Gomig-21 wrote:Russia’s Su-57 “stealth” fighter has a radar cross section comparable to clean F/A-18 Super Hornet, and around a thousand times bigger than F-35.
This BS has already been refuted here:https://www.russiadefence.net/t4799p225-su-35-vs-f-22-f-35
Now go back and show this uninformed idiot that he doesn't know the BASICS about RCS.
Just tell him to look at the surface area of the vertical tails on the Super Hornet, and F-22, and the Su-57.
Which ones are largest, and which ones should show up more on radar. Uh?
Also tell him to consider that next time he hears the claim that the Su-57 only has frontal aspect stealth.
With those huge tails on the other aircraft, which ones does he think will show up more on radar looking sideways at it?
As for the S-ducts, it is like I said, and like the guy on Millenium7 said, the damned things make the aircraft fatter, you get larger frontal area, thus worse drag coefficient, and it kills aircraft top speed and acceleration. You are basically flying a brick at that point.
In addition, because of all the gymnastics the air flow to the engine has to do with the S-duct, you get worse air flow to the engine, and even less performance. That and the fixed inlets are why the F-35 cannot supercruise and it cannot reach Mach 2. It is a piece of crap aerodynamically. It is a flying brick.
The Su-57 uses a smoother S-duct, with less of a bend, it achieves some reduction of frontal engine profile, without killing performance too much, so it can go over Mach 2, and it can supercruise, even with the first stage engines. The engines also have a radar blocker in the intake to reduce RCS. Finally it can apply the engine mesh screens to further reduce radar profile of the engine in case you need to, at cost of speed, and the second stage engine will have composite fan blades, and treatments to reduce RCS of the engine in the frontal aspect even without the mesh screens being engaged or without having S-ducts.