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jumpjack
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Join Date: Jan 2013
Location: italy
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Quote:
 Originally Posted by mort Hi jumpjack, So its in mostly conventional units but look: The ecomodder calculator. Your chart doesn't seem to have any weight of vehicle. If I run with your Cd and area, I see this. 550 KG (1200 lb) is a very light car. -mort
I updated the tables adding Wh/mi.
The weight of the vehicle is included by means of rolling friction (--> rolling power), but it slightly affects result, as it depends on "v", while air friction depends on "v^3".

This table shows how much rolling friction affects total power:
Code:
``` Pair+Proll 	 Proll 	Proll/Ptot
228 	 221 	97%
492 	 443 	90%
830 	 664 	80%
1083 	 797 	74%
1278 	 886 	69%
1873 	 1107 	59%
2161 	 1196 	55%
2652 	 1328 	50%
3652 	 1550 	42%
4909 	 1771 	36%
6460 	 1993 	31%
8342 	 2214 	27%
10111 	 2391 	24%
10592 	 2435 	23%
13246 	 2657 	20%
16342 	 2878 	18%
19915 	 3100 	16%
24004 	 3321 	14%```
Rolling friction force:
Froll = mu * m * 9,81
mu = 0,015 (rolling friction coefficient)
m = vehicle weight in kg

Simplified formula:
Froll = 0,15 * m