Napier Gazelle

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Gazelle
NapierGazelle.JPG
Napier Gazelle at the Royal Air Force Museum London
Type Turboshaft aero engine
Manufacturer Napier Aero Engines Ltd
First run December 1955
Major applications Westland Wessex
Bristol/Westland Belvedere

The Napier Gazelle was a turboshaft engine manufactured by Napier Aero Engines in the mid-1950s, production ceased when the Napier company was taken over by Rolls-Royce in 1962.[1]

Variants[edit]

NGa.1
NGa.2
NGa.2(R)
[2]
NGa.2 series 2
NGa.13(R)
[2]
NGa.13 series 2
Mk.101
[2]
Mk.161
[2]
Mk.162
(NGa.13 series 2)[2]
Mk.165
[2]
Gazelle 501
[2]
Gazelle 503
[2]
Gazelle 512
[2]
Gazelle 514
[2]
Gazelle E.219
[2]

Applications[edit]

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[edit]

A preserved Napier Gazelle is on display at the Royal Air Force Museum London.

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

Data from Jane's All the World's Aircraft 1962-63 and Flightglobal archive.[2][3]

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[edit]

Comparable engines
Related lists

References[edit]

Notes[edit]

  1. ^ Gunston 1989, p.107.
  2. ^ a b c d e f g h i j k l Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd. 
  3. ^ Flightglobal online archive

Bibliography[edit]

  • 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. 

External links[edit]