Going back to the Bristol Hercules. It was a rugged and reliable engine.
BWIA (island hopping in Caribbean-lots of heat humidity and sea blast) had them on their Vickers Vikings in the early fifties.
Before that, they had Lodestars with Pratts. The Vikings were followed by DC-3s with Pratts.
During the Viking era they won the coveted
Cumberbatch Trophy for "regularity"
, a feat they never came close to before or after, even with jets, in their 66 year history!
Those Hercules just kept on humming even in relatively primitive conditions.