Radio Control Helicopters Larry Jolly FASCINATING Im people really enjoys model aircraft doesnt matter what type Im fascinated As such Im usually inclined read model magazine cover cover same thing may have noticed page 127 January issue ModelAviation contained upto-theminute FAI World Records noticed six record categories Radio Control Helicopters following what lieve current records published January issue Ive converted metric values system 35 Duration 36 Distance straight line 37 Height 38 Speed 38 Dist closed course 56 Speed closed course 3 hr 35 mm 6sec 557 miles 36747 ft 568 mph 447 miles 449 mph FR Germany Australia USSR FR Germany Australia FR Germany records dont look too tough Did also notice records have USA after Wheres Yankee know-how bet records could captured Ameri can enthusiasts flying basically stock ma chines have get willing Contest Director make sure play rules record sanction AMA well FAI regulations known Sporting Codeand have Before get too far brainstorm make sure record-setting whirlybird fits FAI specifications FM definition Radio-Controlled Helicopter heavier-than-air aeromodel derives its lift horizontal Larrys all-time favorite full-scale Chop perthe Slkorski 5-78 Biackhawk Hes got good history months text propulsion power-driven rotor sys tem rotating about nominally-vertical axis must also fit within following characteristics maximum swept area lifting rotors 300 din2 4650 sq must weigh 1322 pounds takeoff largest engine can use 61 Which records should tackle first As far cn see Altitude record going begging should fairly obvious machines flew last years Nationals capable topping 4000 ft also pretty obvious no standing ground going fly machine 4000 ft viewing naked eye aid full-size helicopter carrying pilot model Contest Director barograph RC Helicopter should able top 7000 ft probably As Duration Distance same Helicopter could used both tasks would probably use 50-size machine maybe Baron Cobra Id use mainly because lightbut importantly could easily lengthen tail boom accommodate longer rotor blades will necessary utilize low-oil fuel better yet spark ignition compression ignitionto realize required engine run think running takeoff will also necessary get airborue maximum fuel load What about Speed Speed records currently held stock Schiuter Su periors believe task others largely governed pilot know fact Superior will fly faster 60mph Back 1979 Tim Jones chased Webra Speedpowered Heliboy over 75 mph machines certainly capable enough rest just up pilot some serious about going after records may helpful form groups attempting records anything matter nothing beats well-organized interested group months photos Speaking wellorganized groups months photos some hand-crafted originals AME group now headed Herbert Sitar will remember AME group Sailplanes Pfeil Dassel After winning F3B World Championships 1979 group drifted out spotlight According Rick Schrameck supplied pictures Sitars became interested Helicopters help some interested Swiss friends have come up quite menag erie up-to-date machines Apparently machines origi Continued Page 138 52 Model Aviation Herbert Sitars fabulous Beii 222 fuss Switzeriand its scratch-built features fiber giass fuseisge rotor biadesi Look closely youii see retracts have shock-struts tali rotor iooks Kavan-style features high-speed blades Rotor flybariess Machine acrobatic itfiles 81 engine RickSchrameck photo ii quartet tinely-cranted original Helicopters belongs members Swiss AME groupthe same ones developed famous Dassel Sailplane few years ago use similar mechanics rotor components Photo Rick Schrameck World Aerobatic Champion L eos Laser Alsuhnm Lending Gear Fean WingAC Spas Whig Arum 1440 sqin Boise Risk Kit Complete Step ky Step leeftuotlom milk Pictures WeIght 16-20 EngIne 2-4 HP 95 19 PLUS Sales~N ROUSH MFG Tough Ut Ply Babe aud Foom Comtroctloo 64 Wlagipas Wing Are 640 Welgkt6to6YIks Baglee 45 604 2 cycle S hr Assembly lieu 89 Jr Stick Outstanding Large Trainer $9995 Dealer Inquiry Invited Manufacturers Quality Kits Send $100 complete catalog Turbo BD-4 Famous Homebuilt Light Plane mitting lots water flow current relatively heavy load other hand pinhole large resistance light load Thus tank battery will empty faster heavy load low resistance large pipe much slower pinhole condition light load As extremes no hole essentially open circuit permits no current flow Its like battery cell sitting shelf nothing connected short circuit such heavy wire placed across terminals charged battery would cause enormous current flow just entire bottom water tank removed once resulting inevitably tremendous flow water Thus amount water flow dependent both depth water overhead tank external condi tions pipe water load Elec trical current similarly dependent available battery voltage load resistance connected battery Putting water tank requires work Consider filling tank bucket time Up ladder Thats work has carry water against pull gravity get tank higher tank work effect work done imparting stored energy water Just simple fact water tank has elevation means water has potential energy Similarly charged model battery has stored energy model battery charged car battery energy ultimately came gasoline fueled auto engine turned alternator charged car battery Work done Like given size water tank Electric model battery big can hold its fill Think about concepts next month well get basic ideas can apply Well take look multimeters work use what readings mean few basics under belt youll have much better understanding things Electricsuch motor/bat tery circuit plane charger works should find hobby enjoyable fact its partly just kind question get incoming mail has prompted 'minilesson' basic electricity Let close acknowledgement some reader response earlier col umn Way back November 1984 issue offered no-rules approach getting simple Electric competition off running As part argument voiced model size power system makeup matter much fact Electrics will perform similarly independent size power-system makeup still maintaln position However same time must candor recognize matter degree reader has pointed out large planes fly better small onesthis based Reynolds number having nothing Electric pow er other power source Thus can argue Giant Scale flies better Peanut Scale context agree Secondly another reader called California point out large glider can seen farther small plane thus flight time can potentially longer former Having just gotten trifocal glasses couldnt agree still say let anything Electric fly early competitions After what pur pose served having book full Electric competition rules no interest ed able participants participant must come first Suppose right now national AMA set Electric competition rules governing size motors batteries whatever Can tell very active Elec tric enthusiast could go fly Elec tric contest Any reader comments questions can sent SASE please author meantime Happy Landings Bob Kopski 2S West End Dr Lans dale PA 19466 writing advertisers mention read about thorn Model Aviation RC Helicopters/Jolly Continued page 52 nal except tail-rotor assembly spection leads believe Kavan Kavan copies also suspect strong Kavan influence throughout de sign note anti-clockwise rotation rotor Also note super-looking flybar less rigid rotorhead now have set Sitars rotor blades epoxy fiberglass over blue foam incredible weigh 150 grams much stronger truer conventional wood blade Rick told machines available completely finished ra dio choice installed Im supposed see Bell 222s firsthand January can bet full report will follow months three-view all-time favorite helicopter Sikorsky S-67 Blackhawk following Military Helicopters World high-speed helicopter gunship developed Sikorsky private venture response Vietnam combat experience Some Blackhawks features based Sikorsky S-66 entry US Armys 1965 competition Advanced Aerial Fire Support System AAFSS well flight experience S-61 F compound helicopter De sign S-67 began August 1969 sole Blackhawk built flew first time exactly year later Although touted highly maneuverable gunship Blackhawk could employed troop carrier well style later Soviet Mi-24 Hind Designed outset gunship Blackhawk all-metal semimon ocoque fuselage narrow cross sec tion pilot copilot/gunner seated tandem forward beneath single Plexiglass canopy As troop carrier main fuselage cabin could divided two levels upper deck seating 15 troops lower section housing fuel ammunition Continued page 140 1 38 Model Aviation Rear 3405 Cleveland Ave SW Canton OH 44707 Phone 216 484-6810 IAS0 S~GREAT LAKES 4gj RC HELICOPTERS 321 Koiwinac Street ha WI 54952 722-5025 DIGITAL HELI-TACH now possible set rotor rpm factory specs safety problems currently associated task new tachometer attaches directly helicopter rotor rpm indicated easyto-read liquid crystal display hover Lightweight durable 3A oz comes ready use batteries instructions LIST PRICE6895 INTRODUCTORY PRICE .. 5895 info product send SASE HA VING PROBLEMS GREAT LAKES FUSELAGE KITS 1 HUGHES 500 KALT 20/MINI-BOY Fiberglass13895 2 JET RANGER KALT 30/MINI-BOY Fiberglass13895 3 JET RANGER GMP CRICKET Plastic 5895 4 HUGHES 500 GMP CRICKET PlasticS 6895 Tp COWEYITO MO 0661H COIWRtWOE PRO w/auto3643 0561H CODRA OS FSRH CRICKET1WII OS28FSRH 419 5143 umrnaz CElL OS6IFSRH OM 3U401 SUPER iWNI-DOT autorotation OS45FSRH SW95 CALL FOR HELP! PRICES GOOD THROUGH MARCH 31 1985 s~tvicm OFFERED custom Building Set Up Flight Inatniction Club Oroup Demonstrations Send $200 catalog INFO $0425 add $350 $264100 add $450 $101 over add $600 UPS COD Blue Label extra Personal Checks will held 30 days VISA Mastercard Minii wisconsin residents add 5% sales tax tail configuration consisted sweptback vertical fin extended below fuselage upper section fin housed anti-torque rotor five-blad ed rotor being fitted left side horizontal stabilizer could set vertical position hovering flight also provided main landing gear retracted fuselage fixed tail wheel vertical fin Stub wings easily detached fitted help off-load rotor during high-speed flight gunship role Blackhawk used wings carry missiles rockets four stations plus wing-end stations Sidewinder airtoair missiles Two 1500 hp General Electric turboshaft engines fitted above low-profile fuselage powered five-bladed main ro tor well anti-torque rotor aircrafts dynamic components modi fied S-61 R helicopter Wingspan 27 feet 4 inches Typical armament loads 16 TOW antitank missiles eight 19-round 275inch rocket pods plus Sidewinders An under-fuselage turret essentially 3600 field fire could fitted 20mm 30mm cannon multi-barrel 20mm cannon 40mm grenade launch er Without external ordnance troops up four tons cargo could carried sling Blackhawk civil N67 1 SA flight tested 1970 1974 its original configuration helicopter reached record speed 216844 mph three-kilometer course December 1970 laterthat month reached 220885 mph 15/25-kilometer course Sikorsky received Army funding modify tail configuration ducted-fan system Flight testing mode began 1974 speeds 230 mph achieved dive aircraft reconfigured its original tail later year crashed September 1974 addition its payload versatility Blackhawk demonstrat ed very high degree maneuverability remember first time saw some film footage incredible machine flight S-67 did normal helicopter moves also looped rolled flew faster 200 mph sole S-67 crashed 1974 Farnborough air show England during low-level roll machine completely destroyed remember seeing S-67 tail-rotor blades Dave Niemans shop 1976 apparently having re trieved half-mile crash Pete Ashford US government decided against S-67 possible US military weapon its interesting note care fully Soviets looked According Czech aviation magazine article written 1974 entitled Another Ml Soviets carefully scrutinized American S-67 impressed new helicopter Mi-24 Hind designed basis technical specifications similar Sikorsky 5-67 Blackhawk attack helicopter am now working plug Blackhawk fuselage hope flying springtime BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 53 Hey US filers much invitation want now remainder report Paul Bowman Needle valve assembly standard OPS needle valve assembly lock nut type design has proven very reliable Vibration caused engine loosens locking nut allowing needle vibrate away its origi nal setting eliminate problem OPS assembly best replaced OS spring-type assembly may glued place using epoxy resin may also used plug redundant hole venturi side OS spring-type assem bly has positive click-by-click action allowing precise mixture adjustment made Fuel pressurization various methods fuel pressurization available 140 Model Aviation Complete Parts & Service both GMP SCHLUTER Heilcopten HELICOPTER HOTLINE 414 722-5025
Edition: Model Aviation - 1985/03
Page Numbers: 52, 138, 140
Edition: Model Aviation - 1985/03
Page Numbers: 52, 138, 140
Radio Control Helicopters Larry Jolly FASCINATING Im people really enjoys model aircraft doesnt matter what type Im fascinated As such Im usually inclined read model magazine cover cover same thing may have noticed page 127 January issue ModelAviation contained upto-theminute FAI World Records noticed six record categories Radio Control Helicopters following what lieve current records published January issue Ive converted metric values system 35 Duration 36 Distance straight line 37 Height 38 Speed 38 Dist closed course 56 Speed closed course 3 hr 35 mm 6sec 557 miles 36747 ft 568 mph 447 miles 449 mph FR Germany Australia USSR FR Germany Australia FR Germany records dont look too tough Did also notice records have USA after Wheres Yankee know-how bet records could captured Ameri can enthusiasts flying basically stock ma chines have get willing Contest Director make sure play rules record sanction AMA well FAI regulations known Sporting Codeand have Before get too far brainstorm make sure record-setting whirlybird fits FAI specifications FM definition Radio-Controlled Helicopter heavier-than-air aeromodel derives its lift horizontal Larrys all-time favorite full-scale Chop perthe Slkorski 5-78 Biackhawk Hes got good history months text propulsion power-driven rotor sys tem rotating about nominally-vertical axis must also fit within following characteristics maximum swept area lifting rotors 300 din2 4650 sq must weigh 1322 pounds takeoff largest engine can use 61 Which records should tackle first As far cn see Altitude record going begging should fairly obvious machines flew last years Nationals capable topping 4000 ft also pretty obvious no standing ground going fly machine 4000 ft viewing naked eye aid full-size helicopter carrying pilot model Contest Director barograph RC Helicopter should able top 7000 ft probably As Duration Distance same Helicopter could used both tasks would probably use 50-size machine maybe Baron Cobra Id use mainly because lightbut importantly could easily lengthen tail boom accommodate longer rotor blades will necessary utilize low-oil fuel better yet spark ignition compression ignitionto realize required engine run think running takeoff will also necessary get airborue maximum fuel load What about Speed Speed records currently held stock Schiuter Su periors believe task others largely governed pilot know fact Superior will fly faster 60mph Back 1979 Tim Jones chased Webra Speedpowered Heliboy over 75 mph machines certainly capable enough rest just up pilot some serious about going after records may helpful form groups attempting records anything matter nothing beats well-organized interested group months photos Speaking wellorganized groups months photos some hand-crafted originals AME group now headed Herbert Sitar will remember AME group Sailplanes Pfeil Dassel After winning F3B World Championships 1979 group drifted out spotlight According Rick Schrameck supplied pictures Sitars became interested Helicopters help some interested Swiss friends have come up quite menag erie up-to-date machines Apparently machines origi Continued Page 138 52 Model Aviation Herbert Sitars fabulous Beii 222 fuss Switzeriand its scratch-built features fiber giass fuseisge rotor biadesi Look closely youii see retracts have shock-struts tali rotor iooks Kavan-style features high-speed blades Rotor flybariess Machine acrobatic itfiles 81 engine RickSchrameck photo ii quartet tinely-cranted original Helicopters belongs members Swiss AME groupthe same ones developed famous Dassel Sailplane few years ago use similar mechanics rotor components Photo Rick Schrameck World Aerobatic Champion L eos Laser Alsuhnm Lending Gear Fean WingAC Spas Whig Arum 1440 sqin Boise Risk Kit Complete Step ky Step leeftuotlom milk Pictures WeIght 16-20 EngIne 2-4 HP 95 19 PLUS Sales~N ROUSH MFG Tough Ut Ply Babe aud Foom Comtroctloo 64 Wlagipas Wing Are 640 Welgkt6to6YIks Baglee 45 604 2 cycle S hr Assembly lieu 89 Jr Stick Outstanding Large Trainer $9995 Dealer Inquiry Invited Manufacturers Quality Kits Send $100 complete catalog Turbo BD-4 Famous Homebuilt Light Plane mitting lots water flow current relatively heavy load other hand pinhole large resistance light load Thus tank battery will empty faster heavy load low resistance large pipe much slower pinhole condition light load As extremes no hole essentially open circuit permits no current flow Its like battery cell sitting shelf nothing connected short circuit such heavy wire placed across terminals charged battery would cause enormous current flow just entire bottom water tank removed once resulting inevitably tremendous flow water Thus amount water flow dependent both depth water overhead tank external condi tions pipe water load Elec trical current similarly dependent available battery voltage load resistance connected battery Putting water tank requires work Consider filling tank bucket time Up ladder Thats work has carry water against pull gravity get tank higher tank work effect work done imparting stored energy water Just simple fact water tank has elevation means water has potential energy Similarly charged model battery has stored energy model battery charged car battery energy ultimately came gasoline fueled auto engine turned alternator charged car battery Work done Like given size water tank Electric model battery big can hold its fill Think about concepts next month well get basic ideas can apply Well take look multimeters work use what readings mean few basics under belt youll have much better understanding things Electricsuch motor/bat tery circuit plane charger works should find hobby enjoyable fact its partly just kind question get incoming mail has prompted 'minilesson' basic electricity Let close acknowledgement some reader response earlier col umn Way back November 1984 issue offered no-rules approach getting simple Electric competition off running As part argument voiced model size power system makeup matter much fact Electrics will perform similarly independent size power-system makeup still maintaln position However same time must candor recognize matter degree reader has pointed out large planes fly better small onesthis based Reynolds number having nothing Electric pow er other power source Thus can argue Giant Scale flies better Peanut Scale context agree Secondly another reader called California point out large glider can seen farther small plane thus flight time can potentially longer former Having just gotten trifocal glasses couldnt agree still say let anything Electric fly early competitions After what pur pose served having book full Electric competition rules no interest ed able participants participant must come first Suppose right now national AMA set Electric competition rules governing size motors batteries whatever Can tell very active Elec tric enthusiast could go fly Elec tric contest Any reader comments questions can sent SASE please author meantime Happy Landings Bob Kopski 2S West End Dr Lans dale PA 19466 writing advertisers mention read about thorn Model Aviation RC Helicopters/Jolly Continued page 52 nal except tail-rotor assembly spection leads believe Kavan Kavan copies also suspect strong Kavan influence throughout de sign note anti-clockwise rotation rotor Also note super-looking flybar less rigid rotorhead now have set Sitars rotor blades epoxy fiberglass over blue foam incredible weigh 150 grams much stronger truer conventional wood blade Rick told machines available completely finished ra dio choice installed Im supposed see Bell 222s firsthand January can bet full report will follow months three-view all-time favorite helicopter Sikorsky S-67 Blackhawk following Military Helicopters World high-speed helicopter gunship developed Sikorsky private venture response Vietnam combat experience Some Blackhawks features based Sikorsky S-66 entry US Armys 1965 competition Advanced Aerial Fire Support System AAFSS well flight experience S-61 F compound helicopter De sign S-67 began August 1969 sole Blackhawk built flew first time exactly year later Although touted highly maneuverable gunship Blackhawk could employed troop carrier well style later Soviet Mi-24 Hind Designed outset gunship Blackhawk all-metal semimon ocoque fuselage narrow cross sec tion pilot copilot/gunner seated tandem forward beneath single Plexiglass canopy As troop carrier main fuselage cabin could divided two levels upper deck seating 15 troops lower section housing fuel ammunition Continued page 140 1 38 Model Aviation Rear 3405 Cleveland Ave SW Canton OH 44707 Phone 216 484-6810 IAS0 S~GREAT LAKES 4gj RC HELICOPTERS 321 Koiwinac Street ha WI 54952 722-5025 DIGITAL HELI-TACH now possible set rotor rpm factory specs safety problems currently associated task new tachometer attaches directly helicopter rotor rpm indicated easyto-read liquid crystal display hover Lightweight durable 3A oz comes ready use batteries instructions LIST PRICE6895 INTRODUCTORY PRICE .. 5895 info product send SASE HA VING PROBLEMS GREAT LAKES FUSELAGE KITS 1 HUGHES 500 KALT 20/MINI-BOY Fiberglass13895 2 JET RANGER KALT 30/MINI-BOY Fiberglass13895 3 JET RANGER GMP CRICKET Plastic 5895 4 HUGHES 500 GMP CRICKET PlasticS 6895 Tp COWEYITO MO 0661H COIWRtWOE PRO w/auto3643 0561H CODRA OS FSRH CRICKET1WII OS28FSRH 419 5143 umrnaz CElL OS6IFSRH OM 3U401 SUPER iWNI-DOT autorotation OS45FSRH SW95 CALL FOR HELP! PRICES GOOD THROUGH MARCH 31 1985 s~tvicm OFFERED custom Building Set Up Flight Inatniction Club Oroup Demonstrations Send $200 catalog INFO $0425 add $350 $264100 add $450 $101 over add $600 UPS COD Blue Label extra Personal Checks will held 30 days VISA Mastercard Minii wisconsin residents add 5% sales tax tail configuration consisted sweptback vertical fin extended below fuselage upper section fin housed anti-torque rotor five-blad ed rotor being fitted left side horizontal stabilizer could set vertical position hovering flight also provided main landing gear retracted fuselage fixed tail wheel vertical fin Stub wings easily detached fitted help off-load rotor during high-speed flight gunship role Blackhawk used wings carry missiles rockets four stations plus wing-end stations Sidewinder airtoair missiles Two 1500 hp General Electric turboshaft engines fitted above low-profile fuselage powered five-bladed main ro tor well anti-torque rotor aircrafts dynamic components modi fied S-61 R helicopter Wingspan 27 feet 4 inches Typical armament loads 16 TOW antitank missiles eight 19-round 275inch rocket pods plus Sidewinders An under-fuselage turret essentially 3600 field fire could fitted 20mm 30mm cannon multi-barrel 20mm cannon 40mm grenade launch er Without external ordnance troops up four tons cargo could carried sling Blackhawk civil N67 1 SA flight tested 1970 1974 its original configuration helicopter reached record speed 216844 mph three-kilometer course December 1970 laterthat month reached 220885 mph 15/25-kilometer course Sikorsky received Army funding modify tail configuration ducted-fan system Flight testing mode began 1974 speeds 230 mph achieved dive aircraft reconfigured its original tail later year crashed September 1974 addition its payload versatility Blackhawk demonstrat ed very high degree maneuverability remember first time saw some film footage incredible machine flight S-67 did normal helicopter moves also looped rolled flew faster 200 mph sole S-67 crashed 1974 Farnborough air show England during low-level roll machine completely destroyed remember seeing S-67 tail-rotor blades Dave Niemans shop 1976 apparently having re trieved half-mile crash Pete Ashford US government decided against S-67 possible US military weapon its interesting note care fully Soviets looked According Czech aviation magazine article written 1974 entitled Another Ml Soviets carefully scrutinized American S-67 impressed new helicopter Mi-24 Hind designed basis technical specifications similar Sikorsky 5-67 Blackhawk attack helicopter am now working plug Blackhawk fuselage hope flying springtime BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 53 Hey US filers much invitation want now remainder report Paul Bowman Needle valve assembly standard OPS needle valve assembly lock nut type design has proven very reliable Vibration caused engine loosens locking nut allowing needle vibrate away its origi nal setting eliminate problem OPS assembly best replaced OS spring-type assembly may glued place using epoxy resin may also used plug redundant hole venturi side OS spring-type assem bly has positive click-by-click action allowing precise mixture adjustment made Fuel pressurization various methods fuel pressurization available 140 Model Aviation Complete Parts & Service both GMP SCHLUTER Heilcopten HELICOPTER HOTLINE 414 722-5025
Edition: Model Aviation - 1985/03
Page Numbers: 52, 138, 140
Radio Control Helicopters Larry Jolly FASCINATING Im people really enjoys model aircraft doesnt matter what type Im fascinated As such Im usually inclined read model magazine cover cover same thing may have noticed page 127 January issue ModelAviation contained upto-theminute FAI World Records noticed six record categories Radio Control Helicopters following what lieve current records published January issue Ive converted metric values system 35 Duration 36 Distance straight line 37 Height 38 Speed 38 Dist closed course 56 Speed closed course 3 hr 35 mm 6sec 557 miles 36747 ft 568 mph 447 miles 449 mph FR Germany Australia USSR FR Germany Australia FR Germany records dont look too tough Did also notice records have USA after Wheres Yankee know-how bet records could captured Ameri can enthusiasts flying basically stock ma chines have get willing Contest Director make sure play rules record sanction AMA well FAI regulations known Sporting Codeand have Before get too far brainstorm make sure record-setting whirlybird fits FAI specifications FM definition Radio-Controlled Helicopter heavier-than-air aeromodel derives its lift horizontal Larrys all-time favorite full-scale Chop perthe Slkorski 5-78 Biackhawk Hes got good history months text propulsion power-driven rotor sys tem rotating about nominally-vertical axis must also fit within following characteristics maximum swept area lifting rotors 300 din2 4650 sq must weigh 1322 pounds takeoff largest engine can use 61 Which records should tackle first As far cn see Altitude record going begging should fairly obvious machines flew last years Nationals capable topping 4000 ft also pretty obvious no standing ground going fly machine 4000 ft viewing naked eye aid full-size helicopter carrying pilot model Contest Director barograph RC Helicopter should able top 7000 ft probably As Duration Distance same Helicopter could used both tasks would probably use 50-size machine maybe Baron Cobra Id use mainly because lightbut importantly could easily lengthen tail boom accommodate longer rotor blades will necessary utilize low-oil fuel better yet spark ignition compression ignitionto realize required engine run think running takeoff will also necessary get airborue maximum fuel load What about Speed Speed records currently held stock Schiuter Su periors believe task others largely governed pilot know fact Superior will fly faster 60mph Back 1979 Tim Jones chased Webra Speedpowered Heliboy over 75 mph machines certainly capable enough rest just up pilot some serious about going after records may helpful form groups attempting records anything matter nothing beats well-organized interested group months photos Speaking wellorganized groups months photos some hand-crafted originals AME group now headed Herbert Sitar will remember AME group Sailplanes Pfeil Dassel After winning F3B World Championships 1979 group drifted out spotlight According Rick Schrameck supplied pictures Sitars became interested Helicopters help some interested Swiss friends have come up quite menag erie up-to-date machines Apparently machines origi Continued Page 138 52 Model Aviation Herbert Sitars fabulous Beii 222 fuss Switzeriand its scratch-built features fiber giass fuseisge rotor biadesi Look closely youii see retracts have shock-struts tali rotor iooks Kavan-style features high-speed blades Rotor flybariess Machine acrobatic itfiles 81 engine RickSchrameck photo ii quartet tinely-cranted original Helicopters belongs members Swiss AME groupthe same ones developed famous Dassel Sailplane few years ago use similar mechanics rotor components Photo Rick Schrameck World Aerobatic Champion L eos Laser Alsuhnm Lending Gear Fean WingAC Spas Whig Arum 1440 sqin Boise Risk Kit Complete Step ky Step leeftuotlom milk Pictures WeIght 16-20 EngIne 2-4 HP 95 19 PLUS Sales~N ROUSH MFG Tough Ut Ply Babe aud Foom Comtroctloo 64 Wlagipas Wing Are 640 Welgkt6to6YIks Baglee 45 604 2 cycle S hr Assembly lieu 89 Jr Stick Outstanding Large Trainer $9995 Dealer Inquiry Invited Manufacturers Quality Kits Send $100 complete catalog Turbo BD-4 Famous Homebuilt Light Plane mitting lots water flow current relatively heavy load other hand pinhole large resistance light load Thus tank battery will empty faster heavy load low resistance large pipe much slower pinhole condition light load As extremes no hole essentially open circuit permits no current flow Its like battery cell sitting shelf nothing connected short circuit such heavy wire placed across terminals charged battery would cause enormous current flow just entire bottom water tank removed once resulting inevitably tremendous flow water Thus amount water flow dependent both depth water overhead tank external condi tions pipe water load Elec trical current similarly dependent available battery voltage load resistance connected battery Putting water tank requires work Consider filling tank bucket time Up ladder Thats work has carry water against pull gravity get tank higher tank work effect work done imparting stored energy water Just simple fact water tank has elevation means water has potential energy Similarly charged model battery has stored energy model battery charged car battery energy ultimately came gasoline fueled auto engine turned alternator charged car battery Work done Like given size water tank Electric model battery big can hold its fill Think about concepts next month well get basic ideas can apply Well take look multimeters work use what readings mean few basics under belt youll have much better understanding things Electricsuch motor/bat tery circuit plane charger works should find hobby enjoyable fact its partly just kind question get incoming mail has prompted 'minilesson' basic electricity Let close acknowledgement some reader response earlier col umn Way back November 1984 issue offered no-rules approach getting simple Electric competition off running As part argument voiced model size power system makeup matter much fact Electrics will perform similarly independent size power-system makeup still maintaln position However same time must candor recognize matter degree reader has pointed out large planes fly better small onesthis based Reynolds number having nothing Electric pow er other power source Thus can argue Giant Scale flies better Peanut Scale context agree Secondly another reader called California point out large glider can seen farther small plane thus flight time can potentially longer former Having just gotten trifocal glasses couldnt agree still say let anything Electric fly early competitions After what pur pose served having book full Electric competition rules no interest ed able participants participant must come first Suppose right now national AMA set Electric competition rules governing size motors batteries whatever Can tell very active Elec tric enthusiast could go fly Elec tric contest Any reader comments questions can sent SASE please author meantime Happy Landings Bob Kopski 2S West End Dr Lans dale PA 19466 writing advertisers mention read about thorn Model Aviation RC Helicopters/Jolly Continued page 52 nal except tail-rotor assembly spection leads believe Kavan Kavan copies also suspect strong Kavan influence throughout de sign note anti-clockwise rotation rotor Also note super-looking flybar less rigid rotorhead now have set Sitars rotor blades epoxy fiberglass over blue foam incredible weigh 150 grams much stronger truer conventional wood blade Rick told machines available completely finished ra dio choice installed Im supposed see Bell 222s firsthand January can bet full report will follow months three-view all-time favorite helicopter Sikorsky S-67 Blackhawk following Military Helicopters World high-speed helicopter gunship developed Sikorsky private venture response Vietnam combat experience Some Blackhawks features based Sikorsky S-66 entry US Armys 1965 competition Advanced Aerial Fire Support System AAFSS well flight experience S-61 F compound helicopter De sign S-67 began August 1969 sole Blackhawk built flew first time exactly year later Although touted highly maneuverable gunship Blackhawk could employed troop carrier well style later Soviet Mi-24 Hind Designed outset gunship Blackhawk all-metal semimon ocoque fuselage narrow cross sec tion pilot copilot/gunner seated tandem forward beneath single Plexiglass canopy As troop carrier main fuselage cabin could divided two levels upper deck seating 15 troops lower section housing fuel ammunition Continued page 140 1 38 Model Aviation Rear 3405 Cleveland Ave SW Canton OH 44707 Phone 216 484-6810 IAS0 S~GREAT LAKES 4gj RC HELICOPTERS 321 Koiwinac Street ha WI 54952 722-5025 DIGITAL HELI-TACH now possible set rotor rpm factory specs safety problems currently associated task new tachometer attaches directly helicopter rotor rpm indicated easyto-read liquid crystal display hover Lightweight durable 3A oz comes ready use batteries instructions LIST PRICE6895 INTRODUCTORY PRICE .. 5895 info product send SASE HA VING PROBLEMS GREAT LAKES FUSELAGE KITS 1 HUGHES 500 KALT 20/MINI-BOY Fiberglass13895 2 JET RANGER KALT 30/MINI-BOY Fiberglass13895 3 JET RANGER GMP CRICKET Plastic 5895 4 HUGHES 500 GMP CRICKET PlasticS 6895 Tp COWEYITO MO 0661H COIWRtWOE PRO w/auto3643 0561H CODRA OS FSRH CRICKET1WII OS28FSRH 419 5143 umrnaz CElL OS6IFSRH OM 3U401 SUPER iWNI-DOT autorotation OS45FSRH SW95 CALL FOR HELP! PRICES GOOD THROUGH MARCH 31 1985 s~tvicm OFFERED custom Building Set Up Flight Inatniction Club Oroup Demonstrations Send $200 catalog INFO $0425 add $350 $264100 add $450 $101 over add $600 UPS COD Blue Label extra Personal Checks will held 30 days VISA Mastercard Minii wisconsin residents add 5% sales tax tail configuration consisted sweptback vertical fin extended below fuselage upper section fin housed anti-torque rotor five-blad ed rotor being fitted left side horizontal stabilizer could set vertical position hovering flight also provided main landing gear retracted fuselage fixed tail wheel vertical fin Stub wings easily detached fitted help off-load rotor during high-speed flight gunship role Blackhawk used wings carry missiles rockets four stations plus wing-end stations Sidewinder airtoair missiles Two 1500 hp General Electric turboshaft engines fitted above low-profile fuselage powered five-bladed main ro tor well anti-torque rotor aircrafts dynamic components modi fied S-61 R helicopter Wingspan 27 feet 4 inches Typical armament loads 16 TOW antitank missiles eight 19-round 275inch rocket pods plus Sidewinders An under-fuselage turret essentially 3600 field fire could fitted 20mm 30mm cannon multi-barrel 20mm cannon 40mm grenade launch er Without external ordnance troops up four tons cargo could carried sling Blackhawk civil N67 1 SA flight tested 1970 1974 its original configuration helicopter reached record speed 216844 mph three-kilometer course December 1970 laterthat month reached 220885 mph 15/25-kilometer course Sikorsky received Army funding modify tail configuration ducted-fan system Flight testing mode began 1974 speeds 230 mph achieved dive aircraft reconfigured its original tail later year crashed September 1974 addition its payload versatility Blackhawk demonstrat ed very high degree maneuverability remember first time saw some film footage incredible machine flight S-67 did normal helicopter moves also looped rolled flew faster 200 mph sole S-67 crashed 1974 Farnborough air show England during low-level roll machine completely destroyed remember seeing S-67 tail-rotor blades Dave Niemans shop 1976 apparently having re trieved half-mile crash Pete Ashford US government decided against S-67 possible US military weapon its interesting note care fully Soviets looked According Czech aviation magazine article written 1974 entitled Another Ml Soviets carefully scrutinized American S-67 impressed new helicopter Mi-24 Hind designed basis technical specifications similar Sikorsky 5-67 Blackhawk attack helicopter am now working plug Blackhawk fuselage hope flying springtime BCNU Larry Jolly 5501 W Como Santa Ana CA 92703 RC Pylon Racing/Hager Continued page 53 Hey US filers much invitation want now remainder report Paul Bowman Needle valve assembly standard OPS needle valve assembly lock nut type design has proven very reliable Vibration caused engine loosens locking nut allowing needle vibrate away its origi nal setting eliminate problem OPS assembly best replaced OS spring-type assembly may glued place using epoxy resin may also used plug redundant hole venturi side OS spring-type assem bly has positive click-by-click action allowing precise mixture adjustment made Fuel pressurization various methods fuel pressurization available 140 Model Aviation Complete Parts & Service both GMP SCHLUTER Heilcopten HELICOPTER HOTLINE 414 722-5025
