PPRuNe Forums - View Single Post - Vuichard technique for settling with power?
Old 13th Sep 2017, 15:29
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The website press-release has a hint of the paranoid 'The system knows this is the answer but they're keeping it quiet' conspiracy theory.

Fist it references the Sumburgh accident which was caused by mismanagement of the AP and poor CRM, the fact that they eventually entered VRS was just seconds before impact.

I would love to see him use his famous recovery technique in a situation like that.

His only other example of the
Every year, numerous helicopter accidents happen due to the vortex ring state.
which is the opening gambit is an instance when he frightened himself in the mountains on long-line work.

They talk a lot about the 'suction' from underneath the rotor and how you need to get away from it - are they really the words of an aviation professional?

So the only other person to 'validate' this technique is Tim Tucker who may or may not have a vested interest in adding something that looks like good value to the Robinson Safety Course other than 'don't chop the tail off'.

It would be interesting to know how many other manufacturers have been offered/shown this technique since no-one else seems to be interested in it.

Perhaps the secret lies in the words of the website
However, the
certification specifications CS27 and CS29, analogical to the FAR27/29 in the United States, do not require a defined maneuver in order to escape the
“vortex ring state”.
since the FAA helicopter flying handbook defines
VRS as
A transient condition of downward flight (descending through air after just previously being accelerated downward by the rotor) during which an appreciable portion of the main rotor system is being forced to operate at angles of attack above maximum. Blade stall starts near the hub and progresses outward as the rate of descent increases.
it would be quite difficult to specify such a manoeuvre.

Therefore you can call any low speed descent VRS and claim a recovery technique for it.
crab@SAAvn.co.uk is offline