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Big Motors > AirDrive (Drones/Fixed-wing)
The 3115 900KV brushless motor features a robust outrunner design optimized for heavy-lift drones and industrial UAV applications. Engineered with an oversized stator and high-grade magnets, it delivers exceptional torque efficiency while maintaining precise speed control. The motor's balanced construction and thermal management capabilities make it ideal for 10-inch propellers, agricultural sprayers, and aerial platforms requiring sustained power delivery with 6S-8S LiPo systems.
| Parameter | Specification |
| Motor Type | 3-Phase Sensorless BLDC (Outer Rotor) |
| Stator Size | 31×15mm (D×H) |
| KV Rating | 900 RPM/V ±5% |
| Pole Count | 14N18P (Magnets/Poles) |
| Rated Voltage | 6S-8S LiPo (22.2-29.6V) |
| Max Continuous Power | 1200W @ 29.6V |
| Peak Power | 2000W (60-second burst) |
| Max Thrust | 4.2kg/prop @ 29.6V |
| Phase Resistance | 0.08Ω (±5%) |
| Shaft Diameter | 5mm (Hardened Steel) |
| Weight | 185g (Excluding Wires) |
| Mounting Pattern | M3 (16×19mm / 19×19mm) |
| Connectors | 3.5mm Gold Bullets |
• High-Torque Design: Oversized stator with 0.2mm laminations for reduced eddy losses
• N52H Magnets: High-energy neodymium magnets with 200°C thermal stability
• Precision Balancing: Dynamically balanced rotor (<0.05g vibration)
• Thermal Management: Integrated cooling fins and air channels
• Corrosion Protection: Nickel-plated bell housing with salt-resistant coating
• Dual Ball Bearings: Stainless steel shielded bearings (5×13×4mm)
• Phase Wires: 16AWG high-temp silicone (200°C rated)
Tested with APC 10×4.5 Prop @ 29.6V (8S)
| Thrust | RPM | Current | Efficiency | Flight Time* |
| 2.8kg | 6,200 | 28A | 84% | 25min |
| 4.2kg | 8,500 | 42A | 80% | 18min |
• 10-inch agricultural spray drones (16L capacity)
• Cinema camera platforms (RED Komodo payloads)
• Industrial inspection UAVs
• Search-and-rescue equipment carriers
• Pesticide spraying systems
• Seed dispersal mechanisms
• Crop monitoring sensor platforms
• Fertilizer spreader drives
• Robotic arm joint actuators
• Conveyor belt drives
• Pump motor replacements
• Automated guided vehicle (AGV) propulsion
• Power line inspection drones
• Solar panel cleaning UAVs
• Wind turbine inspection platforms
• Pipeline monitoring systems
• Operating Temp: -20°C to +80°C
• Thermal Limit: 105°C (automatic power derating)
• IP Rating: IP54 (dust/splash resistant)
• Altitude Performance: Maintains power up to 5,000m ASL
• Vibration Tolerance: 10G @ 20-2000Hz
• Chemical Resistance: Withstands pesticides, fertilizers, and fuels
• Storage Conditions: -30℃ ~ +60℃, <80% RH
• Service Life: 1,000+ flight hours (properly maintained)
