Glowing Helicopters on Mars - By Nancy_A
If the Ingenuity helicopter would fly at night on Mars, its very possible the whirring rotors would create enough static electricity in the extremely dry Martian atmosphere to cause the air around the craft to glow.
On Earth, this static discharge is usually just an annoyance. But on Mars, anything “rubbing” against the uber-dry atmosphere – and even the dry soil — can create a phenomenon called triboelectric charging. “The electric currents generated by the fast-rotating blades on drones are too small to be a threat to the craft or the Martian environment,” he said in a press release, “but they offer an opportunity to do some additional science to improve our understanding of an accumulation of …. triboelectric charging.”“Will the Mars Helicopter Induce Local Martian Atmospheric Breakdown?” was published in March 2021 in the Planetary Science Journal.
As the blades impact the grains, charge is transferred, building up on the blades and creating an electric field. As charge builds to high levels, the atmosphere starts to conduct electricity, a process known as “atmospheric breakdown,” creating a population of electrons that form an enhanced electric current that acts to dissipate or offset the charge build-up on the rotorcraft.
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