I use the APC 16x6. At my elevation I can't pull the 16.5 x 5 and the 17x4W doesn't offer enough thrust to do nice Waterfalls. But, I use the 17x4W if I'm in a hovering mood. It's amazing how much easier it is to hover a plane with the 17x4W. It doesn't provide as much overall thrust which hurts in in some maneuvers but it provides the right kind of thrust for hovering. APC is the best.

So...I guess you need two props. Unless you go to one of my special hybrid "sewn" props. That's the ultimate.

thanks
Barry