Jerry Clifton THE GREMLIN inspired close modeler friend Stan Griffith Stan has liked old-timey-looking air planes years day took couple Falcon 56 wings put fuselage own design came up fine antique-looking two-winger pleasure test flying Stans new bird have homades calls make long story short such genuine pleasure fly decided design biplane did ever want maneuverability well stability thus long nose tail mo ments ground handling thus wide gear able handle engine thus 1000 sq wing area light ness structure original weighed 3 pounds less engine radio also should able handle abuse un trained thumbs well High G pattern maneuvers thus rigid structural design traits incorporated Gremlin Build will pleased red blue trim Gremlin makes good first impression nose-down view surprised its performance concept inspired friend put together two Falcon 56 wings Fox Eagle engine shown plans 35 up OK Below Installation leaves plenty room Fuselage Lets start fuselage since completion top wing depends cabane struts mounting hole alignment Make sure sides match up top edges perfectly straight Add ply doublers aft longerons ones front will added later After has dried mark thrust line former locations inside fuselage sides Glue motor mounts sides top edge mount along thrust line following steps determine wing alignment make sure get righttake time right fuse lage side flat surface accurately mark position cabane strut using strut itself guide same left side Next lay cabane struts fuselage sides check see front bottom edges perpendicular parallel thrust line have cut cabane struts accurately notch bottom strut should line up over F2 former location fits glue down epoxy add racing forward top bottom strips around strut Repeat process left side should end up two perfectly matched sides Using square glue formers F2 F3 place right fuselage side dry remove workbench lay left side down glue sides together Use square keep sides parallel Install Fl using epoxy pins clamps whatever hold together Alignment wont problem make sure Fl flush front sides Draw centerline workbench line should run edge front fuselage can hang over Mark rear cross braces former F3 loca tion across centerline Turn fuse lage upside down position over centerline Pin fuselage down firmly F3 location pull rear end gether hold place clothes pin Glue place both top bottom cross braces Wait dry epoxy tailpost has cured remove fuselage bench Add remainder formers stringers bottom sheeting front cowl blocks nose ring etc point Ill make sheet ing around cabane struts cockpit area trial error type thing although too difficult Just use poster board stiff paper until have pat tern fits Also note sheet must go outside edge fuselage leaves gap along top edge fuse lage base cabane struts Fill gap /4 sq soft balsa trim fuselage contour After sheeting has glued place install /8-in hard wood dowel braces between struts Tack glue hatch block place 32 Model Aviation sand everything shape top wing mounting brackets will installed after wing assembly Finally desired may use 15-in Halco-type landing gear place shown Just substitute piece /4 ply place ofthe torsion blocks bolt gear place Wings Construction conventional therefore will dwell key points bottom wing built over plan straightforward However note panels joined after construction during After constructing bottom panels slight bevel sanded root rib panel proper dihedral Block up tip rib Position panel flush along edge bench block sander sand bevel using edge workbench guide Repeat other panel gives inch total dihedral Butt join panels epoxy making sure rib centerlines match After cures cut away center rib shown servo box Add /s ply braces front rear shown also serve front rear servo box faces done add center sheeting cut sheeting center Because shallow dihedral angle isnt necessary Just pin down dry cut out servo box add front /4 dowel glue cap-strips install torque rods ailerons tips top wing built similarly except hold-down nut blocks no di hedral plans show necessary changes made Note interplane strut boxes bottom top wing Top Wing Mounting Using center chord line wing reference line very carefully measure mounting hole cen ters front rear Drill tap -20 holes Bolt mounting brackets wing firmly making sure inside edges parallel center chord line wing Now set wing cabane struts bracket should out side incidence 0 degrees set sliding wing fore aft until cen ter leading edge center trailing edge measure same Use upper edge fuselage thrust line measuring reference correctly aligned moving anything mark holes mounting brackets cabane struts Next remove brack ets wing Now drill 4/40 clear ance holes points just marked Bolt brackets cabane struts using 4-40 x /8 bolts blind nuts turned out Tighten down epoxy well prevent loosening interplane struts laminated 1/16 ply core 1/16 balsa either side Notch out install epoxy upper mounting brackets sure make right left bracket Using #4 sheet metal screws mount struts top wing Next put bottom wing December1975 33 Gremlin fuselage set top wing Bolt down -20 nylon screws did everything right point distance between wing tips should pretty close same Mine didnt come out too close found out later shelf corner brackets used mount top wing didnt have necessary 90degree angle So check first should home free Once equal spacing obtained mark location notch out install bottom strut mounting brackets Tail Surfaces Nothing fancy Just um sheet balsa Take care elevators assembled flat sur face may end up undesira ble built-in turn suggest mounting both wings installing stab fin assemblies greatly aids alignment Finish I could cop out say finish own taste Im sure younger modelers may know tried true finish Nothing fantastic mind goes easy looks good 1 Fill dings dents etc using favorite filler 2 Sand whole mess down 400grit sandpaper 3 Brush two coats clear dope full strength sanding 400-grit sand paper between coats 4 Cover wings rear fuselage area whatever have handy silk Silkspan Coverite etc Take care covering goes smoothly 34 Model Aviation Old reliable Fox 59 up front pic Takes Dubro muffel-air pressure fitting keep engine running both smoothly quietly minimum wrinkles fill grain 50 percent thinned clear dope About four coats should 5 Spray two coats favorite color Add trim method provides light finish trifle time-consuming de sire use Monokote Solarfilm Elitecoat Flying Now comes fun part flying sure CG shown plans overly sensitive CG placement position seems about right Check double check radio installa tion proper foam padding around battery pack receiver Check Kwik-links time Also check havent hooked up control back ward happens best Range check radio engine running should done new bird radio worked good plane took out Gremlin will handle wide range power strong 35 howling 61 take pick flight perform ance will depend power choose Take-offs straight true smaller engines sure have flying speed before lift-off adjust transmitter trim need orig inal needed two turns right aileron trim due off-center aileron servo hooked up link age have trimmed level flight proceed whatever ability power allows Landings very slow no tendency fall off wing fact calm day can bring low slow set tail wheel down first mains still few inches off run along another 10 feet before settles Just doesnt want quit larger engines will fly FAI pattern maneuvers added grace two-winger has does excel some maneuvers such knife-edge spins Roll over knife-edge give full top-rudder climb out better 45-degree angle Spins good easy enter count Its descent rate actually seems decrease spin rotation remains constant Got bipe mind Heres rugged sport bit pattern final note flying doubts about method used top wing mount ing therefore felt test its fullest test did have tried least dozen occasions pull wings off has sent full throttle through several hundred feet sky straight down square corner bottom Thus far have unable structural damage other maneuver including violent snap rolls original has logged 89 flights article treat gently days Gremlin structurally sound design barring radio failure 400 feet will around long time Its trainer pat tern flyerAbe power choose deter mines its character December 1975 35 Seen down under landing gear auxiliary spreader wire wire wound soldered main struts shows clearly radioHeath gear casemounts through lower wing opening visible just behind landing gear author wishes thank Stan Griffith inspira tion Roscoc Pearson pictures accompany article picture sometimes really worth thousand words Close-up cabane struts fittings easily checked out reference plans Left Jerry firmly flips 11-7 propeller ship tested struc tural integrity dozens straight-down flights through hundreds feet sky followed square corner simulated landing shot makes point landings can quite slow dropping wing can flared until tail wheel touches
Edition: Model Aviation - 1975/12
Page Numbers: 32, 33, 34, 35
Jerry Clifton THE GREMLIN inspired close modeler friend Stan Griffith Stan has liked old-timey-looking air planes years day took couple Falcon 56 wings put fuselage own design came up fine antique-looking two-winger pleasure test flying Stans new bird have homades calls make long story short such genuine pleasure fly decided design biplane did ever want maneuverability well stability thus long nose tail mo ments ground handling thus wide gear able handle engine thus 1000 sq wing area light ness structure original weighed 3 pounds less engine radio also should able handle abuse un trained thumbs well High G pattern maneuvers thus rigid structural design traits incorporated Gremlin Build will pleased red blue trim Gremlin makes good first impression nose-down view surprised its performance concept inspired friend put together two Falcon 56 wings Fox Eagle engine shown plans 35 up OK Below Installation leaves plenty room Fuselage Lets start fuselage since completion top wing depends cabane struts mounting hole alignment Make sure sides match up top edges perfectly straight Add ply doublers aft longerons ones front will added later After has dried mark thrust line former locations inside fuselage sides Glue motor mounts sides top edge mount along thrust line following steps determine wing alignment make sure get righttake time right fuse lage side flat surface accurately mark position cabane strut using strut itself guide same left side Next lay cabane struts fuselage sides check see front bottom edges perpendicular parallel thrust line have cut cabane struts accurately notch bottom strut should line up over F2 former location fits glue down epoxy add racing forward top bottom strips around strut Repeat process left side should end up two perfectly matched sides Using square glue formers F2 F3 place right fuselage side dry remove workbench lay left side down glue sides together Use square keep sides parallel Install Fl using epoxy pins clamps whatever hold together Alignment wont problem make sure Fl flush front sides Draw centerline workbench line should run edge front fuselage can hang over Mark rear cross braces former F3 loca tion across centerline Turn fuse lage upside down position over centerline Pin fuselage down firmly F3 location pull rear end gether hold place clothes pin Glue place both top bottom cross braces Wait dry epoxy tailpost has cured remove fuselage bench Add remainder formers stringers bottom sheeting front cowl blocks nose ring etc point Ill make sheet ing around cabane struts cockpit area trial error type thing although too difficult Just use poster board stiff paper until have pat tern fits Also note sheet must go outside edge fuselage leaves gap along top edge fuse lage base cabane struts Fill gap /4 sq soft balsa trim fuselage contour After sheeting has glued place install /8-in hard wood dowel braces between struts Tack glue hatch block place 32 Model Aviation sand everything shape top wing mounting brackets will installed after wing assembly Finally desired may use 15-in Halco-type landing gear place shown Just substitute piece /4 ply place ofthe torsion blocks bolt gear place Wings Construction conventional therefore will dwell key points bottom wing built over plan straightforward However note panels joined after construction during After constructing bottom panels slight bevel sanded root rib panel proper dihedral Block up tip rib Position panel flush along edge bench block sander sand bevel using edge workbench guide Repeat other panel gives inch total dihedral Butt join panels epoxy making sure rib centerlines match After cures cut away center rib shown servo box Add /s ply braces front rear shown also serve front rear servo box faces done add center sheeting cut sheeting center Because shallow dihedral angle isnt necessary Just pin down dry cut out servo box add front /4 dowel glue cap-strips install torque rods ailerons tips top wing built similarly except hold-down nut blocks no di hedral plans show necessary changes made Note interplane strut boxes bottom top wing Top Wing Mounting Using center chord line wing reference line very carefully measure mounting hole cen ters front rear Drill tap -20 holes Bolt mounting brackets wing firmly making sure inside edges parallel center chord line wing Now set wing cabane struts bracket should out side incidence 0 degrees set sliding wing fore aft until cen ter leading edge center trailing edge measure same Use upper edge fuselage thrust line measuring reference correctly aligned moving anything mark holes mounting brackets cabane struts Next remove brack ets wing Now drill 4/40 clear ance holes points just marked Bolt brackets cabane struts using 4-40 x /8 bolts blind nuts turned out Tighten down epoxy well prevent loosening interplane struts laminated 1/16 ply core 1/16 balsa either side Notch out install epoxy upper mounting brackets sure make right left bracket Using #4 sheet metal screws mount struts top wing Next put bottom wing December1975 33 Gremlin fuselage set top wing Bolt down -20 nylon screws did everything right point distance between wing tips should pretty close same Mine didnt come out too close found out later shelf corner brackets used mount top wing didnt have necessary 90degree angle So check first should home free Once equal spacing obtained mark location notch out install bottom strut mounting brackets Tail Surfaces Nothing fancy Just um sheet balsa Take care elevators assembled flat sur face may end up undesira ble built-in turn suggest mounting both wings installing stab fin assemblies greatly aids alignment Finish I could cop out say finish own taste Im sure younger modelers may know tried true finish Nothing fantastic mind goes easy looks good 1 Fill dings dents etc using favorite filler 2 Sand whole mess down 400grit sandpaper 3 Brush two coats clear dope full strength sanding 400-grit sand paper between coats 4 Cover wings rear fuselage area whatever have handy silk Silkspan Coverite etc Take care covering goes smoothly 34 Model Aviation Old reliable Fox 59 up front pic Takes Dubro muffel-air pressure fitting keep engine running both smoothly quietly minimum wrinkles fill grain 50 percent thinned clear dope About four coats should 5 Spray two coats favorite color Add trim method provides light finish trifle time-consuming de sire use Monokote Solarfilm Elitecoat Flying Now comes fun part flying sure CG shown plans overly sensitive CG placement position seems about right Check double check radio installa tion proper foam padding around battery pack receiver Check Kwik-links time Also check havent hooked up control back ward happens best Range check radio engine running should done new bird radio worked good plane took out Gremlin will handle wide range power strong 35 howling 61 take pick flight perform ance will depend power choose Take-offs straight true smaller engines sure have flying speed before lift-off adjust transmitter trim need orig inal needed two turns right aileron trim due off-center aileron servo hooked up link age have trimmed level flight proceed whatever ability power allows Landings very slow no tendency fall off wing fact calm day can bring low slow set tail wheel down first mains still few inches off run along another 10 feet before settles Just doesnt want quit larger engines will fly FAI pattern maneuvers added grace two-winger has does excel some maneuvers such knife-edge spins Roll over knife-edge give full top-rudder climb out better 45-degree angle Spins good easy enter count Its descent rate actually seems decrease spin rotation remains constant Got bipe mind Heres rugged sport bit pattern final note flying doubts about method used top wing mount ing therefore felt test its fullest test did have tried least dozen occasions pull wings off has sent full throttle through several hundred feet sky straight down square corner bottom Thus far have unable structural damage other maneuver including violent snap rolls original has logged 89 flights article treat gently days Gremlin structurally sound design barring radio failure 400 feet will around long time Its trainer pat tern flyerAbe power choose deter mines its character December 1975 35 Seen down under landing gear auxiliary spreader wire wire wound soldered main struts shows clearly radioHeath gear casemounts through lower wing opening visible just behind landing gear author wishes thank Stan Griffith inspira tion Roscoc Pearson pictures accompany article picture sometimes really worth thousand words Close-up cabane struts fittings easily checked out reference plans Left Jerry firmly flips 11-7 propeller ship tested struc tural integrity dozens straight-down flights through hundreds feet sky followed square corner simulated landing shot makes point landings can quite slow dropping wing can flared until tail wheel touches
Edition: Model Aviation - 1975/12
Page Numbers: 32, 33, 34, 35
Jerry Clifton THE GREMLIN inspired close modeler friend Stan Griffith Stan has liked old-timey-looking air planes years day took couple Falcon 56 wings put fuselage own design came up fine antique-looking two-winger pleasure test flying Stans new bird have homades calls make long story short such genuine pleasure fly decided design biplane did ever want maneuverability well stability thus long nose tail mo ments ground handling thus wide gear able handle engine thus 1000 sq wing area light ness structure original weighed 3 pounds less engine radio also should able handle abuse un trained thumbs well High G pattern maneuvers thus rigid structural design traits incorporated Gremlin Build will pleased red blue trim Gremlin makes good first impression nose-down view surprised its performance concept inspired friend put together two Falcon 56 wings Fox Eagle engine shown plans 35 up OK Below Installation leaves plenty room Fuselage Lets start fuselage since completion top wing depends cabane struts mounting hole alignment Make sure sides match up top edges perfectly straight Add ply doublers aft longerons ones front will added later After has dried mark thrust line former locations inside fuselage sides Glue motor mounts sides top edge mount along thrust line following steps determine wing alignment make sure get righttake time right fuse lage side flat surface accurately mark position cabane strut using strut itself guide same left side Next lay cabane struts fuselage sides check see front bottom edges perpendicular parallel thrust line have cut cabane struts accurately notch bottom strut should line up over F2 former location fits glue down epoxy add racing forward top bottom strips around strut Repeat process left side should end up two perfectly matched sides Using square glue formers F2 F3 place right fuselage side dry remove workbench lay left side down glue sides together Use square keep sides parallel Install Fl using epoxy pins clamps whatever hold together Alignment wont problem make sure Fl flush front sides Draw centerline workbench line should run edge front fuselage can hang over Mark rear cross braces former F3 loca tion across centerline Turn fuse lage upside down position over centerline Pin fuselage down firmly F3 location pull rear end gether hold place clothes pin Glue place both top bottom cross braces Wait dry epoxy tailpost has cured remove fuselage bench Add remainder formers stringers bottom sheeting front cowl blocks nose ring etc point Ill make sheet ing around cabane struts cockpit area trial error type thing although too difficult Just use poster board stiff paper until have pat tern fits Also note sheet must go outside edge fuselage leaves gap along top edge fuse lage base cabane struts Fill gap /4 sq soft balsa trim fuselage contour After sheeting has glued place install /8-in hard wood dowel braces between struts Tack glue hatch block place 32 Model Aviation sand everything shape top wing mounting brackets will installed after wing assembly Finally desired may use 15-in Halco-type landing gear place shown Just substitute piece /4 ply place ofthe torsion blocks bolt gear place Wings Construction conventional therefore will dwell key points bottom wing built over plan straightforward However note panels joined after construction during After constructing bottom panels slight bevel sanded root rib panel proper dihedral Block up tip rib Position panel flush along edge bench block sander sand bevel using edge workbench guide Repeat other panel gives inch total dihedral Butt join panels epoxy making sure rib centerlines match After cures cut away center rib shown servo box Add /s ply braces front rear shown also serve front rear servo box faces done add center sheeting cut sheeting center Because shallow dihedral angle isnt necessary Just pin down dry cut out servo box add front /4 dowel glue cap-strips install torque rods ailerons tips top wing built similarly except hold-down nut blocks no di hedral plans show necessary changes made Note interplane strut boxes bottom top wing Top Wing Mounting Using center chord line wing reference line very carefully measure mounting hole cen ters front rear Drill tap -20 holes Bolt mounting brackets wing firmly making sure inside edges parallel center chord line wing Now set wing cabane struts bracket should out side incidence 0 degrees set sliding wing fore aft until cen ter leading edge center trailing edge measure same Use upper edge fuselage thrust line measuring reference correctly aligned moving anything mark holes mounting brackets cabane struts Next remove brack ets wing Now drill 4/40 clear ance holes points just marked Bolt brackets cabane struts using 4-40 x /8 bolts blind nuts turned out Tighten down epoxy well prevent loosening interplane struts laminated 1/16 ply core 1/16 balsa either side Notch out install epoxy upper mounting brackets sure make right left bracket Using #4 sheet metal screws mount struts top wing Next put bottom wing December1975 33 Gremlin fuselage set top wing Bolt down -20 nylon screws did everything right point distance between wing tips should pretty close same Mine didnt come out too close found out later shelf corner brackets used mount top wing didnt have necessary 90degree angle So check first should home free Once equal spacing obtained mark location notch out install bottom strut mounting brackets Tail Surfaces Nothing fancy Just um sheet balsa Take care elevators assembled flat sur face may end up undesira ble built-in turn suggest mounting both wings installing stab fin assemblies greatly aids alignment Finish I could cop out say finish own taste Im sure younger modelers may know tried true finish Nothing fantastic mind goes easy looks good 1 Fill dings dents etc using favorite filler 2 Sand whole mess down 400grit sandpaper 3 Brush two coats clear dope full strength sanding 400-grit sand paper between coats 4 Cover wings rear fuselage area whatever have handy silk Silkspan Coverite etc Take care covering goes smoothly 34 Model Aviation Old reliable Fox 59 up front pic Takes Dubro muffel-air pressure fitting keep engine running both smoothly quietly minimum wrinkles fill grain 50 percent thinned clear dope About four coats should 5 Spray two coats favorite color Add trim method provides light finish trifle time-consuming de sire use Monokote Solarfilm Elitecoat Flying Now comes fun part flying sure CG shown plans overly sensitive CG placement position seems about right Check double check radio installa tion proper foam padding around battery pack receiver Check Kwik-links time Also check havent hooked up control back ward happens best Range check radio engine running should done new bird radio worked good plane took out Gremlin will handle wide range power strong 35 howling 61 take pick flight perform ance will depend power choose Take-offs straight true smaller engines sure have flying speed before lift-off adjust transmitter trim need orig inal needed two turns right aileron trim due off-center aileron servo hooked up link age have trimmed level flight proceed whatever ability power allows Landings very slow no tendency fall off wing fact calm day can bring low slow set tail wheel down first mains still few inches off run along another 10 feet before settles Just doesnt want quit larger engines will fly FAI pattern maneuvers added grace two-winger has does excel some maneuvers such knife-edge spins Roll over knife-edge give full top-rudder climb out better 45-degree angle Spins good easy enter count Its descent rate actually seems decrease spin rotation remains constant Got bipe mind Heres rugged sport bit pattern final note flying doubts about method used top wing mount ing therefore felt test its fullest test did have tried least dozen occasions pull wings off has sent full throttle through several hundred feet sky straight down square corner bottom Thus far have unable structural damage other maneuver including violent snap rolls original has logged 89 flights article treat gently days Gremlin structurally sound design barring radio failure 400 feet will around long time Its trainer pat tern flyerAbe power choose deter mines its character December 1975 35 Seen down under landing gear auxiliary spreader wire wire wound soldered main struts shows clearly radioHeath gear casemounts through lower wing opening visible just behind landing gear author wishes thank Stan Griffith inspira tion Roscoc Pearson pictures accompany article picture sometimes really worth thousand words Close-up cabane struts fittings easily checked out reference plans Left Jerry firmly flips 11-7 propeller ship tested struc tural integrity dozens straight-down flights through hundreds feet sky followed square corner simulated landing shot makes point landings can quite slow dropping wing can flared until tail wheel touches
Edition: Model Aviation - 1975/12
Page Numbers: 32, 33, 34, 35
Jerry Clifton THE GREMLIN inspired close modeler friend Stan Griffith Stan has liked old-timey-looking air planes years day took couple Falcon 56 wings put fuselage own design came up fine antique-looking two-winger pleasure test flying Stans new bird have homades calls make long story short such genuine pleasure fly decided design biplane did ever want maneuverability well stability thus long nose tail mo ments ground handling thus wide gear able handle engine thus 1000 sq wing area light ness structure original weighed 3 pounds less engine radio also should able handle abuse un trained thumbs well High G pattern maneuvers thus rigid structural design traits incorporated Gremlin Build will pleased red blue trim Gremlin makes good first impression nose-down view surprised its performance concept inspired friend put together two Falcon 56 wings Fox Eagle engine shown plans 35 up OK Below Installation leaves plenty room Fuselage Lets start fuselage since completion top wing depends cabane struts mounting hole alignment Make sure sides match up top edges perfectly straight Add ply doublers aft longerons ones front will added later After has dried mark thrust line former locations inside fuselage sides Glue motor mounts sides top edge mount along thrust line following steps determine wing alignment make sure get righttake time right fuse lage side flat surface accurately mark position cabane strut using strut itself guide same left side Next lay cabane struts fuselage sides check see front bottom edges perpendicular parallel thrust line have cut cabane struts accurately notch bottom strut should line up over F2 former location fits glue down epoxy add racing forward top bottom strips around strut Repeat process left side should end up two perfectly matched sides Using square glue formers F2 F3 place right fuselage side dry remove workbench lay left side down glue sides together Use square keep sides parallel Install Fl using epoxy pins clamps whatever hold together Alignment wont problem make sure Fl flush front sides Draw centerline workbench line should run edge front fuselage can hang over Mark rear cross braces former F3 loca tion across centerline Turn fuse lage upside down position over centerline Pin fuselage down firmly F3 location pull rear end gether hold place clothes pin Glue place both top bottom cross braces Wait dry epoxy tailpost has cured remove fuselage bench Add remainder formers stringers bottom sheeting front cowl blocks nose ring etc point Ill make sheet ing around cabane struts cockpit area trial error type thing although too difficult Just use poster board stiff paper until have pat tern fits Also note sheet must go outside edge fuselage leaves gap along top edge fuse lage base cabane struts Fill gap /4 sq soft balsa trim fuselage contour After sheeting has glued place install /8-in hard wood dowel braces between struts Tack glue hatch block place 32 Model Aviation sand everything shape top wing mounting brackets will installed after wing assembly Finally desired may use 15-in Halco-type landing gear place shown Just substitute piece /4 ply place ofthe torsion blocks bolt gear place Wings Construction conventional therefore will dwell key points bottom wing built over plan straightforward However note panels joined after construction during After constructing bottom panels slight bevel sanded root rib panel proper dihedral Block up tip rib Position panel flush along edge bench block sander sand bevel using edge workbench guide Repeat other panel gives inch total dihedral Butt join panels epoxy making sure rib centerlines match After cures cut away center rib shown servo box Add /s ply braces front rear shown also serve front rear servo box faces done add center sheeting cut sheeting center Because shallow dihedral angle isnt necessary Just pin down dry cut out servo box add front /4 dowel glue cap-strips install torque rods ailerons tips top wing built similarly except hold-down nut blocks no di hedral plans show necessary changes made Note interplane strut boxes bottom top wing Top Wing Mounting Using center chord line wing reference line very carefully measure mounting hole cen ters front rear Drill tap -20 holes Bolt mounting brackets wing firmly making sure inside edges parallel center chord line wing Now set wing cabane struts bracket should out side incidence 0 degrees set sliding wing fore aft until cen ter leading edge center trailing edge measure same Use upper edge fuselage thrust line measuring reference correctly aligned moving anything mark holes mounting brackets cabane struts Next remove brack ets wing Now drill 4/40 clear ance holes points just marked Bolt brackets cabane struts using 4-40 x /8 bolts blind nuts turned out Tighten down epoxy well prevent loosening interplane struts laminated 1/16 ply core 1/16 balsa either side Notch out install epoxy upper mounting brackets sure make right left bracket Using #4 sheet metal screws mount struts top wing Next put bottom wing December1975 33 Gremlin fuselage set top wing Bolt down -20 nylon screws did everything right point distance between wing tips should pretty close same Mine didnt come out too close found out later shelf corner brackets used mount top wing didnt have necessary 90degree angle So check first should home free Once equal spacing obtained mark location notch out install bottom strut mounting brackets Tail Surfaces Nothing fancy Just um sheet balsa Take care elevators assembled flat sur face may end up undesira ble built-in turn suggest mounting both wings installing stab fin assemblies greatly aids alignment Finish I could cop out say finish own taste Im sure younger modelers may know tried true finish Nothing fantastic mind goes easy looks good 1 Fill dings dents etc using favorite filler 2 Sand whole mess down 400grit sandpaper 3 Brush two coats clear dope full strength sanding 400-grit sand paper between coats 4 Cover wings rear fuselage area whatever have handy silk Silkspan Coverite etc Take care covering goes smoothly 34 Model Aviation Old reliable Fox 59 up front pic Takes Dubro muffel-air pressure fitting keep engine running both smoothly quietly minimum wrinkles fill grain 50 percent thinned clear dope About four coats should 5 Spray two coats favorite color Add trim method provides light finish trifle time-consuming de sire use Monokote Solarfilm Elitecoat Flying Now comes fun part flying sure CG shown plans overly sensitive CG placement position seems about right Check double check radio installa tion proper foam padding around battery pack receiver Check Kwik-links time Also check havent hooked up control back ward happens best Range check radio engine running should done new bird radio worked good plane took out Gremlin will handle wide range power strong 35 howling 61 take pick flight perform ance will depend power choose Take-offs straight true smaller engines sure have flying speed before lift-off adjust transmitter trim need orig inal needed two turns right aileron trim due off-center aileron servo hooked up link age have trimmed level flight proceed whatever ability power allows Landings very slow no tendency fall off wing fact calm day can bring low slow set tail wheel down first mains still few inches off run along another 10 feet before settles Just doesnt want quit larger engines will fly FAI pattern maneuvers added grace two-winger has does excel some maneuvers such knife-edge spins Roll over knife-edge give full top-rudder climb out better 45-degree angle Spins good easy enter count Its descent rate actually seems decrease spin rotation remains constant Got bipe mind Heres rugged sport bit pattern final note flying doubts about method used top wing mount ing therefore felt test its fullest test did have tried least dozen occasions pull wings off has sent full throttle through several hundred feet sky straight down square corner bottom Thus far have unable structural damage other maneuver including violent snap rolls original has logged 89 flights article treat gently days Gremlin structurally sound design barring radio failure 400 feet will around long time Its trainer pat tern flyerAbe power choose deter mines its character December 1975 35 Seen down under landing gear auxiliary spreader wire wire wound soldered main struts shows clearly radioHeath gear casemounts through lower wing opening visible just behind landing gear author wishes thank Stan Griffith inspira tion Roscoc Pearson pictures accompany article picture sometimes really worth thousand words Close-up cabane struts fittings easily checked out reference plans Left Jerry firmly flips 11-7 propeller ship tested struc tural integrity dozens straight-down flights through hundreds feet sky followed square corner simulated landing shot makes point landings can quite slow dropping wing can flared until tail wheel touches