How long does number 2 wait after number 1 has released brakes during an interval takeoff?

In an interval takeoff, number 2 waits for a specific duration after number 1 releases the brakes before beginning their own takeoff roll. This delay is designed to ensure a safe separation distance between the aircraft during the critical phases of departure.

The correct wait time for number 2 is 6 seconds after number 1 has released brakes. This time frame allows for proper separation and prevents any risks associated with closely spaced departures, such as the potential for wake turbulence or insufficient spacing on the runway. The 6-second interval has been established through procedural training and is considered optimal for maintaining safety and operational efficiency.

Understanding this timing is crucial for pilots participating in formation flying or coordinated departures, as it helps them to execute their maneuvers safely and effectively while adhering to standard operating procedures.