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The Pratt & Whitney Canada PT6 is a turboprop aircraft engine produced by Pratt & Whitney Canada.Its design was started in 1958, it first ran in February 1960, first flew on 30 May 1961, entered service in 1964, and has been continuously updated since.
Model 90 with TOGW increased to 9300lb, two 550shp PT6A-20 engines, redesigned flightdeck and a new engine de-ice system, 206 built. [49] Model 65-A90-1 Based on the Model 87, unpressurised with square windows and 550shp PT6A-20 engines, 141 built and delivered to the US Army with the designation U-21A. [49] Model 65-A90-2
Ameriflight Beech 99 freighter on approach to Las Vegas Beech 99s of Britt Airways operating under contract to Allegheny Commuter at Chicago O'Hare in 1975. 99 Airliner: Twin-engined Commuter and cargo transport aircraft, 10,400 lb max takeoff weight, accommodation for a crew of two and up to 15 passengers. powered by two 550-hp (410-kW) Pratt & Whitney Canada PT6A-20 turboprop engines.
Pratt & Whitney Canada PT6 The Pratt & Whitney Canada PT6T Twin-Pac is a turboshaft engine designed for helicopters. Manufactured by Pratt & Whitney Canada , its first application was in the Bell 212 and UH-1N Twin Huey helicopter family.
The availability of the 550 shaft horsepower (410 kW) Pratt & Whitney Canada PT6A-20 turboprop in the early 1960s made the concept of a twin feasible. A DHC-3 Otter with its piston engine replaced with two PT6A-4 [3] engines had already flown in 1963. It had been extensively modified for STOL research. [4]
The 715 shp TPE331-6 used in the Beech King Air B100 have a 400-hr. fuel nozzle cleaning interval, 1,800-hr. hot section inspection interval and a 5,400-hr. time between overhaul; approval is possible for 3,000-hr. HSIs and 6,000-hr. overhauls and engine reserves are cheaper than for the PT6A. [9]
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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 ...