DarwinFPV 4320 Brushless Motor

Summary  The DarwinFPV 3520 motor is ideally suited for 13-15 inch X-Class FPV racing drones, as well as for aerial photography drones or fixed-wing aircrafts requiring heavy payloads. Equipped with Japanese NSK bearings, N52H arc-shaped magnets, and multi-strand winding for heightened efficiency, its larger stator size delivers incredible thrust, high responsiveness, and exceptionally smooth flight characteristics. If you're building a larger X-Class FPV racing drone, then this 3520 motor is undoubtedly your top choice! Features 1: Japanese NSK bearings ensure smooth and silent operation with exceptional durability against impacts. 2: Customized N52H high-temperature resistant arc-shaped magnets provide stronger magnetic force and increased pulling power. 3: The motor employs a multi-strand winding method, achieving higher slot fill factor, resulting in a 4% longer flight time compared to single-strand motors. 4: The addition of a dual-security fixation with both circlips and counters