Prototype for what would be developed into a series of tandem helicopters including the CH-46 series. Only 1 prototype was built.
Source: AHS History Calendar 2016 | August 2016, Ken Bartie, AHS web page, Last accessed Nov 8, 2018
VTOL type: Helicopter
Lift devices: 2 in Tandem (Fore/aft) configuration
Crew required: 2 in Side-by-side arrangement
Landing gear: Wheels (non-retractable)