Solar plane to make public debut

Swiss adventurer Bertrand Picard is set to unveil a prototype of the solar-powered plane he hopes eventually to fly around the world.

The initial version, spanning 61m but weighing just 1,500kg, will undergo trials to prove it can fly at night.

Mr Picard, who made history by circling the globe non-stop in a balloon in 1999, says he wants to demonstrate the potential of renewable energies.
It is probable that Picard will follow a route around the world in this aeroplane close to the path he took in the record-breaking Breitling Orbiter 3 balloon – going from the United Arab Emirates, to China, to Hawaii, across the southern US, southern Europe, and back to the UAE.

Although the vehicle is expected to be capable of flying non-stop around the globe, Picard will in fact make five long hops, sharing flying duties with project partner Andre Borschberg.

“The aeroplane could do it theoretically non-stop – but not the pilot,” said Picard.

“We should fly at roughly 25 knots and that would make it between 20 and 25 days to go around the world, which is too much for a pilot who has to steer the plane.

BBC