Reply to post: Re: @EveryTime

Helicopter crashes after manoeuvres to 'avoid... DJI Phantom drone'

SkippyBing Silver badge

Re: @EveryTime

'Having said that, there is always the possibility that the instructor forgot about the dangers of "vortex ring state"'

You can't get into vortex ring state that close to the ground, the pre-conditions are power applied, slow forward airspeed (~20 knots although generally that's because the airspeed indicator won't read lower anyway) and a high rate of decent. It's very hard to have the last one close to the ground for long enough to enter vortex ring state without just hitting the ground.

Note in a lot of cases people mis-identify settling with power as vortex ring state, in that case you just don't have enough power left to stop the descent.

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