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The Flight Envelope of a Helicopter
Published online by Cambridge University Press: 28 July 2016
Extract
The only simple method of estimating the tip speed limitations imposed on a rotor by retreating blade stall on the one hand, and compressibility losses on the other, is that given by Hafner. It suffers from the lack of accuracy always inherent in a “standard radius” method, and for present-day use a more refined approach is obviously desirable, provided that it still enables rapid estimates to be made.
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- Copyright © Royal Aeronautical Society 1954
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