The Mamba was Armstrong-Siddeley's gas turbine turboprop engine design of around 1,500hp. It was used for the Short Seamew.

The Mamba was developed into the form of the Armstrong-Siddeley Double Mamba on the Fairey Gannet anti-submarine aircraft developed for the Royal Air Force.

Engine starting was by cartridge.

The Mamba has the distinction of being the first turboprop engine to power the Douglas Dakota. In 1949, a Dakota testbed aircraft was converted by Armstrong-Siddeley to take two Mambas. (This aircraft was later re-converted to take the original engines.)

The Mamba was produced in various series. The numbering followed the convention:
AS = Armstrong-Siddeley
M = Mamba
num = model

Specifications

For ASM.1

Cycle: (unknown)

Compression ratio: (unknown)

Power: 1,590 hp (1,186 kW)

Weight: (unknown)