Larry,

I have tried many different props and did RPM and pull tests on them. APC props do spin the fastest in the big 22" sizes, but actually pulled far less than say a Xoar or a Mejzlik. I found that in the smaller sizes like say a 16x8, then an APC would do better. The APC just gets so thin in the larger sizes like a 22x8. I have also flown all 3 mentioned 22x8's and the Xoar and Mejzlike flew the plane the best. It was a GP Christen Eagle. You should try the Xoar in flight. They seem to do a great job and on the stand pull a little harder than even a CF Mejzlik. The G62 will pull like a bear with a Xoar 23x8

Scott