HEADS UP aint got Crunch Now turn off transmitter collapse antenna walk slowly crash site. right Wrong Leave transmitter tenna extended airborne unit still operating transmitters signal will keep servos centered turn off transmitter take chance having some other signal drive servos hard against stops thereby destroying what otherwise crash survivor Now scene first thing stir sticks see receiver still working Another mistake Leave testing later now disconnect airborne battery pack taking care get bad burn wires should shortcircuit occur somewhere turn off transmitter Carefully pick up everything Todays fast adhesives allow restore prac tically airframe damage As radio little things like servo mounting hardware output wheels frequently hardest find need Time saved cleanup activity trans lates expense later Rack pits pieces laid out inspection its time discover cause crash Never assume cause prove may simply lost control through inexperience again may seem way well remember experienced flier thought departure stall snaproll crash due unfamiliarity new plane until bystander noticed output meter transmitter read zero Everybody knows meters dont mean anything everybody ig nores Except meter case telling him transmitter wasnt radiating Transmitters rarely rail game over should check interference radio isnt working First check Get clip back neces sary turn transmitter look meter have access field-strength meter use cross-check transmitter output cases can put transmitter antenna near port able AM receiver listen trans mitter can tell channels working listening change sound move control time Tune around until hear brrrr changes move sticks Second check Separate airborne pack individual units carry tooth brush field kit preliminary clean-up Inspect cases damage battery receiver servos switch harness Next check wires breaks Grasp servo output wheel try turn systems have such high mechanical advantage gear train cant normally can move now youve got concealed damage opposite also true cant move could before have warning open up servo case internal inspection before connect receiver again Jammed gears can blow out amplifier just few seconds Third check Plug battery pack some kind tester use Astro Flight Inc R/C System Analyzer-Rapid Charger because have it works both tests recharges batteries bunch other products can use point use something Find out per haps cells pack have 22 Model Aviation Fig 1 can tell transmitter radiating signal 1 Look meter 2 Clip RS Systems RFM form field-atrengtn meter7 3 Listen Brrr portable radio 4 Look indication fieldatrength meter 5 Look white bars TV screen gone bad Its known happen Fourth check Assuming have identified least servo seems undamaged further assuming battery pack useable substitute available assemble both receiver turn transmitter may seems normal normal ground range check may find receiver works transmitter antenna ex tended up close col lapsed away normal groundcheck distance indicates cracked crystal receiver Crystals frequently break crashes receiver seems completely inoperative wrap receiver antenna loosely around middle extended transmitter antenna Try again re ceiver works virtually proof need diagnose broken crystal youve got some other kind problem Perhaps servo really isnt working Try another now should have pretty good idea what caused crash system still working after abuse usually something else caused crash Perhaps wing floated away itself just before fuselage began its final dive did happen cant find exact cause leave yourself wide open repetition problem next time fly Some people learn fly almost im mediately others never learn Admittedly people different Some lack basic drive succeed may Ive yet meet first person really cant learn fly given right equipment training People keep crashing motivated learn What need better equip ment purpose learning better instruction point life Ive seen variations basic theme motorized flying cross radio Im willing concede virtually anything will fly some fly better others Which leads quickest learning thats real question Begin 4-channel radio Getting familiar feel transmitter half battle Folks begin cheap 2-channel radio has stick side moves up-down stick other side moves left-right can learn fly way teach themselves set reactions will have unlearned before can make progress standard 4-channel radio 4-function airplane Begin 4-function airplane prefer ably someone elses clubs have gone club trainer owned operated club-certified instructors Carl Gold bergs Falcon 56 often used Fledgling fine way learn since plane operated fashion Fig 5 Few iOOSG wraps OT reuvur ai,,i5 shown sit needed overcome broken likely properly balanced trimmed crystal put system back operation George describes simple tests doubtful crystai September1979 23 wheel pants canopies etc works home oven hose type vacuum cleaner FOECAT@R MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC PLASTICBulk Pack Vacuum former piastics ASS PIAlw Sheets foe Form alto Easy make own cowlsAllah Btho17 Packs Only PCSPACK THICKNESS PER PACK PRICE 0201/50301300 030 1132201300 045 3/64131300 0601/16101300 0903/3261300 Assortment Pack see below 1300 Aootowt Pooh no0300 0020/ *oa%3.o45 2550/ 000 1000 ohot. y pooh p12 0000 oOwd wilt Fowtoto ALL AM S winE Over 3/ Lbs per pack Idea Development Inc ox 7399 rk Delaware 19711 Instructions assembly & use Included $39 Lincludes A88t Pack ABS SHIPPED PREPAID 9VIA UPS US ONLY dealer order direct Qualified Dealer Inquiries Invited new ruleasos Bucker ITTTMEISTER radio control lwingspan Seagulltor rubber available soon C 02 power SEE YOURsend 254 DEALER NOWcatalog FLYLINE MODELS INC 2820 DORA AVENUE RIO FAIRFAX VIRON2 22031703 RIO 2238 ANNOUNCING Post Stoop Climb FLat Slow Glide 4 new P 30 class model designed novice mind ond has potential won toughest THE POTENT30 Deluxe kit leatures include Rolled balsa lusela no ond wing mount dl Completed prop d nose plug tail plug & rudder Precut wing ribs spar notches job rated balsa strips Highest quality tissue lubed contest rubber Detailed instructionsfiying tips help win CAT NO R2 Sees pp check money order CHAS WERLE 3620 MORSE AVE NOS SACTO CALIF 95821 Cleveland Races/Berliner continued tram page 21 builders mechanics prepared enter much serious race ofthe airplanes ever raced again Turners two-time Thompson-winning Meteor now display Washing tons National Air & Space Museum LeViers Firecracker exists pieces California Chesters Goon complete West Coast doesnt fly Earl Ortmans Marcoux Bromberg finally being restored Connecticut Wittmans Bonzo EAA Mu seum near Milwaukee Most others just seemed disappear though few enthusiasts continue try follow up faint leads pilots few went race briefly after war Wittman stuck racing career stood 52 words being written end yet sight other pre-war racing name remains competitive Harold Neumann winner 1935 Thompson Greve Races regularly places well aerobatic contests Monocoupe painted just like old racer called Harolds Little Mulligan Thanks Golden Age Air Racing still alive thanks too memories others continued RC Technique/Myers continued page 23 field face new situation either because last time out told go home make some kind change because minor accident resulted some rebuilding change airplanes characteris tics As result waste air-time fighting plane instead learning new maneuvers Begin Ground School proper ground school session deals what student supposed learn ground demonstrate air particular day Learning has planned experience order have rapid progress Air time should limited maximum four minutes per flight until student ready solo Very few beginners can go longer two minutes during first 10 sessions get behind become desperate trying catch up Learning ceases Long flights early learning teach bad habit reacting airplane instead leading around sky Work plan student should have copy training plan pocket Before ground school begins whip out training plan discuss instruc tor parts already covered Agree what next step will before starting ground school session approach keeps starting over begin ning time meet new instructor club doesnt already have training plan syllabus might try 1 Demonstration 4 controlfunc dons Instructor emphasizes control stick position proportional rate roll pitch yaw angle airplane flies 2 Racetrack straight out back student learns about apparent control reversal hell make lot circles far end course 3 Racetrack other way plus loop Get over loop pre pared Half beginners will Fig ure 9 4 S-turns going out straight flight back works best can use runway ground reference keeping left- right-hand turns equal Never mind wind concentrate keeping altitude constant Teaches coordination 5 Spin recovery instructor puts plane spin student gets out Spin recognition what important 6 Inverted Racetrack now student should making own takeoffs Get him inverted before has chance afraid may also demonstrate really learned 5 should make point instructor looking demonstration fact student understands what wanted trying 106 Model Aviation great schoolyard scale TRAVEL AIR 020 ruboe power 36 span 12 channel R/C tree flight 51495 looking forperfection want see student flying airplane vice-versa 7 Landing pattern Start high 200 feet work down plan land Plan make airplane go supposed reference runway local obstructions Go up again 8 Landings plane properly trimmed will land itself have steer runway 9 Solo fast learner will get point afternoon instructor has time spend him supervised solo doesnt mean student ready go off himself unattended means student has mastered basics now ready learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Scale/Wischers continued page 32 gusty winds Saturday air ground handling PE-2 excellent Modelers WW LI training planes may remember anti-spin strakes used some deHavilland Tiger Moths forward extensions horizontal stabilizer joins fuselage purpose being correction tendency flat spin Anti-spin strakes have reappeared Beech T-34 turboprop trainer model plane flown third place Bud Atkinson Buds Beech added nose length turboprop plane ideally proportioned modeling new plane made three flights before contest Bud yet determined effectiveness strakes Hank Pohlman again flown Iowa Cessna 172 Skyhawk carrying 65-in model Hawk specially constructed luggage compartment must ultimate scale documentation Victim high wind its first round flight hastily repaired ubiquitous instant glue going win first place Expert Division IL Hanks Skyhawk will released Sig kit later year complete foam wing formed molded ABS fuselage cowl pants windows corru gated control surfaces quarter-scale scratch-built Aeronca C-3 four Florida entrants Mario Yeder linics C-3 flown 0 S Max 60 fourcycle engine came surprisingly close authentic sound two-cylinder Aeronca E 113 engine apparent slow pace C-3 added considerably realism flight combin ing its high static score gain first place Sportsman Division II Mario also flew Hawker Hurricane Division Art Johnson also made thousand mile trip Florida renowned Lockheed P-38 Lightning Art sealed joints points P-38 assembled give plane overall smooth exterior large model needed transported piece just barely fitting capacious station wagon popularity Arts plane best evidenced spectator contestant reaction flies Absolutely everyone watches complete flight special attention instant droppable fuel tanks deployed Apair OS Max 60 Schnuerle engines supply energy Tip Stalls Again February column de scribed method preventing tip stalls tapered wing greater percentage thick ness toward tip Dan Parsons writes agree what said have question recommended methods preven ting tip stall increase percentage wing thickness tip over root have seen suggested over years other modelers wonder idea came According studies airfoil lift curves section lift coefficient vs section angle attack Theory Wing Sections Abbott Doenhoff just opposite technique should employed percentage wing thickness tip should decreased over root reason being type airfoils com monly used modelers 12% airfoil stalls higher angle attack 15% Thus wing tapering 15% root 12% tip have built washout having warp wing following table illus trates NACA * Stall Angle Max Lift Cocif 24121516 2415 2421 4412 4415 23012 23015 23024 14 14 13 12 165 15 14 14 125 152 143 162 153 120 As will note max lift coefficient also higher 12% thickness years modelers have thought thicker airfoil lift Taint according curves least September 1979 107
Edition: Model Aviation - 1979/09
Page Numbers: 22, 23, 106, 107
HEADS UP aint got Crunch Now turn off transmitter collapse antenna walk slowly crash site. right Wrong Leave transmitter tenna extended airborne unit still operating transmitters signal will keep servos centered turn off transmitter take chance having some other signal drive servos hard against stops thereby destroying what otherwise crash survivor Now scene first thing stir sticks see receiver still working Another mistake Leave testing later now disconnect airborne battery pack taking care get bad burn wires should shortcircuit occur somewhere turn off transmitter Carefully pick up everything Todays fast adhesives allow restore prac tically airframe damage As radio little things like servo mounting hardware output wheels frequently hardest find need Time saved cleanup activity trans lates expense later Rack pits pieces laid out inspection its time discover cause crash Never assume cause prove may simply lost control through inexperience again may seem way well remember experienced flier thought departure stall snaproll crash due unfamiliarity new plane until bystander noticed output meter transmitter read zero Everybody knows meters dont mean anything everybody ig nores Except meter case telling him transmitter wasnt radiating Transmitters rarely rail game over should check interference radio isnt working First check Get clip back neces sary turn transmitter look meter have access field-strength meter use cross-check transmitter output cases can put transmitter antenna near port able AM receiver listen trans mitter can tell channels working listening change sound move control time Tune around until hear brrrr changes move sticks Second check Separate airborne pack individual units carry tooth brush field kit preliminary clean-up Inspect cases damage battery receiver servos switch harness Next check wires breaks Grasp servo output wheel try turn systems have such high mechanical advantage gear train cant normally can move now youve got concealed damage opposite also true cant move could before have warning open up servo case internal inspection before connect receiver again Jammed gears can blow out amplifier just few seconds Third check Plug battery pack some kind tester use Astro Flight Inc R/C System Analyzer-Rapid Charger because have it works both tests recharges batteries bunch other products can use point use something Find out per haps cells pack have 22 Model Aviation Fig 1 can tell transmitter radiating signal 1 Look meter 2 Clip RS Systems RFM form field-atrengtn meter7 3 Listen Brrr portable radio 4 Look indication fieldatrength meter 5 Look white bars TV screen gone bad Its known happen Fourth check Assuming have identified least servo seems undamaged further assuming battery pack useable substitute available assemble both receiver turn transmitter may seems normal normal ground range check may find receiver works transmitter antenna ex tended up close col lapsed away normal groundcheck distance indicates cracked crystal receiver Crystals frequently break crashes receiver seems completely inoperative wrap receiver antenna loosely around middle extended transmitter antenna Try again re ceiver works virtually proof need diagnose broken crystal youve got some other kind problem Perhaps servo really isnt working Try another now should have pretty good idea what caused crash system still working after abuse usually something else caused crash Perhaps wing floated away itself just before fuselage began its final dive did happen cant find exact cause leave yourself wide open repetition problem next time fly Some people learn fly almost im mediately others never learn Admittedly people different Some lack basic drive succeed may Ive yet meet first person really cant learn fly given right equipment training People keep crashing motivated learn What need better equip ment purpose learning better instruction point life Ive seen variations basic theme motorized flying cross radio Im willing concede virtually anything will fly some fly better others Which leads quickest learning thats real question Begin 4-channel radio Getting familiar feel transmitter half battle Folks begin cheap 2-channel radio has stick side moves up-down stick other side moves left-right can learn fly way teach themselves set reactions will have unlearned before can make progress standard 4-channel radio 4-function airplane Begin 4-function airplane prefer ably someone elses clubs have gone club trainer owned operated club-certified instructors Carl Gold bergs Falcon 56 often used Fledgling fine way learn since plane operated fashion Fig 5 Few iOOSG wraps OT reuvur ai,,i5 shown sit needed overcome broken likely properly balanced trimmed crystal put system back operation George describes simple tests doubtful crystai September1979 23 wheel pants canopies etc works home oven hose type vacuum cleaner FOECAT@R MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC PLASTICBulk Pack Vacuum former piastics ASS PIAlw Sheets foe Form alto Easy make own cowlsAllah Btho17 Packs Only PCSPACK THICKNESS PER PACK PRICE 0201/50301300 030 1132201300 045 3/64131300 0601/16101300 0903/3261300 Assortment Pack see below 1300 Aootowt Pooh no0300 0020/ *oa%3.o45 2550/ 000 1000 ohot. y pooh p12 0000 oOwd wilt Fowtoto ALL AM S winE Over 3/ Lbs per pack Idea Development Inc ox 7399 rk Delaware 19711 Instructions assembly & use Included $39 Lincludes A88t Pack ABS SHIPPED PREPAID 9VIA UPS US ONLY dealer order direct Qualified Dealer Inquiries Invited new ruleasos Bucker ITTTMEISTER radio control lwingspan Seagulltor rubber available soon C 02 power SEE YOURsend 254 DEALER NOWcatalog FLYLINE MODELS INC 2820 DORA AVENUE RIO FAIRFAX VIRON2 22031703 RIO 2238 ANNOUNCING Post Stoop Climb FLat Slow Glide 4 new P 30 class model designed novice mind ond has potential won toughest THE POTENT30 Deluxe kit leatures include Rolled balsa lusela no ond wing mount dl Completed prop d nose plug tail plug & rudder Precut wing ribs spar notches job rated balsa strips Highest quality tissue lubed contest rubber Detailed instructionsfiying tips help win CAT NO R2 Sees pp check money order CHAS WERLE 3620 MORSE AVE NOS SACTO CALIF 95821 Cleveland Races/Berliner continued tram page 21 builders mechanics prepared enter much serious race ofthe airplanes ever raced again Turners two-time Thompson-winning Meteor now display Washing tons National Air & Space Museum LeViers Firecracker exists pieces California Chesters Goon complete West Coast doesnt fly Earl Ortmans Marcoux Bromberg finally being restored Connecticut Wittmans Bonzo EAA Mu seum near Milwaukee Most others just seemed disappear though few enthusiasts continue try follow up faint leads pilots few went race briefly after war Wittman stuck racing career stood 52 words being written end yet sight other pre-war racing name remains competitive Harold Neumann winner 1935 Thompson Greve Races regularly places well aerobatic contests Monocoupe painted just like old racer called Harolds Little Mulligan Thanks Golden Age Air Racing still alive thanks too memories others continued RC Technique/Myers continued page 23 field face new situation either because last time out told go home make some kind change because minor accident resulted some rebuilding change airplanes characteris tics As result waste air-time fighting plane instead learning new maneuvers Begin Ground School proper ground school session deals what student supposed learn ground demonstrate air particular day Learning has planned experience order have rapid progress Air time should limited maximum four minutes per flight until student ready solo Very few beginners can go longer two minutes during first 10 sessions get behind become desperate trying catch up Learning ceases Long flights early learning teach bad habit reacting airplane instead leading around sky Work plan student should have copy training plan pocket Before ground school begins whip out training plan discuss instruc tor parts already covered Agree what next step will before starting ground school session approach keeps starting over begin ning time meet new instructor club doesnt already have training plan syllabus might try 1 Demonstration 4 controlfunc dons Instructor emphasizes control stick position proportional rate roll pitch yaw angle airplane flies 2 Racetrack straight out back student learns about apparent control reversal hell make lot circles far end course 3 Racetrack other way plus loop Get over loop pre pared Half beginners will Fig ure 9 4 S-turns going out straight flight back works best can use runway ground reference keeping left- right-hand turns equal Never mind wind concentrate keeping altitude constant Teaches coordination 5 Spin recovery instructor puts plane spin student gets out Spin recognition what important 6 Inverted Racetrack now student should making own takeoffs Get him inverted before has chance afraid may also demonstrate really learned 5 should make point instructor looking demonstration fact student understands what wanted trying 106 Model Aviation great schoolyard scale TRAVEL AIR 020 ruboe power 36 span 12 channel R/C tree flight 51495 looking forperfection want see student flying airplane vice-versa 7 Landing pattern Start high 200 feet work down plan land Plan make airplane go supposed reference runway local obstructions Go up again 8 Landings plane properly trimmed will land itself have steer runway 9 Solo fast learner will get point afternoon instructor has time spend him supervised solo doesnt mean student ready go off himself unattended means student has mastered basics now ready learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Scale/Wischers continued page 32 gusty winds Saturday air ground handling PE-2 excellent Modelers WW LI training planes may remember anti-spin strakes used some deHavilland Tiger Moths forward extensions horizontal stabilizer joins fuselage purpose being correction tendency flat spin Anti-spin strakes have reappeared Beech T-34 turboprop trainer model plane flown third place Bud Atkinson Buds Beech added nose length turboprop plane ideally proportioned modeling new plane made three flights before contest Bud yet determined effectiveness strakes Hank Pohlman again flown Iowa Cessna 172 Skyhawk carrying 65-in model Hawk specially constructed luggage compartment must ultimate scale documentation Victim high wind its first round flight hastily repaired ubiquitous instant glue going win first place Expert Division IL Hanks Skyhawk will released Sig kit later year complete foam wing formed molded ABS fuselage cowl pants windows corru gated control surfaces quarter-scale scratch-built Aeronca C-3 four Florida entrants Mario Yeder linics C-3 flown 0 S Max 60 fourcycle engine came surprisingly close authentic sound two-cylinder Aeronca E 113 engine apparent slow pace C-3 added considerably realism flight combin ing its high static score gain first place Sportsman Division II Mario also flew Hawker Hurricane Division Art Johnson also made thousand mile trip Florida renowned Lockheed P-38 Lightning Art sealed joints points P-38 assembled give plane overall smooth exterior large model needed transported piece just barely fitting capacious station wagon popularity Arts plane best evidenced spectator contestant reaction flies Absolutely everyone watches complete flight special attention instant droppable fuel tanks deployed Apair OS Max 60 Schnuerle engines supply energy Tip Stalls Again February column de scribed method preventing tip stalls tapered wing greater percentage thick ness toward tip Dan Parsons writes agree what said have question recommended methods preven ting tip stall increase percentage wing thickness tip over root have seen suggested over years other modelers wonder idea came According studies airfoil lift curves section lift coefficient vs section angle attack Theory Wing Sections Abbott Doenhoff just opposite technique should employed percentage wing thickness tip should decreased over root reason being type airfoils com monly used modelers 12% airfoil stalls higher angle attack 15% Thus wing tapering 15% root 12% tip have built washout having warp wing following table illus trates NACA * Stall Angle Max Lift Cocif 24121516 2415 2421 4412 4415 23012 23015 23024 14 14 13 12 165 15 14 14 125 152 143 162 153 120 As will note max lift coefficient also higher 12% thickness years modelers have thought thicker airfoil lift Taint according curves least September 1979 107
Edition: Model Aviation - 1979/09
Page Numbers: 22, 23, 106, 107
HEADS UP aint got Crunch Now turn off transmitter collapse antenna walk slowly crash site. right Wrong Leave transmitter tenna extended airborne unit still operating transmitters signal will keep servos centered turn off transmitter take chance having some other signal drive servos hard against stops thereby destroying what otherwise crash survivor Now scene first thing stir sticks see receiver still working Another mistake Leave testing later now disconnect airborne battery pack taking care get bad burn wires should shortcircuit occur somewhere turn off transmitter Carefully pick up everything Todays fast adhesives allow restore prac tically airframe damage As radio little things like servo mounting hardware output wheels frequently hardest find need Time saved cleanup activity trans lates expense later Rack pits pieces laid out inspection its time discover cause crash Never assume cause prove may simply lost control through inexperience again may seem way well remember experienced flier thought departure stall snaproll crash due unfamiliarity new plane until bystander noticed output meter transmitter read zero Everybody knows meters dont mean anything everybody ig nores Except meter case telling him transmitter wasnt radiating Transmitters rarely rail game over should check interference radio isnt working First check Get clip back neces sary turn transmitter look meter have access field-strength meter use cross-check transmitter output cases can put transmitter antenna near port able AM receiver listen trans mitter can tell channels working listening change sound move control time Tune around until hear brrrr changes move sticks Second check Separate airborne pack individual units carry tooth brush field kit preliminary clean-up Inspect cases damage battery receiver servos switch harness Next check wires breaks Grasp servo output wheel try turn systems have such high mechanical advantage gear train cant normally can move now youve got concealed damage opposite also true cant move could before have warning open up servo case internal inspection before connect receiver again Jammed gears can blow out amplifier just few seconds Third check Plug battery pack some kind tester use Astro Flight Inc R/C System Analyzer-Rapid Charger because have it works both tests recharges batteries bunch other products can use point use something Find out per haps cells pack have 22 Model Aviation Fig 1 can tell transmitter radiating signal 1 Look meter 2 Clip RS Systems RFM form field-atrengtn meter7 3 Listen Brrr portable radio 4 Look indication fieldatrength meter 5 Look white bars TV screen gone bad Its known happen Fourth check Assuming have identified least servo seems undamaged further assuming battery pack useable substitute available assemble both receiver turn transmitter may seems normal normal ground range check may find receiver works transmitter antenna ex tended up close col lapsed away normal groundcheck distance indicates cracked crystal receiver Crystals frequently break crashes receiver seems completely inoperative wrap receiver antenna loosely around middle extended transmitter antenna Try again re ceiver works virtually proof need diagnose broken crystal youve got some other kind problem Perhaps servo really isnt working Try another now should have pretty good idea what caused crash system still working after abuse usually something else caused crash Perhaps wing floated away itself just before fuselage began its final dive did happen cant find exact cause leave yourself wide open repetition problem next time fly Some people learn fly almost im mediately others never learn Admittedly people different Some lack basic drive succeed may Ive yet meet first person really cant learn fly given right equipment training People keep crashing motivated learn What need better equip ment purpose learning better instruction point life Ive seen variations basic theme motorized flying cross radio Im willing concede virtually anything will fly some fly better others Which leads quickest learning thats real question Begin 4-channel radio Getting familiar feel transmitter half battle Folks begin cheap 2-channel radio has stick side moves up-down stick other side moves left-right can learn fly way teach themselves set reactions will have unlearned before can make progress standard 4-channel radio 4-function airplane Begin 4-function airplane prefer ably someone elses clubs have gone club trainer owned operated club-certified instructors Carl Gold bergs Falcon 56 often used Fledgling fine way learn since plane operated fashion Fig 5 Few iOOSG wraps OT reuvur ai,,i5 shown sit needed overcome broken likely properly balanced trimmed crystal put system back operation George describes simple tests doubtful crystai September1979 23 wheel pants canopies etc works home oven hose type vacuum cleaner FOECAT@R MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC PLASTICBulk Pack Vacuum former piastics ASS PIAlw Sheets foe Form alto Easy make own cowlsAllah Btho17 Packs Only PCSPACK THICKNESS PER PACK PRICE 0201/50301300 030 1132201300 045 3/64131300 0601/16101300 0903/3261300 Assortment Pack see below 1300 Aootowt Pooh no0300 0020/ *oa%3.o45 2550/ 000 1000 ohot. y pooh p12 0000 oOwd wilt Fowtoto ALL AM S winE Over 3/ Lbs per pack Idea Development Inc ox 7399 rk Delaware 19711 Instructions assembly & use Included $39 Lincludes A88t Pack ABS SHIPPED PREPAID 9VIA UPS US ONLY dealer order direct Qualified Dealer Inquiries Invited new ruleasos Bucker ITTTMEISTER radio control lwingspan Seagulltor rubber available soon C 02 power SEE YOURsend 254 DEALER NOWcatalog FLYLINE MODELS INC 2820 DORA AVENUE RIO FAIRFAX VIRON2 22031703 RIO 2238 ANNOUNCING Post Stoop Climb FLat Slow Glide 4 new P 30 class model designed novice mind ond has potential won toughest THE POTENT30 Deluxe kit leatures include Rolled balsa lusela no ond wing mount dl Completed prop d nose plug tail plug & rudder Precut wing ribs spar notches job rated balsa strips Highest quality tissue lubed contest rubber Detailed instructionsfiying tips help win CAT NO R2 Sees pp check money order CHAS WERLE 3620 MORSE AVE NOS SACTO CALIF 95821 Cleveland Races/Berliner continued tram page 21 builders mechanics prepared enter much serious race ofthe airplanes ever raced again Turners two-time Thompson-winning Meteor now display Washing tons National Air & Space Museum LeViers Firecracker exists pieces California Chesters Goon complete West Coast doesnt fly Earl Ortmans Marcoux Bromberg finally being restored Connecticut Wittmans Bonzo EAA Mu seum near Milwaukee Most others just seemed disappear though few enthusiasts continue try follow up faint leads pilots few went race briefly after war Wittman stuck racing career stood 52 words being written end yet sight other pre-war racing name remains competitive Harold Neumann winner 1935 Thompson Greve Races regularly places well aerobatic contests Monocoupe painted just like old racer called Harolds Little Mulligan Thanks Golden Age Air Racing still alive thanks too memories others continued RC Technique/Myers continued page 23 field face new situation either because last time out told go home make some kind change because minor accident resulted some rebuilding change airplanes characteris tics As result waste air-time fighting plane instead learning new maneuvers Begin Ground School proper ground school session deals what student supposed learn ground demonstrate air particular day Learning has planned experience order have rapid progress Air time should limited maximum four minutes per flight until student ready solo Very few beginners can go longer two minutes during first 10 sessions get behind become desperate trying catch up Learning ceases Long flights early learning teach bad habit reacting airplane instead leading around sky Work plan student should have copy training plan pocket Before ground school begins whip out training plan discuss instruc tor parts already covered Agree what next step will before starting ground school session approach keeps starting over begin ning time meet new instructor club doesnt already have training plan syllabus might try 1 Demonstration 4 controlfunc dons Instructor emphasizes control stick position proportional rate roll pitch yaw angle airplane flies 2 Racetrack straight out back student learns about apparent control reversal hell make lot circles far end course 3 Racetrack other way plus loop Get over loop pre pared Half beginners will Fig ure 9 4 S-turns going out straight flight back works best can use runway ground reference keeping left- right-hand turns equal Never mind wind concentrate keeping altitude constant Teaches coordination 5 Spin recovery instructor puts plane spin student gets out Spin recognition what important 6 Inverted Racetrack now student should making own takeoffs Get him inverted before has chance afraid may also demonstrate really learned 5 should make point instructor looking demonstration fact student understands what wanted trying 106 Model Aviation great schoolyard scale TRAVEL AIR 020 ruboe power 36 span 12 channel R/C tree flight 51495 looking forperfection want see student flying airplane vice-versa 7 Landing pattern Start high 200 feet work down plan land Plan make airplane go supposed reference runway local obstructions Go up again 8 Landings plane properly trimmed will land itself have steer runway 9 Solo fast learner will get point afternoon instructor has time spend him supervised solo doesnt mean student ready go off himself unattended means student has mastered basics now ready learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Scale/Wischers continued page 32 gusty winds Saturday air ground handling PE-2 excellent Modelers WW LI training planes may remember anti-spin strakes used some deHavilland Tiger Moths forward extensions horizontal stabilizer joins fuselage purpose being correction tendency flat spin Anti-spin strakes have reappeared Beech T-34 turboprop trainer model plane flown third place Bud Atkinson Buds Beech added nose length turboprop plane ideally proportioned modeling new plane made three flights before contest Bud yet determined effectiveness strakes Hank Pohlman again flown Iowa Cessna 172 Skyhawk carrying 65-in model Hawk specially constructed luggage compartment must ultimate scale documentation Victim high wind its first round flight hastily repaired ubiquitous instant glue going win first place Expert Division IL Hanks Skyhawk will released Sig kit later year complete foam wing formed molded ABS fuselage cowl pants windows corru gated control surfaces quarter-scale scratch-built Aeronca C-3 four Florida entrants Mario Yeder linics C-3 flown 0 S Max 60 fourcycle engine came surprisingly close authentic sound two-cylinder Aeronca E 113 engine apparent slow pace C-3 added considerably realism flight combin ing its high static score gain first place Sportsman Division II Mario also flew Hawker Hurricane Division Art Johnson also made thousand mile trip Florida renowned Lockheed P-38 Lightning Art sealed joints points P-38 assembled give plane overall smooth exterior large model needed transported piece just barely fitting capacious station wagon popularity Arts plane best evidenced spectator contestant reaction flies Absolutely everyone watches complete flight special attention instant droppable fuel tanks deployed Apair OS Max 60 Schnuerle engines supply energy Tip Stalls Again February column de scribed method preventing tip stalls tapered wing greater percentage thick ness toward tip Dan Parsons writes agree what said have question recommended methods preven ting tip stall increase percentage wing thickness tip over root have seen suggested over years other modelers wonder idea came According studies airfoil lift curves section lift coefficient vs section angle attack Theory Wing Sections Abbott Doenhoff just opposite technique should employed percentage wing thickness tip should decreased over root reason being type airfoils com monly used modelers 12% airfoil stalls higher angle attack 15% Thus wing tapering 15% root 12% tip have built washout having warp wing following table illus trates NACA * Stall Angle Max Lift Cocif 24121516 2415 2421 4412 4415 23012 23015 23024 14 14 13 12 165 15 14 14 125 152 143 162 153 120 As will note max lift coefficient also higher 12% thickness years modelers have thought thicker airfoil lift Taint according curves least September 1979 107
Edition: Model Aviation - 1979/09
Page Numbers: 22, 23, 106, 107
HEADS UP aint got Crunch Now turn off transmitter collapse antenna walk slowly crash site. right Wrong Leave transmitter tenna extended airborne unit still operating transmitters signal will keep servos centered turn off transmitter take chance having some other signal drive servos hard against stops thereby destroying what otherwise crash survivor Now scene first thing stir sticks see receiver still working Another mistake Leave testing later now disconnect airborne battery pack taking care get bad burn wires should shortcircuit occur somewhere turn off transmitter Carefully pick up everything Todays fast adhesives allow restore prac tically airframe damage As radio little things like servo mounting hardware output wheels frequently hardest find need Time saved cleanup activity trans lates expense later Rack pits pieces laid out inspection its time discover cause crash Never assume cause prove may simply lost control through inexperience again may seem way well remember experienced flier thought departure stall snaproll crash due unfamiliarity new plane until bystander noticed output meter transmitter read zero Everybody knows meters dont mean anything everybody ig nores Except meter case telling him transmitter wasnt radiating Transmitters rarely rail game over should check interference radio isnt working First check Get clip back neces sary turn transmitter look meter have access field-strength meter use cross-check transmitter output cases can put transmitter antenna near port able AM receiver listen trans mitter can tell channels working listening change sound move control time Tune around until hear brrrr changes move sticks Second check Separate airborne pack individual units carry tooth brush field kit preliminary clean-up Inspect cases damage battery receiver servos switch harness Next check wires breaks Grasp servo output wheel try turn systems have such high mechanical advantage gear train cant normally can move now youve got concealed damage opposite also true cant move could before have warning open up servo case internal inspection before connect receiver again Jammed gears can blow out amplifier just few seconds Third check Plug battery pack some kind tester use Astro Flight Inc R/C System Analyzer-Rapid Charger because have it works both tests recharges batteries bunch other products can use point use something Find out per haps cells pack have 22 Model Aviation Fig 1 can tell transmitter radiating signal 1 Look meter 2 Clip RS Systems RFM form field-atrengtn meter7 3 Listen Brrr portable radio 4 Look indication fieldatrength meter 5 Look white bars TV screen gone bad Its known happen Fourth check Assuming have identified least servo seems undamaged further assuming battery pack useable substitute available assemble both receiver turn transmitter may seems normal normal ground range check may find receiver works transmitter antenna ex tended up close col lapsed away normal groundcheck distance indicates cracked crystal receiver Crystals frequently break crashes receiver seems completely inoperative wrap receiver antenna loosely around middle extended transmitter antenna Try again re ceiver works virtually proof need diagnose broken crystal youve got some other kind problem Perhaps servo really isnt working Try another now should have pretty good idea what caused crash system still working after abuse usually something else caused crash Perhaps wing floated away itself just before fuselage began its final dive did happen cant find exact cause leave yourself wide open repetition problem next time fly Some people learn fly almost im mediately others never learn Admittedly people different Some lack basic drive succeed may Ive yet meet first person really cant learn fly given right equipment training People keep crashing motivated learn What need better equip ment purpose learning better instruction point life Ive seen variations basic theme motorized flying cross radio Im willing concede virtually anything will fly some fly better others Which leads quickest learning thats real question Begin 4-channel radio Getting familiar feel transmitter half battle Folks begin cheap 2-channel radio has stick side moves up-down stick other side moves left-right can learn fly way teach themselves set reactions will have unlearned before can make progress standard 4-channel radio 4-function airplane Begin 4-function airplane prefer ably someone elses clubs have gone club trainer owned operated club-certified instructors Carl Gold bergs Falcon 56 often used Fledgling fine way learn since plane operated fashion Fig 5 Few iOOSG wraps OT reuvur ai,,i5 shown sit needed overcome broken likely properly balanced trimmed crystal put system back operation George describes simple tests doubtful crystai September1979 23 wheel pants canopies etc works home oven hose type vacuum cleaner FOECAT@R MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC PLASTICBulk Pack Vacuum former piastics ASS PIAlw Sheets foe Form alto Easy make own cowlsAllah Btho17 Packs Only PCSPACK THICKNESS PER PACK PRICE 0201/50301300 030 1132201300 045 3/64131300 0601/16101300 0903/3261300 Assortment Pack see below 1300 Aootowt Pooh no0300 0020/ *oa%3.o45 2550/ 000 1000 ohot. y pooh p12 0000 oOwd wilt Fowtoto ALL AM S winE Over 3/ Lbs per pack Idea Development Inc ox 7399 rk Delaware 19711 Instructions assembly & use Included $39 Lincludes A88t Pack ABS SHIPPED PREPAID 9VIA UPS US ONLY dealer order direct Qualified Dealer Inquiries Invited new ruleasos Bucker ITTTMEISTER radio control lwingspan Seagulltor rubber available soon C 02 power SEE YOURsend 254 DEALER NOWcatalog FLYLINE MODELS INC 2820 DORA AVENUE RIO FAIRFAX VIRON2 22031703 RIO 2238 ANNOUNCING Post Stoop Climb FLat Slow Glide 4 new P 30 class model designed novice mind ond has potential won toughest THE POTENT30 Deluxe kit leatures include Rolled balsa lusela no ond wing mount dl Completed prop d nose plug tail plug & rudder Precut wing ribs spar notches job rated balsa strips Highest quality tissue lubed contest rubber Detailed instructionsfiying tips help win CAT NO R2 Sees pp check money order CHAS WERLE 3620 MORSE AVE NOS SACTO CALIF 95821 Cleveland Races/Berliner continued tram page 21 builders mechanics prepared enter much serious race ofthe airplanes ever raced again Turners two-time Thompson-winning Meteor now display Washing tons National Air & Space Museum LeViers Firecracker exists pieces California Chesters Goon complete West Coast doesnt fly Earl Ortmans Marcoux Bromberg finally being restored Connecticut Wittmans Bonzo EAA Mu seum near Milwaukee Most others just seemed disappear though few enthusiasts continue try follow up faint leads pilots few went race briefly after war Wittman stuck racing career stood 52 words being written end yet sight other pre-war racing name remains competitive Harold Neumann winner 1935 Thompson Greve Races regularly places well aerobatic contests Monocoupe painted just like old racer called Harolds Little Mulligan Thanks Golden Age Air Racing still alive thanks too memories others continued RC Technique/Myers continued page 23 field face new situation either because last time out told go home make some kind change because minor accident resulted some rebuilding change airplanes characteris tics As result waste air-time fighting plane instead learning new maneuvers Begin Ground School proper ground school session deals what student supposed learn ground demonstrate air particular day Learning has planned experience order have rapid progress Air time should limited maximum four minutes per flight until student ready solo Very few beginners can go longer two minutes during first 10 sessions get behind become desperate trying catch up Learning ceases Long flights early learning teach bad habit reacting airplane instead leading around sky Work plan student should have copy training plan pocket Before ground school begins whip out training plan discuss instruc tor parts already covered Agree what next step will before starting ground school session approach keeps starting over begin ning time meet new instructor club doesnt already have training plan syllabus might try 1 Demonstration 4 controlfunc dons Instructor emphasizes control stick position proportional rate roll pitch yaw angle airplane flies 2 Racetrack straight out back student learns about apparent control reversal hell make lot circles far end course 3 Racetrack other way plus loop Get over loop pre pared Half beginners will Fig ure 9 4 S-turns going out straight flight back works best can use runway ground reference keeping left- right-hand turns equal Never mind wind concentrate keeping altitude constant Teaches coordination 5 Spin recovery instructor puts plane spin student gets out Spin recognition what important 6 Inverted Racetrack now student should making own takeoffs Get him inverted before has chance afraid may also demonstrate really learned 5 should make point instructor looking demonstration fact student understands what wanted trying 106 Model Aviation great schoolyard scale TRAVEL AIR 020 ruboe power 36 span 12 channel R/C tree flight 51495 looking forperfection want see student flying airplane vice-versa 7 Landing pattern Start high 200 feet work down plan land Plan make airplane go supposed reference runway local obstructions Go up again 8 Landings plane properly trimmed will land itself have steer runway 9 Solo fast learner will get point afternoon instructor has time spend him supervised solo doesnt mean student ready go off himself unattended means student has mastered basics now ready learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Scale/Wischers continued page 32 gusty winds Saturday air ground handling PE-2 excellent Modelers WW LI training planes may remember anti-spin strakes used some deHavilland Tiger Moths forward extensions horizontal stabilizer joins fuselage purpose being correction tendency flat spin Anti-spin strakes have reappeared Beech T-34 turboprop trainer model plane flown third place Bud Atkinson Buds Beech added nose length turboprop plane ideally proportioned modeling new plane made three flights before contest Bud yet determined effectiveness strakes Hank Pohlman again flown Iowa Cessna 172 Skyhawk carrying 65-in model Hawk specially constructed luggage compartment must ultimate scale documentation Victim high wind its first round flight hastily repaired ubiquitous instant glue going win first place Expert Division IL Hanks Skyhawk will released Sig kit later year complete foam wing formed molded ABS fuselage cowl pants windows corru gated control surfaces quarter-scale scratch-built Aeronca C-3 four Florida entrants Mario Yeder linics C-3 flown 0 S Max 60 fourcycle engine came surprisingly close authentic sound two-cylinder Aeronca E 113 engine apparent slow pace C-3 added considerably realism flight combin ing its high static score gain first place Sportsman Division II Mario also flew Hawker Hurricane Division Art Johnson also made thousand mile trip Florida renowned Lockheed P-38 Lightning Art sealed joints points P-38 assembled give plane overall smooth exterior large model needed transported piece just barely fitting capacious station wagon popularity Arts plane best evidenced spectator contestant reaction flies Absolutely everyone watches complete flight special attention instant droppable fuel tanks deployed Apair OS Max 60 Schnuerle engines supply energy Tip Stalls Again February column de scribed method preventing tip stalls tapered wing greater percentage thick ness toward tip Dan Parsons writes agree what said have question recommended methods preven ting tip stall increase percentage wing thickness tip over root have seen suggested over years other modelers wonder idea came According studies airfoil lift curves section lift coefficient vs section angle attack Theory Wing Sections Abbott Doenhoff just opposite technique should employed percentage wing thickness tip should decreased over root reason being type airfoils com monly used modelers 12% airfoil stalls higher angle attack 15% Thus wing tapering 15% root 12% tip have built washout having warp wing following table illus trates NACA * Stall Angle Max Lift Cocif 24121516 2415 2421 4412 4415 23012 23015 23024 14 14 13 12 165 15 14 14 125 152 143 162 153 120 As will note max lift coefficient also higher 12% thickness years modelers have thought thicker airfoil lift Taint according curves least September 1979 107