An aircraft leaving ground effect during takeoff will
experience an increase in induced drag and a decrease in performance.
experience certain changes in its aerodynamic performance due to its departure from the ground effect. Some of these changes are mentioned below:
1. Increase in Induced Drag: As the aircraft moves away from the ground, the lifting force generated by the wings decreases, leading to an increase in the induced drag. The induced drag is directly proportional to the lift generated by the wings, which means that as the aircraft moves away from the ground, the induced drag increases, making it more difficult for the aircraft to maintain altitude.
2. Decrease in Lift to Drag Ratio: The lift to drag ratio (L/D ratio) is an important indicator of an aircraft’s aerodynamic performance. As the aircraft leaves the ground, its L/D ratio decreases due to the increase in induced drag compared to the lift generated by the wings. This results in a reduced efficiency of the aircraft, causing it to require more power to maintain a given speed and altitude.
3. Increase in Stall Speed: The stall speed of an aircraft is the minimum speed at which it can maintain level flight. As the aircraft leaves ground effect, its stall speed increases due to the reduction in the lifting force generated by the wings. This means that the aircraft will need to fly faster to maintain its altitude, which will require more power and fuel.
4. Increased Control Inputs: To maintain control over the aircraft during takeoff and climb, the pilot will need to use larger control inputs to compensate for the changes in the aircraft’s aerodynamic performance. This includes increased use of the elevator to maintain altitude and the ailerons to counteract the increase in induced drag.
In summary, leaving ground effect during takeoff will result in an increase in induced drag, a decrease in the lift to drag ratio, an increase in stall speed, and increased control inputs to maintain the aircraft’s stability and altitude.
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