Like I posted, any motor close to the size, weight and Kv of the BP works well for me as a .049 subsitutue as they spin 6" props with enthusiam.

The milder Speed 400 class outrunners spin larger props and do not give, in my opinion, a reasonable .049 substitution experience. They are OK if you want something mild, though.

The real 1/2A guy wants something with a 5 or 6" prop.....

And with the 2200Kv, 2 cells is more reed valve ish and 3 cells is more Tee-Dee-ish. (Actually, two cells is more than a normal Tee Dee and three cells is ballistic. That is what the throttle is for!)

I have the following Heads up 400 class outrunner (nearly identical to the BP motor listed) in a .049 size delta model and it works great:

http://www.headsuphobby.com/Power-Up...otor-E-557.htm

Also currently out of stock like a lot of the hot 2200 Kv outrunners that size. There is a reason they are popular....