Armstrong Siddeley Adder

Adder
Type	Turbojet
Manufacturer	Armstrong Siddeley
First run	November 1948
Developed from	Armstrong Siddeley Mamba
Developed into	Armstrong Siddeley Viper

The Armstrong Siddeley Adder was an early British turbojet engine developed by the Armstrong Siddeley company and first run in November 1948.^[1]

Design and development

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 ASA.1 Adder was flight tested in the rear-turret position 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.

Applications

Specifications (Adder)

General characteristics

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

Components

Compressor: 10-stage Axial Flow
Combustors: six-can
Turbine: 2-stage axial
Fuel type: Aviation Kerosene

Performance

Maximum thrust: 1,050 lb
Overall pressure ratio: 5:1
Power-to-weight ratio:

References

Notes

↑ Gunston 1989, p. 20.

Bibliography

Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9

External links

Minijets website
"Adder" a 1951 Flight article

Armstrong Siddeley aero engines

Piston engines	Boarhound Cheetah Civet Cougar Deerhound Genet Genet Major Hyena Jaguar Jaguar Major Leopard Lynx Lynx Major Mongoose Ounce Panther Puma Serval Tiger (V12) Tiger (Radial) Wolfhound

Turbojets	Adder ASX Sapphire Viper

Turboprops	ASP Double Mamba Mamba Python

Rocket engines	Beta Snarler Screamer Stentor Gamma

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