Yes, from what I remember it does have an enormous Cm The guy who did the airfoil design is not in town anymore, so I would have to ask around to track the data down. I think the airfoil was analyzed using MSES, but never tested in the wind tunnel. The data should still be somewhere.

The main problem with that design was the huge amount of drag associated with that airfoil at higher lift coefficients. You will remember that its final attempt with the 21lb load had it take-off in a very short distance, but it then ran out of steam due to all that drag. It climbed out to about 20 feet and was even landed again before the end of the runway was reached. In retrospective, Mike should have kept it on the ground longer so it would take off at a lower CL, but hindsite is always 20/20. Wish I had time to get involved again this year, but my thesis is consuming all my time. It is projects like these that made being a grad student again for a while so much fun

I will try to find out for you what the Cm of the airfoil was.