Piper PA-42 Cheyenne III / Cheyenne IV / Cheyenne 400LS
1980
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PA-42-100 Cheyenne 400LS

On 30 June 1980 Piper began production deliveries of a new version of the Cheyenne range of twin turboprop aircraft. Intended for use as a 6/11-seat corporate or commuter transport, this Cheyenne III differs considerably from its predecessors, a fact reflected in the changed company designation Piper PA-42. It has a wing of increased span, lengthened fuselage, a T-tail, and more powerful Pratt & Whitney Aircraft of Canada PT6A turboprop engines installed in lengthened nacelles. The Cheyenne III remains as a current production model, being complemented by the Cheyenne IIIA which differs primarily by having 634kW PT6A-61 turboprop engines flat-rated at 537kW and offering performance improvements. In addition to the Cheyenne III, Piper was involved in the certification programme of a new Cheyenne IV during 1983, with two 1,227kW Garrett TPE331-14A/14B counter-rotating turboprop engines, each of them flat-rated at 746kW. Deliveries of the Cheyenne IV began in the early summer of 1984. It was one of the fastest propeller light twins, at over 644km/h.

The Cheyenne is one of the very few Piper products to remain in volume production after the company's financial reorganisation in 1991/92. Current versions on offer include the Cheyenne IIIA of which 59 had been delivered by early 1993. Nine Cheyenne Ills delivered to the US Drug Enforcement Administration, fitted with AN/APG-66 radar and a ventral FLIR, are used for day- and nighttime surveillance missions. They are known as Customs High Endurance Tracker (CHET) aircraft. Cheyenne Ills are joined at the Lock Haven production line by the PA-42-1000 Cheyenne 400. Originally the Cheyenne IV, it later became the Cheyenne 400LS. Deliveries total 43.


Specification 
 MODELPA-42-Cheyenne III
 CREW6-11
 ENGINE2 x Pratt & Whitney Aircraft of Canada PT6A-41 turboprops, 537kW
 WEIGHTS
    Take-off weight5080 kg11200 lb
    Empty weight2898 kg6389 lb
 DIMENSIONS
    Wingspan14.53 m47 ft 8 in
    Length13.23 m43 ft 5 in
    Height4.5 m14 ft 9 in
    Wing area27.22 m2292.99 sq ft
 PERFORMANCE
    Max. speed549 km/h341 mph
    Ceiling9755 m32000 ft
    Range4150 km2579 miles

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