[PSUBS-MAILIST] Deepish test.

Wed Aug 17 10:41:52 EDT 2022

James well done. I am always impressed with your willingness to spend money.   
Hank

Sent from my iPhone

> On Aug 16, 2022, at 9:01 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> 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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