correct. but what about Y-20 as flying test bed ? CJ-2000 is a heavy engine so Y-20 require little modification.
Chinese Engine Development
- Thread starter jackbh
- Start date
Structural change is only one thing. The other is the balance of all engines envolved. The possible thrust range of the engine being tested is limited by the other three. For example, when taking off one must anticipate the testing engine failure causing the aircraft to loose 35t thrust, so the other engine on the same side has to be powerful enough to boost up to compansate to prevent an out of control spin. I think in crusing test compansation is also difficult if the other engine is much less powerful. So the testbed's other engine has to be close in thrust as CJ-2000.
Wait CJ-2000 seems to be at similar stage to CJ-1000? It seems to be making surprisingly faster progress.
Three WS-18/D-30KP are enough to stabilize Y-20 as aircraft will be empty during testing except fuel.
Yeah when it’s operational or put on a working plane, it will be a real fan changer for China. Opening Many uncountable doors for the country
I guess they could slowly ease off with homegrown engines as time goes by until it’s proven and reliable enough. After all, commercial civil aero engines are not military ones, safety and reliability standards and much more higher . So the engine need a lot of time to mature. It’s a smart move to start with an already proven reliable engine with RR, so they don’t stall the project .
CJ -2000 just like CJ-1000 will need a lot of time to mature, so it’s good to be using other mature engines until then while keeping the project going .
Depends, CJ-1000A should be at the TC and PC stage by now and is due for production maybe even late this year or 2027. CJ-2000, if rumors are true was at the first full scale ignition stage in early 2025 which iirc is roughly equivalent to ~2018 level of progress for the CJ-1000A but it is much faster as the goal for certification is less than 5 years away while CJ-1000A took nearly 10 years to reach that stage. Also, ironically if the 2030 date is true than this is probably the first time in Chinese aviation history where the engine was ready before the actual airframe.
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Hopefully we'll get more information on CJ-2000 during Zhuhai 26'. AFAIK, I don't think the core design and material science is an issue for China anymore given WS-15 and WS-19's production but fan technology is something China has not had many experiences in, and IMO could be the dealbreaker for whether CJ-2000 will be able to complete the leap to match industry leaders such as RR in commercial high bypass turbofan.
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There’s really no distinction between the fan vs the core in terms of technical competences involved.