The Solar Impulse 2 landed in Cairo on Wednesday for its penultimate stop as the solar-powered plane nears the end of its marathon tour around the world.
After the two-day flight from Spain, just one final leg lies between it and its final destination, Abu Dhabi, where it started its odyssey in March last year.
The aircraft landed in Spain last month, after completing the first solo transatlantic flight powered only by sunlight.
After setting off from Seville on Monday morning, the plane passed through Algerian, Tunisian, Italian and Greek airspace, and flew over the Giza Pyramids before touching down at Cairo airport at around 7:10 am (0510 GMT).
Its support crew cheered as the plane, no heavier than a car but with the wingspan of a Boeing 747, landed, and trailed after it on bicycles.
It had finished the 3,745 kilometre (2,327 mile) journey with an average speed of 76.7 kilometres (47.7 miles) an hour, the flight organiser said.
“It was fantastic, everything worked well,” pilot Andre Borschberg told the control tower, as a live stream from the cockpit was broadcast on Solar Impulse 2’s Facebook page.
He emerged from the cockpit and hugged Bertrand Piccard, with whom he has taken turns flying the plane around the world.
Solar Impulse is being flown on its 35,400-kilometre (22,000 mile) trip in stages, with Piccard and his Swiss compatriot Borschberg alternating at the controls of the single-seat plane.
Picard, who had arrived early to greet the aircraft, told reporters that flying Solar Impulse 2 showed what new technologies can do.
– ‘Reality of today’ –
The 58-year-old had flown the plane across the Atlantic in a 6,765 kilometre (4,200 mile) journey.
It had completed its flight from New York to Seville in 71 hours, flying through the night with the energy stored in its 17,000 photovoltaic cells.
“It’s a new era for energy,” he said.
“I love to fly this plane because when you are in the air for several days you have the impression to be in a film of science fiction,” he said.
“You look at the sun, you look at your motors, they turn for days and for days, no fuel. And you think that’s a miracle. That’s magic. It is actually the reality of today. This is what we can do with these new technologies.”
He said the pilot takes 20 minute naps during the long flights, as the plane inches across the sky.
Borschberg had piloted the plane in its 8,924 kilometre (5,545 mile) flight from Japan to Hawaii in 118 hours, breaking the previous record for the longest uninterrupted journey in aviation history.
“It is comfortable. But of course you need to train for that,” Piccard said.
Borschberg and Piccard have said they want to raise awareness of renewable energy sources and technologies with their project.
Picard said the plane could fly continuously. “The pilot is the limit,” he told AFP.
“You capture the energy during the day, you use it in the engines and store it, and during the night you use the storage from the batteries, and you continue cycle after cycle,” he said.
Borschberg said a 20-day long flight could be on the cards.
“Will we be able to fly longer? I believe we will fly 20 days. But you have to be sustainable. You have to produce water. You have to produce oxygen,” he said.
Piccard does not expect solar powered commercial planes any time soon.
“But there will be passengers very soon in electric airplanes that we will charge on the ground.
“On the ground you can charge batteries and you can have short haul flights maybe 500 kilometres (310 miles) with 50 people flying in these planes” in a decade, he predicted.
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