NASA Kennedy Space Center’s Ground Systems Development and Operations Program engineers in Florida are combining heritage technology and new innovations to design the crew access arm for the tower on the mobile launcher that will be used for NASA’s Orion spacecraft atop the Space Launch System (SLS) rocket.

Orion will be the most advanced spacecraft ever designed and carry astronauts farther into space than ever before. SLS is designed to be flexible for launching spacecraft for crew and cargo missions and will enable new missions of exploration and expand human presence across the solar system. It will first launch Orion in 2017. The mobile launcher's new 60-foot-long hydraulic arm will be similar in length and speed to the arm used during the Apollo missions. It will have two levels and incorporate hardware from NASA’s Apollo and Space Shuttle Programs.

Located at about the 270 feet high on the 355-foot-tall tower, the upper level will include a new “White Room” that provides access to the Orion crew module. The White Room will contain a six-foot-long access platform that will extend through Orion’s outer door to the crew module door. Refurbished Apollo era control console and accumulators also will be part of the new arm.

The lower-level walkway will provide access to two panels on the spacecraft's service module. Design elements from the inflatable dock seal on the shuttle’s orbiter access arm will be reused, as well as storage cabinets and safety equipment from the shuttle-era White Room. The access arm will rotate out to the crew module on giant Apollo-era hinges. The hinges will be refurbished and retrofitted with new digital encoders to accurately obtain the arm’s position.

New 3D design visualization tools are being used to view the concept throughout the design process. During the process, heritage parts planned for reuse, such as Apollo-era control consoles, are scanned and then uploaded into a special 3-D design software program. Another innovation for the future is that the White Room can be removed and replaced on the upper level of the arm to accommodate access to larger, planned SLS cargo vehicles and future launch vehicles.

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