The Allison 250-C28 (US military designations T63 and T703) is now produced by Rolls-Royce and known as the M250. Over 30,000 M250s have been produced. They are used in a wide range of fixed wing aircraft, helicopters and even a motorcycle (the MTT Turbine Superbike). From Vertiflite, November/December 1976 (page 45).
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