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118ft trout distance cast

Purpose

The purpose of this section is to show:

· Results for a simulated trout distance competition cast about as measured by “U. Röijezon et al”.

Input, casting strokes

The competition cast is presented as two simulations:

1. A periodic 80ft false cast.

2. A 118ft delivery cast, starting from the periodic false cast.

The 80ft periodic false cast and the 118ft delivery cast were calculated using the following boundary conditions:

Notes:

· The max angular velocity, the max translational velocity and the max haul velocity were given values about as reported in “U. Röijezon et al, An Initial Study on the Coordination of Rod and Line Hauling Movements in Distance Fly Casting”. Also, the relative timings of the max velocities were set to agree with reported values.

· The boundary condition graphs above are shown for one period of the 80ft periodic cast.

· Compare with 133ft trout distance cast.

Input, equipment

Accurate rod data for the specific rods used in “U. Röijezon et al, An Initial Study on the Coordination of Rod and Line Hauling Movements in Distance Fly Casting” was not available and therefore, rod data for a 10wt rod was used in the simulations:

Notes:

· The fly line data is set to model a Scientific Anglers Expert Distance 5wt line.

· The leader has a diameter about as is used in competitive casting.

· The “fly” attached at the end of the leader models a “piece of yarn” with a terminal velocity at free fall of 1.2 m/s.

Output, animation

Click on the graph below to start animation.

Comments, animation:

The animation shows comparatively small loop radii for the periodic cast and for the delivery cast. This is a requisite for longer casts and depends on how the rod is loaded i,e., the relative magnitudes and timings of angular motion, translation and haul. Competitive casters manage this “balancing act” and many produce casts longer than the one presented here.

Output, graphs

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

Output, energies and work