On the point about arrow KE "including" rotaional, vibrational etc. again he is technically correct with regard to a pure physics definition of total KE but he is absolutely incorrect to say that the KE values he reports in his paper included them because he calculates it the same way everybody else does. KE = 1/2mv^2. Not one term in this equation considers any energy other than forward movement of the arrow. Again, fine points.
What did he measure to figure the arrow's KE, Sylvan? It's velocity or speed of forward motion. Rotational, vibrational, et al. types of motion were not measured and so are excluded by default. They do represent energy that was transferred from the bow to the arrow, but wind up being unavailable to assist with penetration. So, they're relatively unimportant anyway - unless trying to figure a bow/arrow's efficiency right down to the gnat's arse. Like you said, fine points.
