Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow
Edition: Model Aviation - 1980/06
Page Numbers: 40, 41, 42, 43, 112, 113
Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow
Edition: Model Aviation - 1980/06
Page Numbers: 40, 41, 42, 43, 112, 113
Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow
Edition: Model Aviation - 1980/06
Page Numbers: 40, 41, 42, 43, 112, 113
Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow
Edition: Model Aviation - 1980/06
Page Numbers: 40, 41, 42, 43, 112, 113
Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow
Edition: Model Aviation - 1980/06
Page Numbers: 40, 41, 42, 43, 112, 113
Henry Haffke GEE BEE SENIOR SPOR MODEL Y part2 Last month author described fuselage engine cowl landing gear complete plans presented convenience Now completes structure describes finishing discusses flying techniques IN THE previous issue went through procedure building fuselage engine cowl landing gear Now will complete con struction finishing detailing flying craft Wing ribs cut 3/32 balsa except four 1/ ply ribs A-i support landing gear mount four pruce spars marked rib positions ribs slid onto spars Support bottom spars two equal size blocks imilar Use block near wing root near D E rib keeps structure true worked Weight spars blocks keep line make sure building surface true Once ribs positioned spars glued Add eading edge trailing edge Add tip parts cut 3/8 balsa Webbing installed between rib Out board ply ribs Webbing front spars rear spars webbing has completed cross bracing balsa between ribs added Add plates attachment com pression struts brace wires Strut plates necessary top surface brace wire plates required both top bottom surfaces Ailerons now built Laminate two parts aileron leading edge carve round shape front edge can spot-glued wing trailing edge 3/32 aileron base added dry ribs added top bottom structure sanded final smoothness before cutting aileron apart landing gear support blocks built up ply 3/16 ply seen side view epoxied notches A- 1 ribs completes basic wing structure left panel built directly over drawings using same procedure used right panel except built upside down leveling blocks both halves wing 40 Model Aviation June 1980 41 Left point wing structure looks simple normally framed wingnote aileron torque rod Right diagonals lock ittogetheras rigidly bridge fuH-depth Xs important probably something very few us have ever thought about 7 Agreatwayto lickthe servo wing problem long leadstwo servos side side operating torque tube aileron empennage French say showing authentic markings real aircraft Note two wires rigidize fin Fast maneuverable Y won National Aerobatic Championships ixnougn ruseiage articie ran asi muniri seemed good idea provide picture fuselage installation Nothing fancy As tine pilot Henry turned over first test hop Sid Clements checking control movements prior first hop already turned thumbs down 4in pitch prop bent under thrust loads approach holding transmitter down left side complete joined dihedral braces two different braces front spars rear spars Two required dihedral braces give correct dihedral angle wing Support wing leveling blocks block up tip hold everything square drying Finally center section sheeted 3/32 balsa aileron hinged hinge using short length aluminum tube hinge pin pine block installed inboard front edge aileron take inum torque tube Use 1-in section dowel end torque tube Drill pine block tube lined up properly screw stalled bottom go through block tube long 4-40 bolt used through inner end torque tube Use commercially available aileron connectors 4-40 bolts adjustable aileron crank suggest separate servo aileron ailerons quite large flight loads will lessened using two servos connected Y cord instead normal single servo installation Stab Elevator built similar fin rudder described last issue built up a parts shown drawings may made solid a sheet Scale hinges wire hinge pins shown rudder drawings favorite commercial hinges can used Elevators connected Sig elevator horn Use horn offset will make completely internal installation tail surfaces have installed wing has fitted installed stringers added fuselage everything sanded final smoothness Radio Installation installation made get balance shown plans Normally servos receiver go area between F-4 F-5 battery can located wherever necessary help balance plenty room everywhere Mount everything recommended manufacturer being sure pushrods connect give correct move ment relation control sticks Use stiff pushrodsat least Yi dowel Finishing There ways finish model todays materials always problem decide way go intended go full fabric dope route last minute decided try keep things light possible stay under 15 lb weight limit scale competition entire model covered white Permagloss Coverite Red Super MonoKote used trim Patterns cut paper wing trim four panels will identical paper pattern also made get two fuselage sides same markings cut red MonoKote Gee Bee logo fin black MonoKote Automotive striping tape used pin striping Permagloss Coverite very realistic appearing material MonoKote trim gives very light finish parts doped wing fillet landing gear fairings engine cowl finish just got model under 15 lb weight looking doped finish would have gone over limit Detailing This begins compression struts stab struts compression struts cut streamlined aluminum tubing available hobby shops held place short sheet-metal screws stab struts shaped spruce suggest omitting have build up stabthey add con siderably its strength brace wires give really distinctive appearance made elastic cord found fabric shops An aluminum bracket made thin aluminum extends through fuselage brace wire attachment Bracket should extend outside fuselage about 3/ inch Three holes drilled end take brace wire ends Use quick-link end wire realistic looking connector Brace wires threaded through wing landing gear fairing 42 Model Aviation zantiora tiranvilIe runs up tne Senior Sporisser flew overthe country support air craft other Gee Bee racers flew 5th 1933 Thompson Trophy Race Maude Tait Moriarty today Bill Turner Model Z replica Picture taken recent 50th Anniversary celebration Gee Bee Com pany Springfield Massachusetts Second Senior Sportster built EL Cord automobile firm Smooth cowl open landing gear fairings faired tail wheel factory roll-out photo shows front pit covered over Right second model WY Chicago International Air Races 1933 after modifications including 450-hp Wright Whirlwind full LG fairings long windshield -A - bad base eppasiw leading gear Oui1t block aluminum bracket screwed block building model raced front cockpit covered over cover made 1/32 ply attached small-sheet metal screws Louvers behind engine cowl formed thin aluminum tab end Slits made covering balsa louver Hot Stuff makes stay put long piano hinge side fuselage made slicing plastic tube threading length music wire model radial engine dummy engine must drawings show pattern engine shroud Wasp cylinders made plug Wasp cylinder formed cylinders small vacuum-form machine cylinders backed balsa glued rear shroud shroud cut two layers balsa ring 1 / 16 ply backing 8 dowel used pushrods shroud painted flat back cylinders gloss black Flying Flying -scale model real joy especially have done before flown few ofthe high-wing -scale aircraft built other club members low wing model something else should mention model came after watching Mr Bertram fly scale Aeronca LB Dayton Nationals 1976 absolutely realistic handling model ever seen flying smaller Senior Sportster March 1976 MA right decided would have Senior Sportster -scale first flights made Clayton R/C Club field having inter club patternevent meet after meet flew smaller Senior Sportster does pattern maneuvers engaged services local test pilot supreme Syd Clements has test flown scale designs though have tested several myself have him job available since highly skilled pilot can immediately tell what will improve ships performance needs little engine offset other minor adjustments can tell right away removed dummy engine cowl could set engine Robart Pump installed since its break-in flights Syds test ship running 16/4 prop blades Continued page 112 Maude Tait taxies back after winning 1931 Aerol Trophy Cleveland National Air Racesan interesting comparison model Lowell ayIes 1931 Thompson winner Z Maude Tait winner 1931 Aerol Trophy Race Y Bayles killed two days later attempt break worlds speed record gas cap came off shattered windshield causing Bayles throw craft out control over 300 mph ORKNALSEXHAUST 4ix, ix ldiie . tiltS j5tbitibi ER 60 size engines Use template check adapter will accommodate 60 size engine Whether youre hoats planes new universal eshaust header Byron Originals answer special exhaust requirements few reasons Adapter can either drilled match engine hole pattern strap mounted Adapter will accommodate side rear exhaust engines Header pipe can trimmed achieve maximum tuned efficiency used conjunction commercially produced tuned pipes Large throated non-restrictive exhaust adapter ensures optimum engine performance Header pipe can rotated full 360 degrees adapter 3/ -5A lateral adl glow plug centerline pipe NOTE Exhaust adapter will accommodate 05 VF HB rear exhaust OPS engines cable slack allowing complete freedom slide position affecting carburetor device such could used hold flaps up down cable throttle tailhook could pull flaps down throttle could checked deck since flaps would need pushed up resetno latches fool Jim Storts Chandler AZ once flew twoline Carrier model using over-center bellcrank throttle control throttle bellcrank connected elevator pushrod such way up elevator would open throttle its fully-closed position Full down elevator would push bellcrank over center closed position Jim could fly two-minute low speeds Profile-sized model using set-up system practical Class Class II since Profile requires three lines Ill discuss other control system options next column including some exotic systems well conventional Ive chance look Sterling F6F Hellcat kit introduced last year model has 42 span giving wing area about 360 sq large wing should give good low-speed performance flaps wood die cutting good quality Hellcat should prove good performer Profile Carrier few kits available should easily qualify scale bonus points being readily available through local hobby shops RichardL Perry 416 WoodhiliDrive Golds boro NC 27530 Gee Bee/Haffke Continued page 43 thin atrasd fly tips flexing too much other large props Top Flite 14/6s tried didnt give pull larger did Syd felt would suitable reinstalled cowl left dummy engine off test flights strong wind kept shifting Factory Direct $1 695 plus 51 10 shipping & handling $230 shipping costs forforeign orders Prices subject change wf 0 noticel Iowa residents add 3% sales tax Send check money order Byron Originals PO 279 Ida Grove Ia 51445 Visa Master charge also accepted no taxi turns attempted Taxi ahead wind no problem seemed OK Syd opened throttle tail came up immedi ately model airborne before knew what happening climbed out majes tically beautiful thing ever seen air Wing loading very low very little speed needed take off Syd flew back fourth couple times moving trim levers slightly until satisfied trim flew hands off straight ahead tried aerobatic maneu vers First tried roll did very nicely reported ailerons little sluggish Next tried loop received big hand ship flew through beautifully just flew right up over top just like real used big P&W Wasp Syd continued second loop third agreed no better loops seen during pattern meet just concluded flew invertedwhich does beauti fully made several low passes could try get pictures After several passes set up landing reduced throttle As descended engine quit first landing dead-stick Syd called attention fact model hands-off As dropped transmitter left side ship maintained its rate descent kept straight ahead Just before touchdown used transmitter flare ship gentle landing grass strip found tank empty suggested fly full-scale flight pattern could check gas consumption since feared 14-oz tank might too small Webra 91 Syd made second flight executing maneuvers called Out flew full-scale flight made another beautiful landing tank still about 6 oz left good reserve Now turn started first takeoff turned out little rough suddenly found floundering aircraft air sufficient flying speed have effective control response held up elevator take off run Syd ordered overdid little ship took off before expected applied rudder straightened out left bank couldnt get out ailerons got nose down pick up speed Everything immediately straightened out climbed out beautifully flew complete scale-flight pattern further incident beautiful flying bird very gentle responsive except slightly sluggish aileron response landing very smooth just slightest little bounce followed smooth roll-out cleaned ship loaded station wagon After removing wing found reason sluggish ailerons left Out two screws aileron servo tray allowed flex considerably also tightened lock nuts 4-40 bolts went through torque rods actuate rods Between two aileron movement somewhat less thass positive next flights greatly improved proper securing aileron cranks servo tray took Senior Sportster Rhinebeck Classic its first contest exposure adding -scale event Model Y join other Gee Bee models great contest After static judging Senior Sportster top score 90 just two points ahead another Gee Bee Model E Sportster built friend Joe Gallagher first flight thing beauty getting highest flight score day However second flight executing figure-8 craft suddenly rolled over right went trees Something went wrong new radio no aileron control Fortu nately damage model minimal took four evenings make repairs have flying again third flight after repairs same thing happened again Syd flying it over open field able save rudder elevator flew contest next day again went out control again saved rudder elevator installed radio test ship no trouble encountered decided try another radio big Y substituted old reliable system got ready big Bealton VA contest test fly night before less desirable conditions windy high gusts little drizzle found some bigger props tests made 16/4 prop proved great engine aircraft Test flights went great bad conditions felt ship ready another contest try Bealton model scored 94 static flight time came its first flight beautiful start finish craft handled beautifully poor weather conditionshigh gusty winds drizzle Its second flight better After flying over Senior Sportster won Quarter Scale event easily scored higher winner other events consequently awarded contests grand prize 5-channel system know would have flown better after loss aileron control three previous occasions still little gun shy Senior Sportster lovely aircraft performs beautifully did real back early 1 930s hope everyone builds will enjoy much have anyone wishes fly contests Senior Sportster will need documentation photos very rare craft have probably largest collection photos craft existence will glad have copies made anyone needs scale docu mentation have both Senior Sportsters built various configurations appeared over years pictures 11 2 Model Aviation Assembly includes 2-piece clamp capscrews & lockwashers 4 cinch straps cast aluminum adapter 6 straight pipe 90 degree curved header 14x6 two silicone sleeves Different Approach/Stoy Continued page 46 successful models 2 A streamline method applying opening torque hinges must found Currently use rubber bands 3 A streamlined q-trigger can probably designed As new idea its eventual impact difficult predict approach become popular essential people begin win designs since competitive free flighters simply follow trends winning models feeling dont have time experiment readers have ability design successful models become convinced approach worthy efforts feel free flight can become exciting changing category over next few years want become involved building folding wing planes would interested discussing ideas problems Editors Note As competitionfreeflighters aware Stan Stoy has used principles achieve hand-launched glider times demonstrate great performance increase much first few people able believe possible power concept offers quantum jump performance although devel opment mechanics poses challengeper haps met Jim Newman did illustrations remarks forces FFship enormous witness flutter loss components year Ifeel wishful thinking expect very low forces involved Q FF Endurance/Meuser Continued page 49 after taping wing piece scrap plywood would imagine beginner might have bit problem sanding four sections separately getting airfoils match joints tendency would over-sand ends panels adjacent joints use large sanding block/2 x 3 x lOin minimumwould help heres thought works ol bumble thumbs should work anybody Tape four sections together joints using chordwise strips masking tape lower surface sanding wing piece sanding completed tape still attached apply glue choice opposing surfaces prop panels up proper angles smear glue oozes top joint nice fillet using finger let chemistry proceed tape bottom will keep excess glue running over town glue-skin reinforcement can added later elect sand wing panels separ ately masking-tape trick neat way make mitered joints recently read magazine about fine furniture Ive doing miterjoints way both fine furniture glider wings some 40 years didnt know other way price Super Chuck $4 plus $150 handling shipping per box box could contain several Super Chucks other Blue Ridge kits supplies intend ordering single Super Chuck might pay check Blue Ridge first address PO Box 429 Skyland NC 28776 library Im sure Bill Warner will present complete run-down Bill Hannans recently published book Peanut Power scale modelers point view Ill just say few things about general free flighters point view emphasis course Peanut Scale secondary emphasis other forms freeflight scale modeling sections construc tion covering props materials ground-support equipment flying forth handy trouble-shooting chart applicable small free-flight rubber-power model begin ning free fighter would find much value think beginner would better off starting something bit larger Peanut Scale such P-30 provided has access large enough flying field after seeing book might decide Peanut Scale branch freeflight hed like pursue price tag $795 makes comparable price four general interest ie 85% RC magazines hobby shop doesnt have yet can order directly publisher Historical Aviation Album PO Box 33 Temple City CA 91780 Include buck per order June 1980 113 mostly Bob Granville other members oftrigger securely latch panels anville family collectionwould favor folding concept conjunction good Seelig timer couple offorce multiplying levers latch wings indicative kind thinking may necessary turn brilliant concept practical reality Once happens things will never same Stan shows us vision confident cleverfreeflighters can turn physical reality After nota paper idea Stans work has brought us halfway down road begin some half-A sheet balsa things pot ofgold end rainbow