How do wings generate lift when flying upside down?

Question

How do wings generate lift when flying upside down?

In: 91

Answer 1

Airplane wings generate lift by deflecting air downwards. Newton’s laws are sufficient. A flat wing that is inclined to deflect incoming air downward will generate reactive forces upward.

Wing shapes can change the airflow profiles to increase attack angles, before stalling. The Bernoulli explanations of differential surface speeds only cause confusion.

So an inverted wing generates lift by angling into the airflow so that incoming air is deflected downwards. The same way that normally inverted wings operate.