thanks for the inputs, the manual recommends 11x6-11x8, that is why I have always used 11x7 for this engine, I had before a mustang pts and an edge, and they flew great with it, but as you said, this plane has lots of weight for the engine size......... do you think that the 11x5 would be too low? why does not the manual recommend it??? I would like that this plane would fly more solid at low speed and that is why I was wondering if a prop with lower pitch would help or if that would not improve the plane stalling at low speed.... would not a lower pitch prop help it to float a bit better?????

For take off, the plane really needs lots of speed to take off..... would a lower pitch prop would make it take off in a shorter distance at lower speed???