Vance,
In order for that kind of battery box to
work structurally, each battery has to have its own box.
Adam
-----Original Message-----
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of vbra676539@aol.com
Sent: Monday, April 10, 2006 3:52
PM
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
structural question
Thanks for the response. I came
back on another email about the Nekton/Delta boats, which use the same
arrangement with staggering success. And there is no reinforcement at the hull
joint. The shell is welded straight to the box with a couple or three
inches sticking through. On top of which, the Delta is 42" diameter and
only has two ribs, one forward and one aft of the conning tower (which has an
extensive arc of reinforcement, as you will be able to see from photos on
their web page).
-----Original Message-----
From: Dan H. <jmachine@adelphia.net>
To: personal_submersibles@psubs.org
Sent: Mon, 10 Apr 2006 08:42:16 -0400
Subject: Re: [PSUBS-MAILIST] structural question
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.
----- Original Message -----
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.
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