Fold the paper up in half along the center crease, then unfold and lay it down flat as shown in the second photograph.

Without creasing the airfoils, reverse the angling of the fourth folds and pull them inward as shown in the third and fourth photographs. Pull the paper inward and reverse the airfoil folds as well and crease them, as shown in the fourth photograph.

Once you have folded the outer portions of the wing back over the central portion of the paper, fold along the center crease as shown in the fifth photograph. With the paper folded like this, pull the other wing portions outward on each side until the forward side is limited by the airfoil folds and the rear edge by the fold of the paper. Repeat on the other side. This process is shown in the sixth to eighth photographs.

Once you have made these folds, you must again reverse the placement of the airfoil folds, as shown in the ninth through twelfth photographs.