Fenix Reference G12
19
Rev. 0.2.1
Millimetre per revolution aka Rollout
Pancar (1/10 – 1/12) are using foam tires, where ratio need to be adjusted after each run, the system is MM
(millimeter) Per Revolution aka Rollout.
It means you want to check how many mm the motor move each revolution.
You need to know:
Diameter of tire (easy take your Vernier and check it…) :
Spur size and Pinion size
Diameter x 3.14 = perimeter
Tire diameter 41 x 3.14 = 128,74mm ok… keep it..
Spur / pinion 81 /26 = 3.11 (gear ratio)
128,74/3.11 = 41.39mm
This means that every time your motor spins, the rear wheel makes 41.39mm.
To keep constant the performance, you’ve to adjust the gear ratio according the wheel diameter.
