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Walter & Group...
[GH] Lots of answers ! Can't possibly share them all. I picked a few to send. Mark Surtees should be back soon to help with critiques.
Gordy
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From Mark Milkovich:
Gordy,
Interesting quiz; here’s a set of answers to play with.
Mark
1. I am going to make two Casting Strokes. If I apply a force to the rod over a Casting Angle of 45 degrees in the first and I apply force of the same magnitude to the rod but continue through a Casting Angle of 60 degrees in the second. Will the second Casting Stroke generate a maximum tip speed which is :-
a. Faster than the first? b. Slower than the first? c. The same as the first?
Can you explain why? All else equal, because a constant force is applied longer, 150 longer, and that constant force will continue to accelerate the rod.
2. Will the second Casting Stroke have a duration which is :-
a. Longer than the first? b. Shorter than the first? c. The same as the first?
They are moving at the same speed but the second travels further.
For questions 1 and 2, the second cast is simply an extended version of the first, extended length and extended acceleration.
3. If I apply a force to the rod over a Casting Angle of 45 degrees in the first Casting Stroke and I apply the same force to the rod over the same Casting Angle but add 3’ of co-occurring Casting Stroke Length in the second Casting Stroke. Will the second Casting Stroke generate a maximum tip speed which is:
a. Faster than the first? b. Slower than the first? c. The same as the first?
Can you explain why? The constant force is applied longer, the longer it is applied the faster the rod travels and the tip speed would be faster even if the “rotation speed” were identical because butt speed would be added to tip speed.
4. Will the second Casting Stroke have a duration which is:
a. Longer than the first? b. Shorter than the first? c. The same as the first?
Because you are adding 3’ of casting stroke, which consumes time, to otherwise identical casts.
5. How does the Hand Path of the caster affect the path of the rod tip?
All else (load, force) equal and constant, the tip path will mirror the hand path. In a normal cast however the load and force would vary between the two RSPs. The tip path especially at the beginning and end of the stroke would not mirror hand path well at all.
6. How does the Casting Angle affect the path of the rod tip?
The greater the casting angle the greater the elevation difference between the tip at RSP and at its apex for a vertical cast.
7. What is the relationship between force and bend?
Generally more force produces more bend but the more direct relationship is between tip speed and bend thus equal force would produce dramatically different bends when comparing translation (less bend) to rotation (more bend).
8. How does the bend affect the tip path of the rod?
For any particular point along a vertical cast’s tip path, additional bend lowers the tip.
9. How does force have an effect on the tip path of the rod?
By working in opposition to the weight of the line.
10. How could a curvilinear hand path help produce a linear tip path during a Casting Stroke?
By using a concave (cupped) hand path.
11. Using your answers above, if we want a Straight Line Path of the rod tip during our Casting Stroke how many variables can we use to try to achieve it?
a. One.? b. Two.? c. More than this?
Please explain your answer.
You can modify tip path by manipulating any of the following:
· Duration/length of the Casting Stroke
· Force applied
· Size of the casting angle
· Mix of rotation and translation
· Shape of the hand path
12. Using your answers above, if we want a particular tip speed at the end of our Casting Stroke how many options do we have available to achieve it ?
a. One.? b. Two.? c. More than this?
Please explain your answer.
Any of the variables could be used to vary tip speed.
Mark
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From Lyth Hartz:
Hi Gordy,
Here are my answers to the quiz from Mark Surtees. Great questions. I have read the follow up e-mails but am still struggling with Curvilinear translation. I tried to look at the link but that was way over my head. So, here’s my best shot at the answers to the quiz. My answers are in red.
1. I am going to make two Casting Strokes. If I apply a force to the rod over a Casting Angle of 45 degrees in the first and I apply force of the same magnitude to the rod but continue through a Casting Angle of 60 degrees in the second.
Will the second Casting Stroke generate a maximum tip speed which is :-
a. Faster than the first? b. Slower than the first? c. The same as the first? Answer: A. Faster than the first.
Can you explain why? The extra arc angle will add speed to the rod tip. It’s like the blades of a windmill, the tip end of the blade is traveling faster than the center of the blade near the axis. So, adding extra degrees of angle will increase the speed of travel by the rod tip.
2. Will the second Casting Stroke have a duration which is :-
a. Longer than the first? b. Shorter than the first? c. The same as the first? Answer: A. Longer than the first.
3. If I apply a force to the rod over a Casting Angle of 45 degrees in the first Casting Stroke and I apply the same force to the rod over the same Casting Angle but add 3’ of co-occurring Casting Stroke Length in the second Casting Stroke.
Will the second Casting Stroke generate a maximum tip speed which is :-
a. Faster than the first? b. Slower than the first? c. The same as the first? Answer: A. Faster than the first.
Can you explain why ? The same force applied with a longer the stroke creates greater tip speed.
4. Will the second Casting Stroke have a duration which is :-
b. Longer than the first? b. Shorter than the first? c. The same as the first? Answer: Longer than the first.
5. How does the Hand Path of the caster affect the path of the rod tip ? Answer: Hand path straight, rod tip straight, hand path humped rod tip humped. Hand path dipped, tailing loop.
6. How does the Casting Angle affect the path of the rod tip? Answer: The casting angle when adjusted properly (lesser angle for short line and greater angle for long line will maintain a straight line path of the rod tip.
7. What is the relationship between force and bend ? Answer: Less force, less bend, more force more bend.
8. How does the bend affect the tip path of the rod ? Answer: The bend in the rod is what allows us to get the straight line path of the rod tip when the rod moves with an arc or angle. More bend requires more arc to maintain a straight line path of the rod tip, less bend requires less arc to maintain a straight line path of the rod tip.
9. How does force have an effect on the tip path of the rod ? Answer: The amount of force also changes the bend of the rod which then requires an adjustment in the arc to maintain a straight line path of the rod tip. More force equal more bend which requires more arc for a straight line path. Less force equals less bend which requires less arc for the straight line path of the rod tip.
10. How could a curvilinear hand path help produce a linear tip path during a Casting Stroke ? Answer: I don’t know what a curvilinear hand path means. This is a new term for me and I will need to research it more.
11. Using your answers above, if we want a Straight Line Path of the rod tip during our Casting Stroke how many variables can we use to try to achieve it ?
a. One.? b. Two.? c. More than this ? Answer: C. More than this.
Please explain your answer. Answer: Stroke length, degree of arc and force or power applied.
12. Using your answers above, if we want a particular tip speed at the end of our Casting Stroke how many options do we have available to achieve it ?
b. One.? b. Two.? c. More than this ? Answer: C. More than this.
Please explain your answer. Answer: Again, the tip speed is a function of the variables of stroke length, degree of arc and force or power applied.
Lyth Hartz
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>From Alan Kato:
Hi Gordy,
I will weigh in on Mark’s test.
Similar to an FFF test, I tried to keep my answers short and hopefully sweet.
1. I am going to make two Casting Strokes. If I apply a force to the rod over a Casting Angle of 45 degrees in the first and I apply force of the same magnitude to the rod but continue through a Casting Angle of 60 degrees in the second.
Will the second Casting Stroke generate a maximum tip speed which is :-
a. Faster than the first? b. Slower than the first? c. The same as the first?
Can you explain why? The rod tip accelerates to a greater speed with a constant force that is applied for a longer duration. I think of the analogy of varying the duration of a thruster burn on a space ship.
2. Will the second Casting Stroke have a duration which is:
a. Longer than the first? Yes b. Shorter than the first? c. The same as the first?
See above.
3. If I apply a force to the rod over a Casting Angle of 45 degrees in the first Casting Stroke and I apply the same force to the rod over the same Casting Angle but add 3’ of co-occurring Casting Stroke Length in the second Casting Stroke.
Will the second Casting Stroke generate a maximum tip speed which is:-
a. Faster than the first? Yes b. Slower than the first? c. The same as the first?
Can you explain why? The tip speed is a result of the rotation and translation. This assumes that the rotational force is the same and the translation adds force and therefore tip speed to the cast.
4. Will the second Casting Stroke have a duration which is:
b. Longer than the first? Yes b. Shorter than the first? c. The same as the first?
5. How does the Hand Path of the caster affect the path of the rod tip? The hand path affects the straightness of the tip path. It can increase/decrease a convex or a concave tip path.
6. How does the Casting Angle affect the path of the rod tip? The casting angle influences the tip path curvature. A wider casting angle creates a longer curve of the tip path.
7. What is the relationship between force and bend? Greater force = greater rod bend.
8. How does the bend affect the tip path of the rod? Depending on the particular casting angle, greater rod bend creates a less convex or more concave tip path.
9. How does force have an effect on the tip path of the rod? Greater force creates a tip path that is less convex, or more concave.
10. How could a curvilinear hand path help produce a linear tip path during a Casting Stroke? A curvilinear hand path can add or diminish convex or concave motion to the tip path.
11. Using your answers above, if we want a Straight Line Path of the rod tip during our Casting Stroke how many variables can we use to try to achieve it ?
a. One.? b. Two.? c. More than this ?
Please explain your answer.
I think these are interdependent variables in achieving a SLP.
Casting angle
Force application
Casting stroke length
Hand path
Length and timing of the haul
12. Using your answers above, if we want a particular tip speed at the end of our Casting Stroke how many options do we have available to achieve it ?
b. One.? b. Two.? c. More than this ?
Please explain your answer.
I think these are interdependent variables in achieving a particular tip speed.
Casting angle
Force application
Casting stroke length
Length and timing of the haul
Timing in the rod rotation i.e. delayed rotation.
Many Thanks,
Alan D. Kato
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