.47 millisecond, or .47 seconds?

bp
<part15sbs{at}gmail{dot}com>

On 6/22/2023 3:30 PM, Chuck McCown via AF wrote:
The USS Thresher implosion was recorded by hydrophone.
.47 millisecond
Instant deviled ham.
*From:* Daniel Pautz via AF
*Sent:* Thursday, June 22, 2023 2:03 PM
*To:* AnimalFarm Microwave Users Group
*Cc:* Daniel Pautz
*Subject:* Re: [AFMUG] This thing on?
Well the CEO hotshot was on board.  I predct this company goes poof very quickly.
------------------------------------------------------------------------
*From:* AF <af-boun...@af.afmug.com> on behalf of dmmoff...@gmail.com <dmmoff...@gmail.com>
*Sent:* Thursday, June 22, 2023 11:28:33 AM
*To:* 'AnimalFarm Microwave Users Group' <af@af.afmug.com>
*Subject:* Re: [AFMUG] This thing on?
The claim from the ex operations director is he told management that non-destructive pressure testing was necessary and management felt that such testing was impossible. He also talks about visible flaws in the carbon fiber which could expand into tears as the hull cycles between low and high pressure. He also alleges that the vendor for the viewing bubble only certified it to 1300m depth, whereas they intended to use the vessel at up to 4000m.

If any of those claims are true those guys may be getting sued by the families of 4 zillionaires.


-----Original Message-----
From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince
Sent: Thursday, June 22, 2023 12:19 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] This thing on?

Carbon fiber is not the same as fiberglass. I believe they pressure tested the vessel to ~~ 6,200 PSI (roughly 14,000' depth).

That said, if something goes wrong at that kind of pressure (~~ 5,400 PSI), the failure would be measured in milliseconds.


bp
<part15sbs{at}gmail{dot}com>

On 6/22/2023 8:34 AM, Chuck McCown via AF wrote:
> Water pressure at 12,500' is something like 5400 psi.  There is a lot
> of area on that tube.  Who trusts essentially fiberglass to withstand
> 5400 psi? If it was a pressure vessel it is one thing, but this is
> essentially a vacuum inside the tube, the forces pushing on it are not
> pulling on those fibers.  The tiniest non symmetry in shape would be
> no bueno.
>
> -----Original Message----- From: dmmoff...@gmail.com
> Sent: Thursday, June 22, 2023 7:02 AM
> To: 'AnimalFarm Microwave Users Group'
> Cc: ch...@go-mtc.com
> Subject: RE: [AFMUG] This thing on?
>
> I read a commentary today saying the hull was made of titanium and carbon
> fiber.
>
> An Operations Director for the manufacturer delivered a quality control
> report saying that the carbon fiber hull carried a risk of small defects
> expanding into major failures under pressure. They were relying on an
> acoustic fault detection system that was supposed to alert the pilot if
> there were sounds indicating stress in the hull.  That Operations
> Director
> said you'd have a matter of milliseconds between that alert system
> going off
> and a catastrophic failure.  He'd expressed those concerns verbally
> and was
> ignored, so he delivered that report to senior management in 2018 to
> create
> a written record of his concerns, and was immediately fired.  Then he
> took
> his report to OSHA, there was a lawsuit about divulging company
> information
> or some such.  Lawsuit settled later that year, OSHA didn't take any
> action
> against the manufacturer.  I'd bet a nickel that OSHA doesn't have
> specific
> rules for submarines, and without any rules to follow they don't have
> enough
> knowledge to assess whether one is actually safe.
>
>
>
> -----Original Message-----
> From: AF <af-boun...@af.afmug.com> On Behalf Of Chuck McCown via AF
> Sent: Wednesday, June 21, 2023 7:32 PM
> To: AnimalFarm Microwave Users Group <af@af.afmug.com>
> Cc: ch...@go-mtc.com
> Subject: Re: [AFMUG] This thing on?
>
> What a horror show.  There were so many ways they could have improved
> their
> chances at survival.  Supposedly dissolvable straps should have
> dropped sand
> ballast by now.  They had a way to mechanically drop steel ballast.
> And a
> inflatable bladder.
>
> Why not a power and comm tether to the mother ship?  I realize it is
> 12,500'
>
> of cable but fiber optics are pretty much neutrally buoyant.
>
> But no underwater pinger.  No ELT.  How about a sat tel or VHF radio.
> Some
> kind of way to talk to the world.  No high pressure air to blow tanks.  I
> would have wanted explosive bolts on the hatch if there was no other
> way to
> get out.  But why not some kind of fresh air intake assuming you could
> surface.  This haunts my sleep.
>
> -----Original Message-----
> From: Bill Prince
> Tryin' to get my ass outa this cramped submarine.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 6/21/2023 3:10 PM, Steve Jones wrote:
>> Errbody dead?
>>
>

--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com


--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com

------------------------------------------------------------------------
--
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- 
AF mailing list
AF@af.afmug.com
http://af.afmug.com/mailman/listinfo/af_af.afmug.com

Reply via email to