First fold your paper in half like a hotdog

Then fold the top 2 corners so that they line up with the centre cris

When your done it will look something like this

After fold it down like this

Make chore that the middle line lines up like this

Just like the beginning fold the top 2 corners like this

The 2 folds that you just made will keep on opening up,so fold it like this so they won't open up

Turn your air plane up side down and fold it in half

Fold it like this and do the same on the other side as we'll

You will know that you are done if it looks like this