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Bob:<br>
Remember the problems with the B-2B and the "Iron Ball paint? Bill
Glaze<br>
<br>
Bob Richards wrote:<br>
<blockquote cite="mid20041124144807.40545.qmail@web12405.mail.yahoo.com"
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<div>I mentioned that the material used to construct RF shielded
rooms would make a good flat worksurface. Then somebody mentioned
"Faraday cage" -- completely off topic for the group. Funny, though, it
made it back to "don't build a fuselage out of this stuff". </div>
<div> </div>
<div>You mentioned full-sized aircraft fuselages being Faraday cages,
they are to some extent. Not only can the fuse shell keep signals out,
they can also keep signals in. Very high field strengths can be
achieved with very little power, and nodes can exist where reflections
arrive in phase. This is a very big problem, and compliance test
standards (such as DO-160) exist to insure that systems inside an
aircraft don't emit strong signals that can interfere with other
systesms, and can also still operate when interference is present. This
is also why they don't want computers and electronic equipment
operating during the times that the instrumentation is most needed
(takeoff and landing, especially in IFR conditions). </div>
<div> </div>
<div>Bob Richards.</div>
<div><br>
<br>
<b><i><a class="moz-txt-link-abbreviated" href="mailto:Rcmaster199@aol.com">Rcmaster199@aol.com</a></i></b> wrote:</div>
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<div>The tangents that some threads create are often much more
interesting than the original intent of the thread. </div>
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<div>Keith I would say it's not a good idea. If you built a fuse
out of this material, (done everyday BTW), I suggest you build it
large enough to accomodate the person flying it (vbg). I know Bill, Don
Ramsey and Al Glenn and probably several more, flew or still fly
"Faraday Cages" for a living</div>
<div> </div>
<div>Now, how we went from measuring surface flatness to
"shielding" devices from EMI/RFI (regardless of what the emitting
source is), is beyond me</div>
<div> </div>
<div>MattK</div>
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