Patent ID: 6439512
Filing Date: 2002-08-27
Classification: B64C

Abstract:
A horizontal stabilizer trim control surface position control system for use by a pilot on an aircraft, comprising:(a) a trim controller for controlling the angular position of the horizontal stabilizer trim control surface on command by the pilot, said trim controller powered substantially by pressurized hydraulic fluid, said trim controller including a plurality of spool-and-sleeve hydraulic valves, each of said spool-and-sleeve hydraulic valves having a plurality of inlet and outlet ports for flowing pressurized hydraulic fluid; (b) a trim actuator operatively coupled between said trim controller and the horizontal stabilizer trim control surface for adjusting the angular position of the horizontal stabilizer trim control surface on command by the pilot, said trim actuator driven by said trim controller; and (c) means for providing feedback on the angular position of the horizontal stabilizer trim control surface to the pilot.