Stall speed: 88 mph (142 km/h, 77 knots) (flaps down).Powerplant: 2 × Pratt & Whitney Canada PT6-28 turboprop, 620 shp (462 kW) each.The PA31T Cheyenne II has also been used by the Mauritanian Air Force and the United States Department of Defense. Most aircraft are used in North America, and some airlines/operators have updated to the PA-42 Cheyenne III and IV, although there are examples used by operators in Europe and Asia. Piper introduced the lower powered (373kW/500shp PT6A-11s) and less expensive Cheyenne I in 1978, and renamed the original Cheyenne the Cheyenne II. Certification had been granted on May 3 1972, while the first production aircraft, powered by Pratt and Whitney 462kW/620shp PT6A-28s with three bladed, constant speed, fully feathering Hartzell propellors, first flew on October 22 1973. Production deliveries were further delayed due to flooding at Piper’s Lock Haven plant in June 1972. The prototype of the Cheyenne flew for the first time on August 29 1969, but Piper had to redesign the flight controls to handle the increased loads on the airframe due to the higher speeds. Although the first Cheyenne was not delivered until mid 1974, work on a turboprop version of the Pressurised Navajo, from which it is derived, dates back almost a decade earlier to the mid 1960s. Information from, rocket route and Wikipedia states that the Piper Cheyenne family of turboprop corporate aircraft is based on the popular Navajo and Chieftain piston twins.
Carenado Piper PA-31T Cheyenne Introduction
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