Will the planes of the future be battery powered?
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Flying in an electric plane

A battery-powered plane that can fly for 30 minutes has taken to the skies at the Goodwood Festival of Speed.

The "eFusion" has been developed by German engineering firm Siemens, and can reach a top speed of 140mph (225km/h).

The BBC's transport correspondent Richard Westcott takes a closer look.

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