Free Flight OLD- TIMER Clarence Haught RUBBER POWER mainstay Old-Timer activity undoubtedly Gas model Earlier Old-Timer revival activity centered around ignition engine late more entries events showing up other disciplines Towline Hand-Launched Glider definitely Rubber isnt cost gasoline ignition engine availability has brought about change direction enjoyment Rubber flying itselfl recent survey National Free Flight Society should memben write NFFS 707 2nd St Davis CA 95616 indicates Rubber Power categories growing leaps bounds Keeping mind Free Flighters multi-interest stuck column showing between 11% 50% interest activity Hand-Launched Glider highest FF Power second FF Old-Timer third Rubber Power tying Scale fourth place FAI events holding down 12th 13th 14th places Fifth place went Indoor least half Rubber So arent Rubber Power Chances its prop carving thats holding back say prop carving builds character Well Ive seen some Old-Timer event rye attended prop carving has around lot longer Gas models early Gas props hand-carved Anyhow Continued page 158 PROPELLER BLOCK LAYOUT I D SMY liZ D 314XD XT SW, P H De DIAMEKR T b SLOCK THCKNESS W ULOCK WIDTH W can use layout formula carve high-quality Rubber prop Prop carving actually fairly simple task once youve laid out blank right rough-cut blank designed per drawing formula given month Carvethe bottom surfacefirat slight bit 1/16 1/s-in undercamber trim blade proper outline using pattern carve top surface sure carve blade pitch direction rotation want kits olden days featured machine-carved prop blanks efficient system did allow modelerto whittle reasonably good prop minimum effort very little time Sandpapering blank often enough Theres still source blanks Full info column September 1982 69 1 Some sample hand-carved props twin pusher top uses right-rotation leftrotation prop little center special small-diameter high-pitch job Scale model short landing gear bottom see one-bladed folderfora Korda hickeyon side no blade counterbalance weight FT BANK RIC DISTRIBUTORS 19 So Brett Street Beacon N V 12508 Hours Mon Sat 914 831-121410 am -9 pm U T[ f11 1-ml *SALI* FP-6FN $17500 Wj4S-26 S26 servo $2195 L Shipping & Handling $300 Please add $200 000 Service Sorry no Foreign Orders Personal checks will held clearance N Y State Residents must add local sales tax Price subject change notice Send long SASE complete listing JET HAWK F4 PHANTOM F-15 EAGLE HUN DERBIRD REVENGER TIGER AlL II TLAS BOOTLEGGER COM EIWLR ZLI -50 L LASER 2 01WP-63 IN OBR N AGL EIlJtIATI FLY RPJPE UICBIRJ TAYAWKF HA4T AGLTVYNOERBIRD RI ENG ERIF rAr1V ATLAS BOOTLEGGE OMNATOR ZLIN Z 50L LASER 20 YAN STA P 53 FLYING TIG P PLANE JAN ourLocal QeaIerSefld$1OoforCataIog -V vivr thing about US FF Champs irks extreme trophy winners simply dont show up collect awards sure guy has set sorts records particular event won sorts first-place trophies event doesnt feel strong personal incentive come forward collect third- fifth-place trophy guy collect first-place trophy having picture taken Joe Hero down third-place box might greatest thing life first-place box once US FF Champsit isnt likely will happen again Joe Hero didnt make appearance receive lower-place award hurt mean hurt collecting lesser-place trophies can regard just plain downhome bad manners scarcely befitting Free Flighters Since appears same bunch con testants come back year after year same things time youd think FF Champs would getting old hat However rd willing bet almost 300 participated year will back next time over againbut maybe just little betterand time afterthat and. FF Old-Timers H aught Continued page 69 lots good information around dis covered proven old guys Rubber-power props usually large dia meter slow-turning Diameters usually range one-third one-half models wingspan Such large-diameter slow-turning prop needs considerable pitch effective Pitch although related blade angle angle distance propeller would advance revolution through solid Air being gas allows considerable slippage resulting loss efficiency pitch diameter go together loading power plant rubber Getting proper combination pitch dia meter motor key good power per formance Proper pitch-to-diameter expressed ratio Pitch-diameter ratio lA-to-1 1-to-i have proven out through experience about right Thus P-D ratio 1 -to-i figures out 30 pitch 20 diameter carve prop desired pitch simple formula devised back Thirties tells us Pitch equals product 314 times diameter times thickness block divided Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airpane- 4 Marine K&B FUELSKaB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER KaB SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS 1 U.F1 Ii~UEI sB 158 Model Aviation ii~ ___________1 Njil H obby ii arn WE ARE PLEASED TO ANNOUNCE acquisition Hal Osborne Plans Service Included over 148 exceptionally high quality Scale plans E drawings Coeplete list 88 PP see below COMING SOON eapect have Partial Kit Snow White Antique Gas Model 1938 available near future pro duced Gene Wallock P del Service Price Availability date known tine Watch ad inforwation OLD TIMER KITS Partial Full Kits P & W Semi Kits--Cut Partt Kits--Machine GuI t939 Comet Zipper 54 Span plan md price $3380 1938 Trenton Terror 72 plan md price $2080 1936 Serketey Buccaneer 84plan Inel price $2550 Other P & 16 Semi Kits available Plan md Price t838 Comet Clipper BK $8925 1933 Dallaire Sportster $3100 8938 Scientific Mercury $2088 0935 Mitt America $3158 1845 Playboy Jr $8700 8841 Playboy Sr. 2225 1938 Powerhouse $2508 8948 Ranger $1880 1848 Corset Sailplane $5058 1848 So Lang $8358 8939 Otorda Wakefield $8875 MIDWAY MODEL CO Full Partial Kits 1941 Air Trails Sportater 59 Full Kit $3586 1938 Pamerhauae 58 Span Pull Kit $3588 1936 Plying Quaker 84 Semi Kit plan mel $2158 1937 Quaker FlasIt 87 Semi Kit plan met $1758 1927 Long Cabin 78 Semi Kit plan md $2808 1948 Comet Sailplane 36 828 engines $1495 1935 Mitt America 28 828 engines $1285 Other Mfg Old Timer Kits--Fall Kits 1941 Playbay Senior Tyra 89 Span $4985 1938 Say Ridge Mike Tyro 48 Span849 $2895 1939 Korda liakefield 4Ka 44 Rubber $1658 NEW Playboy Sr 67 geared Electric Oss Special introductory Price Keg $4495- $3880 LEISURE 05 Geared Sys $18108 Special5••5$7590 ASTRO 075 XL Sys m/reducerReg $110 Spa58080 ASTIIO AC/DC Charger56995Speciaiaaesao$4758 LEISURE DIGITAL Charger $18 88Special" $7589 SHIPPING & HANDLING Up $808 add $158 $891 $2808 add $225 $881 $9588 add $309 $4581 $7880 add $358 over $7808 add $988 CA Addressees add 6$ taa Send MO Visa/MC9Eap Check allow up 38 days CK clearance COD Esact Charges plus $1 50 IldI Cash Only 88 Page CATALOGUE Plans list $280 [A copy will sent free--when requested-with orderI HOBBY HORN ashobby specialties PO Box 3004 Seal Beach Ca 98748 17141 894-6223 [Best sornings recarder--l activates 5 rings width block prop carved formula may solved unknown case factors established such available wood stock restricted diameter due landing gear length etc few quick mathe matical exercises will get information need After laying out block shown accompanying drawing cut away waste carve bottom surface surface should have slight undercamber1/16 mum long X-Acto carving blade sandpaper will trick Shape blade outlines next using template ensure match ing blades Carve top surface airfoil section thinner blade section efficient prop will bebut thinness sacrifices strength Speaking strength Old-Timers use folding props therefore subject prop potential damage landing Proper selection firm straight-grain baisa annular rings either vertical horixontal angledhelps does covering delicate blades silk dope Other woods work quite well Pine spruce makes excel lent prop slight increase weight often helps bring CG limits also pro vIdeo flywheel action Pine props can made thinner still retaining strength last precaution think about what doing before taking first cut quite easy come up left-hand prop carefuL course can always use twin pusher rest practice Buy block balsa start carving builds characters. er character Shrank Ocean Spirit St Louis 34 Wingspan Engines R/C RIC Scale Kil#119 $3195 oIler 22 FlighI-Capable Oesigns Send 506 Flyline Calalog Dealers ributors Welcomed Phone 703 573-2338 FLYLINE MODELS INC 2820 Oorr Ave K-i 1 Fairfax Virginia 22031 Machine-carved props have OT Rubber some time will recall machine carved props supplied popular kits blanks allowed builder finish up acceptable prop few minutes nothing some sandpaper perhaps penknife Joe Dill N 7215 Maher Court Spokane WA 99218 has uncovered supply original machinecarved prop blanks diameters 8 9 10 Joe will make available $200 postpaid props will get air short order current price balsa pretty good deal Update spool dethermalizers discussion spool dethermalizers brought some interesting comments readers actually employed system system may recall released weight spool attached wing tip H055YBt0EAWAY9088YHt7fAWAy908syBtofpsjAyssyNsrs4Ay FAMOUS BRITISH UC DIESELS AEROMODELLER PLANS ES M/E PAW D/C 2nd EDITION CATALOG-DIESEL HANDBOOK $350 pp HOBBY HIDEWAYDELAVANIL 5YHIOIAwAyHOSBYHI0owAyHossyHtoEAwAyW3eoyHIoAw m September 1982 159 $3995 KIT 112 651 Wingspan 19-40 Engine Foam Wing- Balsa Fuse Easy Picture Instructions Send Money Order- Pay UPS Ill Ret add 52 04 Tax GT MODELS Ph 217 895 4136 P0 Box 869 Rantoul III 61866 FREE SUBSCRIPTION & FREE PAINTING support AEROSPACE EDUCATION AVIUON i34c2 tax deductible contribution $25 American Society Aerospace Education will help Society provide aviation/space education materials thousands teachers throughout country Foryour contribution will receive AVIATION/SPACE Magazine full year well Color Lithograph First Flight painting AVIATION/SPACE fascinating wide-ranging informative colorfully illustrated magazine published six times year AVIATION/SPACE helps keep up-to-date Whats being published whats happening aviation space As Special Gift AMA members ASAE wiil send contribute $25 before September 1 1982 Magnificent 20 olor Lithograph wright Brothers First Flight aviation artist wj Reynolds AMERICAN SOCIETY FOR AERO5PACE EDUCATION 1750 Penn Ave NW washington DC 20006 Name Addromn cityStateZi Fl i Enclose $ _____________ As Contribution Aerospace Education ASAE 0 Contribution Enclosed 0 Charge Credit Card VISAExpiration MASTERCARDDate _______________ Card # Signature suitable length linecausing spiral descent until weight hit ground allowing line slacken model recover land George Myers Radio Technique columnist related unhappy experience watching original sailplane floating out sight spool hanging wing George said just tightened up turn bit feels spirally unstable models can brought down system course weight might have done trick contest hesitate carry weight minimum required rules Robert Stuhr Shelby IA solved lack weight problem using C-cell battery instead spooL installation Thermal Thumber used 75 ft button carpet thread secured hole right wing tip just behind spar worked great Robert recently unearthed model battery bore legendplace service before July 1939 AT LAST! TOOL TO PULL SLEEVES AND BEARINGS EASILY AND WITHOUT DAMAGE MAKES ENGINE OVERHAUL PIECE OF CAKE EXPANDING RING SLIDE TAPPER SLEEVE PULLER FOR 60 SIZE ENGINES795 BEARING PULLER FOR 17MM BEARINGS695 Special Order Both For....... 1395 Send check MO include 505 UPS GATOR R/C PRODUCTS 3713 POMPANO DR AcOLA FL 32504 1904 4764639 160 Model Aviation PO Box 607 So Galatin Road Madison TN 37115 868-6311 Sales ice Complete line ROYAL Electronics R/C equipment WARRANTY repairs thing sell Call Ed Venus Brannan Repair Service HOBBY LOBBY EK LOGICTROL FUTABA HOBBY SHACK ROYAL i / s/ BLE SHOOTING HiNT NO 12 - EXCESS NOSE WEIGHT NAL PERSOKAUTY TRAINER GEMES BEAUTIFUL SUPER CHAMP THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts rubber bauds Complete kit $5495 dealer direct GEMINI MODELS INC PO Bo lien Passc NJ 07055 George Myers refers old Austin-Craft timer common use both ignition cutoff dethermalizing slow-leak air timer Doug Dahlke Oshkosh pressed air-leak timer double service using time DT release also using spool weight itself Doug used 70-ft line attach well-wrapped padded timer wingtip Thanks input folks columnists thrive Clarence E Haugh4 3226 Honeysuckle Dr RL 5 Box 16 Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 70 warm air layer top may take quite bit power model break out cooler air warm upper air As soon model gets warm air motor will absorb warmth surrounding air increase temperature will translated extra energy available motor addition air turbulent model will often upset will lose altitude flight time Building light models certain extent following remarks simplification ability build light models depends much tech nique does having super-light wood Briefly keep careful records weight part model various stages building After have flown first model see anything too weak can build part next model little bit lighter again keeping record weights After some part latest model will too light will break often point have discovered limits part model After have discovered light part models can resulting models will much lighter first models built After much practice limits likely outmoded since will have learned handle lighter models safely Washin washout two terms refer intentional wing twist warp Washin means leading edge half wing stab higher trailing edge surface twisted higher angle attack Washout just oppositewing twist reduces angle attack reasons having washin/washout adjust ments wing twofold control torque compensate turning flight think about model flying circle realize inboard wing tip traveling smaller circle outboard wing tip therefore actually flying slower Consequently derive same lift inboard wing necessary crease angle attack airfoil Washin will nicely same way can use reverse twist washout help reduce excess lift generated faster-flying outboard wing model designs minimize amount washin wash out required making inboard wing longer get extra lift having area inboard side model What about torque Torque reaction model twisting force applied propeller rubber motor STINS5~ VOYAGER Quarter Scale 2 oth Kits designed Quadra other 2 cycle engines Plywood & Softwood construction J $9950 Th BONZO Almost 1/3 Scale Sport Pylon Pattern Flying 60 Quadra Power Wing Span 54 1 Pc Shipping Charges Included US & Canada motor turns propeller clockwise also trying turn fuselage counterclockwise adds downward force inboard wing extra washin extra area combination two will help overcome force Thrust adjustments ability change angle thrust line line through prop shaft very useful adjusting Indoor models order able make adjust ment model must have double thrust bear ing prop shaft supported bearing front usually hook rear thrust bearing can bent otherwise adjusted prop shaft can made point some direction other straight forward Some fliers actually plan ahead build favorite thrust adjustments during construction distinctive sound air. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUE ORLANII PARK ILLINOIS 60462 Capabfe carrying 10 lbs cargo WingSpan 931/4 2pcs GIANT-SCALE PLANS Including Assembly Instructions Available J5 Airplanes Boats $1 795 SET -5 ENTERPRISES 4 Box 82 Belmont Ontario NOt iBO PflOne 1 5194440375 model example nearly always use least small amount left thrust may install after early test flights What benefit thrust adjustments Different adjustments take hold different times example turn installed rudder increases effectiveness model speed creases Turn caused stab tilt largely lowspeed adjustment thrust line adjustments have greatest effect thrust high problem Indoor models have tendency turn open up get wider during power burst Much problem comes fact tightly wound motor distorts modeL major effects Easy Btype models motor stick twists lot sometimes causes reverse stab tilt September 1 982 161 BIG BEAUTIFUL AIRPLANES LOADMASTER 0
Edition: Model Aviation - 1982/09
Page Numbers: 69, 158, 159, 160, 161
Free Flight OLD- TIMER Clarence Haught RUBBER POWER mainstay Old-Timer activity undoubtedly Gas model Earlier Old-Timer revival activity centered around ignition engine late more entries events showing up other disciplines Towline Hand-Launched Glider definitely Rubber isnt cost gasoline ignition engine availability has brought about change direction enjoyment Rubber flying itselfl recent survey National Free Flight Society should memben write NFFS 707 2nd St Davis CA 95616 indicates Rubber Power categories growing leaps bounds Keeping mind Free Flighters multi-interest stuck column showing between 11% 50% interest activity Hand-Launched Glider highest FF Power second FF Old-Timer third Rubber Power tying Scale fourth place FAI events holding down 12th 13th 14th places Fifth place went Indoor least half Rubber So arent Rubber Power Chances its prop carving thats holding back say prop carving builds character Well Ive seen some Old-Timer event rye attended prop carving has around lot longer Gas models early Gas props hand-carved Anyhow Continued page 158 PROPELLER BLOCK LAYOUT I D SMY liZ D 314XD XT SW, P H De DIAMEKR T b SLOCK THCKNESS W ULOCK WIDTH W can use layout formula carve high-quality Rubber prop Prop carving actually fairly simple task once youve laid out blank right rough-cut blank designed per drawing formula given month Carvethe bottom surfacefirat slight bit 1/16 1/s-in undercamber trim blade proper outline using pattern carve top surface sure carve blade pitch direction rotation want kits olden days featured machine-carved prop blanks efficient system did allow modelerto whittle reasonably good prop minimum effort very little time Sandpapering blank often enough Theres still source blanks Full info column September 1982 69 1 Some sample hand-carved props twin pusher top uses right-rotation leftrotation prop little center special small-diameter high-pitch job Scale model short landing gear bottom see one-bladed folderfora Korda hickeyon side no blade counterbalance weight FT BANK RIC DISTRIBUTORS 19 So Brett Street Beacon N V 12508 Hours Mon Sat 914 831-121410 am -9 pm U T[ f11 1-ml *SALI* FP-6FN $17500 Wj4S-26 S26 servo $2195 L Shipping & Handling $300 Please add $200 000 Service Sorry no Foreign Orders Personal checks will held clearance N Y State Residents must add local sales tax Price subject change notice Send long SASE complete listing JET HAWK F4 PHANTOM F-15 EAGLE HUN DERBIRD REVENGER TIGER AlL II TLAS BOOTLEGGER COM EIWLR ZLI -50 L LASER 2 01WP-63 IN OBR N AGL EIlJtIATI FLY RPJPE UICBIRJ TAYAWKF HA4T AGLTVYNOERBIRD RI ENG ERIF rAr1V ATLAS BOOTLEGGE OMNATOR ZLIN Z 50L LASER 20 YAN STA P 53 FLYING TIG P PLANE JAN ourLocal QeaIerSefld$1OoforCataIog -V vivr thing about US FF Champs irks extreme trophy winners simply dont show up collect awards sure guy has set sorts records particular event won sorts first-place trophies event doesnt feel strong personal incentive come forward collect third- fifth-place trophy guy collect first-place trophy having picture taken Joe Hero down third-place box might greatest thing life first-place box once US FF Champsit isnt likely will happen again Joe Hero didnt make appearance receive lower-place award hurt mean hurt collecting lesser-place trophies can regard just plain downhome bad manners scarcely befitting Free Flighters Since appears same bunch con testants come back year after year same things time youd think FF Champs would getting old hat However rd willing bet almost 300 participated year will back next time over againbut maybe just little betterand time afterthat and. FF Old-Timers H aught Continued page 69 lots good information around dis covered proven old guys Rubber-power props usually large dia meter slow-turning Diameters usually range one-third one-half models wingspan Such large-diameter slow-turning prop needs considerable pitch effective Pitch although related blade angle angle distance propeller would advance revolution through solid Air being gas allows considerable slippage resulting loss efficiency pitch diameter go together loading power plant rubber Getting proper combination pitch dia meter motor key good power per formance Proper pitch-to-diameter expressed ratio Pitch-diameter ratio lA-to-1 1-to-i have proven out through experience about right Thus P-D ratio 1 -to-i figures out 30 pitch 20 diameter carve prop desired pitch simple formula devised back Thirties tells us Pitch equals product 314 times diameter times thickness block divided Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airpane- 4 Marine K&B FUELSKaB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER KaB SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS 1 U.F1 Ii~UEI sB 158 Model Aviation ii~ ___________1 Njil H obby ii arn WE ARE PLEASED TO ANNOUNCE acquisition Hal Osborne Plans Service Included over 148 exceptionally high quality Scale plans E drawings Coeplete list 88 PP see below COMING SOON eapect have Partial Kit Snow White Antique Gas Model 1938 available near future pro duced Gene Wallock P del Service Price Availability date known tine Watch ad inforwation OLD TIMER KITS Partial Full Kits P & W Semi Kits--Cut Partt Kits--Machine GuI t939 Comet Zipper 54 Span plan md price $3380 1938 Trenton Terror 72 plan md price $2080 1936 Serketey Buccaneer 84plan Inel price $2550 Other P & 16 Semi Kits available Plan md Price t838 Comet Clipper BK $8925 1933 Dallaire Sportster $3100 8938 Scientific Mercury $2088 0935 Mitt America $3158 1845 Playboy Jr $8700 8841 Playboy Sr. 2225 1938 Powerhouse $2508 8948 Ranger $1880 1848 Corset Sailplane $5058 1848 So Lang $8358 8939 Otorda Wakefield $8875 MIDWAY MODEL CO Full Partial Kits 1941 Air Trails Sportater 59 Full Kit $3586 1938 Pamerhauae 58 Span Pull Kit $3588 1936 Plying Quaker 84 Semi Kit plan mel $2158 1937 Quaker FlasIt 87 Semi Kit plan met $1758 1927 Long Cabin 78 Semi Kit plan md $2808 1948 Comet Sailplane 36 828 engines $1495 1935 Mitt America 28 828 engines $1285 Other Mfg Old Timer Kits--Fall Kits 1941 Playbay Senior Tyra 89 Span $4985 1938 Say Ridge Mike Tyro 48 Span849 $2895 1939 Korda liakefield 4Ka 44 Rubber $1658 NEW Playboy Sr 67 geared Electric Oss Special introductory Price Keg $4495- $3880 LEISURE 05 Geared Sys $18108 Special5••5$7590 ASTRO 075 XL Sys m/reducerReg $110 Spa58080 ASTIIO AC/DC Charger56995Speciaiaaesao$4758 LEISURE DIGITAL Charger $18 88Special" $7589 SHIPPING & HANDLING Up $808 add $158 $891 $2808 add $225 $881 $9588 add $309 $4581 $7880 add $358 over $7808 add $988 CA Addressees add 6$ taa Send MO Visa/MC9Eap Check allow up 38 days CK clearance COD Esact Charges plus $1 50 IldI Cash Only 88 Page CATALOGUE Plans list $280 [A copy will sent free--when requested-with orderI HOBBY HORN ashobby specialties PO Box 3004 Seal Beach Ca 98748 17141 894-6223 [Best sornings recarder--l activates 5 rings width block prop carved formula may solved unknown case factors established such available wood stock restricted diameter due landing gear length etc few quick mathe matical exercises will get information need After laying out block shown accompanying drawing cut away waste carve bottom surface surface should have slight undercamber1/16 mum long X-Acto carving blade sandpaper will trick Shape blade outlines next using template ensure match ing blades Carve top surface airfoil section thinner blade section efficient prop will bebut thinness sacrifices strength Speaking strength Old-Timers use folding props therefore subject prop potential damage landing Proper selection firm straight-grain baisa annular rings either vertical horixontal angledhelps does covering delicate blades silk dope Other woods work quite well Pine spruce makes excel lent prop slight increase weight often helps bring CG limits also pro vIdeo flywheel action Pine props can made thinner still retaining strength last precaution think about what doing before taking first cut quite easy come up left-hand prop carefuL course can always use twin pusher rest practice Buy block balsa start carving builds characters. er character Shrank Ocean Spirit St Louis 34 Wingspan Engines R/C RIC Scale Kil#119 $3195 oIler 22 FlighI-Capable Oesigns Send 506 Flyline Calalog Dealers ributors Welcomed Phone 703 573-2338 FLYLINE MODELS INC 2820 Oorr Ave K-i 1 Fairfax Virginia 22031 Machine-carved props have OT Rubber some time will recall machine carved props supplied popular kits blanks allowed builder finish up acceptable prop few minutes nothing some sandpaper perhaps penknife Joe Dill N 7215 Maher Court Spokane WA 99218 has uncovered supply original machinecarved prop blanks diameters 8 9 10 Joe will make available $200 postpaid props will get air short order current price balsa pretty good deal Update spool dethermalizers discussion spool dethermalizers brought some interesting comments readers actually employed system system may recall released weight spool attached wing tip H055YBt0EAWAY9088YHt7fAWAy908syBtofpsjAyssyNsrs4Ay FAMOUS BRITISH UC DIESELS AEROMODELLER PLANS ES M/E PAW D/C 2nd EDITION CATALOG-DIESEL HANDBOOK $350 pp HOBBY HIDEWAYDELAVANIL 5YHIOIAwAyHOSBYHI0owAyHossyHtoEAwAyW3eoyHIoAw m September 1982 159 $3995 KIT 112 651 Wingspan 19-40 Engine Foam Wing- Balsa Fuse Easy Picture Instructions Send Money Order- Pay UPS Ill Ret add 52 04 Tax GT MODELS Ph 217 895 4136 P0 Box 869 Rantoul III 61866 FREE SUBSCRIPTION & FREE PAINTING support AEROSPACE EDUCATION AVIUON i34c2 tax deductible contribution $25 American Society Aerospace Education will help Society provide aviation/space education materials thousands teachers throughout country Foryour contribution will receive AVIATION/SPACE Magazine full year well Color Lithograph First Flight painting AVIATION/SPACE fascinating wide-ranging informative colorfully illustrated magazine published six times year AVIATION/SPACE helps keep up-to-date Whats being published whats happening aviation space As Special Gift AMA members ASAE wiil send contribute $25 before September 1 1982 Magnificent 20 olor Lithograph wright Brothers First Flight aviation artist wj Reynolds AMERICAN SOCIETY FOR AERO5PACE EDUCATION 1750 Penn Ave NW washington DC 20006 Name Addromn cityStateZi Fl i Enclose $ _____________ As Contribution Aerospace Education ASAE 0 Contribution Enclosed 0 Charge Credit Card VISAExpiration MASTERCARDDate _______________ Card # Signature suitable length linecausing spiral descent until weight hit ground allowing line slacken model recover land George Myers Radio Technique columnist related unhappy experience watching original sailplane floating out sight spool hanging wing George said just tightened up turn bit feels spirally unstable models can brought down system course weight might have done trick contest hesitate carry weight minimum required rules Robert Stuhr Shelby IA solved lack weight problem using C-cell battery instead spooL installation Thermal Thumber used 75 ft button carpet thread secured hole right wing tip just behind spar worked great Robert recently unearthed model battery bore legendplace service before July 1939 AT LAST! TOOL TO PULL SLEEVES AND BEARINGS EASILY AND WITHOUT DAMAGE MAKES ENGINE OVERHAUL PIECE OF CAKE EXPANDING RING SLIDE TAPPER SLEEVE PULLER FOR 60 SIZE ENGINES795 BEARING PULLER FOR 17MM BEARINGS695 Special Order Both For....... 1395 Send check MO include 505 UPS GATOR R/C PRODUCTS 3713 POMPANO DR AcOLA FL 32504 1904 4764639 160 Model Aviation PO Box 607 So Galatin Road Madison TN 37115 868-6311 Sales ice Complete line ROYAL Electronics R/C equipment WARRANTY repairs thing sell Call Ed Venus Brannan Repair Service HOBBY LOBBY EK LOGICTROL FUTABA HOBBY SHACK ROYAL i / s/ BLE SHOOTING HiNT NO 12 - EXCESS NOSE WEIGHT NAL PERSOKAUTY TRAINER GEMES BEAUTIFUL SUPER CHAMP THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts rubber bauds Complete kit $5495 dealer direct GEMINI MODELS INC PO Bo lien Passc NJ 07055 George Myers refers old Austin-Craft timer common use both ignition cutoff dethermalizing slow-leak air timer Doug Dahlke Oshkosh pressed air-leak timer double service using time DT release also using spool weight itself Doug used 70-ft line attach well-wrapped padded timer wingtip Thanks input folks columnists thrive Clarence E Haugh4 3226 Honeysuckle Dr RL 5 Box 16 Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 70 warm air layer top may take quite bit power model break out cooler air warm upper air As soon model gets warm air motor will absorb warmth surrounding air increase temperature will translated extra energy available motor addition air turbulent model will often upset will lose altitude flight time Building light models certain extent following remarks simplification ability build light models depends much tech nique does having super-light wood Briefly keep careful records weight part model various stages building After have flown first model see anything too weak can build part next model little bit lighter again keeping record weights After some part latest model will too light will break often point have discovered limits part model After have discovered light part models can resulting models will much lighter first models built After much practice limits likely outmoded since will have learned handle lighter models safely Washin washout two terms refer intentional wing twist warp Washin means leading edge half wing stab higher trailing edge surface twisted higher angle attack Washout just oppositewing twist reduces angle attack reasons having washin/washout adjust ments wing twofold control torque compensate turning flight think about model flying circle realize inboard wing tip traveling smaller circle outboard wing tip therefore actually flying slower Consequently derive same lift inboard wing necessary crease angle attack airfoil Washin will nicely same way can use reverse twist washout help reduce excess lift generated faster-flying outboard wing model designs minimize amount washin wash out required making inboard wing longer get extra lift having area inboard side model What about torque Torque reaction model twisting force applied propeller rubber motor STINS5~ VOYAGER Quarter Scale 2 oth Kits designed Quadra other 2 cycle engines Plywood & Softwood construction J $9950 Th BONZO Almost 1/3 Scale Sport Pylon Pattern Flying 60 Quadra Power Wing Span 54 1 Pc Shipping Charges Included US & Canada motor turns propeller clockwise also trying turn fuselage counterclockwise adds downward force inboard wing extra washin extra area combination two will help overcome force Thrust adjustments ability change angle thrust line line through prop shaft very useful adjusting Indoor models order able make adjust ment model must have double thrust bear ing prop shaft supported bearing front usually hook rear thrust bearing can bent otherwise adjusted prop shaft can made point some direction other straight forward Some fliers actually plan ahead build favorite thrust adjustments during construction distinctive sound air. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUE ORLANII PARK ILLINOIS 60462 Capabfe carrying 10 lbs cargo WingSpan 931/4 2pcs GIANT-SCALE PLANS Including Assembly Instructions Available J5 Airplanes Boats $1 795 SET -5 ENTERPRISES 4 Box 82 Belmont Ontario NOt iBO PflOne 1 5194440375 model example nearly always use least small amount left thrust may install after early test flights What benefit thrust adjustments Different adjustments take hold different times example turn installed rudder increases effectiveness model speed creases Turn caused stab tilt largely lowspeed adjustment thrust line adjustments have greatest effect thrust high problem Indoor models have tendency turn open up get wider during power burst Much problem comes fact tightly wound motor distorts modeL major effects Easy Btype models motor stick twists lot sometimes causes reverse stab tilt September 1 982 161 BIG BEAUTIFUL AIRPLANES LOADMASTER 0
Edition: Model Aviation - 1982/09
Page Numbers: 69, 158, 159, 160, 161
Free Flight OLD- TIMER Clarence Haught RUBBER POWER mainstay Old-Timer activity undoubtedly Gas model Earlier Old-Timer revival activity centered around ignition engine late more entries events showing up other disciplines Towline Hand-Launched Glider definitely Rubber isnt cost gasoline ignition engine availability has brought about change direction enjoyment Rubber flying itselfl recent survey National Free Flight Society should memben write NFFS 707 2nd St Davis CA 95616 indicates Rubber Power categories growing leaps bounds Keeping mind Free Flighters multi-interest stuck column showing between 11% 50% interest activity Hand-Launched Glider highest FF Power second FF Old-Timer third Rubber Power tying Scale fourth place FAI events holding down 12th 13th 14th places Fifth place went Indoor least half Rubber So arent Rubber Power Chances its prop carving thats holding back say prop carving builds character Well Ive seen some Old-Timer event rye attended prop carving has around lot longer Gas models early Gas props hand-carved Anyhow Continued page 158 PROPELLER BLOCK LAYOUT I D SMY liZ D 314XD XT SW, P H De DIAMEKR T b SLOCK THCKNESS W ULOCK WIDTH W can use layout formula carve high-quality Rubber prop Prop carving actually fairly simple task once youve laid out blank right rough-cut blank designed per drawing formula given month Carvethe bottom surfacefirat slight bit 1/16 1/s-in undercamber trim blade proper outline using pattern carve top surface sure carve blade pitch direction rotation want kits olden days featured machine-carved prop blanks efficient system did allow modelerto whittle reasonably good prop minimum effort very little time Sandpapering blank often enough Theres still source blanks Full info column September 1982 69 1 Some sample hand-carved props twin pusher top uses right-rotation leftrotation prop little center special small-diameter high-pitch job Scale model short landing gear bottom see one-bladed folderfora Korda hickeyon side no blade counterbalance weight FT BANK RIC DISTRIBUTORS 19 So Brett Street Beacon N V 12508 Hours Mon Sat 914 831-121410 am -9 pm U T[ f11 1-ml *SALI* FP-6FN $17500 Wj4S-26 S26 servo $2195 L Shipping & Handling $300 Please add $200 000 Service Sorry no Foreign Orders Personal checks will held clearance N Y State Residents must add local sales tax Price subject change notice Send long SASE complete listing JET HAWK F4 PHANTOM F-15 EAGLE HUN DERBIRD REVENGER TIGER AlL II TLAS BOOTLEGGER COM EIWLR ZLI -50 L LASER 2 01WP-63 IN OBR N AGL EIlJtIATI FLY RPJPE UICBIRJ TAYAWKF HA4T AGLTVYNOERBIRD RI ENG ERIF rAr1V ATLAS BOOTLEGGE OMNATOR ZLIN Z 50L LASER 20 YAN STA P 53 FLYING TIG P PLANE JAN ourLocal QeaIerSefld$1OoforCataIog -V vivr thing about US FF Champs irks extreme trophy winners simply dont show up collect awards sure guy has set sorts records particular event won sorts first-place trophies event doesnt feel strong personal incentive come forward collect third- fifth-place trophy guy collect first-place trophy having picture taken Joe Hero down third-place box might greatest thing life first-place box once US FF Champsit isnt likely will happen again Joe Hero didnt make appearance receive lower-place award hurt mean hurt collecting lesser-place trophies can regard just plain downhome bad manners scarcely befitting Free Flighters Since appears same bunch con testants come back year after year same things time youd think FF Champs would getting old hat However rd willing bet almost 300 participated year will back next time over againbut maybe just little betterand time afterthat and. FF Old-Timers H aught Continued page 69 lots good information around dis covered proven old guys Rubber-power props usually large dia meter slow-turning Diameters usually range one-third one-half models wingspan Such large-diameter slow-turning prop needs considerable pitch effective Pitch although related blade angle angle distance propeller would advance revolution through solid Air being gas allows considerable slippage resulting loss efficiency pitch diameter go together loading power plant rubber Getting proper combination pitch dia meter motor key good power per formance Proper pitch-to-diameter expressed ratio Pitch-diameter ratio lA-to-1 1-to-i have proven out through experience about right Thus P-D ratio 1 -to-i figures out 30 pitch 20 diameter carve prop desired pitch simple formula devised back Thirties tells us Pitch equals product 314 times diameter times thickness block divided Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airpane- 4 Marine K&B FUELSKaB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER KaB SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS 1 U.F1 Ii~UEI sB 158 Model Aviation ii~ ___________1 Njil H obby ii arn WE ARE PLEASED TO ANNOUNCE acquisition Hal Osborne Plans Service Included over 148 exceptionally high quality Scale plans E drawings Coeplete list 88 PP see below COMING SOON eapect have Partial Kit Snow White Antique Gas Model 1938 available near future pro duced Gene Wallock P del Service Price Availability date known tine Watch ad inforwation OLD TIMER KITS Partial Full Kits P & W Semi Kits--Cut Partt Kits--Machine GuI t939 Comet Zipper 54 Span plan md price $3380 1938 Trenton Terror 72 plan md price $2080 1936 Serketey Buccaneer 84plan Inel price $2550 Other P & 16 Semi Kits available Plan md Price t838 Comet Clipper BK $8925 1933 Dallaire Sportster $3100 8938 Scientific Mercury $2088 0935 Mitt America $3158 1845 Playboy Jr $8700 8841 Playboy Sr. 2225 1938 Powerhouse $2508 8948 Ranger $1880 1848 Corset Sailplane $5058 1848 So Lang $8358 8939 Otorda Wakefield $8875 MIDWAY MODEL CO Full Partial Kits 1941 Air Trails Sportater 59 Full Kit $3586 1938 Pamerhauae 58 Span Pull Kit $3588 1936 Plying Quaker 84 Semi Kit plan mel $2158 1937 Quaker FlasIt 87 Semi Kit plan met $1758 1927 Long Cabin 78 Semi Kit plan md $2808 1948 Comet Sailplane 36 828 engines $1495 1935 Mitt America 28 828 engines $1285 Other Mfg Old Timer Kits--Fall Kits 1941 Playbay Senior Tyra 89 Span $4985 1938 Say Ridge Mike Tyro 48 Span849 $2895 1939 Korda liakefield 4Ka 44 Rubber $1658 NEW Playboy Sr 67 geared Electric Oss Special introductory Price Keg $4495- $3880 LEISURE 05 Geared Sys $18108 Special5••5$7590 ASTRO 075 XL Sys m/reducerReg $110 Spa58080 ASTIIO AC/DC Charger56995Speciaiaaesao$4758 LEISURE DIGITAL Charger $18 88Special" $7589 SHIPPING & HANDLING Up $808 add $158 $891 $2808 add $225 $881 $9588 add $309 $4581 $7880 add $358 over $7808 add $988 CA Addressees add 6$ taa Send MO Visa/MC9Eap Check allow up 38 days CK clearance COD Esact Charges plus $1 50 IldI Cash Only 88 Page CATALOGUE Plans list $280 [A copy will sent free--when requested-with orderI HOBBY HORN ashobby specialties PO Box 3004 Seal Beach Ca 98748 17141 894-6223 [Best sornings recarder--l activates 5 rings width block prop carved formula may solved unknown case factors established such available wood stock restricted diameter due landing gear length etc few quick mathe matical exercises will get information need After laying out block shown accompanying drawing cut away waste carve bottom surface surface should have slight undercamber1/16 mum long X-Acto carving blade sandpaper will trick Shape blade outlines next using template ensure match ing blades Carve top surface airfoil section thinner blade section efficient prop will bebut thinness sacrifices strength Speaking strength Old-Timers use folding props therefore subject prop potential damage landing Proper selection firm straight-grain baisa annular rings either vertical horixontal angledhelps does covering delicate blades silk dope Other woods work quite well Pine spruce makes excel lent prop slight increase weight often helps bring CG limits also pro vIdeo flywheel action Pine props can made thinner still retaining strength last precaution think about what doing before taking first cut quite easy come up left-hand prop carefuL course can always use twin pusher rest practice Buy block balsa start carving builds characters. er character Shrank Ocean Spirit St Louis 34 Wingspan Engines R/C RIC Scale Kil#119 $3195 oIler 22 FlighI-Capable Oesigns Send 506 Flyline Calalog Dealers ributors Welcomed Phone 703 573-2338 FLYLINE MODELS INC 2820 Oorr Ave K-i 1 Fairfax Virginia 22031 Machine-carved props have OT Rubber some time will recall machine carved props supplied popular kits blanks allowed builder finish up acceptable prop few minutes nothing some sandpaper perhaps penknife Joe Dill N 7215 Maher Court Spokane WA 99218 has uncovered supply original machinecarved prop blanks diameters 8 9 10 Joe will make available $200 postpaid props will get air short order current price balsa pretty good deal Update spool dethermalizers discussion spool dethermalizers brought some interesting comments readers actually employed system system may recall released weight spool attached wing tip H055YBt0EAWAY9088YHt7fAWAy908syBtofpsjAyssyNsrs4Ay FAMOUS BRITISH UC DIESELS AEROMODELLER PLANS ES M/E PAW D/C 2nd EDITION CATALOG-DIESEL HANDBOOK $350 pp HOBBY HIDEWAYDELAVANIL 5YHIOIAwAyHOSBYHI0owAyHossyHtoEAwAyW3eoyHIoAw m September 1982 159 $3995 KIT 112 651 Wingspan 19-40 Engine Foam Wing- Balsa Fuse Easy Picture Instructions Send Money Order- Pay UPS Ill Ret add 52 04 Tax GT MODELS Ph 217 895 4136 P0 Box 869 Rantoul III 61866 FREE SUBSCRIPTION & FREE PAINTING support AEROSPACE EDUCATION AVIUON i34c2 tax deductible contribution $25 American Society Aerospace Education will help Society provide aviation/space education materials thousands teachers throughout country Foryour contribution will receive AVIATION/SPACE Magazine full year well Color Lithograph First Flight painting AVIATION/SPACE fascinating wide-ranging informative colorfully illustrated magazine published six times year AVIATION/SPACE helps keep up-to-date Whats being published whats happening aviation space As Special Gift AMA members ASAE wiil send contribute $25 before September 1 1982 Magnificent 20 olor Lithograph wright Brothers First Flight aviation artist wj Reynolds AMERICAN SOCIETY FOR AERO5PACE EDUCATION 1750 Penn Ave NW washington DC 20006 Name Addromn cityStateZi Fl i Enclose $ _____________ As Contribution Aerospace Education ASAE 0 Contribution Enclosed 0 Charge Credit Card VISAExpiration MASTERCARDDate _______________ Card # Signature suitable length linecausing spiral descent until weight hit ground allowing line slacken model recover land George Myers Radio Technique columnist related unhappy experience watching original sailplane floating out sight spool hanging wing George said just tightened up turn bit feels spirally unstable models can brought down system course weight might have done trick contest hesitate carry weight minimum required rules Robert Stuhr Shelby IA solved lack weight problem using C-cell battery instead spooL installation Thermal Thumber used 75 ft button carpet thread secured hole right wing tip just behind spar worked great Robert recently unearthed model battery bore legendplace service before July 1939 AT LAST! TOOL TO PULL SLEEVES AND BEARINGS EASILY AND WITHOUT DAMAGE MAKES ENGINE OVERHAUL PIECE OF CAKE EXPANDING RING SLIDE TAPPER SLEEVE PULLER FOR 60 SIZE ENGINES795 BEARING PULLER FOR 17MM BEARINGS695 Special Order Both For....... 1395 Send check MO include 505 UPS GATOR R/C PRODUCTS 3713 POMPANO DR AcOLA FL 32504 1904 4764639 160 Model Aviation PO Box 607 So Galatin Road Madison TN 37115 868-6311 Sales ice Complete line ROYAL Electronics R/C equipment WARRANTY repairs thing sell Call Ed Venus Brannan Repair Service HOBBY LOBBY EK LOGICTROL FUTABA HOBBY SHACK ROYAL i / s/ BLE SHOOTING HiNT NO 12 - EXCESS NOSE WEIGHT NAL PERSOKAUTY TRAINER GEMES BEAUTIFUL SUPER CHAMP THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts rubber bauds Complete kit $5495 dealer direct GEMINI MODELS INC PO Bo lien Passc NJ 07055 George Myers refers old Austin-Craft timer common use both ignition cutoff dethermalizing slow-leak air timer Doug Dahlke Oshkosh pressed air-leak timer double service using time DT release also using spool weight itself Doug used 70-ft line attach well-wrapped padded timer wingtip Thanks input folks columnists thrive Clarence E Haugh4 3226 Honeysuckle Dr RL 5 Box 16 Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 70 warm air layer top may take quite bit power model break out cooler air warm upper air As soon model gets warm air motor will absorb warmth surrounding air increase temperature will translated extra energy available motor addition air turbulent model will often upset will lose altitude flight time Building light models certain extent following remarks simplification ability build light models depends much tech nique does having super-light wood Briefly keep careful records weight part model various stages building After have flown first model see anything too weak can build part next model little bit lighter again keeping record weights After some part latest model will too light will break often point have discovered limits part model After have discovered light part models can resulting models will much lighter first models built After much practice limits likely outmoded since will have learned handle lighter models safely Washin washout two terms refer intentional wing twist warp Washin means leading edge half wing stab higher trailing edge surface twisted higher angle attack Washout just oppositewing twist reduces angle attack reasons having washin/washout adjust ments wing twofold control torque compensate turning flight think about model flying circle realize inboard wing tip traveling smaller circle outboard wing tip therefore actually flying slower Consequently derive same lift inboard wing necessary crease angle attack airfoil Washin will nicely same way can use reverse twist washout help reduce excess lift generated faster-flying outboard wing model designs minimize amount washin wash out required making inboard wing longer get extra lift having area inboard side model What about torque Torque reaction model twisting force applied propeller rubber motor STINS5~ VOYAGER Quarter Scale 2 oth Kits designed Quadra other 2 cycle engines Plywood & Softwood construction J $9950 Th BONZO Almost 1/3 Scale Sport Pylon Pattern Flying 60 Quadra Power Wing Span 54 1 Pc Shipping Charges Included US & Canada motor turns propeller clockwise also trying turn fuselage counterclockwise adds downward force inboard wing extra washin extra area combination two will help overcome force Thrust adjustments ability change angle thrust line line through prop shaft very useful adjusting Indoor models order able make adjust ment model must have double thrust bear ing prop shaft supported bearing front usually hook rear thrust bearing can bent otherwise adjusted prop shaft can made point some direction other straight forward Some fliers actually plan ahead build favorite thrust adjustments during construction distinctive sound air. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUE ORLANII PARK ILLINOIS 60462 Capabfe carrying 10 lbs cargo WingSpan 931/4 2pcs GIANT-SCALE PLANS Including Assembly Instructions Available J5 Airplanes Boats $1 795 SET -5 ENTERPRISES 4 Box 82 Belmont Ontario NOt iBO PflOne 1 5194440375 model example nearly always use least small amount left thrust may install after early test flights What benefit thrust adjustments Different adjustments take hold different times example turn installed rudder increases effectiveness model speed creases Turn caused stab tilt largely lowspeed adjustment thrust line adjustments have greatest effect thrust high problem Indoor models have tendency turn open up get wider during power burst Much problem comes fact tightly wound motor distorts modeL major effects Easy Btype models motor stick twists lot sometimes causes reverse stab tilt September 1 982 161 BIG BEAUTIFUL AIRPLANES LOADMASTER 0
Edition: Model Aviation - 1982/09
Page Numbers: 69, 158, 159, 160, 161
Free Flight OLD- TIMER Clarence Haught RUBBER POWER mainstay Old-Timer activity undoubtedly Gas model Earlier Old-Timer revival activity centered around ignition engine late more entries events showing up other disciplines Towline Hand-Launched Glider definitely Rubber isnt cost gasoline ignition engine availability has brought about change direction enjoyment Rubber flying itselfl recent survey National Free Flight Society should memben write NFFS 707 2nd St Davis CA 95616 indicates Rubber Power categories growing leaps bounds Keeping mind Free Flighters multi-interest stuck column showing between 11% 50% interest activity Hand-Launched Glider highest FF Power second FF Old-Timer third Rubber Power tying Scale fourth place FAI events holding down 12th 13th 14th places Fifth place went Indoor least half Rubber So arent Rubber Power Chances its prop carving thats holding back say prop carving builds character Well Ive seen some Old-Timer event rye attended prop carving has around lot longer Gas models early Gas props hand-carved Anyhow Continued page 158 PROPELLER BLOCK LAYOUT I D SMY liZ D 314XD XT SW, P H De DIAMEKR T b SLOCK THCKNESS W ULOCK WIDTH W can use layout formula carve high-quality Rubber prop Prop carving actually fairly simple task once youve laid out blank right rough-cut blank designed per drawing formula given month Carvethe bottom surfacefirat slight bit 1/16 1/s-in undercamber trim blade proper outline using pattern carve top surface sure carve blade pitch direction rotation want kits olden days featured machine-carved prop blanks efficient system did allow modelerto whittle reasonably good prop minimum effort very little time Sandpapering blank often enough Theres still source blanks Full info column September 1982 69 1 Some sample hand-carved props twin pusher top uses right-rotation leftrotation prop little center special small-diameter high-pitch job Scale model short landing gear bottom see one-bladed folderfora Korda hickeyon side no blade counterbalance weight FT BANK RIC DISTRIBUTORS 19 So Brett Street Beacon N V 12508 Hours Mon Sat 914 831-121410 am -9 pm U T[ f11 1-ml *SALI* FP-6FN $17500 Wj4S-26 S26 servo $2195 L Shipping & Handling $300 Please add $200 000 Service Sorry no Foreign Orders Personal checks will held clearance N Y State Residents must add local sales tax Price subject change notice Send long SASE complete listing JET HAWK F4 PHANTOM F-15 EAGLE HUN DERBIRD REVENGER TIGER AlL II TLAS BOOTLEGGER COM EIWLR ZLI -50 L LASER 2 01WP-63 IN OBR N AGL EIlJtIATI FLY RPJPE UICBIRJ TAYAWKF HA4T AGLTVYNOERBIRD RI ENG ERIF rAr1V ATLAS BOOTLEGGE OMNATOR ZLIN Z 50L LASER 20 YAN STA P 53 FLYING TIG P PLANE JAN ourLocal QeaIerSefld$1OoforCataIog -V vivr thing about US FF Champs irks extreme trophy winners simply dont show up collect awards sure guy has set sorts records particular event won sorts first-place trophies event doesnt feel strong personal incentive come forward collect third- fifth-place trophy guy collect first-place trophy having picture taken Joe Hero down third-place box might greatest thing life first-place box once US FF Champsit isnt likely will happen again Joe Hero didnt make appearance receive lower-place award hurt mean hurt collecting lesser-place trophies can regard just plain downhome bad manners scarcely befitting Free Flighters Since appears same bunch con testants come back year after year same things time youd think FF Champs would getting old hat However rd willing bet almost 300 participated year will back next time over againbut maybe just little betterand time afterthat and. FF Old-Timers H aught Continued page 69 lots good information around dis covered proven old guys Rubber-power props usually large dia meter slow-turning Diameters usually range one-third one-half models wingspan Such large-diameter slow-turning prop needs considerable pitch effective Pitch although related blade angle angle distance propeller would advance revolution through solid Air being gas allows considerable slippage resulting loss efficiency pitch diameter go together loading power plant rubber Getting proper combination pitch dia meter motor key good power per formance Proper pitch-to-diameter expressed ratio Pitch-diameter ratio lA-to-1 1-to-i have proven out through experience about right Thus P-D ratio 1 -to-i figures out 30 pitch 20 diameter carve prop desired pitch simple formula devised back Thirties tells us Pitch equals product 314 times diameter times thickness block divided Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airpane- 4 Marine K&B FUELSKaB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER KaB SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS 1 U.F1 Ii~UEI sB 158 Model Aviation ii~ ___________1 Njil H obby ii arn WE ARE PLEASED TO ANNOUNCE acquisition Hal Osborne Plans Service Included over 148 exceptionally high quality Scale plans E drawings Coeplete list 88 PP see below COMING SOON eapect have Partial Kit Snow White Antique Gas Model 1938 available near future pro duced Gene Wallock P del Service Price Availability date known tine Watch ad inforwation OLD TIMER KITS Partial Full Kits P & W Semi Kits--Cut Partt Kits--Machine GuI t939 Comet Zipper 54 Span plan md price $3380 1938 Trenton Terror 72 plan md price $2080 1936 Serketey Buccaneer 84plan Inel price $2550 Other P & 16 Semi Kits available Plan md Price t838 Comet Clipper BK $8925 1933 Dallaire Sportster $3100 8938 Scientific Mercury $2088 0935 Mitt America $3158 1845 Playboy Jr $8700 8841 Playboy Sr. 2225 1938 Powerhouse $2508 8948 Ranger $1880 1848 Corset Sailplane $5058 1848 So Lang $8358 8939 Otorda Wakefield $8875 MIDWAY MODEL CO Full Partial Kits 1941 Air Trails Sportater 59 Full Kit $3586 1938 Pamerhauae 58 Span Pull Kit $3588 1936 Plying Quaker 84 Semi Kit plan mel $2158 1937 Quaker FlasIt 87 Semi Kit plan met $1758 1927 Long Cabin 78 Semi Kit plan md $2808 1948 Comet Sailplane 36 828 engines $1495 1935 Mitt America 28 828 engines $1285 Other Mfg Old Timer Kits--Fall Kits 1941 Playbay Senior Tyra 89 Span $4985 1938 Say Ridge Mike Tyro 48 Span849 $2895 1939 Korda liakefield 4Ka 44 Rubber $1658 NEW Playboy Sr 67 geared Electric Oss Special introductory Price Keg $4495- $3880 LEISURE 05 Geared Sys $18108 Special5••5$7590 ASTRO 075 XL Sys m/reducerReg $110 Spa58080 ASTIIO AC/DC Charger56995Speciaiaaesao$4758 LEISURE DIGITAL Charger $18 88Special" $7589 SHIPPING & HANDLING Up $808 add $158 $891 $2808 add $225 $881 $9588 add $309 $4581 $7880 add $358 over $7808 add $988 CA Addressees add 6$ taa Send MO Visa/MC9Eap Check allow up 38 days CK clearance COD Esact Charges plus $1 50 IldI Cash Only 88 Page CATALOGUE Plans list $280 [A copy will sent free--when requested-with orderI HOBBY HORN ashobby specialties PO Box 3004 Seal Beach Ca 98748 17141 894-6223 [Best sornings recarder--l activates 5 rings width block prop carved formula may solved unknown case factors established such available wood stock restricted diameter due landing gear length etc few quick mathe matical exercises will get information need After laying out block shown accompanying drawing cut away waste carve bottom surface surface should have slight undercamber1/16 mum long X-Acto carving blade sandpaper will trick Shape blade outlines next using template ensure match ing blades Carve top surface airfoil section thinner blade section efficient prop will bebut thinness sacrifices strength Speaking strength Old-Timers use folding props therefore subject prop potential damage landing Proper selection firm straight-grain baisa annular rings either vertical horixontal angledhelps does covering delicate blades silk dope Other woods work quite well Pine spruce makes excel lent prop slight increase weight often helps bring CG limits also pro vIdeo flywheel action Pine props can made thinner still retaining strength last precaution think about what doing before taking first cut quite easy come up left-hand prop carefuL course can always use twin pusher rest practice Buy block balsa start carving builds characters. er character Shrank Ocean Spirit St Louis 34 Wingspan Engines R/C RIC Scale Kil#119 $3195 oIler 22 FlighI-Capable Oesigns Send 506 Flyline Calalog Dealers ributors Welcomed Phone 703 573-2338 FLYLINE MODELS INC 2820 Oorr Ave K-i 1 Fairfax Virginia 22031 Machine-carved props have OT Rubber some time will recall machine carved props supplied popular kits blanks allowed builder finish up acceptable prop few minutes nothing some sandpaper perhaps penknife Joe Dill N 7215 Maher Court Spokane WA 99218 has uncovered supply original machinecarved prop blanks diameters 8 9 10 Joe will make available $200 postpaid props will get air short order current price balsa pretty good deal Update spool dethermalizers discussion spool dethermalizers brought some interesting comments readers actually employed system system may recall released weight spool attached wing tip H055YBt0EAWAY9088YHt7fAWAy908syBtofpsjAyssyNsrs4Ay FAMOUS BRITISH UC DIESELS AEROMODELLER PLANS ES M/E PAW D/C 2nd EDITION CATALOG-DIESEL HANDBOOK $350 pp HOBBY HIDEWAYDELAVANIL 5YHIOIAwAyHOSBYHI0owAyHossyHtoEAwAyW3eoyHIoAw m September 1982 159 $3995 KIT 112 651 Wingspan 19-40 Engine Foam Wing- Balsa Fuse Easy Picture Instructions Send Money Order- Pay UPS Ill Ret add 52 04 Tax GT MODELS Ph 217 895 4136 P0 Box 869 Rantoul III 61866 FREE SUBSCRIPTION & FREE PAINTING support AEROSPACE EDUCATION AVIUON i34c2 tax deductible contribution $25 American Society Aerospace Education will help Society provide aviation/space education materials thousands teachers throughout country Foryour contribution will receive AVIATION/SPACE Magazine full year well Color Lithograph First Flight painting AVIATION/SPACE fascinating wide-ranging informative colorfully illustrated magazine published six times year AVIATION/SPACE helps keep up-to-date Whats being published whats happening aviation space As Special Gift AMA members ASAE wiil send contribute $25 before September 1 1982 Magnificent 20 olor Lithograph wright Brothers First Flight aviation artist wj Reynolds AMERICAN SOCIETY FOR AERO5PACE EDUCATION 1750 Penn Ave NW washington DC 20006 Name Addromn cityStateZi Fl i Enclose $ _____________ As Contribution Aerospace Education ASAE 0 Contribution Enclosed 0 Charge Credit Card VISAExpiration MASTERCARDDate _______________ Card # Signature suitable length linecausing spiral descent until weight hit ground allowing line slacken model recover land George Myers Radio Technique columnist related unhappy experience watching original sailplane floating out sight spool hanging wing George said just tightened up turn bit feels spirally unstable models can brought down system course weight might have done trick contest hesitate carry weight minimum required rules Robert Stuhr Shelby IA solved lack weight problem using C-cell battery instead spooL installation Thermal Thumber used 75 ft button carpet thread secured hole right wing tip just behind spar worked great Robert recently unearthed model battery bore legendplace service before July 1939 AT LAST! TOOL TO PULL SLEEVES AND BEARINGS EASILY AND WITHOUT DAMAGE MAKES ENGINE OVERHAUL PIECE OF CAKE EXPANDING RING SLIDE TAPPER SLEEVE PULLER FOR 60 SIZE ENGINES795 BEARING PULLER FOR 17MM BEARINGS695 Special Order Both For....... 1395 Send check MO include 505 UPS GATOR R/C PRODUCTS 3713 POMPANO DR AcOLA FL 32504 1904 4764639 160 Model Aviation PO Box 607 So Galatin Road Madison TN 37115 868-6311 Sales ice Complete line ROYAL Electronics R/C equipment WARRANTY repairs thing sell Call Ed Venus Brannan Repair Service HOBBY LOBBY EK LOGICTROL FUTABA HOBBY SHACK ROYAL i / s/ BLE SHOOTING HiNT NO 12 - EXCESS NOSE WEIGHT NAL PERSOKAUTY TRAINER GEMES BEAUTIFUL SUPER CHAMP THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts rubber bauds Complete kit $5495 dealer direct GEMINI MODELS INC PO Bo lien Passc NJ 07055 George Myers refers old Austin-Craft timer common use both ignition cutoff dethermalizing slow-leak air timer Doug Dahlke Oshkosh pressed air-leak timer double service using time DT release also using spool weight itself Doug used 70-ft line attach well-wrapped padded timer wingtip Thanks input folks columnists thrive Clarence E Haugh4 3226 Honeysuckle Dr RL 5 Box 16 Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 70 warm air layer top may take quite bit power model break out cooler air warm upper air As soon model gets warm air motor will absorb warmth surrounding air increase temperature will translated extra energy available motor addition air turbulent model will often upset will lose altitude flight time Building light models certain extent following remarks simplification ability build light models depends much tech nique does having super-light wood Briefly keep careful records weight part model various stages building After have flown first model see anything too weak can build part next model little bit lighter again keeping record weights After some part latest model will too light will break often point have discovered limits part model After have discovered light part models can resulting models will much lighter first models built After much practice limits likely outmoded since will have learned handle lighter models safely Washin washout two terms refer intentional wing twist warp Washin means leading edge half wing stab higher trailing edge surface twisted higher angle attack Washout just oppositewing twist reduces angle attack reasons having washin/washout adjust ments wing twofold control torque compensate turning flight think about model flying circle realize inboard wing tip traveling smaller circle outboard wing tip therefore actually flying slower Consequently derive same lift inboard wing necessary crease angle attack airfoil Washin will nicely same way can use reverse twist washout help reduce excess lift generated faster-flying outboard wing model designs minimize amount washin wash out required making inboard wing longer get extra lift having area inboard side model What about torque Torque reaction model twisting force applied propeller rubber motor STINS5~ VOYAGER Quarter Scale 2 oth Kits designed Quadra other 2 cycle engines Plywood & Softwood construction J $9950 Th BONZO Almost 1/3 Scale Sport Pylon Pattern Flying 60 Quadra Power Wing Span 54 1 Pc Shipping Charges Included US & Canada motor turns propeller clockwise also trying turn fuselage counterclockwise adds downward force inboard wing extra washin extra area combination two will help overcome force Thrust adjustments ability change angle thrust line line through prop shaft very useful adjusting Indoor models order able make adjust ment model must have double thrust bear ing prop shaft supported bearing front usually hook rear thrust bearing can bent otherwise adjusted prop shaft can made point some direction other straight forward Some fliers actually plan ahead build favorite thrust adjustments during construction distinctive sound air. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUE ORLANII PARK ILLINOIS 60462 Capabfe carrying 10 lbs cargo WingSpan 931/4 2pcs GIANT-SCALE PLANS Including Assembly Instructions Available J5 Airplanes Boats $1 795 SET -5 ENTERPRISES 4 Box 82 Belmont Ontario NOt iBO PflOne 1 5194440375 model example nearly always use least small amount left thrust may install after early test flights What benefit thrust adjustments Different adjustments take hold different times example turn installed rudder increases effectiveness model speed creases Turn caused stab tilt largely lowspeed adjustment thrust line adjustments have greatest effect thrust high problem Indoor models have tendency turn open up get wider during power burst Much problem comes fact tightly wound motor distorts modeL major effects Easy Btype models motor stick twists lot sometimes causes reverse stab tilt September 1 982 161 BIG BEAUTIFUL AIRPLANES LOADMASTER 0
Edition: Model Aviation - 1982/09
Page Numbers: 69, 158, 159, 160, 161
Free Flight OLD- TIMER Clarence Haught RUBBER POWER mainstay Old-Timer activity undoubtedly Gas model Earlier Old-Timer revival activity centered around ignition engine late more entries events showing up other disciplines Towline Hand-Launched Glider definitely Rubber isnt cost gasoline ignition engine availability has brought about change direction enjoyment Rubber flying itselfl recent survey National Free Flight Society should memben write NFFS 707 2nd St Davis CA 95616 indicates Rubber Power categories growing leaps bounds Keeping mind Free Flighters multi-interest stuck column showing between 11% 50% interest activity Hand-Launched Glider highest FF Power second FF Old-Timer third Rubber Power tying Scale fourth place FAI events holding down 12th 13th 14th places Fifth place went Indoor least half Rubber So arent Rubber Power Chances its prop carving thats holding back say prop carving builds character Well Ive seen some Old-Timer event rye attended prop carving has around lot longer Gas models early Gas props hand-carved Anyhow Continued page 158 PROPELLER BLOCK LAYOUT I D SMY liZ D 314XD XT SW, P H De DIAMEKR T b SLOCK THCKNESS W ULOCK WIDTH W can use layout formula carve high-quality Rubber prop Prop carving actually fairly simple task once youve laid out blank right rough-cut blank designed per drawing formula given month Carvethe bottom surfacefirat slight bit 1/16 1/s-in undercamber trim blade proper outline using pattern carve top surface sure carve blade pitch direction rotation want kits olden days featured machine-carved prop blanks efficient system did allow modelerto whittle reasonably good prop minimum effort very little time Sandpapering blank often enough Theres still source blanks Full info column September 1982 69 1 Some sample hand-carved props twin pusher top uses right-rotation leftrotation prop little center special small-diameter high-pitch job Scale model short landing gear bottom see one-bladed folderfora Korda hickeyon side no blade counterbalance weight FT BANK RIC DISTRIBUTORS 19 So Brett Street Beacon N V 12508 Hours Mon Sat 914 831-121410 am -9 pm U T[ f11 1-ml *SALI* FP-6FN $17500 Wj4S-26 S26 servo $2195 L Shipping & Handling $300 Please add $200 000 Service Sorry no Foreign Orders Personal checks will held clearance N Y State Residents must add local sales tax Price subject change notice Send long SASE complete listing JET HAWK F4 PHANTOM F-15 EAGLE HUN DERBIRD REVENGER TIGER AlL II TLAS BOOTLEGGER COM EIWLR ZLI -50 L LASER 2 01WP-63 IN OBR N AGL EIlJtIATI FLY RPJPE UICBIRJ TAYAWKF HA4T AGLTVYNOERBIRD RI ENG ERIF rAr1V ATLAS BOOTLEGGE OMNATOR ZLIN Z 50L LASER 20 YAN STA P 53 FLYING TIG P PLANE JAN ourLocal QeaIerSefld$1OoforCataIog -V vivr thing about US FF Champs irks extreme trophy winners simply dont show up collect awards sure guy has set sorts records particular event won sorts first-place trophies event doesnt feel strong personal incentive come forward collect third- fifth-place trophy guy collect first-place trophy having picture taken Joe Hero down third-place box might greatest thing life first-place box once US FF Champsit isnt likely will happen again Joe Hero didnt make appearance receive lower-place award hurt mean hurt collecting lesser-place trophies can regard just plain downhome bad manners scarcely befitting Free Flighters Since appears same bunch con testants come back year after year same things time youd think FF Champs would getting old hat However rd willing bet almost 300 participated year will back next time over againbut maybe just little betterand time afterthat and. FF Old-Timers H aught Continued page 69 lots good information around dis covered proven old guys Rubber-power props usually large dia meter slow-turning Diameters usually range one-third one-half models wingspan Such large-diameter slow-turning prop needs considerable pitch effective Pitch although related blade angle angle distance propeller would advance revolution through solid Air being gas allows considerable slippage resulting loss efficiency pitch diameter go together loading power plant rubber Getting proper combination pitch dia meter motor key good power per formance Proper pitch-to-diameter expressed ratio Pitch-diameter ratio lA-to-1 1-to-i have proven out through experience about right Thus P-D ratio 1 -to-i figures out 30 pitch 20 diameter carve prop desired pitch simple formula devised back Thirties tells us Pitch equals product 314 times diameter times thickness block divided Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airpane- 4 Marine K&B FUELSKaB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER KaB SUPER POSY RESIN K&B SUPER POSY THINNER K&B SUPER POSY PRIMER K&B SUPER POSY PAINT K&B MIXING CUPS 1 U.F1 Ii~UEI sB 158 Model Aviation ii~ ___________1 Njil H obby ii arn WE ARE PLEASED TO ANNOUNCE acquisition Hal Osborne Plans Service Included over 148 exceptionally high quality Scale plans E drawings Coeplete list 88 PP see below COMING SOON eapect have Partial Kit Snow White Antique Gas Model 1938 available near future pro duced Gene Wallock P del Service Price Availability date known tine Watch ad inforwation OLD TIMER KITS Partial Full Kits P & W Semi Kits--Cut Partt Kits--Machine GuI t939 Comet Zipper 54 Span plan md price $3380 1938 Trenton Terror 72 plan md price $2080 1936 Serketey Buccaneer 84plan Inel price $2550 Other P & 16 Semi Kits available Plan md Price t838 Comet Clipper BK $8925 1933 Dallaire Sportster $3100 8938 Scientific Mercury $2088 0935 Mitt America $3158 1845 Playboy Jr $8700 8841 Playboy Sr. 2225 1938 Powerhouse $2508 8948 Ranger $1880 1848 Corset Sailplane $5058 1848 So Lang $8358 8939 Otorda Wakefield $8875 MIDWAY MODEL CO Full Partial Kits 1941 Air Trails Sportater 59 Full Kit $3586 1938 Pamerhauae 58 Span Pull Kit $3588 1936 Plying Quaker 84 Semi Kit plan mel $2158 1937 Quaker FlasIt 87 Semi Kit plan met $1758 1927 Long Cabin 78 Semi Kit plan md $2808 1948 Comet Sailplane 36 828 engines $1495 1935 Mitt America 28 828 engines $1285 Other Mfg Old Timer Kits--Fall Kits 1941 Playbay Senior Tyra 89 Span $4985 1938 Say Ridge Mike Tyro 48 Span849 $2895 1939 Korda liakefield 4Ka 44 Rubber $1658 NEW Playboy Sr 67 geared Electric Oss Special introductory Price Keg $4495- $3880 LEISURE 05 Geared Sys $18108 Special5••5$7590 ASTRO 075 XL Sys m/reducerReg $110 Spa58080 ASTIIO AC/DC Charger56995Speciaiaaesao$4758 LEISURE DIGITAL Charger $18 88Special" $7589 SHIPPING & HANDLING Up $808 add $158 $891 $2808 add $225 $881 $9588 add $309 $4581 $7880 add $358 over $7808 add $988 CA Addressees add 6$ taa Send MO Visa/MC9Eap Check allow up 38 days CK clearance COD Esact Charges plus $1 50 IldI Cash Only 88 Page CATALOGUE Plans list $280 [A copy will sent free--when requested-with orderI HOBBY HORN ashobby specialties PO Box 3004 Seal Beach Ca 98748 17141 894-6223 [Best sornings recarder--l activates 5 rings width block prop carved formula may solved unknown case factors established such available wood stock restricted diameter due landing gear length etc few quick mathe matical exercises will get information need After laying out block shown accompanying drawing cut away waste carve bottom surface surface should have slight undercamber1/16 mum long X-Acto carving blade sandpaper will trick Shape blade outlines next using template ensure match ing blades Carve top surface airfoil section thinner blade section efficient prop will bebut thinness sacrifices strength Speaking strength Old-Timers use folding props therefore subject prop potential damage landing Proper selection firm straight-grain baisa annular rings either vertical horixontal angledhelps does covering delicate blades silk dope Other woods work quite well Pine spruce makes excel lent prop slight increase weight often helps bring CG limits also pro vIdeo flywheel action Pine props can made thinner still retaining strength last precaution think about what doing before taking first cut quite easy come up left-hand prop carefuL course can always use twin pusher rest practice Buy block balsa start carving builds characters. er character Shrank Ocean Spirit St Louis 34 Wingspan Engines R/C RIC Scale Kil#119 $3195 oIler 22 FlighI-Capable Oesigns Send 506 Flyline Calalog Dealers ributors Welcomed Phone 703 573-2338 FLYLINE MODELS INC 2820 Oorr Ave K-i 1 Fairfax Virginia 22031 Machine-carved props have OT Rubber some time will recall machine carved props supplied popular kits blanks allowed builder finish up acceptable prop few minutes nothing some sandpaper perhaps penknife Joe Dill N 7215 Maher Court Spokane WA 99218 has uncovered supply original machinecarved prop blanks diameters 8 9 10 Joe will make available $200 postpaid props will get air short order current price balsa pretty good deal Update spool dethermalizers discussion spool dethermalizers brought some interesting comments readers actually employed system system may recall released weight spool attached wing tip H055YBt0EAWAY9088YHt7fAWAy908syBtofpsjAyssyNsrs4Ay FAMOUS BRITISH UC DIESELS AEROMODELLER PLANS ES M/E PAW D/C 2nd EDITION CATALOG-DIESEL HANDBOOK $350 pp HOBBY HIDEWAYDELAVANIL 5YHIOIAwAyHOSBYHI0owAyHossyHtoEAwAyW3eoyHIoAw m September 1982 159 $3995 KIT 112 651 Wingspan 19-40 Engine Foam Wing- Balsa Fuse Easy Picture Instructions Send Money Order- Pay UPS Ill Ret add 52 04 Tax GT MODELS Ph 217 895 4136 P0 Box 869 Rantoul III 61866 FREE SUBSCRIPTION & FREE PAINTING support AEROSPACE EDUCATION AVIUON i34c2 tax deductible contribution $25 American Society Aerospace Education will help Society provide aviation/space education materials thousands teachers throughout country Foryour contribution will receive AVIATION/SPACE Magazine full year well Color Lithograph First Flight painting AVIATION/SPACE fascinating wide-ranging informative colorfully illustrated magazine published six times year AVIATION/SPACE helps keep up-to-date Whats being published whats happening aviation space As Special Gift AMA members ASAE wiil send contribute $25 before September 1 1982 Magnificent 20 olor Lithograph wright Brothers First Flight aviation artist wj Reynolds AMERICAN SOCIETY FOR AERO5PACE EDUCATION 1750 Penn Ave NW washington DC 20006 Name Addromn cityStateZi Fl i Enclose $ _____________ As Contribution Aerospace Education ASAE 0 Contribution Enclosed 0 Charge Credit Card VISAExpiration MASTERCARDDate _______________ Card # Signature suitable length linecausing spiral descent until weight hit ground allowing line slacken model recover land George Myers Radio Technique columnist related unhappy experience watching original sailplane floating out sight spool hanging wing George said just tightened up turn bit feels spirally unstable models can brought down system course weight might have done trick contest hesitate carry weight minimum required rules Robert Stuhr Shelby IA solved lack weight problem using C-cell battery instead spooL installation Thermal Thumber used 75 ft button carpet thread secured hole right wing tip just behind spar worked great Robert recently unearthed model battery bore legendplace service before July 1939 AT LAST! TOOL TO PULL SLEEVES AND BEARINGS EASILY AND WITHOUT DAMAGE MAKES ENGINE OVERHAUL PIECE OF CAKE EXPANDING RING SLIDE TAPPER SLEEVE PULLER FOR 60 SIZE ENGINES795 BEARING PULLER FOR 17MM BEARINGS695 Special Order Both For....... 1395 Send check MO include 505 UPS GATOR R/C PRODUCTS 3713 POMPANO DR AcOLA FL 32504 1904 4764639 160 Model Aviation PO Box 607 So Galatin Road Madison TN 37115 868-6311 Sales ice Complete line ROYAL Electronics R/C equipment WARRANTY repairs thing sell Call Ed Venus Brannan Repair Service HOBBY LOBBY EK LOGICTROL FUTABA HOBBY SHACK ROYAL i / s/ BLE SHOOTING HiNT NO 12 - EXCESS NOSE WEIGHT NAL PERSOKAUTY TRAINER GEMES BEAUTIFUL SUPER CHAMP THE BEGINNERS KIlTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts rubber bauds Complete kit $5495 dealer direct GEMINI MODELS INC PO Bo lien Passc NJ 07055 George Myers refers old Austin-Craft timer common use both ignition cutoff dethermalizing slow-leak air timer Doug Dahlke Oshkosh pressed air-leak timer double service using time DT release also using spool weight itself Doug used 70-ft line attach well-wrapped padded timer wingtip Thanks input folks columnists thrive Clarence E Haugh4 3226 Honeysuckle Dr RL 5 Box 16 Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 70 warm air layer top may take quite bit power model break out cooler air warm upper air As soon model gets warm air motor will absorb warmth surrounding air increase temperature will translated extra energy available motor addition air turbulent model will often upset will lose altitude flight time Building light models certain extent following remarks simplification ability build light models depends much tech nique does having super-light wood Briefly keep careful records weight part model various stages building After have flown first model see anything too weak can build part next model little bit lighter again keeping record weights After some part latest model will too light will break often point have discovered limits part model After have discovered light part models can resulting models will much lighter first models built After much practice limits likely outmoded since will have learned handle lighter models safely Washin washout two terms refer intentional wing twist warp Washin means leading edge half wing stab higher trailing edge surface twisted higher angle attack Washout just oppositewing twist reduces angle attack reasons having washin/washout adjust ments wing twofold control torque compensate turning flight think about model flying circle realize inboard wing tip traveling smaller circle outboard wing tip therefore actually flying slower Consequently derive same lift inboard wing necessary crease angle attack airfoil Washin will nicely same way can use reverse twist washout help reduce excess lift generated faster-flying outboard wing model designs minimize amount washin wash out required making inboard wing longer get extra lift having area inboard side model What about torque Torque reaction model twisting force applied propeller rubber motor STINS5~ VOYAGER Quarter Scale 2 oth Kits designed Quadra other 2 cycle engines Plywood & Softwood construction J $9950 Th BONZO Almost 1/3 Scale Sport Pylon Pattern Flying 60 Quadra Power Wing Span 54 1 Pc Shipping Charges Included US & Canada motor turns propeller clockwise also trying turn fuselage counterclockwise adds downward force inboard wing extra washin extra area combination two will help overcome force Thrust adjustments ability change angle thrust line line through prop shaft very useful adjusting Indoor models order able make adjust ment model must have double thrust bear ing prop shaft supported bearing front usually hook rear thrust bearing can bent otherwise adjusted prop shaft can made point some direction other straight forward Some fliers actually plan ahead build favorite thrust adjustments during construction distinctive sound air. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUE ORLANII PARK ILLINOIS 60462 Capabfe carrying 10 lbs cargo WingSpan 931/4 2pcs GIANT-SCALE PLANS Including Assembly Instructions Available J5 Airplanes Boats $1 795 SET -5 ENTERPRISES 4 Box 82 Belmont Ontario NOt iBO PflOne 1 5194440375 model example nearly always use least small amount left thrust may install after early test flights What benefit thrust adjustments Different adjustments take hold different times example turn installed rudder increases effectiveness model speed creases Turn caused stab tilt largely lowspeed adjustment thrust line adjustments have greatest effect thrust high problem Indoor models have tendency turn open up get wider during power burst Much problem comes fact tightly wound motor distorts modeL major effects Easy Btype models motor stick twists lot sometimes causes reverse stab tilt September 1 982 161 BIG BEAUTIFUL AIRPLANES LOADMASTER 0