Pratt & Whitney Canada PW150

The PW150 is the highest-power member of the Pratt & Whitney Canada PW100 family of three-shaft turboprops. It was introduced on 24 April 1995 when Bombardier selected it for the launch of the de Havilland Dash 8-400 regional turboprop. Compared with the rest of the family it replaces the single-stage centrifugal low-pressure compressor with a three-stage axial one and has improved turbine cooling, which raised the rating from 2,750 shaft horsepower on the PW127 to 4,920, although the engine is thermodynamically capable of 6,500 to 7,500. Variants include the PW150B proposed for the Shaanxi Y-8F-600, the PW150C proposed for the Xian MA700, and the ST40 adapted for the Bombardier JetTrain. The manufacturer quotes a PW150A dispatch availability above 99.96 percent and a maximum propeller speed of 1,020 rpm.