Solid rocket motor cold temperature trials
A successful cold-temperature ground test of a Graphite Epoxy Motor (GEM-60) solid rocket motor used to boost ULA Delta IV launch vehicles, has been conducted by ATK and United Launch Alliance.
The main test objectives from today's static motor firing were measuring the rocket motor's performance at cold temperatures, qualifying a new vectorable nozzle on the motor and verifying the performance of new nozzle insulation at the lowest range of operational temperatures. Additionally, the test provides qualification for transitioning nozzle manufacturing operations from an outside supplier to ATK.
"This motor firing is an important test for ATK, as we have expanded the use of our in-house capabilities." said Scott Lehr, vice president and general manager, ATK Aerospace Group, Defense & Commercial Division. "By manufacturing the nozzles ourselves, we are able to provide a better value for our customers."
The 60in motor is a low-cost propulsion system comprised of a composite case. The successful test is an important milestone in the GEM-60 vectorable nozzle qualification. Initial test data indicate that the 60in diameter and 53ft long motor, which was chilled to a 30F core temperature, performed as designed, producing approximately 270,000 lbs of thrust and burned for 90 seconds.
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