The Story
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
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
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
