AX 2210N Motor benchmark

This week I tested my motors with several types of batteries and props. To see which combination runs the most efficient.

So what components are fix
 - motor: HK AX-2210N 1000Kv Brushless 
 - ESC: HK 12A BlueSeries Brushless Speed Controller

And what is tested
 - Battery: 2 cell lipo and 3 cell lipo
 - Prop: HK Slowfly 9x5, EPP 10x45, GWS HD 10x6

Test Result

For my setup (motor+prop) there is no large difference between these 3 props on a 3 Cell battery. Note that I did not test above 125 watt because it's not save to run this motor over a longer period of time above this value. The 9x5 prop runs the most efficient and the motor is running cool.
Both 10 inch props are oversized when using a 3 cell battery. The motor runs warm even when not on full power and they are less efficient ~2%.

When efficiency is prio 1 then you have to use a 2 cell lipo with this setup. This increases efficiency by ~12 %. But it decreases the maximum thrust so you need to be carefull and do a good calculation on desired thrust and the weight of your multirotor. The efficiency between the different props on this 2cell setup is only ~2%. The maximum thrust for a 9 inch prop or a 10 inch prop on this 2 cell setup is 15%.

Yaw authority

My new frame came with a new problem. Yaw control is almost zero. My previous quad + frame had good yaw authority this because of the larger prop and the longer distance between the motors. With my new quad x frame I decreased prop size and distance between the motors. This gives me almost no yaw control at all.

But the solution is simple. Just tilt the motors in a angle of 3 to 10 degress. With my homebuild motor mounts this can be achieved very easely. Just add some washers on one side of the motor mount. See the image.

This simple solution gave my new frame a real yaw authority boost. Now it's more stable then my quad + frame on al axis (yaw, roll, pitch) even altitude hold is much better. So if you notice pour instability and bad yaw authority. My advice: tilt your motors!

And here is the video of my first flight with my new quad frame and tilted motors.

vibration reducing motor mount

Here it is. My homemade motor mount. It's easy to build, it's cheap and it has a good result on reducing motor vibrations. The only disatvantage is that motor temperature is a bit higher. If you mount the motors directly on to the aly frame the heat will flow in to the frame causing the motor to be cooler. In this case the motor mount blocks this temperature flow so to motors run warmer.

1) Take some material that you think will be strong enough to hold your motors and make some little plates (in pair). Size: a bit larger then your motor :)

2) 1 one plate you drill the holes you need to mount the motor and rubbers. On the other plate you drill the holes you need to mount this plate to you quadcopter frame and rubbers. In my case I use 6 rubber to hold 1 motor.

3) When pushing the rubbers in to the holes and attach the 2 plates. You will see that there will be no contact from motor to frame. It's that simple. If you have a smaller multicopter with less thrust you can use 4 rubbers. If you have a lager multicopter with more thrust just add some rubbers.



The rubbers I used for this motor mount are in fact computer case fan mounting rubbers. They are really cheap as you can see -> Case Fan Rubbers
I noticed that there exist professionel RC motor mount rubbers. But these are more expensive and hard to get. Maybe they give an even result. But as I said, my setup is really easy to build and it's very cheap.

The Motors that I'll use for my quadrocopter are the HobbyKing AX-2210N 1000kv.
(hobbyking productpage)

As I see, most quadrocopters use low kv motors. They just have to create a good static trust. Because these motors have a low kv they consume less power the high kv motors. Note that a large propellor should be used to get enough thrust.

These motors will be equiped with a 10 inch GWS 1060 prop. My quadrocopter will be around 1.1kg. I hope this will work :)


A good review/test of these motors with several props and voltages can be found on this link. peakeff.com AX-2210N benchmark As you can see on this page. At max power I should get a total thrust of 3kg. The total weigth of a quadrocopter should be maximal 1/2 of the maximal thrust.

practical advice: these motors perform well and are very cheap, but quality is medium. I bought a total of 6 motor. 2 motors had shaft that was not 100% straight. You can't see it with your eyes. But ones they turn with your prop. You will see them dance :). This gives a lot of unwanted vibrations on your quadroframe and noise to your imu. So if you buy these motors, order more than you need :)