Chinese Engine Development

A

antiterror13

Brigadier
Tomboy said:
And they stopped building that in 1999 after just 5 years from prototype and instead choose to build the R-99 based on the ERJ-145 regional jets and now are moving on to the larger GlobalEye based on Global 6000. It really is more of an outlier than the norm.
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If you think so, so be it :) we just agree to disagree

I believe China will continue building KJ-700 (and potentially a new one based on Y-15) and also at the same time ramping up building KJ-3000, they are compliment each other (I am fine if you disagree)
 
sunnymaxi

sunnymaxi

Colonel
Registered Member
Alfa_Particle said:
Kind of an old rumour (weeks old) but "CJ5000" apparently exists according to someone with ACAE, currently at the preliminary research phase. Aiming to compete with the GE90 in terms of rated thrust.
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HOLY :oops:

While the GE9X (its successor) holds the record for highest thrust (134,300 lbf), it is currently rated at 110,000 lbf, meaning the GE90-115B retains a higher operational thrust.
 
tphuang

tphuang

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Take this for what you will, but CJ-1000A apparently has finished full environmental testing and have now accumulated 6142 hours of this testing in highland icing and bird strike and other scenarios. It is estimated to get CAAC type certificate in Q2 of this year and first will be installed in Q3.

I'm not sure who originally published this story. Could be made up.
 
Alfa_Particle

Alfa_Particle

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tphuang said:
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Take this for what you will, but CJ-1000A apparently has finished full environmental testing and have now accumulated 6142 hours of this testing in highland icing and bird strike and other scenarios. It is estimated to get CAAC type certificate in Q2 of this year and first will be installed in Q3.

I'm not sure who originally published this story. Could be made up.
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Pretty similar to this table I found with unknown sources. Again, could be made up.

However. I do know FOR SURE the CJ1kA is indeed more fuel efficient than the LEAP-1C by a few % after a couple of design changes. Extent unknown.
1769012208359.jpg

Google translate:
Screenshot_20260122_191553_com_google_android_googlequicksearchbox_LensExportedAct.jpg
 
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pipaster

Junior Member
Registered Member
Alfa_Particle said:
Pretty similar to this table I found with unknown sources. Again, could be made up.

However. I do know FOR SURE the CJ1kA is indeed more fuel efficient than the LEAP-1C by a few % after a couple of design changes. Extent unknown.
View attachment 168481

Google translate:
View attachment 168484
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From this side it is claimed that the CJ1000 is 7% more efficient (in what regime) than the Leap-1C. How much less efficient was the 1C to the 1A/B?
 
tphuang

tphuang

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latenlazy said:
Why would the 1C be less efficient than the 1A/B when they’re basically the same engine?
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well, they are not exactly the same engine if you look at the dimensions. Difference between A and B are actually kind of significant. IIRC, Leap-1B had some issues initially due to the smaller diameter and the higher technological requirement.

From that perspective, it wouldn't surprise me at all if CJ-1000A is more efficient than 1C, since it's a clean sheet design with entirely C919 in mind.
 
L

latenlazy

Brigadier
tphuang said:
well, they are not exactly the same engine if you look at the dimensions. Difference between A and B are actually kind of significant. IIRC, Leap-1B had some issues initially due to the smaller diameter and the higher technological requirement.

From that perspective, it wouldn't surprise me at all if CJ-1000A is more efficient than 1C, since it's a clean sheet design with entirely C919 in mind.
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1B had what you call “unique circumstances”.
 
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