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Flugwerft Schleissheim

Turboshaft Engine

Double Mamba

It consists of two individual "Mamba" type engines which drive two coaxial opposed airscrews.

Photo: Deutsches Museum

Each individual engine propels its own airscrew by means of a gear. Each propulsion unit is operable on its own. The advantage of this type of propulsion is that one engine can be switched off to save fuel on long-distance flights without producing asymmetrical thrust.

In April 1946 at the British firm "Armstrong-Siddley", the "Mamba" engine was tested on a test stand for the first time. The "Double Mamba" version was flown for the first time in September 1949. The British Navy aircraft Fairey "Gannet" that was also used by the German Navy, was equipped with the "Double Mamba" engine.

Technical specifications:

  • Manufacturer: Bristol Siddeley Engines Ltd. England, around 1960
  • 10-stage, axial compressor; 6 individual combustion chambers; 3-stageturbine   
  • Take-off rating: 2050 kW (2740 hp) + 3450 residual thrust
  • Normal power output: 1800 kW (2400 hp) + 3300 N residual thrust
  • Rotational speed: 15000 RPM
  • Compression ratio: 5.35:1