I've searched this fourm's FAQ's for this question and have not seen it covered. You'll might have, I just can't find it.

I have a 2.5 ton 13-seer rheem that's a year old with a 2-bladed condenser fan. It's not real loud but the 2-blades seem to chop the air like a Huey cobra gun ship. Woop, Woop, Woop, etc. The units I've seen with 3-blades seem to have a smoother air draw. Is it possible to convert from 2 to 3 blades, keeping the same pitch and overall surface area the same. I would assume that that would keep the CFM flow the same. Any merit to this idea or am I just talking "Crazy Talk"?