About how fast in m/s is VEX 2 CIM BALL SHIFTER with 36:12 gear ratio?

[apalrd]

Originally Posted by Popmaster288;

1325065The CIM motor at max power runs at about 2600 RPM...Realistically, the CIM motor won't be running at 2600 RPM to begin with....After all this is taken account of, you might be looking at something closer to half the speeds of what I gave you.

CIM free speed is either 5310 or 5500 rpm depending on what spec sheet you look at (the vex spec on the website is 5310) and your robot could go as fast as 90% of that speed. Peak power is at half of free speed (and half of stall torque, as torque is inversely proportional to speed).

The gear ratios for the vex pro shifter you listed are 12:40 on the input (motor to first stage) then 40:44 high and 24:60 in low gear. I'm not sure where the previous poster got 12:36 from.

With a 4" wheel I get 7.77 m/s with no speed loss (5310 motor rpm). That's 25 ft/s and very very very fast.