ElectricMotorcycleForum.com
Makes And Models => Zero Motorcycles Forum | 2012 and older => Topic started by: RickSteeb on August 17, 2012, 02:27:40 AM
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6.9 seconds, 201.37MPH... 800HP... 14.2kW-hr, 355Volts ...
http://machinedesign.com/article/electric-motorcycle-tops-200-mph-0809 (http://machinedesign.com/article/electric-motorcycle-tops-200-mph-0809)
:o
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Record was set on May 4th. Truly insane bike. Some reports claim up to 1300 hp, not "just" 800.
4000A @ 400V. Poop.
Zero S is 420A @ 65V. How'd you like to have, say, 80x the power in a bike. Insane.
250 lb battery, rest of the bike is 830 lbs? Pretty crazy.. obviously it's doing the trick.
1300 hp = 1000 kW, 1000 kW * 7 seconds / 75% efficiency (say) = 2.6 kWh. Let's say the battery sags down to 250V when he hits it that hard.. that's 10.4 Ah lost from the 40 Ah pack. I don't buy the "enough charge for 1 run" thing, but probably the first run is the fastest. And I guess if you build the fastest drag bike, you only want to ride it at that pace.
Larry McBride also held the 2009 record for world's fastest dragbike.
http://www.knfilters.com/news/news.aspx?ID=2461 (http://www.knfilters.com/news/news.aspx?ID=2461)
His reported fuel consumption was 4 gallons, 5.793s @ 245.36 mph.
Now.. 4 gallons will take a regular 50 mpg bike around 200 miles, so energy consumption/mile is about 800x.
10.4 Ah @ 350V = 3.5 kWh, or 14000 Wh/mile. I get around 110 Wh/mile, so energy consumption/mile is about 130x.
Not a fair comparison as McBride's 2009 gas bike is more than a second lower ET.. but still.
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When the Killacycle bult by Bill Dube had the first place back to 2 years ago with 177mph at 7.8s, i have read that they was heating their A123 battery pack to 70 celsius to lower the internal resistance and have less voltage sag!.. They also needed to replace one set of brush nearly every race and rebuild their motor every 3 races.
For or overvolted electric bicycle hub motor, we are able tooverpower them to 10kW before the saturation occur in the stator but they are made for 500W !!.. so i guess that once people will begin to use brushless motor, they will be able to send ton of power in them and probably go over the megawatt easyer.
With a 500W brushed hub motor we wold burn the brush at 1000W only... so the brushless that have the commutation of the stator phase seem more interesting for overpower.. I bet that over the next years they will dominate the market ... also for the diy man!
Doc