DEVICE FOR ENGINE PROTECTION FROM INGRESS OF FOREIGN OBJECTS Russian patent published in 2019 - IPC B64D33/02 F02C7/55 

FIELD: engine building.

SUBSTANCE: invention relates to the protection of aircraft engines from the ingress of foreign objects. Onboard engine protection device against the ingress of foreign objects contains movable lower panel (1) located in housing (7) of the air intake, and has two panels (12, 13) of the lower panel on two transverse axes in the lower part. Panels (12, 13) simultaneously make oscillatory movements upwards in the transverse plane of the bottom panel at the corners α_n = 25–30° with periods of oscillation T = 1.0–4.0 s. Rear panel (12) is located from the edge of bottom panel (1) at a relative length of . Transverse panel (13) is located at a relative length of , both are made with a relative width of , where l – length of bottom panel (1), m; b – width of bottom panel (1), m; s – the length of the aft panel (12), m; k is the length of transverse socket (13), m; d – width of panels, m.

EFFECT: invention increases the efficiency of the engine protection device in all operating modes on the ground.

1 cl, 3 dwg