| Boeing had considered larger-capacity versions of the 747 several times. In 2000, Boeing offered the 747X. The 747X would increase the 747’s wingspan to 229 ft (69.8 m) by adding a segment at the root. The 747X was to carry 430 passengers up to 8,700 nmi (16,100 km). However, the 747X family was unable to attract enough interest to enter production. The 747-8 was designed to be the first lengthened 747 to go in to production. Boeing said that the new design would be quieter, more economical, and more environmentally friendly than previous versions of the 747. Production of the first 747-8 Freighter began in Everett in early August 2008.In February 2009, only one airline customer (Lufthansa) had ordered the 747-8I passenger model. On December 4, 2009, Korean Air became the second airline customer for the -8I passenger model.
The 747-8 Intercontinental is stretched 5.6 m (18.3 ft) from the 747-400 to provide 467 seats in a three-class configuration and a 14,815-km (8,000-nmi) range. Using 787-technology engines, the airplane will be quieter and achieve better fuel economy. The 747 Intercontinental will provide nearly equivalent trip costs and 10 percent lower seat-mile costs than the 747-400, plus 28 percent greater cargo volume.
The 747-8 Freighter will be longer than the 747-400F by 5.6 m (18.3 ft) and enjoy a maximum structural payload capability of 140 metric tonnes (154 tons) with a range of 8,275 km (4,475 nmi). Also powered by 787-technology engines, The 747-8 Freighter will have nearly equivalent trip costs and 14 percent lower ton-mile costs than the 747-400, plus 16 percent more revenue cargo volume.The additional 121 cu m (4,225 cu ft) of volume means the airplane can accommodate four additional main-deck pallets and three additional lower-hold pallets.
|Preliminary SPECIFICATIONS B747-8I(Intercontinental) and B747-8F(Freighter)|
|Typical passenger load||Typical 3 classes = 467||———|
|Cargo loading standard||5,705 cu ft (161.5 cu m)||capacity 30,177 cu ft (854.3 cu m)|
|Range||8,000 nautical miles (14,815 km )||4,475 nautical miles (8,275 km)|
|Number of engine||4||4|
|Engine Thrust||66,500 pounds||66,500 pounds|
|Wing span||224 ft 7 in (68.5 m)||224 ft 7 in (68.5 m)|
|Length||250 ft 8 in (76.4 m)||250 ft 8 in (76.4 m)|
|Cruising speed||Mach 0.85||Mach 0.845|
|Max.take off weight||970,000 pounds (439,985 kg)||970,000 pounds (439,985 kg)|
|Max.fuel capacity||64,225 gal (243,120 L)||60,925 gal (230,625 L)|
B747-8I Seat Layout
|1 nm.(nautical mile) = 1.15155 miles, 1 kt (knot) = 1.15155 mile / hr.
1 mach = 761 mph.(SL,ISA)