Pratt & Whitney Canada PT6T-6 Turboshaft Engine

Object Details

Physical Description: Type: Turboshaft; Power Rating: 1,398 kw (1,875 shp) at 6,600 rpm; Compressor: 3-stage axial and 1-stage centrifugal; Combustor: Reverse-flow annular; Turbine: Single-stage axial high pressure turbine and single-stage axial power turbine; Weight: 3,522 kg (7,765 lb); Mounted inside part of a plane cutaway
Summary: Pratt & Whitney Canada began development of small gas turbines in the mid-1950s. Experience was first gained with the JT12 turbojet, produced by P&WA in the United States for aircraft such as the North American Sabreliner. In the late-1950s, following a survey of small aircraft manufacturers, P&WC decided to produce the PT6 free turbine engine, for both turboshaft and turboprop applications.; Initial commercial success was in the turboprop powered, fixed-wing Beech King Air, which first flew in February 1964. In 1967, foreseeing that multiple-turboshaft helicopter installations promised increased power and flight safety, P&WC began design of an engine consisting of two PT6 power sections coupled to a single gearbox. The PT6T-3 TwinPac became operational in 1970, first flying in the Bell 212 and UH-1N Twin Huey helicopter family.; This uprated TwinPac is installed in the nose cowling of a re-engined Sikorsky S-58T helicopter, and provided an extended operational envelope and improved payload capability over the original piston-powered version.

Credit Line: Gift of United Technologies Corporation, Sikorsky Aicraft Division

Circa 1974

Materials: Non-Magnetic White Metals; Fiberglass; Ferrous Alloy; Rubber Coated Fabric; Rubber; Plastic; Paint
Dimensions: 3-D: 182.2 × 236.2 × 193cm (5 ft. 11 3/4 in. × 7 ft. 9 in. × 6 ft. 4 in.)

National Air and Space Museum

GUID (Link to Original Record): http://n2t.net/ark:/65665/nv98bee642a-2487-4d46-9953-28d56cab4de8