0-8-0
In the Whyte notation for the wheel arrangement of locomotives (primarily steam locomotives), an 0-8-0 is a locomotive with eight powered driving wheels (thus four powered axles), and neither leading wheels or trailing wheels. Locomotives of this type are also referred to as 'eight coupled'.
The equivalent UIC classification is D.
This configuration appeared early in locomotive development, as Ross Winans developed a series of 0-8-0 types for the Baltimore and Ohio Railroad starting in 1844. These locomotives were built for mainline haulage; later, however, the configuration was generally used for large switcher (UK: shunter) types, providing a powerful layout with all weight as adhesive weight and thus tractive effort and factor of adhesion were maximised. The layout was generally too large for smaller and lighter railways, where the more popular 0-6-0 wheel arrangement would often be found performing similar duties. Examples of the type were constructed both as tender locomotives and tank locomotives.
Examples include the numerous Q classes of the London and North Eastern Railway and the LNWR G2 'Super D' class. The type was also extremely popular in the USA where it was more commonly constructed as a tender locomotive and saw extensive use as a heavy switcher and freight engine.
South Africa
Commencing their service in 1929, some 14 locomotives of the S Class worked the yards mainly around Johannesburg. In early 1980 several worked the yards in Cape Town. Originally operated with 215p.s.i.(1 480kPa) the factor of adhesion proved too low for the 45,000lb tractive effort and they tended to slip. The boiler pressure was lowered to 170 p.s.i.( 1 170kPa)which gave a reduced tractive effort of 35,890 lb.
A second class of 0-8-0, the S1, appeared after 1949. The first of 12 engines were South African built and a further order of 25 came from North British Locomotive Co. These engines developed 38,000lbs of tractive effort and worked around the Germinston area.
References
- South African Government, South Africa - Last Stronghold of Steam, Kimberley, 1978.
External links
- LNER 0-8-0 locomotives in a catalogue of LNER locomotive types
- 0-8-0 an article by Neil Carlson in Classic Trains magazine on the 0-8-0 type in North America
Steam locomotive types | |
|---|---|
| Single engine types | 0-2-2 • 2-2-0 • 2-2-2 • 2-2-4 • 4-2-0 • 4-2-2 • 4-2-4 • 6-2-0 0-4-0 • 0-4-2 • 0-4-4 • 2-4-0 • 2-4-2 • 2-4-4 • 4-4-0 • 4-4-2 • 4-4-4 0-6-0 • 0-6-2 • 0-6-4 • 2-6-0 • 2-6-2 • 2-6-4 • 2-6-6 • 4-6-0 • 4-6-2 • 4-6-4 0-8-0 • 0-8-2 • 0-8-4 • 2-8-0 • 2-8-2 • 2-8-4 • 2-8-6 • 4-8-0 • 4-8-2 • 4-8-4 • 4-8-6 • 6-8-6 0-10-0 • 0-10-2 • 2-10-0 • 2-10-2 • 2-10-4 • 4-10-0 • 4-10-2 0-12-0 • 2-12-0 • 2-12-2 • 2-12-4 • 4-12-2 • 4-14-4 |
| Duplex engine types | 4-4-4-4 • 6-4-4-6 • 4-4-6-4 • 4-6-4-4 |
| Garratt (articulated) types | 0-4-0+0-4-0 • 2-6-0+0-6-2 • 4-6-2+2-6-4 • 2-8-0+0-8-2 • 4-8-2+2-8-4 • 4-8-4+4-8-4 |
| Mallet (articulated) types | 0-4-4-0 • 0-4-4-2 • 2-4-4-2 0-6-6-0 • 2-6-6-0 • 2-6-6-2 • 2-6-6-4 • 2-6-6-6 • 2-6-8-0 • 4-6-6-2 • 4-6-6-4 0-8-8-0 • 2-8-8-0 • 2-8-8-2 • 2-8-8-4 • 4-8-8-2 • 4-8-8-4 2-10-10-2 • 2-8-8-8-2 • 2-8-8-8-4 |
