Wood, Zinger 22x6 2 blade, rpms in the low to mid 7ks, 20-22lbs thrust give or take. All just a good guess. Lot depends on carb and muffler you use. The 3-4 blade props have pros and cons. Yes there quieter but they loose efficiency because one blade follows closely to the one before its' turbulence. They also have better braking affect on the plane, you dont need it.

For pulling power go big with flat pitch, for speed go with small dia. and high pitch.