Allison Model 250
Engine family
The Allison Model 250, now known as the Rolls-Royce M250, is a highly successful turboshaft engine family, originally developed by the Allison Engine Company in the early 1960s. The Model 250 has been produced by Rolls-Royce since it acquired... Wikipedia
Developed into: Rolls-Royce RR500
Major applications: Bell 206; MD Helicopters MD 500; MBB Bo 105; Sikorsky S-76
Manufacturer: Allison Engine Company; Rolls-Royce plc
Number built: >30,000