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New solar plane unveiled in Switzerland

PAYERNE, Switzerland--The masterminds of sun-powered plane Solar Impulse formally unveiled their new aircraft Wednesday, a year ahead of their planned round-the-world flight.

Solar Impulse 2 is the successor of the original plane of the same name, which last year completed a trip across the United States without using a drop of fuel.

“These two airplanes are the most energy efficient airplanes ever designed,” pilot Andre Borschberg told a 500-strong audience of officials, sponsors and diplomats at Switzerland's Payerne airbase.

“The first plane was a prototype, a flying laboratory,” said the former Swiss Air Force jet pilot.

Solar Impulse 2 is a bigger, better version of its predecessor, he said, reeling off the new aircraft's statistics.

The new plane has a wingspan of 72 meters.

While that is the same as an Airbus A380, at just 2,300 kilos, Solar Impulse 2 is less than 1 percent than the weight of the super jumbo jet.

That is thanks to the fact that the plane is built from carbon layers that weigh less than 25 grams per square meter — one third of the weight of a sheet of paper, Borschberg said.

It will be powered by a massive 17,248 solar cells spread across its wings and fuselage.

The goal, Borschberg said, is to be able to fly for at least 120 hours non-stop around the globe.

After test flights in Switzerland starting from next month, the plan is to take off sometime after March 1, 2015 from a location in the Gulf, ideal for its weather conditions, and head eastwards.

“We will need at least five days and five nights to fly from China to the U.S. and from the U.S. back to Europe,” said Borschberg.

While that cannot compete with traditional air travel, the point of the project is to push the boundaries of green-flavored research, said fellow pilot Bertrand Piccard, the latest member of a dynasty of Swiss scientists-cum-adventurers.

Dumbo

“If you say you want to fly around the world in a solar airplane, everyone thinks you're crazy,” said Piccard, who in 1999 was the first person to fly around the world non-stop in a hot-air balloon.

“But technology doesn't come out of the blue,” he added, noting that spin-offs from such projects are crucial for sectors from energy to auto manufacturing, and bio-science to chemicals.

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Visitors walk under the new experimental aircraft “Solar Impulse 2” during the official presentation at the airbase in Payerne, Switzerland on Wednesday, April 9.

(AP)

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