By Bruce Campion-Smith
Smith examines the improvement of the Boeing 777 airplane and appears at its fly-by-wire know-how. The 777 is the newest within the Boeing kin of jetliners and has revolutionized civil aviation. it is a energetic, pocket-sized advisor to an airline know-how that would carry us into the twenty first century.
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Additional resources for Boeing 777
Upgrade of the system installed in AIMS and the fly-by-wire one another through a new The computers system on the 747- 'talk' to two-way databus called ARINC 629. It 400, the maintenance computer collects permits aircraft systems and their computers detailed data on about 87 aircraft systems to and components such as air path instead of through separate one-way electrical, fire protection, brakes and hydraulics. At the end of a conditioning, flight, mechanic uses the computer to that may have connections.
Also a back-up generator on each new extra redundancy for feature of the 777 for ETOPS flights. These variable-speed, variable-frequency generators can each supply up to 20kVA of ac power. of RAT on A convertor changes the variable frequency the configuration found on the smaller twins, power to constant frequency power. On the same shaft as the back-up generator are two permanent magnet generators on each engine which power the fly-by-wire system. In case of a failure, the FBW system can draw from other sources including the 28V dc the 757 and 767, but has additional buses.
In this test, there must be no uncontained damage and no fire and the than engine must operate for be safely shut down. In the case of the GE90, standards, the bolt 1 05,0001b of thrust. The force of the blade's impact on the engine casing 1 5sec to permit a controlled shutdown. was equal to a full-size car hitting a brick wall at In 80mph. addition to these were run 53 for trials, the engines thousands of hours on ground Above: PW4000 & Whitney employees got a look 777 when WA003 paid a visit to East Hartford, Ct November 1994.