[PSUBS-MAILIST] hemi heads

Mon Nov 9 15:32:47 EST 2015

Hank

I was involved with Salvage Pacific Ltd who back in the 80's were developing remote operated systems and ROV technology to recover cargo from shipwrecks that were in deeper water - this included a Palfinger hydraulic crane converted to work remotely controlled in 2000 ft depths. A project we started on was a wreck in 1800ft down a coral reef slope some 200 miles out from Townsville, Australia which was carrying a cargo of zinc ingots worth considerable money at that time. We borrowed the Pisces off Sverker Halstrom and shipped it down from Singapore and loaded it aboard our salvage vessel in Australia having been told it was operational and ready to go. We then found it had not been in water for some 10 years so I spent the next 6 weeks or so decommissioning the sub which was a task especially in the heat and being out at sea in a remote lagoon. Cut a long story short we got the sub in the water and carried out test dives in the lagoon - in the clear tropical water was like flying an airship around the reefs -  then started to prepare it for deep dives to the wreck site - but 1991 there was the financial crash, the banks got nervous and pulled the plug on support for our operation - probably a good thing before we started deep dives. I later visited the yard in Singapore where sub was again stored in open, I found the hatch had been left open and in the monsoon rains the sphere had filled with water - at least it was rainwater!  Sorry to see after all my hard work in those conditions  - but at least it has a good retirement home now in Phil's yard with other friends. As said give her a pat on the backside for me when you visit.

Keith G

On 9/11/2015, at 2:03 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

> Kieth,
> What a great story, how were you involved with this sub.  You lucky duck!
> Hank
> 
> 
> 
> On Sunday, November 8, 2015 5:53 PM, Keith Gordon via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> One more Hank of her in the water after a test dive after 10 years or more out of the water I'm the guy in the red shirt happy we survived! - these photos were taken in 1991 - no doubt you will see her when you visit Phil's bone yard - give her a pat from me
> Cheers
> Keith
> 
> 
> 
> 
> On 9/11/2015, at 12:57 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
>> Kieth,
>> Nice pictures, what a beauty with her clothes off ;-)  
>> Pete 
>> Will do, I will take lots of pictures.
>> Hank
>> 
>> 
>> 
>> On Sunday, November 8, 2015 4:51 PM, 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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