Q: What propellers and batteries are compatible with the EMAX ECO II 3115 motor?

A: The ECO II 3115 motor supports 9–12 inch propellers and offers multiple KV options: 400KV / 500KV: Best with 10–12S LiPo; 640KV: Ideal for 6–8S LiPo; 900KV: Suitable for 4–6S LiPo. Perfect for long-range, heavy-lift, and cinematic drone setups.

Q: How does the EMAX ECO II 3115 compare to premium motors like T-Motor or iFlight?

A: While more affordable, the ECO II 3115 still delivers impressive thrust, efficiency, and durability. With N52SH arc magnets and NSK bearings, it’s a reliable high-performance option and a cost-effective alternative to premium brands.

Q: What types of FPV drones is the EMAX ECO II 3115 motor suitable for?

A: It’s ideal for CineLifters, long-range cruisers, and heavy-lift drones, especially those using 9–12" propellers. Great for aerial cinematography, payload flying, and endurance missions.

emax ecoii3115 400kv 500kv 640kv 800kv 900kv motor for fpv racing drone

Emax ECOII 3115 400KV / 500KV / 640KV / 800KV / 900KV Brushless Motor for FPV Racing Drone

About EMAX ECO II 3115 Motor:

The EMAX ECO II 3115 Motor delivers reliable, high-performance power with KV options (400KV, 500KV, 640KV, 900KV) to suit diverse drone setups. Its durable design and advanced cooling ensure efficiency and longevity, making it a versatile choice for upgrades or new builds.

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$ 32.99 ~~$39.90~~

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400KV

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Description

FAQ

● Large stator size for powerful thrust: Ideal for 9–12" props and heavy-lift builds.

● Multiple KV options: 400KV to 900KV, tailored for various flight needs.

● High efficiency with premium magnets: Faster response and smoother control.

● Durable and crash-resistant: Reinforced bell design and precision bearings.

● Excellent value: Performance close to premium motors at a lower price.

Powerful Thrust for Heavy-Lift Applications

The 3115 stator size (31mm diameter x 15mm height) is engineered for drones carrying heavy payloads like cinema cameras or large batteries. It pairs perfectly with 9–12" props, delivering efficient lift and stable flight for long-range or cinematic missions.

Versatile KV Range for Different Setups

400KV / 500KV: Suited for 10–12S LiPo setups, maximizing efficiency in endurance builds.

640KV: A balanced choice for 6–8S builds, ideal for both range and agility.

800KV / 900KV: Best for 4–6S builds where agility and responsiveness matter.

This range makes the ECO II 3115 suitable for everything from long-range explorers to freestyle cinematics.

High-Efficiency Magnetic Design

Equipped with N52SH arc magnets, this motor offers stronger magnetic force and quicker response than typical N48 designs. This means faster throttle reactions, greater torque, and better flight precision.

Durable Construction for Real-World Flying

The rounded bell shape helps deflect impact forces, reducing damage from crashes. It also features NSK precision bearings, known for their reliability and smooth operation under load.

Precision Manufacturing for Flight Stability

Emax is known for tight tolerances and balanced rotors. This results in minimal vibration, reduced noise, and consistent performance — key for smooth cinematic footage.

Specifications

emax ecoii3115 brushless motor for fpv racing drone size

Data Test

400KV

Recommended Propeller: 10"

Idle Current (10V): 0.6A

Internal Resistance: 130

Voltage Range: 10-12S

Max Power: 1970W

Peak Current: 41A

emax ecoii3115 brushless motor for fpv racing drone para

500KV

Recommended Propeller: 10"

Idle Current (10V): 0.8A

Internal Resistance: 95

Voltage Range: 8-10S

Max Power: 1960W

Peak Current: 49A

emax ecoii3115 motor for fpv racing drone para

640KV

Recommended Propeller: 10"

Idle Current (10V): 1.2A

Internal Resistance: 66m

Voltage Range: 6-8S

Max Power: 2016W

Peak Current: 63A

800KV

900KV

Recommended Propeller: 10"

Idle Current (10V): 0.6A

Internal Resistance: 130

Voltage Range: 10-12S

Max Power: 1970W

Peak Current: 41A

emax ecoii3115 brushless motor for fpvng drone para

Recommendations

Reviews (10)

a**********6
Purchased 2 times
Excellent quality and fast shipping. Highly recommended!
Model：900KV Additional reviews after 3 days
Fast shipping and excellent product.
a**********6
Purchased 2 times
Excellent quality and fast shipping. Highly recommended!

Model：900KV
t******v

System default five-star praise
Model：400KV Additional reviews after 24 days
nice motor. very powerfull for 10 inch longrange.

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