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The aircraft involved was the prototype Boeing 747-400 (Boeing 747-451, c/n 23719, reg N661US) and was built by Boeing, and started the flight testing program for the new model, registered as N401PW, in April 1988. It was subsequently reregistered as N661US and delivered to Northwest Airlines (the launch customer for the 747-400) on December 8 ...
The Boeing 747-121 [Note 1] rolled off of Boeing's assembly line in 1969 as the 25th Boeing 747 constructed. [citation needed] Originally registered as N744PA, the aircraft was delivered to Pan American World Airways . N744PA remained under the ownership of Pan Am until 1991, when the airline declared bankruptcy on January 8, 1991. [1] [2]
Boeing conducted a series of test flights in 2015 with a modified Boeing 757, incorporating new wing-leading-edge sections and an actively blown vertical tail. [10] The left wing was modified to include a 6.7 m-span glove section supporting a variable-camber Krueger flap to be deployed during landing, protruding just ahead of the leading edge.
The Boeing 747 is a long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023. After the introduction of the 707 in October 1958, Pan Am wanted a jet 2 + 1 ⁄ 2 times its size, to reduce its seat cost by 30%.
Boeing 747: Corrosion in pylon fuse pin leading to metal fatigue 4 on board, 39 on ground Engine No.3 separated from its pylon which caused the adjacent engine No.4 to also fall off, taking the slats with them; stall and crash on attempted landing 1996-07-17 TWA Flight 800: Moriches Inlet, near East Moriches, New York, United States Boeing 747
This Boeing 747-451 [Note 1] was the first 747-400, an improved version of Boeing's successful jumbo jet. The aircraft was the 696th Boeing 747 built and carried manufacturer's serial number 23719. [2] Final assembly began at the Boeing Everett Factory, the longtime site of 747 production, in September 1987. Assembly was completed over the ...
High-lift devices compensate for this design trade-off by adding lift at takeoff and landing, reducing the speed and distance required to safely land the aircraft, and allowing the use of a more efficient wing in flight. The high-lift devices on the Boeing 747-400, for example, increase the wing area by 21% and increase the lift generated by 90 ...
Pratt & Whitney faced difficulties with the JT9D design during the Boeing 747 test program. Engine failures during the flight test program resulted in thirty aircraft being parked outside the factory with concrete blocks hanging from the pylons, awaiting redesigned engines. Boeing and Pratt & Whitney worked together in 1969 to solve the problem.