What is the maximum tailwind for takeoff, landing, or engine start?

What is the maximum tailwind for takeoff, landing, or engine start?

• A. 5 kts
• B. 15 kts
• C. 20 kts
• D. 10 kts

Answer: (D)

The key idea is that tailwind affects performance and safety margins for takeoff, landing, and engine start. A tailwind increases the airplane’s ground speed during takeoff and landing, which in turn raises the distance needed to reach liftoff speed or to stop after touchdown. It also reduces the effectiveness of braking and can shorten the available runway margin. To preserve safe margins across operations, the published limit is ten knots for tailwind. If the tailwind were higher, there would be a greater risk of overruns or insufficient performance, especially on shorter or contaminated runways. A limit of five knots would be more restrictive than necessary, while fifteen or twenty knots would exceed safe operating margins for takeoff, landing, and starting procedures.

The key idea is that tailwind affects performance and safety margins for takeoff, landing, and engine start. A tailwind increases the airplane’s ground speed during takeoff and landing, which in turn raises the distance needed to reach liftoff speed or to stop after touchdown. It also reduces the effectiveness of braking and can shorten the available runway margin. To preserve safe margins across operations, the published limit is ten knots for tailwind. If the tailwind were higher, there would be a greater risk of overruns or insufficient performance, especially on shorter or contaminated runways. A limit of five knots would be more restrictive than necessary, while fifteen or twenty knots would exceed safe operating margins for takeoff, landing, and starting procedures.