Abstract: A rocket stage having a frame is disclosed. The frame includes a nose part and a mid-section part. The frame is configured to separate into two or more gliding parts after the stage has fulfilled its main purpose. After separation, the gliding parts glide down to the ground. The gliding part comprises a section of the nose part and a section of the mid-section part and a flat gliding surface alongside the section of the mid-section part. The slope of the nose part of the gliding part is steeper than the slope of the mid-section part of the gliding part. The air flows around the frame of the gliding part and a vortex forms above the upper edges of the gliding part, forcing the gliding part in the gliding position when it is in the atmosphere.

Abstract: The object of the invention is a method for generating lift for an airborne flying device, which has a wing part and/or a fuselage part generating lift by means of interactive movement between the air and the device. In the method, in the frontal view area of the lift-generating part of the device is arranged at least one counterflow impulse surface (1), which is formed by a planar or curved surface extending forward in the direction of travel from the lower surface (2) of the wing and/or fuselage and obliquely upwards, and which generates at least the main part of the lift when the airflow hits this inclined impulse surface and bends when the device is airborne.