Sorry, I had the names of the joints wrong. I'll use KJS = knuckle joint segment, MJS = middle joint segment and TJS = tip joint segment.
git-box says: "There's a firing order to the joints extending or flexing where at times the joints are flexing simultaneously or extending simultaneously and at other times they are flexing while extending. Then there's the moment when a joint is changing directions where it is standing still. We'd like to believe that a complex system can be described in simple terms, and sometimes that is all a student needs to succeed, but that doesn't change the fact that the movements are more complex than is typically taught or can even be seen in real time"
Ain't that the truth. I don't think anyone has mentioned this (they might have), but if the initial flexion phase didn't come primarily the KJS, the finger tip would miss the string. At some point the KJS must be stationary - probably immediately after the tip is through the string. At some point the MJS must be stationary - probably just at the instant that the KJS begins it's next flexion. You would probably need some high definition slo-mo video to verify this. This is predicated on the fingers being generally in mid range at the onset of the stroke. Of course for rapid free strokes the flexion phase must begin before the KJS reaches its full natural extension. I'll go out on a limb here and say that the limiting velocity factor is that the MJS joint must make it it's full natural extension, i.e. it may be that you cannot shorten the MJS to increase velocity, again, I say this because the tip would miss the string on the next stroke if it wasn't in position. I'm just pulling this out of my a**, BTW.
Last edited by kmurdick on Fri May 12, 2017 8:31 pm, edited 1 time in total.