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Might be a simple answer that I am overlooking but...

I am attempting to determine the torque of a helicopter main rotor so that I can design an anti-torque rotor to counteract it. Anyone aware of of a simplified formula for this? I have been unable to find such a thing.

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  • $\begingroup$ Some more info here $\endgroup$
    – Koyovis
    Jul 12, 2021 at 22:37

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Power is torque times angular velocity. Hence, torque = power/angular velocity

For example, for a power of 200 hp and angular velocity 400 RPMs, using SI units –> 200 hp = 149000 W 400 RPMs = 41.9 rad/s

Torque = 149000/41.9 = 3556 newton-meter.

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