Product overview
The HOBBYWING RTF 4315 is a brushless motor for FPV drone propulsion, available with 360KV and 520KV ratings. Weight figures are 250 g and 267 g including wire, without an explicit assignment of each weight to a KV variant. Its recommended electronic speed controller is the RTF 80A 4in1 8S Lite AT.
The recommended controller has a continuous current rating of 80A × 4 and accepts 4–8S LiPo input. Its stated application is 13–15-inch, four-axis FPV drones. These electrical ratings and application dimensions describe the controller.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and product purpose | HOBBYWING RTF 4315 brushless motor for FPV drone propulsion. |
| Model configurations | RTF 4315 360KV and RTF 4315 520KV.Two motor configurations are listed; select the required winding and battery configuration. |
| Motor dimensions | Diameter 50.8 × 36.3 mm.Both listed motor configurations. |
| Slots and poles | 12 slots and 14 poles.Both listed motor configurations. |
| Stator dimensions | Diameter 43 × 15 mm.Both listed motor configurations. |
| Bearing | MR126ZZ.Both listed motor configurations. |
| Stator material and coating | High-standard silicon steel sheet with a 180°C high-temperature-resistant paint coating.Both listed motor configurations. |
| Motor axle diameter | 6 mm.Both listed motor configurations. |
| Enameled wire insulation | 220°C high-temperature-resistant wire with Class C insulation.Both listed motor configurations. |
| Shaft length | 25 mm.Both listed motor configurations. |
| Insulation test | 500 V AC high-voltage withstand test.Published insulation-test specification for both listed configurations. |
| Motor mounting dimensions | Diameter 30 mm mounting pattern with four M4 mounting positions.Both listed motor configurations. |
| KV rating | 360KV / 520KV.Values correspond respectively to the 360KV and 520KV configurations. |
| Battery | 360KV: 8S LiPo; 520KV: 6S LiPo.Battery specifications correspond respectively to the 360KV and 520KV configurations. |
| No-load current | 360KV: 1.8 A; 520KV: 3.2 A.No-load values. |
| Maximum current | 360KV: 56.8 A for 26 s; 520KV: 74 A for 61 s.The table specifies non-hermetic conditions and ambient temperature ≤25°C. The published current limits include their respective durations. |
| Rated power output | 360KV: 560 W; 520KV: 620 W. |
| Maximum power | 360KV: 1813.5 W for 26 s; 520KV: 1755 W for 61 s.Maximum power is duration-qualified: 26 s for 360KV and 61 s for 520KV. |
| Maximum thrust | 360KV: 7.18 kg; 520KV: 5.3 kg.Maximum thrust; the supplied table does not identify the propeller or measurement conditions for these figures. |
| Resistance | 360KV: 57 mΩ; 520KV: 30 mΩ. |
| Wire size | 360KV: 16 AWG; 520KV: 14 AWG. |
| Wire length | 500 mm.Both listed motor configurations. |
| Weight with wire | 360KV: 250 g; 520KV: 267 g.Weight includes wire, as specified by the table heading. |
| Recommended propellers and ESCs | Propellers: HQ15x7x3 and HQ13x10x3. ESCs: RTF 80A 4in1 8S Lite AT, XRotor FPV 80A G2 4in1 ESC, and RTF 100A 4in1 8S Lite AT.Manufacturer recommendations, not a supplied-parts list or universal compatibility statement. |
| Propeller-mount cooling | Self-cooling propeller mount.Design feature. |
| Propeller-mount retention design | Anti-slip tooth structure on the propeller mount.Design feature. |
| Stator lamination thickness | 0.2 mm stator core laminations. |
| Winding construction | Multi-strand enameled-wire winding, with a claimed slot fill increase of approximately more than 5%.Manufacturer's approximate comparative claim. |
| Magnet architecture | Arc-shaped magnets. |
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