SunnySky XS X4112S KV450
Series: SunnySky Brushless motors for drones
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The X4112S KV450 belongs to the XS series from SunnySky, a Chinese maker, and is a powerful multicopter outrunner. The type code 4112 stands for a stator diameter of 41 mm and a height of 12 mm, and the layout has 12 slots.
According to the specification table it weighs 188 g, and its KV is 450. It is rated for operation up to 6S, and the recommended propellers are 14x4.7, 15x5.5 and 16x6. With the 16x6 at 25 V and 36.3 A it reaches 4,100 g of thrust. The maximum values of 1,000 W and 40 A apply for 30 s. The maker assigns it to 6S multicopters of up to 1.7 kg take-off weight per motor.
Because class C1 lies below 900 g, C2 below 4 kg and C3 and C4 below 25 kg, the take-off mass of the whole aircraft decides class and obligations; a quadcopter with 1.7 kg per motor would come to 6.8 kg and so exceed the C2 limit. Remote ID applies to C1 to C3. Motor, ESC and battery must share the same cell count.
In selection the current at hover load counts, not the 40 A peak: at around 1.7 kg per motor the motor works well below maximum thrust. The ESC must carry the 40 A with headroom. Check the bearings, the winding insulation and the bell's concentricity.
Technical data
Other data
| Cell count (S) | bis 6Scorrect |
|---|---|
| KV (rpm per volt) | 450correct |
| Maximum current (A) | 40 Acorrect |
| Maximum power (W) | 1,000correct |
| Maximum thrust (g) | 4,100correct |
| Power rating time base (s) | 30correct |
| Recommended propeller | 14x4.7 / 15x5.5 / 16x6correct |
| Stator size | 4,112 mmcorrect |
| Weight (g) | 188correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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