Who makes the best 5" Motor? AOS Labs 5 inch Motor Testing

AOS Labs motor testing! www.aos-rc.com/5-inch-motors
Looking for FPV product recommendations? www.aos-rc.com/recommended-parts
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Timestamps:
0:00 Intro
1:11 Test Equipment
3:47 Why AM32?
5:57 KV Testing
7:44 Dyno Testing
11:53 Thrust Testing
15:05 Do they have an EVEN BETTER MOTOR?
15:44 Responsiveness Test
19:03 Total Scores
21:12 Magnetic Field Strength Testing
25:13 Air Gap
27:09 Outro

[@ChrisRosser]

If you're a manufacturer (or a pilot!) and would like to send me a motor to test and add to the AOS Labs charts please get in touch on aos-rc.com 👍

[@xforce9927]

Do you want to test whoop size motors as well? I'm thinking of maybe 0802 to 1102. RCinPower has a promising 1002 btw

[@BBFPV]

It is called Teslameter since 1970 imao i think 🤣

[@ariafpv]

I'd like to see how Xnova motors perform as they are pretty much without competition in their price range

[@RyanEssonYoung]

Manufacturers are scared... :) Amazing content and delivery. Thank you.

[@MactacFPV]

Hey Chris - I sent you a message. I run Camera Butter.

[@marcosmartinezgarcia]

Chriss revenge to Mr Steel talking bad about AOS 5. xDDD

[@sykkel_martin]

Just facts 🤓🔥 Love this

[@steamvogue]

I personally also dislike all from Steele . Blown up overrated pilot .

[@lemonsquareFPV]

Well, now we have the AOS5 V2 :p Chris did a great job in making it able to fit basically anything you want, that’s why I have borrowed his bottom plate for a tube arm 6” freestyle build.

[@bugsy742]

@@steamvogueoverrated? Nah mate you’re talking out your arse there! Rosser ain’t gunna suck you off bro! 🙄

[@tristanfpv30]

@@steamvoguehe is probably better than you

[@baggszilla]

Unbelievable work Chris like always!! We need a video showing us how to flash our BLHeli_32 ESCs to AM32! Thanks and Cheers!

[@CgitEinsteins]

in other video, mr steele says aos frame is complete b*llsht and in this video, you say mr steele motor is b*llsht this is elegant wars.. love it

[@RideNFly_FPV]

Thanks for all the work you're putting into this Chris! Great information and I love how your enthusiasm comes across.

[@antonioalemar5406]

Once again Chriss, you knocked it out of the park. Absolutely brilliant and next level testing and analysis. Love it!

[@erikvf7]

Great video and initiative, Chris! Really appreciate. I hope this motors list gets bigger and bigger with more brands, and also the cheaper ones as well.

[@merlin_fpv]

Well done, Chris! Long time fan here, and this is my favorite and most interesting video you’ve posted yet. Perfectly executed. I’ve been flying the wasp major on all my freestyle quads for over a year. It’s a fantastic motor and it’s hard to describe to the feel of it. This quantitatively explains it.

[@billyocean9236]

Amazing testing. Truly clinical. I am thankful that the hobby has your support and interest.

[@chrisegal5481]

A pleasure to watch! The most impressive Motor-test-video by far. Thanks a lot

[@MCsCreations]

Really interesting results indeed, Chris! 😃 Thanks a bunch for all the testing!!! Stay safe there with your family! 🖖😊

[@HeroRc]

Chris, thank you for all the effort. This is a liquid gold kind of content. It would be also useful to see the price adjusted score

[@ActiveFPV]

That is a great job. I had a tested alot of motors for the auto industry before I retired and your dyno really brought back memories.

[@slowentropy4531]

Amazing video, all things aside I really learned a lot from just the way you explained your wet up and method. Awesome work mate. Cheers and may 2023 be a great year for FPV :)

[@dutchfpv7010]

Separating the science from the hype. Phenomenal work. You continue to confirm our suspicions and open our eyes to new information to put to use. Please keep doing what you're doing. It really empowers the community.

[@josephshackleford1]

Great video, thank you so much for the tremendous amount of work that went into this.

[@0120shrey]

This is exactly the kind of testing we needed in the community! An interesting test could be you putting the best motor-ESC combination against what was available back in 2014, Emax MT2204 and a simonK ESC, and similar combinations

[@dinosabic5383]

This is amazing! Wow. Thank you so much for all you do!

[@RecursionLabs]

Glad to see others focusing on motor and propeller testing. Great work! The message that's been propagated saying that motors and propellers of the same size and pitch have a negligible difference is so untrue. One observation I've made when measuring Kv is that it is very important that you do the test really quickly (burst and measure) since heat will build up under no load and start affecting the accuracy of the test. This is probably less of an issue on larger motors with a lower Kv, but it makes a huge difference on smaller ones.

[@lemonsquareFPV]

Great point, I work on FPV motor design and can tell you that there isn’t really a standardized KV test. Some manufacturers use KV as a feel and not directly measured. Some use spin up at different voltages and Some are like me and measure Back EMF at different RPMs :p LoL It’s all over the place, having worked with almost every company, it’s funny. Some also don’t measure and bracket magnets and take specs as gospel 😂 And some have a hard time winding consistently :p It’s honestly a mess… that’s why I carefully spec my motor designs, even then, I still test everything, because I have been bit multiple times :p

[@hanelyp1]

Would it not be performance with the motor warm that matters more in flight?

[@edrone_]

One of my favorite series from you is your thorough motor testing videos. This is exactly what our community needs to keep everything fair and honest. The results surprised me as well. I have been using the Emax Eco motors for a while now and since their performance is pretty much middle of the road I'm quite happy with the results from that especially considering the price And I usually break motors a lot lol. Great video and you explained everything so well. 👏👍👊

[@k4x4map46]

man you hitting all points--I was just thinking about durability vs. the tight airgap!! amazing!!

[@MrChangCJ]

thank you for doing this, and sharing your results so freely. this pushes the industry forward as OEMs know they are under scientific scrutiny.

[@AB-sk4kz]

Keep going Chris, massive thanks I really enjoyed the video.

[@MichaelRogersJesusrules]

Heaps of fun,probably not so much compiliing the vid but that was great, i loved every minute. keep up all your cool work and thank you for sharing, cant wait for your next.God bless!

[@spikester]

You are absolutely amazing, thank you for keeping the hobby honest, sensible & authentic with transparent testing.

[@spikester]

Motor quality control could be tested by testing the same motors of different batches, I am curious how different it will be out of a batch of 10.

[@bugsy742]

@@spikesterthis! 👍🤝

[@NickRO19]

Great video, very informative. I'm looking forward to seeing the testing of the RCinPower V4. Also I'd like to see some more testing on the Xing2 1855kv which was a motor you used on your AOS5 BNF, and the ones I bought for my own build on your frame. Videos like this drive motor manufacturers to bring better products or at the very least, make their prices more competitive. Thank you and great job Chris! I think what people would like to know straight up, is what is the best motor for each style of flying. Best for racing (performance), freestyle (durability and performance) and cinematic (consistency and smoothness)

[@mhe0815]

This is so awesome, thanks for going through the trouble of performing all these tests and getting us all that data! On a sidenote: This must feel pretty darn ironic but good for you, given how Steele talked shit about the AOS 5 when it came out...

[@xORLOCKx]

Data to back up my love for Tmotor! Thanks for all your work!

[@jameswho5517]

Solid info Chris, love Labs!

[@k4x4map46]

very comprehensive testing and analysis that's for sure!!

[@VadimBryksin]

Awesome work! Thank you!!!

[@sarahdaviscc]

Great video. Love your scientific approach.

[@WEEBER13]

ABSOLUTELY FANTASTIC RESEARCH! 💯❤

[@justhackitfpv]

Thanks for using Skystars AM_32 ESC for your test glad you liked it so much

[@danielnoname8352]

Awesome test Mate 👍

[@ugpfpv361]

Thanks for all you do!!! Also would love to see the hyperlite eco motors added on you next round!

[@dave3883]

This is an awesome video. Thank you! (headed to patreon) 👍👍

[@z-collector7518]

Thank you for all the hard work! Great test, very informative video. Mr. Steele must be shitting bricks by now :)

[@modquad18]

Might have to change his name to Mr Styrofoam

[@b.w.oostdam8875]

Thank you so much! Very very interesting content!

[@SpringHaIo]

To get an exact comparison of air gaps you could measure the stator and rotor diameters with calipers. I'm glad you're doing a true inertial dyno test in addition to the usual prop testing because it really does give you more objective normalized data. How many averages did you do for each run? The data still looks a little blocky on some graphs and the efficiency one is pretty hard to decipher. Cheers!

[@DoNtRuNFr0mME]

For someone that’s looking to build a new quad I appreciate these reviews.

[@housinit]

RCInpower have been my favorite motors since about a year after I got into quads, so like 5 years or so. Now I can see some data that proves it wasn't just a placebo effect. Thanks Chris!

[@2J.Racing]

Absolutely brilliant content! We are lucky to have a guy like you performing these awesome scientific tests and publishing the results. This will hold manufacturers to their word.

[@Eroc556]

We are I say that every video not to mention a great content maker….. the vids are always smooth and great quality!

[@alexandergrimsmo]

A lot of weights gave their life for this device. Exceptional video by the way!

[@davidcerva9864]

Such an awesome video. You really know you are talking about.

[@DoctorrMetal]

Super informative! And great timing for my new HDZero build :p

[@dkieng]

Great info and thanks for sharing.

[@MindRiderFPV]

Amazing content as usual. I need to try those RC. Next 7” motors?

[@albertatlinguasoft]

Very interesting and extremely useful. Scientific approach. A few more parameters I would like to measure : 1. a motor noise (not sound, but gyro); 2. durability of a motor.

[@madtoffelpremium8324]

Seeing how solid the Emax Eco 2 is, I wound love to see how the other budget option, the Xing-E, performs.

[@KwaddawK]

Would love to see specifically the Xing-E pro 2207 1800kv. They are my go to motor, they look and feel great and come in at the low end of the price range. Lots of people running them now.

[@RyanQuellet]

Very informative. Please test the Five33 1960kV 2207 motor most of us use for 5in racing (it's also a spec motor for freedom spec)

[@sakarrc5001]

Thank you for sharing the knowledge and performing highly scientific tests for us. It would be great if you could test 2807s on the market for all of us that are in love in 7 inch builds. Cheers.

[@AL3XFPV]

Love these tests! 🤓

[@sendorm]

Great video as usual. Thanks. Can you make a tutorial video on flashing AM32, not many videos for all in one esc's.

[@slinkyfpv]

Gold. Solid gold content. Platinum, even.

[@mlentsch]

p.s. this is friggin' gold. Thanks, Chris!!

[@modquad18]

Nice work! Would also be nice to see a vibration analysis and consistency of all params across a 4 motor sample group.

[@jeffbeasley8235]

Great work. You're a huge contributor to the community. Products will continue to get better as independent technical testing happens more and more. One quip -- your audio is out of sync just slightly at times, just enough to bother me. A quick clap to sync audio and video would help!

[@robertgosz4281]

Very valuable. Thanks!

[@aaron6516]

Very cool and interesting... I am glad you explained how the air gap can impact durability. The wasp motor may be perfect for racing, but you may not want to take it Bando bashing. Very cool information!!

[@RCCRAZYSTUPID]

Absolutely great content keep it coming & thanks for doing all this work 🔥💪

[@kandredfpv]

Awesome video as usual Chris. Correct me if I'm wrong but as a budget drone builder my main takeaway is that the Emax ECO 2207 gives a really good balance of responsiveness, torque and efficiency which IMO is decent value for money. It might be worth normalising those scores by cost. 💸

[@ChrisRosser]

That is correct. The ECO II 2207 is a solid budget buy with good performance in every category.

[@chrisbee5481]

Try the tmotor velox v2207.5 motors. Cheap and more premium than emax eco

[@ndcapper]

Great video!!

[@dominickeen6091]

Great video! Would be interesting to see testing on bl heli as well

[@chriscflint]

Hi Chris, great video. I noted that the Mr Steel motor (worst performing) and the best performing both had what appeared to be "single solid stranded" wiring and not what I have seen on some motors which is multiple stranded wiring. And like you I believe the air gap and magnet type can only be the difference in outputs. As an aside I believe the multiple stranded wiring to be better (assuming the same cross section is arrived at) in that it is more flexible so easier to install and it generally less prone to vibration cracking of the insulation. Your comments on this would be appreciated.

[@radfield6089]

would love to see similar testing in the 0802 size, very cool.

[@camelisator]

Well, that confirms my choice of going AM32 and RCinpower gtsv2 last year for all my freestyle build. Amazing work Chris I love how you bring evidences and facts to the table, keep it up.

[@scrimdog3328]

Not 30s in and I can't tell you how excited I am to watch this. Content the people want 🤣

[@jakeman1251]

Absolutely changing the game

[@Simofly]

Amazing instruments to test and very interesting results ! Intrigued by skystars AM32 esc, would be interesting to test with bigger motors 28xx 30xx to see the difference for acc/deceleration tests on 7 inch props

[@Brian-S]

I love the 2107 gtsv3 been flying them for a year now and I just love how responsive they are

[@rossturner9340]

Nice testing, great to see the wide range of motors featured here too! You mention the AM32 firmware has a different performance on the FPVcycle motor vs using other firmwares, it's curious the stout v4 motor sits at the bottom. Given the ethix motors are often seen running with fettec/ kiss at least for Steele, would be interesting to see if that changes any results of the motors here to see if there is a benefit or disadvantage to run specific firmwares with different motors. Correct Spec sheet is very valuable info but I also wonder if there's an optimal setup for each component to be used with, like an f1 car works well together by itself, but take any of the well performing parts alone and put them on your Holden Barina, well maybe the car looks cooler in the parking lot. If the feel of one complete setup works better for a person over another, bring on the Permutation testing 🤣

[@ibnfpv]

This is one if not your best compression and analysis of fpv hardware 👏 I suggest you to add compare to the xnova brand as it is counted as one of the best if not the best motor manufacturer with less promotion and more actual good products Also it would be nice if we can measure the amount of electric noise or vibration for each motor to Better understand which is the most “smooth” Keep up!

[@airdronelongford2027]

Thanks Chris

[@alejandromarquezmejia7088]

good input, thanks 👍

[@duncanpope2899]

great content thank you

[@MarkBakerFPV]

That was a really good detailed experiment. At one point you had me searching the internet for RCinpower motors, unfortunately I fly a lot of bandos so seeing the tight air gap make me worry Obviously the tight air gap increases efficiency, but at a trade off for the durability. Well explained though

[@PowerThumb.]

I'd love to see a test of a AMAXINNO motor!

[@ilkkasorsa9778]

..It buzzes like every other motor I've ever heard... 😄 I believe this civilized but thorough reaming of Mr. Steele's product is purely coincidental.

[@armandrone9016]

Hello Chris, I rewind motors here in Brazil, regarding KV precision, it is very complicated for the kv factor to be a precise value, because the number of turns that is given in each coil is always an integer. What I have noticed is that in the same stator, for example, in a series of four coils 2 are wound with 10 turns and two with 11 turns, of course there are stators with all the coils the same, I just wanted to show you how the manufacturers arrive to different KV values.

[@wade4501]

Excellent work as usual Chris but I'm lost a bit regarding the Kv of these motors. I cannot figure out exactly how you normalized or accounted for the Kv variance if you supplied a fixed voltage throughout your tests. I used to design lightweight BLDC motors a life time ago for a completely different industry (primarily slotless and ironless). I had access to an accurate sub mNm dyno, a high resolution thermal camera, and several other interesting equipment but the Kv got me during testing and comparison every time. I finally settled on efficiency times power density plotted against RPM as a quick and reasonable indication of a particular design's performance. Just about all aspects of a motor's performance (including thermal performance) was neatly squeezed into one simple graph without any dependence on Kv or supplied voltages. I don't know much about FPVs (yet... I'm learning) and I'm not sure if that'd necessarily be a good measure of performance for quadcopter motors... would it? One other small observation if I may. The noise level on these little power houses is horrendous compared to ironless designs. I believe their ear piercing shriek is mostly due to laminations expanding and contracting from rapid flux reversal. Unfortunately, the Ironless designs couldn't compete with the amazing power density of these little guys.

[@WildWildAerials]

Hey Chris. Great work there. Possible for you to also include XNOVA to compare to the test

[@leahcim501]

XNOVA motors are the best and have been forever.

[@jlarson42]

Super interesting and informative video. I'm a big fan of Xing motors, but I'm definitely going to check out RCinPower motors for my next build. I am surprised by the performance numbers of Mr Steele's motors. But they're built to what he wants in a motor and they certainly don't seem to hold him back. I'd love to see tests on motors that racers have listed such as Minchan and Captainvanover. 2207 2100kv 6S motors, that'd be awesome. Happy flying Chris. 🤙😎

[@MrAlekoy]

I think the Stout is built to be, well, stout. I would guess that the larger air gap and steel between the magnets makes it more likely to survive a crash.

[@jlarson42]

@@MrAlekoy that does make sense and fits what Chris says. He certainly makes good use of what performance is available. 🤓

[@cinematiX.flights]

great content. plz more motor test with more manufacturer

[@skyweaver3199]

Rcinpower 4 life. Awesome video man. But your going to make my go-to motors out of stock everywhere. We have been trying to keep it a secret. Shhh

[@coilockerfpv]

I hope one of your next videos is how to flash AM32 to a Blheli_32 board

[@irgtk]

Absolutely correct on the air gap if you want to wring out the most performance from your motor. Of course the trade-off is durability and longevity of the motor.

[@NomadAerial]

What I would really like to see is a vibration by RPM generated. I’ve noticed that some motors are way smoother and easier to tune for than others. Get a motor that causes a vibration close to the root resonant frequency of the frame and it would be terrible. I’d love to see that metric.

[@aphinion]

Wow. Until 27 minutes ago I thought the only thing I need to pay attention when it comes to motors is stator size and KV... and then pick whatever I optically prefer most. Guess it's not that simple after all! The one motor company I am missing though is XNova. It seems practically every racer is flying these and also the five33 motors are rebranded/custom xnovas. I put them on all my newer freestyle quads too and am really happy with their overall performance, but I also noticed they run really hot even with a super quiet quad, so I'd love to see where in that chart they would end up! And I know which motors to throw on my next pink AOS5 now XD

[@hanelyp1]

Also to consider: - permiability of the steel field keeper the magnets are mounted to, and the armature. - eddy current losses in the armature, magnets, and field keeper.

[@cyberbeefpv2810]

Thanks for share!

[@jdnic1]

Motor winding more towards the magnets and more compact winding makes a difference too. That's what I noticed when buying motors. That's why some motor like the stanfpv 2203 have a lot of torque, despite being flat. Taller motors tend to have more compact windings than a flatter motor. Hard to describe it. But if you build a coil a longer coil have less pull than a coil that's short or compact.

[@Atlas_FPV]

I'm glad to see you've revisited this topic and come to different conclusions, I was never satisfied with your original conclusions as they just didnt match reality at all. These results seem to be much closer. But what I would say is that ranking motors from a static test should not be the be all and end all, the weight of your drone, what you want it to fly like and the performance you're after should all be considered. Take the Mr. Steele motor, he flies 600g AUW quads and wants control, so the factors that you rank as worst actually are the best for those parameters, he has less thrust/ power and less response, this makes a quad that has a nicer throttle and easier to fly. Having a super reactive and powerful motor will make for a terrible flying quad unless you fly Sbang style.

[@Alluvian567]

I disagree, as responsiveness, torque, acceleration are not in response to stick input, in a real quad they are in response to the pid cycle. A motor that responds better to the commands of the FC will perform better. After that, if your quad is performing poorly, it is a poorly tuned pid or a poor pilot. Ultimately, except on the bleeding edge of pilots, all this stuff is proably not super noticeable to a pilot. I mean if steele has bad motors (could have just been a poor individual motor for all I know) and can still fly like he does, it is just proof that the pilot is orders of magnitude more important than the components. And I think we all know that. This sort of testing is fun to geek out over and have fun with, but ultimately, the better pilot flying a shit drone will beat you every time.

[@vadimosochenko2528]

Big job, thx

[@TravelwithJean]

Thank you so much Chriss, I really enjoyed your testings and love this scientific approach ! - Do you think you will be able to update us when BL32 firmware will be more performant and consistent ? I have several quads with it, I wouldn't want to switch ESCs specially as I am sure the devs are working on it :) - Those testings could be very useful for cinewhoops motors I think, as we need high performance motors for those builds :) - Something I wondered during your testings is how efficiency, higher torque etc really translate in terms of how the quad feels when flying. For example there are cinematic motors from brands like AxisFlying, does the fact that they are targeted for smooth flying means they have lower torque ? And if they are less performing motors, why are they expensive, and shoold we always take good performing motors and never listen to the marketing approach of "cinematic motors" ? It would be great if you could explain how the results can affect the feeling of the quad. Thank you !

[@micsherwood4930]

that was Excellent!

[@fluoxethine]

We need extreme 8S / 12S motors for 5''. Good that Gaoneng finally made 1300mAh 8S batteries.

[@aviphysics]

If you are testing more motors, I would like to see the Sunny Sky Edge Racing R2207 included. I have been using these motors on planes for a while now, and they seem like really nice smooth motors.

[@DAKARTECH]

Thank you so much

[@olegvorobyev1474]

You're the best!