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Search found 556 matches

by Dirk le Roux
Thu Sep 01, 2022 6:56 pm
Forum: Flycasting Physics
Topic: Constant Acceleration
Replies: 111
Views: 8277

Re: Constant Acceleration

Hi Paul "Constant acceleration" can only be constant in one of two ways - The acceleration remains constantly the same magnitude and its time plot (with time on the horizontal axis) is a straight horizontal. The resulting velocity plot is a straight slope The acceleration increases/decreas...
by Dirk le Roux
Tue Aug 30, 2022 2:52 pm
Forum: Flycasting Physics
Topic: Waypoints
Replies: 9
Views: 1794

Re: Waypoints

Hi Paul I am tempted to say it's your best work yet! I think I understand both your Aerial Single Spey permutations. In some scenarios, more snappy waypoints are just the ticket for more precise outcomes. And those do seem to provide more resistance/stability. In other cases, such as the steeple cas...
by Dirk le Roux
Tue Aug 30, 2022 12:58 pm
Forum: Flycasting Physics
Topic: Waypoints
Replies: 9
Views: 1794

Re: Waypoints

Hi Gary That's a great example! Humps, snaps, pre-stroke mends, waves in a dry fly pick-up, what else? To me, they become waypoints when I employ them to achieve two things - 1) For the line on the fly side of the waypoint bend to first head there (as with your popper), and 2) for the line on the lo...
by Dirk le Roux
Tue Aug 30, 2022 9:04 am
Forum: Flycasting Physics
Topic: Waypoints
Replies: 9
Views: 1794

Re: Waypoints

Hi Paul Back when I first used the term , I defined it as "A bend in the line, purposely placed before or during a stroke to influence the line's flight path to benefit the cast". I would nowadays add that a waypoint’s timing precedes a stroke acceleration. Playing with Torsten's reference...
by Dirk le Roux
Fri Aug 26, 2022 8:18 am
Forum: Casting Sport
Topic: WC2022
Replies: 66
Views: 13064

Re: WC2022

Thanks for the video, Lasse. Hoping to see some more as time goes by. Henry is the one on the left, in the shorts?

Still so chuffed, John!
by Dirk le Roux
Thu Aug 25, 2022 9:47 am
Forum: Casting Sport
Topic: WC2022
Replies: 66
Views: 13064

Re: WC2022

Real chuffed for John!

Does anyone have footage of the men's trout distance finals? I am particularly interested to see Henry Mittel's (USA) technique.

All the best,
Dirk
by Dirk le Roux
Wed Jul 06, 2022 4:46 pm
Forum: Flycasting Physics
Topic: Causes of tailing loops
Replies: 220
Views: 19185

Re: Causes of tailing loops

Hi Vince I don't know how Tracker calculates velocities. I do know you need at least three points to get a single reading. The values I showed on those plots are velocity magnitude, as I haven't found a way to set the reference axes such that Tracker views movement to the left along the X-axis as po...
by Dirk le Roux
Wed Jul 06, 2022 1:12 pm
Forum: Flycasting Physics
Topic: Causes of tailing loops
Replies: 220
Views: 19185

Re: Causes of tailing loops

...The fly line acceleration at the end of the cast has been forecast by models and measured on here as well and occurs when the tip of the line is going into the loop. I don't have the footage, either Graeme or Dirk did the analysis with Tracker. Although the tip of the fly ine does turn over fast...
by Dirk le Roux
Thu Apr 28, 2022 5:38 pm
Forum: Flycasting Physics
Topic: What is ultimate fly line weight for your fly rod? Or what is the ultimate fly rod for your line? The goal is distance.
Replies: 421
Views: 32872

Re: What is ultimate fly line weight for your fly rod? Or what is the ultimate fly rod for your line? The goal is distan

a nominal MOI value for 30 g of line Hi Gordy That line weight is equivalent to 30 ft of about a AFFTA 13 weight. I wonder what is the gram weight of a MED at say 80 ft of carry. Its first 30 ft is 9.1g. Trident's Spreadsheet has some measured MOI values of various rods, for what it's worth. At 57g...
by Dirk le Roux
Thu Apr 28, 2022 5:04 am
Forum: Flycasting
Topic: Echo MPR double haul kit
Replies: 27
Views: 6152

Re: Echo MPR double haul kit

Thank you Nick. I'll keep practicing :upside:

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