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45:, resulting in a slight cone shape to the rotor disc. This is balanced by centrifugal force. If rotor RPM drops too low, the rotor blades fold up with no chance of recovery.
52:(twist) so that lift is relatively uniform along the blades. However, because lift increases quadratically with airspeed, coning still occurs at higher RPMs.
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are designed with "pre-coned" blades, which are curved downwards but lay more flat in flight.
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through the air than the parts of the blades near the hub, so they generate more
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This article is about the helicopter phenomenon. For the medical condition, see
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The ratio of aerodynamic forces to inertial forces is called the
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171:. US Department of the Army. May 2007. pp. 13, 42–43.
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Principles of
Helicopter Aerodynamics with CD Extra
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33:discs. The tips of the helicopter rotor blades
48:Helicopter rotors are typically designed with
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147:: CS1 maint: location missing publisher (
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104:. Federal Aviation Administration. 2012
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182:Leishman, Gordon J. (24 April 2006).
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76:Unequal rotor lift distribution
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98:Helicopter Flying Handbook
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127:. [S. l. pp. 2–17.
279:Helicopter aerodynamics
123:Croucher, Phil (2007).
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27:Coning
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