The S-IVB also continued to thrust in a small degree by venting gaseous hydrogen, to maintain propellants settled in their tanks and stop gaseous cavities from forming in propellant feed lines. This venting also taken care of Harmless pressures as liquid hydrogen boiled off within the gas tank. This venting thrust quickly exceeded aerodynamic drag.

The S-IVB also continued to thrust at a minimal amount by venting gaseous hydrogen, to maintain propellants settled in their tanks and prevent gaseous cavities from forming in propellant feed strains. This venting also managed safe pressures as liquid hydrogen boiled off inside the gas tank. This venting thrust conveniently exceeded aerodynamic dra