Can you mount the tires directly on the gear box?

[Jack Jones]

Originally Posted by UlTiMaTeP

Chances are it will but you really wouldnt want to do that, the speed would be too fast with no step down. The torque curve wouldnt match up to the speed and load.

No problem with speed if you use smaller wheels. With a CIM and that 12:1 transmission and five inch wheels, you'd go about 8fps.

[Daru]

Originally Posted by Jack Jones

No problem with speed if you use smaller wheels. With a CIM and that 12:1 transmission and five inch wheels, you'd go about 8fps.

We calculated that we would go just under 9fps if we ran the kitbot wheels (6") on the 16:1 transmission with a CIM. We used the max RPM of 5342, which we got off the FIRST Wiki. Just another alternative

[Madison]

Originally Posted by Daru

We calculated that we would go just under 9fps if we ran the kitbot wheels (6") on the 16:1 transmission with a CIM. We used the max RPM of 5342, which we got off the FIRST Wiki. Just another alternative

Remember that the 5342 RPM number is the approximate free speed of the CIM motor. When placed under load, the motors will run quite a bit slower than their free speed.

[Daru]

Originally Posted by M. Krass

Remember that the 5342 RPM number is the approximate free speed of the CIM motor. When placed under load, the motors will run quite a bit slower than their free speed.

Interesting; I was under that suspicion but I assumed that the drop in RPM would be fairly small. In that case, my question becomes: How can you accurately calculate the FPS of the robot based on the loaded speed of the motor?