MAKE THE QUANTUM LEAP Quantum is Airtronics’ world class the flexibility to match your individ Elevator, Flap, and Spoiler Controls. PCM professional R/C series, offering ual preferences and flying style. Quantum QM8P provides Two the finest top of the line features avail The 8 Channel FM/PCM Narrow Snap Roll Adjustments, Idle Up, Low able on any Airtronics R/C system. Band Quantum Series features Pulse Travel Throttle Trim and Variable This state of the art system is Code Modulation, Plug-In RF Mod Pitch Control Adjustments, Rudder/ refined and engineered for ule, Electronic TYims, and Adjustable Aileron and Rudder/Elevator Mixing. superior flying. Advanced Length and Tbnsion Sticks. Quantum utilizes a features allow you to Quantum incorporates cartridge-style plug-in preset and control Cartridge-Style NiCd battery. all aspects Plug-In This advanced of pattern NiCd system also features Travel Adjustments on Elevator, Aile ron, Rudder, Throttle and Prop Pitch, Automatic Dual Rate Rudder, Exponential Adjustment on Ailerons, Elevator and Rudder, Preset Flap TYim, TYim Dual Rate, Retract and Landing Gear Brake System, and Mixture Control.
Quantum features an accessible, front-mounted control panel. aircraft maneuvers One look will tell you this R/C and scale flight system means business; from its operations. clean professional appearance to its The Quantum QM8P full array of advanced technological gives you the competitive Battery, flying features. advantage of fully adaptable L.E.D. When only the best is good transmitter features, providing Indicators, enough, get the best radio you can |OM8f> SYSTEM SPECIFICATIONS: Low Battery buy. Make the quantum leap to Transmitter Type: 8 Channel Digital Proportional Narrow Band L.E.D. Indica- Airtronics’ Quantum. Dimensions: L: 7” x W: 2 " x H: 7'fe” Weight: 40 0Z tor and a Liquid Power Output: 750 MW Crystal Display with Bar Graph 0 i ID TD fiU lP C Frequencies: 50 and 72 MHz Meter and Integrated Timer. "nU ntU O INC Modulation: FM/PCM 11 Autry, Irvine, CA 92718(714)8304769 Power Supply: 9.6 Wilt NiCd The innovative QM8P also featuresK ' ” — ™ Current Drain: 210 MA Servo Reversing, Dual Rate on Eleva Receiver Type: Dual Conversion FM/PCM Narrow Band tor, TYiple Rate on Aileron, Fail/Safe A irtmnics' complete new product catalog is available Sensitivity: 1.5 Microvolts (nominal) for $2.00. Please send check or money order to the Power Supply: 4.8—6 0 Volt NiCd with Inhibit , and Mix Functions for address above.
At Airtronics, we want to be known as the best, not just the best known. New book “briefings” from Η·Α· BEECHCRAFT: STAOOERWINO TO FROM TH E GROUND UP, WeiCk and SUPERFORTRESS: THE B-29 AND STARSHIP. Ed Phillips, Staggerwing, Hansen. Autobiography of aeronauti AMERICAN AIRPOWER, by General feechcrah Twin Beech. Bonanza every pro cal engineer Fred Weick, designer of Curtiss LeMay and Bill Yenne. Here is .u^jtvuv. to si otNHir duction and experimental Beech air the Ercoupe. Ag-1 Piper Pawnee ag the complete story of the B-29 as told plane ever flown is documented. plane and the Piper Cherokee. Weick by General LeMay who implemented Complete warbird coverage of UC-43, made a significant contribution to its fighting strategies. . .from Gen GB-1, AT-7, AT-11, 045. the mighty XA- the advancement of aeronautical eral Billy Mitchell's vision of the '20's 38 Grizzly. Postwar years including technology, including development of for long range strategic bombing. .. Model 35 Bonanza, Travel Air, military the steerable tricycle landing gear. the massive war effort that pushed and export models, T-34 Mentors, Covers history' of< ERCO and tr - the B-29 off the drawing boards and Barons, Dukes and the legendary coupe, development of the Ag-1 Paw through the factory gates in record King Airs; they're all here plus much, nee and the Cherokees. 109 photos, time and the strategic bombing of Ja much more. With 245 photos, includ drawings. 556 pgs, 6' x 9', hdbd. pan and the atomic strikes. 24 pgs. of ing many never published before, ...... 4351C $39.95 photos, 288 pgs, 6' x 9'. hdbd. 343-view drawings, technical specifi ...... 3220D $18.95 FOKKER FIGHTERS OF WWI, imrie. cations . 96 pages. 8% * x 11*. stbo. From the genius of "the Flying Dutch ...... 2012AS14.e5 CURTISS 1907-1947, Bowers. man". Anthony Fokker. came the Complete history of Glenn Curtiss THE PIPER CLASSICS, Christy. The fighting machines that and his companies. Model by model fun "Cubs” —simple tube and fabric out of lmmelmann and coverage with clear crisp factory pho aircraft. Discusses the evolution of "Fokker fodder" out of many tos. historical detail and full specs Piper lightplanes— J-3 Cub, J-4 aircraft. Great photos of the »rly experiments by Gleni Coupes, J-5 Cruiser, PA-11, PA-18, Eindekkers. DR-1 Triplane, Curtiss and exhibition tours. From Vagabonds, Colts, Pacer/Tri-Pacer, parasols, and obsure types. 120 early flying boats, June Bug, NC-4, even Wag-Aero's CUBy. Also cov- tos,68pgs.,7' x9V«',sfbd...... Jenny, Hawk fighters and racers, ereds: Availability, problems. SPECS, ...... 4549C $8.95 THE AMERICAN Robin. Condor to the P-40’s, C-46 and rebuilding, maintaining and operat THE AMERICAN FIGHTER, Ange- jet a/c. Hundreds of photos. 637 pgs, ing. 101 illus. 160 pgs, 5" x 8*. sfbd. luccl & Bowers. A definitive reference fig te r 5Vi* x8V*'.hdbd 3383C $34.95 ...... 4208BS13.e5 book on American fighters from 1917 | THE PIPER INDIANS, Clarke. Gain to present, superbly chronicling TEST PILOTS by Richard Hallion. practical insight into the reasons for The complete story of the men, their every model and variant from WWI bi planes and accomplishments, from the increasing popularity of the Piper planes to the sophisticated war ma the pioneers of flight through the Indians! A model-by-model inspec chine of today. 870 photos and 1340 tion of the series: the original PA-28 schematic drawings, with perform Golden Years to the first iet and the Cherokees · the improved Indians; ance specs and production history first man on the moon... from Jenny Warriors, Archer, Dakota · the retract- on everv olane. 480 pqs., 8V i' x 11, to Voyager, from Spitfire to Space Shuttle—and the technical break ables; PA-24 Comanches. PA-28R Ar hdbd...... 3475C $40.00 rows - the hard working sixes; and the throughs they risked their lives to ver Tomahawks, Apaches. Covers: where ify. Some stories end in tragedy, oth to find, maintenance, specs, refur Dramatic New Videos! ers in brilliant triumph, but each bishing. and . all of those ADs and helped explore the frontiers of flight. STCs and modifications. 112 photos. Over 150 photos, pgs.. 6 ' x 9'. sfbd. 288 pgs. 7-x 10', sfbd. June Release...... 4352C $17.50 4213B $16.95 ONCE THEY WERE EAGLES PACIFIC AIR RACE, Scheppler. Eight Walton. The men of the Black Sheep wood, wire and fabric planes took-off Squadron, Corsairs vs Zeros, combat from Oakland. CA. Aug. 16. 1927... at its best. You’ll fly the missions, their destination, Honolulu; their party with the men. share their victo goal, glory prize monies. Two of the ries and heartaches, get to know eight made it. This is the true story of "Pappy" Boyington. Nifty then-and- ONCE the pilots, mechanics and the by now portraits of the pilots. Going to THEY standers. 66 b/w photos, 208 pgs, be a classic, this well researched hdbd...... 4353C $24.95 book is great combat writing with no minced words. Well illustrated. 214 ea g le s U.S. NAVY CARRIER BOMBERS OF pgs., 6"x9'. hdbd. A Reviewer's WWII. Profiles of the TBD Devasta Choice!.. 2926C $18.00 tor, SBD Dauntless, SB2C Helldriver THE AIRSHOW. The most spectacular performances of the US and TBF/TBM Avenger. Carrier opera Blue Angels. Italian Freece Tricolor!, Canadian Snowbirds plus PAN AM: AN AIRLINE AND ITS AIR tions, both routine and hazardous are the Brazilian and French national aerobatic teams as the per C R A FT, R.E.G. Davies. Pan Am s depicted with excellent three-view U.S. N»vy form at the Canadian Abbottsford International Airshow. Take story spans the entire history of air drawings, color side-view and 121 your seat In the cockpit of the world’s fastest and sexiest air transportation in the U.S., from float C a r rie r photos and cockpit views. 120 pgs., planes, to "China Clippers." to the jet B o m b e rs Of craft as they swoop and soar wingtip to wingtip. Witness exhi 8 V i'x ir .s fb d ...... 4103A S9.95 bitions of the Harrier, Tomcat, Hornet, Concorde and SR-71 age. Covers the history of the airline World War II Blackbird. 60 min. A REVIEW ER'S CHOICE. by focusing on acquisition of a new U.S. NAVY CARRIER FIGHTERS OF ...... VHSV8979N BETA B8980N only $19.95 airplane or expansion of its air WWII. A fine reference volume con routes. 32 full color scale drawings taining profiles on the Buffalo. Wild ADVANTAGE HORNET. Breath-taking footage puts you in the by Mike Machat. 20 maps, 96 pgs.. cat, Hellcat, Corsair and Bearcat. cockpit of the F/A-18 Hornet. Share the pilot's view of flight 1 1 'x8Vi', hdbd. . 3478C $24.95 Lots of combat photos, cockpit and testing, aircraft carrier qualifications, air combat maneuver detail shots, plus high-quality three- ing, weapons delivery, mid-air refueling and heart-stopping TO P GUN. Hall. Fly with the best view drawings. 153 photos, 51 color low-level formation flying. Experience this remarkable ma fighter pilots in the world, in training side and top-view paintings. 120 pgs., chine from tree-top level to over 50,000 feet. See why the Hor at NAS Miramar at the Navy Fighter 8 % ' x 11'. sfbd...... 4104A $9.95 net was chosen by the U.S. Navy’s “ Blue Angels." 60 min. Weapons School. Ride with them at ...... VHSV8722D BETA B8723D $59.95 supersonic speeds as they hone their WINGS OF CESSNA: MODEL 120 skills by maneuvering with and out- TO TH E CITATION III. Ed Phillips. EAGLE COUNTRY. You’re there in the cockpit as you scramble shooting agressor aircraft. Witness The complete family of Cessna air after intruders trying to penetrate North America and Central their rivalries, egos, and commerade- planes from the rag-wing 120 to the European Airspace. Feel the "G " forces as you push the F-15 rie as they live life on the razor's high-tech Citation III. Experimental to Its limits In spectacular air-to-air combat. Brief with F-15 pi edge. 144 pgs., 120 photos, 24 in full- ships, one-of-a-kind, the CH-1 heli lots as they discuss tactics, missions and weapons. The F-15 color, sfbd.. 8’ χβν·*. copter and military models, every one Eagle Is every fighter pilot's dream and every MIG pilot's night ...... 4436A $12.95 documented with technical changes mare. 60 min...... VHSB8720D BETA B8721D $59.95 by model year, specs., performance, THE SMITHSONIAN BOOK OF total built and serial number data. FIGHTER ACES OF WW II. Return to 1943 with tour Aces of the FLIGHT, Walter Boyne. A fresh look Much new info on the classic 170 and 357th F.G. of the Mighty 8th, their own stories, their gun-cam- at aviation history going beyond a 190/195 models. 229 photos of air era-footage. Not a Hollywood re-creation, but "The Real Stuff." mere chronology o f events. Boyne planes and instrument panels plus These are the pilots who changed the course of WWII as they captures the drama of the develop more than 50 detailed 3-view draw escorted American bombers deep Into enemy territory and ment of flight as it really is. a deeply ings make this a valuable reference stayed to challenge, and defeat, the best the Wuftwaffe had to Interrelated complex of men. ma chines and national priorities. 1F5 for the buff and modeler. 100 pgs., offer.47minutes.. VHS8714 w a s $29.95— NOW $13.98 Sfbd...... 2011A $12.95 full-color photos, including a 12 page full-color gatefold. 130 b&w photos. IN DETAIL & SCALE $7.95 EACH Pilot Manuals 288 pgs., 9’/.' x 10% '. hdbd...... 3477 $35.00 F-4 Phantom II Part 1 ...1041B 8-29 Superfortress...... 1050B P-38 ...... 1401B *6 95 B-26 1411B $12.95 P-39 ...... 1402B $5 95 AIR PORTFOLIOS— A full-color pic 8-17 Flying Fortm* (PI. 1)10428 8-17 Flying Fortress. Perl 21051B F-4U .. 1412B $7.95 torial history of the World's most pop F-16 A Λ B Falcon 10438 F-4 Phantom. Part 3.....1052B P-40 ..... 1403B $6 95 F 6F .. 1413B $7.95 ular airliners and civil workhorses. A F-111 Aardvarfc ...... 1044B F-106 Delta Dart...... 10538 P-47 ...... 1404B $6.95 FM-2 ..1414B $10.95 spotter's guideϊ to the colorful liveries F-5€ & F Tiger II...... 1045B F-15 Eagle...... 1054B $9.95 AT-6 .. 1415B $7.95 of each operatortor of that aircraft. Ex· F-18 Hbmtt...... 1046B F9F Panther ...... 1055B P-61 ...... 1405B $7.95 Spitfire ...1416B $395 tensive ms give historical per- F-4 Phantom II Part 2 ...1047B F9F Cougar...... 10568 P-63 1406B $7.95 Hurricane ...1417B $3.95 spective interesting facts. Each F-82 ...... 1407B $7 95 . .1418B $3.95 book contains approximately 64 colon F-105 Thunderchiel .... 10488 F11F Tiger...... 1057B photos in 64 pages. Hdbd.. x A-10 Warthog 1059B B-17 ...... 1408B $8.95 Me262 ...1419B $7.95 F-14A Tomcat...... 1049B 7Va\ DOUGLAS DC-9 and F-101 Voodoo ..... 1061B B-24 ...... 1409B $10.95 F-80 .. 1420B $7.95 Vol. 1-Boeing 737 P.R. WcDOKNEU DOUGLAS MODERN FIGHTING AIRCRAFT $11.95 EACH B-25 ..... 1410B $10.95 B-29 . 1436B $10.95/ Sm ith...... 2391C $8.95 w >WD-80 F-15 Eagle ...... 1301C The Harrier. 1305C Vol. 2 -S horts 330 and 380. JANE S SERIES Sm ith...... 2392C $8.95 F-16 Falcon ...... 1302C A-10 Thunderbolt H ... 1306C 2374C $1095 Vol. 3-Douglas DC-9 and MD-80. F ill...... 1303C F/A-18 Hornet...... 1307C ...2375C $10.95 Sm ith...... 2393C $8.95 F-4 Phantom ...... 1304C F-14 Tomcat ...... 1308C Hercules Gaines...... 2381C $12.95 Vol. 4 -A irb u s A300 and 310. Sm ith...... 2394C $8.95 14 DAY MONEY BACK GUARANTEE .ola I Send Items; lot ttama Call us Toll Free Please S 3.95 Handling Print Total Enc ■ W Aviation U S Funds . 800225-5575 Name__ 3850H CORONATION RD.. EAGAN. MN 55122 MN, AK, and foreign countries use 1 -612-454· Charge: □ VISA □ MasterCard Address.. 2493 (not loll free). Charge VISA or Master- Acct. No______City____ Card. MN residents add 6% sales fax. Dealers invited. Authors manuscripts invited. Exp. Date State Zip. Country. MODEL # SEPTEMBER 1988 _____ x
volume 18, number 200
898 West Sixteenth St., Newport Beach, California 92663 Phone (714) 645-8830
STAFF EDITOR/PUBLISHER CONTENTS W m . C. Northrop, Jr. FEATURES GENERAL MANAGER Anita Northrop WORKBENCH, Bill Northrop...... 6 ASSISTANT GENERAL MANAGER Dawn Johnson DEAR JA K E ...... 7 MANAGING EDITOR OVER THE CO UNTER...... 8 Richard Dowdy BIG BIRDS, At Alman ...... 9 PRODUCTION ARTIST Kimber Jett-Baird AIR/SPACE EXPO, Bill Hannan & lim Alaback . . 12 DRAWINGS BY RAMBLIN' IN AUSTRALIA, Stu Richmond . . 14 Al Novotnik ELECTRONICS CORNER, Eloy M a re z ...... 16 ACCOUNTING MANAGER Robert Ruiz MODEL DESIGN & TECHNICAL STUFF, Francis R eyn o ld s...... 17 SUBSCRIPTION MANAGER CHOPPER CHATTER, Dick Crossman...... 18 Audrey Peterson R/C GUFF, THE LIFE STORY, PART TWO, Walt G o o d ...... 20 CONTRIBUTING EDITORS ELECTRIC POWER, Mitch Poling...... 24 A l Alm an Walt Mooney Jake D oe Mitch Poling ALL ABOUT ARFs, Dr. Art Steinberg...... 26 Bill Forrey John Pond ENGINES OF THE WORLD, Stu R ich m o n d ...... 27 Steve Gray Fernando Ramos Dick Grossman Francis Reynolds PLUG SPARKS, John Pond...... 28 Bill Hannan Stu Richmond R/C SO A RIN G , Bill Forrey ...... 34 Dick Hanson Bob Stalick Cees Kaijim Art Steinberg H EY KID!, Bill Warner...... 37 Dave Linstrum C liff Tacie Fred Lehmberg John Thompson lohn Thompson CONTROL LINE, ...... 42 Eloy M arez Bill Warner THE PAINTED DESERT (USFF CHAMPS), Dave Linstrum...... 44 ADVERTISING IN SID ERS, Dave Linstrum ...... 48 Gordon Boudewyn Advertising Accounts Manager HANNAN'S HANGAR, Bill Hannan ____...... 50 Corporate Office FREE FLIGHT, Bob Stalick ...... 56 (619) 744-7337 Al Novotnik 4 Beverly PL, Norwalk, CT 06850 CONSTRUCTION Bus. Phone (203) 847-7478
MODEL BUILDER (ISSN 0194 7079) is published monthly by RCMB INC., 898 BLACK STAR, Michael Saponara...... 10 West 16th St., Newport Beach, California G O LD B ER G 'S Z IPPER O.T., Cad Goldberg...... 33 92663. Phone (714) 645-8830. Subscriptions: $25.00 per year, $47.00 for CONSOLIDATED XBY-1, Mark Fineman ...... 52 two years. Single copies $2.95. Subscrip tions outside the US (except APO & FPO) $38.00 for one year only. All payments COVER Benny Howard’s DGA designs are well-known to air race enthusiasts DGA-3. "Pete," must be in US funds, drawn on a US bank. was literally drawn up around the dimensions of an 88hp Wright Gipsy engine and a pilot. Copyright 1988 by RCMB INC. All rights Although Benny hadn't planned on racing Pete himself, the 1930 Air Races found him without reserved. Reproduction without permission another pilot to whom he would trust the plane. Pete went into competition with Benny Howard prohibited. at the controls and came out with five firsts and two thirds, several of which had been won against planes of much greater power. The cover painting is an idealization of Pete’s days of glory, crys Change of address notices must be tallizing the moment of rolling level after rounding a back course pylon during one of the races received six weeks before date of issue that of the 1930 season The number two plane, the Wedell-Williams No 92. did indeed finish sec new address takes effect. Send old address ond to Pete in the 19301.000 cu. in. free-for-all while being flown in an early, low-power config with new. . .old label preferred. Duplicate uration Behind the Wedell-Williams is a Lambert monocoupe. The original 22- x 28-inch painting issues cannot be sent. Postmaster send ad by Bob Benjamin is available for purchase. Photo prints of this and all earlier Model Builder race dress changes to Model Builder, 898 W . plane covers are available as well from Robert A Benjamin Aviation Art. 1222 26th Ave.. N .E .. 16th St., Newport Beach, California 92663. Olympia. Washington 98506. Second class postage paid at Newport Beach, California, and additional offices.
2 MODEL BUILDER Take a look at an A.S.P. from our vantage point We'd like to take this opportunity When you look inside, you will efficient in transferring heat from to show you one of the newest, notice many of the features that are the cylinder/piston assembly to the most advanced R/C engines on the common these days: Schnuerle crankcase.) Feel the smoothness face of the earth, the A.S.P. .40FSR. porting, an aluminum piston run and the precision fit of all the parts. The A.S.P." (Acceleration, Speed, ning in a chrome plated brass These features are what separates Performance) .40FSR was originally cylinder, ball bearings, and a three the A.S.P.® 40FSR from any other designed to be a good, low cost piece crankcase. So you might ask, R/C engine in any class. sport engine for the every day R/C "What is so different about this But, please don't take our word pilot. Not only is it a great sport engine?" Notice the precision for it. Go to your local hobby dealer engine, but, because of it's high crafting of the turned, one piece, and ask about the A.S.P.' .40FSR RPM and dependable performance, hardened steel crankshaft. Look at engine or better yet, try one out for it is proving to be the perfect the mirror smooth true chrome yourself. You'll be glad you did. engine for competition. plating on the cylinder sleeve. (The A first look at the A.S.P. .40 FSR sleeve is only chromed on the might not win you over because the inside. This method is far more finish slightly less brilliant that many engines. Now look inside.
A.S.P.’ 40FSR Comes standard with muffler and carburetor. Weight - 12.1 oz. Top RPM -13.600
COMO’engines are sold WORLD ENGINES INC. and serviced exclusively 8960 Rossash Road. Cincinnati. Oh. 45236 in the United States by Phone: (513) 793-5900 · Telex: 214 557 Wortd Engines Inc. These products are available exclusively through World Engines' dealers nationwide. « ο ι »
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We say that Sig CAs will be the modeler’s choice because they have been developed from the very beginning with model airplane builders in mind! Developing products that suit the aeromodeler is one of the things we do best. That’s because we are modelers ourselves! In fact, we have five National Champion modelers on our design staff and that wealth of modeling experience has helped us develop a CA adhesive system that has all the qualities you want. It hasn’t been easy, Sig CAs have been in the “works” for quite a long time, over 3 years to be exact. That was 3 years of extensive testing and evaluating parameters like bond strength, workability, penetration, gap fill ability, tip clogging, odor, shelf life, and adaptability with different woods and other different modeling materials. The end result is a CA adhesive system that has some different characteristics that we know modelers will appreciate. After all, we have been in the business of pro ducing quality model products for over 37 years. We are not about to let you down now. Drop in and check out the new Sig CAs at your local Sig Dealer. You will be glad you did. SIG MANUFACTURING CO., INC., 401-7 South Front, Montezuma, IA 50171
Sig CAs - They are designed especially for modelers /
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Boats A Planes Co R O C K H IL L 12410 W Nation·) Ave BROOKFIELD WAUKEGAN Northshore Shopping Center Hobby Cooperative Supply Slepnorth 100 North Mam R ock HiM H o b b e s W A LD O CINCINNATI The Craft N Hobby House Lake County Hobbes REVERE 13225 I Street 1204 Mt Gallant Road Kvmdtog Hot 933 E Mam St PH 8338216 847 Federal Road 37632 N Shendan Road Tony's Hobby Shop NEVADA Carl's Hobbes SOUTH DAKOTA 104 S Mrft PHOENIX COLUMBIA PH 312862-4544 90 KjmbaM Ave Ph 284-8756 L A S V E G A S 1188 W Kemper Road ABERDEEN W A U K E S H A The Hobby Bench No. 1 R/C Hobby House INDIANA WALPOLE J.J s Hobby Den PH 513-742-5880 K le in 's ABC RC Inc 8058 N 19th Ave Ph 9981755 Route 66 PH 2289343 FO R T W A Y N E 8 A 8 Hobbes Inc 4972 S Maryland Parkway*) CIEVELAND/PARMA 406 S W.tson 14418 East Mam St PHOENIX DANBURY Phil's Hobby Shop 938 East Street NO LAS VEGAS National Hobby. Inc RAPID CITY WAUSAU The Hobby Bench No 2 The Hobby Center 1722 Lake Ave Ph 4285056 WORCESTER Peterson Hobbes A Craft* 52» R»ge Rd Ph 7482450 R C A H o b b e s Pooe s Hobby Land Paradise Valley Mad 366 Mam St PH 7489984 RICHMOND Ray's R/C Specialties 3262 B One Center Drive FINDLAY Rte 6. Bx 1270 Ph 7874658 640 South 3rd Ave 4550 E Cactus Rd GLAST0N8URY Rad» Control Center 12 Sherman St PH 757 5883 RENO Jim Model Supples WATERTOWN CANADA P h 9 9 6 7 2 0 0 DavisHobb.es 1408 So U St. Ph 9355060 MICHIGAN High Serra Models 721 Rockwell Ave H o lto n 's H o b b e s BAWIF ALBERTA PRESCOTT 45 A Welles Street IOWA A N N A R B O R 953 W MoanaLanePh 8289098 JACKSON Route 2 Box 14 Alberta's Littiest Airport The Hobby Shop Fox Run Mall PH 633 3056 CEDAR RAPIDS Rider's Hobby Shop NEW HAMPSHIRE P ro p Sh o p TENNESSEE Box 6 PH 373 3953 217 W Gurley St MILFORD The Helicopter Shop 115 W Liberty KEENE 127 Pearl Street COVINGTON CALGARY ALBERTA PRESCOTT VALLEY Radio Active Hobbes 5771 Country Ln N E BATTLE CREEK Leisure Time Hobbes LAKEWOOO M H S u p p ly Calgary Hobby Supply Ltd 114 star Shopping Center Valley Hobby Shop 374 New Haven Ave COUNCIL BLUFFS Hobbv House 141 Winchester St Ph 352 1518 Wmgs Hobby Shop Inc Box 3173. Stn "8" 17112 Detroit Ave 221 5383 8331 East Valley Road Farm er's Market Place Bud's Hobbies l C ra ft* 506 Riverside Or Ph 9689105 MANCHESTER K N O X V IL L E CALGARY ALBERTA SEDONA PH: 2038778200 133 W Broadway BATTLE CREEK Queen City R/C LANCASTER M A N H o b b e s PM S Hobby Craft My Hobby Shop NEW MILFORD DES MOINES JT Hobby 760 Hevey St PH 6236913 Slater's Inc 1923 Branvilie Rd Ph: 525-7532 154-495 36th St N.E Smith s Corner Ph; 282 1290 Class Act Hobby Shop Hobby Haven 825 Golden Ave NASHUA Pta/a Shopping Center K N O X V IL L E ROCKY MTN HOUSE. ALBERTA SIERRA VISTA (Mail Order) 27 Old State Road 7672 H
• We have a great bunch of readers. In our July column, we mentioned that someone "Carried away? With what?" was trying to find out what became of a Northrop military aircraft that was lost dur growth in the number of exhibitors and in the sponsoring club's nearby flying field. ing W W II, and some years later fished out terested modelers who attended. This is an 'Dan Yarchin, chairman, and his commit of the River Thjorsa in Iceland for the pur active area, and there is every expectation tee can be proud of the show, and they have pose of restoration, as it was a rare that this show w ill grow in size and impor plans to improve it even more for next year. specim en. tance. The Fair Grounds is close to inter It deserves your support." As it turned out, a complete article on the state expressways, has a large free parking "H E Y , K ID " completed project appeared in the March lot, and a modern display building. We've had lots of great letters on the 1981 issue of Air Classics magazine. One 'R/C car racing and helicopter flying was "Hey, Kid" series by Bill Warner. The fol reader sent a copy of the article to the in demonstrated in a fenced display area on lowing, written by Earle W. Thompson, of quirer and sent us a copy as well. The air one side of the building. Boaters had a long Los Angeles, California, was just a little dif craft, sort of an A-17ish-looking design w ith pond on the other side of the building ferent, but still meant as a compliment: twin floats, is now on display in Oslo, Nor which allowed them to demonstrate the "I launched a 'Super' Sleek Streak into the way, after being restored by personnel of the high-speed performance of electric- air. It flew away over the trees, I know not Northrop Corp. powered vessels. R/C planes were demon w here. Another reader sent us information on strated Saturday evening after the show at "I launched a 'Perfect' Peck ROG into the the plane, a Northrop N-3PB, by way of co pies of newsletters from the Vintage Aircraft Boosters Club, a part of the Northrop Recre ation Club, which is also affiliated with the Western Museum of Flight, 12016 Prairie Ave., Hawthorne, California 90250, phone (213)332-6228. Also included was a copy of The Taildragger, the newsletter for the WMF. This, in turn, is "currently the visible part of the Southern California Historical Aviation Foundation (SCHAF), a nonprofit organization registered with the State of California." You can contact the W M F at the above address or phone to find out more about its operation and purposes. Visiting hours are 9:30 to 2:30 daily, except Sunday, and there is no charge. Membership in the Foundation is available. M.A.R.C. SHOW The last of the hobby consumer/trade shows for the spring season of 1988, took place in Baltimore (actually Timmonium), Maryland, on )une 4 and 5. This was the Fourth Annual M.A.R.C. (Mid-Atlantic Ra dio Control) show. The following report on the show comes from exhibitor Ralph Warner, Radio Controlled Models (RAM). 'Modelers who had attended the first three shows were impressed by the obvious
6 MODEL BUILDER air. It flew away over the trees, I know not to be the result. and they demanded that we go through all where." "Now I launch overweight, Surprisingly, most of the mail addressed the formalities and red tape to make it offi warped-wing Bostonians into the air. They to Model Aircraft Builder, to the best of our cial. As a matter of fact, we had to do some fly into the trees, but sometimes I get them knowledge, came from n ew contacts, who, fast talking just to get that issue mailed as a back." "This is progress?" seeing the tittle for the first time, just as "temporary, one-time experiment," or sumed that was it, period. However, several something to that effect! So obviously, we MODEL AIRCRAFT BUILDER? pieces of mail came from known regulars dropped the change on subsequent issues You might recall, or maybe didn't notice, who apparently just took it as a matter of until we've had time to give it further that we modified the logo/title on the cover fact, and made no comment. The very few thought. of the May 1988 issue per the above head who did make comment were all in favor, ing. It was rather tentative, and we figured to one in particular saying, "I don't care what Strangely enough, we received more mail measure the reaction before making a per you call it, just keep on doing the same about the modified title from regular manent change. Actually, we figured that stuff!" One regular "correspondent," how readers after we reverted back to the old ti inserting the word "Aircraft" in smaller type ever, took strong exception to the modified tle than we did previously. . .all in favor of in the middle of our regular logo would be logo. . .the Post Office. According to the the change. Anyway, it's not a closed issue. sort of subliminal in effect, and maybe postal authorities, the modification con If anyone has any comments or suggestions, hardly be noticed. That almost turned out stituted a complete magazine title change, drop us a line. ·
D ear lake: If you have watched any sports events lately, you couldn't have missed those guys holding up signs reading "john 3-/6" or the like. I always thought it was a religious mes sage until the other day. I was at a pattern contest and I saw a man holding a sign that said "lake 7-10." I saw another one at a soar ing contest. It read "lake 9-17." Now, either you are a British agent taking a coded mes sage on the price of tea, a religious prophet who says we all go to a pizza stand in Detroit when we die, or a figure skater and I've been seeing your judges' scores for ar tistic merit. These all came from deciphering the signs. I can't make up my mind. Tony in Barrie, Ontario D ear Tony: That was my dentist. I have a tendency to forget my appointments, so he was remind ing me of my cleaning in July and my checkup in September. Jake * * * D ear lake: cally into the air, I couldn't help but feel the * * * How come you never write about free euphoria of true, free flight. Not one penny D e ar lake: flight? invested, and yet there it was, racing with Now that the Tournament of Champions No Wires or Strings Attached the wind! Right through the park superin is on again, have there been any changes to Dear No Wires: tendent's living room window, and right the rules? I don't write about free flight because I've into his wife's collection of Danish blown Aerobatics Enthusiast in San luan concluded that there's no such thing. First, glass miniatures. Dear Aerobatics Enthusiast: if you want insurance, you need an AMA So my last attempt at free flight cost me Only minor ones. Aircraft must still be license. They're not free. Second, if you $246.93 and made my paper route non scale models of real aerobatic airplanes in want a flying field, you have to belong to a profit for the next 11 months. I don't write order to be eligible. Maximum allowable club. Their dues aren't free. Finally, when is about free lunches either. scale deviation is still ten percent, and gross the last time you got or built a model air Jake weight may still not exceed 22 pounds. plane for nothing? Have you priced silk Known, unknown, and freestyle Aresti lately? How about balsa wood? Did you * * * maneuver schedules will still be flown know that Ecuador is fast on its way to be within a fixed 120-degree viewing "box." coming a wealthier nation than Saudi Ara D e ar lake: The one change from 1984 involves the bia? It's not from banana sales. A high-performance sailplane designer scoring bonus awarded to biplanes. Back When I was about 14,1 took my last real writing in the American Institute of Aer then it was ten percent, and there was some shot at trying to achieve free flight. I m ade a onautics and Astronautics (AIAA) Journal discussion that it was too high. I disagree. hand-launch glider. No propeller, no gas said that his new airfoil had a bifurcated Granted, biplanes finished first and second, engine, not even a rubber band. I built it out vernier cusp, and as a result, the loci of but the next best biplane was eighth, and all of twigs and sticks fallen from trees. I lined imaginary roots in the Bode domain had the others finished substantially lower than my pockets with plastic baggies, and snuck transmogrified from an underdamped that. Nevertheless, the biplane bonus has out contraband rubber cement and paste Dutch roll to a classical Epstein lateral been lowered to six percent this year. We'll from school. I covered it with toilet tissue divergence. What was he talking about? probably see a few more monoplanes as a lifted from a public restroom on the Carden No Comprendo in Lewiston, Maine result. State Parkway. Total cost of materials was Dear No Comprendo: The only question that remains un $0.00, and since I was under 16, my labor The capital of Botswana, make-believe resolved is: W hat happens if you break your was free. radishes, a corpse, a croissant from Hol monoplane's wing in two while doing a I took it to a neighborhood park with free land, and a college running back named snap roll or a high g pull up? Does it then admittance and no parking fee. As I Epstein, I think. launched it and watched it soar majesti Jake Continued on page 107
SEPTEM BER 1988 7
revealed that I'd been operating my four- channel AM transmitter with an FM crystal. According to Cliff's note on the repair sheet, "This combination of crystals doesn't work well except close up. Did you do a range check? Come on, pal, 'fess up! I gotcha!" Had I looked closer, I would have seen that the new crystal was tagged with an "FM " and not used it. But I didn't and paid the price. Use your eyeballs and don't take any thing for granted; there could be more at stake than just your plane. SACHS 40 Here are the tach readings for A&M Air craft Supply's (1801 South Crest, Carrollton, Texas 75006; 214/242-0984) new Sachs 40 that I forgot to include in last month's colum n. These numbers are most impressive for a • Being able to change crystals so we can barely 50 feet, but I found that I could get 2.6-cid engine, especially when you con fly on a different frequency whenever we the needed 100 to 125 feet by moving the sider that, 1) all three test props have high have to may be an advantage, but it sure has receiver a few inches away from the bolted- load factors, 2) the engine had only 30 min its pitfalls. Last week I bent a good flying on aluminum landing gear, so I proceeded utes of running time, 3) she was fed a 40:1 machine and the crankshaft on my engine to fly it this way for well over a month with gas/oil mix for break-in (100:1 is recom because I didn’t carefully check the new no apparent problems. mended for normal running), 4) all running crystal going into my transmitter. Here's But last Sunday, after making a "bounce was done with a SuperTigre muffler in what happened: and go," my luck ran out. My beautiful BIG stalled, and 5) the test stand was a huge I picked up a new four-channel tranny for Bird was directly in front of a Channel #38 packing case with lotsa frontal area that a paltry sum, but had to get a new crystal transmitter when she executed a kamikaze caused m ucho backwash: 20x6-10, 7300 because it was originally set up for Channel attack, right there in front of God and rpm; 20x10, 6800 rpm; 18x8-14, 6900 rpm. #56, and I operate on Channel #40. everyone. This 3-1/2-pound, short-stroked power When ordering the crystal, all the neces I didn't say anything out loud but was house is a hybrid and sure to please be sary info (such as brand name and model blaming that Channel #38 tranny for splat cause it's so light, easy-starting, smooth number) was included, and I did verify that tering all over my frequency. Hey, it had to running, and gutsy. Al Willaert has taken it was a Channel #40 crystal before install be his fault because I had a new, recently the piston, cylinder, and shaft of a 2.6 Sachs ing it. tuned rig; right? and then added his own carb, case, mount, I should have "gotten the message" when Wrong! A thorough check by Cliff Wei- my first range check using this TX yielded rick and his band of merrymen at Airtronics Con tinued on page 78
Air Flair's new 81-inch Express was designed for 1.2 to 1.5 2-stroke and 4-stroke engines.
A nice-looking Morrisey Bravo from the Sig kit by Bob Burich. This Ed Andrews turned out this six-foot version of a Fokker DR 1. A one came in at 17.5 pounds with a Zenoah G-38 for power. G-38 hauls this 20-pound tripe around.
SEPTEM BER 1988 9 B lack Sim By M ICHA EL SAPONARA. . .Having never seen a swept-wing, Vee-tailed model, the author decided to de sign one. The result is a fun flyer with foam wings and an .049 engine for radio control.
• I enjoy building and flying swept-wing Star to people, they invariably say that the created to keep the plane in the air. That models. Vee-tailed models are rather rare, model is one of the nicest they have seen. I plane used about 2/3 of the Ace constant but even more rare is a Vee-tailed swept- hope you agree and decide to build the chord wing, and it was for this reason the wing model. Well, as you guessed, I Black Star. plane would not fly with the reed engine. decided to design just such a model, the You may remember a model I presented Black Star uses the full constant chord "Black Star." In all my years of modeling, I in this m agazine about a year ago calle d the wing, which adds about 25 square inches, don't think I ever saw a swept-wing model Viking. That model used the Ace foam wing and thus allows the plane to fly with the less with a Vee-tail. also, and I cautioned not to use a reed-valve Whenever I show a picture of the Black .049 engine because not enough lift was Continued on page 82
Author/builder with his sleek black beauty. The use of ready-made Power for the Black Star is an .049 engine, with the author's prefer foam wings from Ace R/C makes construction easy. ence leaning toward the Cox Black Widow or the Dragon Fly.
10 MODEL BUILDER SEPTEMBER 1988 FULL-SIZE PLANS AVAILABLE-SEE PAGE 106 11 AIR/SPACE EXPO
By B IL L HANNAN & JIM A LA BA C K. . . Despite hot weather and interminable traffic delays, the first Air/ Space Expo, designed to rival the Paris Air Show, offered a close look at some very special aircraft.
• Brown Field, on Otay Mesa between San ternational extravaganzas conducted at lowances of manufacturers to such an ex Diego and the border of Mexico, is usually Paris, France; Farnborough, England; and tent that few can afford to participate every a fairly quiet airport. But not during May! Hanover, Germany; as well as the more re where. Thus, a cautious wait-and-see The former W W II pilot-training facility was cent ones held in Singapore, China, and attitude by such major U.S. firms as Boeing, transformed that month into a world-class Australia. Although there are plenty of en Lockheed, McDonnell Douglas, and air show and display site, changing its im thusiastic spectators in all these locations, Northrop, who elected not to exhibit their age drastically. The organizers aimed high, the proliferation of shows and escalation of wares at San Diego. Said one industry openly challenging the long-established in costs have stretched the advertising al representative, "W e think there are more sellers than customers." However, over 300 U.S. and foreign companies did participate in the Brown Field display, including Gen eral Dynamics, Hughes, and Teledyne Ryan. Their booths were housed in "high- tech tents," 525-foot long, 100-foot wide aluminum-framed translucent fabric- covered enclosures that appear adaptable to indoor model flying! One of the many ceremonies held during the 10-day event was the U.S. A ir M a il ser vice 70th anniversary commemoration. Is sued during the show were new 36-cent air mail post cards featuring the Douglas DC-3 and 45-cent airmail stamps honoring Samuel P. Langley. Keynote speaker Bill Chana, of the San Diego Aerospace Museum, pleased us by including a discus sion of Langley's experiments with m odel aircraft! Outdoor displays encompassed a vast va riety of aircraft, such as RPVs (Remotely Part of the nine-plane Canadian Snowbirds team at rest in the early morning fog before show. Piloted Vehicles), gyroplanes, ultralights,
12 MODEL BUILDER In spite of its size, the An-124 accelerates rapidly. The four nose Up, up, and away! An-124 is in a climbing turn to the right immed wheels have already left the ground in this view. iately after takeoff.
Jim Alaback admires the display model of the An-124 presented to the San Diego Aerospace Museum by the Soviet delegation.
Craig Hosking's Double Take Pitts made upside-down touch-and-gos as well as landings. For takeoff from inverted position, pilot must NASA's unique Q SRA blown wing research aircraft demonstrates be hoisted into cockpit with internal winch. its remarkable high maneuverability and slow-flight capabilities. lightplanes, and military equipment rang aviatrix Cathy Grey and Astronaut Deke 260s, the USAF Thunderbirds with their F- ing in vintage from W W I through 1988. Slayton. The skies were also brightened by 16s, and the Canadian Snowbirds nine- Among the more unusual machines to be multicolored parachutes, which are now so plane formation. seen was the NASA QSRA (Quiet Short- controllable that they are flown almost like Additional participants included U.S. haul Research Aircraft). Featuring a hang-gliders. Aerobatic planes were every Navy Tomcats, National Guard Delta Darts, "propulsive lift wing" equipped with four where, ranging from a clipped-wing Cub to a B-1 bomber, and even a U.S. Postal Service jet engines, the craft can takeoff quickly, Bob Hoover's North American Sabreliner, jetliner. If a stealth fighter was there, we turn tightly, cruise slowly, and land in ex one of four different machines he brought didn't see it. ceedingly short distances. along. Round-trip hops in a French Concorde Flying demonstrations included Formula Team aerobatics contributed greatly to SST at speeds up to Mach 2 were also availa- I pylon races, enlivened by a good variety of the show and included two highly modified designs flown by colorful pilots, such as W a co UPF-7s, a trio of Siai-M archetti SF Continued on page 68
SEPTEM BER 1988 13 RAMBLIN’ AROUND AUSTRALIA By STU RICHMOND. . .Our ramblin' wreck marks a real highlight of his trip with an extended visit with Australia's premier modeler, Ivor F. Stu interviews Ivor and learns about his long history in modeling.
• The greatest model airplane organiza tion in the world is the USA's Academy of Model Aeronautics. It is free and indepen dent of the United States' government and is financially self-sufficient; it fosters model competition, manages scholarships, main tains records, enables rule making and up dating, maintains a museum, and its staff of nearly 50 people is dedicated to serving the needs of American model builders in pur suit of fun within this wonderful hobby we enjoy. The AM A is of such world status and recognition that I honestly hope someday its membership and administrative talents w ill totally be offered to the w orld's m odel building/flying enthusiasts to replace the present affiliation of countries with the FAI organization in Paris. FAI seems to revel in glory and patronage of full-scale aviation. The amount our AMA spends annually on FAI activities, including "franchise fees" paid to our National Aeronautic Associa tion for FAI affiliation, is absurd. In Australia I was privileged to spend con siderable time with Ivor F. (that's his whole name) who holds Australian aeromodeling Australia's premier model builder, Ivor F. stands before the world's largest collection of model license VH-1 which would be like having airplane magazines which date back to 1898! The model he holds is a Hangar Rat, built from Model Builder magazine plans. Stu's visit with Ivor was a major highlight of his trip downunder. AMA #1 for us. As you read Ivor's com ments, you'll see how he's making efforts to parallel the directions and accomplish ments of our AMA for model builders in Australia. Australia follows FAI model rules for international competition; but, for their own home pleasures, they have, much as we do, their own set of model flying/com- peting rules, outside the FAI framework. M y ram ble to Ivor's hom e was by appoint ment and included dinner with him and his charming wife Vera. I've heard of him for years in the model press, and a chance to spend a day with him, as arranged by host John Chadd, was one of my modeling high lights. Ivor is now a retired school coun selor who is a college-trained psychologist. He has spent a long time in model airplane activities and is Australia's first life member of their MAAA organization, the Model Air plane Association of Australia. My tape recorder got the following while visiting the club house built behind Ivor's hom e: Stu: Ivor, please tell me about this build ing we're in. Ivor's engine collection totals over seven hundred, including these made in Australia by Gordon I vor: W e had set our hearts on having our Burford. Ivor has made 1,000 Doonside Mills ,75cc diesels and 350 Sesqui engines of 1.5cc size own premises in 1947 when we began the to become the second most prolific producer in the southern hemisphere. Doonside Model Aero Club when I got Ivo r: About 1948 or 1949. open Saturdays 1:30 to 5:30 too. back from World War II. Stu: Ivor, how many kids do you think Stu: Do you sometimes get abused by be Stu: And you've had kids com ing through you've helped? ing used as a babysitter? this clubhouse since then? Ivor: Difficult to tell because I've also Ivor: You're one of the smart cookies, Stu. Ivor: Yup, for over 40 years, 38 at this very done it as a grade school craft activity. I sup •You understand! They w ant to, and I say, location. And this actual model clubhouse pose it totals a couple of thousand easily, "Look, I'm not a child minder. If you want was built in 1960. It took us eleven years to one way or the other. This clubhouse is now that, take 'em to the Boy Scouts or the Air raise the money to build it. open Wednesday nights 7:30 to 9:30. That's League. And, Dad, I want to teach you too, Stu: When did you start teaching model late enough on a school night. And this so I expect you to stay here with your child. building? Doonside Model Aero Club building is M y chosen task is to teach you an d to teach
14 MODEL BUILDER Sydney. Australia is one of the great cities of the world. Surrounding area has about 120 con trol line fliers, 160 free flighters, and about 2,500 R/Cers. Photo shows the Sydney Harbor bridge with the arched peaks of the opera house in silhouette. State has about 70 model clubs. As many as 2,000 children have been intro Please remember that MAAA has no staff duced to model building and flying through old then. Ivor was as delighted as I was to Ivor F.'s efforts and his Doon Bat glider kits. find it, from almost fifty years ago, and half like our AM A, but it is a virtual volunteer or Photo shows how balsa gets maximum util way around the world from Florida.) ganization. Present MAAA leadership ization by Ivor. Stu: Ivor, what are you going to do w ith seems to want to overlook this tremendous your child!" this collection? model library and the scholarship activities Stu: That's smart! Ivor, let's talk about the Ivor: Well, I suppose it belongs in a that it can foster. Ivor F. feels a bit frustrated model airplane magazine collection in this model museum, but I've put it together as a when he sees what our AMA does in building. I've never seen anything like it. Is service. You see, there's an old photocopy America for modeling. I learned that Ivor it the world's biggest? machine here too. I'd really like for the has also made a significant dollar contribu Ivo r: Ves, it probably is the w orld's big Model Aeronautical Association of Austra tion in the name "MAAA Scholarship gest and most com pleat when you consider lia to put a good photocopy machine in Fund," parallel to our AM A fund, but his do it has Model Engineer from 1898 (every is these premises. I'll do the work for nothing. nation had not been recognized due to ap sue). Yes, that's going back a bit. That, of Anybody who wants photocopy services parent shortsightedness to this date. The course, contains the records of the Model from this library could make a donor pay USA's 120,000+ membership allows activi Aeroplane Association of Britain, and it has ment direct to MAAA for a scholarship ties that Australia's 6,000 membership can't Edgar Westbury's designs in it. He pub fund, and I'd do the work and provide the yet enjoy. lished in that before there was an official copies direct to the donor. I'd really like to The Doonside Model Aero Club building publication for aeromodeling in Britain. In get this idea off the ground. I don't know is now a veritable museum. Hanging over November 1935 Aeromodeler began how I'll do it; it's gonna really be hard. head is a Comet rubber-powered Clipper, publishing. By in-depth interviews elsewhere in Aus Jr., a Chet Lanzo Record Holder, a Dynajet Stu: Do you have the first issue of M o d el tralia I'd learned before this evening that speed model, a twin pusher, a compressed Bu ild er? MAAA feels it should o n ly administer for air model, and many other treasures of Ivor: Nope. I have every issue except that modeling building clubs and individual af one, although I do have a photostatic copy filiations in Australia, unlike our AMA. Con tinued on page 74 of the first issue. I've advertised for that first issue. It's a very rare magazine and appar ently the publisher, Bill Northrop, gave away the first issues to introduce the maga zine. W here was /? Stu: How about R/C Modeler? D o you have the first issue? Ivor: Yes, I've even got a duplicate which I'll trade for a first issue of Model Builder. Stu: How about G rid Leaks? Ivor: Yes, they're all here. Stu: And Model Airplane News? Ivo r: Yes, they're all here too, bar one that somebody flogged off with. Stu: How about Aeromodeler? Ivo r: Yes, Aeromodeler is com pleat. I've got Number One of Volume One that I got from John O'Donnel. That John O'Donnel; he charged me about $100, if I recall correctly! Stu: This is a trem endous co llectio n and a treasure of the aeromodeling world. (At this point I slid out the M o d el A ir p lan e N ew s issues for 1939 and there found q u ickly a picture of me holding a 10-cent Here's one of the few dozen prototype Doon Fly U-Contro! models. Five hundred have been Comet rubber scale model. I was ten years mass produced to revive U-Control flying for Australian children.
SEPTEM BER 1988 15 comment, yet w ill run for the nearest tele phone upon hearing a model plane, no m atter how far away o r the actual level of its engine noise. 'Nuff soapbox. For you who did not like my little touch of humor, true as it may be, I can't answer you, as I didn't hear you too well, your radio is making too much noise! RADIO INTERFERENCE The subject guaranteed to strike terror into any R/Cer's heart is radio interference. Understanding it is almost as difficult as ac cepting it, and, in some cases, the source of interference is never really pinpointed and probably actually accounts for a lot of what is blamed as radio failures. Since we are not the only users of radio and electronics equipment, we are not the only ones plagued by what is known in the elec tronics industry as "RFI." As you will no doubt be able to deduce, that stands for Ra dio Frequency Interference, and unlike some of the abbreviations you run into now and again, is not something I invented, but the actual terminology of the professionals. It seems that even the big boys are not im mune to the evils of RFI. It is reported that the U.S. Army is having RFI problems with 2 iJ jt * 4 J 3 5 * By ELOY MAREZ its UFJ-60 "Black Hawk'' helicopter. As many as five of these machines, which carry a price tag of $6 m illion may have been lost • Eloy's Law as it applies to loud car stereos being issued weekly. I say good for the city due to RF interference with its flight control did not fall on completely receptive eyes of Sacramento, let us hope it starts a trend. equipment. Now that is a real case of "I ain't out there in the wonderful world of MB I am aware that we R/Cers are not com got if! readers. No doubt you will know immedi pletely clean when it comes to noise, and I In this instance, the reason is known. And ately the persons who did not appreciate applaud the efforts of AMA President Don that is always the first step towards finding the reference. Anyway, there is a late devel Lowe and others who are trying to keep us the cure. All these problems have been hap opment on the subject. from becoming more of a public nuisance. pening in Europe, in the vicinity of where According to our local newspaper, the On the other side of that particular coin, I some extremely high-powered Radio Free city of Sacramento, California, has passed could accept model airplane noise com Europe transmitters are located. These and is enforcing an ordnance against ex plaints with more tolerance if I could un transmitters are aimed, which you can do to actly this type of noise pollution. The arti derstand why John Q. Public will tolerate a radio signal, towards the Iron Curtain cle reads that an auto stereo that can be loud auto stereos, loud autos themselves, countries and generally operate on interna heard from a distance of 25 feet is good for noisy motorcycles, noisier lawn mowers, tional shortwave frequencies between 5.95 a fine of $100, and that 25 to 30 citations are ear-wrecking chain saws, etc. with never a and 26.10 M H z . They require a lot of power, as their signals are jam m ed at the other end and only brute force gets through under those conditions. A contribution to the problem is the helicopter itself, the first one that is electri cally controlled rather than in the more traditional fully mechanical way. In other aircraft, especially the early ones of this type, this method was referred to as "Fly By Wire." In such systems, instead of cables, rods, or hydraulics making the connections between the pilot's controls and the flight surfaces, the pilot's commands are trans formed into electrical signals and sent by wire to remotely located servo mechanisms which then actuate the controls. Not unlike what we are doing, except without the ra dio link. And fellows, I don't know these control systems in great detail, but I know one thing: it's PCM! Actually, there is a lot of "PCM " elec tronics available to us now, in many forms. PCM is our use and terminology, which by the way is correct and not another one of those word "inventions" I mentioned earlier. It refers to the conversion of an elec trical signal into computer "bits" (and "pieces" if you get RFI!), and the same thing is being done in digital television, digital New from Futaba for retract gear applications, the S136G 180-degree servo measures only 0.87 by 1.75 by 1.00 inches and weighs 1.48 ounces, with a power output of 76.4 ounce/inches. Continued on page 88
16 MODEL BUILDER MODEL DESIGN & TECHNICAL STUFF By FRANCIS REYNOLDS
• Good morning, class. Welcome back to the one-room school house. Today's lesson isn't in your textbook. W e are going to cover new ground! It is both academic and very usefu I. Wrong guess. It won't be about load- ing dice. "Wing loading," the weight of the air plane divided by the wing area, is a useful parameter when comparing the perfor mance of two equal-sized airplanes or in examining the effect of changes to be made on a particular airplane. But, here is w here its use should end! Wing loading is a mis leading thing to use when comparing air planes of different size. The problem is that the wing loading is and should be higher for large planes than it is for small planes. This frustrated me as a Boeing engineer, and it has frustrated me as a model airplane designer and builder. Weight is proportional to the volume of the plane and therefore acts like a cubic function of size. Area is length times width (span times chord), or a squared function of linear size. In wing loading then, we have a cubic term divided by a squared term. Therefore, wing loading is directly propor tional to size. It is not due to Reynolds num ber of anything but plain (and plane) arith metic; a branch called dimensional analysis. If we insist on building a scale model air plane w ith the same w ing loading as its full- scale prototype, it will have to fly at the same velocity as the prototype. No thanks! Darrol Stinton's book, The Design of the A irp lan e, shows that for true scaling, veloc ity should vary as the square root of the scale. That relationship tells me that if an airplarie cruises at 100 mph, then an ac curate 1/8-scale m odel of the same plane should cruise at 35 mph. Fortunately, there is a solution to the problem; a comparison figure that works perfectly, regardless of size. All we have to do is use w ing cube loading instead of wing area loading. At least one other modeling columnist has recognized the problem and the nature of the solution, but didn't carry it through to completely useful proposals. Wing Loading Chart. See text for explanation. I believe the earlier advocate proposed calling it "wing volume loading." I don't re well, since the results are dependent on Incidentally, modelers sometimes ab member what dimension he proposed to aspect ratio (inversely proportional in one breviate span as "s" or "S," and area as "A." use for "height." For simplicity, one might case and directly in the other). A third Full-scale designers universally use "b" for use average chord or the span as the mul dimension that is independent of aspect ra span and "S" for area (Surface). The "b" for tiplier to convert area to a cubic function. tio is the average of span and chord of But it turns out that neither of these work (b=c)/2. To simplify things, I drop the two. Continued on page 69
SEPTEM BER 1988 17 • The U.S. Navy's air exposition was held negative. problem by utilizing multiblade rotor sys May 21 and 22 at the Glenview Naval Air The X-Cell might weigh 8.3 pounds on tems, but in a model these are expensive, Base outside of Chicago, Illinois. Besides the m oon, but here on earth it came out to hard to track and balance. So keep those the demonstrations of full-size craft, includ over 10 pounds. As well as it's performing, I helicopter engines within "sane" limits. No ing the F-14 Tomcat, some vintage biplanes, w ouldn't want it any lighter. There are limits .61s in a .40-size machine, .90s in a .60-size, T-34s, T-6s, and an aerobatic performance in the weight/power equation for a h elico p etc. by a Pitts, there was a static display and fly ter. Too light and it's not going to handle the Bill Curtis of Tech Specialties is very high ing model airplane demonstration by the wind well, and it won't land easily. Overpo on the Airtronics gyro. He passes along this Lake Shore and Skylarks R/C clubs. Datu wered choppers don't have enough rotor recommendation: Mount the gyro on three Ramel of Chicago flew his Schluter Cham blade area to absorb all the energy gener layers of 1/8-inch double stick foam tape. pion with a foamboard "profile" fuselage of ated by the engine. Longer rotor blades Set the gain to about 70 percent. The foam a Huey Cobra (the hit of the F3C team trials aren't a solution because (1) they have prob tape will insulate all the extraneous vibra in Dayton, Ohio, last year). I flew my X-Cell lems with going supersonic at the tip and tion from the engine, drive train, etc. and and Star Ranger. Nothing spectacular be (2) a longer helicopter can't maneuver as only pick up the rotating tail movements. cause both of us were very concerned well. You must remember that the most effi A note about double-stick foam tape: I use about flying so close to all those spectators. cient rotor (or propeller) is a single blade. it for everything and so should you. It's the The public's fascination with our helicop The more blades the less efficient the rotor best way to attach a switch harness. On my ters didn’t match that of the Navy person disc. Simply increasing pitch won't do it be X-Cell, the radio and gyro switches are nel, who went bananas over our machines. cause the aerodynamics of a helicopter- taped to each other, and to the servo tray. I W ho were the most fanatic? The guys who drag, and the retreating blade phenomena can easily reach through the top of the fly the real ones, particularly the Huey pi —put limits on the pitch that can be used ef canopy and flip both switches. On my lots and the jet jocks! fectively. Full-scale choppers deal with this Heim Star ranger, I have them taped to the PERSONAL FLYING NOTES That combination of the X-Cell, Air- tronics, Spectra radio (with the new double ball bearing coreless Airtronics 735 servos) and the O.S. Long Stroke 61H side exhaust ringed engine has delivered some exciting flying this summer. I'm running 9 degrees pitch at top end, 5 degrees at hover, and negative 4 at low stick with plus 12 degrees on pitch curve II which kicks in automatically for autorota tions. This all fits comfortably within the mechanical limits of the collective pitch range of the X-Cell. The location of the swashplate at low pitch is well above the bearing block, so full cyclic swashplate movement is available at both high and low end. When set up for inverted flying, I had to forego the extra top end pitch for autoro tation, and was just able to get -4 to +8-1/2 for both upright and inverted while keeping the swashplate far enough above the bear ing block to get full swashplate tilt at full Datu Ramel's Schluter Champion-Huey Cobra on deck as Sea King performs.
F-14 Tomcat pilot LCDR Nick Kavouklis of Dallas, Texas, poses with Coast Guard Sea King chopper in simulated rescue attempt. author's Heim Star Ranger.
18 MODEL BUILDER Flight Surgeon "D o c" Colle of Denver flies the big one. One of the Navy's Bell UH-1 choppers open to the public. side of the fuel tank. Avoid any more perma 101 THINGS TO CHECK ON YOUR through the tap so it can be pulled out the nent installation, particularly on the CHOPPER other end of the muffler or continue to pull canopy or bolted to the fuselage. Switches Engine in the same direction hard enough to pull are very susceptible to vibration, and Engine, start shaft, clutch, fan, pulley—all apart the knot or bend in the wire so the usually are the first things to get destroyed must run true with no more than .002 inch wire w ill pull out or break. in any kind of crash if they're bolted to the runout at any point. Out-of-line or out-of- Do not use a pressure tap that only helicopter. Also I use double stick tape to balance engine assemblies cause a high fre threads into the wall of the muffler unless hold the receiver and battery pack, but not quency vibration which often causes the the wall is thick and there is a substantial by itself. I tape the receiver to a piece of 1/2- fuel to foam in the tank, may destroy the ra amount of metal to tap a thread. You still inch foam, and tape the foam to the servo dio and servos, and will eventually cause must use a permanent type loktite or epoxy. platform. I usually adda rubber band or two the side frames to crack apart. Radio-Receiver, Servos, Etc. around everything for some extra peace of Installation of the muffler pressure tap is With all the electronic spaghetti strung mind. By the way, the only double stick critical. If it comes loose or falls out, the loss throughout a helicopter, the condition of tape I use is Ace, either 1/8- or 1/16-inch. If of pressure to the tank w ill cause the engine the wires is very important. Neatness is the tape loses its tackiness, a little CA at to go "lean" and possibly seize up and quit. fine, but not a priority. W hat is important is taches it for good. It's funny the way Ace al The result can be a ruined engine and a that wires are protected against dirt and ways seems to sell the best of whatever crash. I recommend the "thin wall" pres fuel, insulation is in good condition, wires product they're offering, whether it's battery sure taps made by MAC and Miniature Air are not rubbing against wood or metal chargers, ESVs, tape, whatever. craft. They are installed from inside the edges and all wires are slack-nothing And on the subject of batteries, it's proba muffler and secured by a nut on the outside. stretched, taut, or binding! N ever connect a bly time I mentioned SR battery packs and If you can't insert small enough pliers or for wire anyplace that it doesn't reach com fort Larry Sribnik. SR Batteries (Box 287, Bell- ceps inside the muffler or pipe, an effective ably. In the event of a crash or even a hard port, N ew York; 516/286-0079) sells high- technique is to "fish" a thin piece of wire landing, you'll be glad you had that safety grade matched cells which are thoroughly into the pressure tap hole and out through margin. tested and are available in every conceiva the exhaust hole; then into the end of the Rotor H ead ble configuration. I have been using them tap, out through the bottom of the tap, end Blade balancing. About 99 percent of for five years, and truthfully I really don't ing with a bend, knot, or anything else to vibration problem s are caused by an out-of- think about them too much. I guess I take keep the "fish " on the line. The last step is to balance rotor disc. A shaking ta il is the most them for granted. They're the only batteries "reel in" the line, which is simply pulling common symptom of this problem, which I use. W hen Larry first started selling batter the wire out through the pressure tap hole usually has nothing to do w ith the tail at all. ies about five years ago everybody was talk until the pressure tap itself is pulled right Notice I said main rotor disc, not blades, ing about them. Now everybody uses them, into its hole from the inside of the muffler. because it could be the flybar that is out of but nobody talks about them. This doesn't Slip the nut on the outside end of the wire, balance. I use the following method to help Larry's business. So, come on, every the nut on the protruding end of the tap, balance the rotor disc: (1) Weigh each body, let's talk about them, not just use tighten it while keeping tension on the them! wire, and then either fish the wire back Con tinued on page 73
UH-1 does some precision flight demos. Crowd admires F-14 in background, models in foreground.
SEPTEMBER 1988 19 Photo 21. • Continued from last month: a busy and better year for the R/C Guff, P H O T O 21 and the equipment had been upgraded W ith in two weeks after the 1938 Nats again. crash, damage was repaired and the plane P H O T O 23 made two demonstration flights for a large Bill is holding the plane with rebuilt re R/C GUFF, airshow crowd at the Kalamazoo airport, ceivers, and on the ground is a new trans and later another R/C demonstration at mitter which runs from a storage battery- Battle Creek. genemotor voltage source and needs only TheLifeStoiy P H O T O 22 30 watts. That ends the problem of locat A new (and final) fin and rudder were ing 110-volt outlets within reach of our added later in the sum m er of 1938 to re 100-foot extension cord! By DR. WALTER A. GOOD place the rather ugly one damaged at the P H O T O 24 Nats. As Bill would be available for con The drawing shows the placement of a PART TWO tests and demonstrations, 1939 was to be new half-ounce escapement in the fin.
Photo 23. Photo 22(Above). Photo 24(Below).
20 MODEL BUILDER Photo 28.
I
Photo 30.
Bill is on the controls, and Ralph Littler and I are launchers. Photo 27. P H O T O 29 P H O T O 25 P H O T O 27 Here's the launching, almost ready for This is a photo of the new escapement This is the two-channel receiver used in release. This type of launching assistance mounted in the fin. Another similar one is 1939, w ith the two relays m ounted on the was necessary to prevent ground looping mounted in the stabilizer. facing panel. Often times we would tune caused by the forward placement of the P H O T O 26 the transmitter to the receiver to obtain wheels. The wheels were forward to pro This is a photo of the new escapement. more accurate tuning! Note the labeled tect the hand-carved propeller from being Note the size in relation to Walt's finger. battery lead clips. broken! A stronger engine may have in The ball bearing thrust washer for rubber P H O T O 28 sured a quick unassisted takeoff, but we models is located under the four-armed Time for the test flight. Here we are didn't have one. The Brown Jr. was just escapem ent rotor. ready for launch at the Kalamazoo airport. right once the plane was in the air, which
Photo 25. Photo 29.
SEPTEM BER 1988 21 Photo 33. Photo 31. is the equivalent to the .25 to .29 glow en PH O T O 33 gine of today. Gordon Light is holding the plane for PH O T O 30 Walt while FCC Inspector Emory Lee Here's Bill lining the plane up for the looks on at the 1939 Nats in Detroit. Lee landing; almost 100 flights at this date. was the man who asked Bill near the end PH O T O 31 of an official flight if he could try the stick. Not all flights are perfect! The wing was Bill asked him if he had a Ham license. cut off by a stubborn telephone pole. No Lee said, "No." Bill said, "Sorry." record (confession?) of who the pilot was! P H O T O 34 Pure pilot depth perception error. We both After a very successful 14-minute flight stayed up all night repairing. We flew with all maneuvers done twice, the R/C again the next day. Guff earned a strong first place among the P H O T O 32 eleven entrants to win the 1939 R/C Nats, Seen here is the general layout of radio and this demonstrated that R/C really gear in the 1939 configuration. See A ir works. What a happy day that was! This Trails (11/40, 12/40, 1/41) for details. was Bill's first R/C Nats, and he was the pi-
Photo 34. Photo 35.
22 MODEL BUILDER Photo 36. lot on that flight, but he did let me hold the trophy! This was our first "win" of the beautiful Edward Roberts trophy. PH O T O 35 ■ B - l mo J Here's the Edward Roberts trophy for our ' y a 1 L JP winning the R/C Nats. It is now on display —J5 I1 in the AMA museum. P H O T O 36 Of the five demonstrations made that summer, one was at the Midwestern States Photo 38.
meet in Chicago. Here I was the pilot and sumed he wouldn't be able to tell us apart! PH O T O 37 Bill was the coach. We always took strict Bill had the necessary Ham license at that Seen here is the Midwest field on "turns" as pilots, even when there was an time, and I didn't. (The photo here is by Cicero in Chicago. Nice tall grass for FCC Inspector present. Being twins, we as oldtimer Joe Lucas.) catching errant models! P H O T O 38 This is Frank Nekimken and Russ We ber, directors of the meet, congratulating Bill and me for the demo. (The photo here is by the late Joe Ott.) P H O T O 39 Here are Bill (right) and Walt (left) after the Midwest demo. (Photo by Joe Ott.) PH O T O 40 There I am starting the engine at the Canadian National Exposition in Toronto in August 1939, w here w e w ere invited to give an R/C demonstration for the modelers and the Exposition visitors. The crowd was so thick that the director asked Bill to stand on a box and call out his in tended maneuvers before they were exe cuted. Bill did so with convincing success. Later a gentleman came up to Bill and said, "Most of the spectators thought you were steering your plane by your voice, but I saw you use that little box in your hand!" This may have been the first R/C demo seen in Canada. Note that at that time the plane was using a Dennymite engine with a long ex haust pipe. Photo 39. TO BE CONTINUED NEXT MONTH! ·
SEPTEM BER 1988 23 me of the situation when turbines appeared at Indy. They were too good, so they were banned. If you want to see what your offroad car can really do, try the Astro cobalt 035 for a real eye-opener. Speaking of offroad, a few columns back I discussed the new generation of offroad stock motors, which are real powerhouses and a very good value for the dollar. Wouldn't you know, I forgot to mention By MITCH POLING something very important! One way these motors gained the extra power was by ad vancing the motor timing. This means the motors are "one way" motors. They must be run counterclockwise as you face the front of the motor; i.e., the conventional direc tion for right handed props. This is great for • I talked about the new Astro cobalt 020 direct drive, but watch out on gear drive! and 035 motors last time, but had not had Most gear drives will require the motor to any time to do field tests. I still have not had run the other way, and these motors w ill be time to field test the 020, but I have done a timed wrong. They will not deliver the lot of car running and some airplane flying power, and you will be disappointed. The with the cobalt 035. It is a real powerhouse, answ er is to use an Astro belt drive o r the Al- with performance equivalent to cobalt 05s Tech or DSC (One Wood Lane, Malvern, of two or three years ago. The efficiency Pennsylvania 19355; 215/644-6772) gear gain that I spoke of in the last column is drive, which do not require that the motor real, the larger brushes (the same size as the run "backwards." You could try to change 40 brushes!) account for most of it. I flew it the motor timing, but that is a real in the MRC Cessna 172 using a 6x3 Cox challenge because the motor back is held gray and a 6x4 Cox gray prop, and 800 and in place by tabs and cannot be rotated. You 1200 six-cell packs. The 6x3 prop gives could undo the tabs, rotate the back for the good sport performance and so do the 800 best rpm/current in the reverse direction, six-cell packs. The maximum performance then drill set screw holes to hold the back is with the 1200 packs and the 6x4 Cox gray in, but I have not tried it. M y apologies for prop. Flying weights with the 800 pack, forgetting to mention the timing, I did all three TSS10 Tower Radio micro servos (rud my testing with direct drive, so it slipped der, elevator, motor on-off with a toggle by me. switch), a 250-mAh receiver pack, and the Tower Hobbies' Lambda Peak Detector I am often asked what charger I recom Ace Olympic V (Silver Seven) receiver is 33 charger. mend, and I have reviewed several chargers ounces, 38 ounces with the 1200 Sanyo SC sponse. The standard 05 motors are work recently. If you have up to the 40-size sys pack. The climb with the 1200 pack and the ing very near their limits, and their power tems, I like the T R C Im pulse 4. If you are fly 6x4 prop is very fast, and there is so much response is not nearly so smooth. The car ing the four- to six-cell systems, there is an power that you can pull back on the stick in "flows" around the track with the cobalt; it excellent peak detector charger that is often level flight and watch it do consecutive is a pleasure to feel the instant and positive overlooked. It is the Kyosho Lambda Quick loops until the battery runs down! Typical response this motor gives. I keep coming up Charger sold by Tower Hobbies and Great flight tim es are four to six m inutes w ith on- with the words "smooth," "positive," Planes Distributors. The charger has ad off; an electronic throttle would give longer "so lid ," and "responsive." W h a t a car motor! justable current and a six-ampere ammeter flights. When I used the 1200 pack, the The kicker is that the current rules specifi to show the current. The suggested charge plane would get so high that I had to shut cally disallow cobalt motors! What for? rates are marked on the m eter for 250-, 500- down at least once per flight. They are a pleasure to drive! This reminds , 600-, and 1200-mAh packs. Voltm eter I drive offroad cars in competition, in six cell stock. My RC10 has gone through quite an evolution, and now is a very competitive machine. I do pretty well in competition, usually in the top three places in Class B. My favorite motor is the 2WD super stock Twister motor, and most of the winners at our local track are using this motor. It is a very good one, and I reported on it in a previous column. Of course, by the time you read this column, there may be another motor on top of the heap, but this one is it right now. Anyhow, I put the Astro cobalt 035 in the RC10 to see how it would do compared to the Twister. Quite a difference! The Twister is good, but the Astro cobalt 035 is better. The whole car "sharpens up," with crisper acceleration, higher top speed, smooth power response, better cornering, better handling on the straights, and it is much easier to "find the line." Why? The power band, or torque curve, for the 035 must be much w id er (flatter and m ore constant). It is being driven well within its power handling A 1931 Curtiss-Wright Junior by George Lucas, from Model Builder plans. Powered by an Astro capability, no peaks and dips in the re- Flight Cobalt 25, this 76-inch beauty is a great flyer.
24 MODEL BUILDER jacks are provided so that you can monitor the charge voltage with a DVM if you wish. There is a trickle charge output also for peaking up batteries. I find that the maxi mum current is about 4 amperes if I am charging a 1200-mAh pack. A six-cell 1200- mAh Sanyo pack w ill charge in 20 minutes, with a final current of about 3.5 amps. I ran a series of chargers and motor runs compared to the TRC pulse charger (the Lambda is not a pulse charger). The Lambda compared very impressively. Once the pack settled down and was broken in, it delivered 57.5 am peres x m inutes (60 amp minutes - 1 amp hour) from the Lambda charger, 59.5 am peres x m inutes from the TRC charger. These numbers came from a fairly high discharge setup, a DSC Thrust- master motor turning a Top Flight 8x4 nylon prop at an initial draw of 19 (20 amps for the TRC) amperes, which dropped to 9 (10 amps for the TRC) amps at the end of the run in 4-3/4 minutes. As you can see, the Lambda comes very close to the perfor m ance of a pulse charger. The charge cutoff The scene is float flying way down under in Australia. is very reliable; only .01 to .03 volt drop is needed to cut off the current. I have been using the Lambda charger for over a year, and it has never overcharged a pack, in fact, the pack is cool at the end of the charge. The Lambda can charge seven-cell packs, but at a slower rate. Initial current set at the maximum is 3.5 am ps; this drops to 2 amps at the end of the charge. This means that a 1200 pack w ill take 30 minutes or more to charge. The 800 or 900 packs should take less time, but I have not tested them. The Lambda is $79.95, part num ber K YO P 1045, and is available at Tower Hobbies, P.O. Box 778, Champaign, Illinois 61820; (800)637- 4989. I recommend the Lambda for those flying the 05 systems; it offers very good performance for a price a little lower than most peak detection chargers. And now to the readers: Roy Farren, who lives in Australia, sent neat photos of his Aqua Sport. This is a float plane design of mine that was published in RCM. Roy mod ified his plane a little and used two spars Australian Roy Farren, from Australia, sends these photos of his Aqua Sport. Here it rests on with webbing, D-tube, and cap strips for the wheels. Wing sheeting is 1/32 inch, all-up weight is 4-1/4 pounds. wing. (I used a single spar plus a wing tube and steel dihedral.) The sheeting is 1/32 inch! The wing came out at 6-1/2 ounces, very light. All-up weight with a Keller 25 and ten 800-mAh Sanyo AR cells was 4-1/4 pounds. The Keller turns a Taipan 7x6 at 12,000, lots of power. Roy built his plane in a hurry; he wanted to fly it at a float meet the next day! He succeeded in doing so, and the first flight, after all the hurry and ex citement, was something of an anticlimax! The Aqua Sport made a straight-as-a-die takeoff run, lifted off smoothly, and climbed rapidly. It cruised effortlessly at half throttle and glided well with motor off. Touchdown was what float plane flying is all about; "a light kiss and a smooth settle," to quote Roy! Water handling was excellent despite no water rudder. Thanks for the info, Roy! I have had several letters from very satis fied builders of the Aqua Sport, all of them have been very pleased at how easy it is to ROW and fly. It has been flown with as few as seven cells with an Astro cobalt 05 The Aqua Sport with its floats on. A Keller 25 with ten 800 mAh Sanyo AR cells turns a Taipan Continued on page 64 7x6 prop at 12.000 rpm. This is an easy plan to ROW. See text for more.
SEPTEM BER 1988 25 That's not even the bad news. The bad news is: It does not have a high-lift airfoil! W h a t ALL ABOUT Ken Willard has designed is an advanced trainer! There is no, I repeat, no way that this type of plane will qualify as a good basic trainer. And, of course, it would be unthink able as a primary trainer (you do know the difference; don't you?). I'm w illing to put my ARFS money where my mouth is. I'll give it credit for being lighter than the plastic ARFs; and By ART STEINBERG if you or anyone else suggests a plastic ARF as an entry-level model airplane, I w ill say • Quite often we tend to digress from a must have a high-lift airfoil. To recommend that you have sold your soul to the devil. pure discussion of ARFs and find ourselves a trainer without these prerequisites to a be 'There is no keeping back the surge of immersed in other topics of interest. These ginner is to doom him to either failure or ARFs coming more and more on the market topics are not totally unrelated to our else a very long, drawn-out training period (and heavily advertised in orderto reach the primary subject, as is demonstrated in our (even if he can find an instructor more pa naive beginners). If a person cannot make May column. At that time I undertook to ex tient than I am who has nothing better to do worthy enough use of his free time to build amine the requirements for a "suitable" R/C with his time). This is fair to neither the stu a balsa model or does not have a place to trainer. While occasional reference was dent or the instructor! build, then I w ill grant that there is a place made to the "perfect" trainer, in all candor I 'The Headmaster ARF has a wing load for ARFs, but this will never be true in must admit that I feel there is no such thing. ing of 19 oz./sq. ft. (okay, let's be liberal and regards to trainers! At least not plastic ones. There are too many variables in designing a say some builders can get it down to 17 Far better for the beginner to commission trainer to select just one model as the best oz./sq. ft.). Thus, it cannot fly as slowly as a for the job. However, in attempting to out couple dozen other trainers on the market. Con tinued on page 92 line some of what I considered to be impor tant specifications, I included wingspan, wing area, type of landing gear, wing di hedral, wing location, fuel system, type of construction, choice of engine, and color scheme for visibility. As is usually the case, not everyone can come to complete agreement on such a complex theme, and one person who found reason to disagree is someone who has devoted a great deal of tim e and effort to the study of this very subject. )im Waterman o f San Antonio, Texas, w rites: "During the 20 years that I have been in R/C flying, I found where I was needed the most, which is not in the various R/C con tests because they can get along very fine without me, likewise running a club. The most glaring and crying need has been help for the R/C beginners. / easily taught myself to fly with an old Smog Hog without an other soul in sight, but yet at least half of the beginners I observed (after joining a club) failed and gave up and were lost to our No, it's not an A R F, just the author's beat up old Buzzard Bombshell. The question: is this the hobby. It was unnecessary and almost un perfect trainer? pardonable because it wasn't due to their limitations. It was because they either chose the wrong trainer or were misled about which to choose. And, as the years went by, especially with the growing popularity of ARFs, the situation became worse instead of improving. I cannot reach a ll beginners before they make a heart breaking mistake, but I know it to be an ab solute aeronautical fact that a John Q. Be ginner, age 25 to 30, average IQ of 99, can struggle for up to six years (the only record that I am personally familiar with) with a pa tient instructor (but the wrong "trainer") and still not solo until switching to a real trainer (and then soloing the same day). "It is fairly well-known that a trainer must have a high wing with dihedral (the more the better). Knowledgeable fliers know that the larger a model is, the easier it w ill be. Where there seems to be, strangely enough, a lacking even among fliers who should know better, is that to fly slowly, as an easy-to-cope-with model must, it must be: (1) as light as possible (heavy planes The Efthrebe, a ready-to-fly sailplane from Ed Cutler Plastics, shown here in its floating stab must fly fast just to stay airborne), and (2) it ilizer configuration.
26 MODEL BUILDER JOHN G 05 These John G 05 engines are one of the world's finest examples of metalsmithing. Engine is running at 3550 rpm idle in this shot. ing engine with a gear reduction unit aimed from Jan's letters, a separate column VITAL STATISTICS: Only 1-1/2 inches at 200-mph speeds, a four-cylinder .080 eventually. long to the prop driver, 1 inch wide cubic-inch with the axis of the four cylin I think all inventive/creative genius must across the mounting lugs, 1-3/8 inches to ders arranged in lin e around the axis of the run in cycles and comes back to established the top of the cooling fins. Displace crankshaft with its 12,500 rpm giving norms with regularity to get mental rest be ment is .03 cubic inch. Exhaust systems 50,000 firings a minute, and a .60-size 10cc fore taking off again on mind-boggling add 3 inches to R/C version, and 1-1/8 more sophisticated R/C version of the same futuristic ventures. This month we've inches to normal. R/C weighs 31-1/2 configuration which he calls the John Quat- caught the results of Jan's cycle of rest with a grams, and normal weighs 25 grams. (28 tro Axial 10ccm. These unique experimen grams equals one ounce.) Speed range tal engines are worth, along with quotes Con tinued on page 66 from over 17,000 to under 4,000 rpm. Homemade in tiny volume. UNIQUE FEATURE: This is one of the world's finest model airplane engines and uses a re-machined Cox #1032 glow plug for ignition.
• Back in the February 1985 colum n, I showed you a trio of tiny jewel-like diesel model airplane engines made by Jan Garcic in East Europe. There was a "Normal," a "Racer," and an "R/C" version, and the in coming mail concerning these .0 1 8 cubic- inch miniatures was so heavy that I called our publisher to ask how to handle it. These three engines came up with the initial "30- point rating" for excellence in design, man ufacturing, and performance which this colum n seldom awards. A few of you were lucky enough to end up owning a John engine. (John is the Amer ican translation for Jan.) Since that time Jan's fertile mind and golden hands have created several jewels of craftsmanship in cluding a "V-geared twin R/C diesel, a .40- A common straight pin is the start of the carburetor construction. Glow plug is a re-machined size rear intake, rear exhaust FAI pylon rac Cox part no. 1032.
Te« '
Exhaust system is shaped like Magic Muffler which boosts power One-inch ruler gives size reference. John G 05 R/C in foreground and over a very broad speed range. Stu didn't use pressure nipple for John G 05 normal in background. test running.
MODEL BUILDER 27 like a Piper Cub, have floats that seem to droop. This is from the negative angle that allows the plane to float in up-nose position. Before closing out this discourse on twin floats and long planing hulls, always be sure to locate the float set at least half an inch ahead of the model's center of gravity. This does help to rock the m odel back on takeoff I ' Bypm JOHN POND m m and make flying off water much simpler. The lake, located next to the R/C flying strip, can be seen in Photo No. 3, showing • This month our lead article will feature floats, the centerline of the floats must be at SAM 21 Newsletter Editor Steve Roselle old timer models on floats. Hydro models a negative angle compared to the center- handing this Lanzo Record Breaker to hel have always been fun events as evidenced line (or thrust line) of the fuselage. per Dave Lewis also of SAM 21. by one of the first at Oroville Dam Site in Long planing hulls employ this same line If this Record Breaker looks familiar to Northern California. Since the leader in this of design. In many cases such as McGov some of the readers, it is actually Don Be- type event, Hal Cullens, moved to Loui ern's design of the Piranha, the Berkeley kins's old model that he sold off in favor of siana, no further hydro meets were held. Custom Cavalier, and others, the engine the Gas Bird and later, the Lanzo Bomber. It remained for SAM 51 to revive interest pod over the wing is actually set at about Steve has had more than his return. in this phase of old tim er flying by staging a two degrees upthrust. This gives the effect A successful three-float model is seen in fun-fly type hydro event at their Bill Barton needed between the float line and the en Photo No. 4, a Powerhouse using Bunch Memorial O/T Meet at Mavis-Henson field gine as noted for the twin float airplanes. "sled-type" floats as built by Gene New located near Woodland, California. This This is no great secret but most of the comb. The floats appear to be the same terrific field, which includes paved areas, modelers (writer included) made the mis Bunch floats as were marketed by Joe Bridi, shaded malls, a short order eatery complete take of using the positively angled three quite successfully used. The model is being with inside plumbing in the rear of the floats used successfully in free flight weighed by longtime friend and S. F. Vul building, and an excellent fenced ground models. What people fail to understand is ture member, Tom Smith, who moved from gravel parking area, is the "Best in the that free flight models are so lightly loaded San Jose to the Sacramento valley foothills West." Response was most encouraging, they literally jump off the water. In actuality, in his retirement. Tom was a first-class with photo coverage of this get-together ap if the tail raises too quickly, the model will sheet-metal man who ran a very successful pearing in the May 1987 issue of M o d el taxi a considerable length of distance be business in Santa Clara County. Builder. A good variety of hydro models fore breaking water (if at all!). Looking at three-float setups again in were seen; three-float types, long planing In summary, with the engine set in a rela Photo No. 5 showing a Gas Bird on flights hull, and surprising (to a free flighted the tive upthrust position to the float or hull and Don Bekins assembling same, when heavy use of twin floats. line, the model literally flies itself out of the making three-float types, "sled" or flat rec This was no different in this year's m eet as water with the engine pulling at an up tangular types, are the order of the day. Al Photo No. 1 depicts Robin Pharis of Fol angle. though the floats "appear" adequate on Be- som, California, with aGHQ-powered Chet Getting back to Photo No. 2, attention is kins's model, close examination w ill show Lanzo RC -1. The floats are a local product by drawn to the fact this RC-1 is a GHQ- they w ill not displace enough water to keep K-Ron of Sacramento cut entirely from powered hydro model. Talk about opti the nose up. Bekins had his troubles that foam. mism! The writer simply had to act as me day and did not get the model off. In a heavy The floats then are reinforced by 1/64 ply chanic and timer to see if this model would wind, high pylon models are tough enough wood veneer on the bottom to withstand take off. to handle let alone on water. As Steve water impact. The rest of the mounting is With a stiff wind and choppy water (two Roselle observed, 'The floats looked like simplicity itself as vertical plywood are bu deterrents to successful R.O.VV. operation), Dutch shoes and acted like them." One ried at least 1-1/2 inch deep in the float and the model simply settled in the water and more shot (Photo No. 6) of hydro models epoxy glued in place. proceeded with the GHQ turning 4,000 and we will get on with it. Seen is Ken This can be seen very clearly in Photo rpm to chug along until an up elevator com Myers with a Lackey Zenith on floats. Note No. 2 showing the type of landing struts and mand was given. Talk about a surprise! Even that two sled-type floats are used here. Un cross pieces needed to make a stable float with this underpowered setup, it still took fortunately, Ken decided to fly it first as a platform. off gracefully. Proof the pudding on float land-based model. At 500 feet or better, the M ost people are aware that som e tilt must setups. model suffered a radio failure with the re be put into the floats so that they w ill plane If the reader is not yet convinced, take a sulting spin completely demolishing the off the water. However, in the case of twin look at the real aircraft. Most light planes, model. Too bad, as we would have liked to
1. Robin Pharis with his successful Lanzo RC-1 at Mavis Henson 2. Proof of the pudding! A closeup shows a GHQ engine in the nose Field and Lake. of the RC-1.
28 MODEL BUILDER 3. A good-flying Lanzo Record Breaker on floats by Steve Roselle, 4. Gene Newcomb's Enya 46-powered Powerhouse is being weighed member of SAM 21. by Tom Smith, SAM 51 official.
5. Don Bekins with his 8-foot Gas Bird converted to a seaplane. Float 6. Ken Myers came up from Los Angeles to enter his Lackey Zenith shape was not successful. on floats. Treasurer of the M.E.C.A. This columnist, 1. Eut Tileston W esterner O.S. .60 1001 having passed 71 years (young!) is hopeful 2. Gene Newcomb Powerhouse Enya .46 831 he w ill be ab le to feature most of the o ld en 3. Steve Roselle Record Breaker O.S. .60 487 gines, rare or otherwise, that abounded in 4. Doug Barton Long Kail .45 291 those pre-WWII and post-WWII years. A 5. Robin Pharis RC-1 GHQ 217 tremendous outpouring, especially after see how the floats worked. engine, the Clipper XX770 as so kindly the war. Tough break for Ken, as he drives over loaned to us by that magnanimous engine Not too much information is available on 500 miles from Los Angeles to attend the collector. Bob McClelland, Secretary- the Clipper engines, hence, we have had to many Northern California meets. As can be seen in the background, this field is an ex cellent site. Just too bad the mosquitoes are so numerous. Inasmuch as rice is the main commodity grown in the Woodland area, the stagnant w ater required by rice is a natu ral breeding place. This writer missed most of the contest as he was bitten on the eyel id. With the eye rapidly swelling, Pond decided to leave quickly for the 120-mile trip home before all vision disappeared. This meet featured all standard SAM R/C Events plus Texaco Hydro, Electric L.E.R., and Ohlsson 60 Event. In the latter event, Howard Osegueda, seen in Photo No. 7, is the leader of SAM 00, a new SAM Chapter. Howard is posed with a Lackey Zenith that flew well enough to garner a third place. Not bad for the first time out! We won't list all the results, but feel the Texaco Hydro is worth looking over for types and times. In closing off, the 1988 W in n e r of the B ill Barton Memorial Trophy was Eut Tileston. O nly the standard SAM Events were used to compute the winner. ENGINE OF THE MONTH 7. A standard version of the Lackey Zenith by Howard Osegueda, guiding light of the new SAM This month we feature an extremely rare Chapter 00.
SEPTEM BER 1988 29 9. Happy owner. John Pond, and builder. Bob Munn pose with the Bowden Mallard with Spitfire markings. The Mallard looks like the real thing. It's powered by a Rossi 60. glean what information we have from re As usual, this was another California en and also buddy in Australia, saw the plans ports appearing in Tim Dannel's Model En gine company (seems there were hundreds) and was agreeable to framing the model. In gine Collector Journal. that knuckled under to the pressure of sales a remarkably short time, Bob had the model This engine first came to this writer's at by the large manufacturers; Ohlsson, At back to Pond for final trimming and radio tention in a very early issue showing the wood, et al. With the flood of money over installation. Clipper Generator model. This was actually by 1948, competition for the dollar was too Seen in Photo No. 8 is a shot taken on the an internal generator (not magneto) that much for survival. lawn across the street. Also seen in Photo was produced in very small quantity. Ac FIRST BRAGGING RIGHTS No. 9 are the jubilant conspirators in this cording to the designer, Hugh Gunter, six Ever since this writer acquired Xerox co project, Pond and Bob Munn. engines were assembled for testing. His pies of the Col. C. E. Bowden book, Petrol Pond, with his penchant for decoration, partner, who remains anonymous, was said Powered Model Aircraft, published in the decreed the model to be finished in white. to have assembled a few more. These en 1937-38 era, this writer has been drawing From there on, it was a bit of research into gines were run and flown. up plans to most of Bowden's models which the books on early Spitfires to arrive at the The Generator model did not reach full have "a lock-on for ugly." This is standard cocardes and identification design. Al production status, as it appears the bearings joke about most Bowden designs; they were though ailerons are marked out, this is a employed were also used in the defense in designed to fly, not to look pretty. three-function radio model; no aileron dustry during W W II and the Korean War. Imagine the surprise generated when I operation. Lettering on the side was taken Apparently there seems to have been four received a Xerox copy from Alex Imrie with from a Spitfire marked JEJ on the dust cover models, the Generator, the generator-less some Bowden models not presently drawn. of the Harleyford book on Spitfire. W hy not model, and the dual combination of the ig Among those was the Mallard, looking not make it JIP (John I. Pond initials)? nition and glow head types as first adver unlike a Supermarine Spitfire. Drawing was O f course, the registration number N251 tised in the January 1952 Issue of Model Air no easy chore, as every rib had to be plotted is simplicity itself with N standing for plane News. The advertisement shows a individually as were the elliptical fuselage United States registration and 251 the glow plug and ignition combination that formers. With a planked fuselage and ellip owner's AM A number. What the heck? Fora was not exactly correct, as the glow version tical wings and tails, this was a formidable stand-way-back-off scale, it doesn't look too came with vertical finned heads. model to construct. bad. The customer was given the option of Bob Munn, good friend from San Diego At present, the model is powered by a using a head suited for spark plugs or glow plugs while the second, known as the "Fir ing Head" was a specialty design fitted with India mica to form a spark plug; practically indestructible according to the manufac turer. This plug was not made of porcelain, is non-fouling, and lasts indefinitely. A boon for those flying control line models. Specifications of the engine reveal the en gine is about the same size as the Baby Cy clone, the engine that had tremendous in fluence on many subsequent engines. Weight was eight ounces. The engine was manufactured using a high-silicon aluminum die-cast crankcase, an all-steel cylinder with ground and lapped hard chrome piston. A one-piece hardened and ground hard chrome-plated crankshaft was supported by a special "lifelong" micro-finished main bearing. A forged aluminum connecting rod was in corporated. An aluminum gas tank was at tached to the rear of the crankcase. Sold for the competitive price of $ 1 1 .9 5 , the Clipper Manufacturing Co., 5632 Lex ington Avenue, Hollywood 38, California, urged the customer to order direct (ala Baby C yclone). 10. Beautiful shot of a Bay Ridge Topper by Andy Anderson, SAM 27. Photo: Nevels.
30 MODEL BUILDER Rossi .60 glow intended for the SAM Event, Antique Glow. Provisions have been made for a removable firewall so as to switch an O.S. .60 four-cycle engine in the nose for the Texaco Event. It's going to be fun! SAM 30 For a change; this writer did not win the Twin Pusher event. The only regret he has is that he missed out on a case of beer. How ever, consolation prize was a six-pack. The boys in SAM 21 still had some refreshments in the warm afternoon. Nick Nicholau wanted this writer to ac knowledge a most generous donor to the SAM 30 Contests: Pete Huckins, the local Budweiser distributor. Pete, a model en thusiast himself, has been into old timer fly ing for the last five years. He dearly loves to watch those old twin pushers fly, especially in a mass-launch where every model goes every which way. Worth noting at this contest was the spe cial Electric Texaco Event which drew 12 entries. In a flyoff, Al Ward beat Tim Gund- lack w ith a flight of 16:29 to 14:39. Don't anyone say that electric models (despite their weight) don't soar. Gas Texaco was even more hotly con 11. Hey! I did it! Skye Greenawalt displays the proper enthusiasm for placing at the NCFFC tested w ith four 45-minute runs, forcing fly- meet. Photo: Bekins. offs at 32:43 (Kaminar), 28:28 (Bekins), With the columnist's Ford LTD Station literally jumps off the board with torque 11:58 (Bruner), and Lane at 3:54. Tough Wagon as background, Skye is literally say making it bank to the left. Probably the event to win! ing "I beat Pond out of second place!" Don most surprising thing about this flat wing SAM 27 is justifiably proud of this young flier, as this layout with upturned tips is the stability of Received the SAM 27 newsletter featuring was his first contest. Now that we have him the design. Frank Zaic captured this (or sim "Andy" Andrews version of the Bay Ridge hooked, all we got to do is to keep him away ilar) model in his 1938 Year Book. Interest "Topper" as the cover photo. This writer from cars and girls. Fat chance! ing layout. was so struck for the good art work, he im SWEDEN SAM 86 mediately contacted Ned Nevels (SAM 27 We are still using those good photos sent We always look for a spot to put in the photographer and graphic arts man) to re in by Stan Persson of Halmstead, Sweden. SAM 86 Newsletter portion of "Foolish ceive a photo for this column. Seen in Photo No. 12 is Nils-Olof Gustavs- Questions" as have been induced by the lo Two photos arrived very shortly there son with a 1938 Magnusson Wakefield. cal hobby dealers. Try these on for size: after. This writer selected the one that was In a writeup on the 1938 Wakefield con Q: Did you get any frog legs in yet? not used in the SAM 27 newsletter (not be test, Aeromodeller magazine reported this Q: Do you sell trampolines? cause the other had been featured), but this design was the big surprise of the meet held Q: I need one of these diamond head Photo No. 10 appeared to be the better for in France with its terrific climb. needles for my phonograph. . . details. As can be seen in the photo, the model A: I don't think we carry those. As can be seen, this is a radio control adaptation of the old free flight plan. For those contemplating the construction of this Scotty Murray design, one would do well to study the photo. Those building the "Answer," which was the Model Airplane N ew s construction article (based on the "Topper") can also gain an insight from the photo. Also from SAM 27, Don Bekins sends in Photo No. 11 of his protege, Skye Greenawalt, celebrating his second-place win at the NCFFC Contest at Waegell Field.
12. A 1938 Magnusson Wakefield by Nels- Olof Magnusson, Sweden. Quick takeoff!
SEPTEMBER 1988 31 Q: What do you mean? I bought it here last tim e... A: I think you may have us confused with Westside Electronics down the block. Q: No way. I'm sure I bought it here! Q: Do you sell Santa Claus suits? Q: Do you have a motor for a 'GT Chevy gas control? Q: Do you carry any insects? Q: Do you have any candy-making supplies? Q: What kind of propeller do you have that would fit the hat on my "benie and Cecil" doll? Q: Do you have blank music notebooks? Q: What R/C car can I buy for under $5? Q: Do you sell jumping beans? Q: Do you have any of the Porsche plastic kits? A: Yes, we have a few different ones. Q: Which one would I like? 13. Old time control line is growing by leaps and bounds in Australia. Bruce Abel with Hot Rack, Q: Do you have any wine bottle corks? with Frog 500 power. Took First in SAM Australian Championships in 1987. Q: Do you have assembled plastic model SAM AUSTRALIA cally for the Drone Diesel engine also be kits? Our old friend, Bruce Abell of 17 Fergu ing marketed by Shulman. Leon won quite Q: Do you sell electric football men? son St., Cessnock, N.S.W. 2325, sends in an a few stunt contests with this particular Q: Do you carry "Airtrinonics" radios? other photo (N o. 13), this tim e an old tim e m odel. Q: What's the difference between a 6V control-liner named "Hot Rack." This de and a 7.2V battery? sign by Leon Shulman was designed specifi Con tinued on page 99
14. Old Warden Day and it is Henry J. Nicholls and son, Richard, dis- 15. A Kloud King built by Dick Tanis, New Jersey. Built in 1971, this cussing the Mercury with interested friends. Photo: Imrie. model is in excellent flying shape.
Old Timer of the Month CARL GOLDBERGS FAMOUS'ZIPPER'
Design by: Carl Goldberg Plan by: Phil Bernhardt
• The “ handwriting on the wall” ap you imagine what would have happened 16. Bill Preston, Washington, wiht his latest peared in the July 1939 issue of Air if someone had proposed 7 seconds in hot one, a Sky Devil-powered Sailplane. Trails. Carl Goldberg began an article those days?) entitled “ The 1939 Gas Model,” with The design Carl described was, of these words, “ When the thirty-second course, his famous Zipper. Advertising motor ain rule was adopted early in for the Comet kit had already appeared, 1938, the boom of large gas models for and for years to come, this pylon ship, competitive work was sounded.” with its high center of lateral area (a Carl went on to explain the theories total departure from the then popular behind the design he had created, a existing theory), was to completely model which could handle the power of dominate the contest scene. a big engine that would be required in Other important design changes have 17. Would you buy ausedcar from these guys? order to get as much altitude as possible John Gates with transmitter and Rich Martin with the new “ short” engine run. (Can Continued on page 107 with beard.
32 MODEL BUILDER SEPTEM BER 1988 FULL-SIZE PLANS AVAILABLE-SEE PAGE 106 33 By BILL FORREY
• Every year the Inland Soaring Society of Statistically, more than half of the 28 Riverside, California, hosts a major radio models flown, 16 by actual count, were control hand-launch glider contest at their original designs. O f the remaining models club flying field. It is traditionally held on about half again were modified kits or par the first weekend of )une at the University tial kits which are available commercially. Middle School athletic field. This year that O nly about one-fourth of the models flown worked out to be June 5th. were stock kit gliders. This tells me that Twenty-eight pilots flew their AM A Class there is a lot of experim enting still going on A (1.5 meter span) sailplanes in this year's in the field of Class A model design. In what event, making it the fifth annual ISS RCHLC other glider category can one see the re held at this site in as many years. The atten sults of one's ideas in such a short time? The dance was down somewhat from previous average RCHLG glider can be built and cov contests, but next year this should improve ered in a week, test flown in an hour on with better advanced magazine publicity one's lunch break, and enjoyed literally (i.e., some display advertising). M o d e l anywhere and anytime. B u ild e r magazine has agreed to donate the The winner of this year's championship space and the trophies (again) next year as a (can I get away with that?) was Joe Wurts. Top view of Wurt's no-name model. Wing is means of supporting the event. Joe's name is certainly familiar to anyone foam core and fiberglass, covered with car Publisher Bill Northrop has told me that who reads this column with any regularity bon fiber tow stringers as reinforcement. he sees RCHLG as a highly visible, rela because he w ins just about every contest he Joe came to this contest one week after tively simple and inexpensive way to get enters. He flies nothing but his own original setting an FAI world record and two AMA people involved in R/C flying (and I agree). designs, and he has a good eye for what flies national records for Unlimited Class R/C Model Builder has traditionally sponsored w ell. gliders. He flew his "Moby" cross-country the trophies for this contest and, by means of this column, the post-contest exposure as well. Next year this contest is going to be the biggest and the best. Trust me, and build a glid er for it! I'll be there, and m aybe yo u'll be the one with your picture in the m agazine! As usual, the ISS RCHLG contest drew en tries from as far away as Chandler, Arizona; Albuquerque, New Mexico; Las Vegas, Nevada; and (for the first time) Portland, Oregon. These guys came just to be able to pit their designing, building, and flying skills against the best hand-launchers in the West. The dedication of these modelers is truly admirable, and it shows what kind of attention this event can bring in the AMA community. Due to its size, model industry support, and publicity, this event really should be classified as a national champi onship. If participation by three countries makes an event "international" by FAI defi nition, then participation by four states should make this event a "national" one! I'm in favorof changing its name! Nowon to The Fifth Annual ISS RCHLG contest drew 28 competitors, fewer than last year, but more this year's contest: fierce competition.
a J M s
Ten of the top 11. CD Ian Douglaslat left) placed 8th with a Para phrase. Left to right, kneeling: Joe Wurts, 1st, Dennis Brandt, 2nd. J Dick Odle, 3rd. Top row: John Lupperger, 4th, Garth Warner 6th, Joe Wurts, flier extraordinaire, and winner of this year's contest. This Allan Guthmiller, 5th, Gary Anderson, 7th, Craig Robinson, 10th, is the end of his round one flight, a mid-air collision didn't stop him and Don Nigg, 11th. Missing, 7th, Gary Anderson. from getting the longest flight of the day, and the most applause.
34 MODEL BUILDER V
Fourth place John Lupperger demonstrates a Dick Odle and his follow-through toss. Dick's back-saving follow-through which happens to release gives a higher initial launch attitude CD Ian Douglass hurries to time an unident yield great launch height. than John's, but at less velocity. ified contestant's Paraphrase.
A smiling Dick Odle has just maxed his flight group with the second longest flight of the day. An unusual model, the RO-19 is a really What ties everything together is the wing pylon. Text has the details. good floater with good ground covering ability. Note the use of index and middle finger pegs for fast throw.
Last year's winner, Don Nigg came with a better ship this year and Don's plane thermalling in lift. Cloudy day produced adequate lift finished in 11th place. Competition was tough. in most flight groups. glider to a record-shattering declared dis chose is the Eppler 387 which is a relatively of model, however the performance and the tance of 141 miles. The flight started at Lan thin, high camber section that many people strength of this model are way above caster, California, headed east past Barstow, feel is excellent for HLG (see September norm al. and ended in Chandliss, California. This 1985, page 27). On this last point, it was exciting to watch plane was first flown by Joe in the 1986 The wings are hot-wired from two-pound Joe in his very first throw of the contest. The TOSS Western Great Race (I believe) and is density blue foam, laid up with carbon task of round one is to record your best pictured in my Novem ber 1987 colum n fiber tow, fiberglass, and epoxy, and then flight in a ten-minute time slot given un (pages 38 and 39) as Joe's light-air, second vacuum-bagged between two sheets of my limited throws. Joe threw right at the start of ary racer at the 1987 W G R . Its fuselage is an lar film for a near perfect surface. The mot the slot and hit lift right away. Other planes epoxy-glass Vyger part from a Lewis Clark tled appearance of the wing is either from a followed Joe into the same thermal, includ partial kit now out of production. slurry of fine micro balloons and epoxy ing a BODST flown by Gordon Poulsen. I guess loe was still pretty "hot" on the which is squeegeed very thinly onto the These two managed to midair at about 30 sticks a week later because he flew three fiberglass skins to fill pin holes, or it's from feet. Both lost control momentarily and 1,000-point (normalized) rounds during the aerosol spray automotive primer paint (I recovered, but only Joe managed to pull out contest and then won a fly-off for first place. didn't ask; either way works). This is then at about ten feet, reenter the thermal, and His plane has no name, but I can tell you a sanded back down to the fiberglass so that slowly work his way back up to "speck-out" few things about it. It has a wingspan of 59 only the pin holes are filled. The vertical altitude. The whole episode was so dra inches, a root chord of 7 inches, a poly and horizontal stabs were also made this matic that as Joe caught the model to end break chord of 6 inches, and a tip chord of way. the flight (see photo), there was a spontane 4.5 inches. The trailing edge of the wing is The fuselage is actually from an old LJMP ous eruption of applause. He's so good he's very slightly swept at each dihedral point Flinger whose wings and tails were worn amazing. And on top of it all, he's not on a while the leading edge sweeps back notice out. The resultant plane weighs only 14.75 big ego trip about it (which I suppose is ably at each point. The airfoil section Joe ounces which is about average for this type even more amazing).
SEPTEMBER 1988 35 Every year a totally ready to fly RCHLG is raffled off. This year, A pair of Sunrise 60s, with the aileron version in the foreground. it was a BODST, plus a Futaba 4NL-33 Conquest radio.
Rod Knight and his no-name slope ship. It's a fast flyer with adequate George Spitzer from Pasadena suffered a pre-contest landing crash thermalling ability. and didn't compete. Of all the round one flight groups, Joe being the most you can record in a single for Lockheed, maybe he's got top secret lens had the longest flight of the day with 9:52 flight, and only five out of six throws count. filters! showing on the stopwatch. Next longest Time in the air is accumulative, so theoreti Dennis Brandt is another hotshot glider recordings were Dick Odle with 8:25, cally the most you could do would be ten pilot. He flies a modified Flinger and is al Dennis Brandt with 6:46, John Bently with minutes or 600 seconds. ways competitive with it. The Flinger he 5:15, Jerry Krainock w ith 2:26, John Lup- Working from the lowest scoring (worst flies has had its fuselage lengthened and its perger w ith 1:39, and G arth W arn er w ith lift?) flight group winners on up to the wings punched out to the Class A limit, but 1:33. highest we have: Allan Guthm iller with 179 otherwise it's stock. In its stock form, the The object of round two is to fly a five- seconds, Gary Ittner with 244 seconds, near-Eppler 205 winged Flinger has trouble m inute precision duration w ith in a ten- Dennis Brandt with 356 seconds, Dick at slow speeds and high angles of attack. minute slot. You are allowed unlimited Odle with 386 seconds, Don Nigg with 414 This is a model that demands that you keep throws to make this time. Four fliers man seconds, Craig Robinson with 468 seconds, your speed up when thermalling. To cure aged to make five minutes exactly, they and the numero uno pilot. One guess. this, Dennis laid two thicknesses of 1/16 were: Don Nigg, Garth Warner, Craig That's right, Joe Wurts had 534 seconds out wide automotive trim striping in a trip pat Robinson, and (you guessed it) Joe Wurts. of 600. This means he averaged in incredi tern on the outboard wing panels. Now the Let's see, now, out of a possible max of 15 ble 107 seconds per throw on his five tosses. model holds tight turns with the best of 'em. m inutes in these tw o rounds, he's got 14:52. Think about it. In a random ten-minute time The original Flinger is available in plan I wonder how many throws he needed in period, given six tosses, could you get five form from Model Builder Plans Service. round two? of them to average out to within 13 seconds The plan number is 9842, the cost is $9.50 Round three is the real strategy round. of a two-minute max? He found lift on every plus $1.90 shipping and handling (Califor Again, it is a ten-minute slot task, but the throw. I watched in disbelief! He has to be nians add an appropriate gratuity for the idea here is to get as much time in the air as able to see hot air rising. Has anyone else possible with two minutes (120 seconds) ever looked through his glasses? He works Continued on page 94
Jerry Krainock borrowed Dick Odle's RO-17 A hot RCHLG, 60-inch version of the Gentle Pete Olsen's Fantasia, a fine ship that needed and did well considering its weight and lack Lady from Goldberg, flown by Frank Green to loose two ounces and gain a better airfoil. of sufficient wing camber. and John Bentley.
36 MODEL BUILDER « r n x ο ο ο ο YA/r\WANNA BUILD A 'MODEL AIRPLANE?
Popping up tail to induce deep stall brings your model back to earth before it flies away in a thermal. We’ll show you how to add a fuse-operated dethermalizer to your model if you want to try it. can give you one that's just right for you with just enough pull. By BILL WARNER Illustrations by JIM KAMAN THE POP-UP TAIL "D.T." (Dethermalizer) A thermal, as you may recall, is a rising PART 11 bubble of warm air which can take your model for quite a ride, sometimes up and • Just as I gave you two choices of making ence in the flight!). I have tried .hat, but I out of sight. On a hot day, about every third your Moth with a long or short nose, I am sometimes forget to check it each time I fly. flight you make w ill be influenced by ther now going to give you the choice of making If you are like me, it w ill probably be better mals. Once you have your model well it with the tail glued to the fuselage, the tail to "key" the stab in place so it always goes trimmed out, the chances of losing it on a put on with rubber bands, or a pop-up back right where it was before. Some wonderful, high, thermal flight are very, "dethermalizer" tail. Like most other things modelers glue little bits of balsa stick to very good. Now this is okay for a Sleek in modeling, each has advantages and dis each side of the L.E. and T.E. where they Streek or Peck R.O.C. because you don't advantages. A tail assembly glued solidly to meet the fuselage. This "outside" keying is have much invested in them, but to lose the fuselage is easy to put on and gets your not glued to the fuselage, but fits up snug your F.A.C. Moth w ill hurt. It w ill be quite a model built in a hurry. However, when you against it. The reason it is glued to the L.E. thrill watching it go up, smaller and smaller go to fly and find out that it needs to be and T.E. is that they are pretty solid, but the into the great cumulus cloud realm of moved, there w ill be a lot of swearing and tissue in between is not. Never glue any Hung, theCreat Cod of the Thermal, but on cutting and regluing to do. Putting the tail thing that takes any stress to just the tissue your way home from the field, you may just on with rubber bands is a little harder to do, with no balsa behind it. These keys are wish you had it back to perform for you an but much easier to adjust. Making a tail added after covering. The rubber bands to other time. Enter the "D.T." The Flying Aces which does a trick, namely popping up at a hold the assembly on can be hooked M oth is a natural for a D.T., as it turns out 45- or 50-degree angle to bring the model around the tailskid and then over the stab to nose-heavy anyway. We're going to use a down out of a thermal, takes more effort to the rear motor peg, which will give the "pop-up" D.T., probably the most popular build, but may save your airplane to fly an added bonus of keeping the peg from mov way of getting models back. The principle other day. ing. The weight of your rubber bands involved has to do with the fact that when If you just want to glue the tail on as should be just heavy enough to hold the tail the wing gets to a certain "alpha," or angle shown in the plane, just skip the part about without adding a lot of weight. Tying a knot of attack, the air flow on top breaks away the other two tail setups. I am going to give and cutting off part of a long rubber band while the underside of the wing, exposed you the information on how to make the others now before we cover, as there is some structure to build in before the tissue goes on. THE KEYED STAB Holding the tail (stab and rudder) on with a couple of rubber bands has three advan tages: It can be taken off for storage, it makes repairs easier, and it is easy to shove in small thicknesses of balsa (called "shims'- or "packing") under the stab T.E. to change its angle. O n ce you make it remova ble, however, you have to do som ething to it to make sure it goes back on straight each time you put it on. You could draw lines on it down each side, I suppose, to make sure the rudder is not turned to one side or the other (it doesn't take much to make a dit'fer-
He.e's a ready made instrument panel for your The framed-up Moth with the tail kicked up to show how the DT works. This enables your model. Just cut it out and paste it to F-4. model to descend to earth safely, rather than have it fly off, never to be seen again.
SEPTEMBER 1988 37 "■■s*
Extra wood in center section of stab will let you make either a re movable "keyed" installation, or will let you make a D.T. more and more directly to the relative wind model back to fly again without a long coming from the front, gives more and chase. If the wind is blowing, you may want hooks and a length of "Q-Tip" dowel glued more drag. By popping the stabilizer at the to "short fuse" just to stay on the field and just forward of the stab L.E. The L.E. of the rear of the model up to about 45 degrees, out of the trees. stab butts up against a stop made from scrap we throw the model into a "deep stall" from THE ANATOMY OF A D.T. on top of the fuselage. Cut a wide "Vee" to which it cannot recover. It just stops flying There are several types of D.T.s, ranging mate with the shape of the center of the forward. There is no way to go but down. from weight-shifting schemes to parachutes stab's L.E. The undersides of the wing, the stab, and and air-brake "spoilers." They are set off by Make a "plug" or inside key that just fits the fuselage now "feel" the wind as if it timing devices from as complicated as inside the top rear o f the fuselage w here the were blowing up from the ground, and act clockwork timers to stuff as simple as Silly tail goes. Not too tight, not too loose, as you as if they were parachutes, slowing down Putty (a wire pulled through it at a certain don’t want it allowing the rudder to change the fall. W h e n the stab is adjusted at just the rate releases a line). I am going to show you position; but you do want it to come out right angle of "pop-up," the model will two fuse-operated designs. when the stab pops up. Make it double come straight down, making retrieval much D.T. NO. 1 (THE REAR-MOUNTED TYPE) thick in the front so that when the stab is easier. In contests where flights are only This is the simplest design. The center popped up there will still be some key in timed for a certain time, called a "max," the section of the stab is strengthened with the fuselage to keep it from moving from D.T. is timed to work right after the official some balsa sheet and two small hooks bent side to side. Add a hook, well bent over and flight time is ended. That way you have your from pins or thin music wire glued on the glued in, to the key as shown. Make another
38 MODEL BUILDER P.T WITH FRONT-MOUNTED SNUFFER (LEFT SlOE OF FU SELA 6 E)
The most sensible location for a D.T. is near the center of gravity, though it involves run ning the limiting line forward.
Parts for a front-mounted D.T.: fishline with stop ring, fuse, flared snuffer tube, bent guide tube, stop tube, .015" music wire hooks. : i· / / ' \ \ \ hook for the lower rear part of the rudder and glue well. U M p e R Sip e o f s t a ® s h o w in g k e y Flare a short length of 3/16-inch alu m i TO ALHSN TAIL A S S E M B L Y num tube. The flare helps get the fuse in, but it is not essential. You can "roll your own" from soft drink can aluminum if you strong polyester thread to stop the rear of the model. Now stretch a thin rubber band don't have the right size tube. You make a the stab when it gets up to 45 degrees. The from the hook at the rear of the rudder for flare by rotating a nail or similar in one end thread goes from the tailskid to the hook on ward, around the fuse, making sure that it of the tube to push the edge out a bit larger. the key, inside the fuselage, tucked neatly in touches it, and on to the hook near F-7. Glue the tube up between the two lower for the next use each time it's time to fly. When the fuse is lit (careful not to light the longerons of the fuselage and glue some When the top rubber bands that pull the model!), note how long it takes to burn a scrap on each side to make the installation stab up are connected, the stab should pop quarter of an inch. This w ill help when you stronger. This tube is very important, as it up every time, stopped by the limiting fly. Beware being fooled, though, as when puts out the fuse when it has done its job. It thread. If it doesn't, try more pull on your the plane is moving the fuse burns faster. won't help if you land in dry grass before the rubber bands (shorten by knotting) or take a Check it at some distance from a fan to fuse has burned down, though, so use good little off the sides of your key, now strongly simulate flight conditions. sense when you fly in dry areas! glued to the underside of the stab. Insert a THE FORWARD-MOUNTED D.T. Just in front of the tube, a piece of scrap short length of Peck D.T. fuse (or clothesline This is about the same as the regular D.T. across and another little hook will about with soft cotton stuffing such as Mike just mentioned, except that it carries the finish the job. Then all that is left is to make brand) into the tube. Surrounding the tube fuse near the CG of the model. The fuse a "lim iting string" out of a bit of fishline or area with aluminum foil will help protect does have some weight, which it loses as it.
SEPTEM BER 1988 39 burns. This can change the trim of your up. Study the diagram to see the positions know, you'd rather get your thousand model if you have a long fuse and if you use of the stop, snuffer, and front hook mounted words' worth that way! Still, I know that the rear-mounted type. Also, it gets the fuse on scrap sheet over the lower longeron un some of you w ill have it covered and flown in a little safer place in relation to dry grass der the wing position. The "burn-through" before we get to covering and flying, so let if you land early (kept away by the wing and rubber band is hooked around the ring, me wish you good luck. Just remember to landing gear). It's basically the same as the over the fuse, and onto the front hook. take all the warps out before ya' fly, and ex rear-mounted one as far as the keying of the W ell, gang, I think we'll put off the finish pect to put a lump of clay on the tail to get stab, top rubber bands, and L.E. stop are ing up until next month. I can get only so the model in balance. concerned. You will need to add a bent many photos and sketches in each time, If you haven't started your FAC Moth yet, piece of tubing to guide the limiting thread and we're about at our limit this month. I now's as good a time as any. We're going to around toward the snuffer tube's new for ward location, though. You could probably use plastic tubing for this if you have any, HOT SENPING though getting glue to stick usually requires a good roughing up with a file of 80-grit sandpaper. Heat w ill help in bending. I use 1/16-inch alum inum tubing bent around a 1/2-inch diam eter m arking pen, but a half HEAT IN FUAME ABOUT 15 inch bolt held in a vise would be easier if SECONDS you have only two hands. Aluminum tube has the nasty habit of folding or snapping when you try to bend it. The larger the bend, the easier it is. Also, holding pressure down where it is bending with your thumb SEND A FEW helps keep it from folding. I usually bend it DESREES a little, hold in the flame on the stove for 10 to 15 seconds to soften it, bend a little more, re-soften it, etc. The trouble with aluminum is that it "work-hardens" in bending, which gives you your problems. The limiting thread goes around the bend inside easily when it is "hardened" with a little glue rubbed into the thread. The end of the limiting thread has a little ring or crosspiece tied to it after installation through the "stopping" tube o f 1/16-inch tube. The position of the stop tube is deter mined by how far the stab is going to pop RE-HEAT TO SOFTEN AGAIN
BEND A LITTLE MORE, r e p e a t (3), etc.
F u A * e £N£? O F SNUFFER TU&E WITH NAU. (USB NOTARY MOTfOM)
Aluminum will kink when bent cold on small-radius bend. Either Flaring the D.T. snuffer tube with a thick nail or end of a drill as keep thumb pressure or use "h o t" bending technique. shown will make fuse insertion easier.
40 MODEL BUILDER
which is based on the system used by St. Claire and Walker, the T-shaped bellcrank (as an aside, it was interesting to me to learn that St. Claire's original airplane actually used four lines, with the third and fourth lines operating an aileron system designed By JOHN THOMPSON to keep the plane tight on the lines; a system St. Claire abandoned after early flights showed that it was unnecessary). • Writers of columns like this one tend to The basic principle of the T-bellcrank is assume that their readers have som e m odel that the pilot's use of his arm movements to ing experience, and often we just launch adjust the tension on the two lines operates into the middle of topics without laying the the arm of the bellcrank that moves the groundwork. pushrod that in turn moves the elevator Occasionally, however, it's probably wise (and, on some airplanes, wing flaps and/or to acknowledge that, as we go along, we rudder). pick up new readers (new modelers, people Other control systems, also still used and thinking of getting into the hobby, or per popular, are the one-line torque system and haps modelers in other types of flying) who the three-line system. The one-line system may not have the background in many of activates a torque unit in the airplane by the topics we mention only in passing. twisting the line, and the three-line system It may be a bit confusing to read a discus uses a special bellcrank to operate a throttle sion on FAI combat or Formula 40 Speed or or other function on the aircraft. Each kind the latest interpretation of the entry point of of control system uses a different kind of the horizontal square eight if you don't handle. The two-line system uses a handle know w hat FAI is, or w hat Form ula 40 with two-line connection points (some Logo for the Seattle, Washington Skyraiders. stands for, or that there was more than one times adjustable in separation so that con kind of figure-eight. (due to its proximity to the ground) and the trol sensitivity can be adjusted). The three- This column, then, is intended to go one that can be done in the most confined line system adds a third line between the backwards in time a bit for the benefit of space. Because it uses only wires and me elevator-control lines; the third line is oper those beginning, thinking about beginning, chanical parts for control, it is less expen ated by a trigger and/or lever. The one-line or simply curious about control-line model sive than the types which use radio control. system uses a handle attached to a threaded aviation. Control-line model aviation began in the rod and a knob that moves back and forth, STRINGS ATTACHED late 1930s. Correspondence and reading spinning the rod as it moves. First of all, let's begin with a brief discus I've done over the years indicates that it ac The two-line system is used for many sion of the definition of control-line model tually was invented approximately simul sport flying planes, for combat, racing, and aviation. Yes, I know it sounds elementary, taneously by several people. The earliest I precision aerobatics. The one-line system is but remember that in this diversified soci am aware of is the late Oba St. Claire of Eu common in speed competition. The three- ety of ours there are people w h o have never gene, Oregon, who upon his death in 1986 line system is used for Navy Carrier and seen CL model aviation. I am reminded of still owned the never-crashed "Miss scale modeling and many sport planes. Ad this every time I am at a Nats or a major lo Shirley" which is believed by many to be ditional lines have been added by some cal contest at which R/C fliers happen to the very first CL model airplane. Other scale competitors for additional functions. drop by. Even these active modelers often names that have been mentioned, and I Scale modelers also have begun using profess amazement at the discovery of the cannot give the exact dates of their early electricity-conducting lines to operate on excitement of CL competition (and a few flights, are Ron Moulton of England and board electrical systems for scale functions. become converts to what they learn are Robert Smurthwaite of Grants Pass, Ore A digression: Just above, i used the term "cheap thrills" in comparison to what gon. Also among the pioneers, and the one "sport" modeling. If you're new to the they've come to know). whose promotion of CL flying through his hobby, you may be confused by the com Control-line is the only type of model avi business enterprises is acknowledged to mon usage of that term among modelers. ation that gives the pilot direct control of his have been most responsible for worldwide Try to follow this: If you are a casual flier, craft. He is close enough to see its maneu spread of the hobby, was Jim Walker of Port just doing it for fun on Sunday afternoons, vers, can feel the plane's responses immedi land, Oregon. From Jim Walker's trademark you are a "sport" flier. If you attend contests ately through the lines, and is a "pilot" in comes the nickname "U-control" often ap and participate in the sport of model avia the truest sense possible without actually plied by old-time modelers. tion, you are a "competition" modeler. I going up in the air. It also is the fastest of the There are several kinds of control-line sys don't know how this apparent contradiction modeling events in its competitive form tems in existence, the most popular of in terms evolved. Furthermore, I have never
Combat is a team sport. Norm McFadden and John Salvin work on Racing planes need regular maintenance in order to perform well, plane for Gary Byerley. Photo: Charlie Johnson. Paul Gibeault works on rat racer in Richmond, B.C. Photo: IHazel.
42 MODEL BUILDER known w hy som e fliers say, "I don't fly com petition; I just fly for fun." Well, I fly sport and competition and find them both to be fun. But this topic could cause us to digress for pages. Notwithstanding the dacron lines that come with some ready-to-fly plastic toys and are available for small planes in the hobby shops, 99 percent of C l models are flown on steel wires. The most common type is the seven-strand stainless steel cable available in sizes from .008 of an inch up to .021 of an inch. Also common in racing and speed is single-strand music wire in a simi lar size range. The braided cable is more versatile and withstands abuse better; the single-strand w ire is stronger for its size and cleaner (less draggy) in the air. One of the major manufacturers in recent years attempted to market a new kind of lines, which were eagerly awaited but turned out, in their first form at least, to be unsuccessful. These were the Kevlar lines, made of a super-strength synthetic material. They were indeed strong enough, but they produced such excessive drag that they seri ously degraded the performance and trim Racing action keeps pilots busy. Four-up Northwest sport race, in Portland, Oregon. From left: John Hall, Rich Salter, Jim Cameron, Glenn Salter. Photo: Hazel. of aircraft. They also had no legal use in competition, a situation that might have of those around here. How about a nice R/C sents U.S. fliers in the international Federa changed had the lines been practical. plane?" Second, look for the club nearest tion Aeronautique Internationale (FAD, and T A K IN G O F F you. Again, try the hobby shop. They will generally serves as the modelers' all How does a person get started in CL most certainly know if any clubs are in the purpose service organization. Dues to m odeling? area, and may have information on their AM A are the best investment you can make Obviously, it all starts with the first air meeting times and flying sites. as a modeler and should be one of your first plane, engine, lines, handle, battery, etc. If the hobby shop can't help, write to the expenditures; the insurance alone makes it In "the old days," meaning any time from AMA. There's a term you w ill hear much of worth while. the 1950s through the 1970s, one could as a modeler, the AMA. The Academy of Write to AMA at 1810 Samuel Morse simply walk into a local hobby shop and Model Aeronautics is the national minia Drive, Reston, Virginia 22090. Dues are ask the person behind the counter. A little ture aviation organization, a division of the $40 for open (age 19 and up) full member while later, you'd walk out with all you National Aeronautic Association. AMA is ship, $36 for open limited membership needed to get started. the organization that sanctions model avia (newsletter only, no magazine), $20 for an Unfortunately, it's a little more compli tion competition, insures fliers, publishes a additional family member, $21 for senior cated than that nowadays, but still possible. magazine and various newsletters, acts as a citizens (65 and up), $16 for juniors (ages up The hobby shops of today are oriented to clearinghouse for all kinds of modeling in to 14) full membership, $7 for juniors no the high-profit radio-control market and formation, operates a computer network, publication membership, $18.50 for seniors most are operated by people who are busi runs a model aviation museum and the Na (ages 15 to 18) full membership and $9.50 ness people and not hobbyists. So, if you tional Model Airplane Championships, for seniors no-publication membership. don't know exactly w hat you're looking for, makes and rents modeling films, charters You can join at any AMA-sanctioned you're likely to come away with something local clubs, helps with obtaining and keep contest. you didn't really want. If you do know what ing flying sites, negotiates with the federal to look for, you may or may not find it in government over R/C frequencies, repre- Continued on page 101 your hobby shop, but I always advise new modelers to try their local shops first. After a while, you and your fellow modelers may build up an interest in the shop owner in carrying what you need. In the meantime, how do you get what you need to get started? The first thing you have to track down is another CL flier. It may seem like there are none around you, but there are. CL modelers are spread out in little pockets and by themselves in corners of every com munity. Many fly in schoolyards, depend ing on where the crowds and noise w ill al low. In communities with clubs and CL fields, they probably fly in some remote lo cation away from, again, the crowds and sensitive neighbors. First, ask in your hobby shop. Do they know of any C L fliers? If it's a good shop and the owner is paying attention to his cus tomers, he knows whether there are CL modelers around or not. If he's honest and Concentration is important in combat. Mel reputable, he'll tell you how to get in touch Lyne, left, and Frank Boden go at it in Jet speed planes take on unusual forms. This with them. Beware if he says, "Nope, none Richmond, B.C. Photo:Hazel. is George Fogarty, from Texas. Photo: Hempel.
SEPTEMBER 1988 43 The Painted Desert
STO RY AND PHOTOS BY D A VE "V T O " LIN STRUM . . .The annual USFF Championships in Taft came off well as usual, with a stalwart gang of free flighters launching at the crack of dawn.
• For over two decades, free flight fanatics USFFC, this is the best flying site they w ill some word pictures of the desert action. from all over the nation (and some from see all year. N o w onder it is a m ecca for F/F! Perhaps flying into San Francisco on a big Canada, Mexico, and foreign shores) have Since we can't show you color photos of silver bird (America's "On-Time Machine" been attracted to the California desert like this many-hued scene, we w ill try to paint DC-10) was an omen, for our first impres iron filings to a magnet. This mystical sion of Taft was in deep b lack and silver. W e migration is now free flight folklore. The drove down with Oakland Cloud Duster U.S. Free Flight Champs is the pinnacle of Jim Harris by the light of a silvery moon, ar competition, outshining even the formerly riving at the field at 3:00 a.m. W e awoke to prestigious AMA Nationals in quality and bright white sunlight as sol ascended over keen contestant skill. the parched brown hilltops. All around us Why do these seasoned competitors fly was a curious gypsy village of campers, RVs, in the desert? To be free, of course; free from station wagons, and vans. Strung out in buildings, pine forests (and other trees), front were bright nylon sunshades, protect hills and deep gullies, highways, etc., free ing models and fliers from that searing sun. from all the model traps. If your free flight It became a yellow balI in the sky, which cu ship drifts with the wind in the embrace of riously enough was "Carolina Blue." Soon a sustaining therm al, you want to be ab le to fluffy white cumulus cloudbanks formed, chase it without barriers, natural or man proving that thermal activity was abundant. made. Another desert benefit is that ther At day's end, the orange and purple sunset mal activity is predictably high, though you was blurred by wind-torn cirrus and have to take the downdrafts with the lift. ominous grey storm clouds. After nightfall, Thermal detection at the USFFC is a modelers brought out those strange yellow- science and a fine art. green chemical litesticks. They attached This particular desert is in the lower these to everything from "D " Gas monsters reaches of the San Joaquin Valley, about to little P30 rubber jobs and proceeded to two hours by car from Los Angeles and five night fly. hours south of Silicon Valley. Gardner At dawn, the sane flying returned. Cov Field, the flying site, is a level area a mile ered in many hues of tissue, silk, and mylar outside the small oil town of Taft, just east of films, the models stood out against the pure the "Kitty Litter" factory. The foothills are blue sky. W e noticed that several fliers were full of oil derricks, and the valley floor be using broad black and white strips on un yond the field is verdant with new crops. dersurfaces. Many hand-launch glider fliers When the California Aqueduct arrived, used black on the underside to give better farmers were able to irrigate and turn the visibility for timing. This works well against desert into a breadbasket for Los Angeles John Oldenkamp, San Diego fashion model, sky or hillside. For a max, contrast is impor and points south. So far, this has not inter thinks this Starline T-shirt says it all about tant in the clear desert air (no smog here, fered with flying. For many entrants in the rubber power. Los Angeles fliers agree). Finally, we have
44 MODEL BUILDER Carl Hatrak, with SCI F, was a Trenton flier when this Miss Fortune Phoenix's Randy Archer cleaned up in FA I Power with seven max was designed by Nick DeAngelis. flights. All aluminum-clad surfaces, graphite boom. Nelson .15. the warm brass and brown wood tones of the trophies, delivered truckload-style by Contest Director Carlo Godel. Statistically, the USFFC falls between gar gantuan and behemoth with an incredible 244 contestants sampling a smorgasbord of 52 F/F events. There were opportunities for all in 25 AMA events; 12 Old Timer, 4 In door, and 11 Special Events (privately spon sored). CD Godel and his understudy Bill Booth Jr. w ere kept busy, but the contest was really run by member clubs of the Free Flight Model Association of Southern California. Without these clubs, there would be no timing tables or timers. This meet was run by fliers for fliers, a very satis fying management philosophy. Other statistics also come to mind, in the form of stupendous scores in the thermal- packed desert atmosphere. Bob Sundberg of Los Angeles claimed top time in 1/2A Gas with a mind-boggling 50-minute total! Not to be outdone, Ray Faulkner (also of Los A n geles) led the pack in D Gas with 59:45; that's 11 maxes and a 5:45! The team champions, calling themselves "The Combat Kids," were no slouches: Terry Kerger hit 44:38 in B Gas; Randy Archer, of Phoenix, aced a cool 30:00 in FAI Power; and Martyn Cowley, a refugee from the UK, Fresno's Dallas Porter with humongous D Gas Satellite 1300 with O.S. .60 glow engine. Not a totalled 21 minutes in Nordic A/2 (F1A) kit, it took a carload of balsa, Hot Stuff, and MonoKote. towline glider. Matt Gewain put Martyn in to 34:36 in 1/2A Texaco while Larry Clark, way, who got a 2207 score with her "Moon- second place, mind you, by six seconds. of San Diego, thermalled for 25:42 in OT shot" designed by husband Don. All these The Old Timers had their statistical highs Texaco. Even tiny craft flew long, as shown fliers worship the Thermal God "Hung." as well: Dick Lyons, of Los Angeles, soared by Pee Wee 30 winner Carol Bartick, of Po W hile astronomical scores like those may
SC IF old timer Bob Erickson flies classy Miss World's Fair 50, a 1939 San Diego Orbiteer Bob Langdon with pretty Jim m y Allen Blue Bird design from Fresno Models kit for OT Cabin Rubber event. flown in special event for Allen designs.
SEPTEM BER 1988 45 Bob Beecroft from San Diego says the devil Detroit's Paul Crowley gives thumbs down on made him do it; still flys 26-year-old Class air sensed by his recording thermal sniffer. It's San Jose's Jim Harris looks for lift to launch D Satan. essential in Wakefield. his R/N kit Slats. Note Foreign Legion hat.
SCAT flier Juan Livotto of LA ready to jog out with circle-tow glider C.T. Jordan, Tustin, California old timer, loves his mammoth Lanzo number 25. Wind was rough on towing. Bomber with Super Cyke .60 ignition with 13.6 Rev-Up prop.
Martyn Cowley of LA via U K D.T.'s the wing on his OHLG Gold Sacramento FAI power maven Roger Simpson tunes A BC Rossi in Rush, a regular winner in glider competition. aluminum-clad RS-80. Sleek ship placed 2nd in flyoff with Archer. be indicative of good field tactics and ther Beecroft, back in action after a long hiatus, gumband in the fragile model. Vic Cunnyn- mal sensing, there is no way to predict how named his D Gas "Satan" when he built it gham Jr., of Covina, had his venerable "Sir- models will be named. Sure, there were 26 years ago! Another San Diegan, Alfie roco" in D Gas, while Doug Galbreath, of "Stardusters," 'Satellites/' and their com Faulkner, had a huge (not tiny) "Pixie" from Davis, flew "Summerwind" in FAI. Ed Car mon brethren in the air, but have you ever the 1938 Z a ic Yearbook. In a m odern vein, rol, of Riverside, was behind him with a seen a "Low Box"? That's the name John Ol- Mike Mulligan, of Los Angeles, flew his "Saje" FAI, while Roger Simpson chickened denkamp, intrepid desert photographer "Sheer Terror" (Loren Williams design) in out, namewise, with his "RS-80" FAI. Bor and San Diego Orbiteer, hung on his new M ulvihill. The name derives from the pre ing! Randy Archer was more creative with all-balsa P-30 Rubber. His clubmate Bob launch feeling you get with a fully wound his "Silver Bird" winner.
46 MODEL BUILDER Alfie Faulkner of San Diego sees a thermal Rich Rohrke of SCAT club in LA has it made meant for his O.T. Gas '38 Pixie. A Schu Blacksheep Squadron's Ray Juncal of LA with in the shade with all-white flying duds and his macher design from Zaic Yearbook with Peck kit Pietenpol and Mace kit Caudron. Mozart Wakefield. DC 350 diesel .21 from England.
Chuck Rushing of San Francisco displays his elegant Wakefield CR.2 Mulvihill man Joe Foster of Oakland Cloud Dusters smiles because that uses a Starline front end. timer Hank Cole has a max on the watch!
Don McHugh, San Diego lets loose of his hot Kathy Ganzer of Mojave, California with neat San Diego Orbiteer and P-30 originator John No Name P-30 rubber, an event that was little peanut Piper Cub from Peck kit. Oldenkamp lofts his yellow Lo Box all-sheet created by his club. quickie P-30. In the AM A Gas classes, "Texan" designer Martyn Cowley was seen flinging his "Gol- Steve smiled and replied "Dave, I named Ed Miller, of El Paso, came up with the swift drush" HLG into the heavens. It went OOS! it after you." Now this really got me curious. climbing C Gas "Cultured Pearl." Andy The most creative, tongue-in-cheek W hat had I done to have a model named af Faykun of SCAT/LA built a 1941 Danish model name, however, came from Steve ter me? Did he mean "VTO " or was the H LG Wakefield, "Victory." Those Danes are still Geraghty of the Oakland Cloud Dusters. I another "Dave" or even worse, "Whatshis- about, as his clubmate Norm Furitani had a admired his HLG, built-up wing and all, "Tilka" Wake built from Dolby kit. Finally, and asked the name for a photo. Continued on page 98
SEPTEM BER 1988 47 INDOOR FLYING REPORT By DAVE "VTO” LINSTRUM
HINT OF THE MONTH showing the compact but efficient building DC Maxecuter Don Srull launches his Alco Our HOTM for September is for indoor area used by Joe Bickinella in Alhambra, Sport Coconut Scale to win event. scale fliers w h o don't w ant to go all out w ith California. Joe's homemade desk/draft- at present time are: 1911 Hirondelle an airbrushed, color finish. There are sev ing/building board has a hinged top with (France), 1913 Deperdussin HS (France), eral good colors of tissue available from magazine shelves and storage under. At the 1911 Avro Type K (UK), 1917 SIA 7b-1 (Italy), Peck-Polymers, Indoor Model Supply, and back are scale pilot figures, model and 1912 Chiribiri #5 (Italy), 1917 SVA 1-10 Micro-X Supply. However, for certain drawing tools, and a clamp-on drafting (Italy), 1907 Bleriot VII (France), 1911 models you need an unusual tissue color. lamp. Good lighting is essential to precise Nieuport Racer (France), 1916 DH-6 (UK), We faced this problem when building a building. Send us a photo of your work 1913 HP Yellow Peril (UK), 1912 Nieuport Mooney Peanut Avro "Spider" from MB shop, with a brief description, for a future Schneider (France), and 1911 Latham centerfold plans. colum n. Monobloc (France). TOTALLY OBSCURE! The answer was Spectra Art Tissue, availa OBSCURE AIRCRAFT All planscome vis first-class in USA, post ble at art supply stores. We found the per Another contribution from Los Angeles, paid. Roger also has neat scale fittings. Or fect W W I British brown hue among the that hotbed of scale flying, is the plans list of der today! Roger Teagarden, 1234 N. Edg- many available. The tissue is without grain all Obscure Aircraft drawn by Roger W. emont, #204, Los Angeles, California and is a w ee bit on the heavy side but is still Teagarden of the Flying "T" Model Com 90029. lighter than doped tissue. Next time you are pany. We know the name sounds like a W HAT IF THE RULES WERE DIFFERENT? in an art supply store, ask to see their Spec ranch or brand of beef, but it is really just a (This NFFS item by Hewitt Phillips is con tra selection. clever expression of the attitude that went tinued from the August issue.) INSIDERS WORKSHOPS into selecting and drawing these plans. For A second comparison is made of the vari Bill Warner of the Flightmasters (Los An only $5, you get a fully detailed 18 x 24 ous types of models winning in the open geles) sent in this month's workshop photo, blueline print of a fabulous flyer. Available class in the "Mini-Dome" at the 1987 U.S.
Author Linstrum found his thrill with his new models. From left: Joe Bickinella's home workshop in Alhambra. California, is source Phantom FI ash (stretched), Bristol Scout, P63 FAC NoCal. of precision guesswork.
John Wilson of New Brunswick prepares his Boxy Canard in a high school gym. It's cold outside! Here John launches his Boxy Canard.
48 MODEL BUILDER *he atriu m in s e c t
__ ——-
JIM RICHMOND'S INDOOR RECORD CLASS A ROG Indoor Championships (See Figure 1). These results appear a little more consis 17=34 6 -2 4-78 tent, possibly because the models were W EST BADEN more consistent or possibly because the INDIANA THNIRT models were flown in the same 116-foot ceiling under comparable conditions. Again, however, the endurance increases somewhat more rapidly than 1/WM/S. A similar analysis using data for excellent flights made by models in various classes was given by |im Richmond in his model-of- the-year article in the 1980 N FF S Sym p o sium . Richmond's data were plotted as a W EIGHT .0 0 9 0 OZ. function of the total weight divided by wing .225 GM. area, WT/S, using wing-along area and cor- MOTOR .042 X .024 NEW ‘78 PIRELLI
rected to the same ceiling height. These data have been replotted as a function of 1/ W ith a ll that's happened at the Tennes see Indoor Champs, Taft Free Flight WT/S in Figure 1. Again, the results show Champs, and other free flight activities that the endurance is increasing even more nationwide, who said free flight is rapidly than predicted by the formula as the DEAD? wing loading is reduced. Sal Fruciano reminds us your best sup Results of the Overriding Effect of Wing port of free flight activities, now and in Loading. the future, is a STRONG NATIONAL The least restricted category, the AMA FREE FLIGHT SOCIETY. Stick, has in past history been the focus of Fifteen dollars to Sal Fruciano, at 6146 indoor model design improvement. The East Cactus Wren Road, Scottsdale, Ari challenge of building models of this type zona 85253, puts you on board as a has always been to seek methods of reduc member. This includes subscription to ing the wing loading. In discussing his Free Flight Digest publication. DO IT NOW! New Brunswick flier Dave Boyer with neat DeHavilland Leopard Moth. Con tinued on page 80
Portland's Jim Longstreth designed and built this sleek allred Bostonian Number 88.
SEPTEMBER 1988 49 Matsuru Watanabi, of Japan, made this char ming paper model Nieuport monoplane from the Hannan's Hangar column logo. Model folds flat for mailing. "I carried this failure with me for 55 years, until Frank Zaic published his M o d e l A ir planes and the American Boy in 1982. THEN I rose to the challenge and built the original Baby R.O.G. exactly according to plans. It was not easy to build. The landing gear alone required difficult bends, and the bamboo, wow! Bending bamboo for the rudder and wing tips was quite an experi ence. I had several small conflagrations be fore I succeeded. "The original Baby R.O.G. is difficult to fly well because of the small tail moment arm; the horizontal stabilizeralmost touches the wing when the plane is balanced for fly ing." Dick now uses the model for flying demonstrations at shopping mall shows and in model building classes. E. J. Sigmond, of Everett, Washington, • Our lead-in line, doubtless true of also feels that a tribute to M errill Hamburg models as well as full-size aircraft, is by re is long overdue and says: tired North American Rockwell engineer "M y modeling fire (and 43-year career as and former American Aviation Historical a model retailer) was lighted while, as a Society president, Dusty Carter. young 'tyke,' watching my slightly older ERRATA AND UPDATES brother building a Baby R.O.G. from A m eri Our May 1988 Hangar column featured can Bo y magazine." Robert Lockwood's tribute to Merrill Ham AND FINALLY burg and the AMLA, which attracted sev Stefan Gasparin, builder of those tiny eral letters. Bill Kee, of Twin Falls, Idaho, CO., engines and Wee R/C units in pointed out that AMLA was incorrectly Czechoslovakia is an e le ctrica l engineer, represented, and should be Airplane not a mechanical engineer as we had Model League of America. supposed. Dick Stuart of Walla Walla, Washington, ALSO IN CZECHOSLOVAKIA agreed, and added that as a boy he had or New Peanut and Pistachio scale model dered a Baby R.O.G. kit from AMLA, as ad rules have been produced and tested, ac vertised in The American Boy magazine. cording to Lubomir Koutny and Tonda Al- For 65 cents he received a small bundle of fery. Quite elaborate, the rules were in sticks, a propeller block, some tissue, rub tended to better equalize the competition chances of widely differing scale subjects ber, fiber wheels, wire, prop shaft bearings, banana oil, and Ambroid glue. Unfortu by offering bonus points to those perceived nately, as he put it: as difficult to fabricate and/or fly. For in Walt Mooney's P-30 Squared is so-named be stance, helicopters, autogyros, and flying "M y first attempt to follow directions and cause it is a semi-scale model of a Consoli wings would receive bonus points, as the small plan was a complete failure, like, dated P-30 modified to conform to the P-30 I guess, thousands of others. competition rules. would flying boats, float-planes, and de signs with functioning contra-rotating propellers. Minus points are also included to deal with grossly out-of-scale models. Addi tional flight points were awarded for R.O.G. starts as opposed to hand launches. Initial tests established that the intent of the new rules was achieved; however, the work load of Dr. W ill Nakashima, well- known for his whimsical model-building cartoons, wrote to say that with the advent of his 30th high school reunion, he realized that modeling was still just as important to him now as it had been during school days. He also expressed some personal philosophy about the types of models we build: ",. .We really do tend to build models of a certain size. Mine seem to be Coupe d'Hiver, A1 glider, and 1/2 A Gas. I've built bigger and smaller, but I keep coming back to the above dimensions. I think you ought to make models bigger. Perhaps a 16-inch span limit. Fly them at schoolyards about an hour after sunrise when the air is calm and 'level.' This appeals to all of my likes Don Srull with his remarkable free flight Dornier DO-X, featuring 12 electric-motor driven which are outside at that time of the day propellers. A good flyer. Photo: Tom Schmitt. and to have models which are less demand-
50 MODEL BUILDER Christophe Hanriot, France, with his Pistachio Scale ULM Barouder, during a contest at Fla- malle, Belgium. Photo: Van Hauwaert.
A selection of Japanese pre-war ready-to-fly models includes gliders and rubber-powered silk- and-wire models. More information in column this month. morning, which I've only appreciated in the "the rest was a flopper.'" He added: "Walt past few years." should name his gyro 'Gillette' (as in 'how JAKE'S CIROS are you fixed for blades?')" Jake Larson, of Pinellas Park, Florida, sent SPEAKING OF GYROS in a poem about model autogyros, from George Perryman sent the photo of his which we have extracted the following: latest, named the "Little Biddy Speckled Ivan Simonik with his pioneer Guillebaud 'There once was a Mooney named Walt, W hirly Bird," which now holds three AMA tandem Pistachio, designed by Lubomir "whose autogyroing came to a halt. records. The most unusual aspect of Ge Koutny of Czechoslovakia. "W hen the rotor threw a blade, orge's model is the square-shaped rotor, ing and more relaxing to build. Call it "from where it should have stayed. w h ich is m ounted under the fuselage. The 'Schoolyard Sixteen' event. It falls into the "H is timer, most proper, rotor incorporates ten degrees of twist and gap between Peanuts and Jumbo scale. You "said, 'Walt, you've come a cropper— can teach people the pleasures of the early " 'cause the blade in the air stayed, Con tinned on page 85
At Backstrom's Coconut scale Lippisch Storch is rubber powered, George Perryman launches his AM A autogyro. Device beneath the spans 36 inches and has exceeded 30 seconds indoors. model is square rotor assembly. Details in column.
SEPTEMBER 1988 51 CONSOLIDATED XAV-l An experimental Navy Bomber
By M ARK FINEM AN. . .This Vega lookalike is the military version of the Consolidated Fleetster. You can build it from full-size plans, available through our plan service, or turn the page and build a peanut version.
• In answer to everybody's first question: Vega look-alike) and a parasol wing version handsome, monoplane Navy bomber in an no, this is not a navalized version of the with the pilot situated aft of the wing. The era when the Navy was hopelessly smitten Lockheed Vega! The resemblance between Fleetsters, incidentally, used an all-metal with biplanes. Besides being an all-metal the Lockheed and Consolidated products is monocoque fuselage, unlike the all-wood monoplane, the XBY-1 had an internal striking to be sure. And the Consolidated Vegas. Only about two dozen Fleetsters of bomb bay, a flush-fitting dorsal gunner's Fleetster (the progenitor of the XBY-1) was a all types were ever built. hatch, and beautifully panted fixed landing contemporary of the much more successful The depression economy provided little gear. The XBY-1 was intended for carrier Lockheed ship. The Fleetster, like the Vega, market for the Fleetster, a fact that was not work, being equipped as it was with a tail was intended to be s single-engine com helped by Reuben Fleet's own indifference wheel and retractable arresting hook. With mercial aircraft, but, for reasons about to the big transport, even though it was a fixed span of 45 feet, the big ship might which one can only speculate, the Fleetster named in his honor! In an effort to breathe have been quite a job to handle within the never equalled its Burbank contemporary. new life into the project. Consolidated en confines of a hangar deck, but the XBY-1 The Fleetster was actually produced in gineers reconfigured the Fleetster into a was scratched by the Navy before she ever two versions, a high-wing cabin job (the military aircraft, resulting in the XBY-1, a saw the deck of an aircraft carrier. This in-
Cockpit detail on the XBY-1. Acetate and paper cockpit frame are Bottom details: ribbed flotation gear is glued to a 1/20 balsa plate built over a simple basswood framework. in the wing of the craft.
52 MODEL BUILDER
Author with Nostalgia Ignition Powerhouse 41. Designed by Dick Korda, engine is O&R .23.
SEPTEMBER MYSTERY MODEL effect which required .8 pounds for each This is one of those puzzlers. As you look square foot of wing area. The reasoning be at the ship from its side view, you will no hind the airfoiled fuselage is that is will tice that the fuselage is shaped like an air serve to give added lifting surface without foil. According to the article that accompa added weight penalty. In recent correspon nied the design, the airfoiled fuselage was dence with the designer, he noted that this there to take advantage oop of the balsa gimmick was more fiction than fact, but it sheet. made a nice addition to the article when he If nothing else, let the sketch give you the wrote it. The ship is a genuine Nostalgia Ig inspiration to do some doodling on your nition Legal design, and the original shows own. If you haven't been turned off by the a Delong .30 in the nose. So, you think you addition of R/C to F1C, then you should know what it is, do you? W ell, write it down consider a design like Zhijian's. and send to Bill Northrop c/o M o d e l SEPTEMBER MYSTERY MODEL B u ild e r magazine. First in line with the cor This is one of those puzzlers. As you look rect answer wins a free, one-year subscrip at the ship from its side view, you will no tion to Model Builder. tice that the fuselage is shaped like an air SEPTEMBER DARNED GOOD AIRFOIL— foil. According to the article that accompa Sune Stark nied the design, the airfoiled fuselage was Back in 1951, the World FAI Champion there to take advantage of the rules then in ships W akefield C up was won by the Sw ede Ken Grubbs in his workshop inspecting an other of his rubber-powered models.
John Lenderman with his N FFS Top 10 win ner, Le Nomade. Three-view of this model Mark Sexton with his version of Phil Hainer Sr.'s Chik'N Coupe, an ultra-simple Coupe d' Hiver was in Model Builder earlier this year. design. Three-view and kit to follow soon.
SEPTEMBER 1988 57 SC A LE M 1:10 F1C D ESIG N ER : Cheng Zhi Jian TEAM AEROMODEL TEAM OF THE PEOPLES' REPUBLIC OF CHINA
MODEL BUILDER CJl 0 3 Fig. 1: Equiangular spiral curves plotted on plywood sheet. This sketch shows example of how to utilize 1/32“ plywood sheets for two patterns. The top pattern shows 3% and 10% curve. Bottom pattern shows 4% and 9% curve. Note small notch at leading edge, about 2% below the end of the camber line. Notch is important and should be on each pattern.
Fig. 2: Using the E.S. pattern. Sketch shows how to use plywood pattern to transfer the curve to sheet of balsa. Note position of the pin at the leading edge notch to place pattern in proper location. Rear pin is used to set appropriate chord length for your model.
Fig. 3: Symmetrical airfoils using E.S. Pattern. If you wish to design symmetrical airfoil, use same plywood pattern (say 9%) for both top and bottom camber. In this case, datum line is in center of airfoil section as shown in sketch. Sketch also shows rectangular leading edge that is faired into airfoil when drawn to final shape.
Fig. 4: Undercambered sections using E.S. Pattern. To produce undercambered section, mark the datum line and place pins at desired leading and trailing edge points. Take upper surface template (say 6%) place notch around pin and bring template to touch trailing edge pin. Next, bias leading edge pin by moving it down about 1/16" then repeat above procedure using thinner template(2%). Fair in leading edge with suitable curve.
AIRFOIL OF THE MONTH
ST A. 0 1.25 2.5 5.0 10 20 30 40 50 60 70 80 90 100
UPR. 0 2.00 3.14 4.81 6.86 8.55 8.85 8.44 7.54 6.31 4.87 3.31 1.70 .2
LWR. 0 .48 -.54 -.51 -.26 +.55 1.13 1.32 1.22 .95 .59 .19 -.1 -.2
SEPTEMBER 1988 59 sults were amazing: no string, violent stalls; • 1% Meter with string, flat glide." So, for your edifica Rye glider tion this month, here is the Sune Stark •59 "Wing airfoil—with turbulator. Obviously, the air •Featured in foil without the turbulator worked well for Stark, but it needed the turbulator to work Jan. 88 RJC for Barker. Worth the experiment? W hy not? •Flies great NFFS NOSTALGIA IGNITION LISTING ‘ Turns tight by Bob Larsh •Strong foam wing;hardwood spars,lite balsa skins*Hand launch,moderate hi-start or «inch Several months ago, I reported on the ‘ Most 2 ch. sm. equip, fit, forward bay-.6"-1.2"ft.,l"-2.1"rear,7"-long;RX bay-i'1.5"-2.7" new event that is being run at this year's SAM Champs: Nostalgia Ignition. By the *Your choice-coupled nidder/aileron, elevator or rudder, elevator w/polyhedral wing time you read this, the event w ill have been •Complete hardware furnished for both versions. Only additional materials needed are completed and the results known. Accord adhesives (epoxy & CA) and 1 roll covering. CULPEPPIR ing to Bob Larsh, one of the gurus of the Krt-$41.00 S&H-S3.00 ■ _ * __ _ Nostalgia movement, the number of in Basic design-Russell A. Shaw ^ w J b ^ ^ F M O D E L S I M C quiries received about the event shows that Redesign,plans-Leroy K. Satterlee 2526 Washington, Dubuque.lA 52001 319/583-4830 quite a number of fliers are interested in reliving those ancient days of yesteryear. Bob and co-guru Ralph Prey have put to gether a listing of Nostalgia Ignition eligible models for your information. Although the MAMMOTH SCALE PLANS list probably has a few omissions, it is the CESSNA 180 - 108" Wingspan BOEING F4B2 - 90" Wingspan most complete list available in one place, CURTISS P40D - 102" Wingspan DOUGLAS 025C - 80" Wingspan and it can be yours by sending an SASE to BERLINGER/JOYCE P-18 - (102.5") F/W FW56 ’Stoeeer' - 103.5" Wingspan Bob Larsh, 45 S. Whitcomb Ave., Indi PAZMANY PL-4 - 105" Wingspan WACO/YKS-β - 99” Wingspan anapolis, Indiana 46241. The list contains F/W FW44J Stleglltz' - 89.5” Wingspan R YA N S -C - 112" Wingspan 140 designs, many of which are available DOUGLAS A1H Skyralder' - (120") T -2 8 B - 102" Wingspan from John Pond's plan service or from Bob SHOESTRING - 95" Wingspan STEVENS AKRON - 100" Wingspan F8F HELLCAT - 98" Wingspan WATERMAN ARROWBILE - 92" Span Larsh himself. BERLINGER/JOYCE OJ-2 - 102" Span BEBE JODEL D9 - 102" Wingspan B y the way, I speculated in the A p ril issue of EASTBOURNE MONOPLANE - 112" DYKE DELTA - 88" Wingspan Model Builder Free Flight that Korda's Plans are mailed by air: rolled in a heavy-duty tube. P40. T28B, Skyraider, Hellcat. Champion, Goldberg's Cumulus, and Stevens Akro. OJ-2. Dyke Delta and Eastbourne are $33.00 All others are $24.00. Denny Davis's San De Hogan would qual Please add $5.00 for postage and handling. California residents add 7% sales tax. ify. Let me clear up this misstatement. They Oversea orders add $12.00 for air postage. do not qualify. Sorry to mislead, just in MAMMOTH SCALE PLANS, 3351 Pruneridge Avenue. Santa Clara. CA 95051 · 408-244-5814 case! Bob also noted that the oft-promised up-* date on the NFFS Nostalgia rules, with list ing of new models and engines, w ill not be “High-A m p” Powerpole ready until early 1989. So, stop asking for it Modular "Silver Plated” Connector until then! WORD FROM THE WISE (« 0) 30 Amps * 600 V D C. Electrical Reastawi 250 Mcrolms MERCO "I would write a shorter letter if I had the Color Co-onlnaM iRed t Sadi Lean Houanq! time," by G.B. Shaw as reported in the O k ie Flyer. MERCO C/L & R/C ENGINES UPDATE ON EQUIANGULAR AIRFOILS Anderson Power SEN D 52.00 FOR CATALO G One of the real difficulties in being a Products. Inc. columnist is trying to determine just how Only certified checks or money orders accepted Minimum order CLASSIC REPLICA CL PLANS $1000. for three packages of 4 Power poles ($300 per package much you should take for granted that the * $ 100 Shipping and handling) CT residents add 7 5% sates tax Prices subject to change without notice BOLLY COMPOSITE PROPS readers know. The other difficulty is know DEALER INQUIRIES INVITED. For further information and MERCO PARTS & SERVICE dealer onces send SASE and Business Card to ing when to repeat features that have been covered in the past. Recently, I had my SERMOS RlC senses jogged by a letter from Jeff Hansen of SNAP CONNECTORS Hollywood, California. Jeff had read the ar Cedar Comers Staton Tom Dixon ticle on equiangular airfoils and had diffi Box 16787, Stamford, CT 06905 (203)322-6294 1938 Peachtree Road Suite 401 culty translating those curves into anything Atlanta, Georgia 30309 resembling an airfoil that he could use. His Sune Stark using this airfoil on his wing. suggestion: explain it in more detail. Good Stark’s ship featured a geared motor, and a idea! So, here goes: First, open your May is three-view can be found in the 1951-52 Zaic gave any performance. A new multispar sue o f Model Builder to page 63 and look at Yearbook. The model was very typical for wing of NACA 6409 was then produced as those curves. The bottom curve is one- its time, and return gears were not an un a replacement. The model immediately set percent "thick," and the top curve is ten- usual feature. Afterwards, the model press tled down to stable flight with no trouble at percent thick. The curves in between are in featured a number of articles pro and con all. increments of one percent, just like the about the proper airfoils to use on "Some time later I again tried the Stark coordinates that are listed. Wakefields. )ohn Barker was one of those wing section with the same results—violent To use any of them, it w ill be necessary to commentators and wrote in Aeromodeller glide stalls w ith probably 15-foot dips right copy the curve directly onto a sheet of thin in O cto b er 1954: into the ground. In desperation I took a plywood (1/32 inch is what I use). If the ". . . I have tried Sun Stark's wing section piece of string out of the model box and chord of the wing that you most often use is on a folding propeller Wakefield model. pinned it in front of the wing with six pins to longer than six inches, then I would suggest Occasionally this would turn in a good form a turbulator. The model was flown, you go to your friendly copier shop and en flight, but nine times out of ten it would de and although the glide was nothing like as large the curves to a more useful number, velop a stall when the power ran out and good as the NACA 6409, there was no stall. such as ten inches. Remember any of the continue stalling the w h o le w ay down. This Several flights were made afterwards chang curves can be shortened. could not be cured by any trim which still ing nothing but the piece of string. The re Once you have the right chord length,
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SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 61 Unmatched excellence in Design and Workmanship THE^DUBRO KWIK KLIP
The Ultimate Glo-Plug igniter for planes, boats, cars and helicopters. Powered by your Sub-C rechargeable nicad battery, the spring loaded Kwik Klip III locks onto the Glo Plug and provides a cons tant power source until you release it from its duty. For your convenience, the Kwik Klip III is available in two lengths; 1" for easily accessible engines and 3V2" XL (Extra Long) for models with concealed or hard to reach engines, and provides current to stan dard and 4 cycle glo plugs. A 125 mA battery charger is optional and is designed to charge your battery while inside the Kwik Klip III. It's safe, dependable and built to last a lifetime.
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DU-BRO PRODUCTS, INC · 480 BONNER ROAD · WAUCONDA, IL 60084 trace the curve onto the piece of plywood or two. By studying these examples, you Chevron Research who agreed to weigh the and carefully cut out along the line with a w ill get some idea as to how the successful samples on their laboratory scales. He ad sharp knife. Dress the plywood cut care fliers have been doing it, and you should be vised me that the 'Metier Balance Scales' fully with fine sandpaper. You can cut sev able to determine what you want to do. used are so accurate and sensitive that they eral thicknesses of curve and keep them for Jeff, I hope the above information is help can easily weigh the mark a pencil makes future use. Sketch #1 shows two curves on ful to you, and I hope that others who may on a piece of paper. one piece of plywood. In this way, you can have been too bashful to write will be in "To make the test more comprehensive, maximize your use of the plywood. Note formed enough so that they, too, can begin fellow SAM 8 fliers Tom Cope (now de that a small notch is filed into the leading to design their own airfoils. ceased) and Ray Chalker added samples of edge of the plywood. This notch is used to A WORD FROM THE WISE, NUMBER other covering materials. To minimize line up the airfoil with the datum line of the TWO chances for error, the pieces were stacked finished airfoil. "Simplicate and add lightness," Henry and cut to 2 x 2.5 inches. Except for the Sketch #2 shows how to line up the rib Struck as reported in the Okie Flyer. MonoKote and Coverite, the materials were pattern with the datum line. Note that the MODEL COVERING MATERIALS removed from models and were in their entire plywood template does not need to COMPARED by Bob Schafer finished flying condition. be used, as the equiangular section main This article comes from the Classic Flyer, "T h e w eight shown in 'O z./IO sq. ft.' refers tains the same curve throughout the entire the newsletter of SAM 8, Olympia, to the total area (top and bottom) of a 720- airfoil. Washington. sq. in. wing. Sketch #3 shows how a symmetrical air foil may be sketched using the same ply WEIGHT COMPARISON OF MODEL COVERING MATERIALS wood template for the top and the bottom Grams Sq. In. Grams/Sq. Ft. Wt. · of Silkspan Oz./IO Sq. FI. Brushed Finish Lt. Japanese Tissue .0955 2.7504 53 .970 3 cts 50/50 nitr. of the section. Lt. W l. Silk .1240 3.5712 68 1.260 5 cts 60/40 nitr. Sketch #4 shows how an undercambered Orange Skysail .1767 5.0890 98 1.795 4 cts 50/50 buty. airfoil might look using a thicker curve (say Black Silkspan 1811 5.2157 100 1.840 5 cts 60/40 nitr. White japanese Tissue 2389 6.8803 132 2.427 3 cts 50/50 buty + 1 ct. nine percent) for the top camber, and a thin tuelprooter ner curve (say two or three percent) for the Nylon Chilton .2395 6.8976 132 2.433 6 cts 50/50 buty undercamber. Red Monocote 2432 7.0042 134 2.471 As is Orange Coverite 3608 103910 199 3.665 As is In all cases, the use of these airfoil curves requires that the nose entry be pencilled in "Considering its combination of weight 'The results supported my belief that silk after the major curves are completed. and strength qualities, I believe that light is considerably lighter (by 32 percent) than There you are. After the actual airfoil is weight silk is the ideal covering material for silkspan. Each material has its own applica drawn, you will need to determine how free flight gas models. I also believe that it is tions and merits, so I make no claim for su best to place the spars, sheeting, leading much lighter than most other commonly periority. To each his own! For example, Ray and trailing edges, and the like. For these used materials. Chalker told me that he was able to remove important considerations, I advise you to "I recently gave a five square inch sample the nylon material he uses, in one piece, re take a look at the three-views that have been of black silkspan from my 'Westerner' and pair the internal structure of a damaged featured in this column during the past year white silk from a 'Rambler' to a friend from wing, and lay the nylon back in place.
62 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER ELECTRIC POWERED AIRPLANE KITS
PARTENAVIA P-68 VICTOR TWIN THE ASTRO SPORT Our popular PARTENAVIA P-68 kit has been comnplete- The Astro Sport is a cute little high wing sport trainer that ly redesigned for the Astro Cobalt 05 Motor. The airfoil sec is specially designed for schoolyard fun. Install the Astro tion has been changed to the Eppler-195 for improved Cobalt 020 Motor and you have a gentle and forgiving trainer aerobatic performance. The P-68 has always been a popular that is very easy to fly. Install the more powerful Astro Cobalt model at our electric contests, and in fact an Astro Cobalt 05 035 and it becomes a real schoolyard show-off doing snappy powered P-68 won first place in aerobatics at the 87 EAA rolls, loops, and other schoolyard maneuvers. The kit contains Electric Championships. The deluxe kit features all machine all machine cut and sanded parts and is super easy to build. cut and sanded balsa parts. Wing Span 50 inches, Wing Area Wing Span 37 inches; Wing Area 292 sq. in.; Eppler-195, 400 Sq.In., Flying weight 4.5 lbs. Flying Weight 22 to 28 ounces. K it # 1019...... $ 39.95 K it # 1013...... $89.95
THE ASTRO CHALLENGER NATS WINNER THE PORTERFIELD COLLEGIATE Bob Boucher’s Astro Challenger won the 84 Reno Nats its The Porterfield Collegiate makes a great sport scale electric first time out and has been winning electric sailplane contests model. It’s gentle and forgiving nature make it perfect for all over the country ever since. Powered by an Astro Cobalt beginners, but at the same time it can be quite responsive in 05 Geared Motor turning a 12 inch folding propeller, the skilled hands. The large wing and light wing loading lets the Challenger climbs almost out of sight in 45 seconds, and can Porterfield climb steeply to and land short. Just what you need repeat this climb three or four times on a single battery for flying in your neighborhood park or schoolyard. Beginners charge. The distinctive wing planform with elliptical tips max to R/C should install the Astro Cobalt 15 Geared Motor. imizes aerodynamic efficiency and minimizes tip stalls. It’s More experienced flyers can install the Astro Cobalt 25 gentle and forgiving nature make it perfect for beginners too. geared motor for very realistic scale like maneuvers. Wing Kit features all machine cut and sanded balsa parts. Wing Span 69.5 inches, Wing Area 690 sq inches, Airfoil Eppler Span 72 inches, Wing Area 612 sq.inches, Airfoil Eppler 193 193, Flying Weight 4 to 5 lbs. Flying weight 39 ounces. Kit#1020...... ___ _ $ 49.95 K it # 1018_____ .$ 79.95
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So, there you have it. A scientific test con converted to "the Velcro system." This is the ducted several years ago, but still good after E le c tr ic ...... Continued from page 25 best idea to come along since clear tape all these years. hinges! It is wonderful, wonderful, and SOME HUMOR FROM TERRY geared. The original wing design is very great! I use the 3/4-inch sticky-back Velcro THORKILDSEN strong; it uses a 1/4- x 1/2-inch spruce spar and run two strips down the back of the A few months ago, I did a recitation of w ith a 1/4-inch diam eter alum inum tube pack. I run two parallel strips in the plane, some of the humorous incidents that I had bound to it, then a 3/16-inch diameter steel on the floor, from just in front of the wing to seen around the contest circuit during the music wire dihedral brace inside the tube back to the radio area. In larger planes with last couple of years. Terry Thorkildsen, of which goes out a third of the span. It will two or three six-packs, I do the same on the San Valeers, dropped me a letter the not break! I went to this type of construction each fuselage side. Now the battery packs other day in which he told of some of his after a disastrous crash caused by a wing stay in place, I can easily shift them forward most memorable incidents. I thought I folding on an electric 05 glider that used and back, it takes no room at all, and adds would share one with you. twin spars, plus webbing, plus D-tube very little weight. The batteries do not move "I had purchased an old Fox 36X for $10 sheeting. The glider had gone up so far I even after rough landings, but they are easy and had it in a modified C class Texan. I had could hardly see it, so I spun it down, but to remove and put in place. Velcro is the an hopped the engine up and was running 40- broke the wing in the process. It broke at the swer to an electric flier's prayer! I have con percent nitro so it was turning up pretty outer edge of the center sheeting. That was verted my RC10 offroad car to this too; the good for a baffle-type engine. I was at one in 1976. Since then I have used the "steel in body is held on by Velcro, and so are the contest and on my fourth or fifth max and the wing" method and have never broken a batteries. In all the rough and tumble of was standing behind the engine tuning it wing. I do not use center sheeting; it is the offroad driving, the body and batteries have when I heard a distinct 'pop.' The front half place where stress collects and where not come loose. I buy the Velcro at a local of the crank with the prop still attached flew the sparwill fail. For those of you who have fabric store; it is $1.50 per yard of each type, out from the engine. had a wing break in flight, you w ill proba so figure $3.00 total for a yard of 3/4-inch "Gene Terra, one of my best friends, bly remember that this is just where the hook plus loop material. I use the hook ma casually stated, ‘W ell, you just can't get your wing broke. On the other hand, the conven terial in the plane and the loop material on money's worth out of $10 any more.'" Terry tional methods of wing construction the batteries, but I think it really doesn't sent along a couple of photos of his Astro usually do hold up well. Wing failures are matter which way you go. Star design, one of the NFFS Top Ten for not all that common, and usually happen There is another material similar in oper 1988. Find one or two elsew here in this only under extreme conditions such as a ation to Velcro, sold at Radio Shack. It is colum n. sharp pull out from a dive or spinning from much stiffer and uses knobby "locks" TH A T'S IT high altitude. which interlock (no hooks/loops). It is used That's it for another month. Hope it's A couple of columns back I described for installing car radios, tape players, CD been a good one for you. For me, I'm just George Lucas's method of holding batteries players, CB radios, etc. under the dash. This getting into the swing of the contest season in place with Velcro, and mentioned at the knobby lock material is incredibly strong, as I write this. I w ill catch a thermal for both time that I would try it. W ell, guess what? and I use it to hold down the electronic you and me this month. Cheerio! · A ll my battery packs and planes are now speed control in my RC10. It is like using
64 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Over60 RABIO CONTROL Fact-Packed PRIMER ModelingBooks
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BUGGY RACING HANDBOOK (R/C) INTRODUCTION TO ELECTRIC FLIGHT HANDBOOK OF SHIP MODELING Peacock Learn the «s and outs of dear , sttrt Veenstra Everything you need to know Con iers. 'ad« gear 4 rutaa Luts manutoctutrs 4 MANUAL OF ELECTRIC R/C CARS power Deta* an aspects of ettetne R/C fkgW structen motors. st«ring.*uctr SEPTEM BER 1988 65 smaller capacity diesels were made many years ago. The casting can probably accom FAI RUBBER modate no larger physical size than .03 cu SIZES: 1/4". 3/16". 1/8". 3/32". 1/16" bic inch without a new die being made. The Glow Plug . 042 thick one pound box. The conversion to glow ignition has elim i Price: $13.00 includes 4 oz. Slick Lube nated much of the diesel starting mystery Price: $1200 no lube (Slick costs $1.75) and greatly enhanced the idle. Although Postpaid in US via UPS' Cal. add 6% tax you can't tell it from the pictures, the glow Analyzers! plug begins life as a Cox #1032 part number 65 F/F kits, incl. Starduster, Coupe deVille four Satellites (now available), Dragmaster, which I send from the USA. In the summer The metered NI-STARTER® Zingo FA I Power, Tilka Wakefield, P-3Us, of 1985 I managed to visit Jan Garcic twice, from McDaniel R/C analyzes two pacifier tanks. Crocket hooks. Slick and he showed and explained the smart the condition of your glow plug lube, Seelig & K SB timers. Front ends, 3 and unique way he pressure casts his tiny prop kits, two kinds fuse, winders, all kinds each time you use it to start your crankcases. of hardware, books, and much more. engine. When attached, the dual On the left end of his workbench, a face ampmeter indicates a good, 1987 CATALO G S1.00 bracket holds a propane plumber's torch marginal or failed plug. Another like my grandfather used to sweat-solder F. A.I. Model Supply innovation from McDaniel R/C. joints. A small crucible is held in place at PO BOX 39V TORRANCE. CA90510 where the heat of the flame focuses its in • 1650 ma/hr recharge tensity. Metal pieces are put in the crucible able battery provides and the torch is lit. The crankcase die is 35% more starting firmly mounted to the bench. A small fun power than regular nel is precision-fitted to the top inlet of the nicads. FIBERGLASS PARTS die in preparation for pouring. Nearby, a • Dual-face ampmeter tPSTARTER' semi-rounded cap that precision fits the top ICInc 122010*» OVER 237 COWLS FOR KIT OR of the funnel sits in waiting. A retaining clip indicates plug M. MD 20769 130V. 772»1 i> < .«6 * 0 !;- SCRATCH BUILT MODELS. ALSO holds a piece of asbestos firmly to the in condition when OVER 34 ROUND COWLS attached. side of the semi-rounded cap. RANGING FROM 4” to 14%" DIA. The pressure casting process is as follows: & 55 DIFF. S IZ E & SH A P E W H E E L The torch melts the crucible's contents, the PANTS. funnel is inserted into the die, the semi- Model 205 shown. We custom make parts and rounded cap's asbestos is filled with water, Model 201 w 'charger jj vacuum form canopies. the molten metal is poured into the funnel Please send $1.00 for complete list to a precise level, and the semi-rounded NhSTARTEF T&D FIBERGLASS SPECIALTIES cap is quickly locked onto the funnel's top. (4WC Inc. 12208 G. At this point the moisture in the asbestos λ Ι*. M O 20789 OC' 30925 BLOCK, DEPT. 6, GARDEN CITY. Ml 48135 drips down on the molten metal and forms -272901 a 4A06JK PHONE (313) 421-6358 steam. The entire casting apparatus of BRAZED & HEATTREATED WIRE GEARS 8 CABANES die/funnel/cap is pressure-tight. The steam PH O N E (313) 261-9064 has no place to go. The steam exerts intense pressure on the molten metal. The results nuts and bolts, it holds so firmly. It is proba are one slick pressure die casting for an ^•STARTER other of Jan's jewels! He's really clever. ►Wine. 12208 0* bly too strong for battery packs, but would 5*. MD 20763 OB.. be useful for holding servos, receivers, etc. I This month's John glow engines have an 27801 & 4,406.» i> use it in 1/2- x 3/4-inch patches; larger unusually fine piston/cylinder fit; the en pieces are almost impossible to pry apart! It gines hold compression extremely well at would be ideal for holding down hatches, top dead center indicating a bit of taper ex too. There you have it! If everything seems ists internally that could not be used in his to want to fall apart, you have the means for e arlie r d iesel versions. The diesels require Model 208 shown, victory and to get it all together! free movement of the contra piston, and Model 204 w/charjjer Two contest reminders, the KRC meet is such freedom comes when the cylinder September 17 and 18 at the Buc-Le Aer- walls are 100-percent parallel, not tapering • .020" wall stainless steel osportsman field in Quakerstown, Pennsyl smaller toward TDC. The R/C diesel version tube, stainless steel spring, vania. Contact Bruce Fenstermacher, 636 he used to make had a very free floating direct connecting high temp, Schoolhouse road, Telford, Pennsylvania contra piston so the speed could be con teflon wiring with beryllium 18969, if you need more info. The second trolled by an ultra-tiny servo of a Cannon copper electrode. No sliding annual Dallas All Electric Fun-Fly will be R/C system that flew in a Smith Miniplane contacts to corrode. October 1, from 9:00 a.m. to 5:00 p.m. at (20 ounces total weight) built by Jan's good * Positive 6-point P l u g L o c I f Eastfield College, off 1-30 in Mesquite, friend, Bohumir Kracja. The contra piston will not strip or wear out. Texas. Contact Frank Korman, 5834 Good control was elaborate and delicate com win, Dallas, Texas 75206; (214)821-0393 af pared to the classic R/C carburetor of this • 110V and 220V AC chargers month's engine. available. ter 5:00 p.m. Enjoy the summer and fly high with electrics! · I chose to run the John G 05 R/C with muffled pipe, which he ran at 16,500 on FAI For these and other fine products from fuel. My 10-percent nitro fuel with only 10- McDaniel R/C, see your local hobby dealer Engines...... Continued from page 27 percent oil recorded a steady 17,600 w ith a or contact: reliable idle of 3,550 on a grey Cox 4-1/2 x 2 McDaniel R/C Inc. pair of half cubic centimeter .03 cubic-inch prop. Easy-starting, no rpm fluctuations, 12206 Guinevere Rd„ Glenn Dale, MD 20769 glow engines which appear conventional good acceleration from idle, almost un (301) 464-2260 FAX (301) 262-4433 but simply have to be admired for their ex believable. I hand-started, but Jan uses an Visa and MC accepted. tremely high level of jewel-like appearance Astro mini-starter. The piston/cylindertaper He take out of the hobby! due to choice of metals and their finishes. fit made hot restarts a verbally correct the hassle Serious collectors will immediately "snap," and one or two flips seems to work Nl STARTER· Patent ·ΙΧΤ72901 & 4.405.890 Plu*Lock-( Patent Pend I recognize the John touch in the photos, as every time. The R/C carburetor starts with a NI-STARTER·»» a rr* trademark of McDaniel R/C. Inc the crankcase castings for the miniatures straight pin to which a ratchet drum is •ϊβββ Me Dan-οι R/C Inc have remained the same since the first few silver-soldered. A jeweler's screwdriver is 66 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER BEGINNER TO EXPERT... KALT IS THE CHOICE KALT BARON 28 SUPER HELI COMBO The Baron 28 is a great economical choice for the novice. This is a very stable, precise flying machine which will give you hours of flying enjoyment. RETAIL CIRCUS ITEM# DESCRIPTION PRICE PRICE KBH28 Baron 28 Helicopter Kit $199.99 $159.99 WE1029RHS Webra 1029RHS Shuttle Engine 129.99 94.99 CH0036A 1.5V Glow Plug 2.10 1.99 K01000551 Heloball Muffler 25.99 23.99 KALT CYCLONE SUPER CH0001 Circus Super Starter 29.99 21.99 CH0016 12V Wet Cell Battery <5.5 amp) 19.99 12.99 HELI C O M BO IM63003 Silicone Fuel Line (Large) 3.20 2.99 MCDRC101 NI-HL-l Ni-Starter (w/Chargcr) 26.99 23.99 The Cyclone is the ultimate beginner helicopter JS6C2 Circus 6 AM Heli Radio (CH12,38-56) 226.99 169.99 which is as easy to build as it is to fly. Its super strong JRS506 JR 506 Servo (Reverse Direction) 38.99 26.99 composite main frame, belt driven tail rotor, Bell- CH236 Circus Handcrank Fuel Pump 15.99 11.99 K06030301 Circus Training Gear B-28 16.99 11.99 Hiller mixer, factory assembled collective pitch and HEUTIPS Circus Heli-Tips Booklet FREE rotor head can be built in 4 to 6 hours. This is a great SSUPER28 Baron 28 Super Heli Combo Price 737.20 563.88 choice for novice and expert alike. RETAIL CIRCUS SUPER COMBO PRICE $534.91 ITEM# DESCRIPTION PRICE PRICE KBHCYCLONE Cyclone Helicopter Kit $299.99 $259.99 WE1025RCH Webra 50 Heli Engine 129.99 109.99 KOI000553 Hcloball Muffler (for Webra 40/50) 28.99 24.99 CH0001 Circus Super Starter 29.99 21.99 MCDRC101 NI-HL-l Ni-Starter (w/Charger) 26.99 23.99 CH0016 12V Wet Cell Battery (5.5 amp) 19.99 12.99 CH0036A 1.5V Glow Plug 2.10 1.99 CH236 Circus Handcrank Fuel Pump 15.99 11.99 IM63003 Silicone Fuel Line (Large) 3.20 199 K06030302 Circus Training Gear 16.99 13.99 JRS506 JR 506 Servo (Reverse Direction) 38.99 26.99 JS6C2 Circus 6 AM Heli Radio (CH12.38-56) 226.99 169.99 HELITIPS Circus Heli>Tipe Booklet FREE SSUPERCYC Cyclone Super Heli Combo Price 840.20 681.88 SUPER COMBO PRICE $600.98 JR GYRO (JRJ110BB) WHEN PURCHASED KALT HELICOPTERS WITH EITHER COMBO - $10.00 OFF Manufacturers of the largest range of model helicopters in CIRCUS HOBBIES DISCOUNT PRICE the world, with a choice of 10 models from the Baron 28 to RETAIL CIRCUS COMBO the scale Baron 60 Longranger. PRICE PRICE PRICE $148.99 $124.99 $114.99 /το π m i π TO ORDER TOLL FREE 1-800-782-0022 HOURS M-F7KX) AM - 6:00 PM 3132 SOUTH HIGHLAND DR, LAS VEGAS NV 89109 SAT - 8:00 AM - 4:00 AM PACIFIC STANDARD TIME PRICES SUBJECT TO CHANGE w m e in r NOTICE system to its manifold. I didn't run the John = * (CANOPIES & SHADES) ^ G 05 normal, but I'm fairly sure its mani- fold/muffler is tuned also much like a For TIRED OF TRIPPING OVER ROPES AND STAKES? mula I racing AO's extractor pipe length is TIRED OF BLOWING AWAY? critical to maximum performance. CAN'T SET UP ON PAVEMENT? The John G 05 R/C gets a 10-point score for design, it gets a 10-point score for manu facturing excellence, and it gets a 10 -point score for performance for a perfect 30-point total. Unusual, but truly great. This is one of the world's finest engines. The R/C version can be bought for about $125; the other for slightly less. I can help you make proper contact if you write me d o M B . · Air/Space...... Continued from page 13 Th··· era the aun rigid frame sun shads a used by tha Academy of Modal Aeronautics for o fflca l shade at tha ble to those willing and able to spend $985 Nationals since 1983. per seat. For this ticket, patrons were flown Fast sat up by ona parson, compact storage, available in tvo about halfway to Hawaii and back, being styles, fla t top or peak top. 12 sizes available from 8 x 10 served snacks of caviar, smoked salmon, to 20 x 30. Tope available in blue, white, s ilv e r and sunscreen. Prices start at $75.00 complete F.O.B. French champagne, and pastries enroute. CLUBS: Shade the entire p it area, safely and econom ically Although your Model Builder reporters 40' to 60' specials. were not invited along, other media mem JED'S SHADE CANOPIES bers reported that about three-fourths of the 643 S. Brookhurst Ave. paying passengers were senior citizens, ob F ullerton, C alifornia 92633 viously very young in heart. (714) 773-9509 For the first time in a U.S. air show, the Soviets participated, arriving in style aboard a 240-foot wing span Antonov An- 124 "Ruslin," known in the West as a "Con WARBIRD CHECK-OUT VIDEOS dor." Although capable of lifting 171 tons of VHS & B E TA | cargo, its load on this trip from Moscow to WARBIRD CHECK OUTS—Vol. I WARBIRD CHECK OUTS—Vol. Ill Brown Field consisted of a light Mi-34 •Flying The P-40 War-hawk" COLOR! helicopter and a Sukhoi Su-26M aerobatic | The ν*Λν II Curtiaa-WMgM fighter. m od· famou· by in · Flying Tiger e "Flying The P-51 Mustang" The moat important tignter in th · 8th Fighter Command in England. It warn monoplane plus crew members and sup ‘Flying The F4U Corsair” designed built and flown in 117 daya | Check out th · temiller "bent·· wing wartime tight·· “Flying The A-20 Bomber” port personnel. •Flying The F6F Hellcat” T h · moat tamoua in a tong b n· of conventional Bght attack bom b·· aircraft Having examined all three national, and Slalla, Orvea. landing· and takeoft· a r· iu*t a pan of thia flying experience “Flying The P-39: Introduction" "Flying The SB2A-4 Buccanneer” Som e 0500 wet· built An unusual design with engine located mid-fuselage one of the Su-26M appeared in the May and noaewheai typo landing gaar T h · Bucc«nnMf found it· place in wartim· ectivihea aa a scout plan· 1986 Air International, and June's M o d el "Flying the TBF Avenger" "Flying the P-39: Advanced" Air-to-air photography demonstrating com b·! techniqu·» The P-30 Airacobra in high speed night maneuvers and combat Builder. NF132 — 5 Complete Programs, 2 Hr*...... Only * 3 9 ee NF-1S1 — 4 Complete Programs, 110 Min. ...Only ·3 9 ββ SPECIAL INTRODUCTORY OFFER! Although we were prepared for the out WARBIRD CHECK OUTS—Vol. II Any 2 Vols. #75·», All 3 Vols. #107·» standing performances of the copter and "Flying The Twin Engine P-38" the Sukhoi, we were totally unprepared for Got th · |ob of escorting u S bombers over enemy territory in broad dayugm CALL TOLL FREE the awe-inspiring flight demonstration of I “Flying The B-25 Mitchell Bomber” | Chosen by Jimmy Doolittle lor the famous Tokyo raid the Antonov transport. Supported by 24 •Flying T ' h e TVvin B o o m P -6 1 " IN CA (213) 827-8666 wheels, it looks as ungainly as a beached fh · " Clack Wirt, " sought out invisible targets with sophisticated redar Snapping Ped n U S A Canada Foreign Orders Add 15 00 I “Flying The TWin Engine A-26” SPECIFY BETA OR VMS CaMonsa Res Add ·** Sates Tm whale at rest. However, after running up its I Pilot's "hot ship." flying adequately on |ust one of >ls R-28O0 engines ALL MAJOR CREDIT CARDS tnduda No A Ezp Dm four massive turbofan powerplants, it ac INF145 — 4 Complete Programs, 100 Min...... Only * 3 9 ee Send to: NFV, 13470 Washington BtaJ., Ste. 308, Marine del Rey, CA 90292 celerated swiftly, rotated easily, and climbed away at a starnational, and one of the Su-26M appeared in the May 1986 A ir International, and June's Model Builder. Eliminates GLITCH problems associated with long servo leads. Although we were prepared for the out Eliminates need for voltage robbing chokes and other devices with standing performances of the copter and the Sukhoi, we were totally unprepared for leads over 15 " long the awe-inspiring flight demonstration of Modern CMOS 1C technology the Antonov transport. Supported by 24 Uses less than 0 5 milliamps at 4 8 volts wheels, it looks as ungainly as a beached Power lines are capacitor filtered STOP whale at rest. However, after running up its Available in 4 versions with connector installed: four massive turbofan powerplants, it ac 95- Single Channel, single servo drive (Single) GS-1 celerated swiftly, rotated easily, and 95- Single Channel, two servo drive (Wye) GS-1 Y climbed away at a startling angle. Takeoff S14.95 - Two Channel, two independent servo drive (Twin) GS-2 was followed immediately by a hard right S 17.95 - Two Channel, two servos per channel drive (Twin Wye) GS-2Y turn at low altitude, when it commenced a • Overall lead length is approximately 6" to 8” series of small-radius, steep-bank angle • Modeler must furnish own longer extensions as required turns that amazed us all. As Walt Mooney Specify Radio S1 00 Shipping and Handling on Pre-Paid orders, add put it: 'The noisy, boisterous crowd went μ ’ 6°o for California residents, Mastercharge and Visa. completely silent." Although Walt esti 22483 MISSION HILLS LANE, YORBA LINDA, CA 92686 (714) 777-1326 mated the flying speed at over 2 0 0 miles per hour, the sheer size of the behemouth performing gracefully and effortlessly so needed to adjust the throttle stop bolt and engine running, I lost a couple of hundred close to the runway made it appear to be the air bleed bolt. The exhaust system is rpm and got a shrill bunch of noise in their suspended by invisible wires. The fact that tuned because when I pulled it off with the place. Two tiny plastic seals fit the exhaust its swept wings incorporate ailerons, lead- 68 MODEL BUILDER ing edge flaps, Fowler flaps, and 16 spoilers is entirely beside the point. One simply doesn't expect an enormous cargo plane to be pirouetted around like that! But then, as a Soviet Cosmonaut once remarked on tele vision, "The laws of aerodynamics are no different on other continents." Sidelight: K&S For lUbing When the crew of the An-124 presented a fine display model of their aircraft to the San Diego Aerospace Museum, Master Museum Model Maker Ray Crowell had arranged for a display of Mig models to be on hand. Ap parently in appreciation, Ray was privileged to go for a ride in the Antonov. How's that for glasnostl Model builders are a fortunate group. An estimated 200,000 people attended Our carefully engineered line of metal Air/Space America '8 8 , and as with most products has unlimited uses in the de first-time endeavors, there were some prob velopment of all types of projects. All of lems. For example, the narrow roads lead your metal needs available in one place. ing to Brown Field were inadequate to han A L U M IN U M TURF RECTANGULAR BRASS TUBE (1 2 Ί SHEET METAL (4" * 1 0 Ί dle the massive influx of traffic. According STOCK SIZE PRICE STOCK PRICE STOCK PRICE to The San Diego Union newspaper, the NO EACH NO. SIZE EACH NO. SIZE EACH Concorde ",. .traveled halfway to Hawaii - 100 . 1/1ft 2 62 3 / 3 2 x 3 / 1 6 1.20 2 50 9 0 - 191 3 /3 ? 264 1 / 8 x 1 /4 1,30 251 .0 1 0 B ra s s 1.25 and back (1,500 miles) in less time than it - 102 1 /8 30 2 6 6 5/32 x 5/16 1 5 0 2 5 2 1 75 _L23_ took some spectators to drive from Chula - s /a y 2 6 8 3 / 1 6 x 3 / 8 1.75 2 5 3 3 0 0 104 ____3 /1 6 40 2 54 0 0 8 T in 7 5 105 Vista to Otay Mesa." (That's about 9 miles!) 7 /3 ? BRASS STRIPS (1 2 ) 2 5 5 0 1 6 A lu m 8 0 —LQ6 1 /4 2 3 0 0 1 6 x 1/4 .25 2 56 .0 3 2 A lu m 1 0 0 Once at Brown Field, parking was unpleas ------9 /3 2 55 231 0 1 6 x 1 /2 3 5 2 57 1 5 0 ant and costly ($5 per car), general admis ROUND BRASS 1 2 3 2 0 1 6 x 1 5 0 2 58 1 5 0 2 3 3 0 1 6 x 3 / 4 .40 2 5 9 _ 0 2 5 C o o D e r 2 7 5 . 125 1 /16 35 sion tickets were $1 2 , pit passes were $10, 2 34 .0 1 6 x 2 9 0 _ L 2 £ _ ____ 3 / 3 2 35 and bleacher seats were $2. No food or -1 2 7 - - 1 / B 2 39 .025 x 1/4 ...-3P. BRASS ANGLE (12") .239 023 x. I 72 -4.0 beverages were allowed to be brought in _ 1 £ 9 5 / 3 2 129 — 3 / 1 6 _237 _ ..025 λ 1 .70 side the gates, water fountains were con - 13 0 7 / 3 2 . 238 025 3/4 ^55. -2.3.1 1 / 4 6 0 239 _025_2_2. -L30_ spicuous by their absence, and refresh -1 ,3 2 - 9 / 3 2 6 5 -2-49 .032 ft 1/4 .35 241 0 3 2 x 1 /2 .5 0 — L33. S / 1 6 ments were expensive. To San Diegans 70 2 4 2 .0 3 2 x 1 8 5 1 3 4 . ____L 1 / 32 accustomed to free air shows at the Mira 8 0 « x . 1.35. 3 / 8 9 0 _ L & 1 ______-7Q 136 ____1 3 / 3 2 mar Navy Air Base and Oceanside Airport, 1 OO '9 2 ____ 5 / 3 2 _____ .9 Q _ 137 7 / 1 6 1.10 2 46 183 ___3/16___ ■6£._ these prices were quite a shock. 1 5 / 3 2 - 1 3 9 2 4 7 184 ___7/32______z a _ — L3.9. - 1 /2 185 1/4 75 In spite of everything, most people inter 1 7 / 3 2 -1 A Q 1.40 2 4 9 141 0 6 4 x 2 3 0 0 viewed felt the show had been worth the _____9 / 1 6 1 5 0 SOLID BRASS ROD 1 2 ) — !Δ 2 . 1 9 /3 2 1 6 0 SQUARE BRASS TUBE (12 ) 159 0 2 0 ΙΟ cost and frustration. (Walt Mooney at — 1.43 5 / 8 1 7 0 149 6 5 160 1 /3 2 12 144 ___ 2 1 / 3 2 ____ 1 8 0 tended on three different days!) Organizers 1 50 70 161 3 / 6 4 15 have promised to minimize the difficulties COPPER TUBE (12 1 151 1 /8 Square 80 162 1 16 2 0 117 _____ 3 /1 6 2 5 152 5/32 Square 9 0 163 3 / 3 2 2 5 before the next time. Four other cities, New 1 18 _____3 / 3 2 3 0 153 3/16 Square 1 1 0 164 1 /8 4 0 154 Orleans, Louisiana; Las Vegas, Nevada; — U 9. ------5 / 3 2 ___4 0 7/32 Square 1 2 0 165 5 / 3 2 6 0 155 1 / 4 S q u a re 1 4 0 166 3 / 1 6 8 0 120 -L/.8 _ 3 5 _ Houston, Texas; and Palmdale, California; 167 1 14 4 0 SOFT BRASS FUEL TUBING 112 1 BRASS STREAMLINE TUBE (12 ) have expressed interest in hosting the affair, 168 081 4 0 '2 ' I i /8 I r,o ' 2 2 S m a ll 9 9 169 _____ 0 7 2 2S however, Air/Space America president Bill Walsh is firm in his choice of Brown Field: Send 25 cents for catalog and price list. K&S Engineering, "There will be a 1990 show, no question, 6917 W. 59th St., Chicago. Illinois 60638. and it will be here." · Telephone: 312/ 586-8503. Tech Stuff.... Continued from page 17 span is about as logical as the way Wm. C. Northrop Jr. writes his name (the "C " stands for Walter). (Say w hatt) Strange or not, be cause they are so widely used, I am sticking with b=span and S-area. CuL»100W/bc(b+c). size (if the weight changes in a scale man W hen we divide weight in pounds by For small models, the cube loading will ner as the cube of the size); thus, big planes area (span times chord), and by the average be greater than the wing loading, and for can be accurately compared with small of the two, all in feet, we get numbers less large models the wing loading will exceed planes. As with wing loading, a lower cube than one. Since I find whole numbers easier the cube loading, as it should. Table 1 loading means a lighter airplane for its size. to remember, I'm multiplying the result by shows a few examples. The cube loading of unusual airplanes can 1 0 0 . TABLE 1 Tail "volume" coefficient, which is also a Airplane Span Chord Weight Wing Loading Cube Loading cubic function, is not a true volume. ft. f t . lbs. oz./sq. ft. lb./cu. ft. Neither is wing "volume loading." There R/C Sport 5.0 1.0 5.0 16.0 16.7 fore, to minimize confusion, I propose that R/C Sport 10.0 2.0 40.0 32.0 16.7 we call our new comparison number sim R/C Pattern 6.0 1.0 8.1 21.7 19.3 ply "cube loading." Also, let the abbrevia Zlin 50, full-size 28.0 4.8 1586. 188.6 36.0 tion for cube loading be "C uL." W e Zlin 50, 1/4-scale 7.0 1.2 24.8 47.2 36.0 shouldn't use just CL, since that already Lockheed Electra 55.0 8.3 9750. 340.6 33.6 stands for "control line," "center of lift," Gossamer Albatross 96.0 5.7 175 3 S 0.3 "coefficient of lift," and maybe more. We We can observe several things from this be surprising. Look at what the Gossamer now have: CuL-100W/S(b + c) or table: Cube loading does not change with Albatross has (including "powerplant" SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 69 A THERMAL CHARGER If what you are looking for in an electric sailplane is, good looks, easy to build, fun to fly, and great perfor mance, Thermal Charger is the one for you. G m p r e c i s i o n I I I PRODUCTS INC. (714) 592-S144 510 E. Arrow Highway, San Dimas, CA 91773 because it should be greater. That larger ^naffio r€cnhc/ cube loading of his is what really tells the JET ENGINES Box 1962 Lawrence, KS 66044 story. W e have used cube loading to show that EPOXY MIXING PAD you have a better-performing Zlin than he R e u s a b le — F le x ib le — D u ra b le has. H e should have used cube loading, be fore he started building, and seen that he must keep his 1/6-scaleZlin down around 5 pounds (a cube loading of 24.4) in order to c = C * have an adequately docile airplane. Cube JET-X 50, DYNA-JET, TURBONIQUE, P-38, loading is very handy. If we use it, we can VALVES. PLANS. AND BUILDERS SUPPLIES. SURPLUS CAS TURBINES. avoid making poor-flying models! Another interesting observation is that D YN A -JET ENGINE...... $ 195.00 JET-X ENCINE KIT ...... $ 22 .5 0 the units of cube loading are the same as JET BUILDERS NEWSLETTER...... $12/Yr Use pad to mix epoxies · paint - anything, safer & CURRENT COPY...... $ 1 .0 0 the units of density, pounds per cubic foot. cheaper W ipe clean with paper towel for immediate reuse 25 PC. CATALOG...... $ 5 .0 0 or let glue cure and pop it off later Nothing will adhere That makes good sense, since both cube DOYLEJET to the pad loading and density are measures of weight 4015 San Jacinto St. #404 D per unit size. Forget wing loading. You will HOUSTON. TEXAS 77004 (713) 440-4744 3” Pad * $3.95 find CuL much less confusing and much more useful. weight). the cube loadings of rubber-powered I can see some of you looking at the But 24-8/I0 pounds sounds like a lot fora models run? clock. I know you want to get out and fly, 7-foot-span R/C model. It is. Let's see why, Let's say you want to make a quarter-scale but class isn’t over. W e have some more, but and ways in which cube loading (CuL) is Zlin, Z-50L model. First, calculate the true- related, new ground to cover. useful to model builders and designers. scale weight of a quarter-scale Zlin. (True- PERFORMANCE FACTOR W e don't build our scale models to exact scale model weight equals full-scale weight In the December 1987 issue of RCM, in scale weight. Experience has shown that if times the scale factor cubed.) You come up his column, "Big is Beautiful," Ken Runes- we do, they are too hot for us. It is usually a with 24.8 pounds, which you know is more trand addressed the use of a "performance matter of human limitations. If a hand- than you want. From experience, you build factor" to compare and evaluate airplanes launch model is too hot, we can’t throw light and end up with a total weight of 17 and to help design them right in the first hard enough or run fast enough to launch it. pounds. In Table 1 we see that any size com place. Stinton also reports on a similar per In R/C or CL, excessive speed may be more pletely scale Zlin 50L would have a cube formance factor. The factor Ken reported than the pilot's reflexes can keep up with, loading of 36. (Without the table, we simply was inverted from the one commonly used, and very fast R/C models fly out of visual calculate the cube loading for the Zlin, or but both factors involved both wing loading range too fast. They might also require any other airplane, large or small, from the and power loading. In other words, how larger fields than we have access to, and data we have on it.) Now let's see what cube heavy and how powerful is the plane for its their greater speed would make them more loading the 17-pound model has. Note that size? A potentially useful tool, but it has the dangerous (hard to duck and capable of do the cube loading is directly proportional to same limitation that wing loading has, ing more damage). Therefore we usually weight, so it is simple arithmetic again. The since it incorporates wing loading! It, like strive to build our models as light as practi cube loadingof this model is 36 x 17/24.8 = wing loading, is not independent of size. cal, so they will fly slower and require less 24.7. Ah ha, you are ahead of me! W e can use power. To fly scale models moderately Another modeler decides to build a 1/6- cube loading in place of wing loading in slower than their true-scale speeds, we scale Zlin. It ends up weighing just six our performance factor and have just what must make them moderately lighter than pounds. W hich of you built the lighter air we need! Fortunately, power is already basi their true-scale weights. plane for its size? Let's find out. W hen you cally a cube function so the power-loading And how much lighter is "moderately divide the 6 .0 pounds of his plane by its part of the performance factor is okay. lighter"? By means of cube-loading num wing area and span plus chord, his cube Full-scale designers use horsepower in bers, we can accurately see how much our loading turns out to be 29.2. Surprise! Be their performance calculations. Some of model weights vary from scale and how cause weight should vary as scale cubed, our model engines have a power rating at a one model compares with another model his Zlin, which is barely a third the weight specific rpm, but we usually don't know of the same or different size. I'm just begin of yours, is actually significantly heavier for what power we are going to be flying at. An ning to use CuL myself, so I can't give you a its size and will have to fly much faster for easier measure of relative power for us is lot of tried-and-true data yet, but it looks its size than your Zlin. His is quite heavy. displacement. What we really want to like full-scale cube loadings are usually in Comparing wing loadings would have mis know is how large an engine are we going the range of 25 to 50. Most R/C models are lead you. His wing loading is 25.64 oz./sq. to need, and by large we mean, "how many in a CuL range of 10 to 25, with some of the ft., while your's is 32.38. The greater wing cubic inches"? scale models near the upper end. What will loading of the larger plane doesn’t count, Therefore, I propose that our new and im- 70 MODEL BUILDER proved performance factor be cube loading times displacement loading. The units will be pounds squared divided by cubic feet and cubic inches. For example if a 6 -pound model with a CuL of 15, has a "60" in it, it A-PIus. has a displacement loading of 6/0 .6 - 10 lbs./cu. in. Multiply that by 15 and we have Carl Goldberg Models’ Epoxy Plus" Glue wins top a performance factor of 150. That is a very good airplane. I don't have enough data yet marks for more of your modeling needs. to know what performance factor a barely- flyable "dog" would have. Please write and Epoxy Plus has a unique, flexible-strength forumla that really passes give me some examples. Can a model with the test in high-stress areas like firewalls and spar joints. a performance factor of 1,000 fly? And what What’s more, Epoxy Plus is lighter than ordinary epoxies, it isn’t are the best (lowest) ones you can find in “runny,” and it doubles as a carveable, sandable filler. models or full-scale? Epoxy Plus. It’s the smart choice in epoxies, and it’s at your local W e now have a performance factor that differs from the old ones that used wing loading, so we must give it a unique name. Okay, if you insist, call it, "Reynolds Perfor mance Factor." I guess I can live with fame. (It runs in the family, you know. Osborne Reynolds has had his Reynolds Number for about 100 years.) (Whatever happened to C- for-Walter Reynolds? w en) The abbreviation for Reynolds Performance Factor is RPF. Different types of model engines put out different amounts of power per cubic inch of displacement, therefore we need to stan dardize the relationships. In the March 1988 issue of Model Builder, Stu Rich mond, in his "Ramblin'" column, reported on some relative power assumptions that are being used. They are doubtless more ac curate than my guesses would be, and they already have a little acceptance, so I will use them. Stu's numbers didn't include Davis Diesel conversions. That factor is from my own experience. M y friend and loading. the same lift coefficient and have the same colleague, "Wiggie" Wigdor, contributes Let's look at ways to use our performance speed-range ratio. W ill someone check me the factor for the Quadra-type two-stroke factor. Assume two airplanes of the same please? gasoline engines. So, until someone im design and with the same RPF, but of differ Each value of RPF is not a point represent proves upon it, we have Table 2. ent size. (Because of Reynolds number, two ing a single type of airplane, but a curve TA BLE 2 airplanes of different size will perform representing a range of airplane types. Now Displacement Loading Formulas somewhat differently, but the effect of R.N. comes that neat part! W hen we plot a fam Schnuerle-ported glow engines: DL - is usually small.) One of these assumed air ily of these RPF curves, as shown in Figure l.OOW/disp. planes is "heavy" (has a high cube loading), 1, we have a mighty handy tool. W e can Loop-scavenged glow engines: DL - but is "powerful" (has a low displacement now pick the proper size wing for a given 1.25W/disp. loading or power loading). The other is engine and weight of plane, or pick a Quadra-type gasoline engines: DL - "light" (low CuL), and has a high power proper size engine for a given wing size and 1.50W/disp. loading, yet it has the same Reynolds Perfor airplane weight, or pick the weight we Four-stroke glow engines: DL - mance Factor as the first plane. These two should build to for a given engine and a 1.50W/disp. airplanes will fly at different speeds, but given wing size! Know any two values and Davis Diesel conversions: DL - their performance will be comparable select the third. 1.00W/disp. otherwise. It looks tom e like they will fly at If you were exposed to Math Analysis 101, Antique Diesel engines: DL = 1.75W/disp. Antique spark-ignition engines: DL = 2.00W/disp. MAP Argus Plans & Drawings Since RPF is independent of size, we will use it to compare scale models to their full- P la ns Free flight plans-vintage, scale, competition & gliders. scale prototypes, so we also need a stan H a n d b o o k U-Control plans-vintage, scale & competition. dard relationship between horsepower and O n e R/C aircraft plans-scale, competition, sport & gliders. model engine displacement. There are many factors that prevent us from getting an P lans Boat plans-sport, power, sail, competition, yachts & steam. accurate and invariable reading on this, but H a n d b o o k Car plans. the ratio of one to two looks like a good T w o Plans for steam, petrol & traction engines. Locomotives, average. That is, a power loading of five buildings, cannons & clocks. pounds per horsepower is roughly equiva P la ns lent to a displacement loading of ten H a n d b o o k Scale drawings of military, civil, private & light aircraft, pounds per cubic inch. In other words, on T h re e as well as scale drawings of military vehicles. average, our Schnuerle glow engines de Every type of plan for the scratch builder. All ______velop about two horsepower per cubic inch catalogs $3.00 each, or all 3 for $7.50. Spec- j ^ LUPPERGER PLANS (give or take a horsepower or two). There ify catalog desired, and make your check pay- ’ ’ 1 3 0 4 pa|m Avenue fore, Reynolds Performance Factor equals able to J.M Lupperger Plans California resi- Huntington Beach, CA 92648 cube loading times displacement loading dents add 6 % tax. Allow 2 - 4 wks delivery. or cube loading times tw ice the power SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 71 There are times when you can’t settle for less than the best. ...Choosing a battery pack is one of those times! SR No matter what brand of receiver or transmitter you use. no matter how old or new it is SR makes a better battery pack for it! Why better? Because SR nicads are Aerospace grade. They're screened and matched for reliability and they give „ you far more flying time than ordinary nickel cadmium cells. In fact, these are the same cells we use in the packs we make for NASA and the Military ONLY SR puts EVERY pack through 5 days of tests to make sure EVERY pack is perfect! We even gua'rantee them to never form a "memory!" Not only that. ONLY SR gives you a choice of 19’different cells, from 50mah to 5000mah. in any shape pack, with any connector you'd like1 o If it's time for a new receiver or transmitter pack, give us a call or send us a self-addressed, stamped business size envelope for full details. We II be glad to answer any questions you might have and «, help you pick the right pack. Our Hotline is % open weekdays from 9:00 a m. to 3:00 p.m Just call 516-286-0079 SR Batteries. Inc. Box287 Bellport, New York 11713 SUBSCRIBE NOW (Starts with next published issue). The REAL how-to maga U.S. Only (includes APO and FPOI: One year(4 issues) ■ $12.95 Tw o years(8 issues) $24.85 zine on all types of mod Overseaslalso Canada and Mexico): One year only-$21.45 includes el boats and ships; R/C, postage & handling. Payment must be in U.S. funds, drawn on a steam, electric, sail, rac U.S. Bank. ing, sport, static and Name ______Sig. ______operational scale. Also Address ______construction articles on all types, with full-size C ity ______State______Z ip ______ plans and patterns avail Visa or M/C No. |Add 5%) ______Exp. D a te ______able, complete with re print of building instruc BACK ISSUES AVAILABLE - Limited supply. $4.00 per copy. U.S. add 50V per copy, outside U.S. add $1.50per copy for shipping. tions. U.S. BOAT & SHIP MODELER, 898 West 16th St., Newport Beach, CA 92663 72 MODEL BUILDER " AWY =YS,!MS LucifER With an 075 HYPERTHRUST motor, fused switch harness, propeller adaptor and 8 / 4 fibreglass propeller. The LUCIFER has a computer—optimized E-193 airfoil for a superb L/D and a tremendous speed range ideally suited for all fliers because of its inherent stability. Had enough of flat-bottom wing floaters that barely stagger up a couple of hundred feet? Build the LUCIFER and enjoy the performance that you expect! Big enough to fly like a sailplane should but small enough to repeatedly climb to "Pin-Head" altitude on a battery charge. Pre-cut fuselage sides, accurate die and machine cut selected woods, complete rolled plans, hardware, detailed instructions and a one piece wing with spruce spars for strength and simplicity in building. Special Combo Price 6 7 5 TOWER LANE $6995 S Y S T E M S w e s t C H E S T E R p a 1 9 3 8 0 i JORPORATION 215430-8645 you will recognize these curves as a family performance! rial that you cut out on several places along of rectangular hyperbolas. The name may I, for one, am very curious to see where the length of the blade (let it hang sus sound imposing, but they are really very certain full-scale craft and where different pended by only a tiny part of the adhesive). plain and user-friendly. The formula for a types of models will fall on the sheet. Find the place where the material will rectangular hyperbola is simply xy=k or, in Please send me data for your areas of inter make the lighter blade balance the heavier our case, cube loading times power loading est and I will try to publish it. I can predict one. It may be at the end, the center, close equals Reynolds Performance Factor. Each that rubber-powered models, for instance, to the root, or any place in between. curve represents a different value of RPF. will fall on the left side of the plot, but just W hen done, you will have two blades The curves are theoretically accurate and where? O f course, you will have an addi equal in weight an d with the same length enable us to estimate the RPFs of points tional problem in plotting up rubber- w ise center of gravity. Now hover your (plotted for various planes) lying between powereds. W hat is the equivalent displace chopper and look for any vibration, then set them. The whole picture is a convenient ment or horsepower of a given rubber mo it down. Observe the blades to see if cen visual method of comparing the perfor tor? Any suggestions, other than dynamom trifugal force has pulled them out to form a mance of any number of different airplanes, eter tests? straight line, or if they form a slight angle. If independently of their sizes. W e could This has been fun, for me at least. I hope they form an angle an d you were getting make up tables of cube loading, power I have neither lost too many of you nor some tail shake, your ch o rd w ise blade loading and RPF for various airplanes, but I bored too many of you. Next month we will center of gravity is probably off. This can be think the curves are much easier to use and start on a series of chapters on model corrected by moving a tiny weight (wheel give better insight. weights, materials, and structural design. collar, flybar weight) along the length of the I've included the plot points for a few full- Until then, design with cube loading and flybar in the direction of the larger angle. scale airplanes and models, but I don't have RPF. Do this until the vibration stops. much actual data available to work from. Francis Reynolds, 3060 W. Lk. Sammam This method will correct your vibration Anyway, individually you are going to be in ish N., Redmond, Washington 98052; problem most of the time. You may want to terested in comparing many different types (206)885-2647. · do some major surgery on the blades some of airplanes and models, so plot up your time in the future to get a perfect lengthwise own. Just copy Figure 1 and start adding an d chordwise center of gravity, but that's a Choppers.... Continued from page 19 more airplanes to it, or use a clean piece of subject for another time. paper and plot and draw your own blade. (2) Cuta piece of stick-on covering to TRIMMING OUT YOUR CHOPPER rectangular-hyperbola curves first. Remem use for balancing. That piece with the back First flight. (1) Preflight check. Im portant! ber, it is just xy=-k. Use as many or as few ing removed should weigh as much as the So basic, yet a most frequently ignored different k (constant) values for as many amount by which the heavier blade ex procedure, particularly by experienced guide curves as you want. ceeds the lighter blade. (3) Put the blades pilots. Notice that the models have lower RPFs on a balancer like the High Point, Schiuter, A. Check all controls for proper direction than the full-scale planes. Not only do we or Tech Specialties balancer; or remove the and all throws and end point adjustments build our models with lower cube loadings rotor head, attach the blades so they extend (particularly for collective pitch). than full-scale, but also with lower power or straight out, and suspend the entire rotor B. Check tail rotor compensation to see displacement loadings. We want from the flybar. (4) Place that piece of mate that it's operating in correct direction, and: SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! 73 IN D IA N A PO LIS FUN-FLY, |une 4 and 5 (714) 642-3799 Congratulations to Dan Chapman, of Dayton, Ohio, winner of the autorotation contest. Defending champion Dwight Shilling, of Carol Stream, Illinois, had one auto 1-3/4 inches from the "pin" but lost on ΉΜΠ the total of the three autos. r The ‘super’ systems World and National champion Curtis Maneuver, mix, adjust, u Youngblood gave an exhibition with his "Dork," a G M P Stork with a pro-head in reverse and monitor. T 1 We introduced expo rates! AA stead of the stock DDF head. The unusual Three, six and eight channels radio setup that Curtis uses for inverted fly ing was a surprise to me. His JR Century VII “STILL THE BEST!” Single Stick radio is set up to go from plus nine degrees at full stick to minus nine cMILLCOTT degrees at low stick. In the Idle-Up mode Millcott Corporation the throttle actually increases as pitch goes 177-F Riverside Ave. Newport Beach CA 92663 from zero to minus nine. The effect of all this is that he can fly inverted without using an inverted switch. This is basically the way p e c k Silver-Streak that Mike Maas, one of the pioneers of in verted flight, did it before radios had an in verted flight function. Curtis is so talented that he can reverse the controls in his mind, and in going from upright to inverted and back, the transition is perfectly smooth. RUBBER POWER,C02,ELECTRIC Worst idea since President Carter gave QUALITY KITS,PLANS, TISSUE.PROPS, away the Panama Canal: The new A M A fre BEARINGS, WHEELS AND MUCH MORE quency flag system. · 035 ELECTRIC MOTOR 002 ENGINES SUPER LIGHT WEIGHT ELECTRIC TELCO ■ MODELA ■ BROWN ■ DAVIS W EIGHT ONLY 2.6 O Z, USES LESS CURRENT Ram blin'...... Continued from page 15 LOWER CURRENT MEANS SMALLER BATTERIES ALSO NEW I THE " 1300 R/C BLIMP" TURNS 6-3 PROP 12000 RPM , ONLY 6.S AMPS CATALOG #30 - $ 2 .0 0 museum worth. Class showcases are IDEAL FOR SMALL RIC S FREE FLIGHT stocked chock full in a hobby shop at F L Y 3 0 T O 48 INCH WINGSPAN MODELS mosphere in addition to building tables MOTOR ONLY $19.95 Peek-Po/ymers R/C OR F.F. SYSTEM $62.95 ' BOX 2498 LA MESA, CA 92044 that fill the club room. The interview PHONE (619) 44B 1818 continues: Stu: Ivor, if a kid shows up with $5 on a Saturday afternoon and wants to get into WE SET THE PACE! model building, what happens? Wilshire Model Center Michigan's most complete supplier of Ivor: Well, we try to talk him out of model kits & accessories— if it's spending a big sum. W e try to sell him the featured in Model Builder Magazine idea of the 75-cent glider project. For the 75 we probably carry it in stock. cents he gets the cutout bits and he gets the We love to help beginners as well chance to sit down and be taught to build. I as the dyed-in-the-wool enthusiasts. usually use two kits. I'll do one while the Give us a try! youngster does the other. It works great! I’ll M EM BER show him where and how to sand and glue; Radio Control it works fine. The lesson takes about one- Imported and Domestic Sailplane Hobby Trade and-a-half hours; as you and I know it could Specialists, R/C Supplies, Gelst Association Electric Flight, Multiplex Radio be done in five to six minutes without the one-on-one teaching by using CA glue. Mon.-Fri.: 10-8 Wilshire Model Center 7845 Wyoming · ta rtm rn . Ml 48128 · (313) 9336567 Stu: That's giving of yourself. W e all need Sat.: 10-6 2836 Santa Monica Blvd. Sun.: Flying! Santa Monica, CA 90404 17900 E. 10 M ils Rd. · E. Detroit, Ml 48QZ1 · (313) 7734294 to do it if we're going to replace ourselves. Owner: Bob Ratzlaff 213/828-9362 35203 Grind River · Farmington, M l 40024 · (313) 4770206 Ivor, we met last week at a little town of We gladly accept Visa & MC on orders over $10. 106 S. Uvemol» · Rod w stK Ml 48063 · (313) 601-8842 4500 people at Waikerie at the 40th Aus tralian Nationals. That was your— Ivor: That was my 27th consecutive Nats. C. See that gyro is operating in correct E. Be sure the engine needle valve is They're all waiting for me to die or knock direction. With gyro and transmitter on, backed out the right number of turns. me off. I'm the big attender, and Leo twist helicopter left or right. Tail rotor servo F. Final check of transmitter setting. All O'Reilly is right behind me. I'll keep doing arm should move rapidly in opposite direc dual rates, idle up, invert switch either in it as long as I have the strength. But, Stu, my tion for just an instant, and then move back proper position or disengaged, all trim but BIG goal is to get M AAA into its own three- to its original position a little more slowly. tons and levers in proper position. Don't story premises which today would cost Sometimes people miss seeing that first rely on the setting you had last time you about half a million dollars. W e could lease movement and only see the second, then used the radio. These can easily get moved the lower two floors and occupy the top for they set the gyro in the wrong direction. in your flight box, carrying case, or even our museum and offices. Logically it would just while setting the transmitter on the be in our nation's capital city of Canberra If done incorrectly, A, B, and C can result ground right before starting the engine. It's where the city was carved out of a paddock in a crash immediately on liftoff. a good idea to work all the controls before (field) halfway between Sydney and M el D. Check all clevises, ball links, starting the engine to make sure everything bourne. As modeling grows with Australia's pushrods, etc. to see that nothing has is connected and working. A single switch growth, we could occupy more of the build broken or come unattached. Also check all out of position, such as Idle-Up being en ing maybe. pivot balls, nuts and bolts, and screws for gaged, can cause a disaster before the flight Stu: Ivor, you have one of the world's looseness. even begins. finest model engine collections. How did it 74 MODEL BUILDER start? Ivor: Well, I couldn't afford an engine be fore the war, nor right after the war neither. But Australia's big model manufacturer and The Real Thing. wholesaler had just had their propeller carver die. They were looking fora replace ment in 1948, and I was "it." They were im Here’s the truth. porting the Mills diesels then. So I hand- Cut-rate copies and “spackle” products just don’t measure up carved 314 six-inch diameter props and got to Model Magic’s superior strength, bonding capability and shrink- paid for it with my first motor, a Mills diesel. free stability. I taught my wife Vera to carve too. W e kept Fact is, Model Magic"' simply has more of what it takes to records, Stu. W e hand-carved 25,000 pro make a high-quality, lightweight, easy-sanding water-thinnable pellers (it took seven years), and we got paid modeling filler. So whenever you’re tempted to take a cheaper short a penny an inch. M y take-home pay in those days was about seven pounds per cut, remember this. You’ll probably be getting exactly what you week, which was respectable right after the pay for. . war! Go with Model Magic. It’s the real GOLDBERG Stu: Ivor, what would you like to do with thing, and it’s at your local dealer’s now. M O P E L S the rest of your life? Ivor: I believe modelers should be shown the need of fostering juniors and be pre pared to really do something about it. What I want to do is see a $1 million scholarship fund established for an Australian scholar ship in every state and territory of this great country. The fund is only $225 for each pre sent M AAA member. I've written the first scholarship check to MAAA. I could devote my remaining years to the scholarship fund. Stu: How'd you get VH-1 as your license number? Ivor: Well, there was an existing small or ganization of modelers here. But nobody was interested in getting the Australian modelers into the great international brotherhood of modeling, and I was! I thought we should belong with others in C 1988. Cart Goldberg Models. Ira FAI. This country is a bit like America; we used to say FAI stood for Federation of Anti quated Ideas, but it's not so. If FAI is not good for modeling, then it is the fault of America and Australia for not making it H AVE YO U TRIED FULL-SCALE? good. Australia's FAI competition has been quite good in the past ten years, partly a AFTER YOU DID ALL THE WORK, WHY LET tribute to Gordon Burford's efforts. In the YOUR AIRPLANE DO ALL THE FLYING? beginning I pushed for FAI affiliation or INFO S3 00 BUILD & FLY THE miniMAX YOURSELF! membership. Finally, I sent a membership application in 1948 with an English pound note (a lot of money) to France. That's how I got VH-1. There were M AAA numbers at that time. I was #328, but they were subse quently dropped in favor of FAI numbers in dicated by the "V H " prefix for Australia. That ends the interview with one ot the world's most colorful model builders. The glider Ivor teaches the kids to build is the "Doonbat," and the photo shows how he mass-cuts the parts. Since he lives in the 01 ...... * Computer Designed * 3 Axis Control AWARDED SUN-N-FUN 8 6 . Part 1 0 3 ui,ra|ighl · Easy construction Doonside district of Sydney, you can get the “ Most Innovative New Design" · wood Construction name connotation. Ivor bought from the USA a huge carton of Cox engines at a rela TEAM INC . BOX 338M, BRADYVILLE. TN 37026 (615) 765-5397 tively low price per engine; like from "re turns" at the Cox factory. The Australian government taxed him unmercifully upon scale modeler, learn hard financial facts construction (located at the top, bottom, import which elevates the cost per engine from a hobby importer and distributor, visit and side positions). W hen both sides are miserably. Then he designed a simple U- a couple of the more active hobby shops, completed, the cowling framework resem Control model called the "Doon-Fly" with and leave Sydney to ramble around New bles a drum; wrap with 1/32 sheet and add a Perfect-type fuel tank, dual plywood fire Zealand's model builders. Stay tuned. · the three 1/8 -indi thick rings at the front of wall with the landing gear sandwiched be the assembly, cross-laminating as you go tween. Then he had 500 of the models kit along. Finally, sand the front rings to a XBY-1...... Continued from page 53 ted. U-Control flying near Sydney, smooth, rounded contour. Australia, is leaping forward with new formers, consulting the plan for inside and Landing gear. This is the only unusual activity. outside diameters. The cowling should be aspect of construction. Although the land Ramblin' around Sydney, Australia, a built directly over the plan, using half-shell ing gear must be firmly attached to the major world city, proved to be tremendous construction, with lengths of 1/16 square fuselage, it must also be springy enough to fun. Next month we visit a world-class R/C stringers to hold the formers in place during absorb rough landings. The main landing SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 75 VINYLWRITE CUSTOM LETTERING Providing an elegant, time saving and economical finishing touch for modelers. • E Z T O A P P L Y · Our lettering comes to you pre-spaced & pre-aligned. Saves hours of cutting & the fuss of aligning individual letters. These are not decals. Your text is custom computer cut in fuel proof premium vinyl · only 2 mil thin · vertical or horizontal text · custom lengths · 13 colors 6 typestyles inc. Military Block · slanted or upright text · V t" to 12" high Priced right with no minimum charge! For example, you can have your AM A number in 2 " high text, any color, for only $3.00 + P & H. Call or write for complete info All orders processed upon receipt pack & sample. IT ’S F R E E ! and shipped via first class mail. VINYLWRITE CUSTOM LETTERING Fly 16043 Tulsa Street VINYUVRITE Custom Lettering Granada Hills. CA 91344 on your model today! (818) 363-7131 (between Noon and 6PM pst) Mail order only! CA res. add tax. · exhaust stubs are added right before paint ing. The entire model is medium gray, ex MULTIPLEX MODELTECHNIK cept for the tops of the wing and horizontal HOBBYPOXY Gmbh of West Germany offers to you: tail surfaces, which are yellow-orange. The —True narrow-band conversion technology color was Aerogloss dope applied with an TRUE TWO-PART EPOXY PAINTS —The finest equipment artist's mouth atomizer. 16 COLORS + CLEAR + PRIMER —Competitively priced A separate instrument panel, if you want EPOXY GLUES — Beemer-Multiplex V IP Service one, can be added at this point. All of the FOUR FORMULAS * 5-MIN TO 45-MIN (T h e b est) "windows" are thin acetate. The main cock — Full stock of accessories and parts pit structure was built up from short lengths FAST FILL GRAIN FILLER of 1/16 square basswood, covered with ace Send $5.00 for new catalog in English QUICK-PREP POLYESTER RESIN tate, and then gray paper window frames. or call us: (602) 483-9577 All of the black lettering ("U.S. NAVY" and FREE COLOR CARD AND BROCHURE tail codes) are pressure-sensitive letters ap HOBBYPOXY DIVISION, Pettit Paint Company. Inc. plied to clear decal sheet that are then trans B E E M E R R/C W EST D IST R IB U T O R S INC. 36 Pine Street. Rockaway. NJ 07866 ferred to the finished model. Control sur 7725 E. Redfield Rd., Suite 102 face lines were done with a black, Pilot Scottsdale. Arizona 85260 brand, permanent fine-line marker. The four "star 'n' ball" insignias are best created from color-doped tissue or decals, if you're gear wire is bent as shown on the plan and built as separate units but grooved to accept lucky enough to have them. Three access glued in place on fuselage former F4. Add a the main gear wire. Lots of sanding sealer steps on the right rear fuselage can be simu doubler on top of the wire to complete the and lightweight spackling were needed to lated with rectangles of black tissue. sandwich arrangement. fill and smooth the landing gear contours to Finally, a word or two about the simu On my model, I ran an additional wire the streamlined shape shown in the accom lated corrugations: All of these were drawn from F2 to the main gear wire and soldered panying photos. The finished model has with light gray ink in a capillary technical the two together for additional strength. several thread "wires" attached to the land pen. In order to get neatly spaced lines, This brace strut wire was anchored to F2 ing gear that were simulated with very fine each of the tail surfaces was laid out on my through a short length of 1/16 aluminum sewing elastic. drafting table, the 1/8 -inch rulings lightly tubing glued into F2. The balsa landing Finish and details. The entire model was drawn in soft pencil, and then inked-in, gear structures, wheel pants, and brace strut covered with white Japanese tissue, alcohol using a T-square to insure good alignment. were then built up around the wires. Each shrunk, and given two coats of very thin, AT THE FLYING FIELD brace strut, for example, was made up of clear, nitrate dope. As a general rule, try to Several nine-inch propellers were tried, two 1/16 x 1/8 lengths of balsa that were do as much detailing as you can on the but they all seemed about equal to the task. glued around the brace strut wire and then separate assemblies. The scrap details, like A commercial plastic prop was eventually sanded to shape. The wheel pants were the ribbed flotation gear, intake scoop, and selected. Power comes from two loops of 76 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER THE TEAM DOES IT IN THE DIRT. oil-filled racing shocks. These custom Roce the cor that beat the A ssocia ted shocks use machined alloy cylinders and custom racing drill blank shafts for silky smooth action. imports in the toughest kind ot shocks off-road competition. Rugged, yet light, the suspension gives The All-American Associated Competition you oil the adjustability of full size, full race R C IO took hom e the gold in modular buggies. The A-arm/Boll joint design allows both the ROAR ond ORRCA precise camber, caster, ride height ond National Championships spring rote tuning. Even anti-roll bars Our RCIO turned back the and o VariLok dif are included. foreign cor invasion with the Exceptional ground clearance and same racecar technology that low center of gravity also contribute has kept Team Associated on to the superb balance ond perfor top of the RC car racing world mance of the RCIO over all types for over 15 years of terrain. T6 aircraft A RACE CAR. NOT A TOY. alum inum GET THE JUMP ON THE COMPETITION. Sure, you've heard that before m on o co q u e tub Go RC off-road racing with the But Team Associated designs leoders. The National Champion and engineers only model RACE cars RCIO is available nowand legal for Fully a . Fro n t The new RCIO features fully adjustable, four sk id pla te ROAR ond ORRCA nationally sanc 4 w heel wheel independent suspension, an aluminum tioned competition. Independent alloy monocoque tub ond race-proven hardware suspension Complete RCIO kits, replacement throughout. parts and spares are readily available through And the RCIO doesn't need expensive model cor racing's most extensive dealer accessories ond modifications to handle the network. roughest tracks. The strength and durability is Take the challenge and build yourself a winner. standard equipment. Team Associated's RCIO. Sealed gearbox VariLok RACE-WINNING ENGINEERING. differential For maximum traction ^ the RCIO suspension S m o o th undercarriage maximum ground clearance is damped by long throw. Model cars tor Reol racers. Full race rear suspension includes bulletproof halt shaft ond u Joints with tapered and Associated Electrics keyed modular wheels. Quick release knock 3585 Cadillac Ave., off design tor last pit work and tuning. Costa Mesa. CA 92626 (714) 850-9342 ® 1984 Associoted Electrics Custom Aviation Prints and Original Paintings Custom made photo prints of the several most recent Model Builder COVER PAINTINGS by Bob Benjamin are now available. INCLUDING: Gee· Prints of all future Model Builder COVER PAINTINGS will also be available. If you have something special in mind, Bob is pleased to discuss creating new originals on a custom commission basis. F°* complete detais on ordering print» or to inquire about original paining» call or write: Robert A. Benjamin Aviation Art 1222 26th Ave. N.E., Olympia, WA 98506 (206) 352-2602 It is suggested that you leave an enlarged slot for the stabilizer, should small up or Big Birds...... Continued from page 9 down adjustments be needed during trim and six-bolt hub and came up with a dandy The CORE House ming. Once the model is trimmed, the little engine that should fit most anywhere. open areas around the tail can be finished Also, the engine comes set up with a me WPVP got njjvs for the designs you want with gray tissue and the tail struts added. chanical spark advance that will interface Triple Your F u n - Him Cores Him- ffinjs How does it fly? The model now puts in with any ignition system using Deans plugs, regular flights of 45 seconds, with occa like the C.H. Electronics unit that's proven GOTCHA 400 813.95.824.95 sional joy rides in excess of a minute. It is to be so reliable these past years. GOTCHA 460 - 813.95 $24.95 capable of impressive altitude, and it surely I'd scrounged this very early (#2) proto Lonestar - 814.95/825.95 looks like a craft that might have been flown type from Al before he'd had a chance to GOTCHA 500 - triple cores 816.95 by Don Winslow of the Navy! wring out any of those first few engines, so double wing kil 822.95 REFERENCES we were both surprised when initial run Kohn, L. j. (January 1973). Consolidated ning showed that this Sachs 40 doesn't like C o m b at Kit s and Accessories XBY-1. A rm ch air Aviator, Vol. 2(1), 44-45+. standard spark advance settings, which is eend il for catsloj The Core House/Phil Cartier Larkins, W. T. (1961). U.S. Navy Aircraft, usually somewhere between 28 and 32 760 Fallonville Fid 1921-1941. Concord, CA: Aviation History degrees. Skifpoj- it,duct li « .ir. Huramelslown. PA. 17036 Publications (p. 121). Y'see, because of her porting, this baby ph. I717I5M-3910 6-10 pm EST Munson, K. (1972). Airliners Between the just loafs and doesn't even breathe hard Wars, 1919-1939. New York: MacMillan. when advanced to a mere 32 degrees. She 3/16 FAI, 26 inches in length and braided to Wagner, W. (1976). Reuben Fleet and the has to be coaxed with another 10 to 11 take up some of the slack. The finished Story of Consolidated Aircraft. Fallbrook, degrees, and then she comes alive . The ad model was slightly nose-heavy, requiring a CA: Aero Publishers. · vance on my engine figured out to be 43 tiny glob of clay on the tail cone. A 1/8-inch degrees, which is within a degree of what down-and-right shim was needed for thrust Al's setting his production models. adjustment. A quarter of a turn C C W on the low- needle valve brought the idle down to a steady, reliable 1500 rpm. No matter how long she was left ticking over, jamming the Bulkhead Fittings throttle all the way open brought an imme diate and smooth burst of power. From Fourmost I was going to tell you that I like this en gine, but, in truth, I've fallen in love with it. The Bulkhead Fittings are a simple method Outside of wishing that the needle valves to feed fuel and vent lines through solid bulkheads. were easier to get to while the prop was swinging and having a slight case leak that 1. Drill hole with No. 18 drill in any size seems to have abated (after all, it was a pro bulkhead or firewall up to 3/8 in. thick. totype), I really can't find anything to nit 2. Insert the shaft of the Bulkhead Fitting pick about. There have to be a whole slew through the hole. of BIG Birds out there that need a light 3. Screw the nut onto the ______1 weight hummer like this up front. backside of the fitting. T And you have three choices when it comes to sound reduction. Go with the 4. Slip on the fuel or vent MM easy conversion of a SuperTigre 2500/3000 tubes and the job is done. _____ can (it does a surprisingly good job), or a The Bulkhead Fittings provide a sealed u custom-made muffler from either B&B tank compartment and eliminate fuel Specialties, Inc. (14234 Cleveland Road, line chafing. Granger, Indiana 46530) or A & M Aircraft Color coded for easy identification. Supply. Weight: 1/2 gram each. u One last item: Although the engine came with a standard size spark plug, I couldn't Price: 2 for $2.95 No. 121 Size: 3/32 in. I.D. run it because all my C.H. Electronics igni 4040 24th Avenue tion units are set up for the small 1/4x28 f o u r m o s t p r o d u c t s Forest Grove, OR 9711( NGK plugs. Enter good buddy Lloyd (503) 357-2732 Marohl who made a slick adapter from an old spark plug in less than an hour and MODEL BUILDER 78 Cover Artist Bob Benjamin Bobcat Mark II Construction article Feb 88 Model Builder. The original Bobcat w as featured in Jan 85 Model Builder. See opposite page for Famous Aircraft prints available from Bob Benjamin euite City's Instant G lues As a professional aviation artist and model builder, I set the highest possible standards for my work. Knowing that airplane lovers everywhere look forward to my magazine covers, I feel a strong obligation to produce my very best work. My model building is an extension of my artwork; every plane I build, whether for a magazine article or just for fun, has to be the best I can do. So, naturally, I insist on the very best building materials. Satellite City products meet these high standards because they are industrial grade. I've been building model airplanes since the early 50's, and have never been more pleased with any products than I am with "HOT STUFF- glues and accelerators . Since SPECIALTY came out, everything I build is even lighter and. "HOT STUFF': is I've stopped using epoxy completely! SPECIAL SUPERT | “HOT STUFF’! Whether you're just getting started, or are a seasoned "pro", „ ^ CA — | you can rely on "HOT STUFF" products to back up your good «WAKfouje INSTANT GLUE work. Speaking of "backing up your good work", that Satellite ♦W IM UAW0*0· City LIFETIME GUARANTEE is great! This company really mwtM.tm.iot knows how to take care of the modeler! "HOT STUFF" was the first, and "HOT STUFF" is still the best. Hob Benjo»»" FOR YOUR FREE TIP BOOKLET AND INFORMATION ON VIDEO-TIPS *2 SEND SELF ADDRESSED, STAMPED ENVELOPE TO: Satellite City P.O. BOX 836, SIMI VALLEY, CALIFORNIA 93062 (805) 522-0062 SEPTEMBER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 79 pair isn't where I want to be. I'd rather be de veloping new engines, but the broken ones keep coming in so fast that I have very little Techno power’s time for R&D." "W ell, when is the chan geover?" I asked. "And who will be doing the repairs from now on?" "Al, I can't tell you who they are right now, but I can tell you NEW that we’ve already started training these people. We've had a great relationship with Saito and we're trying to make sure that the quality of repairs doesn't suffer because of this changeover." "Sounds good, but who B I G B O R E should guys be sending their broken en gines to in the meantime?" "It's all been worked out," he commented. "For the time being, engines will still come to us, and we'll make sure that they get taken care of. W hen the new repair people are ready to take over, we'll let everybody know." Natu « ' y ' / i * ' ' ' rally I asked about the R&D he'd men tioned. His response was: "W ell, a couple of twins, one five cubes and the other ten cubes, may be coming down the pike. The smaller one will use the new Sachs 40 parts. And we're probably gonna come out with a lightweight, low- cost single that'll be somewhere in the 30cc range." So, for now, send your broken, abused, galled, and seized Saito directly to A&M Aircraft Supply for fixin', and Mr. W il laert will see that it gets into the right hands. THE EXPRESS Air Flair's new Express is their second BIG Bird offering, following closely behind the popular Impulse Plus. This 81-inch, mid-winged taildragger's airframe should mate well with any 1.2 -cid to 1.5-cid engine (if you keep her light the O.S. 1.08 "Boxcar" could also be used) and her 110 0 square inches of area allow for a very comfortable wing loading of 26 to 27 7 Cylinder • Master Rod Runs on Needle ounces per square foot. Bearings 4 C ycle According to the Air Flair guys, the 12.5- • Rocker Boxes Are Investment Cast. Overhead Valves pound prototype was "awesome" with a Su- Glow Ignition Balance of Engine is Bar Stock perTigre 2500 up front, which is not hard to Displacement 2.0 cu. in. • Hardened and Ground Steel Cams believe because of the excellent power-to- Red Line RPM 9000 • Hardened and Centerless Ground weight ratio and favorable W/L. Flying RPM 8500 Valves W hat does it cost? Send $125 plus $5 6-5/8” Diam eter • W eight 30-1/2 oz. shipping and handling (add $ 8 if CO D ) to: Hard Chrome Bore Air Flair, P. O. Box 2075, Fairborn, Ohio FOR INFORMATION, SEND 13.00 TO Cast Iron Piston Rings 45324; (513)878-7487. 14/6 -16/8 Prop Range TECHNOPOWER II INC. PUN OF THE MONTH 610 North Street Extra Heavy Crank Shaft I thought I might put a knight doll in my Chagrin Falls, Ohio 44022 Supported By Ball Bearings old BIG Wimpy; but on second thought, I Fore and Aft wouldn't put a knight out in a dog like that. Phosphor Bronze Valve Guide Al Alman, 16501-4th Avenue Court East, Spanaway, Washington 98387; (206)535- 1549. Don't forget to start planning now for the winter building season, and keep those an adapter can be made without too much passed on these instructions for making cards and letters and photos coming, folks. trouble in case your ignition, like mine, is one of your own: Safety first! · "Crush or break all the porcelain and tailored for the small plugs and your engine has the usual BIG, gaping spark plug hole. then punch out whatever is left in the mid Insiders...... Con tinned from page 49 dle. What you want to end up with is the SAITO REPAIR CHANGING HANDS bottom threaded part. Make sure that you In a recent conversation with Al Willaert, record-breaking flight of 52 minutes, 14 clean it up, especially if it's from an old, I found out that A&M Aircraft Supply is go seconds, Jim Richmond writes, in his NFFS used plug. ing out of the Saito engine repair business. article mentioned previously, "I can hardly "Then, puddle in silver solder after plac I needled Willaert. wait to build an even lighter plane." Unfor ing this threaded shell on a piece of "What's the matter, Al? Are guys flying tunately, these unrestricted models have aluminum. too good now and not breaking enough en developed to a point that they require skill "The last step is to drill and tap for the gines to keep you and your people busy?" in construction and handling possessed by NGK plug." Hopefully, telling you that I "No," twanged Al, "as a matter of fact, only a few individuals. used a small plug with an adapter will blow they’re flying more and dorking more In addition, the endurance of these the misconception that only standard-sized planes than ever before. The problem is that models is such that a contest would be im plugs can be used effectively in gas burners. the repair business is too good." "Huh?" 'It's practical if there were more participants; T'aint so! Also, wanted to let you know that like this, pardnuh. I realized that engine re and the time required for their construc- 80 MODEL BUILDER THE FOX 50 IS HERE! Light enough for 40 size airplanes. Powerful enough for 60 size airplanes. ★ ONLY S I 2995 ★ ★ INCLUDING SPINNER AND ★ ★ TILT DOWN MUFFLER. ★ ★ ITEM NO. 25000 ★ How often have you wished for a little more power in your 40 size model, hut couldn't see putting a big. heavy 60 up front? At 11% oz. (bare), the Fox 50 fills this need. The energetic, user friendly Fox 45 has been stretched to give the extra torque necessary to handle an 11* prop with authority — yet it retains all its user friendly n atu re . For the technically minded, here is some pertinent data: Some things you should consider when com paring the Fox 50 with other brands: Bore - .907 Every Fox m otor is test run at the factory and checked for idle, full power, throttle Stroke — 790 response, and compression. Only motors that meet our performance standards Schneurle ported and double ball bearing, of course. are sold. Most of our competitors are reluctant to spend the time and money The crankshaft is machined from one piece of SAK 86L20 steel and is surface to check run their motors and risk spoiling the exterior appearance. We think hardened and tempered. The crankpin is ground before heat treat to retain it is more important that the motors run well. its hard skin. The finest motor in the world is no good if a part is broken and you can't get another. The piston is cast from low expansion 390 alloy and is fitted with one free floating Fox owners can get a part prom ptly by calling 501-646-1656, giving us the motor piston ring made by our patented process. size, part name or number, and a Visa or Mastercard number. The 7/32 dia. tubular wrist pin is retained by our unique m llpin retaining system Duke Fox has been building model airplane motors here in the U.S.A. since 1943. which results in a considerable increase in bearing area and a corresponding I^b o r is 100% Am erican and all material, except ball bearings, is Am erican increase in life. m a de . The cylinder is of hardened steel with a carefully tapered and crosshatched bore. The sturdy connecting rod is machined from high strength alum inum bar and is fitted with a bronze bushing in both ends. The cylinder head uses the two piece button design, which results in a more accurate com bustion cham ber than a one piece casting: and. also, has a m uch stronger glow plug thread. FOX CREATES MANUFACTURING CO. 'Hie crankcase is pressure cast from 384 alloy, which is considerably stronger than 5305 TOWSON AVENUE the alloys most m anufacturers use. Also, the design utilizes our patented high OTHERS FO R T SM ITH. A A 72901 back door feature, which resists compression stresses belter than the P H O N E (501) 646-1656 conventional design. IMITATE BUY AND FLY ONE. YOU W ILL BE HAPPY W ITH IT. tion, combined with their ease of destruc biplanes (triplanes if the large stab is tion, has discouraged many modelers from counted), without exceeding the specified participating in this event. weight. Since the Pennyplane was origi AIL/RUDDER The overriding effect of wing loading has nally conceived as a beginner's category, a two main effects as far as rule-making is new class, the Novice Pennyplane, had to COUPLER concerned. First, by requiring a higher be introduced to provide a model of sim Installs between Rx & servos. wing loading, the rule can limit the endur pler construction. Connects rudder to aileron chan ance as much as desired. Second, if rules The three categories, AM A Intermediate nel ONLY with rudder stick at do not limit the wing loading directly, Stick, Easy B, and Novice Pennyplane, all neutral. Allows independent or builders will seek any means within the contain restrictions that tend to increase the crossed controls! $37 rules to reduce the wing loading. One ex wing loading. Though these provisions ample of this tendency is seen in the design were probably made primarily to simplify CONTROLLER of models for the FID category. Originally, construction, they have the desirable result Turn 2 items on or off in the span was limited to 65cm to reduce the of reducing the endurance. The methods of dependently - from 1 channel! size of boxes required to transport these limiting the wing loading are different, Switches 1 amp to 20 volts $37 models, and the minimum weight of 1 gram however, and have different effects on some an d —- accepted! was established because European builders of the desirable characteristics. JOMAR, 2028 Knightsbridge Dr. felt that they did not have access to the best In the case of Novice Pennyplane, the Cinti., OH 45244 / 513-474-0985 quality balsa wood and were therefore at a weight is specified and the wing area is es disadvantage in trying to make the lightest sentially fixed by specifying both the span Also, by requiring a relatively heavy cov possible models. Over a period of years, the and chord of the wing and tail. The specifi ering material, the builder is encouraged design trend of these models has been to cation of weight is considered to be some (somewhat inconsistently) to make the use wider chord and larger tails to get as what undesirable because of the difficulty framework just as light as possible, resulting much lifting surface as possible in the 65cm of checking this value at a contest. Also, in a fragile model that is subject to aeroelas- span. The aspect ratio has been reduced to with the propeller diameter, motor stick tic effects, and that requires careful han such an extent that these models must now length, and overall length also specified, dling. The other specifications of wing be very lightly constructed to make the the model design is essentially fixed and dimensions and tail area result in essen model as light as one gram. If the builder does not offer a very great design challenge. tially a one-design class with little design cannot reach this weight, the one-gram rule In the case of Easy B, the weight is in challenge. becomes inoperative. creased by specifying paper covering and In the case of the AM A Intermediate Another example of efforts to reduce the by requiring solid motor stick and boom Stick, the covering material is specified as wing loading is found in the Pennyplane and by prohibiting bracing (except when either paper or commercially available category. In this class, the rules specify the made of wood). The specification of cover plastic film. This type of rule has the same weight, but the wing area is not restricted ing material is considered undesirable be disadvantages as it does lor the Easy B. except by specifying the overall length and cause there is no assurance that the mate There is no assurance that a commercially projected span. rial used (condenser paper) will remain available film as light as microfilm will be Builders found that they could build available or be consistent in properties. available in the future. Also, in this class, the SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 81 less fragile than a braced model. By eliminating bracing, one of the most diffi cult and time-consuming steps in building a model is avoided, and the model is much easier to repair at a contest. In the opinion Why buy an imitation when of the author, microfilm is an easier cover ing material to handle than either paper or thin plastic film. In fact, some builders put you can have the real thing? such film on hoops and handle it like Zap adhesives are the most imitated microfilm. Perhaps microfilm was avoided in the Easy B and Intermediate Stick models products in the hobby industry. Yet with the hope of making these models eas nobody has managed to duplicate Zap ier for beginners. According to the recollec quality. Doesn't that tell you something? tion of the author, however, when microfilm was introduced in the thirties, when there were more genuine beginners than today, these youngsters found little difficulty in doing a good job with microfilm, and, with its use, they immediately produced models that were graceful, beautiful, and capable "THE TOTAL ADHESIVE SYSTEM " " of much longer endurance. (To be con The Real McCoy. tinued next month.) · Regional Sales Offices: Black Star. .. . Continued from page 10 Ho u m o f Balsa tobort Frank Tlano Enterprises 20130 Slate Road 310 North 5lh Street 2460 S W. 85th Terrace expensive reed engines. I would recom Cerritos. California 90701 St Charles. Minors 60174 Davie. Florida 33324 mend using either the Black W idow engine (213)860-1276 (312) 584-7616 (305) 473-2211 or the best .049 engine for the money, to Manufactured by Pacer Technology. 1600 Dell Avenue. Campbell C A 95008 ZAP is a registered trademark of Pacer Technology me, the Dragon Fly. Don't be turned off by the Vee-tail, al wing area is specified. This method of con aspect ratio. Selecting too small an aspect though you will need a mixer to produce trolling the size of the model may be some ratio would result in a model with too small turns or pitch control. The model is very what undesirable because the wing area is a wing area, whereas selecting too large an easy to fly and can be flown by a rank a difficult quantity to check at a contest, es aspect ratio would increase the wing beginner. Let's get to building. pecially with planforms that are not de weight excessively. scribed by simple mathematical formulas. The tendency, however, would be to a THE FUSELAGE As mentioned previously, the specifica large aspect ratio than currently used on Start by cutting out the two fuselage sides. tion of model size by fixing the span, as in F1D models, resulting in more graceful Next, using white glue, glue the 3/8 triangle the case of F1D, results in long, ungainly models. A good way to require larger values stock to the fuselage sides. Be sure to make models, whereas fixing the area causes of wing loading would be to eliminate ex one right and one left side. Now cut out the problems in checking the models. An in ternal bracing and to rule out attached brac fuselage formers. Glue F-2 and F-3 perpen triguing method to limit the size would be ing such as boron filament. The need to use dicular to the fuselage using five-minute to specify the maximum wing chord. This unbraced cantilever wings of fairly high epoxy. Now glue the other fuselage side to quantity would be very easy to check at a aspect ratio would require spars strong F-2 and F-3. Now install F-1, F-4 and F-5 contest. The designer would have the enough to withstand the loads in flight, using five-minute epoxy. It is time now to challenge of selecting the best span or and, as a result, the model would be much install the main landing gear and the ply wood braces. Finally, add the top and bot tom sheeting. Now carve the top edge of the fuselage WILLIAMS A TT}C round and sand with medium-grit sand BROTHERS paper. Add the triangle firewall reinforce ment and the 3/32 balsa doublers. Next, cut out the hatch from 1/8-inch plywood. Fi {PILOTS nally add the 1/8-inch dowels. This com STANDARD · SPORTSMAN pletes the fuselage. RACING · MILITARY T H E W IN G Start by cutting 5/16 inch off the trailing W H E E L S ► edge of the two tapered panels and the one VINTAGE · SMOOTH CONTOUR BALLOON · GOLDEN AGE constant chord section, bringing the trail ing edge thickness to 1/4 inch. Because the wing molds don't match perfectly, it is (ENGINES necessary to sand the wing's root and tip PRATT & WHITNEY · WRIGHT · LE RHONE sections smooth using medium-grit sand paper. Now cut out four trailing edge fillers PARTS) from 1/8-inch balsa; see plan. Glue two to PRATTZa t t * & t u WHITNEY/u i t m c v ·. icLE RHONEDunuc gether making them 1/4-inch thick. WRIGHT · GNOME Next, take the constant chord wing panel and draw the wing sweep angle on the bot tom of the wing; refer to the plans. Using a ^ G U N S J , coping saw, cut out the sweep angle. You should now have a right and left wing sec ■ ■------>- ■ · · = ; tion. The plans show the right wing section LEWIS ^ VICKERS · SPANDAU · PARABELLUM full size; the left side is a mirror image of the right side. Glue the trailing edge filler to the SEND S3 FOR FULLY ILLUSTRATED CATALOG right and left side of the constant chord DEPT. MB 181 PAWNEE ST. SAN MARCOS, CALIFORNIA 92069 8,0s sections. 82 WHEN CONTACTING ADVERTISERS. TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Performance Blended Fuels Just Imagine . . . and Cooler • Castor Protection Without Carbon Buildup! rning Higher Nilro! • Consistent Runs, Gallon After Gallon. ection Without an Without Constant Needle Valve Ad justments! • Smooth, Reliable Transition to Full • All Quality Blended in the Most Modern, Throttle and Back to Idle Without the Most State-of-the-Art Facilities in the Engine Quitting! World! Well, you don’t have to leave it up to your imagination anymore. You can now run a full range of BYRON ORIGINALS PERFORMANCE BLENDED FUELS. Byron Originals fuels have been researched ex Each and every supplier of raw materials has been tensively to provide the best of all desired qualities in a hand selected to become more of a partner with us in the fuel. Our first testing was to meet the stringent fuel business than a mere supplier. As a result, only the demands of today’s high performance ducted fan finest quality methanol, nitromethane and lubricants are engines. Our subsequent testing ha:·, proven, regardless shipped to our blending facilities. But this is just a start. of whether you fly sport, pattern, helicopters, or are The freshness of the methanol and nitromethane are into boats or cars, your engines deserve the same type guaranteed during our storage with a special nitrogen gas of top performance potential and uncompromising displacement system that continually protects these lubrication protection of our Performance Blends! We materials from moisture contamination . . . the fuel you feel, as you do, that regardless of the level of your receive is as fresh as the day the raw materials were investment and involvement in R/C, all your engines delivered to us. deserve as much protection as is available. Synthetic or Synthetic/Castor Blend ... It’s Your Choice Byron Originals Fuels are available in both a Synthetic/Castor Blend and a total Synthetic, each in various nitromethane levels to suit your individual needs and the needs of your engines. And each blend provides top performance and maximum protection in all types of engines. Byron Originals Modified Castor .. . Unlike Any Other With our Synthetic/Castor Blend, you can have your cake and eat it too! No other castor treats your engine to all the high temperature lubrication, boundary and shearing protection (available only from castor oil) without the carboning and varnish build-up normally accompanying a castor blend. Extreme Pressure Lubrication and Anti-Corrosion Additives Make the Byron Synthetic a Safer Fuel to Run Our Synthetic is custom blended to our specifications to provide not only the load bearing capacities of castor, but to provide effective and long- lasting corrosion protection . . . something rarely provided by Synthetic Lubricants! Computerized Blending Facilities Assure Consistent Blends One of the biggest complaints of modelers, regardless of engine type, is the unavailability of a consistent blend, gallon after gallon. That’s why we worked just as hard on designing our state-of-the-art blending facilities as we did on the fuel formulas themselves. Our computerized metering systems guarantee the same accurate blend, regardless of temperature fluctuation. That means you can rely on freshly blended fuels, season in and season out. Factory Price* Factory Price* Order No. Retail Per Gallon Per Gallon Item (per case) (Per Gal.) (1 to 4 Cases) (5 to 10 Cases) Byro-Jet 5% Nitro 3130005 $10.95 $ 7.50 $ 7.00 Byro-Jet 10% Nitro 3130010 $12.95 S 8.50 $ 8.00 Byro-Jet 20% Nitro 3130020 $17.50 $12.00 $11.25 *AII prices include shipping wilhin the 48 contiguous United Stales. Alaska, Hawuii and or order direct: Overseas, call for shipping quote. Prices subject to change without notice. Fuel available in case lots only. Minimum order, 1 case. Byron Originals, Inc. · P.O. Box 279 · Ida Grove, IA 51445 Dealer Inquires: Phone (712) 364-3165 Fuel Orders Only: Phone (712) 364-2009 * * * * ************** PACER S c a le M asters TECHNOLOGY (ZAP) invites you to the 1988 SCALE MASTERS CHAMPIONSHIPS SEPTEMBER 15-16-17-18 FORT KNOX, KENTUCKY HOSTED BY SO. INDIANA RADIO-R/C CLUB & KNOX MODEL AIRPLANE CLUB * * ******** ********************** CONTEST DIRECTOR: CONTEST MANAGER AMA RULES Dale Arvin (812) 283-5719 Dave Voglund 3428 Charlestown Pike (502) 351-9776 Jefferson, IN 47130 ********** ********************** 1988 REGIONAL FLY-OFFS VOLUNTEER STATE SCALE MEET (May 6 7 8) WESTERN SCALE NATIONALS (July 8-9-10) Middle Tenn. R/C Society Scale Squadron of Southern California Stan Alexander, CD (615) 834-1879 (After 5 pm) Jerry Fleaton, CD (714) 526-6019 3709 Valley Ridge Dr., Nashville, TN 37211 1900 Canyon Dr., Fullerton, CA 92633 MINT JULEP SCALE MEET (May 20-21-22) NEW ENGLAND SCALE CHAMPIONSHIPS (July 9 10) Southern Indiana R/C Modelers James S. Brogna, CD Dale Arvin, CD (812) 283-5719 Jack Buckley, Contast Coordinator (617) 481-0955 3428 Charlestown Pike, Jefferson, IN 47130 65 Devans St., Marlboro, MA 01752 U S. SCALEMASTERS-REDWOOD REGIONAL WESTERN CANADIAN SCALE REGIONAL (July 9 10) (May 21-22) Winnipeg Radio Control Club Willits Airfoillers & Ukiah Prop Busters Gerry Fingler, CD (204) 589-2037 (days) (204) 663-1051 (home) Dave Lovitt, CD (707) 459-9320 287 Rutledge, Cresent, Canada, 43W 9Z7 1571 Poppy Dr., Willits, CA 95490 ALASKA SCALE QUALIFIER (July 22-23-24) Fort Richardson Field TUCSON SCALE MASTERS REGIONAL (May 28 29) Jim Terrell, CD (907) 243-6659 Tucson R/C Club 2432 Loussac Dr., Anchorage, AK 99517 Bill Hempel & Bob Angus (602) 747-3792 7025 East 21st St., Tucson, AZ 85710 ROYAL CANADIAN SCALE AIR FORCE (July 29-30-31) Bill Gillespie, CD (403) 466-6713 GEORGE W. MEYERS MEMORIAL (June 4 5) 9316 - 85th St., Edmonton Alberta, Canada T63-3C8 Air Force Academy, North Auxiliary Field Ivan Munninghoff, CD (303) 683-3218 Work (303) 599-1140 SCALE FLYERS OF MINNESOTA CHAMPIONSHIPS 7815 Mallard Drive, Falcon, CO 80831 (August 6-7) Minnesota Valley R/C. Club EGYPTIAN R/C CHAMPIONSHIP (June 11-12) Bill Cowette, CD (612) 537-6027 Sky Squires R/C Club 4075 Jersey Ave. No., Minneapolis, MN 55427 Lynn Elston, CD (618) 985-4177 R-3 Box 153, Carterville, IL 92918 SPARC’S SCALE MASTERS (Aug. 20-21) MEL KA'i'L (215)676-7618 SOUTHEASTERN REGIONAL (June 11-12) 9200 Bustleton, Apt. Cabot 805, Philadelphia, PA 19115 Bill McCallie, CD (813) 932-0622 10501 Sago, Tampa, FL 33612 HEART OF AMERICA SCALE REGIONALS (Aug 20 21) Kansas City R/C Club NORTHWEST SCALE MASTERS (June 17-18-19) Charlie Guinn, CD Day (816) 474-1141 (816)753-8181 Paul W. Parks, CD (208) 263-2045 258 W. 3rd St., Kansas City, MO 64105 4200 Woodland Drive, Sandpointe, Idaho 83864 CONFEDERATE AIR FORCE MASTERS QUALIFIERS ************************ (June 25-26) SCALE MASTERS CHAIRMAN Buddy Irwin, CD Ed Perez (214) 223-7838 HARRIS LEE 922 Sundown Lane, De Sota, TX 75115 33662 Discovery Drive, Dana Point, CA 92629 - (714) 493-8083 ******************************** Support the SCALE MASTERS CHAMPIONSHIPS by using our sponsors products It is now time to glue the constant chord wing sections to the tapered wing panels. Using the balsa trailing edge as a straight edge, line up the trailing edge of the ta Gemini M.T.S. pered section with the trailing edge of the (A SUPERIOR MULTIPLE TASK SAILPLANE) constant chord section. They should mate. Satisfied that they do mate, lay down a Standard Class R/C sailplane for sport, F3B. and AM A contests piece of waxed paper so the wing panels won't stick to the building board and mix Specifications: some five-minute epoxy and spread it over W in g sp a n 1 0 0 in. COMPLETE KIT WITH the root section of the tapered wing. Now W ing area 930 sq. in. PRECISION CUT PARTS, join the tapered section to the constant Flying weigh t 44 or. ALL HARDWARE, AND Wing loading 6 8 or. /sq. ft FULL-SIZE PLANS chord section using the balsa trailing edge Wing section MB-253515 to align the trailing edges of both panels. (15% semi-symmetrical) $ 9 9 ?§ Failure to do this will result in misalign Max. ballast 4 lbs. ment. Repeat this operation for the other two wing panels. It is now time to glue the balsa trailing Pierce Aero Co. 9626 Jellico Avenue, Northridge, CA 91325 Phone (818) 349-4758 edge to each of the two wing panels. Spread white glue on the trailing edge of the foam wings and line up the balsa trailing edge elevator is left rudder. The right stabilizer, if with the contour of the wing. Use pins to made vertical, is in the up position; its ele hold the balsa trailing edge in place. Repeat vator, which is also left rudder. For a right this for the other wing panel. turn, the elevator positions are reversed. A Next, it is time to cut the sweep angle of vee-tail model is not the most efficient way the balsa trailing edge at the root of both to turn a model because when we are ask wing panels using a razor saw. Also square ing the model to turn we are also feeding in off the wing tips by cutting off the balsa trail up and down elevator at the same time. To ing edge that extends beyond the wing tip. see this, put the left and right stabilizers in The dihedral of the wing is two inches for the horizontal position. For a left turn, the each wing panel. The two inches is from left stabilizer's elevator is in the down posi the building board to the bottom surface of tion while the right stabilizer's elevator is in the wingtip. Follow the instruction sheet in the up position. Since a vee-tail is neither cluded with each foam wing. Using five- horizontal or vertical, but in between, it minute epoxy, glue the two wing panels to BUILD YOUR does both. That is, turn and up-down at the gether. Now cut off the pointed tip at the same time. W hen both elevators go up H center of the wing. Refer to the plans. Sand OWN ROCKET what they are doing, in reality, is feeding in the pointed tip area that was cut off round left-right turn plus up. so it blends in with the contour of the lead MOTORS! (Suggestion: Don't try to figure it out; just ing edge of the wing. This completes the WE CAN SHOW YOU HOW! believe it and go flying! wen) construction of the wing. | THE VEE-TAIL FLYING Cut out the two stabilizer sections from Always fly on calm days, if you don't •40 POUNDS 1/8-inch balsa. Hinge the stab sections chances are you will lose the model. Make sure that the surfaces are going in the right THRUST! using nylon reinforcing tape. Next, lay A down a piece of wax paper and place one direction. This is especially true if your ra • 50C EACH! stab section on it. Mix up some five-minute dio has servo reverse. The model must be hand-launched. Run into the breeze and epoxy and spread it on the other stab. Now, • With a rock tumbler and some simple band ic p Is throw the model straight and level. · we II show you bow to build YOUR OWN locket using the dihedral gauge let the second stab engines in your own garage or workshop tor 1 5 to rest on it and form the ΠΟ-degree angle 1/tO the cost ot the commercially marketed motors with the stab resting on the board. Refer to • INTERESTED? Just send us S2 00 and we II mail you Hannan...... Continued from page 51 our brochure along with a WORKING SAMPLE ot an plans for this operation. electric igniter that YOU CAN MAKE YOURSELF trom FINISH is inclined five degrees relative to the materials you II tind around the house fuselage center line. It conforms to the TELL YOUR FRIENDS ABOUT US' Were the 00 IT You may finish the model any way you YOURSELF ROCKET people like, but remember, keep it light. I finished AM A rules in having 164 square inches of my model by giving all balsa surfaces two rotor area relative to the 160 square inches Write to Department m b 9 The Teletlite Corporation 11620 Kitching SL Sunnymead. CA 92388 coats of clear dope. I sanded between coats of the fixed gull-wing. with #300 wet or dry sandpaper. Next, I According to George, he had miserable used Pactra's Formula-U black poly luck with the usual top-mounted rotor, urethane paint. O nly one coat is necessary. however, putting it under the fuselage was the prewar Japanese silk-and-wire models, Finally, I trimmed the model with red, "like turning on a light." The model, con which were marketed at low cost in "five- orange, and yellow paint. structed during 1977 as a P-30, has its rotor and-dime" stores. For a long time, we had RADIO INSTALLATION mounted at the center of gravity, and it im assumed that there were only a few differ Du-Bro and other manufacturers make parts a stabilizing effect. W hen the model ent types manufactured; however, it now mixing units suitable for this model, follow tries to stall, it just mushes for a few feet, appears that they were made in many de directions supplied with these units. For then goes on flying. Although the rotor is a signs in prodigious quantities by various some of you this might be the first vee-tail poor aerodynamic device, the model flies companies. Thanks to Frank Nekimkin and plane you have encountered, so I will more smoothly with the rotor on than off. John Brown, we are able to present illustra briefly describe how the vee-tail works. Having retired recently, George has had tions extracted from old Japanese catalogs. With the plane in front of you and you at time to reflect on his hobby, and opines: The selections are fairly typical; however, the rear of the plane, to make a left turn the "Models and kissing girls are a lot alike in other more complex variations were also left stabilizer must have the elevator down that you don't have to be good at it to have a manufactured, including some with fully while the right stabilizer must have its ele lot of fun." enclosed fuselages and even some or- vator up. If this doesn't make much sense, THOSE SILK-AND-WIRE MODELS AGAIN nithopters. We intend to make some trans visualize the left stabilizer in the vertical Over the years we have received numer lations of the catalogs' written information position. It now becomes clear that down ous letters from modelers fondly recalling and likely may have more to say about them SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 85 yourself." DO THEY? Don De Loach, of Texas, recently visited Torrey Pines near San Diego, where hang GNOME gliders share air space with R/C sailplanes. The "Hi-Performance Compact” Don struck up a conversation with one of RADIO CONTROL SAILPLANE the fellows and mentioned that his main in terest was in free flight models, to which the 60" Wing Span incredulous glider-guider remarked: 375"'Wing Area 'They still do free flight?" YES, THEY DO! 12to 15oz. / 2 ch R/C Flying Models magazine editor Robin Optomized Eppler 205 Airfoil Hunt reports that their free flight model plans continue to sell in greater quantities S 34.95 Hand Launch» «Slope» » High Start/W inch than all of their radio control and control line model plans combined! ΤΤΕΒ At your Dealer or COMIC BOOK THREE-VIEW add $2.00 per ordero r d e rJ m sm ss m m asL s m s m ? for UPS. Ca. Res " Modeler Jim Longstreth, of Portland, Ore P.O. Box <9 MIDWAY CITY, CA 92655 {7141 B95-65G9 add 6# for Ta x gon, has recently created plans and instruc tions for building a balsa "solid model" of comic book hero A irb o y’s "Birdie," a bat 48-PG. CATALOG OF like, jet-powered ornithopter fantasy air craft. Appearing in the May 1988 issue of Airboy, the drawings are presented in simu HARD-TO-FIND lated blueprint form. Longstreth and Model Builder cover artist MODELER S TOOLS Bob Benjamin recently joined forces with FROM “The Small Tool Frank Macy, of American Junior Aircraft Company, to give a four-hour model aircraft M ic ro -M a rk Specialists’; presentation to school children in Camas, SEND FOR YOUR COPY TODAY! b o n u s OFFER Washington. Busy people! OVER 1000 TOOLS S ACCESSORIES1 Brand Names HOW 'S THAT AGAIN? ... Unusual Items ... Exclusive Products — many at savings of up to 40% . all designed to make your job According to a local television report, easier, more enjoyable lor more professional results! visiting Soviet aviators were offered a tube of sun-screen lotion during the San Diego NAM E______TO ORDER : Send $1.00 with this coupon air show. W hen one asked, "W hat is this (Of with your name and address) to: ADDRESS_ for?" The unthinking reply was, 'To keep Micro-Mark *340-577 Snyder Ave. ^Berkeley Heights. NJ 07922. CITY. -STATE you from turning red." FLEMALLE '88 The 12th annual indoor model contest of turn yoir printer Into an airfoil plotter with. Flemalle, Belgium, will be conducted dur ing August 26 through 28. Events will in FOILED AGAIN!! clude Microfilm, EZB, Micro 35 Paper, Saint MODELS Formule, and, of course, Peanut and F-84 10 Model Kits Pistachio scale. A special category will be F-86 for any Peanut or Pistachio model of an S14.95 • PLOT AIRFOILS IN ANY CHORD TO 24 INCHES* F-100 • MODIFY THICKNESS. CAMBER. TRAILING EDGE Alfred Renard design. Note that Walt F-104 • PLOT SKIN THICKNESS FOR SHEETED WINGS Mooney’s plans for a Renard R-17 appeared Mig 15 and 5 more • ENTER DATA EASILY WITH BUILT-IN EDITOR in the September/October 1974 M o d e l all 1/72 scale • EASY TO USE. MENU-DRIVEN OPERATION • INCLUDES AN 18-PAGE ILLUSTRATED MANUAL Builder. • IBM varalon only Proxy entries are always welcome, and more details are available by sending three e Q Q Q C CA riiM M li iO a .3 3 add ·% I·* International Reply Coupons (available Over···· order· bank draft for US ISO Send $14 95 plus $3.50 shipping & handling Require· IBM - com patible or from most post offices) to: F. L. Van Appla-compattbl· computer Hauwaert, Grand Place, 1-B 52, B-4110, io Aerodyne Industries and dol-matrli printer. Pi···· specify computer and Flemalle, Belgium. . . .Airplane offer... printer typa when ordering. ARCHIVE ACCUMULATIONS P.O. Box 2267 Send check or money order to: Orcutt, CA 93455 CYGNET Software Many, if not most, model builders have allow 6-8 weeks delivery . . . sorry... no COD’s 24843 Del Prado #141 Dana Point CA 92629 sizable collections of magazines, books, and plans accumulated over many years. SOME THINGS NEVER CHANCE Although rewarding to own, such materials in a future column. Author/designer )oe Wagner favored us can create problems eventually. What if the FAREWELL MILTON CANIFF with this extract from a Francis A. Collins reference material outgrows the space avail Famed comic strip creator Milton Caniff model article featured in the October 1919 able for it? What if the "archivist" passes has passed away at age 81, according to Woman's Home Companion: away? Disturbing questions to face. But if clippings from Dick Howard, of Lake "There is a great variety of model aer we don't, our survivors must. Havasu, Arizona. Early in his career Caniff oplanes on the market in case you may wish Leo Opdycke, publisher of W W I Aero had authored "Dickie Dare" and "The Cay to buy one ready-made. The cheaper and Skyways, is looking for solutions to Thirties." It was his later productions "Terry models are not efficient; many of them will these problems to be shared with his and the Pirates," 'Male Call," and "Steve scarcely fly at all. If you intend to buy one, readers. If you have constructive ideas, con Canyon" that gained him worldwide recog try to find one which has been made by tact Leo at 15 Crescent Road, Poughkeep nition. His audience of loyal fans included some boy who has a reputation for his sie, New York 12601. many aviation enthusiasts, appreciative not flights, or from a thoroughly reputable Meanwhile, here are a few thoughts to only of his sensuously portrayed girls, such model supply house. . . .You will, however, consider: Surviving relatives of deceased as "Burma," "Lace," and the "Dragon Lady," feel a much greater satisfaction in flying a collectors may simply dispose of such ma but his authentically drawn aircraft. model aeroplane which you have made terial in the easiest possible way, by throw- 86 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER • Twin Thrustmaster motors for instant acceleration! • Almost ready-to- race, with motors installed and floatation added - you're ready to go almost immediately. • Aerodynamic design and brilliant trim for fast speeds and fast looks. A new era in electric boating. Getting the electric-power advantage has meant that R/C mariners had to take some slow boats. You want it fast? You rebuild it. Mates, model boating has finally entered the 21 st century. Prac tically shooting from its box like a bullet, the new Great Planes Wildcat finally lets you have your cake and eat it, too: advanced engineering has combined high-speed performance with the convenience of electric power for a Cat that's truly in a fast-moving league all by itself. Without modification, the Wildcat is a rocket on the water. No other Nearly ready to race. out-of-the-box electric twin can even touch the level of performance Great Planes has achieved with its design. Twin high-torque Thrustmaster The Wildcat is seaworthy the minute you have it in your hands. The 550 electric motors easily turn the custom high-pitch props for instant space-age ABS hull is prejoined to the deck, twin motors are already acceleration, and the stainless-steel drive shafts maintain peak power installed, floatation added, and what little is left for you to do (such as delivery. Twin rudders and trim tabs let you make the most of the installing the rugged speed control) is made so easy by the photo Wildcat's speed. You can even make 180 ° turns in a 4 ' diam eter.. .at illustrated instructions that virtually anyone can do it. full throttle! You're the captain on the bridge! You may be surprised at how quickly and easily you can commandeer your own blazing electric twin - not only because the Wildcat is effortless to build and race, but because you can afford it, and need purchase nothing more to soup it up. Brilliant decals are included for a first-class finish. All you need is a 2-channel radio, charger, and two 6-cell battery packs (for even hotter performance, use 7-cell packs!). Take control of the wildest ARF twin ever made, and be sure to warn the faint of heart: all ashore that's going ashore! The Wildcat is rocketing out of port! Send for your FREE copy of Great Planet Model Manufacturing Catalog today: P.O. Box 721, Urbana, Illinois 61801 e 1988. Hobbkro. Inc. reference material; share it with friends via photocopies, or possibly outright gifts. Think of the satisfaction to be gained in giv ing it to someone who will appreciate it GASP!! and employ it constructively. After all, someone will eventually dispose of it any PUT SOME PANTS how, why not you, while you can enjoy the gratitude? ON THAT AIRPLANE! SIGN-OFF Modeler/author Larry Kruse was kind ACE Wheel Pants that is! enough to send us some silk thread from Kansas when we were unable to locate any locally. Silk thread is ideal for pioneer ^ ^ model rigging, since it is free of unsightly "fuzz," may be tautened by water-shrinking, and is exceedingly strong. W hen the package arrived, we were amused to read the accompanying note: "I'm not going to be so tacky as to suggest Richard Thompson that the enclosed ought to 'sew it up' for switched to your future projects, or even that your re quest 'had me in stitches.' O f course, on the Micafilm because other hand, you ought now be able to main tain the 'thread of whimsy' that is so much a He loves Old Timers, and Micafilm part of your writing, almost indefinitely." · had the look of a tissue and dope finish—perfect for his “Scram”. Electronics.... Continued from page 16 Although Micafilm is V2 the weight audio, and lots of "high tech" entertain of regular films, its “mica” fibres ment electronics. give it tear resistance that’s 7 In the Black Hawk, without a receiver be times greater. ing part of the control system, just how is a radio signal going to foul up the works? I can't tell you exactly, except that a strong enough RF signal will often be rectified AFTER WHEEL PANTS! COVERITE within a non-receiving circuit. The results are an unwanted uncontrolled DC voltage 420 Babylon Road, Horsham, PA 19044 USA These wheel pants are a quick and easy way within the circuit that changes everything; to really dress up your favorite airplane. Made modifying the operation in some cases and from rugged .060' ABS plastic, they go together killing it in others. The cure is simple if you fast and paint up beautifully with any dope, AT LAST... can find where within a piece of equipment enamel, or epoxy. Molded into the pant is a flat this phenomena is taking place, but finding A Free Flight Model area to simplify mounting to the landing gear. where can often be imposs'ble. The only Retrieval System that A perfect mate to Cap’n Eddy's Sport Squadron cure then is complete shielding, even in works . .. EVERY TIME. V— series of plane kits. Four sizes cover most cluding the wires, and extensive use of requirements. Packaged as a pair. An ultra light weight, long range bypass capacitors and RF chokes. miniature transmitter combined with a I know that few, if any, of you are going to highly sensitive receiver and directional be flying around one of these Radio Free Wheel Dia. Cat.# Length Width antenna will quickly help you track and Furope antenna farms, and you are asking: locate your plane. 60K35 2 1 /2 * 6 3/4* 2 * What's the point? Well, only to try to help 60K36 2 3/4* 7 7/8* 2 1 /8 * NEVER LOSE ANOTHER MODEL! you understand that radio interference can 60K37 3 1/2' 8 7/8* 2 1 /2 * Send SASE For Brochure come from completely unexpected sources, 60K38 4* 9 1/4* 2 7/8* and, in our case, from usually never to be 60K35...... $6.75 Jim Walston identified sources. The important thing to 60K36...... $7.95 Retrieval Systems believe and to remember is that interfer 60K37...... $9.75 ’ 725 Cooper Lake Rd. S.E ence does not have to come from another 60K38...... $9.95 ' i f \ Smyrna. GA 30080 radio control transmitter right at your field. ' ' N 404/434-4905 It can come from hundreds and even thou sands of miles away. Remember too that ing it out. Others may, instead, try to con "our" frequencies are not exclusively ours. vert it into ready cash, often undervaluing If you do enough flying, the chances are (or overvaluing) it for lack of knowledge. At that RFI is going to get you, which is not a the very least, perhaps you should tell your nice thought, but is a risk we all take. spouse the worth of your collection? ELECTRONIC SPEED CONTROLS Also consider that some aviation This topic always seems to be a popular museums will accept donations of such subject here in the pages of EC. In recent items, possibly with tax advantages, or may months, there was one bit of related infor even be prepared to purchase especially mation which I was not able to bring you choice volumes. In such cases you should about ESCs: a source of MOSFETs in small still have access to your items. Discuss this quantities. I did mention this before, and possibility with the curator in advance, some of you were kind enough to write in Complete Catalog $2.00. If ordered however, as some museums are just as short with the names and addresses of quantity direct add $2.00 P&H. 116 W. 19th St., of space as you are. suppliers, for which I thank you. And all this P.O.Box 511D8, Higginsville MO 64037 A final idea: Try reducing the scope of time, the source has been right under my (816) 584-7121 your collection. Be realistic about what you nose, so to speak, and in my hands often. may use and what you won't. Don't hoard Ace R/C to the rescue! I’ve mentioned be- 88 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER AKISTOCRAFT/FOLK'S MODEL CRAFT HOBBIES: State-Of-The-Art Products at Sensible Prices! PrtCU U tfC t tO ClIMtyO ARF CESSNA 172 PIPER J-S CUB SCALE A.R.F. - ALMOST READY TO FLY! PIPER CHEROKEE A.R.F. First Scale tapered wing in an ARF. 20 30 s in ail wood A.R.F. Parted choice lor the novice, Scale model, sturdy construction. combining beauty, stability am) reasonable pricing. Wingspan 55" .25 W ingspan 51" ARI0162 $109.95 Scale model. Painted and covered, sturdy ARI0160 $109.95 construction,ready tor radio installation C essna 172 .40 W ingspan 63" Cherokee .40 W ingspan 55" 06 $109.95 ARI0161 $129.95 ARI0163 $129.95 IMPROVED: CHALLENGER 720 7 Chuael FMI 4 CHANNEL τ DIGITAL PROPORTIONAL RADIO SHARP 45 RTF PATTERN PLANE 2 high torque servos battery bor. re ceiver. switch harness F.C.C. ap proved Dry system Narrow Band. Servo Reversing. Dual Rate Miring AM Rejection and 3rd order modulation 72 MGHZ ARI4000 reduction Metal case. Open S77.95 Gimbals New 72 frequencies. 3 Servos ARI0720 w/Nicads and Charger 9 0 % R e a d y to fly. Fully covered ARI0720+ $179.95 and painted. 59" Wingspan HIGH TORQUE INDIRECT DRIVE SERVO MINI SERVO MINI RECEIVER 36 in/oz torque rating, Built-in BEC system reduces weight, male plug suitable for all but heaviest uses. on board for solid connection. Dim: 1.33" x 0.55" x 1.26" ; 0.77 oz. 42 inAu torque water resistant Specs: center- Dim: 1.89"x1.14" deadband 010 ms. 36 Sire 1V,” long. >/," x0.75";0.77 oz. " high, weight ty r or ARI032131 $29.95 per servo 2 Ch Rcvr ARI03402 $11.95 ARI032130 $22.95 ^w /New Futaba Type Connector ARI03402NF $12.95 .25 R/C AIRPLANE GAS ENGINE w/Muffler A S R/C AIRPLANE GAS ENGINE H/MaTHf MERLIN 8 CHANNEL PCM FOLDING PROP .28 R/C HELICOPTER GAS ENGINE w/Muftler RADIO FOR ELECTRIC PLANES RI0152 $68.75 ARI0150 $62.50 ■ JR . With 3-1 Ratio. ARI0154 $68.75 ARI0600 $12.95 .21 R/C CAR GAS ENGINE w/Muffler ARI0153 $89.95 w ith Failsafe. Incl. 1 servo. ------28 R/C AIRPLANE GAS ENGINE w/Muffler. — ARIPOW86100 $599.95 LIL· SQUIRT DELUXE POCKET-SIZE PEAK DETECTION CHARGER ENGINE TEST FEATHER FLITE ELECTRIC FUEL PUMP STAND AIRPLANE TIRES F o r b ench testing of g a s 1 3/4" ARI4600 $3.95 engines up to .40 (3) 2 " ARI4601 $3.95 Advarced circuitry, sin (3) 2 1/4" AR14602 $3.95 gle button operation, \J safety auto shutotl dr (3 )2 1/2" ARI4603 $3.95 cult. For 7.2 - M v Nicad (3) 2 3/4" ARI4604 $3.95 Fill & empty w/out priming. Fo Pacta. Pocket she 4'A" GLOW FUELS. Uses6vor12v long i % " high ι 2H" power panels, AA Batteries ARI2Q81 £12.35______ARI0315 $39.95 ARI0400 $6.25 To O rder. . . Call TOLL-FREE I-800-2 25-POLK. We accept Visa. MasterCard and American Express. Include card number and expiration mtulrl craft date with order. Or send check or money order to: Aristo-Craft/Folk's Model Craft Hob H o b h i v s bies. Koom 74 . 346 Bergen Ave., Jersey City. NJ 07304. NJ and N Y residents please in clude state sales tax. Please allow 2-3 weeks for IJPS insured delivery. INDOOR MODEL SUPPLY ■ applications are subject to ESD. Here we go ENDURANCE RUBBER MODELS again with more of those abbreviations; huh? ESD, Electro Static Damage, is a valid 2 C O P T O R S THE ' EASY B e o F i y m acronym in the electronics industry, and in this case is a gremlin that can completely 12" Span | S5.95 ruin some types of components. MOSFETs S6.50 I f » * come in special antistatic packaging, re min you 2 Y a rd B ird s THE SLOWPOKE 16" Span Plastic i quire careful handling, and must be sol dered with static- and spike-free soldering m t a h 1J a s irons. As you can see, they are costly, take | Weight 2 Pennys S5.95 __ __ Λ Ithe necessary precautions when working Plastic Prop ^ * * * * with them. 3 Parlor Planes The Novice Penny Plane i m i s E i Fortunately, once they are mounted onto a circuit board, they become safe, and, ex cept for soldering, the item can be treated ·*»*·» as any other circuit. That is with one excep » Tr S8.50 10” Span tion: electronic speed controls will some M g jg g g g g / 5 F f ? NEW TOP FLYING MODELS times be mysteriously triggered into opera FOR CONTEST & SPORT IN AND OUTDOORS tion, even with the companion receiver M l···!· IUIIIMHKIMNIIII UMUIHMI 1 If II IN I II 20" D A P H N E E A . S8.50 being off, as long as the drive battery is con • I <*H · φ Drilled N ose Bl nected. I can't explain the reason why this is i p POWiB UTt VW STMT (% Formed L. Gear so, and neither could Bob Novak, who has AAA Light Sheet AAA Strip Wood probably designed more successful ESCs The New TRC Impulse II with features Japanese Tissue Ithan anyone else around. The problem has no other field charger can match. Hardware & Prop not been reported to me in R/C cars, only in • Charges glow plug cells, on board ignitition 22" KORDA EMBRYO 20" EMBRYO SPORT packs, anything from 1 to 12 cells plus 12V airplanes in which the receiver is powered Lead Add Batterieslll from a separate battery and not from the • TRCs Voltage Acceleration charge detec Ivoltage regulator within the speed control. tor allows you to salely fast change NiCad Maybe this is a coincidence, or an actual cells that were not designed for fast charg factor. W hat makes it difficult to pin down ing. the cause is that the exact conditions are im • Automatic Pulse mode tor slow charging. 13" SCALE AIRCRAFT KITS OUTSTANDING DETAILS. 3-VIEWS & HISTORY possible to duplicate so as to conduct the A E R O N C A K 1937 Inecessary tests. • 10 minute charge time for 500 MA packs I A L C O S P O R T 1929 W A T E R M A N R A C E R 1921 • Comes complete with cigarette lighter plug ZIPPY SPORT A.R.V. HEATH PARASOL 1928 The number of such reports are few, but and two output plugs. ea. S8.25 are similar in that they involve an airplane 272 pgs RON WILLIAMS BOOK ON put away with the drive battery still con • One year warranty on all parts and labor. 300 illust INDOOR MODEL AIRPLANES $15.95 INDOOR BALSA PACK $8.25 P-NUT PACK $8.25 Inected. All of a sudden, the motor is run J A P A N E S E T IS S U E 10 Ige 5 col roll $6.95 ning and, as you might expect, damage of CONDENSER PAPER 2/$3.25 MICROLITE $3.25 RUBBER LUBE $1.95 BALSA CEMENT $1.95 various sorts occurred. There are other sim THRUST BEARINGS. Mini Dual or Dual $1.00 R U B B E R 025 to 090. 005 inc. + 1/8 & 3/16 $2.65 ilarities; these things always seem to hap T r c 6:1 WINDER $5.95 16:1 MARK 1 $12.95 Ipen indoors, and that may be a clue. M O S 0-10972 10th Ave. N.W. WE STOCK PECK. R/N. & BROWN A-23 CO3 FETs have different drive requirements than Grand Rapids, Ml 49504 ADD 10% POSTAGE-MINIMUM POSTAGE $2.00 do bipolar transistors, which require a low NEW 18-PAGE ILLUST CATALOG $2.00 voltage high current on the base in order to (616) 453-8527 BOX 5311, SALEM, OR 97304 Istart conducting. A MOSFET, however, re Indude $78.00 plus $3.00 for postage and hand quires only the application of a voltage, ling tor each last charger ordered. Additional out put plugs available lor $1.75 each. Michigan resi with very little actual current flow. It may be dents add 4 % sales tax. that in some cases there is enough of an □ C her* enclosed □ Ves electrical field created by the home alter HI-PERFORMANCE nating current, static electricity, or both to □ COD □ Mastercard in some manner build up enough potential A o d . * Expiree FOLD NG PROPS on the printed circuit board to trigger the MOSFETs. Name | Send SSAE lor catalog sheet on our complete line | As i have said in the case of black wire Add rees K and W ENTERPRISES, INC. 7824 Lexingt·* At».. Philadelphia. PA 19152 corrosion, it would be satisfying to know City State Zip the causes of some of these weird happen ings. But since they sometimes elude us, and BUZ-71s. The former is stock number the most important thing then is to be aware SS070, at $8.50, and the latter is SS071A, at of them and take the necessary precautions. $2.25. As I have said here before, if you are In the case of wild electric airplanes, the serious about doing-it-yourself, you've got cure is obvious: disconnect the battery ex to have an Ace R/C catalog, available for a cept when you are ready to fly, and, by all mere $2.00. You see, even I still find new means, disconnect it after a day's flying. and important things in it. It may be that this runaway motor phe Another repeat, for you latecomers: The nomena is larger than I know. I have been International Rectifier IRFZ40, another test-flying a new electric airplane, the popular ESC MOSFET, is available in small "Professor" manufactured by Hirobo in fore that it stocks and sells a great variety of quantities from Digi-Key Corporation, P. O. japan and to be distributed here in the US electronic components in any number, but Box 677, Thief River Falls, Minnesota 56701- by Futaba. Great little machine, and I will always assumed that they were only the 0677. The latest available price is $6.00. tell you all about it once my testing is com parts that are used in its proprietary equip This M OSFET is efficient and holds up well plete. Anyway, I notice that in more than ment, and I didn't know of any of it that used in drive service, but does not do as well in one place in the manual, you are instructed MOSFETs. I still don't, for that matter, but in brake service, for which I recommend the to unplug the nickel-cadmium drive making up an order recently, as I was going BUZ-11. battery. down the list, there big as life were BUZ-11s Remember that these MOSFETs in ESC TALKING ABOUT BLACK WIRE 90 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER The beauty at rest M RC-Tam iya’s Black foot Check out the lifelike scale and detail on the authentic undercarriage. Examine the carefully crafted chrome grille, the Tail isn't all headlights, the doorlocks. From top to Tamiya enters the The Blackfoot's hefty ground clearance bottom, few R/C reproductions rival it. all-terrain crusher means it'll climb most any obstacle. And Tamiya's high output, high torque Don't pussyfoot...get the Blackfoot category... and RS-540S engine pumps plenty of ground Add excitement to your hobby, and take everything that thumping power. While the Blackfoot's command of the Blackfoot today. It’s a heavy duty, coil-dampened suspension — beauty and a beast...prowling in a hobby came before doesn't double wishbone in front, trailing arm in shop near you. the rear — lets it effortlessly cut and dart come close. with a nimbleness that belies its size. ® Setting the standards to power Other creature features MRC& m the industry Tamiya has engineered the Blackfoot with Model Rectifier Corporation Churning mud and spitting rocks like a attention to quality and durability. Like a 2500 Woodbridge Avenue malicious monster gone mad. the sealed gear box to protect the drive train Edison. New Jersey 08817 Blackfoot is the nastiest, most powerful gears from debris and moisture, differen brute in the bog. He's also the most tial gears for tight cornering stability and beautifully detailed R/C pickup, and the positive control on any type of terrain. leader of the new generation of great And its one-source power from its BEC looking, hot performing crusher pickups. (Battery Eliminator Circuitry) gives you maximum space in the chassis with A deranged Ranger lower weight. For overall best This 1/10 scale Ford Ranger is all performance we suggest you business and no compromise. Perched buy genuine, matched > on its mammoth wheels and turf chom MRC-Tamiya ni-cads j M r J T pin' tires that are nearly a full 5" high, (not included). the Blackfoot towers above the ground like a Goliath It stands high enough to scale sharp inclines and stomp the stumps and bumps that strand λ lesser pickups. Single piece hubs allow ^ quick assembly. low weight and maximum t ruggedness. Anyway, according to that, the Black Wire Box 1063 Lorain, Ohio 44055 Death starts with the negative electrode of m l V “ V iW Phone (216) 282-8354 the cell, the outer shell, seeming to focus at P E A N U T S C A L E Piper Cub the wire connection and creeping up the Piper Vagabond wire. Many of the reports that came in told Piper Cub P o r t a - S h a d e T H E NAME T O REX EMBER how unplated wire was more susceptible to FOR SUN SHADE AMD R AIN S H ELTER . Stinson 125 Outdoor kits each . . $7.50 this corrosion, which begins to make sense CONVENIENT SIZES - β’χΙΟ*. 9*x10* ft 9*xl8· EXPANDABLE - Two or three can be joined. Light Indoor as it would be more affected than plated ROOMY - No center pole and nearly 7' ta ll. kits each. $7.95 wire or the outside of the cell which is also QUICK. ERECTING - 5 minutes by one person. ADJUSTABLE - Level, tilted or vertical. plated. The solder connection, being COOL - Opaque, heat reflecting canopy. STRONG - Riveted comers, no grommets. OUTDOOR PEANUT mostly lead, also falls into this category. WIND RESISTANT - Tested to 40 MPH. Super Scale $7.50 Works for me. Hornet P-30 . $13.95 If indeed this is the cause, the cure is not to let your batteries get too far discharged SPORT SCALE while idle. We've always recommended PC-6 Porter periodic charging during winter, for exam Q Taylor Craft ple; now it seems important for one more Stinson Voyager reason. Rubber or CO* Power Last of all, should it turn out that this is not PC-6 Porter Kits each... $8.50 the main or only reason, it is important to SPORT MODELS remember that the wire connected to the Hornet Embryo An Embryo Model negative terminal of Ni-Cd batteries does at with 18" Span designed to win! times corrode enough to stop the equip For beginners and ment from operating, and periodic checks experts... $8.50 for it is a good idea. HARD ΤΟ-FIND ITEMS Well, as always, Ni-Cds and charging has to be mentioned every month. At least I Early Bird Tissue for Antique A ircraft...... $6.96 True Olds Japanese Tissue, 10 in 3 colors...... $6.96 didn't hit you with anymore of those nasty Japanese Tissue, 12 in ecokxs ...... $3.96 formulas. Now go fly! · Microlite S ilve r...... $3.96 Microfilm - $4.96 Glue - $1.76 Solvent - $1.60 Conderaer Paper. 3 sh e ets...... $4.60 A R F s ...... Continued from page 26 Plan Service over 17 Scale, Sport Scale & Peanut Scale Rubber Strip .020 thru .0 8 5 ...... each $1.96 one of us who enjoys building. I just fin 3/32 thru 6/32...... each $Z60 ished a conventional balsa trainer in six Winder 6:1 . . $6.96 Mark 1 1 6 1 ... $12.96 days! I expect to continue to average one a Complete Une of Brown CO* Motors month in my never-ending search for Belie Wood Outdoor 6 Indoor Sheets 6 Strips trainers that I can honestly recommend. Add 1 0 % Postage — Minimum Postage $1.60 That effort has become practically an all- C O M PLETE C A T A L O G $1.60 absorbing pursuit thanks to the regretfully large number of people in this hobby who seemingly would not know an easy-to-fly NEW from trainer if they sat on one (or else really don't care about whether or not a beginner solos - ' m easily or whether or not he becomes dis PORTA-SHADE and ΓΚΛK-J-QK* EYE K IT For R/V's equipped with a canopy track. Spinner tri-ptop sets for couraged and drops out). m s "Art, I'm sorry to have to be so vehement, Sportsman Model PFR 4-60 $39.95 · $3.00 UPS Rubber PoYiipreaM odels but this has been such an uphill crusade of Economy Model EPFR 4-60 S32.95 · $3.00 UPS mine. I knew that Bob Benjamin, Mitch Pol Dining Model DCFR 4-90 $S2.00 · $3.00 UPS Peickag e c onlaini^oj/sets lo Sportking Model KPFR 6-162 $85 00 · $4 50 UPS ing, and quite a few others were well-aware Add-A-Shade Model AFR 4-60 S29.95 · $3.00 UPS make four, threi'lflSta props. Add-A-Shado Model ADFR 2-90 $42.00 · S3.00 UPS of what I'm trying to do and encouraged it. R/V Trak-Lok-Eye Kit TAA2 $10.00 · $1 50 UPS R/V Trak-Lok-Eye Kit TAA3 S1450 · S’ 50 UPS C ompleteinsmicti ems, "Yes, removable fuel-tank hatches are a Mechanics Tote-Tarp MT-24 $ 9.95 ♦ S I.50 UPS convenience, but the tradeoff (fuel leakage) MastorCard-Vtsa-COD-Checks ...... Dealer Inquiries tbKist b e8*inhere Invited. Free literature on a l1 4M Co. products (prthe means they are a secondary requirement. THE FOUR "M" COMPANY Yes, trike u su ally handles better than tail- 209 S.W. BUCY AVENUE Mauic Flight dragger (unless the tail-dragger's landing BARTLESVILLE.OK 74003 8033 Sunset Blvd Suite gear is set up right), but, again, this is a sec Phone: (918) 336-9445 ondary rather than a prerequisite. I have Los Angeles CA 90046 given you the prerequisites. Now it is up to CORROSION 14.00 you whether or not you are willing to help I've closed the book on the subject of make the naive aware of them. There is a black wire corrosion a couple of times, but dry cells, this self-discharge is less notice God, and there is a hereafter, and I firmly it keeps coming back to life. The subject has able than with Cadnica batteries, which believe that we were put on earth to help actually spread outside the columns of EC, have a large facing electrode area and a one another." I think we can all agree that with some rather strong theories without limited amount of electrolytes, all of which Jim has embarked on a veritable crusade in any factual backing being offered as un are completely sealed. the cause of choosing the proper trainer. disputed facts. Well, I've just recently "The following two factors greatly affect Jim has been running an advertisement received some material from Sanyo Electric the self-discharge of nickel-cadmium bat offering to send his Ease-of-Flying Ratings Company, who I feel safe to say knows more teries while in storage: of R/C Trainers for $1.50 postpaid. As is about nickel-cadmium batteries than all the "1. Instability of inactive materials. Nickel often the case when we become en rest of us. oxide is thermodynamically unstable at its couraged in the pursuit of a single goal, we Sanyo, in speaking of the Storage Charac charged state and self-decomposes gradu sometimes tend to lose sight of the big pic teristics of its "Cadnica" cells, states: ally to generate oxygen gas, which, in turn, ture. W e answered Jim as follows: "Generally speaking, a loss of voltage oxidizes the negative electrode. Thus, the Dear jim: and capacity due to self-discharging during self-discharge proceeds." The second factor Many thanks for your thought-provoking storage is unavoidable. With open-type stated dealt with impurities and is not perti letter in regard to my recent article in M o d el nickel-cadmium batteries or manganese nent to the discussion. Builder. I must admit, however, that you 92 MODEL BUILDER have me at a disadvantage, having been ANY MAY YOU able to read my thoughts on the subject of USE THEM ADOS UP TO trainers without having granted me the CM BETTER privilege of reading your article. I will nev m PERFORMANCE K P ertheless attempt to answer some of the NYROD® THE O RIG IN A L TVitafMV PU SH ROD points you touched on. COMPLETE WITH ALL REQUIRED METAL Last week I trained a young man to fly R/C FITTINGS I IDEALLY SUITED FOR ANY PUSH ROO ACTION in one morning, after a total of one hour RUDOERS. ELEVATORS. AILERONS. THROTTLE HARDWARE INCLUDED: and twelve minutes air time. He was a 0 0 CONTROL. BOATS. SEA PLANES YOUR 1-4* NYROOapler IMAGINATION 1-8* Rod with 2-56 Threaded end ~ ~ *1.79 junior military officer with absolutely no LONG, ASSEMBLED LENGTH CalNYROO modeling experience of any kind, and not 0 > particularly motivated to learn R/C. The air P r o R O D t h e RIGID P U S H RO D plane we used was a full-sized Buzzard TW O COMPLETE SETS WITH ALL REQUIRED I METAL FITTINGS Bombshell with an old Enya .29, swinging a SELECTED PRE DRILLED HARDWOOD RODS HARDWARE INCLUDED: 10/5 prop. During the training period I ASSEMBLES IN MINUTES 2-12* ProROOapters NO GLUING REQUIRED 2-4* NYRODapters $2.59 never once had to take the transmitter from 2-Stotted Couplers 36* LONG. ASSEMBLED LENGTH Cal P-ROO him, and he could land and take off at will by the end of the session. Great! This must MASTEROD T H E Sffelitbfe Cobit P U S H RO D be the ideal trainer; don't you think? Plenty COMPLETE WITH ALL REQUIRED METAL of squares, big undercambered wing, FITTINGS CONTAINS FLEXIBLE CABLE AND TUBING super-light wing loading, and so slow it can HARDWARE INCLUDED: SATISFIES ALL PUSH ROO REQUIREMENTS TO fly backwards in a light breeze! Vi* RADIUS 1 -4* Sectcn Vn Wire 1 -2-56 Threaded Coupler FLEX18LE AND POSITIVE Jim, I think you will readily agree that 1-Stotted Coupler $1.89 36* LONG. ASSEMBLED LENGTH many old timers such as the previously Cal M-ROO mentioned Buzzard, the Super Buccaneer, MASTERODXF T H E firtM CaMp p u s h r o d the Playboy Cabin, Miss American, and the COMPLETE WITH ALL REQUIRED METAL HARDWARE INCLUDED: FITTINGS Quaker, to name a few, would be about as 1 —4* Section W Wire CONTAINS FLEXIBLE CABLE AND TUBING 1 -2-56 Threaded Coupler good as a trainer can get. And if a new stu SATISFIES ALL PUSH ROO REQUIREMENTS TO 1-Brass Coupler dent comes my way who is a veteran 2 " RADIUS FLEXIBLE AND POSITIVE builder, wants to learn R/C, and is w illin g to 36* LONG. ASSEMBLED LENGTH wait weeks or even months to get into the air. I'll send him home to clear his work S u 'P r ' R O D “ t h e 44" FLEXIBLE p u s h r o d 2 COMPLETE SETS WITH ALL REQUIRED bench and get started. THREADED ROOS Now, I hope you will give me credit after MORE *PUSHABIUTY* having been flying R/C for close to 20 years 44* ASSEMBLED LENGTH HARDWARE INCLUDED: SMOOTH SURFACES— NO RIBBING TO 2-8* Rods with 2-56 Threaded end and having trained maybe a hundred stu ACCUMULATE OIL AND DIRT 2-1* Studs with 2-56 Threads $2 29 SATISFIES ALL PUSH ROO REQUIREMENTS dents, some of whom are out there winning DOWN TO A 3 V RADIUS CalS-ROO competitions today. I am no dummy, Jim. If a student prefers to build an airplane, I can come up with at least two trainers that just SU'PR'ROD I I t h e 36" FLEXIBLE p u s h r o d 2 COMPLETE SETS WITH ALL REQUIRED have to be on your preferred list, the M.E.N. THREADED ROOS Trainer and the Sig Kadet Senior. I could MORE -PUSHABJILTY· ^ *— *— probably think about it and come up with a OVER 36* ASSEMBLED LENGTH HARDWARE INCLUDED: SMOOTH SURFACES— NO RIBBING TO ACCU 2-4* NYROOapters lot more, but for now, those two ought to MULATE OIL AND DIRT 2-1* 2-56 Threaded Studs do. And if those two models aren't top-rated SATISFIES ALL PUSH ROO REQUIREMENTS $1.99 DOWN TO A 3V>* RADIUS Cat S-RII in your evaluation list, then I would accuse you of not knowing your subject. I admit A n T e n n a T u b e s EASILY THREADED TUBING that these are the kinds of airplanes I want TW O 38* FLEXIBLE TUBES FOR ANTENNA to teach somebody to fly with. But I happen LEAD OUT to live in the real world, and if you could try $ 1.00 to see the other guy's side, you would real Cat AT ize that building and flying are separate ac tivities. If you want to learn on a store- bought plane, the Headmaster will get the JOINT-POINT job done admirably. So will the Hobby W . *n*. %*. V-*. O R '/4* Shack 40T, which is even bigger, is very gen LIGHTWEIGHT tle to fly, and sells for only $99! So, I am X) Pieces of the ’/»* size - 4 9 grams. willing to compromise to get someone into C U T budding time, no more pinning and split ting thin wing ribs the air and solo him as quickly as possible. D ISTR IBU TE compression and tension loads. I am proud to say that I have over a 95- percent success rate with my students, and NYROD apters NYROD a p t e r s S T U D S a n SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL 'EM MODEL BUILDER SENT YOU! 93 information on his "Efthrebe," a prefabri cated sailplane which is completely cus VINTAGE R-C FLANS tom hand-built. Ed has been a sailplane en thusiast for many years, and he is now offering this model in two wingspans, a 126-inch version which meets F3B compe tition requirements and a 126-inch version which is intended for general sport flying. Solder terminal 9 FT. WING SPAN ON/OFF Controller ALL RIBS 6 FULL FORMERS SHOWN ON PLANS // The wing is designed with the state-of-the- •till available f l h*» Brake for *19.95 PLASTIC ENG.COWLS $ 1 0 -9 0 PR art Quabeck airfoil section, which seems to Ki Lightweight U ox. CLEAR GUN BUSTERS $ 7 .6 0 PR *j Adjustable twitching pouu 2 month money be leading in international competition of ffl Solderle** terminal fo r e«*y hookup back guarantee * large plan sh e e t s — Plans $18.95 late. Wing chord is ten inches, and all-up ON/OFF Controller $24.95 6 f t . WING SPAN MODEL PB Y-5A flying weight is right at 80 ounces. In addi More Power, save weight ENGINE C O W L S $ 7 .5 0 P R . PICDS $14.95 tion, three tail surface configurations are Very high efficiency only 0.06 V lo w at 20 A . Size 2.2x1.3x.63 GUN BUSTERS $ 5.50 PR. ADp $ 3 00 POSTAGE offered, a floating stabilizer, a "T" tail, and a Add $1.00 fo r shipping California resident· add 6% Tax CATALOG-OVER 50 PLANS $1.00 DEALERS WRITE "V " tail. Flaps and/or spoilers are optional, S*nd check or money order to· just state your requirements. The buyer may Co b ·· with HIGH SKY WORLD © WIDE Futab» connector 3929 KANSAS St.»9 order the Efthrebe in just about any stage of other connector· SID MORGAN are alec available SAN DIEGO, CA 92104 completion, but Ed offers a ready-to-fly 13157 ORMOND .BELLEVILLE , MICH.48III u . s .a . model with obechi-skinned foam wings and tail surfaces, and a fiberglass pod-and- boom fuselage. For do-it-yourselfers, the Hobby Horn model can be had in standard kit form with hobby specialties unskinned foam wing and tail cores plus K its from λΦ the standard fiberglass fuselage. O f course, P & W Old Timers & Antiques wing skins and all hardware are supplied Model Service For your Reed Valve Engine with all unfinished versions. As we are deal 1935 Mtss America 84' $71 96 1936 Buccaneer 84* $59.96 • Diamond Zipper ing with a truly custom builder, just about 1937 Dattalre 108·' $75 16 1938 Clipper Mk I 72* $41.56 • Flying Quaker 1938 Kloud King 63* $42 36 1938 Powerhouse 84’ $53 56 • Red Zephyr ,v anything is available. For further informa 1938 Record Broaker 96* $69 56 1938 Trenton Terror 72" $40 76 • Miss Philly tion, contact Ed Cutler Plastics, 1934 1939 Korda Wake 44* $19 16 1939 Mercury 72* $58.36 • Ea g le t 1939 Zipper 54* $53 56 1940 Ranger 46* $3196 • Commadore Comanche St., Oceanside, California 1940 Sailplane 78* $84 76 1940 So Long 50* $30 36 A $422 Ά Α $ β β 9 92056; (619) 726-4971. 1941 Bngidler 56* $40.76 1941 Super Quaker 78* $72.76 1941 Playboy Jr 54* $3116 1941 Playboy Sr 80* $51 16 1941 Brooklyn Dodger 56* S42 36 STAZLIT FUSE ARFS W E W O U LD LIKE TO SEE 10’-$322 15’-$422 2 5 ’ 500 Midway Model Co.: Full Kits It would be quite a challenge to attempt 1936 Flying Quaker 84* $64 76 1938 Powerhouse 50* $29 96 1988 Illustrated Plans Book S2.50 jkV to count the number of ARFs available to us 1937 Long Cabin 78* $47 16 1939 A T Sponsor 50* $29.96 B&D MODELS 1937 Quaker Flash 67* $45 56 1940 8uzzard Bombshell P.0. Box 12518 today, but types of models are getting to be 1937 Air Chief 61* $35 9 6 72*sp»iM $56.96 Reno, Nevada 89510 ' conspicuous by their absence. For example, 1940 N ew Ruier 74* S 7 l 16______50*spanM $35 96 The above kits qualify for Sam events (FF & R/C). and feature it is time we had a World War I style the highest quality machine cut & sanded parts, all sheet & strip biplane. W hen it comes to ARFs, almost wood. wire. & window material. Most plans are the original FF. hut !hc models are easily convertible to 3ch R/C. any kind of bipe is as scarce as hen’s teeth, Sailplanes, Electric Power or Gas Kits but warbird types are totally nonexistent. ■MPWAYJHQPa.TO, ELECTRIC MODEL DESIGN Another category of ARF I would like to see Gnome HLG 60' $24.00 Sky Knight 44' (05 Dl) $24 00 Still chiseling Gnome 2M GlOe> TV $37.96 ElectraGkde II 73' (05 D) $31 00 made available is a multi-engine scale type, Fast Ed However, Ido wish to compliment you on Soaring...... Continued from paeg 36 your efforts to get some sanity into the case, as some ARFs are produced in small choice of a first airplane. Actually, you and I quantities and may be entirely hand-built. Duke). think very much alike on this subject. There Some custom builders concentrate on only Dennis was the only other flier besides are too many unqualified people out there one or two models, while others will accept Joe to have a perfect 3,000-point score at the making poor choices of airplanes for commissions to construct any model the end of three rounds. This forced these two novices, and I do suspect that some of it buyer desires. As this is a small, but active, into a fly-off. The task was selected: five- may be profit-motivated, but I prefer to segment of the ARF industry, we will from minute slot, three tosses count, no flight chalk it up to ignorance and inexperience. time to time present the products of private over two minutes. Joe launched at the start Thanks again for your letter, I found it most custom builders. W e are now in the process of the five-minute slot, but Dennis did not. stimulating. of preparing a future column devoted to Instead, he chose to let Joe point out the lift CUSTOM ARFS such model builders, and those who offer and then piggyback off of him. That was his When we think of today's ARFs, we think this service are invited to contact me so that mistake. Joe maxed twice (you were expect of a highly sophisticated product which is we may include you and your models in our ing less?), and so did Dennis. However, by mass-produced in modern manufacturing forthcoming report. virtue of launching earlier, Joe was able to facilities. However, that is not always the Apropos of this topic, Ed Cutler sends us keep his glass-winged ship up a total of 291 94 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! MODEL BUILDER Uniquely sized Extraordinary no wer 26 Surpass: 70 Surpass: O.S. Surpass Series: Big power in a small package For the Power that Satisfies Quality, Performance and Value If you thought that small four-stroke Looking for some extra kick out of a All of the O.S. Surpass four-stroke engines couldn’t pull their weight, you mid-sized four-stroke? Then the new O.S. engines provide the highest quality and haven’t experienced the new O.S. 26 70 Surpass is the engine for you. Provid performance at a price that yields the Surpass. More than just a pint-sized work ing over 22% more useable horsepower greatest value. From the precision com horse that will pull your small aircraft than the O.S. FS-61 (1.1 horses as 11,000 puter-controlled machining of internal through the maneuvers with ease, the 26 RPM). the new 70 Surpass was designed working parts down to the most critical Surpass is an engineering and modeling and engineered to give you the extra boost carburetor settings, every O.S. Surpass masterpiece. Producing a healthy .41 that you’ve been looking for. Thanks to engine is designed to fire right up. take horsepower at 11,000 RPM and weighing the same technical and design innovations your model to new heights, and keep you in at under ten ounces, the 26 Surpass is a that have made the 91 and 120 Surpass in the air flight after flight, season after high-torque, pint-sized dynamo that puts engines the leaders in four-stroke power, season. Other four-stroke engines might out big-time power. So, if you’re consid the 70 Surpass is your ticket to the superior get your model off the ground, but dollar ering a small scale model but don’t want performance that satisfies. For mid-size for dollar, O.S. Surpass engines give you a to compromise on realism or power, check four-stroke flying, the O.S. 70 Surpass is distinct quality advantage - year after year out the new 26 Surpass. The size is right, destined to become the new standard by after year. Anything less wouldn’t be O.S. the power is plentiful and the quality is O.S. which engine performance is measured. So check out the new leader - the O.S. 70 Surpass. DISTRIBUTED TO LEADING RETAILERS NATIONWIDE EXCLUSIVELY THROUGH ® Pick up vourcopy of the new O.S. catalog at your/avorite hobbv dealer today, or w rite to us at Great P la n e s Distributors a n d * O D E t u nijf Vy O .S. ENGINES w e’ll send it to you free? ® 1988. Hobbko. Inc. m j FEATURING: Construction Articles Product Reviews Radio Control Vfes, start my subscription Peanut Plans 0 to Model Builder! Electric Flight □ New □ Renewal V w Old Timers N a m e ______A d d re s s ______C ity ______S ta te ______Z ip ______□ $25.00 for one year (12 issues). Over $10.00 off newsstand prices. □ $47.00 for two years (24 issues). Over $23.00 off newsstand prices. M/C or Visa if (Add 5%) ______Expiration Date ______Signature ______$38.00 for one year (includes postage), MODEL outside U.S. including Mexico and Canada. For two years (24 issues) send $68.00. ALL PAYMENTS MUST BE IN U.S. FUNDS DRAWN ON A U.S. BANK BUILDER MODEL BUILDER 898 W. 16th St., Newport Beach, CA 92663 WORLD’S MOST COMPLETE MODEL AIRCRAFT PUBLICATION seconds to Dennis's 275. Dennis attributed the pod helps keep the form drag down, looked adequate. The wing area of RO-19 is his hesitation to brain fade after a long, hot and the combination of pod and boom 412 with a 7-inch average chord and finish contest. Can't really say I blame him! helps keep the parasitic (skin friction) drag ing with (my guess) a 3-inch tip chord. All Dick Odle was third behind these two to a minimum. up, the RO-19 weighed 14 ounces fora wing guys at 2993, only lagging by 7 points! His The horizontal stab is 15 percent of the loading of 4.9 ounces. model was the RO-19 (Richard Odle design wing's area, and the vertical stab is 7 per These three guys, Joe Wurts, Dennis #19). This model was perhaps the most cent. The T-tail stab is proven to be the most Brandt, and Dick Odle took home the highly specialized of the bunch and effective configuration because it reduces Model Builder trophies for 1988. However showed the appropriate potential. RO-19 the number of drag-producing intersection good these guys were on this particular day, was the CD's choice for best floater. At one points from the usual four of a mid-fin stab there were many more who "could'a been a point early in the contest I overheard Dick down to just two, and also by acting as an champ" as well. Anyone in the top ten or commenting to his spotter, Jerry Krainock, end plate for the top of the rudder and fin eleven were capable; the competition was that he was impressed by its ability to slow which eliminates half of the induced drag that keen! In fact, the entire bunch was down and thermal, yet really speed up during rudder actuation. Also, T-tails place noticeably more skilled this year than in when urged by down trim. the horizontal stab out of the turbulent past years. RO-19 has some intelligent design fea downwash of the wing. What the heck, all Rounding out the top ten we find that tures that may give it an advantage aerody- of that probably doesn't mean too much; T- John Lupperger finished fourth flying one of namically and structurally. First of all, the tails just look better. his BO DST partial kits which he sells for wing is elevated from the fuselage by means W hen asked if Mike Charles's Ultra HL $19.95 (J.M. Lupperger Plans, 1304 Palm of a one-inch pylon. This in theory provides was the inspiration for RO-19, Dick an Ave., Huntington Beach, California 92648). for a less interrupted flow of air under the swered that he did think it was "cute." A John was 69 points shy of a perfect 3,000- wing. The core of the pylon is light balsa. comparison of the two (see September 1987 point day. Over this balsa is 1/64 ply, and over the ply MB) shows many similarities. Allan Guthmiller (Las Vegas) flying his is fiberglass. Being only one inch high, it is I would assume that to make the wing original design "Nuthin Special" original not very likely to flex or break during the easier to build and cut down on heavy based on previous year's successes finished most energetic tosses. This pylon is firmly joiner materials, the wing of RO-19 is flat fifth. Allan is always the guy who shows up glued inside the pod-shaped fuselage and across the center section with poly tips and with the smallest and lightest planes. "ties everything together." It forms a part of tiplets. The result is a light wing that has Garth Warner flying his third generation the thrust block that keeps the throwing good roll power and stall resistance. The Chicken Sh*$t finished sixth. This year's dowel from ripping out, it holds the fiber airfoil is a homebrew of Dick's based on the plane had a new wing. glass tail boom securely in place, and it pro upper surface of the Quabeck 2.0/12 and a Gary Anderson flew his Scott Whitney vides a location for a threaded anchor self-inflicted lower surface. The result is a Models Paraphrase to seventh. Gary's com block for the wing's hold-down screw. 10-percent thick section with 2.7 percent pany, American Sailplane Designs (2626 The nine-inch fuselage pod forward of mean camber. At one point during the con Coronado Ave, #89, San Diego, California the wing's leading edge holds the radio test, Dick wasn't sure it was quite enough 92154), mail orders these full kits for $29.95 equipment in tandem. The narrowness of mean camber, but watching it fly, it sure with complete hardware. I must say I was 96 MODEL BUILDER impressed by how much better Cary flew this year since he switched to the Paraphrase. JOHN POND Due to a scoring error of approximately 400 points, the rightful eighth place finisher was not recognized as such at the Old Time Plan Service field, and as a result was sent home minus a The largest selection of plans in the world at the most trophy. That flier was the CD himself, Ian reasonable prices. Each list $ 1J Douglas! Ian also flew a Whitney Models Paraphrase. John Bentley (Chandler, Arizona) placed No. 18 OLD TIMER F/F GAS ninth with that fantastic scaled-down Gen No. 18 OLD TIMER RUBBER/TOWLINE tle Lady that we showed you last year. I No. 18 OLD TIMER FLYING SCALE A through guess Goldberg Models either missed the hint I dropped last year about doing a kit of No. 18 OLD TIMER FLYING SCALE L through this model, or (I hope) they are working on New plans prices effective Jan. 1988 to Dec. 1981 one! Unfortunately John had to make tracks P.O.Box 90310 for home before the top-ten photo could be snapped, but I did get a rather nice shot of San Jose, Calif. 95109-3310 the "Micro Lady" passing by overhead. Phone (408) 292-3382 (Tues. or Fri.) Craig Robinson (Portland, Oregon) brought his whole family down from the cool Pacific Northwest to compete in this The Only Way to Fly event. They were rewarded for their pa Fabtronics M ark 3 C.D .I pointless system tience with dad by going to Disneyland the following day. Craig may have broken the four-year running record for longest dis tance travelled that has been held by Frank Green since the beginning. For his efforts he won tenth place and took home the A Nationals Winner ninth place trophy! The “Heinke!” He 100-d Craig is kitting his winning design called 24' Wingspan — Rubber Powered Flying Scale W o rk s Great for M o s t the Sunrise 60. Contact him at 12225 SW $ 1 5 . 9 5 Kit *110 2 and 4 C ycle engines 127th Ave., Tigard, Oregon 97223, for Your old building skills will enjoy the experience Time too Automatic Spark Control now available to Qei yout son learning how A beautiful hit in the Flyline tradition, contest winning flight ability Decals Canopy and for m ost 4 cycle angina·. prices. Briefly, the Sunrise 60 is a reduced- Spmner are included Ouahty balsa, a hit we are proud of span Sunrise 66 which has been cleaning We've got a who*« line of old lev-nie* Complete System (Less Batteries) ...... S69.95 Please send 50* tor our Flyline Catalog house in the Northwest in RCHLG contests Phone: (703) 273-9593 Dealers and Distributors are invited. (add $3 post. & Hand.) for the past two years or more. It features a FLYLINE MODELS, INC. FABTRONICS long tail moment which makes it easy to fly P .Q . 8 0 » 2136. F oirlo x, V lrg ln lo 22031______37 5 /t/e Royale Rd., Galesburg, IL 61401 and the popular E387 HLG airfoil. Last year's number one winner slipped to balsa over the foam. This Fantasia's wings the design features is a model which rolls eleventh place this year. Don Nigg, flying a were just a little on the heavy side, even well, keeps its energy on turns, and even highly modified Flinger (as in it only resem with the foam removed between the false flies inverted in spite of being rather "under bles a Flinger). The nose was lengthened "rib caps." Rod Knight competed with an cambered." Well, that's going to have to do one inch, and the tail was lengthened two. unnamed original that looked promising. It it for this month's report. Next year try to The wing chord was increased one inch was one of the few (only?) models that used make it to the sixth annual l$S HLG Contest. also, and then the airfoil was changed to the Jack Chambers airfoils. The models main It is sure to be a winner! Goettengen 795. The results sure looked panels were JC-15, and the tip panels transi PLEASE CHECK THAT MAILING LIST good to me! Don and his timer/helper tioned from this to the JC-M section (the lat Model Builder's R/C Soaring columnist Dennis Brandt commented that it flew ter having more thickness and less camber). (that's me) has moved! The problem is that much easier than a stock Flinger, and, from The JC-15 is 8.5-percent thick and can pene I'm on many mailing lists with my old ad what I observed, it climbed a lot faster with trate 30 mph slope winds with ease (Rod dress. The new one is 3610 Amberwood no comparative drop in performance in any flies this plane mostly over the slopes of Ct., Lake Elsinore, California 92330. If you other area. Orange County). He flies with a rather rear could ask your newsletter editor to change Besides the trophy winners and top ten ward CG, 45 percent! The overall effect of that mailing list, I'd appreciate it. I use (or eleven) pilots and planes, there were other interesting designs. One such design was Pete Olsen's "Fanta >EHTS THE FINS sia." This was very beautiful in flight, and STARTER BATTERIES. because of this I snapped a couple of 12 Uott* 4.0 Rmp. hour photos of it passing under some cloud for Β0-Ρ ASSOCIATES Ulith mations. This model had the usual 59.75 more than 25 years (1.5 meter) wingspan, a very average 375 Experience In the Design, square inches of area, a rather uncommon Menufacturlng, end (for RCHLG) E193 airfoil, and a somewhat Assembling of Nickel heavy 16-ounce total weight fora loading of Cadmium cells ond 6.15 ounces per square foot. The way it was all put together was fairly unique. It has a T- batteries, noui presents tail stab, pod and fiberglass tailboom, and a the FINEST STARTER balsa-covered foam core wing. The main BATTERY FOR YOUR wing panels had no sweep in their trailing STARTER, uilth Charger. edges but mild sweep back in their leading Just Charge It once, end edges. The tip panels were very swept in it urill last the weekend for Starting your Plane. Rlso 2.0 and 7.0 Rmp. Hr. both LE and TE. The plane had a constant taper root to tip. Pete says next time he's go ®»(P ®88®(EDSITES !P.®„ ® ® bo 22®34) F°r γ «πΓ nbrei.!r|rtp-need* ’ QQPracctSp ΤΠΒ 7®?®2-2®84) (JfflOD®®2- ing to go sparless and just run 1/32 sheet SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 97 Not all the models climbed skyward as dependably as a Bob W hite Wakefield. Sev CONGRATULATIONS eral fliers learned, totheirchagrin, that little trim changes can end up in big crashes. Bob 1987 NAT’S WINNERS Beecroft and Vic Cunnyngham Jr. met unex 1st Place pectedly in mid-field on Saturday morning MASTERS - JIM EIDE when their models met the earth with a EXPERT - GENE MAXWELL thud! Bob's 1/2A "Prolepsis" made less of a SPORTSMAN - GENE RODGERS thud than Vic's huge "Sirroco 1 1 0 0 ," but a number of splattered parts were about the same. W e recorded for posterity these two AGAIN - OUR THANKS gentlemen sharing a sorrowful glance amid TO ALL THE the debris. M y advice to put each model in “TIPO” FLYERS a trash bag with a gallon of "Hot Stuff" was ignored with contempt. T H IS Y EA R ! The flight line, and adjacent campsite, is laid out in a huge "L" with the scale fliers and modern fliers on one leg and the Old Timers on the other. For most of the day, this allowed good segregation. The vista from downwind at the OT site was superb, as you could observe power patterns on the FAI ships and see how high those young arms - Now available: TIPO+,* could fling a HLG. San Diegan Bob Boyer, the Robert Redford of F/F, shot his model TIPO 750, H IP P O T IPO (825), Write or call for full information. right into lift to win "O ne Flight" HLG. We j watched it drift all the way across the field, DICK HANSON MODELS ALL SHIPPING VIA UPS slowly gaining height before it DT'd into the AVAILABLE DIRECT FROM 5269 LUCKY CLOVER LANE UPS CHARGES EXTRA sagebrush. Bob must have learned some MURRAY UTAH 84123 PHONE (801) 261-1402 thing from his dad, OT flier Larry Boyer. Too old for HLG, Larry contented himself with wowing us all with a magnificent flight on his Bunch Tiger-powered Comet "Clipper." Unfortunately, it had a rough DT and se yTrfC M AKES IT EASY/ vered the wing upon contact with terra too Authentic Scale Instrument Kits firma. Another OT enthusiast from San Diego, Museum Quality Results · · · © · · ’ Srondard Aviation Don Munn, had a cute little Pee Wee 30 •A selection of 63 assorted instruments Including .020-powered Shulman "W edgie" that first time ever. WORLD WAR I n. caught our eye. It also caused eye strain; it •20 instrument bezels with clear pjastic faces. /λ JL· e*. f&k \ flew O O S on a 25-second engine run! Ap Instrument rims are thin, true to life parently this is the second "Wedgie" he has •Simple, new method of making Instruments sacrificed. Thermals do have an appetite for Scelr Instrument S im produces fantastic looking instrument panels. JT-3 1/3 11/16·' A J” 850 models with no DT, Don. JT-4 1/4 1/2·* & 3/4” 850 • Detailed instructions show various methods for JT-5 1/5 3/8” A 5/8” 650 W e have mentioned a number of colorful making general aviation, cars, boats, military JT-6 1/6 5/16· A 1/2” 650 personalities among the desert rats that and World War I instruments. JT-7 1/7 9/32" A 7/16” 650 JT*8 1/8 1/4·· A 3/8” 550 flew F/F over three days of the Memorial Com owf· oocxoge contorts 83 ono 98 MODEL BUILDER SHELDON’S HOBBIES POSI-CURE” CYANOACRYLATE SALE WE’VE GOT THE CURE ^ We’ve got the cure whether you’re torn, ripped, shredded, frazzled, smashed, crushed, cracked, chipped, fractured, split, snapped and shattered or just a little bit stressed. 1 oz. Fast Cure 3-5 Sec...... $ 2 .4 9 2 oz. Fast Cure 3-5 Sec...... $ 3 .9 6 ’ P 1 o z. Gap-Filling 10-25 Sec...... $ 2 .4 9 2 oz. Gap-Filling 10-25 Sec...... $ 3 .9 6 If you are not satisfied with POSI-CURE please return the unused portion within 30 days for a full refund - No questions asked! SHELDON S HOBBIES ■ 2 135 Old Oakland Rd. · San Jose. California 951 31 flfe ORDERS (800) 228-3237 SET ONLY (800)822-1688 S'“ For Information Call: (408) 943-0872 SHIPPING - U P S. Surface Add S3 95. U P S. Air Add 10% Parcel Post Add 10%. Parcel Post Air Add 15%. C O.I) Add $2.50 masiet charge HOURS: Mon & Fn 9:30-7:30. Tue. Wed & Sal 9:30-5:30. Thurs 9:30-9:00. Sun, 12:00-5:00 Charlie Yost has escaped from San Diego to degree range and wind to five mph. Nichols as seen in Photo No. 14 wearing sponsor a jimmy Allen Old Timer event. Outstanding scale flier was Mik Mikkle what we would call a "California Shirt" (ac The Jimmy Allen designs from the thirties son, who built a giant Focke-Wulf 47 tually an airplane shirt somewhat similar to are a real trip for the OT crowd. High wing "Stosser" for Jumbo Scale. His ship got top the jacket Pond wears). Henry is offering or low wing, they are real flyers. All are stick scale points in judging, and then he some advice to his son Richard who is the and tissue, with long wire landing gear and proceeded to sacrifice it to Hung on an builder and flier of the English Mercury de huge wheels. They have those classic pro O O S flight to Maricopa, a nearby hamlet. sign with "ZAP" on the rudder. portions that say “This is a high climber." Fortunately, it was found and returned after This scene is typical of the Old Warden Phil Moore of SD O had a slick 1935 Jimmy the meet. Mik took home the Otto Behrens Vintage Meet held near the Shuttleworth Allen "Sky Raider/' a bitty thing at 26-inch trophy for top score in Jumbo (over 36-inch Collection Museum. Henry Nichols has span but still potent. Bob Langdon chose span rubber). been coming to these meets ever since they the much larger Jimmy Allen "Bluebird" With two days of gorgeous, not-very-hot started. Although he is now retired from his with 38-inch span from 1934. This Jimmy weather, the "foreign legion" of desert fliers hobby business and not active in flying, Allen event, with half a dozen designs to had much to be thankful for. All agreed to Henry thoroughly enjoys meeting and talk choose from, may well catch on with the return in a year to the arid region to sample ing with fellow modelers. OT crowd. Mik Mikkleson, of Hollywood, the food of Taft and the fortunes of the flying No modeler worth his salt has ever even flew one by proxy for a Detroit area Al field. You don't have to go to Palm Springs missed the Nichols Hobby Shop on Hollo len fan. and play golf with Bob Hope to enjoy the way Street in England. You never knew who Also on OT ROW we discovered Carl deserts of California. · you were liable to run into there! Hatrak trying to hide his big brown and READERS WRITE white 1936 "Miss Fortune." This was the Plug Sparks... Continued from page 32 Ever so often we get a letter from Dick little-known predecessor of the famous Tanis berating Joe Beshar for some of his "Trenton Terror" designed by Mickey Abell's model is powered by a FROG (En ideas about making radio control out of free DeAngelis. Hatrak was a member of the glish acronym for Flying Rise Off Ground) flight models and vice versa, making R/C Trenton club at the time. His ship has a Mor 500 engine. This 5cc engine, glow oper models into F/F mode. rill Hornet .19 on the nose and an IC M A A ated, was enough power for Abell to tie for This writer has carefully abstained from logo on the silk-covered wings. Now he first place at the SAM Canowindra Champs any comments on the "new A M A F/F R/C flies with the SCIFS club in Los Angeles. in 1987. Abell is hoping for greater things Assist" rules, as the free flighters have been We really don't like mentioning the high when the engine is fully broke in. New raising enough hob with the idea. Very winds (gusts to 50 mph) that came in Satur pistons take time to seat! frankly, this writer regards the radio control day night blowing down sunshades and ENGLAND discipline as too tough for the free (lighter creating a camper's nightmare! Bill Warner We have been carefully hoarding the to endure. had his tent blown down before dawn, so photos sent in by Alex Imrie who writes an Case in point is the popular method of he stole away to Los Angeles. Those scale excellent old timer column called "Vintage piggybacking models in a thermal. This fliers who remained elected to wait until Corner" for the British model magazine, writer can just see the reaction now as one Monday to fly. Good thing they did, as it Aeromodeller. model is spotted in a thermal. The modeler was a repeat of Saturday, balmy in the 80- This time, we feature a photo of Henry J. rushes to get his model ready, fires up his SEPTEMBER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 99 engine, and then: whoa! Do you have the Bill reports that the Sailplane came out frequency pin? No, sorry, old boy, but the pretty heavy, in the 100-ounce range. In a HAYES WHIP ANTENNA model in the thermal already has that fre weight reduction movement, he replaced quency tied up. That will get the staunchest all Futaba SI30 servos with the micro SI33 free flight modeler! Futaba servos. According to Bill, this was From a casual sport flying standpoint, the source of all his glitches and wild antics particularly in restricted areas, this is the in the air. way to go; but remember any competition Bill feels that micro servos are not able to is severely limited toa number of frequency function in an environment of vibration that Vertical whip pins available and a number of radio sets on the red hot Sky Devil creates. After much ar antenna replaces any these frequencies. gument about RF1 causing servos to fail and 18 or 36-inch receiver As can be seen in Photo No. 15, Dick the spark plug coming loose at critical mo Tanis of Hawthorne, New Jersey, is posing antenna for R/C cars and ments, Bill is now using shielded spark plug with his radio-controlled old timer, a Kloud leads (from CH Electronics) that keep the boats. Connec tors, vertical King, a design produced by Mickey De- high-tension lead from separating from the and horizontal mounts and Angelis, quite the designer of gassies in the spark plug. 1934-40 era. safety ball all included. In addition, he has had all the SI30 servos On a bet, Dick built this model and flew repaired and fitted with new amplifiers. Bill Stainless spring steel it in seven days! This blue and yellow feels that separation of the high-tension whip only 1/32 diameter for model, built in 1971, is still flying utilizing lead created enough noise to ruin the .19- to .40-size engines, depending on the minimum wind resistance. servos. Available at your event entered. As Dick points out, the old timer R/C events are extremely popular at Bill Carpenter, an associate, doesn't be local dealer. the SAM Champs but again that old buga lieve Preston's theory about high vibration boo of having to wait on your particular and sudden inrush of RFI caused servo frequency. failure. Bill reports that he has run into MORE READERS WRITE many cases of RFI that have not damaged Received a most interesting letter from the servos. Bill Preston, 11945 Miller Road, Bainbridge However, Preston is still concerned this Isle, Washington 98110, who sends in Photo situation could repeat itself. It is this writer's No. 16 showing Bill with his Sky Devil- opinion that the use of a 10K Ohm resistor powered Comet Sailplane. This picture was at the spark plug connector is a must. That taken at Harts Lake Prairie near Tacoma, high spike of electrical noise must be, and Washington, where SAM 8 contests are can be, reduced. No problems have been HAYES PRODUCTS held. reported using this system of commercially One of the big problems using a Sky made high-tension, shielded leads made by 14325 Commerce Wy. Devil engine appears to be the vibration in 77 Products, 17119 So. Harvard, Gardena, Garden Grove, CA 92643 duced in servos by this powerful engine. California 90247. Pay attention fellows! RCMB Inc., publisher of MODEL BUILDER, brings you an exciting new magazine, about the fastest-growing hobby in the world! M odel Cars R c ONTROL .. .covering all types of gas and electric-powered SAVE $5.00 OFF THE YEARLY model cars... NEWSSTAND PURCHASE PRICE! Featuring: $2500 FOR ONE YEAR (12 ISSUES) f Y E A R S (24 ISSU E S) • Product Reviews .?A?rPP .9P.JYK9. • Competition News V L IA U PNIMTI • How-To Features • Manufacturer’s Profiles • Expert Columnists VISA or M/C Να (ADD 5%>_ Overseas, one year(including Canada & Mexico, AN RCMB INC PUBLICATION but not APO or FPO, $38.00. For 2 years, $68.00. Payment must be in U.S. funds, drawn -MOL 898 W. 16th St., Newport Beach, CA 92663 on a U.S. bank. 100 MODEL BUILDER TOMY TOY CONVERSIONS CANNON f t » » » · 1806)581 5061 Ever so often an article is written on how — R/C s y s t e m s 2828 Cochran St Suite 281 to convert the Tomy-Toy animals into aircraft Siml Valley. CA 93065 shutoff timers. Jim Alaback, newsletter edi 1988 SUPER-MICRO R/C SYSTEMS tor of SAM 41 Aero News newsletter, fea tured a writeup on how to convert a Tomy RAHIM'S M O D EL 910 Toy. SUPER-MICRO SEE YO U R Sometime last year, this writer offered R/C SYSTEM DEALER OR completed Tomy-type timers as built by ORDER WINCHES & LINE John Fletcher of Australia. Needless to say, DIRECT these were gone very quickly. Having just received another dozen, it is again first MADE IN RETRIEVERS come, first serve. U.S.A. The only drawback this time is that the price has jumped to $15 each. Regardless, these timers are still a bargain when consid ering the time and effort put into them. If you are interested, write to John Pond, 4269 Sayoko Circle, San Jose, California 95136, enclosing your money. We'll gettum NARROW BAND 750 MW TX, WITH AMA GOLD out as long as they last. STICKER. SERVO REVERSING, MUCH MORE! TX 1 NARROW 8AND RX WORK ON 1991 20 KHZ Might also mention if the demand is big SPACINGS, AVAILABLE ON NEW 72 FREQS. enough, Jon Fletcher will make more as he IMPROVED CE-9C MICRO SERVO - $ 4 1 . 9 5 is interested in a swap deal. This is an easy SUPER-MICRO SYSTEM PRICES (72MHZ) way to avoid heavy custom duties. If inter ested, let us hear from you. 2 CH. 2 SERVOS (2.37 0 Z .) $237.95 THE WRAP-UP 3 CH. 3 SERVOS (2.81 O Z.) $280.95 Fred Lehmberg, who produces the 4 CH. 4 SERVOS (3.25 OZ.) $324.95 Feather Merchant line of old timer kits, sent in a photo of John Cates, who has gained 5 CH. 4 SERVOS (3.26 OZ.) $335.95 considerable notoriety in flying Lehmberg's TX DUAL RATES $15.00 MIXER $39.95 WINCH $300 "Goon" design. SYSTEM S S H $8.50 Photo No. 17 shows Gates and his NOVA AND CLASSIC NARROW BAND R/C AVAIL. POWERFUL 12-VOLT bearded friend, Rick Martin, in the back BROCHURE $1.00 IN U .S.A . AND $2.00 ground. The caption for the photo was sug FOREIGN. ADD EQUIPMENT SALES TAX IN CA. F3B QUALITY gested by Fred, so the fun is between that CASH PRICES SHOWN. ______trio! CARDS 5ϊ MORE WS4 LAUNCH A PLANE Lehmberg's piece de resistance was a 20t DEPOSIT ON COD small order placed back in 1934 (the best EVERY 60 SECONDS date this writer can come up with) and writ ten from Assembly Hotel, Sumner, Washington: P.A.W. DIESELS "Woburn Model Airplane Shop, 19 Bel •049 το -35, RG & STD mont St., Dept. UM-3, Woburn, Mas sachusetts. "Kindly send me the following order. I en SEND S1 FOR LISTS & closed 52 cents and (blank) for postage. USEFUL DIESEL INFO. "Sincerely yours, Jack Towne. "2 ounces colorless cement, .16; 1Λ6 x 2 ERIC CLUTTON, sheet balsa (2), .05; 1/8 flat rubber (20 feet), 913 CEDAR LANE, .20; 1/8 x 1/4 balsa sticks (2), .03; No. 10 TULLAHOMA, TN.37388 music wire, .01; 3/4 and 1 in. dia. balsa wheels, .07; total, .52." Now how about DAVIES-CHARLTON DIESELS! that! I'll bet that hobby shop got rich on that NEW PRODUCTION! A order! It is a wonder this particular shop in DART .03 EXCELLENT Massachusetts didn't have a minimum MERLIN .045 QUALITY. amount to order. SPITFIRE .06 ENGLISH Just to look at the prices quoted in those SABRE .09 MADE. days is enough to make the strongest man RETRIEVER $250 cry. I particularly like the glue price! Re member fellows, this was over 50 years ago! touch with a club, you can keep up with 6-VOLT their activities through meetings and news letters, which may provide more up-to-date RETRIEVE WINCH Control Line.. Continued from page 43 information. There also is at least one independent re LINE IN 20 SECONDS As I started to say above, A M A can refer gional newsletter devoted entirely to you to the nearest club because it has control-line. Serving primarily the Pacific records on all clubs, updated annually. It Northwest, it's called Flying Lines and can also has a computerized list of all members be contacted at this address: Flying Lines, P. and their interests, so it could put you in O. Box 177, Kila, Montana 59920. Subscrip RAHM'S touch with members in your local area. tions are $12 for 10 issues. 9309 E. Maple St. If ail else fails, you can find a wide array of Once you have tracked down that experi modelers to meet, talk to, and learn from at enced modeler, use him (or her; there are Bellflower, CA 90706 any contest. You can find out about nearby some female fliers) as your teacher, coach, contests by checking the competition cal mentor, and guide. All CL modelers are in Phone (213) 866-2405 endar published by AMA. Once you get in terested in building up the fraternity and SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 101 come up with many choices of good kits made by garage manufacturers for CL en thusiasts. If you can't find a suitable kit for your first ADVANCED HANDLAUNCH CUDift try, look through the plans available through all the major magazines and try building a plane from scratch. Follow kit or plane instructions carefully, and use the expertise of your "coach" to fill in gaps or update you on modern tech niques, and you will soon be flying. KEEP IT SIMPLE A radical idea for your first airplane: make it ugly. Learn from the pros at Top Flite! Don't make what's probably the most Step-by-step MONOKOTE* application common mistake of people jumping into details in clear, easy-to-follow, full-color the hobby by themselves, a mistake that al close up action! Winss. Fuselage. Trims. most always leads to failure and quitting the Color-on-color. Designs. Hinging. Basic Select wood, D.T. Hardware, Balsa Fuselage. hobby before you really get started. through advanced heat gun and iron Beveled Wing. Available at your dealer. Don't try to be too fancy. Don't look for usage techniques. the kit with the biggest plane, the most (Each tape approximately 1 hour). $2.50 shipping on direct orders. realistic, the brightest colors, the biggest "MONOKOTE Γ engine. Get a simple, sturdy, inexpensive Basics on Wings, Tail Sections, Fuselages, plane. If you can find an old Top Flite "Flite Hinging, Color Schemes and Trimming. Complete Supply of Free Streak" Trainer, or build one of the simple "MONONOTE* II" Flight Items & Tissue, Timers, Winders, trainers published frequently in the maga Advanced Color Schemes, Designs, Wing Crocket Hooks, Front End Bearings, zines, that would be best. Tips, Multi-Color Combos, and MORE! Pacifier Refills, Rubber, D.T. Fuse, I recommend that adults, if they have ex "MONOKOTE4 III" pert help, go with a .35-size plane. The big Airframe Prep, Advanced Wing Tips, More Micro-X Kits, Cox Engine Parts ones are easier to fly. Kids and adults with on Hinging, Color-on-Color, Graphics, Painting, and MORE! out help should try 1/2A (.049) size planes Catalog $1.00 because they can withstand much more "m o n o k o t e nr· More on Wing Tips, Canopy Covering, abuse, though they're trickier to fly. Use a Advanced Graphics, Striping, Car Bodies, CAMPBELLS CUSTOM KITS profile-type design (the fuselage is simply a and MORE! Box 5996 flat sheet of wood, not a built-up body). "MONOKOTE' V Lakeworth · FL 33461 Don't spend a lot of time finishing and Detailing Chrome, Scale Tips, Concave decorating your plane to be a masterpiece Surfaces, Fragile Wing Tips, and MORE! of art and beauty. You're going to crash this plane. will be glad to talk to you at great length, in Build it simple and strong and don't vite you into their workshops, help you fly, worry about how it looks. Don't even paint etc. it. Just make it fuelproof. Don't be discouraged if you have a little The worst impediment to learning to fly is trouble getting a lively conversation going to go to the field with your first plane and be the first time you approach a modeler at a afraid to fly it. contest. Remember that at a contest, the Make the first plane one you aren't afraid fliers are competing. It's fun, but it's a seri to fly, crash, repair, fly, crash, repair, etc. If ous competition as well, and they have a lot you have time and materials, build two or on their minds. three of them. Always be building a new Watch, listen, and learn, and when the one while you're flying the one you just opportunity comes, the modeler will be finished. GREAT FOR CLUB MEETINGS! glad to meet you. As soon as you learn to fly level, start It's not that you can't get started without working on wingovers, loops, figure eights, RENT OR BUY! experienced help, but it will save you much and inverted flight. By all means, begin $39.95 each time, effort, and frustration. Modern build learning upside-down flying as soon as you ($20 Refund per tape on Rentals, if ing techniques and the vagaries of flying CL have mastered upright. The longer you returned undamaged within 30 days.) planes can't be communicated through kit procrastinate, the harder it will be to learn Please specify I, II, III, IV, or V with order. plans or the instructions on tubes of glue. inverted flight. Inverted flight is enjoyable That hands-on help really pays off, and it's for sport flying and an absolute essential for SPECIAL PURCHASE - ONLY nice to have somebody to share your hobby combat or aerobatics. COMBO OFFER with as well. THE CL "SPORT" Combination 2-hour long tapes Again, talking of "the old days," the likeli For many model aviators, the joy of flying (Specify I & II or III & IV) hood was that your first plane would be on a sunny Sunday afternoon, doing laps, Only $65 each! Save $14.90! built from a kit made by a major manufac loops, and lazy-eights with their colorful (Sorry, no rentals available turer. It would be simple profile, powered Ringmaster or sport-stunter is enough. on Combo tapes) by a stunt-type .35 or .15 or one of many Others, though, once they become profi Send check or M.O. with Name, Full small kits designed for an .049 engine. cient at this "sport" flying, get the idea of Address and choice of VHS or BETA One of the unfortunate trends has been playing games with their planes. Maybe format to: that some of the big kit manufacturers have they want to see who can fly inverted the abandoned CL in favor of R/C. There are longest, or who can do the most touch-and- some good kits available, but you may have goes, and one thing leads to another. Before TOP FLITE MODELS, INC. to look for them. However, every problem you know it, they're flying fast combat at the Monokote Video Course has a solution. If you can't find kits in your Nats. 2635 S. Wabash Ave. hobby shops, try researching the newslet But let's back up. What are the competi Chicago, IL 60616 ters of the special interest organizations tion events and what happens in them? Fol (listed here in the June edition), and you'll lowing is a quick overview of the main com- 102 MODEL BUILDER TatfllB (fliMft 511.95 Radio Control The 12th Edition of the Radio Control Buyers Buyers Guide Guide is available direct from Kaimbach! Now you can own the source book of radio control modeling in formation - the Radio Control Buyers Guide! In more than 300 pages, and thousands of product listings, this all-new 12th Edition of the Ra dio Control Buyers Guide provides the up-to-date information every radio control enthusiast needs - whether you're a beginner or a NATS champion. There's no other R/C book source like it! #24626 • Aircraft · Cars · Boats · Radios · Systems · Engines • Hardware · Books · Videos · Finishing materials • Accessories · R/C dealers · Plus much more! $11.95 ORDER TODAY! Kaimbach Publishing Co., 1027 N. 7th St„ Milwaukee, Wl 53233-1471 Y E S! Please send me copies of the Radio Control Buyers Guide! Price per copy is $11.95/#24626. □ My check is enclosed. □ Charge my credit card Charge to: □ Mastercard □ Visa Name______Card # ______ Street______Exp. date______ City, State, Z ip ______Signature______ Include for postage and handling: U. S. S1; foreign $1.50. Make payment in U. S. funds. Wisconsin residents add 5% sales tax. 0023 petition types, which we'll expand on in future columns. The best way to learn about the main competition events, in detail, of course, is PORTABLE PIT STOP. to obtain the official rulebook from the AMA. With your A M A membership you are entitled to a rulebook, though this year you must request it. All A M A members will re ceive a membership manual with a lot of general information about the organiza tion, but the rulebook is sent only to mem bers who request it on a form provided by AMA when your membership is ac knowledged. Fun-fly Events: A whole variety of inter esting and amusing activities exist not in the A M A rulebook but in the informal Sun day fun-fly activities of clubs. These are usually designed to be easy for the average modeler and usually don't require any spe THE ALL PURPOSE SHELTER THAT YOU CAN cial equipment. Sometimes several events are combined. Here are just a few: PUT UP OR TAKE DOWN IN SECONDS. High-low. Each contestant flies his plane Whether your pit stop is at the track, park, beach or even in your own as fast as it will go for a measured quarter back yard, E-Z U P’“ shelters are the answer. No tools needed. Free stand mile (7 laps on 60-foot lines) and lands. He ing. They are super light weight and self contained. may then change prop, glow plug, and/or Standard 10' x 15,' red or blue, $449.95. Assorted sizes, colors and fuel and then fly as slow as he can for an lettering also available. other quarter mile. The difference in mph between slow and fast is the score. Blind man's bluff. Can you fly blind M a r t i l B r o t h e r s folded? Add a balloon bust task. It can be a c i n g r o d u c t s pretty wild. = R P W C SHIP 0 Λ I L r. Time target. How's your sense of time? Try to set your plane up for a six-minute flight. Call toll free today. Using no clocks, watches, or signals from 1800 882 RACE your crew, make a flight that's as close as possible to two minutes 'takeoff to touch 5331 Little John, Katy, Texas 77449 or 2902 Alvarado Sq., Baltimore, Maryland 21234 down). Starting with 120 points (one for MasterCard. VISA. Money Order. Certified Check. C O D. Accepted SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ΈΜ MODEL BUILDER SENT YOU! 103 IMPORTANT INSTRUCTIONS: Non-commercial (personal items) rate is 25 CLASSIFIED ADS cents per word, with a minimum of $3.00. Commercial rate is 40 cents per word, with a minimum of $5.00. No advertising agency discounts allowed. Name and address free, phone number counts as two words, abbreviations count as whole words and will be spelled out. All ads are payable with order, and may be for any consecutive insertion period specified. Send ad payment to: MODEL BUILDER, Classified Ads, 898 W. 16th, Newport Beach, CA 92663. W ANTED: Berkeley and Cleveland kits or N O W LEN A E R O Peanut Scale Classics: Wright WANTED: EARLY PROPORTIONAL R/C SYS related items: parts, plans, boxes, brochures, Type A $6.95, Nieuport 11, Deperdussin $10.95, T E M S (1961-1973): G ood TTPW, Orbit Analog. books, ads. radio equipment, accessories, etc. Bristol Scout $13.95, Aerodrome $7.95. $2.00 Sampey 404, Space Control, Digicon. Kraft- Gordon Blume. 4649-191st Ava S.E., Issaquah, S& H any size order within U S.. 139 Boardwalk Pullen. Accutrol. A C L Digilog, Klinetronics As- Washington 98027. B. Greenbrae. California 94904. troguide. Spar. Controlaire Mix-X, PCS, Proline, S&O. Logictrol and others. Mike Shabot. 27286 SPECIALIZING IN FIBERGLASS FUSE CU STO M E M B R O ID E R E D PATCHES. Your de Eastvale Road, Palos Verdes Peninsula, Califor LAGES: For the model glider enthusiast. Free sign. made any size shape colors. Five-patch nia 90274 (213) 855-5874 (days). (213) 541-7229 Catalog. Includes scale and thermal semi-kits. minimum, guaranteed colorfast. Free brochure (nights/weekends). Viking Models USA. 2026 Spring Lake Drive. Hein Specialties, Inc., Dept. 238, 4202 North Martinez, California 94553: (415) 689-0766 Drake. Chicago. Illinois 60618-1113. NEW, BIG BEAUTIFUL COLOR FIGHTER POSTERS: Size 17" by 22". F-16. F-15. F-4, A-10, OLDTIM ERS: Built by Dale Myers. Electric R/C C-130, C-5, T-37B. Send only $6.95 per poster W ANTED. RTF u/c planes from Aurora/K&B, flying. All-transparent covered. Super Buc — plus $2.05 postage and handling to: Carter Ser Comet. Cox. Gilbert, Sterling, Testors, Wenmac. Scram 83" — Kerswap — Pacer C — King vices, 57 Berkley Street, Valley Stream, New etc. Compete or pieces, buy or trade John Burg — Pacific Ace — Strate Streak 66" — York 11581 Berkley Currier Sportster — Record Hound — Fietze P O. Box 593, Lynbrook, New York 11563. Trenton Terror. Models cannot be shipped. Dale NEW! VOLUME 3 of Bill Hannan's PEANUTS Myers R D #3 Stewartstown, Pennsylvania W ESTERN PLA N SERVICE. Specializing in Fly & PISTACHIOS INTERNATIONAL: Plans, 17363, (717) 993-6246. ing Wings. For free flight, radio control and old photos, pointers and whimsey: $5. Still availa timers. New Catalog $2.00,5621 Michelle Drive ble V O LU M E 2 at $4.95. VOYAGER, the excit Bill Hannan's PEANUTS & PISTACHIOS. Torrance, California 90503. ing story of Jeana and Dick’s daring round-the- Volume 3: Plans, photos, and pointers, $6.50 world flight. Hardbound, $19.95. Add $1.50 postpaid. SPECIAL COMBINATION OFFER: SCALE DOCUMENTATION: PLAN ENLARG postage and handling. California orders, add Volume 2 & 3, $10.95 postpaid. California or ING. Photo packs, three views, drawings for applicable sales tax. HANNAN'S RUNWAY. ders, add applicable sales tax. Latest catalog 1600 aircraft. Super Scale R/C plans for Giant, Box A, Escondido. California 92025. of plans, books, rubber and goodies. $2. H A N Sport. 60-page catalog $3.00. Scale Plans and N A N 'S RUNWAY, Box A. Escondido. California Photo Service, 3209 Madison Ave.. Greens ATTENTION all model builders. I have a plan 92025. boro. North Carolina 27403; (919)292-5239. for model aircraft. May be possible for you to win the air competition. This is specifically for W ANTED: Large engines for giant scale radio H O U S E FO R S A L E Beautiful three bedroom military. Write: Mr. H assan Siddique. 215 G ar control airplanes. Must be in good running con contemporary home in Orlando, Florida. den Block. Garden Town, Lahore. Pakistan. dition. Ray Hockersmith, 200 W. Willard St., Separate model workshop with air condition Muncie. Indiana 47302. ing and heat. 10 minutes to R/C World flying S P E C IA L IZ IN G in Major Decals: for fast ser site. Dick Nutting, 3363 Monika Cir.. Orlando. vice and good prices, send $1.00 for illustrated RANDOLPH nitrate and butyrate dope. Klotz Florida 32812. (407) 282-2216. catalog to: Clark's Aircrafters Supplies, 501 lubricants. Golden Age control line kits and Raintree. Malvern, Pennsylvania 19355. plans. Send large 45 104 MODEL BUILDER A D IN D E X Ace Radio C o n tro l...... 88 High S k y ...... 94 Pierce Aero C o...... 85 Aerodyne Ind...... 86 Historic Aviation ...... 1 Polk's Model Craft Hobbies...... 89 Air Champ Models Inc...... 76 Hobby H o rn ...... 94 R/C Model Car Subs...... 100 Airtronics, Inc...... Cover 2 R/C Buyers Guide ...... 72 Altech M arketin g...... Cover 4 Hobbypoxy Products...... 76 American Sailplane Designs...... 107 I.M.S. Pasadena...... 64 Rahm’s Winches 8< Retrievers...... 101 Associated Electrics...... 77 Indoor Model Supply ...... 90 Robart Manufacturing...... 94 Astro Flight Inc...... 63 J T e c ...... 98 Satellite C ity ...... 78, 79 B & D Model P ro d u c ts...... 94 Jed's Shade C a n o p ie s ...... 68 Scale Master C h am p ion sh ip s...... 84 B & P Associates...... 97 Jim Walston Retrieval System s...... 88 Sermos R/C Snap Connector...... 60 Beemer R/C West Dist. Inc...... 76 JM Lupperger P la n s ...... 71 Sheldon's Hobbies ...... 99 Byron Originals...... 83 Joe's Hobby Centers...... 74 Sid Morgan Vintage Plans...... 94 Campbell's Custom Kits ...... 102 John Pond O/T Plans ...... 97 Sig Manufacturing Co...... 4, 5 Cannon Electronics...... 101 Jomar Products...... 81 SR Batteries Inc...... 103 Carl Goldberg M o d e ls ...... 71,75 K 8< B Manufacturing...... 107 Su-Pr-Line P r o d u c ts ...... 93 Circus Hobbies ...... 67 K & S Engineering...... 69 T & D Fiberglass...... 66 Coverite...... 88 K & W Enterprises...... 90 T R C Engineering...... 90 Culpepper Models Inc...... 60 Magic Flite M o d e ls...... 92 Team, Inc...... 75 Cygnet Software...... 86 Mammoth Scale P la n s...... 60 Technopower II, Inc...... 80 Davey Systems Corp...... 73 Martel Bros...... 103 Teleflite Corporation...... 85 Dick Hanson Models ...... 98 McDaniel R/C, Inc...... 66 The Core House...... 78 D o y le je t...... 70 Micro M a r k ...... 86 The Four "M " Company ...... 92 Du-Bro Products...... 62 Micro-X Products...... 92 Thorpe Engr. (Star Hawk)...... 61 Electronic Model Systems...... 68 Midway Model Company ...... 86 Tom D i x o n ...... 60 Executive Radio Control...... 70 Millcott Corporation...... 74 Top Flite Models, Inc...... 102 F. A.I. Model S u p p ly ...... 66 Model Builder Binders...... 107 U. S. Boat & Ship Modeler Subs . 72 Fabtronics...... 97 Model Builder Full-Size Pla n s ...... 106 Uber Skiver ...... 108 Flyline Models, Inc...... 73 Model Builder Subs...... 96 V. F. Video Library...... 68 Fourmost Products...... 78 Model Rectifier Corporation ...... 91 Vinylwrite Custom Lettering...... 76 Fox Manufacturing C o...... 81 O. S. Engines ...... 95 Walt Mooney P e an u ts...... 105 Futaba Industries...... Cover 3 P. A.W. Diesels...... 101 Williams Bros...... 82 G. M. Precision Products...... 70 Pacer Tech (Z a p )...... 82 Wilshire Model C en te r...... 74 Great Planes M fg...... 87 Paper Airplanes International...... 90 World Engines...... 3 Hayes Products...... 100 Peck Polymers ...... 74 Zenith Aviation B o o k s ...... 65 petition is for beauty, flyability, etc. Or no .35- to .40-sized airplanes of a simple con level. Nobody ever has to feel outclassed, competition at all, just get them all out and figuration, ranging from 75 to 100 mph, and as you move gradually through the begin fly. sport racing is the point of entry into com ner, intermediate, and advanced levels to Crate race. Club provides some materi petition for many fliers. become an expert. als, such as wood from old apple crates, Precision aerobatics: This is another one Another advantage of stunt is that, once bellcranks, wire, nails, etc., and the contest of the common competition entry points. you get a good-flying airplane, itwill last for is as follows: Everybody takes the available The big, beautiful and graceful airplanes some time, as opposed to the more equip materials and builds a plane. First one fly are attractive to many newcomers to the ment-intensive combat events. The rules ing wins. model aviation hobby. Precision aerobatics are very stable, and there’s lots of room for The number of fun-fly events is as limit (nicknamed "stunt') doesn't require the creativity in design and decoration. The less as your imagination. high-horsepower, high-technology, or light same planes are legal in all classes. Racing: I mention racing first of the tradi ning reflexes of some of the competitive For starters, beginners should become tion competition events because it is the events. It does, however, require much proficient at flying upright and inverted and one that probably is the starting place for study, careful craftsmanship, and a lot of begin learning the maneuvers shown in the the most CL modelers. In its simplest form, practice. A M A rulebook. They probably should start all one has to be able to do is start an engine The competition involves flying a with a simple profile, move to a flapped and fly around level. It's not much different prescribed pattern of maneuvers, with the profile stunter (many good designs exist) in its most challenging form, except that quality of the flight scored maneuver by and graduate to full-fuselage ships as their everything goes around a lot faster. maneuver by a panel of judges. proficiency increases. The basics of CL racing are as follows: Stunt fliers have a very strong national or An associated event is Old-Time Stunt, a Races involve multiple-plane flights over a ganization and a very supportive fraternity, nostalgia event that recreates the stunt measured distance. Pit crews start engines with everyone willing to help newcomers. event of the late 1940s and early 1950s. and launch the planes upon the "C o " sig The event also has the immensely success Navy Carrier: This is another event that nal. Laps are counted at the point on the cir ful PAMPA (Precision Aerobatics Model Pi attracts many newcomers because the cle where the plane started, and time is kept lots Association) skill classes, so that fliers planes look like real planes, the event simu by stopwatches. compete against others in their own ability lates wartime Navy carrier operations, and For example, preliminary heats for most racing events (above 1/2A) are 5 miles (70 laps on 60-foot lines), and feature races are 10 miles (140 laps). ^ % B A G .# 6 t e f c * The fastest A M A classes (rat, slow rat, Goodyear) usually involve two planes at a time, the slower, regional sport races usually have three or four up. %g^miRTY-SIX OF WALT MOONEY’S FAVORITE Either best times or best scoring in round- robin heats are advanced to the feature 2 _ P E A N U T SCALES REDUCED TO EIGHT INCH races. Often a pair of preliminary heats are e?jj5^VING SPAN ************ $ 5.00 POST PAID combined for a total time. Races range in size and difficulty from the sometimes hilarious 1/2A Mouse Race, using tiny .049-sized airplanes, to the fast and terrifying A M A Rat Race, using .40- sized planes going 160 mph. Probably the fWALT MOONEY P.O. BOX 231192 SAN DIEGO, most popular form is sport racing, which is CALIF. 92123 *** FIRST FIVE PEANUT SCALE done under slightly different rules in differ ent parts of the country. These usually are BAGS STILL AVAILABLE AT $ 5.00 EACH. SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS. TELL 'EM MODEL BUILDER SENT YOU! 105 N O T ICE: NEW Full-Size Plan prices are now in effect. Send a long, self-addressed envelope for your list of revised plan prices. event is learning to set up and operatethe and setup to learning event is hotead he-iesse, ih which throttle three-linesystem, with and require not does it because comers newfor accessible fairly is task theflying 106 low-a segment, carrierhigh-speed a deck, maneuvers. speed segment, and an arrested landing segment,anspeedarrested on and landing ter practice.of ter that, inactivities,many as it's just mata carrierexperiencedanyassist. flierAf can the deck. Scoring in each task (high speed,intask (high each the Scoring deck. for fidelityrealto a carrier aircraft. low speed, is and landing) toadded a bonus o te nie dfiut o prt. ts a It's operate. to difficult engines the nor build todifficult not are the airplanes and fliers.startedbe It can fairlyinexpensively, new some in itspectators,pulls often and o 98 DATED XY1 $7.50 S10.00 XBY-1 D E T A ID L O S N O C 9882 No. R A T S K C A L B 9881 No. o 17-T PPER $10.00 R E P IP Z G R E B D L O G 1073-0T No. inginstructions werepart ofthe article. Magazine include a reprint of the construction article, if build o 88 MEYERS T-6 $10.00 OTW-160 S R E Y E M 8881 No. The The task involves takeoff from a simulated the of part difficult most the Perhaps Combat: This is This the Combat: event that attracts the $5.00 $10.00 FOO-2-U-2 788-OT No. JOHN E L T LIT 7881 No. o 7-TS 4 $8.50 48 K O O SP 973-OT No. o 48 T S $7.50 X E L P U D 'S O Z N A L OT 488 No. o 48 BOXY- $7.50 -Z Y X O B 4881 No. $10.00 SU-26 I O H K U S 6881 No. o 88-T ..COMMERCI $5.00 L IA C R E M M O C F.A. 8881-OT No. l Fl-ie ln prhsd from purchased plans Full-Size All ED O MDL ULE PAS SERVICE PLANS BUILDER MODEL TO: SEND 898 W. 16th St.. Newport Beach. CA 92663 CA Beach. Newport 16th W. St.. 898 ai ea erw b Pi BernhardL Phil by Redrawn era cabin Most famous of all OT gas models, ended models, gas OT all of famous Most an .049. Uses foam wings. By Saponara. By wings. foam Uses .049. an setwn,Vetie R/ mdl for model /C R Vee-tailed swept-wing, A iha2-nh pn B Mr Fineman. Mark By span. 27-inch a with Well-known gull wing design qualifies for qualifies design wing gull Well-known scale 1/20 in bomber rubber-powered A A small electric version of Dick Obarski's Dick of electric version small A Antique Old Timers. By Snyder 8< Muir. Snyder By Timers. Old Antique 1938 Old Timer favorite. By Don Srull. Don By favorite. Timer Old 1938 A sport-scale replica of a classic biplane classic a of replica sport-scale A o 4 oe. 034 pn Rohrback. span. 50-3/4” power. .45 for From the October, 1936 issue of Flying issue of 1936 October, the From Aces, a fun rubber job by Herbert Spatz. Herbert by job rubber a fun Aces, Bi Jh, fr4srkr.A McLeod. A. 4-strokers. for John," ig "B Northrop's Bill of version Reduced-size foam wings, easy building. By G. Weber. G. By easy building. wings, foam 12 aaddsg o C ih Ace with /C R for design canard 1/2A A A control line profile model for .35 eng .35 for line profile model control A ines. 48-1/2-inch wingspan. R.Schneider. wingspan. ines.48-1/2-inch odstigrbe oe rm 1937. from model rubber setting cord htLnosfmu 2ic pn re span 42-inch famous Lanzo's Chet BUILQEl iiu odr $10.00 order: Minimum 4 LDER E D IL U B L E D O M r soe fr us "il" rmvn the (removing "kills" cuts, for scored are tries pilot streamer, each crepe-paper and fastergo. more excitingasyou and which the which airframes are more or considered streamer),whole for and time in the air dur streamerplane.Points fromthe opponent's totoplane cut his remove or maneuver the a tows planes two of Each "dogfighting." intoitdifficult classes, themore move gets event contests.many inpopular h try otn esbead inexpensive thesturdy, and reusable often to get to thatwhile stage. itbuttakes wreck,a will feweryou planes in event one the is this because planes, es dsoal. Te etr o gt the get, better you The "disposable." less building workshop the in time of plenty period. theing match es res icue Cnd ad Mexico) and Canada (includes orders seas Over handling. and of totalorder for shipping ders. California residents add 6 % sales tax. sales % 6 add residents California ders. toorcredit card % 5 Add signature. date, and expiration number, card include Visa or card on drawn U.S. or funds, Order Money national of total 50% add order. bypayment Inter Remit 20% add FPO, and U.S. APO orders,including o 28 BOBCAT I $15.00 II K R A M T A C B O B 2881 No. or C.O.D.'s.no cash Master Please, U.S.bank. o 7-T1 020 $7.50 0 2 .0 O B R E A 573-OT-1 No. $7.50 K A B U B A-3 4882 No. o 18-.. TZ $6.50 R O T $8.50 C A R T Z IT R 1187-O.T. No. R E P P O H S S A R G 11871 No. o 18 S $15.00 Y O B Y A L P R E P SU 1881 No. o 18-.. CK $6.50 L E G N A K IC S E M O H 1881-O.T. No. $7.50 IE IX P L L A N R A P 2882 No. $15.00 TR-260 3881 No. o 18-..STAHL' GYPSY $6.50 Y S P Y G 'S L H A T S 1287-O.T. No. o 181 LVER CLOUD $15.00 D U O L C R E V IL S 12871 No. h fyn i ehlrtn, n a you as and exhilarating, is flying The Combat is essentially, to the lay person, layessentially,the is to Combat Newcomers should be prepared should to spend Newcomers Beginners are best advised to start with to advised best are Beginners pn 0 Rdsge yPi Bernhardt. Phil by Redesigned 30" Span elc o 14 Cas as winner. Nats A Class 1941 of Replica E REIG NTUTONS INSTRUCTIO ORDERING NEW model with 26-1/2-inch span. F. Baecke.F. span. 26-1/2-inch with model A large-scale version of the popular OT popular the of version large-scale A semi-cantilevered-wing Rubber-powered in R /C for .90 4-stroke. Al Novotnik. Al 4-stroke. .90 for /C R in ihsetbla'izWn. er Rltz. Jerry Wing.' 'Ritz sheet balsa with Sal Gat cl oe o French a of model Scale Giant 'Small' The 1936 Outdoor Tractor was the was first Tractor Outdoor 1936 The Cook. John Design: power. .19-.25 for seat aerobatic craft. By Bob Benjamin. Bob By craft. aerobatic seat A stable yet maneuverable R /C funster /C R maneuverable yet stable A Large 'Could-Be-Scale' model of a of single model 'Could-Be-Scale' Large fn-lig 8ic igpn rubber wingspan 38-inch fine-flying, A aerobatic plane for Quadra. Don Hirst Don Quadra. for plane aerobatic oe fo 13. yJm Noonan. Jim By 1938. from model rubber power, in a new plan drawing. plan new for a entry in power, Wakefield rubber 1939 Stahl's Earl lm fr norue ByTony k. ak v yA n o T y B use. indoor for blimp eimfle, -/-ot og R/C long 8-3/4-foot helium-filled, A l, rmCehsoai. . Siroky. L. Czechoslovakia. from fly, An A-3 class glider, easy to build and build to easy glider, class A-3 An event, A M A fast combat. A good alternativefast A good event, A combat. M A to combat the slow premier A M toclasses A f h nvc fir u wih tl uses still which but flier novice the of theeventthat grasp an iswithin of speed a popularity,inisthe startingplace,growing bat plane, and uses A M A fastis rules. A This M A uses plane,batand 1960s stuntcom vintage .35engine, Fox a requires aVooDoo event, which "FoxDoo" distance as fast as distance possible. as event. ismeasured The task a to flyplane a h rprn fegns It'sgenerally not engines. of preparing the and airplanes of building the inexpertise planes thatplanes perform well. ml, eaiey ipe /A rt event proto 1/2A simple relatively small, to attract events new designed the novice. some on working been haveexperts speed event, though beginner's a as seen /A lns n mv u truh the through up move and planes 1/2A o 8-.. RELI E L B IA L E 'R L O 787-0.T. No. o 8-.. Ά’ S8.00 ’ Ά R E $5.00 E T E K C O R 687-O.T. No. P-30 W O L L A W S 6872 No. o 81 AT R3 $10.00 CR-32 T IA F 6871 No. o 47 NAKAJI 0 $5.00 50 A IM J A K A N 4872 No. o 47 LASER 20 150 $1Z5 200 R E S A L 4871 No. o 57OT S ' $4.50 ' Y N N E 'J 'S K C U R T S 587-O.T. No. $10.50 D O P Y A P 5871 No. o 57 ERLA 5 $4.50 5A A L R E 5872 No. o 37B $8.00 R E C N A M O R C E N 3871B No. o 81 $7.50 $9.50 Y T E E W S 2871 No. R E D N U O L F 387-0.T. No. L L E H E H T A H W 3871A No. $4.50 R E IN A R T N O S IN T S 487-O.T. No. o 27OT SKY EF $9.50 F IE H C Y K S 287-O.T. No. Speed: On the Speed: surface,On this is the simplest lse o cmeiin ag fo the from range competition of Classes of bit good requiresHowever,a task the nqe T okp Bray Wainfan. Barnaby hookup. DT unique version of Schoenbrun's winning design. winning Schoenbrun's of version le W-I o wn Jpns Navy Japanese wing low WW-II Sleek htgah, t. y rd Lehmberg. Fred By etc. photography, rgnl al kt ln fr 0 span 40" for plans kit Eagle Original Wing cores available. By Piotr Zawada. Piotr By Stunt. available. cores C/L in Wing Nats Polish '86 of Winner a with winner contest type wing Flying in mid-30's from fighter biplane Italian eo, 4 rbe sae TedSchreyer. scale. rubber 24" recon, pn vr 6 nhs B at Mooney. Walt By inches. 36 over Span aerial for V P R civilian span 7-foot A Swift. Jack By F.S. OS 1.2 scale. 1/5 From H^nry Struck's 1Trail scale /2-in. Struck's H^nry From lightplane. German scale rubber Jumbo lzr eis n ae 3' Fyn Aces. Flying '30's late in series Blazer R /C sailplane for single ch. Bruce Gray. Bruce ch. single for sailplane /C R Tharpe. Bruce By designs. /C R wing 96cbngsmdl itd y Idea) by kitted model gas cabin 1936 A Fruchtman. Pinky By Senior A "cabin." Class Nats winner, 1940 Place Second flying 1/2A quick-building of pair A n 97 Sa 6" B See Kowalik. Steve By 61". Span 1937. in electric 035 built easily and cost Low Davidson/Appel. By M.A.N. model scale '37 rubber from span 20-inch Rare r yi es By Mal m Abzug. g u z b A lm o lc a M y B s. ce A g in ly F m fro I pn twi r r s p ip sh r e b b ru r e d d -ru in w t span h c -In 4 2 LBUIDER E ILD U B EL D O M $4.50 through Class D, using .65-size engines at over 200 mph. There also is an event for AMERICA'S SAILPLANE HEADQUARTERS" pulse jet engines. One of the new events is Paraphase H LG ...... $ 29.95 C0VERUP! a "sport speed" using .21 engines and sim Ariel H L G ...... 2 9 .9 5 plified equipment rules. Ftiquito Primero H LG ...... 22.95 Scale: This is an event for those who like Klingberg Wing ...... 3 9 .9 5 Sturdy, high quality, rich dark to display their craftsmanship. The object is Paragon ...... 5 9 .9 5 green vinyl-covered binders for to build planes as much like full-size coun Gemini M T S ...... 6 9 .9 5 your valued copies of MODEL Ultima 128" wing sp a n ...... 225.00 terparts as possible, and to fly them as well. BUILD ER Magazine. Gold lettering The range of possible airplanes is limited Teios Slope Canard ...... 129.95 Slope Master (Flying Wing) ...... 4 4 .9 5 on spine and front cover. only by the number of different real air Slope D a r t ...... 5 2 .9 5 plane designs. R idge R a t ...... 3 3 .9 5 Fliers must be able to do some research Cheetah...... 42.95 and show documentation on the actual Super Cheetah...... 49.95 plane their model is designed to replicate. All Kits plus $3.50 Shipping · CA Res 6.5% Tax As in most competition events, however, the rules include several kinds of scale AMERICAN SAILPLANE DESIGNS modeling, ranging from profile scale 2626 CORONADO AV, NO. 89 through sport scale (models are judged at a SAN DIEGO, CALIFORNIA 92154 distance) and precision scale. LET'S G O FLYING Getting started in CL modeling is just like anything else worth doing. It takes a little work and study, but the rewards will be great satisfaction. Once you've selected the type of model activity that interests you, find that expert “Matched Performance System” One Binder...... $ 6 .9 5 helper, if you can, and get started. Take your for TO P P E R F O R M A N C E Three Binders ...... $ 1 7 .9 5 time to build a strong, straight, safe air K&B ENGINES plane, and find expert help if you can. Airplane Marine Five Binders ...... $ 2 7 .9 5 K&B FUELS K&B GLOW PLUGS (For more tnan 5, include Then get out on the field and practice, 9 Blends 4 Choices practice, practice. $ 5 .0 0 for each additional “Matched Finish System” As always, I invite comments, club news binder.) for B E S T A P P E A R A N C E letters, questions, photos, and any other in K&B FIBERGLASS CLOTH K&B Μισο-Balloons FILLER put from readers. K&B SUPER POXY RESIN K&B SUPER POXY THINNER Shipping: Binders shipped in U.S. by John Thompson, 1505 Ash Ave., Cottage K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS UPS only. For one binder, add $2.25. Grove, Oregon 97424. · For each additional binder add 75Φ. For K&B MANUFACTURING 12152 Woodruff Avenue binders shipped outside U.S., add Counter...... Continued from page 8 Downey California 9024 1 $4.00 for one binder. For each addi comes a spectacular color book of photo tional binder, add $1.50. For Air Mail graphs entitled let Combat, by Ian Black. can be used for tactical aircraft training. A rates overseas, please inquire. The author went up with a score of jet stunning book, it as well thousands more fighter pilots to record maneuvers, refuel devoted to aviation can be your simply by PLEASE . All payments must be in U.S. ing, and practice sorties, and came back requesting a catalog from Zenith Aviation funds, drawn on a U.S. Bank. with stunning photos of free world fighters Books, Box MB1, Oceola, Wisconsin California residents add 6% Sales Tax in the air. Many of these wingtip's-length 54020. · photos put you as close as you're likely to get to the supersonic fighters that prowl the Old Timer. . Continued from page 32 MODELS frontiers. You'll find RAF Lightnings, F-4 BUILDER Phantoms, British Aerospace Hawk T.Ts, F- come along in later years but Carl 16s, and more, all sharply photographed in Goldberg and his Zipper represented 898 W. 16th Street full color in this 128-page book. Also from Zenith is another in the Osprey the single most significant turning point Newport Beach, CA 92663 series of color books on aviation, this one in the history of gas powered free the venerable T-33 fighter/trainer, called flight. From that time onward, the Shooting Stars. Written by Michael O'Leary, competition endurance gas model be work on this touchy issue. Jake it contains 128 pages of full-color photo came a functional design in itself that graphs of Lockheed's legendary T-Birds. The P.S. In 1984, in the early aircraft develop no longer bore any but the most ele T-33, basically a P-80 Shooting Star con ment stage, Dean Roger broke a wing on his verted to a two-seat, dual control trainer, mentary resemblance to its man-carry Skybolt biplane. If this had happened dur has served for 40 years in USAF and Air Na ing counterpart. It could also be said ing the actual competition, should his bo tional Guard units. Now, in 1988, the T-33 is that the evolution was at least inevit nus have been raised to fifteen percent for being retired. To commemorate this plane's able, if not regretable! The modeler who three wings? years of service,the California and Oregon might focus his dissatisfaction on Carl * * * ANG s combined to create a T-Bird flight, for this should remember . . . the rule Dear lake: and this is covered in the book, along with came first, Carl was only finding a way The mechanic down at the Arco says that the T-33s variants seen in many locations, to make the most of it . . . · plain old Hypoid 90 weight rear end oil including that famous graveyard for makes a perfectly acceptable feedback pot America's older aircraft, Davis-Mothan Air Dear Jake. . . . Continued from page 7 wiper grease. What do you think? Base in Arizona, where we see many T-33s Cost Cutter in Corvalis prior to their dismantling for scrap. The fi become considered a biplane, and if so, do Dear Cost Cutter: nal chapter has a recent innovation: the ba you get the six-percent bonus for the snap I think your mechanic must buy his sic T-33 airframe has been made over by avi roll and for any other maneuvers you may servos from International Harvester. ation pioneer Russell O'Quinn into the complete before the airplane hits the Jake Skyfox, a sleek, good-looking aircraft that ground? The rules committee is hard at SEPTEM BER 1988 WHEN CONTACTING ADVERTISERS, TELL ’EM MODEL BUILDER SENT YOU! 107 IN THE BEST CIRCLES, ITS fiber skiver A PRECISION INSTRUMENT FOR THE DISCRIMINATING MODELER • Safe, Rear Draw-Bar Clutch Available in seven satin anodized handle colors: silver, blue, red, green, gold, black, & violet. • Precision, Instrument-Quality Materials Complete set in fitted hardwood case; includes • Strong-Holding Advanced Collet Design uber Skiver, together with two vials containing • Non-Rolling Hex. Cross-Section four No. 11, and one each of Nos 10. 12, 15, and 20 ...... • Deeply Knurled, Non-Slip Grip Individual handles (specify color) • Long-Life, Stainless, Vial of 6 blades (No. 10, 11, or 15) Surgical Steel Blades (No. 12 or 20) See your dealer, or order direct. Orders are shipped 20 First Class in the U.S. Add 10% of total order. For overseas air mail, including Canada & Mexico, add £ 50% of total order. Remit by International Money Order or U.S. funds drawn on a U.S. bank. Postage MODEL BUILDER PRODUCTS is paid on APO and FPO orders. Calif, residents add 898 W. 16th S t, Newport Beach, California 92663 6% sales tax. Dealer inquiries invited. NEW 6NHPIPCM Hell system with 5NLHIFM Heli sys m ixing, id le up, in tem includes mix vert and program ing, hover memory mable fall sale. and S130 ball bearing servos. DESIGNED FOR YOU. M Our Conquest Series systems And all Conquest Systems share the virtues of electronic include servo reversing, corn- superiority, reliability, ergonomic puter-built PC boards and design and value. Futaba NiCd power packs, men the similarity ends. Get more control with a Each Conquest System is de- system specialist designed tor signed with the understandingMtiKllUmti your kind of flying ana model, that every flying application has Conquest by Futaba. ftp own special requirements. , Jhat’s why there are seven n — ■_ Conquest Systems to choose r BBB from. Like the new Conquest & iH P that features tail rotor Futaba Corporation of Amen mix, idle up and other helicopter 555 West Victoria Street tissentials. Or the Conquest Compton, CA 90220 4NL, available with micro S33 ___ servos and R4H receiver for f ~~ 6NLK/FM 6 chan nels of Conquest SNLPIPCM brings system can b performance with contest features specifiedvrifk dual rates, SM8 tike Pulse Code mien servos, s e rm m fF M . Modulation and MH mien ro W/X/ittf also dual rates to for sailplane i available. sport dyers. ENYA’S PLEDGE OF PERFORMANCE The most significant advancement in model engine history Never before, and perhaps never again, will one allows for lighter weight, more power and better heat engine maker get the opportunity to change the way conduction. Combined with a chrome plating hard R/C hobbyists select new engines. ness of 700 Vickers or more, Enya engines run on and on, day-in-and-day-out. Experts will tell you this alloy THE ENYA PLEDGE OF PERFORMANCE combination has superior qualities. But they'll also tell Built to standards and tolerances beyond ordinary engines. Enya displays absolute confidence by supporting each engine you how difficult it is to make. But Enya takes the time with a unique Pledge ot Performance. We ask you to share our and has the know-how to do it. pride and urge you to measure your new engine's performance And that's not all. Enya uses computer controlled against its published specifications. To do this, break your machinery throughout the manufacturing process. engine in according to instructions. Then as soon as factory From casting to heat treating, machining, grinding, suggested break in has been completed, test it... we're so sure it will measure up to, or in many cases exceed published hard chrome plating, and honing the special alumi specifications, that Enya has backed your purchase with this num alloys, Enya craftsmen carefully monitor each unprecedented and industry applauded Pledge of Perform phase. It’s because of this advanced precision manu ance. If your engine does not meet the published specs prior to facturing, unparalled quality control and unique mate its first flight, Enya will repair or replace it free. Enya... the engines that inspire confidence. rials that Enya, and only Enya, has the confidence to put a performance pledge in with every one of its Taking technology to a new level engines. With it, Enya has provided you with peace of How are we able to do it? Through technology, mind never before achievable. You're assured that the materials and designs. Like the nitrogen gas hardened engine you bought will meet or exceed published steel cylinders in our Super Sport series. Cylinders specifications . . . no mean feat... no if’s, and's or made to a hardness of 400 Vickers . . . a hardness but's. few others care to match. And because of this superiority. Enya is able to put Or take our powerhouse 60XF with its Aluminum/ its engine through spectacular performances like Chrome piston/cylinder assemblies. This unique Enya the one seen on the following pages. alloy innovation is used by the aircraft industry and Enya's performance pledge.. . it's your assurance of quality. We hope other manufacturers will one day have the confidence in their product to join us in this major step forward. For maximum safety and enjoyment, follow instructions carefully. For complete details on the Pledge of Performance, call or write. l Enya Model Engines m ^ l t e c h MARKETING P.O. Box 286, Fords, New Je rs e y 08863 (201) 572-5792