How does an airplane fly inverted for more than a few seconds without losing altitude? If the wing cross-section, curved on top and flat below, generates lift, wouldn't it generate downforce upside-down? -
Expert Reveals Secret to Flying Airplanes Upside Down
Flying Upside Down | How Things Fly
Boeing 777 Flies Upside Down - YouTube
Grumman X-29: The impossible fighter jet with inverted wings | CNN
11. Landing Inverted - Plane & Pilot Magazine
My plane window is upside down! : r/mildlyinteresting