Armstrong Siddeley Adder

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The Armstrong-Siddeley Adder was an early British turbojet engine developed by the Armstrong Siddeley company and first run in November 1948.

The Adder, a pure-jet derivative of the Armstrong Siddeley Mamba, was originally developed as an expendable engine to power the Jindivik 1 target drone. The engine was then developed into a longer-life engine before evolving into the more-powerful Armstrong Siddeley Viper.

The Adder was flight tested in the tail of the Avro Lancaster III SW342, the aircraft also having been previously modified and used for icing trials of the Mamba by Armstrong Siddeley's Flight Test Department at Bitteswell.

[edit] Specifications (Adder)

General characteristics

• Type: Turbojet
• Length: 73.3 in
• Diameter: 28 in
• Dry weight: 550 lb

Components

• Compressor: Axial Flow

Performance

• Thrust: 1,050 lb
• Power-to-weight ratio:

[edit] References

• Turbine Test Beds by Brian Turpin - Part one - Aeroplane Monthly February 1980 issue

[edit] See also

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