Understanding the Compound Bow
A compound bow has a levering system which uses the upper and lower parts of the bow known as limbs to bend, thereby generating enough power to shoot out the arrow.
The difference between these compound bows and the traditional wooden longbows, among other things, is the lack of flexibility in their limbs. With time, it became apparent that wood was not the nest in transmitting power and flex the way modern bows do.
The bow manages to transmit power through the presence of pulleys and levers, despite it being stiff. This is how it manages to work. As a hunter draws back the string, some mechanical advantage causes the development of power, so much so that it gets to its highest point, which then is released and it pushes out the arrow.
These compound bows can be used in any kind of weather. In the olden days, wooden bows were not usable when it was damp, since they got to absorb the moisture. They therefore had limited transmission of the necessary power. When it gets hot and dry, wood is also likely to crack.
The compound bow was initially not the most popular weapon of choice for most hunters. Hunters were not ready to give up their beloved longbows. As time went by and its performance was evident, more and more of them took them up. Its current speed and accuracy has made them see it in a different light.
There are ongoing debates over which materials and manufacturers make the best compound bows. The makers of these compound bows rely typically on aluminum, magnesium, or an aluminum alloy that is also favored by the aircraft making industry.
The limbs of a bow are what will serve up most of its strength. The pulleys and levers have no part in the generations of this strength. The cams and wheels need to be constructed well, to allow for their smooth movement as they bring along the string. As much as it shall continue being called string, it is hardly made of this, but rather some advanced materials. We now have some made from highly efficient high-modulus polyethylene cables. They can take up so much tensile strength. They also do not stretch, which would have made them less efficient. Earlier versions had a high tensile coated steel cable, before the switch.
The speed of an arrow is managed by the cams present in the setup. Cams are usually categorized as soft and hard types. Softer cams are usually for those still learning archery.
If you want to take up archery, you will have to buy a bow. There are many websites where you shall find the one you are looking for.