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Originally Posted by Greg Needel
just for general knowledge assuming close to complete transfer of speed to the ball you threw that ball about 50 meter/second well over the maximum.
If you you kept the same RPM and used a 3 inch wheel you would be right on the speed limit of 12 meters/second
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We're not sure about that. The ball doesn't go that fast based on timing and measurements from the video - it goes about 2X the max speed. The motor doesn't provide much torque at that gear ratio (1:1), so all the energy comes from the rotational momentum of the wheel.
We'll continue to experiment and figure out how large of a wheel we really need both in diameter and weight. I just want to make sure for the benefit of those designing prototypes without the ability to do testing that everyone understands that in this case it's not a matter of motor torque.