UEC has developed a composite fan blade for PD-35 aircraft engine

As part of the project to create the PD-35 aircraft engine, United Engine Corporation (UEC) of the Rostec State Corporation has developed the necessary element of the power unit — a composite fan blade, the Executive Director of UEC Valery Geikin has reported.

UEC develops the technology of composite fan blades manufacturing within the program of creating a family of high thrust engines in 25-50 ton-force class. According to Valery Geikin, achieving the desired parameters of the PD-35 engine requires the development of about 18 key technologies, major of which is fan blade made of the composite materials. Chief Designer of UEC-Aviadvigatel design bureau Alexander Inozemtsev clarified that the transition from the common titanium blade to the hollow titanium one allowed to reduce the weight of the fan by 30% and the use of a composite blade will give the extra 30% weight reduction.

“Along with R&D Institutes we have created the design and technology of this blade, built the first prototype sets, and conducted necessary scope of testing. All that gave us a possibility to assemble the engine with these blades and start bench tests”, — TASS news agency cited Alexander Inozemtsev’s words.

In August 2020 high-speed tests of the engine will be started. Then, there will be additional researches to confirm the resistance of the composite blades to foreign objects entering the engine. According to Alexander Inozemtsev, the successful completion of these tests will allow to start flight tests of the PD-14 engine with composite fan blades on the IL-76LL flying testbed in 2021.

Serial production of the blades will be launched at the “UEC-Saturn” facility. PD-35 high bypass turbofan engine is being developed for future wide-body commercial aircrafts.