Rolls-Royce Gem
Template:Short description Template:Use dmy dates Template:Use British English
| Gem | |
|---|---|
| Script error: No such module "InfoboxImage". | |
| Rolls-Royce Gem at The Helicopter Museum (Weston) |
The Rolls-Royce Gem is a turboshaft engine developed specifically for the Westland Lynx helicopter in the 1970s. The design started off at de Havilland Engine division (hence the name starting with "G") and passed to Bristol Siddeley as the BS.360. Rolls-Royce bought out Bristol Siddeley in 1966 and after it dropped the Bristol Siddeley identity the engine became the RS.360.[1]
Design and development
The Gem's three-shaft engine configuration is rather unusual for turboshaft/turboprop engines. Basic arrangement is a four-stage axial LP (Low Pressure) compressor, driven by a single stage LP turbine, supercharging a centrifugal HP (High Pressure) compressor, driven by a single stage HP turbine. Power from a two-stage free (power) turbine is delivered to the load via a third shaft. A reverse flow combustor is featured.[2]
The Gem 42 develops Script error: No such module "convert". at Take-off, Sea Level Static, ISA, but the Maximum Contingency Rating (MCR) is Script error: No such module "convert"..
Until recently all versions of the Lynx have been Gem powered. However, now that Rolls-Royce owns Allison, it has been marketing the more modern LHTEC T800, developed jointly with Honeywell.
Applications
Engines on display
- East Midlands Aeropark
- Midland Air Museum
- The Helicopter Museum (Weston)
- 111 (Sunderland) Squadron ATC
- South Yorkshire Aircraft Museum
Specifications (Gem 42)
Data from Rolls-Royce[3]
General characteristics
- Type: Triple-shaft two-spool turboshaft
- Length: 43.4 in (1090 mm)
- Diameter: 23.5 in (590 mm)
- Dry weight: 414 lb (187 kg)
Components
- Compressor: 4-stage axial LP, single-stage centrifugal HP
- Turbine: 2-stage power turbine, single-stage LP, single-stage HP
Performance
- Maximum power output: 1,000 shp (746 kW)
- Overall pressure ratio: 12:1
- Air mass flow: 7 lb/sec
See also
Comparable engines
Related lists
References
Notes
<templatestyles src="Reflist/styles.css" />
- ↑ Gunston 1989, p. 155.
- ↑ Rolls-Royce Gem product page
- ↑ Rolls-Royce Gem 42 factsheet Template:Webarchive www.rolls-royce.com. Retrieved: 16 July 2009
Script error: No such module "Check for unknown parameters".
Bibliography
<templatestyles src="Refbegin/styles.css" />
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. Template:ISBN
- Script error: No such module "Citation/CS1".
External links
Template:RRaeroengines
Script error: No such module "Navbox".
Template:DHaeroengines