Nice work finding actual values, but still, is it enough to compensate for the beam aspect shaping issues? The answer is “most likely not”, and shape is still paramount to stealth.
Below is an lower hemisphere RCS simulation of two 50cm axial coss sections including the problem child inner nacelle and the rear engine section with its poorly angled cylindrical outer surface. Both tests done at 10GHz and models are to scale.
The red areas signify where stealth is most important to remain hidden from radars at an operationally significant range.
Unfortunately, other stealth aircraft cross sections I simulated (F-22, F-35, J-20, J-31) using exactly the same conditions came back with an RCS -20 or -30 dBsm smaller.
With knowledge of this material’s capability I can now see how people can say the F-35 is all aspect stealth, but the PAK FA is still at risk of being tracked by radars out to around 190km for minutes at a time. I copped some stick for predicting it is a defensive, denial of access only fighter, but it’s looking more and more likely.
Before anyone says it (cookie for the first “genius” to complain about it), no, the inner surface join on the 3d shape is not exactly the same as the real deal, but that’s irrelavent as the outer surface is the problem.
wouldn’t your model have increased figures due to edge defraction at the edges of the section?
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