WHETHER call Quarter Scale Mam moth Scale Monster Scale popular new breed big models just BIG big has mean heavy necessarily heavy relation size heavy terms actual pounds Fifteen 30 pounds roughly range ground gear has three five times load weve used rough landing forces really climb model industry already starting react situation offering beefed-up retract units larger sizes music wire However Monster models may have low wing power loadings wings stop supporting weight gear has take load three five times greater weve used Designed Curtiss Sparrowhawk Bobs gear will function 45 G landingE Bob Beckman 44 Model Aviation big birds compared three 10 pounds current sport pattem models quarter scalers often have lower wing power loadings helptheir performance air wings stop supporting weight landing gear has pull off hold-up job Just sitting Close rear view main gear mounting fuselage Note travel-restraint screw shock strut Dont worry 10 mounting screws will place before flies quarter-scale builders finding answers problems often lie scaling down full-size practice scaling up modeling methods can particularly true land ing gear accompanying photographs drawings illustrate point applied -scale Curtiss Sparrowhawk presently under construc tion fact considering F9C-2 subject felt landing gear question tackled first Another local monster man having some problems landing gear recently completed model main gear struts made l rod other wise followed common model practice rigid mounting depending flexing struts absorb landing shocks After first few flights gear beefed up adding some 3/16 music wire still just barely adequate view experience decided design build Sparrowhawk landing gear before going rest project Typical landing gear design early 30s involved rigid struts positioned axle free rotate about mounting fuselage shock strut attached close axle mounted nearly vertical possible Sparrowhawk axle strut perpendicular fuselage centerline rearward slanted drag strut hinged near bottom center fuselage upper end shock strut attached high fuselage side addi tion low-pressure tires used help cushion landing shocks Working Peter Westburg drawings F9C-2 one-quarter scale sketch landing gear system developed seemed scale-like operation gear feasible shock strut scaled out just over 5A thick axle drag struts YB would OWERPPER SIDE SEWS OF BRASS SPUCK STRUT FITTINDS 0 END VIEWTSP yEW GALE BLSCN D NUM P L AT E I/A PO BULEHEADS 12 I/N SPRINUPINSISALUMINUM MEANT NA RATE0 SPRING -7CLEARANCE HALES 7FER 1S32 SCREWS TRAVEL RESTRAINT SLAT PACE STRUT RAND FIBRE TUBINGAu FAIRINUS AND OPEN AIR AUTER l/D INNER I / FACE WHEEL PANTS ARE _______________-SUCUM FORMED PLAATC DRILED AND TAPPED R-3D FDR TRAVEL RESTRAINT SCREW VIEW THROUGH'CLEVIS PARTS DRILLED AND THROUSH TAPPED FDN FARWAIADSTNUTS0-32 SCREWS TYPICALI AU ESTR.TERAS STRUT BOTH 3/RALUMINUM ROD TRUE VIEW OFARLE AND SNAG STPUTASSEMRLF DRILED AND TAPPED FAN N-3D MACPINE SCREW NYLON WASRERS IN LANDING GEAR ASSEMBLY fBr / SCALE CURTIS FSC-2 SPARROWNAWE 7/fl May 1980 45 Tailwheel extraordinaire View shows entire assembly Steering cables will linked rudder control cables allow use ng inside ng shock strut ng rod positioning struts Thin plastic fairings would bring struts final scale size shape Du-Bro 6-in wheels scale size inflation pressure can varied get scale tire action Everything looked good construction main gear started first step design make blocks connect struts wheel axles together axles themselves turned brass rod integral wheel retainers no small set screws depended upon secure wheels piece c wire pressed through center axle strengthen axle blocks machined -thick aluminum plate axle drag struts /8 aluminum rod axle strut fits hole inboard end axle block hole drilled angle required properly position axle axle fits hole drilled through length axle block axle strut axle place axle strut locked axle block axle turn held block three 6-32 machine screws end drag strut cut proper angle secured 6-32 screw through axle block axle strut upper end axle strut slotted drilled form clevis fits 01 aluminum mounting plate fuselage Because angle drag strut its upper end fitted brass knuckle attaches strut another mounting plate strut-axle-wheel assemblies rotate freely about attachment points fuselage shock strut linking Outer end axle block point high fuselage side restrains motion axle assembly absorbs landing shock strut composed telescoping pieLes hard fibre tubing compression spring brass end fittings prototype strut made alumi num tubing final struts made hard fibre tube since about 20% lighter aluminum sizes involved strong enough end fittings machined brass secured tubing 1/16 spring pins compression springs designed use stripper plates knockouts etc large punch presses made wide variety sizes strenhsThe spring selected F9C-2 has load capacity 30 lb/in 1 inches shock strut travel leg must see 45 lb force before strut bottoms 20pound airplane means gear still func tioning up 45G landing Add shock absorbing action wheels gear should able handle unreasonably rough landings upward travel gear limited fully compressed length spring limit downward travel also required slot milled back side outer shock strut tube An 8-32 machine screw upper end inner tubing limits downward travel gear proper in-flight position main gear hand attention turned tailwheel Sparrowhawk Since plane capable carrier landings basic idea ofa positioning strut near vertical shock strut also applied tailwheel original plane primary dif ferences main gear single positioning strut shock spring mounted out side shock strut steerable wheel fork Again one-quarter-scale sketch showed feasibility scale-like operation inum plate rod used struts s tubing forms upper portion shock strut aluminum rod lower portion turned down slide inside tubing shock spring pinned strut end provides both upper lower travel limits An aluminum block similar main gear axle blocks connects two struts steerable wheel fork Steering will cables linked rudder control cables design construction Sparrowhawk landing gear first seemed like formidable task end turned out straightforward relatively simple lot machining required can done hobby type lathe/milling machines ma terials used readily available McMaster Carr Supply Co manufacturers supply house Chicago lists everything needed catalog got hard fibre tube #8654K21 OD #8654K26 OD compression springs Continued page 111 46 Model Aviation nut IU1U Ut Irufli UIU ruar riuurutiuuy PIdIU3 WIfl siruis SiiaCflOO Rear view left axle block assembly wheel removed Two set screws front back plus cap screw top hold axle securely place axle block Front view right axle block assembly wheel installed wheel hub installed around axle axle installed axle block thereby locking axle strut place Closeup rear mounting plate Brass knuckles drag struts allow angled strut rotate same axis forward axle strut assures free movement complex landing gear system THE TRIPLE THREAT Del N QUIKRAY-500 has eneered meet need model could built fast very strong meet requirements AMA Sport Pylon Events Quicky 500 Pylon Racing Fun Fly Events around Sport Flying Trainer general Pattern Flyinp baby strong Buil lightandfast baby will turn Pylon tighter ything youhaveseen will snap stall out. QUIKRAY-500 can built complete air Twelve Fifteen hours covered materials such SUPER MONOKOTE other covering same family U ANDUEJI AUCIAFT uRODIL CO INC 500 FAST IS WHAT SHE IS DOCILE Winpspan 50 inArea 503 sqin Engine 1945Weight 3/s lbs Material AU Balsa Ply needed I The AD engine used Goodyear shows lot promise available sufficient quantities has 12mm crankshaft should strong enough take rigors Control Line racing Al Kelly tells engine available will run about $135 anyone interested should contact him 2 The SWCLA Big Goodyear rules have modified slightly result meeting held Buckeye significance required pit stop shut-offs allowed used safety purposes other reason Contact Bob Reynolds Buckeye CD specifics 3 The K&B 58 very competitive limited capacity events Miller needed practice weekend sort out problems really get competitive Big GY way exact same situation last year ACLA Slow Rat 4 In limited capacity events normal emphasis competitors range expense speed appears practice get testing latest super fuel brew will get enough range almost seems afraid pit stops AMA events contrast require pit stops As consequence AMA competitors practice pitting great fervor bottom line good pitting lot better airspeed can make up decreased range would suggest ACLA SWCLA competitors practice pitting worry much about missing range OK know fast plane range still going win majority competitors Mostly slow long go fast pit better couple poems friends Buckeye First ACLA Slow Rat friends Roses red Violets blue Last year practice year got SWCLA Big Goodyearfriends Roses red Violets blue year Slow Rat Next year too W R Lee 3522 Tamarisk Lane Missouri City TX 77459 Hold- U p/Beckman continued page 46 main gear#9620K 12 aluminum blocks brass end fittings machine shop scraps 3/ aluminum rod available hard ware stores cheated tumed down 3/~ 4 brass tubing available hobby shop tail wheel shock spring came hardware store Although gear described designed specific airplanethe Curtiss F9C-2 Spar rowhawk ethe basic methods applicable subject reasonably large size youre restricted fixed-gear aircraft minds eye keep getting glimpses -scale Grumman F3F-3 wheels slowly pulling up fuselage sides SAFE FLYING IS NO ACCIDENT let conclude column Safety/Preston continued page 47 34 No usually 4 6 models permitted air once 35 There shall no flying before fter 6 There shall no flying during runway mowing operations 37 Fliers shall consume alcoholic beverages drugs flying field Other Rules necessarily related safety 38 Anything bring flying field shall removed depart 39 Pets shall confined spectator area 40 Members must display club identification pennant badge transmitter antenna jacket 41 No person shall attempt fly model out being accompanied instructor unless have reached minimum flight proficiency level following two rules have seen clubs field safety rules considerthemto significance accident free operation 42 Gasoline fueled models shall confined No Smoking area pits 43 No person shall attempt start engine fly model alone flying field So have itquite formidable list perhaps too long minimum degree safety average clubs flying site However have no doubt clubs other rules existence may have missed club drop us line think have missed something important club large say over 100 members May 1980 111 / OF LIGHT AND QUIK ITS FULL TIGER EATING GRINS!! AAmco Inc humbly say no more
Edition: Model Aviation - 1980/05
Page Numbers: 44, 45, 46, 111
WHETHER call Quarter Scale Mam moth Scale Monster Scale popular new breed big models just BIG big has mean heavy necessarily heavy relation size heavy terms actual pounds Fifteen 30 pounds roughly range ground gear has three five times load weve used rough landing forces really climb model industry already starting react situation offering beefed-up retract units larger sizes music wire However Monster models may have low wing power loadings wings stop supporting weight gear has take load three five times greater weve used Designed Curtiss Sparrowhawk Bobs gear will function 45 G landingE Bob Beckman 44 Model Aviation big birds compared three 10 pounds current sport pattem models quarter scalers often have lower wing power loadings helptheir performance air wings stop supporting weight landing gear has pull off hold-up job Just sitting Close rear view main gear mounting fuselage Note travel-restraint screw shock strut Dont worry 10 mounting screws will place before flies quarter-scale builders finding answers problems often lie scaling down full-size practice scaling up modeling methods can particularly true land ing gear accompanying photographs drawings illustrate point applied -scale Curtiss Sparrowhawk presently under construc tion fact considering F9C-2 subject felt landing gear question tackled first Another local monster man having some problems landing gear recently completed model main gear struts made l rod other wise followed common model practice rigid mounting depending flexing struts absorb landing shocks After first few flights gear beefed up adding some 3/16 music wire still just barely adequate view experience decided design build Sparrowhawk landing gear before going rest project Typical landing gear design early 30s involved rigid struts positioned axle free rotate about mounting fuselage shock strut attached close axle mounted nearly vertical possible Sparrowhawk axle strut perpendicular fuselage centerline rearward slanted drag strut hinged near bottom center fuselage upper end shock strut attached high fuselage side addi tion low-pressure tires used help cushion landing shocks Working Peter Westburg drawings F9C-2 one-quarter scale sketch landing gear system developed seemed scale-like operation gear feasible shock strut scaled out just over 5A thick axle drag struts YB would OWERPPER SIDE SEWS OF BRASS SPUCK STRUT FITTINDS 0 END VIEWTSP yEW GALE BLSCN D NUM P L AT E I/A PO BULEHEADS 12 I/N SPRINUPINSISALUMINUM MEANT NA RATE0 SPRING -7CLEARANCE HALES 7FER 1S32 SCREWS TRAVEL RESTRAINT SLAT PACE STRUT RAND FIBRE TUBINGAu FAIRINUS AND OPEN AIR AUTER l/D INNER I / FACE WHEEL PANTS ARE _______________-SUCUM FORMED PLAATC DRILED AND TAPPED R-3D FDR TRAVEL RESTRAINT SCREW VIEW THROUGH'CLEVIS PARTS DRILLED AND THROUSH TAPPED FDN FARWAIADSTNUTS0-32 SCREWS TYPICALI AU ESTR.TERAS STRUT BOTH 3/RALUMINUM ROD TRUE VIEW OFARLE AND SNAG STPUTASSEMRLF DRILED AND TAPPED FAN N-3D MACPINE SCREW NYLON WASRERS IN LANDING GEAR ASSEMBLY fBr / SCALE CURTIS FSC-2 SPARROWNAWE 7/fl May 1980 45 Tailwheel extraordinaire View shows entire assembly Steering cables will linked rudder control cables allow use ng inside ng shock strut ng rod positioning struts Thin plastic fairings would bring struts final scale size shape Du-Bro 6-in wheels scale size inflation pressure can varied get scale tire action Everything looked good construction main gear started first step design make blocks connect struts wheel axles together axles themselves turned brass rod integral wheel retainers no small set screws depended upon secure wheels piece c wire pressed through center axle strengthen axle blocks machined -thick aluminum plate axle drag struts /8 aluminum rod axle strut fits hole inboard end axle block hole drilled angle required properly position axle axle fits hole drilled through length axle block axle strut axle place axle strut locked axle block axle turn held block three 6-32 machine screws end drag strut cut proper angle secured 6-32 screw through axle block axle strut upper end axle strut slotted drilled form clevis fits 01 aluminum mounting plate fuselage Because angle drag strut its upper end fitted brass knuckle attaches strut another mounting plate strut-axle-wheel assemblies rotate freely about attachment points fuselage shock strut linking Outer end axle block point high fuselage side restrains motion axle assembly absorbs landing shock strut composed telescoping pieLes hard fibre tubing compression spring brass end fittings prototype strut made alumi num tubing final struts made hard fibre tube since about 20% lighter aluminum sizes involved strong enough end fittings machined brass secured tubing 1/16 spring pins compression springs designed use stripper plates knockouts etc large punch presses made wide variety sizes strenhsThe spring selected F9C-2 has load capacity 30 lb/in 1 inches shock strut travel leg must see 45 lb force before strut bottoms 20pound airplane means gear still func tioning up 45G landing Add shock absorbing action wheels gear should able handle unreasonably rough landings upward travel gear limited fully compressed length spring limit downward travel also required slot milled back side outer shock strut tube An 8-32 machine screw upper end inner tubing limits downward travel gear proper in-flight position main gear hand attention turned tailwheel Sparrowhawk Since plane capable carrier landings basic idea ofa positioning strut near vertical shock strut also applied tailwheel original plane primary dif ferences main gear single positioning strut shock spring mounted out side shock strut steerable wheel fork Again one-quarter-scale sketch showed feasibility scale-like operation inum plate rod used struts s tubing forms upper portion shock strut aluminum rod lower portion turned down slide inside tubing shock spring pinned strut end provides both upper lower travel limits An aluminum block similar main gear axle blocks connects two struts steerable wheel fork Steering will cables linked rudder control cables design construction Sparrowhawk landing gear first seemed like formidable task end turned out straightforward relatively simple lot machining required can done hobby type lathe/milling machines ma terials used readily available McMaster Carr Supply Co manufacturers supply house Chicago lists everything needed catalog got hard fibre tube #8654K21 OD #8654K26 OD compression springs Continued page 111 46 Model Aviation nut IU1U Ut Irufli UIU ruar riuurutiuuy PIdIU3 WIfl siruis SiiaCflOO Rear view left axle block assembly wheel removed Two set screws front back plus cap screw top hold axle securely place axle block Front view right axle block assembly wheel installed wheel hub installed around axle axle installed axle block thereby locking axle strut place Closeup rear mounting plate Brass knuckles drag struts allow angled strut rotate same axis forward axle strut assures free movement complex landing gear system THE TRIPLE THREAT Del N QUIKRAY-500 has eneered meet need model could built fast very strong meet requirements AMA Sport Pylon Events Quicky 500 Pylon Racing Fun Fly Events around Sport Flying Trainer general Pattern Flyinp baby strong Buil lightandfast baby will turn Pylon tighter ything youhaveseen will snap stall out. QUIKRAY-500 can built complete air Twelve Fifteen hours covered materials such SUPER MONOKOTE other covering same family U ANDUEJI AUCIAFT uRODIL CO INC 500 FAST IS WHAT SHE IS DOCILE Winpspan 50 inArea 503 sqin Engine 1945Weight 3/s lbs Material AU Balsa Ply needed I The AD engine used Goodyear shows lot promise available sufficient quantities has 12mm crankshaft should strong enough take rigors Control Line racing Al Kelly tells engine available will run about $135 anyone interested should contact him 2 The SWCLA Big Goodyear rules have modified slightly result meeting held Buckeye significance required pit stop shut-offs allowed used safety purposes other reason Contact Bob Reynolds Buckeye CD specifics 3 The K&B 58 very competitive limited capacity events Miller needed practice weekend sort out problems really get competitive Big GY way exact same situation last year ACLA Slow Rat 4 In limited capacity events normal emphasis competitors range expense speed appears practice get testing latest super fuel brew will get enough range almost seems afraid pit stops AMA events contrast require pit stops As consequence AMA competitors practice pitting great fervor bottom line good pitting lot better airspeed can make up decreased range would suggest ACLA SWCLA competitors practice pitting worry much about missing range OK know fast plane range still going win majority competitors Mostly slow long go fast pit better couple poems friends Buckeye First ACLA Slow Rat friends Roses red Violets blue Last year practice year got SWCLA Big Goodyearfriends Roses red Violets blue year Slow Rat Next year too W R Lee 3522 Tamarisk Lane Missouri City TX 77459 Hold- U p/Beckman continued page 46 main gear#9620K 12 aluminum blocks brass end fittings machine shop scraps 3/ aluminum rod available hard ware stores cheated tumed down 3/~ 4 brass tubing available hobby shop tail wheel shock spring came hardware store Although gear described designed specific airplanethe Curtiss F9C-2 Spar rowhawk ethe basic methods applicable subject reasonably large size youre restricted fixed-gear aircraft minds eye keep getting glimpses -scale Grumman F3F-3 wheels slowly pulling up fuselage sides SAFE FLYING IS NO ACCIDENT let conclude column Safety/Preston continued page 47 34 No usually 4 6 models permitted air once 35 There shall no flying before fter 6 There shall no flying during runway mowing operations 37 Fliers shall consume alcoholic beverages drugs flying field Other Rules necessarily related safety 38 Anything bring flying field shall removed depart 39 Pets shall confined spectator area 40 Members must display club identification pennant badge transmitter antenna jacket 41 No person shall attempt fly model out being accompanied instructor unless have reached minimum flight proficiency level following two rules have seen clubs field safety rules considerthemto significance accident free operation 42 Gasoline fueled models shall confined No Smoking area pits 43 No person shall attempt start engine fly model alone flying field So have itquite formidable list perhaps too long minimum degree safety average clubs flying site However have no doubt clubs other rules existence may have missed club drop us line think have missed something important club large say over 100 members May 1980 111 / OF LIGHT AND QUIK ITS FULL TIGER EATING GRINS!! AAmco Inc humbly say no more
Edition: Model Aviation - 1980/05
Page Numbers: 44, 45, 46, 111
WHETHER call Quarter Scale Mam moth Scale Monster Scale popular new breed big models just BIG big has mean heavy necessarily heavy relation size heavy terms actual pounds Fifteen 30 pounds roughly range ground gear has three five times load weve used rough landing forces really climb model industry already starting react situation offering beefed-up retract units larger sizes music wire However Monster models may have low wing power loadings wings stop supporting weight gear has take load three five times greater weve used Designed Curtiss Sparrowhawk Bobs gear will function 45 G landingE Bob Beckman 44 Model Aviation big birds compared three 10 pounds current sport pattem models quarter scalers often have lower wing power loadings helptheir performance air wings stop supporting weight landing gear has pull off hold-up job Just sitting Close rear view main gear mounting fuselage Note travel-restraint screw shock strut Dont worry 10 mounting screws will place before flies quarter-scale builders finding answers problems often lie scaling down full-size practice scaling up modeling methods can particularly true land ing gear accompanying photographs drawings illustrate point applied -scale Curtiss Sparrowhawk presently under construc tion fact considering F9C-2 subject felt landing gear question tackled first Another local monster man having some problems landing gear recently completed model main gear struts made l rod other wise followed common model practice rigid mounting depending flexing struts absorb landing shocks After first few flights gear beefed up adding some 3/16 music wire still just barely adequate view experience decided design build Sparrowhawk landing gear before going rest project Typical landing gear design early 30s involved rigid struts positioned axle free rotate about mounting fuselage shock strut attached close axle mounted nearly vertical possible Sparrowhawk axle strut perpendicular fuselage centerline rearward slanted drag strut hinged near bottom center fuselage upper end shock strut attached high fuselage side addi tion low-pressure tires used help cushion landing shocks Working Peter Westburg drawings F9C-2 one-quarter scale sketch landing gear system developed seemed scale-like operation gear feasible shock strut scaled out just over 5A thick axle drag struts YB would OWERPPER SIDE SEWS OF BRASS SPUCK STRUT FITTINDS 0 END VIEWTSP yEW GALE BLSCN D NUM P L AT E I/A PO BULEHEADS 12 I/N SPRINUPINSISALUMINUM MEANT NA RATE0 SPRING -7CLEARANCE HALES 7FER 1S32 SCREWS TRAVEL RESTRAINT SLAT PACE STRUT RAND FIBRE TUBINGAu FAIRINUS AND OPEN AIR AUTER l/D INNER I / FACE WHEEL PANTS ARE _______________-SUCUM FORMED PLAATC DRILED AND TAPPED R-3D FDR TRAVEL RESTRAINT SCREW VIEW THROUGH'CLEVIS PARTS DRILLED AND THROUSH TAPPED FDN FARWAIADSTNUTS0-32 SCREWS TYPICALI AU ESTR.TERAS STRUT BOTH 3/RALUMINUM ROD TRUE VIEW OFARLE AND SNAG STPUTASSEMRLF DRILED AND TAPPED FAN N-3D MACPINE SCREW NYLON WASRERS IN LANDING GEAR ASSEMBLY fBr / SCALE CURTIS FSC-2 SPARROWNAWE 7/fl May 1980 45 Tailwheel extraordinaire View shows entire assembly Steering cables will linked rudder control cables allow use ng inside ng shock strut ng rod positioning struts Thin plastic fairings would bring struts final scale size shape Du-Bro 6-in wheels scale size inflation pressure can varied get scale tire action Everything looked good construction main gear started first step design make blocks connect struts wheel axles together axles themselves turned brass rod integral wheel retainers no small set screws depended upon secure wheels piece c wire pressed through center axle strengthen axle blocks machined -thick aluminum plate axle drag struts /8 aluminum rod axle strut fits hole inboard end axle block hole drilled angle required properly position axle axle fits hole drilled through length axle block axle strut axle place axle strut locked axle block axle turn held block three 6-32 machine screws end drag strut cut proper angle secured 6-32 screw through axle block axle strut upper end axle strut slotted drilled form clevis fits 01 aluminum mounting plate fuselage Because angle drag strut its upper end fitted brass knuckle attaches strut another mounting plate strut-axle-wheel assemblies rotate freely about attachment points fuselage shock strut linking Outer end axle block point high fuselage side restrains motion axle assembly absorbs landing shock strut composed telescoping pieLes hard fibre tubing compression spring brass end fittings prototype strut made alumi num tubing final struts made hard fibre tube since about 20% lighter aluminum sizes involved strong enough end fittings machined brass secured tubing 1/16 spring pins compression springs designed use stripper plates knockouts etc large punch presses made wide variety sizes strenhsThe spring selected F9C-2 has load capacity 30 lb/in 1 inches shock strut travel leg must see 45 lb force before strut bottoms 20pound airplane means gear still func tioning up 45G landing Add shock absorbing action wheels gear should able handle unreasonably rough landings upward travel gear limited fully compressed length spring limit downward travel also required slot milled back side outer shock strut tube An 8-32 machine screw upper end inner tubing limits downward travel gear proper in-flight position main gear hand attention turned tailwheel Sparrowhawk Since plane capable carrier landings basic idea ofa positioning strut near vertical shock strut also applied tailwheel original plane primary dif ferences main gear single positioning strut shock spring mounted out side shock strut steerable wheel fork Again one-quarter-scale sketch showed feasibility scale-like operation inum plate rod used struts s tubing forms upper portion shock strut aluminum rod lower portion turned down slide inside tubing shock spring pinned strut end provides both upper lower travel limits An aluminum block similar main gear axle blocks connects two struts steerable wheel fork Steering will cables linked rudder control cables design construction Sparrowhawk landing gear first seemed like formidable task end turned out straightforward relatively simple lot machining required can done hobby type lathe/milling machines ma terials used readily available McMaster Carr Supply Co manufacturers supply house Chicago lists everything needed catalog got hard fibre tube #8654K21 OD #8654K26 OD compression springs Continued page 111 46 Model Aviation nut IU1U Ut Irufli UIU ruar riuurutiuuy PIdIU3 WIfl siruis SiiaCflOO Rear view left axle block assembly wheel removed Two set screws front back plus cap screw top hold axle securely place axle block Front view right axle block assembly wheel installed wheel hub installed around axle axle installed axle block thereby locking axle strut place Closeup rear mounting plate Brass knuckles drag struts allow angled strut rotate same axis forward axle strut assures free movement complex landing gear system THE TRIPLE THREAT Del N QUIKRAY-500 has eneered meet need model could built fast very strong meet requirements AMA Sport Pylon Events Quicky 500 Pylon Racing Fun Fly Events around Sport Flying Trainer general Pattern Flyinp baby strong Buil lightandfast baby will turn Pylon tighter ything youhaveseen will snap stall out. QUIKRAY-500 can built complete air Twelve Fifteen hours covered materials such SUPER MONOKOTE other covering same family U ANDUEJI AUCIAFT uRODIL CO INC 500 FAST IS WHAT SHE IS DOCILE Winpspan 50 inArea 503 sqin Engine 1945Weight 3/s lbs Material AU Balsa Ply needed I The AD engine used Goodyear shows lot promise available sufficient quantities has 12mm crankshaft should strong enough take rigors Control Line racing Al Kelly tells engine available will run about $135 anyone interested should contact him 2 The SWCLA Big Goodyear rules have modified slightly result meeting held Buckeye significance required pit stop shut-offs allowed used safety purposes other reason Contact Bob Reynolds Buckeye CD specifics 3 The K&B 58 very competitive limited capacity events Miller needed practice weekend sort out problems really get competitive Big GY way exact same situation last year ACLA Slow Rat 4 In limited capacity events normal emphasis competitors range expense speed appears practice get testing latest super fuel brew will get enough range almost seems afraid pit stops AMA events contrast require pit stops As consequence AMA competitors practice pitting great fervor bottom line good pitting lot better airspeed can make up decreased range would suggest ACLA SWCLA competitors practice pitting worry much about missing range OK know fast plane range still going win majority competitors Mostly slow long go fast pit better couple poems friends Buckeye First ACLA Slow Rat friends Roses red Violets blue Last year practice year got SWCLA Big Goodyearfriends Roses red Violets blue year Slow Rat Next year too W R Lee 3522 Tamarisk Lane Missouri City TX 77459 Hold- U p/Beckman continued page 46 main gear#9620K 12 aluminum blocks brass end fittings machine shop scraps 3/ aluminum rod available hard ware stores cheated tumed down 3/~ 4 brass tubing available hobby shop tail wheel shock spring came hardware store Although gear described designed specific airplanethe Curtiss F9C-2 Spar rowhawk ethe basic methods applicable subject reasonably large size youre restricted fixed-gear aircraft minds eye keep getting glimpses -scale Grumman F3F-3 wheels slowly pulling up fuselage sides SAFE FLYING IS NO ACCIDENT let conclude column Safety/Preston continued page 47 34 No usually 4 6 models permitted air once 35 There shall no flying before fter 6 There shall no flying during runway mowing operations 37 Fliers shall consume alcoholic beverages drugs flying field Other Rules necessarily related safety 38 Anything bring flying field shall removed depart 39 Pets shall confined spectator area 40 Members must display club identification pennant badge transmitter antenna jacket 41 No person shall attempt fly model out being accompanied instructor unless have reached minimum flight proficiency level following two rules have seen clubs field safety rules considerthemto significance accident free operation 42 Gasoline fueled models shall confined No Smoking area pits 43 No person shall attempt start engine fly model alone flying field So have itquite formidable list perhaps too long minimum degree safety average clubs flying site However have no doubt clubs other rules existence may have missed club drop us line think have missed something important club large say over 100 members May 1980 111 / OF LIGHT AND QUIK ITS FULL TIGER EATING GRINS!! AAmco Inc humbly say no more
Edition: Model Aviation - 1980/05
Page Numbers: 44, 45, 46, 111
WHETHER call Quarter Scale Mam moth Scale Monster Scale popular new breed big models just BIG big has mean heavy necessarily heavy relation size heavy terms actual pounds Fifteen 30 pounds roughly range ground gear has three five times load weve used rough landing forces really climb model industry already starting react situation offering beefed-up retract units larger sizes music wire However Monster models may have low wing power loadings wings stop supporting weight gear has take load three five times greater weve used Designed Curtiss Sparrowhawk Bobs gear will function 45 G landingE Bob Beckman 44 Model Aviation big birds compared three 10 pounds current sport pattem models quarter scalers often have lower wing power loadings helptheir performance air wings stop supporting weight landing gear has pull off hold-up job Just sitting Close rear view main gear mounting fuselage Note travel-restraint screw shock strut Dont worry 10 mounting screws will place before flies quarter-scale builders finding answers problems often lie scaling down full-size practice scaling up modeling methods can particularly true land ing gear accompanying photographs drawings illustrate point applied -scale Curtiss Sparrowhawk presently under construc tion fact considering F9C-2 subject felt landing gear question tackled first Another local monster man having some problems landing gear recently completed model main gear struts made l rod other wise followed common model practice rigid mounting depending flexing struts absorb landing shocks After first few flights gear beefed up adding some 3/16 music wire still just barely adequate view experience decided design build Sparrowhawk landing gear before going rest project Typical landing gear design early 30s involved rigid struts positioned axle free rotate about mounting fuselage shock strut attached close axle mounted nearly vertical possible Sparrowhawk axle strut perpendicular fuselage centerline rearward slanted drag strut hinged near bottom center fuselage upper end shock strut attached high fuselage side addi tion low-pressure tires used help cushion landing shocks Working Peter Westburg drawings F9C-2 one-quarter scale sketch landing gear system developed seemed scale-like operation gear feasible shock strut scaled out just over 5A thick axle drag struts YB would OWERPPER SIDE SEWS OF BRASS SPUCK STRUT FITTINDS 0 END VIEWTSP yEW GALE BLSCN D NUM P L AT E I/A PO BULEHEADS 12 I/N SPRINUPINSISALUMINUM MEANT NA RATE0 SPRING -7CLEARANCE HALES 7FER 1S32 SCREWS TRAVEL RESTRAINT SLAT PACE STRUT RAND FIBRE TUBINGAu FAIRINUS AND OPEN AIR AUTER l/D INNER I / FACE WHEEL PANTS ARE _______________-SUCUM FORMED PLAATC DRILED AND TAPPED R-3D FDR TRAVEL RESTRAINT SCREW VIEW THROUGH'CLEVIS PARTS DRILLED AND THROUSH TAPPED FDN FARWAIADSTNUTS0-32 SCREWS TYPICALI AU ESTR.TERAS STRUT BOTH 3/RALUMINUM ROD TRUE VIEW OFARLE AND SNAG STPUTASSEMRLF DRILED AND TAPPED FAN N-3D MACPINE SCREW NYLON WASRERS IN LANDING GEAR ASSEMBLY fBr / SCALE CURTIS FSC-2 SPARROWNAWE 7/fl May 1980 45 Tailwheel extraordinaire View shows entire assembly Steering cables will linked rudder control cables allow use ng inside ng shock strut ng rod positioning struts Thin plastic fairings would bring struts final scale size shape Du-Bro 6-in wheels scale size inflation pressure can varied get scale tire action Everything looked good construction main gear started first step design make blocks connect struts wheel axles together axles themselves turned brass rod integral wheel retainers no small set screws depended upon secure wheels piece c wire pressed through center axle strengthen axle blocks machined -thick aluminum plate axle drag struts /8 aluminum rod axle strut fits hole inboard end axle block hole drilled angle required properly position axle axle fits hole drilled through length axle block axle strut axle place axle strut locked axle block axle turn held block three 6-32 machine screws end drag strut cut proper angle secured 6-32 screw through axle block axle strut upper end axle strut slotted drilled form clevis fits 01 aluminum mounting plate fuselage Because angle drag strut its upper end fitted brass knuckle attaches strut another mounting plate strut-axle-wheel assemblies rotate freely about attachment points fuselage shock strut linking Outer end axle block point high fuselage side restrains motion axle assembly absorbs landing shock strut composed telescoping pieLes hard fibre tubing compression spring brass end fittings prototype strut made alumi num tubing final struts made hard fibre tube since about 20% lighter aluminum sizes involved strong enough end fittings machined brass secured tubing 1/16 spring pins compression springs designed use stripper plates knockouts etc large punch presses made wide variety sizes strenhsThe spring selected F9C-2 has load capacity 30 lb/in 1 inches shock strut travel leg must see 45 lb force before strut bottoms 20pound airplane means gear still func tioning up 45G landing Add shock absorbing action wheels gear should able handle unreasonably rough landings upward travel gear limited fully compressed length spring limit downward travel also required slot milled back side outer shock strut tube An 8-32 machine screw upper end inner tubing limits downward travel gear proper in-flight position main gear hand attention turned tailwheel Sparrowhawk Since plane capable carrier landings basic idea ofa positioning strut near vertical shock strut also applied tailwheel original plane primary dif ferences main gear single positioning strut shock spring mounted out side shock strut steerable wheel fork Again one-quarter-scale sketch showed feasibility scale-like operation inum plate rod used struts s tubing forms upper portion shock strut aluminum rod lower portion turned down slide inside tubing shock spring pinned strut end provides both upper lower travel limits An aluminum block similar main gear axle blocks connects two struts steerable wheel fork Steering will cables linked rudder control cables design construction Sparrowhawk landing gear first seemed like formidable task end turned out straightforward relatively simple lot machining required can done hobby type lathe/milling machines ma terials used readily available McMaster Carr Supply Co manufacturers supply house Chicago lists everything needed catalog got hard fibre tube #8654K21 OD #8654K26 OD compression springs Continued page 111 46 Model Aviation nut IU1U Ut Irufli UIU ruar riuurutiuuy PIdIU3 WIfl siruis SiiaCflOO Rear view left axle block assembly wheel removed Two set screws front back plus cap screw top hold axle securely place axle block Front view right axle block assembly wheel installed wheel hub installed around axle axle installed axle block thereby locking axle strut place Closeup rear mounting plate Brass knuckles drag struts allow angled strut rotate same axis forward axle strut assures free movement complex landing gear system THE TRIPLE THREAT Del N QUIKRAY-500 has eneered meet need model could built fast very strong meet requirements AMA Sport Pylon Events Quicky 500 Pylon Racing Fun Fly Events around Sport Flying Trainer general Pattern Flyinp baby strong Buil lightandfast baby will turn Pylon tighter ything youhaveseen will snap stall out. QUIKRAY-500 can built complete air Twelve Fifteen hours covered materials such SUPER MONOKOTE other covering same family U ANDUEJI AUCIAFT uRODIL CO INC 500 FAST IS WHAT SHE IS DOCILE Winpspan 50 inArea 503 sqin Engine 1945Weight 3/s lbs Material AU Balsa Ply needed I The AD engine used Goodyear shows lot promise available sufficient quantities has 12mm crankshaft should strong enough take rigors Control Line racing Al Kelly tells engine available will run about $135 anyone interested should contact him 2 The SWCLA Big Goodyear rules have modified slightly result meeting held Buckeye significance required pit stop shut-offs allowed used safety purposes other reason Contact Bob Reynolds Buckeye CD specifics 3 The K&B 58 very competitive limited capacity events Miller needed practice weekend sort out problems really get competitive Big GY way exact same situation last year ACLA Slow Rat 4 In limited capacity events normal emphasis competitors range expense speed appears practice get testing latest super fuel brew will get enough range almost seems afraid pit stops AMA events contrast require pit stops As consequence AMA competitors practice pitting great fervor bottom line good pitting lot better airspeed can make up decreased range would suggest ACLA SWCLA competitors practice pitting worry much about missing range OK know fast plane range still going win majority competitors Mostly slow long go fast pit better couple poems friends Buckeye First ACLA Slow Rat friends Roses red Violets blue Last year practice year got SWCLA Big Goodyearfriends Roses red Violets blue year Slow Rat Next year too W R Lee 3522 Tamarisk Lane Missouri City TX 77459 Hold- U p/Beckman continued page 46 main gear#9620K 12 aluminum blocks brass end fittings machine shop scraps 3/ aluminum rod available hard ware stores cheated tumed down 3/~ 4 brass tubing available hobby shop tail wheel shock spring came hardware store Although gear described designed specific airplanethe Curtiss F9C-2 Spar rowhawk ethe basic methods applicable subject reasonably large size youre restricted fixed-gear aircraft minds eye keep getting glimpses -scale Grumman F3F-3 wheels slowly pulling up fuselage sides SAFE FLYING IS NO ACCIDENT let conclude column Safety/Preston continued page 47 34 No usually 4 6 models permitted air once 35 There shall no flying before fter 6 There shall no flying during runway mowing operations 37 Fliers shall consume alcoholic beverages drugs flying field Other Rules necessarily related safety 38 Anything bring flying field shall removed depart 39 Pets shall confined spectator area 40 Members must display club identification pennant badge transmitter antenna jacket 41 No person shall attempt fly model out being accompanied instructor unless have reached minimum flight proficiency level following two rules have seen clubs field safety rules considerthemto significance accident free operation 42 Gasoline fueled models shall confined No Smoking area pits 43 No person shall attempt start engine fly model alone flying field So have itquite formidable list perhaps too long minimum degree safety average clubs flying site However have no doubt clubs other rules existence may have missed club drop us line think have missed something important club large say over 100 members May 1980 111 / OF LIGHT AND QUIK ITS FULL TIGER EATING GRINS!! AAmco Inc humbly say no more