I am looking again to some documents about wrist and forearm stiffness and damping capability, at least there are a number of different figures (with a factor 10 sometimes).
Some rules seem to be generally accepted: the higher the rotation velocity the less damping from the joints. The tightness of the grip has an influence but there is little information to derive something from that (how do you measure grip tightness?).
There are stiffness and damping data for wrist, butt little for the elbow.
Some people seem to be particular smart at damping the rebound (this is my experience when looking at people casting during fly fishing fairs).
Merlin
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The Physics of the Overhead Fly Cast by Merlin
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The Physics of the Overhead Fly Cast by Merlin
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Charles Ritz, A Flyfisher's Life
Charles Ritz, A Flyfisher's Life
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Paul Arden
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The Physics of the Overhead Fly Cast by Merlin
On the backcast I don't think it's the wrist Gordy but instead the forearm bouncing against the upper arm. Anyway interesting to see similar readouts with and without rod!!
The Physics of the Overhead Fly Cast by Merlin
Merlin
This would give you a good start on understanding grip and damping:
https://www.sensorprod.com/news/white-p ... 009-08.pdf
There's also been a lot of studies into Hand Arm vibration syndrome that look at energy transmission into the human body
Regards
Vince
This would give you a good start on understanding grip and damping:
https://www.sensorprod.com/news/white-p ... 009-08.pdf
There's also been a lot of studies into Hand Arm vibration syndrome that look at energy transmission into the human body
Regards
Vince
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gordonjudd
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The Physics of the Overhead Fly Cast by Merlin
Merlin,
Do you think that the recovery from MCF is primarily a free-free mode or a fixed-free mode?
Gordy
Do you think that the recovery from MCF is primarily a free-free mode or a fixed-free mode?
Gordy
The Physics of the Overhead Fly Cast by Merlin
Something in between depending on the tightness of the grip I guess, the frequency is nearly the same in both conditions (clamped-free or free-free).
Merlin
Merlin
Fly rods are like women, they won't play if they're maltreated
Charles Ritz, A Flyfisher's Life
Charles Ritz, A Flyfisher's Life
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gordonjudd
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The Physics of the Overhead Fly Cast by Merlin
Merlin,the frequency is nearly the same in both conditions (clamped-free or free-free).
True. For the spring set that he used to simulate the effect of wrist stiffness, Haun calculated that the fixed-free mode would have a natural frequency of 2.70 Hz and a free-free frequency of 2.78 Hz.
However, it would seem to me that the direction of the induced angle change on the wrist as the rod returned from MCF would be positive for the free-free mode while it would near zero or slightly negative for the fixed-free mode.
That is why I think the rebound hump is related to a free-free mode.
Gordy