Did I find a bug in BL_Heli32? Inertial dyno testing KM55A AM32 ESC.

[@Packaringos]

I shed one tear for each of our fallen ESC brothers and sisters. Their sacrifices will not be forgotten.

[@JamesManimal]

F

[@adrasx6999]

All of them having a name makes it even more sad

[@zefixx6659]

Hi Chris, maybe you can try an older Version of BL_Heli32 to check if this problem is already there. Top Content!

[@josefdahari]

I was sent one of these am32 a while ago and haven't had a chance to really use it. This video has really opened my eyes regarding am32. Going to pop it in a kiss build and see how she does. Thanks brother

[@skyweaver3199]

Let us know

[@adrasx6999]

No clickbait title, no clickbait thumbnail. Man it's so easy to give you an upvote. Keep up the good work

[@donphobos]

Very nice piece of equipment! I would raise a word of caution. Please consider a strong (polcarbonate or similar) protection shroud around the inertia wheel. If it for some reason disintegrates or falls off the axle (you never know) at those huge speeds (30k RPM) it can do some nasty damage. Just to be on safe side.

[@ChrisRosser]

Great point!

[@christianmarkussen6412]

Great work👍. I love how methodical you are in your studies.

[@ChrisRosser]

Thank you! I appreciate the support 😁

[@pablo98798]

soo cool to see new videos on dyno testing for fpv quad motors, there are some old videos about this but having data for today's motors and props is even better

[@kelvinwolf225]

I have been wanting to see an fpv dyno for forever!!! Great work Chris, always appreciated

[@ChrisRosser]

Thanks. Whenever you build a new test rig you end up finding out new stuff! 👍

[@shaneintegra]

Thank you so much for everything you do, people like you testing these things is what makes this hobby so much better!

[@MCsCreations]

Pretty curious indeed, Chris... Weird! Fantastic testing! Thanks!!! Stay safe there with your family! 🖖😊

[@ChrisRosser]

Thanks, you too!

[@CesiumSalami]

FWIW, I don't know how long I've been using AM32 - I flashed an older BL32 ESC over to well before BL32 supported I think even throttle based variable pwm, so it's a little hard to say where the performance benefits have been. But it has been simply stellar and reliable even for me running on unsupported firmware.

[@sakarrc5001]

Worthy sacrifice for valuable data. Thank you brother for enduring the torture in killing your own ESCs. Great Info!

[@ChrisRosser]

Hopefully now that I have found the settings the risk of smoking anything is very low going forward!

[@charlesmarseille123]

great cam angle and setup in your lab now, feels just right and not purple and yellow like all youtubers. thanks :) I never received the apex frame for coulomb damping testing.. i guess aliexpress shipping got lost. I just bought an apexhd so I'll test it soon. Keep up your good work!

[@ChrisRosser]

Yeah I got a fancy new camera and stand thanks to my kind Patrons!

[@razzeeee]

Would be interesting to see this versus bluejay.

[@butterflyfpv]

Great work! That should also exist in the tiny whoop motor area! Personally, I'd happily pay to make that happen.

[@Gabriel-qh5yv]

I really appreciate... you r putting to much work in this hobby to make us understand the good and the bad 😉

[@MurdersFPV]

Damn it, Chris. No one makes me buy more stuff than you. 😣

[@wearemany73]

I was never a fan of the "up the nose" view of your camera while making these videos. This camera pov is much better. Also, great video 👍😊edit: RIP Lisa and Theresa 😞

[@ChrisRosser]

Cool, thanks!

[@jfect2]

The duel board thing.... Thinking we will see more of this in this industry.

[@artemsloytsev1052]

I would just pretend that i didn't see any cine25 frame hanging on that wall. #excited

[@marlin-fpv]

Good finding! That must be why am32 just feel way smoother.

[@starsstripesjacket]

Awsome testing! Id love to see a fettec esc on the stand if you can :)

[@ChrisRosser]

Thanks for the idea!

[@lemonsquareFPV]

This would be very interesting, with the high PWM implementations and such.

[@rabbitambulance]

Theresa, Boris, Liz? 🤔 Mr. Rosser is getting political, and I, for one, LOVE IT! 🔥🔥🔥

[@timothyciarlette8250]

Thank you Chris.

[@sketchpv3080]

Car people know that it’s all about the “area under the curve” when reading dynos. And AM32 seems to win pretty big vs BLHeli_32 in this regard. Plus I imagine it’s a much smoother delivery of power which means happier gyros with less filtering.

[@ChrisRosser]

AM32 definitely provides a benchmark for how the curve should look. Nice and smooth, no big spike (which could burn something) but lots of torque through the whole rev range. Let's see how other FW compares 😁

[@DrMacca]

Absolutely phenominal thumbnail!!! LMAO 🤣🤣🤣👍👍

[@josephslade8163]

Although we respect the fallen ESCs we must also hope they remain firmly in the category of dead ESCs and Chris does not attempt to resurrect them. As that could be dangerous - for the whole country.

[@justhackitfpv]

AM_32 is the new ELRS

[@ChrisRosser]

I mean it looks really good performance wise but time will tell!

[@ninjalemon_Squash]

gogogogo

[@Positive_Altitude]

4:15 cables get affected by Ampere's force, there is some current flowing 🙂 very cool

[@Atlas_FPV]

Interesting test stand, are you planning to test different motors using this method? I wonder if this test will finally highlight the differences between 2207 and 2306 although I suspect not since its a power test, could be interesting non the less.

[@О.Ш-ь1щ]

i bet that bug won't appear on a smaller load. blheli waits for too long to speed up this huge wheel so it drops the current on the motor for a bit to check if motor spins without current and adds another spike of current to get to the required rpm

[@О.Ш-ь1щ]

@UCzCG6HrsjDLqJs83a2OO6dQ also I do believe that am32 will have worse performance in 5inch drones sphere because of slower reaction to the signals of changing rpm and will burn all the wires on the motor in a crash or in turtle mode. If you never noticed when the motor is blocked blheli doesn't try to spin it with constant torque, it does it with impulses in such a way: here is your current bro. after a couple milliseconds blheli asks: "are ok bro, do you spin freely?" and doing it over and over again. I do believe that it's a much smarter way than am32: here is your current, pussy! wtf, go fcking spin, here is all the current we have and a slap for your ass.

[@ChrisRosser]

I don't know, a smaller load will accelerate faster but the torque vs RPM curve is meant to be independent of the load or how fast the motor accelerates.

[@О.Ш-ь1щ]

@@ChrisRosser I do understand, but there is a special propose of the motors and the escs for a small load and high response and you test all this system in absolutely enormous load for such a setup and compares with system for another propose

[@ChrisRosser]

@@О.Ш-ь1щ I do agree that this is a challenging test for the motor and ESC. But the AM32 ESC proves that it is possible to deliver a smooth torque/RPM curve under these conditions. There is no reason to suspect that the torque variability will improve under reduced load, quite the opposite! If the ESC is struggling to apply power smoothly when RPM increases relatively slowly I would expect things to get worse if RPM increases rapidly.

How about running the same test with a Blheli S it seems relevant.

[@ChrisRosser]

Will do!

[@shadai7398]

Came here for this comment. Need to know if BlHeli_S has the same problem as BlHeli32

Could even be the reason for mid throttle oscillations

[@alkamotors158]

Not sure if it's low rpm throttle protection related but Am32 low rpm protections are let off gradually and proportional to the kV of the motor. That's why KV is entered into the config tool.

[@ChrisRosser]

Whatever you're doing it is producing a really lovely looking torque/power curve 😁 Not having those big spikes and dips should really reduce the likelihood of smoking motors/ESCs under heavy loads. 👍👍

[@baggszilla]

Maybe it has to do with the inertia of the weighted wheel and the rpm telemetry giving specific torque when needed!

[@Asu01]

Great video! Have you played around the acceleration related parameters (ramp-up power, startup power) to see the effect on both system? They aren't set the same and don't have the same scale on both system so you may have to tweak those around.

[@ChrisRosser]

I will be doing that but under the guidance of the BL32 devs as we work on the issue. Once it's fixed a big ESC shootout is due I think.

[@CollectingRetro]

@@ChrisRosser Sweet! I'm excited for that, I think some fets perform better than others.

[@staticmotion1628]

could i try the AM 32 on my foxeer 65amp f4 or will i brick it trying to flash? thank you and great information just found your channel so much good information

[@PIDtoolbox]

Wow! Nice finding. Are the curves time locked? It looks like blheli always ramps up faster too. Is this real?

[@ChrisRosser]

No curves are not time based. The X-axis is RPM so BL_heli is starting from a lower RPM.

[@BerTeL_FPV]

Good work!!! maybe some kind of current limiting?

[@ChrisRosser]

Perhaps, but AM32 does active current limiting too I think?

[@marsma18]

I do not think that any ESC doing any of the real current limiting as they do not know what current are drawn on ESC. There are not many ESC that have current sensor on each ESC (FETTEC and KISS and couple of BLHeli_32 like airbot)

[@rctom1]

Thank you Mr. Rosser for your deepdive to improve performance and safety. I´ve a bunch of dead esc´s too. One of my 7incher with 50amp. bl-heli s is rebooting in midflight , once i´ve seen 0 volts on my dji custom osd , so i´m not confident to fly it now. Can it be that the fettec spikeabsorber or the capacitor is faulty? I´ve flashed it with bluejay and it worked perfect more than 10 flights until this strange rebooting started.

[@cinemoriahFPV]

Spike absorber does nothing remove it.

[@rctom1]

@@cinemoriahFPV , Thank´s i will try.

[@rctom1]

@@cinemoriahFPV Hey I found a cold solder at the - pole of the esc, removed the sa too. yesterday one test flight with 4s2pMolicell pac 20 min. with no issue.

[@chriswhitehead6095]

How does BLheli_s compare Chris?

[@mengleelim1054]

Hi Chris, would you mind sharing the am32 settings for a 5" freestyle quad.

[@thinkaboutwhy]

thank you

[@Simofly]

Do you think this issue can be connected to an unstable capacity of prop spin breaking? I’m just searching for an issue I have with 7” heavy builds when diving near completely upside down , where my motors seems to be incapable of stopping even at zero throttle

[@PhysicsOperator]

This is awesome

[@rckyfpv]

Hi! Could I get some advice about what motors should I use for a 3" freestye build (about 210grams with action camera)? My options are: 1804 3500KV, 1507 3800KV, 1404 4000KV motors. I am looking for freestyle-ability, and flight time. If you were me, what would you choose? I have 450mah 4s lipos, but I plan on buying some 650mah ones.

[@ChrisRosser]

1404 is plenty big enough for 3" freestyle

[@rckyfpv]

Thanks!

[@rckyfpv]

Thanks! And do you think 3000kv is enough?

[@aphinion]

What is this smaller whoop on your board? XD I'm... very curious. :D

[@ChrisRosser]

Cine25 proto 😁

[@aphinion]

@@ChrisRosser Now I'm getting really really curious :D Been looking for a reliable sub 250g whoop and my Pavo just... sucks. So I may wanna check this out asap ;3

[@jonnyt9895]

I have a problem: the motors when idling vibrate and make a rough sound that fades as speed increases (both with and without propellers mounted). I bought mini F722 HD Pro AM32 ESC Stack 2022 version and I'm using it with 2806.5 1300kv I'm using Betaflight 4.4 and checked that all 4 motors spin in the correct direction (if I use Betaflight for spin the motors they suond smooth) Can someone help me please?

[@chrisbee5481]

You promised 3.5 inch props tests😢

[@nomadaFpv]

How about blheli-s? Is three any possibile to test ESC with blheli-s in this test setup?

[@Brian-S]

Did you state what firmware version you were using for the blheli32? I'm assuming it's the newest version?

[@ChrisRosser]

Latest at time of recording 32.9

[@JJBitter]

Using bluejay would make anything different?

[@ChrisRosser]

I plan to test BL_S and Bluejay soon so stay tuned!

[@Simofly]

+1 for bluejay and blheli_s tests !

[@CollectingRetro]

Interesting finding! I wonder if the bug exists on all BLHeli32 versions? I've noticed different performance between versions and even 32.9 burning motors on certain ESCs, but not others.

[@ChrisRosser]

It's difficult to know. Once we identify the cause we should be able to make a list of all affected versions

[@badfourlife]

I would see if that bugs there on 32.7.... I was getting weird mid throttle bobbles on 32.83+ on most of my builds that went away on 32.7

[@lookman04]

Is this bug on Blheli_S too? I mean is it inherited or introduced by blheli32?

[@DigitalCruzer]

Very interesting

[@steffenfpv5579]

Will you Test fetten esc with the new method?

[@ChrisRosser]

Yes, I'll test BL32, AM32 BL_S and Fettec for a future video.

[@aowi7280]

I haven't seen any updates from blheli.

[@TheMadmacs]

i tried the tekko 32 a while ago, felt very sluggish, have avoided 32bit ever since

[@bennie1198]

Has BLheli changed anything in the last 5 months?

[@ghiyatshisyam]

Hello sir excuse me, iam from indonesia 🇮🇩 i need your help for creating fpv frame, i made 5 frame they are good on roll and yaw but the problem always only on pitch can you help me for this part its makes me so confused 😐 can you help me to solve this problem sir? Thank you 😊

[@Victor90NOR]

is BlHeli better now?

[@tuhotomi]

🔥

[@728239]

Do BlueJay has the same issue?

[@VIREGAnet]

0:44 is that autofocus?

[@ChrisRosser]

Yep, I'm running a wide aperture F2.8 so I can run a nice low ISO. We get some nice bokeh when I hold up the ESC to the camera!

[@VIREGAnet]

​@@ChrisRosser sheesh... that's very nice tho

[@dutchfpv7010]

Good info that everyone using Bluejay already knew. BLHeli32 is an ESC killer. Get off of it as soon as possible.

[@loryriga]

Nice to know we're paying more for 32bit MCUs so we can run a heavily bugged firmware 😑

[@dutchfpv7010]

Yeah you like that. Because that's exactly what is happening. I switched to Bluejay after killing like $1000 worth of 'premium' BL32 ESCs last year. Raced all year on $37 mamba ESCs with Bluejay and they're all fine. BLHeli32 is trash

[@loryriga]

@@dutchfpv7010 I'm gonna switch too, sadly I just spent 90 bucks foa a foxeer reaper...🤦‍♂️

[@dutchfpv7010]

@@loryriga its possible to load AM32 on them. You just need the programming dongle or someone who has one.

[@Loz348]

so its a rollng road 😂

[@ChrisRosser]

Absolutely. Can't believe no one's used this technology to investigate FPV ESCs and motors before now!

[@richardheedfpv9626]

The more I learn the less I know. 😂

[@ChrisRosser]

I'm not sure I know what's going on either!

[@richardheedfpv9626]

@@ChrisRosser 😂😂

[@fpvgiggles]

I've killed 2 3 of those 30x30 55amp.escs...they suck for me :-(

[@ChrisRosser]

Mine has been pretty robust so far but it'll be good to get to the bottom of this torque variability.

[@ClareFPV]

First

[@ChrisRosser]

Correct!

[@pietlopsa9164]

Gimme that AM32! 🫱🏻‍🫲🏼

[@ChrisRosser]

Yes. Open source and looking good.