7x11 Drone Propeller

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7x11 Drone Propeller

The 7x11 Composite Plastic Propeller, unlike standard multicopter propellers, is designed for use in aircraft aiming for high forward flight speeds. The number 7 in the product name refers to the diameter of the propeller, and the number 11 refers to the pitch.

A 7-inch diameter corresponds to approximately 177.8 millimeters in metric measurements. The high pitch of 11 inches indicates the theoretical distance the propeller attempts to move forward in one full rotation. Therefore, 7x11 propellers create stronger forward airflow and higher speed potential compared to lower pitch propellers of the same diameter.

Due to its high pitch, this product is not a common propeller option for classic FPV drones, DJI agricultural drones, or standard industrial multicopters. It is more commonly preferred in fixed-wing RC aircraft, custom-designed high-speed UAV systems, and pusher-configured aircraft.

Which Drones Use 7x11 Propellers?
7x11 propellers are used in advanced flight platforms rather than common multi-rotor drone systems. Because of their low hovering efficiency, they are generally not preferred in classic quadcopter applications.

Their main areas of use include:

High-speed fixed-wing electric RC aircraft
Custom-built speed-oriented UAV projects
Pusher aircraft with pusher motor configurations
Experimental high-pitch multirotor systems
Fast reconnaissance and observation aircraft
Racing and performance-oriented fixed-wing platforms
Electric model aircraft projects
Custom-designed unmanned aerial vehicles
Although they can be used in experimental multicopter projects, the high pitch can place a significant load on the motor, ESC, and battery. Therefore, they should not be used in standard drones without professional calculations and testing.

Technical Specifications
Product name: 7x11 Drone and RC Aircraft Propeller
Propeller diameter: 7 inches
Diameter measurement: Approximately 177.8 mm
Pitch: 11 inches
Number of blades: Usually 2 blades
Material: Nylon or glass fiber reinforced composite plastic
Approximate weight: 10 g
Shaft hole: Approximately 6.35 mm
Adapter compatibility: Adapter rings for 3–7 mm motor shafts
Hub thickness: Approximately 9 mm
Rotation direction: CW and CCW options
Motor class: 28xx–35xx BLDC motors
Motor KV range: Approximately 700–1200 KV
Battery compatibility: Usually 4S–6S LiPo systems
Usage type: High-speed forward flight
Technical values ​​may vary depending on the brand and production series. Center hole measurement, hub thickness and rotation direction should be checked before purchasing.

Advantages of 7x11 Propellers
The most important advantage of a 7x11 propeller is its high forward flight speed. The high pitch helps the propeller direct more air backward with each rotation.

Main advantages:

High forward flight speed
Strong airflow
Efficient cruising in fixed-wing applications
Stable wing structure at high speeds
Suitability for speed-oriented UAV projects
Suitable for use in pusher systems
Mounting on different motor shafts with adapter rings
CW and CCW rotation direction options
Glass fiber reinforced composite plastic structure helps maintain the propeller shape at high rotational speeds. The rigid structure, when properly balanced, supports reduced vibration and more controlled transfer of motor power.

Disadvantages and Considerations
Propellers with high pitch values ​​can draw more current from the motors. This can cause the motor and ESC temperatures to rise, the battery to drain faster, and flight time to shorten.

7x11 Propeller:

May offer low efficiency in hovering flights.
May not be suitable for standard FPV multicopters.
May create high load on the motor and ESC.
May cause overheating if the wrong motor is selected.
May make control difficult at low speeds.
May require a more powerful battery and ESC.
Compatible Motor and Power System
7x11 propellers are mostly used with high-torque BLDC motors in the 28xx–35xx class. Compatible combinations can be created with approximately 700–1200 KV motors and 4S–6S LiPo battery systems.

The following values ​​should be checked when making the exact motor selection:

Motor manufacturer's propeller recommendation
Motor KV value
Maximum motor current
ESC current capacity
Number of battery cells
Total takeoff weight of the aircraft
Motor use in towing or pushing position
CW and CCW rotation direction
Gap between propeller and fuselage