What is the term for the upward force acting on a helicopter created by the rotor blades?

The upward force acting on a helicopter, generated by the rotor blades, is referred to as lift. Lift occurs due to the aerodynamic design of the rotor blades, which creates a difference in air pressure above and below the blades as they rotate. This pressure difference results from the angle of attack and the speed of the rotor blades, allowing the helicopter to rise into the air.

In aviation, lift counteracts the weight of the helicopter and is essential for taking off, hovering, and maintaining flight. Understanding the principle of lift is fundamental in aviation dynamics, as it explains how rotary-wing aircraft like helicopters are able to navigate effectively through the air.

This concept is crucial because it emphasizes the importance of rotor blade design and rotor dynamics in helicopter operation, ensuring that pilots can achieve and maintain flight safely and efficiently.