Quote:
Originally Posted by hegykc
Yes. On the P-51 the radiator, because of the hot air going out of it, didn't cause any drag at all, instead it even produced some thrust.
Saw that in a documentary.
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Quite correct. This is known as 'The Meredith Effect' and the Spitfire was one of the first aircraft designed to incorporate a radiator housing designed to produce this effect.