[PSUBS-MAILIST] K-250 side viewport and dome hatch.

[David Colombo via Personal_Submersibles]

Alan, on the VAST sub which has the original kitteridge dome, it has a  .5
inch wide flat rubber seal that appears to also have a seat groove into the
hatch ring. The hatch is clamped with (4) internal dogs. The rubber seal
protrudes about 3/16".
David.


On Sun, Sep 27, 2020, 5:11 PM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Philipe,
> You have to machine the dome seat flat anyways, so adding an o-ring groove
> is a small extra step.
> Hank
>
> On Sunday, September 27, 2020, 4:36:22 PM MDT, Alan via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi Philipe,
> I don't know of any submersibles that don't use o-rings as the hatch
> sealing method.
> I believe there is a danger of a flat rubber seal extruding inward under
> pressure.
> Alan
>
>
> On 28/09/2020, at 10:32 AM, Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Follow the plans.  The sections you reference are all related to the
> pressure hull and should not be modified.
>
> Jon
>
>
> On Sunday, September 27, 2020, 04:47:54 PM EDT, Philippe Robert via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi all,
>
> I currently make the conning tower. I see on the internet some k-250 with
> front and side viewport in addition of the acrylics dome. Some of the
> viewport is close to the gusset and I assume that is not possible to do a
> 100% weld. Is it acceptable ? Is it ok to drill hole in the viewport to put
> retaining bolts ?  Second question, on the blueprint, the sealing option
> for the hatch on the conning tower is o'ring groove. Is it possible to make
> better sealing like flat rubber strip or something like that ?
>
> Best regards,
>
> Philippe
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