Product overview
The HOBBYWING RTF 4218 is an FPV propulsion motor offered in 350KV and 560KV versions. Procurement therefore concerns a motor component. Its construction combines a 12N14P slot-and-pole arrangement, 626ZZ bearings and arc-shaped magnets. The propeller mount incorporates cooling features and anti-slip teeth. HOBBYWING also describes multi-strand windings and thin stator laminations.
Both variants have a published motor envelope of 50mm diameter by 39.8mm height and a stator measuring 42mm diameter by 18mm. The listed mechanical interfaces include a 6mm axle, a 25mm shaft and a 30mm mounting pattern with four M4 positions. These dimensions provide a starting point for checking installation space and attachment geometry, subject to confirmation of the selected configuration. Both versions list 500mm, 14AWG wiring. Published mass includes that wire: 287g for the 350KV version and 285g for the 560KV version.
Electrical selection differs by variant: the 350KV motor is listed for 8S LiPo, while the 560KV motor is listed for 6S LiPo. Recommended combination: specific propeller and ESC combinations without stating that these items are supplied. Rated outputs are 560W and 624W respectively. Maximum current carries a non-hermetic, ambient-temperature qualification of ≤25°C, while maximum current and power also carry variant-specific time limits. Published maximum thrust is 7.3kg or 7.7kg, but the supplied table does not identify the measurement setup; buyers should confirm the intended combination before relying on those figures.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer | HOBBYWING |
| Product and variants | HOBBYWING RTF 4218 FPV motor; 350KV and 560KV variants. |
| Motor size | Diameter 50mm × height 39.8mm.Published dimensions apply to both variants. |
| Slots and poles | 12N14P for both variants. |
| Stator size | Diameter 42mm × 18mm.Published dimensions apply to both variants. |
| Bearing | 626ZZ for both variants. |
| Stator process | High-standard silicon steel sheet with a 180°C high-temperature-resistant paint coating.The 180°C qualification describes the stator coating. |
| Motor axle diameter | 6mm for both variants. |
| Enameled wire | 220°C high-temperature-resistant wire with Class C insulation.The temperature and insulation class describe the enameled wire. |
| Shaft length | 25mm for both variants. |
| Insulation test | 500V AC high-voltage resistance test.Published insulation-test specification. And test documentation. |
| Motor mounting dimensions | Diameter 30mm mounting pattern with four M4 positions.Published mounting dimensions apply to both variants. |
| KV | 350KV or 560KV.Select the corresponding motor variant. |
| Battery | 350KV: 8S LiPo; 560KV: 6S LiPo.Battery specification is variant-specific; battery inclusion is not stated. |
| No-load current | 350KV: 1.8A; 560KV: 3.3A.No-load values. |
| Maximum current | 350KV: 66A/33s; 560KV: 95A/42s.Non-hermetic conditions at ambient temperature ≤25°C; published durations are 33s for 350KV and 42s for 560KV. |
| Rated power output | 350KV: 560W; 560KV: 624W. |
| Maximum power | 350KV: 2101W/33s; 560KV: 2267W/42s.Time-qualified maximum values: 33s for 350KV and 42s for 560KV. |
| Maximum thrust | 350KV: 7.3kg; 560KV: 7.7kg.Maximum thrust; the supplied table does not identify the propeller or measurement setup for these values. |
| Resistance | 350KV: 46mΩ; 560KV: 25mΩ. |
| Wire size | 14AWG for both variants. |
| Wire length | 500mm for both variants. |
| Weight with wire | 350KV: 287g; 560KV: 285g.Published weights include wire. |
| Recommended propellers | 350KV: HQ13x10x3, HQ15x7x3 or HQ15x10x3; 560KV: HQ13x9x3, HQ13x10x3 or HQ15x7x3.Manufacturer-recommended application combinations; propeller inclusion and universal compatibility are not established. |
| Recommended ESCs | 350KV: RTF 80A 4in1 8S Lite AT or RTF 100A 4in1 8S Lite AT; 560KV: RTF 100A 4in1 8S Lite AT.Manufacturer-recommended application combinations; ESC inclusion is not stated. The 560KV combination specifies a 6S battery despite the ESC's 8S model designation. |
| Propeller-mount cooling | Self-cooling propeller mount.Cooling feature. |
| Propeller retention feature | Anti-slip tooth structure on the propeller mount.Mechanical feature. |
| Stator lamination thickness | 0.2mm. |
| Winding architecture | Multi-strand enameled-wire winding.The manufacturer compares operating temperature at identical power output. |
| Magnet architecture | Strong arc-shaped magnets. |
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