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Tagged with ullage terminology
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What is and what isn't ullage in rocket science?
This comment and others below this answer address ullage.
"Ullage" basically just means "the portion of the tank that isn't filled with liquid". The extended rocket-science implications of ullage ...
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Why did the S-IV-B refer to "jettison"ing its ullage?
This is based on a recent question about S-IV-B ullage motor shutoff timing, specifically something found in the Technical Information Summary AS-501, page 15:
Ullage Jettison ~ 532.
But why "...
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