You are a true gift to the FPV community. Thank you so much for all of your work! Looks like an amazing frame! I can see you are truly exited about it. Love your work man.
I built one last weekend and I'll tell you it's an incredible frame. It's almost unbelievable how stiff it is and that there is absolutely no vibration or jello in the video. The black box analysis shows an even better result (if that's possible) than where Chris shows the frequency plot on the debug graph. Mine is absolutely black, not even showing motor resonance traces. Just unbelievable and its performance regarding propwash or the lack thereof is equally stellar. Last night I bought a larger 3,000mah 6S Lipo to try some mid-range flying. So far I've just flown it on a 1350mah Lipo for about 5 minutes at a time. What an achievement!
My AOS7 is by far my favorite frame. I designed it for high speed chase with a GoPro and it performs superbly. I'll bet a fresh UL would be even better, but I'm concerned about how the arm tabs wear over time. Has anybody tested the UL after a couple rounds of assembly/disassembly and a bunch of flight time? Thanks for what you do!
I have some questions about the (LR) performance of this frame. First it’s almost 20 grams heavier than the frame I currently use for LR. The second reason I question the efficiency is it’s aerodynamic cross section for forward flight, as it appears to be significantly larger than my current frame. The different arm configuration probably makes no difference, given than most of the arms are under the airflow of the props anyway. But the larger cross section of the body is going to make a significant difference in forward flight. However much I appreciate your work regarding frame resonance, I doubt that that would weigh up (literally and figuratively, pun intended) to the performance drawback of increased weight and aerodynamic drag of the body in forward flight. So I guess my question is if you’ve done any real analysis of the aerodynamics and/or cross section in forward flight?
Curious, what's your current 7" frame? I actually came here to find out the weight of this but it's not listed in the product page. Edit: haha, I forgot he said 170g in the video..🥴
Not just arms, control arms! What a sick design brother. Yeah the rulebook never went away. If you're making a flying machine Ultralight should always be a prime directive. That concept is older than drones. I released a 5" Ultralight racer, the ULX, with SpeedSourceFPV last year. It builds to half the weight and cost of traditional racers, with no performance disadvantage whatsoever and unprecedented stiffness and durability (lemme know if you'd like to test one). Many of the principles you've employed here are things I've been stumping on for some time now. But your elegant design and eloquent explanation are definitely going to make more believers than I have. Its so well done. I never expected anything less. Kudos and please keep amazing us with your science and innovation.
I fly in the desert so when I crash, it’s on rocks. The AOS7 frame is indestructible (two crashes, only broken props). I really like this new design and may give it a try.
I bought the AOS7 Evo frame and I’m struggling to have it perfectly flat. It’s a bit twisted when placed on a flat surface. I made sure all fit nicely, then tightened the screw to the maximum, but still, it don’t lay perfectly flat. You, Chris Rosser, are one sweet-talking scammer 😄
Sorry to hear you're concerned about this issue. Although I'm not directly involved in the manufacturing of the frames I can share my experience: carbon fiber plate (especially thinner pieces) with high fiber content (which is the high quality plate) is rarely if ever perfectly flat. Even with a balanced layup you get some slight pre-stress which causes a saddle shape. This doesn't affect flight performance, but I can understand why you might be concerned about a quality issue. If you're having issues in flight please let me know by email and/or reach out to the manufacturer.
I'm a bit bummed with the O3 labeled frame I have, the LR5. It's gyro data is unusable, based on previous feedback you told us it's an O3 issue that should be resolved by DJI. Now I have to order extra parts to get rid of the vibration in the gyro? I wouldn't mind if your parts would be easily available in the EU but I have to order from cncdrones resulting in a 30 euro fee on top of everything else. I think I can buy a whole new frame for this TPU O3 upgrade.
You and me both! So I got an O3 2 weeks before launch and I flew it hard mounted with no issues (you can see some stabilised footage in my O3 review). Then AFTER LAUNCH I hear that some O3 cameras need to be soft mounted for stabilisation to work and some O3 cameras have loose lens assemblies so they have horrible vibrations all the time. It would have been nice if DJI had given any guidance at all on the requirements for frame design before launching the system. But they didn't so we are where we are. I'm doing my best to fix this for us with a soft mounting solution for the FPV camera but this really isn't my problem to solve. If DJI needs their camera to be soft mounted they should bloody well provide a suitable soft mount or make it very clear exactly what is required of the frame designer. They did neither. The good news is that hard mounting a good O3 camera works fine with EIS off so people can enjoy the improved image quality on AOS frames today and I can keep working on coming up with a good fix for this mess. 🤣
@@ChrisRosser Is it consensus in the community that it is caused by loose lens assemblies? I'm wondering what my chances are of fixing it by opening up the camera and fixing the assembly. I just got another O3 in I'll swap it out and see if I'm lucky with this one. In the meantime I'll design a TPU mount myself to fit on the current frame.
@@aviatoFPV If you have vibration issues with the footage in the goggles then that's a loose lens assembly. The gyro data might be improved by a TPU mount but there are certainly differences between O3 cameras. I've always had mine hard mounted and not had any vibration issues with EIS.
@@ChrisRosser Luckily I only have the issues in gyro data. I'm seeing a vid from madstech about this issue popping up, what timing. Thanks for the answers! Love your frame, if your products would be more easy to buy in EU I would have more of them already!
Please improve the rigidity of the 5v2and 5.5 v2 They break arms and x plates constantly This is a recurring problem. Also not enough thread engaged in the arm to stand-off bolts.
Yeah I have the same weak arm issue on my aos 5.5 V2. The carbon arms also slowly start delaminating. Give them a Twist once in a while and see if that is the issue. There is a loss in stiffness. The new aos 5 O3 frame apparently has thicker arms now. They are compatible. Four arms are unfortunatly over half the price of a new frame. They really should have given 2mm longer screws for the arm mount of the frame. I ordered some longer ones. They didnt hold well and I also striped my standoff threads they screw into. My Apex frames are very solid and never have any of these issues.
Hi Chris, thanks for the feedback. I can confirm that I was made aware of both these concerns some time ago and they have both been addressed in the latest versions of both frames with slightly thicker arms and longer screws.
Hi Chris. I have a question regarding the frame. I have just started to assemble the arms and have noticed the kit only contains 9 short metal stand offs but it looks like on the instructions I need 3 per arm. I also noticed the lower plate under the motor has a press nut on one of the holes. Do i use the shorter plastic stand off on this hole and find a screw to go through? Hope that makes sense. Thanks
Please make a build video. and how to install the O3 camera and Air Unit. As everyone knows you can't hard mount the O3 Camera. I have two frames to build.
A great design. I designed a 6" box racer with similar hollowed vert arm and out box features a few years ago. However My reasoning was that since material could be removed in the center of the out box vertical sections, that the depth of the fins could be increased for more authority. The trick is to use sheet material such as vinyl or a better adhered film to close the surface back up for less turbulent flow.
What about electrical noises transferring to the hardmounted connectors? Whenever I had SMA connectors mounted directly on carbon (I only tried it with analog this way, so don't know how digital behaves then), I had TERRIBLE video noise as soon as I armed the quad, making it basically impossible to fly. Do you have any solution to that? Or was I just unlucky/had a setup with a bit more noise?
I have a 5inch, carrying a DJI AirUnit-01. the two SMA antennas are glued to the SMA to MMCX extensions, with the 2mm of carbon top plate sandwiched between the SMA connectors. DJI? Silicone? I don't know enough about radio to say. But so far so good, no issues.
Could you make a version that is x8 compatible ? Either by making sure the clearance for bottom motors is enough to allow for arming or Maybe a 3D print landing gear
Hi Chris. CncDrones uses T300 Carbon Fibre whereas most quality frames from major brands like iFlight and Foxeer is constructed from Toray T700 which has a tensile strength of almost 40% more than the T300 used by CncDrones. Would it be possible to make all your frames available somewhere that uses higher quality carbon fibre?
You can buy AOS frames from iFlight if you like better carbon. i bought some AOS frames from iFlight, they all have the same type of material as frames like Nazgul or Chimera.
@@dabfpv Not all AOS frames or the latest 03 version AOS frames are available from iFlight. Don't quite understand the thinking behind designing arms that are more crash resistant, but then using low quality carbon fibre with an almost 40% reduced tensile strength.
Chris, I plan on building a maximum duration observation platform. Your arm design should help facilitate that result. What do you estimate the maximum duration flight time would be with optimal motors, propellers and battery? What motor propellers and Battery would you use as the first estimate. Thank you.
Sadly I missed this drone frame roll out and bought the AOS 7. I like it but it is heavy. Sadly my motror bolts on the bottom of the arms are worn because I cannot find anywhere on Thingverse or Brain3D any 3d printed gaurds. Sad that you did not provide links or parts like like other vendors for such a well designd frame. Can You Please help with guards for this frame???
Would love to see toilet tank battery strap slots in designs moving forward. A reference for balancing at the center of thrust (little nubs) would be useful too. Anyways, kickass as always. All 3 of my quads are your frames.
Nice to see something new in 7" space. I guess this would also scale well to 10" and beat the new Rekon 10 in pretty much every category: weight, stiffness, durability.
@@QSpeedRacer You are right. I just found UL7 weight listed on cncdrones at 175 grams. Reckon 7 is listed as 152.7g in some sources. So it is a little heavier but the diff is not that big when you take AUW into account.
@Chris Rosser Very impressive frame design, I love it! Could you tell me how to turn on the green marker in betaflight blackbox log viewer? I saw that this feature is marked in the git as "enhancement", but has not yet been implemented..
Very particular and interesting building structure ! I have an AOS 7 classic first version, is UL7 wider? I mean are motors on the sides ( 1&2 vs 3&4 ) far then in AOS7 , or the distance is the same ?
Hey Chris! Hello everyone! I have a short question! You provided on your website a stl for an ELRS antenna mount. How ist this to use? I have no clue! Or do have someone a tip for me?
This is a really great design, I must have this! Where can I buy this frame (cncdrones says "not for sale"? I am in the EU btw., but also importing would not be a problem. Thanks and keep up the great work!
Hi Chris. I'm running Tmotor Avengers 2806.5 1700KV(It's what I already have, so I don't have to buy a new sets of motors.) on the AOS UL7 frame. Do I need to set Throttle Limit or Motor Output Limit to have a smooth and somewhat efficient flight?
awsome, what a beauty,, can't wait for the long range data. Also possibilities to add bottom motors and load quick release rail for a heavy load . Looks a bit like car frame. Nice
@@ChrisRosser super! Let us know when the updated top plate will be available. I have an AOS7 frame and all the gear for it just waiting to go together…
Hi, please do this review with HDZero components. I am a newbie researching my first drone build. I have only purchased a Taranis X9D and fairly certain that I will go for the HDZero goggles. Where can I find more about gyro tuning and filters? Fantastic channel...
Hi Cris I would like to ask you a question, even if I set the preset for the AOS UL7 and raised some parameters such as the master multiplier that you recommended, I end up with a drone that runs much better than before but my engines are always hot, not they are hot but they are just hot and this worries me a bit, what should I do to remove this problem? I also hear a whistling in the motors that cannot be removed but is this normal on such large drones? Let me start by saying that I have never had a 7 ".l, it mounts brotherhobby avenger v3 2812 1115kv engines, hqprop 7x4x3 propellers, holibro kakute h7v1 stack, O3 video system and Tbs crossfire diversity radio system, it mounts a 5300mah lipo 6s and has a gopro mini 11 as an action cam. Thank you for your help your help
Hi, I am planning to build my first drone with this frame. Where can I buy this frame in the UK? Also, is it possible to build it in such a way that it would perform like an FPV drone but also like a cine whoop (for photography)? Sorry for the newbies questions - please help? Regards
What’s your take on coaxial props? Is there any performance or efficacy benefit? How should I treat that configuration for prop pitch, motor sizing, and disk loading calculations?
Ok I'm sold. And this will be my first ever build too. In for a penny... Maybe wait for the 03 adaptations however so I guess I'll slap the rest of the shopping list together in the meantime
Depends on your needs. If you need O3 ND filters and EIS then maybe worth waiting. If you plan to run a GoPro then the current version already supports all the features of O3 you will ever use.
I’m interested to see the new soft mount for the 03. I had an issue with shaky video from the 03 on my AOS 5 but it went away when I glued the lens barrel. DJI Support was trying to blame vibration from the frame. I sent them my black box logs but they said they can’t look at 3rd party data.
just ordered this frame and super excited to get it in the air here in the coming month or 2... can you recommend a couple things? ill be using an 03 air unit.. so what length ufl to sma cables should i get, and same question about antenna length on the top mount. Thanks!!
Very interesting 🤔 I have AOS Falcon 7. If I move everything to this frame it would make it 145g lighter. I’m using tmotor f90 1300kv motors. It says it supports up to 7.5 inch props. So 145g lighter and 7.5 instead of 7 inch props, what difference you think that would make?
I think that would give you a good increase to flight time and performance. F90s are perfect for the UL7. HQ 7.5x3.7x3 props would be my recommendation.
@@FalconRadFPV front 3d prints are necessary for Fpv camera and gopro mount is also needed. So apart from front skids I’m not sure what 3d prints can be taken off?
@chris Rosser New frame looks great, Im enjoying my 3.5 O3 at the moment. I have a question regarding the 3.5 though…the camera plates are very loose fit when properly tightened and assembled…it is causing a horrible jello/wobble in the video feed to the goggles (osd elements stay solid) Is it possible I got a bad cut on my frame? Do any other examples of your frames have this play (easily a mm or so back and forth) in the camera plates? Im hesitant to use glue due to the inconvenience and not really in the mood to design a tpu part to hug the plates and secure them to the frame. Look forward to hearing back.
Hi, sorry to hear you've had this issue. If you think it's a manufacturing defect the best thing to do is to reach out to your manufacturer and they should take care of this for you. With the standoffs and camera in place you shouldn't have any movemement in the camera cage. If you are using an O3 camera you may also want to check for a loose lens assembly.
i just ordered the aos3.5 to replace my crux35 frame, mainly i wanted the replacable individual arms and im hoping being 4mm instead of 3mm it will be a bit stronger, and far easier to replace when i do break an arm. plus im hoping to benifit from the quieter frame as i was having a lot of issues trying to get a smooth tune out of the crux35 frame without getting hot motors. im just wondering if i can use dry lube like graphite powder on the joints instead of dampening grease as you suggest as the graphite will remain much much cleaner.. hopefully later this year i will be able to afford to build a 5 and a 7 inch and ill 100% be using this frame for my 7 inch and the coloured carbon from cncdrones is sweet i cant wait to build my clown quad with all different colour arms and plates as i brought all different colour spares for my aos3.5 LOL!
BUILD LOG VIDEO: th-cam.com/video/xugayl5hhFE/w-d-xo.html in case anyone wants a full follow along tutorial, there wasnt one for me, hence why i made one. Hope you dont mind me posting it here Chris. Thanks again for a great, light, and floaty frame!
I'm probably typing something stupid but, considering the the vertical pose of the arm, why don't create a 'modular system' posing the arm the same tilt of the camera? That way there might be a even lower air friction (at least in my mind :D)
I'll have to have a think on that! When considering the arm aerodynamics we should remember that the prop has a huge impact on the direction of air flow. Even when flying forward the prop pushes the air almost straight down onto the arm.
Cool design chris! I was wondering if you plan on making a 6" version of this with perhaps support for these motors with 12x12 mounting Rcinpower GTS V3 2105 Plus 1850KV for example
@@RobertLeeuwerink if you want a light 6" frame too, then get the five33 switchback with 6" arms. Otherwise there are no light 6" frames out there that are durable and stiff enough. Those 2105.5 are my ultralight 6" pick too. Forgot the five33 frame has 16x16 motor mount. Then maybe the amax 2305.5 light motor version.
@@chrisbee5481 the reason I'm asking was mostly because I was a big fan of the rekon 6 but recently the QA hasn't been good and they changed so of the specs
There is *a lot* of flexibility in battery weight. For LiPos the frame flies great with 2x1100mAh 6S packs (400g) all the way up a 6000mAh 6S (900g). For super long range you'll want to go with 6S Li-ion packs. Either 3x 3000mAh 18650 based (900g) or 2x4000mAh 21700 based (900g). I would probably go with 3x3000mAh 6S Li-ion packs but make sure you have a throttle limit to prevent drawing more than 10C discharge from the Li-ion cells (that's still 90A for 3x3000mAh though!)
Super smart design.👍 I wonder if they'd be any difference in flight characteristics if the arms didn't have cut outs, owing to them behaving like a defacto lifting surface due to an approximate 45degree angle of attack..🤔
Possibly, but I'd say it might only be efficient or beneficial at more than 45.. probably closer to 70 or 80. I have wanted to see a quad designed with this in mind, seems interesting
Aerodynamically active surfaces are an absolute no no for camera drones as they make the drone more susceptible to turbulence which leads to shaky footage. If you've flown a fixed wing FPV you'll know what I mean! 😁
The right side arms appear to be upside down the diagonal supports are pointed down they should be pointed up like the way the left side is. Is it possible that you could just flip the arm right side up or is it not symmetrical?
Honestly, I hadn't even thought about it. Now that I have, I think performance might be even better if the trusses are fully symmetric! The arms are completely symmetric so you can install them both ways round.
I like that low noise that you've achieved, but no quad is vibration free. My biggest concern is that the press fit slot joints for holding the arms to the body are going to fragment and wear quickly.
It will bring an improvement in performance and weight but a reduction in durability in crashes. 2x6S 21700 or 3x6S 18650 are where it's at for long range 😁👍
@@ChrisRosser guess I should keep the AOS7 cause I do like to put 2x 140c 1400mah Rulines in her and rip it around has been known to make unplanned contact with the earth at times hahaha
Dear Chris, I have a big question for you regarding the AOS UL7 frame! I have the utmost respect for you as an engineer and an excellent practitioner of a scientific approach to FPV. But still, explain to me the difference between AOS7 and AOS UL7? Judging by the name, the AOS UL7 should be lighter than the regular AOS7. But this is not so. Both frames are approximately the same in weight. What is the advantage of AOS UL7?
hi @Chris Rosser, I think 200hz is way too low at 8:08 of the video. that mean, in my opinion that your frame is not stiff enough. Moreover, your lowest resonant frequencies is gonna make your frame resonate since is in the range of your motor rpm. I think you'll need a spectrale analysis of your frame and a structural optimisiation. I can see too that there is structural paterns in the arms, I think they are generic and you could optmise them too. I have many Ideas. best regards, Robert kevin.
Should put a damper/strut brace between the struts and it will remove high frequency motor vibration feeding to FC and protect against crash even more, the little locator tabs at the motor mounts being a large weakness in a crash as are of a small area,suffer forces in shear and of a torsional nature.
Interesting design - I could see the vertical arms adding drag in forward flight - would love to see an A/B comparison with a similar 7" with traditional arms to see if that's offset by the reduced cross-section in the propeller wash
When we think about arm aerodynamics we have to remember that the prop has a huge impact on airflow direction. When the quad is flying forwards the air is not hitting the arm from the front. The air is being pushed down onto the arm by the prop. The prop thrust column has a much bigger impact on airflow direction over the arm than any movemement of the quad in steady flight.
Lost my falcon, then got the aos7, I absolutely love it. Is this a replacement of that? Does the regular 7 still have better tuning availabilities? Also Im wondering if the 5UL is able to carry a GoPro mini.
What i saw in your build is the trusses are not symmetric. On left arm, diagonal links are on compression but on the other side, they are on tension. Wouldn't it create problems ? I assume you can just flip it and mount it that way.
Experimentally it doesn't create problems (you can see this clearly in the blackbox) but thinking about it performance might be EVEN BETTER with the trusses orientated symettrically. Thanks for the suggestion!
You are a true gift to the FPV community. Thank you so much for all of your work! Looks like an amazing frame! I can see you are truly exited about it. Love your work man.
I built one last weekend and I'll tell you it's an incredible frame. It's almost unbelievable how stiff it is and that there is absolutely no vibration or jello in the video. The black box analysis shows an even better result (if that's possible) than where Chris shows the frequency plot on the debug graph. Mine is absolutely black, not even showing motor resonance traces. Just unbelievable and its performance regarding propwash or the lack thereof is equally stellar. Last night I bought a larger 3,000mah 6S Lipo to try some mid-range flying. So far I've just flown it on a 1350mah Lipo for about 5 minutes at a time. What an achievement!
Top level Chris. Well done.
Just ordered one. Typically I don't buy frames but this one is worth every penny I paid. Thank you for all your content and now this product.
My AOS7 is by far my favorite frame. I designed it for high speed chase with a GoPro and it performs superbly. I'll bet a fresh UL would be even better, but I'm concerned about how the arm tabs wear over time. Has anybody tested the UL after a couple rounds of assembly/disassembly and a bunch of flight time?
Thanks for what you do!
@Chris Rosser Any update on when it will be available again, or if there will be updates to the frame ?
I have some questions about the (LR) performance of this frame.
First it’s almost 20 grams heavier than the frame I currently use for LR.
The second reason I question the efficiency is it’s aerodynamic cross section for forward flight, as it appears to be significantly larger than my current frame. The different arm configuration probably makes no difference, given than most of the arms are under the airflow of the props anyway.
But the larger cross section of the body is going to make a significant difference in forward flight.
However much I appreciate your work regarding frame resonance, I doubt that that would weigh up (literally and figuratively, pun intended) to the performance drawback of increased weight and aerodynamic drag of the body in forward flight.
So I guess my question is if you’ve done any real analysis of the aerodynamics and/or cross section in forward flight?
Curious, what's your current 7" frame? I actually came here to find out the weight of this but it's not listed in the product page.
Edit: haha, I forgot he said 170g in the video..🥴
@@willpowerfpv3246 Rekon 7, 152 grams
Brilliant design, Chris! And it looks fantastic! 😃
Stay safe there with your family! 🖖😊
This is wild. Glad to see new concepts being implemented.
Very nice I love the way it looks and I really think the vertical trusses are going to become the gold standard for larger quads.
Fingers crossed!
I love this
What you are building is great and you are an inspiration for me
I'm going to build my own frame one day
You can do it! I can't wait to see what you come up with.
Not just arms, control arms! What a sick design brother. Yeah the rulebook never went away. If you're making a flying machine Ultralight should always be a prime directive. That concept is older than drones. I released a 5" Ultralight racer, the ULX, with SpeedSourceFPV last year. It builds to half the weight and cost of traditional racers, with no performance disadvantage whatsoever and unprecedented stiffness and durability (lemme know if you'd like to test one). Many of the principles you've employed here are things I've been stumping on for some time now. But your elegant design and eloquent explanation are definitely going to make more believers than I have. Its so well done. I never expected anything less. Kudos and please keep amazing us with your science and innovation.
This is great! Don't stop man!
Question: Does the truss arms have a specific orientation? The CNC website orientation mirrors the other side, whereas yours does not.
@ChrisRosser: does it make any difference how to install the arms?
Finally its out!
I fly in the desert so when I crash, it’s on rocks. The AOS7 frame is indestructible (two crashes, only broken props). I really like this new design and may give it a try.
The UL7 is not going to be as durable as the AOS 7. The thin arms are lighter but not as tough. That's in line with the AOS UL frame philosophy. 👍
I bought the AOS7 Evo frame and I’m struggling to have it perfectly flat. It’s a bit twisted when placed on a flat surface. I made sure all fit nicely, then tightened the screw to the maximum, but still, it don’t lay perfectly flat. You, Chris Rosser, are one sweet-talking scammer 😄
Sorry to hear you're concerned about this issue. Although I'm not directly involved in the manufacturing of the frames I can share my experience: carbon fiber plate (especially thinner pieces) with high fiber content (which is the high quality plate) is rarely if ever perfectly flat. Even with a balanced layup you get some slight pre-stress which causes a saddle shape. This doesn't affect flight performance, but I can understand why you might be concerned about a quality issue. If you're having issues in flight please let me know by email and/or reach out to the manufacturer.
Hey Chris, is there an option for X8 Motor mounts?
I'm a bit bummed with the O3 labeled frame I have, the LR5. It's gyro data is unusable, based on previous feedback you told us it's an O3 issue that should be resolved by DJI. Now I have to order extra parts to get rid of the vibration in the gyro? I wouldn't mind if your parts would be easily available in the EU but I have to order from cncdrones resulting in a 30 euro fee on top of everything else. I think I can buy a whole new frame for this TPU O3 upgrade.
You and me both! So I got an O3 2 weeks before launch and I flew it hard mounted with no issues (you can see some stabilised footage in my O3 review). Then AFTER LAUNCH I hear that some O3 cameras need to be soft mounted for stabilisation to work and some O3 cameras have loose lens assemblies so they have horrible vibrations all the time. It would have been nice if DJI had given any guidance at all on the requirements for frame design before launching the system. But they didn't so we are where we are. I'm doing my best to fix this for us with a soft mounting solution for the FPV camera but this really isn't my problem to solve. If DJI needs their camera to be soft mounted they should bloody well provide a suitable soft mount or make it very clear exactly what is required of the frame designer. They did neither.
The good news is that hard mounting a good O3 camera works fine with EIS off so people can enjoy the improved image quality on AOS frames today and I can keep working on coming up with a good fix for this mess. 🤣
@@ChrisRosser Is it consensus in the community that it is caused by loose lens assemblies? I'm wondering what my chances are of fixing it by opening up the camera and fixing the assembly. I just got another O3 in I'll swap it out and see if I'm lucky with this one. In the meantime I'll design a TPU mount myself to fit on the current frame.
@@aviatoFPV If you have vibration issues with the footage in the goggles then that's a loose lens assembly. The gyro data might be improved by a TPU mount but there are certainly differences between O3 cameras. I've always had mine hard mounted and not had any vibration issues with EIS.
@@ChrisRosser Luckily I only have the issues in gyro data. I'm seeing a vid from madstech about this issue popping up, what timing. Thanks for the answers! Love your frame, if your products would be more easy to buy in EU I would have more of them already!
Please improve the rigidity of the 5v2and 5.5 v2
They break arms and x plates constantly
This is a recurring problem.
Also not enough thread engaged in the arm to stand-off bolts.
Yeah I have the same weak arm issue on my aos 5.5 V2. The carbon arms also slowly start delaminating. Give them a Twist once in a while and see if that is the issue. There is a loss in stiffness.
The new aos 5 O3 frame apparently has thicker arms now. They are compatible. Four arms are unfortunatly over half the price of a new frame.
They really should have given 2mm longer screws for the arm mount of the frame. I ordered some longer ones. They didnt hold well and I also striped my standoff threads they screw into.
My Apex frames are very solid and never have any of these issues.
Hi Chris, thanks for the feedback. I can confirm that I was made aware of both these concerns some time ago and they have both been addressed in the latest versions of both frames with slightly thicker arms and longer screws.
Just ordered a frame. Can’t wait to start building.
I'll be wanting one as soon as the 03 is ready cheers
Impressive! And it reminds me to car suspensions
Hi Chris. I have a question regarding the frame. I have just started to assemble the arms and have noticed the kit only contains 9 short metal stand offs but it looks like on the instructions I need 3 per arm.
I also noticed the lower plate under the motor has a press nut on one of the holes. Do i use the shorter plastic stand off on this hole and find a screw to go through? Hope that makes sense. Thanks
Please make a build video. and how to install the O3 camera and Air Unit. As everyone knows you can't hard mount the O3 Camera. I have two frames to build.
A great design. I designed a 6" box racer with similar hollowed vert arm and out box features a few years ago. However My reasoning was that since material could be removed in the center of the out box vertical sections, that the depth of the fins could be increased for more authority. The trick is to use sheet material such as vinyl or a better adhered film to close the surface back up for less turbulent flow.
Congratulations on your new frame. Looks very interesting, enough so that if I didn't already have the og aos7 I'd probably get this one. 👍😎
Are you planning to do a test of motors for 7" quads? It will be great.
What about electrical noises transferring to the hardmounted connectors? Whenever I had SMA connectors mounted directly on carbon (I only tried it with analog this way, so don't know how digital behaves then), I had TERRIBLE video noise as soon as I armed the quad, making it basically impossible to fly. Do you have any solution to that? Or was I just unlucky/had a setup with a bit more noise?
I have a 5inch, carrying a DJI AirUnit-01. the two SMA antennas are glued to the SMA to MMCX extensions, with the 2mm of carbon top plate sandwiched between the SMA connectors. DJI? Silicone? I don't know enough about radio to say. But so far so good, no issues.
Could you make a version that is x8 compatible ? Either by making sure the clearance for bottom motors is enough to allow for arming or Maybe a 3D print landing gear
Will it be available from iFlight?
Almost certainly in a few weeks/months.
What's the durability of those arms; looks like the tabs in the top and bottom plates will pop out...
It's a UL frame so performance and lightweight are the priorities, it will be less durable than the AOS 7.
@@ChrisRosser Copy that!! Thanks for your reply! AOS7 I'll need...
How do you feel about the antenna position for long range? As compared to a position on the rear?
Hi Chris.
CncDrones uses T300 Carbon Fibre whereas most quality frames from major brands like iFlight and Foxeer is constructed from Toray T700 which has a tensile strength of almost 40% more than the T300 used by CncDrones. Would it be possible to make all your frames available somewhere that uses higher quality carbon fibre?
You can buy AOS frames from iFlight if you like better carbon. i bought some AOS frames from iFlight, they all have the same type of material as frames like Nazgul or Chimera.
@@dabfpv Not all AOS frames or the latest 03 version AOS frames are available from iFlight. Don't quite understand the thinking behind designing arms that are more crash resistant, but then using low quality carbon fibre with an almost 40% reduced tensile strength.
Can you put together a build video for this frame, received it and for the life of me cannot get this together.
same as me
@@danielcichocki8395 I sold the frame im going to stick with his v1 AOS 7 o3 this new frame sucks
Chris, I plan on building a maximum duration observation platform. Your arm design should help facilitate that result. What do you estimate the maximum duration flight time would be with optimal motors, propellers and battery? What motor propellers and Battery would you use as the first estimate. Thank you.
Any chance you can submit a motor plate design to CNC to accommodate a 16x16 motor instead of 19x19?
I want to buy an aos 7. Can I have a look your blackbox file to see the filtered noise map?
Amazing design 🙏
Sadly I missed this drone frame roll out and bought the AOS 7. I like it but it is heavy. Sadly my motror bolts on the bottom of the arms are worn because I cannot find anywhere on Thingverse or Brain3D any 3d printed gaurds. Sad that you did not provide links or parts like like other vendors for such a well designd frame. Can You Please help with guards for this frame???
Any BNF options?
Very impressive resonance performance 👍🏽
Would love to see toilet tank battery strap slots in designs moving forward. A reference for balancing at the center of thrust (little nubs) would be useful too. Anyways, kickass as always. All 3 of my quads are your frames.
Nice to see something new in 7" space. I guess this would also scale well to 10" and beat the new Rekon 10 in pretty much every category: weight, stiffness, durability.
Rekon7 frame is lighter so rekon 10 prob lighter. But UL7 is way way stiffer. I'd imagine flies so much more smoother.
@@QSpeedRacer You are right. I just found UL7 weight listed on cncdrones at 175 grams. Reckon 7 is listed as 152.7g in some sources. So it is a little heavier but the diff is not that big when you take AUW into account.
@prki not much of a difference. The big differences come in the form of stiffness and battery space over the rekon 7.
@Chris Rosser Very impressive frame design, I love it!
Could you tell me how to turn on the green marker in betaflight blackbox log viewer? I saw that this feature is marked in the git as "enhancement", but has not yet been implemented..
Hold shift key down as you move the mouse 👍
@@ChrisRosser Thanks a lot!
Straight away, triangulated truss beam structure makes perfect sense.
Very particular and interesting building structure ! I have an AOS 7 classic first version, is UL7 wider? I mean are motors on the sides ( 1&2 vs 3&4 ) far then in AOS7 , or the distance is the same ?
Yes the motor spacing is wider to support 7.5" props and go pro.
Do you have a link to the SMA and antenna you are using for the 03
Hey Chris! Hello everyone!
I have a short question! You provided on your website a stl for an ELRS antenna mount. How ist this to use? I have no clue! Or do have someone a tip for me?
Looking forward to some flight footage
dear friend please recommend in your opinion the best frame for 7 inch long range for long and long flight thanks a lot
@ChrisRosser Do you have plans to scale this to 10"? We have RekonFPV, iFlight, Foxeer coming out with 10" offerings, AOS RC needs one too!🙂
This is a really great design, I must have this! Where can I buy this frame (cncdrones says "not for sale"?
I am in the EU btw., but also importing would not be a problem.
Thanks and keep up the great work!
Would I be able to put single ESCs on the arms?
This looks great! Any idea when the frames will be back in stock?
is it possibe to use this as a lifter for 1.5Kg camera?
Hi Chris. I'm running Tmotor Avengers 2806.5 1700KV(It's what I already have, so I don't have to buy a new sets of motors.) on the AOS UL7 frame. Do I need to set Throttle Limit or Motor Output Limit to have a smooth and somewhat efficient flight?
What size motor and kv do you know that will work best for this frame?
awsome, what a beauty,, can't wait for the long range data. Also possibilities to add bottom motors and load quick release rail for a heavy load . Looks a bit like car frame. Nice
That looks very unique
very nice! Any thoughts about designing an updated AOS7 upper plate with the same SMA mount points?
Yeah I can do that! It's a super minor change as well as it doesn't affect compatibility with any other parts.
@@ChrisRosser super! Let us know when the updated top plate will be available. I have an AOS7 frame and all the gear for it just waiting to go together…
Hi, please do this review with HDZero components. I am a newbie researching my first drone build. I have only purchased a Taranis X9D and fairly certain that I will go for the HDZero goggles. Where can I find more about gyro tuning and filters? Fantastic channel...
Where can we see a long range flight of this one?
I can't really do long range where I live. I'm relying on other great members of the community for this over the next few weeks/months. 😁
I got a colored carbon ul7 🎉🎉 can’t wait!!
Hi Cris I would like to ask you a question, even if I set the preset for the AOS UL7 and raised some parameters such as the master multiplier that you recommended, I end up with a drone that runs much better than before but my engines are always hot, not they are hot but they are just hot and this worries me a bit, what should I do to remove this problem? I also hear a whistling in the motors that cannot be removed but is this normal on such large drones? Let me start by saying that I have never had a 7 ".l, it mounts brotherhobby avenger v3 2812 1115kv engines, hqprop 7x4x3 propellers, holibro kakute h7v1 stack, O3 video system and Tbs crossfire diversity radio system, it mounts a 5300mah lipo 6s and has a gopro mini 11 as an action cam. Thank you for your help your help
Hi, I am planning to build my first drone with this frame. Where can I buy this frame in the UK? Also, is it possible to build it in such a way that it would perform like an FPV drone but also like a cine whoop (for photography)? Sorry for the newbies questions - please help? Regards
What’s your take on coaxial props? Is there any performance or efficacy benefit? How should I treat that configuration for prop pitch, motor sizing, and disk loading calculations?
Ok I'm sold. And this will be my first ever build too. In for a penny... Maybe wait for the 03 adaptations however so I guess I'll slap the rest of the shopping list together in the meantime
Depends on your needs. If you need O3 ND filters and EIS then maybe worth waiting. If you plan to run a GoPro then the current version already supports all the features of O3 you will ever use.
I’m interested to see the new soft mount for the 03. I had an issue with shaky video from the 03 on my AOS 5 but it went away when I glued the lens barrel. DJI Support was trying to blame vibration from the frame. I sent them my black box logs but they said they can’t look at 3rd party data.
just ordered this frame and super excited to get it in the air here in the coming month or 2... can you recommend a couple things? ill be using an 03 air unit.. so what length ufl to sma cables should i get, and same question about antenna length on the top mount. Thanks!!
So, the difference between the previous aos7 could be the weight ???
awesome! does it support 7,5 inch props?
Yes it does.
Very interesting 🤔 I have AOS Falcon 7. If I move everything to this frame it would make it 145g lighter. I’m using tmotor f90 1300kv motors. It says it supports up to 7.5 inch props. So 145g lighter and 7.5 instead of 7 inch props, what difference you think that would make?
I think that would give you a good increase to flight time and performance. F90s are perfect for the UL7. HQ 7.5x3.7x3 props would be my recommendation.
The AOS Falcon 7 is about 200 grams (without 3d prints), the AOS UL7 frame is 170 grams, its a 30 gram difference not 145.
@@FalconRadFPV front 3d prints are necessary for Fpv camera and gopro mount is also needed. So apart from front skids I’m not sure what 3d prints can be taken off?
What battery brand do you recommend I buy for this build ? Thanks for this video . I’m making purchase now
In Truss We Trust
@chris Rosser New frame looks great, Im enjoying my 3.5 O3 at the moment. I have a question regarding the 3.5 though…the camera plates are very loose fit when properly tightened and assembled…it is causing a horrible jello/wobble in the video feed to the goggles (osd elements stay solid) Is it possible I got a bad cut on my frame? Do any other examples of your frames have this play (easily a mm or so back and forth) in the camera plates? Im hesitant to use glue due to the inconvenience and not really in the mood to design a tpu part to hug the plates and secure them to the frame. Look forward to hearing back.
Hi, sorry to hear you've had this issue. If you think it's a manufacturing defect the best thing to do is to reach out to your manufacturer and they should take care of this for you. With the standoffs and camera in place you shouldn't have any movemement in the camera cage. If you are using an O3 camera you may also want to check for a loose lens assembly.
i just ordered the aos3.5 to replace my crux35 frame, mainly i wanted the replacable individual arms and im hoping being 4mm instead of 3mm it will be a bit stronger, and far easier to replace when i do break an arm. plus im hoping to benifit from the quieter frame as i was having a lot of issues trying to get a smooth tune out of the crux35 frame without getting hot motors. im just wondering if i can use dry lube like graphite powder on the joints instead of dampening grease as you suggest as the graphite will remain much much cleaner.. hopefully later this year i will be able to afford to build a 5 and a 7 inch and ill 100% be using this frame for my 7 inch and the coloured carbon from cncdrones is sweet i cant wait to build my clown quad with all different colour arms and plates as i brought all different colour spares for my aos3.5 LOL!
BUILD LOG VIDEO: th-cam.com/video/xugayl5hhFE/w-d-xo.html
in case anyone wants a full follow along tutorial, there wasnt one for me, hence why i made one. Hope you dont mind me posting it here Chris. Thanks again for a great, light, and floaty frame!
I'm probably typing something stupid but, considering the the vertical pose of the arm, why don't create a 'modular system' posing the arm the same tilt of the camera? That way there might be a even lower air friction (at least in my mind :D)
I'll have to have a think on that! When considering the arm aerodynamics we should remember that the prop has a huge impact on the direction of air flow. Even when flying forward the prop pushes the air almost straight down onto the arm.
what 2806,5 kv motors do you recommend for LR with two packs of li-ion 6s packs?
It looks amazing, I think I want make a drone with this frame
Does it get props in view with the big 170 fpv of the walk snail setup though
Walksnail was my plan too.
How much cruise time did you get with the 5200 mAh 6s with the 1500 g AUW?
thanks for your quick improvement on your frames about the DJI 03 peculiarity :)
Cool design chris! I was wondering if you plan on making a 6" version of this with perhaps support for these motors with 12x12 mounting Rcinpower GTS V3 2105 Plus 1850KV for example
6" 1850kv is a little much. Foxeer has some 2105.5 with 1650kv. Might be more suited. Think they are made by rcinpower
@@chrisbee5481 those are nice too and also very light 20ish grams
@@RobertLeeuwerink if you want a light 6" frame too, then get the five33 switchback with 6" arms. Otherwise there are no light 6" frames out there that are durable and stiff enough. Those 2105.5 are my ultralight 6" pick too. Forgot the five33 frame has 16x16 motor mount. Then maybe the amax 2305.5 light motor version.
@@chrisbee5481 the reason I'm asking was mostly because I was a big fan of the rekon 6 but recently the QA hasn't been good and they changed so of the specs
@@chrisbee5481 and your new frame can easily add this option as the motor arm plates are quite small
So can we now get a 7” motor test I would love to see some data comparing 2806.5 motors to 2808
Did you have recommendations on weight of the battery? Ideal and maximum recommend.
There is *a lot* of flexibility in battery weight. For LiPos the frame flies great with 2x1100mAh 6S packs (400g) all the way up a 6000mAh 6S (900g). For super long range you'll want to go with 6S Li-ion packs. Either 3x 3000mAh 18650 based (900g) or 2x4000mAh 21700 based (900g). I would probably go with 3x3000mAh 6S Li-ion packs but make sure you have a throttle limit to prevent drawing more than 10C discharge from the Li-ion cells (that's still 90A for 3x3000mAh though!)
@@ChrisRosser thanks for your feedback, your hard work is truly appreciated.
Maybe i missed it, but what was/is the flight time using that battery?
Super smart design.👍 I wonder if they'd be any difference in flight characteristics if the arms didn't have cut outs, owing to them behaving like a defacto lifting surface due to an approximate 45degree angle of attack..🤔
Possibly, but I'd say it might only be efficient or beneficial at more than 45.. probably closer to 70 or 80. I have wanted to see a quad designed with this in mind, seems interesting
Aerodynamically active surfaces are an absolute no no for camera drones as they make the drone more susceptible to turbulence which leads to shaky footage. If you've flown a fixed wing FPV you'll know what I mean! 😁
The right side arms appear to be upside down the diagonal supports are pointed down they should be pointed up like the way the left side is. Is it possible that you could just flip the arm right side up or is it not symmetrical?
Honestly, I hadn't even thought about it. Now that I have, I think performance might be even better if the trusses are fully symmetric! The arms are completely symmetric so you can install them both ways round.
Very good design, I'm sold. Thank you!
I like that low noise that you've achieved, but no quad is vibration free.
My biggest concern is that the press fit slot joints for holding the arms to the body are going to fragment and wear quickly.
Love my AOS7 for LR running 2x 6s21700 packs in 2p ,, wonder if this frame would bring a big improvement (23min flight time)
It will bring an improvement in performance and weight but a reduction in durability in crashes. 2x6S 21700 or 3x6S 18650 are where it's at for long range 😁👍
@@ChrisRosser guess I should keep the AOS7 cause I do like to put 2x 140c 1400mah Rulines in her and rip it around has been known to make unplanned contact with the earth at times hahaha
Dear Chris, I have a big question for you regarding the AOS UL7 frame! I have the utmost respect for you as an engineer and an excellent practitioner of a scientific approach to FPV. But still, explain to me the difference between AOS7 and AOS UL7? Judging by the name, the AOS UL7 should be lighter than the regular AOS7. But this is not so. Both frames are approximately the same in weight. What is the advantage of AOS UL7?
hi @Chris Rosser,
I think 200hz is way too low at 8:08 of the video. that mean, in my opinion that your frame is not stiff enough. Moreover, your lowest resonant frequencies is gonna make your frame resonate since is in the range of your motor rpm.
I think you'll need a spectrale analysis of your frame and a structural optimisiation. I can see too that there is structural paterns in the arms, I think they are generic and you could optmise them too.
I have many Ideas.
best regards, Robert kevin.
What is that camera stand with ring lite that you use?
LS08 flexible arm and a cheap RGB ring light from amazon.
Should put a damper/strut brace between the struts and it will remove high frequency motor vibration feeding to FC and protect against crash even more, the little locator tabs at the motor mounts being a large weakness in a crash as are of a small area,suffer forces in shear and of a torsional nature.
Interesting design - I could see the vertical arms adding drag in forward flight - would love to see an A/B comparison with a similar 7" with traditional arms to see if that's offset by the reduced cross-section in the propeller wash
When we think about arm aerodynamics we have to remember that the prop has a huge impact on airflow direction. When the quad is flying forwards the air is not hitting the arm from the front. The air is being pushed down onto the arm by the prop. The prop thrust column has a much bigger impact on airflow direction over the arm than any movemement of the quad in steady flight.
Lost my falcon, then got the aos7, I absolutely love it. Is this a replacement of that? Does the regular 7 still have better tuning availabilities? Also Im wondering if the 5UL is able to carry a GoPro mini.
Not a replacement, the AOS 7 is more durable but heavier. This is higher performance and lighter but less durable. Depends what you need.
What i saw in your build is the trusses are not symmetric. On left arm, diagonal links are on compression but on the other side, they are on tension. Wouldn't it create problems ?
I assume you can just flip it and mount it that way.
Experimentally it doesn't create problems (you can see this clearly in the blackbox) but thinking about it performance might be EVEN BETTER with the trusses orientated symettrically. Thanks for the suggestion!
@@ChrisRosser Indeed i am amazed by the blackbox logs, compared to my xl9 frame, yours performs magnitudes better.
Excellent work. I need something like this with a top plate that will support the Strawhat Aerial naked bmpcc4k cage.
Check out the Cine80 to see if that fits (it does have naked bmpcc mounting). If you want an X4 then drop me an email and we'll talk!