AIR INLET DEVICE FOR AN INLET DUCT TO AN ENGINE OF AN AIRCRAFT

An air inlet device (100) for an air inlet of an aircraft is described. The air inlet device (100) has a plurality of air guide arrangements (130). An air guide arrangement (130) has an inlet plate (131), an outlet plate (139), and a plurality of pivot plates (133, 135, 137) arranged therebetween. The outlet plate and the pivot plates can be rotated about a central axis of the air inlet device by adjustment rings, so that the air guide arrangement (130) is transitioned from a linear state to a curved state, and vice versa. The air inlet device allows for selective switching between a state with low radar signature and a state with high performance of an engine.