powered by Lycoming IMO-360 piston engine; two built RP-77B Proposed version of RP-77 with turbo-supercharged McCulloch engine, none built. RP-77C Proposed version of RP-77A with turbo-supercharged Lycoming SO-360M engine, none built. RP-77D Production prototype with Boeing 502 turboprop; twenty built for evaluation. RP-86 Proposed reconnaissance version of RP-77D; none built. Specifications (RP-77D) See also References Notes Bibliography International Aeronautic Federation, 1961. Interavia. Jane's Information Group. Jane, Fred T., et al. (1958) Jane's All The World's Aircraft. London: S. Low, Marston & Company. Merrill, Arthur M, 1956. Plastics Technology, Volume 2. Royal Aeronautical Society, 1959. The Aeronautical Journal, Volume 63. RP-77 1950s United States special-purpose aircraft Single-engined tractor aircraft High-wing aircraft Target drones of the United States Single-engined turboprop aircraft Cancelled military aircraft projects of the United States Aircraft first flown in 1958