To minimize the length of runway required for takeoff, how should V1 be selected?

Selecting V1 plays a critical role in optimizing the takeoff performance of an aircraft. V1 is the maximum speed in the takeoff descent at which the pilot can decide to continue the takeoff or abort it in the event of an emergency, such as an engine failure. The proper selection of V1 helps ensure that the aircraft can achieve the necessary criteria for safe operation while minimizing the required runway length.

When the accelerate-stop distance is equal to the accelerate-go distance, it indicates that the aircraft can safely stop within the available runway distance if a decision to abort takeoff is made at V1. This means that the distances required for both scenarios are balanced, allowing for safe operations without requiring excessive runway length. If V1 is set too low, it may lead to an unnecessarily long effective runway length needed for takeoff, as the aircraft would begin its transition from a stop to the required takeoff speed before the optimum aerodynamic conditions for takeoff have been reached.

In contrast, if the accelerate-stop distance is greater than the accelerate-go distance, it would imply that the aircraft could stop in a longer distance but might not achieve the critical speed to take off within the same runway distance, potentially leading to longer runway requirements. Therefore, maintaining equality allows