Love what you're doing. I'm studying mechanical engineering and we just started doing FEM Analysis. I would be very interested in a video on how you set this up. Keep up the good work! 👍

Sent over here by Ciottifpv, subbed! Great visual representation of frame resonance and not too difficult to understand either. Nice 1!😁👍❤️

@ChrisRosser

3 жыл бұрын

Thanks so much for your comment! Stay tuned for more deep dives into vibration and what you can do to reduce it, and get buttery smooth video and cool motors on all your quads.

Thank you very much, Chris, for such an effort and knowledge about drones.

This was Outstanding !!! What a work !

Came here from Ciotti. Awesome analysis. Cant wait to see where this goes!

These resonance modes really do give a good reason to put the flight controller in the middle of the frame instead of locations towards the back! Thank you for all this hard work!

Finally finally finally someone is picking up on modal analysis of quads. I always wondered why nobody realized, that those straight arms are actually a bad idea. Next step: Get the quad's center of weight actually aligned to the center of its turning axes and apply state of the art pwm from the electric car industry to motors…

@Kman568

3 жыл бұрын

Straight arms are a bad idea?

@apair4002

2 жыл бұрын

You do you mean? True x, stretch x style frame?

@rubenvaneupen7327

2 жыл бұрын

pwm?

the floss would be an interesting one to see for frame resonance especially the larger 7"

This is great! Thank you for your work sir! I can only imagine that using real world data from BB on source one frames would lead to perfecting your model and that could eventually take us on a new level of frame designing. Keep it up! Science to the rescue, as always

@ChrisRosser

3 жыл бұрын

Absolutely. If you know anyone who flies a source one and has some raw gyro BB logs please let me know!

@Cloud1242

3 жыл бұрын

@@ChrisRosser If you still need these logs at all I am happy to share. I have been working on taming my vibrations so that I can move on to filtering and eventually PIDs.

Awesome work!

@ChrisRosser

3 жыл бұрын

Thanks Mattia, I'm just getting started...

Please check out the source One V5 as it is a little different arm design an would be interesting how it compares to the Apex resonance performance

Came here from r/FPV. This is very interesting stuff! I look forward to seeing how good your frame works!

@ChrisRosser

3 жыл бұрын

Hey Mike thanks for the comment. Once the design is finished I hope to launch a beta test program for the frame, I'd love you to be part of it!

@mikegrimsley9017

3 жыл бұрын

@@ChrisRosser Wow! I'd love that too. Source one is the frame I fly the most.

@ChrisRosser

3 жыл бұрын

@@mikegrimsley9017 I don't actually own a Source One, I picked that frame because the CAD was available online. Would you be able to send me blackbox logs of the raw gyro data from a freestyle rip?

@mikegrimsley9017

3 жыл бұрын

@@ChrisRosser I don't have a bb log. I got an esc coming this weekend and we're supposed to get hammered with snow but I can get you one after that.

Excellent stuff. Reminds me of the FEA gurus at work... :) Love the fact I know the third resonant mode of my Source One now! :) Great stuff.

@ChrisRosser

3 жыл бұрын

Thanks Chris, I'm glad that frame resonances are in people's minds now!

Very very cool stuff man, LOVE THIS!!!!!

@ChrisRosser

3 жыл бұрын

Love your enthusiasm!😁😁😁

@CiottiFPV

3 жыл бұрын

Thanks man, hopefully you got a nice bump last night, I told all the folks from my stream to sub and check out this amazing video, keep going man, LOVE this shit and we need more of it in FPV rather than all hype train all the time :)

@ChrisRosser

3 жыл бұрын

@@CiottiFPV Thanks for the promotion Ciotti. I'm so glad this is prompting influential pilots like you to think about resonances. I would love to do a little collaboration with you, maybe looking at micros?

@CiottiFPV

3 жыл бұрын

@@ChrisRosser are there any things that can be done to existing frames to damp our resonances that aren't heavy?

@ChrisRosser

3 жыл бұрын

@@CiottiFPV What a great question. Yes, I'm working on a product for this actually...

You are doing God's work, man.

@ChrisRosser

3 жыл бұрын

Thanks mate, I'm glad you're enjoying the videos.

I just stumbled across your videos right before I saw Bardwell's one where he flies your filtering recommendation for his frame. I read somewhere in the comments that you were interested in some BB of this frame. Well I do have some BB but not exactly on this revision of the Source One but the most recent one (V4 HD - the one with the new and wider arms). If you are planning to make a video about this revision of the Source One or if you are still interested in some BB, feel free to contact me - I'd be glad to help out for this kind of awesomely detailed and profound content!

Man, this is excellent! I've been hooked to your videos for three days now and I think eventually I'm going to watch them all. Is there a video where you explain how you know what kind of deformation happen on a given frequency?

@ChrisRosser

3 жыл бұрын

Welcome aboard! I use software to calculate the harmonic response using the principal of modal superposition. Check out SALOME-MECA and Paravis which are software packages I use.

@MarianoCarpentier

3 жыл бұрын

@@ChrisRosser Thanks a lot!! :)

Awesome. I will try and analyse my own frame design now before I get it cut

@ariafpv

3 жыл бұрын

Does it take long to simulate this? Could I maybe send you one of my designs to analyse?

@FalconRadFPV

3 жыл бұрын

@@ariafpv I was just thinking about asking him about it.

@ariafpv

3 жыл бұрын

@@FalconRadFPV good idea. I tried it myself but I don't know how to simulate specific frequencies

Great contribution to the fpv developement, came here also from r/FPV

@ChrisRosser

3 жыл бұрын

Hi Vincent, I'm glad you found this interesting, please let me know if you have any questions, feedback or ideas for further investigations

So glad you’re doing this kind of analysis. So much of the quadcopter related content here is really vapid and rehashed.

@joachimlarsen2k

3 жыл бұрын

This hobby is saturated with people of "authority" who does little more than licking their finger and sticking it into the air. This whole channel is a breath of fresh air.

Hi! I really would like to see the frame resonance of the impulse RC Apex 5inch frame! Great video btw :D

@ChrisRosser

3 жыл бұрын

It's up on my channel now! Check it out! kzread.info/dash/bejne/p2mWtsNxgNyfe6w.html

Great information! I’ve been working on a frame design as well. Would love to share notes.

@ChrisRosser

3 жыл бұрын

PM me and we'll talk! www.reddit.com/user/Far_Humor_420 :) :) :)

@karcherchristopher

3 жыл бұрын

@@ChrisRosser just sent you a note from the same profile name as above.

This is really interesting stuff. I never thought about vibrations in the way that some hurt more than others, and how it can only affect one axis. I've always tried to just get rid of it by brute force. Also, I assume those simulation graphics are a bit "exaggerated" for better visibility of the problem at hand, this would snap the carbon otherwise, no?

@ChrisRosser

3 жыл бұрын

Absolutely right, once you can visualise the vibrations you can really see which ones cause jello and bad flight performance and you can start to design to minimise the bad vibes! The simulations are exaggerated, these vibrations are too small to see with the naked eye but plenty large enough to affect hd footage and be picked up by the gyro.

Really cool stuff, thanks. I noticed one thing which I think is not quite correct. You mentioned a couple of times that pure translational movement did not affect the gyro, but would still increase the jello. In fact, pure translation of the camera does not change the picture because the objects are far enough from the camera: body translational shaking is a fraction of mm, distance to the objects is normally at least several meters. Example of that effect: a steadicam can't affect the translational movements of the camera, but it removes all the rotations and that makes the picture smooth. In practice, camera mounts may, probably, transform translation of the body into rotation of the camera. But mount and camera are outside of your model.

@ChrisRosser

3 жыл бұрын

Thank you for your comment! You are absolutely correct that translational movement would not affect the camera. More recently I have been conducting harmonic analysis that include the contributions from many resonance modes. The effect of other resonant modes is to make the vibrations include rotations even when the primary mode is translational. That is why you can still get bad jello with translational modes. I didn't fully understand that when I made this video. But I'm learning quickly!

Questions about some of this. Wouldn’t a heavier motor dampen some of those frequency’s out? Or vice versa for a lighter motor? Or would it amplify the outcomes.

@ChrisRosser

3 жыл бұрын

Great question! In general, heavier motors will lower the resonant frequencies and stiffer arms will raise them. Damping is not going to be greatly affected by mass or stiffness. In general single bottom plate designs will have less damping and individual arms will have more but it's very frame dependent. This is why some people have problems with a build and someone else with the exact same frame doesn't.

H! What program is that? And what material did you simulate? I thought that carbon is anisotropic material that really not easy to simulate accurately.

@ChrisRosser

3 жыл бұрын

I'm using SOLIDWORKS for this. Composites are very hard to model perfectly but good approximations are available for standard layups 👍

@itsmeRizzG

2 жыл бұрын

​@@ChrisRosser Hey Chris, I'm trying to model my own design in Solidworks as well for a uni project. I'm having trouble finding the elastic modulus for common CFRP's in the 3 dimensions to model it as an Linear Elastic Orthotropic material as well as the yield strength. What values did you use? If you are willing to share how you setup the resonance simulation I would also really appreciate that, although I understand that might be too much effort. While I have the capabilities to have modeled my quad, I am a little less competent in Solidworks simulations beyond static design optimization studies 😅

Old video, but still very interesting, and if you are still reading here, I have two questions for you; first, your thoughts on soft mounting motors. That used to be a popular thing, its been abandoned but Im not sure I know why. Secondly, looking at these resonance simulations, I wonder, would it make sense to add tensioned kevlar wire to create additional triangles, like between two arms on one side or even in the vertical.

Awesome work! Didn't we talk on RCG? Nucleon?

Can you please share more about how you set up the fem analysis for a frame like these? I am a Catia V5 user but this looks like Solidworks? Im very interested because this is top notch stuff! Subbed!

@ChrisRosser

3 жыл бұрын

Set up with weak spring support and frictionless and bonded contacts as appropriate. Sorry for the slow response!

Could you do an analysis of the updated thicker arms of the v4? ;)

Hey Chris, I have the TBS source one V4. I saw on one of your other videos that you had some suggestions for filter settings. Can you do that for the source one V4 please? If you have time.

Subbed... Please post some more stuff!!!! Want to learn about your ideas on how to fix these issues, some design ideas would be awesome, multiple arms heading out to motors for extra strength(cmw bando styles) or separate plates to lock in arms etc... Teach me master!!!!

@ChrisRosser

3 жыл бұрын

I'm working on a lightweight 5in design that has roughly twice the resonance performance of the TBS Source One. I'll be making some more content on this and there will be an open beta for the frame sometime soon. I'm hoping to work with manufacturers to come up with more ways to address these issues because I think they are affecting a lot of people!

Great video! Can you explain why there would be 1 motor/ 3 motors oscillations as you pointed out, when the structure is supposedly symmetrical? Maybe do 30 minutes in-depth video on this topic, I am very interested in learning all the physics behind this, thank you!

@ChrisRosser

3 жыл бұрын

With resonance you will will see full body modes where the whole structure is moving and (usually at higher) frequencies you will start to see modified single body modes of parts of the structure. In this case single arm modes. The three arm mode was surprising to me but resonance is hard to predict. That's why the simulations are so important. I'll put a longer explanatory video on the backlog. Thanks!

@aowi7280

3 жыл бұрын

A bent prop.

@JustInTime0525

3 жыл бұрын

@@aowi7280 I'm asking about simulation strictly, and pretty sure those weren't modelled in.

Please test and compare the CatalystMachineWorks BangGod or Shocker tank...or better yet, both. How do these highly engineered frames perform? Please!!

I'd be curious what level of fidelity this has on threaded joints, which is typically what becomes the validation piece when looking at this, and working off the assumption that things don't have slop, when in reality that affects which modes will actually sympathetically resonate in practice, and which ones will remain relatively damped. Also, awesome stuff, can't wait to see more!

@tehllama42

3 жыл бұрын

Also, this provides me hugely valuable information about troubleshooting individual delaminating arms, the 500-700Hz regime always confused me about what information was there, because it did seem linked to motor RPM bands, but if it is a single arm mode, then that makes an order of magnitude MORE sense to me... seriously cool

@tehllama42

3 жыл бұрын

Other question would be what the shift is when going to 6mm arms on the SourceOne. Quite a few of us absolutely swear by that setup, because it lets us run a single LPF (or sometimes none) along with motor notches, and they fly amazingly well... that is something I'd love to see quantified.

@ChrisRosser

3 жыл бұрын

@@tehllama42 Wow, I was two minds whether to even include those single arm modes. Just goes to show, gotta get that data out there!

@ChrisRosser

3 жыл бұрын

@@tehllama42 6mm arm, I can definitely simulate that for you. I'll stick a video up when it's done

@ChrisRosser

3 жыл бұрын

At this stage not too much fidelity on joints but I plan on increasing the resolution of the simulations in the future to more accurately replicate the joints, it's going to be difficult to quantify damping. But if I can get hold of BB logs I can make an attempt to match the Sims to the raw gyro data. In my experience any slip in joints makes things worse though and most people I know crank their arm screws down super tight but I won't know until I look I guess. Thanks for the ideas!

love it. thanks very much. is there any way we can send you designs to analyze? thanks

@ChrisRosser

3 жыл бұрын

Hey Steve, yes you can get in touch directly on Reddit. Far_Humour_420. Let's put together a project!

I'm designing a 6" Moka gravity lookalike quad with tilted rotors for long range purposes. It would be nice if you could do a short tutorial on the program that you used for your frame analysis.

@larijoona

3 жыл бұрын

@@ChrisRosser I actually have used something like this if not the exact same program maybe 6 years or so ago for optimizing a 3d printed part strength. Didn't realize it could simulate frame resonances too.

@smokeoutfpv4132

2 жыл бұрын

@@larijoona what was the program mate? Firefighting my own design issues at the moment and it would be super useful

@larijoona

2 жыл бұрын

@@smokeoutfpv4132 fusion 360 has finite element simulation functionality

Great stuff, very interesting! I see you're using solid works, are you aware of anything for MacOS that can run a simulation like that?

@ChrisRosser

3 жыл бұрын

Fusion 360 can run on a Mac that would be my best suggestion.

Hello Chris, I saw in your spreadsheet in the video that in the XYZ directions you include what I assume are mass participation factors (the columns look to sum to 1 each). You didn't mention these in the analysis. It appears that in both frames almost all of the mass is excited in very low frequencies and the higher frequencies which you spend more time discussing have negligible mass participation. Could you please comment on whether x y and z columns are actually mass participations and if so why you think almost all of the mass is excited below 1hz? Thanks, Mike

Can you share how you model carbon fiber parts?

Current frame i am using sourceone. I need to change another frame.

Now I really want to see how other materials stack up against carbon fiber when it comes to frame resonance

@ChrisRosser

3 жыл бұрын

Carbon fiber has pretty much the highest specific stiffness of any material so it will be challenging to find a material that can do better. Carbon fiber + damping grease is pretty sweet though....

This is excellent, well done! I have noticed I have been able to remove some of the resonance issues on my micros with good fc soft mounting as well as soft motor mounts too. It doesn’t always fix everything but it certainly keeps the motors cooler. Have you done any of your testing with any “virtual” soft mounts and noted the effects as I would live to see that too.

@ChrisRosser

3 жыл бұрын

Soft mounting the flight controller is effectively a hardware low pass filter so it will attenuate all high frequency vibrations with attenuation increasing with frequency. I've never had much success soft mounting motors. If the mount is too soft it can make things worse by reducing the frequency of certain modes of vibration. If it's a tight soft mount its probably not doing too much in the range we are most concerned about. But I know pilots have had widely varying success with soft mounting motors. Probably worth a deep dive at some point!

@TuccoBenedicto

3 жыл бұрын

@@ChrisRosser Thanks for the reply and I would love to see your further tests on the matter. I have been noticing an improvement on the one piece bottom decks where I generally find the worse resonance issues to be. On 2.5” builds I noted that even a single piece of tape under the smaller 1103 motors made an improvement in the physical testing I was experiencing without, so maybe I got lucky and just shifted the frequency along to a less noticeable place perhaps? I also believe these smaller 16x16 aio are just more susceptible too, but with your testing could get us closer to managing that problem as well! This is brilliant work you are doing, so glad it’s getting properly looked into finally!

@ChrisRosser

3 жыл бұрын

@@TuccoBenedicto Very interesting I should be able to model a thin soft material under the motor. It's hard to predict the effect on resonance in this case, I'll add it to my growing list of projects!

@TuccoBenedicto

3 жыл бұрын

@@ChrisRosser Excellent, thank you, I will look forward to seeing it. My friend and I are making some frames currently and are experiencing some resonance issues as you have shown. Do you have an IG account so we could perhaps do some information sharing and maybe work with you to make and test some of your designs?

@CiottiFPV

3 жыл бұрын

@@ChrisRosser isn’t it impossible to soft mount motors without soft mount screws though? And the screw slamming into the carbon will create a non sinusoidal wave?

This is awesome! did you model the source one frame with 90deg cuts or with filleted edges? I have 2 genuine source one frames that have that as the only difference between them. do you think it would affect the results significantly?

@ChrisRosser

3 жыл бұрын

90 degree cuts and no I don't expect small chamfers on the edges will make any difference in resonance behaviour.

@leadfingers

3 жыл бұрын

@@ChrisRosser If you need any frame 3D models I would be happy to help out! super cool what you're doing.

@ChrisRosser

3 жыл бұрын

@@leadfingers a lot of people have been asking me to model the armattan marmotte. Is that a frame you could model up?

@CiottiFPV

3 жыл бұрын

@@ChrisRosser arm at tan frames are well known to have massive vibe problems mainly because the carbon weave isn’t oriented correctly but I wonder if it’s also design related

@ChrisRosser

3 жыл бұрын

@@CiottiFPV It would surprise me if carbon orientation is the only factor. I agree design is definitely a factor. Single bottom plate frames also have less inherent damping because they have fewer joints so vibes will be worse. I'm definitely doing a video on armattan at some point. I would like to get them involved, do you think it would be possible? Do you know anyone there?

Hi - I have tons of questions for you all surrounding how/where you are constraining your model. Secondly depending on how you are constraining you model, doesn't your matching material choices of the stack grommets weight heavily into your simulation?

@ChrisRosser

3 жыл бұрын

Fire away. I've found that the materials in the stack don't matter too much as they add so much stiffness to the frame in that area even if they are relatively stretchy materials due to the height of the stack compared to the thickness of the plate. I'm using bonded connections for the most part due to the high contact forces and friction coefficients when the frame is screwed together. It seems to agree well with the blackbox logs I've checked. I welcome any feedback on the modelling to improve it!

@zachcarrizales5038

3 жыл бұрын

@@ChrisRosser Hi, I appreciate you telling me about the contact type you are using, but I asked about how and where you are constraining your model from. For instance, are you constraining your frame to the mount points on the FC or are you constraining your fc to your frame by way of structural load constraints on the fc screw holes - this changes your reference point. One of my hopes for my investigation is to decide the feasibility of hard mounted flight controller and esc's. Also what software are you using to run your analysis as I am just curious as to if simulation software has gotten better for composite materials since my undergrad (they weren't fantastic in 2015-16) as they mostly treat composites as isotropic instead of quasi-isotopic (which admittedly most carbon fiber used in the FPV frame industry isn't because it is more costly or people can't tell the difference).

@ChrisRosser

3 жыл бұрын

@@zachcarrizales5038 Hi Z, the model is supported by weak springs in the simulation so both the flight controller and frame can move. So there are no fixtures or other constraints. I am using Solidworks simulation to run this analysis.

@zachcarrizales5038

3 жыл бұрын

@@ChrisRosser Where did you put the springs; under the bottom plate on the frame?

@ChrisRosser

3 жыл бұрын

@@zachcarrizales5038 Its a setting in the solver used when you want to model flying objects that aren't in contact with anything fixed. It allows rigid body modes to solve.

How does the simulation relate to the real spectrums of in-flight blackbox data?

@ChrisRosser

3 жыл бұрын

If you look at some of my more recent videos I compare to blackbox data. Hopefully you'll find them interesting!

@Gosuminer

3 жыл бұрын

@@ChrisRosser Thank you, will definitely do.

Have you seen the new arms they just came out with for this frame? It would be interesting to see the difference between the new arms and the old ones

@ChrisRosser

3 жыл бұрын

No I haven't, what's the difference? If they are thicker or stiffer that could help...

@jakeheizman

3 жыл бұрын

@@ChrisRosser I believe they are thicker and wider too, I just saw it in one of the videos they put out

@jakeheizman

3 жыл бұрын

@@ChrisRosser 4:20 minute mark is where they show them 😂

@jakeheizman

3 жыл бұрын

@@ChrisRosser It must have took my link away, it's the longer video on the tbs couch youtube page

@ChrisRosser

3 жыл бұрын

@@jakeheizman Thanks Jake, I'll check it out. I'm putting together a comparison of 4mm 5mm and 6mm arms to show the effect on resonance. It's pretty substantial!

Bartender, I’ll have whatever that quad is having 😛

I have found the worst thing for vibrations is the props. Even new ones. If they are bent or out of balance, they cause all kinds of vibrations.

@ChrisRosser

3 жыл бұрын

Aboslutely, and for larger quads you need to balance them by hand to have a chance of a smooth flight!

Is there a free software that you can recommend for this type of analysis?

@ChrisRosser

3 жыл бұрын

Not as far as I know. I believe fusion 360 has some simple simulation capabilities.

Resonance fatigue...Raindeer Airlines. square windows or round?

Are you assuming that all carbon fiber composite laminates are isotropic in your simulations?

@ChrisRosser

3 жыл бұрын

Thanks for your comment! I use the following properties and the simulation is orthotropic. www.performance-composites.com/carbonfibre/mechanicalproperties_2.asp

Sorry Chris, but what version of the source one did you use...?

@ChrisRosser

Жыл бұрын

V4 I think?

Anyone else see a TinyHawk II in this new frame?

@ChrisRosser

3 жыл бұрын

You're right it does look similar! My design is a 5in frame with individual arms. I've just had some prototypes back so stay tuned for an update video!

@narr0wm1nd49

3 жыл бұрын

@@ChrisRosser it looks like your arms are more right angles than the tinyhawk II at the front and back. It would be interesting to see how that impacts the analysis.

Dave C 5" minilr / rekon 5 A lot lol

is this v3 of the source one? Did you analyse v4 yet?

@ChrisRosser

2 жыл бұрын

I think this is V4 for the source one.

@rubenvaneupen7327

2 жыл бұрын

@@ChrisRosser oh nice. v4 is lighter and thinner arms (2mm), I guess it's +- 99grams instead of 145 grams for the v3

@ChrisRosser

2 жыл бұрын

@@rubenvaneupen7327 The V4 also has significantly worse resonance performance than the V3 due to the thinner arms so it doesn't take a tune as well. In that respect its a big step backwards. Try and get the V4 with 6mm arms to compensate somewhat 👍

@rubenvaneupen7327

2 жыл бұрын

@@ChrisRosser yep, that's what I feared for :( . Anyhow, will check what happens when the build is finished first :).

How would a Boxframe behave? :)

@ChrisRosser

3 жыл бұрын

Hmm, that's a very interesting question. I'll have to model one and see...

@Johsun87

3 жыл бұрын

@@ChrisRosser U have the TBS Source V or Carbix Zero frames :)

@ChrisRosser

3 жыл бұрын

@@Johsun87 Source V is perfect as the cad is available. If I don't have to model the quad the work goes infinitely faster 👍👍👍

What about 7 inch + propeller? The longer the propeller, more flutter, higher resonance, natural frequency, etc. Probably your AOS5 design is the answer for 7inch prop and larger frame. Also your tuning video lesson solve my 7inch quad's jello problem at higher throttle. Now I can turn off stab mode on my gopro, perfect 😁. Your video is so informative, on point. Keep it up. Thanks Chris the Engineer 😎🚀

dont put an armattan frame in that sim🙈🙈🙈 it will be flopping around worse than at dead duck...🤣 nice video! although it doesnt make me feel any smarter 😅

@ChrisRosser

3 жыл бұрын

Oh, it would be unfortunate if someone were to simulate some armattan frame resonances and, I don't know, post them on this channel. But that man would need to be a maverick with nothing to lose, have access to fea software and know how to use it ... 🤠🤠🤠

@mazaispiileens

3 жыл бұрын

Motte space carbon... dont know what you are talking about...

@weberentertainment2962

3 жыл бұрын

@ruziFPV okay sure.. Fine! That might be true, you convinced me, now show me where I can buy that then😉😉😉

@mazaispiileens

3 жыл бұрын

@@weberentertainment2962 ahh, sorry. Forgot they supply the space grade just for warranty. 😪 Maybe someone sells it second hand. 😅

@mazaispiileens

3 жыл бұрын

@@weberentertainment2962 but nevertheless, its one of the most rigid frames I know. Mine has super minimal filtering.

Just buy good quality frame and tuning will be a matter of minutes

@ChrisRosser

3 жыл бұрын

Certainly a good quality frame will ensure that you can get a reasonable result easily. But people have also spent $100+ on a frame and still had resonance issues (particularly mid throttle oscillation). Even the most expensive frames aren't considering resonance in a scientific way. I'm hoping to change that!

@MoppelMat

3 жыл бұрын

@@ChrisRosser exactly my problem! I am through the GepRC Mark4 HD/ and am on the Project 399 Super G+ 7". having still jello problems after 200$ of frames. I hope I can fix some of that with a joint from the front to the back motors as you suggested recently. please try to make a simulation of that frame www.project399.com/collections/products/products/super-g-extended

none of this is necessary what so ever especially on a tried and tested apex