Originally Posted by
Dave Gittins
The answer depends on how you add up the various sub sets of each type. Is Cessna172 just one ? or is it 172 S, 172 R and so on. And is the O-360 one type or is it injected or normally aspirated, different horse ratings etc as two or more..
Could maybe make a claim for the Dart if you allow 4 per Viscount and 2 per 748.
All in all I'd be inclined to the O-360 (assuming it's only one engine) when looking on here
Lycoming O-360 - Wikipedia
Thinking of the Dart obviously the Viscount, Herald, F27, Andover, HS748, Gulfstream 1, DC3 (Conroy and Basler conversions) and the NAMC YS11. Quite a few types, actually more than I had originally thought. Other British built engines used on fewer types would be the Avon (Caravelle and Comet), Conway (707-400 and VC10), Spey (BAC1-11, F28, Trident) and Tyne (Vanguard, CL44, and Transall). The Dart is perhaps the most widely fitted British engine in terms of types it was applied to.