J-20 5th Gen Fighter Thread IV (Closed to posting)

[Blitzo]

Actually I don't think it is. I believe the side looking EODAS aperture is on both sides of the nose.

That thing the arrow indicates fits the proportions of a datalink or RWR better IMHO

 

[Cyclist]

The plane is very cool-looking, but why does it still need parachute for landing? Is it necessary?

 

[Blitzo]

The plane is very cool-looking, but why does it still need parachute for landing? Is it necessary?

If we can compare various factors like landing distance, stress on airframe, sortie rate, practicality, for using the drag chute and not using it, I expect we'd find there to be a noticeable difference favouring the use of a drag chute for their current purposes.

 

[latenlazy]

The plane is very cool-looking, but why does it still need parachute for landing? Is it necessary?

Less maintenance.

 

[latenlazy]

Actually the canard appear to be of equal or greater area than the all flying verticle stabs, now if you include the area of the vents, ah Ok, but you really must consider them as separate surfaces, as the vents are fixed, and the verts are all flying. The canards on the J-20 are also all flying and may be more effective at pitch control than the elevons or ruddervators. In any regard the canards, ruddervators, and elevons and flaperons, all participate in direct pitch control, so without any doubt the J-20 will have lots of "pitch authority". I think no-name is right, the canards have more surface area than the vertical stabs, but there will be no doubt that the FCS of the J-20 is very complex and effective, all by design as Dr. Song intended the J-20 to have lots of pitch authority, with or with-out OVT, and he himself commented on the very high level of complexity of the FCS.

With regards to the size of the canards and stabs, basic logic tells us otherwise. We can clearly see from the frontal view that the span of the stabs are greater than the span of the canards, and that the canards and stabs are relatively the same in terms of length (though the stabs look a bit longer to me). It is thus mathematically impossible for the canards to have greater area than the stabs.

 

[Quickie]

The J-20 picture is a bit distorted. The left vertical stabilizer can be seen to be smaller than the right one by quite a bit.

 

[Air Force Brat]

True, but even from this angle it's still look pretty big even when the V-tails in the foreground and the canards in the background.

It is clear from this shot that the canard are very large and of a comparable size to the all flying vertical tails, unless you have the engineering data, I doubt you nor I will ever know what the area of each of these surfaces are in actuality????? I do not have access, my point being that the large canard is very effective, and has great pitch authority in and of itself. The Verts are deliberately angled and smaller as are the verts on the F-22 and Pak-Fa, in order to reduce RCS, the J-20 having vents in addition, to achieve enough longitudinal stability, particularly at very high AOA........

I know you guys are sensitive about the size of your canards????? what, afraid somebody's gonna say they're draggy????? increase your RCS???? that's not my point or my concern, really, they are large and effective, that is MY POINT.....that's all....... brat

 

[SamuraiBlue]

True, but even from this angle it's still look pretty big even when the V-tails in the foreground and the canards in the background.

My question would be, why does it have such a large attack angle?
In flight there is no way those canards are going to be pushed into those angles so why are they so maneuverable, are they going to use it as an air brake or something?

 

[Jeff Head]

Sorry for the O/T, but for those interested, I just finished my 1/72 scale Russian Sukhoi PAK FA 5th generation stealth fighter in 1/72 scale. The model is by the Russian company Zvazda and is a decent kit. Realitvely easy to build, but nicely done.

Here is the Thread on SD about the build.

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Interesting to compare that angle to the J-20 1/72 scale frontal shot:

PLAAF J-20 in 1/72 Scale

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Here are several more pictures of the 1/72 scale PAK FA. it is interesting to note the differences the two companies/nations took in creating their 5th generation stealth aircraft.

The Russian PAK FA 5th Generation Stealth Fighter Prototype in 1/72 scale
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[latenlazy]

I know you guys are sensitive about the size of your canards????? what, afraid somebody's gonna say they're draggy????? increase your RCS???? that's not my point or my concern, really, they are large and effective, that is MY POINT.....that's all....... brat

I have no other reason for pointing out that the canards are not as large as the vertical stabilizers other than as a point of fact.