38:
330:. Boeing built a specially designed pylon for the testbed. Suspended on a 19 ft (580 cm) strut, the fourth engine of the program began flight testing at the end of 2017. The engine, with a fan diameter of 134 in (340 cm), is installed in a 174 in (440 cm) diameter nacelle, with 1.5 ft (0.46 m) of ground clearance. The engine and nacelle weighed 40,000 lb (18 t) with its new pylon and wing strengthening, compared to 17,000 lb (7.7 t) for the CF6-80C2s and its pylon.
308:
436:. Before certification, final tests included a full durability block test, replacing the usual "triple redline" test at maximum EGT and both rotor speeds, as modern high-bypass ratio engines cannot achieve all maximum conditions near sea level. The high-pressure compressor stator redesign delayed engine certification into autumn, which delayed the 777X first flight until January 2020.
462:(TSFC) than the XWB-97 with maintenance costs comparable to the GE90-115B. The initial thrust of 105,000 lbf (470 kN) will be followed by 102,000 and 93,000 lbf (450 and 410 kN) derated variants. GE invested more than $ 2 billion for its development. Its nacelle is 184 in (4,700 mm) wide.
489:
The high pressure (HP) compressor is up to 2% more efficient. As the 129.5 in (329 cm) GE90 fan left little room to improve the bypass ratio, GE looked for additional efficiency by upping the overall pressure ratio from 40 to 60, focusing on boosting the high-pressure core's ratio from 19:1
239:
Design changes between FETT and second engine to test (SETT) addressed improvements required to meet efficiency goals: the minimum area in the duct between the HP turbine outlet and the LP turbine inlet was altered to set the operating line of the compressor, turbine and fan. The tip clearance at the
341:
on the 747 testbed CF6 engines discovered fan-case corrosion and high pressure turbine airfoils on allowable limits. It first flew on March 13 with the previous design of the VSV lever arm. In early May, the first flight test phase of two was completed after 18 flights and 110 hours of run time; the
173:
In 2013, the fan diameter was increased by 3.5 in (9 cm) to 132 in (335 cm). In 2014, thrust was increased slightly from 102,000 to 105,000 lbf (450 to 470 kN) and the fan diameter was increased by 1.5 in (4 cm) to 133.5 in (339 cm). In 2016, its
244:, 13 months after FETT; it was the first engine built to the finalized production standard for certification. During the FAA 150 hr block test, the variable stator vane (VSV) lever arm failed and its redesign led to a 3–month delay. SETT was followed by four more test engines by May 2018.
473:, whereas the similarly sized GE90 has 22 and the smaller GEnx has 18. Having fewer fan blades reduces the engine weight, improves aerodynamic efficiency, and allows the low pressure (LP) fan and booster to spin faster to better match its speed with the LP turbine. The fan blades feature
170:. 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. The engine for the 777-8X was to be derated to 88,000 lbf (390 kN).
181:
The first engine was expected to be ground-tested in 2016, with flight testing to begin in 2017 and certification happening in 2018. Because of the delays, the first flight test occurred in March 2018, with certification expected in late 2019.
521:
alloys with some cooling. CMCs have twice the strength at one-third the weight of metal and require 59% less cooling. In total, the engine has 65 CMC components, the most of any commercial aircraft engine at the time of its introduction.
431:
was established. Engines were modified to a final certifiable configuration standard before the maiden flight of the 777X, delayed beyond the previously expected June 26 by a stator problem at the front of the 11-stage high-pressure
279:. Icing tests started in Winnipeg at the end of 2017. The initial 777X flight-test engines were shipped in 2018 for an initial 777-9 flight in early 2019. A quarter of the certification testing was done by May 2018: icing,
485:
materials, comprising the bulk of the fan blades, make them lighter, thinner, stronger, and more efficient. The GE9X also uses a carbon fiber composite fan case, first developed for the GEnx, to further reduce weight.
236:. A design change required for the GEnx was the addition of bypass doors between the booster and high-pressure compressor which open into the airflow path to reduce the chance of ice crystals entering the core.
157:
by 10% compared to the GE90. It is rated at 110,000 lbf (490 kN) of thrust, which is 5,000 lbf (20 kN) less than the GE90 highest thrust variant, the GE90-115, rated at 115,000 lbf (510 kN).
274:
breaking the GE90-115B 127,900 lbf (569 kN) record set in 2002. The block test engine ran at its operational limits, at triple red-line conditions: maximum fan speed, maximum core speed, and maximum
490:
to 27:1 by using 11 compressor stages instead of 9 or 10, and a third-generation, twin-annular pre-swirl (TAPS) combustor instead of the previous dual annular combustor. Able to endure hotter temperatures,
369:
such as low altitudes; #5 ran an endurance test with rotors deliberately unbalanced to make the engine shake at the vibration limits allowed in service, a requirement for ETOPS certification; #6 did
443:
type certificate, as eight test engines completed 8,000 cycles and 5,000 hours of running. ETOPS approval needed 3,000 ground-test cycles to be completed as a requirement for entry into service.
502:. CMCs are not used for the first-stage turbine blades, which have to endure extreme heat and centrifugal forces. These are improvements planned for the next iteration of engine technology.
873:
255:, altitude test cell to check blade vibrations and engines 003, 004, and 007 were assembled in 2017, and the fourth engine was used for flight testing later in the year from
190:
The first engine to test (FETT) completed its first run in April 2016. This engine completed 375 cycles in 335 hours run-time, which validated the engine design in terms of
909:
419:
By
January 4, 2019, eight test flights and 55 hours of run time had been completed. At the end of January, the turbine case and rear frame strut were damaged during the
439:
On
January 25, 2020, the GE9X had its first flight on the 777X, flying for 3 hours and 52 minutes, before landing at Boeing Field. On September 28, GE announced its
1580:
1433:
1339:
1541:
1310:
926:
166:
In
February 2012, GE announced studies on a more efficient derivative of the GE90, calling it the GE9X, to power both the -8/9 variants of the new
1458:
1139:
342:
GE9X high-altitude envelope was explored and its cruise performance evaluated. The second phase was scheduled to begin in the third quarter.
881:
830:
1272:
1099:
377:; #8 did the triple redline FAA 150 h endurance test. Eight compliance engines, plus two spares, were required for 777-9 flight testing.
1253:
2010:
1415:
1154:
966:
811:
1400:
984:
1234:
1073:
1986:
1534:
1291:
2005:
1022:
333:
In
February 2018, the GE9X's first flight was delayed by problems discovered in the high-pressure compressor (HPC) variable
1215:
247:
The certification program began in May 2017. Eight additional engines were involved for certification, as well as one for
240:
front of the HP compressor was modified as a result of early running experience. SETT testing started on May 16, 2017, at
790:
1483:
1910:
1768:
1527:
1177:
944:
557:
is used to manufacture parts that would otherwise be impossible to make using traditional manufacturing processes.
459:
428:
852:
2015:
440:
385:
142:
1519:
1507:
1362:
465:
Most of the efficiency increase comes from the better propulsion efficiency of the higher-bypass-ratio fan. The
393:
270:
On
November 10, 2017, a GE9X engine reached a record thrust of 134,300 lbf (597 kN) in Peebles, a new
1196:
345:
By
October 2018, half of the certification was completed, and eight development engines were used, mostly in
1121:
349:: #1 was stored; a fan blade was deliberately separated from the fan hub of #2 at takeoff thrust for the
481:
trailing edges to better absorb bird strikes with more flexibility than carbon fiber. Fourth generation
217:
were made within one month. Icing certification and evaluation finished during the 2017–2018 winter at
1514:
405:
1863:
1833:
1735:
1665:
560:
In August 2024 a first production bound engine will be delivered, with a new combustor liner design.
1434:"Daily Memo: GE Aerospace Targets GE9X Production Ramp Ahead Of Boeing 777X | Aviation Week Network"
137:. It first ran on the ground in April 2016 and first flew on March 13, 2018; it powered the 777-9's
766:
517:
linings are made from CMC, only static components, operating 500 °F (260 °C) hotter than
491:
469:
is planned for 10:1. The fan is housed in 134 in (340 cm) diameter case. The GE9X has 16
150:
1950:
1945:
1940:
1935:
1930:
1925:
1747:
1691:
397:
276:
256:
380:
A second phase, of 18 flights, began on
December 10 to evaluate the engine control software and
1973:
1920:
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20:
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later in 2018; after LP turbine over-temperature tests, #7 did a second icing test phase in
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1617:
1612:
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327:
175:
126:
988:
8:
259:. In 2018 ten compliance engines (including two spare engines) were needed for the four
37:
546:
374:
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As it was larger than the GE90, the GE9X could only be installed under the wing on the
264:
218:
920:
420:
409:
350:
232:. This testing improved the understanding of core icing as well as the more familiar
195:
874:"The Art Of Engineering: The World's Largest Jet Engine Shows Off Composite Curves"
433:
206:
427:
program was completed after 320 hours run time, during which high-altitude cruise
1554:
1549:
366:
362:
251:
certification installed in the aircraft nacelle. A core engine was tested in the
201:
The GE9X conducted icing tests in Winter 2017. The FETT was used for ground cold
154:
494:(CMC) are used in two combustor liners, two nozzles, and the shroud up from the
1723:
1459:"GE Set To Deliver First Boeing 777X Production Engine | Aviation Week Network"
542:
319:
312:
252:
1380:
1043:
396:
and block or endurance testing had been completed. Flight tests were based in
1999:
1335:
907:
413:
346:
241:
153:(CMCs), and higher bypass and compression ratios, it was designed to improve
138:
388:
certification the same year. By then water ingestion, crosswind, blade-out,
1551:
656:
526:
466:
381:
358:
296:
284:
130:
77:
19:
For the similarly-named engine which powers the Boeing 787 and 747-8, see
1607:
1602:
554:
541:
margin to CAEP/8. The compressor and high pressure turbine are made from
424:
225:
191:
167:
134:
97:
46:
1825:
1784:
1685:
1074:"GE9X For Boeing 777X Delivered For Final Flying Testbed Certification"
612:
506:
499:
478:
323:
322:
with its larger main gear struts and bigger tires and not the previous
288:
210:
1820:
635:
134 in (3,404 mm) diameter, 16 wide chord composite blades
534:
514:
470:
389:
354:
280:
1340:"The biggest jet engines ever seen are set to roar on Boeing's 777X"
446:
In 2022 a different issue with the GE9X paused testing of the 777X.
307:
1657:
1562:
908:
Scott
Fancher, Randy Tinseth, Bill Fitzgerald (November 18, 2013).
454:
The GE9X increases fuel efficiency by 10% over the GE90. Its 61:1
233:
57:
224:
Simulated high-altitude conditions were used to test the GE9X for
1960:
622:
401:
338:
202:
1311:"Boeing halts 777-9 flight testing following GE9X engine issue"
685:
550:
518:
510:
334:
145:(FAA) type certificate on September 25, 2020. Derived from the
1273:"GE9X Engine Anomaly Likely To Delay Boeing 777X First Flight"
384:
performance and lasted until the first quarter of 2019 before
605:
530:
474:
260:
248:
987:(Press release). GE Aviation. April 11, 2016. Archived from
423:
and relevant components were redesigned. In early May, the
229:
985:"Start your engines…First full GE9X engine begins testing"
880:. General Electric Company. April 28, 2016. Archived from
1416:"After six years, 777X engine starts certification tests"
538:
1023:"GE Testing For Boeing 777X Engine Moves Into High Gear"
1140:"GE9X Breaks GUINNESS WORLD RECORDS™ Title for Thrust"
1328:
1254:"Boeing installs GE9X engines on 777X test aircraft"
967:"GE9X engine issue pushes 777X first flight to 2020"
812:"GE plans 10% fuel burn improvement for GE9X engine"
549:(TiAl) are stronger, lighter, and more durable than
198:
behaviour and secondary air system heat management.
1374:
1372:
1038:
1036:
326:GE testbed. The engine was tilted 5° more than the
1176:
1170:
1168:
1115:
1113:
1093:
1091:
1089:
1087:
960:
958:
868:
866:
806:
804:
1197:"GE Ramps Up For GE9X Flight Certification Tests"
1067:
1065:
1063:
1061:
1059:
831:"GE Pushes Envelope With GE9X for new Boeing 777"
784:
782:
1997:
1369:
1308:
1289:
1251:
1232:
1155:"Boeing achieves 90% drawing milestone on 777-9"
1033:
365:cascade assembly; #4 explored boundaries of the
1413:
1407:
1401:"GE Fans Out on Testing of New GE9X Fan Blades"
1283:
1235:"GE begins second round of GE9X flight testing"
1226:
1165:
1152:
1110:
1097:
1084:
955:
942:
903:
901:
899:
863:
801:
1403:(Press release). GE Aviation. August 21, 2013.
1264:
1207:
1122:"Preparing To Test The World's Largest Engine"
1100:"GE9X completes first phase of flight testing"
1056:
1016:
1014:
1012:
1010:
1008:
1006:
938:
936:
779:
596:Single annular Twin Annulus Premixing Swirler
228:icing (core icing) which was an issue for the
1535:
1382:See inside the GE9X, GE's newest game-changer
1334:
1216:"Boeing 777X Engine Flight Test Facing Delay"
977:
1189:
1142:(Press release). GE Aviation. July 12, 2019.
964:
925:: CS1 maint: multiple names: authors list (
896:
788:
545:. The low-pressure turbine airfoils made of
267:was planned for the fourth quarter of 2018.
1378:
1178:"World's Largest Engine Readied For Flight"
1003:
933:
915:. Boeing Commercial Airplanes, GE Aviation.
149:with a larger fan, advanced materials like
1542:
1528:
1357:
1355:
1353:
1292:"FAA certificates 777X's GE9X powerplants"
1270:
533:, combined bladed-disk. The combustor is
509:, the first- and second-stage HP turbine
306:
1350:
1290:Jon Hemmerdinger (September 28, 2020).
651:161.3 × 163.7 in (4097 × 4158 mm)
337:vanes (VSV) lever arms. Also a routine
1998:
1484:"Type Certificate data sheet E00095EN"
1233:Jon Hemmerdinger (December 11, 2018).
1213:
1174:
1119:
1071:
1020:
828:
791:"Next generation 777 comes into focus"
1523:
1309:Jon Hemmerdinger (December 1, 2022).
1153:Stephen Trimble (November 12, 2017).
853:"777X Configuration Changes Revealed"
292:
1476:
1252:Jon Hemmerdinger (January 7, 2019).
1220:Aviation Week & Space Technology
1201:Aviation Week & Space Technology
1126:Aviation Week & Space Technology
1078:Aviation Week & Space Technology
1045:GE9X: The world's biggest fan of ice
1027:Aviation Week & Space Technology
965:Hemmerdinger, Jon (July 24, 2019).
789:Jon Ostrower (September 14, 2011).
525:The compressor is designed with 3D
13:
943:Stephen Trimble (March 15, 2018).
14:
2027:
2011:General Electric aircraft engines
1499:
1363:"GE9X Commercial Aircraft Engine"
1175:Norris, Guy (November 27, 2017).
829:Alcock, Charles (June 16, 2013).
698:103,500 lbf (460.4 kN)
690:110,000 lbf (489.3 kN)
563:
302:
185:
1550:GE Aircraft Engines/GE Aviation/
1414:Stephen Trimble (May 30, 2017).
1214:Norris, Guy (February 2, 2018).
1098:Stephen Trimble (May 29, 2018).
460:thrust specific fuel consumption
36:
1451:
1426:
1393:
1302:
1245:
1146:
1132:
1072:Norris, Guy (October 9, 2018).
945:"GE9X enters flight test phase"
679:21,230 lb (9,630 kg)
671:60:1, HPC pressure ratio: 27:1
643:224.0 in (5,690 mm)
617:1 fan, 3-stage LP, 11-stage HP
537:for greater efficiency and 30%
458:should help provide a 5% lower
143:Federal Aviation Administration
141:in early 2020. It received its
16:High-thrust turbofan jet engine
845:
822:
529:and its first five stages are
357:ground testing and cyclic and
161:
49:during roll-out in March 2019
1:
1987:Joint development aeroengines
1379:GE Aviation (July 13, 2014).
833:. Aviation International News
772:
295:turbine blade vibrations and
213:; minor design changes using
2006:High-bypass turbofan engines
1120:Norris, Guy (May 20, 2016).
1052:. GE Aviation. May 15, 2017.
1021:Norris, Guy (May 18, 2017).
797:. Reed Business Information.
311:GE Propulsion Test Platform
7:
1271:Guy Norris (June 6, 2019).
720:
505:The first-stage HP turbine
10:
2032:
1486:. FAA. September 25, 2020.
406:Colorado Springs, Colorado
18:
1983:
1959:
1909:
1819:
1656:
1561:
492:ceramic matrix composites
449:
151:ceramic matrix composites
44:
35:
30:
1494:
767:List of aircraft engines
585:Dual rotor, axial flow,
513:and the inner and outer
627:2-stage HP, 6-stage LP
400:, and ranged as far as
398:Victorville, California
277:exhaust gas temperature
257:Victorville, California
2016:2010s turbofan engines
695:Max continuous thrust
667:Overall pressure ratio
496:CFM International LEAP
483:carbon fiber composite
456:overall pressure ratio
353:test; #3 was used for
315:
263:flight-test aircraft.
215:additive manufacturing
45:GE9X installed on the
1277:Aviation Week Network
1183:Aviation Week Network
749:Rolls-Royce Trent XWB
737:General Electric GEnx
732:General Electric GE90
310:
287:distortion , fan and
272:Guinness World Record
147:General Electric GE90
123:General Electric GE9X
114:General Electric GEnx
110:General Electric GE90
21:General Electric GEnx
587:high bypass turbofan
133:exclusively for the
127:high-bypass turbofan
1338:(January 4, 2019).
991:on October 20, 2016
754:Rolls-Royce Advance
726:Related development
570:
283:/inlet distortion,
205:testing in natural
1911:Aeroderivative gas
1203:. October 9, 2018.
743:Comparable engines
568:
547:titanium aluminide
477:leading edges and
375:Winnipeg, Manitoba
316:
291:blade vibrations,
265:Type certification
219:Winnipeg, Manitoba
93:Major applications
1993:
1992:
1344:The Seattle Times
718:
717:
714:LP 2355, HP 9561
569:GE Aviation GE9X
410:Fairbanks, Alaska
196:mechanical system
119:
118:
2023:
1555:aircraft engines
1544:
1537:
1530:
1521:
1520:
1511:
1510:
1508:Official website
1488:
1487:
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1474:
1473:
1471:
1469:
1463:aviationweek.com
1455:
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1438:aviationweek.com
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916:
914:
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894:
893:
891:
889:
884:on June 25, 2017
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861:
860:
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843:
842:
840:
838:
826:
820:
819:
818:. March 7, 2012.
808:
799:
798:
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571:
567:
498:stage 2 turbine
294:
207:icing conditions
106:
94:
66:
40:
28:
27:
2031:
2030:
2026:
2025:
2024:
2022:
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2020:
1996:
1995:
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1989:
1979:
1955:
1913:turbine engines
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1905:
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1004:
994:
992:
983:
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978:
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956:
941:
934:
918:
917:
912:
910:"777X Overview"
906:
897:
887:
885:
872:
871:
864:
859:. June 9, 2014.
851:
850:
846:
836:
834:
827:
823:
810:
809:
802:
787:
780:
775:
723:
648:Width × Height
566:
452:
371:ingestion tests
367:flight envelope
363:thrust reverser
305:
188:
174:list price was
164:
155:fuel efficiency
104:
92:
65:National origin
64:
24:
17:
12:
11:
5:
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2019:
2018:
2013:
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320:Boeing 747-400
313:Boeing 747-400
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253:Evendale, Ohio
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1552:GE Aerospace
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1466:. Retrieved
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1441:. Retrieved
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1420:Flightglobal
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1320:February 28,
1318:. Retrieved
1315:Flightglobal
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993:. Retrieved
989:the original
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971:Flightglobal
970:
949:Flightglobal
948:
886:. Retrieved
882:the original
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837:November 24,
835:. Retrieved
824:
816:Flightglobal
815:
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657:Bypass ratio
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535:lean burning
527:aerodynamics
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382:hot-and-high
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131:GE Aerospace
122:
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78:GE Aerospace
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1826:turboshafts
555:3D printing
425:flight test
226:ice crystal
192:aerodynamic
168:Boeing 777X
162:Development
135:Boeing 777X
98:Boeing 777X
87:April 2016
2000:Categories
1821:Turboprops
1515:GE9X press
878:GE reports
773:References
711:RPM, 100%
613:Compressor
593:Combustor
479:fiberglass
434:compressor
211:ground fog
84:First run
1775:F404/F412
1658:Turbofans
1563:Turbojets
515:combustor
429:fuel burn
390:hailstone
355:crosswind
351:blade-out
281:crosswind
1961:Propfans
1864:H-Series
1834:Catalyst
1736:Passport
1698:CJ805-23
1666:Affinity
1468:July 13,
1443:July 13,
921:cite web
756:(future)
721:See also
684:Takeoff
601:Control
574:Variant
234:rime ice
209:such as
58:Turbofan
1387:YouTube
1050:YouTube
995:June 2,
888:June 2,
676:Weight
640:Length
623:Turbine
577:105B1A
511:nozzles
402:Seattle
361:of the
339:A Check
324:747-100
289:booster
203:weather
178:41.4M.
1951:LMS100
1946:LM9000
1941:LM6000
1936:LM2500
1931:LM1600
1926:LM1500
1718:GP7000
1686:CFE738
1586:GE4/J5
686:thrust
551:nickel
531:blisks
519:nickel
507:shroud
500:shroud
471:blades
450:Design
412:, and
335:stator
328:GE CF6
1921:LM500
1811:XA102
1806:XA100
1764:YF120
1724:HF120
1692:CFM56
1681:CF700
1648:YJ101
1576:CJ805
1571:CJ610
1495:Notes
913:(PDF)
661:10:1
606:FADEC
582:Type
475:steel
285:inlet
261:777-9
249:ETOPS
125:is a
54:Type
31:GE9X
1974:RISE
1969:GE36
1901:T901
1896:T700
1891:T408
1886:T407
1859:GE38
1854:GE27
1849:CT64
1844:CT58
1824:and
1801:TF39
1796:TF34
1791:RM16
1785:RM12
1780:F414
1769:F136
1759:F118
1754:F110
1748:F108
1743:F101
1730:LEAP
1713:GEnx
1708:GE9X
1703:GE90
1676:CF34
1638:YJ93
1470:2024
1445:2024
1322:2024
997:2017
927:link
890:2017
839:2018
706:5.2
632:Fan
230:GEnx
176:US$
121:The
47:777X
1881:T64
1876:T58
1871:T31
1839:CT7
1671:CF6
1643:J97
1633:J87
1628:J85
1623:J79
1618:J73
1613:J47
1608:J35
1603:J33
1598:J31
1591:I-A
1581:GE1
539:NOx
441:FAA
386:FAA
2002::
1985:†
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1976:†
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23:.
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