A pioneering bid to fly a solar powered-plane through the night has been postponed because of a technical hitch.
The experimental aircraft was to have taken off from a military airbase in Switzerland this morning at the start of an historic 25 hour flight.
Despite the delay, one of the plane’s inventors, Bertrand Piccard, was philosophical.
“A project like this one is a quest for highlights but needs a very high tolerance to frustration and disappointment. And, basically, this is exactly the case this morning. We had to take the decision to postpone the take-off to another day,” he said.
The plane has the wingspan of a modern airliner.
The aim is to make the first-ever manned night flight on an aircraft powered only by solar energy.
The Solar Impulse project then hopes to make the first manned solar flight across the Atlantic and ultimately the first manned solar-powered flight around the globe.