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oh, one more thing that we forgot to mention. Our robot can shift gears, by sliding the already made shifter on the drill motors.
we used a couple or modified metal pieces and the two servos under both the drills motors.
The robot shift beautifully, although we have to stop before we shift. To date we have not had any grinding of the drill gearboxes due to poor shifting. (only when the drivers were going forward while shifting.)
In high gear it will scoot around at about 3 m/s, which is pretty fast. In low, as we mentioned, it will pull a car and a van.
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