Acceleration, more / Drift

Hi to All in the Masters Study Group,
Happy Thanks giving to one and all in the U.S.A. we don't have thanks giving over here," we ain't got nuttin to be thankfull for" but still we are alive (just about) see you all at conclave 2008

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If I may, I would like to add one other term to this discussion. The term is Jerk (the 3rd derivative of position, ft/s3), which is the time rate of change of acceleration. Low Jerk values would be more commonly known as smooth acceleration.

"# With rotatory motion there necessarily must always be acceleration, since a rotating object is constantly changing direction.

One example is an airplane propeller. It may be rotating at a constant number of revolutions per second, yet it is always accelerating."

I’m really not sure what you are saying here("must always be acceleration"). Unless you are talking about something like Coriolis acceleration or centripetal acceleration, angular velocity can be constant (angular acceleration = 0).

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Thanks ! Now I can add the word, "jerk" to my lexicon. I didn't know that use for the term. (Rate of change of acceleration).

As to the rotatory motion resulting in acceleration, I'll defer to a new article on that and related casting physics which will appear in a new edition of the Loop, written by Walter Simberski. It was he who taught me that concept.

(Not the, "Coriolis effect", which is the apparent deflection of a body in motion produced by the Earth's rotation . )

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The term Accelerating was used as the motion. This is a word problem. I have to agree if you are not going faster you are not accelerating. If you maintain forward motion it is just that motion. Can you now move with less speed and not be slowing down?

Accelerating is time X distance with both increasing or changing.

Hey Gordy,

I have a question for you Master's...

I was teaching a student on distance casting and introduce him to including a drift on the back cast to lengthen the stroke as more line is carried (or should I say "Shot") on the back cast. As he tried this technique, he began to understand it purpose in increasing the available stroke length and staying connected to the fly line (enlighten me on this concept...it never made sense to me like increasing the stroke length did.).

A question came to mind while observing his cast...

When drifting...?

1. Explain to me what happens from rod deceleration to the actual drifting of the rod in the same direction of the unrolling line.

2. Do you find that the drift is more useful when line is actually "shot" on the back cast? Requiring the need for a longer stroke length...

Thanks,

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As I see it and you note, one of the principle accomplishments of DRIFT is the repositioning of the fly rod tip way back as a set up for increase in available stroke length and rod arc for the following forward cast.

The same thing results from, LAYBACK (Gary Borger / Jason Borger) as well as Lefty Kreh and Ed Jaworoski's technique of bringing the back cast all the way back in the first place.

With a back drift, as the rod tip is moved back in the direction of the unrolling loop, one also delays the turnover of the loop which, especially when shooting line back, can result in a longer back cast and the carrying of more line than the caster can carry out of the rod tip when false casting without drift. This is one way of being able to handle more overhang that that same caster can manage without it.

It, also, can provide some, "HANG TIME" which can be used to adjust the angles of the hand, wrist and arm as additional preperation for the delivery cast. When actually fishing, I'll occasionally use this to make an adjustment in direction when making the next forward cast to a moving bonefish, etc.

I get the impression, too, that some champion distance casters use this time to judge their back cast loop as ideal or not for the delivery cast. (One trick in distance casting is to make back loops until you get an absolutely perfect one before making the forward cast ..... pick the best one and go with it !)

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