The superior prop for any given engine on any given airplane is the one that works best when you try it. I have had props work very well on one engine/airplane combination, and then not so well on another. I am assuming that we are talking about off the shelf commonly available props, correct? Not all of us have the financial where withall to be able to buy 30 dollar or more Bolly and such, so you spend the money on regular, common production props and what doesn't fill the bill, you stash away for the next adventure. Then when you settle on a good prop, you buy 6 more so you have them in case of an accident. That is how you build an inventory for the next adventure. In sizes ranging from 4 inch to 14 inch, I probably have accumulated close to 1000 props in my inventory, but I have never counted them. They just fill several large plastic tubs on the shelves in my garage. Through experience, I usually know about where to start with a new engine/airplane combination and proceed from there. Like anything else in this hobby, you have to work at it.
Type at you later,
Dan McEntee