[PSUBS-MAILIST] Main Ballast Vent "T".

[Alec Smyth via Personal_Submersibles]

This is interesting because the K350 and K250 have virtually the same
design in this respect, but I can't induce this problem even on purpose. If
I flood one tank 100% and only then start flooding the other, so that the
boat feels like she's standing on her head, I still don't get a bubble
block. Well... no complaints! But I'm looking at it carefully because I'm
following the K design on the new boat as its worked well for me.

Best,

Alec

On Thu, Jul 30, 2015 at 4:44 PM, Hugh Fulton via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi James,
>
> I had a similar problem with the Comsub.  When it gets a bubble the vent
> is in the wrong place.  Centralised venting can create problems.  I am
> going localized pilot operated venting.
>
> Regards,  Hugh
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *James Frankland
> via Personal_Submersibles
> *Sent:* Thursday, 30 July 2015 8:46 p.m.
> *To:* Personal Submersibles General Discussion
> *Subject:* Re: [PSUBS-MAILIST] Main Ballast Vent "T".
>
>
>
> Hi Hugh,  Drawing is not to scale or anything, it was just to give you an
> idea.  Anyway, its going in this weekend.  I know where the bubble is.  I
> think maybe my tanks are not as steep a profile as original Kittredge
> ones.  Maybe that's why I get the bubble.  Anyway, im pretty sure this will
> cure the issue.
>
>
>
> Regards
>
> James
>
>
>
> On 29 July 2015 at 21:58, Hugh Fulton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi James.
>
> Turn your drawing at the angle you think you want, draw a line horizontal,
> then see if the outlet is above the bubble.
>
> Hugh.
>
>
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *James Frankland
> via Personal_Submersibles
> *Sent:* Thursday, 30 July 2015 1:11 a.m.
> *To:* Personal Submersibles General Discussion
> *Subject:* [PSUBS-MAILIST] Main Ballast Vent "T".
>
>
>
> Hi All,
>
>
>
> Im going to T in another vent pipe into my main ballast tank at the back.
> Unless I submerge perfectly straight, I get a bubble stuck in either the
> front or rear tank.
>
>
>
> If I T in this vent extension to the existing line, I can dive nose first
> and still get the bubble out.  I cant see anything wrong with this, but I
> though id ask in case anyone has any thoughts?
> Thanks
>
> James
>
>
>
>
> ​
>
>
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>
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