PLEASE READ FOLKS: My hat is off to Mr. Vuichard. Sir, I owe my life to this technique. True story. I am a retired US Military Pilot (US Army helicopter pilot with over 37 years of flying experience, accident and incident free all of these years, I'm retired now). When I retired I started flying EMS helicopters. I responded to a scene flight at 2:00 am in the morning, zero moon illumination, and overcast skies. I had my ANVIS 9 NVG's thank goodness. My landing zone was extremely tight and I made 3 attempts to land with no luck so my last option was to land with a tailwind (not the best decision), I should have landed at another location and had an ambulance take my medical crewmembers to the scene, but I didn't. On final approach at approximately 400 to 500,' I IMMEDIATELY started to settle in my downwash (Vortex Ring State, VRS). I knew right away what was happening, not my first time in VRS. The trees were 150' (tall pines), if I had attempted to recover the old way, by lowering collective (altitude permitting) and flying out of the VRS I would have smacked the trees (98% sure that would have been the end result). Sir, I performed the "Vuichard Recovery Technique" I learned 6 months earlier and BAM!!!!! I "immediately" stopped my sink rate in
Congratulations on your amazing achievement! This looks like a challenging situation to get out of. This visual helps in the understanding of the laws of The Vortex Ring State. I am happy you were able to save yourself in that situation.
This very clever presentation should be shown in all helicopter flying schools and annual recurent trainings everywhere. So clear ! It will save helicopters and lives. Merci !
You are so correct, read my comments above. I am going to call Fort Rucker and talk to the Army Senior Standardization Pilot at the US Army helicopter school and ask is he has seen this video, if NOT I will send him the link.
Awesome! The visualization of the Ring State with the mist really drives the point home. You can instantly see when the rotor system enters and exits. Keep up the great videos!
I’m not sure who gave this a thumbs down but I hope they never fly a helicopter with passengers. In every walk of life you will find knobheads I suppose. Great video. Great visuals. Life saving techniques demonstrated. Thank you.
Tim Tucker gave me my PPL checkride in 2014. We did traditional recovery. I passed. I just did the Robinson safety course in August and we did this Vuichard recovery. It's so much quicker and more efficient. We are told to use takeoff power, roll right, and add left pedal. It's that easy. Recovery is fast and easy. If you have an obstacle on your right you can roll left.....just takes a bit longer. THANKS TIM TUCKER
Tim tucker gave me my PPL -rotorcraft helicopter in I think 84. Some 35 or so years ago. Then my commercial in 88. That guy is AWESOME !!! Unfortunately I have not flow rotorcraft in over 15 years, I would hang up the G550 to fly the old Robinson 22 model HP again
GENIOOOOOOOOOOOO !!!!!! GRACIAS POR ESTE VIDEO. I ALSO TAKE OFF MY HAT TO MR.VUIVHARD BECAUSE OF HIS BRILLIANT TECHNIQUE, BUT WHAT IMPRESSED ME MOST, WAS HIS WAY OF SHOWING IT. CONGRATULATIONS AND I REITERATE MY GRATITUDE
I had heard of vortex ring state as a risk for helicopters and found this video. The visualization provided by the mist makes it stunningly clear what is going on and why it would be such a risk in flight.
Great video and very well done. We have been using this technique for over 25 plus years in the Canadian Helicopter industry. It is extremely effective for longline operations. The use of spray booms gives the perfect visual effect. Two thumbs up!
I'm not a pilot but have a deep love of helicopters. Have spent many hours in a sim thanks to a good friend and successfully did a number of autorotation landings and a 360 degree pirouette with nose pointing at a fixed object. Simple for you pilots but a bit much for a total rookie. I just want to add my compliments about this amazing video. Seeing the phenomena actually happen and how to recover gave me goosebumps. Awesome video and no doubt it will save lives. Seeing is so much more effective in teaching than just words or drawings. Bravo!
6 ปีที่แล้ว
E Smith I can recommend RC helicopters. Basically even harder than real ones (in some ways) but much cheaper and safe! Very rewarding when you progress with RC. Oh, also, inverted flight!
I am a helicopter engineer, not a Pilot, however I use a simulator and enjoy flying the simulator. I have practised this procedure upon discovering it recently, also spend time really understanding everything, getting out of the dirty air as quickly and safely as possible.
Helicopter pilot for 20+ years and 6k+ hours. Absolutely amazing procedure! The other procedure is so ingrained into me as a motor skill now, I just hope I can remember this one next time. Great way to demonstrate visually! Well done videography also! Hope they put this video and the procedure into all RW flight Training and the manuals! Thanks!
What amazes me is how quickly the vortex is destroyed, the helicopter only needs to move sideways by half the rotor diameter and the vortex just breaks up. I had visualised that it needed to move sideways by a whole diameter but it appears that you don't. Excellent and very informative.
I managed to wrap my head around it from explanations, and had a working mental picture of what was happening, but seeing it like that in such exact detail was unreal, great job 👏 👍
This is Exactly why we no longer use helicopters to spray insecticides. 22 years going through pilots like hot potatoes, all ending up with weird tumors and respiratory issues. You can see the spray completely engulf the cab at low speed, that's every corner and turn on every field. The Hiller 12E was much more efficient than the Air Tractor fixed wing, but not when it comes to pilot health. Now Finally the multi Billion dollar lawsuit against the weed killer Round Up. Thank you for the great visuals and emergency procedure training!
I thought the helicopters cab were like air tight. Or why don't they make it air tight so nothing gets in there which means none of those harmful sprays get in contact with the pilot ?
@@xoxoj That would be nice, but they haven't done it yet. Now Japan has made remote control units to fly the helicopter so a pilot is no longer needed for spraying. Have a Great day!
Wow, Your experience really shocked me. I couldn't think about this phenomena not only affects the vehicle stability and also pilot's health like your cases.
Thank you for this beautiful video, but most of external load pilots knew and used this recovery technic before you named it Vuichard, as vortex are part of our daily job.. Cyclic foward (or into the main wind) and pich lowered is still a good technic depending of the vortex conditions, quality of your blades, rotor efficiency, trajectory/path, hight, (cross)wind(s), landshape and type of obstacles you got around you. One technic, does NOT replace the other, they are just complementary and combinable.
This is an amazing video showing the Vortex Ring State. It was visually captivating, and showed the air and how it behaved around the helicopter. This method was en genius. Thank you for sharing your knowledge!
Thank you, this is an impressive demonstration ! I am sorry but, does it happen only when there are "walls" (as in canyon, or montains) allowing the air flow to make the ring ?
Well that's certainly convincing. My instructions were always "move" in the quickest way possible, whether forward sideways or even aft. But this strongly suggests that "right is right" (for my machine). THANK YOU!
Not a real pilot here (my full respect to those who fly helicopters for real), but turns out this manouver is quite effective even on the Mi-24P Hind in DCS which is very VRS-happy when slowing down to hover. Halved the minimum altitude needed to recover. I am truly amazed.
I'm not a helicopter pilot, but my understanding is this method wouldn't work with autos because the airflow is coming from the front through the top of the rotor and not recirculating like in VRS, so the spray wouldn't be able to show the flow patterns through the rotor.
Vortex Ring State is a dangerous state to be in. The Vuichard Recovery Technique is a risky maneuver and in my opinion should only be attempted if no other better option is available. Don't believe me. Just pause the video at 3:38 and see just how close he comes to striking his own tail boom and he has obviously had lots of practice. Different models of helicopters the margin of error for this maneuver may be greater or lesser.
Thank you very much for your comment. The vortex ring state is a special flight state that should not be achieved in training, but as mentioned at the beginning of the movie: This video allows the vortex ring state to continue to develop for demonstration purposes. When practicing, recovery should be initiated at the first signs (lightness in the seat) in the initial stage of the vortex ring. On the other hand, I disagree that in the "Vuichard Recovery Technique" the rotor disc gets closer to the tail boom. In the sequence 3:38 you mentioned, it is a perspective from below that gives this impression! Look at other sequences, e.g. 2:55-3:00, and you will see that the rotor disc is high during the recovery. With the „Vuichard Recovery Technique“, additional power is applied on the rotor, which increases the rotor conicity. Also, during the lateral movement, there is no backward movement of the rotor disc, which move the rotor disc any closer to the tail boom. In the future, these maneuvers will certainly be practiced only in the simulator, so that pilots can use them reflexively in critical situations, as you also mentioned. It is clear that the best recovery technique is the one you don't need, so I will soon bring a new video on "How to avoid a Vortex Ring Sate in helicopter operations". Part I of III will be released in the next few months. Safe flights
wow just wow this is excellent where you got the idea and then the execution of the whole plan this is awesome you explain something to me in a way that no one else can thank you thank you very much
great video, great visuals would be really helpful to show more from inside the cab to "see what it feels like" as I imagine there is specific feedback from the heli which should be taught to be recognized
Great idea .... One thing I don't understand the Lama is a CCw rotor sys( looks like I am not rated) and should escape to the right by description note "2" but instead in the videos it escapes to the left??! Someone could explain where IAm wrong?
Excellent demonstration. What technique would you recommend if the aircraft was rotating uncontrollably and descending with an armful of collective? i.e. Settling with power and spinning. (Personal experience - (;>0))
Dear John The points listed below primarily to avoid uncontrolled turns: Hover flight or very slow speed flight with helicopters. Wherever possible, rotation around the vertical (yaw) axis of the fuselage in hover flight should always take place in the direction of the main rotor rotation (power pedal). This requires more power, but can readily be stopped again without the need for additional power. If an unintended rotation in the opposite direction to that of the rotor should occur due to cross or tail wind, or as a result of a sudden increase in the collective pitch, the following action should be taken immediately: The power pedal of the tail rotor control should be applied, if necessary to its maximum extent (mechanical stop), and held in this position until the rotation stops. When a helicopter is being operated at the limit of its performance capability, for example in the mountains, it is important to operate the power pedal at an early stage, especially on approach or when rapidly increasing collective pitch, in order to ensure that no directional changes in direction around the vertical (yaw) axis can occur. This action prevents an unintended rotation opposite to the direction of the rotor rotation, which can only be stopped by applying additional power and usually results in a decrease in the main rotor RPM, since in certain circumstances the required additional power may no longer be available. A decrease in the main rotor RPM leads to a corresponding decrease in the tail rotor RPM, which may, in certain circumstances, result in a complete loss of tail rotor efficiency. Hover and very slow speed flights out of ground effect should be carried out with sufficient reserve power and only by pilots who have been trained for this kind of operation (CPL level) and have the necessary practical experience. Best regards Claude Vuichard
My one and only episode occurred during training in mountain flying techniques in the Rocky Mountains many years ago in Alberta. I took control from the other pilot, dumped some collective, opposite pedal, forward cyclic, and were out of the situation in seconds. (We were tucked up tight to a mountain, so had altitude to play with if we didn't tumble down the mountain side first... (;>0))
Great tool for helicopter pilots. Let's also discuss when it is not the right tool for recovery from VRS. Obstacles on the side you would translate toward for this recovery would preclude its use. Also, if you're already moving forward, such as during a normal approach, a forward recovery should still make sense. Also, if there's any confusion during the event whether the descent & vibrations are from VRS or overpitching, the traditional recovery should be used, because it solves both. So, Vuichard Recovery is a great technique--the best in certain circumstances--but not an absolute replacement for the traditional method. CFIs should teach both, and especially should teach when to use each.
Wow, to actually see the airflow going the wrong way through the rotors is really enlightening. And terrifying. I'm a fixed wing pilot. But I'm curious as to whether you can get in the stall far enough to where you wouldn't even be able to command a roll to execute this. I'm a fixed wing pilot, but I find this interesting.
Hello there , I have a question. Military pilots have to undergo confined area approaches in the field, where the rate of decent is arrested at 500-400 feet and then at the end u come up on power and settle down the aircraft. Could you pls highlight another technique for this. Pilots arrest the rate of decent till 4-500 and speed within ETL TILL THE VERY END . If you have something to add to it, I’d be very happy to take note of it. Thanks
Very interesting, impressive & so good to understand what happens in this situation/maneuver. Also for me as a huge 🚁-Fan with only R/C HELI experience & without a real pilot-license ;] Cool video 👍🏼‼️
Феноменально! Пилотам надо дать соответствующую премию. Операторам съёмки тоже. В первые вижу визуализацию вихревого кольца несущего винта выполненного на реальном вертолёте!!! Спасибо
Correct me if I'm wrong but the story goes like this right? So the Swiss pilot Claude Vuichard had a lot of experience flying a helicopter somewhere around three or four thousand hours. He had a lot of experience with approaches and high and out of ground affect hovers. He knew the traditional recovery procedure of pointing the nose forward lowering the collective to lower the power which reduces the amount of power you're giving to the rotors which is increasing the vortices encompassing your rotor system which when in vortex ring state will only make the situation worse and also with a high pitch angle when is Vortex ring state such as when the collective is pulled up without the proper air flowing over the rotors such a high angle of attack cannot sustain lift with all the dirty air being fed back into the rotor system when in Vortex ring state. He knew to push the nose forward and lower the collective reduce the power and increase your AirSpeed and come out of the vortices and regain ETL. Claude Vuichard knew what to do when in vortex ring state and new when in a high out of ground hover to avoid getting into a descent rate and increasing the chances of getting into vortex ring state. One day though he was flying near the mountains and was in a hover and was being carried by an updraft. He was at a high altitude and the air was thin but he was being carried upwards by an updraft. Suddenly the updraft went away and he fell through into a descent rate the wind changes then was behind him and suddenly he was in Vortex ring State. He was quickly approaching the ground and all around him were obstacles such as trees other cliffs and such things of such a nature. He knew how to perform the regular recovery but the ground was coming up fast and he knew he didn't have time to regain his airspeed come out of the dirty air on time before the ground caught up with him. He was going to hit the ground and made a decision to step over to the right with the cyclic to a softer spot of ground and try and pull up on the collective to cushion the landing. In doing so he realized he'd come out of the vortex ring state and was holding a hover. He immediately pushed forward and continue to pull up on his power to regain lift and enter forward flight. After doing this he realized "there's a better way to recover from vortex ring state" and hence the Vuichard recovery method was created. Did I get that story right?
Really cool way to visualize it
PLEASE READ FOLKS: My hat is off to Mr. Vuichard. Sir, I owe my life to this technique. True story. I am a retired US Military Pilot (US Army helicopter pilot with over 37 years of flying experience, accident and incident free all of these years, I'm retired now). When I retired I started flying EMS helicopters.
I responded to a scene flight at 2:00 am in the morning, zero moon illumination, and overcast skies. I had my ANVIS 9 NVG's thank goodness. My landing zone was extremely tight and I made 3 attempts to land with no luck so my last option was to land with a tailwind (not the best decision), I should have landed at another location and had an ambulance take my medical crewmembers to the scene, but I didn't.
On final approach at approximately 400 to 500,' I IMMEDIATELY started to settle in my downwash (Vortex Ring State, VRS). I knew right away what was happening, not my first time in VRS. The trees were 150' (tall pines), if I had attempted to recover the old way, by lowering collective (altitude permitting) and flying out of the VRS I would have smacked the trees (98% sure that would have been the end result).
Sir, I performed the "Vuichard Recovery Technique" I learned 6 months earlier and BAM!!!!! I "immediately" stopped my sink rate in
Mich B Glad you got out alive Mr.B☺ Great comment!
Love this comment - top work sir
Awesome stuff. Thanks for your service.
Awesome testimony! Everyone needs to learn this Technique
Congratulations on your amazing achievement! This looks like a challenging situation to get out of. This visual helps in the understanding of the laws of The Vortex Ring State. I am happy you were able to save yourself in that situation.
As a CPL and instructor with over 7000 hours this is brilliant!
This very clever presentation should be shown in all helicopter flying schools and annual recurent trainings everywhere. So clear ! It will save helicopters and lives. Merci !
You are so correct, read my comments above. I am going to call Fort Rucker and talk to the Army Senior Standardization Pilot at the US Army helicopter school and ask is he has seen this video, if NOT I will send him the link.
Tail curl
Awesome! The visualization of the Ring State with the mist really drives the point home. You can instantly see when the rotor system enters and exits. Keep up the great videos!
I’ve studied your videos over and and over again! Made it through at Rucker and a lot of my understanding of .4 aerodynamics is owned to your videos
Very good explanation
I’m not sure who gave this a thumbs down but I hope they never fly a helicopter with passengers. In every walk of life you will find knobheads I suppose. Great video. Great visuals. Life saving techniques demonstrated. Thank you.
I've seen quite a few illustrations of VRS in my time, this has to be the best by a very long way.
Thank you sir.
Tim Tucker gave me my PPL checkride in 2014. We did traditional recovery. I passed. I just did the Robinson safety course in August and we did this Vuichard recovery. It's so much quicker and more efficient. We are told to use takeoff power, roll right, and add left pedal. It's that easy. Recovery is fast and easy. If you have an obstacle on your right you can roll left.....just takes a bit longer. THANKS TIM TUCKER
Tim tucker gave me my PPL -rotorcraft helicopter in I think 84. Some 35 or so years ago. Then my commercial in 88. That guy is AWESOME !!!
Unfortunately I have not flow rotorcraft in over 15 years, I would hang up the G550 to fly the old Robinson 22 model HP again
GENIOOOOOOOOOOOO !!!!!! GRACIAS POR ESTE VIDEO. I ALSO TAKE OFF MY HAT TO MR.VUIVHARD BECAUSE OF HIS BRILLIANT TECHNIQUE, BUT WHAT IMPRESSED ME MOST, WAS HIS WAY OF SHOWING IT. CONGRATULATIONS AND I REITERATE MY GRATITUDE
Brilliant Demo!
I had heard of vortex ring state as a risk for helicopters and found this video. The visualization provided by the mist makes it stunningly clear what is going on and why it would be such a risk in flight.
Great video and very well done. We have been using this technique for over 25 plus years in the Canadian Helicopter industry. It is extremely effective for longline operations. The use of spray booms gives the perfect visual effect. Two thumbs up!
KMAXdawg ...guess Canadians can keep secrets ha haha
Excellent demonstration that will save lives. Deserves a safety award.
So you you kind of slide diagonally out of it?
AT LAST I have found a visual demonstration of what VRS is. Makes so much sense now. Thank you!
Great idea for visualisation of air flow. . . and concept of new, more swift exit route to recovery = should get award. Thanks all.
Wow, that's the best visualization of VRS I've ever seen!
This should be mandatory viewing. Good job, and thank you.
I'm not a pilot but have a deep love of helicopters. Have spent many hours in a sim thanks to a good friend and successfully did a number of autorotation landings and a 360 degree pirouette with nose pointing at a fixed object. Simple for you pilots but a bit much for a total rookie. I just want to add my compliments about this amazing video. Seeing the phenomena actually happen and how to recover gave me goosebumps. Awesome video and no doubt it will save lives. Seeing is so much more effective in teaching than just words or drawings. Bravo!
E Smith I can recommend RC helicopters. Basically even harder than real ones (in some ways) but much cheaper and safe! Very rewarding when you progress with RC. Oh, also, inverted flight!
I am a helicopter engineer, not a Pilot, however I use a simulator and enjoy flying the simulator. I have practised this procedure upon discovering it recently, also spend time really understanding everything, getting out of the dirty air as quickly and safely as possible.
Well done my man. Clever. Realistic. Teachable. Must become standard recovery maneuver .
Bravo! To all involved in the creation of this video.
Increase collective? To max power?explain.
Increasing collective would cause more of a stall right?
It provides max authority to the tail rotor.
Helicopter pilot for 20+ years and 6k+ hours. Absolutely amazing procedure! The other procedure is so ingrained into me as a motor skill now, I just hope I can remember this one next time.
Great way to demonstrate visually! Well done videography also! Hope they put this video and the procedure into all RW flight Training and the manuals!
Thanks!
What amazes me is how quickly the vortex is destroyed, the helicopter only needs to move sideways by half the rotor diameter and the vortex just breaks up. I had visualised that it needed to move sideways by a whole diameter but it appears that you don't. Excellent and very informative.
Brilliant .... an excellent exercise .. shows that pictures (especially moving ones) can save thousands of words .. thank you !!
Thank you Steve
Thank you Claude for all your work and engagement for safety in the helicopter business. Absolutely brilliant and clear message for all pilots.
I managed to wrap my head around it from explanations, and had a working mental picture of what was happening, but seeing it like that in such exact detail was unreal, great job 👏 👍
This is Exactly why we no longer use helicopters to spray insecticides. 22 years going through pilots like hot potatoes, all ending up with weird tumors and respiratory issues. You can see the spray completely engulf the cab at low speed, that's every corner and turn on every field. The Hiller 12E was much more efficient than the Air Tractor fixed wing, but not when it comes to pilot health. Now Finally the multi Billion dollar lawsuit against the weed killer Round Up.
Thank you for the great visuals and emergency procedure training!
I thought the helicopters cab were like air tight. Or why don't they make it air tight so nothing gets in there which means none of those harmful sprays get in contact with the pilot ?
@@xoxoj That would be nice, but they haven't done it yet. Now Japan has made remote control units to fly the helicopter so a pilot is no longer needed for spraying.
Have a Great day!
Wow, Your experience really shocked me. I couldn't think about this phenomena not only affects the vehicle stability and also pilot's health like your cases.
Drones are now taking over.
What a phenomenal demonstration!! Thank you, sir!
Thank you for an excellent presentation. This really helps visualize what happens.
Thank you for all
Incredible insight into vortex ring state. Thank you
Thank you for this beautiful video, but most of external load pilots knew and used this recovery technic before you named it Vuichard, as vortex are part of our daily job.. Cyclic foward (or into the main wind) and pich lowered is still a good technic depending of the vortex conditions, quality of your blades, rotor efficiency, trajectory/path, hight, (cross)wind(s), landshape and type of obstacles you got around you. One technic, does NOT replace the other, they are just complementary and combinable.
Wow wow wow, what a fantastic detailed demonstration, thanks for doing this 👍🏻♥️
Excellent training video, thank you so much for creating.
What an amazing demonstration. Great job
It's pretty cool seeing it with the spray set up.
Larry Doll at Rocky Mountain taught a similar technique in the 70/80’s Good on ya for using the ag booms for visual reference.
This is an amazing video showing the Vortex Ring State. It was visually captivating, and showed the air and how it behaved around the helicopter. This method was en genius. Thank you for sharing your knowledge!
Wonderful service to safety and knowledge! Thank you.
Great video and lesson for all the aviators out there..thanks 🍀
Very clever, well done to show everyone! I hope this video reach very far!
Thank you, this is an impressive demonstration ! I am sorry but, does it happen only when there are "walls" (as in canyon, or montains) allowing the air flow to make the ring ?
That video is so cool. Love to watch
Awesome demonstration. The UH-1 with counter-clockwise rotor, you must use right cyclic. Thanks for this video!
Absolutely awesome teaching video!!!! Many thanks.
did it with Claude Vuichard successfully, a must know !
Wahou fabuleux très instructif et ces image expetionnel on comprend à merveille.
Absolutely stunning!
Thank you Shaun
Well that's certainly convincing. My instructions were always "move" in the quickest way possible, whether forward sideways or even aft. But this strongly suggests that "right is right" (for my machine). THANK YOU!
Awsome video! Thanks so much for visualizing this manouveaour!!
love this alouette ,mean lama sa 315 n the alouette 2 n 3
This might be the most important life pro tip video on TH-cam.
Amazing technique
Awesom! more clear visual understanding. Thanks Vuichard
巧遇张老师:)
哪一个，报名来 ：）
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zhu jian.
MY HAT IS OFF TO YOU GUYS GREAT WORK !!!!!!!
Awesome demonstration.
One day I will fall into a vortex ring and I will escape it with the technique learnt from this video, for that I will be eternally grateful.
Not a real pilot here (my full respect to those who fly helicopters for real), but turns out this manouver is quite effective even on the Mi-24P Hind in DCS which is very VRS-happy when slowing down to hover. Halved the minimum altitude needed to recover. I am truly amazed.
Very well explained and shown.
Absolutely amazing presentation!! 👏🏻👏🏻👏🏻👍🏻👍🏻👍🏻
I would love to see a vertical auto-rotation. Im not sure we actually know what is truly happening with airflow in that instance.
I'm not a helicopter pilot, but my understanding is this method wouldn't work with autos because the airflow is coming from the front through the top of the rotor and not recirculating like in VRS, so the spray wouldn't be able to show the flow patterns through the rotor.
FANTASTIC vid👍
Wonder why this wasnt thought of earlier. Why did they use either forward or backward opposed to sideways?
WOW! Nothing like a visual!
Vortex Ring State is a dangerous state to be in. The Vuichard Recovery Technique is a risky maneuver and in my opinion should only be attempted if no other better option is available. Don't believe me. Just pause the video at 3:38 and see just how close he comes to striking his own tail boom and he has obviously had lots of practice. Different models of helicopters the margin of error for this maneuver may be greater or lesser.
Thank you very much for your comment.
The vortex ring state is a special flight state that should not be achieved in training, but as mentioned at the beginning of the movie:
This video allows the vortex ring state to continue to develop for demonstration purposes. When practicing, recovery should be initiated at the first signs (lightness in the seat) in the initial stage of the vortex ring.
On the other hand, I disagree that in the "Vuichard Recovery Technique" the rotor disc gets closer to the tail boom. In the sequence 3:38 you mentioned, it is a perspective from below that gives this impression! Look at other sequences, e.g. 2:55-3:00, and you will see that the rotor disc is high during the recovery. With the „Vuichard Recovery Technique“, additional power is applied on the rotor, which increases the rotor conicity.
Also, during the lateral movement, there is no backward movement of the rotor disc, which move the rotor disc any closer to the tail boom.
In the future, these maneuvers will certainly be practiced only in the simulator, so that pilots can use them reflexively in critical situations, as you also mentioned.
It is clear that the best recovery technique is the one you don't need, so I will soon bring a new video on "How to avoid a Vortex Ring Sate in helicopter operations". Part I of III will be released in the next few months.
Safe flights
wow just wow this is excellent where you got the idea and then the execution of the whole plan this is awesome you explain something to me in a way that no one else can thank you thank you very much
great video, great visuals
would be really helpful to show more from inside the cab to "see what it feels like" as I imagine there is specific feedback from the heli which should be taught to be recognized
Great idea .... One thing I don't understand the Lama is a CCw rotor sys( looks like I am not rated) and should escape to the right by description note "2" but instead in the videos it escapes to the left??!
Someone could explain where IAm wrong?
that was the most beautiful thing i ever seen
What an excellent video. I understand now. I fly model quadcopters and would I be correct that there will be two vortexs per propeller then?
Great job 👏
Excellent video.
Excellent presentation!
Are they using the tail rotor to provide thrust out of the ring state? Like would this work with a coaxial or tandem rotor?
Wow! Great job.
Is it "Robinson" or "Robison" at 0:33 you have "Robison" in that text and I would like to know what the correct name is. Thank you.
Hi Ursus, It should be called Robinson, a vexatious mistake..
Awesome! What a greate idea to use a smoke generator to visualize vortex ring, with a live flying helicopter!
I would say Ag booms and water through the nozzles.
Pretty neat procedure
❤thank you for sharing 🙏
Absolutely brilliant !
Excellent demonstration. What technique would you recommend if the aircraft was rotating uncontrollably and descending with an armful of collective? i.e. Settling with power and spinning. (Personal experience - (;>0))
Dear John
The points listed below primarily to avoid uncontrolled turns:
Hover flight or very slow speed flight with helicopters.
Wherever possible, rotation around the vertical (yaw) axis of the fuselage in hover flight should always take place in the direction of the main rotor rotation (power pedal). This requires more power, but can readily be stopped again without the need for additional power.
If an unintended rotation in the opposite direction to that of the rotor should occur due to cross or tail wind, or as a result of a sudden increase in the collective pitch, the following action should be taken immediately: The power pedal of the tail rotor control should be applied, if necessary to its maximum extent (mechanical stop), and held in this position until the rotation stops.
When a helicopter is being operated at the limit of its performance capability, for example in the mountains, it is important to operate the power pedal at an early stage, especially on approach or when rapidly increasing collective pitch, in order to ensure that no directional changes in direction around the vertical (yaw) axis can occur. This action prevents an unintended rotation opposite to the direction of the rotor rotation, which can only be stopped by applying additional power and usually results in a decrease in the main rotor RPM, since in certain circumstances the required additional power may no longer be available. A decrease in the main rotor RPM leads to a corresponding decrease in the tail rotor RPM, which may, in certain circumstances, result in a complete loss of tail rotor efficiency.
Hover and very slow speed flights out of ground effect should be carried out with sufficient reserve power and only by pilots who have been trained for this kind of operation (CPL level) and have the necessary practical experience.
Best regards
Claude Vuichard
My one and only episode occurred during training in mountain flying techniques in the Rocky Mountains many years ago in Alberta. I took control from the other pilot, dumped some collective, opposite pedal, forward cyclic, and were out of the situation in seconds. (We were tucked up tight to a mountain, so had altitude to play with if we didn't tumble down the mountain side first... (;>0))
This is what I want to see!
Excellent 👍👍👍
EXCELLENCE! VUICHARD!
Great tool for helicopter pilots. Let's also discuss when it is not the right tool for recovery from VRS.
Obstacles on the side you would translate toward for this recovery would preclude its use. Also, if you're already moving forward, such as during a normal approach, a forward recovery should still make sense. Also, if there's any confusion during the event whether the descent & vibrations are from VRS or overpitching, the traditional recovery should be used, because it solves both.
So, Vuichard Recovery is a great technique--the best in certain circumstances--but not an absolute replacement for the traditional method. CFIs should teach both, and especially should teach when to use each.
Incredible example!!!!!
Wow, to actually see the airflow going the wrong way through the rotors is really enlightening. And terrifying. I'm a fixed wing pilot. But I'm curious as to whether you can get in the stall far enough to where you wouldn't even be able to command a roll to execute this. I'm a fixed wing pilot, but I find this interesting.
thats beautiful
Wow, great video and ama Inc technique 👍
Hello there , I have a question. Military pilots have to undergo confined area approaches in the field, where the rate of decent is arrested at 500-400 feet and then at the end u come up on power and settle down the aircraft. Could you pls highlight another technique for this. Pilots arrest the rate of decent till 4-500 and speed within ETL TILL THE VERY END . If you have something to add to it, I’d be very happy to take note of it.
Thanks
Great video!!.
I fly drones and have experienced the VRS phenomenon! Great visual !!!
amazing.....
Very interesting, impressive & so good to understand what happens in this situation/maneuver. Also for me as a huge 🚁-Fan with only R/C HELI experience & without a real pilot-license ;]
Cool video 👍🏼‼️
Феноменально!
Пилотам надо дать соответствующую премию. Операторам съёмки тоже.
В первые вижу визуализацию вихревого кольца несущего винта выполненного на реальном вертолёте!!!
Спасибо
Большое спасибо за добрую обратную связь!
To notice, in external load operations, most of vortex ring states (stalls), occure with no load on, empty hook.
thank you!!!
Correct me if I'm wrong but the story goes like this right? So the Swiss pilot Claude Vuichard had a lot of experience flying a helicopter somewhere around three or four thousand hours. He had a lot of experience with approaches and high and out of ground affect hovers. He knew the traditional recovery procedure of pointing the nose forward lowering the collective to lower the power which reduces the amount of power you're giving to the rotors which is increasing the vortices encompassing your rotor system which when in vortex ring state will only make the situation worse and also with a high pitch angle when is Vortex ring state such as when the collective is pulled up without the proper air flowing over the rotors such a high angle of attack cannot sustain lift with all the dirty air being fed back into the rotor system when in Vortex ring state. He knew to push the nose forward and lower the collective reduce the power and increase your AirSpeed and come out of the vortices and regain ETL. Claude Vuichard knew what to do when in vortex ring state and new when in a high out of ground hover to avoid getting into a descent rate and increasing the chances of getting into vortex ring state. One day though he was flying near the mountains and was in a hover and was being carried by an updraft. He was at a high altitude and the air was thin but he was being carried upwards by an updraft. Suddenly the updraft went away and he fell through into a descent rate the wind changes then was behind him and suddenly he was in Vortex ring State. He was quickly approaching the ground and all around him were obstacles such as trees other cliffs and such things of such a nature. He knew how to perform the regular recovery but the ground was coming up fast and he knew he didn't have time to regain his airspeed come out of the dirty air on time before the ground caught up with him. He was going to hit the ground and made a decision to step over to the right with the cyclic to a softer spot of ground and try and pull up on the collective to cushion the landing. In doing so he realized he'd come out of the vortex ring state and was holding a hover. He immediately pushed forward and continue to pull up on his power to regain lift and enter forward flight. After doing this he realized "there's a better way to recover from vortex ring state" and hence the Vuichard recovery method was created. Did I get that story right?