In the assembly of the air cannon, I realized that I needed to use different assembly techniques for different materials, for example, I could not use the fabric assembly method for the wooden handle, nor could I use the wooden handle assembly method for the spring part. After my personal experimentation and advice from my teacher, I finally determined how each part of the assembly needed to be done.

First, the handle, my handle is assembled with multiple pieces of wood, consisting of two 8 cm and two 6 cm sticks, with screws to form a hollow rectangle used as a place for the hand to hold. A 15 cm long and 3 cm wide cylinder has the same way to link the handle. Finally, the two middle hollow 3 cm pie-shaped wood mounted to the long cylinder is used to connect the fabric. I will cut out a 3 cm size hole in the very center of the fabric. On each side of a wooden cake and then the entire handle through the three items to play a fixed effect. The fabric is tied to the barrel body with a string. Finally, a hook is installed at the end of the handle to connect the spring to make the fabric flexible. A woodcutter and an electric screwdriver were used throughout the process.