The Cobra 4130/20 390Kv is a 390 kv motor with a 41 × 30 mm stator, weighing 396 g and rated to 55 A.
| Brand | Cobra |
|---|---|
| Model | Cobra 4130/20 390Kv |
| kv | 390 |
| Max A | 55 |
|---|---|
| Phase resistance | 32 mΩ |
| Poles | 14 |
| Maker cells | — |
| Curve pack | 7S |
| Weight | 0.87 lb |
|---|---|
| Stator | 41×30 |
| Stator length | 30 mm |
| Max power | — |
|---|
| Throttle | RPM | Thrust (lb) | Power (W) | Current (A) | Efficiency (%) | g/W |
|---|---|---|---|---|---|---|
| 30 % | 3,314 | 0.73 lb | 34 W | 1.2 | 70.1 | 9.68 |
| 40 % | 4,323 | 1.28 lb | 68 W | 2.3 | 78.2 | 8.57 |
| 50 % | 5,294 | 1.96 lb | 118 W | 4.1 | 82.5 | 7.56 |
| 60 % | 6,213 | 2.75 lb | 185 W | 6.5 | 84.9 | 6.73 |
| 70 % | 7,068 | 3.61 lb | 270 W | 9.7 | 86.2 | 6.06 |
| 80 % | 7,850 | 4.50 lb | 370 W | 13.5 | 86.7 | 5.52 |
| 90 % | 8,550 | 5.40 lb | 480 W | 18 | 86.7 | 5.1 |
| 100 % | 8,932 | 5.92 lb | 551 W | 21 | 86.6 | 4.88 |