C SCALE Bob & Dolly Wischer HELPFUL hint Art Johnson Flyer newsletter Floridas Gold Coast Radio Con trollers comes hint Robart Universal Scale wheels closer others looking right military type scale planes However us hot climates have found tire gets flat rather quickly hot runway tire gets soft enough cut impact hard landing tried beefing up tires silicone mixture silicone micro balloons helped also distorted tire shape over period time Recently hit tech nique really works Just cut off bead old Robart tire size smaller model Stuff resulting inner-tubetype cap tire will have double layer tire will stand up very well resist cuts impact modification also lighter other techniques used beef up Robart wheels Another method stuffing tires cut doughnut sponge rubber has rather dense consistency Cut slightly oversize will job perfectly shaped time Robart used foam rubber inserts high load applications have heard no longer produced Hinges Control surface hinges scale models simulate action appearance found prototype must often made scratch modeler com mercial hinges high quality usefulness available relatively inexpensive just dont look like hinges used full scale aircraft either appearance operation point scale modeler separates thinking modeling practices closer observation distinctive detail found control surfaces real thing deeply slotted rudder elevator Douglas Boeing indicates presence hinge point far behind leading edge balanc ing area ahead hinge point extends Out air stream whenever surface deflected model depending size hinge line may much 1 rearward surface leading edge Beginning earliest applications Friese type ailerons planes have surfaces hinged along line near aileron lower surface some distance aft leading edge type hinge visible becomes scale feature gives model realistic character Tail surface hinges extend slots elevators rudder can made hinge posts plywood cemented holes stabilizer spars elevators rounded leading edge balsa block has its rear surface grooved full length snugly fit 3/32 diameter aluminum tube grooved surface later cemented elevator spar forming long thin box contain tube Slots cut through block width spacing match hinge posts have drilled running fit tube two hinge posts used elevator must held alignment inserting tube through holes epoxy hardens wind up wooden bearings effective long wearing airplane completely finished tube inserted elevator tip access hole filled painted Cost price aluminum tube little effort scale-like hinge Unlike elevators top surface ailerons usually smooth slots bottom Scale aileron flap hinges assembled similar manner except pin groove cut leading edge block near lower surface block shaped radius centered hinge pin planes complete hinge exposed below wing surface posts can made plywood aluminum sheet brass tube depending appearance desired exposed hinges greatest realism use hexagon head screw nut hinge 32 Model Aviation Unusual finish Willard Dedels deHavilland Chipmunk enamel over Super Coverite Glaskote fuel proofing Plane spans 103 weighs 185 lbs uses OS 90 engine Grumman F4F Wildcat built John Sullivan Louisiana Scale Squadron Partially completed P-38 background Photo Landry flight line Kitchener-Waterloo gathering Stars club Olean NYwaswell-represented Portion large spectatorcrowd background Kitchener-Waterloo few Fleet Trainers seen Built Concept Models kits popular plane Tiny scale screws available hobby shops Sig catalog Accurately locating hinge lines model also has considerable effect flight characteristics Friese type ailerons intended prevent adverse yaw turn inducing drag raised aileron because its nose dips below wing lower surface balances drag lowered aileron Air flowing through slot lower upper surface makes raised aileron effective Without feature tendency plane banked direction swing its tail same direction opposite what desired get smoothly coordinated turn rudder must used excessively prevent adverse tail swing Friese type ailerons need rudder coordination aileron minimized Flight model becomes realistic requires less effort transmitter Sopwith 1 /2 Strutter needs use rudder coordination ailerons smooth scale-like turns uses standard model hinges top aileron surface Several years ago during visit Paris Air Museum able inspect full scale plane surprised see its ailerons hinged bottom surface gap top veteran pilot has flown early types informed us ailerons lose effectiveness arrangement Obviously times better make scale errors favor better flying often wonder what control changes would occur model converted non-scale Friese type ailerons Flight realism again March 80 column asked opinions subject flight realism pertains contest activity received number answers some tirades against rules rule makers officials judges latter answers must taken proverbial grain salt coming persons dont recognize friends workers contests spend time energy money contestants can play Make no mistake fly contests participat ing personal enjoyment otherwise known playtime hard working organizers officials judges must considered serious modeler respected friends Except winners almost contestants tend lay blame low scores everyone themselves speak personal experi ence respect having times received what considered unjustly low marks pays resilient Rather complain attempt change rules build models adapt flying techniques conform existing rules disagreeable philosophy seems have worked letter came Dale Johnston has opportunity observe trends scale flying outside US Realism takes important role everywhere Read am pleased about article flight realism March MA am writing before finish magazine have minimal success trying convince fellow scale modelers home area Virginia what scale speed should Most agree should slower pattern flying almost agree should reduced same scale model modelers full scale pilots As point out article truly scale speed very difficult achieve maintain should scale modelers objective During relatively short time hobby have observed British have better appreciation flight realism achieve US can first remember being impressed Brit flying Fokker DR 1974 Aerolympics LakeContinued page 108 LETTERS TO HOT STUFF Hi Guys heres COBRA goes 230 mph quite twice span 9 ft -scale CUB goes about 30 mph Canopy fixtures set SUPER T fairing around landing gear wing attach canopy self cracked during final fitting stop-drilled filled crack SUPER T its stronger before dash palckard HOT STUFFED also nut plates pants set HOT STUFF prior riviting entire CUB HOT STUFFED holds together great through snap maneuvers COBRA rivited except mentioned above Stop get chance Id like see 1/4-scale HOT STUFF BIPE fly Thanks SUPER T really works great HOT STUFF & SUPER T SUPER ADHESIVES AVAILABLE IN 1/4 1/2 AND 2 OZ ALWAYS AT YOUR HOBBY DEALERS FULL-SIZE STRENGTH WHATEVER SCALE YOU BUILD 0t4 PO BOX 836 SIMI VALLEY CA 93065 E 805 522-0062 July 1980 33 Rudderdetailon Bobs new DouglasA-20 model Scale rudder hinges require deep slots lead ing edge Plywood hinge posts extend slots fin spar Note aluminum tube hinge pin protruding top rudder column COBRA OWNED AND RACED BY AL KRAMER SAN-VAL FLYING SERVICE VAN NUYS CALIFORNIA Winning Ideas FOURMOST RETRACTABLE VTOW HOOK RELEASE Price $575 Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE 250 40 AIRFLO ENGINE MOUNT IDEAL FOR QIJICKY 500 PRICE 525 RC TECHNIQUES/MYERS continued page 21 between 600 micro-amps 15 ma Q What happens system PlC 5000 fails integrated circuit meter base may fail open short open no change short internal diode will blow open less second Q What effect does temperature have unit No significant calibration change range 0 150 degrees F Q Is ultimate battery management system No cant handle quick-charging plc sooo wont pick up fact cell has short-circuited since last charging need expanded-scale voltmeter things tools used intelligence understanding PlC 5000 allows make measurement couldnt make before servo demand flight Q Whats difference between PlC 5000 transmitter receiver No difference PlC 5000 accepts voltages 35 18 VDC personal standards column require use thoroughly understand product before writing about and/or recommending case system flu gave DEPENDABLE Friend CIL Launching week spare time spend testing As result some discrepancies found manufacturer has corrected production models feel have contributed bit development products also feel know well enough say confidence conservatively-designed units work right cant find way can hurt Some readers have complained need footnotes understand what Im talking about technology has its jargon outside technology cant expected know what special words mean Therefore will time time print few definitions end column Heres first installment ma - milliamperes Electrical current flows rate measured Amperes Electronic circuits use such tiny flows convenience measuring use units 1/1000 large called milli 1/1000th amperes VDC Volts Direct Current pressure causes electrical current flow measured Volts Batteries provide push push direction years ago people decided call battery current Direct Current still diode device allows current flow direction can think electrical check-valve wish case PlC 5000 check-valve used tiny instead blocking incorrect current resulting short circuit melts down like fuse completely disconnecting circuit Thats enough month Keep letters flowing folks George Myers 70 Froehlich Farm Road Hicks ville NY 11801 RC SCALE/WISCHERS continued page 33 hurst New Jersey past summer fascinated performance Peter French Zlin 526 British Nats So much purchased kit have flying Saudi Arabia has wing span 86 does aerobatics powered 60 engine because weighs 8 2 Ibs no US kits market can compare British National Sport Scale event won Grumman Skyrocket five foot wingspan powered two OS Max 20s scale speed model should move across sky same speed its real counterpart appears moving far enough away appear same size Said another way model its real counterpart correct distances viewer appear same size should also covering same angular distance same amount time should wait until national-level competition impose flight realism would have time standards estab lished explained AMA rule book dont see increasing permissible engine size competition will encourage modelers built light As has previously discussed column no question planes low wing loadings can made operate scale speeds questionable however whether would find desirable since cant control wind velocity air density Reynolds numbers best can hope achieve illusion scale speed argument has going since started writing column 1980 AMA rule book will contain ajudges guide should helpful establishing realism speed related Bob andDolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC TOLEDO/BECKMAN continued page 11 addition 11-member Board Repre sentatives selected board includes members throughout US Cana da member France Due time space limitations its im possible cover everything see Toledo year Ill adding re ports regular column over next few months omissions certain ly intentional readers conve nience addresses suppliers ganizations mentioned follow Aero Plan 101 SW 2nd St Pompano Beach FL 33060 Balsa USA PO Box 164 Marinette WI 54143 Barrons Scale Classics 1213 Holly Spring Lane Grand Blanc Ml 48439 Bob Dively Model Aircraft Inc 28001 Cha grin Blvd Woodmere OH 44122 108 Model Aviation Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gapless Hinges Gapless Hinge Slotter Strut Fairings Cockpit Coeming FUR~ST Send SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 AUDIO FLIGHT TIMER Prevents dead-stick landinas Generates incremental audio timing signals Ideal timing pattern flights giiaers Doass etc case less battery $2495 shipping Less case mounts transmitter $2195 shipping Write free brochure Industrial Inventions Inc RD2 463 US Route 1 Monmouth Jct New Jersey 08852 dont need cali friend time want get Control Line model air new remote release SAFE bC iauncher Strong Safe Ready4ogo anytime STRONG Safety pull-tested 125 lbs pressure strong enough iargest C/L airplanes SAFE Nasa built-in lock prevent accidental release IF NOT AT YOUR DEALER R DIRECT $5300sT CLAIR MODEL COMPONENTS P0 Box 5626 PP ndieUSAEugene OR 97405
Edition: Model Aviation - 1980/07
Page Numbers: 32, 33, 108
C SCALE Bob & Dolly Wischer HELPFUL hint Art Johnson Flyer newsletter Floridas Gold Coast Radio Con trollers comes hint Robart Universal Scale wheels closer others looking right military type scale planes However us hot climates have found tire gets flat rather quickly hot runway tire gets soft enough cut impact hard landing tried beefing up tires silicone mixture silicone micro balloons helped also distorted tire shape over period time Recently hit tech nique really works Just cut off bead old Robart tire size smaller model Stuff resulting inner-tubetype cap tire will have double layer tire will stand up very well resist cuts impact modification also lighter other techniques used beef up Robart wheels Another method stuffing tires cut doughnut sponge rubber has rather dense consistency Cut slightly oversize will job perfectly shaped time Robart used foam rubber inserts high load applications have heard no longer produced Hinges Control surface hinges scale models simulate action appearance found prototype must often made scratch modeler com mercial hinges high quality usefulness available relatively inexpensive just dont look like hinges used full scale aircraft either appearance operation point scale modeler separates thinking modeling practices closer observation distinctive detail found control surfaces real thing deeply slotted rudder elevator Douglas Boeing indicates presence hinge point far behind leading edge balanc ing area ahead hinge point extends Out air stream whenever surface deflected model depending size hinge line may much 1 rearward surface leading edge Beginning earliest applications Friese type ailerons planes have surfaces hinged along line near aileron lower surface some distance aft leading edge type hinge visible becomes scale feature gives model realistic character Tail surface hinges extend slots elevators rudder can made hinge posts plywood cemented holes stabilizer spars elevators rounded leading edge balsa block has its rear surface grooved full length snugly fit 3/32 diameter aluminum tube grooved surface later cemented elevator spar forming long thin box contain tube Slots cut through block width spacing match hinge posts have drilled running fit tube two hinge posts used elevator must held alignment inserting tube through holes epoxy hardens wind up wooden bearings effective long wearing airplane completely finished tube inserted elevator tip access hole filled painted Cost price aluminum tube little effort scale-like hinge Unlike elevators top surface ailerons usually smooth slots bottom Scale aileron flap hinges assembled similar manner except pin groove cut leading edge block near lower surface block shaped radius centered hinge pin planes complete hinge exposed below wing surface posts can made plywood aluminum sheet brass tube depending appearance desired exposed hinges greatest realism use hexagon head screw nut hinge 32 Model Aviation Unusual finish Willard Dedels deHavilland Chipmunk enamel over Super Coverite Glaskote fuel proofing Plane spans 103 weighs 185 lbs uses OS 90 engine Grumman F4F Wildcat built John Sullivan Louisiana Scale Squadron Partially completed P-38 background Photo Landry flight line Kitchener-Waterloo gathering Stars club Olean NYwaswell-represented Portion large spectatorcrowd background Kitchener-Waterloo few Fleet Trainers seen Built Concept Models kits popular plane Tiny scale screws available hobby shops Sig catalog Accurately locating hinge lines model also has considerable effect flight characteristics Friese type ailerons intended prevent adverse yaw turn inducing drag raised aileron because its nose dips below wing lower surface balances drag lowered aileron Air flowing through slot lower upper surface makes raised aileron effective Without feature tendency plane banked direction swing its tail same direction opposite what desired get smoothly coordinated turn rudder must used excessively prevent adverse tail swing Friese type ailerons need rudder coordination aileron minimized Flight model becomes realistic requires less effort transmitter Sopwith 1 /2 Strutter needs use rudder coordination ailerons smooth scale-like turns uses standard model hinges top aileron surface Several years ago during visit Paris Air Museum able inspect full scale plane surprised see its ailerons hinged bottom surface gap top veteran pilot has flown early types informed us ailerons lose effectiveness arrangement Obviously times better make scale errors favor better flying often wonder what control changes would occur model converted non-scale Friese type ailerons Flight realism again March 80 column asked opinions subject flight realism pertains contest activity received number answers some tirades against rules rule makers officials judges latter answers must taken proverbial grain salt coming persons dont recognize friends workers contests spend time energy money contestants can play Make no mistake fly contests participat ing personal enjoyment otherwise known playtime hard working organizers officials judges must considered serious modeler respected friends Except winners almost contestants tend lay blame low scores everyone themselves speak personal experi ence respect having times received what considered unjustly low marks pays resilient Rather complain attempt change rules build models adapt flying techniques conform existing rules disagreeable philosophy seems have worked letter came Dale Johnston has opportunity observe trends scale flying outside US Realism takes important role everywhere Read am pleased about article flight realism March MA am writing before finish magazine have minimal success trying convince fellow scale modelers home area Virginia what scale speed should Most agree should slower pattern flying almost agree should reduced same scale model modelers full scale pilots As point out article truly scale speed very difficult achieve maintain should scale modelers objective During relatively short time hobby have observed British have better appreciation flight realism achieve US can first remember being impressed Brit flying Fokker DR 1974 Aerolympics LakeContinued page 108 LETTERS TO HOT STUFF Hi Guys heres COBRA goes 230 mph quite twice span 9 ft -scale CUB goes about 30 mph Canopy fixtures set SUPER T fairing around landing gear wing attach canopy self cracked during final fitting stop-drilled filled crack SUPER T its stronger before dash palckard HOT STUFFED also nut plates pants set HOT STUFF prior riviting entire CUB HOT STUFFED holds together great through snap maneuvers COBRA rivited except mentioned above Stop get chance Id like see 1/4-scale HOT STUFF BIPE fly Thanks SUPER T really works great HOT STUFF & SUPER T SUPER ADHESIVES AVAILABLE IN 1/4 1/2 AND 2 OZ ALWAYS AT YOUR HOBBY DEALERS FULL-SIZE STRENGTH WHATEVER SCALE YOU BUILD 0t4 PO BOX 836 SIMI VALLEY CA 93065 E 805 522-0062 July 1980 33 Rudderdetailon Bobs new DouglasA-20 model Scale rudder hinges require deep slots lead ing edge Plywood hinge posts extend slots fin spar Note aluminum tube hinge pin protruding top rudder column COBRA OWNED AND RACED BY AL KRAMER SAN-VAL FLYING SERVICE VAN NUYS CALIFORNIA Winning Ideas FOURMOST RETRACTABLE VTOW HOOK RELEASE Price $575 Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE 250 40 AIRFLO ENGINE MOUNT IDEAL FOR QIJICKY 500 PRICE 525 RC TECHNIQUES/MYERS continued page 21 between 600 micro-amps 15 ma Q What happens system PlC 5000 fails integrated circuit meter base may fail open short open no change short internal diode will blow open less second Q What effect does temperature have unit No significant calibration change range 0 150 degrees F Q Is ultimate battery management system No cant handle quick-charging plc sooo wont pick up fact cell has short-circuited since last charging need expanded-scale voltmeter things tools used intelligence understanding PlC 5000 allows make measurement couldnt make before servo demand flight Q Whats difference between PlC 5000 transmitter receiver No difference PlC 5000 accepts voltages 35 18 VDC personal standards column require use thoroughly understand product before writing about and/or recommending case system flu gave DEPENDABLE Friend CIL Launching week spare time spend testing As result some discrepancies found manufacturer has corrected production models feel have contributed bit development products also feel know well enough say confidence conservatively-designed units work right cant find way can hurt Some readers have complained need footnotes understand what Im talking about technology has its jargon outside technology cant expected know what special words mean Therefore will time time print few definitions end column Heres first installment ma - milliamperes Electrical current flows rate measured Amperes Electronic circuits use such tiny flows convenience measuring use units 1/1000 large called milli 1/1000th amperes VDC Volts Direct Current pressure causes electrical current flow measured Volts Batteries provide push push direction years ago people decided call battery current Direct Current still diode device allows current flow direction can think electrical check-valve wish case PlC 5000 check-valve used tiny instead blocking incorrect current resulting short circuit melts down like fuse completely disconnecting circuit Thats enough month Keep letters flowing folks George Myers 70 Froehlich Farm Road Hicks ville NY 11801 RC SCALE/WISCHERS continued page 33 hurst New Jersey past summer fascinated performance Peter French Zlin 526 British Nats So much purchased kit have flying Saudi Arabia has wing span 86 does aerobatics powered 60 engine because weighs 8 2 Ibs no US kits market can compare British National Sport Scale event won Grumman Skyrocket five foot wingspan powered two OS Max 20s scale speed model should move across sky same speed its real counterpart appears moving far enough away appear same size Said another way model its real counterpart correct distances viewer appear same size should also covering same angular distance same amount time should wait until national-level competition impose flight realism would have time standards estab lished explained AMA rule book dont see increasing permissible engine size competition will encourage modelers built light As has previously discussed column no question planes low wing loadings can made operate scale speeds questionable however whether would find desirable since cant control wind velocity air density Reynolds numbers best can hope achieve illusion scale speed argument has going since started writing column 1980 AMA rule book will contain ajudges guide should helpful establishing realism speed related Bob andDolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC TOLEDO/BECKMAN continued page 11 addition 11-member Board Repre sentatives selected board includes members throughout US Cana da member France Due time space limitations its im possible cover everything see Toledo year Ill adding re ports regular column over next few months omissions certain ly intentional readers conve nience addresses suppliers ganizations mentioned follow Aero Plan 101 SW 2nd St Pompano Beach FL 33060 Balsa USA PO Box 164 Marinette WI 54143 Barrons Scale Classics 1213 Holly Spring Lane Grand Blanc Ml 48439 Bob Dively Model Aircraft Inc 28001 Cha grin Blvd Woodmere OH 44122 108 Model Aviation Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gapless Hinges Gapless Hinge Slotter Strut Fairings Cockpit Coeming FUR~ST Send SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 AUDIO FLIGHT TIMER Prevents dead-stick landinas Generates incremental audio timing signals Ideal timing pattern flights giiaers Doass etc case less battery $2495 shipping Less case mounts transmitter $2195 shipping Write free brochure Industrial Inventions Inc RD2 463 US Route 1 Monmouth Jct New Jersey 08852 dont need cali friend time want get Control Line model air new remote release SAFE bC iauncher Strong Safe Ready4ogo anytime STRONG Safety pull-tested 125 lbs pressure strong enough iargest C/L airplanes SAFE Nasa built-in lock prevent accidental release IF NOT AT YOUR DEALER R DIRECT $5300sT CLAIR MODEL COMPONENTS P0 Box 5626 PP ndieUSAEugene OR 97405
Edition: Model Aviation - 1980/07
Page Numbers: 32, 33, 108
C SCALE Bob & Dolly Wischer HELPFUL hint Art Johnson Flyer newsletter Floridas Gold Coast Radio Con trollers comes hint Robart Universal Scale wheels closer others looking right military type scale planes However us hot climates have found tire gets flat rather quickly hot runway tire gets soft enough cut impact hard landing tried beefing up tires silicone mixture silicone micro balloons helped also distorted tire shape over period time Recently hit tech nique really works Just cut off bead old Robart tire size smaller model Stuff resulting inner-tubetype cap tire will have double layer tire will stand up very well resist cuts impact modification also lighter other techniques used beef up Robart wheels Another method stuffing tires cut doughnut sponge rubber has rather dense consistency Cut slightly oversize will job perfectly shaped time Robart used foam rubber inserts high load applications have heard no longer produced Hinges Control surface hinges scale models simulate action appearance found prototype must often made scratch modeler com mercial hinges high quality usefulness available relatively inexpensive just dont look like hinges used full scale aircraft either appearance operation point scale modeler separates thinking modeling practices closer observation distinctive detail found control surfaces real thing deeply slotted rudder elevator Douglas Boeing indicates presence hinge point far behind leading edge balanc ing area ahead hinge point extends Out air stream whenever surface deflected model depending size hinge line may much 1 rearward surface leading edge Beginning earliest applications Friese type ailerons planes have surfaces hinged along line near aileron lower surface some distance aft leading edge type hinge visible becomes scale feature gives model realistic character Tail surface hinges extend slots elevators rudder can made hinge posts plywood cemented holes stabilizer spars elevators rounded leading edge balsa block has its rear surface grooved full length snugly fit 3/32 diameter aluminum tube grooved surface later cemented elevator spar forming long thin box contain tube Slots cut through block width spacing match hinge posts have drilled running fit tube two hinge posts used elevator must held alignment inserting tube through holes epoxy hardens wind up wooden bearings effective long wearing airplane completely finished tube inserted elevator tip access hole filled painted Cost price aluminum tube little effort scale-like hinge Unlike elevators top surface ailerons usually smooth slots bottom Scale aileron flap hinges assembled similar manner except pin groove cut leading edge block near lower surface block shaped radius centered hinge pin planes complete hinge exposed below wing surface posts can made plywood aluminum sheet brass tube depending appearance desired exposed hinges greatest realism use hexagon head screw nut hinge 32 Model Aviation Unusual finish Willard Dedels deHavilland Chipmunk enamel over Super Coverite Glaskote fuel proofing Plane spans 103 weighs 185 lbs uses OS 90 engine Grumman F4F Wildcat built John Sullivan Louisiana Scale Squadron Partially completed P-38 background Photo Landry flight line Kitchener-Waterloo gathering Stars club Olean NYwaswell-represented Portion large spectatorcrowd background Kitchener-Waterloo few Fleet Trainers seen Built Concept Models kits popular plane Tiny scale screws available hobby shops Sig catalog Accurately locating hinge lines model also has considerable effect flight characteristics Friese type ailerons intended prevent adverse yaw turn inducing drag raised aileron because its nose dips below wing lower surface balances drag lowered aileron Air flowing through slot lower upper surface makes raised aileron effective Without feature tendency plane banked direction swing its tail same direction opposite what desired get smoothly coordinated turn rudder must used excessively prevent adverse tail swing Friese type ailerons need rudder coordination aileron minimized Flight model becomes realistic requires less effort transmitter Sopwith 1 /2 Strutter needs use rudder coordination ailerons smooth scale-like turns uses standard model hinges top aileron surface Several years ago during visit Paris Air Museum able inspect full scale plane surprised see its ailerons hinged bottom surface gap top veteran pilot has flown early types informed us ailerons lose effectiveness arrangement Obviously times better make scale errors favor better flying often wonder what control changes would occur model converted non-scale Friese type ailerons Flight realism again March 80 column asked opinions subject flight realism pertains contest activity received number answers some tirades against rules rule makers officials judges latter answers must taken proverbial grain salt coming persons dont recognize friends workers contests spend time energy money contestants can play Make no mistake fly contests participat ing personal enjoyment otherwise known playtime hard working organizers officials judges must considered serious modeler respected friends Except winners almost contestants tend lay blame low scores everyone themselves speak personal experi ence respect having times received what considered unjustly low marks pays resilient Rather complain attempt change rules build models adapt flying techniques conform existing rules disagreeable philosophy seems have worked letter came Dale Johnston has opportunity observe trends scale flying outside US Realism takes important role everywhere Read am pleased about article flight realism March MA am writing before finish magazine have minimal success trying convince fellow scale modelers home area Virginia what scale speed should Most agree should slower pattern flying almost agree should reduced same scale model modelers full scale pilots As point out article truly scale speed very difficult achieve maintain should scale modelers objective During relatively short time hobby have observed British have better appreciation flight realism achieve US can first remember being impressed Brit flying Fokker DR 1974 Aerolympics LakeContinued page 108 LETTERS TO HOT STUFF Hi Guys heres COBRA goes 230 mph quite twice span 9 ft -scale CUB goes about 30 mph Canopy fixtures set SUPER T fairing around landing gear wing attach canopy self cracked during final fitting stop-drilled filled crack SUPER T its stronger before dash palckard HOT STUFFED also nut plates pants set HOT STUFF prior riviting entire CUB HOT STUFFED holds together great through snap maneuvers COBRA rivited except mentioned above Stop get chance Id like see 1/4-scale HOT STUFF BIPE fly Thanks SUPER T really works great HOT STUFF & SUPER T SUPER ADHESIVES AVAILABLE IN 1/4 1/2 AND 2 OZ ALWAYS AT YOUR HOBBY DEALERS FULL-SIZE STRENGTH WHATEVER SCALE YOU BUILD 0t4 PO BOX 836 SIMI VALLEY CA 93065 E 805 522-0062 July 1980 33 Rudderdetailon Bobs new DouglasA-20 model Scale rudder hinges require deep slots lead ing edge Plywood hinge posts extend slots fin spar Note aluminum tube hinge pin protruding top rudder column COBRA OWNED AND RACED BY AL KRAMER SAN-VAL FLYING SERVICE VAN NUYS CALIFORNIA Winning Ideas FOURMOST RETRACTABLE VTOW HOOK RELEASE Price $575 Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight oz OTHER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE 250 40 AIRFLO ENGINE MOUNT IDEAL FOR QIJICKY 500 PRICE 525 RC TECHNIQUES/MYERS continued page 21 between 600 micro-amps 15 ma Q What happens system PlC 5000 fails integrated circuit meter base may fail open short open no change short internal diode will blow open less second Q What effect does temperature have unit No significant calibration change range 0 150 degrees F Q Is ultimate battery management system No cant handle quick-charging plc sooo wont pick up fact cell has short-circuited since last charging need expanded-scale voltmeter things tools used intelligence understanding PlC 5000 allows make measurement couldnt make before servo demand flight Q Whats difference between PlC 5000 transmitter receiver No difference PlC 5000 accepts voltages 35 18 VDC personal standards column require use thoroughly understand product before writing about and/or recommending case system flu gave DEPENDABLE Friend CIL Launching week spare time spend testing As result some discrepancies found manufacturer has corrected production models feel have contributed bit development products also feel know well enough say confidence conservatively-designed units work right cant find way can hurt Some readers have complained need footnotes understand what Im talking about technology has its jargon outside technology cant expected know what special words mean Therefore will time time print few definitions end column Heres first installment ma - milliamperes Electrical current flows rate measured Amperes Electronic circuits use such tiny flows convenience measuring use units 1/1000 large called milli 1/1000th amperes VDC Volts Direct Current pressure causes electrical current flow measured Volts Batteries provide push push direction years ago people decided call battery current Direct Current still diode device allows current flow direction can think electrical check-valve wish case PlC 5000 check-valve used tiny instead blocking incorrect current resulting short circuit melts down like fuse completely disconnecting circuit Thats enough month Keep letters flowing folks George Myers 70 Froehlich Farm Road Hicks ville NY 11801 RC SCALE/WISCHERS continued page 33 hurst New Jersey past summer fascinated performance Peter French Zlin 526 British Nats So much purchased kit have flying Saudi Arabia has wing span 86 does aerobatics powered 60 engine because weighs 8 2 Ibs no US kits market can compare British National Sport Scale event won Grumman Skyrocket five foot wingspan powered two OS Max 20s scale speed model should move across sky same speed its real counterpart appears moving far enough away appear same size Said another way model its real counterpart correct distances viewer appear same size should also covering same angular distance same amount time should wait until national-level competition impose flight realism would have time standards estab lished explained AMA rule book dont see increasing permissible engine size competition will encourage modelers built light As has previously discussed column no question planes low wing loadings can made operate scale speeds questionable however whether would find desirable since cant control wind velocity air density Reynolds numbers best can hope achieve illusion scale speed argument has going since started writing column 1980 AMA rule book will contain ajudges guide should helpful establishing realism speed related Bob andDolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC TOLEDO/BECKMAN continued page 11 addition 11-member Board Repre sentatives selected board includes members throughout US Cana da member France Due time space limitations its im possible cover everything see Toledo year Ill adding re ports regular column over next few months omissions certain ly intentional readers conve nience addresses suppliers ganizations mentioned follow Aero Plan 101 SW 2nd St Pompano Beach FL 33060 Balsa USA PO Box 164 Marinette WI 54143 Barrons Scale Classics 1213 Holly Spring Lane Grand Blanc Ml 48439 Bob Dively Model Aircraft Inc 28001 Cha grin Blvd Woodmere OH 44122 108 Model Aviation Fuel Fitting Sets Fuel Shut Off Fuel Manifold Gapless Hinges Gapless Hinge Slotter Strut Fairings Cockpit Coeming FUR~ST Send SASE Complete Information 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 AUDIO FLIGHT TIMER Prevents dead-stick landinas Generates incremental audio timing signals Ideal timing pattern flights giiaers Doass etc case less battery $2495 shipping Less case mounts transmitter $2195 shipping Write free brochure Industrial Inventions Inc RD2 463 US Route 1 Monmouth Jct New Jersey 08852 dont need cali friend time want get Control Line model air new remote release SAFE bC iauncher Strong Safe Ready4ogo anytime STRONG Safety pull-tested 125 lbs pressure strong enough iargest C/L airplanes SAFE Nasa built-in lock prevent accidental release IF NOT AT YOUR DEALER R DIRECT $5300sT CLAIR MODEL COMPONENTS P0 Box 5626 PP ndieUSAEugene OR 97405