Check your centers, as in CoM, CoL and CoT. Press the SPACE bar or whatever serves that purpose on your machine to bring them up.

I'm guessing that it goes nose up and starts flipping nose over tail.

There are at least two things wrong.
The CoL (the blue line) is in front of the CoM (the red line).
Try making the main wing smaller, this will make the CoL move toward the back of the plane.
The CoT (yellow line) is too low on the fuselage.
This will force the nose of the aircraft upwards under power.
Try using less power on take off, just enough to get off the ground usually works.
When you are airborne you will need to trim for level flight at full power.

As usual, my advice may be WRONG, but that is all it is, advice. Use at your own risk.
If it is wrong I'm sure someone will say so. :P