[PSUBS-MAILIST] Fwd: hemi heads

Mon Nov 9 06:32:33 EST 2015

Unknown. Interesting though. Hmm.
Vance

-----Original Message-----
From: Pete Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Mon, Nov 9, 2015 12:21 am
Subject: Re: [PSUBS-MAILIST] Fwd:  hemi heads

What are the other gauge shaped things
?

Pete
--------------------------------------------
On Sun, 11/8/15, via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re:
[PSUBS-MAILIST] Fwd:  hemi heads
 To: personal_submersibles at psubs.org
 Date:
Sunday, November 8, 2015, 8:07 PM

 i assume you mean the gauge shape on the
outboard
 edge of the pilot's viewport (port side). That isn't
 a gauge. It is
a mechanical (push pull cables) thruster
 angle indicator.
 Vance

 -----Original Message-----

 From: Sean T. Stevenson via
Personal_Submersibles
 <personal_submersibles at psubs.org>

 To: Personal
Submersibles General Discussion
 <personal_submersibles at psubs.org>

 Sent:
Sun, Nov 8, 2015 7:04 pm

 Subject: Re: [PSUBS-MAILIST] Fwd:  hemi heads

 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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