[PSUBS-MAILIST] Acrylic domes

Thu Sep 7 17:18:26 EDT 2017

As Mark Twain once said "rumors of my demise have been greatly exaggerated!". I still fabricate acrylic (including domes) but for liability reasons they are not sold with the implication that they are suitable for any specific application. Domes intended to be used on a manned submersible should be tested to meet applicable standards (such as specified by the American Bureau of Shipping) by the end user to determine suitability.
Thanks,
Greg

      From: roberto alvarez via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, September 6, 2017 11:03 PM
 Subject: Re: [PSUBS-MAILIST] k-250 building questions

in usa who make then?
2017-09-06 6:38 GMT+02:00 irox via Personal_Submersibles <personal_submersibles at psubs.org>:

Hi Roberto, Philippe,
I purchased one of Emile's domes from here:
https://www.airesearch.nl/ products/
Very happy to get it, but full disclosure, I've not actually fitted it or dive with it on my K250 restoration (oh-my-god-why-didn't-i-build- one-from-scratch) project.
Cheers,  Ian.

-----Original Message-----
From: roberto alvarez via Personal_Submersibles 
Sent: Sep 5, 2017 9:04 PM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] k-250 building questions

Were i can contact Emile for the acrylic? thank`s
2017-09-06 3:54 GMT+02:00 Alec Smyth via Personal_Submersibles <personal_submersibles at psubs. org>:

Hi Philippe and congrats on the undertaking! I had a K250 for about 12 years, so here are my two cents. 
1) Precisely because they are in the cabin, I would recommend AGM batteries for safety. Of course true that Kittredge used traditional lead-acid for years without incident, but since there is something safer these days, it seems logical to make use of that. 
2) On my boat I added saddle tanks and they worked well, but as a complement to the standard ones. You can see pictures here: http://www.psubs.org/pro jects/1234567810/snoopyin2012/
If my saddle tanks had been the only tanks, they would have needed to be larger, but that can also create some complications related to longitudinal stability, and the side thrusters don't make it any easier. In short yes it should be possible, and as an example you might look up the K250 called "Great White" (although I have only seen photos of it which don't show all the details of the MBTs.) However, the standard tanks should not be too hard to make, they are a good shape to lay fiberglass because there are no sharp edges, which are an invitation to forming bubbles as lay the cloth. I'm really bad at fiberglass work myself, but the standard MBTs are a good first project.  
3) For the acrylic my advice is the opposite - I would not even try that myself and would go to the experts. There are two here, Greg and Emile. Greg is without a fabrication facility at the moment, so I that leaves Emile.
4) There are indeed a couple of K250s up on the great lakes. Perhaps someone will speak up...

Best,
Alec
On Tue, Sep 5, 2017 at 8:56 PM, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs.o rg> wrote:

Hi All,
I undertook the construction of a k-250 submarine. I have most of the metal components to make the pressure hull. I have some questions about batteries, MBT and acrylics dome.
-Is it a good idea to use deep cycle lead-acid battery inside the pressure hull ? I read on old psubs mailing list to open the hatch when the batteries is charging. (h2)?
-Do you think that the MBT can be replace by steel saddle tanks ? I have no idea how to make the original one and if I can upgrade the original MBT it will be great.
-I try to find someone to make my acrylic dome with some experience in submarine dome forming.
-I live in Quebec, Canada. So, if you know k-250 owner near New Hamphire, Vermont or Main it will be great if I can take a look on the sub. An hour or two, I do not want to disturb the owner.
tanks
Philippe 
phelop at gmail.com

______________________________ _________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.or g
http://www.psubs.org/mailman/l istinfo.cgi/personal_submersib les

______________________________ _________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.or g
http://www.psubs.org/mailman/l istinfo.cgi/personal_submersib les

______________________________ _________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs. org
http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles

_______________________________________________
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/20170907/b5477bd4/attachment.html>