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Quadplane Severe Vibration

My Quadplane keeps vibrates severely when its at 20% throttle. I am using Pixhawk 4 with Quad enabled. I have enclosed the video and log file of the vibration.

Perhaps someone could give me some insights on how to solve this issue.

Log File:

Just needs a tune, turn down your gains.

Will surely try it out! thanks for your response:)

Servers by jDrones