I think that Simplex has fallen into the trap of looking for evidence to support his opinion and not looking at the evidence and forming an opinion. As for his assertion that they thought their propeller was 66% efficient and the modern replica was 82% it is likely that this is because a lot of the Wright's figures are comparative as they didn't always have the mathematical equations we would use see the documented notes other wind tunnel experiments. Also see the evolution of the Wright's propellers 1903 1912. This details how the 1903 designs were copied. Let's face it with 12 hp you would work pretty hard to get the most out of them. Especially since they had worked out that they wanted a constant angle of attack to the oncoming airflow. It shows a real understanding of how propellers worked. Unlike most if not all their fore runners and many of those that came later.