Betaflight 4.1 RPM filter best settings to kill propwash 

In Betaflight 4.2 they changed the LOW MEDIUM HIGH setting for Dynamic Notch to a "max Hz" setting. This video tells you to set the Dynamic Notch Max to LOW. The equivalent setting in BF 4.2 is 350 Hz.

It is my privilege to learn from and work with Chris. He (and the other maintainers--Mike, Bruce, jflyper, AJ, Joe) deserve some long over due recognition from the BetaFlight community for his tireless commitment to improve BetaFlight.

People will believe that is the best settings for your own quad, but not true, different kwad setups, different settings, your tutorial just a great start point for people understand. Thanks for sharing one more time your great work.

I'm a powersports tech. I've been watching you sir, steele and uav f. 2 months and I still haven't flown yet but I'm 80% done with my first build and thanks to mostly you. I should by tm have a nano that I still need to Sauder a reciever in and simulator. I feel like a kid b4 Christmas waiting everyday on the mail.. I just wanted to say thanks for the video. Like I said I'm a powersports tech and understand give and take very well. Most informative video I've found so far and I haven't even flown yet.

When is BF going to put out a pilot filter so my skills look better?

I'm glad that this gives you videos to make. I am also pretty exhausted by then needless complexity on top of needless complexity that has been added to the flight code over the last year, maybe 18 mo. The things like I term relax, feedforeward, d term setpoint, gyro notch filters, are all superfluous. The problem I have with all this comes from the lack of necessity. It just isn't a big enough improvement to validate the face slamming into concrete ordeal that is attempting to decipher the tool-tip language to learn these new settings, and what to do with them. If they were written by someone who has ever had a conversation with a human being this wouldn't be such a problem. The way things are being detailed now, you have to just move the settings around and hope for the best. That is a problem when the result can be the destruction of something so deeply personal, precious, and expensive. I am not willing to go through those "fire and flame" ordeals every 4-6 mo. I have to say, when a new feature comes out, and whoever made it obviously can't form a coherent sentence describing the purpose of their work, I assume it's probably not that evolved of a feature. The next few weeks are awash with RU-vid videos where people TRY to make some kind of sense of the new feature, and make some intelligent attempt at utilizing it. Comments about horrific quad destruction are sprinkled throughout the community, in the wake of a nonsensical paragraph of unintelligible, real world example free, blather that suddenly appeared in the configuration, that we are FORCED to deal with. Most people just ignore it and hope for the best, not due to a lack of interest, or enthusiasm, or intelligence. Typically quite the opposite, most of us are full of "stoke". The problem is the tool-tips. Without any meaningful information about the new feature, we are at the mercy of people who have quads to burn, who shakily inch their way out the diving board and give it a try, with one eye closed, and a healthy, informed fear of the unknown they have been thrust into. If there were real world examples, as well as the labyrinthine, obtuse garbage that we get when we mouse over that tiny question mark we would be able to USE them. I am not even hoping to be able to utilize something well made, that brings me to a new level. I have lowered the bar to "God I hope this doesn't ruin my hardware". For all the effort that must go into writing this code, someone needs to be able to articulate the new features in a usable way. I volunteer. If you are reading this, and you are developing new features, and ppl have NO IDEA what you are talking about when you tell them what you are doing, and the implementation is consistently a problem: hit me up. I can, and will, listen to you, ask you meaningful questions for clarification. I will then translate that into a tool-tip that can be used by someone who is not in the room with either of us. Please. For the love of all things flying, please.

You have gotten so much better at flying over the past few years!!! Nice job

YES! This is the video I've been looking for! All the other BF filter videos have one thing in common - "tuning" already great quad. What can you teach using that? No example, no real improvement - the difference might be for the pilot, but not perceivable in video. Taking a problematic quad and showing real difference even in video - that's what I was looking for. Again, thanks for this.

Hi Joshua. That was some of the best flying I’ve seen you do and with as you say a “troubled quad”. Thanks for testing and sharing you do so well. I have successfully put 4.1 using JESC on my Diatone GTR349 and Tinyhawk Freestyle quads. 👍👌🙏

Thanks for showing us the proper way to trim trees.

Very good explanation of the settings, I was able to get my GEPRC Rocket flying beautifully, ridiculously little prop wash without guards and said very tight rpm filtering. It's really hard to believe how well it handles wind. Thank you.

I have similar filter settings after testing for the last few months. Sliders all the way to the right (2X), RPM enabled and harmonics at 3, dynamic notch at q=200, w=0, LOW and min hz at 100. I used to disable D_Min but have had better results enabling it and raising the min to about 75% of what it would be without and setting the max about 15-20 higher than without. The other change I make from 4.0.x are raising P quite a bit.

Just did a 1 minute flip flop test and my goodness the first thing I noticed was the sound! My motors are rippier and crispier. Also motors are cooler than on 4.0.6 and smoother. Running Talon F7 8k/8k Dshot 600 on 6s with your exact settings. Thank you Bardwell! I'm gonna trade one of my $2 recurring Paypal Payments in for your Patreon sub cause you deserve it.

About done. Best it's ever flown. Man this new t motor f55 pro 2 f3 mcu version does not like high PIDS! I'm in the 30 range on roll. Was getting ridiculous bounce back. It FF is hard to tune also. Anyhow I'm extremely grateful and could just give you a big old kiss. So happy after a couple days none stop of tuning Learned something today for sure! Much appreciated

Hi Joshua, I've just tuned my Wizard X220S (almost 3 yers old!!) And it flies like charm! Thank you a lot!

I am adjusting back to 3 from 1 now. Your flying is getting really good. Awesome information here thank you Joshua.

Ha! Best part is where you hit branches and keep flying with bent props. That's where the rpm filter truly shines.

Thank you for doing the stupid things like turning off most of the filtering so i dont have to test it for myself :p

You have a awesome home and yard. Extremely grateful for these informative videos

Amazing playlist about 4.1! Really appreciate as I’m quite new in this hobby and thanks to your videos I could upgrade to 4.1 and setup all important things we would never know without you Joshua:) I’m struggling with similar soft wobbling when flying in straight line or falling down after loop.. did you figured out how to get this fixed? You called this “bubbling” , “soft twitches” and almost said twice in this video what it can be but didn’t finished sentence hehe

Like everyone is sayin - one of ur best byard sessions ever!

I love your videos. How in the world did you get out of that tree? I remember watching you a long time ago, when The flamewheel 450 was a big deal, And flight test just started up. David wendinstall was building tri copters...... and on and on and on. The yuneec q500+ was a all the rage. Your flying has progressed leaps and bounds, Good job Joshua! Thanks for all your hard work..... I learned something today..... And Subbed.

Btw that UAV-Tech performance filter tune is a little outdated. I believe he said in a recent video that instead of using a single BiQuad you should use two PT1 filters set to values that add up to a similair latency. This will reduce the noise at lower frequencies more than the BiQuad.

I personally like to look at pid tool box to check my filters. And you can check to see how many harmonics you have. I have only ever had 1 in all my quads so far.

A lot better that is impressive. I that's a great video to show how RPM is worth doing.

All the features in BF are tuned to work together, turning off Dmin means you have to adjust a lot of other stuff to "balance it out again" same for I-term relax for example. To get the last few percent of performance, things got really complicated. But the everting is still exposed to the user... And you really need to know what you are doing to have a good result. The sliders are the first step in providing an alternative, they change multiple settings in a promotional way, so you don't have to understand every little detail.

Is the idea to try reduce the filters as much as possible on each build? I've just setup rpm filtering in BF4.1 on my brand new build. It fly's great. But is the idea to keep moving the filter sliders as far right as possible? Or do you just accept that it flys great and don't think too much more into? Not sure how far into the danger zone I should go. My only gripe is I still have a hint of prop wash I want to get rid of and my sliders arnt in the warning zone yet. Cheers, and great work!!

Great comparison and explanation JB. I haven’t tuned betaflight in over a year lol. Heck I still run 3.2 on my hawk 5 but I’ve got it tuned perfectly and have memorized my pids for the 3 differentprops I run on it for racing and freestyle. But I’ve got the buzz and have been wanting to move it up to 4.1 and start playing with it. Looks like BF has gotten more complicated but easier at the same time lol. I’ve just been running fl1 the last year and it works for me but now it’s time to venture out at least on my freestyle rigs. Maybe one day I’ll try it on my racers but for now ima leave them with falcoX since it’s working so well for me. I’m also working on 2 freestyle rigs now both are actually Flightone but ima have to put bf4.1 on one of them and do a side by side comparison soon 👍👍

Thanks for that video! 4.1 with RPM is still the best until now. My 3" has a lot of propwash witt 3.5.x and 4.0.x. Now its way better! My questions are: Do you recommending your Dynamic notch settings also for small quads? Because the tuning note and mouseover in configurator says for small quads, set it to high (you say low in your video). Do you also switch D-min completely off in 4.1? Thanks for a comment, best regards!

It’s crazy how big a part psychology plays in all this lol you are flying the rpm filter quad so gracefully meanwhile the others just slamming full throttle into propwash back and forth 😂 (I do the same exact thing) HOWEVER; personally, I didn’t really see a difference both had that wobble on high throttle moves both had that yaw p gain propwash thing that all new bf has.. I guess the rpm filter can take a beating but so can older betaflight.. Obviously just my opinion.. either outcome this video is important to show what 4.1 can or can’t do.. I’m gonna stay away for now.. at least as long as my curiosity will allow ⏰

Nice !!!!! I have always wanted to ha e the freedom to abuse a quad copter trying insane tricks !!!!. That's gotta be fun!!!!

Cool video, thanks for putting out useful videos everyday, keep it going

@JB drop your anti gravity to say 2 and see if that fixes the hunting in a straight line

Hello Joshua thanks for the vidio and look where you are 128000 suscrived its realy graet you are the Drone Master !!!!! And i have seen you from the first day and thanks for all your great WORKS . Best regards from Germay :-))))))))

Oh ... I am not going to learn something today! 😉... Great video and I did learn something...

4:09 For a split second we see his rates. I'm going to try those on my kwad.

The sound is pretty awesome love it fantastic

As one was paying attention, default value of Gyro Lowpass 2 Cutoff frequency is default at 500 Hz after flash. Moving the Gyro Filter Multiplier slider from default to low and back sets the value to 250 hz. Bug?

its sortof a dissapointment with all the 4.x releases those wobbles and bobbles, only firmware I ever see have yaw wobbles, even though it feels great and the flight feel is awsome, but when you look into your hd footage its just wobbles all thay way, specially when going 0 throttle, every time wobbles :(, love the idea of rpm filter, and it seems to be working great, maby its something else in 4.0 thats creating those wobbles, but for now I'm back to good old helio board with super old firmware, but its just sooo much more smooth in the hd footage.. :s even though it feels sloppyer when flying... :S, thanks josh for the video, plz let us know if someone finds out why those wobbles are there....

does this apply for micros? can you do a pid configuration for micros/toothpics etc?

Feeling a little Skitzo style on the last pack

Great video! I'm pretty new on fpv as well as in building drones. I do really like your 4.1 playlist! It's great. Question please? Can you explain why in the filter you did you PT1 rather than BIQUAD? I have also tried pid adjustment using adjustment setting in BF4.1 but it doesn't work. Are you doing any video on how to tune pid on 4.1? Thanks for your awesome job!

Hey bardwell, i noticed that you were using the pyrodronef4 board as i am but how come your tasks are at about 26%? when i did exactly what you did in the video, my task max load was up to 40-46% (i have two different pyrodrone f4 boards. the 46% is the v1 and the 40.6% is the V2.3). what else did you do to make it down in the 26% area? did you overclock?

Thank you JB for this video can you make a video on brushless whoops using BF 4.1 ?

It would be interesting to see a similar comparison between BF versions on a good quad, that flies well, even those have propwash. Like you said, the one you were flying had some vibration issues that were noticeable throughout the video on all BF versions. I just want to see how good the propwash can get on a clean, well flying quad with the latest firmware and i feel like you havent shown that yet.

That was wicked ! Have to tried on 3 inch tune?

Absolutely 100% yes

Can I use these settings on 4.2 development? I did on my SiliyX5 and it really flies great now. Thanks for the knowledge and happy holidays 🙏👍

Pretty impressive results, Joshua! Fantastic! 😃 What frame is that?

I'm not seeing much improvement even with the RPM filter. The propwash is better, but I still get a lot of vibration in my video and the spectrograph isn't showing much noise.

Hi Joshua. I noticed on 7:31 timeframe specifically on D Term Lowpass Filters section, your "D Term Lowpass 1 Filter Type" was showing BIQUAD. However, when you disabled some settings, the BIQUAD setting disappeared and got replaced by PT1 right after you clicked "Enable Sliders" button. What is the correct setting?

newbee question: why is low filtering making the motors hot? and what exactly gets filtered? do you have a video on that?

Thanks for so many highly informative videos. I'm fairly new to the hobby, and you have really helped me advance quickly... I'm hoping you can help me with a question. I set up my cidora for 3d flight, but was getting horrible propwash with the master 3d props. I'm still on betaflight 4.0.4. Followed your filter instructions in the beginning of this video. Turned off all filters, set d term lowpass1 dynamic min and max cutoff to 60 and 175 respectively, and disabled d min... now its flying incredibly, buttery smooth. But it feels like it lost a bit of power, and my battery drained much faster than usual, but the motors did not get hot... is it normal to lose some punch with less filtering? Or am I missing something here? Any advice would be very much appreciated

I have a question. What should I adjust in my pids to get rid of bobbles when I punch the throttle? when I get to the max rpm of my 6 inch I tend to get some oscillations but really its trying to solve the mini bobbles when punching throttle

Hey Joshua - great video. I have a 7" that was always a problem quad. I moved it to a stiffer frame. Helped a bunch. Then did the upgrade to 4.1 and added RPM filtrers. Followed your instructions. What I am noticing, as I move the sliders for filtering toward less filtering, my propwash gets better, but I am seeing jello slowly introduced each time I move the sliders down. Motors are cool. Is this expected? Do I need to move to pid tuning after this to get rid of jello? Or accept the propwash? No matter what, great series. This thing flies better than ever before.

Mr. Bardwell, I am confused why you abondoned your traditional method to measure propwash handing (back and forth across the lawn) once you flew with BF 4 .1. I get that prop wash handling is empirical and subjective but for someone who likes to design more controlled tests this one was very flawed. Anyways love your videos!

So basically the first step is move the line to the right and when motor became warm/hot start with the PID. But at this point what you suggest to do with pids sliders?

Does this work on whoops aswell? Because i upgraded my mobula 7hd its board and would love a little more stable footage 😊

thanks JB for the explain. 👍

Thank you again for this video!

Nice - turtling in the vid. Never actually seen it work!

Should I lower filtering to reduce propwash or move with the pid sliders ?

Have a look at UAV Tech: Joe Lucid made BF 4.1 with RPM filters and VTX Tables available on F3 Boards with their performance edition. !!!!!!!!!!!!!!!! There are so many F3 boards out there and they still have life in it.

Hey josh is that the hyperlite vert freestyle 2 frame?? I have The same frame but not finished with the build yet. Great video I'm learning lol.

Do you have any recommendations to get rid of the "jitter"/vertical vibrations seen after setting the optimal 4.1 settings? I'm having the same.

Ctzsnooze 👑

Amazing freestyle fly ;) G! J!

What do you suspect is still causing the bobbles in the final flight? Also, would this make the '6s on 4s motors' challenge easier to achieve with the FC knowing the output RPM or am I way off track?

When I connect to betaflight and click on rec tab the indicator bars are blank ,rec is bound Spectrum ar7700 ppm on a wizard 220. normally when i'have connection problem I'd still get the bars???? Still a newbe after 4 years.

i thought it was just my quad when i set my gyro harmoncs to 1 ...switched it back to 3 but yet to test it ..im excited to give it another try now, i had some strange video noise last time even with caps on the escs

It seems like 4.1 and 4.2 all are provide quite crappy flight characteristic unless you go and tune and tune and tune, no? )

What audio settings do you run on your gopro josh?

what kind of frame is this kwad in the video?? I cant seem to figure it out...???

Hi ! Can you give me the parameter pid betaflight? My plane uses 2207 2450Kv & Mamba F405 MK2. But they suffer from tremor and propwash, I'm using betaflight 4.1. Thanks

Did you leave on the d min on your 4.1 set up with rpm filtering? What's your pids not filter set up but your pids on 4.1with rpm ?

What is it about that quad that was giving it poor flight characteristics in the first place? Was it the condition of the motors, the FC, or combination of props/motors/frame?

Stupid question time. Can I use a newer version of betaflight than what my fc came with? Do I have to flash my fc to the newest beteflight? I’m running 3.5.5 I downloaded when I got my mobula7 and never updated. I’m now flying a board from an eachine x140hv in a different frame and having random roll twitches out of nowhere. That’s why I am looking to use a newer version of betaflight now.

Why my MAMBA F405 mini MK2 dun have a Gyro RPM filter option :(

Do you think this would work for whoops?

I'm testing it but its going to be hard to beat the no filtering setting on 4.0

Great video thank u JB.

Appreciate your work very much :)

do these settings apply to all types and types of motor? or are there some special tricks ... for example motor sizes 22xx or 11xx ... 14xx-18xx..etc ...

Hey what kwad is this? You flying and tuning here? Is it a vert freestyle? Thanks for the info peace

Merry Christmas JB, I have all premium components on a slam nasty frame. I keep lowering filter Sliders down. I'm at 1.7 on both. Everything seems great. Cold motors. Should I keep going?

what was the frame in question?

Have you given up on the two AXII "Stubbies" you used to use on your RapidFire? You've had a directional antenna on your last few videos.

When you do stuff like flying backwards through the trees towards the fence, are you just guessing or have you done that so many times you know where you have to be?

Hey Joshua, the vibrations on the first 2 flights... Are they from high Ps? Or am I wrong? (I'm asking just to see if I'm diagnosing it correctly.)

Keep saying I'm add the rpm filtering update and still havent..

should you move filters left if you get flyaways from the start?

Thank you!

Question? Installed 4.1 and flashed regulators 32.7. But sometimes when you connect the battery, the motors do not sound like that, the music is mixed. This is a normal phenomenon. You have to reconnect the battery three times four synchronous motors sounded. Regulators 32 Bit Holybro Kakute 35A. Matek F405 STD

Great show

4.1 or 3.75 for toothpicks?

I want to turn my filter down more but hesitant. Anyone else go below 1.5 or lower and experience issues?

Oh my god that intro killed me! lmfao!

Hey joshua why you dont try that problematic drone with EMUFLIGHT? Its really working well, just default PID and filter and ready to fly, i would advice you to try it, i think is going to be even smoother with that

Would a dual gyro f7 have any benefit in terms of tuning? Maybe it could perform better with no rpm filters, since the dual gyros are supposed to eliminate motor noise or something like that? I have no idea what I’m doing but I’m trying to tune a dual gyro f7 fc to work well with 4.1

I'm literally having the same micro jitters and bobbles with these recommended settings in 4.1 when flying straight, wonder if its something that can be tuned out.