Osprey hard landing

From the picture, it looks like a real hard landing.

One Marine dead

RIP

 
Damn. . .

Vortex Ring State ("VRS")?

The v22 protects rotor speed before thrust, so if the pilot commands more power/thrust than the engines can provide the aircraft will reduce collective pitch in order to maintain rotor speed.  This obviously results in a large unexpected reduction in thrust when the pilot is commanding an increase in thrust and bad things happen.

VRS is extremely unlikely.  More likely is pilot error, ran out of power, engine failure, etc.  It's all digital and everything is recorded, so they'll know what happened real soon if they don't already know.  Uninformed speculation is just that.  

i would have to disagree on your point about VRS being extremely unlikely.  Little to no forward airspeed combined with a relatively high initial rate of descent.....the ingredients are all there.

I would disagree with your disagreement.  You are speculating without the required knowledge.   V22 has very high disk loading and thus very high down wash velocity, making vrs difficult to induce.  Ever wonder why nobody talks about vrs on f35?  Because it has even higher velocity down wash and it can't happen.  

Already lost one V-22 to VRS, but certainly would be hard to speculate that was the issue here

If you do manage to get a a v22 into vrs it will roll sharply towards the rotor that is in vrs.  This roll worsens the vrs(vrs rotor descends deeper into vrs, non-vrs rotor climbs thus moving farther away from vrs).  Looks like this aircraft descended vertically with a stable and level roll attitude.

But they will just playback the recorder and won't have to speculate.

....



Vortex ring state on an F35?



Come on dude

VRS is simply a rotor re-injesting air that already has a downward velocity component.  If the downward velocity component is high enough the rotor is unable to accelerate the air flowing through the rotor enough to generate the required amount of thrust.  No reason it can't happen to a shrouded fan or a jet engine.  

The heavier the disk loading the higher the downwash velocity is.  A jet engine might make 20k lbs of thrust and is 2 feet diameter while a blackhawk hovering at 20k lbs makes the same thrust over it's 54 foot diameter rotor.  The jet exhaust could be supersonic while the blackhawk rotor exhaust might be 50mph.  A 10mph velocity increase in the air each is injesting has a huge effect on the blackhawk (20% thrust loss) while the jet engine barely notices it(1-2% thrust loss).

The f35 lift fan is shrouded and has a significantly higher disk loading than even a v22.  It will never fly vertically more than a few dozen feet and I assume it has vertical velocity limits programmed into the flight controls.  So nobody is concerned about it.  

Besides, it will auto-eject you if there is a problem with the lift fan.  So what could possibly go wrong?  

Just stop.

You get points for imagination but your "wrong" meter is pegged.

 

Your description of VRS is missing the Vortex Ring.