crimeandpunishment writes "If your plane is powered by the sun, it's tough to fly if your crew is in the dark. A 24-hour test flight for the world's first solar-powered round-the-world flight had to be postponed Thursday due to an equipment problem that would have left mission control out of touch with the technology on the experimental aircraft. When they're able to make this test flight, they hope by flying all day they'll be able to fully charge the batteries, then use the stored energy to power the plane all night."
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