IIRC, Roy Marsh's plane, the 'poster child' for the original KR-2S promo 
literature, used the 23012 airfoil, which some of the Beech and Taylorcraft 
aircraft have used.  Per NACA airfoil nomenclature, that makes it an unreflexed 
12% thickness airfoil.

I have no information on how Roy's plane performed other than I believe it was 
the basis for Rand Robinson's claim that the KR-2S was a 180 MPH airplane.

Oscar Zuniga

Medford, OR
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