FIELD: aircraft engineering; more specifically engines.
SUBSTANCE: high altitude turbofan engine contains an air intake, a fan, two air flow paths and two turbines. The engine is equipped with a device that shuts off the secondary duct of the air flow at a given flight altitude and directs all the air flow entering the air intake into the main duct. The device is installed on the outer side of the main duct in the area of the compressor and the combustion chamber and consists of hydraulic cylinders pivotally connected by rods to a cylindrical washer. The washer is pivotally connected by rods with flaps pivotally fixed at the end of the main duct body. From the outside, the device is partially closed by a fairing.
EFFECT: reduction in fuel consumption.
1 cl, 2 dwg
