Solar Plane on Cross-Country US Trip

A Swiss pilot has landed in Phoenix in the southwestern U.S. state of Arizona on the first leg of what is planned as the first cross-country flight of a completely solar-powered plane.

Adventurer Bertrand Piccard landed at about midnight in total darkness in the Solar Impulse, the first-ever manned plane that can fly by day or night using only solar power.

The flight from northern California took about 20 hours at an average speed of 49 kilometers per hour.

Piccard and a second pilot, …

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