What is the transonic range of speeds?

The transonic range of speeds is typically defined as the range that includes speeds approaching and slightly exceeding the speed of sound, which is approximately Mach 1. The correct range for transonic speeds is often considered to be approximately Mach 0.75 to Mach 1.20. This range is significant because within this speed domain, airflow around an aircraft begins to experience compressibility effects, leading to varied aerodynamic behavior that can impact performance and stability.

In the transonic range, aircraft experience a mix of subsonic and supersonic airflow, particularly over different parts of their structure. This can lead to phenomena such as shock waves forming at certain points, affecting drag and lift characteristics significantly. Understanding this range is crucial for flight engineers, as it influences design considerations, performance calculations, and operational strategies.

The other options listed do not accurately capture the commonly accepted definition of transonic speeds, making them less suitable for this question. Therefore, the choice that specifies Mach 0.75 to 1.20 aligns with the standard understanding of transonic flight characteristics.