That's why I called it a craaazy idea.
I know each curved tube would be a seperate
pressure vessel of sorts or possibly the inside surface of the hull where
the tube welds against the inside of the hull would be the pressure
vessel. What I am wondering is....wouldn't there be pressure
against the inside surface of the hull where the
tube terminates against it? I picture the pressure in the curved tubes pushing
inward in all directions within the tube, so wouldn't that also push SOME
against the inner surface of the hull outwardly?
I picture hundreds of thick curved tubes shaped
like sink traps open to the outside on one end and penetrating the hull wherein
the other end is then welded to the inner surface of the main pressure hull.
Since the pressure in the tubes would be
the same pressure exerted against the entire main
hull, I again come back to the question....would there be any pressure AT ALL
exerted against the inside surface of the hull where the tube terminates?
If this worked I know it would be problematic
but I am just interested in the theory. I know for
each action there is an equal and opposite reaction. In this case pressure is
the action and resistance stress or implosion is the reaction. What I am seeking
is theoretically redirecting that action so it
becomes its own REaction and cancels itself out.
Now this is REALLY going to sound nuts, but what would Isaac Newton say if he
had knowledge of antimatter's existance and you posed the question of what
would happen if you fired two projectiles
of equal weight head on into each other and one was
made of matter and the other of antimatter? According to Newton something has to
give right? But not in that case. They would simply cancel each other out. Now I
know antimatter has nothing to do with
what we are talking about here, but It just may be
possible that Newton's law could be violiated and is not a total absolute. But
I'm sure I'm missing something here and not about to violate Newton's law.
Again, would there be any pressure exerted against the inside of
the hull pushing outwardly in my above curved tube scenereo?
Kindest Regards,
Crazy Bill.
----- Original Message -----
Sent: Saturday, May 14, 2005 11:08
AM
Subject: Re: [PSUBS-MAILIST] Crazy
idea.
This might confuse some folks. This is a completely different
thing than Bill was thinking of. Bill was using only ambient pressures and
counting the forces in helpful directions and at least partially ignoring
forces against the hull. He wasn't summing the forces correctly. He was trying
to violate Newtons third law.
Gordon Alexander
Ian Roxborough
wrote:
Hi Bill,
some research has been done on this idea. But they are two main
differences between what you describe and the research I've read.
First is that rather than use a horse shoe shaped stiffener, the
stiffener has been made out of either a complete tube (i.e. toroid),
or a longer tube coiled around the inside of the pressure vessel.
The second change is that rather than exposing the inside of the
tube to external pressure, they are pressurized to several times
higher than the external pressure.
The book "Pressure Vessels - external pressure Technology" by Carl
T. F. Ross, discusses tube stiffened pressure vessels on page 286.
Later on (page 321) there is an experiment using a tube stiffened
dome in a pressure test tank. The tubing was pressurized to 13bar
and the fail pressure of the dome was 3bar.
The advantage of the tube stiffened pressure-vessels is that if you
increase the internal tube pressure, you increase the crush depth.
Anyway, it works, it has been done in laboratory conditions, but
I do not know of a non-test tube stiffened pressure-vessel.
Cheers,
Ian.
On Sat, 14 May 2005 08:25:13 -0400
"Akins" <lakins1@tampabay.rr.com> wrote:
Hi forum.
I just had a craaaazy idea. This just jumped into my head and I wonder if anyone has ever tried it or any research done on it.
Suspose you had a pressure hull with horseshoe shaped tubes penetrating the hull all over its entire surface. Then suspose the water
entered into the open ended OUTSIDE of those tubes and the tubes were welded where they penetrated the hull and also against the inside of the hull facing outward so the outside
water pressure enters the open end and is now pushing OUTWARD against the inside of your hull. Would this work to counteract some of the inward pressure on
the hull? I was thinking of a way to use water pressure to counteract itself by taking its inward pushing pressure and curving back outward against the inside of your pressure hull by use of horseshoe shaped tubes.
Or am I missing something basic again about pressure?
Kindest Regards,
Bill Akins.
************************************************************************
************************************************************************
************************************************************************
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
************************************************************************
************************************************************************
************************************************************************
************************************************************************
************************************************************************
************************************************************************ 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
************************************************************************
************************************************************************
************************************************************************