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Re: Batteries AGM
Hi Ken,
>How far are you on your Sub?
I have finished the design. The hull(s) will start to be purchased in the next few months. I am very financially limited unlike the rest of you (made of money :) )
>For what it's worth, I am currently installing 1250 Techspheres one at a time
>in my Sub. I have installed 443 and it has taken about 2 weeks. I am using
>epoxy with a microballon filler (West Microlight 410) which requires laborious
>mixing. The epoxy cost $89 and it looks like I will need more.
What are techspheres? With this kind of peice by peice labour, how can you be sure of proper balance in your sub?
>I got a response from Concorde on their Lifeline AGM group 27 batteries and
>got told that the valve installed as part of their battery will not withstand
>much more than 4 atmospheres of external pressure. The valve is supposed to
>open and allow ambient pressure into the battery. I had planned to use these
>batteries in a pressure compensated dry housing but may have to seal the
>battery compartment at 1 atmosphere, and I don't want to do this.
After the discussion, I had resolved to use 1 ATM for the sub and also to put the batteries in that 1 ATM. If you are forced to, I would imagine that a 1/2" thick steel tube attached to the bottom of your sub would give you the 1 ATM you need. An inside sliding track for the batteries would allow you to remove the batteries out of an end that would possibly screw on? Just a thought but I think it would work... This type of steel structure would be the most affordable as well I believe. :)
>Does anyone out there know any more on the capabilities of sealed AGM
>batteries?? Either Concorde or another vendor? Concorde is not very responsive
>to my E-mail requests.
I've found that most of the companies respond in the above fashion. :)
>Ken Martindale
I wonder if any of the group is near Colarado? Reynolds Polymer in Colarado is the most common supplier of acylic to those great looking subs! I haven't found them on the Internet yet but many sub builders have pointed me in this direction.
ttfn
Sean