I SPENT pleasant lunch-hour discussing servo-reversing techniques Bob Ab erie Bob reviews radios Flying Models magazine probably knows what being offered various manufacturers better salesman also owns latest equipment including Kraft Signature system bought last year partly because kept urging him spend money As result other discussions came agreement someone has missed point servoreversing methods sent market want plane adjusted fit transmitter vice-versa Before showing what decided would reasonable consider deed can done Servo-reversing term will use describe method can used change direction motion control surface eg elevator respect given motion control stick transmitter Servo-reversing can intro duced several points link hand control surface wit 1 control stick 2 Inside transmitter electronic package 3 Inside receiver electronic package 4 Between receiver servo 5 Inside servo electronic package 6 servo/pushrod interface 7 control surface Last month showed Hank Prew performed servo-reversing MRC772 removing stick assembly re-installing rotated 1800 its original position sets can reversed manner primary disadvantage method location trim lever changes Personally find variety trim-lever locations biggest nuisances face teaching others fly RC have reach looking need such first test flight someone elses plane cant find So method cheap quick easy has better way 1 It might possible cut leads stick potentiometer install nonpolarized 3-pin plug can simply reverse plug reverse action will have re-zero system some way servo can re-zeroed pushing screw-driver hex-wrench down hole left removing screw attaches output wheel might good way thing will spread wear servo-potentiometer track disad vantage have open up both transmitter airplane make changes Another way would add electrical trim inside transmitter case 2 Im going skip over possible electronic revisions transmitter receiver moment because dont have simple circuits readers can incorporate existing sets However need refer Kraft ads see Signature incorporates servoreversing front-panel switch Fig 1 panel also includes servo-span ad justment dual-rate feature Bob tells saves least days building time time uses Signature because installs servos fit best runs pushrods out way after everything buttoned down plane sitting its wheels sets up servo directions spans sitting comfortably easy chair transmitter lap Boy 18 Model Aviation FIg 1 Control panel Bobs Kraft Signature shows extra control adjustments have make because can make Ideal type transmitter someone has move design another times year Bob does Once get comfortable box can fly anything wIth 01 George has hIs crates wall trimmed just grab Fig2 ACE RIC Bantam Midget machinery Bantam case some servo reversing options considered text topto bottom servo DIP switch Noble switch prototype servo reverser Text covers variety ways achieve servo reversing some guys rub dont snake Eden also least three friends have managed put some dents aircraft using Signature systems knob provided permits make adjustment darned well better make So still see people trying fly reversed ailerons dont Bob 3 Next attract attention receiver small increase price would possible include servo-reversing part decoder Now opinion real opportunity lies Assuming have 3-wire servos two options First would change servo plugs 5-wire unpolarized types 5-wire receptacle could easily wired receiver plugging servo way would give clockwise rotation output wheel inverting plug socket would give counter-clockwise rotation disadvant age scheme price fact will have remove wing get plugs forget reverse servo advantage once get airplane right stays way poten tial aileron reversal can eliminated using polarized 3-pin connector aileron extension cable dont like 5-pin solution also possible have separate 3-pin sockets clockwise counter-clockwise rotation piece tape over unused sockets eliminates aileron reversal problem servos need changed 4 Several manufacturers make in-line servo reversers need open connection between receiver servo insert items accomplish servo-reversing advantage approach dont have change anything disadvantage have extra bulk dollars weight deal 5 & 6 Finally come servo itself obvious thing faced Continued page 98 April1979 19 RC filers need practice safe reliable operation need Important comes toAirShowteamsthe Image portray affects us Photo lastysars Nats shows mnbers Florida Air Show Team Col Art Johnson controls checking Flying kt-k 4or properly closedused tow banners opening end show Flying ira Taurus IIlana ruaaersuDoorsal Tin sweptoacwings wiin vorKexrIIps upur Poxy fuselage Power Supertlgre 80 floatsso perhaps too demanding A-i Congratuiating other after successfui flight giant model C-130 Lockheed Hercules Cpl Tax Bryson L pilot Sgt Dennis Scott both Royal Australian Air Force presently operates 24 130s Hercules has wingspan 138 118 long weighs 264 lbs first flight made Edinburgh Airfield near Adelaide saw perfect takeoff six big circuits touch down just iike real thing Insured $5000 perfect reproduction Hercules lighting seating capable making 48 model-man parachute drop Openers/Winter continued page 72 have something tell As RCer FOs chief interest CL Racing frantic aerobatics pilots center circle will find Bill Lee CL Racing talking about home-made fibreglass props Bill Wynn Paul too guy endlessly seeks truth about tanks things like props doing experimenting finding para meters Dave Chesney writes beautifully RC Helicopters column existence now Bill Warner Sport/Scale will put humor life flying circus note others gang Without guys like us would never know about hundreds things add up sum total skills Brad Powers lead article floats quarter-scale landmark article Model aviation old century yet explosion knowledge techniques products never dared dream about what know about floats would fit smallest drawer field box So designer partook dozens famous pro jects made history modeler boot telling us design float virtually size modelas well monsters weve yet see water Note feed-inIrwin Ohlsson great Ernie Stout Convair fame What suggesting dear friend April issue however excep tional 12 year talking about magazine Within another yearGod willingit will thousand light years beyond April 1976 MA began July 1975 its modern form ask conscious magazine contro versial terms some other magazines have shown theyd like see deadbut inspect closely what speak especially minority members did subscribe MA past yours wed like proud AS WE GO TO PRESS sad news ar rives passing Myron Mike Schlesinger recent past president Top Flite Models Mike respected friend industry innumerable modelers true pioneer helped start Top Flite its way chaired trade show committee 1956 became member HIAAs board directors served nearly 10 years chairman co-chairman HIAAs Model Aeronautics Division Hu morous easy going always compassion ate understanding Mike Schlesinger will truly missed us Floats Powers continued page 17 actual floats installed Citabria model together summary results some photos Irwin Ohlsson thirties deve loped line famous Ohlsson engines now retired builds beautiful model seaplanes has given pair floats developed has found very satisfactory straightforward design have generous step landing angle embody progressive deadrise Rather present float complete its displacement Center Buoyancy etc ready determined will give its dimensions trim another guesstimate draft 16 40 percent its beam data procedures already discussed up find answers problems Fig 6 shows float answers will found illustration Answers Float Prob lems Finally wish express thanks Ernest G Stout former Chief Hydrody namics Convair worked interesting projects sistance providing data presented herein Now am going start building float build finish before write let know works can de cide whether stay leave Tierra Del Fuego RC Technique/Myers continued page 19 control thats going wrong way move pushrod hole opposite side output wheel frequently make such change field someone needs disadvantage approach pushrods usually get tangled you end up product review product review product review Radial Engines man has thingultra deluxe 57-cylinder scale-like engines /4 scale 4-cycle high-torque swing 16-8 through 20-6 props Low vibra tion low fuel consumption mild glow fuel 6-in diameter 23 oz weight 7cylinder engines offered 3 versionspol ished aluminum anodized black deluxe Collectors Gold Edition package trimmed 14K gold Manufacturer states fully opera tional warranted 90 dayssold direct Executive Engines Co 16650 S 104th Ave Orland Park IL 60462 product review product review product review swapping rudder elevator servos side-by-side using Nyrod often finds surgery neces sary because outer shell has anchored location doesnt allow shift connection other side wheel Wouldnt nice could just throw reversing switch servo point Bobs eyes lit up Ill bet Ace R/C Bantam Midget machinery will fit regular Bantam case says leave enough room servo reverser dont see what can idea George kicked around some possibilities until time get back work few days later Bantam case Bantam Midget servo appeared desk magic Christmas came bit early year thought until Bob told wanted back after youve finished rever sing switch first thought make use 16pin DIP switch After little consideration possibilities left open direct short across batteries dropped idea Besides switch too big Next tried 4PDT Noble switch commonly used switch harnesses RC systems can made fit little help Dremel problem will have take out servo get switch smaller switch could mounted right out open can get couldnt find Slightly later Bob left another goodie desk prototype servo reverser ACE R/C few mods could fit space available would left servo having two pigtails rotation Plug need configuration left project returned servo Bob must careful let unused plug short out metal parts because will short out batteries kill whole system As said before like idea having servo reverser receiver todays IC circuitry major configuration change would adding second set sockets other rotation Its fair mention Kraft has shipping sets 10 years have two servos set up direction Editors NoteLike feature Cox-Sanwa get what want swapping around dot no dot servos dot tiny circle molded mounting flange between cutouts grommets Once get flight pack set up right theres no way make mistake Thats way like things Over years have bought flight packs transmitters work plane until control trims throws right transmitter trim levers center position leave everything alone until needs service way can pick plane off wall go flying worrying its compatible 98 Model Aviation transmitter crystals match will work way becomes familiar comfortable transmitter feel very short time flying becomes auto matic Oh want know about 7 Revers ing Control Surface can cross aileron pushrods put rudder control horn opposite side Great ideas think building same goes elevator could put control horn top belongs pulling out dive puts highest load elevator pushrod rod would tension rather compression couldnt buckle worst possible moment Keep letters coming friends Ive fortunate enough receive some very nice ones recently worth mentioning came Ron Smith AMA 83995 & WA4JNX Ron sent Official Mem bership Certificate Honorary Tarrant Amateur Repeater Assoc contingent obtaining Technicians License spoke earlier column will have tell obtaining Tech License soon think will like what see hear Keep watching George Myers 70 Froehlich Farm Rd Hicksville NY 11801 mgs epoxied place panel Make wing strut 031 galvanized steel fittings attach wing yet spar root ends cut shown Save-A-Plane Downed aircraft locateralso functions range checker receiver-on indicatorwill sound horn can heard long distances hours low-battery drain Small size weight permits installa tion almost plane Works positive negative pulse 3-or 4-wire system Battery drain less 100 microamps 20 MA at5V 40 MA 9V horn Size 103 dia 1095 depth weight 25 grams less 1 oz Sound output 80dB 3 ft $1995 Save-A-Plane Box 344 Cos Cob CT 06807 product review product review product review Holes rubber hooks drilled blind nuts epoxied Wing Strut Rigging struts need no explanation Once made con nect wings fuselage rubber bands between hooks Lay fuselage wings upside down flat surface Make cardboard template check 1 ee scale dihedral between fuselage sides wing spars bottom Block up whole ship underneath dihedral correct about 2 degrees washout wing tips Attach bottom strut hooks fuselage strut fittings locate wing strut fittings spars Attach bolts shown Covering The sanding high points very careful checking points contact between framework covering can make difference between first last place contest added time required well worth Fairchild covered flat aircraft aluminum MonoKote covering makes very realistic finish model very much harder use regular Mono Kote fact Sid Axekod Top-Flite said stopped making dull surface covering fact having paint has much appeal Anyone dedicated making scale model wont object silk dope etc Flying I first flew FC-2 very early April 1979 99 THE KIT IS NOW AVAILABLE 2hE L 34G15 Ace Digipace assembled $9495 34G16Ace Digipace kit Please send complete catalog Enclosed SI 00 refunded myNAAIE first order Add 150 1st clan nuilADDRESS return add S1U handling other nrderscify NOW WHAT EVERYONES BEEN WAITING FOR sophisticated piece . pment cycling ni-cd batteries Accurate dependable attractive --Automatic discharging recharging both re ceiver transmitter batteries simultaneously independently Switch three different transmitter voltages 6V 96V 12V --Switch two different receiver charge rates 20 ma 50 ma --Four digit LED readout no mechanical clock motors --Modern design tight tolerance components sure total accuracy down 10/0 1/10 minute --Available kit form assembled tested BOX 511E HIGGINSVILLE MO 7995 STATE Fairchild/Clapp continued page 27 product review product review product review writing advertisers mention read about Model Aviation
Edition: Model Aviation - 1979/04
Page Numbers: 18, 19, 98, 99
I SPENT pleasant lunch-hour discussing servo-reversing techniques Bob Ab erie Bob reviews radios Flying Models magazine probably knows what being offered various manufacturers better salesman also owns latest equipment including Kraft Signature system bought last year partly because kept urging him spend money As result other discussions came agreement someone has missed point servoreversing methods sent market want plane adjusted fit transmitter vice-versa Before showing what decided would reasonable consider deed can done Servo-reversing term will use describe method can used change direction motion control surface eg elevator respect given motion control stick transmitter Servo-reversing can intro duced several points link hand control surface wit 1 control stick 2 Inside transmitter electronic package 3 Inside receiver electronic package 4 Between receiver servo 5 Inside servo electronic package 6 servo/pushrod interface 7 control surface Last month showed Hank Prew performed servo-reversing MRC772 removing stick assembly re-installing rotated 1800 its original position sets can reversed manner primary disadvantage method location trim lever changes Personally find variety trim-lever locations biggest nuisances face teaching others fly RC have reach looking need such first test flight someone elses plane cant find So method cheap quick easy has better way 1 It might possible cut leads stick potentiometer install nonpolarized 3-pin plug can simply reverse plug reverse action will have re-zero system some way servo can re-zeroed pushing screw-driver hex-wrench down hole left removing screw attaches output wheel might good way thing will spread wear servo-potentiometer track disad vantage have open up both transmitter airplane make changes Another way would add electrical trim inside transmitter case 2 Im going skip over possible electronic revisions transmitter receiver moment because dont have simple circuits readers can incorporate existing sets However need refer Kraft ads see Signature incorporates servoreversing front-panel switch Fig 1 panel also includes servo-span ad justment dual-rate feature Bob tells saves least days building time time uses Signature because installs servos fit best runs pushrods out way after everything buttoned down plane sitting its wheels sets up servo directions spans sitting comfortably easy chair transmitter lap Boy 18 Model Aviation FIg 1 Control panel Bobs Kraft Signature shows extra control adjustments have make because can make Ideal type transmitter someone has move design another times year Bob does Once get comfortable box can fly anything wIth 01 George has hIs crates wall trimmed just grab Fig2 ACE RIC Bantam Midget machinery Bantam case some servo reversing options considered text topto bottom servo DIP switch Noble switch prototype servo reverser Text covers variety ways achieve servo reversing some guys rub dont snake Eden also least three friends have managed put some dents aircraft using Signature systems knob provided permits make adjustment darned well better make So still see people trying fly reversed ailerons dont Bob 3 Next attract attention receiver small increase price would possible include servo-reversing part decoder Now opinion real opportunity lies Assuming have 3-wire servos two options First would change servo plugs 5-wire unpolarized types 5-wire receptacle could easily wired receiver plugging servo way would give clockwise rotation output wheel inverting plug socket would give counter-clockwise rotation disadvant age scheme price fact will have remove wing get plugs forget reverse servo advantage once get airplane right stays way poten tial aileron reversal can eliminated using polarized 3-pin connector aileron extension cable dont like 5-pin solution also possible have separate 3-pin sockets clockwise counter-clockwise rotation piece tape over unused sockets eliminates aileron reversal problem servos need changed 4 Several manufacturers make in-line servo reversers need open connection between receiver servo insert items accomplish servo-reversing advantage approach dont have change anything disadvantage have extra bulk dollars weight deal 5 & 6 Finally come servo itself obvious thing faced Continued page 98 April1979 19 RC filers need practice safe reliable operation need Important comes toAirShowteamsthe Image portray affects us Photo lastysars Nats shows mnbers Florida Air Show Team Col Art Johnson controls checking Flying kt-k 4or properly closedused tow banners opening end show Flying ira Taurus IIlana ruaaersuDoorsal Tin sweptoacwings wiin vorKexrIIps upur Poxy fuselage Power Supertlgre 80 floatsso perhaps too demanding A-i Congratuiating other after successfui flight giant model C-130 Lockheed Hercules Cpl Tax Bryson L pilot Sgt Dennis Scott both Royal Australian Air Force presently operates 24 130s Hercules has wingspan 138 118 long weighs 264 lbs first flight made Edinburgh Airfield near Adelaide saw perfect takeoff six big circuits touch down just iike real thing Insured $5000 perfect reproduction Hercules lighting seating capable making 48 model-man parachute drop Openers/Winter continued page 72 have something tell As RCer FOs chief interest CL Racing frantic aerobatics pilots center circle will find Bill Lee CL Racing talking about home-made fibreglass props Bill Wynn Paul too guy endlessly seeks truth about tanks things like props doing experimenting finding para meters Dave Chesney writes beautifully RC Helicopters column existence now Bill Warner Sport/Scale will put humor life flying circus note others gang Without guys like us would never know about hundreds things add up sum total skills Brad Powers lead article floats quarter-scale landmark article Model aviation old century yet explosion knowledge techniques products never dared dream about what know about floats would fit smallest drawer field box So designer partook dozens famous pro jects made history modeler boot telling us design float virtually size modelas well monsters weve yet see water Note feed-inIrwin Ohlsson great Ernie Stout Convair fame What suggesting dear friend April issue however excep tional 12 year talking about magazine Within another yearGod willingit will thousand light years beyond April 1976 MA began July 1975 its modern form ask conscious magazine contro versial terms some other magazines have shown theyd like see deadbut inspect closely what speak especially minority members did subscribe MA past yours wed like proud AS WE GO TO PRESS sad news ar rives passing Myron Mike Schlesinger recent past president Top Flite Models Mike respected friend industry innumerable modelers true pioneer helped start Top Flite its way chaired trade show committee 1956 became member HIAAs board directors served nearly 10 years chairman co-chairman HIAAs Model Aeronautics Division Hu morous easy going always compassion ate understanding Mike Schlesinger will truly missed us Floats Powers continued page 17 actual floats installed Citabria model together summary results some photos Irwin Ohlsson thirties deve loped line famous Ohlsson engines now retired builds beautiful model seaplanes has given pair floats developed has found very satisfactory straightforward design have generous step landing angle embody progressive deadrise Rather present float complete its displacement Center Buoyancy etc ready determined will give its dimensions trim another guesstimate draft 16 40 percent its beam data procedures already discussed up find answers problems Fig 6 shows float answers will found illustration Answers Float Prob lems Finally wish express thanks Ernest G Stout former Chief Hydrody namics Convair worked interesting projects sistance providing data presented herein Now am going start building float build finish before write let know works can de cide whether stay leave Tierra Del Fuego RC Technique/Myers continued page 19 control thats going wrong way move pushrod hole opposite side output wheel frequently make such change field someone needs disadvantage approach pushrods usually get tangled you end up product review product review product review Radial Engines man has thingultra deluxe 57-cylinder scale-like engines /4 scale 4-cycle high-torque swing 16-8 through 20-6 props Low vibra tion low fuel consumption mild glow fuel 6-in diameter 23 oz weight 7cylinder engines offered 3 versionspol ished aluminum anodized black deluxe Collectors Gold Edition package trimmed 14K gold Manufacturer states fully opera tional warranted 90 dayssold direct Executive Engines Co 16650 S 104th Ave Orland Park IL 60462 product review product review product review swapping rudder elevator servos side-by-side using Nyrod often finds surgery neces sary because outer shell has anchored location doesnt allow shift connection other side wheel Wouldnt nice could just throw reversing switch servo point Bobs eyes lit up Ill bet Ace R/C Bantam Midget machinery will fit regular Bantam case says leave enough room servo reverser dont see what can idea George kicked around some possibilities until time get back work few days later Bantam case Bantam Midget servo appeared desk magic Christmas came bit early year thought until Bob told wanted back after youve finished rever sing switch first thought make use 16pin DIP switch After little consideration possibilities left open direct short across batteries dropped idea Besides switch too big Next tried 4PDT Noble switch commonly used switch harnesses RC systems can made fit little help Dremel problem will have take out servo get switch smaller switch could mounted right out open can get couldnt find Slightly later Bob left another goodie desk prototype servo reverser ACE R/C few mods could fit space available would left servo having two pigtails rotation Plug need configuration left project returned servo Bob must careful let unused plug short out metal parts because will short out batteries kill whole system As said before like idea having servo reverser receiver todays IC circuitry major configuration change would adding second set sockets other rotation Its fair mention Kraft has shipping sets 10 years have two servos set up direction Editors NoteLike feature Cox-Sanwa get what want swapping around dot no dot servos dot tiny circle molded mounting flange between cutouts grommets Once get flight pack set up right theres no way make mistake Thats way like things Over years have bought flight packs transmitters work plane until control trims throws right transmitter trim levers center position leave everything alone until needs service way can pick plane off wall go flying worrying its compatible 98 Model Aviation transmitter crystals match will work way becomes familiar comfortable transmitter feel very short time flying becomes auto matic Oh want know about 7 Revers ing Control Surface can cross aileron pushrods put rudder control horn opposite side Great ideas think building same goes elevator could put control horn top belongs pulling out dive puts highest load elevator pushrod rod would tension rather compression couldnt buckle worst possible moment Keep letters coming friends Ive fortunate enough receive some very nice ones recently worth mentioning came Ron Smith AMA 83995 & WA4JNX Ron sent Official Mem bership Certificate Honorary Tarrant Amateur Repeater Assoc contingent obtaining Technicians License spoke earlier column will have tell obtaining Tech License soon think will like what see hear Keep watching George Myers 70 Froehlich Farm Rd Hicksville NY 11801 mgs epoxied place panel Make wing strut 031 galvanized steel fittings attach wing yet spar root ends cut shown Save-A-Plane Downed aircraft locateralso functions range checker receiver-on indicatorwill sound horn can heard long distances hours low-battery drain Small size weight permits installa tion almost plane Works positive negative pulse 3-or 4-wire system Battery drain less 100 microamps 20 MA at5V 40 MA 9V horn Size 103 dia 1095 depth weight 25 grams less 1 oz Sound output 80dB 3 ft $1995 Save-A-Plane Box 344 Cos Cob CT 06807 product review product review product review Holes rubber hooks drilled blind nuts epoxied Wing Strut Rigging struts need no explanation Once made con nect wings fuselage rubber bands between hooks Lay fuselage wings upside down flat surface Make cardboard template check 1 ee scale dihedral between fuselage sides wing spars bottom Block up whole ship underneath dihedral correct about 2 degrees washout wing tips Attach bottom strut hooks fuselage strut fittings locate wing strut fittings spars Attach bolts shown Covering The sanding high points very careful checking points contact between framework covering can make difference between first last place contest added time required well worth Fairchild covered flat aircraft aluminum MonoKote covering makes very realistic finish model very much harder use regular Mono Kote fact Sid Axekod Top-Flite said stopped making dull surface covering fact having paint has much appeal Anyone dedicated making scale model wont object silk dope etc Flying I first flew FC-2 very early April 1979 99 THE KIT IS NOW AVAILABLE 2hE L 34G15 Ace Digipace assembled $9495 34G16Ace Digipace kit Please send complete catalog Enclosed SI 00 refunded myNAAIE first order Add 150 1st clan nuilADDRESS return add S1U handling other nrderscify NOW WHAT EVERYONES BEEN WAITING FOR sophisticated piece . pment cycling ni-cd batteries Accurate dependable attractive --Automatic discharging recharging both re ceiver transmitter batteries simultaneously independently Switch three different transmitter voltages 6V 96V 12V --Switch two different receiver charge rates 20 ma 50 ma --Four digit LED readout no mechanical clock motors --Modern design tight tolerance components sure total accuracy down 10/0 1/10 minute --Available kit form assembled tested BOX 511E HIGGINSVILLE MO 7995 STATE Fairchild/Clapp continued page 27 product review product review product review writing advertisers mention read about Model Aviation
Edition: Model Aviation - 1979/04
Page Numbers: 18, 19, 98, 99
I SPENT pleasant lunch-hour discussing servo-reversing techniques Bob Ab erie Bob reviews radios Flying Models magazine probably knows what being offered various manufacturers better salesman also owns latest equipment including Kraft Signature system bought last year partly because kept urging him spend money As result other discussions came agreement someone has missed point servoreversing methods sent market want plane adjusted fit transmitter vice-versa Before showing what decided would reasonable consider deed can done Servo-reversing term will use describe method can used change direction motion control surface eg elevator respect given motion control stick transmitter Servo-reversing can intro duced several points link hand control surface wit 1 control stick 2 Inside transmitter electronic package 3 Inside receiver electronic package 4 Between receiver servo 5 Inside servo electronic package 6 servo/pushrod interface 7 control surface Last month showed Hank Prew performed servo-reversing MRC772 removing stick assembly re-installing rotated 1800 its original position sets can reversed manner primary disadvantage method location trim lever changes Personally find variety trim-lever locations biggest nuisances face teaching others fly RC have reach looking need such first test flight someone elses plane cant find So method cheap quick easy has better way 1 It might possible cut leads stick potentiometer install nonpolarized 3-pin plug can simply reverse plug reverse action will have re-zero system some way servo can re-zeroed pushing screw-driver hex-wrench down hole left removing screw attaches output wheel might good way thing will spread wear servo-potentiometer track disad vantage have open up both transmitter airplane make changes Another way would add electrical trim inside transmitter case 2 Im going skip over possible electronic revisions transmitter receiver moment because dont have simple circuits readers can incorporate existing sets However need refer Kraft ads see Signature incorporates servoreversing front-panel switch Fig 1 panel also includes servo-span ad justment dual-rate feature Bob tells saves least days building time time uses Signature because installs servos fit best runs pushrods out way after everything buttoned down plane sitting its wheels sets up servo directions spans sitting comfortably easy chair transmitter lap Boy 18 Model Aviation FIg 1 Control panel Bobs Kraft Signature shows extra control adjustments have make because can make Ideal type transmitter someone has move design another times year Bob does Once get comfortable box can fly anything wIth 01 George has hIs crates wall trimmed just grab Fig2 ACE RIC Bantam Midget machinery Bantam case some servo reversing options considered text topto bottom servo DIP switch Noble switch prototype servo reverser Text covers variety ways achieve servo reversing some guys rub dont snake Eden also least three friends have managed put some dents aircraft using Signature systems knob provided permits make adjustment darned well better make So still see people trying fly reversed ailerons dont Bob 3 Next attract attention receiver small increase price would possible include servo-reversing part decoder Now opinion real opportunity lies Assuming have 3-wire servos two options First would change servo plugs 5-wire unpolarized types 5-wire receptacle could easily wired receiver plugging servo way would give clockwise rotation output wheel inverting plug socket would give counter-clockwise rotation disadvant age scheme price fact will have remove wing get plugs forget reverse servo advantage once get airplane right stays way poten tial aileron reversal can eliminated using polarized 3-pin connector aileron extension cable dont like 5-pin solution also possible have separate 3-pin sockets clockwise counter-clockwise rotation piece tape over unused sockets eliminates aileron reversal problem servos need changed 4 Several manufacturers make in-line servo reversers need open connection between receiver servo insert items accomplish servo-reversing advantage approach dont have change anything disadvantage have extra bulk dollars weight deal 5 & 6 Finally come servo itself obvious thing faced Continued page 98 April1979 19 RC filers need practice safe reliable operation need Important comes toAirShowteamsthe Image portray affects us Photo lastysars Nats shows mnbers Florida Air Show Team Col Art Johnson controls checking Flying kt-k 4or properly closedused tow banners opening end show Flying ira Taurus IIlana ruaaersuDoorsal Tin sweptoacwings wiin vorKexrIIps upur Poxy fuselage Power Supertlgre 80 floatsso perhaps too demanding A-i Congratuiating other after successfui flight giant model C-130 Lockheed Hercules Cpl Tax Bryson L pilot Sgt Dennis Scott both Royal Australian Air Force presently operates 24 130s Hercules has wingspan 138 118 long weighs 264 lbs first flight made Edinburgh Airfield near Adelaide saw perfect takeoff six big circuits touch down just iike real thing Insured $5000 perfect reproduction Hercules lighting seating capable making 48 model-man parachute drop Openers/Winter continued page 72 have something tell As RCer FOs chief interest CL Racing frantic aerobatics pilots center circle will find Bill Lee CL Racing talking about home-made fibreglass props Bill Wynn Paul too guy endlessly seeks truth about tanks things like props doing experimenting finding para meters Dave Chesney writes beautifully RC Helicopters column existence now Bill Warner Sport/Scale will put humor life flying circus note others gang Without guys like us would never know about hundreds things add up sum total skills Brad Powers lead article floats quarter-scale landmark article Model aviation old century yet explosion knowledge techniques products never dared dream about what know about floats would fit smallest drawer field box So designer partook dozens famous pro jects made history modeler boot telling us design float virtually size modelas well monsters weve yet see water Note feed-inIrwin Ohlsson great Ernie Stout Convair fame What suggesting dear friend April issue however excep tional 12 year talking about magazine Within another yearGod willingit will thousand light years beyond April 1976 MA began July 1975 its modern form ask conscious magazine contro versial terms some other magazines have shown theyd like see deadbut inspect closely what speak especially minority members did subscribe MA past yours wed like proud AS WE GO TO PRESS sad news ar rives passing Myron Mike Schlesinger recent past president Top Flite Models Mike respected friend industry innumerable modelers true pioneer helped start Top Flite its way chaired trade show committee 1956 became member HIAAs board directors served nearly 10 years chairman co-chairman HIAAs Model Aeronautics Division Hu morous easy going always compassion ate understanding Mike Schlesinger will truly missed us Floats Powers continued page 17 actual floats installed Citabria model together summary results some photos Irwin Ohlsson thirties deve loped line famous Ohlsson engines now retired builds beautiful model seaplanes has given pair floats developed has found very satisfactory straightforward design have generous step landing angle embody progressive deadrise Rather present float complete its displacement Center Buoyancy etc ready determined will give its dimensions trim another guesstimate draft 16 40 percent its beam data procedures already discussed up find answers problems Fig 6 shows float answers will found illustration Answers Float Prob lems Finally wish express thanks Ernest G Stout former Chief Hydrody namics Convair worked interesting projects sistance providing data presented herein Now am going start building float build finish before write let know works can de cide whether stay leave Tierra Del Fuego RC Technique/Myers continued page 19 control thats going wrong way move pushrod hole opposite side output wheel frequently make such change field someone needs disadvantage approach pushrods usually get tangled you end up product review product review product review Radial Engines man has thingultra deluxe 57-cylinder scale-like engines /4 scale 4-cycle high-torque swing 16-8 through 20-6 props Low vibra tion low fuel consumption mild glow fuel 6-in diameter 23 oz weight 7cylinder engines offered 3 versionspol ished aluminum anodized black deluxe Collectors Gold Edition package trimmed 14K gold Manufacturer states fully opera tional warranted 90 dayssold direct Executive Engines Co 16650 S 104th Ave Orland Park IL 60462 product review product review product review swapping rudder elevator servos side-by-side using Nyrod often finds surgery neces sary because outer shell has anchored location doesnt allow shift connection other side wheel Wouldnt nice could just throw reversing switch servo point Bobs eyes lit up Ill bet Ace R/C Bantam Midget machinery will fit regular Bantam case says leave enough room servo reverser dont see what can idea George kicked around some possibilities until time get back work few days later Bantam case Bantam Midget servo appeared desk magic Christmas came bit early year thought until Bob told wanted back after youve finished rever sing switch first thought make use 16pin DIP switch After little consideration possibilities left open direct short across batteries dropped idea Besides switch too big Next tried 4PDT Noble switch commonly used switch harnesses RC systems can made fit little help Dremel problem will have take out servo get switch smaller switch could mounted right out open can get couldnt find Slightly later Bob left another goodie desk prototype servo reverser ACE R/C few mods could fit space available would left servo having two pigtails rotation Plug need configuration left project returned servo Bob must careful let unused plug short out metal parts because will short out batteries kill whole system As said before like idea having servo reverser receiver todays IC circuitry major configuration change would adding second set sockets other rotation Its fair mention Kraft has shipping sets 10 years have two servos set up direction Editors NoteLike feature Cox-Sanwa get what want swapping around dot no dot servos dot tiny circle molded mounting flange between cutouts grommets Once get flight pack set up right theres no way make mistake Thats way like things Over years have bought flight packs transmitters work plane until control trims throws right transmitter trim levers center position leave everything alone until needs service way can pick plane off wall go flying worrying its compatible 98 Model Aviation transmitter crystals match will work way becomes familiar comfortable transmitter feel very short time flying becomes auto matic Oh want know about 7 Revers ing Control Surface can cross aileron pushrods put rudder control horn opposite side Great ideas think building same goes elevator could put control horn top belongs pulling out dive puts highest load elevator pushrod rod would tension rather compression couldnt buckle worst possible moment Keep letters coming friends Ive fortunate enough receive some very nice ones recently worth mentioning came Ron Smith AMA 83995 & WA4JNX Ron sent Official Mem bership Certificate Honorary Tarrant Amateur Repeater Assoc contingent obtaining Technicians License spoke earlier column will have tell obtaining Tech License soon think will like what see hear Keep watching George Myers 70 Froehlich Farm Rd Hicksville NY 11801 mgs epoxied place panel Make wing strut 031 galvanized steel fittings attach wing yet spar root ends cut shown Save-A-Plane Downed aircraft locateralso functions range checker receiver-on indicatorwill sound horn can heard long distances hours low-battery drain Small size weight permits installa tion almost plane Works positive negative pulse 3-or 4-wire system Battery drain less 100 microamps 20 MA at5V 40 MA 9V horn Size 103 dia 1095 depth weight 25 grams less 1 oz Sound output 80dB 3 ft $1995 Save-A-Plane Box 344 Cos Cob CT 06807 product review product review product review Holes rubber hooks drilled blind nuts epoxied Wing Strut Rigging struts need no explanation Once made con nect wings fuselage rubber bands between hooks Lay fuselage wings upside down flat surface Make cardboard template check 1 ee scale dihedral between fuselage sides wing spars bottom Block up whole ship underneath dihedral correct about 2 degrees washout wing tips Attach bottom strut hooks fuselage strut fittings locate wing strut fittings spars Attach bolts shown Covering The sanding high points very careful checking points contact between framework covering can make difference between first last place contest added time required well worth Fairchild covered flat aircraft aluminum MonoKote covering makes very realistic finish model very much harder use regular Mono Kote fact Sid Axekod Top-Flite said stopped making dull surface covering fact having paint has much appeal Anyone dedicated making scale model wont object silk dope etc Flying I first flew FC-2 very early April 1979 99 THE KIT IS NOW AVAILABLE 2hE L 34G15 Ace Digipace assembled $9495 34G16Ace Digipace kit Please send complete catalog Enclosed SI 00 refunded myNAAIE first order Add 150 1st clan nuilADDRESS return add S1U handling other nrderscify NOW WHAT EVERYONES BEEN WAITING FOR sophisticated piece . pment cycling ni-cd batteries Accurate dependable attractive --Automatic discharging recharging both re ceiver transmitter batteries simultaneously independently Switch three different transmitter voltages 6V 96V 12V --Switch two different receiver charge rates 20 ma 50 ma --Four digit LED readout no mechanical clock motors --Modern design tight tolerance components sure total accuracy down 10/0 1/10 minute --Available kit form assembled tested BOX 511E HIGGINSVILLE MO 7995 STATE Fairchild/Clapp continued page 27 product review product review product review writing advertisers mention read about Model Aviation
Edition: Model Aviation - 1979/04
Page Numbers: 18, 19, 98, 99
I SPENT pleasant lunch-hour discussing servo-reversing techniques Bob Ab erie Bob reviews radios Flying Models magazine probably knows what being offered various manufacturers better salesman also owns latest equipment including Kraft Signature system bought last year partly because kept urging him spend money As result other discussions came agreement someone has missed point servoreversing methods sent market want plane adjusted fit transmitter vice-versa Before showing what decided would reasonable consider deed can done Servo-reversing term will use describe method can used change direction motion control surface eg elevator respect given motion control stick transmitter Servo-reversing can intro duced several points link hand control surface wit 1 control stick 2 Inside transmitter electronic package 3 Inside receiver electronic package 4 Between receiver servo 5 Inside servo electronic package 6 servo/pushrod interface 7 control surface Last month showed Hank Prew performed servo-reversing MRC772 removing stick assembly re-installing rotated 1800 its original position sets can reversed manner primary disadvantage method location trim lever changes Personally find variety trim-lever locations biggest nuisances face teaching others fly RC have reach looking need such first test flight someone elses plane cant find So method cheap quick easy has better way 1 It might possible cut leads stick potentiometer install nonpolarized 3-pin plug can simply reverse plug reverse action will have re-zero system some way servo can re-zeroed pushing screw-driver hex-wrench down hole left removing screw attaches output wheel might good way thing will spread wear servo-potentiometer track disad vantage have open up both transmitter airplane make changes Another way would add electrical trim inside transmitter case 2 Im going skip over possible electronic revisions transmitter receiver moment because dont have simple circuits readers can incorporate existing sets However need refer Kraft ads see Signature incorporates servoreversing front-panel switch Fig 1 panel also includes servo-span ad justment dual-rate feature Bob tells saves least days building time time uses Signature because installs servos fit best runs pushrods out way after everything buttoned down plane sitting its wheels sets up servo directions spans sitting comfortably easy chair transmitter lap Boy 18 Model Aviation FIg 1 Control panel Bobs Kraft Signature shows extra control adjustments have make because can make Ideal type transmitter someone has move design another times year Bob does Once get comfortable box can fly anything wIth 01 George has hIs crates wall trimmed just grab Fig2 ACE RIC Bantam Midget machinery Bantam case some servo reversing options considered text topto bottom servo DIP switch Noble switch prototype servo reverser Text covers variety ways achieve servo reversing some guys rub dont snake Eden also least three friends have managed put some dents aircraft using Signature systems knob provided permits make adjustment darned well better make So still see people trying fly reversed ailerons dont Bob 3 Next attract attention receiver small increase price would possible include servo-reversing part decoder Now opinion real opportunity lies Assuming have 3-wire servos two options First would change servo plugs 5-wire unpolarized types 5-wire receptacle could easily wired receiver plugging servo way would give clockwise rotation output wheel inverting plug socket would give counter-clockwise rotation disadvant age scheme price fact will have remove wing get plugs forget reverse servo advantage once get airplane right stays way poten tial aileron reversal can eliminated using polarized 3-pin connector aileron extension cable dont like 5-pin solution also possible have separate 3-pin sockets clockwise counter-clockwise rotation piece tape over unused sockets eliminates aileron reversal problem servos need changed 4 Several manufacturers make in-line servo reversers need open connection between receiver servo insert items accomplish servo-reversing advantage approach dont have change anything disadvantage have extra bulk dollars weight deal 5 & 6 Finally come servo itself obvious thing faced Continued page 98 April1979 19 RC filers need practice safe reliable operation need Important comes toAirShowteamsthe Image portray affects us Photo lastysars Nats shows mnbers Florida Air Show Team Col Art Johnson controls checking Flying kt-k 4or properly closedused tow banners opening end show Flying ira Taurus IIlana ruaaersuDoorsal Tin sweptoacwings wiin vorKexrIIps upur Poxy fuselage Power Supertlgre 80 floatsso perhaps too demanding A-i Congratuiating other after successfui flight giant model C-130 Lockheed Hercules Cpl Tax Bryson L pilot Sgt Dennis Scott both Royal Australian Air Force presently operates 24 130s Hercules has wingspan 138 118 long weighs 264 lbs first flight made Edinburgh Airfield near Adelaide saw perfect takeoff six big circuits touch down just iike real thing Insured $5000 perfect reproduction Hercules lighting seating capable making 48 model-man parachute drop Openers/Winter continued page 72 have something tell As RCer FOs chief interest CL Racing frantic aerobatics pilots center circle will find Bill Lee CL Racing talking about home-made fibreglass props Bill Wynn Paul too guy endlessly seeks truth about tanks things like props doing experimenting finding para meters Dave Chesney writes beautifully RC Helicopters column existence now Bill Warner Sport/Scale will put humor life flying circus note others gang Without guys like us would never know about hundreds things add up sum total skills Brad Powers lead article floats quarter-scale landmark article Model aviation old century yet explosion knowledge techniques products never dared dream about what know about floats would fit smallest drawer field box So designer partook dozens famous pro jects made history modeler boot telling us design float virtually size modelas well monsters weve yet see water Note feed-inIrwin Ohlsson great Ernie Stout Convair fame What suggesting dear friend April issue however excep tional 12 year talking about magazine Within another yearGod willingit will thousand light years beyond April 1976 MA began July 1975 its modern form ask conscious magazine contro versial terms some other magazines have shown theyd like see deadbut inspect closely what speak especially minority members did subscribe MA past yours wed like proud AS WE GO TO PRESS sad news ar rives passing Myron Mike Schlesinger recent past president Top Flite Models Mike respected friend industry innumerable modelers true pioneer helped start Top Flite its way chaired trade show committee 1956 became member HIAAs board directors served nearly 10 years chairman co-chairman HIAAs Model Aeronautics Division Hu morous easy going always compassion ate understanding Mike Schlesinger will truly missed us Floats Powers continued page 17 actual floats installed Citabria model together summary results some photos Irwin Ohlsson thirties deve loped line famous Ohlsson engines now retired builds beautiful model seaplanes has given pair floats developed has found very satisfactory straightforward design have generous step landing angle embody progressive deadrise Rather present float complete its displacement Center Buoyancy etc ready determined will give its dimensions trim another guesstimate draft 16 40 percent its beam data procedures already discussed up find answers problems Fig 6 shows float answers will found illustration Answers Float Prob lems Finally wish express thanks Ernest G Stout former Chief Hydrody namics Convair worked interesting projects sistance providing data presented herein Now am going start building float build finish before write let know works can de cide whether stay leave Tierra Del Fuego RC Technique/Myers continued page 19 control thats going wrong way move pushrod hole opposite side output wheel frequently make such change field someone needs disadvantage approach pushrods usually get tangled you end up product review product review product review Radial Engines man has thingultra deluxe 57-cylinder scale-like engines /4 scale 4-cycle high-torque swing 16-8 through 20-6 props Low vibra tion low fuel consumption mild glow fuel 6-in diameter 23 oz weight 7cylinder engines offered 3 versionspol ished aluminum anodized black deluxe Collectors Gold Edition package trimmed 14K gold Manufacturer states fully opera tional warranted 90 dayssold direct Executive Engines Co 16650 S 104th Ave Orland Park IL 60462 product review product review product review swapping rudder elevator servos side-by-side using Nyrod often finds surgery neces sary because outer shell has anchored location doesnt allow shift connection other side wheel Wouldnt nice could just throw reversing switch servo point Bobs eyes lit up Ill bet Ace R/C Bantam Midget machinery will fit regular Bantam case says leave enough room servo reverser dont see what can idea George kicked around some possibilities until time get back work few days later Bantam case Bantam Midget servo appeared desk magic Christmas came bit early year thought until Bob told wanted back after youve finished rever sing switch first thought make use 16pin DIP switch After little consideration possibilities left open direct short across batteries dropped idea Besides switch too big Next tried 4PDT Noble switch commonly used switch harnesses RC systems can made fit little help Dremel problem will have take out servo get switch smaller switch could mounted right out open can get couldnt find Slightly later Bob left another goodie desk prototype servo reverser ACE R/C few mods could fit space available would left servo having two pigtails rotation Plug need configuration left project returned servo Bob must careful let unused plug short out metal parts because will short out batteries kill whole system As said before like idea having servo reverser receiver todays IC circuitry major configuration change would adding second set sockets other rotation Its fair mention Kraft has shipping sets 10 years have two servos set up direction Editors NoteLike feature Cox-Sanwa get what want swapping around dot no dot servos dot tiny circle molded mounting flange between cutouts grommets Once get flight pack set up right theres no way make mistake Thats way like things Over years have bought flight packs transmitters work plane until control trims throws right transmitter trim levers center position leave everything alone until needs service way can pick plane off wall go flying worrying its compatible 98 Model Aviation transmitter crystals match will work way becomes familiar comfortable transmitter feel very short time flying becomes auto matic Oh want know about 7 Revers ing Control Surface can cross aileron pushrods put rudder control horn opposite side Great ideas think building same goes elevator could put control horn top belongs pulling out dive puts highest load elevator pushrod rod would tension rather compression couldnt buckle worst possible moment Keep letters coming friends Ive fortunate enough receive some very nice ones recently worth mentioning came Ron Smith AMA 83995 & WA4JNX Ron sent Official Mem bership Certificate Honorary Tarrant Amateur Repeater Assoc contingent obtaining Technicians License spoke earlier column will have tell obtaining Tech License soon think will like what see hear Keep watching George Myers 70 Froehlich Farm Rd Hicksville NY 11801 mgs epoxied place panel Make wing strut 031 galvanized steel fittings attach wing yet spar root ends cut shown Save-A-Plane Downed aircraft locateralso functions range checker receiver-on indicatorwill sound horn can heard long distances hours low-battery drain Small size weight permits installa tion almost plane Works positive negative pulse 3-or 4-wire system Battery drain less 100 microamps 20 MA at5V 40 MA 9V horn Size 103 dia 1095 depth weight 25 grams less 1 oz Sound output 80dB 3 ft $1995 Save-A-Plane Box 344 Cos Cob CT 06807 product review product review product review Holes rubber hooks drilled blind nuts epoxied Wing Strut Rigging struts need no explanation Once made con nect wings fuselage rubber bands between hooks Lay fuselage wings upside down flat surface Make cardboard template check 1 ee scale dihedral between fuselage sides wing spars bottom Block up whole ship underneath dihedral correct about 2 degrees washout wing tips Attach bottom strut hooks fuselage strut fittings locate wing strut fittings spars Attach bolts shown Covering The sanding high points very careful checking points contact between framework covering can make difference between first last place contest added time required well worth Fairchild covered flat aircraft aluminum MonoKote covering makes very realistic finish model very much harder use regular Mono Kote fact Sid Axekod Top-Flite said stopped making dull surface covering fact having paint has much appeal Anyone dedicated making scale model wont object silk dope etc Flying I first flew FC-2 very early April 1979 99 THE KIT IS NOW AVAILABLE 2hE L 34G15 Ace Digipace assembled $9495 34G16Ace Digipace kit Please send complete catalog Enclosed SI 00 refunded myNAAIE first order Add 150 1st clan nuilADDRESS return add S1U handling other nrderscify NOW WHAT EVERYONES BEEN WAITING FOR sophisticated piece . pment cycling ni-cd batteries Accurate dependable attractive --Automatic discharging recharging both re ceiver transmitter batteries simultaneously independently Switch three different transmitter voltages 6V 96V 12V --Switch two different receiver charge rates 20 ma 50 ma --Four digit LED readout no mechanical clock motors --Modern design tight tolerance components sure total accuracy down 10/0 1/10 minute --Available kit form assembled tested BOX 511E HIGGINSVILLE MO 7995 STATE Fairchild/Clapp continued page 27 product review product review product review writing advertisers mention read about Model Aviation