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?
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.
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.
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.
Here is some footage from these motors.