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Search found 62 matches

by hshl
Wed Oct 30, 2019 10:48 am
Forum: Flycasting Physics
Topic: Counterflex, energy loss and absorbation
Replies: 11
Views: 2722

Re: Counterflex, energy loss and absorbation

Thanks a lot.
by hshl
Tue Oct 29, 2019 12:50 pm
Forum: Flycasting Physics
Topic: Counterflex, energy loss and absorbation
Replies: 11
Views: 2722

Re: Counterflex, energy loss and absorbation

Thanks for your answer, Daniel. If you use a stiff grip, your body acts as an embedment and throws back the energy into the rod (vibrations). A loose grip allows the flexural waves in the rod to travel through your hand and be absorbed by the body which acts as a big damper. In the first case you de...
by hshl
Sat Oct 26, 2019 7:39 am
Forum: Flycasting Physics
Topic: Counterflex, energy loss and absorbation
Replies: 11
Views: 2722

Counterflex, energy loss and absorbation

Hi Daniel and all , I‘m thinking about energy loss and the role the counterflex (CF) plays in this context. Starting from Daniels paper „Physics of the overhead cast“ on page 34 the energy loss is highlighted. For a „fair“ fly cast 25 % remains in the rod. 80 % of this amount stays in the tip 25 % *...
by hshl
Sat Oct 19, 2019 2:16 pm
Forum: Flycasting
Topic: Casting extremely soft rods - what changes?
Replies: 20
Views: 2809

Re: Casting extremely soft rods - what changes?

carlz wrote:
Sat Oct 19, 2019 12:22 pm
I found that my casting improved dramatically as I started changing between softer and stiffer rods for training.
This matches my own experience :D .See Pages 13 & 14
Cheers
by hshl
Sat Apr 20, 2019 1:29 pm
Forum: Flycasting
Topic: who is the inventor of the snake roll and the snap T cast?
Replies: 10
Views: 1096

who is the inventor of the snake roll and the snap T cast?

Lasse wrote: Who besides Günther credits him for inventing the snap t?

As far as I know only GF himself...
by hshl
Wed Jan 30, 2019 11:31 am
Forum: Flycasting Physics
Topic: Swing, Spring, Whip
Replies: 42
Views: 7437

Swing, Spring, Whip

From you diagram, I assumed that when you did the calculation for the MOI of tip and the butt sections you used a common rotation center that was fixed at the wrist rather than the different rotation centers you get for the different sections of a flexible rod. By calculating the MOI in annex 2 I j...
by hshl
Tue Jan 29, 2019 8:45 am
Forum: Flycasting Physics
Topic: Swing, Spring, Whip
Replies: 42
Views: 7437

Swing, Spring, Whip

You’re welcome Greame, since for the sake of simplicity that figure XIII is focusing on the rotary motion I added section F2 and figure XIV. I just noticed that annex 3 includes a quite good visualization about the whip effect how Franz- Josef is describing it. Simply spoken the whip effect is visua...
by hshl
Mon Jan 28, 2019 6:45 pm
Forum: Flycasting Physics
Topic: Swing, Spring, Whip
Replies: 42
Views: 7437

Swing, Spring, Whip

Gordy, in annex 2 of my investigations (page 51) I calculated the moment of inertia exactly the way you wrote. Didn't you read the chart ? It seems you still try to explain a complex issue with simple equations applicable to rigid bodies ?! Because of the translation effect on the velocity center of...
by hshl
Mon Jan 28, 2019 3:05 pm
Forum: Flycasting Physics
Topic: Swing, Spring, Whip
Replies: 42
Views: 7437

Swing, Spring, Whip

Hi Graeme, I've always tried to teach my students that they need to be moving the whole rod - also known as translation - in addition to the rotational phase of a cast. That avoids a "windscreen wiper action". How does such instruction fit with Figure XIII? Good point and you pointed out an assumpti...
by hshl
Mon Jan 28, 2019 1:33 pm
Forum: Flycasting Physics
Topic: Swing, Spring, Whip
Replies: 42
Views: 7437

Swing, Spring, Whip

Hi Vince, Your paper doesn’t define the whip effect in a manner I can follow, is it explained in Tobias paper ? Franz- Josef and I tried to clarify the "inertial" as well as the "whip effect" in section F1 of my paper, especially by drawing the figure XIII (see attachment). We think this figure cont...

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