I started with an evo 46 with a 3 blades prop.

I was completely amazed at how much more power was available when I used a two bladed prop.

I wasn't expected that HUGE of a difference!

I had an LT 40. With the 3 bladed prop you kind of had to watch the attitude during take off. Had to keep it fairly level or it would want to stall. With the two bladed prop that was far from a problem! It would practically go up at a 45 degree angle no problem (if my memory serves me right, thats been almost a year ago).