ANOTHER TRY: The U.S. Air Force is planning to use the RL10B-2 engine for a late February flight of the fifth Wideband Global Satcom satellite on a Delta IV rocket, according to Dave Madden, who directs the Air Force’s military satellite communications system program office. The Delta IV, which uses the RL10B-2 to power the upper stage, malfunctioned during an Oct. 8 GPS IIF launch and has not flown since. Air Force officials have yet to find a root cause for the low-thrust anomaly. Though ...


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