[PSUBS-MAILIST] Mushroom Valve?

Fri Feb 2 08:50:26 EST 2018

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...

On Fri, Feb 2, 2018 at 8:48 AM, Alec Smyth <alecsmyth at gmail.com> wrote:

> Pressurize them with air!
>
> On Fri, Feb 2, 2018 at 8:45 AM, James Frankland via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
>
>> Hi,
>>
>> Cant seal them up, they are only 2mm thick.  They wouldn't survive.
>>
>> 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.
>>
>> 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.
>>
>>
>> 
>>
>>
>>
>>
>> On 2 February 2018 at 13:03, hank pronk via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> Alec,
>>> That was not my idea, it was Alan's.
>>> Hank
>>>
>>> On Friday, February 2, 2018, 5:01:08 AM MST, Alec Smyth via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>
>>> Hi James,
>>>
>>> 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.
>>>
>>> Best,
>>> Alec
>>>
>>> On Fri, Feb 2, 2018 at 5:35 AM, James Frankland via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>> Hi All,
>>>
>>> Thanks for the advice.  The tanks are simply for surface stability and
>>> better towing ability.
>>>
>>> I think I will simply pipe the tanks to two Kittredge style valves in
>>> the conning tower.  The same as the main tanks.
>>>
>>> With vents at the for and aft of the tanks, hopefully any bubble will
>>> vanish reasonably quick.  I will put 3/4 inch pipe.
>>>
>>> I might put deck plates on as well.  We'll see.
>>>
>>> Starting tomorrow......
>>>
>>> Many thanks
>>> James
>>>
>>> On 1 February 2018 at 18:54, Steve McQueen via Personal_Submersibles
>>> <personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
>>> wrote:
>>> > 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.
>>> >
>>> > For improved stability I am also considering adding some smaller
>>> saddle tanks in the future in conjunction to the variable ballast tubes I
>>> have.
>>> > 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.
>>> >
>>> > I have attached a couple of photos.
>>> >
>>> > Thanks,
>>> > Steve
>>> >
>>> > ---- James Frankland via Personal_Submersibles <personal_submersibles at psubs.
>>> org <personal_submersibles at psubs.org>> wrote:
>>> >> Hi All,
>>> >>
>>> >> I am adding saddle tanks to Jodie B.
>>> >>
>>> >> Im not 100% sure what to do with regards to the vent plumbing.  I
>>> would
>>> >> like to ask if anyone has any advice?
>>> >>
>>> >> I am thinking of putting 2x through hulls on the top of the main
>>> pressure
>>> >> hull.  For and aft of the tower and then piping the vents to a valve
>>> that
>>> >> would operate through them.  Similar to the existing vents.
>>> >>
>>> >> OR, fit the through hulls at the side so they penetrate the tanks and
>>> have
>>> >> a linkage of some sort that operates valves attached to the top of
>>> each
>>> >> tank, for and aft.  Some sort of mushroom valve??
>>> >>
>>> >> Any ideas?  What have other people done?
>>> >>
>>> >>
>>> >>
>>> >>
>>> >
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>>> >
>>>
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>>
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