[AR] Re: pressurization (was Re: Portland State Aerospace Society)

  • From: Chris Jones <clj@xxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Fri, 22 Apr 2016 22:11:29 -0400

On 04/22/16 10:00 PM, Paul Mueller wrote:

Thank you. So the Delta I/II/III used nitrogen? I guess not all
Western rockets (or all "dino-space") use/used helium for LOX
pressurization. Now I'm curious about Falcon 9 and Ariane V. I can
see where nitrogen could be a problem with the densified, chilled LOX
in the latest Falcon 9s.

Googling "falcon 9 pressurization" reveals multiple sources that say
it's helium (heated by exhaust products).

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