Originally Posted by
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Now I want to know exactly how a sleeve valve engine works, other than not very well.
Bristol Hercules sleeve-valve engines worked very well for SAFE Air in New Zealand over more than three decades. They were getting more than 2,000 hours between overhauls out of their's fitted to the Bristol B170 Freighters, which was considerably more than what NAC were getting out of their P&W R-1830 Twin Wasps in the DC-3s. And those Bristol Hercules engines in SAFE's Freighters used to get thrashed on short haul flights backwards and fowards every day across Cook Strait between Wellington and Blenheim. Heaps of startups and shutdowns and accompanying full-power takeoffs every day.