Which of the following is a factor that increases V1?

Which of the following is a factor that increases V1?

• A. Decreased weight
• B. Increased density altitude
• C. Tailwind component
• D. Headwind component

Answer: (D)

V1 is the decision speed during takeoff at which a pilot must continue the takeoff after an engine failure or abort the takeoff if the failure occurs before this speed. One of the factors that increases V1 is a headwind component. When there is a headwind, the aircraft experiences an increased relative airflow over its wings, which generates lift more efficiently at a lower ground speed. As a result, the aircraft reaches the necessary speed for takeoff sooner. This means the V1 speed threshold is higher because the aircraft can safely continue the takeoff after the loss of an engine at that point. In contrast, the other options present factors that would not lead to an increase in V1. Decreased weight would lower V1 since the aircraft would require less speed to become airborne. Increased density altitude reduces the air density, resulting in a requirement for a higher speed for takeoff, but this effect would typically decrease V1 when combined with other factors. A tailwind component, similar to increased density altitude, also decreases the effective speed at which the aircraft can achieve takeoff, thereby reducing V1. Overall, the presence of a headwind offers a crucial advantage during takeoff, allowing for a higher V1.

V1 is the decision speed during takeoff at which a pilot must continue the takeoff after an engine failure or abort the takeoff if the failure occurs before this speed. One of the factors that increases V1 is a headwind component.

When there is a headwind, the aircraft experiences an increased relative airflow over its wings, which generates lift more efficiently at a lower ground speed. As a result, the aircraft reaches the necessary speed for takeoff sooner. This means the V1 speed threshold is higher because the aircraft can safely continue the takeoff after the loss of an engine at that point.

In contrast, the other options present factors that would not lead to an increase in V1. Decreased weight would lower V1 since the aircraft would require less speed to become airborne. Increased density altitude reduces the air density, resulting in a requirement for a higher speed for takeoff, but this effect would typically decrease V1 when combined with other factors. A tailwind component, similar to increased density altitude, also decreases the effective speed at which the aircraft can achieve takeoff, thereby reducing V1.

Overall, the presence of a headwind offers a crucial advantage during takeoff, allowing for a higher V1.