I believe you've might have mis-read my Post? I didn't write
I used the Evolution 3 bladed Prop on my O.S. .91FX Ringed True the Alpha has the Evolution 12x4, the PTS Raptor and Mustang have the 3 bladed Evolution 10.5x4.
I run a 14x6 3 blade with my O.S. 91 FX Ringed and my plane flys very well with it.
I ment 14x7.
For those who don't know, Evolution does not make a 14x6 or 14x7, I suspect most people knew that, so I didn't bother to spell it out better than I did. The one I'm using on my O.S. 91FX Ringed is a 14x7 Master Airscrew.
Just wanted to clear things up.
Pete