Thursday, April 20, 2017

Boeing elaborates on 777-9 design details

(Boeing)

Boeing has published further preliminary details of the 777-9’s configuration, three years ahead of entry into service, revealing a slightly lower aircraft with an interior re-sculpted to carve out a precious 10.2cm (4in) of internal diameter.

A 79-page document posted on Boeing’s website offers the first detailed update on the larger 777X variant's dimensions since a brochure version appeared in 2015.

Boeing released both documents to help airport managers prepare for the arrival of the stretched wide-body with its extended wingspan.

Compared with the previous iteration, the update shows the 777-9’s designers have made a few minor tweaks. For example, the height of the vertical tail above the runway is about 17cm shorter, although remains nearly 1m taller than the height of the 777-300ER.

The most critical dimensions for the 777-9 remain unchanged, with a 2.9m-longer fuselage and 7m-wider unfolded wingspan compared with the 777-300ER.

The folded wingspan of the 777-9 measures 64.82m, about 2.54cm wider than the 777-300ER.

Boeing also has worked to make the 777-9 more comfortable with a standard 10-abreast layout in economy class. The 777-300ER originally entered service with a nine-abreast economy cabin, but some airlines now offer 10-abreast layouts. The 777-9 shares an external fuselage cross-section with the 777-300ER, but the internal sidewalls have been carved out by about 10.2cm.


Asset Image
(Boeing (777 airplane characteristics for airport planning document)

Boeing now lists the 777-9’s standard two-class cabin as accommodating 414 passengers, with a three-class cabin holding 349 seats.

The 777-9 is designed to fly with 7% greater useable fuel capacity than the 777-300ER, the document shows.


(Stephen Trimble - FlightGlobal News)

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