[PSUBS-MAILIST] Deepish test.

Tue Aug 16 11:00:18 EDT 2022

Antoine!  That is a proper test!

On Tue, 16 Aug 2022 at 12:53, Antoine Delafargue via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hello James
> Nice test! Indeed hard to find deep waters here in the Channel. And
> managing tidal currents is tricky.
> I had to go to the Mediterranean sea for my sub where I rented a barge for
> a few thousand euros with a crane to put the sub in the water and a winch
> to roll the cable holding the sub to -250m.
> The main issue there was bureaucratic, as I did the test close to the
> French nuclear attack submarine base.
>
> Regards,
> Antoine
>
> Le mar. 16 août 2022 à 09:56, James Frankland via Personal_Submersibles <
> personal_submersibles at psubs.org> a écrit :
>
>> Hi all,
>> Could have been condensation on the port.  I’m going to leave that for
>> now and just tackle the valve.
>>
>> With regards to cost.  I’ll take that off list with those interested.
>>
>> @cliff.  I totally agree that 1.25 x operating depth is the correct way
>> to test it.  But this is the best I can do.  I tried to take it to the
>> chamber in Aberdeen.  Had it all booked but then the day before I was to
>> leave, they said they wouldn’t do it as it’s home made and if it failed
>> might damage their equipment.  There are no lakes here and to get 100
>> meters in the ocean would take about a 4 hour trip just to get there and at
>> the price of the hire boat, I had to go closer in.
>>
>> I told them to get me as deep as they could.  We were in 60 meters of
>> water so I should really have been able to get a bit more.
>>
>> It will have to do.  I think as I got to 43 meters, plus the pressure
>> drop inside, I can dive confidently to 40.  There is a wreck I want to do
>> that is 30, so should be good for that.
>>
>> @rick.  The hatch was sealed with ratchet straps.  6 in total.  Plus a
>> pressure drop inside.  I tested the seal by removing the straps once the
>> pressure was dropped and trying to open the hatch.  I could not.
>>
>> Regards
>> James
>>
>>
>>
>> On Monday, 15 August 2022, Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> Great video James! I kept seeing dollar signs during the video, land
>>> craines and work boats. I saw a strap on the front of the hatch to secure
>>> it but didn't get a good look at the rear of the hatch.
>>> Rick
>>>
>>> On Mon, Aug 15, 2022 at 4:45 AM via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> Webb Maynard tested his K350 Lake Diver by diving it himself
>>>> incrementally, all the way to 500 feet. George had a stiff-neck down-East
>>>> hissy fit when he heard. Maynard just gave him one of those aw shucks grins
>>>> and said hey, all's well that ends well. And as rowdy as I got complaining
>>>> about it, the is exactly what Karl Stanley did, and he's made about a
>>>> jillion dives since with no problems. I'm not pointing any fingers here
>>>>  lads. Just sayin'.
>>>> Vance
>>>>
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Cliff Redus via Personal_Submersibles <
>>>> personal_submersibles at psubs.org>
>>>> To: via Personal_Submersibles <personal_submersibles at psubs.org>
>>>> Sent: Mon, Aug 15, 2022 9:37 am
>>>> Subject: Re: [PSUBS-MAILIST] Deepish test.
>>>>
>>>> Congratulations James.  Always great to see a successful depth
>>>> qualification test.  To sort out the leaky scuttle valve, I would build a
>>>> bench pressure test and retest after disassembly, inspection and repacking.
>>>>
>>>> As you note, K250 have seen much deeper depths than 50 m.  If it were
>>>> me, I would shoot for depth qualification of 1.25 times 250 ft operating
>>>> depth or 313 ft (95m).   As well built as your boat is, a depth
>>>> qualification to 95m should be no problem.
>>>>
>>>> As to small leak on viewport I am with Vance, I have a lot of
>>>> condensation on all my dives as I don't have on AC system.  I would make
>>>> sure this water was not fresh.
>>>>
>>>> Best
>>>>
>>>> Cliff
>>>>
>>>> PS: that was a serious tender boat you used for test.  If you don't
>>>> mind answering, what was the day rate on the boat?
>>>>
>>>>
>>>> On Monday, August 15, 2022 at 05:13:39 AM CDT, via
>>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>
>>>>
>>>> Congratulations, James. Was that seawater at the viewport? I didn't see
>>>> a taste test. Could simply have been condensation, yes? Good news, though.
>>>> Now you can sort that valve out and go diving. What a great way to end the
>>>> summer!!!
>>>> Vance
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: James Frankland via Personal_Submersibles <
>>>> personal_submersibles at psubs.org>
>>>> To: Personal Submersibles General Discussion <
>>>> personal_submersibles at psubs.org>
>>>> Sent: Mon, Aug 15, 2022 5:30 am
>>>> Subject: [PSUBS-MAILIST] Deepish test.
>>>>
>>>> Hi all.
>>>> I finally managed to do a deep test.  We get about 60 meters reasonably
>>>> close to land.  There are some deeper places but they are too far out to
>>>> sea to get to easily.
>>>> I was trying for 50 meters which is no where near what she should be
>>>> tested to I know, but it’s deeper than she has ever been or likely to go
>>>> from now on.
>>>> There was 40 meters of cable and 10 meters of strops, but the deck
>>>> length gobbled some up and they left a turn on the winch.  We drifted with
>>>> the tide for an hour with the sub at the end of the line.  It’s very flat
>>>> on the seabed where we were so nothing to crash into.
>>>> So in the end I got about 43meters.  I’m slightly disappointed I
>>>> couldn’t get to 50 but there we go.
>>>> The crew haven’t sent me the rov footage yet but when they do I will
>>>> modify the video to include it.  I couldn’t look at the footage as they
>>>> were doing it fearing the sight of a crushed sub coming into view.  I went
>>>> and hid on the bridge and tried to gauge the reaction of those looking at
>>>> it.....
>>>> Anyway, I’m not sure what to do with the weep on the viewport and
>>>> valve.  Reseat the port? Any ideas?
>>>> Regards
>>>> James
>>>> https://youtu.be/Wbjvgc7DBzM
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