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A variable area exhaust nozzle with a variable thrust vector angle for a turbo-fan engine and mounted on the aft portion of the nacelle which wraps said engine. The nozzle may include a fixed structure having at least two lateral arms separating two radial cutouts. The cutouts are positioned one abo

A variable area exhaust nozzle with a variable thrust vector angle for a turbo-fan engine and mounted on the aft portion of the nacelle which wraps said engine. The nozzle may include a fixed structure having at least two lateral arms separating two radial cutouts. The cutouts are positioned one above the other, one being located above the engine axis, the other one below the engine axis. At least two shells close the fixed structure cutouts and are pivotally mounted on the fixed structure to form a portion of the exhaust nozzle of the engine. A sealing means ensures fluid tightness between the shells and the fixed structure for any angular position of said shells. Actuator means are provided for pivoting the shells either to a symmetrical configuration for changing of the value of the exhaust area of the nozzle or to an unsymmetrical configuration for changing the angle of the thrust vector of the exhaust nozzle. In operation, the value of the exhaust area and the thrust vector angle of the exhaust nozzle are varied during flight to optimize performance of the aircraft.

대표청구항 ▼

A variable area exhaust nozzle with a variable thrust vector angle for a turbo-fan engine and mounted on the aft portion of the nacelle which wraps said engine. The nozzle may include a fixed structure having at least two lateral arms separating two radial cutouts. The cutouts are positioned one abo

A variable area exhaust nozzle with a variable thrust vector angle for a turbo-fan engine and mounted on the aft portion of the nacelle which wraps said engine. The nozzle may include a fixed structure having at least two lateral arms separating two radial cutouts. The cutouts are positioned one above the other, one being located above the engine axis, the other one below the engine axis. At least two shells close the fixed structure cutouts and are pivotally mounted on the fixed structure to form a portion of the exhaust nozzle of the engine. A sealing means ensures fluid tightness between the shells and the fixed structure for any angular position of said shells. Actuator means are provided for pivoting the shells either to a symmetrical configuration for changing of the value of the exhaust area of the nozzle or to an unsymmetrical configuration for changing the angle of the thrust vector of the exhaust nozzle. In operation, the value of the exhaust area and the thrust vector angle of the exhaust nozzle are varied during flight to optimize performance of the aircraft. f the vertical side wall enclosure. 2. The bait station of claim 1, wherein said vertical side wall enclosure includes a plurality of vent holes. 3. The bait station of claim 2, further comprising a bait holder for holding bait, and bait holder holes on opposite sides of the vertical side wall enclosure, wherein said bait holder is sized to fit into said bait holder holes and extend across the interior. 4. The bait station of claim 3, wherein said vent holes are located above said bait holder holes. 5. The bait station of claim 1, further comprising a hinge extending between said pivotally connected sections, said hinge including a pivot axis spaced from said vertical side wall surfaces. 6. The bait station of claim 1, wherein said roof includes an awning extending past the outer surface of the vertical side wall enclosure at an upper portion. 7. The bait station of claim 6, wherein said roof includes a hanging plate and a hole therein for suspending said bait station. 8. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure having inner and outer surfaces, a bottom end, and a top portion; a roof positioned adjacent the top portion of the side wall enclosure; an interior defined by and fully surrounded by the inner surface of the vertical side wall enclosure and the roof; wherein said bottom end of the vertical side wall enclosure is substantially open causing the interior to be substantially unbounded from below, such that when bait is positioned in the interior, insects may freely fly upward into the bait station through the substantially open bottom end of the vertical side wall enclosure; a bait holder for holding bait, said bait holder including a bait container, and bait holder holes on opposite sides of the vertical side wall enclosure, wherein said bait holder is sized and configured to fit into and is coupled to, said bait holder holes and extends across the interior; wherein said bait station is void of structure directly beneath the bait container. 9. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure having inner and outer surfaces and a top portion and a bottom end, said vertical side wall enclosure further having a plurality of vent holes extending from the inner surface to the outer surface; a roof positioned adjacent the top portion of the side wall enclosure, said roof having an awning extending past the outer surface of the vertical side wall enclosure; an interior defined by the inner surface of the vertical side wall enclosure and the roof, said interior intended for holding bait, wherein attractant from such bait being permitted to permeate through said vent holes to attract flying insects, said bottom end of the vertical side wall enclosure being substantially open and substantially void of passageway blocking structure permitting a flying insect to fly directly upward into the interior from beneath the bait station at substantially any region below the interior; and a bait holder for holding bait, and bait holder holes on opposite sides of the vertical side wall enclosure, wherein said bait holder is sized to fit into, and is coupled to, said bait holder holes and extends across the interior. 10. The bait station of claim 9, wherein said vent holes are located above said bait holder holes. 11. A bait station for flying insects comprising: a vertical side wall enclosure, said vertical side wall enclosure including a plurality of curved shell elements each pivotally coupled to an adjacent curved shell element, inner and outer surfaces and having top and bottom portions, said vertical side wall enclosure further having a plurality of vent holes extending from the inner surface to the outer surface; a roof positioned adjacent the top portion of the side wall enclosure; an interior defined by the inner surface of the vertical side wall enclosure and the roof, said in