As you go lighter and lighter the transfer of energy to the arrow becomes less and less efficient ultimately to the point where you are dry firing the bow. This of course is the most ineffiecient as all the energy is wasted. The rate of change in efficiency with arrow mass does change but the change in efficiency is always negative when lowering arrow mass and positive when increasing it.
Well try to shoot a 3 pound arrow and the measure it and let me know your results
There is also a point at which as you increase in arrow weight when you get above that point you begin to loose efficiency. (it works just like the light arrow thing only backwards
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do not believe that Norb Mullaney ever said that efficiency goes up when you put on a lighter arrow. If he did he was incorrect. You could put on a lighter arrow and increase KE if you also made some other change to compenstate for the loss in efficiency. For example increase draw weight or lower brace height.
So you are saying that it is impossible to design a cam that will shoot a light arrow more efficiently than it will a heavy one????????
