[PSUBS-MAILIST] vacuum packed

Wed Sep 4 04:53:25 EDT 2013

to be fair, my hatch can be opened from the outside, just not very
quickly.  The viewport is sealed with an O ring and is not glued in, so
someone could undo the bolts, pop out the lens and stick their hand in to
release the latches.  It would just take a bit of time, and need a
spanner.  Maybe i'll change them to wing nuts, that idea has potential.

regards
James

On 3 September 2013 20:00, greg cottrell <jgcottrell2002 at yahoo.com> wrote:

>  You're right about that, Hank. Sub pilots are a dime a dozen but nice
> domes are hard to find!
>
>
>
>
>   *From:* hank pronk <hanker_20032000 at yahoo.ca>
>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Tuesday, September 3, 2013 2:03 PM
>
> *Subject:* Re: [PSUBS-MAILIST] vacuum packed
>
>   Alan,
> I bet a lot of force, plus what about shrapnel hitting the pilot.  I think
> a saws all would do the trick.  Isn't there a rule in the submarine bible,
> thou shalt not wreck a perfectly good dome.
> Hank
>   *From:* Alan <alanlindsayjames at yahoo.com>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Tuesday, September 3, 2013 11:57:43 AM
> *Subject:* Re: [PSUBS-MAILIST] vacuum packed
>
>  I have seen small hammers hanging from the walls of
> Some pretty high tech trains recently. I presume they are for breaking the
> windows
> For exit in accidents. ( could be wrong ).
> How much effort would it take to break a K250 dome at it's apex?
> Alan
>
> Sent from my iPad
>
> On 3/09/2013, at 7:27 PM, "Smyth, Alec" <Alec.Smyth at covisint.com> wrote:
>
>   Well, that’s one I had to spend some thinking time on when PSUBS
> introduced the “convention diving prerequisite” that hatches open from
> either side. I eventually came to a solution that was jointly developed
> with Greg Cottrell. We put a bevel on the bottom outside edge of the dome,
> and sealed it with an O ring instead of potting it. The dome floats on a
> flat ring of polycarbonate lubricated with vacuum grease, and is secured
> only with wing nuts, so that in the event of needing to open the sub from
> the outside, that can be readily done without tools. It is not strictly
> speaking a hatch you can operate from either side, but it does accomplish
> the goal of emergency access. I investigated other options similar to
> they've Deep Worker system, but could not come up with anything that would
> work – the difference is that the Deep Workers have a massive hatch ring,
> which gives you a lot more to work with in terms of locating through-hulls
> or other hardware.
>
> Personally what I would explore is closing the hatch with shock cord, so
> that in the event of an emergency you could just lift the hatch a little
> and slice through the cords. But for that to work, you would really need
> nicely machined surfaces. Snoopy’s is not re-machined after fabrication,
> and therefore requires the clamp pressure for the two surfaces to conform
> and make a proper initial seal.
>
>
> Best,
>
> Alec
>
> *From:* Personal_Submersibles [
> mailto:personal_submersibles-bounces at psubs.org<personal_submersibles-bounces at psubs.org>]
> *On Behalf Of *vbra676539 at aol.com
> *Sent:* Tuesday, September 03, 2013 1:00 PM
> *To:* personal_submersibles at psubs.org
> *Subject:* Re: [PSUBS-MAILIST] vacuum packed
>
>  Finding a inside/outside hatch closure for Captain George's K-250 dome
> would be a real boon, in my view. It might not have to be quite Deepworker
> strong, as we aren't lifting the Ks by their hats, so to speak. But we
> could definitely do with something more user friendly.
>  Vance
>  -----Original Message-----
> From: Alan <alanlindsayjames at yahoo.com>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Sent: Tue, Sep 3, 2013 9:40 am
> Subject: Re: [PSUBS-MAILIST] vacuum packed
>   A while back Emile offered plans for his submarine.
>  Perhaps there is the option of adopting them over the K boat plans?
>  Alan
>
> Sent from my iPad
>
> On 3/09/2013, at 6:10 PM, James Frankland <jamesf at guernseysubmarine.com>
> wrote:
>
>  Well, its just an idea\thought.  Im not sure on the legalities of it,
> but if there was a Kboat replacement, id be happy to make a prototype and
> test it.  Otherwise i will probably make a new hatch anyway over the
> winter, seeing as i have the dish.
>  regards
>  James
>  On 3 September 2013 15:36, <vbra676539 at aol.com> wrote:
>  We'll need to get Jon in on this for liability considerations. That
> said, I think there might be a set of Perry drawings out there (although
> the hatches are heavier than we need) and aaI have an archive of the Nekton
> construction drawings that I'm looking for a way to apreserve. If the legal
> end doesn't bite us, then I'm sure we can figure how to adapt proven
> technology to our requirements, and then provide the result with the
> K-plans sold on the site.
>  Vance
>   -----Original Message-----
> From: James Frankland <jamesf at guernseysubmarine.com>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Sent: Tue, Sep 3, 2013 1:45 am
> Subject: Re: [PSUBS-MAILIST] vacuum packed
>   Agree strongly with Vance here, the standard K hatch is rubbish.  If
> anyone wants to chip in any ideas for a "club design" i'm happy to make it
> over the winter.  I have a spare dish which was left over from the endcap
> hole II cut out.  Its just the right size, dished and 13mm thick.
>
>  Otherwise im probably going to make one anyway (once ive put in a new
> kitchen at home.. :)
>  Kind Regards
>  James
>
>
>  >I do think it would serve us well for someone to design a K-hatch
> >modified with thru-hatch closure. It is truly nutty to bolt ourselves into
> a sub >without some way for someone on the outside to help us, should we
> need >it. Maybe something for the next conference?
>
>  >Vance
>
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