Hobbywing 3660 4000kv power

[RC MAN]

Hi guys

I have just brought a second HobbyWing MAX10 SCT ESC with the 3660 4000kv motor.
does any one know how much power it will produce on 3s in watts. It doesn't say it anywhere on their website or it's max amps either.
Any help would be appreciated.

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[tntpoof]

4000k on 3 cell is not a wise decision at all to many kv..
it will produce enough power to give you A great smoke how with possible flames... unwise to run a high kv motor on 3 ell.. id say 3200kv max on 3 cells. anyway do what 1 wants I have no idea lol.40 years in this hobby has taught me NOTHING....

 

[Greywolf74]

Hi guys

I have just brought a second HobbyWing MAX10 SCT ESC with the 3660 4000kv motor.
does any one know how much power it will produce on 3s in watts. It doesn't say it anywhere on their website or it's max amps either.
Any help would be appreciated.

​

In order to calculate wattage all you need to do is multiply voltage times amperage. What are you trying to figure out exactly? That motor you bought will run fine on the ESC if thats what you are wondering

 

[tntpoof]

In order to calculate wattage all you need to do is multiply voltage times amperage. What are you trying to figure out exactly? That motor you bought will run fine on the ESC if thats what you are wondering

NOT ON 3 CELLS

 

[Greywolf74]

NOT ON 3 CELLS

with proper gearing it can run 3S. The motor is rated up to 3S and the ESC rated up to 4S. Granted he'll have to run a fairly small pinion but theres no reason it shouldnt work. granted I wouldnt go trying to run it through grass on 3S but dirt, gravel, or street should be fine.

Worst case scenario if I'm wrong and the motor runs to hot he can always drop back to running 2S.

 

[RC MAN]

I Know what the watt rating is but i dont really understand it. Is it a torque thing or is it a Speed thing so would more watts equal more speed?

 

[Greywolf74]

I Know what the watt rating is but i dont really understand it. Is it a torque thing or is it a Speed thing so would more watts equal more speed?

It could but its not a direct measurement of speed or torque, its just there to help you figure out the various electrical aspects of you build. For example if you have a 160A esc and you want to make sure your motor isnt going to pull more than 160A then you could take the Wattage and divide it buy the pack volatge you're running to determine the amp draw. At least unloaded anyway. For example if the motor was 1500W and you're running it on 3S (11.1v) Then you would know by dividing 1500 by 11.1 that the amp draw of that motor will be approx 135A max and you would be theoretically safe to run that.

That being said dont get to caught up on that cuz pretty much any 1/10 scale motor will work with any 1/10 scale ESC providing you dont exceed the max lipo cell count for them. Same goes with 1/8 scale or any other scale for that matter.

 

[RC MAN]

Thanks for the example it helped a lot! I know that that example was just explaining the watts BUT...

In your example doesn't an esc have a peak current rating. So if you were running a motor with a max amps of 150 and you were running a 120 amp esc with a peak current of 830amps you should be alright. Because the motor will only ever draw around 160 amps [depending on your load] at 100% throttle and the esc will be able to handle that for about 20-40 seconds and if you have ever driven a really fast Rc car which motor will draw that many amps you will know that you can't really hold the throttle down for 6 seconds!

 

[progress]

In order to calculate wattage all you need to do is multiply voltage times amperage. What are you trying to figure out exactly? That motor you bought will run fine on the ESC if thats what you are wondering

I thank I was tying to figure out the same thing as this guy because I was trying to work it all out and it says that you need to know the maximum amount of amps your motor draws and the buy an esc 20%higher. Now I have the same set up and had it on a 3S for a while but now I’m read apparently you shouldn’t have a 3S with more than 3200kv which makes no sense to me because I thought higher kv higher battery 3S-4s and so on. You seem as tho u may be able to help. If you can pls let me know. Kind regards

 

[332_RC]

Yes. The ESC should have 20% + more amp rating than the motor. The motor wants to draw amps from the ESC. Higher load, more amps it draws.
A kv rating is the RPM rating. Higher the kv, the less volts it can take. 3200 is good on 3s, will burn out on 4s. 2400 is good for 4s. 1900 for 6s. 1000-1650 for 8s.

 

[RustyUs]

@progress, following the manufacturers recommendations on a motor should be followed, but there are all kinds of things to consider when searching for the sweet spot like @Greywolf74 was explaining in earlier posts.

 

[RustyUs]

I thank I was tying to figure out the same thing as this guy because I was trying to work it all out and it says that you need to know the maximum amount of amps your motor draws and the buy an esc 20%higher. Now I have the same set up and had it on a 3S for a while but now I’m read apparently you shouldn’t have a 3S with more than 3200kv which makes no sense to me because I thought higher kv higher battery 3S-4s and so on. You seem as tho u may be able to help. If you can pls let me know. Kind regards

I personally would not run a 3660 4000kv motor on 3S only because motor limitations would be too easily exceeded. But, with the right gearing, anything is possible. To put RPMs into perspective....

4000kv motor with 2S LiPo = 33,600 RPM
2667kv motor with 3S LiPo = 33,604 RPM
2000kv motor with 4S LiPo = 33,600 RPM

A lower kv motor ran with higher voltage is going to be more efficient.

 

[progress]

This is very informative and helpful thank you. Just so I know I see all of those variants are around the same rpm. Thru the battery ranges so then what would I do if I wanted more rpm or is that the most suggested/allowed etc. it might sound like a stupid question but I'm just trying to figure it all out myself

 

[RustyUs]

This is very informative and helpful thank you. Just so I know I see all of those variants are around the same rpm. Thru the battery ranges so then what would I do if I wanted more rpm or is that the most suggested/allowed etc. it might sound like a stupid question but I'm just trying to figure it all out myself

Follow recommended input for the motor. If motor is 2S~3S LiPo capable, then when using 3S LiPo you're most certainly going to gear down to compensate a little. So many variables when it comes to a motor's happiness. An infrared thermometer is the best tool a person can have in the hobby. Grab one to check motor temps as your search for your sweet spot gearing.

 

[Mike-h]

I have a Hobbywing 3652 4100kv motor that’s fine on 3s running in my FTX vantage (Max10 80a) with no issues.. the Hobbywing website states 2-3s for the motor, just don’t overheat it with too high gearing.

 

[Greywolf74]

Thanks for the example it helped a lot! I know that that example was just explaining the watts BUT...

In your example doesn't an esc have a peak current rating. So if you were running a motor with a max amps of 150 and you were running a 120 amp esc with a peak current of 830amps you should be alright. Because the motor will only ever draw around 160 amps [depending on your load] at 100% throttle and the esc will be able to handle that for about 20-40 seconds and if you have ever driven a really fast Rc car which motor will draw that many amps you will know that you can't really hold the throttle down for 6 seconds!

Sorry RC Man, I never came back and replied to this for whatever reason. ESCs do have a peak current rating but that rating is not for 20-40 seconds. Its more like 3-10 seconds with lower quality ESCs generally being on the shorter end of the scale and higher quality ESCs being on the longer side of that scale. If you have a motor that is consistantly going over the max amp draw the ESC is rated for it will wear that ESC out at an accelerated rate even if you have it geared low enough to not release the magic smoke right away. Its never a good idea to run an ESC/motor that are not properly matched.

I thank I was tying to figure out the same thing as this guy because I was trying to work it all out and it says that you need to know the maximum amount of amps your motor draws and the buy an esc 20%higher. Now I have the same set up and had it on a 3S for a while but now I’m read apparently you shouldn’t have a 3S with more than 3200kv which makes no sense to me because I thought higher kv higher battery 3S-4s and so on. You seem as tho u may be able to help. If you can pls let me know. Kind regards

This is very informative and helpful thank you. Just so I know I see all of those variants are around the same rpm. Thru the battery ranges so then what would I do if I wanted more rpm or is that the most suggested/allowed etc. it might sound like a stupid question but I'm just trying to figure it all out myself

The easiest way to look at it is to just run whatever battery you want as long as it is within the recommended guidlines for that combo and then make sure you gear it so that the motor and ESC do not overheat. The motor should never go above 170F and the ESC shouldnt ever go above 160F. If at any time one of these compnents exceeds this amount then you need to either use a smaller pinion and/or a bigger spur. Keep adjusting the gearing until neither component is overheating. During the gear tuning phase make sure you check temps often. Once you get it dialed in, its still a good idea to check temps after every pack just to make sure you dont have anything funky going on like some type of driveline binding that could cause an excessive load on the electrical components.

If you're running the highest voltage battery that compatible with your combo and you have the gearing tuned as high as you can make it without overheating then you will need a more powerful combo to get any more speed out of the rig. I hope this helps.