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The U.S. Air Force, in it’s effort to get money to build more F-22s, has revealed just how “stealthy” the F-22 is. It’s RCS (Radar Cross Section) is the equivalent, for a radar, to a metal marble. The less stealthy (and much cheaper) F-35, is equal to a metal golf ball. The F-35 stealthiness is a bit better than the B-2 bomber, which, in turn, was twice as good as that on the even older F-117. Much older aircraft, like the B-52, have a huge RCS, which makes them very easy to spot on radar. But with a smaller RCS, it's more likely that the aircraft won't be detected at all.
F-22 Stealth Ability Revealed by USAF
The range of the diameter for glassy marbles is from 12mm to 42mm, and according to the formula, the range of cross resection area for glassy marbles could be from 0.0001m2 to 0.0014m2..........
As for the marbles with the most common size (14.4mm and 16mm in diameter), their cross resection area shall be 0.00016m2 and 0.0002m2.....
The standard golf ball today is 1.68 inch (4.2672 cm) in diameter.
According to formula, its cross resection area shall be around 0.00143m2, which is about 7~9 times bigger than the minimal frontal RCS of F/A-22, but 1/35~1/70 of the frontal RCS of the western NG LO-fighters such as EF-2000, Rafale, F/A-18E/F, and so on.
toan's reply to the topic of "F-22 and F-35 RCS revealed by USAF."
* Radar signature approximately the size of a bumblebee, thereby avoiding detection by the most sophisticated enemy air defense systems
* Signatures/emissions of sound, turbulence, and heat that can aid detection are reduced
* Requires no direct assistance from electronic support aircraft that may be more easily detected
* Includes planform alignment of the wing and tail edges, radar-absorbing sawtoothed surfaces, an engine face that is concealed by a serpentine inlet duct, "stealthy" coating cockpit design to minimize the usually substantial radar return of pilot’s helmet
* Through internal weapons placement, the F-22 eliminates multiple surface features that could be detected by enemy radar
well im going to have to disagree although it can vary a lot by frequency the F/A 22 is designed for all aspect wideband stealth so it can maintain its signature over a wide range of frequencies.
Originally posted by planeman
kilcoo hit the nail on the head. 99% of RCS figures published are at best misleading, particularly when people try to make comparisons. RCS vary depending on the angle, aircraft configuration, wavelength of the radar etc.
The F-22 is stealthy and generally speaking has a very low RCS compared to normal fighters.
The F-22 primarliy uses its shape to deflect radar. It does use some RAM as well but far less than might be expected. And it uses a minimum amount of radar transparent materials (radome would be an obvious exception).