Which side of the slingshot is the front side

The front side of the slingshot is the curved side of the slingshot. Slingshot is generally composed of a bow frame, leather band, leather pocket three parts, generally made of tree branches, was "Ya" shape, on the two ends of the leather band, the leather band in the middle of the band to tie a parcel of projectiles on the leather block. The length of the slingshot is based on the length of the bow frame and leather band, and the leather pocket is sewn in the middle of the leather band. Slingshot bow frame and leather band is the main body of the slingshot, the bow frame is generally made of tree branches, there are two kinds of yam-shaped and bow-shaped, leather band is made of cattle tendons, there are different high and low three kinds, high, also known as the airplane skin, low, also known as the trailer skin, is not soft and not hard, is commonly used in common ordinary leather band.