TerraN_EmpirE
Tyrant King
Rumored, as actual details are thin. Intentionally.
J-20 5th Gen Fighter Thread VI
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Scientifically speaking, what makes a meta-material a meta-material is the use of particularly shaped micro-geometries to create macro-properties, rather than depend (solely) on the inherent properties of material composition. An important thing to remember is that what makes meta-materials so powerful and revolutionary is that their mechanisms operate on a different (larger) size scale from typical material science, and because they draw their properties from geometry and not composition they offer far greater range of freedom for what you can do with materials that would otherwise have fixed properties. They transfer the burden of discovery for effective and useful properties from material to shape, so what ultimately matters with any story about a new meta-material isn’t the category of the material *but* whether some new geometric property was found, and in this case it sounds like it was.
The J-20, we know, is slated to incorporate meta-materials into its design if it doesn't do so already. The F-35, in contrast, is only rumored to employ meta-materials, which may drop its RCS into the -70 dBsm range. Lockheed is known to have its own metamaterial researchers. As to whether the F-35 uses metamaterials, this will only be known / announced once the F-35 is near obsolescence.
Wuhu?
Wuhu?
Yup. 62001 is stationed at Wuhu. @Deino How many J-20s are officially confirmed according to the new serial?
Indeed, if you want only those confirmed by imagery, then this is the best we have. Thanks to @huitong
But I have the feeling that there are already between 8-12 for the 176th and 172nd Brigades each plus at least 4-6 for the 9th Brigade... I however would like to know how many are already built altogether, how many are in preparation to delivery and at what rate they are produced.
And if possible, if the second batch will get the WS-10?
Which definition would that be? A perennial problem in this discussion is that in fact no universally accepted or applicable definition of "metamaterial" exists, it's a relatively recently coined buzz word (dating to 2000 or thereabouts IIRC). Latenlazy's post offers what I'd consider a very good description, and frequency selective surfaces or integrated forebody materials as used by the Eurocanards or F-22 and F-35 meet it exactly. How do you think they achieve their bandpass properties? What do the following look like to you?
Eurofighter Typhoon FSS radome pattern
Sukhoi FSS antenna shroud pattern
Like so many buzz words, there were perfectly valid instances long before the term first appeared - take "SUV", numerous car models meeting every aspect of the definition (such as it is - there isn't really an agreed formula either) of that term were built long before it was coined by Jeep in the mid-1970s. It follows that although you won't find any sources describing the Eurofighter radome FSS as a metamaterial (simply because when it was developed in the late-1980s/early-1990s the term had yet to be invented), it doesn't mean it can't in fact be considered one. If it walks like a duck...
"having a pattern does not equate to meta-material (used by scientific circle)".
There is a definition used by researchers in US, China and Europe as far as I have read their publications. This is the definition that I used, but you apparently disagreed. I respect your holding your disagreement, but I am not interested in continue a debate with you about the definition, because it is neither mine nor yours.
Like or not, agree or not the definition is not my invention, nor for you to redefine in your own thought. Your argumentation is like somebody in the new age trying to redefine an existing and old definition of "marriage".
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