[PSUBS-MAILIST] Build Updates

Tue Jan 5 12:45:51 EST 2021

Great Video James. Are you going to sell Jodie B?

Rick

On Tue, Jan 5, 2021 at 7:26 AM Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> That was a super video! It's not everyday sub builders manage to get humor
> into them.
>
> Alec
>
> On Tue, Jan 5, 2021 at 12:00 PM James Frankland via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi All
>>
>> We are very lucky at the moment here in Guernsey where we do not have any
>> restrictions due to Covid.  We do not have any cases in the wild.  So, i
>> have been able to do a couple of dives last summer.
>>
>> Currently continuing with the rebuild of Skadoc.  Slow progress, but i am
>> on the go now each week with no other non sub related projects getting in
>> the way.  Also doing my vlog to record progress.  A bit short on content
>> for now, but getting there and i am trying to get better at the video
>> editing etc.
>>
>> https://www.youtube.com/watch?v=RGJo0Iv2nAU
>>
>> Battery pod 2 is nearly complete and I am building a gantry to get Skadoc
>> lifted enough to get the pods on.  Then i should be getting somewhere.
>> Just thrusters, engine, ballast, drop weights, kitchen sink to go.
>>
>> Ive also ordered a new trailer to replace the gigantic one that Jodie B
>> sits on and takes up half my workshop.  Been waiting 4 months for delivery
>> due to Covid.
>>
>> All the best
>> James
>>
>>
>>
>>
>> On Tue, 5 Jan 2021 at 15:24, Steve McQueen via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> My K-250, "The Great Escape '', came away from it's first trials with an
>>> understanding of it's fresh water weight adjustments for neutral buoyancy
>>> trim.  A list of 11 sub and 5 trailer items that needed
>>> attention/improvement was also identified and are partially completed. I am
>>> also working on checklists and procedures as a result of lessons learned.
>>>
>>> I anticipate more local testing this spring to verify resolution of
>>> these identified issues followed by incremental depth tests. Depth testing
>>> will be followed by an upgrade of the thrusters and motor controllers
>>> bringing the sub to a fully operational status.
>>>
>>> Once operational I am planning to spend some extended time exploring @:
>>> http://www.michiganpreserves.org/whitefish.htm
>>>
>>> I am also outfitting a 26' support boat to act as a tow vehicle and
>>> operational platform for near shore diving operations.
>>>
>>> In addition I am planning to add to my podcast topics in 2021 interviews
>>> with members to discuss their design philosophies and individual projects.
>>>
>>> Steve
>>>
>>>
>>>
>>>
>>> On Mon, Jan 4, 2021 at 12:35 PM Cliff Redus via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> 2020 is in our rear view mirrors and 2021 is upon us.  I would love to
>>>> hear a short update on Psub community builds. I have heard bits and pieces
>>>> on a number of builds but would love an update from members on progress.
>>>>  I know Jon Wallace is working away on his boat electronics and his
>>>> trailer.  Jon, where are you overall on the build?  Alec has Shackleton
>>>> ship shape and has a new articulated arm to play with.  I think he is
>>>> pretty far along on a 2021 InnerspaceScience.org 2021 Expedition.  Alec,
>>>> any updates?  Gary Boucher has retired from LSU faculty and is busy on a
>>>> retrofit of Vindicator.  He is changing out the drive train to articulated
>>>> Minn Kotta thrusters, putting the boat on a diet to drop weight and
>>>> rebuilding the electronics.  Gary what else have you planned for
>>>> Vindicator?  Alan has been busy on custom thrusters for his boat.  Alan,
>>>> what the status on the thrusters and what else you been up to.  David
>>>> Colombo, how is SeaQuestor coming along?  What's next?  And were are you on
>>>> getting your new boat ready to dive?    Carstan, Emile, what's new with
>>>> your boats?  I was sorry that Covid 19 wiped out the European Psub events
>>>> you guys had planned.  Judging by the PSub list traffic, it sound like Rick
>>>> Patton is getting close so sea trials on his new boat.  Rick, can you give
>>>> us an update.  I know Steve McQueen has been busy digesting the learnings
>>>> from his first dive of The Great Escape last summer.  Steve, what's new
>>>> with The Great Escape? When does she go back in the water? Brian Cox I know
>>>> has been busy.  We have all been enjoying his video post of dunk test on
>>>> his boat.  Brian, what's the latest?  I know that Hugh Fulton is back on
>>>> QSub with a new electrical guy on board that is bringing some energy to the
>>>> build.  Hugh, any updates on QSub?  New Zealand in the summer might be fun!
>>>>
>>>> New year is time for goal setting and planning.  I for one would love
>>>> to know what the member community is up to.  Jon, any thoughts on the 2021
>>>> PSub Convention?  I think we should move forward on this with the
>>>> anticipation that the Convid 19 vaccinations will be successful and at some
>>>> point we will regain a degree of normalcy.  What about Islamorada Florida
>>>> this summer or fall?
>>>>
>>>> I will give you a brief update on my Psub work.  The R300 is fully
>>>> operational and I am just waiting for the dive season to start.  I changed
>>>> out the pressure compensation on the thursters from air to oil so am
>>>> anxious to see how the thursters work.   I have also started design work on
>>>> a new boat I am designating the R800.  It is a low cost atmospheric diving
>>>> suit (ADS). The design depth of the boat is 800 feet.  I am trying to make
>>>> it ABS compliant as much as possible.  Preliminary engineering is almost
>>>> done.  Weight and balance calcs as well as preliminary FEA work on hull and
>>>> pods are done.  Am currently working on detailing the electrical boxes and
>>>> hull penetrations.  Alec build a OP valve for me that I am currently
>>>> testing to document it's cracking pressure and overall depth rating.  I
>>>> hope to complete detail engineering by this summer time and start the build.
>>>>
>>>> Cliff
>>>>
>>>>
>>>>
>>>>
>>>> On Sunday, January 3, 2021, 03:40:59 PM CST, via Personal_Submersibles <
>>>> personal_submersibles at psubs.org> wrote:
>>>>
>>>>
>>>> Alan,
>>>>
>>>>
>>>>
>>>> Axial scrubber, radial fan..
>>>>
>>>>
>>>>
>>>> Emile
>>>>
>>>>
>>>>
>>>> *Van:* Personal_Submersibles <personal_submersibles-bounces at psubs.org> *Namens
>>>> *Alan James via Personal_Submersibles
>>>> *Verzonden:* maandag 28 december 2020 19:41
>>>> *Aan:* Cliff Redus via Personal_Submersibles <
>>>> personal_submersibles at psubs.org>
>>>> *Onderwerp:* Re: [PSUBS-MAILIST] Scrubber design and materials
>>>>
>>>>
>>>>
>>>> Following this discussion with interest.
>>>>
>>>> Emile I thought had an axial type scrubber
>>>>
>>>> that held something like 10lb of absorbent.
>>>>
>>>> This would require a lot more power to move the air through maybe 1ft
>>>> of absorbent, whereas David has a radial scrubber that only needs to push
>>>> air through a 2" section of absorbent. Some good thoughts on power
>>>> consumption under load Cliff. I wonder if the load increases as the
>>>> absorbent is spent & becomes more soggy. Ie. is there more of a load toward
>>>> the end of the dive than at the beginning.
>>>>
>>>> I am wanting to go with 2 smaller axial scrubbers, mainly to keep the
>>>> size down. Am thinking of using an oversized axial fan to keep the noise
>>>> down, and have automated speed control based on the CO2 level.
>>>>
>>>> Alan
>>>>
>>>>
>>>>
>>>> On Tuesday, December 29, 2020, 04:39:29 AM GMT+13, Cliff Redus via
>>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> The squire gage blower I use on the R300 scrubber is similar the one
>>>> Emile has posted.  DC FLATPAKS.qxp (octopart.com)
>>>> <https://datasheet.octopart.com/RL90-18-24-EBM-Papst-datasheet-68360.pdf>
>>>>
>>>>
>>>>
>>>> Model Papst RL90-18/14N
>>>>
>>>> Voltage 12-28VDC
>>>>
>>>> Power 5W
>>>>
>>>> Noise 58dBA
>>>>
>>>> Current  .21A
>>>>
>>>> Air flow  24CFB  at 0 in H20 differential pressure
>>>>
>>>>
>>>>
>>>> Note that the flow rate through these fans/blowers are given at 0
>>>> differential pressure.  You would need to look at the head curve on the
>>>> datasheet to determine the actual flowrate through the fan/scrubber.  It
>>>> would be substantially reduced due to the pressure drop through the CO2
>>>> absorbent section.   Also to meet ABS rules, you need to size this unit so
>>>> the that the current draw is not so great as to pull the emergency battery
>>>> down before reaching 72 hours of life support.  On my boat, the hotel load
>>>> is about 1.5 amps (life support and comms only).  The emergency battery has
>>>> a capacity of 110 Ah at 24V so a 1.5A hotel load will last 73 hours.  I did
>>>> a garage test to confirm.
>>>>
>>>>
>>>>
>>>> Cliff
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Sunday, December 27, 2020, 11:39:56 PM CST, David Colombo via
>>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Hi Brian, here is the data on the fan. I havent ran any tests yet to
>>>> see if the watts rating are at full speed. I am adding a dimmer circuit as
>>>> well.
>>>>
>>>>    - Rated Voltage: 12V
>>>>    - Rated Current: 1.0A
>>>>    - Connecter: XH2.54-2Pin
>>>>    - Power: 11W
>>>>    - Speed: 3000RPM
>>>>    - Air flow:38.5CFM
>>>>    - Noise:45dBA
>>>>
>>>> David
>>>>
>>>> On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles <
>>>> personal_submersibles at psubs.org> wrote:
>>>>
>>>> David,          How many watts is the scrubber motor?
>>>>
>>>>
>>>>
>>>> Brian
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --- personal_submersibles at psubs.org wrote:
>>>>
>>>> From: David Colombo via Personal_Submersibles <
>>>> personal_submersibles at psubs.org>
>>>> To: Personal Submersibles General Discussion <
>>>> personal_submersibles at psubs.org>
>>>> Subject: [PSUBS-MAILIST] Scrubber design and materials
>>>> Date: Sun, 27 Dec 2020 16:17:51 -0800
>>>>
>>>> Hi Guys, just completed my scrubber for the VAST sub. Its capacity is
>>>> right at 3lbs, based on my rice test. I see I can purchase soda sorb online
>>>> but was wanting recommendations on where to purchase it or the draeger
>>>> product. Since this is my first scrubber, I have no experience with the
>>>> different products.
>>>>
>>>> David
>>>>
>>>> --0000000000001615f605b77b35d0--_______________________________________________
>>>> Personal_Submersibles mailing list Personal_Submersibles at psubs.org
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>>>>
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