LAST MONTH introduced rather progressive concept control-line trainers result experience PHA Special its Primary guise should now able make some very nice smooth flights fact very likely feel about ready move excit ing flying Ordinarily would mean building entirely new ship PBA Special Its ready move So wash oil grime using good household cleaner such Fantastic trusty PHA clear off space workbench going show fly upside down airplane silly tIIZ4QDO SDCCkL Below The designers daughter displays both Basic Trainer left Advanced Train ercompare its adjacent 3-view Primary Trainer 3-view included last months installment about ship 34 Model Aviation Poised action background de signer aignalling son release Ad vanced Trainer Interesting headset boy wearing protect hearingmaybe youve noticed some engines leave tin gling sensation ears BASIC TRAINER pic deserves study Numerous design points structural features shown clearly Most significant wing saddle al lows updating ship progressive use three types wings first sheet plan provided entire Primary machine second sheet portrays additional com ponents required upgrade Primary trainer its subsequent Basic Ad vanced modes Basic wing begun cutting out necessary ribs plan laid upon absolutely flat surface pro tected against unwelcome intrusions glue sheet clear plastic food wrap Assembly wing slightly dif ferent previous wing construction based upon main spar trailing edge spar ribs glued two spars will leave front ribs sticking up air fol lowing two spars leading edge added After assembly solid may removed board remaining spar gussets added extra strength nice touch add soft 1 / 16 sheet balsa webs grain running ver tical between upper lower main spars After installing securely wing tip weight assembly may sanded smooth covered plywood tip-plates added whole doped Stop-action shot catches Advanced Trainer high lines up flaps down eleva tor AT version has full stunt capability Last month Primary Trainer version presented Now ready exciting flying PBA can modified Basic training finally Advanced training building new airplane improve responsiveness new larger elevator fitted option course whether use old stabilizer make new assembling Basic trainer necessary following 1 Install new stabilizer/elevator sembly connect pushrod 2 Remove fuel tank landing gear 3 Reinstall landing gear rear set mounting holes moving CG back thus will enhance ships re sponse controls additionally landings will less bouncy 4 Install new larger fuel tank 5 Secure new wing place Back aerodrome will quickly find revamped trainer flies very much did its earlier form except seems indeed respon sive control inputs suggest fly newly configured trainer level couple tanks full order get feel length time engine will run course shallow climbs dives during flights will also ac quaint better controls Re member controls will less jumpy Above Basic Trainer flies past bane fit photographer dont have make new wing Advanced Trainer unless wish Changes Basic Trainer wing involved removal tip plates addition builtup tips Advanced Trainer wing flaps coupled elevator keep arm stiff fly wrist easiest basic maneuvers wingover Remem ber gentle climbs dives men tioned earlier Simply series climbs making climb bit steeper its predecessor until find PRA Special describing right angle pull-up climbing straight over top flying circle down verti cal dive similar sharp pull-up will re store diving model level flight wingover point keep mind anytime starting fly note direc tion breeze want take off downwind anyway plan maneu vers model doing its maneu vers down-wind side flying circle say pilots back should towards wind breeze will help keep flying lines taut insure good control new pilot anxious loop ship its easy looks back wind arm still feed enough up nose ship up big curve As plane becomes vertical give additional up elevator creasing elevator deflection model comes around As nose comes up horizontal time level off Now frankly loop done manner may look very round probably will recover level flight good bit higher started loop safe way start practice confidence loops will become nice round After youve got loops looking pretty good youll ready go onto something bit different Pull up loop have doing time model reaches top loop neutralize controls Wow youre flying upside down Quickly pulling up~ model will finish loop Using technique extending loop can fly upside down lohg like 0112 LEADING EDGE H ADVANCED WING II I/A CENTER RIBADVANCED GYARILIZER I/B BALGG s HINGED AS FOR PRIMARY MODEL ADVANCED ELEVATOR KIT NYLON HINGE ___I CONNECTORI I/B FLAPDII/16WIRE NYLON FLAP HORN I/IAPLY FLAP REINFORCEMENT- LI I/BALGM TUBE BEARING LARGER FUEL TANK 72 GD CLARY OTUNT OPTIONAL GPINNER 0 00 WING PIECED OF FUEL LINE REVELED THGS WILL REDGCE DIPHONING MOVE LANDING GEAR TO REAR HOLED _IIjoI II II II I I FLAP POOH ROD GOLDERED C VIADJIJGTABLE CLEVID WI IRI 3ffi I/B WING TIP BIRD NOTE THID ID THE DECOND DHEET OF TWO PART PREDENT THE FIRDT DHEET PORTRAYG THE ENTIRE PRIMARY TRAINEE WHILE THIG GREET GHOWD ONLY THOGE MODIFICATIONS NEEDED TO UPGRADE THE PRIMARY TRAINER TO THE MORE CAPABLE BASIC TRAINER AND ADVANCED TRAINER CONFI FULL-SIZE PLANS AVAILABLESEE PAGE 96 NOTE THE PRIMARY WING PLAN PLAN SHEET ID USED IN CONDYF DURDEGUENT WINGS WHICH WILL THE CHANGED DHOWN HERE NOTEUNLEGD OTHERWIDE NOTED ID BALDA WIRE IG MUSIC Leadout guide detail AT version tip employs sheet balsa rib centerline fan-like rib pieces both top bottom sheet LINE GUIDE I/B GA KET LINE GUIDE DUPPORT WING TIP Il\ I I I/DRALSA CANOPY PSA SPEC/AL MULTI-PURPOGE CL TRAINER TRIO POSE SHOWS BASIC AND ADVANCED MODIFICATIONS DESIGNED Br FRANK SCOTT I IS IBASIC STABILIZER II/p BALSA I/AG 1/4 SPRUCE REINFORCEMENT II 0114 St 3/DDHOLED Fl---ELEVATOR HORN HINGEG AS FOR PRIMARY MODEL r I/IA PLY REINFORCEMENT II IRADIC ELEVATOR I _____ 36 Model Aviation Note inverted controls will seem reversed ie up elevator will cause ship pitch downwards vice-versa curiously fliers find easier fly inverted phase flight controlling hand laid over side ways palm up attempt turn handle over hand order fly upside down will likely result confused situation crash Also worry excessively about flying lines becoming twisted during loops wires can withstand quite few twists before controls start stiffen control lines may easily untwisted once model ground fact once have learned technique out side looping can easily keep lines straight flight doing oustide loops inside loops PBA Special its Basic configu ration will indeed perform basic ma neuvers encountered control-line flying possible remarkable 101 I I I I L.1/R5 1/4 SPRUCE IREINFORCEMENT I 3/32 DIA HOLES 4 NYLON ELEVATOR HORN 1/IAPLY REINFORCEMENT_____ PATCH WRAPPED FLAP i/A RIB II 00 l/16PLY BASIC TIP-PLATE 2 TIPPLATE LEADING EDGE 1 TIP DETAIL FOR BASIC WINS I/R GUSSET trainer few hours workbench Basic trainer can brought Advanced configuration per form considerably finesse Once again disassemble model wash accumulated oil grime Again stabilizer elevator assembly modified per plan reinstalled ship fuselage has balsa plas tic canopy added appearances sake wing undergoes essen tial modifications just may deem desirable build new wing rather revamp old Should wish pro ceed old however begin care fully removing plywood tip plates rounded wing tip structure built upon tip rib line guide added new tips covered doped Wing flaps cut sheet balsa sanded shape two flaps joined gether connector formed music wire epoxied place Note aluminum tube bearing placed connector Overlaying cloth patches will strengthen joints types hinges used flaps optional chose molded nylon hinges inserted slots out wings spruce trailing edge flap secured epoxy pins although traditional fabric hinge will entirely satisfactory flaps should finished model pictured flaps silked doped match wing control horn installed As before PRA Special assembled bolting horizontal tail surfaces place securing wing rubber bands hooking up controls though something new added must provide activation flaps short pushrod must fabricated continued page 94 Below Leadout guide Baeic Treiner provided drilling holes through plywood wing tip Plane opposite page concern changes made Primary Trainer basic plan presented last month see Plan Service page Observe CG position March1977 37 Above The wing-tip weight outboard can glued place piece hinge cloth mate rial prevent being jarred loose Article cludes stunt flying instructions Tail surfaces Advanced Trainer Note spruce reenforcement strips allow horizontal surfaces bolt place AT tail can easily substituted tail used Basic Trainer ENGINE CYLINDER HEADQUARTERS SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take hard work out radial engined models highly de f tailed cylinders precision molded high-impact styrene fea ture deep cooling fins SIZES Whirlwind 1 1 1/2PP 2 scales Le Rhone 1 1 1/2/P 2 scales Wasp 1 1 1/2P 2 scales LE RHONE Universal ales ALSO AVAILABLE MACHINE GUN KITS NERS E WHEELS TS 0 CANOPIES 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 PBA Special/Scott continued page 37 used connect innermost hole bellcrank outer hole flap horn elevators pushrod connects outer bellcrank hole elevator horn hole used should such travel elevator about three times opposition travel flaps Thus applying 450 UP elevator should result flaps being depressed about 150 use adjustable RC-type clevis fitting pushrods will greatly simplify setting up flaps Performance PBA Special will also enhanced fitting smaller wheels though done expense ground handling another lesson aeronautics practically design feature Aviation compro mise now again ready return aerodrome time Ad vanced trainer Advanced trainer will fly much Basic configuration did However larger wing wing flaps will allow model fly rather smoothly through maneuvers AMA Rule Book Precision Aerobatics can very demanding maneuvers accomplished contest stunt ships nothing combinations taught PBA Special take offs level flight loops wingovers inverted flight landing Thus under standing may proceed confidence area Control-line flying Happy landings lots ofem CL Navy Carrier/Perry continued page 47 standard Profile Carrier fuel tank mount ing unless tank partially full half-full tank however increases dis tance between fuel spray bar take off fuel goes back tank desired effect can obtained using uniflow tank uniflow tank has vent tube same mixture air ground fuel level should spray bar under both conditions FIGURE 2 FUEL TANK FOR PROFILE CARRIER EVEN WITI4 SPRAY BA 9 / / // K / -J Ii ii S FRONT fuel level engine sees point vent tube terminates within tank long vent im mersed fuel standard uniflow tank has vent tube near fuel pick-up point optimum Carrier cause causes greater apparent dis tance between fuel carburetor during acceleration apparent fuel level often outboard carburetor high speed tank use shown Fig 2 can adapted commercial squarewedge fuel tank must leak-proof fuel vent should near front tank spray bar look ing directly nose fill tank through vent airplane its nose separate vent tube use fill ing could added must plugged during flight having trouble engine runs being inconsistent using stock carburetor want increase engine output little expenditure time money give ideas try Richard L Perry 5016 Angelita Ave Dayton OH 45424 TOP VENT SIDE 94 Model Aviation 25t FOR COMPLETE CATALOG Dept MA 4 UNIVERSAL IS OUTSIDEFIGURE CIRCLE AT R[ST ACCEL FORCE IN FLIGHT - CK UP ENGINES COX/SANWA RIG SYSTEMS AIRTRONICS KITS Send complete catalog 1525 EWarner Ave Santa Ana CA 92702 HOBBIES -- --II -- .0 . . .- 0 %
Edition: Model Aviation - 1977/03
Page Numbers: 34, 35, 36, 37, 94
LAST MONTH introduced rather progressive concept control-line trainers result experience PHA Special its Primary guise should now able make some very nice smooth flights fact very likely feel about ready move excit ing flying Ordinarily would mean building entirely new ship PBA Special Its ready move So wash oil grime using good household cleaner such Fantastic trusty PHA clear off space workbench going show fly upside down airplane silly tIIZ4QDO SDCCkL Below The designers daughter displays both Basic Trainer left Advanced Train ercompare its adjacent 3-view Primary Trainer 3-view included last months installment about ship 34 Model Aviation Poised action background de signer aignalling son release Ad vanced Trainer Interesting headset boy wearing protect hearingmaybe youve noticed some engines leave tin gling sensation ears BASIC TRAINER pic deserves study Numerous design points structural features shown clearly Most significant wing saddle al lows updating ship progressive use three types wings first sheet plan provided entire Primary machine second sheet portrays additional com ponents required upgrade Primary trainer its subsequent Basic Ad vanced modes Basic wing begun cutting out necessary ribs plan laid upon absolutely flat surface pro tected against unwelcome intrusions glue sheet clear plastic food wrap Assembly wing slightly dif ferent previous wing construction based upon main spar trailing edge spar ribs glued two spars will leave front ribs sticking up air fol lowing two spars leading edge added After assembly solid may removed board remaining spar gussets added extra strength nice touch add soft 1 / 16 sheet balsa webs grain running ver tical between upper lower main spars After installing securely wing tip weight assembly may sanded smooth covered plywood tip-plates added whole doped Stop-action shot catches Advanced Trainer high lines up flaps down eleva tor AT version has full stunt capability Last month Primary Trainer version presented Now ready exciting flying PBA can modified Basic training finally Advanced training building new airplane improve responsiveness new larger elevator fitted option course whether use old stabilizer make new assembling Basic trainer necessary following 1 Install new stabilizer/elevator sembly connect pushrod 2 Remove fuel tank landing gear 3 Reinstall landing gear rear set mounting holes moving CG back thus will enhance ships re sponse controls additionally landings will less bouncy 4 Install new larger fuel tank 5 Secure new wing place Back aerodrome will quickly find revamped trainer flies very much did its earlier form except seems indeed respon sive control inputs suggest fly newly configured trainer level couple tanks full order get feel length time engine will run course shallow climbs dives during flights will also ac quaint better controls Re member controls will less jumpy Above Basic Trainer flies past bane fit photographer dont have make new wing Advanced Trainer unless wish Changes Basic Trainer wing involved removal tip plates addition builtup tips Advanced Trainer wing flaps coupled elevator keep arm stiff fly wrist easiest basic maneuvers wingover Remem ber gentle climbs dives men tioned earlier Simply series climbs making climb bit steeper its predecessor until find PRA Special describing right angle pull-up climbing straight over top flying circle down verti cal dive similar sharp pull-up will re store diving model level flight wingover point keep mind anytime starting fly note direc tion breeze want take off downwind anyway plan maneu vers model doing its maneu vers down-wind side flying circle say pilots back should towards wind breeze will help keep flying lines taut insure good control new pilot anxious loop ship its easy looks back wind arm still feed enough up nose ship up big curve As plane becomes vertical give additional up elevator creasing elevator deflection model comes around As nose comes up horizontal time level off Now frankly loop done manner may look very round probably will recover level flight good bit higher started loop safe way start practice confidence loops will become nice round After youve got loops looking pretty good youll ready go onto something bit different Pull up loop have doing time model reaches top loop neutralize controls Wow youre flying upside down Quickly pulling up~ model will finish loop Using technique extending loop can fly upside down lohg like 0112 LEADING EDGE H ADVANCED WING II I/A CENTER RIBADVANCED GYARILIZER I/B BALGG s HINGED AS FOR PRIMARY MODEL ADVANCED ELEVATOR KIT NYLON HINGE ___I CONNECTORI I/B FLAPDII/16WIRE NYLON FLAP HORN I/IAPLY FLAP REINFORCEMENT- LI I/BALGM TUBE BEARING LARGER FUEL TANK 72 GD CLARY OTUNT OPTIONAL GPINNER 0 00 WING PIECED OF FUEL LINE REVELED THGS WILL REDGCE DIPHONING MOVE LANDING GEAR TO REAR HOLED _IIjoI II II II I I FLAP POOH ROD GOLDERED C VIADJIJGTABLE CLEVID WI IRI 3ffi I/B WING TIP BIRD NOTE THID ID THE DECOND DHEET OF TWO PART PREDENT THE FIRDT DHEET PORTRAYG THE ENTIRE PRIMARY TRAINEE WHILE THIG GREET GHOWD ONLY THOGE MODIFICATIONS NEEDED TO UPGRADE THE PRIMARY TRAINER TO THE MORE CAPABLE BASIC TRAINER AND ADVANCED TRAINER CONFI FULL-SIZE PLANS AVAILABLESEE PAGE 96 NOTE THE PRIMARY WING PLAN PLAN SHEET ID USED IN CONDYF DURDEGUENT WINGS WHICH WILL THE CHANGED DHOWN HERE NOTEUNLEGD OTHERWIDE NOTED ID BALDA WIRE IG MUSIC Leadout guide detail AT version tip employs sheet balsa rib centerline fan-like rib pieces both top bottom sheet LINE GUIDE I/B GA KET LINE GUIDE DUPPORT WING TIP Il\ I I I/DRALSA CANOPY PSA SPEC/AL MULTI-PURPOGE CL TRAINER TRIO POSE SHOWS BASIC AND ADVANCED MODIFICATIONS DESIGNED Br FRANK SCOTT I IS IBASIC STABILIZER II/p BALSA I/AG 1/4 SPRUCE REINFORCEMENT II 0114 St 3/DDHOLED Fl---ELEVATOR HORN HINGEG AS FOR PRIMARY MODEL r I/IA PLY REINFORCEMENT II IRADIC ELEVATOR I _____ 36 Model Aviation Note inverted controls will seem reversed ie up elevator will cause ship pitch downwards vice-versa curiously fliers find easier fly inverted phase flight controlling hand laid over side ways palm up attempt turn handle over hand order fly upside down will likely result confused situation crash Also worry excessively about flying lines becoming twisted during loops wires can withstand quite few twists before controls start stiffen control lines may easily untwisted once model ground fact once have learned technique out side looping can easily keep lines straight flight doing oustide loops inside loops PBA Special its Basic configu ration will indeed perform basic ma neuvers encountered control-line flying possible remarkable 101 I I I I L.1/R5 1/4 SPRUCE IREINFORCEMENT I 3/32 DIA HOLES 4 NYLON ELEVATOR HORN 1/IAPLY REINFORCEMENT_____ PATCH WRAPPED FLAP i/A RIB II 00 l/16PLY BASIC TIP-PLATE 2 TIPPLATE LEADING EDGE 1 TIP DETAIL FOR BASIC WINS I/R GUSSET trainer few hours workbench Basic trainer can brought Advanced configuration per form considerably finesse Once again disassemble model wash accumulated oil grime Again stabilizer elevator assembly modified per plan reinstalled ship fuselage has balsa plas tic canopy added appearances sake wing undergoes essen tial modifications just may deem desirable build new wing rather revamp old Should wish pro ceed old however begin care fully removing plywood tip plates rounded wing tip structure built upon tip rib line guide added new tips covered doped Wing flaps cut sheet balsa sanded shape two flaps joined gether connector formed music wire epoxied place Note aluminum tube bearing placed connector Overlaying cloth patches will strengthen joints types hinges used flaps optional chose molded nylon hinges inserted slots out wings spruce trailing edge flap secured epoxy pins although traditional fabric hinge will entirely satisfactory flaps should finished model pictured flaps silked doped match wing control horn installed As before PRA Special assembled bolting horizontal tail surfaces place securing wing rubber bands hooking up controls though something new added must provide activation flaps short pushrod must fabricated continued page 94 Below Leadout guide Baeic Treiner provided drilling holes through plywood wing tip Plane opposite page concern changes made Primary Trainer basic plan presented last month see Plan Service page Observe CG position March1977 37 Above The wing-tip weight outboard can glued place piece hinge cloth mate rial prevent being jarred loose Article cludes stunt flying instructions Tail surfaces Advanced Trainer Note spruce reenforcement strips allow horizontal surfaces bolt place AT tail can easily substituted tail used Basic Trainer ENGINE CYLINDER HEADQUARTERS SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take hard work out radial engined models highly de f tailed cylinders precision molded high-impact styrene fea ture deep cooling fins SIZES Whirlwind 1 1 1/2PP 2 scales Le Rhone 1 1 1/2/P 2 scales Wasp 1 1 1/2P 2 scales LE RHONE Universal ales ALSO AVAILABLE MACHINE GUN KITS NERS E WHEELS TS 0 CANOPIES 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 PBA Special/Scott continued page 37 used connect innermost hole bellcrank outer hole flap horn elevators pushrod connects outer bellcrank hole elevator horn hole used should such travel elevator about three times opposition travel flaps Thus applying 450 UP elevator should result flaps being depressed about 150 use adjustable RC-type clevis fitting pushrods will greatly simplify setting up flaps Performance PBA Special will also enhanced fitting smaller wheels though done expense ground handling another lesson aeronautics practically design feature Aviation compro mise now again ready return aerodrome time Ad vanced trainer Advanced trainer will fly much Basic configuration did However larger wing wing flaps will allow model fly rather smoothly through maneuvers AMA Rule Book Precision Aerobatics can very demanding maneuvers accomplished contest stunt ships nothing combinations taught PBA Special take offs level flight loops wingovers inverted flight landing Thus under standing may proceed confidence area Control-line flying Happy landings lots ofem CL Navy Carrier/Perry continued page 47 standard Profile Carrier fuel tank mount ing unless tank partially full half-full tank however increases dis tance between fuel spray bar take off fuel goes back tank desired effect can obtained using uniflow tank uniflow tank has vent tube same mixture air ground fuel level should spray bar under both conditions FIGURE 2 FUEL TANK FOR PROFILE CARRIER EVEN WITI4 SPRAY BA 9 / / // K / -J Ii ii S FRONT fuel level engine sees point vent tube terminates within tank long vent im mersed fuel standard uniflow tank has vent tube near fuel pick-up point optimum Carrier cause causes greater apparent dis tance between fuel carburetor during acceleration apparent fuel level often outboard carburetor high speed tank use shown Fig 2 can adapted commercial squarewedge fuel tank must leak-proof fuel vent should near front tank spray bar look ing directly nose fill tank through vent airplane its nose separate vent tube use fill ing could added must plugged during flight having trouble engine runs being inconsistent using stock carburetor want increase engine output little expenditure time money give ideas try Richard L Perry 5016 Angelita Ave Dayton OH 45424 TOP VENT SIDE 94 Model Aviation 25t FOR COMPLETE CATALOG Dept MA 4 UNIVERSAL IS OUTSIDEFIGURE CIRCLE AT R[ST ACCEL FORCE IN FLIGHT - CK UP ENGINES COX/SANWA RIG SYSTEMS AIRTRONICS KITS Send complete catalog 1525 EWarner Ave Santa Ana CA 92702 HOBBIES -- --II -- .0 . . .- 0 %
Edition: Model Aviation - 1977/03
Page Numbers: 34, 35, 36, 37, 94
LAST MONTH introduced rather progressive concept control-line trainers result experience PHA Special its Primary guise should now able make some very nice smooth flights fact very likely feel about ready move excit ing flying Ordinarily would mean building entirely new ship PBA Special Its ready move So wash oil grime using good household cleaner such Fantastic trusty PHA clear off space workbench going show fly upside down airplane silly tIIZ4QDO SDCCkL Below The designers daughter displays both Basic Trainer left Advanced Train ercompare its adjacent 3-view Primary Trainer 3-view included last months installment about ship 34 Model Aviation Poised action background de signer aignalling son release Ad vanced Trainer Interesting headset boy wearing protect hearingmaybe youve noticed some engines leave tin gling sensation ears BASIC TRAINER pic deserves study Numerous design points structural features shown clearly Most significant wing saddle al lows updating ship progressive use three types wings first sheet plan provided entire Primary machine second sheet portrays additional com ponents required upgrade Primary trainer its subsequent Basic Ad vanced modes Basic wing begun cutting out necessary ribs plan laid upon absolutely flat surface pro tected against unwelcome intrusions glue sheet clear plastic food wrap Assembly wing slightly dif ferent previous wing construction based upon main spar trailing edge spar ribs glued two spars will leave front ribs sticking up air fol lowing two spars leading edge added After assembly solid may removed board remaining spar gussets added extra strength nice touch add soft 1 / 16 sheet balsa webs grain running ver tical between upper lower main spars After installing securely wing tip weight assembly may sanded smooth covered plywood tip-plates added whole doped Stop-action shot catches Advanced Trainer high lines up flaps down eleva tor AT version has full stunt capability Last month Primary Trainer version presented Now ready exciting flying PBA can modified Basic training finally Advanced training building new airplane improve responsiveness new larger elevator fitted option course whether use old stabilizer make new assembling Basic trainer necessary following 1 Install new stabilizer/elevator sembly connect pushrod 2 Remove fuel tank landing gear 3 Reinstall landing gear rear set mounting holes moving CG back thus will enhance ships re sponse controls additionally landings will less bouncy 4 Install new larger fuel tank 5 Secure new wing place Back aerodrome will quickly find revamped trainer flies very much did its earlier form except seems indeed respon sive control inputs suggest fly newly configured trainer level couple tanks full order get feel length time engine will run course shallow climbs dives during flights will also ac quaint better controls Re member controls will less jumpy Above Basic Trainer flies past bane fit photographer dont have make new wing Advanced Trainer unless wish Changes Basic Trainer wing involved removal tip plates addition builtup tips Advanced Trainer wing flaps coupled elevator keep arm stiff fly wrist easiest basic maneuvers wingover Remem ber gentle climbs dives men tioned earlier Simply series climbs making climb bit steeper its predecessor until find PRA Special describing right angle pull-up climbing straight over top flying circle down verti cal dive similar sharp pull-up will re store diving model level flight wingover point keep mind anytime starting fly note direc tion breeze want take off downwind anyway plan maneu vers model doing its maneu vers down-wind side flying circle say pilots back should towards wind breeze will help keep flying lines taut insure good control new pilot anxious loop ship its easy looks back wind arm still feed enough up nose ship up big curve As plane becomes vertical give additional up elevator creasing elevator deflection model comes around As nose comes up horizontal time level off Now frankly loop done manner may look very round probably will recover level flight good bit higher started loop safe way start practice confidence loops will become nice round After youve got loops looking pretty good youll ready go onto something bit different Pull up loop have doing time model reaches top loop neutralize controls Wow youre flying upside down Quickly pulling up~ model will finish loop Using technique extending loop can fly upside down lohg like 0112 LEADING EDGE H ADVANCED WING II I/A CENTER RIBADVANCED GYARILIZER I/B BALGG s HINGED AS FOR PRIMARY MODEL ADVANCED ELEVATOR KIT NYLON HINGE ___I CONNECTORI I/B FLAPDII/16WIRE NYLON FLAP HORN I/IAPLY FLAP REINFORCEMENT- LI I/BALGM TUBE BEARING LARGER FUEL TANK 72 GD CLARY OTUNT OPTIONAL GPINNER 0 00 WING PIECED OF FUEL LINE REVELED THGS WILL REDGCE DIPHONING MOVE LANDING GEAR TO REAR HOLED _IIjoI II II II I I FLAP POOH ROD GOLDERED C VIADJIJGTABLE CLEVID WI IRI 3ffi I/B WING TIP BIRD NOTE THID ID THE DECOND DHEET OF TWO PART PREDENT THE FIRDT DHEET PORTRAYG THE ENTIRE PRIMARY TRAINEE WHILE THIG GREET GHOWD ONLY THOGE MODIFICATIONS NEEDED TO UPGRADE THE PRIMARY TRAINER TO THE MORE CAPABLE BASIC TRAINER AND ADVANCED TRAINER CONFI FULL-SIZE PLANS AVAILABLESEE PAGE 96 NOTE THE PRIMARY WING PLAN PLAN SHEET ID USED IN CONDYF DURDEGUENT WINGS WHICH WILL THE CHANGED DHOWN HERE NOTEUNLEGD OTHERWIDE NOTED ID BALDA WIRE IG MUSIC Leadout guide detail AT version tip employs sheet balsa rib centerline fan-like rib pieces both top bottom sheet LINE GUIDE I/B GA KET LINE GUIDE DUPPORT WING TIP Il\ I I I/DRALSA CANOPY PSA SPEC/AL MULTI-PURPOGE CL TRAINER TRIO POSE SHOWS BASIC AND ADVANCED MODIFICATIONS DESIGNED Br FRANK SCOTT I IS IBASIC STABILIZER II/p BALSA I/AG 1/4 SPRUCE REINFORCEMENT II 0114 St 3/DDHOLED Fl---ELEVATOR HORN HINGEG AS FOR PRIMARY MODEL r I/IA PLY REINFORCEMENT II IRADIC ELEVATOR I _____ 36 Model Aviation Note inverted controls will seem reversed ie up elevator will cause ship pitch downwards vice-versa curiously fliers find easier fly inverted phase flight controlling hand laid over side ways palm up attempt turn handle over hand order fly upside down will likely result confused situation crash Also worry excessively about flying lines becoming twisted during loops wires can withstand quite few twists before controls start stiffen control lines may easily untwisted once model ground fact once have learned technique out side looping can easily keep lines straight flight doing oustide loops inside loops PBA Special its Basic configu ration will indeed perform basic ma neuvers encountered control-line flying possible remarkable 101 I I I I L.1/R5 1/4 SPRUCE IREINFORCEMENT I 3/32 DIA HOLES 4 NYLON ELEVATOR HORN 1/IAPLY REINFORCEMENT_____ PATCH WRAPPED FLAP i/A RIB II 00 l/16PLY BASIC TIP-PLATE 2 TIPPLATE LEADING EDGE 1 TIP DETAIL FOR BASIC WINS I/R GUSSET trainer few hours workbench Basic trainer can brought Advanced configuration per form considerably finesse Once again disassemble model wash accumulated oil grime Again stabilizer elevator assembly modified per plan reinstalled ship fuselage has balsa plas tic canopy added appearances sake wing undergoes essen tial modifications just may deem desirable build new wing rather revamp old Should wish pro ceed old however begin care fully removing plywood tip plates rounded wing tip structure built upon tip rib line guide added new tips covered doped Wing flaps cut sheet balsa sanded shape two flaps joined gether connector formed music wire epoxied place Note aluminum tube bearing placed connector Overlaying cloth patches will strengthen joints types hinges used flaps optional chose molded nylon hinges inserted slots out wings spruce trailing edge flap secured epoxy pins although traditional fabric hinge will entirely satisfactory flaps should finished model pictured flaps silked doped match wing control horn installed As before PRA Special assembled bolting horizontal tail surfaces place securing wing rubber bands hooking up controls though something new added must provide activation flaps short pushrod must fabricated continued page 94 Below Leadout guide Baeic Treiner provided drilling holes through plywood wing tip Plane opposite page concern changes made Primary Trainer basic plan presented last month see Plan Service page Observe CG position March1977 37 Above The wing-tip weight outboard can glued place piece hinge cloth mate rial prevent being jarred loose Article cludes stunt flying instructions Tail surfaces Advanced Trainer Note spruce reenforcement strips allow horizontal surfaces bolt place AT tail can easily substituted tail used Basic Trainer ENGINE CYLINDER HEADQUARTERS SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take hard work out radial engined models highly de f tailed cylinders precision molded high-impact styrene fea ture deep cooling fins SIZES Whirlwind 1 1 1/2PP 2 scales Le Rhone 1 1 1/2/P 2 scales Wasp 1 1 1/2P 2 scales LE RHONE Universal ales ALSO AVAILABLE MACHINE GUN KITS NERS E WHEELS TS 0 CANOPIES 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 PBA Special/Scott continued page 37 used connect innermost hole bellcrank outer hole flap horn elevators pushrod connects outer bellcrank hole elevator horn hole used should such travel elevator about three times opposition travel flaps Thus applying 450 UP elevator should result flaps being depressed about 150 use adjustable RC-type clevis fitting pushrods will greatly simplify setting up flaps Performance PBA Special will also enhanced fitting smaller wheels though done expense ground handling another lesson aeronautics practically design feature Aviation compro mise now again ready return aerodrome time Ad vanced trainer Advanced trainer will fly much Basic configuration did However larger wing wing flaps will allow model fly rather smoothly through maneuvers AMA Rule Book Precision Aerobatics can very demanding maneuvers accomplished contest stunt ships nothing combinations taught PBA Special take offs level flight loops wingovers inverted flight landing Thus under standing may proceed confidence area Control-line flying Happy landings lots ofem CL Navy Carrier/Perry continued page 47 standard Profile Carrier fuel tank mount ing unless tank partially full half-full tank however increases dis tance between fuel spray bar take off fuel goes back tank desired effect can obtained using uniflow tank uniflow tank has vent tube same mixture air ground fuel level should spray bar under both conditions FIGURE 2 FUEL TANK FOR PROFILE CARRIER EVEN WITI4 SPRAY BA 9 / / // K / -J Ii ii S FRONT fuel level engine sees point vent tube terminates within tank long vent im mersed fuel standard uniflow tank has vent tube near fuel pick-up point optimum Carrier cause causes greater apparent dis tance between fuel carburetor during acceleration apparent fuel level often outboard carburetor high speed tank use shown Fig 2 can adapted commercial squarewedge fuel tank must leak-proof fuel vent should near front tank spray bar look ing directly nose fill tank through vent airplane its nose separate vent tube use fill ing could added must plugged during flight having trouble engine runs being inconsistent using stock carburetor want increase engine output little expenditure time money give ideas try Richard L Perry 5016 Angelita Ave Dayton OH 45424 TOP VENT SIDE 94 Model Aviation 25t FOR COMPLETE CATALOG Dept MA 4 UNIVERSAL IS OUTSIDEFIGURE CIRCLE AT R[ST ACCEL FORCE IN FLIGHT - CK UP ENGINES COX/SANWA RIG SYSTEMS AIRTRONICS KITS Send complete catalog 1525 EWarner Ave Santa Ana CA 92702 HOBBIES -- --II -- .0 . . .- 0 %
Edition: Model Aviation - 1977/03
Page Numbers: 34, 35, 36, 37, 94
LAST MONTH introduced rather progressive concept control-line trainers result experience PHA Special its Primary guise should now able make some very nice smooth flights fact very likely feel about ready move excit ing flying Ordinarily would mean building entirely new ship PBA Special Its ready move So wash oil grime using good household cleaner such Fantastic trusty PHA clear off space workbench going show fly upside down airplane silly tIIZ4QDO SDCCkL Below The designers daughter displays both Basic Trainer left Advanced Train ercompare its adjacent 3-view Primary Trainer 3-view included last months installment about ship 34 Model Aviation Poised action background de signer aignalling son release Ad vanced Trainer Interesting headset boy wearing protect hearingmaybe youve noticed some engines leave tin gling sensation ears BASIC TRAINER pic deserves study Numerous design points structural features shown clearly Most significant wing saddle al lows updating ship progressive use three types wings first sheet plan provided entire Primary machine second sheet portrays additional com ponents required upgrade Primary trainer its subsequent Basic Ad vanced modes Basic wing begun cutting out necessary ribs plan laid upon absolutely flat surface pro tected against unwelcome intrusions glue sheet clear plastic food wrap Assembly wing slightly dif ferent previous wing construction based upon main spar trailing edge spar ribs glued two spars will leave front ribs sticking up air fol lowing two spars leading edge added After assembly solid may removed board remaining spar gussets added extra strength nice touch add soft 1 / 16 sheet balsa webs grain running ver tical between upper lower main spars After installing securely wing tip weight assembly may sanded smooth covered plywood tip-plates added whole doped Stop-action shot catches Advanced Trainer high lines up flaps down eleva tor AT version has full stunt capability Last month Primary Trainer version presented Now ready exciting flying PBA can modified Basic training finally Advanced training building new airplane improve responsiveness new larger elevator fitted option course whether use old stabilizer make new assembling Basic trainer necessary following 1 Install new stabilizer/elevator sembly connect pushrod 2 Remove fuel tank landing gear 3 Reinstall landing gear rear set mounting holes moving CG back thus will enhance ships re sponse controls additionally landings will less bouncy 4 Install new larger fuel tank 5 Secure new wing place Back aerodrome will quickly find revamped trainer flies very much did its earlier form except seems indeed respon sive control inputs suggest fly newly configured trainer level couple tanks full order get feel length time engine will run course shallow climbs dives during flights will also ac quaint better controls Re member controls will less jumpy Above Basic Trainer flies past bane fit photographer dont have make new wing Advanced Trainer unless wish Changes Basic Trainer wing involved removal tip plates addition builtup tips Advanced Trainer wing flaps coupled elevator keep arm stiff fly wrist easiest basic maneuvers wingover Remem ber gentle climbs dives men tioned earlier Simply series climbs making climb bit steeper its predecessor until find PRA Special describing right angle pull-up climbing straight over top flying circle down verti cal dive similar sharp pull-up will re store diving model level flight wingover point keep mind anytime starting fly note direc tion breeze want take off downwind anyway plan maneu vers model doing its maneu vers down-wind side flying circle say pilots back should towards wind breeze will help keep flying lines taut insure good control new pilot anxious loop ship its easy looks back wind arm still feed enough up nose ship up big curve As plane becomes vertical give additional up elevator creasing elevator deflection model comes around As nose comes up horizontal time level off Now frankly loop done manner may look very round probably will recover level flight good bit higher started loop safe way start practice confidence loops will become nice round After youve got loops looking pretty good youll ready go onto something bit different Pull up loop have doing time model reaches top loop neutralize controls Wow youre flying upside down Quickly pulling up~ model will finish loop Using technique extending loop can fly upside down lohg like 0112 LEADING EDGE H ADVANCED WING II I/A CENTER RIBADVANCED GYARILIZER I/B BALGG s HINGED AS FOR PRIMARY MODEL ADVANCED ELEVATOR KIT NYLON HINGE ___I CONNECTORI I/B FLAPDII/16WIRE NYLON FLAP HORN I/IAPLY FLAP REINFORCEMENT- LI I/BALGM TUBE BEARING LARGER FUEL TANK 72 GD CLARY OTUNT OPTIONAL GPINNER 0 00 WING PIECED OF FUEL LINE REVELED THGS WILL REDGCE DIPHONING MOVE LANDING GEAR TO REAR HOLED _IIjoI II II II I I FLAP POOH ROD GOLDERED C VIADJIJGTABLE CLEVID WI IRI 3ffi I/B WING TIP BIRD NOTE THID ID THE DECOND DHEET OF TWO PART PREDENT THE FIRDT DHEET PORTRAYG THE ENTIRE PRIMARY TRAINEE WHILE THIG GREET GHOWD ONLY THOGE MODIFICATIONS NEEDED TO UPGRADE THE PRIMARY TRAINER TO THE MORE CAPABLE BASIC TRAINER AND ADVANCED TRAINER CONFI FULL-SIZE PLANS AVAILABLESEE PAGE 96 NOTE THE PRIMARY WING PLAN PLAN SHEET ID USED IN CONDYF DURDEGUENT WINGS WHICH WILL THE CHANGED DHOWN HERE NOTEUNLEGD OTHERWIDE NOTED ID BALDA WIRE IG MUSIC Leadout guide detail AT version tip employs sheet balsa rib centerline fan-like rib pieces both top bottom sheet LINE GUIDE I/B GA KET LINE GUIDE DUPPORT WING TIP Il\ I I I/DRALSA CANOPY PSA SPEC/AL MULTI-PURPOGE CL TRAINER TRIO POSE SHOWS BASIC AND ADVANCED MODIFICATIONS DESIGNED Br FRANK SCOTT I IS IBASIC STABILIZER II/p BALSA I/AG 1/4 SPRUCE REINFORCEMENT II 0114 St 3/DDHOLED Fl---ELEVATOR HORN HINGEG AS FOR PRIMARY MODEL r I/IA PLY REINFORCEMENT II IRADIC ELEVATOR I _____ 36 Model Aviation Note inverted controls will seem reversed ie up elevator will cause ship pitch downwards vice-versa curiously fliers find easier fly inverted phase flight controlling hand laid over side ways palm up attempt turn handle over hand order fly upside down will likely result confused situation crash Also worry excessively about flying lines becoming twisted during loops wires can withstand quite few twists before controls start stiffen control lines may easily untwisted once model ground fact once have learned technique out side looping can easily keep lines straight flight doing oustide loops inside loops PBA Special its Basic configu ration will indeed perform basic ma neuvers encountered control-line flying possible remarkable 101 I I I I L.1/R5 1/4 SPRUCE IREINFORCEMENT I 3/32 DIA HOLES 4 NYLON ELEVATOR HORN 1/IAPLY REINFORCEMENT_____ PATCH WRAPPED FLAP i/A RIB II 00 l/16PLY BASIC TIP-PLATE 2 TIPPLATE LEADING EDGE 1 TIP DETAIL FOR BASIC WINS I/R GUSSET trainer few hours workbench Basic trainer can brought Advanced configuration per form considerably finesse Once again disassemble model wash accumulated oil grime Again stabilizer elevator assembly modified per plan reinstalled ship fuselage has balsa plas tic canopy added appearances sake wing undergoes essen tial modifications just may deem desirable build new wing rather revamp old Should wish pro ceed old however begin care fully removing plywood tip plates rounded wing tip structure built upon tip rib line guide added new tips covered doped Wing flaps cut sheet balsa sanded shape two flaps joined gether connector formed music wire epoxied place Note aluminum tube bearing placed connector Overlaying cloth patches will strengthen joints types hinges used flaps optional chose molded nylon hinges inserted slots out wings spruce trailing edge flap secured epoxy pins although traditional fabric hinge will entirely satisfactory flaps should finished model pictured flaps silked doped match wing control horn installed As before PRA Special assembled bolting horizontal tail surfaces place securing wing rubber bands hooking up controls though something new added must provide activation flaps short pushrod must fabricated continued page 94 Below Leadout guide Baeic Treiner provided drilling holes through plywood wing tip Plane opposite page concern changes made Primary Trainer basic plan presented last month see Plan Service page Observe CG position March1977 37 Above The wing-tip weight outboard can glued place piece hinge cloth mate rial prevent being jarred loose Article cludes stunt flying instructions Tail surfaces Advanced Trainer Note spruce reenforcement strips allow horizontal surfaces bolt place AT tail can easily substituted tail used Basic Trainer ENGINE CYLINDER HEADQUARTERS SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take hard work out radial engined models highly de f tailed cylinders precision molded high-impact styrene fea ture deep cooling fins SIZES Whirlwind 1 1 1/2PP 2 scales Le Rhone 1 1 1/2/P 2 scales Wasp 1 1 1/2P 2 scales LE RHONE Universal ales ALSO AVAILABLE MACHINE GUN KITS NERS E WHEELS TS 0 CANOPIES 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 PBA Special/Scott continued page 37 used connect innermost hole bellcrank outer hole flap horn elevators pushrod connects outer bellcrank hole elevator horn hole used should such travel elevator about three times opposition travel flaps Thus applying 450 UP elevator should result flaps being depressed about 150 use adjustable RC-type clevis fitting pushrods will greatly simplify setting up flaps Performance PBA Special will also enhanced fitting smaller wheels though done expense ground handling another lesson aeronautics practically design feature Aviation compro mise now again ready return aerodrome time Ad vanced trainer Advanced trainer will fly much Basic configuration did However larger wing wing flaps will allow model fly rather smoothly through maneuvers AMA Rule Book Precision Aerobatics can very demanding maneuvers accomplished contest stunt ships nothing combinations taught PBA Special take offs level flight loops wingovers inverted flight landing Thus under standing may proceed confidence area Control-line flying Happy landings lots ofem CL Navy Carrier/Perry continued page 47 standard Profile Carrier fuel tank mount ing unless tank partially full half-full tank however increases dis tance between fuel spray bar take off fuel goes back tank desired effect can obtained using uniflow tank uniflow tank has vent tube same mixture air ground fuel level should spray bar under both conditions FIGURE 2 FUEL TANK FOR PROFILE CARRIER EVEN WITI4 SPRAY BA 9 / / // K / -J Ii ii S FRONT fuel level engine sees point vent tube terminates within tank long vent im mersed fuel standard uniflow tank has vent tube near fuel pick-up point optimum Carrier cause causes greater apparent dis tance between fuel carburetor during acceleration apparent fuel level often outboard carburetor high speed tank use shown Fig 2 can adapted commercial squarewedge fuel tank must leak-proof fuel vent should near front tank spray bar look ing directly nose fill tank through vent airplane its nose separate vent tube use fill ing could added must plugged during flight having trouble engine runs being inconsistent using stock carburetor want increase engine output little expenditure time money give ideas try Richard L Perry 5016 Angelita Ave Dayton OH 45424 TOP VENT SIDE 94 Model Aviation 25t FOR COMPLETE CATALOG Dept MA 4 UNIVERSAL IS OUTSIDEFIGURE CIRCLE AT R[ST ACCEL FORCE IN FLIGHT - CK UP ENGINES COX/SANWA RIG SYSTEMS AIRTRONICS KITS Send complete catalog 1525 EWarner Ave Santa Ana CA 92702 HOBBIES -- --II -- .0 . . .- 0 %
Edition: Model Aviation - 1977/03
Page Numbers: 34, 35, 36, 37, 94
LAST MONTH introduced rather progressive concept control-line trainers result experience PHA Special its Primary guise should now able make some very nice smooth flights fact very likely feel about ready move excit ing flying Ordinarily would mean building entirely new ship PBA Special Its ready move So wash oil grime using good household cleaner such Fantastic trusty PHA clear off space workbench going show fly upside down airplane silly tIIZ4QDO SDCCkL Below The designers daughter displays both Basic Trainer left Advanced Train ercompare its adjacent 3-view Primary Trainer 3-view included last months installment about ship 34 Model Aviation Poised action background de signer aignalling son release Ad vanced Trainer Interesting headset boy wearing protect hearingmaybe youve noticed some engines leave tin gling sensation ears BASIC TRAINER pic deserves study Numerous design points structural features shown clearly Most significant wing saddle al lows updating ship progressive use three types wings first sheet plan provided entire Primary machine second sheet portrays additional com ponents required upgrade Primary trainer its subsequent Basic Ad vanced modes Basic wing begun cutting out necessary ribs plan laid upon absolutely flat surface pro tected against unwelcome intrusions glue sheet clear plastic food wrap Assembly wing slightly dif ferent previous wing construction based upon main spar trailing edge spar ribs glued two spars will leave front ribs sticking up air fol lowing two spars leading edge added After assembly solid may removed board remaining spar gussets added extra strength nice touch add soft 1 / 16 sheet balsa webs grain running ver tical between upper lower main spars After installing securely wing tip weight assembly may sanded smooth covered plywood tip-plates added whole doped Stop-action shot catches Advanced Trainer high lines up flaps down eleva tor AT version has full stunt capability Last month Primary Trainer version presented Now ready exciting flying PBA can modified Basic training finally Advanced training building new airplane improve responsiveness new larger elevator fitted option course whether use old stabilizer make new assembling Basic trainer necessary following 1 Install new stabilizer/elevator sembly connect pushrod 2 Remove fuel tank landing gear 3 Reinstall landing gear rear set mounting holes moving CG back thus will enhance ships re sponse controls additionally landings will less bouncy 4 Install new larger fuel tank 5 Secure new wing place Back aerodrome will quickly find revamped trainer flies very much did its earlier form except seems indeed respon sive control inputs suggest fly newly configured trainer level couple tanks full order get feel length time engine will run course shallow climbs dives during flights will also ac quaint better controls Re member controls will less jumpy Above Basic Trainer flies past bane fit photographer dont have make new wing Advanced Trainer unless wish Changes Basic Trainer wing involved removal tip plates addition builtup tips Advanced Trainer wing flaps coupled elevator keep arm stiff fly wrist easiest basic maneuvers wingover Remem ber gentle climbs dives men tioned earlier Simply series climbs making climb bit steeper its predecessor until find PRA Special describing right angle pull-up climbing straight over top flying circle down verti cal dive similar sharp pull-up will re store diving model level flight wingover point keep mind anytime starting fly note direc tion breeze want take off downwind anyway plan maneu vers model doing its maneu vers down-wind side flying circle say pilots back should towards wind breeze will help keep flying lines taut insure good control new pilot anxious loop ship its easy looks back wind arm still feed enough up nose ship up big curve As plane becomes vertical give additional up elevator creasing elevator deflection model comes around As nose comes up horizontal time level off Now frankly loop done manner may look very round probably will recover level flight good bit higher started loop safe way start practice confidence loops will become nice round After youve got loops looking pretty good youll ready go onto something bit different Pull up loop have doing time model reaches top loop neutralize controls Wow youre flying upside down Quickly pulling up~ model will finish loop Using technique extending loop can fly upside down lohg like 0112 LEADING EDGE H ADVANCED WING II I/A CENTER RIBADVANCED GYARILIZER I/B BALGG s HINGED AS FOR PRIMARY MODEL ADVANCED ELEVATOR KIT NYLON HINGE ___I CONNECTORI I/B FLAPDII/16WIRE NYLON FLAP HORN I/IAPLY FLAP REINFORCEMENT- LI I/BALGM TUBE BEARING LARGER FUEL TANK 72 GD CLARY OTUNT OPTIONAL GPINNER 0 00 WING PIECED OF FUEL LINE REVELED THGS WILL REDGCE DIPHONING MOVE LANDING GEAR TO REAR HOLED _IIjoI II II II I I FLAP POOH ROD GOLDERED C VIADJIJGTABLE CLEVID WI IRI 3ffi I/B WING TIP BIRD NOTE THID ID THE DECOND DHEET OF TWO PART PREDENT THE FIRDT DHEET PORTRAYG THE ENTIRE PRIMARY TRAINEE WHILE THIG GREET GHOWD ONLY THOGE MODIFICATIONS NEEDED TO UPGRADE THE PRIMARY TRAINER TO THE MORE CAPABLE BASIC TRAINER AND ADVANCED TRAINER CONFI FULL-SIZE PLANS AVAILABLESEE PAGE 96 NOTE THE PRIMARY WING PLAN PLAN SHEET ID USED IN CONDYF DURDEGUENT WINGS WHICH WILL THE CHANGED DHOWN HERE NOTEUNLEGD OTHERWIDE NOTED ID BALDA WIRE IG MUSIC Leadout guide detail AT version tip employs sheet balsa rib centerline fan-like rib pieces both top bottom sheet LINE GUIDE I/B GA KET LINE GUIDE DUPPORT WING TIP Il\ I I I/DRALSA CANOPY PSA SPEC/AL MULTI-PURPOGE CL TRAINER TRIO POSE SHOWS BASIC AND ADVANCED MODIFICATIONS DESIGNED Br FRANK SCOTT I IS IBASIC STABILIZER II/p BALSA I/AG 1/4 SPRUCE REINFORCEMENT II 0114 St 3/DDHOLED Fl---ELEVATOR HORN HINGEG AS FOR PRIMARY MODEL r I/IA PLY REINFORCEMENT II IRADIC ELEVATOR I _____ 36 Model Aviation Note inverted controls will seem reversed ie up elevator will cause ship pitch downwards vice-versa curiously fliers find easier fly inverted phase flight controlling hand laid over side ways palm up attempt turn handle over hand order fly upside down will likely result confused situation crash Also worry excessively about flying lines becoming twisted during loops wires can withstand quite few twists before controls start stiffen control lines may easily untwisted once model ground fact once have learned technique out side looping can easily keep lines straight flight doing oustide loops inside loops PBA Special its Basic configu ration will indeed perform basic ma neuvers encountered control-line flying possible remarkable 101 I I I I L.1/R5 1/4 SPRUCE IREINFORCEMENT I 3/32 DIA HOLES 4 NYLON ELEVATOR HORN 1/IAPLY REINFORCEMENT_____ PATCH WRAPPED FLAP i/A RIB II 00 l/16PLY BASIC TIP-PLATE 2 TIPPLATE LEADING EDGE 1 TIP DETAIL FOR BASIC WINS I/R GUSSET trainer few hours workbench Basic trainer can brought Advanced configuration per form considerably finesse Once again disassemble model wash accumulated oil grime Again stabilizer elevator assembly modified per plan reinstalled ship fuselage has balsa plas tic canopy added appearances sake wing undergoes essen tial modifications just may deem desirable build new wing rather revamp old Should wish pro ceed old however begin care fully removing plywood tip plates rounded wing tip structure built upon tip rib line guide added new tips covered doped Wing flaps cut sheet balsa sanded shape two flaps joined gether connector formed music wire epoxied place Note aluminum tube bearing placed connector Overlaying cloth patches will strengthen joints types hinges used flaps optional chose molded nylon hinges inserted slots out wings spruce trailing edge flap secured epoxy pins although traditional fabric hinge will entirely satisfactory flaps should finished model pictured flaps silked doped match wing control horn installed As before PRA Special assembled bolting horizontal tail surfaces place securing wing rubber bands hooking up controls though something new added must provide activation flaps short pushrod must fabricated continued page 94 Below Leadout guide Baeic Treiner provided drilling holes through plywood wing tip Plane opposite page concern changes made Primary Trainer basic plan presented last month see Plan Service page Observe CG position March1977 37 Above The wing-tip weight outboard can glued place piece hinge cloth mate rial prevent being jarred loose Article cludes stunt flying instructions Tail surfaces Advanced Trainer Note spruce reenforcement strips allow horizontal surfaces bolt place AT tail can easily substituted tail used Basic Trainer ENGINE CYLINDER HEADQUARTERS SUITABLE FOR SCALE OR STAND-OFF MODELS AVAILABLE FOR IMMEDIATE DELIVERY Take hard work out radial engined models highly de f tailed cylinders precision molded high-impact styrene fea ture deep cooling fins SIZES Whirlwind 1 1 1/2PP 2 scales Le Rhone 1 1 1/2/P 2 scales Wasp 1 1 1/2P 2 scales LE RHONE Universal ales ALSO AVAILABLE MACHINE GUN KITS NERS E WHEELS TS 0 CANOPIES 181 PAWNEE STREET SAN MARCOS CALIFORNIA 9 PBA Special/Scott continued page 37 used connect innermost hole bellcrank outer hole flap horn elevators pushrod connects outer bellcrank hole elevator horn hole used should such travel elevator about three times opposition travel flaps Thus applying 450 UP elevator should result flaps being depressed about 150 use adjustable RC-type clevis fitting pushrods will greatly simplify setting up flaps Performance PBA Special will also enhanced fitting smaller wheels though done expense ground handling another lesson aeronautics practically design feature Aviation compro mise now again ready return aerodrome time Ad vanced trainer Advanced trainer will fly much Basic configuration did However larger wing wing flaps will allow model fly rather smoothly through maneuvers AMA Rule Book Precision Aerobatics can very demanding maneuvers accomplished contest stunt ships nothing combinations taught PBA Special take offs level flight loops wingovers inverted flight landing Thus under standing may proceed confidence area Control-line flying Happy landings lots ofem CL Navy Carrier/Perry continued page 47 standard Profile Carrier fuel tank mount ing unless tank partially full half-full tank however increases dis tance between fuel spray bar take off fuel goes back tank desired effect can obtained using uniflow tank uniflow tank has vent tube same mixture air ground fuel level should spray bar under both conditions FIGURE 2 FUEL TANK FOR PROFILE CARRIER EVEN WITI4 SPRAY BA 9 / / // K / -J Ii ii S FRONT fuel level engine sees point vent tube terminates within tank long vent im mersed fuel standard uniflow tank has vent tube near fuel pick-up point optimum Carrier cause causes greater apparent dis tance between fuel carburetor during acceleration apparent fuel level often outboard carburetor high speed tank use shown Fig 2 can adapted commercial squarewedge fuel tank must leak-proof fuel vent should near front tank spray bar look ing directly nose fill tank through vent airplane its nose separate vent tube use fill ing could added must plugged during flight having trouble engine runs being inconsistent using stock carburetor want increase engine output little expenditure time money give ideas try Richard L Perry 5016 Angelita Ave Dayton OH 45424 TOP VENT SIDE 94 Model Aviation 25t FOR COMPLETE CATALOG Dept MA 4 UNIVERSAL IS OUTSIDEFIGURE CIRCLE AT R[ST ACCEL FORCE IN FLIGHT - CK UP ENGINES COX/SANWA RIG SYSTEMS AIRTRONICS KITS Send complete catalog 1525 EWarner Ave Santa Ana CA 92702 HOBBIES -- --II -- .0 . . .- 0 %