R4320 350KV Brushless Motor – Heavy-Duty Power for VTOL & Agricultural Drones
R4320 350KV is a professional-grade brushless motor engineered for VTOL (Vertical Take-Off and Landing) and crop duster drones. With a robust heavy-duty design, IP67 water & dust resistance, and wide voltage compatibility, it delivers reliable performance in harsh agricultural and industrial operating environments.
Key Features
High Efficiency: Up to 90% motor efficiency, reducing energy loss and extending flight time for long-range agricultural missions.
Wide Voltage Compatibility: Supports 6S~12S LiPo batteries, flexible for various heavy-lift drone configurations.
IP67 Protection: Waterproof and dustproof rating, ideal for outdoor agricultural operations and resistant to rain, dust, and debris.
Dynamic Balanced Rotor: Precision dynamic balancing ensures minimal vibration and stable flight control, critical for precise VTOL maneuvers and stable crop spraying.
High Power Output: Max continuous power of 1459W (8S) and 50A max continuous current, providing strong thrust for heavy-lift VTOL and agricultural drone tasks.
Heavy Duty Design: Built for long-term heavy-load operations, ensuring durability and reliability in demanding conditions.
Performance Highlights
Tested under 32V with HQ1309-3R propeller:
Delivers a maximum thrust of 5463g at 100% throttle, with a peak power of 1459W.
Maintains high efficiency across throttle ranges, with optimal efficiency of 8.98g/W at 20% throttle for extended flight endurance.
Operates at a stable 40°C under full load, ensuring excellent thermal performance during prolonged operations.
Recommended Setup
ESC: 8S 100A Electronic Speed Controller (matched for optimal power delivery)
Propeller: HQ1309-3R Propeller (tested for best thrust and efficiency in VTOL and agricultural applications)
Core Specifications
| Parameter | Value |
|---|
| Brand | XMJ |
| Model | R4320 350KV |
| Net Weight | 306g |
| Motor Dimension (Diameter * Length) | 51 * 67.4mm |
| Shaft Diameter of Propeller Adapter | M6 |
| Propeller Mounting Holes | / |
| Motor Mounting Holes | Ø30 4-M4 |
| Configuration (Slots/Poles) | 12N14P |
| Rated Voltage | 6-12S |
| Supported Lipo Battery Cells | 6S~12S LiPo |
| Rated Current | 0.55A |
| Max Continuous Current | 50A |
| Max Continuous Power | 1459W/8S |
| No-load Current (@20V) | 1.1A @20V |
| Motor Efficiency | 90% |
| Internal Resistance | 54.39mΩ |
| Motor Cable Length | 16AWG 600mm |
| Dynamic Balanced Rotor | Yes |
| Heavy Duty Design | Yes |
| Water & Dust Proof | Yes (IP67) |
| Recommended ESC | 8S 100A |
| Recommended Propeller | HQ1309-3R Propeller |
| Application | For VTOL & Crop Duster Drones |
Performance Test Report (Test Condition: 32V, HQ1309-3R Propeller)
| Throttle | Amps (A) | Watts (W) | Thrust (g) | RPM | Efficiency (g/W) | Operating Temp (°C) |
|---|
| 20% | 1.60 | 51.20 | 460 | 3261 | 8.98 | 40 |
| 30% | 3.60 | 115.20 | 886 | 3867 | 7.69 | 40 |
| 40% | 5.30 | 169.60 | 1216 | 4163 | 7.17 | 40 |
| 50% | 7.10 | 227.20 | 1587 | 5116 | 6.99 | 40 |
| 60% | 11.60 | 371.20 | 2312 | 6056 | 6.23 | 40 |
| 70% | 15.90 | 508.80 | 2896 | 6911 | 5.69 | 40 |
| 80% | 22.90 | 732.80 | 3716 | 7863 | 5.07 | 40 |
| 90% | 31.80 | 1017.60 | 4597 | 8635 | 4.52 | 40 |
| 100% | 45.60 | 1459.20 | 5463 | 9436 | 3.74 | 40 |