EMAX ECOII-4720 Brushless Motor 6-12S 290KV/380KV, 55.1×71mm, M6 CW Shaft, 15in Prop
EMAX ECOII-4720 Brushless Motor 6-12S 290KV/380KV, 55.1×71mm, M6 CW Shaft, 15in Prop
Emax
Regular price
$145.14 USD
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$145.14 USD
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Overview
EMAX ECOII-4720 is a brushless motor offered in 290KV (6-12S) and 380KV (6-8S) variants, designed around a 55.1 x 71 mm motor size with an M6 prop adapter shaft thread and support for 15-inch propellers.
Key Features
- Precision bearing
- Steel shaft
- Anodizing
- 30 x 30 mm hole pattern
- Multi-strand winding
- 360 mm 13 AWG silicone wire
Specifications
| Model | ECOII-4720 |
| Framework | 12N14P |
| Motor dimensions | φ55.1 x 71 mm |
| Length | 71 mm |
| Diameter | 55.1 mm |
| Propeller | 15" |
| Weight | 324 g (W/O Silicone Wire) |
| Prop adapter shaft thread | M6 |
| Bearing shaft | 8 mm |
| Shaft thread | CW |
| Mounting | 4 x M4, φ30 |
| Lead wire | 13 AWG, 360 mm |
| Threaded shaft length | 25 mm |
| KV / cells (290KV) | 290KV, 6-12S |
| KV / cells (380KV) | 380KV, 6-8S |
Electrical Specifications (Test Data)
| Test item | KV290 |
| Idle current (10V) | 1.7 A |
| Internal resistance | 47 mΩ |
| No. of cells | 12S |
| Peak current (12S) | 77 A |
| Max. power (12S) | 3696 W |
| Test item | KV380 |
| Idle current (10V) | 2.4 A |
| Internal resistance | 32 mΩ |
| No. of cells | 6-8S |
| Peak current (12S) | 72 A |
| Max. power (12S) | 2420 W |
Thrust Data (ECOII-4720-290KV)
Test conditions: 48 V, HQ 15*7*3 blade propeller
| Voltage (V) | Propeller | Current (A) | Thrust (G) | Power (W) | Efficiency (G/W) | Speed (RPM) |
|---|---|---|---|---|---|---|
| 48 | HQ 15*7*3 blade propeller | 1.12 | 460 | 53.8 | 8.56 | 2498 |
| 48 | HQ 15*7*3 blade propeller | 2.95 | 1100 | 141.6 | 7.77 | 3676 |
| 48 | HQ 15*7*3 blade propeller | 6.17 | 1972 | 296.2 | 6.66 | 4825 |
| 48 | HQ 15*7*3 blade propeller | 11.1 | 3046 | 532.8 | 5.72 | 5916 |
| 48 | HQ 15*7*3 blade propeller | 17.9 | 4275 | 859.2 | 4.98 | 6937 |
| 48 | HQ 15*7*3 blade propeller | 26.7 | 5440 | 1281.6 | 4.24 | 7889 |
| 48 | HQ 15*7*3 blade propeller | 38.8 | 7060 | 1862.4 | 3.79 | 8820 |
| 48 | HQ 15*7*3 blade propeller | 53.7 | 8315 | 2577.6 | 3.23 | 9668 |
| 48 | HQ 15*7*3 blade propeller | 76.5 | 10387 | 3672.0 | 2.83 | Max |
Thrust Data (ECOII-4720-380KV)
Test conditions: 33.6 V, HQ 15*7*3 blade propeller
| Voltage (V) | Propeller | Current (A) | Thrust (G) | Power (W) | Efficiency (G/W) | Speed (RPM) |
|---|---|---|---|---|---|---|
| 33.6 | HQ 15*7*3 blade propeller | 0.33 | 83 | 11.1 | 7.49 | 1144 |
| 33.6 | HQ 15*7*3 blade propeller | 1.27 | 396 | 42.7 | 9.28 | 2248 |
| 33.6 | HQ 15*7*3 blade propeller | 3.13 | 874 | 105.2 | 8.31 | 3290 |
| 33.6 | HQ 15*7*3 blade propeller | 6.37 | 1549 | 214.0 | 7.24 | 4314 |
| 33.6 | HQ 15*7*3 blade propeller | 11.40 | 2382 | 383.0 | 6.22 | 5282 |
| 33.6 | HQ 15*7*3 blade propeller | 18.30 | 3335 | 614.9 | 5.42 | 6222 |
| 33.6 | HQ 15*7*3 blade propeller | 27.20 | 4297 | 913.9 | 4.70 | 7109 |
| 33.6 | HQ 15*7*3 blade propeller | 38.20 | 5325 | 1283.5 | 4.15 | 7871 |
| 33.6 | HQ 15*7*3 blade propeller | 52.00 | 6425 | 1747.2 | 3.68 | 8657 |
| 33.6 | HQ 15*7*3 blade propeller | 70.30 | 7693 | 2362.1 | 3.26 | Not specified |
What's Included
- 4 x M4 x 14 screw
- 1 x steel M6 nylock nut
- 1 x paddle gasket
Applications
- Multirotor builds using 15-inch propellers
- 6-12S / 6-8S brushless power setups (variant dependent)
For compatibility checks (prop/ESC/battery) or ordering support, contact support@rcdrone.top or visit https://rcdrone.top/.
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