Being super lightweight structures, do rockets depend to some degree on internal pressure of their fuel tanks for structural integrity?

  • $\begingroup$ It's a good question; we certainly don't want this (from here) to happen! You might want to check out Is the pressurization of propellant tanks necessary for structural integrity? and it's accepted answer first and see if your question can be adjusted to be different. $\endgroup$ – uhoh Mar 7 '18 at 5:32
  • $\begingroup$ Even if a tank is designed for equal pressure inside and outside, it would be destroyed by relatively small positive or negative pressure differences. A small differential pressure acting on the very large surface of the tank would create huge forces. $\endgroup$ – Uwe Mar 7 '18 at 12:24

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