I am extremely happy with the NX 22x8 for a break-in prop. Turning 6800 rpms with the Slimline Pitts muffler on the DA-50R. That prop flies the plane very well...I have the NX 23x8 for after break-in, we'll see if there's an improvement when I switch after a couple more gallons with the 22x8. Some favor the 22 inch diameter props for a little less engine loading even after break-in, helps keep the engine cooler and allows a slightly higher RPM during slow speed aerobatic maneuvers like 3D. Great for planes where you rarely use full power.
