Rolls-Royce Trent 900

The Rolls-Royce Trent 900 is a high-bypass turbofan produced by Rolls-Royce plc to power the Airbus A380, competing with the Engine Alliance GP7000. Initially proposed for the Boeing 747-500 in July 1996, this first application was later abandoned but it was offered for the A3XX, launched as the A380 in December 2000. It first ran on 18 March 2003, made its maiden flight on 17 May 2004 on an A340 testbed, and was certified by the EASA on 29 October 2004. Producing up to 374 kN (84,000 lbf), the Trent 900 has the three shaft architecture of the Rolls-Royce Trent family with a 2.95 m (116 in) fan. It has a 8.5–8.7:1 bypass ratio and a 37–39:1 overall pressure ratio.

The Trent 900 family of engines had their first set of upgrades marketed as the Trent 900EP; these were available for delivery from 2012. This package delivered a 1% saving on fuel burn compared to non EP engines. Rolls-Royce told Aviation Week and Space Technology that the upgrades were intended in most cases for both new engines and as retrofits. This upgrade is based on advancements made during the development of the Trent XWB for the Airbus A350 XWB and matches improvements made for the Trent 700 called the Trent 700EP. Block 1 includes elliptical leading edges in the compressor, smaller low-pressure turbine tip clearances, and new coating for the high-pressure compressor drum, as well as an upgrade to the engine control (FADEC) software.

The EP2 package entered testing in May 2013 and was scheduled to be available for delivery in mid 2014. This package aims to provide a further 0.8% reduction in fuel burn on top of the improvements offered by the EP package. Changes include better sealing of the low-pressure turbine, improvements to fan blade tip clearances, and other changes derived from the engines developed for the Boeing 787 and Airbus A350. EP2 passed a type certificate test by European Aviation Safety Agency on 27 November 2013 and an update type certificate was issued on 11 December 2013.

In 2000 Qantas were quoted a price of US$12.85 million per Trent 900. In 2015 Emirates Airlines signed a contract for 200 Trent 900s including long-term service support at a cost of US$9.2 billion or US$46 million per engine. In 2016 ANA bought engines for three new Airbus A380 aircraft for $300m: $25m per Trent 900. A new set of LLPs is worth $7 million and an overhaul costs slightly more.

Country: United Kingdom

First run: 18 March 2003

Type: Three-shaft high bypass turbofan engine

Length: 5,478 mm (215.7 in)

Diameter: 2,950 mm (116 in)

Compressor: 8-stage IP axial compressor (IPC), 6-stage HP axial compressor (HPC)

Combustors: Single annular combustor

Turbine: single stage HP turbine (HPT), single stage IP turbine (IPT), 5-stage LP turbine (LPT)

Maximum thrust: 334.29 to 374.09 kN (75,152 to 84,098 lbf)

Overall pressure ratio: 37–39

Air mass flow: 1,204–1,245 kg (2,655–2,745 lb)/sec

Thrust-to-weight ratio: 5.46–6.11

Weight: 6,246 kg (13,770 lb)

Bourget Museum (ParisFrance)

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