Reely 340.
The big big difference is that Vuichard is calling his technique: recovery from VRS.
The lesson to learn here reely is that he is never in VRS. He is only ever demonstrating (in all his shots) how to recover from IVRS.
There is a HUGE difference.
Quite a few helicopter pilots have experienced IVRS, they probably aren't 100% sure what is happening but they manage to scramble out of it - somehow. And they live to fight another day.
BUT when you enter FULLY DEVELOPED VRS, your helicopter takes on its own persona and you may well become an unwilling passenger.
We used to teach FDVRS in the mil - many moons ago. Entry heights were greater than 8000 feet due to the height lost. Some a/c were lost before the mil put an end to it all.
But I will never forget the characteristics of FDVRS:
yawing, pitching, rolling - uncontrolled (yawing was dependent on the vortices blowing thru the tail rotor area).
RoD: extreme figures - 2,3,4000+ feet per minute. As some say- the gauge was off the clock - pegged!
Recovery must be forceful and sustained - fwd cyclic (20 degrees plus and lower the collective, maintain pedals central.
[If you bottom the collective - autorotation is a recognised way of coming out of VRS]. You cannot get VRS in an auto state - aerodynamically impossible.
So - all these pretty videos are bull****, UNLESS there is a loss in translation and Vuichard means IVRS and not VRS.
One simply cannot recover from FDVRS within tens of feet - absolute complete and utter bollock*.
How does one sift thru this minefield of cross purpose advice and guidance:
Simple, remember this:
If you are experiencing a gradual and increasing RoD.
A/c starts to vibrate.
Controls gradually feel less responsive.
Speed is low (<20kts ish - no fixed figure).
You are almost certainly entering IVRS.
Response - gentle nose fwd atleast 20 degrees and HOLD, gently lower the collective (IF height permits). Sorted.
If height doesn't permit: nose fwd 20 degrees and apply collective to a sturdy RoC setting - this is called the "minimum ht loss technique".
IVRS will always allow the pilot to respond without much of a rush.
YOU HAVE TO ALLOW IVRS TO CONTINUE if you want to experience the true VRS.
And believe me when I say - you will never forget what that feels like (if you live to tell the tale), because you'll need hundreds possibly 1000' to recover.
Here the recovery technique is the same but because you are running out of height - the minimum ht loss technique is advised, in this order:
Nose down atleast 20 degrees and HOLD (to regain ample fwd speed).
THEN
Raise collective to max RoC setting to get away from terra firma!
Look back over this very long thread to learn more. And spread the word that Vuichard is talking bollox. [Unless of course he actually is talking about IVRS and not FDVRS].