George M Myers 1*5 DISTRICT 9OITUICT 1TUICT -10 flde8 Hawaii ..~icude Pu AMA DISTRICTS District Frequency Coordinators 1 George Wilson 318Fisher-8t werpor MA 201r 2 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 3 James Bearden 5552 Foxrun Ct Cincinnati OH 45239 4 Paul Yacobucci 6708 Winthrop Dr Fayetteville NC 28301 5 Burnis Fields PO Box 1063 Strickland Rd Interlachen FL 32048 8 Loron HoIm 643 Hill Brook Quincy IL 62301 7 Bob Stamm Box 357 Monoqua WI 54548 8 Tom Blakoney 2300 May Ln Grand Prairie TX 75050 9 Steve Mangles Radio Service Center 918 5 Sheridan Denver CO 80226 10 George Steiner 2238 Rogue River Dr Sacramento CA 95826 11 Robert Balch 16439 SE Haig Dr Portland OR 97236 EVERYBODY IS LOOKING perfect Only two flIght stations new chan solution Ideally person should able nels first showed 4-Station Flight Card use RC channel anytime after checking public RC symposium Syracuse NY see isnt already use back February 1983 r new frequencies became effective didnt ex cite much interest audience wasnt hostile either didnt actually boo walk out auditorium fall asleep describing worked got much same reaction present ed other club meetings passed out sample copies finished article published Model Aviation June 1983 page 69 two major defects 72080 Bn/Wh should have placed Yellow flight line avoid image prob lems 72960 Y/Wh other listed other possible problems People didnt want know about problems wanted absolute security Anyhow 1983 Nats run some cases Contest Directors used 4-Station Flight Card People began use new channels good results Interference minimal Time went people occupied new channels idea having two flight stations accommodate new chan nels rejected opened Pandoras box minute three new RC channels began operating simultaneously various intermodulation combinations came play worst 3IM Third-Order Intermodulation triplets enumerated RT February 1986 began receiving reader letters blaming manufacturers FM etc problem really just funda mental characteristic radio transmissions might well know through term Frequency Committee chairman receiving advice pro con matter spelling out triplets finally spelled out after term ended brings question whether person can both Frequency Committee chairman reporter same time FIve flight statIons new RC channels response steadily-increasing number reader letters requesting alternative 4-Station Flight Card put forth five-pin 36 Model Aviation AMA District Frequency CoordInator has shipped JIL SX-200 frequency scanner like club can re quest borrow monitor conditIons field Map left shows AMA districts identifies Frequency Co ordinators youre already well-ac quainted DFC ought Mark Frankels 1/6-scale Lear Jet 35A won its class 1986 WRAM Show Twin Rossi 65s turn Dynamax fans George hears really moves out Ducted fans replacing Heilcopters ultimate challenge RCersand dont think its true George says ought try building flying White model has red blue trim grouping published July 1985 page 34 wasnt perfect either responses peo pie used good have letters indicate hundreds flights no interfer ence problems look can find missed couple 31M triplets flight stations People wanted still flight stations received couple letters people operating Mile Square Los Angeles Ive never seen Mile Square have spoken people have flown Somebody should video place Anyhow showed February 1986 col umn could make up number flight line groupings taking account triplets simple way calculate channels risk goes like 1 Double channel number oper ating transmitter eg RC46 operating calculate 2 x 46 x Subtract channel number other operating transmitter eg RC44 operating too calculate 92 44 Whats left channel number receiver might affected 3IM case RC48 Thanks Fred Marks current Frequency Committee chairman simple calcula tion method Id like make point about Third-Order Intermodulation 3IM can take place transmitters too close together inches apart Solution separate little couple feet can also take place within mixer stage receiver happens can 3IM product signal directly channel demonstrated above However power 3IM product will usually -30 dB 1/1000th power foreign trans mitters signals Now way such weak signal can hurt you let signal transmitter become small enough permit interference Since received power falls off square distance between transmitter receiver solution simple dont let interferers get closer receiver transmitter whole point M-factor January 1986 RT multiplier see type receiver has M 30 31M can expect trouble time transmitter three times further receiver interfering pair Solu don 31M problems Stand close Inter ferers 20 feet dont fly low over antennas luck whole question will go away soon Good transmitter design can practically eliminate transmitter 31M Good receiver design can reduce mixer-generated 3IM products very low levels AMA frequency committee can generate ROC Required Operating Characteristics ROC has desired effect 1988 Continued page 131 Balsa Spruce Plywood Kit Mfg match current prices now paying better quality Open Public 40-60% Discounts Special Month J/J6x4x36.. 54C Price good until July 1 1986 Sal Taibi Mike Taibi AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 MIG OF NISTARTER $2995 Charger PLEASE SPtCIFY WHICH CHARGtR WHEN ORDERING TO RK-STARTER revolutionary concept power iSV glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/b charger has LEO indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment receive free shipping handling TORK-STARTER $2995 Charger 11 tV 22tV 1 2V Fast Charger $2095 Without Charger CHARGERS $1295 Charger Only 1 tOy 220V 12V Fast Chargeri 1301464-2260 UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-13 engines UP5iGNT INVERTED INOINI IT-aOl 1040 1600 JT-601 45-60 1700 JT-901 7543 1900 ToOOS floor redo 00 00770 004 00 Most versatile mufflers ever offered 0 Designed fit inside cowls limIted space can also used HELICOPTERS BOATS 0 For UPRIGHT INVERTED SIDE mounted engines 0 Exhaust tubes point almost direction S Worm drive clamp universal mounting can bolted directly engine BASIC DIMENSIONS INCLUDES Exhaust pipe extensions clamps1402$ 7070$ 007 $90240 worm drive clamp muffler alignment plate gasket mounting screws Oi apSsasSeSevlflEOa5505OS5 155 $770 012400 000736700 070 lOl 00011527 ovoloble hobby shop ORDER DEtECT too Eranedofe shpmenf Check MO Vb Mc coo occepted Add $250 UPS 5200 coo ond 6% soles f05 Calf resident 0BC N Ui U 164 School St Daly CIty CA 94014 415 756-3400 July1986 37 Mon Fri 8am -4pm PSI ALTECH Marketing name Apologies due because slipup last months WRAM Show article wrong importer credited providing Simprop PCM-20 RC system Acorns wheel radio surface models ALTECH Marketing source products US Also price Acorns wheel radio should have given $16495 12421 Ransom Dr Glenn Dale MD 20769 aftIaso ICOINI 1507 $240 07 BOOTS Are Two Sides Story. Both Sides OPS Five Intake Port SLA 60 RC Look Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 37 shortly thereafter should possible fly combination channels con cerning ourselves Image Second- Third-Order Intermodulation Adjacent Chan nel other interferences What about known Interference am lawyer cannot give legal advice doesnt stop having opinions issue now interference What can Con test Director about person shows up contest insists flying RC channel known subject outside inter ference I You can refuse admit person contest AMA Official Model Aircraft Regulations 1986-1987 page 1 Contest Direc tors Authority state addition CD AMA-sanctioned event has authority perform safety inspections equipment prevent participant using equipment CDS opinion deemed unsafe Emphasis added doesnt say CD must perform safety inspections doesnt say CDs opinion has correct says CD has opinion equipment unsafe 2 Suppose person insists flying anyway contestant private citizen using same field What could CD might call police have person ejected arrested disorderly per son approach isnt calculated make friends needs enemies 3 There another way instance may have borrowed districts frequency scanner see photo bought own case need tune bad channel let problem child listen can mad somebody else Over years Ive talked lot about scan ners value someone has listen best time listen time people will flying should obvious surprising number people seem miss point Businesses air during week will often shut down weekends holidays well night So monitoring after 1100 pm because convenient just may will miss signals looking same vein scanner flight line mainly useful four things 1 Verifying channel transmitter radiates Does flag match 2 Verifying channels use pins match 3 Finding transmitters left im pound area 4 Catching two transmitters operating channel want scan outside interference vicinity flight line best way to put scanner car attach outside antenna drive around perimeter field scanner turned Plan route stay mile away flight line minimize interference transmitters use what Bill Hershberger did 85 Nats found new pocket pager 72320 MHz almost goes saying should know what looking An easy way get information perform some tests Have people operate AM FM PCM sets known channels can become accustomed sound Make sure listen both AM FM detector modes because makes difference may surprised discover some RC FM sets make clearer sounds scanner put AM mode other hand Continued page 134 Say0 ~Id T pert iOG 80wio this. fimerS postS IaO9 Matched rsuresaunuu ayalwm TOP PERFORMANCE K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 5 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Mrnrs-Ballsons FILLER KSB SUPER POXY RESIN t&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS July1986 131 Check out local hobby shop Parts People nose length 1 tall moment 2 just looks present flies well think would look less spindly shorter fuselage Box 26247 e New Orleans LA 701860 504242 201 SE 12th Street Pompano Beach FL 33080 305-785-7978 ENGINEERING THE LANDING GEAR PEOPLE Tired kit lading gears deal lit wear higgle preperly O & II Eegieeenng can salve year prahiems * Caste built year needs & specs guaranteed lit * SIring & durable withstand lnnhnal landing * 0 & 0 Engineering gear will work & keep year higie hying * Ia stack rnptacewent gear br mast popular madels Byrne Pills Christen Eagle CAP 21 Balsa USA J-3 CUB Air Tech Pawn Eagle gases Rig Stick Champ Cilabria R & N endels Snapper Slinger cad Snapper Tan Ignition Engirin Parta Only Over 600 items Send *200 current catalog Two channel wheel radio unbeatable performance Servo reversing & end point adjustments both channels Continuously adjustable steering rate Adjustable steering wheel tension lncludes receiver switch harness battery holder Comes withwo JRS5O5 servos Available 2TMHz 9fLV An extremely reliable radio Two channel system cars boats lncludes battery case drycells receiver two JRS5O5 servos Available 27 MHz BOTH RADIOS ARE COVERED BY CIRCUS HOBBIES WARRANTY TAKE ADVANTAGE OF OUR ERROR AND SAVE WHILE SUPPLIES LAST PRICES SUBJECT TO CHANGE TED TO QUANTITY ON HAND CALL TOLL FREE NOW TO PLACE YOUR ORDER 800 782-0022 3132 S HIGHLAND DRIVE VEGAS NEVADA 89109 Radio Technique/Myers Continued page 131 tones pocket pager will almost always sound mushy AM perfectly clear FM Contact District Frequency Coordina tor information loan scanner name will found AMA News sec tion right under District VPs name picture dont know what district Look state listed above VP col umns AMA News George M Myers 70 Froehlich Farm Rd HicksvIIe NY 11801 Good-Bad/Layers Continued page 40 weight behind hinges greater problem becomes Ailerons seem especially susceptible Invest tough heavy materials areas take control surface stresses hinge points control horn mountings Keep rest structure light possible Static dynamic balancing topics another time selecting wood construction gen erally speaking high-density wood tougher heavier low-density wood weaker lighter Select wood its purpose regarding strength weight ailerons mentioned before prefer high-density wood sub-spar mounts hinges low-density trailing edge reduce weight aft hinge line Analyze structure youre building take time select proper materials Lets talk about covering may Strohs man happen MonoKote man covering planes past always felt type covering added undue amount weight pleased find covering accounted 5Yi% total weight came 9 oz5 wing 2 fuselage 1 tail Considering MonoKotes toughness great finish considerable amount strength adds built-up structures think terrific investment weight fact bargain havent tried everything shop around check manufacturers spec sheets weight conscious well color con scious about nice-to-have dontreally-need items some planes lug around plane have exhaust pipe extension keep plane little cleaner C-size onboard booster NiCd convenience Theyre nice have add 3 oz plane may have gone overboard first couple planes used tubular nylon pushrods soon convinced expansion contraction tem perature changes wanted put up Since Ive used hardwood dowel pushrods logic telling larger plane larger dowel should Too late correct now estimate four-dowel pushrods Y16 dia threaded rod ends weigh little dds up Ill have rethink last point wed best close hangar doors Design own planes Think youve got some neat ideas Well think huge windshield neat weighs about 2 oz Doesnt sound bad until call eighth pound thats weightand thats name game See Sunday RC Scale/Wischers Continued page 43 stable air course lack wind during its flights helped model its high placing scoring bonus undercam bered airfoil now debatable subject FAI rules real reason problems such wing its inherent weakness same true very thin wings biplane Shallow depth spars requires made hardwood wire interstrut bracing becomes truly functional Muffler pressure Reliable muffler pressure fuel tank necessity reducing change fuel flow between full emp ty tank have used silicone rubber tube tank filling plugged after filling seal against pressure loss plug prefer machine screw Too coarse thread 134 Model Aviation - sent us tne wrong oraer ana over stocke radios leading sellers Japan identical er 2 Circus 2 radios except label price ALPINAZ BEAT 2 STICK RADIO I
Edition: Model Aviation - 1986/07
Page Numbers: 36, 37, 131, 134
George M Myers 1*5 DISTRICT 9OITUICT 1TUICT -10 flde8 Hawaii ..~icude Pu AMA DISTRICTS District Frequency Coordinators 1 George Wilson 318Fisher-8t werpor MA 201r 2 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 3 James Bearden 5552 Foxrun Ct Cincinnati OH 45239 4 Paul Yacobucci 6708 Winthrop Dr Fayetteville NC 28301 5 Burnis Fields PO Box 1063 Strickland Rd Interlachen FL 32048 8 Loron HoIm 643 Hill Brook Quincy IL 62301 7 Bob Stamm Box 357 Monoqua WI 54548 8 Tom Blakoney 2300 May Ln Grand Prairie TX 75050 9 Steve Mangles Radio Service Center 918 5 Sheridan Denver CO 80226 10 George Steiner 2238 Rogue River Dr Sacramento CA 95826 11 Robert Balch 16439 SE Haig Dr Portland OR 97236 EVERYBODY IS LOOKING perfect Only two flIght stations new chan solution Ideally person should able nels first showed 4-Station Flight Card use RC channel anytime after checking public RC symposium Syracuse NY see isnt already use back February 1983 r new frequencies became effective didnt ex cite much interest audience wasnt hostile either didnt actually boo walk out auditorium fall asleep describing worked got much same reaction present ed other club meetings passed out sample copies finished article published Model Aviation June 1983 page 69 two major defects 72080 Bn/Wh should have placed Yellow flight line avoid image prob lems 72960 Y/Wh other listed other possible problems People didnt want know about problems wanted absolute security Anyhow 1983 Nats run some cases Contest Directors used 4-Station Flight Card People began use new channels good results Interference minimal Time went people occupied new channels idea having two flight stations accommodate new chan nels rejected opened Pandoras box minute three new RC channels began operating simultaneously various intermodulation combinations came play worst 3IM Third-Order Intermodulation triplets enumerated RT February 1986 began receiving reader letters blaming manufacturers FM etc problem really just funda mental characteristic radio transmissions might well know through term Frequency Committee chairman receiving advice pro con matter spelling out triplets finally spelled out after term ended brings question whether person can both Frequency Committee chairman reporter same time FIve flight statIons new RC channels response steadily-increasing number reader letters requesting alternative 4-Station Flight Card put forth five-pin 36 Model Aviation AMA District Frequency CoordInator has shipped JIL SX-200 frequency scanner like club can re quest borrow monitor conditIons field Map left shows AMA districts identifies Frequency Co ordinators youre already well-ac quainted DFC ought Mark Frankels 1/6-scale Lear Jet 35A won its class 1986 WRAM Show Twin Rossi 65s turn Dynamax fans George hears really moves out Ducted fans replacing Heilcopters ultimate challenge RCersand dont think its true George says ought try building flying White model has red blue trim grouping published July 1985 page 34 wasnt perfect either responses peo pie used good have letters indicate hundreds flights no interfer ence problems look can find missed couple 31M triplets flight stations People wanted still flight stations received couple letters people operating Mile Square Los Angeles Ive never seen Mile Square have spoken people have flown Somebody should video place Anyhow showed February 1986 col umn could make up number flight line groupings taking account triplets simple way calculate channels risk goes like 1 Double channel number oper ating transmitter eg RC46 operating calculate 2 x 46 x Subtract channel number other operating transmitter eg RC44 operating too calculate 92 44 Whats left channel number receiver might affected 3IM case RC48 Thanks Fred Marks current Frequency Committee chairman simple calcula tion method Id like make point about Third-Order Intermodulation 3IM can take place transmitters too close together inches apart Solution separate little couple feet can also take place within mixer stage receiver happens can 3IM product signal directly channel demonstrated above However power 3IM product will usually -30 dB 1/1000th power foreign trans mitters signals Now way such weak signal can hurt you let signal transmitter become small enough permit interference Since received power falls off square distance between transmitter receiver solution simple dont let interferers get closer receiver transmitter whole point M-factor January 1986 RT multiplier see type receiver has M 30 31M can expect trouble time transmitter three times further receiver interfering pair Solu don 31M problems Stand close Inter ferers 20 feet dont fly low over antennas luck whole question will go away soon Good transmitter design can practically eliminate transmitter 31M Good receiver design can reduce mixer-generated 3IM products very low levels AMA frequency committee can generate ROC Required Operating Characteristics ROC has desired effect 1988 Continued page 131 Balsa Spruce Plywood Kit Mfg match current prices now paying better quality Open Public 40-60% Discounts Special Month J/J6x4x36.. 54C Price good until July 1 1986 Sal Taibi Mike Taibi AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 MIG OF NISTARTER $2995 Charger PLEASE SPtCIFY WHICH CHARGtR WHEN ORDERING TO RK-STARTER revolutionary concept power iSV glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/b charger has LEO indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment receive free shipping handling TORK-STARTER $2995 Charger 11 tV 22tV 1 2V Fast Charger $2095 Without Charger CHARGERS $1295 Charger Only 1 tOy 220V 12V Fast Chargeri 1301464-2260 UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-13 engines UP5iGNT INVERTED INOINI IT-aOl 1040 1600 JT-601 45-60 1700 JT-901 7543 1900 ToOOS floor redo 00 00770 004 00 Most versatile mufflers ever offered 0 Designed fit inside cowls limIted space can also used HELICOPTERS BOATS 0 For UPRIGHT INVERTED SIDE mounted engines 0 Exhaust tubes point almost direction S Worm drive clamp universal mounting can bolted directly engine BASIC DIMENSIONS INCLUDES Exhaust pipe extensions clamps1402$ 7070$ 007 $90240 worm drive clamp muffler alignment plate gasket mounting screws Oi apSsasSeSevlflEOa5505OS5 155 $770 012400 000736700 070 lOl 00011527 ovoloble hobby shop ORDER DEtECT too Eranedofe shpmenf Check MO Vb Mc coo occepted Add $250 UPS 5200 coo ond 6% soles f05 Calf resident 0BC N Ui U 164 School St Daly CIty CA 94014 415 756-3400 July1986 37 Mon Fri 8am -4pm PSI ALTECH Marketing name Apologies due because slipup last months WRAM Show article wrong importer credited providing Simprop PCM-20 RC system Acorns wheel radio surface models ALTECH Marketing source products US Also price Acorns wheel radio should have given $16495 12421 Ransom Dr Glenn Dale MD 20769 aftIaso ICOINI 1507 $240 07 BOOTS Are Two Sides Story. Both Sides OPS Five Intake Port SLA 60 RC Look Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 37 shortly thereafter should possible fly combination channels con cerning ourselves Image Second- Third-Order Intermodulation Adjacent Chan nel other interferences What about known Interference am lawyer cannot give legal advice doesnt stop having opinions issue now interference What can Con test Director about person shows up contest insists flying RC channel known subject outside inter ference I You can refuse admit person contest AMA Official Model Aircraft Regulations 1986-1987 page 1 Contest Direc tors Authority state addition CD AMA-sanctioned event has authority perform safety inspections equipment prevent participant using equipment CDS opinion deemed unsafe Emphasis added doesnt say CD must perform safety inspections doesnt say CDs opinion has correct says CD has opinion equipment unsafe 2 Suppose person insists flying anyway contestant private citizen using same field What could CD might call police have person ejected arrested disorderly per son approach isnt calculated make friends needs enemies 3 There another way instance may have borrowed districts frequency scanner see photo bought own case need tune bad channel let problem child listen can mad somebody else Over years Ive talked lot about scan ners value someone has listen best time listen time people will flying should obvious surprising number people seem miss point Businesses air during week will often shut down weekends holidays well night So monitoring after 1100 pm because convenient just may will miss signals looking same vein scanner flight line mainly useful four things 1 Verifying channel transmitter radiates Does flag match 2 Verifying channels use pins match 3 Finding transmitters left im pound area 4 Catching two transmitters operating channel want scan outside interference vicinity flight line best way to put scanner car attach outside antenna drive around perimeter field scanner turned Plan route stay mile away flight line minimize interference transmitters use what Bill Hershberger did 85 Nats found new pocket pager 72320 MHz almost goes saying should know what looking An easy way get information perform some tests Have people operate AM FM PCM sets known channels can become accustomed sound Make sure listen both AM FM detector modes because makes difference may surprised discover some RC FM sets make clearer sounds scanner put AM mode other hand Continued page 134 Say0 ~Id T pert iOG 80wio this. fimerS postS IaO9 Matched rsuresaunuu ayalwm TOP PERFORMANCE K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 5 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Mrnrs-Ballsons FILLER KSB SUPER POXY RESIN t&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS July1986 131 Check out local hobby shop Parts People nose length 1 tall moment 2 just looks present flies well think would look less spindly shorter fuselage Box 26247 e New Orleans LA 701860 504242 201 SE 12th Street Pompano Beach FL 33080 305-785-7978 ENGINEERING THE LANDING GEAR PEOPLE Tired kit lading gears deal lit wear higgle preperly O & II Eegieeenng can salve year prahiems * Caste built year needs & specs guaranteed lit * SIring & durable withstand lnnhnal landing * 0 & 0 Engineering gear will work & keep year higie hying * Ia stack rnptacewent gear br mast popular madels Byrne Pills Christen Eagle CAP 21 Balsa USA J-3 CUB Air Tech Pawn Eagle gases Rig Stick Champ Cilabria R & N endels Snapper Slinger cad Snapper Tan Ignition Engirin Parta Only Over 600 items Send *200 current catalog Two channel wheel radio unbeatable performance Servo reversing & end point adjustments both channels Continuously adjustable steering rate Adjustable steering wheel tension lncludes receiver switch harness battery holder Comes withwo JRS5O5 servos Available 2TMHz 9fLV An extremely reliable radio Two channel system cars boats lncludes battery case drycells receiver two JRS5O5 servos Available 27 MHz BOTH RADIOS ARE COVERED BY CIRCUS HOBBIES WARRANTY TAKE ADVANTAGE OF OUR ERROR AND SAVE WHILE SUPPLIES LAST PRICES SUBJECT TO CHANGE TED TO QUANTITY ON HAND CALL TOLL FREE NOW TO PLACE YOUR ORDER 800 782-0022 3132 S HIGHLAND DRIVE VEGAS NEVADA 89109 Radio Technique/Myers Continued page 131 tones pocket pager will almost always sound mushy AM perfectly clear FM Contact District Frequency Coordina tor information loan scanner name will found AMA News sec tion right under District VPs name picture dont know what district Look state listed above VP col umns AMA News George M Myers 70 Froehlich Farm Rd HicksvIIe NY 11801 Good-Bad/Layers Continued page 40 weight behind hinges greater problem becomes Ailerons seem especially susceptible Invest tough heavy materials areas take control surface stresses hinge points control horn mountings Keep rest structure light possible Static dynamic balancing topics another time selecting wood construction gen erally speaking high-density wood tougher heavier low-density wood weaker lighter Select wood its purpose regarding strength weight ailerons mentioned before prefer high-density wood sub-spar mounts hinges low-density trailing edge reduce weight aft hinge line Analyze structure youre building take time select proper materials Lets talk about covering may Strohs man happen MonoKote man covering planes past always felt type covering added undue amount weight pleased find covering accounted 5Yi% total weight came 9 oz5 wing 2 fuselage 1 tail Considering MonoKotes toughness great finish considerable amount strength adds built-up structures think terrific investment weight fact bargain havent tried everything shop around check manufacturers spec sheets weight conscious well color con scious about nice-to-have dontreally-need items some planes lug around plane have exhaust pipe extension keep plane little cleaner C-size onboard booster NiCd convenience Theyre nice have add 3 oz plane may have gone overboard first couple planes used tubular nylon pushrods soon convinced expansion contraction tem perature changes wanted put up Since Ive used hardwood dowel pushrods logic telling larger plane larger dowel should Too late correct now estimate four-dowel pushrods Y16 dia threaded rod ends weigh little dds up Ill have rethink last point wed best close hangar doors Design own planes Think youve got some neat ideas Well think huge windshield neat weighs about 2 oz Doesnt sound bad until call eighth pound thats weightand thats name game See Sunday RC Scale/Wischers Continued page 43 stable air course lack wind during its flights helped model its high placing scoring bonus undercam bered airfoil now debatable subject FAI rules real reason problems such wing its inherent weakness same true very thin wings biplane Shallow depth spars requires made hardwood wire interstrut bracing becomes truly functional Muffler pressure Reliable muffler pressure fuel tank necessity reducing change fuel flow between full emp ty tank have used silicone rubber tube tank filling plugged after filling seal against pressure loss plug prefer machine screw Too coarse thread 134 Model Aviation - sent us tne wrong oraer ana over stocke radios leading sellers Japan identical er 2 Circus 2 radios except label price ALPINAZ BEAT 2 STICK RADIO I
Edition: Model Aviation - 1986/07
Page Numbers: 36, 37, 131, 134
George M Myers 1*5 DISTRICT 9OITUICT 1TUICT -10 flde8 Hawaii ..~icude Pu AMA DISTRICTS District Frequency Coordinators 1 George Wilson 318Fisher-8t werpor MA 201r 2 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 3 James Bearden 5552 Foxrun Ct Cincinnati OH 45239 4 Paul Yacobucci 6708 Winthrop Dr Fayetteville NC 28301 5 Burnis Fields PO Box 1063 Strickland Rd Interlachen FL 32048 8 Loron HoIm 643 Hill Brook Quincy IL 62301 7 Bob Stamm Box 357 Monoqua WI 54548 8 Tom Blakoney 2300 May Ln Grand Prairie TX 75050 9 Steve Mangles Radio Service Center 918 5 Sheridan Denver CO 80226 10 George Steiner 2238 Rogue River Dr Sacramento CA 95826 11 Robert Balch 16439 SE Haig Dr Portland OR 97236 EVERYBODY IS LOOKING perfect Only two flIght stations new chan solution Ideally person should able nels first showed 4-Station Flight Card use RC channel anytime after checking public RC symposium Syracuse NY see isnt already use back February 1983 r new frequencies became effective didnt ex cite much interest audience wasnt hostile either didnt actually boo walk out auditorium fall asleep describing worked got much same reaction present ed other club meetings passed out sample copies finished article published Model Aviation June 1983 page 69 two major defects 72080 Bn/Wh should have placed Yellow flight line avoid image prob lems 72960 Y/Wh other listed other possible problems People didnt want know about problems wanted absolute security Anyhow 1983 Nats run some cases Contest Directors used 4-Station Flight Card People began use new channels good results Interference minimal Time went people occupied new channels idea having two flight stations accommodate new chan nels rejected opened Pandoras box minute three new RC channels began operating simultaneously various intermodulation combinations came play worst 3IM Third-Order Intermodulation triplets enumerated RT February 1986 began receiving reader letters blaming manufacturers FM etc problem really just funda mental characteristic radio transmissions might well know through term Frequency Committee chairman receiving advice pro con matter spelling out triplets finally spelled out after term ended brings question whether person can both Frequency Committee chairman reporter same time FIve flight statIons new RC channels response steadily-increasing number reader letters requesting alternative 4-Station Flight Card put forth five-pin 36 Model Aviation AMA District Frequency CoordInator has shipped JIL SX-200 frequency scanner like club can re quest borrow monitor conditIons field Map left shows AMA districts identifies Frequency Co ordinators youre already well-ac quainted DFC ought Mark Frankels 1/6-scale Lear Jet 35A won its class 1986 WRAM Show Twin Rossi 65s turn Dynamax fans George hears really moves out Ducted fans replacing Heilcopters ultimate challenge RCersand dont think its true George says ought try building flying White model has red blue trim grouping published July 1985 page 34 wasnt perfect either responses peo pie used good have letters indicate hundreds flights no interfer ence problems look can find missed couple 31M triplets flight stations People wanted still flight stations received couple letters people operating Mile Square Los Angeles Ive never seen Mile Square have spoken people have flown Somebody should video place Anyhow showed February 1986 col umn could make up number flight line groupings taking account triplets simple way calculate channels risk goes like 1 Double channel number oper ating transmitter eg RC46 operating calculate 2 x 46 x Subtract channel number other operating transmitter eg RC44 operating too calculate 92 44 Whats left channel number receiver might affected 3IM case RC48 Thanks Fred Marks current Frequency Committee chairman simple calcula tion method Id like make point about Third-Order Intermodulation 3IM can take place transmitters too close together inches apart Solution separate little couple feet can also take place within mixer stage receiver happens can 3IM product signal directly channel demonstrated above However power 3IM product will usually -30 dB 1/1000th power foreign trans mitters signals Now way such weak signal can hurt you let signal transmitter become small enough permit interference Since received power falls off square distance between transmitter receiver solution simple dont let interferers get closer receiver transmitter whole point M-factor January 1986 RT multiplier see type receiver has M 30 31M can expect trouble time transmitter three times further receiver interfering pair Solu don 31M problems Stand close Inter ferers 20 feet dont fly low over antennas luck whole question will go away soon Good transmitter design can practically eliminate transmitter 31M Good receiver design can reduce mixer-generated 3IM products very low levels AMA frequency committee can generate ROC Required Operating Characteristics ROC has desired effect 1988 Continued page 131 Balsa Spruce Plywood Kit Mfg match current prices now paying better quality Open Public 40-60% Discounts Special Month J/J6x4x36.. 54C Price good until July 1 1986 Sal Taibi Mike Taibi AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 MIG OF NISTARTER $2995 Charger PLEASE SPtCIFY WHICH CHARGtR WHEN ORDERING TO RK-STARTER revolutionary concept power iSV glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/b charger has LEO indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment receive free shipping handling TORK-STARTER $2995 Charger 11 tV 22tV 1 2V Fast Charger $2095 Without Charger CHARGERS $1295 Charger Only 1 tOy 220V 12V Fast Chargeri 1301464-2260 UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-13 engines UP5iGNT INVERTED INOINI IT-aOl 1040 1600 JT-601 45-60 1700 JT-901 7543 1900 ToOOS floor redo 00 00770 004 00 Most versatile mufflers ever offered 0 Designed fit inside cowls limIted space can also used HELICOPTERS BOATS 0 For UPRIGHT INVERTED SIDE mounted engines 0 Exhaust tubes point almost direction S Worm drive clamp universal mounting can bolted directly engine BASIC DIMENSIONS INCLUDES Exhaust pipe extensions clamps1402$ 7070$ 007 $90240 worm drive clamp muffler alignment plate gasket mounting screws Oi apSsasSeSevlflEOa5505OS5 155 $770 012400 000736700 070 lOl 00011527 ovoloble hobby shop ORDER DEtECT too Eranedofe shpmenf Check MO Vb Mc coo occepted Add $250 UPS 5200 coo ond 6% soles f05 Calf resident 0BC N Ui U 164 School St Daly CIty CA 94014 415 756-3400 July1986 37 Mon Fri 8am -4pm PSI ALTECH Marketing name Apologies due because slipup last months WRAM Show article wrong importer credited providing Simprop PCM-20 RC system Acorns wheel radio surface models ALTECH Marketing source products US Also price Acorns wheel radio should have given $16495 12421 Ransom Dr Glenn Dale MD 20769 aftIaso ICOINI 1507 $240 07 BOOTS Are Two Sides Story. Both Sides OPS Five Intake Port SLA 60 RC Look Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 37 shortly thereafter should possible fly combination channels con cerning ourselves Image Second- Third-Order Intermodulation Adjacent Chan nel other interferences What about known Interference am lawyer cannot give legal advice doesnt stop having opinions issue now interference What can Con test Director about person shows up contest insists flying RC channel known subject outside inter ference I You can refuse admit person contest AMA Official Model Aircraft Regulations 1986-1987 page 1 Contest Direc tors Authority state addition CD AMA-sanctioned event has authority perform safety inspections equipment prevent participant using equipment CDS opinion deemed unsafe Emphasis added doesnt say CD must perform safety inspections doesnt say CDs opinion has correct says CD has opinion equipment unsafe 2 Suppose person insists flying anyway contestant private citizen using same field What could CD might call police have person ejected arrested disorderly per son approach isnt calculated make friends needs enemies 3 There another way instance may have borrowed districts frequency scanner see photo bought own case need tune bad channel let problem child listen can mad somebody else Over years Ive talked lot about scan ners value someone has listen best time listen time people will flying should obvious surprising number people seem miss point Businesses air during week will often shut down weekends holidays well night So monitoring after 1100 pm because convenient just may will miss signals looking same vein scanner flight line mainly useful four things 1 Verifying channel transmitter radiates Does flag match 2 Verifying channels use pins match 3 Finding transmitters left im pound area 4 Catching two transmitters operating channel want scan outside interference vicinity flight line best way to put scanner car attach outside antenna drive around perimeter field scanner turned Plan route stay mile away flight line minimize interference transmitters use what Bill Hershberger did 85 Nats found new pocket pager 72320 MHz almost goes saying should know what looking An easy way get information perform some tests Have people operate AM FM PCM sets known channels can become accustomed sound Make sure listen both AM FM detector modes because makes difference may surprised discover some RC FM sets make clearer sounds scanner put AM mode other hand Continued page 134 Say0 ~Id T pert iOG 80wio this. fimerS postS IaO9 Matched rsuresaunuu ayalwm TOP PERFORMANCE K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 5 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Mrnrs-Ballsons FILLER KSB SUPER POXY RESIN t&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS July1986 131 Check out local hobby shop Parts People nose length 1 tall moment 2 just looks present flies well think would look less spindly shorter fuselage Box 26247 e New Orleans LA 701860 504242 201 SE 12th Street Pompano Beach FL 33080 305-785-7978 ENGINEERING THE LANDING GEAR PEOPLE Tired kit lading gears deal lit wear higgle preperly O & II Eegieeenng can salve year prahiems * Caste built year needs & specs guaranteed lit * SIring & durable withstand lnnhnal landing * 0 & 0 Engineering gear will work & keep year higie hying * Ia stack rnptacewent gear br mast popular madels Byrne Pills Christen Eagle CAP 21 Balsa USA J-3 CUB Air Tech Pawn Eagle gases Rig Stick Champ Cilabria R & N endels Snapper Slinger cad Snapper Tan Ignition Engirin Parta Only Over 600 items Send *200 current catalog Two channel wheel radio unbeatable performance Servo reversing & end point adjustments both channels Continuously adjustable steering rate Adjustable steering wheel tension lncludes receiver switch harness battery holder Comes withwo JRS5O5 servos Available 2TMHz 9fLV An extremely reliable radio Two channel system cars boats lncludes battery case drycells receiver two JRS5O5 servos Available 27 MHz BOTH RADIOS ARE COVERED BY CIRCUS HOBBIES WARRANTY TAKE ADVANTAGE OF OUR ERROR AND SAVE WHILE SUPPLIES LAST PRICES SUBJECT TO CHANGE TED TO QUANTITY ON HAND CALL TOLL FREE NOW TO PLACE YOUR ORDER 800 782-0022 3132 S HIGHLAND DRIVE VEGAS NEVADA 89109 Radio Technique/Myers Continued page 131 tones pocket pager will almost always sound mushy AM perfectly clear FM Contact District Frequency Coordina tor information loan scanner name will found AMA News sec tion right under District VPs name picture dont know what district Look state listed above VP col umns AMA News George M Myers 70 Froehlich Farm Rd HicksvIIe NY 11801 Good-Bad/Layers Continued page 40 weight behind hinges greater problem becomes Ailerons seem especially susceptible Invest tough heavy materials areas take control surface stresses hinge points control horn mountings Keep rest structure light possible Static dynamic balancing topics another time selecting wood construction gen erally speaking high-density wood tougher heavier low-density wood weaker lighter Select wood its purpose regarding strength weight ailerons mentioned before prefer high-density wood sub-spar mounts hinges low-density trailing edge reduce weight aft hinge line Analyze structure youre building take time select proper materials Lets talk about covering may Strohs man happen MonoKote man covering planes past always felt type covering added undue amount weight pleased find covering accounted 5Yi% total weight came 9 oz5 wing 2 fuselage 1 tail Considering MonoKotes toughness great finish considerable amount strength adds built-up structures think terrific investment weight fact bargain havent tried everything shop around check manufacturers spec sheets weight conscious well color con scious about nice-to-have dontreally-need items some planes lug around plane have exhaust pipe extension keep plane little cleaner C-size onboard booster NiCd convenience Theyre nice have add 3 oz plane may have gone overboard first couple planes used tubular nylon pushrods soon convinced expansion contraction tem perature changes wanted put up Since Ive used hardwood dowel pushrods logic telling larger plane larger dowel should Too late correct now estimate four-dowel pushrods Y16 dia threaded rod ends weigh little dds up Ill have rethink last point wed best close hangar doors Design own planes Think youve got some neat ideas Well think huge windshield neat weighs about 2 oz Doesnt sound bad until call eighth pound thats weightand thats name game See Sunday RC Scale/Wischers Continued page 43 stable air course lack wind during its flights helped model its high placing scoring bonus undercam bered airfoil now debatable subject FAI rules real reason problems such wing its inherent weakness same true very thin wings biplane Shallow depth spars requires made hardwood wire interstrut bracing becomes truly functional Muffler pressure Reliable muffler pressure fuel tank necessity reducing change fuel flow between full emp ty tank have used silicone rubber tube tank filling plugged after filling seal against pressure loss plug prefer machine screw Too coarse thread 134 Model Aviation - sent us tne wrong oraer ana over stocke radios leading sellers Japan identical er 2 Circus 2 radios except label price ALPINAZ BEAT 2 STICK RADIO I
Edition: Model Aviation - 1986/07
Page Numbers: 36, 37, 131, 134
George M Myers 1*5 DISTRICT 9OITUICT 1TUICT -10 flde8 Hawaii ..~icude Pu AMA DISTRICTS District Frequency Coordinators 1 George Wilson 318Fisher-8t werpor MA 201r 2 George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 3 James Bearden 5552 Foxrun Ct Cincinnati OH 45239 4 Paul Yacobucci 6708 Winthrop Dr Fayetteville NC 28301 5 Burnis Fields PO Box 1063 Strickland Rd Interlachen FL 32048 8 Loron HoIm 643 Hill Brook Quincy IL 62301 7 Bob Stamm Box 357 Monoqua WI 54548 8 Tom Blakoney 2300 May Ln Grand Prairie TX 75050 9 Steve Mangles Radio Service Center 918 5 Sheridan Denver CO 80226 10 George Steiner 2238 Rogue River Dr Sacramento CA 95826 11 Robert Balch 16439 SE Haig Dr Portland OR 97236 EVERYBODY IS LOOKING perfect Only two flIght stations new chan solution Ideally person should able nels first showed 4-Station Flight Card use RC channel anytime after checking public RC symposium Syracuse NY see isnt already use back February 1983 r new frequencies became effective didnt ex cite much interest audience wasnt hostile either didnt actually boo walk out auditorium fall asleep describing worked got much same reaction present ed other club meetings passed out sample copies finished article published Model Aviation June 1983 page 69 two major defects 72080 Bn/Wh should have placed Yellow flight line avoid image prob lems 72960 Y/Wh other listed other possible problems People didnt want know about problems wanted absolute security Anyhow 1983 Nats run some cases Contest Directors used 4-Station Flight Card People began use new channels good results Interference minimal Time went people occupied new channels idea having two flight stations accommodate new chan nels rejected opened Pandoras box minute three new RC channels began operating simultaneously various intermodulation combinations came play worst 3IM Third-Order Intermodulation triplets enumerated RT February 1986 began receiving reader letters blaming manufacturers FM etc problem really just funda mental characteristic radio transmissions might well know through term Frequency Committee chairman receiving advice pro con matter spelling out triplets finally spelled out after term ended brings question whether person can both Frequency Committee chairman reporter same time FIve flight statIons new RC channels response steadily-increasing number reader letters requesting alternative 4-Station Flight Card put forth five-pin 36 Model Aviation AMA District Frequency CoordInator has shipped JIL SX-200 frequency scanner like club can re quest borrow monitor conditIons field Map left shows AMA districts identifies Frequency Co ordinators youre already well-ac quainted DFC ought Mark Frankels 1/6-scale Lear Jet 35A won its class 1986 WRAM Show Twin Rossi 65s turn Dynamax fans George hears really moves out Ducted fans replacing Heilcopters ultimate challenge RCersand dont think its true George says ought try building flying White model has red blue trim grouping published July 1985 page 34 wasnt perfect either responses peo pie used good have letters indicate hundreds flights no interfer ence problems look can find missed couple 31M triplets flight stations People wanted still flight stations received couple letters people operating Mile Square Los Angeles Ive never seen Mile Square have spoken people have flown Somebody should video place Anyhow showed February 1986 col umn could make up number flight line groupings taking account triplets simple way calculate channels risk goes like 1 Double channel number oper ating transmitter eg RC46 operating calculate 2 x 46 x Subtract channel number other operating transmitter eg RC44 operating too calculate 92 44 Whats left channel number receiver might affected 3IM case RC48 Thanks Fred Marks current Frequency Committee chairman simple calcula tion method Id like make point about Third-Order Intermodulation 3IM can take place transmitters too close together inches apart Solution separate little couple feet can also take place within mixer stage receiver happens can 3IM product signal directly channel demonstrated above However power 3IM product will usually -30 dB 1/1000th power foreign trans mitters signals Now way such weak signal can hurt you let signal transmitter become small enough permit interference Since received power falls off square distance between transmitter receiver solution simple dont let interferers get closer receiver transmitter whole point M-factor January 1986 RT multiplier see type receiver has M 30 31M can expect trouble time transmitter three times further receiver interfering pair Solu don 31M problems Stand close Inter ferers 20 feet dont fly low over antennas luck whole question will go away soon Good transmitter design can practically eliminate transmitter 31M Good receiver design can reduce mixer-generated 3IM products very low levels AMA frequency committee can generate ROC Required Operating Characteristics ROC has desired effect 1988 Continued page 131 Balsa Spruce Plywood Kit Mfg match current prices now paying better quality Open Public 40-60% Discounts Special Month J/J6x4x36.. 54C Price good until July 1 1986 Sal Taibi Mike Taibi AMA CLUBS Ask about AMA Club Discounts minimum orders $10000 12020 Cent ralia Hawaiian Gardens CA 90716 213 865-3220 MIG OF NISTARTER $2995 Charger PLEASE SPtCIFY WHICH CHARGtR WHEN ORDERING TO RK-STARTER revolutionary concept power iSV glow plugs model cars boats air planes using glow fuel engines TORK-STARTERITMI has steel wrench strong enough reduce compression easier starting supplies power doing comes new C/b charger has LEO indicate unit charging also has removable T handle can used Torque amplifier Over 50 consecutive starts full charge rechargeable hundreds times Clips onto plug positive connection Send ad along prepayment receive free shipping handling TORK-STARTER $2995 Charger 11 tV 22tV 1 2V Fast Charger $2095 Without Charger CHARGERS $1295 Charger Only 1 tOy 220V 12V Fast Chargeri 1301464-2260 UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-13 engines UP5iGNT INVERTED INOINI IT-aOl 1040 1600 JT-601 45-60 1700 JT-901 7543 1900 ToOOS floor redo 00 00770 004 00 Most versatile mufflers ever offered 0 Designed fit inside cowls limIted space can also used HELICOPTERS BOATS 0 For UPRIGHT INVERTED SIDE mounted engines 0 Exhaust tubes point almost direction S Worm drive clamp universal mounting can bolted directly engine BASIC DIMENSIONS INCLUDES Exhaust pipe extensions clamps1402$ 7070$ 007 $90240 worm drive clamp muffler alignment plate gasket mounting screws Oi apSsasSeSevlflEOa5505OS5 155 $770 012400 000736700 070 lOl 00011527 ovoloble hobby shop ORDER DEtECT too Eranedofe shpmenf Check MO Vb Mc coo occepted Add $250 UPS 5200 coo ond 6% soles f05 Calf resident 0BC N Ui U 164 School St Daly CIty CA 94014 415 756-3400 July1986 37 Mon Fri 8am -4pm PSI ALTECH Marketing name Apologies due because slipup last months WRAM Show article wrong importer credited providing Simprop PCM-20 RC system Acorns wheel radio surface models ALTECH Marketing source products US Also price Acorns wheel radio should have given $16495 12421 Ransom Dr Glenn Dale MD 20769 aftIaso ICOINI 1507 $240 07 BOOTS Are Two Sides Story. Both Sides OPS Five Intake Port SLA 60 RC Look Bill Winter 4432 Altura Ct Fairfax VA 22030 Radio Technique/Myers Continued page 37 shortly thereafter should possible fly combination channels con cerning ourselves Image Second- Third-Order Intermodulation Adjacent Chan nel other interferences What about known Interference am lawyer cannot give legal advice doesnt stop having opinions issue now interference What can Con test Director about person shows up contest insists flying RC channel known subject outside inter ference I You can refuse admit person contest AMA Official Model Aircraft Regulations 1986-1987 page 1 Contest Direc tors Authority state addition CD AMA-sanctioned event has authority perform safety inspections equipment prevent participant using equipment CDS opinion deemed unsafe Emphasis added doesnt say CD must perform safety inspections doesnt say CDs opinion has correct says CD has opinion equipment unsafe 2 Suppose person insists flying anyway contestant private citizen using same field What could CD might call police have person ejected arrested disorderly per son approach isnt calculated make friends needs enemies 3 There another way instance may have borrowed districts frequency scanner see photo bought own case need tune bad channel let problem child listen can mad somebody else Over years Ive talked lot about scan ners value someone has listen best time listen time people will flying should obvious surprising number people seem miss point Businesses air during week will often shut down weekends holidays well night So monitoring after 1100 pm because convenient just may will miss signals looking same vein scanner flight line mainly useful four things 1 Verifying channel transmitter radiates Does flag match 2 Verifying channels use pins match 3 Finding transmitters left im pound area 4 Catching two transmitters operating channel want scan outside interference vicinity flight line best way to put scanner car attach outside antenna drive around perimeter field scanner turned Plan route stay mile away flight line minimize interference transmitters use what Bill Hershberger did 85 Nats found new pocket pager 72320 MHz almost goes saying should know what looking An easy way get information perform some tests Have people operate AM FM PCM sets known channels can become accustomed sound Make sure listen both AM FM detector modes because makes difference may surprised discover some RC FM sets make clearer sounds scanner put AM mode other hand Continued page 134 Say0 ~Id T pert iOG 80wio this. fimerS postS IaO9 Matched rsuresaunuu ayalwm TOP PERFORMANCE K&B ENGINtS AirplaneMarine K&B FUELSK&B GLOW PLUGS 5 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Mrnrs-Ballsons FILLER KSB SUPER POXY RESIN t&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS July1986 131 Check out local hobby shop Parts People nose length 1 tall moment 2 just looks present flies well think would look less spindly shorter fuselage Box 26247 e New Orleans LA 701860 504242 201 SE 12th Street Pompano Beach FL 33080 305-785-7978 ENGINEERING THE LANDING GEAR PEOPLE Tired kit lading gears deal lit wear higgle preperly O & II Eegieeenng can salve year prahiems * Caste built year needs & specs guaranteed lit * SIring & durable withstand lnnhnal landing * 0 & 0 Engineering gear will work & keep year higie hying * Ia stack rnptacewent gear br mast popular madels Byrne Pills Christen Eagle CAP 21 Balsa USA J-3 CUB Air Tech Pawn Eagle gases Rig Stick Champ Cilabria R & N endels Snapper Slinger cad Snapper Tan Ignition Engirin Parta Only Over 600 items Send *200 current catalog Two channel wheel radio unbeatable performance Servo reversing & end point adjustments both channels Continuously adjustable steering rate Adjustable steering wheel tension lncludes receiver switch harness battery holder Comes withwo JRS5O5 servos Available 2TMHz 9fLV An extremely reliable radio Two channel system cars boats lncludes battery case drycells receiver two JRS5O5 servos Available 27 MHz BOTH RADIOS ARE COVERED BY CIRCUS HOBBIES WARRANTY TAKE ADVANTAGE OF OUR ERROR AND SAVE WHILE SUPPLIES LAST PRICES SUBJECT TO CHANGE TED TO QUANTITY ON HAND CALL TOLL FREE NOW TO PLACE YOUR ORDER 800 782-0022 3132 S HIGHLAND DRIVE VEGAS NEVADA 89109 Radio Technique/Myers Continued page 131 tones pocket pager will almost always sound mushy AM perfectly clear FM Contact District Frequency Coordina tor information loan scanner name will found AMA News sec tion right under District VPs name picture dont know what district Look state listed above VP col umns AMA News George M Myers 70 Froehlich Farm Rd HicksvIIe NY 11801 Good-Bad/Layers Continued page 40 weight behind hinges greater problem becomes Ailerons seem especially susceptible Invest tough heavy materials areas take control surface stresses hinge points control horn mountings Keep rest structure light possible Static dynamic balancing topics another time selecting wood construction gen erally speaking high-density wood tougher heavier low-density wood weaker lighter Select wood its purpose regarding strength weight ailerons mentioned before prefer high-density wood sub-spar mounts hinges low-density trailing edge reduce weight aft hinge line Analyze structure youre building take time select proper materials Lets talk about covering may Strohs man happen MonoKote man covering planes past always felt type covering added undue amount weight pleased find covering accounted 5Yi% total weight came 9 oz5 wing 2 fuselage 1 tail Considering MonoKotes toughness great finish considerable amount strength adds built-up structures think terrific investment weight fact bargain havent tried everything shop around check manufacturers spec sheets weight conscious well color con scious about nice-to-have dontreally-need items some planes lug around plane have exhaust pipe extension keep plane little cleaner C-size onboard booster NiCd convenience Theyre nice have add 3 oz plane may have gone overboard first couple planes used tubular nylon pushrods soon convinced expansion contraction tem perature changes wanted put up Since Ive used hardwood dowel pushrods logic telling larger plane larger dowel should Too late correct now estimate four-dowel pushrods Y16 dia threaded rod ends weigh little dds up Ill have rethink last point wed best close hangar doors Design own planes Think youve got some neat ideas Well think huge windshield neat weighs about 2 oz Doesnt sound bad until call eighth pound thats weightand thats name game See Sunday RC Scale/Wischers Continued page 43 stable air course lack wind during its flights helped model its high placing scoring bonus undercam bered airfoil now debatable subject FAI rules real reason problems such wing its inherent weakness same true very thin wings biplane Shallow depth spars requires made hardwood wire interstrut bracing becomes truly functional Muffler pressure Reliable muffler pressure fuel tank necessity reducing change fuel flow between full emp ty tank have used silicone rubber tube tank filling plugged after filling seal against pressure loss plug prefer machine screw Too coarse thread 134 Model Aviation - sent us tne wrong oraer ana over stocke radios leading sellers Japan identical er 2 Circus 2 radios except label price ALPINAZ BEAT 2 STICK RADIO I