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Which way does the propeller turn on a helicopter?

The propeller on a helicopter is called a rotor, and it turns counterclockwise when viewed from above. This is because of the way that the helicopter's engine is designed. The engine drives a shaft that turns the rotor, and the rotor blades are angled in such a way that they create lift when they rotate. The lift force created by the rotor blades is what keeps the helicopter in the air.

If the propeller turned the other way, it would create a force that would push the helicopter down instead of up. This would cause the helicopter to crash.

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