Wolseley Viper
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The Wolseley Viper is a British-built, high-compression derivative of the Hispano Suiza HS-8 liquid-cooled V-8 engine, built under licence by Wolseley Motors during World War I.
It powered later models of the S.E.5a, SPAD VII and other British or British-built aircraft designed for the Hispano-Suiza.
Variants
- Wolseley W.4A Python I (1917)
- Template:Cvt – licence produced version of the Hispano-Suiza 8Aa with minor structural changes and the weight increased to Template:Cvt, retained the original's low compression Template:Cvt pistons and compression ratio of 4.7:1. Only 100 built.Template:SfnpTemplate:Sfnp
- Wolseley W.4A Python II
- Template:Cvt – high compression version of the Python I with high compression Template:Cvt pistons and compression ratio increased to 5.3:1.Template:Sfnp
- Wolseley W.4A* Viper (1918)
- Template:Cvt – broadly the equivalent of the Hispano-Suiza 8Ab, compression ratio of 5.3:1 (19 early production engines had a higher compression ratio of 5.6:1), with 200 hp English Hispano propeller hubs.Template:Sfnp
- Wolseley W.4B Adder I (1918)
- Template:Cvt – modified version of the Hispano-Suiza 8B.Template:SfnpTemplate:Sfnp
- Wolseley W.4B* Adder II
- Template:Cvt – modified and improved version of the Adder I.Template:Sfnp
- Wolseley W.4B* Adder III
- Template:Cvt – modified and improved version of the Adder II with balanced crankshaft.Template:Sfnp
Applications
- Airco DH.9
- Avro 552
- Bristol M.R.1
- Bristol Tourer
- Cierva C.8
- Martinsyde F.6
- Royal Aircraft Factory S.E.5a
- Sopwith Antelope
- Sopwith Cuckoo
Surviving engines
A Wolseley Viper powered Royal Aircraft Factory S.E.5a is owned by, and on display at The Shuttleworth Collection, Old Warden Aerodrome in the UK.[1]
Engines on display
- A preserved Wolseley Viper is on public display at the Science Museum, London.
- A preserved Wolseley Viper is on public display at the Museo Nacional de Aeronáutica de Argentina
Specifications (W.4A Viper)
Data from GunstonTemplate:Sfnp and LumsdenTemplate:Sfnp
General characteristics
- Type: 8-cylinder, upright, 90 degree Vee engine
- Bore: Template:Cvt
- Stroke: Template:Cvt
- Displacement: Template:Cvt
- Length: Template:Cvt
- Width: Template:Cvt
- Height: Template:Cvt
- Dry weight: Template:Cvt
Components
- Fuel system: Twin Zenith-Duplex carburettors
- Cooling system: Liquid-cooled
- Reduction gear: Direct drive, Right-hand tractor
Performance
- Power output: Template:Cvt
- Compression ratio: 5.3:1
See also
Related development
Comparable engines
Related lists
References
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Notes
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- ↑ The Shuttleworth Collection - SE5a Script error: No such module "webarchive". www.shuttleworth.org Retrieved: 09 March 2017.
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Bibliography
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