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Reality Check
Posted by Dodd Stacy.
Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.
Posted on 2/9/2000 9:31 PM MST
In Reply to: Try this: Year of the Flaming Victor (or Motor) posted by Joe Johnson on 2/8/2000 2:06 PM MST:
I hate to be a wet blanket on the 20 mph robot business, but let's put some numbers on that. A 130 lb robot traveling 20 mph possesses a kinetic energy in excess of 2,000 Joules (sorry about the mixed units, but this is America). I believe Joe has cast the drill motors as about 250 watts (J/sec) of max power output each. Postulate lossless CVT transmissions that allow the two drill motors to run always at their peak power rpm as the robot accelerates from rest to 20 mph. We need 4 seconds for 500 watts worth of motor to increase the kinetic energy of the robot by 2,000 Joules, to accelerate from rest to 20 mph.
Anyone care to calculate whether the robot will achieve the 20 mph velocity before hitting the end wall?
Dodd
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Our opponents didn't know where our robot was going and neither did we! - ReapersRule [more] 
23-06-2002, 23:04
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