compound bow

tradetraveljournal.com | How to use compound bow for hunting with | We will now go on to detail of How to use compound bow for hunting and the various types of bows available, their hunting possibilities, philosophy of use of each one of them, the ropes, design geometry of the different bow bodies and various “extras” that can be added to them for a more efficient operation.

We have to be clear about some concepts. If we are going to release with fingers or trigger. If we want a “longbow“, recurved or compound. That we must always go towards a power that we can DOMINATE under any circumstanceand with which we are at ease; very important factorthis and that will avoid possible future injuries; and finally, a correct choice of the arrow. A mediocre bow with a proper choice of arrow is a good hunting tool; on the other hand, a superlative bow with an inadequate arrow is useless. But we will discuss this matter in the section dedicated to the arrow and its correct choice. Depending, also, on whether we want to hunt from a high position or “tree-stand”, to stalk, or to the jump, some factors will have to be taken into account. In short, choose a bow with which we are totally comfortable and comfortable with it. This will be the basis of our future hunting trips.

Currently the composition materials of our bows are varied. Being able to go from wood to light alloys of aluminum, carbon, graphite and fiberglass, too. Compound bows will always be made of alloy; the other two types of arch may be constructed in any of the materials detailed above, or in a combination thereof.

We must bear in mind that the power that is capable of developing an arc is stored in the blades. They are the ones that do the job of driving the arrow back to its original position. Depending on each type of bow, a certain power curve and a certain result will be obtained at the beginning of the arrow’s flight.

The “longbows” and the recurved ones, at the moment that we proceed to open them, we observe that we have to overcome a resistance, more and more each time we open the arch. Compound bows, due to their special design and operation of the pulley, we will notice that the resistance to beat at first is strong, but that suddenly it decreases enormously and immediately we reach a point where we cannot continue opening more; This point is called a wall, and the previous point of maximum gear ratio of the pulley and minimum effort, valley.

Compound bows must go to the opening measure of each one of us. There are several ways to do it, one of them is for example, with the fist of the hand, which will hold the arch (right in left-handed and left in right-handed), closed and leaning against the wall, with the arm fully extended and the face in 90 degrees, we will proceed to measure the distance between the fist and our chin. That will be our opening. The arc power is normally marked at 28 “(hereafter” will be inches) of opening; if the archer has more opening, he will get more power, except for compound bows; logically, otherwise, you will achieve less. Question to be taken into account when choosing our bow. I will now detail a concept widely used in pulleys and that is the word “let-off”. Said expression refers to the reduction factor given by a certain compound arc. It is expressed as a percentage and in magnitudes from 60% to 85%. Explained in Christian, it means that if a pulley arc gives a power of 70 pounds (hereinafter #), and has a “let-off” of 80%, when we reach the point called valley, we will only be holding a force of 14 #. Which in a wait, that we hear enter a res, is much appreciated; the longbows and recurves, in this same situation, and having to make an increasing force ask to release the arrow immediately, therefore it is not possible to last long with the open arch; On the other hand, the compounds, due to the design of the pulley and its reduction, allow having it open for 2, 3, 5 minutes, without getting tired.

The straight arches or longbows

It is also known as an English longbow; among its characteristics its lightness and manageability stand out. It is the traditional arch par excellence; Low maintenance, smooth and quiet shooting can be detachable (take-down) for easy storage and transport, or in one piece. Generally made of wood, including noble woods. By gluing sheets of it together, and sometimes inserting other materials. They can be as long as one person. A differentiating detail about other types of bows is that the rope, once assembled, only touches the anchor points (tips). There are some master craftsmen (bowyers) in various countries, who make such bows to customer specifications (customs). It is a suitable bow for any type of hunting, mainly minor, although it is also valid for larger hunting. It usually has a progressive power curve, that is, as we open, it will increase the power of the arc, without drops, progressively and constantly. One way to compensate for your possible disadvantages in big game hunting is to use a heavy arrow; it will have a smooth and stable flight in search of the desired target. One way to compensate for your possible disadvantages in big game hunting is to use a heavy arrow; it will have a smooth and stable flight in search of the desired target. One way to compensate for your possible disadvantages in big game hunting is to use a heavy arrow; it will have a smooth and stable flight in search of the desired target.

The recurved arch

Suppose we have a “longbow” to which we have recurved the tips of the blades forward in their half, their blades will form an atypical “S”. This is the recurved arch. Of shorter measures than the “longbow”. They are usually made of wood, although combinations of various materials are also used. Fiber, carbon, graphite and aluminum in its construction, as in the previous case, noble woods too. They usually have a larger grip than the “longbow”; resulting somewhat heavier than the previous one, although on the contrary, they are more stable when it comes to handling. They are the ideal bows in their balance, in terms of precision, manageability, efficiency and weight when hunting. Its power curve is practically equal to that of the “longbow”, except that at a certain moment of the arc opening, it remains flat, not delivering more power, and then after a while it returns to deliver power again, continuing to open the arc; detail that is due to the design of the blades. They can be removable (take-down) or in one piece. The removable recurved ones are made up of three pieces: the body of the arch and the two blades, upper and lower. The demountables have the advantage that they allow the installation of various types of shovel, making it possible to mount more powerful, less powerful, longer, shorter blades, etc. depending on the hunting needs of the moment. They can be removable (take-down) or in one piece. The removable recurved ones are made up of three pieces: the body of the arch and the two blades, upper and lower. The demountables have the advantage that they allow the installation of various types of shovel, making it possible to mount more powerful, less powerful, longer, shorter blades, etc. depending on the hunting needs of the moment. They can be removable (take-down) or in one piece. The removable recurved ones are made up of three pieces: the body of the arch and the two blades, upper and lower. The demountables have the advantage that they allow the installation of various types of shovel, making it possible to mount more powerful, less powerful, longer, shorter blades, etc. depending on the hunting needs of the moment.

Although, in principle, the recurved arch would admit the use of certain accessories; both this and the “longbow” are indicated for instinctive shooting, that is, one that is performed with the sole coordination of the eye and the arm.

They tend to be more powerful bows than the “longbows”. Louder too, as the rope is in contact with the wood at its anchor points and the rope rests in the first part of the blades

As in the case of longbows, they are valid for any type of hunting.

The arch of pulleys or compound

This type of bow has been the one that has revolutionized the world of bow hunting. They admit so many modifications that they practically adapt to any person and circumstance. Basically its design is like the previous two. They consist of a body and shovels; but with the exception that at the ends of said blades there are some wheels that are the pulleys, and they are in charge of transmitting the tremendous energy that the blades develop to the arrow. Due to their design and geometry, we can consider pulley arches as the “magnum gauges” of archery. If we also add that an element known as a trigger is usually used in argot slang; that element would be equivalent to “hair”

It is the type of arch that in the least time has evolved the most from its origin to the present day. Originally its pulleys were two concentric round wheels; over time its design was modified, reaching the current day where the prevailing fashion is the “one-cam” style; that is, a circular pulley on the upper axis and an asymmetric and super-fast pulley on the lower axis. They are somewhat delicate bows in their handling and in need of a certain previous set-up. They support the installation of various accessories, such as a viewfinder, a stabilizer, a diopter on the rope, silencers, quiver … etc. etc.

They are usually fast arches, very fast. We are talking about speeds of the order of 300 to 330 feet / second (speed according to IBO standards, 5 grains / inch. The AMO standard is 9 grains / inch). Keep in mind that a good “longbow” or recurved, with comparable power, will barely exceed 170-180 feet / second, although with certain traditional models it is possible to achieve speeds of the order of 220 feet / second. Therefore its delivery of power to the arrow at the time of release is brutal, radical and energetic. Not being recommended in them the use of wooden rods. Lately the fashion is to get more and more speed to compound bows, But let’s think about one thing: for today’s hunting needs, are such speeds necessary? I honestly think not. If we have carried out our work correctly, a good 160-180 feet / second will be enough to impact the chosen piece …

Generally, compound bows are adjustable in their power; They have a range of usable power between 10 # and 15 #. In other words, our bow can deliver from 55 # to 70 #, for example; and only playing with the appropriate screws that are located at the beginning of each blade, and just above and below the body of the bow.

Logically there are arcs of higher power, up to 100 #; but these are extreme bows and for extreme animals too, such as the African buffalo, African elephant, rhino, etc. Bows that due to their enormous power not everyone is in a position to dominate, let alone maintain a constant series of training shots with them. 

I will comment a little on the different types of pulleys and their energy; Graphics are accompanied for your better understanding. With round pulleys, as you can see in the corresponding graph, the parabola made by the power curve is perfect,achieving a uniform distribution of energy throughout its route, being its broad valley and therefore giving a smooth and uniform exit to the arrow. With the “energy wheels” the curve is wider, therefore storing more energy and being smaller than the previous case; and finally we come to the “speed cams”; this type of pulley corresponding to the current asymmetric ones that carry the vast majority of compound bows today. As you can see, the energy they store is much higher than the rest of the previous pulleys. Printing to the arrow a huge and abrupt thrust force compared to the others and all cases measured in the same unit of time.

A separate case within compound arches are the cam arches whose maximum exponent is the Oneida brand and which is accompanied by an image. We can say that they are intermediate arches between a classic recurve and a compound bow. Its operation is by cams and must have a perfect synchronization between the two, due to its relative mechanical complexity, its adjustment must be carried out by expert hands.

Miscellany

For all the above, for Spanish fauna, both younger and older, there will be more than enough with powers ranging from 35 # to 65 #.

Let’s move on to the geometry of compound arches. It is an important factor, which from the outset can give us a certain idea about the behavior of the arc.

It will also indicate a radical arc, unstable, fast and difficult to handle, corresponding to an arc of reflex geometry. Let’s go into detail about the three types of geometry of an arc. They basically are applicable to the three existing types of arc.

We take as a reference to define each of them, the straight line that forms the most advanced part of our two blades, at the place of insertion or contact with the body of the bow and in relation to the bow handle.

  • The handle is in front of this line: deflex type arch. Gentle in handling. It admits loose with fingers, not producing pinching in the fingers at the moment of the opening of the arch.
  • The handle coincides with this line: straight type arch, or of neutral geometry. Also smooth to handle, and admitting loose with fingers. These two types usually correspond to arcs measuring over 37 “.
  • The handle is behind this line: reflex type arches. Bows, as I have said before, intended to achieve the highest possible speed, therefore, it is included with this: rasancia; also combined with the asymmetrical design of its lower pulley. They are usually short measures from 30 “to 35”, admitting only the use of a trigger. It is the design that forgives the least errors in executing the release of the arrow.

Regarding the types of pulleys, just comment that the compound bows that carry “twin cam” pulleys (two asymmetric pulleys) are prone to misadjustment, so it will be necessary to periodically monitor the timing of their pulleys. This problem does not occur in Hoyt arches with modern Cam ½ pulleys or current “one cam”.

The ropes. Basically, in archery, three types of strings are used. Dacron, Fast-flight and Dyna-flight. Each with its own characteristics. The dacron has a certain elasticity, so that at the end of its life, the rope will have gained some elongation; Fast-flight and Dyna-flight are more stable over the life of the rope and with Dyna-flight it is possible to gain 2 # extra power. Facing straight and recurved bows, it is possible to increase or decrease their speed, decreasing or increasing the string threads. Fewer threads, faster arc. The more threads, the slower. Traditional bows can only use Dacron strings; some of them with the modified “tips”,

Composite arches allow the placement of a visor. This viewer can be of various shapes, but the most common is the use of pins. The function of these pins is to adjust the bow so that the arrow hits target at predetermined distances known by the archer hunter, for example: at 10, 20 and 30 meters: at 15, 25 and 35 meters, if we use three pins . Or at two distances if we use only two pins. Its most complete use occurs when it is accompanied by a diopter that is placed in the middle of the rope, and through which we observe the pins; it is a way to avoid drift errors. Arc sights are generally height and drift adjustable.

One of the characteristics of hunting bows is that they have to be as quiet as possible. To do this, attachments, which can be made of plastic or fabric, are placed in the middle of the rope and both at the top and bottom; whose function is to eliminate, or reduce as much as possible, the sound that a tensioned string makes when returning to its original position. There are also shock absorbers, popularly known as “mushrooms” (limb savers), which are placed on each blade of the bow and whose function is to eliminate vibrations produced at the time of release, in addition to dampening the noise of the bow somewhat. Then there are also the quivers, which can be carried by the archer himself or attached to the bow (quivers).

There are also an endless number of different gadgets that allow us to customize or increase the benefits of our bow. But it would be too verbose to list them all here … Another of the premises that must be taken into account is that our arch be as functional as possible; in hunting conditions, and especially in remote destinations, it is not always possible to find this spare part that has been damaged or is missing due to forgetfulness; question to be taken into account when planning our future hunt.

To conclude, I would like to include here some letters from a well-known Canadian bow hunting outfitter, which I think are clear enough in this regard.