Going back to the OP who begins with a quote for a techinque to address settling with power:
Another recovery technique is called the Vuichard Recovery Technique: initiate the recovery by increasing the collective to takeoff power, then simultaneously applying power pedal to maintain heading and opposite cyclic (15-20 degree bank) cross controls to get lateral movement. As soon as the rotor disc reaches the upwind part of the vortex the recovery is completed. Average loss of altitude during the recovery is 20-50 ft depending on the duration of the recovery procedure.
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The message that needs to be out there is that IT IS THE WRONG TECHNIQUE for recovering from either IVRS or VRS.
It is bad enough trying to pronounce this guys name never mind trying to remember whether to PULL power or LOWER the lever.
[Although - technically in VERY powerful turbine engined helos - there is a case for removing oneself from VRS using 'application of power'].
In MOST cases, when in VRS, the following is observed:
Vibration.
Sloppy feedback response in the controls.
Pitching, rolling and yawing to some extent.
Blade slapping.
Recovery technique for VRS:
Select smooth (do not "ram") and progressive nose fwd using cyclic to around 20 degrees n/d.
As the a/c departs the turbulent VR, controls become more responsive.
Feed in collective power to minimise height loss. (Usually >8kt fwd speed).
VRS requires most helo's to be in a RoD of around 800 - 2500 feet per minute. Anything greater than this is due to the a/c simply 'falling' out of the sky. In fact, >2500fpm pushes the descending helo out of the VR.
WHILST IN A VRS DO NOT RAISE THE COLLECTIVE -it will aggravate the VRS.
http://www.pprune.org/rotorheads/116...-merged-3.html
refers (post 51+)
Quote from N Lappos:
During VRS, typical modern helicopters retain some cyclic control. The rate of descent will make the horizontal tail try to pitch the nose down, which will help you recover. Reduced collective and nose down will produce a fast exit from VRS. Increased collective will only help if the aircraft has a great deal of excess power, not at all likely in anything but an empty machine with powerful turbine engines.
Note from the data on the web site that VRS is unlikely in a purely vertical descent, some forward speed is needed, maybe 8 knots. In practice, it is difficult to attain and hold VRS, as the condition is unsteady and tends to break of its own if any disturbence is induced. That does not mean it can't do harm, since the first 1000 feet of drop might be several hundred feet too many!
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Please make sure you are 100% certain you know how to avoid VRS in the first instance (IE: Identify IVRS early and recover with N/d and power ).
IF you are unfortunate to find yourself in fully developed VRS (and you have the height beneath you to recover) - select >20 degrees n/d, check down on collective, clear the VR, then and
only then pull power.
