Solar Cars Harness Wind with New Fins in Australian Race

Innovation in the World Solar Challenge

• ☀️ The Bridgestone World Solar Challenge is a nearly 2,000-mile race across Australia showcasing engineering innovation and sustainable solutions.
• ❄️ This year, the race is held in winter, with an estimated 20% less sun, prompting teams to innovate.

Harnessing the Wind with High-Tech Fins

• 🌬️ Several teams have introduced high-tech fins to their ultra-light aerodynamic designs to utilize wind power.
• 💡 These fins are designed to harness crosswinds, acting as a vertical airfoil that draws out forward thrust like a sail and stabilizes the vehicle in crosswinds, similar to a rudder.
• 🤖 The University of Michigan's car, Millennium, features a retractable fin that enhances aerodynamics and increases speed while stabilizing the car in outback winds.
• ⚙️ This fin system is fully robotic and can be controlled from a chase vehicle.

"Battle of the Fins" and Drag Reduction

• 🏆 The "battle of the fins" is a key theme this year, with multiple top teams employing fin systems.
• 📉 The Brenell Solar team's car, Nuna 13, uses movable fins that have been shown to significantly reduce drag, allowing for better battery energy conservation in crosswind conditions.

Advanced Solar Technology and Future Applications

• ⚡ Team Michigan is also using a solar array balancer, a partnership with Opivva, which can deliver 25 times more power than a standard array in shade.
• 🚗 Experts predict that technologies developed in this race will be integrated into mainstream road vehicles in the near future.