The Golden Eagle bow, like other compound bows, has a very rigid structure that allows more of the energy from the draw (when the string is pulled back) to be transferred to the arrow. The rigid structure is called the riser. For Golden Eagle brands such as Splitfire 32, Litespeed Extra and Titan Express, the riser and handle are made of aluminum alloy. For the Sparrowhawk, Superhawk and Evolution models, the riser and handle are made of magnesium.
The limbs of the compound bow attach the cam and string components to the riser. A compound bow has an upper limb and a lower limb. The limbs of Golden Eagle bows vary in size and shape according to the model. The limb sizes are designated by letters, from largest to smallest, R,S,T,U,V,W. For example, the Splitfire 32 has a straight, R-type limb, the Titan Express has a recurve (bent inward), Z-type limb and the Superhawk a straight, T-type limb. Gold Eagle limbs are often made from a very high-tensile strength carbon composite material.
Wheels and Cams
The cam or wheel of the compound bow holds the string and rotates as the string is pulled taut. The string runs along the cam like a wheel and pulley. When the string is released, the cam returns to its original position. Golden Eagle bows have a variety of cam types with very specialized trademarked names. For example, the Sparrowhawk bow uses a Rapid cam and the Z-fire uses a Zen cam. Compound bows also incorporate a principle called let-off, the maximum force produced in the cam during the draw. It is given as a percentage of the bow weight. Most Golden Eagle bows have a 75 percent let-off, though Titan Express bows have 60 percent.
The cable (or string) is the part of the bow that actually propels the arrow. Cables in compound bows are made from much stronger materials than most traditional bows, usually from polyethylene (like all Golden Eagle cables) or even steel wire. The distance to which the cable can be pulled is called the draw length, or just draw. The draw of Golden Eagle bows range from 27 inches to 31 inches. Also, Golden Eagle bows have either black- or black-and-yellow-colored cables.