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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.
The organization won its request, and the Air Force Headquarters Air Mobility Command responded that the cost per flying hour (CPFH) was $206,337 — 10 times the CPFH of a regular Boeing 747.
For example, Concorde cruised at 1354 mph, or 7.15 million feet per hour, with its engines giving an SFC of 1.195 lb/(lbf·h) (see below); this means the engines transferred 5.98 million foot pounds per pound of fuel (17.9 MJ/kg), equivalent to an SFC of 0.50 lb/(lbf·h) for a subsonic aircraft flying at 570 mph, which would be better than even ...
On the other side, the least efficient was British Airways at 27 pax-km/L (3.7 L/100 km [64 mpg ‑US] per passenger), using fuel-inefficient Boeing 747-400s with a low density of 0.75 seat/m 2 due to a high 25% premium seating, in spite of a high 82% load factor.
The E-4B "Nightwatch" is a militarized version of a Boeing 747-200. ... It costs $159,529 per hour to operate, making it the Air Force's most expensive plane.
The Boeing 747 is a long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023. After the introduction of the 707 in October 1958, Pan Am wanted a jet 2 + 1 ⁄ 2 times its size, to reduce its seat cost by 30%.
The A check is performed approximately every 400 to 600 flight hours, or every 200 to 300 flights, depending on aircraft type. [6] It needs about 50 to 70 man-hours, and is usually performed in an airport hangar. The A check takes a minimum of 10 hours. Often airlines schedule these checks to occur overnight to minimize the impact of the plane ...
A higher cost index results in a higher ECON speed. Cost index can be given in "Boeing" or "English" units as ($/hr)/(cents/lb), equivalent to 100 lb/hr. [10] [11] A typical cost index in these units might be anywhere from 5 to 150. [12] Alternatively cost index can be given in metric or "Airbus" units of kg/min. [10] [11]