SLS Rollout

    Credit: Greg Scott


 17 March 2022

Greg Scott
Written by Greg Scott

At 5:47pm EDT on Thursday March 17th the 322 foot tall SLS (Space Launch System) left the VAB on its 4.2 mile journey to NASA’s Pad 39B. The 10 hour trip, reaching speeds of 0.8 mph, ended with the rollup to the pad and was lowered onto pedestals on the pad at 4:15am EST on Friday.

The trip was accomplished on one of two of NASA’s crawler-transporters, Crawler 2, originally built in 1965. In 2016 NASA finished its upgrades on CT-2 for use with the Artemis program. This will be the first time a crawler has transported a launch vehicle to the launch pad since STS-135 back in July 2011.

SLS is the Artemis program’s crew launch vehicle which hopes to return American astronauts to the surface of the moon in the next few years. The first Artemis test flight will be a proof of concept of the vehicle as well as the Orion crew capsule designed to make the voyage to the surface of the moon. The Artemis 2 flight, planned for sometime in 2024, will carry astronauts on a trip around the moon and possibly more dependent on progress of the systems. The rocket itself is the most powerful every built by NASA exceeding even the Saturn 5 rocket that previously delivered men to the moon from December 1968 through December 1972.

SLS’s rollout to the pad is in preparation for the WDR, wet dress rehearsal, in early-mid April when the launch team attempts to simulate a full run through for flight. The rocket will be returned to the VAB in May to finish the evaluation of the rocket and systems as well as more tests ahead of a planned launch sometime as early as June.


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