Originally Posted by
zipp
M7H, not sure if your calculations are correct.
Roll out is the distance moved with 1 revolution of the motor
roll out = wheel circumference / fdr
Assuming you're using standard rubber tires with diameter of 59mm, circumference would be 59 x pi = 185mm
With a roll out of 57mm you would be running a fdr of 3.25
12th scale
Tire diameter is 43mm....
spur 80, pinion 34.
foam.