Solar Impulse 2 nearly home

Bertrand Piccard has taken off with Solar Impulse 2 (Si2) for the final leg of the first round-the-world solar flight.

Si2 is heading to Abu Dhabi where it should land after a flight of two days and two nights, depending on weather conditions.

Solar Impulse 2 is the first plane able to fly day and night without fuel – powered by the sun’s energy.

The 17,248 solar cells built into the wings power four batteries (38.5kWh per battery) that in turn power four electric engines (13.5kW each).

Si2 also has virtually unlimited autonomy – theoretically, Si2 could fly forever, and is only limited by the pilot’s ability.

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Solar Impulse 2 nearly home