[PSUBS-MAILIST] New submarine

[Alan James]

Hi Scott,
G.L., Section 4, Design Loads, Table 4.1 says that for your designated depth, the collapse diving pressure divided by your nominal diving depth, has to be more than 1.73, & your test diving pressure has to be more than or equal to 1.2 x your nominal diving pressure.
So for a maximum operating depth of 1000 meters, build to a crush depth of at least 1,730 meters & test to a minimum of 1200 meters. In table 4.2 it is a bit confusing, but I am reading it as saying the view ports are to
be tested to 1.5 x your nominal dive depth. 
Re CAD programs; I bought Rhino 5, Orca, (which is a marine design plug-in for Rhino 5) & scan & solve.
Scan & solve is a basic FEA plug-in for Rhino. I had advice from a qualified person in the submersible design
field before purchasing. You can get in the ball park with the Scan & Solve FEA & then hand the design on to a qualified person with a more powerful program for refinement. I looked at Solid Works, but it was very complex
& expensive & if you aren't going to use it 40 hours a week you are gong to struggle. 
It would be a really good move for you, buying a CAD program. 
I also purchased a course on Rhino from Infinite Skills & in hindsight think that was a smart thing to do.
All the best with the new project.
Alan




________________________________
 From: swaters <swaters at waters-ks.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, April 9, 2014 11:14 AM
Subject: Re: [PSUBS-MAILIST] New submarine
 


So is the design of crush depth of 1750m and test to 1250m the idea? Next question is where can you find a pressure chamber that has 1670psi capability?
Thanks,
Scott Waters




Sent from my U.S. Cellular© Smartphone
Alan James <alanlindsayjames at yahoo.com> wrote:

Scott,
in general people design their boats with a crush depth of
twice their operating depth, then test them to 1.25 or 1.5 x
there proposed maximum operating depth.
So design to 2000 meters & test it to 1250 meters.
Alan


________________________________
 From: swaters <swaters at waters-ks.com>
To: personal_submersibles at psubs.org 
Sent: Tuesday, April 8, 2014 4:29 PM
Subject: [PSUBS-MAILIST] New submarine
 


I am playing with the idea of building another submarine. Here is what I am thinking.
1) This project needs to be as challenging as the same amount of difficulty as it was to build my first submarine
2) I want to have lots of bottom time with my K-350 to learn what needs to be improved on in design and ability.
3) Learn to use CAD 
4) Project will take 5-7 years to complete

My initial goals are
1) Hold 3 people
2) Weigh 10,500lbs or less
3) Depth of 3,300 feet (1000m)
4) Have a very effective range of abilities such as a good manipulator arm and tooling
5) Have a wide veiwing maybe a acylic dome front

Ok, shoot holes in the ideas. What will be the main challenges to overcome? What complications am I not considering?

Thanks,
Scott Waters






Sent from my U.S. Cellular© Smartphone
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