After a two month European mission the HB-SIA solar aircraft, piloted by André Borschberg, is back on Swiss soil (well airspace actually) – we couldn't resist showing you this symbolic image!

I just spoke to André, who told me all about his flight so far, but i'll get to that in just a moment. First let me tell you that Solar Impulse HB-SIA crossed the border into Switzerland at 14:57 (local time) after 7 hours and 46 minutes flight time. André Borschberg will buzz the Solar Impulse base at Payerne airfield next, but then will have to circle while he waits for the air to cool down so that he can land; it is quite warm at the moment and heat is not ideal for the aircraft as rising hot air pockets can throw the solar aircraft off balance. The only solution is to wait until the sun sets and the temperature drops.

Niklaus Gerber, the coordinator between Solar Impulse and air traffic control, told me that the beginning of the flight was very relaxed from an air traffic point of view as it is relatively quiet on a Sunday, particularly early in the morning. The arrival in Switzerland, on the other hand, will be a bit busier as air space is limited and becomes congested in the Geneva-Cointrin area. Having said that, there has been close collaboration with air traffic control and HB-SIA's flight path has been planned accordingly.

I just spoke to André, who told me all about his flight so far, but i'll get to that in just a moment. First let me tell you that Solar Impulse HB-SIA crossed the border into Switzerland at 14:57 (local time) after 7 hours and 46 minutes flight time. André Borschberg will buzz the Solar Impulse base at Payerne airfield ...



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