Лихэмньюс анализ МС-21 часть 4:
https://leehamnews.com/2016/03/14/irkut-mc-21-analysis-part-4-performance-pd-14/
IRKUT MC-21 analysis, Part 4. Performance with PD-14
By Bjorn Fehrm
Introduction
March. 14, 2016, ©. Leeham Co: In three articles we have been looking at the new Russian single aisle aircraft, Irkut MC-21, from United Aircraft and the new Russian engine that is being developed for the aircraft, the PD-14.
The PD-14, which is offered as an alternative to the base engine for the aircraft, the Pratt & Whtiney PW1400G, was analysed in our
Part 3 article. We now mount the engine on the MC-21 and explore the difference in performance compared to the base engine.
Summary:
The PD-14, which is a new engine designed by the Aviadvigatel company, is a clear step forward for the Russian turbofan industry.
- In our analysis in Part 3, we could see that it has a classical direct drive construction with a good level of technology in several parts.
- Weight and installation dimension are similar to the competition but efficiency is a bit behind.
- We now explore the performance of the MC-21 with the Russian engine.
Discussion
In
Part 3, we did a thorough analysis of the PD-14 engine with the help of the GasTurb analysis software. The results are summarized in Figure 1.
Figure 1. Engine data complied with GasTurb for PD-14. Source: Leeham Co.
The technology level of the PD-14 is about half-to-one generation behind the latest Western engines. The result is a design which delivers a fuel efficiency which is around 5% short of the best western designs. The engine weight can be kept at the level of its Western competitors (2780kg) by use of a smaller fan diameter, 75 inches, compared with 78 (LEAP 1A) and 81 (PW1400G).
When we put the PD-14 on the MC-21, we get a max range which is about 220nm shorter than for the PW1400G-equipped variant, Figure 2.