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Excluding how a runway would exist at 30,000 ft, could landing a plane at that altitude be done? What would it take to do so?

enter image description here Very Basic Wind rose for Mount Everest

Weather Phenomena That Could Impact Aviation Operations:

High Density altitude (1/3) density altitude of sea level. Planes capable of a ceiling of 35000 ft required. Ground effect deceleration landing required. Strong crosswinds and updrafts present year-round. Build from ice, the runway is 3 to 5 times longer to compensate for Density Altitude, wind, and ice. 10 percent chance of rain year-round. In the middle of June to September the monsoon season produces heavy precipitation. The temperature ranges from -2º F to -76º F. Banner clouds often present. The Subtropical jet stream maybe present with winds exceeding 80mph. If the Polar jet stream merges with the sub-tropical jet stream wind could exceeded 120mph. Supplemental oxygen maybe needed. Presume landing is done in head-wind only.

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    $\begingroup$ Landing is less of a problem. All it needs is a very long runway, tires strong enough for the higher speeds and a beefed-up landing gear for the higher sink speed. Taking off again from this runway will be the really hard part! $\endgroup$
    – Peter Kämpf
    Sep 28, 2020 at 5:58
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    $\begingroup$ Does this answer your question? What would be the challenges to taking off and landing a typical passenger jet at FL300? $\endgroup$
    – MaximEck
    Sep 28, 2020 at 7:43
  • $\begingroup$ @PeterKämpf what about flap speed? $\endgroup$
    – Abdullah
    Sep 28, 2020 at 9:10
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    $\begingroup$ @Abdullah The flap speed limits are IAS limits and you would land at the same IAS. It's just that this IAS would correspond to a much higher TAS at these altitudes. $\endgroup$
    – Bianfable
    Sep 28, 2020 at 9:47

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