‘Impossible Flight’ reveals the turmoil and technology of a solar plane’s global trek

How the history-making flight of a solar-powered plane around the world nearly didn't make it.

From the outside, it looked as if the Swiss-led Solar Impulse project smoothly soldiered through adversity as its solar-powered plane made a record-setting trip around the world in 2015 and 2016.

But the perspective was different when seen from the inside: The multimillion-dollar campaign nearly came crashing down when teammates debated whether to go ahead with a crucial Pacific crossing, even though the monitoring system for the autopilot wasn’t working right.

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“The engineers were crying,” said Bertrand Piccard, the Swiss psychiatrist and adventurer who served as Solar Impulse’s co-founder, chairman and one of its pilots. “They were begging me to stop.”

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