Ion m bus Day hol iday other en chanted flying days cloudless blue sky chill morning air good lift over en tire area wandered grass strip used club Reston Vir ginia infor Bill Winter mal fly-ins hap pen chance vibes always good Reston must have called morning Hurst Bowers also heard calland Don Srull Hurst George Clapp Mrs way Syracuse said crate razorbackl George him recently built old-timer own cabin free flight 1936 made 12 years old er RC old-timer 1948 sparkled blue orange transparent MonoKote George has beautiful plan Fairchild soon appear MA Srull photographer John Pres ton take pictures prewar 15powered Waco REMto appear future Model Aviation Cox 049powered Bucker Jungmeister just ailerons elevator Ace minisystem came locals bearing gaggle fine looking great flying sailplanes someone clamped frequency pin antenna feeling good As Jackie Gleason says sweet is1 have flying 1948 model RC Special ole Walt built design co-signed article chanix Illustrated years ago present ship about 4/5 size original looks like cross Stinson Rearwin scale down model sinister forces play too often smaller version dog example Berkeley scaled down Strucks magnificent New Ruler called American Acea medi um small versionthe mod jobs did exactly set world fire fact little black sheep family What happens di mensions areas decrease differ ent magnitudes Say have 60-inch airplane 10-inch chord 600 squares So scale half size Now span 30 inches 50% what begin area now 30 x 5 150 squares 25% bigger jobs area infers airplanes become increasingly bet ter scale up lousier scale down Well doesnt work infinity scale up far enough truly big model too light ly wind-loadedthus 20-pound Quar ter Scale may majestic flier 10 pounds mutated cousin indoor model scaling up down changes flight characteristics follows within reason performance can purposely altered way yield totally differ ent machine looks altered scaled-down RC Special totally different airplane compared big original controlled free flight smaller flies like real plane anything ever has pleasing scale speed control it feels like real light planes about two dozen have flown subject poor pilot judgment faulty hand ling exactly like full-scale aircraft fascinates us smooth grass runway will get off somewhere tween 100 200 feet calm hot humid air K&B 19 turning 10-3% 10% nitro fuel grass cut such takeoffs cliff hangers good takeoff stick just repeated ly tapped rotationever lightly daylight appears under wheels just tall grass looms ahead grass always cut smooth So horse models off ground stupid now seems FO yanked off takeoff tip stalled went inverted cartwheeled After repair consider ing high grass find often strips late season RO Sp fitted OS 30 4-in Williams Brothers scale vintage wheels cut through grass changed setting flat-bottomed wing 11/2 degrees positive enhance natural lift off yanks off real airplane What pilot would choose method com mitting suicide smallish wing high loading RC Special ship picks up speed twist around approaches 5-ing way ship will whistle level attitude try land Like real plane flaps must slowed up trim too muchl approach Slowed up settles nicelyjust does real T-Craft Piper Super Cruiser avoid floating far fence Play ing sink part piloting art land real seaplane water smooth cant see ex act surface twilight fuses surface shadows establish aircraft attitude speed back stick desired sink rate make corrections throttle stick Advance throttle reach out retard settle craft seeks surface airplanes redlined usually air speed have known characteristics ac ceptand honor Instructors prime things check pilots acquaint strange aircraft ac cept full-scale traits model model-piloting becomes enormously interesting exciting ship wing dropper let fly slowly can push forward stick maintain speed So Reston lift everywhere Gliders circling silently levels top high mistaken high-flying jet astonished found diminished rather highly loaded old-timer riding lift silent birds engine ticking over presently topped glider engine died no difference Set notch right trim ship would describe very wide slightly banked circle lift circle would tighten nose would seem drop bit airspeed picked up ship sailed around ever widening circles went up fun nel Twice spiraled down land resumed circling would have vanished permitted thermaling Continued page 66 4 Model Aviation MAP range plans England largest compre hensive world Buya plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Aeromodeling Model Boats Cars Model Engineering Radio ControlAircraft model & Allied MAP Publicutiorn Ltd Available theU SA Price Si 50 including postage Sales Office P0 Box 35 BrIdge Street Hemel Hempatead Herts HP1 lEE England Openers/Winter continued page 4 like Slope Soarer relatively fast fly ing ship withits conspicuous small wing loves ride lift nothing have 20-25 minute flights OS 4-oz Sullivan slant tank includ ing several climbs perhaps couple passes Incidentally 05 30 much overlooked engine sport flier Starting economy reliability low throttle truly outstanding Thats important unreconstruct ed hand-flipper Once trimmed full up gust thermal caused wing drop ship plummet Usually say bad improve design Use washout click forward trim enough airplane fly like pilot Right Regardless what Old George said last month about flying high way hear soul music THE MAN AT THE TOP solved flying site problem rather unique way Worth has fixation fly pre cisely feels like close home possible prop wrench small fuel can squeeze bulb can much else Hes got Buzzard Bombshell Any place can take few steps lay old crate air trees poles too close roost Buzzard privy because have nearby places flylike almost schoolyard athletic fieldyou have yourself wants fly alone So sun sinks West phone tinkles query Feel like flying always get fly Buzzarda little Buzzard historic crate great free flight model built thousands late thirties just after war has going came Califor ala great big black box few years ago packed purple excelsior sprinkled liberally bright colored jelly beans Bob Harrahhe still has two Buzzards says favorite airplanehad revived historic Joe Konefes Buzzard RCM radio about 1972 Silkspan covered has sorts artistic patches shapes colors pinked edges yet witch es broomsall sorts stuff flying crazy quilt another great sport en gine Enya 35 JW lets free flight until fuel runs out gives nudge once have got see thing soarlike forever real buzzards circle Its squarish arch itecture fits mood flight seemed up half afternoon about half way down started time itit brought down down elevator Nine half minuteseven Man weve got get act Any great free flight will bother cutoff dates So have scaled up Midwest Sniffer six feet Buzzard still hanging next year will joined big Sniffer know darn buz zards came down model circled overhead about 50 feet after landed Birds feather As old free flighters seemed whole new worldwhat dreamed decades ago able watch genuine free flight model circle thermal on thermal dies seek another No chase bring home feet everytime Operator 13 informs us brief vacation JW hauled big Buz zard beach put up repeat edly day right off beach offseason crowd applauded after flight did folks high hotel window balconies FO isnt sure exec qualifies show team does think Harrah ought rush us bright colored jelly beans GOOD ISSUES OF MAGAZINES like good flying sessions times speak bubbles appear around head bolts pin hole feed line drives up wall What think smash proves so-so What take granted may bring flood mail people said last Aprils issue greatest issue anything ever seen So examine thing scratch head think What talking about could same thing again over over could ride mythical great wave Well April contained exception al scale jobs scale movement fire may think present issue isnt half bad good things wont find other magazines ex ample Glenn Lee presents Part absolutely masterful article engines two great American writers subject named Lee related Another example Mike Gretzs sur prising column control line scale sub jects gist Mikes presentation good RC scale kit automatical ly good CL subject Mike describes approach engine control systems balancethe works dont have point out coming master designer flier what truly significant man good RC scale captive variety better known Since weve solid approval publishing philosophy good modelers interested phases hobbythough given modeler may build two three typesGretzs broad point view testifies ef fectiveness cosmopolitan approach Continued page 92 66 Model Aviation U. kinds Handbook 1 Handbook 2 Handbook 3 Handbook 4 also large group AMAers describe themselves general terest24% include RC doesnt follow CL FF types add up 24% comprise own groups Other people radio pursue second third supple mentary interest active say two categories double knowledge skill and/or enjoy ment modeling character im proves exponential way Note said wont find other magazines MA does have Aladdins lamp Its just publish under wraps wishing compete head head contemporaries editor does bomb north 38th parallel note genuine plea sure magazines seemed skittish few years ago now harvesting fortune advertising look better ever imagined competition fearedthe notion however spooky may have seemed dark room did result new achieve ments everybodys quality Nor did anyones precious advertising diminish rather opposite No advertiser will yank ad pays him nobly 20 new magazines appeared Success should make secure people MA tills its own garden brings new AMA members Thousands copies now sold hobby shops Mag azines usually witness 50% turnover three issues copies sold display public What happens drop outs Theybecomesubscrib ers MAs case join AMA mem bership grows association strength grows influence bene fits effectiveness contents didnt interest hobby shop customers MA would blunted membership toot MA non-profit As grows money goes back magazine pages year allows strong allowance radioan editorial service kinds model ing thereby protecting endangered species content designed good can make dup licating lucrative kit reviews other magazines so Model Aviation has duties no profitminded publisher would live shall keep faith HOW IMPORTANT airfoil selec tion hundreds thou sands scientifically developed airfoils covering conceivable need terms speed lift drag stability efficiency Yet years FO has guarded set sacred French curves has never evident genuine airfoil say Clark Y will fly model better something cook up yourself suppose modeler worth salt knows thick make section purpose put high point what camber wants what leading edge real sec tions have specified coordinates stations along chord test ed certain test size air density tunnel air speed Reynolds numbers times higher work models know great looking section own may dog given model may super Unlimited Rubber job seems have air brakes free flight gas model no good better same model different size Weve done both ways times have learned nothing except homebrew thing roughed out given design problem always worksand model flies good other model its kind Tear off epaulets Beat drum slowly have heard Zip section famous frequently used section modeling Zip standard takes shape gleam eye Well known models made Zip famous stop short saying scientific section out manuals best applied proper size wing flown same loading same air speed etc Writing recent RC Sportsman 92 Model Aviation ___________ AMA No_____ Openers continued page 66 Eric Lister knowledgeable en gineer read respect has examining families airfoils Re cently reviewed really famous Grant X-8 developed interest ing derivatives various purposes analysis shows Charlies great air foil notably used KG right respect parameters laid down eminent authorities Erics anal ysis accurate What says true Also true Charlie Grant devel oped X-8 running pencil around outlines trout Letters Editor continued page 9 pattern machine ban items makes situation seems like few valid ways bring average flier event Im referring specifically Novice dont see being controlled prob lem Look pattern itself ict rules time altitude maneuvers direc tion etc one-design type model stagnation personified different pat tern designs available novice use pipes retracts high priced engines restricts entry Now concerning Schnuerle en gines. what about ones Perry directional porting believe ten-point reduction anyone chooses nonconventional engine would fair realistic approach what could evolve Restrict radios using 4 channels 8 channels available what. just use 4 Add 10 points fixed gear model has retracts leave locked down place same bonus Add 10 points conventional engine sub tract 10 Schnuerle PDP other trick engine Ban tuned pipes nov ice event see no need radical change Novice class simply needs opened up some allow participation year year decline entries shows its sick dead feel sure what have discussed will bring comments both pro con must try find consensus opinion work solution matter Ben J Garrett Brownwood TX prefer sit out leav ing people fly Pattern make answer editor impression Novice Advanced Expert Master classes created deal formidable problem minor portion fliers having such supreme flying skills others would compete Gar rett raises another criticismtho related Novice Enlightened comment will welcome About Engines/Lee continued page 15 complicated simple porting arrangements Perry Directional Porting PDP shown Fig 4-h consists two narrow bypass ports near exhaust port directed away exhaust port can used Schnuerle porting cross porting reduce unscavenged dead space near center piston Mechanical Improvements Quite eflec tive advances have made met allurgy used modern engines Pistons instance now machined out 2024-T35 bar stock rather die cast aluminum some forged out same similar alloys 2024 harder stronger has much greater hot strength die casting alloys result power due increased ri gidity greater lifetime due better wearing properties Connecting rods also made 2024-T35 aluminum forged shot-peened increase strength eliminate stress concentra tions Heads machined same alloy give greater resistance warpage better heat transfer Crankshafts made casehardened high-strength alloy steels Modern plating techniques allow aluminum parts such backplates January 1979 93 r IF YOU BUILD FIBERGLASS MODELS YOU NEED PFC brilliant white polyester resin putty form PEG made levelling dents dips ripples chips other imperfections fiberglass parts PEG non-sagging fast setting feathers out zero thickness peeling flaking can filed drilled sanded its completely fuel proof Use PEG filling repairing reinforcing bonding shaping making fillets build anything made fiberglass need PEG A Division Pettit Paint co Inc KhhlypuNy MEN 36 Pine Street Rockaway NJ 07860 J
Edition: Model Aviation - 1979/01
Page Numbers: 4, 66, 92, 93
Ion m bus Day hol iday other en chanted flying days cloudless blue sky chill morning air good lift over en tire area wandered grass strip used club Reston Vir ginia infor Bill Winter mal fly-ins hap pen chance vibes always good Reston must have called morning Hurst Bowers also heard calland Don Srull Hurst George Clapp Mrs way Syracuse said crate razorbackl George him recently built old-timer own cabin free flight 1936 made 12 years old er RC old-timer 1948 sparkled blue orange transparent MonoKote George has beautiful plan Fairchild soon appear MA Srull photographer John Pres ton take pictures prewar 15powered Waco REMto appear future Model Aviation Cox 049powered Bucker Jungmeister just ailerons elevator Ace minisystem came locals bearing gaggle fine looking great flying sailplanes someone clamped frequency pin antenna feeling good As Jackie Gleason says sweet is1 have flying 1948 model RC Special ole Walt built design co-signed article chanix Illustrated years ago present ship about 4/5 size original looks like cross Stinson Rearwin scale down model sinister forces play too often smaller version dog example Berkeley scaled down Strucks magnificent New Ruler called American Acea medi um small versionthe mod jobs did exactly set world fire fact little black sheep family What happens di mensions areas decrease differ ent magnitudes Say have 60-inch airplane 10-inch chord 600 squares So scale half size Now span 30 inches 50% what begin area now 30 x 5 150 squares 25% bigger jobs area infers airplanes become increasingly bet ter scale up lousier scale down Well doesnt work infinity scale up far enough truly big model too light ly wind-loadedthus 20-pound Quar ter Scale may majestic flier 10 pounds mutated cousin indoor model scaling up down changes flight characteristics follows within reason performance can purposely altered way yield totally differ ent machine looks altered scaled-down RC Special totally different airplane compared big original controlled free flight smaller flies like real plane anything ever has pleasing scale speed control it feels like real light planes about two dozen have flown subject poor pilot judgment faulty hand ling exactly like full-scale aircraft fascinates us smooth grass runway will get off somewhere tween 100 200 feet calm hot humid air K&B 19 turning 10-3% 10% nitro fuel grass cut such takeoffs cliff hangers good takeoff stick just repeated ly tapped rotationever lightly daylight appears under wheels just tall grass looms ahead grass always cut smooth So horse models off ground stupid now seems FO yanked off takeoff tip stalled went inverted cartwheeled After repair consider ing high grass find often strips late season RO Sp fitted OS 30 4-in Williams Brothers scale vintage wheels cut through grass changed setting flat-bottomed wing 11/2 degrees positive enhance natural lift off yanks off real airplane What pilot would choose method com mitting suicide smallish wing high loading RC Special ship picks up speed twist around approaches 5-ing way ship will whistle level attitude try land Like real plane flaps must slowed up trim too muchl approach Slowed up settles nicelyjust does real T-Craft Piper Super Cruiser avoid floating far fence Play ing sink part piloting art land real seaplane water smooth cant see ex act surface twilight fuses surface shadows establish aircraft attitude speed back stick desired sink rate make corrections throttle stick Advance throttle reach out retard settle craft seeks surface airplanes redlined usually air speed have known characteristics ac ceptand honor Instructors prime things check pilots acquaint strange aircraft ac cept full-scale traits model model-piloting becomes enormously interesting exciting ship wing dropper let fly slowly can push forward stick maintain speed So Reston lift everywhere Gliders circling silently levels top high mistaken high-flying jet astonished found diminished rather highly loaded old-timer riding lift silent birds engine ticking over presently topped glider engine died no difference Set notch right trim ship would describe very wide slightly banked circle lift circle would tighten nose would seem drop bit airspeed picked up ship sailed around ever widening circles went up fun nel Twice spiraled down land resumed circling would have vanished permitted thermaling Continued page 66 4 Model Aviation MAP range plans England largest compre hensive world Buya plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Aeromodeling Model Boats Cars Model Engineering Radio ControlAircraft model & Allied MAP Publicutiorn Ltd Available theU SA Price Si 50 including postage Sales Office P0 Box 35 BrIdge Street Hemel Hempatead Herts HP1 lEE England Openers/Winter continued page 4 like Slope Soarer relatively fast fly ing ship withits conspicuous small wing loves ride lift nothing have 20-25 minute flights OS 4-oz Sullivan slant tank includ ing several climbs perhaps couple passes Incidentally 05 30 much overlooked engine sport flier Starting economy reliability low throttle truly outstanding Thats important unreconstruct ed hand-flipper Once trimmed full up gust thermal caused wing drop ship plummet Usually say bad improve design Use washout click forward trim enough airplane fly like pilot Right Regardless what Old George said last month about flying high way hear soul music THE MAN AT THE TOP solved flying site problem rather unique way Worth has fixation fly pre cisely feels like close home possible prop wrench small fuel can squeeze bulb can much else Hes got Buzzard Bombshell Any place can take few steps lay old crate air trees poles too close roost Buzzard privy because have nearby places flylike almost schoolyard athletic fieldyou have yourself wants fly alone So sun sinks West phone tinkles query Feel like flying always get fly Buzzarda little Buzzard historic crate great free flight model built thousands late thirties just after war has going came Califor ala great big black box few years ago packed purple excelsior sprinkled liberally bright colored jelly beans Bob Harrahhe still has two Buzzards says favorite airplanehad revived historic Joe Konefes Buzzard RCM radio about 1972 Silkspan covered has sorts artistic patches shapes colors pinked edges yet witch es broomsall sorts stuff flying crazy quilt another great sport en gine Enya 35 JW lets free flight until fuel runs out gives nudge once have got see thing soarlike forever real buzzards circle Its squarish arch itecture fits mood flight seemed up half afternoon about half way down started time itit brought down down elevator Nine half minuteseven Man weve got get act Any great free flight will bother cutoff dates So have scaled up Midwest Sniffer six feet Buzzard still hanging next year will joined big Sniffer know darn buz zards came down model circled overhead about 50 feet after landed Birds feather As old free flighters seemed whole new worldwhat dreamed decades ago able watch genuine free flight model circle thermal on thermal dies seek another No chase bring home feet everytime Operator 13 informs us brief vacation JW hauled big Buz zard beach put up repeat edly day right off beach offseason crowd applauded after flight did folks high hotel window balconies FO isnt sure exec qualifies show team does think Harrah ought rush us bright colored jelly beans GOOD ISSUES OF MAGAZINES like good flying sessions times speak bubbles appear around head bolts pin hole feed line drives up wall What think smash proves so-so What take granted may bring flood mail people said last Aprils issue greatest issue anything ever seen So examine thing scratch head think What talking about could same thing again over over could ride mythical great wave Well April contained exception al scale jobs scale movement fire may think present issue isnt half bad good things wont find other magazines ex ample Glenn Lee presents Part absolutely masterful article engines two great American writers subject named Lee related Another example Mike Gretzs sur prising column control line scale sub jects gist Mikes presentation good RC scale kit automatical ly good CL subject Mike describes approach engine control systems balancethe works dont have point out coming master designer flier what truly significant man good RC scale captive variety better known Since weve solid approval publishing philosophy good modelers interested phases hobbythough given modeler may build two three typesGretzs broad point view testifies ef fectiveness cosmopolitan approach Continued page 92 66 Model Aviation U. kinds Handbook 1 Handbook 2 Handbook 3 Handbook 4 also large group AMAers describe themselves general terest24% include RC doesnt follow CL FF types add up 24% comprise own groups Other people radio pursue second third supple mentary interest active say two categories double knowledge skill and/or enjoy ment modeling character im proves exponential way Note said wont find other magazines MA does have Aladdins lamp Its just publish under wraps wishing compete head head contemporaries editor does bomb north 38th parallel note genuine plea sure magazines seemed skittish few years ago now harvesting fortune advertising look better ever imagined competition fearedthe notion however spooky may have seemed dark room did result new achieve ments everybodys quality Nor did anyones precious advertising diminish rather opposite No advertiser will yank ad pays him nobly 20 new magazines appeared Success should make secure people MA tills its own garden brings new AMA members Thousands copies now sold hobby shops Mag azines usually witness 50% turnover three issues copies sold display public What happens drop outs Theybecomesubscrib ers MAs case join AMA mem bership grows association strength grows influence bene fits effectiveness contents didnt interest hobby shop customers MA would blunted membership toot MA non-profit As grows money goes back magazine pages year allows strong allowance radioan editorial service kinds model ing thereby protecting endangered species content designed good can make dup licating lucrative kit reviews other magazines so Model Aviation has duties no profitminded publisher would live shall keep faith HOW IMPORTANT airfoil selec tion hundreds thou sands scientifically developed airfoils covering conceivable need terms speed lift drag stability efficiency Yet years FO has guarded set sacred French curves has never evident genuine airfoil say Clark Y will fly model better something cook up yourself suppose modeler worth salt knows thick make section purpose put high point what camber wants what leading edge real sec tions have specified coordinates stations along chord test ed certain test size air density tunnel air speed Reynolds numbers times higher work models know great looking section own may dog given model may super Unlimited Rubber job seems have air brakes free flight gas model no good better same model different size Weve done both ways times have learned nothing except homebrew thing roughed out given design problem always worksand model flies good other model its kind Tear off epaulets Beat drum slowly have heard Zip section famous frequently used section modeling Zip standard takes shape gleam eye Well known models made Zip famous stop short saying scientific section out manuals best applied proper size wing flown same loading same air speed etc Writing recent RC Sportsman 92 Model Aviation ___________ AMA No_____ Openers continued page 66 Eric Lister knowledgeable en gineer read respect has examining families airfoils Re cently reviewed really famous Grant X-8 developed interest ing derivatives various purposes analysis shows Charlies great air foil notably used KG right respect parameters laid down eminent authorities Erics anal ysis accurate What says true Also true Charlie Grant devel oped X-8 running pencil around outlines trout Letters Editor continued page 9 pattern machine ban items makes situation seems like few valid ways bring average flier event Im referring specifically Novice dont see being controlled prob lem Look pattern itself ict rules time altitude maneuvers direc tion etc one-design type model stagnation personified different pat tern designs available novice use pipes retracts high priced engines restricts entry Now concerning Schnuerle en gines. what about ones Perry directional porting believe ten-point reduction anyone chooses nonconventional engine would fair realistic approach what could evolve Restrict radios using 4 channels 8 channels available what. just use 4 Add 10 points fixed gear model has retracts leave locked down place same bonus Add 10 points conventional engine sub tract 10 Schnuerle PDP other trick engine Ban tuned pipes nov ice event see no need radical change Novice class simply needs opened up some allow participation year year decline entries shows its sick dead feel sure what have discussed will bring comments both pro con must try find consensus opinion work solution matter Ben J Garrett Brownwood TX prefer sit out leav ing people fly Pattern make answer editor impression Novice Advanced Expert Master classes created deal formidable problem minor portion fliers having such supreme flying skills others would compete Gar rett raises another criticismtho related Novice Enlightened comment will welcome About Engines/Lee continued page 15 complicated simple porting arrangements Perry Directional Porting PDP shown Fig 4-h consists two narrow bypass ports near exhaust port directed away exhaust port can used Schnuerle porting cross porting reduce unscavenged dead space near center piston Mechanical Improvements Quite eflec tive advances have made met allurgy used modern engines Pistons instance now machined out 2024-T35 bar stock rather die cast aluminum some forged out same similar alloys 2024 harder stronger has much greater hot strength die casting alloys result power due increased ri gidity greater lifetime due better wearing properties Connecting rods also made 2024-T35 aluminum forged shot-peened increase strength eliminate stress concentra tions Heads machined same alloy give greater resistance warpage better heat transfer Crankshafts made casehardened high-strength alloy steels Modern plating techniques allow aluminum parts such backplates January 1979 93 r IF YOU BUILD FIBERGLASS MODELS YOU NEED PFC brilliant white polyester resin putty form PEG made levelling dents dips ripples chips other imperfections fiberglass parts PEG non-sagging fast setting feathers out zero thickness peeling flaking can filed drilled sanded its completely fuel proof Use PEG filling repairing reinforcing bonding shaping making fillets build anything made fiberglass need PEG A Division Pettit Paint co Inc KhhlypuNy MEN 36 Pine Street Rockaway NJ 07860 J
Edition: Model Aviation - 1979/01
Page Numbers: 4, 66, 92, 93
Ion m bus Day hol iday other en chanted flying days cloudless blue sky chill morning air good lift over en tire area wandered grass strip used club Reston Vir ginia infor Bill Winter mal fly-ins hap pen chance vibes always good Reston must have called morning Hurst Bowers also heard calland Don Srull Hurst George Clapp Mrs way Syracuse said crate razorbackl George him recently built old-timer own cabin free flight 1936 made 12 years old er RC old-timer 1948 sparkled blue orange transparent MonoKote George has beautiful plan Fairchild soon appear MA Srull photographer John Pres ton take pictures prewar 15powered Waco REMto appear future Model Aviation Cox 049powered Bucker Jungmeister just ailerons elevator Ace minisystem came locals bearing gaggle fine looking great flying sailplanes someone clamped frequency pin antenna feeling good As Jackie Gleason says sweet is1 have flying 1948 model RC Special ole Walt built design co-signed article chanix Illustrated years ago present ship about 4/5 size original looks like cross Stinson Rearwin scale down model sinister forces play too often smaller version dog example Berkeley scaled down Strucks magnificent New Ruler called American Acea medi um small versionthe mod jobs did exactly set world fire fact little black sheep family What happens di mensions areas decrease differ ent magnitudes Say have 60-inch airplane 10-inch chord 600 squares So scale half size Now span 30 inches 50% what begin area now 30 x 5 150 squares 25% bigger jobs area infers airplanes become increasingly bet ter scale up lousier scale down Well doesnt work infinity scale up far enough truly big model too light ly wind-loadedthus 20-pound Quar ter Scale may majestic flier 10 pounds mutated cousin indoor model scaling up down changes flight characteristics follows within reason performance can purposely altered way yield totally differ ent machine looks altered scaled-down RC Special totally different airplane compared big original controlled free flight smaller flies like real plane anything ever has pleasing scale speed control it feels like real light planes about two dozen have flown subject poor pilot judgment faulty hand ling exactly like full-scale aircraft fascinates us smooth grass runway will get off somewhere tween 100 200 feet calm hot humid air K&B 19 turning 10-3% 10% nitro fuel grass cut such takeoffs cliff hangers good takeoff stick just repeated ly tapped rotationever lightly daylight appears under wheels just tall grass looms ahead grass always cut smooth So horse models off ground stupid now seems FO yanked off takeoff tip stalled went inverted cartwheeled After repair consider ing high grass find often strips late season RO Sp fitted OS 30 4-in Williams Brothers scale vintage wheels cut through grass changed setting flat-bottomed wing 11/2 degrees positive enhance natural lift off yanks off real airplane What pilot would choose method com mitting suicide smallish wing high loading RC Special ship picks up speed twist around approaches 5-ing way ship will whistle level attitude try land Like real plane flaps must slowed up trim too muchl approach Slowed up settles nicelyjust does real T-Craft Piper Super Cruiser avoid floating far fence Play ing sink part piloting art land real seaplane water smooth cant see ex act surface twilight fuses surface shadows establish aircraft attitude speed back stick desired sink rate make corrections throttle stick Advance throttle reach out retard settle craft seeks surface airplanes redlined usually air speed have known characteristics ac ceptand honor Instructors prime things check pilots acquaint strange aircraft ac cept full-scale traits model model-piloting becomes enormously interesting exciting ship wing dropper let fly slowly can push forward stick maintain speed So Reston lift everywhere Gliders circling silently levels top high mistaken high-flying jet astonished found diminished rather highly loaded old-timer riding lift silent birds engine ticking over presently topped glider engine died no difference Set notch right trim ship would describe very wide slightly banked circle lift circle would tighten nose would seem drop bit airspeed picked up ship sailed around ever widening circles went up fun nel Twice spiraled down land resumed circling would have vanished permitted thermaling Continued page 66 4 Model Aviation MAP range plans England largest compre hensive world Buya plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Aeromodeling Model Boats Cars Model Engineering Radio ControlAircraft model & Allied MAP Publicutiorn Ltd Available theU SA Price Si 50 including postage Sales Office P0 Box 35 BrIdge Street Hemel Hempatead Herts HP1 lEE England Openers/Winter continued page 4 like Slope Soarer relatively fast fly ing ship withits conspicuous small wing loves ride lift nothing have 20-25 minute flights OS 4-oz Sullivan slant tank includ ing several climbs perhaps couple passes Incidentally 05 30 much overlooked engine sport flier Starting economy reliability low throttle truly outstanding Thats important unreconstruct ed hand-flipper Once trimmed full up gust thermal caused wing drop ship plummet Usually say bad improve design Use washout click forward trim enough airplane fly like pilot Right Regardless what Old George said last month about flying high way hear soul music THE MAN AT THE TOP solved flying site problem rather unique way Worth has fixation fly pre cisely feels like close home possible prop wrench small fuel can squeeze bulb can much else Hes got Buzzard Bombshell Any place can take few steps lay old crate air trees poles too close roost Buzzard privy because have nearby places flylike almost schoolyard athletic fieldyou have yourself wants fly alone So sun sinks West phone tinkles query Feel like flying always get fly Buzzarda little Buzzard historic crate great free flight model built thousands late thirties just after war has going came Califor ala great big black box few years ago packed purple excelsior sprinkled liberally bright colored jelly beans Bob Harrahhe still has two Buzzards says favorite airplanehad revived historic Joe Konefes Buzzard RCM radio about 1972 Silkspan covered has sorts artistic patches shapes colors pinked edges yet witch es broomsall sorts stuff flying crazy quilt another great sport en gine Enya 35 JW lets free flight until fuel runs out gives nudge once have got see thing soarlike forever real buzzards circle Its squarish arch itecture fits mood flight seemed up half afternoon about half way down started time itit brought down down elevator Nine half minuteseven Man weve got get act Any great free flight will bother cutoff dates So have scaled up Midwest Sniffer six feet Buzzard still hanging next year will joined big Sniffer know darn buz zards came down model circled overhead about 50 feet after landed Birds feather As old free flighters seemed whole new worldwhat dreamed decades ago able watch genuine free flight model circle thermal on thermal dies seek another No chase bring home feet everytime Operator 13 informs us brief vacation JW hauled big Buz zard beach put up repeat edly day right off beach offseason crowd applauded after flight did folks high hotel window balconies FO isnt sure exec qualifies show team does think Harrah ought rush us bright colored jelly beans GOOD ISSUES OF MAGAZINES like good flying sessions times speak bubbles appear around head bolts pin hole feed line drives up wall What think smash proves so-so What take granted may bring flood mail people said last Aprils issue greatest issue anything ever seen So examine thing scratch head think What talking about could same thing again over over could ride mythical great wave Well April contained exception al scale jobs scale movement fire may think present issue isnt half bad good things wont find other magazines ex ample Glenn Lee presents Part absolutely masterful article engines two great American writers subject named Lee related Another example Mike Gretzs sur prising column control line scale sub jects gist Mikes presentation good RC scale kit automatical ly good CL subject Mike describes approach engine control systems balancethe works dont have point out coming master designer flier what truly significant man good RC scale captive variety better known Since weve solid approval publishing philosophy good modelers interested phases hobbythough given modeler may build two three typesGretzs broad point view testifies ef fectiveness cosmopolitan approach Continued page 92 66 Model Aviation U. kinds Handbook 1 Handbook 2 Handbook 3 Handbook 4 also large group AMAers describe themselves general terest24% include RC doesnt follow CL FF types add up 24% comprise own groups Other people radio pursue second third supple mentary interest active say two categories double knowledge skill and/or enjoy ment modeling character im proves exponential way Note said wont find other magazines MA does have Aladdins lamp Its just publish under wraps wishing compete head head contemporaries editor does bomb north 38th parallel note genuine plea sure magazines seemed skittish few years ago now harvesting fortune advertising look better ever imagined competition fearedthe notion however spooky may have seemed dark room did result new achieve ments everybodys quality Nor did anyones precious advertising diminish rather opposite No advertiser will yank ad pays him nobly 20 new magazines appeared Success should make secure people MA tills its own garden brings new AMA members Thousands copies now sold hobby shops Mag azines usually witness 50% turnover three issues copies sold display public What happens drop outs Theybecomesubscrib ers MAs case join AMA mem bership grows association strength grows influence bene fits effectiveness contents didnt interest hobby shop customers MA would blunted membership toot MA non-profit As grows money goes back magazine pages year allows strong allowance radioan editorial service kinds model ing thereby protecting endangered species content designed good can make dup licating lucrative kit reviews other magazines so Model Aviation has duties no profitminded publisher would live shall keep faith HOW IMPORTANT airfoil selec tion hundreds thou sands scientifically developed airfoils covering conceivable need terms speed lift drag stability efficiency Yet years FO has guarded set sacred French curves has never evident genuine airfoil say Clark Y will fly model better something cook up yourself suppose modeler worth salt knows thick make section purpose put high point what camber wants what leading edge real sec tions have specified coordinates stations along chord test ed certain test size air density tunnel air speed Reynolds numbers times higher work models know great looking section own may dog given model may super Unlimited Rubber job seems have air brakes free flight gas model no good better same model different size Weve done both ways times have learned nothing except homebrew thing roughed out given design problem always worksand model flies good other model its kind Tear off epaulets Beat drum slowly have heard Zip section famous frequently used section modeling Zip standard takes shape gleam eye Well known models made Zip famous stop short saying scientific section out manuals best applied proper size wing flown same loading same air speed etc Writing recent RC Sportsman 92 Model Aviation ___________ AMA No_____ Openers continued page 66 Eric Lister knowledgeable en gineer read respect has examining families airfoils Re cently reviewed really famous Grant X-8 developed interest ing derivatives various purposes analysis shows Charlies great air foil notably used KG right respect parameters laid down eminent authorities Erics anal ysis accurate What says true Also true Charlie Grant devel oped X-8 running pencil around outlines trout Letters Editor continued page 9 pattern machine ban items makes situation seems like few valid ways bring average flier event Im referring specifically Novice dont see being controlled prob lem Look pattern itself ict rules time altitude maneuvers direc tion etc one-design type model stagnation personified different pat tern designs available novice use pipes retracts high priced engines restricts entry Now concerning Schnuerle en gines. what about ones Perry directional porting believe ten-point reduction anyone chooses nonconventional engine would fair realistic approach what could evolve Restrict radios using 4 channels 8 channels available what. just use 4 Add 10 points fixed gear model has retracts leave locked down place same bonus Add 10 points conventional engine sub tract 10 Schnuerle PDP other trick engine Ban tuned pipes nov ice event see no need radical change Novice class simply needs opened up some allow participation year year decline entries shows its sick dead feel sure what have discussed will bring comments both pro con must try find consensus opinion work solution matter Ben J Garrett Brownwood TX prefer sit out leav ing people fly Pattern make answer editor impression Novice Advanced Expert Master classes created deal formidable problem minor portion fliers having such supreme flying skills others would compete Gar rett raises another criticismtho related Novice Enlightened comment will welcome About Engines/Lee continued page 15 complicated simple porting arrangements Perry Directional Porting PDP shown Fig 4-h consists two narrow bypass ports near exhaust port directed away exhaust port can used Schnuerle porting cross porting reduce unscavenged dead space near center piston Mechanical Improvements Quite eflec tive advances have made met allurgy used modern engines Pistons instance now machined out 2024-T35 bar stock rather die cast aluminum some forged out same similar alloys 2024 harder stronger has much greater hot strength die casting alloys result power due increased ri gidity greater lifetime due better wearing properties Connecting rods also made 2024-T35 aluminum forged shot-peened increase strength eliminate stress concentra tions Heads machined same alloy give greater resistance warpage better heat transfer Crankshafts made casehardened high-strength alloy steels Modern plating techniques allow aluminum parts such backplates January 1979 93 r IF YOU BUILD FIBERGLASS MODELS YOU NEED PFC brilliant white polyester resin putty form PEG made levelling dents dips ripples chips other imperfections fiberglass parts PEG non-sagging fast setting feathers out zero thickness peeling flaking can filed drilled sanded its completely fuel proof Use PEG filling repairing reinforcing bonding shaping making fillets build anything made fiberglass need PEG A Division Pettit Paint co Inc KhhlypuNy MEN 36 Pine Street Rockaway NJ 07860 J
Edition: Model Aviation - 1979/01
Page Numbers: 4, 66, 92, 93
Ion m bus Day hol iday other en chanted flying days cloudless blue sky chill morning air good lift over en tire area wandered grass strip used club Reston Vir ginia infor Bill Winter mal fly-ins hap pen chance vibes always good Reston must have called morning Hurst Bowers also heard calland Don Srull Hurst George Clapp Mrs way Syracuse said crate razorbackl George him recently built old-timer own cabin free flight 1936 made 12 years old er RC old-timer 1948 sparkled blue orange transparent MonoKote George has beautiful plan Fairchild soon appear MA Srull photographer John Pres ton take pictures prewar 15powered Waco REMto appear future Model Aviation Cox 049powered Bucker Jungmeister just ailerons elevator Ace minisystem came locals bearing gaggle fine looking great flying sailplanes someone clamped frequency pin antenna feeling good As Jackie Gleason says sweet is1 have flying 1948 model RC Special ole Walt built design co-signed article chanix Illustrated years ago present ship about 4/5 size original looks like cross Stinson Rearwin scale down model sinister forces play too often smaller version dog example Berkeley scaled down Strucks magnificent New Ruler called American Acea medi um small versionthe mod jobs did exactly set world fire fact little black sheep family What happens di mensions areas decrease differ ent magnitudes Say have 60-inch airplane 10-inch chord 600 squares So scale half size Now span 30 inches 50% what begin area now 30 x 5 150 squares 25% bigger jobs area infers airplanes become increasingly bet ter scale up lousier scale down Well doesnt work infinity scale up far enough truly big model too light ly wind-loadedthus 20-pound Quar ter Scale may majestic flier 10 pounds mutated cousin indoor model scaling up down changes flight characteristics follows within reason performance can purposely altered way yield totally differ ent machine looks altered scaled-down RC Special totally different airplane compared big original controlled free flight smaller flies like real plane anything ever has pleasing scale speed control it feels like real light planes about two dozen have flown subject poor pilot judgment faulty hand ling exactly like full-scale aircraft fascinates us smooth grass runway will get off somewhere tween 100 200 feet calm hot humid air K&B 19 turning 10-3% 10% nitro fuel grass cut such takeoffs cliff hangers good takeoff stick just repeated ly tapped rotationever lightly daylight appears under wheels just tall grass looms ahead grass always cut smooth So horse models off ground stupid now seems FO yanked off takeoff tip stalled went inverted cartwheeled After repair consider ing high grass find often strips late season RO Sp fitted OS 30 4-in Williams Brothers scale vintage wheels cut through grass changed setting flat-bottomed wing 11/2 degrees positive enhance natural lift off yanks off real airplane What pilot would choose method com mitting suicide smallish wing high loading RC Special ship picks up speed twist around approaches 5-ing way ship will whistle level attitude try land Like real plane flaps must slowed up trim too muchl approach Slowed up settles nicelyjust does real T-Craft Piper Super Cruiser avoid floating far fence Play ing sink part piloting art land real seaplane water smooth cant see ex act surface twilight fuses surface shadows establish aircraft attitude speed back stick desired sink rate make corrections throttle stick Advance throttle reach out retard settle craft seeks surface airplanes redlined usually air speed have known characteristics ac ceptand honor Instructors prime things check pilots acquaint strange aircraft ac cept full-scale traits model model-piloting becomes enormously interesting exciting ship wing dropper let fly slowly can push forward stick maintain speed So Reston lift everywhere Gliders circling silently levels top high mistaken high-flying jet astonished found diminished rather highly loaded old-timer riding lift silent birds engine ticking over presently topped glider engine died no difference Set notch right trim ship would describe very wide slightly banked circle lift circle would tighten nose would seem drop bit airspeed picked up ship sailed around ever widening circles went up fun nel Twice spiraled down land resumed circling would have vanished permitted thermaling Continued page 66 4 Model Aviation MAP range plans England largest compre hensive world Buya plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Aeromodeling Model Boats Cars Model Engineering Radio ControlAircraft model & Allied MAP Publicutiorn Ltd Available theU SA Price Si 50 including postage Sales Office P0 Box 35 BrIdge Street Hemel Hempatead Herts HP1 lEE England Openers/Winter continued page 4 like Slope Soarer relatively fast fly ing ship withits conspicuous small wing loves ride lift nothing have 20-25 minute flights OS 4-oz Sullivan slant tank includ ing several climbs perhaps couple passes Incidentally 05 30 much overlooked engine sport flier Starting economy reliability low throttle truly outstanding Thats important unreconstruct ed hand-flipper Once trimmed full up gust thermal caused wing drop ship plummet Usually say bad improve design Use washout click forward trim enough airplane fly like pilot Right Regardless what Old George said last month about flying high way hear soul music THE MAN AT THE TOP solved flying site problem rather unique way Worth has fixation fly pre cisely feels like close home possible prop wrench small fuel can squeeze bulb can much else Hes got Buzzard Bombshell Any place can take few steps lay old crate air trees poles too close roost Buzzard privy because have nearby places flylike almost schoolyard athletic fieldyou have yourself wants fly alone So sun sinks West phone tinkles query Feel like flying always get fly Buzzarda little Buzzard historic crate great free flight model built thousands late thirties just after war has going came Califor ala great big black box few years ago packed purple excelsior sprinkled liberally bright colored jelly beans Bob Harrahhe still has two Buzzards says favorite airplanehad revived historic Joe Konefes Buzzard RCM radio about 1972 Silkspan covered has sorts artistic patches shapes colors pinked edges yet witch es broomsall sorts stuff flying crazy quilt another great sport en gine Enya 35 JW lets free flight until fuel runs out gives nudge once have got see thing soarlike forever real buzzards circle Its squarish arch itecture fits mood flight seemed up half afternoon about half way down started time itit brought down down elevator Nine half minuteseven Man weve got get act Any great free flight will bother cutoff dates So have scaled up Midwest Sniffer six feet Buzzard still hanging next year will joined big Sniffer know darn buz zards came down model circled overhead about 50 feet after landed Birds feather As old free flighters seemed whole new worldwhat dreamed decades ago able watch genuine free flight model circle thermal on thermal dies seek another No chase bring home feet everytime Operator 13 informs us brief vacation JW hauled big Buz zard beach put up repeat edly day right off beach offseason crowd applauded after flight did folks high hotel window balconies FO isnt sure exec qualifies show team does think Harrah ought rush us bright colored jelly beans GOOD ISSUES OF MAGAZINES like good flying sessions times speak bubbles appear around head bolts pin hole feed line drives up wall What think smash proves so-so What take granted may bring flood mail people said last Aprils issue greatest issue anything ever seen So examine thing scratch head think What talking about could same thing again over over could ride mythical great wave Well April contained exception al scale jobs scale movement fire may think present issue isnt half bad good things wont find other magazines ex ample Glenn Lee presents Part absolutely masterful article engines two great American writers subject named Lee related Another example Mike Gretzs sur prising column control line scale sub jects gist Mikes presentation good RC scale kit automatical ly good CL subject Mike describes approach engine control systems balancethe works dont have point out coming master designer flier what truly significant man good RC scale captive variety better known Since weve solid approval publishing philosophy good modelers interested phases hobbythough given modeler may build two three typesGretzs broad point view testifies ef fectiveness cosmopolitan approach Continued page 92 66 Model Aviation U. kinds Handbook 1 Handbook 2 Handbook 3 Handbook 4 also large group AMAers describe themselves general terest24% include RC doesnt follow CL FF types add up 24% comprise own groups Other people radio pursue second third supple mentary interest active say two categories double knowledge skill and/or enjoy ment modeling character im proves exponential way Note said wont find other magazines MA does have Aladdins lamp Its just publish under wraps wishing compete head head contemporaries editor does bomb north 38th parallel note genuine plea sure magazines seemed skittish few years ago now harvesting fortune advertising look better ever imagined competition fearedthe notion however spooky may have seemed dark room did result new achieve ments everybodys quality Nor did anyones precious advertising diminish rather opposite No advertiser will yank ad pays him nobly 20 new magazines appeared Success should make secure people MA tills its own garden brings new AMA members Thousands copies now sold hobby shops Mag azines usually witness 50% turnover three issues copies sold display public What happens drop outs Theybecomesubscrib ers MAs case join AMA mem bership grows association strength grows influence bene fits effectiveness contents didnt interest hobby shop customers MA would blunted membership toot MA non-profit As grows money goes back magazine pages year allows strong allowance radioan editorial service kinds model ing thereby protecting endangered species content designed good can make dup licating lucrative kit reviews other magazines so Model Aviation has duties no profitminded publisher would live shall keep faith HOW IMPORTANT airfoil selec tion hundreds thou sands scientifically developed airfoils covering conceivable need terms speed lift drag stability efficiency Yet years FO has guarded set sacred French curves has never evident genuine airfoil say Clark Y will fly model better something cook up yourself suppose modeler worth salt knows thick make section purpose put high point what camber wants what leading edge real sec tions have specified coordinates stations along chord test ed certain test size air density tunnel air speed Reynolds numbers times higher work models know great looking section own may dog given model may super Unlimited Rubber job seems have air brakes free flight gas model no good better same model different size Weve done both ways times have learned nothing except homebrew thing roughed out given design problem always worksand model flies good other model its kind Tear off epaulets Beat drum slowly have heard Zip section famous frequently used section modeling Zip standard takes shape gleam eye Well known models made Zip famous stop short saying scientific section out manuals best applied proper size wing flown same loading same air speed etc Writing recent RC Sportsman 92 Model Aviation ___________ AMA No_____ Openers continued page 66 Eric Lister knowledgeable en gineer read respect has examining families airfoils Re cently reviewed really famous Grant X-8 developed interest ing derivatives various purposes analysis shows Charlies great air foil notably used KG right respect parameters laid down eminent authorities Erics anal ysis accurate What says true Also true Charlie Grant devel oped X-8 running pencil around outlines trout Letters Editor continued page 9 pattern machine ban items makes situation seems like few valid ways bring average flier event Im referring specifically Novice dont see being controlled prob lem Look pattern itself ict rules time altitude maneuvers direc tion etc one-design type model stagnation personified different pat tern designs available novice use pipes retracts high priced engines restricts entry Now concerning Schnuerle en gines. what about ones Perry directional porting believe ten-point reduction anyone chooses nonconventional engine would fair realistic approach what could evolve Restrict radios using 4 channels 8 channels available what. just use 4 Add 10 points fixed gear model has retracts leave locked down place same bonus Add 10 points conventional engine sub tract 10 Schnuerle PDP other trick engine Ban tuned pipes nov ice event see no need radical change Novice class simply needs opened up some allow participation year year decline entries shows its sick dead feel sure what have discussed will bring comments both pro con must try find consensus opinion work solution matter Ben J Garrett Brownwood TX prefer sit out leav ing people fly Pattern make answer editor impression Novice Advanced Expert Master classes created deal formidable problem minor portion fliers having such supreme flying skills others would compete Gar rett raises another criticismtho related Novice Enlightened comment will welcome About Engines/Lee continued page 15 complicated simple porting arrangements Perry Directional Porting PDP shown Fig 4-h consists two narrow bypass ports near exhaust port directed away exhaust port can used Schnuerle porting cross porting reduce unscavenged dead space near center piston Mechanical Improvements Quite eflec tive advances have made met allurgy used modern engines Pistons instance now machined out 2024-T35 bar stock rather die cast aluminum some forged out same similar alloys 2024 harder stronger has much greater hot strength die casting alloys result power due increased ri gidity greater lifetime due better wearing properties Connecting rods also made 2024-T35 aluminum forged shot-peened increase strength eliminate stress concentra tions Heads machined same alloy give greater resistance warpage better heat transfer Crankshafts made casehardened high-strength alloy steels Modern plating techniques allow aluminum parts such backplates January 1979 93 r IF YOU BUILD FIBERGLASS MODELS YOU NEED PFC brilliant white polyester resin putty form PEG made levelling dents dips ripples chips other imperfections fiberglass parts PEG non-sagging fast setting feathers out zero thickness peeling flaking can filed drilled sanded its completely fuel proof Use PEG filling repairing reinforcing bonding shaping making fillets build anything made fiberglass need PEG A Division Pettit Paint co Inc KhhlypuNy MEN 36 Pine Street Rockaway NJ 07860 J