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Big Motors > AirDrive (Drones/Fixed-wing)
The D3508 380KV brushless motor delivers high-torque, efficient performance for heavy-lift multi-rotor drones and industrial UAV platforms. Engineered with a robust external rotor design and precision-balanced components, it provides exceptional thrust-to-weight ratio and thermal stability for payloads exceeding 3kg. The motor's optimized electromagnetic circuit ensures smooth operation across wide throttle ranges, making it ideal for aerial photography, agricultural spraying, and surveying applications requiring extended flight endurance.
| Parameter | Specification |
| Motor Type | 3-Phase Sensorless BLDC (External Rotor) |
| Protection Rating | IP54 (Dust & Splash Protected) |
| Rated Voltage | 5-6S LiPo (14.8V–22.2V) |
| Continuous Power | 200W @ 22.2V |
| Max Torque | 1.9Nm (Peak) / 1.2Nm (Continuous) |
| Speed Range | 1,500–40,000 RPM (ESC Adjustable) |
| KV Rating | 380-700 RPM/V |
| Phase Resistance | 0.205Ω (Phase-to-Phase) |
| Shaft Diameter | 4mm (Hardened Steel) |
| Weight | 90g |
| Mounting | 25×25mm / M3 Threads (4-point) |
| Dimensions | Ø42mm × 27mm (Housing Diameter × Height) |
• Heavy-Lift Optimization: Compatible with 12"-15" propellers for payloads >3kg :cite[5]:cite[7]
• Precision Balancing: <0.02g·mm dynamic imbalance minimizes vibration for stable footage
• High-Efficiency Windings: 18AWG oxygen-free copper with 600mm cable length :cite[4]
• Dual-Bearing System: Stainless steel + ceramic hybrid bearings (model: 685ZZ)
• Thermal Management: Aluminum housing dissipates heat at 85% continuous load
| Propeller | Throttle | Thrust | Current | Efficiency |
| APC 12×3.8" | 100% | 1,580g | 10.5A | 6.78 g/W |
| APC 14×4.7" | 85% | 1,123g | 8.6A | 7.06 g/W |
| DJI 15×5.5" | 75% | 1,104g | 7.5A | 7.96 g/W :cite[1] |
• Aerial cinematography with mirrorless/DSLR cameras :cite[7]
• Agricultural spraying UAVs (payload capacity: 3-5kg)
• Industrial inspection drones with LiDAR/thermal sensors
• Mapping/Surveying platforms (>25min flight time) :cite[8]
• Search and rescue X8 configurations
• Cargo delivery VTOL conversions
• Crop monitoring multispectral drones
• Weather balloon payload recovery systems
• Coastal surveillance maritime drones
• Continuous Operation: ≤75°C @ 25°C ambient (30-sec burst to 95°C)
• Cooling Requirements: Passive cooling sufficient; 3m/s airflow optimal
• Thermal Protection: Auto-shutdown at 120°C winding temperature
• Storage Conditions: -20°C to +70°C, <80% RH
