Jay,
Learning is what the PSUB group is all about right. I should or rememered the article I recently read on Julius Kroehl's "Sub Marine Explorer" of 1865. Here is the link.
http://diving-industry.com/news/2006/04/23/the-secret-of-the-pearl-islands/#more-188
If you or anyone else comes across the data on that Spanish sub, I'd love to hear about it.
In regards to hyperbaric chambers when I speak of a 2 ATM chamber it's not having anything to do with decompressing a diver. The 2 ATM chambers are for HBO (hyperbaric oxygen) treatments to get O2 into your deep cell tissue to help deal with viruses, bacteria, detoxing, wound care, stroke victums, frost bite, reattached limps, etc., etc,. In my Great Uncles six person chamber since it's expensive and much more dangerous to fill the whole chamber with O2 we use a Scott Pressur-Vak II (BIBS) Mask. The Pressur Vak?II is designed to administer oxygen or gas mixtures to a diver or patient in a hyperbaric chamber environment. The demand regulator assembly provides breathing gas on demand (inhalation). The vacuum regulator allows the exhaled gases to be carried to the outside of the chamber thereby eliminating oxygen buildup or contamination of the chamber environment. The vacuum of the exhaled gas is a direct function of the differential pressure of the chamber and the ambient environment. My great uncle paid about $800 each for his Pressur Vak II masks.
http://www.frappr.com/?a=viewphoto&id=2384531&pid=3843109
http://www.frappr.com/?a=viewphoto&id=2384531&pid=3842954
http://www.amronintl.com/hyperbaric/products.cfm?id=482
We breath pure O2 through these BIBS masks and exhale through the second regulator in the BIBS which then sends it out of the chamber to then be carefully mixed with outside air.
The interior of this six person chamber was painted with a special epoxy paint, and when you use the chamber you must wear 100 percent cotton clothing with no dies in it to reduce the chance of electrostatic shock. You can see in this picture the intake and exhaust of the O2 as well as external lighting fixtures shining through the Hyzod view ports, now called Makrolon. The bulb in this light fixture is a screw in flouresant type to keep the heat down on the view port as well as the interior of the chamber.
http://www.frappr.com/?a=viewphoto&id=2384531&pid=3842505&myphotos=1
Makrolon is used by NASA and it gives you allot more strength per thickness compared to plexiglass. I find it easier to have my view ports water jet cut.
http://www.sdplastics.com/shef2.html
http://k-mac-plastics.com/hyzod-polycarbonate-sheet.htm
This six person chamber could likely take a hell of allot more hyperbaric pressure then it is currently using, and could likly be used successfully for decompressing a diver. The welds have not been X-rayed nor UT'd (ultra sound tested) and so it's not going to be ABS certified any time soon.
Regards,
Brent
" The difference between genius and madness is a fine line called success."
From: "Jay K. Jeffries" <bottomgun@mindspring.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: RE: [PSUBS-MAILIST] Perry lockout
Date: Sun, 28 Jan 2007 10:40:48 -0500
************************************************************************ ************************************************************************ ************************************************************************ 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 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************Brent,
There were several subs prior to Lake?s Argonaut with lock-out capability: Alligator (which NOAA and the US Navy have mounted an expedition to find), a post-Civil War submersible (forgot the name) that ended up in Panama pearl diving and the remains recently found on a beach there, and a Spanish sub that was way ahead of it?s time (restrained by the art of material science at the time).
R/J2
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
It is the mark of an educated mind to be able to entertain a thought without accepting it.
- Aristotle
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Saturday, January 27, 2007 11:28 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Perry lockout
Hello Frank,
I would venture to guess that the Simon Lakes Argonaut I was the first real submarine to have a diver lockout chamber where by you can open a bottom hatch and jump in. The link to a picture of the Argonaut I shows a downward opening hatch for the DLO.
http://www.tamu.edu/upress/BOOKS/1999/bigpoluw.htm
Even the Pitch Pine Submarine as the wooden prototype Argonaut Jr. was called. had a bottom diving hatch. Here is a page from Simon Lakes book call "The Submarine History of Simon Lake" I would guess that the Argonaut Jr was a ambient sub when the divers hatch was open as well as the rest of the time since the shape and material are not that conducive to 1 ATM operations.
http://www.amazon.com/gp/reader/0890968942/ref=sib_dp_pop_fc/103-9833771-7482211?ie=UTF8&p=S001#reader-link
The Kraka has this same basic set up in regards to the bottom hatch opening down and into the water, with a short rope to pull the hatch closed enough so it can be latched. Peter must of tested and planned for all his internal systems to be ok with the extra internal pressure it would take to pressurize the interior of Kraka so the bottom hatch could be opened and the water stay out of the sub. It's far easier to have the sub be ok with internal pressure on hatches, view ports, and the like if you only do it at depth. That way the sub is acting as a ambient sub while the divers bottom hatch is opened. Then you have to bleed off the extra pressure as you assend to the surface, either by leaving the bottom hatch open or valves and let the sub interior act as if it was a soft ballast tank, or use high volume pop off valves or use a high pressure air pump to return the interior of the sub to 1 ATM at depth.
http://www.vulcaniasubmarine.com/KRAKA.htm
The Euronaut on the other hand has a rotating hatch head that engages with what looks like eight dogs, and opens into the DLO. That's the only hatch in that bottom trunk unless he has another one below that opening down and into the water that I don't see, but I don't think there is a second hatch, so the seal on the rotating hatch in the floor would need the be tight and the eight dogs be able to with stand allot of pressure. Here is the picture of this hatch.
http://img411.imageshack.us/img411/13/0806588x425hu9.jpg
I've seen a stress analysis Carsten did on that hatch and so I'm sure he's worked it all out. Perhaps he will comment on this. Here is the link showing the stress analysis of the divers bottom hatch translated into English.
http://translate.google.com/translate?hl=en&sl=de&u=http://www.euronaut.org/&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Deuronaut%2Bsubmarine%26hl%3Den%26rls%3Dcom.microsoft:en-US
Amateurs built the Ark.
Professionals built the Titanic.Regards Brent
From: ShellyDalg@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Perry lockout
Date: Sat, 27 Jan 2007 19:56:59 ESTHello Brent. I've been following your thread and it sounds pretty interesting.
With a diver lockout hatch, could a guy pressurize the chamber, open the hatch, and reach out and grab stuff off the bottom? The hatch would probably need to open inward, and be VERY strong, but you may be able to get an old ship's bell, or some other memento of your dive.
Might be fun!.....Frank D.
