I run an 11x6 apc on mine in an ESM extra.I've tryed a 11x7 and it looses out in the vertical..

You will just have to buy a few props and find out which one works best for you plane and motor combo..

I have got about 12 diferent props that range from a 10x6 to a 12 x7 i the quest to find the best prop for a certain combo.