Final reports on the 2012 Delta IV anomaly that generated low thrust in its RL-10B-2 upper-stage engine are expected in April, but the successful launch of a Delta IV with the GPS IIF-5 spacecraft Feb. 20 indicates fixes added to the launcher’s engine-processing procedures worked as planned. The big rocket carrying the navigation bird lifted off from Cape Canaveral at 8:59 p.m. EST, right on time after a five-month delay while the issues raised by the 2012 launch were addressed. The ...


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