Look boys & girls, there really isn't a real-world debate about this stuff, just here in the beginner's forum. Since you don't seem to be inclined to believe me, ask Burt Rutan why he DIDN'T use a 3-b prop on Voyager -- it wasn't because he couldn't afford one. Ask the Reno racers why they can't use 2b props (they sure would like to if they could). In the modelling world, ask Chip Hyde & ALL of the TOC competitors, & the pylon racers, & the RC speed freaks, & the CL speed guys, & the IMAC pattern guys why they DON'T use 3-b props.

In the case of jeepindog's situation, there is a piece of missing information -- he obviously is unaware of it -- but it is there nonetheless. For example -- does the manufacturer of jeepindog's engine recommend the 14-6 for normal flight activities, or for break in?

BTW I have flown many hrs in T-6s (Harvards actually) & in early T-6s the tips would go supersonic shortly after liftoff if you didn't keep the nose up to maintain engine load -- it is a classic case of being underproped for the power (like jeepindogs 14-6). The decision to use a 2b prop in the case of the T-6 involved availability, weight, & economics (after all, it was only a trainer). The T-6 runs just fine at climb & cruise power -- & that's where airplanes fly. A three blade would have incurred a significant engineering design cost, production cost, & weight penalty -- and was not actually needed in the intended application for that aircraft.