Y-20 is a bigger plane (more fuel) and 4 engines=each one can operate at greater efficiency points
Chinese Engine Development
- Thread starter jackbh
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duncanidaho
Junior Member
Y-20 is a bigger plane (more fuel) and 4 engines=each one can operate at greater efficiency points
I think the question should be, for what purpose plaaf/planaf will use the C-919. If they will use it in an comparable role to the Boeing P-8, WS-20 should be suitable.
Yes, that alone would invalidate this article. What's interesting is that WS-18's flight testing was so much shorter than that of WS-20. WS-20 on testbed is still going even though WS-18 started later and is already finished. Of course, WS-20 is a new engine whereas WS-18 is a domestic version of D-30KP2. Still, I think that WS-20 has been flying for a while, so I would not be surprised if flight testing can be done sometimes this year. Then, the question is how long it takes them to mass produce it after. At least the first batch of production Y-20 should still be using D-30/WS-18.
A couple of problems here. One, there won't be a military version of C919. Other than the issue of foreign suppliers, have you seen military versions of A320 or B737? Y20/IL76 is a lot larger.
Secondly, fuel consumption rate of something like WS-20 is much higher than CFM-56 series. One good place to start is look at bypass ratio for fuel consumption. Of course, WS-20 is also not designed to pass the stringent noise/environmental regulations. Of course, CFM-56 would not be available, so that's why AVICEngine is working with MTU to develop SF-A . There is also the so called WS-118, which I'm not sure about the current status.
What other choice do they have? D-30KP2/WS-18 is really old technology that they have to rely on until WS-20 becomes possible. The only other option is PS-90A, which they don't have control over and is about comparable performance to WS-20. Since WS-20 is almost ready, there is no sense buying PS-90A.
Until domestic SF-A becomes available, WS-20 is actually not a bad option.
I agree with a different framing of the question. That said, my original point about thrust not being the only consideration isn't wrong.
Thats debateable,right?
Yes, the 737 wedgetail and p8
Much higher or just higher?
Do you have measurements for the bypass ratio of the ws-20?
The huge advantage the C919 would have over equivalent prop driven planes is that it is much faster and consequently much safer when it comes to evading enemy aircraft.
This leads to another advantage for awacs planes, they can get closer to enemy aircraft and get better radar images or alternatively jam the opponents radar better.
That hardly matters with the state of a2a power these days. All multiplier assets need escorts now.
It matters to the awacs crew if they can outrun the opposition.
A C919 is not outrunning a fighter at any point, ever. ESPECIALLY not with an AWACS strapped on it.
Chinese company well ahead of the rest of the world in meta materials and simulation development.
The KuangChi Science investment agreement not only brings significant capital to drive forward the commercialisation of the Martin Jetpack, it also introduces a whole new R&D world of meta-material technology and advanced simulation testing that enables product development that in our opinion is well beyond the capabilities of even some of the world's best aircraft manufacturers," Mr Corker said.
The KuangChi Science investment agreement not only brings significant capital to drive forward the commercialisation of the Martin Jetpack, it also introduces a whole new R&D world of meta-material technology and advanced simulation testing that enables product development that in our opinion is well beyond the capabilities of even some of the world's best aircraft manufacturers," Mr Corker said.