Source: SFGate
“The Solar Impulse 2, a long-range experimental aircraft, crashed in the Gulf of Mexico when it lost power during an unmanned test flight on May 4, a report from the National Transportation Safety Board said. There were no fatalities or injuries. Developed by entrepreneur André Borschberg and Bertrand Piccard, a descendant of famous European explorers who pioneered scientific advancements both in the air and under the sea, the sun-powered plane has undertaken several successful test flights since it was developed in 2015. The solar-powered aircraft circumnavigated the world in 2015 and 2016.” (05/08/26)
https://www.sfgate.com/bayarea/article/experimental-aircraft-crash-us-22249431.php