Thursday, July 08, 2010

Last Shuttle External Tank Rollout

Commemorating 37 years of successful tank deliveries, NASA and Lockheed Martin Space Systems Company held a ceremony on Thursday, July 8, at the agency's Michoud Assembly Facility in New Orleans to rollout the final external tank for the last space shuttle flight.

The last external tank scheduled to fly on a shuttle mission was completed on June 25 by Lockheed Martin workers at Michoud. The tank, designated ET-138, will travel on a wheeled transporter one mile to the Michoud barge dock. ET-138 will then travel on a 900-mile sea journey to NASA's Kennedy Space Center in Florida, where it will support shuttle Endeavour's STS-134 launch.

The external tank, the "gas tank" for the orbiter, holds the propellants used by the space shuttle main engines. It also is the "backbone" of the shuttle during launch, providing structural support for attachment with the solid rocket boosters and orbiter. It is the only component of the space shuttle that is not reused.

The three main components of the external tank include the liquid oxygen tank, liquid hydrogen tank and the collar-like intertank, which connects the two propellant tanks. The intertank houses instrumentation and processing equipment and provides the attachment structure for the solid rocket boosters.