BODY - A disc is a lifting body, when in forward flight. A wings airfoil.
Air is accelerated downwards by a wings airfoil.
A lifting body. A VTOL disc does not have wings, but a disc shaped body can produce lift, when in forward flight. A super craft that has no trouble flying from you roof to mars and back. Mach 1 at 45,000 feet is about 295 meters per second. Changes in pressure at controlled density have virtually no effect on the speed of sound.