Doman LZ-1A

General Data
First Flown:	1950	Length:	10.34 m
Lift Capability:		Height:	3.35 m
Range:	640 km	Rotor Span:	12.2 m
Top Speed:	136 km/h	Empty Weight:	871 kg
Service Ceiling:		Max Gross Weight:	1350 kg
Engines:	1 Franklin 0-405-9 arated at 245 hp
Armament:	n/a
Accommodations:	1 pilot, 1 passenger	Cargo:
Operators:

Similar Aircraft:	Sikorsky R-6
Other Features:


Notes
This helicopter was a modified Sikorsky R-6. The major difference was a special experimental rotor hub/blade design by Gilden Doman.
The rotors were a little longer, did not have flapping hings, drag hinges or hinge dampers. Despite these changes and the addition of two blades the performance was unaffected.
This design also incorporated the speed reduction gearing as a part of the rotor assembly. This keeps all the moving parts in a common housing.

Jeff's Helicopter Philes