Pccinut &I5~L0 Bill Hannan THE FULL-SIZE Turbo-Porter product Switzerland first flew during May 1961 An outgrowth piston-engined Pilatus Porter Turbo-Porter has produced several variations over years differing power plants minor details machines have employed number different countries thus large variety color/marking schemes may found choose may care undertake research offer following list references Flying April 1962 Aviation Week De cember 17 1962 AOPA Pilot De cember 1963 Aviation Week October 4 1963 Flugwelt Heft II 1965 AOPA Pilot October 1965 Flu gzeuge aus Aller Welt 1966 Aircraft World 1965 Model Airplane News August 1968Australian Modeler No7 model based upon early air craft used demonstrator Fair child Stratos Corporation colored overall white red embel lishments machine featured French Turbomeca Astozou engine Other types powered Canadian Pratt Whitney PT6 drawings also show alternative cowling shape model design dates back 1969 yet prototype still flying condi tion having participated successfully Van Nuys Taft San Diego Ca con tests well Las Vegas Nev During 1970 design voted Na tional Free Flight Societys 10 Models Year selecting subject Peanut factors enter Typically design fairly low aspect-ratio wing chosen since will present area within 13 maximum wing span per mitted rules standpoint Porter does fare too well having rather narrow chord Against ever offers very long nose moment easy-to-construct squarish outlines its best outside unlike Peanuts perform better indoors So much sales pitch Most should able scrape together enough material scrap box build little Swiss bird first Peanut may suggest exert effort keep light possible basic structure may either 1/16 sq 1/20 sq strip balsa See list suppliers end article Construction First gather together needed materials having everything close-at-hand will able progress quite rapidly rather having stop searching some missing item Cover full-size drawings clear plastic wrap protect glue choice Fuselage Construct two identical body sides working directly over plans important puncture strips straight pins could weaken structure new pin-down clamps work well may simply X straight pins over strip hold firmly building board sides have dried crack top bottom longerons permit angle inward shown top view reglue Bevel inner edges tail posts slightly glue together Add various small cross-pieces between sides working rear forward draftsmans triangle may used certain sides truly vertical work progresses certain joint sound necessary tiny fillet glue may text continued page 65 Turn page full-size plans Resting upon 1970 National Free Flight Society award certificate Pilatus Turbo Porter displays fine points normally found larger ships 13-in span required Peanut delightful bonus Peanut ability fly well out-doors speedily climbs good altitude long nose results turbine real ship aid balance October 1975 37 Peanut Pilatus Turbo continued page 39 added especially high-stress areas such around rear rubber peg sup ports landing gear mounting After cross-pieces place add bulkheads nose stringer little strument panel drawing may glued F-3 add bit dash Install two 1/32 hard sheet balsa sandwiches accept landing gear wires glue securely Carve nose block balsa cut rear member shape hard 3/32 sheet piece should snug fit fuselage nose will fall out flight Drill nose block accept either Peck-Polymers aluminum tubing thrust bearing Roughen up outside permit glue secure firmly nose block Landing Gear Bend landing gear legs shape 020 diameter music wire very light Peanut could made wood prefer sturdiness crash resistance wire spite weight penalty little juggling may required install upper legs lower legs should present no problem lower intersec tions wire struts may bound thread epoxy Note rearward struts actually attached fuselage free slide aft under load items originally omitted model interests simpli city later added Incidentally landing gear length shown approximates assumed airborne unloaded position real aircraft legs may built up scale thick ness detailed extent desired tailwheel simply formed extension tailwheel leg filled disc balsa painted main strut may round balsa main wheels balsa discs suitably rounded painted flat dark grey wheel discs best made paper glued position Wings Cut out eight 1/32 sheet balsa ribs six 1/16 1/20 sheet ribs Pin down 3/32 X 1/16 trailing edges cement ribs against di rectly over plan Note root ribs should angled slightly dihedral Next add 1/16 sq leading edges finally 3/32 X 1/32 hard balsa bass spars Tailplanes constructed 1/16 1/20 square strip balsa ex cept stab tips 1/8 X 1/16 Windshield Although fair approxima tion could made thin flat celluloid stretch-molded vacuum-formed canopy much effective balsa block carved sanded shape dicated forms mold have Mattel Vac-U-Form toy job will cinch Note units can often found low cost swap meets salvage stores Alternatively possible heat thin clear acetate mounted wooden picture frame over electric stove hot plate stretch mold canopy case mold mounted end dowel permit firm handhold Several attempts usually needed produce good can opy method worth effort Trim canopy shape add center strut can made painted scotch tape glue position fuselage Cover fuselage forward instru ment panel thin paper such ordi nary typing variety Better yet coated stock used glossy magazines Samp les usually available printer will take better finish typing paper careful though select thin stock quite weighty material side window areas also cut paper openings glazed cellophane use thick clear dope adhesive applied paper cellophone window strips placed inside window frames bit dope thinner flowed around edges pointed brush care method will provide smear-free junction Next windows/frames cemented fuselage sides Finally cover remainder fuselage tissue trim stripes cut colored tissue applied dope wings tailplanes also covered decorated lightweight tissue Panels should pinned jigs during shrinking doping operations resist warping Again pin-down type clamps may employed Only very thin plasticized clear dope should used Propeller prototype model has flown three different propel lers Originally three-blade unit fabricated epoxying three North Pa cific Skeeter blades together hub proved fairly efficient device tail ballast required offset its weight Later regular two bladed Skeeter prop fitted present model has 4 diameter Kaysun seems provide rapid climb Skeeter prop has molded-in free wheeling cam Kaysun prop used free-wheeler may added desired Some Peanuters feel glide better stopped propeller may wish experiment propeller shaft bent 040 diameter music wire sure add couple thrust washers reduce friction spinner optional will improve appearance Assembly Cut away covering parts attach glue can achieve firm wood-to-wood adhesion certain wings mounted WANTEO ideas happenings hints/kinks howto sketches photos news etc Send colum nist category concernedat address shown column photo idea printed Model Aviation will pay $5 contributor correct angle both seen side front may propped up suitable shims drying Next add 1/8 x 1/32 wing struts mounting tailplanes certain carefully aligned Install landing gear wheels secure tiny blobs cement epoxy Final Details remaining 10% can add much charm Peanut dont skip stage Port er abounds miscellaneous fittings such exhaust pipe air scoops lights tennas etc can simu lated balsa carvings should primered painted glued position Thin black tissue strips used outline various control surfaces Flying Check certain flying surfaces warped although little wash-out trailing edge tips higher leading edge tips wing panels desirable Other warps found may corrected over steaming teakettle Insert fairly short loop 2mm rub ber check see model bal ances near point shown plan prototype actually required small amount tail ballast unusual scale model Next find mythical field tall grass no wind try few test glides Most Peanuts glide very well least general appraisal flight characteristics may judged reasonable try few hand winds launch model note its flight path carefully model dives add bit weight tail end stalls may need some nose weight likely additional downthrust form thin shim between top noseblock front bulkhead may required model falls off wing add clay ballast opposite tip flight satis factory increase number turns try again OK replace motor longer lubed loop may bring about need slight rebalancing try using mechanical winder As power increased additional trimming may needed produce smooth pattern Turn circle under power can adjusted side-thrust shims indicated After become familiar model may gradually increase power until TurboPeanut will climb very steep angle high altitude glide smooth landing Average duration proto type has ranged 25-40 seconds de pending mainly upon quality available rubber good air thermal assistance model has occasionally exceeded minute Material Supply Sources 1/20 sq balsa strips Premier Company PO Box 8254 Long Beach Ca 90808 Superior Balsawood Supply Co Box 8082 Long Beach Ca 90808 Plastic propellers tis sue bass wood thrust bearings propeller shafts rubber Peck-Polymers P 0 Box 2498 La Mesa Ca 92041 Vintage Aero lthe Glen Tenafly NJ 07670 October1975 65
Edition: Model Aviation - 1975/10
Page Numbers: 37, 65
Pccinut &I5~L0 Bill Hannan THE FULL-SIZE Turbo-Porter product Switzerland first flew during May 1961 An outgrowth piston-engined Pilatus Porter Turbo-Porter has produced several variations over years differing power plants minor details machines have employed number different countries thus large variety color/marking schemes may found choose may care undertake research offer following list references Flying April 1962 Aviation Week De cember 17 1962 AOPA Pilot De cember 1963 Aviation Week October 4 1963 Flugwelt Heft II 1965 AOPA Pilot October 1965 Flu gzeuge aus Aller Welt 1966 Aircraft World 1965 Model Airplane News August 1968Australian Modeler No7 model based upon early air craft used demonstrator Fair child Stratos Corporation colored overall white red embel lishments machine featured French Turbomeca Astozou engine Other types powered Canadian Pratt Whitney PT6 drawings also show alternative cowling shape model design dates back 1969 yet prototype still flying condi tion having participated successfully Van Nuys Taft San Diego Ca con tests well Las Vegas Nev During 1970 design voted Na tional Free Flight Societys 10 Models Year selecting subject Peanut factors enter Typically design fairly low aspect-ratio wing chosen since will present area within 13 maximum wing span per mitted rules standpoint Porter does fare too well having rather narrow chord Against ever offers very long nose moment easy-to-construct squarish outlines its best outside unlike Peanuts perform better indoors So much sales pitch Most should able scrape together enough material scrap box build little Swiss bird first Peanut may suggest exert effort keep light possible basic structure may either 1/16 sq 1/20 sq strip balsa See list suppliers end article Construction First gather together needed materials having everything close-at-hand will able progress quite rapidly rather having stop searching some missing item Cover full-size drawings clear plastic wrap protect glue choice Fuselage Construct two identical body sides working directly over plans important puncture strips straight pins could weaken structure new pin-down clamps work well may simply X straight pins over strip hold firmly building board sides have dried crack top bottom longerons permit angle inward shown top view reglue Bevel inner edges tail posts slightly glue together Add various small cross-pieces between sides working rear forward draftsmans triangle may used certain sides truly vertical work progresses certain joint sound necessary tiny fillet glue may text continued page 65 Turn page full-size plans Resting upon 1970 National Free Flight Society award certificate Pilatus Turbo Porter displays fine points normally found larger ships 13-in span required Peanut delightful bonus Peanut ability fly well out-doors speedily climbs good altitude long nose results turbine real ship aid balance October 1975 37 Peanut Pilatus Turbo continued page 39 added especially high-stress areas such around rear rubber peg sup ports landing gear mounting After cross-pieces place add bulkheads nose stringer little strument panel drawing may glued F-3 add bit dash Install two 1/32 hard sheet balsa sandwiches accept landing gear wires glue securely Carve nose block balsa cut rear member shape hard 3/32 sheet piece should snug fit fuselage nose will fall out flight Drill nose block accept either Peck-Polymers aluminum tubing thrust bearing Roughen up outside permit glue secure firmly nose block Landing Gear Bend landing gear legs shape 020 diameter music wire very light Peanut could made wood prefer sturdiness crash resistance wire spite weight penalty little juggling may required install upper legs lower legs should present no problem lower intersec tions wire struts may bound thread epoxy Note rearward struts actually attached fuselage free slide aft under load items originally omitted model interests simpli city later added Incidentally landing gear length shown approximates assumed airborne unloaded position real aircraft legs may built up scale thick ness detailed extent desired tailwheel simply formed extension tailwheel leg filled disc balsa painted main strut may round balsa main wheels balsa discs suitably rounded painted flat dark grey wheel discs best made paper glued position Wings Cut out eight 1/32 sheet balsa ribs six 1/16 1/20 sheet ribs Pin down 3/32 X 1/16 trailing edges cement ribs against di rectly over plan Note root ribs should angled slightly dihedral Next add 1/16 sq leading edges finally 3/32 X 1/32 hard balsa bass spars Tailplanes constructed 1/16 1/20 square strip balsa ex cept stab tips 1/8 X 1/16 Windshield Although fair approxima tion could made thin flat celluloid stretch-molded vacuum-formed canopy much effective balsa block carved sanded shape dicated forms mold have Mattel Vac-U-Form toy job will cinch Note units can often found low cost swap meets salvage stores Alternatively possible heat thin clear acetate mounted wooden picture frame over electric stove hot plate stretch mold canopy case mold mounted end dowel permit firm handhold Several attempts usually needed produce good can opy method worth effort Trim canopy shape add center strut can made painted scotch tape glue position fuselage Cover fuselage forward instru ment panel thin paper such ordi nary typing variety Better yet coated stock used glossy magazines Samp les usually available printer will take better finish typing paper careful though select thin stock quite weighty material side window areas also cut paper openings glazed cellophane use thick clear dope adhesive applied paper cellophone window strips placed inside window frames bit dope thinner flowed around edges pointed brush care method will provide smear-free junction Next windows/frames cemented fuselage sides Finally cover remainder fuselage tissue trim stripes cut colored tissue applied dope wings tailplanes also covered decorated lightweight tissue Panels should pinned jigs during shrinking doping operations resist warping Again pin-down type clamps may employed Only very thin plasticized clear dope should used Propeller prototype model has flown three different propel lers Originally three-blade unit fabricated epoxying three North Pa cific Skeeter blades together hub proved fairly efficient device tail ballast required offset its weight Later regular two bladed Skeeter prop fitted present model has 4 diameter Kaysun seems provide rapid climb Skeeter prop has molded-in free wheeling cam Kaysun prop used free-wheeler may added desired Some Peanuters feel glide better stopped propeller may wish experiment propeller shaft bent 040 diameter music wire sure add couple thrust washers reduce friction spinner optional will improve appearance Assembly Cut away covering parts attach glue can achieve firm wood-to-wood adhesion certain wings mounted WANTEO ideas happenings hints/kinks howto sketches photos news etc Send colum nist category concernedat address shown column photo idea printed Model Aviation will pay $5 contributor correct angle both seen side front may propped up suitable shims drying Next add 1/8 x 1/32 wing struts mounting tailplanes certain carefully aligned Install landing gear wheels secure tiny blobs cement epoxy Final Details remaining 10% can add much charm Peanut dont skip stage Port er abounds miscellaneous fittings such exhaust pipe air scoops lights tennas etc can simu lated balsa carvings should primered painted glued position Thin black tissue strips used outline various control surfaces Flying Check certain flying surfaces warped although little wash-out trailing edge tips higher leading edge tips wing panels desirable Other warps found may corrected over steaming teakettle Insert fairly short loop 2mm rub ber check see model bal ances near point shown plan prototype actually required small amount tail ballast unusual scale model Next find mythical field tall grass no wind try few test glides Most Peanuts glide very well least general appraisal flight characteristics may judged reasonable try few hand winds launch model note its flight path carefully model dives add bit weight tail end stalls may need some nose weight likely additional downthrust form thin shim between top noseblock front bulkhead may required model falls off wing add clay ballast opposite tip flight satis factory increase number turns try again OK replace motor longer lubed loop may bring about need slight rebalancing try using mechanical winder As power increased additional trimming may needed produce smooth pattern Turn circle under power can adjusted side-thrust shims indicated After become familiar model may gradually increase power until TurboPeanut will climb very steep angle high altitude glide smooth landing Average duration proto type has ranged 25-40 seconds de pending mainly upon quality available rubber good air thermal assistance model has occasionally exceeded minute Material Supply Sources 1/20 sq balsa strips Premier Company PO Box 8254 Long Beach Ca 90808 Superior Balsawood Supply Co Box 8082 Long Beach Ca 90808 Plastic propellers tis sue bass wood thrust bearings propeller shafts rubber Peck-Polymers P 0 Box 2498 La Mesa Ca 92041 Vintage Aero lthe Glen Tenafly NJ 07670 October1975 65