The Theo Jansen mechanism is a kinetic sculpture that can move with the help of several pairs of legs.
Step 2: Tehnical data
Theo Jensen has calculated the right dimensions for this mechanism using computer simulations. So we will borrow these dimensions from him.
Note that two opposite legs, or a pair, will have a common "a" arm, double in lenght.
Step 3: Cut the straws
Make the "j" and "k" arms ten units longer and the "a" arm double in size.
For easier work, flatten the tubes.
Using adhesive tape, bind the pieces together. A pair of legs is formed by two modules, in a mirrored position, linked via the "a" arm.
You need at least 3 pairs of legs.
Step 4: Pin
Note that the two ends of each "j" and "k" arms are flatten in perpendicular planes.
Step 5: Together
Step 6: Crankshaft
Bend the wire in the shape of a crankshaft. The outside pair of legs must be in the same phase while the middle pair must be in the opposite phase.