[PSUBS-MAILIST] Fwd: hemi heads

Sun Nov 8 19:03:55 EST 2015

The external gauges are likely for the hydraulic system (pump, manipulators, etc.) pressures, as these would have no reason to be plumbed into the personnel sphere, and would represent a risk of contaminating the atmosphere in the event of a leak / spill. 

I did a lot of ROV projects in which mechanical gauges were similarly placed within a camera field of view. Much simpler and cheaper to piggyback on the video versus signal conditioning a transducer and sending that measurement separately up an umbilical.

Sean

On November 8, 2015 4:51:14 PM MST, Pete Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>Hank, Please check out those external gauges.
>
>Pete
>--------------------------------------------
>On Sun, 11/8/15, Keith Gordon via Personal_Submersibles
><personal_submersibles at psubs.org> wrote:
>
> Subject: [PSUBS-MAILIST] Fwd:  hemi heads
>To: "Personal Submersibles General Discussion"
><personal_submersibles at psubs.org>
> Date: Sunday, November 8, 2015, 5:25 PM
> 
> As discussed
> Hank have removed one image to reduce to 418 KB - will see
> how this goesKeith 
> Begin forwarded message:
> From:
> Keith
> Gordon <searov at xtra.co.nz>
> Subject:
> Re:
> [PSUBS-MAILIST] hemi heads
> Date:
> 9 November
> 2015 9:34:32 AM NZDT
> To:
> Personal
> Submersibles General Discussion <personal_submersibles at psubs.org>
> 
> Hi Hank
> Maybe of interest - I have attached some pix of
> Pisces 8 without her clothes on - 
> Cheers Keith Gordon
> On 9/11/2015,
>at 5:17 AM, hank pronk via Personal_Submersibles
><personal_submersibles at psubs.org>
> wrote:
> 
> Sean,By
> all means, anyone is welcome to any drawings I obtain or map
> from the Pisces.    I actually already
> have material price to machine the hatch from a solid disk
> of 516-70N  this way it is one piece with no welds.
>  I just need the drawing first to order the
> disk.Hank
>  
> 
> 
>      On Sunday, November
> 8, 2015 8:52 AM, Sean T. Stevenson via Personal_Submersibles
> <personal_submersibles at psubs.org>
> wrote:
>     
> 
>  I'd be
> interested in having a look at those drawings.  The
> idea with a
> conical bearing face on a hatch,
> if you are not trying to establish a
> metal-to-metal seal, is to provide a load path
> through the hatch itself
> to carry the shell
> stress that would otherwise require heavy
> reinforcement around the hole.  Thus, the
> "ideal" hatch would be the
> same
> thickness and curvature as the shell it is replacing,
> aligned to it
> so the load transfers straight
> through, with a flange on both the hatch
> and
> shell parts to create a substantial bearing face.  The
> conical angle
> in that case would be set by
> the hatch diameter, as the ideal interface
> angle would be perpendicular to the shell at
> every point.  I suspect
> that in
> practice, the cone is exaggerated beyond that, because
> we're
> talking about very small angles on
> larger spheres - on a PSub, perhaps
> it is
> more important.  The other advantage is of course the
> self-centering.
> 
> Sean
> 
> 
> On 2015-11-07
> 16:26, hank pronk via Personal_Submersibles wrote:
> > Dr Nuytten thinks he has detail drawings
> that he is willing to share
> > with me, if
> he can not find them, he has given me permission to
> measure
> > one of his Pisces in the bone
> yard.   I may have a look for myself even
> > with drawings, just because I am a visual
> guy- if I see it I can make
> > it.  
> Besides, how fun is a day at the Nuytco bone yard :-)
> > Hank 
> 
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