J-20 5th Generation Fighter VII

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caohailiang

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Scchwerter_ said:
Well it’s a brand new airframe with new design changes. Only makes sense to fit it with existing and proven power plants to reduce risks. Testing new engines is usually a job left to dedicated testbeds, so the way I see it CAC’s mounting ws10 on this new jet because that’s what they have available and what can actually be used in production right now.

edit: if they’re changing this much it makes sense for this new design to be “for ws15”. However since ws15 as far as we know is still undergoing testing and not near production, it also makes sense for them to go forward with the design changes and stick ws10 on there for the time being while they wait for ws15 to enter production.
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which means in short future there could be a 2061 to integrate all these changes in airframe and power plant?
 
by78

by78

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minusone said:
I share the same thoughts....im not buying the whole drag performance improvisation with a back hump ROFL. Both F35 and J35 did it mainly because for extended combat radius, and they need to maximize all the internal fuel storage capacity to achieve that.
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Scchwerter_ said:
Can’t speak for F35 but J-35’s spine change is at least in a large part due to aerodynamic gains. Last summer there was a paper that talked about the aerodynamic changes on the J35 in some detail, and regarding the spine it did say that drag reduction by filling up low-pressure areas is the main cause for the design change.

Check here (J-XY - maybe J-35 - next generation carrier-borne fighter) for the paper in question, part 3.1 is about the canopy redesign.
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No, as @Scchwerter said, the hump was there to reduce transonic drag, so as to give it better acceleration in the transonic regime, which is crucial for a fighter aircraft. Extra fuel wasn't mentioned as a rationale in the paper by SAC designers.
 
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