<div dir="ltr">Sorry, let me explain further. I don't mean air compensation. I mean just permanently pressurize them. If you wish, mount a mini air gauge so you know they are still pressurized. Now that I do think was a Hank idea a while back... </div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 2, 2018 at 8:48 AM, Alec Smyth <span dir="ltr"><<a href="mailto:alecsmyth@gmail.com" target="_blank">alecsmyth@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Pressurize them with air!</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 2, 2018 at 8:45 AM, James Frankland via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi,</div><div><br>Cant seal them up, they are only 2mm thick. They wouldn't survive.</div><div><br></div><div>Im starting to re-think this idea now. I might be doing a lot of work for little benefit and it might not work. I don't think the plumbing is going to work if I pipe it to the tower. There will always be a potential air lock scenario. Valves would have to go on the tanks themselves.</div><div><br></div><div>What about this? 1 mechanical penetrator into the tank, and home made mushroom\vent valves. failing this, I think I might stick as I am and make them into an extraction system for the shop! I could always attach some temporary floats for towing. </div><div><br></div><div><img width="562" height="162" src="cid:ii_jd5ze5tq0_16156c2ded217d0f"><br></div><div><br></div><div><br></div><div> </div></div><div class="m_7610175821256533293HOEnZb"><div class="m_7610175821256533293h5"><div class="gmail_extra"><br><div class="gmail_quote">On 2 February 2018 at 13:03, hank pronk via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div>Alec,</div><div>That was not my idea, it was Alan's.</div><div>Hank</div><div><br></div>
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On Friday, February 2, 2018, 5:01:08 AM MST, Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote:
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</span><div><div id="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788"><div><span><div dir="ltr">Hi James,<div><br clear="none"></div><div>If they are just for surface stability, I think Hank has the best idea... just seal them up and forget the moving parts! If I might add to that, I would make up a few steel rounds that weigh the same as the net buoyancy of those tanks. Put the steel rounds inside the battery pods, in the interstices left by a rectangular battery in the round tube. You will find they wedge down nicely at a very low point in the sub, and will give you as much righting moment as the tanks. Pick rounds of an appropriate diameter so they're too big to pass between the TOP edge of the battery and the pod, that way they can't bounce up and short out the battery posts.<div><br clear="none"></div><div>Best,</div><div>Alec</div></div></div></span><div class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788yqt7536717915" id="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788yqt88688"><div class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788gmail_extra"><br clear="none"><div class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788gmail_quote"><span>On Fri, Feb 2, 2018 at 5:35 AM, James Frankland via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" rel="nofollow" shape="rect" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>></span> wrote:<br clear="none"></span><blockquote class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788gmail_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"><span>Hi All,<br clear="none">
<br clear="none">
Thanks for the advice. The tanks are simply for surface stability and<br clear="none">
better towing ability.<br clear="none">
<br clear="none">
I think I will simply pipe the tanks to two Kittredge style valves in<br clear="none">
the conning tower. The same as the main tanks.<br clear="none">
<br clear="none">
With vents at the for and aft of the tanks, hopefully any bubble will<br clear="none">
vanish reasonably quick. I will put 3/4 inch pipe.<br clear="none">
<br clear="none">
I might put deck plates on as well. We'll see.<br clear="none">
<br clear="none">
Starting tomorrow......<br clear="none">
<br clear="none">
Many thanks<br clear="none">
James<br clear="none">
<br clear="none">
On 1 February 2018 at 18:54, Steve McQueen via Personal_Submersibles<br clear="none">
</span><div class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788HOEnZb"><div class="m_7610175821256533293m_2556022047033363694m_-4006116352979730487yiv6362509788h5"><span><<a href="mailto:personal_submersibles@psubs.org" rel="nofollow" shape="rect" target="_blank">personal_submersibles@psubs. org</a>> wrote:<br clear="none">
> James, When you do mount, like others have said, ensure the mounting attachments are beefy enough you can also support some decking with these mounts (if you want). I have similarly placed variable ballast tubes on my K-250 that will also be used to support my decking.<br clear="none">
><br clear="none">
> For improved stability I am also considering adding some smaller saddle tanks in the future in conjunction to the variable ballast tubes I have.<br clear="none">
> I think for this application Alec's arrangement on Snoopy (1 mech. thru hull in tower) was clean and simple. I anticipate I will do the same.<br clear="none">
><br clear="none">
> I have attached a couple of photos.<br clear="none">
><br clear="none">
> Thanks,<br clear="none">
> Steve<br clear="none">
><br clear="none"></span><span>
> ---- James Frankland via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="nofollow" shape="rect" target="_blank">personal_submersibles@psubs. org</a>> wrote:<br clear="none">
>> Hi All,<br clear="none">
>><br clear="none">
>> I am adding saddle tanks to Jodie B.<br clear="none">
>><br clear="none">
>> Im not 100% sure what to do with regards to the vent plumbing. I would<br clear="none">
>> like to ask if anyone has any advice?<br clear="none">
>><br clear="none">
>> I am thinking of putting 2x through hulls on the top of the main pressure<br clear="none">
>> hull. For and aft of the tower and then piping the vents to a valve that<br clear="none">
>> would operate through them. Similar to the existing vents.<br clear="none">
>><br clear="none">
>> OR, fit the through hulls at the side so they penetrate the tanks and have<br clear="none">
>> a linkage of some sort that operates valves attached to the top of each<br clear="none">
>> tank, for and aft. Some sort of mushroom valve??<br clear="none">
>><br clear="none">
>> Any ideas? What have other people done?<br clear="none">
>><br clear="none">
>><br clear="none">
>><br clear="none">
>><br clear="none">
><br clear="none">
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