09/06/08 23:00:03
Flightglobalの見る、Paris Air Showを目前にした787の長く苦しい物語。
PARIS AIR SHOW: Realising the 787 dream
URLﾘﾝｸ(www.flightglobal.com)
長文は各自読んでいただくとして、目に付いたセンテンスから
(前略)
Aircraft seven will be the first to incorporate significant weight reduction into the design. Most of the changes focus on removing weight from the wing. A second early blockpoint change is planned around aircraft
20 that will feature "broader weight improvements, including wiring", says Fancher.
(中略)
Programme sources indicate that many of the full-scale structure tests Boeing has conducted revealed significant structural over-engineering, with some areas exceeding twice the required strength for certification.
(中略)
"In the long run, this will be an excellent aircraft," said Steven Udvar-Hazy, chief executive of Boeing's largest customer, International Lease Finance, in March. "But I pity the airlines that get the first ones.
Obviously those aircraft will not be the same standard as those 787s later on."
(後略)
つまり、787の根本的な問題は重量超過なのだが、これは複合材の強度マージンを取りすぎてしまったことによる。
多くの部位で所要強度の200%オーバーが発覚。確かに重量削減の余地は大きいが、時間も手間もかかる。
7号機では翼関係から重量削減に手をつけてあるが、本格的な対策は最初の20機には間に合わない。
また、お前んとこの部位か。
世界中に恥曝してんじゃねえよ。