When it comes to the technical side of archery I'm right alongside Oddball in Kelly's Heroes, " I only ride 'em, I don't know what makes 'em work." But why do you think that separation would take place at that point? Surely it would be the point at which the forward movement of the bowstring is less than the speed of the arrow, which does not seem to have any connection with horizontal flexing?Hi TT I was not saying that the arrow stops flexing at or after separation.
The flexing continues from the start of the finger release and is still going on when the arrow hits the target.That has been seen in videos
What I am saying is that the side to side movement of the front of the arrow, stops at the point where the flex is maximum and about to change direction and flex back the opposite way. I think that separation from the string takes place at maximum flex. When the side to side movement has stopped.( or is very slight.)