Performance Propeller
I run one on my RV-4 with a hotrodded IO-360 PV. It’s smoothness is unsurpassed and I’m capable of 220 mph speeds.
Frank from Performance who was trained by Clark Lydick the founder of the company who actually got his start from Bernie Warne. Long line of craftsman but sadly no more. I bought a spare for my plane before Frank hung it up so hopefully Im good for awhile. If you get the chance to try one you won’t be disappointed as long as you get the desired pitch that meets you compromise of climb vs cruise.