Thrust Vector ControlGimbal Mountby Various (Moog, Parker, Curtiss-Wright, engine manufacturers)
Typical Specifications
Gimbal Range
u00b15u00b0 to u00b18u00b0
Slew Rate
5u201320u00b0/second
Actuator Force
10u2013100 kN
Operating Principle
A spherical bearing or flexure mount allows the engine to rotate ±5° to ±8° on two orthogonal axes. Actuators push/pull the engine to the commanded angle while flexible propellant ducts and electrical harnesses accommodate the motion.
The gimbal system enables a rocket engine to be pivoted on two axes for thrust vector control, steering the vehicle during powered flight. The engine is mounted on a gimbal bearing that allows angular movement while containing high-pressure propellant flow. Hydraulic, electromechanical, or pneumatic actuators pivot the engine based on guidance system commands.
Materials
Used In Engines
Common Failure Modes
Actuator failure, gimbal bearing seizure, flexible duct fatigue, control system malfunction, hydraulic leak
Recent Innovations
Electromechanical actuators replacing hydraulic (SpaceX), flexure-based gimbals, autonomous health monitoring, rapid slew rates for landing
