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#1
05-16-2012, 10:55 PM
 EVDL List EVDL List Bot Join Date: Jul 2007 Posts: 70
[EVDL] 20 kW/kg! was: Ran a 7.621 today on just 274 volts (was: Lift EV racing ban)

Holy bleep Bill, was that really 20 kW/kg? No slipping a decimal place or s=
omething? If it is really 20 kW/kg, wow... Let's put that into some perspec=
tive:

My stock V8 ice motor only is about 1 kW/kg

My buddy's racing V8 motor only is about 2 kW/kg

A top fuel dragster (the whole vehicle, around 7000 hp and 2500 lbs) is aro=
und 5 kW/kg

Let's see, suppose you did a top fuel dragster that was 1/2 of the weight i=
n these batteries... 1250 lbs would be 11 MEGAWatts of power! That's around=
15,000 hp!

Holy moly again! Bill watts the highest power you've tested out of these?

Holy guacamole, the motors in the motorcycle outweigh the battery pack!

________________________________
From: Bill Dube <xxx@xxx.xxx>
To: Electric Vehicle Discussion List <xxx@xxx.xxx.edu> =

Sent: Wednesday, May 16, 2012 7:04 PM
Subject: [EVDL] Ran a 7.621 today on just 274 volts (was: Lift EV racing ba=
n)

# [top] Let's see if this post is OK. We ran the KillaCycle today on our new 68 lb pack of A123Systems "F1" ce

lls. These deliver 20,000 W/kg.

We are in the testing mode still, and we have not yet completed the full bu=
ild on the battery pack, so it is just 274 volts. (We will complete the bui=
ld in the next few weeks and build up to 375 volts.)

We are "dialing in" the bike still. Today, Tracy Helmhold made a very clean=
pass (before the rain and wind arrived) and the bike ran the 1/4 mile in 7=
.621 at 170 mph. Tracy did such a smooth job that it looked easy.

Here is a video link to the run:
http://youtu.be/BZlghp5b8iE
I especially liked how Tracy did the burn -out. Not more than I liked the l=
ow ET, of course. ;-)

We captured data from the Zilla for this run with Steve Ciciora's nifty "Zi=
llaSucker" data logger box.
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