Of you can build a 10 -12 oz airplane, a TD 051 should fly it very well. I've used MAS 6x3 cut down to 5.5x3 on TD 049's and fairly large 1/2A's with good results. If it doesn't fly to suit, I'd recommend a Medallion 09. A TD 09 powers a Jr Flitestreak very well at about 16 oz. I used 57 ft 012 lines to get it slow enough to fly a fast stunt pattern.