# 2.13  Emergency Stop Propellers During Flight

Model: lite-640t · Manual v1.0.2
Canonical: https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight
Source: https://drive.google.com/file/d/1yQTDKasKxbvfVdANOx9bmlPYml-2dkCE/view
Updated: 2026-10-17

EVO Lite 640T Enterprise · SE V2 controller

During flight, if the aircraft's motors experience power damage or failure (such as damaged or missing propeller blades, motor failure) resulting in the inability to control the aircraft normally, the emergency propeller stop function can be activated. Simultaneously, push the dual joysticks on the RC inward or outward to force the propeller blades to stop rotating, allowing the aircraft to free-fall for a forced landing. This helps reduce potential damage to property and injuries to ground personnel caused by aircraft malfunctions.

[PDF page 41, block 3](https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight#p41-b3)

In the event of a failure, users should attempt to maneuver the joystick to move the aircraft away from crowds or buildings, decrease the aircraft's altitude and horizontal speed, and then execute the emergency propeller stop function. For details about how to enable this function, please refer to “6.5.7 More” in chapter 6.

[PDF page 41, block 4](https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight#p41-b4)

## Important

[PDF page 41, block 5](https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight#p41-b5)

If the propellers are stopped when the aircraft has a certain initial velocity, the aircraft will follow a parabolic trajectory during free fall. Do not stop the propellers in this unpredictable scenario.

[PDF page 41, block 6](https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight#p41-b6)

After completing the forced landing, please contact Autel Robotics promptly for inspection of the power system.

[PDF page 41, block 7](https://shop.skyflow.ca/learn/autel/evo-lite-enterprise/manuals/evo-lite-640t-v1-0-2/2-13-emergency-stop-propellers-during-flight#p41-b7)