Space Shuttle Projects, Marshall Space Flight Center
Space Shuttle orbiter Atlantis takes flight on its STS-27 mission, December 2, 1988, utilizing 375,000 pounds of thrust produced by its three main engines. The engines start in 3.9 seconds of ignition and go to static pump speeds of approximately 35,000 revolutions per minute during that time. The Marshall Space Flight Center had management responsibility of Space Shuttle propulsion elements, including the Main Engines. The STS-27 mission, the third mission dedicated to the Department of Defense (DOD), was crewed by five astronauts: Robert L. Gibson, commander; Guy S. Gardner, pilot; and mission specialists Richard M. Mullane, Jerry L. Ross, and William M. Shepherd.
The Space Shuttle program was the United States government's manned launch vehicle program from 1981 to 2011, administered by NASA and officially beginning in 1972. The Space Shuttle system—composed of an orbiter launched with two reusable solid rocket boosters and a disposable external fuel tank— carried up to eight astronauts and up to 50,000 lb (23,000 kg) of payload into low Earth orbit (LEO). When its mission was complete, the orbiter would re-enter the Earth's atmosphere and lands as a glider. Although the concept had been explored since the late 1960s, the program formally commenced in 1972 and was the focus of NASA's manned operations after the final Apollo and Skylab flights in the mid-1970s. It started with the launch of the first shuttle Columbia on April 12, 1981, on STS-1. and finished with its last mission, STS-135 flown by Atlantis, in July 2011.