RE: [PSUBS-MAILIST] Alec - Battery question

["Alec Smyth" <Asmyth@changepoint.com>]

Hi Brent,

I'm going to have 3 batteries, all of them AGMs. Two are big "4D" batteries, in series for 24 volts, and the third a much smaller 12V for house loads. Runtime of course varies drastically depending on how I use the throttle.  At full power, this arrangement should supposedly give me a runtime of 1.6 hrs. But then again, I would certainly not expect to hold full throttle for extended periods, and as you reduce power the runtime goes way up.

rgds,

Alec

-----Original Message-----
From:	Brent Shaw [mailto:drydivenz@yahoo.com]
Sent:	Tue 1/28/2003 10:15 PM
To:	personal_submersibles@psubs.org
Cc:	
Subject:	RE: [PSUBS-MAILIST] Alec - Battery question

Alec

How many batteries are you planning on having in your
sub and what is going to be your run time?

Brent



--- Alec Smyth <Asmyth@changepoint.com> wrote:
> Solo has AGMs inside the pressure hull. One of the
> more bizarre design details is they're mounted on
> the "ceiling" instead of the floor. This is to raise
> the center of gravity, since its a flyer and I'm
> trying to reduce the self-righting moment. And if
> that wasn't weird enough, they're upside down so I
> can get at the lugs.
>  
> My main recommendation for battery safety using AGMs
> is to invest in a really good charger to prevent H2
> gassing. I got a "Truecharge 40", which was about
> 400 odd bucks. Its microprocessor controlled and
> designed specifically for AGMs, which have a
> different charging voltage than other technologies.
>  
> We'll see if it all blows up once completed.
>  
>Alec
> 
> 	

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