m m MARCH 1982

volume 12, number 122 THE DYNAMIC DUO

There's no better winning combination than a Halt Baron 50 helicopter and JR Unlimited helicopter radio. This Dynamic Duo of engineering excellence was flown to victory by Mike J. Mas in his recent win in the expert division at the 1981 Nationals. Becoming a champion is a selective process. Each step a decision. Thats why Mike chose a Halt Baron 50, sim ilar to the one shown and a JR radio. The kit is quick and easy to assemble, there are no wooden parts to cut out and fit. The main rotor blades are completely finished and balanced. The collective pitch rotor head is factory assembled and fully ball bearing supported. The aluminum engine mount is machined, drilled and tapped to fit most of the popular .60 size engines. Vacuformed body and canopy are shock mounted on rubber grommets for longer life. Each kit comes complete with all the necessary hardware and accessories including: fuel tank, universal servo tray, and linkages to complete the assembly of this outstanding helicopter. All you need is an engine and radio system to be ready to fly. Best of all, we ll keep you flying longer because we have a complete selection of factory parts in stock.

So, when you're ready to put the Dynamic Duo to work for you, we'll give you a choice of 10 Halt helicopters and a wide variety of multi­ channel JR radios. For more inform ation call or write Circus Hobbies, National Champion Mike J. Mas

Halt, JR, Webra, and IM are imported exclusively by Circus Hobbies.

Send $1.00 for complete product catalog.

New address: H0ŽÍM M S5 Circus Hobbies Incorporated, 3132 S. Highland Dr., S^cut ces** Subsidiary of Circus Circus Hotels Las Vegas, Nevada 89109 · (702)731-6472 Flex 4 chassis, a totally new design featuring s h o c k - dampened front and tear roll rates and a trailing lin k controlled beam axle. That gives the RC12i a siusp en - sion without springs, to isolate the radio and batte nes While the tires of the amazing RC12I follow the contours of the track, from excessive vibration for maximum traction every the central chassis, radio equipment and batteries remain stable for track surface. ------1------Supetlighf graph The RC12i WonderCar. Vanloc* drf axle Accepts all popular radio systems. Nobody knows more about building w nners New SK dual compound hre$ e Team. In just four years our RCT2E wo astounding 10 National Championships, winn ng in every class of competition indoors and out.

Now there's a tew w in n e rfromA sso cl- ated, the RC12Í. We call the RCT2Í the WoinderCa Dar, be- \ Special Sanyo racing bodenes Κ β Ι \ cause it has handling and road hugging chanacteristics n r a r Flex c iw rg io s s chassis ptaie second to none J ______1____

LAT OUT CORNERS THE COMPETITION

And the RC12i isn't all that's new from the Team. Special "SK" dual compound front tires, graphite VariLock diff axles, Reedy Indoor rewinds, plus McRae Can-Am, Brabham FI and Lola T600 bodies are just a few of our latest speed secrets. Keep up with all the action with your free sub­ scription to Racing with the Team. Call or write

The IMSA Champion Lola T600 GTR our newest 1:12 scale body shell. New McRae and Conquest Con-Am bodies also available.

Associated Electrics 1928 East Edlngef/Santa Ana, CA 92705/(714) 547-4986

1981 ROAR Nationals! Boston-M ike lavacot/Team Associated wins Indoor Modified. Reedy motors win All m odified classes for 4th year in a row. MODEL /= MARCH 1982

BUILDER volume 12, number 122 621 West Nineteenth St., Box 335, Costa Mesa. CA 92627-0132 Phone: (714) 645-8830

STAFF

EDITOR/PUBLISHER CONTENTS Wm. C. Northrop, Jr.

GENERAL MANAGER FEATURES Anita Northrop WORKBENCH, Bill N orthrop...... 6 ASSISTANT EDITOR OVER THE COUNTER, John Elliot...... 7 John Elliot R/C WORLD, John E llio t...... 10 ASSISTANT GENERAL MANAGER CHOPPER CHATTER, Ray Hostetler...... 20 Dawn Holcomb SHORT SHAFT, E lo yM a re z...... 22 ART DEPARTMENT "1 TO 1” R/C SCALE, Bob Underwood...... 24 Al Patterson HOW TO FLY PATTERN, Dick Hanson...... 25 FUEL LINES, Joe K lause...... 26 OFFICE STAFF R/C SOARING, Dr. Larry Fogel...... 28 Edie Downs ELECTRONICS CORNER, E lo yM are z...... 32 Deb bee HoJobaugh SPORT SCENE, Larry Renger ...... 33 A. Valcarsel THORNBURG AT LARGE, Dave Thornburg ...... 34 CONTRIBUTING EDITORS PLUG SPARKS, John Pond ...... 35 Dave Brown Joe Klause R/C POWER BOATS, Jerry Dunlap...... 40 Jerry Dunlap Eloy Marez R/C AUTO NEWS, Dan R u th e rfo rd ...... 42 Larry Fogel Walt Mooney ELECTRIC POWER, Mitch Poling ...... 48 Jim Gager Mitch Poling Bill Hannan John Pond HANNAN’S HANGAR, Bill Hannan...... 50 Dick Hanson Fernando Ramos CONTROL LINE, Dan R u th e rfo rd ...... 54 Ray Hostetler Larry Renger FREE FLIGHT, Tom Hutchinson ...... 62 Tom Hutchinson Dan Rutherford Ken Johnson Dave Thornburg Bob Underwood ADVERTISING SCALE VIEWS John Elliot DOUGLAS X02D-1 , Nick Karstens...... 31 Wm. C. Northrop, Jr.

MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC., 621 West Nineteenth Street, Costa Mesa, Cali­ fornia 92627. Phone (714) 645-6830. CONSTRUCTION GREAT LAKES TRAINER, FrankComyns...... 13 Subscriptions: $25.00 per year, $47.00 for two years. Single copies $2.50. Add $3.50 per TWIN PUSHER O.T., Ralph Kummerand David H e cht...... 39 year for postage outside the U.S. (except SIMPLE SIMON, Frank Roales...... 44 APO and FPO). U.S. funds only, please.

PEANUT HOT CANARY, DickSweitzer...... 51 Copyright 1982 by RCMB INC. All rights 1912 BLACKBURN MONOPLANE, Sid M ille r ...... 56 reserved. Reproduction without permis­ sion prohibited.

Change of address notices must be received six weeks before date of issue that new Cover: A modeler's model, the Great Lakes has appeared in a multitude of scale sizes, address takes effect. Send old address with probably beginning with the famous Cleveland Model & Supply line of many years ago. new; old label preferred. Post Office will In fact, it was kit No. SF-1 in the long, long list of Cleveland 3%4-inc scale models. The not forward copies unless you pay extra aircraft on the cover, in one-fourth scale, was designed, built, and has been flown success­ postage. Duplicate issues cannot be sent. fully many times, by Frank Comyns, one of Southern California's leading R/C scale mod­ elers. Frank isn't that competition minded, but his models look and fly well enough to Second class postage paid at Costa Mesa, place high in Precision Scale. Construction article begins on page 13. California, and additional offices.

2 MODEL BUILDER Changing track conditions can servo reverse switch­ Convenient needle valve send RC cars scurrying into the ing. electronic trim, adjustment knob. pits for a linkage adjustment that mixing and throttle Exclusive torque compensation __ _ could take laps to complete. fine tune in the hand­ mixing control. The driver with Futaba's 3FG some brushed alloy doesn’t panic though, because he case. Prefer Twin-stick control? has Total Control on his side. The 3-channel 3FG We’ve built the .'EG model for sou. Available A flick of a lever and the system is available with w ith S26 o r S27 servos. adjustable dual rate takes over. a w ide range of servo options, too. Ultra mini for 1:12 scale electrics, while

Increase or decrease steering S20 servos are perfect boat and gas car racers favor the seno throw while maintaining full lock-to-lock control. The Gentlemen, choose your servos. watertight, heavy-duty S27’s. 3FG gives \ou a choice, on the track. _ And for total performance, The deluxe 3FG/3- the 3FG can be ordered channel svstem includes An oversteering, R3F triple-tuned receiver, with high-torque, coreless 2-S24 servos. NiCads and * >Futabi sliding car charger. 27 and 72MHz. motor S24's and recharge­ instantly able NiCad batteries. responds to the pre-set steering ratio and is dialed-in again.

The 3FG system was developed by and for serious racers. In addition to rate control, you'll also find Track tune your racer from the driver's stand with the new Futaba 3FG.

T3FG

ER WE PUT THE THRILL BACK INTO R/C*

. . . been flying your Revolution I for five years. I know For a beginner in R/C Flying I feel you have come up the quality of your products and have been delighted to with a real big winner - both construction and flying . . . recommend your machines to my flying friends. Thanks keep up the good work. for another fine product that we can all afford! STANLEY A. LEWIS, Age 27 Florida RUSS RHGE, Age 46 California This kit is the most complete and comprehensive I I was surprised at how easy it is to assemble! have ever had. Assembly is a breeze with your fine PAUL MASTERS. Age 15 - Ohio instruction booklet and photographs. WELDON I. HALTOM, Age 32 · Texas . . . wanted one for years. I am truly amazed by the stability of flight I get from my Mantis. Prior to buying my I'm quite pleased with the way the kit was packed and Mantis I had flown only gliders, yet within 3 days I was packaged - it appears to be the best kit I've ever purchased. making coordinated turns, safe landings and nice long THOMAS C. HENRY. Age 35 - Canada flights. I think the Mantis is truly a great helicopter kit! GUY ROY. Age 17 California It flys great, hovers very well.. .1 love it very much. Can't wait until I get the new Super Mantis. I am sending you a The Mantis has a major acceptance here in Rio. picture of my new Mantis. 1 hope you like it. P.S. - Keep up because of the high quality materials employed associated the good work. Happy to fly the "American R/C Way” . with an exceptional low price. That’s Great! FRANK R. CASPER. Age 28 New Jersey ANTONIO CLAUDIO JAMEL. Age 19 - Brazil 'OUTSTANDING!!! Exceeds all expectations, we use I have long been desiring an R/C helicopter. At this O/S Max .40 . . . plenty of power! (after) 4 years flying full cost, yours is a dream come true!!! size aircraft, fixed wing, this model put the thrill back into CECIL R. PARRISH. Age 33 · Illinois R/C. Look for more orders . . . my friends want one too! All claims of ruggedness gladly confirmed! Instructions are very clear. I’m glad to own a Mantis! CARL P. DEAL Jr.. Age 39 · Florida DAVID GUERRA. Age 16 Texas This is the finest kit I have ever purchased.! have been a modeler for 50 years — I am a tool maker and I know quality. This is the best! You may use this recommen­ MANTIS dation for advertising. FIXED PITCH H.H. MOORE. Age 62 - Texas

Still $169 Price subject to change without notice.

* * * American For Further Information Call or Write ( 714) 744-7533 R /C I ie lic o p te r s ,In c . 635-11 North Twin Oaks Valley Road · San Marcos, CA 92069

4 MODEL BUILDER SIG SIG THE LARGEST SELECTION OF AAA AIRCRAFT BALSA AVAILABLE ANYWHERE STICKS «8 Lengths SHEETS 18 Length* BLOCKS 3' Length* BLOCKS 18 Lengths PLANKS 36 Lengths B001 1 16 i 1 16 10 8 061 1 8 x 1 8 20 B 173 1 32 X 2 28 8 251 I X 1 B-333 1 X 1 85 B 206 1 X 1 1 69 B 002 1 16 t 18 12 B 062 1 8 x 1 4 28 B 174 116 X 2 31 B 252 1 X 2 B 334 1 X 2 165 B 207 1-2 a 2 2 25 B 003 116 X 3 16 15 8 063 1 8 x 1 2 45 B 175 3 32 i 2 37 B 253 2 * 2 8 335 2 X 2 2 25 B 208 3 4 . 2 2 65 B 004 1 16 t 14 20 B 064 3 16 X 3 16 32 B 176 18 X 2 43 B 254 1 x 3 B 336 1 X 3 2 25 B 209 1 a 2 330 BO05 1 16 X 38 24 8 065 3 16 X 12 53 B 177 3/16 « 2 54 8 255 2 * 3 B-337 2 X 3 330 B 210 1 12 i 2 395 B 006 1 16 i 1/2 27 B 066 3 16 i 34 70 B 178 1/4 X 2 68 B 256 3 X 3 B 338 3 X 3 4 95 8 211 2 i 2 450

B007 1 16 X 34 37 B067 1 4 x 1 4 46 B 179 3 -8 X 2 76 8 339 1 k 4 280 B 212 1/2 a 3 290 B 008 116 X 1 46 8068 1 4 x 1 2 62 8 180 1/32 X 3 41 BLOCKS 6 Length* B 340 4 35 B213 34 i 3 360 B 009 3 32 X 3 32 12 B069 14 X 3 4 88 B 181 1/20 i 3 43 B-266 1 X 1 30 B 341 3 i 4 690 B 214 1 a 3 450 B010 3 32 X 18 14 B 070 5 16 X 5 16 57 B 182 1/16 X 3 45 B 267 12 X 2 40 B 342 1 i 6 450 B 215 1 1 2 a 3 5 45 B 01I 332 X 3 16 16 B 071 3 8 t 3 8 77 B 163 3/32 i 3 53 B 268 34 i 2 46 B 343 2 ■ 6 690 B 216 2 · 3 6 55 ΒΌ12 332 X 14 20 B 072 3 8 X 12 92 B 184 1/8 X 3 62 B-269 1 X 2 55 B 344 3 i 6 960 B 217 3 a 3 990 B013 3-32 X 38 26 B073 3 8 X 3 4 l 09 B 185 5/32 X 3 67 B 270 1 1 - 2 x 2 66 B-218 1/2 a 4 450 B-014 3/32 X 1/2 32 B 074 1 2 X 12 1 06 B 186 3/16 X 3 76 B-271 2 X 2 76 BLOCKS 2 k B-219 3 4 X 4 505 B 015 332 i 3'4 43 B075 1 2 « 3-4 1 43 B 187 1/4 X 3 88 B 272 1/2 X 3 50 B 354 1 X 1 1 15 B 220 1 i 4 560 B 016 3-32 X 1 53 B 188 5/16 X 3 1 05 B 273 3/4 X 3 61 B-3S5 1 i 2 220 B 221 1 1.2 » 4 7 15 B-Ol 7 18 X 18 14 48 AAA SHEETS B 189 3 8 X 3 1 17 8-274 1 X 3 76 B 356 2 . 2 300 B 222 2 i 4 8 70 B 018 18 « 316 20 B 388 1 32 X 3 1 08 B 190 1/32 X 4 59 B 275 11/2 X 3 91 B-357 1/2 t 3 l 90 &223 3 . 4 13 75 B 019 18 · 14 24 B 389 1 16 X 3 1 21 B 191 1/16 X 4 70 B-276 2 x 3 1 05 B-358 1 i 3 300 B 224 1/2 a 6 6 30 B 020 1 8 i 5/16 27 B 390 3/32 X 3 1 41 B 192 3/32 X 4 76 B 277 3 x 3 1 65 B 359 2 . 3 4 40 B 225 3 4 X 6 7 65 B 02I 1 8 i 38 31 B 391 18 i 3 1 64 B 193 1-8 k 4 87 B-278 1/2 X 4 76 B 360 3 i 3 660 B 226 1 a 6 895 B 022 18 i 1/2 35 B 392 3/16 i 3 2 02 B 194 3/16 i 4 1 07 B-279 3/4 X 4 85 8 361 1 X 4 3 75 B 227 1 1 /2 x 6 1240 B023 18 i 3/4 48 B 393 14 X 3 233 B 195 1/4 X 4 1 32 B 280 1 i 4 94 B 362 2 x 4 5 75 8 228 2 i 6 13 70 B 024 18 X 1 58 B 394 3 « X 3 307 B 196 3 « X 4 1 64 B 281 11-2 i 4 1 20 B 363 3 * 4 920 8 229 3 ■ 6 1925 B025 3/16 X 3/16 24 B 395 1 16 X 4 1 76 B 282 2 i 4 1 45 B 364 1 i 6 600 ΒΌ26 316 a 1/4 30 B 396 3/32 i 4 200 SHEETS 36" B 283 3 X 4 230 B 365 2 i 6 9 15 36"!C-GRAIN AAA 8 12 LBS B 027 3/16 « 38 33 B 397 18 i 4 226 B 134 1'32 X 2 56 B 284 1 -2 x 6 1 08 B 366 3 i 6 1280 B 470 1 32 i 2 62 B028 3/16 * 1« 43 B 398 3/16 X 4 284 B 135 1/16 X 2 61 8285 3 4 X 6 1 28 B 471 1 16 X 2 66 BD29 3/16 i 3 4 53 B 399 1/4 i 4 330 B 136 3/32 * 2 74 B 286 1 i 6 1 50 TAPERED CUT B 472 3/32 X 2 79 B 030 3>16 i 1 65 B 400 3/8 i 4 468 B 137 1/8 i 2 8 4 B 287 1 1 - 2 x 6 2 07 B 430 14 » 3 1 70 B473 18 X 2 89 B 031 1/4 i 14 35 B 401 1/16 i 6 3 14 B 138 3/16 i 2 1 07 B 288 2 X 6 229 B 431 1 4 x 4 2 53 B 474 316 X 2 I 12 ΒΌ32 14 i 38 41 B 402 3/32 X 6 358 B 139 1/4 i 2 1 36 B 289 3 i 6 321 B-475 1/4 * 2 I 44 B033 14 X 1/2 48 B 403 18 X 6 396 B 140 3/8 · 2 1 50 LEADING EDGE 36 Lengths B 476 3 8 i 2 l 55 B 034 14 t i 4 68 B 404 316 X 6 4 57 B 141 1/32 X 3 83 BLOCKS 12" Lengths B085 1'2 a 38 69 B 477 1-32 a 3 89 B035 14 X 1 81 B 405 1/4 X 6 5 16 B 142 1/20 X 3 87 B 299 1 i 1 57 Θ 086 3 4 a 5 8 1 20 B 478 M 6 a 3 97 B 036 5 16 X 516 44 B 406 3/8 i 6 6 55 B 143 1/16 X 3 91 B 300 1/2 a 2 76 B 087 1 i 3-4 1 56 8479 3-32 i 3 1 11 3 4 s 2 B037 516 X 38 55 B 144 3'32 X 3 1 06 B 301 90 B 480 18 a 3 1 31 MODEL BUILDER S B 038 5 16 X 1/2 65 B 145 1 /8 x 3 1 25 B 302 1 i 2 1 10 36 ROUNDED EDGE B 481 3-16 a 3 l 57 ASSORTMENT B 303 BD39 5 16 * 5 8 79 B 146 5/32 X 3 1 35 11/2 X 2 1 32 AILERON 8 ELEVATOR STOCK B 482 1/4 i 3 1 80 B 600 Balsa Wood Assort 10 20 B 304 B 040 5/16 X 1 91 1 52 2 a 2 1 51 B 441 1 4 t | 92 B 483 3 8 · 3 238 B041 3 8 i 38 61 B 148 1/4 t 3 1 75 8305 1/2 a 3 97 B 442 3 8 . I 1 08 VH VERY HARD LAPPED EDGE BALSA SHEETS B 042 3 8 i 1-2 71 B 149 5/16 i 3 208 B-306 3/4 a 3 1 20 B 443 14 . 2 1 45 B 493 1 16 a 3 97 B 610 1 16 X 3 I 4 i 36 I 06 B-307 B043 3 8 X 3/4 85 B 150 3/8 x 3 2 33 1 X 3 1 51 B 444 3 8 a 2 1 64 B 494 3/32 a 3 1 11 B 611 3 32 i 3 I 4 i 36 I 25 B 044 3 8 X l 103 B 151 1/32 X 4 1 19 B 308 11/2 a 3 181 B 495 18 a 3 1 31 B 045 1/2 X 1/2 82 B 152 1/16 X 4 1 42 B 309 2 X 3 2 18 AIRFOIIED SHAPED SHEETS B496 3-16 i 3 1 57 B 046 12 X 3'4 1 10 BULK BALSA 3" > 36 B 153 3/32 X 4 1 52 B 310 3 x 3 330 B i l l 316 X 3 a 36 1 64 B 497 14 a 3 1 80 1 /2 x 4 B 047 1 ? . 1 1 36 Not Stamped or Sorted B 154 1 /8 x 4 1 75 B 311 1 51 B 112 1 4 a 3 a 36 1 87 B 498 3 8 a 3 239 3/4 X 4 B 048 5 8 . 58 96 B 508 1 32 * 3 62 B 155 3/16 i 4 2 15 B-312 1 69 B 113 14 a 4 X 36 2 78 B 049 5 8 i 1 1 4? B 509 1 16 i 3 69 B 156 1/4 X 4 266 B 313 I X 4 1 87 CONTEST BALSA 36" B 050 34 i 34 1 33 B 510 3 32 X 3 81 B 157 3 « X 4 329 B 314 11/2 X 4 239 TAPERED TRAILING EDGE Very Light 4 6 Lb Stock B051 3 4 k 1 l 57 B 511 1 8 * 3 97 B 158 1/16 6 2 42 B 315 2 i 4 290 36" Lengths 8 454 1-32 i 3 92 B512 3 16 » 3 l 17 B 159 3/32 6 2 70 B-316 3 i 4 4 59 B 097 18 X 1-2 41 8 455 1-16 i 3 1 00 TRIANGULAR CUT BALSA 36 B 317 B 513 1 4 x 3 l 32 B 160 1 8 x 6 3 02 1/2 i 6 2 11 B 098 3· 16 X 3 4 53 8 456 3 32 . 3 I 14 B 416 I 4 X 1 4 43 B 514 3 8 · 3 t 75 B 161 3/16 i 6 347 B 318 3-4 a 6 2 55 B 099 14x1 67 Θ 457 18 X 3 1 34 B 4J 7 38 X 38 52 B 162 14 6 390 8319 1 a 6 299 B 100 5 16 i 1 14 81 B 458 3 16 · 3 1 61 B 418 1 2 · 1 2 66 ODDS & ENDS B 163 3 * 6 500 B 320 M « a 6 4 13 B 101 3 8 a 11 2 95 8459 14 i 3 1 84 B 419 34 . 34 83 PACKAGE OF BALSA B 321 2 * 6 4 57 BAGS OF BALSA 8460 3 8 i 3 2 42 B 420 1 i 1 1 10 B 534 Packages 2 15 B-322 3 a 6 6 42 B 524 Bags o t Balsa 3 10 Get uutk tt/ JOIN THE SIG CROWD

SJG JACKETS

AO 002 SB Smafl B>ue AO 00? MB Medium Blu« AD 00? IB Larg* Blue AO 002XLB X ia n * Blue AO 00? SY Small Yellow AD 002 MY Medium V*»ow AD 002 l Y la rg * Y*IKk» AO 002 X IV X targe Yeflow

40 00 1 SigCaptBiu· AB Cloth) 3 n AO 004 Sig Stocking Cap (Blue) 3 75 AO005 8 Men s Mesh Cloth Cap sær Blue and White SIG WING PINS AO 005 Y Men s Mesh CW h Cao The international tad c* conectm* and trading model theme An Yeflo· 37 5 SKi KAM KOOLEK pm* ft** spread to the U S ' Her# » our verson m a chtxce AO 006 Chad s Mesh Cloth Cap ο» gold or Silver background "SIG' n red *nam*i and the 8>ue and White 37 5 At a hot kompet it ion a fher needs to star k od ' This handy •mgs are d u e Th* clasp ha* a lock tfiat prevents it trom AO 008 Θ ladies Mesh Cap red whit# and Okie loam kup with a pia sK * kan kkitcher becoming accident»t unpinned Blue and White 37 5 too i* designed to keep that cola lemonade or other AO0 0 8 Y lad 250 See your dealer first! To order direct, add $1 postage under $10, postage free over $10. No C.O.D. PLACE YOUR ORDER NOW FOR SIG’S LATEST COMPLETE CATALOG - NO. 43 - $2 POSTPAID SIG MANUFACTURING CO., Inc...... Montezuma, la. 50171

MARCH 1982 5 ø/ι; 0 o r / / i r o p # w o r k b e n c h We used this photo in the same spot 10 years ago, but it seemed so appropriate for this time of year (Dec 23) that we thought you wouldn't mind a repeat performance. Scene was about 5 miles outside of Troy, N.Y., in March 1947. Your editor was attending Rensselaer Polytech Institute, and on this weekend, went free flight slope soaring with JASCO 50 and 72 Thermic FOUR DAYS If no one ever built the plane, I can in a smooth path, all the wiggling cancel­ Beginning in 1982, Model Builder understand why! Suddenly realized I ing itself o ut... except on full up, when Magazine's business office in Costa had never really checked the plans the elevator and rudder pulse was real Mesa, California, will be closed on when they first came out. Important slow. At this point, the rear end of the Fridays. Actually, it would be closed the cross-sections were left out, wood and plane would show signs of the control first two Fridays, anvway. New Year's wire sizes were missing completely, and deflections, and the plane would "gal­ Day is on Friday, and Friday, the 8th of some pieces w ouldn’t fit if cut to the size lop” somewhat, thus the name. By January, 1982, is set-up day for exhibitors shown. Several models were built by various means, such as speeding up the at the IMS Trade Show in Pasadena, and others, using copies of my original plans, neutral pulse rate, it was sometimes all of the MB staff w ill be there. so I know the originals were complete. I possible to almost completely get rid of A telephone answering system will be apologize to anyone who finally man­ the gallop. Wow! That is really digress­ set into operation on Fridays. If you have aged to guess their way through the ing!) The Min-X equipment was nice called long distance, your nickel will not construction, or gave up in frustration. because the control stick was built right be wasted. You will be able to leave your Because this ship was such an excel­ into the hand-held transmitter, not name, message, and/or phone number. lent flier, I plan to rework these plans common in those days. It was also one of Business calls w ill be returned on the into a modern version, which we'll call the first super-hets. following Monday, and personal calls “ Mini-John” . It’ll have ailerons, less Anyway, I was Hying up a storm, when will be returned at the disgression of the dihedral, but flying weight will be kept all of a sudden the control stick in my person being called. down to where a modern .15 or mild .19 right hand and the transmitter in my left Business hours on Monday through will be plenty of power. Actually, it flew hand parted company! The stick had Thursday will remain the same: 8 a.m. to so well without ailerons, we’ll probably come out of its socket! I tried watching approximately 5:30 p.m. (you may catch show that option too. the plane while blindly trying to find the a straggler after 5 p.m., but don't count The ship brings back one funny and socket with the stick end. Each time I on it!). exciting memory. I was flying it at one of contacted the socket, I'd move it, and LATE APOLOGY the great DC RC Symposiums in the late the ship would respond. It was all over Wow! What a response to my plea for '60s, with Min-X single channel “ Gallop­ the sky. Finally, in desperation, I took my the loan of a set of Gallopin’ John plans, ing Ghost" equipment. (Once and for eyes off the plane and focused them on as published in the August '65 issue of all, pulse rudder was not Galloping the socket and stick and got things back M.A.N. Letters and plans have been Ghost! G.G. was a pulse system with a together. Luckily, the plane was still in pouring in from all over the place. I’ve wild looking crank linkage on the back the air when I regained control and flew returned all but two sets of plans (which end that made both the rudder and out the remainder of the fuel. (Throttle? the senders didn’t want back) and elevator pulse. Changing the pulse Not with good Galloping Ghost control. answered all letters offering plans if width from 50-50, on or off, to 80-20, It limited the overall control range of the needed. Some of our readers figured 70-30, or what have you, caused the equipment), with a great deal of pres­ we’d be deluged and said, “ Don’t rudder to pulse more on one side of sure on the stick! bother to answer unless you need the neutral than the other, thus propor­ “ WE” VS. “ I” plans.” To all of these, thanks for your tional control ... way back in the ’50s Note that in the above dissertation, kind offer, but please, don’t send plans! and ’60s! Changing the pulse rate made we. . . er. . . I used the first person The other evening I sat down and the elevator pulse more down than up pronoun for the first time since the studied the plans in-depth (while think­ or more up than down . . . fast for down, magazine began, back in 1971. ing about 4-channel conversion) and slow for up. In spite of all the wiggling at It all came about because of com- was shocked at the lack of information. the back end, the aircraft normally flew Con tinued on page 102 6 MODEL BUILDER OVER THE COUNTER

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

• HOT STUFF! The modelers choice... Satellite City has ADDED a spout ap­ plicator to its original tubing and says to the modeling world;

ANY WAY YOU LIKE! A, • ' ·

DISPENSE THREE WAYS! Fir«», of new 1 /8-scale series of yesteryear Unlimited Hydroplanes by Steve Muck. OO NOT REMOVE SAFETY-LOCK INSERT Spouts are now supplied with each con­ modeling supplies for builders of rubber The good news from the people at Sig, tainer of Hot Stuff and Super T in addi­ and C 0 2, indoor and outdoor models, has is, that Sig will have available again, col­ tion to its tubing at NO increase in price. released its new catalog, #1982. One dollar ored Esaki silk! It's available in eight will get you this 16-page catalog, chock full brilliant colors, including Red, Orange, ft.' with SaiadWa Ody of modeling goodies plans, kits, special Royal Blue, Silver, Light Yellow, Dark “HOT STUFF’ balsa, rubber strip, and other needed Yellow, Rose Pink, and of course, White. O: Άναυι ‘ *f$‘v items. A new manufacturing process has enabled TWO YARD BIRDS, a pair of schoolyard colored silk to be produced again. TWO beautiful red, white, and blue, flyers, are a top performing pair of rubber Claude McCullough has been develop­ fuel-proof, self-adhering mylar decals are powered models for the Novice! A free­ ing a smaller version of Sig's famous also included with each 1/2 oz. and wheeling plastic prop, contest rubber, full Kougar, to be called the KOBRA. Designed economy 2-oz containers of Hot Stuff and size plans, satin-smooth balsa, and full size around popular sized .25 engines, it will Super T . Larger versions at 4-3/8 x 1-3/4 plans provide easy building and smooth be available later this winter. inches are also available at no cost. Sim­ flights. With a 12-inch wing-span, 150-foot Also in the works at Sig is a new, two- ply send a self-addressed, stamped envelop high flights are not uncommon. Two for meter glider to be called the RISER. Strong, to; SATELLITE CITY, P.O. Box 836, Simi $4.95, add 10% for postage, California simple to build, it will, undoubtedly Valley, Ca. 93062-0836. residents add 6% tax. Indoor Model Sup­ become the "Kadet" of the glider field. • · * ply, Box 'C , Garberville, Ca. 95440. With lots of room for radio installation, it Indoor Model Supply, purveyors of fine utilizes Sig's popular printed fuselage style

The Yard Bird, from Indoor Model Supply. MRC's Sand Rover, electric powered off-road vehicle.

MARCH 1982 7 Two new options for the Ace R/C Silver Seven transmitter CAR + D lF. AIL/EPA OPTION (left) and CAR + DIF. A lL. AD D-O N (right).

pounds @ 3000 RPM with a total weight of only 8 pounds. Price complete with Quadra engine is $314.50, or $229.50 without Quadra. Add $4.25 shipping for either package. For more information, con­ tact Byron Originals, P.O. Box 279, Ida Grove, Iowa 51445, or call (712) 364-3165. * * * Top Flite Models, Inc., manufacturers and distributors of kits, coverings, and ac­ cessories for the Radio-Control and U- Control model airplane industry, recently announced two executive promotions. Robert T. Nickels has assumed the position of President, and G. Scott Christensen the of construction. Coming soon. Sig P-51's currently out in the field, this well- office of Vice-President for the Chicago Manufacturing Company, Inc., 401 S. engineered reduction unit has proven itself based firm. Front St., Montezuma, Iowa 50171. a dependable method of powering large Nickels, who had been Vice-President • · * scale aircraft. Standard items include; four since 1976, will serve as the chief ad­ Byron Originals has just recently an­ rugged nylon prop blades (including all ministrator for all Top Flite operations. In nounced that it is now offering the com­ hardware for securing props and spinner addition, he will direct all sales and plete P-51 power system separate from its to prop hub), 5-1/2 inch spinner, Quadra marketing programs for new and existing 1/5 scale P-51 kit. This unique four-bladed engine, complete reduction system, ten­ products. power unit, originally offered only with the siometer, muffler, glass-filled nylon moun­ Christensen, Top Flite's Vice-President of deluxe kit, is the only system capable of ting brackets, and all necessary bolts and manufacturing since June, 1980, will effectively swinging a full, 24-inch four- fasteners, one 5/32 and one 9/64 ball assume total coordination and direction of bladed prop. With nearly a thousand driver, and Loctite. Static thrust is 20 the firm's manufacturing facilities. He will

G. Scott Christensen, Top Flite's new Top Flite's President, Robert T. Nickels. The Panapress, by Panavise Products, Inc. Vice President. 8 MODEL BUILDER also continue to provide creative service climbing ability. A roll bar, detailed instru­ the completed project an eye popper on to Top Flite's product development pro­ ment panel, steering wheel, driver figure, any flight line. For more information on the gram. Nickles and Christensen state they and clear windshield add to the realistic extensive line of finishing products from are committed to continuing the com­ appearance. Join the MRC-Tamiya Off- the house of the BLACK BARON, contact pany's growth, while upholding the tradi­ Road Revolution in R/C cars now! See your Coverite, 420 Babylon Road, Horsham, Pa. tion of excellence and dedication to the dealer or contact; Model Rectifier Corpora­ 19044, or call (215) 672-6720. hobby that was established by the late Sid tion, 2500 Woodbridge Ave., Edison, New * * * Axelrod and Mike Schlesinger. Axelrod, Jersey 08817. Astro Flight announces its newest and who created a place for himself in model­ * · · best Ni-Cd battery charger, the "AC/DC ing history by virtue of his inventive and Coverite, the home of the Black Baron, Auto Charger," #4005 AC/DC. This new engineering genius, died in August, 1981. reminds us that, although the Gee Bee charger is claimed to be far superior to all • * * Sportster kit has already been out for one other chargers on the market today. The MRC-Tamiya has added the SAND year, Mr. Henry Haffke, the designer, has unit is rugged and designed for years of ROVER to its line of off-road electric joined the staff of Coverite and the kit is trouble-free use. UL rated at 4-1/2 amps vehicles. The SAND ROVER features semi­ now being produced under his personal continuous duty, the charger has been pneumatic knobby rear tires for the best supervision. The Gee Bee epitomizes the tested for 12 hours continuous charging at handing either on or off the road, plus excitement of Golden Era airplanes of the 4-1/2 amps with no signs of overheating. treaded pneumatic front tires for thirties with its racy lines, but what has The AC/DC Auto Charger features a con­ superlative steering. The rugged ABS pleased modelers the most is the Gee Bee's tinuously adjustable charge current from chassis features coil springs on the front surprisingly stable flying characteristics. It zero to 6 amps, and will reliably charge trailing arms and an FRP stabilizer spring has been called "the tail dragger trainer," any pack with a rating of 100 mah to on the rear axles for full 4-wheel indepen­ because it is ideal for learning how to fly 1800 mah and containing 4, 5, 6, 7, or 8 dent suspension; brass universal joints; and scale planes. The Gee Bee weighs in at 5 cells. A 5-foot long charge cord is supplied tough front and rear bumpers to handle to 6 pounds, has a 56-inch wingspan, and (with alligator clips) for charging in the field those inevitable hard knocks. The speed zips around on a .40 size engine. Cover­ from your 12-volt automobile battery. An of the long-running RS-380 Mabuchi elec­ ing and finishing in traditional scale colors equalizer circuit, with pilot light, trickle tric motor is controlled by a variable are easily accomplished without a paint charges between runs or overnight to resistor speed control featuring forward brush by using Permagloss iron-on cover­ break memory build up. Built-in voltmeter and reverse speeds, plus dynamic braking. ings which are available in the correct Gee jacks allow you safe, positive monitoring Extra parts and a gear set are included for Bee Sportster colors; light blue and new of Ni-Cd battery voltage with any analog the optional RS-540 motor, for greater hill­ cream. The kit's decals, in full color, make Continued on page 81

Byron Originals' P-51 power unit now available separately. Astro Flight's "AC/DC Auto Charger" is latest and most advanced.

MARCH 1982 9 Winners at the D.U.S.T. one-design contest (I to r): Bob Carr 1st, Don Nigg 2nd, Rex Powell (C.D.) 3rd, Peter Neuer (co-sponsor), Mike Armstrong 4th, and J.P. Neuer 5th. Read more about it in the text.

• Humble Pie is a great delicacy, espe­ cially when one serves oneself a nice slice . . . I’m referring to the LOMCEVAK contest in the January issue of MB. Seems that one should have all the facts gathered before preceding onward .. . 3 Γ W O R L D Various aviation sources have identified Text and Photos by JOHN ELLIOT both Jeři Blaha and Ladislav Bezak as having originated the Lomcevak. Also, other definitions of the Lomcevak were quoted, too! Bruce Steingraber submits from an article in the December, 1970 issueof A/r Progress on how the maneuvers is performed; quotes that the word ‘Lom­ cevak' come from a Czechoslovakian idiom that means "Hangover", literally, "A block of wood in the head," or a "Block in the head.” Jim ‘Doc’ Edwards, noted pattern flier, chief judge at many national level contests, and the T.O.C. and, unknown to many, a highly quali­ fied judge of full-scale aerobatics, mentions that ‘Laddie’ (notice the first- name basis relationship) describes it thusly: "It is the motion the top limbs of a tree go through when you attempt to shake the apples off. Every which way, or every way but loose, if you can imagine." Thanks, Doc! (Have you ever been in the top on an apple tree with some one shaking it?) Good friend, Howard Crispin, Jr., in his response, also submitted some inter­ esting info on what sounds like excellent reading for anyone flying and/or judg­ Radio controlled model of the American/Canadian fishing schooner "Blue Nose" is 83 inches ing aerobatics, full-size or R/C. Howard long. Built and photographed by Douglass Henderson. More in text.

Kinda wild biplane glider by Jim Crisman, not legal for competition "Reckon you can put another five pounds of lead in the nose?" (no fair, no fair! wen). Actually, they're draining tail pipe of JP-4 after a no-start.

10 MODEL BUILDER suggests AEROBATICS by Neil Williams (in which five different types of Lom- cevaks are described, the fifth being very similar to my description, and said to have caused several Zlinn’s to lose their props while doing the maneuver. Probably why the maneuver was out­ lawed), very well written and illustrated, published by St. Martins Press, Inc., 175 5th Ave., New York, NY 10010. Price is, or was, $13.95. Many thanks, Howard. Interesting what we can learn about our hobby/sport from a simple contest, it helps us to enjoy it even more . . . Thanks, troops. One last side note, as this is being written (mid-December) the score for Blaha and Bezak is dead even, with several votes for Mira Slovak. Ah, the power of the press! By the way, Frank Sunburned, tired, happy bunch of drivers with their "gold" after Western R/C Off-Road Cham­ Lee, from New Jersey, was firstist .. . pionships in Costa Mesa, California. More information in text. Photo by Jim Duffield. Congrats. ★ ★ ★ From time to time, many clubs be­ come involved in worthwhile projects and someone should blow their horn. Bill Semler, a very active (some would say hyperactive) CD and member of the BIRDS, was involved with the ‘Trans America Rally’ (Easter Seals) in conjunc­ tion with the BIRDS, and the following is excerpted from the BIRDS EYE VIEWS newsletter. "For once, the Sunday flyer member of AMA was allowed to participate in a worthwhile endeavor! To advance the sport of flying R.C... and while doing it, to help raise money for a very worthy cause . . . namely Easter Seals. When the rally was first announced, the Board of Directors gave its blessing on having a team from the BIRDS. TWENTY-TWO people applied for the job, and by the simple expedient of drawing names out of a hat, the team was chosen. Then came the idea of having things donated, and then to sell tickets on the three aircraft to raise money for Easter Seals. In Elevated view of axle-bending track, treated to minimize dust. Layout is only about 100 yards another article, we thank the members from Model Builder's office. Photo by Jim Duffield. of the modeling industry (or making this possible. (K&B for fuel and engines, engines, fuel, props, and above all, the in the Nationals, it gives you some idea Futuba for radios, Zinger for props, pilots. of the scope and appeal this rally had for Robert, Prather Products, jet Hangar "It is too bad, that after deciding at the the general membership. This is another Hobbies, jenesco, Walteria Toy and executive level of the AMA, in favor of case of a decision by the council being Hobby). And to THANK YOU, the mem­ the race, that the house organ for the overridden by management, and the bers of this club, who sold tickets and AMA could not see (it to support its subsequent ignoring of the complete helped raise the money. Our leg o f the own effort. If they had poured on the rally in its own house organ! Manage­ Trans Am was from Phoenix, Arizona, to coal in the AMA magazine, they could ment now says the race was dangerous the Riverside Speedway. W eflew in two, have really wound up with a greater . . . so is Form ula 7. And precision stages, from Phoenix to Blyth (Cali­ donation to Easter Seals, which was the pattern, with its 730 mph guided missiles fornia), to Riverside. Pilots flew from main idea o f the whole thing. When you presents some lovely aspects of danger seats securely fastened to the pickup stop to realize that as many people or also! I had the privilege of being a CD, as truck. You were given an average road more were involved in the Trans Am as well as a Team Manager on the Rally, speed for the day’s flying, from point A to the finish at point B. Then you figured out your fuel stops, your speed and your mandatory stops to get you to your destination at exactly the right lime. You were allowed tw o aircraft, one for backup. Most teams used both aircraft because of failure; either pilots, condi­ tions, or aircraft. The BIRDS team, happy to report, had no penalty points, no repair time, and flew the same aircraft both days, without ever taking the back­ up off the shelf! A tribute to the radios.

MARCH 1982 11 Trailing edge construction method developed by Woody Blanchard from a technique used by Paul Wedeking. Strong and straight!

1. Bond ribs to lower trailing edge. Use Super T or equivalent.

WWW W\ \\\\\\\\\^ \^ I 2. With sanding block, bevel lower trailing edge. Build it along edge of work board!

3. Bond full-span strip of 2-ounce K&B (or equiv.) fiberglass cloth, using regular "H ot Leo Hopper (left), former hobby shop owner, built this Balsa USA 1 /3-scale Sopwith Pup for Stuff" or equivalent. Sand lightly to remove Bill Porter (right). Power is a 3.2 Kawasaki. Photo by Jerry Lafavor. bumps. and granted, there was the element of We have learned that on March 29, safety consideration but to no greater 1982, between 11:00 a.m. and 1:00 p.m. degree than a race; Formula 7 , o r P.S.T. during the nationwide Telethon Quickie 500; or Pattern, or, I believe, no for the Easter Seals fund raising drive, greater danger than a Sunday's fun the BIRDS will present a check for $3000 flying at the average field! The people to the Easter Seals program. 4. Bond upper trailing edge sheet to all con­ involved in the race felt extremely ★ ★ ★ tact area, using "Super-T" or equivalent. disappointed that after giving their time, Where, but in Palm Springs, Cali­ effort, and money to support an AMA fornia, would you find a glider or sponsored function, that the AMA sailplane group that calls themselves magazine could not find the space to "D.U.S.T.” ? Perhaps theclub was formed openly promote, publicize, and make in the summer months when thr winds the Rally the huge fund-raising drive it and dust does blow in the area. In any COULD HAVE BEEN!! The only ones to case. D.U.S.T., or the Desert Union of suffer are the would-be recipients of the Sailplane Thermalists, presented a one- 5. Add cap strips, sheeting, fillers between ribs to stiffen front of trailing edge, etc. and sand funds raised for EASTER SEALS. Per­ of-a-kind contests in early December, edge to thickness desired. sonally, I am proud that our Club ‘one-of-a-kind’ being the sailplane participated. . . and proud of the knowl­ design allowed for entry. and said, “ Why n o t!” The planes had to edge that our favorite sport was allowed Rex Powell, the DUSTY CD, and Peter be ‘box stock’ with only a few minor to help in such a worthwhile community Neuer, of Precision Model Products, mods allowed. Three rounds were flown project, as FLYING FOR EASTER SEALS! and the designer of the “ Challenger” with a toss-out round. Weather was a Bill Semler." two-meter sailplane,concocted the idea perfect 70 to 72 degrees and winds of zero to 3-4 mph roared through with some thermal activity. The contest was conducted on an easy-going, low-key basis, which served several of the con­ testants quite well, this being their first contest ever! A unique and challenging approach to the spot landing area was the use of a ‘gate’ or approach zone that had to be flown through before making for the long, narrow, spot landing area. Helped to minimize the ‘stick the nose in the ground' spot landing (?) concept. Trophies were awarded for the best looking models to Don Nigg, Rex Powell, and Greg Ritter. After the ‘dust’ had settled, the final finishing order was as follows: 1st, Bob Carr, 2nd, Don Nigg, 3rd, Rex Powell (should CD’s be allowed to fly?), 4th, Mike Armstrong, and 5th was j.P. Neuer. Trophies and merchan­ dise were awarded through 12th place . . . After the contest, the word was, ‘‘Let's do it again.” Drop a note to P.M.P., 21489 Cold Springs Rd., Diamond Bar, CA 91765, for the date of the next 'One Design Contest.’ Nope, not a Quadra Twin. Second cylinder acts as m uffler for the running cylinder on this Eastbourne Monoplane, built mostly of cardboard(l) by Art Schmalz, who took photo. Continued on page 104

12 MODEL BUILDER GREAT LAKES 2T-1E one fourth scale By FRANK COMYNS . . . Probably the most famous and well-liked sport biplane of all time, the Great Lakes has been a favorite of modelers since it first appeared in 1929. This is the stock 2T-1E version.

• Mention the Great Lakes around an aircraft could be built. world record of 19“ outside loops” , all in air enthusiast or pilot with gray hair (if The Cleveland aircraft plant was doing a Great Lakes. any) and see his eyes light up. Many of very well financially, when the big The 2T-1E, with the inverted Cirrus them will probably say it was one of their depression of 1929 hit, and as orders engine, was the last production model. favorite planes. dwindled, managed to stay in business The earlier Great Lakes had an upright The Great Lakes was first introduced until 1933, but like many other aircraft Cirrus engine, and was designated a to the public at the Detroit Air Show of companies of the '30s, finally had to 2T-1A. The same cowl was used either 1929, and was an immediate hit. close its doors. way and could, with a little redesigning, The first four planes off the produc­ The Great Lakes has been a collector’s be changed on the model. tion line had straight wings and were classic since the end of World War II, Instruments for the front cockpit were found to be tail heavy. It was impractical and when available, can bring a price 10 an option to the customer. Some had no to move the wings further back, so after times or more than the original 1931 tag instruments at all, some had just enough some serious calculating it was decided of $2,985. Now, after many years, a new for instruction. Few were fully instru­ to sweep the top wing back 9.2 degrees one, powered with an opposed Lycom­ mented front and rear. to bring the center of gravity in line with ing engine, can be purchased today. The quarter-scale model is as much a the center of lift. Ask that old airplane enthusiast if he pleasure to fly. I’m sure, as the real one The swept-back wing and short remembers “ Tex" Rankin. No doubt he must have been. It is very stable in the air coupled fuselage made an average sport will, as “ Tex” was one of the outstand­ and handles nicely on the ground. The plane look like a small pursuit plane of ing fliers of the 1930s, with many light average modeler who can maneuver an that time. Orders came in faster than the plane cross-country records and the advanced trainer would have no diffi-

Frank shows how he safely turns the prop for pull-starting the Not many, but enough! Instrument panel in G.L.T. was sparse but Evra engine, from aside and behind. adequate. Note on-off switch that caused radio problems.

MARCH 1982 13 /if'λ ff naj suta* (4t) f X > a 4 so 1t rty /*/**■ / a r J f & U **éz *%«* VA*J "*> od»*£ /&&*. jůdt J*Jř2/Λ**-π*:y/* * > j e 4 f t c J t » a j b » « f o j t

MODEL BUILDER

16 FULL SIZE PLANS AV AILABLE-SEE PAGE 100 MODEL BUILDER Cooling baffles force air close to engine. Close-up of landing gear, step, flying wire Steerable tail wheel is legal modification. Upright installation used same cowling. attachment, and cooling louvres. Steering arms linked to rudder with springs. culty flying the Great Lakes. always true, I have found that generally engine. A 18x10 or 8 Top Flight prop The ailerons are a bit slow, but ade­ speaking, the whiter colored pine is best works good. quate for sport flying. The real Great for our needs. A 1 x 6-inch piece, 6 feet I would not recommend any motor Lakes must have been similar, as some long will be more than enough for this smaller than the 1.9 cubic inch Evra, as pilots added ailerons to the top wing for model. Spruce should be just as good, this model is made sturdy for the extra aerobatic show work. So adding extra but a little harder to find, depending on vibration and power of a gasoline en­ ailerons to the top wing of the model your geographic location. gine. Finished all up, without fuel, will be authentic. For the upper and lower wing mount weight should be about 19 or 20 pounds. Although most of the wood used can reinforcement, look in the molding An experienced builder could prob­ be purchased in hobby shops, access to a section of the lumber yard for 1/4-inch ably use more balsa and lighter plywood table saw w ill make construction easier lattice. It comes in various widths of and fly it with a belt-drive or .90 size and considerably cheaper. white pine and is handy for building engine. Weight should not be over 15 You will notice that I use a lot of pine large models. pounds in this case. (white pine) for construction. I have The Evra motor is powerful and reli­ Although cooling baffles for the found that white pine works nicely, able, but the transitorized ignition engine are not absolutely necessary they being flexible and with littletendencyto makes it very difficult to start by hand do help to make it run cooler. I used two split. Go to a good lumber yard that cranking. I was disappointed with the lightweight aluminum pieces 2-1/2 handles different kinds of wood and motor at first, but after making the cord inches wide and 3 inches long. Make a pick out a board with straight, close starter, as shown on the plans, that right angle bend a half-inch from one grain on all four sides and light in problem was nicely solved, along with a end on the long side. Drill a hole near weight. Weight can vary considerably safety bonus. Now I can stand to the side the top and bottom. They can be fas­ from board to board. Although not and behind the propeller to start the tened to the front of the 1/4-inch

Close-up of hood latch made from key-ring holder, also another view of louvres.

17 18 FULL SIZE PLANS AV AILABLE-SEE PAGE 100 MODEL BUILDER plywood "A ” former with small screws. The screws are installed through the two large openings in the front cowl. Bend the baffles around the cylinder but keep them at least a 1/2-inch from the engine. If they should touch while running, it could cause radio problems. When I finished my Great Lakes, I ran a wire from the ground tab on the magneto to a switch in the rear cockpit and back to a ground on the motor. This was my engine ignition switch cut off. I almost lost the snip a few times until I discovered this switch rig was inter- ferring with my receiver. So don't make the same mistake. Now I have a homemade choke that runs back to the cockpit. It is a must, and can be used to stop the engine in an emergency. FUSELAGE Start on a piece of particle board or similar material by nailing a straight 1x2 board across the top, over the plans. Cover plans with wax paper. Line the 1x2 with the top of the fuselage frame. Close-up of cord starter, ready to spin prop. A -inch cord with knot in end is just right for the Assemble the two sides, one on top of job. Note fingers are clear of prop blades. the other, against the 1x2. The dotted sections in the lower wing cutout and stabilizer mount are built in and cut out later. To frame up the two sides install the firewall. Use 1/2-inch brads and glue. The brads will make a stronger joint. I have a small hammer for this job, but they can often be pushed in with a nail set or sometimes forced in smoothly with large pliers. Place the fuselage on a table, upside down, with the firewall top over and against the edge, and add the cross bracing. Brad and glue the plywood motor mount to the firewall and assemble the engine section. Now glue and brad the upper and lower wing reinforcement pieces to the inside top and bottom fuselage, then cut out the lower longerons for the bottom wing, also the stabilizer mount. The rest is more or less standard construction, as Engine compartment, showing throttle hookup, tank, and choke. Extra plumbing is for smoke per plans. system. Busy but neat. Continued on page 94

MARCH 1982 19 Not the normal looking model airplane kit The completed Kobe-Kiko Hughes 300 helicopter, assembled by columnist Ray Hostetler. Yes, box, but everything's in there. his dad is Wendell, the giant scale plan man.

CHATTERPHOTOS BY THE AUTHOR By RAY HOSTETLER

• For the next two months I’ll be review­ looking at. It comes in a "semi-knock the O.S. that comes with the helicopter ing a new helicopter that has just been down” configuration, which means that serves very well. If you don't have a released by Orange Coast Hobbies, the major construction is done for you. healthy .50 handy, by all means obtain Westminster, California. You must stick on the tail boom, add the the engine with the kit, it will save you The Hughes 300, manufactured in gas tank, radio, cover the blades, balance from the “ unreliable'' and “ weak’’ lapan by the Kobe-Kiko Co., is the first the head, etc., before you can fly it. powerplant syndrome later on. imported product of this line to enter “ Major construction” includes the main Due to my personal philosophy, I the country. Kobe-Kiko also offers a frames, landing gear, rotor head, and elected to tear the whole ship down and number of other scale/semi-scale heli­ various push rods. start from square one. This was done for copters, some of which may be distri­ At this point I should add that the kit is several reasons. I don't believe in run­ buted by Orange Coast at a later date. So available with or without an engine. ning the engine in a helicopter without a much for the introduction, let’s open Mine included the engine, an O.S. Max thorough break in, and I hate to wipe off the box and examine the product. .50 FSH-R, specifically designed for an aluminum helicopter after a flying This Hughes 300 is a metal framed helicopter operations. It comes session and get all the black residue helicopter by design, with plastic tail fins mounted in place for you, with the from the aluminum chafing on alu­ and a moulded canopy/gas tank, which original engine box and operating minum. The paint makes everything gives it a nice full-bodied appearance. instructions included. The manual states look better, and it is more pleasureable While it is not a true “ scale” ship, there is that either a .45 or a .50 engine may be to clean up after a flight. Plus I wanted no doubt that it is a Hughes 300 you're used. I would recommend a .50size,and to do a detailed inspection of all the little

All of the components, as they come out of the box. A lot of the Arrow points to spacer which Ray recommends beveling, as shown. work has been done. Eight-bladed fan provides cooling for engine.

20 MODEL BUILDER pieces, and look for any weak spots that could become potential problem areas. The easiest way to cover the 300’s major systems is to start at the front and work back. POWERPLANT AND CLUTCH The engine is mounted vertically, pointing down. I believe that vertical is the best way to mount helicopter en­ gines, as the engine torque affects the yaw axis, and can easily be corrected by tail rotor, right along with main rotor torque. (Horizontally mounted engines affect the roll axis in addition to main rotor torque changing the yaw axis.) The engine fan is mounted against the thrust washer, and the clutch is screwed on Exploded view of tail boom and drive system. after the fan. The fan has 8 vanes, each deflected slightly to blow air over the engine. There is no shroud to duct the air over the engine head directly as there is in a Heli-Boy. I have not had any heating problems in average conditions, but there is the possibility of this system being marginally effective in hot and humid weather. A simple shroud could be added with little difficulty, and this would surely help getting the forced air directly over the head. In short, running a "weak” engine and trying to get every last ounce of power from it would not be adviseable here, or anywhere else for that matter. The clutch is of Heli-Boy design; a one-piece assembly that engages by Detail of main rotor head, without fly bar centrifugal force, flexing the shoes installed. against the clutch liner. This system is nice and simple, and quite trouble free. A sprague clutch is an optional extra which will allow you to do autorotations, or have a shot at saving the copter should an engine fail in forward flight. The engine is started by a neat ar­ rangement on the bottom front of the side frames. When the starter is applied, this assembly pushes up to the engine, engages through friction, then falls back down by gravity, disengaging once the engine has started. No more trying to get a long starter shaft aligned a la Heli-Boy. (Schluter has modified this on the SX-81, by the way.) The tank is mounted under the main shaft, so there is no center of gravity Close-up of tail rotor gear box and drive shaft. change with fuel burnoff. However, the tank is low and quite a way from the engine, and muffler pressure is manda­ ro to r speed, 5333 r.p.m . If yo u ’ve tory. Given muffler pressure, the engine followed the past articles we com­ run is fairly constant. Maybe a touch of mented on proper gear ratios, and the leaning from the last of the tank. The 300 turns just where it should. Whoever O.S. must have pretty good fuel draw, designed the gear ratios knew what they View of metal framed construction, showing because I thought that it would be were doing. You can set the ship up with overall mechanical layout of drive train. touch-and-go even with muffler pres­ the supplied pitch gauge, and it will be sure. If you happen to run into fuel draw perfectly happy at that r.p.m. This turns or crash, the "U " portion of the frame is problems it is not too difficult to reposi­ out to be one of the Hughes’ strongest supported, and will not compress or tion the tank higher and closer to the points: We’ll cover this more in Part 2 deform vertically, as it appears that it carburetor. next month. would. The bolt holes on the frame are DRIVE TRAIN The intermediate gears are mounted elongated to allow fore-aft adjustment The engine is geared to the main rotor on the intermediate shaft, with bearings of the entire intermediate assembly, via belt reducing ratios: from engine to on the top and bottom of the gear allowing the proper belt tension to be intermediate gear, 2:1, from inter­ assembly. The shaft itself is "E-ringed" set. mediate gear to main rotor, 4.5:1, and securely in the upper and lower mount­ It is important to set the belt tension from main rotor to tail rotor, 1:4. This ing blocks, which are held to the frame from the intermediate gear to the main gives an engine: main rotor: tail rotor: with two bolts at each position. This shaft first, then adjust the engine shims gear ratios of 9:1:4. Assuming theengine intermediate shaft also gives vertical to tension the belt between the engine turns 12,000 r.p.m., the corresponding rigidity to the "U ” shaped frame. (See and the intermediate gear. Out of the blade speed would be 1333, and tail photos.) In the event of a hard landing Continued on page 74 MARCH 1982 21 Webra .91 with CB spinner backplate. Top Flite 12x8 prop, and An HB .25 with Goldberg spinner backplate. Master Airscrew prop, washer. Not enough shaft remains on which to thread the prop nut. and washer. Again, nothing left for the prop nut.

HOW TO DEAL WITH A...... SHORT SHAFT By ELOY MAREZ . , . Some engines don't have enough prop shaft to accommodate a spinner backplate, a prop, a washer, and still take ail the threads of the prop nut. For safety sake, avoid being short shafted!

• There are some things which I just look around in an attempt to determine threaded portion of the prop shaft is don’t understand: Boolean Algebra, why the unpopularity of their engines? separate from the crankshaft and threads Scotch drinkers, Einstein’s Theory of I can’t believe the makers of these into it. This gives you complete control Relativity, Girls, Ugly Stik Flyers, and short shaft engines make them so in an of the amount of threaded portion that engine manufacturers who put too short attempt to save the miniscule amount of protrudes past the prop blade for what­ a prop shaft on their products. I even material and labor involved, or because ever type of nut or spinner adapter you wrote the importer of one of these the advertised weight of the engine can chose. In addition, there is another engines some time ago, and after some be a silly milli gram less. I can only benefit, though I don’t remember ever exchange of correspondence, he came assume that such decisions are made by seeing it referred to in K&B’s literature. back with the further startling news that someone whose middle name might The removeable part of the prop shaft is the European maker felt that the shaft well be Schneurle, and who might be not heat treated, and therefore not as was too long. the greatest metalurgist in the world, but hard as the crankshaft itself. Therefore, Too long? You put a spinner back who have never actually put a prop on in the event of a nose-first crash, it plate, prop, and washer on the shaft, all an engine which he himself was going to should absorb some of the shock and standard stock items, and there was no fly. will probably bend without any distor­ shaft left on which to even start the n u t! I love the prop shaft arrangement on tion occurring to the shaft. I don’t know Too long? I wonder if these people ever K&B’s .40 series engines, on which the the exact price of either of these replace-

Hobby Products "REAM 'R" described in text. Available in three "REAM 'R" in use, shown here as it enlarges the hole in prop for the sizes, and extremely easy to use in an accurate manner. .91. You must carefully control hole depth.

22 MODEL BUILDER you are in the air, a thrown blade at full throttle will cause a lot of damage to your airplane in just the second or two that it takes you to throttle back or the engine to die of it’s own accord. Incidentally, those RPM and prop-size figures are right out of the Webra catalog, as optimum power revs and

recommended prop for them. ACROSS FLATS Nut for use with a spinner that does not So carving off some of the wood at the require a holding screw. For 1/4 x 28 threads, bore hole with a No. 3 drill bit. hub is not the best possible solution,and we can’t extend the shaft, what then? ment parts, but I am sure that the cost of Well, we have to make a special nut, a one-inch 1/4-20 threaded un-treated that’s what. Nut for spinners using center holding screw. iron rod is no where near that of a Now, there was a time when I would For Webra .91, drill 17/64 hole and tap with a 13 X 1.25mm tap. Other end is drilled to machined, heat-treated and honed not have recommended as a solution to No. 29, tapped with 8-32. Dimensions may crankshaft. It seems like such a good the average modeler’s problem any­ vary for other engines. idea that I don’t see why it wasn’t thing that required special or hard-to- borrowed by some of the other engine obtain materials, or machines, but too makers a long time ago. many things have changed in the past Anyway, like it or not,or understand it few years. One of them is theavailability basic flight instrument . . . unless you or not, there are some short shaft of a number of excellent though rea­ have the right tool. And in this case, the engines around, which definitely pose a sonably priced hobbyist lathes. Even right tool is called a "REAM’R” , which is problem when it comes to sticking that though a professional machinist or tool made by Hobby Products. It is available fan on the front, and more so if that fan is maker might turn up his oil-splattered through normal hobby outlets: by mail to be covered with a spinner in the nose at even the best of them, they are from Ace R/C. This is the only reamer center. (And remember. AM A rules call accurate enough for our purposes. I do that I know of with which it is impos­ (or a spinner or spinner-nut on the front believe we have to be practical. . . most sible to go wrong, no matter how hard of every engine! wen) The easiest and of us modelers don’t require production you try. It is made in three sizes, .276, most often seen cure is simply to whittle type of accuracy and reliability in a tool 5/16, and 3/8 inches. For our purpose, away some of the prop at the hub, and that we use only occasionally. Then too, we need the latter size, I mention the while this works, it does have some most of us who don’t have a lathe or others merely as a matter of information. drawbacks that must be considered. access to one, usually have at least one The ‘‘REAM’R” is a two-piece device; If this thinning of the hub section is friend who does, and who doesn’t mind the 1/4 inch shank is inserted through not done by machine in one of various whacking out a small job like a prop nut the original prop hole, which assures a ways possible, it is extremely doubtful if for us. perpendicular cut by the cutting end of the hub will be of an equal thickness all What it all amounts to is that you will the reamer. A cross piece is inserted around it's perimeter. When placed on bore out the front of the prop hole, through a hole in the non-cutting end, the prop shaft, and especially if the hole about half it’s thickness, and machine a which then becomes a handle by which is even slightly oversize, and secured prop nut that will be long enough and of the reamer is turned. Be careful, it goes with a washer and nut, uneven stresses the proper diameter to mate down into through faster then you would expect. will be placed on the prop which will the recess, at the same time engaging a In the case of the 12-8 prop for the .91, result in enough misalignment to bring sufficient number of threads on the we opted for a 3/8 bore, 5/16 inch deep up another problem which must be prop shaft to insure its safe and proper into the hub, so our ‘‘REAM’R” has a avoided whenever possible, vibration. attachment. The other end of our new mark scribed on its shaft at that point Another even more scary possibility is nut is hex shaped, for obvious reasons, . . .when the mark shows through the that when you thin the hub, naturally and long enough so that the spinner prop, it’s time to quit. We recommend you are removing some of the strength screw that it accepts also has a sufficient that you mark yours also for whatever from the center section of the prop. length of threaded surface to secure depth of cut you design for. Now, I have no way of knowing just how itself. One more point that I feel worth thick a piece of maple has to be to safely The dimensions given are simply mentioning before we get down to withstand my Webra 91 whirling it guides, as other engine, backplate, cutting metal is that while you are around at 13,000 times per, but I am prop, and washer combinations will making or having made this special nut. willing to take Top Flite’s word that at require slightly different dimensions. Continued on page 67 least 11/16 inches are required; which is But you will get the idea, which is to the thickness of it’s 12-8 prop. Maybe provide as much threaded surface as less will do the job, but I don’t care to possible both between the nut and prop find out that it won’t when I am setting shaft and spinner screw as possible. Too the needle, even from behind, which I much is certainly better than too little. have formed the habit of doing. Even if Now, that business of reaming out a the possible failure doesn't occur until prop has always been a pain in the old

Smaller prop nut on two-piece spinner. In­ Inset prop nuts as described in text. The one on left is for spinners not requiring use of a center creased thread area assures safe, secure prop. holding screw. Good new product idea for someone!

MARCH 1982 23 5.G.(SCALE GUY') by r.c. s w o tze ir

after I produced a model that flys very nicely. I was informed by a knowledge­ able engineer that what I had done would not work (at least not very well). That model won or placed in scores of contests over a 10 year period. When I first produced a Wittman D-12 “ Bonzo” many years ago, there were many persons who suggested that I should enlarge the horizontal tail area. Other helpful people provided scientific evidence that because of Reynold’s numbers and this and that, that the darn • I’ve said it before! As the last week of overly concerned about the designing model probably wouldn't even begin to the month approaches I begin casting aspects of producing a model. Certainly fly. One friend looked at the wing, about for some outstanding, earth- in this age of complex technology, we clutched his heart and almost died on shaking item to include in “ One to have the capability of producing the the spot. I had simply drawn the scale One''. Those of you who read this necessary items to very scientifically airfoil from the three-view. I was naive column regularly probably are thinking develop a modeling project. We’ve seen enough to believe (A) that if the real one right now how often such revelations many highly technical articles in recent flew that way, why not the model, and escape me and the article reads just as years which require a considerable (B) the person who did the three-view well upside down. This month's offer­ amount of scientificunderstanding both knew what he was doing and knew the ings came about as a result of three in terms of aeronautical engineering airfoil. The model wing has a 16-3/4 inch phone calls within a two-day period. and math. I personally cannot handle chord, is only 1-1/16 inch thick at its Several fellow modelers called about these articles. More importantly, at this thickest point, and the high point is various and sundry things, however, one stage in my modeling career, I have no about 40 to 45% of the chord. The tail item appeared in each conversation. particular interest in reading them. surface is very small. It flys beautifully. Ron called and expressed some frus­ I’m certain that this represents a The DeHavilland DH-88 with its fan­ tration about his modeling career. As a narrow minded attitude on my part. As a tastically thin pointed wingtips contains relative newcomer to the hobby/sport, teacher, I encourage children to expand airfoils, both in their shape and thick­ he has passed the early “ shakey flying their horizons and to continually learn. ness, that were arrived at by the eyeball stages” but now has reached that point How then, can I personally justify ignor­ school of engineering. While it had where a lack of modeling or aero­ ing self development in important areas handling problems on the ground, it was dynamics background has raised ques­ of design and aerodynamic function? a great flying machine. tions in his mind. Terms such as wash­ Basically I feel I have spent, in the last Please do not misunderstand and out and incidence rear their ugly heads. decade, considerable energy in trying to believe that I am suggesting that we The plotting of airfoils, C.G.. etc., are upgrade my skills in building and flying. throw out all the research and science beyond his expertise in evidence at this Time and energy has precluded expand­ involved in developing model projects. point. ing into other areas. This is a most helpful and productive The second call, from Steve, spoke to I personally would encourage others field that can make our own efforts the problem of scratch building. While to learn only the simplest necessary really worthwhile. What I am suggesting what he was suggesting he wanted to do items to effectively enjoy the hobby/ is that you should not let a lack of (building from a set of commercially sport in the very beginning. There are knowledge in these areas prevent you available plans), is not my definition of fundamental concepts which can be from enjoying the hobby/sport. Cer­ true "scratch building", I know the kept in simple, general terms. Airfoil tainly knowledge is valuable, and I frustrations. There are many new skills types, center of gravity, effects of thrust would encourage you to learn and necessary to achieve the goal. and incidence, etc. are examples to stretch your mind. Don't just say it’s The third call was from Don Allen, a St. consider. hopeless and turn away from projects Louis modeling friend who is not timid Perhaps it’s luck, but let me illustrate you are interested in. about tackling new or challenging some samples which were not ap­ I recall reading some time ago, some­ projects. He also happens to be one proached from a very scientific view­ where, something about that if it looks heck of a good builder and if he ever point. When I sought an airfoil to use for right it will work. In my research for really learns to fly, well ... look out a sport scale Russian fighter a decade the Wittman D-12 “ Bonzo” I discovered (He’ll kill me for that statement!). The ago, I settled on borrowing one from a that Steve Wittman was not exactly an ability to translate the nicities of an successful model I had previously built. aerodynamic expert. He told me basi­ aircraft of the big variety into the beauty The only problem was that it wasn’t long cally what he did was to take the surplus of our size is a skill Don has developed in enough to duplicate the chord on the engine and figure out the smallest a relatively short amount of time. prospective model. I determined the practical airframe possible. The result After talking with Don about his latest necessary chord length, laid the sample was something less than beautiful. There project and his outlook for its success, I down on the paper and drew a new were no wind tunnel tests. When it decided that perhaps there are many airfoil around it (I know that there are didn’t go fast enough with a 21 foot wing modelers out there who are thwarting processes for plotting curves and points, their own modeling future by being but I don’t know how to do it). Later, Continued on page 91 24 MODEL BUILDER 9 %«g

By DICK HANSOIM . . . Doing any maneuver properly, whether in competition or not, requires a "straight" aircraft. Here's how to check yours.

• Every now and then we create a plane design (not a canard), the stab and the model has bad pitch change charac­ which just simply refuses to trim satis­ elevator provide a down force to keep teristics, it’s probably due to a thrust line factorily. Most of us know how to the plane aligned in pitch (up and position which is effectively too low. measure well enough to eliminate obvi­ down). Also, they act like the feathers on CONTROL LINKAGE ous warps, but finding the subtle differ­ an arrow and keep the flight path I believe the hook-up should be as ences can be a problem. The following aligned with the C/L of the fuselage. If "tight as possible” , mainly to keep suggestions may help. one stab provides more force than the vibration from hammering the servo to The first thing to do is list all the other, the resultant drag will cause the pieces. The best set-up is the one with problems you tried to correct; some model to skid or roll slightly, or, if the the lowest mass possible. may be interrelated. The next thing to plane flies in a slightly crabbed attitude, If you are using pushrods, a tapered do is list any corrective trim adjustments the first reaction will be to correct with spruce stick is the best I’ve found (see you have made, such as 1/6-inch left aileron (for roll) or rudder (for skid). sketch). The elevator pushrod should aileron trim, 1/8-inch right rudder trim, Always remember, warped stabs are run directly down the fuselage center etc., etc. Finally, list all the annoying probably the least understood and the for the most predictable results. This is flight characteristics which persist even most elusive of any trim problems. most important for split elevators. The through the trim adjustments seemed FUSELAND AND VERTICAL rudder pushrod should also be extreme­ necessary. STAB/RUDDER ly stiff, with as few wire bends as possi­ I know this sounds like the classic gag, Using a long and perfectly straight ble. I run the pushrod from the exit on “ How to make a million dollars and not scale, draw a large grid on the w ork­ one side to the servo on the opposite pay taxes.” (Answer . . . first, make a bench and center the fuselage on it. side. m illion dollars, and second . . . don't pay Note the intersecting points relative to Aileron hookups should be stiff, with the taxes.) Just bear with me. the fuselage which would indicate a as little wind-up or springiness as possi­ Let’s go through a checklist: curved or distorted portion, especially ble. Separate servos located near the 1. Is the model built according to the aft of the wing. ailerons is a good idea, provided you are designer’s recommendations? If the vertical stab is sunken on one using a radio system which has extreme­ 2. Is the model over design weight side or twisted, remove the rudder and ly well matched servos. specs? (This can change things drama­ cut and insert styrofoam ribs to correct We mentioned earlier that minor tically.) the shape. Remember, equal is more variations in the stab and elevator can 3. Does the model fly at design speed? important than any other factor. cause problems. Here are some exam­ 4. Does the model pass the following ENGINE ALIGNMENT ples. tests? If the airframe is designed correctly, As an experiment, we built a small WING: this is not too critical. . . usually making model with a flat-bottom, no-dihedral 1. Each half the same size and thick­ certain that there is some right and wing. The tail feathers were sorta like an ness (ailerons too). down thrust is sufficient. We use down F-4 Phantom . . . severe anhedral stabil­ 2. Each aileron has the same stiffness. and right thrust on almost everything, izer and a vertical fin on top. The only 3. Each aileron has the same freedom except on extremely light and fast movable control surfaces were the two of movement and travel. designs. stab halves. These were controlled by a 4. Is each aileron aligned in the same The larger the prop and the slower the mixer fed by two servos. As impossible as manner to its wing panel (high-low, design, the more critical this becomes. If Continued on page 70 wavy, etc.)? 5. Does each landing gear fit and align PLAIN WALL the same? LIGHT TILT SLOWLY - WATCH SHADED AREAS 6. Using a non-staining fine marking pen, develop a new center line on leading edge and tips. Cut/heat or 1 reshape until panels are equal . . . don’t fret over slight deviations such as small dents, but make certain thick ness curves are the same. 7. Balance the wing independence of SHADOW SIGHTING l the fuselage. 8. Sight the wing using technique shown, and look for variations. Repeat technique described for wing IMPORTANT: CENTER WING W/ LIGHT SOURCE & CENTER YOUR LINE OF SIGHT . . . the alignments here are more critical W/ THE WING CENTER-VERY SLIGHT VARIATIONS WILL SHOW UP EASILY ONCE than the wing because of the leverage. Example: If the plan is a conventional YOU GET THE HANG OF IT.

MARCH 1982 25 and with the addition ol a couple o f"(. ” clamps, the dyno won't become air­ borne. Photo two is next, and it is the basic key to understanding the torque princi­ ple of the dyno. Obviously there’s a shaft f u e l UNES mounted on two pillow block ball JO E KLAUSE bearings, together with a face-plate/ PHOTOS BY AUTHOR P.O. Bo» 2699 engine-mount on one end. The shaft Laguna Η ,li». C A 92 6 5 3 and mount rotate quite freely and are restrained against engine torque by a load. . . an adjustable-weight pendulum attached to the face plate. This is shown in both the first and third photographs. In the third, you can see the weights (or adjusting the torque load, f urther, this photo is a good one for some comments on engine mounting. As you can see. the beam engine mount is located off- center. Will thisaftect measurements of engine torque? Not in the least. Not only that, but no complex vector computa­ tions are necessary. Simply stated, if the engine crankshaft is parallel to the dyno shaft, then torque readings on the dyno shaft will always be the same for a given engirie/prop load no m,uter where the engine mount is located on the face plate. The sum of the vectors, lor all locations on the plate, is always equal as long as the shafts are parallel. By now, you have a good understand­ ing of the concept of KK's dyno . . engine torque transferred and working 1. The author's dynamometer firmly clamped to a Black and Decker Work Mate stand. Con­ against a pendulum load. Fine, now let's struction is explained in text. measure it. On the other end or the shaft (behind that rather large plate) is a • Hi guvs! l.ist month's column con­ However, since accurate light-reflective pointer. It's shown in the fourth photo tained some general information about tachometers are readily available, (he Tying it all together, an engine will dynomometers. brake horsepower physical capabilities of our dyno need torque against a pendulum load, and (BIIP). and win we might need such only include torque measurement. this will be indicated by the pointer. But things. Also, a promise was lacked on That’s in keeping with KK's (my nick­ how much does it indicate? Again, to about describing, and explaining how a name) philosophy, namely. KISS: Keep keep things simple and avoid constant, dynomometer works, and then doing an It Simple Stupid! That was the goal in the time-consuming calibration of a com­ illustrative engine test. This month, it’ll design of this dynomometer. plex system. KK just marks where the be descriptions. Next lime around, there Torque it is. But what’storque?Torque pointer settles under a given load, reads will bp a walk-through ol an engine test. is work. The only technical difference rpm on a tach.stops the engine, attaches Take a look at the lirst photograph It between it and work is that the latter is an accurate torque meter to the pointer may not impress vou. Actually, it's kind scientifically expressed as inch-ounces, nut. and then measures the torque by of an ugly looking contraption, but. and the term for the former is ounce- rotating the pointer to the mark. The honestly, it is a dynomometer. inches. We all frequently juxtapose (Is fifth photo shows a couple ol accurate As you'll recall, a dynomometer is this the way it's gonna be in 1982. loe> '■ ■ ' ■ » I · meant to measure Bl IP. To do so. it must wen) these words, and I guess that's a provide rpm ami torque measurements. scientific boo-boo. but it really doesn’t Plugging these two figures into the matter. The end result of the informa­ following formula will give us a BHP tion equation is still BHP. reading: OK, how about taking a second look BHP = at that first photograph? The upper part (Torque in ounce-inches) (RPM) is the dyno . . . the lower is a Black and Decker Work Mate. It’s a sturdy base. 1100B400)

3. Adjustable weight pendulum attached to Z Showing basic layout of dynamometer. face plate.

26 MODEL BUILDER 4. Measuring pointer on aft end of dynamometer, with oil dampner 5. A couple of accurate torque gauges (plus or minus 1%). to prevent surging of pointer.

torque gauges. In the next picture (number six) you can see the torque gauge being used to work against the pendulum load until the pointer matches the mark lor that load. As you can see. it's a very simple dyno. but it works very well, and it will provide accurate readings for BHP computation. Now, it that sounds like a declaration of a flat out successful design, let me assure you that it wasn't perfect off the drawing board. Why? Well, because the thing was so sensitive that even 100 rpm variations would cause the pointer to surge back and forth. It usually was only a quarter of an inch or so. bul that meant interpelating where to mark the pointer. To solve this problem, an oil dampner was attached to the rear of the shaft, underneath the pointer. It's that pie­ shaped! container you see in the tourth photo. Inside the container, a paddle hoto seven) moves through oil which Simpens the oscillations without affect­ ing the load. That's all that was needed. A brilliant design? Not really. KK didn't invent a darn thing. A ll that was involved was the application of long- established principles of physics Fur­ ther. theie are many, other excellent dyno designs. Each has its own merits, but they all use the samebasic principles, and they measure BHP either directly, or indirectly by providing figures for mathematical BHP computations. One or two other comments. The platform above the shaft is used for mounting tuned pipes. The reason that such a long shaft and mount is used is to provide the capability of testing the long pipes associated with .90 and larger engines. The one-inch thick aluminum base plate is 10 inches wide and 24 inches long. The shaft is one and a quarter inch steel. The dyno, less the Work Mate stand, weighs 46 pounds. If, by chance, anyone would like more specific construction details or supply- source information, just send me a letter. I’ll be glad to provide any data you ask for, as long as you include a large, stamped, self-addressed envelope. 6. Torque gauge being used to take measure­ 7. Paddle on vertical arm moves through oil Next month: an illustrative engine test ment of work against pendulum load. to dampen sensitive movement of pointer. on thedynomometer. Happy modeling.·

MARCH 1982 27 A whole gaggle of R/C sailplaners at the Fourth Annual Empire State R/C Soaring Classic.

"floaters” were generally replaced by sailplanes capable of greater speed range. Scale ships fascinated those willing to put in that amount of time and effort. Nowadays, the traditional balsa/plywood «c SOARING framework structure is still common, and you don't have to look far to see a fiberglass by Dr. LARRY FOGEL. fuselage and foam core wings. Kevlar and carbon fiber reinforcement is used to cope • What's the future of R/C soaring? What The sixties and seventies gave us digital with lightweight high-strength re­ will happen by when... and, how could this proportional sets with channels for rudder, quirements. (By the way, D.L. Dahm sug­ affect you? Obviously, looking into the elevator, flaps, spoilers, and whatever else gests that Kevlar "fuzz" is easily burned off future is difficult. There's no way to be cer­ you might think of. Two-channel bricks with a hot microflame torch... "like singe­ tain about coming events, and yet there are became common. Here the receiver and ing a plucked chicken." But he warns you trends in the technology that will continue two servos were embedded in a single con­ to be fast and careful.) to affect R/C soaring design, construction, tainer for easy compact installation... Now you can buy AM or FM transmitters and flight performance. Perhaps the good bought at a cost in terms of lay-out flexibil­ that allow individual servo reversal to way to begin is with a glance at the past. ity. The four-wire servo systems were re­ facilitate installation, dual rates by channel, R/C soaring was born in the late thirties placed by three-wire systems that provide change in the range of servo throw and and early forties... a coupling of free flight greater protection against catastrophic even the manner in which they follow the and amateur radio. A few pioneers first failure of a single battery cell. Finally, we stick displacement. You can have linear or proved that it could be done... you really could depend on really reliable non-linear sensitivity of each control stick can carry that much size and weight in a rechargeable digital proportional radio and mix the control signals in the transmit­ model sail-plane. Hey, remember those in­ equipment... except on the frequencies af­ ter to take care of ailerons, V-tail, or elevator verted bottles they called vacuum tubes? fected by the growing misuse of C.B. You as a function of flap or spoiler position. R/C soaring began in earnest when free could even add a thermal sensor to indicate Some transmitters provide a bat- flight gliders were expanded to 100-inch rate of climb by the frequency of the audio tery/transmitted power meter and even in­ span and beyond. modulation radioed down from your corporate an electronic clock to monitor Early in the game, vibrating reeds were sailplane. your accumulated flight time. used to separate the binary control signals. And our hobby grew in the number of The currently available microservos en­ Then you could have a single channel pro­ participants, the diversity of their planes, courage rocket-boost radio control gliders portional control in the form of a pulse rud­ and the events they flew. Larger planes and those of us who simply get their kicks der ... or maybe even "Galloping Ghost,” allow higher altitude, longer duration, cross out of micromechanisms that really work. which was a pulsing of both rudder and country flight. Smaller planes are suitable You can use alkaline cells for long duration elevator from a single channel. Talk about for aerobatics in restricted lift... and there's or perhaps turn to lithium cells for such aerodynamic efficiency? the convenience of that size aircraft. The special single-shot events. You can install

Ron Leon (left) and Bill Slining hold their "militarized" "Murph" Misewicz and his big Schweizer TG-3 military trainer. Spite fuls.

28 MODEL BUILDER Murph's Schweizer TG-3 dives to gain speed over the cliff at Ron Leon's Spiteful in flight. Markings add some realism. T o rre y Pines. solar cells in your wings to recharge your battery while you fly. You can now pur­ chase a no-moving-parts stability augmen­ tation device from Watson Industries, Inc., Eau Claire, Wisconsin. It's about the size of a conventional receiver, weighs less than three ounces, uses less than 1 /8 watt... and costs a bit. You might place a strobe light under your fuselage that pulses at a rate pro­ portional to the rate of climb. This removes the need for a down-link, and helps keep your plane in view while at high altitude. Some trainer planes have been made of expanded bead foam. Soon self-skinning foam will be used as a basis for inexpensive sailplanes made of molded replaceable parts. Here the strength depends on the thickness of the skin, which in turn depends on the temperature of the molding process. The Skyhawk really moves, in flight here at The thicker the skin, the greater the strength T o rre y Pines. and weight. Proper design requires varying the skin thickness over the surface of the pulses that translate into channel and con­ aircraft in proportion to the need. Here's trol surface position. The Westport system John Schwinghamer converted Midwest A-4D a real engineering challenge. In the 1990's, operates in reverse... sending only the ducted fan Skyhawk for slope soaring. certain new materials will become pulse of the carrier that indicates the chan­ may cease when timesharing and encryp­ available, making wings and fuselage an nels and control position by channel. You tion are widely available. Here, you order of magnitude stronger than today's send much greater energy during each transmit your personal code before each graphite fiber designs... and this without pulse and still have the average power command pulse sequence. The decoder in greater weight. within legal limits. The receiver damps out your airborne pack recognizes and accepts A few years ago, Westport International, unwanted signals, and will generally only your commands, even though others Inc., introduced a new mode of radio fre­ disregard transmissions by any conven­ may be transmitting pulses on the same fre­ quency operation to provide clearer signals tional system operating on the same fre­ quency. Your transmitter sends these com­ at the same average power output and a quency. That's surely a big step in the right mand sequences at varying intervals, or protection against interference. You see, direction. even aperiodically, to minimize in­ the conventional set-up operates a con­ The radio spectrum is already too crowd­ terference between r.f. signals sent by the tinuous carrier interrupted to mark the ed, but the cry for additional frequencies Continued on page 83

World Champ Dwight Holley rares back to launch his FAI "Turkey". John Lewis even went so far as to "m ilitarize" his Marks Models W anderer.

MARCH 1982 29 ■ r-=s^■ ^ *teiaiaScL.a isoucU s xoaia· EJZ j hcxu ·*01 hcxu SiftMT WINM »otoec WINM SiftMT «1 txne**il· owe owe txne**il· x

00 o MODEL BUILDER Right front engine section. Blast tubes carry cooling air to oil cooler Pilot's instrument panel. Mark II aircraft protractor and plotting and other engine accessories. Oil and fuel tanks visible. board stowed by pushing forward in support channels. DOUGLAS X02D-1 By NICK KARSTENS

X02D-1 wind tunnel model is 1/6 size with a wingspan of 72 inches. Note early position of wing floats. Model may be seen at the Donald W. Douglas Museum and Library in Santa Monica. Photo by Karstens.

Vought X05U-1 was third competitor, mounted float on central Curtis X03C-1 with land gear. This aircraft won the competition and pylons as used on later Kingfisher series. Note "park bench" ailerons. was produced as the SOC Seagull series.

MARCH 1982 31 the Electronics Corner

By ELOY MAREZ Many-featured servo tester, briefly described in text. Further info available if enough interest exists.

REQUIRED READING dots translate into numbers, as follows: (yellow), 7 (violet), plus three zeros, or • It seems that January was the month to Black—0 Green—5 47,000. reconsider whether or not we are flying the Brown—1 Blue—6 The fourth color band normally seen in­ right mode! In January MB. I gave you the Red—2 Violet—7 dicates tolerance: silver is 10%, while gold benefits of my Mode One flying ex­ Orange—3 Gray—8 is 5%. Lower tolerance resistors (in the 1 % periences and observations, and in the Yellow—4 White—9 range) are usually different shaped, and same month, in Flying Models magazine. If you will notice, the first letters of each have their value and tolerance printed right Bob Aberle. W2QPP tells us we are all color correspond to the Bad Boys, etc., on them in plain numbers, with the excep­ wrong, we should be flying Single Stick. No, rhyme. In practice, the components are tion that "R " is used in place of a decimal he really doesn't put it quite that strongly, marked with three significant colors, which point. "K" is used to indicate 1000, and but he does tell both sides of the Dual Stick indicate the first and second digits, followed "M " indicates 1,000,000. Thus 27R4K vs Single Stick story quite well. Bob is a pro­ by a given numnber of zeros as indicated means 27,400; while a resistor marked 10M lific builder and flyer, who has gained his by the third color. For example, a resistor is one with a value of 10,000,000(10 Meg­ experience where it counts, out in the field, marked with yellow, violet, and orange ohms) ohms. so his opinions have merit. You should read bands would have a value in ohms of 4 Our present frequency tlag system started the article if you haven't already done so. off following that color sequence, with the About Mode One. he says, "It clearly lowest frequency, 72.080 being assigned separates the elevator control from the RESISTOR COLOR CODE White/Brown, second up the ladder 72.240 ailerons." which I pointed out as beingthe being Red/White, etc. However, the later main advantage. introduction of 72.160 (White/Blue) and 73 Bob. de VVIDBN W1DBN/V02, 72.320 (White/Violet) threw the system out W1DBN/AM. DL4LE. KC4USA. ZC4AM, of sequence. At present, our 53 MHz fre­ YS1XEE, HU1P. etc. quency spots are still in step, with 53.1. the WORLD'S BEST SERVO TESTER? TOLERANCE lowest, being assigned Black/Brown, and Well, I think so, since it is my idea! After on up the frequency ladder in .1 MHz MULTIPLIER years of getting by with a servo tester that increments. was adequate but definitely temporary "un­ FIRST & SECOND Incidentally, if you like to be 100% cor­ til I get some time," I finally got it all SIGNIFICANT FIGURES rect, the frequency flag colors indicate band together. The photo shows the results, a Con tinued on page 77 servo tester with variable pulse center and length, measured on it's built-in digital pulse meter. It works for both positive and negative servos, through both metered and un metered outputs; the latter to eliminate the voltage drop caused by the meter and COMMON SWITCH CONFIGURATIONS shunt. It also features a built-in automatic cylcer for time testing and burn-in. has it's own Ni-Cd supply, switchablefrom the nor­ I mal four-cell pack to five and six cells for SINGLE POLE R/C car servo testing. SINGLE THROW SINGLE BREAK Personally, I think something like this is DOUBLE POLE beyond the needs of the average flyer, be­ SINGLE THROW ing more a technician's and tinkerer's in­ strument. Maybe I am wrong, which is why ------< > C Z 1 — I am showing it here; if there is enough in­ SPST terest I'll cover it in greater detail in a future DOUBLE BREAK issue, possibly even a complete construc­ tion article. COLOR CODES Bad Boys Rape Our Young Girls But Violet Gives W illingly... Don't bother to write for Violet's phone a ------number... the above is merely a rhyme DOUBLE POLE SINGLE POLE taught newcomers to electronics to help DOUBLE THROW them remember the component color code DOUBLE THROW as used on resistors, and some capacitor and diode markings. Their color bands, or

32 MODEL BUILDER Two Dumas models of a Coast Guard 41 foot U tility Boat, one 15 Custom Cavalier scaled down to 36-inch wingspan for .020 power, inches long, the other is 31 inches. Gas or electric power. by Midway Model Company. s p o rt scene By LARRY RENGER THE END OF THE TRAIL originally advised, and the blades finding the blades, let me extend the Hero of the People’s Republic of showed up! Joy and Celebration! Hap­ thanks of those who will buy them. And Modeling, namely |im (ones, has finally piness throughout the kingdom of to Jim, who had to do a lot of phoning, ended his quest for decent razor blades! modeling, you can now order good writing and actually putting money on Our fearless tracker of the elusive blades from Jim again! Continued on page 74 Carbon Steel Double Edge, battler with Jim will sell the blades for $7.51/100 or the corporate giant, and general man $14/200. Anyone wanting a free sample about town,successfully glommed onto blade send a SASE to ABS, c/o Jim Jones, a supply of good old-fashioned break­ 36631 Ledgestone Dr., Mt. Clemens, Ml able, super-sharp blades. 48043, USA. Jim says that if anyone )im had been attempting to obtain the orders a batch of blades and is not blades from Gillette, and did, indeed satisfied he will make a full (prorated to receive some lovely samples of just the the returned blades, I suppose) refund ideal blades from them. A follow-up after receipt of the returned blades. batch, however, proved to be the same Also, anyone caught shaving with these great-for-shaving, lousy-for-modeling blades will never receive another ship­ stainless-steel type you can buy in any ment from Jim!!! drug store. It seems that Gillette didn't A few columns ago, I mentioned the realize the importance of carbon steel balsa strippers made by Master Airscrew blades for modeling. and also by Ray Harlan. I neglected to However, in the meantime, Jim had mention that there is also a very nice one sent an order to Wilkinson Sword in made by Jim Jones. In fact, the name ABS South Africa, but that shipment of comes from Adjustable Balsa Stripper. blades seemed to have gotten lost in Jim’s stripper falls in between the other transit, kissing off some significant two, I think, in accuracy and size of balsa number of American dollars. Happily, stripped. however, the order had accidentally Anyhow, to you readers who sent Roger Newbold, engineer in toy division at Mattel, with his TD .051 powered original, been shipped surface mail, not air as helpful suggestions and clues toward using Ace foam wings. Pressure fuel feed.

Interesting pusher-canard seen flying very smoothly at Mile Square Ron Lowe and his TD .051 powered Warlock has flown in night Park. K. Phumirat used Ace foam wings, TD .051, pusher prop. time (!) 1/2A pylon races, using LED's on wings to track models.

MARCH 1982 33 T w e r ø c / e e

m

i m a e

By DAVE THORNBURG . . . How to cut ribs for scratch-built models. Read this and you may be inspired to tackle that Fokker Triplane......

• Wing ribs. Let us be honest about them a joy and a pleasure. For this reason alone, 1 /8-inch plywood firewalls in under two at once: very tew peop/e with I.Q. 's above I always start a new model by cutting out minutes. You can stack-cut thirty wing ribs 6β enjoy making wing ribs. Every model has all of the wing ribs. in a quarter of an hour, including set-up too many of them. They all have to be too On the workbench this evening is a Pond time. Cutting multiple parts is so easy you'll much alike. They're invariably full of little Plan for the Brigadier, a 56 inch old timer be tempted to "kit up" a couple of extras notches, and the little notches invariably free flight. Steve Work just built one for of whatever design you happen to be split out when you're cutting them. three-channel RC. Buzz Averill promised building. Once you learn to use a bandsaw. No wonder people buy kits instead of me the use of an ignition K&B 29 if I’d build But don’t try to learn by cutting wing ribs. scratch building. No wonder most of the a "Brigidier" (that's how it's spelled on the Rib cutting is strictly for experienced magazine plans sold are never built. No plan) and fly it at the Southwestern "sawyers." To bandsaw a stack of ribs with wonder styrofoam models get more Regionals this year. Should I confess that any degree of accuracy the cutting blade popular every year. No wonder everybody I've never run an ignition engine before? must be EXACTLY 90° to the saw table, both builds their fuselage first. Hell n o... just brazen it out, Thornburg. side-to-side and fore-and-aft. The ribs must Wing ribs. Is there anything good to be After all, the plan has a wiring diagram on it. be stacked and held EXACTLY 90° to the said for them? Just this: once you have them And so I begin with the Brigadier's wing table during the cut. behind you. the rest of your model will be ribs. Now as I see it, there are only three If I were planning to bandsaw the ribs for basic ways to make wing ribs: You can cut the Brigadier, I'd grab five pieces of 3/32 x then en masse on a bandsaw or jigsaw; you 1 X 36 balsa, cut 'em into 20 pieces 8 inches can make an aluminum template and cut long, and stack these against the side of a each rib from the template, using a razor perfectly square block of balsa or hardwood blade or knife; or you can make a simple about the size of a Rubikube, which would balsa template and draw around it multi­ serve as a guide while sliding the ribs ple times, forming your own printwood through the saw. Then I'd draw the rib sheets of ribs. Each method has its virtues outline on the top piece in the stack and and its vices, so let's look at them one at have at it. The important thing is to keep a time. the rib stack perfectly vertical during the BANDSAW METHOD cutting. And to keep your fingers out of the The big drawback here is that you must saw. own, or have access to, a good bandsaw If you don't have ready access to a band­ or jigsaw. A surprising number of modelers saw, consider taking your stack of rib blanks own one of these devices. Bandsaws are to a cabinet shop. Arrive with the blanks large, noisy, filthy, loveable machines. stacked neatly and accurately, perhaps Bandsaw method of cutting a stack of ribs all Once you learn to use a bandsaw, you’ll be pinned together with longstraightpins. and at once. Straight wings only! spoiled forever. You can cut out perfect Continued on page 85

Cutting ribs by metal template method. Two varieties of this Roll-your-own method of making printed sheet wood. Cut out described in text. each rib in usual manner.

34 MODEL BUILDER 1. There are certain drawbacks about fencing 2. SAM 30 President Nick Nicholau doubles as C.D. for most SAM 30 meets. Alten, your own private field! Al Staben. SAM 30, Anderson line up, Solenberger tries to scrounge frequency pin. found out the hard way. I Ρίί/S SPARKS

By JOHN POND ' \ In the northern portion of California, hence, their treasury could be easily houses, etc., having fallen by the way- SAM 30 stages an annual meet in the Fall augmented side known as the "Team Challenge" This Each contestant is allowed only one With only one flight required of each has turned out to be extremely popular, flight with a two minute motor run, the contestant, this allows SAM 30 to run a as the head-to-head confrontation so idea being to stay up as long as possible, regular O/T R/C contest in conjunction often found in "hot dog" competition is a la the Texaco event. As it turned out, with the team challenge One cannot say absent In its place is a team effort com­ the motor run (which actually started at he does not get enough flying in for a prised of three members, each attempt­ three minutes) was reduced in two years day. ing to help the other make a good flight to one minute, as the boys and the Incidentally, the field that SAM 30 en­ When the meet was first started, SAM motors were getting too good. joys is a completely fenced in area with 30 did it with the idea that the superiority The last rule was that all models were cultivated grass, parking, barbeque the ignition and four-cycle motors were to be Antique vintage; i.e . designs fa ll­ stand, and in general, a neat place to fly enjoying would be eliminated, and any ing before Dec. 31, 1938. This, of course, But! Anytime you get an enclosed space engine, particularly a glow engine, would eliminate hot models like Play­ someone will always try to do it the hard would be competitive boys, Zippers, etc. Actually, in looking To start with, rules were quite simple. over competition results, for long flights, Each club was to be represented by at the limited engine run types find them­ least one three-man team, with each selves at a disadvantage to the big member contributing ten dollars The soarers About the only thing that beats a idea of the jackpot was that possibly Dallaire Sportster these days is another some of the "poorer" clubs would win; Dallaire Sportster, the Lanzo, and Power­

3. Tom Vincent terrorized the boys with this excellent flying Boehle Giant. Never failed to 4. Speed Hughes hand holds his Morton M-5 place! while it runs. Smooth and reliable.

MARCH 1982 35 C

7. Vernon Grey's Wakefield entry proxy flown by Bert Pond. Bruce Lester photo.

cylinder engine in action, hence. Speed was busy all day running the engine upon request Maybe the Morton wasn't the greatest engine for power, but it's realism, with all the valves working, was simply great In case the reader cannot see. the engine is actually running while being held, attesting to its smooth opera­ tion Photo No 5 shows the columnist with 6. Carl Carlson, of Chicago, with his Wall powered original. Note Pathe or Vitaphone News camera in the background. a scaled Playboy Jr., as developed by Barnett Kernoff, the owner of Tyro way Photo No 1 shows Al Staben In an un­ Contestwise. what can you say when Models, which has produced many suc­ successful attempt to strain his model the competition is so good that if you cessful old timer kits One of the mam through a four-strand barbed wire fence don't "m ax" on the first three flights of reasons for running this shot is to show Al got off real lucky, as only one bad the Limited Engine Events or the Antique what can be done with scaling old timers hole in the leading edge was the result of Event, you are out! Boy, did this column­ (permissable only under R/C regulations). this unfortunate encounter. SAM 30 is ex­ ist get a shock when he maxed five out of tremely fortunate in getting this field for six times and didn't win! SAM 21 Presi­ only $100 a year What a bargain!! dent Jack Alten had even more reason to The columnist simply had to run a pic­ complain, as he made six max flights and ture of Nich Nicholau, the spark plug of failed to place!! SAM 30, as he runs contests, has the meet­ One of the tough competitors who has ings at his place, and in many cases has evolved over the last year is Tom Vin­ built about 50% of the models being cent, seen in Photo No 3 with a Boehle flown by SAM 30 members. Talk about Giant (built by Nicholau. hatch!) Tom dedication to the old timers! flies this huge model like a soaring glider Photo No 2 shows Nick giving direc­ and is truly a threat to win any event he tions to the girls (Miriam Schmidt and enters, whether it be Texaco, Antique, Neva Nicholau, back to camera) on the and even limited engine run! method of registration This photo was It is really a pleasure to watch Tom taken at Brown Valley, a site owned by milk every second he can out of his Speed Hughes, also a serious member of flights, some of them less than 200 feet SAM 30. Jack Allen is shown peeling off high! Needless to say, the Boehle is a his entry fee money superlative glider Interestingly, the caps worn by the var­ Regardless of the hot competition, ious competitors are different colors, some fellows, like Speed Hughes, found which help identify the various SAM time to thoroughly enjoy themselves As Chapter members Right now, SAM 30 can be seen in Photo No. 4, Speed took uses red and white caps, SAM 21 has particular delight in running his Morton blue and white, while SAM 27 is yellow M-5, neatly mounted on a combination and white. Other California clubs are display and run stand Not many model­ gradually picking up on this idea also. ers have actually seen a Morton five-

36 MODEL BUILDER 8. Jerry Persh built this Struck Flying Cloud. Kitted by Berkeley.

This has prompted Jack Alten. Presi­ dent of SAM 21, to restate the original SAM 21 goals in establishing the Provisi­ onal 1/2A Texaco Rules and to further describe the basic Cox. .049 reed valve engine configurations and visible differ­ ences Here is what Jack has to say. S John Pond applies the electric twister to the K&B 19 while Bob Allen helds on to the "When I first heard of the 1/2A Texaco scaled Playboy Jr. Timer Mike Bernhardt watches operation. Event as defined by the Southern Califor­ nia SAM Chapter 49, I thought this would heresy, but how many times have you 2 Tom Vincent (Dallaire) 29:40 be a great way to introduce the new­ had a motor that was a little too big or 3. Ed Solenberger (Anderson) 28:59 comers to our sport. First of all, the event too small for the particular design you 4 Jack Alten (Playboy Jr.) 27:56 should be simple, with no complicated are interested in building? More than 5. Jim Kyncy (Playboy Jr.) 27:51 rules or loopholes that the sharpies' once. I'll bet! could take advantage of. To this end I To top off the fun at this meet, on Satur­ 1/2A TEXACO REVISITED made hundreds of engine runs to check day and Sunday, a hot dog-hamburger At the recent SAM 30 contest, a pro­ various engine combinations and modifi­ type barbeque was offered as lunch for test was registered in the 1/2A Texaco cations. In addition, I tested every com­ the contestant at the paltry price of Event over the use of an engine not mercial glow fuel available and also $1.50. With all the salads, potato chips, readily identif iable as one of the engines every conceivable 'witches brew' I could dips, desserts, etc , you got the best permitted under the rules. As it turned concock for economy. Based on the en­ bargain of the day!! No wonder flying out, the contestant claimed to have as­ gine modifications I could make to im­ stopped promptly at twelve! sembled parts from eligible engines and prove performance and the special fuels Well, we could talk about the meet had been permitted to fly by the Contest that gave amazingly long motor runs, to and its innovations for many pages, but Director. This, of course, did not set too eliminate the foregoing, the rules for let's take a look at the results to see what well with the rest of the contestants. ENGINE REQUIREMENTS in the SAM 27 is winning these days: CLASS AB 1 Don Bekins (Playboy) 20:17 2. John Pond (Playboy) 20:07 3. Loren Schmidt {Dallaire) 4:11* 4. Rich Kultti (Bombshell) 3:42* 5. Al Staben (Dallaire) 3:22* ‘ Crashed

CLASS C 1. Ed Solenberger (Playboy Jr.) 31:40* 2 Jack Alten (Playboy Jr.) 25:03* 3. Don Bekins (Playboy) 24:38* 4. John Pond (Playboy) 21:21* 5. Speed Hughes (Dallaire) 19:00 'Including fly-off time

ANTIQUE 1. Tom Vincent (Dallaire)...... 40:11* 2. Don Bekins (Gas Bird) 3812* 3. Jack Alten (Dallaire) 37:56* 4. Jim Kyncy (Dallaire) 37:10* 5. Loren Schmidt (Yates) 28:40 ‘ Including fly-off time

TEXACO 1 Don Bekins (Gas Bird) 30:00* 2. Don Carll (Dallaire) 30:00* 3. Jim Kyncy (Gas Bird) 30:00* 4. Jack Alten (Dallaire) . . 25:21 5. John Pond (Dallaire) 18:41 *A second flight determined winner

1/2A TEXACO 1 Eut Tileston (Westerner) 30:00

MARCH 1982 37 9. Bob Lane at one of the SAM 21 club meets with a Modelcraft Miss Tiny powered with .049 Black Widow. 1/2A rules is again reiterated. "Any Cox, Baby Bee, Golden Bee. QRC, or Black Widow rear valve .049 cu. in. engine with a stunt tank is eligible. Fuel tank capacity must not exceed 8 c.c. Engine modifications or substitution of non-standard parts that would alter the 10. Cliff Silva, with colorful Corben Ace, is an inspiration for engine performance are not allowed. every handicapped person. Photo by Johnson. Exceptions: Golden Bee: Same engine as the Baby with any of the legal engines. The muffler (1) Moving fuel pickup from middle to Bee but has a 8 c.c. stunt tank. Both tank is round (rotates for throttling) with a grey bottom of tank. and crankcase are gold anodized. Cylin­ rubber ring which is removable for prim­ (2) Addition of mufflers. der also has a single intake bypass. ing. (3) Needle valve extensions for cowled Black Widow: Figure 1 shows this ENGINE PERFORMANCE motors. engine with a different cylinder easily Most U2A Texaco models weigh be­ On the addition of throttles, even identified by two narrow exhaust slits on tween 16 and 20 ounces. A 20 oz. model though we did not specifically prohibit each side of the cylinder. The cylinder with a Black Widow engine and 8x4 Rev- their use, we thought we had written the has two intake bypasses. Tank is an 8 c.c. Up propeller w ill turn 6-7000 rpm and get rules in a simple fashion which would stunt tank. Both tank and cylinder are an inflight motor run of five to six PREVENT their use. First, the Golden Bee black anodized. minutes using K&B 100 Glow Fuel. When was offered in the past with a rotating ex­ QRC: Figure 2 reveals this engine is motor run times exceed these times by haust (not mufflerI) throttle sleeve. This identical to the Black Widow except the any appreciable margin, the following sleeve won't fit the O.D. of any (other) crankcase is silver and the 8 c.c. tank is conditions are present: Cox .049 cylinder without grinding the anodized red. A muffler (non-throttle- 1. The tank is more than 8 c.c. capacity. outside surface of the cylinder. (This is an able) has also been added. The muffler 2. Gasoline or other ingredients have illegal modification in all but the Golden has a black band that rotates to allow been added to the fuel. Bee cylinder). Secondly, the R/C Bee muf­ priming into the exhaust port. 3. Engine was throttled back during fler rotates and throttles the exhaust and R/C Bee: This engine is quite different, flight. WILL FIT any Cox .049 cylinder. as can be seen in Figure 3. The crankcase 4. Someone has figured out a new way ENGINE CONFIGURATION is a silver colored die casting rather than to cheat that we haven't discovered. Baby Bee: This engine came with a 4 c.c. being machined from an extrusion. The CONCLUSIONS non-stunt tank. Both tank and crankcase tank is a 12 c.c. moulded red plastic item This columnist wishes to thank Jack are silver in color. The cylinder (all are and is difference in shape. Neither the Alten for his conscientious efforts in black) has a single intake bypass. tanks or crankcase are interchangeable Continued on page 97

11. Bill Englehart's original So Long with extended wing for Class B. It's been in Bill's hobby shop ever since retirement.

12. George Stephenson, England, says the Reid Hull Stick Winner is best flying kit model ever made.

38 MODEL BUILDER TWIN PUSHER OLD TIMER Model of the Month Designed by: Ralph Kummer Drawn by: Al Patterson Text by: Bill Northrop

• On June 16,1934, this twin pusher was launched on its third flight at a contest in St. Louis, Missouri, and managed to stay within sight of timing officials for 20 minutes, 54 seconds, setting a new N.A.A. record that stood for more than a year. The modeler was Ralph Kummer, and the design was published in the August, 1936 issue of Model Aircraft Builder, one Irwin S. Polk, editor. Inci­ dentally, we have no doubt that this magazine’s name was subconsciously on our mind when we were picking a name for our own magazine, 35 years later. The article about the twin pusher, entitled "Championship Twin Pusher and Contest Hints” , indicated both Ralph W. Kummer and David B. Hecht as authors, so we’re not absolutely sure which one designed the model. Our suspicion is that it’s Kummer’s design, and that David Hecht drew the plans, as his initials are on two of the three plates .. . the way it was originally presented. And the article also makes reference to Ralph, by name, in several instances, suggesting to us that he, Ralph, did not write it. Oh well, if either of them is still around to straighten us out, we’ll be glad to give proper credit in a subsequent issue. The "twin-pusher era” was about coming to its end in 1936, but it domi­ nated contests for quite a few years before "single tractors’’ gradually took over. For those of us who were not active competition modelers in the early '30s, the twin pusher is often looked back upon as sort of an awkward aircraft ... with its "A ’’ frame stick fuselage, tail-first flight attitude, and the thought that winding up two rubber motors at the same time . . . in opposite directions. . . could involve as many as four people! However, those who "were there” , and Continued on page 104

MARCH 1982 FULL SIZE PLANS AV AILABLE-SEE PAGE 100 39 Prather Deep Vee 31 w ith new deck and hatch cover. This particular boat won NAMBA Dist. 8 Offshore and .21 Monoplane Classes for last tw o years. R/C POWER BOATS By JERRY DUNLAP

PUT A WOOD DECK AND COWL ON the performance of the Prather Deep turn me on at all. YOUR FIBERGLASS DEEP VEE? Vee 31. During the last two years, this Removing a deck on a glass boat really The question that needs answering is, boat has won more trophies for me than isn’t all that difficult if you have a tool "Why bother?” Most likely the vast any model I’ve ever raced. like the Dremel hand grinder and a majority of model boaters who purchase However, after racing the boat during circular saw bit. Toassist in removing the fiberglass or epoxyglass deep vees are the 1980 season, I wanted a different deck, run masking tape along the seam not the least bit interested in changing look for 1981. Since the boat had been so line between the deck and hull. This will the appearance of their boats. However, successful, I decided to remodel rather give you a reference line to follow while on the chance that someone might be than build an entirely new type of boat. cutting off the deck. It does help to have interested in doing a little customizing, The reason this boat works as well as it a steady hand when cutting off the deck the following information and accom­ does is because its bottom design is very with the hand grinder. Once the deck is panying photos could be of assistance. effective. Although the deck that comes removed, use a barrel sanding bit in your The deep vee I reworked the deck on on the boat is somewhat scale appear­ grinder to clean the inside of the hull for was my Prather Deep Vee 31. The rea­ ing, it left something to be desired to my about a half inch down the side of the sons for bothering with such a project way of thinking. Such, however, is not hull. To attach the wood deck to the had nothing to do with attempting to the case with the new Prather Deep Vee glass hull, it is necessary to glue a wood improve the performance of this very 65-90.1 really like the looks of that deck. strip along the top of the hull. Spruce fine running boat. In no way can I fault But the deck on the small boat didn’t stringers 1/8 x 1/4 inch can be epoxied

1. The author's Prather Deep Vee 31 with deck removed and the 2. Front deck frames and side deck stringers in position. Note bow wooden sheer strips glued and clamped in place. block for added gluing surface in that area.

3. Tape and clamps hold the 1/16 aircraft plywood deck in place. 4. The completed deck, ready for finishing. Deck is one piece, with engine and radio areas cut away.

40 MODEL BUILDER Hatch cover framework in place on the new wooden deck. Hatch cover framework beside the Prather Deep Vee 31.

Hatch cover completed prior to painting. Completed hatch cover with Mego figures in the driver's cockpit. along the top inside edge of the hull. It tached. I recommend using a one piece satisfactions of taking on a project like will be necessary to use plenty of clamps deck to avoid cracks along seam lines this is the creating of something differ­ to hold the stringers in place against the after the boat has been run. Aircraft ent. As can be seen when viewing the hull while the epoxy sets (note photo grade 1/16 plywood can be used for the hotos taken of the steps in building the # 1). deck sheeting and attached to the deck atch cover, the construction tech­ With the wooden top sheer strips in framework with epoxy glue. As can be niques are very basic. I used the frame­ place, the cross deck frames can be seen in photo #3, lots of clamps and work concept and covered the top with attached. The stringers for the engine/ masking tape are used to keep the deck 1/16 plywood. radio compartment are now glued in sheeting in position while the epoxy The deck and hatch cover were fin ­ place (note photo #2). I brought the sets. Once the glue has cured, the ished using K&B Super Poxy undercoat front deck back halfway on my boat. The plywood can be trimmed along the and Super Poxy paint. Since the entire deck frames have a slight amount of outside of the hull and along the engine Continued on page 93 crown rather than being flat. I personally and radio compartment edges. Photo feel a deck with a slight amount of crown #4 shows the deck trimmed and ready is more pleasing than a flat deck. As can for finishing. be seen in photo #2, there is a piece of The configuration of the hatch cover wood in the bow to provide more gluing can be suited to the taste of the modeler. surface in that area. The hatch cover design I developed is a With the completion of the deck composite of ideas seen on decks of full framing, the sheeting can now be at­ size offshore racing boats. One of the

Roger Newton, NAMBA's R/C Unlimited Dumas U-76 by Kelly Wilson, Andrews, Tex. Won Sport 40 Class at 1981 NAMBA Nationals in National Chairman, has a message for all Amarillo. K&B 7.5, Steve Muck exhaust throttle, drive line, wedge rudder. Octura 1455 prop. model boaters. See text for Roger's request.

MARCH 1982 41 R/C AUTO NEWS By DAN RUTHERFORD

PHOTOS BY AUTHOR Ford C-100 body from MRP has extremely clean lines and w ill mount very low on most 1 /1 2 cars. • Most of the letters I get as a result of this Any chance of doing the same thing with Except to say that none of these articles or column ask a question or two of some an MRP 1/12 car, or how about set up of deals has influenced what goes into the MB kind. But they rarely question me on what a 1/8 car? car column. I am writing about. One of those rare let­ Thanks. However, and that is a big HOWEVER, ters is here on the desk and as it brings a Dale Tester Delta does get its share, and maybe then few interesting points, why don't we get Fellow racer Dale has a bad case of in­ some, of coverage here in these pages. The right into it? complete facts and wild conclusions based reason should be obvious, when a guy sits Dan, on same. Yes, I do the Dekagram, a fac­ down to write, he has to write about I have read your car column since it first tory newsletter from Delta. This typer is for something that he is familiar with or at least appeared in Model Builder and while I hire and the guys at Delta asked me to do is on his mind. With Delta, they are always generally enjoy it, I do have a few questions it for them in exchange for all the cars, sending me the new stuff to play with, as for you. parts, tires and fuel I can eat. If I didn't race that is part of the deal, and besides, I need After reading about a year's worth of your cars they would get a bill for each issue, to take pictures for the Dekagram. This is opinions and view on cars, I had the feel­ or if I preferred to race a different brand in sharp contrast to the situation with ing that possibly you were too slanted of 1/8 car, they would also be billed. To Associated, for instance, where I have to toward Delta products, as they get a lot of really understand the situation, you have call, on my nickel, to find out what is go­ space in your column. I have been reading to realize that I first decided, three years ing on. The easy way out is to save my Gene Husting s Pit Stop column in RCM for or so ago, that the Delta Super J was the nickels and write about whatever is at some time and from that column I had the best 1/8 car for me to race and I was buy­ hand. impression that Delta didn't do a lot in cars, ing my parts, tires and stuff from them, just The JoMac and MRP plants are just down as they have been mentioned only infre­ like any other Delta racer, and have the the road about three miles, so I see both quently. The other day a friend happened invoices to prove it. of them frequently, but even with in- to lend me a copy of a Dekagram and it Delta decided to do a newsletter and person visits they will forget to tell me what listed you as the editor. I think I now Larry Flatt did several issues until running they have that is new or coming soon. It understand, you actually work for Delta!!! out of spare time. Out of the blue, Bill comes down to the fact that no matter This doesn Ί seem like a very good situa­ Campbell called up, made an offer that I what you do, it is absolutely impossible to tion. The other manufacturers are getting accepted on a trial basis, at least at first, satisfy all of the manufacturers involved in a raw deal. and so it has been since. Interestingly selling race cars, something I knew before Another bad situation looks to be com­ enough, another manufacturer also asked writing my first article on RC cars back ing in car racing and that is the purposeful me to do a newsletter for them at about some four or five years. So I have never ramming of other driver's cars. I heard there the same time and they knew that I didn't even tried to get tight with any manufac­ was a lot of that at the World Champion­ even race their cars... or want to. For-hire turer and don't plan to. ship race and now read in RCM where it typers know no loyalty, at least not this As for the column in RCM, you should also happened in 1/12 scale at the '81 one. probably be advised that Gene Husting is ROAR Nationals, robbing Associated of a I have also done instructions for MRP, none other than the boss at Associated. He win. Any comment on that? ghost-written at least a couple of articles and Roger Curtis started Associated / did like your series of columns on basic for Don McKay at JoMac, as well as some together. What current financial ar­ car set up, in which you used an RC12E. other stuff I'm not going to tell you about. rangements there are, I don't know and

For off-roading, the Dodge Heavy Metal step-side pickup is hot Also in 1/10 scale is this Pinto Modified from MRP, probably the and in 1/1 0 scale. nastiest looking off-road body now available.

42 MODEL BUILDER don't care, but Gene pretty much calls the shots at Associated and of course has a deep interest in seeing his company pros­ per. I think you can figure things out from there, if not, a review of a year's worth of c u t« *1 Pit Stop columns ought to make things pretty clear. And I am willing to go on A, record as saying that I do not like the RCM policy of hiring a large advertiser to write for them, but then I don't care for most everything they do anyway, finding the mag one huge bore. The deal about somebody getting ram­ med, I think it was in 6-cell Modified, and, yes, it was an Associated car that got rammed, or at least the last direct hit was scored on an Associated car. It will be an interesting situation to watch develop, as either everybody starts in with team driv­ For open-wheel racing, the new Chapparal from BoLink gets the job done. ing tactics or an agreement will be struck to not do it anymore. What is significant To put a finer point on it, team tactics tionals, and this whole racing-for-money here is that this is not a new thing, it has require a large number of sponsored racers scene, which is what the manufacturers are been going on for several years. What is and Associated commonly has in excess of doing, as Nationals wins sell cars, and new is that this time the designated hitter 20 racers at National events, where the that's a fact. For me, it has resulted in the readily admitted to doing it and freely told other teams are much smaller and Nationals, and who wins what, being one and all why he did it. I have talked to Associated has, over the years, picked up pretty pointless. The racers who are good a number of people who were actually at the nickname of Team Gang-Bang. enough to be sponsored are also good the race and feel very confident in saying If this isn't enough for you, at the '78 enough to win with just about any car, and that Don McKay (partners with John Cong- ROAR Nationals, I was standing at the end most certainly can blow the doors off any don in JoMac and, team leader for its rac­ of the straightaway of the Indoor track dur­ local club racer just out to have some fun ing activities) was not interested in having ing the running of an Expert main event with his toy car. And before I forget, I have one of his racers do a number on and was taking pictures, as well as taping to mention that to pick your race car based somebody else, unless a racer from another the announcer's descriptions of the action. on what wins it has to it's credit is crazy. team, in this case Associated, pulled the Gary Kyes was driving the only MRP car You are buying a race car for yourself, not trigger first. They did. Team JoMac simply in this main, and was also winning, a big an ace, and your needs in a good, solid retaliated. Having been to three ROAR Na­ tip to watch what was happening on the club-racer car are a long ways from those tionals and knowing what has been going track. I was, and towards the end of the of the aces. Spare parts, for instance, are on all the time anyway, I tend to side with race, when it was obvious Kyes wasn't go­ extremely important to you, where the JoMac and their you-hit-me, l-hit-you at­ ing to beat himself with a mistake and that sponsored racer gets the stuff in boxes and titude and would have probably done the nobody could catch him, one of the back- for free. He doesn't need easy, local ac­ same, if placed in McKay's position. markers slowed up on the straight and as cess to parts, the factory is only a phone These "take-'em-out" tactics, as men­ Kyes passed this car on the outside in the call away. tioned, are not new, but in the past have right hand corner at the end of the straight, That is another reason this column tends been much more subtle. For instance, the this other car turned left, right into him. It to deal with things that are more oriented best way to beat another racer in the A was obvious enough to draw boo's, toward club racing; both because I am a Main is to keep him out of the high main although Kyes was lucky and lost only a club racer and nothing more, not near in the first place. So a lot of this bumper- couple of seconds at the most. If I get any good enough to be sponsored even if I car driving has taken place in heat races serious flak about this part of the column, wanted to be (and I don't), and because where it is much less likely to be noticed. I'll tell you who the other driver was and club racing is really where it's happening Even if noticed, the usual excuse of hav­ you might be very surprised... The excuse in car racing. At this level, you can just go ing radio interference, a bent chassis, or was radio interference, by the way, heard Continued on page 72 something equally believable, serves well the mumbled words myself... to get the punch-artist off the hook, Dale's letter really got me going, didn't although certainly not ridding him of it? But I have long had this problem with suspicion. sponsored racers competing at the Na­

The Dirty Halloween Special, somewhat beat after a night of chasing rug-rats. And New Can-Am body from BoLink. The C.A.C. Holbert car is smooth and works on the track. you thought your race car was a pumpkin!

MARCH 1982 43 44 FULL SIZE PLANS AV AILAB LE-SE E PAGE 100 MODEL BUILDER SIMPLE SIMON By FRANK ROALES . . . Here's a quick and easy R/C model for .049-.051 glow or 05 electric power. Ace foam wings make the construction part even simpler. Practice the "biggy" maneuvers economically.

• Line it up for a fast low pass with a big absolutely no bad habits ... a very flat sky before the engine quit, then it set loop. Rack it around and come back with glide, and no tendency what so ever to into a big right glide circle just like a free an in-line axial roll, pull the nose up, snap when really slowed down during flight. After a short chase on motorcycle, climb out, roll it over and split-S out. On landing. In fact, to illustrate this point, we watched it make a perfect landing the way back roll it over and make a low let me tell you of an incident that about a Vi-mile down the airport. Not inverted pass. Crab some altitude and happened during the early testing of even the prop was broken! Later I when the engine quits enjoy a long flat "Simon.” learned that total "free flight” time was glide home. The early version of Simon had a 36 about 12 minutes. So if you want a super­ Fun??? You bet, and that’s not all. This inch straight ACE foam wing with 4 stable trainer type, just substitute a 36 performance and the good manners that inches of dihedral. One day while out inch straight foam wing with 4 inches of go with it comes in a very economical flying, I took just one too many flightson total dihedral for the one shown. All else package. A couple of ounces of fuel, a my 100 ma pack and “ lost it.” The should remain the same. Tee Dee, along with your favorite small elevator was full up and the aileron's Simple Simon has yet another feature radio, and your off and flying. were in a very slight right turn. I set the which may well be better than those It has all the performance one could transmitter on the ground and watched already mentioned, hard as that is to want from just two functions, with Simon loop its way up to a tiny dot in the believe. It is as its name implies, simple.

Get the dirty work over with first; cut out all the parts and make Plywood wing cut-out doublers are clamped in place for gluing yourself a kit. Now the fun starts! by one of a modeler's most handy tools . . . clothespins.

MARCH 1982 45 Squaring up and gluing firewall to top of Square up fuselage sides as you glue them Cyanoacrylate glue makes fast work of the fuselage. to the top of fuselage. assembly. No pinning required.

Chin block is notched out to clear ply doublers and then glued in Bottom sheeting aft of wing opening is applied w ith grain going place. Again, square up sides as you go. across rather than parallel to centerline.

How simple? Well a foam wing and sheet ACE “ Pacer” foam wing kit, or if you sparingly, because it's very heavy. Next, tail together with a fuselage that has no prefer to do it the hard way, a set of ACE epoxy together all wing panels, keeping formers, not even one, make for quick, tapered 1/2A wing cores and a 5-3/4 them straight and even. simple building. Also, the whole thing inch section of straight core. If you have After the wing drys, a groove is cut in can be built with just three sheets of decided to use the ACE Pacer wing kit, the top for a spar. A metal straightedge balsa and a little 1/16 ply, plus a foam just assemble according to the instruc­ can be taped to the top of the wing with wing. Also, as all gluing is with cyano- tions and change the fuselage wing cut­ the front edge approximately 3-3/4 crylate and 5-minute epoxy, the con­ out to fit. If doing it from scratch, start by inches forward of the trailing edge. struction goes very quickly and the same using a square on the trailing edge of the Now, with your soldering gun, make an goes for finishing, because of the exclu­ tapered cores to make cuts of 90 18 inch groove along this, centered on sive use of mylar covering. degrees. This will gain the swept leading the wing center line, 1/4 inch deep for So, if after reading all of this you are edge we are looking for. Next, trim 3/16 the spar. Practice this on some scrap interested, let’s “ have at it.” off the trailing edge of all parts and 1/4 foam and you’ll get the hang of just how WING inch off the leading edge of the center fast to move the gun for the size hole As I hate to build wings, I always get it section. Epoxy the 1/4x1/2x5-3/4 inch you need. It’s not hard, just a bit "dif­ out of the way first. This one is foam and hard balsa leading edge on the center ferent.” The spar can be made by very easy to build. You will need either a section, remember to always use epoxy laminating two 1/16x1/4x18 ply parts, or

m u mm m u ·ττ

Fuselage and tail feathers ready for covering. None on the areas Maybe the name should be "Smooth Simple Simon", as that's the way it flies, smooth and easy. to be glued, please! MODEL BUILDER 46 Notes in the photo tell you what else needs to be trimmed from Metal straight-edge serves as a guide for cutting a spar groove in the stock Ace foam wing parts. bottom of wing. using 1/8x1/4x18 spruce. Your choice. I of the aileron linkage, well up onto the covering from the spot where the small have used both and see no difference. wing. The final step in the making of the horn is to be and place the horn on the Glue the spar into the wing using wing is to cover the whole thing with spot. Micro balloons are then worked “ w hite" glue. your favorite low-temp mylar. But be into the bolt holes on the horn, with Next, epoxy on the 1/4 sq. hard balsa sure to keep it straight and true. If you some left on top to form the head of the trailing edge. Mark the spot for the use the ACE Pacer wing kit, you will have rivet. Drop Hot Stuff on the micro aileron servo and cut this out by cutting to modify the center section trailing balloons to form a rock-like rivet through all the way through the wing just behind edge and ailerons . .. also leave off the the horn to the balsa. A bit of Hot Stuff the spar. Glue the 1/16 ply plate on the tips. around the base of the horn and you are underside of the wing to hold the servo TAIL SURFACES all done. My Simple Simon has over 150 and lightly sand the wing smooth. The tail surfaces are cut from 1/8 balsa flights and a number of dorks on it and Ailerons are made from 1/4x1 trailing as shown on the plans. All edges are this method is still holding up. edge stock cut down to 3/4 inch. Make sanded round except those to be joined, FUSELAGE sure it’s hard balsa and you re-taper it. and the stab-elevator hinge. I used what Start by making yourself a "k it” of the Each aileron is 18-1/2 inches long, but if is referred to as a “ Monokote hinge" on fuselage by cutting out all parts needed you want to save a bit and get by with just Simple Simon and it has worked very according to the plans. Make the fire­ one 36-inch piece of trailing edge, they well, along with being very simple and wall by laminating three pieces of 1/16 could be 18 inches with no ill effects. light. For those of you who haven’t tried ply. Start construction by gluing ply wing Hinge ailerons using a "living" type it, see the diagram on the plans. Also, I saddles to fuselage sides, being sure to hinge. Also, I used Du-Bros 1/2A strip- used a different way of attaching the make one right and one left side. Next aileron linkage and used a strip or two of horn on the elevator. This could be step is to drill the firewall for the ACE mylar wrapped over the epoxied tubes called a "Hot Stuff rivet” . Remove the Con tinued on page 70

Radio installation is also in line with the model's name, simple. Appropriately, the last photo shows the tail end. Elevator horn is Ace Commander. dead center in fuselage opening.

MARCH 1982 47 C I R T C E L E £

PHOTO BY JOHN HICKEY. h KC lb n afed Pennsyl­ Hatfield, in club KRC The • possibly because they have a heavier heavier a have they because possibly the did Kopski Bob that. after well went and air, the into ship 05stunt an threw at Championships Electric annual the gis togwid Hs t fel a Best ookng Model." e d o M g kin o Lo t s e "B was ld rfie rte o P His ind. w strong against account of the KRC second annual Fun annual second KRC the of account fly they because also but loading, wing gas, than wind in better do electrics that 05Jack- his threw he Hatfield; at same all it and done, be could it that I fly. showed to willing was one no first, at and feeling, the know I last mph. 20 Fly over gusts Electric annual its had vania, had a terrific time, and there was quite a wasquite there and time, aterrific had nhw lts e Bb osi ie his give Kopski Bob let let’s Anyhow, is impression personal My ed! the and follow rest well, flew and air, the into rabbit that, like wasyears ago two Square Mile E llis G rum er, P hillipsburg, N .J., holds on to A s tro Super M onterey onterey M Super tro s A to on holds .J., N hillipsburg, P er, rum G llis E Despite persistant high winds, everyone winds, high persistant Despite Fly. better. gusts handle and smoothly more had which wind, the despite September, 48 Charles H am pton, Englew ood, N.J. fle w th is H u m m in g b ird design. design. ird b g in m m u H is th w fle N.J. ood, Englew pton, am H Charles Mauh mot . eod n Most obatc" Fenstermacher. ". tic a b ro e A t s o "M in Second r. to o m abuchi /M C R M h KC lcrc Fly Electric KRC The " By MITCH POLING MITCH By a a was fun day. fun

et efres ee w KC lack- KRC two were performers best of 200 to 300 during the day wasmostly day the applause 300during to 200 drew of landing a and on-field tricky, and and good wind turbulent was the ground through sliced readily These Sczary design-MP). (a The lohn rabbits types. aerobatic and and planes , ld sport fie the There on conditions. electrics the 36 for were flying of bit given out to the general public. general the to out given Thecrowd e! tim every crowd the from the near Wind spectators. the impressed to glider, to scale from ranged Planes wind. the of carsout the in more several tnl codd ih epe getting people with crowded stantly dlr, s hr ws o i ity lic b u p no was there as odelers, m nomto ad ep n lcrc. The electrics. on help and information time for two or three flights. There was There flights. took three or only two and day, for the all time and Clinic ic lin the C aged Fly Electric the were o et o Hiz te lnc a con­ was Clinic the Heinz, for rest no man­ Koerner Heinz Raffle. Fly Electric h to an trcin ofte day the f o attractions main two The " ecrc oee mdl. u, fel PA. , ld tfie a H lub, C C R K models. powered ctric le e A erial view o f meet. Lots o f w in d (note b illo w in g tents) and 36 36 and tents) g in w illo b (note d in w f o Lots meet. f o view erial A Dave B u rt, Indiana, PA, w ith 05 pow ered E lectra F ly and 075 075 and ly F lectra E ered pow 05 ith w PA, Indiana, rt, u B Dave oee Gete ay Ovrl hipoi win . esemacher. Fensterm r. inne w t in o i-p h verall O Lady. entle G powered <

B ob K opski's Jack R abbit, designed b y John John y b designed abbit, R Jack opski's K ob B on a pod. Two lucky people left with all with left people lucky Two apod. on ail., o n /o ff, and p rop stop. W ing s p ill plates plates ill p s ing W oz.,elev., stop. 31 grey, rop p Cox and 6-4 ff, , /o L n X o 5 0 ail., tro s A Szary. and charger to go with it! The Kitty is a nice isa Polk. Kitty The it! Irwin with go to by charger provided itty” "K ARF mpoe promac. esemahr pic. acher Fensterm ance. perform proved im Sport Astro acombination offered raffle looking glider (about 50") with amotor with 50") (about a glider and looking batteries extra in packed Irwin 05 system provided by KRC andan KRC by provided system MODEL BUILDER MODEL

PHOTO BY BRUCE FENSTERMACHER. Ellis Grumeťs Porterfield on approach. Han­ dles well in wind. Astro 15 with belt drive. T-Birdy (modified Soar Birdy), by Bruce Fenstermacher, KRC Treasurer. Astro 075 power. High, low, off motor control. Fenstermacher. Photo by Fenstermacher. the makings to get ready for next year’s Electric Fly! Speaking o f next year .. . plans are already underway, more de­ tails later.’’ Bob also included a detailed sketch of his latest version of the prop stop, which is really ingenious. The ante keeps going up; last time I talked about a prop stop I just bent the shaft on a stock Astro 05. Well, last weekend I bent the shaft on a nice expensive Leisure 05! At $50 a motor, I guess a prop stop gets sort of necessary, to keep the thing horizontal when you land. Either that, or put a Heinz Koerner, who ran Electric Fly Clinic, landing gear on your gliders! Bod has shows prop collection. Complete electric work­ really thought out all the details on his shop on wheels: multiple radio chargers, vol­ prop stop, including dynamic braking, tage booster, cooling fans, metering, etc. an adjustable on-off trigger, and a soft “ The majority of people asked how to spring action for the stop. et started. This included questions on Bob Trockles, originated all-electric contest Heinz Koerner sent some additional its, motors, and installation. Some idea, former KRCer. Soar Birdy, Astro 075, 8-4 nylon prop. Battery is one of six on comments on the fun fly, which were modelers broke their wings by using flight line courtesy of KRC. Good idea! especially interesting since he ran the balsa spars instead of spruce, and some clinic. Here are Heinz’s words. were discouraged after buying some of rpm, weigh the plane, measure the “At nine o’clock, the wind really the cheapy units on the market. Some wing area, and check the voltage and started blowing, and nobody wanted to did not believe the power claims of the charge current, instead of just guessing fly. Bob started flying his Jackrabbit with Astro systems or Leisure systems. Despite what might be wrong. We may have a the Astro 05XL, and it handled very well all this, I think there were a good two-day event next year. We found out in the strong wind. John Hickey's twin 02 number o f future Electric fliers at that that there was just not enough time to Jackrabbit did well too, and Bob’s Ί5 field. I hope they all bring their planes to talk to all the modelers present. We will powered glider. After that, more people the field next year. It is a lot easier to try to organize the Fly Clinic a little bit started to fly. Don Srull tried to fly the locate a problem when we can tach the Con tinued on page 90 Kraft Cardinal with a Leisure 05, but the wind was too much for it. I made one flight with my twin 075 Windrifter, but BOB KOPSKI'S PROP SAVER most of the time it was flying backwards! Later on, against common sense, I took my Quad 020 plane and heaved it into the air... to my surprise, it handled very well in the wind, and was much more solid in the air compared to the other planes. I am w on de rin g if that has something to do with the gyro effect of four motors. It has both rudder and ailerons, which helped a lot in the crosswind landing. "A lot of people showed up at the Fly Clinic. Most of the people who brought planes got their problems straightened out. The problems that came up were: short running times due to under­ charged batteries, undercharged bat­ teries due to use of chargers without ammeters, propeller missmatch, geared prop drive on planes designed for high speed (Estes), and underpowered air­ planes due to manufacturers overstating power output. MARCH 1982 49 "The most efficient engineering solution is always also the most aesthetic." Dean McGinnes and friend with wide variety of models, conducting building demonstra­ tion in Florida shopping mall. Redding photo. • Our lead-in line this month is by "add a whole new dimension to free furniture kits. Aeronautics Professor Eugene Larrabee. flight scale modeling.” Perhaps all of us are wasting our time of MIT. as quoted in the C hristian SUCCESS FORMULA? and energy in trying to defend our Science Monitor. Larrabee is a long-time This bit of home-spun commentary is hobbies. Why not just relax and enjoy? model builder, also well remembered from Georges Chaulet: "Plenty of trim­ Perhaps those who scoff at adults being for his contributions to human-powered ming is the way to get good flights. I’ve interested in "toys” have simply forgot­ aircraft technology. He has most recent­ always heard the proverb, ‘Flights are 10 ten the fun of play? ly designed a special CO 2 engine pro­ percent construction and 90 percent THOSE NEW POSTAGE RATES peller for a British firm, employing trimming.’ Naturally, the layout has to Twenty cents may seem a steep price computer techniques. be somewhat valuable at the beginning. to send an ounce of domestic mail, but ALONG SIMILAR LINES If you try to fly a brick, even with plenty considering the high cost of almost Other quotes relate nicely to Larra- of trimming, it will not take off. "Mos­ everything these days, perhaps it is still bee's thinking, such as these from The quitos and flies seem to have less prob­ quite a bargain. Fulton Hungerford, Philosophy of Style, published way back lems than ostriches getting into the a ir!” maker of those beautiful lightweight during 1852: . .in a mechanical appra- THE TOY STIGMA spoked wheels, figures that it is worth tus, the more simple and the better Plenty of print in model magazines is even an extra cent to publicize vintage arranged its parts, the greater will be the devoted to the “ still playing with toys” aviation, and uses the 21 cent Octave effect produced." And: "Whatever image of our hobby. W ell,at least weare Chanute stamps for his letters. force is absorbed by the machine is not alone. M ilitary miniaturists have As to postage for foreign letters, deducted from the result.” Some things been fighting the“ toy soldiers” label for according to British Airways,seven years never change! centuries. And now, buildersand collec­ ago. fuel costs for a transatlantic flight SPREADING THE WORD tors of miniature furniture are com­ amounted to $14 per passenger. Now it Dean McGinnes.of Lakeland, Florida, bining in their publications about is $170 each! So 40 cents for an air mail is shown in one of our photos helping to aving a “ doll-house” stigma in the eyes letter across the ocean seems rather publicize model building in his area. He of the general public. But unlike model reasonable, doesn’t it? reports that the Central Florida Minia­ aircraft builders, they are not a minority HAPPY BIRTHDAY, “WINGS” ture Aircraft Society is actively promot­ group. In fact, they claim to be second Seems hardly possible that the North­ ing interest in rubber-powered flying only to stamp-collectors in popularity. rop club Flying Wing models contest has scale with both indoor and outdoor Interestingly, some manufacturers been taking place for 15 years. We have events. The club uses the popular Flying long associated with model planes, been privileged to take part in about 14 Aces rules, including the mass-launch including Scientific and X-acto, are of these events, and still eagerly look categories, which according to Dean, deeply involved in producing the tiny Continued on page 68

Two "prime movers" of modeling, Hurst Bowers (left) founder of Magnificent Scottish 1911 Barnwell monoplane by Larry Kruse, Flyline Models, and Don Srull, F/F and R/C scale modeler. Roth pic. C02 power and Fulton Hungerford spoked wheels.

50 MODEL BUILDER Æ HOJ CANA By BOB SWEITZER . . . When you take this far out Peanut to the next flying session, you're sure to get a few double-takes when it's first spotted. Length of the rubber motor alone should make for long flight duration. Also, you'll learn something about sheet balsa forming. • Modelers are continually seeking out The “ Hot Canary W-4” was designed, would be more than just a cute model. It the unusual and different scale subjects built, and flown by Bill Warwick. It was would be large for a peanut scale (15 to build. A quick glance at the cover of completed in 1970, and competed in its inch long fuselage and 66.7 square World's Great Aircraft by Air Progress, first race at Fort Lauderdale air races the inches of wing area), sort of a Walnut revealed a color picture of a little, light same year. Bill and Canary showed their scale in a Peanut shell. You may have to yellow racing biplane with negative baptism of fire (it was his first air race, carry a tape measure to set any non­ stagger wings and square fuselage sides. too) by winning the Sport Biplane believers straight. The “ Hot Canary” was just what I was consolation race. In June 1971 at Cape The model’s size and long nose mo­ looking for. Inside the magazine there May, New Jersey, the torrid twosome ment requires very careful selection of were more color photos and a short won both the preliminary heat race and light, strong balsa. Micro-X Products, article on the subject. More research the main event. The Canary has 14'-9" of Inc. has an excellent offering in 1/64 and into Racing Planes 1971 annual by Reed staggered laminar flow wings that sizzle 1/20 square balsa. They also carry a good Kinert uncovered more photos and the throughout theair at just under170mph. choice of tissue. The cost of their catalog necessary three-views. It was time to During the preliminary layout plans, it is a worth while investment. sharpen the pencils and design a model. became apparent that the Hot Canary The Canary is not advised for begin­ ners because of the construction methods. I will not cover the construc­ tion stick-by-stick, but elaborate in detail on the difficult aspects. The liberal use of molded balsa components, lamin­ ated wing tips, and laminated tail surface outlines may not appeal to many modelers. Don't let the formed balsa parts discourage you, because it is much easier than it looks (this was the first time I tried it). Complete the basic fuselage box frame with all nose formers in place. Begin the molded balsa components with the nose side cheek, as these are simple and easy and will build up your courage to attack the headrest. Select a piece of 3/8 inch sheet balsa and cut to the outline, using the fuselage nose side view (from F3 to F5) as a pattern. Formers F3 and F5 provide the shape to carve the form block. I copied just the curved section of F3 and F5 on each end of the block and carved to shape. I only formed the curved portion of the nose cheeks Here's one model you can build without worrying about it coming out tail heavy! Biggest pro­ because the straight sections will take blem is convincing anyone it's a peanut. Too big to publish full-size plans. care of themselves. . . just allow enough

MARCH 1982 51 night. Now attend to the curvature change portion of the headrest. While still on the mold, cut narrow V-notches (one on top along the center line and one on each side about half way down) back from F10 approximately a 1/2 inch to the point where the compound bend starts. Pull and trim the sheet balsa until it fits the form at F10. Clue balsa slits together on the mold block with Wil- hold aliphatic resin and sand lightly when dry. When dry, remove from block, add former F10, and trim to fit fuselage. A coat of clear dope inside the headrest will help hold its shape. Now you have one nice light headrest. The laminated wing tips and laminated tail surface outlines are not that difficult. Walt Mooney has written much on laminated tips, so I would be just wasting your reading time by repeating it all again. The Peanut Professor uses hard w ood fo r his o u tlin e s, w here I use extra balsa sheet. Don’t forget to make a tern’s size and shape. Soak the blank for 1/20x1/64 balsa, but the principle is the right hand and left hand form. Cut a 45 minutes in hot water and test bend it same. The remainder of the construc­ piece of 1/64 sheet balsa, with a good slowly around the balsa form. Look for tion is straightforward and should pre­ straight grain, approximately a 1/4 inch cracking or splitting. If it doesn’t want to sent very few problems. larger than the curved block. Soak the form, use some household ammonia on Cover the model with light yellow sheet for about 45 minutes in hot water, it. That stuff will make the most stubborn tissue (Canary yellow), with blue and and wrap around the mold. Pin only at balsa curl around any block. black tissue as trim. When I covered the the edges and let dry over night. When Once on the form (you will still have molded balsa components with tissue, I was surprised to see that the sides had dry, fit and trim the formed sheet balsa the compound section near F10 to not become indented. The form balsa to the nose former and glue in place. contend with), clamp the sheet at the You can avoid all the difficulty of the bottom of the block and let dry over­ Continued on page 67 nose cheeks by going to carved balsa blocks (hollowed out) and om itting nose formed balsa, but you may have a nose- heavy problem. Having completed the nose cheeks (courage in hand) it is time to attack the headrest with the compound shape. Carve a balsa block to the shape desired (about 1/64 undersize for the allowance of the sheet balsa). Use F10 for contour shape at the end and blend the other end into the fin. The block should be finished with two coats of sanding sealer and one coat of car wax (I use Record Time by Blue Coral) then buff. Pick a nice piece of straight-grain 1/64 sheet balsa and cut a piece about 3/8 inch larger than is required (you may need plenty of extra for clamping). I use a piece of paper to determine the pat­

52 MODEL BUILDER BLACK >" PECK-POLYMER STRIPE PROPELLER 1/4" UPPER & LOWER WNGS

TILT RIBS FOR BALSA STRUTS >DIHEDRAL ;e e STAB OUTLINE

•1/20“ SO — BALSA

STABILIZER

4 LAMS 1/64" X V20" BALSA' OUTLINE COLOR SCHEME ALL YELLOW EXCEPT 025 DIA LANDING AS NOTED GEAR WIRE FRONT VIEW b l a c k - BLACK G WALK. MOLDED SHEET 1/64! BALSA OR CARVED 1/16“ DIA ALUM BALSA BLOCK THEN TUBING HOLLOWED O U T ------

BALSA- SPINNER

REMOVABLE NOSE BLOCK-USE PECK BLACK WITH WHITE POLYMER BEARING OUTLINE FOR 1/32" DIA PROP SHAFT (NO PA-1) \ WING- STRUT - T ~ \ 1/20" SO BALSA 2 REO'D -1/20" SHT BALSA /SPARS

I ___ Γ” \ W3 W3 \ W3 W3 Γ W4

SEE STAB OUTLNE AILERON*' LOWER WING OUTLINE 2 - 1/20" SHT BALSA TOP V EW 16-1/32" SHT BALSA

2-1/32"SHT BALSA ***=5 5 ^ - SEE STAB 1/64" MOLDED MOLDED CANOPY- ^ OUTLINE NOTE. SHEET BALSA ALL ' FORMERS 1/20" SHT BALSA UNLESS OTHER- \ WISE SPECIFIED. Λ

PLYWOOD

-1/20" SHT •1/20"X1/16‘ BALSA KBALSA GUSSETS

BLACK WITH WHITE BALANCE RACING PLANES VOL VII 1971 ANNUAL POINT OUTLINE BY KINERT AIR PROGRESS SIDE VIEW WORLDS GREAT AIRCRAFT (1972) DESIGNED AND DRAWN BY ROBERT C SWEITZER

: F.6 - lčc. F 5 F8 F 9 BILL WARWICK'S W -4 MODEL BUILDER u i *M i m u c M. m.. ca t x n magazine PEANUT SCALE ( ~ f° r c a n o p y Plan No: 3823

MARCH 1982 FULL SIZE PLANS AV AILABLE-SEE PAGE 100 53 Mike Strieter (left) and Phil Cartier getting ready to send Gary Frost into action (using Gary Arnold, Michigan, uses Super Tigre 15, very little wood, in his FAI Combat models. Phil's model and engine).

* 4- By DIRTY DAN” RUTHERFORD ontrol line PHOTOS BY CHARLIE JOHNSON

• Covering a new model has always been boom and motor pod. Even though this it would be no problem. As usual, I wanted tun. The thing is finally almost finished, is story doesn’t have an end (yet), I did find it done right then, so did the models by often your best model yet, so you're proud a small company that had a shrink-wrap hand and never went back. Still, it was an of it, even when semi-naked and there is type of machine that would accept objects interesting idea, and if anybody out there always that new color combination to try up to four feet long and two feet wide. The has any experiences with such a scheme, out. Yes, one new model at a time, cover­ plastic they had available varied a lot in there are a lot of us who would like to hear ing is enjoyable. It's when you have just strength, from the not-acceptable film used about it. finished off a stack of Combat models that to cover plastic model kit boxes to some Back a few days when something covering can become much less enjoyable. stuff that was really tough, but a little reminded of the search for a covering With that in mind I once tried to locate heavy. machine, I got to thinking about plastic film a company that had a machine that could As I recall, the reason I ended up not try­ finishes and why they always seem to be cover almost-complete wings for Combat ing them was that they didn't want to heavier than necessary. One of the reasons models, in this case I was dealing with change materials for such a small job, has to be that, while adhesive is only wings that needed only installation of tail- although if I caught them at the right time needed where the covering contacts struc­ ture, the film has adhesive on every square inch. For obvious reasons, of course, but that stuff just goes along for the ride and doesn't contribute anything at all. What would be interesting to try is applying the adhesive to the structure and then ironing on a nice, light uncoated film, mylar probably. Yes, I know that idea isn't new, I first heard about it when reading of the Hunter’s FF Satellites, and Rich Lopez has used a similar technique on Combat models, but I think they used 3M contact cement which would seem to be a little heavier, and a lot messier, than necessary. So again the question; isn't there a cheap, widely available, easy to apply glue around that can be used to attach a light, strong plastic film to model structures? News From the Hunters . . . Bill sent along a very thin envelope the other day, leading to speculation that maybe they had discovered a dehydrated Time out! Max Mearns needs help, referee Paul Curtis about to step in at Team Trials. glue, but instead it contained stickies and some of the usual PR stuff. First, they are 54 MODEL BUILDER George Cleveland (left) and Gary Arnold have at during elims. Note George Cleveland checks out progress of a match. No sense in similarity of expressions. Looks like two-part harmony. wasting fuel starting the spare at $25 a gallon. packaging Hot Stuff and Super T with yet even things up a little. How many times some of the things that have to be done another variation on the this-is-my-handle, have you seen that happen?! If a Sport­ before making the first flight of the year, this-is-my-spout theme, adding a new smanship award is initiated for NWSR, and as these things absolutely can't be put off, spout-type applicator, which means that if Dick can keep from unretiring the motor and are much more easily accomplished now you have your choice of three dif­ the first time he loses, he gets my vote. in the shop instead of at the flying field. ferent ways to dispense the glue that made Gettin' Ready to Fly . . . Being a motor freak, I like to start with Satellite City famous and the Hunter's rich. A few months ago, I gave thought to the noisemakers and try to do a pretty The spout looks like it will work okay when doing an article on what to do with your thorough job here, ’cause if the motor needing to apply mass amounts of the glue, CL equipment as it was put away for the don't honk, flying is no fun at all. If the as in attaching glass cloth, otherwise you'll winter. Then I remembered that nobody motor in question was running strong the probably prefer the old way of doing things actually does all that stuff like rinsing raw last time out, there is no reason to com­ for most jobs. fuel out of the motor, wiping off lines pletely take it apart and several good The stickies are also included in each before storage, taking the starting battery reasons not to. Just pull the plug out and package of Hot Stuff. Notice that one has out of the pit box and putting it on charge, put it in the practice-flying box. For a look the world to the left while the other has cleaning out the toolboxes and so on. No at the internals, pull the back door and the world to the right. If you're far-left or mistake, an evening spent cleaning check for rust on the rear bearing. If you far-right, they've got something for you; everything up before storage is time well find any, it is best to replace the bearing, middle-of-the-roaders need not apply. And spent, it just never gets done. as we run these bearings at the ragged if you're really crazy about your Hot Stuff, So it seemed a good idea to write about Continued on page 88 they also have larger stickies available, just send 'em a stamped, self-addressed envelope. While you're at it, ask for the sheets detailing building tips. Personal Note: Thanks for the Hot Stuff stickies, Bill, but my kid used up the very few you sent. Please send more, enough to supply him and his friends, so there will be some left over for me to use in patching wings and hiding bits of hangar rash on the models. Also could use a few in a slightly larger size, 50 by 12 inches would be about right, then I could cover a Combat wing with just two stickies. Thanks. Typical ...... of the attitude that it takes in making an event like Northwest Sport Race work as originally envisioned was that taken by the '81 NWSR champion, Dick Salter. Last year, Dick had a Fox .35 (the only engine now allowed in this racing event) that really smoked. Well, for a very old design, originally meant for Stunt use only, it smoked. Everything is relative, you know. Anyway, Dick took this motor and retired it before the start of the '82 season, just to

MARCH 1982 55 t9/2 BLACKBURN MONOPIANC

By SID Ml LLER . .. This model was designed and flown as a free flight, but if you're an R/Cer who is willing to do a little modifying, the plans provide a nice basis for producing a lightweight 3-channel scale ship.

• Those aviation enthusiasts who were which along with the photos of the real lucky enough to visit the last open day of aeroplane, should facilitate scale con­ the season at Old Warden Airfield (Eng­ struction and details land). would have witnessed the rare The construction of the airframe is sight of a genuine 1912 aeroplane in its fairly typical of the period The fuselage natural element is made from three ash longerons, with Piloted by Neil Williams, the Shuttle- spruce spacers, the rear turtledeck is worth Trust's (Museum) Blackburn Mon­ faired to a semi-circular section by 11 oplane gave a spirited performance de­ stringers Thin aluminum sheet extends spite its vintage years and there were few to the rear of the cockpit, and this has a spectators left uninspired by the occa­ dull finish The wings have no ailerons sion but are warped', and contain two spindled Robert Blackburn, the designer, was ash spars, with built-up cottonwood ribs born in 1885 and was a qualified civil The tail assembly has single surface engineer He became interested in avaia- covering and both movable and fixed tion at the time of Wilbur Wright's visit surfaces are attached to separate 1-inch to France in 1908 diameter spars of steel tube The under­ The 1912 Monoplane was the third in a carriage (landing-gear), clean for its series of designs which extended into a period, is made of ash, streamlined be­ long and fruitful career by Blackburn, of tween joints, with two spreader bars of building aeroplanes for the Royal Navy steel tube The following is a description of the The pilot has two basic instruments at Author/designer Sid Miller w ith his 1912 construction of the real aeroplane. his disposal, a large revolution counter Blackburn Monoplane.

Close-up of cockpit in Shuttleworth (England) Museum Blackburn. Cockpit of model closely resembles real cockpit at left. All museum Instrum e ntatio n to ta lle d one tach om e ter and tw o o il p u lsa tor glasses. photos by Bob Meuser.

56 MODEL BUILDER (tachometer) mounted at the left, and a ailerons At the time the Blackburn was formers, stringers, motor mount, and couple of oil pulsulator glasses. The fly­ built, ailerons were virtually unknown cowling Cut the cowling and mount to ing controls consist of a fairly standard Standard lifting (flying) and landing suit engine used From experience, two rudder bar and a long 'joystick' on which wires brace the front spars. degrees right thrust and three degrees is mounted a 12-inch diameter steering The real aircraft is covered in the nor­ down thrust is desirable wheel' This wheel warps the trailing mal off-white linen, which darkens with The kingpost is a vital part of the con­ edge of both wings by pulling on two age struction of this type of model, since the cables which run from the fuselage sides The model, although primarily design­ landing wires (top) and flying wires down to pulleys attached to the rear legs ed for free flight, is easily adaptable for (bottom) actually support the wings It is of the undercarriage Each cable at this radio control The large wing area, deep a laminate of 1/32 plywood (1/16 for RC), point divides into three, which run to the undercamber, and adequare tail sur­ between two pieces of hard 1/8 balsa rear spars Corresponding cables from faces, should handle a larger motor (10 the top surface of the spars run up and to 15 c i.) and the extra weight of radio over the ash kingpost and perform the gear, with ease I would like to offer two duty of the balance cable on modern suggestions along those lines; use of wire and tube wing mounting (as per RC sail­ planes), and cables for servo to rudder and elevator hook ups CONSTRUCTION WINGS Use pattern on plan to make templates for ribs W-1 and W-2 Cut and sand ribs as per number on plan Make a thick cardboard template of the wing tip shape Soak strips of 1/32 x 1/8 balsa, bass, or spruce, and laminate four thick­ nesses around template Notch trailing edge to receive ribs Pin leading and trailing edges over plan and glue ribs in place Slide 1/4 x 1/8 spars (spruce recom­ mended for RC) under ribs, carefully raise and glue in slots. Use scrap to block up spars, to allow for undercamber FUSELAGE The basic crutch of 3/16 x 1/8 balsa is built directly over the plan top view and using the 'V' formers F-1, F-4, F-6, F-12, F-16, and 1/8 square spacers, add the To keep weight down, Sid built his wheels bottom longeron Remove the crutch A detailer's dream, this photo reveals a myriad of ply and balsa from the board when dry and add upper of wires, cooling fins, etc.

Here again, we can compare the real airplane with the model. What appears to be wide tail structure is really the reinforcing pinked tape over very thin structural members.

MARCH 1982 57

Wing flying and landing wires on model are functional. Original Close-up of engine installation on model, also cowl riviting. Original aircraft used wing warping instead of ailerons. model used .06 diesel. (spruce for RC) and securely glued in place Note that it goes all the way to the bottom of the fuselage and is also glued to former F-5. Sheet forward part of fuselage as shown, later cut out cockpit opening and use split black rubber tub­ ing to make cockpit coaming Add sternpost and skid Fin can be glued on now or later after covering If added later, be sure and remove paper along stringer where fin fits, for a good glue joint Separate rudder is later hing­ ed to the fin. TAIL ASSEMBLY Build both halves flat on plans; for free flight, elevators can be left as in­ dividual sections, joined to stabilizer halves by aluminum hinges, and for R.C., elevators should be joined by a dowel LANDING GEAR Assemble as shown in full size on plan. Wrap with soft wire and solder all joints Fair in with balsa and bamboo as indicated; spruce can be substituted and Another view of tail structure and sprung skid. Tail is well braced w ith wires. Triangular fuselage is desirable for R C. shape shown clearly from this angle. The wheels can be constructed as plywood tongues and then, with the tail sion is important to provide a rigid and shown on the plan or Williams Bros 3-1/4 blocked up to set the fuselage centerline secure system, as the wing is supported inch Vintage Type will do nicely Assem­ parallel to the working surface, block up by this series of flying and landing wires. ble wheels on axle and secure axle in the wing to 10 inches from the leading There are seven (7) lower braided lines place with white, round, elastic thread edge of the tip rib to the working sur­ on each wing panel; three from front of available in sewing section of local face. Rig flying wires (lower) of 30 lb. test the landing hear lower surface to front stores it is also used on tailskid black nylon fishing line, pulled tight, spar wire attachment hooks; three from and acts as a shock absorber The land­ secured, and trimmed The landing wires the rear landing gear attachment point ing gear is spread at the open ends to fit (upper) are constructed of Proctor flying to the rear spar The seventh goes from into the brass tubing mounts, and cross wire, swages, and turnbuckles. The wires the rear landing gear point to the front braces fit into the wire eyelets. are fitted and then pulled taught using spar outermost hook It is important that RIGGING the turnbuckles. The turnbuckles are there be no upward give in the wings The wings should be fitted on the then secured with safety wires. This ten­ Continued on page 69

Close-up of landing gear on original and model shows that Sid may have added a few less wires, but the character of the design is very close.

60 MODEL BUILDER MARCH 1982 61 Don Ross, returning to models after 20-year Bob White launches winning Coupe d'Hiver Bobby Dunham launches class A/B model layoff, with his Upshot Mulvihill. flight at 1981 Nats. (based on FAI design) at 1981 Nats.

by TOM HUTCHINSON PHOTOS BY AUTHOR

• You may recall that, a few months back, Oregon Society of Professional Engineers, Preparation started by having last year's in introducing the Fourmost Miter Mate, I we decided to adopt the same specifica­ state winner, John Cooney, speak toall my mentioned our annual Hillsboro High tions as would be used at the State contest. physics classes and pass on his tips for School Model Bridge Smashoff. Well, we've Briefly, the bridges were to be 16 inches building better bridges. These boiled down just finished this year's event, and I think long, no higher than 3 inches, and weigh to: pick a good, simple design, select your you might be interested in the results. no more than 30 grams. They were to be wood carefully, and make good, strong glue This was the 8th annual Smashoff, and constructed entirely of balsa wood, glue (no joints (Sounds like hecould be talking about each year the rules have differed slightly. restriction on type) and cotton string. Final winning model airplane contests, doesn't Since we were the defending state cham­ placing would be based on the ratio of it?). John had decided not to enter the local pions in the contest sponsored by the breaking load to bridge mass. smashoff, but to try to inspire some en-

Julie Lavell watches anxiously as her bridge is Test setup for Hillsboro Bridge "Smashoff". Bridge weighing 30 grams gets set to be loaded to tested. Placed 5th with a load of 245 lbs! destruction. Hillsboro Argus photo by Michal Thompson. Photo by Michal Thompson.

62 MODEL BUILDER thusiasm for winning the state contest again this spring. The first hint that things were going to be different this year came in the qualification trials for the final smashoff. Last year, the qualifying standard of 1000 times the weight of the bridge was met by only 35 bridges . . . this year we had about 120! (This in­ cluded entries from both Hillsboro high schools). When the finals were over, it was evident that standards in bridge building had risen . . . last year's 3rd place winner (which also placed 3rd in the state contest) would have placed 31 st! Only 6 bridges had a strength-to-weight ratio greater than 2000 to 1 last year; this time there were 60! The winner this year was a junior-high student, 13 year old Adam Cooney, John's younger brother, with a strength/weight ratio of nearly 5000 to one (breaking load of 305 lbs.). He used John's design (as did all of the high-placing bridges), a double frame of two simple triangular trusses with a hefty cross-section on top (to take the compression load, as balsa is only 1/2 as strong in compression as in tension), and a thin tension member on the bottom. A few cross-members served to join the two side frames. The smashoff had a noticeable effect on the shelves of local hobby shops. One beneficial effect was that they were nearly cleaned out of all the super-hard, heavy balsa that's always the only thing in stock when you're looking for 4 lb. C-grain stuff (hard balsa has a higher strength/weight ratio than light balsa). There was also a run on Super Jet, which John had recommend­ MARCH MYSTERY MODEL ed (in order to build and test different staff for making the prints that accompany ing, the 3-D zig-zag turbulator is carved in­ designs the same night), so that the local this column). to the upper leading edge. The wing is hobby shop had to buy out the wholesaler's MODEL OF THE MONTH, Espada operating at Reynolds numbers between stock. (As a sidelight, Kevin Eglehoff made F1B—R. Hofsass/L. Doring 20,000 and 35,000, therefore this turbulator an unofficial entry by repairing last year's This month's three-view of the 1981 is absolutely essential, the wing is in three 2nd place state winner with Super Jet. At Wakefield winner comes from Free Flight parts, the tips being attached with 2 mm the state contest, it broke under a 297 lb. News; the following commentary is taken aluminum joiners and the two center panels load; in its repaired state, it broke at 295 lb.) from the Australian magazine Airborne, via being permanently glued together. The evolution of this contest over the past Paul lagan's FF column. Here are Wakefield "The conventionally built tailplane is years had paralleled that of any other model winner Doring's comments about the win­ covered with aluminized film weighing event. A basic specification is set, there is ning model: 16 g/sq. m. This saves 0.5 gram compared a period of trial and error until the best solu­ "/ flew this championship with my Espada with tissue, does not warp in heat or tion appears to be found. Then, when the 80/1. I have three fairly well-trimmed moisture, and it reflects light on DT, mak­ basic design which suits the rules is found, Espadaswith the same design. Distinctions ing it easier to spot the model. The only the winning entries are all very similar to are in the wing airfoils, but I could not see disadvantage is that field repairs are difficult. one another. The next step, obviously, is important differences between them. "A flat-plate all-moving fin is used, while tochange the rules, to encourage originality " The solid balsa wing is carved from the fuselage is in two parts; motor tube is and creativity (Starting to sound like the FAI 70-80 kg/m5 (4 1/2 to 5 Ibs./cu. ft.) wood. 30 mm diameter aluminum tube with Power event?). But at least, the contestants A suitable plank is first cut in such a way as 0.2 mm walls, and the tail cone is 1 mm are having fun, as the photos attest. (I'd to exhibit quarter-grain on the larger faces balsa, covered with tissue. especially like to thank Michal Thompson and a blank glued together with epoxy so "The propeller is calculated by andJimPriceoftheHillsboro Argus for pro­ the entire wing surface, made from 6 pieces Theodorsen's method and made from viding me with the negatives of this year's of balsa, shows the same grain. The wing is 2 laminations of 1.5 mm balsa, molded on smashoff, and leff DreilingofourHilhilites covered with lapanese tissue. After cover­ a former, using wallpaper paste, the carv- DARNED GOOD AIRFOIL - GOTT. 81

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

UPPER 1.2 3.25 4.4 5.86 7.0 5 7.8 5 9.1 5 10.01 10.76 10.60 9.95 8.61 6 .9 5 4.9 5 2.7 1.61 0.27

LOWER 1.2 0 0.16 0.65 1.1 1.5 Z 1 5 2.74 3.33 3.28 3.01 2.69 2.15 1.5 0.81 0.4 0

MARCH 1982 63 SPARS 1.5x1.5

3x4 **- B ______1 .5 x 8

TAILPLANE AIRFOIL

DETAIL OF L.E. TURBULATOR

64 MODEL BUILDER Hugo Sandroni, Jr., this month's Jr/Sr, with his original design A/2 "W hy, when I was a boy, we built them with wings higher than our glider. The pair have done very well at West Coast contests. heads!"

ing being confined to the upper surface. section for a Mulvihill or gas model. some comments by Nats Electric F/F win­ Thinned epoxy is used to cover the blades MYSTERY MODEL ner, Bill Baker, on howto make the best use with 24 g/sq. m. (3/4 oz./sq. yd.) glass cloth, This month's MM is not just your typical of your "electrickery", as reprinted from with 2 layers near the blade roots. pusher canard rubber model. Well, maybe the CIA Informer: " Under normal conditions I use rubber it is, but it's a little smaller than most pub­ "The main thing is not to overcharge! with a 43cm length to give a power run of lished . . . about 140 sq. in. in the large It doesn’t matter how fast you charge, just 33 seconds. A 3-function Seelig timer holds wing. The total weight, less rubber, was less so you don Ί overcharge. If you use 225 mah the tailplane down by 3 mm at the trailing than 2 oz„ so it had quite a performance Ni-Cds you can charge them at the 10-hour edge for the first 4 seconds of the climb, and potential on the suggested 3 oz. of rubber. rate (22.5 ma) for 14 hours and they will also operates the auto-rudder and DT. Trim If you think you can identify this mystery become fully charged. Why 74 hours? It's is right/right. model, send in your guess to the Model because something is lost in heat and so "Propeller diameter is 620 mm, pitch Builder office (621 W. 19th, Costa Mesa, there is not 100% efficiency in charging. 730 mm at 200 mm radius. Outrigger at­ CA 92627) to see if you've won a free Rather than go crazy over such things, just tachments at 50 mm radius. Airfoil is a 'Dor- subscription. play like your 225 mah cells are really ing5% (similar to wing airfoil) with a 0.4 mm CHARGE!! 250 mah cells (like those supplied with the thread turbulatorat 7.5% propeller chord." The newest form of F/F propulsion system Astro 02). A 250 ma charge times one hour Paul Lagan adds these comments: is electric, and unfortunately, not too many will fully charge in half the elapsed time. So, "Reiner Hofsass was the original designer of us "old dogs" have bothered to learn the one amp (WOO ma) times 1/4 hr. (15 min.) of Espada and is in close contact with Lothar tricks involved in making use of it. Here are will do the same as well, or 2500 ma in Wakefield development. Much of (Dor- ing's) success comes from having reliable models which can be flown in a wide range of conditions just by altering the motor length and thus the prop run. He used a temperature and windspeed chart recorder pair. .. one pair of sensors located upwind and a second at the launch point. By com­ paring readings, and from experience, he could judge when a suitable piece of air was coming through his launch point. Lothar read his own indicators and did not seem to depend on anyone else for his model preparation or his lift picking." DARNED GOOD AIRFOIL Gottingen 81 This month's DGA is another "oldie" from the WW-I vintage tests conducted at the Gottingen wind tunnel. These tests showed a very high lift coefficient (nearly 1.5) at a Reynolds number (uncorrected for turbulence) of about 72,000. Besides, Bill Gieskieng wrote and said that the Gott. 81 looked the best of the lot of airfoils he looked at for flapper use . . . and it looked at lot like the Goldberg G-10! The Gott. 81 flunks the Eppler test for upper surface drop­ off, but try it anyway, if you're looking for a moderately thin (7.5%) undercambered MARCH 1982 65 "I saw the (1/2A Kiwi Power model) design by Lew Mahieu at the first contest C k a /ifc e s Φ α ο ίίο δ that I ever attended and I'd like to build one. R/C GOODIES . . . Could anyone tell me where to get a Chorlie offers BEST BUYS in R/C plan and also the date of publication or pro­ Systems. P Ο BOX 192 VAN NUYS CA 91408 duction. NZ rules allow models up to 1st All Systems convertible up to 5 1213) 764-1490 January 1951. Also, what if any motors channels. SPECIAL 810 (.049) were produced prior to this date?" R/C SYSTEM Std. System has dry Tx, Rx Nicads Well, all I can say about the 1941 & Elite Pack Chorger. Deluxe Mulvihill winner is that the April 1942 issue System hos Nicods in Tx, plus Dual of MAN featured plans of the design by Ray Charger. Smithasthe1941 winner. H. Heller won the 1940 Mulvihill event, maybe these are the 2- CH., STD: $99.95 plans Ron H has. (Ray Smith is located in 2 Servos deluxe: 114.95 the Washington D.C. area, and currently holds the world R/C sailplane altitude record 3- CH, std: $114.95 at over 4900 feet, wen) 3 Servos deluxe: 129.95 I think the Kiwi was produced after the 1951 cut-off date. It was kitted by Gillow's, 4- CH., STD: S129.95 so there may be some plans in existence 4 Servos deluxe: 144.95 (Pond's list doesn't include a Kiwi, but my 4-CHANNEL SYSTEM SHOWN catalog is 2 years old). I would guess that 1951 vintage .049 engines would include SHIPPING S6.50. CALIFORNIA Both Systems include 750 mw Tx with Open-Gimbol the K & B, Cub, Spitzy, and Wasp, since all RESIDENTS ADD SALES TAX. Sticks, plug-in Receiver, Rx Nicods, Charger, CH-4 these engines were advertised in a January MADE Servos ond Servo Trays. 72 MHz ONLY 1951 issue of M.A.N. IN Add 4- 1/2% Surcharge for Visa or Master Card. For those of you out there looking for U.S.A. Complete Catalog - 60c inU.S.A., SI .70 Foreign thermistor, like Rich Rourke was a couple of issues back, Jose Tellez writes to recom­ (2.5 amps) times 0 .1 hr. (6 min.) is what I seem to work well. A larger prop increases mend Omega Engineering (Box 4047, Stam­ use to get back into the air as soon as current consumption . . . that is, the power ford CT 06907) as having "most anything possible. curve would drop faster. a human may need in the line of ' 'Measure voltage to tell when the cells are "I have an EK expanded scale voltmeter temperature sensing". Write for their fully charged. It is overcharging that ‘kills' that is a help. It puts a load on the cells and catalog to see what's available. the Ni-Cd cells. Should you have 1.35 volts measures from 4 to 5 volts, where 4 is O' The fi nal letter of the month comes from per cell with no load or 1.25 volts per cell and 5 is full scale. Fora4.8volt battery pack, Donald Ross (Creskill, N.J.), who says: "I with a load . . . you have a full fuel tank. The this would be 4.4 volts discharged and returned to modeling about two years ago power curve is like that pertaining to rub­ 5 volts fully charged. You wouldn Ί need a after a lay-off of about 20 years for the usual ber . . . a burst, followed by a cruise, then voltmeter, but they give you a good battery reasons . . . family, job, children, etc. a sharp drop in power that you can hear. check. "I was surprised to find that free flight had Discharge to this point, which should be " You do not need an expensive charger almost died out and that there was almost about 1.1 volts per cell, and try not to either. I charge from my car battery with a nowhere to fly in the Northeast. All around discharge them further. To get the most commercial VL charger. All it is . . . is an am­ are RC clubs and no one can even build a power, charge them up and run them down meter and a variable resistor, plus a clock small HL glider. Many techniques have to this point . . . then recharge again before that will stop the charge. That is, it can be changed, and covering with Japanese tissue your first flight. After the flight, run them set for 5 or 6 minutes and ignored, and it seemed like a lost art. down again before recharging. Don't at­ won't overcharge the batteries. You can do "After awhile, though, I found a few kin­ tempt to just replace only what has been without it if you remain there with stop­ dred spirits by attending some local meets used. With good batteries, you might get watch in hand. You should have something and by reading all the mags. I have an ex­ two or three test flights per charge, but for to measure current and voltage if you are tensive collection of mags and plans dating contest flights recharge for each official to avoid overcharging. back to the late 40's and was only waiting flight The power curve is not really flat dur­ " Ventilation for cooling of the Ni-Cd bat­ for the proper time to be able to get started ing cruise, so you need to fly on the upper teries is not really necessary for our short F/F building. part of the curve (or most power. runs . . . doesn't hurt though . . . for if your "The enclosed picture shows me with my "Do not load the 020 with a lot of prop. batteries do get hot you may have a prob­ Upshot Unlimited Rubber from Champion Astro Flite says a 5 Ά/3 Top Flite, and it does lem. For instance, if there is a short Models. The airplane flies very well, and is somewhere. . . you have burned out a extremely stable and easy to adjust. The kit is very well made and reminds me of many EMS SR-1 motor . . . etc. It can happen quickly if the motor lands or crashes with the power of the Cleveland kits. SERVO on .. . stalling the motor with the battery "I really enjoy your mag. Hints for F/F REVERSER power o n." as well as R/C, and a Peanut in every issue. Probably the best all-around magazine for Price - $10.95 (Include 61.00 LETTERS FROM READERS DEPARTMENT the money." (The man obviously has ex­ per order, for From down under in New Zealand, Ron cellent taste! wen) shipping and handling.) Magill writes: "W hen I was in California Thanks for the kind words about MB, Plugs into your system between the Receiver 3 years ago, I was given a plan of the 1941 Don . . . nice to hear from a satisfied and Servo and reverses the direction of that Mulvihill Winner, by Heller (Mark?) drawn reader. I suspect that your experiences in servo with relation to the Transmitter Stick by Roger Gregory. While I was halfway re-entering the model airplane world, like motion. Available for all popular positive or through building it, I read of the kit of the Rip Van Winkle, were interesting, to say the negative pulse systems w ith connectors in­ 1941 Mulvihill winner designed by Reid least (and probably getting more common). stalled. An extremely handy device when Hull. I borrowed a set of magazines to verify Which leads to the next subject. installing your system in a new airplane. the age of my model and found a Nationals RUBBER MAKES A COMEBACK Master Charge and VISA report and photo showing a Raymond Back in the old ancient days before the Dealer Inquiries Invited Smith receiving the Mulvihill Trophy. Could first gas engines, rubber-powered models ELECTRONIC MODEL SYSTEMS you (or your readers) shed some light on were king of the hill. The advent of the gas 6175 Palo Alto Dr., Anaheim, CA 92807 this subject? engine made most flyers flock to the latest

66 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER thing (as control line did unto F/F, and R/C unto both of them) for their flying thrills. For NOW , THERE'S A PRIMER over a year now, however, I have been reading and noticing tell-tale symptoms that RECOMMENDED FOR COVERITE. rubber is making an unprecedented come­ New Primex solves a nagging problem. Now you back. On the West Coast, rubber entries at contests are outstripping the formerly over­ can be sure, for the first time, of getting great whelming numbers of gas flyers. (50 entries adhesion. Now, when you remove the masking in Wakefield at the USFFC in 1981, and tape, the paint job, will stay down! Primex is more than 40 at the Taft FAI Semifinals.) Rubber-powered scale models are popular, ' ------7 ultra-light, smooth, and even with R/C clubs. Indoor flying, especial­ ^ ■ £ 1 åå I very quick to dry. Easy to ly at the local, low-ceiling level, is drawing as much interest as Outdoor. l apply with a brush, What’s the reason? I had a chance to ■— ------extremely sandable. Primex is discuss this with Al Hotard, who dropped now the only primer to use on Coverite by for a visit recently, and who has per­ sonally witnessed the renaissance of rub­ (Super, Permagloss & Silkspun). ber. One factor in the upsurge is un­ It is equally great on wood, doubtedly the present availability of good tissue, silk, nylon or dacron. rubber, after a 3 or 4 year drought. But this certainly isn’t the whole answer, as the Look for the bright yellow numbers of rubber flyers are greater than can at your before the great rubber shortage. R/C dealer. Al suggests that the reason may lie in the relatively advanced ages of the newer rub­ ber flyers. These are either old-timers (like Don Ross) returning to the hobby, or gas flyers who have decided to switch events. For the returning old-timer, rubber events represent an ideal entry point, as the basic skills of building and flying haven't changed that much, and the models are easier to trim out and fly than today's high- powered gassies. For a gas flyer, these easy-to-fly models make a welcome contrast to the hair-trigger COVERITE řJ L response of the modern gas models, which 420 BABYLON ROAD. HORSHAM. PENNSYLVANIA 19044. U S A are a far cry from the low-and-slow characteristics of the gas models he may 20 kits/month). George managed toqualify background and the license number has have flown earlier in his career. In short, to­ for the FAI Finals with his prototype, so it a white shadow. W hite tissue doesn’t day's high-performance, high-powered gas looks like a good way to get started in show up well against any color, so I cut models may now exceed the trimming abili­ Wakefield. Price for the complete kit is out the yellow tissue and glued w hiteon ty of older modelers. Rather than put up $39.95 (shipping included). Write George from behind. The white tissue was cut with a seemingly endless series of crashes at 880 Carmen Court, La Verne, CA 91750 out slightly larger than the opening in on increasingly expensive gas models, he for a complete catalog. · the yellow. It takes more time, but I may have decided to try the silent side of think it looks sharp. The word “ Experi­ the field, and rubber certainly requires less mental” on the lower right wing was physical effort than glider. Short Shaft...Continued from page 23 added with a No. 3 Rapido-graph pen A look at most large contests will show after the wing was covered, but not that at least as many rubber events are attached to the fuselage. For “ Canary” you might consider doing it out of brass, scheduled as gas events. So, he would still on the fin, I use a No. 1 Rapido-graph it is probably half again as heavy as an pen. “ Hot” and the flame was applied be able to do as much flying as he used to aluminum one, and is possibly a little do when flying gas exclusively. with a fine brush and Stearman Red slower to make on a small lathe, but it dope (plus a steady hand). Then, too, the price of rubber motors ap­ has a number of decided advantages. Center the stab in the slot and glue pears to be quite a bit less than that of to­ For one, it will not bind up on the shaft only the stab leading edge to the fuse­ day's Schneurle power plants and the fuel and have its threads eaten off by the lage. Place shims under or above the to run them. This is probably an illusion of harder material; it will not cross thread rear of the stab for trim. economy, since a serious rubber flyer as easily; and the threads will not distort (Peanut excepted) will probably buy an if you are little heavy handed with the Build as light as possible, because the amount of rubber in a year equivalent to prop nut wrench. Try it, you'll like it. long nose moment and large size could the cost of a new engine. In fact, try the whole system, you’ll produce a very heavy turkey. My model It will be interesting to see if this is only like it ... all of it, including the security tipped the scales at 7/8 of an ounce a West Coast trend, caused by the length of knowing that your prop is not going (heavy peanut) and required a small of the flying season and number of contests, to fly off, now being held by more than amount of tail weight. I changed props or if it will spread to the rest of the country. 1-1/4 threads. This I do understand. · from a plastic to a lighter, carved balsa (Our plans sales of rubber ships has been one, and it still needed a little clay on the proof that this trend is fact, not fancy, wen) tail wheel. CHAMPION KITS NEW WAKEFIELD Peanut...... Continued from page 52 The model flies on one loop of 1/8 One other reason for a rubber resurgence rubber 15 to 17 inches long. See the has been the availability of nice kits from plans for the balance point. our FF cottage industry manufacturers such parts acted like they were pre-stressed. The Hot Canary is a real show stopper as Blue Ridge, R/N, and Champion Model I covered the Hot Canary in the and is a large fast flier. It likes big circles Products. George Schroedter of CMP an­ conventional manner until I got to the to the right. Be different. Build the big, nounces that his Wake-Up Wakefield kit is side numbers (97 and N4777W) and 97 yellow bird and maybe you can race a now in production (at the rate of about on the left wing. The 97 has a white Pitts Special or a Pogo. ·

MARCH 1982 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 67 Patent Pending

If you would like more information, watfØgiføD® ^©[jDiiaatrØ write for free literature.

.60 carburetor MONEY BACK GUARANTEE

Carburetor shown approx, Unique new design means smooth idle actual size

plus quick throttle response. © 1982, Martin Enterprises

Phase I Program and are now in limited production. We did not and response quick throughout the entire RPM At the Toledo Trade Show, selected modelers feel there was any need for “just another car­ range because of the non-iinear design of the with an average experience level of over 12 years buretor" in the modeling field. If we couldn't of­ throttle actuator. And with only 12 parts, the were offered an extremely low price on a special fer a carburetor that was substantially better M&H Carburetor is simplicity itself. new carburetor. In return for this low price, they than existing technology, there would be no Phase III-W hat Is Next? were asked to help us evaluate its performance point in going to the marketplace with It. But this By September, this model as well as new by filling out and returning a questionnaire on carburetor IS better. models for .40 to .90 engines will be available the carburetor. What they were testing was the Many Unique Design Features through distributors and your local shops, but M&H Variable Venturi Carburetor, and their First of all, the M&H Carburetor is all metal for we will no longer be able to offer you this low, responses confirmed our high hopes for this strength and to hold the close tolerances re­ direct mail price. So if you've been looking for a new design. On a one to ten scale, the average quired for precise operation. As the engine is better carburetor, now is the time to buy. rating w as 8.6 —and no one scored it below an 8! throttled back to idle, the fuel draw increases Our Guarantee Best-liked features were its mid-range perfor­ due to the location of the idle jet. This elim inates Order now by sending a check for $19.95 to mance and smooth re­ HOW IT WORKS "spitting" of fuel from the MARTIN ENTERPRISES, 170 Navajo Street, San sponse to throttle input. intake. Idle adjustment is Marcos, California 92069. We will pay all pos­ 96% said there was no car­ made by using any com­ tage and handling costs on prepaid orders. C.O.D. buretor on the market to­ mon coin for a tool. For orders sent by UPS. Specify model 6000 for day they would rate higher. your safety, we use an off­ sport flying or Model 6000L for Competition fly­ Phase II —Now is Your set needle valve for ad­ ing. (Model 6000L has a slightly larger throat dia­ Chance justments to the high meter.) If for any reason this carburetor doesn't After going over all the speed fuel flow, keeping meet your needs, simply return it within 90 days evaluations, we made a your hands further from of purchase, and we will gladly refund your full few minor adjustments fu ll th r o ttle IDLE prop. Operation is smooth purchase price.

ticated R/C examples. Entries range 4. Bell P-59 Airacomet & other from brand-new barely-tested radical unspecified jets Our New designs to “ old-timers” which appear to 5. Bell P-39 Airacobra Expanded have participated in all 15 contests! This 6. Curtiss XP-55 Ascender canard 7. Boeing B-17 nunanuc■ year each entrant received an attractive M J S M M O D U S metal plate dedicated to the memory of 8. Messerschmidt Me-109 Catalog the late Jack Northrop and his remark­ 9. North American B-25 able flying wings. 10. Supermarine Spitfire is Ready! MAGNETIC MODEL MOUNTS? 11. Piper Cub According to Southhampton Univer­ 12. Bell P-63 Kingcobra sity (England) experimenters, suspen­ 13. Helicopters W · offer the very Best In Scale sion of wind-tunnel models has always 14. Consolidated PBY-5 Catalina RIC Model Boat Fittings . . . been a problem. Mounting the test When asked about the most popular Quality Fiberglass Hulls A Operating Accessories! models with wires or on a rigid “ sting” features of Comet kits, customers liked Our new 4th Edition Dynamic Models’ Catalog — prevents free movement and disturbs ease of construction of Speed-O-Matic 56 pages detailing Fittings. Hulls. Hardware the airflow. Under a study contract from models, simplicity, appearance, use of S3.00 (refundable 1st order) NASA, the university researchers are balsa wood (remember the war-time A#nunanucSJ \'onr t $ suspending models magnetically, which shortages, w.c.h.), authenticity of solid- P.O Grower C Port Jefferson Station NY 11776 permits a few degrees of movement and models, completeness of plans, and minimizes airflow disruptions. A possi­ building instructions. ble problem, involves failure of electri­ Among unpopular features and com­ Hannan...... Continued from page 50 cal power, resulting in test model "fly ­ plaints, customers cited: difficulty in away” at 200 mph or so. Oops! construction of Speed-O-Matic pro­ forward to the next one. Contest Direc­ COMET CONSUMER COMPILATION pellers, "hardwood" construction in old tor Carl Hatrak (free flight), Harry Bill Bishop, founder of the Comet stock (wartime) kits, lack of enough Apoian (R.C.), and their patient assis­ Model Airplane & Supply Company, tissue to cover model by inexperienced tants, managed to arrange perfect favored us with a copy of a consumer builder who failed to utilize paper weather again this year, only one day survey analysis conducted in March of properly, and use of highly unscale after the full-size fly-in at Ramona 1945. This was based upon customer paper colors in flying scale kits (such as Airport was nearly blown away by fierce replies to questions enclosed in Comet red in a P-47 kit). winds! kit boxes. The average age of the 236 By way of suggestions, customers The chief appeal of the “ wing” meets repliers was 13.2 years, by the way. wanted the following: is their low-pressure, friendly approach Results were as follows: Formed transparent cockpit enclo­ to competition. Entries range from Most popular designs suggested: sures, charmingly simple rubber-powered 1. Lockheed P-38 Lightning Greater variety in range, to include types, through tow-liners, gas and elec­ 2. Northrop P-61 Black Widow more bombers and foreign aircraft, tric powered free flights, to quite sophis- 3. Boeing B-29 More pre-shaped and pre-cut parts.

68 WHEN CO N TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Include cement in more expensive been demolished and the Leimert is now kits (50c and up). a church.) Both were quite large halls, RUBBER STRIP Include plastic or die-cast metal and for the demonstrations I flew a 20- FAI RUBBER. Made in U .S A propellers in solid model kits. inch span semi-scale lightweight rub­ SIZES: 1/4". 3/16", 1/8".3/32". Use turned wheels that are truer to ber-powered Fokker Super Universal. If 1/16". by 1mm (.042") thick. scale. in plan view the theater stage was at 12 BOXED 16 ounces of rubber per box. Have new designs on market sooner o'clock, I launched at the 4 o’clock PRICE: $1200per box, postpaid after disclosure of new aircraft types. position; the model circled counter­ Wonder what a survey of present kits clockwise across the front of stage and in U .S A would produce? landed back at about the 6 o’clock NEW PIRELLI NEW PEANUT RULES position. It couldn’t quite make it back SIZES: 6mm, 3mm only, 1mm thick Regulations seem always subject to to me hand-wound. Forewarned, the PRICE: $18.00per hank change, and Peanut rules are no excep­ kids froze as the model glided down, (approx. 1/2 Kg.) tion. In France, where Peanuts are called and held their freeze until we retrieved TIMERS: KSB. Fuel & D T : $11.50as. "Cacahuetes” , flight durations have it undamaged, and flew again. The plus 10% UPS. risen so remarkably that an attempt is theater projectionist kept a bright spot­ Sol· U.S. Distributor and World W id· being made to put more emphasis upon light on the bright red Fokker in the dark mim. Send 254 for 1981 CATALOG. model accuracy and detailing. Initial theater, and its clear plastic windows Γ. A .I. M odel Supply testing for the new rules was planned for sparkled in light. The kids really went P O BOX 5*V' ΓΟΛΛΛΝ« CAtOSlO the Sports Palace indoor meet in O r­ wild over the smooth, steady, circular leans, employing both new and old flight." Peanut regulations to enable easy com­ SIGN-OFF The Best in Ducted Fans: Designed by. parisons to be made. The basic frame­ From Frank Zaic’s recently reprinted Bill Effmger work of the proposed formula is to 1934 Junior Aeronautics Yearbook: "He Plan Set require three flights of at least 20seconds who laughs — lasts.” · •RCDF-1 each, with rise-off-ground starts. This $19.95 qualifies the model for static scale Blackburn....Continued from page 60 judging, the results of which will deter­ N a v y F 4 D -1 mine the winners. when the model is held at the center of DOUGLAS "S#C YR A Y ” In the words of J.F. Frugoli, "The jury's each wing A 1" Scale Ducted Fan R/C design for the ears will b uzz.. . . " COVERING & FINISHING RK-20 Ducted Fan unit. 44" length overall. I used white heavy duty silkspan on Our latest: DOUGLAS "SKYRAY" Novy F4D-1 RK-20 Ducted Fan design. Plan Set BRCDF-1 at $19.95 VOTE OF CONFIDENCE the fuselage, light weight white silkspan "Big is Beautiful'' model columnist (Add $2.00 for Rolled Plan in Mailing Tube) on the wings and tail The stab and Dick Phillips, of Canada, offers this Customer Design Service offers the finest layout Plans elevator are covered on the top surface to make your own kits. Brochure $1.00 Refundable thought for the day: "Government pro­ only The whole model should be given jects are all designed by computers, as at least two coats of clear dope. Thinned The Best in Custom Designs: no mere mortal could possibly foul (50/50) dope should be used on the wings W.E. TECHNICAL SERVICES, INC. things up so completely." and tail, with care taken to avoid warps. Box 76884-B. Atlanta. Georgia 30328 AHA! IT IS A SPRUCE GOOSE! The sheeted front should be painted dull Well, partly. For years, detractors of silver, and the cowling interior flat black. 3. It is desirable that the model fly the nickname "Spruce Goose" (appar­ FLYING left-left if possible, but go with what ently including Howard Hughes himself) 1 Like any other model, the key to seems right for your particular model deemed the term inappropriate on success is to make sure the model bal­ 4. If climb is too steep, increase down- grounds that mostly birch plywood was ances at the point indicated on the side thrust. Glide can be fine trimmed with employed. But according to the Septem­ view The original did not require any ad­ the elevator Use rudder sparingly and ber, 1945 Air Trails Pictorial, the fabulous ded ballast. If necessary, add clay to only as a last resort. flying boat also contains poplar, maple, nose or tail to achieve position shown The model is extremely graceful in balsa (!) and spruce. It seems that the 2 R.O.G. your model, using full power flight, moving at scale speed, and look­ hull frames and bulkheads are of birch, with about a 15-second run. If not air­ ing very realistic due to its good size. Good luck, fair skies, and gentle but the stringers are a composite of borne after a 30-ft run, gradually de­ breezes. birch and spruce. crease downthrust. Dr. Vance J. Hoyt, author of the article, also described the very light finish, consisting of one coat of wood filler, one coat of sealer, one layer of tissue paper(l), two coats of spar varnish and one coat of aluminized spar varnish. (It is our understanding that the ma­ chine has since been repainted white.) No firm announcement of a public opening date is available at this writing, but it should be well worth the wait to view this enormous flying machine. THAT'S SHOW BIZ! Ken Hamilton, designer of the de­ lightful Flying Flea featured in Model Builder some time ago, reminisces: "Years ago when I was a high school senior, I briefly worked after school at no pay, in a tiny model shoptrying toget started. The owner arranged for us to make a demonstration in two theaters at Saturday matinee time, the Mesa Thea­ ter at Slauson and Crenshaw, and the Leimert Theater at Vermont and Cren­ shaw in Los Angeles. (The Mesa has since

MARCH 1982 WHEN CON TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 69 CONTROLLED INSURANCE FROM Pattern...... Continued from page 25 ODELS INC. it looks, the thing will roll, bank easily YOU'RE IN G000 HANDS WITH A ... « R a m and is frankly a smooth flying design. 4736 N MILWAUKEE AVE . CHICAGO. IL 60630 USA The point here is that the stabs can easily BATTERY BACKER AREO 09. Senses low or intermittent voltage from the primary RX battery and switches to provide a rolling force. a tOO milliamp or larger backup battery, then sounds an audio alarm. Eliminates the most common cause On another plane, a pattern ship, we of radio failure. Backup battery and switch harness are required. 1%" x V x ’/<’ plus beeper V x V x '/«' found an odd characteristic. During Total weight 1 oz. $39.95. DUAL SERVO SETTER AREO 10. Senses loss of radio signal or low battery and moves TWO servos to a pre­ landings, the thing would drift to one selected position Connectors required. I V x 1'V x V . Weight 1 oz $39.95 side as it flared. Also, the wing required a AUDIO BATTERY ALARM AREO 11. Can be easily installed in either the RX (4.8 volt) or TX <9.6 volt) system slight trim for level flight. We went Senses low battery voltage and sounds an audio alarm. V x V x V plus beeper V x V x V . Total through a careful measuring checkout weight .5 oz $19.95 and found that one stab half was out 60 BOX AREO 12. Superbright red and green LED's tell you whether your RX (4.8 volt) and TX (9.6 volt) approximately 1/16-inch at the trailing batteries are ready to "GO" Connectors required. 3’ x 2 V x V . $24.95 AU0I0 FLIGHT TIMER AREO 13. Dependable, solid state, can be set from 37 seconds to 20 minutes. Flick a edge of the tip. The error had occurred switch to start and stop. 9 volt battery required. 3" x 2 V x V . $24.95 during the M onokoting process. This IF UNAVAILABLE LOCALLY. ADD $1.00 FOR OIRECT OROER. NO C.O.O. SENO S.A.S.E. FOR INFO. was easily corrected with the M onokote iron. Both problems ceased. A Curare with bad pitch-up in left Simple Simon...Continued from page 47 works well on foam, and partially be­ Knife Edge and down in right Knife Edge cause by covering entirely with film you . . . the reason: twist in one stab. Again, motor mount, being sure to keep the keep the whole thing light. The area rem em ber. . . one stab half is dominant thrust line in the exact center of the immediately around the firewall was in knife edge flight. firewall. Place the top fuselage piece on treated with Hot Stuff before covering. M inor variations in the wings will also your workbench and epoxy the firewall Remember to cover the firewall with cause weird problems. At a demonstra­ to the front, using a square or a builder’s film before installing the motor mount. tion, I had a spinner come loose and triangle to keep it square, with equal Use sealing tape on the wing/fuselage bounce into the wing leading edge overlap on each side. The sides are next joint. about one foot from the tip. It bit out a glued to the top, using cyanoacrylate RADIO INSTALLATION chunk about the size of a silver dollar. glue, and epoxy at firewall, again being The Simple Simon prototype was The resulting difference in drag was careful to keep it square both front and flown with an ACE receiver. Bantam surprising ... the thing would drop the rear. Follow this with the chin block servos, and a 100 ma pack. This battery is wounded wing severely during any behind the firewall (epoxy) and fuselage sufficient for six flights with no problems sharp pitching maneuver. sides (cyanoacrylate). The block will encountered. Servos are installed with I hope no one is saying, “ Oh well, I have to be notched to clear wing double-sided tape and receiver and don’t need a well trimmed plane 'cause doublers. Then, using a triangle to keep battery are wrapped in foam and stuffed I’m just a beginner.” WRONG!! You things lined up, glue on rear lower up in the nose just behind and underthe need it more because you will form bad fuselage balsa crossgrain. Final step tank. flying habits with a crooked bird. before assembly is to make the fin by FLYING By the way ... although we didn’t gluing parts together. Cover tail assem­ Simple Simon was designed to fly on a mention itearlier,makecertainall hinge bly separate as described before and TD 049, and has no bad habits. Just make gaps are minimal, perferably sealed with then glue on fuselage (also pre-covered) sure it balances at the point shown and a flexible tape. You can easily screw up keeping it sauare with fuselage. Add all surfaces and engine thrust should be aileron deflection doing this, so be dowels for the wing hold-down and set at 0 degrees. Throws to start with careful. you're all done with the fuselage. should be approximately 1/4 inch up Please let us know if you have a FINISHING and down on elevator and 3/16 on particularly odd trim problem you Simple Simon was entirely covered aileron. Fill up the tank, make a range solved or would like to share with the with World Engines film ; which is a low check, fire it up, tweek it out, throw readers of this column. temperature film, partially because it Simon into the wind and have a ball! · Till then ... Dick Hanson. ·

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Full coverage of model activities from the European and formulas speak to you with their own language. Continent. Plenty of new developments, experiments, Monthly. Ask for a l-year’s-subscription. Send your new models and equipment. A variety of plans and cheque (US-$ 32,-) and you will find RC MODELLE 12 photos. No German required. The sketches, pictures times a year in your mailbox. Please send your order and cheque to: RC Modelle, Grundstr. 40, D-7022 Echterdingen 3, West-Germany.

70 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER 18,000 R.P.M.’s on an 8-4 Maple Prop!

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The Exhaust may be positioned to left, right or facing rear. It runs great on economical Fox "Gold Star" Fuel) It starts easily by hand. That's a nice feature. Large 11 mm. front main and rear main Ball-Bearings to withstand the radial loads of electric starters and belt-drive or spur gear systems for large props (or race car Bore: .650 Stroke: .600 Displ.: .199 type use). You may even choose your exhaust position. Loosen four R.P.M. 18,000 on an 8-4 Maple Prop machine screws and rotate the cylinder left, right, or rearward for your cowling convenience. A really smooth idle and screaming performance Fuel Consumption: .4 oz. per minute when you want it. You can expect more from this .19, it tears holes in the Full Size Fox 19 BB-RC Engine Drawing available on request sky. Economical on fuel too! We think you'll like it.

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MARCH 1982 WHEN CO N TACTIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 ENGINE CYLINDER HEADQUARTERS! SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take the hard work out of radial engined models! These highly de­ tailed cylinders are precision molded from high-impact styrene, and fea­ ture deep cooling fins. SIZES: Whirlwind: 1", 1 2 " scales U Rhone: 1", l 1/," , 2" scales

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R/C Cars . . . . Continued from page 43 in some more and you might even miss the days much more enjoyable. You can run other car completely, sticking your own right alongside anybody on the track and car in the boards. not be worried about him taking a cheap out and race, have a good time win or lose, If subtle techniques don't work, there are shot at you. and needn't get wrapped up in what is other ways. One of the best is to have a THE SUSPENSION REVOLUTION... happening on the Pro level, other than to good announcer on the p.a. Best example We are all aware of the suspended 1/8 be aware of what can and does sometimes I have ever seen personally was at a club cars out and in development, but here go on there. race with Cary Kyes handling the mike. come the 1/12 cars with suspenders, and CENTER-PUNCH ARTISTS... We had one racer who seemed to be do­ I must say that I am really surprised by it, As long as this column has dealt with ing some blocking, although none of us having always assumed that flat-pan chassis cheap-shots, wouldn't be right not to apply were ever completely convinced it was in­ were ok, and enough lighter than a boinger some of this rambling to good old club rac­ tentional. Still, it was happening once in car to be not worth the trouble. Besides, ing. Even at a local race where people who awhile, and finally Kyes got on his case, there is the problem of the motor, which are at most other times friends, the prac­ using the racing number of the car to iden­ almost has to be close to the axle and to tice of banging on another car can get tify who he was after, not the racer's name, add that heavy chunk to rear suspension started and the solution to the potential an important point. Gary went into what would be severe handicap, what with all problem is to never let it get started, or at turned out to be a hilarious routine about of the unsprung weight that would mean. least to shut it down immediately anytime being able to tell one's left hand from the Still, Associated says they have it all it happens... or seems to be happening... right, slipping into the old "This is my han­ figured out. and while early versions of as it is only rarely that a take-out move dle, this is my spout" bit, urging the racer what will be called the RC12i were a little can't be explained away. It's when one or to turn to his "handle side” at the end of porky, they now have the weight down two racers are always doing this explain­ the straightaway. In this case, it worked. close to ROAR minimum with production ing that you have to take action. With another racer, a similar amount of parts. At this time, all I have to go on is a The best action seems to be a very sub­ ribbing did not work. Here we finally had long-distance conversation (my nickel tle one, that of having club leaders, to let him know that the next time he again) with Roger and Gene at Associated, generally experienced racers anyway, leaned on another car, everybody else in and they say the car really is very good and point out frequently that smooth, crash- that heat race was going to make sure to will be available late February or early free driving is the best way to get back to pound him up against the boards at every March. the finish line as quickly as possible. This opportunity. You see, team driving tactics Anybody familiar with 1/12 racing has to can be done via the club's newsletter, at only work if you have a team; one racer know that Associated was the first to club meetings, and the races. What is so against everybody else hasn't a chance if develop a car that really handled well and good about this is that it really is true: the others get tired of it and turn on him it was an instant hit at club races, forcing crashing only slows you down. Sure, you en masse. the rest of the manufacturers to play catch­ may be able to successfully wipe out the In our club, at least in recent years, we up, just to stay even. These other factories one guy trying to pass, but you will lose have made every effort to insure clean, did an exceptional job of getting back in time doing it, letting the next car reel you competitive racing, and it has made race the race, so to speak. In fact, depending upon your needs in a race car, a very con­ vincing argument can be made that everybody else not only caught up, they also advanced the state of the art further. DELTA R/C Race Cars Now Associated is very close to having production suspension cars available when * 1:8 World Champion Gas Super-J everybody else is fine-tuning flat-pan cars, ♦ World Champion Picco 21 Racing Engine having done very little in the way of ex­ * 1 :1 2 Electric Phaser 120 perimentation with full front and rear * 1:1 8 Electric "Pocket Rocket" suspension. We manufacture the most complete The racing season in 82 will be a very line of gas R/C race car accessories. interesting one indeed... · We manufacture competition oriented 1:12electric race cars and accessories. Send $1.00 fo r catalog package DELTA Mfg., Inc. 27 Racecar Court, Lorimor, Iowa 50149 USA______Phone: (515) 763-2220^

72 WHEN CON TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER TRY TH IS FOR S IZ E ! Yes, this is the actual size"

7.5cc (.45) OUTBOARD ENGINE It’s no longer a rumor! The K&B 7.5cc Outboard En­ gine is here . . . the engine you’ve heard about for over a year. A tough water cooled competition en­ gine and a big brother to the K&B 3.5cc, it will provide not only the power to make outboard boating even more fun but the superior characteristics of outboard drive to enhance its maneuverability. The K&B 7.5cc features a new K&B metal carburetor plus pressure system, K&B’s Quintuplet Porting, Flywheel designed for cup electric starter, and Underwater Pick-up.

*lf it were any larger we could not have gotten it on the page!

Additional • Propeller Shaft Assembly Features The prop shaft assem­ Include: bly and mating part of the lower end casting is thread­ • Con Rod ed for ease of replacement Machined from high of drive cable or prop shaft tensile strength assembly . . . eliminating the aluminum stock. need to disassemble the lower end. Bushed at both ends. • Mounting Hinges Slotted for up • Heavier and down engine adjustment. Wall Sleeve Harder and stronger- brass • A Long Skeg For increased stability. alloy minimizes distortion • Built-in Silencer Decibel reading can be low­ during machining as well ered to as much as 80 decibels with the insertion of as during running. baffles (five furnished with engine) into the exhaust • Honed Piston chamber. Honed after the grinding operation . . . resulting in a perfectly round piston that automatically extends the 3 life of the ABC piston and < D cylinder fit.• • K&B’s own K&B MANUFACTURING Super Bearings a division of leisure dynamics hobbies, inc Developed by our R&D — will withstand 30,000 R.P.M. plus, without shedding ball retainers. 12152 WOODRUFF IVE.. DOWNEY. Cl 00241

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Sport Scene .. Continued from page 33 the Tee Dee or Pee Wee. I suspect that Choppers .... Continued from page 21 the model would be a pleasant sport F/F with the Pee Wee, and could fly in .020 box, the belt tensions seemed to be too the line, congratulations on a job well OT with the Tee Dee. Plenty of room for loose. The large belt deflected 6 mm, done! a modern radio, be it digital or pulse and the small belt deflected 3 mm. I FOLLOW-UP proportional. tightened the belts to 3VŽ and 2 mm Last month I wrote at some length on Whoops, we left the wings off the next respectively. During the first several the subject of spray finishing techniques one! Dumas has a lovely line of sport hours of running, the belts will stretch, with spray cans. I neglected to empha­ boats, such as this Coast Guard 4T Utility so m onitor them and take up extra slack size one item adequately. It is vital that Boat. In the background is a 15 inch when they start to loosen up. There are you shake the bejabbers out of a spray model, and in the foreground a 31 inch others running belts looser than I am can before using it. The pigment tends version. Since there is no regular com­ running mine, and they have not had to lump and collect in the corners of the petition for models such as this, I figured any problems either, so the belt tension can. You will get lumpy finishes, thin they fit pretty well in the Sport Scene. looks like it is far less critical than on a Jet finishes, clogged cans and nozzles, and a Final photo(s) show an interesting Ranger, for instance. very high level of frustration if the paint pusher, canard 1/2A R/C model. While The gear flanges are nicely beveled to is not adequately mixed by lengthy wandering around Mile Square one day allow the belts to “ flow ” on to the gears. shaking of the can. When they say shake with camera in hand. I came across this This prevents belt chafing and eventual for one minute, do it and time it to be peculiar aircraft. It is an original design failure. So far I have had no belt prob­ sure. A minute is a surprisingly long time by K. Phumirat. Power is by Tee Dee .051 lems at all, they are suited well fortne .50 as any indoor glider flier can tell you. with a left-hand, Tornado prop to make engine being used. There is one spacer (An occasional reshake during applica­ to the wind go the right direction. on the engine that I would bevel off, tion doesn’t hurt either, wen) Weight came out around 20ounceswith refer to the photos for a detail of this. PHOTOS an EK radio. Wings are Ace tapered foam LANDING GEAR Got lots of good pix to present this panels, remaining construction is mostly It is of conventional design, made month, so let's get at it. First up we have balsa. Note that the canard has hinged from one-eighth inch aluminum, with Ron Lowe with his Warlock .05. Ron is a elevators for pitch control. Landing gear aluminum skid tubes. I added the bass­ friend from my days at Cox where he was is tricycle, with the nose wheel way up wood skid caps as shown. I’ll describe an one of the designers. Ron had extensive front, and the mains about the center of easy way to make these in a latercolumn. involvement with both the U/C and the wing root. Phumirat said that he If you are just starting helicopters, or more recent R/C RTF aircraft and car trimmed the model out by trial and are at a point where you still can’t set it projects at Cox. The Warlock is in bright error, but it wasn’t very difficult. Balance down perfectly, do not use the stock yellow Monokote and sports a Tee Dee came out about 1/2-inch ahead of the skids. Due to the rather high C.G. of the .051. Ron is mostly turned on by racing wing root leading edge. Hughes, it is susceptible to lateral tip (would you believe NIGHT 1/2A Pylon Naturally, I stuck around for a flight, over, with corresponding conse­ racing with LED’s on the wings to track and was rewarded with the opportunity quences. One good cure is to fashion a the models?) so he mostly practices low, of seeing a perfectly smooth-flying and temporary training gear out of two clean pylon turns. But the model has maneuverable aircraft perform. aluminum yardsticks that can be pur­ demonstrated asmooth maneuverability In closing for the month, why don’t chased at most any hardware store. in aerobatics too. we put together a “What the World These have enough strength to support Second aircraft is unnamed. The Needs Mk. Ill” list. Send me your ideas the weight of the helicopter, yet they person holding it isn’t unnamed, how­ of what you wish were available, I’ll add w ill give with a hard landing. Just replace ever. he is Roger Newbold, who is an some of my own, and I’ll publish it. I the regular struts with the aluminum engineer in the toy division at Mattel. think some good came of the one from yardstick bows (bend them by hand so The model is constructed with ACE last year. See you next month. the helicopter sits several inches off the foam wingsand hasa mind-boggling roll P.S. I have requests from readers for ground) and use the standard skid tubes. rate. As you see, the wing has some more information on the “ Red Tailed In the photos, it shows the skids posi­ rather sizable ailerons. Control is by Duck” by Jim McDermoth and the tioned fairly far forward. If you fly off of aileron and elevator, engine isa Tee Dee “ Taube” by Greg Davis of Canada. grass, the helicopter will have a ten­ .051 running on pressure fuel feed. Anyone who might have their addresses, dency to settle in tail first, so move the Third aircraft is one seen at last year's please send them to me so I can pass skids farther back for more aft support. If IMS Show. Midway Model Company them along. Thanx! · the skids protrude about two inches puts out this lovely scale-down of Berke­ back from the aft strut you will not have ley’s 1937 vintage "Cavalier". The model a problem with settling backwards. was done in 1:3 scale to come out with 36 MAIN ROTOR SHAFT, inch wingspan. Power is by Cox .020, but TAIL ROTOR DRIVE SYSTEM I can't make out or recall whether it was The main rotor shaft, 8 mm in diam-

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eter, is supported by upper and lower The input bevel gear to the tail rotor has The tail skid is a single piece of wire, ball bearings, adequately spaced and two bearings and the tail rotor shaft is and is good for display; If you have a allowing smooth operation of the shaft. supported by two bearings, see the habit of giving aft cyclic upon touch­ The main shaft can be easily removed for photos for all of this. The driveshaft itself down I would recommend that you replacement by loosening the bottom is not held in place with set screws, but reinforce it with additional wires. These gear, a set screw or two, and the wash­ has flattened ends and slides into the fixes are common knowledge and I out control. gear shafts like the Kavan drive shaft won’t go into details here. The tail rotor drive is bevel gear driven systems. This system is exactly what I was TAIL ROTOR, MAIN ROTOR HEAD throughout, with a take-off from the describing a few months ago. and I was The tail rotor blades are wide and main gear similar to that of a Heli-Boy, pleasantly surprised when I opened up long, but with the stock pitch change but personally, I like this design better. this assembly and found this method of system, the tail rotor control is poor. In The gears are heavier and will not strip as tail rotor drive. The entire tail rotor drive fact, it isstill “ soft” with all the throw you easily if the tail is dumped in the ground. system is as smooth as silk and very can get from a standard servo. I devised a When setting the tail boom to the side trouble free, while it is still easy to quick fix for this by using a bellcrank frames, it is important that you take time disassemble and replace pieces should a arrangement which completely elimin­ to set the backlash so you can feel just crash occur. The entire tail boom is ates the inadequacies of the stock the slightest bit of play between the two supported by two stainless steel braces system. Now tail rotor action is smooth gears. Too much play will prematurely which gives a strong aft end. and firm, and can be easily adjusted to wear out the teeth, and no play will cause binding, uneven wear, and vibra­ tion. As the surrounding black tail tube INTRODUCING THE NI-STARTER® $19.95 Retail holders are tightened, the backlash may A new and completely revolutionary concept of power for change depending on how you tighten glow plugs model cars, boats, airplanes, helicopters, the bolts. I found it best to set the lower anything using the 1.5 volt standard plug for glow engines. front bolt In the bottom of its slot, snug it Rechargable, (up to 1000 times). Rugged construction, fits up, then tap the rear blocks up or down in your pocket, works sideways or inverted, fits through as necessary, using the front bolt as a cowlings, heavy duty nicad power, many, many starts from pivot point. To get this just the way I just 1 full charge, uses New Head Lock plug adapter, wanted took 20 minutes; don't rush and stays on the plug, not in the propeller. Instructions included. do half the job. This charger will charge 100ma & 250ma. 4.8 V fit. pks. The tail boom is your standard alu­ Over 50 consecutive starts without recharging (40 engines minum tube with a foam insert halfway & 10% fuel). 90 day guarantee, after that, with normal along the length. The front bevel gear usage, we will repair or replace (or $5.00 up to one full year. McDaniel R C Service (to the main shaft plastic gear) is held in See y o u r d ealer o r c a ll u s — Bank cards accepted. C.O.D. 13506 Glendundee Or. place with two ball bearings in a neat okay, you pay shipping. Distributor & Dealer inquiries Herndon , VA. 22071 invited. plastic housing. The arrangement is (703) 435 - 5805 similar to that in the tail rotor gear box.

MARCH 1982 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YO U! 75 your personal taste. Details and photos Hiller system, whichever you prefer to next month. call it.) The paddles are slightly different CURACAO MODEIBOUW The symmetrical tail rotor blades from usual, in that they have air ducts come uncovered and are beautifully through them. I have not had time to laminated. They are semi-fuel proofed really experiment with them, but they with dope. I have since covered mine feel similar to a fairly heavy, medium with Fas-Cal, which completes the fuel thickness wooden paddle. If you desire proofing and avoids leading edge abra­ crisper response you can put on a pairof sion at the tips if they strike grass or the Heli-Boy paddles and the control reac­ ground. tion as well as effectiveness will increase. The main rotor head is nothing exotic The Main rotor blades are laminted to look at, but the combination of from five pieces of wood. The two front aluminum and plastic used makes it leading edge pieces are hardwood, and relatively easy to set up and maintain. the three trailing edge pieces are balsa. Not only is it easy to set up, but it stays set This construction gives a rotor blade that up better than most of the commercial is not only attractive to look at, but quite collective heads. The aluminum side strong and resistant to in-flight flutter. frames are nicely polished, which sand­ The airfoil section is semi-symmetrical. wich the plastic blade axle holders. The blade covering supplied with the kit (Don't tighten the four mounting bolts is a transparent, heat shrink plastic too tight, lest the axles bind due to the sleeve which is slipped over the blade squeeze.) These feathering units have an and then shrunk into place. I have mixed outer and an inner bearing which sup­ feelings about this material. It is quite ports the axle itself. They are smooth and strong and resistant to tearing, which is absolutely slop free, which aids in the good. But if you shrink it with too hot of set-up of the head. a heat source, it will not stop shrinking, The pitch change arms are keyed onto and you can turn a perfectly good blade the blade axles, and can not shift posi­ into a pretzel. The instructions recom­ tion. One bolt holds the pitch arms in mend holding the blade over a teapot the keyed position. If you need to and using steam to shrink the covering. I Complete catalog showing modeltypes of replace one the set-up stays the same, used me w ife’s hair dryer to do the handmade oldtimers and pricelist will be and it takes two minutes to do so. shrinking. It has a "dry” and a "style” sent to you on receipt of USS 4 .- to cover airm ail charges Irefundable w ith order). The flybar is a one piece rod that slides setting, I used the "dry” position. This through a plastic block on top of the produces enough heat to shrink the CURACAO MODELBOUW head. The flybar is retained by set screws material over the blade, but not enough on either side of the block, and the to pull the blade out of whack. Essen­ c/o Fred A. Engelage entire block/flybar pivots for Hiller tially, steam does the same thing, but I 2613 Golf Drive, Palatka, FL 32077 control. The Bell control goes directly to didn’t like the thought of all the humidity Phone: (904) 325-5005 the blades. (The head is a Kavan or Bell/ around the blade. (Others have used

76 WHEN CON TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER steam with good results.) The blade bled. It is small, 3/4 x 5/16; and lightweight, INDOOR MODEL SUPPLY covering has a very low shrinking thres­ at only a few grams. It plugs in between the OUTDOOR l INDOOR FL YERS FOR THE NOVICE hold, and an iron or a heat gun w ill melt receiver and the servo whose output you SELECT SATIN SMOOTH SHEET BALSA it. Do not try to shrink the covering with wish reversed, there is no tuning or adjust­ Yard Birds W S p a n 3 IMS Glider*

BIG BEAUTIFUL BOATS! These boats are designed for the air-cooled Industrial Version of the QUADRA. $139.50. which comes complete with gas tank, pull-rope starter and engine cowl Other 2-cycle gasoline engines can be used.

J-5 PICKLE FORK HYDRO UNLIMITED J-5 HYDRO UNLIMITED J-5 THUNDERMARINE 6 foot 5 inch long by 3 foot beam mahogany 7-foot long by 3-foot beam mahogany plywood 50" of snarling speeding, fiberglass hull plywood kit A spectacular sight on the water boat kit. This Tunnel-Hull is a thrill to run on the capable of running in-foot waves Get in on the giant R/C Boating Fun water and a thrill to watch All wood kit$149.S0 Deep V design with 20" beam Fiberglass hull All wood kit 169.50 Above kit c/w J-5 DRIVE-TRAIN $219.50 and deck kit with ply m otor mount and silver Above kit c/w J-5 DRIVE-TRAIN 239.50 deck moulding $139.50 J-5 DRIVE-TRAIN includes clutch to fit Industrial QUADRA, Above kit c/w J-5 DRIVE-TRAIN $209.50 flexible coupling dia steel propeller shaft, bronze bearings, Shipping Charges 5 ENTERPRISES shaft casing with strut brazed in place, rudder with %" dia Included in U S & Canada 0 Box 82 B elm ont O ntario NOt 180 rudder bar and 2 bronze bearings, control arm. mounting plate, Dealer Inquiries Welcome P 0 Box 8 North Street. Michigan 48049 all necessary bolts and nuts, collars and drive-dog $99.50 Phone 1 519-6440575______

MARCH 1982 WHEN CON TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 77 chemistry, metallurgy, stress and vibration PRESENTING THE OCTURA analysis, circuit analysis, and many others." It goes into great detail about the prob­ lems involved in getting the maximum life out of a switch, and states that, "as a rule, the lower the current, the longer the switch life." For our use, we can also add, "the longer the life of the airplane." It would ap­ Almost as quickly as you can say: "Swift-Switch" pear that for those high currents used by our CHANGE FROM A .60 TO A .45 ENGINE OR VICE VERSA electric model aircraft power plants, and to WITHOUT REMOVING THE ENTIRE MOUNT FROM H U L L - keep weight down, what we need is a small THE INSERT ON WHICH ENGINE IS MOUNTED!!! servo-actuated Micro Switch, which in turn controls one of the solid state switching devices to handle the higher current. If anyone has done any experimenting along those lines, how about sharing with us? SWITCHES O.M.T. In the parts list for electronic how-to articles, you will often run into: Switch, SPST, DPDT, or something similar. The let­ ters describe the physical characteristics of the switch, in terms of POLES, and THROWS. The term POLE denotes the number of completely separate circuits that Features a minimum of parts. Strong, the switch can control, while THROW light, extruded aluminum one-piece base denotes the number of different circuits that and one-piece insert. 5' wide. Inter­ each POLE can control. A combination of (Engines changes with Octura 5-55 and 5-60 Motor POLES and THROWS thus makes up the Mounts. Ideally suited fordeep-vee huils. not Insert is deep enough to accommodate included) more complicated switches that are used 65 engines. for transfer operations in other than simple Price:S16.OOper assembly (incl. one insert). Additional inserts$6.00 ee. Inserts sized, drilled On-Off circuits. The more common ab­ and tapped for the more popular marine engines:$8.25 ea. breviations are: Order directly only If not available at your local hobby dealer — SPST—Single Pole, Single Throw add 10% tor postage: Illinois residents add additional 6% for sales tax. SPOT—Single Pole, Double Throw send $1 for catalog OCTURA MODELS, INC. DPST—Double Pole, Single Throw and price list to- DPDT—Double Pole, Double Throw 7351 N. Hamlin Ave · Skokie, IL 60076 There are more complicated multi-POLE and multi-THROW switches also available, which are just physical extensions of the centers, I didn't find a single one that in­ SWITCH TO RELIABILITY above, though, we don't see much of them cludes Sanwa in its list, and that includes Last month I talked about switches, their in R/C equipment. In general, we can think Don McCarthy at Authorized R/C who I use and misuse. Some time afterthecolumn of a SPST switch as being required to sim­ always thought could fix anything. But of was complete and submitted to Model ply turn something on and off. A SPDT course, without parts and technical data Builder. I received a book sent to me throw is used to transfer something in a cir­ from the maker or importer, even the best through the courtesy of Micro Switch, the cuit from one point to another. A DPST company whose name has become technician in the world cannot properly switch turns two parts of a circuit on and service a particular system. synonymous with plunger-operated preci­ off, while a DPDT provides transfer func­ I happen to have some not-too-clear sion switches regardless of who makes tions between two points. The accom­ them. The book is entitled "Applying Preci­ Sanwa schematics in my collection. They panying sketches should make the whole sion Switches," is written by a Mr. ).P. are labeled "6 Function 72-76 MHz thing easier to see and understand. Lockwood, and covers in great detail what Transmitter," "4—6 Function Receiver," There are a couple of other descriptive and "SM-311, SM-312 Servo." If you have I tried to condense for our application down terms used in specifying switches. One is need for a set, drop me a SASE d o Model to ten column-inches. It confirms what I BREAK, which indicates the number of con­ wrote: "The application of precision Builder. And if you know of someone tacts involved in each switching operation. switches is an intriguing technical subject. capable and willing to service these If the switch breaks thecircuit in one place, systems, let us know so we can pass the It draws upon many disciplines, including it is a single BREAK switch; one that breaks word along. solid-state physics, plasma physics, physical it in two places in a double-BREAK switch. In rotary switches, you will run into MAKE BEFORE BREAK, and BREAK BEFORE MAKE. The former means that in a transfer type multi-throw switch, the circuit being FLY EL • transferred is connected to the new contact before being completely disconnected from the previous one. In the latter type switch, • VL-I01 Electric propulsion system the original connection is completely open shown— using Hytork 48 motor and and floats momentarily before switching to planetary gear box, SJ-3 switch & the new contact takes place. We don't often charging jack, and B-33L fast charge run into these specs in the switches com­ ni-cad flight battery— total weight monly used in the R/C hobby, they are men­ Z ' / i o i .— will power models 25 to tioned only as a matter of general interest. 50” wingspan weighing up to 10 oz. Enough of this subject, let's "switch" to • Send 50c for latest catalog showing something else. fu ll line equipment & accessories. V L PRODUCTS Division of Vista Labs PARTS AVAILABILITY • Hobby dealers send for information. A couple of months ago, I told you about 7871 Alabama Avs.. No. 16 Canoga Park, California 91304 a few of my favorite suppliers for things elec­ tronic. Now, I want to put you to work to

78 WHEN CO N TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! MODEL BUILDER Authentic 1/7 Scale BYRON A-4 Skyhawk ORIGINALS

Powered by the Patented B yrgjet Ducted Fan!

ARWES

Wing Span Wing Αιοβ ...... Win« Loading Length...... G8 ” Ready to ffy woight .9 Ó lbs (with retracts . . . lOVi iba.J Channels...... 4 (5 w tv tracts! P o w e r...... Schrmerfe ported 60s & Bvro Jot (No high nitro funis requiredi

Kit includes extensive decal Exclusive plug in wings and sot to finish off both models os aileron linkages for quick and shown. easy transport True Value in a "Com plete Kit Concept

aged with our "complete kit concept" in mind v While other manufacturers are content to offer you only semi-kits. Byron Originals does a whole lot more. Every item needed to complete the model, except fan unit, engine radio, paint and glue, is included. In addition to the latest state-of-the art construction methods and materials, this A-4 package offers you an impressive list of scale appointments. They include a highly detailed fiberglass fuselage, canopy avionics cover and rudder, plus scale strut assemblies, landing gear pods, cockpit interior, extensive decal set and optional drop tanks. Exclusive plug-in wings and aileron linkages for quick and easy transport are just a few of the many unique A H:'idandard features. Retracts can also be easily incorporated for added scale realism. NAVY NAVY3733 MAR1NESMARINI Flight characteristics are just as impressive. Powered by our proven Byro-Jet fan and tuned pipe system, the A-4 is a true scale performer. The patented Byro-Jet promises plenty of power reserves for both hard surface and grass field take-offs, including the usual aerobatic Retail value - $292.00 Send $2.00 for complete manuevers. All things considered, the A-4 Skyhawk from Byron Your cost - $248.20 A-4 Information ^ack Originals is a masterpiece of modern modeling technology.

Byro-Jet Tuned Pipe System A-4 kits are now in stock and ready for immediate delivery* Byro-Jet's exclusive quick start capabilities makes engine starting _ A-4 Skyhawk kit(s) at $248.20 ea. plus $8.50 shipping & handling fast, easy and safe. No complicated belt start procedures and no hatches to remove and re assemble. Simply NOTE: In order to receive __Optional drop tank kit(s) at $25.46 ea. (includes shipping & handling) attach the starter extension to your Sullivan proper Pipe System and Byro _Byro-Jet ducted fan(s) at $53.08 ea. plus $2.00 shipping & handling. Jet. determine engine to be starter, insert the assembly through the tail w\ __Complete tuned pipe system(s) at $57.22 ea. plus $1.75 shipping & handling. pipe until contact is made with the used and check accordingly. rotor...and hit the starter ** _ Starter extension(s) at $ 14.03 ea. (includes shipping & handling) Webra .61 speed #1030r. ex.-f. val. .O S. Max .65 RSR s. ex.-r. val ___ H.P. 61 gold cup s. ex r. val. .Webra .61 speed # 1030s. ex.-f val. .Rossi .65 ABC r. ex.-r. val. ___ YS FR .60 f val..-r, ex .O S. Max .61 VFr ex.-f. val .Rossi .61 ABC r. ex.-r. val. ___ Undrilled engine mount O S. Max .61 FSR s. ex.-f. val. Webra .61 speed #1024 s. ex.*f. val__ O.P.S 60 & .65 RCA r. ex.-f.&r val O S. Max .60 FSRs ex.-f. val. Webra .61 speed #1024 s. ex.-r. val__ O.P.S. .60 RCA s. ex.-f. val Name Street or RFD State In addition to increasing I have enclosed check or money order for $ power output, this unique Byro Please charge to MC#______Jet Pipe System provides the neces- sary noise suppression and the means to VISA# ______Exp.______completely conceal tuned pipe within fuselage. Avoilable for both side and rear exhaust 60 engines. Iowa Residents Add 3% Sales Tax. Prices Subject to Change Without Notice Send to: BYRON ORIGINALS. P.O. Box 279. Ida Grove, Iowa 51445. Ph. 712 364-3165 Telex 439012 IDAG Complete 2 and 4-channel Kraft R/C systems KP2K& for the beginner and experienced model airplane, glider, boat or car hobbyist- featuring ... KP4K... ■ Sensitive 3 microvolt voltage stabilized receiver 2 & 4 Channels ■ Fast response, low current-drain servos ■ Dual neutral positions, left stick (KP2K) ■ Precise trim controls of Kraft ■ NiCad batteries & AC charger (KP4K) ■ All 72-75 MHz frequencies available Control at Start off your new hobby with the best - a Kraft R/C system-high performance at a budget Budget Prices price. ffla n -

Now Featured at your Local Neighborhood Kraft Dealer KraftSystems, Inc. · 450 W. California Ave., Vista, CA 92083 · A Subsidiary of Carlisle Corporation LEISURE FLIGHT SYSTEMS MORE POWERFUL THAN AN ASTRO 5 WITH TWICE THE FLIGHT TIMEI • Flight time of up to 13 minutes in a Kraft Cardinal. • Fantastic climb performance in powered Sail Planes ■ Goldberg Gentle Lady Midnight Models' Electrolite Craft Air Drifter Marks Models’ Wanderer • Excellent performance in Sportscale Shoestring · flies 7 minutes and does the full AMA “ A” pattern. • Full AMA “ D” pattern including inverted flight, outside loops & vertical rolls with Midway Models Fast Eddie Racer. LEISURE ELECTRONICS Send SASE for information. 11 Deerspring, Irvine, CA 92714 Sportscale Shoestring. 4 channel, weight 34 oz. Ph. (714) 552-4540

find more suppliers for us. Specifically, we without major surgery. In short, let's tell TML 35 engine, the all-plywood boat has need a source of 1% resistors; one that them our side, maybe the next system to a beam of 18-1/2 inches and a depth of doesn't have a minimum order to ten per hit the market will be more to our liking. 11 inches. Bulkheads and transom are of value, or $50 minimum. Quite often they I've mentioned it before, and I'll do so 1/2 inch plywood, 1/8 mahogany plywood are needed to achieve precision higher than again; our R/C systems are better than ever, sheeting and hatch covers, 1/2 inch square the 5% types can give, but you can't buy and relatively inexpensive for the quality basswood chines and sheers (stringers), the darn things. At least, I don't know and performance that is now available. But, and 1/2 inch plywood motor mount with where, so if you do, please let us all know. after all, we'veall been hit by the rising costs 1/4 inch plywood side rails. The )-5 drive Another thing I've tried unsuccessfully to of everything else, and need to look for the kit, including 1/4 dia. steel drive shaft, track down is an L200 Voltage Regulator, greatest possible value for our dollar. Yep, comes complete with a centrifugal clutch which I ran across in an issue of Electronics things are tough, my favorite cook men­ to ease starting and launching chores, and Design Magazine. It mentioned a source as tioned that the other day she was unable is a recommended accessory item. SGS-ATES, 70 Massasoit St., Waltham, MA, to find pumpernickle on the bread shelf The Hurricane is offered as a kit only but my letter came back marked "U n ­ down at the local market... all they have ($83.90), kit with drive train ($153.90), or deliverable, No Forwarding Address." is pumperdime! (That's enough, Eloy... kit, drive train, and engine for $273.90. J-5 The reason I am interested is that the L200 back to your quarters! wen) · Enterprises, P.O. Box 82. Belmont, On­ should make a great 12-volt glow plug sup­ tario, Canada NOL ΙΒ0, or in the U.S.. )-5 ply, needing only three other components Enterprises. P.O. Box 8. North Street, to do so. How much simpler can you get, Counter...... Continued from page 9 Michigan 48049. especially if it keeps the glow plug supply • · e voltage from dropping as the battery voltage * · * PAS-M-CO, of Kent, Washington, has drops when hit with the high loads placed The HURRICANE, |-5 Enterprises' latest plans available for the Bellanca Aircruiser on it by the starter. Deep "V " Offshore is a big 5-1/2 feet long, on floats! Done in one-inch scale, this I have read some criticism of such devices exciting racing boat, capable of plowing yields a model of 65-inch wingspan. Two being used to drop 12 volts down to the 1.5 through one to two foot waves! Designed sheets of plans, 3 by 5 feet, plus four, 11 needed by the plug as wasteful, and if you to utilize the Industrial "H obby" Quadra by 17-inch documentary sheets comprise believe Ohm's Law, they are. But Marez's Law says that if you are going to use something like this for seconds, and darn few of them, the fact that it is only 12.5% efficient is offset by the simplicity, and in turn, the reliability, of the device. None of my sources or cross references list an L200, possibly one of our readers in the electronics industry will know something about it, and a source. WHY DON'T THEY DEPARTMENT What about that last radio that you bought? After you sneaked it home, into an airplane, and in the air, did it do everything ANNOUNCES that you expected from it, or did it, in a man­ THEIR COMPLETE LINE OF PERFORMANCE ner of speaking, let you down? Did the box ACCESSORIES FOR also include some surprises, good or bad? TAMIYA OFF-ROAD VEHICLES We're interested, because we believe that the makers, some of them anyway, really NOW IN STOCK FOR IMMEDIATE DELIVERY care about what we want, and for our Aluméncm Wheels - Brass Gears - Dual Shock Mounts - Skid Plates mutual benefit, we'd like to mention in these pages more about what we buyer's Special Torsion Bars - Aluminum Chassis - H. D. Steering are looking for and expect. Available From: For example, is the manual clearly writ­ ten and complete? Are accessories included HOBBY MARKETING or readily available. Is there some physical 667 West 19th Street feature of the transmitter that you really Cotta Mesa, C A 92627 like... or dislike? Can you cycle the bat­ Orators 4 Cetnbutors mqunes welcome (714 ) 646-9273 teries without taking things apart... there is one transmitter you can't cycle at all

MARCH 1982 WHEN CO N TACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 81 NEW GOLD-N- SM000TH LANDINGS... Gasoline/Diesel Fuel PUSH RODS that hug the turf for Positive. No Bind Conversion Kit For Flight Control Sullivan Fuel Tanks SINGLE GEAR FITS NOSE OR Now you can use Sullivan tanks for your gasoline or diesel powered MAIN GEAR models. Write tor With our fuel conversion kit, you Free Fact Sheet can fill yourSullivan regular fuel gas tank with gasoline or diesel fuel. Save your money and check out our kit. Here's what you'll get: • 8" large BUNA-N tubing The push • 3 Barbed fittings rods that beat the clog. Pat­ Strong, lightweight, "REALISTIC” • 1 BUNA-N stopper ented splines on • 4 Nylon lock ties landing gears eliminate erratic vi­ inner rod cut right bration and feature short fulcrum Also available: through that mess. for ground hugging ability. Caster 3 ft. length of large BUNA-N Temperature compen­ tubing, 1/8" I.D. sated to prevent action. Adjustable pressure. Easy to 3 ft. length of medium BUNA-N elongation. Good as gold. customize. Four sizes to fit wheels tubing, 3/32" I.D. Insist on Gold-N-Rod. from 1 'k to 3". Ask about our '/* scale Clevis not included. tail gear.

WARNING To All Modelers Do Not Fly Near Overhead t i l l i v Power Lines PRODUCTS, INC. 535 OAVISVIILE ROAD · WILLOW GROVE. PA. 19090 · USA (215) 659-3900

ATTENTION % SCALERS high and rated at 500 pounds P.S.I., the Molex battery connectors are included just EPOXY GLASS COWLS FOR; PANAPRESS is ideal for assembly, bending, in case your system uses an off-brand bat­ NOSEN PICA StD MORGAN BAiSA USA PLATT CONCEPT forming, inserting sleeves, pressing bear­ tery connector. All these features from ELECT HOSTETLER R C M T C RAFT SHE BE R PITTS 'N b % Astro Flight, with a one year warranty, for SCALE SUPER CUB f OKKER D 7 BOEING P >2 P-26 F4B2 ings, punching, riveting, and trimming. The F4B4 SPARROW MAW A GEE BEE MOO Y MAC BRIENS angle of the operating lever can be ad­ only $59.95. For more information and TURBULENT CHRIS TEN EAGLE B R lS lG H E lL A S STAROUSTER II v* SCALE J3 BI BABY FL YBAB y AIRCAMPER PILOT justed quite simply, too. Just raise the ram product listings, send a SASE to Astro JUNGMAHN I 3 5 SCALE b OTHERS to its maximum height, then slowly rotate Flight, Inc., 13311, Beach Ave., Venice, the gear with the operating lever. Recheck Ca. 90291. WHEEL PANTS FOR: * * * CITABRIA STAROUSTER II PIUS SKYBOL1 LIBERTY SPORT the pressure position and repeat until the CHRISTEN EAGLE P 6 E HAWK STEARMAH STINSON SR 9. MULLIGAN b OTHERS desired angle is obtained. Four counter­ Ace R/C,· Inc. has announced its latest sunk mounting holes are cast in the base two options for the Silver Seven Transmit­ BRAZED b HEAT-TREATED WIRE GEARS €» CABANES LARGE SCALE PLANS AVAILABLE for easy attachment to any work surface. ter. These, along with the Exponential Rate Send S A S E tor latest list For more information, contact; Panavise kit (#11G500), Electronic mixer (#11G505), We supply Modelers with fiberglass parts for your Products, Inc., 2850 E. 29th St., Long Exponential Rate/Mixer (#11G515), and Beach, Ca. 90806. Programmable Push Buttons plans— Write or call us * * * T ft D FIBERGLASS SPECIALTIES (#11G510-11G511), give the modeler a 30925 BLOCK GAROCN CITY Ml 48 <35 From BoLink. comes an Indy body that wide choice of control functions for his PHONE (313) 421-6358 works as well as it looks. The Pennzoil model applications. The #11G510 Chapparal 2-K Indy car is here at last. This CAR + DIF. AIL/EPA option lists for $12.95 this plan packet for only $35.00. Drawings is the car that Johnny Rutherford drove to while the #11G525 CAR + DIF. Ail. Add-on were supplied by Mr. D.E. Anderson, of so many victories. If you are looking for a sells for $9.95. These items are kits. The Canada, who did the drawings supplied to Concours body to paint, look no more. CAR + DIF AIL. Add-on was used by the Canadian Aviation Historical Museum. This car is beautiful. Dwight Holley on his 'Gobbler' to help The particular aircraft used for this A wing (that really works) is molded in­ him capture the title "W orld Soaring plans/model was used by the Canadian to the body, along with long side dams to Champion" in 1981. Some of the features Pacific Airlines. add to its stability. The stock number for of these add-on units are; differential All cockpit detail, instruments, seat belts, the Chapparal is BL-2092 and is available ailerons, coupled ailerons/rudder (switch shoulder harnesses, control wheels, foot clear at $10.95 and painted for $15.95. A controlled) and end point adjustments. pedals, throttle quadrant, trim wheel, and complete catalog is available by sending Write to Ace R/C Inc. for information on fire extinguishers are detailed. Plans may $2.00 (refundable) to: BoLink Industries, these and other custom options for the be ordered from; PAS-M-CO., 25260 153 420 Hosea Rd., Lawrenceville, Georgia Silver Seven Series. Enclose $2.00 for the Rd., S.E., Kent, Washington 98031. 30245, Phone (404) 963-0252 for more complete catalog detailing the above * * ♦ information. items. Ace R/C Inc., Box 511, Higginsville, The PANAPRESS, a precision tool from or digital multimeter. The Astro Power Mo. 64037. Panavise, is a small arbor press, designed Connector (supplied) plugs into all Astro * * * for exerting controlled pressure with close aircraft, automobile, and marine systems, Now, from Steve Muck's R/C Boats, the directional tolerances. Just seven inches and as an extra bonus, an extra pair of first of a series of yesteryear 1/8-scale

82 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER hydroplane kits. The first to be released is stall some minimal range instrumentation STERLING MODELS1 kit #102, a replica of the Ted )ones/Les to allow automated launch and landing for Staudacher 30-foot round nose, slab side, beginners, with perhaps a landing assist Priced Right For ’82 built in the late 1950's and early 1960's. made for experienced pilots operating This kit will build up to 75 different un­ under very turbulant conditions. Say, 'Real Sporty limited hydroplane paint schemes. wouldn't it be nice to have an accurate The hull is in white gel-coat fiberglass knowledge of what your plane is doing in resin with the deck factory joined. The kit speed, height, and the individual includes one rear cockpit cowl, either low maneuvers? Aerobatic contests could then or high back. The hull is 45 inches long, be judged in terms of the read-out that 20-1/2 inches wide, and comes with a shows exactly what happened. detailed, step-by-step, instruction manual. Going beyond this begins to read like Also available are other accessory items, science fiction! Why not have self­ such as dummy Rolls-Royce and Allison diagnostic radio equipment... not only to engines, steering wheels, windshields, and tell the technician what went wrong, but Kit: front cowl covers. There is also available, to identify and correct pending weakness? Wingspan: 40-5/16 a hardware set, #68, to fit the hull. If this Hey, why not build some artificial "con­ Scale: 2-1/8 kit is not available at your dealer, order sciousness" into your electronic equip­ Price: $45.95 direct today. A complete catalog of ment? That is, have it model itself and For: Radio Control 1/8-scale kits is available for $1.00 from reference that model in a way that makes Control Line (.15- Steve Muck's R/C Boats, 6003 Caven it self-aware. You might then ask it questions .25 Engine) Oakes, Dallas, Texas 75248. about its capability and even how it "feels" in a more general sense. But, there’s a danger here. You see, Soaring...... Continued from page 29 there's a close proximity between con­ sciousness and conscience. At what point might the electronics begin to generate its other transmitters. Short signals rapidly own goal and become self-serving? How repeated may be in time sufficiently redun­ would you like your plane to generate pur­ dant to overcome the remaining in­ poses that differ from those you want it to terference loss. have? You might even have to negotiate the In the future, you can program your next flight... and if it didn't like the way you transmitter to replay your favorite treated it, it might just fly off in search of Kit: K7 maneuvers, such as axial roll, Cuban- another "master." With rechargeable solar Wingspan:33’ eight ... and even launch and landing. First cells and automated landing as a Price: $24.95 you record your stick movement as a func­ background capability, a random mutation For: Radio Control tion of time after starting the maneuver from might introduce who knows what. (Who's Control Line ·°·^ cnB· a standard entry altitude and velocity. If you to say we aren Ί all a bunch of runaway com­ Free Flight (Rubber didn't like that performance, erase it and puters! wen) Power) read in your next try, repeating this until you And there are social trends in our sport, have that set of maneuvers you want to but I'll leave these for the next issue. Penny Pincher Gliders repeat at the "press of a button." A more * · · sophisticated transmitter might allow you Hi—Hellcat I see renewed interest in military decor H2—Mustang to enter real-time adjustments as an over­ and finish. For example, John Lewis of San ride to your recorded program, and with Diego, California, has "militarized" his H3—Piper Cub sufficient onboard sensing, the airborne Wanderer. It really looks like an RPV H4—Cessna 180 pack could take care of these adjustments (military designation for Remotely Powered H5—Sabre Jet for you as the maneuver proceeds. Why not Vehicle). In addition to the silver covering H6—T38A Thunderbird let the airborne pack help you reduce the and appropriate trim, he incorporated effects of turbulance, imbalance, and inac­ properly pulsing red/green wing tip lights Wingspan: 13 curate initial conditions? and a tail light. He can now fly on the slope Price: $1.98 With still greater electronic sophistica­ lift well past dusk or use a high start in the tion, your radio equipment might monitor Full Color Covering inclu­ dead of night. He plans to incorporate a ded! Handsomely detailed your performance and learn to adapt to strobe light that would increase his range just like the real airplanes. your idiosyncracies. You indicate your in­ of operations. There may soon be a new You’ll Fly Everyday! Just tent, maneuver by maneuver, and how you wave of UFO reports, but you'll know put your 21 in the nose for liked that last maneuver. Your what's really happening! weight. microprocessor takes all this to "heart" and Ron Leon and Bill Slining, of Costa Mesa, helps to make your next attempt more California, have been flying different ver­ Catalog Request pleasing. It might even correct pilot error sions of a militarized Spiteful... a sixty-two- before the damage is done. An airborne inch span flaperon/elevator controlled STERLING MODELS BUILDING altimeter could correct for any inadvertent aerobatic ship. They prefer using an elec­ 3620 "O” Street low altitude dive at the ground. tronic mixer. The all-up weight is thirty-two Philadelphia. ΡΛ 19134 Automa‘ed dynamic soaring is a real ounces. possibility... extracting energy from the John Schwinghamer, of San Diego, con­ Catalog of entire line of vertical turbulance by maintaining a nearly verted a Midwest A-4D ducted fan Skyhawk airplane control line model constant angle of attack. You might even for slope soaring. This thirty-six-inch span kits, R/C scale and Trainer ask your plane to perform the "Albatross weighs only 15 Vi ounces. It looks authen­ Kits, boat model kits, ac­ maneuver" (flying an inclined eclipse that tic and is a pleasure to see at Torrey Pines. cessories etc. SI.00 enc­ extracts energy by averaging over the wind- Murph Misewicz prefers historic military losed. shear). Here's a great way to get really long scale. During World War 11(1942) the Army Name__ duration flights. Air Corps purchased 110 TG-3A trainer Address. It might even be possible to introduce a gliders from the Schweizer Aircraft Com­ collision avoidance device that would pany. Students received six hours of train­ C ity ----- reduce the possibility of mid-airs in dense ing in this dual-control plane before being .S ta te __ -/'•ip ■ traffic slope soaring. You might want to in­ trained on the larger CG-4A cargo glider.

MARCH 1982 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 83 LOOKING FOR SOMETHING REALLY NEW IN A SAILPLANE?

M U I T t P U X FLAMINGO

Excellent for FAI-F3B competition and all around flying as well as Thermal duration. Proven design.Quality of kit must be seen to be appreciated All instructions in in english. Airfoil. Eppler 193 Span 100.4 Epoxy glass fuselage Built up wings and tail group—Ailerons standard (Spoilers and/or Flaps optional). If this ship was marketed through regular Distributer/Dealer network you would pay $225.00 plus for this kit— However because we are the importer,we can pass a considerable saving on to you.the soaring enthusiast.

F.O.B. Red Lion.PA.

Send $3.00 cash,check or money order for our Fully Illustrated 1982 catalog.

ö fie δα ι/píane f a c t o r y m

P.S. Come see our displays at the 1982 WR AMS & TO LEDO shows. —■

plane according to Jack's plans, and as by being there! "ANOTHER GREAT WINDER" predicted, it weighs 73A pounds. Here is a "Nowadays it costs more and more to very realistic military sailplane. A lot of work travel and attend contests, so I volunteered went into its construction, but it seems well to host one of the contestants... Ken Scholl, worth it. it handles nicely and is very predic­ of Douglassville, Pennsylvania, who flies a table. In fact, I suspect it feels very much Maestro. We had oodles to talk about. I List $56.25 like the full-scale original. Murph used learned a lot, and he saved the cost of a Plus shipping yellow and blue Coverite, and the proper motel. Most of the competing sailplanes insignia to go with this realistic dull finish. were built from kits. I'm less impressed with * * ♦ these pilotsthan those who demonstrate an JOHN MORRILLS "SIDEWINDER" If you’re a contest addict, you'll ap­ ability to design and build from scratch. preciate a new convert. If you've never at­ Each contest should include some points Precision Built Heavy Duty Winder! tended a contest, you'll enjoy the perspec­ for this aspect of modeling. tive offered by Coulter Watt after his first "I watched Dwight Holley fly (the win­ $1.00 FOR CATALOG experience. "I've just participated in my ner of the recent Internats) and question­ very first contest, the Fourth Annual Empire ed him after each landing. His Eppler 205 JIM CROCKET REPLICAS State R1C Soaring Classic. There they wing is equipped with flaps that go all the P.O. BOX 12600 were... 80 beautiful models glistening in way from minus 5° for speed to plus 20° FRESNO. CA 93778 the sun. It was breathtaking. It's clear that for extra lift while thermaling. The clean a soaring contest really tests each pilot's uncluttered fuselage was beautiful. The The wings were of spruce and mahogany skill. You try for a perfect score rather than 1/64th-inch plywood sides are fixed to the plywood covered with doped fabric. The to defeat the other pilots. You must take into finpost and extend past it. The rudder fits fuselage was a fabric-covered framework of account the weather conditions, the terrain, into this vertical slot. The built-up wings welded chrome molybdenum-steel tubing. and many other factors that affect your were fully sheeted with 1/16th-inch balsa It had a single unsprung disk-braked wheel. performance. and careful sanding achieved the desired The controls consisted of rudder, elevator, "If you've never been to a contest, go and airfoil. The flaperons were electronically ailerons and spoilers. The span was fifty-four watch what happens. You'll see a lot of mixed, as were the rudder and ailerons. feet, length twenty-seven feet, seven inches, things: diverse designs, a variety of flying "Dwight isn't happy to stay in poor to fair height eight feet, and it weighed 1,200 conditions, various sites, but best of all, lift. He immediately cranks in some pounds when loaded. The maximum speed you'll make new friends. You meet people negative flap and the plane really starts to was 100 miles per hour. It stalled at 38 miles who share your passion for balsa wood, haul toward an educated guess as to where per hour and cost only $4,000. glue, servos, airfoils, and the rest. Sure, con­ the lift might be. To eek out every inch of Jack Hiner designed a 1:4 sailplane scale tests are for competition, but better still, it's lift, it's important to notice remote hillsides, model of the TG-3, compromising exact the place to share your knowledge and tree lines, and small ridges. scale for the sake of improved flying quality. learn from others. Magazine articles are "Although some of the contestants just He even recorded a 3,400-foot altitude O.K., but there's nothing like seeing things fly around the sky and have a nice time, all flight to prove his point. Murph built this first-hand. You only capture the exhiliration of the better pilots concentrate their efforts.

84 WHEN C O N TAC TIN G ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER They were continually looking for clues and sack of material possessions that modern tell yourself that your airfoil is vastly superior signs as the contest preceded. I watched man is fated to drag behind him through the to that banana your competitor is using. Dwight study and analyze what was going sweaty cotton fields of Life. Lawdy! Believing this may not make it so, but it will on. He seems to know whether he's on the Aluminum templates are not (in my opin­ improve your flying. And should you hap­ edge of lift or just flying through some gusty ion) easy to make, accurately, unless, of pen to win, you can even begin saying so a ir... and he pays careful attention to the course, you own a bandsaw, in which case out loud. And in print. other pilots as they fly their planes. you don't need the template anyway. So Item: you can toss an aluminum template Although he's highly competitive, he's still once you've gone to the trouble of making into a drawer with half a hundred other a very friendly person, more than willing to one of the blasted things, you have to go templates, some used sawblades, two fish share information with you. Here's a really to the trouble of keeping it. And scratching hooks, and a spiked bulldog collar, and sporting gentleman. an ID on it. And filing it so it can be located when you go looking for the template in "Running a contest requires a lot of coor­ later. your dotage it will still be useable. You can dination and cooperation. I want to com­ If they're really such a bother, Thornburg, even loan the template to Harley Hacker pliment the contest Directors, Gordon Strat­ why have you bothered to make so many and expect to get it back in reasonable ton, Bill Meleske and the Winchmaster, of them? Well, for one thing, they can be shape. Rudy Coleman. And many others deserve extremely accurate. And there have been So aluminum has its virtues. But its vices credit. Attending this first contest has times in my life when I thought highly of ac­ are numberless; I haven't listed half of them changed my life. You can expect to find me curacy. If you're into competition flying, for yet. You can't make accurate marks on the on the contest circuit from now on." example, it's very important to be able to damn stuff with any instrument under $40. Thanks for the comment, Coulter. * * * After a number of years in this sport, you begin to evaluate every scene as a prospec­ tive soaring site. If you live in the Washington, D.C. area, you know the Pen­ WHAT R/C BOOK tagon would make a great slope soaring site. Imagine soaring from the top of whichever five-story wall faces into the wind. Granted, has complete data about more than 2.100 the folks inside might not appreciate such a distraction. I guess it's best to simply en­ joy this notion as an abstract idea. See you different R/C products from over 250 next month. * * · different R/C companies plus P.S. A couple of months ago I focused on Karl Kirkman's keel design for the 50/800 beginners tips by the Bone R/C sailboat. It's interesting to note that his Bone XI won the National Regatta R/C experts? under the expert control of Chuck Black. I also described Terry Allen's 50/800 design philosophy. Five of hisToad’s placed in the IT ’S TH IS top ten at that same Regatta. Well, sure enough, Terry has now come up with a new ship called Spot. Now for the tweaking, YEARS EDITION testing, and preparation required before the 1982 sailing season. It's bound to be a tight OF THE race!!! ·

Thornburg ... Continued from page 34 the rib pattern drawn sharply on the top. A good sawyer can cut them out in a flash. Pick a small, friendly shop and the cost should be minimal, maybe as little as a handshake. Balsa, after all, isn't too tough on sawblades. T he o n ly But the bandsaw method won't work tonight on my Brigadier. My own saw's in R/C reference storage, it's after 6 PM, and I intend to have the Brig wing framed up before midnight. So I have only two choices left for making book you ever my ribs. Let's examine them. ALUMINUM TEMPLATE METHOD really need. I've got a drawer full of aluminum templates for wing ribs. I've got templates for the Clark Y, the Eiffel 400 (rest in peace), AVAILABLE THROUGH YOUR LOCAL HOBBY for most of the early Epplers, for at least four i$7.95 s i . . 5 5 |H»tagf anil haiiillin·:. variants of the Bird of Time section, for semi- SHOP OR SEND $9.50 symmetricals and flatbottoms, for the Star- V \ n->iilfiit> add Y7< salo la\) duster and the Mini Hogan and the Royal Rudderbug and... almost every RC and FF R/C BUYERS GUIDE I've built in the past ten years. Clifton House And that's precisely the trouble with aluminum templates. Once you take the Clifton, VA 22024 time to cut one, it will be with you forever... another weighty object in that bulging tote-

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What you have to do (and this is good prac­ But the upper curve of the airfoil is a bit remains along the edges, because it can tice on other materials as well) is trace your trickier to trace. I plan to trace this template bleed off later into my fancy silk covering rib pattern accurately onto paper, then glue onto my balsa sheets with a ballpoint pen. job (not a problem with Monokote.) the papier to the aluminum. After you've cut This calls for making the upper curve, as Now for the icing on the cake. I have a the critter to shape, don't peel off the paper: well as both ends of the template 1/32 little stamp set, almost a child's toy, that I use it to record identifying info about the undersize. (Try tracing around something bought years ago for a couple of bucks. It template. with a Bic pen and you’ll see where the 1132 contains a regular Gutenberg galaxy of let­ If you don't have a bandsaw you’ll have comes from.) ters and numbers, so I pick out three pairs: to worry the metal into rough shape with I choose not to put the spar notches or W1, W2, and W3. These numbers I stamp, a coping saw or (Cod help you!) hacksaw, the leading edge vee into the template. This in blue ink, on the appropriate ribs. then use a file or coarse sanding blocks to makes for a simple tempate indeed, one Why? Because somewhere in the life of bring it down to perfection. I know highly that can be cut from hard 1/8-inch balsa the model there will be somebody who skilled machinists who hate to make with a couple of swift strokes of the old leans down and peers through that yellow aluminum templates. razor blade. A touch or two with a fine sand­ silk and exclaims ''M y Gawd, you actually And what about those spar notches? ing block to make it conform more perfectly built this Brig from an old Berkeley kit, Should you cut 'em into your template or to the tracing-paper outline, then peel off didn't you?" not? I’ve done it both ways. Put them in, the paper and check the wooden template And then I'll be free to tell him either the and each rib will take bloody forever to cut against the plan. Should be about 1/32 short truth or some happy harmless lie, and we'll out, but when it's finished it will be near both fore and aft, remember, as well as 1/32 both go a way gri η n i ng I i ke H oga n's goat. · perfect. Leave them out and you'll have to too thin along the top curve. stack the ribs after cutting and do the Good. Now to select three sheets of 3/32 EDITOR'S TWO CENTS notches all at once with a Zona saw. One X 2 X 36 balsa, one medium-hard (for root • Being a biplane fanatic of many years, mistake with that Zona saw a nd youΊ I hate ribs) and the other two fairly soft. Drawing who never built a bipe with anything but yourself for weeks. Saw the notches right, the outlines of twenty ribs on these three ribs and spars, I feel qualified, with my 67.99 however, and they'll be tighter and more sheets takes less than five minutes. Trusty I.Q., to make comment. uniform than any other method. blade in hand, I attack the sheets: twelve Cutting a multitude of ribs may not be the In addition, a notch-free template makes minutes to cut out all the ribs. most delightful part of building a model, but it easier to cut those tapering ribs out at the Now they have to be lined up (stacked) it can be somewhat painless. From reading wingtip. And to use the same airfoil on some for sanding and notching. I do this carefully, Dave's paper, it's easy to see that he and I other design with a different spar pattern. using a 90° triangle. Not that accuracy is have been down the same balsa dust road But I won't be using the aluminum terribly im portant... the Brigadier is just a many times. Would you believe aluminum template method for cutting my Brigadier sport model, like 90% of the ships we all templates for Gallopin' John, the Gipsy wing ribs. Not if I plan to have that wing build... but because I'm into a mellow Moth, Phil Kraft's Gimlet, Walt Goods Wag, framed up by midnight. I don't expect to place in my life where good craftsmanship and many others, all straight wing designs, build another Brig in the future, and the air­ is pleasing just for its own sake. still in an old shoe box? (Not a very big box, foil (a fat flatbottom) doesn't exactly set my So I mark the notches on both ends of the and not very heavy, and just enough pat­ heart aflutter. In short, I don't want to in­ rib stack, and cut them out with the Zona terns to cover the bottom inch of the box.) vest an hour or more of my precious model­ saw. A coping saw won't do here: the blade Also found a root rib (oversize) and tip rib ing time to produce a permanent template invariably bows slightly, making the (undersize) of 1/16 micarta, used to make for the Brigadier airfoil. Which leaves me notches in the center of the stack too the ribs for the straight-tapered wing on my with rib-cutting method number three: shallow. Check your notchmaking as you "Foo-Too" that held the power altitude BALSA TEMPLATE METHOD go with a piece of scrap spar stock. record for three years. Tonight, obviously, this is the method of With spar stock filling the notches, I There's one big difference in my choice. First, I tape a piece of tracing paper square up the leading and trailing edges aluminum templates that I think makes it the over the rib drawing on the Brigadier plan. with a fine sanding block, then cut the vee best choice of Dave's three methods (there's Then I trace the rib carefully, using both a notch for the leading edge. (On the one more method that I'll describe later). straightedge and a French curve. On the Brigadier, the leading edge is a piece of 1 /4 My rib templates were quickly and easily cut (flat) bottom, I trace directly over the square set on edge.) from soft, thin aluminum sheet about 1/64 original line, because I plan to use the edges At this point, my ribs are ready to use. I thick. It was a hunk of scrap I picked up at of my balsa sheets as rib bottoms. inspect each one to be sure no ballpoint ink a construction site years ago, apparently us-

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edasa roof gutter liner where two roofs met didn t file them off!) Prevent the template (usually at a 90 degree angle). There may be from shifting, and occasionally flipping it different sources, but I'm sure it can still be over may save you some otherwise wasted found. balsa. After tracing and sticking the paper rib pat­ You'll find that tracing around the tern to an oversize chunk of this stuff, I could template with a sharp blade will go almost cut the basic outline with a pair of heavy as fast as tracing with a pen... and when scissors. The aluminum usually curled a little you 're finished, you have a stack of ribs and NoUine during cutting, but this was easily straightened, a piece of sheet balsa Swiss cheese! Cut the with fingers and/or wide, flat-nose pliers. spar notches as you go. A single-edge blade, (203) 74a 7320 If the spars were internal, I either drilled a pushed straight down until it pops, does the pin-size hole at each corner of the spar notch best job on outside notch sides. A pointed (to transfer the four corners with a pin mark), blade, such as a No. 11 Uber Skiver (what Hours 4 PM to 10PM (EST) or gritted my teeth and kept drawing the else?) makes short work of the cross cut (if single edge blade along the pattern lines, it doesn't just fall out from splitting across finally allowing the notch to be pushed out. the cut) and is also useful for those inside DRAPER'S R/C SERVICE The outside notches were made by making spar notches. Incidentally, if you forget to 10 Castle Hill Drive two scissor cuts to the proper depth and notch a rib, the template will re-align itself then using nodleneese pliers (67.99, perfectly in the flash holes, just shove all the Bethel. CT. 06801 remember) to bend the tab back and forth, little notch stubs to one side, but don't at the right depth, until it popped out. A lit­ sneeze until you've disposed of them! If tle cleaning up with rat-tail files and a larger you're watching a good football game out Set up a fence next to the band saw blade flat one around the outside edge, and the of the corner of one eye while cutting, you 'll (fine-tooth saw is best, naturally) and check template is complete in just a few minutes. probably forget to stop in time and end up with scrap wood until you get the correct O h... one more step. Lay the template on with some extra ribs. rib thickness. Now start running the rib a piece of hardwood and drive a 1/16 wire That fourth method? My old building/fly- blank through, pulling off a rib with every brad through the aluminum template in iwo ing buddy, Graham Lomax, had the good pass. Hope you allowed for how much widely spaced spots. Repeat this process on bandsaw, and once in a while I'd buzz over wood this blade eats up on each pass in the other side in two different spots. Now to his house and cut ribs, sliced bologna order to end up with enough ribs! If the rib we're set to chomp out ribs. style! Start with a block of balsa of the re­ section isn't flat-bottomed (the first Bigjohn Crab a lap cutting board, your sheets of quired dimensions, draw a rib pattern on it, ribs were cut this way, back in 1962), save balsa rib stock, the proper cutting blades, and cut out a solid rib blank, notches and the top or bottom piece when you cutout and head for the TV (or wherever your all (Inside notches were drilled out roughly the rib blank and use it as a saddle so the spouse may be, so you can make some on the drill press and then the rectangle blank can ride through the saw without sociability points while building). Press the shape was finished up with a rat-tail file. rocking. template firmly onto the balsa. The flash Sand the block smooth and we're all ready Now all of that must have taken more than from the wire brad holes (My Cawd, you for the fun. a 68 I.Q.! ·

MARCH 1982 WHEN C O N TAC TIN G ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 87 MIRAGE As featured in Feb 79 Forerunner of a New Generation of Sailplane Design R/C Modeler

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C/L ...... Con tinued from page 55 for you here, if you don’t already know, you mean, you don't know, aren't you is to suggest that an experienced flier look keeping notes on each engine?) and that at the engine for you. In any case, if in the bottom end is in good shape, you will edge most of the time anyway and any doubt, do an R&R on the rod. For those know how much you can depend on it in damage, even just spots of rust, make this who don't know, either a broken rod or the next season. piece a good item to sell to your least a grenaded rear bearing wastes a bunch I used to completely disassemble motors, favorite flying buddy. of other engine parts, so don't hesitate to just to tinker with them more than anything Assuming all looks okay inside, flush the use new stuff. else, I suppose, before the start of the motor out with whatever cleaner is handy. If the rod is bad, just as well take a close season, but there is little to be learned by WD-40 seems to free things up nicely, or look at the piston, especially the wrist pin doing so. Sure, you can fiddle with the you can use a mild solvent. With things holes. Any elongation here is going to cost piston and cylinder, but it won't tell you clean, double-check to be sure that any old you later; buy another piston/cylinder set. much. What counts here is how well the oil has been removed from between the All that sounds kinda bad, but most of motor was running at the end of last big end of the rod and the crank pin. Now the time, all that is needed is to clean the season, as well as how it was starting. So try to wiggle the rod around on the crank motor, check the lower end, install the rear leave the piston/cylinder set alone unless pin, and if there is excess slop, replace the cover with a new gasket, put in a new plug it absolutely has to be removed, as it does rod. as it is another over-stressed piece. and go flying. If you know how much run­ when replacing a rod or rear bearing. And How much is "excess slop"? Best I can do ning time is on the motor already (what do then, if the motor doesn't perform, assume

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88 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER “ Full line model distributor serving dealers over 40 years” that you installed the cylinder in a slightly away new bladders once in awhile but sav­ different position and the piston no longer ing myself just one bad run per contest fits the hole the way it should. Remove and made it worthwhile, and surgical-tubing replace with new parts. . . Sorry 'bout bladders are really cheap and easy to that___ make. If you're using pen bladders, they All fuel lines need to be chucked and do last longer but still shouldn't be trusted replaced with new. Filters must be cleaned too long. Use them for practice flying if you real well, and you should probably take the just can't bear to garbage-can them. Or sell time to look at some of the newer fuel them, cheap. filters on the market, as only the best is The models should be checked over WARDCRAFT OFFSHORE good enough here. The tank has to be carefully, but actually there isn't much you 44" - 38" - 33" - 31' cleaned well, again a solvent works. Just can do here, as the really vital stuff, the N o finer racers anywhere be sure to do a final rinse with fuel so there control system bits 'n pieces, are buried C-X Record Holder is some oil in the tank to keep it from inside. If something seems bad, grit your WARD MARINE CORP. rusting, assuming it is a metal tank, of teeth and cut into the model. Or grit your P.O. Box 2579 Lynnwood, WA 98036 course. On the plastic tanks, they have to teeth even more when out flying. As a rule, Frank Ward Dealer inquiries invited. be taken apart to install new internal tub­ control systems fail with very little warn­ ing anyway, clean them at the same time. ing, and if flown enough, most any model Days: (206) 543-6534 Du-Bro makes a sintered bronze filter/fuel will have this linkage fail sooner or later. Eves: (206) 775-3969 pickup gizmo that goes in the tank and is There isn't too much you can do about it, very effective at picking up the very last other than building bullet-proof linkages in suspicious. Or keep them for "loaners." drop of fuel, as well as filtering it. This, the first place. The lines are what really need a close look; backed up by an in-line filter, and using Generally speaking, Combat models run them out and inspect them very clean fuel, will probably eliminate those with lots of flights on them (believe it or carefully over their full length. Like-new "unexplainable" funny engine runs. not, some last that long) can only be lines should be kept separate and be la­ For the bladder and pacifier tanks used trusted for practice flying, use new models beled. Bad lines need to be thrown away, in Combat, I always just toss all of them in the contests. My foamie Fast Combat not-so-bad lines can be used for practice out and make a new batch. They are too model, the Plastic Nasty, can be counted flying. cheap to trust, even out practice flying. In upon to last 12 to 18 flights and that's Actually, what I have always done is to fact, what I used to do was to make up about it, as they start breaking up in rather keep two or three sets of these N-S-B lines bunches and bunches of bladder tanks, critical places. It's not that it is weak, it's in the toolbox, loaning them out to those keeping most of them in the toolbox. Only just that it is only as strong as is necessary guys who are always borrowing things like a few would get to the pit box and after to last a few flights before getting punched lines. I figure that my junk lines are better each contest, I would throw away all of the in or hit in a mid-air. than what he has or he wouldn't be bor­ bladders that were in the pit box, just to Handles need to be checked over rowing from me, and most of these guys keep from accidentally using an old one carefully for cracks and frayed leadout who don't come to a contest with spare at the next contest. This meant throwing cables. Throw out any handles that look sets of lines, especially in an event like

MARCH 1982 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 89 Wilshire Model Center 3006 Wilshire Blvd Santa Monica. CA 90403 828*9362 Electric...... Con tinued from page 49 SOAR WITH THESE EXCELLENT SAILPLANES more, with one group giving practical AND POWER MODELS FROM WEST GERMANY assistance, and another group handling questions. There may also be demon­ OR FLY SILENTLY WITH GEIST & CARRERA strations, show-and-tell, a larger display ELECTRIC POWER area, and idea sessions. Last but not least, CARRERA GEIST EISMANN I would like to thank our KRC gas fliers for their help. They worked very hard, ROEBERS GRAUPNER WAN1TSCHEK without them we could not have done Send $1.00 for folder on Geist Electric Right Systems (in English) it." Send $10.00 for Carrera’s 216 page catalog, in color, their whole line Thank you, Heinz, and Bob, for your reports. I think the Fly Clinic is the best of Sailplanes. Gas. Electric Models and Accessories (in German) thing to come along since the start of Price of folder or catalog refunded with purchase: electrics. Usually the beginner’s prob­ Visa & Master Charge Accepted lems are easy to solve by those who BUSINESS HOURS: 10 - 5:30 MON-FRI. 10-5 SAT CLOSED SUNDAY know how already, but to the beginner they are major and frustrating. If you are Combat, very rarely replace borrowed a beginner, and problems come up, FLYING SCALE MODELS lines with a new set, so why give them a without help you have to be very stub­ new set in the first place? I adopted this born to make it through. This is really policy one day when somebody borrowed unfortunate, but these are the "early a brand-new set of lines from me and days" for electric fliers, much like the promptly went out and flew into a line 30's were for gas fliers. My own general tangle. Not a bad, line-snapping tangle, but recommendation for the beginner who a tangle nonetheless, and this duck calmly cannot get help is to start with an 05 walked over and dropped them off in my system on a powered glider, six foot size, box, said thanks and never even men­ and get a charger with an ammeteron it. tioned that they should be checked before In addition, get the book from Astro “ NEW" SPARROW HAWK F9C 2 (3 *h«ett)...... $21.50 using them. I marked the box containing Flight, “ The Quiet Revolution” . Once 1/4-tc·!· R/C 76 1/2" »pan you have a plane and motor that works, GRUMMAN J2F-6 “ DUCK" (4 th w tt)...... $19.50 the lines with the words "Borrower's 1-1/2" teal· R/C 58“ »pan things go well for your following planes VOUGHT OS2U 1 & 3 KINGFISHER...... $19.50 Lines," three contests later the same guy (4 ihwts) 13/4" teal·. 63" »pan wants to borrow lines again, guess which and projects, because you know what to GRUMMAN GUARDIAN" AF 2S...... $17.60 expect. (3 iheett) 11/4" teal·. 75“ »pan set he gets and the up line broke at a very AddS200hAndhngå postage The temptation is to get a ready-to- Brochure SO/ bad time. And I made very sure that he bought me a new set, just to be sure the fly plane, and, in fact, that is the way I SMITH PLANS started myself (the Tester gas plane, 10 9422 N. Fairway Blvd.. Sun Lakat. A2 85224 point was not missed. Only two problems with such an ap­ years ago). Unfortunately, there are very APPLIED DESIGN CORPORATION few ready-to-fly electric planes that are proach. First, it can't be a universal policy, 738 Pann Si. any good, especially considering the El Sagundo. CA 90245 as lots of fliers actually do replace the stuff hurdles beginners have to surmount. they borrow and break. The other problem MINI SANDER The only one I can recommend is the is that you can never run out of lines ADJUSTABLE TENSION Kraft Cardinal, provided the wing is cut HAND BELT SANDER yourself, no telling what somebody might in two and another inch of dihedral is FIRMLY HOLOS PAPER hand you... FDR EASIER SANDIN6 added. The Cardinal is not a "hands off” Those odd cans of fuel left over from last • Paddrt Hitt and curvts plane, though, so a beginner would • Hindy la HaM season generally get used for breaking in have to have an experienced pilot teach •EaiytaUta $2.10 motors around here, and fresh fuel is used him. There is no reason a ready-to-fly MINI-STRIPS PRECISION 0IE-CUT Madwm Garnai for flying, including practice flying. All fuel, plane couldn’t be designed to fly "hands SAVES TIME n. . _ c REPLACEMENT Fina Garna! including the new batches, is filtered, one »NO EFFORT $ 1 .3 5 SANOING BELTS Atal d Walai Pinal off” for the total beginner, but I haven’t of the easiest ways is to buy some of those seen one yet. TEE BAR paper filters used in Mr. Coffee and similar Anyhow, Heinz really did it right for ALUMINUM EXTRUSION coffee-brewing machines, stuff the filter in the help clinic. His "field cabinet’’, SANOING BLOCK a funnel and pour the fuel through. Do not which he designed for the meet, has a to m u with RUFF-STUFF trust commercial fuels to be perfectly Sail-»diva*tv· »and paper large marine battery (handles deep • Larga Tnia Surface clean. Most of the time they are, but the discharge well) in the lower compart­ •Want Wear Out 11 meh $2 25 only way to be certain is to filter it. If you ment, and multiple rapid chargers, • Handy to Usa 22 inch S3 35 consistently find junk in a particular brand voltage booster, cooling fans, volt­ of fuel, consider another brand. In my opi­ meters, and ammeters in the top com­ RUFF STUFF nion, anybody who is not careful enough "SELF A0HESIVE SHEET partment! That’s being prepared! So, if SANDPAPER" to mix clean fuel is likely to be even worse you have problems with your electric, MAKE YOUR OWN SPECIAL when it comes time to put in the right see Heinz at the next KRC electric fun SANOING SHAPES amounts of oil. fly! • Easy la Uta These are the major items to take care Last month, I talked about the Astro • No messy glut or drying time of before that first flying session, but as long • Medium — Fina - Super Fine $ .75 05XL, and several months ago, about the as you are getting ready and doing it right, Leisure 05, both of which use six-cell MINI o f c i s S A W $6.10 clean the toolboxes, buy fresh batteries or sub-C packs. These perform so im­ COMPACT 10 inch HACK SAW charge the rechargeable ones that you pressively that I just had to try the should be using in the first place. Clean fuel standard 05 on six sub-C cells too. By SAWS ANYTHING. ANYWHERE bulbs; better yet buy new bulbs, as I have Sam Ha a nigged dla-caal trama w«·« coincidence, Bob Kopski had the same comfortable, cblp-prael plaittc In- yet to see any that will last very long with idea at the same time, and we both agree ιβη handla Receding naaa and id- all types of fuels. I have owned at least one . . . it is good! For one thing, the stock juatabla 6" blada gttaa good «art icctll Cutt »ood. ptattle mttal. each of the ones claimed to last for years. Astro 05 on six cells has amazing versa­ and HARDENED MUSIC Pick up a card or two of new plugs, replace tility, it can handle 7x4,7x6,8x4,8x5, and WIRE. that old glow clip with a new one and go 9x4 props with ease, and this makes it flying. · suitable for everything from sport to MINI-SAW BLADES skh$1.75 90 WHEN C O N TAC TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER "old timer” flying. My Berkeley Briga­ dier loves this combination with the 9x4 prop. It just floats on up into the sky for six to eight-minute flights. The Astro DU-BRO Sport likes it too . . . with a 7x6 prop it is a fun plane, capable of mild stunts, ami­ “SNAP-ON” able flying, and astounding altitude, up where you can hardly see it, with six to eight-minute flights that are relaxing and a joy. The Drifter likes it too, with BALL LINKS the same type of flight, on the 7x6 prop. Bob says the Astro Sport flies well even on the 7x4 prop, with even more dura­ tion. The overall performance in all the Γ” Ί planes is milder than the Astro 05XL or (2-56 THREADED COUPLER INCL Leisure, but as good as the eight-cell 05, with more duration besides. On the BOLT-ON LINK technical side, the current draw and rpm This 3 piece ball link set (No 180) on various props are: 7x6, 12A, 9000 is a must for all helicopters and rpm; 9x4, 14.5A, 8000 rpm; 8x4, 11.5A, is readily adaptable for many linkage 8500 rpm. Try a "six pack” , life gets hook-ups on RfC planes, boais or cars better! Till next time, fly high! · Ball joint action eliminates binding and is neat and clean in appearance Only 85 <

• THREADED FOR 4-40 ROD OR BOLT Continued from page 24 1 to 1 Scale.. • TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT span, he cut two feet off each panel. When he couldn't locate a vibration problem, he cut a window in the fuse­ lage side under the wing so he could see THREADED LINK the landing gear. While others more 5-Piece ball lin k set No. 181) is versed in the scientific aspects looked excellent for off-set steering, askance at his efforts, it was hard to fault throttle and servo hookups. Includes steel ball assembly with the fact that more often than not he was 2-56 thread, washer, nut, threaded out in front (Unfortunately, little things coupler and nylon ball link. kept him out of the winner's circle). Easily adjustable. Only 8 5 C All this adds up to suggesting you relax AIRCRAFT QUALITY HIGH STRENGTH STEEL a little and enjoy the hobby/sport if these things have been a concern to you. • 1/8" TRIM ADJUSTMENT Use the guidelines available to you to . M A K ES develop your project, but if it seems O B BE THROTTLE ! unorthodox, don't rule it out completely. HOOK-UPS RIVET LINK EASYI A FINISH 4-Piece ball link set No. 182) Some months ago, I included a prod­ for those who prefer a permanent uct report on Fabricote by modeler installation. Includes nylon link, friend, Joe Naber. Since that time I have threaded coupler, steel ball with had the chance to use both the original pin and washer for peening on. Absolutely no linkage play when and the light version. I must say that it ball links are used. Nylon link was a most enjoyable experience. TAKES CARE OF ANY/ helps reduce vibration and looks MISALIGNMENT. Several factors, I feel, make the mate­ good tool Only 8 5 C rial superior over other fabrics of this type. In the first place, the material has no grain to worry about. This helps a STRIP AILERON < great deal in planning your layout to BALL LINK TOOL prevent waste, since no sag develops . Serves two uses. The curved BALL LINK between ribs end safely separates ball LINKAGE HOOK· UP links and fits the I was pleased that Fabricote works at a Fully adjustable 16 pc. aileron 1/16" threaded ball hook-up complete as shown. lower temperature than some others. I link nut. did turn it up a bit when attaching it to No play, no binding, super^, N o . 187 aluminum tubing on the newest Hiper- precision. Eliminates bipe, since the metal absorbs some heat, differential making adhesion a more difficult task. BALL LINK The shrinkage was very uniform and quite able to get rid of all the wrinkles, SOCKETS but not warp anything. Extra nylon The last feature was the fact that it sockets - Fits Should be required very little filling to make it all styles of Du-bro ball links. used on any ready for painting. Not only is this a N o. 188 4 Each $ 1.00 plane utilizing considerable savings intim e and money, strip ailerons but it adds up to less weight, and we all No. 186 know what a valuable item that is. I would strongly recommend that you check Top Flite’s Fabricote the next time DU-BRO PRODUCTS' you have a covering job to perform. INCORPORATED A NOTE OR TWO 4Θ0 Bonner Road Wauconda, Illinois 60064 U S.A. In the December issue of this august MARCH 1982 WHEN C O N TA C TIN G ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 91 85’ HARBOR TUG By Fr a n c is S. Sm ith L.O.A. 37" BEAM 10.5"

ALL WOOD KIT SAWN FROM AIRCRAFT QUALITY BIRCH PLYWOOD AND FIRST GRADE BALSA

1/4" PLYWOOD ONE-PIECE KEEL 1/8" PLY FRAMES AND SUB-DECKS 3/32 PLY CABIN DECK AND ROOF 1/16" PLY MAIN DECK AND CABIN SIDES PRE-CUT AND DRILLED BRASS PORTHOLES. HANDRAILS. STANCHIONS. SKEG. A N D R U D D ER ENGINEERED FOR SMOOTH ASSEMBLY WITH INTERLOCKING FITS OF HULL AND CABIN PARTS DESIGNED TO OPERATE ON SINGLE PROPELLER WITH ONE OR TWO (AS FEATURED IN MODEL BUILDER MAGAZINE) ELECTRIC MOTORS (RUNNING HARDWARE NOT INCLUDED, Av a ila b le O n ly From AVAILABLE UPON REQUEST) PROSPECT PARK HOBBY SHOP 512 CHESTER PIKE INTRODUCTORY PRICE $225.00 P.O. BOX 118 INCLUDES UPS SHIPPING IN U S A NORWOOD. PA 19074 CHECK OR MONEY ORDER ONLY 215 532 7695

The second note came from E.D. don't remember what ever became of it. Bridges in California. It seems that Dave "I am unable to find a copy of the VINTAGE Jt-C PLANS discovered some back issues of another Historical Aviation Album IV in my area. magazine (several years) and an article I If you still have it, could you send a did on the Alcor C61 Transport. Aside Xerox of the article and/or a copy of from the fact that I really enjoyed the your plans? I w ill gladly pay for them. model and the gathering of material, I "Congratulations on your model, 9 f t . w in g s p a n found the history of the airplane inter­ article, and thoughts expressed. ALL RIBS β FULL FORMERS SHOWN ON PLANS " esting. It was the last aircraft designed by Sincerely, PLASTIC tNG.COWLS t 9 .9 0 PR. Allan Lockheed. It lasted only a few Dave Bridges" c l e a r g u n b l is t e r s | 6 . 6 0 p r months before it was destroyed. I guess the note was doubly interesting A LARGE Pl a n s h e e t s — Plans $1695 Reading my article on the Alcor because I have accumulated additional 6 f t . WING SPAN MODEL ΡΘΥ-5Α prompted him to write the following: information and intend to build another CNGINE COWLS t 6 .3 0 PR. PICTIS $ 12.95 "Dear Bob, for competition, somewhat larger than GUN BUSTERS I 4.50 PR ADO 12^>0 POSTAGE "I recently bought some back issues of CATALOG-OVER 50 PLANS $ I 00 DEALERS WRlTE the original. I hope to work out an Scale RCM and found your article on the engine/throttle set-up that will allow WORLD WIDE Alcor. the use of the FAI option to throttle back SID MORGAN "The article and pictures stirred up and fly it on one. The Alcor was original­ 13157 ORMOND.BELLEVILLE , MICH,4 8 IH u .S A . old memories which I had almost for­ ly designed for such operation. The gotten. I lived in Alameda, California, Black Beauty will rise again! publication, I included a picture of Cliff and used to hike over to Oakland "Sleeper’’ Tacie’s Citabria, taken by my Airport on occasion. I watched the Alcor IT’S FOR SURE! daughter, Cathy. A note came from Cliff take shape, fly, and crash. Since this article is a few days after thanking me for the mention of his "O n the day of the crash, I heard a deadline, we are able to include the accomplishment, but he was wondering high pitched sound of engines winding news that the bid for Reno or Russia in where the "Russian” registration came up. I ran out in front of my house and ’82 has been decided. News arrived at from on the tail. I don’t know whether I saw two parachutes, one high and one the Underwood household via Monty did it in my darkroom or M.B. managed low, and then the Alcor going almost Groves, California, from John Grigg it, but the print was backward. After we straight down behind a stand of trees. while still at Kennedy International. got the note, Cathy and I looked, and Although it crashed about a mile away, The word is interesting and a depar­ there is a page of model photos all straight line, the sound was very loud. I ture from past experience. Russia will headed in the same direction save one; started running and got to the crash site host the control line portion and the Cliff’s Citabria is headed West. Maybe in time to see a farmer in rubber boots U.S. the R/C portions. I will report on it’s an omen of things to be, with the wading through the shallow water with more details in the next issue. At any chance of the U.S. getting the Reno bid one of the propellers, which was bent in rate, we can be certain that each group for the Scale championships. (We’re a V , over his shoulder. I picked up a will have a bonified world competition, guilty. The negative was " flip p e d " section of plywood leading edge and it would appear. Happy day! On to Reno during processing, wen) took it home. Kept it for a long time, but in '82. ·

92 WHEN C O N TA C TIN G ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER you're the first one to the scene of an Acapulco, the Atlas suddenly lifted its accident,’ he was quoted as saying. nose and danced on its transom for R/C Boats . . . Continued from page 41 “ The 52-year-old Muncey, long several hundred feet before going all acknowledged as the sport's all-time the way over backwards and landing on hull was also being repainted, it made it driving star, won a whopping eight Gold its top. Bill never had a chance as he was easy to do the deck and hatch cover at Cups, seven National High Point Cham­ still in the cockpit when the boat landed. the same time. Repainting the boat also pionships and four World Champion­ "In a conversation with Herb Stewart, allows for a paint scheme to be devel­ ships on the Unlimited circuit. He won of S.S. T. Boats, the other evening, he was oped to reflect the new deck and hatch every major regatta and held every as shocked as everyone to hear of Bill cover. major speed record, both in qualifying M uncey’s passing. Herb feels as Id o that Well, if the urge ever strikes you to go and in competition. we of the model boating fraternity, do something to that old deep vee " Muncey was the 13th driver to die should do something towards the beater you’ve been running for years, behind the wheel of an Unlimited memory of this fine hydroplane driver you now have some suggestions on how hydroplane since 1951. Muncey's loss who we idolized for so many years. to proceed. If you're not that excited will likely leave a vacuum in the sport. "As the NAMBA Chairman for R/C about taking on a deck modification, "Bill had said that if he had to go, he Unlimiteds I would like to suggest that you can easily make a new hatch cover wanted to go when he was out in front. we do the following: There has been a and make an appearance change in that Entering the second corner on the first scholarship fund set up by the Allas Van manner. Originally, I was only planning lap of the final heat at that race in Lines corporation in Bill’s memory. If to make a new hatch cover for my Prather Deep Vee 31. After trying to figure out a way to adapt my hatch cover ideas to the existing deck, it just seemed easier to put on a whole new deck. It might be that decks on other deep vees H S FOR TUBING could easily be modified to accept a new hatch cover design. That certainly would make it a much quicker remodeling job. AN OPEN LETTER TO ALL MODEL BOATERS "fo r those of you who haven’t heard, Bill Muncey, driver of the Unlimited hydroplane, 'Atlas Van Lines', was killed at the October 18, World's Champion­ ship race in Acapulco, Mexico. For those OUR CAREFULLY ENGINEERED UNE OF METAL PRODUCTS HAS UNLIMITED USES IN THE DE­ of us who had the good fortune to know VELOPMENT O f ALL TYPES OF PROJECTS. ALL him, he w ill be sorely missed. OF YOUR METAL NEEDS AVAILABLE IN OÍ4E "He had been driving the world’s PUCE. fastest race boats virtually non-stop for four decades. He had won over 60 major ALUMINUM TUBE (12") RECTANGULAR BRASS SHEET METAL (4" * 10") regattas, he’d long ago surpassed the STOCK I SIZE STOCK SIZE PRICE STOCK S!ZE PRICE NO EACH legends established in the sport by Gar 100 1/16 .25 NO EACH 250 005 Buss .70 Wood and established his own standards ιοί 3/32 .30 262 3/32*3/16 1.10 251 .010 Brass 1.10 102 1/8 .30 264 1/βχΙ/Α 1.20 252 .015 Brass 1.50 of excellence that will probably never be 103 5/32 35 266 5/32*5/16 1.30 253 032 Brass 2.70 104 3/16 40 268 3/16*3/8 1.40 254 008 Tin 50 challenged in 'his sport’. 105 7/32 .45 256 .016 Alum .50 "Throughout his career, Muncey 106 1/4 .50 BRASS STRIPS 1 256 032 Alum. 80 107 9/32 56 230 .016*1/4 20 257 .064 Alum 1.35 challenged death and for almost 31 years 231 .016*1/2 30 2S8 Assi Brass 1.30 ROUN 0 BRASS TUBI 112) 232 .016*1 50 25Θ .025 Copp. 2.60 came out on top. Along the way he 125 1/16 30 233 .016*3/4 .40 endured numerous accidents and in­ 126 3/36 .30 234 .016*2 90 BRASS ANGLE 112") 127 1/8 .30 235 025*1/4 25 171 1/8*1/8 40 juries: 128 5/32 .35 236 025*1/2 .40 172 5/32*5/32 45 "1957: Miss Thriftway disintegrates in 129 3/16 45 237 .025*1 .70 173 3/16*3/16 50 130 7/32 .50 238 025*3/4 55 174 7/32*7/32 56 Madison, Indiana. Muncey hospitalized. 131 1/4 .55 239 025*2 1.30 175 1/4*1/4 65 132 9/32 60 .032*1/4 "1958: Miss Thriftway loses rudder 240 .30 8RASS CHANNEL 133 rsTi6 66 241 50 ir > 032*1/2 181 1/8 .50 134 11/32 70 85 and hits Coast Guard cutter in Gold Cup 242 .032*1 182 5/32 56 135 3/8 75 65 243 .032*3/4 183 3/16 60 race on Lake Washington. Muncey 136 13/32 .85 244 1 60 .032*2 184 7/32 66 137 7/16 90 .064*1/4 hospitalized. 245 60 185 1/4 75 138 15/32 95 246 064*1/2 1.00 "1963: Notre Dame catches fire in post 139 1/2 1.00 247 064*3/4 1.25 SOUO BRASS ROD 112") season test. Muncey suffers burns. 140 17/32 1.05 248 .064*1 1.70 15Θ 020 08 141 9/16 1.10 249 064*2 3.00 160 1/32 08 "7966: Miss U.S. spins out in race at 142 19/32 1.20 161 3/64 .12 143 5/8 1.25 SQUARE BRASS TUB E (12") 162 1/16 .20 Detroit. Muncey finishes heat despite 144 149 1/16 So 45 21/32 1.40 163 3/32 25 chest injuries. 150 3/32 Sc 50 164 1/8 40 COPPER TUBE 112") 151 1/8 Sq. 56 117 1/16 25 166 5/32 50 "1973: Muncey suffers broken ribs 152 5/32 Sc. 65 118 3/32 .30 153 3/16 Sc 7S ROUNO PLATED SPRING WIRE 119 5/32 .40 racing outboard tunnel hull in Mem­ 154 7/32 Sc. 85 IW > 120 1/8 .30 phis, Tennessee. 156 1/4 Sc .95 192 032 08 SOFT BRASS FUEL TUBING 195 047 .08 "1974: Atlas Van Lines stuffs nose in ____ .— un __ .____ BRASS STREAMLINE TUBE 12" Detroit River in pre-season test run. 121 11/8 I ^0^ 122 I Smal I .75 Muncey suffers injuries. "Recognizing the danger, he once called racing Ά cruel sport’. "I remember Muncey saying prior to the 1977 season that he always feared hydroplanes designed with the cockpit ENGINEERING in front of the engine, even though the 5 f 6917 West 59th St., Chicago, III. 60638 Atlas was designed that way. In 1957 and Ή . '58, Muncey had driven the Thriftway, Too, first o f the cab-over designs used in the sport. ‘When you're driving up front,

MARCH 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 93 those who rally behind the lines of, "This is supposed to be a race and restricting JOHN POND the amount of nitro I can use hinders my ability to obtain maximum perfor­ mance.’’ There is no denying the fact Old Time Plan Service that the model racing engines we use in our boats like to use those fuels ranging The largest selection of plans in the world at the most between 40% and 60% nitro. There are reasonable prices. Each list $1.00 those who contend that limiting the All 4 for $3.00 nitro to 15% gives the advantage to the No. 12 OLD TIMER F/F GAS fellow who can "tric k ” an engine to No. 12 OLD TIMER RUBBER/TOWLINE perform better on lower nitro. And of course there’s that great redneck con­ No. 12 OLD TIMER FLYING SCALE A through K tention, "This is America, boy, and No. 12 OLD TIMER FLYING SCALE L through Z restricting the nitro is a Communist plot New plans prices effective Oct. 1, 1981 to make everyone the same.” P.O.Box 3215 On the other side, and there must San Jose, Calif. 95156 have been a bunch of them at the District 9 meeting, are those who con­ Phone (408) 292 3382 tend that paying anywhere from $15 to $25 a gallon fo r h ig h -n itro fuels is next season’s Cold Cup in Bill's memory. becoming prohibitive. If one does much "It w ill seem very strange next year running at a ll... I annually use 15 to 20 not to have Bill Muncey driving a boat in gallons of fu e l. . . the savings can easily the annual Seafair event on Lake Wash­ amount to a couple of hundred dollars. ington as he had done for the last 25 Running on lower nitro will lessen the years." top end performance of most of the Sincerely, engines we now use. However, this Roger I. Newton could lead to fewer blown glo-plugs, NAMBA R/C Unlimited Chmn. bearing failures, and broken parts. This NAMBA DISTRICT 9 TO RACE would also add to a lessening in oper­ STEARMAN "PT-17” ON 15% NITRO FUEL ating costs. It’s not my place to say if one group is Offered in Two Sizes, for Quadra or .60 In what seems to be one of the more right and the other is wrong. I personally Q uarter Scale: Q uadra typo Engines. 96 W Span interesting decisions to be made by a 2' Scale: For .60 Engines. 64'/»' Span. 1000 Sq. In. group of model boaters in recent years, wouldn’t object to racing on 15% fuel. Quarter Scale Plan Set: $32.50 2“ Scale Plan: $18.50 NAMBA District 9 voted in favor of a Everyone is under the same restraint. Please add $2 50 for Postage 6 Handling Other designs are However, I also favor running stock available too. send Si 00 for Catalog Partial Kits are ottered proposal at their annual meeting to limit for all ou· designs to simplify your building the nitro used in their district races to classes like the NAMBA stock OPC RICHARD G . BARRON Phone:(602)933-6911 15%. A lth ou g h I d o n ’t have a great Tunnel Class and I’m not into racing 10625 West Alice Ave.. Peorio. Arizono 85345 U.S.A. amount of information about this deci­ riggers. W e’re all entitled to our own opinions. If we can convince sufficient you would send your contributions and sion, I understand it was accepted in numbers of other model boaters that an remembrances to my address: Roger ). hopes of keeping down costs that are idea is worth trying, then that can Newton, 14518 767th PI. S.E., Renton, associated with purchasing higher nitro become the way things will be done. WA 98055. I will then in turn send a fuels. This column has carried informa­ Even those who don't like what District 9 check along with all of the contributors tion about running boats with low nitro has done won't deny that the decision names to the Atlas headquarters. or even no nitro. A couple of years ago, was reached using the proper proce­ "The second thing I would like to see we conducted some events using FAI dures and was put to a vote and passed next summer is for all of the model boat fuel, which is no nitro and about 20 by a majority. And since a majority is racers, regardless of affiliation, whether lubricant. Last year there was at least one 51%, it’s very possible that some people it be NAMBA or IMPBA, hold a race in race in District 9 where 15% nitro fuel are not going to be happy with the each district in the memory of Bill was tried. decision. Such, however, is now things Muncey. And it doesn’t necessarily have One doesn’t have to talk to very many are in a democratic organization. to be an Unlimited race, as Bill did model boaters to find out that there is a I want to thank those of you who have indulge himself in other forms of boat difference of opinion about restricting given me a call or sent me a letter with racing from time to time. I am going to the amount of nitro a modeler is allowed some photos of your boats. Whenever suggest to our district that we dedicate to use in his racing boats. There are possible, I’ll make every effort to use your photos in this column. My address is 119 Crestwood Dr. S.W., Tacoma, WA MOVING TO SOUTHERN CALIFORNIA? 98498 and the phone number is (206) 584-7131. · MAKE SURE YOU GET A HOME WITH A MODEL WORKSHOP ! ! Great Lakes..... Continued from page 19 FOR ALL YOUR REAL ESTATE NEEDS. CONTACT: Make the nose cowl by gluing pine ANITA NORTHROP blocks together, carved to fit the nose former. Hollow out and glue to the "A ” former. A fiberglass cowl could be used, MLS but it involves more work and I don’t NORTHROP think anything is gained. The receiver box is made of 1/4-x3- inch balsa. It is made the width of the / t e . EB Rea Estate inside fuselage so it can be screwed to 621 West 19th St., Costa Mesa, California 92627 (714) 642-5062 the bottom of the top wing reinforce­ ment piece. Use a 5/8-inch by #6 sheet

94 WHEN C O N TAC TIN G ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER metal screw in each inside corner. The SIMI SCiU 1930 »UNAIOOT\ receiver is packed in foam rubber and HtW! p o n y -b l i m p I I II. »»DIO CONTROLLED NON-RIGID AIRSHIR held in place with rubber bands hooked PRACTICAL SIZE Can Lift 28 O t Use Standard Radio· around the dowel pins. This places the (3 or 4 Channel); Requires only 80 Cubic Ft of Helium (Helium Available receiver in a well protected central at Welding Supply Shop·) location without extension cords, which FULL CONTROL W odt'n Thrusf-Aerodyneime Control — can sometimes cause trouble. A passen­ Forward. Hover. Backward Elevation ger can be velcroed on the box in the Turn. Ballatt Helium Release COMPUTE KIT f ormed Plastic. Die-Cut Balsa and front cockpit. Plywood Parts: Mounting Hardware. $249.00 Wrap the battery in foam rubber and W ire Plugs. Switches. Book Eaplarn- mg Blimp Operation. Detailed Plans place it just behind the firewall. Hold it and Many Photos: Completely Fabri­ in place with rubber bands attached to cated Vinyl Helium Envelope small screweyes opened up to make (Eipcťit: Motors Radio and Butteries Not Included) hooks. Use at least a 1000-ma battery, NOW YOU CAN FLY YOUR OWN you are working too close to the safety ELECTRIC POWERED BLIMP! COMPLETE CATALOG $1.00 margin with anything smaller. The engine servo is mounted upside P O BOX 2498 MB LA MESA. CALIF 92041 Peck-Polymers PHONE (714) 469-8675 or (714) 442-4636 down to the bottom of the upper wing m reinforcement. It is a little difficult to get to it through the bottom wing opening ribs were used. I haven't tried 1/4-inch but can be done. Mount it on 1/4x1/2- foam core board but, after talking to inch plywood servo rails glued and some other modelers, think it should nailed at each end with 1/2-inch brads. work good on this model. I intend to try Use flexible tubing to hook to the it some time. throttle, with a Du-Bro ball joint bolted To prepare for laminating wing tips to the throttle arm. My smoke actuating and tail outlines, first saw a pattern out of servo is also mounted on the same rails. plywood or particle board ... be sure to Do not mount servos too rigidly. undercut 1/4-inch. Saw four 1/16 x 3/4- Windshields are mounted in place inch strips off a pine or spruce board. If with pins, then epoxied. When set, the bend is too sharp for the 1/16-inch remove the pins. Put a piece of masking strips, soak them in hot water for about tape along the base of the windshield 15 or 20 minutes. They should then easily about 1/8-inch from the fuselage. The bend around the 3/4-inch pattern. Hold tape will protect it and make a line to them in place with rubber bands for half Complete with Futaba 2 Channel Radio. Electronic Speed Control. Heavy Duty work to. Fill in along the bottom of the an hour or so then remove and let dry. Electric Drive Motor & Battery $695 00 windshields with a good filler, sand When dry, glue and replace. If long Call lor details. (516) 331-3265 f .O B Mt Sinai N Y lightly, then remove the masking tape. model airplane rubber is not available RON S HOBBY STUDIO Put 1/4-inch auto trim tape around the use knotted dime-store brands. Let set Routes 347 & 25A. Mount Sinoi. N.Y. 11766 base o f the windshields. overnight. The cockpit padding is 3/8-inch plastic I have also used closely spaced nails in of most built up wings. I always build the tubing slit down one side and worked a board to form a pattern, using clothes­ ailerons in place then cut the trailing over the 1/32-inch cowling. This is pins to hold the laminations together. It edge out later. covered with artificial vinyl leather is a little easier if a bandsaw or jigsaw is The ribs are notched into the aileron obtained in yardage stores. Fold over the not available. Either way should work spar 1/16-inch. I use a bandsaw for this edge and hold in place with pins. Clue OK. but a wide blade saw with fine teeth, the pins on the inside with epoxy or Use a sharp plane to smooth the edges such as a keyhole saw should do the job cyanoacrylate glue and nip off the pins then saw down the center and plane just as well. inside when dry. down to 1/4-inch. This gives you two On each end of the 1/4-inch brass Louvers are not as difficult to make as perfectly matched wing tips. torque tube, insert a piece of wood they may first appear. Cut 36 pieces of Glue a 1/16 x 1/8-inch strip centered dowel and slide a 1/4-inch inside diam­ 1/4-inch triangle pine molding each two inside. Use clothespins to hold it in place eter brass tubing over the end to rein­ inches long. Cut a 1-1/2 x 3-inch hole in until dry. This will strengthen the wing force it for the No. 6 bolt. the side cowls where the louvers are to and tail outlines and make a better joint If the pushrods on the wing servo are be located. Glue the triangle pieces in for the rib ends. set as shown on the plans, a slight with a 1/8-inch spacer between each While the wing tips are drying, set up differential is built in, giving slightly one. W hen glue is set use a sandpaper the basic wing structure, which is typical more up than down, which helps banks block with medium coarse paper and sand down to about 1/8-inch thick. f 1 Round off the top and bottom so that it I blends into the cowl. Then using PITTS STYLE MUFFLERS I medium weight sandpaper sand up and Specifically engineered lor scale air­ down to round off each louver. Finish I craft such as the Pitts and Cessna 150 with fine sandpaper. I • Oesigned lor side mounted engines To get the seam effect on the engine cowl, use trim tape as used for cars. It is I • Angled exhaust tubes exit to the bottom ol the cowl thicker than model tape, showing up I better when painted over. Use 1/4-inch • Neoprene exhaust extensions and I nylon straps included first then 1/8-inch centered on top. Put it on the last thing before painting. I • Worm drive mounting clamp I -THREE SIZES- \ WING No. TT-40 .29-.40 $17.95 The modified NACA M-12 airfoil used I No. TT-60 .45-.80 $19.95 on the full-size plane looked good to I No. TT-90 .90-.91 $23.95 me, so I used it on the model. It worked II so well I will probably use it on any other models I should build in the future. TATONE PRODUCTS CORP. As shown on the plans, 1/8-inch balsa i?09Geneva Ave San Francisco Ca 9411? i4 iS i 334-7189

MARCH 1982 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 95 and turns. can be bent slightly if necessary to get a ference to the receiver. The ailerons must work freely. A little good fit to wing. Be sure to install the stabilizer and bit of very light lube with silicone will The hand holds on the top wing over elevator before the fin and rudder. They help. Do not use oil, as it will get sticky the front cockpit were not used on all are covered and finished on the fuselage. and in time make matters worse. models, so may or may not be built in. LANDING GEAR Wing struts are made from 5/16 x 9/16 There are three 5/8 No. 6 sheet metal The landing gear on the Great Lakes is pine cut to a streamline shape. The ends screws through .035 alum inum fittings a bit more complicated than average. are slotted lengthwise with a thick saw on each side for rigging wires. Drill a Bend the front 3/16-inch music wire blade such as a keyhole saw. Most pilot hole for each one in the hardwood first, which is also the axle. It bolts to the keyhole saws are sold w ith a fine-tooth block at the base of the outer wing front of the firewall and should be metal blade that is just right for this job. struts. assembled, with the rest of the gear, on Slots are out into the 1/16-inch ply­ Run the six screws into place then the fuselage. wood insert for the .055 wire wing fitting back them out. Put a few drops of cyano­ Bend the 1/8-inch rear wire and bind attachment. Assemble with ample al- acrylate glue in the holes to harden the and silver solder to the front wire. phatic glue and clamp. wood threads left by the screws. When The pine streamlining can be added Be sure to make the N-struts far set, run the screws back in. These six now or later. Do not use balsa, as the enough apart at top and bottom to keep screws are removed to disassemble the pine is needed to strengthen the wire. them tightly in place when snapped in. wings, the flying wires are left on the The upper fuselage landing gear Trim and finish off with sandpaper. Wire fuselage. braces are made of 1/8-inch wire. The The fuel gauge is made of balsa o r pine ends are heated red hot and bent turned on a drill or carved out by hand. around a 5/32-inch rod. Let it cool It is held in place with a piece of 1/8-inch slowly. Bend the other end to a right COVERUP! plywood. Just cut a notch in the bottom angle. They slide through the 1/4-inch of the center rib and put a 1/4 x 1/4-inch brace on each side and bolt to the back Sturdy, high quality, rich dark balsa stick on each side. Stick a printed of the firewall. You will have to elongate green vinyl-covered binders for fuel gauge on the back flat side. the hole in the fuselage to take the bent your valued copies of MODEL The gas cap on the top wing is made wire. BUILDER Magazine. Gold let­ out of a 3/4-inch plastic cap off a bottle Take a piece of 5/32-inch brass tubing o r tube. and spread one end out by tapping a tering on spine and front cover. TAIL STRUCTURE center punch in it. Cut it off about 3/8- Begin the tail by making the laminated inch long and insert it into the loops of outlines first, using the same method as the 1/8-inch wire. Spread out the other used on the wing tips. end and tap each end w ith a flat hammer The ribs could be shaped first, but the to make a tight fit. Add streamlining. easiest way to build tail surfaces having The shock strut is made of a 1/2-inch airfoils is to build them flat, then shape inside diam eter brass tube. Put a one- after assembly. Sand with coarse paper inch long piece of 1/2-inch outside to a symmetrical shape, with the maxi­ diameter in the top for reinforcement mum thickness at the spar. Glue sand­ and press down in a vice so it will fit over paper to a 1 X 2 X 12-inch block, fine on the upper landing gear brace, then file one side, coarse on the other, to give all to shape. the ribs an even contour. The lower section is 1/2-inch outside After the tail section is framed, make diameter brass tube that slides into the saw cuts in the tips with a hacksaw as upper against the spring. If you use a shown on the plans. Force some glue tubing cutter, it will press in the sides into the slots and insert pieces of 1/32- enough to hold against the spring. inch plywood. Doing this takes little The bottom is reinforced with double time and insures that the tips will not tubing one-inch long, also add a piece of work loose in the future. 1/16-inch aluminum 1/2-inch wide One B in d e r...... $5.95 Hinges are the new extra large Robart inside the end for extra strength and Three Binders . . . $15.95 Super Hinge Points. They are easier to flatten in a vice. Drill and slide over the Five Binders .... $25.95 install than the conventional hinges. axle. The spring should be fairly stiff. I The brace wires are bolted directly to figure the tires will take the good (For more than 5, include the tail rather than using fittings, for a $5.00 for each additional landings, and the spring shocks the hard reason. Besides making the job easier, it ones. What? You say you never make binder.) lessens the chance of static noise inter­ hard landings. OK, better put good Shipping: Binders shipped in U.S. springs in anyway! by UPS only. For one binder, add Standard tires were 24 inch by 5-1/2 $2 00. For each additional binder, inche (6-inch on the model) high pres­ sure. "Airwheels” 22 inch by 8-1/2 inch add 75i For binders shipped out­ (5-1/2 inch on the model) were extra. side U.S, add $3.50 for one bind­ The low-pressure 22-inch wheels were er. For each additional binder, add the most popular. The 5-1/2 inch Du-Bro $1.50 For A ir M ail rates overseas, wheels are just right and work nicely. please inquire. TAILWHEEL As far as I know, no planes came from BOULTON-PAUL DEFIANT. 25". T h is PLEASE .. All payments in US funds only long-nosed fighter has a big stab, polyhedral the factory with steerable tailwheels, but wing, and box truss fuselage. K it comes were added on in later years. So either a with formed, one-piece canopy and turret, skid or wheel is acceptable. Both are two large sheets of decals, vacu-form ed, shown. MODELS* wheels, printed balsa, tissue, rubber, and The tailwheel spring is made of three propeller. Price $9.50 plus S I. 00 UPS ship- BUILDER ing. Send $1.0 0 for plans/kits catalog thicknesses of .035 hard alum inum 1/2- inch wide. Make a bearing of nylon 621 West Nineteenth St, Box 335 (Dealer Inquiries Invited) (outer Nyrod) with a No. 10 nut forced Costa Mesa, California 92627-0132 GOLDEN AGE REPRODUCTIONS over each end to hold it onto the spring. P.O.Box 13, Braintree, MA 02184 If trouble is encountered getting the

96 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER nuts over the nylon, warm it until soft plastic a little larger and it is ready to then try again. mount on the fin. Use a No. 6 bolt on the caster with Use rub-off or decals for lettering. babh iftirahm m* micarta or similar material for the cross- Spray very lightly with a clear spray to arm. Metal may be used, but there is protect them. OLD TIMER KITS. (FuU end Psrtiel Kit·) CONCLUSION P i W Sem i-kilt--Rib Tip. and Former Kile always the chance of static noise. 1941 PUyboy Jr. 54" Span (Plan Extra) 114. SO Du-Bro ball joints are used to hook The 2T-1E doesn’t seem to have any Plan--$2.SO. Companion Strlpwood "Kst” --* 13.12 bad habits as far as I can see. I have spun Combination Playboy J r (all above item a)-f28.00 the coil springs to the rudder cross arm. 1941 Playboy S r .. 90" Span (Plan Extra) $19.25 Run a cutoff brass threaded coupler, it power off and on. It comes out in less P la n --13.00; Companion Strlpwood "K it"- $26.30 Combination Playboy Sr (all three Itema)-I4 S .00 drilled to take the spring, into the nylon than a turn. It loops, snap rolls, and rolls 1939 Zipper (Com et). 54"' Span (Plan Inc!) $33.00 socket. Put some tension on the springs. nicely, but is a bit slow. Companion Strlpwood " K lt" --IU .7 2 Combination Zipper (Both above Ite m ·)--$45.00 When assembled, coat all the nuts Do not try rolls too low (guess this is 1937 Dahaire Sportater. 109" Span (Plan E X ) $26.00 with epoxy to keep everything tight. good advice for any model). Takeoffs Plan- $5.00. Companion Stnpwood " K it"-$30.00 Combination Dallaire Kit (all three itema)-$S6.00 When final assembly is made on your and landings can be made realistically 1938 Powerhouse. 94" Span. (Plan Extra) $21.00 with smooth ground tracking. Plan- $4.00. Companion Stnpwood " K it" --$17.70 model be sure to lock all screws and Combination Powerhouse Kit (all 3 above) $39.00 bolts in place with a drop of glue to Well, this about sums it up, so get Other combinations available-- 1938 Buccaneer.$49.00 1938 Clipper MK I. $38.00. 1939 Mercury. $5S.00. prevent any loosening by vibration. started, you won’t be sorry. 1935 Miss America. $59 00. 1940 Ranger. $27.00; COVERING AND FINISH Most of my information was obtained 1940 Sailplane $70.00. 1940 So Long. $26.00. 1938 Trenton Te rro r. $30.00. Korda Wake. $16.00. I used a lightweight polyester cloth for from William A. Wylam’s very detailed MIDWAY MODEL COMPANY I Partial Kits) covering. It can be purchased in fabric drawings in M odel Airplane News, May 1936 Flying Quaker. 84" Span (Plan Incl.) $21.SO Companion Stnpwood " K it" -- $31.40. stores, and is used for lining drapes, 1956: Peter W estburg’s excellent draw ­ Combination Flying Quaker Kit (Both item»)$49.00 clothes, or whatever. Ask the clerk for ings of the 2T-1A, December 1977 to 1937 Quaker Flash. 67" Span (Plan In c l.) $17.50 Companion Stnpwood " K it" --$23.45. 100 percent polyester sheath lining or February 1978 Model Builder, and U.S. Combination Quaker Flash Kit (Both itema) $38.00 1937 Long Cabin. 78" Span (Plan Extra) $15.00 "Applause.” It also comes under differ­ Civil Aircraft, A.T.C. Numbers 301-400, Plan- $5.00. Companion Stnpwood "K it"--$ 2 4 .06 ent trade names, the clerk will know. Be V olum e 4. · Combination Long Cabin Kit (all th re e )--$40.00 MIDWAY MODEL COMPANY (Full Kits) careful not to get preshrunk. 1939 Air Trails Sportster. 50". 10-.1S. R/C $35.96 Use dope to attach it. Then tighten 1938 Powerhouse. 50" Span. .10-. 15. R/C $35.96 1940 Buzxard Bombshell. 30" Span. .020 $11.95 w ith a flatiron set by starting at a medium t940 Playboy S r .. 38" Span. .020 engines $12.95 temperature and gradually raising it Plug Sparks .. Continued from page 38 1935 Mias America. 36" Span. .020 engines $12.95 1940 Clipper MK1I. 36" Span. .020 engines $14.95 until the fabric tightens in a few seconds 1940 New Ruler. 31" Span. 020 engines $13.95 1940 Mercury (Scientific's). 36" Span. .020 $13.95 when the iron is passed over it. attempting to keep the 1/2A Texaco 1941 Request. 30" Span. .020 engines $12.95 Of course Coverite is excellent for Event the way it was intended: i.e., strict­ SHIPPING AND HANDLING 50 Page CATALOGUE large models but expensive. Do not use ly fun competition. All Contest Directors Up to $6.00 add $1.50. $1.00 PP (A copy will $8.01 to $20.00 add $2.25, be sent free, upon the plastic coverings. They do not have should be fully aware of the implications $20.01 to $45.00 add $3.00. request, with an order) the strength for a model this size. of this article. In the future, when a pro­ $45.01 to $70.00 add $3. 50 Mobby Horn and over $70.00 add $4.00. P.O. Box 3004 I don’t think I ever finished any two test is voiced, the complaint can be easi­ CA Addressee· add 6t Tax Seal Beach Ca 90740 models alike, so use your own favorite ly investigated using the above criteria Send MO.VisaAIC If* Exp). (714) 894-6223| Best 3 or CK. COD Exact Chg mornings or recorder - method. I'm still looking for the perfect ENGINE OF THE MONTH $1.50 Hdl (Cash Only) activates on 5 rings) finish. The engine featured in this month's Acrylic lacquer was the big thing column is one of the main reasons that when my model was ready to paint, so model gas engines were not popular in boat oriented magazines. When it ap­ thought I would give it a try. It was nice the early thirties. Until the advent of the peared, gas models were gaining un­ to work with, but when fully dry, I found light-weight Brown Jr. at 6-1/2 ounces, precedented popularity, the PMB&A Co. it was to o b rittle for fabric and tended to gas models w ith these heavy motors put out brochures featuring a black crack. So if you use acrylic lacquer add were generally heavy and clumsy, easily knight motif and calling the engine, the Knight Single Cylinder engine. For its a plasticizer. prone to breakage. The Power Model Boat and Airplane day, the motor had a progressive look to The Great Lakes came in a variety of Co., then located at 134 South Clinton it, although it was quite heavy for colors, but usually used the same layout St., Chicago, Illinois, were the manufac­ airplane use. trim, which was a basic color with the turers of typical engines of that era. The The engine was made mostly of cast nose of a different color that tapered to a engine, which had no name to start with, iron with bronze bearings and bronze stripe the length of the fuselage. I just was designed for boats employing fly­ con rod. Actually, the buyer was offered made believe I had bought a standard wheels to keep the motor running. The two versions; one with alloy aluminum Great Lakes and added some extra trim aircraft version was offered by the sim­ and the other in cast iron. (The alum, to personalize it. ple expedient of press fittin g the drive alloy engine is a very rare engine as very The wing registration numbers, upper washer on a slightly tapered shaft. few were made.) on the right and lower on the left, were First advertisements appeared in the A variety of options were offered. If usually black, six inches high, four inches wide, one-inch thick, with one- From the “Golden Age”. inch spacing. Rudder numbers are 3/4- inch high, between the first and second rut rib from the top, although pictures show them in various positions. FANTASTIC The Great Lakes trademark is made by tracing on clear Monokote or similar MEt SOM J S ! plastic covering with pen and India ink. The ink seems to adhere better if a little For detailed brochure, pressure is used on the pen. I use a send 25 cents to: Rapidograph but a Speedball should “INLAND SPORT” work just as well. If trouble persists, try Kustom Kraftsmanship rubbing with toothpaste to cut the glaze A Schoolyard Scale R/C P.O. Box 2699 of the plastic. For .049 Engines. 37%" Wingspan... Kitsin $22.95 Laguna Hills, CA 92653 When dry, trim to the edge of the Electric or .020 Schoolyard Scale / Light R/C Systems Ph: (7 14) 830-5 162 OUMbutOT s Dm U o (7 « ) m -ÍO M S««yj SO, tor N* Flynn· M oM i CMMog drawing and then iron on another layer o f clear plastic to seal it. Use just enough FLYLINE MODELS, INC. Dealer Inquiries Invited heat to make it stick. Too much heat will 2820 Dorr Ave. (B11). Fairfax. Virginia 22031 U.S.A. cause wrinkles. Trim the second pieceof

MARCH 1982 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 97 15 inch dia., 10 inch pitch, as produced by the PMB&A firm . For $2.25, this bea­ VES -SIR, YES-SIR, THREE SACS FULL! utiful walnut prop was cheap for its day! In addition, the firm also produced 4 ™ B æ s A v a / u a b l - e N o y jboat and airplane kits. The airplane offered was a 90 inch wingspan Stinson Reliant. Kit was priced at $17.60, which 3 i U ž included all materials, plans, and wheels. Weight of the model was an as­ tonishingly light 2-7/8 lbs. © - 0 / 3A*nE- MUne>ER. or B l a a sS-SA/ hA. P a./c£ / For the technically minded, the Knight engine featured a 1 inch bore with 7/8 WALT MOONEY NOW OFFERS 4>SaOS OF REANUT SCALE PLANS stroke, rated at 3/16 h.p. Weight of the ALL WELL TESTEO DESIGNS, AT ONLY fS.OO EACH aluminum alloy version was 10 ounces, EACH SAG FEATURES FOURTEEN PEANUT PLANS. while the cast iron model ended up at 15 o n e o t h e r , p l u s p h o t o s a n d information ounces. A simple flat type tension arm, provided with the point, allowed for an SENO t i oo FOR COMPLETE LISTING AND SAMPLE PLAN TO: adjustable gap WALT MOONEY, 2*12 CARRILLO MESA OR As mentioned before, the cylinder was SAN OlEGO, CALIFORNIA 92123 cast iron or alum, alloy with a cast iron piston having two rings. Later brochures had a different engine, slightly smaller, w ith 7/8 bore and 3/4 stroke, giving 1/8 hence the rpm was limited. BROWN A -23 CO-2 horsepower. This was basically the same Another of the attendant problems in TINY PEANUT CO-2 ENGINE engine, although specifications only ENGINE $39 95 CHARGER $9 95 running the engine was the float type gave 3500 rpm with a 12 inch propeller. carburetor. The check valves were for­ COMPLETE CATALOG $1.00 There are not to many of these engines PHONE (714) 469 8675 or 442 4636 ever giving trouble, in many cases re­ floating around these days, as 50 years is quiring a m icrometer to set. Then, too, at a long time for an engine to survive the Peck-Po/ymers any high revolutions, the valves had a scrap heap BOX 2498-MB LA MESA, CALIF 92041 tendency to flutter, which would flood the engine. Modern modelers don't know WEST COAST O/T R/C SCHEDULES one was inclined mechanically, he could how simple things are today with the Boy, are we loaded with news this machine the parts (an alum, alloy casting spray bar and needle valve setups to run month! As a matter of fact, this colum­ set for $5.75 or a cast iron set for $6.75). engines. nist has had such a time, he is quite late If he lacked the expertise and still want­ Advertising brochures claimed the (to the disgust of his Editor), but we did ed to build an engine, the finished parts tank supplied was good for 20 to 30-min­ want to get the latest schedule in now cost $10.75 and $12.75 respectively. For ute run time (the tank must have been that it has been pretty well firm ed up. those who wanted an engine ready to huge). This, of course, could only be Some of the dates may not be exact, but run, prices were $18.75 for the aluminum attained by running the engine slowly, these will be clarified as we receive the alloy model and $19.85 for the cast iron hence, again, lack of power. The reco­ information and publish it in subsequent version mmended propeller for the engine was a issues. Much of the history of this line of motors has been lost to antiquity, but the general consesus is that the engines were DATE NAME CLUB LOCATION the brainchild of Gilbert Knight, who was Feb 27 Aeroneers Annual SAM 41 Perris Valley also responsible for the large Gil (bert) Mar. 20/21 Browns Valley International SAM 30 M arysville engine The latter engine was a huge en­ April 9/10 Spring Bi-Annual SAM 49 Taft gine that we will feature in one of our May 14/15 W. C. SAM Champs SAM 21 Sacramento later columns. June 4/5 Salinas Aero Modelers Annual SAM. Salinas Rather surprising in spite of its rather July 10/11 "Fly-for-Dollars" Annual Sun-Herald Colusa modern looks, the engine was only rated Aug. 22 Marin Co. Annual SAM 27 Petaluma on their brochure at 4000 to 6500 rpm. Sept. 11 SAFFS Annual SAM 34 Reno Looking over the engine from the Karl Sept. 24/25* Pond Commemorative SAM 26 San Luis Obispo Carlson collection (from which this draw­ Oct. 15/16 Fall Bi-Annual SAM 49 Taft ing was derived), the exhaust porting is Nov. 5/6 Team Challenge SAM 30 M arysville quite reminiscent of the early Loutrel engines. As in the case of the Loutrel, the ‘ Note .this meet has not been firm ed up as of this date. We do hope Monti exhaust porting was generally insuffi­ Ferrell will put on another of his excellent meets. cient to allow the engine to “breathe"

1938 MYSTERY MODEL REVISITED DICK HANSON MODELS In a recent issue of the AMA publica­ Our Flying Hippo 825 is pretty light on his feet.We tion, Model Aviation, Doc Mathews had a good yarn about the "Mystery Model" have supplied a number of these to active competition that won on the last flight of the day. Of fliers.internationally as well as here in the U.S.A. course, the winner came in for his share The new 750 sq. inch Tipo also gets around. According of glory, but we did want to remind the to the feedback we recieve.both types are doing reader that the fellow who got nosed out extremely well at local,regional and national contests. was a well known, long time gas expert. Custom built airframes of these and other winning We are indebteded to Joe Ott for designs is still our main business but we are adding Photo No. 6, showing Carl Carlson with kits this year of the Tipo's and two new designs— his original design that flew so w ell, and The Formula 750 and the "Cheep Trick" A 625 sq. get this . . with a three pound Wall inch rear exhaust 40-46 Bird. engine! The photo of Carl preparing to crank up was taken at the old 63rd Street If we can help you too-Call or write- Field, Chicago, which today is the M id­ DICK HANSON MODELS way. Neat looking design. Too bad we 5269 LUCKY CLOVER LANE can't locate Carlson. "Hippo" Tee shirt with each order shipped MURRAY, UTAH 84107 BOO-BOO DEPT. We might have known it, the identifi-

98 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Ace R/C, Inc...... 76 INDEX TO ADVERTISERS Prospect Park Hobby Shop...... 92 Aircraft Spruce and Specialty Co. .. 101 R/C Buyers G uide...... 85 American R/C Helicopters...... 4 Dick Hanson Models...... 98 RCH Hobby Marketing...... 81 Applied Design...... 90 Hobby H orn...... 97 R/C Modelle Magazine...... 70 Associated Electrics...... 1 Indoor Model S u p p ly ...... 77 RAM Radio Controlled Models...... 70 Astro Flight...... 86 J-5 Enterprises...... 77 Ron’s Hobby S tu d io ...... 95 Barron's Scale Classics...... 94 K & B Manufacturing...... 73 Sailplane Factory, T h e ...... 84 Bavarian Precision Products...... 87 Kraft Systems, Inc...... 80,88 Satellite C ity ...... Cover 3 Byron O riginals...... 79 K & S Engineering...... 93 Sig Mfg. Co., Inc...... 5 Charlie's R/C G oodies...... 66 Kustom Kraftsmanship...... 97 Smith Plans...... 90 Circus Hobbies...... Cover 2 Leisure Electronics...... 81 Sterling Models...... 83 C overite...... 67 Loctite Corp...... 75 Sullivan Products...... 82 Jim Crocket Replicas...... 84 Marks M odels...... 88 Tatone Products...... 95 Curacao Modelbouw...... 76 Martin Enterprises...... 68 T & D Fiberglass...... 82 Delta Mfg., Inc...... 72 McDaniel's R/C Service...... 75 Uber Skiver Knives ...... 103 Drapers R/C Service...... 87 Midway Model Company...... 102 VL Products...... 78 Du-Bro P roducts...... 91 Midwest Model S upply...... 89 Ward Marine Corp...... 89 Dynamic Models ...... 68 Model Products Corp...... 104 W.E. Technical Services...... 69 Electroline Models...... 74 Model Rectifier Corp...... Cover 4 Williams Bros...... 72 Electronic Model Systems...... 66 Walt Mooney Peanuts...... 98 Wilshire Model C e n te r...... 90 FAI Model Supply ...... 69 Sid Morgan Plans...... 92 Flyline Models...... 97 Northrop Real Estate...... 94 HOUSE ADS Fox Mfg., Inc...... 71 Octura M odels...... 78 Binders ...... 96 Futaba Industries...... 3 Peck-Polymers ...... 95,98 Classifieds ...... 99 Golden Age Reproductions...... 96 John Pond O.T. Plans...... 94 Full Size Plans...... 100

WANTED — Aircraft, marine, accessory CLASSIFIED ADS business(s) Domestic, import. Closed- defunct considered Gonzie, 7920 Laird St.. Non-commercial (personal items) rate is 25 cents per word, with a minimum of $3.00. Panama City. FL 32401: (904) 235-0648 (no Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency collect). discounts allowed. All ads are payable with order, and may be for any consecutive insertion period specified. Name and address free, phone number counts as two words. Send ad and payment to: MODEL BUILDER, Classified Ads, Box 335, 621 West 19th St., Costa Mesa, CA 92627. WANTED: A.J. Interceptor, Hornet, and small hand launch Interceptors, originals or repli­ cas, top price. L.J.B.. P.0 Box 997. Ocala. FL 32678 HIGH PERFORMANCE RUBBER POWER WANTED Old model airplane engines gas PLANS — New list — Grapenut, Sainte model race cars, related items 1935-55 Formula, more. Send SASE: David Aronstein, Arthur Suhr W218 N5866 Maclynn Court 50 Pasture Lane. Poughkeepsie. NY 12603. Menomonee Falls. Wl 53051 GREAT GOLDEN AGE. WW1. WW2 built up flying models World's largest (1400) DECALS — 50 sheets assorted from WANTED — OLD MODEL ignition engines, authentic plans line 7" to quarter-size discontinued U/C, rubber kit line. $3 ppd cars, etc Paying top dollar Bill Simpson 7413 Master list SASE Catalog 60C Cleveland T. Crouss, 100 Smyrna, West Springfield. Via Lorado Rancho Palos Verdes. CA 90274 Models, 10307X4 Detroit Ave, Cleveland. MA 01089 (213) 377-3532 OH 44102 cation of Curt Sanford as the flyer of the was asked to assist in uncrating the 1 Pre-1939 W akefield (30" max w/s) snappy So Long at the Sequin AFB models in a long storage hangar. I took 2. Joe O tt day (three events) Nationals turned out to be Roger some photos, but this one was a test by a. Scale, 20 inch and under LaPrelle. He further goes on to increase someone who was supposed to fly them b. Scale, over 20 inch the red face by saying he wished the (Bert Pond probably). c. Non-scale, any size engine as identified really was an "The model in the photo was the most (all based on Joe O tt designs) Ohlsson 19. Maybe someone w ill write beautiful thing I had ever seen, with a 3. The Great Pacific Ace SAM Challenge Roger at 8014A Pinedale Ave., Austin, TX flush fitting two-bladed folding propeller 4. Multi-engine Scale 98758. He could use the engine! that nestled right into a recess in the skin Does that ever sound like an ambiti­ BRUCE LESTER SPECIAL at the front of the fuselage. Charlie Grant ous program! As the old saying goes, Just about every issue, this columnist (MAN Editor) and T.N. Bobrovsky "Nothing succeeds like success." All rub­ has been fortunate enough to be able to couldn't find a flaw in it, only that it did ber power fans are urged to write Tom run a photo taken of the 1937 through not comply to the area change that had Brennan for dates and contest info. 1939 Nationals, as photographed by been made after the models had been Should be a ball! Bruce Lester w ith his trusty Brownie shipped." PHOTOS! PHOTOS! PHOTOS! camera. Let's listen to what Bruce has to RUBBER POWER ONLY This colum nist has been w riting about say about Photo No. 7. According to Tom Brennan, of 588 Cedar- activities so much he has sort of left out "Upon arriving at Wayne County Air­ berry Lane, San Rafael, CA 94903, be­ the photos. To rectify this, we received a port with my 132 sq. in. model, I was in­ cause of the successful rubber powered letter from Jerry Persh, 4908 Sauquoit formed by one NAA (pre-AMA) official O/T meets that they have been staging, Lane. Annandale, Virginia 22003, where­ that I would not be able to compete as the Marin Club has pretty well decided in he enclosed five photos. the rules had been changed to the 200 sq. they will get a SAM Chapter Charter for Photo No. 8 shows one of the four rub­ in. Lord Wakefield rules.' strictly rubber powered model enthusi­ ber powered models that Jerry went out "As I have been corresponding with asts. This is simply great! to fly that day The columnist selected Vernon Cray in New Zealand and was Tom also indicates they will have the the photo of the Henry Struck "Flying aware, this model had been put aboard a following rubber power model contests Cloud", as we don't see that design very boat destined for New York, c/o Polks. I in 1982 (no dates as yet): much in photos. Then too, this gives an

MARCH 1982 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 99 FULL SIZE PLANS SERVICE Να 182-0.T. HI-HO $3.50 No. 1081-O.T. OLD SQUARE SIDES $4.50 Including reprint of construction art id · A 1940 convertible stick/Wakefield; uses Very realistic sport cabin from July '40 (if any) demountable cabin/pod. By Ed Lidgard. Air Trails. Nice for R/C. John Sprague. No. 9811 SCALE EDO FLOATS $150. Να 12811 XINGU $4.00 No. 3821 GREAT LAKES 2T-1E $17.95 Designed for Sig Cub. these floats fit any High performance F38 type sailplane of One-fourth R/C scale model of popular two-inch scale model. By George Wilson. contemporary construction. Ken Stuhr. Classic Era bipe. 3 sheets. Frank Corny ns. No. 9812 STINSON VOYAGER $2.50 Να 12812 A.J. INTERCEPTOR $1.00 No. 3822 SIMPLE SIMON $3.50 One-inch scale rubber model of classic Replica of the famous Jim Walker folding Really simple 1/2A sport R/C for 2-4 ch. design. Span 34". A.P. 'Speed' Wilson. wing catapult glider. By Dave Thornburg. Uses Ace foam wings. By Frank Roales. No. 981-0.T. BOOMER BUS $4.00 No. 3823 PEANUT HOT CANARY $Z00 No. 12813 SUNDAY FLYER $2.50 Another Henry Struck classic, from Feb. Easy beginner's 1/2A sport F/F. One-day Sharp staggerwing biplane racer, big for a 1941 Air Trails. For .19 to .29 ignition. Peanut but meets rules. By Bob Sweitzer. assembly. Ace foam wings. Ken Willard. Να 8811 MINI BIRD $4.00 No. 3824 1912 BLACKBURN $4.00 No. 1281-O.T. FOLLY II $4.00 Two-meter version of Dave Thornburg’s Free flight 1-1/2 inch scale model of fa­ Beautiful aerodynamic lines on this 6-ft. well known Bird of Time. Mark Smith. mous antique monoplane. By Sid Miller. gas job. Pic in July '37 MAN. Rod Doyla No. 881-C.P. SEVERSKY P-35 $4.00 Να 382-0.T. TWIN PUSHER $3.50 No. 11811 WACO TAPERWING $17.95 Miniature Aircraft Corp. 3/4"-sca!e kit Record setting rubber ship from Aug. '36 Sensational 1 /4-scale R/C model of Bob plans. All printwood parts duplicated. Model Aircraft Builder. Ralph Kummer. Lyjack's Waco. 2.b-3.5 eng. Larry Scott. No. 881-O.T. TAIBI'S HORNET $7.50 No. 1181-O.T. HALF-PINT $2.50 Sal Taibi's 1940 design for Forster 99 en­ No. 2821 ACRO SPORTSTER 40 $6.00 Tiny (24-3/4” span) pylon free flight gas Sport/pattern low winger, open cockpit, gine. Span 88", chord 16", 1300 sq. in. tail dragger, .40 powered. Peter Neuer. model for Atom or .020. Louis Garami. Complete list of over 400 plans, 50< No. 2822 MESSERSCHMITT M33 $Z00 No. 10811 HEATH PARASOL $7.50 NEW ORDERING INSTRUCTIONS Semi-scale, "bathtub" style, CO 2 po w e r­ Lightweight quarter-scale for .60 power. Price includes 3rd or 4th Clae mail. For air­ ed sport free flight. By Jack Headley. Span 94", two-piece wing. Bob Kitsoa mail or First Class (Priority) in U.S., add 25% of totalorder. For Overseas Airm ail (in­ No. 282-0.T. VIRGINIA CHAMP $5.00 No. 10812 NAVY PT BOAT $3.00 cludes Canada and Mexico), add 50% of to­ Little-known, but sharp Class C pylon, Built on Dynamic's 1/2" scale. 39" fiber­ tal order. Remit by International Money Or­ April '40 F.A., 60" span. By Bob Little. glass hu ll. Gas or electric. B y A rt Bauer. der or U.S. funds on Overseas orders. Post­ age paid for APO and FPO orders. Master Ν α 1821 Model Builder RAVEN $5.75 No. 10813 BUTTERFLY ONE $1.00 Card or VISA accepted. Include card num­ Latest in a long line of tailless R/C sail­ This little rubber powered ornithopter ber, expiration date, and signature. planes, span 110", 2-ch. By Dave Jones. looks like a big butterfly. Ken Johnson. CALIFORNIA RESIDENTS ADD 6% TAX. MODEL BUILDER PLANS SERVICE Να 182-C.P. SUPER G SHARK $100 No. 1081-C.P. N. AMERICAN B-25 $4.00 An historic two-line controlled model of Miniature Aircraft Corp. 1/2"-scale kit 621 West 19th. St., Box 335 classic lines; one of many by Vic Stanzel. plans. All printwood parts duplicated. COSTA MESA, CA 92627-0132 excellent shot of the field used for flying pete in the Texaco Event. lift off the ground except for my strong- back east. Recently, Silva was featured on the arm whipping technique. Actually, once I As Jerry says, "The loss of the Brain cover of the British modeling magazine, had whipped it into the air, the model Busters field was a real blow. Around Aeromodeller. Cliff was cited as the out­ would make several circles, descending Washington, the Bowie, Maryland field standing man to commemorate the Inter­ all the time from lack of power. is in very bad shape with all sorts of ob­ national Year for the Handicapped. "/ thought maybe I was overloading structions. However, the good news is Editor Ron Moulton couldn't have found the engine, so installed it in a Testers Pro­ that the Park officials at the Manassas a more fit subject! file. Still same lack of power! But what Battlefield Park are allowing 'silent Photo No. 11 is one that we have been the heck, I got my money's worth out of flight', which includes rubber and glider putting off for a long time, looking for a it, as the Viking was a nice looking twin in models." spot. Most everyone knows of the So those days and the real fun was just to As you can see from the photo, the Long, as published by Air Trails and start up the engine and let it run for the field is good size, but as usual, there are kitted by Aircraft, but darn few know benefit of the onlookers. always the trees and cornfields surround­ that Bill Englehart had a class B version, "As I remember, the hobby dealer only ing the area. Jerry reports the Flying simply an extended wing So Long. I list it had one Viking that sat around a long Cloud seems best suited for this field as as the Class B So Long. time before I bought it. I don't think he it seems to have a propensity for staying ever bothered to restock, as he had seen VIKING REVIEW in bounds and out of thermals. Jerry con­ my problems with flying. Incidentally, cludes by saying 1981 was a bad year for Some time back we ran an article on my Viking came without the fancy spin­ flying and hopes 1982 will be better. So the Viking Twin in the "Engine of the ner and three-bladed plastic prop. do we!! M onth" section (August 1981). This "I must have tried every size pitch and Photo No 9 depicts Bob Lane, of the prompted W illiam E. Bain to write his diameter propeller in an effort to get SAM 21 Club, with a Miss Tiny as de­ recollections of the engine. Let's hear more power. I failed to obtain anything signed by Barney Synder, of Modelcraft. what Bill has to say. resembling something to fly the model (s) Bob has put an .049 Black W idow in the "/ purchased my Viking in 1946 from a in a level course. I w ill admit the Viking model to fly it in the 1/2A Texaco Event. Wichita Hobby Shop and ran it in several was a beautiful engine to look at, to start, While he didn't do too good at the controline models. I say 'ran it' because and run Club meet at Chesbro Reservoir Area, that is what the Viking did best. . . run. It "In 1950, I gave the Viking to an engine Bob feels this airplane is a real fun would start quite easily, but had very collector in Maine who simply couldn't model that fits the concept of the new little power and suffered from low rpm. live without it. Sure wish I had it now, 1/2A Texaco Event. Bob has the right "As I recall, I put the engine in my old after all the memories your article idea. You don't have to win to have fun! Berkeley Buccaneer, which I had convert­ brought back!" Photo No. 10 shows what this colum­ ed after years of fun with it as a free nist considers the guttsiest modeler of flight, wearing out a Bunch Mightly Mid­ FOREIGN NEWS all. We are referring to C liff Silva, who is get in^the course of action. ENGLAND strictly a free flighter despite the fact he "To my disappointment, the Viking ex­ This columnist was up to Sacramento is confined to a wheelchair. Cliff is an hibited even less power than the Mighty the other week to visit his long-time avid competitor and dearly loves to com­ Midget, as the Buccaneer would hardly modeling friend, Charlie Werle (since

100 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YO U! MODEL BUILDER 1934). W hile there, discovered a letter of praise for Werle's Reid Hull Kit from George Stephenson, 22 Princess Close, Brunton Park, Newcastle Upon Tyne 3, England George was quite enthusiastic about the model and offers the opinion this is the best performing rubber powered stick model he has ever flown. Anyone who has seen one of the W erlewind kits ■ w ill agree w ith George's assessment. Not ■ only does the kit come with all parts cut, but the propeller is completely hand carved That kit is truly a love of labor! Those interested in obtaining one of these excellent kits can do so by writing Charles Werle, 3620 Morse St., Apt. 8, This naked ’lil birdie is just waiting for a Sacramento, CA 95821. covering of “fly-away" 1.8 oz. dacron and GERMANY I■ Gerhard Everwyn, 12A Dachstein Str., a brilliant coating of dope to make it the D-8000 M unich 82, West Germany, prettiest birdie in the flock. ■ writes to say that the SAM movement in Deutschland is starting to catch on. He is also writing a column in the German SITKA SPRUCE · PLYWOODS modeling magazine, "Flug", with aston­ GLUES · DOPE · TOOLS ishing results. There are still a surprising amount of German gas power, rubber, COMPOSITE SUPPLIES AND SPECIALTIES and towline glider plans to be found. Be­ I■ tween Gerhard and this columnist, we From the major source of materials for may be able to come up with still more builders of experimental aircraft. Ask for ■ German plans. Everwyn goes on to say he has a good­ model builders brochure - no charge. ly stock of Zaic Yearbooks, Air Trails, and Model Builder to help spread the word on old timers and to provide Xerox AIRCRAFT SPRUCE & SPECIALTY CO. copies of the articles. Great stuff! PO BOX 424 ■ FULLERTON. CALIFORNIA 92632 (714)870-7551 AUSTRALIA ’IRS 7 IN SPR U C E Second fo Won# m Building Supply* This columnist has been correspond­ I ing rather heavily with Merv Buck- master, Editor and Publisher of the will catch up with you! One of these ment and reflect last summer's experi­ Australian modeling magazine Airborne. days, Bill will write a long story on ences and contemplate next year's activi­ In addition, he has also been w riting to Berkeley! ties, so rules analysis is justified and time­ Max Starick, column writer for the O/T OBIT NOTICE ly. Bob Larsh advises me that all four of section called "For Old Timers Sake". Seems like we just featured an old the proposed Nostalgia Gas issues were O ld Timer activity has caught on so photo of Joe Culver the other day, when voted in. I feel an urge to summarize the well in Australia to the extent the MAAA a notice comes in from Joseph Skorski, supposed effects: (Model Airplane Association of Austral­ 106 Henderson Lane, Oak Ridge, Tenn. 7. That nice single page that contained ia) will be offering four events at the 37830, informing this writer of Culver's some simple rules for some fun events Nationals. This columnist is so enthused death. has now spilled over on to an additional he is planning on attending the Nats at Skorski goes on to say that Joe Culver page. Horsham, Victoria, starting on 29 De­ passed away on Nov. 9 at the age of 71. 2. Instead of a single approved engine cember and concluding 5 January. This Culver was noted fo r his work at Univer­ cutoff date, the rules are now complica­ should be real kicks Hope to have a sity of California in the atomic program, ted with two categories of engine cutoffs separate writeup on what is going on and later transferred to the Oak Ridge with the 7962 cutoff being the most in­ down under. National Laboratory to work on nuclear effectual unless someone spends a EFFINGER ECHOES reactors. tremendous amount of research time in Hard on the heels of the photo fea­ Joe gave up modeling in the mid­ preparing an "approved engine" list that tured in the December issued of Joe sixties when he collapsed during a con­ will require continuous updating. Raspante's "Snow White", Bill Effinger test. At that time, he and his family were 3. You can no longer walk into a hobby advises this columnist he is still putting into free flight gas, outdoor rubber, hand shop and purchase an engine that w ill out new plans all the time under the launched glider, and controline speed. permit participation in Nostalgia classes company name of W.E Technical Ser­ Of the old Oakland gang, Schumac- A, B, or C. You either must have the vices, Inc., located at 526 Lorell Terrace, ker, Doyle, Culver, et al, the only one left engines or be prepared to pay exorbitant Atlanta, Georgia 30328. is Charlie Pottol, to this writer's recollec­ prices for someone's junk, as the collec­ Bill goes on to say his plans have been tion. Truly a shame to see the old gang tors have gobbled up all the new-in-the- updated to include patterns of the cut go! box specimens. out parts (both balsa and plywood), plus 4. While the disqualification of the Cox shop drawings of the various parts. These THE WRAP-UP TD. .049 would appear justified, the will be known as "Plan 'N Pattern" sets. Thanks to Newsletter Editor Harry elimination of the larger Cox engines ap­ Also scheduled in the near future are Murphy, I have been receiving the mon­ pears just as hypoocritical when compar­ the following plans (called "20'S"): thly issues of the C.I.A. Informer. Murphy ing a Cox .75 to a Torpedo .79. Waco SRE, Super Buccaneer, Mureaux writes such an informative paper it is 5. Weight rules contributed no value in Interceptor, Snow White, DH Puss Moth, hard to put down. While I do not always the fifties, so why should they be ex­ and the 77 inch span Custom Cavalier. agree with his viewpoint, I think his com­ pected to contribute anything to the That should generate some interest. ments on the latest round of rules revi­ events in 1982. Anyone who can keep a Bill Effinger closes off by saying sions fo r the Nostalgia Event bear Ramrod 600, which is to be powered by a Berkeley Models simply ran out of repeating: Torpedo 23, to weigh out at 23 ounces or money from lack of cash flow. When "This issue is pretty well water-logged under. . . all I can say, he deserves ap­ you get too many accounts receivable with articles about rules, but it is that plause, not criticism. and can't collect, your accounts payable time of the year when we pause for a mo­ 6. Finally, it appears that a lot of ballots

MARCH 1982 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 101 disastrous results, or the flight of a model at ridiculous speeds due to inadequate power. "On the other hand, a 1/4-scale model o f some aircraft, such as the small Pitts, produces a model smaller than those normally flown by scale enthusi­ asts. If a 1/4-scale diehard tries a B-29, he will wind up with a model larger than a full size WWII fighter. Practicalf ",Fact is that the development of large models has been dependent on the same factors as for full scale aircraft. Namely, bigger, faster, and heavier means more power. Large models have been around as long as modeling, but large engines have not. Recent produc­ tion of larger glow engines and conver­ sion of industrial ignition engines for model use has expanded the variety of were marked and submitted with little though in less number than the past aircraft that can be modeled in larger forethought to their ultimate effect on couple of years, for a long time. A sizes, but not when tied to any arbitrary the big picture. Nevertheless, the CIA Miniature Aircraft Taylorcraft flew in the scale. Maybe we should forget about the turned the rule procedure over to those '62 Nats R/C Scale com petition, and my term one-quarter or any other fixed who participate so that all could have say Gipsy Moth flew in the 1965 and 1966 scale. It bears about as much relation to in their formulation. The vote is valid, the Nats com petition. In those days, how ­ the actual size o f a model as the term full rules are effective Ian. 1st. and I w ill com­ ever, they were merely called three- scale does to the actual size o f a real ply." inch-to-the-foot scale models. Bill Ber­ aircraft. To this columnist, this sounds just like trand’s huge, but super-light Fokker "If we still want to differentiate the fix the SAM movement finds itself in D-VII flew at the Glenview (Chicago From the simple one-page rules written between large and small models, then by this author, we have "graduated" into area) Nats in about 70, and my recollec­ weight seems to be the best criteria. We eight or ten pages of bewildering rules tion is that it was larger than three-inch may be able to build large light models, and counter rules. I don't know how we scale ... but maybe not. but small heavy models are not around do it, but someone always manages to The m odel group in Las Vegas, headed for long. The current AMA rulebook foul up the "FUN" Keep the faith, men! by Eddie "Mad Man” Morgan, can cutoff at 15 pounds for Giant Scale seems probably be credited with originating reasonable. However, even here, the the term "quarter-scale", and appro­ rules allow for much lighter than 15- Workbench.....Continued from page 6 priately enough, when the real, big R/C pound models to be called Giant Scale model movement began, most of the so long as they are built to 1/4 or more ments by Dan Rutherford and a letter scale subjects were lightplanes and/or scale. Sound nutty? I think so too. writer by the name of Ed Hopkins, in classics from the p re -W W -ll days that "So maybe we should just build our Dan's December '81 C/L column were the right size for quarter-scaling. models to whatever fractional scale will (mustn't be too much C/L activity to talk However, since then, many modelers fly right with the engine available. If it about), in which we ... I (along with have sought further variety, often find­ comes out over 15 pounds and has a others) was taken to task fo r using the ing that three-inch scale was not practi­ practical wing loading, it may not be so-called editorial “we” in all of “ our” cal, calling for models that would be too better, but it will be big." column writing. As a long-time admirer small (Pitts, Eagle, etc.), or too big (B-17, "CECONITE R/C” of Howard McEntee’s writings on radio Hughes "Spruce Goose” , etc.). Old friend, Jerry Nelson, is back on the control in the old A ir Trails, as well as the Can you imagine the poor outsider modeling scene. Jerry needs no intro­ years and years of writing by Bill Winter, who hears about quarter-scale, and then duction to the hobby industry and to "we” figured it was best to follow in sees a one-third scale Pitts and a one- radio control modelers. He is co-owner their footsteps. Besides, as it says in the twentieth scale Spruce Goose at a of Midwest Model Supply Co. hobby dictionary, "we” is used by editors and "Quarter-Scale" meet? We're not find­ distributors and was sales manager fo r 10 writers to avoid any appearance of ing fault with the fine work and promo­ years, former president of Circus Hob­ egotism from repeated use of “ I” . There tion which the QSAA has done for the bies, innovator of Formula I pylon racing is nothing more boring to me than hobby of large-scale model aircraft. Just and Sport Biplane events, rules origina­ listening to a long string of “ So I said wish they had come up with a more tor and contest director for five Tourna­ this.. and “ I says to him. ..”, and also fitting name. ment of Champions competitions, noted a continual flow of "I’s" in written Col. Art Johnson (7-1/2 foot P-38 in R/C aircraft designer and writer, has material. On the other hand, however, June 1978 MB and 93-inch P-40 in June now established his own R/C model I... m e... Bill Northrop, do agree that 1981 MB, a Nats w inner! has some other supply company in Reno, Nevada. Prod­ in certain applications "we" and "our” thoughts on the subject. uct line is directed towards the larger get a little ridiculous too... "W e glued "I sometimes think that the people radio control model aircraft. the cross piece in just ahead of bulkhead several years ago who tried to make the Working directly with Ceconite In­ C". Nuts! I was in the garage all by myself term 7/4-scale equivalent to large scale corporated, a pioneer in the full scale and "I" glued the cross piece in! models did the hobby more harm than aircraft covering industry, a product line Anyway ... you get the drift. From good. Actually, there are very few man­ of Ceconite R/C has been created to here on I will use "we” when appro­ made objects that vary as widely in size provide modelers with a new type of priate, and we will use "I” when appro­ as do aircraft. Restricting the reproduc­ covering material and associated sup­ priate ... in my or our opinion. tion of these aircraft to 1/4-scale limits plies. The following items are now NOT REALLY QUARTER the choice of practical subjects to the available. "Quarter Scale” is probably the most relatively small light planes, homebuills, CECONITE R/C FABRIC. A 1.8 oz./sq. confusing misnomer in the history of and trainers. Efforts to tie Giant scale yd. heat tautening fabric that is ideally model aircrafting (somehow can’t drive models to the arbitrary 1/4-scale criteria suited to large scale aircraft. Very rea­ myself to say "m odel aviation” ). Large led some designers to attempt larger sonable in cost. scale model aircraft have been around, military aircraft in this scale with usually CECONITE R/C SUPER SEAM. A ce-

102 WHEN C O N TA C TIN G ADVERTISERS, TELL ’EM MODEL BUILDER SENT YO U! M ODEL BUILDER IN THE BEST CIRCLES, IT’S fib er skiwer

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HEAD LOCK 'NEW STANDARD" R/C W o rld .....Continued from page 12 III FOR GLOW PLUG ★ ★ ★ While you, the dedicated hobbyist in CONNECTORS the midwest and nor’east, are building furiously for the coming flying season, CHECK THESE FEATURES and we, here in Southern California, are 1.Push, twist, its locked on. able to fly 13 monthsout of the year (that 5 3.75 2. Push, twist, its off. 3.W ill not wasn’t nice, was it), we thought that another ‘quiz’ would be in order for a at your favorite come off' even under heavy one-year subscription to MB. h o b b y dealer engine vibration. 4. Will not This aerobatic maneuver is not too it not evtiitbie. wnn direct: add oc tst outside u.s.j. 5 short out· 5. Positive spring w ell known. First perform ed in 1951, and contact. 6. 30 inch lead wire. considered impossible by many experts, MODEL PRODUCTS CORP. BOX 314 Pom pton Plains N .J .07444 especially so considering the aircraft involved, and at the altitude the pilot in question performed said trick, this ment used to attach Ceconite R/C to boost glider, with two-channel gear would explain its lack of fame. At the aircraft structures and also a general aboard, weighs less than 240grams. They time, it was considered to be the first purpose model cement. climb to approximately 300 meters (over completely new and original aerobatic CECONITE R/C FILLER COAT. A water 900 feet) in six seconds (!) before drop­ maneuver in 20 years! I havetried it with based primer that is applied directly ping the rocket pod. The duration pattern birds (have you ever tried to over Ceconite R/C, eliminating the maximum is five minutes, which ships explain to someone not familiar with need for clear dope. like this can easily attain in dead air. model aviation, what is meant by a Also soon to be available will be a THINGS TO DO pattern bird, or, that you fly pattern?), selection of R/C plans by Jerry Nelson. The Westerville (Ohio) Model Aero­ aerobatic bipes, and various assorted First plan will be a 1/4-Scale Super Cub. nautics Association is sponsoring its 12th R/C birds, and got close, once. A big Other plans by R/C designers from Annual Radio Control Hobby Show on heavy bird (inertia!), or a tw— will be the around the world will also be made March 20.1982, from 0900 to 1600. (Why answer, or lots of rudder . . . The available. W rite to Ceconite R/C, 3510 can’t we all use this simple and positive maneuver was named after the m an.. . San Mateo Ave., Reno, NV 89509; (702) time-keeping system, instead of AM and Enough clues, now... OK, the man’s 322-0664. PM? First we gotta convince the w atch­ name AND the name of the maneuver, makers. Hah! Lottsa luck!) Jerry introduced his new product line to my attention, c/o MB . . . and I have a The W M A A show is located at 3850 at the IMS Pasadena Trade Show in few more ‘gems’ ready for the troops, Stelzer Rd., Columbus, Ohio. Site is less January. The new covering material will W.C.N. allowing... than two minutes from the Morse Road be reviewed in a near fu tu re product test Scale m odel boaters, take notice. W e exit to the 1-270 Columbus outer belt, by Al Alman,on the Sigl/4-scaleClipped have included a picture of the “ Blue- contains 11,000 sq. ft. of display area, and Wing J-3 Cub. nose” fishing schooner. The model parking fo r 1,200 cars. Contact Show CANNON GUIDED ROCKETS utilizes plank-on-frame construction, Manager Rich Ritchison, 1834 E. Beau­ Hey, you R/C model airplane nuts,do w hite pine planks w ith glass cloth and m ont, Colum bus, OH 43224, fo r more you know what’s going on in R/C model resin for strength. Overall length is 83 information. · rocketry lately? They're firing rocket- inches and the beam is 12 inches. W eight powered model aircraft (Radio Con­ with ballast is 40 pounds and two- trolled Boost Gliders, in rocket lingo) Twin Pusher...Continued from page 39 channel radio handles it all; head sails into the air and staying up for as long as being preset, with a sail winch handling 3-1/2 hours. (Well .. . they just hap­ those who have been curious enough to the main and foresail. Designed by pened to fire them up at Torrey Pines,so give ’em a try, are usually staunch Douglass Henderson of Moscow, Idaho, the duration came about from slope supporters of the concept. we hopefully will be presenting a con­ soaring.) However, that was good Perhaps all that's needed to invite struction article in the future. enough for three new world records, all others to give the T.P. a try, is a set of full ★ ★ ★ taken from former USSR records! size plans, and thus our decision to R/C off road racing is hitting the Chris Flanigan and John Langford set present this one. A close look at the country and Southern California by three new Boost Glide duration records, plans will probably suggest some im­ storm. RCH Hobby Marketing spon­ in Categories S1A (2.5 Newton Seconds mediate changes in structural design, sored (co-sponsored by MRC) and power level), S4C (10 ns), and S4D (80 but we’d suggest that you at least stick to hosted the Western Championships ns). Flanigan’s S1A and S4C Boost Gliders the basic force set-up. And for equal recently and drew a tremendous group stayed up fo r 2,180 seconds and 7,537 performance, keep the weight as close of drivers and spectators alike. One seconds respectively. Beating the Soviet to a 4-ounce maximum as possible. hundred twenty entrants participated in U nion records of 1,038 and 1,405. John Those "I” beams should present an 46 races over the two-day weekend. A Langford’s S4D glider was up fo r 12,406 interesting challenge ... a good exer­ specially prepared track was set up to seconds (3-1/2 hours), beating the cise in precision table-saw work, or glue really give the drivers and their off-road Russian record o f 8,953. All boost gliders them up from three strips. The criss­ bombs a real workout. When 'fine used Cannon Super Micro radio sys­ crossed bamboo braces add lots of tuning’ gets down to the proper weight tems. Incidentally, the speed during the rigidity to help the beams carry 10 oil in your shocks, that says a bunch for rocket boost, before the power pod is strands each of rubber. The article ‘what’s happening.’ As has been m en­ dropped, can reach up to 400 mph! suggests only an inch or two of slack, as tioned in the past, RCH and its track is The 1980 American Space Model this w ill stretch to fo u r to six inches, and just several doors down the street from Team also used Cannon Super-Micro’s any more than that hangs down from the MB, and any evening finds a large group in their FAI 40 newton-second Boost "cans” and kills the glide. Leading edge running and tuning cars. In this area, Gliders to win a Silver Medal in the of the wing should be 14 inches from the electric power equates to co-existance.. World Championships at Lakehurst, thrust bearings ... no balance point is Fire up a fuel powered car and lose a New Jersey. suggested. racing site. The quiet revolution is A typical 40 nt-sec. rocket powered Give it a try, and let us know if h e re .. . ·

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% i£ President Cannon Electronics, Inc No. Hollywood, CA Do you know what the best selling R/C product inyour local hobby shop is? Answer: MRC -Tamiyas Baja Buggies.

Hobby shops throughout the county are selling them at a record pace. These miraculous, off-the-road buggies have created a new R/C category. RCers are taking them to the beaches, deserts, mountains, raceways. They’re running them through sand, dirt, mud and water. They’re clearing obstacles and taking on mud trails that have never been challenged before. Superior engineering makes these buggies as much fun to build as to run. You’ll find a sealed metal case covering the transmission. And a water resistant box protecting your radio gear.Two forward and one reverse speed powered by a special electric motor provide power for clearing obstacles and taking on the terrain. Fully adjustable,fourwheel indepen­ dent suspension to tune the chassis to the road is all designed in. But fun is the big drawing card, and anywhere you go they go. You’ll fly over jumps and absorb jolts that would send other R/C cars to the pits. You’ll sail over ramps, land in full control Skate City, Great Western Radio Track and keep on trucking. Hobby Raceway 10723 Beach Blvd. 14330 E. Telegraph Road Jacksonville, And because you build these machines from a precision kit, Whittier, CA 90601 Florida 32216 you'll be able to modify, repair and keep them on the road indefinitely. 213-946-1402 Bob Teeple 904-642-2228 There has never been anything like them before.They’re number The Pit Shop Mark Seyforth 1655 East Mission Blvd. one at your hobby shop NORTHEAST Pomona, CA 91766 Bills Hobby Supply 714-623-1506 Joe Lynch now. Get one and let the WEST COAST 600 North Main fun begin. OFF-ROAD Bishop Enterprises East Long Meadow, Ranch R/C Raceway Vegas R/C Raceway Mass. 01028 R/C TRACKS 22849 Cooley Drive 720 S. Decatur 413-736-7711 Here’s a partial listing of Colton, CA 92324 Las Vegas, Nevada 89107 714-824-5850 Gil Losi Bill PoliackJr. R/C car raceways where 54th Aero Squadron Mini Baja Raceway Park you can run your MRC- 18930 Soledad Canyon Rd. Pension Road Tamiya off road-vehicles 6734 Reseda Blvd. Canyon Country, Englishtown, N.J. 07726 ★ ★ ... there are competi­ Reseda, CA 91335 CA 91351 201-446-6331 TAMIYA 213 345-7300 Lou Peralta MRCØ tions, fun running, obsta­ 805-252-2644 Vince Radosti Model Rectifier Corporation cles and more. See how R C H Raceway Marshall Gilbert Ray’s Hobby Shop 653 West 19th Street 468 Jerusalem Avenue 2500 Woodbridge Avenue good you really are. For Costa Mesa, CA 92627 SOUTHEAST P.O. Box 710 details contact the track Uniondale, N.Y. 11553 714-631-1555 B & B Sales Co. 516-486-4047 Edison, NJ 08818 nearest you. Larry Van Osten 2759 West Main Street Ray Jacobelli Smellville, GA 30278 404-972-2328 Fred Botts