The aircraft took off at around 5:22 AM from Varanasi airport and is being flown by co-pilot as well as project President Bertrand Piccard.

The Solar Impulse-2 is currently flying the fourth leg. The Aircraft made a night stop in Varanasi for nearly 8 hours.

The CEO and pilot of Solar Impulse, Andre Borschberg, had flown the solar-powered aircraft to Varanasi from Ahmedabad.
    
The aircraft touched down at the Lal Bahadur Shastri International Airport at Babatpur on Wednesday shortly after 8:30 PM, completing an over 13 hour-long journey from Ahmedabad, where the plane and the crew had a week's stopover.

The aircraft maintained a minimum altitude of around 5,200 metres on its flight to Varanasi.

The plane reached Ahmedabad on March 10 and was stationed for six days there before arriving in Varanasi. The aircraft began its journey on March 9 from Abu Dhabi.

Swiss co-pilot Bertrand Piccard had flown the plane from Muscat to Ahmedabad whereas Borschberg had flown the aircraft to Varanasi from Ahmedabad.

Solar Impulse is claimed to be the first aircraft to fly day and night without a drop of fuel, propelled solely by the sun's energy. The single-seater aircraft, made of carbon fibre, has a 72 meter wingspan, larger than that of Boeing-747 and weighs only 2,300 kg.

The 17,248 solar cells on the wing recharge four lithium polymer batteries weighing 633 kg each, which allow the aircraft to fly at night.

The SI-2 from Mandalay in Myanmar is scheduled to reach Chongqing and Nanjing in China and thereafter to USA.

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