Beijing: Solar Impulse (Si2), the solar plane on a mission to fly around the globe without a drop of fuel, is all set for a challenging 8,000-km journey on Tuesday, flying non-stop from Nanjing in China to Hawaii in the central Pacific, a media report said on Monday.

For Si2, which is powered by more than 17,000 solar cells installed on its 72-metre wings, it will be its greatest challenge yet, BBC reported, adding the experimental aircraft could take five-six days and nights of continuous flight to reach its destination.