[PSUBS-MAILIST] many questions from a rookie

[Petar Topljak via Personal_Submersibles]

Hi,

To calculate viewports and pressure vessel (hull) you can download for free
ASME PVHO standard which is very simple and guides you trough the process.
Standard provides stiffener geometry, window geometry etc.

Regards,

Håvard,



Some quick awnsers..



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.

> Hull dia??



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?..

>>You consume / burn  the oxygen. No pressure 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?

>> ceramic / mechanical seal like in pumps



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

>> Subconn and similar company’s sell them. You can also use high pressure
cable glands  (up to 400 M) Or make your own with brass and Epoxy.



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

See table: You only have to translate a few German words.



*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.*

If you want it legal: ZWcad is a cheap but good Autocad clone



*Regards, Emile*

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20150223/ecd8fbcd/attachment.html>