What is the minimum takeoff spacing between aircraft in an instrument trail departure?

The minimum takeoff spacing between aircraft in an instrument trail departure is established as no less than 20 seconds. This spacing is crucial to ensure adequate separation between the aircraft considering wake turbulence and other factors that could affect safety during takeoff and initial climb.

In instrument flight rules (IFR) conditions, the risk of a following aircraft encountering wake turbulence from the preceding aircraft increases, especially at low altitudes during takeoff. The 20-second interval provides sufficient time for separation, allowing the trailing aircraft to avoid the wake turbulence produced by the preceding aircraft as they climb.

Understanding this spacing requirement is essential for formation flying and ensuring safety in crowded airspace. It is important to adhere to these regulations not only for individual safety but also for maintaining the overall efficiency and predictability of traffic in busy terminal environments.