Primo Wind’s first model, a microwind turbine, was designed to mimic the design of a sailboat’s jib and main sail. The two parts of the sail accelerate the wind flowing through the middle. Photo courtesy of Primo Wind Inc.

Primo Wind’s first model, a microwind turbine, was designed to mimic the design of a sailboat’s jib and main sail. The two parts of the sail accelerate the wind flowing through the middle. Photo courtesy of Primo Wind Inc.

— As a longtime sailor, surfer, and engineer, Ned McMahon knows how to harness the wind...

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