So it seems the Falcon 9 landing legs are powered by a helium precharge.

Does anyone know the pressure of that precharge? If no numbers for Falcon 9, is there at least a reasonable range of what the pressure might be?

  • $\begingroup$ 200 or 300 bar is a standard pressure for gaseous helium tanks. There are valves designed for this pressure. $\endgroup$
    – Uwe
    Commented Mar 26, 2021 at 15:44
  • $\begingroup$ Thanks, Uwe! So 3,000-4,000 psi. Wow that's a generous amount of pressure for the legs. $\endgroup$
    – user39728
    Commented Mar 26, 2021 at 17:58
  • $\begingroup$ Normally in these pneumatic systems the tank pressure gets regulated down to a working pressure. In the shuttle orbiter the regulator outlet pressure was ~750 psi, they also had ~3000 psi tanks. $\endgroup$ Commented Mar 28, 2021 at 1:09


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