Welcome Dr William McGlinn

[Paul Arden]

You've lost me here Walter, the fly leg moves but there is no rod leg.

[Walter]

Paul,

Get some sleep. There are no train tracks.

[gordonjudd]

The tracks make the train analogy valid only for a fixed pulley, the loop is not.

Lasse,
I was not talking about what happens after the loop is formed, but the time the tip speed along its path is increasing. That why there was a caveat that "If the train increases its speed along the track"

At that point there is no loop and thus no fixed pulley analogy. I was just trying to point out that as long as there is no slack in the line, then the speed of the fly will increase while the tip speed is increasing even though the path the tip is following and the path the fly is following may be in different directions.

Can you come up with a slack free example (i.e. there is a varying tension along the length of the line) where that would not be true?

Gordy

[Paul Arden]

I think Gordy's posted image shows it pretty clearly the the line curves away following the rod tip Walter. There is no rod leg - at least not until RSP - and the fly end must be moving. Is this skin drag at play?

Cheers, Paul

[VGB]

I think Gordy's posted image shows it pretty clearly the the line curves away following the rod tip Walter. There is no rod leg - at least not until RSP - and the fly end must be moving. Is this skin drag at play?

Cheers, Paul

Paul

Lay out a flexible distributed mass in the same way that Gordy static picture is and pull on the rod tip end until the fly end moves. Please tell me what shape the line is laid out in even the fly end begins to move and in what direction the fly begins to move in.

Regards

Vince

[VGB]

Can you come up with a slack free example (i.e. there is a varying tension along the length of the line) where that would not be true?

Gordy

That is an unusual definition of slack Gordy, where did it come from?

Vince

[Walter]

I think Gordy's posted image shows it pretty clearly the the line curves away following the rod tip Walter. There is no rod leg - at least not until RSP - and the fly end must be moving. Is this skin drag at play?

Cheers, Paul

Paul,

I'm not sure what image you are referring to but as Vince has suggested try laying 40 feet of line out on a flat surface (one with minimal drag) and try pulling one end at right angles to the lay out. Let me know if the other end begins to move immediately.

[Paul Arden]

Yep it doesn't look like a loop forming. Skin drag?

[Walter]

Did the fly end move? How far did you have to move the rod end before the fly end started to move?

[Lasse Karlsson]

The tracks make the train analogy valid only for a fixed pulley, the loop is not.

Can you come up with a slack free example (i.e. there is a varying tension along the length of the line) where that would not be true?

Gordy

A flycast?

Cheers
Lasse