The most powerful, most efficient 5" drone motor ever made // AOSRC SUPERNOVA 2207 

Watch Chris's release of his new motor! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WO1D0krt24E.html

Two legends, one video

I'm glad Chris Rosser is using his engineering super powers for good and not evil. Awesome, amazing work!!

At the risk of sounding like a terribly scratched record… we are so fortunate to have Chris. Science is my life, so his systematic approach to optimization is just such a welcome, needed, fresh breath of air in this hobby. I love Kabab and I’m genuinely grateful for his contributions as well. To each their own, but this is the level of engineering expertise that I have always wanted to see. Thanks for helping showcase and share the knowledge, JB!

I’m a controls engineer working with rolls Royce defence and we develop jet engines for fighter jets and aircraft carriers power generation. I’m happy to see another fpv enthusiast like Chris who shares similar background like myself

Dude, I love this guy so much. It is incredible to get engineering insight into how our gear works in a way that manufacturers don't provide. Thanks for going in depth!

Stack mounting; resonance cuts that we use in saw blades. It’s a good idea, with a lot of science behind it. I like it 👍🏻👍🏻

WOW Chris and JB! You guys are so great for our hobby and I love what both of you guys do for all of us! I'm grabbing a couple sets of those motors boys! Cheers!

Chris is just such an amazing contribution to this hobby in total. Love flying those AOS frames... let's see what the motor will feel like!

Ok i m gonna play devils advocate. How major companies developing motors for years, with engineering teams and equipment worth hundreds of thousands of dollars, never heard of Nelder Mead optimization (which is a very simple Matlab optimization algorythm I might add). Chris is a legend, but I am sceptical on this one. I cross my fingers and hope it's the legendary, groundbreaking, physics bending motor he claims it is though :)

I'd love to see him also apply this process to a motor for sub250 builds

Sick. Bardwell, Rosser & Ian are downright the best trio for improving almost everything about our hobby. Keep it going.

Chis Rosser's innovative work is absolutely incredible

The way Chris explains the technology, it makes perfect sense, AND he has the numbers to back it. I already see a few posts where people already have them…

Two brilliant minds, leading the quadcopter world to a better place. Man, this is exciting!

Incredible interview! What wonderful knowledge and information. Appreciate it very very much. Thank you!

These are totally going to be in my next build!

Two kg per motor is nuts, so exciting to have Chris applying his engineering skills!

That frame idea is amazing

Excellent Interview I hope it works out well for Chris he seems like a really nice man, thankyou Joshua👍👍👍

That's a fascinating topic for me. I mean to simulate stuff and then try out in practice. Because then, if you find discrepancies... You make discoveries! Which can make our models and theories even better. 😃 A perfect example of it is cosmology. There's always a huge simulation running at some super computer, while we have things like the JWST making observations that we can compare to. 😃 Thanks a bunch for the interview, Joshua! And thanks for your work, Chris!!! Stay safe there with your families! 🖖😊

This was a learning class. thank u both of u.....................

Chris's motor is going to do very well! He gives alot of time testing for us. People will support him!

definitely gonna be checking them out

This new motor sounds awesome! I usually stay away from expensive motors, but I'll have to get these at some point! I hope they spend enough time in stock to grab them in the future. It would be awesome if Chris made a motor like this for a 3.5"! I bet they'll be a lot of prop deflection, I wonder if we'll need a new line of props in the future to handle both these motors and the general trend of heavier more powerful quads. Carbon fiber props would be interesting, but definitely too dangerous for freestyle. Great interview JB, this is my favorite type of fpv video! I really like the deep discussions about fpv products and fpv theory, as well as the science behind it all! I've watched all of your interviews with Ryan Harrell at least twice.

This is very informative

What a way to look at it Chris yes your motors may make other motors better thank you in advance

Excellent approach to engineering a better motor!

Guys this show was fantastic!

Loved the video! Very informative!!

for chris, vibration isolation: think about mounting gyro/stack not to a bottom or a top plate. mount it in the middle by using for example the standoffs -sidewise. so its "floating" but stiff connected to the sides. the metal standoffs wont bend. OR: use the stackscrews as standoffs aswell. make them screwd to the bottom AND top plate additionally. it wont be likely that this area will bend if its connected in a "cube" bottom and top. its isolated for itself what do you think?

Well done interview JB 👍👍

Chris is amazing.

Great interview ~ 10~30% variability is huge.

the Flight controler cutouts is pretty sweet idea. I could see where the gap would allow it to float. and could control the contact points.

Question is: Will these innovations come to the smaller motors i.e. 2004 or under the 2207?

I'll be interested to get my hands on a set of these to try them out. Chris Rosser definitely has his stuff together and is very knowledgeable, I always fear that efficiency and durability are inversely proportional - maybe he solved this one? Can't wait to find out.

I learnt several things today!

Very interesting video, I have learned something today 🙃

Great talk. There's not a more solid guy in FPV.

how important is deceleration in measuring responsiveness? and is it changed concurrently with acceleration response?

Is there going to be a smaller version optimized for 3.5 inch prop?

Can't wait for Joshua to test these 🤩

I would say the influence of the ESC is just as important as the motors. The choice of components and the matching of mosfets plays a major roll in what happens to the motors. Fake components are also a major problem. Drones being as good as they are in general is something to be grateful for. Nice to see Chris being so enthusiastic on motors I'm sure he'll improve things.

science is alway the key,! great job! I'm looking where to buy the motors in EU :)

Legit the first time im excited to try AOS and rooting for Rosser... in the past ive had opposing experiences to his test result's including his first frame design and motor analysis. Causing me to disregard him completely. I hope I get a chance to see and experience these motors and frame designs for myself

Chris is a treasure

Excited 😆

I hate to be a wet blanket, but 3D printed frames have been using slots like this, and more elaborate cutouts, to help isolate the stack from the standing waves within the frame for years. I first saw them 5 or 6 years ago like this, as a cutout around the corners. They went on to add cutouts along the sides as well to effectively make a self dampening spring.

Those cuts are pretty smart. Allows the rest of the base plate to vibrate, but not pass that into the stack, via a ridgid compliant mechanism. The same opposite of the gyro basically.

So interesting! I hope he applies this same core concept to smaller motors, too! I love rocking motors with a 5mm hub on my 3.5” but motor choices are so limited. T mount sucks (hats off to those of you that can consistently get the damn screws into each hole for each prop, but a single 5mm shaft is just so much easier). I’m rocking xnova, but would love more options!

sounds like the fpv will be perfect with this guy products. will see

I think Gal Kremer can independently test those motors. He has a Tyto Robotics thrust stand

I would only have liked to have a little more images to accompany the words, for those of us who are not native English speakers it would be better. But it is spectacular to see how far this can go, thanks to people like you. Thank you so much

ello! I have the iflight nazgul evoque f5 with a Frsky reciver in it. The 2 antennas in the reciver 1 got ripped off. Should I be worried about it or will one antenna be fine?

The flight controller mount is a neat ass idea.

Ok, that vibration dampening idea is great - brilliant. One of those things that once you've seen it it's "obvious."

do the bells come off easy? i fly Bandos and need frequent cleanings. the RCinpowers ive had dont come off even with the screw off

I'd like to know what power level variance is seen with multiple motors from a specific company, say one of the manufactures near the top. Is the variance a fluke of design or production? What about power draw differences?

Great interview. I would really love to hear about the entire process of filing the patent, including how he decided it was worth the costs... I was always under the impression that the costs were prohibitive.

Pre-ordered.

Durability tests are next. How does it handle crashes into hard objects

Wow! Electric motor designer uses magnetic analysis tools to optimize a motor design! Extraordinary! Whatever will he do next?

Hey Chris, what was the name of the MIT simulation software you are using?

I bought a set 😁 just because they sound awesome 🤯 looks like I'm building a fpv 😁 i have a mini 3 pro 😉 thinking about an 03 air unit to go with my DJI rc. I have been looking at the hobbyking orca as well. Couple months I've been seeing that around. Also saw a speedy bee frame 🤔 master 5 v2 i think. That looked interesting 😁 guess i need to go back and watch some more videos. Thanks for everything guys 😁

That's very interesting, especially the frame stuff - to me, anyway. I fly small quads up to 4" props. Recently, using a commercial one piece frame (2.5mm CF - carbon fibre) I have had big problems with loop stability with aggressive props, had to back off gains a damaging amount. A friend with another similar commercial frame (3.5mm CF) didn't. But, his frame was 33.5g as opposed to mine at 23.5g - a big difference in a 200g craft, 5%. On the basis that the biggest contribution to stiffness comes from mass furthest from the centre of gravity, I then made a frame (I have the CNC tools) from 2x 1mm outer skin CF, with 2.5mm core of 3D printed polycarbonate/CF. Total was actually about 4.2-4.3mm as the 1mm skins were slightly less than 1mm. Big improvement, no stability issues. Carried out some relative deflection measurements and it showed the arms (same XY plane shape) were a lot stiffer. Relatively, my original 2.5mm frame under a set load deflected 0.33mm, my friend's 3.5mm frame 0.11mm, my 4.25mm 'sandwich' frame 0.06mm. not only that, it only weighed 25.5g, less than his. So, a big stiffness to weight improvement. It seems to me therefore that stiffness to avoid coupling into the gyro is very important. In the past on smaller quads (2") I've also got measurably better gyro/accel performance by AV mounting the motors. Of course the downside of the sandwich approach is likely damage in a crash, the arms will be less strong as the 3D printed material does not contribute much to the overall strength. Depends how much one values performance against robustness. The tool I use for designing this stuff is FreeCAD, and that does have an FEM (finite element analysis) module. Therefore since one is only after relative qualitative improvement, it might well be interesting to experiment with different shapes / cutouts using that.

I hope for super efficient long range motors. I'm going to get that 10 inch AOS too I am super happy with my AOS 7 UL.

This sounds good! My only worry is magnetic dust.. There's a lot of that in the bandos we fly here around Denver, can really kill a motor quick when a bunch of it gets into an air gap. But hopefully the less leaky flux ring will help!

Ive heard some people in the hobby speak ill of Chris rosser, one even actually referred to him as a charlatan. I must say though, after watching his motor testing video, i ordered the rcinpower WASP majors (because they had excellent test results)... and they REALLY are the best motors i have used yet. People can say what they want, but my own real life experience backs up Chris rossers testing. I am very grateful for the work that he has done for FPV, almost as much as JB. I trust both of their opinions over everyone else.

This is why I love using this guy's frames. So easy to get jello free video even with the different prop options, including dual blade.

Chris this is great and thanks for the interview Joshua. Chris, have you tested at the edge of tolerance for all of the combinations of parameters that have effect on performance using the digital twin? Have you established the critical to function tolerances? Is there statistical process control on these critical to function parameters at the supplier? You can see where I'm going with this... When you are trying to achieve perfection, your ability to reproduce that would be the next challenge, requiring a very competent supplier with the latest in equipment and measurement capabilities. Cost versus precision and repeatability becomes the next hurdle.

Im interested in seeing JB's test of the motors now ahah

Very interesting, FYI there's a few minutes of dead space at the end of the video (39:58 to 44:23) that you might want to chop out?

I just ordered myself a set and I’m excited to put them to the test, i am curious now that they have been out for a bit if there is any feed back on the live flight pros and cons. What have people seen be the best improvements in performance, compared to what are the negatives (if any) people have run into, and how may we avoid these negatives?

Awesome. I love how Chris dives deep and truly innovates. That spreadsheet though... showing 6 decimal places / 10 significant digits for thrust measurements?

This all sounds great on paper. More efficient means less heat which is great. Now lets hope the bell design can handle a beating.

Just ordered the new ones thanks Chris. I hope to see more of this kind of design tailored to long range and other niche kinds of things

I found a long time ago that switching to 3d printed soft mounts with a firm tpu. Worked way better than purchased silicone soft mounts. Probably for this very reason.

Joshua Bardwell for president!❤

Get this guy a Nobel prize.

if using SLM/DMLS 3D Printing could the weight be reduced without compromising the currant specs. My self not knowing where in the structure to cut the weight based off of the magnetic flux I would not know this answer. But I do know I can cut weight on most all components in the aerospace realm that i have worked on using 3d printing (additive manufacturing) just because you cant manufacture these types of structures any other way. would love to help I am at MiMe Global.

I like the approach on the frame, but could a good result also be obtained by mounting, say, three accelerometers at fwd, mid and aft and then applying some averaging/selection/rejection to the signals and at the same time potentially get some redundancy, along with some condition monitoring - eg chunk out of one of the prop blades, or pick up a motor shaft being bent or a winding o/c or maybe even shorted turn etc etc ? These chips seem pretty cheap these days and SPI bus allows multiples connected without chewing more ports , and so on and so on?

Super cool channel here... Keep this up!

I had a few years ago same idea virtually, but never tested it in production. In the video the cut around is very simple and I believe it is like very un optimized solution. I have been think to properly create mechanical resonators tuned for specific freq. by cutting the frame in very specific way.

It would be great to see blind test of this motors vs xing2.

Cool!

Great stuff! What is the name of the optimization algorithm mentioned at 10:19 ? I don't quite get it clear...

wow! what an amazing salesman!! love it love it heres my CC!!! take it lol seriously , such a good topic!

How can I get the motor comparison chart in the JB info section? 😊

need those motors.

Can you go on a motor making spree? How about the most efficient 7inch or 10inch motors

Logic and rationality are limited to what we know sometimes assume. Breakthroughs happen unexpectedly often enough thru accident. Therefore restrictions for preconceived efficiency can be counter productive. Many proto types are test for unexpected out of the box or reaffirm your expectations. Great discussion !

For a fpv drone radio, which gimbal is the throttle default like, which one is the one that most people use

What if you put additional magnets inside the hollowed out core? 😮

Awesome Video like always, where can I get this awesome T-Shirt Joshua?

I already find my 6s Mark5 to be over powered. I had to detune it (85% max power) and add a huge amount of throttle expo to make it controllable.

Could i spool a turbo charger with that? I need 20k rpm

How do you know you aren't over fitting to the data you are using to produce the digital twin? Much like people over fit trading indicators to a specific market via backtesting? Its a problem manually as well as AI. Curious to as what you are doing to prevent/mitigate this. Either way, love the video

Interesting video. The method Chris has used here is very similar to the way neural networks (/AI algorithms) are trained to do whatever they do so it's not surprising that the tool he used is to wrap the MIT algo is 'borrowed' from that field. I think more and more engineering is going this way actually. Come up with a digital twin and throw millions of tweaked model variables at it.

I think I saw that design somewhere. Not sure if already patented, just saying. Maybe CD driver motors ?