In this challenge, we were asked to build a Bajaj that can protect people inside when under stronge bump. The idea is to show that we don’t need to build an entire can to prove our concept– building with low-fidelity materials can be a great way to do that.

 

During the first class we decided to build a shape of a round base and put two cups with one stuck into the other. So the shape of the cup can prevent the ball from popping out when it is strongly hit. Also, we put a glue inside the first cup so that to increase the weight of the Bajaj. Then we used foams to cover around the cardboard and put three fuzzy balls in the front as buffering. The string were hanged with both sides of the cup. Also, we put two dock of pokers on the bottom as extra weight to increase the speed.

In the test stage, because the rubber clip had too much friction with the string, it was not moving as fast as we want. So we all changed the rubber clips into metal clamps. Without overfriction, the second test went on well and did prove the safety of our design.

 

Later, we tried to modify our design and made a better prototype. We first used the cardboard to made a box, and then attached it to three triangular shape foams. The foams not only served as buffering but also served for aerodynamic purpose. Also, we put a windshield lining up with the angle of foams, which also for aerodynamic function. The string was attached by a four-way pipe which we hope could further decrease the friction. What’s more, we put a fin tail on the back hoping to prevent shaking. And because of the fin tail changed the center of gravity of the entire device, we put a block of wood on the bottom to change it back to the geometry center.

 

 

 

 

 

 

 

 

During the test, the pipe didn’t work as we expected. Overall, it is a really interesting experience.