Settle down, Doggles, and learn how to read a chart for once. The Spitfire Ia chart provided by Black Six only STARTS at 3000 meters of altitude -- he himself admitted they did not have data for lower altitudes. Yet you start blathering how this same chart shows the Ia at 300 mph at sea level.
When you can demonstrate that you know what you're talking about perhaps then you can make a valid point.
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