Brushless Motor Numbers Explained (KV etc)
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- čas přidán 9. 04. 2014
- Similar to the LIPO overview from a while back here is a short video to cover the basics of brushless motor numbers and stats.
You can see more detail on motor selection on some of my other videos.
Thanks for watching, please comment and subscribe.
Happy flying!
still helping 10 years later, thank you!
Great info. I was so confused until I found this video. Thanks for sharing.
This helped me so much… You are a naturally gifted teacher. I think neodymium magnets in motors, brushless motor technology, Li-po battery technology, all these things that have caused the RC hobby to advance by leaps and bounds in recent years are going to work their way into every day technology in other areas and become game changers beyond the scope of what is now understood. I would see these motors and batteries advertised in hobby magazines and while they appear to be very fast and powerful, I didn’t understand any of the information that was talked about in the ad… This video cleared so much of that up for me, but I’m still just getting started. Now headed towards your video about batteries… Definite new subscriber! Thanks again so much.
Thank you for taking your time to share this info, you have provided me with greater understanding to select a brushless system for an RC car.
The best video on motor sizes and designations that I have found, no doubt. Fantastic job!
Thanks for this! I sort of had an idea and grasp of the designations, but as you and everyone else has probably been aware of, every manufacturer has their own concept of numbering schemes.
Albeit kinda/sorta following a common system, I found from one to the other slight differences that confused me.
Now I can look at them with better clarity!
Thank you: you are giving very clean and clear information: I like it!
Great explainer, thanks a mill for taking the time to simplify all the terminology
Thank god you exist in this world! I haven't been able to wrap my head around all these numbers since I started designing my own hexacopter. I have only been an RTF owner and pilot. I think I'm going to have to see all your videos now!
Welcome to the channel! :D
#*#&>×>28÷
Your videos have helped me out more than any other. Thank you sir!
your always the go to guy when it comes to rc...best teacher ever
Nice explanation of RC motors. Thanks for the clear descriptions.
Very informative and helpful as usual. Thanks.
A huge Thank you for the information!
A grateful beginner from Pennsylvania
This is a GREAT video! I’m just entering the hobby and this is one of the subjects I was curious about. Very good info.
welcome to a great hobby! If you're starting out then a lot of the videos on the 'Introduction to Remote Control' series should come in useful..
Excellent explanation. Thanks for this!!
Thanks Lee, Great stuff! Another excellent video.👍👍👍
Not new to the hobby but new to electrics. Thanks for the explanation of the ID numbers.!
oh my gosh, finally a person who will tell people what those confusing numbers are. thank you
Check out the other videos in the 'Introduction to remote control' series for more videos that explain things in as simple English as I can manage! :)
Thank you very much for the lesson. Very clear!
Thanks so much for this explanation...at last I know what all the pairs of figures in the description mean...they have funny great looking symbols sometimes also, but I now know what the values are (e.g. diameter and length) Many thanks!
Mike H
Thank you. Really useful intro to motors and the numbers
Very helpful videos! Love the informative graphics. Thanks!
Thanks for the clear info. Really understandable
Wow. Excellent job. Nicely explained.
Thank you this video was great! getting ready to build my first quad.
Good luck with the build! Happy flying..
Thanks, I am a newbie and all this kind of stuff helps!
Such a great informational video. Thanks for the effort you put into making this information very clear.
@Painless 360
Your video was very informative and well explained. Thank you for the education.
Very helpful for this beginner. Thank you!
masha Allah nice video bro, something to help with all the guess work up till now :-)
outstanding beginners tips...well done..Thanks
Great info, just getting back into RC models. Not touched anything since I was 14 (20 years ago) so very helpfull
Thanks for the comment, check out the other videos in the 'RC Basics' series.. Best of luck!
@Philip Tomkins
LOL! That's funny, I'm the same way. I'm 20 years older than you but I too, started when I was about 13 or 14. I'll stick with the hobby for a couple years, then shelf it for 10 years or so, then repeat the process. I'm just getting back into it again. Almost all my planes have 70"+ wingspans and all of them are built from kits. Since this is the longest I've been away from the hobby (13 years) and my eyesight has changed (i'm too busy to go get some glasses. Well, that's the excuse I use ) I decided to get an RTF foamy for a refresher course rather than use one that I already have. It's an Easy Trainer by FMS and it's really easy to fly. I wanted to get an RTF because all my "old fashioned" ni-cad transmitter and receiver battery packs are no good. They're all on 72MHz, that's what was used before 2.4GHz came out. I need to add some nitro fuel to my list as well. I've got 3 one gallon cans and even though they're all still factory sealed, I don't think any of it will be any good after 12 years. But maybe it will. I'm thinking out loud...
Anyways, enjoy the hobby, have a great time and stay well, especially during this pandemic!
Thanks very helpful for a newbie like me, Great stuff!
This is excellent! Thank you
Thank you very much for your help.
Best
George
Thanks for the info! Well done!
Good stuff thank you. I took notes!
Long time owner & still unfurl thanks & good luck to any one out there starting off in the hobby today!
thank you so much for teaching us now i can wind my burned motor
awesome tips
Thanks for the very informative video. I was wondering what all of these numbers meant and now I know thanks to you. I am building a quad copter and I do not need to buy motors that I will never need. I need a scout quad that I can use to patrol our property. One of our neighbors likes to dump hazardous waste instead of deposing of it legally. If I can catch him on video I can cook his goose. Thanks again.
+David Wachter best of luck!
Nice tutorial bud. Keep up the good work.
thanks for sharing this pal...very helpfull ))
thanks for this upload!
It's really great....! I never know it....! Thanks a lot.
That is some precious information. Thank you very much indeed, sir.
Brilliant video thank you.
just what I wanted to know thanks for doing this
Great video with NO crappy music!
Thanks man. I thought that the 3 wires supposed to connect to something entirely. But now I know I can just use the positive and negative., and leave the wire that I don't need out
Innovation Hi Innovation, the three wires do all need to be connected. If you have a motor that only has two wires coming out then this is a brushed motor and you will need a brushed speed controller to run it. A brushless ESC with 3 wires will NOT run a brushed motor with two. Hope I've not just taught my grandmother to suck eggs there!!Happy flying!
nice job vweryh well explained
U have great content that's informative 🤘 thanks for sharing and keep up the awesomeness 🚡
Nice explanation!
Excellent video
great job! appreciated
great vid, thank you!
Thank You sir..
It helped me a lot.
Great!!! Explanation!!
very informative video indeed. this is why i like my British cousins
Thank you .this is now on my favorites
One video with complete solution. Thank you bro. Do more videos.
Over 900 videos already on the channel, check them out :)
This video is pretty helpful
great explanations
Yup put this info with the prop video I can calculate the motors needed for my Syma transformation and now I know how to fit motors in the chassis and get the thrust I need to lift. CHEERS!!!
Great details thanks
thank you , very helpful
Thanks learned something in 2020
great video
Superb info
thank you very much 🙏❤️🍺
very well done
helps me understand more thankyou sir
spot on cheers
very helpful thank you
This is exactly what I was looking for, for a very long time, thank you so much, subscribed bell on, liked, please tell us about the esc, done.
All in my RC basics playlist. czcams.com/video/OZNxbxL7cdc/video.html
TANKS A LOT BUDDY
vid may be old but its very helpful :) thank you!
Having got back into RC after all these years (where have I been)?
Things have gotten a little complicated.
You can just buy kits that easily fit for the models your transforming, the only twizz is the mathematics involved.
Too much torque bears heavily on the drive-trains.
Finding the right electronics/motors/esc's that are more efficient that put you on the "fulcrum" of lastibility/high speed economically needs these informative videos to explain.
I have learned a lot from this.
You have to burn-out some equipment to learn the hard way.
You can avoid a lot of the guesswork if you know a few things about the model. Check out the motor and prop playlist for the tips and tricks... happy flying!
Ok.Thank you very much.
Hello, thanks for useful informations. I have a question. Is 1:1 thrust:weight ratio enough for safe flight? I mean for fixed wing aircraft cruise flight. From my aspect, here is the thing firsty, you need to analyse drag of aircraft then you should find stall speed after that your thrust at stall speed must overcome drag. Is this way neccessary?
Depends on the model type and scale. See my video on it.. Best of luck
so good
i wonder if there is an algorithm for the perfect motor, maybe it would have to involve the total weight of the multi rotor divided by 4, and then it would be the highest ratio of torque to that weight
Is iT possible to use This on a fan so iT Will work true a plug and socket?
Great video, its the only good explanation of electric motors iv found. My issue is, how do you size up electric motors for older glow models that dont come with recommended motor sizes ect. Is their a compare chart which would give you a glow to electric equivalent? cheers
First let me state that I am far from expert on this, but I am putting my 2pennyworth in as my advice is probably more helpful than none at all. What I do know is that replacing glow with electric is a 'rule of thumb' endeavour. You cannot just replace a given glow size with a given electric motor, things are a litlle more complicated than that.
First you need to look at the power of the recommended glow engine. These are usually given in horsepower, but you will find electric power is specified in Watts. No worry, hp and watts are the same thing just using a different scale (like Celsius & Fahrenheit). There are 746W to 1hp, so just multiply the hp rating by 746 to get the wattage.
Generally it takes a basic '35' 2-stroke glow to get 1hp, while higher tuned versions will give more but this is a good general baseline for engine size/ power rating. So divide the recommended engine size by 35 to get the hp for the model. Then multiply it by 746 (as given above) to get watts.
Now you are in the area where Painless360's videos can start to help. Start looking at the model type, prop size etc while following his advice and you should get there okay. Remember that most glow engines operated in a practical range of about 15,000rpm (while smaller engines rev higher & larger ones lower).
A point also worth remembering is that the power delivery of a glow is very different from that of an electric motor. They have very little torque at low rpm, all their power comes in at high revs, while an electric motor is much more linear. I would deal with this by upping the power required a little bit, solely on the basis that you can always throttle back an overpowered model, while the only solution to an underpowered model is to replace the motor.
Of necessity this is very vague but I'm sure that following these rules will get you flying. And I'm certain you will very quickly develop the necessary feel where you can just look at a glow model and say 'that will need an xxx electric power plant'.
Or you can just do as I do. Chuck high powered motor in big models, little motors in little models & medium motors in medium models. With revvy motors (& small diameter, high pitch props) in fast models, and torquey motors (with big props) in donkey models.
Good Info
I'm looking to build my first quad but am a little confused with something. When it comes to picking a motor/ESC combination, I've seen where it's recommended that the ESC handle 10-15% more amps than the max draw of the motors. I see everyone in the 250 class using 12A ESCs but the battery draw to the same class motors are from 11-14A. Am I missing something? Thanks.
Robert Hathaway I wouldn't risk it that way - there are tolerances in the ratings of the electronics that are in your favour but I wouldn't trust my model to that! I'd always make sure my ESC can supply slight more than the max current from the motor and make sure that the LIPO can comfortably supply a little more than the maximum rating of the ESC. Happy flying!
Man, you truly are the oracle! Do you do professional consulting?
I used to in my professional life.. Happy flying!
I am having trouble finding the current consumption of brushless motors, most of the online store have no data sheet for that particular motor. Do I simply divide the power by voltage? or is there some calculation i need to do? Thank you!
+Ta Ko you need the datasheet. I'd send the vendor a message and ask them for it., best of luck!
Thank you
brushless I can understand right up until timing adjustment. wish motor manufacturers would give more documentation on what should be set up based on ESCs and voltage and load/prop.
I know its a bit late but will you do one on electric longboard motors? There seems to be some confusion about VESC or premade ESC from ebay and their ratings in the DIY community.
That's not something I've got a lot of experience with. I have a seen a few electrics kits that seem to remove a lot of the guesswork.. Sorry I can't be of more help on this one..
Hi sir, is it ok to use motors/ESCs of different brands with similar ratings, or it's ok to use a different brand and a different rating altogether?
I wouldn't. Using ESCs of the same make and model, but different revisions, can cause problems.. Best of luck!
great
hello painless lots of useful info but i got a question.i have a motor whos label just says 1300kv.and no more info.
can you explain pls.how one can determine motors wattage or the amps.thanks.
mohammad abid You need to go back to the supplier and ask. You can connect it to an ESC and then connect the ESC to the battery using a amp/wattmeter. Places like HobbyKing sell them. Power the motor with the prop (make sure its securely fastened to something) and take a reading of the Watts on the meter.
Best of luck with it.
Hey there! Just a Quick question: which ESC and which battery i need for 1000KV or 1400KV version of this?
+Berkay CoreSec see our videos on sizing components in our Quadcopter building for beginners series. We cover how to check it out. Best of luck!
Hi.
I have some questions related to motors.
I hope you will answer to me.
I notice that motors for planes have normally higher can rotor than the motors for drones.
Why this difference?
Comparing motors for planes and for drones with same diameter, same kv and same voltage applied, what are the differences between motors?
Considering same motors characteristics, may I use a drone motors on a plane?
There is any differences in performance?
About propeller, which are the main differences between drones props and planes props?
Is it ok to use drones props on planes?
Thanks for your attention and replay.
Regards. Giorgio.
That's a lot of questions here are the short answers ;)
1) 5" quad motors are all about speed and performance, planes have more room and don't need to squeeze that much power out of a small space
2) Most of it is branding and hype, sure there are motors with better bearings, magnets and quality control on both sides of the fence.
3) Yes you can, I've used multirotor motors on lots of wings
4) Not by much at all if the specs are the same
5) Drone props are all about speed, plane props tend to be more of a range of performance and efficiency.
6) Yep
Happy flying!
i'm trying to make quadcopter for a school project.i'm at a loss as to what motor+prop to choose.my quadcopter needs to be quite fast(but doesn't need to perform tricky manoeuvers),but is heavy(has camera and other accessories).could you please help me?should i choose a low kv + high diameter prop?
+Houidi mohamed amin see our video on choosing motor and props in the 'Introduction to Radio Control' series.. you need to know how heavy the model will be first.. best of luck!
So for a heavier quad would you recommend a higher KV or a lower KV?
For longer flight times - lower KV and larger props. See our other videos on power. Best of luck!
I love your videos mate. Solid knowledge delivery. Just went through your entire Taranis X9D plus playlist and I dont even own one (it's in the mail). So anyways I wanted some advice, I am scratchbuilding a F14 150% tomcat from parkjets.com and it's pretty huge. I'm expecting it to be 4-6kgs after it's fully setup but I have no idea as to what motor to use. The manual tells me to use a 2015-4100 but that'll be too small for this 150 size model. What do you think? Also I have only one motor mount.
+Brenden Anthony Das It depends on how you want to fly it. There is a rule of thumb that you need 1.5x the weight in thrust for sport and if you want insane performance look at 2x plus! Best of luck..
+Painless360 I think I prematurely commented without going through your entire video, which explains my exact question. Thanks anyway! 2 times the thrust is going to cost me loads :(
Which brands do you use most for airplane motors? I was looking into aliexpress and they have some terrifically low prices on rc stuff, the catch being that some of their stuff is unbranded.
I'm a cheapskate ;) I tend to use the same motors as the quads and that keeps the spares down. I fly mostly soarers and wings that weigh very little so don't need lots of power.
Let me know how you get on..
I use unbranded, Turnigy as well as others. I try and get motors with decent reviews.. Best of luck!