Radio Control Helicopters Larry Jolly AS WRITE article still confined indoors because severe winter weather though its too cold venture outside flying can still enjoy Helicopter time year probably working new model repairing regular birds dont get spend much time bench Id like enjoy building get great satisfaction have successfully removed run-out starting shaft worked gear train succeeded getting set just right Any way what getting though may flying now excellent time going through machines will ready fly spring arrives particular should check radio gear worn pots output arms broken wires bad airborne battery packs Also look cracked worn-out ball links course lookout loose screws nuts reader writes Occasionally hear some out space permits publish letter idea month am publishing photo letter Jack Schultz Plymouth WI Jack writes thought might interested project Ive working said would like hear people working tandem RC Helicopters Well Ive working its correctly co-axial tandem ship enclosed photo shows basic layout factors determine layout Helicopter no exception Basically twinrotor coaxial contra-rotating RC Helicop ter can vary pitch either set blades alone both together Combining functions yields col lective cyclic differential collective Ugly Soviet Ka-25 military chopper bears NATO code-name Hormone-A twinrotor coaxial contra-rotating type used variety naval missions type usually carries center-fin pod Note emergency flotation-bag rings surrounding landing wheels control Because layout no tail rotor needed yet high-speed forward flight some sort stability rudder will have added model titled Odonata Latin word dragonfly has 36-in-diaxneter rotors 101 reduction gearing powered 40 engine model has flown successfully needs time powerful engine clutch also needs refinement de signed machined much machine except engine rotor heads entire frame gear assembly clutch rotor shaft configuration custom ma chined top rotor system partial Bell Hiller affects entire craft stabilize very well though rotor heads totally rigid except lead/lag Except power requirements rela tively easy fix have pleased Since winter near work near future will mechanics rather flight tests flight control system comlplicated has inci dentally can test different configura tions see effects production ship could much simpler would appreciate could mention ship let able hear anyone else may working similar model Thank Jack coaxial concept new has used full-size has requirement maximum helicopter placed minimum space good example Soviet Kamov KA-25 anti-submarine heli copter coaxial acceptable layout efficient convention al machine because added transmission drag fact lower rotor operating wash upper rotor Nonetheless Jacks model interesting example RC rotorcraft certainly project worth effort May1985 55 Jack Shultzs original-design coaxial chop per designed machined parts except rotor heads Stock com ponents appear include GMP Cricket canopy Schiuter rotor components Now underpowered 40 engine Jack New products Ive recently oppor has flown lot will soon add rear fin tunity try several new products have Improved stability during forward flight Continued page 152 Look Up sky Its bird Its plane its. Larrys new Sikorsky S-76 Scale chopper Flight photo really model shown gear retracted Closeup R shows original fiberglass fuselage over GMP mechanics Ship weighs 12 lb Larry plans add four-bladed main tail rotors near future Beli-Hiller paddles small almost dont notice 4 THE COMPETITIONS VIEW 'I OF THE WINDSONG I. C, 0 0 N 0 DODGSON DESIGNS 2904 SW CAMANO DRIVE CAMANO ISLAND WA 9825i2J What makes Windsong best plane have deadair lightlift gusting 25 MPH winds thermal contest What makes windsong best plane have x-country race Some say 11to 1 aspect ratio clean solidcore wing no spoiler bays disturb airflow Others say Eppler 214 airfoil combined exclusive full-span camber changing capability including elevator compensated 80 degree flaps reflexible ailerons fact design innovations contribute Windsongs total design concept its unprecedented performance WITH THE WINOSONG THE WHOLE IS TRULY GREATER THAN THE SUM OF ITS PARTS Windsong 19995Camano 15995Pixy 14995 Send 2 stamps catalog VHS video tape too can made readily-avail able materials youll have build some sophisticated electronics make work Please forward questions SASE author Happy Electric Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant Scale/Beckman Continued page 53 dont miss information con tact Lee Taylor 216 Willow Ave Rose ville CA 95678 phone number 916 783-4190 next have information all-time favorite events STARS Scale Rally Olean NY scheduled July 6 7 year another event limited Giant Scale dont see much else flying site hospitality fantastic place might see Giant Scale aircraft IMAA Fun-Fly Festival IMAA bash year set July 18-21 Mobile AL fifth year event note time change August July Like Nats FFF rotating around different loca tions year like idea since gives IMAA members around country chance participate what Im hearing will another great Im putting weight just reading menus picnic ban quet Yes Mortimer Giant Scalers other things besides fly big birds things eat info available Don Godfrey 91 Blackstone Ave Binghamton NY 13903 telephone 607 724-0115 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 54 does make wheel pants last longer Well doesnt shock actually destroys wheel pants eliminated attaching land ing gear General Electrics clear bath tub caulking compound assure get proper shock mount slide wheel pant up landing gear place caulking compound backside landing gear pant gear meet Slide back down line up hole gear pant clean unwant ed caulk away Caution Clean out screw hole could lock up wheels install Now assuming final attach ment ie wheel pants painted use Loc-Tite product secure wheels tighten down Allen wrench four-way wrench Place piece vinyl tape over hole unit complete experience using method has nothing convenience factor No special wrench tighten nut easy replacement easy paint touch-up lower-portion damage easy in-field repair replacement longer life wheel pants Hopefully experience will same See next mouth Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 really impressed some particular Airtronics 94554 heavyduty servo has proved excellent choice use Helicopter servo features coreless motor ball-bearingsupported output shaft good centering great strength Ive found servo particular value using flybarless rotor system Because heavy feed back loads some servos fail short time have putting lot hours set 94554s prototype GMP flybarless system over last nine months am very satisfied After reading above might think 94554 good flybarless machine quite contrary little thing works well under strenuous en vironment theyre better Bell Hiller system Another product found very useful American RCs new Lok N-Start starting system really dont like starting belts have admit starting cones work fine until starter slips off cone either goes through cabin adds burnished look finish Scale ship So what Lok-N-Start Basically unit consists two parts adapter shaft telescopes over starting shaft machine held place setscrews starter-adap ter another shaft screws onto end starter has Torrington clutch other end Starting accom plished inserting starter over adapter squeezing switch Because Torrington one-way clutch starter cannot keep engine ac celerating once have gotten fire Best off no friction necessary except transferred Torrington very clean simple system should have thought years ago works great months photos addition photo Jack Schultzs coaxial scratchbuilt have scratch-built-fuselage 152 ModelAviation Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 55, 152, 153
Radio Control Helicopters Larry Jolly AS WRITE article still confined indoors because severe winter weather though its too cold venture outside flying can still enjoy Helicopter time year probably working new model repairing regular birds dont get spend much time bench Id like enjoy building get great satisfaction have successfully removed run-out starting shaft worked gear train succeeded getting set just right Any way what getting though may flying now excellent time going through machines will ready fly spring arrives particular should check radio gear worn pots output arms broken wires bad airborne battery packs Also look cracked worn-out ball links course lookout loose screws nuts reader writes Occasionally hear some out space permits publish letter idea month am publishing photo letter Jack Schultz Plymouth WI Jack writes thought might interested project Ive working said would like hear people working tandem RC Helicopters Well Ive working its correctly co-axial tandem ship enclosed photo shows basic layout factors determine layout Helicopter no exception Basically twinrotor coaxial contra-rotating RC Helicop ter can vary pitch either set blades alone both together Combining functions yields col lective cyclic differential collective Ugly Soviet Ka-25 military chopper bears NATO code-name Hormone-A twinrotor coaxial contra-rotating type used variety naval missions type usually carries center-fin pod Note emergency flotation-bag rings surrounding landing wheels control Because layout no tail rotor needed yet high-speed forward flight some sort stability rudder will have added model titled Odonata Latin word dragonfly has 36-in-diaxneter rotors 101 reduction gearing powered 40 engine model has flown successfully needs time powerful engine clutch also needs refinement de signed machined much machine except engine rotor heads entire frame gear assembly clutch rotor shaft configuration custom ma chined top rotor system partial Bell Hiller affects entire craft stabilize very well though rotor heads totally rigid except lead/lag Except power requirements rela tively easy fix have pleased Since winter near work near future will mechanics rather flight tests flight control system comlplicated has inci dentally can test different configura tions see effects production ship could much simpler would appreciate could mention ship let able hear anyone else may working similar model Thank Jack coaxial concept new has used full-size has requirement maximum helicopter placed minimum space good example Soviet Kamov KA-25 anti-submarine heli copter coaxial acceptable layout efficient convention al machine because added transmission drag fact lower rotor operating wash upper rotor Nonetheless Jacks model interesting example RC rotorcraft certainly project worth effort May1985 55 Jack Shultzs original-design coaxial chop per designed machined parts except rotor heads Stock com ponents appear include GMP Cricket canopy Schiuter rotor components Now underpowered 40 engine Jack New products Ive recently oppor has flown lot will soon add rear fin tunity try several new products have Improved stability during forward flight Continued page 152 Look Up sky Its bird Its plane its. Larrys new Sikorsky S-76 Scale chopper Flight photo really model shown gear retracted Closeup R shows original fiberglass fuselage over GMP mechanics Ship weighs 12 lb Larry plans add four-bladed main tail rotors near future Beli-Hiller paddles small almost dont notice 4 THE COMPETITIONS VIEW 'I OF THE WINDSONG I. C, 0 0 N 0 DODGSON DESIGNS 2904 SW CAMANO DRIVE CAMANO ISLAND WA 9825i2J What makes Windsong best plane have deadair lightlift gusting 25 MPH winds thermal contest What makes windsong best plane have x-country race Some say 11to 1 aspect ratio clean solidcore wing no spoiler bays disturb airflow Others say Eppler 214 airfoil combined exclusive full-span camber changing capability including elevator compensated 80 degree flaps reflexible ailerons fact design innovations contribute Windsongs total design concept its unprecedented performance WITH THE WINOSONG THE WHOLE IS TRULY GREATER THAN THE SUM OF ITS PARTS Windsong 19995Camano 15995Pixy 14995 Send 2 stamps catalog VHS video tape too can made readily-avail able materials youll have build some sophisticated electronics make work Please forward questions SASE author Happy Electric Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant Scale/Beckman Continued page 53 dont miss information con tact Lee Taylor 216 Willow Ave Rose ville CA 95678 phone number 916 783-4190 next have information all-time favorite events STARS Scale Rally Olean NY scheduled July 6 7 year another event limited Giant Scale dont see much else flying site hospitality fantastic place might see Giant Scale aircraft IMAA Fun-Fly Festival IMAA bash year set July 18-21 Mobile AL fifth year event note time change August July Like Nats FFF rotating around different loca tions year like idea since gives IMAA members around country chance participate what Im hearing will another great Im putting weight just reading menus picnic ban quet Yes Mortimer Giant Scalers other things besides fly big birds things eat info available Don Godfrey 91 Blackstone Ave Binghamton NY 13903 telephone 607 724-0115 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 54 does make wheel pants last longer Well doesnt shock actually destroys wheel pants eliminated attaching land ing gear General Electrics clear bath tub caulking compound assure get proper shock mount slide wheel pant up landing gear place caulking compound backside landing gear pant gear meet Slide back down line up hole gear pant clean unwant ed caulk away Caution Clean out screw hole could lock up wheels install Now assuming final attach ment ie wheel pants painted use Loc-Tite product secure wheels tighten down Allen wrench four-way wrench Place piece vinyl tape over hole unit complete experience using method has nothing convenience factor No special wrench tighten nut easy replacement easy paint touch-up lower-portion damage easy in-field repair replacement longer life wheel pants Hopefully experience will same See next mouth Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 really impressed some particular Airtronics 94554 heavyduty servo has proved excellent choice use Helicopter servo features coreless motor ball-bearingsupported output shaft good centering great strength Ive found servo particular value using flybarless rotor system Because heavy feed back loads some servos fail short time have putting lot hours set 94554s prototype GMP flybarless system over last nine months am very satisfied After reading above might think 94554 good flybarless machine quite contrary little thing works well under strenuous en vironment theyre better Bell Hiller system Another product found very useful American RCs new Lok N-Start starting system really dont like starting belts have admit starting cones work fine until starter slips off cone either goes through cabin adds burnished look finish Scale ship So what Lok-N-Start Basically unit consists two parts adapter shaft telescopes over starting shaft machine held place setscrews starter-adap ter another shaft screws onto end starter has Torrington clutch other end Starting accom plished inserting starter over adapter squeezing switch Because Torrington one-way clutch starter cannot keep engine ac celerating once have gotten fire Best off no friction necessary except transferred Torrington very clean simple system should have thought years ago works great months photos addition photo Jack Schultzs coaxial scratchbuilt have scratch-built-fuselage 152 ModelAviation Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 55, 152, 153
Radio Control Helicopters Larry Jolly AS WRITE article still confined indoors because severe winter weather though its too cold venture outside flying can still enjoy Helicopter time year probably working new model repairing regular birds dont get spend much time bench Id like enjoy building get great satisfaction have successfully removed run-out starting shaft worked gear train succeeded getting set just right Any way what getting though may flying now excellent time going through machines will ready fly spring arrives particular should check radio gear worn pots output arms broken wires bad airborne battery packs Also look cracked worn-out ball links course lookout loose screws nuts reader writes Occasionally hear some out space permits publish letter idea month am publishing photo letter Jack Schultz Plymouth WI Jack writes thought might interested project Ive working said would like hear people working tandem RC Helicopters Well Ive working its correctly co-axial tandem ship enclosed photo shows basic layout factors determine layout Helicopter no exception Basically twinrotor coaxial contra-rotating RC Helicop ter can vary pitch either set blades alone both together Combining functions yields col lective cyclic differential collective Ugly Soviet Ka-25 military chopper bears NATO code-name Hormone-A twinrotor coaxial contra-rotating type used variety naval missions type usually carries center-fin pod Note emergency flotation-bag rings surrounding landing wheels control Because layout no tail rotor needed yet high-speed forward flight some sort stability rudder will have added model titled Odonata Latin word dragonfly has 36-in-diaxneter rotors 101 reduction gearing powered 40 engine model has flown successfully needs time powerful engine clutch also needs refinement de signed machined much machine except engine rotor heads entire frame gear assembly clutch rotor shaft configuration custom ma chined top rotor system partial Bell Hiller affects entire craft stabilize very well though rotor heads totally rigid except lead/lag Except power requirements rela tively easy fix have pleased Since winter near work near future will mechanics rather flight tests flight control system comlplicated has inci dentally can test different configura tions see effects production ship could much simpler would appreciate could mention ship let able hear anyone else may working similar model Thank Jack coaxial concept new has used full-size has requirement maximum helicopter placed minimum space good example Soviet Kamov KA-25 anti-submarine heli copter coaxial acceptable layout efficient convention al machine because added transmission drag fact lower rotor operating wash upper rotor Nonetheless Jacks model interesting example RC rotorcraft certainly project worth effort May1985 55 Jack Shultzs original-design coaxial chop per designed machined parts except rotor heads Stock com ponents appear include GMP Cricket canopy Schiuter rotor components Now underpowered 40 engine Jack New products Ive recently oppor has flown lot will soon add rear fin tunity try several new products have Improved stability during forward flight Continued page 152 Look Up sky Its bird Its plane its. Larrys new Sikorsky S-76 Scale chopper Flight photo really model shown gear retracted Closeup R shows original fiberglass fuselage over GMP mechanics Ship weighs 12 lb Larry plans add four-bladed main tail rotors near future Beli-Hiller paddles small almost dont notice 4 THE COMPETITIONS VIEW 'I OF THE WINDSONG I. C, 0 0 N 0 DODGSON DESIGNS 2904 SW CAMANO DRIVE CAMANO ISLAND WA 9825i2J What makes Windsong best plane have deadair lightlift gusting 25 MPH winds thermal contest What makes windsong best plane have x-country race Some say 11to 1 aspect ratio clean solidcore wing no spoiler bays disturb airflow Others say Eppler 214 airfoil combined exclusive full-span camber changing capability including elevator compensated 80 degree flaps reflexible ailerons fact design innovations contribute Windsongs total design concept its unprecedented performance WITH THE WINOSONG THE WHOLE IS TRULY GREATER THAN THE SUM OF ITS PARTS Windsong 19995Camano 15995Pixy 14995 Send 2 stamps catalog VHS video tape too can made readily-avail able materials youll have build some sophisticated electronics make work Please forward questions SASE author Happy Electric Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant Scale/Beckman Continued page 53 dont miss information con tact Lee Taylor 216 Willow Ave Rose ville CA 95678 phone number 916 783-4190 next have information all-time favorite events STARS Scale Rally Olean NY scheduled July 6 7 year another event limited Giant Scale dont see much else flying site hospitality fantastic place might see Giant Scale aircraft IMAA Fun-Fly Festival IMAA bash year set July 18-21 Mobile AL fifth year event note time change August July Like Nats FFF rotating around different loca tions year like idea since gives IMAA members around country chance participate what Im hearing will another great Im putting weight just reading menus picnic ban quet Yes Mortimer Giant Scalers other things besides fly big birds things eat info available Don Godfrey 91 Blackstone Ave Binghamton NY 13903 telephone 607 724-0115 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 54 does make wheel pants last longer Well doesnt shock actually destroys wheel pants eliminated attaching land ing gear General Electrics clear bath tub caulking compound assure get proper shock mount slide wheel pant up landing gear place caulking compound backside landing gear pant gear meet Slide back down line up hole gear pant clean unwant ed caulk away Caution Clean out screw hole could lock up wheels install Now assuming final attach ment ie wheel pants painted use Loc-Tite product secure wheels tighten down Allen wrench four-way wrench Place piece vinyl tape over hole unit complete experience using method has nothing convenience factor No special wrench tighten nut easy replacement easy paint touch-up lower-portion damage easy in-field repair replacement longer life wheel pants Hopefully experience will same See next mouth Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 55 really impressed some particular Airtronics 94554 heavyduty servo has proved excellent choice use Helicopter servo features coreless motor ball-bearingsupported output shaft good centering great strength Ive found servo particular value using flybarless rotor system Because heavy feed back loads some servos fail short time have putting lot hours set 94554s prototype GMP flybarless system over last nine months am very satisfied After reading above might think 94554 good flybarless machine quite contrary little thing works well under strenuous en vironment theyre better Bell Hiller system Another product found very useful American RCs new Lok N-Start starting system really dont like starting belts have admit starting cones work fine until starter slips off cone either goes through cabin adds burnished look finish Scale ship So what Lok-N-Start Basically unit consists two parts adapter shaft telescopes over starting shaft machine held place setscrews starter-adap ter another shaft screws onto end starter has Torrington clutch other end Starting accom plished inserting starter over adapter squeezing switch Because Torrington one-way clutch starter cannot keep engine ac celerating once have gotten fire Best off no friction necessary except transferred Torrington very clean simple system should have thought years ago works great months photos addition photo Jack Schultzs coaxial scratchbuilt have scratch-built-fuselage 152 ModelAviation Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F