[ausev] EV Calculator Script

Nick Viera eaalists at driveev.com
Thu Jan 4 05:26:50 GMT 2007


Hi Lisa and all,

Lisa Korf wrote:
> This looks great, but where can I read up on some of
> these variables so that I know what to enter?

Good question... I've got some links at the bottom of the EV-RATS page 
(in the notes section) to sites that list some Coefficient of drag (Cd) 
and frontal area numbers... I'll have to add some other sites down there 
as well.

For Cd and frontal area numbers:
http://www.mayfco.com/tbls.htm
http://en.wikipedia.org/wiki/Coefficient_of_drag

For rolling resistance numbers:
http://en.wikipedia.org/wiki/Rolling_resistance
http://auto.howstuffworks.com/tire4.htm

For battery information check your battery manufacturer's website.
Peukert's exponents will probably have to be calculated for your battery 
type, if the info is not provided. I should probably look into adding 
that functionality to the script. I do know that the Peukert's exp. for 
Trojan 8-volt batteries is 1.30 and 1.24 for Trojan 6-volt batteries. 
12-volt sealed AGMs will be much lower, like 1.10 or thereabouts.

Hope that helps,

-- 
-Nick
1988 Jeep Cherokee 4x4 EV
http://Go.DriveEV.com/
http://www.ACEAA.org/
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