What is the definition of accelerate start/stop distance?

The definition of accelerate start/stop distance specifically refers to the distance required for an aircraft to reach full power, experience an engine failure, and then stop before reaching the point of rotation (VR). This is a critical parameter in aviation safety and performance analysis, especially in relation to runway length and aircraft weight.

This distance is vital for pilots and flight operations as it illustrates the limits of aircraft performance during critical phases of takeoff, particularly in scenarios where an unexpected loss of engine power occurs. Such understanding is essential for ensuring that an aircraft can safely abort a takeoff if necessary and still come to a complete stop within the available runway.

In practice, this distance takes into account not only the acceleration phase but also the deceleration needed in case of an emergency, making it a key factor when evaluating the suitability of a runway for a particular flight operation. This is why the option accurately encapsulates the essence of accelerate start/stop distance.