RE: Prop for a Pulse XT 60 w/ Evolution .61?
With a 13 X 4W prop my Evolution .61 in a Twist 40 I am turning 11200 RPM + or - & it will go vertical with no trouble. In my H9 Corsair I am using a 12 X 6 on a Evolution .61 turning mid 12s & it is a very good match.