ON-BOARD DEVICE FOR ENGINE PROTECTION FROM INGRESS OF FOREIGN OBJECTS Russian patent published in 2019 - IPC B64D33/02 F02C7/05 

FIELD: aviation.

SUBSTANCE: invention relates to the protection of aircraft engines from the ingress of foreign objects. Onboard device to protect the engine from foreign objects contains movable bottom panel (1) located in housing (7) of the air intake, and has two panels (12, 13) of the bottom panel on two transverse axes, which simultaneously make oscillatory movements in the transverse plane of the bottom panel with periods of oscillations T=1.0–4.0 s – aft panel (12) upward at an angle α_r=25–30°, and transverse panel (13) is down at an angle α_n=25–30°. Aft 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 the bottom panel (1), m; c – the length of the aft panel (12), m; k is the length of the transverse panel (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