When recovering from a settling with power condition,
the pilot tends first to try to stop the descent by increasing
collective pitch. However, this only results in increasing
the stalled area of the rotor, thereby increasing the rate of
descent. Since inboard portions of the blades are stalled,
cyclic control may be limited. Recovery is accomplished
by increasing airspeed, and/or partially lowering collective
pitch. In many helicopters, lateral cyclic combined with
lateral tailrotor thrust will produce the quickest exit from the
hazard assuming that there are no barriers in that direction.
In a fully developed vortex ring state, the only recovery may
be to enter autorotation to break the vortex ring state.
Tandem rotor helicopters should maneuver laterally to
achieve clean air in both rotors at the same time.
faa-h-8083-21 Helicopter Flying Handbook 11-9
And before you get all excited because about the SWP, the definition of VRS/SWP given by the FAA:
VORTEX RING STATE (SETTLING WITH
POWER)
Vortex ring state describes an aerodynamic condition
where a helicopter may be in a vertical descent with up
to maximum power applied, and little or no cyclic
authority. The term “settling with power” comes from
the fact that helicopter keeps settling even though full
engine power is applied.
That's fine with me, since the FAA has to be careful not to puzzle to many old CFI's who have taught SWP for their whole life.
That book is from 2012. Since the FAA isn't the fastest agency in the world, we can assume, that it took them a few years to get to that point.
In the acknowledgements the FAA has the guts not to mention Vuichard for his contribution, neither Robinson nor Tim Tucker. Didn't they know, that Vuichard owns the rights? Or have the authors just known that stuff for years and did not bother. According to the FAA you don't even have to use more power.
Man, must be a shock to the Swiss, that the FAA, that terrible agency that certifies people after cheap training, was actually faster ... again.
And if somebody is really interested in VRS, I found
this from NASA.
And for heavens sake yes, I will call it from now on FVRS with a descent rate way beyond the lightly shaded area. You win.