Now that the bandages have come off my hand, I can type again...
We have a 60-tooth gear meshing with the 16-tooth portion of the Chiaphua pinion, which gives a 18.3:1 reduction. This is driving a 5.25" diameter wheel. At 5500 rpm from the Chiaphua, you get a design speed of ~ 5 fps at normal load (modified by the efficiency loss from the gearbox, which we have not measured yet).
-dave
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Team 116: Creating the technologies of tomorrow, sometime late tonight.