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NASA's Marshall Center Successfully Tests 48-inch Solid Rocket Motor A scaled-down version of the Space Shuttle's Reusable Solid Rocket Motor was successfully tested March 24 at NASA's Marshall Space Flight Center in Huntsville, Ala. The 28-second firing tested a 48-inch-diameter, modified NASA motor.Space Shuttle's solid rocket motors are periodically tested to ensure they can withstand environments similar to those generated by an actual motor during flight. For example, the motor's insulation materials must withstand chamber gas temperatures that reach 5,652 degrees Fahrenheit during a Shuttle launch.
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