Elpis, Novus, Pandora i Aegis zostały latem 2016 dostarczone do Michoud Assembly Facility w Nowym Orleanie, gdzie są przygotowywane elementy rakiety SLS.
Each transporter is over 33 feet long and 12 feet wide and can carry 75 tons each, the equivalent to 14 fully-grown elephants. On each transporter, the 12 independent, electric wheel modules are powered by a propane-driven Chevy 350 cubic inch small block engine. The transporters can position the cargo to within 5 one-thousandths of an inch - that's less than the size of a grain of sand. In addition to being strong and very agile, each transporter is safe; they contain systems to monitor and control the forces imparted into the delicate hardware and a fire suppression system in the event of emergencies.
A key element of the transporters is the capacity to distribute the weight of the payloads equally to each of the 48 wheel modules. The empty core stage weighs approximately 94 tons and is over 200 feet long and more than 27 feet in diameter. That is the equivalent of a three-story tall building stretching from the goal line to the opposite 30-yard line on an American football field. The transporters work together wirelessly, forming what is known as a virtual strong-back, which keeps the large, precision built payload from bending or twisting during transportation.
http://www.nasa.gov/exploration/systems/sls/specialized-transporters-move-core-stage-of-SLS