Navy Carrier Li Richard L Perry STARTED OUT last column write about some features models different other CL models am hoping remove some mystery event havent yet tried same time will try present variety methods might help experienced modeler around problem area might stimulate new idea column will deal tail hooks flaps ailerons chose lump items together because usually connected another some way Tail Hook function tail hook stop model during landing func tion intended hook end must approximately horizontal hook extended end hook points up could slide over first line passes hook must also able catch line model taxiing its normal three-point attitude 60-degree angle hook bend 60-degree extension should ensure both conditions met Fig 1 prefer land ng over stern five-foot altitude applying full down elevator boon Hot Stuff sales recommended th author seldom have chance catch line hook extended ex tended portion hook still impor tant controlled crash landing intentional otherwise produces consid erable bouncing can end up model perched main gear tail hook gracefully holding tail air An extension greater 60 degrees will increase possibility misfor tune positive stop lower hook position advantage spring holds hook down must adjust ed model will settle its normal three-point attitude gently lowered main gear tail hook Too little tension tail hook spring can cause another problemthe hook can bounce skip over lines after hitting deck first time using rubberbands actuate flaps tail hooks possible adjust tension required method shown Fig 2 puts little down force hook flap retracted force increases extend Profile Carrier models hook can mounted through fuselage using hardwood insert plywood facings fuselage brass tube bearing good idea removable simple hook instal lation suited classes shown Fig 2 landing gear clip used secure hook bearing fuselage 3/32 diameter wire best tail hook Lighter 1/16 wire will work hook portion reinforced prevent straightening landing tail hook used operate flaps must latched up during highspeed flight also prevents catching uneven deck joint during take off easiest common method attach L-hook music wire pushrod run through wire loop hook full down elevator applied momentarily hook released Some prefer use throttle movement release hook speed reduced requires additional wire tail Flaps Flaps allow wing generate higher lift coefficient produce addi tional drag aids slowing model no harder build ele vator should avoided because imagined complexity provide performance advantage low speed par ticularly Class II models common method flap actua tion shown Fig 1 Putting flap horn top keeps connecting wire tension flaps down allows lighter wire 045 used lighter rod can flex during arresting hook engagement ease shock flaps hook snapped back hook used simply release flaps actually pull down flaps spared abuse during land ings Fig 2 simplest methods have used purpose As hook extended L-shaped hook extension rotated out under wire attached flaps flaps extended spring rubberband Ailerons use ailerons has become increasingly popular recent years advantage long wing stalled model will bank away center circle improving line tension particular advantage up wind side circle two dis advantages First because down aileron flap causes drag up aileron result tendency turn model circle An effectivevertical stabi lizer can counter effect Second wing stalls down-aileron side inboard wing will stall first until outboard wing stalls too model will tend bank toward center circle phenomenon can produce some rather spectacular gyrationsat end lines effect pronounded thinner wings sharper leading edges Profile Carrier models effect ailerons can achieved shortening flap span outboard wing Class II models outboard aileron must move up inboard aileron moves down Therefore separate aileron Continued page 98 FIG 3 May1977 31 o FIG 1 FIG 4 BOX 511E HIGGINSVILLE MISSOURI 64037 agreed again sponsor unofficial Half-A precision aerobatics event 1977 Nationals Junior Senior Open competition will take place using com plete AMA pattern minus appearance points probable date would Satur day August 13 before after Walker Cup Flyoffs Engines limited total 051 maximum no requirement builder model rule however same plane may flown pilot Back-up model may used per AMA rules Airplanes must have iden tifying numbers per AMA rulebook ex cept numbers permissa ble event has developed popular lighthearted unofficial contest last years entry 25 spectator enthusiasm high Its worth watching fun competing event information PAMPA preci sion aerobatics write Wynn Paul 1640 Maywick Dr Lex KY 40504 Race/Kilsdonk continued page 53 next strategy involves pit race flexibility depends fuel capacity Since Rat Race Slow Rat pit required 70-lap races two pits required 140-lap races must capable least 47 laps per tank set models up go about 65-70 laps per tank Goodyear pit required 80-lap race three pits required 160-lapper requires least 40 laps per tank usually have capacity 60-65 laps per tank ideal race would have No 3 team pit first followed No 2 No 1 same lap intervals avoids possibility line snagging usually doesnt work however due differences air speeds Depending differences air speed fastest model will usually pit first followed others proportion relative air speed pilot usually has predetermined signals pit man will signal Like 40 80 120 laps Goodyear 4595 laps Rat pilot can size up strategy during race observing other models discussing other pilots model set up similar have about 20-lap cushion pit can used advantage pit either before after others right pit man has signaled pit pilot has determined best time should initiate shut down tripping shutoff slow MORE wi/A 13orn dIpw same powerYELLOW ~eteeteduePltCYX e~JBddC e\Wet'Tao 354304 Blade63 6-4354 Pusher74 76 78 504 [v32][b-1-10-1-10]]5ZSeach84 86 88654 Z 5~435/4 97118 6364 10-4 106056 8-685411-4 11-611-81 9-6106 1 3 Blade Tractor 55-3 5-4 6-36-4 504 3 Blade Pusher 6-3504 NC 12-4 T2-5 12-6 150 ORISH BROS ST JOHN INDIANA 46373 model down should give several full-up full-down controls use models wing air brake takes lots practice Start slow keep decreasing distance slow model down gradually What try to initiate fuel shut-off about before pit area No 1 pit loca tion can use wind help out No 3 pit position doesnt work well windy days wind will tend accelerate model just before landing pit man must now catch model refuel restart engine release lot time lost can under five seconds dependably 1975 Nationals Goodyear models finals very close air speed Yet able finish ahead several faster models because total pit stop time includes shut-down landing addition pit stop takeoff back air speed An excellent total pit stop includes time lost pit stop should less 15 seconds Have someone time though get one-flip start youll surprised amount lost time Another thing concentrate consistency Remember have make excellent pit stops time just good model now airborne again team must again prepare next pit stop entire sequence including new strategy based changes race must repeated again Actual contest experience much better realistic practice field So feel youre ready go out enter some contests potential hazards unforeseen circumstances contest will probably never encounter However experience experience lots practice will make winner CL Navy Carrier/Perry continued page 31 required release can run through wing throttle arm com mon method use flap movement operate release outboard aileron Fig 3 illustrates method used quite few Carrier medelers A bellcrank can used horns mounted top flap aileron connecting rods will tension can smaller diameter Fig 4 aileron release shown Leon Ryktarsyk As flap falls allows tin-stock plate rotate thus releasing aileron deflected spring rubberband lightest simplest method aileron actuation 98 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return [AU II Em have run across An added advantage method adds very little drag next column will bring up topic moveable leadouts Richard L Perry 5016 Angelita Ave. Dayton OH 45424 FF Duration/Meuser continued page 44 Models Peck Heck Peck-Poly mers long famous its free flight scale sport kits plans hardware now heavily CO-2 power Peck stocks Brown single twin new Telco Shark motors Nite 16 kit built-up 16-span sport model now includes instructions converting CO-2 power can converted back rubber power minute two great interest CO-2 enthusiasts tanks offered Peck five sizes rang ing teeny l/4 cc 20 cc capacity too Peck offers goodie adapts Ansul fire-extinguisher cartridges three brands CO-2 motors provides flights fraction cost using small cartridges usually used Send Pecks complete catalog P0 Box 2498 La Mesa CA 92041 HLG Dethermalizer Four types have used varying degrees success dropping nose weight pop-up elevator spin-tab Geraghty system latter consists no DT lots gliders pop-up elevator type perfect ed Bill Blanchard seems increas ing popularity new twist old spin-tab device submitted Mark Drela fliers have abandoned spintab DT since tends produce screaming spiral dives defeats original pur pose bring glider down safely version spin-tab system destruc tion model avoided placing tab outside glide circle instead glide circle tightening suicidal spiral dive glide circle either opens up reverses glide path angle steepens about 30-degree angle horizontal nearly straight flight path moderately rapid descent model simply punches through strongest thermals hitching ride next county Other types DT-s have known ineffective strong thermals tab cut 010 brass 015 aluminum sheet 2 2 long glide angle sensitive width bottom flange can trimmed achieve desired angle descent some cases completely removed Turn ing effect can adjusted trimming Aol 1ffSolal 61DMFilm HOT FUEL PROOF DOPEEXCLUSIVE LOW-HEAT AWARD WINNINGCOVERING FOR HI-GLOSS AND FLATFOAM & BALSA FINISHES AVAILABLEFLYING MODELS IN OVER 36 COLORSflexible ble IN BRUSH AND SPRAYfuel pruuf tweight 51flC17 Industries Inc 7080 HOLLYWOOD BLVD LOS ANGELES CA 90028 length tab altering opening angle Sounds like its worth try HLG DT systems use fuses course common cause malfunction caused rub ber band pressing too tightly against fuse what worse pressing fuse against heat-robbing piece metal force rubberband should supported something other fuse such way presses lightly against fuse Bob Meuser 4200 Gregory St Oak land CA 94619 writing advertisers mention read about MA Big Boy/Langenberg continued page 47 length 1/32-in ID brass tubing rolled epoxied end 1/32 hinge wire connects blades hub Complete propeller assembly carving noseblock hard balsa ball bearings shaft thrust bearing spring shown drawing can obtained FAT Model Supply Box 9778 Phoenix AZ 85068 1/8 plywood insert glued rear nose block should fit snugly front fuseMay1977 99 / THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA
Edition: Model Aviation - 1977/05
Page Numbers: 31, 98, 99
Edition: Model Aviation - 1977/05
Page Numbers: 31, 98, 99
Navy Carrier Li Richard L Perry STARTED OUT last column write about some features models different other CL models am hoping remove some mystery event havent yet tried same time will try present variety methods might help experienced modeler around problem area might stimulate new idea column will deal tail hooks flaps ailerons chose lump items together because usually connected another some way Tail Hook function tail hook stop model during landing func tion intended hook end must approximately horizontal hook extended end hook points up could slide over first line passes hook must also able catch line model taxiing its normal three-point attitude 60-degree angle hook bend 60-degree extension should ensure both conditions met Fig 1 prefer land ng over stern five-foot altitude applying full down elevator boon Hot Stuff sales recommended th author seldom have chance catch line hook extended ex tended portion hook still impor tant controlled crash landing intentional otherwise produces consid erable bouncing can end up model perched main gear tail hook gracefully holding tail air An extension greater 60 degrees will increase possibility misfor tune positive stop lower hook position advantage spring holds hook down must adjust ed model will settle its normal three-point attitude gently lowered main gear tail hook Too little tension tail hook spring can cause another problemthe hook can bounce skip over lines after hitting deck first time using rubberbands actuate flaps tail hooks possible adjust tension required method shown Fig 2 puts little down force hook flap retracted force increases extend Profile Carrier models hook can mounted through fuselage using hardwood insert plywood facings fuselage brass tube bearing good idea removable simple hook instal lation suited classes shown Fig 2 landing gear clip used secure hook bearing fuselage 3/32 diameter wire best tail hook Lighter 1/16 wire will work hook portion reinforced prevent straightening landing tail hook used operate flaps must latched up during highspeed flight also prevents catching uneven deck joint during take off easiest common method attach L-hook music wire pushrod run through wire loop hook full down elevator applied momentarily hook released Some prefer use throttle movement release hook speed reduced requires additional wire tail Flaps Flaps allow wing generate higher lift coefficient produce addi tional drag aids slowing model no harder build ele vator should avoided because imagined complexity provide performance advantage low speed par ticularly Class II models common method flap actua tion shown Fig 1 Putting flap horn top keeps connecting wire tension flaps down allows lighter wire 045 used lighter rod can flex during arresting hook engagement ease shock flaps hook snapped back hook used simply release flaps actually pull down flaps spared abuse during land ings Fig 2 simplest methods have used purpose As hook extended L-shaped hook extension rotated out under wire attached flaps flaps extended spring rubberband Ailerons use ailerons has become increasingly popular recent years advantage long wing stalled model will bank away center circle improving line tension particular advantage up wind side circle two dis advantages First because down aileron flap causes drag up aileron result tendency turn model circle An effectivevertical stabi lizer can counter effect Second wing stalls down-aileron side inboard wing will stall first until outboard wing stalls too model will tend bank toward center circle phenomenon can produce some rather spectacular gyrationsat end lines effect pronounded thinner wings sharper leading edges Profile Carrier models effect ailerons can achieved shortening flap span outboard wing Class II models outboard aileron must move up inboard aileron moves down Therefore separate aileron Continued page 98 FIG 3 May1977 31 o FIG 1 FIG 4 BOX 511E HIGGINSVILLE MISSOURI 64037 agreed again sponsor unofficial Half-A precision aerobatics event 1977 Nationals Junior Senior Open competition will take place using com plete AMA pattern minus appearance points probable date would Satur day August 13 before after Walker Cup Flyoffs Engines limited total 051 maximum no requirement builder model rule however same plane may flown pilot Back-up model may used per AMA rules Airplanes must have iden tifying numbers per AMA rulebook ex cept numbers permissa ble event has developed popular lighthearted unofficial contest last years entry 25 spectator enthusiasm high Its worth watching fun competing event information PAMPA preci sion aerobatics write Wynn Paul 1640 Maywick Dr Lex KY 40504 Race/Kilsdonk continued page 53 next strategy involves pit race flexibility depends fuel capacity Since Rat Race Slow Rat pit required 70-lap races two pits required 140-lap races must capable least 47 laps per tank set models up go about 65-70 laps per tank Goodyear pit required 80-lap race three pits required 160-lapper requires least 40 laps per tank usually have capacity 60-65 laps per tank ideal race would have No 3 team pit first followed No 2 No 1 same lap intervals avoids possibility line snagging usually doesnt work however due differences air speeds Depending differences air speed fastest model will usually pit first followed others proportion relative air speed pilot usually has predetermined signals pit man will signal Like 40 80 120 laps Goodyear 4595 laps Rat pilot can size up strategy during race observing other models discussing other pilots model set up similar have about 20-lap cushion pit can used advantage pit either before after others right pit man has signaled pit pilot has determined best time should initiate shut down tripping shutoff slow MORE wi/A 13orn dIpw same powerYELLOW ~eteeteduePltCYX e~JBddC e\Wet'Tao 354304 Blade63 6-4354 Pusher74 76 78 504 [v32][b-1-10-1-10]]5ZSeach84 86 88654 Z 5~435/4 97118 6364 10-4 106056 8-685411-4 11-611-81 9-6106 1 3 Blade Tractor 55-3 5-4 6-36-4 504 3 Blade Pusher 6-3504 NC 12-4 T2-5 12-6 150 ORISH BROS ST JOHN INDIANA 46373 model down should give several full-up full-down controls use models wing air brake takes lots practice Start slow keep decreasing distance slow model down gradually What try to initiate fuel shut-off about before pit area No 1 pit loca tion can use wind help out No 3 pit position doesnt work well windy days wind will tend accelerate model just before landing pit man must now catch model refuel restart engine release lot time lost can under five seconds dependably 1975 Nationals Goodyear models finals very close air speed Yet able finish ahead several faster models because total pit stop time includes shut-down landing addition pit stop takeoff back air speed An excellent total pit stop includes time lost pit stop should less 15 seconds Have someone time though get one-flip start youll surprised amount lost time Another thing concentrate consistency Remember have make excellent pit stops time just good model now airborne again team must again prepare next pit stop entire sequence including new strategy based changes race must repeated again Actual contest experience much better realistic practice field So feel youre ready go out enter some contests potential hazards unforeseen circumstances contest will probably never encounter However experience experience lots practice will make winner CL Navy Carrier/Perry continued page 31 required release can run through wing throttle arm com mon method use flap movement operate release outboard aileron Fig 3 illustrates method used quite few Carrier medelers A bellcrank can used horns mounted top flap aileron connecting rods will tension can smaller diameter Fig 4 aileron release shown Leon Ryktarsyk As flap falls allows tin-stock plate rotate thus releasing aileron deflected spring rubberband lightest simplest method aileron actuation 98 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return [AU II Em have run across An added advantage method adds very little drag next column will bring up topic moveable leadouts Richard L Perry 5016 Angelita Ave. Dayton OH 45424 FF Duration/Meuser continued page 44 Models Peck Heck Peck-Poly mers long famous its free flight scale sport kits plans hardware now heavily CO-2 power Peck stocks Brown single twin new Telco Shark motors Nite 16 kit built-up 16-span sport model now includes instructions converting CO-2 power can converted back rubber power minute two great interest CO-2 enthusiasts tanks offered Peck five sizes rang ing teeny l/4 cc 20 cc capacity too Peck offers goodie adapts Ansul fire-extinguisher cartridges three brands CO-2 motors provides flights fraction cost using small cartridges usually used Send Pecks complete catalog P0 Box 2498 La Mesa CA 92041 HLG Dethermalizer Four types have used varying degrees success dropping nose weight pop-up elevator spin-tab Geraghty system latter consists no DT lots gliders pop-up elevator type perfect ed Bill Blanchard seems increas ing popularity new twist old spin-tab device submitted Mark Drela fliers have abandoned spintab DT since tends produce screaming spiral dives defeats original pur pose bring glider down safely version spin-tab system destruc tion model avoided placing tab outside glide circle instead glide circle tightening suicidal spiral dive glide circle either opens up reverses glide path angle steepens about 30-degree angle horizontal nearly straight flight path moderately rapid descent model simply punches through strongest thermals hitching ride next county Other types DT-s have known ineffective strong thermals tab cut 010 brass 015 aluminum sheet 2 2 long glide angle sensitive width bottom flange can trimmed achieve desired angle descent some cases completely removed Turn ing effect can adjusted trimming Aol 1ffSolal 61DMFilm HOT FUEL PROOF DOPEEXCLUSIVE LOW-HEAT AWARD WINNINGCOVERING FOR HI-GLOSS AND FLATFOAM & BALSA FINISHES AVAILABLEFLYING MODELS IN OVER 36 COLORSflexible ble IN BRUSH AND SPRAYfuel pruuf tweight 51flC17 Industries Inc 7080 HOLLYWOOD BLVD LOS ANGELES CA 90028 length tab altering opening angle Sounds like its worth try HLG DT systems use fuses course common cause malfunction caused rub ber band pressing too tightly against fuse what worse pressing fuse against heat-robbing piece metal force rubberband should supported something other fuse such way presses lightly against fuse Bob Meuser 4200 Gregory St Oak land CA 94619 writing advertisers mention read about MA Big Boy/Langenberg continued page 47 length 1/32-in ID brass tubing rolled epoxied end 1/32 hinge wire connects blades hub Complete propeller assembly carving noseblock hard balsa ball bearings shaft thrust bearing spring shown drawing can obtained FAT Model Supply Box 9778 Phoenix AZ 85068 1/8 plywood insert glued rear nose block should fit snugly front fuseMay1977 99 / THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA
Edition: Model Aviation - 1977/05
Page Numbers: 31, 98, 99
Navy Carrier Li Richard L Perry STARTED OUT last column write about some features models different other CL models am hoping remove some mystery event havent yet tried same time will try present variety methods might help experienced modeler around problem area might stimulate new idea column will deal tail hooks flaps ailerons chose lump items together because usually connected another some way Tail Hook function tail hook stop model during landing func tion intended hook end must approximately horizontal hook extended end hook points up could slide over first line passes hook must also able catch line model taxiing its normal three-point attitude 60-degree angle hook bend 60-degree extension should ensure both conditions met Fig 1 prefer land ng over stern five-foot altitude applying full down elevator boon Hot Stuff sales recommended th author seldom have chance catch line hook extended ex tended portion hook still impor tant controlled crash landing intentional otherwise produces consid erable bouncing can end up model perched main gear tail hook gracefully holding tail air An extension greater 60 degrees will increase possibility misfor tune positive stop lower hook position advantage spring holds hook down must adjust ed model will settle its normal three-point attitude gently lowered main gear tail hook Too little tension tail hook spring can cause another problemthe hook can bounce skip over lines after hitting deck first time using rubberbands actuate flaps tail hooks possible adjust tension required method shown Fig 2 puts little down force hook flap retracted force increases extend Profile Carrier models hook can mounted through fuselage using hardwood insert plywood facings fuselage brass tube bearing good idea removable simple hook instal lation suited classes shown Fig 2 landing gear clip used secure hook bearing fuselage 3/32 diameter wire best tail hook Lighter 1/16 wire will work hook portion reinforced prevent straightening landing tail hook used operate flaps must latched up during highspeed flight also prevents catching uneven deck joint during take off easiest common method attach L-hook music wire pushrod run through wire loop hook full down elevator applied momentarily hook released Some prefer use throttle movement release hook speed reduced requires additional wire tail Flaps Flaps allow wing generate higher lift coefficient produce addi tional drag aids slowing model no harder build ele vator should avoided because imagined complexity provide performance advantage low speed par ticularly Class II models common method flap actua tion shown Fig 1 Putting flap horn top keeps connecting wire tension flaps down allows lighter wire 045 used lighter rod can flex during arresting hook engagement ease shock flaps hook snapped back hook used simply release flaps actually pull down flaps spared abuse during land ings Fig 2 simplest methods have used purpose As hook extended L-shaped hook extension rotated out under wire attached flaps flaps extended spring rubberband Ailerons use ailerons has become increasingly popular recent years advantage long wing stalled model will bank away center circle improving line tension particular advantage up wind side circle two dis advantages First because down aileron flap causes drag up aileron result tendency turn model circle An effectivevertical stabi lizer can counter effect Second wing stalls down-aileron side inboard wing will stall first until outboard wing stalls too model will tend bank toward center circle phenomenon can produce some rather spectacular gyrationsat end lines effect pronounded thinner wings sharper leading edges Profile Carrier models effect ailerons can achieved shortening flap span outboard wing Class II models outboard aileron must move up inboard aileron moves down Therefore separate aileron Continued page 98 FIG 3 May1977 31 o FIG 1 FIG 4 BOX 511E HIGGINSVILLE MISSOURI 64037 agreed again sponsor unofficial Half-A precision aerobatics event 1977 Nationals Junior Senior Open competition will take place using com plete AMA pattern minus appearance points probable date would Satur day August 13 before after Walker Cup Flyoffs Engines limited total 051 maximum no requirement builder model rule however same plane may flown pilot Back-up model may used per AMA rules Airplanes must have iden tifying numbers per AMA rulebook ex cept numbers permissa ble event has developed popular lighthearted unofficial contest last years entry 25 spectator enthusiasm high Its worth watching fun competing event information PAMPA preci sion aerobatics write Wynn Paul 1640 Maywick Dr Lex KY 40504 Race/Kilsdonk continued page 53 next strategy involves pit race flexibility depends fuel capacity Since Rat Race Slow Rat pit required 70-lap races two pits required 140-lap races must capable least 47 laps per tank set models up go about 65-70 laps per tank Goodyear pit required 80-lap race three pits required 160-lapper requires least 40 laps per tank usually have capacity 60-65 laps per tank ideal race would have No 3 team pit first followed No 2 No 1 same lap intervals avoids possibility line snagging usually doesnt work however due differences air speeds Depending differences air speed fastest model will usually pit first followed others proportion relative air speed pilot usually has predetermined signals pit man will signal Like 40 80 120 laps Goodyear 4595 laps Rat pilot can size up strategy during race observing other models discussing other pilots model set up similar have about 20-lap cushion pit can used advantage pit either before after others right pit man has signaled pit pilot has determined best time should initiate shut down tripping shutoff slow MORE wi/A 13orn dIpw same powerYELLOW ~eteeteduePltCYX e~JBddC e\Wet'Tao 354304 Blade63 6-4354 Pusher74 76 78 504 [v32][b-1-10-1-10]]5ZSeach84 86 88654 Z 5~435/4 97118 6364 10-4 106056 8-685411-4 11-611-81 9-6106 1 3 Blade Tractor 55-3 5-4 6-36-4 504 3 Blade Pusher 6-3504 NC 12-4 T2-5 12-6 150 ORISH BROS ST JOHN INDIANA 46373 model down should give several full-up full-down controls use models wing air brake takes lots practice Start slow keep decreasing distance slow model down gradually What try to initiate fuel shut-off about before pit area No 1 pit loca tion can use wind help out No 3 pit position doesnt work well windy days wind will tend accelerate model just before landing pit man must now catch model refuel restart engine release lot time lost can under five seconds dependably 1975 Nationals Goodyear models finals very close air speed Yet able finish ahead several faster models because total pit stop time includes shut-down landing addition pit stop takeoff back air speed An excellent total pit stop includes time lost pit stop should less 15 seconds Have someone time though get one-flip start youll surprised amount lost time Another thing concentrate consistency Remember have make excellent pit stops time just good model now airborne again team must again prepare next pit stop entire sequence including new strategy based changes race must repeated again Actual contest experience much better realistic practice field So feel youre ready go out enter some contests potential hazards unforeseen circumstances contest will probably never encounter However experience experience lots practice will make winner CL Navy Carrier/Perry continued page 31 required release can run through wing throttle arm com mon method use flap movement operate release outboard aileron Fig 3 illustrates method used quite few Carrier medelers A bellcrank can used horns mounted top flap aileron connecting rods will tension can smaller diameter Fig 4 aileron release shown Leon Ryktarsyk As flap falls allows tin-stock plate rotate thus releasing aileron deflected spring rubberband lightest simplest method aileron actuation 98 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return [AU II Em have run across An added advantage method adds very little drag next column will bring up topic moveable leadouts Richard L Perry 5016 Angelita Ave. Dayton OH 45424 FF Duration/Meuser continued page 44 Models Peck Heck Peck-Poly mers long famous its free flight scale sport kits plans hardware now heavily CO-2 power Peck stocks Brown single twin new Telco Shark motors Nite 16 kit built-up 16-span sport model now includes instructions converting CO-2 power can converted back rubber power minute two great interest CO-2 enthusiasts tanks offered Peck five sizes rang ing teeny l/4 cc 20 cc capacity too Peck offers goodie adapts Ansul fire-extinguisher cartridges three brands CO-2 motors provides flights fraction cost using small cartridges usually used Send Pecks complete catalog P0 Box 2498 La Mesa CA 92041 HLG Dethermalizer Four types have used varying degrees success dropping nose weight pop-up elevator spin-tab Geraghty system latter consists no DT lots gliders pop-up elevator type perfect ed Bill Blanchard seems increas ing popularity new twist old spin-tab device submitted Mark Drela fliers have abandoned spintab DT since tends produce screaming spiral dives defeats original pur pose bring glider down safely version spin-tab system destruc tion model avoided placing tab outside glide circle instead glide circle tightening suicidal spiral dive glide circle either opens up reverses glide path angle steepens about 30-degree angle horizontal nearly straight flight path moderately rapid descent model simply punches through strongest thermals hitching ride next county Other types DT-s have known ineffective strong thermals tab cut 010 brass 015 aluminum sheet 2 2 long glide angle sensitive width bottom flange can trimmed achieve desired angle descent some cases completely removed Turn ing effect can adjusted trimming Aol 1ffSolal 61DMFilm HOT FUEL PROOF DOPEEXCLUSIVE LOW-HEAT AWARD WINNINGCOVERING FOR HI-GLOSS AND FLATFOAM & BALSA FINISHES AVAILABLEFLYING MODELS IN OVER 36 COLORSflexible ble IN BRUSH AND SPRAYfuel pruuf tweight 51flC17 Industries Inc 7080 HOLLYWOOD BLVD LOS ANGELES CA 90028 length tab altering opening angle Sounds like its worth try HLG DT systems use fuses course common cause malfunction caused rub ber band pressing too tightly against fuse what worse pressing fuse against heat-robbing piece metal force rubberband should supported something other fuse such way presses lightly against fuse Bob Meuser 4200 Gregory St Oak land CA 94619 writing advertisers mention read about MA Big Boy/Langenberg continued page 47 length 1/32-in ID brass tubing rolled epoxied end 1/32 hinge wire connects blades hub Complete propeller assembly carving noseblock hard balsa ball bearings shaft thrust bearing spring shown drawing can obtained FAT Model Supply Box 9778 Phoenix AZ 85068 1/8 plywood insert glued rear nose block should fit snugly front fuseMay1977 99 / THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA
