Design Rationales

Materials and Why we used them:

Wheels: For our car's wheels, we went with foam. We used foam because it is lightweight yet strong. After that, we put a thick rubber band around each wheel. This gives our car traction, and prevents unnecessary damage to the wheels when travelling on uneven surfaces.

Chassis: For our car's chassis, we went with acrylic. Acrylic is a transparent plastic, so it is quite strong, and it provided us with an added advantage of being able to spot the problems with our cars without having to break it apart or anything else. It also comes in various thickness. We chose the 3mm thickness one as it is the sweet spot between weight and toughness.

Lever mechanism: For our car's lever mechanism, we went with a pine strip. Pine strips are used by hobbyists from around the world. It is know for it's strength, which we are pretty sure that it will last through the rigorous testing processes.

Axles: We used a pine rod of 5mm diameter for the axle. We chose this one because we were literally bending every rod at the shop and figured out that this rod is quite strong, and cost efficient. The axle was put through an acrylic tube, of which was glued to the car. We added lubricant between the wheel and acrylic tube, to make the axles spin more "freely"

Positioning of Mousetrap: The mousetrap is placed at the front of the car. Our car is rear wheel drive so if we maximise the distance between the wheels and the mousetrap, it will increase the distance that the car is able to travel.


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