Napier Gazelle

Gazelle
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.

Applications

These helicopter engines were used on the Westland Wessex HAS1 and HAS2 (The HAS3 having 2 Rolls Royce Gnome engines instead) 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 NGa.1)

Data from Flightglobal archive

General characteristics

• Type: Turboshaft
• Length: 70 in
• Diameter: 33.5 in
• Dry weight: 780 lb

Components

• Compressor: 11-stage axial flow
• Combustors: 6 flame tubes
• Turbine: 3-stage

Performance

• Maximum power output: 1,260 shp at 20,400 rpm
• Specific fuel consumption: 0.708
• Power-to-weight ratio:

See also

Comparable engines

• General Electric T58
• Rolls-Royce Gnome
  

Related lists

• List of aircraft engines
  

References

Bibliography

• Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9

External links

• Flight, July 1967, Napier Gazelle