1933 Hudson business, Dan became committed to the a little reticient about flying someone Terraplane is actually large enough to manufacture of model engines . . . but else’s models with the possibility of accept seven-foot wings inside. What a that is another story! crashing . . . this despite the assurances way to go! SAM CHATTER no liability would be incurred for dam­ THE WRAPUP SAM 41 ages (fancy language for if you break it. Received a letter from Phil Barber, of In reading the San Diego Aeroneers we don't care). 1855 Lilac Drive, White Rock, British newsletter so ably edited by George Actually, all types of models were Columbia, wherein he prepaid a SAM Wagner, this columnist notes a con­ flown together with times as per their membership for a junior in his area. Phil siderable amount of O/T R/C action respective classes. To fly them equitably, has the right idea. If we don’t start every month. Worth noting is the scores were percentages based on the getting the younger fellows into this Old amount of interest the 1/2A Texaco actual time over the maximum time that Timer game, pretty soon we are going to event has generated. At the rate of this could be accrued. The only problem was run out of members. event is expanding, this event may the Texaco event, and this was resolved As Phil puts it, "O ne aspect, (or old evolve just as one model event. This has by putting a 30-minute limit on the buggers like you and I who built before happened to the San Antonio SAM 1836 flight. To give you an example: when World War II. is to be enthralled with Chapter wherein they not only specialize Dave Bruner did a 20-minute flight, he Old Timers. But what pleases me is to see in the 1/2A Texaco contests, but have a actually received a score of 20 over 30 or youngsters becoming interested. Unless newsletter devoted strictly to that form 67%. The winner, Ted Kafer, flew a hot they do. the vintage brand of the hobby of flying. Limited Engine Run model, a Cleveland will die when we die. One of the most important gimmicks Cloudster scaled to Playboy size, for "I treasure the remark of one boy to spur interest in the competition for three flights earning him a percentage of (upon seeing Phil’s Old Timer) who said. the annual High Point Trophies is the 74. Results looked like this: Ί like the wheels and windows.' Another ruling that a club member can win only 1. Ted Kafer, C lo u d ste r...... 74% youngster said that he liked the way they one of the many awards. This leaves 2. Dave Bruner, Clipper ...... 67% climbed as if they had all day."

94 JANUARY 1984 Think about it fellows. When was the last time you got someone interested in Old Timers? Why not share the fun of BUZZ WALTZ the best phase of modeling with some­ "f l e x - o f f " one else! It certainly can be rewarding! · FLEXIBLE METAL EXHAUST TUBING R/C DESIGNS

m LIGH T WEIGHT GALVAN IZEO STEEL 255 N. EL CIELO, SUITE 476 R/C Autos.. Continued from page 47 • e a s i l y r ø r r , w il l hold it ··* ska« PALM SPRINGS, CA 92262 • FUEL PROOF-NOT EFFECTED IT HOT EXHAUST OR HOT FUELS running that sharp blade along it. With ■ WORM DRIVE CLAMP INCLUDEO B E G IN -A IR TRAINER 54 In. span, 540 in2 areaj very little practice you will be able to cut • WEIGHS ONLY SLIGHTLY MORE THAN RUBIER OR PLASTIC TUSING 3-4 ch. R/C through the overlap of the 3M down to, but not through, the KHP tape. If you look really closely at the second picture, -SIZES TO FIT HOST HUFFLERS- No. I06F0 1/2" 41·.X 12·' 5.7S you can see where we have already ac­ No. I07F0 5/8" 41«.X 12" 6.00 No. IOÄFO 3 / V 1 d l «. a 12" 6 .2 5 complished this on the side and rear No. I09F0 7/8" 41a.X 12" 6.50 windows with the windshield area still needing some trimming. TATONE PRODUCTS CORP. $39.95 This same technique is also shown in 1209 Genewa Ave.San Francisco. Ca.94112 415-334-7189 the third picture, in this case we ran the KHP tape as a separation line between and if the color coats were applied thinly BEGIN-AIR 40 TRAINER the two colors. When it was placed enough, the white will back them up 72 In. span, 760 m2 area where we wanted it, the 3M tape was nicely giving bright colors. 4 ch. R/C applied and the excess was trimmed off With that we arrive at Picture Number using the KHP tape as a guide. We apply 4 . . . and a reminder of the limits tape this way whether or not we intend imposed by black and white photo­ to paint a separation line. graphy. I know the body doesn’t look With the body in theconditionshown like much in the pictures, but thankfully in picture three, all is ready for paint. As it looked pretty good on the track. The center section of the body is a bright red. mentioned. I rarely use spray equipment $44.95 anymore, instead I use the Tempo brand quarter panels and back end are a of autom otive touch-up paint. Even medium blue. By the time we got done though its use does limit one to basic applying stickies and numbers, we had a paint jobs (fogging, paneling, cobweb­ body that hadn’t taken much time to do, $25.95 bing. and many other tricks are difficult, was easily seen on the track, looked several impossible, with spray cans), it is kinda like a race car, and was relatively V very convenient to use: shake the can, bullet-proof. X spray it on, and you’re done. Bullet-proof? Not quite, but you Your dealer has ready access to this might notice all the different stickies. line of paint as Delta distributes the several of which are actually used to VELERO beef up the body. While not shown 76 in. span, primary colors such as red. white,yellow, 6 3 5 In 2 area etc. Or you may quite possibly locate it clearly, there is a large Associated 2 ch. R/C at an auto parts store: ask for the Tempo stickieon the air dam. In an accident, we brand, all the stuff I use is made from all know this part of the body gets hit DuPont Lucite lacquer, according to the first, but the stickie does a nice job of CAZADOR 100 In. span, 1047 In2 area info on the cans. (I mention this as it is reinforcement here, as does the Delta 2-3 ch. R/C possible that Tempo also packages an stickie in the "g rille ” area. While the enamel-based paint. And don't use the front fenders on this body are fairly black . . . for some reason that color strong, this is not the case with all w doesn’t stick very well.) bodies, so we are in the habit of applying Anyway. I use a heat gun to lightly a stickie where the MRP number is on warm up the spray can, which seems to the example. make all spray cans work better. A light Not shown at all are thestickieson the S39.95 fog coat is first, followed by a lew passes inside of the body, in this case in the ot the heat gun to speed the drying of nose of the body. Remember that quality DIRECT SALES ONLY the paint. Another fog coat, more heat stickies are made from mylar, which is in from the gun. The third coal is often a itself a tough material. Laminate mylar 619-325-5494 little heavier, but you only want to get inside and out on a body shell and it gets coverage. Do not keep painting until a lot stronger with very little weight you can’t see through the paint with the penalty. And you know how the collars holes leaving the excess window ma teriaI body held up to a light. Instead, place on body posts wear through that new to act as a guide, directing the cool air the body on a white surface and check paint job, don’t you? Right, morestickes straight to the fins on the motor. The coverage. You will be surprised to see on the inside of the shell will eliminate picture explains it all much better: just that very light coats of paint will yield that problem. be sure to cut the whole window out in adequate coverage. Picture Number 5 shows a little trick I order to get as much scoop material as With the first color applied, removeall discovered completely by accident. In possible. tape for the second color. Leave the the past we have always bent the rear Finally, we come to Picture Number 6 window masks in place. In the case of portion of the side windows out a little of the completed body. And to head off the example, we also left the background to act as a scoop for cooling air. Many any more letters asking if we really race masks in place, as well as the 1/8-inch times the scoop would crack away at the our cars with the bodies mounted as low KHP tape separating the two colors. bend line. For this body, I decided to as shown in most pictures in this column, Check to be sure these masks are still drill small holes at theendsofthecutsto the answer is "almost. ” While it might be down tight and paint the second color. eliminate this problem. However, upon considered a waste of time by some, I Now the background masks can come folding the window back, I noticed that much prefer to have the bodies just as off. and the whole interior of the body the section of the window which would low as possible. With the suspension cars can be shot in white. The white is normally get cut off could be folded and their continual chassis motions this required for the backgrounds, of course. back on itself and locked into the drilled can be a little problem, but then if we

JANUARY 1984 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 95 COMPUTERIZED AIRFOIL PLOTTER Recently. I received a lettertrom Tony YES-SIR, YES-SIR, THREE BAGS FULL Brooks. 24 Marl Rd.. Radcliffe-on-Trent. Nottingham, England, NG12 2GY. Tony 4 - ™ A VAIL- Å R LE b f o y u says, "O ne very useful aid to dealing with aerofoils is a home computer. Placet Software (read: Tony Brooks) offers a suitable application written for the Sinclair ZX Spectrum (in the US. the equivalent is the Timex TS2000). The price is 4.95 pounds Sterling for the 76K WALT ROONEY NOW OFFERS 4>BAGS OF PEANUT SCALE PLANS version, and 5.95 pounds Sterling for the ALL WELL TESTED DESIGNS, AT ONLY tS.OO EACH 48K version. Postage is another .50 for surface or 2.00 for air." EACH BAG FEATURES FOURTEEN PEANUT PLANS, The program is cassette based and ONE OTHER, PLUS PHOTOS AND INFORMATION does the following: SENO tl.0 0 FOR COMPLETE LISTING ANO SAMPLE PLAN TO: 1. Displays a picture of the airfoil. 2. Displays the coordinates. WALT MOONEY, 2912 CABRILLO MESA OR 3. Displays rib dimensions for a given SAN OIEGO, CALIFORNIA 92123 chord, or for a tapered wing. 4. Displays the reference sources. hear ihe body hitting a lot, it will get using a stop plunger spring with less 5. Airfoils may be added or deleted or trimmed slightly. In actual practice, we strength. a new file created. rarely trim a body at the track; about the In extreme cases, however, the model 6. Displays are copiable to a ZX time we finally decide to do some may shake something loose under the printer. whittling, the pavement has done it for shock. One such event occurred at the The file contains approximately 100 us! Harts Lake semis. A Montreal stop airfoils. The difference between the 16K Dan Rutherford, activated and the shock caused the stab and 48K is in the speed of display and the 4705 237th PI. S.E., to override its stop, causing a leading size of the file. Bothell, WA 98021 · *12345 edge setting about 1/4 inch higher than The Placet Aerofoil Directory is avail­ able now. Contact Tony Brooks. expected . . . the result was a steep glide to the ground. CARL GOLDBERG RESPONDS THE G-6 AIRFOIL o ftlE MORE TIME Free F lig h t. . Continued from page 58 All-in-all. I found Tom’s stop to bean excellent device . . . easy to make and Recently, some discussion has oc­ wind your model and, by pushing the install. Ted hasfound itto bean effective curred in the pages of this column about plunger into the face plate hole and and time saving system for his Wake­ the Goldberg G-5 and G-6 airfoils. Just allowing the fully wound motor to put fields. I recommend it. four weeks ago, I received a letter from pressure on the plunger, the prop Carl Goldberg himself. He says, in part, assembly is kept from rotating. In order JANUARY MYSTERY MODEL "/ noticed in your column in the )uly to release this plunger, the prop is This is, I think, the model which issue an item about my C5 and C6 rotated back slightly allowing the caught the attention of FAI power fliers airfoils, and a drawing which is labeled plunger to release out of the way. Now around the world. It was the first ship G-5 .. . the magazine drawing looks the model is ready to launch whenever that used both VIT and autorudder in distinctively heavy in the upper leading you want and regardless of how long FAI competition, and it won the interna­ edge right near the nose. I don't have you’ve had to wait. tional event doing so. Since then, few the coordinates; I'm not sure I ever did. Some added notes about this system serious power fliers have used anything By the way. the airfoil was published as sketched: else. As with any new development, tw ice in one of the English model 1. The hub, the thrust bearing, the contemporary gadgetry is less compli­ magazines, and was wrong both times. shaft bushing, and the 2mm wire prop cated than the original. So it is with VIT "As to the Sailplane airfoil, you are shaft can be purchased from F.A.I. and autorudder. This World Champs (piite right, it was the C6. This essentially Model Supply, along with the rubber winner, however, set the stage for the is much like the C5. except for the strip needed to fly these models. Their present development. In that sense, it underside as it began to approach the address is P.O. Box 3957, Torrance, CA was the pioneer for all of us. trailing edge. I was trying to make a 90510. If you can name it, and if you are the structure that was stronger at the rear, 2. All of the other components can be first one in line with the correct name. and in which the trailing edge would be purchased at a local hobby shop, except Bill Northrop w ill send you a nice prize flat on the work surface." for the winding hook which may be . . . like a free subscription to your Thanks, Carl. I’m sure only purists purchased from Jim Crocket Replicas, favorite magazine. Please send your would quibble over such items at the P.O. Box 12600, Fresno, CA 93778. (The name and address along with your best d iffe re n ce betw een the G5 and G6 winding hook is not shown). guess direct to Bill at Model Builder airfoils, but it’s nice to have the designer 3. The aluminum prop hub will have Magazine. speak up with a final word. to be drilled to take the hold plunger. DARNED GOOD AIRFOIL: RSG 31 NFFS SYMPOSIUM FOR 1984 4. The hole in the face plate should be The RhodeSt. Genese 31 isthethickest A call for papers and nominations. It’s drilled oversize. I use a 5/32 hole, and it of the RSG series. It is still a very good now time to get ready to submit your should be drilled into the nose block to a free flight airfoil. In fact, a closer look papers and nominations to the National total depth of about 1/4 inch. More is will reveal that is nearly identical to the Free Flight Society for the 1984 Sympos­ acceptable, less is not. section used by Sal Taibi on his highly ium . This prestigious docum ent has 5. The plungers (both of them) should successful Starduster series of free flights carried valuable developments, state of extend well into the hole so that the stop (except for the 350 version). The RSG 31 theart articles, the Top Ten models, and is positive. has enough thickness to use nearly any the Free Flight Hall of Fame over the The system is ideal for models that spar structure arrangement. The forward years. Since its first issue in 1968, the have a rubber weight restriction . . .such high point indicates that it will be non- p u b lica tio n has contin ue d to grow. as Wakefield and Coupe. The only critical in adjustment. This could be an Now, this is your chance to become a drawback that I’ve noted is that occa­ excellent section for newcomers to free part of its growth. sionally, the stop plunger engages flight design, and it is certainly thick Send your nominations for the Ten abruptly, which has a tendency to shock enough to be an excellent sport model Models of the Year 1983 to: James G. the airplane. This can be adjusted by section to be used for beginners. Wilson ,1030 Avenue D, Redondo Beach.

96 MODEL BUILDER CA 90277. Send your nominations for the Free Flight Hall of Fame to: Anthony J. Italiano. 1655 Revere Dr.. Brookfield. VVI 0^ JOHN POND ^0 53005. Send a brief outline of any proposed papers to: Stan Stoy. 12314 Inletridge Old Time Plan Service Dr.. Maryland. MO 63043. or call: (314) The largest selection of plans in the world at the most 434-9153 (hom e), or (314) 233-8361 reasonable prices. Each list $1.00 (office). All 4 for $3.00 The nominations or outlines should be sent by January 1, 1984 in order to No. 14 OLD TIMER F/F GAS receive proper consideration. No. 14 OLD TIMER RUBBER/TOW LINE Don't put it off, do it now. No. 14 OLD TIMER FLYING SCALE A through K A THOUGHT IN CLOSING Now that winter is upon us.it'stimeto No. 14 OLD TIMER FLYING SCALE L through Z think about the winter free flight build­ New plans prices effective Dec. I983 to Dec. 1984 ing schedule. Order some plans, check P. O. Box 3215 out the balsa supply, the engines, the San Jose, Calif. 95156 other stuff. You can do it while the football game is on T.V... .just move the Phone (408) 292-3382 set into the shop. Then you can watch football while looking over your build­ 5 has been installed. Check to see that Use 1/16th aluminum tubing for the ing materials. Or you can just watch the fuselage is a symmetrical structure. Peg- football . . . Oh, well, there’s always Add the remaining stringers. The model should balance at the wing tomorrow! · Now, remove the top center stringer tips halfway between the two wing spars. between Formers 7 and 8. Prepare the If it does not, ballast it with modeling diagonal members that make up the clay or something similar until it does. Dear Jake...... Continued from page 6 bottom of the windows, and cement Washout each wing tip about an eighth them in place after removing part of the of an inch. Wind up your Dart and see Dear lake: two sidemost stringers between 7 and 8. how it flys starting with a few turns in the What's the origin of the word 'servo7 Carve the tailcone to its final contours. rubber motor and working up to maxi­ —Semanticist in Seville Cement the four pieces that make up mum winds over a period of eight or ten Dear Semanticist: the front of the nose cowl into a single test flights. The model in the photo flew I believe the term was first used in an piece. Cross the grain of the adjacent in lefthand circles with a fairly steep Italian tennis match. layers for increased strength. Now, using bank angle. Interestingly.theturnswere —Jake some fairly stiff bond paper, make up a wider under high power than later on in ★ ★ ★ pattern by the cut-and-try method for the flight when the prop had run down. Dear lake: the balsa sheet wrapper that goes be­ Undoubtedly, this is the result of some I know your true identity, hut for ten tween the back piece of Former 3 and slight right thrust, although none was g's I’ll keep it quiet. Former 4. When you are satisfied with intentionally installed. —A Friend the pattern, select a piece of A grain, Viva Mordecai Murphy, and down Dear Friend: flexible 1/16 balsa sheet, and make it to with Bill Barnes . . . although it would It’s a deal. Here they are: ggggg- match the pattern with its grain aligned sure be nice to live through those ggggg- with the length of the model. Wrap it interesting days again! · —Jake around Formers 3 and 4 and cement it in ★ ★ ★ place. Carve and sand this engine cowl assembly to the contours shown in the BIG Birds . .. Continued from page 43 D art...... Continued from page 51 top and side views, and then cement it in place on the front of the fuselage. relatively high speed necessary for each stringer. Cover the various assemblies with almost level flight. Rather than attempt a Cut out all the formers, notching as black tissue using your standard cover­ high speed wheel landing that would indicated. Note that the notches are ing procedures. Water shrink the tissue probably put my Pup back into many only half thethicknessof Former 5. Mark and then give the model several coats of pieces. I decided to cushion it in some the top of each former. The top is the clear dope. Add the details such as the high grass near the runway as only minor leftmost point on the former as it is periscope, the engine air scoop, the cowl, gear, and fuselage damage was drawn on the plan. exhaust stacks, the windows, the w in­ sustained . . . all because of the servo Select a light weight balsa block to dow frame outlines, and the Dart logo. arm screw loosening and falling out. make into the tailcone (TC). Cut it to Bond paper fillets are fitted using the “Although I've read and heard of match the top and side view, but do not cut-and-try method and painted flat servo arms being installed without the carve it to its final contours. Mark out black. Cowl flaps are scribed in. screw, and then coming loose. I have the location of the ten stringers that are Carve the propeller spinner out of a never read anything about them vibrat­ to be notched into the front face of the piece of fine-grained hard balsa. Insert a ing out once installed properly. Other TC. Sharpen a piece of hard balsa or prop shaft wire, use your favorite free­ than Locktiting them in (which I would dowel and push a dent into the TC at wheeler if desired. not think is advisable), would rubber each location to accept a stringer. Get two Sleek Streek propellers (or cement applied to the threads while Now, placing all the former locating equivalent) and take three blades and screwing them in work to prevent marks to the inside, and using cyano­ notch them into the spinner. Make the loosening? Guess it would be something acrylate (Hot Stuff, Zap, etc.) adhere the thrust bearing out of hard balsa with a like elastic stopnuls. I wonder if others ten stringers in place in the TC. Make hardwood front face. Drill a 1 /161h have had similar experiences, and if so. sure that they angle outward as they diameter hole in it and insert a short what corrective actions did they take?” extend forward so that they make the length of aluminum tubing. Add a It’s been quite a while since I’ve proper tailcone angle. Now place couple of washers to your prop shaft and heard any complaints about servo arm Former 9 inside the stringer cone at its insert it into the thrust bearing, then retaining screws backing out, regardless location marks the cement it in place. bend the motor hook. Add a filler piece of the make of the servo. Although Dick Do the same thing with each of the other to each side of the fuselage just forward doesn’t seem to think too well of using stringers working forward until Former of the tail to support the rear motor peg. Locktite, the “ Blue” medium strength

JANUARY 1984 WHEN CONTACTING ADVERTISERS. TEEL ’EM MODEL BUILDER SENT YOU! 97 98 I FULL-SIZE PLANS SERVICE I cement into service may have merit. merit. have may service into cement rubber silicone that know Ido servo. the stuff, on the other hand, is a no-no no-no a is a screw retaining hand, arm other the on stuff, a either yet causing well, without undone extremely be can hold they choices; to use something to keep those screws in those keep to use to something rubber pressing about idea Dick’s and ’cause this one will make your little servo little ed" your "R make will ’cause The one this temper. nasty a or hernia be excellent would Zap-Lock or Locktite cause. In other words, for some reason, reason, some for words, other In cause. results, good with often used been has evs Te biu qeto i . . . . is question your on obvious gnaw The to servos. through getting and are vibes present of amount an abnormal the not and effect, the treating is has place who anyone that feel I . . owever. H engine not being mounted as securely assecurely mounted being not engine overbalanced flywheel. Then again, you you again, Then flywheel. overbalanced if perhaps, Or be. should as it solidly or WHY? get down to real basics. . . you may havemay you . . basics. real to down get or hard too servos not mounting let’s that And forget down. isbreaking coil the ill w prop that way, be Either to tips prop tracked. your for way no there's to refuse totally may you or important, iuto immediately. situation but time, some take gonna It’s in­ the amplifier. nor strength the have doesn’t let’s Or alsoculprit. be the might soft too vibration. of you’re that be lot could possibility helluva Another one induce that means which .. . hub is 6-bolt props ause balancing that think not may you’ve got to isolate and identify the the identify an and isolate like to got acting you’ve from keep to grity te that or . . . replacing or cleaning of need dire isin plug the that gas,or stale using Dario's needs it Quadra, a using you’re could also be at fa u lt. . . like slop, large large slop, like . . lt. u fa at be also could problem area(s). . . and then rectify the the rectify then .and . area(s). problem that airframe an to engine that married odN os ec nt unn straight running not etc. Rods, Gold’N hingeline gaps, or control-rods, cables, cables, control-rods, or gaps, hingeline ------Magazine include a reprint of the construction article, if if article. the article, of construction part the were of instructions reprint building a include Magazine 141 URS 24 $9.00 2540 1 184 SUNRISE o N o 03 RS.MSIE OA $6.00 AT BO MISSILE RUSS. 10831 00 No $2 ING W G IN FLY ARUP 1183-0.T. No. No 10832 C1TABRIA $5 00 $5 C1TABRIA 10832 No o 14 H·YGS $5.00 GOSH Y OHM· 1842 No. o 030T.WDY $5.00 WEDGY . 0.T 1083 No $4.50 A $12.50 FLE G IN FLY 11832 No FURY KER HAW 11831 No No. 184 O.T. 1/2A B R lG lD lE R $5.00 $5.00 R lE lD lG R B 1/2A O.T. 184 No. Could be that it’s simply a case your simply of it’s that be Could A lousy servo control system hookup hookup system control servo lousy A l ul ie ln ucae fo MOOEL BUI R E D IL U B L E O O M from purchased plans Size Full ll A ED O MDL ULE PAS SERVICE PLANS BUILDER MODEL TO: SEND BOX 10335. COSTA MESA. C A L IF O R N IA 92627-0132 IA N R O IF L A C MESA. COSTA 10335. BOX S porty 05 electric Pylon racer. Wing me? me? Wing racer. Pylon electric 05 porty S lor trainer /C R wing. w lo ild-nunneted. M t 30t n. pn 8i. aeKeuy i. yn u e K Dave in. 38 «pan. . in tq 300 it scaled to 82% lo r R/C. By Jim Reynolds. Jim By R/C. r lo 82% to scaled An 1 /2 A T e * version ol the BeiKcley k it it k BeiKcley the ol version * e T A /2 1 An Classic British uplane in 1/4 scale, for for scale, 1/4 in uplane British Classic 25 10 .40 glow engines By By engines glow .40 10 25 uda * qi. oe. o Prentice. Don power. equiv. o* Quadra aswnti 4.Wdesae . * u f Wedge-shape '40. in wmnet Nats " A " utciano M alt W y 8 3-ch. or 2 clast. A S 0 'Pou 14 HM original of model scale R/C builds easily. 4 2 in. span. Leon Shulman. Leon span. in. 2 4 easily. builds ilson. W Stan By R/C. 4- pikot. A .29 Dam to By .20 r radio. lo 3-ch. and engines pushei/conerd R/C sport A ------part of of part AN.FrBonJ.egn.49" span. " 9 4 engine. '37 Jr. Brown August For m . fro .A.N M design Penides/AbJug -hn /,7-n jn yBilYoung Y ill B By power, »jan. elec, 75-in. 5 0 R/C, in Tw 4-chan. vang. g flyin Scale the beginning when C/L design had yet yet had design C/L when beginning in wasback the this Remember, all. them of MONTH THE OF TIP ice ... i te huh ws o of not was thought the if . . . circles sophistication and gear high into get to building start . . you . once . . . holidays forget happy don’t and safe everyone »95, A98387.Here’swishing Spanaway, W ell!” w doing research a If “ . . . there out types scale think that even today this design would would design this today even that might You think established. been yet hadn’t everyone let can we so pix some take presents, Chanukah and Christmas those surprising A arms. servo the to true and not seem out of place at the control line line control the at place of out seem not doing. you’re what know worth not it’s doing, worth is not project It’s easy servo. that to run straight had afairly controls their that fact arms the and those shaft, output the on fit kept tight usually wasthe probably on What flight. did in and back screws retaining those get to even with the servo arm screw in place. in screw arm servo nobody the and with even .. . shaft the off arm push or the pull to want gonna it’s angle, an atin comes rod control if your see to that haveforgotten pilots BIGBird of number can’t hurt . . . but if you experience this this experience you if .but . . hurt can’t bad a is threads screw retaining the on pewgn. .. Speedwagon needs that kind of pressure on a servo, aservo, on pressure of kind that needs idea . . . a little insurance or back-up back-up or insurance little a . . . Blue” “ idea Locktite or rubber silicone like screw-loosening-up-and - backing-out - backing-out screw-loosening-up-and SP Ohrie yu BG ide is Birdie BIG your reason the Otherwise, find ASAP! to got you've problem, gonna go “ bye-bye” before you know it. know you before bye-bye” “ go gonna esf! u asot ship! smooth a Run safe! Be or U.S. funds on Overseas orders. Postage paid for for paid Postage orders. Overseas on funds U.S. or Include card number, expiration date, and signature. signature. and date, accepted. A IS V expiration or Card number, Master Order card orders. O Money Include FP and International O P A by 50% add Remit Mexico), order. and total Canada of (includes Airmail seas is Cas n .. ad 5 o ttl re. o Over­ For or order. ail total Airm of For 25% add mail. Class U.S., 4th in Class or First 3rd includes Price Add 5 % to credit card orders. orders. card credit to % 5 Add This is for all you dyed-in-the-wool dyed-in-the-wool you all for is This LIG AEY S O CIET · ACCIDENT! SAFETY FLYING NO IS Box Street, East 168th 605 Alman, Al I’m not saying that using something something using that saying not I’m not FORNI EIET A X SLS X A T SALES 6X O AD RESIDENTS IA N R O IF L A C E REIG INSTRUCTIONS NEWORDERING have their servo arms pop off in in off pop arms servo their have T. HI 053 $4.00 3 5 P0 SHRIM . .T 0 3 8 5 α Ν o 82 E LTNMK I $1.50 II K M 00 PLETON $9 TEM 4832 No. SPORT IN L K N A R F 4831 No. 81 LCRCS $5.75 ELECTRtCUS 3831 α Ν $3.50 CARGO A C N LLA E B 483-O.T. No. 81 LAE $4.00 PLEASER 5831 α Ν 82 / OE CIPR 0 0 5 $ CLIPPER COMET R/C 5832 α Ν $6.95 HAYSEED C CLASS T. 0 3 8 6 No. alln, o 0 moos B Lry Jolly. Larry By otors. m 05 for sailplane, rist ilch G ill B radio. 3-channel r fo plane g u tu A Malcolm . .A.N M 1937 gasmodel Nov. caoin span " /7 from -1 44 le Im Sharp Electric powered two-m eter com petition petition com eter two-m powered Electric ia n a M James t. th 4 x uild 1/4 B racer. one sport from ukie o tw 1/2A Inexpensive i­ b classic scale 2-inch powered. Electric 3 M. N. 32" pn By oeh Kovel. Joseph y B span. " 2 3 .. .N .A M *37 Continued from page 63 page from Continued ne te, n nw B Cr Hermes. Carl By now. and Contest then, ship. Cabin C inner Cl. w ί-perlormence Η Rubber scale cabin A irc ru ite r from July July from r ite ru irc A cabin scale Rubber or 5 lcrc oe. y tn ilton. W Stan By power. aircraft R/C electric sport 05 tpan r 46” fo simple, Very 054" f 0 1 /. r Richmond. Sru R/C. .15 · .09 r scaled fo r e p ", lo 4 C 5 (0 powered rubber Goldberg*s M inim um o*d·*. $5.00 $5.00 o*d·*. um inim M nte sed record! speed another designer took the rules and applied applied and rules the took designer engine, but trying a single plug head head plug single a trying but engine, that after four years, our engines were were engines our years, four after as that job, the You can believe for times. normal in engine can you right pick as and the just catalog” ” out ne "the o in look not good could “ a was It occasions.” painstak­ been had that one available, best the in rules the meet to it dynamics use aero­ to challenge, mouse new “ procedure this NATURAL awas better with a Thus, creating trap.” of in limits hope their to the principles aerodynamic an flight Free by designed flighter.” was free it “ that established fact the ‘tw in c o il’ ?” You must realize that that realize must You ?” il’ o c the of in plugs weight ‘tw the dual with up the put Why against was, “ scuttlebutt The sides around the bearers. Topping the the Topping bearers. 2 the x 1/8 around bending sides then bearers, X 1/2 3/8 pretty worn. pretty just You times. those in went engines special “ used for only and for cared ingly A time. that by science a become had sent little problem today, it could be be could it today, problem little sent and they were considered radical, the the radical, considered were they and the which semi-symmetrical new­ “ a was fangled” airfoil The was inches. wing square The rules. the to designing would What hour. per the miles more few Such a not. or was progress that whether the wonder have to a break you did we but and model, barrier, 100 mph engine wing” racing "clipped Hornet Later a engines. gas with these on with problem rpm. in difference no showed running on fine later a was It and running powerful. better more that right, hope the in were ads the plugs” dual it “ with the put get were to more afew Cyke,” “ this the “ Cyke” to a couple of standard standard of couple a to Cyke” “ the osbe manner. possible actuator to be had was an Austin free free Austin an was timer. only had the flight be and to came clock, spring alarm actuator the old an metal, can” from tin “ from only not would probably it operated, pre­ would mechanism hap­ gear” the whatever example: For "retract useable. from be to up pened conjured be use, to desired you days, whatever those in. t a t b svrl oe years more several be to was It had have signs. would foils trustworthy” norm, "old the were types Y Clark bottom 200 um inim m the to tapered nicely wasa always weight ignition and battery resulting box off with block fairings fairings block with off box resulting erc bt ol etn as. o so Not also. fabricated were linkages extend The then. servo back would but etal; m retract good of out achined m to had and available not were Materials eto ad aae t l inverted. fly to managed and section de­ flight free the from undercamber Flat drag. less have would said books questions! those Always Hornet? ae h rl pltbe Te eut did result The palatable. rule the made bolting by met be could cross-section b e fo re anyone used a sym m e trica l l trica e m sym a used anyone re fo e b you had to first inve nt, then b u ild . . ild u b then nt, inve first to had you The engine used was all that was was that all was used engine The The difference probably came from from came probably difference The The model itself was an exercise in in exercise an was itself model The for down laid were bucks the When Complexity was always a problem in in problem a always was Complexity It was found that the required fuselage fuselage required the that It was found Speedwagon have done with the the with done have “ INDEX TO ADVERTISERS " Ace R/C, Inc...... 94 Robbe Modelsport...... 1 Adventure Model Craft ...... 92 K&B Manufacturing ...... 80 Satellite C ity ...... Cover 3 Aeronautics. Inc...... 79 K&S Engineering...... 81 Schlueter Free Flight...... 92 American Junior Heritage...... 86 Leisure Electronics...... 77 Sig Manufacturing Co.. Inc...... 4, 5 Associated Electrics...... 67 Lutmi Enterprises ...... 90 Francis Smith's Ship Yard ...... 70 Astro Flight...... 69 Micro-X Products ...... 76 SR Batteries ...... 82 Beehive R/C Model...... 82 Midway Model Co...... 64 St. Croix...... 89 Byron Originals...... Cover 2 Midwest Model Supply ...... 84 Tangerine M eet...... 88 Bud Caddell Plans ...... 69 Model Rectifier Corp. (MRC).. Cover 4 Tatone Products...... 95 Campbell's Custom K its ...... 72 Walt Mooney ...... 96 T&D Fiberglass ...... 87 Circus Hobbies ...... 3 Sid Morgan Vintage Plans...... 88 Technopower II. Inc...... 89 Jim Crocket Replicas...... 77 Novak Electronics...... 65 Teleflight Research...... 72 Davey Systems Corp...... 75 Octura Models ...... 71 Uber Skiver...... 91 Du-Bro Products...... 83 Pacer Technology & Buzz Waltz...... 95 Electronics Model Systems ...... 74 Resources. Inc...... 101 Williams Bros...... 66 F A.I Model Supply ...... 75 Peck Polymers...... 94 Wilshire Model Center...... 87 Fox Manufacturing...... 64 Pierce Aero Co...... 68 Wolff-Pak ...... 93 Dick Hanson...... 104 John Pond O/T Plans ...... 97 Nick Z iro li...... 81 Hobby Horn ...... 84 Precision Sanding Tools...... 78 77 Products...... 74 Ikon N'Wst...... 78 Proctor Enterprises...... 90 H O U S E A D S Indoor Model Supply...... 68 The Prop Shop...... 80 Binders ...... 102 International Modeler Show...... 85 Radio Controlled Models (RAM) ... 76 Full-size Plans Service...... 98 Jomar Products...... 100 R.C. Sweitzer Ent...... 73 Limited Edition Prints ...... 103

R/C STANDOFF SCALE plans with construc­ CLASSIFIED ADS tion manual. Curtiss Hawk P6E two-inch IMPORTANT INSTRUCTIONS: Non-commercial (personal items) rate is 25 cents per word, scale. $15.00. quarter-scale. $25 00 Stinson with a minimum of S3.00. Commercial rate is 40 cents per word, with a minimum of $5.00. SR9 two-inch scale. $17 50. quarter-scale, No advertising agency discounts allowed. $27 50 Stearman PT-17 two-inch scale. Name and address free, phone number counts as two words, abbreviations count as whole $21.00. quarter-scale, $35 00 All postage words and w ill be spelled out. paid. Catalog $1.00. Richard Barron 11506 All ads are payable with order, and may be for any consecutive insertion period specified. Ohio Ave.. Youngtown, AZ 85363 Send ad payment to: MODEL BUILDER, Classified Ads, P.O. Box 10335. Costa Mesa. CA 92627-0132. FORSTER IGNITION ENGINES. English and Chinese diesels, parts, and supplies. Visa. Mastercard Send SASE to M&G Engines. P.O Box 6026. Denver CO 80206 FOR SALE — Over 400 antique model UNUSUAL Rubber. CO2. and Peanut Scale airplane engines Send name and address to: plans HE-219. JU-87. Farman Goliath, and FIFTY CENTS brings list of new/used model Jim Robertson. 35 Slonecrest, St Joseph, MO 30 more Send $1.00 for catalog to Haught motors, accessories, balsa kits Motor trade- 64506 Graphics. 5460 Southbrook. Ft Wayne. IN ins wanted T Crouss. 100 Smyrna. West 46815 Springfield. MA 01089 SCRAPBOOK OF SCALE by Bill Hannan Twelve 3-views, photos, philosophy and ANTIQUE MODEL AIRPLANE KITS for sale: LIST YOUR RADIO EQUIPMENT for sale No whimsey $9.95 postpaid, or send SASE for U/C, and solid scale Stanzel; Edco: Girard; fee for listing Escrow available Send SASE descriptive leaflet W.C Hannan. Box A. Modelcraft. etc Send SASE for list Charlie for details Radio Equipment Exchange. Box Escondido. CA 92025 Oehler. 13 Dogwood Dr. Smithtown, NY 561, Park Forest. IL 60466 11787 JET-TRON SPECIAL OFFER' For Sunday NATS WINNING Bellanca Aircruiser, Senior WANTED — OLD MODEL ignition engines flying, pattern trainer, or fun-fly contests Indoor and Outdoor Rubber Scale. Plans cars, etc Paymgtopdollar Bill Simpson. 7413 You'll be thrilled with the flight performance! $1.50. Send SASE for list. David Aronstein. 50 Via Lorado Rancho Palos Verdes. CA 90274 All balsa construction See review in RCM, Pasture Lane, Poughkeepsie, NY 12603 (213) 377-3532 April 1983 issue Engine. 40 to 51. wing area. 600 sq in weight, 5 lbs, radio 4-channel RAZOR BLADES, single edge industrial first WANTED Spark ignition model airplane Special offer. $49.95 plus $3.00 shipping quality — extra sharp: 100/S4 25.200/58 00; motors parts race cars. Circa 1930-1950 California residents add 6% sales tax Ricks 300/511 75: 500/S19 25. 1000/537 50 Russell Stokes. Rt 1 Box 520. Keller TX Kits, P.O Box 1106. Santee. CA 92071 (619) Postpaid in U S Cobbie s Gifts, Postbox 2. 76248 449-3316 Deal. NJ 07723; (201) 922-9898 COMPUTER CONTROL OF R/C SERVOS - NEW SPACE SHUTTLE GLIDERS: build BEER CAN BOMBERS — High performance Control up to six servos with your Timex hand launched gliders from lightweight hundreds from common household supplies TS-1000/1500 or TRS-80 Personal Com­ for under $1 00 Complete information and aluminum beverage cans Two full-size puter Perfect for winter protects, robotics, patterns with illustrated fabrication and flying plans $3.00 Send check or money order model actuation experiment! Software and Stan-Zak Gliders. 2842 N Sacramento instructions. Send $4.00 to: Beer Can Bomb­ application notes included Write for free Chicago. IL 60618 ers, Box 97. Southeastern. PA 19499 information or send $10 00 for plans, or PLANS: Mini Paagan by Denny Davis Nos­ $39.95 for complete kit Satisfaction guaran­ FACTORY SALE Ras Stik 25-40 fun flier, 51 - talgia Third Payload at 1983 Nats' Postpaid teed Fratello MicroElectronics. Department B1. P.O Box 4007, Hampton, VA 23664 inch foam wing, balsa fuselage Sale price $4 00 Stephen Landy. 44 Chaplin Road, $24.95. or with two rolls Econokote (colors: Newton Centre, MA 02159. red or white only) Fox 36RC «23900 core P-51B SCALE DRAWINGS Accuracy guar­ glue, fuel tank, wheels, motor mount $79 95. GRUMMAN F7F-3 TIGERCAT plan. 1 /24- anteed. Four sheets 24 x 36:3/< in = 1 ft $15 00 Only 12 left Handling charge $3.00. add scale free flight rubber, or CO2 Postpaid rolled, postage paid. SASE for details. Charles $2 00 for C O D GT Models. PO Box 869. $4.50 SASE Tor complete list. David Diels. Neely 2703 E Goshen A ve , Visalia. CA Rantoul. IL 61866. phone (217) 893-4136 PO Box 101. Woodville. OH 43469 93291 little more than enclose all the needs. said was that the “same wheels” had to were installed ME 109 style, and there Going "gung-ho” with the design be used, nothing was said about their was wonderment about the feasibility, meant using a retractable landing gear. position. however this created no problem. Getting the wheels up seemed feasible, As you can see, the solution was not to The operation was simple, with the but the rule said you must “ land on the retract them completely, leave enough gear down, the timer extended and was same wheels” you took off with. With sticking out so that a landing could be locked. With the wheels forward of the what was available to work with, just made. A small auxiliary wheel was also strut’s pivot, the weight of the model getting the gear to come up would seem included to prevent scuffing the nose on kept the gear from moving back on the like a major achievement. All the rules touchdown. For simplicity, the wheels ground. At launch time, the timer was 99 dozen or so of us die hards huddled Why Stop Short of Full Scale Performance? under a tarp cover for awhile . . . then Twin Engine Sync System - For Perfectly matched RPM over the the wind blew it down. Total misery. Bernard Cawley rose to the occasion entire throttle range - $60.00 and showed us why he was picked as the Accessory Controller - Allows ON-OFF control of TWO electric fearless leader for the event. He got permission from the BoeingTennisClub devices from ONE channel - $35.00 to use their lounge for a meeting place, SC-1 Electric Motor Speed Control - For use with 02 to 20 size and so we adjourned there. This worked out very well, and we had the electric motors up to 18 cells - $49.00 clinic, information trading (that sounds good!), and the prize awards there. SC-2 Electric Motor Speed Control - For Cobalt & High As we could not fly, we awarded the Performance motors up to 50 size and 26 cells. Includes BRAKE prizes on the basis of the best looking and BYPASS options! - $60.00 *DEALER inquiries in v it e d * plane, the best design, the best scale, the r SEND S.A.S.E. FOR PRODUCT INFO best small plane, who came farthest by 2028 KNICHTSBRIDCE DRIVE air, who came farthest by car, and who JOMAR PRODUCTS CINCINNATI, OHIO 45244 came from a foreigncountry. Bill Kubiak, from Minnesota, got the prize for driving released, and as the model left the very well with gear or belt drives, but the the farthest. Bruce Klees, from Anchor­ ground, the gear WANTED to fold Super Montereys did not do well with age, Alaska, got the prize for coming the backwards. The timer pulled a latch their direct drive 05’s. farthest by air, and Steven Stevens and allowing a light spring to assist the The wind produced lots of broken Emil Socher shared the prize for coming action. The action was set to occur wings, which kept the repair side busy. from a foreign country, Vancouver within the first couple of laps. Actually, Good flights often went unnoticed . . . Island in Canada. Everybody got to pick the landings were probably better than electrics are so quiet! A good PA system their own prize. A very special thanks they would have been with a normal helps to call people’s attention to what’s must got to Astro Flight, Leisure Elec­ gear, the usual tendency to bounce was going on. tronics, the Boeing Hawks, and the not there. Heinz has a hint for straightening Anchorage House of Hobbies for their Another portion of the rules was a bent motor shafts: use a round disk with support. pain. Free flights had weight rules which a hole in the middle, attach it instead of a Steven Stevens got the most benefit were supposed to help equalize per­ prop, then bend the shaft back until the from the clinic, he had built a Leisure formance it seems, but what good a disk is running true. That’s a handy hint! Playboy and put an Astro 05 XL in it, but it minimum weight would do for C/L was a A disk cut with a hole saw, a can lid, or a would barely fly. I found an unsoldered mystery. Yet the rule was there. Even wheel should do the trick. lead in the battery pack, just bare wire, with the weight of ignition and the And, last, and perhaps least, Heinz no solder at all! It was surprising that the retract gear, ballast had to be used to get thanked me for a hint I gave in one of my plane flew at all. to three pounds. Memory says over a columns, when I mentioned that I go to Finally, at three o’clock, the rain quit half-pound was needed, and the major fly my seaplanes at 6 a.m. Heinz told his and we got to do some flying. Unfortu­ problem was room to stow it in. Such wife, "That’s crazy!” then he thought of nately, Bill Kubiak had to leave before were the growing pains we had to live two facts: there is a nice school yard then and didn’t get to see or do any with until we learned what these new­ across the street from his house with a flying. I was especially sorry about that as fangled controliners were all about. big green field, and that he had not yet he had come such a long way, and I One thing that the rules did do was made a single flight this year. So now he would have liked to have seen his plane create a model of a size and type which gets up an hour earlier in the morning, fly. It is his original design, with an "Old was a joy to fly. At that time, most does his electric flying in the cool, calm Timer” look, much like a Playboy with a "sport” C/L designs were in the 60 mph morning air, and then is off for work! shorter pylon. The fuselage is much range, all the additional speed did for Those people who were awake at that narrower than a Playboy’s. It was incred­ the Speedwagon was make it "groove” hour were impressed, and all liked his ible to see a radio, three servos, and a even better. flying. Of course, Heinz! I found out the motor pack squeezed into such a small I wish I knew what finally became of same thing! space. You have a lot of patience, Bill! this model, it was flown for a consider­ We were so conditioned by years of Bill also carves his own props, and able amount of time until a rules change gas flying that we fail to see the obvious explained his techniques to us. How outdated it, after that there is no mem­ . . . early morning, electrics, and flying about an article on that sometime, Bill? ory. I don't recall ever crashing it, go together like peaches and cream. Bill uses balsa block, and doesn’t need to perhaps it was simply retired and even­ But, can you imagine flying a gassie at use a fuse, as the props will break before tually passed on to someone else . . . In 6 a.m.? Don’t try it, or if you do, I’m not the motor will burn out! Repair is easy, any event, it did light a fire which responsible for your bail! I can’t imagine with cloth and Hot Stuff. Making your burned brightly for quite some time a worse way to ruin modeling’s public own props does do away with the before tapering off to just embers. . . · image! problem of finding the right prop. On the other hand, the early morning The best prop for the speed reducers light and an electric plane floating in the seems to be the Rev-Up 11-7.5, but the Electric------Continued from page 25 cool air, are enough to make a photo­ Rev-Up brand is hard to find. Top Flight grapher grab for his camera, and soften props also work well in this size. There were: local dealers do not handle elec­ the heart of even the most hardened. are some other brands (black, fiber- tric stuff, and sometimes will try to Electric flying is such a clean experience. filled plastic types) that are notably bad, discourage modelers from using it. (I But enough, back to business. Thanks, they produce very little power for their have noticed this too, and I don’t Heinz, for your report. size. Stay away from the “ black ones.” understand why.) The Astro gear drives The Boeing Hawks meet was Septem­ Anyhow, as I recall, Bill found that his are steel and produce metal shavings ber 18, and we just didn’t have the luck 11-7 hand carved props were the best which get into the motors and bearings on weather! The day before was fine, size for him too. (Astro says to lubricate the gears often); only a little wind, and a light overcast. Bruce Klees showed us his very small the Radio Shack microswitches do not The whole week since has been letter transmitter, made by Omni Electronic handle current over 12 amperes. (I have perfect, with blue skies. So, wouldn’t Systems, and the new Novak two-chan­ given upon Radio Shack microswitches.) you know it, the day of the fun fly the nel receiver, the NER 2S. Omni is a In the hot humid air the Leisure winds were in the 20 mph range, and the California company, unfortunately, I Playboy and the Astro Porterfield did rain was coming down in buckets. A didn't get the address. The transmitter is 100 MODEL BUILDER STICK IT. KICK IT. UN-STICK IT. ANY WAY YOU WANT IT!

THICK, GAP FILLING INSTANT ADHESIVE

• Gap filling formula cyanoacrylate E u l e s s adhesive. Bonds virtually everything: All woods and 2 oz. net wt. (56.8 gm.) PC-01 S9.25 veneers, cork, vinyl, naugahyde, fabrics, 1 oz. not wt. (28.4 gm.) rubber, leather, plastics, metals, stone, PC-02 $4.79 p o rc e la in Va oz. not wt. (14.2 gm.) PC-03 $2.79 Works on oily surfaces—fuel soaked Vi oz. not wt. (7.1 gm.) planes, cars, boats—pre-stained miniature PC-04 $1.89 p ie c e s ZAP-A-GAP'/CA +IM to (III im­ perfect Joints

ACCELERATOR FOR SUPER GLUES

• Forces immediate cure of all cyanoacrylates. • Expands gap filling ability. • Use for structural fillet forming.

'h (I. oz. (15 ml.) Solves tough-to-bond combinations of z C - PC-21 $2.59 materials. 2 fl. oz. (30 ml.) PC-15 $4.98 Handy glass bottle with pump sprayer! Apply heavy ZAP-A-GAP* C A+IM fillet, then kick it

DEBONDING AGENT FOR SUPER GLUES

I ’ ^ jr f Removes cured cyanoacrylates from skin, work surfaces, etc. Patented technology/safer water based I k # · i chemistry. • Will not craze most plastics/safe for plastic covering materials. 1— 1 fl. OZ. (30 ml.) PC-16 $3.25 • Use to remove acrylic, enamel, and A p p ly DEBONDER to cured epoxy paint overspray/use to “weather cyanoacrylate, allow to penetrate to dissolve unwanted bond and highlight'' paints.

Available From

West Central . |rob.artJ“z Æ ^ * 1 - FRANK Τ ΤΙΑΝΟ .1/Λ CUtCUDOlCCC ENTERPRISES 20134 STATE (312)584-7616 628 RT 3? NORTH CERRITOS. CA 90701 N EW PIA TZN V 1756· P a c e r (213)860-1276 (914) 658-9906 Technology & ResourcesΨ Inc. 1600 DELL AVENUE ■ CAMPBELL CALIFORNIA 95008 ■ (408)379-9701 TELEX: 172435 (Pacer Tech Cmpl) (800) 538 3091 (Except California)

PACER TECH ... settinq the pace for technoloov the fun fly, but we flew it the day before ive. Electrics are fun because you can on its maiden flight. The 035 does fly it, pick rare scale planes, and get them to though the climb is a bit slow. The best build and fly well. COVERUP! combination would have been the 035 Well, for a conclusion, the Boeing on belt drive, that would have hauled it Hawks will make this an annual affair, Sturdy, high quality, rich dark right up. The Super Sniffer has about 350 but in the future we hope to schedule it green vinyl-covered binders for square inches, and weighs about 32 for Saturday, with Sunday as an alterna­ your valued copies of M ODEL ounces. Bruce has been flying electrics tive, so that people who have a long way BUILDER Magazine. Gold let­ for five years, and knows his stuff, if you to travel will have a better chance to fly tering on spine and front cover. live in Anchorage, look him up at the and see some flying. This is usually a Anchorage House of Hobbies for advice good time for fair weather in Seattle, but on electrics. Thanks for coming south, we got unlucky. Those who came, Bruce! however, found it worth their time. Bernard Cawley had a neat little And now for a couple of “ handy Schoolboy with three channels and an hints” items. Bill Doyle sells a fuse Astro 020 in it, at only 14-1/2 ounces. The installation kit that is well done. The fuse Schoolboy is an old favorite of mine, I holders are insulated, and the instruc­ learned to fly with it, with rudder only, tions are excellent. Bill charges $2.50 and tested the first Astro 020’s in it. It is plus 50c for postage, and you can get the the best sport 020 plane I know of, but it kit from him at 1929 Oliver St., Apt. A, is hard to find. I think you can get it at San Diego, California 92109. Hobby Shack in California (it is kitted by The other item is a new motor by Top Flight). Leisure. It is a “sleeper” ! Leisure sells it The overall weight that Bernard's as part number 1002A, Off Road Stock Schoolboy came out weighing is amaz­ Bushing Motor, for the off road car ing; my electric 020’s weighed that much racers. This motor looks like a sports with rudder only. Bernard is using the type 05 motor from the front, with a S22 micro servos by World Engines, and plain bearing (not ball bearing), but the he says that they are impressive. They back is all new. and good. It uses pigtail O ne B in d e r ...... $ 5 .9 5 weigh only .7 ounces, and have more type brushes, spring loaded like the LT50 Three Binders . . . $15.95 power than any servo their size. Their Leisure motor. It runs very smoothly, Five Binders .... $ 2 5 .9 5 price is right too, $17.50 at Indy R/C. The and turns a Cox 6-3 gray at 14,000 rpm at photo shows how neatly they fit into the 12 amperes, and a 6-4 Cox gray at 12,300 (For more than 5, include tiny, 28-inch span Schoolboy. It all looks rpm at 15 amperes on six Sanyo sub-C S5.00 for each additional like a normal-sized plane! cells. This is good power, right in there binder.) Bernard also found some 1/2 sub-C with the LT50 pattern wind and the Astro Shipping: Binders shipped in U.S. Sanyo cells at a local hobby store, and is 05XL. using these instead of the usual GE cells. And now for the best news; it retails by UPS only. For one hinder, add He swears that these have given him a for $15, and most places that stock off SZ 00. For each additional hinder·, boost of nearly a thousand rpm com­ road parts will have it. I plan to fly it. and add 75c. For binders shipped out­ pared to a stock pack. if it is as good as I think it will be, I will be side U. S.. add S3.50 for one bind­ You can also see his receiver pack in using it to replace my sport type 05’s as er. For each additional hinder, add the photo, this was made from the 65 they wear out. Let me know how you like it if you try it, I do think it is a SI. 50. For Air Mail rates overseas, mah cells pulled from a General Electric GE 9 rechargeable nine-volt transistor bargain. please inquire. radio battery, which contains six cells. Till next time, fun fly with electrics!· PLEASE All payments must be in U.S. This makes a pack that weighs just under funds, drawn on a U.S. bank. an ounce. California residents add 6% Sales Tax However, Bernard has noticed (and so Counter____Continued from page 10 have I) that the seals on these small cells MODELS are not as good as the ones on the larger these beauties is $59.95 for the Single, cells (AA, sub-C. etc.), and they leak and $174.95 for the Twin. A catalog ot all BUILDER electrolyte slowly but steadily. This of Cannon's wares is available for a buck, 621 West Nineteenth St., Box 10335 shows up as crystals at the end of each write to the above address. ★ ★ ★ Costa Mesa, California 92627-0132 cell. There seems to be nothing to be done to prevent this (perhaps some Hot Coverite has announced its latest Stuff might seal the edges?), so the airplane kit. the Art Chester jeep. Like its smaller than the Cannon 801 system, lifetime of these cells is probably limited predecessors, the Gee Bee Sportster. which makes it very small indeed, just to about a year. If you are using them, and the Gee Bee Model E, the Jeep is a perfect for traveling. I looked inside, check their capacity every couple of replica of a Golden Era racer. and the workmanship is immaculate. months. The Coverite jeep is slightly larger Bruce is quite happy with it. Bernard uses a Royal two-channel than 1/4-scale with its 52-inch wingspan, The NER 2S receiver is really a little receiver for the radio. Unfortunately, yet it was designed to be flown with a gem. less than one ounce for two chan­ the receiver crystal got damaged, so .40-size engine. The jeep builds quickly nels, with a single IC handling every­ Bernard couldn’t fly. I'll bet it flies well and is perfectly color matched when thing. I am glad to see this, it has been a once the crystal gets fixed, all of my covered with Coverite’s Cream Perma- long time coming. If you can build a Schoolboys were a real pleasure to fly. gloss and trimmed with Coverite’s Black computer in a chip, why not an R/C One more plane, and then to other Baron Epoxy aerosol paint. receiver? It gets rid of that many more topics . . . Dave Katagiri brought in his The kit includes die-cut and machined components that can go wrong. Unfor­ Broussard MH 1521, a rare French bird. It balsa and ply parts, molded cowl and tunately. as I understand it, it cannot be looks like a Beaver that got a twin tail, wheel pants, preformed landing gear, expanded to more than two channels. I and it so happens that it served thesame rolled plans and construction booklet. wonder why, it would have been simple role astheBeaverin the French airforce. List price is $99.95. to “ pin out" the clock signal, which is all Dave is doing an immaculate job. It will For more information, contact tha! would have been needed. use a Leisure LT50 pattern wind motor Coverite, 420 Babylon Rd., Horsham. PA Bruce brought his Super Sniffer, with and gear drive. It has the distinctive 19044. (215) 672-6720. an Astro 035 installed. He didn’t fly it at French look about it, and is quite attract­ ★ ★ ★ 102 MODEL BUILDER 1

Send check to: MODEL BUILDER MAGAZINE Attention: LIMITED EDITION PRINTS A Perfect Christmas Gift Box 10335, C O STA M ESA, CA 92627 PLEASE SHIP ME A LIMITED EDITION LITHO PRINT OF ROBT. A. BENJAMIN'S PAINTING OF HAROLD KRIER'S GREAT LAKES SPECIAL. A CHECK OR MONEY ORDER FOR $50.00 PLUS $5.00 FOR SHIPPING AND HANDLING IS ENCLOSED. CALIFORNIA RESIDENTS ADD 6% SALES TAX.

NAME STREET (Please print) CITY, STATE. ZIP

Clip this coupon or make a copy As new radio systems were developed, DALOTEL - TIPORARE — C.A.P.21 and more controls became available (throttle, elevator, etc.) multi-control 7 5 0 and single channel control aircraft had to be divided into two competition 9 m r .:-. 8 2 5 classes. But then the Rube Goldberg modelers began to develop ways to get more than one control function out of single channel. Using cascaded com­ pound escapements, for instance, it was possible to obtain rudder, elevator, and AMA or FAI throttle (but only one control at a time) OUR DESIGNS ARE IN out of one channel. You had to have a COMPETITIVE AIRFRAMES fo r THE WINNERS CIRCLE clever thumb on the push-button! Once PATTERN FLYERS 1978 - 1983 again a class separation was established: KITS OR AIRFRAMES DICK HANSON MODELS Rudder-Only with throttle, Intermediate BUILT TO ORDER 5269 LUCKY CLOVER LANE (any controls you could get out of a WRITE OR CALL MURRAY, UTAH 84107 single channel), and Multi, which by FOR INFORMATION PHONE (801) 261-1402 now had elevator, and throttle. And about this time, and not until then, Shifting our attention to a different same high quality service and rapid multi radios were developed that al­ kind of racer . . . Jim DeYoung has turnaround that built Kraft’s reputation lowed two simultaneous controls at the announced the release of his newest in the past. same time. Wow! design, the Jim DeYoung 1/4 Midget “ Their new telephone numbers are Later, as the distinction between Folkerts Racer fo r. . . you guessed it . . . (619) 433-1628 and (619) 433-1629. Intermediate and Multi became harder Quarter Midget Pylon racing. "Kraft National Service is an indepen­ to define, and as Rudder-Only models You won’t find this one of the shelf at dent company and all their records are became freaks with proportional servos your local hobby shop, however, as Jim separate from Kraft Systems. All repairs on rudder and throttle (and upthrust is offering it through direct sales only. in the future should be sent directly to was used on the engines to practically The $85.00 (C.O.D. or advance pay­ them or to any of the other authorized give you proportional “ up elevator” ) ment only) kit includes: fiberglass and service centers. (List available from Kraft the control divisions were dropped and Kevlar fuselage; fiberglass hatch, cowl, Systems, Box 1268, Vista, CA 92083.) Any replaced by skill divisions . . . by now, and exhaust channel; precision-cut repairs received at the factory will be most everyone was flying multi-propor­ foam wings; spinner, shaft extension, forwarded immediately to Kraft National tional. and other front end hardware; pre­ Service. It is our understanding that they The purpose of this little history lesson drilled Dura! landing gear; full-size will be shipping all repairs C.O.D. until is to make R/C modelers of recent plans. further notice." generations a little more aware of some Contact Jim DeYoung, 16627 Dobson, WHATINELL’S RUDDER-ONLY? of the skills that are no longer required South Holland, IL 60473, (312) 339-9541. “ Rudder-Only” is an ancient radio in flying modern R/C models. controlled model airplane expression Wouldn’t it kinda be fun to organize ★ ★ ★ which is only truly understood by a and conduct a rudder-only contest Last, but by no means least, we come diminishing group of R/Cers who were now? There are plenty of rudder-only to a really handy little gadget for use active in the hobby back in the 1950sand capable model kits available. As for with 1/2A engines. B&R Hobbies. P.O. early 1960s. “ Rudder-Only” meant just controls, maybe two classes; with and Box 192, Oscoda, Ml 48750, (517) that . . . the only (sometimes) movable without throttle. Today’s proportional 739-3544, introduces its hand held, control surface on the R/C model was radios will make rudder operation much rechargeable glow head energizer called the rudder, and if operated by a rubber more reliable and exacting, but the skills the Half Shot. band powered escapement, it simply involved in obtaining maneuvers, even If you're tired of lugging those big dry went to the full offset position, with no learning to maintain altitude without cell batteries around, you should give stops in between, and stayed there until throttle control, are challenges that this little gem a try. Order it through you released the single push-button on could really spice up a club contest. your dealer or direct. Comes with the transmitter, at which time the rudder We’re sure that AMA can supply copies charger and instructions for the intro­ hopefully returned to neutral. of Rudder-Only rules from years back,or ductory price of $19.95 (plus $1.50 We say “ truly understood” rudder- you’ll find the maneuver lists in some of postage and handling). · only because, unless you actually flew a the old mags. Maybe next month we’ll model by rudder control only . . . and try to describe how some of these R/O Workbench ... . Continued from page 6 that really means only, my friends, not maneuvers were accomplished. even a throttle control . . . you have no If there’s interest out there, let us believe this is the result of temporary knowledge of what it was really like. know. Perhaps we can publish some of swelling in the backbone area, which With a properly trimmed model, it was real good rudder-only models from the has pinched off most of the nerve sometimes possible to take off (most past, and offer plans. If you have any that system. Dan has been in and out of were hand launched), and usually pos­ show all the ribs and bulkheads so the intensive care, cannot be visited or sible on command to do three barrel models can be scratch-built, let us called at this time (October 9), but you rolls, at least one loop and maybe more, borrow them to make copies. We can send notes or whatever to him at Tri wing-overs and stall turns, spiral dives already have the “ Trixter Beam” (N o. City Hospital,4002 Vista Way, Oceanside, (sometimes without command!), Cuban 6741, $4.00), Walt Good’s "Rudder Bug” California 92506. Eights, and dead-stick spot landings (No. 5783, $5.00), Hal DeBolt’s “ Live AND AT KRAFT SYSTEMS (always dead-stick, but not necessarily in Wire Trainer” (No. 9782, $4.00),and Fran “ As of October 1,1983, a new Author­ the circle). McElwee’s “ Robot" (No. 1792, $6.00). ized Service Station, Kraft National Why the distinction “ Rudder-Only” ? MERRY CHRISTMAS! Service, Inc., will handle all warranty and The first model R/C aircraft had only It’s only October as this is being non-warranty repair work sent to the one signal or channel on which to written, but you won’t see it until the factory in Vista. Located at 1919 Apple operate. Depending on the type of first of December. Such is the monthly Street, Oceanside, CA 92504, the new escapement used, right or left rudder magazine publishing business. Have a company was formed by the same tech­ was attained by various combinations of real nice holiday season and a successful nician group who worked in the factory button pushing. There was only one 1984. Hope to see you sometime, some­ repair department, and will offer the class . . . Radio Control . . . period. place during the coming year. ·

104 MODEL BUILDER rø r STUFF” & © M l P i B “T ? MODELING’S ONLY ALL AMERICAN INSTANT GLUES BAR NONE! THAT’S RIGHT FROM THE VERY BEGINNING OF THE “ HOT S T U F F » REVOLUTION, IN 1971, “ HOT STUFF» PRODUCTS HAVE BEEN TOTALLY AMERICAN. S aåetäfe O to c o n t in u e s t h is p o l ic y w it h t h e introduction o f “ HOT TIPS» OUR EXCLUSIVE NEW APPLICATOR TOP. ----- f “HOT TIPS”» DESIGNED BY MODELERS FOR MODELERS —EXCLUSIVE FEATURES— 1. FINEST TIP Gives you best control for each application 2. LONGEST SPOUT For those hard-to-get-at jobs 3. EXCELLENT DRAINAGE Helps keep the clogs away 4. RETRACTING CAP One twist keeps cap far away from tip 5. DRIP GUARD Helps keep excess glue away from fingers

6. BUILT-IN TUBING HOLDER FOR 12 YEARS Tubing supplied to use if you wish MODEL BUILDING’S (1 /2 oz. & 2 oz. only) STATE OF THE ART _ INSTANT GLUES H S T -1 w oz. H S -3 2 .9 5 3 OZ. 3.95 “ H O T S H O T ' HS-1 % OZ. HS-4 ECONOMY 2 .9 5 2 O Z . 9 .9 5 End To Vibration And Noise... As a quarter scale flier you’ve had little choice Specifications ΒΗΡ 13 al 11.300 RPM in the selection of power. You either went Speed Range 2.500 to 11.500 RPM with an underpowered engine, or Cartxiretor Enya G-8 Type with detachable suffered the indignities of noise and 7 mm venturi vibration that modified chain saw Weight 28 oz. (28% oz with muffler) engines produce. Either way, it Length 6 ' Hght 5* Width 2%" took some of the fun out of your quarter scale excitement. New Technology For More Power... Less Weight Enya’s .90 4-cycle has changed all th a t It features a technology that delivers a 50% increase in power over .60 size 4-cycles, yet increases weight by only 30 percent What’s more, this powerhouse is quiet... sounds realistic and its vibration is near nil. Unlike balky gas engines, this 4- cycle was designed speci­ fically for R/C flying. No Modifications Needed - iEnya’s .904-Cycle...

For instance, you no longer need a Powerful special pumps for handling gasoline.' Enya’s .90 4-cycle runs on regular model airplane fuel. You’ll be using Note the safer, more familiar fuel in your built in new manual choke precious model. There’s no “special valve (or modification” or “suggested accessory” sale needed to make the .90 - 4 cycle run and easy reliably; after all, Enya dependability starting Achievement and engineering are built-in. Meeting " all FAI scale rules for displacement you'll find that its high torque and low idle speed means you can swing big props at realistic RPM’s. For Quarter And operation is smooth throughout the power range. There are no rough spots as you go from idle to all out And without the dreaded vibration, your radio and plane will last longer. The small muffler included with the engine reduces noise to absolute minimum Scale Fliers. levels. We’ve also built rocker arm covers and pushrod shrouds that’ll keep the moving engine parts free from dirt The built in manual choke valve will also help you start this gentle giant easier and safer than the “gassers”. And, of course, the optional muffler extension makes it easier to install in a scale model without any unsightly mufflers poking out Enya Model Engines If you’re looking for realism, power, and smooth operation for your Altech Marketing big size beauty, Enya’s .90 4-cycle is a quarter scale revolution ... P.O. Box 286 Fords, NJ 08863 see your Enya Dealer and put away your chain saw. 201-572-5792