# Mini Quad Motors: 2306 vs. 2207 Stator Size

To give you a little technical background, the numbers 2306 and 2207 are the different stator sizes. The first 2 digits are the stator width, the last two digits are stator height.

2306 is wider but shorter, while the 2207 is taller but thinner.

It’s hard to find 2306 and 2207 motors of the same construction, features and material to make a fair comparison. This article is based on my experience with the motors I have flown with, and feedback from many pilots I’ve talked to.

# Theoretical Differences between 2207 and 2306

### Stator Width & Height

2207 has a narrower stator width, results in a smaller rotational inertia that allows for faster RPM changes. The taller stator creates a larger “surface area” and increases magnet size, therefore it can cut through more magnetic field.

Compared to a 2206, 2306 has a wider stator which increases the stator volume and coil size more than the permanent magnets. This makes a more torquey and efficient motor.

### Stator Volume

2306 and 2207 motors have different dimensions, hence different stator volumes:

• 2306: (23/2)^2 x 3.14 x 6 = 2491.59
• 2207: (22/2)^2 x 3.14 x 7 = 2659.58

The 2207 motor has 6.3% more volume, so it’s normally heavier than 2306. For example, the Dragonfly Hurricane 2207 is about 32g while the Brotherhobby R5 2306 are about 29g.

Assuming all other variables are equal, 2207 would have more torque since stator volume is a factor of motor torque.

It’s impossible to say definitively what performance you will get on a 2306 or 2207 motor, because it hugely depends on the design features and material used. Things like the amount of copper, type of magnet, air gap, stator lamination etc, all play a part in the performance of a motor.

But purely based on the different stator sizes, the general impression is that 2207 has more top end power and can change RPM more effective in high throttle range, while 2306 gives you more low end throttle response and resolution.

# Real Life Experience

The differences between 2306 and 2207 are very subtle but you can tell they are different if you fly them long enough.

2306 has better power and response at the low and mid throttle range, but missing the power you would expect at top throttle. 2207 has a more linear power to throttle curve, and it really pops at higher throttle.

These motors also seem to change my flying style a little.

With the 2306, I really enjoy cruising and flying close proximity thanks to the extra throttle response I get around 30% to 70%. When flying 2207 I can’t help myself doing more acrobatic moves and my flights were more dynamic.

On many motor thrust tests you can see 2207 typically draws more current at max throttle and tends to be less efficient than 2306. But that doesn’t necessarily mean it will impact your flight time by any noticeable amount since we don’t pull full throttle a lot in real flights.

# Should I Choose 2306 or 2207 Motor?

For beginners, I really don’t think the differences are that noticeable. There are some other influential factors when picking a motor like the construction of a motor, design features, user feedback/reviews etc.

For more experienced pilots, you might notice the subtle differences and IMO the decision comes down to your flying style and setup.

If your style is more dynamic and acrobatic, 2207 might be a better choice because of the awesome top end power. 2207 is also favoured in racing due to this reason.

2306 is a little bit more “gentle” IMO, and it’s great for those who prefer smoother freestyle. The excellent low end control would also work great for tight race courses.

Whichever motor you choose, beware that it will impact your prop choice too. 2306 should handle aggressive props better than 2207. It might be able to handle it, but it might draw more current and be less efficient.

The weight of the quad also plays a big part. From my observation, 2207 is a lot more popular for lighter mini quad (below 350g dry weight?) while 2306 is more often used on a heavier rig.

# Motor Recommendations

I really like the Dragonfly Hurricane 2207 for its value, and the BrotherHobby R5 2306 for its performance.

## 11 thoughts on “Mini Quad Motors: 2306 vs. 2207 Stator Size”

1. William Mitchell

I always refer to your blogs for its informative content. I’m definitely going to try 2207’s soon as another factor ihe 2207 will have a theoretical up to about 11% greater surface area to radiate it’s magnetic field.
Best wishes,
William Mitchell

2. AngrySnoYeti

Hi oscar new to the hobby also my setup is
Lumenier qav-r2 frame
Matek f405 std FC
Lumenier 35a 4in1 ESC
And i just added 3bhobby 2306 2500kv freestyle motors to it
My question is what it the best size blade to put on this set up should i put a 4.8×3.8×3 or 5x5x3 prop size. The quad is going to be mainly a smooth runner but i want it to pull out of a dive once i get the balls to try flips.

1. Oscar Post author

why not give them both a try and decide for yourself? Props are so cheap you can try a few different ones.

3. cactus

I’m looking to build a copter that would handle both 5 and 6″ props well, with the aim of doing more technical freestyle in smaller areas on 5″ and longer range cruising on 6″, and I’m torn between whether to go with 2207-08 or 2306-07. Theoretically, the better low RPM performance of the 23 diameter stator would mean it will handle 6″ props better, but I’m not sure how it will play out. Maybe the overall wider power zone of 2208 is more significant than the RPM at which it works best.
I’ve tried comparing them by trying out different motor/prop combos in Liftoff but I don’t know how representative of the real life nuances that is.
Also, would putting more aggressive 5″ props on 2306 make it better at the top end?

4. Ben

Thank you Oscar for this knowledge. But I am a little confused since Joshua Bardwell is saying that he likes 2207 more for having more controll in the lower throttle area…
🤔
Cheers Ben.

1. Oscar Post author

He’s right in a way, 2208 has slightly more torque than 2207, but you also have to take into account of the weight increase.
It’s just a personal preference. for me 2207 is powerful enough, and it’s lighter, giving the quad less momentum thus more responsive and efficient.

5. Steve Sartor

Thanks for the great info. The bottom line for me: at my experience level, it doesn’t matter.

6. Hafiz

Good day Oscar

I am new to this hobby. I got two race quad with huge difference in flight performance. One with 2306 2600kv Tmotor f40 pro ii with 215mm frame size and another one with 2207 2550kv emax LS with 200mm frame size, both true x frame. I use this two rig for race. Both use clracing f4s fc and gemfan hurricane 51499 props. Not a serious race, just a hobby while improving my skills.

2207 with 200mm frame size was so nimble than 2306 with 215mm frame size. I put a gopro 5 session on 2207 rig and still nimble and easy to control at corner than 2306 rig without a gopro.

Probably 2207 with smaller rotational inertia and faster RPM changes helps the responsiveness and smaller frame size are much more nimble in roll and pitch, easy to control in corner.

I will get another same 200mm frame size and put it to 2306 rig and share the results later.

This is just my personal opinion. I love to discuss and share my thought. The most important thing is I am not a fans to any products.

7. AUDI SHARIFFIN

Thank you, this is remarkable info. 2306 vs 2207 has always been in my mind, finally you have gave a crystal clear picture of the differences between the two enough for me to make a choice for the next build. However, I would ask an opinion, the next build would be a long range 6 inch with gps & run cam split with low kv on 4s. Which is a better choice between BH R6 2306 1700kv or BH R3 2206 1720kv as per your reviews.

For prompt technical support, please use our forum IntoFPV.com. I check blog comments weekly.