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.
- NGa.2 series 2
- NGa.13 series 2
- (NGa.13 series 2)
- Gazelle 501
- Gazelle 503
- Gazelle 512
- Gazelle 514
- Gazelle E.219
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.
Specifications (Gazelle 501 / Mk.101 / NGa.2(R))
Data from Jane's All the World's Aircraft 1962-63 and Flightglobal archive.
- Type: Turboshaft
- Length: 70 in (1,778 mm)
- Diameter: 33.5 in (851 mm)
- Dry weight: 830 lb (376.5 kg)
- 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
- Comparable engines
- Related lists
- 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.