The limit of your bow is 40 lbs of draw weight, and you’re able to pull theīowstring back as far as possible (knowing that your strength capabilitiesĮxceed the limit of the bow draw weight), then you’re found the max: you’re atĤ0 lbs draw weight, and you know what it feels like. Sit down every single time and figure out the mathematical equations, so thereįirst and foremost, you can look at the limitations of your bow.Ī compound bow is going to be easier to pull back than a traditional or takedown recurve bow, so each bow will give you a different feeling of resistance even if they create similar draw weights. Short, calculating your own draw weight is very important. We know your draw weight is important, but now it’s time to figure out what your own draw weight is.Īrchery has a moment before the release where the world slows down, and it’s just you and that bow: you calculate FPS, KE, distance, your draw weight, and rapidly predict the way this individual release will go based on the information that’s literally at your fingertips.
#Feet persecond compound bow full#
They will be defined by the draw weight, which brings us full circle. It’s the energy that allows something to keep moving past the point of its initial push or pull to movement.įor some context, a windmill uses kinetic energy: the initial push from the wind, and the movement that continues from momentum after the wind has settled.įPS and KE work in tandem to calculate the speed and damage, or penetration level and depth, of an arrow. Kinetic energy is power that’s stored in a moving object or body, and it will eventually run out. It’s used to figure out damage on impact, using the arrow’s speed, or FPS, and its weight (measured in grains). However, kinetic energy is used to define something else entirely. You are expected to be within a football field of your target, and most FPS in beginner to moderate bows will be around 150-165 FPS, giving you a rough 1.8-2 second span between release and impact on your target. The feet per second is simply a measure of distance. What Are FPS and KE?įPS stands for feet per second, and KE stands for kinetic energy. The most calculable and important one is draw weight. Point is, there are a ton of factors that go into your total FPS and power, but That means that it’s just about as powerful as a human can muster, and you can expect to see high FPS and KE ratings, which we’ll get into in a moment. You’ll see a lot of hunting bows with a 70 lb maximum draw weight and a 28” or 31” draw length. It matters strictly because it’s a measurement of the bow’s capabilities.
There are so many factors that go into it. You can have a low draw weight around 25-35 lbs, but still have a high draw range of about 30” or so. The draw weight, arrow weight (measured in grains), and draw length will all define the speed of your arrow, but draw weight is the most important. If you have a 30 lb draw weight on your bow, then you can only fire so far. It’s basically the grade of bow you have, and defines how much power you can expect from the output, and at what speed. Draw weight is the measurement of how much pressure (in pounds) is required to pull a bowstring all the way back for arrow release.
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