Radio Control Helicopters. Dave Chesney MARCH may best time attempting first RC helicopter flights maybe youll have few days less gale force winds gusty winds cause frustrations beginning helicopter pilot slight breeze steady velocity usually helps cautious selection flying condi tions before attempt fly conditions few checks machine addition covered last month hints covered last month dealt static set-up typical RC helicopter month well start engine con tinue setting up machine its dynamic condition important checks accomplished before allowing helicop ter its freedom radio radio check heartily recommend machine restrained some man ner problem radio noise will damage machine importantly machine will less likely damage helper Some helicopter instructions recom mend helicopter restrained dur ing certain dynamic checks holding tail Ive used technique myself gosh sake make sure radio works before think about trying technique Dont grab tiger tail best method restraint opinion firmly attach helicopter ground passing board through skids fabricating test board shown sketch Once radio reliabil ity confirmed power settings machine can allowed its freedom ex-prop twisters Ill remind you must always start engine throttle set low trim advanced Have assistant hold rotor head firmly carefully avoiding linkages pushrods Connect glow plug lead engage starter Once engine has started adjust throttle trim lowest possible idle setting low idle clutch may engaging slightly have assistant maintain grip rotor head until youre ready Make sure releases grip smartly steps clear avoid M/R blades Now since machine firmly re strained ground may advance throttle full dont keep long machine will probably vibrate BOARD THRU SKIDS TO CLEAR ROTOR DISC MAY BE WEIGHTED AT ENDS WINGNUT TOGGLE METAL STOCK ____i 7 WIDTH OF SKIDS -- A / ---- V HEAVY PLYWOOD PANEL WITH RESTRAINING TOGGLES LOCKED IN PLACE WITH WINGNUTS Top Board through skids clear rotor disc may weighted ends Above Heavy plywood panel restraining toggles locked place wing nuts Throttle Stick Position Collective Mixing Lift OffRPMsTorqueBlade Tracking ting 1/2 HighLowLow blade upIncrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 HighLowLow blade upIncrease collective throttle mix severely full rpm its restrained condi tion looking radio reliability throughout rpm range chance adjust needle valve engine needle valve should ad justed engine running slightly rich side adjusting needle valve recommend engine brought idle blades stopped small changes needle made until optimum setting achieved Now blade tracking will re call last months set-ups included static setting M/R blade coning angle blade pitch lead lag though set-ups accurate 28 Model Aviation QUICK REFERENCE BLADE TRACKING AND RPM GUIDE SymptomAction relationship revs pitch important Most instructions recommend lift off 1/2 stick possible two extremes Which desirable See text instructions determine optimum settings can expect blades lifting will some further adjustments neces sary Most instructions have noted order facilitate balancing trim Mono Kote similar material used order finely balance blades trim will also aid identifying blade other rotor system turn ing up quick note color choice may help see tip trim bit easier recommend black white though contrast better choice would color both contrasts somewhat reflective such orange green red white blade yellow black blade have found green orange white have worked pretty good under lighting conditions important point can identify two turning blades whatever choice color Now helicopter still restrained advance throttle until pro nounced lifting motion machine usually about -throttle look rotor disc spinning will probably see blade appears running higher other Make mental note blade high approximate throttle setting retard throttle shut engine down stop blades blades must now adjusted turning lift-off rpm appears superirfiposed other lift-off machine slightly above half-throttle position order accomplish proper adjust ment high blade must given de creased pitch depending approx imate throttle setting lift-off method adjustment probably covered instructions throttle stick position high greater full trim -throttle main rotor rpm high adjust low rotor blade up throttle position high rotor rpm low bring high blade down Conversely throttle stick position low less full trim half stick main rotor rpm low adjust high blade down throttle position low rpm high bring low blade up Again adjusting main rotor system two conditions blade tracking two proper rpm lift off Its really easier sounds Per haps chart following note will make sense Remember pitch main rotors may adjusted throttle will yield low rpm high torque high rpm low torque what want machine fly highest possible rpm lowest torque might add engine pilot will happiest revs high torque low Check instruction man uals clarifications recommended tachometer readings M/R tail STOCKMODIFIED 1WEDGESHAPEDSHIM\1 TO SUIT LJPJ3 REDUCED ANGLE I. / BLADE TRACKING BEND COLLECTIVE WIRE SO THAT ITCAN ENGAGE WITH INSIDE HOLE OF BELLCRANK tail too sensitive already using inside hole servo arm dont have dual rate transmitter try mode must no friction freedom movement T/R collective rod BLADE TRACKING NOTE ALL ANGLES EXAGGERATED FOR CLARITY COLORED TIP jSTATIC CONING ANGLE BOTI-IBLADESEQUAL I STATIC CONDITION RIGHT COLORED TIP~ BLADE DYNAMIC OW f LEVELS -~STATICCONING 2 DYNAMIC OUTOF TRACK0 REFERENCE LEVEL CONDITION WRONG COLORED TIP DYNAMIC LEVEL- BOTH % ADES IN TRACK - - --- STATIC CONING ~OREFERENCE LEVEL 3 DYNAMIC IN TRACK CONDITION though static coning angle 1 pitch set correctly minor differences blade airfoil flexibility may cause dynamic error 21 blade higher other Ad justment pitch both blades may necessary blades track same level proper lift-off achieved rotor Although have recommended machine restrained checking blade tracking should point out precise tracking may accom plished observing machine free flight course order first have know fly An outof-track rotor system complicates fly ing slightly Tall rotor adjustment tail rotor adjustment helicopter will need its freedom remove restraints select smooth level surface fire up engine have everyone stand back face ma chine wind slowly advance throttle used eyeball method static adjustment noted last month youll probably find machine gets light nose will begin yaw right indicates too much tail rotor pitch Try correct yawing tendency transmitter trim finally tail rotor stick Continue advance throttle concentrate nose machine machine breaks ground slow yaw left right main stick neutral static adjustments probably pretty close Land machine make appro priate adjustments T/R pitch control light condition just prior lift off machine seems overly sensitive tail rotor control may wish re Continued page 100 March 1979 29 WHY Just fun stick FIRE BALL great engine runs *advanced ...... .. H STARTING 0 UNEXCELLED POWEP LOWEST DRAIN LONGER LIFE GLOW PLUGS SWANSON ASSOCIATES P0 BOX 151WAYNE NEW JEBSEY 07470 JINTERNATIONAL INC REPLA-TEC H MC KENZIE 1-IWY PLAN SI VIOA OREGON 974B8 GEE BEE Z DECALS ALL NUMBERS 21 SCALE & LETTERING 4 * EXCEPTi4h-t1tl THOSE OF THE WINGS GRANGE R WILLIAMS$495 PAWNER STREET SAN MARCOS CALIFORNIA 92069 gear greater extent light trainer possible gear prototype should copied making certain loads spread surrounding structure Avoid load concentrations single points 1978 Contests No single competition event has caught like Sport Scale Last year ten times sanc tioned AMA contests Sport Scale Precision Scale other scale events combined eastern US scale events midwest least breakdown follows no rallys included Radio Control total 184 Sport 165 Precision 16 Mammoth 3 Control Line total 31 Sport 20 Preci sion 11 Free Flight Outdoor total 51/ Gas 9 Rubber 15 Peanut 27Indoor total 18 Indoor 10 Peanut 8 high level participation RC Sport Scale generates much comment complaints Bob Temple Boca Raton Florida writes suggestions what would like see Stand-Off Scale 1 50-ft circle 10 feet way too small especially 8- 9-ft wing spans 2 Novice Expert same Pattern Gives newcomers better chance Once has won first place moves Expert 3 Time limit static judging less conversing between judges allowed flight should allowed static Actually nine-foot span compared six feet has wing tip 18 inches closer judges eyes change present 20-foot circle 25 feet would compensate maintain original intent rule desire greater viewing distance reaction trend Sport Scale toward general up-grading planes has happened throughout history competition modeling process improvement repeats events imposition rule changes has failed bring halt up-grading Finding good judges remains problem getting tough wont ease situation Judges regarded adversaries have no event Bob Dolly Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Helicopters/Chesney continued page 29 duce tail sensitivity using rate control transmitter moving tail rotor control rod toward center servo arm methods shown sketches Tail rotor sensitivity should adjusted response input positive fast cause tendency over-control Since proper control tail important successfully flying ma chine wise devote special attention T/R response set-up may elect purchase Kavan gyro make life little easier keep mind T/R control should never neglected learning fly RC helicopter T/R gyro assisted opinion difficulty main taining yaw heading helicopter due largely bad habits developed flying fixed-wing aircraft feel majority fixed-wing sport fliers de velop habit neglecting left stick Mode II throttle rudder controls fact dare say touch throttle rudder average flight therefore feel less com fortable absolute necessity controls flying helicopter sport fliers 3-channel aircraft set up rudder control ail eron stick again neglects need left stick activity point helicopters difficult fly poor habits such noted above will complicate learning process recommend fixed-wing ac tivities minimized learn helicopter controls must fly airplanes least concentrate using flight controls during fixedwing flying activitiesget comfortable left stick Next month some tips hope theyre helping let hear Dont forget meeting Toledo Show April 6 7 8 helicopter enthu siasts will meet Saturday night time place announced show Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Soaring/Pruss continued page 3 1 aluminum molds allowed cure finish flawless trailing edges al sharp enough used shaving barn door type ailerons span about one-half wing have see fit believe hinge line con cave/convex joint could slip sheet notebook paper between wing aileron hinge joint hinges themselves Robarts three pe aileron ailerons driven through torque tube 5-mm wire main wing support much smaller diameter wire keeps wings aligned During same meeting between ses sions watched 1200 feet F3B compe tition held Europe guys build well fly better Although have ships seemingly traded off duration speed won contest Europe speeds phenomenal 11 seconds seems barrier US fliers Austrians turning nines Speed 25% F3B contest strategy particular task emphasis varies different fliers Frankly feel birds too speed-oriented argue success As availability models dont rush local hobby shop As Fritz put efforts secret feel club should develop own designs offering data building techniques book will available sometime late spring However club flush Fritz will travel youre willing host him pay expenses hell tell show Are still raised eyebrows out Dan Pruss Rt 2 Box 490 Plainfield IL 60544 writing advertisers mention read about Model Aviation 100 Model Aviation #H30 HOT 3 volts foster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition
Edition: Model Aviation - 1979/03
Page Numbers: 28, 29, 100
Radio Control Helicopters. Dave Chesney MARCH may best time attempting first RC helicopter flights maybe youll have few days less gale force winds gusty winds cause frustrations beginning helicopter pilot slight breeze steady velocity usually helps cautious selection flying condi tions before attempt fly conditions few checks machine addition covered last month hints covered last month dealt static set-up typical RC helicopter month well start engine con tinue setting up machine its dynamic condition important checks accomplished before allowing helicop ter its freedom radio radio check heartily recommend machine restrained some man ner problem radio noise will damage machine importantly machine will less likely damage helper Some helicopter instructions recom mend helicopter restrained dur ing certain dynamic checks holding tail Ive used technique myself gosh sake make sure radio works before think about trying technique Dont grab tiger tail best method restraint opinion firmly attach helicopter ground passing board through skids fabricating test board shown sketch Once radio reliabil ity confirmed power settings machine can allowed its freedom ex-prop twisters Ill remind you must always start engine throttle set low trim advanced Have assistant hold rotor head firmly carefully avoiding linkages pushrods Connect glow plug lead engage starter Once engine has started adjust throttle trim lowest possible idle setting low idle clutch may engaging slightly have assistant maintain grip rotor head until youre ready Make sure releases grip smartly steps clear avoid M/R blades Now since machine firmly re strained ground may advance throttle full dont keep long machine will probably vibrate BOARD THRU SKIDS TO CLEAR ROTOR DISC MAY BE WEIGHTED AT ENDS WINGNUT TOGGLE METAL STOCK ____i 7 WIDTH OF SKIDS -- A / ---- V HEAVY PLYWOOD PANEL WITH RESTRAINING TOGGLES LOCKED IN PLACE WITH WINGNUTS Top Board through skids clear rotor disc may weighted ends Above Heavy plywood panel restraining toggles locked place wing nuts Throttle Stick Position Collective Mixing Lift OffRPMsTorqueBlade Tracking ting 1/2 HighLowLow blade upIncrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 HighLowLow blade upIncrease collective throttle mix severely full rpm its restrained condi tion looking radio reliability throughout rpm range chance adjust needle valve engine needle valve should ad justed engine running slightly rich side adjusting needle valve recommend engine brought idle blades stopped small changes needle made until optimum setting achieved Now blade tracking will re call last months set-ups included static setting M/R blade coning angle blade pitch lead lag though set-ups accurate 28 Model Aviation QUICK REFERENCE BLADE TRACKING AND RPM GUIDE SymptomAction relationship revs pitch important Most instructions recommend lift off 1/2 stick possible two extremes Which desirable See text instructions determine optimum settings can expect blades lifting will some further adjustments neces sary Most instructions have noted order facilitate balancing trim Mono Kote similar material used order finely balance blades trim will also aid identifying blade other rotor system turn ing up quick note color choice may help see tip trim bit easier recommend black white though contrast better choice would color both contrasts somewhat reflective such orange green red white blade yellow black blade have found green orange white have worked pretty good under lighting conditions important point can identify two turning blades whatever choice color Now helicopter still restrained advance throttle until pro nounced lifting motion machine usually about -throttle look rotor disc spinning will probably see blade appears running higher other Make mental note blade high approximate throttle setting retard throttle shut engine down stop blades blades must now adjusted turning lift-off rpm appears superirfiposed other lift-off machine slightly above half-throttle position order accomplish proper adjust ment high blade must given de creased pitch depending approx imate throttle setting lift-off method adjustment probably covered instructions throttle stick position high greater full trim -throttle main rotor rpm high adjust low rotor blade up throttle position high rotor rpm low bring high blade down Conversely throttle stick position low less full trim half stick main rotor rpm low adjust high blade down throttle position low rpm high bring low blade up Again adjusting main rotor system two conditions blade tracking two proper rpm lift off Its really easier sounds Per haps chart following note will make sense Remember pitch main rotors may adjusted throttle will yield low rpm high torque high rpm low torque what want machine fly highest possible rpm lowest torque might add engine pilot will happiest revs high torque low Check instruction man uals clarifications recommended tachometer readings M/R tail STOCKMODIFIED 1WEDGESHAPEDSHIM\1 TO SUIT LJPJ3 REDUCED ANGLE I. / BLADE TRACKING BEND COLLECTIVE WIRE SO THAT ITCAN ENGAGE WITH INSIDE HOLE OF BELLCRANK tail too sensitive already using inside hole servo arm dont have dual rate transmitter try mode must no friction freedom movement T/R collective rod BLADE TRACKING NOTE ALL ANGLES EXAGGERATED FOR CLARITY COLORED TIP jSTATIC CONING ANGLE BOTI-IBLADESEQUAL I STATIC CONDITION RIGHT COLORED TIP~ BLADE DYNAMIC OW f LEVELS -~STATICCONING 2 DYNAMIC OUTOF TRACK0 REFERENCE LEVEL CONDITION WRONG COLORED TIP DYNAMIC LEVEL- BOTH % ADES IN TRACK - - --- STATIC CONING ~OREFERENCE LEVEL 3 DYNAMIC IN TRACK CONDITION though static coning angle 1 pitch set correctly minor differences blade airfoil flexibility may cause dynamic error 21 blade higher other Ad justment pitch both blades may necessary blades track same level proper lift-off achieved rotor Although have recommended machine restrained checking blade tracking should point out precise tracking may accom plished observing machine free flight course order first have know fly An outof-track rotor system complicates fly ing slightly Tall rotor adjustment tail rotor adjustment helicopter will need its freedom remove restraints select smooth level surface fire up engine have everyone stand back face ma chine wind slowly advance throttle used eyeball method static adjustment noted last month youll probably find machine gets light nose will begin yaw right indicates too much tail rotor pitch Try correct yawing tendency transmitter trim finally tail rotor stick Continue advance throttle concentrate nose machine machine breaks ground slow yaw left right main stick neutral static adjustments probably pretty close Land machine make appro priate adjustments T/R pitch control light condition just prior lift off machine seems overly sensitive tail rotor control may wish re Continued page 100 March 1979 29 WHY Just fun stick FIRE BALL great engine runs *advanced ...... .. H STARTING 0 UNEXCELLED POWEP LOWEST DRAIN LONGER LIFE GLOW PLUGS SWANSON ASSOCIATES P0 BOX 151WAYNE NEW JEBSEY 07470 JINTERNATIONAL INC REPLA-TEC H MC KENZIE 1-IWY PLAN SI VIOA OREGON 974B8 GEE BEE Z DECALS ALL NUMBERS 21 SCALE & LETTERING 4 * EXCEPTi4h-t1tl THOSE OF THE WINGS GRANGE R WILLIAMS$495 PAWNER STREET SAN MARCOS CALIFORNIA 92069 gear greater extent light trainer possible gear prototype should copied making certain loads spread surrounding structure Avoid load concentrations single points 1978 Contests No single competition event has caught like Sport Scale Last year ten times sanc tioned AMA contests Sport Scale Precision Scale other scale events combined eastern US scale events midwest least breakdown follows no rallys included Radio Control total 184 Sport 165 Precision 16 Mammoth 3 Control Line total 31 Sport 20 Preci sion 11 Free Flight Outdoor total 51/ Gas 9 Rubber 15 Peanut 27Indoor total 18 Indoor 10 Peanut 8 high level participation RC Sport Scale generates much comment complaints Bob Temple Boca Raton Florida writes suggestions what would like see Stand-Off Scale 1 50-ft circle 10 feet way too small especially 8- 9-ft wing spans 2 Novice Expert same Pattern Gives newcomers better chance Once has won first place moves Expert 3 Time limit static judging less conversing between judges allowed flight should allowed static Actually nine-foot span compared six feet has wing tip 18 inches closer judges eyes change present 20-foot circle 25 feet would compensate maintain original intent rule desire greater viewing distance reaction trend Sport Scale toward general up-grading planes has happened throughout history competition modeling process improvement repeats events imposition rule changes has failed bring halt up-grading Finding good judges remains problem getting tough wont ease situation Judges regarded adversaries have no event Bob Dolly Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Helicopters/Chesney continued page 29 duce tail sensitivity using rate control transmitter moving tail rotor control rod toward center servo arm methods shown sketches Tail rotor sensitivity should adjusted response input positive fast cause tendency over-control Since proper control tail important successfully flying ma chine wise devote special attention T/R response set-up may elect purchase Kavan gyro make life little easier keep mind T/R control should never neglected learning fly RC helicopter T/R gyro assisted opinion difficulty main taining yaw heading helicopter due largely bad habits developed flying fixed-wing aircraft feel majority fixed-wing sport fliers de velop habit neglecting left stick Mode II throttle rudder controls fact dare say touch throttle rudder average flight therefore feel less com fortable absolute necessity controls flying helicopter sport fliers 3-channel aircraft set up rudder control ail eron stick again neglects need left stick activity point helicopters difficult fly poor habits such noted above will complicate learning process recommend fixed-wing ac tivities minimized learn helicopter controls must fly airplanes least concentrate using flight controls during fixedwing flying activitiesget comfortable left stick Next month some tips hope theyre helping let hear Dont forget meeting Toledo Show April 6 7 8 helicopter enthu siasts will meet Saturday night time place announced show Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Soaring/Pruss continued page 3 1 aluminum molds allowed cure finish flawless trailing edges al sharp enough used shaving barn door type ailerons span about one-half wing have see fit believe hinge line con cave/convex joint could slip sheet notebook paper between wing aileron hinge joint hinges themselves Robarts three pe aileron ailerons driven through torque tube 5-mm wire main wing support much smaller diameter wire keeps wings aligned During same meeting between ses sions watched 1200 feet F3B compe tition held Europe guys build well fly better Although have ships seemingly traded off duration speed won contest Europe speeds phenomenal 11 seconds seems barrier US fliers Austrians turning nines Speed 25% F3B contest strategy particular task emphasis varies different fliers Frankly feel birds too speed-oriented argue success As availability models dont rush local hobby shop As Fritz put efforts secret feel club should develop own designs offering data building techniques book will available sometime late spring However club flush Fritz will travel youre willing host him pay expenses hell tell show Are still raised eyebrows out Dan Pruss Rt 2 Box 490 Plainfield IL 60544 writing advertisers mention read about Model Aviation 100 Model Aviation #H30 HOT 3 volts foster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition
Edition: Model Aviation - 1979/03
Page Numbers: 28, 29, 100
Radio Control Helicopters. Dave Chesney MARCH may best time attempting first RC helicopter flights maybe youll have few days less gale force winds gusty winds cause frustrations beginning helicopter pilot slight breeze steady velocity usually helps cautious selection flying condi tions before attempt fly conditions few checks machine addition covered last month hints covered last month dealt static set-up typical RC helicopter month well start engine con tinue setting up machine its dynamic condition important checks accomplished before allowing helicop ter its freedom radio radio check heartily recommend machine restrained some man ner problem radio noise will damage machine importantly machine will less likely damage helper Some helicopter instructions recom mend helicopter restrained dur ing certain dynamic checks holding tail Ive used technique myself gosh sake make sure radio works before think about trying technique Dont grab tiger tail best method restraint opinion firmly attach helicopter ground passing board through skids fabricating test board shown sketch Once radio reliabil ity confirmed power settings machine can allowed its freedom ex-prop twisters Ill remind you must always start engine throttle set low trim advanced Have assistant hold rotor head firmly carefully avoiding linkages pushrods Connect glow plug lead engage starter Once engine has started adjust throttle trim lowest possible idle setting low idle clutch may engaging slightly have assistant maintain grip rotor head until youre ready Make sure releases grip smartly steps clear avoid M/R blades Now since machine firmly re strained ground may advance throttle full dont keep long machine will probably vibrate BOARD THRU SKIDS TO CLEAR ROTOR DISC MAY BE WEIGHTED AT ENDS WINGNUT TOGGLE METAL STOCK ____i 7 WIDTH OF SKIDS -- A / ---- V HEAVY PLYWOOD PANEL WITH RESTRAINING TOGGLES LOCKED IN PLACE WITH WINGNUTS Top Board through skids clear rotor disc may weighted ends Above Heavy plywood panel restraining toggles locked place wing nuts Throttle Stick Position Collective Mixing Lift OffRPMsTorqueBlade Tracking ting 1/2 HighLowLow blade upIncrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 LowHighHigh blade downDecrease collective throttle mix 1/2 HighLowLow blade upIncrease collective throttle mix severely full rpm its restrained condi tion looking radio reliability throughout rpm range chance adjust needle valve engine needle valve should ad justed engine running slightly rich side adjusting needle valve recommend engine brought idle blades stopped small changes needle made until optimum setting achieved Now blade tracking will re call last months set-ups included static setting M/R blade coning angle blade pitch lead lag though set-ups accurate 28 Model Aviation QUICK REFERENCE BLADE TRACKING AND RPM GUIDE SymptomAction relationship revs pitch important Most instructions recommend lift off 1/2 stick possible two extremes Which desirable See text instructions determine optimum settings can expect blades lifting will some further adjustments neces sary Most instructions have noted order facilitate balancing trim Mono Kote similar material used order finely balance blades trim will also aid identifying blade other rotor system turn ing up quick note color choice may help see tip trim bit easier recommend black white though contrast better choice would color both contrasts somewhat reflective such orange green red white blade yellow black blade have found green orange white have worked pretty good under lighting conditions important point can identify two turning blades whatever choice color Now helicopter still restrained advance throttle until pro nounced lifting motion machine usually about -throttle look rotor disc spinning will probably see blade appears running higher other Make mental note blade high approximate throttle setting retard throttle shut engine down stop blades blades must now adjusted turning lift-off rpm appears superirfiposed other lift-off machine slightly above half-throttle position order accomplish proper adjust ment high blade must given de creased pitch depending approx imate throttle setting lift-off method adjustment probably covered instructions throttle stick position high greater full trim -throttle main rotor rpm high adjust low rotor blade up throttle position high rotor rpm low bring high blade down Conversely throttle stick position low less full trim half stick main rotor rpm low adjust high blade down throttle position low rpm high bring low blade up Again adjusting main rotor system two conditions blade tracking two proper rpm lift off Its really easier sounds Per haps chart following note will make sense Remember pitch main rotors may adjusted throttle will yield low rpm high torque high rpm low torque what want machine fly highest possible rpm lowest torque might add engine pilot will happiest revs high torque low Check instruction man uals clarifications recommended tachometer readings M/R tail STOCKMODIFIED 1WEDGESHAPEDSHIM\1 TO SUIT LJPJ3 REDUCED ANGLE I. / BLADE TRACKING BEND COLLECTIVE WIRE SO THAT ITCAN ENGAGE WITH INSIDE HOLE OF BELLCRANK tail too sensitive already using inside hole servo arm dont have dual rate transmitter try mode must no friction freedom movement T/R collective rod BLADE TRACKING NOTE ALL ANGLES EXAGGERATED FOR CLARITY COLORED TIP jSTATIC CONING ANGLE BOTI-IBLADESEQUAL I STATIC CONDITION RIGHT COLORED TIP~ BLADE DYNAMIC OW f LEVELS -~STATICCONING 2 DYNAMIC OUTOF TRACK0 REFERENCE LEVEL CONDITION WRONG COLORED TIP DYNAMIC LEVEL- BOTH % ADES IN TRACK - - --- STATIC CONING ~OREFERENCE LEVEL 3 DYNAMIC IN TRACK CONDITION though static coning angle 1 pitch set correctly minor differences blade airfoil flexibility may cause dynamic error 21 blade higher other Ad justment pitch both blades may necessary blades track same level proper lift-off achieved rotor Although have recommended machine restrained checking blade tracking should point out precise tracking may accom plished observing machine free flight course order first have know fly An outof-track rotor system complicates fly ing slightly Tall rotor adjustment tail rotor adjustment helicopter will need its freedom remove restraints select smooth level surface fire up engine have everyone stand back face ma chine wind slowly advance throttle used eyeball method static adjustment noted last month youll probably find machine gets light nose will begin yaw right indicates too much tail rotor pitch Try correct yawing tendency transmitter trim finally tail rotor stick Continue advance throttle concentrate nose machine machine breaks ground slow yaw left right main stick neutral static adjustments probably pretty close Land machine make appro priate adjustments T/R pitch control light condition just prior lift off machine seems overly sensitive tail rotor control may wish re Continued page 100 March 1979 29 WHY Just fun stick FIRE BALL great engine runs *advanced ...... .. H STARTING 0 UNEXCELLED POWEP LOWEST DRAIN LONGER LIFE GLOW PLUGS SWANSON ASSOCIATES P0 BOX 151WAYNE NEW JEBSEY 07470 JINTERNATIONAL INC REPLA-TEC H MC KENZIE 1-IWY PLAN SI VIOA OREGON 974B8 GEE BEE Z DECALS ALL NUMBERS 21 SCALE & LETTERING 4 * EXCEPTi4h-t1tl THOSE OF THE WINGS GRANGE R WILLIAMS$495 PAWNER STREET SAN MARCOS CALIFORNIA 92069 gear greater extent light trainer possible gear prototype should copied making certain loads spread surrounding structure Avoid load concentrations single points 1978 Contests No single competition event has caught like Sport Scale Last year ten times sanc tioned AMA contests Sport Scale Precision Scale other scale events combined eastern US scale events midwest least breakdown follows no rallys included Radio Control total 184 Sport 165 Precision 16 Mammoth 3 Control Line total 31 Sport 20 Preci sion 11 Free Flight Outdoor total 51/ Gas 9 Rubber 15 Peanut 27Indoor total 18 Indoor 10 Peanut 8 high level participation RC Sport Scale generates much comment complaints Bob Temple Boca Raton Florida writes suggestions what would like see Stand-Off Scale 1 50-ft circle 10 feet way too small especially 8- 9-ft wing spans 2 Novice Expert same Pattern Gives newcomers better chance Once has won first place moves Expert 3 Time limit static judging less conversing between judges allowed flight should allowed static Actually nine-foot span compared six feet has wing tip 18 inches closer judges eyes change present 20-foot circle 25 feet would compensate maintain original intent rule desire greater viewing distance reaction trend Sport Scale toward general up-grading planes has happened throughout history competition modeling process improvement repeats events imposition rule changes has failed bring halt up-grading Finding good judges remains problem getting tough wont ease situation Judges regarded adversaries have no event Bob Dolly Wischer Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Helicopters/Chesney continued page 29 duce tail sensitivity using rate control transmitter moving tail rotor control rod toward center servo arm methods shown sketches Tail rotor sensitivity should adjusted response input positive fast cause tendency over-control Since proper control tail important successfully flying ma chine wise devote special attention T/R response set-up may elect purchase Kavan gyro make life little easier keep mind T/R control should never neglected learning fly RC helicopter T/R gyro assisted opinion difficulty main taining yaw heading helicopter due largely bad habits developed flying fixed-wing aircraft feel majority fixed-wing sport fliers de velop habit neglecting left stick Mode II throttle rudder controls fact dare say touch throttle rudder average flight therefore feel less com fortable absolute necessity controls flying helicopter sport fliers 3-channel aircraft set up rudder control ail eron stick again neglects need left stick activity point helicopters difficult fly poor habits such noted above will complicate learning process recommend fixed-wing ac tivities minimized learn helicopter controls must fly airplanes least concentrate using flight controls during fixedwing flying activitiesget comfortable left stick Next month some tips hope theyre helping let hear Dont forget meeting Toledo Show April 6 7 8 helicopter enthu siasts will meet Saturday night time place announced show Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Soaring/Pruss continued page 3 1 aluminum molds allowed cure finish flawless trailing edges al sharp enough used shaving barn door type ailerons span about one-half wing have see fit believe hinge line con cave/convex joint could slip sheet notebook paper between wing aileron hinge joint hinges themselves Robarts three pe aileron ailerons driven through torque tube 5-mm wire main wing support much smaller diameter wire keeps wings aligned During same meeting between ses sions watched 1200 feet F3B compe tition held Europe guys build well fly better Although have ships seemingly traded off duration speed won contest Europe speeds phenomenal 11 seconds seems barrier US fliers Austrians turning nines Speed 25% F3B contest strategy particular task emphasis varies different fliers Frankly feel birds too speed-oriented argue success As availability models dont rush local hobby shop As Fritz put efforts secret feel club should develop own designs offering data building techniques book will available sometime late spring However club flush Fritz will travel youre willing host him pay expenses hell tell show Are still raised eyebrows out Dan Pruss Rt 2 Box 490 Plainfield IL 60544 writing advertisers mention read about Model Aviation 100 Model Aviation #H30 HOT 3 volts foster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition