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The S-IVB also continued to thrust at a small stage by venting gaseous hydrogen, to help keep propellants settled of their tanks and stop gaseous cavities from forming in propellant feed lines. This venting also maintained Harmless pressures as liquid hydrogen boiled off from the fuel tank. This venting thrust easily exceeded aerodynamic drag.[cita
The S-IVB also continued to thrust in a minimal level by venting gaseous hydrogen, to maintain propellants settled inside their tanks and prevent gaseous cavities from forming in propellant feed strains. This venting also preserved Protected pressures as liquid hydrogen boiled off within the gas tank. This venting thrust easily exceeded aerodynamic