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Armstrong Siddeley Double Mamba

1940s British turboprop aircraft engine

Field	Value
name	Double Mamba
image	File:ASDoubleMamba.JPG
caption	Preserved Double Mamba at the Imperial War Museum Duxford
engine_type	Turboprop
manufacturer	Armstrong Siddeley
first_run	29 September 1949 (First flight)
major_applications	Fairey Gannet
developed_from	Armstrong Siddeley Mamba

The Armstrong Siddeley Double Mamba is a turboprop engine design developed in the late 1940s of around 3000-4000 hp. It was used mostly on the Fairey Gannet anti-submarine aircraft developed for the Fleet Air Arm of the Royal Navy.

Design and development

The Double Mamba (rarely known as the Twin Mamba) was a development of the Armstrong Siddeley Mamba with two Mambas driving contra-rotating propellers through a combining gearbox.

Engine starting was by cartridge; forced air restart was possible in flight. One engine could be shut down in flight to conserve fuel. Shutting down one engine also stopped one of the propellers.

Variants

Fairey Gannet flying with one half of its Double Mamba engine shut down

;ASMD.1:2,950 shp (2 x ASMa.3) used on Fairey Gannet A.S. Mk.1 and Blackburn B-88 ;ASMD.3:3145 shp (2 x ASMa.5) used on Fairey Gannet A.S. Mk.4 ;ASMD.4:3875 hp (2 x ASMa.6) used on Fairey Gannet AEW Mk.3 ;ASMD.8:3875 hp (2 x ASMa.6) used on Fairey Gannet AEW Mk.3

Applications

Blackburn B-88
Fairey Gannet
Fairey Gannet AEW The Double Mamba engine was also proposed for the Westland Westminster, a 30-seat helicopter that was later built as a prototype powered by a pair of Napier Eland E220 turboshaft engines.

Engines on display

Preserved Double Mamba engines are on public display at the:

Australian National Aviation Museum
Deutsches Museum Flugwerft Schleissheim
Gatwick Aviation Museum
South Yorkshire Aircraft Museum
Imperial War Museum Duxford
Midland Air Museum
Queensland Air Museum
East Midlands Aeropark
Museum of Berkshire Aviation

Specifications (ASMD.3)

References

Notes

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.

References

Gunston 1989, p.20.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

1940s-turboprop-engines armstrong-siddeley-aircraft-engines

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