Patent ID: 6796535
Filing Date: 2004-09-28
Classification: B64D,Y02T

Abstract:
A flap operating system for operating left and right flaps mounted on left and right main wings synchronously with each other, comprising:left and right hydraulic actuators for driving the left and right flaps, respectively, left and right pulleys connected to and rotated by said left and right hydraulic actuators, and first and second synchronizing cables for connecting said left and right pulleys in an X-shape to each other to synchronize the rotations of said left and right pulleys, said system further including: left and right rotational angle sensors for detecting rotational angles of said left and right pulleys, respectively, and control means for calculating a difference between the rotational angles detected by said left and right rotational angle sensors and to stop the operations of said hydraulic actuators when said difference exceeds a predetermined threshold value.