ORIGINAL: Buzzed
Little Kyosho Gee Bee with a OS 46. Prop is an APC 10-8.. Plane "almost" taxies fast. We managed to get it airborn once and it wasn't pretty. The owner lost interest in this one. No thrust to speak of. Might try a 12-4 or something some day[:'(] Buzz
A 10" diameter really doesn't give a 46 much to work with, no matter what the pitch. Mine seem to prefer 11" and 12" diameter. Almost any pitch 11" and they seem fairly happy. The OS46s work decently with 12" props. But those 12"ers can't have a lot of pitch. I've found that a 12x6 is maybe the limit for pitch. What you want with that Gee Bee is more diameter than that 10". And your OS will turn more diameter with ease.
I've found that my 46s did ok with 12x6 but were sounding a bit overpropped in the air. So I trimmed a couple of 12x6s to 11.5" diameters, rebalanced and tried those out. Bingo.