The S-IVB also continued to thrust in a minimal amount by venting gaseous hydrogen, to help keep propellants settled of their tanks and stop gaseous cavities from forming in propellant feed strains. This venting also managed Harmless pressures as liquid hydrogen boiled off while in the gasoline tank. This https://devinwwuqq.snack-blog.com/33887338/apollo2-for-dummies