Choosing a rod with the right features
Rod action
This often used concept means the temporal characteristic of the bending of the rod under load. If, after removing the load, the rod returns to its previous shape in a split second, this is a very fast action. When it straightens out over a longer period of time, it is a slower build. In the case when the entire whip is bent, it will take longer to restore its shape after removing the load. Rods in which the entire whip is bent, including the handle, are called parabolic.
Based on the name itself, it is clear that the action is how the rod is “built”, from what material, what is its geometric shape and linear dimensions.
The determining factors for the system are the physical properties of the material used - specific gravity, resistance to compression and stretching. A properly built rod, if a weight is attached to its tip, bends smoothly, without fractures, starting from the handle, if any. The bend should not be uniform along the entire length, but increasing from the butt to the top, without sharp fractures and without straight, rigid sections.