AIRCRAFT AIR INTAKE Russian patent published in 2017 - IPC B64D33/02 H01Q17/00 

FIELD: airpower.

SUBSTANCE: in the air channel (1) of airplane air intake, an anti-radar grid (6) is installed at an angle γ, ranging from 30 to 90° relative to the longitudinal axis of the channel. The air channel (1) is limited by walls of air inlet, and also by movable panels (2, 3). On the one side the air channel (1) is opened for airflow through inlet (4) of air intake, and on the other side from the inlet (4), the air channel (1) is connected to the input guide vanes (5). Grid I length in a direction parallel to longitudinal axis of the channel, depends on diameter of air channel in place of grid (6) and is between 0.3 and 0.6 of diameter d of air channel (1). The distance along the longitudinal axis of the air channel (1) from the grid to the input guide vanes (5) is from 0.7 to 1.2 of diameter d of channel (1).

EFFECT: invention reduces the radar visibility of the airplane air intake by increasing radio-absorbing and radio-suppressing capacity of air channel due to lengthening of its reflecting planes.

6 cl, 5 dwg