How to design a sailing ship for the 21st century?
Make it <i>big</i>, get it up out of the water.<p>The larger your ship is the more efficient it can be, and the less of it in the water the less energy is needed to push it.<p>So make big <i>big</i> ships with really really big sails.  You want the ships to fly with just the keel in the water to steer against the wind.<p>You might think I&#x27;m joking or talking nonsense, but look up Alexander Bell&#x27;s cellular geodesic kites, and Bucky Fuller&#x27;s &quot;Cloud Nine&quot; floating city.