How Does Propeller Placement Affect Wing Lift?

AI Thread Summary
Propeller placement in front of wings can enhance airflow, potentially increasing lift due to accelerated air around the wing. However, the turbulent wake generated by the propeller may negatively impact lift quality compared to smoother free-stream airflow. The engine nacelle's attachment to the wing does not contribute to effective lift. The goal is to create greater underwing pressure than overwing pressure to optimize lift. Overall, while propeller placement can influence lift, the effects of turbulence and nacelle design must be considered.
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If the propeller is placed in front of wings and since the job of the propeller is to accelerate the airflow, wouldn't it result in faster airflow around the wing resulting in increased lift?
 
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IIRC, the wake of the propeller is turbulent, or at least not as smooth as one would like. In fact there is probably some rotation in the prop wake, which means the lift (if any) is not as good as the lift coming from the free stream.

Also consider the fact that the engine nacelle is attached to the wing, underside or top and bottom, so there is no effective lift from the engine.

The idea is to develop an underwing pressure which is greater than overwing pressure.
 

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