John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC
Edition: Model Aviation - 1988/06
Page Numbers: 16, 18, 20, 22, 126, 128
John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC
Edition: Model Aviation - 1988/06
Page Numbers: 16, 18, 20, 22, 126, 128
John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC
Edition: Model Aviation - 1988/06
Page Numbers: 16, 18, 20, 22, 126, 128
John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC
Edition: Model Aviation - 1988/06
Page Numbers: 16, 18, 20, 22, 126, 128
John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC
Edition: Model Aviation - 1988/06
Page Numbers: 16, 18, 20, 22, 126, 128
John Preston Safety Comes First Training RC flight structors idea time has come wet tenna situation dis cussed Safe battery charging Danger wood dust Can en gine vibration switch RC off Flying alone Untested RC Scale models SAFETY CAMPAIGN couple weeks ago received letter Martin Dilly public re lations officer Society Model Aeronau tical Engineers SMAEthe British counterpart AMA manner similar AMA plan SMAE provides its members insurance coverage Martins letter stated during last three years received 81 claims policy two fatalities 1987 attributed model flying activities reported thesethe collision between hang glider RC Sailplanein Febru ary 1988 column As consequence acci dents SMAE has launched major safety campaign focuses RC Power fliers As part safety campaign SMAE will shortly publish manual use RC flight instructors According SMAE press re lease author manual John Long retired RAF flight instructor also fight er pilot WW II Following retirement RAF after 30 years service John worked consultant trained overseas air force per sonnel fly remotely piloted vehicles RPVs other words eminently qualified write RC flight instructors manual aimed instructor also has value newcomer RC flying Some previous columns have discussed subject formal flight training programs some RC clubs have seen need initiate am strongly favor such programs light steps taken British counter parts SMAE wonder should have sim ilar instructors manual available AMA technical director Bob Underwood now member four-man AMA Safety Committee other members Lee Webster Bob Brown Jim Sears have forwarded copy Mar tin Dillys letter its attachments Bob gether suggestion also consider making instructors manual available membership Jack Scarborougns Aqua Sport electric-powered floatplane suffers no ill effects RC oper ation dangling Its receiver antenna pond Theres wet antenna question column including comments George M Myers Before leaving subject SMAF safetyDanger Art reported account Ni-Cd batcampaign think should know sec-tery pack catching fire being charged ond death occurred Britain 1987 no means first time Ive heard result model flier being struck headsuch fire dont have details cir three-pound model coming acumstances surrounding incidents Fortu dead-stick landing doesnt add up lot ofnately reported Art battery pack kinetic energyhad removed model prior charg ing its owner alerted problem loud pop Others have lucky Im aware least two modelers lost homes because such fires suppose consider number batContinued page 18 Battery chargers recent letter modeler John Forbes Bordentown NJ drew attention article Art Schroeders RC News col umn February 1988 issue Model Air plane News Under heading Potential 16 Model Aviation column provided address Items concern regarding safety aspects model aviation activities Content column however opinion author does necessarily repitsent official position Academy Model Aeronautics 4fO AS VOU OCTO iI 34Y YOLk EAThE. Too MUCk WD DUST AMA MEMBERS THE ALL NEW 11th EDITION RadioContml Buyers Guide IS HOT OFF THE PRESS Hobbyists Guide World Radio Control have visited AMA Museum let Radio Control Buyers Guide take See eight pages full color models photo graphed AMA Museum plus much THERES NO OTHER SOURCE LIKE IT Thousands photos descriptions up-to-date information Aircraft s os Systems nes ware s Finishing Materials ssories Videos Dealers local hobby shop does stock copies Guide please send request payment $1495 $11g5 $300 postagelhandling RADIO CONTROL BUYERS GUIDE 14101 Parke CL Suite G Chantilly VA 22021 may use VISA MasterCard charge payment sending card number expiration date order tery packs must charge partic ular time compare number fires re sulting activity problem may ap pear minor other hand popularity electrically powered models both cars air craft has increased dramatically last decade fast charging has become way life Ive heard said some battery manufactur ers horrified high charge discharge rates impose products may point Im trying make like lihood battery-related fire appears increase So Im alerting conscious potential fire hazard associated Ni-Cd battery charging Meanwhile read ers has knowledge battery-charging fire would appreciate hearing himespecially aware occurred Wood dust Al Knight editor Clayton RC Club newsletter recently forwarded somber ar ticle AMA HQ reprint appeared January 1988 issue Woodthop News article written Tom Fraser newspaper reporter amateur woodworker Tom wrote article hospi tal suffering lung disease known ideo pat/sic pulmonary fibrosis attributed dis ease breathing dust resulting ma chining operations spatted wood Since have never before run across term interested learn spatting phenom enon occurs naturally number woods caused fungi eating downed tim ber practical purposes amounts decaying process process can result tractive patterns colors wood woodworkers find desirable wooden orna Continued page 20 18 Model Aviation AC PROTECI YOUR EYES IN COMFORT wmi NFORDADLE HANDSOME SAFElY GWSES vision important sense high-quality scratch resistant polycarbonate lens safety glasses must modelers Available clear gray dark green light green gradient mirrored gray lens Adjustable temples Wide view ANSI Z87l approved GREAT PRICES Iwast protect eyes style coaafest E Clear-5725 eaU Gray-$855ea LILt Green-$855ea DDk Green-$855ea DGlientMinvr-$1O5Oea NAME ADDRFSS CIIYIsrATEtzIP Send check nhomey order C&C Enterprises 141 Willa Dr Columbia SC 29209 SC Residents add 5% Sales Tax Carry Largest Only Stock ot Kratt Parts World alt alive working KRAFT MIDWEST ILL ILAr tX Authorized Warranty Service FREQUENCY CONVERSION $1000 Discount Regular Repair Mosi Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service rzi AU Shad Only Full Time Servicenler Midwest 117 East Main St Northvil le Michigan Phone 1 -313-348-0085 ITS GAS 020 & 049 CO2 Conversion Kits Motors FUN FOR ThE WHOLE FAMILY * 03 first place CO2 FF im Nationals * Lgal Pee Wee SOuSe * O2Dswlngs Ito 10 prop 5000 rpm * CO2 motor weighs 1% ounce. * MS swing 1014 prope 5006rpm * MS COa motor weight 2I ounces * Super thruatto weight ratio * Fully adjustable power aettinga * hwgeelnsoonda * Safetoflyindoors * Right time approx 2 mm tank shown * Multi-tank systams avaiL RIC use * Urn low-cost industrial CO Send aeff-adcfreuaed stamped envelope i 00 ordering InformatIon CARBONIC MOTORS Division Davis Dirni Development PO Box 141 Mllford CT 06406 L203877-16709- 530 M-F ments However during machining operations wood resulting cloud wood dust may contain live fungi may inhaled unless woodworker uses dust mask Like Al Knight believe likely balsawood use such copious quanti ties likely suffer spalting However dont believe good practice inhal ing foreign particles ones lungs can avoid As Al says Dust masks inex pensive dont already have stock disposable variety hand workshop suggest obtain some use whenever undertake sanding operations material wood fiberglass whatever Tom Frazer author Woodshop News article died September 1987before ap peared print cause crash Texas modeler Richard Barbosa sent letter last month al leges two demolished models run-off the-end-of-the-runway incident caused RC receivers battery switch vibrating Off position Although Ive never heard such incident Richards theories may have some validity claims four factors common three incidents 1 switch mount being used 2 switch mount tached thin less 1A-in thick fuselage side 3 switch mount close bulkhead 4 engine powerful mounted horizontally Richard believes above four fac tors must present problem manifest itself theory horizontal travel engines piston sets up vibration fuseContinued page 22 YOUR AMA NUMBER-2 HIGH computer cut PREMIUM FUEL PROOF VINYL decal ON ONE PRESS & PEEL STRIP letter number o PREALIGNED o PRE-SPAcED o PREPASTED Includes choice o 13 COLORS o 6 TYPESTYLES o UPRIGHT OR SLAM o CUSTOK LENGTHS free information lettering 1/2 high up please call write us * plus Post & Hand tax applicable VI NYLWRITE Custom Lettering 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 20 Model Aviation -9 FOR $300 YOU CAN GET CLEVELANDS GWNT MANY NEW FOR R/CtBUFFS Doejanod Iso Moot Fly ng Model Fe Bode-Up Plotolypo Poodle o Wood ond Pab6 Rep/icc Bet/dote Ues TbeteT/rore/c/eei Ye, New Hiotonoally ProBooted 87 Csrt JN4 Jenny $37 81 08 Mecqoile Rb $42 04 Pobber D7 Pr S39 lOB OH MeqsRonrb $55 70 Boyle Ge.Be $22 98 Steer PT17Koydet $5660 Hoetord Pete Rose $32 99 60 Soporeterirre 568 $24 71 ep trorirro 568 $351 95 63 Cert Hooek P-6E 862 86 96 Cert fleock P68 $541 64 74 Goolitele Ge 11 $48 72 95 Monosoope Sport $36 100 80 loll Spr Roildog $43 60 107 Aerenee C-2 Spt $35r 68 62 Hoenord Been Ike $45 59 78 Teret WW Roe $35 107 63 Cot Gekk P1 IC $42 69 94 Cer Cot/rb Ft iC $5491 62 liooMtMolligon $35 74 66 DoBee Cenret Roe $24 96 BA BeetMrMelligen 8451- 188 63 Boning P26A FIr $36 60 Rd Booing P26A Ptr $48 90 69 Weee C6 Cobb $36 75 64 Booth C17B Steg $38 100 WestI 4 Lyondot $69 96 Bonek C 17-B Slog $491 57 Ford Trinrtr 4-AT $36 * ' 55 Leek 11 Rlnetro $30 76 Ford Trintr 4-AT $48 82 Leek 11 Rlootro $60 114 Perd Tritttr 4-AT $65 62 Otinee 7/00 SR7 $18 96 Bollonee Airetol 540 81 Otinoe 1/00 SR7 026 93 Loolog C-2Anpk $69 122 Stinsot T/W 0R7 838r 58 Groin J2-P Goele $31 e4005 59 Bristol Fir P2-B $20 78 Greet J2-P Docip $56 118 Britol FIr P3OB $45r 124 Look Air Repro48 74 Torner Potee $45t- 62 Leek Air Repro. $26 56 Cot Werhk P-dO $2683 Leek Air Reproo $36 60 Vegt Coroir P40 $35 77 W-Wrn 121 RedI. $4880 VogI Ceteoit P40 $69 63 C Sookeock P7C1 845 78 Leek Liglttn8 P28 $38 94 C Soekeonk P7C1 $57 56 BopSee-Bee Aet 524 108 SileorS-38 Aetpk $69 74 RepSee-Ree Aet $39 60 Boeing 100 Sport $36 * 70 Pipor J-3 Cob $29 90 Booing 100 Sport $49 106 Piper J-3 Cob $39 72 Nertkrep Geetete $48 9Bloek Bodon Beth $38 96 Nerrbroc Goetete $75 63 Greet P69 BelIed $28 90 SbnA Leon a/M 856 77 Boeing 8-170 Port $35 60 StiesA [eon 3/M $42 103 $ee B-17G Port $55 120 OtinA Lee 3/M $82 68 WestI Wlrirloeled $32 7$ ConolCotPBYSA 042 68 N Aeter Noelen $39 104 Con Cot PRY SA $56 68 BBenoeoo V-Toll 539 65 M Ck no C opet 065 77 Lecoetb Sodon $20 979/ Cb no Clipper $75 72 NA B-25 Beetbor 049 62Cc NC 4$59 65 MMnreoder 8-26 $49 94 Cort. NC 4 $69 ore peter etoiconee 00-cone ore etone rUeo4. Over 1200 Or/tot 6 -73 Pett. mel 50o Op Add 10% oil erder thippieg & in. etc USA Cee & ABeo Bltnonker its 15% /2576 olti Pieteriol ontolog 3355 Peeled. Price [lot P15 lir Onotion olene $100 ICky elt foreign odd $100 LEVELAND MODEL&SUPPLY Co 380000 e teooemnengoocnc-o sole 080. SIne rote183071 0170010 AVR CLEYRLAND OHIO 46180 tnoeocercn I030or retp SOOn 10401081 eooo B lage side because damped presence bulkhead transmits switch mount switch causing switch vibrate Off position Wet antennas March 1988 column pub lished excerpts readers letter concerning radio glitches alleged result receiver antenna contacting wet grass grounding radio Upon publication column received four letters commenting allegation three disputed could happen Jack Scarboroughs letter accompanied color photograph very pretty Aqua Sport floatplane powered geared Leisure LT-50 electric motor operated seven-cell 800mAh battery pack Ive included photo months colunsn Although may dis cernible photo printed magazine original print clearly shows re ceiver antenna dangling water New England lake Jack has experienced glitches setup Another letters George M Myers say read about wet antenna problem expla nation attributed George Myers March 1988 column thought might like little background dont remember particular conversation Ralph Pearson remember learned about phenomenon flying Helicopter time common practice let antenna dangle below machine can anticipate rest Thankfully problem rare have seen literally hundreds Helicopters operated way problem have Continued page 126 DGA Designs es OGA e gns 0 0 o IiI 0 0 C QUARTER SCALE PLA o 0 DAVIS DIK SOS Span Quadra 35 power elmilar. ppo - 1933 KINNER SPORTSTERs25 S Modal K.117 Span 035 power _______ 0 4-CYCLE PROJECTS I RON FUNK 18 Seol0 00 open sino4 4 cYcle. pantoetlo Flyer IppO ____0 DAVIS D1Kee 603 Span.I 45 4cyclesn-tilar..proD Sisop -Tine 1008 00010000 Sloth 00010P 1933 KINNER SPORTSTER8 Modal K.78 Span. Bl-75.4cy roo Si 50 RB PhOto redocod oor 14 6010 91000 Toes 1008 0010 Otto Sloth 0010 ________0 MOre O83 P10000 ootttleg C PHOTO DOCuMENTATION PACKS available- on Scala Plans Complete wleetrcotlOn nooklot ALL PLANS ROLLED SHIPPED ups Send 8100 Catotlog t New York 680 Plooldento 066 7% 500050. Send elceols fl Ma.. COfle. AllOet 3 weoko br 08000 ole S U iju ml UcI i 22 Model Aviation Al Radio South Batteries 500 ma Pack 48V1100 Futabaconn1350 800 ma Pack 48V1950 Futaba conn2275 1200 ma Pack 48V2100 Futaba conn2425 TX batt Futaba G-Series orPCM2450 RADIO SOUTH AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Featuring fast service bybO__ qualified people the- latest equipment inciuding SPECTRUMANALYZER-- Frequency Conversions Kraft$40 FutabaAM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heti Sets Gyros Orders COD VISA MC Ship Charges Only Prices subject change notice OPEN 8-5 CST904 478-6745 43 West Nine Mile Rd Pensacola FL 32514 Letters Editor Continued page 10 came home night sent away set plans Douglas Skyraider Cal used event told wanted win plane what needed forget now sold plans followed Cals advice following year met again oaly time also Skyraider just like took look plane gave big handshake withdrew plane event helped allowing win day happiest kid New York Cityonly because Cal kind guy article about him fantas tic remember him well could find other set plans would build another Skyraider Just him Jim Meilde Peekskill NY WRAM Show/Myers Continued page 14 narrow-band line aircraft Vanguard AM system being dropped 5 The high-quality Airtronics CS-2P FM XL-2P AM pistol-grip wheelsteered radio cars boats 27 75 MHz 6 The entry-level two-stick Vector VT 2R reversing switches VT-2S no switches dry-battery Ni-Cd AM sys tems 7 The entry-level Vector VT-2P pistol grip AM system dry batteries Ni-Cds 27 75 MHz cars boats Just down hall Cal Orr display ing Custom Electronics line Cal has al ready received FCC Type Acceptance 72/53 MHz redundant radio module Futaba G-series transmitters await ing approval 72/72 MHz version Airtronics Module series described Cals redundant radio systems Ra dio Technique column August 1986 July 1987 Model Aviation module will permit fly airplane two RC channels time affording greater se curity interference in-flight failure such components battery packs switch harnesses receivers form insurance can decide whether need based esti mated cost next crash Also shown external throttle servo controller permits make engine adjust ments operating RC transmitter Bill Charlie Cannon present Cannon narrow-band micro sys tems including miniature narrow-band single-conversion AM receiver shown last year tested orange-box AM transmitters show sidebands down lower 60 dB Hundreds have sold RC38-RC56 per formance has good available year RCl6-RC34 well Bill has congratulated persistent pursuit smallest lightest RC system tiny Cannon radios show good performance high reliability people will speak ill have never owned Futaba JR did attend show cant comment new offerings rest show usual bee hive looking buying selling fewer video presentations year seemed Byron Originals Inc RC Video Magazine usual crowd builders also saw videos boats cars planes Saturday crush made wonder about fire laws everyone good mood tolerable didnt see acting nasty usual long slow lines buy food drink Patience good humor rule day Safety/Preston Continued page 22 few RC systems adversely affected gets attention cant say radio manufacturer model number will exhibit problem because way arrange servo battery leads has strong effect Im quite sure advised Ralph rear range wires try again before sending system back service department re pairs kind problem can drive service men crazy because hard replicate dont accidentally get servo wires bad arrangement cant demonstrate problem everyone concerned left unsatis fied message clear Rearrange rats nest fuselage before blaming radios de signer builder Thank George Before leaving subject word caution about rearranging rats nests fuselages first Scale model entered sanc tioned contest Piper J-3 Cub Sig kit won its first contest building model made attempt prevent ing tail-heavy As result CG thing little too far forward flew way number months came con test Id have won fact threeturn spin downgraded because first turn wasnt really spinning next day took model work lunchtime flying session time worked Department Transportation building formerly occupied Erco builders Ercoupe lightplane Riverdale MD 1500-ft abandoned macadam run way outside office door enjoyed job lo cation Anyway particular day decided re arrange rats nest wiring fuselage before first flight see could move CG slightly rearward order achieve positive spin entry So reached fuse lage stuffed battery pack rearward under servo tray Takeoff nonnal first few min utes flight warning 126 Model Aviation altitude about 200 ft realized absolutely no control whatsoever model went left-hand spiral dive resulting impact macadam runway drove OS 30s crankshaft Out through rear crankcase cover turned model yellow Cover ite bag balsawood Also GI Joe pilot lost headbut lived fly again Other having stripped gears servos radio functioned flawlessly after crash So theory about loss control partially disconnected receiver battery pack stuffed rearward tempt shift CG time didnt bother tape radio connectors engine vibration took care rest disconnection So never did find out whether rearward CG shift would have improved J-3s spin entries did learn secure connectors tape fu ture models fly alone fly alone number readers sent letters commented Plane bites man story March 1988 column concerned incident modeler struck seriously injured own plane advice also Never fly alone Apparently lot out dont subscribe advice Most seem feel because no flying site wont suffer injury loss model because someone elses mistake Similarly mistake does jeopardize someone elses safety may true being hit model frequent cause injury Feeding fingers through own models prop com mon cause injury Driving car hand easy may impossible other hand being used stop flow blood Flying untested Scale models recent letter Del Rykert Batavia NY expressed con cern about numerous occasions wherein has seen modelers enter Scale contest model hadnt tested airworthiness Del asked opinion prevent such flagrant violation safety Unfortunately didnt have simple solution offer Del thinks Scale modelers reluctant test fly new model prior entering contest cause want save static judging such case suggests solution may reverse current order judging such fly first have static judging last As stated response Del dont have good feel prevalent problem Thats Im mentioning asking input Scale modelers have real safety problem untested models being flown Scale contests what solution MariahlTriebes Continued page 33 ing point may wish adjust bal ance fit own flying style come accustomed Mariah Sailplane likes fly fast smooth Mariah has full aerobatic cap abilities extremely stable aircraft speeds swept wing keeps plane highly stable during slow flight slows down very well landing need spoilers flaps said done impor tant thing have funand some exhilarating slope flying Ive experi enced has little Sailplane Mariah may best Soarer Ive ever flown shes definitely right up first rank Try yourself youre bound agree Radio Technique/Myers Continued page 36 can accurate enough find transmitters outside AMA frequency tolerances comes measuring power levels really isnt good enough installing Gold Silver stickers paragraph 322 AMA Guidelines requires spectrum analyzer used purpose think ICOM good enough reveal illegal crystal swappingand Contest Director really wants know about RC Giant Scale/de Vries Continued page 41 bewildering Some efficient othersthey convert same amount gas glow fuel power per cubic inch Thus some installations may able get away smaller engine just because efficient others its displacement range too hobby shops distributors carry available engines engine choice may depend availability cost factors other considerations proper propeller can make break spe cific engine great prop efficiency viewpoint may turn competent engine raging tiger Flight altitude included list engine choice factors primarily because its BIG amongst us Rocky Mountains Just cause fly altitudes 5000 7000 ft above sea level know going lose 20% engines power before props spun Conversely fly sea level en gine going put out its full power Since concerned scale outlines ten engine choose determined de sire keep within confines cowling best criteria lot us dont like bunch iromnongery disrupting scale lines models Hence inclined choose physically smaller engine might appropriate power-required view point Finally often consideration brand loyalty weve successful product particular manufacturer dined buy another engines Nothing wrong criterionas long favor ite manufacturer produces range power plants Andyou can choose suitable model Engine choice very personal thing can listen pronouncements experts theyre frequently right can follow rec ommendations models designerafter hes flown model specific engine size push comes shove youll have de cide engine use youll have early building sequence Itll take lot thought consideration final note may interest movers shakers AMA clubs IMAA chapters Jim Jennings Jennings Trophy Sales PO Box 1121 Hendersonville 128 Model Aviation ZIVIA Name Street Addreas City StateZip HoWW RNATIONAL INC