Rolls-Royce Trent 7000

Trent 7000
Type	Turbofan
National origin	United Kingdom
Manufacturer	Rolls-Royce Holdings
First run	27 November 2015
Major applications	Airbus A330neo
Unit cost	US$37.9M (2014 list price)
Developed from	Rolls-Royce Trent 1000

The Rolls-Royce Trent 7000 is the seventh iteration of the Trent family of large turbofan jet engine and is the exclusive engine for the Airbus A330neo. The Trent 7000 is based on the Trent 1000-TEN architecture from the Boeing 787 and the technology of the Trent XWB of the Airbus A350 XWB.

It succeeds the Trent 700 used for the Airbus A330, its selection was announced with the A330neo launch in July 2014. It first ran on 27 November 2015 on a test bed in Derby.

Although the first two test engines will be made in Derby, further test engines and production Trent 7000 will be assembled in Rolls-Royce Singapore facility. In 2015 Rolls experienced development problems with the Trent 1000 TEN, and had to involve extra resources to support the on-time March 2017 787-10 maiden flight but it led to delaying the Trent 7000. The first pair of engines were shipped to Airbus in June 2017.

Compared to the 20-year-older Trent 700, which was introduced in 1995, the larger fan, 112 inches (2.8 m) compared to 97 inches (2.5 m), associated with a smaller fan hub doubles the bypass ratio from 5 to 10. It has the highest bypass ratio of any Trent engine.

The overall pressure ratio increases from 36 to 50 thanks to Trent XWB core compressor technology, improving thermal efficiency. It implies 200-kelvin higher internal temperatures, handled by thermally coated high-pressure turbine blades, not needing more expensive ceramic matrix composites, which will be used in 2020 with the next Rolls-Royce engine generation. The larger fan and higher bypass ratio need a low-pressure turbine with two more stages; the engine will be 3,500 pounds (1,600 kg) heavier.

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