Re: [PSUBS-MAILIST] Pressurizing interior of pressure hull

[MerlinSub@t-online.de (Carsten Standfuss)]

I did the trick with Sgt.Peppers but the opposite way. 
Close the sub. Open the snorkel valve for (breezing on the surface with
closed hatch) and brezze out of my lungs 3-4 times. Closed vale and look
on the barometer which was now about 50 Millibar down for a Minute or
two. If the barometer stay - eveything is tight.

You can see the snorkel device hose on picture Nr.4 inside the hatch. 
http://www.psubs.org/psub_pic/sgt_pepper.html

I use the same vale to equalize the inside and outside pressure of the
sub before open the hatch after the dive. 

Will do simillar tricks with the Euronaut. After 8-16 hours under water 
the inside pressure will be slightly differnet from the atmospheric
pressure (weather change, temperation inside the sub change, small leaks
or blowings from the scuba air filling system etc. )

Regards Carsten

Marten Liebster schrieb:
> 
> I was looking through the USS Pampanito site. In the diving and surfacing
> section under the technology section, there's mention of pressurizing the
> interior of the sub.
> 
> Diving:
> "Air is bled into the ship when green lights show that all hull openings are
> closed. Watertight integrity is assured when the internal air pressure
> remains constant."
> 
> Surfacing:
> "During this interval, the low-pressure blowers, using air from within the
> ship, are completing the blowing of the main ballast tanks and reducing the
> pressure within the hull. Usually the pressure is equalized before the lower
> conning tower hatch is opened."
> 
> Does anyone do, or plan to do, this with their 1 atm sub?
> 
> Marten
> 
> (I searched the archives and the only thread about pressurizing the interior
> of a 1-atm was in the event of a leak)
> 
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
> 
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
>         removeme-personal_submersibles@psubs.org
> 
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of receipt
> of your request.
> 
> mailto:removeme-personal_submersibles@psubs.org
> 
> PSUBS.ORG
> PO Box 311
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************




************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of receipt
of your request.

mailto:removeme-personal_submersibles@psubs.org

PSUBS.ORG
PO Box 311
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************