APOLLO4 BLUE PLUS - AN OVERVIEW

apollo4 blue plus - An Overview

The S-IVB also continued to thrust at a reduced level by venting gaseous hydrogen, to keep propellants settled in their tanks and prevent gaseous cavities from forming in propellant feed lines. This venting also maintained safe pressures as liquid hydrogen boiled off within the fuel tank. This venting thrust easily exceeded aerodynamic drag.[citati

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