Many fly casting instructors put a lot of effort in studying the relation between rod tip path and loop shapes as well as publishing their knowledge about it. Sure there was a lot to learn in that. Besides that significant fewer instructors concentrated on publishing the pros and cons on different rod hand styles. I am not even sure there is a single book presenting most of the common rod hand styles - especially related to the size of arc.
Al Kyte some years ago published his book “Guide To Better Fly Casting”. It includes a chapter about “arm styles” offering some excellent information though.
As an instructor watching my student’s rod hand movements is among the very first things I focus on before the lesson starts. The huge advantage in watching the rod hand path instead of trying to follow the rod tip is: SPEED. The rod hand moves at much less speed making it much easier (not to say possible) to observe it with just my eyes.
You think I am wrong and fly casting is based around rod tip movement?
Then please be welcome to the Sexyloops board. You may start a thread and we hopefully will have a nice discussion and learn more about the fly casting details. Good time of year (right now) to do so – well, here in most parts of (ICY) Europe that is!?
Casty week to all of you!
All my best
P.s.: Oh, you couldn't see the rod tip? Well, you may just assume it was moving along a perfect straight line most of it's path. ;b