[PSUBS-MAILIST] Mushroom Valve?

Fri Feb 2 09:19:21 EST 2018

hmm, I might crash into the pontoon and explode!.  Im thinking now of just
strapping a couple of floats on for better towing and leave it.   Then get
on with the new boat...

On 2 February 2018 at 13:50, Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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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>>>> <http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles>
>>>> >
>>>>
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>>>
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>>
>
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