Napier Gazelle

Gazelle
Napier Gazelle at the Royal Air Force Museum London
Type Turboshaft aero engine
Manufacturer D. Napier & Son
First run December 1955
Major applications Westland Wessex
Bristol/Westland Belvedere

The Napier Gazelle was a turboshaft engine 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
NGa.2
NGa.2(R)
[3]
NGa.2 series 2
NGa.13(R)
[3]
NGa.13 series 2
NGa.18
Mk.101
[3]
Mk.161
[3]
Mk.162
(NGa.13 series 2)[3]
Mk.165
[3]
Gazelle 501
[3]
Gazelle 503
[3]
Gazelle 512
[3]
Gazelle 514
[3]
Gazelle E.219
[3]

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

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.

Specifications (Gazelle 501 / Mk.101 / NGa.2(R))

Left view, Fleet Air Arm Museum, Australia

Data from Jane's All the World's Aircraft 1962-63 and Flightglobal archive.[3][4]

General characteristics

  • Type: Turboshaft
  • Length: 70 in (1,778 mm)
  • Diameter: 33.5 in (851 mm)
  • Dry weight: 830 lb (376.5 kg)

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, (DERD 2482 / 2485 / 2486 / 2488 / 2494)
  • Oil system: Pressure spray / splash with gear pump and dry sump, oil grade DERD.2487

Performance

See also

Comparable engines

Related lists

References

Notes

  1. ↑ "ENGLISH ELECTRIC-ROLLS ROYCE Napier Aero Engines Ltd." Times [London, England] 1 June 1961: 24. The Times Digital Archive. Web. 30 Aug. 2016.
  2. ↑ Napier Aero Engines Ltd (closure) Hansard, 8 March 1963 vol 673 cc921-32
  3. 1 2 3 4 5 6 7 8 9 10 11 12 Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
  4. ↑ Flightglobal online archive

Bibliography

  • Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
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