ECOII Series / 47XX / ECO II
ECO II 4720 Brushless Motor
A high-output 4720-class aircraft motor with 290KV and 380KV options for large FPV, 15-inch propeller systems, and heavy-lift aerial platforms.
290KV380KV
KEY FEATURES
Designed for FPV performance tuning
- Two KV choices cover 6S through 12S aircraft power systems with 15-inch propellers.
- Precision bearings, a steel shaft, multi-strand winding, and an anodized motor structure support reliable high-load operation.
- A 30 x 30 mm four-hole M4 mounting pattern, 360 mm 13 AWG silicone leads, and an M6 propeller shaft simplify aircraft integration.
- Verified load-test data is provided for the 290KV and 380KV versions with an HQ 15 x 7 three-blade propeller.
SPECIFICATIONS
Product snapshot
- Stator Size
- 4720
- Series
- ECO II
- KV Options
- 290KV, 380KV
- Motor Dimensions
- 55.1 x 71 mm
- Framework
- 12N14P
- Weight
- 324 g without silicone wire
- Propeller
- 15 inch
- Bearing Shaft
- 8 mm
- Prop Adapter Shaft Thread
- M6
- Shaft Thread
- CW
- Mounting Pattern
- 30 x 30 mm, 4 x M4
- Lead
- 360 mm 13 AWG silicone wire
VARIANT SPECIFICATIONS
KV configuration matrix
| KV | Battery cells | Propeller | Idle current | Internal resistance | Peak current | Maximum power |
|---|---|---|---|---|---|---|
| 290KV | 12S | 15 inch | 1.7 A @ 10 V | 47 mOhm | 77 A @ 12S | 3696 W @ 12S |
| 380KV | 6-8S | 15 inch | 2.4 A @ 10 V | 32 mOhm | 72 A | 2420 W |
OFFICIAL GRAPHICS
Engineering drawing and specifications
| SPECIFICATIONS | |
|---|---|
| Framework | 12N14P |
| Length | 71 mm |
| Diameter | 55.1 mm |
| Battery cells - 290KV | 12S |
| Battery cells - 380KV | 6-8S |
| Recommended propeller | 15 inch |
| Weight (without silicone wire) | 324 g |
| Prop adapter shaft thread | M6 |
| Bearing shaft | 8 mm |
| Shaft thread | CW |
| FEATURES | |
| Precision bearing | |
| Steel shaft | |
| Anodized finish | |
| 30 x 30 mm, 4 x M4 mounting-hole pattern | |
| Multi-strand winding | |
| 360 mm 13 AWG silicone wire | |
| PACKAGE INCLUDES | |
| 4 x M4 x 14 screws | |
| 1 x steel M6 nyloc nut | |
| 1 x paddle gasket | |
LOAD TEST DATA
Verified performance data
The following measurements are from EMAX load-test records. Results may vary with battery, propeller, environment, and installation conditions.
290KV
HQ 15 x 7, 3-blade
| VoltageV | CurrentA | Thrustg | PowerW | Efficiencyg/W | SpeedRPM |
|---|---|---|---|---|---|
| 48 | 1.12 | 460 | 53.8 | 8.56 | 2498 |
| 48 | 2.95 | 1100 | 141.6 | 7.77 | 3676 |
| 48 | 6.17 | 1972 | 296.2 | 6.66 | 4825 |
| 48 | 11.1 | 3046 | 532.8 | 5.72 | 5916 |
| 48 | 17.9 | 4275 | 859.2 | 4.98 | 6937 |
| 48 | 26.7 | 5440 | 1281.6 | 4.24 | 7889 |
| 48 | 38.8 | 7060 | 1862.4 | 3.79 | 8820 |
| 48 | 53.7 | 8315 | 2577.6 | 3.23 | 9668 |
| 48 | 76.5 | 10387 | 3672 | 2.83 | Max |
380KV
HQ 15 x 7, 3-blade
| VoltageV | CurrentA | Thrustg | PowerW | Efficiencyg/W | SpeedRPM |
|---|---|---|---|---|---|
| 33.6 | 0.33 | 83 | 11.09 | 7.49 | 1144 |
| 33.6 | 1.27 | 396 | 42.67 | 9.28 | 2248 |
| 33.6 | 3.13 | 874 | 105.17 | 8.31 | 3290 |
| 33.6 | 6.37 | 1549 | 214.03 | 7.24 | 4314 |
| 33.6 | 11.4 | 2382 | 383.04 | 6.22 | 5282 |
| 33.6 | 18.3 | 3335 | 614.88 | 5.42 | 6222 |
| 33.6 | 27.2 | 4297 | 913.92 | 4.7 | 7109 |
| 33.6 | 38.2 | 5325 | 1283.52 | 4.15 | 7871 |
| 33.6 | 52 | 6425 | 1747.2 | 3.68 | 8657 |
| 33.6 | 70.3 | 7693 | 2362.08 | 3.26 | Max |
APPLICATIONS
Recommended use
large FPVheavy-lift multirotor platforms15-inch propeller systemsindustrial and custom aircraft projectsspecialty builds