Aeroderivative Gas Turbine M250-Turboshaft
Originally developed as the T63 to meet a US Army requirement for a 250 shp turboshaft, the Series I M250 has spawned an entire family of small turbine engines. A program of continuous development has resulted in today's range of Series II and Series IV engines, which power many of the world's most popular helicopters. The recently introduced Value Improvement Package (VIP) kit gives Series IV operators a post-production option to improve performance by five percent. A FADEC upgrade program will also deliver improved capability and reliability.
Two-shaft modular design featuring a two-stage LP turbine, two-stage HP turbine, and a gearbox with 6,000rpm output.
Compressed air is routed to the aft end of the engine for combustion, with exhaust gases exiting from the middle of the engine.
The Series II features four to six-stage axial and single-stage centrifugal compressors with a hydro mechanical fuel control system.
The larger Series IV family is identical in layout except for having a single-stage centrifugal rather than an axial/centrifugal compressor.
The latest Series IV turboshafts also feature a FADEC (Full Authority Digital Engine Control) system.
- Power (kW)186.4
- power (hp)250
- Turbine Stages (HP/LP)2/2