Helicopter skeleton tail shake reducing method, involves determining angle variation of vertical stabilizer generating tail shake opposition force, from tail shake measurement, and applying variation to control system of stabilizer angle

摘要

The method involves measuring tail shakes created on the skeleton (17) of a helicopter (2), using three sensors (18-20). An angle variation of a vertical stabilizer (9) susceptible to generate tail shake opposition force is determined from the measurement. The stabilizer is placed at a tail part of a fuselage (3). The angle variation is applied to a control system (10) of vertical stabilizer angle to eliminate the tail shakes. An independent claim is also included for a device for reducing tail shakes created on the skeleton of a helicopter, by streamline flow across a main rotor and streamline flow across the fuselage.