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!
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.
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!
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.
@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 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
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!
Thank you. I visit this video every couple years :) Can't they just say "this motor drives this PROPELLER at this RPM", voila. Wouldn't that be so hard ?
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!
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!!!
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?
Good Morning Lee I have a few questions about an electric set-up 1) The kV figure, is it off-load with no prop fitted. 2) Or is it on-load, with the correct prop and drawing the quoted current ? 3) In my test the current was only 34 A, ie, much less than the quoted figure. ESC, Turnigy Plush 100A. Battery, Turnigy Nano-Tech 4000 mAh. Watt meter, Hobbyking P1 HV. EMax Grand Turbo GT 2826 / 06 2899ba07-aea5-47c3-acba-bee7f787927e.png The motor is quoted at 4S 710kV 14 x 7 Prop 7600 rpm 51 A But at 4S 7600 / 14.8 = 513 kV ! These figures (513 and 503) are similar When I tested the motor 4S (13.7V on load) 14 x 7 Prop 6900 rpm 34 A 473 W 6900 / 13.7 = 503 kV ( 13.7 x 710 = 9727 rpm ? ) I also checked the AC voltage 8.7 V AC ph to ph 770Hz ( 6900 / 8.7 = 793 kV ) The battery voltage after testing is 15.1 V My questions are, what voltage does the kV figure relate to, and why is the on-load current so low ? Thank you for your attention Regards John McClean, in Wicklow
A motor will try and maintain that speed in all conditions. The wattage it'll pull depends on the load. Larger props and more pitch will need more power... Best of luck
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..
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.
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.
Hello, very informative video (as always). Unfortunately not all manufactures will supply adequate information for their motors with most of them providing only the rather not so useful Kv. How can one determine the number of poles in a brushless motor? Thanks and regards George
Thanks for your prompt response. The problem of course rises when the specs don't include pole count and looking at the motor the winding pattern is not obvious. For instance a motor with 9 coils how many poles does it have?
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.
See my video on choosing motors for multirotors.. All of my videos are carefully organised into playlists and every video has a number of text tags on them to make them easy to find if you use a search. This video should help and explains a few tips for finding the video or playlist you're looking for - ua-cam.com/video/CIuUNdVfBJQ/v-deo.html. Happy flying!
still helping 10 years later, thank you!
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÷
The best video on motor sizes and designations that I have found, no doubt. Fantastic job!
your always the go to guy when it comes to rc...best teacher ever
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.
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 for taking your time to share this info, you have provided me with greater understanding to select a brushless system for an RC car.
Not new to the hobby but new to electrics. Thanks for the explanation of the ID numbers.!
A huge Thank you for the information!
A grateful beginner from Pennsylvania
Nice explanation of RC motors. Thanks for the clear descriptions.
Your videos have helped me out more than any other. Thank you sir!
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!
Such a great informational video. Thanks for the effort you put into making this information very clear.
Love your videos you make them easy to understand and get your head around certain subjects. 😊
Very informative and helpful as usual. Thanks.
Thanks Lee, Great stuff! Another excellent video.👍👍👍
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!
Great explainer, thanks a mill for taking the time to simplify all the terminology
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!
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..
Thank you. Really useful intro to motors and the numbers
Thanks for the clear info. Really understandable
Very helpful videos! Love the informative graphics. Thanks!
Good stuff thank you. I took notes!
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
outstanding beginners tips...well done..Thanks
Long time owner & still unfurl thanks & good luck to any one out there starting off in the hobby today!
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!
Wow. Excellent job. Nicely explained.
Thank you very much for the lesson. Very clear!
thank you so much for teaching us now i can wind my burned motor
Great video with NO crappy music!
Very helpful for this beginner. Thank you!
Thanks very helpful for a newbie like me, Great stuff!
@Painless 360
Your video was very informative and well explained. Thank you for the education.
just what I wanted to know thanks for doing this
Thank you. I visit this video every couple years :) Can't they just say "this motor drives this PROPELLER at this RPM", voila. Wouldn't that be so hard ?
masha Allah nice video bro, something to help with all the guess work up till now :-)
Thank you this video was great! getting ready to build my first quad.
Good luck with the build! Happy flying..
Excellent explanation. Thanks for this!!
Thank you very much for your help.
Best
George
Thanks, I am a newbie and all this kind of stuff helps!
Thank You sir..
It helped me a lot.
Brilliant video thank you.
Excellent video
One video with complete solution. Thank you bro. Do more videos.
Over 900 videos already on the channel, check them out :)
Nice tutorial bud. Keep up the good work.
nice job vweryh well explained
This is excellent! Thank you
awesome tips
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!
Great!!! Explanation!!
Thanks for the info! Well done!
thank you , very helpful
vid may be old but its very helpful :) thank you!
Nice explanation!
It's really great....! I never know it....! Thanks a lot.
Thanks learned something in 2020
This video is pretty helpful
thank you very much 🙏❤️🍺
great explanations
very informative video indeed. this is why i like my British cousins
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!!!
very helpful thank you
Ok.Thank you very much.
great job! appreciated
thanks for sharing this pal...very helpfull ))
Man, you truly are the oracle! Do you do professional consulting?
I used to in my professional life.. Happy flying!
Superb info
That is some precious information. Thank you very much indeed, sir.
U have great content that's informative 🤘 thanks for sharing and keep up the awesomeness 🚡
great video
you can look at the channel to watch the brushless motor video.
nice video
nice video
Nice vid bro
nice video
very well done
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
Great details thanks
great explanation
Can this be used in a rc car for faster speeds?
What of the 12 mean in 2822/12
The number of times the wires in the motor are wound round the poles.. See video. Happy flying!
Painless360 oh so like the number of turns? Thank yiu
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. ua-cam.com/video/OZNxbxL7cdc/v-deo.html
thanks for this upload!
Good Morning Lee
I have a few questions about an electric set-up
1) The kV figure, is it off-load with no prop fitted.
2) Or is it on-load, with the correct prop and drawing the quoted current ?
3) In my test the current was only 34 A, ie, much less than the quoted figure.
ESC, Turnigy Plush 100A. Battery, Turnigy Nano-Tech 4000 mAh. Watt meter, Hobbyking P1 HV.
EMax Grand Turbo GT 2826 / 06
2899ba07-aea5-47c3-acba-bee7f787927e.png
The motor is quoted at
4S 710kV 14 x 7 Prop 7600 rpm 51 A But at 4S 7600 / 14.8 = 513 kV !
These figures (513 and 503) are similar
When I tested the motor
4S (13.7V on load) 14 x 7 Prop 6900 rpm 34 A 473 W 6900 / 13.7 = 503 kV
( 13.7 x 710 = 9727 rpm ? )
I also checked the AC voltage 8.7 V AC ph to ph 770Hz
( 6900 / 8.7 = 793 kV )
The battery voltage after testing is 15.1 V
My questions are, what voltage does the kV figure relate to, and why is the on-load current so low ?
Thank you for your attention
Regards
John McClean, in Wicklow
A motor will try and maintain that speed in all conditions. The wattage it'll pull depends on the load. Larger props and more pitch will need more power... Best of luck
Where
you buy that red propeller
When considering the weight vs thrust is the fly weight with all components of the plane including the motor and battery?
It is the flying weight, so it is with everything attached...
TANKS A LOT BUDDY
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..
Hello, are you able to help me on how brushless motors should work when implemented on sslot cars?
Sxectly the same. But, the ESCs in a car can run forwards and backwards... Best of luck
great vid, thank you!
Thank you .this is now on my favorites
So, would the black wire be for negative, red for positive, and yellow for??
If you're talking about the three wires from the ESC to the motor then they are neither. See my video on ESCs and motors..
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.
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.
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!
Hello, very informative video (as always). Unfortunately not all manufactures will supply adequate information for their motors with most of them providing only the rather not so useful Kv. How can one determine the number of poles in a brushless motor?
Thanks and regards
George
+George Venetsanos Usually from the specs or by looking at the motor - best of luck!
Thanks for your prompt response. The problem of course rises when the specs don't include pole count and looking at the motor the winding pattern is not obvious. For instance a motor with 9 coils how many poles does it have?
Why is it that you are interested in knowing the pole count? Most pilots and builders don't need to know..
spot on cheers
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.
Thank you
What if you find a motor that only says 2218B 1180kV how do we know how much turns it has
The turns don't matter that much if you know the other specs of the motor. See about choosing a motor in the other video in the series.. Best of luck!
Painless360 what specs do I need to know if it will have enough thrust to move my plane?
See my video on choosing motors for multirotors.. All of my videos are carefully organised into playlists and every video has a number of text tags on them to make them easy to find if you use a search. This video should help and explains a few tips for finding the video or playlist you're looking for - ua-cam.com/video/CIuUNdVfBJQ/v-deo.html. Happy flying!
Painless360 thank you so much