How to build a brushless motor test bench?

[_paralyzed_]

That's nothing new, airplane guys do it all the time using props as a load source, and a wattmeter for data.

There are much better videos out there, but this is the first one I found on a quick search:



You don't need the motor in a plane, a bench mount will suffice, and as long as you use the same prop (load) for different motors the data will show you the real world differences.