I ran the props Andrew sent to me today. We had a high of the mid 40's, cold wave for us, though there was hardly any wind, so I went out. I'd have to say that they were a great success. I tried #2 first since it produced the max. RPM on ground test. Response was great, pulling power was better than the APC 12.25 x 3.75. I have no idea why Andrew's version pulled better, but I had to drop my dual rates by 20% across the board to realize comparable performance. The APC must flex more than I realized, where Andrew's did not. I allowed a friend to try #3 while I ran #1. I firmly believe that #1 had the best response rate, though it should since it was the lightest. I may have been my imagination, but I believe that it was better than #2, though barely. #3 was better in throttle response than the APC, though should be. #3 didn't perform as well as #2 & #1, though expected.
I want to thank Andrew for giving me the opportunity to test these props. They worked fantastic!
Kevin