[Mike Betts]

Originally Posted by Joe Johnson

...Some say I am too conservative but my experience with FIRST and with automotive actuators tells me that these numbers are not far from the right ones.

Dr. J.

As always, your numbers will prove to be very close to the mark and a 40% operation point on the FP puts it close to it's optimum efficiency point (a bit more than 10%). The higher the motor efficiency, the less heat you generate...

I would also note that the "chin-up" occurs at the end of the match and, coupled with the current draw of the motors, your battery voltage may not be optimal. Since power falls off as the square of the voltage, I'd be tempted to design for a two FP gearbox and de-populate the second FP after testing.

This should guarantee success...

JMHO,

Mike