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Andre Borschberg

Solar Impulse 2 has completed its historic round-the world trip, after the aircraft touched down in Abu Dhabi.

Pilot Bertrand Piccard conducted the final leg of the epic journey, steering the plane safely from the Egyptian capital Cairo to the UAE.

He has been taking turns at the controls with Swiss compatriot Andre Borschberg, with the mission aiming to promote renewable energy.

It brings to an end a voyage that began in Abu Dhabi on March 9, 2015.Solar Impulse lands in Phoenix

Arriving into Abu Dhabi, Bertrand Piccard said: “The future is clean. The future is you. The future is now. Let’s take it further.”

The 17-stage journey covered some 42,000km, taking in four continents, three seas and two oceans.

The longest leg, an 8,924km flight from Nagoya in Japan to Hawaii, US, lasted nearly 118 hours and saw Andre Borschberg break the absolute world record for longest (time duration) uninterrupted solo flight.

It was just one of 19 official aviation records set during the global adventure.

Bertrand Piccard and Andre Borschberg have been working on the Solar Impulse project for more than a decade.

They had hoped to complete the challenge in 2015 but progress was not quite swift enough to get the best of the weather in the Northern Hemisphere’s summer.

When battery damage was sustained on that epic five-day, five-night passage over the western Pacific in June/July 2015, the decision was taken to ground the effort for 10 months.

Solar Impulse is no heavier than a car, but has the wingspan of a Boeing 747. It is powered by 17,000 solar cells.

The solar-powered aircraft’s experimental design presents a number of technical difficulties, with the airplane being very sensitive to weather conditions.

Solar Impulse has landed in Phoenix, Arizona, after ending the first leg across the continental United States in its attempt to fly around the world.

It the zero-fuel aeroplane left Mountain View, California, at dawn on May 2 and landed 16 hours later in Goodyear, a suburb of Phoenix.

Solar Impulse was the 10th leg of its round the world quest.

Andre Borschberg was at the controls, having taken over from Bertrand Piccard.

Bertrand Piccard flew Solar Impulse to the West Coast of the US from Hawaii just over a week ago.Solar Impulse lands in Phoenix

The latest stint was relatively short – 1,113 kilometers.

Solar Impulse’s take-off from the famous Moffett Airfield occurred at 05:03 PDT on May 2 and the plane landed in Phoenix at 20:55 PDT.

The team has traversed America before, in 2013. That crossing was undertaken in the prototype predecessor to the current aircraft.

Bertrand Piccard and Andre Borschberg are aiming to get to New York by the start of June, to begin preparations for the big Atlantic crossing.

Solar Impulse started its circumnavigation of the globe in March of last year in Abu Dhabi.

The solar-powered plane flew over Oman, India, Myanmar and China before flying to Japan, from where it made a 5,545-mile passage to Hawaii.

That five-day and five-night journey set a record for the longest duration, non-stop, solo aeroplane flight.

It also resulted in damage to the plane’s batteries, forcing the team into some lengthy repairs.

Only when the days started stretching out again in the Northern Hemisphere could the team think about getting back in the air.

With 17,000 photovoltaic cells on its top surfaces, Solar Impulse gets all its energy from the sun.

Solar Impulse has landed in California after a three-day flight over the Pacific Ocean.

High winds delayed the solar-powered plane’s landing at Moffett Airfield, Mountain View, as pilot Bertrand Piccard flew in a holding pattern off the coast.

Solar Impulse left Hawaii on April 21, after eight months of repairs following battery damage on a flight from Japan.

This is the ninth leg of Solar Impulse’s attempt to fly round the world.

Solar Impulse started its journey last March in Abu Dhabi. The trip has involved two different pilots flying separate legs.

The plane gets all its energy from the sun, and has 17,000 photovoltaic cells on its top surfaces.

These power Solar Impulse’s propellers during the day but also charge batteries that the vehicle’s motors can then call on during the night.

The distance on this leg was 2,200 nautical miles.

Starting in Abu Dhabi, UAE, in March, Solar Impulse crossed Oman, India, Myanmar, and China.Solar Impulse 2 solo flight record

The plane then flew to Japan, before undertaking a 8,924km passage to Hawaii. That five-day, five-night crossing set a record for the longest ever non-stop solo plane journey.

However, Solar Impulse’s batteries overheated during the trip, forcing the project to stop on the Pacific archipelago while repairs were conducted.

A further 20 million euros ($23 million) had to be raised from supporters during the winter to keep the project going for another year.

Bertrand Piccard shares flying duties with his business partner, Andre Borschberg.

It was Andre Borschberg who flew into Kalaeloa in July 2015, and he will take the controls on the next leg across the US mainland.

Bertrand Piccard and Ande Borschberg’s intention is to reach New York by the start of June, to begin preparations for an Atlantic crossing.

Assuming this is completed successfully, it should then be a relatively straightforward run back to the “finish line” in Abu Dhabi.

Bertrand Piccard and Andre Borschberg have been working on the Solar Impulse project for more than a decade.

Solar Impulse 2 has been grounded until next year, the Swiss team trying to fly the solar-powered plane around the world has announced.

Solar Impulse’s batteries were damaged on the last leg of the journey from Japan to Hawaii and will take several months to repair.

The solar-powered plane will be kept at its Pacific stop-over at Kalaeloa airport while the maintenance is undertaken.

Once the work is done there will be some test flights before the global quest resumes in 2016, the team says.

That is likely to be in April, and would see Solar Impulse 2 fly from Hawaii to the West Coast of the US.

It should then have a sizeable weather window to try to cross America, the Atlantic, and make its way back to Abu Dhabi, UAE, where the circumnavigation began in March 2015.Solar Impulse 2 grounded

The suspension will be a disappointment but the project has already met a number of its key objectives.

Pilot Andre Borschberg smashed aviation records when he steered Solar Impulse 2 from Nagoya to Kalaeloa at the beginning of the month.

Flying just on the power of the Sun, Andre Borschberg completed the 7,200km in 118 hours.

Not only did this set several new marks for manned solar aeroplanes, but it surpassed with ease the absolute aviation record for the longest duration solo flight in an un-refueled vehicle.

However, in achieving this mammoth feat, Andre Borschberg’s plane experienced damaging overheating in its lithium-ion battery system. Although the battery units performed as expected, they had too much insulation around them, making temperature management very difficult.

Engineers on the project have not been able to make the quick repairs that might allow Solar Impulse 2 to have a crack at completing the round-the-world journey this year.

The University of Hawaii and the US Department of Transportation have agreed to continue to host Solar Impulse 2 in a large hangar at Kalaeloa airport while the maintenance proceeds.

Solar Impulse 2 has landed in Hawaii after making a historic 7,200km (4,470 miles) flight across the Pacific from Japan.

Pilot Andre Borschberg brought the sun-powered plane gently down on to the runway of Kalaeloa Airport at 05:55 local time.

The distance covered and the time spent in the air – 118 hours – are records for manned, solar-powered flight.

The duration is also an absolute record for a solo, un-refueled journey.

Andre Borschberg’s time betters that of the American adventurer Steve Fossett who spent 76 hours aloft in a single-seater jet in 2006.

He said he looked forward to having a shower and visiting one of the many steakhouses suggested to him on the way into Hawaii’s O’ahu island.

Meeting Andre Borschberg in Kalaeloa was his partner on the Solar Impulse project, Bertrand Piccard.Solar Impulse 2 Pacific crossing

Bertrand Piccard and Andre Borschberg are sharing flying duties in their quest to circumnavigate the globe – an effort they began in Abu Dhabi, UAE, back in March.

It is Bertrand Piccard who will now fly the next leg from Hawaii to Phoenix, Arizona.

That will not be quite as far as the leg just completed, but it will still likely take four days and nights.

From Phoenix, Solar Impulse 2 will head for New York and an Atlantic crossing that would eventually see the plane return to Abu Dhabi.

First, the Solar Impulse ground crew in Kalaeloa will need a few days to check over the aircraft.

During this servicing, meteorologists will once again take on the tricky task of finding a suitable flight window.

Getting Solar Impulse 2 to Hawaii proved more problematic than anyone could have imagined.

The project was stuck in Nanjing, China, for five weeks before the first attempt to cross the ocean was made.

Solar Impulse 2’s slow speed, light weight and 72m wingspan put significant constraints on the type of weather the vehicle can handle, and that first sortie was aborted after just one day in the air because of a fast developing cold front ahead of it.

Andre Borschberg diverted to Nagoya, and then had to wait a further month before being given the green light on Monday to again take off for Kalaeloa.

Even so, he has had to cross two weather fronts this week and has endured some uncomfortable turbulence as a consequence.

The Swiss team is using the various stopovers on its round-the-world journey to carry a campaigning message to local people on the topic of clean technologies.

The Solar Impulse 2 plane is not really intended to be a vision of the future of aviation. Rather, it is supposed to be a demonstration of the current capabilities of solar power in general.

The vehicle is covered in 17,000 photovoltaic cells. These either power the vehicle’s electric motors directly, or charge its lithium-ion batteries, which sustain the plane during the night hours.

Solar Impulse 2 has broken the record for the longest non-stop solo flight without refueling.

The solar-powered plane spent 76 hours into the latest leg of its attempt to circumnavigate the globe.

Pilot Andre Borschberg is making steady progress as he attempts the first solar-powered crossing of the Pacific.

After leaving Nagoya, Japan, early on June 29, Andre Borschberg has now passed Midway Island and is heading towards his destination of Kalaeloa, Hawaii.

At 76 hours into the journey, Andre Borschberg broke the record for the longest ever non-stop solo flight without refueling.

The previous mark was set by the American Steve Fossett in 2006.

Steve Fossett’s jet-powered Virgin GlobalFlyer vehicle completed a full circumnavigation of the world in that time, travelling more than 41,000km.

In contrast, Andre Borschberg’s Solar Impulse plane, which carries no fuel at all, had gone “only” some 5,500km in its 76 hours of flight.

On July 1, the Swiss pilot fly a holding pattern to time his encounter with an upcoming cold front to the optimum.

This will occur on July 2, and Andre Borschberg needs good sun conditions to get his aircraft up and over the weather system so that he can navigate the final stretch into Kalaeloa on July 3.

Precisely when this historic landing will occur is somewhat uncertain.Solar Impulse 2 solo flight record

Solar Impulse has some quite strict constraints to ensure the 72m-wingspan vehicle can put its wheels down safely.

These include a maximum cross wind of no more than four knots and a maximum overall wind speed of no more than 10 knots.

If it is too windy at ground level, Andre Borschberg will be instructed to circle overhead until the conditions calm down.

By then, Andre Borschberg will probably have spent more than 120 hours in the air.

So far, the pilot has coped remarkably well on very little sleep, and on July 1 even made time to joke around in his cockpit by donning a wig and fake beard.

When Andre Borschberg gets to Hawaii, he will be met by fellow adventurer and business partner, Bertrand Piccard.

Andre Borschberg and Bertrand Piccard have shared the flying duties in the single-seater plane’s round-the-world quest, which began in Abu Dhabi, UEA, back in March.

It is Bertrand Piccard – who famously made the first non-stop global circumnavigation in a balloon – who will fly the next leg from Kalaeloa to Phoenix, Arizona.

That is not quite as far as the current stint, but it still likely to take four days and nights.

From Phoenix, Solar Impulse 2 will head for New York and an Atlantic crossing that would eventually see the plane return to Abu Dhabi.

Andre Borschberg and Bertrand Piccard have used the various stopovers on their round-the-world journey to carry a campaigning message on the topic of clean technologies to local populations.

Their Solar Impulse plane is not intended as a demonstration of the future of aviation. Rather, it is to supposed to show off the capabilities of solar power in general.

Solar Impulse 2 is covered in 17,000 photovoltaic cells across its wings. These either power the vehicle’s electric motors directly, or charge its lithium-ion batteries, which sustain the plane during the night hours.

Solar Impulse 2 is making its second bid at a record-breaking flight across the Pacific Ocean.

The solar-powered plane took off from Nagoya Airfield in Japan at 18:03 GMT on June 28 and is scheduled to land in Hawaii in approximately 120 hours.

Solar Impulse 2 said on its website that pilot Andre Borschberg had passed the point of no return.

The team has spent nearly two months waiting for a clear weather window to cross the Pacific.

“Andre Borschberg has passed the point of no return and must now see this 5 days 5 nights flight through to the end,” the Solar Impulse team said on its website.

Andre Borschberg now no longer has the option to turn around and return to Japan, if the weather forecast changes.

The first attempt to fly over the Pacific Ocean was cut short after a change in the forecast forced an unscheduled landing.

Another attempt to take off on June 23 was cancelled at the last moment because of concerns about the conditions.

This time, the team will not be widely publicizing the take-off until the plane is several hours into its flight, as it may need to turn back if the forecast changes.

However, if the pilot succeeds, it will be the longest-duration solo flight in aviation history, as well as the furthest distance flown by a craft that is powered only by the Sun.

The Pacific crossing is the eighth leg of Solar Impulse’s journey around the world.

But this stage has proven to be the most difficult, and has been hit by weeks of delays.Solar Impulse 2 makes second Pacific crossing bid

Swiss pilot and Solar Impulse co-founder Andre Borschberg, who is flying the experimental single-seater craft, was initially supposed to begin his journey to Hawaii from Nanjing in China.

He spent weeks there, with his ground-support team, waiting for the right flying conditions to present themselves.

Andre Borschberg finally took off on May 31, but a deterioration in the forecast a few hours into the mission meant that he had to divert to Japan.

The rainy season in Nagoya has meant another long wait there – but after the false start last week, meteorologists are now confident they have found a weather window to make the five-day, five-night crossing to Hawaii.

A spokesperson said that the plane would be heading straight out across the Pacific.

The experimental craft – which has 17,000 solar cells – is powered only by the Sun.

Once over the ocean, if it fails to soak up enough rays to fully charge its batteries and make it through the night, the pilot could be forced to bail out.

Andre Borschberg has been trained for that eventuality.

He has a dinghy and enough supplies for several days while he waits for the team to identify a vessel to go pick him up.

But, of course, the team hopes none of this will be necessary.

Andre Borschberg’s will spend the duration of the flight strapped into his seat in a cockpit that is about the same size as a telephone booth.

He will only be allowed to take 20-minute cat-naps, but says he will use yoga and meditation to make his journey more comfortable.

If this flight succeeds, the plane will continue its journey around the world, with Bertrand Piccard taking the controls for the next Pacific crossing from Hawaii to the US mainland.

Solar Impulse 2 will then continue across North America, before attempting to fly over the Atlantic.

However, the build-up of delays could impact on the later stages. Ideally, the plane needs to cross the Atlantic before August, when the hurricane season reaches its peak.

Solar Impulse 2 has made a forced landing in Nagoya, Japan, aborting a Pacific crossing due to deteriorating weather ahead of it.

Solar Impulse is the only airplane of perpetual endurance, able to fly day and night on solar power, without a drop of fuel.

The aircraft, which set off from China on May 31, had hoped to reach Hawaii by the end of the week.

However, a developing cold front over the ocean is blocking its path and pilot Andre Borschberg has decided to play safe by putting down in Nagoya.

Andre Borschberg will now wait in Japan for a new weather opportunity to present itself.

Solar Impulse 2 is attempting to make the first circumnavigation of the globe by an airplane powered only by the sun.Solar Impulse 2 forced landing Nagoya

The 17,000 photovoltaic cells on its wings drive propellers during the day but also charge batteries that sustain flight during the night.

The China-Hawaii stint was to be the seventh leg in the quest that began back in March from Abu Dhabi, UAE.

Andre Borschberg brought Solar Impulse into Nagoya airfield at 23:49 local time. A line of brilliant LEDs on the front edge of the plane’s wings announced his approach to the runway.

Because Japan was never a scheduled stop, the project has had to scramble to get its ground crew and equipment to the airport to meet the vehicle.

This saw the Swiss adventurer having to circle above Nagoya while preparations were made beneath him.

Solar Impulse 2 will now be tied down and protected from the elements in a mobile hanger while meteorologists and flight strategists look for a new possibility to cross the Pacific.

Flying the more than 8,000km from Nanjing in China to Kalaeloa in Hawaii was always considered the big test in the round-the-world flight.

Although disappointed at having being forced to make a stopover, the team is nonetheless delighted with the performance of its aircraft.

Just the journey from Nanjing has covered more than 2,850km – a new distance world record for a manned solar-powered plane. The time in the air, also, 44 hours, is a record in the same aviation class.

In completing a full day-night cycle on Sunday into Monday, Solar Impulse has proven its credentials as an “eternal plane”. That is, given the right weather conditions, Solar Impulse has the ability to stay aloft indefinitely.

Quite when the airplane will now get to go to Hawaii is anyone’s guess at the moment. It is unlikely to get a chance before next week. Andre Borschberg will need some time to rest, as will his ground crew.

Ideally, the team needs to cross America, and then the Atlantic, before the hurricane season starts to peak in August.

Solar Impulse 2 has taken off in its sixth flight from Chongqing in western-central China to Nanjing in the east.

The zero-fuel airplane started to fly around the world in Abu Dhabi, UAE on March 9.

Solar Impulse 2 was only supposed to stay a few hours in Chongqing after arriving from Myanmar (Burma), but poor weather grounded the plane for three weeks.

The team is now confident conditions will remain fair for the Nanjing leg.

Getting to eastern China would set up the project for its greatest challenge yet – a five-day, five-night crossing to Hawaii.

The latest leg saw Solar Impulse 2 leave the runway at Chongqing International Airport at just after 06:00 local time, on April 21. Project chairman, Bertrand Piccard, is again at the controls of the single-seater aircraft.Solar Impulse 2 Chongqing flight

Bertrand Piccard is taking it in turns with CEO Andre Borschberg. But as the engineer in the partnership, Andre Borschberg wants to do the Hawaii leg, so Bertrand Piccard has elected to do both Chinese stages. He brought the plane in from Mandalay, Myanmar, to Chongqing, and is now flying the 1,200km to Nanjing as well. It should take him about 17 hours.

Once in Nanjing, the team will stay put for at least 10 days, carefully checking over the aircraft and running through a training program ahead of the first Pacific leg.

“I think 10 days is the time we need to get ready. Then we need to wait for a good weather window,” explained mission director Raymond Clerc.

“That could be three days; we could have to wait three weeks – because this leg is really the most important and is very complex. To go towards Hawaii could last five days and five nights.”

Nanjing is about 125 miles from the coast, very close to Shanghai. The first Pacific leg would cover a distance of more than 4,950 miles.

Solar Impulse 2 is in the air again, crossing India and hoping to make it to Myanmar on March 19.

The solar-powered plane attempting to fly around the world, with Andre Borschberg at the controls, took off from Ahmedabad at 07:18 local time.

Solar Impulse 2 is heading to Varanasi in India’s Uttar Pradesh region, where it will make a short “pit stop” before pushing on over the Bay of Bengal.

The leg to Mandalay in Myanmar (Burma) will be flown by Bertrand Piccard.

The two pilots are taking it in turns to guide Solar Impulse 2 on its circumnavigation of the globe.

So far, they have covered about 2,000km in two segments since beginning the adventure in Abu Dhabi.

It will likely be another five months before they return to the United Arab Emirates, having crossed both the Pacific and Atlantic oceans in the process.

Today’s take-off was delayed by almost two hours because of customs issues.Solar Impulse 2 heads to India

The roughly 1,100km from Ahmedabad to Varanasi is the third leg of the mission and should take Borschberg about 15 hours to complete.

The team will then lay over for a few hours before taking off for Mandalay.

This fourth leg is longer – about 1,500km – and has some tricky conditions to negotiate.

“In Varanasi, we can expect to have foggy mornings, which could be a problem for an early take-off,” explained Christophe Beesau, who works on flight strategy.

“And for leg four, of course, we will cross the Bay of Bengal. This may be challenging because we have often at altitude an important wind, and, on the other hand, due to air traffic control restrictions, we have to keep the track.

“We know that we will have to adjust carefully the flight profile to avoid this problem.”

About two hours before landing in Mandalay, Solar Impulse 2 will have to fly over a big range of mountains up to 3,000m in height.

It will aim to get this done before sunset so that it can then gently descend towards the Myanmar city in the dark.

The Solar Impulse project has already set plenty of world records, including the greatest distance covered in a single solar-powered flight.

This was the 1,468km attained on leg two from Muscat in Oman to Ahmedabad.

The wingspan of the vehicle is 72m, which exceeds that of a 747 jumbo jet airliner. It does, however, only weigh 2.3 tonnes.

Its light weight will be critical to its success over the coming months.

The Pacific and Atlantic crossings will require Solar Impulse 2 to fly non-stop for several days at a time.

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Solar-powered plane Solar Impulse-2 has began its round the world flight after taking off from Abu Dhabi, heading east to Muscat in Oman.

Over the next five months, Solar Impulse 2 will skip from continent to continent, crossing both the Pacific and Atlantic oceans in the process.

Andre Borschberg was at the controls of the single-seater vehicle as it took off at 07:12 local time.Solar Impulse 2 Abu Dhabi take off

He will share the pilot duties in due course with fellow Swiss, Bertrand Piccard.

The plan is stop off at various locations around the globe, to rest and to carry out maintenance, and also to spread a campaigning message about clean technologies.

Today’s leg to Oman will cover about 400km and take an estimated 12 hours.

Details of the journey are being relayed on Solar Impulse website.

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Solar Impulse 2’s 35,000km journey around the world is set to get under way on Monday, March 9.

The solar-powered plane will take off from Abu Dhabi and head east, first to Oman, and then to India.

Over the next five months, Solar Impulse 2 will skip from continent to continent, crossing both the Pacific and Atlantic oceans in the process.

Swiss adventurers Bertrand Piccard and Andre Borschberg will share the pilot duties in the single-seater vehicle.

They will stop off at various locations to rest and to carry out maintenance, and also to spread a campaigning message about clean technologies.

Andre Borschberg will start the journey with a takeoff from the Emirate’s international airport at about 06:30 local time.

The project has already set a number of world records for solar-powered flight, including making a high-profile transit of the US in 2013.

The round-the-world venture is altogether more dramatic and daunting, and has required the construction of an even bigger plane than the prototype, Solar Impulse-1.Solar Impulse 2 round the world journey 2015

This new model has a wingspan of 72m, which is wider than a 747 jumbo jet. And yet, it weighs only 2.3 tonnes.

Its light weight will be critical to its success.

Solar Impulse 2 has 17,000 solar cells that line the top of the wings, and the energy-dense lithium-ion batteries will use to sustain night-time flying.

Operating through darkness will be particularly important when the men have to cross the Pacific and the Atlantic.

The slow speed of their prop-driven plane means these legs will take several days and nights of non-stop flying to complete.

Bertrand Piccard and Andre Borschberg – whoever is at the controls – will have to stay alert for nearly all of the time they are airborne.

They will be permitted only catnaps of up to 20 minutes – in the same way a single-handed, round-the-world yachtsman would catch small periods of sleep.

They will also have to endure the physical discomfort of being confined in a cockpit that measures just 3.8 cubic meters in volume – not a lot bigger than a public telephone box.

Flight simulators have helped the pilots to prepare, and each man has developed his own regimen to cope.

Andre Borschberg will use yoga to try to stay fresh. Bertrand Piccard is using self-hypnosis techniques.

The support team is well drilled. While the mission will be run out of a control room in Monaco, a group of engineers will follow the plane around the globe. They have a mobile hangar to house the plane when it is not in the air.

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The Solar Impulse 2 plane has made its inaugural flight.

The solar-powered plane will be taken on a round-the-world journey in 2015.

The Solar Impulse 2 vehicle lifted off from Payerne airfield in Switzerland at just after 03:35 GMT, returning two hours later.

It is a larger, upgraded version of the aircraft that flew across America last year with adventurers Bertrand Piccard and Andre Borschberg at the controls.

For this maiden flight, test pilot Markus Scherdel was in the cockpit.

He climbed to just under 6,000ft, conducting a number of maneuvers to prove the handling of the aircraft.

The Solar Impulse 2 vehicle lifted off from Payerne airfield in Switzerland at just after 03.35 GMT, returning two hours later

The Solar Impulse 2 vehicle lifted off from Payerne airfield in Switzerland at just after 03.35 GMT, returning two hours later (photo Reuters)

Markus Scherdel reported some early vibrations, but overall the mission outcome appeared very positive.

“The initial results are in line with calculations and simulations,” read a later statement from the team.

Further flights will be conducted in the coming months in order for the experimental machine to attain certification.

The carbon-fiber aircraft has a huge wingspan, which at 72m is wider than a Boeing 747 jet. And yet, the vehicle weighs only 2.3 tonnes.

The tops of the wings are covered by 17,000 solar cells, which drive four brushless electric motors at speeds of up to 90mph.

During the day, the solar cells will recharge lithium batteries, which can then be used to keep the plane’s propellers turning through the night.

The first Solar Impulse plane set a number of world records, including the longest manned solar-powered flight at 26 hours, the first inter-continental flight in a solar-powered plane, and the greatest distance covered on a piloted solar-powered flight. (Autonomous solar-powered drones can stay aloft for weeks).

That last record was set during Bertrand Piccard’s and Andre Borschberg’s epic TransAmerica journey in May, June and July last year.

But as challenging as that effort was, it will be dwarfed by the difficulty and complexity of completing a global flight.

This is because it will have to include passage across the Atlantic and Pacific Oceans. The latter could take all of five days and nights to complete.

Only one pilot can fit in the cockpit. It has a reclining seat to make room for exercising and to permit Bertrand Piccard and Andre Borschberg, whoever is at the controls, to take short catnaps.

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