Contml Line Scale Bill Boss CONTROL SYSTEM Feburary 1985 column covered general opera tion three-line control system some possible difficulties might encountered line lengths accurate different manufacturers parts mixed matched time did talk detail about basic installation planes control unitand need exists job well done area models con struction What brought subject mind extra amount time effort spent recently installing con trol system latest Scale project P-Si Mustang also wondered readers might newcomers Scale operating feature forward part wing front main spar kept clear receive models 3Y2-in wheels addition receiving wheels room allowed wheel well cover-door operating mechan ism other wheel well details Because Continued page 152 basic steps Bill used installing 3-line control system newest project P51 Mustang discusses reasons some design features column Details shown Clockwise starting Upper Left Basic belicrank platform lay out lead-out termination mounting platform interlocking part models specially-made center rib plus clear ance slots smooth belicrank operation total belicrank installation including use intermediate belicrank throttle iinkage get throttle pushrod up over forward part wing gear-retraction servo will operated via elec tronic digital system built some help folks Ace R/C Inc Future columns will deal might benefit few words subject realize what follows applies particular model princi ples can applied model choosing time set Out build new model whether kit scratch have make some basic decisions want motor control flap operation retracting gear finished cockpit features plan employ could play important part main bellcrank gets mounted model case P-Si decided wanted flap operation retracting gear operation several other items such oil cooler door cockpit canopy wing tank bomb drops order accomplish installation features some advance planning re quired basic posi tion installation main bellcrank Because gear retraction chosen July1985 65 yan eing oun Dy Al uIcKeI outn uena IN OT Iflose Scale projects requiring much time effort look good perform well essential element models control system well-designed work smoothly Bill concentrates column STA spans 72 uses K&B 61 power throttle controi Bickel photo x FOX FOX GLOWs-WAY PLUGWRENCH Standard $119 R/C $169 Sales Fox Glow Plug have now passed 10 million mark good reason too its machined idle bar cant break loose Its platinum-rhodium element worlds finest Its space age insulator never burns out tested before packaging Fox Wrench specially designed install Glow Plug properly Chances cross threading reduced 3/8 7/16 1/2 hex fit prop nuts too Bright chrome finish better model shops everywhere Fox MFG Co 5305 TOWSON AVE FORT SMITH AR 72901 15011 6461656 Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY N 109 1 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR KUHN 109 Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair additional moan woight steel hub available PROP HUB ASSEUBLY N 108 285 grams $1500 PROP HUh ASSEMBLY # 110 049 051 engines electric motor equivalent Weights grams $1500 PlOP BLADES FOR HUB N 110 Available 6x 3 $400 per blade $800 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line DEALER INIIUIRIES INVITED 152 Model Aviation CL Aerobatics/Fancher Continued page 149 lem Use about 8% 12% design midpoint leadouts should approximately 30 sweep designed CU aircraft centerline allowance made A-in adjustment fore aft bellcrank location item No 9 table should right CU leadouts will exit wing tip straight line forced bend remember CU will lime up leadout exit midpoint Finally use moderate-to-blunt leading edge important sharp So much stability Now lets go second trim objective table make blamed thing turn Once again CU must take star bill ing along its relationship C/L wing item No 1 next section table tail volume effectiveness table items Nos 2 3 flap/elevator ratio item No 4 aircraft weight U loads lift required item No 5 aspect ratio item No 6 Since bound together lets discuss group might just well start out controversial stuff can draw bat tle lines early rate Stunter turns pitches primarily function lift light weight reasonable weight adequate lift desirable light wing loading primary requisite rapid pitch change. especially predictable controllable change Lets take quick look Stunt ship level flight lift exactly equals weight threepound airplane developing three pounds lift now desire pitch three-pound ship abruptly square corner will cause acceleration change direction aircrafts mass will result apparent weight increasing resultant weight termed G load U normal weight five Us five times normal weight etc Just fun heres formula figuring U forces G 0668V2R V speed mph R radius corner feet example three-pound Stunt er turns corner 10-foot radius flying 55 mph would incur U forces 20 times its own weight 60 pounds lift wing must produce support Stunter throughout cor ner Please note wing can produce lift required However unable produce amount lift must increase radius cor ner else aircraft will stall wing forced past its critical stalling angle attack As discussed April wing develops lift concentrated Center Lift normally aft CU Therefore lift causes pitch ing moment direction opposite desired pitch change force must overcome tail before change body angle can made Since lift necessary support U forces corner can reduce pitching moment lessening distance between CU C/L design phase can done increasing aspect ratio wing allows us narrow distance between CU C/L still retaining desired percentage location CU about 16% MAC Another significant factor about highaspect-ratio wings given amount lift will develop less duced drag drag results production lift primarily wingtip vor tices downwash reduces thrust requirements corner good will slow airplane less also good As tail remember high aspect ratios increase lift coeffi cient given angle attack therefore real-world limit maximum aspect ratio can control smoothly abrupt maneuvers Remember flaps high-lift devices contribute significant percentage increased lift generated corner Well get back Ted Fancher 158 Flying Cloud Isle Foster City CA 94409 CL Scale/Boss Continued page 65 landing gear requirements decided use single specially-made center wing rib base wheel well cover doors main bellcrank mounting As usual practice building plans meant RC use case plans Bryan Taylor Ureat Britain obtained Bob Holman Plans San Bernardino CA wings main spar ribsfrom center point landing gear will mountedare made 1-in plywood done make solid base possible build rest model See August 1982 MA column general information converting RC kits CL use case addition making ribs plywood wings center rib constructed lami nating two -in plywood -in balsa rib specially slotted accept main bellcrank platform accompanying photos show three basic steps design installation control system will provide eleva tor engine control still allow wheel well area kept clear pushrods etc first photos shows bellcrank leadouts well-laidout platform Care should exercised cutting platforms slot see ample clearance provided bellcranks sliding mechanism certain OTS TS RIOR TS T. THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295Plus 1/12 Scale895$250shipping 1/12Chopper 895each figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 no binding takes place throughout operating range belicrank leadouts shown purposely two attached bellcrank method making leadout terminations have used successfully years could shown As can see offset put solid piano wire carefully bent form loop has inside radius about A6 leadout threaded onto belicrank offset facing up small piece copper brass tubing moved place properly soldered soldering tubing place sure wire clean solder applied end tubing flows through other end wire used 046-in diameter chosen two basic reasons First largest size bellcrank holes would accept drilling Secondly size fits rule own generally follow mak ing up models control systems leadout size should about twice size lines required fly model competition practice provides large margin safety pull-testing control system wear second photo shows platform epoxied place bellcrank mount ed after leadouts threaded through holes wing ribs Note notched portion bellcrank platform fits around slotted center rib no way pull-test models flying stresses can pull platform loose Also note A-in balsa strips epox ied against main spar both top bot tom platform additional support now leads us last photo see motor elevator con trol rods/cables place As stated early part column desirable keep wheel well area free thing connected landing gear operation Therefore necessary install intermediate belicrank about 450 angle shown motor control cable could run along wings upper skin surface As can also see elevator pushrod run under angled bracket holds motor con trol bellcrank note caution making up systems composed several components essential its operation abso lutely smooth free binding test system smooth operation simply push pull third control line binding discovered make effort discover make appropriate adjustments elim inate design control system strength ease operation should trouble-free life model time probably wonder ing what servo doing picture Control Line bellcrank system Well have joined ranks using Encoder-Decoder systems con trolling flaps landing gear retraction bomb drop etc CL planes system am using put together some help folks Ace R/C Inc will talking about future columns Send ideas photos building tos etc CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Combat/Johnson Continued page 66 power old-style K&B 40 design equal Fox except having 40 displacement will make proportionally greater power 36 Now incredible speeds being obtained some top tuners using 36 engines would wonder anyone would want go faster argument can think us could go faster easily Whats difference between 120 mph 130 mph youre having fun may engine-availability problem future some desirable engines still lot 36s left Another alternative increase displacement would decrease 35cc 21 cu size 36 could compete against 40 P0 Box 279CU Park Falls WI 54552 U Proudly Presents 0 CHAMPION FF KITS Wake-Up Wakefield $4295 Champion Coupe $2450 Upshot Mulvihill. $2295 CHAMPION RUBBER 1/8 3/16 & 1/4 widths 042 thick $1150/lb Box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 Carmen Ct La Verne CA 91750 714 599-3348 * incluxe US deli ry via UPS Calif residents ada 6% sees tax DUAL PERSONAUTY TRAINER GEMINIS BEAUTIFUL SUPER CHAMP W S 54 20 35 ENGINES 3 CHANNEL THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing ellmliiates bolts rubber bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Bee 1168 Passere NJ 07055 July1985 153 Ill ALE RhITROL MODEL 62 SP.. F... 45 CHANNEL RIC First Series Iof Great Flying Canards RIC Modeler I
Edition: Model Aviation - 1985/07
Page Numbers: 65, 152, 153
Contml Line Scale Bill Boss CONTROL SYSTEM Feburary 1985 column covered general opera tion three-line control system some possible difficulties might encountered line lengths accurate different manufacturers parts mixed matched time did talk detail about basic installation planes control unitand need exists job well done area models con struction What brought subject mind extra amount time effort spent recently installing con trol system latest Scale project P-Si Mustang also wondered readers might newcomers Scale operating feature forward part wing front main spar kept clear receive models 3Y2-in wheels addition receiving wheels room allowed wheel well cover-door operating mechan ism other wheel well details Because Continued page 152 basic steps Bill used installing 3-line control system newest project P51 Mustang discusses reasons some design features column Details shown Clockwise starting Upper Left Basic belicrank platform lay out lead-out termination mounting platform interlocking part models specially-made center rib plus clear ance slots smooth belicrank operation total belicrank installation including use intermediate belicrank throttle iinkage get throttle pushrod up over forward part wing gear-retraction servo will operated via elec tronic digital system built some help folks Ace R/C Inc Future columns will deal might benefit few words subject realize what follows applies particular model princi ples can applied model choosing time set Out build new model whether kit scratch have make some basic decisions want motor control flap operation retracting gear finished cockpit features plan employ could play important part main bellcrank gets mounted model case P-Si decided wanted flap operation retracting gear operation several other items such oil cooler door cockpit canopy wing tank bomb drops order accomplish installation features some advance planning re quired basic posi tion installation main bellcrank Because gear retraction chosen July1985 65 yan eing oun Dy Al uIcKeI outn uena IN OT Iflose Scale projects requiring much time effort look good perform well essential element models control system well-designed work smoothly Bill concentrates column STA spans 72 uses K&B 61 power throttle controi Bickel photo x FOX FOX GLOWs-WAY PLUGWRENCH Standard $119 R/C $169 Sales Fox Glow Plug have now passed 10 million mark good reason too its machined idle bar cant break loose Its platinum-rhodium element worlds finest Its space age insulator never burns out tested before packaging Fox Wrench specially designed install Glow Plug properly Chances cross threading reduced 3/8 7/16 1/2 hex fit prop nuts too Bright chrome finish better model shops everywhere Fox MFG Co 5305 TOWSON AVE FORT SMITH AR 72901 15011 6461656 Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY N 109 1 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR KUHN 109 Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair additional moan woight steel hub available PROP HUB ASSEUBLY N 108 285 grams $1500 PROP HUh ASSEMBLY # 110 049 051 engines electric motor equivalent Weights grams $1500 PlOP BLADES FOR HUB N 110 Available 6x 3 $400 per blade $800 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line DEALER INIIUIRIES INVITED 152 Model Aviation CL Aerobatics/Fancher Continued page 149 lem Use about 8% 12% design midpoint leadouts should approximately 30 sweep designed CU aircraft centerline allowance made A-in adjustment fore aft bellcrank location item No 9 table should right CU leadouts will exit wing tip straight line forced bend remember CU will lime up leadout exit midpoint Finally use moderate-to-blunt leading edge important sharp So much stability Now lets go second trim objective table make blamed thing turn Once again CU must take star bill ing along its relationship C/L wing item No 1 next section table tail volume effectiveness table items Nos 2 3 flap/elevator ratio item No 4 aircraft weight U loads lift required item No 5 aspect ratio item No 6 Since bound together lets discuss group might just well start out controversial stuff can draw bat tle lines early rate Stunter turns pitches primarily function lift light weight reasonable weight adequate lift desirable light wing loading primary requisite rapid pitch change. especially predictable controllable change Lets take quick look Stunt ship level flight lift exactly equals weight threepound airplane developing three pounds lift now desire pitch three-pound ship abruptly square corner will cause acceleration change direction aircrafts mass will result apparent weight increasing resultant weight termed G load U normal weight five Us five times normal weight etc Just fun heres formula figuring U forces G 0668V2R V speed mph R radius corner feet example three-pound Stunt er turns corner 10-foot radius flying 55 mph would incur U forces 20 times its own weight 60 pounds lift wing must produce support Stunter throughout cor ner Please note wing can produce lift required However unable produce amount lift must increase radius cor ner else aircraft will stall wing forced past its critical stalling angle attack As discussed April wing develops lift concentrated Center Lift normally aft CU Therefore lift causes pitch ing moment direction opposite desired pitch change force must overcome tail before change body angle can made Since lift necessary support U forces corner can reduce pitching moment lessening distance between CU C/L design phase can done increasing aspect ratio wing allows us narrow distance between CU C/L still retaining desired percentage location CU about 16% MAC Another significant factor about highaspect-ratio wings given amount lift will develop less duced drag drag results production lift primarily wingtip vor tices downwash reduces thrust requirements corner good will slow airplane less also good As tail remember high aspect ratios increase lift coeffi cient given angle attack therefore real-world limit maximum aspect ratio can control smoothly abrupt maneuvers Remember flaps high-lift devices contribute significant percentage increased lift generated corner Well get back Ted Fancher 158 Flying Cloud Isle Foster City CA 94409 CL Scale/Boss Continued page 65 landing gear requirements decided use single specially-made center wing rib base wheel well cover doors main bellcrank mounting As usual practice building plans meant RC use case plans Bryan Taylor Ureat Britain obtained Bob Holman Plans San Bernardino CA wings main spar ribsfrom center point landing gear will mountedare made 1-in plywood done make solid base possible build rest model See August 1982 MA column general information converting RC kits CL use case addition making ribs plywood wings center rib constructed lami nating two -in plywood -in balsa rib specially slotted accept main bellcrank platform accompanying photos show three basic steps design installation control system will provide eleva tor engine control still allow wheel well area kept clear pushrods etc first photos shows bellcrank leadouts well-laidout platform Care should exercised cutting platforms slot see ample clearance provided bellcranks sliding mechanism certain OTS TS RIOR TS T. THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295Plus 1/12 Scale895$250shipping 1/12Chopper 895each figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 no binding takes place throughout operating range belicrank leadouts shown purposely two attached bellcrank method making leadout terminations have used successfully years could shown As can see offset put solid piano wire carefully bent form loop has inside radius about A6 leadout threaded onto belicrank offset facing up small piece copper brass tubing moved place properly soldered soldering tubing place sure wire clean solder applied end tubing flows through other end wire used 046-in diameter chosen two basic reasons First largest size bellcrank holes would accept drilling Secondly size fits rule own generally follow mak ing up models control systems leadout size should about twice size lines required fly model competition practice provides large margin safety pull-testing control system wear second photo shows platform epoxied place bellcrank mount ed after leadouts threaded through holes wing ribs Note notched portion bellcrank platform fits around slotted center rib no way pull-test models flying stresses can pull platform loose Also note A-in balsa strips epox ied against main spar both top bot tom platform additional support now leads us last photo see motor elevator con trol rods/cables place As stated early part column desirable keep wheel well area free thing connected landing gear operation Therefore necessary install intermediate belicrank about 450 angle shown motor control cable could run along wings upper skin surface As can also see elevator pushrod run under angled bracket holds motor con trol bellcrank note caution making up systems composed several components essential its operation abso lutely smooth free binding test system smooth operation simply push pull third control line binding discovered make effort discover make appropriate adjustments elim inate design control system strength ease operation should trouble-free life model time probably wonder ing what servo doing picture Control Line bellcrank system Well have joined ranks using Encoder-Decoder systems con trolling flaps landing gear retraction bomb drop etc CL planes system am using put together some help folks Ace R/C Inc will talking about future columns Send ideas photos building tos etc CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Combat/Johnson Continued page 66 power old-style K&B 40 design equal Fox except having 40 displacement will make proportionally greater power 36 Now incredible speeds being obtained some top tuners using 36 engines would wonder anyone would want go faster argument can think us could go faster easily Whats difference between 120 mph 130 mph youre having fun may engine-availability problem future some desirable engines still lot 36s left Another alternative increase displacement would decrease 35cc 21 cu size 36 could compete against 40 P0 Box 279CU Park Falls WI 54552 U Proudly Presents 0 CHAMPION FF KITS Wake-Up Wakefield $4295 Champion Coupe $2450 Upshot Mulvihill. $2295 CHAMPION RUBBER 1/8 3/16 & 1/4 widths 042 thick $1150/lb Box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 Carmen Ct La Verne CA 91750 714 599-3348 * incluxe US deli ry via UPS Calif residents ada 6% sees tax DUAL PERSONAUTY TRAINER GEMINIS BEAUTIFUL SUPER CHAMP W S 54 20 35 ENGINES 3 CHANNEL THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing ellmliiates bolts rubber bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Bee 1168 Passere NJ 07055 July1985 153 Ill ALE RhITROL MODEL 62 SP.. F... 45 CHANNEL RIC First Series Iof Great Flying Canards RIC Modeler I
Edition: Model Aviation - 1985/07
Page Numbers: 65, 152, 153
Contml Line Scale Bill Boss CONTROL SYSTEM Feburary 1985 column covered general opera tion three-line control system some possible difficulties might encountered line lengths accurate different manufacturers parts mixed matched time did talk detail about basic installation planes control unitand need exists job well done area models con struction What brought subject mind extra amount time effort spent recently installing con trol system latest Scale project P-Si Mustang also wondered readers might newcomers Scale operating feature forward part wing front main spar kept clear receive models 3Y2-in wheels addition receiving wheels room allowed wheel well cover-door operating mechan ism other wheel well details Because Continued page 152 basic steps Bill used installing 3-line control system newest project P51 Mustang discusses reasons some design features column Details shown Clockwise starting Upper Left Basic belicrank platform lay out lead-out termination mounting platform interlocking part models specially-made center rib plus clear ance slots smooth belicrank operation total belicrank installation including use intermediate belicrank throttle iinkage get throttle pushrod up over forward part wing gear-retraction servo will operated via elec tronic digital system built some help folks Ace R/C Inc Future columns will deal might benefit few words subject realize what follows applies particular model princi ples can applied model choosing time set Out build new model whether kit scratch have make some basic decisions want motor control flap operation retracting gear finished cockpit features plan employ could play important part main bellcrank gets mounted model case P-Si decided wanted flap operation retracting gear operation several other items such oil cooler door cockpit canopy wing tank bomb drops order accomplish installation features some advance planning re quired basic posi tion installation main bellcrank Because gear retraction chosen July1985 65 yan eing oun Dy Al uIcKeI outn uena IN OT Iflose Scale projects requiring much time effort look good perform well essential element models control system well-designed work smoothly Bill concentrates column STA spans 72 uses K&B 61 power throttle controi Bickel photo x FOX FOX GLOWs-WAY PLUGWRENCH Standard $119 R/C $169 Sales Fox Glow Plug have now passed 10 million mark good reason too its machined idle bar cant break loose Its platinum-rhodium element worlds finest Its space age insulator never burns out tested before packaging Fox Wrench specially designed install Glow Plug properly Chances cross threading reduced 3/8 7/16 1/2 hex fit prop nuts too Bright chrome finish better model shops everywhere Fox MFG Co 5305 TOWSON AVE FORT SMITH AR 72901 15011 6461656 Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY N 109 1 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR KUHN 109 Available Tx 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair additional moan woight steel hub available PROP HUB ASSEUBLY N 108 285 grams $1500 PROP HUh ASSEMBLY # 110 049 051 engines electric motor equivalent Weights grams $1500 PlOP BLADES FOR HUB N 110 Available 6x 3 $400 per blade $800 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line DEALER INIIUIRIES INVITED 152 Model Aviation CL Aerobatics/Fancher Continued page 149 lem Use about 8% 12% design midpoint leadouts should approximately 30 sweep designed CU aircraft centerline allowance made A-in adjustment fore aft bellcrank location item No 9 table should right CU leadouts will exit wing tip straight line forced bend remember CU will lime up leadout exit midpoint Finally use moderate-to-blunt leading edge important sharp So much stability Now lets go second trim objective table make blamed thing turn Once again CU must take star bill ing along its relationship C/L wing item No 1 next section table tail volume effectiveness table items Nos 2 3 flap/elevator ratio item No 4 aircraft weight U loads lift required item No 5 aspect ratio item No 6 Since bound together lets discuss group might just well start out controversial stuff can draw bat tle lines early rate Stunter turns pitches primarily function lift light weight reasonable weight adequate lift desirable light wing loading primary requisite rapid pitch change. especially predictable controllable change Lets take quick look Stunt ship level flight lift exactly equals weight threepound airplane developing three pounds lift now desire pitch three-pound ship abruptly square corner will cause acceleration change direction aircrafts mass will result apparent weight increasing resultant weight termed G load U normal weight five Us five times normal weight etc Just fun heres formula figuring U forces G 0668V2R V speed mph R radius corner feet example three-pound Stunt er turns corner 10-foot radius flying 55 mph would incur U forces 20 times its own weight 60 pounds lift wing must produce support Stunter throughout cor ner Please note wing can produce lift required However unable produce amount lift must increase radius cor ner else aircraft will stall wing forced past its critical stalling angle attack As discussed April wing develops lift concentrated Center Lift normally aft CU Therefore lift causes pitch ing moment direction opposite desired pitch change force must overcome tail before change body angle can made Since lift necessary support U forces corner can reduce pitching moment lessening distance between CU C/L design phase can done increasing aspect ratio wing allows us narrow distance between CU C/L still retaining desired percentage location CU about 16% MAC Another significant factor about highaspect-ratio wings given amount lift will develop less duced drag drag results production lift primarily wingtip vor tices downwash reduces thrust requirements corner good will slow airplane less also good As tail remember high aspect ratios increase lift coeffi cient given angle attack therefore real-world limit maximum aspect ratio can control smoothly abrupt maneuvers Remember flaps high-lift devices contribute significant percentage increased lift generated corner Well get back Ted Fancher 158 Flying Cloud Isle Foster City CA 94409 CL Scale/Boss Continued page 65 landing gear requirements decided use single specially-made center wing rib base wheel well cover doors main bellcrank mounting As usual practice building plans meant RC use case plans Bryan Taylor Ureat Britain obtained Bob Holman Plans San Bernardino CA wings main spar ribsfrom center point landing gear will mountedare made 1-in plywood done make solid base possible build rest model See August 1982 MA column general information converting RC kits CL use case addition making ribs plywood wings center rib constructed lami nating two -in plywood -in balsa rib specially slotted accept main bellcrank platform accompanying photos show three basic steps design installation control system will provide eleva tor engine control still allow wheel well area kept clear pushrods etc first photos shows bellcrank leadouts well-laidout platform Care should exercised cutting platforms slot see ample clearance provided bellcranks sliding mechanism certain OTS TS RIOR TS T. THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT FOR YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWIIMILITARY 1/3 Scale$19951/5 Navy$1395 1/4 Scale14951/6AAF1195 1/5 Scale1295Plus 1/12 Scale895$250shipping 1/12Chopper 895each figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 no binding takes place throughout operating range belicrank leadouts shown purposely two attached bellcrank method making leadout terminations have used successfully years could shown As can see offset put solid piano wire carefully bent form loop has inside radius about A6 leadout threaded onto belicrank offset facing up small piece copper brass tubing moved place properly soldered soldering tubing place sure wire clean solder applied end tubing flows through other end wire used 046-in diameter chosen two basic reasons First largest size bellcrank holes would accept drilling Secondly size fits rule own generally follow mak ing up models control systems leadout size should about twice size lines required fly model competition practice provides large margin safety pull-testing control system wear second photo shows platform epoxied place bellcrank mount ed after leadouts threaded through holes wing ribs Note notched portion bellcrank platform fits around slotted center rib no way pull-test models flying stresses can pull platform loose Also note A-in balsa strips epox ied against main spar both top bot tom platform additional support now leads us last photo see motor elevator con trol rods/cables place As stated early part column desirable keep wheel well area free thing connected landing gear operation Therefore necessary install intermediate belicrank about 450 angle shown motor control cable could run along wings upper skin surface As can also see elevator pushrod run under angled bracket holds motor con trol bellcrank note caution making up systems composed several components essential its operation abso lutely smooth free binding test system smooth operation simply push pull third control line binding discovered make effort discover make appropriate adjustments elim inate design control system strength ease operation should trouble-free life model time probably wonder ing what servo doing picture Control Line bellcrank system Well have joined ranks using Encoder-Decoder systems con trolling flaps landing gear retraction bomb drop etc CL planes system am using put together some help folks Ace R/C Inc will talking about future columns Send ideas photos building tos etc CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Combat/Johnson Continued page 66 power old-style K&B 40 design equal Fox except having 40 displacement will make proportionally greater power 36 Now incredible speeds being obtained some top tuners using 36 engines would wonder anyone would want go faster argument can think us could go faster easily Whats difference between 120 mph 130 mph youre having fun may engine-availability problem future some desirable engines still lot 36s left Another alternative increase displacement would decrease 35cc 21 cu size 36 could compete against 40 P0 Box 279CU Park Falls WI 54552 U Proudly Presents 0 CHAMPION FF KITS Wake-Up Wakefield $4295 Champion Coupe $2450 Upshot Mulvihill. $2295 CHAMPION RUBBER 1/8 3/16 & 1/4 widths 042 thick $1150/lb Box* CATALOG $100 CHAMPION MODEL PRODUCTS 880 Carmen Ct La Verne CA 91750 714 599-3348 * incluxe US deli ry via UPS Calif residents ada 6% sees tax DUAL PERSONAUTY TRAINER GEMINIS BEAUTIFUL SUPER CHAMP W S 54 20 35 ENGINES 3 CHANNEL THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing ellmliiates bolts rubber bands Complete kit $5495 dealer direct GEMINI MODELS INC PO Bee 1168 Passere NJ 07055 July1985 153 Ill ALE RhITROL MODEL 62 SP.. F... 45 CHANNEL RIC First Series Iof Great Flying Canards RIC Modeler I