Cim-u-lator Gearbox

[billbo911]

Originally Posted by mehrkam

We have had some trouble with a dual CIM-u-lator using 2 550s. For some reason the motors overheat extremely fast. We mounted this on our test shooter and instantly had smoke coming out of them. The only way we could run them was to put the big cooling fan blowing down on top....

Did you make a provision for allowing cooling air to enter the front of the motor?
If there is no air flow through the motor, it's going to heat up in a hurry!

As an example, the FP motors come with this orange plastic ring around the central hub of the motor on the output shaft end. If you leave that ring in place when mounting them on a CIM-Sim or CIM-u-lator, then air can flow in. If you remove it, the motors stop breathing.

One simple option you can try is drilling four holes in the motor mounding plate in alignment with the vents in the motor. The larger, the better..... to a point of course.