Do a search on the ARF and FunFly boards for a little speculation/ discussion.

Tower says that it won't be available until Late September. Great Planes technical support also says that it would take a 13 inch prop, but not a 14 inch if that will help you. I would think that the APC 14x4 wide would be an ideal prop if you could get the extra 1/2 inch ground clearance somehow.