A propeller is a mechanical device that uses rotating blades to generate thrust by pushing a fluid (air or water) backward. It consists of a central hub with multiple blades attached at an angle, and when rotated, these blades create a pressure differential that propels the device forward.
A dog clutch is a type of mechanical clutch that uses interlocking teeth or "dogs" to connect two rotating shafts, preventing slippage and ensuring they rotate at the same speed. Unlike friction clutches, which rely on friction to transmit torque, dog clutches use positive engagement.
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