Trouble with Tricopter build

Hardware Pixhawk family
1

Not sure if this is the right spot to post this.

I am having trouble getting my new tricopter to take off. When I throttle up for takeoff, the tricopter pitches back to such an extent that I need to move my pitch control stick all the way forward to stop it from flipping back.

I am using a Pixhawk 4 Mini running the stable PixhawkMini version of Copter from here: PH4-mini

I have completed the initial setup and calibration steps in mission planner with no errors.

Here is a screenshot of the horizon from Mission Planner.

10%20pm

As you can see, it is reading (mostly) level.

How would I go about debugging this?

Let me know if you need any more info about my setup.

Cheers.

2

Please don’t double post.

3

Sorry, I tried to delete this one but it said I don’t have permission to delete stuff.

I have flagged it to the moderators for deletion.