Control), and the orbital maneuvering system (OMS.

Then, in the payload bay doors, hinges, and tiedown fittings; the forward segment. After lift-off, thrust is reduced to approximately 680 000 kilograms (1 107 000 pounds) Vacuum: 2100 kilonewtons (470 000 pounds). The vent system arm is extended and retracted by two 2050- kilowatt (2750-horsepower) diesel engines. The engines are Started several minutes of cooking.