Ultra-light helicopter

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A/W 95 SPECIFICATIONS
Min. speed: 0 mph/kph (hover)	Cruise speed: 60 mph (97 kph)
Empty weight: 272 lbs* (123 kilos)	Useful load: 225 lbs** (102 kilos)
Gross weight: 497 lbs** (222 kilos)	Main rotor diameter: 19.5' (5.94 m)
Main rotor chord: 7" (17.78 cm)	Tail rotor diameter: 3'4" (102 cm)
Length: 15' (4.57 m)	Height: 6'5" (196 cm)
Width: 5.75' (175 cm)	Engine: Rotax 503 (or equiv.)**[/td]
Horsepower range: 50 - 75**	Engine RPM: 6200 - 6500[/td]
Main rotor RPM: 435 - 450	Tail rotor RPM: 2800
Flight time (5 gal fuel): 1 hour±	Max altitude: about 10,500 ft
* May qualify as an ultralight if empty weight is trimmed to 254 lbs ** Load & gross weight can be increased with larger engine

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What are the actual costs involved for building the A/W 95?
The final cost to build the A/W 95 depends on your sources of supply, particularly for the engine.  If you find inexpensive sources or even surplus materials, you can build the A/W 95 (less engine) for as little as two or three thousand dollars. An average cost—also less engine—might be around $3,500. Obviously the cost will be much higher if you pay to have parts made or purchase pre-fabricated parts and components. However, a well-constructed A/W 95 will typically have a high re-sale value—if you ever decide to sell it!

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Version
Performance
Torque
Max RPM

               

kW
HP
RPM
Nm
ft. lb.
RPM
RPM

503 UL-DCDI
Single Carb
34.0
45.6
6500
51
37.6
5900
6800

               
503 UL-DCDI
Dual Carb
37.0
49.6
6500
56
41.3
6000
6800


Rotax 503 engine, 503 Rotax engine specifications and technical data:


DESCRIPTION: Two-cycle, two-cylinder engine, oil in fuel lubrication  
BORE: 72.0mm (2.835 in.)  
STROKE: 61mm (2.40 in.)
DIRECTION OF ROTATION: Counter- clockwise, viewed towards PTO (without reduction gear box)  
DISPLACEMENT: 496.7 c.c. (30.31 cu. in.)  
COMPRESSION RATIO: Theoretical 10.8 - effective 6.2  
POWER OUTPUT: 34.0 kw (46 hp) configuration single carb.  
MAXIMUM RPM: 6800 rpm.
DIRECTION OF ROTATION: Counter- clockwise, viewed towards PTO (without reduction gear box)  
CYLINDER: 2 light alloy cylinders with cast iron sleeves  
PISTON: Aluminum cast piston with 2 rings
PISTON/CYLINDER CLEARANCE: 0.07 - 0.08mm (.0028 - .0032 in.)  
IGNITION SYSTEM: Breakerless Ducati capacitor discharge dual ignition with magneto generator.  
GENERATOR OUTPUT: 170 W AC at 6000 rpm and 13.5 V RMS  
RECTIFIER- REGULATOR: (optional) a.) #9103 requires min. load 12 W (1 amp) to regulate
b.) #9251 requires no min. load
IGNITION TIMING: 1.47mm = .059 in. (16 degrees B.T.D.C.)
SPARK PLUG: 14 mm NGK B8ES
ELECTRODE GAP: .015 in.
CARBURETOR: 1 x BING 36mm (1.42 in.) hand lever choke
FUEL PUMP: pneumatic fuel pump #6903 for single carb
FUEL: Regular or premium gasoline, octane not lower than 90 octane (unleaded fuels)  
LUBRICATION OF ENGINE: Super 2- stroke oil (AV-2), proposed ASTM/CEC  
STARTER: Rewind starter - standard
(optional) electric starter, magneto side without rewind starter
REDUCTION GEARBOX "B":
(optional) Reduction gear box with torsional shock absorber, for propeller interia up to 3000 kg cm sq.  
REDUCTION GEAR BOX "C":
(optional) Reduction gear box with torsional shock absorber, for propeller interia up to 6000 kg cm sq.
RATIOS: 2.62 to 1, 3.00 to 1, 3.47 to 1, 4.00 to 1.  
LUBRICATION OF GEAR BOX: Gear oil, GL5 or GL6, SAE 140EP, or 85 W-140 EP  
DIRECTION OF PROP SHAFT ROTATION: Clockwise, viewed towards propeller flange.  
COOLING: Air cooled by axial fan
WEIGHT: Engine wo/: carburetor, air filter, fuel pump, exhaust system...................................................67.0 lbs.......(30.4 kg )  
2 carbs w/ sockets...................................4.0 lbs........(1.8 kg )
exhaust system assy...............................10.8 lbs........(4.9 kg )
2 air filter.................................................0.6 lbs........(0.3 kg )
electric start kit, mag end.1.......................7.7 lbs........(3.5 kg)
start kit, mag end.1...................................7.7 lbs........(3.5 kg )
Reduction box "B"....................................9.9 lbs........(4.5 kg )
Reduction box "C"..................................16.3 lbs........(8.1 kg )
OPTIONS:

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一架價格跟遙控噴射直昇機差不多.老美很幸福.