of course they teach you motors in ME. you just need a few hints.

you know how fast you want it. look at kv ratings to determine motor speed. 1 volt = how many rpm. you know gearing and how to calculate the circumference of a wheel to determine velocity. there will be a ratio on the pinion to spur, a built in ratio to the chassis (found in a manual).

or you can find a dyno curve on here for a motor and calculate the torque you need in order to move the mass.

or you can calculate the power you need to achieve the speed and torque to do the work and as long as the math is right. take the calculate torque and rpm and put a single dot in the middle of the dyno curve and select a chassis based on that. you will lose 25-50% torque and rpm if the dyno curve is motor only and not a log from a chassis dyno.

the tough calculation is acceleration torque but if you can ballpark 2-3 times continuous torque as a limit to peak torque. or run for short bursts. or get a motor for a rc boat that can be liquid cooled and get 4-10 times continuous torque as you peak torque limit.

if you minimize rolling friction the work the motor has to do will be minimal. the acceleration will make or break the project in that case.

matching the load and power train inertia to the rotor inertia at something less than 30:1 will probably be a good starting point. just select a ratio that allows you to move up or down a little when you go to run your tests so you can tune the heat out.

most calculations are mech not electric.



this is a trinity factor 17.5 with a final ratio of about 3.7:1 and wheel diameter of 63mm.