What effect does an uphill runway slope have on takeoff performance?

What effect does an uphill runway slope have on takeoff performance?

• A. Decreases takeoff distance
• B. Increases takeoff distance
• C. No effect on takeoff distance
• D. Reduces engine power

Answer: (B)

An uphill runway slope affects takeoff performance by increasing the takeoff distance required. When an aircraft takes off from an uphill slope, it must overcome the gradient in addition to achieving the necessary lift. The incline forces the aircraft to use more energy to climb against gravity, thereby requiring a longer distance to reach the necessary speed for takeoff.

The configuration of the runway means that the aircraft starts its takeoff roll at a disadvantage, as part of the kinetic energy must be used to counteract gravity instead of solely being used for acceleration. As a result, pilots must be aware of the slope when calculating takeoff distances, as they will need to establish a longer takeoff run before achieving lift-off compared to a level runway.