Patent ID: 8622336

Claim:
Stabilizer for rotorcraft which carry one hanging sling load on at least one supporting cable: comprising: at least one sling load pendulum motion detecting unit (S 2 ) for detecting pendulum motion of the sling load; and a working range determination unit (S 3 ) to determine a free working range in which the rotorcraft with sling load can move without collision, and wherein the stabilizer generates the control signals (R) in dependency of a detected pendulum motion of the sling load and in dependency of a determined working range, and wherein the sling load pendulum motion detecting unit (S 2 ) for detects the pendulum motion of the sling load in a lateral and a longitudinal direction in relation to a longitudinal axis of the rotorcraft wherein the stabilizer generates control signals (R) which are applied or modulated onto flight control signals of the rotorcraft for damping pendulum motion of the sling load.