Engine reliability is judged here by maintenance hours, flying hours, and the trouble experienced in service. The Pegasus is praised using the Wellington, Swordfish, Sunderland, and Hampden as examples, with roughly 32,000 engines said to have been built. Its 1932 service entry gave operators years to identify problems before the Second World War. The Taurus supplies a contrasting case of early trouble followed by improvements. This exchange distinguishes a mature engine's record from the reputation acquired during difficult development, though it provides no comparative maintenance table.
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Bristol engine reliability and years of service experience
The Pegasus and Taurus illustrate how early problems, production experience, and time in service affect an engine's reputation.