English: The rear part of a sectioned Rolls-Royce Turboméca Adour turbofan displayed at the Musée de l’Air in Paris, France. Air flow is from the background of the photo towards the viewer. The afterburner with its four combustion rings is clearly seen at the center. During cruise flight, no combustion takes place there and the afterburner generates pressure loss without an increase in gas energy. Elements of the variable geometry nozzle can be seen at the edges of the photo.