The Solar Impulse project is about to fly non-stop from Nanjing in China to Hawaii in the Central Pacific.
It takes 10 hours or so to fly 8,000 distance for a passenger airliner , But for this solar-powered, prop-driven, experimental aircraft, it could take 5-6 days and nights of continuous flight.
Andre Borschberg, The Swiss entrepreneur and engineer , who will be at the controls, has supreme confidence in the technology, but he is in no doubt how tough the coming mission will be.
“It’s more in the end about myself; it’s going to be an inner-voyage,” he told BBC News.
“It’s going to be a discovery about how I feel and how I sustain myself during these 5-6 days in the air.”
Borschberg will be strapped to his seat for the duration, confined in a cockpit no bigger than a phone booth.
He can take little catnaps of 20 minutes or so, and he will be practising yoga to try to keep his body fresh. He must be ready to react at very short notice.
Although it has a wingspan of over 70m, Solar Impulse only weighs a couple of tonnes, and dealing with any turbulence will require the attention of all his 40 years of flying experience.
Every step of the journey will be monitored from the project’s control room in Monaco.
Read more at BBC