The S-IVB also continued to thrust in a reduced stage by venting gaseous hydrogen, to keep propellants settled inside their tanks and forestall gaseous cavities from forming in propellant feed lines. This venting also taken care of safe pressures as liquid hydrogen boiled off within the fuel tank. This https://brooksqqoro.loginblogin.com/32894799/manual-article-review-is-required-for-this-article