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Re: Stealth
Posted:
Mar 3, 1995 4:11 AM


The bouy thingies are corner reflectors, they reflect the radar directly back at the source. Exactly the same as the pattern on plastic bicycle reflectors, except for the size. If you look at a stelthy aircraft, the interior angles are all greater than 90 degrees. The stealth shape reflects only once rather than the three that happen inside the corner reflector.
Old time clothing store mirrors were a two dimensional version of the same thing. They reflected back to the source in two dimensions, but not up and down. Imagine a clothing mirror with a reflective floor and ceiling.  Note follows  Subject: Re: Stealth ... because it has flat surfaces rather than curved ones. Living in Boeingland (as Jim King points out) we are exposed to things that fly. But we are also exposed to things that swim. One every navigational bouey and nearly every boat that floats around in Puget sound there is a metal octahedron. Now these are no ordinary octahedra because they do not contain the usual triangular faces. Instead they contain the 3 diametrical squares. In an xyzcoordinate system with the origin at the center of the octahedron the squares are on the 3 coordinate planes (xy xz and yzplanes). I once asked what these were for, and was told that they were for radar. Apparently they show up very sharply on radar. ...



