Rotorflight 2 | FULL SETUP from Flash to First Flight w/ Filters | RadioMaster NEXUS

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  • เผยแพร่เมื่อ 29 พ.ย. 2024

ความคิดเห็น • 122

  • @Johnny31297
    @Johnny31297  หลายเดือนก่อน

    IMPORTANT NOTES:
    If the manufacturer of your helicopter airframe has not published values for CW and CCW tail deflections, please refer to the Rotorflight website for calibrating your mixer instead:
    www.rotorflight.org/docs/Tutorial-Setup/Mixer#variable-pitch-yaw-calibration
    For the total blade pitch limit, the official advice differs from my method in the video. Find the official documentation here:
    www.rotorflight.org/docs/Tutorial-Setup/Mixer#total-blade-pitch-limit

    • @corionisme
      @corionisme 7 วันที่ผ่านมา

      How do you have a 4 way switch on AUX2 48:47 ? when I set 1-4 range It jumps from 1 - 3 - 4 (tx16s, attempting to get an M4 Max up and running)

  • @baxbanni2226
    @baxbanni2226 6 หลายเดือนก่อน +5

    You are a real expert on all this stuff. And also on presenting it comprehensively. Good job. 👍👍👍 My next heli will definitely be equipped with a Rotorflight or Nexus FBL.

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      Thank you very much, greatly appreciated! Enjoy Rotorflight! 🤗

  • @rickhayes
    @rickhayes 6 หลายเดือนก่อน +4

    AMAZING video Jonas!! Thanks SO MUCH for posting this!! The Nexus is a beautiful piece of hardware and this DEFINITELY takes a lot of the mystery out of it!!

  • @R3AnThRaX
    @R3AnThRaX 11 วันที่ผ่านมา

    Jonas, Excellent video! You are an awesome trainer. Easy to follow and I was able to setup my Heli in less than an hour and a half. The one thing I ask of you is to do a video on how you have setup your radio. Specifically how you setup your Flight Modes or BANK switches for 4 modes. If you cannot do this quickly as I know you are very very busy. Just export your Model and have a link to download it. Everyone can extrapolate what is what from that. Please!

  • @RubenRC94
    @RubenRC94 6 หลายเดือนก่อน +3

    This is a lifesaver. Im getting a m4 MAX and was in doubt between a brain2 or the new nexus. You just made the choice real easy!
    Edit just watched the whole thing. I read the online manual already. And you basically confirmed what I tought. Some. Learning curve of course but very doable. I don't see all the fuss about it being impossible in some places.

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      People are scared of learning new things, even if they are significant advancements over existing technology. 😂

    • @ryanrekz7744
      @ryanrekz7744 3 หลายเดือนก่อน

      Ive heard it can be very finicky too finetune from some people I know who have used it

    • @RubenRC94
      @RubenRC94 3 หลายเดือนก่อน

      @@ryanrekz7744 I had 0 experience with it but didn't find it too bad. I did take some pids form the other video from Jonas. Started a little lower as a baseline and worked from there. My filters and pids came close in the end but are a slightly different.

  • @taumelscheibe5948
    @taumelscheibe5948 6 หลายเดือนก่อน +5

    Thanks for the explanation.
    The part about filter tuning is particular usefull for someone coming from classic FBL units.
    Just went out for a few tuning flights, now that it finally stopped raining.

    • @stevebarrow3042
      @stevebarrow3042 4 หลายเดือนก่อน

      How did you go with vibration tuning? I am wondering if the values Jonas uses is enough and bypasses the need to 2-3 minute hover and analysis of the logs? Did you look at the vibration log after flying?

    • @taumelscheibe5948
      @taumelscheibe5948 4 หลายเดือนก่อน +1

      @@stevebarrow3042 Taking filter values from another heli is probably a bad idea. Your heli could start resonating if the q-values are too high for your particular model.
      The 2-3 minute hover is only for the first flight, to validate the basic setup.
      For fine-tuning i did the following:
      - fly continous flips for 5-10s
      - check vibration log,
      - increase Q-values by 0.5-1.0 if there are no vibrations
      - repeat
      if you see vibrations on a certain harmonic just lower the Q-value for the corresponding filter.
      I stopped tuning after 5-6 flights, so technically my heli is still over-filtered. But thats good enough for my limited skills.

    • @stevebarrow3042
      @stevebarrow3042 4 หลายเดือนก่อน

      Thanks mate.

  • @MikeG4936
    @MikeG4936 6 หลายเดือนก่อน +3

    YES!! I'm just about to swap 2 rotorflight units into my 700s, this is extremely helpful!!!

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      Nice, enjoy!!

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      @@andyMSH700 You now have a tutorial on hand that will get you in the air 🤝

  • @pab908
    @pab908 6 หลายเดือนก่อน +3

    Thanks a lot, greatly appreciated! Looking forward to the tuning video - but no pressure 😅

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +2

      Haha that will take a bit, I first need to figure out how to record a video at the field, then I need weather, no allergies, time... 😂

  • @scottnortman
    @scottnortman 4 หลายเดือนก่อน

    Thank you Jonas for taking the time to make this excellent video! Appreciate the attention to detail...

  • @dto80
    @dto80 3 หลายเดือนก่อน

    Great video Jonas, thank you for taking the time to do all this. I look forward to the pid tuning video 👍👍

  • @scrc511
    @scrc511 5 หลายเดือนก่อน

    Wish me luck Johnny 😂 I was able to setup the nexus to the best of my ability and with a lot of help from your informative vid. Was able to set the rates in correspondence to the aux channel assigned from my 16IZ. Wish me luck, maiden soon. Thanks again.

  • @scrc511
    @scrc511 5 หลายเดือนก่อน

    Nexus all setup with my 420 Raw, thank you so much for your informative tutorial. I left alone the Governor for now, hopefully it’s all good with the setup.

  • @nfavor
    @nfavor 6 หลายเดือนก่อน +2

    I'll be getting the FlyDragon tomorrow. This will be a huge help!

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      Enjoy!

  • @n8lbv
    @n8lbv 6 หลายเดือนก่อน +1

    Oh man!
    LED strip support will be fun.
    Hope to see it added.

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +3

      It's already in there! Just nothing I am using for 3D helis.

  • @raymhuang
    @raymhuang 6 หลายเดือนก่อน +2

    you are awesome to make time for this.

  • @tyran370
    @tyran370 4 หลายเดือนก่อน

    Got myself a Nexus for the RS4. Just working down the list of settings it has been self explanatory, but the part about filters was very useful.
    Now I hope for a video about how you arrived at those pid tunes. It's the only thing I'm not really sure about where to start and what to look for.

  • @VertoZavr
    @VertoZavr 20 วันที่ผ่านมา

    Thanks for the video! Very useful!

  • @heavyjohnny
    @heavyjohnny 5 หลายเดือนก่อน

    Jonas Thank You so Much for the set up, Big Help! I'm hoping you can do a deeper dive on the black box. I have no Idea how you came up with your formals to get RMP and I dont understand what you were using the filter to make adjustment. Please more sir!

  • @lulafpv6435
    @lulafpv6435 6 หลายเดือนก่อน +2

    Thank you so much, Amazing, waiting preorder for get it 😍

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      Nice, enjoy your Nexus!

  • @TakaoAirH
    @TakaoAirH 6 หลายเดือนก่อน +5

    If this configuration software is translated into Japanese, it will be the best selling Gyro in the world.

  • @williamtam6732
    @williamtam6732 6 หลายเดือนก่อน +6

    Can you please provide download files of your Rotorflight 2 and EdgeTx setups? It will be greatly appreciated.

  • @stevebarrow3042
    @stevebarrow3042 4 หลายเดือนก่อน

    Great video thanks, loved the gyro explanation.

  • @will_how
    @will_how 5 หลายเดือนก่อน

    What a fantastic tutorial, thanks Jonas

  • @andrewcarey4841
    @andrewcarey4841 6 หลายเดือนก่อน +1

    Great video Jonas, very informative. Can you do a video about setup a nitro engine with this system. Particular in relation to setup the radio and governor

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      I have not owned a single nitro heli in my lifetime, unfortunately I will have to pass on this one!

  • @ericcoker8784
    @ericcoker8784 6 หลายเดือนก่อน +2

    Thank you for the update! Kinda new to Heli stuff and learning to fly. But this Rotorflight is awesome. I fly tiny whoops and other quads. I understood 92% of everything mentioned. BetaFlight has a "presets" tab that takes away some of the guess work (gets you real close to a good tune) for tiny whoops, micros, and all other sizes of quads. Do you think this is possible? 😊 This would be awesome for OMP. Having several different pilots tunes for all the OMP helicopters this FC could fit in would be awesome. Once i get the basics down, I would love to drop this in my Blade Fusion 270. Looks like it might fit. I would say good luck, but Rotorflight, OMP and RadioMaster are gonna take over in the coming months, just like ELRS did!

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      Sure thing, if you know your way around Betaflight, Rotorflight will be no problem for you!

    • @ericcoker8784
      @ericcoker8784 6 หลายเดือนก่อน

      @@Johnny31297 you guys are on the right track. BetaFlight was a lil scary at first, but, as more manufacturers have this as an option, RF will become easier to do. ELRS will do wonders even though Heli pilots won't need the range it offers. The ELRS discord has helped me out way too many times, great people!
      In the future, hopefully they can shrink the tech down to fit OMP M1? Or Goosky S1?
      You are the main pilot for OMP, so a preset tab with your tune, rates, filters, etc would be good too. Imagine having a beginner tune and a spicy tune at the finger tips of your build. Just keep pushing!

    • @ericcoker8784
      @ericcoker8784 2 หลายเดือนก่อน

      ​Update: I purchased the M4. The assembly went fairly smooth. The only weird thing is the servo wires needing to be wrapped around the main shaft assembly...but all good.
      The mechanical tuning per the instructions is good. What could be better? Include a small metric ruler for setting the links. Otherwise, all good.
      All far as tuning, you have done a very good job. Some of the finer points can be found on the Rotorflight website. BTW I copied your PIDs and tuning suggestions. People have to understand that copying everything exactly isn't always true when it comes to the mechanical setup. It will be kinda close, LoL. Anyways, your videos are required viewing!​@@Johnny31297

  • @NathanC-63
    @NathanC-63 5 หลายเดือนก่อน +1

    Can you please make a video showing the TX side of things like bank switching , switch assignment’s, telemetry widgets on Home Screen etc.

    • @Johnny31297
      @Johnny31297  5 หลายเดือนก่อน

      That is absolutely not universal and entirely depends on your transmitter. Just set up the channels the way I explained in the beginning and you're good 👌 Widgets are also just EdgeTX standard tools, but will differ on different radios.

    • @NathanC-63
      @NathanC-63 5 หลายเดือนก่อน +1

      I was referring to the TX16 for me this is my first time setting up booth TX and FBL and since there are booth made by Radiomaster I assume it will be the most used.

  • @diamondt88
    @diamondt88 6 หลายเดือนก่อน +2

    Awaiting your video with RF2 on my M7

  • @Jeffheli3d
    @Jeffheli3d 2 หลายเดือนก่อน +1

    i was about to order one but after watching full video i ll wait for something easier to setup

    • @kajuta240
      @kajuta240 หลายเดือนก่อน

      You should do ikon and spektrum! And pick up a blade while your at it.

    • @Jeffheli3d
      @Jeffheli3d หลายเดือนก่อน

      @@kajuta240 😂

  • @PHIL7303
    @PHIL7303 6 หลายเดือนก่อน +2

    Thanks Jonas, very helpfull

  • @frisos3944
    @frisos3944 4 หลายเดือนก่อน

    Thank you for this in depth video! What packet rate and wattage should i set the elrs connection at? I can go as high as 1000hz on the Radiomaster ranger. Wattage seems to be limited to 150mw.

  • @JSProjects-w5k
    @JSProjects-w5k 5 หลายเดือนก่อน

    Hi Jonas< just recently bought the nexus, however i use spektrum, can you kindly do spektrum setup video. Thanks

  • @wrathofkhn
    @wrathofkhn 4 หลายเดือนก่อน

    Hello, I have been flying RF2 for couple of months now, loving it!
    Recently I purchased a Nexus, was watching your video - noticed on 11:20 about orientation. This is the first time I am aware of it.
    In the past I only adjusted 'First Gyro' until the movement of the heli on screen matched the controller's movement. I never touched any of the options on the first line. My controller has wires pointed at the back, and I have been using "CW 270 Flip" for the First Gyro (2nd line).
    The heli seems to be flying fine - Would you recommend changing only the first line (Yaw degrees), or leave it as is?

  • @scrc511
    @scrc511 5 หลายเดือนก่อน

    Thank you Jonas. Hopefully a video setup for Futaba 16IZ configuration will be available for Futaba users like myself soon. I really want to try this FBL unit for my 420 Raw build.

    • @Johnny31297
      @Johnny31297  5 หลายเดือนก่อน

      Just set up exactly as shown, but with your system's preferred channel order. Probably AETR1C23? Not sure. But it's not hard.

    • @scrc511
      @scrc511 5 หลายเดือนก่อน

      @@Johnny31297 Will do, thanks Johnny.

    • @scrc511
      @scrc511 5 หลายเดือนก่อน

      @@Johnny31297BTW, if I decide to try the Governor in the Nexus, it’ll be PWM then HobbyWing ESC, enter gear ratio and motor poll count, now for the ESC override, on the HobbyWing ESC do I calibrate the ESC first for the high and low end before going to the ESC override for the Nexus high and low end learning process?

    • @scrc511
      @scrc511 5 หลายเดือนก่อน

      Thank you Sir, and I do apologize for maybe asking too many questions on this since I’ll be using my 16IZ. I will be ordering this unit soon. Have to be careful on the servos setup because I set all mine to 760 instead of the 1500 standard pulse rate it came with. I’m using Torq Servos.

    • @scrc511
      @scrc511 5 หลายเดือนก่อน

      @@Johnny31297Thank you, will do our best. I ordered mine a few days ago and will set it up to my 420 Raw.

  • @nikosnikiforakis5119
    @nikosnikiforakis5119 6 หลายเดือนก่อน +1

    thank you very much for your help

  • @helimansam
    @helimansam 6 หลายเดือนก่อน

    Excellent vid Jonas. Does saving the CLI diff and using as a template work between different units if they are all RF2? Say if I set up a Flydragon 722 v2.2 and then dump the diff and upload to a Nexus is that a thing or a disaster?

  • @heavyjohnny
    @heavyjohnny 5 หลายเดือนก่อน

    Jonas, can you do a video on how you set your governor setting to ensure you enter Autorotation when you switch to profile 4. I'm confused because you have to be in the 5% range to enter Autorotation but the Governor settings are asking for head speed. The only thing I can think to do is to enable Motor Override, set the throttle to 5% and record my main rotor RPM. Than enter that number as Full Head speed in profile 4. However, I don't know if how consistent that would be. I'm afraid that if set this way there is a possibility of a surge in the head speed that may cause the bailout to engage.

  • @Mrh168
    @Mrh168 6 หลายเดือนก่อน +1

    Thank you, thank you, thank you

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      You're welcome, happy to help!

  • @tarmovie3964
    @tarmovie3964 2 หลายเดือนก่อน

    Is there a way Rotorflight2 can be used with Jeti Transmitters (with Jeti Receivers or even Radiomaster Receivers) and with full (or even the most important) Telemetrie?
    (Cause i saw something with ReceiverProtocol JetiEXBus in a video)

  • @jackmeoff7339
    @jackmeoff7339 4 หลายเดือนก่อน +1

    How set up idle switch so can do autos without full off ?

  • @nickthenorse
    @nickthenorse 5 หลายเดือนก่อน

    I've got a new TX16S Max Mk2 ELRS + Nexus FBL on the bench, will be testing out on a Protos 380 (moving from Jeti+Brain2 on that particular heli). Jonas @Johnny31297, do you have any thoughts regarding the reduction in precision going to 10-bit with ELRS?

  • @fart3
    @fart3 4 หลายเดือนก่อน +1

    Jonas, thanks for the video. At 29:26 you say the full range is fine on the M4 Max and you don’t adjust the min max…but on my M4 Max on the same setup they reach way past the mechanical limits of the swash/tail. I had to lower the min max to +- 500 for the cyclic servos and +- 150 on the tail servo. What’s the reason for the difference between my setup and yours? As a specific example, the pitch servo will reach the limit of the anti rotation guide at about 50% in the servo override.

  • @atamargo99
    @atamargo99 6 หลายเดือนก่อน +2

    Great video¡¡¡ One question if i want to set up with multiprocol 4 i 1 wich receiver do you recomendable?

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      FrSky Archer Plus RS

    • @atamargo99
      @atamargo99 6 หลายเดือนก่อน

      @@Johnny31297 thanks for quickly answer!!

    • @jeanrochat
      @jeanrochat 6 หลายเดือนก่อน +1

      @@Johnny31297Hi!! It will not work with R-XSR?

    • @RubenRC94
      @RubenRC94 6 หลายเดือนก่อน +1

      ​@@jeanrochat it will probably, but the archer Rs is the new and improved variant

    • @jeanrochat
      @jeanrochat 6 หลายเดือนก่อน +1

      @@RubenRC94 Hi, yes but I have already a R-XSR and I find better to try NEXUS with this one before buying a Ranger ELRS module for my 4In1 TX16SMKII. I also have a DSMX sat which can help doing tests.

  • @Kurt-c8f8r
    @Kurt-c8f8r 5 หลายเดือนก่อน

    Hello, in RF receiver tab if say yaw is in the wrong direction when moving stick where would be the correct place to reverse it so correct values are given in receiver tab for yaw? Thankyou 🤟

  • @frankmoradiellos5275
    @frankmoradiellos5275 2 หลายเดือนก่อน

    Great video

  • @carlhaentjens3548
    @carlhaentjens3548 6 หลายเดือนก่อน +1

    You are a hero!! Thx

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      Thank you!

  • @neohelirc
    @neohelirc 5 หลายเดือนก่อน

    I have the NEXUS on my M4MAX and can fly it by being able to do frontal hover and even rear hover. However, when I swing the tail rudder to either side while hovering, the rudder pitch works, but the tail does not stop in that position and slowly returns to its original position. I assume this is because the head lock function on the rudder is not working properly, how do I set the head lock function?Thanks

  • @NathanC-63
    @NathanC-63 5 หลายเดือนก่อน

    Question of the profile/Adjustments section. How are you able to get 4 profiles when you have it mapped to the 3 position switch (SE). Maybe I’m missing something.

    • @OCDRC-OR
      @OCDRC-OR 5 หลายเดือนก่อน +1

      In EdgeTX, you can assign multiple different switches to control a single channel's value. In this case he's used the "mixes" tab in the radio to combine his bank (SE) and autorotate (SH?) switches to effectively create a 4 position switch on the bank channel.

  • @christian3926
    @christian3926 4 หลายเดือนก่อน

    Hi Jonas, maybe a stupid question, but for a 3 bladed main rotor do I also use the 2nd harmonic on the filter or the 3rd?

  • @BigWillieFPV
    @BigWillieFPV 3 หลายเดือนก่อน

    how are you getting a 4 position switch for profiles on a tx16s, max is 3 position switch? thank you

  • @HugeVictor
    @HugeVictor 6 หลายเดือนก่อน +1

    Will your configuration files for the m4 series be available? Also, when is the Nexus releasing? I don't see it in stock anywhere

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      I will publish them when I find time, but as I said in the video, I didn't even have time to shoot the video itself, so I have even less time to prepare my setups for release now lol

  • @paul_bunyan
    @paul_bunyan 5 หลายเดือนก่อน

    How do I setup my TX16s for the swash to work correctly? I run gov mode and can’t seem to change my ch3 from ch6 throttle.

  • @beddanceking
    @beddanceking 5 หลายเดือนก่อน

    Ive heard you have been able to make this work woth the stock omp m2 esc.how does that work would love to try that

  • @fredvonjupite
    @fredvonjupite 6 หลายเดือนก่อน +1

    Danke für das Video, kommt auch eine Deutsche Version ?

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน +1

      Nein, aber du kannst dir automatisch übersetzte Untertitel einblenden lassen 👍

  • @VipiModel-nk3ce
    @VipiModel-nk3ce 3 หลายเดือนก่อน

    Hi Jonas, please can you tell me honestly which one do you think is better gyro?radiomaster Nexus or Microbeast?thanks in advance mate

    • @MitchelChamp
      @MitchelChamp 3 หลายเดือนก่อน

      I have a microbeast the bail out function cost an extra 130 bucks 100 for software rights and 30 for the programmer

  • @scratchsatriani
    @scratchsatriani 2 หลายเดือนก่อน

    Can it be use on nitro heli?

  • @faredjay261
    @faredjay261 6 หลายเดือนก่อน

    In esc settings, do you set fixed-wing mode?

  • @m.h.6382
    @m.h.6382 6 หลายเดือนก่อน

    Danke ihnen sehr

  • @MaxXGrand
    @MaxXGrand 5 หลายเดือนก่อน

    Hat das FC auch einen Rettungs Modus? Bei missgeschick den Heli zu retten? Woe das Vsabi oder Deamon axon?

    • @Johnny31297
      @Johnny31297  5 หลายเดือนก่อน

      Ist im Video erklärt 🤝

  • @Kurt-c8f8r
    @Kurt-c8f8r 6 หลายเดือนก่อน

    Does the ESC telementry wire come with omp m4 kit or the Nexus fbl kit or am I needing to buy seperate

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      Yes

    • @Kurt-c8f8r
      @Kurt-c8f8r 6 หลายเดือนก่อน

      @@Johnny31297 Yes I need to buy it or yes it comes with kit? 🤔

    • @Johnny31297
      @Johnny31297  6 หลายเดือนก่อน

      @@Kurt-c8f8r You need to buy it ot make it separately. OSHM2074 can be used for the Nexus side, a regular Dupont connector for the other side.

    • @Kurt-c8f8r
      @Kurt-c8f8r 6 หลายเดือนก่อน

      @@Johnny31297 ok thankyou 🤟😁

  • @bluecavemen
    @bluecavemen 6 หลายเดือนก่อน

    is this the same as ardupilot for mission planner ?

  • @nevermind7385
    @nevermind7385 2 หลายเดือนก่อน

    My graph display only shows up to 50hz

  • @Xplanker
    @Xplanker 2 หลายเดือนก่อน

    I'm still using flybars and can fly any styles. These units are gimmicky and fly the model for you, so it's cheating. Says every person who doesn't know what they are talking about. I have the same radio used in this video, and i can't wait to try rotorflight !!

  • @carosworldofficial
    @carosworldofficial หลายเดือนก่อน

    And i was thinking to get into rc heli...

    • @Johnny31297
      @Johnny31297  หลายเดือนก่อน

      @@carosworldofficial This is not something you start out with. Look into the OMPHOBBY M1 or M2, those come in ready to fly sets even 👍

  • @elitecol69
    @elitecol69 5 หลายเดือนก่อน +1

    It's a shame rotorflight 2 cant be configuered or tuned off the TX16S, like Mikado Vcontroller touch.

    • @Johnny31297
      @Johnny31297  5 หลายเดือนก่อน +1

      What? It totally can.

  • @kajuta240
    @kajuta240 หลายเดือนก่อน

    I can't do 10 flips .....or even 1

  • @BGH
    @BGH 5 หลายเดือนก่อน

    subba

  • @simonnagel8916
    @simonnagel8916 5 หลายเดือนก่อน

    Ein Video in Deutsch wäre super

    • @Johnny31297
      @Johnny31297  5 หลายเดือนก่อน

      Automatisch übersetzte Untertitel existieren

  • @gauix7
    @gauix7 หลายเดือนก่อน

    johnㄴr ㅇ ㅓ렵ㄴㅔ...