Pratt & Whitney JT12

The Pratt & Whitney JT12 ( military designation Pratt & Whitney J60 ) is a single-shaft turbojet engine of the U.S. manufacturer Pratt & Whitney.

The engine comprises a 9 -stage axial compressor, an annular burning chamber with eight header pipes, and is driven by a 2-stage axial flow turbine.

The design work began in July 1957. Already in May 1958, the first prototype was put to the test. The first test engines were delivered in July 1959. The achieved takeoff thrust was 12.9 kN, the MTBO first 50 h The first, finished in October 1960 series engines had a thrust of 13.3 kN already, which was later increased to 14.6 kN. The MTBO had since been increased to 3000 h. Until 1969 2032 units were delivered.

It was the North American T -2B Buckeye, the equipped among other North American T - 39A Sabreliner, and Lockheed L- 1329 Jetstar with these engines.

A further development to a turboshaft engine is the Pratt & Whitney JFTD12 dar.

Specifications (JT -12A -8)

  • Compressor stages: 9
  • Turbine stages: 2
  • Waves: 1
  • Diameter: 556 mm
  • Length: 1930 mm
  • Weight: 212 kg
  • Thrust: 14.6 kN
  • Compression: 6,4:1
  • Turbine inlet temperature: 1145 ° K
  • Maximum speed: 16200 min-1
Time between overhaul North American T-2 Buckeye North American Sabreliner Allison J33 Westinghouse J34 Allison J35 De Havilland Goblin Westinghouse J40 Rolls-Royce Nene General Electric J47 Rolls-Royce Avon Wright J65 Allison J71 General Electric J73 General Electric J79 Rolls-Royce Soar
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