The Cobra C-2820/14 840Kv is a 840 kv motor with a 28 × 20 mm stator, weighing 140 g and rated to 36 A.
| Brand | Cobra |
|---|---|
| Model | Cobra C-2820/14 840Kv |
| kv | 840 |
| Max A | 36 |
|---|---|
| Phase resistance | 47.3 mΩ |
| Poles | 14 |
| Maker cells | — |
| Curve pack | 4S |
| Weight | 0.31 lb |
|---|---|
| Stator | 28×20 |
| Stator length | 20 mm |
| Max power | 530 W |
|---|
| Throttle | RPM | Thrust (lb) | Power (W) | Current (A) | Efficiency (%) | g/W |
|---|---|---|---|---|---|---|
| 30 % | 4,197 | 0.37 lb | 16 W | 0.9 | 61.2 | 10.1 |
| 40 % | 5,472 | 0.63 lb | 31 W | 1.8 | 70.8 | 9.19 |
| 50 % | 6,705 | 0.96 lb | 53 W | 3.1 | 76.3 | 8.21 |
| 60 % | 7,884 | 1.34 lb | 83 W | 4.9 | 79.4 | 7.34 |
| 70 % | 9,000 | 1.76 lb | 121 W | 7.2 | 81 | 6.61 |
| 80 % | 10,043 | 2.21 lb | 167 W | 10.1 | 81.6 | 6 |
| 90 % | 11,004 | 2.68 lb | 221 W | 13.5 | 81.5 | 5.49 |
| 100 % | 11,542 | 2.96 lb | 257 W | 15.8 | 81.2 | 5.23 |