Photo by Peter Eliasson  #avgeek    

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Sukhoi PAK FA, (T-50)
MAKS 2015

The T-50’s design emphasizes frontal stealth, with RCS-reducing features most apparent in the forward hemisphere; the shaping of the aft fuselage is much less optimized for radar stealth compared to the F-22. The combined effect of airframe shape and RAM of the production aircraft is estimated to have reduced the aircraft’s RCS to a value thirty times smaller than that of the Su-27. Sukhoi’s patent of the T-50’s stealth features cites an average RCS of the aircraft of approximately 0.1-1 square meters. However, like other stealth fighters, the T-50’s low observability measures are chiefly effective against high frequency (between 3 and 30 GHz) radars, usually found on other aircraft. The effects of Rayleigh scattering and resonance mean that low-frequency radars, employed by weather radars and early-warning radars are more likely to detect the T-50 due to its physical size. However, such radars are also large, susceptible to clutter, and are less precise.

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