Speed Calculator

[jhautz]

Are you trying to justify the 0.9mph inaccuracy. :005: This was a compliment.. Not a criticism. Man you are a perfectioninst. :rolleyes:


My setup. Emaxx w/ stock diffs and 2nd gear tranny, 5.8" Zombie-maxx tires (duct taped to reduce balooning), Lehner 1940/7 motor, BK12020 ESC, 5s TrueRC lipo (I assumed 3.5V/cell under load). 51T/16T gearing.

Heres the data output from you calculator:

Differential Ratio:	2.8461538461538462
Transmission Ratio:	1.7222222222222223
Other Ratio:	1
Spur Tooth Count:	51
Pinion Tooth Count:	16
Total Voltage:	17.5
Motor KV:	2239
Tire Diameter (inches):	5.8
Tire Ballooning (inches):	0.25
Motor Current Draw:	0
Motor coil Ω:	0
Spur/Pinion Ratio:	3.19 : 1
Total Ratio:	15.6242 : 1
Tire Circumference (inches):	19.79 inches (502.72mm)
Total Motor Speed:	39182.5 RPM
Vehicle Speed:	47 MPH (75.5km/h)
Effective Speed Rate:	2.69mph/V (4.31kmh/V)