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

FIELD: aeronautical engineering; devices for protection of flying vehicle engines against foreign object ingestion. SUBSTANCE: device includes upper movable panel of air intake and lower movable panel of air intake. Movable panel of air intake may perform forward motion in horizontal direction. Forward horizontal motion of upper panel relative to width of middle section of air intake is equal to . Length l_up of upper panel and height B of middle section correspond to the following relationship . Movable lower panel of air intake is deflectable up and down through angle of 15 to 20 deg. Length l_low of lower panel and height B of middle section of air intake correspond to relationship . EFFECT: avoidance of probability of leading edge stall of lower panel of air intake and eddying flow at its inlet. 2 dwg