Chengdu next gen combat aircraft (?J-36) thread

by78

General
I don't believe this has been shared before.

54268959202_9f1a98b556_o.jpg
 

tupolevtu144

Junior Member
Registered Member
A bit more artwork of the J-36 fightercruiser
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View attachment 143638
I have noticed that the exhausts are not ducted and I wonder whether it will cause an increase in radar return signature. The following is a diagram of the ADVENT engine peogram of the USAF, notice how the exhaust is ducted (as well as the inlet) to achieve a minimum amount of rear RCS. Can the J36 also adopt such a design while still using the WS15 interim engine without losing too much thrust?
variablecycle.JPGp20010c31g86001.jpgADVENT-engine.jpeg
 

vincent

Grumpy Old Man
Staff member
Moderator - World Affairs
I have noticed that the exhausts are not ducted and I wonder whether it will cause an increase in radar return signature. The following is a diagram of the ADVENT engine peogram of the USAF, notice how the exhaust is ducted (as well as the inlet) to achieve a minimum amount of rear RCS. Can the J36 also adopt such a design while still using the WS15 interim engine without losing too much thrust?
View attachment 143659View attachment 143660View attachment 143661
I hope you realized now those are artworks…
 

bsdnf

Junior Member
Registered Member
View attachment 143663
With the photo of the rear showing its YF23-ish nozzles it is almost without doubt the exhaust is not ducted.
The chief designer's paper certainly noted the S-bend nozzle and the three-stream flow of the adaptive engine. But, "For non-afterburning subsonic stealth aircraft such as the B-2, the S-bend nozzle has been used; however, the application of the S-bend nozzle in the afterburning engine still faces more complex design issues such as local high temperature areas, performance degradation caused by uneven flow, and fluid-structure coupling under complex combined loads."

This thing either requires a completely new engine design or requires the modification of the existing engine. Who dare to use a new engine on the first flight of a new aircraft? The risk is so high.
 
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