Radiator of R-5: 3-4 sec to lower it (that is OK, I think) but less than 1 sec to lift up. Not too fast? It was operated manually, if I'm not mistaken.
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Q: Mr. Rall, what was the best tactic against the P-47?
A: Against the P-47? Shoot him down!
(Gunther Rall's lecture. June 2003, Finland)
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