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Re:NASA plans to launch a spacecraft to Titan by dev_tty01 on Friday June 28, 2019 @05:28PM (#20308919)
No problem. Large atmospheric chamber or controlled wind tunnel. Pump the pressure up or down, change the gas mixtures, whatever. Gravity, partially support the drone's weight. NASA is good at this stuff.
Re:NASA plans to launch a spacecraft to Titan by nradov on Saturday June 29, 2019 @12:41AM (#20310851)
Yes that's how they tested the Mars drone.

https://www.jpl.nasa.gov/news/news.php?feature=7417