NASA building a better solid rocket booster for space launch system rocket

Oct 03, 2012 by Bill Hubscher
ATK employees at the company's Promontory, Utah facility prepare a segment of a qualification motor for NASA's Space Launch System for transport. Credit: ATK

(Phys.org)—The largest and most powerful solid rocket booster ever built for flight is being assembled for NASA's Space Launch System at ATK Space Systems in Brigham City, Utah, incorporating new cost-savings measures. The SLS will launch NASA's Orion spacecraft and other payloads beyond low Earth orbit, and provide an entirely new capability for human exploration.

Although similar to the solid rocket boosters that helped power the to orbit, the five-segment SLS boosters include several upgrades and improvements implemented by NASA and ATK engineers. In addition, the SLS boosters will be built more affordably and efficiently than shuttle boosters, incorporating new and innovative processes and technologies.

"America's next steps in deep exploration build on the lessons learned from our nation's rich human spaceflight history. By using the best-of-the-best from shuttle and improving on previous investments, we will produce the needed solid booster for the first SLS flights," said Dan Dumbacher, NASA's deputy associate administrator for Exploration Systems Development at NASA's headquarters in Washington, D.C. "We are encouraged by the progress being made at ATK. Their commitment to deliver a safe and high-quality rocket booster is vital as we build SLS to enable exploration to new frontiers in the solar system."

New process improvements have been implemented throughout the manufacturing of Qualification Motor-1, the next full-scale test article for SLS booster. Four case segments have now been cast, and the motor will begin assembly in the test stand next month in preparation for a ground test in the spring of 2013.

The forward segment of the qualification motor for NASA'S Space Launch System is transported through manufacturing and assembly at ATK's facility in Promontory, Utah in preparation for a full-scale ground test there next spring. Credit: ATK

Implementing new handling processes, ATK estimates the total assembly time for the SLS booster can be reduced by approximately 46 percent overall. In one area, ATK optimized inspection methods and replaced x-ray inspections with an ultrasonic examination of the booster's nozzle, allowing technicians to evaluate the hardware on the production floor. In another, ATK reduced the number of moves from 47 to seven during one phase of booster assembly, reducing the chance of any damage in transit and greatly reducing the time it takes to complete that production process.

"By improving upon proven Space Shuttle solid rocket motor hardware and operations, our shared goal is to deliver a safe, affordable and sustainable launch vehicle," said Alex Priskos, SLS booster manager at NASA's Marshall Space Flight Center in Huntsville, Ala. "We are embracing innovation both technically and in our management processes as we design and build SLS. Through the use of new streamlined approaches and techniques we have been able to drive down costs and enhance the reliability of the hardware."

The booster team has successfully completed its Booster Requirements Review confirming the five-segment solid rocket motor had a well-understood set of requirements. The review, held at NASA's Marshall Space Flight Center, included independent consultants and determined the team is ready to proceed to a Preliminary Design Review in 2013.

Watch a video about the SLS Booster Value Stream Mapping:

The initial 70-metric-ton (77 ton) configuration of the SLS will provide 10 percent more thrust than the Saturn V rocket at liftoff. The rocket's first stage will be powered by four RS-25 former space shuttle main engines flanked by two five-segment boosters. The SLS solid will generate a combined 7.2 million pounds of thrust to help power the massive rocket off the launch pad.

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SteveL
not rated yet Oct 03, 2012
Good to see these guys are still in business, they used to be Morton Thiokol. They got smacked around pretty roughly after the Challenger disaster. They pretty much got saddled with the blame, even though their Engineers warned NASA repeatedly against launching in sub-freezing temperatures. Back in 1983 I got a really nice job offer from them, but I didn't want to stay in the rocket/missile business.
Lurker2358
not rated yet Oct 03, 2012
So basically this is as slightly better Saturn V rocket with two additional boosters?

KISS seems to be the theme, and for good reason. The shuttle makes no sense; never did.
SteveL
2 / 5 (1) Oct 03, 2012
The shuttle got us where we are now. It may not have been the best solution, but it worked.