The overcast sky and cold winds stirring up waves on Lake Riley didn't deter the sailors. One boat slid smoothly along a designated path on the Eden Prairie lake. Another hit a yellow buoy along the route. The next zoomed past.
They all gathered, despite the dreary weather on a recent Saturday, to compete in the Solar Boat Regatta, an annual race organized by the Minnesota Renewable Energy Society (MRES) to raise awareness about alternative energy and highlight careers in engineering for middle and high school students. The challenge is to build or adapt a boat to run on solar power, and the reward is that most Minnesotan of summer pastimes — getting out on the lake.
"By racing the solar-powered boats that they built, students experience the thrill of competition and the pride of accomplishment that comes with creating something useful and fun," said Doug Shoemaker, an MRES board member who retired from Xcel Energy.
The MRES has run the regatta for 26 years, with competition for student teams and adult teams from across the state. Before they launched on race day, they had to learn about solar electricity, wiring, motors, fluid dynamics, boat design, construction and team work.
Over time, the MRES has made a point of reaching out to more diverse contestants and girls, who are underrepresented in science, technology, engineering and math careers. This year's event included a Sudanese-American crew from a St. Paul church and an 18-member team of Somali students — 11 girls and seven boys — who drove two hours from Rochester STEM Academy.
"We wanted to include diverse teams as we were having almost similar people every year," said Mark Weber, MRES chairman.
Sagal Yusuf, a junior at Rochester STEM Academy, said solar power was "tricky" in the beginning. She didn't know much about boating or solar power, but her instructor Bryan Rossi encouraged the students.
"Thanks to Google and Mr. Bryan Rossi, we started enjoying it," Yusuf said.