Before doing anything else on this step, be sure to unfold the landing gear folds you made in the previous step to allow the paper to sit flush with itself, as shown in the first photograph.

With the landing gear folds out of the way, use your ruler to find the spot along the trailing edge of the paper which is 0.875 inches from the center crease and make a mark. At the nose, find the spot which is 0.75 inches above the center crease along the leading edge and make another mark. Along the center crease, measure 1.25 inches from the rear edges of the airfoil folds.

With these markings made, connect the first to marks with a crease. This will make one of the wings. Turn the paper over and repeat the fold, matching it to the one you have just made for symmetry. After doing this, unfold.

Connect the first and third marks with another fold. This will create the tail. After making this crease, unfold the paper and allow it to lie as flat as possible. Reverse the creases to make the tail; it should appear as it does in the tenth photograph.