قرأت موضوع في ويكيبيديا يقول ان المقطع الراداري لاف 22 هو واحد على 5 اي 0.2
وقرأت في مصادر كثيرة في المنتدى ان المقطع هو 0.0001

Stealth
The stealth of the F-22 is due to a combination of factors, including the overall shape of the aircraft, the use of radar absorbent material (RAM), and attention to detail such as hinges and pilot helmets that could provide a radar return.^[202] However, reduced radar cross section is one of five facets of presence reduction addressed in the designing of the F-22. The F-22 was designed to disguise its infrared emissions, reducing the threat of infrared homing ("heat seeking") surface-to-air or air-to-air missiles, including its flat thrust vectoring nozzles.^[203] The aircraft was designed to be less visible to the naked eye; radio, heat and noise emissions are equally controlled.^[202]


F-22 with external weapons pylons.
The F-22 reportedly relies less on maintenance-intensive radar absorbent coatings than previous stealth designs like the F-117. These materials are susceptible to adverse weather conditions.^[204] Unlike the B-2, which requires climate-controlled hangars, the F-22 can undergo repairs on the flight line or in a normal hangar.^[204] The F-22 features a Signature Assessment System which delivers warnings when the radar signature is degraded and has necessitated repair.^[204] The exact radar cross section (RCS) remains classified; however, in 2009 Lockheed Martin released information indicating it to have a RCS (from certain angles) of −40 dBsm – the equivalent radar reflection of a "steel marble".^[205] Effectively maintaining the stealth features can decrease the F-22's mission capable rate to 62–70%.^{[N 2]}
The effectiveness of the stealth characteristics is difficult to gauge. The RCS value is a restrictive measurement of the aircraft's frontal or side area from the perspective of a static radar. When an aircraft maneuvers it exposes a completely different set of angles and surface area, potentially increasing visibility. Furthermore, stealth contouring and radar absorbent materials are chiefly effective against high-frequency radars, usually found on other aircraft. Low-frequency radars, employed by weather radars and ground warning stations, are alleged to be less affected by stealth technologies and are thus more capable as detection platforms.^[207][208] Rebecca Grant states that while faint or fleeting radar contacts make defenders aware that a stealth aircraft is present, interception cannot be reliably vectored to attack the aircraft.^[209]
The F-22 also includes measures designed to minimize its detection by infrared, including special paint and active cooling of leading edges to deal with the heat buildup encountered during supercruise flight.^[210]



المصدر en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
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Stealth

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