I have the 1.20 size. 78.7" Super D. The 15 or a 16" prop looks good on it. I'm definately not expecting a hot rod.

AJsToyz. You'll like large electrics. I have a Yak 54 on 10S 4000 and 5000 packs. Hobbypartz Monster 1.60 and it'll spin a 21" prop if I want. 20 x 8 for good performance. 20X10 and it's a rocket. Heavy though. It's a Nitroplanes and was meant for gas. The power system wieghs around 4 .5 lbs. On the 20 x 10 it pushes over 3000 watts. 2650 on the 20 x 8.