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Tucked beneath the solar array of a small helicopter on Mars is a postage-stamp-size piece of muslin from a wing of the Wright Flyer, a nod to the first successful demonstration of powered flight 117 years ago.

About the size of a tissue box, Ingenuity stands on four carbon-composite landing legs, each 1.26 ft. Its four blades, arranged into two 4-ft.-long contrarotating rotors, are designed to spin at about 2,400 rpm to generate enough lift to fly in the thin Martian air.

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Credit: NASA/JPL-Caltech/MSSS