Piper PA-31T Cheyenne
# 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)
