Investigations of the boundary-layer control on a full scale swept wing with air bled off from the turbojet

The following account reviews the various stages of a research program relative to the high-lift devices on a swept wing by combined suction and blowing (jet action), with ejectors fed by air bled off (extracted) from the turbojet. After reviewing the essential principles of the boundary-layer control obtained by comparison with theory, the electric analogies and the wind-tunnel tests as well as the essential elements of ejector operations, the writers describe the tests made in the large tunnel at Chalais-Meudon on a full-scale model of the SO 6020 wing.