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In February 2012, GE announced studies on a more efficient derivative of the GE90, calling it the GE9X, to power both the -8 and -9 variants of the new Boeing 777X.It was to feature the same 128 in (325 cm) fan diameter as the GE90-115B with thrust decreased by 15,800 lbf (70 kN) to a new rating of 99,500 lbf (443 kN) per engine. [1]
The 777-8 should feature a 13,000 lb (5.9 t) higher MTOW over the 775,000 lb (352 t) of the 777-9, for an improved range from 8,690 to 9,460 nmi (16,090 to 17,520 km). [ 96 ] Due to the Boeing 737 MAX groundings and the delayed first flight of the 777-9, in 2019 Boeing pushed back design and development of the 777-8 until at least 2021, for ...
In November 2013, Boeing announced the development of the third generation 777X (variants include the 777-8, 777-9, and 777-8F), featuring composite wings with folding wingtips and General Electric GE9X engines, and slated for first deliveries in 2026. As of 2018, Emirates was the largest operator with a fleet of 163 aircraft.
The higher thrust GE90-110B1 and -115B engines, in combination with the second-generation 777 variants -200LR and -300ER, were primary reasons for 777 sales being greater than those of the rival A330/340 series. [19] Using two engines produces a typical operating cost advantage of around 8–9% for the -300ER over the A340-600. [20]
Pages for logged out editors learn more. Contributions; Talk; 777-9
The 280 cm (110 in) fan has 26 wide chord titanium fan blades. [10]The Trent 800 is an axial flow, high bypass turbofan with three coaxial shafts. The fan is driven by a 5-stage axial LP turbine (3300 rpm), the 8-stage IP compressor (7000 rpm) and the 6-stage HP compressor (10611 rpm) are each powered by a single stage turbine.
The thrust-to-weight ratio varies continually during a flight. Thrust varies with throttle setting, airspeed, altitude, air temperature, etc. Weight varies with fuel burn and payload changes. For aircraft, the quoted thrust-to-weight ratio is often the maximum static thrust at sea level divided by the maximum takeoff weight. [2]
The XWB-84 generates up to 84,200 lbf (375 kN) of thrust and the XWB-97 up to 97,000 lbf (431 kN). The engine has a 9.6:1 bypass ratio and a 50:1 pressure ratio. [58] It had its first in-flight shutdown on 11 September 2018, as the fleet accumulated 2.2 million flight hours. [59] It is the most powerful among all Trent engines.