OK - well it will be interesting to see how good they are at predicting performance. The number of variables involved would stump most models.
The usual assumption is that adding 1" pitch looses 2-300 rpm but adds 2-3 knots of top end speed (if it can get you there) - but that can go horribly wrong. And that's if you stick wth the same types of prop that you already have - not to mention 4-bladed, 5-bladed, duo props...etc, etc...
However, the weather has been reliable lately...
