Radio Control Giant Scale Bob Beckman SPARROWHAWK aileron hinges Several times past have published pictures A-scale Curtiss F9C-2 Sparrowhawk have working since Hector pup get lot well-deserved kidding about model time taking get finished Actually its Im such slow builder its matter just working example last time did anything two years ago last January may three years ago havent lost interest project fact Im eager get back finish off before finishes off However seems time turn around something comes up claim time keep working blasted thing reason bring up now still get letters asking questions about specific bits pieces model question keeps coming about aileron hinges somewhat unusual month Ill try answer questions about made made Lets start since have have reason doing something before think about several parts answer first ing wanted reproduce Frise-type ailerons used original alrplane dont know what Frise aileron didnt started Sparrowhawk read next two paragraphs know about skip ahead Most us aware need differ ential throw ailerons An aileron deflected down given distance will produce drag opposite aileron deflected up same distance drag produces yawing moment direction opposite desired turn extreme case could wind up turning left apply right alleron building dif ferential throws aileron linkage make Up aileron travel Down aileron equalize drag components side Frise aileron invented Eng lishman first name have forgotten last name Frise idea seal upper surface Down aileron reduce its drag minimum same time open slot lower surface upper sur face Up aileron thus increasing its effec tiveness drag sounds complicated solution ac tually rather simple involves combination proper shapes leading edge aileron trailing edge aileron bay proper location aileron hinge line hinge line near lower surface well back leading edge aileron deflected down its leading edge re mains close overhanging upper surface wing keeping gap very narrow deflected up leading edge drops down below lower surface airfoil slot opened deflects alrflow lower surface wing onto upper surface aileron sounded great 1930 Curtiss engineers thought just thing new little biplane As turned out Spar rowhawks ailerons still needed significant amount differential Given wanted Frise-type aileron going make hinge Remem ber about eight years ago Yes its long since started Sparrowhawk lot things take granted now werent available doing now would probably use some CB Associ ates strap hinges time ex isted didnt know about needed come up hinge support would ex tend almost two inches rear spar wing take considerable forces could expect large aileron nice things about Giant Scale can often reproduce full-scale way doing something Thats essentially what did case took look Westburg drawings Sparrowhawk include some detail aileron hinge real F9C-2 bolted fitting back rear spar fitting extended through slot leading edge aileron sand wiched between two ribs pivot pin through ribs fitting formed hinge Four assemblies used aileron addition aileron control pushrod tached assemblies final hinge very similar identical full-size alrcraft leading edge aileron lead-filled steel tube acts counterweight tube cut hinge locations allow passage hinge fitting model used brass tube filled solder didnt want weaken lead ing edge cutting designed hinge fitting come down above leading edge fitting cut 0090-in alumi num sheet brackets 0050-in alumi num sheet riveted side Four 2-56 machine screws hold fitting rear spar three pieces fitting carefully control horn hinge L right alieron Bobs still-unfinished Sparrowhawk month teiis hinges disassembied R brackets have riveted support fitting hoies brackets machine screws wiil hold bracket rear wing spar 52 Model Aviation Curtis F9C-2 Spanownuwk InST 500 flaS Deen working longerthan has writing coiumnl wants tell us about alieron hinges month hinge assembied can see far behind aiierons leading edge hinge iine located reiationship pushrod fitting pivot-point hinge line will resuit desired differential throw between ieft right aiierons side R can see access hole ets get screwdriver secure machine screwwhich hoids pushrod pivot pin composite PC-board/foam-core-board sandwich structure aileron rib also obvious view cut assembled hinge pins would wind up right location eight assemblies would match support ribs ailerons made sandwiching cut down Y18-in foam core rib between two full ribs made 5-in epoxy/fiberglass PC board material hinge pins turned brass rod shoul der end hole retaining pin other end retaining pins bent - from A2-in music wire Small nylon shoulder washers side support fitting form actual bearing surface hinge pin point hinges worked out still needed get aileron connected servo Again keep mind before todays Giant Scale accessories available felt typical RC clevis its 2-56 threaded rod would marginal Giant Scale use decided make own wound up nylon fitting shown attached hinge assembly fitting pivots brass shaft held rib flathead screw front fitting drilled tapped 4-40 screw pushrod piece A-in aluminum rod 4-40 threads cut end outcome close arrangement real aircraft will completely enclosed wing completed picture assembled aileron shows everything goes together leading edge aileron spar forward will covered thin sheet aluminum piece 1A-in sjxeet balsa will fit against wing rib stubs alleron bay piece will carved slot contour finally piece thin aluminum sheet rear wing spar back will overhang leading edge aileron provide upper seal reasons went trouble aileron hinges other fit tings Sparrowhawk like doing kind thing time tools materials available Actually modeler Unimat Taig lathe/mill ing machine small power sander could re produce aileron hinges abso lutely necessary ingredient doing things like imagination wouldnt RC modelers didnt have lot imagination Bob Beckman 8248 Holly Grove Cf Manassas VA 22110 responding advertisers mention read about Model Aviation Remember Remember time days gone Longer ago yesteryear sound screaming Dooling sheer music ear Remember creations Dick McCoy Redheads knew nothing win classes Speed thru D ignition cause chagrin Remember Speed dominate Everyone least gave try Using HornetsandBantams OK Cubs search pie sky Now Speed king few Weve lost sight magic pearl Lets return magic days gone everyone gave whirlRemember Lou Roberts OF AUTHENTIC FLYING MODEL PLANS ONLY SMALL ASSORT / MEMO LISTED BELOW BEGULAB IN STOEB Aflm01 PLANS GET OUB FAMOUS BOAT SEBVIC1 AUC LA AltICEIID B SCALlOP VIANSD 4 OP 14 UPGP3 B ABBREVIATED 81312245Z 1/1612 1/8 50 1/ SZ 112 S 0Voaght Core P40 15Coo JN4O Jenny 14BAP BE2B& C 29Waco Taper-Wing 36Wretlod Lyrander 35Doug 0-46A Sheer 29Boe 100 SporE 33StIr Trimotor 10Packard boar 11 39Car P36A FighEr 25Vgi Core 0201/4 38Coo CaLEra PBT2a 19Corlis BC4 17FokIer 57 Ftr 31Boyle GreBr 13Soperoorine SAB 36Gram GolIhOok 35Lock Electra #11 43lear Avenger TBF 42Boo 8170 Fl Fort 38BA Mitchell 825 34Mrcci-CeetoIMC72 37Car Bevy SO3C-S 25CBocer B3C1&2 34Doog Trerep SC-3 33Curt BowS F-BE 32DoOlLEllee GB#11 31Boo P48344 0128 32Spofid BollDog 32Howard Ike&5415e 34Tureen 6W Barer 35How Mo Slalligor 3380 P26A LOW 8 35Silo roe TW 42 OH MeeqaLto Book 37 Steorean VTi 43B81kWidow061 30 TAIlS Hwk Ter13 42 C5B204 Helldivr 36 Ford Trirotr 4A0 31 Bellanca Air Boo 33Graon J2F Dock 27 C Seohawl F7C-1 21 51k Arpkik S38 16 H-Pge 0-400 Book 31 Lirdyr LBlrioe 31 Edo 58 Florie 31 Boner Pete 31 C Sparkok F9C-2 31 Boeing Fir F4B3 30 Turners Peero ST 120 Loeniog C-2 AnVIl 20219 217 199 1511 2514 2314 1511 3025 2111 1002 1O1 13 5239 4259 149 113 152 141 2719 3014 5132 3626 19 9 32 1512 1211 1514 139 107 -137 169 1411 207 3719 169 3332 14 7 3210 3625 5032 2111 12412 1514 1059 23i2 30917 32414 2910 2412 37416 3416 2212 4528 3112 28IA 2719 7842 9469 21SC 1748 228 2148 412C 4018 7733 5529 23B 284SC 1649 7135 2314 18412 22416 2010 1548 194H 23410 2112 3048 4122 24410 49435 218 37424 5736 4820 2920 23414 5428 7535 3112 145 158 1914 2216 18410 9524 5824 4924 7532 6830______ 4524 57 20 jELo Tel 33181 yDoie 372449367441 452660 391905 40205j335J 804 3116W 624 391683 1584 B3 32 3828300O7656 452660 399059 372049 3574445 705293469T oRioRS&lOkLI 318 BUAUr J 0 401 BC lUBE TO AOl THE 020 DOLLAR UNDBB 1124 BIZB AL LBZ FOB VACISAGIBII PRICBB FOR ALL DBBIGNB POSTAGI 1040 IBSOIlABCIu ABOUT THOUSAND ADDITIOBAL P11041 eSIABY SIZES 75 CATALOG 0200 SB OBICE LIST ALOUD 91 BY__________________________________ AIR VOBBIOB $3 ____________ eve o e uppy o doorS 1 Pacca0AviOIiofl5 Oest FriendSiOCO 1919""'e 850780 TrOll 8OENUEILEOILOSB OHIO 44102 August 1986 53 BYRON fl TiiwarchrW ORIGINALS uiJ EE~MIMIEV ac 11811 PS 111368 Detailed Info Pack-$200 Full Line Catalog $3OOron Originals Box 279 Ida Grove IA 51445 Ph 7123643165 Turned F-20 Itll pay wait kit release summer F-20 prototypes scaled directly trom Northrops Cad Cam drawings thats just startNorthrops designers have personally provided us latest wing fuselage modifications implemented fall 1985 among reasons F-20 shouldnt confus ed other version youve seen advertised Paris Air Show Colors Byron Originals F20 offers Wood components accurately die-cut lasercut Injection molded plug-in wings ready simple bolt-in retract installation Fiberglass fuselage nose cone detailed panel lines Other kit components include injection molded stabs rudder elevator clear butyl canopy ABS cockpit push rods hinges hardware fuel tank wheels fuel resistant pressure sensitive mylar decals documentation Powered patented Byro-Jet Propulsion System Dont buy fighter future looks like design pastbuy Byron Originals F-20 $29000 $1000 shipping Master Card Visa Welcome
Edition: Model Aviation - 1986/08
Page Numbers: 52, 53
Radio Control Giant Scale Bob Beckman SPARROWHAWK aileron hinges Several times past have published pictures A-scale Curtiss F9C-2 Sparrowhawk have working since Hector pup get lot well-deserved kidding about model time taking get finished Actually its Im such slow builder its matter just working example last time did anything two years ago last January may three years ago havent lost interest project fact Im eager get back finish off before finishes off However seems time turn around something comes up claim time keep working blasted thing reason bring up now still get letters asking questions about specific bits pieces model question keeps coming about aileron hinges somewhat unusual month Ill try answer questions about made made Lets start since have have reason doing something before think about several parts answer first ing wanted reproduce Frise-type ailerons used original alrplane dont know what Frise aileron didnt started Sparrowhawk read next two paragraphs know about skip ahead Most us aware need differ ential throw ailerons An aileron deflected down given distance will produce drag opposite aileron deflected up same distance drag produces yawing moment direction opposite desired turn extreme case could wind up turning left apply right alleron building dif ferential throws aileron linkage make Up aileron travel Down aileron equalize drag components side Frise aileron invented Eng lishman first name have forgotten last name Frise idea seal upper surface Down aileron reduce its drag minimum same time open slot lower surface upper sur face Up aileron thus increasing its effec tiveness drag sounds complicated solution ac tually rather simple involves combination proper shapes leading edge aileron trailing edge aileron bay proper location aileron hinge line hinge line near lower surface well back leading edge aileron deflected down its leading edge re mains close overhanging upper surface wing keeping gap very narrow deflected up leading edge drops down below lower surface airfoil slot opened deflects alrflow lower surface wing onto upper surface aileron sounded great 1930 Curtiss engineers thought just thing new little biplane As turned out Spar rowhawks ailerons still needed significant amount differential Given wanted Frise-type aileron going make hinge Remem ber about eight years ago Yes its long since started Sparrowhawk lot things take granted now werent available doing now would probably use some CB Associ ates strap hinges time ex isted didnt know about needed come up hinge support would ex tend almost two inches rear spar wing take considerable forces could expect large aileron nice things about Giant Scale can often reproduce full-scale way doing something Thats essentially what did case took look Westburg drawings Sparrowhawk include some detail aileron hinge real F9C-2 bolted fitting back rear spar fitting extended through slot leading edge aileron sand wiched between two ribs pivot pin through ribs fitting formed hinge Four assemblies used aileron addition aileron control pushrod tached assemblies final hinge very similar identical full-size alrcraft leading edge aileron lead-filled steel tube acts counterweight tube cut hinge locations allow passage hinge fitting model used brass tube filled solder didnt want weaken lead ing edge cutting designed hinge fitting come down above leading edge fitting cut 0090-in alumi num sheet brackets 0050-in alumi num sheet riveted side Four 2-56 machine screws hold fitting rear spar three pieces fitting carefully control horn hinge L right alieron Bobs still-unfinished Sparrowhawk month teiis hinges disassembied R brackets have riveted support fitting hoies brackets machine screws wiil hold bracket rear wing spar 52 Model Aviation Curtis F9C-2 Spanownuwk InST 500 flaS Deen working longerthan has writing coiumnl wants tell us about alieron hinges month hinge assembied can see far behind aiierons leading edge hinge iine located reiationship pushrod fitting pivot-point hinge line will resuit desired differential throw between ieft right aiierons side R can see access hole ets get screwdriver secure machine screwwhich hoids pushrod pivot pin composite PC-board/foam-core-board sandwich structure aileron rib also obvious view cut assembled hinge pins would wind up right location eight assemblies would match support ribs ailerons made sandwiching cut down Y18-in foam core rib between two full ribs made 5-in epoxy/fiberglass PC board material hinge pins turned brass rod shoul der end hole retaining pin other end retaining pins bent - from A2-in music wire Small nylon shoulder washers side support fitting form actual bearing surface hinge pin point hinges worked out still needed get aileron connected servo Again keep mind before todays Giant Scale accessories available felt typical RC clevis its 2-56 threaded rod would marginal Giant Scale use decided make own wound up nylon fitting shown attached hinge assembly fitting pivots brass shaft held rib flathead screw front fitting drilled tapped 4-40 screw pushrod piece A-in aluminum rod 4-40 threads cut end outcome close arrangement real aircraft will completely enclosed wing completed picture assembled aileron shows everything goes together leading edge aileron spar forward will covered thin sheet aluminum piece 1A-in sjxeet balsa will fit against wing rib stubs alleron bay piece will carved slot contour finally piece thin aluminum sheet rear wing spar back will overhang leading edge aileron provide upper seal reasons went trouble aileron hinges other fit tings Sparrowhawk like doing kind thing time tools materials available Actually modeler Unimat Taig lathe/mill ing machine small power sander could re produce aileron hinges abso lutely necessary ingredient doing things like imagination wouldnt RC modelers didnt have lot imagination Bob Beckman 8248 Holly Grove Cf Manassas VA 22110 responding advertisers mention read about Model Aviation Remember Remember time days gone Longer ago yesteryear sound screaming Dooling sheer music ear Remember creations Dick McCoy Redheads knew nothing win classes Speed thru D ignition cause chagrin Remember Speed dominate Everyone least gave try Using HornetsandBantams OK Cubs search pie sky Now Speed king few Weve lost sight magic pearl Lets return magic days gone everyone gave whirlRemember Lou Roberts OF AUTHENTIC FLYING MODEL PLANS ONLY SMALL ASSORT / MEMO LISTED BELOW BEGULAB IN STOEB Aflm01 PLANS GET OUB FAMOUS BOAT SEBVIC1 AUC LA AltICEIID B SCALlOP VIANSD 4 OP 14 UPGP3 B ABBREVIATED 81312245Z 1/1612 1/8 50 1/ SZ 112 S 0Voaght Core P40 15Coo JN4O Jenny 14BAP BE2B& C 29Waco Taper-Wing 36Wretlod Lyrander 35Doug 0-46A Sheer 29Boe 100 SporE 33StIr Trimotor 10Packard boar 11 39Car P36A FighEr 25Vgi Core 0201/4 38Coo CaLEra PBT2a 19Corlis BC4 17FokIer 57 Ftr 31Boyle GreBr 13Soperoorine SAB 36Gram GolIhOok 35Lock Electra #11 43lear Avenger TBF 42Boo 8170 Fl Fort 38BA Mitchell 825 34Mrcci-CeetoIMC72 37Car Bevy SO3C-S 25CBocer B3C1&2 34Doog Trerep SC-3 33Curt BowS F-BE 32DoOlLEllee GB#11 31Boo P48344 0128 32Spofid BollDog 32Howard Ike&5415e 34Tureen 6W Barer 35How Mo Slalligor 3380 P26A LOW 8 35Silo roe TW 42 OH MeeqaLto Book 37 Steorean VTi 43B81kWidow061 30 TAIlS Hwk Ter13 42 C5B204 Helldivr 36 Ford Trirotr 4A0 31 Bellanca Air Boo 33Graon J2F Dock 27 C Seohawl F7C-1 21 51k Arpkik S38 16 H-Pge 0-400 Book 31 Lirdyr LBlrioe 31 Edo 58 Florie 31 Boner Pete 31 C Sparkok F9C-2 31 Boeing Fir F4B3 30 Turners Peero ST 120 Loeniog C-2 AnVIl 20219 217 199 1511 2514 2314 1511 3025 2111 1002 1O1 13 5239 4259 149 113 152 141 2719 3014 5132 3626 19 9 32 1512 1211 1514 139 107 -137 169 1411 207 3719 169 3332 14 7 3210 3625 5032 2111 12412 1514 1059 23i2 30917 32414 2910 2412 37416 3416 2212 4528 3112 28IA 2719 7842 9469 21SC 1748 228 2148 412C 4018 7733 5529 23B 284SC 1649 7135 2314 18412 22416 2010 1548 194H 23410 2112 3048 4122 24410 49435 218 37424 5736 4820 2920 23414 5428 7535 3112 145 158 1914 2216 18410 9524 5824 4924 7532 6830______ 4524 57 20 jELo Tel 33181 yDoie 372449367441 452660 391905 40205j335J 804 3116W 624 391683 1584 B3 32 3828300O7656 452660 399059 372049 3574445 705293469T oRioRS&lOkLI 318 BUAUr J 0 401 BC lUBE TO AOl THE 020 DOLLAR UNDBB 1124 BIZB AL LBZ FOB VACISAGIBII PRICBB FOR ALL DBBIGNB POSTAGI 1040 IBSOIlABCIu ABOUT THOUSAND ADDITIOBAL P11041 eSIABY SIZES 75 CATALOG 0200 SB OBICE LIST ALOUD 91 BY__________________________________ AIR VOBBIOB $3 ____________ eve o e uppy o doorS 1 Pacca0AviOIiofl5 Oest FriendSiOCO 1919""'e 850780 TrOll 8OENUEILEOILOSB OHIO 44102 August 1986 53 BYRON fl TiiwarchrW ORIGINALS uiJ EE~MIMIEV ac 11811 PS 111368 Detailed Info Pack-$200 Full Line Catalog $3OOron Originals Box 279 Ida Grove IA 51445 Ph 7123643165 Turned F-20 Itll pay wait kit release summer F-20 prototypes scaled directly trom Northrops Cad Cam drawings thats just startNorthrops designers have personally provided us latest wing fuselage modifications implemented fall 1985 among reasons F-20 shouldnt confus ed other version youve seen advertised Paris Air Show Colors Byron Originals F20 offers Wood components accurately die-cut lasercut Injection molded plug-in wings ready simple bolt-in retract installation Fiberglass fuselage nose cone detailed panel lines Other kit components include injection molded stabs rudder elevator clear butyl canopy ABS cockpit push rods hinges hardware fuel tank wheels fuel resistant pressure sensitive mylar decals documentation Powered patented Byro-Jet Propulsion System Dont buy fighter future looks like design pastbuy Byron Originals F-20 $29000 $1000 shipping Master Card Visa Welcome