No, but by running a couple of props it gives people a basic benchmark to compare to. On a forum it is about the only thing that will come close to comparing things fairly as all we have is the ability to type figures. Is it accurate, no, but it does give a good idea of what to expect. All of my planes I currently fly are propped to turn in the 6's. When it comes to flying it will depend on the airframe in conjunction with the engine as to what prop performs the best. That will only be decided with flying it. In this case it will most likely end up being somewhere between a 20x12 and the 22x10 as this is first going into a warbird where speed not 3D ability is desired.....