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RotaryWing Aircraft

RotaryWing Aircraft THAT the rotaplane rotor is essentially a windmill has hitherto been regarded as selfevident. It will be shown in the following analysis that, when the profile drag is sufficiently small, only part of the rotor is in the windmill brake state. This part receives more torque from the air than can be expended in profile drag and therefore the rotaplane rotor at zero torque must be partly an airscrew in the vortex ring state. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb030607
Publisher site
See Article on Publisher Site

Abstract

THAT the rotaplane rotor is essentially a windmill has hitherto been regarded as selfevident. It will be shown in the following analysis that, when the profile drag is sufficiently small, only part of the rotor is in the windmill brake state. This part receives more torque from the air than can be expended in profile drag and therefore the rotaplane rotor at zero torque must be partly an airscrew in the vortex ring state.

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Feb 1, 1940

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