[AR] Re: AW: AW: Re: Lightweight LN2O tank
- From: "Ray Rocket" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "ar0cketman" for DMARC)
- To: <arocket@xxxxxxxxxxxxx>
- Date: Fri, 12 Jan 2018 17:56:52 +0000 (UTC)
On Thu, 1/11/18, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
On Thu, Jan 11, 2018 at 09:43:51AM -0700, snyder@xxxxxxxxxx wrote:
The tanks would burst all by themselves after about 90 min.
There was some glazing on the interior surface, as you could see
in the cameras through the clear walls.
That sounds like the nitrous was dissolving into the PVC and weakening it.
This is most likely. Could a simple thermal failure also be possible?
Unless pumped, the N2O tank starts colder than ambient, especially during the
initial boiling phase. After filling, the nitrous heats up, absorbing thermal
energy from the PVC. Inner surface of the PVC is cooled, contracting and
becoming shiny as surface imperfections smooth out. Nitrous pressure climbs,
after 90 minutes the PVC is stressed to its limit and fails.
How would one differentiate the root cause? Would it be sufficient to weigh
the fragments on a sensitive scale and look for the interstitial N2O to leave?
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