Walter & Group:
Here's a real brain teaser from MCI Jim Valle. Before trying to answer his questions, give it lots of thought....might even try to draw it out on paper. Remember....he's talking about casting stroke as defined as the path taken by the hand with no casting arc (which we'll consider as the change in angle of the butt section of the rod from the beginning to the conclusion of the cast.)
Gordy
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Hi Gordy and
Group,
I would like to pursue
Laurence’s question a little deeper because it gets to the true understanding of
the path of the rod tip and related casting stroke.
This is a good MCI line
of questioning. (Headache medication is allowed… in
moderation!!)
Your (mathematical or
engineering type) student proposes the following thought process and
question.
Assume a 9’ rod held in
the hand at 3’ above the ground.(no line extended)
Move the rod straight
forward with no arc and we have 2 imaginary parallel lines (no rod load, hand or
stroke length at 3’ and rod tip at 12’ (9+3))
Now string the rod and
allow enough past the tip to load the rod to some extent let’s assume a total
deflection of 6”.
Now move the loaded rod forward the rod tip has deflected 6” and thus the tip now travels at an effective length of 8’6” above the hand in a SLP. (Jim....we must emphasize, here, that the tip travels AT a height of 8'6" above the hand in a SLP......not a trip travel distance.)
When the stroke stops
and the rod unloads the rod must pass through the physical 9’ length at
RSP.
How can you maintain a
SLP of the rod tip?
(Concise answers
required! No more than 3 sentences per question!)