Wylam Dilly

Above: Working model of Wylam Dilly on display in the Window on the World at the National Museum of Scotland.

The Wylam Dilly steam locomotive is named after the Wylam Colliery, where the locomotive was used. A ‘dilly’ was the name of the coal trucks used on the wagonway.

Previously, the job of pulling coal along the wagonway had been done by horses. But a growing demand for coal in the 1800s meant that colliery managers and owners needed a quicker way of getting coal to their customers.

Inventing the locomotive

In the early 1800s a number of people were trying to find new ways of using steam power, especially for moving goods from one place to another. The most famous name associated with steam power is Stephenson. The ‘father of the locomotive’, George Stephenson (who was born in Wylam and worked briefly at the colliery) finished work on his first locomotive, ‘Blücher’, in 1814. His son Robert Stephenson’s most famous engine, ‘The Rocket’, built in 1829, set the blueprint for locomotives for the next 150 years. The original is in the Science Museum, but you can see a working model on Level 3 of the Window on the World at National Museum of Scotland.

Above: Working model of Stephenson's 'Rocket'.

William Hedley

Before George Stephenson, industrial engineer William Hedley was also looking at how steam power could be used in his work. William Hedley was born in Newburn, west of Newcastle upon Tyne, in 1779. In 1805 he was appointed as Colliery Manager of the Wylam Colliery. Soon after his appointment, an engineer at the nearby Middleton Colliery invented a new locomotive. It used gears meshing on a toothed rack laid between the rails to haul itself along.

Hedley’s locomotive

In 1812 William Hedley began to design and build his own steam locomotive which would run along the Wylam Wagonway.

Hedley’s locomotive would be designed to run on smooth rails rather than using a rack between the rails. In 1812, Hedley had proved by experiment that a locomotive could pull wagons which were heavier than the locomotive without using racked rails – a feat which had previously not been thought possible.

Above: Hedley's experiment using a locomotive on smooth rails to pull heavy goods.

By 1813 Hedley had built his first locomotive, and a second was underway. These two locomotives were Wylam Dilly and Puffing Billy, which is now on display at the Science Museum in London.

Above: Wylam Dilly with Hedley’s sons William and George, photographed between 1869 and 1882.

Wylam Dilly takes to the water

One of the strangest episodes of Wylam Dilly’s history occurred during 1822. Wylam Dilly and Puffing Billy were being used to haul coal from the colliery to the river Tyne. The coal was then off-loaded and put onto keels or small boats to be taken down the river.

In 1822 the keelmen who piloted the small boats went on strike and coal began to pile up on the riverbank. Hedley decided to turn Wylam Dilly into a tugboat, to pull cargo behind her along the river. This broke the strike.

Wylam Dilly contined to work as a tugboat for some time before being turned back into a railway locomotive.

Above: The amphibious Wylam Dilly pulling cargo along the river.

Wylam Dilly at the Museum

Wylam Dilly worked along the Wylam Wagonway from 1813 until 1882. She worked for 20 years longer than her sister locomotive, Puffing Billy, who was sent to the Science Museum in 1862.

During her 70 years of service, Wylam Dilly was adapted many times. One major change was that the locomotive was given eight wheels instead of four, so the weight of the engine would be spread more evenly.

Above: Wylam Dilly on rails before coming to the museum in 1882.

When the colliery closed, Wylam Dilly was bought by two of William Hedley’s sons, who gave the locomotive to the Museum in Edinburgh in 1882. Wylam Dilly has been in the Museum ever since, except for a short trip in 1890 to be displayed in the Edinburgh International Exhibition of Electrical Engineering.

Above: Archive photo of Wylam Dilly on display in the 'Hall of Power'.

Working model of Wylam Dilly

Near the model of Stephenson's 'Rocket' in the Window on the World, you'll find a working model of Wylam Dilly, made in the Museum workshop to a scale of 4 inches to 1 foot, in 1885.

Above: This archive photo shows the working model of the Wylam Dilly on display in the 'Hall of Power' in the Museum.