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.
Allison Model 250, yang sekarang dikenal sebagai Rolls-Royce M250, (US sebutan militer T63 dan T703) adalah keluarga mesin turboshaft sangat sukses, awalnya dikembangkan oleh Allison Engine Company di awal 1960-an.