Scientists isolate the sound of Ingenuity's helicopter blades spinning at more than 2,500 revolutions per minute on Mars.
First came the amazing pictures, then the video. Now NASA is sharing the sound of its little helicopter humming through the thin Martian air.It arrived on Mars on February 18NASA's Jet Propulsion Laboratory in California released the first audio on Friday, just before Ingenuity made its fifth test flight, a short one-way trip to a new airfield.
During the fourth flight a week earlier, the low hum from the helicopter blades spinning at more than 2,500 revolutions per minute was barely audible.That happened because the 1.8-kilogram helicopter was more than 80 metres from the microphone on the Perseverance rover. The rumbling wind gusts also obscured the chopper's sound.Ingenuity — the first powered aircraft to fly on another planet —
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