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by Dirk le Roux
Wed Oct 02, 2019 7:46 am
Forum: Flycasting Physics
Topic: Dolphin nose on the back cast?
Replies: 14
Views: 982

Re: Dolphin nose on the back cast?

A good example of a back cast dolphin nose can be seen in Graeme's cast analysed in this thread.

On that back cast-forward cast sequence, it was the narrower initial loop that had the dolphin nose.

Regards,
Dirk
by Dirk le Roux
Fri Sep 06, 2019 8:22 am
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

No credit required Graeme. A 170° cast would be interesting too, but I meant 1) a tethered cast coming as close as possible to "obeying" the 180° rule, according to Paul - his accuracy cast, where the line does not linger so much below the loop plane and 2) a simple overhead shoot cast, short for th...
by Dirk le Roux
Fri Sep 06, 2019 6:01 am
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

Graeme, you are welcome to use it. It is you cast after all. And it does look like art, doesn't it? Apart from an accuracy cast, or anything that comes close to "true 180" if such a thing is possible, I would also love to have a short (so the camera doesn't need to be far away) shoot cast to analyse...
by Dirk le Roux
Mon Sep 02, 2019 2:33 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

Now including the forward cast’s stroke pre-RSP, here is a consolidated fingerprint from Graeme’s normal cast footage, from back-cast stroke pre-RSP/prequel (on the left below the gap) to final turnover of the forward cast (on the left above the gap): composite_all.jpg The blue lines represent the l...
by Dirk le Roux
Wed Aug 21, 2019 8:33 am
Forum: Flycasting
Topic: Straightening the bottom leg of the loop
Replies: 32
Views: 1869

Re: Straightening the bottom leg of the loop

Bart, could you film the rear part of line during your back-cast from the beginning of roll-out up to the end of your forward stroke? From these observations , I suspect the orientation of the trailing leg behind the sag, rather than the sag itself, to be responsible for the tick dangle going that l...
by Dirk le Roux
Fri Aug 16, 2019 11:40 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

Truly excellent Dirk! I shall endeavour to find somewhere suitable to film loops. I’d love to have both accuracy as well as distance loops analysed and contrasted. Maybe also some dynamic rolls and aerielised snaps. Only a pleasure, Paul Those would be nice. I'm sceptical though of the feasibility ...
by Dirk le Roux
Fri Aug 16, 2019 11:31 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

FORWARD CAST FINGERPRINT TRACE: Here’s the forward cast’s fingerprint trace, starting from loop formation: composite fc.jpg Bumps like those discussed in the previous back-cast section can be seen, and their shape- and spatial path evolution show similar characteristics to those previously discussed...
by Dirk le Roux
Fri Aug 16, 2019 11:16 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

RISE AND FALL OF LINE MARKERS DURING THE FORWARD CAST: Due to the incomplete possible traces, a full look at vertical acceleration from RSP, therefore markers’ overall “fall” history, could not be obtained for the forward cast. Nevertheless, with the forward cast the same correspondence of up or dow...
by Dirk le Roux
Fri Aug 16, 2019 11:11 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

On to Graeme’s (normal cast) forward cast. INITIAL CONDITIONS FOR THE FORWARD CAST: • Line slope early during the stroke: FC start slope.jpg As the line was not straight, like it was (almost) at some point during the beginning of the back-cast stroke, I measured two ways of considering the start slo...
by Dirk le Roux
Thu Aug 15, 2019 7:53 pm
Forum: Flycasting Physics
Topic: Analysis and Observations on Fly Cast Video Footage
Replies: 30
Views: 2657

Re: Analysis and Observations on Fly Cast Video Footage

I wanted to get to the forward cast but got interested first to look at the prequel to Graeme’s (normal cast) back-cast. Near the end of roll-out from the previous forward cast, we see the line configuration looking reasonably straight with a fair-looking loop: kick-over_1.jpg The fly line tip went ...

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