Re: batteries

["D. Buchner" <Buchner@mega-com.com>]

>> I guess it depends on how gung-ho you're getting about speed/range, but....
>> lead-acid (old car batteries, new car batteries, marine "deep-cycle"
>> batteries, industrial/golf cart batteries like the ones I'm using in my
>> solar powered house?)? More exotic and expensive NiCd's or ??? ...

>The LAST thing you want in a closed, life support, pressure vessel is
>H2SO4
>and hydrogen gas!!!  One spark and BOOM!!! STAY AWAY FROM CAR BATTERIES!!!
>(Not to mention what happens when they come in contact with sea water!)
>The so-called maintenance free batteries are not truly sealed either.

Right, but -

These batteries gas during *charging*. To me, this means when surfaced and
ventilated.

I never come into contact with sea water, due to my land-locked midwestern
type situation. (But I'm curious, what does happen when they come into
contact with seawater?)


>such as the Exide Nautilus Mega-Cycle gell battery.  These are available
>special order from K-mart for about $100 in a type 27 format.  These are
>designed to operate even if totally submerged in water.  This is the style
>I plan on using in my sub (4 total).

Cool. What is "type 27"? Any idea the capacity (amp-hrs) of these? Operate
totally submerged? How do they design for *that*? Sealed battery
connections? Oh so many questions...

>> A bit more complexity would get you diesel-electric (or gas) and would
>
>Please, no gas in a submersible. The worlds navies dropped gas engines
>because of explosive fumes. Bad enough in a boat. In a Sub its deadly.

I have a silly question. Are there outboards which can start after being
submerged?


 - David
<Buchner@mega-com.com>