Booster Separation Motors (BSM)

Booster Separation Motors  

Northrop Grumman's Booster Separation Motors (BSMs) were rigorously qualified for manned space flight, successfully used on the last 15 space shuttle missions, and are a critical part of NASA’s next-generation Space Launch System (SLS). Four BSMs are installed in the forward frustum of each solid rocket booster, and four are installed in the aft skirt.

Designed to push the spent motors safely away from the core vehicle at staging, all 16 BSMs fire simultaneously at booster separation a little over two minutes into the mission, approximately 25 nautical miles above the earth’s surface. Travelling 3,000 miles per hour at ignition, each BSM provides about 20,000 pounds average thrust over its one-second burn, ensuring successful launch to orbit.

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