The organization named UEC first presented to the public at the Dubai Airshow 2025 a fifth-generation power unit under the index 177S, as well as its enhancement. These latest engine models surpass foreign counterparts in the combination of combat and operational parameters and can be integrated into both already operated aircraft and future projects. At the exposition, the UEC corporation is demonstrating a full-scale model of the 177S specifically, which, it is claimed, boasts improved performance compared to power plants of the previous cycle, as reported by “Rostec.” Representatives of the corporation explained that this novelty belongs to the “five” generation and clearly surpasses its “predecessors” and many foreign analogues in a number of characteristics. The 177S engine is capable of developing thrust up to 14.5 tons, while its service life has tripled, indicating a significant increase in the unit’s operating duration compared to previous versions. The state corporation clarified that the engineering solutions applied made it possible to increase thrust capabilities without changing the dimensions and weight of the engine, which is identical to the AL-31F/FP engine installed on Su family aircraft. Consequently, the 177S can be used as a direct replacement for previously installed engines without the need for design modifications. The service life of this new unit is 6000 hours. Provided that resource requirements are reduced, there is potential for further increasing its thrust. “Rostec” also noted that thanks to the implementation of innovative technical approaches, fuel consumption across all operating modes has been reduced by 7 percent. This, in turn, leads to lower operating costs, increased aircraft range, and expanded capabilities for performing complex maneuvers. Moreover, the engine provides increased output power to meet the needs of modern aircraft’s onboard electronic suites. The state corporation further reported that UEC engineers are developing a version of the 177S intended for integration into future fifth-generation aviation systems. This new development is currently undergoing active testing within Russia. The modification will feature even higher thrust figures and even more economical fuel consumption in all modes. This will give aircraft a significant reserve for long-duration supersonic cruise flight at all altitudes.
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