Could Russia Shoot Down an F-22 Stealth Fighter Over Syria?

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“Operators of Russian air defense systems won’t have time to identify the origin of air strikes, and the response will be immediate. Any illusions about ‘invisible’ jets will inevitably be crushed by disappointing reality.”
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While Moscow makes bold claims about the counter-stealth capabilities of its S-400 and S-300V4 missiles, the fact remains that even if Russian low-frequency search and acquisition radars can detect and track tactical fighter-sized stealth aircraft such as the F-22 or F-35, fire control radars operating in C, X and Ku bands cannot paint low observable jets except at very close ranges.
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For sure, tactical fighter-sized stealth aircraft must be optimized to defeat higher-frequency bands such the C, X and Ku bands — that’s just a simple matter of physics. There is a “step change” in an L.O. aircraft’s signature once the frequency wavelength exceeds a certain threshold and causes a resonant effect.
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Typically, that resonance occurs when a feature on an aircraft — such as a tail-fin or similar — is less than eight times the size of a particular frequency wavelength.
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As a result, fighter-sized stealth aircraft that do not have the size or weight allowances for two feet or more of radar absorbent material coatings on every surface are forced to make trades as to which frequency bands they are optimized for.
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But at the UHF and VHF band wavelengths, designers are not trying to make the aircraft invisible. Rather, engineers hope to create a radar cross-section that will blend in with the background noise inherent to low-frequency radars.
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“Stealth is ‘delayed detection’ and that delay is getting shorter. [Surface-to-air missile] radars are shifting their frequencies into lower frequency bands where U.S. stealth is less effective,”
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“Early warning radars are in the VHF spectrum where stealth has limited if any capability. These radars are networked into the SAM radars, giving the SAM radars cued search.”
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However, low-frequency radars do not themselves provide a “weapons quality” track that is needed to guide a missile onto a target. There are various proposed techniques to use low frequency radars for such purposes, but none of those are likely to prove viable.
War is boring
Oct 10 2016, 02:30 PM
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