To resolve the issue with your E88 drone not flying properly and crashing mid-air, follow these thorough troubleshooting steps:

1. Check Battery Levels

Ensure that your drone's battery is fully charged. Insufficient power can cause it to behave erratically or lose control during flight.

2. Inspect Propellers and Motors

Examine the propellers for any damage or obstructions. Dull or broken propellers can lead to unstable flight. Additionally, ensure that the motors are functioning correctly and not obstructed by debris.

3. Calibration of Gyroscope

Calibrating the gyroscope is crucial for stable flight. To do this, place the drone on a flat surface and follow the steps in the user manual for recalibration. This typically involves holding a specific button combination on the remote while powering on the drone.

4. Firmware Update

Check if your drone requires a firmware update. Software issues can affect flight behavior. Update the firmware through the manufacturer's app or website.

5. Check for Interferences

Ensure that there are no electronic devices nearby that could interfere with the drone's signals, such as Wi-Fi routers or cell phones. Additionally, fly your drone in an open area to avoid signal loss.

6. Binding Drone and Controller

Ensure the drone is properly bound to the remote control. Turn both devices on, and follow the binding process outlined in the manual. This often requires moving the sticks in a certain way.

7. Review User Feedback and Solutions

Look through forums and online resources for similar issues encountered by other users. For example, users have reported cases where their drones unexpectedly disarmed mid-flight, suggesting a potential electrical issue - learn more - learn more.

8. Replace Faulty Parts

If the above steps don’t resolve the issue, consider inspecting internal components, such as the flight controller or motors, for damage. Replacement may be necessary if they are malfunctioning.

These steps should help identify and possibly resolve the issue with your E88 drone. It’s advisable to proceed methodically and check each point carefully. If problems persist, contacting customer support may be the next best step.