Drill-Powered Bike

Sep – Dec 2025

Drill-Powered Bike

This project aimed to design and build a hand-drill-powered bike, applying principles from Component Design, including engineering analysis, design iteration, and manufacturing. Our team optimized for maneuverability through extensive CAD modeling, stress and bearing calculations, gear analysis, iterative feedback, and troubleshooting ambiguity.

As the Project Manager for a group of 5, I prioritized clear communication through tools like Trello to track task assignment and completion. To facilitate success, I created an 11-week timeline and oversaw all aspects of the project. My organization helped the team deliver a functional product 2 weeks ahead of schedule. I encouraged collaborative discussions and problem-solving during key decisions, such as how to align the drive chain. I stepped in to resolve conflicts and fill in gaps when needed, contributing heavily to CAD modeling, technical drawings, and playing a major role in manufacturing and assembly. While refining these skills throughout this project, I learned much about persistent leadership, appropriate engineering analysis methods, material selection, and DFM. The bike successfully stayed under a $200 budget / 50 lb weight limit at just $133 / 37.5 lb.

Maneuverability Competition: 4th Place — 48.4 seconds

The Run Off: 27 Teams, 13 Competitors

Bike at the 2025 Run Off

Culminating the semester at the 2025 Run Off was so fun! All our hard work had paid off in a bike that was fully functional, fast, and had a very unique design compared to others. Our group, Team Rocket, completed the Maneuverability course multiple times, weaving through cones, passing under a 3ft tunnel, and making 2 5ft radius turns — despite the unanticipated snowfall the day before!

The first run with our working vehicle on the challenge course was incredibly successful.

It was very rewarding to take home 4th place during the Run Off with this take at the course.

CAD vs Actual Model

CAD model view 1
CAD model view 2
Actual bike view 1
Actual bike view 2
Bike photo 1
Bike photo 2 Bike photo 3
Bike photo 4 Bike photo 5
Bike photo 6 Bike photo 7
See Some of My Work!

We began by collaborating on the original design. I facilitated discussion about which features and dimensions we wanted and digitally drew out the ideas. I ended up completing most of the preliminary SolidWorks CAD, including the frame, front fork, drill plate, and drill. The hours I put into the CAD model were worth it, as the majority of these items remained consistent throughout. I also created most of the drawings. We had a Design Review with the course team and then reworked some of the design and drawings based on their feedback. I met with the TAs and machinists in advance of this presentation to begin implementing their advice.

SolidWorks CAD model1
FEA analysis screenshot2

I ran FEA on the frame to evaluate the factor of safety, stresses, and reaction forces compared to our hand calculations.

Sourcing and cutting tubing3

I sourced 16ft of 14-gauge A513 round tubing and cut it on the bandsaw.

Coping and sanding tubes4

Overall, I properly dimensioned and cut 9 angled copes followed by sanding and sandblasting.

Welding the footrest5

Knowledge from previously taking a welding workshop helped me tack and finish the footrest.

Mill and lathe work6

I worked on the mill and lathe to create the disk brake supports, head tube, pillow blocks, and refine the drill plate.

Team meeting during lab7

During and beyond our lab period, I continuously led team meetings and directed next steps. I emphasized diverse perspectives and accountability.

Assembling the bike8

With aid from the machinists, my teammates and I assembled the bike. I put in extra time to troubleshoot drive chain issues.

Painting the bike9

After confirming the bike was working well, I prepped and spray painted it to fulfill the original vision.

Full Design Process Documentation Including 20+ CAD Drawings

This technical report details the goals, design ideation, testing, analysis, manufacturing, and all CAD drawings of the bike.

I guided my teammates throughout the manufacturing process using knowledge from my time as a Machine Shop Assistant. This expedited manufacturing and gave every member hands-on skills to excel. I took these photos as it was important to me that they could later share their accomplishments with others!

Manufacturing process photo 1
Manufacturing process photo 2
Manufacturing process photo 3

I was also responsible for the team name and costume design. I loved sharing this bike with my cousins after the Run Off!

Team Rocket costume photo 1
Team Rocket costume photo 2
Sharing the bike with cousins 1
Sharing the bike with cousins 2
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