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Aviation History
2001
2001 - 3621.PDF
A different challenge applies to balanc ing the demands of in-flight entertainment and onboard ambience. Explosions in movies played back on digital versatile disk (DVD) video systems, relayed via seven sur round sound speakers can reach decibel levels verging on the pain threshold. The problem is the ambient noise inside aircraft - dialogue has to be audible above the 70dB of a BBJ, but a car chase, say, would deafen. Lufthansa Technik is working on a sys tem to reduce the difference between these two extremes, and Boeing says noise- reduction techniques could lower noise to 52dB. Jet Aviation believes the solution lies in active noise cancellation, involving a 180° shift in frequency emission. This is being trialled in smaller aircraft. Quality of life, or "wellness" control is a prime factor in completions: customers want to control temperature and humidity in multiple zones of an aircraft. Project management This requires a massive change in the way interiors are engineered, and are typical of the kind of problem-solving that plays part of the initial design phase. Perhaps the most significant factor in reducing downtime and increasing pro ductivity has been project management. "When centres were only completing one or two aircraft, the teams just worked until the jobs were done. These days, projects are tracked backwards from delivery date The Boeing with all key milestones marked," says Business Robinson. He points to the creation of ded- Jet has icated project management teams and the opened up use of project management software as the examples of how seriously internal dead- expanding lines are taken. completion As part of this project management, centre most centres, led by Ozark Aircraft market Systems, based in Bentonville, Arkansas, use three-dimensional computer models and plywood mock-ups are being increas ingly used to identify design challenges and to prevent customers changing their minds close to delivery. This also gives engineers a headstart on the certification of more unusual requests. The tale that www.flightinternational.com FLIGHT INTERNATIONAL 13-19 NOVEMBER 2001 51
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