Construction completed for stand to test SLS’s largest fuel tank

The 215-foot-tall structural test stand for NASA's Space Launch System is seen Sunday, Sept. 24, 2017, at NASA's Marshall Space Flight Center in Huntsville, Alabama.

NASA will test the Space Launch System (SLS) liquid hydrogen tank to ensure it is ready for the extreme forces of launch and ascent.

The SLS liquid hydrogen and liquid oxygen tanks will feed 733,000 gallons of super-cooled propellant to four engines, producing 2 million pounds of thrust at the base of the core stage.