Betaflight - Fix Wobble with Thrust Linear 

Good stuff! I like the fact you pointed out it was most useful for low T/W quads. Its my understanding its great for whoops with a suggested value of 70-100! I'll be trying this out. Thanks Mark👍

Thanks for the reply. I do have D_min turned off. With stock settings it has a weird side to side wobble that I was able to make a little better but it still has a wobble at certain throttle points. I had thrust linearization on, I think it helped a little.

Great stuff. Will try this out soon. I'm running 24kHz now on my quads with 4.2 to overcome the wobbles, but highly prefer to run 48kHz

Great will try this as well thank u so much for ur work to teach and show us this information.

You got a new patreon ;) Thanks for all this works

you´re great dude! huge thanks for your content!

@UAV Tech you have a edit issue, where you say the same twice, and funny awkward silence :D thanks so much for all the effort :)

Hey Mark, this is awesome. I'm glad you've done a video on this feature because I started using it when it first came out in 4.0 and IMO it really improved the performance of all my 5" quads. But at some point I upgraded to 4.1 and found I was getting low throttle oscillations which went away when I turned off thrust linearization. For some reason I had also disabled TPA (by setting tpa_breakpoint = 2000) when I enabled thrust_linear = 50 (the recommended amount on the original pull request). But I noticed in your video that you never mentioned disabling TPA, and for the life of me I can't find where I got those instructions from. Interestingly earlier this week I discovered that my best flying quad still had a thrust_linear = 50 (with TPA enabled) config! That may explain why I thought the tune was so perfect. So, is thrust linearization a replacement for TPA or do they work together?

thanks for another great video!!!!!!!!!!

Sweet. Ive been employing thrust linear of 25 to arrest throttle chop wobbles when using 48khz... Works well!

Utterly brilliant, can't wait to try this on my 7" bobble issues!

Nice content! 👍

Hay haven't tried it yet but sounds reasonable! Fyi I was lucky enough to stumble apon this help by looking up desinc. It may help your views/ help others who bought an overproped quad/ installed 4.2/ by giving a more generic title/ link to your Info, like quad wigs out at WOT wide open throtte or something. Thanks tho! Very helpful!

Thanks for the great video, would you have any idea(besides me being horrible at tuning) why my quad flies great on BF 3.5.7 but is pretty wobbly on 4.2.2 with rpm filtering?

BF Whoops like 50, FWIW. Another great Silverware feature!

great ! dose it overwrite the TPA? it's like curved TPA basically? that can adjust the curve

in one part of the video you talk about over prop. Can you do a video please on how to choose the "right" prop please? if that would be possible. thanks

Just smashed the like.

Awesome!

Hey Mark, I am having that issue 6:43, where you chop the throttle and get that wobble on pitch axis. Its very pronounced when you do power loop where you chop the throttle and bring your pitch stick to center.. i get that bobble in th pitch axis. I cant get rid of it. Need help, thanks.

Has the function that generates correction been updated? Specifically if I’m reading correctly the function is curvilinear with the inputted value acting as a curvature constant rather than a scaling term. The APC data on the other hand (and the 5 inch quad response) suggests a sigmoid function, maybe a fixed one that is scaled? github.com/betaflight/betaflight/pull/7304

Do you post the video of the nose dipping on RU-vid or only on patroen?

your default starting tune post you said 25 right? I have 3" and below

Hey Mark, great video..Thx for the help. One question...I am running 24 kHz...Is it ok (safe) to use with 24kHz or i should change pwm to 48 khz....Thanks

Right now I'm using dynamic idle and a very high min throttle percent to fix the bobble issue. Would you recommend I turn the percent back down and try this instead?

Interesting technical insight as always! Forgot to cut that transition? xD 6:47

I went to betaflight 4.2 to test,and ever tune and filter setting i get hot motors. I am using the radix li. I went back to betaflight 4.1,and all is fine. Is there something new I am not doing.Or is 4.2 not stable yet. Thank you for all you do for this hobby👍

hi mark i have put your preset in the gt369r and i am getting a fluttering noise any help would be greatly absorbed thanks

ALRIGHT......thats my que to click like ;)

finally!

Does bf 3.5.7 not have thrust linearization ?

What does "over propped on the motors" mean?

lols that one down tick is from Kevin at Emu

👍👍

Shit I did the Thrust linear 25 but i also raise tpa .65 to .5 and breakpoint down to 1250 where wobble oscillation started. wonder if thats too much doing both. its Rekon7

Hi Mark, didn't thrust linear exacerbate D term grinding at low throttle?

LOL I'd like to join your patreon but no visa card.

If I'am using a taranis xd9+ running crossfire shot newst FW but I have been running a older open TX FW would this effect my flight characteristics?? Or would it not sense I'am using crossfire shot?? I've heard that as long is I'm using crossfire it wont make a difference & doesn't matter what version open tx i'm using!! Asking because I was watching rc smoothing video you produced about a year ago & u didn't mention what I'm asking now!! On BF 4.2 if I run rc smoothing under receiver tab 50% flys good not perfect but really good compared to if I leave it at stock 10% I get so much bubbles & stutters!! I even checked my smoothing under cli when it's at 50% all the way max & it's 6.677 latency I haven't checked yet with it turned to stock%10 yet!!

You didn't show it...

👍👀🇭🇷