Definition
A 'screw propeller' is a type of mechanical device with rotating blades that generates thrust to propel a vehicle through a fluid, such as water or air. It's essentially a rotating wing that pushes against the surrounding medium. Think of it as a corkscrew that pulls a boat or plane forward. Unlike oars or paddles, it provides continuous thrust through rotation. It's a key component in ships, airplanes, and some specialized vehicles. 🚢 It's like a powered fan for locomotion. ✈️