Re: HO Tank Car Lid

Claus Schlund \(HGM\)

Hi Ed and List Members,
That was subtle Ed, very subtle...
What Ed is trying to say is that normal atmospheric pressure is about 14.7 PSI.
Thus a PERFECT VACUUM would read at -14.7 PSI (note the minus sign).
Therefore, a "vacuum at -27psi" is not possible under any circumstance on earth
Claus Schlund

----- Original Message -----
Sent: Monday, November 23, 2020 5:13 PM
Subject: Re: [RealSTMFC] HO Tank Car Lid

"...the destructive power of a vacuum at -27psi."

I used to run a three-stage vacuum pump, and I could never get it below approx -15 psi.  Wonder what I was doing wrong.


Edward Sutorik

On Mon, Nov 23, 2020 at 01:14 PM, Charles Peck wrote:
Here is a tank car vacuum collapse live.
Chuck Peck

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