This depicts a propeller's pitch at a given radius. The legend shows the pitch is graphed at the 4, 5, and 6 inch radii. The COMPROP 4 blade 13.5 x 22 pitch is in the upper left quadrant, a Mercury 23 pitch 3 blade aluminum is in the upper right, below are a Mercury 21 and a Michigan 21.

Please notice how closely the blade's pitch lines are is grouped on the COMPROP propeller compared to the other props. The Mercury 23 displays tight tolerances; the Michigan 21 and Mercury 21 are not as consistent. This chart shows the COMPROP is holding tolerances as tight or tighter with 4 blades as the best competitive aluminum propellers are with 3.