120-hour flight across the Pacific Ocean,a new Record

    A solar-powered plane able to fly in sunshine or darkness without using any fuel on a planned 120-hour flight across the Pacific Ocean, from Nagoya, Japan, to Kalaeola, Hawaii.

     The flight, which is expected to take five days and five nights, is part of an ambitious attempt to circumnavigate the world using only solar power.

   "This flight will be demanding and challenging particularly given its duration and the fact that no immediate landing is possible and will be a feat never accomplished before in the world of aviation," Solar Impulse officials said in a statement.

    The round-the-world attempt began March 9 in Abu Dhabi, in the United Arab Emirates.  Last week, after spending weeks in Japan, the plane was grounded due to poor weather conditions. But today's attempt went off without a hitch, Solar Impulse officials said, marking the start of the mission's longest leg.

     Bertrand Piccard, the chairman and founder of Solar Impulse and its other pilot, will support Borschberg from the Mission Control Centre in Monaco.He uses self-hypnosis to keep focused during long flights. Piccard is expected to pilot the solar plane on the next leg of its journey, from Hawaii to Arizona.

      The Solar Impulse 2 is powered by 17,000 photovoltaic cells on its wings, which drive propellers during the day and charge batteries that power the aircraft at night. After arriving in Hawaii, the plane will continue to Phoenix, with a stop planned in the middle of the U.S., before the pilots head to New York City. Following these stops in the U.S., the plane will fly to Europe, and eventually will return to Abu Dhabi to complete their round-the-world expedition. There will be 13 flights in total, if all continues as planned, according to Solar Impulse officials.