The Cobra C-4120/12 850Kv is a 850 kv motor with a 41 × 20 mm stator, weighing 293 g and rated to 75 A.
| Brand | Cobra |
|---|---|
| Model | Cobra C-4120/12 850Kv |
| kv | 850 |
| Max A | 75 |
|---|---|
| Phase resistance | 14 mΩ |
| Poles | 14 |
| Maker cells | — |
| Curve pack | 3S |
| Weight | 0.65 lb |
|---|---|
| Stator | 41×20 |
| Stator length | 20 mm |
| Max power | 1,390 W |
|---|
| Throttle | RPM | Thrust (lb) | Power (W) | Current (A) | Efficiency (%) | g/W |
|---|---|---|---|---|---|---|
| 30 % | 3,200 | 0.43 lb | 19 W | 1.5 | 52 | 10.32 |
| 40 % | 4,176 | 0.73 lb | 34 W | 2.6 | 63 | 9.8 |
| 50 % | 5,117 | 1.10 lb | 55 W | 4.3 | 70 | 9.04 |
| 60 % | 6,015 | 1.53 lb | 84 W | 6.6 | 74.4 | 8.28 |
| 70 % | 6,860 | 2.00 lb | 119 W | 9.6 | 77.2 | 7.6 |
| 80 % | 7,644 | 2.49 lb | 161 W | 13.1 | 78.8 | 7.01 |
| 90 % | 8,360 | 3.00 lb | 209 W | 17.3 | 79.6 | 6.51 |
| 100 % | 8,757 | 3.30 lb | 239 W | 20.1 | 79.8 | 6.25 |