Bill - the July 2021 issue of Kitplanes has an article describing exactly how I do prop comparisons - the test cards are a natural fallout of the procedures.
Paul
__________________ Paul F. Dye Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
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