"Jeff Osier-Mixon" wrote in message ...
"Less noise" and "better climb rate" are what got me. Others with the
same plane/prop combination report a loss of about 1-2 knots, but an
increase in climb by 100fpm. That can make a big difference in a weak
climber like the Sierra.

I'm about to switch from a 2 blade to a 3 blade on my Navion. Of course, I'm
also adding 40 more HP, so it will be hard to determine...