Quote:
|
Originally Posted by Joe P
STU,
We just got a prototype chassis running with the CIM Dewalts. We haven't had time to think about this yet. Maybe someone on Team 47 has done some work on this, I don't know?
|
This is a thing easily done. The planetary gearboxes should be pretty close to the "published" efficiencies of 85-90% for each planetary stage (with these low ratios per stage -- higher ratios like 10:1 in one stage can be VERY inefficient).
This would mean that in 2nd & 3rd, the gearbox should be 70-80% effecient and in 1st, the gearbox should be 60-70% efficient.
Note well that effeciencies apply to TORQUE not speed. The speeds are simply divided by the ratio while the torques are multiplied by the (ratio X eff).
Given this data, it is a simple matter to go into DrJoesMotorCalc spreadsheet and get any speed-torque curve your heart desires.
Joe J.