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Originally Posted by Crebb
I calculated the theoretical top speed using the rpm and gear ratios in the transmissions. The big black tank is for the pneumatics to change gears. The tank is so big that we only filled it once for all the time we were playing with it. We didn't officially clock it at 35 MPH, but we were guestimating. And as for the caster in front, at the beginning it was centered. That thing bounced around so much I couldn't control it. But it was FUN!
The gear ratio in the transmission is 4.17:1 which is about 1247 rpm. Then it goes 1:1 from the transmission to the 12" wheel.
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If the cims are turning 4379 then output at that ratio is 929.7 rpm, with a 12in tire, 48.68fps which is 33.1 mph (fps * .68) gets you mph. If you are getting more than 4379 out of the cims even faster. Way cool
Once this competition is over, we should donate all of these Poof balls to daycares, elementary schools, neighbors; all the little kids. It would make us look good like, "Here's our Toys for Toddlers gift from us upstanding citizens. And we build robots." - atomikitten [more] 
22-03-2005, 15:28
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