Bow and an arrow.

Bow and an arrow.

By: Ahmet Cengiz

First of all find a 6 feet stick. Then, determine the essential curve of the stick. To find the curve, place your stick on the ground, with one hand holding it in place at the top. With your other hand, push lightly against its middle. Make a plan and determine the handhold and the limbs. To find the handhold, make marks three inches above and below the center point of the bow. Anything within these marks is the handhold, above them is the upper limb, and below is the lower limb. Then shape the bow. This is the most important part. Place the bottom end of the bow on your foot, and one hand atop the bow. With your other hand, push outward, the middle facing you. Use this to catalog where the bow is flexible and where it is not. Using a knife carve the wood off the unyielding spots on the middle only, until both the upper and lower limbs curve similarly to each other. Check your progress frequently. When both limbs are more flexible and are mirror images of each other in curve and diameter, you are ready for the next step.You want the bow to be strongest (thickest) at the handhold.Be careful to only carve from the belly. An inordinate amount of pressure is exerted on the back of the bow, and even the slightest damage to its structure can promote breakage. Cut notches to hold the bow string. Use your knife to cut notches that begin at the sides and curve around toward the belly of the bow and in toward the handhold as they go. There should be one on each side about 1.5 or 2 inches (3 to 4 cm) from each end of the bow. Now select a bow string. It can be a rawhide, thin nylon rope, hemp cord, fishing line, strands of cotton or silk from caterpillars, ordinary twine. String the bow. Tiller the bow. Hang it upside down by the handhold from a tree branch or something similar so that you can pull downward on the string. Pull downward slowly, checking to make sure that the limbs bend evenly. From now on your finished with the bow to make an arrow. Select sticks for arrows. Shape the arrows. Don’t forget to sharpen the point of the arrow.  Last of all shoot to try and enjoy your bow. For more information and pictures you can go to the (https://www.wikihow.com/Make-a-Bow-and-Arrow). Also you can watch (https://www.youtube.com/watch?v=SLoukoBs8TE).

This relates to engineering by using engineering materials and creating a new object, which gives you the idea to create or build.