The Engine

As a member of the RB211 family, the RB211-524 is built on sound fundamentals:

Three-shaft architecture
The three-shaft architecture, first introduced on the RB211-22B, allows an engine to have fewer stages giving a shorter, stiffer structure. This ambitious and innovative technology allows the rotors to run to their optimum speeds thereby reducing the need for compressor variable guide vanes.

Wide-chord fan
The innovative wide-chord fan blades, well known across the Trent family originated on the RB211-524G/H engine in the 1980s. This technology allows a reduction in the number of fan blades, increasing efficiency, reducing noise and gives unrivalled protection against foreign object damage.

Incorporating Trent technology
Through the Rolls-Royce concept of family designs, the RB211-524G/H was upgraded with 04 module HP (high pressure) technology developed on the Trent 700 engine family in 1997.

In the RB211-524G/H-T the HP turbine system is designed to operate at Trent 700 temperatures that are significantly higher than the RB211-524. As a result of this, the engine is able to better retain its performance characteristics throughout its service life.

• The benefits of the -T on the Boeing 747-400 are:
  • 2% lower fuel burn.
  • Longer lives on wing - through lower operating temperatures, increased margin and higher capability hardware in the core.
  • Lower weight – over 200 lb per engine.
  • Lower emissions – 40% lower NOx.
  • Lowest maintenance cost - through longer lives and better capability hardware.
  • Best performance retention.

Best environmental credentials
The Trent-style combustor reduces NOx emissions by 40 per cent, making the RB211-524G/H-T the engine with the lowest NOx emissions on the Boeing 747-400.

The RB211-524G/H-T was certified in 1997 with significant margin to all environmental emissions regulations and Chapter 3 noise limits on both the Boeing 747 and Boeing 767 aircraft.

For more information on Rolls-Royce, our products and the environment, please see our report “Powering a better world”.

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Superior economics
The RB211-524G/H offers full commonality and engine changeability for a Boeing 747 and Boeing 767 mixed fleet. This results in lower spares holdings and the lowest possible cost of ownership. The RB211-524G/H-T was cleared for use on the Boeing 767 early in 2001