Piper PA-31T Cheyenne
|PA-31T Cheyenne at Chino California, October 2013|
|First flight||29 August 1969|
|Developed from||Piper PA-31 Navajo|
|Variants||Piper PA-42 Cheyenne|
Originally, the aircraft was an upgraded version of the Pressurized Navajo equipped with two Pratt & Whitney Canada PT6A-28 turboprop engines. Later, the aircraft was further refined and developed, including aerodynamic improvements and fuselage extensions. The PA-31T led to the development of the PA-42 Cheyenne III and IV.
- Mauritania : Mauritanian Air Force.
- United States : United States Department of Defense.
- PA-31T Cheyenne
- Initial production version, powered by two 620-shp (462-kW) Pratt & Whitney Canada PT6A-28 turboprop engines.
- Original designation of the PT-31T Cheyenne I. Powered by 500-shp (373-kW) Pratt & Whitney Canada PT6A-II turboprop engines.
- PA-31T Cheyenne II
- Improved version, renamed version of original powered by two 620-shp (462-kW) Pratt & Whitney Canada PT6A-28 turboprop engines.
- PA-31T2 Cheyenne IIXL
- Stretched version, powered by two 750-shp (559-kW) Pratt & Whitney Canada PT6A-135 turboprop engines.
Data from Jane's all The World's Aircraft 1976–77 
- Crew: 2
- Capacity: 4–6 passengers
- Length: 34 ft 8 in (10.57 m)
- Wingspan: 42 ft 8¼ in (13.01 m)
- Height: 12 ft 9 in (3.89 m)
- Wing area: 229 sq ft (21.3 m²)
- Empty weight: 4,870 lb (2,209 kg)
- Max. takeoff weight: 9,000 lb (4,082 kg)
- Powerplant: 2 × Pratt & Whitney Canada PT6-28 turboprop, 620 shp (462 kW) each
- Maximum speed: 326 mph (525 km/h, 283 knots) at 11,000 ft (3,360 m)
- Cruise speed: 244 mph (393 km/h, 212 knots) at 25,000 ft (7,600 m)
- Stall speed: 88 mph (142 km/h, 77 knots) (flaps down)
- Range: 1,702 mi (2,739 km, 1,478 nmi) (econ cruise, 45 min reserves)
- Service ceiling: 29,000 ft (8,840 m)
- Rate of climb: 2,800 ft/min (14.2 m/s)
- Related development
- Aircraft of comparable role, configuration and era
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