Quote:
Originally Posted by Ether
16.8 watts max power output w/o gearhead
= 12.4 ft-lb/sec
x2 motors = 24.8 ft-lb/sec max power output
2.3 lb estimated robot weight
(24.8 ft-lb/sec) / (2.3 lb) = 10.8 ft/sec (neglecting friction)
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Here's a different way to get at approximately the same point.
At kick off, the video of the FIRST built minibot showed about 1.3 ft/sec for a robot that looked to be more than 5 lbs and using a pair of Tetrix motors and gearboxes.
Its not hard to cypher that a 2 lb robot can be 2.5 times faster than a 5 lb robot. By the same token, if you throw away a near 50% inefficient transmission, you should be able to obtain another doubling of speed. That gets you in the 7-8 ft/sec range. Add additional lowering of friction in the attachment to the pole mechanism and you approach the magically 10.8 ft/sec. Add topping off the battery to get to a better motor curve is gravy on top.