RE: Heavy arrow, more KE....light arrow, more speed..??
Actually I disagree.
A bow maxed out has a certain KE regardless of arrow make up to a point however a heavier arrow carrys more momentum.
When you go heavier on an arrow, obviously you gain weight, you loose speed, they offset each other in KE unless extremes are taken.
When you go lighter in weight, you gain speed again offsetting each other and maintaining the same KE unless extremes are taken.
Now we're talking 1 or 2 ft lbs. ...
I don't know of any bow today producing 100% KE....are you refering to 100 ft lbs?
My Allegiance is shooting all but 80 ftlbs of KE, it's tough getting more without longer draw lengths. I know some are pushing more.....