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An experimental solar-powered plane took off from western Switzerland on Wednesday for a 24-hour test flight – a key step in a historic effort to one day circle the globe using only energy collected from the sun. The plane with its 262.5-foot (80-meter) wingspan left Payerne airfield shortly before 7 a.m. after overcoming an equipment problem [...] The X-51A Waverider flew today, and it flew fast. The scramjet engine in the experimental aircraft burned for a little over three minutes at around 10 a.m. PDT Wednesday in a test range over the Pacific Ocean, pushing the X-51A to the hypersonic speed of Mach 5, or five times the speed of sound. That was [...] |
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