MIDWEST COMBAT Competitors EASY TO BUIIDmEASY TO FLY EASY TO WIN WITH Letters Editor letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Size article About Size Jan 78 very interesting enlightening However did notice minor error Q & position beginning #10 HO scale 1/87 1/96 answer cor rect accurate 1095 ft/sec Dick Gleason Austin MN can quote- author Brad Powers always thought 0 gauge trains quarter-scale /4 foot HO Half 0 called model train man said Dick Gleason correct apologies train gang Sacre Bleu Begs Differ Since Ive addicted World War scale models number years Bob Wischers remarks concerning RC scale December 77 issue Model Aviation disturb correct sessment Sport Scale becoming pattern event WW II fighters dead wrong implying lightly loaded models cannot competitive strong windsthey definitely flight judges will follow existing AMA rules Un fortunately experience familiar pattern events maneu vers judged rightly comparison absolute geometric perfec tion have apparently read scale rules clearly call judging maneuvers basis realism ie relation would performed real aircraft example few WW aircraft could slow aileron roll loss considerable altitude Similarly modern Immelmann turn bears little resemblance maneuvers per formed Lt Immelmann Clearly real ism also calls lightly loaded aircraft respond wind gusts Since remarks also observa tions 77 Nats less understandable judges ob viously well briefed CD Monty Groves would allow contestants elect maneuvers foreign aircraft modeled As result model Brandenberg W 18 flying boat scoring highest AMA scale flight about 1480 sq wing weighed slightly over 7 lbs some 11 oz per sq ft Furthermore flight made during windy part dayin fact model almost took off during proto taxi Bobs remarks also support com monly held belief light models very difficult fly breeze obviously easier model well trimmed has reasonable stability control characteristics particu larly difficult fly safely wind less its flying speed True doing geomet rically perfect smooth maneuvers un der such conditions next impossible light aircraft scale judges should take scale conditions account scoring myth light models difficult fly wind has genera ted observation rather personal experience rank novice invariably attracted light usually under-pow ered model Hence models type flown well observa tion grows conclusion cannot flown well observe what average pilots can light wing load ings has watch slope soaring sites loadings run low 8 10 oz per sq ft its always windy Yet average flyers will perform precision man euvers such touch-and-goes clifis edge frequently fly wind speed exceeds models minimum speed Im convinced within limits prac tical construction lighter scale model easier fly safely under conditions heavy model easily gets out hand low speedsoccasionally terminating flight involuntary snap rolland ground handling much difficult tail draggers Todays scale rules excellent implications followed per mit modeler wide choice subject resulting diversity attracts large numbers spectators scale meets hence popularizes hobby other hand pattern meets currently hold little spectator interest simply because youve seen youve seen Uniformity repetition spells boring health sport sincerely hope 78-79 rule book judges guide reinforce principles flight real ism specific instructions abandoned popular rapidly growing branch hobby will soon stagnate specialized event few experts similar control line racing Joe Tschirgi 6 Model Aviation EIIICELY Engine Sizes 15 19 Wing Span 3534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrat ed step-by-step plans Kit No 247 LIL SNIP Engine Size 049 Cu Wing Span 2534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated step-by-step plans two versions Kit No 246 MA IADOR Wing Span 42 control line combat model 35 engines Designed Rich Von Lopez Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated stepby-step planKit No 248 P miDwEST PRODUCTS CO (4 400 South Indiana St Hobart IndIana 46342 Santa Ana CA letter should carefully reread Joe seems disagreeing Bob Wischer main thrust reasoning concerns perception rules espe cially judges rules themselves considered opinion neither highly qualjfled gentlemen wrong additional comment will signi ficant appears Model Aviation Small World Maybe year ago friend Army showed model aviation magazine construction article about pat tern plane named Sequel Please let know name address designer can get plans airplane have October issue 77 magazine couldnt find plans list page 96 Please tell also back issue article about air plane available Karlheinz Schmid Augsburg W Germany Sequel published last sue American Aircraft Modeler magazine replaced R/C Sportsman has continued plan service Readers interested plans AAMwho keep writing us error should try R/C Sportsman PO Box 11247 Reno NV 89520 same day received Mr Schmids letter MA also heard Bud Weber designed Sequel hope publish ideas Wants am interested joining AMA could please tell procedure cost am interested control line flying process starting C/L club Ft Worth R/C club C/L Would please give some infor mation Rules Regulations etc regard ing phases C/L airplanes am enContinued page 60 TFox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line-Silicone-Is far strongest marketsemitransparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after ITEM FUEL UNEPRICEITEM FUEL UNEPnICE 86880 Small Neoprene2 Pkg.5086885 Small Clear Plastic2 Pkg.25 86881 Medium Nenprene2 P8g.6088886 Mediam Clear Plastic2 P8g.30 86882 Large Neoprene2 Pkg.7086887 Large Clear Plastic2 P8g.40 86883 Small Taft Line1 P8g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Taft Line1 Pkg7086889 Med Surgical Tubing2 P8g.50 86851 Large Taft Line1 Pkg10086890 Large Surgical Tubing2 P8g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thvo-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Products inc 779 EK-Products . . ch1978 7 SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE Et3489 63489 73344119 83%456129 945664 77%139 10467149 106W 8W149 106EW159 114877% 7% 7%8159 116EW169 11%67169 126179 125W179 1358219 1456249 1556309 18446389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B Poe SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HOLDER DF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755%6149 7SN 5/N 6N149 8%6%6%7 7%7%189 9647 747189 CONTROL LINE EED& RACING DIA PITCHPRICE 4%6%129 4%55%128 6788%149 77A10%11169 889189 89N 9%N189 8%77%189 912 13219 N NARROW Openers continued page 4 round beating out othersinclud ing two Open Class ships 15-minute round Ken could get down under 11-minute max no points rule 10-minute flight Incidentally Ken discovered inverted flight excellent way get Windlord out boomer So has proved flying wings can compete successfully sailplane competition Neil Liptaks plans Windlord collectors item MA just about despaired getting plans right glider-man Liptak came rescue nice Al Meyers engaged Liptak make magnificent plan pg 27 Mustang CL Sport-Scale/Stunter Alasfor us Neil about build house put away drawing pen guy would love fly Doc Mathews recently took over RC Old-Timers Jack Bolton business travels filled time does Doc grind out won derful old gassies flies high wide handsome enthusiasm would regenerate moribund Doc 45-year-old family dentist cant hurt us anymore Doc small farm ing community 2000 souls Galesburg KS wife Joann very pa tient lady Two sons Mark pre-law Senior Bruce HS Senior thinks world shaped like bas ketball Daughter Shelly sopho honor student engineering Both boys show up widespread FF contests Between men folk have garnered cabinet full trophies everything Indoor Doc has modeling since seven first flew O&R 23 Fireball got RC 1952 An avid competitor hes 11 Nats uncountable local meets within 400 miles first OT 3-channel Bombshell eight years ago describes trainer sporting old-timers call things superb trainers likes RC As sist because smaller close-in flying fields can used needing compli cated launching apparatus no long walks retrieval fence climbing well remember Most turned esthetic purity model thermaling Which says very well indeed often have heard word penetration ability ship cleave through wind prized qual ity RC hardly factor case high-powered heavy clean pattern models pylon racers important much sport fly ing rudder-only days whence word penetration has inherited single-channel models seldom could make progress wind ballooned stalled galloped blew awayoften out sightas flier did damndest engine elevator control have made life half liveable gales blow Now fascinating letter Joe Tschirgo Letters pg 6 commenting Wischer column mak ing point lightly loaded scale models can fly win wind Both gents know what talking about isnt question wrong am right view point No wrong expect Bob will talking again ques tion What tickled us Joes general sertion fallacy light models cant fly wind Big smallengined load carriers flying empty like 6- 8-ft 09/15 have bested wind Ground turbulence might require quick stick work lightly loaded model stay keel once up can bore smoothly wind Proper balance trimming plus elevator trim control allow crank too much positive stab compensate wind decalage de creased sometimes point reaching negative pitching moment other words stab less effective countering increased wing CL creasing angles attack will stall before wing isnt say light airplane desirable wind dont mumble cant have penetra tion Tschirgi may first dare say recent AMA membership renew al period witnessed 20% increase number Open members take Model Aviation So second year row MA has increased its reader ship significant amount Over 75% AMA adult membership now take magazine No member required subscribe MA member has option declining magazine subscribing opts pays full subscription price because wants magazine pleased people find contents worthwhile wed like say Thank Letters Editor continued page 7 closing dollar cover postage etc am 34 year old veteran United Con tinued page 85 60 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8Ya-6% new Pylon Rac ing prop OUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale rn 1st CL Combat O & Sr let CL Slow Comb Op & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr let CLClassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st PP Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF 1st Formula Pylon 1st Ounrter Midget Pylon 1st CL Stunt Open let CL Stunt Senior let CL 5tunt Junior 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr Letters Editor continued page 60 States Air Force have building flying models since age 13 am enclosing picture planes built flown 1957 Richard Gardner Ft Worth TX AMA has sent Mr Gardner Club Kit Rule Book Membership Applica tion materials free anyone terested joining AMA Take Bow Walt would like take opportunity thank Walt Schoonard excellent column helicopters Model via tion magazine Im sure others will agree Walt has added greatly knowledge interested radio con trol helicopters has made sug gestions improving performance safety helicopters enjoy fly ing much Thank Walt Roger WMay College Place WA CORRECTION delighted presentation article About Size following errata captions describing photos did write reference triple redundant photographers camera required nail down critical spray peaks three dimensions three cameras indeed neces sary Skate model suspended rig balsa metal being carried rig mounted launch about 20 feet long fitted out purpose test being run Estuary small inlet San Diego Bay first paragraph page 11 sev eral places Time t expressed KS should read K Bradford Powers Schoolwork Fun/Warner continued page 12 ing site crashing least plane trying hard enough crash learning takes place stress need carefully ob serve flight Knowing whether plane crashed right spiral left spiral makes world difference what cor rective action take Hypothesize what caused problem test hypothesis making corrections before flying again repeat process try have ask watch first flights successive ones plane doing what should second-opinion method planes get flying better better last session inviting parents come out watch Results really impressive especially about 1000 am thermals start cooking off black-top return classroom critique after session go over common problems Some hardware have built class includes 1/4-hp wind machine demonstrating lift/drag control surfaces spiral propwash demonstrator prop unhooked model able turn freely its longitudinal axis moment-arm balance scale couple blow-between balls toilet-paper tube goodies Bernoulli effect old spooland-card trick thrust-measuring device show relationships between different props different size motors cansmash gallon can steam ping pong ball hair-dryer airstream lots flying demonstrators mentioned earlier product review product review product review ACE 25th Anniversary Catalogue over quarter centry ago Paul Runge founder proprietor ACEalong son Tom re cently Air Forcewas flying RC found like rest pioneer fliers parts almost impossible get Radio Shack Boston Commonplace items components could found big radio sup ply stores day requiring nationwide search such essentials National Coil Forms 3A4 3D6 tubes magnet wire Realizing others sharing problems Runge founded ACE R/C first small ad appearing May 1953 issue Air Trails first catalogue 2-sheet affair printed spirit duplicator new 72-pg ACE catalogue still offers hard-to-get parts also covers kits parts assembly modern reliable gear Contain ing vast array items catalogue costs $100 add 50c first class mail returnl $100 catalogue refundable first order ACE R/C Box 511G Higgins yule MO 64037 product review product review product review Such program can put together almost anywhere form another reasons succeeds well due support California Mu seum Foundation Gerry Richer Summer Science Workshop director give pretty much free hand plan class provide financial moral help Teachers picked because nuts about what doing love job well cant imagine someone being assigned teach class like As other kinds help lots super people will help people like Bill Hannan Art Guenther Tony Naccarato Frank Zaic over country Ask owe great deal model aviation passing some fun kids program can start repaying sides else can get paid playing toy airplanes Sources Supply Helium welding supply store LA 245 cuft bottle costs $35 gas wsth $70 deposit $390/mo rental balloon filler buy $28 Balloons California Toytime Balloon Co 1116 West 7th St San Pedro CA has Zeppelin balloons gross gross regular round balloons about $30 both JASCO X-18 JASCO Box 135 North ridge CA 91324 Ask fleet rate catalog Frank Zaic has other beginners kits too X-18 queen line has rubber too Sleek Streeks almost dime stores toy dealers no luck try manufacturer North Pacific Products Bend Oregon Retail late 1977 $59 ea have two kinds balsa styrofoam wing Take balsa Rubber winders Sterling Models 3620 GSt Philadelphia PA 19134 Brochure Summer Science Workshop winter Exploring Science Sat urdays program teach abridged version Aeroplanes Flying Ma chines class call Uncle Bills Fly ing Circus Available ESS/SSW California State Museum Science Industry 700 State Drive Los Angeles CA 90037 RC Technique/Myers continued page 14 fore brought out separate lead purpose may prefer adapter important thing remember positive lead Rapid charger con nects negative terminal exter nal battery Ive sketched out Fig 3 Fig 4 gives close look metered van-charger available kit ACE R/C Inc Box 511 Higgins ville MO 64037 son Tim 14 years old built about hour unit has MarCh1978 85 KA Jill 1$ ACE l/ inc 90X56W 9HS KGGNSV E MO 6403 99]
Edition: Model Aviation - 1978/03
Page Numbers: 6, 7, 60, 85
MIDWEST COMBAT Competitors EASY TO BUIIDmEASY TO FLY EASY TO WIN WITH Letters Editor letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Size article About Size Jan 78 very interesting enlightening However did notice minor error Q & position beginning #10 HO scale 1/87 1/96 answer cor rect accurate 1095 ft/sec Dick Gleason Austin MN can quote- author Brad Powers always thought 0 gauge trains quarter-scale /4 foot HO Half 0 called model train man said Dick Gleason correct apologies train gang Sacre Bleu Begs Differ Since Ive addicted World War scale models number years Bob Wischers remarks concerning RC scale December 77 issue Model Aviation disturb correct sessment Sport Scale becoming pattern event WW II fighters dead wrong implying lightly loaded models cannot competitive strong windsthey definitely flight judges will follow existing AMA rules Un fortunately experience familiar pattern events maneu vers judged rightly comparison absolute geometric perfec tion have apparently read scale rules clearly call judging maneuvers basis realism ie relation would performed real aircraft example few WW aircraft could slow aileron roll loss considerable altitude Similarly modern Immelmann turn bears little resemblance maneuvers per formed Lt Immelmann Clearly real ism also calls lightly loaded aircraft respond wind gusts Since remarks also observa tions 77 Nats less understandable judges ob viously well briefed CD Monty Groves would allow contestants elect maneuvers foreign aircraft modeled As result model Brandenberg W 18 flying boat scoring highest AMA scale flight about 1480 sq wing weighed slightly over 7 lbs some 11 oz per sq ft Furthermore flight made during windy part dayin fact model almost took off during proto taxi Bobs remarks also support com monly held belief light models very difficult fly breeze obviously easier model well trimmed has reasonable stability control characteristics particu larly difficult fly safely wind less its flying speed True doing geomet rically perfect smooth maneuvers un der such conditions next impossible light aircraft scale judges should take scale conditions account scoring myth light models difficult fly wind has genera ted observation rather personal experience rank novice invariably attracted light usually under-pow ered model Hence models type flown well observa tion grows conclusion cannot flown well observe what average pilots can light wing load ings has watch slope soaring sites loadings run low 8 10 oz per sq ft its always windy Yet average flyers will perform precision man euvers such touch-and-goes clifis edge frequently fly wind speed exceeds models minimum speed Im convinced within limits prac tical construction lighter scale model easier fly safely under conditions heavy model easily gets out hand low speedsoccasionally terminating flight involuntary snap rolland ground handling much difficult tail draggers Todays scale rules excellent implications followed per mit modeler wide choice subject resulting diversity attracts large numbers spectators scale meets hence popularizes hobby other hand pattern meets currently hold little spectator interest simply because youve seen youve seen Uniformity repetition spells boring health sport sincerely hope 78-79 rule book judges guide reinforce principles flight real ism specific instructions abandoned popular rapidly growing branch hobby will soon stagnate specialized event few experts similar control line racing Joe Tschirgi 6 Model Aviation EIIICELY Engine Sizes 15 19 Wing Span 3534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrat ed step-by-step plans Kit No 247 LIL SNIP Engine Size 049 Cu Wing Span 2534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated step-by-step plans two versions Kit No 246 MA IADOR Wing Span 42 control line combat model 35 engines Designed Rich Von Lopez Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated stepby-step planKit No 248 P miDwEST PRODUCTS CO (4 400 South Indiana St Hobart IndIana 46342 Santa Ana CA letter should carefully reread Joe seems disagreeing Bob Wischer main thrust reasoning concerns perception rules espe cially judges rules themselves considered opinion neither highly qualjfled gentlemen wrong additional comment will signi ficant appears Model Aviation Small World Maybe year ago friend Army showed model aviation magazine construction article about pat tern plane named Sequel Please let know name address designer can get plans airplane have October issue 77 magazine couldnt find plans list page 96 Please tell also back issue article about air plane available Karlheinz Schmid Augsburg W Germany Sequel published last sue American Aircraft Modeler magazine replaced R/C Sportsman has continued plan service Readers interested plans AAMwho keep writing us error should try R/C Sportsman PO Box 11247 Reno NV 89520 same day received Mr Schmids letter MA also heard Bud Weber designed Sequel hope publish ideas Wants am interested joining AMA could please tell procedure cost am interested control line flying process starting C/L club Ft Worth R/C club C/L Would please give some infor mation Rules Regulations etc regard ing phases C/L airplanes am enContinued page 60 TFox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line-Silicone-Is far strongest marketsemitransparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after ITEM FUEL UNEPRICEITEM FUEL UNEPnICE 86880 Small Neoprene2 Pkg.5086885 Small Clear Plastic2 Pkg.25 86881 Medium Nenprene2 P8g.6088886 Mediam Clear Plastic2 P8g.30 86882 Large Neoprene2 Pkg.7086887 Large Clear Plastic2 P8g.40 86883 Small Taft Line1 P8g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Taft Line1 Pkg7086889 Med Surgical Tubing2 P8g.50 86851 Large Taft Line1 Pkg10086890 Large Surgical Tubing2 P8g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thvo-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Products inc 779 EK-Products . . ch1978 7 SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE Et3489 63489 73344119 83%456129 945664 77%139 10467149 106W 8W149 106EW159 114877% 7% 7%8159 116EW169 11%67169 126179 125W179 1358219 1456249 1556309 18446389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B Poe SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HOLDER DF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755%6149 7SN 5/N 6N149 8%6%6%7 7%7%189 9647 747189 CONTROL LINE EED& RACING DIA PITCHPRICE 4%6%129 4%55%128 6788%149 77A10%11169 889189 89N 9%N189 8%77%189 912 13219 N NARROW Openers continued page 4 round beating out othersinclud ing two Open Class ships 15-minute round Ken could get down under 11-minute max no points rule 10-minute flight Incidentally Ken discovered inverted flight excellent way get Windlord out boomer So has proved flying wings can compete successfully sailplane competition Neil Liptaks plans Windlord collectors item MA just about despaired getting plans right glider-man Liptak came rescue nice Al Meyers engaged Liptak make magnificent plan pg 27 Mustang CL Sport-Scale/Stunter Alasfor us Neil about build house put away drawing pen guy would love fly Doc Mathews recently took over RC Old-Timers Jack Bolton business travels filled time does Doc grind out won derful old gassies flies high wide handsome enthusiasm would regenerate moribund Doc 45-year-old family dentist cant hurt us anymore Doc small farm ing community 2000 souls Galesburg KS wife Joann very pa tient lady Two sons Mark pre-law Senior Bruce HS Senior thinks world shaped like bas ketball Daughter Shelly sopho honor student engineering Both boys show up widespread FF contests Between men folk have garnered cabinet full trophies everything Indoor Doc has modeling since seven first flew O&R 23 Fireball got RC 1952 An avid competitor hes 11 Nats uncountable local meets within 400 miles first OT 3-channel Bombshell eight years ago describes trainer sporting old-timers call things superb trainers likes RC As sist because smaller close-in flying fields can used needing compli cated launching apparatus no long walks retrieval fence climbing well remember Most turned esthetic purity model thermaling Which says very well indeed often have heard word penetration ability ship cleave through wind prized qual ity RC hardly factor case high-powered heavy clean pattern models pylon racers important much sport fly ing rudder-only days whence word penetration has inherited single-channel models seldom could make progress wind ballooned stalled galloped blew awayoften out sightas flier did damndest engine elevator control have made life half liveable gales blow Now fascinating letter Joe Tschirgo Letters pg 6 commenting Wischer column mak ing point lightly loaded scale models can fly win wind Both gents know what talking about isnt question wrong am right view point No wrong expect Bob will talking again ques tion What tickled us Joes general sertion fallacy light models cant fly wind Big smallengined load carriers flying empty like 6- 8-ft 09/15 have bested wind Ground turbulence might require quick stick work lightly loaded model stay keel once up can bore smoothly wind Proper balance trimming plus elevator trim control allow crank too much positive stab compensate wind decalage de creased sometimes point reaching negative pitching moment other words stab less effective countering increased wing CL creasing angles attack will stall before wing isnt say light airplane desirable wind dont mumble cant have penetra tion Tschirgi may first dare say recent AMA membership renew al period witnessed 20% increase number Open members take Model Aviation So second year row MA has increased its reader ship significant amount Over 75% AMA adult membership now take magazine No member required subscribe MA member has option declining magazine subscribing opts pays full subscription price because wants magazine pleased people find contents worthwhile wed like say Thank Letters Editor continued page 7 closing dollar cover postage etc am 34 year old veteran United Con tinued page 85 60 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8Ya-6% new Pylon Rac ing prop OUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale rn 1st CL Combat O & Sr let CL Slow Comb Op & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr let CLClassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st PP Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF 1st Formula Pylon 1st Ounrter Midget Pylon 1st CL Stunt Open let CL Stunt Senior let CL 5tunt Junior 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr Letters Editor continued page 60 States Air Force have building flying models since age 13 am enclosing picture planes built flown 1957 Richard Gardner Ft Worth TX AMA has sent Mr Gardner Club Kit Rule Book Membership Applica tion materials free anyone terested joining AMA Take Bow Walt would like take opportunity thank Walt Schoonard excellent column helicopters Model via tion magazine Im sure others will agree Walt has added greatly knowledge interested radio con trol helicopters has made sug gestions improving performance safety helicopters enjoy fly ing much Thank Walt Roger WMay College Place WA CORRECTION delighted presentation article About Size following errata captions describing photos did write reference triple redundant photographers camera required nail down critical spray peaks three dimensions three cameras indeed neces sary Skate model suspended rig balsa metal being carried rig mounted launch about 20 feet long fitted out purpose test being run Estuary small inlet San Diego Bay first paragraph page 11 sev eral places Time t expressed KS should read K Bradford Powers Schoolwork Fun/Warner continued page 12 ing site crashing least plane trying hard enough crash learning takes place stress need carefully ob serve flight Knowing whether plane crashed right spiral left spiral makes world difference what cor rective action take Hypothesize what caused problem test hypothesis making corrections before flying again repeat process try have ask watch first flights successive ones plane doing what should second-opinion method planes get flying better better last session inviting parents come out watch Results really impressive especially about 1000 am thermals start cooking off black-top return classroom critique after session go over common problems Some hardware have built class includes 1/4-hp wind machine demonstrating lift/drag control surfaces spiral propwash demonstrator prop unhooked model able turn freely its longitudinal axis moment-arm balance scale couple blow-between balls toilet-paper tube goodies Bernoulli effect old spooland-card trick thrust-measuring device show relationships between different props different size motors cansmash gallon can steam ping pong ball hair-dryer airstream lots flying demonstrators mentioned earlier product review product review product review ACE 25th Anniversary Catalogue over quarter centry ago Paul Runge founder proprietor ACEalong son Tom re cently Air Forcewas flying RC found like rest pioneer fliers parts almost impossible get Radio Shack Boston Commonplace items components could found big radio sup ply stores day requiring nationwide search such essentials National Coil Forms 3A4 3D6 tubes magnet wire Realizing others sharing problems Runge founded ACE R/C first small ad appearing May 1953 issue Air Trails first catalogue 2-sheet affair printed spirit duplicator new 72-pg ACE catalogue still offers hard-to-get parts also covers kits parts assembly modern reliable gear Contain ing vast array items catalogue costs $100 add 50c first class mail returnl $100 catalogue refundable first order ACE R/C Box 511G Higgins yule MO 64037 product review product review product review Such program can put together almost anywhere form another reasons succeeds well due support California Mu seum Foundation Gerry Richer Summer Science Workshop director give pretty much free hand plan class provide financial moral help Teachers picked because nuts about what doing love job well cant imagine someone being assigned teach class like As other kinds help lots super people will help people like Bill Hannan Art Guenther Tony Naccarato Frank Zaic over country Ask owe great deal model aviation passing some fun kids program can start repaying sides else can get paid playing toy airplanes Sources Supply Helium welding supply store LA 245 cuft bottle costs $35 gas wsth $70 deposit $390/mo rental balloon filler buy $28 Balloons California Toytime Balloon Co 1116 West 7th St San Pedro CA has Zeppelin balloons gross gross regular round balloons about $30 both JASCO X-18 JASCO Box 135 North ridge CA 91324 Ask fleet rate catalog Frank Zaic has other beginners kits too X-18 queen line has rubber too Sleek Streeks almost dime stores toy dealers no luck try manufacturer North Pacific Products Bend Oregon Retail late 1977 $59 ea have two kinds balsa styrofoam wing Take balsa Rubber winders Sterling Models 3620 GSt Philadelphia PA 19134 Brochure Summer Science Workshop winter Exploring Science Sat urdays program teach abridged version Aeroplanes Flying Ma chines class call Uncle Bills Fly ing Circus Available ESS/SSW California State Museum Science Industry 700 State Drive Los Angeles CA 90037 RC Technique/Myers continued page 14 fore brought out separate lead purpose may prefer adapter important thing remember positive lead Rapid charger con nects negative terminal exter nal battery Ive sketched out Fig 3 Fig 4 gives close look metered van-charger available kit ACE R/C Inc Box 511 Higgins ville MO 64037 son Tim 14 years old built about hour unit has MarCh1978 85 KA Jill 1$ ACE l/ inc 90X56W 9HS KGGNSV E MO 6403 99]
Edition: Model Aviation - 1978/03
Page Numbers: 6, 7, 60, 85
MIDWEST COMBAT Competitors EASY TO BUIIDmEASY TO FLY EASY TO WIN WITH Letters Editor letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Size article About Size Jan 78 very interesting enlightening However did notice minor error Q & position beginning #10 HO scale 1/87 1/96 answer cor rect accurate 1095 ft/sec Dick Gleason Austin MN can quote- author Brad Powers always thought 0 gauge trains quarter-scale /4 foot HO Half 0 called model train man said Dick Gleason correct apologies train gang Sacre Bleu Begs Differ Since Ive addicted World War scale models number years Bob Wischers remarks concerning RC scale December 77 issue Model Aviation disturb correct sessment Sport Scale becoming pattern event WW II fighters dead wrong implying lightly loaded models cannot competitive strong windsthey definitely flight judges will follow existing AMA rules Un fortunately experience familiar pattern events maneu vers judged rightly comparison absolute geometric perfec tion have apparently read scale rules clearly call judging maneuvers basis realism ie relation would performed real aircraft example few WW aircraft could slow aileron roll loss considerable altitude Similarly modern Immelmann turn bears little resemblance maneuvers per formed Lt Immelmann Clearly real ism also calls lightly loaded aircraft respond wind gusts Since remarks also observa tions 77 Nats less understandable judges ob viously well briefed CD Monty Groves would allow contestants elect maneuvers foreign aircraft modeled As result model Brandenberg W 18 flying boat scoring highest AMA scale flight about 1480 sq wing weighed slightly over 7 lbs some 11 oz per sq ft Furthermore flight made during windy part dayin fact model almost took off during proto taxi Bobs remarks also support com monly held belief light models very difficult fly breeze obviously easier model well trimmed has reasonable stability control characteristics particu larly difficult fly safely wind less its flying speed True doing geomet rically perfect smooth maneuvers un der such conditions next impossible light aircraft scale judges should take scale conditions account scoring myth light models difficult fly wind has genera ted observation rather personal experience rank novice invariably attracted light usually under-pow ered model Hence models type flown well observa tion grows conclusion cannot flown well observe what average pilots can light wing load ings has watch slope soaring sites loadings run low 8 10 oz per sq ft its always windy Yet average flyers will perform precision man euvers such touch-and-goes clifis edge frequently fly wind speed exceeds models minimum speed Im convinced within limits prac tical construction lighter scale model easier fly safely under conditions heavy model easily gets out hand low speedsoccasionally terminating flight involuntary snap rolland ground handling much difficult tail draggers Todays scale rules excellent implications followed per mit modeler wide choice subject resulting diversity attracts large numbers spectators scale meets hence popularizes hobby other hand pattern meets currently hold little spectator interest simply because youve seen youve seen Uniformity repetition spells boring health sport sincerely hope 78-79 rule book judges guide reinforce principles flight real ism specific instructions abandoned popular rapidly growing branch hobby will soon stagnate specialized event few experts similar control line racing Joe Tschirgi 6 Model Aviation EIIICELY Engine Sizes 15 19 Wing Span 3534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrat ed step-by-step plans Kit No 247 LIL SNIP Engine Size 049 Cu Wing Span 2534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated step-by-step plans two versions Kit No 246 MA IADOR Wing Span 42 control line combat model 35 engines Designed Rich Von Lopez Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated stepby-step planKit No 248 P miDwEST PRODUCTS CO (4 400 South Indiana St Hobart IndIana 46342 Santa Ana CA letter should carefully reread Joe seems disagreeing Bob Wischer main thrust reasoning concerns perception rules espe cially judges rules themselves considered opinion neither highly qualjfled gentlemen wrong additional comment will signi ficant appears Model Aviation Small World Maybe year ago friend Army showed model aviation magazine construction article about pat tern plane named Sequel Please let know name address designer can get plans airplane have October issue 77 magazine couldnt find plans list page 96 Please tell also back issue article about air plane available Karlheinz Schmid Augsburg W Germany Sequel published last sue American Aircraft Modeler magazine replaced R/C Sportsman has continued plan service Readers interested plans AAMwho keep writing us error should try R/C Sportsman PO Box 11247 Reno NV 89520 same day received Mr Schmids letter MA also heard Bud Weber designed Sequel hope publish ideas Wants am interested joining AMA could please tell procedure cost am interested control line flying process starting C/L club Ft Worth R/C club C/L Would please give some infor mation Rules Regulations etc regard ing phases C/L airplanes am enContinued page 60 TFox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line-Silicone-Is far strongest marketsemitransparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after ITEM FUEL UNEPRICEITEM FUEL UNEPnICE 86880 Small Neoprene2 Pkg.5086885 Small Clear Plastic2 Pkg.25 86881 Medium Nenprene2 P8g.6088886 Mediam Clear Plastic2 P8g.30 86882 Large Neoprene2 Pkg.7086887 Large Clear Plastic2 P8g.40 86883 Small Taft Line1 P8g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Taft Line1 Pkg7086889 Med Surgical Tubing2 P8g.50 86851 Large Taft Line1 Pkg10086890 Large Surgical Tubing2 P8g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thvo-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Products inc 779 EK-Products . . ch1978 7 SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE Et3489 63489 73344119 83%456129 945664 77%139 10467149 106W 8W149 106EW159 114877% 7% 7%8159 116EW169 11%67169 126179 125W179 1358219 1456249 1556309 18446389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B Poe SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HOLDER DF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755%6149 7SN 5/N 6N149 8%6%6%7 7%7%189 9647 747189 CONTROL LINE EED& RACING DIA PITCHPRICE 4%6%129 4%55%128 6788%149 77A10%11169 889189 89N 9%N189 8%77%189 912 13219 N NARROW Openers continued page 4 round beating out othersinclud ing two Open Class ships 15-minute round Ken could get down under 11-minute max no points rule 10-minute flight Incidentally Ken discovered inverted flight excellent way get Windlord out boomer So has proved flying wings can compete successfully sailplane competition Neil Liptaks plans Windlord collectors item MA just about despaired getting plans right glider-man Liptak came rescue nice Al Meyers engaged Liptak make magnificent plan pg 27 Mustang CL Sport-Scale/Stunter Alasfor us Neil about build house put away drawing pen guy would love fly Doc Mathews recently took over RC Old-Timers Jack Bolton business travels filled time does Doc grind out won derful old gassies flies high wide handsome enthusiasm would regenerate moribund Doc 45-year-old family dentist cant hurt us anymore Doc small farm ing community 2000 souls Galesburg KS wife Joann very pa tient lady Two sons Mark pre-law Senior Bruce HS Senior thinks world shaped like bas ketball Daughter Shelly sopho honor student engineering Both boys show up widespread FF contests Between men folk have garnered cabinet full trophies everything Indoor Doc has modeling since seven first flew O&R 23 Fireball got RC 1952 An avid competitor hes 11 Nats uncountable local meets within 400 miles first OT 3-channel Bombshell eight years ago describes trainer sporting old-timers call things superb trainers likes RC As sist because smaller close-in flying fields can used needing compli cated launching apparatus no long walks retrieval fence climbing well remember Most turned esthetic purity model thermaling Which says very well indeed often have heard word penetration ability ship cleave through wind prized qual ity RC hardly factor case high-powered heavy clean pattern models pylon racers important much sport fly ing rudder-only days whence word penetration has inherited single-channel models seldom could make progress wind ballooned stalled galloped blew awayoften out sightas flier did damndest engine elevator control have made life half liveable gales blow Now fascinating letter Joe Tschirgo Letters pg 6 commenting Wischer column mak ing point lightly loaded scale models can fly win wind Both gents know what talking about isnt question wrong am right view point No wrong expect Bob will talking again ques tion What tickled us Joes general sertion fallacy light models cant fly wind Big smallengined load carriers flying empty like 6- 8-ft 09/15 have bested wind Ground turbulence might require quick stick work lightly loaded model stay keel once up can bore smoothly wind Proper balance trimming plus elevator trim control allow crank too much positive stab compensate wind decalage de creased sometimes point reaching negative pitching moment other words stab less effective countering increased wing CL creasing angles attack will stall before wing isnt say light airplane desirable wind dont mumble cant have penetra tion Tschirgi may first dare say recent AMA membership renew al period witnessed 20% increase number Open members take Model Aviation So second year row MA has increased its reader ship significant amount Over 75% AMA adult membership now take magazine No member required subscribe MA member has option declining magazine subscribing opts pays full subscription price because wants magazine pleased people find contents worthwhile wed like say Thank Letters Editor continued page 7 closing dollar cover postage etc am 34 year old veteran United Con tinued page 85 60 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8Ya-6% new Pylon Rac ing prop OUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale rn 1st CL Combat O & Sr let CL Slow Comb Op & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr let CLClassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st PP Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF 1st Formula Pylon 1st Ounrter Midget Pylon 1st CL Stunt Open let CL Stunt Senior let CL 5tunt Junior 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr Letters Editor continued page 60 States Air Force have building flying models since age 13 am enclosing picture planes built flown 1957 Richard Gardner Ft Worth TX AMA has sent Mr Gardner Club Kit Rule Book Membership Applica tion materials free anyone terested joining AMA Take Bow Walt would like take opportunity thank Walt Schoonard excellent column helicopters Model via tion magazine Im sure others will agree Walt has added greatly knowledge interested radio con trol helicopters has made sug gestions improving performance safety helicopters enjoy fly ing much Thank Walt Roger WMay College Place WA CORRECTION delighted presentation article About Size following errata captions describing photos did write reference triple redundant photographers camera required nail down critical spray peaks three dimensions three cameras indeed neces sary Skate model suspended rig balsa metal being carried rig mounted launch about 20 feet long fitted out purpose test being run Estuary small inlet San Diego Bay first paragraph page 11 sev eral places Time t expressed KS should read K Bradford Powers Schoolwork Fun/Warner continued page 12 ing site crashing least plane trying hard enough crash learning takes place stress need carefully ob serve flight Knowing whether plane crashed right spiral left spiral makes world difference what cor rective action take Hypothesize what caused problem test hypothesis making corrections before flying again repeat process try have ask watch first flights successive ones plane doing what should second-opinion method planes get flying better better last session inviting parents come out watch Results really impressive especially about 1000 am thermals start cooking off black-top return classroom critique after session go over common problems Some hardware have built class includes 1/4-hp wind machine demonstrating lift/drag control surfaces spiral propwash demonstrator prop unhooked model able turn freely its longitudinal axis moment-arm balance scale couple blow-between balls toilet-paper tube goodies Bernoulli effect old spooland-card trick thrust-measuring device show relationships between different props different size motors cansmash gallon can steam ping pong ball hair-dryer airstream lots flying demonstrators mentioned earlier product review product review product review ACE 25th Anniversary Catalogue over quarter centry ago Paul Runge founder proprietor ACEalong son Tom re cently Air Forcewas flying RC found like rest pioneer fliers parts almost impossible get Radio Shack Boston Commonplace items components could found big radio sup ply stores day requiring nationwide search such essentials National Coil Forms 3A4 3D6 tubes magnet wire Realizing others sharing problems Runge founded ACE R/C first small ad appearing May 1953 issue Air Trails first catalogue 2-sheet affair printed spirit duplicator new 72-pg ACE catalogue still offers hard-to-get parts also covers kits parts assembly modern reliable gear Contain ing vast array items catalogue costs $100 add 50c first class mail returnl $100 catalogue refundable first order ACE R/C Box 511G Higgins yule MO 64037 product review product review product review Such program can put together almost anywhere form another reasons succeeds well due support California Mu seum Foundation Gerry Richer Summer Science Workshop director give pretty much free hand plan class provide financial moral help Teachers picked because nuts about what doing love job well cant imagine someone being assigned teach class like As other kinds help lots super people will help people like Bill Hannan Art Guenther Tony Naccarato Frank Zaic over country Ask owe great deal model aviation passing some fun kids program can start repaying sides else can get paid playing toy airplanes Sources Supply Helium welding supply store LA 245 cuft bottle costs $35 gas wsth $70 deposit $390/mo rental balloon filler buy $28 Balloons California Toytime Balloon Co 1116 West 7th St San Pedro CA has Zeppelin balloons gross gross regular round balloons about $30 both JASCO X-18 JASCO Box 135 North ridge CA 91324 Ask fleet rate catalog Frank Zaic has other beginners kits too X-18 queen line has rubber too Sleek Streeks almost dime stores toy dealers no luck try manufacturer North Pacific Products Bend Oregon Retail late 1977 $59 ea have two kinds balsa styrofoam wing Take balsa Rubber winders Sterling Models 3620 GSt Philadelphia PA 19134 Brochure Summer Science Workshop winter Exploring Science Sat urdays program teach abridged version Aeroplanes Flying Ma chines class call Uncle Bills Fly ing Circus Available ESS/SSW California State Museum Science Industry 700 State Drive Los Angeles CA 90037 RC Technique/Myers continued page 14 fore brought out separate lead purpose may prefer adapter important thing remember positive lead Rapid charger con nects negative terminal exter nal battery Ive sketched out Fig 3 Fig 4 gives close look metered van-charger available kit ACE R/C Inc Box 511 Higgins ville MO 64037 son Tim 14 years old built about hour unit has MarCh1978 85 KA Jill 1$ ACE l/ inc 90X56W 9HS KGGNSV E MO 6403 99]
Edition: Model Aviation - 1978/03
Page Numbers: 6, 7, 60, 85
MIDWEST COMBAT Competitors EASY TO BUIIDmEASY TO FLY EASY TO WIN WITH Letters Editor letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Size article About Size Jan 78 very interesting enlightening However did notice minor error Q & position beginning #10 HO scale 1/87 1/96 answer cor rect accurate 1095 ft/sec Dick Gleason Austin MN can quote- author Brad Powers always thought 0 gauge trains quarter-scale /4 foot HO Half 0 called model train man said Dick Gleason correct apologies train gang Sacre Bleu Begs Differ Since Ive addicted World War scale models number years Bob Wischers remarks concerning RC scale December 77 issue Model Aviation disturb correct sessment Sport Scale becoming pattern event WW II fighters dead wrong implying lightly loaded models cannot competitive strong windsthey definitely flight judges will follow existing AMA rules Un fortunately experience familiar pattern events maneu vers judged rightly comparison absolute geometric perfec tion have apparently read scale rules clearly call judging maneuvers basis realism ie relation would performed real aircraft example few WW aircraft could slow aileron roll loss considerable altitude Similarly modern Immelmann turn bears little resemblance maneuvers per formed Lt Immelmann Clearly real ism also calls lightly loaded aircraft respond wind gusts Since remarks also observa tions 77 Nats less understandable judges ob viously well briefed CD Monty Groves would allow contestants elect maneuvers foreign aircraft modeled As result model Brandenberg W 18 flying boat scoring highest AMA scale flight about 1480 sq wing weighed slightly over 7 lbs some 11 oz per sq ft Furthermore flight made during windy part dayin fact model almost took off during proto taxi Bobs remarks also support com monly held belief light models very difficult fly breeze obviously easier model well trimmed has reasonable stability control characteristics particu larly difficult fly safely wind less its flying speed True doing geomet rically perfect smooth maneuvers un der such conditions next impossible light aircraft scale judges should take scale conditions account scoring myth light models difficult fly wind has genera ted observation rather personal experience rank novice invariably attracted light usually under-pow ered model Hence models type flown well observa tion grows conclusion cannot flown well observe what average pilots can light wing load ings has watch slope soaring sites loadings run low 8 10 oz per sq ft its always windy Yet average flyers will perform precision man euvers such touch-and-goes clifis edge frequently fly wind speed exceeds models minimum speed Im convinced within limits prac tical construction lighter scale model easier fly safely under conditions heavy model easily gets out hand low speedsoccasionally terminating flight involuntary snap rolland ground handling much difficult tail draggers Todays scale rules excellent implications followed per mit modeler wide choice subject resulting diversity attracts large numbers spectators scale meets hence popularizes hobby other hand pattern meets currently hold little spectator interest simply because youve seen youve seen Uniformity repetition spells boring health sport sincerely hope 78-79 rule book judges guide reinforce principles flight real ism specific instructions abandoned popular rapidly growing branch hobby will soon stagnate specialized event few experts similar control line racing Joe Tschirgi 6 Model Aviation EIIICELY Engine Sizes 15 19 Wing Span 3534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrat ed step-by-step plans Kit No 247 LIL SNIP Engine Size 049 Cu Wing Span 2534 Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated step-by-step plans two versions Kit No 246 MA IADOR Wing Span 42 control line combat model 35 engines Designed Rich Von Lopez Kit contains Die cut balsa plywood parts wire hardware tank fully illustrated stepby-step planKit No 248 P miDwEST PRODUCTS CO (4 400 South Indiana St Hobart IndIana 46342 Santa Ana CA letter should carefully reread Joe seems disagreeing Bob Wischer main thrust reasoning concerns perception rules espe cially judges rules themselves considered opinion neither highly qualjfled gentlemen wrong additional comment will signi ficant appears Model Aviation Small World Maybe year ago friend Army showed model aviation magazine construction article about pat tern plane named Sequel Please let know name address designer can get plans airplane have October issue 77 magazine couldnt find plans list page 96 Please tell also back issue article about air plane available Karlheinz Schmid Augsburg W Germany Sequel published last sue American Aircraft Modeler magazine replaced R/C Sportsman has continued plan service Readers interested plans AAMwho keep writing us error should try R/C Sportsman PO Box 11247 Reno NV 89520 same day received Mr Schmids letter MA also heard Bud Weber designed Sequel hope publish ideas Wants am interested joining AMA could please tell procedure cost am interested control line flying process starting C/L club Ft Worth R/C club C/L Would please give some infor mation Rules Regulations etc regard ing phases C/L airplanes am enContinued page 60 TFox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line-Silicone-Is far strongest marketsemitransparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after ITEM FUEL UNEPRICEITEM FUEL UNEPnICE 86880 Small Neoprene2 Pkg.5086885 Small Clear Plastic2 Pkg.25 86881 Medium Nenprene2 P8g.6088886 Mediam Clear Plastic2 P8g.30 86882 Large Neoprene2 Pkg.7086887 Large Clear Plastic2 P8g.40 86883 Small Taft Line1 P8g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Taft Line1 Pkg7086889 Med Surgical Tubing2 P8g.50 86851 Large Taft Line1 Pkg10086890 Large Surgical Tubing2 P8g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thvo-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Products inc 779 EK-Products . . ch1978 7 SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE Et3489 63489 73344119 83%456129 945664 77%139 10467149 106W 8W149 106EW159 114877% 7% 7%8159 116EW169 11%67169 126179 125W179 1358219 1456249 1556309 18446389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B Poe SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HOLDER DF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755%6149 7SN 5/N 6N149 8%6%6%7 7%7%189 9647 747189 CONTROL LINE EED& RACING DIA PITCHPRICE 4%6%129 4%55%128 6788%149 77A10%11169 889189 89N 9%N189 8%77%189 912 13219 N NARROW Openers continued page 4 round beating out othersinclud ing two Open Class ships 15-minute round Ken could get down under 11-minute max no points rule 10-minute flight Incidentally Ken discovered inverted flight excellent way get Windlord out boomer So has proved flying wings can compete successfully sailplane competition Neil Liptaks plans Windlord collectors item MA just about despaired getting plans right glider-man Liptak came rescue nice Al Meyers engaged Liptak make magnificent plan pg 27 Mustang CL Sport-Scale/Stunter Alasfor us Neil about build house put away drawing pen guy would love fly Doc Mathews recently took over RC Old-Timers Jack Bolton business travels filled time does Doc grind out won derful old gassies flies high wide handsome enthusiasm would regenerate moribund Doc 45-year-old family dentist cant hurt us anymore Doc small farm ing community 2000 souls Galesburg KS wife Joann very pa tient lady Two sons Mark pre-law Senior Bruce HS Senior thinks world shaped like bas ketball Daughter Shelly sopho honor student engineering Both boys show up widespread FF contests Between men folk have garnered cabinet full trophies everything Indoor Doc has modeling since seven first flew O&R 23 Fireball got RC 1952 An avid competitor hes 11 Nats uncountable local meets within 400 miles first OT 3-channel Bombshell eight years ago describes trainer sporting old-timers call things superb trainers likes RC As sist because smaller close-in flying fields can used needing compli cated launching apparatus no long walks retrieval fence climbing well remember Most turned esthetic purity model thermaling Which says very well indeed often have heard word penetration ability ship cleave through wind prized qual ity RC hardly factor case high-powered heavy clean pattern models pylon racers important much sport fly ing rudder-only days whence word penetration has inherited single-channel models seldom could make progress wind ballooned stalled galloped blew awayoften out sightas flier did damndest engine elevator control have made life half liveable gales blow Now fascinating letter Joe Tschirgo Letters pg 6 commenting Wischer column mak ing point lightly loaded scale models can fly win wind Both gents know what talking about isnt question wrong am right view point No wrong expect Bob will talking again ques tion What tickled us Joes general sertion fallacy light models cant fly wind Big smallengined load carriers flying empty like 6- 8-ft 09/15 have bested wind Ground turbulence might require quick stick work lightly loaded model stay keel once up can bore smoothly wind Proper balance trimming plus elevator trim control allow crank too much positive stab compensate wind decalage de creased sometimes point reaching negative pitching moment other words stab less effective countering increased wing CL creasing angles attack will stall before wing isnt say light airplane desirable wind dont mumble cant have penetra tion Tschirgi may first dare say recent AMA membership renew al period witnessed 20% increase number Open members take Model Aviation So second year row MA has increased its reader ship significant amount Over 75% AMA adult membership now take magazine No member required subscribe MA member has option declining magazine subscribing opts pays full subscription price because wants magazine pleased people find contents worthwhile wed like say Thank Letters Editor continued page 7 closing dollar cover postage etc am 34 year old veteran United Con tinued page 85 60 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula 11125 RevUp 8Ya-6% new Pylon Rac ing prop OUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale rn 1st CL Combat O & Sr let CL Slow Comb Op & Sr 1st CL Class 0 Speed Open 1st CL Class C Speed Jr & Sr let CLClassB Speed Op & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st PP Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF 1st Formula Pylon 1st Ounrter Midget Pylon 1st CL Stunt Open let CL Stunt Senior let CL 5tunt Junior 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr Letters Editor continued page 60 States Air Force have building flying models since age 13 am enclosing picture planes built flown 1957 Richard Gardner Ft Worth TX AMA has sent Mr Gardner Club Kit Rule Book Membership Applica tion materials free anyone terested joining AMA Take Bow Walt would like take opportunity thank Walt Schoonard excellent column helicopters Model via tion magazine Im sure others will agree Walt has added greatly knowledge interested radio con trol helicopters has made sug gestions improving performance safety helicopters enjoy fly ing much Thank Walt Roger WMay College Place WA CORRECTION delighted presentation article About Size following errata captions describing photos did write reference triple redundant photographers camera required nail down critical spray peaks three dimensions three cameras indeed neces sary Skate model suspended rig balsa metal being carried rig mounted launch about 20 feet long fitted out purpose test being run Estuary small inlet San Diego Bay first paragraph page 11 sev eral places Time t expressed KS should read K Bradford Powers Schoolwork Fun/Warner continued page 12 ing site crashing least plane trying hard enough crash learning takes place stress need carefully ob serve flight Knowing whether plane crashed right spiral left spiral makes world difference what cor rective action take Hypothesize what caused problem test hypothesis making corrections before flying again repeat process try have ask watch first flights successive ones plane doing what should second-opinion method planes get flying better better last session inviting parents come out watch Results really impressive especially about 1000 am thermals start cooking off black-top return classroom critique after session go over common problems Some hardware have built class includes 1/4-hp wind machine demonstrating lift/drag control surfaces spiral propwash demonstrator prop unhooked model able turn freely its longitudinal axis moment-arm balance scale couple blow-between balls toilet-paper tube goodies Bernoulli effect old spooland-card trick thrust-measuring device show relationships between different props different size motors cansmash gallon can steam ping pong ball hair-dryer airstream lots flying demonstrators mentioned earlier product review product review product review ACE 25th Anniversary Catalogue over quarter centry ago Paul Runge founder proprietor ACEalong son Tom re cently Air Forcewas flying RC found like rest pioneer fliers parts almost impossible get Radio Shack Boston Commonplace items components could found big radio sup ply stores day requiring nationwide search such essentials National Coil Forms 3A4 3D6 tubes magnet wire Realizing others sharing problems Runge founded ACE R/C first small ad appearing May 1953 issue Air Trails first catalogue 2-sheet affair printed spirit duplicator new 72-pg ACE catalogue still offers hard-to-get parts also covers kits parts assembly modern reliable gear Contain ing vast array items catalogue costs $100 add 50c first class mail returnl $100 catalogue refundable first order ACE R/C Box 511G Higgins yule MO 64037 product review product review product review Such program can put together almost anywhere form another reasons succeeds well due support California Mu seum Foundation Gerry Richer Summer Science Workshop director give pretty much free hand plan class provide financial moral help Teachers picked because nuts about what doing love job well cant imagine someone being assigned teach class like As other kinds help lots super people will help people like Bill Hannan Art Guenther Tony Naccarato Frank Zaic over country Ask owe great deal model aviation passing some fun kids program can start repaying sides else can get paid playing toy airplanes Sources Supply Helium welding supply store LA 245 cuft bottle costs $35 gas wsth $70 deposit $390/mo rental balloon filler buy $28 Balloons California Toytime Balloon Co 1116 West 7th St San Pedro CA has Zeppelin balloons gross gross regular round balloons about $30 both JASCO X-18 JASCO Box 135 North ridge CA 91324 Ask fleet rate catalog Frank Zaic has other beginners kits too X-18 queen line has rubber too Sleek Streeks almost dime stores toy dealers no luck try manufacturer North Pacific Products Bend Oregon Retail late 1977 $59 ea have two kinds balsa styrofoam wing Take balsa Rubber winders Sterling Models 3620 GSt Philadelphia PA 19134 Brochure Summer Science Workshop winter Exploring Science Sat urdays program teach abridged version Aeroplanes Flying Ma chines class call Uncle Bills Fly ing Circus Available ESS/SSW California State Museum Science Industry 700 State Drive Los Angeles CA 90037 RC Technique/Myers continued page 14 fore brought out separate lead purpose may prefer adapter important thing remember positive lead Rapid charger con nects negative terminal exter nal battery Ive sketched out Fig 3 Fig 4 gives close look metered van-charger available kit ACE R/C Inc Box 511 Higgins ville MO 64037 son Tim 14 years old built about hour unit has MarCh1978 85 KA Jill 1$ ACE l/ inc 90X56W 9HS KGGNSV E MO 6403 99]