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 devices: 1 Single main rotor
Dedicated control device: 1 Tail rotor
Crew required: 1 in Side-by-side arrangement
Landing gear: Skids