Why don't we place the engine in the front of the wings? I learnt in class today that fast-moving air over the wing of the plane, which causes a difference in pressure on the airfoil due to something called Bernoulli's principle.
If this is so why cant the engine be placed in front of the wings since the exhaust from the engine can help the plane in take off.
I'm only a beginner at fluid dynamics thus the silly question.
They can be, as on the An-72/74, which has the engines mounted above and forward of the wings in part to increase lift, utilizing the Coanda effect.
One downside is that this makes access for maintenance more difficult, which is a large factor in operation costs.
https://en.wikipedia.org/wiki/Antonov_An-72
https://en.wikipedia.org/wiki/Coand%C4%83_effect