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The EMAX ECO II 6218 is a high-torque external-rotor brushless motor for 18- to 22-inch multirotor propellers. Two 12S winding options—180KV and 200KV—use a 24N28P architecture, Ø69.3 × 66.2mm body, M6 threaded propeller shaft and 30 × 30mm mounting pattern. At 431g with wire, it is engineered for large FPV aircraft and heavy-lift propulsion systems.
Large-prop 12S propulsion. The supplied 180KV bench data records up to 14.169kg thrust at 47.66V with a JXF 22 × 10 carbon-fiber two-blade propeller.
Published electrical limits and tested thrust values are transcribed from the official EMAX product specification and load-test sheets.
Choose from the complete aircraft backward. Match motor KV to battery voltage, propeller load, ESC rating, aircraft mass, airflow and required thrust. Published ranges are selection guidance; validate the final power system under realistic thermal conditions.
Each bar shows the highest thrust recorded in the official test sheet for that winding. Both bars share a 14.169kg scale.
Maximum values were recorded with a JXF 22 × 10 CF two-blade propeller for 180KV and an HQ 20 × 10 three-blade propeller for 200KV. Bench results are configuration-dependent.
A 6mm bearing section supports the rotating assembly, while the M6 CW threaded propeller interface provides secure retention.
Anodized metal surfaces provide a durable finish for regular installation and service.
A four-hole 30 × 30mm pattern accepts M4 mounting hardware at the airframe interface.
Multi-strand winding is specified for the high-current operating range of this large outrunner.
Concentric bearing support promotes smooth shaft rotation under sustained large-propeller load.
Long, heavy-gauge silicone motor leads provide routing flexibility in large-aircraft installations.
| Motor model | EMAX ECO II 6218 |
|---|---|
| Framework | 24N28P |
| Motor diameter | Ø69.3mm |
| Motor length | 66.2mm |
| Weight | 431g with wire |
| Bearing shaft | Ø6mm |
| Propeller shaft | M6 threaded |
| Shaft direction | CW thread |
| Mounting pattern | 30 × 30mm, four M4 holes |
| Motor leads | 400mm 14 AWG silicone wire |
| Propeller specification | 18–22 inches, KV-dependent |
| KV options | 180KV / 200KV |
The shared mechanical package lets builders select 180KV or 200KV around the intended propeller load without changing the 30 × 30mm four-hole airframe interface.
The 180KV winding supports the broadest published propeller range, while 200KV provides the higher-RPM choice for 18- to 21-inch propellers.
Installation note: Confirm frame clearance, screw engagement, propeller retention, ESC headroom and cooling before operation.
Serious lift with practical value. The ECO II 6218 combines a 24N28P heavy-lift platform with two 12S winding choices for builders matching propeller size, current and thrust targets.
Use only the published voltage and propeller range for the selected winding. Confirm ESC current capability and thermal headroom for the complete aircraft.
| KV | Cells | Propeller | Idle Current | Resistance | Peak Current | Max Power |
|---|---|---|---|---|---|---|
| 180KV | 12S | 18–22" | 1.3A @ 10V | 42mΩ | 73.7A | 3510W |
| 200KV | 12S | 18–21" | 1.5A @ 10V | 39mΩ | 79A | 3765W |
The expandable tables show the final, highest-load row from each propeller set in the supplied workbooks.
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 47.73V | GF 18 × 10, 3-blade | 61.89A | 11,533g | 2954.0W | 3.90g/W | 7,080 |
| 47.72V | HQ 20 × 10, 3-blade | 64.63A | 12,384g | 3084.1W | 4.02g/W | 7,017 |
| 47.74V | FL 21 × 10 CF, 2-blade | 59.87A | 12,248g | 2858.2W | 4.29g/W | 7,109 |
| 47.69V | FL 22 × 10 CF, 2-blade | 68.80A | 13,539g | 3281.1W | 4.13g/W | 6,951 |
| 47.66V | JXF 22 × 10 CF, 2-blade | 73.66A | 14,169g | 3510.6W | 4.04g/W | 6,866 |
Maximum-throttle row from each official 180KV propeller series.
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 47.75V | HQ 18 × 9, 3-blade | 60.63A | 11,147g | 2895.1W | 3.85g/W | 7,672 |
| 47.68V | GF 18 × 10, 3-blade | 71.92A | 12,413g | 3429.1W | 3.62g/W | 7,463 |
| 47.65V | HQ 20 × 10, 3-blade | 79.02A | 13,857g | 3765.3W | 3.68g/W | 7,338 |
| 47.78V | FL 19 × 10 CF, 2-blade | 54.02A | 10,213g | 2581.1W | 3.96g/W | 7,804 |
| 47.74V | FL 20 × 10 CF, 2-blade | 60.71A | 11,309g | 2898.3W | 3.90g/W | 7,671 |
| 47.69V | FL 21 × 10 CF, 2-blade | 70.58A | 13,123g | 3366.0W | 3.90g/W | 7,486 |
Maximum-throttle row from each official 200KV propeller series.
Package contents: one EMAX ECO II 6218 brushless motor, four M4 × 14mm mounting screws, one steel M6 nylock nut, one propeller shaft sleeve and one paddle gasket.
