title: Piper PA-31T Cheyenne
text: # Piper PA-31T Cheyenne
  
  The Piper PA-31T Cheyenne is a turboprop development of the earlier PA-31P Pressurized Navajo.
  
  ## Development
  
  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.
  
  ## Operators
  
  ### Military operators
  
  **Mauritania**
  
  * Mauritanian Air Force
  
  **United States**
  
  * United States Department of Defense.
  
  ## Variants
  
  ### PA-31T Cheyenne
  
      Initial production version, powered by two 620-shp (462-kW) Pratt & Whitney Canada PT6A-28 turboprop engines.
  
  ### PA-31T-1
  
      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.
  
  ## Specifications
  
  Data from Jane's All the World's Aircraft 1976–77
  
  General characteristics
  
  * Crew: 2
  * Capacity: 4–6 passengers
  * Length: 34 ft 8 in (10.57 m)
  * Wingspan: 42 ft 8+1⁄4 in (13.011 m) (over tip tanks)
  * Height: 12 ft 9 in (3.89 m)
  * Wing area: 229 sq ft (21.3 $m^2)$
  * Airfoil: NACA $63_2-415$ at root, 63A212 at tip
  * Empty weight: 4,870 lb (2,209 kg)
  * Max takeoff weight: 9,000 lb (4,082 kg)
  * Fuel capacity: 382 US gal (318 imp gal; 1,450 L) usable fuel
  * Powerplant: 2 × Pratt & Whitney Canada PT6A-28 turboprops, 620 shp (460 kW) each
  * Propellers: 3-bladed Hartzell HC-BTN-3B constant-speed propellers, 7 ft 9 in (2.36 m) diameter
  
  Performance
  
  * Maximum speed: 326 mph (525 km/h, 283 kn) at 11,000 ft (3,400 m)
  * Cruise speed: 244 mph (393 km/h, 212 kn) at 25,000 ft (7,600 m) (econ. cruise)
  * Stall speed: 88 mph (142 km/h, 76 kn) (flaps down)
  * Range: 1,702 mi (2,739 km, 1,479 nmi) (econ. cruise, 45 min reserves)
  * Service ceiling: 29,000 ft (8,800 m)
  * Rate of climb: 2,800 ft/min (14 m/s)
  * Takeoff run to 50 ft (15 m): 1,980 ft (600 m)
  * Landing run from 50 ft (15 m): 1,860 ft (570 m)
  