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Unread 31-10-2012, 01:26
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DampRobot DampRobot is offline
Physics Major
AKA: Roger Romani
FRC #0100 (The Wildhats) and FRC#971 (Spartan Robotics)
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Re: #25 Chain Drive Experience ???

Quote:
Originally Posted by Cory View Post
#25 chain at 5k RPM in general sounds scary. We had to massage our sprocket sizes for our intake to ensure that we would not exceed the rated surface speed of #25 chain and that was substantially slower than a shooter wheel.
In our shooter, our surface speed probably topped 4000 surface feet per minute. We geared up the output of a CIM through chain, which gave us an output RPM of about 7500. It never threw a chain, but it made a noise like the starship enterprise booting up.

For an even more crazy number, our belts (which were what actually touched the ball) had a speed of about 5890 surface feet per minute. That's almost 70 miles per hour. The saddest part: we could barely even make shots from the key.
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