Product overview
The HOBBYWING RTF 4320 is a 380KV brushless propulsion motor for FPV drones, specified for an 8S LiPo battery. Its physical architecture combines a Φ43 × 20 mm stator, a 12N14P slot-and-pole arrangement, MR126ZZ bearings and a Φ6 mm motor axle. Arc-shaped magnets support its magnetic design, while 0.2 mm stator laminations and multi-strand enameled windings form the core construction. The winding design increases slot fill by approximately more than 5%, with lower operating temperatures described at identical power output.
For mechanical integration, the motor measures Φ50.8 × 41.3 mm and uses a Φ30 mm–4 × M4 mounting interface, with a 25 mm shaft length. Electrical integration uses 14 AWG wire measuring 500 mm, and the motor weighs 320 g with wire. The recommended application pairing is an HQ15x10x3 propeller and an RTF 80A 4in1 8S Lite AT ESC. These are recommended integration components; the product configuration described is the motor, with its wire included in the weight specification.
Rated output is 831 W, while maximum power is specified as 2843 W for 22 seconds. Maximum current is 89 A for 22 seconds in a non-hermetic environment at an ambient temperature of ≤25°C. Maximum thrust is 8.7 kg, with 2.2 A no-load current and 33 mΩ resistance. Thermal provisions include a self-cooling propeller mount, a 180°C-resistant stator coating and 220°C-resistant Class C enameled wire. The mount also uses anti-slip teeth intended to prevent propeller slippage and rotation loss.
Specifications
| Specification | Value & conditions |
|---|---|
| Model and product type | HOBBYWING RTF 4320 380KV brushless motor for FPV drones |
| Motor dimensions | Φ50.8 × 41.3 mm |
| Slots and poles | 12N14P |
| Stator dimensions | Φ43 × 20 mm |
| Bearing | MR126ZZ |
| Stator construction and coating | High-standard silicon steel sheet with a 180°C high-temperature-resistant paint coating |
| Motor axle diameter | Φ6 mm |
| Enameled wire insulation | 220°C high-temperature-resistant enameled wire with Class C insulation |
| Shaft length | 25 mm |
| Insulation test | 500 V AC high-voltage withstand test500 V AC insulation test. |
| Motor mounting dimensions | Φ30 mm–4 × M4 |
| KV | 380 |
| Battery specification | 8S LiPo |
| No-load current | 2.2 ANo-load operation. |
| Maximum current | 89 A / 22 sNon-hermetic environment; ambient temperature ≤25°C; 22-second duration. |
| Rated power output | 831 W |
| Maximum power | 2843 W / 22 s22-second duration. |
| Maximum thrust | 8.7 kg |
| Resistance | 33 mΩ |
| Wire size | 14 AWG |
| Wire length | 500 mm |
| Weight | 320 gWith wire. |
| Recommended propeller | HQ15x10x3Recommended application combination. |
| Recommended ESC | RTF 80A 4in1 8S Lite ATRecommended application combination. |
| Propeller-mount cooling | Self-cooling propeller mount designed to dissipate coil heat during flightDuring flight. |
| Propeller retention design | Toothed anti-slip propeller mount intended to prevent propeller slippage and rotation loss |
| Stator lamination thickness | 0.2 mm stator core laminations |
| Winding construction | Multi-strand enameled wire winding; slot fill increase described as approximately more than 5%Lower operating temperatures at identical power output. |
| Magnet architecture | Arc-shaped magnets designed to increase magnetic flux density and magnetic field intensity |
| Torque and efficiency characteristics | Magnetic design intended to increase torque, power and overall efficiency at the same currentAt the same current. |
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