A rotor blade might be referred to as a propeller blade, a rotor wing, a rotatable wing, or a spinning airfoil. It might also be called a rotor sail, a helicopter rotor, or a gyroplane wing. In the context of wind turbines, it can be referred to as a wind blade or a windmill blade, whereas in the case of marine propulsion systems, it can be called a propeller blade. Additionally, it can be named a fan blade, an impeller blade, or a compressor blade in various mechanical devices, depending on the function it serves. Regardless of its designation, the rotor blade is an essential component of various machines that require rotational power.