Allison Model 250
| Model 250 / T63 | |
|---|---|
| MTU-built Allison 250-C20B | |
| Type | Turboshaft/Turboprop |
| National origin | United States |
| Manufacturer | Allison Engine Company Rolls-Royce plc |
| Major applications | Bell 206 Britten-Norman BN-2T Turbine Islander MD Helicopters MD 500 MBB Bo 105 Sikorsky S-76 |
| Number built | >30,000 |
| Variants | Rolls-Royce RR300 |
| Developed into | Rolls-Royce RR500 |
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The Allison Model 250, now known as the Rolls-Royce M250, (US military designations T63 and T703) 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 Allison in 1995.