THE SMART TRICK OF AMBIQ APOLLO3 THAT NOBODY IS DISCUSSING

The S-IVB also ongoing to thrust at a very low amount 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 Secure pressures as liquid hydrogen boiled off from the fuel tank. This venting thrust very easily exceeded aerodynamic drag.