Tricopter Flipping Backward on Takeoff (Pixhawk CUAV X7)

Hi everyone,

I’m having trouble getting my tricopter to take off—it keeps trying to flip backward as soon as I arm and throttle up. I’m using a Pixhawk CUAV X7 flight controller.

. The strange behavior only occurs during takeoff otherwise, the drone appears stable.

Has anyone encountered a similar issue or know what might be causing this?

Thanks in advance for any help!

Please upload a log to logs.px4.io and link it here.