RE: conditions
jimmyjames,
I have a 91FX and reading from the manual..........for sport, OS recommends 15x8, 16x6 or 8, 17x6 or 14x7(3 blade).........for aerobatics they recommend 13x11 or 13 and 14x10 or 11. I'm flying mine with a 15x8 and it flys great.
Andy