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Level ground and steady speed calculations
Weight is 3000 lbs. and rolling coefficent is .01
front area is 20 ft^2 and coefficent of drag is .459
electric rate is $.20 per kw-hr elec eff = .6071429
speed tire air total horse equiv. cents
mph lb lb force power kW /mile
0.00 30.00 0.00 30.00 0.00 0.00 ----
5.00 30.02 0.75 30.77 0.41 0.31 2.02
10.00 30.04 3.00 33.04 0.88 0.66 2.17
15.00 30.06 6.75 36.82 1.47 1.10 2.41
20.00 30.08 12.01 42.09 2.24 1.67 2.76
25.00 30.10 18.76 48.87 3.26 2.43 3.20
30.00 30.13 27.02 57.14 4.57 3.41 3.74
35.00 30.15 36.77 66.92 6.25 4.66 4.39
40.00 30.17 48.03 78.20 8.34 6.22 5.12
45.00 30.19 60.79 90.98 10.92 8.14 5.96
50.00 30.21 75.05 105.25 14.03 10.47 6.90
55.00 30.23 90.81 121.04 17.75 13.24 7.93
60.00 30.25 108.07 138.32 22.13 16.51 9.06
65.00 30.27 126.83 157.10 27.23 20.31 10.29
70.00 30.29 147.09 177.38 33.11 24.70 11.62
75.00 30.31 168.85 199.17 39.83 29.72 13.05
80.00 30.33 192.12 222.45 47.46 35.40 14.58
Basic Program to calculate above table
10 OPEN "CARCOST.TXT" FOR OUTPUT AS #1
20 weight = 3000
30 tirecoef = .01
40 tireviscoef = .005 / (60 * 60)
50 carea = 20!
55 elecrate = .2
57 eleceff = .85 * 10 / 14
60 aircoef = .459
70 PRINT #1, "weight is "; weight; " lbs. and rolling coefficent is "; tirecoef
80 PRINT #1, "front area is "; carea; " ft^2 and coefficent of drag is "; aircoef
85 PRINT #1, "electric rate is "; elecrate; "$ per kw-hr"; " elec eff = "; eleceff
90 PRINT #1, ""
100 roll = weight * tirecoef
110 air = carea * aircoef * .00327
120 PRINT #1, " speed tire air total horse cents "
121 PRINT #1, " mph lb lb force power kW /mile "
200 FOR speed = 0 TO 80 STEP 5
210 rollvis = tireviscoef * weight * speed
220 drag = air * speed * speed
240 force = roll + rollvis + drag
280 hp = force * speed / 375
290 kw = hp * .746
292 cost = 0
293 IF speed = 0 GOTO 300
295 cost = elecrate * 100 * kw / (speed * eleceff)
300 PRINT #1, USING "####.## "; speed; roll + rollvis; drag; force; hp; kw; cost
320 NEXT speed
400 CLOSE
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