The S-IVB also continued to thrust in a reduced stage by venting gaseous hydrogen, to keep propellants settled inside their tanks and prevent gaseous cavities from forming in propellant feed traces. This venting also managed Safe and sound pressures as liquid hydrogen boiled off within the gasoline tank. This https://systemonachip76307.dailyblogzz.com/34481248/indicators-on-apollo4-blue-plus-you-should-know