Tiger Strake Digital Fabrication

FINAL PROJECT Choice and objective The choice of the final project was easy for me. As I am enthusiastic about space and 3D-printing, I chose to design, construct and 3D-print a rocket. In merging my two passions in one project, I knew the outcome would be a success! The major objective of my project was: To build a parametric modular rocket that features thrust vector control. Research process I had already built smaller rockets at home and for school projects. I watched videos on model-rocket design and researched real launch systems through sources such as NASA and SpaceX. This helped me identify the key factors for a successful rocket design. Design process During the design process I focused on the modularity and parametricity. Another idea I had was to use a design for the thrust vectoring unit that I have never seen before. The design relies on the flexibility of the plastic to move. Another focus of the design process was the weight of the rocket. I wanted it to be as light as possible, but still durable. So I tried various wall thicknesses and found the best. Controlled, stable flight was another critical point for me. For this I used electrical components such as microcontrollers, gyroscopes and servo motors. Building process For the building process I used my Bambu Lab 3D-printer, as it is reliable and fast. I printed each module and could then twist-fit them. For the microcontroller, gyroscope and battery I designed a special housing assembly at the bottom of the rocket. Lessons learned 1. Persistence is essential Initially, I wanted to launch the rocket with a chemically driven propulsion concept. Because this approach was not allowed for safety reasons, I had to pivot quickly. Instead of dropping the project, I shifted to an electronics-based stabilization approach. In the end, that decision worked well and turned a setback into a successful Plan B. 2. Take calculated risks When Hiranya approached me in week 3 and asked if he could join my project, I was skeptical. I did not know him well and did not know if he would contribute in the same way as I was hooked to the project. In the end, I can say that his efforts were genuinely helpful and his different approaches and strengths helped the project to thrive. Without his ideas, the rocket would not have been as complex. 3. Building a reliable rocket takes significant time I underestimated the total development time. I had designed and printed smaller rocket-related parts at home before, but this project was on a different level of complexity. I had to reprint the outer shell multiple times to get the fit right, and integrating the gyroscope and control logic also required substantial iteration. Conclusion To me, my project was a complete success. The next step for me will be to actually let it fly. Final video: <video width="600" height="380" controls> <source src="Presentation Rocket Project Harvard PHYS S 12 2023.mov" type="video/mp4"> </video>