History Based on the PA-31 Cheyenne I and II series, the Cheyenne III was referred to as the PA 42-720. It is powered by two 720 shp PT6A-41 engines. The III-series cabin is longer than the I and II series. Externally, the III is different from the I and II series because of a tall T-Tail. The Cheyenne III typically seats six or seven and has an aft lavatory. Summary NAME: Cheyenne III MANUFACTURER: Piper Type: Turboprops RANGE: 997 nm SPEED: 286 kts PASSENGERS: 6 people ACQUISITION COST: $718,575 ENGINES: Pratt & Whitney Canada PT6A-41 2 AVIONICS: WINGSPAN: 47.7 ft IFR CERTIFIED: Yes