Catapult Launcher

Given our design constraints of 3D printed parts and the inclusion of a motor, we decided on a traditional catapult design, utilizing the rubber bands given to produce potential energy. Our design lead, Dylan, designed a ratcheting design, derived from click pens, to lock the motor into a specific position. Rilo and Tomoki designed the catapult arm and the side walls, respectively, while I added refinements, such as the rubber-band support, to provide additional clearance for the ball's trajectory.

Our catapult design went through multiple version, initially starting from a rough assembly, to adding multiple holes to adjust the stopper distance, adding braces at the bottom for stability, adding chamfers for structural stability, and iterating our crank design to optimize its length and path for the string. For extra points on the project, we changed the bottom platform from a fixed design and added slots to allow for pivot rotation.

We designed the parts in SolidWorks and created an assembly file, creating drawings from those files. Rilo and Tomoki also developed the project poster, outlining our design process, bill of materials, and drawings.