PROFILE AND PROCESS FOR CHANGING THE MAXIMUM ANGLE OF ATTACK OF APROFILE

摘要

The invention relates to a method for varying the maximum angle of attack of the profile of an elongated body moving in a stream. In this method, at least one step (2) is formed on the side of the surface of the body profile where a stronger low-pressure field is desired with the aid of turning profile parts (5, 6, 11) by swinging a profile part counter-clockwise about a hinged point (7, 7a, 7b) if the step is desired on the upper surface (13) of the profile, and clockwise if the step is desired on the lower surface (14) of the profile as the profile is moving from the right to the left in the stream with its front edge and rear edge positioned as in figure (2), the profile being substantially airtight after the step has been formed, and when the body is moving at higher speeds in the stream, the total flow resistance is reduced by turning the same profile part about the hinged point (7) in a direction opposite to the forming direction.