Solar-powered plane set for pioneering night flight Thursday

June 29, 2010
The Solar Impulse aircraft, a pioneering Swiss bid to fly around the world on solar energy takes off in April 2010 from Payerne's air base, western Switzerland.

The prototype of a pioneering Swiss bid to fly around the world on solar energy aims to take to the skies on Thursday in the first attempt at a night flight fuelled by the sun, the team said.

The high-tech single-seater Solar Impulse aircraft, with the 63.40-metre (208-foot) wingspan of a large Airbus A340 airliner, plans to take advantage of clear summer weather to take off from Payerne airbase in western Switzerland, it said.

"The situation continues to look good and the likelihood of seeing the HB-SIA take off on July 1st and land back in the early morning July 2nd is increasingly probable," it said in a statement Tuesday.

Team members have said they need a 25-hour window of clear and calm summer weather to attempt the pioneering round-the-clock flight above Switzerland and eastern France.

Pilot Andre Borschberg plans to keep the aircraft at altitudes of up to 8,500 metres, storing some of the energy from in batteries during the daylight to fly through the night before landing after dawn on Friday.

Despite its huge wingspan, the only weighs about as much as a family-sized car, about 1,600 kilogrammes (3,500 pounds).

"We're not sure to make it at the first try, let's be clear about this," said president and founder Bertrand Piccard, the round-the-world balloonist.

The solar venture has grown in recent months, joined by former space shuttle astronaut Claude Nicollier and retired NASA chief test pilot Rogers Smith.

The prototype made its 10th under solar energy on Tuesday. It first hopped off a runway shortly after it was unveiled seven months ago.

Powered by four 10 horsepower electric motors -- each about as strong as the engine that took the Wright Brothers into the air more than 100 years ago -- Solar Impulse's take-off speed is just 35 kilometres per hour (22mph), with a cruising speed barely twice as fast.

The prototype is slightly smaller than the craft that is planned to fly around the world in 2013 to 2014.

Explore further: Swiss team unveil pioneering solar plane

Related Stories

Swiss team unveil pioneering solar plane

June 26, 2009

Round-the-world balloooning pioneer Bertrand Piccard unveiled his solar-powered aircraft in Switzerland on Friday, ready for another trend-setting circumnavigation of the globe powered solely by the sun.

Pioneering Swiss solar-powered plane rolled out

November 6, 2009

Solar Impulse, the Swiss bid to make the first solar-powered flight around the world, rolled out its prototype on Friday at an airbase near Zurich and powered up the engines.

Pioneering solar-powered plane makes airborne hop

December 3, 2009

The prototype of Solar Impulse, a pioneering Swiss bid to fly around the world on solar power, briefly took off for the first time on Thursday but under battery power, the organisers said.

Huge solar powered plane takes to the air (w/ Video)

April 1, 2010

(PhysOrg.com) -- A huge airplane using solar cells as its only power source is being tested in Switzerland. In its first successful test flight last December, the plane flew only 350 meters at a height of just one meter above ...

Recommended for you

Facebook ready to test giant drone for Internet service

July 30, 2015

Facebook says it will begin test flights later this year for a solar-powered drone with a wingspan as big as a Boeing 737, in the next stage of its campaign to deliver Internet connectivity to remote parts of the world.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.