If so, approximately how much?
Heck good question... but now that I "think" about it, if a fixed blade and mechanical hit the exact same surface or animal... I would imagine the mechanical would slow down, lose more energy, more than the fixed.
Good point. The aerodynamic shape of BH's makes wind friction a non issue at bowhunting distances.....but from the side, in the case of a cross wind will have an affect....[including the fletching]Agreed At distances I Archery hunt any difference would be negligible. Wind drift may play in more than velocity.