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2016-07-25. Round-the-world flight completed by solar aircraft.

posted Jul 26, 2016, 11:29 AM by Alan Gould
By Associated Press. For GSS Energy Use chapter 9. Excerpt: ABU DHABI, United Arab Emirates — The world’s first round-the-world flight to be powered solely by the sun’s energy made history Tuesday as it landed in Abu Dhabi, where it first took off on an epic 25,000-mile journey that began more than a year ago. Since its March 2015 takeoff, the Swiss-engineered Solar Impulse 2 has made 16 stops across the world — including at Moffett Field in Mountain View — without using a drop of fuel to demonstrate that using the plane’s clean technologies can reduce the world’s energy consumption, save natural resources and improve quality of life. ...The aircraft is powered by 17,248 solar cells that transfer energy to four electrical motors that power the plane’s propellers. It runs on four lithium polymer batteries at night. The plane’s wingspan stretches 236 feet to catch the sun’s energy. At around 5,070 pounds, the plane weighs about as much as a minivan or midsize truck. An empty Boeing 747, in comparison, weighs 400,000 pounds...  http://www.sfgate.com/world/article/Round-the-world-flight-completed-by-solar-aircraft-8415944.php