Final assembly starts on MS-21 powerplant

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Russian aero engine designer Aviadvigatel has begun final assembly of its PD-14 powerplant for the United Aircraft MS-21 twinjet.

It aims to complete building of a demonstrator in May and conduct its first test run in June. Speaking at an industry show in Moscow, Aviadvigatel chief designer Alexander Inozemtsev said the Central Aeroengine Institute has already tested one of the PD-14's two high-pressure turbines.

"There are also four gas generators and several other key modules undergoing pre-assembly design verification testing and calibration," he adds. "One of the key tasks facing us and United Engine Corporation is to line up all parts and components suppliers for the [PD-14] serial production."

Inozemtsev says it tentatively envisages annual delivery of up to 200 engines in seven to eight years for the MS-21 production programme.

The PD-14, which is designed to power the baseline MS-21-300 variant, will generate 30,800lb (137kN) of thrust and feature a two-shaft high-pressure turbine and eight-stage high-pressure compressor for the core.

Aviadvigatel is also developing the PD-14M and PD-14A turbofans for the twinjet's shortened and stretched variants, respectively.

Development costs are estimated at Rb70 billion ($2.36 billion), of which a third has already been invested, says Inozemtsev, indicating that these investment requirements have so far remained unchanged.

Aviadvigatel has signed an agreement with the Russian airworthiness authority Interstate Aviation Committee to carry out the PD-14 certification to meet AP-23 standards.

"At the same time, we'll work to receive [European] approval so that the engine could be validated under harmonised international requirements by 2015-16," says Inozemtsev.