Motors and gearboxes from the kit

[sanddrag]

It was designed to use either one or two. Check page 11 of this document: http://www.ifirobotics.com/docs/2005...nual-rev-c.pdf Your speed will not really be affected. The only anticipated problems would be a lack of torque. By removing one motor from each gearbox, you are cutting your torque (and overall power) in half. This may depend on what your wheel arrangement and tread is but you may lose available pushing force. Also, it is possible your robot may have trouble turning. Last, you may experience circuit breakers tripping due to increased individual current draw on the motors (because they are no longer sharing the load with another motor). If you encounter these problems, you can put a smaller sprocket on the gearbox shaft and/or a bigger sprocket on the wheel. And/or use smaller wheels. Or just keep all the motors.

Do you know what speed (in feet per second) your robot is currently geared for?