[PSUBS-MAILIST] SeaQuestor Update Thru hull plates

[Alan via Personal_Submersibles]

Thanks David,
still not quite getting it but will wait for the next pictures.
Was a bit concerned that water could leak through the bolt's press fit, but
I guess you could weld them or cover them with expoxy.
Cheers Alan

> On 11/03/2019, at 4:28 PM, David Colombo via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 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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>> 
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