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