Coning

Coning
Upturned blade due to combined lift and centrifugal force.
Coning Angle ...

Coning This effect is the bending of the rotor or propeller blades when stressed.
Control Surface Any one of the various moveable portions of the wings, tail surfaces, or canard.

Coning. The upward angular displacement of the rotor blades of a gyroplane or helicopter under the influence of lift. The Coning Angle is the angle between the rotor blades and the plane normal to the axis of the hub.

Notice the coning of the rotor blades in this final picture. They make a distinct "V" shape because there is no longer sufficient RPM to hold them down straight.
Return to Hovering Autorotation description ...

Battle of Britain Memorial Flight, RAF Coningsby, Lincolnshire
Brooklands Museum, Weybridge, Surrey
City of Norwich Aviation Museum. Norwich International Airport, Norfolk
de Havilland Aircraft Heritage Centre, London Colney, Hertfordshire ...

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Amount of coning depends on RPM, gross weight, and G-Forces experienced during flight. If RPM is held constant, coning increases as gross weight and G-force increase.

See also: Helicopter, Rotor, Pitch, Aircraft, Pilot