Page last updated at 10:28 GMT, Thursday, 24 September 2009 11:28 UK

Test flight for solar-powered blimp


A group of French engineering students have built a solar-powered airship which they hope to fly across the English channel later this year.

The blimp called Nephelios recently had its first test flight.

Team member Arnaud Vaillant showed the BBC around the airship and explained how it works.

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