This torque calculator allows you to figure out the amount of torque your gearbox can theoretically output. It uses the specs VEX provides on it's website. The equations are below.
The Gear Ratio
The gear ratio is calculated as follows: input2 / input1. This converts a ratio into a decimal which is easier to use in calculations.
The Torque Calculations
The equation to calculate the torque is below.
torque of motor based on internal gearing*number of motors/ratio