U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT
Edition: Model Aviation - 1994/04
Page Numbers: 25, 26, 27, 28, 29, 31, 33, 34
U Bill Winter John Hunton Akro Batbased design extends performance envelope RC sport models 7 aptor has exceptional low-end performance Cloud Niner RC Special designed extend top end performance envelope Raptor different appearance performance usual airplanes have designed published Raptor moved couple notches up performance ladder although can still fly sedately partial flaps wished maintain smoothly flowing blend responses adequate stability visual dihedral bank-and-turn characteristics please lightplane pilot Raptor has very wide speed range fast enough please sport pilot wants bore holes yet has landed flaps two-foot roll near calm conditions after prolonged STOL approach would have see believe design aerodynamically compact minimized moments around axes achieved through its double-tapered shoulder wing high thrustline large short-coupled empennage April 1994 25 ~NH] A-~ .Ai -, L- 4 T~fVv* Q S. 4- Lv 1t 4 44 Short-coupled model has large effective tail surfaces Design based Akro Bat April 1991 MA CL model Its NACA 00-series airfoil varies thickness root tip incidence decalage set up minimize drag tail-dragging washout good stall stability though Raptor designed fly just side neutral stability will fly hands-off Raptor provides perfect transition typical trainer flown moderate throttle no flaps Raptor flies just like typical trainer yet easier fly stall-safe wing design guts advance steeper climb higher velocities inverted flight verticality maneuvers flaps however other windows open up Raptor world close-in flight opens up.tight maneuvers quick turns unbelievably quick takeoffs tippy-toe landings also means capability climb altitude idle slow down sniff thermals Raptor provides widest range have ever seen sport model CONSTRUCTION Wing Each panel has aerodynamic twist washout greatly improves stall characteristics feature makes panels flaps non-interchangeable Duplicate rib sections copier Spray backs copies 3M adhesive apply selected rib balsa Partially precut ribs stations 0 1 facilitate later removal area between main spars Tape wing plan down over building board cover waxed paper Fasten top up trailing edge jacks place wing stations 1 4 7 10 Pin bottom spar down sides spar doubler area glue bottom spar doubler Mount trailing edge onto jacks Slip ribs place centering trailing edge Tilt root rib shown dihedral Glue sub assembly Pin leading edge place Check ribs proper fit trim necessary glue LE Install top stub spar top spar rear spar trailing edge sheet Fit top D-tube sheet leading edge Mark trim rear sheet 1/ short rear spar provide shelf cap strips land Wet outer surface LE sheet glue applying Titebond ribs cyanoacrylate glue CyA leading edge joint Remove top up trailing edge jacks install bottom up jacks accommodate aforementioned washout Pin wing panel back down board bottom up Install spar webbing trailing edge sheet bottom leading edge sheet steps complete D-tube gives wing panel its torsional rigidity Install rear stub spar flap well sheeting center section sheeting Add hold-down screw reinforcing stub ribs form front wing cutout After wing panels complete cut out center sections ribs stations 0 1 wing joiner laminated 1/g plywood use Lite Ply trimmed shape bandsaw Use generous amount epoxy mate panels joiner Run medium-weight glass cloth over center section Wick down CyA coat epoxy Sand wing panels final shape long sanding block Cut out aileron sand shape Cut fit flap panels flap wells Use firm sheeting flap Fuselage Select matched wood facilitate equal bending sides Underlay plan selected side sheet Go over salient features serrated dressmakers wheel Use straightedge run wheel along insure trueness can Prepare sheet doublers same way Unless have ordered 48-inch sheets sides will have make side sheet extensions tapered joints rear fuselage Glue nose doublers side sheet Use cooled CyA retard setting glue use aliphatic resin Titebond dots CyA quick adhesion Select strongest re wood have longerons verticals can softer wood particularly aft areas Use hardwood RC tray supports Position plywood formers onto fuselage side end wing mounting area Use small drafting triangle align parts vertically glue parts place Attach other side subassembly being careful accurately align sides Add triangular parts behind front former balsa gussets behind rear former fuel tank compartment accessible through hole front wing box fonner fuel tank must no two inches wide Hayes eight-ounce tank meets specification Drill landing gear mounting plate 6-32 blind nuts Recheck fuselage squareness install plate Install lateral spreaders top bottom wing box area Lay partially assembled fuselage over top view Pull fuselage sides together tail match up pin clamp clothespins Check 26 Model Aviation ors wing nose tail cone have straight tapers focus toward models center gravity Right Prototype wing individual panels allow dihedral adjustments initial setting fine vertical alignment tail glue sides together Install lateral spreaders Lay block across horizontal stabilizer seat check seat true level fuselage bottom landing gear support plate thereby wing mount area Install doubler provides lateral support fin leading edge Sand fuselage top bottom block provide level surfaces Cover top grain running across fuselage bottom grain running fore aft Add plywood tail wheel mounting plate balsa tail fairing prototype designed around YS 45 concealed muffler concealed muffler setup difficult build may wish bother drag-reducing feature although looks clean Any 40 50 two-stroke can used normal side muffler nose designed spinner centered though engine provided two degrees right thrust results engine mounts being offset firewall centerline Determine geometry particular enginel muffler combinationin particular distance spinner backplate firewall rear engine mount amount offset mounts will vary can interpolated following relationships /s offset 4 inches /32 offset 5 inches 3A6 offset 6 inches Depth firewall placement will also depend engines geometry laying out firewall mark reference centerline Cut firewall proper depth width Drill engine mounts fuel lines throttle linkage assemble engine/engine mount combination fasten subassembly firewall 6-32 blind nuts Tack-glue firewall place using centerline references sides nose proper centering information Trim sides final length nose install nose ring former Use spinner backplate reference center accurately shaft Use hard triangular balsa firewall backing top bottom triangular fuel tank compartment parts Use soft balsa installation triangular parts around engine compartment Trim parts facilitate engine removal may also want remove part nose ring same purpose Smooth interior engine compartment add fuel tank floor buffers front rear wing mount area Tack-glue top bottom nose blocks place shaping nose tail surfaces rounding generated areas remain perfectly April 1994 27 Tail surfaces squared up sanding block end work surface Tight joints must Wing built trailing edge above work surface Built-in washout improves Raptors stall charcteristics Above Split flap shown partially deployed Flaps shorten landing profile allow flying small fields Airtronics radio equipment used prototype Note remote switch setup Raptor photos Bernie Stuecker square front wing mount landing gear mount areas Shape nose temporarily installed spinner shaping top block leave high wing juncture After final mounting wing sand area mate wing round too heavily engine area avoid exposing left top engine mount Remove nose blocks hollow remove excess weight Fuelproof engine compartment Permanently install nose blocks Empennage Two important considerations lightness accurate fit parts tail has very large lever arm advantage over nose excess weight tail approximately three times excess weight will required nose achieve proper balance way keep tail light yet strong select wood properly Maximum strength required root surfaces good strength also required leading edges Crossmembers control surfaces can softer lighter wood Light control surfaces will also reduce possibility flutter Cut parts /16 longer marks Use end building board guide sanding block hang parts slightly over edge sand final length angle method ensures accurate vertical angle hesitate throw part away make another inaccurate too short Cut pin parts place being sure have good tight fit connections Most shaping sanding should done sanding block best accuracy Dont make trailing edge too sharp keep sufficient material maintain good trailing edge strength best have wing mounted fuselage first can used reference align horizontal stabilizer Bare mating surfaces wood apply epoxy both surfaces mount stab Sight stab tips wing adjust make level After stab bedding has cured epoxy fin place using triangle reference verticality stabilizer Drill elevator rudder horns Miscellaneous parts Wheel pants made plywood backbone soft balsa fairings Cut parts outline bandsaw jigsaw sand out inside wheel well surface drum 28 Model Aviation 5 reliable power source Note provision made optional vertical rear silencerhelps streamline nose Fuselage empennage no difficult build typical trainer Round nose aft fuselage Bill Winter Raptor under construction Design pushes sport performance toward its limit sander before assembly Coat joining parts aliphatic resin glue clamp together tightly Use scrap plywood pressure plates side buildup Sand shape Smooth clean Klett landing gear Scotchbrite before painting canopy parts assembled removable balsa base Build up base mate wing seat good match Sig Easy Hinges used throughout Prebend hinges insure sufficient flexibility Slit balsa X-Acto install hinges CyA Align hinge axes accurately smooth operation Finish During construction occurrence CyA aliphatic glues outside balsa surfaces should minimized smooth evenly sandable surfaces Use aluminum oxide paper coarse shaping medium smoothing fine finishing Use Elmers carpenters wood filler small imperfections Vacuum blow-off entire model thoroughly before covering Coverites 21st Century spray paints used difficult surfaces such wheel pants landing gear gear mount plate cockpit parts inside engine compartment Prime areas well use masking tape keep paint off surfaces covered film Coverite has excellent videotape available shows good tips covering 21st Century films gist closely follow temperature directions covering information sheet sure apply film under tension directions generous excess material grab pull across surfacespull tight will stay tight Seal film edges subject fuel oil Balsarite wipe off excess thinner sure use contrasting colors trim top bottom quick identification during flight first test flight series went perfectly no pitch trim required Raptor has balanced feel axes During first flights model has jointed wing removable stub spar dihedral refinements very slightly positive stability produced designed seemed satisfy us YS 45 no pipe smooth reliable power yours asking custom concealed exhaust silencer very effective does rob power Climb can made over 45 degrees course good 40 50 can used side muffler generous washout flaps extended adding improvement stall propagation characteristics model can flown right down stall burble porpoise occurs just add tad power Raptor will drop wing will have understand use flaps before will fully satisfied Raptor flaps large very effective Never pop speedthe model might loop frequent complaint about flaps trim changes applied necessarily true factor velocity As velocity reduced more up elevator required maintain level flight addition proportional flaps will eliminate need up elevator slowing down During flight test series experimenting flaps got very slow level flight reduced power idle model began slow steep descent could resist continuing right down runway Raptor still enough lift flare model sat down two-foot roll Later tests included high-speed runs happened occur very gusty day surprising benefit near-neutral stability Raptor s ability fly wind course can penetrate interesting thing was affected gusts like other models flying considerable trouble day l 1994 29 Type RCsport Wingspan 59 inches Engine 40-50 Number RC chanels 4 5 flaps Flying weight 7 pounds Construction Built-up Covering/finish Coverite 21st Century paint/film WHEN YOURE READY FOR 4CYCLES YOURE READY FOR SAITO Chances scale model youre building now ought have multi-cylinder engine time go out Put scale engine looks like real thing Sounds like real thing delivers some really incredible performance other words get Saito J-3 fans will crave beautiful FA-BOT Swinging 1 2x6 about 8500 its power sound will make J-3 hit field new powerhouse FA-lOOT swings APC 14x6 nearly 10000 rpm giving enough zest 90 4-cycle size model fabulous FA-13OTD shown left will really make Goldberg kit Ultimate Extra live up its name really big planes theres really big Saito FA-300T Made both single plug dual plug/pumped versions 300T puts out nearly 5 horsepower swinging 18 20-inch props Two cylinders arent enough Look radial FA-325R5D transform Byron Wildcat Proctor Nieuport mere model heart-thumping show stopper Its time owned Saito See local hobby shop today Ex usveyDst bu ed Ho zon Hobbyos bu n Champagn L6 821 2173559511 IUB 015 ORILL FOR SVS SHEET METAL SCREWS_____________________________________ COSTIWIOAS S S OSAROWOOS S/IS SOFTELEVATORBALSA T ESUE BALSAELEHAYOR SLS RELSA SHEET LB BALSA SHEETPAISTES REARHIS___ 5 ELY STBIER/UMMALSAI CANOPY / HATCH DETAIL LW ALSO SHEET RUD 110 BALSASISHEBALSA MUFFLER CHRICEALER MUFFLER FORCl VS AS ESSISE AHAIL 5MB ______CD ____-o ___ ___RAPTOR _____ _____Co 55E SES-2ELEVATOR CERSOFHSjy4ZjeZSOAMER~ ___I-i- J-______ ZiELU-L- -ASSEAMY WETS OS OH SSYALLATHNlIlA HIA WHEEL W 711 SYOCA EXPOSESUASH BALSA SPLICE 352 BALSA HFFSEY WINGSADDLE DOUBLER ____________________ -- S H SLOTCHS HUT SHOWS DEL AVIATIONCD F-I-ESHISEBOTTOMWA BALSA SHEETIC BALSA WORET MARE PTORCD OESIASEO RH WILLIAM V MISTER CROWS BY 3555 5 RUSYOS NOSE BOTTOM -SATE RR IS SPORT RUE MOSELISSEE FLOSS BR JOE RERARCO ALTERNATE ENGINE INSTAL DETAILVIEWS-SIR RIO WILLIAMSTOP B BOTTOM NOSE DOUBLERSROB 5O TWR CYCLE ESSISELEHORAM HEAR Co CD 0 0 NO OCR TEXT