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The Basic Physics Behind Fishing Rods

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  • The Basic Physics Behind Fishing Rods

    I'm about to take my chemistry final and my brain is fried from all the cramming i've been doing. Anyways, I recently went with Cameron to fish after a cold front passed through. It was very much like bass fishing as we spent much of our time pitching our soft plastics to structure. In this case, our presentation was vertical and very different from what i'm used to. Cameron started out bass fishing before being taken in by salt fishing so he had a little more experience with this type of presentation. In any case, Cameron made a few casts and on his third one, leaned in and set the hook sharply up. It was so fast, that I heard an audible crack from the line slicing through the cold air. After Cameron fought for a while, the fish rolled to the surface and it was a beauty of a red. It was 27 inches and felt to be around 8+ pounds- a perfect tournament fish. We continued to work the structure when I finally felt something tapping my line. I gave a sharp hook set with my rod bending in response. I felt the fishing run and....nothing. The fish had come off. I was obviously frustrated by this. On days when the bite is soft and finicky, you probably won't get too many opportunities to catch fish so you have to take what you can get. This got me thinking though. I asked myself, "why did I miss that fish?" Bad luck aside, I was looking for a reason. Cameron made a comment about me switching over to a rod with more backbone. The light bulb went on in my head and luckily I brought one.

    What is a rod with more "backbone?" From my understanding, a rod with more backbone does not bend as much. Also, it could be the rod is stronger towards the reel. Usually, it can be denoted by the action of rod with light being a very limber rod and heavy to being a stout rod. So why does this matter? It is all about physics. Yes, I want to make you think on this fine day. If you take out all the variables and just leave it to the basic physics of fishing, it should make sense. Instead of a rod, you have a wooden plank with string attached to it and a 3 pound rock is attached to the string. If you lift the wooden plank 2 inches, the rock in turn will rise two inches. Now switch back to your rod with line and a 3 pound rock attached. If you do the same thing with a light rod, the rock will only rise probably only an inch or less. Why? It is because of the bend in the rod. If you use a heavier action rod, the rock may rise an inch and a half. In effect, your rod is dissipating the energy that you create. This is a good thing though! If you were to have no bend in the rod, the energy would not be dissipated and there is only two ways for the energy to go. Either it travels down the line and to the fish popping the fish off from such a violent hook set, or to you which could cause strain in your arms.

    To test this out, I switched over to my other rod and within a few casts, I had a hit. I gave it a sharp hook set and pulled up a catfish. Well, I can't have it all can I? Each rod has it's own situation to be used. If you are doing pitching like in my situation, a stouter rod is in order. I was just hoping people can appreciate what goes on when you catch your trophy fish.
    Resident Ninja

  • #2
    Nice write up Jhua ! Thanks
    I dont always drink beer, but when i do , I prefer to be fishing !!!!!

    Comment


    • #3
      Nice post. I have many different action rods, but generally use a light to medium light action rod. I have some buddies that use worm rods (heavy action) and they do well. Line stretch is another consideration.

      Thanks Jhua!
      "Hey Hillary, regarding the Benghazi Attack on 9/11-we'll just blame it on that movie, not my total lack of security. By the way, what's so significant about 9/11 anyway-was that a date my buddy Bill Ayers of the Weather Underground blew up a government building?" asked Obama to Hillary. BEAUTIFY AMERICA, RUN OVER A LIBERAL, THEN BACK UP AND SEE IF HE'S DEAD.

      Comment


      • #4
        Great Post Jhua!!!!!
        Bryan Evans

        Boat Werx of Texas
        (AKA Evans Marine Services)
        4340 19th St.
        Bacliff, Texas 77518
        http://evansmarine.net
        http://boatwerxtx.com
        main@boatwerxtx.com
        281-559-BOAT (2628)

        Comment


        • #5
          jhua, you are making my head hurt!! seriously tho, good mental picture.

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          • #6
            I dont always read long posts but yours was really good.Chester More flounder guru and writer for tx fish n game uses a stout rod for flounder fishing I went to one of his seminars and he said rod choice is key to success.I have a waterloo worm rod new cond for trade its very stout.good post J

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            • #7
              Rods are a major component of fishing. Here is another consideration. Tie that rock to 30 yards of braded line and then to mono. Put a cheap reel and an expensive reel (with a good drag) on that plank. It is a combination of mechanical equipment and materials used that produce desired effects. Add the skill and experience of the angler. Add them all together to perfection and catch a freaking hardhead. Great post Johnathan!
              Captain, Galveston County Blue Team Fish Killers
              "Fishing Guide"-A person who contributes to the delinquency of a liar.

              Comment


              • #8
                Originally posted by Paul Marx
                Okay guys now try this . Have a friend stand out at the end of your cast and pick up lets say your tout . Have him hold it between his finger to where he won't get hooked . Now tighten your line and set the hook . Let me know how much pull he feels . Profesional bass anglers using mono have been recorded as having 4.5 lbs of pull max. Change places with said friend and see for yourself . Twenty years ago at the end of a 120' cast using 20 lb. mono a fish would have to move the lure 30" before the angler felt it on his rod.
                Wow that's a lot of pull, good to know.
                Bryan Evans

                Boat Werx of Texas
                (AKA Evans Marine Services)
                4340 19th St.
                Bacliff, Texas 77518
                http://evansmarine.net
                http://boatwerxtx.com
                main@boatwerxtx.com
                281-559-BOAT (2628)

                Comment


                • #9
                  Originally posted by Paul Marx
                  Okay guys now try this . Have a friend stand out at the end of your cast and pick up lets say your tout . Have him hold it between his finger to where he won't get hooked . Now tighten your line and set the hook . Let me know how much pull he feels . Profesional bass anglers using mono have been recorded as having 4.5 lbs of pull max. Change places with said friend and see for yourself . Twenty years ago at the end of a 120' cast using 20 lb. mono a fish would have to move the lure 30" before the angler felt it on his rod.
                  This very true...

                  Comment


                  • #10
                    and i just noticed that the Shell station next to the Pancake House in Hearne, Tx had regular unleaded gas 5 cents cheaper than the Exxon station right across the street.

                    Comment


                    • #11
                      There's a ton of physics in fishing poles, reels, lines, lures, and so forth. The rod builders have to know all kinds of ratings, actions, responses, and stuff like that. Fishing line is designed at near-critical diameters now such as by using some modern physics and engineering - braid is a leading example. The new carbon-ceramic drags are really something. When you fish a "12 pound test rig" there is a lot of math in it. You can catch a 50 pound tarpon on 12 pound test if you have the right gear and method. A fish rarely exerts a weight like out of the water, such as a lifting weights, but rather you have to design for the shock of the strike. This burst of pressure creates a shock wave that is transferred from the fish to the hook to the leader to the pole and then the reel. The weakest point can burst and that is where the energy is released. BOOM! If you've ever broken a bone, you know exactly where the energy was released.

                      The purpose of a fishing pole is to act like a shock absorber then, along with your drags. If the strike force is too much and your rod isn't a very good one, it can break very easily - although as most rod makers know, most of that happens from abuse that weakens it first (stepping on it, crunching it in the pickup truck, slamming the pole tip against something).

                      Other than that, there are as many styles of fishing as there are fishermen, and everyone has a preference for what works based on personal experience rather than math. That gets into a feeling for the "touch" and what you like, and what you're targeting. Tight lines and have fun!

                      Comment


                      • #12
                        Great thread guys!
                        I've been using extremely light, fast action rods with braid for the feel. I really like them so far, but I've also been thinking alot more about medium action rods for reds & flounder. I've got a couple of nice medium to medium light action rods I'm going to take out on my next wade and see how they compare.
                        "Curmudgeon only pawn in game of life."


                        Comment


                        • #13
                          Originally posted by JT View Post
                          and i just noticed that the Shell station next to the Pancake House in Hearne, Tx had regular unleaded gas 5 cents cheaper than the Exxon station right across the street.
                          Hey JT-did ya stop and get some of the bread pudding pancakes or try the pumpkin flavored ones at the pancake house?

                          BTW, what was the main buffet item at the China Buffet on Brown street today?
                          "Hey Hillary, regarding the Benghazi Attack on 9/11-we'll just blame it on that movie, not my total lack of security. By the way, what's so significant about 9/11 anyway-was that a date my buddy Bill Ayers of the Weather Underground blew up a government building?" asked Obama to Hillary. BEAUTIFY AMERICA, RUN OVER A LIBERAL, THEN BACK UP AND SEE IF HE'S DEAD.

                          Comment


                          • #14
                            ....or you just need to use sharper hooks

                            Comment


                            • #15
                              There's a station that sells shells?

                              Whaddya do, buy like "three clams" or somfin?

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