aerial refueling aerodynamics aileron airbus aircraft aircraft carrier airfoil angle of attack bat bird bird flight dihedral domina jalbert fin fixed-wing aircraft flight flight feather flying and gliding animals folding wing formula one car francis rogallo gas gull wing hangar helicopter hydrofoil hydroplaning insect insect flight insect wing kite types laughing gull leading edge leading edge extension leading edge slot lift-to-drag ratio list of soaring birds order of magnitude parachutes planform pressure pterosaur sailing slats submarine swept wing thrust trailing edge variable-sweep wing vortex generator wikimedia commons wing configuration wing fence