Puffing Billy (locomotive)

For other uses, see Puffing Billy.

Puffing Billy

Puffing Billy as seen from the front

Type and origin Power type Steam Builder William Hedley, Jonathan Forster and Timothy Hackworth Build date 1813–1814

Specifications Gauge 5 ft (1,524 mm) Driver diameter 39 in (991 mm) Loco weight 8.25 long tons (8.38 t; 9.24 short tons) Fuel type Coal Boiler pressure 50 psi (0.34 MPa) Cylinders 2 Cylinder size 9 in × 36 in (229 mm × 914 mm)

Performance figures Maximum speed 5 mph (8 km/h)

Career Operators Wylam Colliery Retired 1862 Current owner Science Museum, London Disposition static display

Puffing Billy is an early railway steam locomotive, constructed in 1813–14 by engineer William Hedley, enginewright Jonathan Forster and blacksmith Timothy Hackworth for Christopher Blackett, the owner of Wylam Colliery near Newcastle upon Tyne, in the United Kingdom. It is the world's oldest surviving steam locomotive. It was the first commercial adhesion steam locomotive, employed to haul coal chaldron wagons from the mine at Wylam to the docks at Lemington-on-Tyne in Northumberland.

History

Puffing Billy was one of the three similar engines built by Hedley, the resident engineer at Wylam Colliery, to replace the horses used as motive power on the tramway. In 1813 Hedley built for Blackett's colliery business on the Wylam Colliery line the prototypes, "Puffing Billy" and "Wylam Dilly". They were both rebuilt in 1815 with ten wheels, but were returned to their original condition in 1830 when the railway was relaid with stronger rails.

In the September 1814 edition of Annals of Philosophy two locomotives with rack wheels are mentioned (probably Salamanca and Blücher), then there is mention of "another steam locomotive at Newcastle, employed for a similar purpose [hauling coals], and moving along without any rack wheel, simply by its friction against the rail road". From the context this is at a different location to Blücher, so is probably Puffing Billy.

Puffing Billy remained in service until 1862, Edward Blackett, the owner of Wylam Colliery, lent it to the Patent Office Museum in South Kensington, London (later the Science Museum). He later sold it to the museum for £200. It is still on display there. Its sister locomotive, Wylam Dilly, is preserved in the Royal Museum in Edinburgh.

A replica has been built and was first run in 2006 at Beamish Museum. Another replica, built 1906 in a Royal Bavarian State Railways workshop, can be found in the German Museum, Munich.

Design

Puffing Billy incorporated a number of novel features, patented by Hedley, which were to prove important to the development of locomotives. It had two vertical cylinders on either side of the boiler, and partly enclosed by it, and drove a single crankshaft beneath the frames, from which gears drove and also coupled the wheels allowing better traction.

Eight-coupled form

Final four-wheeled form, in 1862

Current appearance in its present location, in 2011

The engine had a number of serious technical limitations. Running on cast iron Wagonway plates, its eight-ton weight was too heavy and broke them, encouraging opponents of locomotive traction to criticise the innovation. This problem was alleviated by redesigning the engine with four axles so that the weight was spread more evenly. The engine was eventually rebuilt as a four-wheeler when improved edge rails track was introduced around 1830. It was not particularly fast, being capable of no more than 5 mph (8 km/h).

Legacy

Puffing Billy was an important influence on George Stephenson, who lived locally, and its success was a key factor in promoting the use of steam locomotives by other collieries in north-eastern England.

It also entered the language as a metaphor for an energetic traveller, and phrases like "puffing like Billy-o" and "running like Billy-o" are thought to derive from the locomotive's name.