Rotor Drives encompass the mechanical and electromechanical assemblies that transmit and regulate torque from a prime mover to rotary systems such as helicopter main and tail rotors, covering components including rotor masts, swashplate mechanisms, freewheeling units, and rotor brake assemblies, together with associated MGB (main gearbox) interfaces, spline couplings, and HUMS-compatible drive-train monitoring provisions.
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