I Helicopters EJ Wall Schoonard COLLECTIVE PITCH Constant Blade Speed us old-timers began flying helicopters fixed pitch Just getting fly great accomplishment Much flying skill very skillful use motor speed throttle control heli copters seemed very complicated collective pitch mentioned threw real chill us just think additional complexity course history collective pitch wellestablished fact came some new problems such ever-changing blade speed need tail-rotor mix changing blade speed have ever-changing control response high blade speed control quick pre cise tail-rotor control sensitivity decreases decrease tail-blade speed So get closer ground legend own time Ernie Huber flies Hughes 600 Jet Ranger mechanics East Coast RC Helicopter Championships Machine similar flown upcoming movie simulate real action Ernie fivetime AMA helicopter champ Photograph Bibi Phillips need better control actually have less first flew collective pitch still learning fly did everything slowly rather deliberately soon became apparent needed tail-rotor mix constant-blade speed both looked several real helicopters talked some pilots helicopter engi neers found real helicopters indeed have tail-rotor mixwell long pilot controls ever-present tail-rotor mix gives whatever necessary keep machine headed wants go Yes have constant-blade speed Continued page 84 24 Model Aviation elaborate transmitter used Laforest fly dual rotor-head machine has two sticks dual rudder knobs much Left Ambitious project Gilbert Laforest features counter rotating heads negate torque Webra Speed 60 drives both heads have separate cyclic collective control Required own-designed transmitter Right Tach-Tron installation Kaven Jet Ranger Walt says would fly another collective machine governor Developed Al Irwin device available Royal-Electronics see textl Norm Hollands neat scratch-built uses aluminum angle tubing frame Has wide separation upper lower main shaft bearings Interesting T-tailed KnIt Hughes 500 has improvements will available soon Miniature Aircraft Supply wing fighter later F-106 After war Convair developed model 110 Commercial Transport followed 240 440 880 Development going on Atlas missile under direction wonderful man Karl Bossart 1952 five years before Sputnik speculated payloadthe warheadwere replaced fuel speed 17500 mphor bital speedcould attained might serve booster moon ye... Other members design team included Don Hall designer Spirit St Louis Etienne Dormoy early French designers Anthony Fokkerthe namesake uncle great Dutch designer Ger man WW aircraft 1952 Mr Powers talents ar chitectural illustrator demand Accordingly reluctantly took years leave absence 1952 still After 25 years architectural work still keeps interest aeronautics grandson now both avid model builderswhere Brad gan Whether months Openers has come close too soon us too late reader should clue next month Less weight payload Thats promise R C Helicopters/Schoonard continued page 24 pilot can set will maintain speed no matter much little collective induced facts made sense began develop cams would give constant blade speed servo collective transmitter function long evenings making trying different cams machine checking tailrotor speed tachome ter finally got what wanted gave much better flying helicopter cause better control actually easier fly cams have used Cobras Heli-Babies Bell 212s name great deal success After hard work done simple matter cut out cam 1/16 phenolic lay out pushrods posi tion install collective servo output wheel go fly got could set up bench machine first flew required no adjustments got great deal personal satisfaction soon found no matter described articles very few people could make work ma chines About time Al Irwin sent Tach-Tron try out required another servo some elaborate wiring ad justments did work described Frankly too impressed time because did practically what 10-cent cam did soon took off went back cam However later decided given Tach Tron enough try reinstated Jet Ranger have since flown several other helicopters am now sold would fly collective machine Tach-Tron governor can set blade speed wish can set light ma chine light blades heavy blades senses what doing feeds proper control motor servo keep blade speed constant really great putting along jam collective already set blade speed watch machine perform interested realistic performance smoother easier flying recommend Al Irwins Tach-Tron Royal Electronics Corp 6190 E Evans Avenue Box 22424 Denver CO 80222 phone 303 761-5960 unit can purchased kit form completely assembled ready install Royal can install servo feedback wire motor servo make two versions Tach-Tron recommend governor type controls blade speed collective pitch adds subtracts col lective life cannot see type could used advantage get Tach-Tron sure carefully read instructions installation adjustment As pictures show have installed under swashplate counter mounted aluminum box former #9 Several things would like caution about Because constant blade speed want come out air must have couple degrees negative available Also landing ground take eyes off machine have left blade speed high cyclic control gust wind could upset pride joy took little getting used nearly let upset gusty day taught hard quick lesson fly single stick helicopters have relocated channel control lever can collective Tach-Tron functions same hand Tach-Tron order blank vital part ordering unit blank asks some very pertinent questions must answered can set up unit properly blank can obtained writing Royal address above Second Annual East Coast Championships Several contestants arrived Saturday August 13 day before contest some practice flying beautiful Thompson Park contest site 500 X 1500 feet nicely groomed grass Among early birds Ernie Huber five-time AMA RC Helicopter National Cham pion Ernie flying fIughs 500 Jet Ranger mechanics machine similar ones flew upcoming Holly wood movie Ernie put show us spellbound did couple rolls loops tried another 1oop didnt come off just right ma chine tumbled good 100 feet ever regained control ma chine pulled out engine groan ing will never know did made look easy boot Another well-known chopper pilot beautifully scratchbuilt machines Faye Peoples put very nice show including specialty maneuver known stall turn two 360s Thats 900 degrees case lost count Spec tacular Faye has probably established some kind reliability record now day contest little no wind rains came won der managed complete full round competition en couraging see increase participa tion 25 versus 19 last year total entries Moreover no crashes fly ing skills observed year dramat ic improvement over last year 16 entries Novice 6 entries Intermediate 3 entries Expert numbers compare 14 1 4 Novice Intermediate Expert classes last years contest Thus can seen some pilots graduat ing next higher class variety machines flown 7 Jet Rangers 5 Revolutions 4 Heli babies 3 Alouettes 2 Sharks 1 Hughes 500 Alouette mechanics 1 Hughes 500 Jet Ranger mechanics 2 scratchbuilts majority powered Schnuerle-type engines special thanks due members Monmouth Model Airplane Club able willing help run con test winners C Sjobeck Novice T Kneer Intermediate E Huber Expert turn page 84 Model Aviation has elaborate main rotor control systems Seen Gene Rocks ma chine flown East Coast Champs Phillips pic SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE CIAPITCHPRICE 5%3489 63489 733%4119 53%456129 94566% 77%139 10467149 1066V 8W149 to6016159 114677% 7Y, 7%8159 it6E1W169 11%67169 126179 12555179 1356219 1496249 1566309 164%6389 W 55106 BLADE 855 EXTRA WIDE SERIES 400 B Poe SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED REGGRO HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 6%3%4129 755%6149 7SN 5/N 6N149 8%6% 6% 7 7%7%189 96%7 7A7%189 CONTROL LINE SPEED& RACING CIA PITCHPRICE 4/8A7129 4%55%129 6788%149 7 7%10%11169 889189 89N9%N189 8% 77%189 912 13219 51ARRflW Homebuilts Bill Youmans firstplace win Masters Class Greenville NRCHA Nationals last August seems increasing interest homebuilt helicopters won scratchbuilt own design composite components Bill came within 10 points aceing hover course local flier Norm Holland has developed scratchbuilt using Kavan mechanics tn-cycle landing gear Rev-o-lution canopy Futaba Sl5M ball-bearing servos EK single-stick radio Kraft engine Tach-Tron gover nor weight 12 1/2 pounds very smooth precise enough people inter ested could soon put kit form Look column further details Dual Counter Rotating Head ScratchBuilt Gilbert Laforest Montreal suc cessfully flew counter rotating-head heli copter own design Greenville NRCHA Nats Webra Speed 60 driving both heads unbelievably complicated pushrod system Self-designed transmitter two single sticks dual rudder knobs much Separate collective control head well separate cyclic control Tremendous under taking say nothing about getting mind synchronized hands Radio custom Can-Air Canadian ProLine some radio interference problems Next months column will cover unique finish helicopters first part building Aerospatiale SA-34 1 G Gazelle ducted fan-tail rotor youre flying youre trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Letters continued page 7 quality Model viation money best model aviation magazine field William R Barr AMA 31415 Claremont CA MA policy publish types models eventually shall get around Mr Barrs suggestions Mistaken Identity No doubt have received few letters already rare event havent would like point out photograph lower right hand corner page 25 Aug 1977 issue Model viation incorrectly captioned gentleman photo Rick Pear son winner last years Soar Nats well other contests sailplane holding Paragon Rick did outstanding job flying under less ideal conditions would shame did receive credit display flying skill Since generally true least 75% sailplanes performance direct function pilots skill would follow mention sailplane used would significant have no doubt uninten tional error know would want errors called attention proper caption can used Ed Slobod Pierce Aero Company Nonthridge CA Size It/Powers continued page 13 ing slower speed reduce somewhat power requirements because scaling down proto type its weight-empty condition rather its gross-weight condition thats ut Size Questions comments may ad dressed Bradford W Powers care magazine Seastrutz/Wi son continued page 18 full throttle some down-elevator Ed pulled up Seastrutz oil like scared duck full stall attitude 50 feet hit wind blowing toward hill blown end-over-end trees Damage minor Test flying continued next week Fall Brimfield meet time stabilizer shim under its leading edge rudder area doubled Seastrutz flew beautifully Among its test pilots Ted Straders son Eric testified flew very much like its predecessor Strutz Echo Seastrutz built mci dences shown will perform very well relatively docile its 46-in wing span compact biplane configuration felt might too quick average flier case diffi cult machine fly land water Have fun Radio Technique/Myers continued page 14 An ammeter measure charging discharging operating currents turntable drum-type chart feed measure servo transmit time shaker find intermittent prob lems heat lamp can Freezit similar chiller locate temperature-sensitive compon ents Special tools various types like desoldering irons Youve seen lot items listed under additional advertisements probability should leave will describe some simple non destructive tests should perform 86 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8%-6% new Pylon RaC ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb OP & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr 1st CLCIassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st FE Class B Open 1st FE Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OP HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PIDOF 1st CL Carrier II Op Jr Sr 1st CL Carrier Jr & Sr 1st CL Formula 40 Opec 1st CL Class 6 Proto Jr
Edition: Model Aviation - 1978/01
Page Numbers: 24, 84, 86
Edition: Model Aviation - 1978/01
Page Numbers: 24, 84, 86
I Helicopters EJ Wall Schoonard COLLECTIVE PITCH Constant Blade Speed us old-timers began flying helicopters fixed pitch Just getting fly great accomplishment Much flying skill very skillful use motor speed throttle control heli copters seemed very complicated collective pitch mentioned threw real chill us just think additional complexity course history collective pitch wellestablished fact came some new problems such ever-changing blade speed need tail-rotor mix changing blade speed have ever-changing control response high blade speed control quick pre cise tail-rotor control sensitivity decreases decrease tail-blade speed So get closer ground legend own time Ernie Huber flies Hughes 600 Jet Ranger mechanics East Coast RC Helicopter Championships Machine similar flown upcoming movie simulate real action Ernie fivetime AMA helicopter champ Photograph Bibi Phillips need better control actually have less first flew collective pitch still learning fly did everything slowly rather deliberately soon became apparent needed tail-rotor mix constant-blade speed both looked several real helicopters talked some pilots helicopter engi neers found real helicopters indeed have tail-rotor mixwell long pilot controls ever-present tail-rotor mix gives whatever necessary keep machine headed wants go Yes have constant-blade speed Continued page 84 24 Model Aviation elaborate transmitter used Laforest fly dual rotor-head machine has two sticks dual rudder knobs much Left Ambitious project Gilbert Laforest features counter rotating heads negate torque Webra Speed 60 drives both heads have separate cyclic collective control Required own-designed transmitter Right Tach-Tron installation Kaven Jet Ranger Walt says would fly another collective machine governor Developed Al Irwin device available Royal-Electronics see textl Norm Hollands neat scratch-built uses aluminum angle tubing frame Has wide separation upper lower main shaft bearings Interesting T-tailed KnIt Hughes 500 has improvements will available soon Miniature Aircraft Supply wing fighter later F-106 After war Convair developed model 110 Commercial Transport followed 240 440 880 Development going on Atlas missile under direction wonderful man Karl Bossart 1952 five years before Sputnik speculated payloadthe warheadwere replaced fuel speed 17500 mphor bital speedcould attained might serve booster moon ye... Other members design team included Don Hall designer Spirit St Louis Etienne Dormoy early French designers Anthony Fokkerthe namesake uncle great Dutch designer Ger man WW aircraft 1952 Mr Powers talents ar chitectural illustrator demand Accordingly reluctantly took years leave absence 1952 still After 25 years architectural work still keeps interest aeronautics grandson now both avid model builderswhere Brad gan Whether months Openers has come close too soon us too late reader should clue next month Less weight payload Thats promise R C Helicopters/Schoonard continued page 24 pilot can set will maintain speed no matter much little collective induced facts made sense began develop cams would give constant blade speed servo collective transmitter function long evenings making trying different cams machine checking tailrotor speed tachome ter finally got what wanted gave much better flying helicopter cause better control actually easier fly cams have used Cobras Heli-Babies Bell 212s name great deal success After hard work done simple matter cut out cam 1/16 phenolic lay out pushrods posi tion install collective servo output wheel go fly got could set up bench machine first flew required no adjustments got great deal personal satisfaction soon found no matter described articles very few people could make work ma chines About time Al Irwin sent Tach-Tron try out required another servo some elaborate wiring ad justments did work described Frankly too impressed time because did practically what 10-cent cam did soon took off went back cam However later decided given Tach Tron enough try reinstated Jet Ranger have since flown several other helicopters am now sold would fly collective machine Tach-Tron governor can set blade speed wish can set light ma chine light blades heavy blades senses what doing feeds proper control motor servo keep blade speed constant really great putting along jam collective already set blade speed watch machine perform interested realistic performance smoother easier flying recommend Al Irwins Tach-Tron Royal Electronics Corp 6190 E Evans Avenue Box 22424 Denver CO 80222 phone 303 761-5960 unit can purchased kit form completely assembled ready install Royal can install servo feedback wire motor servo make two versions Tach-Tron recommend governor type controls blade speed collective pitch adds subtracts col lective life cannot see type could used advantage get Tach-Tron sure carefully read instructions installation adjustment As pictures show have installed under swashplate counter mounted aluminum box former #9 Several things would like caution about Because constant blade speed want come out air must have couple degrees negative available Also landing ground take eyes off machine have left blade speed high cyclic control gust wind could upset pride joy took little getting used nearly let upset gusty day taught hard quick lesson fly single stick helicopters have relocated channel control lever can collective Tach-Tron functions same hand Tach-Tron order blank vital part ordering unit blank asks some very pertinent questions must answered can set up unit properly blank can obtained writing Royal address above Second Annual East Coast Championships Several contestants arrived Saturday August 13 day before contest some practice flying beautiful Thompson Park contest site 500 X 1500 feet nicely groomed grass Among early birds Ernie Huber five-time AMA RC Helicopter National Cham pion Ernie flying fIughs 500 Jet Ranger mechanics machine similar ones flew upcoming Holly wood movie Ernie put show us spellbound did couple rolls loops tried another 1oop didnt come off just right ma chine tumbled good 100 feet ever regained control ma chine pulled out engine groan ing will never know did made look easy boot Another well-known chopper pilot beautifully scratchbuilt machines Faye Peoples put very nice show including specialty maneuver known stall turn two 360s Thats 900 degrees case lost count Spec tacular Faye has probably established some kind reliability record now day contest little no wind rains came won der managed complete full round competition en couraging see increase participa tion 25 versus 19 last year total entries Moreover no crashes fly ing skills observed year dramat ic improvement over last year 16 entries Novice 6 entries Intermediate 3 entries Expert numbers compare 14 1 4 Novice Intermediate Expert classes last years contest Thus can seen some pilots graduat ing next higher class variety machines flown 7 Jet Rangers 5 Revolutions 4 Heli babies 3 Alouettes 2 Sharks 1 Hughes 500 Alouette mechanics 1 Hughes 500 Jet Ranger mechanics 2 scratchbuilts majority powered Schnuerle-type engines special thanks due members Monmouth Model Airplane Club able willing help run con test winners C Sjobeck Novice T Kneer Intermediate E Huber Expert turn page 84 Model Aviation has elaborate main rotor control systems Seen Gene Rocks ma chine flown East Coast Champs Phillips pic SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE CIAPITCHPRICE 5%3489 63489 733%4119 53%456129 94566% 77%139 10467149 1066V 8W149 to6016159 114677% 7Y, 7%8159 it6E1W169 11%67169 126179 12555179 1356219 1496249 1566309 164%6389 W 55106 BLADE 855 EXTRA WIDE SERIES 400 B Poe SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED REGGRO HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 6%3%4129 755%6149 7SN 5/N 6N149 8%6% 6% 7 7%7%189 96%7 7A7%189 CONTROL LINE SPEED& RACING CIA PITCHPRICE 4/8A7129 4%55%129 6788%149 7 7%10%11169 889189 89N9%N189 8% 77%189 912 13219 51ARRflW Homebuilts Bill Youmans firstplace win Masters Class Greenville NRCHA Nationals last August seems increasing interest homebuilt helicopters won scratchbuilt own design composite components Bill came within 10 points aceing hover course local flier Norm Holland has developed scratchbuilt using Kavan mechanics tn-cycle landing gear Rev-o-lution canopy Futaba Sl5M ball-bearing servos EK single-stick radio Kraft engine Tach-Tron gover nor weight 12 1/2 pounds very smooth precise enough people inter ested could soon put kit form Look column further details Dual Counter Rotating Head ScratchBuilt Gilbert Laforest Montreal suc cessfully flew counter rotating-head heli copter own design Greenville NRCHA Nats Webra Speed 60 driving both heads unbelievably complicated pushrod system Self-designed transmitter two single sticks dual rudder knobs much Separate collective control head well separate cyclic control Tremendous under taking say nothing about getting mind synchronized hands Radio custom Can-Air Canadian ProLine some radio interference problems Next months column will cover unique finish helicopters first part building Aerospatiale SA-34 1 G Gazelle ducted fan-tail rotor youre flying youre trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Letters continued page 7 quality Model viation money best model aviation magazine field William R Barr AMA 31415 Claremont CA MA policy publish types models eventually shall get around Mr Barrs suggestions Mistaken Identity No doubt have received few letters already rare event havent would like point out photograph lower right hand corner page 25 Aug 1977 issue Model viation incorrectly captioned gentleman photo Rick Pear son winner last years Soar Nats well other contests sailplane holding Paragon Rick did outstanding job flying under less ideal conditions would shame did receive credit display flying skill Since generally true least 75% sailplanes performance direct function pilots skill would follow mention sailplane used would significant have no doubt uninten tional error know would want errors called attention proper caption can used Ed Slobod Pierce Aero Company Nonthridge CA Size It/Powers continued page 13 ing slower speed reduce somewhat power requirements because scaling down proto type its weight-empty condition rather its gross-weight condition thats ut Size Questions comments may ad dressed Bradford W Powers care magazine Seastrutz/Wi son continued page 18 full throttle some down-elevator Ed pulled up Seastrutz oil like scared duck full stall attitude 50 feet hit wind blowing toward hill blown end-over-end trees Damage minor Test flying continued next week Fall Brimfield meet time stabilizer shim under its leading edge rudder area doubled Seastrutz flew beautifully Among its test pilots Ted Straders son Eric testified flew very much like its predecessor Strutz Echo Seastrutz built mci dences shown will perform very well relatively docile its 46-in wing span compact biplane configuration felt might too quick average flier case diffi cult machine fly land water Have fun Radio Technique/Myers continued page 14 An ammeter measure charging discharging operating currents turntable drum-type chart feed measure servo transmit time shaker find intermittent prob lems heat lamp can Freezit similar chiller locate temperature-sensitive compon ents Special tools various types like desoldering irons Youve seen lot items listed under additional advertisements probability should leave will describe some simple non destructive tests should perform 86 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8%-6% new Pylon RaC ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb OP & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr 1st CLCIassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st FE Class B Open 1st FE Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OP HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PIDOF 1st CL Carrier II Op Jr Sr 1st CL Carrier Jr & Sr 1st CL Formula 40 Opec 1st CL Class 6 Proto Jr
Edition: Model Aviation - 1978/01
Page Numbers: 24, 84, 86
I Helicopters EJ Wall Schoonard COLLECTIVE PITCH Constant Blade Speed us old-timers began flying helicopters fixed pitch Just getting fly great accomplishment Much flying skill very skillful use motor speed throttle control heli copters seemed very complicated collective pitch mentioned threw real chill us just think additional complexity course history collective pitch wellestablished fact came some new problems such ever-changing blade speed need tail-rotor mix changing blade speed have ever-changing control response high blade speed control quick pre cise tail-rotor control sensitivity decreases decrease tail-blade speed So get closer ground legend own time Ernie Huber flies Hughes 600 Jet Ranger mechanics East Coast RC Helicopter Championships Machine similar flown upcoming movie simulate real action Ernie fivetime AMA helicopter champ Photograph Bibi Phillips need better control actually have less first flew collective pitch still learning fly did everything slowly rather deliberately soon became apparent needed tail-rotor mix constant-blade speed both looked several real helicopters talked some pilots helicopter engi neers found real helicopters indeed have tail-rotor mixwell long pilot controls ever-present tail-rotor mix gives whatever necessary keep machine headed wants go Yes have constant-blade speed Continued page 84 24 Model Aviation elaborate transmitter used Laforest fly dual rotor-head machine has two sticks dual rudder knobs much Left Ambitious project Gilbert Laforest features counter rotating heads negate torque Webra Speed 60 drives both heads have separate cyclic collective control Required own-designed transmitter Right Tach-Tron installation Kaven Jet Ranger Walt says would fly another collective machine governor Developed Al Irwin device available Royal-Electronics see textl Norm Hollands neat scratch-built uses aluminum angle tubing frame Has wide separation upper lower main shaft bearings Interesting T-tailed KnIt Hughes 500 has improvements will available soon Miniature Aircraft Supply wing fighter later F-106 After war Convair developed model 110 Commercial Transport followed 240 440 880 Development going on Atlas missile under direction wonderful man Karl Bossart 1952 five years before Sputnik speculated payloadthe warheadwere replaced fuel speed 17500 mphor bital speedcould attained might serve booster moon ye... Other members design team included Don Hall designer Spirit St Louis Etienne Dormoy early French designers Anthony Fokkerthe namesake uncle great Dutch designer Ger man WW aircraft 1952 Mr Powers talents ar chitectural illustrator demand Accordingly reluctantly took years leave absence 1952 still After 25 years architectural work still keeps interest aeronautics grandson now both avid model builderswhere Brad gan Whether months Openers has come close too soon us too late reader should clue next month Less weight payload Thats promise R C Helicopters/Schoonard continued page 24 pilot can set will maintain speed no matter much little collective induced facts made sense began develop cams would give constant blade speed servo collective transmitter function long evenings making trying different cams machine checking tailrotor speed tachome ter finally got what wanted gave much better flying helicopter cause better control actually easier fly cams have used Cobras Heli-Babies Bell 212s name great deal success After hard work done simple matter cut out cam 1/16 phenolic lay out pushrods posi tion install collective servo output wheel go fly got could set up bench machine first flew required no adjustments got great deal personal satisfaction soon found no matter described articles very few people could make work ma chines About time Al Irwin sent Tach-Tron try out required another servo some elaborate wiring ad justments did work described Frankly too impressed time because did practically what 10-cent cam did soon took off went back cam However later decided given Tach Tron enough try reinstated Jet Ranger have since flown several other helicopters am now sold would fly collective machine Tach-Tron governor can set blade speed wish can set light ma chine light blades heavy blades senses what doing feeds proper control motor servo keep blade speed constant really great putting along jam collective already set blade speed watch machine perform interested realistic performance smoother easier flying recommend Al Irwins Tach-Tron Royal Electronics Corp 6190 E Evans Avenue Box 22424 Denver CO 80222 phone 303 761-5960 unit can purchased kit form completely assembled ready install Royal can install servo feedback wire motor servo make two versions Tach-Tron recommend governor type controls blade speed collective pitch adds subtracts col lective life cannot see type could used advantage get Tach-Tron sure carefully read instructions installation adjustment As pictures show have installed under swashplate counter mounted aluminum box former #9 Several things would like caution about Because constant blade speed want come out air must have couple degrees negative available Also landing ground take eyes off machine have left blade speed high cyclic control gust wind could upset pride joy took little getting used nearly let upset gusty day taught hard quick lesson fly single stick helicopters have relocated channel control lever can collective Tach-Tron functions same hand Tach-Tron order blank vital part ordering unit blank asks some very pertinent questions must answered can set up unit properly blank can obtained writing Royal address above Second Annual East Coast Championships Several contestants arrived Saturday August 13 day before contest some practice flying beautiful Thompson Park contest site 500 X 1500 feet nicely groomed grass Among early birds Ernie Huber five-time AMA RC Helicopter National Cham pion Ernie flying fIughs 500 Jet Ranger mechanics machine similar ones flew upcoming Holly wood movie Ernie put show us spellbound did couple rolls loops tried another 1oop didnt come off just right ma chine tumbled good 100 feet ever regained control ma chine pulled out engine groan ing will never know did made look easy boot Another well-known chopper pilot beautifully scratchbuilt machines Faye Peoples put very nice show including specialty maneuver known stall turn two 360s Thats 900 degrees case lost count Spec tacular Faye has probably established some kind reliability record now day contest little no wind rains came won der managed complete full round competition en couraging see increase participa tion 25 versus 19 last year total entries Moreover no crashes fly ing skills observed year dramat ic improvement over last year 16 entries Novice 6 entries Intermediate 3 entries Expert numbers compare 14 1 4 Novice Intermediate Expert classes last years contest Thus can seen some pilots graduat ing next higher class variety machines flown 7 Jet Rangers 5 Revolutions 4 Heli babies 3 Alouettes 2 Sharks 1 Hughes 500 Alouette mechanics 1 Hughes 500 Jet Ranger mechanics 2 scratchbuilts majority powered Schnuerle-type engines special thanks due members Monmouth Model Airplane Club able willing help run con test winners C Sjobeck Novice T Kneer Intermediate E Huber Expert turn page 84 Model Aviation has elaborate main rotor control systems Seen Gene Rocks ma chine flown East Coast Champs Phillips pic SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE CIAPITCHPRICE 5%3489 63489 733%4119 53%456129 94566% 77%139 10467149 1066V 8W149 to6016159 114677% 7Y, 7%8159 it6E1W169 11%67169 126179 12555179 1356219 1496249 1566309 164%6389 W 55106 BLADE 855 EXTRA WIDE SERIES 400 B Poe SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED REGGRO HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 6%3%4129 755%6149 7SN 5/N 6N149 8%6% 6% 7 7%7%189 96%7 7A7%189 CONTROL LINE SPEED& RACING CIA PITCHPRICE 4/8A7129 4%55%129 6788%149 7 7%10%11169 889189 89N9%N189 8% 77%189 912 13219 51ARRflW Homebuilts Bill Youmans firstplace win Masters Class Greenville NRCHA Nationals last August seems increasing interest homebuilt helicopters won scratchbuilt own design composite components Bill came within 10 points aceing hover course local flier Norm Holland has developed scratchbuilt using Kavan mechanics tn-cycle landing gear Rev-o-lution canopy Futaba Sl5M ball-bearing servos EK single-stick radio Kraft engine Tach-Tron gover nor weight 12 1/2 pounds very smooth precise enough people inter ested could soon put kit form Look column further details Dual Counter Rotating Head ScratchBuilt Gilbert Laforest Montreal suc cessfully flew counter rotating-head heli copter own design Greenville NRCHA Nats Webra Speed 60 driving both heads unbelievably complicated pushrod system Self-designed transmitter two single sticks dual rudder knobs much Separate collective control head well separate cyclic control Tremendous under taking say nothing about getting mind synchronized hands Radio custom Can-Air Canadian ProLine some radio interference problems Next months column will cover unique finish helicopters first part building Aerospatiale SA-34 1 G Gazelle ducted fan-tail rotor youre flying youre trying hard enough Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Letters continued page 7 quality Model viation money best model aviation magazine field William R Barr AMA 31415 Claremont CA MA policy publish types models eventually shall get around Mr Barrs suggestions Mistaken Identity No doubt have received few letters already rare event havent would like point out photograph lower right hand corner page 25 Aug 1977 issue Model viation incorrectly captioned gentleman photo Rick Pear son winner last years Soar Nats well other contests sailplane holding Paragon Rick did outstanding job flying under less ideal conditions would shame did receive credit display flying skill Since generally true least 75% sailplanes performance direct function pilots skill would follow mention sailplane used would significant have no doubt uninten tional error know would want errors called attention proper caption can used Ed Slobod Pierce Aero Company Nonthridge CA Size It/Powers continued page 13 ing slower speed reduce somewhat power requirements because scaling down proto type its weight-empty condition rather its gross-weight condition thats ut Size Questions comments may ad dressed Bradford W Powers care magazine Seastrutz/Wi son continued page 18 full throttle some down-elevator Ed pulled up Seastrutz oil like scared duck full stall attitude 50 feet hit wind blowing toward hill blown end-over-end trees Damage minor Test flying continued next week Fall Brimfield meet time stabilizer shim under its leading edge rudder area doubled Seastrutz flew beautifully Among its test pilots Ted Straders son Eric testified flew very much like its predecessor Strutz Echo Seastrutz built mci dences shown will perform very well relatively docile its 46-in wing span compact biplane configuration felt might too quick average flier case diffi cult machine fly land water Have fun Radio Technique/Myers continued page 14 An ammeter measure charging discharging operating currents turntable drum-type chart feed measure servo transmit time shaker find intermittent prob lems heat lamp can Freezit similar chiller locate temperature-sensitive compon ents Special tools various types like desoldering irons Youve seen lot items listed under additional advertisements probability should leave will describe some simple non destructive tests should perform 86 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8%-6% new Pylon RaC ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb OP & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr 1st CLCIassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st FE Class B Open 1st FE Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OP HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PIDOF 1st CL Carrier II Op Jr Sr 1st CL Carrier Jr & Sr 1st CL Formula 40 Opec 1st CL Class 6 Proto Jr
