Chinese Engine Development

minusone

Junior Member
Registered Member
Really can’t emphasize enough how pointless it is to go for much worse backup engines for a commercial product…certifying safety and then persuading customers to take the hit on operating costs when they could just get more A320s and 737s is far more trouble than it’s worth. You’re better off sinking that lost value into faster testing for the CJ-1000. The only scenario which this makes sense is if they ban A320s and 737s and Chinese commercial airliners literally have no choice but to buy C919s, and only if the turnaround time is so long that domestic civilian airliners can’t afford to wait.
Maybe because it's not much worse than CJ1000a (with unknown supplier status).

There's so many hype about CJ1000a, 1 thing for sure, the chinese authorities would never hesitate to cut losses on deficit product.

For all we know, AEF1300 is 100 % domestic for sure.
 
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latenlazy

Brigadier
Maybe because it's not much worse than CJ1000a (with unknown supplier status).

There's so many hype about CJ1000a, 1 thing for sure, the chinese authorities would never hesitate to cut losses on deficit product.

For all we know, AEF1300 is 100 % domestic for sure.
China doesn’t get the final say for a commercial product. The customers of the product does. WS-20 has a bypass ratio of 6. The CJ-1000 should have a bypass ratio of 10-11. For commercial aviation specs these are worlds apart. The WS-20 would have been competitive for commercial aviation 20 years ago but not today.
 

sunnymaxi

Major
Registered Member
Problem is, what is the current progress of AEF1300? Can it step in to replace CJ1000A in case the later stumbles into developmental roadblock before being ready for commercial service?
AEF-1300 is basically WS-20's advance form bro. they just replaced components and increase the bypass ratio. WS-20 itself is very mature platform coz of WS-10..

AEF-1300 will not replace CJ-1000A. coz CJ-1000A is just few years away from small scale production. AECC tested this engine on ground countless time. after full satisfaction they started airborne testing. this is final testing and probably will take 2 to 3 years. if everything goes well.
 

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
AEF-1300 is basically WS-20's advance form bro. they just replaced components and increase the bypass ratio. WS-20 itself is very mature platform coz of WS-10..

AEF-1300 will not replace CJ-1000A. coz CJ-1000A is just few years away from small scale production. AECC tested this engine on ground countless time. after full satisfaction they started airborne testing. this is final testing and probably will take 2 to 3 years. if everything goes well.


Are you sure the AEF-1300 has a higher bypass ratio than the WS-20?
 

sunnymaxi

Major
Registered Member
Are you sure the AEF-1300 has a higher bypass ratio than the WS-20?
to be very honest. nope. not 100 percent sure. only speculation

WS-20 has only 6 bypass ratio. AEF-1300 is for civilian purpose so definitely engine have higher bypass ratio than WS-20

AECC statement about engine during Zhuhai air show ;-

'this is high-thrust, low-fuel consumption, high-bypass ratio twin-rotor turbofan engine AEF1300'
 

minusone

Junior Member
Registered Member
China doesn’t get the final say for a commercial product. The customers of the product does. WS-20 has a bypass ratio of 6. The CJ-1000 should have a bypass ratio of 10-11. For commercial aviation specs these are worlds apart. The WS-20 would have been competitive for commercial aviation 20 years ago but not today.

Do you have proof that backs your claim that AEF1300's BPR = 6?
The china officials will always get the final say on which products to opt for, the customers are also state owned airlines, so yeah, they get the final say. Given their track records of being super conservative, i highly doubt they would've opted for AEF1300 if it's not gonna offer anything positive in return.

Which brings us back to CJ1000a 's unknown supplier status. So far, we only have rumours denying the foreign suppliers involvement.
If like you said AEF1300 is a joke, the only reason for its greenlight status can only be CJ1000a is even worst/CJ1000a has US-sanctionable parts in it.

Also, im not sure why yall think CJ1000a is ahead of AEF1300 in terms of progress, if, as alleged ws20=aef1300, its progress will only be much more advanced than CJ1000a who just made its appearance on Y20-based testbed, whereas WS-20 had been flying on Y20 since 2020?
 
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