It sounds very similar to the battery we have sold to around 20 Europa
builders. Ours is a 13 amphr version and weighs under 5 kg. Starting
capacity is excellant. However don't leave them flat it kills them very
quickly! early versions of the battery we sell could be damaged by
overtightening the terminals. This seems to have been overcome by new more
tolerant terminal design.
Jerry
Flying Hi - Wish I was
----------
> From: Robert L. Nuckolls, III <nuckolls@aeroelectric.com>
> Subject: Re: Battery
> Date: 07 July 1998 23:53
>
> >>Just stumbled over an announcement of a swedish firm for their
"Long-life
> >>Battery" called "OrangeTop":
> >>
> >>- closed lead battery type with spiral wound cells instead of
traditional
> >>flat ones
> >>- no checking / topping up required as it does'nt leak or gas
> >>- delivers same level of current as conventional units two or three
times
> >>its size
> >>- life cycle between 9000 to 12000 cycles (compared to around 4000 for
> >>conventional units)
> >>- long shell life
> >>- two year warranty
> >>
> >>Contact:
> >>Gylling Optima Batteries AB
> >>PO Box 742
> >>18217 Danderyd, Sweden
> >>Tel: +46-8-6223237
> >>Fax: +46-8-6223290
> >>refer to Electronic Product News 6/98, Info No. EPN 4056
> >>
> >> sorry, no e-mail or web access given
> >>
> >>HAND
> >>Karl
> >
> >I hope this may be of interest - I don't know if the batteries quoted
are
> >at all suitable for aviation use, maybe someone else here has that
answer.
> >
> >Also if there is anyone else here afflicted with "Ozwin" who knows how
to
> >make it reply to all, perhaps they could contact Karl
> ><100725.3150@compuserve.com> direct with advice. (If all else fails,
Karl,
> >try sending a _new_ message to the list address <europa@avnet.co.uk>
rather
> >than trying to reply to an existing message. I know this may foul up the
> >threading for some types of readers, but at least it will save me or the
> >Europa Club internet rep some time.)
>
> Nothing really "new" here. The "jelly-roll" battery was patented
> by Gates Energy Products in Colorado over 20 years ago . . . the
> patents have died. For years, Gates produced the Cyclon series
> cells in sizes up through 25 a.h.
>
> About 10 years ago, Gates sold the tooling and process for the
> larger spiral wrapped batteries to Optima Battery in Denver,
> Colorado. Saw one of their batteries in my favorite autoparts
> store last week.
>
> Everything they claim about the battery is true (generally).
> I'd be a tad suspicious of the "cycle" rating. The way
> these numbers are gathered may have nothing to do with the
> way the battery will be used in your airplane. Suffice it
> to say, this is a re-encarnation of a proven technology
> in a gas recombinant battery. They DO have phenominally
> low internal resistance and are good crankers . . . but then
> ALL gas recombinant batteries are good crankers.
>
> If the dimensions and weights for the battery are attractive
> to you in your application, there's probably nothing wrong
> with the. The only battery I've seen by Optima here in the US
> is about 35 a.h. and weighs in at about 40 pounds.
>
> Given the size of engines going into most Europas, I wouldn't
> loose much sleep over battery selection. A 10 a.h. battery
> will crank fine . . you need to chose capacity so that your
> alternator-out endurance with minimal equipment exceeds
> fuel endurance when the battery is down to 1/2 new capacity.
> Then it's time to replace it . . . no matter how well it
> still cranks the engine.
>
>
> Bob . . .
> ////
> (o o)
> < If you continue to do >
> < What you've always done >
> < You will continue to be >
> < What you've always been. >
> <http://www.aeroelectric.com>
>
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