The Bernoulli equation only applies to *incompressible* flow.

Right. But the Bernoulli principle applies to compressible and
incompressible flow. It is the source of the venturi effect, which
occurs in air, among other places.

What about reflexed airfoils?

I am not familiar with them. The trailing edge is depicted as pointing
up; does it do so when the wing is at a lifting angle of attack? Is
there an airflow separation near the trailing edge? If air is not being
deflected downwards somewhere, we're back to the lifting fairies.

Jose
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