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At the moment, about the best that commercial Li-Ion rechargeable cells can do is about 200+ W-hr/kg.
In more familiar units, this translates to about 1/2 HP for an hour for each pound of batteries carried. Basically, the weight in pounds will be twice the HP times the number of hours that you want.
Good for a motor-glider, but that is about it.
Bill Dube'
At 07:45 PM 7/5/2006, you wrote:
Really was something to see that Bike burn out...
Or may even to skew Bob's comment some, How about 175hp for 20 minutes, then
125hp for 4 hours, with a 30 minute 175hp reserve.
Tony Snow (Bearhawk #753)
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Bob White
Sent: Wednesday, July 05, 2006 9:01 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Nothing to do with Rotary Engines, but....
Very impressive indeed. Another one or two orders of magnitude
improvement and we can forget the rotary and just put an electric motor
up front (or out back if you're so inclined). Now that would be
simple, reliable, and quiet too boot. How about it Bill? Can you give
me 175 HP for 4-5 hours in 200 lbs or so? (Damn the cost, that would
be worth taking out a new mortgage on the house.) ;)
Bob W.
On Wed, 5 Jul 2006 20:36:29 -0400
"Ed Anderson" <eanderson@carolina.rr.com> wrote:
<snip>
>
> Very impressed with your electric drag bike endeavors - got to be almost
as
> good as flying a rotary {:>)
>
> Ed
>
> Ed Anderson
> Rv-6A N494BW Rotary Powered
> Matthews, NC
> eanderson@carolina.rr.com
> http://members.cox.net/rogersda/rotary/configs.htm#N494BW
> ----- Original Message -----
> From: "Bill Dube" <William.P.Dube@noaa.gov>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Wednesday, July 05, 2006 7:50 PM
> Subject: [FlyRotary] Nothing to do with Rotary Engines, but....
>
>
> > This has absolutely nothing to do with rotary engines, but I thought I'd
> > show you what has been distracting me from my airplane construction as
of
> > late.
> >
> > For those of you that don't already know, my other hobby is drag racing
an
> > electric motorcycle. (It takes a team of people to do this, not just
me.)
> > We recently managed to get sponsorship from A123 Systems. These
batteries
> > are like "Mr. Fusion" in the movie "Back to the Future." Enormous power
> > and a bottomless pit of energy. The more I work with these batteries,
the
> > more impressed I become.
> >
> > Here is a clip of the bike doing a burn-out:
> >
> > http://www.killacycle.com/Burnout.wmv
> >
> > Here is a clip of the bike turning parts of the rear motor into
molten
> > copper as it goes down the strip:
> >
> > http://www.killacycle.com/Second%20Run.wmv
> >
> > We can do six burn-outs and six runs without recharging if we cared
> > to. Maybe seven.
> >
> > The 170 battery pack puts out over 350 HP. The battery pack is 376
> > volts, 1350 amps, and has 18.4 A-hrs. We charge up in about 15 minutes
> > after every run.
> >
> > I plan to start building airplane batteries with them soon, by the
way.
> > It will be late Winter, probably. A123 Systems batteries are ideal for
> > aircraft. They are lightweight, powerful, robust, long cycle life, and
> > very, very safe. I'm pretty sure I can build a battery that will crank
500
> > amps, but will weigh less than 3 lbs.
> >
> > I guess it had something to do with airplanes.... :-)
> >
> > Bill Dube'
> >
> > --
> > Homepage: http://www.flyrotary.com/
> > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
> >
>
>
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
--
http://www.bob-white.com
N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
Custom Cables for your rotary installation -
http://www.roblinphoto.com/shop/
--
Homepage: http://www.flyrotary.com/
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