well, I don't know about where you people live but where I'm at, the prop pitch situation is a little different.... I have a Prather prop pitch gauge. That I measured a lot of props with at one time trying to find out more about the variences between sizes and brands of props.

The whole outer half of the prop is like it says (for example, 10"diameter-6" pitch). This takes into account each and every incrimental diameter between 5" and 10". But to measure the inner half everything gets all screwed up. The amount of pitch falls dramatically to around 4" of pitch at the 2" diameter position and anything smaller diameter than that is not worth measuring.

Yet to look at this same 10-6 prop by eye, it appears to have substantually greater pitch on the smaller diameter rather than less pitch, Just looking at thesame prop, I would be willing to say that it appears to have 12" of pitch at the 3" diameter position.

Get out your trig tables and calculator, measure the angle at a particular position on a prop and compare mathmatically?

Enjoy,

Jim