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

[Totoro]

All these years there has been a single official statement on f22 and f35's rcs and it didn't come from LM but from USAF, back in 2005. It stated, without any context or further clarificiation, that f22's rcs (in unknown conditions) is comparable with a marble and f35 with a golf ball. When one uses metallic balls of those sizes (using most used marble size) one gets 0,00016 m2 for f22 and around 0,0014 for f35.

That may (and probably is) applicable for best angles versus EM bands for which the airplanes' RAmaterials are best suited against. Also, since it was in 2005., it is quite possible that f-35's value was based on the goal for f-35, not actual f-35. Real value may be slightly different.

EVERYTHING else found online is just pure guesswork.

 

[kwaigonegin]

LM actual claim is actually somewhere between 0.0001 and 0.000001 sqm (later figure does seem ridiculous ) for frontal RCS on clean F-22 and X-band .

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hehehe yeah..0.000001 sqm = 1 mm2 which is the size of pencil tip. So if a bird pooped on an F-22, the poop essentially increase it's total RCS by a factor of 100.

 

[chuck731]

hehehe yeah..0.000001 sqm = 1 mm2 which is the size of pencil tip. So if a bird pooped on an F-22, the poop essentially increase it's total RCS by a factor of 100.

That is one fast bird.

What about bug splats on F-22 Canopy, how does that compromise its stealthiness?

 

[Skywatcher]

That is one fast bird.

What about bug splats on F-22 Canopy, how does that compromise its stealthiness?

Well, bugs aren't made out of radar reflective materials, so another centimeter or two won't matter.

I suppose a 0.1m2 figure is possible, but would be something like a rearwards view of the F-22 (reflections off the engine's blades from the rear), thus making it about as useful as someone hoping to get a radar lock from a J-20 or F-35 nozzle in a head on BVRAAM engagement.

 

[thunderchief]

hehehe yeah..0.000001 sqm = 1 mm2 which is the size of pencil tip. So if a bird pooped on an F-22, the poop essentially increase it's total RCS by a factor of 100.

Actually , any amount of dust , dirt , condensed water etc ... could potentially significantly reduce level of stealthiness of F-22 or F-35 . F-22s are kept in special acclimatised hangars , but F-35s on carrier decks would face a lot of problems ...

 

[longmarch]

Hello this is my first post.

This is official:there have been 6 J-20 undergoing flight test （定型试飞）in Yanliang since July,revealed by prof. Li li on CCTV program Focus of Today (今日关注）

Video available at YouTube SGO8ZQBHXlo,from 5:40

I've been watching this forum and surprised that nobody talked about this, thus the registration and post.

 

[Lion]

6 J-20? Goosh. I guess we military watch has been fooled all along.

 

[kwaigonegin]

Hello this is my first post.

This is official:there have been 6 J-20 undergoing flight test （定型试飞）in Yanliang since July,revealed by prof. Li li on CCTV program Focus of Today (今日关注）

Video available at YouTube SGO8ZQBHXlo,from 5:40

I've been watching this forum and surprised that nobody talked about this, thus the registration and post.

which then begs the question where is 2003, 2004 etc or do we have more than one bird with the same number?

 

[perfume]

Hello this is my first post.

This is official:there have been 6 J-20 undergoing flight test （定型试飞）in Yanliang since July,revealed by prof. Li li on CCTV program Focus of Today (今日关注）

Video available at YouTube SGO8ZQBHXlo,from 5:40

I've been watching this forum and surprised that nobody talked about this, thus the registration and post.

Haha you can see her body language change, and just before she says it she stutters. Bet she was thinking to herself: 'wait a minute, was I supposed to say that?'

 

[Engineer]

Just curious Engineer, so how do they do such testings to get an idea or estimation of another stealth plane RCS?

Civilians can do

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Governments can do

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