Requesting help again on another strange crash event. Running Cube with Copter v3.6.9. The vehicle went down shortly after takeoff. Log;
U011_1565103260.bin (1.9 MB)
The vibration graph is unique, I have never seen anything quite like this before:
Midway through the flight, there is a sudden spike in y-vibrations with basically no change to x or z vibrations (which is strange in itself). Even stranger, the y-vibrations persist at the same level for some time until the vehicle finally crashes. What could cause such a spike and keep it there? Because the rangefinder altitude stays constant and there are no x/z spikes, I am fairly certain that the vehicle did not hit anything.
The Gyro P rates also go haywire at the same time:
I am not sure what condition (if any) can cause such clean y-axis failure. Is this a possible bug or IMU fault?
Thank you for the assistance.