[PSUBS-MAILIST] many questions from a rookie

[Håvard Hardy via Personal_Submersibles]

i allways wantet to build a sub, but still got allot of research to do..
there is a few things i could not find the answer in the internet, so have
to ask here.

i was thinking of building a small 1 man sub. i used the psub Unstiffened
Cylinder Calculator <http://www.psubs.org/design/unstiffcyl> to check how
thick the hull hadd to be, to get to 200 meters, the hull have to be over
15mm thick.. so thought maybe i should use ribbs to get it thinner, but
dont know how to calculate whit ribs, and how to find out how many ribs i
need, and spacing betwen them.

a few other tecnical things i dont know.

How to you keep the pressure not to rise in the pressure hull? you need
oxygen, so the pressure will rise?..

and how do you get the propeler shaft thru the hull, and not get water in
the sub. easy on a boat where the pressure is not so big, but att 500 feet?

does somone sell the through hulls to get wires thru the pressure hull? or
do i have to make on my own?

if the pressure hull have a operation deapth off 500 feet, how do i find
out how thick the Viewports have to be..

and does anyone no of a good drawing program to draw the sub? have only
made it on paper.. need to make on the computer and get a FEA.

probably have many other things coming :)

Håvard.
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