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by vannucci
2111 days ago
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When the engine on top of a helicopter spins the blades, they exert an equal torque force back on the body of the helicopter. In order to just spin the blades and keep the body straight, you have to cancel that torque by using a tail rotor which creates a force way back on the tail that with the length of the tail, cancels it out. In the case of this helicopter, the force to spin the blades comes from the tips of the blades, expelling gas out the tips will push the blade tips forward, so the body doesn't push on the rotor blades at all to spin them. |
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