Walter & Group..................
Troy, Phil and Gordy
Gordy and
Group,
Couple of thoughts on
translation and slide loading
In my opinion we are
understating the importance of the translation portion of the casting stroke. I
was practicing last night (indoors fly-0) working on some spey and therefore
playing with roll casts.
Make a roll cast with
just rotation = pile, large loop
Make a roll cast with a
lazy translation and then rotation = better but doesn’t straighten the
leader
Make a roll cast with
well timed and accelerating translation that BLENDS INTO A LATE ROTATION
= A POWERFUL TIGHT LOOP ROLL CAST (applies to spey
also)
I know some of our best
don’t put a high value on the translation portion I just get a significantly
better cast with both and
I think the roll cast
is an excellent test since there is no backcast preload to twist the
facts.
(I would also encourage
everyone to look at one of the Spey videos in slow motion the long rod magnifies
everything)
Thanks to Joan’s
response I think I am beginning to see the benefit of the slide load, especially
with this last piece of information.
Along the same lines as
above, as the backcast is unrolling energy is directed to rear.
If we allow the line to
continue to shoot through the guides we continue to increase mass behind the rod
tip.
If we start forward
(loading move) at the same time the rod bends… beginning the loading (actually
translation and loading).
As we approach the
power snap beginning we have an ever increasing mass to the rear (probably
approaching a fully unrolled straight fly line and leader, good timing probably
a good thing here!)
Now the rod is fairly
well loaded already … but …add the line shoot stop of the rear momentum combined
with the power snap (rotation) ( this must result in a total load that is much
deeper than the typical load)
My observation at this
point would say …The slide trades some stroke length for deeper total load.
I will be out there
with this on the weekend. (I am no longer allowed to cast in the snow in the
dark with the flood lights, wife thinks the neighbors will call the mental
health folks)
I wonder if slide
loading will work on a spey cast…it should we’ll see!
I would also point out
that Joan started casting in
Hope this makes sense
and helps
Jim
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Jim..... When I tried sliding just as Joan describes it, I, too felt that there was a trade-off as you described. For me, that did not result in increased distance. It may have smoothed out the cast a bit and prevented too rapid a start. .... but increased distance ? ..... no. Even Joan was unsure that this increased her distance. To quote her (p. 107 of her CASTING TECHNIQUES ) "While I haven't been able to prove to myself that this method gives me more distance under low water wading conditions, it gives me as much as the standard method, but feels a thousand times better."
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Phil nailed it – When the rod axis is parallel to SLP (which is not necessarily the ground in all casting planes…), there can be no loading until rotation of the rod begins. Translate to your heart’s content, no rod load. Sorry.
Then, the concept that the max torque is when the lever is normal to the SLP is spot-on.
I honestly CAN’T agree with the notion that very little loading goes on as a result of translation. My video in Alaska 15 years ago didn’t indicate that to me. Now we were NOT trying for maximum distance, I’ll admit that. So we weren’t loading the rod to the reel seat. We only had a JV basketball court to do our studying in. And not a one of us could cast a full flyline then anyways…
No matter how much loading translation contributes, I DO believe that it’s important even if only to allow a smoother transition into rotation. This is probably the reason that Bruce and Noel had some early frustration in getting the robot to carry line – it’s rotational only. I don’t believe it’s possible to cast 100 feet with rotation only, at least not with the typical gear that we use today.
Troy....
Remember, I didn't say that there can be no loading of the rod with translation alone. I pointed out that there is very little rod load with pure translation compared with that achieved with rotation. Is that little bit important ? I think it is.
I also note that it is very difficult to move a fly rod with translatory motion alone.... no change in the angle of the butt section of the rod at all. This means that there is almost always a mixture of translation and rotation from the start. With efficient casting, there can be more translation than rotation as the stroke starts; then the mixture changes as the stroke continues so that as the stroke concludes we have rotation dominating.
Try to move your fly rod with only translation, and have a friend stand at your side. Ask him to tell you if there is the slightest change in the angular position of your butt section. It is NOT easy to do, even when you try ! Better yet, video yourself as you try to do this. I think you may be surprised.
Bottom line: You need both translation and rotation for an efficient cast.
Gordy