Which of the following is true about the effect of a clearway on V1?

V1, or decision speed, is the maximum speed at which a pilot can make a decision to abort a takeoff and still stop within the available runway length. The clearway is an area beyond the end of the runway that is free of obstacles and is used to provide an additional margin for safety in the case of an engine failure.

When considering the effect of a clearway on V1, it does not inherently affect V1 in terms of increasing or decreasing it directly. The presence of a clearway means that if an engine failure occurs right at or after V1, the aircraft can climb without immediate obstruction, which can be beneficial. However, the clearway does not change the physical parameters that determine V1 itself, such as aircraft weight, runway length, and gradient; it simply allows for more operational flexibility. Consequently, the correct statement is that the clearway does not affect V1.