Moorabbin Air Museum
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Armstrong Siddeley Double Mamba

Picture
The Armstrong Siddeley Double Mamba was a turboprop aircraft engine developed from the Armstrong Siddeley Mamba engine in the late 1940s. It was produced in four variants ranging in power output from the ASMD.1 of 2,950shp to the ASMD.8 of 3,870shp, and was basically two Mamba engines joined side by side driving two four blade contra rotating propellers on a single hub through a common gearbox. 

The engine was predominently used in the Fairey Gannet an aircraft carrier borne anti-submarine aircraft that was  developed for the Fleet Air Arm of the Royal Navy(RNFAA), and featured the ability for one engine to be shut down in flight to extend an aircraft's endurance giving it single engine economy and twin engine performance.
Static starting was with a cartridge in a Rotax starter, Re-starting in flight used air speed air pressure.
​
The Fleet Air Arm of the Royal Australian Navy(RANFAA) purchased thirty six Fairey Gannets that included the Museum's machine XG789, and were powered by the ASMD.1 engine and served on the HMAS Melbourne.




TECHNICAL DATA
Length                                   
Diameter
Compressor
Combustors
Maximum Power
Overall pressure ratio
Power to weight ratio
​Weight



102.25in (2.597m)
52.8in (1.341m)
​10 stage axial (double)
Six combustion chambers (x2)
2,960eshp
5.35/1
1.36lbs/lb
2,170 lbs  (984 kgs)


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  • Home
  • ABOUT
    • News
    • History
  • Community Engagement
    • Legends of The Skies
  • Birthdays & Functions
  • Our Collection
    • CATEGORIES >
      • ENGINES
      • COMMONWEALTH AIRCRAFT CORPORATION
      • D.A.P / G.A.F.
      • R.A.A.F. / R.A.N. / ARMY
      • COMMERCIAL AIRCRAFT
      • KIT AIRCRAFT
      • OTHER AIRCRAFT
      • GLIDERS
  • membership
  • ONLINE SHOP
  • Support the Museum
    • Donations
    • EMPLOYEE GIVING
    • Our Supporters
  • Getting There
  • Contact