[jreuter]

Al:

This is an forklift/elevator belt running off a 3" diameter timing belt pulley, so there is near continuous load, except for a small increase when the 2nd section of the elevator starts to lift.

The motor is out in the open with no obstruction to the air-in/smoke-out holes.

Ether - you are right. The lecture materials I remembered had alot of discussion about finding the peak power point, but also noted the manufacturers typically recommend a normal operating speed at some high percentage of the free speed, such as 80%.

The good news: we should be closer to that 80% before we are done. The bad news, operating at 40% may be too much for the RS-550s to handle, even for 2 seconds at a time.

-Jeff