FIELD: engine devices and pumps.
SUBSTANCE: preliminary in the course of acceptance tests of an engine at a stand, the engine is driven to the maximum mode at a constant diameter value of a nozzle throat section, then the area of the nozzle throat section area is changed to a diameter exceeding the minimum diameter by 0.1…0.2%, perform measurement expansion degree on turbines and switch thereof to engine controller program to maintain a given expansion degree in the turbine afterburner operation modes.
EFFECT: increased stability of engine operation and optimum traction and economic performance over the entire range of altitudes and flight speeds.
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