How I OPTIMISED the 5" FPV Motor with SCIENCE: AOS Supernova 2207
ฝัง
- เผยแพร่เมื่อ 24 ก.ค. 2024
- If you value the work I do: patreon.com/chris_rosser
JB Interview: • The most powerful, mos...
Where to buy: AOS Supernova 2207
Global: www.aliexpress.com/item/10050...
USA: www.defiancerc.com/collection...
UK: www.hobbyrc.co.uk/aos-superno...
EU: droneit.se/product/aos-supern...
Timestamps:
0:00 Intro
0:31 The Design Process
3:05 Bench Review
5:40 NOT a 2207? SCANDALOUS!
6:33 Thrust Test Data
6:41 Measured KV
7:02 Motor Performance
7:35 Max Thrust
8:22 Efficiency
9:17 Max Torque
10:14 Responsiveness
11:21 Weight
11:46 Conclusions - วิทยาศาสตร์และเทคโนโลยี
![[ไฮไลต์] ฟุตบอลชาย ฝรั่งเศส vs อเมริกา รอบแบ่งกลุ่ม | โอลิมปิก 2024](http://i.ytimg.com/vi/oZ9aSS0NEEg/mqdefault.jpg)
Interesting progress. After testing maybe 100 motors over the years of all sizes in the field, and in competition, started to come to conclusion that for a modern pilot with modern gear (post 2020ish) it almost doesnt matter. None of us can take full advantage of the speed/power on a track other than maybe a dozen people at the top.
Still welcome progress if it helps move us all forward.
Best comment! Thank you!
It is good to be able to technically land on the 'solution' to the source of so much variance in motors available though, at least so the industry can then focus in on what actually are good configs using actual result data and move on to innovating elsewhere.
I agree @JonE5FPV in fact I think a majority of fpv pilots out there would fly better if they had less power in their builds. The top % can take advantage of almost all advantages, but everybody else - nah.
Same with motorcycles lol...
@@jollyrogergaming9842 yep, honda put a throttle sensor on the bike, and discovered the rider only used full throttle for about 2 seconds. so downsized the engine, and weight, and made a bike that went faster since it ran full throttle much more often.
Well done Chris, good to see there's still some room left for improvement on brushless motors despite their design having seen many revisions over the past 20 years.
Please extend the range of motors in this series! Imagine a "Hypernova - sometimes called a collapsar" motor, made for 7-8" drones like long range or cinelifters! Man, that would be sick! Or a "NOVA: A white dwarf star" motor for 3" or sub250gr drones! Man I´m exited!
I would love to see a whole line-up of motors utilising the principles of the Supernova. A 15 or 1404 around 3600kV for 3.5" 4s, 1204, 7500kV for 3" 2s and 5000kV for 3s and 2006 2900kV for 4", 4s and a 6s equivalent as well.
I'll do my best! 😁 I want to do a 2808 and 1404 class motor as well
Something for the rc plane hobby would be amazing. 2212 size or even bigger like a 2820 or 3820 would be a huge gift to the modeling world.
@ChrisRosser if you're taking requests, a 2808 1k would meet my 7" 8S LR needs 😊
@@ChrisRosser great! I guess the best showcase for a new product is to stack it up against some tough competition - both 2207 and 1404 (don't know much about larger quads/motors, so no comment/opinion about the 2808) have pretty tough line-ups!
Regarding what you said in the interview with JB about optimising your 2206 for maximum performance while maintaining the weight - asking ppl what they want is not always the best way, ppl often don't know what is they really need - the less experience the more likely they will ask for more power (look at cars), but with more power they will struggle to both tune and fly - this is why the 'smooth' motors have had their following.
I personally think optimising for minimising the weight, while keeping 'average' performance would be a more interesting direction - the power you are used to, but reduced weight and faster response - this is IMHO what freestyle needs, optimising for performance has more merit at racing.
Great job, true gem, lucky to have you in this field unlike others who uses only predictions to demonstrate the results of certain motors and props on how well they performs in real life. Against all odds keeping going forward with your honesty and hard work as it pays itself in time, better than you expect. Doesn't need anything more than you have, will attract new people coming to this field to your work. Always love from us.
Don’t call it 2207 if it’s not 2207…. FPV Cycle just gives the motor a name, which isn’t great, but is better than mislabling.
Otherwise this looks really interesting.
Edit: I really appreciate what you are doing in FPV, and testing everything instead of just being a hype man. Just add “class” to the name, especially on the pre-order pages, and I think you’re fine.
I like Chris Rosser, but was kind of hoping the top comment would be the motor measurements
100% Pretty misleading to put it in the title, even though he does say it here (not everyone who buys this motor will have watched this video).
Also kinda ridiculous that he wants people to keep the actual size "secret". It's not like there's gonna be this "magical" set of dimensions that are somehow better than any others. It's also plainly, physically measurable, so it's likely not gonna be long before someone does publish it.
@@dooddrones6521 It’s 34g, and the FPVCycle 25mm imperial is 35g, where the Five33 2207 is 28g. It’s not a crazy difference but certainly for the weight it seems like it should be bigger than 2207. The steal doesn’t help the weight, but appears to add power.
What part of 2207 class do you not understand?
@@cinemoriahFPV Title is “AOS Supernova 2207” not “AOS Supernova 2207 CLASS”. I think I’d be ok if “class” was added to the name. Though Five33’s 2207 is 28g where this is 34g. But ok it’s maybe it’s more durable. Even the pre-order page just says “2207” not “2207 class”
Chris, this is something truly exciting to me. I studied Aerospace Engineering and one thing that really stuck with me was a lecturer's advice that one way to really be valuable as an engineer is when you can not only find a good solution, but use numerical and/or analytical processes to find what you believe to be the best achievable solution for the design requirements and available technology.
Now I wonder if you could apply this model and process to optimize for a smaller motor class, such as for Sub-250g builds?
Amazing work. Thanks for pushing innovation forward in this hobby.
Though I do think developing some type of standardized durability and reliability test benchmark will be highly valuable.
Good job! You really demonstrated your amazing engineering skills and enthusiasm by perfecting the quad engine, which, according to almost everyone, was already as efficient as possible
Oh Man, I love the intro :-) what you described is an excellent engineering design exploration exercise with prototyping and manufacturing… would love to know more about the FEM you have written to test the virtual models. Great stuff!
I don’t know about this not sharing actual stator specs. I mean, if it’s a 2208 of course it will outperform a 2207. But calling it a 2207 would be a bit disingenuous. So is it a 2207 or no?
Ultimately stator proportions are kind of a meaningless metric. It's not stator proportions that make drones fly, its power vs weight. If it weighs the same as other 2207 motors then it's reasonable to compare them. He doesn't want the stator specs released because he'd like this motor to actually be on the market for 5 seconds before getting cloned, which will happen anyway, he's just trying to slow that down a bit.
Since it has the weight of 2207 with a much thicker flux ring, I assume the stator is actually smaller. I also assume if he released a 2106 motor or something like that, all the talk would be about the size, how it's super heavy for the size etc, instead of focusing on the results compared to 2207 motors.
All just a guess ofc.
@@Kai-P Yeah, I think the goal is to move the talk away from the size as what makes it unique.
Definitely agree, it is like calling an 18650 battery although it is not 18x65mm size. Yes perhaps the motor size means nothing but then do not give size at all. To be honest publishing the dimensions now would not make too much of a difference given that those who want to find out, will find out.
@@jovaraszigmantas an 18650 being a different size would make it incompatible with many applications. An FPV motor only needs to have the right mounting pattern to be compatible. The 2207 name is used because that's what people search for. Can't sell a product no one will find.
I’m totally putting these motors in my next build! Amazing work Chris!
Excellence is here as usual, Chris. Thank you. I just ordered your motorz ! ❤
Great work! Already exited to have them.
3.5inch quads are getting more popular now, would be cool to see the best motors for them too.
Go check recursion labs
T-motor 1404 for super light 3.5 inch
@@xnoux1yeah, but key word was "the best". Im happy with xing 1504s.
@@pixonification he did the same kind of testing than Chris but for 1404 motors. Finding "the best" for 3.5 inch.
Anyway, if you’re happy, I’m happy.
We are so lucky to have this man in our community. Thank you again sir! Def buying a set or 12
I am definitely buying a set to put on my AOS 5 v2 can't wait., thank you for all of your work.
Wow! The Productpage of the AOS 2207 on your Website is absolute phenomenal.
Very cool. Thanks for all your work!
That's amazing! Would love a smaller motor as well.. Perhaps something like a 1405 or 1604. :)
I'll see what I can do!
Echoing this, something for 3.5" sub250.
@@ChrisRosser1504 would be a cool size for 3.5 inch drones
@@ChrisRosserI still didn't get how it got that design increased it's all round specs?
Yes Please. For the AOS 3.5 with an o3...
maybe a 4" biprop... @@ChrisRosser
Oooh, looks like an interesting motor! Is there interest in something similar in the cinelifter size? With that kind of thrust might also be interesting in the larger cinewhoop class carrying a Komodo
Well done Chris! Thank you for the innovation 👍👍👊
I would love to have a set but not for 130 dollars if you include tax & shipping. Especially if i don't know what the true size is. But they look nice. So Bo how many did you pre order? hahahaha i know you love that power! and will want a few to try. You be sure to let me know if this hype is real.
Good advertisement video. You sold it to me. 🤣
really exited about it. Grettings from germany!
If you're the one, who did it, Hats off! Please Make Brilliant breakthroughs like this! The world is waiting for people like you, but it just ignores many of them!
Well done Chris!! Good reverse engineering, perfect knowledge and aplication into design. I hope RCinPower will share with you some of the benefits :P
I like the Motor and its stats but i hate the scaled Graphs
Ah that'll be Excel's "auto scale" at work!
Thank you for for making these motors run so great
4:35 Surprising you're able to get higher acceleration while adding a significant amount of semi-dead weight at the outer radius where it has maximum inertia. Most of the motors I checked had very little field leakage measurable by linear hall sensors on the outside of the rotor, so I figured the flux ring thickness was already into diminishing returns in terms of magnetic performance.
The total inertia of magnets and flux ring is only very slightly more than a typical motor but the extra torque is 33% more so that dominates.
Nice motors! Are you going to design more for other prop sizes or different KV's? I'd love to try something designed for 6/7" props!
there is SOOO much talk about this motor. hope it has the durability edge too - sounds amazing
Excerlent knoweldge well done Chris i realy hope this works out well for you.
Please make a 1604 for 3.5" props!
This is the most excited I have been about a motor in years. Congratulations on your breakthrough. Do you plan to optimize other motor sizes? Do your tweaks to the modeling software work for larger rc plane motors? It would be amazing to see new 2212 sized motors built for efficiency and power. Amazing work! Thank you for sharing!
What breakthrough? He made 2308 motor and called it 2207. He also compared it to 2207. If we exclude the weight, of course the 2308 will be better than the 2207.
@@vdz89 I mean.. did you watch the 12 minute video above? Compared to 2207 motors of the ***same*** weight class he has produced a motor with better efficiency, power, and responsiveness... for no additional weight... you know... a breakthrough... I think it is mentioned somewhere out there he actually used smaller magnets and a thicker flux core or something like that rather than the industry's trend of bigger magnets and a a thinner flux core. Also, his stator core is hollow, between those two weight savings it allows his physical dimension to be slightly larger while gaining no weight. So it is a motor that spins a 5" prop that weighs the same as all the other motors designed to spin a 5" prop. The reason you don't compare this to a 2308 is because they weigh more... Here, I found the video where he gets into the more technical design decisions: th-cam.com/video/yxZZ2M3gRyI/w-d-xo.html good luck trying to watch a 40 minute video though.
Hi Chris, congrats you with a new awesome product! Thank you for your huge contribution to our hobby! Could you share what tools you use for digital twinning?
Amazing Chris! 👏 very beautiful job!!
Amazing work!
Hello Chris,
Your great/hard work has paid off. Congrats!!!
I was curious what simulations software you used to design this new motor. I am starting on my journey to learning electric motor design, focusing at the moment on the axial flux motor type. I will be using it in a micro-mobility vehicles. I find your way of thinking about the design process very forward looking and am interested in learning a little more about it. Well thank you for your time!
Isaiah
You are so great. Thank you so much for your work. 🚀
Congrats! Great work!
What about a 4S version, higher KV?
@ChrisRosser Thank you for your diligence and contribution.I just ordered a set today.I was wondering if and really hoping you could recommend some BLHeli32 ramp up,timing and pwm settings.
Yeah Chris Rosser! Can’t wait to try these. Peace and love from Rhode Island
I can imagine how excited you are for these. I’m excited for you
Would love to see how efficient of a motor you could build if you wanted it to produce the same average TQ and thrust in comparison to an average 2306. Not everyone needs the power but if a line of motor was designed to be the most efficient motors, it would be something I would love for my live TV gigs. I'm filming for NBC & Peacock again this year for the professional supercross and motocross events. Always looking to gain every minute and second I can to stay in the air longer.
Great work Chris! Finally someone designed a FPV motor with the magnetic circuit in mind. I too am a designer working on a new class of EDF for RC & drone market. I'm going to be using your motors. It would be nice if you designed a new motor keeping in mind your work ethics to work with this new class of EDF. Wish list... high torque, very high RPM (the highest possible) smaller diameter and to compensate longer length if needed. If possible consider axial flux. Also look into the benefits of ultra pure iron (99.995%) laminations over silicon steel laminations or metglass for the flux circuit. Keep up the great work!
Very well done Chris. A sharp mind + Science & engineering and computer modeling is the way to optimization.
Why do we not see any axial flux motors yet? Should bring down the weight and increase efficiency even more.
what you do and the way you present it is outstanding..... please keep it up
Your patented vibration isolation design looks cool too. It made me think of what a gyro silicon looks like under a microscope.
I'll be happy to test these out for a bando certification 😊
would kinda prefer the y-axis on those graphs to start at 0
very impressive motor though, any chance you'll do one for tiny whoops next?
Fair enough, that's Excel "auto scale" for you 🤣 I'm sure this approach could be applied for tiny whoops.
Please make a version for 7" props and the AOS UL7
Please do a comparison against a motor with the same dimension (with, height) stator.
Dear Chris, first of all: huge fan, your tuning guide made my quad fly like its strapped to rails!
I have a quick question about the optimisation of prop efficiency. It is common knowledge that an airfoil generates lift by having a higher airflow on the top than on the bottom. When building RC Wings you sometimes hear a Foil generates even more lift when its surface is rougher on the top than on the bottom since the airflow gets slowed down even further. Is this also true for FPV Props and is there a chance you could test that with your thruststand.
I thought of using the same prop twice in a row first in its original state and after working on it with sanding paper. Preferably with a prop of size and weight where the material loss doesn’t significantly affect the weight.
Although I don’t think the effects will make difference like day and night, but for tiny whoops where every gram of lift matters it could be a new aspect when it comes to Propeller efficiency.
I already spotted those motors on your site ;)
Those values really proof that nobody has done FEM-Optimization for those drone motors ever before... and it makes me wonder how much more this can be iterated forward... Imma building another drone I guess :P
Do you think the key design principles can be applied to other motor sizes, like for 2.5" or 3" props, and get similar performance deltas? Or would that require a new sweep of tests, data acquisition, and FEA optimization for that specific prop size?
We totally need better micro motors! All the way down to 070x please ;)
I think the model should be good across different sizes (I'd need to check this) so it should be possible to optimise motors for any size.
@@ChrisRosser That would be amazing... :)
Have you considered turning the struts that hold the drums in too propeller shape for cooling if left in the shape they are now they hold the potential for deflection of the air that would potentially cool the coils?
Great work!
I really enjoy watching your videos and learning about your process for improving designs but can’t help but think how well this would pair wit how Bob Roogie designs motors. How you select a motor could be used to find a few motor designs that could then be tested. I have yet to see any real world reviews or tests of your motor. When you say that your motor is a certain percentage more efficient, it kind of sounds like I should be able to fly that percentage of time longer if I’m just cruising around but we both know that is not how it really works. Would be nice to see a variety of motor sizes, especially motors sized for sub 250.
What would be really useful for fixed wing pilots is knowing what the max reasonable amps it can run would be. Eg could I run this with a 55x65 prop on a race wing, will it handle a 6x4 etc
@ChrisRosser what esc are you using for you tests?, will a 45A esc be able to push 60A to the motors?
Congrats. Very impressive engineering.
I don't understand why you would not publish the motor dimensions. _Literally_, every motor is listed by their stator volume, but then you start comparing it against motors that are listed by their stator volume. Yet, yours isn't, so it isn't a valid comparison.
I get that you are trying to sell your stuff, but it feels like you are hiding something. You are using numbers to prove your point, which is good, but again, why obfuscate the most basic of motor information.
FPVcycle does the samething.. They list a 25mm motor, what is that? What does that mean? Can we compare these motors?
Keep your secret sauce, but if you are trying to take the mantle of motor tester and educate us all on what makes a good motor, then at least help everyone get there.
I think of it like this: there are performance numbers and design numbers. I'll happily publish all the performance numbers, power, weight etc. Everyone has a right to know the performance numbers to make a good choice. Design numbers have no bearing for the pilot (except as a substitute for performance data) but make it easy to copy the product so they are kept secret.
This is amazing! I had this one question for some time, seems like a good moment to ask : did you try to repeat same motor tests to make sure results are the same ... say a month later ? Of course there may be a drift due to ambient temperature or ambient magnetic field or something like capacitors degradation over time. But do you see same pattern between different motors if you redo motor bench tests again ?
I tested multiple samples and have retested motors over time. In general the results vary by up to 1% over time.
Chris Rosser is a good designer, but he's an even better marketer.... Why call it 2207 while it's obviously not a 2207 ? I first read 2207 in the title and ask to myself "strange, 2207.5 performs better for 5inch"... then I see the first shot of the motor and i'm like "wtf it looks like a 2208 or 22.5 08".
Just call it AOS S5 (for 5 inch motor) or something so it's not confusing...
2109
How can this be confusing? The best performing 2207 class motor you can get.
Need an aos 7" motor 👀
I'm interested in the design and analysis tools that you used and your reasons for that choice.
Nice, what tool from MIT did you use to simulate the motors?
Hi Chris could you please plotand show the efficiency curves over the full RPM range for the 3 motors. I have found efficiency to be far from linear and very different curves between motors. Also the minimum startup RPM current can be very different between motors. I fly only full throttle very sporadically just for power loops punch outs, so i select my motor to be most efficient at 30-40% of RPM and less effiency at full throttle has minimum effect for me. (i am not a racer) For long rangers and for (small
The design process is super interesting! I assume the same process can be used to optimize anything? What software did you use for the FEA?
"If you measure the product dimensions, don't publish it" WUUUUUT
Why even ask that, now I want to buy one just to publish the measurements
Just click a link, and it has a diagram with measurements on?
It’s a genius marketing ploy!
Stupid fuckin' decision tbh
Haha, You don't get to know
glad i found this channel.
Also was wondering does the the polarity reverse in order attract and repel so that power is more evenly distributed as each armacher passes a magnet or are they just atracked to the magnet and then turn off. Or is it possible to reverse the power on the individual armatures/coils
hi Chris, could you do a video on the simulation software ?
Given that its not 2207 I don't like the naming. And calling it 2207 class to me doesn't mean a whole lot as 2306 and even 2406 motors are largely lumped into a similar class as 2207. It'd be better if they were just advertised as a 5inch high power motor. Then you would also be able to make better comparisons with 2306 and other 5inch motors to really see where it lies in terms of performance. Not saying there is nothing special about this motor, just that the naming is poor and there is definitely more room for better comparison testing.
I agree 💯 with you. Unfortunately, one person cannot decide how motors are named and sold in the hobby. Pilots are searching for 2207 motors for 5" quads so this motor has to be called a 2207 to show it's for the same purpose. I wish this weren't the case!
@@ChrisRosserthats bullshit. Before 2207s, people were running 2206, 2305s, 2205s. Make a good product, and label it truthfully and people will use it if it's good, no matter the size. But the arbitrary value for the size is dumb
Or do like T-Motor and name it something else. Like the F40 Pro V - 2306.8
@@harrylenon9594 I just looked through many drone motors for a fixed wing application. Size wasn't even a consideration. Motors without published technical data weren't considered. It was easy to find something for the application based on weight, Kv, and resistance, mainly. The same way I've done it since NiCd was the only battery available.
@@ChrisRosser I disagree the tmotor f60/f40 sold very well. Same as the fpv cycle emerald motors. None of those motors listed their size.
just one world WOW, i'm waiting so hard to test it !!!
just one question, what is the best props for this motor ?
Hello Chris, you showed a 10" frame during your intervju with JB. When will it be available?
Hi Chris. Can you write down in the comment the link for the MIT FEM app? I couldnt google it... Im in my last year of mechatronics study and we have a course on electric motors and drives. I would like to play with it and have a chat about it with my teacher. Thanks a lot. Im also impresed by your approach to these things. Like I learning about it in school but you are the first person im seeing it to use on drones :D Keep it up!
Great job!🎉
In my drone projects I am focusing mostly on efficiency, not the power. Can you share efficiency against the most efficient motor you have tested?
Thank you!
Chris, I really liked the innovations, flux ring, high temp enamel, and the shaved mount areas... but not sharing the stator size is not a good idea, because people will think this is much larger than a 2207... which might explains some of the improvement...
Did you have shave the mount weight to compensate a larger stator?
Nevertheless I expect that they are amazing still... great engineering work as always, and great work on model based design...
It's clearly a smaller stator if it has so much more steel while being almost average weight.
The size doesn't matter. Only mass.
@@rcdieselrc durability also matters and the bell and magnets are thinner
Strong Work CR 💪🏽
Would be fantastic if you could apply your process to 07/08 and 10/11mm BL motors as well. And would similarly be a game-changer if you could also model/refine video antennas.
what would you like to do with video antennas? RF is much more complicated than BLDC motors. Too complicated for chris.
@@sigterm15His contribution would in come in the form of the modeling he does - finding that undiscovered needle in the haystack.
great being able to get in uk for the same price or cheaper, can't wait to try them😋
Congratulations on the product lunch. Really interesting motors and curious to see how this will affect motor development. The level of engineering is insane.
One comment/thought on the motor naming/size. To me, not being an expert on this, it looks a bit odd. If the motor doesn't follow the traditional size convention, isn't it a bit like comparing apples to oranges? Comparing a larger size motor to other 2207s would most likely also yield results where the larger size motor performs better. Maybe I missed the part in the video, but could you explain why or what determines this motor to be in the 2207 "class" even though it is larger in size?
Really enjoying your videos. Thank you very much! 🙂
Ideally motors would be labelled by their weight class. A heavier motor should give more performance than a lighter motor of the same dimensions. Unfortunately we live in the real world where people buy 2207 motors for 5" drones so this motor had to be called a 2207 to clearly signal what the motor is for.
Thanks for all what you are doing for the hobby !!
Time to change motor names now that weight is all what defines a motor :)
We will have the AOS34 race which is more powerful, the AOS34 freestyle more durable and the AOS34 cinema with a pancake geometry :)
You are the G.O.A.T Chris thank you for your work and your videos 👍
My motors were delivered. Which ESC do you guys recommend for highspeed? For example: Hobbywing XRotor 60A, Lumenier Elite 60A or something else? Looking 30x30 for Five33 Switchback HD.
Very curious and going to be testing this vs my current MCK motor on my racers. Is this correct?
Motor 1 MCK (Higher KV 2100, Lower Thrust): Assuming the KV is the actual KV It's going to give you higher top-end speeds because it can spin faster (higher RPM). However, its lower thrust means it might not have the rapid acceleration you'd get from a higher-thrust motor. In a straightaway, this is where higher KV shines. For freestyle pilots who focus on sharp, fast moves and less on lifting power, this motor would be more appealing.
Motor 2 - AOS (Lower KV 1980kv, Higher Thrust) compared to motor 1: This motor is your powerhouse. It won't hit the top speeds that first motor will, but it'll get to its top speed quicker due to its higher thrust. This makes it ideal for tracks with lots of tight turns where rapid acceleration and deceleration are key. For freestyle pilots, the extra thrust means more lifting power, which can be useful for complex maneuvers or carrying additional gear like high-quality cameras.
Handling/Speed Differences:
Racer: If the race track has long, straight sections, Motor 1 will give you that high top speed. But if the track is tight with many turns, AOS would probably serve you better because it'll get you back to top speed faster after each turn.
Freestyle Pilot: For those focused on agility and quick flips, Motor 1 higher RPM offers an edge. AOS would be better for those looking to carry extra equipment or perform more complex, torque-demanding maneuvers thanks to its higher thrust.
Would be helpful to understand it in context of actual flight as well as opposed to just a bench test which is much appreciated, I'd like to learn more about so what. I'm only addressing kv and thrust but would be nice to understand how all the factors play together in flight performance.
OMG !!! NICE!!!!! SO very excited!
heck yes, i cant wait for the 7inch and 3.5inch motors, your frames really do rock, you should send a set of these motors to mrsteele rofl!
Can you pulish the efficiency curve at 6s wit some of the props you tested? From the data on the webshops it seems that at max thrust the efficiency is really bad. It doesn't give it justice, given that max thrust is considerably more than the rivals.
Hi Chris, any plans to produce a ~2500kV version for 4S?
What about the tuning ? If i change to this motors for my aos 5" what should i do with the tuning?
Hi Chris, I have bought motors 2207 1980kv and I have noticed that motors are heating and pretty hot after flying, is it fine?
Is there a way to put another set of magnets on the inside, in the hollowed out core?
Have you looked into using a halbach array on the bell? I'd be curious if the directionality of the magnetic field would be worth the additional complexity.
Great suggestion 👍👍
Hey Chris. I'd love to see a couple of graphs (thrust/watts/rpm etc). Is that something you would be willing to share? Personally for freestyle I'd prefer something lower kv for the sake of efficiency and it not overheating. I'd be keen to see how this compares
Very cool man! Im going to try these for 3D Flying. In the 3d world alot of us have a hard time picking a good motor that can switch direction efficiently. Cant wait to test out but ill have to switch to 6s as I use 4s Hypetrain Acros and they dont seem to be the best..
Now I have got pretty excited. The EU source is actually a Swedish site, so I can purchase this one the easiest way ever (located in Sweden). Is it manufactured by RCinpower? The datasheet looks similar in graphics.
Super interesting motor! I love the thought process that went into these. Three things I wanted to mention: I thought you said it was going to be $25 but it looks like it is $28-$29? Also, I think a black version would sell great too. I think some people take the color of the motor into account and it it’s doesn’t go with their TPU colors, they don’t buy it. Lastly, I think you would sell a lot of them at RDQ or GetFPV in the USA.
$25 for a pack of 4
I would love to have these for my first "Secret" 5 inch🤫 faa....😁 however I would really love an 1804 4s version for a sub 250 build🙏🏼 awesome motors ✌🏼
Do you plan to make optimized motors in other sizes and/or for other sized props? Given this is the optimal kv to efficiency for this size motor and a 5" prop...if you are targeting a different kv would you then change the size of the motor? Many 3d printed RC airplanes use drone motors. In this way we can move the battery more forward to better balance the plane on the CG. So I'm always interested in more efficient motors given how much planes fly at full throttle when flying combat models.
This is very exciting. Would you be willing to go thru the process you went thru to file the patent? How were you able to justify paying for the patent process given the costs of filing?
My friends just tested them on the track and confirmed improved handling and cooler motors. Is there any plans for a race version? The motors are a bit heavy around 2.5g heavier than a typical race 2207.
They are really nice for racing apart from the slight weight overhead. We found ~8g (
I love the thought that went into these motors. It seems like they would be more geared towards racers. At what point does a motor produce too much thrust, where you lose all throttle resolution? I have a shoebox size tote full of motors. So far my favorite is the 2306.5 by newbeedrone. Perfect balance for proxy and punch. As others have stated, it would be amazing to see a full line of your motors.
With throttle expo in betaflight you can always adjust throttle resolution to fit your preference no matter the top end thrust👍
Great Work Chris! Thats why i love this hobby! You said its impossible to burn it out. Me thinking smashing it with 7s or 8s for a speed demon. 😂😂 Challenge accepted.
Chris, you are legend!