The more energy used to catapult the arrow, the easier it is to bend. The heavier the arrow point that you use, the easier it is to bend. The shorter the shaft, the more difficult it is to bend. Some of the most important factors include: There are literally hundreds of factors that could be involved when we try to explain how the arrow is going to react when it is being shot from a bow. Multiply the number of inches the shaft bends to a thousand, and you will get the arrow spine rating.įor instance, the spine rating of the arrow that bends 0.5 inches is 500.ĭynamic spine is not that simple to measure. The meters then tell us how many inches the arrow deflects. (or 880 gram) Weight is hanged at the center of the arrow. Measuring the static spine is simple, you can use spine meters, as you can see from the image below.Ī 1.94 lbs. Whereas the counterpart is not that simple, the dynamic spine attempts to explain how the shaft of the arrow bend as it leaves a bow. Static spine is simple it measures how stiff the arrow is. There are two types of arrow spine: the static and dynamic spine. The bending of the arrow (archer’s paradox) is what helps the arrow to pass the bow and fly toward the target cleanly. Instead of passing the bow in a clean and undisturbed arrow flight, the arrow should hit the grip of your bow and fly off either to the right or to the left. If the arrow is too stiff, the arrow would be pushed back by the bow into the initial nocking position where the arrow pointing off to one side of the target, and fly off at that direction.įurthermore, the arrow should be able to pass the bow. Upon drawing, the arrow is now aimed at the target and when released the arrow will fly toward the target.Ĭommon sense would tell that it would be impossible for the arrow to hit the target.Īs the string is released, it will return to brace height. When you look at any archer shooting his/her bow, you will notice that upon nocking, he/she has to aim his/her arrow off at a brace height to make the arrows fitted to a string. The arrow flexes as it the string pushes it, then it straightens out again once it leaves the bow and flies toward the target, this is archer’s paradox.Īrcher’s paradox is the reason why your arrow can hit straight to the target. Take a look at any slow-motion video of an arrow being shot from a bow you will notice that the arrow leaves and the bow and flies toward the target not in straight trajectory line but in a wave-like trajectory. To understand what is the cause and effect relationship that arrow spine has on the arrow, we need to delve more into archer’s paradox subject. You can have everything perfect - good stance, perfect shooting form, the best bow - but if you don’t pick the right arrow spine that matches your bow, your shoot will likely to suffer. For example, an arrow with spine number 400 is stiffer than a 600 spine arrow. The lower the numbers, the thicker the arrow while the higher the number, the easier the shaft to bend. It measures how much an arrow will bend or flex. Without further ado, let’s begin! What is an Arrow Spine?Īrrow spine in its simplest definition is the measurement of the arrow’s stiffness. Should you go for a higher or lower arrow spine?.How to determine the correct arrow spine for your set up?.Here are a few things that you will learn: In this post, we’ll learn everything that you need to know about arrow spine. arrow spine singles out as the most critical factor that you should carefully pay close attention to. Out of all the factors that you have to consider when buying an arrow - arrow length, fletching, point weight, etc.
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