
Now, I'm going to write about horizontal deviation. When your paper airplane turns right or left, do as the diagram to the left indicates. The plane will turn towards the direction where you will turn the body. The plane of the diagram will turn right. So, if your paper airplane turns right, turn the body towards left and vice versa. I have also found out that if you bent one wing towards up (see "Adjust your paper airplane - part 1"), the paper airplane will turn towards that wing's direction.
That's it for now. If there is a point that I didn't cover, don't hesitate to leave a comment.

Does your paper airplane have flying problems? There are some ways to solve the problem. Here, I'm going to write about the vertical deviation.
Problem: The airplane turns upwards. To fix this, bend both wings towards down, as indicated in dig. 1.
Problem: The airplane turns downwards. To fix this, bend both wings towards up, as indicated in dig. 2.
I have also figured out that folding both wings towards up so that the airplane has a "Y" shape works quite well.
In the next part of this mini article, I'm going to write about horizontal deviation.