Experimental conversion of a standard Kellett KD-IB Autgiro into a convertiplane, for the U.S. Navy. Chief external changes are addition of wings and two wing-mounied engines. Was due to fly in 1955.
Engine: 1 x 275 hp Jacobs and 2 x 140 hp Lycoming
Rotor diameter: 40 ft
Rotors: 3-blade main; 3 propellers
Length (blades folded): 25 ft 11 in
Loaded weight: 3,400 lb