Well I figured 4 oz of lead at the tail wasn't the greatest. I really don't know how overweigtht the plane was but it was alot heavier than with just a .40 engine in it.

Since it is a trainer and has small control surfaces I just maxed them out. They went to about a 45 degree angle. I did this to give myself more control but now I see how it might have led to me stalling in this situation. I probably gave it full up elevator to do the half loop figuring I would be gaining speed going down anyway. I might have even stalled slightly before the half loop started which really would have sent the airplane down fast.