Hey Pierre,
Yea you assumed correctly and i like your idea. dono why i didnt think of
that its less prone to inaccuracy because its mush simpler to check the
setting with the gage. i have some questions about BIG:
how dose BIGs hatch seel? how did you make that seel?
i noticed that thr is a hatch clip on the outside, can it also be opned
from the inside? how?
How dose air go from the scuba tanks into the hull? how is the brathing
air flow regulated?
Dose BIG have a web page?
thnx silky
Hi Silky,
I like your idea.
As for (3) emergency use, I assume that one side of the piston (the side
with the spring) must be at 1atm of else you would only mesure pressure
difference...
I have another idea. If instead of using spring you use compressed air on
one side of the cylinder. So you want max deep of 100 foot (50 psi). you
slowly open a valve from air tank and adjust pressure inside cylinder to
50 psi with a gage. That way, it could be easy to adjust and also be
variable adjustement for any situation.
We could also used electricity for valves because lots of pneumatic
cylinder already commes with limit switches mounted on the core of the
cylinder. Off the shelf and ready to use.
My 2 cents to your idea...
Pierre Poulin
----- Original Message ----- From: "s ï l k y N?³" <silkyfx@hotmail.de>
To: <personal_submersibles@psubs.org>
Sent: Friday, June 10, 2005 4:39 AM
Subject: [PSUBS-MAILIST] Piston pressure regulator
Hey,
I have posted a picture on moki. It shows the basic principle of a
methord that could be used to regulate (three things) (1) the air
pressure difference between water and in hull. (2) Vent air out of an
ambieus sub. (3) automaticaly bring the sub back to the surface if it
goes under a preset depth (too near crush depth or Air related depths)
(example) the idea is 1 lubricated water proof piston with two open
sides. one open side exposed to the outer water pressure and the other to
the inside pressure. The displacement from its central position due to
presure difference is used to open - close two valves. one valve leads to
the breathing air suply the other (2) IS the air out vent.(link to image
at bottom)
Adjustable spring(s) could be used to controle the sensetivity of this
system. This could if implimented correctly be used to reduce the
probability of the piston bouncing up and down effect and reduce the
amount of air wasted due to small vertical movements.
How to use this as an emergency system (3) one could for example use a
stiffer spring to encrease the pressure needed to activate a valve and
increase the distance the piston must move before the valve is activated.
In this case the activated valve would be a secondairy blow ballast
valve.
I have scribles, notes & workings If you want more info.
thnx silky
_________________________________________________________________
Machen Sie lästigen E-Mails ein Ende. MSN Hotmail mit Junk-Mail-Filter.
http://www.msn.de/antispam/prevention/junkmailfilter Jetzt kostenlos
anmelden!
************************************************************************
************************************************************************
************************************************************************
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
our server receiving your request.
PSUBS.ORG
PO Box 311
Weare, NH 03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************