FLAP ANGLE MEASUREMENT SYSTEM AND METHOD

摘要

The invention relates to a system for monitoring movements of the rotor blades attached by flapping hinges (7) to a central head (4) or hub of a helicopter. The invention is achieved by that at least one sensor (9) is arranged to continuously measure the vertical angular movement (α) of a rotor blade and/or the flapping hinge (7).The invention also includes a method for monitoring the same movements.