Snecma Silvercrest
| Silvercrest | |
|---|---|
 | |
| The engine on display at Paris Air Show 2013 | |
| Type | Turbofan |
| National origin | France |
| Manufacturer | Snecma |
| First run | September 2012[1] |
| Major applications | Cessna Citation Longitude Dassault Falcon 5X |
| Number built | 7 (as of Summer 2014)[2] |
| Program cost | US$ 500-600 million (2008 information)[3] |
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The Snecma Silvercrest is a French turbofan currently under development which will be manufactured by Snecma.
Design and development
Announced at the 2006 NBAA convention,[4][5] the engine was originally designed as an 8,500- to 10,500-pound thrust turbofan[6] to power super mid-size to large cabin business jets or 40 to 60-seat regional jets with a MTOW between 45,000 and 60,000 lb.[7] Since original development the thrust range has been raised and is currently quoted as 9,500 to 12,000 pounds of thrust.
The two-shaft engine architecture includes a 42.5-inch (1.08 m) fan with solid wide-chord swept blades, followed by 4 boost stages, all driven by a 4-stage low pressure turbine. The HP spool has 4 axial compressor stages and 1 centrifugal stage, driven by a single-stage turbine.[1]
Turbomeca, which like Snecma is a part of the SAFRAN Group, participates in the design of the centrifugal compressor stage.[8]
Early design featured a smaller 40-inch fan, no booster, one more high-pressure compressor stage, one low-pressure turbine stage less and a lower 4.5 bypass ratio.[8][9] At an early stage of the project, the overall pressure ratio was 27:1 with a core pressure ratio of "over 17".[8]
The high pressure spool and combustor have been run in a US$ 120 million core-demonstrator called SM-X, reaching the take-off speed of 20,300rpm.[5][10] While a full engine demonstrator was due to run towards the end of 2008, the FETT (First Engine To Test) started ground-based testing in September 2012.[1][11] After a 6+ month delay, the in-flight tests started mid-2014 on a Grumman Gulfstream II and should take place in Istres.[12][13]
Engine certification, originally pencilled in for the end of 2010 or early 2011,[8] has been re-scheduled for the first half of 2016.[14] Availability was planned towards 2012.[15]
Applications
- Silvercrest SC-2C[16]
- Cessna Citation Longitude ; engine selection was announced in May 2012 by Cessna.[17]
- Silvercrest SC-1D
- Dassault Falcon 5X ; both aircraft and official engine selection were simultaneously unveiled at the National Business Aviation Association annual convention in October 21, 2013.[18]
Specifications
General characteristics
- Type: axial and centrifugal flow, twin-shaft, bypass turbofan engine[8]
- Length: approx. 74 inches (1,900 mm)[8]
- Diameter: Fan: 42.5 inches (1,080 mm)[11]
- Dry weight:
Components
- Compressor: Low pressure: 1 axial fan + 4 axial stages, High pressure: 4 axial stages + 1 centrifugal stage[8]
- Turbine: Low pressure: 3 axial stages, High pressure: 1 axial stage[8]
Performance
- Maximum thrust: 9,500 to 12,000 lbf[7]
- Overall pressure ratio: 38.5[19]
- Bypass ratio: 5.9:1[20]
- Power-to-weight ratio:
| Model | SC-2C | SC-1D |
|---|---|---|
| Thrust | Over 11,000 lbf (49 kN)[16] | 11,450 lbf (50.9 kN)[18] |
| Application | Cessna Citation Longitude | Dassault Falcon 5X |
| Entry into service | 2017 (planned)[21] | 2016 (planned)[11] |
See also
- Comparable engines
- Related lists
References
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Wikimedia Commons has media related to Snecma Silvercrest. |
- ↑ 1.0 1.1 1.2 Thierry Dubois (2013-10-31). "Snecma puts Silvercrest engine to test". AINonline.com. Retrieved 2013-07-22.
- ↑ "ENGINES SPECIAL REPORT: SNECM". "EVA INTERNATIONAL MEDIA LTD". 2014. Retrieved 2015-02-10.
- ↑ "Snecma va investir 600 millions de dollars dans le Silvercrest" (in French). L'usine nouvelle. 2008-01-30. Retrieved 2014-09-05.
- ↑ "SILVERCREST: a new name in propulsion for business aviation". SAFRAN. 2006-10-17. Retrieved 2013-07-24.
- ↑ 5.0 5.1 John Morris (October 17, 2006). "Snecma Launches Its Silvercrest Engine". ShowNews NBAA 2006 (Aviation Week). p. 78. Retrieved 2013-07-23.
- ↑ Jeff Apter (2006-11-30). "Snecma develops new bizav engine". AINonline. Retrieved 2013-07-23.
- ↑ 7.0 7.1 "Snecma Announces Silvercrest Core demonstrator First Parts Delivered". SAFRAN. 2007-05-22. Retrieved 2013-07-24.
- ↑ 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 Thierry Dubois (2007-05-22). "Snecma Silvercrest core engine set for first run". AINonline.com. Retrieved 2013-07-24.
- ↑ Thierry Dubois (2007-04-30). "Snecma Silvercrest core to run later this year". AINonline.com. Retrieved 2013-07-24.
- ↑ Thierry Dubois (2008-05-20). "Snecma Silvercrest engine completes core tests". Retrieved 2013-07-24.
- ↑ 11.0 11.1 11.2 Ian Goold (2013-05-20). "Snecma Close To Second Application For Silvercrest". AINonline. Retrieved 2013-07-22.
- ↑ Dominic Perry (23 May 2013). "EBACE: Snecma eyes maiden Silvercrest sortie in fourth quarter". Flightglobal. Retrieved 2013-07-23.
- ↑ Thierry Dubois (2014-07-15). "Snecma Begins Flight-testing Silvercrest on Modified Gulfstream II". AINonline.com. Retrieved 2014-07-17.
- ↑ "Snecma Silvercrest Schedule Slips into 2016". AINonline.com. 2015-03-12. Retrieved 2015-04-18.
- ↑ "Silvercrest, an innovative new bizjet engine". 2007-06-20. Retrieved 2008-01-12.
- ↑ 16.0 16.1 "Cessna Longitude". Cessna. Retrieved 2013-09-22.
- ↑
- ↑ 18.0 18.1 "NBAA : Dassault lance le Falcon 5X" (in French). Air&Cosmos. Retrieved 2013-10-24.
- ↑ ((http://www.snecma.com/IMG/files/fiche_silvercret_ve_2013_vnbaa_hd_modulvoir_file_fr.pdf))
- ↑ "NBAA 2012 : Premiers essais au banc du Silvercrest" (in French). Air&Cosmos. 2012-11-02. Retrieved 2013-07-23.
- ↑ "Cessna Citation Longitude unveiled". Retrieved 27 May 2012.
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