Tacking not only uses a keel, it also uses the shape of a sail and Bernoulli's principle [0] to get the perpendicular and forward force. I'm not versed in sola

Tacking not only uses a keel, it also uses the shape of a sail and Bernoulli's principle [0] to get the perpendicular and forward force. I'm not versed in solar-particle-physics, but I doubt the Bernoulli's principle applies to solar particles. [0] https://en.wikipedia.org/wiki/Bernoulli%27s_principle https://en.wikipedia.org/wiki/Bernoulli%27s_principle