Original: A parachute is a device used to slow the motion of an object through an atmosphere by creating drag or aerodynamic lift generated by a parachute canopy shaped like an aerofoil which is able to generate lift by its forward speed through the air .
Simplified: Drogue parachutes are used to aid horizontal deceleration of a vehicle ( a fixed-wing aircraft , or a drag racer ) , or to provide stability ( tandem free-fall , or space shuttle after touchdown ) .