Hérna er smá fróðleikur um B-747 (því miður á ensku)

Parts
· A 747-400 has six million parts, half of which are fasteners.
· A 747-400 has 171 miles (274 km) of wiring and 5 miles (8 km) of tubing.
· A 747-400 consists of 147,000 pounds (66,150 kg) of high-strength aluminum.
· The 747-400 has 16 main landing gear tires and two nose landing gear tires.
· The 747-400 tail height is 63 feet 8 inches (19.4 m), the equivalent of a six-story building.
Flight
· The 747 fleet has logged 20 billion statute miles (32 billion km) – enough to make 42,000 trips to the moon and back.
· The 747 fleet has flown 2.2 billion people – the equivalent of nearly 40 percent of the world's population.
· The 747-400 range is approximately 8,400 statute miles (13,515 km), an increase of nearly 2,300 statute miles (3,700 km) more than the first 747.
· A 747-400 typically takes off at 180 mph (290 km/h), cruises at 565 mph (910 km/h) and lands at 160 mph (260 km/h).
· For a typical international flight, one 747 operator uses no fewer than 5.5 tons of food supplies and more than 50,000 in-flight service items.
Engines
· Engine thrust has grown from 43,500 pounds (19,730 kg) per engine on the early 747s to 62,100 pounds (27,490 kg) on the current model.
· The diameter of the 747 engine cowling is 8 feet 6 inches (2.6 m).
· Engine noise from today's 747-400 is half of what it was on the original 747s delivered in 1970.
Engineering & Testing
· Seventy-five thousand engineering drawings were used to produce the first 747.
· The first 747 completed more than 15,000 hours of wind-tunnel testing.
· The original 747 flight test program, which led to the airplane's certification for commercial service in December 1969, used five airplanes, lasted 10 months and required more than 1,500 hours of flying.
Fuel
· The 747-400 can carry more than 57,000 gallons of fuel (215,745 L), making it possible to fly extremely long routes, such as San Francisco-Sydney, Australia.
· A 747-400 that flies 3,500 statute miles (5,630 km) and carries 126,000 pounds (56,700 kg) of fuel will consume an average of five gallons (19 L) per mile.
· The 747-400 carries 3,300 gallons (12,490 L) of fuel in the horizontal (tail) stabilizer, allowing it to fly an additional 400 miles.
· The 747-400 is up to 13 percent more fuel efficient than its predecessor, the 747-300, depending on the engine.

Wings
· One 747-400 wing weighs 28,000 pounds (12,700 kg), 10 times the weight of the first Boeing airplane, the 1916 B&W.
· One 747-400 wing measures 5,600 square feet (524.9 m2), an area large enough to hold 45 medium-sized automobiles.
· Four World War I vintage JN4-D “Jenny” airplanes could be lined up on each of the Boeing 747 wings.
· How much weight does an additional 6-foot (1.8 m) wingtip extension and winglet add to the 747-400 wing? None! A weight savings of approximately 5,000 pounds (2,270 kg) was achieved in the wing by using new aluminum alloys, which offset the weight increase of the wing tip extension and winglet.
Interior
· At 31,285 cubic feet (876 m3), the 747-400 has the largest passenger interior volume of any commercial airliner, which is equivalent to more than three houses each measuring 1,500 square feet (135 m2).
· The 747-400 has a redesigned “flexible” cabin interior that not only improves passenger conveniences and appeal, but allows airlines to rearrange seats and class configuration overnight (in eight hours). They also permit 48-hour conversion times for changes in galley and lavatory locations.
· Airline cargo handlers use the 747-400's lower-lobe cargo handling system to load or unload more than 65,000 pounds (30,000 kg) of cargo – the equivalent of 625 pieces of luggage combined with 20 tons of revenue freight – in less than 15 minutes.
· The Wright Brothers' first flight at Kitty Hawk, N.C., could have been performed within the 150-foot (45 m) economy section of a 747-400.
· There are 365 lights, gauges and switches in the 747-400 flight deck, reduced from 971 on earlier 747 models.