[PSUBS-MAILIST] SeaQuestor Update Thru hull plates

[David Colombo via Personal_Submersibles]

Hi Alan. The plate with the bolts will be welded to the hull. The shoulder
bolts are 1/2" shoulder with 3/8" bolt threads.  The shoulder i had turned
down so it was 1000 over the hole diameter in the plate. These were pressed
in place. I dont expect that they will turn when the nuts are tightened.
There is no oring on the bolts. The rings are 6" od with a center 4 " id
hole. The exterior plate was turned so that there would be a 1/8" shoulder
just shy of the 4" id so that it will sit into the welded ring. The oring
is is about 4.25" od cut into the outer plate to seal the two plates.  Once
the two plates are bolted together, most likely they won't be unbolted
unless i change the configuration in the future.
Hope that helps. Once i get the blue globes in place it might be clearer.

David

On Sun, Mar 10, 2019, 6:46 PM Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi David,
> I'm a bit confused about how that is working! Is there an o-ring either
> side of the ring of bolts? Is there a small o-ring on each bolt?
> And what is being welded? Also if the bolts are press fitted how are they
> tightened.
> If it takes too much explanation I'll wait for the progress photos.
> Cheers Alan
>
>
> > On 10/03/2019, at 7:43 AM, David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> > Hi guys,
> > Just got all my 4" and 6" thru hull plates that I had fabricated for the
> SeaQuestor. I designed them with shoulder bolts machined down and press fit
> into the backing plate fit for future modificatations or bolt failure. The
> outside plates are machined down with a shoulder for alignment to the
> interior id and with an oring seal. Each plate will accomodate (5) 3/4"
> blue globe fittings. The center hole is for the carbon fiber air line to be
> routed to the thrusters for air compensatation. The 4" plates accomodate
> 1/2" blue globe fittings. Test fitted the 6" and I'm happy the
> accessability. Almost ready to send to the welder.
> > David
> > <Image8929769941362621995.jpg>
> > <Image6395510724994793785.jpg>
> > <Image6737230269000360952.jpg>
> > <Image8951598673576512608.jpg>
> > <Image6434648611577054239.jpg>
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