How do you use a DC motor to test the work of a flywheel?

[ME-student]

How do you use a DC motor to test the work of a flywheel? I'm trying to test the mechanical efficiency of a wobbler oscillating steam-engine. To test the output of the engine I was going to use a DC motor. Included in my calculations do I need to include the efficiency of the DC motor? If so, how would I do that?

 

[stewartcs]

Here is one method that is commonly used that you may prefer:

http://www.kostic.niu.edu/motor-perf.html

CS