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Thread: Bowhunting and Archery Terminology

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    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    Default Bowhunting and Archery Terminology

    Bowhunting and Archery Terminology
    Archery Shooting Form
    In order to achieve consistent, accurate arrow flight, it is imperative to maintain proper form throughout the shot process. The components of proper form include, but are not limited to, correct stance, relaxed grip, bow arm positioning, and correct execution of the shot itself.

    Arrow

    The arrow is the projectile that is shot from the bow. Materials used include wood, aluminum, and carbon. Today, carbon is the most popular choice due to its strength, durability, and spine to weight ratio.

    Arrow Rest
    The arrow rest is positioned on the arrow shelf, directly under the sight window, and its main purpose is to cradle the arrow during the draw and launch process. Different models include stationary arrow rests and drop away rests. “Drop away” arrow rests are the most popular due to the fact that the launcher arms drop down before the arrow fletching reaches them. This reduces the contact between the fletching and the rest and results in better shooting.

    Arrow Shelf
    The arrow shelf is located just above the grip and below the sight window. This horizontal “shelf” is machined into the riser and it is the where the arrow rest will be attached.

    Axle to Axle Measurement (ATA)
    The axle to axle measurement of a bow is the distance (in inches) from the center axle of one cam to the center axle of the other cam. To attain maximum efficiency from your bow it is important to keep this measurement within the manufacturers spec range; most often within 3/16 of an inch of specified ATA.

    Back Tension
    Back tension is a technique that involves using the back muscles to trigger the shot; rather than simply commanding the trigger finger to pull the release-aid trigger. This technique often involves the use of specialized release aids, but can still be incorporated to some degree using a standard caliper release.

    Berger Hole

    The Berger Hole is used to attach the arrow rest to the bow. It is located on the outside of the arrow shelf along the riser. When setting up a bow, most mechanics will start by centering the arrow along the Berger hole.

    Bow Press
    The bow press is a tool used to relax tension on the bow string by flexing the bow limbs inward. This is done when maintenance work must be performed. Given the differences in bow geometry and limb configurations, caution must be used to insure the right press is used for the bow being serviced.

    Bow Sling
    The purpose of the bow sling is to promote a relaxed grip. This is accomplished by eliminating the chance that the shooter drops the bow after the shot. The bow sling is installed behind the stabilizer and essentially wraps around the bow grip where the shooter will place his/her hand through it. To prevent unwanted torque, insure that the sling does not fit too tightly around the hand but rather loosely.

    Bow String
    The Bow string is where the arrow is attached. On a two cam system is ends at the cams. On a single cam system the bow string ends at the bottom cam but travels around the top idler wheel. String life can be extended by applying string wax from time to time.

    Brace Height
    This measurement from the bow’s grip to the bowstring (when it’s in the relaxed, un-drawn position) dictates the window of time the arrow stays on the string during the launch process. Traditionally, shorter brace height bows (6 inches or less) are less forgiving than those with longer brace heights (7 inches or more).

    Broadhead
    Broadheads are used for hunting purposes only. Unlike field points, broadheads carry razor sharp blades and sharp points. There are primarily two types of broadheads; fixed blade and mechanical. The blades on a fixed broadhead remain stationary. The blades on a mechanical broadhead will be somewhat hidden during flight, but will “cam” open upon impact using a variety of methods.

    Cable(s)
    The cables are tied into the bowstring and work with the cams during the draw process and execution of the shot.

    Cable Rod
    The cable guard protrudes reward (perpendicular from the riser) towards the bowstring and essentially keeps the cables out of the arrow's line of flight. In most systems, the cables are attached to a cable slide, which runs along the cable rod when the bow is drawn.

    Cable Roller
    On some bows, the cable roller has replaced the standard cable rod/cable slide system. Instead of a slide, the roller system incorporates wheels to move the cables. This allows for greater efficiency and a smoother draw because friction is greatly reduced.

    Cable slide
    The Cable slide attaches to the cable rod and holds the cables. Most are made of plastic with some models incorporating special materials that reduce friction.

    Cam Lean
    Cam lean is a term that describes the amount that the cam, or cams, are tilted or canted off of the vertical center of the bow. This condition is a result of the cable(s) and or bow string being pulled to the cable guard.

    Cams
    Cams are located at the end of each bow limb and are round or oval in shape. The cams store energy and essentially transfer power from the limbs to the bowstring and to the arrow during the shot. Bow's can have either one or two Cams. On a single cam bow, the cam is located on the bottom limb while the “idler wheel” is located at the end of the top limb.

    Compound Bow
    The modern compound bow consists of a levering system which utilizes cables and cams to bend the bow limbs and transfer energy during the shot.

    D-Loop
    The D-Loop attaches to the bow string where the arrow is nocked and is used to apply even pressure along the string when a release aid is used to draw the bow back. Materials consist of a short piece of cord fixed firmly to the bow string by tying two knots.

    Draw Weight
    A bow's draw weight is measured by the amount of force (in pounds) required to bring the bow to full draw.

    Field Dressing
    Field dressing is the procedure of removing the internal organs from an animal that has been harvested by a hunter.

    Field Point
    Field points are most often referred to as "practice tips". They screw into the front of the arrow and come in a variety of sizes and shapes, and can also be purchased in 75, 85, 100 and 125 grain weights.

    Fletching / Vanes
    Arrow Fletching helps to steer the arrow in a rotational manner while it is in flight. Materials vary between real feathers and soft, flexible plastic. These plastic fletching, or feathers, is glued onto the end of the arrow opposite of the field point end. Sizes can dramatically reduce arrow speed (larger fletching) or increase it (small fletching).

    FOC
    Front of Center is a measurement that translates into a percentage of how far the balancing point of an arrow is forward of its measured center. Good FOC is critical for best flight stability. Most manufacturers recommend 10 percent or more weight forward for optimal control.

    FPS
    FPS is the “Feet per Second” an arrow travels when shot from the bow. Most bow makers list this number under an IBO rating which is acquired by shooting an arrow weighing 350 grains from a bow set at 70lbs draw weight and 30” draw length. If you want to reach a bows IBO speed rating, it must be shot under those conditions. Any variations will reduce speed.

    Grains
    A unit of measurement used when weighing an arrow and its components such as nock, insert, and broadheads or field points. Even arrows themselves are weighed in this manner by using a Grain per Inch (GPI) rating. Meaning, a raw arrow shaft will carry x amount of grains “per inch” of length.

    Grip
    The grip is the only part of the bow that the shooter touches during the shot (unless shooting with fingers). Most grips can be removed and replaced with aftermarket models to accommodate specific shooting needs.

    IBO Speed
    IBO speed is defined as the initial velocity in feet per second of a 350 grain arrow which has been shot from a bow having a draw length of 30 inches and draw weight of 70 lbs. This excludes the use of a peep sight or d-loop on the string.

    Idler Wheel
    Found on single cam bows, the idler wheel simple replaces the top cam with a wheel that only contacts the bowstring and not the cables.

    Insert
    The insert is a threaded aluminum unit that is installed into the front portion of the arrow allowing field points and broadheads to be screwed into it. They are hollow and are "inserted" into the arrow after it is cut to the desired length.

    Let Off
    Let off is the percentage of the bow's draw weight that is subtracted after reaching full draw. For example, a bow having a let-off of 80% will require the shooter to only hold back 20% of the actual draw weight: 70 pound draw weight - 80% let off = 14 lb full draw holding weight.

    Limbs
    Limbs are flexible, fiberglass planks that attach to the riser and support the cam system of the bow, as well as store and release energy before during and after the shot. Limbs are given specific weight ranges such as 50-60lbs, 60-70lbs, 70-80lbs, etc. The shooter can choose any weight within the limbs specified range. For example, 50-60 lb limbs offer any weight between 50 and 60 lbs. Limbs can also be replaced if these ranges in weight need to be increased or lowered.

    Long Bow
    A longbow is similar to a recurve except that it is much taller (roughly equal to the height of the person who uses it); and the limbs are straight and narrow. The limbs also appear circular or D-shaped in cross section.

    continued
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  2. #2
    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    Mechanical Release

    The Mechanical release is a tool used to aid the shooter in drawing back the bow and releasing the string. The shooter must hold the release or attach it around the wrist, then attach the “jaws” of the release to the bow string or D-Loop. At this point, the shooter can then draw the bow back. When the shooter is ready to release the string, he/she must squeeze the trigger of the release in order for the “jaws” to open. Most release-aids operate in this manner while some (specialized training) operate via back tension and rotating the shooting hand.

    Nock
    The nock is a plastic piece inserted into the rear of the arrow, opposite the broadhead insert, that allows the arrow to be “nocked” onto the bow string.

    Nocking Point
    The nocking point is the location on the bowstring where the arrow attaches. This location usually forms a 90 degree angle between the string and the arrow.

    Paper Tuning

    The Paper tuning method is done by shooting an arrow into a taut piece of paper at a very close distance. This technique will reveal to the shooter exactly how the arrow is behaving by the manner in which the fletching punches through the paper. For example, arrow oscillations will be easily recognized by uneven tears in the paper. An arrow that is flying in a straight line should produce 3 distinct lines through the paper; rather than an unrecognizable tear.

    Peep Sight
    The peep sight is a plastic, circular shaped device that is inserted between the strands of the bowstring giving the shooter a point of alignment. Similar to the front and rear sight of a rifle, the archer will line up his sight pins while looking through the peep sight. Consistent, accurate shooting is more obtainable while using a peep sight.

    Quiver
    The quiver holds the arrow for the archer and can be permanently mounted to the bow or removed depending on which model is chosen. They can also hold a variety of broadheads. Before making a selection, first consider how many arrows you want to carry, what type of broadhead will be used (fixed blade or mechanical) and the type of terrain they will be carried over.

    Range Finder
    A range finder is a hand-held devise which measures the distance and angle to the intended target and instantly transmits the information back to the user via an LCD screen inside the viewing eye-piece.

    Recurve Bow
    The limbs on a recurve bow curve away from the archer when the bow is unstrung. When strung, the limbs curve back toward the shooter and store more power than an equivalent straight limbed bow.

    Riser
    The riser is the long, central section of the bow which the limbs attach to. Most are constructed out of machined aluminum. Traditionally, longer riser bows are more stable at full draw.

    Sight Archery sights provide the shooter with an aiming point much like that of a firearm. Bow sights attach to the riser, just above the arrow shelf. Many sights contain fiber-optic pins. Some will use cross-hairs or laser dots instead. In addition, bow sights can come in multiple pin (stationary) models, or single-pin (moveable) versions.

    Silencing Aids
    Silencing aids can be purchased as after-market add-ons to absorb excess vibration---making the bow much quieter. These items can be attached to bow limbs, sights, arrow rests, and stabilizers. Some are even designed to be installed on the bowstring and cables as well.

    Stabilizer
    The stabilizer is a short or long device which is screwed into the bow on the front of the riser, just below the grip. They are primarily used to soak up vibration and add balance to the bow. They come in a variety of sizes and shapes as well as different materials.

    String Stop/Arrester
    These silencers are attached either at some point along the riser or at the ends of the limbs, and extend back toward the bowstring. When the string jumps forward at the shot it essentially collides with these rubber stoppers. Any excess vibration is quickly transferred from the string and soaked up by the stopper.

    Tiller Measurement
    To get tiller measurement the archer must measure from the point where the limb meets the riser, backward to the string in a perpendicular line. This should be performed for both the top and bottom limb and the measurements should be the same.

    Yoke
    The yoke is the “Y” shaped control cable that attaches to the outsides of the upper limb of a compound bow at the axle pin.

    Yoke Tuning
    Yoke tuning is done by adjusting each side of the yoke in order to achieve a linear trajectory of the bow string as it comes off the idler wheel at full draw.
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    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    Becoming a more skillful archer requires two things- lots of practice and intimately knowing your bow piece by piece. Why we can't make you practice every day, we can teach you the industry lingo you need to learn before you step foot into your next proshop. A better informed consumer is a better informed archer.

    The diagram below will help you correctly identify the various parts of your bow. They include the Riser, Limbs, Cams, String, Cables, and more. The only thing you have to bring is your arrow.

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    Senior Member wscywabbit's Avatar
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    Very nice Hutch. This should be made a sticky
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    Senior Member Ehunter's Avatar
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    Got a couple bones to pick with you on this one Bill. You left out MANY of the words that I often use during shooting and tuning! lol (AS would just edit them out anyways) Secondly, what in the heck are you doing posting a picture of THAT bow on here? lol
    Seriously though, I think your post was long overdue, and I think everyone will appreciate the post! Good job!
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    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    Quote Originally Posted by Ehunter View Post
    Got a couple bones to pick with you on this one Bill. You left out MANY of the words that I often use during shooting and tuning! lol (AS would just edit them out anyways) Secondly, what in the heck are you doing posting a picture of THAT bow on here? lol
    Seriously though, I think your post was long overdue, and I think everyone will appreciate the post! Good job!
    Well EH, the junk bows do better as examples not intended for public use!
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    Super Moderator bfisher's Avatar
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    Quote Originally Posted by Hutch~n~Son Archery View Post
    Well EH, the junk bows do better as examples not intended for public use!
    Agreed, and the pic is just as ugly as the real thing. Waffle bows----YUCK!!!!!!!!
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    Senior Member daiwateampenn's Avatar
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    great thread.

    will the list going on and on?

    looks like many still not in the list yet, and many new one will come out especially from AT and will make ppl faithed.

    Waffle, anyone? served with coffee or tea?
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    Super Moderator Arrow Splitter's Avatar
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    How would you like your waffle sir? With syrup or plain? LOL

    In Mathews' defense they do shoot very nicely.

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    Senior Member WildWilt15's Avatar
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    Hahaha as you can tell by my signature I have been having some pretty cold waffles for awhile now.
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