Radio Control PYLON RACING Bill Hager WHEN read 1983 Nats will history didnt attend am sure will have missed best racing year just received contest report Stu Richmond RAF Roswell Air Force Races held June 4 5 Orlando FL Roswell Air Force put really great race 15 Quarter Midgets 29 Quickee 500s Saturday morning threatening weather Quickee racing started quiet roar mufliers required mufflers seemed slow planes down about eight 10 seconds heat reduction noise-level certainly apparent hew five #ounds three-byfive matrix end Jimmy Moorhead owned Fast Time First Place weather less ominous Sunday QM fliers end five rounds three-way tie first place perfect scores Ilyoff Buddy Roos finishing first lake Jacob son second Jimmy Bartels third three times could have covered less seconds span re sults times lop Five Quickie 500 I Jim Moorhead 13734 2 Buddy Roos 14320 3 Jimmy Bartels 14348 4 Mike Klutz 13867 5 Trey Farran 14695 6 lake Jacobson 7 Nick Nicklaw 8 Tom Gardenhire 9 Greg Doe 10 Clayton Quarter Midget I Buddy Roos 12908 2 lake Jacobson 12707 3 Jimmy Bartels 13084 4 Tobi Grether 13679 5 Steve Kovach 13564 6 Stu Richmond 7 Rod Gier 8 Gregg Doe 9 West 10 Nick Nicklaw last part series finish ing Pylon Racer last article left walking around Racer patting yourself back calling faniily neighbors see beautiful new plane finished yet final trim decals panel lines such clear coat still come Before start its jime clean again Using alcohol clean whole plane start ing hinge lines Use old tooth brush fine get paint powder out hinge lines Lightly scrub until satisfied clean can get take razor blade piece paper towel over blade run along hinge line should come out no paint powder Now go over rest plane least twice alcohol changing towel often have found dust gets clear coat plane floor Now have plane clean lay out product decals experimentals such feel need panel lines put now use panel lines Ive never seen plane looks better because some districts demand No airplanesto own Dont get crazy product decals Too will make plane look cluttered use five decals plus experimentals seems enough paint scheme Two K&Bs cheek cowls two Airtronics fin Gulf front cockpit Think step out well dont try gild lilly clear coat nextbut until have cleaned plane again Before last cleaning job take air hose blow off whole plane inside out least 60 lb pressure will sur prised much dust junk still hang ing plane Now final coatthe clear have using Ditzler DAU-75 Acrylic Ur ethane have good luck thats what will recommend Mix about 12 oz paint 15 oz DXR-80 Hardener together jar Strain paint through old panty hose best strainer have found stir until bubbles have gassed outabout five minutes should Now get ready paint Use tack rag part painted paint gets much dust off possible Use good quality epoxy-compatible tack rag Note thin clear very thin start 52 Model Aviation Continued page 149 Quarter Midget fliers RAF Races front row L R Stu Richmond Cobra Mike Klutz w/Cobra Trey Farran wlToni Jimmy Bartels w/Rivets Buddy Roos w/Cobra Toby Grether w/Cobra Barry West w/Toni back row L R Greg Doe w/Cobra Rodney Hudlow w/P-51 Forrest Whitson wfCobra Chet Ellis w/Cobra Galen Nick Nicklaw w/Cobra Gall Jocobson w/Pole Kitty Steve Kovach w/Toni Rod Gier /P-51Would say Cobra country Hey did rest Trey Farrans plane go ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONtROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control sales & 5Cr Fa\N/ Authorized Pensacola FL 32503 TiRAFTN7vice JR PRO P0 radioLine equipment imported Circus HobbiesF~i1 Road904/478-6745 recent column reviewed some plans Dick Garmhausen commented flexible wing structure Soon after issue came out got letter Doug expressing approach wing spars An other quote Kingfisher booklet tells main wing spar designed take load 6 Gs neglecting additional strength aft spar webs wing skin have bad luck crash water unlikely wing will break Doug does believe flexible wings floats large main float two tip floats also monocoque structures case theyre built vertical center keels Due some innovative thinking Dougs part job switching landing gear relatively easy Both landing gears rugged true scale have water available think would bard pass up Plans available Douglas V McBrien 24 Truby St Granby MA 01033 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 read about Model Aviation writing advertisers mention RC Pylon Racing/Hager Continued page 52 thinning will guarantee runs Now set spray gun shoot dium mist about 30-35 lb pressure Shoot medium tack-coat clear Dont try wet whole surface just get fairly coat paint Stop wait 15 minutes put good medium coat clear wing shoot bot tom first top fuselage shoot tail forward wheel pants cheek cowl put wooden sticks shot last holding gun least 12 away Just fog paint until get glossy hardest part shooting clear coat knowing stop find self squinting light looking dry places give last squirtstop usually have enough paint will just buy runs Now put gun down walk away plane least half hour Have cup coffee cold drink get away After break come back clean gun look plane paint will dry dust-free half hour dont touch least 12 hours 24 hours would better half hour paint will flow out film over what see way will look completely dry have runs big pieces dust clear coat look they bottom otherwise hard see plane put together sitting ground leave alone can live knowing may blow whole paint job wait about 36 hours after shot clear coat block-sand unacceptable areas old No 600 paper machine-polish good polish like Mothers six-in lambs wool wheel attached electric drill Thats clear coat probably simplest part paint job because last critical feel secrets good clear coat Prepa ration clean plane strain paint have well-built painted plane start 2 Knowing sop good clear coats turned sagging messes saying Just it& tip Now would like backtrack little talk about paint have found sunrise early morning probably a.a NEW * NEW * NEW BUY ECONOPAC & SAVE WACO HKS-7GREAT LAKES TRAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN927OOppPLAN$27OOpp F 0 Cowl$27OOppFG Cowi$27OOpp F G Pants$2500ppECONO PAC649UOpp ECONO-PAC570OOppSAVt$600 SAVE 0Furman Monstiqueplan$17Otpp 0 UBBER STRIP FAI RUBBER Made US SIZES 1/4 3/16 1/8 3/32 1/16 1mm thick042 BOXED 16 ounces rubber per box PRICE$1250 per box ppdin USA California Residents Add 6% Sales Tax KSB TIMERSj FUEL SHUTOFFal-OFF 3OSEC $119 NDT $119tIPIJI SEND 50*FOR 1982/83 CATALOG FAI Model Supply 3957TOR RANG E CA 905 PRODUCTS pa lUff n.rcnbflur h*flt CO Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers * Venturi Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass ance October 1983 149 NOW PRODUCED IN THE US ANOTHER GIANT FROM J-5 tough TORNADO 4 feet speed stability TORNADO loves rough water handling best time paint clear air clean just little damp usually no wind plane has whole day dry before come back fondle After drying day clear coat just about bulletproof Go ahead put radio engine silicone wing saddle fly thing have lots questions about go about fading colors Ill take some time go over color-fading techniques Fading probably easiest way striking paint jobbut can also create total mess painters try fade colors too far away other spectrum come out looking like forgot piece masking tape tf going try fading colors should use shades close another Dark/light same color works best colors next another color wheel Always shoot colors together little drying time possible Always fade lightest color over dark always hold airbrush overspray goes back color spraying Again biggest secret fading know ing quit hope series articles has given some points painting did know before way way paint has successful thanks Gary MePike tips finishing Pylon Racer See next month Bill Hager 706 Glen Haven Dr Conroe TX 77302 RC Helicopters/Jolly Continued page 53 timately land Long Beach Convention Center Model Aviation carried story August 1980 issue might want particulars third picture Master Ernie Huber hovering Kavan Jet Ranger verted audiences past MACS show love watch someone Ernies talent fly gives rest us something shoot know can have lot fun articles participate Unlike other editors may have ended columns saying Please send information can have something present month Ill put slightly different way Id like send pictures information might have something column dont youll have listen month because will have column blank space used So until next time keep landing rotor blades up Larry Jolly 5501 W Como Santa Ana CA 92703 Airplane Design/Powers Continued paoe 55 15 The weight power speed etc Scale model have real relationship weight power speed etc full-scale prototype a True b False 16The equation lift LCLqS a This abstruse formula no practical value b A half-hours study equa tion will give modeler very useful tool use designing own models 17 Swept highly-tapered wings should have a Washout b Washin 18 Reynolds Number has a Size b Speed c Viscosity d Density e Drag 19 In level flight horizontal tail nor mally carries a An up load lift aft portion airplane b A down load keep nose up c No load because stabilizers have zero incidence 20 On full-size airplanes wing set some angle incidence yet models have wing set zero incidence a Therefore incidence neces sary b If both wing stabilizer set zero incidence airplane will fly up elevator Answers Discussion b tail-dragger arrangement herently unstable because main wheels ahead CG Tail wheels skids provide degree stability very effective because very lightly loaded up off ground almost immediately takeoff main wheels should toed-in As shown Fig airplane begins yaw usually left because propeller torque drag left wheel combines greater moment arm does right wheel its smaller arm B thus producing net mo ment tending increase yaw left cause ground loop toeing-in wheels drag left wheel reduced right wheel increased has effect increasing favorable restoring moment right wheel decreasing adverse moment left wheel can seen under no circumstances should main wheels ever toed-out 2bTorque Propeller torque can con siderable low speed loads up left wheel unloads right wheel causing airplane want turn left should countered application right rud der well toe-in mentioned above Ap plication ailerons counter torque takeoff can induce stall snap roll future article 3b no such thing P-factor described difference angle attack between ascending left pro peller blade descending right blade line flight high angles attack near stall same thrust line prop shown Fig 2 As shown Fig 3 propeller spinning moderately fast tends equalize flow pressure across its diameter disparity angle attack between ascending descending blades equal ized small imbalance between lift blade compared other can cause destructive vibration fixed-pitch propeller 150 Model Aviation Mahogany Plywood Boat Kit Designed Industrial Quadra other 2 cycle engines S 1795 KIT & DRIVE TRAIN $14950 Super offshore Deep V KIT DRIVE TRAIN & ENGINE $26950 Shipping charges included US Canada J- S ENTERPRISES 256 Schuman Dr Newmarket Alabama 35761 Phone 1 -205-852-2566 PO Box 82 Belmont Ontario NOL i Ba Phone 151 9-644-0375 FULL5iZE PLANS Heliboy looking real hard 30 miles open water between sit ting Catalina Island will ul
Edition: Model Aviation - 1983/10
Page Numbers: 52, 149, 150
Radio Control PYLON RACING Bill Hager WHEN read 1983 Nats will history didnt attend am sure will have missed best racing year just received contest report Stu Richmond RAF Roswell Air Force Races held June 4 5 Orlando FL Roswell Air Force put really great race 15 Quarter Midgets 29 Quickee 500s Saturday morning threatening weather Quickee racing started quiet roar mufliers required mufflers seemed slow planes down about eight 10 seconds heat reduction noise-level certainly apparent hew five #ounds three-byfive matrix end Jimmy Moorhead owned Fast Time First Place weather less ominous Sunday QM fliers end five rounds three-way tie first place perfect scores Ilyoff Buddy Roos finishing first lake Jacob son second Jimmy Bartels third three times could have covered less seconds span re sults times lop Five Quickie 500 I Jim Moorhead 13734 2 Buddy Roos 14320 3 Jimmy Bartels 14348 4 Mike Klutz 13867 5 Trey Farran 14695 6 lake Jacobson 7 Nick Nicklaw 8 Tom Gardenhire 9 Greg Doe 10 Clayton Quarter Midget I Buddy Roos 12908 2 lake Jacobson 12707 3 Jimmy Bartels 13084 4 Tobi Grether 13679 5 Steve Kovach 13564 6 Stu Richmond 7 Rod Gier 8 Gregg Doe 9 West 10 Nick Nicklaw last part series finish ing Pylon Racer last article left walking around Racer patting yourself back calling faniily neighbors see beautiful new plane finished yet final trim decals panel lines such clear coat still come Before start its jime clean again Using alcohol clean whole plane start ing hinge lines Use old tooth brush fine get paint powder out hinge lines Lightly scrub until satisfied clean can get take razor blade piece paper towel over blade run along hinge line should come out no paint powder Now go over rest plane least twice alcohol changing towel often have found dust gets clear coat plane floor Now have plane clean lay out product decals experimentals such feel need panel lines put now use panel lines Ive never seen plane looks better because some districts demand No airplanesto own Dont get crazy product decals Too will make plane look cluttered use five decals plus experimentals seems enough paint scheme Two K&Bs cheek cowls two Airtronics fin Gulf front cockpit Think step out well dont try gild lilly clear coat nextbut until have cleaned plane again Before last cleaning job take air hose blow off whole plane inside out least 60 lb pressure will sur prised much dust junk still hang ing plane Now final coatthe clear have using Ditzler DAU-75 Acrylic Ur ethane have good luck thats what will recommend Mix about 12 oz paint 15 oz DXR-80 Hardener together jar Strain paint through old panty hose best strainer have found stir until bubbles have gassed outabout five minutes should Now get ready paint Use tack rag part painted paint gets much dust off possible Use good quality epoxy-compatible tack rag Note thin clear very thin start 52 Model Aviation Continued page 149 Quarter Midget fliers RAF Races front row L R Stu Richmond Cobra Mike Klutz w/Cobra Trey Farran wlToni Jimmy Bartels w/Rivets Buddy Roos w/Cobra Toby Grether w/Cobra Barry West w/Toni back row L R Greg Doe w/Cobra Rodney Hudlow w/P-51 Forrest Whitson wfCobra Chet Ellis w/Cobra Galen Nick Nicklaw w/Cobra Gall Jocobson w/Pole Kitty Steve Kovach w/Toni Rod Gier /P-51Would say Cobra country Hey did rest Trey Farrans plane go ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONtROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control sales & 5Cr Fa\N/ Authorized Pensacola FL 32503 TiRAFTN7vice JR PRO P0 radioLine equipment imported Circus HobbiesF~i1 Road904/478-6745 recent column reviewed some plans Dick Garmhausen commented flexible wing structure Soon after issue came out got letter Doug expressing approach wing spars An other quote Kingfisher booklet tells main wing spar designed take load 6 Gs neglecting additional strength aft spar webs wing skin have bad luck crash water unlikely wing will break Doug does believe flexible wings floats large main float two tip floats also monocoque structures case theyre built vertical center keels Due some innovative thinking Dougs part job switching landing gear relatively easy Both landing gears rugged true scale have water available think would bard pass up Plans available Douglas V McBrien 24 Truby St Granby MA 01033 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 read about Model Aviation writing advertisers mention RC Pylon Racing/Hager Continued page 52 thinning will guarantee runs Now set spray gun shoot dium mist about 30-35 lb pressure Shoot medium tack-coat clear Dont try wet whole surface just get fairly coat paint Stop wait 15 minutes put good medium coat clear wing shoot bot tom first top fuselage shoot tail forward wheel pants cheek cowl put wooden sticks shot last holding gun least 12 away Just fog paint until get glossy hardest part shooting clear coat knowing stop find self squinting light looking dry places give last squirtstop usually have enough paint will just buy runs Now put gun down walk away plane least half hour Have cup coffee cold drink get away After break come back clean gun look plane paint will dry dust-free half hour dont touch least 12 hours 24 hours would better half hour paint will flow out film over what see way will look completely dry have runs big pieces dust clear coat look they bottom otherwise hard see plane put together sitting ground leave alone can live knowing may blow whole paint job wait about 36 hours after shot clear coat block-sand unacceptable areas old No 600 paper machine-polish good polish like Mothers six-in lambs wool wheel attached electric drill Thats clear coat probably simplest part paint job because last critical feel secrets good clear coat Prepa ration clean plane strain paint have well-built painted plane start 2 Knowing sop good clear coats turned sagging messes saying Just it& tip Now would like backtrack little talk about paint have found sunrise early morning probably a.a NEW * NEW * NEW BUY ECONOPAC & SAVE WACO HKS-7GREAT LAKES TRAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN927OOppPLAN$27OOpp F 0 Cowl$27OOppFG Cowi$27OOpp F G Pants$2500ppECONO PAC649UOpp ECONO-PAC570OOppSAVt$600 SAVE 0Furman Monstiqueplan$17Otpp 0 UBBER STRIP FAI RUBBER Made US SIZES 1/4 3/16 1/8 3/32 1/16 1mm thick042 BOXED 16 ounces rubber per box PRICE$1250 per box ppdin USA California Residents Add 6% Sales Tax KSB TIMERSj FUEL SHUTOFFal-OFF 3OSEC $119 NDT $119tIPIJI SEND 50*FOR 1982/83 CATALOG FAI Model Supply 3957TOR RANG E CA 905 PRODUCTS pa lUff n.rcnbflur h*flt CO Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers * Venturi Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass ance October 1983 149 NOW PRODUCED IN THE US ANOTHER GIANT FROM J-5 tough TORNADO 4 feet speed stability TORNADO loves rough water handling best time paint clear air clean just little damp usually no wind plane has whole day dry before come back fondle After drying day clear coat just about bulletproof Go ahead put radio engine silicone wing saddle fly thing have lots questions about go about fading colors Ill take some time go over color-fading techniques Fading probably easiest way striking paint jobbut can also create total mess painters try fade colors too far away other spectrum come out looking like forgot piece masking tape tf going try fading colors should use shades close another Dark/light same color works best colors next another color wheel Always shoot colors together little drying time possible Always fade lightest color over dark always hold airbrush overspray goes back color spraying Again biggest secret fading know ing quit hope series articles has given some points painting did know before way way paint has successful thanks Gary MePike tips finishing Pylon Racer See next month Bill Hager 706 Glen Haven Dr Conroe TX 77302 RC Helicopters/Jolly Continued page 53 timately land Long Beach Convention Center Model Aviation carried story August 1980 issue might want particulars third picture Master Ernie Huber hovering Kavan Jet Ranger verted audiences past MACS show love watch someone Ernies talent fly gives rest us something shoot know can have lot fun articles participate Unlike other editors may have ended columns saying Please send information can have something present month Ill put slightly different way Id like send pictures information might have something column dont youll have listen month because will have column blank space used So until next time keep landing rotor blades up Larry Jolly 5501 W Como Santa Ana CA 92703 Airplane Design/Powers Continued paoe 55 15 The weight power speed etc Scale model have real relationship weight power speed etc full-scale prototype a True b False 16The equation lift LCLqS a This abstruse formula no practical value b A half-hours study equa tion will give modeler very useful tool use designing own models 17 Swept highly-tapered wings should have a Washout b Washin 18 Reynolds Number has a Size b Speed c Viscosity d Density e Drag 19 In level flight horizontal tail nor mally carries a An up load lift aft portion airplane b A down load keep nose up c No load because stabilizers have zero incidence 20 On full-size airplanes wing set some angle incidence yet models have wing set zero incidence a Therefore incidence neces sary b If both wing stabilizer set zero incidence airplane will fly up elevator Answers Discussion b tail-dragger arrangement herently unstable because main wheels ahead CG Tail wheels skids provide degree stability very effective because very lightly loaded up off ground almost immediately takeoff main wheels should toed-in As shown Fig airplane begins yaw usually left because propeller torque drag left wheel combines greater moment arm does right wheel its smaller arm B thus producing net mo ment tending increase yaw left cause ground loop toeing-in wheels drag left wheel reduced right wheel increased has effect increasing favorable restoring moment right wheel decreasing adverse moment left wheel can seen under no circumstances should main wheels ever toed-out 2bTorque Propeller torque can con siderable low speed loads up left wheel unloads right wheel causing airplane want turn left should countered application right rud der well toe-in mentioned above Ap plication ailerons counter torque takeoff can induce stall snap roll future article 3b no such thing P-factor described difference angle attack between ascending left pro peller blade descending right blade line flight high angles attack near stall same thrust line prop shown Fig 2 As shown Fig 3 propeller spinning moderately fast tends equalize flow pressure across its diameter disparity angle attack between ascending descending blades equal ized small imbalance between lift blade compared other can cause destructive vibration fixed-pitch propeller 150 Model Aviation Mahogany Plywood Boat Kit Designed Industrial Quadra other 2 cycle engines S 1795 KIT & DRIVE TRAIN $14950 Super offshore Deep V KIT DRIVE TRAIN & ENGINE $26950 Shipping charges included US Canada J- S ENTERPRISES 256 Schuman Dr Newmarket Alabama 35761 Phone 1 -205-852-2566 PO Box 82 Belmont Ontario NOL i Ba Phone 151 9-644-0375 FULL5iZE PLANS Heliboy looking real hard 30 miles open water between sit ting Catalina Island will ul
Edition: Model Aviation - 1983/10
Page Numbers: 52, 149, 150
Radio Control PYLON RACING Bill Hager WHEN read 1983 Nats will history didnt attend am sure will have missed best racing year just received contest report Stu Richmond RAF Roswell Air Force Races held June 4 5 Orlando FL Roswell Air Force put really great race 15 Quarter Midgets 29 Quickee 500s Saturday morning threatening weather Quickee racing started quiet roar mufliers required mufflers seemed slow planes down about eight 10 seconds heat reduction noise-level certainly apparent hew five #ounds three-byfive matrix end Jimmy Moorhead owned Fast Time First Place weather less ominous Sunday QM fliers end five rounds three-way tie first place perfect scores Ilyoff Buddy Roos finishing first lake Jacob son second Jimmy Bartels third three times could have covered less seconds span re sults times lop Five Quickie 500 I Jim Moorhead 13734 2 Buddy Roos 14320 3 Jimmy Bartels 14348 4 Mike Klutz 13867 5 Trey Farran 14695 6 lake Jacobson 7 Nick Nicklaw 8 Tom Gardenhire 9 Greg Doe 10 Clayton Quarter Midget I Buddy Roos 12908 2 lake Jacobson 12707 3 Jimmy Bartels 13084 4 Tobi Grether 13679 5 Steve Kovach 13564 6 Stu Richmond 7 Rod Gier 8 Gregg Doe 9 West 10 Nick Nicklaw last part series finish ing Pylon Racer last article left walking around Racer patting yourself back calling faniily neighbors see beautiful new plane finished yet final trim decals panel lines such clear coat still come Before start its jime clean again Using alcohol clean whole plane start ing hinge lines Use old tooth brush fine get paint powder out hinge lines Lightly scrub until satisfied clean can get take razor blade piece paper towel over blade run along hinge line should come out no paint powder Now go over rest plane least twice alcohol changing towel often have found dust gets clear coat plane floor Now have plane clean lay out product decals experimentals such feel need panel lines put now use panel lines Ive never seen plane looks better because some districts demand No airplanesto own Dont get crazy product decals Too will make plane look cluttered use five decals plus experimentals seems enough paint scheme Two K&Bs cheek cowls two Airtronics fin Gulf front cockpit Think step out well dont try gild lilly clear coat nextbut until have cleaned plane again Before last cleaning job take air hose blow off whole plane inside out least 60 lb pressure will sur prised much dust junk still hang ing plane Now final coatthe clear have using Ditzler DAU-75 Acrylic Ur ethane have good luck thats what will recommend Mix about 12 oz paint 15 oz DXR-80 Hardener together jar Strain paint through old panty hose best strainer have found stir until bubbles have gassed outabout five minutes should Now get ready paint Use tack rag part painted paint gets much dust off possible Use good quality epoxy-compatible tack rag Note thin clear very thin start 52 Model Aviation Continued page 149 Quarter Midget fliers RAF Races front row L R Stu Richmond Cobra Mike Klutz w/Cobra Trey Farran wlToni Jimmy Bartels w/Rivets Buddy Roos w/Cobra Toby Grether w/Cobra Barry West w/Toni back row L R Greg Doe w/Cobra Rodney Hudlow w/P-51 Forrest Whitson wfCobra Chet Ellis w/Cobra Galen Nick Nicklaw w/Cobra Gall Jocobson w/Pole Kitty Steve Kovach w/Toni Rod Gier /P-51Would say Cobra country Hey did rest Trey Farrans plane go ILGAIN Losing control can night mare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience CONtROl modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical inhouse radio service can depend Radio South customer satisfaction isnt just motto Its way life Let us put back control sales & 5Cr Fa\N/ Authorized Pensacola FL 32503 TiRAFTN7vice JR PRO P0 radioLine equipment imported Circus HobbiesF~i1 Road904/478-6745 recent column reviewed some plans Dick Garmhausen commented flexible wing structure Soon after issue came out got letter Doug expressing approach wing spars An other quote Kingfisher booklet tells main wing spar designed take load 6 Gs neglecting additional strength aft spar webs wing skin have bad luck crash water unlikely wing will break Doug does believe flexible wings floats large main float two tip floats also monocoque structures case theyre built vertical center keels Due some innovative thinking Dougs part job switching landing gear relatively easy Both landing gears rugged true scale have water available think would bard pass up Plans available Douglas V McBrien 24 Truby St Granby MA 01033 Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 read about Model Aviation writing advertisers mention RC Pylon Racing/Hager Continued page 52 thinning will guarantee runs Now set spray gun shoot dium mist about 30-35 lb pressure Shoot medium tack-coat clear Dont try wet whole surface just get fairly coat paint Stop wait 15 minutes put good medium coat clear wing shoot bot tom first top fuselage shoot tail forward wheel pants cheek cowl put wooden sticks shot last holding gun least 12 away Just fog paint until get glossy hardest part shooting clear coat knowing stop find self squinting light looking dry places give last squirtstop usually have enough paint will just buy runs Now put gun down walk away plane least half hour Have cup coffee cold drink get away After break come back clean gun look plane paint will dry dust-free half hour dont touch least 12 hours 24 hours would better half hour paint will flow out film over what see way will look completely dry have runs big pieces dust clear coat look they bottom otherwise hard see plane put together sitting ground leave alone can live knowing may blow whole paint job wait about 36 hours after shot clear coat block-sand unacceptable areas old No 600 paper machine-polish good polish like Mothers six-in lambs wool wheel attached electric drill Thats clear coat probably simplest part paint job because last critical feel secrets good clear coat Prepa ration clean plane strain paint have well-built painted plane start 2 Knowing sop good clear coats turned sagging messes saying Just it& tip Now would like backtrack little talk about paint have found sunrise early morning probably a.a NEW * NEW * NEW BUY ECONOPAC & SAVE WACO HKS-7GREAT LAKES TRAINER GREAT LAKES SPECIAL2T1A/2T1E PLAN927OOppPLAN$27OOpp F 0 Cowl$27OOppFG Cowi$27OOpp F G Pants$2500ppECONO PAC649UOpp ECONO-PAC570OOppSAVt$600 SAVE 0Furman Monstiqueplan$17Otpp 0 UBBER STRIP FAI RUBBER Made US SIZES 1/4 3/16 1/8 3/32 1/16 1mm thick042 BOXED 16 ounces rubber per box PRICE$1250 per box ppdin USA California Residents Add 6% Sales Tax KSB TIMERSj FUEL SHUTOFFal-OFF 3OSEC $119 NDT $119tIPIJI SEND 50*FOR 1982/83 CATALOG FAI Model Supply 3957TOR RANG E CA 905 PRODUCTS pa lUff n.rcnbflur h*flt CO Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers * Venturi Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass ance October 1983 149 NOW PRODUCED IN THE US ANOTHER GIANT FROM J-5 tough TORNADO 4 feet speed stability TORNADO loves rough water handling best time paint clear air clean just little damp usually no wind plane has whole day dry before come back fondle After drying day clear coat just about bulletproof Go ahead put radio engine silicone wing saddle fly thing have lots questions about go about fading colors Ill take some time go over color-fading techniques Fading probably easiest way striking paint jobbut can also create total mess painters try fade colors too far away other spectrum come out looking like forgot piece masking tape tf going try fading colors should use shades close another Dark/light same color works best colors next another color wheel Always shoot colors together little drying time possible Always fade lightest color over dark always hold airbrush overspray goes back color spraying Again biggest secret fading know ing quit hope series articles has given some points painting did know before way way paint has successful thanks Gary MePike tips finishing Pylon Racer See next month Bill Hager 706 Glen Haven Dr Conroe TX 77302 RC Helicopters/Jolly Continued page 53 timately land Long Beach Convention Center Model Aviation carried story August 1980 issue might want particulars third picture Master Ernie Huber hovering Kavan Jet Ranger verted audiences past MACS show love watch someone Ernies talent fly gives rest us something shoot know can have lot fun articles participate Unlike other editors may have ended columns saying Please send information can have something present month Ill put slightly different way Id like send pictures information might have something column dont youll have listen month because will have column blank space used So until next time keep landing rotor blades up Larry Jolly 5501 W Como Santa Ana CA 92703 Airplane Design/Powers Continued paoe 55 15 The weight power speed etc Scale model have real relationship weight power speed etc full-scale prototype a True b False 16The equation lift LCLqS a This abstruse formula no practical value b A half-hours study equa tion will give modeler very useful tool use designing own models 17 Swept highly-tapered wings should have a Washout b Washin 18 Reynolds Number has a Size b Speed c Viscosity d Density e Drag 19 In level flight horizontal tail nor mally carries a An up load lift aft portion airplane b A down load keep nose up c No load because stabilizers have zero incidence 20 On full-size airplanes wing set some angle incidence yet models have wing set zero incidence a Therefore incidence neces sary b If both wing stabilizer set zero incidence airplane will fly up elevator Answers Discussion b tail-dragger arrangement herently unstable because main wheels ahead CG Tail wheels skids provide degree stability very effective because very lightly loaded up off ground almost immediately takeoff main wheels should toed-in As shown Fig airplane begins yaw usually left because propeller torque drag left wheel combines greater moment arm does right wheel its smaller arm B thus producing net mo ment tending increase yaw left cause ground loop toeing-in wheels drag left wheel reduced right wheel increased has effect increasing favorable restoring moment right wheel decreasing adverse moment left wheel can seen under no circumstances should main wheels ever toed-out 2bTorque Propeller torque can con siderable low speed loads up left wheel unloads right wheel causing airplane want turn left should countered application right rud der well toe-in mentioned above Ap plication ailerons counter torque takeoff can induce stall snap roll future article 3b no such thing P-factor described difference angle attack between ascending left pro peller blade descending right blade line flight high angles attack near stall same thrust line prop shown Fig 2 As shown Fig 3 propeller spinning moderately fast tends equalize flow pressure across its diameter disparity angle attack between ascending descending blades equal ized small imbalance between lift blade compared other can cause destructive vibration fixed-pitch propeller 150 Model Aviation Mahogany Plywood Boat Kit Designed Industrial Quadra other 2 cycle engines S 1795 KIT & DRIVE TRAIN $14950 Super offshore Deep V KIT DRIVE TRAIN & ENGINE $26950 Shipping charges included US Canada J- S ENTERPRISES 256 Schuman Dr Newmarket Alabama 35761 Phone 1 -205-852-2566 PO Box 82 Belmont Ontario NOL i Ba Phone 151 9-644-0375 FULL5iZE PLANS Heliboy looking real hard 30 miles open water between sit ting Catalina Island will ul