Chinese Engine Development

G

GiantPanda

Junior Member
Registered Member
Alfa_Particle said:
*CFM-56-5B

Next relatively small step is the CJ-1000A, on the same level as the CFM LEAP series.

And the one after that is a giant step, CJ-2000(A?), allegedly on the Rolls Royce Ultrafan level.
Click to expand...

I don't think you can really take a bigger step than the CJ-1000A. This is a civilian TF with all the associated reliability
and performance parameters that must come with a commercial engine.

You do not tackle this unless you are pretty far along the aircraft powerplant technology curve.

And the CJ-1000 is not just some project on paper. It is on a Y-20 flying testbed! Think about that.
 
G

GiantPanda

Junior Member
Registered Member
OppositeDay said:
CFM56-5B first flew in 1993. It's an early-mid 1990s engine. When I wrote WS-20 seemed to be comparable to early-mid 1990s Western engines, I specifically had CFM56-5B in mind.
Click to expand...

The LEAP is the immediate successor to the CFM56. That level of tech is being met by the CJ-1000.

The mass production of civilian CFM56s (B8/9) ended only in 2019.

The military variants (for P-8A, E-7, etc.) are still being built today. The WS-20 is a military engine.

I guess you can be technically correct on the B5 being from the 1990s but this "1990s" tech is also on a huge numbers of Western planes both civilian and military today.
 
A

Atomicfrog

Major
Registered Member
GiantPanda said:
I guess you can be technically correct on the B5 being from the 1990s but this "1990s" tech is also on a huge numbers of Western planes both civilian and military today.
Click to expand...
It's why looking down on WS-20 is nonsense... maybe not competitive enough for a brand new model of civilian aircraft but for the rest, not a lot of country have designed and put in production an engine of that level.
 
Last edited:
sunnymaxi

sunnymaxi

Major
Registered Member
Alfa_Particle said:
*CFM-56-5B

Next relatively small step is the CJ-1000A, on the same level as the CFM LEAP series.

And the one after that is a giant step, CJ-2000(A?), allegedly on the Rolls Royce Ultrafan level.
Click to expand...
GiantPanda said:
I don't think you can really take a bigger step than the CJ-1000A. This is a civilian TF with all the associated reliability
and performance parameters that must come with a commercial engine.

You do not tackle this unless you are pretty far along the aircraft powerplant technology curve.

And the CJ-1000 is not just some project on paper. It is on a Y-20 flying testbed! Think about that.
Click to expand...
this is going to be lengthy post.. i shall try to clear some doubts about China's Three mainstream high bypass turbofan engine projects.. WS-20/CJ-1000/CJ-2000..

WS-20 time line is very interesting..

first airborne testing took place in 2014. that was the time period when China's material/components level was very backward. first generation single crystal alloy successfully break the deadlock.. and China was struggling with precision in components manufacturing. mechanical failures were very common..

now back to today's time ..

in 2021 Zhuhai air show they showcase the 4th generation single crystal alloy along with powder metallurgy turbine disk..

e50ad287fe8651b5c81154b8fc86fa8cv5.jpg


fggtryt.jpg
AECC confirmed in march, 2023. we have not yet selected the material of WS-20.. i believe material and components have selected now and they have choose the best available option..

my purpose behind this post is, WS-20 indeed based on old engine cycle design. WS-10 and in contrast with CFM. but materials/components and manufacturing techniques available in 2024 is far more superior to what was available back in 90's. its day and night difference..

WS-20 bypass ratio is 6.0 , front fan diameter is 2.1 mm..
-------------------------------------------------------------------------------------------------------

CJ-1000 engine is actually superior to WS-20 in every category. material/components and bypass ratio. CJ-1000A deign and produced by AECC shanghai team with core components have different suppliers as compared to WS-20 and other military engines ...

CJ-1000 engine bypass ratio is 9 or could be 10 with front fan diameter is 2.2 mm. length 5.7m width 2.7m and maximum take off thrust will be 30,000-32,000 lbf.. MBTO , life cycle , durability will be much higher than WS-20 engine..

------------------------------------------------------------------------------------------------------------

CJ-2000 engine will not be equivalent to RR ''ULTRAFAN'' .. just calm down. this is the first time China is handling this kind of heavy thrust civilian engine..

CJ-2000 some available information from AECC -

bypass ratio is 10 plus with front fan diameter is 3+ mm .. length 7m width 3.5m and maximum take off thrust will be 78,000 lbf.

composite casing
full size composite fan blades
integrated manufacturing of large size drum shaft and powder trays
Fourth generation powder alloy high pressure turbine secondary disc tailgate.
 
O

OppositeDay

Senior Member
Registered Member
by78 said:
Does anyone have access to the video? It appears to mention L15/JL-10s are being re-engined with, presumably the indigenous WS-17s.

53561648772_374227e20c_h.jpg
53562702658_2097b24de0_h.jpg
53562953350_7b8d2bfa5c_h.jpg
53562953370_ff75005f48_h.jpg
53561648832_880d81814a_h.jpg
Click to expand...

Should we assume the new engine was WS-17? The show never claimed that the upgraded engine was domestic and I imagine replacing foreign with domestic is something they would emphasize. Could the upgrade be AI-222 with afterburner?
 
Deino

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
OppositeDay said:
Should we assume the new engine was WS-17? The show never claimed that the upgraded engine was domestic and I imagine replacing foreign with domestic is something they would emphasize. Could the upgrade be AI-222 with afterburner?
Click to expand...

no, just look at the nozzles
 
You must log in or register to reply here.
Top