But as a species we wouldn’t have made it very far if it was only possible to sail in the same direction the wind is blowing. There are a number of methods for sailing upwind, but generally only ...

Richard A. Proctor, on charts for great circle sailing, which is a very interesting development of the law of least force. The chart brought forward by Prof. Proctor is a stereographic projection ...

It’s a machine that can move with the wind at a speed faster than the wind itself. A fundamental law of sailing boats is that when they are sailing with the wind, i.e. in the same direction as ...