Armstrong Siddeley Heritage Trust
Armstrong Siddeley Aero-Engines
Armstrong Siddeley started building aero-engines during WWI. Through the 1920s and 30s, they produced a range of air-cooled rotary piston engines. In the 1940s, they were at the forefront of jet engine development and went on to produce a successful range of turbojet and turboprop engines.
Following government intervention, Armstrong Siddeley was merged with Bristol Aero-Engines to form Bristol Siddeley, which was later absorbed into Rolls-Royce. This section covers the engines built by Armstrong Siddeley up to the time it became part of Bristol Siddeley.
Armstrong Siddeley Jaguar
Armstrong Siddeley Sapphire
In this section of the website, we intend to produce a detailed description of all of the Aero-Engines that Armstrong Siddeley produced. This is work in progress. The detailed web pages can be found by clicking on the appropriate green button. For all the other engines, there is a short description below the buttons.
Panther
The Jaguar, with its capacity increased to 27 litres.
Tiger
A further development of the Jaguar with its capacity further increased to 32.7 litres. It was the first British aero-engine to use a two-stage supercharger.
Ounce
A horizontally opposed, 3.2 litre radial engine that used two Jaguar cylinders.
Genet
A single-row, five-cylinder, air-cooled, 4.1-litre radial engine, it was a popular light aircraft powerplant.
Genet Major
A Genet with the capacity increased to 5.2 litres.
Civet
A Genet Major with a 7-cylinder engine with a capacity of 7.3 litres.
Mongoose
A single row 5-cylinder air-cooled radial engine with a capacity of 8.9 litres. It had an unusual configuration with the fifth cylinder at the bottom of the engine.
Serval
A two-row, 10-cylinder, air-cooled, 17.7 litre radial engine
Cougar
A single-row 9-cylinder air-cooled radial engine developed in 1945. One engine was tested, but it did not go into production.
Lynx
A single-row 7-cylinder air-cooled radial aero-engine that was in fact half of a Jaguar engine.
Cheetah
A development of the Lynx engine, initially known as the Lynx Major, with an increased bore but the same stroke as the Lynx. The Cheetah remained in production from 1935 to 1948. It was the first engine of its type to be certified for 1,200 hours of operational time between overhauls (TBO), with over 37,200 examples built.