Boeing 747-200B
From MetroAirWiki
| Boeing 747-200B | |
|---|---|
 · 737-200 · 737-700· 747-200B · 757-200 · 767-200 · 767-200ER · | |
| Manufacturer | Boeing |
| Designed by | Tom Collins |
| EIS | July, 2007 |
| Status | Retired from Active Service April, 2008 |
| Registrations | 790MM · 791MM |
| Available Models | Project OpenSky |
Contents |
Visuals
Specifications
General
Crew: 2+6
Passengers: 436
Dimensions
Wingspan: 195ft 8in
Height: 63ft 5in
Length: 231ft 10in
Empty Weight: 380,0510lbs
Engines
Number: 4x Pratt & Whitney JT9D-TJ's
Power: 50,0000lbs
Operations
Max Cruise Altitude: 41,000ft
Max Cruise Speed : 510kts
Max Takeoff Weight: 785,000lbs
Max Range: 6,600nm
Overview
The 747 was born from the massive increase in air travel in the 1960s. The era of commercial jet transportation, led by the enormous popularity of the Boeing 707 and Douglas DC-8, had revolutionized long distance travel. Boeing had already developed a study for a very large fixed-wing aircraft while bidding on a US military contract for a huge cargo plane. Even before it lost the contract to Lockheed's C-5 Galaxy in September 1965 Boeing came under pressure from Juan Trippe, president of its most loyal airline customer Pan Am, to build a giant passenger plane that would be over twice the size of the 707.
In 1965 Joe Sutter was transferred from Boeing's 737 development team to manage the studies for new airliner, already assigned its model number 747. The original design was a full-length double-decker fuselage seating eight across (3–2–3) on the lower deck and seven across (2–3–2) on the upper deck. However, concern over evacuation routes and limited cargo carrying capability caused this idea to be scrapped in early 1966 favor of wider single deck, becoming the first wide-body airliner.
One of the principal technologies which enabled an airplane as large as the 747 to be conceived was the high-bypass turbofan engine. This promised to deliver double the power of the earlier turbojets, while consuming one third less fuel. General Electric had pioneered the concept but were fully committed to developing the engine for the C-5 Galaxy. Pratt & Whitney were also working on the same principle, and by late 1966 Boeing, Pan-Am and Pratt & Whitney agreed that Pratt would develop a new engine, designated JT9D to power the 747. Four of these engines were mounted in pods below the 747's wings.
To appease concerns about the safety and flyability of such a large passenger aircraft, the 747 was designed with multiple structural redundancy, four redundant hydraulic systems, and quadruple main landing gear with 16 wheels which provided a good spread of support on the ground and safety in the event of tire blow-outs. In addition, the 747 had split control surfaces, and sophisticated triple-slotted flaps that minimised landing speeds allowing it to use standard-length runways. The wing was swept back at an unusually high angle of 37.5 degrees which was chosen in order to minimize the wing span, thus allowing the 747 to use existing hangars.
The 747-200B is an improved version of the 747-200, with increased fuel capacity and more powerful engines. Qantas took delivery of these from 1971. It comes in a combi version as well. The -200B aircraft have a full load range of about 6,700 miles (10,700 km).
The Boeing 747-200B has been replaced by the Airbus A330 for Long Haul Flights.
