What is the takeoff distance required (TODR)?

The takeoff distance required (TODR) is primarily defined as the distance an aircraft needs to accelerate to its rotation speed and includes necessary safety measures to ensure a successful takeoff. This encompasses the entire phase of takeoff, starting from the moment the aircraft begins its acceleration on the runway until it reaches the point where it can safely lift off.

In this definition, safety measures are important because they account for various factors such as weight, wind conditions, runway slope, and other environmental influences that may affect the aircraft’s performance during takeoff. Therefore, the TODR is not just about reaching the required speed but also ensuring that the aircraft can safely take off under all conditions.

The other options do not accurately capture the full scope of what the takeoff distance required entails. While one choice focuses on the distance covered in a single takeoff attempt, that description does not address the essential aspects of achieving rotation speed along with safety considerations necessary for a successful takeoff. Similarly, the minimum distance needed to reach cruising altitude or the total runway length used during takeoff and landing do not reflect the specifics of takeoff distance calculations.