PHOTOS : World Biggest Solar-Powered Aircraft Completes Flight Test In Hawaii.

World’s biggest solar-powered ‎plane‬ completes test flight in Hawaii after installing a battery cooling system. After seven months, Solar Impulse 2 has returned to the sky as it prepares to resume its record-setting round-the-world flight...


The huge, sun-powered plane, which smashed the longest solo record last summer from Japan to Hawaii, took off from Oahu's Kalaeloa Airport on Friday for an approximately 90-minute maintenance flight, according to reports.

The plane's wingspan is greater than a Boeing 747's, but it flies only about as fast as a car and weighs only about as much as a large SUV.