HELICOPTERS Dave Chesney IMPROVING flight performance Kavan Jet Ranger will subject month Ray Hostetler has won several contests over past years flying helicopters us have read Rays articles inRCM have likely concluded Ray considers Kavan JR excellent machine well worth effort construction set-up like us Ray also looks ways improve helicop ters flight performance shares ones improvement secrets us following article Swash plate control systems collective pitch helicopters have always necessary pain swash plate control system designed specifically Jet Ranger although could easily used other models features four point swash plate tie down push-pull front/rear left/right cyclic system also eliminates dippity-do JR fast forward flight provides extremely positive control allows up 17 mm swash plate throw full cyclic control either full high full low collective pitch Don Chapman has written numerous Hover columns RCM delivered report have tried different swash plate control systems Jet Ranger doubt better anything else Ive seen Its simple reliable very effective pleased Dons findings must say hovering JR will feel little difference between system stock set up However flying around have experienced need better set up presently building would highly recommend stick set-up right start Since system very simple mechanically easy build install wed like touch upon few points construction Start basic servo plate shown Figure 1 already cut stock easy add rear portion butting piece ply stock piece laying another piece ply over seam between two servos servo holes critical fore-aft should keep close possible toward main shaft location see photos almost too far back shorter distance shorter collective rod can shorter means stronger less flexing holes should spaced apart usual indicated JR plan Referring Figure 1 front servo support left right/left cyclic 22 mm high can build both same con trol rods will rub built right fore/aft cyclic 16 mm high would recommend 1820 mm over heart system what call hinge plate Use full size template provided Figure 4 cut one-eighth inch thick aluminum plate correct proportions use plywood Plywood flexes too much suitable plate holds hinges form rigid unit After cutting plate out drill holes indicated Cut grey hinges respective widths Slip hearing shaft through two hinges side plate shaft keeps hinges line Hot Stuff aluminum drill through grey hinges using pre-drilled plate guide Repeat other side install screws nuts vary position tension slightly assure shaft rides smoothly through bearings Chamfer aluminum plate middle provide suitable bellcrank clearance see Figures 3 4 Using standard pitch angle lever kit cut off sliding ball starts Take other slidingball pitch level cut itoff likewise Sand portions will soldered together Continued page 104 37mm 16mm F--I 7mm FORWARD 0% 15mm r L1 L ,o oo 0 i5mmH 19mm 37mm Figure 4 new hinge plate fullsize May 1980 31 Dave presents Ray Hostetlers moagilcatlon ravan Jel nrnr Pictures may worth 1 OOOwords butthese need detailed explanations thearticle Fig 1 upper left shows bare modified servo tray plastic angle bearings installed Fig 2 upper right shows completed modified assemblybut note tray has turned endfor end Fig 3 above gives close look hinge plate hinges bellcranks chamfer STRIP AILERON BALL LINK LINKAGE HOOK-UP Fully adjustable 1 6 Pc aileron hook-up complete shown No play no binding super precision Eliminates differential throw Safe Should beadjustable used plane utilizing strip ailerons No186$295 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon bail link Easily adjustable Only 85C SWITCH T DUAL TAKE-OFF BALL LINK 5-Piece set No 183 includes 2-way nylon link 2 threaded couplers 1 steel ball pin washer peening assembly securely Onto servo arm fast equal trim adjustments just snap-off nylon link twist desired direction snap back EASY Also great rudder nosewheel elevator-brake hook-ups Only lest fastest easiest way mount battery switch complete switch mounting set enables install battery switch minutes anywhere fuselage drilling 3/16 hole! Excellent use planes helicopters boats cars Designed fit wall thickness up 3/8 Cat No 203 DUBRO PRODUCTS RPORATED 480 Bonner Road Wauconda Illinois 60084 USA itch scratch-build have never done thing kits good plan project can give valuable experience finding working materials rawer form usual kit especially true big birds lot useable materials havent found way kits yet reliable plan flightproven design can concentrate developing construction techniques skills take next step own scratch-built model youll better able concentrate producing flyable design Quarter Scale VTOL got letter back Bill Effinger telling working plans several big birds mentioned Monocoupe 90A three unspecified WWI types Ill pass info get really intriguing thing planned VIOL Harrier using two ducted fan units Ive asked Bill share details pictures us product develops Numero Uno just finishing up months column got first letter reader first column March issue Jim Olsson West Melbourne Florida wrote get some information about 16 ci Homelite engine Im putting F9C-2 Sparrowhawk Jim has Nosen J3 flying large bore glow engine feels needs little power Hes looking something bit smaller Quadra has several questions about Homelite convert know monster man has almost exact set-up Jim consideringa Balsa USA Cub 16 Homelite time read Jim should have answers looks like info would general interest Ill include future column trust Jims letter just first Getting passing info what column about Please what Jim did include SASE want direct reply Ill best get answers problems Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Helicopters/Chesney continued page 37 roughly position wrap copper wire Slide assembly onto hinge plate shafts place get exact spacing Now remove pitch lever before soldering Melted hinges little value See right side Figure 3 better grasp step position plastic angle bearings wooden plate draw center line down plate Referring Figure 1 start front main shaft itself go 24 mm toward front servo mounts mm left locates screw hole nearest main shaft innermost angle bearing next hole 18 mm over 23 mm locates third hole 14 mm positions fourth Drill remainder holes install plastic angle bearings Again must have shaft place tighten screws everything works smoothly takes few minutes must right Due geometry system collective pitch backwards compared standard JR hookup pull collective instead pushing reverses tail rotor mixing correct go back tail rotor turn around tail rotor hubs ball links should snap trailing edge tail rotor blades leading edge customary Now tail rotor servo works backwards should 104 Model Aviation r DU-BRO BALL LINKS 1A6 THREADEIi BALL LINK 4 piece Jthreaded ball link set Pfits perfectly servo arm holes bellcranks nylon horns throt tIe arms Strong easy hook up No 190 Just bolt onl 85 reverse too After steps will line again no adverse effects except its back wards stock point system can assembled Make pushrods paying special attention Y pushrod connects two pitch belicranks together Shape shown Figure 2 check smooth operation ranges collective pitch Put extra ball back swash plate can snap antirotation link original arrangement can used although presently using pin slot combination similar found Alouette few closing notesthe screws holding plastic angle bearings tend hit aluminum bracket other side servo plate pushed through Take Moto-Tool grind away aluminum nuts can installed easily need four angle bearings high style Two provided kit Orderpart #3503 other two front pushrod runs straight through lower front aluminum bracket Roughly pencil area rod runs cut portion out sufficient clearance rod pass through swash plate bend IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $1950O Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- $24995* *inCludes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 ea SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVER ITE 15 rolls - 20% off 24-Hour Service $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 rods bellcranks swash plate Everything works perfectly smooth straight rods straight strong latter step illustrated article hover hinge plate should parallel wooden servo plate Also bellcranks reinforced style should used top bellcranks lead servo arms should shortened 4 mm see Figure 3 foregoing material will enable alleviate problems might have swash plate control systems Kavan Jet Ranger welcome comments questions might have address Ray Hostetler Box 136 Kidron OH 44636 Phone 2 16-8578393 first RC Helicopter Olympics will held Vista CA June 681980 Olympic theme will held throughout contest gold silver bronze medals awarded manufacturers will donate products awards also expected include kits radios etc Compe tition will grouped three classes Nov ice Intermediate Expert Novice fliers can look forward such tasks balloon busting pylon racing limbo others never having leave hovering mode Intermediate Expert filers will put out fires rescue people burning buildings participate drag races looping lim bos will also separate free-style events class separate awards given winners continuous clinic will available modeler has questions about set-up flying RC helicopter 1980 RC Helicopter Olympics de signed around Schluter Helicopter Party concept pilots can have fun instead entering grueling contest-like competition past Entertainment planned Saturday June 6 form banquet dinner guest speaker telling about history RC helicopter Films other enjoyable activities also planned Sponsors event North County Blade Busters Contest Director Bob Robeson 173 Sunset Drive No 2 Vista CA 92083 Telephone enquiries handled Charlie Onstott 714 744-9605 Thats month Dont forget pre flight checks Fly safely Dave Chesney Rt 9 Box 621A Greensboro NC 27409 Shell Game/Kragness continued page 35 curve fuselage other words greater curvature closer bulkheads 3 side view drawing must sharply drawn drawing must translucent paper accurately duplicated right left hand sure make fuselage right left half shell 4 Use bulkheads feel desirable much regard weight considerable amount weight can deleted bulkheads cut away narrow half rings just prior final joining two halfshells non-major bulkheads cut-away may extend skin joining strips 5 will find considerable accuracy desirable exact location bulkheads keel strips squareness drawing work board holding keel strips solidly work board surface 6 best gluing clamp final joining strip rubber wound spirally around two halves lightest tension will bring good contact good idea make completely closed shells make cut outs cockpits etc later 7 Some practice experimenting will allow improve technique curious e HS-l 26 shell shown weighs 17 ounces 18 inches long primarily 1/32 skin over 1/16 bulkheads 14 X 1/16 side stringer strip Planked Shells shapes yield best planking Most what said about concen trated loads also applies planked shells As example will discuss Lockheed Vega Orion Sirius Altair etc photos show 1/12-scale model constructed 1/16 planking fuselage geometry totally symmetrical divided cut along horizontal center plane both top bottom identical cut vertical plane right left half shells identical Lockheed Vega fuselage wood molding using two identical shells laminated glue pressed concrete mold 106 Model Aviation REALISMSCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5Ot FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 0 92069 JLLA iI2LINc
Edition: Model Aviation - 1980/05
Page Numbers: 31, 104, 106
HELICOPTERS Dave Chesney IMPROVING flight performance Kavan Jet Ranger will subject month Ray Hostetler has won several contests over past years flying helicopters us have read Rays articles inRCM have likely concluded Ray considers Kavan JR excellent machine well worth effort construction set-up like us Ray also looks ways improve helicop ters flight performance shares ones improvement secrets us following article Swash plate control systems collective pitch helicopters have always necessary pain swash plate control system designed specifically Jet Ranger although could easily used other models features four point swash plate tie down push-pull front/rear left/right cyclic system also eliminates dippity-do JR fast forward flight provides extremely positive control allows up 17 mm swash plate throw full cyclic control either full high full low collective pitch Don Chapman has written numerous Hover columns RCM delivered report have tried different swash plate control systems Jet Ranger doubt better anything else Ive seen Its simple reliable very effective pleased Dons findings must say hovering JR will feel little difference between system stock set up However flying around have experienced need better set up presently building would highly recommend stick set-up right start Since system very simple mechanically easy build install wed like touch upon few points construction Start basic servo plate shown Figure 1 already cut stock easy add rear portion butting piece ply stock piece laying another piece ply over seam between two servos servo holes critical fore-aft should keep close possible toward main shaft location see photos almost too far back shorter distance shorter collective rod can shorter means stronger less flexing holes should spaced apart usual indicated JR plan Referring Figure 1 front servo support left right/left cyclic 22 mm high can build both same con trol rods will rub built right fore/aft cyclic 16 mm high would recommend 1820 mm over heart system what call hinge plate Use full size template provided Figure 4 cut one-eighth inch thick aluminum plate correct proportions use plywood Plywood flexes too much suitable plate holds hinges form rigid unit After cutting plate out drill holes indicated Cut grey hinges respective widths Slip hearing shaft through two hinges side plate shaft keeps hinges line Hot Stuff aluminum drill through grey hinges using pre-drilled plate guide Repeat other side install screws nuts vary position tension slightly assure shaft rides smoothly through bearings Chamfer aluminum plate middle provide suitable bellcrank clearance see Figures 3 4 Using standard pitch angle lever kit cut off sliding ball starts Take other slidingball pitch level cut itoff likewise Sand portions will soldered together Continued page 104 37mm 16mm F--I 7mm FORWARD 0% 15mm r L1 L ,o oo 0 i5mmH 19mm 37mm Figure 4 new hinge plate fullsize May 1980 31 Dave presents Ray Hostetlers moagilcatlon ravan Jel nrnr Pictures may worth 1 OOOwords butthese need detailed explanations thearticle Fig 1 upper left shows bare modified servo tray plastic angle bearings installed Fig 2 upper right shows completed modified assemblybut note tray has turned endfor end Fig 3 above gives close look hinge plate hinges bellcranks chamfer STRIP AILERON BALL LINK LINKAGE HOOK-UP Fully adjustable 1 6 Pc aileron hook-up complete shown No play no binding super precision Eliminates differential throw Safe Should beadjustable used plane utilizing strip ailerons No186$295 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon bail link Easily adjustable Only 85C SWITCH T DUAL TAKE-OFF BALL LINK 5-Piece set No 183 includes 2-way nylon link 2 threaded couplers 1 steel ball pin washer peening assembly securely Onto servo arm fast equal trim adjustments just snap-off nylon link twist desired direction snap back EASY Also great rudder nosewheel elevator-brake hook-ups Only lest fastest easiest way mount battery switch complete switch mounting set enables install battery switch minutes anywhere fuselage drilling 3/16 hole! Excellent use planes helicopters boats cars Designed fit wall thickness up 3/8 Cat No 203 DUBRO PRODUCTS RPORATED 480 Bonner Road Wauconda Illinois 60084 USA itch scratch-build have never done thing kits good plan project can give valuable experience finding working materials rawer form usual kit especially true big birds lot useable materials havent found way kits yet reliable plan flightproven design can concentrate developing construction techniques skills take next step own scratch-built model youll better able concentrate producing flyable design Quarter Scale VTOL got letter back Bill Effinger telling working plans several big birds mentioned Monocoupe 90A three unspecified WWI types Ill pass info get really intriguing thing planned VIOL Harrier using two ducted fan units Ive asked Bill share details pictures us product develops Numero Uno just finishing up months column got first letter reader first column March issue Jim Olsson West Melbourne Florida wrote get some information about 16 ci Homelite engine Im putting F9C-2 Sparrowhawk Jim has Nosen J3 flying large bore glow engine feels needs little power Hes looking something bit smaller Quadra has several questions about Homelite convert know monster man has almost exact set-up Jim consideringa Balsa USA Cub 16 Homelite time read Jim should have answers looks like info would general interest Ill include future column trust Jims letter just first Getting passing info what column about Please what Jim did include SASE want direct reply Ill best get answers problems Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Helicopters/Chesney continued page 37 roughly position wrap copper wire Slide assembly onto hinge plate shafts place get exact spacing Now remove pitch lever before soldering Melted hinges little value See right side Figure 3 better grasp step position plastic angle bearings wooden plate draw center line down plate Referring Figure 1 start front main shaft itself go 24 mm toward front servo mounts mm left locates screw hole nearest main shaft innermost angle bearing next hole 18 mm over 23 mm locates third hole 14 mm positions fourth Drill remainder holes install plastic angle bearings Again must have shaft place tighten screws everything works smoothly takes few minutes must right Due geometry system collective pitch backwards compared standard JR hookup pull collective instead pushing reverses tail rotor mixing correct go back tail rotor turn around tail rotor hubs ball links should snap trailing edge tail rotor blades leading edge customary Now tail rotor servo works backwards should 104 Model Aviation r DU-BRO BALL LINKS 1A6 THREADEIi BALL LINK 4 piece Jthreaded ball link set Pfits perfectly servo arm holes bellcranks nylon horns throt tIe arms Strong easy hook up No 190 Just bolt onl 85 reverse too After steps will line again no adverse effects except its back wards stock point system can assembled Make pushrods paying special attention Y pushrod connects two pitch belicranks together Shape shown Figure 2 check smooth operation ranges collective pitch Put extra ball back swash plate can snap antirotation link original arrangement can used although presently using pin slot combination similar found Alouette few closing notesthe screws holding plastic angle bearings tend hit aluminum bracket other side servo plate pushed through Take Moto-Tool grind away aluminum nuts can installed easily need four angle bearings high style Two provided kit Orderpart #3503 other two front pushrod runs straight through lower front aluminum bracket Roughly pencil area rod runs cut portion out sufficient clearance rod pass through swash plate bend IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $1950O Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- $24995* *inCludes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 ea SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVER ITE 15 rolls - 20% off 24-Hour Service $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 rods bellcranks swash plate Everything works perfectly smooth straight rods straight strong latter step illustrated article hover hinge plate should parallel wooden servo plate Also bellcranks reinforced style should used top bellcranks lead servo arms should shortened 4 mm see Figure 3 foregoing material will enable alleviate problems might have swash plate control systems Kavan Jet Ranger welcome comments questions might have address Ray Hostetler Box 136 Kidron OH 44636 Phone 2 16-8578393 first RC Helicopter Olympics will held Vista CA June 681980 Olympic theme will held throughout contest gold silver bronze medals awarded manufacturers will donate products awards also expected include kits radios etc Compe tition will grouped three classes Nov ice Intermediate Expert Novice fliers can look forward such tasks balloon busting pylon racing limbo others never having leave hovering mode Intermediate Expert filers will put out fires rescue people burning buildings participate drag races looping lim bos will also separate free-style events class separate awards given winners continuous clinic will available modeler has questions about set-up flying RC helicopter 1980 RC Helicopter Olympics de signed around Schluter Helicopter Party concept pilots can have fun instead entering grueling contest-like competition past Entertainment planned Saturday June 6 form banquet dinner guest speaker telling about history RC helicopter Films other enjoyable activities also planned Sponsors event North County Blade Busters Contest Director Bob Robeson 173 Sunset Drive No 2 Vista CA 92083 Telephone enquiries handled Charlie Onstott 714 744-9605 Thats month Dont forget pre flight checks Fly safely Dave Chesney Rt 9 Box 621A Greensboro NC 27409 Shell Game/Kragness continued page 35 curve fuselage other words greater curvature closer bulkheads 3 side view drawing must sharply drawn drawing must translucent paper accurately duplicated right left hand sure make fuselage right left half shell 4 Use bulkheads feel desirable much regard weight considerable amount weight can deleted bulkheads cut away narrow half rings just prior final joining two halfshells non-major bulkheads cut-away may extend skin joining strips 5 will find considerable accuracy desirable exact location bulkheads keel strips squareness drawing work board holding keel strips solidly work board surface 6 best gluing clamp final joining strip rubber wound spirally around two halves lightest tension will bring good contact good idea make completely closed shells make cut outs cockpits etc later 7 Some practice experimenting will allow improve technique curious e HS-l 26 shell shown weighs 17 ounces 18 inches long primarily 1/32 skin over 1/16 bulkheads 14 X 1/16 side stringer strip Planked Shells shapes yield best planking Most what said about concen trated loads also applies planked shells As example will discuss Lockheed Vega Orion Sirius Altair etc photos show 1/12-scale model constructed 1/16 planking fuselage geometry totally symmetrical divided cut along horizontal center plane both top bottom identical cut vertical plane right left half shells identical Lockheed Vega fuselage wood molding using two identical shells laminated glue pressed concrete mold 106 Model Aviation REALISMSCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5Ot FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 0 92069 JLLA iI2LINc
Edition: Model Aviation - 1980/05
Page Numbers: 31, 104, 106
HELICOPTERS Dave Chesney IMPROVING flight performance Kavan Jet Ranger will subject month Ray Hostetler has won several contests over past years flying helicopters us have read Rays articles inRCM have likely concluded Ray considers Kavan JR excellent machine well worth effort construction set-up like us Ray also looks ways improve helicop ters flight performance shares ones improvement secrets us following article Swash plate control systems collective pitch helicopters have always necessary pain swash plate control system designed specifically Jet Ranger although could easily used other models features four point swash plate tie down push-pull front/rear left/right cyclic system also eliminates dippity-do JR fast forward flight provides extremely positive control allows up 17 mm swash plate throw full cyclic control either full high full low collective pitch Don Chapman has written numerous Hover columns RCM delivered report have tried different swash plate control systems Jet Ranger doubt better anything else Ive seen Its simple reliable very effective pleased Dons findings must say hovering JR will feel little difference between system stock set up However flying around have experienced need better set up presently building would highly recommend stick set-up right start Since system very simple mechanically easy build install wed like touch upon few points construction Start basic servo plate shown Figure 1 already cut stock easy add rear portion butting piece ply stock piece laying another piece ply over seam between two servos servo holes critical fore-aft should keep close possible toward main shaft location see photos almost too far back shorter distance shorter collective rod can shorter means stronger less flexing holes should spaced apart usual indicated JR plan Referring Figure 1 front servo support left right/left cyclic 22 mm high can build both same con trol rods will rub built right fore/aft cyclic 16 mm high would recommend 1820 mm over heart system what call hinge plate Use full size template provided Figure 4 cut one-eighth inch thick aluminum plate correct proportions use plywood Plywood flexes too much suitable plate holds hinges form rigid unit After cutting plate out drill holes indicated Cut grey hinges respective widths Slip hearing shaft through two hinges side plate shaft keeps hinges line Hot Stuff aluminum drill through grey hinges using pre-drilled plate guide Repeat other side install screws nuts vary position tension slightly assure shaft rides smoothly through bearings Chamfer aluminum plate middle provide suitable bellcrank clearance see Figures 3 4 Using standard pitch angle lever kit cut off sliding ball starts Take other slidingball pitch level cut itoff likewise Sand portions will soldered together Continued page 104 37mm 16mm F--I 7mm FORWARD 0% 15mm r L1 L ,o oo 0 i5mmH 19mm 37mm Figure 4 new hinge plate fullsize May 1980 31 Dave presents Ray Hostetlers moagilcatlon ravan Jel nrnr Pictures may worth 1 OOOwords butthese need detailed explanations thearticle Fig 1 upper left shows bare modified servo tray plastic angle bearings installed Fig 2 upper right shows completed modified assemblybut note tray has turned endfor end Fig 3 above gives close look hinge plate hinges bellcranks chamfer STRIP AILERON BALL LINK LINKAGE HOOK-UP Fully adjustable 1 6 Pc aileron hook-up complete shown No play no binding super precision Eliminates differential throw Safe Should beadjustable used plane utilizing strip ailerons No186$295 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon bail link Easily adjustable Only 85C SWITCH T DUAL TAKE-OFF BALL LINK 5-Piece set No 183 includes 2-way nylon link 2 threaded couplers 1 steel ball pin washer peening assembly securely Onto servo arm fast equal trim adjustments just snap-off nylon link twist desired direction snap back EASY Also great rudder nosewheel elevator-brake hook-ups Only lest fastest easiest way mount battery switch complete switch mounting set enables install battery switch minutes anywhere fuselage drilling 3/16 hole! Excellent use planes helicopters boats cars Designed fit wall thickness up 3/8 Cat No 203 DUBRO PRODUCTS RPORATED 480 Bonner Road Wauconda Illinois 60084 USA itch scratch-build have never done thing kits good plan project can give valuable experience finding working materials rawer form usual kit especially true big birds lot useable materials havent found way kits yet reliable plan flightproven design can concentrate developing construction techniques skills take next step own scratch-built model youll better able concentrate producing flyable design Quarter Scale VTOL got letter back Bill Effinger telling working plans several big birds mentioned Monocoupe 90A three unspecified WWI types Ill pass info get really intriguing thing planned VIOL Harrier using two ducted fan units Ive asked Bill share details pictures us product develops Numero Uno just finishing up months column got first letter reader first column March issue Jim Olsson West Melbourne Florida wrote get some information about 16 ci Homelite engine Im putting F9C-2 Sparrowhawk Jim has Nosen J3 flying large bore glow engine feels needs little power Hes looking something bit smaller Quadra has several questions about Homelite convert know monster man has almost exact set-up Jim consideringa Balsa USA Cub 16 Homelite time read Jim should have answers looks like info would general interest Ill include future column trust Jims letter just first Getting passing info what column about Please what Jim did include SASE want direct reply Ill best get answers problems Bob Beckman 8248 Holly Grove Court Manassas VA 22110 RC Helicopters/Chesney continued page 37 roughly position wrap copper wire Slide assembly onto hinge plate shafts place get exact spacing Now remove pitch lever before soldering Melted hinges little value See right side Figure 3 better grasp step position plastic angle bearings wooden plate draw center line down plate Referring Figure 1 start front main shaft itself go 24 mm toward front servo mounts mm left locates screw hole nearest main shaft innermost angle bearing next hole 18 mm over 23 mm locates third hole 14 mm positions fourth Drill remainder holes install plastic angle bearings Again must have shaft place tighten screws everything works smoothly takes few minutes must right Due geometry system collective pitch backwards compared standard JR hookup pull collective instead pushing reverses tail rotor mixing correct go back tail rotor turn around tail rotor hubs ball links should snap trailing edge tail rotor blades leading edge customary Now tail rotor servo works backwards should 104 Model Aviation r DU-BRO BALL LINKS 1A6 THREADEIi BALL LINK 4 piece Jthreaded ball link set Pfits perfectly servo arm holes bellcranks nylon horns throt tIe arms Strong easy hook up No 190 Just bolt onl 85 reverse too After steps will line again no adverse effects except its back wards stock point system can assembled Make pushrods paying special attention Y pushrod connects two pitch belicranks together Shape shown Figure 2 check smooth operation ranges collective pitch Put extra ball back swash plate can snap antirotation link original arrangement can used although presently using pin slot combination similar found Alouette few closing notesthe screws holding plastic angle bearings tend hit aluminum bracket other side servo plate pushed through Take Moto-Tool grind away aluminum nuts can installed easily need four angle bearings high style Two provided kit Orderpart #3503 other two front pushrod runs straight through lower front aluminum bracket Roughly pencil area rod runs cut portion out sufficient clearance rod pass through swash plate bend IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $1950O Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- $24995* *inCludes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 ea SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVER ITE 15 rolls - 20% off 24-Hour Service $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 rods bellcranks swash plate Everything works perfectly smooth straight rods straight strong latter step illustrated article hover hinge plate should parallel wooden servo plate Also bellcranks reinforced style should used top bellcranks lead servo arms should shortened 4 mm see Figure 3 foregoing material will enable alleviate problems might have swash plate control systems Kavan Jet Ranger welcome comments questions might have address Ray Hostetler Box 136 Kidron OH 44636 Phone 2 16-8578393 first RC Helicopter Olympics will held Vista CA June 681980 Olympic theme will held throughout contest gold silver bronze medals awarded manufacturers will donate products awards also expected include kits radios etc Compe tition will grouped three classes Nov ice Intermediate Expert Novice fliers can look forward such tasks balloon busting pylon racing limbo others never having leave hovering mode Intermediate Expert filers will put out fires rescue people burning buildings participate drag races looping lim bos will also separate free-style events class separate awards given winners continuous clinic will available modeler has questions about set-up flying RC helicopter 1980 RC Helicopter Olympics de signed around Schluter Helicopter Party concept pilots can have fun instead entering grueling contest-like competition past Entertainment planned Saturday June 6 form banquet dinner guest speaker telling about history RC helicopter Films other enjoyable activities also planned Sponsors event North County Blade Busters Contest Director Bob Robeson 173 Sunset Drive No 2 Vista CA 92083 Telephone enquiries handled Charlie Onstott 714 744-9605 Thats month Dont forget pre flight checks Fly safely Dave Chesney Rt 9 Box 621A Greensboro NC 27409 Shell Game/Kragness continued page 35 curve fuselage other words greater curvature closer bulkheads 3 side view drawing must sharply drawn drawing must translucent paper accurately duplicated right left hand sure make fuselage right left half shell 4 Use bulkheads feel desirable much regard weight considerable amount weight can deleted bulkheads cut away narrow half rings just prior final joining two halfshells non-major bulkheads cut-away may extend skin joining strips 5 will find considerable accuracy desirable exact location bulkheads keel strips squareness drawing work board holding keel strips solidly work board surface 6 best gluing clamp final joining strip rubber wound spirally around two halves lightest tension will bring good contact good idea make completely closed shells make cut outs cockpits etc later 7 Some practice experimenting will allow improve technique curious e HS-l 26 shell shown weighs 17 ounces 18 inches long primarily 1/32 skin over 1/16 bulkheads 14 X 1/16 side stringer strip Planked Shells shapes yield best planking Most what said about concen trated loads also applies planked shells As example will discuss Lockheed Vega Orion Sirius Altair etc photos show 1/12-scale model constructed 1/16 planking fuselage geometry totally symmetrical divided cut along horizontal center plane both top bottom identical cut vertical plane right left half shells identical Lockheed Vega fuselage wood molding using two identical shells laminated glue pressed concrete mold 106 Model Aviation REALISMSCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5Ot FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 0 92069 JLLA iI2LINc