Wylam Dilly is one of the two oldest surviving railway

Rail transport

Rail transport is a means of conveyance of passengers and goods by way of wheeled vehicles running on rail tracks. In contrast to road transport, where vehicles merely run on a prepared surface, rail vehicles are also directionally guided by the tracks they run on...

 locomotive

Locomotive

A locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco – "from a place", ablative of locus, "place" + Medieval Latin motivus, "causing motion", and is a shortened form of the term locomotive engine, first used in the early 19th...

s in the world; it was built circa 1815 by William Hedley

William Hedley

William Hedley was one of the leading industrial engineers of the early 19th century, and was very instrumental in several major innovations in early railway development...

 and Timothy Hackworth

Timothy Hackworth

Timothy Hackworth was a steam locomotive engineer who lived in Shildon, County Durham, England and was the first locomotive superintendent of the Stockton and Darlington Railway.- Youth and early work :...

. Wylam Dilly was initially designed for and used on the Wylam

Wylam

 Wylam is a small village about west of Newcastle upon Tyne. It is located in the county of Northumberland.It is famous for the being the birthplace of George Stephenson, one of the early rail pioneers. George Stephenson's Birthplace is his cottage that can be found on the north bank of the...

 Waggonway (or Wagonway

Wagonway

Wagonways consisted of the horses, equipment and tracks used for hauling wagons, which preceded steam powered railways. The terms "plateway", "tramway" and in someplaces, "dramway" are also found.- Early developments :...

) to transport coal. It is currently on display in the Royal Museum in Edinburgh

Edinburgh

Edinburgh is the capital city of Scotland, the second largest city in Scotland, and the eighth most populous in the United Kingdom. The City of Edinburgh Council governs one of Scotland's 32 local government council areas. The council area includes urban Edinburgh and a rural area...

. A similar steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

, Puffing Billy

Puffing Billy (locomotive)

Puffing Billy is an early railway steam locomotive, constructed in 1813-1814 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...

is in the Science Museum

Science Museum (London)

The Science Museum is one of the three major museums on Exhibition Road, South Kensington, London in the Royal Borough of Kensington and Chelsea. It is part of the National Museum of Science and Industry. The museum is a major London tourist attraction....

 in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

.

In 1822 the locomotive was mounted on a keel and served as the engine for a steam paddlewheeler

Paddle steamer

A paddle steamer is a steamship or riverboat, powered by a steam engine, using paddle wheels to propel it through the water. In antiquity, Paddle wheelers followed the development of poles, oars and sails, where the first uses were wheelers driven by animals or humans...

 that ferried strikebreakers on the River Tyne

River Tyne

The River Tyne is a river in North East England in Great Britain. It is formed by the confluence of two rivers: the North Tyne and the South Tyne. These two rivers converge at Warden Rock near Hexham in Northumberland at a place dubbed 'The Meeting of the Waters'.The North Tyne rises on the...

.

Until a thorough examination of Wylam Dilly and Puffing Billy was undertaken in 2008, it was thought that Wylam Dilly was the oldest surviving steam locomotive in the world. The research results, released in late 2008, showed that Wylam Dilly was built after Puffing Billy incorporating improvements on the locomotive's design that weren't present in Puffing Billy.