DYS recently released a new 2207 motor retails for only $12 – the Sun Fun SF2207. Is this the new best “cheapest mini quad motor”? Let’s find out in this review.
Check out this buyers guide on how to choose mini quad motors.
Where to Buy?
- Banggood: http://bit.ly/2U5bRxD (2400KV / 2750KV)
- Amazon: https://amzn.to/2mXWETr
Note that the 1750KV version is only rated for 4S to 5S, and not 6S, it would make more sense to run it with 7″ propellers on 4S.
Inside the box, it comes with the motor, a propeller lock nut, 5x M3 5mm motor screws, and 2x spare C-clips.
Specs and Features
- Supports 4S and 5S LiPo
- Motor mounting hole pattern: 16x16mm
- Weight: 36.4g (my measurement)
- Motor wires: 20awg 15cm
There is not much info regarding the materials and construction of the DYS Sunfun 2207 motor, so I am not 100% sure what kind of bearing, stator lamination, type of magnets they are using… I can only assume these are similar to the Samguk series, which is why it’s so cheap.
Bear in mind, premium 2207 motors can cost up to $25 each, these Sunfun motors are less than half the price at $12 a piece. You get what you pay for!
Sun Fun 2207 vs. Wei 2207
One of the cheapest mini quad motors are probably the DYS Samguk Wei, these are only $10 each. You can still find them on here: http://bit.ly/2zTZGgZ.
DYS Wei 2207 Motor
Two years later, DYS released a new 2207 motors that is also extremely affordable. From what I’ve learned, they didn’t just change the bell design and call it a new motor, there are actually design differences.
First off, the motor windings are thicker in the Sunfun 2207. That might be why it can now support up to 5S. The Wei only supports up to 4S.
The Sun-fun 2207 has slightly higher KV than the Wei, i.e. 2400KV vs. 2300KV, and 2750KV vs. 2600KV.
The airgap (space between permanent magnets and stator) has been noticeably increased in the SF2207. Theoretically this should make a more efficient and smoother motor, more suited for freestyle flying.
As you can see, the motor bell design is completely different. Perhaps that’s why, combined with the thicker windings, the Sunfun motor is about 1g to 2g heavier than the Wei 2207.
The included spare C-Clips are a nice touch too, but I really don’t think a lot of people actually know how to remove C-clips and put them back on. Instead of C-clip, It would have been nice to use a screw to hold the shaft in place, but I guess drilling the hole is too expensive on a cheap motor.
Removing motor bell from stator – image provided by DYS
The bearing appears to be 8mm x 3mm (OD/ID), which is known to be weaker than the 9mm x 4mm in crashes. But because of the smaller bearings, they can be slightly smoother in terms of flight performance. So that can be a good thing depends on what angle you look at it.
I have been hearing quite a few complaints about the durability of the bearings in the Wei 2207, and they are very likely to be the same bearings in the new Sunfun motors (at least the same size). I am curious to find out how well they hold up since I’ve never actually flown the Wei motors.
Testing
Here is some footage from these motors.
13 comments
Well just ordered 2450kv motors for a 5″ drone and I am still wondering if I should go with 4S batteries or try 6S ?
I haven’t ordered batteries or charger yet. Maybe I will go for 6s and Imax B6 v2 charger.
2450kv is for 4S lipo, but it’s possible to use 6S by following this steps: https://oscarliang.com/4s-6s-lipo-same-motors/
Well, after some thinking I cancelled the Order and bought 1750kvs
Well I cancelled the order from Aliexpress and ordered the 1750kv motors.
Man these guys give you he’ll! Rather than just give you their opinion they slaughter yours first. Maybe they should open their own blog. Just saying.
I messaged DYS about the 1750 and 5s – they said its fine for 6s – i just put a set on my 6s rig this morning – so far in hover zero issues, no heat. ill do a full flight once it quits raining. i cant post a screenshot – but they said they never tested it at 6s, so they didnt put it on the documentation, but on suggestion – they are going to test it – and if it works – they will update the documentation
On DYS website there is not an 2400 KV option for this motor, instead they have 2450 KV. Also Banggood sent me 2450 KV motor where it was advertised as 2400KV. May be they first produced 2400 KV motors and later they decided on 2450 KV. Do you have an idea?
I am not entirely sure. But I highly doubt the difference is that noticeable in flight.
Coupons can not be used on the products labeled with the “PROMO” or “VIP” tag.
I actually cant get over the fact these still use c-clips. Looking at other budget motors that have gone away from these…. That is a big factor for why i think NO ONE should buy these. Too often I crash and get dirt, grass, mud or what ever in my motor. Like you stated… almost no one knows how to get them off and back on.. even I gave up on my last attempt.
Compare with the 3Bhobby Trainers as well. The wei are old news. And your comment “drilling a hole may be too expensive for a cheap motor” regarding the c-clip, not true. The eco has a bolt instead of c-clip. Lets get a good comparison of whats available Today, not years ago. Also, my wei run fine of 5s, I just run a throttle limit on my Tc
can you compare it with the emax eco? It is the exact same price.
Traditionally I have found DYS and EMAX to have similar quality (motors on similar prices). I might check out the Eco after I’ve tested the Sunfun motors.