*All data are approximate. Every inch of draw length above 30 will add 10 feet per second to the IBO value. 600 grain arrows will fly at ~82.5% of initial speed. A properly balanced arrow measurements of 7 to 15%. We sometimes earn a small commission when you click through the affiliate links on our website. World's Fastest Crossbow: TenPoint Nitro 505 ArcheryHunting.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. This calculator is based on average efficiency gains as arrow weight is increased from 5 grains per pound (IBO). You are welcome to share it, as long as you mention www.bestcrossbowsource.com as the original source of the data / research. Copyright 2023 The Everyday Bow Hunter. Bowhunting of any kind is a short range affair and is best kept under 35 Yards. The arrow ballistics calculator below will help you determine your arrow's vertical drop, speed, kinetic energy and momentum, for up to 70 yards out in 10 yard increments. But let's get a bit more precise (pun unintended): Aside from your aiming skills, animals jumping the string is the most common reason for disappointing results on hunting trips with a crossbow. of draw weight. You will find that most modern bows are more than capable of killing most game animals. Given enough time, deer would duck in preparation for a big jump. Chasing 300 fps? For whitetail deer this requirement is lower any crossbow 250 FPS and up will be a safe pick. Calculate arrow fps speed How fast does my arrow travel. Corrected IBO Example - A 70#/29" bow that's rated at 350 fps is has been chronographed at 315 fps with a 400 grain arrow. Arrow speed is determined by your bows IBO speed (fps), your draw weight (in pounds lbs)), your draw length (in inches), the arrows total weight (in grains), and the weight of what is on the bowstring (in grains) as outlined above. If this tool does not calculate, please refresh the page and try again. 1. ), Any additional weight on your bowstring (nock loop, peep, etc.). Arrow Speed, Kinetic Energy, and Momentum Calculator - ArcheryHunting.com Bow Manufacturer IBO Speed (ft/sec) Draw Weight (lbs) Draw Length (inches) Arrow Weight (grains) Weight Added to String (grains) (20gr = peep only, 45gr = peep and tube) Arrow Speed 0 ft/sec 0 mph Arrow Kinetic Energy 0 ft-lbs. Bow And Arrow Speed Calculator | FAST results! - N1 Outdoors The table below provides us with a general idea of how much momentum is needed for different types of wild game and it also shows us the arrows penetration capability when coupled with KE. Four terms to know when properly sighting in a Crossbow. The technical storage or access that is used exclusively for anonymous statistical purposes. Simply put, many of the best crossbows available on the market nowadays (2015) receive their speed ratings based on arrows weighing roughly 400 grain. Knowing how your arrow speed changes with the increase in arrow weight, you can now easily figure out the new kinetic energy: For instance, if you know your crossbow shoots your current 400 grain arrows with a speed of 400 FPS, our chart above tells you to expect 124.8 ft-lb of kinetic energy at 30 yards. By drawing your bow, you convert mechanical energy (ME) and store it as potential energy (PE) in the bow limbs. This is what we included: The IBO speed is used as a standardized speed rating for bows. Archery & Crossbow Ballistics Calculator: Initial velocity: fps m/s Arrow mass: gr g Angle of departure MOA Shaft length: in cm Shaft diameter: in mm Vane length: in cm Vane height . All of these parameters are summarized in an equation that you can use to estimate the actual arrow speed: With this archery calculator, you can also find the momentum and kinetic energy of an arrow. As such we decided to use 400 grain arrows, as this was bound to yield results most closely resembling those that a new crossbow buyer will experience when shooting the arrows in their crossbow package. Decide on the draw weight and the arrow weight. Bows 5-10 years old will tend to gain efficiency faster than one that is brand new. The arrow speed calculator above provides a quick estimation. there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. The rule of thumb was that for every added inch of draw length, you increase raw arrow speed by approximately 10-15 fps. Arrow Ballistics Calculator - Kinetic Energy, Drop, Momentum If you were to shoot a 500 grain arrow from the exact same crossbow, its initial speed would be roughly 90% of 350, or around 315 FPS. Arrow Spine Chart: How to Find Your Arrow Spine - Archery for Beginners The arrow weight in grains (includes fletchings, wraps, inserts and also. And the greater the mass, the longer the energy stays in the arrow as it flies. These are calculated as follows: Our arrow speed calculator converts the units automatically. Power stroke is the distance, in inches, that the string accelerates an arrow down a crossbow's flight rail. A lighter arrow produces more arrow speed, but an increase in arrow weight (incremented by 25 grains) can increase and eventually decrease arrow kinetic energy. FPS calculators (Frame per Second) work by using large databases of FPS records for various processors and graphic cards. If you change the values on your draw weight, draw length, and arrow weight; you will see how these changes impact your arrow speed, kinetic energy, and momentum. To calculate your arrow's kinetic energy you need to know two variables: 1) your total finished arrow weight in grains, and 2) the velocity of your arrow. The factors that impact the overall speed of your arrow are: In addition, it is important to understand that sometimes even minor changes to your draw length, draw weight, and arrow weight can seriously affect the speed, kinetic energy, and momentum of your arrows when they are shot from your bow. Meaning that we can increase the speed by simply using a lighter shaft or broadhead, but that would actually reduce the penetration potential of the arrow because momentum is mostly affected by the weight of the projectile. But it cannot. Arrow drop test results of KE. At the rated 350 fps IBO the speed should be 319 so we know that the IBO is slightly high. Corrected IBO Example - A 70#/29" bow that's rated at 350 fps is has been chronographed at 315 fps with . Bow/Arrow Speed Calculator (Estimate from IBO/ATA) This calculator will estimate the speed of the bow/arrow based on the speed rating of the manufacturer and individual setup of the bow. In the majority of cases once a peep is added the speed will only be a few fps off but the ratings of some bows are significantly off. The crossbow community has been obsessed with velocity ever since the resurgence of the crossbow as a viable weapon for hunting. . Knowing the rough speed at which your arrow will fly, you can now use our kinetic energy calculator to quickly figure out your arrow's initial kinetic energy. The trick is to balance speed (and range finding forgiveness) with arrow mass and penetration potential. Your arrows kinetic energy will depend on its speed. Knowing I shot my 315-grain antelope arrow at 309 FPS, I entered that data to find the most efficient arrow weight for my new whitetail arrow. Arrow Speed Calculator | Sirius Archery Products 2. Here is an example to demonstrate the use of the values above: Example: lets say you know your 400 grain arrow will fly at 350 FPS. For the least effort, draw your bow, aim at the top bullseye with your top pin, and check to see if from 50 yards your 50-yard pin, for example, coordinates with the bullseye covering your 50-yard group. High Velocity Crossbows. The same team that conducted the above research suggested a way to calculate the effective range for each bow/crossbow model: Divide the crossbow velocity (in FPS) by 10. While KE is an important factor in penetration, momentum is also critical because it determines the arrows ability to push through the target. 44 Yards - Maximum Effective Hunting Range. One thing to remember is that while kinetic energy provides the impact of your arrow on your intended target, what it doesnt necessarily provide is information on your arrows ability to penetrate and travel through your target. This average will get most bowswithin a few percent of real-world speeds. As you might expect, a heavier arrow flies slower than a smaller and lighter one. So the important question right now is: how much does initial arrow speed drop as its weight goes up? A 10 ft-lbs difference in KE can potentially result in a noticeable difference in the arrows ability to effectively penetrate the animal and cause a humane kill. The standard method of estimating and selling the raw arrow speed of a compound bow is complex and specific. Use this tool to optimize your arrows now.
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