<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top">Late to the party, busy shooting kid vids.<br/><br/>I just modeled and analyzed the VBT last week, talk about timing. Several things struck me, one is that the internal volume is a nearly exact 1 cu ft, (the assembly weight approx 43 lbs) another being the funky placement of both the vent and flood penetrations, neither of which allow for full advantage to be taken of the internal volume. Both suggestions of a drain plug as well as repositioning of the penetrations being sound propositions.<br/><br/>Another thing that struck me is that the welded mounting is not conducive to removal and replacement, a bolt-on affair is highly preferable. And yet another revelation being that two of these mounted far enough apart in an elongated design could be possibly considered to make for a viable trim by moments system. However, I've not yet done calcs on the effectiveness of
that.<br/><br/>Joe<br/><br/><br/><a href="http://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a></td></tr></table> <div id="_origMsg_">
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<b>
<span style="font-weight:bold">From:</span>
</b>
jimtoddpsub@aol.com <jimtoddpsub@aol.com>; <br>
<b>
<span style="font-weight:bold">To:</span>
</b>
<personal_submersibles@psubs.org>; <br>
<b>
<span style="font-weight:bold">Subject:</span>
</b>
Re: [PSUBS-MAILIST] VBT for K-350 <br>
<b>
<span style="font-weight:bold">Sent:</span>
</b>
Wed, Dec 18, 2013 12:02:48 PM <br>
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</font><div><font size="3">Thanks, James. I had missed Dan's advice on welding in a stainless steel bushing.</font></div>
<div><font face="Arial, Helvetica, sans-serif" size="3">-Jim</font></div>
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<div style="color:black;font-family:arial, helvetica;font-size:10pt;">-----Original Message-----<br clear="none">
From: James Frankland <jamesf@guernseysubmarine.com><br clear="none">
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none">
Sent: Wed, Dec 18, 2013 4:01 am<br clear="none">
Subject: Re: [PSUBS-MAILIST] VBT for K-350<br clear="none">
<br clear="none">
<div class="yqt2722053999" id="yqt07409"><div id="AOLMsgPart_2_1e84fd70-8107-400b-8490-5ae3b3c69769">
Its sch40 pipe, which for 10" pipe is 0.37", about 9mm.<br clear="none">
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<div class="gmail_quote">On 18 December 2013 04:39, Jon Wallace <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:jon.wallace@yahoo.com" target="_blank" href="javascript:return">jon.wallace@yahoo.com</a>></span> wrote:<br clear="none">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204, 204, 204);border-left-width:1px;border-left-style:solid;">STD pipe...but I don't recall the thickness off the top of my head.<br clear="none">
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<div class="im">On Tue, 12/17/13, <a rel="nofollow" shape="rect" ymailto="mailto:jimtoddpsub@aol.com" target="_blank" href="javascript:return">jimtoddpsub@aol.com</a> <<a rel="nofollow" shape="rect" ymailto="mailto:jimtoddpsub@aol.com" target="_blank" href="javascript:return">jimtoddpsub@aol.com</a>> wrote:<br clear="none">
<br clear="none">
Subject: Re: [PSUBS-MAILIST] VBT for K-350<br clear="none">
</div>
To: <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="javascript:return">personal_submersibles@psubs.org</a><br clear="none">
Date: Tuesday, December 17, 2013, 10:40 PM<br clear="none">
<div>
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Bob et al,<br clear="none">
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What's the standard wall thickness<br clear="none">
on the K-boat VBT? Is it approved procedure to weld<br clear="none">
extra material at the [water valve/drain plug] site before<br clear="none">
threading it? If so, it seems it would be possible to<br clear="none">
have the insert flush with the interior wall. At least<br clear="none">
it wouldn't project where it could interfere with<br clear="none">
draining of the tank and would make it easier to<br clear="none">
flush.<br clear="none">
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Thanks,<br clear="none">
<br clear="none">
Jim<br clear="none">
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-----Original Message-----<br clear="none">
<br clear="none">
From: Bob Travis <<a rel="nofollow" shape="rect" ymailto="mailto:bobtravis@comcast.net" target="_blank" href="javascript:return">bobtravis@comcast.net</a>><br clear="none">
<br clear="none">
To: Personal Submersibles General Discussion<br clear="none">
<<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="javascript:return">personal_submersibles@psubs.org</a>><br clear="none">
<br clear="none">
Sent: Tue, Dec 17, 2013 4:26 pm<br clear="none">
<br clear="none">
Subject: Re: [PSUBS-MAILIST] VBT for K-350<br clear="none">
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Thanks for the input!! I think I'm going to<br clear="none">
try a stainless plug. I'll let you know how it<br clear="none">
goes. <br clear="none">
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<br clear="none">
<br clear="none">
Sent from my iPhone<br clear="none">
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<br clear="none">
On Dec 17, 2013, at 6:58 AM, James Frankland <<a rel="nofollow" shape="rect" ymailto="mailto:jamesf@guernseysubmarine.com" target="_blank" href="javascript:return">jamesf@guernseysubmarine.com</a>><br clear="none">
wrote:<br clear="none">
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This has given me an idea. Ive got loads of this<br clear="none">
fluid film stuff. Im tempted to pour some into the<br clear="none">
tank to give it a bit of protection over the winter. <br clear="none">
Might have to experiment with it a bit first to make sure<br clear="none">
its not going to clog it up.<br clear="none">
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<a rel="nofollow" shape="rect" target="_blank" href="http://www.fluid-film.com/products/properties_liquida.html">http://www.fluid-film.com/products/properties_liquida.html</a><br clear="none">
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On 17 December 2013<br clear="none">
14:24, Jon Wallace <<a rel="nofollow" shape="rect" ymailto="mailto:jonw@psubs.org" target="_blank" href="javascript:return">jonw@psubs.org</a>><br clear="none">
wrote:<br clear="none">
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<br clear="none">
I highly encourage you to modify it. The one piece of<br clear="none">
the K600 that is obviously not useable is the VBT (identical<br clear="none">
to the K-350). The plug suggested by Dan is a good<br clear="none">
option but with either an electric or hydraulic controlled<br clear="none">
valve you could modify the inflow/outflow from the middle of<br clear="none">
the end-cap to the bottom of the tank. I also wonder<br clear="none">
if instead of an FRP tank you could modify an AL-80 or<br clear="none">
AL-100 scuba tank to perform the same function.<br clear="none">
Unfortunately they are not large volume and would not<br clear="none">
produce a lot of buoyancy.<br clear="none">
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Jon<br clear="none">
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On 12/17/2013 1:10 AM, Bob Travis wrote:<br clear="none">
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I'm<br clear="none">
about ready to assemble my VBT and have noticed that there<br clear="none">
will be about an inch of water left inside after it has been<br clear="none">
fully blown. I looked through the archives and<br clear="none">
can't find any discussion about water remaining in the<br clear="none">
tank. Is this a bad thing? All the photos of all the<br clear="none">
other K-350's that I've looked at don't have any<br clear="none">
way of draining the last bit of water out of the tank. Can<br clear="none">
anyone give me some advise here? I don't like the<br clear="none">
idea of water remaining in it long term.<br clear="none">
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Any advise would be greatly appreciated.<br clear="none">
<br clear="none">
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Thanks!<br clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
Bob<br clear="none">
<br clear="none">
Sent from my iPhone<br clear="none">
<br clear="none">
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