The SMUD California Solar Regatta is an annual collegiate competition that challenges teams to design and race solar-powered boats across endurance, slalom, and sprint events. As Lead Mechanical Designer, I was responsible for the mechanical systems design, CAD modeling, fabrication coordination, and integration between the mechanical and electrical subsystems.
Mechanical & Structural Design
The vessel is a solar-powered catamaran developed with an emphasis on mechanical robustness and precise system integration.
Designed the hull framework and drivetrain mounting system in SolidWorks, focusing on structural rigidity under dynamic water loads.
Modeled solar panel mounts and motor housings to balance accessibility, waterproofing, and optimal solar orientation.
Implemented finite element analysis (FEA) to verify stress points at the motor bracket and transom joints.
Contributed to buoyancy and weight distribution analysis, ensuring even trim and stability at full operating load.
Powertrain & Electrical Integration
Collaborated with the electrical team to integrate dual 24 V solar arrays, a high-efficiency brushless DC motor, and an MPPT charge controller.
Assisted in routing wiring harnesses and waterproof connectors between solar arrays, battery banks, and propulsion modules.
Designed a modular motor mounting plate allowing rapid testing of gear ratios and propeller configurations.
Supported data collection for power-to-thrust efficiency testing and run-time optimization.
Fabrication & Testing
Oversaw hands-on assembly of the frame and propulsion system using machined aluminum brackets, stainless hardware, and 3D-printed components for sensor mounts and cable management.
Coordinated prototype float testing to verify hull stability and propulsion alignment.
Iterated on rudder geometry and control linkage to improve turning radius and hydrodynamic efficiency.
Outcome & Skills Developed
This project demonstrates practical experience in system integration, mechanical design for marine environments, and collaborative engineering.
It combines CAD, FEA, rapid prototyping, and electrical-mechanical coordination bridging classroom theory with real-world engineering under competition constraints.
Authored by: Colby Vreman
Project: SMUD California Solar Regatta Catamaran
Status: Completed (Competition-ready design; solar thruster system successfully tested and raced)