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Hi Gordy,
I'm entertaining myself with flycasting thoughts this evening. Earlier I sent you a message which addressed some of these things - I think I use the term fly casting anatomy or something like that.
One of the points was that the line is "free flight" somewhat before RSP. At RSP all points on the rod are instantaneously//briefly moving in a nearly purely circular trajectory and therefore the tip is directing the line near it downward and the forward component of this part of the flyline is reduced. So all line is going forward but some near the tip is being dragged down - Jason Borger has a set of rod traces//plots that show this effect well but it is expected from first principles. Perhaps he would be willing to show you this. On the one good record I have the data dropped-out prior to that point. So yes as you indicated, well before rebound the line is in "free flight" and also before RSP. There is nothing good to say about counterflex -- too bad it seems to be a reality in casting. On some future thread we will have to discuss what can possibly be done to remediate the consequences of counterflex -- dragging the bottom of the loop down and watching that annoying bump on the bottom loop leg propagate forward (assuming no shooting of line -- disturbances, like this bump, always holdup and propagate better if the line has tension). Has anyone conquered a way of lifting the rod while it is approaching RSP and counterflexing in order to lift the bottom of the loop upward? I've tried it but am too slow and don't know if its even humanly possible with a full flyline (I think maybe lots of caster do it with shooting heads?)??
That "cheat roll cast" is really interesting. After reading your message I pulled out a butt section of a rod that has a reel mounted and tried it but kept hitting my hand with the reel. Do you need a butt extension on rod? That's an interesting effect -- if you hit a barrier with the rod butt the barrier does no work, adds no energy. However your body can potentially but more resources into rotating the rod because now you can push against the rod and if you're a gifted athletically rotate the wrist simultaneously. If I learn how to do that cast maybe we'll be able to do it on an instrumented rod some time in the future.
Good night - Server
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