Hydraulic Arm - "2. Arms, joints, and base"

*** The procedure and figures are not representative of the entire methodology, since I was not able to capture every step while making. ***

Arms, joints, and base - These components form the main body of the hydraulic arm

Fig. 1

1. Cut out 2 cardboard sheets with dimensions 20cm × 4cm as shown in figure 1, and 2 more with dimensions 25cm × 4cm. The 2 sheets with dimensions 20cm × 4cm becomes the primary arm (directly connected to the base) and the 2 other sheets with dimensions 25cm × 4cm becomes the secondary arm (connected to the primary arm).

Fig. 2

2. Cut out 2 trapezium shaped cardboard sheets with bases 8cm and 5cm, and height 13cm as shown in figure 2. These form the base of the hydraulic arm.

Fig. 3

3. Link the 6 cut out cardboard sheets in a way that the 20cm × 4cm sheets become the primary arm, the 25cm × 4cm sheets become the secondary arm. Make each link with a toothpick and two square outer layers with an instant adhesive such that only the outer part is glued, making the inner part (the arms) flexible. The result is shown in figure 3.