DEVICE FOR PROTECTION OF FLYING VEHICLE ENGINE AGAINST FOREIGN OBJECT INGESTION Russian patent published in 1999 - IPC

FIELD: aviation; devices for protection flying vehicle engines against foreign object ingestion. SUBSTANCE: device includes movable lower panel mounted in air intake case. Movable lower panel may perform angular motion. length of lower panel is related to height B of midsection of air intake at the following relationship . Width b_l of lower panel is related to width L of midsection of air intake at the following relationship . Lower panel may perform forward motion in horizontal direction and oscillatory motion through angle of α = 45^°- 60^°=45 to 80 deg at oscillation period of T=2.0-4.0 s. EFFECT: avoidance of suction of vortex core inside air intake together with foreign matter. 2 dwg