[PSUBS-MAILIST] Mushroom Valve?

[Alec Smyth via Personal_Submersibles]

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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