THE TRIP model building hang gliders powered flight becoming rather familiar nowadays particularly advent ultralight aircraft industry recent years commercial aircraft have become complex individual design ers rarely given credit work circumstance direct contrast early days aviation individual counted age ultralight has spawned what Walter J Boyne calls second Golden Age Aviation As inflation complexity hiked up price aircraft including smallest Piper Cub types would-be pilots engineers began seek own solution homebuilt aircraft hang gliders ultralights some instances restoration old classics As result finds reappearing phenomenon indi vidual genius imprinted upon design As look around world ultralight Boynes analysis rings particu larly true case Chuck Slusarczyk founder president CGS Avi ation largest reputation advanced manufacturer power C02powered version 1982 winner Best New Design Grand Cham pion Oshkosh should competitive Free Flight Scale full-size version big EAA Fly-In U Larry Kruse plants ultralights As boy Chuck began building later designing model airplanes age 13 K began win model airplane contests over years has accumulated over 400 trophies ribbons AMA-sanc tioned events still retains avid interest model aviation today remem bering what first sparked interest magic flight After high schcol Chuck went fiveyear apprenticeship NASA working such projects B-70 X-1 5 Lunar Orbiter Following stint NASA Chuck joined Scheutzow Heli copter Corporation employed began designing building hang glid ers own As natural evolutionary step early 1 970s Chucks attention turned toward powering hang gliders five-year research development pro gram culminated marketing first commercial reduction-drive unit called CGS Power Hawk accomplishments success Chuck first Power Hawk changed industrys outlcok reduction drives large-diameter pro pellers ultralights Chucks background experience design ability came together 1982 new design CGS Hawk 60 Model Aviation complete reduction-drive unit pusher configuration named Best New Design Grand Champion Osh kosh point became aware design through correspondence knowledgeable man behind Hawk first time saw photo plane struck its perfect proportions modelingthe generous tail volume ample dihedral proportionately roomy abinthe true airplane appear ance industry has reputation spidery-looking creations course corresponding Chuck generosity providing factory drawings photos three-views became aware modeling heri tagealthough cursory look Hawk gives away Although long-range plan construct four-channel RC version plane immediate needs dictated build Free Flight Scale version 1983 National Contest Im pleased say model built quickly flew right off board received top scale points against some excellent competition event Its second-place finish due bad flying judgment part rather inherent problem plane Chuck Slusarczyk has designed winner us whether full-size man-carry ing mode model form Construction CGS Hawk will difficult have built stick-andtissue models before some areas need explanation begin built prototype removable wings wing struts order ease packing several models took Nationals year round trip over 4000 miles car Since modelers wont have face such prob lem Ive drawn wings unit ease construction Certainly time weight will saved simply Hot-Stuffing wings cabin top rather having fiddle aligning wing tubes dihedral wires Opposite page view nawk looks less like uitraiight ilke typicai home-buiit ship Strut-braced wings pusher configuration give uniqueness Top pic ture CO-2 fiiier tube strut wheei pant detalis can seen Above Light shines through wing liluminates muiti-coiored iettering Very pretty craft air Left Dummy engine details Piug wires mag cover inverted Teico CO-2 motor pusher turns clockwise Right Cabin detalis seat seat belt throttie flap controis iett stick middle tip CO-2 tank shows just under front seat Also will noted plan modeluses alotof 1/16 sq basswoodstrips basic outline stringer construction tempted substitute balsa simply does have required strength areas Likewise balsa specified instead basswood use balsa Youll incur unacceptable weight penalties use basswood way construction best source have found basswood local model railroad emporium although some model aircraft hobby dealers beginning stock Fuselage Build side top other separating two layer Saran Wrap Construct fuselage box adding tail boom formers cross members install main landing gear nose gear before planking fuselage buttom Cut fit top nose ballast box lay aside until after test flights successfully accomplished ballast can easily added subtracted tail boom rolled balsa tube prepared soaking 1/16-in C-grain blank shown plans 30 minutes sink full hot water laced cup ammonia balsa soaking cut piece tissue least 2 wider 1 longer balsa blank lay flat tabletop smooth work surface Fish out balsa blank towel-dry removing much excess moisture possible Place squarely center tissue should have minimal tissue overlap 1 side 1 end Using 3/16-in-ID aluminum tube former begin rolling tissue around aluminum tube continuing reachthe balsauntil both tissue balsa wrapped tightly around tube Hold shape ends middle masking tape three four places bake assembly pre-heated 2000 oven 20 min remove moisture set shape balsa After 20 mm carefully remove tissue close up seam balsa starting end gently squeezing together Apply small bead Hot Stuff move end 62 Model Aviation ground rests onlyon main wheels same asthe TuII-SOaIeversIOflI rlmotuweugnI full-size machine drops itto nose wheel propthrust doesthe same model view shows opaque white upper surface wings tail boom tube made balsa ammonia water ImumInini tiuha Full-Size Plans Available. See Page 164 _II1116 SO WINGPLANTOPVIEWBASSWOOD SPARS-TOP S BOTTOM other Thats Insert tail boom seam side down holes main fuselage formers incidence angle should set formers check again laying fuselage structure over plan Make necessary adjustments prior Hot-Stuf fing boom place Re-wet aft end boom squeeze gently together form crimped-tubing effect fullsize plane drop two Hot Stuff will sufficient hold crimp prototype model powered standard Telco CO-2 unit tank placed far forward possible under pilots seat case Drill mounting holes 1/32-in firewall/motor-mountblock assembly test-fit everything position threading tank tubing through fuselage careful avoid kinking tubing Construct seat trim needed slip over tank youve achieved satis factoy fit couple drops Hot Stuff will keep tank tacked cabin floor inthe correct position can install filler nozzle its pressure box choose method An easier way handle filler nozzleand would use futureis simply cut small circular hole bottom floor poke filler nozzle through landing gear ought provide sufficient protection nozzle during landings its too obtrusive poke little bit back up hole until its needed rest cockpit interior may now installed its time construct dummy cylinders muffler fuselage ready covering Wheels wheel pants both laminated stan dard balsa stock shown plan make ROG takeoffs landings concrete asphalt regular basis would suggest adding layer 1/32 ply wheel center core wheels will withstand great deal abuse Flying surfaces wings stabilizer rudder built traditional manner should require little explanation yond notations shown plan conscious areas call bass wood require balsa adjustable double spar rudder stab mandatory would certainly encourage use feature Fiddling shimming warping inexact way making flight adjustments Covering prototype model duplicates color scheme Hawk owned Terry Fuller Conneaut OH descend ing order top fuselage colors black white yellow orange red again black tail boom silver top wing white tissue bottom black banded colors spelling out CGS Hawk simpler color schemes visual appeal wish use ullers color scheme cover fuselage rudder wing white tissue using 5 0/50 mixture white glue water adhesive Cover stabilizer black tissue available Peck-Polymers Shrink tissue rub bing alcohol brush three coats thinned 60/40 nitrate dope Let dope dry least overnight add trim colors laying flat respective positions color time Liberally brush thinner over colored tissue strips letting soak soften doped surface underneath Occasional light finger pressure may necessary get tissue adhere covering Continued page 148 July1985 63 I/16BALSASTRUT LOCATIONI/16 BALSAo BALSAI/I6 BALSA RIBS-GUSSETS \y---I/BLEADING EDGETIP PLATE _ __ __ _____ __ __ __ __ _ _____ _____ _____ _____ _____ ____ _____ _____ II _____ _____ _____ ____ _____ _____ _____ _____ _____3/3GUS/I6 /I _____ VB SO BALSA-1/16I/B SO BALSA TRAILING EDGE1/16 BALSA 3/32 TRAILING EDGE BALSABALSA ---~- NRIBS SOFT WIREI/R I/IARIB ERN3/32 BALSA 1/16 50 BASSWOOD RINSESBALSA6 SHORT RIBS OUTLINE B CENTER I/-IA MED 1/16 BALSA1/16 BALSASCRAP MUFFLERFOR RUDDER BALLAST BOGGUSSETSAND EXHAUSTLE3 LAMS OF -3/32 MED32 INSIDE Y~ CROS I ITELCO CO-2 ENGINE USED ONeIiati FIT-I/IA BASSWOODNOSEGEAR MOUNTA BALSAF-I F2PROTOTYPE TRIM PROP TO FUSELAGEWINDSCREENSHOWN ANGLEDCLEAR TAIL BOOMSTABILIZER FIN RUD LONG ERO N S CROSSPIECES I/IA BALLASTCROASPECES ARE B SO BASSWOOD OUTLINE ENG NE DETAIL-A 50AND CENTER SPARS WRAP WITH I/3D BALSA ALSIIQWGL//___DUNANsHTAS SHOWN 1/32 BALSA GLOCKTAIL SKID CRMPCHUCK SWSARCZYKS I/A BALSAPD1/6 ROLLED BALSA END MAKE 2SHEET TAIL ROOM CGS HAWK ULTRALIGHT WHEEL PANTS-LD ST tuG COVERED WITH 3/32 SEAT DETAILLAMINATE3/32 ELEC WIRE INSULAliONFOR AMA GAS SCALE AS SHOWN0I23DESIGNED B DRAWN BY LARRY KRUSE I/S FUSELAGE SIDE VIEW I ACING BY 30E DEMARCO torque Record torque rpm reading taken just before caught model Make small change trim repeat rpm/torque measurements best trim will setting gives both lowest rpm lowest level-flight torque model slightly under-elevated needs inci dence wing will have slightly higher rpm approximately same level flight torque properly-trimmed model As incidence increased rpm torque will drop lower overelevated model rpm lower good trim torque will higher level-flight torque increases overelevated model because higher torque needed overcome higher drag extra wing incidence Actually model will start sinking faster good trim soon level flight ceases full flight will take longer properly trimmed model reach level flight either under- over-elevated model Wrap-up Heres holds together peak altitude flight depends launch torque altitude vs time curve levels off level-flight torque Unless air temperature air inversion well talk about next time inter venes model will descend slowly torque decreases motor runs out turns before touchdown reaches critical torque model will come down much come several other test procedures allow get trim big meet Im out room Next time Bud Tenny Box 545 Richardson TX 75080 CGS Hawk/Kruse Continued page 63 beneath smooth out wrinkles Three coats thinned nitrate dope top tissue trim should sufficient seal surfaces detailing including seat celluloid windscreens wheel pants struts rigging dummy engine can now added complete model make come alive Flying Balance plane shown plan adding lead shot and/or clay ballast box dont like test glide CO-2powered models because doesnt give much feel ship going perform under power Wait calm evening find softest grass surface can set motor low power setting give gas charge last filler cartridge Flick prop get motor started remember its apusher aim model spot about 50 ft front give gentle toss settles ground stalling diving crease gas charge no liquid yet please try again should show slight tendency climb gently turn right turns too tightly bend rudder just shade left try again power pattern seems safe increase motor speed bit watch climb right come back overhead full gas charge model being hand launched should get flights rang ing 45 sec updepending buoyant air isand quality CO-2 charge Hawk has enjoyable Free Flight Scale ships Ive built number years unique enough elicit both admiration questions spectatorsand competitive enough win Scale contest nation decide build have questions comments please write Larry Kruse Box 1137 Liberal KS 67901 Ill happy supply documentation infor mation cost CL Aerobatics/Fancher Continued page 64 able practical terms CG aft G/L center lift although technically stable rapidly becomes too sensitive RC Ts & Caps Super Quality.Super Price! TSHIRTS 50% cotloni5O% polyester complete range sizes RC hobbiest $595 Styte Ais yellnw hold black design Style B availahle navy white white navy CAPS tits Adjustable back mesh sides Only $595 SPECIAL COMBO OFFER Matching shirt cap set $995! shirt cap per set ORDER TODAY Send check money order US Please indicate size style cnlor Include $2 postage handling per item Florida residents add 5% sales tax Allew 4-6 weeks delivery IS YOUR CLUB LOOKING FOR FUNDRAISER ASK ABOUT OUR CLUB DISCOUNT PROGRAM RC NOVELTIES PO BOX 840205 PEMBROKE PINES FLORIDA 33084 TICK OFF TIMER Now Available 0-20 Seconds Fuel shut off Flood Off Auto rudder function Weight V oz Fuel line included EXTRA FUEL LINE TUmINGSO- ft DIRECT ORDER ON LV Send Cash Check MD COD $3 extra Calif 6% JOHN TATONE 62 BELHAVEN AVE DALY CITY CA 94015 Limited supply 148 Model Aviation faster Jim Clem coined appropriate phrasethe model becomes lead sled has push prop
Edition: Model Aviation - 1985/07
Page Numbers: 60, 61, 62, 63, 148
THE TRIP model building hang gliders powered flight becoming rather familiar nowadays particularly advent ultralight aircraft industry recent years commercial aircraft have become complex individual design ers rarely given credit work circumstance direct contrast early days aviation individual counted age ultralight has spawned what Walter J Boyne calls second Golden Age Aviation As inflation complexity hiked up price aircraft including smallest Piper Cub types would-be pilots engineers began seek own solution homebuilt aircraft hang gliders ultralights some instances restoration old classics As result finds reappearing phenomenon indi vidual genius imprinted upon design As look around world ultralight Boynes analysis rings particu larly true case Chuck Slusarczyk founder president CGS Avi ation largest reputation advanced manufacturer power C02powered version 1982 winner Best New Design Grand Cham pion Oshkosh should competitive Free Flight Scale full-size version big EAA Fly-In U Larry Kruse plants ultralights As boy Chuck began building later designing model airplanes age 13 K began win model airplane contests over years has accumulated over 400 trophies ribbons AMA-sanc tioned events still retains avid interest model aviation today remem bering what first sparked interest magic flight After high schcol Chuck went fiveyear apprenticeship NASA working such projects B-70 X-1 5 Lunar Orbiter Following stint NASA Chuck joined Scheutzow Heli copter Corporation employed began designing building hang glid ers own As natural evolutionary step early 1 970s Chucks attention turned toward powering hang gliders five-year research development pro gram culminated marketing first commercial reduction-drive unit called CGS Power Hawk accomplishments success Chuck first Power Hawk changed industrys outlcok reduction drives large-diameter pro pellers ultralights Chucks background experience design ability came together 1982 new design CGS Hawk 60 Model Aviation complete reduction-drive unit pusher configuration named Best New Design Grand Champion Osh kosh point became aware design through correspondence knowledgeable man behind Hawk first time saw photo plane struck its perfect proportions modelingthe generous tail volume ample dihedral proportionately roomy abinthe true airplane appear ance industry has reputation spidery-looking creations course corresponding Chuck generosity providing factory drawings photos three-views became aware modeling heri tagealthough cursory look Hawk gives away Although long-range plan construct four-channel RC version plane immediate needs dictated build Free Flight Scale version 1983 National Contest Im pleased say model built quickly flew right off board received top scale points against some excellent competition event Its second-place finish due bad flying judgment part rather inherent problem plane Chuck Slusarczyk has designed winner us whether full-size man-carry ing mode model form Construction CGS Hawk will difficult have built stick-andtissue models before some areas need explanation begin built prototype removable wings wing struts order ease packing several models took Nationals year round trip over 4000 miles car Since modelers wont have face such prob lem Ive drawn wings unit ease construction Certainly time weight will saved simply Hot-Stuffing wings cabin top rather having fiddle aligning wing tubes dihedral wires Opposite page view nawk looks less like uitraiight ilke typicai home-buiit ship Strut-braced wings pusher configuration give uniqueness Top pic ture CO-2 fiiier tube strut wheei pant detalis can seen Above Light shines through wing liluminates muiti-coiored iettering Very pretty craft air Left Dummy engine details Piug wires mag cover inverted Teico CO-2 motor pusher turns clockwise Right Cabin detalis seat seat belt throttie flap controis iett stick middle tip CO-2 tank shows just under front seat Also will noted plan modeluses alotof 1/16 sq basswoodstrips basic outline stringer construction tempted substitute balsa simply does have required strength areas Likewise balsa specified instead basswood use balsa Youll incur unacceptable weight penalties use basswood way construction best source have found basswood local model railroad emporium although some model aircraft hobby dealers beginning stock Fuselage Build side top other separating two layer Saran Wrap Construct fuselage box adding tail boom formers cross members install main landing gear nose gear before planking fuselage buttom Cut fit top nose ballast box lay aside until after test flights successfully accomplished ballast can easily added subtracted tail boom rolled balsa tube prepared soaking 1/16-in C-grain blank shown plans 30 minutes sink full hot water laced cup ammonia balsa soaking cut piece tissue least 2 wider 1 longer balsa blank lay flat tabletop smooth work surface Fish out balsa blank towel-dry removing much excess moisture possible Place squarely center tissue should have minimal tissue overlap 1 side 1 end Using 3/16-in-ID aluminum tube former begin rolling tissue around aluminum tube continuing reachthe balsauntil both tissue balsa wrapped tightly around tube Hold shape ends middle masking tape three four places bake assembly pre-heated 2000 oven 20 min remove moisture set shape balsa After 20 mm carefully remove tissue close up seam balsa starting end gently squeezing together Apply small bead Hot Stuff move end 62 Model Aviation ground rests onlyon main wheels same asthe TuII-SOaIeversIOflI rlmotuweugnI full-size machine drops itto nose wheel propthrust doesthe same model view shows opaque white upper surface wings tail boom tube made balsa ammonia water ImumInini tiuha Full-Size Plans Available. See Page 164 _II1116 SO WINGPLANTOPVIEWBASSWOOD SPARS-TOP S BOTTOM other Thats Insert tail boom seam side down holes main fuselage formers incidence angle should set formers check again laying fuselage structure over plan Make necessary adjustments prior Hot-Stuf fing boom place Re-wet aft end boom squeeze gently together form crimped-tubing effect fullsize plane drop two Hot Stuff will sufficient hold crimp prototype model powered standard Telco CO-2 unit tank placed far forward possible under pilots seat case Drill mounting holes 1/32-in firewall/motor-mountblock assembly test-fit everything position threading tank tubing through fuselage careful avoid kinking tubing Construct seat trim needed slip over tank youve achieved satis factoy fit couple drops Hot Stuff will keep tank tacked cabin floor inthe correct position can install filler nozzle its pressure box choose method An easier way handle filler nozzleand would use futureis simply cut small circular hole bottom floor poke filler nozzle through landing gear ought provide sufficient protection nozzle during landings its too obtrusive poke little bit back up hole until its needed rest cockpit interior may now installed its time construct dummy cylinders muffler fuselage ready covering Wheels wheel pants both laminated stan dard balsa stock shown plan make ROG takeoffs landings concrete asphalt regular basis would suggest adding layer 1/32 ply wheel center core wheels will withstand great deal abuse Flying surfaces wings stabilizer rudder built traditional manner should require little explanation yond notations shown plan conscious areas call bass wood require balsa adjustable double spar rudder stab mandatory would certainly encourage use feature Fiddling shimming warping inexact way making flight adjustments Covering prototype model duplicates color scheme Hawk owned Terry Fuller Conneaut OH descend ing order top fuselage colors black white yellow orange red again black tail boom silver top wing white tissue bottom black banded colors spelling out CGS Hawk simpler color schemes visual appeal wish use ullers color scheme cover fuselage rudder wing white tissue using 5 0/50 mixture white glue water adhesive Cover stabilizer black tissue available Peck-Polymers Shrink tissue rub bing alcohol brush three coats thinned 60/40 nitrate dope Let dope dry least overnight add trim colors laying flat respective positions color time Liberally brush thinner over colored tissue strips letting soak soften doped surface underneath Occasional light finger pressure may necessary get tissue adhere covering Continued page 148 July1985 63 I/16BALSASTRUT LOCATIONI/16 BALSAo BALSAI/I6 BALSA RIBS-GUSSETS \y---I/BLEADING EDGETIP PLATE _ __ __ _____ __ __ __ __ _ _____ _____ _____ _____ _____ ____ _____ _____ II _____ _____ _____ ____ _____ _____ _____ _____ _____3/3GUS/I6 /I _____ VB SO BALSA-1/16I/B SO BALSA TRAILING EDGE1/16 BALSA 3/32 TRAILING EDGE BALSABALSA ---~- NRIBS SOFT WIREI/R I/IARIB ERN3/32 BALSA 1/16 50 BASSWOOD RINSESBALSA6 SHORT RIBS OUTLINE B CENTER I/-IA MED 1/16 BALSA1/16 BALSASCRAP MUFFLERFOR RUDDER BALLAST BOGGUSSETSAND EXHAUSTLE3 LAMS OF -3/32 MED32 INSIDE Y~ CROS I ITELCO CO-2 ENGINE USED ONeIiati FIT-I/IA BASSWOODNOSEGEAR MOUNTA BALSAF-I F2PROTOTYPE TRIM PROP TO FUSELAGEWINDSCREENSHOWN ANGLEDCLEAR TAIL BOOMSTABILIZER FIN RUD LONG ERO N S CROSSPIECES I/IA BALLASTCROASPECES ARE B SO BASSWOOD OUTLINE ENG NE DETAIL-A 50AND CENTER SPARS WRAP WITH I/3D BALSA ALSIIQWGL//___DUNANsHTAS SHOWN 1/32 BALSA GLOCKTAIL SKID CRMPCHUCK SWSARCZYKS I/A BALSAPD1/6 ROLLED BALSA END MAKE 2SHEET TAIL ROOM CGS HAWK ULTRALIGHT WHEEL PANTS-LD ST tuG COVERED WITH 3/32 SEAT DETAILLAMINATE3/32 ELEC WIRE INSULAliONFOR AMA GAS SCALE AS SHOWN0I23DESIGNED B DRAWN BY LARRY KRUSE I/S FUSELAGE SIDE VIEW I ACING BY 30E DEMARCO torque Record torque rpm reading taken just before caught model Make small change trim repeat rpm/torque measurements best trim will setting gives both lowest rpm lowest level-flight torque model slightly under-elevated needs inci dence wing will have slightly higher rpm approximately same level flight torque properly-trimmed model As incidence increased rpm torque will drop lower overelevated model rpm lower good trim torque will higher level-flight torque increases overelevated model because higher torque needed overcome higher drag extra wing incidence Actually model will start sinking faster good trim soon level flight ceases full flight will take longer properly trimmed model reach level flight either under- over-elevated model Wrap-up Heres holds together peak altitude flight depends launch torque altitude vs time curve levels off level-flight torque Unless air temperature air inversion well talk about next time inter venes model will descend slowly torque decreases motor runs out turns before touchdown reaches critical torque model will come down much come several other test procedures allow get trim big meet Im out room Next time Bud Tenny Box 545 Richardson TX 75080 CGS Hawk/Kruse Continued page 63 beneath smooth out wrinkles Three coats thinned nitrate dope top tissue trim should sufficient seal surfaces detailing including seat celluloid windscreens wheel pants struts rigging dummy engine can now added complete model make come alive Flying Balance plane shown plan adding lead shot and/or clay ballast box dont like test glide CO-2powered models because doesnt give much feel ship going perform under power Wait calm evening find softest grass surface can set motor low power setting give gas charge last filler cartridge Flick prop get motor started remember its apusher aim model spot about 50 ft front give gentle toss settles ground stalling diving crease gas charge no liquid yet please try again should show slight tendency climb gently turn right turns too tightly bend rudder just shade left try again power pattern seems safe increase motor speed bit watch climb right come back overhead full gas charge model being hand launched should get flights rang ing 45 sec updepending buoyant air isand quality CO-2 charge Hawk has enjoyable Free Flight Scale ships Ive built number years unique enough elicit both admiration questions spectatorsand competitive enough win Scale contest nation decide build have questions comments please write Larry Kruse Box 1137 Liberal KS 67901 Ill happy supply documentation infor mation cost CL Aerobatics/Fancher Continued page 64 able practical terms CG aft G/L center lift although technically stable rapidly becomes too sensitive RC Ts & Caps Super Quality.Super Price! TSHIRTS 50% cotloni5O% polyester complete range sizes RC hobbiest $595 Styte Ais yellnw hold black design Style B availahle navy white white navy CAPS tits Adjustable back mesh sides Only $595 SPECIAL COMBO OFFER Matching shirt cap set $995! shirt cap per set ORDER TODAY Send check money order US Please indicate size style cnlor Include $2 postage handling per item Florida residents add 5% sales tax Allew 4-6 weeks delivery IS YOUR CLUB LOOKING FOR FUNDRAISER ASK ABOUT OUR CLUB DISCOUNT PROGRAM RC NOVELTIES PO BOX 840205 PEMBROKE PINES FLORIDA 33084 TICK OFF TIMER Now Available 0-20 Seconds Fuel shut off Flood Off Auto rudder function Weight V oz Fuel line included EXTRA FUEL LINE TUmINGSO- ft DIRECT ORDER ON LV Send Cash Check MD COD $3 extra Calif 6% JOHN TATONE 62 BELHAVEN AVE DALY CITY CA 94015 Limited supply 148 Model Aviation faster Jim Clem coined appropriate phrasethe model becomes lead sled has push prop
Edition: Model Aviation - 1985/07
Page Numbers: 60, 61, 62, 63, 148
THE TRIP model building hang gliders powered flight becoming rather familiar nowadays particularly advent ultralight aircraft industry recent years commercial aircraft have become complex individual design ers rarely given credit work circumstance direct contrast early days aviation individual counted age ultralight has spawned what Walter J Boyne calls second Golden Age Aviation As inflation complexity hiked up price aircraft including smallest Piper Cub types would-be pilots engineers began seek own solution homebuilt aircraft hang gliders ultralights some instances restoration old classics As result finds reappearing phenomenon indi vidual genius imprinted upon design As look around world ultralight Boynes analysis rings particu larly true case Chuck Slusarczyk founder president CGS Avi ation largest reputation advanced manufacturer power C02powered version 1982 winner Best New Design Grand Cham pion Oshkosh should competitive Free Flight Scale full-size version big EAA Fly-In U Larry Kruse plants ultralights As boy Chuck began building later designing model airplanes age 13 K began win model airplane contests over years has accumulated over 400 trophies ribbons AMA-sanc tioned events still retains avid interest model aviation today remem bering what first sparked interest magic flight After high schcol Chuck went fiveyear apprenticeship NASA working such projects B-70 X-1 5 Lunar Orbiter Following stint NASA Chuck joined Scheutzow Heli copter Corporation employed began designing building hang glid ers own As natural evolutionary step early 1 970s Chucks attention turned toward powering hang gliders five-year research development pro gram culminated marketing first commercial reduction-drive unit called CGS Power Hawk accomplishments success Chuck first Power Hawk changed industrys outlcok reduction drives large-diameter pro pellers ultralights Chucks background experience design ability came together 1982 new design CGS Hawk 60 Model Aviation complete reduction-drive unit pusher configuration named Best New Design Grand Champion Osh kosh point became aware design through correspondence knowledgeable man behind Hawk first time saw photo plane struck its perfect proportions modelingthe generous tail volume ample dihedral proportionately roomy abinthe true airplane appear ance industry has reputation spidery-looking creations course corresponding Chuck generosity providing factory drawings photos three-views became aware modeling heri tagealthough cursory look Hawk gives away Although long-range plan construct four-channel RC version plane immediate needs dictated build Free Flight Scale version 1983 National Contest Im pleased say model built quickly flew right off board received top scale points against some excellent competition event Its second-place finish due bad flying judgment part rather inherent problem plane Chuck Slusarczyk has designed winner us whether full-size man-carry ing mode model form Construction CGS Hawk will difficult have built stick-andtissue models before some areas need explanation begin built prototype removable wings wing struts order ease packing several models took Nationals year round trip over 4000 miles car Since modelers wont have face such prob lem Ive drawn wings unit ease construction Certainly time weight will saved simply Hot-Stuffing wings cabin top rather having fiddle aligning wing tubes dihedral wires Opposite page view nawk looks less like uitraiight ilke typicai home-buiit ship Strut-braced wings pusher configuration give uniqueness Top pic ture CO-2 fiiier tube strut wheei pant detalis can seen Above Light shines through wing liluminates muiti-coiored iettering Very pretty craft air Left Dummy engine details Piug wires mag cover inverted Teico CO-2 motor pusher turns clockwise Right Cabin detalis seat seat belt throttie flap controis iett stick middle tip CO-2 tank shows just under front seat Also will noted plan modeluses alotof 1/16 sq basswoodstrips basic outline stringer construction tempted substitute balsa simply does have required strength areas Likewise balsa specified instead basswood use balsa Youll incur unacceptable weight penalties use basswood way construction best source have found basswood local model railroad emporium although some model aircraft hobby dealers beginning stock Fuselage Build side top other separating two layer Saran Wrap Construct fuselage box adding tail boom formers cross members install main landing gear nose gear before planking fuselage buttom Cut fit top nose ballast box lay aside until after test flights successfully accomplished ballast can easily added subtracted tail boom rolled balsa tube prepared soaking 1/16-in C-grain blank shown plans 30 minutes sink full hot water laced cup ammonia balsa soaking cut piece tissue least 2 wider 1 longer balsa blank lay flat tabletop smooth work surface Fish out balsa blank towel-dry removing much excess moisture possible Place squarely center tissue should have minimal tissue overlap 1 side 1 end Using 3/16-in-ID aluminum tube former begin rolling tissue around aluminum tube continuing reachthe balsauntil both tissue balsa wrapped tightly around tube Hold shape ends middle masking tape three four places bake assembly pre-heated 2000 oven 20 min remove moisture set shape balsa After 20 mm carefully remove tissue close up seam balsa starting end gently squeezing together Apply small bead Hot Stuff move end 62 Model Aviation ground rests onlyon main wheels same asthe TuII-SOaIeversIOflI rlmotuweugnI full-size machine drops itto nose wheel propthrust doesthe same model view shows opaque white upper surface wings tail boom tube made balsa ammonia water ImumInini tiuha Full-Size Plans Available. See Page 164 _II1116 SO WINGPLANTOPVIEWBASSWOOD SPARS-TOP S BOTTOM other Thats Insert tail boom seam side down holes main fuselage formers incidence angle should set formers check again laying fuselage structure over plan Make necessary adjustments prior Hot-Stuf fing boom place Re-wet aft end boom squeeze gently together form crimped-tubing effect fullsize plane drop two Hot Stuff will sufficient hold crimp prototype model powered standard Telco CO-2 unit tank placed far forward possible under pilots seat case Drill mounting holes 1/32-in firewall/motor-mountblock assembly test-fit everything position threading tank tubing through fuselage careful avoid kinking tubing Construct seat trim needed slip over tank youve achieved satis factoy fit couple drops Hot Stuff will keep tank tacked cabin floor inthe correct position can install filler nozzle its pressure box choose method An easier way handle filler nozzleand would use futureis simply cut small circular hole bottom floor poke filler nozzle through landing gear ought provide sufficient protection nozzle during landings its too obtrusive poke little bit back up hole until its needed rest cockpit interior may now installed its time construct dummy cylinders muffler fuselage ready covering Wheels wheel pants both laminated stan dard balsa stock shown plan make ROG takeoffs landings concrete asphalt regular basis would suggest adding layer 1/32 ply wheel center core wheels will withstand great deal abuse Flying surfaces wings stabilizer rudder built traditional manner should require little explanation yond notations shown plan conscious areas call bass wood require balsa adjustable double spar rudder stab mandatory would certainly encourage use feature Fiddling shimming warping inexact way making flight adjustments Covering prototype model duplicates color scheme Hawk owned Terry Fuller Conneaut OH descend ing order top fuselage colors black white yellow orange red again black tail boom silver top wing white tissue bottom black banded colors spelling out CGS Hawk simpler color schemes visual appeal wish use ullers color scheme cover fuselage rudder wing white tissue using 5 0/50 mixture white glue water adhesive Cover stabilizer black tissue available Peck-Polymers Shrink tissue rub bing alcohol brush three coats thinned 60/40 nitrate dope Let dope dry least overnight add trim colors laying flat respective positions color time Liberally brush thinner over colored tissue strips letting soak soften doped surface underneath Occasional light finger pressure may necessary get tissue adhere covering Continued page 148 July1985 63 I/16BALSASTRUT LOCATIONI/16 BALSAo BALSAI/I6 BALSA RIBS-GUSSETS \y---I/BLEADING EDGETIP PLATE _ __ __ _____ __ __ __ __ _ _____ _____ _____ _____ _____ ____ _____ _____ II _____ _____ _____ ____ _____ _____ _____ _____ _____3/3GUS/I6 /I _____ VB SO BALSA-1/16I/B SO BALSA TRAILING EDGE1/16 BALSA 3/32 TRAILING EDGE BALSABALSA ---~- NRIBS SOFT WIREI/R I/IARIB ERN3/32 BALSA 1/16 50 BASSWOOD RINSESBALSA6 SHORT RIBS OUTLINE B CENTER I/-IA MED 1/16 BALSA1/16 BALSASCRAP MUFFLERFOR RUDDER BALLAST BOGGUSSETSAND EXHAUSTLE3 LAMS OF -3/32 MED32 INSIDE Y~ CROS I ITELCO CO-2 ENGINE USED ONeIiati FIT-I/IA BASSWOODNOSEGEAR MOUNTA BALSAF-I F2PROTOTYPE TRIM PROP TO FUSELAGEWINDSCREENSHOWN ANGLEDCLEAR TAIL BOOMSTABILIZER FIN RUD LONG ERO N S CROSSPIECES I/IA BALLASTCROASPECES ARE B SO BASSWOOD OUTLINE ENG NE DETAIL-A 50AND CENTER SPARS WRAP WITH I/3D BALSA ALSIIQWGL//___DUNANsHTAS SHOWN 1/32 BALSA GLOCKTAIL SKID CRMPCHUCK SWSARCZYKS I/A BALSAPD1/6 ROLLED BALSA END MAKE 2SHEET TAIL ROOM CGS HAWK ULTRALIGHT WHEEL PANTS-LD ST tuG COVERED WITH 3/32 SEAT DETAILLAMINATE3/32 ELEC WIRE INSULAliONFOR AMA GAS SCALE AS SHOWN0I23DESIGNED B DRAWN BY LARRY KRUSE I/S FUSELAGE SIDE VIEW I ACING BY 30E DEMARCO torque Record torque rpm reading taken just before caught model Make small change trim repeat rpm/torque measurements best trim will setting gives both lowest rpm lowest level-flight torque model slightly under-elevated needs inci dence wing will have slightly higher rpm approximately same level flight torque properly-trimmed model As incidence increased rpm torque will drop lower overelevated model rpm lower good trim torque will higher level-flight torque increases overelevated model because higher torque needed overcome higher drag extra wing incidence Actually model will start sinking faster good trim soon level flight ceases full flight will take longer properly trimmed model reach level flight either under- over-elevated model Wrap-up Heres holds together peak altitude flight depends launch torque altitude vs time curve levels off level-flight torque Unless air temperature air inversion well talk about next time inter venes model will descend slowly torque decreases motor runs out turns before touchdown reaches critical torque model will come down much come several other test procedures allow get trim big meet Im out room Next time Bud Tenny Box 545 Richardson TX 75080 CGS Hawk/Kruse Continued page 63 beneath smooth out wrinkles Three coats thinned nitrate dope top tissue trim should sufficient seal surfaces detailing including seat celluloid windscreens wheel pants struts rigging dummy engine can now added complete model make come alive Flying Balance plane shown plan adding lead shot and/or clay ballast box dont like test glide CO-2powered models because doesnt give much feel ship going perform under power Wait calm evening find softest grass surface can set motor low power setting give gas charge last filler cartridge Flick prop get motor started remember its apusher aim model spot about 50 ft front give gentle toss settles ground stalling diving crease gas charge no liquid yet please try again should show slight tendency climb gently turn right turns too tightly bend rudder just shade left try again power pattern seems safe increase motor speed bit watch climb right come back overhead full gas charge model being hand launched should get flights rang ing 45 sec updepending buoyant air isand quality CO-2 charge Hawk has enjoyable Free Flight Scale ships Ive built number years unique enough elicit both admiration questions spectatorsand competitive enough win Scale contest nation decide build have questions comments please write Larry Kruse Box 1137 Liberal KS 67901 Ill happy supply documentation infor mation cost CL Aerobatics/Fancher Continued page 64 able practical terms CG aft G/L center lift although technically stable rapidly becomes too sensitive RC Ts & Caps Super Quality.Super Price! TSHIRTS 50% cotloni5O% polyester complete range sizes RC hobbiest $595 Styte Ais yellnw hold black design Style B availahle navy white white navy CAPS tits Adjustable back mesh sides Only $595 SPECIAL COMBO OFFER Matching shirt cap set $995! shirt cap per set ORDER TODAY Send check money order US Please indicate size style cnlor Include $2 postage handling per item Florida residents add 5% sales tax Allew 4-6 weeks delivery IS YOUR CLUB LOOKING FOR FUNDRAISER ASK ABOUT OUR CLUB DISCOUNT PROGRAM RC NOVELTIES PO BOX 840205 PEMBROKE PINES FLORIDA 33084 TICK OFF TIMER Now Available 0-20 Seconds Fuel shut off Flood Off Auto rudder function Weight V oz Fuel line included EXTRA FUEL LINE TUmINGSO- ft DIRECT ORDER ON LV Send Cash Check MD COD $3 extra Calif 6% JOHN TATONE 62 BELHAVEN AVE DALY CITY CA 94015 Limited supply 148 Model Aviation faster Jim Clem coined appropriate phrasethe model becomes lead sled has push prop
Edition: Model Aviation - 1985/07
Page Numbers: 60, 61, 62, 63, 148
THE TRIP model building hang gliders powered flight becoming rather familiar nowadays particularly advent ultralight aircraft industry recent years commercial aircraft have become complex individual design ers rarely given credit work circumstance direct contrast early days aviation individual counted age ultralight has spawned what Walter J Boyne calls second Golden Age Aviation As inflation complexity hiked up price aircraft including smallest Piper Cub types would-be pilots engineers began seek own solution homebuilt aircraft hang gliders ultralights some instances restoration old classics As result finds reappearing phenomenon indi vidual genius imprinted upon design As look around world ultralight Boynes analysis rings particu larly true case Chuck Slusarczyk founder president CGS Avi ation largest reputation advanced manufacturer power C02powered version 1982 winner Best New Design Grand Cham pion Oshkosh should competitive Free Flight Scale full-size version big EAA Fly-In U Larry Kruse plants ultralights As boy Chuck began building later designing model airplanes age 13 K began win model airplane contests over years has accumulated over 400 trophies ribbons AMA-sanc tioned events still retains avid interest model aviation today remem bering what first sparked interest magic flight After high schcol Chuck went fiveyear apprenticeship NASA working such projects B-70 X-1 5 Lunar Orbiter Following stint NASA Chuck joined Scheutzow Heli copter Corporation employed began designing building hang glid ers own As natural evolutionary step early 1 970s Chucks attention turned toward powering hang gliders five-year research development pro gram culminated marketing first commercial reduction-drive unit called CGS Power Hawk accomplishments success Chuck first Power Hawk changed industrys outlcok reduction drives large-diameter pro pellers ultralights Chucks background experience design ability came together 1982 new design CGS Hawk 60 Model Aviation complete reduction-drive unit pusher configuration named Best New Design Grand Champion Osh kosh point became aware design through correspondence knowledgeable man behind Hawk first time saw photo plane struck its perfect proportions modelingthe generous tail volume ample dihedral proportionately roomy abinthe true airplane appear ance industry has reputation spidery-looking creations course corresponding Chuck generosity providing factory drawings photos three-views became aware modeling heri tagealthough cursory look Hawk gives away Although long-range plan construct four-channel RC version plane immediate needs dictated build Free Flight Scale version 1983 National Contest Im pleased say model built quickly flew right off board received top scale points against some excellent competition event Its second-place finish due bad flying judgment part rather inherent problem plane Chuck Slusarczyk has designed winner us whether full-size man-carry ing mode model form Construction CGS Hawk will difficult have built stick-andtissue models before some areas need explanation begin built prototype removable wings wing struts order ease packing several models took Nationals year round trip over 4000 miles car Since modelers wont have face such prob lem Ive drawn wings unit ease construction Certainly time weight will saved simply Hot-Stuffing wings cabin top rather having fiddle aligning wing tubes dihedral wires Opposite page view nawk looks less like uitraiight ilke typicai home-buiit ship Strut-braced wings pusher configuration give uniqueness Top pic ture CO-2 fiiier tube strut wheei pant detalis can seen Above Light shines through wing liluminates muiti-coiored iettering Very pretty craft air Left Dummy engine details Piug wires mag cover inverted Teico CO-2 motor pusher turns clockwise Right Cabin detalis seat seat belt throttie flap controis iett stick middle tip CO-2 tank shows just under front seat Also will noted plan modeluses alotof 1/16 sq basswoodstrips basic outline stringer construction tempted substitute balsa simply does have required strength areas Likewise balsa specified instead basswood use balsa Youll incur unacceptable weight penalties use basswood way construction best source have found basswood local model railroad emporium although some model aircraft hobby dealers beginning stock Fuselage Build side top other separating two layer Saran Wrap Construct fuselage box adding tail boom formers cross members install main landing gear nose gear before planking fuselage buttom Cut fit top nose ballast box lay aside until after test flights successfully accomplished ballast can easily added subtracted tail boom rolled balsa tube prepared soaking 1/16-in C-grain blank shown plans 30 minutes sink full hot water laced cup ammonia balsa soaking cut piece tissue least 2 wider 1 longer balsa blank lay flat tabletop smooth work surface Fish out balsa blank towel-dry removing much excess moisture possible Place squarely center tissue should have minimal tissue overlap 1 side 1 end Using 3/16-in-ID aluminum tube former begin rolling tissue around aluminum tube continuing reachthe balsauntil both tissue balsa wrapped tightly around tube Hold shape ends middle masking tape three four places bake assembly pre-heated 2000 oven 20 min remove moisture set shape balsa After 20 mm carefully remove tissue close up seam balsa starting end gently squeezing together Apply small bead Hot Stuff move end 62 Model Aviation ground rests onlyon main wheels same asthe TuII-SOaIeversIOflI rlmotuweugnI full-size machine drops itto nose wheel propthrust doesthe same model view shows opaque white upper surface wings tail boom tube made balsa ammonia water ImumInini tiuha Full-Size Plans Available. See Page 164 _II1116 SO WINGPLANTOPVIEWBASSWOOD SPARS-TOP S BOTTOM other Thats Insert tail boom seam side down holes main fuselage formers incidence angle should set formers check again laying fuselage structure over plan Make necessary adjustments prior Hot-Stuf fing boom place Re-wet aft end boom squeeze gently together form crimped-tubing effect fullsize plane drop two Hot Stuff will sufficient hold crimp prototype model powered standard Telco CO-2 unit tank placed far forward possible under pilots seat case Drill mounting holes 1/32-in firewall/motor-mountblock assembly test-fit everything position threading tank tubing through fuselage careful avoid kinking tubing Construct seat trim needed slip over tank youve achieved satis factoy fit couple drops Hot Stuff will keep tank tacked cabin floor inthe correct position can install filler nozzle its pressure box choose method An easier way handle filler nozzleand would use futureis simply cut small circular hole bottom floor poke filler nozzle through landing gear ought provide sufficient protection nozzle during landings its too obtrusive poke little bit back up hole until its needed rest cockpit interior may now installed its time construct dummy cylinders muffler fuselage ready covering Wheels wheel pants both laminated stan dard balsa stock shown plan make ROG takeoffs landings concrete asphalt regular basis would suggest adding layer 1/32 ply wheel center core wheels will withstand great deal abuse Flying surfaces wings stabilizer rudder built traditional manner should require little explanation yond notations shown plan conscious areas call bass wood require balsa adjustable double spar rudder stab mandatory would certainly encourage use feature Fiddling shimming warping inexact way making flight adjustments Covering prototype model duplicates color scheme Hawk owned Terry Fuller Conneaut OH descend ing order top fuselage colors black white yellow orange red again black tail boom silver top wing white tissue bottom black banded colors spelling out CGS Hawk simpler color schemes visual appeal wish use ullers color scheme cover fuselage rudder wing white tissue using 5 0/50 mixture white glue water adhesive Cover stabilizer black tissue available Peck-Polymers Shrink tissue rub bing alcohol brush three coats thinned 60/40 nitrate dope Let dope dry least overnight add trim colors laying flat respective positions color time Liberally brush thinner over colored tissue strips letting soak soften doped surface underneath Occasional light finger pressure may necessary get tissue adhere covering Continued page 148 July1985 63 I/16BALSASTRUT LOCATIONI/16 BALSAo BALSAI/I6 BALSA RIBS-GUSSETS \y---I/BLEADING EDGETIP PLATE _ __ __ _____ __ __ __ __ _ _____ _____ _____ _____ _____ ____ _____ _____ II _____ _____ _____ ____ _____ _____ _____ _____ _____3/3GUS/I6 /I _____ VB SO BALSA-1/16I/B SO BALSA TRAILING EDGE1/16 BALSA 3/32 TRAILING EDGE BALSABALSA ---~- NRIBS SOFT WIREI/R I/IARIB ERN3/32 BALSA 1/16 50 BASSWOOD RINSESBALSA6 SHORT RIBS OUTLINE B CENTER I/-IA MED 1/16 BALSA1/16 BALSASCRAP MUFFLERFOR RUDDER BALLAST BOGGUSSETSAND EXHAUSTLE3 LAMS OF -3/32 MED32 INSIDE Y~ CROS I ITELCO CO-2 ENGINE USED ONeIiati FIT-I/IA BASSWOODNOSEGEAR MOUNTA BALSAF-I F2PROTOTYPE TRIM PROP TO FUSELAGEWINDSCREENSHOWN ANGLEDCLEAR TAIL BOOMSTABILIZER FIN RUD LONG ERO N S CROSSPIECES I/IA BALLASTCROASPECES ARE B SO BASSWOOD OUTLINE ENG NE DETAIL-A 50AND CENTER SPARS WRAP WITH I/3D BALSA ALSIIQWGL//___DUNANsHTAS SHOWN 1/32 BALSA GLOCKTAIL SKID CRMPCHUCK SWSARCZYKS I/A BALSAPD1/6 ROLLED BALSA END MAKE 2SHEET TAIL ROOM CGS HAWK ULTRALIGHT WHEEL PANTS-LD ST tuG COVERED WITH 3/32 SEAT DETAILLAMINATE3/32 ELEC WIRE INSULAliONFOR AMA GAS SCALE AS SHOWN0I23DESIGNED B DRAWN BY LARRY KRUSE I/S FUSELAGE SIDE VIEW I ACING BY 30E DEMARCO torque Record torque rpm reading taken just before caught model Make small change trim repeat rpm/torque measurements best trim will setting gives both lowest rpm lowest level-flight torque model slightly under-elevated needs inci dence wing will have slightly higher rpm approximately same level flight torque properly-trimmed model As incidence increased rpm torque will drop lower overelevated model rpm lower good trim torque will higher level-flight torque increases overelevated model because higher torque needed overcome higher drag extra wing incidence Actually model will start sinking faster good trim soon level flight ceases full flight will take longer properly trimmed model reach level flight either under- over-elevated model Wrap-up Heres holds together peak altitude flight depends launch torque altitude vs time curve levels off level-flight torque Unless air temperature air inversion well talk about next time inter venes model will descend slowly torque decreases motor runs out turns before touchdown reaches critical torque model will come down much come several other test procedures allow get trim big meet Im out room Next time Bud Tenny Box 545 Richardson TX 75080 CGS Hawk/Kruse Continued page 63 beneath smooth out wrinkles Three coats thinned nitrate dope top tissue trim should sufficient seal surfaces detailing including seat celluloid windscreens wheel pants struts rigging dummy engine can now added complete model make come alive Flying Balance plane shown plan adding lead shot and/or clay ballast box dont like test glide CO-2powered models because doesnt give much feel ship going perform under power Wait calm evening find softest grass surface can set motor low power setting give gas charge last filler cartridge Flick prop get motor started remember its apusher aim model spot about 50 ft front give gentle toss settles ground stalling diving crease gas charge no liquid yet please try again should show slight tendency climb gently turn right turns too tightly bend rudder just shade left try again power pattern seems safe increase motor speed bit watch climb right come back overhead full gas charge model being hand launched should get flights rang ing 45 sec updepending buoyant air isand quality CO-2 charge Hawk has enjoyable Free Flight Scale ships Ive built number years unique enough elicit both admiration questions spectatorsand competitive enough win Scale contest nation decide build have questions comments please write Larry Kruse Box 1137 Liberal KS 67901 Ill happy supply documentation infor mation cost CL Aerobatics/Fancher Continued page 64 able practical terms CG aft G/L center lift although technically stable rapidly becomes too sensitive RC Ts & Caps Super Quality.Super Price! TSHIRTS 50% cotloni5O% polyester complete range sizes RC hobbiest $595 Styte Ais yellnw hold black design Style B availahle navy white white navy CAPS tits Adjustable back mesh sides Only $595 SPECIAL COMBO OFFER Matching shirt cap set $995! shirt cap per set ORDER TODAY Send check money order US Please indicate size style cnlor Include $2 postage handling per item Florida residents add 5% sales tax Allew 4-6 weeks delivery IS YOUR CLUB LOOKING FOR FUNDRAISER ASK ABOUT OUR CLUB DISCOUNT PROGRAM RC NOVELTIES PO BOX 840205 PEMBROKE PINES FLORIDA 33084 TICK OFF TIMER Now Available 0-20 Seconds Fuel shut off Flood Off Auto rudder function Weight V oz Fuel line included EXTRA FUEL LINE TUmINGSO- ft DIRECT ORDER ON LV Send Cash Check MD COD $3 extra Calif 6% JOHN TATONE 62 BELHAVEN AVE DALY CITY CA 94015 Limited supply 148 Model Aviation faster Jim Clem coined appropriate phrasethe model becomes lead sled has push prop
Edition: Model Aviation - 1985/07
Page Numbers: 60, 61, 62, 63, 148
THE TRIP model building hang gliders powered flight becoming rather familiar nowadays particularly advent ultralight aircraft industry recent years commercial aircraft have become complex individual design ers rarely given credit work circumstance direct contrast early days aviation individual counted age ultralight has spawned what Walter J Boyne calls second Golden Age Aviation As inflation complexity hiked up price aircraft including smallest Piper Cub types would-be pilots engineers began seek own solution homebuilt aircraft hang gliders ultralights some instances restoration old classics As result finds reappearing phenomenon indi vidual genius imprinted upon design As look around world ultralight Boynes analysis rings particu larly true case Chuck Slusarczyk founder president CGS Avi ation largest reputation advanced manufacturer power C02powered version 1982 winner Best New Design Grand Cham pion Oshkosh should competitive Free Flight Scale full-size version big EAA Fly-In U Larry Kruse plants ultralights As boy Chuck began building later designing model airplanes age 13 K began win model airplane contests over years has accumulated over 400 trophies ribbons AMA-sanc tioned events still retains avid interest model aviation today remem bering what first sparked interest magic flight After high schcol Chuck went fiveyear apprenticeship NASA working such projects B-70 X-1 5 Lunar Orbiter Following stint NASA Chuck joined Scheutzow Heli copter Corporation employed began designing building hang glid ers own As natural evolutionary step early 1 970s Chucks attention turned toward powering hang gliders five-year research development pro gram culminated marketing first commercial reduction-drive unit called CGS Power Hawk accomplishments success Chuck first Power Hawk changed industrys outlcok reduction drives large-diameter pro pellers ultralights Chucks background experience design ability came together 1982 new design CGS Hawk 60 Model Aviation complete reduction-drive unit pusher configuration named Best New Design Grand Champion Osh kosh point became aware design through correspondence knowledgeable man behind Hawk first time saw photo plane struck its perfect proportions modelingthe generous tail volume ample dihedral proportionately roomy abinthe true airplane appear ance industry has reputation spidery-looking creations course corresponding Chuck generosity providing factory drawings photos three-views became aware modeling heri tagealthough cursory look Hawk gives away Although long-range plan construct four-channel RC version plane immediate needs dictated build Free Flight Scale version 1983 National Contest Im pleased say model built quickly flew right off board received top scale points against some excellent competition event Its second-place finish due bad flying judgment part rather inherent problem plane Chuck Slusarczyk has designed winner us whether full-size man-carry ing mode model form Construction CGS Hawk will difficult have built stick-andtissue models before some areas need explanation begin built prototype removable wings wing struts order ease packing several models took Nationals year round trip over 4000 miles car Since modelers wont have face such prob lem Ive drawn wings unit ease construction Certainly time weight will saved simply Hot-Stuffing wings cabin top rather having fiddle aligning wing tubes dihedral wires Opposite page view nawk looks less like uitraiight ilke typicai home-buiit ship Strut-braced wings pusher configuration give uniqueness Top pic ture CO-2 fiiier tube strut wheei pant detalis can seen Above Light shines through wing liluminates muiti-coiored iettering Very pretty craft air Left Dummy engine details Piug wires mag cover inverted Teico CO-2 motor pusher turns clockwise Right Cabin detalis seat seat belt throttie flap controis iett stick middle tip CO-2 tank shows just under front seat Also will noted plan modeluses alotof 1/16 sq basswoodstrips basic outline stringer construction tempted substitute balsa simply does have required strength areas Likewise balsa specified instead basswood use balsa Youll incur unacceptable weight penalties use basswood way construction best source have found basswood local model railroad emporium although some model aircraft hobby dealers beginning stock Fuselage Build side top other separating two layer Saran Wrap Construct fuselage box adding tail boom formers cross members install main landing gear nose gear before planking fuselage buttom Cut fit top nose ballast box lay aside until after test flights successfully accomplished ballast can easily added subtracted tail boom rolled balsa tube prepared soaking 1/16-in C-grain blank shown plans 30 minutes sink full hot water laced cup ammonia balsa soaking cut piece tissue least 2 wider 1 longer balsa blank lay flat tabletop smooth work surface Fish out balsa blank towel-dry removing much excess moisture possible Place squarely center tissue should have minimal tissue overlap 1 side 1 end Using 3/16-in-ID aluminum tube former begin rolling tissue around aluminum tube continuing reachthe balsauntil both tissue balsa wrapped tightly around tube Hold shape ends middle masking tape three four places bake assembly pre-heated 2000 oven 20 min remove moisture set shape balsa After 20 mm carefully remove tissue close up seam balsa starting end gently squeezing together Apply small bead Hot Stuff move end 62 Model Aviation ground rests onlyon main wheels same asthe TuII-SOaIeversIOflI rlmotuweugnI full-size machine drops itto nose wheel propthrust doesthe same model view shows opaque white upper surface wings tail boom tube made balsa ammonia water ImumInini tiuha Full-Size Plans Available. See Page 164 _II1116 SO WINGPLANTOPVIEWBASSWOOD SPARS-TOP S BOTTOM other Thats Insert tail boom seam side down holes main fuselage formers incidence angle should set formers check again laying fuselage structure over plan Make necessary adjustments prior Hot-Stuf fing boom place Re-wet aft end boom squeeze gently together form crimped-tubing effect fullsize plane drop two Hot Stuff will sufficient hold crimp prototype model powered standard Telco CO-2 unit tank placed far forward possible under pilots seat case Drill mounting holes 1/32-in firewall/motor-mountblock assembly test-fit everything position threading tank tubing through fuselage careful avoid kinking tubing Construct seat trim needed slip over tank youve achieved satis factoy fit couple drops Hot Stuff will keep tank tacked cabin floor inthe correct position can install filler nozzle its pressure box choose method An easier way handle filler nozzleand would use futureis simply cut small circular hole bottom floor poke filler nozzle through landing gear ought provide sufficient protection nozzle during landings its too obtrusive poke little bit back up hole until its needed rest cockpit interior may now installed its time construct dummy cylinders muffler fuselage ready covering Wheels wheel pants both laminated stan dard balsa stock shown plan make ROG takeoffs landings concrete asphalt regular basis would suggest adding layer 1/32 ply wheel center core wheels will withstand great deal abuse Flying surfaces wings stabilizer rudder built traditional manner should require little explanation yond notations shown plan conscious areas call bass wood require balsa adjustable double spar rudder stab mandatory would certainly encourage use feature Fiddling shimming warping inexact way making flight adjustments Covering prototype model duplicates color scheme Hawk owned Terry Fuller Conneaut OH descend ing order top fuselage colors black white yellow orange red again black tail boom silver top wing white tissue bottom black banded colors spelling out CGS Hawk simpler color schemes visual appeal wish use ullers color scheme cover fuselage rudder wing white tissue using 5 0/50 mixture white glue water adhesive Cover stabilizer black tissue available Peck-Polymers Shrink tissue rub bing alcohol brush three coats thinned 60/40 nitrate dope Let dope dry least overnight add trim colors laying flat respective positions color time Liberally brush thinner over colored tissue strips letting soak soften doped surface underneath Occasional light finger pressure may necessary get tissue adhere covering Continued page 148 July1985 63 I/16BALSASTRUT LOCATIONI/16 BALSAo BALSAI/I6 BALSA RIBS-GUSSETS \y---I/BLEADING EDGETIP PLATE _ __ __ _____ __ __ __ __ _ _____ _____ _____ _____ _____ ____ _____ _____ II _____ _____ _____ ____ _____ _____ _____ _____ _____3/3GUS/I6 /I _____ VB SO BALSA-1/16I/B SO BALSA TRAILING EDGE1/16 BALSA 3/32 TRAILING EDGE BALSABALSA ---~- NRIBS SOFT WIREI/R I/IARIB ERN3/32 BALSA 1/16 50 BASSWOOD RINSESBALSA6 SHORT RIBS OUTLINE B CENTER I/-IA MED 1/16 BALSA1/16 BALSASCRAP MUFFLERFOR RUDDER BALLAST BOGGUSSETSAND EXHAUSTLE3 LAMS OF -3/32 MED32 INSIDE Y~ CROS I ITELCO CO-2 ENGINE USED ONeIiati FIT-I/IA BASSWOODNOSEGEAR MOUNTA BALSAF-I F2PROTOTYPE TRIM PROP TO FUSELAGEWINDSCREENSHOWN ANGLEDCLEAR TAIL BOOMSTABILIZER FIN RUD LONG ERO N S CROSSPIECES I/IA BALLASTCROASPECES ARE B SO BASSWOOD OUTLINE ENG NE DETAIL-A 50AND CENTER SPARS WRAP WITH I/3D BALSA ALSIIQWGL//___DUNANsHTAS SHOWN 1/32 BALSA GLOCKTAIL SKID CRMPCHUCK SWSARCZYKS I/A BALSAPD1/6 ROLLED BALSA END MAKE 2SHEET TAIL ROOM CGS HAWK ULTRALIGHT WHEEL PANTS-LD ST tuG COVERED WITH 3/32 SEAT DETAILLAMINATE3/32 ELEC WIRE INSULAliONFOR AMA GAS SCALE AS SHOWN0I23DESIGNED B DRAWN BY LARRY KRUSE I/S FUSELAGE SIDE VIEW I ACING BY 30E DEMARCO torque Record torque rpm reading taken just before caught model Make small change trim repeat rpm/torque measurements best trim will setting gives both lowest rpm lowest level-flight torque model slightly under-elevated needs inci dence wing will have slightly higher rpm approximately same level flight torque properly-trimmed model As incidence increased rpm torque will drop lower overelevated model rpm lower good trim torque will higher level-flight torque increases overelevated model because higher torque needed overcome higher drag extra wing incidence Actually model will start sinking faster good trim soon level flight ceases full flight will take longer properly trimmed model reach level flight either under- over-elevated model Wrap-up Heres holds together peak altitude flight depends launch torque altitude vs time curve levels off level-flight torque Unless air temperature air inversion well talk about next time inter venes model will descend slowly torque decreases motor runs out turns before touchdown reaches critical torque model will come down much come several other test procedures allow get trim big meet Im out room Next time Bud Tenny Box 545 Richardson TX 75080 CGS Hawk/Kruse Continued page 63 beneath smooth out wrinkles Three coats thinned nitrate dope top tissue trim should sufficient seal surfaces detailing including seat celluloid windscreens wheel pants struts rigging dummy engine can now added complete model make come alive Flying Balance plane shown plan adding lead shot and/or clay ballast box dont like test glide CO-2powered models because doesnt give much feel ship going perform under power Wait calm evening find softest grass surface can set motor low power setting give gas charge last filler cartridge Flick prop get motor started remember its apusher aim model spot about 50 ft front give gentle toss settles ground stalling diving crease gas charge no liquid yet please try again should show slight tendency climb gently turn right turns too tightly bend rudder just shade left try again power pattern seems safe increase motor speed bit watch climb right come back overhead full gas charge model being hand launched should get flights rang ing 45 sec updepending buoyant air isand quality CO-2 charge Hawk has enjoyable Free Flight Scale ships Ive built number years unique enough elicit both admiration questions spectatorsand competitive enough win Scale contest nation decide build have questions comments please write Larry Kruse Box 1137 Liberal KS 67901 Ill happy supply documentation infor mation cost CL Aerobatics/Fancher Continued page 64 able practical terms CG aft G/L center lift although technically stable rapidly becomes too sensitive RC Ts & Caps Super Quality.Super Price! TSHIRTS 50% cotloni5O% polyester complete range sizes RC hobbiest $595 Styte Ais yellnw hold black design Style B availahle navy white white navy CAPS tits Adjustable back mesh sides Only $595 SPECIAL COMBO OFFER Matching shirt cap set $995! shirt cap per set ORDER TODAY Send check money order US Please indicate size style cnlor Include $2 postage handling per item Florida residents add 5% sales tax Allew 4-6 weeks delivery IS YOUR CLUB LOOKING FOR FUNDRAISER ASK ABOUT OUR CLUB DISCOUNT PROGRAM RC NOVELTIES PO BOX 840205 PEMBROKE PINES FLORIDA 33084 TICK OFF TIMER Now Available 0-20 Seconds Fuel shut off Flood Off Auto rudder function Weight V oz Fuel line included EXTRA FUEL LINE TUmINGSO- ft DIRECT ORDER ON LV Send Cash Check MD COD $3 extra Calif 6% JOHN TATONE 62 BELHAVEN AVE DALY CITY CA 94015 Limited supply 148 Model Aviation faster Jim Clem coined appropriate phrasethe model becomes lead sled has push prop