SunnySky V4004 KV300 Brushless Motors
The SunnySky V4004 KV300 is a high-efficiency, low-KV brushless motor engineered for long-endurance multirotor and heavy-lift UAV applications. Its 40mm stator diameter and 300KV rating deliver high torque at low RPMs, optimizing flight time and stability for larger drones.
Features
- 40mm stator diameter (V4004) with a low 300KV rating for high torque and long flight endurance.
- Patented stepped and knurled shaft design prevents loosening and ensures stable power output.
- Equipped with high-precision Japanese EZO bearings for quiet, smooth, and reliable operation.
- Dynamically balanced to within 3% performance variance for consistent, precise thrust across all motors.
- Hollow-cut motor cap reduces weight, maximizing the thrust-to-weight ratio for improved efficiency.
Out of stock
The SunnySky V4004 series represents a specialized line of brushless motors designed from the ground up for demanding, long-flight-time multirotor platforms. The core engineering focuses on achieving peak efficiency at lower rotational speeds, generating substantial torque ideal for lifting heavier payloads or spinning larger propellers. This makes the V4004 KV300 a cornerstone for professional cinematography drones, mapping UAVs, and other endurance-focused aircraft.
Structural integrity is paramount. The motor employs a patented stepped and knurled shaft design that mechanically locks the bell to the shaft, virtually eliminating the risk of loosening during flight—a critical failure point in high-vibration environments. Combined with the use of premium Japanese EZO bearings, the motor ensures smooth rotation with minimal radial and axial play, contributing to stable flight characteristics and extended operational life. Each unit undergoes rigorous dynamic balancing and performance matching, guaranteeing that a set of motors will perform within a tight 3% tolerance.
Additional Information
| Weight | 0.152 kg |
|---|---|
| Dimensions | 12 × 9 × 5 cm |
