IO-320-B1A engines and modified wing leading edges PA-39 Turbo Twin Comanche C/R Turbocharged version of the PA-39 Twin Comanche C/R Piper PA-40 Arapaho Developed and fully certified version of PA-39 with entirely different wing and extensive fuselage modifications. Three prototypes only. Specifications (PA-39) See also References Notes Bibliography The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985), 1985, Orbis Publishing External links Twin Comanche 1960s United States civil utility aircraft Low-wing aircraft Aircraft first flown in 1962 Twin piston-engined tractor aircraft