Start with a square sheet of paper.
Fold the paper in half lengthwise, then unfold.
Fold both top corners down to the center crease.
Fold the resulting top edge down to the center crease.
Fold the paper in half along the center crease.
Fold the nose down slightly to align with the bottom edge.
Fold the top wings down so they match the folded bottom line.
Fold the wings down again to sharpen the profile.
Make small adjustments to the wings for symmetry.