The 30P30N three-segment wing is a common aircraft wing design that is commonly used in high-speed aircraft, such as jets. The central segment usually has a greater thickness and strength and is used to support the entire wing structure and connect the engines. The outer segments are typically thinner and have a large aspect ratio, which helps to reduce drag and improve lift efficiency. This design can provide good lift and drag performance, and is suitable for high-speed flight and long-distance flight. The design of the 30P30N three-stage wing takes into account the needs of the aircraft in different flight phases, providing sufficient lift for take-off and landing, as well as reducing drag and improving fuel efficiency during the cruise phase. This airfoil design is widely used in modern jets and is an optimized, high-performance wing design. The 30P30N has a large amount of experimental data at multiple angles of attack, and its surface pressure coefficient distribution is often used to verify the accuracy of the CFD solver.

The picture shows the comparison of the surface pressure coefficients of 30P30N airfoils at different angles of attack