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

[FairAndUnbiased]

but that's the thing, since it has no tail, its control surfaces for yaw are next to none, so I'm saying it needs horizontal TVC for it. Maybe a gyroscope could also work

aren't ailerons a major contributor to yaw control, not just the rudder?

 

[Sleepyjam]

Differential thrust control bandwidth is too low for maneuvering, trim maybe

B2 uses it for maneuvering

but that's the thing, since it has no tail, its control surfaces for yaw are next to none, so I'm saying it needs horizontal TVC for it. Maybe a gyroscope could also work

Split aileron/rudders plus differential thrust

 

[Mearex]

aren't ailerons a major contributor to yaw control, not just the rudder?

I assume you are talking about the split ailerons. That was the air brakes I was talking about

 

[Mearex]

B2 uses it for maneuvering

Split aileron/rudders plus differential thrust

I don't know if those 2 alone are sufficient. The split ailerons are tiny and as I mentioned previously differential thrust loses total thrust and the engines aren't that far apart. B2 gets away with it because its engines actually have some space between them

 

[Nx4eu]

Will the dorsal intake pose a threat to the pilot(s) if they are ejecting from the aircraft?

No

 

[iewgnem]

B2 uses it for maneuvering

B2's manuvering bandwidth requirement isn't exactly comparable to J-36.

 

[Sleepyjam]

I don't know if those 2 alone are sufficient. The split ailerons are tiny and as I mentioned previously differential thrust loses total thrust and the engines aren't that far apart. B2 gets away with it because its engines actually have some space between them

Not that tiny when compared to the overall size and B2 is a much larger and heavier plane. Its engines aren’t that far apart either, right beside the fuselage. Also at supersonic speeds the required movement is much less than at subsonic speed.

 

[kurutoga]

There's some rumor on Reddit that there's growing consensus within US defense establishment about merging F/A-XX and NGAD and abandon the full sized NGAD, this means their incoming NGAD might be closer to Shenyang's J-XDS instead of J-36 . The role of long range missile carrier might be given to B-21 instead. If this is true that means China might ends be the only country operating full sized NGAD in foreseeable future. This might beg question whether US' smaller NGAD and B-21 could take over the UCAV management role that full sized NGAD supposed to do.

Wouldn't the new President and the new Defense Minister the final decision makers? To patrol between Hawaii and the edge of Greenland requires a very long range plane.

 

[iewgnem]

aren't ailerons a major contributor to yaw control, not just the rudder?

In a way, symetrical aileron deflection usually create adverse yaw, i.e. down-going aileron increase lift coefficient, increase drag and cause yaw in opposite direction you want for a turn. You can eliminate the effect with asymmetrical deflection, i.e. only actuating the up-going aileron.

But I wouldn't call it yaw control, more like it can affect yaw when banking and can be actuated in a way to reduce amount of yaw control needed. Typically high bandwidth yaw control is basically split rudders or thrust vectoring, differential thrust can provide low bandwidth yaw trimming.

Having said that J-36 probably employ more advanced / exotic control schemes, since at supersonic speeds split rudder deflection will alter shock location causing left/right lift asymmetry and adverse roll. My guess is it uses some kind of flow redirection and/or advanced shock/pressure control algorithm which is why it has so many small control surfaces.

 

[Sleepyjam]

B2's manuvering bandwidth requirement isn't exactly comparable to J-36.

So what are their requirements?