Vortex Ring State Demonstration and Recovery (FSX)

http://geardownfs.com/

Demonstrating the aerodynamic phenomenon known as VRS, or Vortex Ring State, in the Dodosim Bell 206B Jetranger. Not a tutorial or anything, just a quick demonstration of what VRS is, how it is induced, and how we can recover from it.

Vortex Ring State is when you descend into the helicopters own down wash, or "Dirty Air". It is induced by having a high rate of decent with a low forward airspeed. In this demonstration, I am in an OGE hover (Out of Ground Effect), and lower the collective to descend into the down wash. The helicopter starts vibrating, and begins a rapid descent. This is VRS.

Recovery is simple, but opposite of human nature. As we fall, we lower the collective, to make the down wash area as small as possible, and apply forward cyclic pressure, to move out of our own down wash as we build up forward airspeed. It is human nature to add to the collective as we start falling, however, this will only create a bigger down wash bubble, and will make the VRS situation worse, and we don't want that to happen.

In this demonstration, the collective was lowered a bit too much, hence the rotor going far over the safe RPM area. Wouldn't be good in real life, luckily, this is only a simulator.

Тэги:

#microsoft #flight #simulator #fsx #msfs #dodosim #bell #206b #jetranger #III #vrs #vortex #ring #state #aerodynamic #recovery

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