A pioneering solar-powered blimp designed by a group of French university students will undertake an English channel crossing in the first manned flight of its kind next month.
The Nephelios has two twin-bladed propellers and semi-flexible photovoltaic panels on top which collect solar energy that powers an electric motor. Its average speed is 25mph.
The eco-friendly aircraft is 72ft long and 18ft in diameter, makes little noise and is aimed at being an alternative to carbon-powered airships.
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