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A stealth building 400 metres from the runway! In order not to affect Instrument Landing System ( ILS ) radio waves, the construction of buildings alongside runways has hitherto been forbidden. But Airbus and EADS have found the solution, a world first!... This building which houses the assembly line for the A330 is just 380 metres ( 415 yds. ) from the runways. At that distance, it should never have seen the day because a building’s façade behaves like a large mirror; it reflects the radio waves emitted by Instrument Landing Systems ( I.L.S. ) back to the instruments; these antennas at the ends of runways that can guide an aircraft in poor visibility. To avoid all interference, Airbus and EADS Innovation Works have therefore found a solution: these trapezoidal-ribbed aluminum panels 70cm ( 27” ) deep in horizontal cross-section. “If we match the wave crests of one wave with the troughs of a second, and add the two together, they cancel each other out to zero; there is no signal; and this we did here, with what we call: out of phase waves.” And it works! Thanks to this ribbed structure, the waves are bounced back in directions other than those crossing the runway, thus avoiding all interference. And because the radio signals are weak at ground level, only the upper structure has been treated; 600m2 ( 6,458 ft²) in total that open up new horizons. "The prospects are great for all airports equipped with ( ILS ) throughout the world. We'll finally be able to make areas that were previously zoned exclusively for radio signals, now also suitable for building purposes." This patented technology, should make it possible to build new terminals, hotels or maintenance hangars much closer to runways, thus alleviating the problem to 150 airports around the world.
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A stealth building 400 metres from the runway!

22/05/2013

DESCRIPTION : In order not to affect Instrument Landing System (ILS) radio waves, the construction of buildings alongside runways has hitherto been forbidden. But Airbus and EADS have found the solution, a world first !

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