Developed in 1946 and designated Whirlaway by the U.S. Navy. The two-engined aircraft had a transmission that would drive both rotors from one engine if there was a failure in the other.
VTOL type: Helicopter
Lift devices: 2 in Tandem (Lateral) configuration
Crew required: 1-2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)