Thanks for the info,
The 65 is flying that prop at ~ 9100 rpm. Not sure what peak is, I check next time out.
I may be wrong, but I am thinking the 62 likes a smaller prop at higher rpm where as the 65 like's a larger prop at lower rpm.
Any how that 62 sounds great for an every day sport plane. One of the guys at the field had one in a FokkerDVII. I think Uravitch drew up the plans. It really pulled that bipe around and sounded good doing it.
thanks again