science

Wylam Dilly

Wylam Dilly is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Wylam Dilly rather than just read about it. In short: Wylam Dilly is the second oldest surviving railway locomotive in the world; it was built circa 1815 by William Hedley and Timothy Hackworth for Christopher Blackett, the owner of Wylam colliery, west of Newcastle upon Tyne. Wylam Dilly was initially designed for and used on the Wylam Waggonway to transport coal.

Key takeaways

Wylam Dilly belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Wylam Dilly to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wylam Dilly from memory before moving on to harder problems.

Reference excerpt

Wylam Dilly is the second oldest surviving railway locomotive in the world; it was built circa 1815 by William Hedley and Timothy Hackworth for Christopher Blackett, the owner of Wylam colliery, west of Newcastle upon Tyne. Wylam Dilly was initially designed for and used on the Wylam Waggonway to transport coal. The four driving wheels are connected by a train of spur wheels driven by a central crankshaft. Because it proved too heavy for the cast iron plateway in its original form, the locomotive was rebuilt with eight wheels in 1815, but returned to its original design in 1830 after the track was relaid with wrought iron rails. The locomotive was still at work in 1862 when it was moved to Craghead Colliery. After withdrawal it was presented to the Edinburgh Museum of Science and Art in 1883, now called the National Museum of Scotland, where it is currently on display. The first steam locomotive of its class, Puffing Billy, is in the Science Museum in London. In 1822, the locomotive was temporarily mounted on a keel and served as the engine for a steam paddlewheeler that ferried strikebreakers on the River Tyne. 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 were not present in Puffing Billy.

References

Bibliography Smith, George Turner (2015). Thomas Hackworth: Locomotive Engineer. Fonthill. pp. 26–32. ISBN 978-1-78155-464-7. Bailey, Michael R. (2014). "2: The First Industrial Locomotives: 1812–1815". Loco Motion. The History Press. pp. 23–30. ISBN 978-0-7524-9101-1.

Illustrations

Worked examples

Example 1 — a first encounter with Wylam Dilly

Start with the simplest possible case. Write down what Wylam Dilly claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Wylam Dilly before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Wylam Dilly ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Wylam Dilly

In research: Wylam Dilly appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Wylam Dilly in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Wylam Dilly is common in secondary-school and first-year university syllabi. It links to neighbouring topics 5 ft gauge locomotives, Early steam locomotives, Individual locomotives of Great Britain, so understanding it makes those chapters shorter.
In everyday life: Look for Wylam Dilly outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Wylam Dilly in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Wylam Dilly means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Wylam Dilly out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Wylam Dilly in simple terms?

Why does Wylam Dilly matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Wylam Dilly?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Wylam Dilly.