The Orstich wing structure is a conceptual aircraft wing design invented by German aeronautical engineer Otto Orst in the 1920s. It uses curved plates called "Orst plates" arranged in a staggered formation to create low-pressure areas and generate lift. Small airfoils called "Orst flaps" on the trailing edge help increase lift and control airflow.
The design is potentially highly fuel-efficient but very complex, and its practicality for aircraft remains uncertain. It is considered a promising concept in aircraft design.