[PSUBS-MAILIST] many questions from a rookie

[David Colombo via Personal_Submersibles]

Here is a link to a presentation in 2004 by Dr. Jerry D. Stachiw on acrylic
viewports. Worth a read as well.

http://www.hydroports.com/documents/New_Orleans_Meeting-Feb_2004.pdf

Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com


On Mon, Feb 23, 2015 at 2:43 PM, Petar Topljak via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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*
>
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>
>
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>
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