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ULA’s Delta 4-Heavy rocket still grounded by launch pad problem

16 Oct 2020, 23:07 UTC
ULA’s Delta 4-Heavy rocket still grounded by launch pad problem
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Three swing arms are designed to pull away from the Delta 4-Heavy rocket at liftoff. Credit: United Launch Alliance
United Launch Alliance engineers have resolved the problem that triggered an abort of a planned Delta 4-Heavy rocket launch Sept. 30, but the company said Friday it is continuing to evaluate a concern with the launch pad swing arm retraction system at Cape Canaveral.
ULA said the Delta 4-Heavy’s mission to launch a classified National Reconnaissance Office spy satellite will be postponed beyond next week.
The launch provider, a 50-50 joint venture between Boeing and Lockheed Martin, said Friday that the Delta 4-Heavy launch date was now “indefinite” on the Eastern Range, which oversees launch operations at Cape Canaveral Air Force Station.
“With continued emphasis on mission success, our team will continue to test and evaluate the swing arm retraction system prior to the launch of the Delta 4-Heavy,” ULA tweeted. “We will confirm a launch date as soon as possible.”

The #NROL44 launch date is now indefinite on the range. With continued emphasis on mission success, our team will continue to test and evaluate the swing arm retraction system prior to the launch of the #DeltaIVHeavy. We will confirm a ...

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