[PSUBS-MAILIST] Build Updates

Mon Jan 4 18:27:32 EST 2021

Alec
Sorry for the misstep. Yes I can imagine that it took a while to draw
everything out. I'll check it out. A grand sounds real reasonable for what
it is.
Rick

On Mon, Jan 4, 2021 at 1:18 PM Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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
>>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>>>
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>>>>>>
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