Thats the manned solar impulse which is due to take off again on another trial flight. Don't forget that the Zephyr will pass the two weeks in the air point later today, Friday the 23rd of July. It does not take a rocket scientist to work out that the man is probably the weak link in the Solar Impulse!!
No offence meant to a very skilled pilot no doubt, but when you here them saying things like engine up 3 RPM and down 3 RPM you realise an autopilot should be handling that sort of thing... http://www.solarimpulse.com/nightFlights/
You have to keep him alive and happy as well. I could'nt help looking at the sponsors watch and his flying helmet and thinking, crumbs theres some amount of payload just there!
Maybe I am just very jealous and would love to be flying that airframe, one thing the man does bring to the party is the ability to get the thing flown around the world and beat regulations for UAS.
Good luck to them, I bet there are spin-offs into the UAS world.
Now those that can really ought to raise a glass to our UAS team, the chaps from QinetiQ when the appointed hour comes and hope that it has a safe landing.