Solar planes across the Pacific

Solar Impulse 2 solar plane took off on the Pacific flight at 2:39 am on May 30 (local time) from Nanjing Airport (China).

Solar battery aircraft across the Pacific

The flight lasts for six days and five nights (or at least for 130 hours) with an 8,175km flight from Nanjing City (China) to the Hawaiian Islands (US, Pacific).

Pilot André Borschberg undertakes the historic flight of Solar Impulse 2 from Nanjing (China) to Hawaii (USA) - Feature China / Barcroft Media

Swiss pilot André Borschberg (62) - who made this seventh flight - said it was "the longest and most dangerous flight " in his 12-flight journey in an attempt to set a flying record. Around the world with solar powered aircraft.

According to the British Guardian newspaper on May 31 , Solar Impulse 2 flew to an altitude of about 9,000m during the day to ' recharge ' it thanks to 17,248 solar panels installed in the body and wingspan of 72m long.

At night the plane lowered and glided at an altitude of about 1,000m. It only has a backup battery charger of 5-10% and the next morning it has to fly up again to catch the sun to recharge the energy.

'If a successful flight will prove to me and my colleague Bertrand Piccard from 16 years ago that people will change their minds and take a new perspective on the application of clean energy and renewable energy. André Borschberg told the media before the historic flight.

The first Solar Impulse version was released in 2009 and has a European flight in 2012.

Solar Impulse 2 takes off from Nanjing, China airport at 2:39 am 30-5 - (Photo: Feature China / Barcroft Media)

Diagram of 12 Solar Impulse 2 flights in conquest journey around the world - (Photo: National Geographic)