GE90

概要

The GE90 is the world's most powerful jet engine, holding the official thrust record with the GE90-115B variant at 127,900 lbf (569 kN) — a Guinness World Record set during a 2002 test run at GE's Peebles facility. Developed exclusively for the Boeing 777, the GE90 was a clean-sheet design that pioneered large composite fan blades in commercial aviation, with its 128-inch (3.25 m) composite fan on the GE90-115B being larger in diameter than the fuselage of many narrowbody aircraft. It represents GE Aerospace's dominant position in the widebody market and the technology foundation for subsequent GE large engines.

The GE90 was selected by British Airways and other launch customers for the original 777-200 in 1995. However, it was the GE90-115B's exclusive selection for the 777-200LR and 777-300ER — Boeing's highest-value variants — that secured the program's dominance. Pratt & Whitney (PW4090) and Rolls-Royce (Trent 890) also offered engines for early 777 variants, but GE90 achieved near-exclusivity on the 777ER variants, and the GE90-115B became the sole engine for the 777-200LR, 777-300ER, and 777F. This locked in billions in aftermarket revenue for GE Aerospace over the aircraft's multi-decade service life.

技術仕様

派生型

The GE90 family encompasses distinct thrust tiers. The GE90-76B/77B (76,000–77,000 lbf) powered early 777-200 variants for some operators. The GE90-85B/90B (85,000–90,000 lbf) served the 777-200 and some 777-200ER applications. The GE90-94B (94,000 lbf) is used by the 777-200ER. The landmark GE90-115B (115,300 lbf nominal, 127,900 lbf test record) is the exclusive engine for the 777-200LR, 777-300ER, and 777F — GE's most commercially successful large engine variant. The 115B features a 128-inch composite fan with 22 blades (versus 92 blades on early metal-fan variants), a 10-stage HPC, and a 2-stage HPT with single-crystal superalloy blades.

搭載機

• Boeing 777-200: GE90-76B/77B/85B (76,000–85,000 lbf) — original twin-engine widebody, also offered with PW4090 and Trent 877
• Boeing 777-200ER: GE90-90B/94B (90,000–94,000 lbf) — extended range variant, also offered with PW4090 and Trent 895
• Boeing 777-200LR: GE90-115B (115,300 lbf) — ultra long range, exclusive engine, world range record holder
• Boeing 777-300: GE90-115B (115,300 lbf) — stretched variant, also offered with PW4098 and Trent 892
• Boeing 777-300ER: GE90-115B (115,300 lbf) — best-selling 777 variant, exclusive engine, over 800 delivered

開発の歴史

GE launched the GE90 development in 1990 as a clean-sheet design for the new 777 program. The first engine test run occurred in April 1993 at Peebles, Ohio. FAA certification was awarded in October 1995, and British Airways launched revenue service with GE90-powered 777-200s in November 1995. The GE90-115B variant — a substantial growth step enabled by a new composite fan and upgraded core — was certified in 2003, entering service on the 777-300ER with Air France. The record thrust test of 127,900 lbf in 2002 was conducted with a specially instrumented test engine to validate the 115B's structural margins. The GE90-115B production run will ultimately transition to support as the 777X enters service with the GE9X engine; however, the massive existing fleet of 777-300ER and 777F aircraft ensures GE90 maintenance, repair, and overhaul demand through the 2040s.