Vance,
Wouldn't the most elegant solution be to leave the cylindrical hull
intact,
but put your speed controllers on the outside? That way the heavy gauge
cables don't need penetrators, and all you bring into the hull are the
skinny control cables. I'm assuming the motivator here is to minimize
penetrators?
cheers,
Alec
_____
From: owner-personal_submersibles@psubs.org on behalf of Dan H.
Sent: Mon 4/10/2006 8:42 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] structural question
Vance,
I'm not the guy to do the calculations but I'd bet you would need to
reinforce the slot your taking out of the hull tube similar to the way you
have to reinforce around a viewport. The forces in the hull tube would be
trying to close your slot and would have to be carried across the opening
with something substantial. More then just the ribs in that area.
Also, with the batteries in a box like that you would loose the protection
in case of a battery explosion. The way it is now, the pod end cap will
blow off but you won't flood or get hit. But, Maybe battery
explosions
aren't such a big problem as I was led to believe.
Dan H,
----- Original Message -----
From: vbra676539@aol.com <mailto:vbra676539@aol.com>
To: personal_submersibles@psubs.org
<mailto:personal_submersibles@psubs.org>
Sent: Sunday, April 09, 2006 1:22 PM
Subject: [PSUBS-MAILIST] structural question
I'm planning on another K-sub, but thinking about a box keel like the
Nektons and Delta had, rather than pods. Has anyone got an idea about how
to
figure structure on something like that? The Nekton's box was 9/16" wall,
flat side and bottom, and reinforced with flat plates running athwartships
on 18" centers (more or less). The hulls were the same thickness and the
same material (A516 Grade 70).
I'm wondering if there would be any penalty to building a 1/2" thick box
with 1/4" dividers matched to the ring stiffeners in the hull (ie., 12"
centers). The box would be a foot square in cross section, and if all
seems
well, would be welded through a slot in the hull and covered inside with a
reinforced aluminum deck plate gasketed and vented for charging. If the
pressure hull is six feet long in the cylinder, that would give me room
for
a grunch of 85 amp deep cycle batteries (more than called for) and still
not
kill my payload.
Anyone not familiar with K-subs might think all this sounds pretty heavy.
Have a look at the lead load in Dan's boat, if you think we don't have it
to
spare.
Vance
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