The Siddeley Tiger was an unsuccessful British

aero engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many ...

developed shortly after the end of

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...

by Siddeley-Deasy. Problems encountered during flight testing caused the project to be cancelled.

Design and development

Developed using two modified cylinder banks from the Siddeley Puma, the Tiger was a liquid-cooled 60-degree

V12 engine A V12 engine is a twelve- cylinder piston engine where two banks of six cylinders are arranged in a V configuration around a common crankshaft. V12 engines are more common than V10 engines. However, they are less common than V8 engines. The ...

with the advanced feature of an electric starter motor protected by a friction clutch. A reduction gear arrangement was provided for the propeller drive with a

ratio In mathematics, a ratio shows how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ...

of 0.559:1. The company claimed a power output of 600 hp (447 kW) but this was regarded as optimistic.Gunston 1989, p.18. Flight testing by a

Royal Aircraft Establishment The Royal Aircraft Establishment (RAE) was a British research establishment, known by several different names during its history, that eventually came under the aegis of the UK Ministry of Defence (MoD), before finally losing its identity in me ...

test pilot,

Frank Courtenay Frank or Franks may refer to: People * Frank (given name) * Frank (surname) * Franks (surname) * Franks, a medieval Germanic people * Frank, a term in the Muslim world for all western Europeans, particularly during the Crusades - see Farang Curre ...

, revealed problems and his opinion of the engine was low as the following quote shows:

Application and cancellation

The Tarrant Tabor, a giant triplane bomber was designed to use the Tiger but redesigned to use other engines when it became clear the Tiger would not be available soon enough. The only aircraft in which the Siddeley Tiger flew was the ill-fated prototype of the twin-engined

Siddeley-Deasy Siniai The Siddeley-Deasy Sinaia, also known as the Armstrong Whitworth Sinaia was a twin-engined biplane day bomber with gunners in rearwards extensions of the engine nacelles. Two examples were ordered by the Air Ministry but only one was completed. ...

of which three were planned to be produced. Major problems with both the engines and this experimental bomber aircraft led to cancellation of the projects.Lumsden 2003, p.87. The Siddeley Tiger marked the end of the aero engine line started by Beardmore and Siddeley-Deasy. The name was later re-used for an Armstrong Siddeley

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ...

Specifications (Tiger)

References

Notes

Bibliography

* Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. * Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .

External links

* Contemporary technical description of the engine with photographs. {{ASaeroengines

Tiger The tiger (''Panthera tigris'') is the largest living cat species and a member of the genus '' Panthera''. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily preys on ...

1920s aircraft piston engines