3 ms·

Helicopters have landed on the top of Mt Everest, more than once. True that not every helicopter can do it, but it can be done.

• praptak 5y ago
  Yes. Curiously, the pilot reported that they also used updrafts.
• m463 5y ago
  I thought the problem was that in the thin air, the rotors have to spin much faster and the tips go supersonic. Would rotors with large surface area be how those helicopters work?