[PSUBS-MAILIST] Removable tru hulls

[Alec Smyth via Personal_Submersibles]

Well here we get into ambiguous territory because I don't know how thick is
thick enough to prevent distortion. One significant difference with a
window seat is that the window seat is carbon steel rather than stainless,
and I suspect SS will distort much more easily. If you can find an
installation spot on the head, your design will be way more efficient in
weight and $$$ because 1" thick material will suffice. I don't know, you
might need to go to 3" or something. Or perhaps you could use 1" if you
bolted it between two very solid steel discs before welding it in. Perhaps
Dan L can chime in if he's reading this.

On Fri, Jan 16, 2015 at 11:52 AM, swaters at waters-ks.com via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:

> Good point Alec. I understand what you are saying. Pehaps I should
> redesign it to be thicker and be similar to a side veiwport. Thoughts?
> Thanks,
> Scott Waters
>
>
> Sent from my U.S. Cellular® Smartphone
>
>
> -------- Original message --------
> From: Alec Smyth via Personal_Submersibles
> Date:01/16/2015 9:39 AM (GMT-06:00)
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Removable tru hulls
>
> Just for everyone else, what we are talking about here is not a penetrator
> but a removable bulkhead into which you can screw penetrators. What Snoopy
> has on her stern endcap, which is on the project page. Scott, these should
> go on the head itself, but as Vance mentioned avoid the knuckle (the part
> where the head has maximum curvature). I wanted to add to that you should
> not put these in the cylindrical portion of the hull. The bulkhead seats
> are beefy, but even so if you weld them into the cylinder the weld tension
> will bend them out of plane and they will no longer offer a flat seat. Its
> hard to explain in an email, but the reason this happens is, when you weld
> them into the cylinder, the weld itself is not on a flat plane as it goes
> around the insert, it is curved. If you put them into the endcaps, the weld
> is in almost the same plane all the way around and the insert will not
> distort.
>
> Locating smaller through-hulls (like one or two inch diameter) on the
> cylinder does not present this problem, but the big ones do.
>
>
> Best,
>
> Alec
>
> On Fri, Jan 16, 2015 at 9:00 AM, swaters at waters-ks.com via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>> I am putting two removeable tru hulls in Trustworthy (same as Alec) for
>> my manipulator arms. I want to put them close to the front veiw port of the
>> sub. I know if I get to close to the front veiw port it hurts the
>> structure. How close can I get to it and still not hurt the structure?
>> Thanks,
>> Scott Waters
>>
>>
>> Sent from my U.S. Cellular® Smartphone
>>
>> _______________________________________________
>> 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/20150116/db24705b/attachment.html>