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ATK, ULA Successfully Test GEM-60 Motor

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ATK [ATK] and the United Launch Alliance yesterday conducted a successful cold-temperature ground test of a Graphite Epoxy Motor (GEM-60) solid rocket motor used to boost ULA’s Delta IV launch vehicles, according to an ATK statement. The 60-inch diameter, 53-feet long motor, which was chilled to a core temperature of 30-degrees Fahrenheit, performed as designed by producing approximately 270,000 pounds of thrust while burning for 90 seconds. The test was the second in a series to qualify new fixed and…

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