Re: Got a Real World Weapons or Armour Question? Mk X
When you release a bow, a significant portion of the stored energy goes to rapidly moving the bow arms forward. They move a shorter distance than the arrow (the ends move about half as far, and the grip essentially does not move), but they weigh a good deal more. Adding additional mass that had to be moved forward (a chain, frex) would take away more of the energy from the arrow.