Contml Line Scale Bill Boss BACK TO BASICS three-line con trol system appears time time have go back square talk about some very basic things Control Line flying us have building flying CL models years sometimes forget beginners might doing something first time Such case James Griffin Philadelphia PA just getting Scale modeling use threeline control system James problem related fact could get three-line system operate through full range control leaving slack lines positioned high- low-speed ex tremes After reading letter think ing about what written appeared problem having three lines equal length models control lead third line did have proper length create balanced system Now have set stage let go back start basics three-line system try point out some problem areas can encountered accompanying siketch shows typical three-line system used Control Line fliers years system composed con trol handle three lines models control unit control handle has built-in cam action allows movement elevator power-control leads opposite directions finger trigger operating lever top handle moved through its operating range control lines can stranded solid type appropriate thickness size weight model ac LEADOUTS LOW SPEEt HIGH SPEE HANDLE 3LINE CONTROL wellbuilt properly operating 3llne control system essential fog satisfactory performance Scale models Haying problems may caused failure follow basic construction guidelines using mismatched components Bill has quite few good tips type control system months column cordane Academy Model Aero nautics AMA safety rules regula tions models control unit comple ments control handle moves accordance amount travel handles third center line control handles units sup plied present time two manu facturers LR-Products Ltd formerly G-S Products 7787 Archdale Ave Detroit MI 48228 Sturdi-Built Continued page 150 64Model Aviation s B26 Invaders work Jake Chichilitti San Mateo CA notl built Comet stickand-tissue kits powered Cox Golden Bee 049s Covering sheet balsa plywood used beef up gear engine mountings Control via cutdown J Roberts 3llne system Waco b Bob Newman British Columbia CanadaL Ryan STA R Dave Mullens Seattle WA seen Eugene OR egionals entered Precision Scale event Waco based Dave Platt kit Both models powered 6Osize engines Ryan STA engine overheating problems discussed July 1983 column problem has overcome Dave has great success during 1984 Photos Bob Parker MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/z inches tall large 10 oz capacity its real attention getter definite collectors piece years come OAIyPlus $200 postage handling per order $695 60 CA residents add sales tax MOD-LER AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 02B4-40x5/8l2Pk$ 90 No 0384-40 x 3/412 Pk$100 No 07B6-32 x 3/412 Pk$110 No 0886-32 x 112 Pk$120 No 1188-32 x 1-1/212 Pk$155 BLIND NUTS ANDLOCK NUTS No 1284-40 Blind12 Pk$ 95 No 1486-32 Blind12 Pk$1 10 No 15B8-32 Blind12 Pk$1 25 No 1684-40 Lock12 Pk$ 45 No 1886-32 Lock12 Pk$ 50 No 1988-32 Lock12 Pk$ 55 $ 80 $90 $110 $135 $2 10 $2 50 $298 NYLON WINO BOLTS No2088-32 x 112Pk No2188-32 x 1-1/212Pk No23810-32 1-1/412Pk No24810-32 x 1-1/212Pk No2681/4-20 1-1/212Pk No2881/4-20x 212Pk No3081/4-20 x 312Pk PROPSToPPER 45ASturdy flexible vinyl plastic finger guard Protects against cuts andbruises starting engine Package contains 1 small 1 medium 1 large$1 50 SILICONE FUEL TUBING 60A3/32 Small Medium 3 Ft$1 75 61A1 8 Medium Large 3 Ft$1 89 MODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 $1200 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax Os cash add $125 Z7 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inQuiries welcome REPLACEMENT PARTS FOR Kr ft Engines T.torI McCoy Talpan 40 MJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available decades ago Lindley proposes Stout Trophy previously awarded Cabin awarded Manhattan Cabin good idea properly part rule book Indoor Rubber-Powered Ornithopter Two proposals have proposed identical proposed Free Flight Ornithopter event endeth discussion rules proposals Bob Meuser 4200 Gregory St Oakland CA 94619 CL Scale/Boss Continued page 64 4203 S Cloverdale Rd Boise ID 83705 provides J Roberts Flight Con trol system Both systems work equally well long put together cor rectly using matched parts supplied manufacturer Both systems work exactly same principle move control lever handle models control unit moved equal amount thus providing means con trol throttle drop bombs operate retracting landing gear system what ever As stated before putting com ponents together correctly key successfully-operating system must observe some basic instruc tions making-up either system three lines between handle model must equal length models control third-line leadout must 2Y longer elevator leadouts Please note 2% meas urement must made elevator leadouts pulled tight would systems high-speed position held other refer sketch system built just stated should have perfectly balanced system maintains equal tension three lines operated through entire control range preceding explanation based premise control handle model unit same manufac turer make distinction because IS pry rroeenJor 2 THERMD MOLDEDSTRONG. OT y METAL FRAMEGREAT GIFT X 2FILLED9s12x52 Sd SOS .f 1 Transmitter ection Case PRICE $35 inclode 5hppn5 & Hcnding n us CA es odd 6 Send check o no e V ERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 X principle operation two systems same basic dif ference between difference amount travel control lead third line J Roberts Flight System has travel approximately 1 LR-Products units have travel ap proximately 1% difference / between two systems mix sys tem components must take con sideration difference travel possibility improper operation system use J Roberts handle LR control unit will able obtain maximum travel available LR unit case would have sure plan operational func tions accordingly reverse situa tion use LR handle Sturdi Built control unit control lead has travel models control unit situation could result slack eleva tor lines handle forced its max imum travel case could flying putting full weight model control third line caus ing unsafe condition As can see care must taken selecting compo nents system mix different makes components aware pit falls make appropriate adjustments few additional notes models control units made two forms upright suspended providing choice mounting often used two types upright unit installation profile full-bodied models including Sport Scale models cockpit detail little importance However youre building Precision Scale model concerned about hiding control unit full cockpit floor maximum detail can installed mounting unit lower half wings thickness could answer addition knowing control system operates care must taken during systems installation make sure components work smoothly no binding especially leadouts pass Continued page 152 150Model Aviation RJL Industries ox 5654 dena CA 91107 Phone 1818J 359-0016 COITIOLIII TillS PROFILE0COMBA 7RA T WIDE & NARROW WEDGE UNIFLOW Capacities & SUNDD Cuutrn D1IDA huh Ingredients detailed hochureSOC stamps/check oni CAROLINA-TAFFINDER 8346 Delhi Road Charleston Hgts SC 29410 803553-769 MARINE & CAR ENGINE SPECIALS P-21Car SE $6500 P21 Marine SE$6500 P65 Marine $9000 P21 Car RE $6500 P-21 Marine RE $6500 P80 Marine $11000 P21 Buggy SE $6500 P-45 Mar-Drum RV $7800 P-21Delta$7500 P-45 Mar-Disc RV $8500 P90 Marine $13000 AERO ENGINE SPECIALS P-21 SE$5000P-45 SE$6000P-SO SE$9000 P21 RE$5500P60 SE$8500P80 RE$9500 P40 v $6500 P-60 RE $9000 P80 Duct Fan $10000 P-40 SE $5800 P-45 luct Fan $7500 P-65 Duct Fan $9500 Packing & Handling $400 COD Cash Only $165 Pay UPS Charge through ribs wing tip guides little extra care thought during building models control system will produce smooth-working wellbalanced system Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 65 Line spacing will defined ver tical distance Up line Down line handle neutral Specific examples addressed will handles spacing two four five inches will assume handles designed such manner regardless grip angle neutral Down line will attach handle directly below Up line addition horizontal line wrist hinge-point through vertical center handle will considered plane above forces will algebraically positive below will negative Dont let last bit throw simply basis some very simple math well doing discussion handle feel will become clear discuss overhang probably next month However Id better least mention what overhang everyone will PICCO GLO PLUGS $1500 Dozen aware what Im talking about Over hang distance wrist hingepoint outermost point con trol handle leadout wires emerge confinement han dle structure have assumed dis tance wrist hinge-point front handle grip 3 inches various tables calculations will used both March columns values deflection angles forces etc will dervied measurements reasonably-accurate full-scale drawings rather being derived mathematically force meas urements will assume total line tension pull 30 lb divided equally between Up Down hues ie 15 lb per line concept may very enlightening some havent taken opportunity completely think-through control sys tem entire Stunt package true friction-free control system will result load control lines being shared equally between lines throughout control deflectionsbut holds true up point maximum control deflection reached hang airplane single line condition sure sign poorly-trimmed plane radius rotation handle de flection control inputs will measured wrist hinge-point line-attach points described discussion overhang Thus greater line spacing overhang greater radius rotation sake keeping discussion reasonable length handle positions rotationsof 0 150 300 450 will used No consideration will taken pilots ability use arm body inputs modify handles mechanically-achiev able capabilities Well assume inputs would apply equally handle can therefore reasonably ignored Finally although function handle deflect flaps eleva tors would require full study airborne control system well han dle encompass findings thereof such study beyond scope ar ticle Therefore will accept func tion handle moving leadouts wing tip Therefore lin ear measurement movement will re flect effects inputs handle set Lets discuss response rate rela tive sensitivity first Take look Figure its accom panying table figure locates posi tion Up Down lines four dif ferent rotation angles 00 150 300 450 three different line spacings two four five inches solid sym bols indicate Down line position open symbols Up llne plot Up elevator assumed Down ele vator would produce identical plots reverse figure line-attach-point differential between Up Down lines plotted measured results posted Table numbers reflect control line dis placement neutral handle therefore wing tip larger number greater line displacement resulting control deflection given airplane Clearly wider line spacing greater line displacement given angle rotation thus sensitive handle No surprises us item remember max imum line displacement available handle equal line spacing No matter what hand Model Aviation EARLY EVERY DETAIL PERFORMS ALLvs o 101 IN WINGSPAI IG 50 LETE KIT LESS WHEELS EHOINEW PROPS 22000 SHIP 1935 KINNER SPORTWING size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 67th Ct Tulsa OK 74133 918 250-0033 9126 E 152 PHCISIUN HAIANC m ALL UIHLI HUNS Heres eqoipmenl need give props very best balance--balance directions Carefully crafted lop grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order lalers invited $1795 AM$lSOfor HOWARD B HUEBL SEPT 005 peovep handlIng Ii Mina 6% salon Ian No CODa Oon 02 Rn 0 MankoOn MN 56001
Edition: Model Aviation - 1985/02
Page Numbers: 64, 150, 152
Contml Line Scale Bill Boss BACK TO BASICS three-line con trol system appears time time have go back square talk about some very basic things Control Line flying us have building flying CL models years sometimes forget beginners might doing something first time Such case James Griffin Philadelphia PA just getting Scale modeling use threeline control system James problem related fact could get three-line system operate through full range control leaving slack lines positioned high- low-speed ex tremes After reading letter think ing about what written appeared problem having three lines equal length models control lead third line did have proper length create balanced system Now have set stage let go back start basics three-line system try point out some problem areas can encountered accompanying siketch shows typical three-line system used Control Line fliers years system composed con trol handle three lines models control unit control handle has built-in cam action allows movement elevator power-control leads opposite directions finger trigger operating lever top handle moved through its operating range control lines can stranded solid type appropriate thickness size weight model ac LEADOUTS LOW SPEEt HIGH SPEE HANDLE 3LINE CONTROL wellbuilt properly operating 3llne control system essential fog satisfactory performance Scale models Haying problems may caused failure follow basic construction guidelines using mismatched components Bill has quite few good tips type control system months column cordane Academy Model Aero nautics AMA safety rules regula tions models control unit comple ments control handle moves accordance amount travel handles third center line control handles units sup plied present time two manu facturers LR-Products Ltd formerly G-S Products 7787 Archdale Ave Detroit MI 48228 Sturdi-Built Continued page 150 64Model Aviation s B26 Invaders work Jake Chichilitti San Mateo CA notl built Comet stickand-tissue kits powered Cox Golden Bee 049s Covering sheet balsa plywood used beef up gear engine mountings Control via cutdown J Roberts 3llne system Waco b Bob Newman British Columbia CanadaL Ryan STA R Dave Mullens Seattle WA seen Eugene OR egionals entered Precision Scale event Waco based Dave Platt kit Both models powered 6Osize engines Ryan STA engine overheating problems discussed July 1983 column problem has overcome Dave has great success during 1984 Photos Bob Parker MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/z inches tall large 10 oz capacity its real attention getter definite collectors piece years come OAIyPlus $200 postage handling per order $695 60 CA residents add sales tax MOD-LER AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 02B4-40x5/8l2Pk$ 90 No 0384-40 x 3/412 Pk$100 No 07B6-32 x 3/412 Pk$110 No 0886-32 x 112 Pk$120 No 1188-32 x 1-1/212 Pk$155 BLIND NUTS ANDLOCK NUTS No 1284-40 Blind12 Pk$ 95 No 1486-32 Blind12 Pk$1 10 No 15B8-32 Blind12 Pk$1 25 No 1684-40 Lock12 Pk$ 45 No 1886-32 Lock12 Pk$ 50 No 1988-32 Lock12 Pk$ 55 $ 80 $90 $110 $135 $2 10 $2 50 $298 NYLON WINO BOLTS No2088-32 x 112Pk No2188-32 x 1-1/212Pk No23810-32 1-1/412Pk No24810-32 x 1-1/212Pk No2681/4-20 1-1/212Pk No2881/4-20x 212Pk No3081/4-20 x 312Pk PROPSToPPER 45ASturdy flexible vinyl plastic finger guard Protects against cuts andbruises starting engine Package contains 1 small 1 medium 1 large$1 50 SILICONE FUEL TUBING 60A3/32 Small Medium 3 Ft$1 75 61A1 8 Medium Large 3 Ft$1 89 MODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 $1200 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax Os cash add $125 Z7 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inQuiries welcome REPLACEMENT PARTS FOR Kr ft Engines T.torI McCoy Talpan 40 MJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available decades ago Lindley proposes Stout Trophy previously awarded Cabin awarded Manhattan Cabin good idea properly part rule book Indoor Rubber-Powered Ornithopter Two proposals have proposed identical proposed Free Flight Ornithopter event endeth discussion rules proposals Bob Meuser 4200 Gregory St Oakland CA 94619 CL Scale/Boss Continued page 64 4203 S Cloverdale Rd Boise ID 83705 provides J Roberts Flight Con trol system Both systems work equally well long put together cor rectly using matched parts supplied manufacturer Both systems work exactly same principle move control lever handle models control unit moved equal amount thus providing means con trol throttle drop bombs operate retracting landing gear system what ever As stated before putting com ponents together correctly key successfully-operating system must observe some basic instruc tions making-up either system three lines between handle model must equal length models control third-line leadout must 2Y longer elevator leadouts Please note 2% meas urement must made elevator leadouts pulled tight would systems high-speed position held other refer sketch system built just stated should have perfectly balanced system maintains equal tension three lines operated through entire control range preceding explanation based premise control handle model unit same manufac turer make distinction because IS pry rroeenJor 2 THERMD MOLDEDSTRONG. OT y METAL FRAMEGREAT GIFT X 2FILLED9s12x52 Sd SOS .f 1 Transmitter ection Case PRICE $35 inclode 5hppn5 & Hcnding n us CA es odd 6 Send check o no e V ERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 X principle operation two systems same basic dif ference between difference amount travel control lead third line J Roberts Flight System has travel approximately 1 LR-Products units have travel ap proximately 1% difference / between two systems mix sys tem components must take con sideration difference travel possibility improper operation system use J Roberts handle LR control unit will able obtain maximum travel available LR unit case would have sure plan operational func tions accordingly reverse situa tion use LR handle Sturdi Built control unit control lead has travel models control unit situation could result slack eleva tor lines handle forced its max imum travel case could flying putting full weight model control third line caus ing unsafe condition As can see care must taken selecting compo nents system mix different makes components aware pit falls make appropriate adjustments few additional notes models control units made two forms upright suspended providing choice mounting often used two types upright unit installation profile full-bodied models including Sport Scale models cockpit detail little importance However youre building Precision Scale model concerned about hiding control unit full cockpit floor maximum detail can installed mounting unit lower half wings thickness could answer addition knowing control system operates care must taken during systems installation make sure components work smoothly no binding especially leadouts pass Continued page 152 150Model Aviation RJL Industries ox 5654 dena CA 91107 Phone 1818J 359-0016 COITIOLIII TillS PROFILE0COMBA 7RA T WIDE & NARROW WEDGE UNIFLOW Capacities & SUNDD Cuutrn D1IDA huh Ingredients detailed hochureSOC stamps/check oni CAROLINA-TAFFINDER 8346 Delhi Road Charleston Hgts SC 29410 803553-769 MARINE & CAR ENGINE SPECIALS P-21Car SE $6500 P21 Marine SE$6500 P65 Marine $9000 P21 Car RE $6500 P-21 Marine RE $6500 P80 Marine $11000 P21 Buggy SE $6500 P-45 Mar-Drum RV $7800 P-21Delta$7500 P-45 Mar-Disc RV $8500 P90 Marine $13000 AERO ENGINE SPECIALS P-21 SE$5000P-45 SE$6000P-SO SE$9000 P21 RE$5500P60 SE$8500P80 RE$9500 P40 v $6500 P-60 RE $9000 P80 Duct Fan $10000 P-40 SE $5800 P-45 luct Fan $7500 P-65 Duct Fan $9500 Packing & Handling $400 COD Cash Only $165 Pay UPS Charge through ribs wing tip guides little extra care thought during building models control system will produce smooth-working wellbalanced system Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 65 Line spacing will defined ver tical distance Up line Down line handle neutral Specific examples addressed will handles spacing two four five inches will assume handles designed such manner regardless grip angle neutral Down line will attach handle directly below Up line addition horizontal line wrist hinge-point through vertical center handle will considered plane above forces will algebraically positive below will negative Dont let last bit throw simply basis some very simple math well doing discussion handle feel will become clear discuss overhang probably next month However Id better least mention what overhang everyone will PICCO GLO PLUGS $1500 Dozen aware what Im talking about Over hang distance wrist hingepoint outermost point con trol handle leadout wires emerge confinement han dle structure have assumed dis tance wrist hinge-point front handle grip 3 inches various tables calculations will used both March columns values deflection angles forces etc will dervied measurements reasonably-accurate full-scale drawings rather being derived mathematically force meas urements will assume total line tension pull 30 lb divided equally between Up Down hues ie 15 lb per line concept may very enlightening some havent taken opportunity completely think-through control sys tem entire Stunt package true friction-free control system will result load control lines being shared equally between lines throughout control deflectionsbut holds true up point maximum control deflection reached hang airplane single line condition sure sign poorly-trimmed plane radius rotation handle de flection control inputs will measured wrist hinge-point line-attach points described discussion overhang Thus greater line spacing overhang greater radius rotation sake keeping discussion reasonable length handle positions rotationsof 0 150 300 450 will used No consideration will taken pilots ability use arm body inputs modify handles mechanically-achiev able capabilities Well assume inputs would apply equally handle can therefore reasonably ignored Finally although function handle deflect flaps eleva tors would require full study airborne control system well han dle encompass findings thereof such study beyond scope ar ticle Therefore will accept func tion handle moving leadouts wing tip Therefore lin ear measurement movement will re flect effects inputs handle set Lets discuss response rate rela tive sensitivity first Take look Figure its accom panying table figure locates posi tion Up Down lines four dif ferent rotation angles 00 150 300 450 three different line spacings two four five inches solid sym bols indicate Down line position open symbols Up llne plot Up elevator assumed Down ele vator would produce identical plots reverse figure line-attach-point differential between Up Down lines plotted measured results posted Table numbers reflect control line dis placement neutral handle therefore wing tip larger number greater line displacement resulting control deflection given airplane Clearly wider line spacing greater line displacement given angle rotation thus sensitive handle No surprises us item remember max imum line displacement available handle equal line spacing No matter what hand Model Aviation EARLY EVERY DETAIL PERFORMS ALLvs o 101 IN WINGSPAI IG 50 LETE KIT LESS WHEELS EHOINEW PROPS 22000 SHIP 1935 KINNER SPORTWING size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 67th Ct Tulsa OK 74133 918 250-0033 9126 E 152 PHCISIUN HAIANC m ALL UIHLI HUNS Heres eqoipmenl need give props very best balance--balance directions Carefully crafted lop grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order lalers invited $1795 AM$lSOfor HOWARD B HUEBL SEPT 005 peovep handlIng Ii Mina 6% salon Ian No CODa Oon 02 Rn 0 MankoOn MN 56001
Edition: Model Aviation - 1985/02
Page Numbers: 64, 150, 152
Contml Line Scale Bill Boss BACK TO BASICS three-line con trol system appears time time have go back square talk about some very basic things Control Line flying us have building flying CL models years sometimes forget beginners might doing something first time Such case James Griffin Philadelphia PA just getting Scale modeling use threeline control system James problem related fact could get three-line system operate through full range control leaving slack lines positioned high- low-speed ex tremes After reading letter think ing about what written appeared problem having three lines equal length models control lead third line did have proper length create balanced system Now have set stage let go back start basics three-line system try point out some problem areas can encountered accompanying siketch shows typical three-line system used Control Line fliers years system composed con trol handle three lines models control unit control handle has built-in cam action allows movement elevator power-control leads opposite directions finger trigger operating lever top handle moved through its operating range control lines can stranded solid type appropriate thickness size weight model ac LEADOUTS LOW SPEEt HIGH SPEE HANDLE 3LINE CONTROL wellbuilt properly operating 3llne control system essential fog satisfactory performance Scale models Haying problems may caused failure follow basic construction guidelines using mismatched components Bill has quite few good tips type control system months column cordane Academy Model Aero nautics AMA safety rules regula tions models control unit comple ments control handle moves accordance amount travel handles third center line control handles units sup plied present time two manu facturers LR-Products Ltd formerly G-S Products 7787 Archdale Ave Detroit MI 48228 Sturdi-Built Continued page 150 64Model Aviation s B26 Invaders work Jake Chichilitti San Mateo CA notl built Comet stickand-tissue kits powered Cox Golden Bee 049s Covering sheet balsa plywood used beef up gear engine mountings Control via cutdown J Roberts 3llne system Waco b Bob Newman British Columbia CanadaL Ryan STA R Dave Mullens Seattle WA seen Eugene OR egionals entered Precision Scale event Waco based Dave Platt kit Both models powered 6Osize engines Ryan STA engine overheating problems discussed July 1983 column problem has overcome Dave has great success during 1984 Photos Bob Parker MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/z inches tall large 10 oz capacity its real attention getter definite collectors piece years come OAIyPlus $200 postage handling per order $695 60 CA residents add sales tax MOD-LER AFFORDABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No 02B4-40x5/8l2Pk$ 90 No 0384-40 x 3/412 Pk$100 No 07B6-32 x 3/412 Pk$110 No 0886-32 x 112 Pk$120 No 1188-32 x 1-1/212 Pk$155 BLIND NUTS ANDLOCK NUTS No 1284-40 Blind12 Pk$ 95 No 1486-32 Blind12 Pk$1 10 No 15B8-32 Blind12 Pk$1 25 No 1684-40 Lock12 Pk$ 45 No 1886-32 Lock12 Pk$ 50 No 1988-32 Lock12 Pk$ 55 $ 80 $90 $110 $135 $2 10 $2 50 $298 NYLON WINO BOLTS No2088-32 x 112Pk No2188-32 x 1-1/212Pk No23810-32 1-1/412Pk No24810-32 x 1-1/212Pk No2681/4-20 1-1/212Pk No2881/4-20x 212Pk No3081/4-20 x 312Pk PROPSToPPER 45ASturdy flexible vinyl plastic finger guard Protects against cuts andbruises starting engine Package contains 1 small 1 medium 1 large$1 50 SILICONE FUEL TUBING 60A3/32 Small Medium 3 Ft$1 75 61A1 8 Medium Large 3 Ft$1 89 MODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 $1200 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax Os cash add $125 Z7 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inQuiries welcome REPLACEMENT PARTS FOR Kr ft Engines T.torI McCoy Talpan 40 MJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available decades ago Lindley proposes Stout Trophy previously awarded Cabin awarded Manhattan Cabin good idea properly part rule book Indoor Rubber-Powered Ornithopter Two proposals have proposed identical proposed Free Flight Ornithopter event endeth discussion rules proposals Bob Meuser 4200 Gregory St Oakland CA 94619 CL Scale/Boss Continued page 64 4203 S Cloverdale Rd Boise ID 83705 provides J Roberts Flight Con trol system Both systems work equally well long put together cor rectly using matched parts supplied manufacturer Both systems work exactly same principle move control lever handle models control unit moved equal amount thus providing means con trol throttle drop bombs operate retracting landing gear system what ever As stated before putting com ponents together correctly key successfully-operating system must observe some basic instruc tions making-up either system three lines between handle model must equal length models control third-line leadout must 2Y longer elevator leadouts Please note 2% meas urement must made elevator leadouts pulled tight would systems high-speed position held other refer sketch system built just stated should have perfectly balanced system maintains equal tension three lines operated through entire control range preceding explanation based premise control handle model unit same manufac turer make distinction because IS pry rroeenJor 2 THERMD MOLDEDSTRONG. OT y METAL FRAMEGREAT GIFT X 2FILLED9s12x52 Sd SOS .f 1 Transmitter ection Case PRICE $35 inclode 5hppn5 & Hcnding n us CA es odd 6 Send check o no e V ERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 X principle operation two systems same basic dif ference between difference amount travel control lead third line J Roberts Flight System has travel approximately 1 LR-Products units have travel ap proximately 1% difference / between two systems mix sys tem components must take con sideration difference travel possibility improper operation system use J Roberts handle LR control unit will able obtain maximum travel available LR unit case would have sure plan operational func tions accordingly reverse situa tion use LR handle Sturdi Built control unit control lead has travel models control unit situation could result slack eleva tor lines handle forced its max imum travel case could flying putting full weight model control third line caus ing unsafe condition As can see care must taken selecting compo nents system mix different makes components aware pit falls make appropriate adjustments few additional notes models control units made two forms upright suspended providing choice mounting often used two types upright unit installation profile full-bodied models including Sport Scale models cockpit detail little importance However youre building Precision Scale model concerned about hiding control unit full cockpit floor maximum detail can installed mounting unit lower half wings thickness could answer addition knowing control system operates care must taken during systems installation make sure components work smoothly no binding especially leadouts pass Continued page 152 150Model Aviation RJL Industries ox 5654 dena CA 91107 Phone 1818J 359-0016 COITIOLIII TillS PROFILE0COMBA 7RA T WIDE & NARROW WEDGE UNIFLOW Capacities & SUNDD Cuutrn D1IDA huh Ingredients detailed hochureSOC stamps/check oni CAROLINA-TAFFINDER 8346 Delhi Road Charleston Hgts SC 29410 803553-769 MARINE & CAR ENGINE SPECIALS P-21Car SE $6500 P21 Marine SE$6500 P65 Marine $9000 P21 Car RE $6500 P-21 Marine RE $6500 P80 Marine $11000 P21 Buggy SE $6500 P-45 Mar-Drum RV $7800 P-21Delta$7500 P-45 Mar-Disc RV $8500 P90 Marine $13000 AERO ENGINE SPECIALS P-21 SE$5000P-45 SE$6000P-SO SE$9000 P21 RE$5500P60 SE$8500P80 RE$9500 P40 v $6500 P-60 RE $9000 P80 Duct Fan $10000 P-40 SE $5800 P-45 luct Fan $7500 P-65 Duct Fan $9500 Packing & Handling $400 COD Cash Only $165 Pay UPS Charge through ribs wing tip guides little extra care thought during building models control system will produce smooth-working wellbalanced system Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 65 Line spacing will defined ver tical distance Up line Down line handle neutral Specific examples addressed will handles spacing two four five inches will assume handles designed such manner regardless grip angle neutral Down line will attach handle directly below Up line addition horizontal line wrist hinge-point through vertical center handle will considered plane above forces will algebraically positive below will negative Dont let last bit throw simply basis some very simple math well doing discussion handle feel will become clear discuss overhang probably next month However Id better least mention what overhang everyone will PICCO GLO PLUGS $1500 Dozen aware what Im talking about Over hang distance wrist hingepoint outermost point con trol handle leadout wires emerge confinement han dle structure have assumed dis tance wrist hinge-point front handle grip 3 inches various tables calculations will used both March columns values deflection angles forces etc will dervied measurements reasonably-accurate full-scale drawings rather being derived mathematically force meas urements will assume total line tension pull 30 lb divided equally between Up Down hues ie 15 lb per line concept may very enlightening some havent taken opportunity completely think-through control sys tem entire Stunt package true friction-free control system will result load control lines being shared equally between lines throughout control deflectionsbut holds true up point maximum control deflection reached hang airplane single line condition sure sign poorly-trimmed plane radius rotation handle de flection control inputs will measured wrist hinge-point line-attach points described discussion overhang Thus greater line spacing overhang greater radius rotation sake keeping discussion reasonable length handle positions rotationsof 0 150 300 450 will used No consideration will taken pilots ability use arm body inputs modify handles mechanically-achiev able capabilities Well assume inputs would apply equally handle can therefore reasonably ignored Finally although function handle deflect flaps eleva tors would require full study airborne control system well han dle encompass findings thereof such study beyond scope ar ticle Therefore will accept func tion handle moving leadouts wing tip Therefore lin ear measurement movement will re flect effects inputs handle set Lets discuss response rate rela tive sensitivity first Take look Figure its accom panying table figure locates posi tion Up Down lines four dif ferent rotation angles 00 150 300 450 three different line spacings two four five inches solid sym bols indicate Down line position open symbols Up llne plot Up elevator assumed Down ele vator would produce identical plots reverse figure line-attach-point differential between Up Down lines plotted measured results posted Table numbers reflect control line dis placement neutral handle therefore wing tip larger number greater line displacement resulting control deflection given airplane Clearly wider line spacing greater line displacement given angle rotation thus sensitive handle No surprises us item remember max imum line displacement available handle equal line spacing No matter what hand Model Aviation EARLY EVERY DETAIL PERFORMS ALLvs o 101 IN WINGSPAI IG 50 LETE KIT LESS WHEELS EHOINEW PROPS 22000 SHIP 1935 KINNER SPORTWING size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 67th Ct Tulsa OK 74133 918 250-0033 9126 E 152 PHCISIUN HAIANC m ALL UIHLI HUNS Heres eqoipmenl need give props very best balance--balance directions Carefully crafted lop grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order lalers invited $1795 AM$lSOfor HOWARD B HUEBL SEPT 005 peovep handlIng Ii Mina 6% salon Ian No CODa Oon 02 Rn 0 MankoOn MN 56001