I have been trying to design a drive train using the 12:1 plantery gearbox for the small CIMs, that way I can just adjust the speed a bit more with only one stage of chain/gear, which makes things really simple. I have a few concerns regarding the plantery gearbox, however.
1. What is the efficiency of the gearbox?
2. If efficiency is a problem, does lost efficiency come in the form of lost speed or torque?
3. And lastly, if it is lost torque, will I lose a pushing match against a robot geared to similar ratios, using same motors and wheels. Or, will I tie that pushing match (since my motor is at stall, no part of the transmission is moving, and it's just solid contacts everywhere

)
Help please, and thanks in advance.