Home About Basics Casts Theory Verification References Contact

50ft oh casts, comparison incl. and excl creep

Purpose

The purpose of this comparison is to show the impact of creep.

The comparison is made between two simulations:

· The 50ft oh ref. cast without creep.

· “50ft creep” with creep. A cast with creep is a cast in which the rod is moved forward in the angular direction before the rod acceleration is applied. Creep reduces the arc during acceleration and increases the angular acceleration. Creep may cause tailing loops.

Input, casting stroke

The angular velocity, shown for the two cases below, is the only input that differs between the two compared cases.

Output, animation

Click on the graph below to start animation.

Comment:

The cast with creep produces a dip in the rod tip path and a tailing loop i.e., the line is crossing itself before straightening. Also, the cast with creep shows reduced loop speed and is less efficient. Creep is known to be the culprit of many poor casts by beginners.

Output, graphs

The graphs considered most relevant for the comparison are presented below. For explanations to the graphs please see the 50ft oh ref. cast.

Output, energies and work