As FPV drones continue expanding into logistics delivery, long-range reconnaissance, counter-drone missions, industrial inspection, and amphibious air-ground systems, the traditional 5-inch and 7-inch drone power systems are no longer sufficient. Larger 10-inch to 13-inch platforms require significantly greater thrust, torque, efficiency, and payload capability.
When selecting a motor for a large FPV drone, the key factor is not simply power output, but finding the right balance between propeller size, flight endurance, payload capacity, and system weight. For most manufacturers and UAV developers, the motor selection path naturally progresses from 3115 → 4715 → 5315, corresponding to increasing aircraft size and mission requirements.
The 10-inch platform has become one of the most popular UAV sizes because it offers an excellent compromise between endurance and maneuverability.
Typical applications include:
Long-range FPV flights
Logistics delivery drones
Inspection UAVs
Mapping drones
Counter-UAS interceptors
Amphibious UAV systems
Most 10-inch drones operate between 2kg and 5kg takeoff weight, requiring motors capable of producing strong torque while maintaining efficient cruise performance.
The 3115 motor features a 31mm stator diameter and 15mm stator height, providing substantially higher torque than traditional 2807 or 2812 motors. Industry examples commonly pair 3115 motors with 10-inch propellers and long-range FPV platforms.
Key Advantages
Excellent torque for large propellers
High propulsion efficiency
Lower motor temperatures
Strong payload capability
Stable low-throttle performance
For delivery drones and industrial UAVs, the 3115 motor provides the lifting power necessary to carry cameras, communication equipment, sensors, or small cargo while still maintaining practical flight times. Community discussions around 10-inch delivery drones frequently identify 3115 motors as a preferred solution for balancing carrying capacity and endurance.
The 11-inch category has gained popularity because it offers a noticeable increase in thrust and efficiency without requiring a complete transition to heavy industrial propulsion systems.
Compared with 10-inch drones, an 11-inch platform typically provides:
Longer endurance
Higher payload capacity
Better wind resistance
Improved hovering efficiency
These characteristics make it particularly attractive for:
BVLOS operations
Surveillance missions
Tactical FPV applications
Emergency response drones
Medium-duty logistics UAVs
Many manufacturers continue using 3115 motors for 11-inch platforms because the stator volume is large enough to drive 11-inch propellers efficiently while avoiding the extra weight associated with larger industrial motors. Some 3115 motors are specifically marketed for 10-inch and 11-inch long-range FPV applications.
The result is a highly balanced aircraft capable of:
Carrying heavier payloads
Flying longer distances
Maintaining agile handling
Reducing overall system cost
For most 11-inch FPV, logistics, and anti-drone projects, a high-quality 3115 motor remains the optimal solution.
Once propeller size reaches 12 inches, the demands on the propulsion system increase significantly.
Larger propellers create:
Greater rotational inertia
Higher torque requirements
Increased current demand
Heavier aircraft structures
At this stage, a 3115 motor can still function, but efficiency begins to decline when carrying substantial payloads.
This is where the 4715 motor becomes the superior choice.
With a 47mm stator diameter, the 4715 motor generates significantly more torque than a 3115 motor.
Benefits include:
Suitable for:
Industrial inspection equipment
Thermal imaging systems
LiDAR payloads
Delivery cargo modules
Larger motors distribute heat more effectively during:
Long hovering missions
Heavy-load operations
High-temperature environments
The larger magnetic field and increased torque reserve provide smoother control under demanding flight conditions.
A 4715 motor is particularly suitable for:
Powerline inspection drones
Infrastructure monitoring UAVs
Security surveillance systems
Agricultural scouting drones
Professional cinematic FPV platforms
For aircraft weighing between 5kg and 8kg, the 4715 motor often represents the most efficient balance between power and endurance.
The 13-inch category represents a transition from large FPV drones into industrial heavy-lift UAVs.
These aircraft are commonly used for:
Cargo transportation
Emergency supply delivery
Heavy camera systems
Multi-sensor payloads
Military and security applications
Advanced counter-drone platforms
At this scale, propulsion efficiency depends heavily on motor torque.
The 5315 motor features a massive 53mm stator diameter, providing exceptional low-RPM torque and allowing efficient operation with large propellers.
-Superior Lifting Capability：The larger stator generates significantly more thrust, enabling stable operation with heavy payloads.
-Lower Motor Stress：Instead of forcing a smaller motor to work near its limit, a 5315 motor operates more comfortably under heavy loads.
-Longer Service Life：Lower operating temperatures and reduced stress improve reliability for commercial UAV fleets.
5315 motors are ideal for:
Heavy-lift FPV drones
Industrial cargo UAVs
Large logistics drones
Counter-UAS interceptors
Long-endurance surveillance platforms
High-end cinema drones
For aircraft exceeding 8kg takeoff weight, the 5315 motor becomes one of the most practical and reliable choices.
Rather than selecting a motor solely based on power, UAV designers should match the motor to the intended aircraft size and mission profile.
For 10-inch and 11-inch FPV drones, the 3115 outrunner motor remains the most versatile solution, combining strong torque, excellent efficiency, and reliable payload capability. It is especially suitable for FPV exploration, logistics delivery, counter-drone systems, and amphibious UAV platforms.
As aircraft move into the 12-inch category, the 4715 motor provides the additional torque and thermal performance required for industrial missions. For 13-inch heavy-lift drones, the 5315 motor delivers the thrust reserve and reliability necessary for cargo transport, professional aerial operations, and advanced UAV applications.
For manufacturers such as BG Motor, the progression from 3115 → 4715 → 5315 represents a complete propulsion solution covering nearly every large FPV drone segment currently experiencing rapid growth in the global UAV market.
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