| Silvercrest | |
|---|---|
| The turbofan at display in 2011 | |
| Type | Turbofan |
| National origin | France |
| Manufacturer | Snecma |
The Snecma Silvercrest is a French turbofan currently under development which will be manufactured by Snecma.
Announced at the 2006 NBAA convention[1]. The engine was originally designed as an 8,500- to 10,500-pound thrust turbofan[2] 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[3]. 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 without booster, followed by a 4 axial stage + 1 centrifugal stage high pressure compressor. The overall pressure ratio is 27:1 with a core pressure ratio of "over 17". The high pressure compressor is driven by a single stage turbine, while the 40-inch (1.0 m) fan is coupled to a 3-stage low pressure turbine[2].
The high pressure spool and combustor have been run in a core-demonstrator reaching the take-off speed of 20,300rpm[4]. A full engine demonstrator is due to run towards the end of 2008, while engine certification is pencilled in for the end of 2010 or early 2011[5] and should be available towards 2012[6]. As of January 2008, no aircraft manufacturer had selected this engine.
Turbomeca, which like Snecma is a part of the SAFRAN Group, participates in the design of the centrifugal compressor stage[5].
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