I was able to do 2 loops on AFP sim. The problem is that you can't see the plane when have to go that high and you are viewing it sideways. But it does NOT need much rudder on the up leg, and a ton of rudder and throttle at the 270 position of the loop. Not an easy manuever. Only planes with lots of rudder authority can pull this off IMO. Plus a bigger plane should do it much better than the twitchy, coupling plagued 40 sized ARF's. I used a giant ARF on AFP.