The S-IVB also continued to thrust in a small degree by venting gaseous hydrogen, to keep propellants settled inside their tanks and forestall gaseous cavities from forming in propellant feed lines. This venting also preserved Risk-free pressures as liquid hydrogen boiled off in the gas tank. This venting thrust https://danteoonlh.therainblog.com/32892687/detailed-notes-on-apollo-4-plus