Reduce the IBO speed until the calculator shows the verified speed of 315; in this case the correct IBO value would be 346 fps With the disadvantage of my short draw length of 27.5-inches and my draw weight of 60-pounds because of a bad shoulder, I decided to go with the fastest arrow within that range, something right around 400-grains. Notice that at 250 FPS this value cannot be achieved. Arrow Speed Calculator | Archery Calculator - CalcTool In other words, how much force is required to stop an arrow? For every 3 grains of additional weight on the bowstring, subtract 1 ft/s from the IBO value. And of course, most of us operate within a more or less fixed budget and don't enjoy the idea of spending $3k-$4k on one of the latest and greatest models. Sighting-in your crossbow properly to compensate trajectory. To find the distance that your arrow will travel, you can use the projectile motion calculator. The only way to find the exact speed of your specific arrow is with an arrow chronograph. 475 grain arrows will fly at ~92.3% of initial speed calculating loss in fps using heavier arrows than - Crossbow Nation Please keep in mind that this approach will only give you close estimates, and that it becomes a less accurate the further out we go (I wouldnt suggest using it for anything beyond 70 yards, which is far beyond what youll be hunting from anyway). This tool should get you close to that. Mid-Range Rise; Mid-range rise when sighting in a crossbow is the highest point in the arrows trajectory between the point blank range and the true zero point. If your target is to find how fast an arrow travels, then you aim right because the arrow speed calculator will easily help you with that With this archery calculator, you'll also be able to identify the different factors and what values can help you improve your arrow's speed. For whitetail deer this requirement is lower any crossbow 250 FPS and up will be a safe pick. For example, a bow designated as IBO 330 could achieve greater speeds than a bow rated as IBO 300. A feather traveling at 20 mph might sting, or might not even be felt, depending upon how it strikes. Many bowhunters buy arrows that fit their bow, their draw weight, and their draw length; but fail to understand the unique characteristics of each arrow and the arrows ability to penetrate and kill the wild game they are hunting. Power stroke is the length between the crossbow's string in its full-draw position and at rest point. Crossbow Kinetic Energy - Chart, Calculations, Requirements Finally, enter the Additional weight on the string if this is known. The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user. By drawing your bow, you convert mechanical energy (ME) and store it as potential energy (PE) in the bow limbs. While it is based on the bow speed IBO specification, you can input the individual settings of your bow. Consider More Than Speed When Buying a Crossbow - TenPoint This is as close as it gets to what your arrows will deliver in the field, though keep in mind that our tests were conducted at an indoor range to avoid wind and weather fluctuations which can impact arrow behavior, so actual kinetic energy values in the field can and probably will vary slightly from what we arrived at in our tests. 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. *Slugs can be converted to Pound-Seconds by multiplying the result from the above formula by 32.174. The rule of thumb was that for every added inch of draw length, you increase raw arrow speed by approximately 10-15 fps. In general, all three methods can be used with equal success as there is little difference in measured speed. So the important question right now is: how much does initial arrow speed drop as its weight goes up? You can also see how increasing your arrow weight will increase kinetic energy and momentum, but then decrease kinetic energy when the speed of your arrow decreases to the point where it can no longer provide the force necessary to increase your arrows lethality. Three main factors determine how fast a crossbow will shoot: power stroke, draw weight and arrow weight. The technical storage or access that is used exclusively for statistical purposes. A 70#/29 bow that's rated at 350 fps is has been chronographed at 315 fps with a 400 grain arrow. Every 3 grains of total arrow weight above draw weight multiplied by 5, will subtract 1 foot per second from the IBO value. For every 3 grains of total arrow weight above draw weight multiplied by 5, subtract 1 ft/s from the IBO value. The arrow ballistics calculator below will help you determine your arrows vertical drop, speed, kinetic energy and momentum, for up to 70 yards out in 10 yard increments. Frames per second (FPS) Calculator | PC Builds Thus, when a manufacturer touts its bow as having a speed of, say, 350 fps, the truth is that a hunting weight arrow of 400-450 grains from that same bow will initially leave the bow much slower especially if the draw weight and draw length are significantly reduced. Use the Arrow Efficiency Calculator to find the optimal arrow for your bowhunting setup. Created by the International Bowhunter's Organization, the IBO speed is given as a speed value in feet per second (fps or ft/s), and the higher this number is, the higher the speed that could be achieved with that particular bow. A longer draw length results in a longer power stroke than a shorter draw length, allowing the bow to store more energy that then is transferred to the arrow. Notice that our recommendation for elk hunting is 65 ft-lbs of kinetic energy (this is a conservative value, you can get away with less). Calculate arrow fps speed How fast does my arrow travel. 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. When you input your bow and arrows information in the calculator below, you can see right away what your arrows potential is. If you use the chart above to compare kinetic energy between a 350 FPS and a 300 FPS crossbow, youll notice that the first one delivers significantly more KE at 50 yards, than the second crossbow does at even 10 yards! It will give you a rough idea of how fast an arrow travels after changing the bow from the recommended specifications. The calculator uses this data, along with AI models, to predict the performance . How to determine the optimal shooting range for my crossbow? These are calculated as follows: Our arrow speed calculator converts the units automatically. To make the change inarrow, I went back to ourArrow Efficiency Calculator. 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. While KE is an important factor in penetration, momentum is also critical because it determines the arrows ability to push through the target. Archery Hunting 101: Bow Hunting for Beginners. 36 Yards - Maximum Point Blank Hunting Range. 2. Also, make sure to check out our best crossbow rankings for a scoop on the top equipment on the market. of draw weight. This is because the large draw weight imparts more energy to the arrow. For every inch of draw length above 30, add 10 fps to the IBO value. Maximum Point Blank Range; Maximum point blank range when sighting in a crossbow is the height of the mid-range rise and the arrow drop beyond true zero, both are equal in measure. This arrow speed calculator allows you to accurately determine the speed of an arrow. Ever wonder exactly how much kinetic energy is released by an arrow, based on its initial speed and distance traveled? Arrow speed Value must be between 100 and 500 Feet Per Second. Four terms to know when properly sighting in a Crossbow. Its only from 300 FPS and up that you get enough kinetic energy at all feasible hunting distances (up to 50 yards) to be able to comfortably hunt elk. Arrow Speed Calculator - Danger Close Outdoors Mine hits dead nuts from 30 out to 135 yards. You can obtain this value with this formula: An arrow's kinetic energy is determined as: Keep in mind that the arrow loses speed as it travels. Two main ways in which speed affects precision: First, faster arrows have flatter trajectory, meaning they drop less as they fly toward their target. How far will it penetrate? The crossbow community has been obsessed with velocity ever since the resurgence of the crossbow as a viable weapon for hunting. Generally bows will put slightly more energy into heavier arrows, so the actual speed you get with a heavier arrow will probably be a little higher than this formula calculates. Welcome to our Arrow Speed, Kinetic Energy, and Momentum Calculator, where you can easily calculate your arrows speed, kinetic energy, and momentum based on the IBO speed of your compound bow, your draw weight, draw length, and arrow weight. The overall weight of the weapon, its balance, arrow weight, ease of cocking, and precision are also important. To exaggerate to make a point, a one-pound arrow would plummet to the ground the minute it left your barrel. Light Blue: Range of efficient arrow weights. TenPoint today unveiled its new-for-2022 Nitro 505, the fastest crossbow in company history and one that sets a new industry standard with an advertised speed of 505 feet per second with 400-grain bolts. Kinetic Energy: 5.55 foot-pounds. Red: Highlights specific speeds in fps and MAX energy (KE and M). Keep in mind that most IBO ratings are not real-world numbers. You can check this calculator to see how fast the arrows lose height at different flight speeds. Arrow Ballistics Calculator - Kinetic Energy, Drop, Momentum 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. The Best Crossbow Bolt Weight for Your Specific Hunting Crossbow For the most accurate results, it is best to use a known speed and known arrow weight under 6 grain per pound todetermine your "corrected" IBO value. Draw weight: The more draw weight you pull, the faster the arrow will fly. For the most accurate results, it is best to use a known speed and known arrow weight under 6 grain per pound to determine your corrected IBO value. You will find that most modern bows are more than capable of killing most game animals. In the calculator below, we measure this in slugs. Which means that if you want to be able to reliably hit live targets at 40 yards, you better have a crossbow that is able to launch arrows at 400 FPS or more. As you know, IBO speed is a standard measure of the speed of a bow, and by using it as a baseline for all calculations, our calculator can provide you with accurate and reliable results. Because there is a huge difference between shooting a deer with a 300 FPS crossbow and a 400 FPS (or faster) model. Speed is needed to make the arrow arrive at its target quickly, but arrow speed is not what kills the animals you shoot with your bow. For a more detailed explanation, check the notes below the calculator. This is because the IBO speeds are determined under a set of particular conditions: Then, for comparing bow speeds, you'll need tomaintain these factors constant. FPS calculators (Frame per Second) work by using large databases of FPS records for various processors and graphic cards. Momentum: 0.111 slugs. 450 grain arrows will fly at ~95% of initial speed Whitetail deer is particularly proficient at doing that. Anderson, SC, 2023 N1 Outdoors. It's also worth noting that these variables are affected not just by the arrow's speed vvv but also by its mass AAA. 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. So to what extent the arrow velocity affects the effectiveness of this type of weapon? Muley Short Sleeve T-shirt | Solids, Coues On Short Sleeve T-shirt | Black/Gray, Western Whitetail Multicam Flexfit Mesh Cap, +/- 1 inch change in draw length ~ +/-10 FPS, +/- 10 pound change in draw weight ~+/- 18 FPS, +/- 3 grain change in arrow weight ~ +/- 1 FPS, +/- 3 grain change in string weight ~ +/- 1 FPS. For every inch you reduce, the draw length reduces around 10 fps of your bow speed. Mike is an avid archery hunter and brings a military methodology to his hunting and life. arrow weight can seriously affect the speed, Arrow Speed, Kinetic Energy, and Momentum (Penetration) Calculator, Draw Length Calculator: Get Accurate Results Fast, Arrow FOC Calculator: Measure & Calculate FOC Fast, How to Buy Arrows for a Compound Bow (The Right Way), Arrow Weight Calculator: Optimize Your Arrows for Hunting, Understanding Arrow Spine and Spine Deflection for Hunting, Large Game (elk, black bear, wild boar, etc. This is a good rough rule to remember in case you need to do some quick on-the-spot kinetic energy calculations in the field. But it cannot. *Our website is supported by our users. Point Weight (Grains) Lets find out. The IBO method (detailed in the arrow speed calculator instructions above) sets up a bow and an arrow weighing 5 grains per lb. At the time lets call it the Round Cam Epoch the chase was for 200 fps. Arrow Efficiency Calculator: Optimize your bowhunting set up. Arrow Speed Calculator Bow Manufacturer IBO Speed move slider or enter value ft/sec Draw Weight move slider or enter value lbs Draw Length move slider or enter value inches Arrow Weight move slider or enter value grains Weight Added to String (20gr=peep only, 45gr=peep and tube) move slider or enter value Point Blank Range; Point blank range when sighting in a crossbow is the first point at which the line of sight intersects with the arrows path in the arrows trajectory arc. The arrow speed calculator makes it easy to estimate the speed of an arrow! Once you have this figure, you can calculate the kinetic energy produced by your bow. *NOTE: The calculator below will provide you with an estimate based on your inputs. Kinetic Energy & Momentum Calculator Find out the kinetic energy of your arrow or bolt using the following simple calculator. 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. If youre planning on using 450 grain arrows, the information above suggests that your arrow will leave the crossbow at a speed of around 380 FPS (95% of 400). I remember when I first started bowhunting; it was right around the time I became a teenager. And second, faster arrows leave less time for the animal to react to the shot sound. This is where this bow speed calculator comes in handy; it allows you to examine how the arrow will behave under a different bow setting. *Initial speed = our base speed determined using a 400 grain arrow: 425 grain arrows will fly at ~97.5 of initial speed The most critical factor is the IBO speed entered as this is the starting point of the calculations. When an arrow is shot from your bow, its impact, and ability to penetrate and make the kill is based not just on the speed of your bow. Factoring in the gravitational constant in both of those formulas for hunting arrows is necessary to account for the effect of gravity on the arrows motion. What is important, is understanding how this impacts the arrow you choose to buy and use when hunting, along with the broadheads you use. There are several factors that go into the arrow speed equation. By simply indicating the particular values of some parameters, this tool will help you calculate an arrow fps speed. When shooting a compound bow, all things being equal, they are: Many bowhunters dont quite understand the complexity behind bow speeds. We operate independently and do not provide Sponsored content. For example, a 500 spine arrow bends .5 inches when the weight is applied. So let's focus on that. Which results in easier aiming and thus, in improved precision. As a general rule, with every 10 pound increase in draw weight, arrow speed rises by around 20 fps. 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 arrow speed calculator makes it easy to estimate the speed of an arrow! there is very little difference in trajectory when you sight in at the recommended distance that is supplied with most crossbows. When you properly sight-in your crossbow for hunting you want to have a flat trajectory, the flatter the better. Arrow weight AAA If you guessed that the size and weight of an arrow influence its speed, you're correct. ), Any additional weight on your bowstring (nock loop, peep, etc.). For example, it takes approximately 40 ft/lbs(+or-) of kinetic energy to kill a whitetail deer. In arrow flight, trajectory refers to the exact arcing path the arrow travels from the crossbow to the target downrange, as soon as the arrow leaves the power of the bowstring it is subjected to atmosheric drag (slowing it down) and gravity (pulling the arrow down to earth). Bowhunting: Know Your Arrow's Flight Path - An Official Journal Of Another common speed rating is the ATA rating, which uses a 30-inch draw length, 70 lb. Bowstring weight: Adding weight to a bowstring (peep sight, string silencers, string loop) will affect raw speed, but not by much. What allows an arrow to ethically and effectively kill wild game is a combination of kinetic energy and momentum. This does not affect or reflect on our recommendations or opinions. 575 grain arrows will fly at ~84% of initial speed Heavy arrows, coupled with the right speed for your target animal, optimized by a high FOC, can accomplish a lot more than a light, fast arrow. Arrow Ballistics Calculator Kinetic Energy, Drop, Speed, Momentum, Crossbow Kinetic Energy Chart, Calculations, Hunting Requirements, Crossbow Arrow Drop Charted Test Results. Putting it all into perspective. The speed decreases exponentially as the arrow travels. The technical storage or access that is used exclusively for anonymous statistical purposes. Crossbow Arrow Drop Calculator - Crossbow Country Then, the more draw weight you use to pull, the quicker an arrow will fly and the more kinetic energy it will have. At the rated 350 fps IBO the speed should be 319 so we know that the IBO is slightly high. If you were to shoot a 600 grain arrow instead, your initial speed would be roughly 82.5% of 350, or around 290 FPS. The chart below, and the research conducted is copyrighted material and is the property of BestCrossbowSource. Sight compensation of trajectory. This is what we included: The IBO speed is used as a standardized speed rating for bows. 2. Plan. You can assume, roughly, that an arrows kinetic energy is reduced by around 3-4% for every 10 yards it travels. 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.