The latest leg of the record breaking attempt to fly round-the-world by the solar powered plane, Solar Impulse 2, has been postponed. The team in Nanjing, eastern China, say the weather forecasters have assessed that conditions are no longer good for the attempted flight to Hawaii, stage 7 of a 12 leg journey. Pilot Andre Borschberg told the BBC’s John Sudworth that he was pleased not to be flying as the journey would have been too much of a risk.
The Solar Impulse project has already set a number of world records for solar-powered flight, including making a high-profile transit of the US in 2013.
Solar Impulse 2 has a wingspan of 72m, which is wider than a 747 jumbo jet, and yet it weighs only 2.3 tonnes. Its light weight is critical to its success as is the performance of the 17,000 solar cells that line the top of the wings, and the energy-dense lithium-ion batteries it uses to sustain night-time flying. http://www.bbc.co.uk/news