Snecma Silvercrest
| Type | Turbofan |
|---|---|
| National origin | France |
| Manufacturer | Snecma |
| First run | September 2012[1] |
| Major applications | Cessna Citation Longitude,[2] Dassault Falcon 5X[3] |
| Number built | 4 (as of October 2013)[4] |
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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,[5][6] the engine was originally designed as an 8,500- to 10,500-pound thrust turbofan[7] 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.[8] Since original development the thrust range has been raised and is currently quoted as 9,500 to 12,000 pounds of thrust.
The engine architecture includes a solid wide-chord swept fan with a 4-stage booster, followed by a 4 axial stage + 1 centrifugal stage high pressure compressor.[1] In early stage of the project, the overall pressure ratio was 27:1 with a core pressure ratio of "over 17".[9] The high pressure compressor is driven by a single stage turbine, while the 42.5-inch (1.08 m) fan is coupled to a 4-stage low pressure turbine.[1]
Turbomeca, which like Snecma is a part of the SAFRAN Group, participates in the design of the centrifugal compressor stage.[9]
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.[9][10]
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.[6][11] While a full engine demonstrator was due to run towards the end of 2008[citation needed], the FETT (First Engine To Test) started ground-based testing in September 2012.[1][12] Flight tests are to be conducted from the last quarter of 2013 on a Grumman Gulfstream II in Istres.[13]
Engine certification, originally pencilled in for the end of 2010 or early 2011,[9] has been re-scheduled for 2015.[1] Availability was planned towards 2012.[14]
Applications
- Silvercrest SC-2C[15]
- Cessna Citation Longitude ; engine selection was announced in May 2012 by Cessna.[16]
- 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.[17]
Specifications
General characteristics
- Type: axial and centrifugal flow, twin-shaft, bypass turbofan engine[9]
- Length: approx. 74 inches (1,900 mm)[9]
- Diameter: Fan: 42.5 inches (1,080 mm)[12]
- Dry weight:
Components
- Compressor: Low pressure: 1 axial fan + 4 axial stages, High pressure: 4 axial stages + 1 centrifugal stage[9]
- Turbine: Low pressure: 3 axial stages, High pressure: 1 axial stage[9]
Performance
- Maximum thrust: 9,500 to 12,000 lbf[8]
- Overall pressure ratio: approx. 27 [9]
- Bypass ratio: 5.9:1 [18]
- Power-to-weight ratio:
| Model | SC-2C | SC-1D |
|---|---|---|
| Thrust | Over 11,000 lbf (49 kN)[15] | 11,450 lbf (50.9 kN)[17] |
| Application | Cessna Citation Longitude | Dassault Falcon 5X |
| Entry into service | 2017 (planned)[19] | 2016 (planned)[12] |
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 1.3 1.4 Thierry Dubois (2013-10-31). "Snecma puts Silvercrest engine to test". AINonline.com. Retrieved 2013-07-22.
- ↑ Cessna (2012-05-14). "Cessna Announces Long-Range Citation Business Jet". Retrieved 2013-07-24.
- ↑ (French) "Le Dassault Falcon, cinquante ans de prouesses". Le Point. 2013-04-29. Retrieved 2013-07-14.
- ↑ "Four Silvercrest® bizjet engines now under test, with excellent initial results". Snecma. 2013-10-22. Retrieved 2013-10-24.
- ↑ "SILVERCREST: a new name in propulsion for business aviation". SAFRAN. 2006-10-17. Retrieved 2013-07-24.
- ↑ 6.0 6.1 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.
- ↑ 8.0 8.1 "Snecma Announces Silvercrest Core demonstrator First Parts Delivered". SAFRAN. 2007-05-22. Retrieved 2013-07-24.
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 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.
- ↑ 12.0 12.1 12.2 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.
- ↑ "Silvercrest, an innovative new bizjet engine". 2007-06-20. Retrieved 2008-01-12.
- ↑ 15.0 15.1 "Cessna Longitude". Cessna. Retrieved 2013-09-22.
- ↑
- ↑ 17.0 17.1 (French) "NBAA : Dassault lance le Falcon 5X". Air&Cosmos. Retrieved 2013-10-24.
- ↑ (French) "NBAA 2012 : Premiers essais au banc du Silvercrest". Air&Cosmos. 2012-11-02. Retrieved 2013-07-23.
- ↑ "Cessna Citation Longitude unvieled". Retrieved 27 May 2012.
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