a waste of good kinetic energy?

[whinging pom]

Going out on the field and practicing casting, im wondering about the gains im making and how i could improve the reward, justify my time better, or give myself more back.
Now being an arty farty creative type I have no idea about science, but Im sure the S'Loops boffins should be able to have a eureka moment or three here in persuit of perfecting this.

Heres what got my thinking; I recently ever so gently lowered a tripod leg into dead flat water to get a photo of the mirror effect. But despite my best efforts at stealth I created ripples which then just kept spreading out across the lake seemingly endlessly , i was gradually freezing waiting while they setlled and it got me thinking about how such a small amount of imput seemed to create so much disturbance, which then got me thinking about kinetic energy and energy transfer.

My question is about turning all that movement from many hours of my seemingly futile attempts to get a few yards more by wafting a fly rod back and forth, into a solution for charging my mobile phone. Surely something could be implanted in the reel seat at the base of that lever, that transfers that power into energy that could be collected via a USB socket at the butt; or the butt could be removed as a remote charging station to sit your phone by?
I'm sure one of you Boffins must be able to come up with something. Sketches are preffered to equations. Maybe paul could produce the winning design as not so much a Hot Torpedo as a Supercharged Torpedo.

Hopefully in future Instead of coming back from the field not so much frustrated at a lack of progress and proclaiming "What a waste of effort!" I'll be impelled down there to charge my phone, and rewarded with a positive result from my efforts and even compelled into spending extra time down there.

Its almost christmas. the weathers awful ....what more excuse do you need?
thanks
Pom

[Torsten]

Search for "human motion energy harvesting", you can find a lot of papers and other stuff.

One example,

[Graeme H]

My question is about turning all that movement from many hours of my seemingly futile attempts to get a few yards more by wafting a fly rod back and forth, into a solution for charging my mobile phone. Surely something could be implanted in the reel seat at the base of that lever, that transfers that power into energy that could be collected via a USB socket at the butt; or the butt could be removed as a remote charging station to sit your phone by?

The problem is that the effort you're putting is not "wasted". It should be "enough to do the job", so that if you're doing more work, that surplus is the wasted kinetic energy component of your efforts.

If you're currently doing "just enough", adding a device to harvest energy requires a little bit of extra effort on your part to produce a surplus for harvesting. There's no free lunches. You'd need to do additional work to produce a surplus, so you're very quickly going to decide to leave that free charging device in the car.

The good news is that if you are already doing too much (producing a surplus) you can find ways to be more efficient to achieve the same goal with less effort. That's something you can get for free now without a special device.

Cheers,
Graeme

[Paul Arden]

The underwater shots surprised me. I had to rethink how fish see out most of the time because it’s rarely mirror flat calm, particularly on moving water.

Cheers, Paul

[Walter]

Some basic differences between fly lines and water waves. Water waves reflect very well. Not so much fly lines. Water waves mostly transmit energy and there isn’t a lot impeding their motion. Fly lines are moving a fly and are subject to the inverse square law of line speed vs air drag.

Putting that aside, one of my favourite ah ha moments came from standing on a casting field with Bruce Richards. He would watch people practically ripping their underwear to make a distance cast and then tell them to make the same cast but with half as much effort. After a few of “the same but with half as much effort” most people would be casting at least 90% of their best distance with less than half of the effort they were originally putting in.

Of course, “half as much effort” is a totally subjective measure, but it I’ve found this be a good practice exercise.

[Torsten]

Waves transmit energy but not matter, unlike the fly line.

--

Not sure if we really need a "surplus" for harvesting, I think it's likely that a lot of work that we invest isn't transferred as Ekin to the line, rather converted into heat by muscles / joints etc.

Here is an interesting paper,
"A Review of Recent Advances in Human-Motion Energy Harvesting Nanogenerators, Self-Powering Smart Sensors and Self-Charging Electronics"
https://www.mdpi.com/1424-8220/24/4/1069

[Paul Arden]

Hi Walter,

That’s a drill I use both for delivery and carry. 100% effort, 90%, 80% and so on. I actually find that in terms of carry as we reduce effort carry increases! This is (I believe) because the loops tighten as a result of less counterflex. The same thing can apply to the delivery too but it’s less obvious because there are other factors.

In real terms if someone has a 75’ carry and that is their maximum, by doing the 100->70 or even 60% effort drill and then increasing again, over time they will learn to increase carry with less effort and then the cycle repeats. That’s one of three carry drills I use.

Cheers, Paul