Technical data

The Model 250 turboprop family of engines are of two-shaft modular design, with power ratings ranging from 420-450shp.

The Model 250 Series II turboprop engines feature four- to six-stage axial and single-stage centrifugal compressors, a two-stage LP turbine, two-stage HP turbine with a hydromechanical fuel control system, and a gearbox with 2,800rpm output. Compressed air is routed to the aft end of the engine for combustion, with exhaust gases exiting upward from the middle of the engine.