Talk:Nakajima Mamoru

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Military history: Aviation / Asian / Japanese

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Valves.

It appears that I'm not the only one who has doubts about this engine employing 4 valves per cylinder (unless that question mark was placed there by the person who wrote that section, because they weren't sure and made a guess at it). Every other radial engine I can think of is a 2-valve engine, for the same reason that almost all pushrod engines are 2-valve. It's almost impossible to make a workable system to actuate 4 valves with pushrods and rocker arms. — Preceding unsigned comment added by .45Colt (talk • contribs) 15:33, 11 February 2014 (UTC)[reply]