Ya but the dimples go the wrong way. Maybe speed whistlers
Exactly. Speed whistlers are a better idea than a baseball card clothes pinned to the cowling for the propeller to to make noise.
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Jayson
RV-12iS
E-LSA
“Never feel sorry for a man who owns a plane.” -Charles Morse (Anthony Hopkins) Movie - "The Edge" https://youtu.be/dJD0lB4zRes "...except during the month of Annual Condition Inspection." -Me (in the hangar)
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"My first wife didn't like airplanes." - Gordon Baxter