Would be grateful if someone can educate me with the 'formulas' used for calculating the AMO & IBO speed of a bow. I've used a laser speed meter on my bow and recorded speed (FPS) of different arrows, (carbons & aluminium)..but would really like to understand how this speed could be calculated using a formula. The draw length, draw weight, shaft weight/length must be all part of getting the speed of the arrow--but there must be a way of calculating this speed using a mathematic formula...isn't there?