<div dir="ltr">Hank, yes the rings are T-shaped.<div><br></div><div>Brian, I haven`t designed any reinforcement pad. You mean like the Pilot fish?</div><div>I can see that is a good way to strenghten the area. From my FEA analysis I had to beef up the thickness quite a bit in the tower reinforcement.</div><div><br></div><div>Regards</div><div>André</div><div> </div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-05-09 21:37 GMT+02:00 Brian Cox via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Andre,<br>
Do you have a reinforcement pad which would be integral to the hull surrounding the area next to where the nozzle (conning tower) will be ?<br>
<br>
Brian<br>
<br>
<br>
--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br>
<br>
From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<span class="">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
</span><span class="">Subject: Re: [PSUBS-MAILIST] Distortion when cutting in shell<br>
</span>Date: Sat, 9 May 2015 07:40:23 -0700<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
Andre,<br>
I don't know what type of ring you are using, I assume a T ring. I would think if the T ring is under load it could tip and loose shape. That is why I suggested to tack them in place. I can see that is a problem for you. You idea sounds good to me, maybe four good tacks in spots that are easy to grind off.<br>
Hank--------------------------------------------<br>
On Sat, 5/9/15, André Eriksen via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br>
<br>
Subject: Re: [PSUBS-MAILIST] Distortion when cutting in shell<br>
To: "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Received: Saturday, May 9, 2015, 9:55 AM<br>
<br>
Thanks for<br>
the input guys.Mine is a cylinder. <br>
<br>
Problem<br>
is the rings are placed similar like the k-boats. If I place<br>
them at the excact place I would cut into them. And I can`t<br>
finish the weld on the tower-insert with the rings in<br>
place.So maybe I can tack them in a little bit<br>
offset, cut the hole, tack in the tower-insert, remove the<br>
rings, finish welding the tower insert, then weld in the<br>
rings.Does this sound like a good<br>
procedure?<br>
Thanks,André<br>
2015-05-09 3:49 GMT+02:00<br>
hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>:<br>
<br>
<br>
Andre<br>
<br>
I would defiantly place the two rings in and I would put<br>
them exactly where they go and tack them. There is a good<br>
chance that the opening will create a weak spot so to speak<br>
and the shell will bend up at the center of the hole. <br>
Brian is right if it is a sphere, no worries. The cylinder<br>
can go egg shape.<br>
<br>
Hank --------------------------------------------<br>
<br>
On Fri, 5/8/15, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
wrote:<br>
<br>
<br>
<br>
Subject: Re: [PSUBS-MAILIST] Distortion when cutting in<br>
shell<br>
<br>
To: "Personal<br>
Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<br>
Received: Friday, May 8, 2015, 7:05 PM<br>
<br>
<br>
<br>
That's 1/2" if<br>
<br>
it's A516 70 grade it should be no problem, <br>
<br>
My Sphere thickness is 3/8" and<br>
<br>
I could not detect any distortion.<br>
<br>
Brian<br>
<br>
<br>
<br>
--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br>
wrote:<br>
<br>
<br>
<br>
From: André Eriksen via<br>
<br>
Personal_Submersibles<br>
<br>
<<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<br>
To:<br>
<br>
Personal Submersibles General Discussion<br>
<br>
<<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<br>
Subject: [PSUBS-MAILIST] Distortion when<br>
<br>
cutting in shell<br>
<br>
Date: Fri, 8 May 2015<br>
<br>
23:10:03 +0200<br>
<br>
<br>
<br>
Hi all,<br>
<br>
When you cut out the hole for the<br>
<br>
conningtower, is distortion of the shell an<br>
<br>
issue?<br>
<br>
My shell is<br>
<br>
12mm in thickness. Wondering if I should place a<br>
<br>
reinforcement ring on either side of the hole to be cut<br>
-Not<br>
<br>
welding them so I can remove them after I have tacked<br>
the<br>
<br>
tower in place.<br>
<br>
<br>
<br>
<br>
<br>
ThanksAndré<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><font face="arial black,sans-serif">Med Vennlig Hilsen / Regards</font></div><div><font face="arial black,sans-serif"><em>André Eriksen</em></font></div></div></div>
</div>