[PSUBS-MAILIST] Build Updates

Mon Jan 4 18:17:08 EST 2021

Hi Rick,

I wasn't following the blueprints, I was the one drawing them. Hopefully
they will be easy to follow! As for effort, I really don't know. Hank is a
fast builder and makes something like this in a few days, but for me it's
more like a couple of months and making the drawings was as much work as
making the parts themselves. The files include a bill of materials so you
can see the cost of everything. The big variable is how much you pay for
the actuators, as there is a vast difference between what they cost new and
what you can sometimes pick them up for on eBay or on Amazon open box
specials. I'm guessing I must have spent about a grand total.

Best,
Alec

On Mon, Jan 4, 2021 at 5:19 PM Rick Patton via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I guess I missed the link, thanks for sending it.
> Was it easy to follow and put together? What was your total out of pocket
> on it and how long did it take you?
>
> Rick
>
> On Mon, Jan 4, 2021 at 11:14 AM Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi Rick,
>>
>> Shackleton's arm is basically Hank's design with a few small changes. You
>> must have missed the announcement, we uploaded the blueprints to PSUBS so
>> anyone can build it.
>>
>> http://www.psubs.org/community/projects/
>>
>> Best,
>> Alec
>>
>> On Mon, Jan 4, 2021 at 2:09 PM Rick Patton via Personal_Submersibles <
>> personal_submersibles at psubs.org> wrote:
>>
>>> Alec
>>>
>>> Which arm are you using? is it the one Hank designed and built or a
>>> different one?
>>>
>>> Rick
>>>
>>> On Mon, Jan 4, 2021 at 8:42 AM Alec Smyth via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> What a good idea Cliff!
>>>>
>>>> My update is relatively simple. Shackleton has the arm and also I put
>>>> in a "diver recall system" from OTS. It's a hydrophone that allows you to
>>>> listen to ambient sounds, as well as functioning as a speaker to
>>>> communicate with nearby divers or subs that have no comms gear. Basically
>>>> it's a 120 watt speaker in the water, and is supposedly audible for 100m
>>>> with voice and 300m using a tone. We shall see, however, how well it works.
>>>> The challenge is that, in listening mode, it hears its own speaker in the
>>>> sub and if the volume is turned up too much you get a feedback loop (a very
>>>> loud screech.) I could solve the issue by wearing headphones in the sub,
>>>> but prefer not to do that. After lots of experimentation, I've got to where
>>>> I can run the volume at 75% without triggering feedback, but that is while
>>>> sitting on the driveway. As water conducts sound much better than air, I
>>>> expect ihe feedback to happen earlier in the water.
>>>>
>>>> I'm now building a slurp gun (suction sampler.) We have an Innerspace
>>>> Science expedition planned to Sebago Lake in Maine, together with Brian
>>>> Hughes and his sub Harold, in collaboration with St Joseph's University of
>>>> Maine. It's just a matter of when Covid will allow us to go, with the
>>>> expected date being in the late summer or early fall. Before that, I will
>>>> need to do a depth test, most likely in Seneca Lake.
>>>>
>>>> Best,
>>>> Alec
>>>>
>>>> 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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