U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33
Edition: Model Aviation - 1997/10
Page Numbers: 24, 25, 27, 28, 29, 30, 32, 33
U Frank Baker PT-3 standard Army primary trainer late i920s early 1930s Its basic airframe Consolidated PT-i designed Ruben Fleet powered WW surplus Hispano-Suiza engine PT-i became PT-3 engine replaced reliable Wright Whirlwind 15 number small changes made allocated Approved Type Certificate #83 November 1928 PT-i hanging US Air Force Museum Dayton Ohio Experimental Aircraft Association process converting PT-ito PT-3 configuration plans Scale model enlarged very detailed set drawings Joseph Nieto August i950 Model Airplane News CONSTRUCTION Construction PT-3 pretty straightforward number things have done proper order Fuselage sides built over pians just like rubberpowered model area between top bottom longerons firewall station 6 medium hard 3A6 sheet Before joining fuselage sides make gas tank K&S 254 easy tin sheet long strip bent iines overlap soidered bend overlaps front piece soider Drill three 1/s diameter holes lay tank 3A6 piywood firewall mark hoies Solder three 1/ copper tubes gas tank left looking forward goes bottom tank other two vents Soidering back tank place pressure-test tank under water leaks Use epoxy giue maple motor mounts firewall coat front gas tank epoxy push three copper tubes through holes until tank hard against firewail Build front wing strut assembly diameter music wire front strut formers 2a-c center former 2b has cutout wing strut should snug fit music wire Coat both sides 2b epoxy place A6 formers 2a 2c either side Clamp whole assembly used bench vise make sure upper ends wire bottom former horizontal paraliel end result three-layer plywood sandwich wire strut embedded middle layer Place fuseiage sides top-down plans install fonners 3 4 Sc 3A6 square cross-pieces former 6 position Use carpenters square ensure sides vertical front fusciage square dry remove plans glue firewali assembly make cuts sides top bottom longerons former 6 just deep enough tail ends fuselage can glued Glue top bottom cross pieces formers 5b-9 instail stringers Aiso glue triangle pieces fuselage sides ends top bottom cross pieces station 6 Install servo rails 3A2 piywood aileron piate making sure fit particular servos sure aileron servo arm wheel does extend below bottom line fuselage Slide engine servo instail nylon tube 24 Model Aviation rottle-control cable sure align forward stick full throttle Glue front wing strut assembly 2a-c sure ends struts parallel top fuselage perpendicular centerline alignment critical check several times Glue former 3a place 3A6 square stringer Install /16 balsa sheet between firewall former 2a well between 2c 3a Cover top fuselage firewall former 3a 3A2 sheet balsa Build removable cockpit assembly leaving small gap between formers 3a 3b assembly will lift off easily Sheet whole thing /2 balsa cut out cockpit boles dry far can go fuselage point whole bottom fuselage firewall former 5c should open Epoxy balsa blocks front firewall carve shape Soak inside blocks engine mounts slowdrying epoxy use heat gun get very liquid soaks wood really seals against fuel Wings The top bottom wings same except October 1997 25 PT-S Type RC Sport Wingspan 50 inches Engine OS 20/26 four-stroke Functions Elevator rudder throttle ailerons Construction Built-up Covering/finish Heat-shrink film OS 20/26 four-stroke engine replica installed Wood screws hold place version 1920s-1930s trainer based Jospeh Nieto drawings August 1950 ModelAirplane News Cockpit area showing rear wing strut servo railsFuselage bottom showing landing gear aileron servo hatch rails Engine compartment engine mounting beamsRear fuselage construction stringers Lower wing strut fittings aileron control cable tubingExample aileron control tubing exits lower wing October1997 27 cutouts fuselage bottom wing has nylon tubes cables drive ailerons wing spars laminated 1/8 X ce balsa core square front spars 1/8 x building lower wing install glue ribs adjacent fuselage may need adjust later Note bottom aileron piece 1A6 sheet balsa Use small plane trim two balsa false spars ailerons match contour ribs Once basic wings complete cut appropriate dihedral breaks Glue plywood dihedral braces Fabricate 015 aluminum wing strut brackets bend according diagram plan Place piece /16 plywood open gap use drill press drill /32 bolt hole Use triangular file make two small notches side horizontal legs both sides brackets will held onto wing spars short pieces copper wire wrap around spar bracket twisted together inside wing Clip ends leaving about 2-3 turns fold down ends sure place proper bracket correct place Glue 1A6 balsa sheet around bracket will used anchor covering Install hinges wing ailerons use removable pin such Klett ailerons can covered easily Glue A6 balsa plates bottom wing aileron push cables like use Hobby Lobby bulk pack #HLH 805 nylon tube cable Unfortunately comes rolled up Cut nylon tube few inches longer will needed insert /i6 length music wire Use heat gun get tube hot around let cool Remove wire tube should reasonably straight repeat heating process careful melt tube Use 9/64 drill bit cut holes bottom wing ribs cable holes last two ribs before bottom plate should above front spar tube exits through balsa plate angle As approach ribs make holes little bit higher rib smooth path Bolt aileron horns A6 plywood plate aileron install ailerons Run cable through nylon tube tape end outer end aileron horn just get angle tube correct Once aligned use clear silicon RTV glue nylon tube place Completing Fuselage four components landing gear will fabricated next sure bend landing gear wires points indicated plans proper direction Use some pincher clothespins roughly assemble wires plywood parts Place components fuselage bends correct thing will hook up properly Use laminating process described front wing strut epoxy plywood music wire together Slide plywood sandwich fuselage check match wires can rebend bit clamping plywood sandwiches vise bending wire Make rear wing strut assembly using same technique old Free Flight technique incredibly strong Cut rectangular slots bottom fuselage lower wing spars aileron control nylon tube Slip lower wing check alignment 11/20 incidence Use carpenter s square check leading edges wing perpendicular fuselage sides have trim slots glue shims fuselage get proper alignment Glue lower wing butt ribs leaving about 1A2 clearance fuselage point have make major decision glue glue building original covered lower wing fuselage sides before glued lower wing prevents oil getting butt ribs fuselage sides Glue wing fuselage using slow-drying glue have time check alignment incidence again Now landing gear can installed Glue rear landing gear strut sandwich front wing spar fuselage clamp place Check see airplane sits level axles perpendicular fuselage centerline Glue front landing gear strut assembly firewall forms third member sandwich glue dry bend ends front strut matches rear strut Epoxy rear landing gear cage assembly front rear landing gear sandwich Glue front landing gear cage sandwich goes well cage wires should meet 28 Model Aviation er construction Ribs /ie x balsaStabilizer-elevator construction Joiner %i music wire Rear view replica engine showing cutout OS 20/26 --S----R~-F---i--q-j 5Ii IRoFOSSiIARRR0W~UPPERWINGPLANN --_____flOROF3fr -o IILOWERPLANI0RRR AROI\ WINGIIh\ i 4---I ORRARAVSF\- 0ARR2_ __ LiFDIHEDRAL BRACE LOWER WING-ASIRES BRACE UPPER WINGR1S LII RIB TEMPLATES[VC-V 1IAORfF1AReRSA RWARD ADIOS ICR000C BALSAoo P34FRBRACE FEBAVIPFUSF9 PA OR OFFATREARRIBLSOOJ06 CPRF5 -~pcF5A-4 12f-Z3132 00 SO CI ES COREFOO SF00122 IRERRARASCAEl0005 SOREEl -~f AlL EUSAROB COBB Li ROLlSSEER SERFOF FAR IOaRWS35050I /1_ ASARELFORISSEEI15 00 0/ORR AROSIOFRA RE FOROSSSRROBASA 055A F CROSSARARCO 05FFOOSAPUSELAGESIDE VIEWABSABASSROEROQLORESRF F0BF0ROAEASFFO,S.FRELF MARRR REAR IS SAREFASERAo--., - BR ASAfR~/ I71I- Th fj -SUERAFFORBUtBORSBBAOR- S.1 LANSING GEAR PATTERNS /1G1O/ RCRAFF E _ IFUEL TANK PATTERNL U MOUNTSL O A ROFF A55SIIREFRAC 303 STABILIZER 2 -OCR -T EOFAROJi -U- ELEVATOR ii OUTER WING STRUTS MODELAVIATION CONSOLIDATESPT-S AESIWEER BR P32W B BAREB DRAW RB FRABE B BRRFR BRED ELAN BR JRR ARAROW 0 0-PTE3 B FRANK BAKER 0 77 Fly Best Less SW-5OK 60cc 37ci x 56 hp est its class Long stroke high torque Props 22x10 22x12 24x10 Light weight 44 lbs Built-in motor mount Easy starting year warranty Designed airplanes blowers chainsaws 3W Modollmotoren world leader t Scale Motors current TOG Champion Call info complete line motors 24cc 240cc single four cylinders Exclusive US Representative 3W Modeilmotoren Desert Aircraft PO Box 18038 TucsonArizona 85731 Phone/FAX 520 722 0607 V Bind copper wire solder Bend ends front cage wires match rear landing gear leg Use copper wire bind front landing gear wire front landing gear cage wire rear landing gear strut solder whole works Glue piece 1A6 plywood under fuel tank another top front two landing gear sandwiches battery pack should fit between Close bottom fuselage between firewall rear landing gear cage sandwich 3A6 sheet Glue 1A x spruce frame aileron hatch close bottom fuselage hatch frame former Sc 1A balsa Make aileron hatch cover /i6 plywood hold place four small wood screws Installing upper wing Cut plywood parts upper ends wing struts making sure wire fits snugly slots Note upper wing dihedral braces form third member plywood sandwich Cut away enough ribs sandwiches can slide clamp upper wing front wing strut using plywood parts use glue Insert rear wing strut assembly fuselage Cut away ribs clamp upper wing rear strut Use incidence meter check incidence upper wing glue rear wing strut sandwich two Lite Ply doublers fuselage Before glue dries check leading edge top wing parallel bottom wing Adjust rear wing strut sandwich until wings parallel wait glue dry Remove clamps upper wing use slow-drying epoxy fabricate four wing strut sandwiches Slide top wing back onto sandwiches try get bottoms sandwiches bottoms spars Clamp sandwiches spars Check make sure leading edge top wing parallel lower wing check see same distance between upper lower wingtips left right sides Some judicious loosening clamps can used get proper settings everything dry install 12 music wire diagonals between struts bind copper wire solder Empennage rudder elevator built flat over plans ribs 1/16 x need cut 1A6 x center end rib take trailing edge airfoil shape sanded afterwards elevator halves joined 3A2 piece music wire Note leading edge vertical fin fits hole a sheet center stabilizer Once stabilizer glued fuselage use round file router scallop formers between upper fuselage stringers upper fuselage covered oaly stringers should touch covering Replica Engine plastic kit Wright J5 Whirlwind engine assembled basis engine replica However could built up using Williams Bros 1 -inch-scale J5 cylinders After assembly top cylinder omitted back crankcase cut away match engine mounts Cut hole front crankcase allow prop shaft driver come through Install 0S 20/26 engine make sure plastic engine will slip over model engine should plenty prop clearance back plastic engine should against front balsa blocks Cover 0S s crankcase clear kitchen wrap Mix up about three ounces auto body filler fill sides bottom plastic engine slip plastic engine over model engine make sure straight hold until body filler hardens Remove plastic engine cut away excess filler couple small wood screws can used hold replica engine place Covering Use choice iron-on heatshrink film wings empennage bright yellow fuselage olive drab Compare other 60cc engine 3 crankshaft bearings Electronic auto-advance ignition system HANDS ON PRO-BOW THIS UNIQUE DE VICE ALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EQUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4999 WORKS DIRECTLY OFF OF 12 VOLT BATTERY DR 10 AMP BATTERY CHARGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIOUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 50 PAGE CATALOG VISA & MASTER CARD ACCEPTEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 725% TAX WING MFG306 ESIMMONSGALESBUAG IL 61401 http//wwwwingmfgcomCALL 309-342-3009 painted balsa blocks forward firewall olive drab dope national insignia appearing top upper wing bottom lower wing cut trim film large white numbers red white blue strips rudder also trim film small white words numbers fuselage sides 3A press-on vinyl letters bookstore pilots Williams Bros 1 scale sportsman pilots painted plastic model paints Make helmets jackets dark brown originally used 35A Williams Bros Golden Age wheels replaced three-inch wire-spoke wheelsI could resist looks Flying Scale models old biplanes size perfect match 05 20/26 four-stroke engines sound reminds radial engine As fourstroke engines set needle valve engine running smoothly screaming best propeller have found engine-airplane combination Master Airscrew 9 x 6 Reset exhaust pipe points up about 450 angle will aim oil away fuselage keep airplane very clean after day flying control sm-face throws ailerons inch up 3A down elevator 1 inch up down rudder inch right inch left Takeoff straightforward little no rudder input Once airborne reduce throttle until model looks like just loafing along PT-3 will large lazy loops open slow-rolls wingovers spins four-stroke engine will throffle down point propeller just ticking over As result great fun just fly around pattern throttle far back can make touch-and-gos Without much effort can just roll wheels grass feed little throttle go back up have found rigid landing gear models type actually make landings easier smoother k Baker 5301 Burnett Dr Madison WI 53705 October1997 33