German ship fights climate change with high-tech kite

By Erik Kirschbaum

HAMBURG, Germany (Reuters) - Turning ocean winds into gold while cutting greenhouse emissions in the process might sound like some sort of alchemy for the 21st century.

But unlike futile earlier efforts to convert ordinary metals to gold, two fast-growing German companies have worked together developing a high-tech kite system to pull enormous ships across the oceans -- and save enormous amounts of money.

The 132 meter (433 ft) long MV "Beluga SkySails" will make its maiden voyage in January across the Atlantic to Venezuela, up to Boston and back to Europe. It will be pulled by a giant computer-guided 500,000-euro ($725,000) kite tethered to a 15-metre high mast.

It is a throwback to an earlier maritime age, harnessing the winds that fell out of favor over a century ago when sailing lost the battle for merchant shipping to modern steam power because it was seen then as primitive and unpredictable.

But now, in the age of climate change, wind power is making a remarkable comeback thanks to modern technology.

"This is the start of a revolution for the way ships are powered," Beluga chief executive Niels Stolberg said in an interview with Reuters on the windswept deck of his new ship MV Beluga SkySails. "It's a small but crucial step for the future."

To latch onto the powerful winds prevailing well above the surface, the kite attached to the high-tech steerage unit flies up to 300 meters high to tug the 10,000-tonne ship forward, supporting its diesel engines and cutting fuel consumption.

Under favorable wind conditions, the 160-square meter kite shaped like a paraglider is expected to reduce fuel costs by up to 20 percent or more ($1,600 per day) and cut, by a similarly significant amount, its carbon dioxide emissions.