The rod is an integral connection
between the fisherman, the fish and the current of the river.
The physical action of the fly-fisherman moving the rod
(system) forward and backwards has a direct effect on the
motion of the rod, the line, and how the fly reacts. The
energy produced by the human body transfers through the rod,
line, and into the fly and surrounding air mass and water
system. While you are fishing you can feel the energy of the
river in your hands while you hold the fly rod. The river
causes vibrations in the pole which transform through the
lure, the line, and then into the fly rod. The strength
of these vibrations varies with the weight and strength of
your fly rod. The same could be said for the size of
fish you are catching.
(Credit: Bill's Forum)
Discovery magazine has a great online
article with this quote that describes the Fundamentals of a
cast, which is in turn attached to a thicker and much longer
braided line. The trick is launching the virtually perfectly
“While other fishermen lazily dangle bait in the water,
fly-fishers sweat over strategy and technique, struggling to
imitate with rods, lines, and lures the delicate landing of a
fly on the river’s surface. To catch a fish, a fly-fisher
sends out a wispy lure attached to an almost invisible 7- to
15-foot-long leader weightless fly to a distant spot with
deadeye accuracy. The thicker line must hit the water first,
allowing the leader and fly to then gently alight upon the
water just the way an insect might settle on a ripple,
persuading the prey (trout and salmon, often, or perhaps a
largemouth bass) to bite.” Below, is a video discussing
the physics, grip and casting technique of a fly rod.