How does a helicopter fly without an atmosphere? (0.087 psi). That is essentially a vacuum.
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The lower gravity of Mars (about a third of Earth’s) only partially offsets the thinness of the 95% carbon dioxide atmosphere of Mars,[36] making it much harder for an aircraft to generate adequate lift.
The planet’s atmospheric density is about 1⁄100 that of Earth’s at sea level, or about the same as 87,000 ft (27,000 m), an altitude never reached by existing helicopters. To keep Ingenuity aloft, its specially shaped blades of enlarged size must rotate between 2400 and 2900 rpm, or about 10 times faster[10] than what is needed on Earth.[37][38]
The helicopter uses contra-rotating coaxial rotors about 1.2 m (4 ft) in diameter, each controlled by a separate swashplate that can affect both collective and cyclic pitch.[39]
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https://en.wikipedia.org/wiki/Ingenuity_(helicopter)#Design
The blades on Ingenuity are huge compared to the body they lift. Far, far larger in scale to a UH-1’s if Ingenuity’s body were the size of a UH-1. And they rotate at 2400rpm to generate the lift needed in Mars’ near vacuum.