Identifying Certain Factors That Give Hunting Arrows Improved Performance in Windy Conditions and Increased Energy Downrange
Total Page:16
File Type:pdf, Size:1020Kb
(Opposite) Variables such as arrow diameter and fletching size play a huge role in downrange arrow performance. (Below) Easton’s AXIS arrows are a top choice for bowhunters looking to maximize wind drift and energy downrange since they are ultra-small in diameter and weigh about 9 to 10 grains per inch of shaft length. This allows for a total arrow weight well beyond 400 grains. Identifying certain factors that give hunting arrows improved performance in windy conditions and increased energy downrange. By Joe Bell Ample front-of-center weight is crucial for top accuracy when an arrow is subjected to a strong crosswind. The more front heavy the arrow is, the greater its steering capability becomes. This lessens point-aim errors and increases accuracy. he crawl was one of the Eventually, I made it to 45 yards— the arrow to strike. I became ecstatic. longest I’ve ever made on a as close as it was going to get. I felt The caribou ran over the rise and big-game animal. For hours I confident making the shot. I nocked disappeared. My guide and I later had been laying and slithering an arrow, came to my knees, and found the bull lying stone dead in a around in the spongy tundra waited. Several of the cows soon got patch of spruce. Tgrass, doing my best to get inside nervous and rose from their beds, and While soaking in my success, I bowrange of a nice woodland bailed over a small rise. I knew it was a began to reflect, and quickly realized caribou. It was cold, windy, and my matter of seconds before the bull I had totally forgotten to compensate raingear was doing little good keeping followed suit. Meanwhile, a fierce for the wind during the heat of the me warm. Water seeped in from the wind whipped across the tundra, moment. Yet, somehow, my arrow cracks, staying inside my arm and bending frozen grass like wet noodles. struck spot on. How could this be? chest cavities, chilling me to the I wondered how the gusts would affect The wind was easily blowing 20 mph bone. my arrow’s flight and told myself to that day, if not more. I pondered In addition to the frigid conditions, aim off a little, just to be safe. things for a bit and quickly concluded the stalk was tricky. There were some As soon as the bull indicated that I must have just gotten lucky, or, dense spruce bushes to navigate getting up, I hit full draw, and eased my arrow was incredibly effective at through, and the bull had a long string the 40-yard pin ever so slowly just bucking the wind. of cows bedded beside him. I moved above his last rib. He was quartering, After packing the caribou out, I only when all eyes looked away, or with his eyes looking straight away. decided to experiment a bit and took when shielded by ground cover or a When everything felt right, I subcon- some shots near the hunting cabin. A swell in the topography. I had to sciously triggered the release. I saw a strong wind was blowing as I homed remove my hip quiver frequently as glint of arrow flight, followed by a in on a large leaf on a mud bank I tunneled my way through the patch of grayish fur leaving the about 50 yards away. I watched as all tangle-foot spruce. caribou’s side right where I had wanted three of my broadhead-tipped arrows 30 BOW&ARROW HUNTING BOW&ARROW HUNTING 31 Click here to read more Articles tag soup. To avoid this, you must be archers use small-diameter arrows to side-surface area and a faster axis of diligent in equipment selection. Arrow enhance shooting accuracy, so should rotation. choice is one of the most important hunters. The reason, of course, is For example, let’s take three elements, as I found out that day purely mathematical. The cross- different shaft diameters. A large 2315 hunting caribou. sectional area of a skinny shaft versus a aluminum (measures about 11/32- In this article I’ll discuss five key medium-width shaft may not seem inch wide), a typical internal-com - components that give arrows improved like much up close, but when you take ponent carbon (about 5/16-inch 5,>-69 performance downrange in windy into consideration the entire length of wide), and a super-narrow Easton Axis 2009! conditions. Western bowhunters, the shaft, the difference is substantial. Series (about 17/64-inch wide). especially, will benefit from this infor- With inches less of side-surface area, Now, if we were to outfit each of mation, as will any tree-stand hunter the wind has less mass to blow against. these arrows with vanes mounted at a KWIK-3®SS Western big game, especially pronghorn antelope, who occasionally shoots at deer across This lessens the affects of wind drift 5-degree helical, the spin rates would usually require longer shots across expansive, large windswept fields or food plots. and takes the guesswork out of where vary for each shaft. For every one full windswept country. Arrows equipped with aerody- to aim. rotation, the 2315 would have to namic components will fly more true and on target. BENEFITS OF SMALLER ARROW Of course, today’s premium travel forward 8.8 inches, the 5/16- DIAMETER outdoor target shafts are not suitable inch carbon 7.99 inches, and the A few weeks ago, while attending a for using broadheads—the shank is skinny 17/64-inch carbon 6.8 inches! major outdoor 3-D shooting event, I too small to accept a threaded broad- (Due to variables such as wind and had the opportunity to watch several headbody. However, there are some drag, these are not actual numbers, of the nation’s top shooters challenge pretty skinny bowhunting shafts now but relative.) themselves against tough shooting available. One of my all-time favorites This spinning and air drag is conditions. It rained the majority of is the Easton Axis Carbon and Axis known as centrifugal force. Basically, the time during the three-day shoot, Full Metal Jacket series. Such shafts think of a simple tabletop. When you with wind blowing occasionally. Yet reduce surface area values by up to 15 slowly spin it, it tends to wobble. But these gifted bow shots continued to percent or so com pared to normal-size if you spin it faster, it builds up air A heavier, smaller broadhead, such as the New Archery 125-grain Nitron, offer a great combi- 5,,+(8 <0=,9 ;6 lace the small orange “kill” spots on carbon shafts, and up to 20 or 25 resistance or drag and becomes stable, nation, since it will tune easily and fly more true in 4(;*/@6<9 )6>& the targets nearly every time. I looked percent compared to large-diameter all- no longer wobbling. An arrow the wind. Many bowhunters have discovered that some shafts stabilize sufficiently well using smaller-style closely at their equipment, and at the aluminum shafts. This kind of arrow functions similarly; it must spin fast fletching, even those designed for target shooting. end of each shooting day, the top can reduce the wind planing effect and enough so that fletching creates the will fishtail or wag in the direction of Using less fletching and weight reduces flight drag scorers had one thing in common: result in more hits afield. right amount of air drag to make it the crosswind, wanting to follow the and wind drift, and gives arrows more front-of- they were using the smallest, skinniest Another benefit to using smaller- path of least resistance. However, the center weight. This tends to make them faster and stable in flight. more accurate in windy conditions. Pictured are arrow shafts you could buy—similar in diameter arrows is the reduction of In the end, this means smaller- heavy part of the arrow (the front end) AAE Max 2.3 vanes (above). size to coffee straws! fletching drag needed to properly diameter arrows not only give im - keeps the shaft from completely For the same reason outdoor target stabilize the shaft. This is due to less proved flight trajectory downrange somersaulting and tracking true, landed only within 3 inches of the (due to less surface area and drag) but despite the force. leaf! I was aiming dead on. they give the ability to use smaller With physics in mind, the higher Luckily, for this hunt, I switched to vanes or less vane helical without the front-of-center weight, the less a heavier-than-normal arrow (about theoretically sacrificing loss of arrow leverage effect the wind has on fish - 475 grains), mainly for deeper stability or control. tailing or “planing” the arrow. This penetration on moose, another species lessens the degree of point-aim I was pursuing on the trip. It was ARROW WEIGHT AND FOC errors. also small in diameter and constructed Any time you increase an object’s “Heavier shafts drift less in the of both carbon and aluminum. It weight, you increase the amount of wind, and more front of center will measured 27 inches from nock throat inertia or force that is required to move improve your group size,” says Darin to insert and boasted a 125-grain low- it in one direction or another. This is Cooper, a brilliant engineer and pro- profile fixed-blade broadhead and why heavier bullets and arrows are level archer with many tournament lightweight 3 3/4-inch plastic vanes— better for bucking the wind—it takes wins and bowhunting trophies on a combo with a front-of-center weight more resistance to create sideways drift.