Russia experts estimate F-22 RCS at 0.3 m^2 and Su-57 RCS at 0.35 m^2. Fairly realistic numbers.

[BringHarmony]

That is for a perfectly conducting sphere. It don't exist in this universe.

*Ahem* Do you know the concept of significant places in measurements? Thats like.... high school physics.

Let me put it in this way...

If someone asks you your weight in KG, say your gym coach or your doctor, will you say that you cann't measure your weight because a perfect copy of international prototype kilogram (https://en.wikipedia.org/wiki/Kilogram) kept in France is not possible due to No Cloning Quantum physics theorem? You will rather step on a scale and it say 81.32 KG, for instance. You will say, "Doc, it is 81.32 right now".

 

[gambit]

That is for a perfectly conducting sphere. It don't exist in this universe.

Mr. Harmony is correct -- you do not know what you are talking about.

A perfectly shaped and perfectly conducting sphere is not required for the sphere to be a reference shape. The radar cross section (RCS) is not a 'flawed concept'. If anything that is truly flawed, it is your being on this forum.

*Ahem* Do you know the concept of significant places in measurements? Thats like.... high school physics.

Him finished high school is being too generous.