FIELD: aircraft engineering. SUBSTANCE: flying vehicle airfoil which commonly has a cross-convex or flat form and oblique leading edges and is located ahead of the air intake is shaped with a cross concavity which curvature increases down the flow. A supersonic flow which flows over such a surface at an incident angle produces a converging stream flow with pressure increase down the flow. EFFECT: improved engine operational characteristics and flight performance. 3 cl, 3 dwg
