Radio Control Helicopters Larry Jolly HOLD IT As some know new Emergency Rule has just proposed Horace Hagen Chairman RC Helicopter Contest Board approved John Grigg AMA President calls elimination metal weights added tail main rotors also prohibits metal knife-edged main tail rotor blades Under standard Con test Board Procedures Emergency Rule action must validated Con test Board vqte must occur no earlier four weeks after ruling published AMA publication case appeared August 1984 Competition Newsletter under heading Safety Rule RC Helicopters Nats page 112 later six weeks after publication Con test Board receives 10-day-turnaround ballot whereby may approve dis approve Emergency action Editors note See months Competition Newsletter action rul ing want speak out situation issue Model Aviation will reach modelers before voting period begins can contact AMA District RC Helicopter Contest Board member name address appear Compe tition Directory section Compe tition Newsletter portion issue can also contact RC Helicopter Contest Board Chairman AMA Presi dent John Grigg want Please bear try explain thoughts new rule think should tell RC Helicopter Contest Board defeat its adoption Metal-weighted rotor blades illegal AMA competition Thats right guys Taking advantage recent joint meeting between AMA Executive Council chairmen Contest Boards Horace Hagen John Grigg introduced supported insertion FAT definition rotor blades making illegal run type blade AMA competition classes FAT rules states Metal main tail rotor blades forbidden Knife-edge leading edges forbidden main tail rotor blades No metal rotor blades perI mitted except blade attachment point Emphasis added read no further end rule sounds like common sense right WRONG Start reading between lines around rules youll see poorly passage thought out before go hows whys rules legislation lets see anybody would want ballast rotor blades first place ballast blades would venture say Helicopter fliers reading fly main rotor blades tail heavy blades have center pressure pivoting axis ap proximately 30% mean chord have balance point center gravity aft pivoting axis farther aft blades center gravity pitchContinued page 160 Larrys stuff TV Above L Condor ABC pilot same name computer-controlled drone reality modified Kobe Kilco gas-powered Robertson R-22 model uses KK fiybriesa rotor head blades Scalelilce appearance model Hughes comes flybariess rotor headwhich will no longer usable new No metal weights rotor AMA rule goes effect Larry has lots say about column also see R Above Condor chasing bad guys down Los Angeles River Camera crew just out sight left Condor flying about 45 mph right Death Condor An on-purpose crash Throttle Hold ON full negative cyclic pitch 20-ft altitude gave spectacular crash Three movie cameras running left has cameraman 56 Model Avitinn Another Larrys Air WOlf choppers under Hirobo Hughes 500 shell Schiuter Heiboy mechanics Rotor uses Schiuter-type flybariess control rotor blade has ounce lead Its tip model spun tree Russian forest Converting Gb En gines Ignition has advantages such Savings cost fuel Less oily mess no Plugs burn out Use boats Cars Planes helicopters Can adapted Larger engines place Flywheel Thus saving weight No machine work voiced needed screw driver drill Most available Gb en gines can converted features yours won new rn iI6IJ5IL MAKK LDlTwo four cycles pointless sstens no points worry aboutTwins etc unit comes predrilled disk sensor formed clamp mounting sensor engine Complete instructions convertion timing procedures in- Complete cluded Unit operates 48 v Low current drain Weight 2 ozs size 2 x 2 x 75 System inches needed complete system Ignition coil spark plug on/off switch available separately complete system fuel 69 95 ignition lines included No ba e es nc uded State engine size use ordering FABTRONICSCash M 0 Certified Check plus $300 postage handling 15860 Via Riverapersonal checks take time clear Calif residents add tax San Lorenzo CA 94580 Brochure $1 00 refundable purchase label capacity 72 ampere-minutes 12 Ah behavior ter minal voltage during charge think battery could actually hold charge voltage did rise usual values experienced during digital charge Now much-used battery Notice second test cycle brings right up about best can warmed up faster brand-new pack Con tinuing testing now see some funnies fourth cycle results say battery delivered put course cant believe l06o output result some cell imbalance ie some cells probably 4 x 10 ampere-minutes result previous cycle cutoffs being determined some weaker cellsthe better ones did get sufficiently discharged battery empty recharged Anyway numbers may some what error basic message good cared-for batteries can facili tate lot top-quality flying As now move up fifth cycle something different seems taking place apparent charge return per centage seems decreasing substanti ally Notice also end-of-charge terminal voltage rather highmaybe past peak though battery likely certain its cells fully charged sixth run tends confirm suspicion attempt put charge battery produces same discharge ampere-minutes fifth run corresponding lower output/input percen tage venting well Good griefone precious cells actually vented Oh well anything science No isnt first time Ive popped sorta knew gonna happen fact quite warm overcharged pack quickly cooled put back use out suffering much far can see preceding test data evi dent can expect recover nearly battery charge within limits both new well-used well-caredPIANUT SCALS MODELS Kits $595 ZEROMILES M-IB PIETENPOLDRUINE PIPER CUBCOUGAR ANDRESONGIPSY MOTH MUSTANGLACEY M-IOGANAGOBIE jjjjrjWstmd PRAIRIE BIRD 4 KIT $595 SPORT MODELS BABY ACE $649 ONE NITE 28 ONE NIlE Ic 9595 STRINGLESS $495 PECK ROG RADIO 3 LIMPS CONTROLLED Ii and 13 FOOT LONOKITS OR READY TO FLY NOW IN TNREE COLORS ORANGE YELLOW LOW PRICES CATAIX No 25 $150 Pck-Pelyauers PN~l9 4424638 469-8615 L BOX 2498 MA LA MESA CA 92041 batteries Also assuming used originally just like new apparent battery capacity decreases use case looks like about / original capacity remain ing bad considering 300 flights Surely battery does owe anything its still usable Taking look terminal voltage during discharge last cycles both batteries see terminal voltage heavily-used pack notice ably lower new pack little voltage can make big difference mo tor power Im sure plane would show pep longer period new battery However Ive decided leave pack place perhaps rerun tests after another hundred flights just see what happens point rest case properly cared-for batteries can last hundreds flights Please note Im saying same wouldnt true batteries have digitally charged hundreds timesthe fact simply dont have therefore cant tell question whether lessthan-maximum charging good Ill simply redirect attention April 1984 issue page 42 flight histograms plane very bat tery tested show hundreds data points averaging out about 13-minute flight times Period Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC HelicopterslJolly Continued page 56 sensitive rotor blade Normal blade construction calls hardwood leading edge balsa trailing edge use hardwood important two reasons first gives necessary blade attach ment point second attempts balance rotor blade closer pivoting axis Rotor blades airfoil has its center gravity too far aft pivot point likely flutter commonly seen all-flying tailplanes used RC sailplanes rotor blades too werent Hiller flybar-and-paddle system transmitting necessary aerodynamic dampening rotor system machines would quite unflyable out going too far aerodynam ically speaking flybarless Bell-inputonly system used Horizon Kobe Kiko R-22 must have center-ofgravity-corrected rotor blades perform properly Without flybar aft center gravity first control input would send blade oscillation might never come back equilibrium oscillation would course negate control inputs rotor system Helicopters flybars fly 160 Model Aviation better CG-corrected rotor blades Full-size helicopter blades have spars located near leading edges may also use lead ballast correct centers gravity now see center-of-gravity-cor rected rotor blades good idea blades normal construction will re quire additional ballast balance proper ly course models use flybar less heads will now obsolete can no longer put metal blades cor rect centers gravity make flyable first glance thats way looksbut remember said rule poorly thought out Lets look build set CG-correct ed blades Method construction CG-cor rected blades two best examples GB-corrected blades now market Horizon blades Kobe R-22 blades Both methods offer usable blade highly unlikely release lead missiles contact ground R-22 blade looks like RC Hel icopter blades except three slots milled leading edge blade slots approximately % x 3 equally-spaced outer third rotor blade slot completely milled through bottom sur face slot forms pocket 15-gram about A-oz lead weight lie snugly place three lead slugs merely epoxied place blades covered money type con struction far safest produces rotor blade will break contact limbwhether oak tree legand very likely lead will stay put broken blade hurt anyone know lead will stay put Well Ive broken some R-22 blades can tell break Remember said blade weights located outer portion blade done because further toward tip ballast located greater moment arm through does its work lead far ther out takes less get done Likewise heavy tip strikes object ballast applies leverage toward center blade causing shear point form allowing tip blade break off flutter ground So think FAI rule poorly written FAI Legislation Bouzo Goes Paris Youd think country belongs FAI would send its greatest modeling minds ClAM meeting right Wrong Some peo ple meeting havent flown model 20 yearsneedless say theyve competed time either fact may vote RC Helicopter rules may never have seen fly Far-fetched think Let give example modern FAI thinking FAI Soaring known F3B period time 1976-1979 Austrian AME group busy kicking everybodys tail Europe model known Dassel just happened Dassel very pointed nose 1979 ClAM meeting somebody decided fix AME group Under guise safety proposed consequently passed proposal F3B Soarers would have minimum nose radius 75cm Cl Now want imagine being receiving end eight-pound Sailplane doing 110 mph As lie grave can contemplate im agine much better feel model larger nose radius might well have passed rule said will disqualified contest Sailplane strikes kills fellow competitor Whats wrong FAI Helicopter rule major problem lies state ment No metal rotor blades permitted except blade attach ment point dont have use metal ballast blades can use some other substance some organic byproducts petroleum come mind have density less metal used larger amounts can come up same mass sake argument lets say some has developed plastic 1A Fine Quality Flying Models C 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 4 4 4 4 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 September 1984 161 Catalog $150 -J $75 CI sets erage laili eacn Ave na Dei CRcFCED UP Get back air fast Sig fuselage wing kits Sig kits have replacement fuselage wing kit plus other kit items repair model including cowls wheel pants turtle decks canopies wire aluminum landing gear decals much much prices see Sig Catalog order send check money order Sig Mfg Co Inc 401-7 So Front St Montezuma IA 50171 Phone 1-800-247-5008 orders within United States excluding Alaska Hawaii Iowa 515 623-5154 IEu FLY THE BEST FLY SIG dense lead modeler needs enlarge pockets R-22 blades three times grind plastic up mix epoxy voila has CG-correct blades have possibility releas ing missiles just deadly metal ones Worse yet adoption encourages use denser hardwood leading edge rotor blades well glass fiber comosite rotor blades event accident two types blades really think safety standpoint youre going come out better think just introduce rule states competitor breaks blades will eliminated competition am anarchist Rules neces sary poor rules worse no rules believe rule has cer tain implications future contestants rule proposed should passed well thought-out does stifle technology creativity future modelers believe better situation would have Helicopter Contest Board find acceptable method installation ballast publish AMA rule boormuch done descrip tion acceptable single-blade propellers CL Speed can turn new Emergency ruling around About month time read article ruling will brought before Contest Board adoption rule book dis agree adoption FAI definition rotor blades AMA competition either tell Contest Board about send views Ill see get right people BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon RacinglHage Continued page 57 trial balloon did prove quite successful other brands seemed have little effect times best times turned Master Airscrew plastic 9-6 about 17000 rpm Zinger Regular 9-6 Progressive Pitch 9-46 9-6 Power Props did well race didnt get started until 130 pm due continued possible showers did racing very close very fast particularly first race year Due fre quency matrixing three-plane heats necessary 50 heats plus two fly-offs completed little over 5 hours no reflys two crash es both No 3 pylon Dave Keats Mike Lasker Billy Johnson finished five rounds perfect scores provided exciting fly-off Dave taking marbles 162 Model Aviation Frank Baird novice won CAPS fast time award race results follows Times given two best fast times 1 D Keats 20 Pt 148/150 2 M Lasker 20 pt 148/150 3 B Johanson 20 pt 153/153 4 W Yea ger 17 Pt 154/157 5 B Pence 17 pt 153N/201 6 D Cohen 17 pt 155/ 157 7 J Cohen 16 Pt 152/153 8 J Kilsdonk 16 Pt 154/155 9 T Kwiat kowski 15 pt 153/157 10 B Hisey 15 pt 155/200 11 Merlino 15 Pt 158/159 12 R Morgan 15 Pt 158N 204 13 F Johanson 15 pt 159/201 14 J Krauer 15 Pt 200/ 200 15 Apaza 14 Pt l47A/155 Almost club country has some sort inner club competition would pretty boring belong club did anything So clubs gener ate some sort activity would bet time another almost clubs hold some kind race Whether Hand-Launched Gliders AAs Sport Pylon just about anything else can race some sort racing just about us have involved racing long time have seen areas have races almost week have seen same areas get burned out go 15-20 races summer down four five What happens Stop think about such thing too much left usually blame something elseusually lack inter est. Well knew just much competition still going local clubs know read newsletters sent AMA So what Well dont just sit around crying about itdo something about Promote racing Dont cancel race just because dont think will have good turnout will nothing bury racing event got started racing living Ohio Formula racing just afterthought Usually thrown end Pattern event just some added fun Nothing serious order get good races drive 300 500 miles So started promoting racing area went clubs never put Pylon Race before got Control Line club sponsor put race wasnt easy slow going first Usually would have Sport Pylon Formula would have maybe 15-20 sport 6-10 Formula Ones would get five rounds event day usually Sunday way would have spend night Along came Quarter Midget helped little new less expensive drew lot people racing moved Ohio Texas Continued page 164 Clevelands Gian$,PIas MANY NEWI FOR R/C BUFFS Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CO QUALITY * MASTER MODELS PLANS 54 SD Derrro,Ile 21 $48 ___ 7RConoICoIPBY5A$42 72Cor 02U1 4 L&S 104 Con Cor PBY5A $56 62 Honoord Roon 1k $40 96 Wrighl-NooyBooe $48 77 Rong $ 1 7G Fort $25 # 52W-Wnri2i Bed LS26 103 77W-Wnri2i R64 154868 D 84 Fokkr 07 FIr $39 108 60 Rorord Per tore $32 60 705071C Go-Boo $32 90 Roe ISO Sport 60 Soporrrorine S6B $24 90 SI,, Lono Wns $56 oporrrrorin S6B $32 80 Morfin 74 TAM-i $39 62 Con Honok P-6E $42 75 H-Ps 0400 torrob $32 94 CorHook P6E Fir $54 100 H-F8 0400 Boor $49 ~F' 62 Locklred V5 $24 65 MCiono Clippr $55 7 74 DoojIll, 0-B ii $42 97 MChno Clipper $75 93 Monooop Sport $54r 68 W,6 Whirlwind $24 80911 Spr Boildos $43- 68 Oyon Noojor$39I2$ 107 Aroooo C-3 Spr $30 68 OBonono VToil $39 61 Dooslo 0-28 Ok $32 77 Looorrrho 54, $25 22 Dooglo 0-2806 $49 72 N Mjioh Borob $49 ose Con tt 545- 65 MMoroodr B26 7i Morlin RiO 5ornb $29 81 OH Moqoiro Rb $42 7RTornerS W-W Ron $32r lOt DH MoqoBonok $55 r Oofrk Fi1C2 $39 98 Sror PT17Koy4i 94 Cor GofrIr Fi 1C2 $54 99 NBlk Widow F6i $69 66 09, Coorl Ro $24 7i Doog DC-s Tron $32 63 HowMrMollison $35 95 5 94 HoonMr Moth0, $45 86 H 63 Boeing P26A Frr $36 08 Cor0201/4 L&S $49 84 Boeint P26A Fir $48- 60 Dooglo M2 Moil $24 69 Woro C-6 Cobir $36 68 Brilol Bolidos Fir $30 64 teeclo Ci7t Slog $28 59 BronontooMLA $54- eof Ci 7-B Srs $49- 107 Grow Beorol FRF $54n 55 Look ii Elootro $30 73 Trorel Air 6000 $24 8 82 Look ii EI,rro $40 i07 Mon MB-I Boor $44. 62 Siioo 7 W 5t7 $16 91 Lirrdbrg NO211 $39 81 Siinon T/W 5B7 $24 108 FoirclrPTi9 Tr 123 Slinon T W SR7 $38 90 Woo Toper-Win8 039 39 Briiol Fir P2-B $20 75 WeiId Lyonder $33 Briiol Fir P2-B832 100 Woild Lyonder $49 lit RriloI Fir P2-B $45 57 Ford Trirroir 4-AT $2t 4TL Peoo Speo $45 76FodTori 4AT $45 63 Skyrooloel XP3P-i $20 114 F 4 T ml 4 AT $59 6 Cor Worhk P40 $24 84 8 ioyoe TFJ 2 $56 Look Lisfoing P38 $38 93 ben n C 2Aorpk $69 56 t9 Seot Aw $24 58 DroorJ2F Dook $29 4 topSeo-B Anoph $39 78 GroorJ2-F Dook $56 106 Piper i-S Cob$39 59 Gorfro G1V torn $52 8 Look Hod, Bork $28 117 Gorho GiV Room $39 63 Grow F6F Helloor $28 68 Bron-Winlmle Bird 045 55 torh Boky Boll $24 54 Con Twill XF934 $28 Nor Sold Thro Dolor Frioo,okleoi olmong Goor 1200 Orhor 6 1 2 Foil Irol 500 Op Add 10% oil order frippirg & in, err lo USA Cor & Eloowboro ii 15% 25% ky oriol oololog $200 inolod, Polo Liell Frire l,l H ~O ,o oon Si MODEL&SUPPLY LEVELAND iosoie OBOCOIT AVB CLEVELAN
Edition: Model Aviation - 1984/09
Page Numbers: 56, 160, 161, 162
Radio Control Helicopters Larry Jolly HOLD IT As some know new Emergency Rule has just proposed Horace Hagen Chairman RC Helicopter Contest Board approved John Grigg AMA President calls elimination metal weights added tail main rotors also prohibits metal knife-edged main tail rotor blades Under standard Con test Board Procedures Emergency Rule action must validated Con test Board vqte must occur no earlier four weeks after ruling published AMA publication case appeared August 1984 Competition Newsletter under heading Safety Rule RC Helicopters Nats page 112 later six weeks after publication Con test Board receives 10-day-turnaround ballot whereby may approve dis approve Emergency action Editors note See months Competition Newsletter action rul ing want speak out situation issue Model Aviation will reach modelers before voting period begins can contact AMA District RC Helicopter Contest Board member name address appear Compe tition Directory section Compe tition Newsletter portion issue can also contact RC Helicopter Contest Board Chairman AMA Presi dent John Grigg want Please bear try explain thoughts new rule think should tell RC Helicopter Contest Board defeat its adoption Metal-weighted rotor blades illegal AMA competition Thats right guys Taking advantage recent joint meeting between AMA Executive Council chairmen Contest Boards Horace Hagen John Grigg introduced supported insertion FAT definition rotor blades making illegal run type blade AMA competition classes FAT rules states Metal main tail rotor blades forbidden Knife-edge leading edges forbidden main tail rotor blades No metal rotor blades perI mitted except blade attachment point Emphasis added read no further end rule sounds like common sense right WRONG Start reading between lines around rules youll see poorly passage thought out before go hows whys rules legislation lets see anybody would want ballast rotor blades first place ballast blades would venture say Helicopter fliers reading fly main rotor blades tail heavy blades have center pressure pivoting axis ap proximately 30% mean chord have balance point center gravity aft pivoting axis farther aft blades center gravity pitchContinued page 160 Larrys stuff TV Above L Condor ABC pilot same name computer-controlled drone reality modified Kobe Kilco gas-powered Robertson R-22 model uses KK fiybriesa rotor head blades Scalelilce appearance model Hughes comes flybariess rotor headwhich will no longer usable new No metal weights rotor AMA rule goes effect Larry has lots say about column also see R Above Condor chasing bad guys down Los Angeles River Camera crew just out sight left Condor flying about 45 mph right Death Condor An on-purpose crash Throttle Hold ON full negative cyclic pitch 20-ft altitude gave spectacular crash Three movie cameras running left has cameraman 56 Model Avitinn Another Larrys Air WOlf choppers under Hirobo Hughes 500 shell Schiuter Heiboy mechanics Rotor uses Schiuter-type flybariess control rotor blade has ounce lead Its tip model spun tree Russian forest Converting Gb En gines Ignition has advantages such Savings cost fuel Less oily mess no Plugs burn out Use boats Cars Planes helicopters Can adapted Larger engines place Flywheel Thus saving weight No machine work voiced needed screw driver drill Most available Gb en gines can converted features yours won new rn iI6IJ5IL MAKK LDlTwo four cycles pointless sstens no points worry aboutTwins etc unit comes predrilled disk sensor formed clamp mounting sensor engine Complete instructions convertion timing procedures in- Complete cluded Unit operates 48 v Low current drain Weight 2 ozs size 2 x 2 x 75 System inches needed complete system Ignition coil spark plug on/off switch available separately complete system fuel 69 95 ignition lines included No ba e es nc uded State engine size use ordering FABTRONICSCash M 0 Certified Check plus $300 postage handling 15860 Via Riverapersonal checks take time clear Calif residents add tax San Lorenzo CA 94580 Brochure $1 00 refundable purchase label capacity 72 ampere-minutes 12 Ah behavior ter minal voltage during charge think battery could actually hold charge voltage did rise usual values experienced during digital charge Now much-used battery Notice second test cycle brings right up about best can warmed up faster brand-new pack Con tinuing testing now see some funnies fourth cycle results say battery delivered put course cant believe l06o output result some cell imbalance ie some cells probably 4 x 10 ampere-minutes result previous cycle cutoffs being determined some weaker cellsthe better ones did get sufficiently discharged battery empty recharged Anyway numbers may some what error basic message good cared-for batteries can facili tate lot top-quality flying As now move up fifth cycle something different seems taking place apparent charge return per centage seems decreasing substanti ally Notice also end-of-charge terminal voltage rather highmaybe past peak though battery likely certain its cells fully charged sixth run tends confirm suspicion attempt put charge battery produces same discharge ampere-minutes fifth run corresponding lower output/input percen tage venting well Good griefone precious cells actually vented Oh well anything science No isnt first time Ive popped sorta knew gonna happen fact quite warm overcharged pack quickly cooled put back use out suffering much far can see preceding test data evi dent can expect recover nearly battery charge within limits both new well-used well-caredPIANUT SCALS MODELS Kits $595 ZEROMILES M-IB PIETENPOLDRUINE PIPER CUBCOUGAR ANDRESONGIPSY MOTH MUSTANGLACEY M-IOGANAGOBIE jjjjrjWstmd PRAIRIE BIRD 4 KIT $595 SPORT MODELS BABY ACE $649 ONE NITE 28 ONE NIlE Ic 9595 STRINGLESS $495 PECK ROG RADIO 3 LIMPS CONTROLLED Ii and 13 FOOT LONOKITS OR READY TO FLY NOW IN TNREE COLORS ORANGE YELLOW LOW PRICES CATAIX No 25 $150 Pck-Pelyauers PN~l9 4424638 469-8615 L BOX 2498 MA LA MESA CA 92041 batteries Also assuming used originally just like new apparent battery capacity decreases use case looks like about / original capacity remain ing bad considering 300 flights Surely battery does owe anything its still usable Taking look terminal voltage during discharge last cycles both batteries see terminal voltage heavily-used pack notice ably lower new pack little voltage can make big difference mo tor power Im sure plane would show pep longer period new battery However Ive decided leave pack place perhaps rerun tests after another hundred flights just see what happens point rest case properly cared-for batteries can last hundreds flights Please note Im saying same wouldnt true batteries have digitally charged hundreds timesthe fact simply dont have therefore cant tell question whether lessthan-maximum charging good Ill simply redirect attention April 1984 issue page 42 flight histograms plane very bat tery tested show hundreds data points averaging out about 13-minute flight times Period Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC HelicopterslJolly Continued page 56 sensitive rotor blade Normal blade construction calls hardwood leading edge balsa trailing edge use hardwood important two reasons first gives necessary blade attach ment point second attempts balance rotor blade closer pivoting axis Rotor blades airfoil has its center gravity too far aft pivot point likely flutter commonly seen all-flying tailplanes used RC sailplanes rotor blades too werent Hiller flybar-and-paddle system transmitting necessary aerodynamic dampening rotor system machines would quite unflyable out going too far aerodynam ically speaking flybarless Bell-inputonly system used Horizon Kobe Kiko R-22 must have center-ofgravity-corrected rotor blades perform properly Without flybar aft center gravity first control input would send blade oscillation might never come back equilibrium oscillation would course negate control inputs rotor system Helicopters flybars fly 160 Model Aviation better CG-corrected rotor blades Full-size helicopter blades have spars located near leading edges may also use lead ballast correct centers gravity now see center-of-gravity-cor rected rotor blades good idea blades normal construction will re quire additional ballast balance proper ly course models use flybar less heads will now obsolete can no longer put metal blades cor rect centers gravity make flyable first glance thats way looksbut remember said rule poorly thought out Lets look build set CG-correct ed blades Method construction CG-cor rected blades two best examples GB-corrected blades now market Horizon blades Kobe R-22 blades Both methods offer usable blade highly unlikely release lead missiles contact ground R-22 blade looks like RC Hel icopter blades except three slots milled leading edge blade slots approximately % x 3 equally-spaced outer third rotor blade slot completely milled through bottom sur face slot forms pocket 15-gram about A-oz lead weight lie snugly place three lead slugs merely epoxied place blades covered money type con struction far safest produces rotor blade will break contact limbwhether oak tree legand very likely lead will stay put broken blade hurt anyone know lead will stay put Well Ive broken some R-22 blades can tell break Remember said blade weights located outer portion blade done because further toward tip ballast located greater moment arm through does its work lead far ther out takes less get done Likewise heavy tip strikes object ballast applies leverage toward center blade causing shear point form allowing tip blade break off flutter ground So think FAI rule poorly written FAI Legislation Bouzo Goes Paris Youd think country belongs FAI would send its greatest modeling minds ClAM meeting right Wrong Some peo ple meeting havent flown model 20 yearsneedless say theyve competed time either fact may vote RC Helicopter rules may never have seen fly Far-fetched think Let give example modern FAI thinking FAI Soaring known F3B period time 1976-1979 Austrian AME group busy kicking everybodys tail Europe model known Dassel just happened Dassel very pointed nose 1979 ClAM meeting somebody decided fix AME group Under guise safety proposed consequently passed proposal F3B Soarers would have minimum nose radius 75cm Cl Now want imagine being receiving end eight-pound Sailplane doing 110 mph As lie grave can contemplate im agine much better feel model larger nose radius might well have passed rule said will disqualified contest Sailplane strikes kills fellow competitor Whats wrong FAI Helicopter rule major problem lies state ment No metal rotor blades permitted except blade attach ment point dont have use metal ballast blades can use some other substance some organic byproducts petroleum come mind have density less metal used larger amounts can come up same mass sake argument lets say some has developed plastic 1A Fine Quality Flying Models C 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 4 4 4 4 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 September 1984 161 Catalog $150 -J $75 CI sets erage laili eacn Ave na Dei CRcFCED UP Get back air fast Sig fuselage wing kits Sig kits have replacement fuselage wing kit plus other kit items repair model including cowls wheel pants turtle decks canopies wire aluminum landing gear decals much much prices see Sig Catalog order send check money order Sig Mfg Co Inc 401-7 So Front St Montezuma IA 50171 Phone 1-800-247-5008 orders within United States excluding Alaska Hawaii Iowa 515 623-5154 IEu FLY THE BEST FLY SIG dense lead modeler needs enlarge pockets R-22 blades three times grind plastic up mix epoxy voila has CG-correct blades have possibility releas ing missiles just deadly metal ones Worse yet adoption encourages use denser hardwood leading edge rotor blades well glass fiber comosite rotor blades event accident two types blades really think safety standpoint youre going come out better think just introduce rule states competitor breaks blades will eliminated competition am anarchist Rules neces sary poor rules worse no rules believe rule has cer tain implications future contestants rule proposed should passed well thought-out does stifle technology creativity future modelers believe better situation would have Helicopter Contest Board find acceptable method installation ballast publish AMA rule boormuch done descrip tion acceptable single-blade propellers CL Speed can turn new Emergency ruling around About month time read article ruling will brought before Contest Board adoption rule book dis agree adoption FAI definition rotor blades AMA competition either tell Contest Board about send views Ill see get right people BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon RacinglHage Continued page 57 trial balloon did prove quite successful other brands seemed have little effect times best times turned Master Airscrew plastic 9-6 about 17000 rpm Zinger Regular 9-6 Progressive Pitch 9-46 9-6 Power Props did well race didnt get started until 130 pm due continued possible showers did racing very close very fast particularly first race year Due fre quency matrixing three-plane heats necessary 50 heats plus two fly-offs completed little over 5 hours no reflys two crash es both No 3 pylon Dave Keats Mike Lasker Billy Johnson finished five rounds perfect scores provided exciting fly-off Dave taking marbles 162 Model Aviation Frank Baird novice won CAPS fast time award race results follows Times given two best fast times 1 D Keats 20 Pt 148/150 2 M Lasker 20 pt 148/150 3 B Johanson 20 pt 153/153 4 W Yea ger 17 Pt 154/157 5 B Pence 17 pt 153N/201 6 D Cohen 17 pt 155/ 157 7 J Cohen 16 Pt 152/153 8 J Kilsdonk 16 Pt 154/155 9 T Kwiat kowski 15 pt 153/157 10 B Hisey 15 pt 155/200 11 Merlino 15 Pt 158/159 12 R Morgan 15 Pt 158N 204 13 F Johanson 15 pt 159/201 14 J Krauer 15 Pt 200/ 200 15 Apaza 14 Pt l47A/155 Almost club country has some sort inner club competition would pretty boring belong club did anything So clubs gener ate some sort activity would bet time another almost clubs hold some kind race Whether Hand-Launched Gliders AAs Sport Pylon just about anything else can race some sort racing just about us have involved racing long time have seen areas have races almost week have seen same areas get burned out go 15-20 races summer down four five What happens Stop think about such thing too much left usually blame something elseusually lack inter est. Well knew just much competition still going local clubs know read newsletters sent AMA So what Well dont just sit around crying about itdo something about Promote racing Dont cancel race just because dont think will have good turnout will nothing bury racing event got started racing living Ohio Formula racing just afterthought Usually thrown end Pattern event just some added fun Nothing serious order get good races drive 300 500 miles So started promoting racing area went clubs never put Pylon Race before got Control Line club sponsor put race wasnt easy slow going first Usually would have Sport Pylon Formula would have maybe 15-20 sport 6-10 Formula Ones would get five rounds event day usually Sunday way would have spend night Along came Quarter Midget helped little new less expensive drew lot people racing moved Ohio Texas Continued page 164 Clevelands Gian$,PIas MANY NEWI FOR R/C BUFFS Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CO QUALITY * MASTER MODELS PLANS 54 SD Derrro,Ile 21 $48 ___ 7RConoICoIPBY5A$42 72Cor 02U1 4 L&S 104 Con Cor PBY5A $56 62 Honoord Roon 1k $40 96 Wrighl-NooyBooe $48 77 Rong $ 1 7G Fort $25 # 52W-Wnri2i Bed LS26 103 77W-Wnri2i R64 154868 D 84 Fokkr 07 FIr $39 108 60 Rorord Per tore $32 60 705071C Go-Boo $32 90 Roe ISO Sport 60 Soporrrorine S6B $24 90 SI,, Lono Wns $56 oporrrrorin S6B $32 80 Morfin 74 TAM-i $39 62 Con Honok P-6E $42 75 H-Ps 0400 torrob $32 94 CorHook P6E Fir $54 100 H-F8 0400 Boor $49 ~F' 62 Locklred V5 $24 65 MCiono Clippr $55 7 74 DoojIll, 0-B ii $42 97 MChno Clipper $75 93 Monooop Sport $54r 68 W,6 Whirlwind $24 80911 Spr Boildos $43- 68 Oyon Noojor$39I2$ 107 Aroooo C-3 Spr $30 68 OBonono VToil $39 61 Dooslo 0-28 Ok $32 77 Looorrrho 54, $25 22 Dooglo 0-2806 $49 72 N Mjioh Borob $49 ose Con tt 545- 65 MMoroodr B26 7i Morlin RiO 5ornb $29 81 OH Moqoiro Rb $42 7RTornerS W-W Ron $32r lOt DH MoqoBonok $55 r Oofrk Fi1C2 $39 98 Sror PT17Koy4i 94 Cor GofrIr Fi 1C2 $54 99 NBlk Widow F6i $69 66 09, Coorl Ro $24 7i Doog DC-s Tron $32 63 HowMrMollison $35 95 5 94 HoonMr Moth0, $45 86 H 63 Boeing P26A Frr $36 08 Cor0201/4 L&S $49 84 Boeint P26A Fir $48- 60 Dooglo M2 Moil $24 69 Woro C-6 Cobir $36 68 Brilol Bolidos Fir $30 64 teeclo Ci7t Slog $28 59 BronontooMLA $54- eof Ci 7-B Srs $49- 107 Grow Beorol FRF $54n 55 Look ii Elootro $30 73 Trorel Air 6000 $24 8 82 Look ii EI,rro $40 i07 Mon MB-I Boor $44. 62 Siioo 7 W 5t7 $16 91 Lirrdbrg NO211 $39 81 Siinon T/W 5B7 $24 108 FoirclrPTi9 Tr 123 Slinon T W SR7 $38 90 Woo Toper-Win8 039 39 Briiol Fir P2-B $20 75 WeiId Lyonder $33 Briiol Fir P2-B832 100 Woild Lyonder $49 lit RriloI Fir P2-B $45 57 Ford Trirroir 4-AT $2t 4TL Peoo Speo $45 76FodTori 4AT $45 63 Skyrooloel XP3P-i $20 114 F 4 T ml 4 AT $59 6 Cor Worhk P40 $24 84 8 ioyoe TFJ 2 $56 Look Lisfoing P38 $38 93 ben n C 2Aorpk $69 56 t9 Seot Aw $24 58 DroorJ2F Dook $29 4 topSeo-B Anoph $39 78 GroorJ2-F Dook $56 106 Piper i-S Cob$39 59 Gorfro G1V torn $52 8 Look Hod, Bork $28 117 Gorho GiV Room $39 63 Grow F6F Helloor $28 68 Bron-Winlmle Bird 045 55 torh Boky Boll $24 54 Con Twill XF934 $28 Nor Sold Thro Dolor Frioo,okleoi olmong Goor 1200 Orhor 6 1 2 Foil Irol 500 Op Add 10% oil order frippirg & in, err lo USA Cor & Eloowboro ii 15% 25% ky oriol oololog $200 inolod, Polo Liell Frire l,l H ~O ,o oon Si MODEL&SUPPLY LEVELAND iosoie OBOCOIT AVB CLEVELAN
Edition: Model Aviation - 1984/09
Page Numbers: 56, 160, 161, 162
Radio Control Helicopters Larry Jolly HOLD IT As some know new Emergency Rule has just proposed Horace Hagen Chairman RC Helicopter Contest Board approved John Grigg AMA President calls elimination metal weights added tail main rotors also prohibits metal knife-edged main tail rotor blades Under standard Con test Board Procedures Emergency Rule action must validated Con test Board vqte must occur no earlier four weeks after ruling published AMA publication case appeared August 1984 Competition Newsletter under heading Safety Rule RC Helicopters Nats page 112 later six weeks after publication Con test Board receives 10-day-turnaround ballot whereby may approve dis approve Emergency action Editors note See months Competition Newsletter action rul ing want speak out situation issue Model Aviation will reach modelers before voting period begins can contact AMA District RC Helicopter Contest Board member name address appear Compe tition Directory section Compe tition Newsletter portion issue can also contact RC Helicopter Contest Board Chairman AMA Presi dent John Grigg want Please bear try explain thoughts new rule think should tell RC Helicopter Contest Board defeat its adoption Metal-weighted rotor blades illegal AMA competition Thats right guys Taking advantage recent joint meeting between AMA Executive Council chairmen Contest Boards Horace Hagen John Grigg introduced supported insertion FAT definition rotor blades making illegal run type blade AMA competition classes FAT rules states Metal main tail rotor blades forbidden Knife-edge leading edges forbidden main tail rotor blades No metal rotor blades perI mitted except blade attachment point Emphasis added read no further end rule sounds like common sense right WRONG Start reading between lines around rules youll see poorly passage thought out before go hows whys rules legislation lets see anybody would want ballast rotor blades first place ballast blades would venture say Helicopter fliers reading fly main rotor blades tail heavy blades have center pressure pivoting axis ap proximately 30% mean chord have balance point center gravity aft pivoting axis farther aft blades center gravity pitchContinued page 160 Larrys stuff TV Above L Condor ABC pilot same name computer-controlled drone reality modified Kobe Kilco gas-powered Robertson R-22 model uses KK fiybriesa rotor head blades Scalelilce appearance model Hughes comes flybariess rotor headwhich will no longer usable new No metal weights rotor AMA rule goes effect Larry has lots say about column also see R Above Condor chasing bad guys down Los Angeles River Camera crew just out sight left Condor flying about 45 mph right Death Condor An on-purpose crash Throttle Hold ON full negative cyclic pitch 20-ft altitude gave spectacular crash Three movie cameras running left has cameraman 56 Model Avitinn Another Larrys Air WOlf choppers under Hirobo Hughes 500 shell Schiuter Heiboy mechanics Rotor uses Schiuter-type flybariess control rotor blade has ounce lead Its tip model spun tree Russian forest Converting Gb En gines Ignition has advantages such Savings cost fuel Less oily mess no Plugs burn out Use boats Cars Planes helicopters Can adapted Larger engines place Flywheel Thus saving weight No machine work voiced needed screw driver drill Most available Gb en gines can converted features yours won new rn iI6IJ5IL MAKK LDlTwo four cycles pointless sstens no points worry aboutTwins etc unit comes predrilled disk sensor formed clamp mounting sensor engine Complete instructions convertion timing procedures in- Complete cluded Unit operates 48 v Low current drain Weight 2 ozs size 2 x 2 x 75 System inches needed complete system Ignition coil spark plug on/off switch available separately complete system fuel 69 95 ignition lines included No ba e es nc uded State engine size use ordering FABTRONICSCash M 0 Certified Check plus $300 postage handling 15860 Via Riverapersonal checks take time clear Calif residents add tax San Lorenzo CA 94580 Brochure $1 00 refundable purchase label capacity 72 ampere-minutes 12 Ah behavior ter minal voltage during charge think battery could actually hold charge voltage did rise usual values experienced during digital charge Now much-used battery Notice second test cycle brings right up about best can warmed up faster brand-new pack Con tinuing testing now see some funnies fourth cycle results say battery delivered put course cant believe l06o output result some cell imbalance ie some cells probably 4 x 10 ampere-minutes result previous cycle cutoffs being determined some weaker cellsthe better ones did get sufficiently discharged battery empty recharged Anyway numbers may some what error basic message good cared-for batteries can facili tate lot top-quality flying As now move up fifth cycle something different seems taking place apparent charge return per centage seems decreasing substanti ally Notice also end-of-charge terminal voltage rather highmaybe past peak though battery likely certain its cells fully charged sixth run tends confirm suspicion attempt put charge battery produces same discharge ampere-minutes fifth run corresponding lower output/input percen tage venting well Good griefone precious cells actually vented Oh well anything science No isnt first time Ive popped sorta knew gonna happen fact quite warm overcharged pack quickly cooled put back use out suffering much far can see preceding test data evi dent can expect recover nearly battery charge within limits both new well-used well-caredPIANUT SCALS MODELS Kits $595 ZEROMILES M-IB PIETENPOLDRUINE PIPER CUBCOUGAR ANDRESONGIPSY MOTH MUSTANGLACEY M-IOGANAGOBIE jjjjrjWstmd PRAIRIE BIRD 4 KIT $595 SPORT MODELS BABY ACE $649 ONE NITE 28 ONE NIlE Ic 9595 STRINGLESS $495 PECK ROG RADIO 3 LIMPS CONTROLLED Ii and 13 FOOT LONOKITS OR READY TO FLY NOW IN TNREE COLORS ORANGE YELLOW LOW PRICES CATAIX No 25 $150 Pck-Pelyauers PN~l9 4424638 469-8615 L BOX 2498 MA LA MESA CA 92041 batteries Also assuming used originally just like new apparent battery capacity decreases use case looks like about / original capacity remain ing bad considering 300 flights Surely battery does owe anything its still usable Taking look terminal voltage during discharge last cycles both batteries see terminal voltage heavily-used pack notice ably lower new pack little voltage can make big difference mo tor power Im sure plane would show pep longer period new battery However Ive decided leave pack place perhaps rerun tests after another hundred flights just see what happens point rest case properly cared-for batteries can last hundreds flights Please note Im saying same wouldnt true batteries have digitally charged hundreds timesthe fact simply dont have therefore cant tell question whether lessthan-maximum charging good Ill simply redirect attention April 1984 issue page 42 flight histograms plane very bat tery tested show hundreds data points averaging out about 13-minute flight times Period Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC HelicopterslJolly Continued page 56 sensitive rotor blade Normal blade construction calls hardwood leading edge balsa trailing edge use hardwood important two reasons first gives necessary blade attach ment point second attempts balance rotor blade closer pivoting axis Rotor blades airfoil has its center gravity too far aft pivot point likely flutter commonly seen all-flying tailplanes used RC sailplanes rotor blades too werent Hiller flybar-and-paddle system transmitting necessary aerodynamic dampening rotor system machines would quite unflyable out going too far aerodynam ically speaking flybarless Bell-inputonly system used Horizon Kobe Kiko R-22 must have center-ofgravity-corrected rotor blades perform properly Without flybar aft center gravity first control input would send blade oscillation might never come back equilibrium oscillation would course negate control inputs rotor system Helicopters flybars fly 160 Model Aviation better CG-corrected rotor blades Full-size helicopter blades have spars located near leading edges may also use lead ballast correct centers gravity now see center-of-gravity-cor rected rotor blades good idea blades normal construction will re quire additional ballast balance proper ly course models use flybar less heads will now obsolete can no longer put metal blades cor rect centers gravity make flyable first glance thats way looksbut remember said rule poorly thought out Lets look build set CG-correct ed blades Method construction CG-cor rected blades two best examples GB-corrected blades now market Horizon blades Kobe R-22 blades Both methods offer usable blade highly unlikely release lead missiles contact ground R-22 blade looks like RC Hel icopter blades except three slots milled leading edge blade slots approximately % x 3 equally-spaced outer third rotor blade slot completely milled through bottom sur face slot forms pocket 15-gram about A-oz lead weight lie snugly place three lead slugs merely epoxied place blades covered money type con struction far safest produces rotor blade will break contact limbwhether oak tree legand very likely lead will stay put broken blade hurt anyone know lead will stay put Well Ive broken some R-22 blades can tell break Remember said blade weights located outer portion blade done because further toward tip ballast located greater moment arm through does its work lead far ther out takes less get done Likewise heavy tip strikes object ballast applies leverage toward center blade causing shear point form allowing tip blade break off flutter ground So think FAI rule poorly written FAI Legislation Bouzo Goes Paris Youd think country belongs FAI would send its greatest modeling minds ClAM meeting right Wrong Some peo ple meeting havent flown model 20 yearsneedless say theyve competed time either fact may vote RC Helicopter rules may never have seen fly Far-fetched think Let give example modern FAI thinking FAI Soaring known F3B period time 1976-1979 Austrian AME group busy kicking everybodys tail Europe model known Dassel just happened Dassel very pointed nose 1979 ClAM meeting somebody decided fix AME group Under guise safety proposed consequently passed proposal F3B Soarers would have minimum nose radius 75cm Cl Now want imagine being receiving end eight-pound Sailplane doing 110 mph As lie grave can contemplate im agine much better feel model larger nose radius might well have passed rule said will disqualified contest Sailplane strikes kills fellow competitor Whats wrong FAI Helicopter rule major problem lies state ment No metal rotor blades permitted except blade attach ment point dont have use metal ballast blades can use some other substance some organic byproducts petroleum come mind have density less metal used larger amounts can come up same mass sake argument lets say some has developed plastic 1A Fine Quality Flying Models C 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 4 4 4 4 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 September 1984 161 Catalog $150 -J $75 CI sets erage laili eacn Ave na Dei CRcFCED UP Get back air fast Sig fuselage wing kits Sig kits have replacement fuselage wing kit plus other kit items repair model including cowls wheel pants turtle decks canopies wire aluminum landing gear decals much much prices see Sig Catalog order send check money order Sig Mfg Co Inc 401-7 So Front St Montezuma IA 50171 Phone 1-800-247-5008 orders within United States excluding Alaska Hawaii Iowa 515 623-5154 IEu FLY THE BEST FLY SIG dense lead modeler needs enlarge pockets R-22 blades three times grind plastic up mix epoxy voila has CG-correct blades have possibility releas ing missiles just deadly metal ones Worse yet adoption encourages use denser hardwood leading edge rotor blades well glass fiber comosite rotor blades event accident two types blades really think safety standpoint youre going come out better think just introduce rule states competitor breaks blades will eliminated competition am anarchist Rules neces sary poor rules worse no rules believe rule has cer tain implications future contestants rule proposed should passed well thought-out does stifle technology creativity future modelers believe better situation would have Helicopter Contest Board find acceptable method installation ballast publish AMA rule boormuch done descrip tion acceptable single-blade propellers CL Speed can turn new Emergency ruling around About month time read article ruling will brought before Contest Board adoption rule book dis agree adoption FAI definition rotor blades AMA competition either tell Contest Board about send views Ill see get right people BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon RacinglHage Continued page 57 trial balloon did prove quite successful other brands seemed have little effect times best times turned Master Airscrew plastic 9-6 about 17000 rpm Zinger Regular 9-6 Progressive Pitch 9-46 9-6 Power Props did well race didnt get started until 130 pm due continued possible showers did racing very close very fast particularly first race year Due fre quency matrixing three-plane heats necessary 50 heats plus two fly-offs completed little over 5 hours no reflys two crash es both No 3 pylon Dave Keats Mike Lasker Billy Johnson finished five rounds perfect scores provided exciting fly-off Dave taking marbles 162 Model Aviation Frank Baird novice won CAPS fast time award race results follows Times given two best fast times 1 D Keats 20 Pt 148/150 2 M Lasker 20 pt 148/150 3 B Johanson 20 pt 153/153 4 W Yea ger 17 Pt 154/157 5 B Pence 17 pt 153N/201 6 D Cohen 17 pt 155/ 157 7 J Cohen 16 Pt 152/153 8 J Kilsdonk 16 Pt 154/155 9 T Kwiat kowski 15 pt 153/157 10 B Hisey 15 pt 155/200 11 Merlino 15 Pt 158/159 12 R Morgan 15 Pt 158N 204 13 F Johanson 15 pt 159/201 14 J Krauer 15 Pt 200/ 200 15 Apaza 14 Pt l47A/155 Almost club country has some sort inner club competition would pretty boring belong club did anything So clubs gener ate some sort activity would bet time another almost clubs hold some kind race Whether Hand-Launched Gliders AAs Sport Pylon just about anything else can race some sort racing just about us have involved racing long time have seen areas have races almost week have seen same areas get burned out go 15-20 races summer down four five What happens Stop think about such thing too much left usually blame something elseusually lack inter est. Well knew just much competition still going local clubs know read newsletters sent AMA So what Well dont just sit around crying about itdo something about Promote racing Dont cancel race just because dont think will have good turnout will nothing bury racing event got started racing living Ohio Formula racing just afterthought Usually thrown end Pattern event just some added fun Nothing serious order get good races drive 300 500 miles So started promoting racing area went clubs never put Pylon Race before got Control Line club sponsor put race wasnt easy slow going first Usually would have Sport Pylon Formula would have maybe 15-20 sport 6-10 Formula Ones would get five rounds event day usually Sunday way would have spend night Along came Quarter Midget helped little new less expensive drew lot people racing moved Ohio Texas Continued page 164 Clevelands Gian$,PIas MANY NEWI FOR R/C BUFFS Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CO QUALITY * MASTER MODELS PLANS 54 SD Derrro,Ile 21 $48 ___ 7RConoICoIPBY5A$42 72Cor 02U1 4 L&S 104 Con Cor PBY5A $56 62 Honoord Roon 1k $40 96 Wrighl-NooyBooe $48 77 Rong $ 1 7G Fort $25 # 52W-Wnri2i Bed LS26 103 77W-Wnri2i R64 154868 D 84 Fokkr 07 FIr $39 108 60 Rorord Per tore $32 60 705071C Go-Boo $32 90 Roe ISO Sport 60 Soporrrorine S6B $24 90 SI,, Lono Wns $56 oporrrrorin S6B $32 80 Morfin 74 TAM-i $39 62 Con Honok P-6E $42 75 H-Ps 0400 torrob $32 94 CorHook P6E Fir $54 100 H-F8 0400 Boor $49 ~F' 62 Locklred V5 $24 65 MCiono Clippr $55 7 74 DoojIll, 0-B ii $42 97 MChno Clipper $75 93 Monooop Sport $54r 68 W,6 Whirlwind $24 80911 Spr Boildos $43- 68 Oyon Noojor$39I2$ 107 Aroooo C-3 Spr $30 68 OBonono VToil $39 61 Dooslo 0-28 Ok $32 77 Looorrrho 54, $25 22 Dooglo 0-2806 $49 72 N Mjioh Borob $49 ose Con tt 545- 65 MMoroodr B26 7i Morlin RiO 5ornb $29 81 OH Moqoiro Rb $42 7RTornerS W-W Ron $32r lOt DH MoqoBonok $55 r Oofrk Fi1C2 $39 98 Sror PT17Koy4i 94 Cor GofrIr Fi 1C2 $54 99 NBlk Widow F6i $69 66 09, Coorl Ro $24 7i Doog DC-s Tron $32 63 HowMrMollison $35 95 5 94 HoonMr Moth0, $45 86 H 63 Boeing P26A Frr $36 08 Cor0201/4 L&S $49 84 Boeint P26A Fir $48- 60 Dooglo M2 Moil $24 69 Woro C-6 Cobir $36 68 Brilol Bolidos Fir $30 64 teeclo Ci7t Slog $28 59 BronontooMLA $54- eof Ci 7-B Srs $49- 107 Grow Beorol FRF $54n 55 Look ii Elootro $30 73 Trorel Air 6000 $24 8 82 Look ii EI,rro $40 i07 Mon MB-I Boor $44. 62 Siioo 7 W 5t7 $16 91 Lirrdbrg NO211 $39 81 Siinon T/W 5B7 $24 108 FoirclrPTi9 Tr 123 Slinon T W SR7 $38 90 Woo Toper-Win8 039 39 Briiol Fir P2-B $20 75 WeiId Lyonder $33 Briiol Fir P2-B832 100 Woild Lyonder $49 lit RriloI Fir P2-B $45 57 Ford Trirroir 4-AT $2t 4TL Peoo Speo $45 76FodTori 4AT $45 63 Skyrooloel XP3P-i $20 114 F 4 T ml 4 AT $59 6 Cor Worhk P40 $24 84 8 ioyoe TFJ 2 $56 Look Lisfoing P38 $38 93 ben n C 2Aorpk $69 56 t9 Seot Aw $24 58 DroorJ2F Dook $29 4 topSeo-B Anoph $39 78 GroorJ2-F Dook $56 106 Piper i-S Cob$39 59 Gorfro G1V torn $52 8 Look Hod, Bork $28 117 Gorho GiV Room $39 63 Grow F6F Helloor $28 68 Bron-Winlmle Bird 045 55 torh Boky Boll $24 54 Con Twill XF934 $28 Nor Sold Thro Dolor Frioo,okleoi olmong Goor 1200 Orhor 6 1 2 Foil Irol 500 Op Add 10% oil order frippirg & in, err lo USA Cor & Eloowboro ii 15% 25% ky oriol oololog $200 inolod, Polo Liell Frire l,l H ~O ,o oon Si MODEL&SUPPLY LEVELAND iosoie OBOCOIT AVB CLEVELAN
Edition: Model Aviation - 1984/09
Page Numbers: 56, 160, 161, 162
Radio Control Helicopters Larry Jolly HOLD IT As some know new Emergency Rule has just proposed Horace Hagen Chairman RC Helicopter Contest Board approved John Grigg AMA President calls elimination metal weights added tail main rotors also prohibits metal knife-edged main tail rotor blades Under standard Con test Board Procedures Emergency Rule action must validated Con test Board vqte must occur no earlier four weeks after ruling published AMA publication case appeared August 1984 Competition Newsletter under heading Safety Rule RC Helicopters Nats page 112 later six weeks after publication Con test Board receives 10-day-turnaround ballot whereby may approve dis approve Emergency action Editors note See months Competition Newsletter action rul ing want speak out situation issue Model Aviation will reach modelers before voting period begins can contact AMA District RC Helicopter Contest Board member name address appear Compe tition Directory section Compe tition Newsletter portion issue can also contact RC Helicopter Contest Board Chairman AMA Presi dent John Grigg want Please bear try explain thoughts new rule think should tell RC Helicopter Contest Board defeat its adoption Metal-weighted rotor blades illegal AMA competition Thats right guys Taking advantage recent joint meeting between AMA Executive Council chairmen Contest Boards Horace Hagen John Grigg introduced supported insertion FAT definition rotor blades making illegal run type blade AMA competition classes FAT rules states Metal main tail rotor blades forbidden Knife-edge leading edges forbidden main tail rotor blades No metal rotor blades perI mitted except blade attachment point Emphasis added read no further end rule sounds like common sense right WRONG Start reading between lines around rules youll see poorly passage thought out before go hows whys rules legislation lets see anybody would want ballast rotor blades first place ballast blades would venture say Helicopter fliers reading fly main rotor blades tail heavy blades have center pressure pivoting axis ap proximately 30% mean chord have balance point center gravity aft pivoting axis farther aft blades center gravity pitchContinued page 160 Larrys stuff TV Above L Condor ABC pilot same name computer-controlled drone reality modified Kobe Kilco gas-powered Robertson R-22 model uses KK fiybriesa rotor head blades Scalelilce appearance model Hughes comes flybariess rotor headwhich will no longer usable new No metal weights rotor AMA rule goes effect Larry has lots say about column also see R Above Condor chasing bad guys down Los Angeles River Camera crew just out sight left Condor flying about 45 mph right Death Condor An on-purpose crash Throttle Hold ON full negative cyclic pitch 20-ft altitude gave spectacular crash Three movie cameras running left has cameraman 56 Model Avitinn Another Larrys Air WOlf choppers under Hirobo Hughes 500 shell Schiuter Heiboy mechanics Rotor uses Schiuter-type flybariess control rotor blade has ounce lead Its tip model spun tree Russian forest Converting Gb En gines Ignition has advantages such Savings cost fuel Less oily mess no Plugs burn out Use boats Cars Planes helicopters Can adapted Larger engines place Flywheel Thus saving weight No machine work voiced needed screw driver drill Most available Gb en gines can converted features yours won new rn iI6IJ5IL MAKK LDlTwo four cycles pointless sstens no points worry aboutTwins etc unit comes predrilled disk sensor formed clamp mounting sensor engine Complete instructions convertion timing procedures in- Complete cluded Unit operates 48 v Low current drain Weight 2 ozs size 2 x 2 x 75 System inches needed complete system Ignition coil spark plug on/off switch available separately complete system fuel 69 95 ignition lines included No ba e es nc uded State engine size use ordering FABTRONICSCash M 0 Certified Check plus $300 postage handling 15860 Via Riverapersonal checks take time clear Calif residents add tax San Lorenzo CA 94580 Brochure $1 00 refundable purchase label capacity 72 ampere-minutes 12 Ah behavior ter minal voltage during charge think battery could actually hold charge voltage did rise usual values experienced during digital charge Now much-used battery Notice second test cycle brings right up about best can warmed up faster brand-new pack Con tinuing testing now see some funnies fourth cycle results say battery delivered put course cant believe l06o output result some cell imbalance ie some cells probably 4 x 10 ampere-minutes result previous cycle cutoffs being determined some weaker cellsthe better ones did get sufficiently discharged battery empty recharged Anyway numbers may some what error basic message good cared-for batteries can facili tate lot top-quality flying As now move up fifth cycle something different seems taking place apparent charge return per centage seems decreasing substanti ally Notice also end-of-charge terminal voltage rather highmaybe past peak though battery likely certain its cells fully charged sixth run tends confirm suspicion attempt put charge battery produces same discharge ampere-minutes fifth run corresponding lower output/input percen tage venting well Good griefone precious cells actually vented Oh well anything science No isnt first time Ive popped sorta knew gonna happen fact quite warm overcharged pack quickly cooled put back use out suffering much far can see preceding test data evi dent can expect recover nearly battery charge within limits both new well-used well-caredPIANUT SCALS MODELS Kits $595 ZEROMILES M-IB PIETENPOLDRUINE PIPER CUBCOUGAR ANDRESONGIPSY MOTH MUSTANGLACEY M-IOGANAGOBIE jjjjrjWstmd PRAIRIE BIRD 4 KIT $595 SPORT MODELS BABY ACE $649 ONE NITE 28 ONE NIlE Ic 9595 STRINGLESS $495 PECK ROG RADIO 3 LIMPS CONTROLLED Ii and 13 FOOT LONOKITS OR READY TO FLY NOW IN TNREE COLORS ORANGE YELLOW LOW PRICES CATAIX No 25 $150 Pck-Pelyauers PN~l9 4424638 469-8615 L BOX 2498 MA LA MESA CA 92041 batteries Also assuming used originally just like new apparent battery capacity decreases use case looks like about / original capacity remain ing bad considering 300 flights Surely battery does owe anything its still usable Taking look terminal voltage during discharge last cycles both batteries see terminal voltage heavily-used pack notice ably lower new pack little voltage can make big difference mo tor power Im sure plane would show pep longer period new battery However Ive decided leave pack place perhaps rerun tests after another hundred flights just see what happens point rest case properly cared-for batteries can last hundreds flights Please note Im saying same wouldnt true batteries have digitally charged hundreds timesthe fact simply dont have therefore cant tell question whether lessthan-maximum charging good Ill simply redirect attention April 1984 issue page 42 flight histograms plane very bat tery tested show hundreds data points averaging out about 13-minute flight times Period Happy Landings Bob Kopski 25 West End Dr Lans dale PA 19446 RC HelicopterslJolly Continued page 56 sensitive rotor blade Normal blade construction calls hardwood leading edge balsa trailing edge use hardwood important two reasons first gives necessary blade attach ment point second attempts balance rotor blade closer pivoting axis Rotor blades airfoil has its center gravity too far aft pivot point likely flutter commonly seen all-flying tailplanes used RC sailplanes rotor blades too werent Hiller flybar-and-paddle system transmitting necessary aerodynamic dampening rotor system machines would quite unflyable out going too far aerodynam ically speaking flybarless Bell-inputonly system used Horizon Kobe Kiko R-22 must have center-ofgravity-corrected rotor blades perform properly Without flybar aft center gravity first control input would send blade oscillation might never come back equilibrium oscillation would course negate control inputs rotor system Helicopters flybars fly 160 Model Aviation better CG-corrected rotor blades Full-size helicopter blades have spars located near leading edges may also use lead ballast correct centers gravity now see center-of-gravity-cor rected rotor blades good idea blades normal construction will re quire additional ballast balance proper ly course models use flybar less heads will now obsolete can no longer put metal blades cor rect centers gravity make flyable first glance thats way looksbut remember said rule poorly thought out Lets look build set CG-correct ed blades Method construction CG-cor rected blades two best examples GB-corrected blades now market Horizon blades Kobe R-22 blades Both methods offer usable blade highly unlikely release lead missiles contact ground R-22 blade looks like RC Hel icopter blades except three slots milled leading edge blade slots approximately % x 3 equally-spaced outer third rotor blade slot completely milled through bottom sur face slot forms pocket 15-gram about A-oz lead weight lie snugly place three lead slugs merely epoxied place blades covered money type con struction far safest produces rotor blade will break contact limbwhether oak tree legand very likely lead will stay put broken blade hurt anyone know lead will stay put Well Ive broken some R-22 blades can tell break Remember said blade weights located outer portion blade done because further toward tip ballast located greater moment arm through does its work lead far ther out takes less get done Likewise heavy tip strikes object ballast applies leverage toward center blade causing shear point form allowing tip blade break off flutter ground So think FAI rule poorly written FAI Legislation Bouzo Goes Paris Youd think country belongs FAI would send its greatest modeling minds ClAM meeting right Wrong Some peo ple meeting havent flown model 20 yearsneedless say theyve competed time either fact may vote RC Helicopter rules may never have seen fly Far-fetched think Let give example modern FAI thinking FAI Soaring known F3B period time 1976-1979 Austrian AME group busy kicking everybodys tail Europe model known Dassel just happened Dassel very pointed nose 1979 ClAM meeting somebody decided fix AME group Under guise safety proposed consequently passed proposal F3B Soarers would have minimum nose radius 75cm Cl Now want imagine being receiving end eight-pound Sailplane doing 110 mph As lie grave can contemplate im agine much better feel model larger nose radius might well have passed rule said will disqualified contest Sailplane strikes kills fellow competitor Whats wrong FAI Helicopter rule major problem lies state ment No metal rotor blades permitted except blade attach ment point dont have use metal ballast blades can use some other substance some organic byproducts petroleum come mind have density less metal used larger amounts can come up same mass sake argument lets say some has developed plastic 1A Fine Quality Flying Models C 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 4 4 4 4 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 September 1984 161 Catalog $150 -J $75 CI sets erage laili eacn Ave na Dei CRcFCED UP Get back air fast Sig fuselage wing kits Sig kits have replacement fuselage wing kit plus other kit items repair model including cowls wheel pants turtle decks canopies wire aluminum landing gear decals much much prices see Sig Catalog order send check money order Sig Mfg Co Inc 401-7 So Front St Montezuma IA 50171 Phone 1-800-247-5008 orders within United States excluding Alaska Hawaii Iowa 515 623-5154 IEu FLY THE BEST FLY SIG dense lead modeler needs enlarge pockets R-22 blades three times grind plastic up mix epoxy voila has CG-correct blades have possibility releas ing missiles just deadly metal ones Worse yet adoption encourages use denser hardwood leading edge rotor blades well glass fiber comosite rotor blades event accident two types blades really think safety standpoint youre going come out better think just introduce rule states competitor breaks blades will eliminated competition am anarchist Rules neces sary poor rules worse no rules believe rule has cer tain implications future contestants rule proposed should passed well thought-out does stifle technology creativity future modelers believe better situation would have Helicopter Contest Board find acceptable method installation ballast publish AMA rule boormuch done descrip tion acceptable single-blade propellers CL Speed can turn new Emergency ruling around About month time read article ruling will brought before Contest Board adoption rule book dis agree adoption FAI definition rotor blades AMA competition either tell Contest Board about send views Ill see get right people BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon RacinglHage Continued page 57 trial balloon did prove quite successful other brands seemed have little effect times best times turned Master Airscrew plastic 9-6 about 17000 rpm Zinger Regular 9-6 Progressive Pitch 9-46 9-6 Power Props did well race didnt get started until 130 pm due continued possible showers did racing very close very fast particularly first race year Due fre quency matrixing three-plane heats necessary 50 heats plus two fly-offs completed little over 5 hours no reflys two crash es both No 3 pylon Dave Keats Mike Lasker Billy Johnson finished five rounds perfect scores provided exciting fly-off Dave taking marbles 162 Model Aviation Frank Baird novice won CAPS fast time award race results follows Times given two best fast times 1 D Keats 20 Pt 148/150 2 M Lasker 20 pt 148/150 3 B Johanson 20 pt 153/153 4 W Yea ger 17 Pt 154/157 5 B Pence 17 pt 153N/201 6 D Cohen 17 pt 155/ 157 7 J Cohen 16 Pt 152/153 8 J Kilsdonk 16 Pt 154/155 9 T Kwiat kowski 15 pt 153/157 10 B Hisey 15 pt 155/200 11 Merlino 15 Pt 158/159 12 R Morgan 15 Pt 158N 204 13 F Johanson 15 pt 159/201 14 J Krauer 15 Pt 200/ 200 15 Apaza 14 Pt l47A/155 Almost club country has some sort inner club competition would pretty boring belong club did anything So clubs gener ate some sort activity would bet time another almost clubs hold some kind race Whether Hand-Launched Gliders AAs Sport Pylon just about anything else can race some sort racing just about us have involved racing long time have seen areas have races almost week have seen same areas get burned out go 15-20 races summer down four five What happens Stop think about such thing too much left usually blame something elseusually lack inter est. Well knew just much competition still going local clubs know read newsletters sent AMA So what Well dont just sit around crying about itdo something about Promote racing Dont cancel race just because dont think will have good turnout will nothing bury racing event got started racing living Ohio Formula racing just afterthought Usually thrown end Pattern event just some added fun Nothing serious order get good races drive 300 500 miles So started promoting racing area went clubs never put Pylon Race before got Control Line club sponsor put race wasnt easy slow going first Usually would have Sport Pylon Formula would have maybe 15-20 sport 6-10 Formula Ones would get five rounds event day usually Sunday way would have spend night Along came Quarter Midget helped little new less expensive drew lot people racing moved Ohio Texas Continued page 164 Clevelands Gian$,PIas MANY NEWI FOR R/C BUFFS Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CO QUALITY * MASTER MODELS PLANS 54 SD Derrro,Ile 21 $48 ___ 7RConoICoIPBY5A$42 72Cor 02U1 4 L&S 104 Con Cor PBY5A $56 62 Honoord Roon 1k $40 96 Wrighl-NooyBooe $48 77 Rong $ 1 7G Fort $25 # 52W-Wnri2i Bed LS26 103 77W-Wnri2i R64 154868 D 84 Fokkr 07 FIr $39 108 60 Rorord Per tore $32 60 705071C Go-Boo $32 90 Roe ISO Sport 60 Soporrrorine S6B $24 90 SI,, Lono Wns $56 oporrrrorin S6B $32 80 Morfin 74 TAM-i $39 62 Con Honok P-6E $42 75 H-Ps 0400 torrob $32 94 CorHook P6E Fir $54 100 H-F8 0400 Boor $49 ~F' 62 Locklred V5 $24 65 MCiono Clippr $55 7 74 DoojIll, 0-B ii $42 97 MChno Clipper $75 93 Monooop Sport $54r 68 W,6 Whirlwind $24 80911 Spr Boildos $43- 68 Oyon Noojor$39I2$ 107 Aroooo C-3 Spr $30 68 OBonono VToil $39 61 Dooslo 0-28 Ok $32 77 Looorrrho 54, $25 22 Dooglo 0-2806 $49 72 N Mjioh Borob $49 ose Con tt 545- 65 MMoroodr B26 7i Morlin RiO 5ornb $29 81 OH Moqoiro Rb $42 7RTornerS W-W Ron $32r lOt DH MoqoBonok $55 r Oofrk Fi1C2 $39 98 Sror PT17Koy4i 94 Cor GofrIr Fi 1C2 $54 99 NBlk Widow F6i $69 66 09, Coorl Ro $24 7i Doog DC-s Tron $32 63 HowMrMollison $35 95 5 94 HoonMr Moth0, $45 86 H 63 Boeing P26A Frr $36 08 Cor0201/4 L&S $49 84 Boeint P26A Fir $48- 60 Dooglo M2 Moil $24 69 Woro C-6 Cobir $36 68 Brilol Bolidos Fir $30 64 teeclo Ci7t Slog $28 59 BronontooMLA $54- eof Ci 7-B Srs $49- 107 Grow Beorol FRF $54n 55 Look ii Elootro $30 73 Trorel Air 6000 $24 8 82 Look ii EI,rro $40 i07 Mon MB-I Boor $44. 62 Siioo 7 W 5t7 $16 91 Lirrdbrg NO211 $39 81 Siinon T/W 5B7 $24 108 FoirclrPTi9 Tr 123 Slinon T W SR7 $38 90 Woo Toper-Win8 039 39 Briiol Fir P2-B $20 75 WeiId Lyonder $33 Briiol Fir P2-B832 100 Woild Lyonder $49 lit RriloI Fir P2-B $45 57 Ford Trirroir 4-AT $2t 4TL Peoo Speo $45 76FodTori 4AT $45 63 Skyrooloel XP3P-i $20 114 F 4 T ml 4 AT $59 6 Cor Worhk P40 $24 84 8 ioyoe TFJ 2 $56 Look Lisfoing P38 $38 93 ben n C 2Aorpk $69 56 t9 Seot Aw $24 58 DroorJ2F Dook $29 4 topSeo-B Anoph $39 78 GroorJ2-F Dook $56 106 Piper i-S Cob$39 59 Gorfro G1V torn $52 8 Look Hod, Bork $28 117 Gorho GiV Room $39 63 Grow F6F Helloor $28 68 Bron-Winlmle Bird 045 55 torh Boky Boll $24 54 Con Twill XF934 $28 Nor Sold Thro Dolor Frioo,okleoi olmong Goor 1200 Orhor 6 1 2 Foil Irol 500 Op Add 10% oil order frippirg & in, err lo USA Cor & Eloowboro ii 15% 25% ky oriol oololog $200 inolod, Polo Liell Frire l,l H ~O ,o oon Si MODEL&SUPPLY LEVELAND iosoie OBOCOIT AVB CLEVELAN