2 were purchased (known by the designation YH-31) for U.S. Army evaluation and test. A third ship was subsequently built in Canada.  Resembling the LZ-4, the helicopter was equipped with an 8-cylinder supercharged engine.

 

The aircraft was capable of talking 6 passengers or 4 litters.

Overview

Data on design, manufacture and status

Design authority: Doman Helicopters Inc.

Primary manufacturer: Doman Helicopters Inc.

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 2

Crew seating: Side-by-side

Landing gear: Wheels (non-retractable)

Overall Dimensions

Data on aircraft size

Overall Width: 14.63 m (48.0 ft)

Engine Details

Aircraft powerplant (lift and/or propulsion)

Total number of engines: 1

Engine designation: Lycoming 580-D reciprocating

Engine manufacturer: Lycoming Engines

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 2359 kg (5200 lb)

Max Range: 394 km (213 nm)

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Related Public Resources

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