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Search found 1472 matches

by Merlin
Sun Sep 06, 2020 3:11 pm
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Paul It's 160mph for this example, the problem is that we do not have any measurement of the line speed for your cast(s), just the translation/rotation input record. Both peak haul speed (11.8 m/s) and peak rotation speed (920 deg/s) may be overestimated. Nobody believes you can reach 160 mph, even ...
by Merlin
Sun Sep 06, 2020 8:44 am
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Another run(simulation of Matthias's cast) closer to Lasse's cast . The haul ends up at RSP, the timing when Lasse releases the line. The red line represents maximum haul speed: Histories 3.JPG Histories 4.JPG The main deceleration comes from the rod again. It must be a question of timing for releas...
by Merlin
Sat Sep 05, 2020 6:17 pm
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Hi Paul Peak haul speed takes place some 20 ms before the tip deviates from its "SLP". Pretty close indeed since the exact position is not so easy to define, the path pictured by the model being slightly domed :) I can change haul timing, etc. in the model. I use a rotation/translation input inspire...
by Merlin
Sat Sep 05, 2020 3:52 pm
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Here is an abstract of a simulation based on an analysis of one of Paul’s competition casts. The first graphic illustrates the various important timings. Line and rod tip peak velocities occur a few ms before RSP but for sake of simplicity I use RSP as the reference for this point in time. A haul is...
by Merlin
Sat Sep 05, 2020 7:30 am
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Gary

I shall make an illustration with all references (MCL, RSP, MCF, haul timing, etc.) of what is happening on the speed/acceleration histories during a hauled cast. That will make things clearer I think (and I hope).

Merlin
by Merlin
Sat Sep 05, 2020 7:28 am
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Hi Dirk There are two real world experiences behind, starting with Paul's There must be an immediate loss of tension at RSP because if you haul through RSP with a softer cast and less aggressive haul you can clearly feel the tension suddenly disappearing. And the fact that in the first part of Lasse...
by Merlin
Fri Sep 04, 2020 2:14 pm
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Hi Paul There must be an immediate loss of tension at RSP because if you haul through RSP with a softer cast and less aggressive haul you can clearly feel the tension suddenly disappearing. So no line can be shot at this point as far as I can see. Tension reappears later as the loop propagates. At l...
by Merlin
Thu Sep 03, 2020 9:04 am
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

Does the rod tip always pull the fly leg while the tip is slowing to MCF? I would really like to understand how the Tension around the loop evolves from MCL-RSP2. We also have to consider angular momentum The delay observed for the line to be shot in the first part of Lasse’s video suggests that th...
by Merlin
Thu Sep 03, 2020 9:03 am
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

So not what I think, but what actually happens We may be right and wrong at the same time Lasse. I checked the video with the light as the reference this time. In the first case the light is on just after RSP (10 to 15 ms maybe if I can rely on the time scale). In the second case it is just in time...
by Merlin
Wed Sep 02, 2020 7:27 pm
Forum: Flycasting Physics
Topic: Shooted cast
Replies: 74
Views: 2884

Re: Shooted cast

I don’t think that release timing in relation to the haul is as important as release timing in relation to loop formation. Fully agree Paul. Once max haul speed is achieved, dies are cast and nothing will influence line speed. Consequently one can focus on release time for the shoot. In Lasse’s vid...

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