[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 118, Issue 9

Mon Jun 19 17:11:45 EDT 2023

Ocean Gate Monday update?Sent from my Galaxy
-------- Original message --------From: via Personal_Submersibles <personal_submersibles at psubs.org> Date: 6/19/23  3:03 PM  (GMT-05:00) To: personal_submersibles at psubs.org Subject: Personal_Submersibles Digest, Vol 118, Issue 9 Send Personal_Submersibles mailing list submissions to	personal_submersibles at psubs.orgTo subscribe or unsubscribe via the World Wide Web, visit	http://www.whoweb.com/mailman/listinfo.cgi/personal_submersiblesor, via email, send a message with subject or body 'help' to	personal_submersibles-request at psubs.orgYou can reach the person managing the list at	personal_submersibles-owner at psubs.orgWhen replying, please edit your Subject line so it is more specificthan "Re: Contents of Personal_Submersibles digest..."Today's Topics:   1. Re: Power sources (Rick Patton via Personal_Submersibles)   2. Re: Power sources (Alan James via Personal_Submersibles)   3. Re: Power sources (Jon Wallace via Personal_Submersibles)----------------------------------------------------------------------Message: 1Date: Sun, 18 Jun 2023 11:05:47 -1000From: Rick Patton via Personal_Submersibles	<personal_submersibles at psubs.org>To: Personal Submersibles General Discussion	<personal_submersibles at psubs.org>Subject: Re: [PSUBS-MAILIST] Power sourcesMessage-ID:	<CAODkcU9oew=Faj15SR=_RS7nSBgAUauDZmBDbUB0-XWqreovoQ at mail.gmail.com>Content-Type: text/plain; charset="utf-8"Thanks Alan, that is what I would do if I went that route, any idea whatthe lifepro batteries cost? I just shelled out $1,400 for my 8 led acidbatteries that I finally got to fit into the pods which was quite a job. Asyou probably know, when you are building a sub, everyone that knows aboutit asks "so when will it be done?" and I stopped trying to give them ananswer because some jobs like the batteries that you think will go fast,ending up taking way longer than expected.RickOn Sun, Jun 18, 2023 at 9:32?AM Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:> Hi Rick, this is part 2, hit send by mistake. Small phone big fingers. The> weight of lead on its own under the batteries could quite possibly> compensate for the difference in weight between the life po4 batteries &> the lead acid batteries, and make your centre of gravity lower.> Cheers Alan>> Sent from Yahoo Mail on Android> <https://mail.onelink.me/107872968?pid=nativeplacement&c=Global_Acquisition_YMktg_315_Internal_EmailSignature&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000604&af_sub5=EmailSignature__Static_>>> On Mon, 19 Jun 2023 at 5:49 am, Rick Patton via Personal_Submersibles> <personal_submersibles at psubs.org> wrote:> _______________________________________________> Personal_Submersibles mailing list> Personal_Submersibles at psubs.org> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles>> _______________________________________________> Personal_Submersibles mailing list> Personal_Submersibles at psubs.org> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles>-------------- next part --------------An HTML attachment was scrubbed...URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20230618/baed1d12/attachment-0001.html>------------------------------Message: 2Date: Mon, 19 Jun 2023 07:30:40 +0000 (UTC)From: Alan James via Personal_Submersibles	<personal_submersibles at psubs.org>To: Personal Submersibles General Discussion	<personal_submersibles at psubs.org>Subject: Re: [PSUBS-MAILIST] Power sourcesMessage-ID: <402607032.1768896.1687159840679 at mail.yahoo.com>Content-Type: text/plain; charset="utf-8"Rick,?I am the last person you should talk to about projects being over time. Some things that you think will take days take months.I am not sure of the cost of lifepo4 batteries. I have looked at comparisons regarding depth of discharge & cycle times & seen that they are a comparative price when all things are considered.?However I am waiting for the next generation of batteries to come on the market. And the rate I am going they will be on the market by the time I am ready for them.AlanSent from Yahoo Mail on Android    On Mon, 19 Jun 2023 at 9:07 am, Rick Patton via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   _______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles  -------------- next part --------------An HTML attachment was scrubbed...URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20230619/704af333/attachment-0001.html>------------------------------Message: 3Date: Mon, 19 Jun 2023 19:02:16 +0000 (UTC)From: Jon Wallace via Personal_Submersibles	<personal_submersibles at psubs.org>To: Rick Patton via Personal_Submersibles	<personal_submersibles at psubs.org>Subject: Re: [PSUBS-MAILIST] Power sourcesMessage-ID: <841683016.2040915.1687201336070 at mail.yahoo.com>Content-Type: text/plain; charset="utf-8" Roughly speaking lifepo is about half the weight of lead-acid. ?I?m going to compensate that difference with lead. However, the physical size advantage will only come into play if you build from individual cells since most 12volt lifepo batteries on the market mimic traditional sized lead-acid batteries and therefore there would be no physical size advantage. ?So you need to purchase individual cells, group them together into a battery, and then match a BMS to it for discharge and charging.?An alternative would be to purchase a ready made battery (group 24 for example) and then strip the cells and BMS out of it to reduce the physical size. ?Jon    On Sunday, June 18, 2023 at 01:49:40 PM EDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:    Thanks JonHow do I pay for the stickers??What are the dimensions?and weight of the Lifepro batteries and are you still using 4 per pod? Sounds like they are lighter? if so, how did you compensate for the weight difference?? What were the costs of each??RickOn Sun, Jun 18, 2023 at 4:04?AM Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote: Rick, this is the primary reason I am switching to DIY lifepo batteries.? The K-boat battery pods make dealing with standard batteries difficult especially given their weight.? When I was with Dan Lance earlier this year he had a battery that did fit but only without the removable tray in the plans. ?I can send you stickers.? I?m out of town until mid week so will contact you then.?Jon    On Friday, June 16, 2023 at 02:29:59 PM EDT, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:    I had some difficulty?in inserting?my batteries the other day into the pods because of how close the battery lugs were to the wall of the pod. I had built an aluminum?tray for the batteries to make it easy to install and remove them for maintenance?and used 1/4" aluminum flat bar to fabricate them but I had to do away with the trays?because?of clearance issues and so even though that only bought me a 1/4" of an inch, I needed all the help I could get. It also helped in having the battery cables slide over the tops of the fill caps more easily when attached to the all thread that passes the power into the sub as they flex and bend when pushing it in after attaching.?Anyone else that is building a K-350 have that same problem? I welded two pieces of SS angle in the pods for the trays to slide on and can't remove them and lower them as they were put in before I welded the ends on. As they go down, they come together being pipe so I couldn't of gone much lower with them and still have the horizontal room to fit the batteries.?I also wanted to buy a couple of Psubs stickers that I have seen on other peoples boats and tried to do that on our web site?but I didn't have any luck finding the store that would have them for sale. Any ideas?RickOn Fri, Jun 16, 2023 at 7:20?AM John Bussard via Personal_Submersibles <personal_submersibles at psubs.org> wrote:Grateful for all the info here.? While I was vague and only stated ?Li ion? I definitely have no fixed start point, so this is all good to learn about.? And certainly echo Busby that one needs to consider weight for ballast purposes as well.? I?ve spent most of my life around airplanes, so a slightly different approach to weight reveals itself, though CG management is a common theme here.Thanks to all for the info and discussion.On Jun 3, 2023, at 7:51 PM, Michael Holt via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  I was sent some Waterways World magazines from 2020, a couple of years ago.? There are advertisements for electric power systems for canal boats.? They start with diesels tied to generators tied to batteries that drive 48VDC motors.? There appear to be versions that have no diesels involved, and the batteries are recharged from shore power.? In the UK, that's 230VAC.  If anyone's interested, I'll dig out the magazines and make a list of the websites.   Mike   _______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles  _______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles  -------------- next part --------------An HTML attachment was scrubbed...URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20230619/0f0758bb/attachment.html>------------------------------Subject: Digest Footer_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles------------------------------End of Personal_Submersibles Digest, Vol 118, Issue 9*****************************************************
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