aerodynamics - Is there ground effect flying below an infinite 2D plane as opposed to above one? - Aviation Stack Exchange

People talk about wing tip vortices and say things like the ground acts as an aerodynamic mirror. What (if any) difference would there be for a wing flying underneath a 2D plane? As in the picture

Turbomachinery and Aero-Related Activities at BBC and in International Context up to 1935

Fuel Consumption Mitigation of Aircraft by Applying Astonishing Ideas

seaplane - Were stub wings on early flying boats designed or able to exploit ground-effect lift? - Aviation Stack Exchange

aerodynamics - What is the difference between ground effect for an infinite wing and for a finite wing? - Aviation Stack Exchange

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What is ground effect and why are the wings of an aircraft not placed in it? - Quora

Numerical simulation of DLR-F6 wing-body flow field in ground effect - ScienceDirect

September 2021 - U.S. Edition in English by AgAir Update - Issuu

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How can an airplane produce the same lift in ground effect as when out of ground effect? - Quora

DARPA contracts General Atomics to develop ground effect freighter concept - AeroTime