Scale IN THE LAST column got aero dynamics scratch-build next Stand-off Scale bird have chosen powerplant good 60 choose airfoil will use say 2414 case next consideration size wing Its usually best start wing determine size wing area needed Im what would call heavy builder like beef up scale models stand rigors contest flying lot midHelicopters PRECAUTION prevent crashes heli copter Insurance Most crashes result two thingsmechanical failure human error will concern ourselves mechanical failure article Ball-Links machines incorporate lot hall-links links per form very vital functions failure usually results disaster fail common failure improper installation screwed onto threaded rod end rod should never go threads drilled hole rod screwed further will rupture ball-link possibly wont know until fails beBud Atkinson western flying sites grass cow pasture fly ing fields average build around 9-10 lbs 660 700 sq wing area best weight Eor very light model may go low 600 sq scale models get little squirrelly below 600 sq usually dont fly too scale-like Most popular kits today 600 700 sq category Again biplane exception usually having higher wing area 700 760 sq So turn past building experience heavy Walt Schoonard ginning threaded rod should smoothed off file sandpaper thread smooth point especially tru have cut off threads Dreme disc dykes sharp end threads literally cuts ball-link will fracture Another failure ball-link splitting along mold seams caused inserting too large threaded rod heat fuel fumes attack nylon Schluter ball-link use collar made blue nyrod Cut /4-in length blue nyrod slide over hex end ball-link will never fail next failure ball-links just plain wear out should checked fre light can build scale model Re member too foam wings usually about 1015% heavier built-up wings ways well worth Now come problem thats little sticky Aileron size WW II singleengine fighter types true scale ailerons rather small models able roll properly cases leave span aileron scale increase chord say 3/16 movable area devia ting appearance scale know exceptions use discretion Its easy cut down throw ailerons problem make effective continued page 66 quently looseness ball come off easily should replaced After crash hard landing could have strained overloaded should checkedcontinued page 73 February 1976 15 Left Two years making Fred Hulens T-28 Fiberglass fuse re tracts dive brakes drop tank Above Bob Underwoods Russian Stormovik WW-I took Nats second Stand-off Scale Above Helicopter stand described article made plywood stable holds copter Left Loyde Wheelers Heli-Baby training struts seems almost poised antenna hovers Below Night flying local shopping center Walt claims floats best possible training gear could use Pitts Special Only time will tell either way frontiers will have pushed forward satisfied way things men convinced must better way Editors Note Aug 4 1975 Dick Rutan established new world record VariEze Class CIa eclipsed old record non-stop closed-circuit flight covering 1628 statute miles An attempt class record distance straight line expected made early 1976 R C Helicopters/Schoonard continued page 15 Lock-Tite Lock Nuts Lock Washers helicopters have levels vibration al ways will present vibrations will loosen tightest nuts bolts unless some strong precautions taken Lock-Tite should used nuts bolts unless some other locking device used recommend blue Lock Tite holds well enough yet can broken loose removed needed can pur chased auto cycle parts house several types lock nuts used machines Some crimped type shape nut has distorted creates bind threads type lock nut resistant vibration good will repeatedly removed can damage threads fiber lock nuts very good need replacing no longer able create bind threads Lock washers designed dig both surfaces contact As vibration tries back out screw sharp edges lock washer dig prevent bolt nut turning lock washer useless side facing fiat washer will dig fiat washer flat washer being held friction will hold Fuel Lines Fuel Fittings Filters people fail take precautions items failures very common Fuel lines adhere fuel fittings quite well new dry just let little age some very slippery fuel get involved whole thing becomes disaster fuel lines installed cut off length tubing about long open up needle-nose pliers slide fuel tubing about all fuel tubing usual manner slide ring over fitting middle fitting tremendous amount pressure now being applied ring will prevent tubing coming off using pressure system fuel fittings should checked sharp edges burrs sharp edges can will cut best fuel tubing made Sand off sharp edges clean Out fittings make sure no filings good fuel filter should installed between tank carburetor Test filter make sure does leak type can opened cleaned test leaks after cleaning leaking fuel filter can cause problems can imagine fueling helicopter fuel through filter will strain fuel tank alright dirt will promptly go carburetor Lastly use good fuel prefer K & B 500 want know write will tell Helicopter Floats Floats far best training landing gear can use dont mean acrobatic flying hovering what should doing still learn ing will slide easily pavement grass will withstand tremendous abuse hard landings have seen helicopters drop 30 feet floats saved helicopter floats raise center gravity too high simply bend cross supports fuse lage hung down between floats Install can maintain proper longitudinal CG hate say German-made floats far superior made country come attaching parts very little Low-Fuel-Warning Devices Unless have X-ray eyes can see fuel level flight have digital clock mind recommend low-fuel-warning device several market end article will give address Most warn ing devices use lamps flash cease flash fuel level has reached low three systems article will Wiensch system Walther system Kavan system Wiensch system has very low battery drain can used check airborne battery condition system runs off radio battery draws 8 ma per lamp can operate up three lamps parallel sells $1995 Walther system operates separate 48-volt source will drive up three lamps has very good feature long fuel tank keeps flashing fuel goes low will stop flashing incorporates its own safety system wire break bulb blow out unit itself fail warning land check out sells $1500 Kavan Electronic-Fuel Control operates separate power supply blinks fuel goes low will drive least two bulbs parallel sells $1800 prefer Walther system because has its own safety blinking time have using unit over two years have gotten used am very uncomforta ble fly helicopter Some people say cannot see daytime true some distance radio control helicopters takes just few seconds fly can see about 50 feet no problem Helicopter Stands have never liked standing head start work helicopter have stand shown picture made 3/s-in thick plywood stands 21 inches high built outer legs farther apart bottom 20 17 top very stable holds helicopter may put Heli-Baby have sheet plywood put top two feet square can finish polyurethane varnish cover Formica Mine finished semi-gloss Formica black makes mar-proof surface held together four -in wing nuts stud bolts go contest take apart first thing gets packed would like build like have plans will send free anyone sends repro ducible picture helicopter preferably flight sure include details about helicopter would like see have stand need pictures put column Fuel Warning Device Addresses Ron Wiensch 7318 Cosner Dr Dayton Ohio 45424 Edward Walther 3462 Bowman Dr Winter Park Fla 32789 Kavan Model Products 1424 E Borchard Ave Santa Ana Calif 92705 address 2080 Sharon Rd. Winter Park Fla 32789 February 1976 73
Edition: Model Aviation - 1976/02
Page Numbers: 15, 73
Edition: Model Aviation - 1976/02
Page Numbers: 15, 73
Scale IN THE LAST column got aero dynamics scratch-build next Stand-off Scale bird have chosen powerplant good 60 choose airfoil will use say 2414 case next consideration size wing Its usually best start wing determine size wing area needed Im what would call heavy builder like beef up scale models stand rigors contest flying lot midHelicopters PRECAUTION prevent crashes heli copter Insurance Most crashes result two thingsmechanical failure human error will concern ourselves mechanical failure article Ball-Links machines incorporate lot hall-links links per form very vital functions failure usually results disaster fail common failure improper installation screwed onto threaded rod end rod should never go threads drilled hole rod screwed further will rupture ball-link possibly wont know until fails beBud Atkinson western flying sites grass cow pasture fly ing fields average build around 9-10 lbs 660 700 sq wing area best weight Eor very light model may go low 600 sq scale models get little squirrelly below 600 sq usually dont fly too scale-like Most popular kits today 600 700 sq category Again biplane exception usually having higher wing area 700 760 sq So turn past building experience heavy Walt Schoonard ginning threaded rod should smoothed off file sandpaper thread smooth point especially tru have cut off threads Dreme disc dykes sharp end threads literally cuts ball-link will fracture Another failure ball-link splitting along mold seams caused inserting too large threaded rod heat fuel fumes attack nylon Schluter ball-link use collar made blue nyrod Cut /4-in length blue nyrod slide over hex end ball-link will never fail next failure ball-links just plain wear out should checked fre light can build scale model Re member too foam wings usually about 1015% heavier built-up wings ways well worth Now come problem thats little sticky Aileron size WW II singleengine fighter types true scale ailerons rather small models able roll properly cases leave span aileron scale increase chord say 3/16 movable area devia ting appearance scale know exceptions use discretion Its easy cut down throw ailerons problem make effective continued page 66 quently looseness ball come off easily should replaced After crash hard landing could have strained overloaded should checkedcontinued page 73 February 1976 15 Left Two years making Fred Hulens T-28 Fiberglass fuse re tracts dive brakes drop tank Above Bob Underwoods Russian Stormovik WW-I took Nats second Stand-off Scale Above Helicopter stand described article made plywood stable holds copter Left Loyde Wheelers Heli-Baby training struts seems almost poised antenna hovers Below Night flying local shopping center Walt claims floats best possible training gear could use Pitts Special Only time will tell either way frontiers will have pushed forward satisfied way things men convinced must better way Editors Note Aug 4 1975 Dick Rutan established new world record VariEze Class CIa eclipsed old record non-stop closed-circuit flight covering 1628 statute miles An attempt class record distance straight line expected made early 1976 R C Helicopters/Schoonard continued page 15 Lock-Tite Lock Nuts Lock Washers helicopters have levels vibration al ways will present vibrations will loosen tightest nuts bolts unless some strong precautions taken Lock-Tite should used nuts bolts unless some other locking device used recommend blue Lock Tite holds well enough yet can broken loose removed needed can pur chased auto cycle parts house several types lock nuts used machines Some crimped type shape nut has distorted creates bind threads type lock nut resistant vibration good will repeatedly removed can damage threads fiber lock nuts very good need replacing no longer able create bind threads Lock washers designed dig both surfaces contact As vibration tries back out screw sharp edges lock washer dig prevent bolt nut turning lock washer useless side facing fiat washer will dig fiat washer flat washer being held friction will hold Fuel Lines Fuel Fittings Filters people fail take precautions items failures very common Fuel lines adhere fuel fittings quite well new dry just let little age some very slippery fuel get involved whole thing becomes disaster fuel lines installed cut off length tubing about long open up needle-nose pliers slide fuel tubing about all fuel tubing usual manner slide ring over fitting middle fitting tremendous amount pressure now being applied ring will prevent tubing coming off using pressure system fuel fittings should checked sharp edges burrs sharp edges can will cut best fuel tubing made Sand off sharp edges clean Out fittings make sure no filings good fuel filter should installed between tank carburetor Test filter make sure does leak type can opened cleaned test leaks after cleaning leaking fuel filter can cause problems can imagine fueling helicopter fuel through filter will strain fuel tank alright dirt will promptly go carburetor Lastly use good fuel prefer K & B 500 want know write will tell Helicopter Floats Floats far best training landing gear can use dont mean acrobatic flying hovering what should doing still learn ing will slide easily pavement grass will withstand tremendous abuse hard landings have seen helicopters drop 30 feet floats saved helicopter floats raise center gravity too high simply bend cross supports fuse lage hung down between floats Install can maintain proper longitudinal CG hate say German-made floats far superior made country come attaching parts very little Low-Fuel-Warning Devices Unless have X-ray eyes can see fuel level flight have digital clock mind recommend low-fuel-warning device several market end article will give address Most warn ing devices use lamps flash cease flash fuel level has reached low three systems article will Wiensch system Walther system Kavan system Wiensch system has very low battery drain can used check airborne battery condition system runs off radio battery draws 8 ma per lamp can operate up three lamps parallel sells $1995 Walther system operates separate 48-volt source will drive up three lamps has very good feature long fuel tank keeps flashing fuel goes low will stop flashing incorporates its own safety system wire break bulb blow out unit itself fail warning land check out sells $1500 Kavan Electronic-Fuel Control operates separate power supply blinks fuel goes low will drive least two bulbs parallel sells $1800 prefer Walther system because has its own safety blinking time have using unit over two years have gotten used am very uncomforta ble fly helicopter Some people say cannot see daytime true some distance radio control helicopters takes just few seconds fly can see about 50 feet no problem Helicopter Stands have never liked standing head start work helicopter have stand shown picture made 3/s-in thick plywood stands 21 inches high built outer legs farther apart bottom 20 17 top very stable holds helicopter may put Heli-Baby have sheet plywood put top two feet square can finish polyurethane varnish cover Formica Mine finished semi-gloss Formica black makes mar-proof surface held together four -in wing nuts stud bolts go contest take apart first thing gets packed would like build like have plans will send free anyone sends repro ducible picture helicopter preferably flight sure include details about helicopter would like see have stand need pictures put column Fuel Warning Device Addresses Ron Wiensch 7318 Cosner Dr Dayton Ohio 45424 Edward Walther 3462 Bowman Dr Winter Park Fla 32789 Kavan Model Products 1424 E Borchard Ave Santa Ana Calif 92705 address 2080 Sharon Rd. Winter Park Fla 32789 February 1976 73
