Perfect you should have no problem importing the data into RC3 then. What is the sample rate and spin up time with your rig?

I originally thought of doing a geared dyno like the miniPRO but now I think the direct drive method is better. Simpler and less losses to account for. I don't really like hanging the flywheel off the motor so I was going to support the flywheel on bearings. Motor to flywheel coupler will need to be a universal or something that can handle some misalignment. Just thoughts right now.

The mass of the flywheel will be a function of the gear ratio you plan to use and the desired spin up time. You can actually simulate a flywheel in RC3 with a little trickery.

If you run into any problems with the import let me know and I will do what I can to help.