What does V1 represent in aviation?

In aviation, V1 is a critical speed during the takeoff phase. It is defined as the maximum speed at which a decision can still be made to abort the takeoff. If the aircraft reaches this speed and an issue arises, the pilot must continue the takeoff rather than attempting to stop. This speed is determined by various factors including aircraft weight, runway length, and environmental conditions.

Understanding V1 is essential for pilots, as it helps ensure that they make safe and timely decisions during takeoff. Once this speed is reached, the aircraft is considered in a position that it is too late to safely stop on the runway, emphasizing the importance of knowing and accurately calculating this speed prior to takeoff.