IN THE November 1978 ModelAviation will find two photos page 45 scale model related part months column referring beautiful scratch-built Japanese Betty bomber constructed Ken Long Whit tier CA championshipcaliber precision scale model re spect saw either last two Nationals will undoubtedly remember its interesting performance flight line among exciting its kind Multi-engined military bombers fight ers have always strong favorites CL Scale eventmuch Free Flight Radio Controldue CL point structure limits imposed typical scale models aerobatic performance confines CL flight circle Kens Betty embodies desirable charac teristics subject good airfoil wing area moments plenty power multitude possible mechanical scale options added dimension Kens model intriguing way uses Continued page 105 LOOKIINO FROM THE BOTTOM OF THE PLANE 3/B ELASTIC BANDS PARACHUTE FOLDED AGAINST DUMMY STORES ARE HELD AGAINST CEILING OF BOMB BAY 90 BELLCRANK RETURN SPRING ettys Better RELEASE Bomb Boy ALINE SCREW EYES ARE SCREWEDBELAST IC AND EPOXIED INTO 1/4 50 BAND BASSWOOD RUNNING ALONG THE INSIDE OF THE BOMB BAY Ken Longs versatile Bomb-Bay System can release different types droppabie stores bombs torpedoes paratroopers Although designed CL Scale Betty bomber basic idea can used RC scale model Notethatthethree spurwiresaredifferent lengths allowing stores released sequence ali time SMOKE SYSTEM USED IN KEN LONGS SHOT DOWN JAPANESE BOMBER BOTTOM OF WINGOUTBOARD ENGINE NACELLE I______________________________________________ IPOWDERI 1COMPARTMENT HINGE \ ~HEEL WELL HATCH FORWARD PLYWOOD DOOR COVERED ON INSIDE WITH 1/8 THICK RUBBER FIBERGLASS ENGINE NACELLE MOUNTING BOLTS / RGLASS NACELLE LPLYWOOD MOUNTING RINGBLIND NUTS ON THE INSIDE WOOD FIRE WALL WITH TANK AND ENGINE MOUNTED TO IT 38 Model Aviation 6 Phillip Perez scaled Heinkel 219 plastic model Lindberg holding Clever engine installation see sketch may just ticket next multi-engined model REVENGER 60-Size Pattern Designed Dick Russ Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81A 8 3/4 lbs Revenge can sweet Revenger. pattern design can win with$1 See nearest hobby shop first full line brochure write Model Merchant P0 Box 3792 Irving TX 75061 Soaring Society San Francisco area proved successful Limited ships 1350 sq surface area entries included expanded Paragon Aquila X Ls some original designs bi winged Olympic II won design award its builder Larry Horacek Bob McGowen expanded Paragon took first place subjects mentioned have leaning towards things bit differ ent lets continue eventor part taskthat long overdue modifica tion suggestion different First clubs contest directors feel beauty grace thermal flight should end punch ground often becomes test structural integrity ones ship Efforts de-emphasis spot landing has seen events round fat spots small round spots long skinny runways large square runways points landing hardly points landings attempts efforts de-emphasize landing some efforts eliminate dork type landing Harris Hill gang Elmira NY have proponents land like real ones creed judges grade landings year annual big bashno pun intended fact judges full-scale fliers neces sarily versed model sailplanes should could land created little solution landing problem arguments generated rules committee meeting LSF tournaments past included sites hard-surfaced areas same contests thought prudence would prevail greased-on landings would order day Didnt happen sharpshooters added protective covering ships some planes banged 100-point spots carrying padding beauty pag eant reject So over years whether runways round square skinny fat whether points values large small landing points margin victory dorkers usually won best solution above has come along result Mid-Ohio Soaring Societys MOSS efforts cure landing syndrome remedy simple youll wonder wasnt thought before Bob Colgroves idea have line about three inches wide drawn ground wouldnt considered precision line guide reference line Somewhere line another line drawn stretched right angles Now point value intersection two lines zero increases along refer ence line whatever rate desire Up point circular landing zone point value tape rectangular runway would serve well above mentioned reference line Bobs system differs order score landing points model must touch down before cross stripe outside circle Points earned model comes rest Granted fields close clipped allow type scoring lot Cosgroves suggestions further state touch down bounce scoring zone no points landing earned course cross intersection landing boundaries before touchdown its no landing score can readily seen dork type landing strategy no value used before landing zone youll either come abrupt stop bounce in either case its zero score Landings type could encourage fields hard-surfaced runways used listening Harris Hill L/D members would probably promote sailplanes wheels sod-farm fliers surely could try landing event Its hard say whether will catch does can bet some 90 100 point scores usually attained some will long time acoming names top ten some regions will change around during season meantime use well worn clicbehappy landings IJan Pn4ss Rt 2 Box 490 Plainfield IL 60544 mechanical flight options tell story takes realism flight step further fact fully understand realism depicted Kens flight plan should look briefly part full-scale Bettys combat history Mitsubishi G4M Type 1 Land Attack Aircraft allied code named Betty saw action Pacific theater World War II Aleutian Islands Austra ha Betty primary weapons Japan gained its initial victories During early stages war identified among feared Japanese offensive combat air craft like infamous Zero fighter legend soon proved part myth Japanese insistance maximum range maneuverability Zero expense protective armor rendered Betty supremely vulnerable air ground fire earliest versions Betty carried 1100 gallons fuel inimense totally unprotected wing tanks earning nicknames Type 1 Lighter Flying Cigar own crews Later versions incorporated add-on attempts armor part Betty always retained notorious inflamabiity special version Betty desig nated G4M2e subject Kens model built limited numbers parent aircraft Ohka allied code named Baka rocket-powered suicide bomb Betty normally approached within 2040 miles target launched Ohka about 200 mph Kamikazee pilot attempted glide about 230 mph within three miles target before igniting rockets plung ing down target speeds excess 600 mph noted vulnerability Betty its slow speed unwieldiness Ohka aboard enabled Allied fighter interception shoot down ill-fated missions soon withdrawn service flight Kens Betty recreates scene starting launching gliding Ohka bomb appearance smoke April 1979 105 CL Scale/Gretz continued page 38 THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 Miami Florida 33180 2657 NE 188th Street Telephone 935-1436 several parachuting crew members signal Bettys demise hands Allies Come didnt really expect him crash did heart Kens replica clever internal bomb bay release mechanism devised Five different kinds droppable stores can released bomb bay duplicating capabilities versatile full-scale Bettys basic ideas behind system give great potential use other scale subjects could easily adapted RC scale model Kens letter describes working details main wire runs parallel fuselage inboard side bomb bay Elastic bands glued epoxy opposite side bomb bay Small eyelets wrapped thread epoxied other end elastic bands bands stretched across bomb bay spur wires put through eyelets time beginning longest wire droppable stores put under elastic bands slow pull fourth line will release stores time sequence beauty using elastic bands bomb bay will facilitate different sizes shapes droppable stores will hold fast parachutes folded against dummy figures will hold until released torpedo can carried using first last bands released fast pull release line has functioned flawlessly smoke baby powder released compartment aft wheel well outboard engine nacelle one-inch square hatch bottom cloth hinged hatch door 1 square k soft rubber epoxied inside surface make seal prevent powder escaping until release pin activated air moving past open hatch engine vibration shaking powder down will expel last bit powder Ive found four ounces baby powder ooming through one-inch square opening 60-foot lines travelling reasonable close scale speed will last about two rounds course powder rounds Birds Feather coincidence weve got another twin-engined scale subject spotlight month Phillip Perez brother past contributor Jeff sent us info sport scale version Luftwaffes little-remembered Heinkle He2 19 219 two-seat long-range fighter employed 194344 intercept nightly Allied bombing raids over Ger accomplish equipped radar thus four antenna sticking out nose powerful armament no less six forward-firing cannons Phils scratch-built model has wingspan 60 powered two Testors McCoy 35 engines construction engine nacelles especially noteworthy Typically multiengined scale models difficult get things required confines engine nacelles addition engines fuel tanks often need room landing gear installation gear retractable problem compounds greatly Obviously space critical structure nacelle itself must kept absolute minimum sacrificing strength Phils nacelle construction best idea have seen yet nacelle itself made epoxyglass turn glassed wing structure plywood fire wall removable removed brings engine mount fuel tank tank held onto back firewall metal strap plywood ring mounted nacelle has blind nuts installed accommodate three firewall mounting bolts accom panying drawing photo should give general idea Safety workshop no accident Mike Gretz Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 39 Paul Fewell Ft Mitchell Kentucky Unlike Max engines HP-40 really needs disassembled cleaned upon receipt Almost always sleeve ports have flashing residue must cleaned up Several cases metal shavings bearings have seen Use X acto knife Dremel tool wire brush clean up ports Apparently three models HP-40 depending local hobby shop got engine stock 1 Old style silver case silver head engine does have chrome-plated liner 2 Silver Star silver case black head engine also does have chrome-plated liner comes two head gaskets thick thin can run engine thick thin gasket will also run both gaskets place 3 Gold Cup black case gold head engine has chrome liner hand-lapped ring rear rotor HP-40 can ordered Dykes ring can front rotor desired stock form bearings sometimes will feel little rough after normal break-in should okay Paul suggests lapping everything sight back plate case front end case head case piston/ring sleeve major modifications needed make engine right stunt cut 030 off top case sleeve fits course requires machinist Next 030 steel shim has made hold head original height final modification dome out head approx imately 1/16 using Dremel milling machine ring should smoothed off top bottom surfaces using Arkansas stone also smooth inside ring using dowel 600 paper Lap ring sleeve set cold ring gap tight 005 loose 004 needle valve should installed locking screws case instances will end up spray bar bearer use ST 46 needle valve assembly will have cut off ears case get spray bar fit use ST 60 needle should fit correctly out cutting off ears Kim Craft needle valve 80 threads per inch opposed ST 46 needle 60 threads per inch can used also fine tuning uniflow tank seems must HP-40 plane upright position engine will normally have 106 Model Aviation
Edition: Model Aviation - 1979/04
Page Numbers: 38, 105, 106
IN THE November 1978 ModelAviation will find two photos page 45 scale model related part months column referring beautiful scratch-built Japanese Betty bomber constructed Ken Long Whit tier CA championshipcaliber precision scale model re spect saw either last two Nationals will undoubtedly remember its interesting performance flight line among exciting its kind Multi-engined military bombers fight ers have always strong favorites CL Scale eventmuch Free Flight Radio Controldue CL point structure limits imposed typical scale models aerobatic performance confines CL flight circle Kens Betty embodies desirable charac teristics subject good airfoil wing area moments plenty power multitude possible mechanical scale options added dimension Kens model intriguing way uses Continued page 105 LOOKIINO FROM THE BOTTOM OF THE PLANE 3/B ELASTIC BANDS PARACHUTE FOLDED AGAINST DUMMY STORES ARE HELD AGAINST CEILING OF BOMB BAY 90 BELLCRANK RETURN SPRING ettys Better RELEASE Bomb Boy ALINE SCREW EYES ARE SCREWEDBELAST IC AND EPOXIED INTO 1/4 50 BAND BASSWOOD RUNNING ALONG THE INSIDE OF THE BOMB BAY Ken Longs versatile Bomb-Bay System can release different types droppabie stores bombs torpedoes paratroopers Although designed CL Scale Betty bomber basic idea can used RC scale model Notethatthethree spurwiresaredifferent lengths allowing stores released sequence ali time SMOKE SYSTEM USED IN KEN LONGS SHOT DOWN JAPANESE BOMBER BOTTOM OF WINGOUTBOARD ENGINE NACELLE I______________________________________________ IPOWDERI 1COMPARTMENT HINGE \ ~HEEL WELL HATCH FORWARD PLYWOOD DOOR COVERED ON INSIDE WITH 1/8 THICK RUBBER FIBERGLASS ENGINE NACELLE MOUNTING BOLTS / RGLASS NACELLE LPLYWOOD MOUNTING RINGBLIND NUTS ON THE INSIDE WOOD FIRE WALL WITH TANK AND ENGINE MOUNTED TO IT 38 Model Aviation 6 Phillip Perez scaled Heinkel 219 plastic model Lindberg holding Clever engine installation see sketch may just ticket next multi-engined model REVENGER 60-Size Pattern Designed Dick Russ Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81A 8 3/4 lbs Revenge can sweet Revenger. pattern design can win with$1 See nearest hobby shop first full line brochure write Model Merchant P0 Box 3792 Irving TX 75061 Soaring Society San Francisco area proved successful Limited ships 1350 sq surface area entries included expanded Paragon Aquila X Ls some original designs bi winged Olympic II won design award its builder Larry Horacek Bob McGowen expanded Paragon took first place subjects mentioned have leaning towards things bit differ ent lets continue eventor part taskthat long overdue modifica tion suggestion different First clubs contest directors feel beauty grace thermal flight should end punch ground often becomes test structural integrity ones ship Efforts de-emphasis spot landing has seen events round fat spots small round spots long skinny runways large square runways points landing hardly points landings attempts efforts de-emphasize landing some efforts eliminate dork type landing Harris Hill gang Elmira NY have proponents land like real ones creed judges grade landings year annual big bashno pun intended fact judges full-scale fliers neces sarily versed model sailplanes should could land created little solution landing problem arguments generated rules committee meeting LSF tournaments past included sites hard-surfaced areas same contests thought prudence would prevail greased-on landings would order day Didnt happen sharpshooters added protective covering ships some planes banged 100-point spots carrying padding beauty pag eant reject So over years whether runways round square skinny fat whether points values large small landing points margin victory dorkers usually won best solution above has come along result Mid-Ohio Soaring Societys MOSS efforts cure landing syndrome remedy simple youll wonder wasnt thought before Bob Colgroves idea have line about three inches wide drawn ground wouldnt considered precision line guide reference line Somewhere line another line drawn stretched right angles Now point value intersection two lines zero increases along refer ence line whatever rate desire Up point circular landing zone point value tape rectangular runway would serve well above mentioned reference line Bobs system differs order score landing points model must touch down before cross stripe outside circle Points earned model comes rest Granted fields close clipped allow type scoring lot Cosgroves suggestions further state touch down bounce scoring zone no points landing earned course cross intersection landing boundaries before touchdown its no landing score can readily seen dork type landing strategy no value used before landing zone youll either come abrupt stop bounce in either case its zero score Landings type could encourage fields hard-surfaced runways used listening Harris Hill L/D members would probably promote sailplanes wheels sod-farm fliers surely could try landing event Its hard say whether will catch does can bet some 90 100 point scores usually attained some will long time acoming names top ten some regions will change around during season meantime use well worn clicbehappy landings IJan Pn4ss Rt 2 Box 490 Plainfield IL 60544 mechanical flight options tell story takes realism flight step further fact fully understand realism depicted Kens flight plan should look briefly part full-scale Bettys combat history Mitsubishi G4M Type 1 Land Attack Aircraft allied code named Betty saw action Pacific theater World War II Aleutian Islands Austra ha Betty primary weapons Japan gained its initial victories During early stages war identified among feared Japanese offensive combat air craft like infamous Zero fighter legend soon proved part myth Japanese insistance maximum range maneuverability Zero expense protective armor rendered Betty supremely vulnerable air ground fire earliest versions Betty carried 1100 gallons fuel inimense totally unprotected wing tanks earning nicknames Type 1 Lighter Flying Cigar own crews Later versions incorporated add-on attempts armor part Betty always retained notorious inflamabiity special version Betty desig nated G4M2e subject Kens model built limited numbers parent aircraft Ohka allied code named Baka rocket-powered suicide bomb Betty normally approached within 2040 miles target launched Ohka about 200 mph Kamikazee pilot attempted glide about 230 mph within three miles target before igniting rockets plung ing down target speeds excess 600 mph noted vulnerability Betty its slow speed unwieldiness Ohka aboard enabled Allied fighter interception shoot down ill-fated missions soon withdrawn service flight Kens Betty recreates scene starting launching gliding Ohka bomb appearance smoke April 1979 105 CL Scale/Gretz continued page 38 THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 Miami Florida 33180 2657 NE 188th Street Telephone 935-1436 several parachuting crew members signal Bettys demise hands Allies Come didnt really expect him crash did heart Kens replica clever internal bomb bay release mechanism devised Five different kinds droppable stores can released bomb bay duplicating capabilities versatile full-scale Bettys basic ideas behind system give great potential use other scale subjects could easily adapted RC scale model Kens letter describes working details main wire runs parallel fuselage inboard side bomb bay Elastic bands glued epoxy opposite side bomb bay Small eyelets wrapped thread epoxied other end elastic bands bands stretched across bomb bay spur wires put through eyelets time beginning longest wire droppable stores put under elastic bands slow pull fourth line will release stores time sequence beauty using elastic bands bomb bay will facilitate different sizes shapes droppable stores will hold fast parachutes folded against dummy figures will hold until released torpedo can carried using first last bands released fast pull release line has functioned flawlessly smoke baby powder released compartment aft wheel well outboard engine nacelle one-inch square hatch bottom cloth hinged hatch door 1 square k soft rubber epoxied inside surface make seal prevent powder escaping until release pin activated air moving past open hatch engine vibration shaking powder down will expel last bit powder Ive found four ounces baby powder ooming through one-inch square opening 60-foot lines travelling reasonable close scale speed will last about two rounds course powder rounds Birds Feather coincidence weve got another twin-engined scale subject spotlight month Phillip Perez brother past contributor Jeff sent us info sport scale version Luftwaffes little-remembered Heinkle He2 19 219 two-seat long-range fighter employed 194344 intercept nightly Allied bombing raids over Ger accomplish equipped radar thus four antenna sticking out nose powerful armament no less six forward-firing cannons Phils scratch-built model has wingspan 60 powered two Testors McCoy 35 engines construction engine nacelles especially noteworthy Typically multiengined scale models difficult get things required confines engine nacelles addition engines fuel tanks often need room landing gear installation gear retractable problem compounds greatly Obviously space critical structure nacelle itself must kept absolute minimum sacrificing strength Phils nacelle construction best idea have seen yet nacelle itself made epoxyglass turn glassed wing structure plywood fire wall removable removed brings engine mount fuel tank tank held onto back firewall metal strap plywood ring mounted nacelle has blind nuts installed accommodate three firewall mounting bolts accom panying drawing photo should give general idea Safety workshop no accident Mike Gretz Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 39 Paul Fewell Ft Mitchell Kentucky Unlike Max engines HP-40 really needs disassembled cleaned upon receipt Almost always sleeve ports have flashing residue must cleaned up Several cases metal shavings bearings have seen Use X acto knife Dremel tool wire brush clean up ports Apparently three models HP-40 depending local hobby shop got engine stock 1 Old style silver case silver head engine does have chrome-plated liner 2 Silver Star silver case black head engine also does have chrome-plated liner comes two head gaskets thick thin can run engine thick thin gasket will also run both gaskets place 3 Gold Cup black case gold head engine has chrome liner hand-lapped ring rear rotor HP-40 can ordered Dykes ring can front rotor desired stock form bearings sometimes will feel little rough after normal break-in should okay Paul suggests lapping everything sight back plate case front end case head case piston/ring sleeve major modifications needed make engine right stunt cut 030 off top case sleeve fits course requires machinist Next 030 steel shim has made hold head original height final modification dome out head approx imately 1/16 using Dremel milling machine ring should smoothed off top bottom surfaces using Arkansas stone also smooth inside ring using dowel 600 paper Lap ring sleeve set cold ring gap tight 005 loose 004 needle valve should installed locking screws case instances will end up spray bar bearer use ST 46 needle valve assembly will have cut off ears case get spray bar fit use ST 60 needle should fit correctly out cutting off ears Kim Craft needle valve 80 threads per inch opposed ST 46 needle 60 threads per inch can used also fine tuning uniflow tank seems must HP-40 plane upright position engine will normally have 106 Model Aviation
Edition: Model Aviation - 1979/04
Page Numbers: 38, 105, 106
IN THE November 1978 ModelAviation will find two photos page 45 scale model related part months column referring beautiful scratch-built Japanese Betty bomber constructed Ken Long Whit tier CA championshipcaliber precision scale model re spect saw either last two Nationals will undoubtedly remember its interesting performance flight line among exciting its kind Multi-engined military bombers fight ers have always strong favorites CL Scale eventmuch Free Flight Radio Controldue CL point structure limits imposed typical scale models aerobatic performance confines CL flight circle Kens Betty embodies desirable charac teristics subject good airfoil wing area moments plenty power multitude possible mechanical scale options added dimension Kens model intriguing way uses Continued page 105 LOOKIINO FROM THE BOTTOM OF THE PLANE 3/B ELASTIC BANDS PARACHUTE FOLDED AGAINST DUMMY STORES ARE HELD AGAINST CEILING OF BOMB BAY 90 BELLCRANK RETURN SPRING ettys Better RELEASE Bomb Boy ALINE SCREW EYES ARE SCREWEDBELAST IC AND EPOXIED INTO 1/4 50 BAND BASSWOOD RUNNING ALONG THE INSIDE OF THE BOMB BAY Ken Longs versatile Bomb-Bay System can release different types droppabie stores bombs torpedoes paratroopers Although designed CL Scale Betty bomber basic idea can used RC scale model Notethatthethree spurwiresaredifferent lengths allowing stores released sequence ali time SMOKE SYSTEM USED IN KEN LONGS SHOT DOWN JAPANESE BOMBER BOTTOM OF WINGOUTBOARD ENGINE NACELLE I______________________________________________ IPOWDERI 1COMPARTMENT HINGE \ ~HEEL WELL HATCH FORWARD PLYWOOD DOOR COVERED ON INSIDE WITH 1/8 THICK RUBBER FIBERGLASS ENGINE NACELLE MOUNTING BOLTS / RGLASS NACELLE LPLYWOOD MOUNTING RINGBLIND NUTS ON THE INSIDE WOOD FIRE WALL WITH TANK AND ENGINE MOUNTED TO IT 38 Model Aviation 6 Phillip Perez scaled Heinkel 219 plastic model Lindberg holding Clever engine installation see sketch may just ticket next multi-engined model REVENGER 60-Size Pattern Designed Dick Russ Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81A 8 3/4 lbs Revenge can sweet Revenger. pattern design can win with$1 See nearest hobby shop first full line brochure write Model Merchant P0 Box 3792 Irving TX 75061 Soaring Society San Francisco area proved successful Limited ships 1350 sq surface area entries included expanded Paragon Aquila X Ls some original designs bi winged Olympic II won design award its builder Larry Horacek Bob McGowen expanded Paragon took first place subjects mentioned have leaning towards things bit differ ent lets continue eventor part taskthat long overdue modifica tion suggestion different First clubs contest directors feel beauty grace thermal flight should end punch ground often becomes test structural integrity ones ship Efforts de-emphasis spot landing has seen events round fat spots small round spots long skinny runways large square runways points landing hardly points landings attempts efforts de-emphasize landing some efforts eliminate dork type landing Harris Hill gang Elmira NY have proponents land like real ones creed judges grade landings year annual big bashno pun intended fact judges full-scale fliers neces sarily versed model sailplanes should could land created little solution landing problem arguments generated rules committee meeting LSF tournaments past included sites hard-surfaced areas same contests thought prudence would prevail greased-on landings would order day Didnt happen sharpshooters added protective covering ships some planes banged 100-point spots carrying padding beauty pag eant reject So over years whether runways round square skinny fat whether points values large small landing points margin victory dorkers usually won best solution above has come along result Mid-Ohio Soaring Societys MOSS efforts cure landing syndrome remedy simple youll wonder wasnt thought before Bob Colgroves idea have line about three inches wide drawn ground wouldnt considered precision line guide reference line Somewhere line another line drawn stretched right angles Now point value intersection two lines zero increases along refer ence line whatever rate desire Up point circular landing zone point value tape rectangular runway would serve well above mentioned reference line Bobs system differs order score landing points model must touch down before cross stripe outside circle Points earned model comes rest Granted fields close clipped allow type scoring lot Cosgroves suggestions further state touch down bounce scoring zone no points landing earned course cross intersection landing boundaries before touchdown its no landing score can readily seen dork type landing strategy no value used before landing zone youll either come abrupt stop bounce in either case its zero score Landings type could encourage fields hard-surfaced runways used listening Harris Hill L/D members would probably promote sailplanes wheels sod-farm fliers surely could try landing event Its hard say whether will catch does can bet some 90 100 point scores usually attained some will long time acoming names top ten some regions will change around during season meantime use well worn clicbehappy landings IJan Pn4ss Rt 2 Box 490 Plainfield IL 60544 mechanical flight options tell story takes realism flight step further fact fully understand realism depicted Kens flight plan should look briefly part full-scale Bettys combat history Mitsubishi G4M Type 1 Land Attack Aircraft allied code named Betty saw action Pacific theater World War II Aleutian Islands Austra ha Betty primary weapons Japan gained its initial victories During early stages war identified among feared Japanese offensive combat air craft like infamous Zero fighter legend soon proved part myth Japanese insistance maximum range maneuverability Zero expense protective armor rendered Betty supremely vulnerable air ground fire earliest versions Betty carried 1100 gallons fuel inimense totally unprotected wing tanks earning nicknames Type 1 Lighter Flying Cigar own crews Later versions incorporated add-on attempts armor part Betty always retained notorious inflamabiity special version Betty desig nated G4M2e subject Kens model built limited numbers parent aircraft Ohka allied code named Baka rocket-powered suicide bomb Betty normally approached within 2040 miles target launched Ohka about 200 mph Kamikazee pilot attempted glide about 230 mph within three miles target before igniting rockets plung ing down target speeds excess 600 mph noted vulnerability Betty its slow speed unwieldiness Ohka aboard enabled Allied fighter interception shoot down ill-fated missions soon withdrawn service flight Kens Betty recreates scene starting launching gliding Ohka bomb appearance smoke April 1979 105 CL Scale/Gretz continued page 38 THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 Miami Florida 33180 2657 NE 188th Street Telephone 935-1436 several parachuting crew members signal Bettys demise hands Allies Come didnt really expect him crash did heart Kens replica clever internal bomb bay release mechanism devised Five different kinds droppable stores can released bomb bay duplicating capabilities versatile full-scale Bettys basic ideas behind system give great potential use other scale subjects could easily adapted RC scale model Kens letter describes working details main wire runs parallel fuselage inboard side bomb bay Elastic bands glued epoxy opposite side bomb bay Small eyelets wrapped thread epoxied other end elastic bands bands stretched across bomb bay spur wires put through eyelets time beginning longest wire droppable stores put under elastic bands slow pull fourth line will release stores time sequence beauty using elastic bands bomb bay will facilitate different sizes shapes droppable stores will hold fast parachutes folded against dummy figures will hold until released torpedo can carried using first last bands released fast pull release line has functioned flawlessly smoke baby powder released compartment aft wheel well outboard engine nacelle one-inch square hatch bottom cloth hinged hatch door 1 square k soft rubber epoxied inside surface make seal prevent powder escaping until release pin activated air moving past open hatch engine vibration shaking powder down will expel last bit powder Ive found four ounces baby powder ooming through one-inch square opening 60-foot lines travelling reasonable close scale speed will last about two rounds course powder rounds Birds Feather coincidence weve got another twin-engined scale subject spotlight month Phillip Perez brother past contributor Jeff sent us info sport scale version Luftwaffes little-remembered Heinkle He2 19 219 two-seat long-range fighter employed 194344 intercept nightly Allied bombing raids over Ger accomplish equipped radar thus four antenna sticking out nose powerful armament no less six forward-firing cannons Phils scratch-built model has wingspan 60 powered two Testors McCoy 35 engines construction engine nacelles especially noteworthy Typically multiengined scale models difficult get things required confines engine nacelles addition engines fuel tanks often need room landing gear installation gear retractable problem compounds greatly Obviously space critical structure nacelle itself must kept absolute minimum sacrificing strength Phils nacelle construction best idea have seen yet nacelle itself made epoxyglass turn glassed wing structure plywood fire wall removable removed brings engine mount fuel tank tank held onto back firewall metal strap plywood ring mounted nacelle has blind nuts installed accommodate three firewall mounting bolts accom panying drawing photo should give general idea Safety workshop no accident Mike Gretz Box 162 Montezuma IA 50171 CL Aerobatics/Paul continued page 39 Paul Fewell Ft Mitchell Kentucky Unlike Max engines HP-40 really needs disassembled cleaned upon receipt Almost always sleeve ports have flashing residue must cleaned up Several cases metal shavings bearings have seen Use X acto knife Dremel tool wire brush clean up ports Apparently three models HP-40 depending local hobby shop got engine stock 1 Old style silver case silver head engine does have chrome-plated liner 2 Silver Star silver case black head engine also does have chrome-plated liner comes two head gaskets thick thin can run engine thick thin gasket will also run both gaskets place 3 Gold Cup black case gold head engine has chrome liner hand-lapped ring rear rotor HP-40 can ordered Dykes ring can front rotor desired stock form bearings sometimes will feel little rough after normal break-in should okay Paul suggests lapping everything sight back plate case front end case head case piston/ring sleeve major modifications needed make engine right stunt cut 030 off top case sleeve fits course requires machinist Next 030 steel shim has made hold head original height final modification dome out head approx imately 1/16 using Dremel milling machine ring should smoothed off top bottom surfaces using Arkansas stone also smooth inside ring using dowel 600 paper Lap ring sleeve set cold ring gap tight 005 loose 004 needle valve should installed locking screws case instances will end up spray bar bearer use ST 46 needle valve assembly will have cut off ears case get spray bar fit use ST 60 needle should fit correctly out cutting off ears Kim Craft needle valve 80 threads per inch opposed ST 46 needle 60 threads per inch can used also fine tuning uniflow tank seems must HP-40 plane upright position engine will normally have 106 Model Aviation