ULA delays Atlas 5 launch to study unexpected engine vibrations

13 days ago   |   By Spaceflight Now

An RL10 engine fires during launch of an Atlas 5 rocket May 18 with the U.S. Space Force's SBIRS GEO 5 missile warning satellite. Credit: United Launch Alliance
United Launch Alliance's next Atlas 5 launch will carry Boeing's Starliner crew capsule into orbit July 30 on its second unpiloted test fight, officials confirmed Thursday. An Atlas 5 rocket for the U.S. military previously scheduled for June 23 has been postponed as engineers analyze unexpected vibrations of a new upper stage engine nozzle on a mission last month.
The Atlas 5 rocket slated to launch the Starliner test flight uses...
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