A Curtiss JN-4 (Jenny) biplane on a training flight during World War I | Date 1918 | Source – family photo | Author: George Johnson, Aviation Section, US Army Signal Corps – Wikipedia Reasons ...

To a layman, the Inverted Jenny is just a 24-cent stamp, red with a blue picture of an old-fashioned biplane — but oops! The plane is upside down. To a pilot it pictures an ancient Curtiss JN-4 ...