Allison Model 250
| Model 250 / T63 | |
|---|---|
| MTU-built Allison 250-C20B | |
| Type | Turboshaft/Turboprop |
| National origin | United States |
| Manufacturer | |
| Major applications | |
| Number built | >30,000 |
| Developed into | Rolls-Royce RR500 |
| Variants | Rolls-Royce RR300 |
The Allison Model 250 (now known as the Rolls-Royce M250 and designated T63/T703 in US military service) 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.