I looked at Mark J's numbers and it is as you say. Mark has a Sturba 54x54 and turns a max of 3200 also and yet his speed is 148. The only difference that I see is that you and your plane are lighter. (Please don't shoot me Mark) If you were to add the extra weight do think the numbers would remain the same. If so, would you suspect that the prop is better??
Orma
