1. They give a better performance, with less sweepback, at high and low speeds.

2. Sweepback configuration is beneficial to strengthen the stream-wise vortexes, which intensify the mixing effect accordingly.

3. Program and unsteady aerodynamic work caused by oscillation of sweepback supersonic plate cascade were provided as an example of its application.

4. Both theoretical and experimental analyses are performed to investigate the limit cycle flutter bifurcation of a sweepback wing with an external store in the tip of the wing.

5. The result shows that the leading edge shock wave sweepback could reduce loss obviously.