with raised wing, engines moved to wing leading edge and retractable wing floats. Two 900 hp (671 kW) R-1830-64 engines. Operators United States Navy Specifications (XP3D-2) See also References Notes Bibliography Creed, Roscoe. PBY: The Catalina Flying Boat. Shrewsbury, UK:Airlife Publishing, 1986. . Francillon, René J. McDonnell Douglas Aircraft since 1920. London:Putnam, 1979. . Swanborough, Gordon and Peter M. Bowers. United States Navy Aircraft since 1911. London:Putnam, 1976. . Wagner, Ray, American Combat Planes, Doubleday & Company, Garden City, New York, 1982, External links 1000Aircraftphotos California Secret. Time, March 25, 1935. Flying boats 1930s United States patrol aircraft High-wing aircraft P3D Aircraft first flown in 1935 Twin piston-engined tractor aircraft