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Phil & Dean,
This is intriguing. What pressure differential do
you pump it to? Do you use the over-pressure relief or another port?
What's the whole procedure?
Best regards,
Jim
In a message dated 1/4/2011 1:04:17 P.M. Central Standard Time,
alanjames@xtra.co.nz writes:
Hi
Dean, have you piped the intake to the tyre inflator to use it as a vacuum
pump from the outside of the sub. Or do you sit inside & pump air out
from there. Regards Alan
From: "Recon1st@aol.com"
<Recon1st@aol.com>
To:
personal_submersibles@psubs.org
Sent: Wed, 5 January, 2011 3:46:33
AM
Subject: Re:
[PSUBS-MAILIST] Pre-dive Vacuum
Jim on my sub I installed a small air
pump I made from these small 12v
auto tire inflator. It
works very well.
Dean
In a message dated 1/2/2011 6:14:19 P.M. Central Standard Time,
JimToddPsub@aol.com writes:
Phil,
That's certainly worth putting on a pre-dive
checklist. It will definitely go on mine. How do you go about
it?
Thanks,
Jim
In a message dated 1/2/2011 1:51:25 P.M. Central Standard Time,
phil@philnuytten.com writes:
We never dive any of our subs unless they've held vacuum for several
minutes immediately prior to launch - this procedure tests and 'sets' the
o rings and avoids a nasty surprise at the end of a large air-gap
launch!
Phil |