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How is a jet engine installed? The first A350 destined for flight testing has just been fitted with its two Rolls-Royce Trent XWB engines. But how are they attached to the wing? We took a closer look at this complex but delicate operation… Just three months away from its first flight, and the test A350 is being delicately taken care of. A first Rolls-Royce Trent XWB engine has just been installed on the left wing, and the second won’t take much longer. All mounting hardware supplied by the engine manufacturer is here, together with the ten technicians necessary to carry out this complex operation. Firstly, the engine, weighing in excess of 8 tonnes ( 17,500lbs. ), is positioned to the nearest millimetre below the engine pylon by means of lasers. "It’s important that we mount the engine in one operation without having to reposition it once it’s up in the air. We have different ways of lifting an engine, either with systems that are attached to the pylons, or we lift it with a machine that allows us to raise the whole apparatus which carries it." Once lifted, the engine can finally be fixed, bolted tight to the engine pylon. This is called "Torquing" ( not “talking” ); you don’t have to believe me, but they haven’t found anything more effective than the use of 'big bolts'! "Effectively, they are quite simply large bolts. There’re aft ( rear ) and forward ( front ) attachments. Then there is the connection of all the systems that are necessary to the aircraft: hydraulic power, electrical, and everything communicating with the cockpit, such as the throttles, etc." In the end, fixing the engine has taken more than six hours. In a few weeks, the Trent XWB will officially enter service on the A350 for testing the connections first, then for its first flight. This engine will carry out more 2,000 hours in-flight testing before its first commercial use by an airline.
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How is a jet engine installed ?

28/03/2013

DESCRIPTION : The first A350 destined for flight testing has just been fitted with its two Rolls-Royce Trent XWB engines. But how are they attached to the wing ? We took a closer look at this complex but delicate operation…

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