One of the industry's most popular 300-450shp turboprop engines
The M250 Series II turboprop engines are of two-shaft modular design featuring 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.
Developed from the famous Model 250 turboshaft, the first 317shp Model 250-B15 turboprop has spawned a family of highly successful derivatives, culminating in today's 450shp M250-B17F.
The M250 turboprop has found popularity due to its small size and high power-to-weight ratio, which make it ideal for turbine conversions of existing piston-engined designs. 1,200 M250 turboprops have now been produced, accumulating over 5 million flight hours.
The M250 turboprop variants enjoys the same world-class global support as the turboshaft family, and benefits from a continuous improvement culture which has seen the M250 remain at the forefront of small gas turbine engine design.
The latest generation M250-B17F turboprop is derived from the Model 250-C20R+ turboshaft, and develops 450shp. The M250 turboprop has truly never been so popular, with no less than 20 current applications, including the B-N Group Defender, O&N Cessna P210 and Tradewind Bonanza.
Recent applications include the Extra EA-500 all-composite, six-seat turboprop; the Fuji T-7 primary trainer; the sleek Grob G140TP, which combines sparkling performance with excellent economy; the Schweizer RU-38B reconnaissance craft; and the Enaer T-35 Turbo Pillan, which continues to set FAI-accredited world records in its class.
|Design speeds@100% rpm
Power output shaft
Gas producer rotor
Power turbine rotor
*Technical data (ISA SLS)
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