EACH week receive two three nice letters readers Some ask questions become nucleus column letter Tom Wailer Blue Angels R/C Club asks question seems making rounds .Im building Sig-designed Piper J-3 Cub mean Im using plans kit otherwise its scratch-built Since has 72-in wing span want install individual aileron servos out wing may allow induction stray RF currents long almost 24 inches wing pan el servo leads Ive read somewhere prevent should use choke coils leads OK what size three wires servo end receiver end Next question about shielded leads will necessary tie shields together Should connected part servo circuit er continues other mat ters including comment tor club newsletter get al no feedback know what mean Tom Ive edited few time same complaint newsletter editors have So reading go over editor tell him much appreciate what hes doing First what choke Structural ly choke coil wire Electrically choke device puts high AC resistance wire retaining low DC resistance reasoning leads insertion chokes wires runs follows long wire acts antenna order prevent radio signals AC running wire choke off never get something nothing Pick RF choke out parts box marked 27 H slap ohm-meter Surprise go ing read couple ohms DC resis tance Put 2 ohms power lead average servo will cut available torque 20% Put lead youll down 2/3 power moving lot slower Any available RF choke will definitely job need low DC resistance Before looking further pick right choke lets look sit radio installed latest creation radio nervous servos jitter chatter Without careful before-and after measurements nobody can say exactly can perform few tests find out First rearrange servo leads Try keep connection short direct between receiver servos Try also keep servo leads far antenna possible right angles possible Keep antenna away servos metal-to-metal moving parts Next check wires fractured strands Pay particular attention points wires exit plugs cases Also check carefully place bent sharply previous installation Check tenna too Clean and/or replace servo motor seems have relation problem dirty commutator sets up sparking generates RF energy Most servos have small capacitors fitted shunt RF directly power lead servo case caps have known fail Try shunting another cap same value situation gets better replace defective part youve just identified Replace battery pack fresh Long leads add resistance system Sometimes add just enough show up battery pack thats ready go over hill Have system re-tuned right airplane Old Days tuning plane way go Its still good way get optimum per formance Wrap servo leads strips aluminum foil join strips end possible local oscillator receiver radiat ing strong enough signal tenna picked up servo leads reintroduced circuit shouldnt Dont wrap antenna though will definitely put off air possible long servo ex tensions run parallel antenna act reflector Remember grem lins 27MHz sig nals reflected fences water towers such havent killed shift 72MHz forced work smaller spaces could providing ideal space 16 Model Aviation Top bottom Ace Bantam Midget servo sizethe Radio Shack 273-101 choke standard RF choke size commonly used radios larger size heavier wire used constructing Radio Shack choke immediately apparent fact times larger Deans plug servo pigtail wrapping leads aluminum foil will make situation worse cure get entenna heading new direction Perhaps can run down tube wing make diamond skipping tip tip around tail Youve done above radio still jittery Have considered buying another radio Maybe did transmitter Dont laugh too hard Its happened OK nothing else works its time try choke Begin Radio Shack item No 273-101 rated OlmH 15 amps Cut positive lead long extension cable about inch end plugs receiver Connect cut ends lead choke solder place try again problem goes away fine try putting negative lead also Dont put control signal lead because wrn round off control pulses introducing new kind trouble may some good con nect 1 -mfd capacitor posi tive negative wire either chokes idea shunt across power supply lines reactance less internal resistance battery pack Its good idea hard accomplish batteries nickle-cadmium types cell resistance less 1/10 ohm Besides reactance both choke capacitor function frequency RF trying deal havent measured frequency really dont know what doing just assume interfering signal about 72MHz act accordingly basic premise discus sion interfering signal com ing set way power leads Since power supply touches part circuit such signal can get part circuit Nickel-cadmium batteries have very low characteristic impedance good condition signal coming power supply leads would have have fairly high voltage look around things will induce high voltages pretty hard find normal RC situation Therefore have trouble after conducting above checks fixes have big trouble should relatively easy find help friendly local Ham Amateur Radio Operator ask him help might make few new friends Continued page 95 May1979 17 Typical size type model could require long servo leads depending upon servo location %scale J-3 Cub Most guys get away long leadsnotably aileron servos wingbut some dont sticky business chokes J-3 Walt Moucha Jrs winning flight Bealton last year Iattern jobs aecoratave vans although what drivers might have common dont know Anyway Earl Haurys 9-lb Utopia Row engine Zinger prop Rhom retracts Busy him checking out something scientifically helper Peter Lepir FOR THE SOARING BUFF supertape applies stickey brushing masking Its stronger typical R/C building material lt weighs 1 gin per sq ft building area lts 0005 thick Its ready instant apply Sits quickest efficient method applying balsa greenskin other skin foam wing cores Plus dozens other great uses Try 3/8roll $479 1roli $795 2roIl $1595 ALL ROLLS ARE 2160 LONG SUPERWINGS superwings Portfolio Everything need know create own super-performance sailplane completely illustrated difinative work 20 pages packed technical data charts diagrams step-bystep instructions million $ worth information interested obtaining winning edge sailplane performance Hi Johnson Only $150 11015 Glenoaks Blvd Pacoima CA 91331 Tel 12131 8994312J Openers/Winter continued page 4 Over Don Srulls drawing table big homemade projector Finally opted two best looking draw ings scaled side view size multiplied 5 would give us model profile Another drawing scaled multiplication 8this planform Srull Bowers old wizard Ned Kragness bull session us during projected color slides Antique Aircraft Museum Ned explained tube nut bolt weve whipping out sheets drawings cross sections started over three times What now trying to freeze reason able level scalethis Sport Scale modeland crate has flown crank numerous minute cor rections final drawing Everyone has advice ought scale exhaust etcyou know Ned wants us build up Warren Truss ribs little ply gussets eyes roll said would cov ered painted would know what inside absolutely horrified Come fel lows wanted nice crate fly no competition just long does exhibit visual errors Now know what scale guys go through documentation begins insidiously builds builds like anvil-head thunderstorm Research becomes game itself fascinating enjoyable tend forget model Research unveiled hobby itself within could enjoy life time hobby uncontrolled documenta tion single design single airplane What license numbers ship building Which varia tion really copying find stringers no knew about nobody shows drawing Longerons shown curved drawing engineer types tell us thats no-nothat steel tube never bowed because its compression strength would shot darn wheeis 7 inches have make supposed fun project So well put Williams biggest6 inches maybe replace later big gest Williams cylinders e Gnome rotary make 7cylinder Warner out Now Fox 78 extension shaft mount ed 8 oclock put its head between dummy cylindersbut head doesnt show anyway have epoxy allergy Murder Now what So some guys tell us fool long enough stuff allergy part game fumes Being editor have big advantage three weeks research would take six months year otherwise Now hung up wing tipsnothing accur ate front view everything dis agreement Sooner later well back track make detailed drawings tail wheel assembly etcwe hope Time becomes meaningless Whereas building always frantic rush get air now feel enjoyment building big deal really dont care youll get done Enjoy step drawings look like road map rural Saudi Arabiavast open Spaces Will live long enough see thing fly cares get field got station wagon cares shop 9 x 12 three six-foot airplanes hang plus bench plus drawing table plus couch usually cat Aristocrat can assembled indoors Now dig guys built Tower Babel Pyramids Eiffel Tower Maybe should have stuck rubberscale guys Join us next Saturday after noon episode 15 Radio Technique/Myers continued page 17 dealing subject called EMI Electro-Magnetic Interference According experts getting rid EMI art science Whatever works right thing other hand flying buddy Nick Ziroli has building flying types models years ranging hA 200-pound RPVs Nick says has never found need chokes set working cor rectly before installed So having trouble likely caused wear tear will yield solutions proposed above Owners Kraft radios can purchase special harness No 200-193 direct factory containing chokes proper size use 22 H highcurrent chokes must specify system harness used cause Kraft has used several types connectors over years several patterns connections might make leads up other brands ask nicely dont know sure worst can happen say no February 1979 issue QST magazine has feature story device called Incon need choke filter Incon looks like good pos sible solution Youll have make own want because isnt production yet above bits information given BOB ABERLE W2QPP Keep letters coming folks Id par ticularly like hear some folks have solved problems George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Waco/Sru II continued page 23 appropriate ribs clothes pins work well slip N struts place Move clips around until nice fit obtained spot glue clips small dab epoxy epoxy sets remove struts secure clips plenty epoxy a rib scabs cowl shown plans simple light strong First build balsa drum like frame Sand outside surface smooth perfect circle Next cut heavy May1979 95 SCALE CLASICS Plans & Construction Manual CuRTiSS HAWK P8E STINSON RELIANT SR8 /eScaleg4eSpan 22W WScaIe 126 Span 25e0 2Scale 83 Span e12 2Scale 84 Span e15 1W Scale 47VeSpan lO L 1WScle 83 Spanl2O CURTISS GOSHAWK Filce 2 Scale 83 Spar 81500 CURTiSS OuLFHAWK lA . 2Scale 63 Span 81800 / Scale 84W Span 53O50 Please Add SISO Fe Ode FosteSe a,d I-ladflfla. OteldeUS Add SSOOMake PaytneOta tO Richard G Barron1213 Hoily Spring Ln Grand Biano MichIgan 48439 Sed 510010 COetelete lflftetloC
Edition: Model Aviation - 1979/05
Page Numbers: 16, 17, 95
EACH week receive two three nice letters readers Some ask questions become nucleus column letter Tom Wailer Blue Angels R/C Club asks question seems making rounds .Im building Sig-designed Piper J-3 Cub mean Im using plans kit otherwise its scratch-built Since has 72-in wing span want install individual aileron servos out wing may allow induction stray RF currents long almost 24 inches wing pan el servo leads Ive read somewhere prevent should use choke coils leads OK what size three wires servo end receiver end Next question about shielded leads will necessary tie shields together Should connected part servo circuit er continues other mat ters including comment tor club newsletter get al no feedback know what mean Tom Ive edited few time same complaint newsletter editors have So reading go over editor tell him much appreciate what hes doing First what choke Structural ly choke coil wire Electrically choke device puts high AC resistance wire retaining low DC resistance reasoning leads insertion chokes wires runs follows long wire acts antenna order prevent radio signals AC running wire choke off never get something nothing Pick RF choke out parts box marked 27 H slap ohm-meter Surprise go ing read couple ohms DC resis tance Put 2 ohms power lead average servo will cut available torque 20% Put lead youll down 2/3 power moving lot slower Any available RF choke will definitely job need low DC resistance Before looking further pick right choke lets look sit radio installed latest creation radio nervous servos jitter chatter Without careful before-and after measurements nobody can say exactly can perform few tests find out First rearrange servo leads Try keep connection short direct between receiver servos Try also keep servo leads far antenna possible right angles possible Keep antenna away servos metal-to-metal moving parts Next check wires fractured strands Pay particular attention points wires exit plugs cases Also check carefully place bent sharply previous installation Check tenna too Clean and/or replace servo motor seems have relation problem dirty commutator sets up sparking generates RF energy Most servos have small capacitors fitted shunt RF directly power lead servo case caps have known fail Try shunting another cap same value situation gets better replace defective part youve just identified Replace battery pack fresh Long leads add resistance system Sometimes add just enough show up battery pack thats ready go over hill Have system re-tuned right airplane Old Days tuning plane way go Its still good way get optimum per formance Wrap servo leads strips aluminum foil join strips end possible local oscillator receiver radiat ing strong enough signal tenna picked up servo leads reintroduced circuit shouldnt Dont wrap antenna though will definitely put off air possible long servo ex tensions run parallel antenna act reflector Remember grem lins 27MHz sig nals reflected fences water towers such havent killed shift 72MHz forced work smaller spaces could providing ideal space 16 Model Aviation Top bottom Ace Bantam Midget servo sizethe Radio Shack 273-101 choke standard RF choke size commonly used radios larger size heavier wire used constructing Radio Shack choke immediately apparent fact times larger Deans plug servo pigtail wrapping leads aluminum foil will make situation worse cure get entenna heading new direction Perhaps can run down tube wing make diamond skipping tip tip around tail Youve done above radio still jittery Have considered buying another radio Maybe did transmitter Dont laugh too hard Its happened OK nothing else works its time try choke Begin Radio Shack item No 273-101 rated OlmH 15 amps Cut positive lead long extension cable about inch end plugs receiver Connect cut ends lead choke solder place try again problem goes away fine try putting negative lead also Dont put control signal lead because wrn round off control pulses introducing new kind trouble may some good con nect 1 -mfd capacitor posi tive negative wire either chokes idea shunt across power supply lines reactance less internal resistance battery pack Its good idea hard accomplish batteries nickle-cadmium types cell resistance less 1/10 ohm Besides reactance both choke capacitor function frequency RF trying deal havent measured frequency really dont know what doing just assume interfering signal about 72MHz act accordingly basic premise discus sion interfering signal com ing set way power leads Since power supply touches part circuit such signal can get part circuit Nickel-cadmium batteries have very low characteristic impedance good condition signal coming power supply leads would have have fairly high voltage look around things will induce high voltages pretty hard find normal RC situation Therefore have trouble after conducting above checks fixes have big trouble should relatively easy find help friendly local Ham Amateur Radio Operator ask him help might make few new friends Continued page 95 May1979 17 Typical size type model could require long servo leads depending upon servo location %scale J-3 Cub Most guys get away long leadsnotably aileron servos wingbut some dont sticky business chokes J-3 Walt Moucha Jrs winning flight Bealton last year Iattern jobs aecoratave vans although what drivers might have common dont know Anyway Earl Haurys 9-lb Utopia Row engine Zinger prop Rhom retracts Busy him checking out something scientifically helper Peter Lepir FOR THE SOARING BUFF supertape applies stickey brushing masking Its stronger typical R/C building material lt weighs 1 gin per sq ft building area lts 0005 thick Its ready instant apply Sits quickest efficient method applying balsa greenskin other skin foam wing cores Plus dozens other great uses Try 3/8roll $479 1roli $795 2roIl $1595 ALL ROLLS ARE 2160 LONG SUPERWINGS superwings Portfolio Everything need know create own super-performance sailplane completely illustrated difinative work 20 pages packed technical data charts diagrams step-bystep instructions million $ worth information interested obtaining winning edge sailplane performance Hi Johnson Only $150 11015 Glenoaks Blvd Pacoima CA 91331 Tel 12131 8994312J Openers/Winter continued page 4 Over Don Srulls drawing table big homemade projector Finally opted two best looking draw ings scaled side view size multiplied 5 would give us model profile Another drawing scaled multiplication 8this planform Srull Bowers old wizard Ned Kragness bull session us during projected color slides Antique Aircraft Museum Ned explained tube nut bolt weve whipping out sheets drawings cross sections started over three times What now trying to freeze reason able level scalethis Sport Scale modeland crate has flown crank numerous minute cor rections final drawing Everyone has advice ought scale exhaust etcyou know Ned wants us build up Warren Truss ribs little ply gussets eyes roll said would cov ered painted would know what inside absolutely horrified Come fel lows wanted nice crate fly no competition just long does exhibit visual errors Now know what scale guys go through documentation begins insidiously builds builds like anvil-head thunderstorm Research becomes game itself fascinating enjoyable tend forget model Research unveiled hobby itself within could enjoy life time hobby uncontrolled documenta tion single design single airplane What license numbers ship building Which varia tion really copying find stringers no knew about nobody shows drawing Longerons shown curved drawing engineer types tell us thats no-nothat steel tube never bowed because its compression strength would shot darn wheeis 7 inches have make supposed fun project So well put Williams biggest6 inches maybe replace later big gest Williams cylinders e Gnome rotary make 7cylinder Warner out Now Fox 78 extension shaft mount ed 8 oclock put its head between dummy cylindersbut head doesnt show anyway have epoxy allergy Murder Now what So some guys tell us fool long enough stuff allergy part game fumes Being editor have big advantage three weeks research would take six months year otherwise Now hung up wing tipsnothing accur ate front view everything dis agreement Sooner later well back track make detailed drawings tail wheel assembly etcwe hope Time becomes meaningless Whereas building always frantic rush get air now feel enjoyment building big deal really dont care youll get done Enjoy step drawings look like road map rural Saudi Arabiavast open Spaces Will live long enough see thing fly cares get field got station wagon cares shop 9 x 12 three six-foot airplanes hang plus bench plus drawing table plus couch usually cat Aristocrat can assembled indoors Now dig guys built Tower Babel Pyramids Eiffel Tower Maybe should have stuck rubberscale guys Join us next Saturday after noon episode 15 Radio Technique/Myers continued page 17 dealing subject called EMI Electro-Magnetic Interference According experts getting rid EMI art science Whatever works right thing other hand flying buddy Nick Ziroli has building flying types models years ranging hA 200-pound RPVs Nick says has never found need chokes set working cor rectly before installed So having trouble likely caused wear tear will yield solutions proposed above Owners Kraft radios can purchase special harness No 200-193 direct factory containing chokes proper size use 22 H highcurrent chokes must specify system harness used cause Kraft has used several types connectors over years several patterns connections might make leads up other brands ask nicely dont know sure worst can happen say no February 1979 issue QST magazine has feature story device called Incon need choke filter Incon looks like good pos sible solution Youll have make own want because isnt production yet above bits information given BOB ABERLE W2QPP Keep letters coming folks Id par ticularly like hear some folks have solved problems George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Waco/Sru II continued page 23 appropriate ribs clothes pins work well slip N struts place Move clips around until nice fit obtained spot glue clips small dab epoxy epoxy sets remove struts secure clips plenty epoxy a rib scabs cowl shown plans simple light strong First build balsa drum like frame Sand outside surface smooth perfect circle Next cut heavy May1979 95 SCALE CLASICS Plans & Construction Manual CuRTiSS HAWK P8E STINSON RELIANT SR8 /eScaleg4eSpan 22W WScaIe 126 Span 25e0 2Scale 83 Span e12 2Scale 84 Span e15 1W Scale 47VeSpan lO L 1WScle 83 Spanl2O CURTISS GOSHAWK Filce 2 Scale 83 Spar 81500 CURTiSS OuLFHAWK lA . 2Scale 63 Span 81800 / Scale 84W Span 53O50 Please Add SISO Fe Ode FosteSe a,d I-ladflfla. OteldeUS Add SSOOMake PaytneOta tO Richard G Barron1213 Hoily Spring Ln Grand Biano MichIgan 48439 Sed 510010 COetelete lflftetloC
Edition: Model Aviation - 1979/05
Page Numbers: 16, 17, 95
EACH week receive two three nice letters readers Some ask questions become nucleus column letter Tom Wailer Blue Angels R/C Club asks question seems making rounds .Im building Sig-designed Piper J-3 Cub mean Im using plans kit otherwise its scratch-built Since has 72-in wing span want install individual aileron servos out wing may allow induction stray RF currents long almost 24 inches wing pan el servo leads Ive read somewhere prevent should use choke coils leads OK what size three wires servo end receiver end Next question about shielded leads will necessary tie shields together Should connected part servo circuit er continues other mat ters including comment tor club newsletter get al no feedback know what mean Tom Ive edited few time same complaint newsletter editors have So reading go over editor tell him much appreciate what hes doing First what choke Structural ly choke coil wire Electrically choke device puts high AC resistance wire retaining low DC resistance reasoning leads insertion chokes wires runs follows long wire acts antenna order prevent radio signals AC running wire choke off never get something nothing Pick RF choke out parts box marked 27 H slap ohm-meter Surprise go ing read couple ohms DC resis tance Put 2 ohms power lead average servo will cut available torque 20% Put lead youll down 2/3 power moving lot slower Any available RF choke will definitely job need low DC resistance Before looking further pick right choke lets look sit radio installed latest creation radio nervous servos jitter chatter Without careful before-and after measurements nobody can say exactly can perform few tests find out First rearrange servo leads Try keep connection short direct between receiver servos Try also keep servo leads far antenna possible right angles possible Keep antenna away servos metal-to-metal moving parts Next check wires fractured strands Pay particular attention points wires exit plugs cases Also check carefully place bent sharply previous installation Check tenna too Clean and/or replace servo motor seems have relation problem dirty commutator sets up sparking generates RF energy Most servos have small capacitors fitted shunt RF directly power lead servo case caps have known fail Try shunting another cap same value situation gets better replace defective part youve just identified Replace battery pack fresh Long leads add resistance system Sometimes add just enough show up battery pack thats ready go over hill Have system re-tuned right airplane Old Days tuning plane way go Its still good way get optimum per formance Wrap servo leads strips aluminum foil join strips end possible local oscillator receiver radiat ing strong enough signal tenna picked up servo leads reintroduced circuit shouldnt Dont wrap antenna though will definitely put off air possible long servo ex tensions run parallel antenna act reflector Remember grem lins 27MHz sig nals reflected fences water towers such havent killed shift 72MHz forced work smaller spaces could providing ideal space 16 Model Aviation Top bottom Ace Bantam Midget servo sizethe Radio Shack 273-101 choke standard RF choke size commonly used radios larger size heavier wire used constructing Radio Shack choke immediately apparent fact times larger Deans plug servo pigtail wrapping leads aluminum foil will make situation worse cure get entenna heading new direction Perhaps can run down tube wing make diamond skipping tip tip around tail Youve done above radio still jittery Have considered buying another radio Maybe did transmitter Dont laugh too hard Its happened OK nothing else works its time try choke Begin Radio Shack item No 273-101 rated OlmH 15 amps Cut positive lead long extension cable about inch end plugs receiver Connect cut ends lead choke solder place try again problem goes away fine try putting negative lead also Dont put control signal lead because wrn round off control pulses introducing new kind trouble may some good con nect 1 -mfd capacitor posi tive negative wire either chokes idea shunt across power supply lines reactance less internal resistance battery pack Its good idea hard accomplish batteries nickle-cadmium types cell resistance less 1/10 ohm Besides reactance both choke capacitor function frequency RF trying deal havent measured frequency really dont know what doing just assume interfering signal about 72MHz act accordingly basic premise discus sion interfering signal com ing set way power leads Since power supply touches part circuit such signal can get part circuit Nickel-cadmium batteries have very low characteristic impedance good condition signal coming power supply leads would have have fairly high voltage look around things will induce high voltages pretty hard find normal RC situation Therefore have trouble after conducting above checks fixes have big trouble should relatively easy find help friendly local Ham Amateur Radio Operator ask him help might make few new friends Continued page 95 May1979 17 Typical size type model could require long servo leads depending upon servo location %scale J-3 Cub Most guys get away long leadsnotably aileron servos wingbut some dont sticky business chokes J-3 Walt Moucha Jrs winning flight Bealton last year Iattern jobs aecoratave vans although what drivers might have common dont know Anyway Earl Haurys 9-lb Utopia Row engine Zinger prop Rhom retracts Busy him checking out something scientifically helper Peter Lepir FOR THE SOARING BUFF supertape applies stickey brushing masking Its stronger typical R/C building material lt weighs 1 gin per sq ft building area lts 0005 thick Its ready instant apply Sits quickest efficient method applying balsa greenskin other skin foam wing cores Plus dozens other great uses Try 3/8roll $479 1roli $795 2roIl $1595 ALL ROLLS ARE 2160 LONG SUPERWINGS superwings Portfolio Everything need know create own super-performance sailplane completely illustrated difinative work 20 pages packed technical data charts diagrams step-bystep instructions million $ worth information interested obtaining winning edge sailplane performance Hi Johnson Only $150 11015 Glenoaks Blvd Pacoima CA 91331 Tel 12131 8994312J Openers/Winter continued page 4 Over Don Srulls drawing table big homemade projector Finally opted two best looking draw ings scaled side view size multiplied 5 would give us model profile Another drawing scaled multiplication 8this planform Srull Bowers old wizard Ned Kragness bull session us during projected color slides Antique Aircraft Museum Ned explained tube nut bolt weve whipping out sheets drawings cross sections started over three times What now trying to freeze reason able level scalethis Sport Scale modeland crate has flown crank numerous minute cor rections final drawing Everyone has advice ought scale exhaust etcyou know Ned wants us build up Warren Truss ribs little ply gussets eyes roll said would cov ered painted would know what inside absolutely horrified Come fel lows wanted nice crate fly no competition just long does exhibit visual errors Now know what scale guys go through documentation begins insidiously builds builds like anvil-head thunderstorm Research becomes game itself fascinating enjoyable tend forget model Research unveiled hobby itself within could enjoy life time hobby uncontrolled documenta tion single design single airplane What license numbers ship building Which varia tion really copying find stringers no knew about nobody shows drawing Longerons shown curved drawing engineer types tell us thats no-nothat steel tube never bowed because its compression strength would shot darn wheeis 7 inches have make supposed fun project So well put Williams biggest6 inches maybe replace later big gest Williams cylinders e Gnome rotary make 7cylinder Warner out Now Fox 78 extension shaft mount ed 8 oclock put its head between dummy cylindersbut head doesnt show anyway have epoxy allergy Murder Now what So some guys tell us fool long enough stuff allergy part game fumes Being editor have big advantage three weeks research would take six months year otherwise Now hung up wing tipsnothing accur ate front view everything dis agreement Sooner later well back track make detailed drawings tail wheel assembly etcwe hope Time becomes meaningless Whereas building always frantic rush get air now feel enjoyment building big deal really dont care youll get done Enjoy step drawings look like road map rural Saudi Arabiavast open Spaces Will live long enough see thing fly cares get field got station wagon cares shop 9 x 12 three six-foot airplanes hang plus bench plus drawing table plus couch usually cat Aristocrat can assembled indoors Now dig guys built Tower Babel Pyramids Eiffel Tower Maybe should have stuck rubberscale guys Join us next Saturday after noon episode 15 Radio Technique/Myers continued page 17 dealing subject called EMI Electro-Magnetic Interference According experts getting rid EMI art science Whatever works right thing other hand flying buddy Nick Ziroli has building flying types models years ranging hA 200-pound RPVs Nick says has never found need chokes set working cor rectly before installed So having trouble likely caused wear tear will yield solutions proposed above Owners Kraft radios can purchase special harness No 200-193 direct factory containing chokes proper size use 22 H highcurrent chokes must specify system harness used cause Kraft has used several types connectors over years several patterns connections might make leads up other brands ask nicely dont know sure worst can happen say no February 1979 issue QST magazine has feature story device called Incon need choke filter Incon looks like good pos sible solution Youll have make own want because isnt production yet above bits information given BOB ABERLE W2QPP Keep letters coming folks Id par ticularly like hear some folks have solved problems George Myers 70 Froehlich Farm Rd Hicksville NY 11801 Waco/Sru II continued page 23 appropriate ribs clothes pins work well slip N struts place Move clips around until nice fit obtained spot glue clips small dab epoxy epoxy sets remove struts secure clips plenty epoxy a rib scabs cowl shown plans simple light strong First build balsa drum like frame Sand outside surface smooth perfect circle Next cut heavy May1979 95 SCALE CLASICS Plans & Construction Manual CuRTiSS HAWK P8E STINSON RELIANT SR8 /eScaleg4eSpan 22W WScaIe 126 Span 25e0 2Scale 83 Span e12 2Scale 84 Span e15 1W Scale 47VeSpan lO L 1WScle 83 Spanl2O CURTISS GOSHAWK Filce 2 Scale 83 Spar 81500 CURTiSS OuLFHAWK lA . 2Scale 63 Span 81800 / Scale 84W Span 53O50 Please Add SISO Fe Ode FosteSe a,d I-ladflfla. OteldeUS Add SSOOMake PaytneOta tO Richard G Barron1213 Hoily Spring Ln Grand Biano MichIgan 48439 Sed 510010 COetelete lflftetloC