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.
Design authority: Doman Helicopters Inc.
Primary manufacturer: Doman Helicopters Inc.
Parent type: No type defined
Aircraft status: No longer flying
VTOL type: Helicopter
Lift devices: 1 Single main rotor
Dedicated control device: 1 Tail rotor
Crew required: 2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)