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Tail Rotor Power
The tail rotor power can be analyzed with the same approximations used for the main rotor. The tail rotor thrust required to balance the main rotor thrust is:
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where the subscript, M, applies to the main rotor and lT is the tail rotor moment arm with respect to the main rotor shaft. The tail rotor is not used to overcome drag, so its equation has no parasite power term as the main rotor does. To a first approximation, the tail rotor power in forward flight is:
where the subscript, T, indicates that all physical parameters are those of the tail ‘ rotor.
