Transonic speed refers to the range of speeds that are close to the speed of sound, typically between Mach 0.8 and Mach 1.2. At these speeds, an aircraft or object experiences a mix of subsonic and supersonic airflow, leading to unique aerodynamic challenges. During transonic flight, shock waves can form, affecting lift and drag. This phenomenon is crucial for aircraft design, as engineers must consider how to manage these effects to ensure stability and performance. Notable examples of transonic aircraft include the Boeing 747 and the Concorde.