MEMBER ALERT: AOPA will be closed for President's Day, Monday, Feb. 15and will reopen at 8:30 a.m. EST, Tuesday, Feb. 16.
October 28, 2013
Question: In terms of reciprocating engines, what is a compression ratio?
Answer: The compression ratio of an engine is the ratio of the volume of space in a cylinder when the piston is at the top of the stroke compared with when it is at the bottom of the stroke. A higher compression ratio generally means higher engine efficiency.
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