The Boeing Company

Timothy J Soderquist

Christopher D Feet

Barry D Hance

Derek M Joseph

Kevin B Eck

Yonas T Meshesha

Lior Ungar

A vehicle control surface, such as an aircraft horizontal stabilizer, is hydraulically controlled using solenoid operated valves (SOVs) controlling directional control valves and/or rate control valves with small numbers of ports, e.g. a four port three position directional control value and/or a four port two position rate control valve.

Horizontal stabilizer trim actuator systems and methods

A system for monitoring actuation of a flight control surface, the flight control surface being connected to a track that moves the flight control surface between at least a retracted position and an extended position, the system including a rack connected to the track, a pinion engaged with the rack and a rotation detector operatively connected to the pinion.

Aircraft flight control surface actuation monitoring system and method

Systems and methods are provided for a hydraulic stabilizer trim actuator (HSTA). The HSTA may operate one or more movable control surfaces. The HSTA operate responsive to commands issued by the pilot and/or by a controller and may include hydraulic architecture that minimizes the probability of an un-commanded movement or movement in the opposite direction of such commands.

Growing community of inventors

Marysville, WA, United States of America

Timothy J Soderquist