Britbrat:

As one AE to another, you're not going to convince these guys. They don't care about the science. They have compared a 14x6 to a 13x8 and come to the conclusion that the 13x8 is more efficient because it has more blades. You and I both know that it's because of the pitch and the relative AOA of the blade. Furthermore, we both know that the only, I repeat, the ONLY reason to add blades is to reduce diameter and the cost is EFFICIENCY. But how is the guy that designs aircraft for a living going to convince a stick jockey of anything? Good job on trying to clarfiy things. I can vouch for your analysis.