Before the invention of engines, ships have for centuries relied on the power of the wind on their sails to move around the seas of the world. From the Phoenicians merchants of the ancient world to the English and Dutch traders of the 19th century, it has always been wind power which has kept marine commerce alive across the sea lanes of the world.
And now, with oil prices skyrocketing and global warming becoming a concern for all countries, probably it is time once more to take a look at the possibilities of harnessing clean wind power for moving across the oceans.
Which is what the SkySail is all about. Invented by a company in Hamburg, it is a massive kite tethered to a ship that produces enough motive power to save 35% in fuel costs. A retractable mast slowly hoists the kite in the sky, where the wind unfolds it, and an autopilot keeps it in the correct position. It produces four times more energy than a regular sail, and if the winds are favourable the ship can use it to relieve its main engines.
Check out their website for more information and a short video.