FIELD: aviation; devices for protection flying vehicle engines against penetration of foreign matter. SUBSTANCE: proposed device has movable lower panel mounted in air intake body. Panel performed translational motion in horizontal direction; it consists of two panels performing simultaneous oscillatory motion from level of edge of air intake downward at angle α = 30 to 60 deg. and oscillation period T = 0.5 to 2.0 s; these panels are located at distance c = 0.005 to 0.01 m from leading edge. Length llow of said panels and height B of midsection of air intake are made at the following relationship: 
= 0.3 to 1.2; width blow of said panels and width L of midsection of air intake are made at the following relationship: 
= 0.3 to 0.5. EFFECT: reduced probability of sucking vortex core inside air intake together with foreign matter. 3 dwg
