Ever wonder how wings on an airplane are like wings on a bird? "anonymous!@" asked us just that question! To find out how wings on a glider move through the air and create lift and drag, watch this animation of a glider being tested in a wind tunnel.
Aircraft wing designers have always been inspired by birds. Birds glide for maximum lift and fold their wings for reduced drag -- which is exactly what aviation engineers want for the airplanes that they create.