Measuring Gearbox Efficiency Using Powered Up

[TechnicBrickPower]

Hi Everyone,

Here I describe a method for measuring the efficiency of a gearbox using the Lego Technic Powered Up hub (Control+) and a motor to lift a weight. Gearbox efficiency is defined as the ratio of the output power to the input power and here I show how to measure each of these values to allow you to calculate the overall efficiency. Gearbox losses are due to friction within gears and axles rubbing on the liftarms. By measuring these losses gearbox designs can be tested and improved. Efficiency values are calculated and shown for several gearing combinations and for an automatic gearbox design.