Quote:
Originally Posted by BlackSix
We don't have official flight tests for Spits and Hurris between 0 and 3000m.
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Thanks, Black Six. At last we finally know why the Spitfire Ia's top speed at sea level is 240 mph. The slope of the curve was simply applied to the 0 - 3000 m gap in information, so 0 feet = 240 mph. Mystery solved.