Beginners, keep in mind that props differ greatly EVEN WHEN THEY'RE THE SAME DIAMETER AND PITCH. I just collected my notes on the props I'd tried on the new OS55AX to email to a buddy who was thinking about trying a 3blade on his 55. I noticed when rewiting the notes into one place that I'd recorded more tests for 12x6 props than any other. And that the largest range of performance had come with that bunch.

So get over the "sound byte wisdom" that surrounds our model props. It might all be true, but it's just words.

There is significant difference between individual props that the detail of each prop means nothing. And that includes 2 vs 3 bladers.

There is significant difference between a single manufacturers props of the same type. And if you've ever measured many props' pitch with an accurate pitch gauge, you'd know that the pitch number a mfg chooses to stamp on his products seem to be a suggestion of how he thinks it might perform more than what actual pitch scheme his machines produce.

As you gain experience with props you find out the only reliable "wisdom" is to simply try whatever fits the prop shaft and has ground clearance. And the theoretical differences don't mean spit when one mfg's 6" pitch doesn't even match up theoretically to his 6" pitch on the next diameter of his same style prop. Sometimes the pitch increases out the blades different as well. And differs not just by that mfg's style.

You can talk theory all day long, but it won't put the theory into the prop blades you buy from the LHS. The only thing that seems to be "true" about the props we buy is the diameter. And if you've ever measured pitch it might amaze you the mfg's bother to produce 12" diameters that actually are 12".

Don't ever decide not to test a prop because of some conventional wisdom about props. If the prop fits, try it. You will be surprised.