Moving control surfaces are simpler, from an engineering perspective.
I'd worry the failure modes of a pressurised air system, which are surely more numerous than a simple mechanical flap. Any failure would be catastrophic to the airplane.
I'd worry the failure modes of a pressurised air system, which are surely more numerous than a simple mechanical flap. Any failure would be catastrophic to the airplane.
Of course, there's bound to be a caveat or ten, since else why wasn't it tried earlier? It doesn't look technologically advanced, doesn't look like it couldn't have been done decades ago.
2. Aircraft control surfaces are quite a bit more involved than being "a simple mechanical flap".
They're amazing but they violate the intuitive moving-parts-to-risk count.