Developed from the Bell D-250, this was one of the three competing aircraft that underwent flight evaluation in the U.S. Army/Navy Light Observation Helicopter (LOH) competition. The aircraft was originally designated YHO-4-BF before it was changed in 1962.
VTOL type: Helicopter
Lift configuration: Single main rotor
Dedicated control device: Tail rotor
Crew required: 1
Crew seating: Side-by-side
Landing gear: Skids
Total number of engines: 1