EMAX ECOII 3115 900KV Brushless Motor — The Ultimate Choice for Long-Range 10-Inch FPV Drones
When it comes to high-performance long-range FPV drones, every gram, every watt, and every revolution counts. At the heart of such drones lies the motor—an uncompromising component that dictates efficiency, thrust, flight time, and responsiveness. The EMAX ECOII 3115 900KV brushless motor is a purpose-built powerhouse engineered to deliver superior torque, cooler operations, and extended endurance for 10-inch propeller platforms on 6S LiPo or Li-ion setups.
Emax ECO II 3115 Optimized for 5–6S power setups and 9–10″ propellers
Emax ECO II 3115 Overview Overview
The Emax ECOII 3115 900KV is designed for high-thrust applications where a balance between agility and payload capacity is required. It’s best suited for long-range FPV drones or cinematic rigs that run on 5S to 6S LiPo setups.
🔹 Key Specifications
| Parameter | Value |
|---|---|
| KV Rating | 900 KV |
| Voltage Range | 5–6 S LiPo |
| Max Current | ~85 A |
| Internal Resistance | ~0.042 Ω |
| Recommended Prop | 9–10 inch |
| Motor Mount | 19 × 19 mm pattern |
| Shaft Diameter | 4 mm |
| Weight | ~106–110 g (with wires) |
The ECOII 3115 900KV motor is optimized to handle the load of 10-inch propellers with high torque at lower RPMs. This enables:
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Improved low-end throttle control for smooth cinematic flights
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Maximized efficiency for long-range and endurance builds
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Better thermal stability under continuous high-load usage
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Lower current draw compared to 1200KV+ motors at equivalent thrust
📊 Performance Metrics
Below are indicative figures using a 10×4.5 inch bi-blade propeller on 6S 4200mAh Li-ion:
| Throttle % | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|
| 25% | 2.1 A | 230 g | 46.2 W | 4.98 |
| 50% | 4.6 A | 560 g | 101.2 W | 5.53 |
| 75% | 8.2 A | 870 g | 180.4 W | 4.82 |
| 100% | 13.5 A | 1220 g | 297 W | 4.10 |
🛠️ Ideal flight throttle range: 45-60% for long-range endurance with balanced thrust and battery usage.
🛡️ Built for Durability
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Thicker bell design resists bending during crash landings
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CNC precision-machined aluminum alloy ensures structural integrity
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NSK bearings offer smoother rotation and longevity
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High-temperature-resistant magnets ensure consistent performance during extended flights
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Multi-strand single wrap winding enables cooler operation under load
Emax ECO II 3115 OverviewNotable Features
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Premium N52SH Arc Magnets: Delivers high torque and RPM stability even under load
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CNC-Machined Bell with Reinforcement Ribs: Increases crash durability
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NSK Bearings: Ensures low-friction, smooth, and quiet operation
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High Temperature Copper Windings: Improves efficiency and longevity under high load
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Top-tier performance for 7–10 inch FPV drones
🔹 Ideal Use Case
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7–10 inch long-range quads
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Cinematic drones carrying GoPros or similar payloads
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Heavy freestyle or endurance builds
🏁 Summary
If you’re building a 6S-powered long-range or cinematic drone and need a reliable 900KV motor, the Emax ECOII 3115 900KV stands out for its mix of power, efficiency, and affordability. It offers stable flight performance and excellent thermal management—ideal for both hobbyists and professionals pushing heavier setups.
Discover the Best Selection of FPV Frames – Shop Now
An FPV drone frame is the backbone of your drone’s build, providing stability and structure for the rest of the components. At the FPV Project, we offer a wide range of FPV drone frames for sale that cater to both beginners and seasoned pilots, providing a foundation for building high-performance racing and freestyle drones. With our selection of FPV frames, you can customize and build your drone to your exact specifications and take your flying skills to the next level.
Learn More About Carbon Fiber!
https://en.wikipedia.org/wiki/Carbon_fiber_reinforced_polymer
- Carbon fiber is a popular material choice for FPV drone frames due to its strength, durability, and lightweight properties.
- Carbon fiber frames provide a higher strength-to-weight ratio than traditional materials, resulting in better performance and maneuverability.
- Carbon fiber composites are resistant to impacts and vibrations, which helps to protect the drone’s sensitive electronics and maintain stability during flight.
- The use of carbon fiber materials in FPV drones also enables faster acceleration, higher speeds, and longer flight times, resulting in a better overall experience for the pilot.
- Carbon fiber is also an excellent thermal conductor, helping to dissipate heat generated by high-powered motors and batteries, thus preventing damage to the drone’s components.
- FPV drone enthusiasts should consider carbon fiber frames when purchasing a new drone or upgrading their existing one to achieve optimal performance and durability.
- Carbon fiber frames are available in a range of sizes and configurations, suitable for different types of drones, including racing, freestyle, and long-range drones.
- When purchasing a carbon fiber frame, consider factors such as weight, stiffness, and compatibility with other components to ensure the best performance for your FPV drone.
- Carbon fiber frames may be more expensive than other frame materials, but their long-lasting durability and performance benefits make them a worthwhile investment for serious FPV drone pilots.
- The FPV Project offers a wide range of carbon fiber frames, suitable for all types of FPV drones, ensuring that enthusiasts have access to the latest technology and the best possible flying experience.
