Question

An ever-improving electrical system If you total up all of the wires and cables of all diameters and lengths found in a large airplane, they could stretch for hundreds of miles. The plane also has hundreds of places using alternating and low tension continuous current (115 volts). It is common practice for these generating and distribution systems to maintain a solid energy reserve for peak usage times and unusual circumstances. The kilowatts used on new models cannot be compared to what will be required on board the mega-jets A380 (now going through f1ight testing) and the future A350, plus the Boeing 787 Dreamliner. All of these plan on offering new dimensions inflight entertainment and a Ievel of connectivity that is comparable to what we already have on the ground – for laptops and individualcell phones, broadband internet, e-mail, Wi-Fi (Iong-distance enlacing), and all the rest. In today's wide-body planes, the biggest energy consumer is the heating for de-icing and defrosting the windscreens. But, even after adding in the 16 ovens and coffee machines in the galley, plus the electronic navigation, communications and avionics systems, we will still be well short of the electrical system on board the advanced jets that will go into service between 2006 and 2010. Besides the fact that each of those aircraft will have two (not just one) alternators per engine, there will be other brand-newelectrical applications. The wiring may come with a variety of tensions and frequencies, which will bring a new leveI of freedom to designers who are projecting a much larger, more flexible, more efficient and safer electrical system. Texto by Ernesto Klotzel, Illustration Clayton Jr. icaro. April, 2006.

Answer 1

Resposta:

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Answer 2

Resposta:

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