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Join date : 2011-06-10
|Subject: among the fastest Wed Jul 20, 2011 1:40 pm|| |
Boeing did so because the company expected supersonic airliners (whose development was announced in the early 1960s) to render the 747 and other subsonic airliners obsolete, while believing that the demand for subsonic cargo aircraft would be robust into the future. The 747 in particular was expected to become obsolete after 400 were sold but it exceeded its critics' expectations with production passing the 1,000 mark in 1993. As of June 2010, 1,418 aircraft have been built, with 109 more in various configurations remaining on order.
The 747–400, the latest version in service, is among the fastest airliners in service with a high-subsonic cruise speed of Mach 0.85–0.855 (up to 570 mph, 920 km/h). It has an intercontinental range of 7,260 nautical miles (8,350 mi or 13,450 km). The 747-400 passenger version can accommodate 416 passengers in a typical three-class layout or 524 passengers in a typical two-class layout. The newest version of the aircraft, the 747–8, is in production and flight testing in late 2010. Deliveries of the 747-8F freighter version are scheduled to begin in mid-2011, with the 747-8I passenger version to follow in late 2011. The 747 is to be replaced by the Boeing Y3 (part of the Boeing Yellowstone Project) in the future.[11tyverialarmbest article writing service