DRONE MOTOR: 3520(BL-4220D)

This high-torque brushless motor is built for larger mid-size drone platforms that need serious thrust and efficiency. With a 42.5mm diameter and longer 46mm body, the BL-4220D (3520 series) provides extra torque while maintaining a clean, professional look with its blue and silver anodized finish. Key Specifications: Model: 3520 (BL-4220D) KV Rating: 900KV – Optimized for high torque and smooth power delivery Motor Dimensions: 42.5mm diameter × 46mm length Shaft Diameter: 5mm – Secure fit for larger prop adapters Recommended Propellers: 12-14 inch Voltage Range: 4S – 6S LiPo Drone Frame Compatibility: 500mm to 600mm frames Why This Motor is a Great Choice for Drones The BL-4220D 900KV excels on 500-600mm frames where extra power and payload capacity are required. Its lower KV rating delivers strong torque with 12-14 inch props, making it ideal for carrying heavier cameras, gimbals, or extended flight batteries while keeping current draw manageable. High Torque Performance: Excellent for stable hovering, heavy-lift applications, and responsive control even under load. Efficient Power Delivery: Runs cool on 4S-6S setups, supporting longer flight times compared to higher KV motors on the same frame size. Robust & Reliable: Reinforced construction and quality bearings handle demanding flights and occasional hard impacts. Smooth & Quiet Operation: Low vibration design helps maintain clear video footage and reduces wear on the airframe. Perfect for cinematic drones, heavy-lift photography rigs, long-range FPV cruisers, or any 500-600mm build that needs reliable lifting power without sacrificing efficiency. Ready to upgrade your drone? The BL-4220D gives you the muscle you need for bigger props and bigger missions while staying efficient and dependable in the air. Models 3520(BL-4220D) KV 900 Motor diameter (mm) 42.5 Motor length (mm) 46 Drone frame sizes (mm) 500-600 Propeller size (inch) 12-14 Voltage 4S–6S LiPo Shaft diameter 5mm