@atgxtg thanks

I see two major problems:

Your first major problem is that you center of lift is ahead of your center of mass, which makes the plane unstable and problem to going into a uncontrolled climb.

To fix: Put more weight upfront (say by adding fuel) to shift the center of weight ahead of the center of lift, and or move/add more wing further back to shift the center of lift.

Your second problem is that the plane doesn't have enough lift for the tail section, which causes the airplane to keep bouncing up and down like a roller coaster.

To fix: Increase the lift for the tail section. You can do this by angling the tail/adjusting it's dihedral to make it more horizontal, or by adding a horizontal tail secotion with stabilizers, or by moving or reshaping the the wings further back.

Fix those two things and it should fly.

Now there are some other things that you might want to adjust. For example ailerons (roll) are more effective near the out edge of the wing,but you don't have to change that.

I don't know what the rotators on the aircraft are supposed to do for it.

Here is a version with more fuel up front, and flatter tail to show you one way to make this fly.

http://www.simpleplanes.com/a/iSVqLW/Smiliingtrios-aircraft

I'll see what I'll do and post it publicly for you.