The S-IVB also ongoing to thrust at a reduced level by venting gaseous hydrogen, to keep propellants settled of their tanks and prevent gaseous cavities from forming in propellant feed traces. This venting also maintained Risk-free pressures as liquid hydrogen boiled off in the fuel tank. This venting thrust https://raymondazyws.thechapblog.com/33113401/detailed-notes-on-apollo-4-plus