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UNITED KINGDOM

ADDER

Armstrong-Siddeley

Armstrong-Siddeley Motors was formed in 1919 when Armstrong Whitworth Development Company bought Siddeley-Deasy, which had built aircraft engines during WWI.
In 1935 Armstrong-Siddeley Motors became a subsidiary of Hawker Siddeley, which merged with the engine business of Bristol Aero Engines to become Bristol Siddeley in 1960, and then with Rolls-Royce in 1966.

The Adder was a pure jet version created in 1948 from the Armstrong Siddeley Mamba ASM3 airscrew gas-turbine by removal of the airscrew gearing. This resulting a very slender turbojet with a long air intake spinner housing the generator.

It was used to power two experimental aircraft :

  • The Swedish Saab 210
  • The Australian GAF Pika

Caractéristiques de l'Adder

ConstructeurArmstrong-Siddley
1er essais1948
Certification
TypeTurboréacteur à simple flux
Nb. construits

Dimensions

Diamètre711 mm28 in.
Longueur1863 mm73.3 in.

Masses

Non équipé250 kg550 lb
Equipékglb

Performances

Régime Maximum15 000 t/mn15,000 rpm
Régime max continu14 250 t/mn14,250 rpm
Régime au ralenti t/mnrpm
Puissance max500 kgp1,100 lb
Puissance max continu409 kgp900 lb
Puissance au ralentikgplb
Taux de compression / 1
Débit d'air max.g/slbs/sec
Température max cont.deg.Cdef.F

Consommations

Consommation au décollagekg/kg/hlb/lb/h
Consommation max continu1,2 kg/kg/h1.2 lb/lb/h

Thus, although the Adder found no commercial application, it proved to be a valuable point on the learning curve and the designers went on to develop the Viper turbojet.