The Helicopter Speed Limit

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https://www.youtube.com/watch?v=f72WZwvMTj4
Published on November 25, 2016 by Tex Hollywood

There’s a hard speed limit for helicopters. Like, a speed that helicopters physically can’t exceed. Above about 400km/h, helicopter blades literally run out of lift and the bird falls out of the sky. It’s due to a phenomenon called dissymmetry of lift, and this video explains exactly how it works.

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