Pcr Perky solution problem becoming altogether too common Traditionally RC models flown club fields structured regimented fashion typically fields located considerable drive home Meanwhile numerous small local fields evident could accommodate small light model non-threatening nature Dav Rob len August1994 33 Pcry twist starter spring Perky ready go Duct-tape turbulator added improve slowflight handling Perky designed make use smaller fields totally compromising quality its basic flight characteristics Perky must also handle breezy weather seems type have am advocating flying models banned areas failing way conform AMA safety code am suggesting using small light lowpowered model us could find some convenient local site keep skills honed between trips regular club field Although have number miniature RC projects past seemed meet requirements major compromises led decision create fresh design retaining best qualities past projects expanding performance personal preference speedy maneuverable craft however wanted able share Perky young kids well capable gentle stable hands-off flight typical trainer As began planning stages Perky quick check hobby advertisements showed Cox still offering cute little 010 engine Bill Cannon producing Super-Micro RC system products formed basis sizing new project combined produce smallest lightest equipment package currently available minimum all-up weight going pretty much set choice equipment engine appeared between 41/2 5 ounces depending final selection construction finishing materials Based previous experience decided twochannel control being completely adequate provide desired maneuverability keeping weight minimum next decision area wing requirement minimum flying speed 15 mph coupled projected weight tended place wing area about 80 square inches used clean airfoil nonnal lift capability choice best airfoil major design challenge top speed along maneuvering qualities would both strongly affected final selection literature search turned up some outstanding work done Princeton University Selig Donovan et al dealing mainly airfoils RC sailplanes Among sections studied venerable Clark Y appeared have superior performance small low-speed wings However data did extend down minimum values calculated Perky some uncertainty about minimum speed high-lift maneuvers Regardless small problem Clark Y chosen based available data actual layout shape Perky combines effort retain connection vintage styles using minimum amount material choice highwing cabin style strongly influenced desire ease handling experience has taught rudder elevator control would quite adequate desired maneuvers materials chosen construction finish include cyanoacrylate CyA adhesives Super MonoKote covering structure good old balsa dab plywood Jam probably oldfashioned narrow-minded chose use kind modem composite materials seen widely todayI used KISS principle Keep Simple Stupid instead maintain pure airfoil shape provide extreme damage resistance wing fully sheeted Although slight weight penalty some flying site options justify choice size tail surfaces force arrangement follow standard practices established previous designs rather short nose dictated weight engine relative rest model Construction Perky went very quickly once decisions reached finished procrastinating final weight 475 ounces equipment including 75 mAh battery Once Perky finished weather decided play roughwind rain cold long week Finally day came wind dropped 10-15 mph oniy moderate gusts initial flights chose use stock 3 x 125 prop Cox racing fuel immediately obvious top speed would adequate around 50 mph engine running full speed aerobatic capability outstanding well performing consecutive loops rolls stall turns snap rolls spins much third flight point Perky well established performance machine gliding performance less desired slow flight required too much effort controls Going back scientific literature seemed laminar separation bubble forming top Perkys wing 25 mph below fix condition involved fastening turbulator strip wing upper surface no rigid guidelines treatment used cut fly approach final result narrow strip duct tape 5% back leading edge fix place Perky delight fly flown reasonably slowly nineyear-old son Paul can handle Perky just fine glide dramatically improved Perky handles like much larger machine turbulator installed Being purist heart realized might possible expand performance Perky careful propeller matching problem limited choice commercial props just Since enjoy carving prop guidelines well established decided carve few alternate choices maple results gratifying example 375 x 10 prop substantially improved climb clipping little off top speed 325 x 125 34 Model Aviation e increased top speed noticeably improved some maneuvers Please aware possible permanently damage Cox 010 just lean run too much prop load Proceed very carefully experiments though Perky very easy fly would encourage beginner attempt first project very close tolerances involved construction alignment some experienced judgement required during early flights trimming best performance Provided comfortable two-channel 049 projects market Perky should no problem CONSTRUCTION Because success model project depends materials used am going mention brand names worked well Obviously others would just fine Balsa plywood Sig Mfg Co CyA glue products Carl Goldberg Models Jet Super Jet Covering material Super MonoKote Perky requires small amount wood really worth effort select best job wing should constructed 5-6 lb density A-graln wood tip blocks should cut very lightest wood available hollowed out possible tall surfaces should cut l0-lb-density C-grain Fuselage material should generally C grain 8-10 lb density Wing prefer cut parts component like wing before assembly care wing skins can cut 36-inch stock little waste used three-inch-wide stock spliced skins before assembly required width remaining /16 material should used wing ribs stripped leading trailing edge 8 lb stock metal straightedge Its big help sand skins smooth before assembly Use 150-grit sandpaper block task Begin wing assembly pinning bottom skins flat work board Yr shim strip needed under front form airfoil Glue trailing edge strips place add ribs Note center rib tilted slighfly match dihedral angle prefer Super Jet glue general assembly work Carefully fit glue leading edge strips place Dry-fit top skins carefully before bonding satisfied glue ribs trailing edges prefer make bond leading edge thin Jet glue best penetration dry lift panels work surface trim excess material edges Attach tip blocks finish panels contour smoothness Take care match leading edge shape shown Join panels Super Jet being sure match dihedral angle Additional bracing unnecessary finished uncovered wing should weigh e less Fuselage Cut parts material specified making sure cut openings fuselage sides time Glue 1/g strips two sides cabin area along A6 reinforcing strip top edge side assemblies joined first cabin 1/8 crosspieces pulled together tail Please work over top view avoid building banana firewall should fined 2-56 blind nuts glued placewatch warps did use extra bracing firewall little glue fillet would August1994 35 Fuselage tail surfaces medium-weight C-grain balsa Cut parts prior beginning construction Perkys wing fully sheeted toughness various flying sites fuselage simple sheet box Perkys small size plenty room shift radio equipment until proper balance achieved Author carved several maple props successful attempt increase performance over standard Cox prop see text Control horns %2 plywood hinges thin mylar pushrod ends 1/32 music wire Note antenna routing Full-Size Plans AvailableSee Page 168 BALOATR 7A-Afll/IB1/F 6/SB FUWOOD TRIM PROP FROM COOS/SAS MROOFSAIMIPSFROB/BRI/4BALSA000010 OTOBAOTICC.1--,./ASoo0110 1112 SIRe BROS RATIOSY I 10/COlT 6SWOON IFLOIL/SAR BlOBS ITS BALSA NAB BASROC IllS BRASS TILBIRA 1/32 PLY 0000 IIS CIIzrz SO SCALEDESISIES BTOAVERORELEN 56002ALL ROOTS 1/11 PLYWOOOoo . RONONRAM 00ORIONT SN/ARC Ili11 order Cover top bottom 1/32 sheet grain running crosswise after installing plywood landing gear mount pieces Sand smooth over set aside Tail surfaces Cut parts C-grain 8 lb balsa Fashion elevator joiner wire attach elevators Sand parts smooth prepare covering Covering Perky should covered components still separate As mentioned use Super MonoKote work care avoid warping damaging delicate tail surfaces Some colors weigh less others used opaque red transparent yellow Assembly Cut install plywood control horns tail surfaces used thin mylar drafting stock about 006 hinges cut /8-inch width fastened thin Jet Check drafting supply store material Check smooth operation before proceeding make corrections needed Glue horizontal tail place using wing mounted cabin check alignment Install vertical tail now add bottom hinge Mount tailskid back used 46 dowels wing hold-downs held place Super Jet landing gear completed fitting prebent wire legs fuselage adding 020 wire clamps Attach everything together thin Jet no really suitable wheels project made set result very light tough smooth-running wheel Starting thin plywood disk cut size bonded short piece brass tubing center cut tire electrical insulation split glued around outer edge Soak wheels thin Jet coat fuelproof paint really durable result engine fastened nose 2-56 screws just long enough reach blind nut longer could result damage battery Check engine thrustline angles should no down side thrust Install radio equipment loosely strap wing center gravity CG check vital balance Perky designated locationmove equipment achieve condition note location components Mount servos servo mounting tape fit piece stiff sponge between vibration damping Make up pushrods 3/33 square balsa 1/3 music wire use tiny dab epoxy trap rods control horns Set control throws follows rudder /6 left right center elevator /s up down Mount battery receiver using soft sponge rubber foam Make sure cannot touch anything solid route antenna out tail Let excess antenna trail behinddont tempted cut off coil up extra result would loss control Preflight Perky performing range check per equipment instructions final alignment check flat surface kitchen counter Mount Cox 30 x 125 prop backwards flaish whatever engine check runs need ensure reliable operation possible choose soft grassy site first flights engine running slightly rich toss Perky wind about /2 tank fuel aboard Spend first few flights checking out feel model learning glide performance Just like space shuttle get try point its up make fine adjustments normal get model Since anything can improved would glad hear comments feedback regarding Perky odel Aviation BORI I/lB BALSA 1/ISaiSRROROTIOSSON I/SB BAASA Type RO Sport Wingspan 20 inches Engine size/type Tee Dee 010 Number channels Two Flying weight 475 ounces Construction Balsa sheet Covering/finish Transparent MonoKote
Edition: Model Aviation - 1994/08
Page Numbers: 33, 34, 35, 36
Pcr Perky solution problem becoming altogether too common Traditionally RC models flown club fields structured regimented fashion typically fields located considerable drive home Meanwhile numerous small local fields evident could accommodate small light model non-threatening nature Dav Rob len August1994 33 Pcry twist starter spring Perky ready go Duct-tape turbulator added improve slowflight handling Perky designed make use smaller fields totally compromising quality its basic flight characteristics Perky must also handle breezy weather seems type have am advocating flying models banned areas failing way conform AMA safety code am suggesting using small light lowpowered model us could find some convenient local site keep skills honed between trips regular club field Although have number miniature RC projects past seemed meet requirements major compromises led decision create fresh design retaining best qualities past projects expanding performance personal preference speedy maneuverable craft however wanted able share Perky young kids well capable gentle stable hands-off flight typical trainer As began planning stages Perky quick check hobby advertisements showed Cox still offering cute little 010 engine Bill Cannon producing Super-Micro RC system products formed basis sizing new project combined produce smallest lightest equipment package currently available minimum all-up weight going pretty much set choice equipment engine appeared between 41/2 5 ounces depending final selection construction finishing materials Based previous experience decided twochannel control being completely adequate provide desired maneuverability keeping weight minimum next decision area wing requirement minimum flying speed 15 mph coupled projected weight tended place wing area about 80 square inches used clean airfoil nonnal lift capability choice best airfoil major design challenge top speed along maneuvering qualities would both strongly affected final selection literature search turned up some outstanding work done Princeton University Selig Donovan et al dealing mainly airfoils RC sailplanes Among sections studied venerable Clark Y appeared have superior performance small low-speed wings However data did extend down minimum values calculated Perky some uncertainty about minimum speed high-lift maneuvers Regardless small problem Clark Y chosen based available data actual layout shape Perky combines effort retain connection vintage styles using minimum amount material choice highwing cabin style strongly influenced desire ease handling experience has taught rudder elevator control would quite adequate desired maneuvers materials chosen construction finish include cyanoacrylate CyA adhesives Super MonoKote covering structure good old balsa dab plywood Jam probably oldfashioned narrow-minded chose use kind modem composite materials seen widely todayI used KISS principle Keep Simple Stupid instead maintain pure airfoil shape provide extreme damage resistance wing fully sheeted Although slight weight penalty some flying site options justify choice size tail surfaces force arrangement follow standard practices established previous designs rather short nose dictated weight engine relative rest model Construction Perky went very quickly once decisions reached finished procrastinating final weight 475 ounces equipment including 75 mAh battery Once Perky finished weather decided play roughwind rain cold long week Finally day came wind dropped 10-15 mph oniy moderate gusts initial flights chose use stock 3 x 125 prop Cox racing fuel immediately obvious top speed would adequate around 50 mph engine running full speed aerobatic capability outstanding well performing consecutive loops rolls stall turns snap rolls spins much third flight point Perky well established performance machine gliding performance less desired slow flight required too much effort controls Going back scientific literature seemed laminar separation bubble forming top Perkys wing 25 mph below fix condition involved fastening turbulator strip wing upper surface no rigid guidelines treatment used cut fly approach final result narrow strip duct tape 5% back leading edge fix place Perky delight fly flown reasonably slowly nineyear-old son Paul can handle Perky just fine glide dramatically improved Perky handles like much larger machine turbulator installed Being purist heart realized might possible expand performance Perky careful propeller matching problem limited choice commercial props just Since enjoy carving prop guidelines well established decided carve few alternate choices maple results gratifying example 375 x 10 prop substantially improved climb clipping little off top speed 325 x 125 34 Model Aviation e increased top speed noticeably improved some maneuvers Please aware possible permanently damage Cox 010 just lean run too much prop load Proceed very carefully experiments though Perky very easy fly would encourage beginner attempt first project very close tolerances involved construction alignment some experienced judgement required during early flights trimming best performance Provided comfortable two-channel 049 projects market Perky should no problem CONSTRUCTION Because success model project depends materials used am going mention brand names worked well Obviously others would just fine Balsa plywood Sig Mfg Co CyA glue products Carl Goldberg Models Jet Super Jet Covering material Super MonoKote Perky requires small amount wood really worth effort select best job wing should constructed 5-6 lb density A-graln wood tip blocks should cut very lightest wood available hollowed out possible tall surfaces should cut l0-lb-density C-grain Fuselage material should generally C grain 8-10 lb density Wing prefer cut parts component like wing before assembly care wing skins can cut 36-inch stock little waste used three-inch-wide stock spliced skins before assembly required width remaining /16 material should used wing ribs stripped leading trailing edge 8 lb stock metal straightedge Its big help sand skins smooth before assembly Use 150-grit sandpaper block task Begin wing assembly pinning bottom skins flat work board Yr shim strip needed under front form airfoil Glue trailing edge strips place add ribs Note center rib tilted slighfly match dihedral angle prefer Super Jet glue general assembly work Carefully fit glue leading edge strips place Dry-fit top skins carefully before bonding satisfied glue ribs trailing edges prefer make bond leading edge thin Jet glue best penetration dry lift panels work surface trim excess material edges Attach tip blocks finish panels contour smoothness Take care match leading edge shape shown Join panels Super Jet being sure match dihedral angle Additional bracing unnecessary finished uncovered wing should weigh e less Fuselage Cut parts material specified making sure cut openings fuselage sides time Glue 1/g strips two sides cabin area along A6 reinforcing strip top edge side assemblies joined first cabin 1/8 crosspieces pulled together tail Please work over top view avoid building banana firewall should fined 2-56 blind nuts glued placewatch warps did use extra bracing firewall little glue fillet would August1994 35 Fuselage tail surfaces medium-weight C-grain balsa Cut parts prior beginning construction Perkys wing fully sheeted toughness various flying sites fuselage simple sheet box Perkys small size plenty room shift radio equipment until proper balance achieved Author carved several maple props successful attempt increase performance over standard Cox prop see text Control horns %2 plywood hinges thin mylar pushrod ends 1/32 music wire Note antenna routing Full-Size Plans AvailableSee Page 168 BALOATR 7A-Afll/IB1/F 6/SB FUWOOD TRIM PROP FROM COOS/SAS MROOFSAIMIPSFROB/BRI/4BALSA000010 OTOBAOTICC.1--,./ASoo0110 1112 SIRe BROS RATIOSY I 10/COlT 6SWOON IFLOIL/SAR BlOBS ITS BALSA NAB BASROC IllS BRASS TILBIRA 1/32 PLY 0000 IIS CIIzrz SO SCALEDESISIES BTOAVERORELEN 56002ALL ROOTS 1/11 PLYWOOOoo . RONONRAM 00ORIONT SN/ARC Ili11 order Cover top bottom 1/32 sheet grain running crosswise after installing plywood landing gear mount pieces Sand smooth over set aside Tail surfaces Cut parts C-grain 8 lb balsa Fashion elevator joiner wire attach elevators Sand parts smooth prepare covering Covering Perky should covered components still separate As mentioned use Super MonoKote work care avoid warping damaging delicate tail surfaces Some colors weigh less others used opaque red transparent yellow Assembly Cut install plywood control horns tail surfaces used thin mylar drafting stock about 006 hinges cut /8-inch width fastened thin Jet Check drafting supply store material Check smooth operation before proceeding make corrections needed Glue horizontal tail place using wing mounted cabin check alignment Install vertical tail now add bottom hinge Mount tailskid back used 46 dowels wing hold-downs held place Super Jet landing gear completed fitting prebent wire legs fuselage adding 020 wire clamps Attach everything together thin Jet no really suitable wheels project made set result very light tough smooth-running wheel Starting thin plywood disk cut size bonded short piece brass tubing center cut tire electrical insulation split glued around outer edge Soak wheels thin Jet coat fuelproof paint really durable result engine fastened nose 2-56 screws just long enough reach blind nut longer could result damage battery Check engine thrustline angles should no down side thrust Install radio equipment loosely strap wing center gravity CG check vital balance Perky designated locationmove equipment achieve condition note location components Mount servos servo mounting tape fit piece stiff sponge between vibration damping Make up pushrods 3/33 square balsa 1/3 music wire use tiny dab epoxy trap rods control horns Set control throws follows rudder /6 left right center elevator /s up down Mount battery receiver using soft sponge rubber foam Make sure cannot touch anything solid route antenna out tail Let excess antenna trail behinddont tempted cut off coil up extra result would loss control Preflight Perky performing range check per equipment instructions final alignment check flat surface kitchen counter Mount Cox 30 x 125 prop backwards flaish whatever engine check runs need ensure reliable operation possible choose soft grassy site first flights engine running slightly rich toss Perky wind about /2 tank fuel aboard Spend first few flights checking out feel model learning glide performance Just like space shuttle get try point its up make fine adjustments normal get model Since anything can improved would glad hear comments feedback regarding Perky odel Aviation BORI I/lB BALSA 1/ISaiSRROROTIOSSON I/SB BAASA Type RO Sport Wingspan 20 inches Engine size/type Tee Dee 010 Number channels Two Flying weight 475 ounces Construction Balsa sheet Covering/finish Transparent MonoKote
Edition: Model Aviation - 1994/08
Page Numbers: 33, 34, 35, 36
Pcr Perky solution problem becoming altogether too common Traditionally RC models flown club fields structured regimented fashion typically fields located considerable drive home Meanwhile numerous small local fields evident could accommodate small light model non-threatening nature Dav Rob len August1994 33 Pcry twist starter spring Perky ready go Duct-tape turbulator added improve slowflight handling Perky designed make use smaller fields totally compromising quality its basic flight characteristics Perky must also handle breezy weather seems type have am advocating flying models banned areas failing way conform AMA safety code am suggesting using small light lowpowered model us could find some convenient local site keep skills honed between trips regular club field Although have number miniature RC projects past seemed meet requirements major compromises led decision create fresh design retaining best qualities past projects expanding performance personal preference speedy maneuverable craft however wanted able share Perky young kids well capable gentle stable hands-off flight typical trainer As began planning stages Perky quick check hobby advertisements showed Cox still offering cute little 010 engine Bill Cannon producing Super-Micro RC system products formed basis sizing new project combined produce smallest lightest equipment package currently available minimum all-up weight going pretty much set choice equipment engine appeared between 41/2 5 ounces depending final selection construction finishing materials Based previous experience decided twochannel control being completely adequate provide desired maneuverability keeping weight minimum next decision area wing requirement minimum flying speed 15 mph coupled projected weight tended place wing area about 80 square inches used clean airfoil nonnal lift capability choice best airfoil major design challenge top speed along maneuvering qualities would both strongly affected final selection literature search turned up some outstanding work done Princeton University Selig Donovan et al dealing mainly airfoils RC sailplanes Among sections studied venerable Clark Y appeared have superior performance small low-speed wings However data did extend down minimum values calculated Perky some uncertainty about minimum speed high-lift maneuvers Regardless small problem Clark Y chosen based available data actual layout shape Perky combines effort retain connection vintage styles using minimum amount material choice highwing cabin style strongly influenced desire ease handling experience has taught rudder elevator control would quite adequate desired maneuvers materials chosen construction finish include cyanoacrylate CyA adhesives Super MonoKote covering structure good old balsa dab plywood Jam probably oldfashioned narrow-minded chose use kind modem composite materials seen widely todayI used KISS principle Keep Simple Stupid instead maintain pure airfoil shape provide extreme damage resistance wing fully sheeted Although slight weight penalty some flying site options justify choice size tail surfaces force arrangement follow standard practices established previous designs rather short nose dictated weight engine relative rest model Construction Perky went very quickly once decisions reached finished procrastinating final weight 475 ounces equipment including 75 mAh battery Once Perky finished weather decided play roughwind rain cold long week Finally day came wind dropped 10-15 mph oniy moderate gusts initial flights chose use stock 3 x 125 prop Cox racing fuel immediately obvious top speed would adequate around 50 mph engine running full speed aerobatic capability outstanding well performing consecutive loops rolls stall turns snap rolls spins much third flight point Perky well established performance machine gliding performance less desired slow flight required too much effort controls Going back scientific literature seemed laminar separation bubble forming top Perkys wing 25 mph below fix condition involved fastening turbulator strip wing upper surface no rigid guidelines treatment used cut fly approach final result narrow strip duct tape 5% back leading edge fix place Perky delight fly flown reasonably slowly nineyear-old son Paul can handle Perky just fine glide dramatically improved Perky handles like much larger machine turbulator installed Being purist heart realized might possible expand performance Perky careful propeller matching problem limited choice commercial props just Since enjoy carving prop guidelines well established decided carve few alternate choices maple results gratifying example 375 x 10 prop substantially improved climb clipping little off top speed 325 x 125 34 Model Aviation e increased top speed noticeably improved some maneuvers Please aware possible permanently damage Cox 010 just lean run too much prop load Proceed very carefully experiments though Perky very easy fly would encourage beginner attempt first project very close tolerances involved construction alignment some experienced judgement required during early flights trimming best performance Provided comfortable two-channel 049 projects market Perky should no problem CONSTRUCTION Because success model project depends materials used am going mention brand names worked well Obviously others would just fine Balsa plywood Sig Mfg Co CyA glue products Carl Goldberg Models Jet Super Jet Covering material Super MonoKote Perky requires small amount wood really worth effort select best job wing should constructed 5-6 lb density A-graln wood tip blocks should cut very lightest wood available hollowed out possible tall surfaces should cut l0-lb-density C-grain Fuselage material should generally C grain 8-10 lb density Wing prefer cut parts component like wing before assembly care wing skins can cut 36-inch stock little waste used three-inch-wide stock spliced skins before assembly required width remaining /16 material should used wing ribs stripped leading trailing edge 8 lb stock metal straightedge Its big help sand skins smooth before assembly Use 150-grit sandpaper block task Begin wing assembly pinning bottom skins flat work board Yr shim strip needed under front form airfoil Glue trailing edge strips place add ribs Note center rib tilted slighfly match dihedral angle prefer Super Jet glue general assembly work Carefully fit glue leading edge strips place Dry-fit top skins carefully before bonding satisfied glue ribs trailing edges prefer make bond leading edge thin Jet glue best penetration dry lift panels work surface trim excess material edges Attach tip blocks finish panels contour smoothness Take care match leading edge shape shown Join panels Super Jet being sure match dihedral angle Additional bracing unnecessary finished uncovered wing should weigh e less Fuselage Cut parts material specified making sure cut openings fuselage sides time Glue 1/g strips two sides cabin area along A6 reinforcing strip top edge side assemblies joined first cabin 1/8 crosspieces pulled together tail Please work over top view avoid building banana firewall should fined 2-56 blind nuts glued placewatch warps did use extra bracing firewall little glue fillet would August1994 35 Fuselage tail surfaces medium-weight C-grain balsa Cut parts prior beginning construction Perkys wing fully sheeted toughness various flying sites fuselage simple sheet box Perkys small size plenty room shift radio equipment until proper balance achieved Author carved several maple props successful attempt increase performance over standard Cox prop see text Control horns %2 plywood hinges thin mylar pushrod ends 1/32 music wire Note antenna routing Full-Size Plans AvailableSee Page 168 BALOATR 7A-Afll/IB1/F 6/SB FUWOOD TRIM PROP FROM COOS/SAS MROOFSAIMIPSFROB/BRI/4BALSA000010 OTOBAOTICC.1--,./ASoo0110 1112 SIRe BROS RATIOSY I 10/COlT 6SWOON IFLOIL/SAR BlOBS ITS BALSA NAB BASROC IllS BRASS TILBIRA 1/32 PLY 0000 IIS CIIzrz SO SCALEDESISIES BTOAVERORELEN 56002ALL ROOTS 1/11 PLYWOOOoo . RONONRAM 00ORIONT SN/ARC Ili11 order Cover top bottom 1/32 sheet grain running crosswise after installing plywood landing gear mount pieces Sand smooth over set aside Tail surfaces Cut parts C-grain 8 lb balsa Fashion elevator joiner wire attach elevators Sand parts smooth prepare covering Covering Perky should covered components still separate As mentioned use Super MonoKote work care avoid warping damaging delicate tail surfaces Some colors weigh less others used opaque red transparent yellow Assembly Cut install plywood control horns tail surfaces used thin mylar drafting stock about 006 hinges cut /8-inch width fastened thin Jet Check drafting supply store material Check smooth operation before proceeding make corrections needed Glue horizontal tail place using wing mounted cabin check alignment Install vertical tail now add bottom hinge Mount tailskid back used 46 dowels wing hold-downs held place Super Jet landing gear completed fitting prebent wire legs fuselage adding 020 wire clamps Attach everything together thin Jet no really suitable wheels project made set result very light tough smooth-running wheel Starting thin plywood disk cut size bonded short piece brass tubing center cut tire electrical insulation split glued around outer edge Soak wheels thin Jet coat fuelproof paint really durable result engine fastened nose 2-56 screws just long enough reach blind nut longer could result damage battery Check engine thrustline angles should no down side thrust Install radio equipment loosely strap wing center gravity CG check vital balance Perky designated locationmove equipment achieve condition note location components Mount servos servo mounting tape fit piece stiff sponge between vibration damping Make up pushrods 3/33 square balsa 1/3 music wire use tiny dab epoxy trap rods control horns Set control throws follows rudder /6 left right center elevator /s up down Mount battery receiver using soft sponge rubber foam Make sure cannot touch anything solid route antenna out tail Let excess antenna trail behinddont tempted cut off coil up extra result would loss control Preflight Perky performing range check per equipment instructions final alignment check flat surface kitchen counter Mount Cox 30 x 125 prop backwards flaish whatever engine check runs need ensure reliable operation possible choose soft grassy site first flights engine running slightly rich toss Perky wind about /2 tank fuel aboard Spend first few flights checking out feel model learning glide performance Just like space shuttle get try point its up make fine adjustments normal get model Since anything can improved would glad hear comments feedback regarding Perky odel Aviation BORI I/lB BALSA 1/ISaiSRROROTIOSSON I/SB BAASA Type RO Sport Wingspan 20 inches Engine size/type Tee Dee 010 Number channels Two Flying weight 475 ounces Construction Balsa sheet Covering/finish Transparent MonoKote
Edition: Model Aviation - 1994/08
Page Numbers: 33, 34, 35, 36
Pcr Perky solution problem becoming altogether too common Traditionally RC models flown club fields structured regimented fashion typically fields located considerable drive home Meanwhile numerous small local fields evident could accommodate small light model non-threatening nature Dav Rob len August1994 33 Pcry twist starter spring Perky ready go Duct-tape turbulator added improve slowflight handling Perky designed make use smaller fields totally compromising quality its basic flight characteristics Perky must also handle breezy weather seems type have am advocating flying models banned areas failing way conform AMA safety code am suggesting using small light lowpowered model us could find some convenient local site keep skills honed between trips regular club field Although have number miniature RC projects past seemed meet requirements major compromises led decision create fresh design retaining best qualities past projects expanding performance personal preference speedy maneuverable craft however wanted able share Perky young kids well capable gentle stable hands-off flight typical trainer As began planning stages Perky quick check hobby advertisements showed Cox still offering cute little 010 engine Bill Cannon producing Super-Micro RC system products formed basis sizing new project combined produce smallest lightest equipment package currently available minimum all-up weight going pretty much set choice equipment engine appeared between 41/2 5 ounces depending final selection construction finishing materials Based previous experience decided twochannel control being completely adequate provide desired maneuverability keeping weight minimum next decision area wing requirement minimum flying speed 15 mph coupled projected weight tended place wing area about 80 square inches used clean airfoil nonnal lift capability choice best airfoil major design challenge top speed along maneuvering qualities would both strongly affected final selection literature search turned up some outstanding work done Princeton University Selig Donovan et al dealing mainly airfoils RC sailplanes Among sections studied venerable Clark Y appeared have superior performance small low-speed wings However data did extend down minimum values calculated Perky some uncertainty about minimum speed high-lift maneuvers Regardless small problem Clark Y chosen based available data actual layout shape Perky combines effort retain connection vintage styles using minimum amount material choice highwing cabin style strongly influenced desire ease handling experience has taught rudder elevator control would quite adequate desired maneuvers materials chosen construction finish include cyanoacrylate CyA adhesives Super MonoKote covering structure good old balsa dab plywood Jam probably oldfashioned narrow-minded chose use kind modem composite materials seen widely todayI used KISS principle Keep Simple Stupid instead maintain pure airfoil shape provide extreme damage resistance wing fully sheeted Although slight weight penalty some flying site options justify choice size tail surfaces force arrangement follow standard practices established previous designs rather short nose dictated weight engine relative rest model Construction Perky went very quickly once decisions reached finished procrastinating final weight 475 ounces equipment including 75 mAh battery Once Perky finished weather decided play roughwind rain cold long week Finally day came wind dropped 10-15 mph oniy moderate gusts initial flights chose use stock 3 x 125 prop Cox racing fuel immediately obvious top speed would adequate around 50 mph engine running full speed aerobatic capability outstanding well performing consecutive loops rolls stall turns snap rolls spins much third flight point Perky well established performance machine gliding performance less desired slow flight required too much effort controls Going back scientific literature seemed laminar separation bubble forming top Perkys wing 25 mph below fix condition involved fastening turbulator strip wing upper surface no rigid guidelines treatment used cut fly approach final result narrow strip duct tape 5% back leading edge fix place Perky delight fly flown reasonably slowly nineyear-old son Paul can handle Perky just fine glide dramatically improved Perky handles like much larger machine turbulator installed Being purist heart realized might possible expand performance Perky careful propeller matching problem limited choice commercial props just Since enjoy carving prop guidelines well established decided carve few alternate choices maple results gratifying example 375 x 10 prop substantially improved climb clipping little off top speed 325 x 125 34 Model Aviation e increased top speed noticeably improved some maneuvers Please aware possible permanently damage Cox 010 just lean run too much prop load Proceed very carefully experiments though Perky very easy fly would encourage beginner attempt first project very close tolerances involved construction alignment some experienced judgement required during early flights trimming best performance Provided comfortable two-channel 049 projects market Perky should no problem CONSTRUCTION Because success model project depends materials used am going mention brand names worked well Obviously others would just fine Balsa plywood Sig Mfg Co CyA glue products Carl Goldberg Models Jet Super Jet Covering material Super MonoKote Perky requires small amount wood really worth effort select best job wing should constructed 5-6 lb density A-graln wood tip blocks should cut very lightest wood available hollowed out possible tall surfaces should cut l0-lb-density C-grain Fuselage material should generally C grain 8-10 lb density Wing prefer cut parts component like wing before assembly care wing skins can cut 36-inch stock little waste used three-inch-wide stock spliced skins before assembly required width remaining /16 material should used wing ribs stripped leading trailing edge 8 lb stock metal straightedge Its big help sand skins smooth before assembly Use 150-grit sandpaper block task Begin wing assembly pinning bottom skins flat work board Yr shim strip needed under front form airfoil Glue trailing edge strips place add ribs Note center rib tilted slighfly match dihedral angle prefer Super Jet glue general assembly work Carefully fit glue leading edge strips place Dry-fit top skins carefully before bonding satisfied glue ribs trailing edges prefer make bond leading edge thin Jet glue best penetration dry lift panels work surface trim excess material edges Attach tip blocks finish panels contour smoothness Take care match leading edge shape shown Join panels Super Jet being sure match dihedral angle Additional bracing unnecessary finished uncovered wing should weigh e less Fuselage Cut parts material specified making sure cut openings fuselage sides time Glue 1/g strips two sides cabin area along A6 reinforcing strip top edge side assemblies joined first cabin 1/8 crosspieces pulled together tail Please work over top view avoid building banana firewall should fined 2-56 blind nuts glued placewatch warps did use extra bracing firewall little glue fillet would August1994 35 Fuselage tail surfaces medium-weight C-grain balsa Cut parts prior beginning construction Perkys wing fully sheeted toughness various flying sites fuselage simple sheet box Perkys small size plenty room shift radio equipment until proper balance achieved Author carved several maple props successful attempt increase performance over standard Cox prop see text Control horns %2 plywood hinges thin mylar pushrod ends 1/32 music wire Note antenna routing Full-Size Plans AvailableSee Page 168 BALOATR 7A-Afll/IB1/F 6/SB FUWOOD TRIM PROP FROM COOS/SAS MROOFSAIMIPSFROB/BRI/4BALSA000010 OTOBAOTICC.1--,./ASoo0110 1112 SIRe BROS RATIOSY I 10/COlT 6SWOON IFLOIL/SAR BlOBS ITS BALSA NAB BASROC IllS BRASS TILBIRA 1/32 PLY 0000 IIS CIIzrz SO SCALEDESISIES BTOAVERORELEN 56002ALL ROOTS 1/11 PLYWOOOoo . RONONRAM 00ORIONT SN/ARC Ili11 order Cover top bottom 1/32 sheet grain running crosswise after installing plywood landing gear mount pieces Sand smooth over set aside Tail surfaces Cut parts C-grain 8 lb balsa Fashion elevator joiner wire attach elevators Sand parts smooth prepare covering Covering Perky should covered components still separate As mentioned use Super MonoKote work care avoid warping damaging delicate tail surfaces Some colors weigh less others used opaque red transparent yellow Assembly Cut install plywood control horns tail surfaces used thin mylar drafting stock about 006 hinges cut /8-inch width fastened thin Jet Check drafting supply store material Check smooth operation before proceeding make corrections needed Glue horizontal tail place using wing mounted cabin check alignment Install vertical tail now add bottom hinge Mount tailskid back used 46 dowels wing hold-downs held place Super Jet landing gear completed fitting prebent wire legs fuselage adding 020 wire clamps Attach everything together thin Jet no really suitable wheels project made set result very light tough smooth-running wheel Starting thin plywood disk cut size bonded short piece brass tubing center cut tire electrical insulation split glued around outer edge Soak wheels thin Jet coat fuelproof paint really durable result engine fastened nose 2-56 screws just long enough reach blind nut longer could result damage battery Check engine thrustline angles should no down side thrust Install radio equipment loosely strap wing center gravity CG check vital balance Perky designated locationmove equipment achieve condition note location components Mount servos servo mounting tape fit piece stiff sponge between vibration damping Make up pushrods 3/33 square balsa 1/3 music wire use tiny dab epoxy trap rods control horns Set control throws follows rudder /6 left right center elevator /s up down Mount battery receiver using soft sponge rubber foam Make sure cannot touch anything solid route antenna out tail Let excess antenna trail behinddont tempted cut off coil up extra result would loss control Preflight Perky performing range check per equipment instructions final alignment check flat surface kitchen counter Mount Cox 30 x 125 prop backwards flaish whatever engine check runs need ensure reliable operation possible choose soft grassy site first flights engine running slightly rich toss Perky wind about /2 tank fuel aboard Spend first few flights checking out feel model learning glide performance Just like space shuttle get try point its up make fine adjustments normal get model Since anything can improved would glad hear comments feedback regarding Perky odel Aviation BORI I/lB BALSA 1/ISaiSRROROTIOSSON I/SB BAASA Type RO Sport Wingspan 20 inches Engine size/type Tee Dee 010 Number channels Two Flying weight 475 ounces Construction Balsa sheet Covering/finish Transparent MonoKote