Read the second post of this thread (and the other replies by opjose):
http://www.rcuniverse.com/forum/fb.asp?m=7361348

I think you're refering to the special trainer prop that has blades that look like paddles.

Among other differences the plane should glide more freely with a normal prop. This will of course change how landing approaches work out with your alpha 60.

Normally that would be true, but I think the prop he's refering to is the H9 PTS prop. Have a look at one. They are totally different from other props.