Napier Gazelle
Template:Short description Template:Use dmy dates Template:Use British English
The Napier Gazelle is a turboshaft helicopter engine that was manufactured by D. Napier & Son in the mid-1950s. In 1961 production was nominally transferred to a joint venture with Rolls-Royce called Napier Aero Engines Limited.[1] But the venture closed two years later.[2]
Variants
- NGa.1
- Emergency rating Template:Cvt at 20,400 rpm, 1 hour rating Template:Cvt at 19,800 rpm, Max continuous rating Template:Cvt at 19,000 rpm[3]
- NGa.2
- Emergency rating Template:Cvt at 20,400 rpm[3]
- NGa.2(R)
- [4]
- NGa.2 series 2
- NGa.3
- Emergency rating Template:Cvt at 20,400 rpm[3]
- NGa.4
- Emergency rating Template:Cvt at 20,400 rpm[3]
- NGa.13(R)
- [4]
- NGa.13 series 2
- NGa.18
- NGa.22
- Mk.101
- [4]
- Mk.161
- [4]
- Mk.162
- (NGa.13 series 2)[4]
- Mk.165
- [4]
- Gazelle 501
- [4]
- Gazelle 503
- [4]
- Gazelle 512
- [4]
- Gazelle 514
- [4]
- Gazelle E.219
- [4]
Applications
These helicopter engines were used on the Westland Wessex HAS 1 and HAS 3 (other versions of the Wessex had two Rolls-Royce Gnome engines) and the Bristol Belvedere (later Westland Belvedere) transport helicopter.
Engines on display
Script error: No such module "Unsubst". A preserved Napier Gazelle is on display at the Royal Air Force Museum London. A preserved Napier Gazelle from a Westland Wessex helicopter is on display at the Queensland Air Museum, Caloundra, Australia. A Napier Gazelle is on display at the South Yorkshire Aircraft Museum, Doncaster A further Napier Gazelle is displayed at the Solent Sky Museum, Southampton
Specifications (Gazelle 501 / Mk.101 / NGa.2(R))
Data from Jane's All the World's Aircraft 1962-63 and Flightglobal archive.[4][5]
General characteristics
- Type: Turboshaft
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- Diameter: Script error: No such module "convert".
- Dry weight: Script error: No such module "convert".
Components
- Compressor: 11-stage axial flow
- Combustors: 6 flame tubes
- Turbine: 2-stage gas generator power turbine + 1-stage free power turbine
- Fuel type: Aviation kerosene
- Oil system: Pressure spray / splash with gear pump and dry sump
Performance
- Maximum power output: Script error: No such module "convert". + Script error: No such module "convert". thrust at 3,000 output shaft rpm, maximum rating for 2.5 minutes
- Overall pressure ratio: 6.25:1
- Air mass flow: Script error: No such module "convert".
- Specific fuel consumption: 0.688 lb/(hp h) (0.4185 kg/(kW h))
- Power-to-weight ratio: 1.458 hp/lb (2.397 kW/kg)
See also
Comparable engines
Related lists
References
Notes
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- ↑ "ENGLISH ELECTRIC-ROLLS ROYCE Napier Aero Engines Ltd." Times [London, England] 1 June 1961: 24. The Times Digital Archive. Web. 30 Aug. 2016.
- ↑ Napier Aero Engines Ltd (closure) Hansard, 8 March 1963 vol 673 cc921-32
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ a b c d e f g h i j k l Script error: No such module "citation/CS1".
- ↑ Flightglobal online archive
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Bibliography
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- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. Template:ISBN
- Script error: No such module "citation/CS1".