Blade coning refers to what specific occurrence in rotor blades?

Blade coning refers specifically to the phenomenon where rotor blades exhibit an upward sweep due to the combined effects of lift and centrifugal force. As the helicopter hovers or flies, the lift generated by the rotor blades causes them to bend upward at the tips, forming a conical shape. This effect is a result of both the aerodynamic forces acting on the blades and the centrifugal forces that arise as they rotate around the rotor hub.

The upward sweep is significant because it affects the overall aerodynamics and performance of the rotor system. Understanding blade coning is crucial for pilots, as it influences factors like rotor efficiency, control response, and stability. The coning angle can be adjusted and compensated for through pilot input and rotor system design, ensuring safe and effective flight operations. This understanding of rotor blade dynamics is essential for maneuvering and operating the helicopter appropriately in various flight conditions.