I also couldn't agree with you more about energy and the amount needed but their are some that do as well as a 3 bladed fixed head.
Which was the point I was making in reply to your earlier comment:
We really need to get passed this because good mechanicals are as dependable as good fixed,if not more so.
That statement equated ALL 'good' mechanicals with ALL 'good' fixed blade heads, without regard to design, cutting diameter or energy requirements.
As far as testing in artificial materials, if you believe in them, then I can show you a test that will prove beyond a shadow of a doubt that there is no mechanical or fixed, replaceable blade head that can penetrate better than a 2 blade cut on impact. Steelforce has a video of such a 'test', one they were playing at the pro shop one day. Bag target, 70 pound compound, carbon arrows, shooting replaceable blade fixed heads and mechs. The fixed and mechs would penetrate about 6" and stop. The Steelforce heads constantly blew right through the bag and stuck deeply in the foam backstop behind it. Then they shot the Steelforce head through the bag using a 45 pound recurve with the same results.
I consider that test to be just as valid (or invalid) as any other test using artificial target mediums.
Of course, then there are Dr Ashby's findings from his Africa broadhead effectiveness study.
