Nice test David - thanks for sharing the data.

I have to admit, the APC result you got is a much higher rpm number than what I was expecting (that'll teach me for specifying rpm numbers!). I am now starting to wonder if there is more than one APC 11 x 6 design available. At our field, the best sport .46s are doing between 12,200 and 12,400 with the APC 11 x 6 whereas they will do near 14,000 rpm with the black MA.

Your test gives Pe Reivers a nice set of numbers to calculate new prop load coefficients for the 11 x 6 size.