Rolls-Royce Trent 700
| Trent 700 | |
|---|---|
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| |
| The Airbus A330's nacelle features a common nozzle assembly | |
| Type | Turbofan |
| National origin | United Kingdom |
| Manufacturer | Rolls-Royce |
| First run | August 1992[1] |
| Major applications | Airbus A330 Airbus Beluga XL Airbus A330 MRTT |
| Developed from | Rolls-Royce RB211 |
| Developed into | Trent 800 |
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The Rolls-Royce Trent 700 is a high-bypass turbofan aircraft engine produced by Rolls-Royce plc to power the Airbus A330. Rolls-Royce was studying a RB211 development for the A330 at its launch in June 1987. It was first selected by Cathay Pacific in April 1989, first ran in summer 1992,[1] was certified in January 1994[3] and was put into service on 24 March 1995. Keeping the characteristic three-shaft architecture of the RB211, it is the first variant of the Trent family. With its 97.4 in (247 cm) fan for a 5:1 bypass ratio, it produces 300.3–316.3 kN (67,500–71,100 lbf) of thrust[3] and reaches an overall pressure ratio of 36:1.[2] It competes with the General Electric CF6-80E1 and the PW4000 to power the A330.
Development
[edit]When Airbus launched its A330 twin-jet in June 1987, its only engine options included the General Electric CF6-80C2 and the Pratt & Whitney PW4000.[4] Rolls-Royce was studying whether to launch a RB211-700, 65,000 lbf (290 kN) development of the RB211 for the A330, the long-range Boeing 767 and McDonnell Douglas MD-11, derived from the Boeing 747-400's -524D4D, with growth potential to 70,000 lbf (310 kN).[5] By June 1988, Rolls-Royce was investing over $540 million to develop the uprated RB-211-524L with a new 95 in (240 cm) fan up from 86 in (220 cm) for the -524G/H and a fourth LP turbine stage up from three, targeting 65,000 to 70,000 lbf (290 to 310 kN).[6]
In April 1989, Cathay Pacific ordered ten A330s, powered by 65,000 lbf (290 kN) RB211-524L engines and with room to grow to 80,000 lbf (360 kN), a first for Rolls-Royce on an Airbus aircraft.[7] In June 1989, TWA confirmed an order for twenty A330s and selected the RB211-524L Trent engine for $620 million (15.5 million each), rated for 74,000 lbf (330 kN).[8]
By February 1992, design work was completed for the 97.4 in (247 cm) fan, 67,000–72,000 lbf (300–320 kN) Trent 700 and the first test was scheduled for July.[9] By then, the earlier 94.6 in (240 cm) fan, 65,000–67,000 lbf (290–300 kN) Trent 600 for the MD-11 was abandoned due to lack of customers.[9] By September, the first engine was running and was to be joined by five others by the end of the year.[1] Certification was applied for on 30 June 1991 and was granted on 24 January 1994.[3] The first Trent 700-powered A330 flew in August 1994, and Cathay Pacific introduced it in March 1995.[10] 90-minutes ETOPS approval was achieved in March 1995, and this was extended to 120 minutes in December 1995 and 180 minutes in May 1996.[11] The Trent 700 was the third engine to market on the A330, after GE and PW.
Design
[edit]The Trent 700 is an axial flow, high bypass turbofan with three coaxial shafts. The fan has 26 Wide Chord Blades and is powered by a 4-stage low pressure turbine. The 8-stage IP compressor and 6-stage HP compressor are both driven by a single stage turbine, and the single annular combustor has 24 Spray Nozzles. The engine is controlled by an EEC.[3]
Operational history
[edit]By July 1999, the Trent had secured a nearly 40% share of engine orders for the A330.[12]
In 2009, Rolls-Royce introduced an upgraded version of the engine dubbed the Trent 700EP (enhanced performance) which incorporated a package of improvements derived from later members of the Trent engine family (especially the Trent 1000). These included elliptical leading edges and optimised fan and high-pressure turbine tip clearances.[13] Together the improvements provided a 1.2% improvement to the Trent 700's specific fuel consumption. Some of the improvements were also made available as a retro-fit kit to existing airlines.[14]
Further upgrades were announced in 2013 as part of the T700EP2 package (EIS in late 2016[10]). The upgraded engine was to be available in 2015, intended for higher gross weight A330s. The upgrade package was to improve fuel efficiency by about 1% and was likely to be the last upgrade of Trent 700. It was also potentially to be made available as a retrofit package in the future.[15]
Rolls-Royce claims that the Trent 700 has the lowest life cycle fuel burn, and is the quietest and cleanest engine available on the A330.[16] Cathay Pacific is the largest operator, with 31 Trent 700-powered A330s. Rolls received orders for 140 of the type during the Paris Air Show in June 2007.
By July 2018, the Trent 700 had flown 50 million hours[17] and Rolls-Royce claimed a 60% market share.[10] By June 2019, an Aeroflot Airbus A330-343's Trent 700 engine which had entered service in 2008 had completed over 50,000 hours without requiring an overhaul – a record for a widebody engine.[18]
Applications
[edit]Variants
[edit]- Trent 768-60
- Certified in January 1994, rated at 67,500 lbf (300 kN) for take-off.[3] Used on the Airbus A330-341 variant.
- Trent 772-60
- Certified in March 1994, rated at 71,100 lbf (316 kN) for take-off.[3] Used on the Airbus A330-342 variant.
- Trent 772B-60
- Certified in September 1997, rated at 71,100 lbf (316 kN) for take-off, produces additional thrust compared to the 772-60 between 610m (2,000ft) and 2440m (8,000ft).[3] Used on the Airbus A330-243 and Airbus A330-343 variants.
- Trent 772C-60
- Certified in March 2006, rated at 71,100 lbf (316 kN) for take-off, produces additional thrust compared to the 772B-60 above 2440m (8,000ft).[3] Used on the Airbus A330-243 and Airbus A330-343 variants.
Specifications (Trent 700)
[edit]Data from EASA[3]
General characteristics
- Type: Three shaft high bypass ratio, axial flow, turbofan
- Length: 222.0 in (5.639 m)
- Diameter: 97.4 in (2.47 m)[2] (fan)
- Dry weight: 13,580 lb (6,160 kg)
Components
- Compressor: Single-stage fan with 26 wide-chord blades, eight-stage IP compressor, six-stage HP compressor
- Combustors: Single annular, 24-off Fuel Spray Nozzles
- Turbine: Single-stage HP turbine, single-stage IP turbine, four-stage LP turbine
Performance
- Maximum thrust: 67,500–71,100 lbf (300.3–316.3 kN)
- Overall pressure ratio: 36:1[2]
- Bypass ratio: 5.0:1[2]
- Specific fuel consumption: (cruise)[19]
- Trent 768‐60, 772‐60, 772B‐60, 772B‐60EP: 0.584 lb/(lbf⋅h) (16.5 g/(kN⋅s))
- Trent 772C‐60: 0.565 lb/(lbf⋅h) (16.0 g/(kN⋅s))
- Thrust-to-weight ratio: 4.97 - 5.24
See also
[edit]Related development
- Rolls-Royce Trent 7000 (successor)
Comparable engines
Related lists
References
[edit]Notes
[edit]- ^ a b c "Rolls ties global strategy to Trent engine family". Aviation Week. 14 September 1992. p. 72. Archived from the original on 17 July 2017. Retrieved 25 October 2019.
- ^ a b c d e "Trent 700 poster". Rolls-Royce. Archived from the original on 24 February 2016. Retrieved 28 July 2016.
- ^ a b c d e f g h i "Type-Certificate Data Sheet RB211 Trent 700 series engines" (PDF). EASA. 21 February 2019.
- ^ "German Government Commits Funds To Airbus A330/A340 Development". Aviation Week. 8 June 1987. p. 35.
- ^ "Rolls Examines Development of Rb211-700 Engine for Future Twinjet Aircraft". Aviation Week. 8 June 1987. p. 23. Archived from the original on 15 March 2022. Retrieved 25 October 2019.
- ^ "Rolls-Royce Will Invest $540 Million In Developing Uprated RB211 Version". Aviation Week. 20 June 1988. p. 30. Archived from the original on 15 March 2022. Retrieved 25 October 2019.
- ^ "Rolls-Royce Gains Access to Airbus Market With Cathay Pacific Engine Order". Aviation Week. 10 April 1989. p. 91. Archived from the original on 1 July 2017. Retrieved 25 October 2019.
- ^ "TWA Confirms Orders for 20 A330s, Selects Rolls Engine". Aviation Week. 26 June 1989. p. 91. Archived from the original on 15 March 2022. Retrieved 25 October 2019.
- ^ a b "Rolls-Royce Completes Design Work On Trent 700 Engine for A330, MD-12". Aviation Week. 17 February 1992. p. 67.
- ^ "Aero-Engines—Rolls-Royce Trent". Jane's. 13 February 2001. Archived from the original on 10 November 2007.
- ^ Harrison, Michael (8 July 1999). "Blow to Rolls as Boeing picks US rival". The Independent. Archived from the original on 30 October 2019. Retrieved 30 October 2019.
- ^ "DUBAI: R-R hands over 1,000th Trent 700 for A330". Flightglobal. 13 November 2011. Archived from the original on 26 August 2017. Retrieved 26 January 2012.
- ^ "EP new build improvements". Aviation Week. 28 March 2009. Archived from the original on 28 March 2020. Retrieved 26 January 2012.
- ^ Goold, Ian (18 June 2013). "Rolls-Royce Trent 700 Benefits From Technology Development Flow-Back". AINonline. Archived from the original on 18 May 2014. Retrieved 4 April 2014.
- ^ "Trent 700 Technology". Rolls-Royce. Archived from the original on 13 November 2020. Retrieved 27 September 2019.
- ^ "Rolls-Royce Trent 7000 gets ticket to fly as first production engines arrive in Toulouse" (Press release). Rolls-Royce. 20 July 2018. Archived from the original on 27 September 2007. Retrieved 21 July 2018.
- ^ "Rolls-Royce and Aeroflot celebrate engine record" (Press release). Rolls-Royce. 19 June 2019. Archived from the original on 23 December 2022. Retrieved 26 June 2019.
- ^ IBA Group Limited (March 2020). Engine values book (PDF). p. 7.24. Archived (PDF) from the original on 17 May 2021. Retrieved 17 May 2021.
External links
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