Abstract: A coupling system for glasses having two stems and a frontal frame includes: for each of stem, a pin made of flexible material and having two opposite ends; two blind holes made on coupling portions of the frontal frame; and a through seat made on ends of each of stems adapted to receive the pin. The second end of each stem including the pin in the respective seat is adapted to be inserted in the respective coupling portion of the frontal frame so the ends of the pin are inserted into the blind holes made therein by elastic deformation of the pin and/or of the coupling portions.

Abstract: A flow body for an aircraft includes a recess in a surface of the flow body, a first structural component with a porous material and may also include a second structural component with a porous material. The recess includes a front recess region and a rear recess region. The first structural component is arranged in, or on, the front recess region and the second structural component may be arranged in, or on, the rear recess region. An aircraft having the flow body, a weapons system having the flow body and a method for manufacturing a flow body for a vehicle are also described.

Abstract: A flow body for an aircraft includes a recess in a surface of the flow body, a first structural component with a porous material and may also include a second structural component with a porous material. The recess includes a front recess region and a rear recess region. The first structural component is arranged in, or on, the front recess region and the second structural component may be arranged in, or on, the rear recess region. An aircraft having the flow body, a weapons system having the flow body and a method for manufacturing a flow body for a vehicle are also described.