Yep, hard to beat old dinosaur juice for energy density. But = put me=20 down for a "Yes" on wanting one of those A/C batteries. The = starting=20 current is fine but I'd like to keep about 20 amp-hours on board for = alternator=20 failure situations. What is the AH range you anticipate = doing?

Tracy

----- Original Message -----

From: BillDube@killacycle.com =

To: Rotary motors in = aircraft

Sent: Thursday, July 06, 2006 = 1:23=20 AM

Subject: [FlyRotary] Re: = Nothing to do=20 with Rotary Engines, but....

At the moment, about the best that commercial Li-Ion=20 rechargeable
cells can do is about 200+ W-hr/kg.

In more = familiar=20 units, this translates to about 1/2 HP for an hour
for each pound = of=20 batteries carried. Basically, the weight in pounds
will be twice = the HP=20 times the number of hours that you want.

Good for a = motor-glider, but=20 that is about it.

Bill Dube'

At 07:45 PM = 7/5/2006, you=20 wrote:

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