What is an accelerate-go distance, and when is it used?

• A. The distance to reach cruising speed.
• B. The distance required to accelerate to V1 and then stop if taking off is aborted; used for abort-and-stop scenarios after acceleration.
• C. The distance to reach landing speed.
• D. The distance after takeoff to accelerate to cruise.

Answer: (B)

Takeoff performance figures are defined for different abort-or-continue scenarios, so pilots know how much runway is required in each case. The accelerate-go distance specifically refers to the runway length needed to accelerate to the decision speed (V1) and then come to a stop if the takeoff is aborted after reaching that point. In other words, it is the distance for an abort-and-stop scenario after acceleration, helping planners ensure you can safely halt within the runway if you decide not to continue the takeoff after accelerating.

The other options describe distances tied to other phases or speeds—reaching cruising speed, reaching landing speed, or the distance after liftoff to climb to cruise—which are not the scenarios this distance is meant to cover.