Why aren’t helicopters used to rescue hikers and remove bodies from Mt. Everest?

Question

Why aren’t helicopters used to rescue hikers and remove bodies from Mt. Everest?

In: Physics

Answer 1

Helicopters need to be able to collect enough air for their engines to burn fuel while standing still. They top out on that at 10-20,000ft. Everest is 30k or so. This is less of a problem for planes because they can fly at high speed through the thin air and scoop it up into their engines.