ro347,
I taught myself how to fly May of 07 with a Nexstar. Bought the Pulse for my second plane, wanting to move to warbirds. Have put about 25-30 flights on the Pulse. I can do a little more that what I guess would be called "basic" aerobatics, but teaching myself is a little scary. Trying to learn how to use the rudder as much as possible. I have tried some manuverers that I shouldn't be trying yet. Fortunately, I was high enough to recover, but sure made my heart skip a beat! Have played around with the high rates on the control throws, which is a blast. The plane changes direction so fast, or seems fast to a novice like me. So, I my not be the best one to ask questions about enough power for aerobatics. But, just to give you an idea, with the OS 46 AX, I can pull straight up for several seconds, and then it stalls and falls over. I have tried to hold it in a "hover" at about 150-200 feet high (not wanting to crash), can keep it there for a few seconds and then it falls over, but I am sure I don't know what I am doing. I would think anything bigger than the 46 would be enough. I was thinking next year, I might put the OS 55 (same mounting as the 46) just for fun and to see what would happen. Hope this helps.