Rotation / Translation / my error

Bruce Richards sent us a spread sheet graphically depicting TRANSLATION, ROTATION, A MIXTURE OF THE TWO AND DRIFT WITH TRANSLATION AND WITH ROTATION. I've included these as an XL Spreadsheet attachment. Here is his message:

Good points by both Troy and Walter. Walter has keyed on complex rotations
caused by wrist/elbow/shoulder motions. To me, that is style. If we
concentrate on what the rod actually does things get much simpler, and that
is how we need to define motions, in terms of the rod... Below I've
attached a simple Excel sheet I use to help people understand rotation and
translation... The last tab shows 3 kinds of drift.....
(See attached file: Rotation-Translation.xls)
Bruce

Scientific Anglers/3M
4100 James Savage Rd.
Midland, MI 48642 USA
Tel: 989-496-1113
Fax: 989-496-3374

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I stated that max loading of the rod coincided with max rod tip velocity. I WAS INCORRECT !

Max. rod tip velocity occurs at RSP (Rod Straight Position). MAX ROD LOAD (MAX. ROD BEND) OCCURS ABOUT ONE TENTH OF A SECOND BEFORE THIS AT NEGATIVE ACCELERATION (THE STOP).

Putting it in different words: The greatest bend in the rod is when the rod is loaded the most. This happens at or close to the STOP. Between the STOP and the Rod Straight Position, the rod tip is moving fastest.

At RSP, the loop begins to form. This marks the end of the casting stroke (as many of us look at it.)

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I like Dennis' overall approach, in attempt to speak a language that students can understand. I almost NEVER use the word translation with a student, unless it's a CCI candidate. I say "move the hand from here to here" while demoing.

I could not disagree more with this statement:

If there is rotation during translation it’s not translation !

Why can you not have other things happening to the object while it's moving spacially? Shoot, on an atomic level, the electrons are doing their own thing at the same time the macro-object is translating, right?

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Yes .... the atoms keep twirling and the subatomic particles at a nano level are doing their dance whilst we circle our sun and the whole solar system hurtles through space on to some sort of infinity !!!!!!

Bruce Richards and I both felt the same way. Perhaps Dennis was thinking of a different concept when he typed that.

I, now, interpret his statement to mean that if there is rotation during translation, that it is not PURE TRANSLATION. With that, I'd agree. His prior statements support my contention.

I, also, agree with you and Dennis that the use of the terms, TRANSLATION and ROTATION have no place in teaching early casters. In fact, I don't use them except when coaching MCCI candidates or in discussing casting mechanics with very advanced casters who are interested in the details.

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I'm reminded of a time we had Ogden Nash as a guest. We challenged him to come up with a rhyme for each word we chose. He was incredible at doing that. I came up with the word, INFINITY. His answer: