Space Shuttle Reaction Control Systems and Gas Generators

Since the initial space shuttle launch in 1981, Aerojet Rocketdyne’s Orbital Maneuvering System (OMS) engines, Reaction Control System thrusters, and gas generators supporting the Auxilary Power Unit, have supported every mission. The two OMS engines were used to place the shuttle into orbit and return it to Earth. The 38 primary and six Vernier RCS thrusters were used for attitude control during flight operations such as payload insertions and docking with the International Space Station.