Definition: In the context of mechanical engineering and aerodynamics, a screw propeller is an auxiliary propulsion system used in aircraft or other rotary-winged vehicles. It consists of two rotating blades that are connected to a central shaft. The blades rotate at high speeds, allowing the propeller to generate thrust and lift air above it. The term "screw propeller" refers to this type of device as it is often associated with a screw-driven motor or generator used in aircraft engines for propulsive purposes. It
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