Sailing with Bernoulli
Albeit counterintuitive, sailboats have to stay close to the angle of the wind to get the most power and speed. It’s explained by Bournelli’s Principle in which air going over one surface of an object (the mast) is faster than the wind going over the other surface. Hence “lift” happens. So too with speech and singing, as told by newlyweds Mitchell and Molly Warmbein while sailing the York River. “When air is exhaled it’s forced into the vocal fields, or chords, creating sound from the negative pressure of the Bournelli effect,” Mitchell explained. It happens hundreds of times a minute, “thousands of times if you’re singing really high,” Molly chimed in. Suddenly the wind picked up, as if scientist Daniel Bournelli wanted us to get back to the task at hand.