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Re: [PSUBS-MAILIST] hull and glass
Mike,
A thousand feet is deep for many PSUBS. My
material of choice is "tried and true" Steel. Pressure vestal quality
steel. It's easy to find and not to bad to work with. There's a lot
of information available on it too. The extra weight in a sub isn't
usually a really big deal since your building it to sink anyway.
If it doesn't weigh it's weight in water displaced, you built a surface
boat.
To build a steel sub to go a thousand feet of depth
though you may be reaching the upper end of weight to PSUB size ratio
though. It depends on the overall displacement of the sub your
building. With steel, you MUST know how to weld. Even if you farm
out most of it, there will still be many small welding jobs that you have to do
along the way.
Plexiglas G is the material of choice for
viewports. It too is easy to come by and work with. Do some research
in how to machine and anneal it though. There is good data available on it
also.
You may consider designing 2.5 safety factor for a
collapse depth. You should do an unmanned test to 1.5-2.0, just to prove
the hull.
I don't know about fabric over any kind of
frame. It's not my area.
You will probably have to have frames in your hull
to keep roundness no matter the material. Your hull must be
concentric. You can't have any flat spots or even out of roundness.
You can't be out of round anymore then half the hull material
thickness.
Good luck,
Dan H.
----- Original Message -----
Sent: Sunday, March 16, 2003 8:47
AM
Subject: [PSUBS-MAILIST] hull and
glass
Hi everybody I want to know what most of you guys perfeer to use for
building your hulls ? I am designing a 1 Atmosphere sub that will ba able to
dive to 1,000' ( I know I have to build it with a 2X safety factor ), what
should I make the pressure hull out of ? What should I make the cabin
windows out of ? What is one of the best ways to weld everthing together ?
Thanks for the help,
Mike
HGC. Michael
The new Guardian
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