[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [PSUBS-MAILIST] Welding Revisited



Recently I was at the human powered sub races and had a pleasant
conversation with the head judge. He's a gentleman with vast experience
in submarines, having served on many types of submarines throughout a
long career. He had dives to six thousand feet, and he'd been a DSRV
captain. He commented that his only interaction with personal
submersibles was as an expert witness in a lawsuit. The lawsuit had come
about because someone built a sub designed to go to many hundreds of
feet, but it failed at only 30 feet and one of the two crew died.

The stresses at 200 feet are major.


Thanks,

Alec 

  


The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.

From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Lil Brother
LLC
Sent: Wednesday, July 25, 2007 12:25 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Welding Revisited

Ok,

We have discussed welding and the methods involved.

Shouldn't we also discuss the situations that pertain to each type and
the critical requirement for each?

I know that a professional welder knows what he is talking about, but I
think x-ray on welds that will never pass regular scuba diving depths is
a little extreme on the side of safety.

I'm not knocking safety at all, I tend to lean to the safe side of
everything. But there is a point to overkill when it comes to safety
measures.

I agree, if you are going to depths of 600 -1000 feet, I would
definitely have the most certified welder available, and have the welds
tested by x-ray.

But I don't see the need to go to that measure if the sub is only going
to a max depth of 200 ft.  I do see the need of the welds being proper,
airtight and strong.

But I'm a realist, so I can handle the opinions from whoever disagrees
with me.

James Long
Owner/Designer
Lil Brother LLC (Instrument Division) 





************************************************************************
************************************************************************
************************************************************************
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
************************************************************************
************************************************************************
************************************************************************




************************************************************************
************************************************************************
************************************************************************
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
************************************************************************
************************************************************************
************************************************************************